CN108625091B

CN108625091B - Washing and drying machine

Info

Publication number: CN108625091B
Application number: CN201810011106.XA
Authority: CN
Inventors: 小池裕之; 渡边光; 曾我丈; 菅原道太; 绵引伸一; 高田健太郎
Original assignee: Hitachi Global Life Solutions Inc
Current assignee: Hitachi Global Life Solutions Inc
Priority date: 2017-03-21
Filing date: 2018-01-05
Publication date: 2020-07-21
Anticipated expiration: 2038-01-05
Also published as: JP6670783B2; TWI660088B; TW201835414A; CN108625091A; JP2018153522A

Abstract

The invention provides a washing and drying machine which can prevent the temperature of the washings from excessively rising under the condition of heating the washings such as a heat-labile blanket, can protect the washings from being influenced by heat and can effectively kill mites. The washing machine performs a heating process of supplying warm air into the washing tub, and performs a cooling process of supplying water into the washing tub by the water supply mechanism to cool the laundry.

Description

Washing and drying machine

Technical Field

The present invention relates to a washing and drying machine capable of washing blankets, bedclothes and the like.

Background

In order to clean blankets and bedclothes that are frequently in direct contact with human skin, washing, drying in the sun, suction with a vacuum cleaner, and the like are generally performed. The excrement and corpse of the mites can be removed by washing and cleaning, but the mites are not easy to die when washed, dried in the sun, and the mites attached to the thick fiber of the blanket and the bedding are not easy to absorb.

For the most indoor mites of the family dust mites, experimental results are disclosed which are thermolabile and 100% dead by keeping temperatures above 50 ℃ for 20 minutes.

Patent document 1 describes a washing machine having such a function of killing mites by heat. Patent document 1 describes "a washing machine with a sterilizing and acaricidal function, which includes a washing tub for storing laundry and cleaning the laundry, and a steam generation mechanism or a hot water supply mechanism for supplying steam to the washing tub, wherein the steam generation mechanism or the hot water supply mechanism is operated during a period from when the laundry is put into the washing tub to when water is supplied, supplies steam or hot water to the laundry from above the washing tub, and thereafter starts a normal washing process. ".

Documents of the prior art

Patent document 1: japanese patent No. 2639045

Although sterilization and killing of mites are carried out by steam and hot water, the permeation effect of steam is hardly expected in the inner and lower portions of the folded blanket and bedding.

Further, a general blanket is made of chemical fibers such as acrylic and polyester, and has a characteristic of being weak to heat, so that the fibers themselves are deformed by steam and hot water to be hard in texture.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a washing and drying machine which can prevent the temperature of laundry from excessively rising when the laundry such as a felt which is not heat-resistant is heated, thereby protecting the laundry from heat and efficiently killing mites.

In order to achieve the above object, a washing and drying machine according to the present invention includes: a box body; an outer tub supported in the cabinet and storing washing water therein; a washing tank rotatably supported in the outer tank about a vertical axis and accommodating laundry; a driving part for rotating the washing tank; a blowing mechanism for supplying air into the washing tank; a heating mechanism for heating air supplied to the washing tank; a water supply mechanism for supplying water into the washing tank; and a control means for controlling the air blowing means, the heating means, and the water supply means, wherein the control means performs a heating process of supplying warm air into the washing tub, and performs a cooling process of supplying water into the washing tub by the water supply means to cool the laundry when performing the heating process.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, when laundry such as a felt which is not heat-resistant is heated, the temperature of the laundry is suppressed from excessively rising, and the laundry is protected from heat, and mites can be efficiently killed.

Drawings

Fig. 1 is a longitudinal sectional view showing the construction of a washing and drying machine of an embodiment of the present invention.

Fig. 2 is a functional block diagram of a washing and drying machine according to an embodiment of the present invention.

Fig. 3 is a basic control flowchart of the mite countermeasure program according to the embodiment of the present invention.

Fig. 4 is a basic control flowchart of a mite countermeasure program according to another embodiment of the present invention.

Fig. 5 is a control flowchart of the heating and humidifying process according to the embodiment of the present invention.

FIG. 6 is a temperature profile of a felt according to an embodiment of the present invention.

