KR102594903B1 - Clothes treatment apparatus and controlling method of the same - Google Patents

Abstract

The present disclosure provides a pressure vessel for maintaining carbon dioxide contained therein at a pressure greater than atmospheric pressure, a storage tank for storing carbon dioxide to supply carbon dioxide to the pressure vessel, and a pressure vessel for separating foreign substances dissolved in carbon dioxide discharged from the pressure vessel. A distillation tank storing carbon dioxide discharged from the pressure vessel, a recovery passage located outside the pressure vessel and circulating gaseous carbon dioxide in the pressure vessel; and a recovery heat exchanger located in the recovery passage, which exchanges heat with the gaseous carbon dioxide passing through the recovery passage to liquefy the gaseous carbon dioxide.

Description

Clothes treatment apparatus and controlling method of the same}

This disclosure relates to a clothing treatment device. More specifically, it relates to a clothing treatment device that performs clothing processing, such as washing, using carbon dioxide as a laundry solvent.

A clothing treatment device is a device developed to wash and dry clothing at home and in laundries, and to remove wrinkles from clothing. Classified as clothing processing devices include washing machines that wash clothes, dryers that dry clothes, washer/dryers that have both washing and drying functions, clothes care machines that refresh clothes, and clothes that remove wrinkles from clothes. It is a concept that includes steamers, etc.

Recently, carbon dioxide (CO ₂ ) has emerged as a new laundry solvent. Carbon dioxide is a colorless and odorless gas at room temperature at atmospheric pressure, so when the high-pressure washing process is completed and the pressure is lowered to atmospheric pressure, the carbon dioxide evaporates, so there is no need for a separate drying process. Additionally, since it is one of the components of general air, it does not pollute the environment.

Additionally, when using a distillation tank, it is possible to remove only foreign substances from the contaminated carbon dioxide after washing and then distill the clean carbon dioxide for reuse. For this purpose, only liquid carbon dioxide is vaporized from liquid carbon dioxide in which foreign substances are dissolved, separated from foreign substances, and then the vaporized pure liquid carbon dioxide is liquefied again and used.

For this distillation, carbon dioxide gas is required to be compressed at high temperature and pressure. This is to continuously vaporize liquid carbon dioxide through heat exchange between high-temperature gaseous carbon dioxide and liquid carbon dioxide in which foreign substances are dissolved. Additionally, carbon dioxide must be used to recover gaseous carbon dioxide remaining in the washing chamber or pressure vessel after distillation.

European Patent Publication EP2576886B1 discloses a distillation step and recovery step using carbon dioxide. However, in order to compress carbon dioxide, the pressure difference before and after compression is large, so there is a problem that energy consumption is high and a large size must be used to compress it all at once.

US Patent Publication US10352591B2 discloses a clothing device that utilizes energy efficiently using two-stage compression. However, due to its nature, it may be mixed with carbon dioxide, such as oil for lubrication or other impurities caused by friction. This has the problem of ultimately deteriorating washing performance.

First, the present disclosure aims to solve the problem of preventing oil for lubrication or other impurities caused by friction from entering due to the use of carbon dioxide.

Second, the present disclosure aims to solve the problem of using a compressor that compresses a refrigerant that is small in size, unlike carbon dioxide, in the distillation step and the recovery step of recovering gaseous carbon dioxide after the distillation step.

Third, the present disclosure aims to minimize energy consumption during vaporization of liquid carbon dioxide, movement of vaporized carbon dioxide, and liquefaction in the distillation step.

Fourth, the present disclosure aims to solve the problem of distilling carbon dioxide using the thermosiphon phenomenon.

In order to solve the above-described problem, the clothing treatment apparatus of the present disclosure may use a compressor that compresses refrigerant instead of a compressor that compresses gaseous carbon dioxide. In addition, a heat exchanger is installed in the storage tank and the distillation tank, respectively, so that the vaporization of liquid carbon dioxide in the distillation tank is accomplished through heat exchange with a refrigerant compressed at high temperature and high pressure, and the vaporization of gaseous carbon dioxide in the storage tank is expanded and cooled. This is achieved through heat exchange with the refrigerant.

Additionally, movement from the storage tank to the distillation tank can be accomplished without a separate fluid transfer device such as a pump or compressor.

For this purpose, a pressure vessel that maintains the carbon dioxide contained therein at a pressure greater than atmospheric pressure; a storage tank for storing carbon dioxide to supply carbon dioxide to the pressure vessel; a distillation tank storing carbon dioxide discharged from the pressure vessel to separate foreign substances dissolved in the carbon dioxide discharged from the pressure vessel; a recovery passage located outside the pressure vessel and circulating gaseous carbon dioxide in the pressure vessel; and a recovery heat exchanger located in the recovery passage, which exchanges heat with the gaseous carbon dioxide passing through the recovery passage to liquefy the gaseous carbon dioxide.

The clothing processing device may further include a recovery body located in the recovery passage, accommodating the recovery heat exchanger, and storing carbon dioxide that is liquefied after passing through the recovery heat exchanger.

The clothing treatment device may further include a recovery tank located between the pressure vessel and the distillation tank to store the liquefied carbon dioxide.

The clothing treatment device includes a recovery compressor that compresses and circulates a refrigerant to exchange heat with the gaseous carbon dioxide through the recovery heat exchanger; And it may further include a recovery fan located in the recovery passage to circulate gaseous carbon dioxide in the pressure vessel.

The clothing processing device includes a first recovery valve located on the first recovery pipe connecting the recovery passage and the recovery tank to move the liquefied carbon dioxide, and opening and closing the first recovery pipe. More may be included.

The clothing treatment apparatus includes a second recovery pipe connecting the recovery tank and the distillation tank to move gaseous carbon dioxide among the carbon dioxide stored in the distillation tank; a second recovery valve located on the second recovery pipe and opening and closing the second recovery pipe; a third recovery pipe connecting the recovery tank and the distillation tank to move liquid carbon dioxide among the carbon dioxide stored in the recovery tank; and a third recovery valve located on the third recovery pipe to open and close the third recovery pipe.

In addition, the clothing treatment device includes a distillation heat exchanger located inside the distillation tank and exchanging heat with carbon dioxide stored inside the distillation tank; a storage heat exchanger located inside the storage tank and exchanging heat with carbon dioxide stored inside the storage tank; a distillation compressor for compressing the refrigerant circulating through the distillation heat exchanger and the storage heat exchanger; and a distillation refrigerant flow path connecting the distillation heat exchanger, the storage heat exchanger, and the distillation compressor to form a flow path through which the refrigerant circulates.

The distillation heat exchanger may be located inside the distillation tank at the bottom of the distillation tank, and the storage heat exchanger may be located inside the storage tank at the top of the distillation tank.

The clothing treatment apparatus may further include a distillation expansion unit that expands the refrigerant that has passed through the distillation heat exchanger on the distillation refrigerant flow path.

The distillation refrigerant flow path connects the distillation compressor and the distillation heat exchanger to move the refrigerant compressed in the distillation compressor to the distillation heat exchanger; a second circulation pipe connecting the distillation heat exchanger and the distillation expansion unit to move the refrigerant that has exchanged heat with carbon dioxide stored in the distillation tank in the distillation heat exchanger to the distillation expansion unit; a third circulation pipe connecting the distillation expansion unit and the storage heat exchanger to move the cooled refrigerant through the distillation expansion unit to the storage heat exchanger; and a fourth circulation pipe that connects the storage heat exchanger and the distillation compressor to transfer the refrigerant that has exchanged heat with the carbon dioxide stored in the storage tank in the storage heat exchanger to the distillation compressor.

The temperature of the refrigerant passing through the second circulation pipe may be higher than the temperature of the refrigerant passing through the third circulation pipe.

The temperature of the refrigerant passing through the distillation heat exchanger may be higher than the temperature of the refrigerant passing through the storage heat exchanger.

In addition, the clothing treatment device may further include a storage pipe that connects the distillation tank and the storage tank and moves gaseous carbon dioxide stored inside the distillation tank to the storage tank.

The storage pipe may connect the top of the distillation tank to the top of the storage tank.

Meanwhile, a pressure vessel that maintains the carbon dioxide contained therein at a pressure greater than atmospheric pressure; a drum rotatably provided inside the pressure vessel to accommodate clothing; a storage tank for storing carbon dioxide to supply carbon dioxide to the pressure vessel; In the control method of a clothing treatment apparatus including a distillation tank storing carbon dioxide discharged from the pressure vessel to separate foreign substances dissolved in the carbon dioxide discharged from the pressure vessel, the drum is rotated at a preset rotation speed to , a rinsing step of separating foreign substances using friction between the liquid carbon dioxide supplied from the storage tank and the clothing; A discharge step of discharging the liquid carbon dioxide used in the pressure vessel into the distillation tank upon completion of the rinsing step; and liquefying the gaseous carbon dioxide remaining in the pressure vessel by heat exchange with a recovery passage that circulates outside the pressure vessel and a recovery heat exchanger located on the recovery passage, and then storing it in a recovery tank located between the pressure vessel and the distillation tank. To provide a control method of a clothing treatment device including a recovery step.

The control method of the clothing treatment device is to vaporize the liquid carbon dioxide stored in the distillation tank and move it to the storage tank through heat exchange with a distillation heat exchanger located in the distillation tank after the discharge step, and heat exchange with a storage heat exchanger located in the storage tank. It may further include a distillation step of liquefying the gaseous carbon dioxide stored in the storage tank.

First, the present disclosure can prevent oil for lubrication or other impurities due to friction from mixing due to the use of a carbon dioxide compressor.

