JP2003245489A - Washing and drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a calorific value from being reduced by suppressing reaching of spattered water generated during heat exchange to a heater. <P>SOLUTION: This washing and drying machine is provided in order with: a heat exchanger 35 having a water cooling means 39; and a blower 36 and a heater 37 at the downstream of it. Between the case 38 of the heat exchanger 35 and the blow-out side of the blower 36, a bypass 51 for collecting the water spattered and entered from the heat exchanger 35 is formed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer / dryer capable of efficiently drying using a heat exchanger.

[0002]

2. Description of the Related Art Conventionally, a drum type washer / dryer as shown in FIG. 12 is known as a washer / dryer having a heat exchanger of this type. A schematic configuration thereof will be described. In a rectangular casing 1 forming an outer shell, a cylindrical drum 2 supported by a horizontal horizontal axis as a rotary tank is provided, and is housed in the drum 2 and is not shown. The laundry is designed so that it can be carried out in order, from washing to drying. This drum 2 has an opening 3 formed in the front surface, has a large number of through holes 4 in the other rear surface and the peripheral side surface, and has a plurality of baffles 5 (only one is shown) inwardly on the peripheral side surface. It is protruding. A cylindrical water tank 6 is arranged so as to surround the entire drum 2, and the water tank 6 also has an opening 7 formed in the front surface thereof, but the drum 2 is substantially non-perforated in the housing 1. It is configured to be elastically supported coaxially with. A drive motor 8 is mounted on the back side of the water tank 6, and its rotation shaft 9 penetrates the rear portion of the water tank 6 and is directly connected to the internal drum 2, so that the drum 2 is rotatable in the water tank 6. Supported.

A circulation path 10 is formed so as to surround the water tank 6 from the rear side to the upper side, and is connected to the front and rear ends of the water tank 6, respectively. This circuit 10
Inside, a heat exchanger 11 having water cooling means is provided on the back side of the water tank 6. This heat exchanger 11
Is connected to the circulation path 10 through a hollow cylindrical container case 12, and a water injector 13 as a water cooling means is arranged in the upper inside of the case 12. This water injector 13
Water (tap water) supplied through a water supply valve (not shown) during the dry operation is poured downward from the upper part inside the body case 12, and is agitated and mixed with circulating air that is exhaust air, which will be described later in detail. The heat exchange due to the contact with each other is positively and efficiently performed, thereby improving the drying performance. An air blower 14 for generating and supplying hot air for drying into the drum 2 through the water tank 6 and a heater device 15 are sequentially provided in the upper portion on the downstream side communicating with the heat exchanger 11.

However, the air blower 1 is used during the drying operation.
4, and the hot air generated by the heater device 15 is supplied from the front of the water tank 6 and the rotating drum 2 as indicated by arrow D in the figure, contributes to the drying action of the laundry (not shown), and Is discharged from the drum 2 in a large amount and is sent to the heat exchanger 11 from the rear end of the water tank 6. In this heat exchanger 11, so-called exhaust air flows upward from the lower part inside the body case 12, and is again heated and heated by the blower device 14 and the heater device 15. The circulating air before being hot-aired at this time is in a warm air state containing a large amount of moisture as exhaust air and rises in the vessel case 12, whereas from the upper portion, the water-cooling means from the water injector 13 is supplied. The mixture is agitated and mixed so as to collide with the injected water (cooling water), and so-called cooling water and hot air efficiently contact each other.

As a result, the exhaust air is cooled, the moisture contained in the air is condensed and flows down, and is discharged to the outside of the machine through the drain port 16 at the bottom of the water tank 6 and the drain valve 17 in the open state. On the other hand, the air dehumidified by the heat exchanger 11 is sent to the hot air generating means of the air blower 14 and the heater device 15 to be efficiently turned into hot air, and is supplied into the drum 2 from the front inside the water tank 6, so-called. The circulating air flows and circulates in the direction of arrow D in the circulation path 10 via the water tank 6 while repeating the dehumidifying and heating actions. Further, as a result, the humidity after contributing to the drying is not discharged to the outside of the machine, so that the laundry can be comfortably dried indoors.

[0006]

However, in the heat exchanger 11 having the water cooling means, the dehumidified circulating air can be efficiently turned into hot air by the heat exchange.
As the cooling water from the water injector 13 in 2 is agitated by the exhaust air, it becomes fine mist-like water that is rolled up and scattered as water droplets and flows with the circulating air, and further passes through the blower 14 and further. It tends to be carried to the heater device 15 located downstream. In this case, the amount of heat generated by the heater device 15 decreases due to the splashed water that has entered, which leads to a decrease in drying performance such as a longer drying time.