Fig. 7 is a control flowchart of the heating and humidifying process according to another embodiment of the present invention.

In the figure:

1-outer frame (box), 2-outer groove, 3-sink, 6-rotating vane, 8-drive arrangement (drive division), 9-control division, 17-heater (heating mechanism), 19-forced draught blower (air supply mechanism), 20-water cooling dehumidification board (water cooling dehumidification mechanism), 21-warm braw temperature sensor, 22-circulation temperature sensor, 27-atomizer (water mist spraying mechanism), 28-fog net (micronization part, water mist spraying mechanism).

Detailed Description

Hereinafter, a washing and drying machine according to an embodiment of the present invention will be described with reference to the drawings. The following embodiments are merely examples embodying the present invention, and do not limit the technical scope of the present invention.

(example 1)

The following description is made in accordance with the procedure of fig. 1, 2, 3, 4, 5, 6, and 7.

Fig. 1 is a longitudinal sectional view showing a configuration of a washing and drying machine of an embodiment of the present invention, and fig. 2 is a functional block diagram of the washing and drying machine of the embodiment of the present invention.

An outer tub 2 for storing washing water is disposed in an outer frame 1 of the washing and drying machine, and the outer tub 2 is supported in a vibration-proof manner by four suspension members (not shown) hanging from four corners of an upper end of the outer frame 1 and is disposed at a central portion in the outer frame 1 in a vertical direction. The washing tub 3 disposed in the outer tub 2 is formed in a bottomed cylindrical shape that is long in the axial direction using a stainless steel plate. A through hole 7 for water passage and ventilation is formed in the peripheral wall of the washing tub 3.

A rotary blade 6 for stirring the laundry to perform a washing operation, a rinsing operation, a drying operation, and the like is rotatably provided at the center of the inner bottom surface portion in the washing tub 3. The rotary blade 6 is driven to rotate by a drive device 8, and performs a washing operation, a rinsing operation, a drying operation, and the like by repeating normal rotation and reverse rotation. During the dehydration operation, the washing tub 3 and the rotary blade 6 rotate integrally at high speed, and the water contained in the laundry is dehydrated.

The drive device 8 incorporates a drive motor using a reversible capacitor split phase single phase induction motor, an inverter drive motor, and the like, an electromagnetically operated clutch mechanism, and a planetary gear reduction mechanism, and has a function of selectively executing the following modes by controlling the drive motor and the electromagnetically operated clutch mechanism: a stirring drive mode in which the rotary blade 6 is repeatedly rotated forward and backward (reciprocated) while the washing tub 3 is stationary; a dehydration drive mode in which the washing tub 3 and the rotary blade 6 are rotated integrally in the same direction; and a neutral drive mode in which washing tub 3 is not coupled to agitating blade 6, and washing tub 3 is rotated in the opposite direction by the reaction of agitating blade 6 when rotating it.

A circulation duct 18 connected to the outer tub 2 through an exhaust connection part 24 is provided at a rear side part in the outer frame 1, and a water-cooled dehumidifying plate 20 is provided in an air passage of the circulation duct 18, the water-cooled dehumidifying plate 20 being used for cooling and dehumidifying warm air containing moisture evaporated from laundry in a drying process by cooling water, and a lint filter (not shown) for removing lint and the like contained in the warm air being circulated is detachably provided. As indicated by hollow arrows, the flow of the warm air passes through the exhaust connection portion 24 from the outer tub 2, and is directed upward from below the circulation duct 18, and a blower 19 and a heater 17 for heating the cooled and dehumidified circulation warm air are provided at the front end thereof. The air heated by the heater 17 passes through the air supply duct 26, and the warm air is supplied to the washing tub 3. A mist net 28 formed by weaving fine metal wires into a net shape of a substantially hemispherical shape is attached to a supply port of the washing tub 3 to which warm air is supplied. Above the atomizing screen 28, the atomizing nozzle 27 projects downward into the air supply duct 26. When the tap water is supplied to spray nozzle 27, the tap water sprayed downward from spray nozzle 27 hits mist net 28, and the tap water is atomized (atomized) and sprayed into washing tub 3.