Second, the present disclosure can utilize a compressor that compresses a small-sized refrigerant, unlike a carbon dioxide compressor, in the distillation step and the recovery step of recovering gaseous carbon dioxide after the distillation step.

Third, the present disclosure can minimize energy consumption during vaporization of liquid carbon dioxide, movement of vaporized carbon dioxide, and liquefaction in the distillation step.

Fourth, the present disclosure can distill carbon dioxide using the thermosiphon phenomenon.

Figures 1(a) and 1(b) show an example of a clothing treatment device described in this disclosure.
Figure 2 shows an example of a drum and driving unit provided inside a pressure vessel.
Figures 3(a) and 3(b) show the front and side views of the partition, respectively.
Figure 4 shows the components of a typical clothing treatment device using carbon dioxide as a laundry solvent.
Figure 5(a) shows the movement of heat during the distillation step in a typical clothing treatment device. Figure 5(b) shows the movement of heat in the distillation step using the thermosiphon phenomenon. Figure 5(c) shows the distillation step and recovery step using the thermosiphon phenomenon.
Figure 6 is a schematic diagram of the circulation of refrigerant during the distillation step performed in the clothing treatment apparatus of the present disclosure.
Figure 7 is a diagram showing the movement of gaseous carbon dioxide that exchanges heat with the refrigerant from the distillation tank to the storage tank during the distillation step.
Figure 8 schematically illustrates the recovery step of recovering gaseous carbon dioxide remaining in the pressure vessel after the distillation step.
Figure 9 schematically illustrates the recovery and discharge step of moving the carbon dioxide stored in the recovery tank to the storage tank after the recovery step.
Figure 10 is a flow chart briefly showing the washing process performed in the laundry treatment apparatus of the present disclosure.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the attached drawings. The configuration or control method of the device described below is only for explaining the embodiments of the present disclosure and is not intended to limit the scope of the present disclosure, and the same reference numbers used throughout the specification indicate the same components. .

Specific terms used in this specification are merely for convenience of explanation and are not used to limit the illustrated embodiments.

For example, expressions such as “same” and “is the same” not only indicate a strictly identical state, but also indicate a state in which there is a difference in tolerance or the degree to which the same function can be obtained.

For example, expressions that express relative or absolute arrangement such as “in a certain direction,” “along a certain direction,” “side by side,” “perpendicularly,” “at the center,” “concentric,” or “coaxial,” Not only does it strictly represent the arrangement, but it also represents the state of relative displacement with a tolerance, or an angle or distance that achieves the same function.

In order to explain the present disclosure, it will be described below based on a spatial orthogonal coordinate system with X, Y, and Z axes orthogonal to each other. Each axis direction (X-axis direction, Y-axis direction, Z-axis direction) refers to both directions in which each axis extends. The '+' sign in front of each axis direction (+X-axis direction, +Y-axis direction, +Z-axis direction) means the positive direction, which is one of the two directions in which each axis extends. The '-' sign in front of each axis direction (-X-axis direction, -Y-axis direction, -Z-axis direction) means the negative direction, which is the other direction among the two directions in which each axis extends.

Expressions referring to directions such as “front (+Y)/back (-Y)/left (+X)/right (-X)/up (+Z)/down (-Z)” mentioned below are It is defined according to the coordinate axis, but this is for explanation so that the present disclosure can be clearly understood, and of course, each direction may be defined differently depending on where the reference is placed.

The use of terms such as 'first, second, and third' in front of the components mentioned below is only to avoid confusion about the components to which they are referred, as well as the order, importance, or master-slave relationship between the components, etc. is irrelevant. For example, an invention that includes only the second component without the first component can also be implemented.

As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise.

Hereinafter, the present disclosure has been described on the premise that carbon dioxide is used as a laundry solvent, but other laundry solvents other than carbon dioxide may be used.

Figures 1(a) and 1(b) show a clothing treatment device 1000 as an example of the present disclosure. Referring to FIG. 1(a), the laundry treatment device 1000 is a pressure vessel (or washing chamber, 200) that maintains carbon dioxide contained therein at a pressure greater than atmospheric pressure, and is located at the top of the pressure vessel 200. , located at the bottom of the storage tank 150 and the pressure vessel 200, which stores carbon dioxide and supplies carbon dioxide to the pressure vessel 200, and vaporizes liquid carbon dioxide among the carbon dioxide discharged from the pressure vessel 200. After separating foreign substances, it includes a distillation unit 400 that liquefies the vaporized carbon dioxide and supplies it to the storage tank 150.

Located at the top of the pressure vessel 200, when viewed from the front, the vertical height from the bottom to the center of the circular cross-section of the pressure vessel 200, which has a cylindrical shape, is greater than that of the cylindrical storage tank 150. This means that the vertical height to the center of the circular cross section is greater. This is interpreted similarly to the distillation tank of the distillation unit 400, so that the distillation tank 401 can be located below the pressure vessel 200.

That is, the installation height of the storage tank 150 may be higher than the installation height of the pressure vessel 200, and the installation height of the distillation tank 401 may be lower than the installation height of the pressure vessel 200.

Additionally, the laundry treatment device 1000 may include a cabinet 100 that forms an exterior. The pressure vessel 200 may include a drum 300 rotatably provided inside the pressure vessel 200 to accommodate clothing, and a driving unit 500 that rotates the drum 300.

In addition, the clothing treatment device 1000 further includes a frame 110 inside the cabinet 100 to support the cabinet and to support the pressure vessel, the storage tank 150, and the distillation unit 400. It can be included.

The clothing processing device 1000 supplies carbon dioxide from the storage tank 150 to the pressure vessel 200 according to the user's input, and then rotates the drum 300 to separate the clothes stored in the drum 300. A washing process can be performed to separate foreign substances from the clothes using friction between liquid carbon dioxide.

The washing process refers to a series of steps performed by the clothing processing device 1000 when a user selects a course to wash clothing. The washing process includes a pressurization step and a supply step of supplying carbon dioxide from the storage tank 150 to the pressure vessel 200, and rotating the drum 300 at a preset first rotation speed to reduce friction between liquid carbon dioxide and clothing. It may include a washing step of separating foreign substances from clothing using a washing step, and a rinsing step of separating foreign substances from clothing by rotating the drum 300 at a preset second rotation speed and using friction between liquid carbon dioxide and clothing. .

The rinsing step can be repeated twice. Preferably, the inside of the pressure vessel (or washing chamber) 200 can be performed at a temperature of approximately 45 to 51 bar and 10 to 15°C, and the washing step can be performed for 10 to 15 minutes and the rinsing step can be performed for 3 to 4 minutes.

After the washing step and the rinsing step are completed, a distillation step may be included. Distillation means heating a specific liquid mixed with foreign substances (or contaminants) to vaporize (or evaporate) only the specific liquid and then cooling it again to separate only the specific pure liquid. In this specification, it refers to the step of vaporizing liquid carbon dioxide mixed with foreign substances separated from clothing and then cooling to separate only pure liquid carbon dioxide. The separated liquid carbon dioxide can be supplied back to the storage tank and then reused in the next step.

The cabinet 100 includes a cabinet bottom surface (not shown) forming the bottom surface of the laundry treatment device 1000, an upper panel (not shown) forming the upper surface of the cabinet 100, and the cabinet 100. A front panel 103 that forms the front surface and connects the cabinet bottom and the top panel, a side panel (not shown) that forms both sides of the cabinet 100 and connects the cabinet bottom and the top panel, and It may include a rear panel (not shown) forming the rear surface of the cabinet.

The front panel 103 may be provided with a cabinet inlet 1031 through which clothes can be put into the drum 300 or clothes stored in the drum 300 can be taken out of the cabinet 100. Additionally, the laundry treatment device 1000 may include a door 130 rotatably provided on the front panel 103 to open and close the cabinet inlet 1031.

The pressure vessel 200 is located inside the cabinet 100 and can accommodate carbon dioxide. The pressure vessel 200 may include a vessel inlet 219 capable of communicating with the cabinet inlet. When the door 130 is closed, not only the cabinet inlet 1031 but also the container inlet 219 is closed, so that the pressure vessel 200 is a pressure vessel or pressure vessel capable of containing high-pressure carbon dioxide. It can be.

For example, the carbon dioxide supplied to the pressure vessel 200 can be maintained at a predetermined pressure so that it exists as liquid carbon dioxide. Preferably, the pressure is set in a pressure range of 45 bar to 51 bar. It could be a pressure.

The drum 300 may be rotatably provided inside the pressure vessel 200. Specifically, the drum 300 may be rotatably provided in the internal space of the first housing 211 (see FIG. 2), that is, the first chamber 210. The drum 300 may include a plurality of side through holes (not shown) provided on the inner peripheral surface of the drum 300 to allow fluid to communicate between the pressure vessel 200 and the drum 300. That is, the drum 300 may include a drum body 301 that accommodates clothing therein, and a plurality of side penetration holes (not shown) penetrating the side of the drum body.

Carbon dioxide supplied to the pressure vessel 200, specifically the first chamber 210 (see FIG. 2), through the plurality of side penetration holes flows into the receiving space, which is a space where clothes are accommodated inside the drum body. , it can escape from the accommodation space into the space between the first chamber 210 (see FIG. 7) and the drum 300.

The drum 300 may have a cylindrical shape. Alternatively, the drum body 301 forming the outer shape of the drum 300 may be cylindrical.

Therefore, the pressure vessel can function as a washing chamber in which the washing and rinsing steps occur using the drum 300 provided therein.