In particular, in this type of heat exchanger 11, the amount of heat exchange (performance) for dehumidification is determined by the amount of injected water, and further, the amount of circulating air and the heating output are greatly affected. The larger the value, the higher the performance can be expected, but the amount of scattered mist-like water tends to be generated, and therefore the desired improvement in performance cannot be expected.
As a countermeasure, for example, the body case 12 of the heat exchanger 11
Although it is possible to increase the flow passage area, it is not easy for a home washer / dryer that requires a compact design that always requires a small installation space, and there is a problem that it is naturally disadvantageous in terms of cost. .

The present invention has been made in view of the above circumstances, and therefore an object thereof is to prevent moisture, which is generated and scattered in a heat exchanger, from reaching the heater device, and is more efficient in drying. It is to provide a washer / dryer that can be expected to improve performance.

[0009]

In order to achieve the above object, a washing and drying machine of the present invention has a casing forming an outer shell, a water tank disposed inside the casing, and an inside of the water tank. A heat exchanger having a rotary tank rotatably disposed in the interior, a circulation path formed to communicate with the water tank through the water tank, and a water cooling means in a hollow case body arranged upstream of the circulation path. And a blower device and a heater device that are sequentially provided on the downstream side of the heat exchanger, wherein the heat exchange is performed between the body case of the heat exchanger and the blowing side of the blower device. It is characterized in that a bypass passage is formed for collecting water that has scattered and invaded from the container (the invention of claim 1).

According to this structure, since the scattered water can be collected from the bypass passage before reaching the heater device, it is possible to effectively prevent the water from reaching the heater device, and to suppress the decrease in the amount of heat generation. Therefore, it is expected that the drying performance will be improved by shortening the drying time based on the hot air volume based on the effective heating temperature. It is also advantageous in that it can be executed without reducing the amount of cooling water for effectively performing heat exchange, and that efficient dehumidification performance can be expected.

According to a first aspect of the present invention, a guide portion for guiding the scattered water to the bypass passage is provided on the inner wall surface of the blower unit on the outlet side (Claim 2).
Invention).

According to this structure, the scattered water in a wide range can be guided to the bypass passage, and can be effectively captured and collected, and further improvement of the drying performance can be expected.

Further, in the second aspect of the present invention, the guide portion is constituted by a concave groove portion (invention of the third aspect).

According to this structure, the moving water can be guided to the bypass passage while collecting the water in the groove, and the water can be captured and collected with a more specific and simple structure.

Further, in the second aspect of the present invention, the guide portion is constituted by a convex rib (invention of the fourth aspect).

According to this structure, an effect equivalent to that of the invention of claim 2 can be expected.

Further, in the apparatus according to claim 1, the blower is provided with an auxiliary cooler for water cooling (the invention of claim 5).

According to this structure, the moisture reaching the blower can be dehumidified again by heat exchange in the auxiliary cooler, and the moisture can be effectively recovered.

The blower according to claim 1 is characterized in that it is provided with a radiation fin for air cooling (the invention of claim 6).

According to this structure, it is possible to expect the same operational effect as the above-mentioned claim 5 by utilizing the radiation fins.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment, in which the present invention is applied to a drum type washer / dryer, will be described below with reference to FIGS. Of which, Figure 1
2 and FIG. 2 are a side view showing a schematic configuration of the entire drum type washer / dryer with a part thereof broken away and a plan view with a top plate removed. The overall configuration is outlined based on these drawings. A laundry entrance / exit 22 is formed at a substantially central portion of a front plate 21a forming a rectangular housing 21 forming a door, and a door 23 that allows the entrance / exit 22 to open and close is rotatably provided.

A water tank 24 is provided inside the housing 21. The water tank 24 has a substantially cylindrical shape,
The water tank 24 is substantially non-perforated except that the water tank 24 has a large opening 24a in the front surface and is arranged in a substantially horizontal horizontal axis with its axial direction slightly rising forward. The elastic support device 25 is capable of storing the amount of water at the water level of, and the lower part thereof is a pair of left and right (only one is shown in FIG. 1)
Is elastically supported by.