The mesh size of the mist net 28 is preferably larger than a water supply filter (not shown) provided inside the water supply hose connection port 10. This can prevent the mist net 28 from being clogged with garbage in the tap water. Further, since mist net 28 is disposed below spray nozzle 27, the water sprayed from spray nozzle 27 is accelerated by the gravitational acceleration and then hits mist net 28, thereby further promoting the water atomization.

A warm air temperature sensor 21 for detecting the temperature of the heated warm air is provided in the air blowing duct 26 to control the heating of the heater 17. A humidity sensor (not shown) for sensing the humidity of the circulating air is provided in the air duct.

The circulation duct 18 is provided with a circulation temperature sensor 22 for detecting the temperature of warm air discharged from the washing tub 3 and circulating in the circulation duct 18, and the exhaust connection portion 24 is provided with a drain temperature sensor 23 at a position where cooling water flows, and detects the temperature of the cooling water including condensed water condensed and collected by cooling.

The present invention can be used also in the following cases: the water temperature of the washing water or the rinsing water is detected by the circulation temperature sensor 22 or the drain temperature sensor 23, and the control contents of the washing step and the rinsing step are changed according to the detected water temperature.

The control unit 9 is configured mainly by the microcomputer 37.

The microcomputer 37 has a function of controlling the display panel 16, the water supply unit 11, and the water discharge valve 14. The motor 32 of the drive device 8 is driven and controlled via a motor drive circuit 31, the clutch mechanism 34 is switched via a clutch drive circuit 33, the heater 17 is controlled to be energized and to be turned on/off by controlling the heater switch 35, and the blower 19 is controlled via a fan drive circuit 36.

Fig. 3 is a basic control flowchart of the mite countermeasure program according to the embodiment of the present invention executed by the microcomputer 37 in the control unit 9.

When a power switch (not shown) is turned on, the microcomputer 37 executes the following control process.

Step S01

When the power is turned on, the initialization process of the control processing system is performed, and then the clutch mechanism 34 is controlled to the position at the start of washing, and when the drain valve 14 is not closed, the closing control is performed.

Step S02

The operation control process is executed when laundry is input into the washing tub 3, a carpet and a bed are input here, a program selection button (not shown) of the operation switch 30 is operated to perform initial setting, and a start button switch is pressed. In the initial setting herein, a program of a countermeasure against mites, which is an embodiment of the present invention, is selectively set.

Step S03

The main water supply solenoid valve (not shown) of the water supply unit 11 is opened to start the supply of the city water. The washing water supply is supplied until a set water amount is reached, the clutch mechanism 34 is controlled to a dewatering position, and the washing tub 3 and the rotary blade 6 are rotated integrally and in the same direction at a low speed to quickly suck water into blankets and beddings, which are the laundry.

Step S04

In a washing and drying machine having a washing tub 3 rotating about a vertical axis, tap water supplied up to a set water amount dilutes a detergent to a detergent concentration preferable in washing, and blankets and beddings as laundry are immersed in the washing liquid. In this state, the drive device 8 is controlled to selectively execute the following modes: the washing machine is configured to perform tank spin cleaning in which the washing tank 3 and the rotary blade 6 are rotated integrally in the spin-drying drive mode by the clutch mechanism 34, agitation cleaning in which the rotary blade 6 is rotated in the normal/reverse direction while the washing tank 3 is stationary in the agitation drive mode by the clutch mechanism 34, or tank blade cleaning in which the washing tank 3 is rotated in the reverse direction by the reaction of the rotation of the rotary blade 6 in the neutral drive mode by the clutch mechanism 34.

In the groove rotating cleaning, the mechanical cleaning device is suitable for cleaning without damaging blankets and bedding, but the mechanical cleaning force applied to the blankets and the bedding is small.

In the agitation washing, a mechanical washing force is applied only to the lower portion of the blanket or the bedding, and the blanket or the bedding is generally put into the washing tub 3 in a state of being put into a string bag for washing.

In the cleaning of the groove blades, the advantages of both the groove rotating cleaning and the stirring cleaning are achieved, and the proper mechanical cleaning force which does not damage the blankets and the bedding can be applied to the blankets and the bedding.