Referring to Figures 1(a) and 1(b), the storage tank 150, pressure vessel 200, and distillation unit 400 can be located in height order in the height direction based on the bottom surface of the cabinet. there is. This is to move liquid carbon dioxide by gravity even under the same pressure conditions. That is, when the storage tank 150 and the pressure vessel 200 are in communication with each other even if the pressures are the same, liquid carbon dioxide can move from the storage tank 150 to the pressure vessel 200 by gravity. Likewise, even if the pressure of the pressure vessel 200 and the distillation tank 401 of the distillation unit 400 are the same, liquid carbon dioxide is discharged from the pressure vessel 200 to the distillation tank 401 due to gravity due to the height difference. It can be.

In addition, considering the respective weights of the storage tank 150, the pressure vessel 200, and the distillation tank 401 and the size of the clothing treatment device, the storage tank 150, the pressure vessel 200, and the distillation tank ( 401), it would be preferable to arrange it diagonally in the height direction rather than in a straight line in the height direction in terms of weight distribution and miniaturization of the clothing treatment device.

In contrast, as shown in FIG. 1(a), the distillation tank 401 and the storage tank 150 may each be arranged closer to one side of the cabinet 100 than to the other side.

Referring to Figures 1(a) and 1(b), the storage tank 150, pressure vessel 200, and distillation tank 401 are viewed from the front. It is shown as being located closer to the right side of the cabinet than the left side of the cabinet, but it may also be located on the opposite side.

Various compressors (283, 403), a control unit (900), a heat radiation fan (299), and various connection pipes are located in the empty space remaining after the storage tank (150), pressure vessel (200), and distillation tank (401) are placed. can do.

Referring to FIG. 1(b), the control unit 900 may be located at the rear of the cabinet. This is for easy access to the control unit 900. However, this is only an example, and may be located on the side or front. In Figure 1, the control unit 900 is provided in the form of a box, and a control device such as a PLC (Programmable Logic Controller) may be provided inside the box. Alternatively, the control unit 900 may be provided as a PCB including a microcomputer. Figure 1 shows a box-like shape rotatably provided on the frame 110.

The control unit can control the movement of carbon dioxide by controlling the opening and closing of each pipe through various flow control valves. Additionally, the driving unit can be controlled to rotate the drum. In addition, the control unit can receive user input and perform the course or administration selected by the user according to preset steps.

This is in consideration of maintenance as the pressure vessel 200 is exposed when the control unit 900 is rotated.

The heat dissipation fan 299 may be provided to cool the compressors 283 and 403 (see FIG. 6) that compress the refrigerant or to maintain the air inside the cabinet 100 at a constant temperature. Figure 1 shows an example in which the heat dissipation fan is located at the rear lower part of the cabinet, but it can be installed anywhere as long as it can cool the compressors 283 and 403 and maintain the air inside the cabinet 100 at a constant temperature. do. The compressors 283 and 403 can be used to compress gaseous carbon dioxide in the distillation step. Alternatively, heat can be supplied to the pressure vessel 200 using high-temperature gaseous carbon dioxide compressed in the recovery step.

Figure 2 shows a pressure vessel 200. The pressure vessel 200 can accommodate carbon dioxide at a pressure greater than atmospheric pressure. This is because liquid carbon dioxide is needed to wash clothes, and high pressure is essential for this. The pressure vessel 200 may include a drum 300 and a driving unit 500 therein.

Specifically, the pressure vessel 200 may include a first housing 211 and a second housing 221 that form the external shape of the pressure vessel. The first housing 211 may form a first chamber 210, which is a space into which a drum 300 containing clothes is inserted.

The drum 300 is provided so that it can rotate, so that the liquid carbon dioxide and the clothing are mixed with each other while the clothing is accommodated therein.

The first housing 211 may be formed with a first opening 213 that opens in the direction opposite to the container inlet 219 formed in the front, that is, in the direction in which it is coupled to the second housing. That is, the first opening 213 is located on the opposite side of the container inlet 219 and may be larger than the container inlet 219.

The first housing 211 has an overall cylindrical shape, and the container inlet 219 having a circular shape is formed on one side, and the first opening 213 having a circular shape may be provided on the other side. .

The drum 300 may be provided in a cylindrical shape similar to the shape of the first chamber 210, which is the internal space of the first housing 211. Additionally, the drum 300 can rotate clockwise or counterclockwise within the first housing 211.

The size of the first opening 213 may be larger than the cross-sectional size of the drum 300 so that a worker or user can take out the drum 300 through the first opening 213 and perform repairs. At this time, the size of the first opening 213 may be larger than the maximum cross-sectional size of the drum 300. Accordingly, a worker or the like can separate the first housing 211 and the second housing 221 and then open the first opening 213 to remove the drum 300. Additionally, it is possible to install the drum 300 inside the first housing 211 through the first opening 213.

The first housing 211 is provided with an inflow pipe (not shown) through which carbon dioxide is supplied from the storage tank 150 to the first housing 211. The inlet pipe is a pipe exposed to the outside of the first housing 211 through which carbon dioxide can be moved from the storage tank 150 to the inside of the first housing 211, that is, the first chamber 210. there is.

The first housing 211 may include a filter unit 350 that filters large foreign substances that do not dissolve in liquid carbon dioxide when the liquid carbon dioxide used in the first chamber 210 moves to the distillation unit 400. . The filter unit 350 may be provided on the lower outer peripheral surface of the first housing 211. The filter unit 350 is formed to protrude in the radial direction from the cylindrical shape of the first housing 211, thereby forming a space into which the filter can be inserted. It may include a filter insertion part 351, and a discharge hole for discharging liquid carbon dioxide that passes through the filter through the filter insertion part 351 into the distillation tank 401.

The first housing 211 and the distillation tank 401, specifically, the discharge hole 352 and the distillation tank 401 may be connected through a discharge pipe 630 (see FIG. 6).

The first housing 211 may include a first flange 212 formed along the first opening 213. The first flange 212 may extend in the radial direction along the outer peripheral surface of the first housing 211, similar to the cylindrical shape of the first housing 211. The first flange 212 is evenly disposed along the circumference of the first housing 211 in the direction in which the radius of the first housing 211 increases.

Referring to FIG. 2, the second housing 221 may be coupled to the first housing 211 to form one pressure vessel 200. At this time, the interior of the pressure vessel 200 includes a first chamber 210, which is a space where clothing is processed by the separation unit 250, and a second chamber, which is a space where a driving unit 500 that provides driving force to rotate the drum is installed. It can be separated into (220). However, this is only one example, and the pressure vessel 200 is not divided by the separation part 250, and the inside of the pressure vessel 200 may be formed as one space.

Roughly, the separation part 250 may be coupled to the first opening 213 in a disk shape. Through this, the first chamber 210 of the internal space of the pressure vessel 200 is formed by the first housing 211 and the separation part 250, and the second chamber 220 is formed by the second housing. It may be formed by 221 and the separation portion 250. The first chamber 210 can accommodate the drum 300, and the second chamber 220 can accommodate the driving unit 500. Accordingly, the center of the separation unit 250 may be provided with a through hole for connecting the rotating shaft (not shown) provided in the driving unit 500 to the drum 300 therebetween.

The second housing 221 may include a second flange 222 coupled to the first flange 212. The second housing 221 may be formed to have a size similar to the cross-section of the first housing 211 and may be placed behind the first housing 211 .

The second flange 222 is coupled to the first flange 212 by a plurality of fastening members, such as bolts and nuts, so that the second housing 221 is fixed to the first housing 211. It is possible to maintain the internal pressure greater than the external atmospheric pressure.

A filter capable of filtering out foreign substances is disposed in the filter insertion portion 351 provided in the first housing 211. The filter includes a plurality of small holes, and while foreign substances cannot pass through the holes, liquid carbon dioxide can pass through the holes and be discharged to the outside of the first housing 211 through the discharge pipe 630. . For example, the filter may be provided in a mesh form.

Figure 2 shows the partition wall 251 coupled to the first housing 211, but alternatively, the separator 250 may be coupled to the second housing 221.

The separation unit 250 may block liquid carbon dioxide among carbon dioxide stored in the first chamber 210 from moving to the second chamber 220. On the other hand, the separation unit 250 allows gaseous carbon dioxide among the carbon dioxide stored in the first chamber 210 to move freely. This is to reduce stress on the partition wall by achieving pressure balance between the first chamber 210 and the second chamber 220.

That is, when high-pressure carbon dioxide is contained in the first chamber 210 and the second chamber is maintained at atmospheric pressure, or the first chamber 210 is depressurized from high pressure to atmospheric pressure, or increased from atmospheric pressure to high pressure, the The partition wall 251 may be stressed due to a pressure difference, which may cause destruction due to fatigue of the partition wall 251 or deformation due to stress. To prevent this, while maintaining the pressure difference and preventing liquid carbon dioxide from being filled and wasted in unnecessary areas, the partition wall 251 allows gaseous carbon dioxide to move freely but prevents liquid carbon dioxide from moving.

For this purpose, a gasket (not shown) made of graphite may be provided between the partition wall 251 and the seating groove 2122 to which the partition wall is coupled. And all through holes provided in the partition wall, which will be described later, can be sealed except for the second through hole. This is to prevent the movement of liquid carbon dioxide while freely moving gaseous carbon dioxide through the second through hole (2512, see FIG. 3).

At least one second through hole 2512 may be provided at an upper part of the partition wall that does not reach the liquid carbon dioxide. This allows the movement of gaseous carbon dioxide, thereby maintaining pressure balance in the left and right spaces. Ultimately, since there is no pressure difference between the first chamber 210 and the second chamber 220, the graphite gasket does not need to block the movement of liquid carbon dioxide by pressure, but simply blocks the movement by gravity. Therefore, excessive fastening force may not be required.