Inside the water tank 24, a drum 26 is disposed as a rotatable rotary tank coaxially with the water tank 24 in this embodiment. That is, the drum 26 is supported around a slightly inclined horizontal horizontal axis, accommodates laundry (not shown) inside, and functions as a rotary tub shared for washing operation, dehydration operation and drying operation. There are a large number of through holes 26b in the body and the rear wall other than the large opening 26a on the front surface, and a plurality of baffles 26c for scraping laundry on the inner peripheral surface of the body (1 in FIG. 1). Only one is shown). Each of the openings 24a, 26a of the water tank 24 and the drum 26 is opened to face the laundry inlet / outlet port 22, and the opening 24a of the water tank 24 is connected to the laundry inlet / outlet port 22 by the cylindrical bellows 27. Watertight connection.

A drive motor 28, which is a drive device for rotating the drum 26, is disposed in the center of the rear surface of the rear wall of the water tank 24. This drive motor 2
Reference numeral 8 denotes, for example, an outer rotor type, in which an inner stator 28a is attached and fixed to a rear wall portion of the water tank 24, and a rotary shaft 29 directly connected to the outer rotor 28b is watertightly penetrated into the water tank 24, The rear wall of the drum 26 is fixedly connected to the front end of the drum 26. A concave portion 30 protruding downward is formed at the lowest portion of the inner bottom surface of the water tank 24. A warm water heater 31 for heating washing water is provided in the concave portion 30, and the concave portion 30 is provided. A drain hose 33 is communicatively connected to a rear portion of the water tank via an electric drain valve 32.
The washing water inside can be drained.

On the other hand, a circulation path 34 is provided so as to surround the water tank 24 from the rear, which is the outer periphery of the water tank 24, to the upper front end portion. The circulation path 34 has a lower end, one end of which is in communication with a lower portion of the rear wall of the water tank 24, and a heat exchanger 35, which will be described later, which is an upper end of the heat exchanger 35. A blower device 36, which will be described later, and a heater device 37, which will be described later, are respectively provided in the circulation path 34.
The front end of the water tank 24 communicates with the front opening 24a of the water tank 24. Thus, the circulation path 34 is configured to be in communication with each other via the water tank 24, and the circulation air dehumidified by the heat exchanger 35 (details will be described later) is supplied to the blower device 36 and the heater device 37 as hot air generating means. After being heat-aired, the water tank 24
The air is blown from the front inside and is supplied to the inside of the drum 26, and the flow of the circulating air such as hot air is shown by the arrow A in FIG.

First, the structure of the heat exchanger 35 will be described. Specifically, a vertically elongated hollow cylindrical container body case 38 is communicatively connected to the circulation path 34.
The water injection device 39 as a water cooling means is provided in the upper part of the inside of 8. The water injector 39 has a plurality of water spray holes (not shown), is arranged in the upper part of the housing 21, communicates with the water supply valve 40 through the water injection pipe 39a, and is directed downward in the device case 38. It is configured to be able to inject water in a sprinkled state. In addition, a diffusing plate 41 protruding inward is provided at a lower portion of the body case 38.
Is formed, which receives the water from the water injector 39 and collides with the circulating air in the counterflow (direction of arrow A) to further enhance the diffusive mixing with the water.

However, the water supply valve 40 has a solenoid valve-type valve structure connected to a water supply source such as a water supply and can be switched to a plurality of stages, and in addition to the water injection pipe 39a, as shown in FIG. 42a is connected, and the water supply pipe 42a is connected for communication with a water supply case 42 for supplying water into the water tank 24. Although not shown, the water supply case 42 has a detergent storage portion and a softer storage portion so that detergent and the like can be poured so as to flow in response to the water supply operation.

Next, the basic structure of the blower 36 will be described. This is a spiral fan case 44 containing a blower fan 43, and a blower fan 43.
And a fan motor 46 that is rotationally driven via a belt transmission mechanism 45 including a pulley. The drive shaft of this fan motor 46 is provided with a cooling fan 47 for cooling the motor 46 by blowing air. The heat exchanger 35 is connected to the suction port 44a of the fan case 44, while the heater device 37 is connected to the discharge port 44b. The heater device 37 is a sheathed heater 48.
Is provided with a heater case 49 inside.