In a washing and drying machine having a washing tub 3 rotating about a horizontal axis or an inclined axis, instead of supplying tap water until a blanket or bedding as a laundry is immersed therein, the washing tub 3 is rotated in a forward/reverse direction to perform a tumble cleaning in which the blanket or bedding as a laundry is lifted up and dropped.

Step S05

The drain valve 14 is opened to discharge the washing liquid to the outside of the machine. In the washing and draining operation, the clutch mechanism 34 is controlled to the dewatering drive mode during or after the draining operation.

Step S06

After the completion of the drainage, the washing tank 3 is rotated at a high speed in one direction integrally with the rotary blade 6, whereby the washing liquid contained in the blanket or the beddings as the laundry is centrifugally removed.

Step S07

The drain valve 14 is closed and the main water supply solenoid valve of the water supply unit 11 is opened to supply the city water up to the set water amount.

Step S08

The drive device 8 is controlled to perform the rinsing 1 operation. In some cases, the rinsing 1 operation is skipped to shorten the operation time.

Step S09

The drain valve 14 is opened to discharge the rinse water to the outside of the machine. In the rinsing 1 drain operation, the clutch mechanism 34 is controlled to the dehydration drive mode in the middle of the drain.

Step S10

By rotating the washing tub 3 and the rotary blades 6 integrally in one direction at a high speed, rinse water contained in blankets and beddings, which are laundry, is centrifugally drained.

Step S11

The drain valve 14 is closed, and the control unit 9 controls the blower 19, the heater 17, and the driving device 8 to perform the heating and humidification processing.

Specifically, as shown in the flowchart of fig. 5, drive device 8 is controlled to rotate washing tub 3 at a low speed (step S501). Then, control unit 9 controls fan drive circuit 36 to operate blower 19 to supply air into washing tub 3 (step S502).

After that, the control unit 9 controls the heater switch 35 to be on, and performs the forced operation of the heater 17 (step S503). The blanket and the beddings as the laundry are heated by the warm air temperature sensor 21 provided in the air supply duct 26 until the warm air temperature reaches 80 ℃ or higher (step S504). When the warm air temperature sensor 21 detects that the warm air temperature exceeds 80 ℃, the controller 9 controls the water supply unit 11 to intermittently supply tap water from the spray nozzle 27 (step S505).

The water supply solenoid valve (not shown) for water mist of the water supply unit 11 can supply tap water of 0.2 to 0.5L to the spray nozzle 27 every minute, but in this embodiment, since it is necessary to maintain a temperature for preventing the felt of the blanket and the bedding as the washing from being hardened due to thermal deformation and for killing the mites, the water supply solenoid valve for water mist is turned on for 10 seconds and then turned off for 170 seconds, and this on/off time distribution is a control scheme, and the temperature of the blanket and the bedding as the washing can be prevented from excessively rising by setting for each washing and drying machine.

Until the temperature of the warm air circulating in the circulation duct 18 exceeds 50 ℃ is detected by the circulation temperature sensor 22 provided in the circulation duct 18, the heating and humidification of the blanket and the beddings as the laundry are continuously performed while intermittently spraying the mist (step S506).

When the circulation temperature sensor 22 detects that the circulation temperature exceeds 50 ℃, the control unit 9 turns off the water supply solenoid valve for the mist of the water supply unit 11 and stops the intermittent spraying of the mist (step S507). Thereafter, the control unit 9 controls the heater switch 35 to perform the weak operation of the heater 17 (step S508). At the same time as the start of the weak operation of the heater 17, the weak operation timer is started (step S509), and the weak operation is continued until 30 minutes have elapsed (step S510). This is because the treatment for keeping the blanket or the beddings as the laundry at a temperature of 50 ℃ or higher for 20 minutes for killing the mites corresponds to a case where the temperature of the lower part of the blanket or the beddings as the laundry put into the washing tub 3 rotating around the vertical axis is hard to rise. In a washing and drying machine having a washing tub 3 rotating about a horizontal axis or an inclined axis, since the position of a blanket or a bed as a washing object can be changed by rotating the washing tub 3, a weak operation can be skipped. After the weak operation timer has elapsed for 30 minutes, the control unit 9 turns off the heater switch 35 to stop the heating of the heater 17 (step S511). While the heating by the heater 17 is stopped, the blowing operation timer is started (step S512). The blower 19 is operated until 15 minutes elapses from the blowing operation (step S513), and after 15 minutes elapses from the blowing operation, the control unit 9 controls the fan drive circuit 36 to stop the operation of the blower 19 (step S514).

