JP2006075417A - Drum type washing/drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing/drying machine which improves drying performance when the washing/drying machine has a structure for drying laundry by using a refrigeration cycle. <P>SOLUTION: A direct drive motor (DD motor) 11 for driving to rotate a rotary drum 4 is provided on the back surface part of a water tank 2. An air inlet 19 is provided at an upper part (a position higher than the highest water level at washing) of the front surface part of the water tank 2, and an exhaust outlet 20 is provided at a lower part (a position lower than the highest water level at washing) of the back surface part of the water tank 2. A casing 13 is disposed on a bottom plate 1a of an outer box 1 through a support member 12. A condenser 16 and a radiator 17 of the refrigeration cycle 14 are placed in the casing 13. An air circulation path 25 for circulating the air in a manner that the air heated by the condenser 16 is supplied in the water tank 2 from the air inlet, and the exhausted air discharged from the exhaust outlet 20 is heated by the condenser 16 after being cooled and dehumidified by the radiator 17 is provided. An annular duct 23 constituting a part of the air circulation path 25 on the side of the exhaust outlet 20 is disposed concentrically with the DD motor 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drum-type laundry dryer that dries laundry using a refrigeration cycle.

  2. Description of the Related Art Conventional drum-type laundry dryers have a configuration using a refrigeration cycle including a compressor, a condenser, a cooler, and the like for drying laundry. This drum type selective dryer was provided in the water tank after supplying air heated by a condenser as a heating source into the water tank from the air supply port provided in the front part of the water tank during the drying operation. Removes moisture from the laundry in the rotating drum, discharges it as exhaust from the exhaust port provided in the back of the aquarium, and circulates the exhaust so that it is cooled and dehumidified by a cooler as a cooling source and heated again by a condenser The air circulation path is configured to be provided.

In this case, the condenser and the evaporator, which are components of the refrigeration cycle, are heavy, and are installed on the bottom plate of the outer box. Further, during the washing operation, washing water is supplied to the set water level in the water tank, and washing is performed in which the laundry put in the rotating drum is agitated by rotating the rotating drum. For this reason, the intake and exhaust ports on the front and back sides of the aquarium are positioned above the maximum water level during washing of the aquarium so that washing water does not flow into the condenser and cooler side of the refrigeration cycle. (See, for example, Patent Document 1).
JP 2004-135715 A (FIG. 3)

In the conventional configuration, the air inlet and exhaust outlets of the front and rear portions of the aquarium are provided so as to be located above the highest water level during washing of the aquarium, so the air supplied from the intake vent into the aquarium Since (warm air) flows linearly in the upper part of the water tank toward the exhaust port, there is a problem that the contact with the laundry in the rotating drum is not sufficiently performed and the drying performance is lowered.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drum-type washing / drying machine capable of improving the drying performance even in a configuration in which drying is performed using a refrigeration cycle. is there.

  The present invention is provided in a water tub disposed in an outer box and having an intake port and an exhaust port, a rotating drum rotatably disposed in the water tub and storing laundry, and a bottom plate of the outer box. A refrigeration cycle having a compressor, a condenser as a heating source and a cooler as a cooling source, and air heated by the condenser is supplied into the water tank from the intake port, and the air discharged from the exhaust port is discharged. An air circulation path that is circulated so as to be heated again by the condenser after being cooled and dehumidified by the cooler, and the intake port or the exhaust port is provided at a position lower than the maximum water level during washing of the water tank. A part of the air circulation path on the intake port or exhaust port side provided at the lower position is provided at a position higher than the highest water level during washing.

  According to such a configuration, a part of the air circulation path on the intake port or exhaust port side provided at a position lower than the highest water level during washing is provided at a position higher than the highest water level during washing. Washing water can be prevented from flowing into the condenser and cooler side of the refrigeration cycle. Unlike the conventional case, the air (warm air) supplied from the intake port into the water tank does not flow linearly in the upper part of the water tank toward the exhaust port. To come into contact.

  The present invention has an excellent effect that it is possible to improve the drying performance even in a configuration where drying is performed using a refrigeration cycle.