Further, a specific structure of the blower 36 will be described with reference to FIGS. 3 is an enlarged plan view of the blower device 36, and FIG. 4 is a front view of the outlet 44b of the fan case 44 to which the heater case 49 is connected. The outlet 50 is provided laterally near the outlet 44b. Are integrally formed and project outside the fan case 44.
A tube pipe 51 is connected to the discharge port 50, and the other end is also the upper end of the heat exchanger 35.
Is connected in the vicinity of the suction port 44a. Therefore,
The tube pipe 51 is formed as a so-called bypass passage that short-circuits the upper portion of the body case 38 of the heat exchanger 35 and the blowout side of the blower 36.

In addition, on the lower surface near the outlet 44b,
For example, a plurality of concave groove portions 52 are formed. As shown in FIG. 3, one end of the groove portion 52 is continuous with the discharge port 50, and the other end is radially branched to form the blower fan 4.
3 has a shape that extends linearly to the vicinity of the outer peripheral end portion, and is arranged in a direction substantially orthogonal to the so-called circulating air flow arrow A direction. It should be noted that an operation circuit section 53 having a switch, a display circuit, and the like in response to the user's setting operation of various driving courses is provided in the upper front part of the housing 21 shown in FIG. A control unit 54 is provided, and the control unit 54 has a microcomputer and various drive circuits, and automatically controls the overall driving course and the like in response to the setting operation.

Next, the operation of the washer / dryer having the above structure will be described. First, a general description will be given below assuming that a user's desired driving course is set, for example, a general "standard course" is selectively set. When the operation is started, after washing, rinsing, and dehydrating the laundry (not shown), the progress of the drying process is controlled by the control unit 54 based on a program stored in advance. Among them, in the washing process, the water supply valve 40 is opened to supply the washing water (tap water) into the water supply case 42 from the side of the water supply pipe 42a, and is poured into the water tank 24 together with a detergent (not shown). When a water level sensor (not shown) or the like detects that a predetermined amount of water has been supplied, and when the warm water heater 31 finishes warming the water to a predetermined temperature, the drive motor 28 is activated and the drum 26 containing the laundry is Is rotated at a low speed (for example, 45 rpm). Along with this, the laundry which has been moistened with the detergent liquid as the washing water in the drum 26 is repeatedly scraped up by the baffle 26c and then dropped, and the impact force is used for so-called tap washing. Done on time.

In the next rinsing step, only tap water as clean washing water is supplied from the water supply valve 40 to the water supply pipe 42 in the same manner as above.
Water is supplied into the aquarium 24 via a and the water supply case 42,
The drum 26 is rotated at a predetermined water level by the drive motor 28 at a low speed, whereby the laundry in the drum 26 is rinsed by tapping and washing in the same manner as the above-described washing step. Repeated times. Next, when shifting to the dehydration step, the drum 26 is rotated at a high speed by the drive motor 28, whereby the water contained in the laundry is centrifugally discharged from the through hole 26b to the water tank 24 side by a centrifugal force, and the drain valve 32 at the bottom portion. And drain hose 33
It is drained to the outside of the machine through the.

When the final drying process is started, the drum 26 is rotated at a low speed by the drive motor 28, and the water supply valve 40 opens only on the water injection pipe 39a side and is supplied to the water injector 39. Therefore, the water is poured in a shower form from the water injector 39, which is the water cooling means of the heat exchanger 35, and the water falls from the upper part of the container case 38 downward or flows down along the inner wall surface. On the other hand, the blower device 36 and the heater device 37, which constitute the hot air generating means arranged in the circulation path 34, are also energized and driven to heat the air into hot air. The hot air that has passed through the heater device 37 is supplied from the openings 24a and 26a on the front surface of the water tank 24 and the drum 26 as shown by an arrow A in FIG. 1, and is blown against the laundry in the drum 26. And contact with the agitated laundry to remove moisture and dry.

The still-warm air containing the evaporated water that contributes to the drying action is discharged to the water tank 24 side through the through hole 26b of the drum 26, and is discharged from the lower rear portion of the water tank 24 as exhaust air. Then, the circulating air, which is the exhaust air, is taken into the heat exchanger 35 and dehumidified, is then again heated by the blower device 36 and the heater device 37, and is repeatedly supplied to the water tank 24 and the drum 26. , Until the desired dryness is obtained.