After stopping the blowing operation, control unit 9 controls drive device 8 to stop the rotation of washing tub 3 (step S515).

Step S12

The main water supply solenoid valve of the water supply unit 11 is opened to supply tap water up to a set water amount.

Step S13

The drive device 8 is controlled to perform the rinsing 2 operation.

Step S14

In the same manner as in step S09, the rinse water is discharged outside the machine.

Step S15

Similarly to step S10, rinse water contained in the carpet and the bedclothes as the laundry is centrifugally drained. Hereinafter, step S16, step S17, and step S18 are similarly executed, but these may be omitted as appropriate.

Step S19

The felt and the bedclothes as the laundry after the sufficient rinsing are sufficiently centrifugally dewatered in the final dewatering.

In fig. 4, the heating and humidifying process (step S11) is performed before the supply of wash water (step S03), but the basic control is the same as the flowchart of fig. 3.

Fig. 6 is a diagram schematically illustrating the temperature distribution of the felt, and the effect of the heating and humidifying treatment according to the present embodiment will be described using this diagram.

(a) The case where the finely divided water is not intermittently supplied into the washing tub 3 is shown, and the case where the heating and humidifying treatment of the present invention is performed is shown in (b).

The heater 17 is operated strongly in the section tA, the heater 17 is operated weakly in the section tB, and the blowing operation is performed with the heater 17 turned off in the section tC.

The temperature change of the carpet and the bedding as the laundry put into the washing tub 3 rotating around the vertical axis is such that the temperature change T1 is formed on the upper surface closer to the place to which the warm air is supplied, and exceeds 50 ℃ at the point a.

On the other hand, the temperature change such as temperature change T2 occurs in the lower part of washing tub 3, and the heating time to point B exceeding 50 ℃ is long. Therefore, in the temperature change T1, the temperature is rapidly increased as the heating is further continued from the point a and the moisture contained in the felt is reduced, and the temperature becomes the highest temperature at the point C, and the fibers of the felt are thermally deformed.

When the heating and humidifying process of the present embodiment is performed, tap water is intermittently supplied from spray nozzle 27 (line M) when the warm air temperature exceeds 80 ℃. This slows the temperature rise from point a, which is at a temperature higher than 50 ℃, on the upper surface closer to the location to which warm air is supplied. In the lower part of washing tub 3, temperature change T2 exceeds 50 ℃ at point B, and thereafter the temperature also continues to rise. In the interval tB in which the heater 17 is caused to perform the weak operation, the temperature change T1 rises substantially horizontally or slowly. The temperature does not exceed 60 ℃ in the heating and humidifying treatment of the present embodiment. On the other hand, the temperature change T2 continues to increase in the weak operation section tB, and also continues to slowly increase in the blowing operation section tC, so that the temperature can be maintained at 50 ℃ or higher for 20 minutes or longer.

According to the present embodiment described above, by appropriately cooling and humidifying the laundry, the temperature of the laundry can be prevented from excessively rising, and the mites can be efficiently killed by maintaining a constant temperature.

Further, by using the mist in the cooling treatment, a rapid temperature drop can be suppressed, and temperature control can be performed more appropriately.

(example 2)

While the intermittent spraying of the mist is started in the case where the warm air temperature is detected by the warm air temperature sensor 21 and the temperature exceeds 80 ℃ in the heating as in embodiment 1, the heating and humidifying treatment of the other embodiments is different in that the intermittent spraying of the mist is started instead after the heating is performed for a predetermined time.

Specifically, as shown in the flowchart of fig. 7, drive device 8 is controlled to rotate washing tub 3 at a low speed (step S501). Then, control unit 9 controls fan drive circuit 36 to operate blower 19 to supply air into washing tub 3 (step S502).