(First embodiment)
The first embodiment of the present invention will be described below with reference to FIGS.
First, in FIG. 1, a water tank 2 is elastically supported by a plurality of support devices 3 in a horizontal state inside the outer box 1. A rotating drum 4 is rotatably disposed in the water tank 2 in a coaxial state with the water tank 2. The rotating drum 4 has a large number of dewatering holes 4a (only part of which are shown) serving as ventilation holes on the peripheral side wall and the rear wall, and also functions as a washing tub, a dewatering tub, and a drying tub. A plurality of baffles 4 b (only one is shown) are provided on the inner peripheral surface of the rotating drum 4.

  The outer box 1, the water tank 2 and the rotating drum 4 all have openings 5, 6 and 7 for putting in and out the laundry on the front surface (right side in FIG. 1). The part 5 and the opening 6 are connected in a watertight manner by an elastically deformable bellows 8. The opening 5 of the outer box 1 is provided with a door 9 for opening and closing the opening. The rotating drum 4 has a rotating shaft 10 on the back surface, and the rotating shaft 10 is supported by a bearing (not shown) and attached to the outside of the back surface of the water tank 2. And a direct drive motor (hereinafter referred to as a DD motor) 11.

  A casing 13 is supported on the bottom plate 1a of the outer box 1 via a plurality of support members 12, and a discharge port 13a and a suction port 13b are formed at the upper right end portion and the upper left end portion of the casing 13, respectively. ing. Moreover, the compressor 15 of the refrigerating cycle 14 is installed in the bottom plate 1a. Further, in the casing 13, a condenser 16 and a cooler 17 of the refrigeration cycle 14 are installed in order from the right side to the left side, and a blower fan 18 is disposed at the right end portion. A dish-shaped water receiving portion 13 c is formed in a portion of the casing 13 located below the condenser 16.

  In the water tank 2, an intake port 19 is formed in the upper part of the front surface part, and an exhaust port 20 is formed in the lower part of the back surface part. The intake port 19 is connected to the discharge port 13 a of the casing 13 through a linear duct 21 and an extendable connecting duct 22. Further, the exhaust port 20 is connected to the suction port 13 b of the casing 13 via an annular duct 23 and an extendable connecting duct 24. As shown in FIG. 2, the annular duct 23 is attached to the outside of the back surface portion of the water tank 2 and is formed concentrically with the DD motor 11. Therefore, in this embodiment, in the annular duct 23, the inlet side is connected to the exhaust port 20, and the outlet side is connected to the suction port 13 b via the connecting duct 24. The casing 13, the connecting duct 22, the linear duct 21, the intake port 19, the exhaust port 20, the annular duct 23, and the connecting duct 14 constitute an air circulation path 25.

  In the outer box 1, a water supply valve 26 including a three-way valve is disposed at the upper rear portion thereof, and a detergent feeder 27 is disposed at the upper upper portion thereof. The water supply valve 26 has a water inlet connected to a water faucet via a water supply hose, a first water outlet connected to an upper water inlet of the detergent feeder 27 via a washing water hose 28, The water outlet is connected to the lower water inlet of the detergent dispenser 27 via the rinsing water supply hose 29. The water outlet of the detergent dispenser 27 is connected to a water inlet 2 a formed at the upper part of the water tank 2 via a water supply hose 30.

A drain port 2 b is formed at a site behind the bottom of the water tank 2, and the drain port 2 b is connected to a drain hose 32 via a drain valve 31. A part of the drainage hose 32 is telescopic. And the water receiving part 13c of the casing 13 is connected to the middle part of the drainage hose 32 via the drainage hose 33 and the check valve 34.
As shown in FIG. 1, an operation panel unit 35 is provided on the front upper portion of the outer box 1. The operation panel unit 35 is provided with a display and various operation switches (not shown). Yes. A control device 36 as control means is provided on the back surface of the operation panel unit 35. The control device 36 is mainly composed of a microcomputer, and performs various washing operations by controlling the water supply valve 26, the DD motor 11 and the drain valve 31 based on the operation of the operation switch of the operation panel unit 35, and thereafter. The DD motor 11 and the compressor 15 are controlled to perform a drying operation.