However, this is only an example, and the pressure vessel accommodates liquid carbon dioxide in the pressure vessel without a separation part 250 or a partition wall 251, that is, without distinguishing between the first chamber 210 and the second chamber 220. It can be. In this case, the driving unit 500 and the drum 300 will be provided in the same space without being divided into chambers by a partition.

Based on FIG. 2, the drum 300 is disposed in the first chamber 210 in the left space of the partition 251, so that clothing and liquid carbon dioxide are mixed to perform clothing treatment such as a washing step or a rinsing step. . On the other hand, the driving unit 500 is disposed in the space on the right side of the partition wall 251 to provide driving force to rotate the drum 300. At this time, a portion of the driving unit 500 may penetrate the partition wall 251 and be coupled to the drum 300.

The partition wall 251 is formed to be larger than the size of the first opening 213 and is disposed in contact with the first opening 213 to seal the first opening 213. The partition 251 and the first opening 213 have a substantially circular shape similar to the shape of the first housing 211, and the diameter (L) of the first opening 213 is equal to that of the partition 251. is smaller than the diameter of The diameter L of the first opening 213 is larger than the diameter of the drum 300. Accordingly, the cross section of the drum 300 is the smallest, the cross section of the first opening 213 is medium, and the partition wall 251 is the largest.

The partition wall 251 is arranged to have a plurality of steps to ensure strength.

A seating groove 2122 to which the partition wall 251 is coupled may be formed in the first flange 212 along the first opening 213. That is, the seating groove 2122 may be provided in a portion extending radially from the first opening 213. The seating groove 2122 is recessed by more than the thickness of the partition wall 251, so that the first flange 212 and the second flange 222 can come into contact with each other. When the seating groove 2122 has the thickness of the partition wall 251 and is formed to have a shape corresponding to the shape of the outer peripheral surface of the partition wall 251, the partition wall 251 is seated in the seating groove 2122. If so, it will be possible for the surface of the first flange 212 to become flat.

The first flange 212 is provided with a first seating surface 2124 extending radially beyond the circumference of the seating groove 2122, and the second flange 222 is provided with a first seating surface 2124. A second seating surface (not shown) that is coupled by surface contact may be provided. The first seating surface 2124 and the second seating surface are placed in contact with each other, thereby preventing carbon dioxide injected into the inner space of the first housing 211 from being discharged to the outside. The first seating surface 2124 and the second seating surface are disposed on the outer peripheral surfaces of the first housing 211 and the second housing 221, so that the two housings are coupled by a fastening member while making surface contact with each other. A bonding surface that can be used can be provided.

When the partition 251 is separated from the first housing 211, the first opening 213 will be exposed. At this time, the drum 300 can be pulled out to the outside through the first opening 213. Since the size of the first opening 213 is larger than that of the drum 300, maintenance of the drum 300 is possible through the first opening 213.

A gasket (not shown) is disposed between the partition wall 251 and the seating groove 2122. Accordingly, when the partition wall 251 is coupled to the first housing 211, carbon dioxide can be prevented from leaking between the partition walls 251 and the first housing 211. When the partition wall 251 is seated in the seating groove 2122, it may be coupled by a plurality of fastening members while compressing the gasket. A plurality of third through holes 2513 (see FIG. 3) for coupling to the first housing 211 may be evenly disposed along the outer peripheral surface of the partition wall 251.

Additionally, the partition wall 251 may be coupled to the driving unit 500 to support the driving unit 500. Since the rotation axis of the driving unit 500 passes through the separating unit 250 and is connected to the drum 300, the partition wall can ultimately serve to support both the drum 300 and the driving unit 500. there is.

Figures 3(a) and 3(b) are views of the partition wall 251 from the front and side, respectively.

Referring to FIG. 3(a), a first through hole 2511 may be formed in the center of the partition wall 251 through which the rotation axis of the driving unit 500 passes to be coupled to the drum 300. The first through hole 2511 has a circular shape, so that interference with the rotation axis passing through the first through hole 2511 can be prevented.

In addition, the partition wall 251 may further include at least one second through hole 2512 through which gaseous carbon dioxide freely moves between the first chamber 210 and the second chamber 220. The at least one second through hole 2512 may be placed at a higher position than the first through hole 2511. The maximum level of liquid carbon dioxide is lower than the height at which the at least one second through hole 2512 is located relative to the floor, so the liquid carbon dioxide can be prevented from moving through the at least one second through hole 2512. there is.

Typically, the amount of liquid carbon dioxide used during the washing or rinsing step does not exceed half of the drum 300. That is, the height of the rotation axis of the driving unit 500 coupled to the drum 300, that is, the minimum height of the first through hole relative to the floor (height to the center of the first through hole - radius of the first through hole), up to or more. It doesn't go up.

Therefore, if the second through hole 2512 is located at a higher position than the first through hole 2511, liquid carbon dioxide will not move through the second through hole 2512. In contrast, since gaseous carbon dioxide is filled in the space between the first housing 211 and the partition wall 251, it freely moves into the space between the second housing 221 and the partition wall 251 to maintain pressure balance. It can be achieved.

That is, while clothing treatment, such as a washing step or a rinsing step, is performed, gaseous carbon dioxide and liquid carbon dioxide are mixed in the space partitioned by the first housing 211 and the partition wall 251. On the other hand, liquid carbon dioxide does not exist in the space divided by the second housing 221 and the partition wall 251, but only gaseous carbon dioxide exists. Since the two spaces are in a state of pressure balance, liquid carbon dioxide does not need to exist in the space formed by the second housing 221 and the partition wall 251, and the amount of liquid carbon dioxide used can be reduced.

Accordingly, the total amount of carbon dioxide used in the washing step or rinsing step can be reduced, thereby reducing the amount of carbon dioxide used compared to the prior art. Therefore, the amount of carbon dioxide that needs to be reprocessed after use will be reduced.

Because the amount of carbon dioxide used is reduced, not only the capacity of the tank storing carbon dioxide but also the overall size of the washing machine for using carbon dioxide can be reduced. Additionally, because the amount of carbon dioxide that must be distilled after use is reduced, the time required for the washing process can ultimately be reduced.

Additionally, when the partition wall 251 is separated from the first housing 211, an environment can be provided in which a user or the like can separate the drum 300 from the first housing 211.

The partition wall 251 is formed to be stepped forward or backward a plurality of times, and strength can be increased. In addition, it is possible to have a curved surface in some sections so that it can withstand forces in various directions.

The outermost part of the partition wall 251 may be shaped to be coupled to the seating groove 2122 of the first housing 211. In addition, the partition wall 251 has a plurality of third through holes in a portion corresponding to the seating groove 2122 in order to be coupled to the first housing 211 using a fastening member after being coupled to the seating groove 2122. (2513) may be included.

With reference to FIG. 3(b), while moving toward the center based on the outermost part of the partition wall 251, steps are made by various lengths in various directions, such as protruding to the left, then to the right, and then again to the left. By doing so, the strength can be increased.

Figure 4 shows an example of components of a typical clothing treatment device that uses carbon dioxide as a laundry solvent. Referring to FIG. 4, a clothing treatment device that utilizes carbon dioxide as a washing solvent includes a pressure vessel 200 that holds clothing and performs washing and rinsing using supplied carbon dioxide, and stores the used carbon dioxide after distillation. (or washing chamber) may include a storage tank 150 supplied to 200 and a distillation unit 40 that distills carbon dioxide discharged after use.

The pressure vessel 200 may further include a filter unit 350 for separating foreign substances that do not dissolve in liquid carbon dioxide discharged after use. As described above, the filter unit 350 may be provided on the lower surface of the pressure vessel 200, but here, for explanation purposes, the filter unit 350 is installed between the pressure vessel 200 and the distillation unit 40. An example of a separately provided device is shown.

In addition, the clothing treatment device 1000 may further include a supplementary tank 155 that supplies carbon dioxide to replenish the carbon dioxide lacking in the pressure vessel 200.

The distillation unit 40 is used to separate foreign substances from the carbon dioxide used in the washing and rinsing steps, that is, the carbon dioxide used in the pressure vessel, and then distill them for reuse. As mentioned above, in order to separate foreign substances from liquid carbon dioxide, especially foreign substances dissolved in liquid carbon dioxide, only the liquid carbon dioxide must be vaporized and then cooled again.

For this purpose, the typical distillation unit 40 is located outside the distillation tank 401, a distillation tank 401 for storing carbon dioxide discharged from the pressure vessel, and sucks gaseous carbon dioxide from the distillation tank 401. A compressing CO ₂ compressor 290 is located inside the distillation tank 401 and is connected to the CO ₂ compressor 290 to heat exchange the compressed gaseous carbon dioxide with liquid carbon dioxide stored inside the distillation tank 401. It may include a heat exchanger (42).

The conventional distillation unit 40 may further include a cooler 160 for liquefying the distilled carbon dioxide.

In Figure 4, each component is schematically shown, the plurality of valves or controllers are omitted, and the plurality of pipes are indicated with lines. And the direction of carbon dioxide movement is indicated by an arrow.

The triple point of carbon dioxide (CO ₂ ) is known to be 5.1 atmospheres (atm) and -56.6 degrees Celsius. Therefore, when the temperature changes under pressure lower than the triple point, the phase changes from solid (dry ice) to gas. While a phase change occurs, it exists as a liquid and a gas under a pressure higher than the triple point, so a phase change may occur between the liquid and the gas depending on the given pressure and temperature.