However, the exhaust air that has reached the heat exchanger 35 rises (in the direction of arrow A) so as to be taken in from the lower part of the body case 38 and sucked by the upper air blower 36. The exhaust air is agitated and mixed with the water by colliding against this soaring air current, so-called cooling water from the water injector 39. As a result, the warm air containing moisture (exhaust air) is sufficiently cooled by contact with cooling water, and this heat exchange causes the moisture to condense and drip to be drained through the drain valve 32 and dehumidified. It

In this embodiment, since the diffuser plate 41 is provided in the lower inside of the body case 38, the diffuser plate 4
The wind speed in the vicinity of 1 is increased, and the cooling water that flows down is rolled up to further promote stirring and mixing, and heat exchange performance can be enhanced. Thus, in the drying process, after the circulating air is dehumidified as described above, it can be heated and heated to a predetermined temperature in a short time and can be efficiently dried.

However, during the heat exchange of the exhaust air as described above,
Particularly light mist-like water among water droplets generated by diffusion mixing may be rolled up together with the ascending air current and may be sucked into the blower device 36 or the heater device 37 side further downstream. It appears remarkably as the amount of water for cooling is increased or the hot air generating means is improved to increase the heating temperature and the air flow rate.
In this case, as described above, the amount of heat generated by the sheathed heater 48 is reduced due to the water that has been scattered and penetrated, and performance improvement such as shortening the drying time cannot be expected so much.

In the present embodiment, however, a tube tube is used as a bypass passage that short-circuits the upper part of the heat exchanger 35 on the suction port 44a side from the vicinity of the blowout port 44b of the fan case 44 on the blowing side of the blower 36. 51 is provided. Of these, the suction side of the blower device 36 is the blower fan 4
While the static pressure becomes negative with the rotation of 3, on the blow-out side immediately before the heater device 37, the static pressure is substantially equal to the atmospheric pressure.
A pressure difference is generated at both ends of the tube tube 51. This means that a part of the circulating air sent to the heater device 37 is
As shown by an arrow B in the figure, it is discharged from the outlet 50 on the outlet side, flows into the body case 38 of the heat exchanger 35 through the tube pipe 51, and a part of so-called circulating air is recovered. .

As a result, the water contained in the circulating air, that is, the fine water that has been scattered up by the cooling water and the like, reaching the air blower 36, is also discharged due to this pressure difference.
It flows in so as to be drawn to 0. In this case, the mist-like water flows in the air or flows by adhering to the inner wall surface of the fan case 44 to cause dew condensation, flows into the discharge port 50, and is discharged through the tube pipe 51. Therefore, just before the scattered water reaches the heater device 37, it is collected again in the heat exchanger 35 on the upstream side, and the invasion of the water into the sheathed heater 48 can be reduced as much as possible.

In addition, in particular, in this embodiment, the outlet 44b
In the vicinity, a plurality of concave groove portions 52 that are directed toward the discharge port 50 and linearly extend in a direction orthogonal to the air flow (direction of arrow A) are formed. As a result, even with respect to the water flowing in the portion separated from the discharge port 50, the water can be effectively collected and captured in the groove portion 52 and can be efficiently collected. Therefore, the groove portion 52 can collect the water from the discharge port 50 by the tube. Tube 51
It functions as a guiding part that leads to. Since the water is collected in the upper part of the case body 38, which is the heat exchanger 35, through the tube pipe 51 serving as a bypass passage, the collected water can be reused for the heat exchange action as cooling water for the exhaust air.

The above embodiment has the following effects.
In a washer / dryer equipped with a heat exchanger 35, the dehumidification performance of the heat exchanger 35 has a great influence on the improvement of the drying performance. A large factor is the amount of water (cooling water) from the water injector 39 for heat exchange with. However, conventionally, the cooling water that is agitated and mixed at the time of heat exchange is sucked into the blower device 36 so as to be wound up in the circulating air flow, and further reaches the downstream heater device 37 to reduce the heat generation amount. I had grief.

On the other hand, in this embodiment, a tube pipe 51, which is a bypass, is provided in communication between the body case 38 of the heat exchanger 35 and the blowout side of the blower 36, and the pressure difference between them is set. By utilizing this, it is possible to effectively collect the water that has scattered and invaded into the air blower 36. As a result, it is possible to effectively prevent the moisture from reaching the heater device 37, and to suppress the decrease in the amount of heat generation. Therefore, efficient dehumidification performance can be expected without reducing the amount of cooling water in the heat exchanger 35. It is expected that the drying performance will be improved by shortening the drying time based on the hot air volume based on the effective heating temperature. In addition, in particular, as disclosed in FIG. 3, a groove 52 for guiding the flowing water to the discharge port 50, that is, for guiding the flowing water to the tube pipe 51 is provided on the lower surface of the inner wall of the fan case 44, which is the blowing side of the blower 36. It was As a result, the water flowing through the portion distant from the discharge port 50 can be effectively collected and captured, and the collection efficiency can be further improved and the drying performance can be further improved.