After that, the control unit 9 controls the heater switch 35 to be on, and performs the forced operation of the heater 17 (step S503). At the same time as the start of the forced operation of the heater 17, a forced operation timer is started (step S516), the number of blankets and beddings as the laundry is determined (step S516), and the heating time corresponding to the amount of the laundry is set.

A32 minute timer is started when the amount of laundry is small (step S517), and a 38 minute timer is started when the amount of laundry is large (step S518). The timer started is counted down, and heating of the blanket and the beddings as the laundry is continued until the timer becomes 0 (step S517).

When the set time has elapsed, control unit 9 controls water supply unit 11 to intermittently supply tap water from spray nozzle 27 (step S505).

Until the temperature of the warm air circulating in the circulation duct 18 exceeds 50 ℃ is detected by the circulation temperature sensor 22 provided in the circulation duct 18, the heating and humidification of the blanket and the beddings as the laundry are continued while spraying the water mist intermittently (step S506).

When the heating and humidifying processing of the present embodiment is performed, the heating time is selected according to the amount of the felt or the bedding as the laundry, and when the time elapses, the tap water is intermittently supplied from the spray nozzle 27, and the temperature rise of the upper surface of the laundry near the place where the warm air is supplied can be suppressed.

(example 3)

The heating and humidifying process according to the other embodiment is different in that, when the spray nozzle 27 and the mist net 28 are not provided as in embodiment 1 or embodiment 2, the main water supply solenoid valve of the water supply unit 11 is opened to supply tap water to cool and humidify laundry.

The main water supply solenoid valve of the water supply unit 11 can supply 10 to 15L of tap water per minute, but it is necessary to maintain the temperature for cooling the blanket and beddings as the laundry and killing the mites, and thus, the on/off time distribution is a control scheme for turning off 208 seconds after turning on 2 seconds.

(example 4)

There is no great difference in structure other than the washing and drying machine as the washing tub 3 rotating substantially around the horizontal axis or the inclined axis, and the heating and humidifying treatment of the present invention can be performed to cause mites to die.

In addition, in the case of the so-called vertical washing and drying machine including the rotary blade 6 as in example 1, for example, it is difficult to agitate blankets and beddings as the laundry, temperature unevenness of the laundry is likely to occur, and the cooling of the laundry in the heating and humidifying treatment described above becomes more effective.

Claims

1. A washing and drying machine is characterized by comprising:

a box body;

an outer tub supported in the cabinet and storing washing water therein;

a washing tank rotatably supported in the outer tank about a vertical axis and accommodating laundry;

a driving part for rotating the washing tank;

a blowing mechanism for supplying air into the washing tank;

a heating mechanism for heating air supplied to the washing tank;

a water supply mechanism for supplying water into the washing tank;

a control mechanism for controlling the air supply mechanism, the heating mechanism and the water supply mechanism; and

an air duct for circulating air in the washing tank,

the air duct is provided with: the heating mechanism described above; a first temperature detection means provided on the inlet side of the heating means with respect to the wind; and a second temperature detection means provided on the outlet side of the heating means with respect to the wind,

the control means performs a heating process of supplying warm air into the washing tub, performs a cooling process of supplying water into the washing tub by the water supply means to cool the laundry based on a detection result of the first temperature detection means when performing the heating process, and stops the cooling process based on a detection result of the second temperature detection means.

2. The washer dryer as recited in claim 1,

a water mist spraying mechanism for atomizing the water from the water supply mechanism and spraying the atomized water into the washing tank,

the control means performs a cooling process of supplying the atomized water into the washing tub by the mist spraying means to cool the laundry during the heating process.

3. The washer dryer as recited in claim 1,

and a rotary blade provided at the bottom of the washing tank.

4. The washer dryer as recited in claim 1,

the heating process is performed after the cleaning process and the rinsing process and before the water supply of the second rinsing process is started, and the second rinsing process and the dewatering process are performed after the heating process.

5. The washer dryer as recited in claim 1,

the heating process is performed before the water supply in the cleaning process is started, and the cleaning process, the rinsing process, and the dehydrating process are performed after the heating and humidifying process.