Therefore, when carbon dioxide is pressurized, liquid carbon dioxide (CO ₂ (L) or L-CO ₂ ) can be used as a washing solvent, just as water is used as a washing solvent in a general clothing treatment device. However, in the case of water-soluble substances, the washing power using carbon dioxide is low, so detergent or surfactant can be additionally used to remove water-soluble substances.

If so, a fluid other than carbon dioxide can be used as a cleaning solvent. The fluid may be a fluid that undergoes a phase change from gas to liquid when pressurized at a predetermined temperature or may be in a supercritical fluid state.

If carbon dioxide is used as a washing solvent, when the pressure is reduced to atmospheric pressure after the washing cycle, all carbon dioxide evaporates into gas, so there is no need to go through a separate drying cycle that requires a long time, and even if there is residual carbon dioxide, there is no odor. It has the advantage of not coming out. However, since carbon dioxide is pressurized and used, unlike the tub of a typical clothing treatment device, a sealed pressure vessel is required to prevent carbon dioxide from leaking.

Therefore, the pressure vessel 200 is a closed container from which pressurized carbon dioxide cannot escape, and must be equipped with a tank that can withstand the pressure of the pressurized carbon dioxide. This also applies to the storage tank 150, replenishment tank 155, and distillation tank 401.

When the distillation unit 40 is configured like the typical clothing treatment device shown in FIG. 4, the CO ₂ compressor 290 requires a larger size than when using a typical refrigerant compressor to meet the required compression ratio. Therefore, this requires a large space inside the clothing treatment device. In addition, when the CO ₂ compressor 290 compresses the CO ₂ compressor 290, lubricating oil, impurities due to friction of the machine driving part, etc. may be mixed with the gaseous carbon dioxide being compressed. This ultimately reduces washing performance. Additionally, when general gas other than a refrigerant is compressed at a high compression ratio, energy is wasted significantly.

In order to solve the above-described problem, the clothing treatment apparatus 1000 described in this disclosure uses a thermosiphon for distillation. Thermosiphon refers to the phenomenon of fluid flowing from a place of high pressure to a place of low pressure without separate mobilization. In this disclosure, the thermosiphon naturally moves high-temperature gaseous carbon dioxide from the distillation tank 401 to the storage tank 150, This occurs because the high-temperature gaseous carbon dioxide that has moved into the storage tank 150 is liquefied.

Liquid carbon dioxide that is used after washing and has dissolved foreign substances is vaporized to produce only pure gaseous carbon dioxide. By liquefying it again, the used carbon dioxide can be reused.

Figures 5(a) to 5(c) are shown to explain the thermosiphon used in the present disclosure. The supply and release of heat is indicated by large arrows, and the movement of carbon dioxide is indicated by solid lines and small arrows. However, in order to simplify the movement of carbon dioxide, the location of the CO ₂ compressor 290 was indicated differently, and the circulation path for heat exchange in the distillation tank was also indicated differently. Figure 5(a) shows the movement of heat and carbon dioxide in a typical clothing treatment device. Gaseous carbon dioxide sucked from the distillation tank 401 into the CO ₂ compressor 290 becomes high-temperature, high-pressure gaseous carbon dioxide, enters the interior of the distillation tank 401 again, exchanges heat with liquid carbon dioxide, and then passes through the cooler 160 to be liquefied and stored. It may be stored in tank 150.

Therefore, the CO ₂ compressor 290 is needed to compress and move carbon dioxide, and in the distillation tank 401, the vaporized carbon dioxide receives heat transferred by high-temperature and high-pressure gaseous carbon dioxide and releases heat through the cooler 160. After that, it will be stored in the storage tank 150. In other words, after supplying heat, the heat is released again, which may consume a lot of energy.

On the other hand, Figure 5(b) shows that carbon dioxide vaporized by receiving heat from the distillation tank 401 naturally moves to the storage tank 150 without the CO ₂ compressor 290. In the storage tank 150, heat will be released and liquefied and stored. To achieve this, something is needed to supply heat to the carbon dioxide stored in the distillation tank 401 and to remove heat from the gaseous carbon dioxide in the storage tank 150. For this purpose, refrigerant is circulated instead.

In order to circulate the refrigerant, a refrigerant compressor that compresses the refrigerant and a heat exchanger that exchanges heat with carbon dioxide in the distillation tank 401 and the storage tank 150 will be required. The high-temperature, high-pressure refrigerant compressed by the refrigerant compressor will supply heat to the distillation tank 401, and the cooled refrigerant while circulating will take heat from the storage tank 150.

Energy use can be reduced by using a refrigerant compressor with a smaller capacity and size than the CO ₂ compressor 290 that compresses carbon dioxide. It can prevent carbon dioxide and refrigerant from mixing with each other, or carbon dioxide from meeting oil or foreign substances in the refrigerant compressor. In other words, only carbon dioxide will move through pipes where carbon dioxide always moves.

Figure 5(c) shows a case where the clothing treatment apparatus 1000 described in the present disclosure further includes a recovery unit 280 for recovering gaseous carbon dioxide remaining in the pressure vessel (or washing chamber, 200) after the distillation step. It shows. As shown in FIG. 5(b), when using a thermosiphon, the existing clothing treatment device can use the CO ₂ compressor 290 even in the recovery stage, whereas the clothing treatment paper 1000 described in the present disclosure uses the CO ₂ compressor. Since there is no (290), a separate component is needed to recover the gas remaining in the pressure vessel after the distillation step.

The recovery unit 280 can also liquefy the gaseous carbon dioxide using a refrigerant that exchanges heat with the gaseous carbon dioxide.

The compressor that compresses the refrigerant may be separately equipped with a distillation compressor 403 for distillation and a recovery compressor 283 for recovery.

Figure 6 schematically illustrates the circulation of refrigerant between the distillation tank 401 and the storage tank 150 during the distillation step in the clothing treatment apparatus of the present disclosure. Figure 7 schematically shows the movement of gaseous carbon dioxide, which exchanges heat with the refrigerant, from the distillation tank 401 to the storage tank 150 during the distillation step. Therefore, although FIGS. 6 and 7 are separated for convenience of explanation, the circulation of the refrigerant and the vaporization, movement, and liquefaction of carbon dioxide will occur simultaneously in the distillation step.

Referring to Figure 6, it shows the circulation path of the refrigerant used in the washing and rinsing steps to distill carbon dioxide mixed with foreign substances. That is, Figure 6 shows the circulation path of the refrigerant in the distillation step of distilling the liquid carbon dioxide discharged from the pressure vessel 200 to the distillation tank 401.

While the distiller provided in a typical clothing treatment device compresses carbon dioxide and uses it to exchange heat, the clothing treatment device 1000 of the present disclosure includes a pressure vessel 200 that maintains the carbon dioxide contained therein at a pressure greater than atmospheric pressure, A storage tank 150 for storing carbon dioxide to supply carbon dioxide to the pressure vessel 200, and a storage tank 150 for storing carbon dioxide discharged from the pressure vessel 200 to separate foreign substances dissolved in the carbon dioxide discharged from the pressure vessel 200. It includes a distillation tank 401 for storage.

In order to utilize the thermosiphon phenomenon, the clothing treatment device 1000 includes a distillation heat exchanger 402 located inside the distillation tank 401 to exchange heat with carbon dioxide stored inside the distillation tank 401; A storage heat exchanger 152 located inside the storage tank 150 and exchanging heat with carbon dioxide stored inside the storage tank 150, the distillation heat exchanger 402, and the storage heat exchanger 152 are circulated. A distillation compressor 403 for compressing the refrigerant, and a distillation refrigerant flow path 660 connecting the distillation heat exchanger 402, the storage heat exchanger 152, and the distillation compressor 403 to form a passage through which the refrigerant circulates. ) may further be included.

Additionally, the clothing treatment apparatus 1000 may further include a distillation expansion unit 406 that expands the refrigerant that has passed through the distillation heat exchanger on the distillation refrigerant flow path. The distillation expansion unit 406 can cool the refrigerant through a throttling process. The distillation expansion unit 406 may be a capillary-shaped pipe bent into a circle. Alternatively, the distillation expansion unit 406 may be an electronic expansion valve (EEV) for controlling the flow rate of refrigerant.

In addition, the clothing treatment device 1000 connects the distillation tank 401 and the storage tank 150, and moves the gaseous carbon dioxide stored inside the distillation tank 401 to the storage tank 150. It may further include a pipe 610. Through this, the carbon dioxide vaporized in the distillation tank 401 will be moved through the storage pipe 610 and then liquefied in the storage tank 150 to store liquid carbon dioxide.

When the gaseous carbon dioxide moves from the distillation tank 401 to the storage tank 150, a separate driving source is not required. This is because when the temperature inside the distillation tank 401 increases through heat exchange with the refrigerant, the internal pressure of the distillation tank 401 becomes higher than the internal pressure of the storage tank 150. Therefore, gaseous carbon dioxide will naturally move from the distillation tank 401 to the storage tank 150. Additionally, in the storage tank 150, gaseous carbon dioxide is liquefied through heat exchange with the refrigerant, so the pressure of the storage tank 150 will be lowered. And, as liquid carbon dioxide is vaporized in the distillation tank 401, the water level will decrease, which will overheat the vaporized gaseous carbon dioxide and further increase the internal pressure of the distillation tank.

Accordingly, the control unit 900 can stop the operation of the distillation compressor 403 when the internal pressure of the distillation tank 401 becomes higher than the preset critical pressure. Preferably, the critical pressure can be set to 50 bar.