It is preferable that the groove portion 52 extends in a direction intersecting with the flow of the circulating air in order to trap water, but it is not limited to a straight line shape, but may be an arc shape, or may be a plurality of pieces.
The number may be one, and further, the configuration can be variously changed by forming the fan case 44 around the inner wall surface on the outlet side. Further, although the pressure difference between the front and rear ends of the blower device 36 is used for recovering the moisture, the present invention is not limited to this, and the discharge port 50 may be provided at the lowest portion of the fan case 44, for example, and the water may be discharged by a drop. .

(Modifications) FIGS. 5 and 6 are views corresponding to FIGS. 3 and 4, showing modifications related to the first embodiment. This is different in that, for example, one convex rib 55 is provided so as to project from the groove portion 52 which is the guiding portion in the above-described embodiment, and is otherwise common. Therefore,
According to such a configuration, the rib 55 has a function of catching the flow of water so as to block it and guiding it to the discharge port 50. Therefore, similar to the above-described embodiment, the drying performance is improved. Play. Needless to say, the position and shape of the rib 55 can be changed in various ways.

In contrast to the above-described embodiment, FIGS. 7 to 11 disclose the second embodiment of the present invention together with a modification. The same parts as those in the first embodiment are designated by the same reference numerals and their description is omitted. However, only different parts will be described below.

(Second Embodiment) First, FIGS. 7 and 8 are views corresponding to FIG. 3 and FIG. 4 showing a second embodiment, and in the above-described embodiment, the blower unit 36 is provided with a guide portion. On the other hand, this one is different in that an auxiliary cooler 56 for water cooling is provided, and the rest of the configuration is common. That is, the cooling pipe 57 made of metal is arranged in a meandering shape on the upper surface of the outer wall of the fan case 44, which is the blowing side of the blower 36, and the silicone grease 58 as a high heat conductive member is filled in the surroundings and the meandering gap. Fill and fix with appropriate mounting means. Then, in order to allow cooling water such as tap water to pass through the cooling pipe 57, for example, a water supply path to a water cooling means of a heat exchanger (not shown) is branched and connected to the cooling pipe 57 in the direction of arrow C. It is said that water can flow. This allows the fan case 44 to be used during the dry operation.
The circulating air that has reached the outlet side is cooled by the cooling pipe 57 in a water-passing state, and this functions as a so-called auxiliary cooler.

According to the above construction, however, the circulating air containing mist-like water generated during the heat exchange with the exhaust air in the drying process is still a warm airflow to the air blower 36, so that it is a fan case. It is cooled by a cooling pipe 57 which is arranged on the outlet side of 44 and is in a water passing state.
Therefore, the water is condensed and drops or condenses, and the discharge port 5
It flows in so as to be drawn to 0, and is returned and recovered via a tube pipe 51 to an upstream heat exchanger (not shown).

Moreover, in this embodiment, since the periphery of the cooling pipe 57 is attached to the fan case 44 so as to be embedded with the silicon grease 58 which is a highly heat conductive member, heat is directly and effectively transferred. The heat transfer area of the cooling pipe 57 can be increased, and the dehumidification performance by heat exchange can be improved accordingly. Therefore, it is possible to expect an efficient drying operation, such as suppressing the decrease in the amount of heat generated by dehumidifying and collecting water from the circulating air immediately before reaching the heater device 37, and making it possible to heat effectively the heating temperature in a short time.

(Modification) Next, FIGS. 9 to 11 show modifications related to the so-called auxiliary cooler 56 relating to the second embodiment. FIG. 9 is a view corresponding to FIG. 1 and FIGS. Are equivalent views of FIGS. 3 and 4, respectively. In particular, in the second embodiment, the water-cooling type auxiliary cooler 56 is provided, whereas the air-cooling type heat radiation fins 59 are provided to quickly radiate the heat in the circulating air to the outside. It was done like this.

That is, for example, on the upper surface of the outer wall of the fan case 44 of the blower device 36 on the blow-out side, metal heat radiation fins 59 are provided.
When the fan case 44 is made of resin, for example, it is provided by insert molding to improve heat transfer and heat dissipation. In the present embodiment, the air cooling means, which is an air cooling type, is originally a fan motor 46.
It is advantageous that the cooling fan 47 for cooling is used to effectively use the blowing of air in the outward direction, and the cooling fan 47 is located relatively close to the radiation fin 59.