The refrigerant will circulate along the distillation refrigerant flow path 660 between the distillation tank 401 and the storage tank 150. The distillation refrigerant flow path 660 is a first circulation pipe that connects the distillation compressor 403 and the distillation heat exchanger 402 and moves the refrigerant compressed in the distillation compressor 403 to the distillation heat exchanger 402. (661), the distillation heat exchanger 402 and the distillation expansion unit 406 are connected to heat-exchange the refrigerant with the carbon dioxide stored in the distillation tank 401 in the distillation heat exchanger 402 to be transferred to the distillation expansion unit 406. ), connecting the distillation expansion unit 406 and the storage heat exchanger 152 to transfer the cooled refrigerant through the distillation expansion unit 406 to the storage heat exchanger 152. The third circulation pipe 663, which moves to the storage heat exchanger 152, and the distillation compressor 403 are connected to heat exchange the refrigerant with the carbon dioxide stored in the storage tank 150 in the storage heat exchanger 152. It may include a fourth circulation pipe 664 that moves to the distillation compressor 403.

In other words, by using the distillation compressor 403 that compresses the refrigerant instead of the separate CO ₂ compressor 290, the size of the compressor can be reduced, and by changing the movement path of the refrigerant and carbon dioxide, oil, impurities, and carbon dioxide are removed from the compressor. There will be no mixing.

The refrigerant may be a refrigerant used in a typical heat pump or refrigerator. For example, the refrigerant may be Freon gas, R-134a, or R-290.

Relatively high-temperature and high-pressure refrigerant will pass through the first circulation pipe 661 and the second circulation pipe 662, through which the refrigerant moves after passing the distillation compressor 403, and the refrigerant passing through the distillation expansion unit 406 will pass therethrough. Relatively low-temperature, low-pressure refrigerant will pass through the third circulation pipe 663 and fourth circulation pipe 664, through which the refrigerant moves.

Accordingly, the temperature of the refrigerant passing through the second circulation pipe 662 will be higher than the temperature of the refrigerant passing through the third circulation pipe 663. Additionally, the temperature of the refrigerant passing through the distillation heat exchanger 402 will be higher than the temperature of the refrigerant passing through the storage heat exchanger 152.

In addition, the temperature of the refrigerant passing through the distillation heat exchanger 402 during the distillation process will be higher than the temperature of the carbon dioxide stored in the distillation tank 401, and the temperature of the refrigerant passing through the storage heat exchanger 152 will be higher than the temperature of the storage tank ( 150) will remain higher than the temperature of the stored gaseous carbon dioxide.

Through this, vaporization and liquefaction of carbon dioxide occurs due to heat exchange with the refrigerant, and eventually, gaseous carbon dioxide will naturally move from the distillation tank 401 to the storage tank 150 by the thermosiphon phenomenon.

Preferably, the distillation heat exchanger 402 is located inside the distillation tank 401 and at the bottom of the distillation tank 401, and the storage heat exchanger 152 is located inside the storage tank 150 to It may be located at the top of the tank 401. This is because the purpose of the distillation heat exchanger 402 is to vaporize liquid carbon dioxide, while the purpose of the storage heat exchanger 152 is to liquefy gaseous carbon dioxide.

Figure 7 schematically shows the movement of gaseous carbon dioxide, which exchanges heat with the refrigerant, from the distillation tank 401 to the storage tank 150 during the distillation step.

As the refrigerant circulates between the distillation tank 401 and the storage tank 150, heat is released from the distillation tank 401 through the distillation heat exchanger 402 and the storage heat exchanger 152, and the storage tank 150 Tank 150 will absorb heat. Accordingly, the liquid carbon dioxide stored in the distillation tank 401 will be vaporized, and the gaseous carbon dioxide stored in the storage tank 150 will be liquefied.

To this end, the clothing treatment device 1000 connects the distillation tank 401 and the storage tank 150, and moves the gaseous carbon dioxide stored inside the distillation tank 401 to the storage tank 150. It may further include a pipe 610. In addition, a storage control valve 615 that opens and closes the storage pipe 610 may be further included on the storage pipe 610. The control unit 900 not only operates the distillation compressor 403 in the distillation step to purify the refrigerant, but also opens the storage control valve 615 to move gaseous carbon dioxide from the distillation tank 401 to the storage tank 150. will be.

Preferably, the storage pipe 610 may connect the upper part of the distillation tank 401 and the upper part of the storage tank 150. This is because gas must be moved in the distillation tank 401, and if the lower part of the storage tank 150 is connected, heat may be transferred to the unnecessarily stored liquid carbon dioxide, causing the liquid carbon dioxide to vaporize. It is also to maintain a stable liquid carbon dioxide level.

Figure 7 shows that the storage pipe 610 can be combined with the first supply pipe 621 used to supply gaseous carbon dioxide from the storage tank 150 to the pressure vessel 200 at point A. An example is shown in which the storage pipe 610 and the first supply pipe 621 are connected to the pressure vessel 200 through the shared pipe 680. However, this is only an example, and the storage pipe may be connected in other ways as long as the vaporized gaseous carbon dioxide can ultimately move from the distillation tank 401 to the storage tank 150.

Referring to FIG. 7, a first supply control valve 625 that opens the first supply pipe 621 may be located on the first supply pipe 621. Therefore, the control unit 900 opens the storage control valve 615 and the first supply control valve 625 to allow gaseous carbon dioxide to flow from the distillation tank 401 to the storage tank 150 through the storage pipe 610. It can be moved to . Other valves, such as the shared piping control valve 6801, will be closed.

Alternatively, the storage pipe 610 may directly connect the distillation tank 401 and the storage tank 150 to move gaseous carbon dioxide from the distillation tank 401 to the storage tank 150. As explained through FIGS. 6 and 7, the clothing treatment apparatus 1000 according to the present disclosure has a refrigerant circulation path and a carbon dioxide movement path that are separated from each other, thereby preventing oil or other impurities from entering the carbon dioxide.

Figure 8 shows a recovery step for recovering gaseous carbon dioxide remaining in the pressure vessel 200 after the distillation step is completed and before the washing cycle is completed.

The recovery step refers to a step of recovering gaseous carbon dioxide remaining in the pressure vessel 200 prior to ending the washing cycle. This is because although all liquid carbon dioxide has been discharged from the pressure vessel 200 and gone through the distillation step, a significant amount of gaseous carbon dioxide still remains in the pressure vessel 200.

To this end, the clothing treatment apparatus 1000 may further include a recovery unit 280 located above the pressure vessel 200, which circulates and liquefies the gaseous carbon dioxide stored in the pressure vessel 200. The recovery unit 280 is located outside the pressure vessel 200, and is located in a recovery passage 284 for circulating gaseous carbon dioxide in the pressure vessel 200, and is located in the recovery passage 284 to recover the gaseous carbon dioxide. It may include a recovery heat exchange unit 281 that exchanges heat with the gaseous carbon dioxide passing through the flow path 284 to liquefy the gaseous carbon dioxide.

Accordingly, the clothing treatment apparatus 1000 of the present disclosure may be separately equipped with a recovery cycle for recovering gaseous carbon dioxide and a distillation cycle for distillation to separate foreign substances from carbon dioxide.

The recovery heat exchanger 281 may include a first heat exchanger 2811 that functions as an evaporator, and a second heat exchanger 2812 that functions as a condenser. The first heat exchanger 2811 and the second heat exchanger 2812 may be finned tube heat exchangers provided with heat conductive fins in the radial direction of the pipe. \

In addition, the clothing processing device 1000 is located in the recovery passage 284 and includes a recovery body 2843 that accommodates the recovery heat exchanger 281 and stores carbon dioxide liquefied after passing through the recovery heat exchanger 281. More may be included.

In addition, a recovery compressor 283 that compresses and circulates the refrigerant to exchange heat with the gaseous carbon dioxide through the recovery heat exchange unit 281 and is located on the recovery passage 284 to collect gaseous carbon dioxide in the pressure vessel 200. It may further include a recovery fan 285 for circulation.

The recovery compressor 283 may be located outside the recovery body 2843. The recovery fan 285 may be positioned to meet gaseous carbon dioxide inside the recovery body 2843 after passing through the recovery heat exchanger 281, or may be positioned to meet before passing through the recovery heat exchanger 281. .

In addition, it may further include a recovery refrigerant passage 2831 that circulates the refrigerant compressed in the recovery compressor 283, and a recovery expansion unit 286 provided outside the recovery body to expand the refrigerant through a throttling process. there is. The recovery expansion unit 286 may be a capillary tube-shaped pipe or an electronic expansion valve.

Through the recovery refrigerant passage 2831, the refrigerant cooled in the recovery expansion unit 286 passes through the first heat exchanger 2811, and exchanges heat with gaseous carbon dioxide passing through the first heat exchanger 2811. , the gaseous carbon dioxide can be liquefied. And, the refrigerant that has passed through the first heat exchanger (2811) will be compressed through the recovery compressor (283). The refrigerant passing through the recovery compressor 283 will exchange heat with gaseous carbon dioxide passing through the second heat exchanger 2812 and transfer heat to the gaseous carbon dioxide.

The recovery fan 285 can suck in gaseous carbon dioxide from the pressure vessel 200 and circulate it back to the pressure vessel 200 through the recovery body 2843.

The recovery passage 284 is a recovery suction pipe 2841 that introduces gaseous carbon dioxide from the pressure vessel 200 into the recovery body 2843, and discharges gaseous carbon dioxide from the recovery body 2843 to the pressure vessel 200. It may include a recovery discharge pipe 2842.