According to the above construction, during the drying operation, even if the warm circulating air containing the scattered water reaches the blower device 36, it is radiated by the radiation fins 59 formed on the blowing side of the fan case 44. The heat exchanged moisture is cooled and condensed, and is recovered from the discharge port 50 to the heat exchanger side (not shown) through the tube pipe 51, and the like, and substantially the same effect as the auxiliary cooler 56 of the above-described embodiment is obtained. However,
The present invention is not limited to the above-mentioned position where the heat radiation fins 59 are formed and the configuration for the cooling fan 47 for air cooling. For example, a dedicated cooling fan is provided on the rotation shaft side of the blower fan 43, or inside the housing 21. Various embodiments can be developed such as an air-cooling unit having a dedicated motor provided on the upper portion.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings. For example, the present invention is not limited to a drum type washer / dryer provided with a horizontal shaft type rotary tank (drum), and is not limited to the vertical type. A washer / dryer provided with a shaft-shaped rotary tub may be used, and it is also effective to appropriately combine the above-mentioned respective embodiments, and it is possible to appropriately change them within a range not departing from the gist of the present invention. .

[0053]

As is apparent from the above description, in the washer / dryer of the present invention, a bypass path is formed between the body case of the heat exchanger and the blow side of the blower to form the blower. It is possible to collect the scattered water that has reached. As a result, it is possible to effectively prevent the moisture from reaching the heater device further downstream, and it is possible to suppress the phenomenon of a decrease in the amount of heat generation, and it is expected that the drying performance is improved, such as shortening the drying time. In addition, the amount of water for cooling, which has a large effect on heat exchange performance, can be dealt with without reducing it, providing a washer / dryer advantageous for improving drying performance, such as efficient hot air generation based on good dehumidification performance. it can.

[Brief description of drawings]

FIG. 1 is a side view showing a schematic configuration of a drum type washer / dryer as a whole according to a first embodiment of the present invention with a part thereof cut away.

FIG. 2 is a plan view showing the top plate portion of the housing removed.

FIG. 3 is an enlarged plan view of a main part.

FIG. 4 is a front view of the main part.

FIG. 5 is a view corresponding to FIG. 3 showing a modified example.

FIG. 6 is a view corresponding to FIG.

FIG. 7 is a diagram corresponding to FIG. 3 showing a second embodiment of the present invention.

FIG. 8 is a view corresponding to FIG.

9 is a view equivalent to FIG. 1 showing a modified example.

FIG. 10 is a view corresponding to FIG.

FIG. 11 is a view corresponding to FIG.

FIG. 12 is a view corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

21 is a housing, 24 is a water tank, 26 is a drum (rotating tank), 3
4 is a circulation path, 35 is a heat exchanger, 36 is an air blower, 37 is a heater device, 38 is a body case, 39 is a water injector (water cooling means), 44 is a fan case, 47 is a cooling fan, and 50 is an outlet. , 51 is a tube pipe (bypass passage), 52 is a groove portion (guide portion), 55 is a rib (guide portion), 56 is an auxiliary cooler, 57 is a cooling pipe, 58 is silicon grease, and 59 is a heat radiating fin.

Claims (6)

[Claims] 1. A housing forming an outer shell, a water tank arranged inside the housing, a rotary tank rotatably arranged inside the water tank, and a communication formed through the water tank. A circulation passage, a heat exchanger having water cooling means in a hollow vessel case arranged upstream of the circulation passage, and a blower device and a heater device sequentially provided on the downstream side of the heat exchanger. The washing machine characterized in that a bypass passage for collecting the water splashed from the heat exchanger is formed between the body case of the heat exchanger and the blowing side of the blower. Dryer. 2. The washer / dryer according to claim 1, wherein the blower side inner wall surface is provided with a guide portion for guiding the scattered water to the bypass passage. 3. The washer / dryer according to claim 2, wherein the guide portion is constituted by a concave groove portion. 4. The washer / dryer according to claim 2, wherein the guide portion is constituted by a convex rib. 5. The washing / drying machine according to claim 1, wherein the air blower is provided with an auxiliary cooler for water cooling. 6. The washer / dryer according to claim 1, wherein the air blower is provided with a radiation fin for air cooling.