The recovery body 2843 is provided in the form of a duct and may include a first heat exchanger 2811 and a second heat exchanger 2812 therein. A recovery fan 285 may also be provided inside the recovery body 2843. Additionally, liquefied carbon dioxide may be collected in the lower part of the recovery body 2843 through the first heat exchanger.

The recovery suction pipe 2841 connects the recovery body 2843 to the upper part of the storage tank 150 and the front of the first heat exchanger (based on the direction of movement of gaseous carbon dioxide). Preferably, one wash cycle is performed. It will be connected to the recovery body at a location higher than the maximum level of liquefied carbon dioxide that can be collected in the recovery body.

The recovery discharge pipe 2842 will also connect the recovery body to the upper part of the storage tank 150 and the rear of the second heat exchanger 2812.

The clothing treatment device 1000 is located between the pressure vessel 200 and the distillation tank 401, and includes a recovery tank 289 for storing the liquefied carbon dioxide and a recovery tank 289 for moving the liquefied carbon dioxide. Flow path 284: A first recovery pipe 2891 connecting the recovery tank 289, a first recovery valve located on the first recovery pipe 2891 and opening and closing the first recovery pipe 2891 ( 2891a) may further be included.

In addition, the clothing treatment device 1000 uses a second recovery pipe 2892 connecting the recovery tank 289 and the distillation tank 401 to move gaseous carbon dioxide among the carbon dioxide stored in the distillation tank 401. And a second recovery valve (2892a) located on the second recovery pipe (2892) to open and close the second recovery pipe (2892), to move liquid carbon dioxide among the carbon dioxide stored in the recovery tank (289). A third recovery pipe 2893 connecting the recovery tank 289 and the distillation tank 401, and a third recovery pipe 2893 located on the third recovery pipe 2893 and opening and closing the third recovery pipe 2893. It may further include a recovery valve (2893a).

First, in the recovery step, the recovered and liquefied carbon dioxide may be temporarily stored in the lower part of the recovery body. In addition, liquid carbon dioxide temporarily collected in the recovery body 2843 in the recovery step may be moved to the recovery tank 289 through the first recovery pipe 2891 and stored.

In the recovery stage, the control unit 900 not only operates the recovery compressor 283 and the recovery fan 285, but also opens the first recovery valve 2891a to move the liquefied gaseous carbon dioxide to the recovery tank.

The reason why the recovery tank 289 is located between the pressure vessel 200 and the distillation tank 401 based on the bottom of the cabinet is that the recovery tank 289 is stored in the recovery tank 289 using the height difference without a separate driving source. This is to discharge liquid carbon dioxide into the distillation tank.

Likewise, the recovery body 2843 may be located higher than the recovery tank 289 relative to the floor of the cabinet.

The reason why the recovery body 2843 is not directly connected to the distillation tank 401 is because the pressure of the distillation tank 401 is large and liquid carbon dioxide or gaseous carbon dioxide may flow back into the directly connected pipe.

For example, after discharging liquid carbon dioxide from the pressure vessel 200, the pressure of the pressure vessel may drop from 40 bar to 10 bar. When the recovery unit 280 is operated at 10 bar, 60 to 70% of the amount of gaseous carbon dioxide remaining in the pressure vessel 200 at 10 bar can be liquefied and recovered. .

Figure 9 shows the recovered CO ₂ discharge step of discharging the liquid carbon dioxide stored in the recovery tank 289 to the distillation tank 401 after the recovery step.

The height at which the recovery tank 289 is located may be higher than the height at which the distillation tank 401 is located. However, the internal pressure of the distillation tank 401 is higher than the internal pressure of the recovery tank 289. Therefore, liquid carbon dioxide cannot be discharged from the recovery tank 289 to the distillation tank 401 simply by using the height difference.

To solve this problem, the clothing treatment device 1000 uses a second recovery pipe connecting the recovery tank 289 and the distillation tank 401 to move gaseous carbon dioxide among the carbon dioxide stored in the distillation tank 401. (2892) and a second recovery valve (2892a) located on the second recovery pipe (2892) to open and close the second recovery pipe (2892), to move liquid carbon dioxide among the carbon dioxide stored in the recovery tank (289). To this end, a third recovery pipe 2893 connects the recovery tank 289 and the distillation tank 401, and is located on the third recovery pipe 2893 to open and close the third recovery pipe 2893. It may include a third recovery valve 2893a.

The control unit 900 closes the first recovery pipe 2891 and opens the second recovery pipe 2892 and the third recovery pipe 2893, so that the liquid carbon dioxide stored in the recovery tank 289 is stored in the storage tank ( 150), it can be moved without a separate driving source.

The second recovery pipe 2892 is used to move gaseous carbon dioxide to equalize the pressures of the recovery tank 289 and the distillation tank 401. And the third recovery pipe can move the liquid carbon dioxide from the recovery tank 289 to the distillation tank 401 according to the height difference without a separate driving source.

Figure 10 is a flow chart showing the main steps of the laundry process using a clothing processing device. When the user selects a washing course, the control method of the present invention proceeds with the pressurization preparation step (S50). In the pressurization preparation step (S50), the control method of the present invention opens the vacuum control valve 687 and operates the vacuum pump 297 to remove air contained in the pressure vessel 200. This is because if air remains in the pressure vessel 200 and contains moisture, the washing power of carbon dioxide on clothes may be reduced. Through this, the internal pressure of the pressure vessel 200 can be maintained lower than atmospheric pressure, preferably close to a vacuum state.

When the pressurization preparation step (S50) is completed, the control method of the present invention opens the first supply control valve 625 to allow gaseous carbon dioxide stored in the storage tank 150 to enter the pressure vessel 200 through the first supply pipe. ) will be moved to The control method of the present invention can open the first supply control valve 625 until the pressure of the storage tank 150 and the pressure vessel 200 reaches the equilibrium pressure (or flat pressure). 6 to 9, the control unit 900 must supply gaseous carbon dioxide through the first supply pipe 621 and the shared pipe 680, so the first supply control valve 625 and The shared piping control valve (6801) will be opened. This is called the pressurization step (S100).

When the pressurization step (S00) is completed, the control method of the present invention opens the supplementary tank 155 to replenish the insufficient carbon dioxide. The reason why there is a shortage while reusing carbon dioxide is because carbon dioxide that is not recovered even in the above-mentioned recovery step is vented to the outside (S900).

To this end, the controller controls the supplementary tank control valve 688 to open the supplementary pipe 683 to supply the insufficient carbon dioxide to the pressure vessel 200. 6 to 9, the supplementary pipe 683 is connected to the shared pipe 680, so the control method of the present invention includes the supplementary tank control valve 688 and the shared pipe control. By opening the valve 6801, carbon dioxide can be moved from the supplementary tank 155 to the pressure vessel 200.

Afterwards, the control method of the present invention can move liquid carbon dioxide from the storage tank 150 to the pressure vessel 200 (S200). This uses gravity and allows movement without a separate driving source. To this end, the controller 900 will control the second supply control valve 626 to open the second supply pipe 622.

After liquid carbon dioxide is supplied to the pressure vessel 200, the control method of the present invention rotates the drum 300 provided inside the pressure vessel at a preset first rotation speed to reduce the friction between the liquid carbon dioxide and clothing. Using this, a washing step (S300) of separating foreign substances from clothing can be performed. The washing step (S300) may be performed for a preset first time.

After the cleaning step (S300) is completed, the control method of the present invention can proceed to a first discharge step (S350) in which the liquid carbon dioxide used inside the pressure vessel 200 is discharged to the distillation tank 401.

The first discharge step (S350) is discharged using the height difference between the pressure vessel 200 and the distillation tank 401. For this purpose, the control unit 900 controls the discharge control valve 635 to discharge the discharge pipe. (630) can be opened. At this time, in order to eliminate the pressure difference between the pressure vessel 200 and the distillation tank 401, the control unit 900 opens the shared piping control valve 6801 and the storage control valve 615 to remove gaseous carbon dioxide from the pressure vessel. can be moved from the pressure vessel 200 to the distillation tank 401.

When the first discharge step (S300) is completed, the control method of the present invention can proceed to the first distillation step (S400) of heat exchange with a refrigerant for removing impurities from the liquid carbon dioxide stored in the distillation tank 401. Since the first distillation step (S400) is the same as the above-described distillation step, detailed information has been omitted.

Briefly, the control unit 900 operates the distillation compressor 403 that circulates the refrigerant, thereby circulating the refrigerant between the distillation tank 401 and the storage tank 150. Through heat exchange with the refrigerant, liquid carbon dioxide can be vaporized in the distillation tank 401 and gaseous carbon dioxide can be liquefied in the storage tank 150. The control unit 900 opens the storage control valve 615 and the first supply control valve 625 to move carbon dioxide vaporized in the distillation tank 401 to the storage tank 150 through the storage pipe. .

When the first distillation step (S400) is completed, the control method of the present invention will proceed with a liquid CO ₂ supply step (S500) for rinsing in which the distilled liquid carbon dioxide is supplied back to the pressure vessel 200. The liquid CO ₂ supply step for rinsing (S500) is the same as the liquid CO ₂ supply step for washing (S200). That is, the control unit 900 will control the second supply control valve 626 to open the second supply pipe 622.

After liquid carbon dioxide is supplied to the pressure vessel 200, the control method of the present invention rotates the drum 300 provided inside the pressure vessel at a preset second rotation speed (or rinse rotation speed) to produce liquid carbon dioxide. A rinsing step (S600) to separate foreign substances from the clothing can be performed by using the friction between the clothing and the clothing. The rinsing step (S600) may be performed for a preset second time.

And when the rinsing step (S600) is completed, the control method of the present invention can proceed to a rinsing discharging step (S650) and a rinsing distillation step (S700) similar to the first discharging step (S350) and the first distillation step (S400). . The controller may control each valve as in the first discharge step (S350) and the first distillation step (S400).

To ensure removal of foreign substances, the liquid CO2 supply step for rinsing (S500), the rinsing step (S600), the rinsing discharge step (S650), and the rinsing distillation step (S700), denoted SA, may be repeated multiple times. Preferably it can be repeated twice.

When the rinsing distillation step (S700) is completed, the control method of the present invention can proceed to a recovery step (S800) in which gaseous carbon dioxide remaining in the pressure vessel 200 is recovered using the recovery unit 280.

In the recovery step (S800), the control unit 900 compresses and circulates the refrigerant using the recovery compressor 283, circulates gaseous carbon dioxide using the recovery passage 284, and exchanges heat with the refrigerant in the recovery heat exchange unit 281. Through this, the gaseous carbon dioxide remaining in the pressure vessel 200 is circulated and liquefied.

Then, the liquefied carbon dioxide will be moved from the recovery passage 284 to the recovery tank 289 and stored in the recovery tank 289. To this end, the controller 900 can control the first recovery valve 2891a to open the first recovery pipe 2891 and move the liquefied carbon dioxide to the recovery tank 289.

When the recovery step (S800) is completed, the control method of the present invention can proceed with the recovered CO ₂ discharge step (S900) in which liquid carbon dioxide is discharged from the recovery tank 289 to the storage tank 150. The control unit 900 opens the second recovery valve 2892a and the third control valve () to transfer gaseous carbon dioxide to the recovery tank 289 through the second recovery pipe 2892 and the third recovery pipe 2893, respectively. and liquid carbon dioxide can be moved to the distillation tank 401.

Additionally, the control unit 900 can discharge the remaining unrecovered gaseous carbon dioxide to the outside by controlling the purge valve 298 to open the purge pipe 681.

The present disclosure may be modified and implemented in various forms, and its scope is not limited to the above-described embodiments. Therefore, if the modified embodiment includes elements of the claims of the present disclosure, it should be regarded as falling within the scope of the present disclosure.

1000: Clothing processing device 100: Cabinet 103: Front panel
1031: Cabinet inlet 110: Frame 130: Door
150: storage tank 152: storage heat exchanger 160: cooler
200: pressure vessel 280: recovery unit 281: recovery heat exchange unit
300: Drum 400: Distillation unit 402: Distillation compressor
401: distillation tank 402: distillation heat exchanger 500: driving unit
610: storage pipe 900: control unit

Claims (19)

A pressure container including a container inlet that can be opened and closed at the front and maintaining the carbon dioxide contained therein at a pressure greater than atmospheric pressure;
a storage tank for storing carbon dioxide to supply carbon dioxide to the pressure vessel;
a distillation tank storing carbon dioxide discharged from the pressure vessel to separate foreign substances dissolved in the carbon dioxide discharged from the pressure vessel;
a recovery passage located outside the pressure vessel and circulating gaseous carbon dioxide in the pressure vessel; and
a recovery heat exchanger located in the recovery passage, and exchanging heat with the gaseous carbon dioxide passing through the recovery passage to liquefy the gaseous carbon dioxide;
A recovery tank where liquefied carbon dioxide is stored;
a first recovery pipe that is provided to connect the recovery passage and the recovery tank and moves carbon dioxide liquefied in the recovery heat exchange unit to the recovery tank; and
A first recovery valve provided in the first recovery pipe to open and close the first recovery pipe. According to paragraph 1,
A recovery body located in the recovery passage to accommodate the recovery heat exchanger and storing carbon dioxide liquefied after passing through the recovery heat exchanger; A clothing processing device further comprising: delete According to paragraph 1,
a recovery compressor that compresses and circulates refrigerant to exchange heat with the gaseous carbon dioxide through the recovery heat exchanger; and
A clothing treatment device further comprising a recovery fan located in the recovery passage and circulating gaseous carbon dioxide in the pressure vessel. According to paragraph 1,
At least a portion of the storage tank is located above the pressure vessel, and the front-to-back length of the storage tank is longer than the vertical length of the storage tank,
At least a portion of the distillation tank is located lower than the pressure vessel, and a front-to-back length of the distillation tank is longer than a vertical length of the distillation tank. According to paragraph 1,
a second recovery pipe connecting the recovery tank and the distillation tank to move gaseous carbon dioxide among the carbon dioxide stored in the distillation tank;
a second recovery valve located on the second recovery pipe and opening and closing the second recovery pipe;
a third recovery pipe connecting the recovery tank and the distillation tank to move liquid carbon dioxide among the carbon dioxide stored in the recovery tank; and
A third recovery valve located on the third recovery pipe to open and close the third recovery pipe. According to any one of paragraphs 1, 2, and 4 to 6,
A distillation heat exchanger located inside the distillation tank and exchanging heat with carbon dioxide stored inside the distillation tank;
a storage heat exchanger located inside the storage tank and exchanging heat with carbon dioxide stored inside the storage tank;
a distillation compressor for compressing the refrigerant circulating through the distillation heat exchanger and the storage heat exchanger; and
Clothing treatment device further comprising: a distillation refrigerant flow path connecting the distillation heat exchanger, the storage heat exchanger, and the distillation compressor to form a flow path through which the refrigerant circulates. In clause 7,
The distillation heat exchanger is
Located at the bottom of the distillation tank inside the distillation tank,
The storage heat exchanger is
A clothing treatment device, characterized in that it is located on top of the distillation tank inside the storage tank. In clause 7,
A clothing treatment device further comprising a distillation expansion unit that expands the refrigerant that has passed through the distillation heat exchanger on the distillation refrigerant flow path. According to clause 9,
The distilled refrigerant flow is
a first circulation pipe connecting the distillation compressor and the distillation heat exchanger to move the refrigerant compressed in the distillation compressor to the distillation heat exchanger;
a second circulation pipe connecting the distillation heat exchanger and the distillation expansion unit to move the refrigerant that has exchanged heat with carbon dioxide stored in the distillation tank in the distillation heat exchanger to the distillation expansion unit;
a third circulation pipe connecting the distillation expansion unit and the storage heat exchanger to move the cooled refrigerant through the distillation expansion unit to the storage heat exchanger; and
A fourth circulation pipe connecting the storage heat exchanger and the distillation compressor to transfer the refrigerant that has exchanged heat with the carbon dioxide stored in the storage tank in the storage heat exchanger to the distillation compressor. According to clause 10,
Clothing treatment device, characterized in that the temperature of the refrigerant passing through the second circulation pipe is higher than the temperature of the refrigerant passing through the third circulation pipe. According to clause 11,
Clothing treatment device, characterized in that the temperature of the refrigerant passing through the distillation heat exchanger is higher than the temperature of the refrigerant passing through the storage heat exchanger. In clause 7,
The clothing treatment device further includes a storage pipe that connects the distillation tank and the storage tank and moves gaseous carbon dioxide stored inside the distillation tank to the storage tank. According to clause 13,
The storage pipe is
A clothing treatment device, characterized in that connecting the upper part of the distillation tank and the upper part of the storage tank. According to paragraph 1,
A clothing treatment device, characterized in that the storage tank, the pressure vessel, and the distillation tank are provided in a cylindrical shape. delete According to paragraph 1,
a cabinet accommodating therein the storage tank, the pressure vessel, the distillation tank, the recovery passage, the recovery heat exchanger, the recovery tank, the first recovery pipe, and the first recovery valve; It further includes,
Clothing treatment device, characterized in that at least one of the storage tank or the distillation tank is located closer to either side of the cabinet than the pressure vessel.
A pressure container including a container inlet that can be opened and closed at the front and maintaining the carbon dioxide contained therein at a pressure greater than atmospheric pressure; a drum rotatably provided inside the pressure vessel to accommodate clothing; a storage tank for storing carbon dioxide to supply carbon dioxide to the pressure vessel; a distillation tank storing carbon dioxide discharged from the pressure vessel to separate foreign substances dissolved in the carbon dioxide discharged from the pressure vessel; a recovery passage located outside the pressure vessel and circulating gaseous carbon dioxide in the pressure vessel; a recovery heat exchanger located in the recovery passage, and exchanging heat with the gaseous carbon dioxide passing through the recovery passage to liquefy the gaseous carbon dioxide; A recovery tank where liquefied carbon dioxide is stored; a first recovery pipe that is provided to connect the recovery passage and the recovery tank and moves carbon dioxide liquefied in the recovery heat exchange unit to the recovery tank; and a first recovery valve provided in the first recovery pipe to open and close the first recovery pipe.
A rinsing step of rotating the drum at a preset rotational speed to separate foreign substances using friction between the liquid carbon dioxide supplied from the storage tank and the clothing;
A discharge step of discharging the liquid carbon dioxide used in the pressure vessel into the distillation tank upon completion of the rinsing step; and
The gaseous carbon dioxide remaining in the pressure vessel is liquefied by heat exchange with a recovery passage that circulates outside the pressure vessel and a recovery heat exchanger located on the recovery passage, and then stored in a recovery tank located between the pressure vessel and the distillation tank. A control method of a clothing processing device including a recovery step. According to clause 18,
After the discharge step, the liquid carbon dioxide stored in the distillation tank is vaporized and moved to the storage tank through heat exchange with the distillation heat exchanger located in the distillation tank, and the gas stored in the storage tank is transferred to the storage tank through heat exchange with the storage heat exchanger located in the storage tank. A method of controlling a clothing treatment device further comprising a distillation step of liquefying carbon dioxide.