Next, the operation of this embodiment will be described.
When the laundry is put into the rotating drum 4 and the operation switch of the operation panel unit 35 is operated to start the operation of the control device 36, the control device 36 executes the washing operation of the selected course. The washing operation is basically performed as follows. First, the water supply valve 26 is operated, and the tap water from the tap is supplied to the upper inlet of the detergent feeder 27 via the first outlet and the washing water hose 28. The water supplied to the detergent feeder 27 is supplied into the aquarium 2 as washing water through the water outlet, the water supply hose 30 and the water inlet 2a while dissolving the detergent previously introduced in the upper stage of the detergent feeder 27. When the washing water is supplied to the set water level in the water tank 2, the operation of the water supply valve 26 is stopped, and the DD motor 11 is driven instead to rotate the rotating drum 4 at a low speed.

  When the rotating drum 4 is rotated, the laundry inside is repeatedly stirred up by the baffle 4b and then dropped onto the washing water, and thus the washing is performed. When such washing is performed for a set time, the operation of the DD motor 11 is stopped. Instead, the drain valve 31 is operated, and the washing water in the water tank 2 is discharged to the outside through the drain valve 31 and the drain hose 32. Draining is performed. When this drainage is performed for a set time, the operation of the drain valve 31 is stopped and the water supply bottle 26 is operated again. The water supply valve 26 supplies the tap water from the water tap to the lower water inlet of the detergent dispenser 27 via the second water outlet and the rinsing water supply hose 29 this time. The water supplied to the detergent feeder 27 is supplied as it is into the water tank 2 as washing water through the water outlet, the water supply hose 30 and the water supply port 2a. When the washing water is supplied to the set water level in the water tank 2, the operation of the water supply valve 26 is stopped, and the DD motor 11 is driven instead to rotate the rotating drum 4 at a low speed.

  When the rotating drum 4 is rotated, the internal laundry is stirred and rinsed in the same manner as in washing. When such rinsing is performed for a set time, the operation of the DD motor 11 is stopped, and instead, the drain valve 31 is operated and drainage is performed. When this drainage is performed for a set time, the DD motor 11 is operated to rotate the rotating drum 4 at a high speed. When the rotating drum 4 is rotated at a high speed, the laundry inside is brought into close contact with the inner peripheral wall of the rotating drum 4 and the washing water impregnated by the rotating centrifugal force is shaken off to perform dehydration. When such dehydration is performed for a set time, the operation of the DD motor 11 is stopped, and then the operation of the drain valve 31 is stopped to complete the dehydration. Then, the washing operation including washing, rinsing and dehydration is completed.

  By the way, at the time of washing and rinsing in the above-described washing operation, the rotating drum 4 is rotated at a low speed, so that the laundry inside is picked up by the baffle 4a and then dropped and knocked on the selected water. The so-called “tapping” is performed. In this case, the washing water supplied into the water tank 2 is set in a plurality of stages according to the amount of the laundry, but as described above, the “tapping” is performed at the time of washing and rinsing (during washing). Even if the highest water level (the highest water level during washing) is set because the “washing” is performed, the highest water level during washing is the center of the rotation shaft 10 that is the rotation center of the rotating drum 4, that is, the rotation center of the DD motor 11. Is set to a lower position. Therefore, the air inlet 19 formed in the upper part of the front part of the aquarium 2 is necessarily provided at a position higher than the highest water level during washing, and the exhaust port 20 formed in the lower part of the back part of the aquarium 2 is Inevitably, it is provided at a position lower than the maximum water level during washing.

  Further, since the annular duct 23 which is a part of the air circulation path 25 on the exhaust port 20 side provided at a position lower than the highest water level during washing is provided concentrically with the DD motor 11, The upper part is necessarily provided at a position higher than the highest water level during washing. As described above, even if the exhaust port 20 of the water tank 2 is provided at a position lower than the highest water level during washing, the washing water in the water tank 2 does not flow into the casing 13 from the drain port 20.

  Now, the drying operation following the washing operation described above is performed by the control device 36 as follows. First, the DD motor 11 is operated to rotate the rotating drum 4 at a low speed. Thereby, the laundry in the rotating drum 4 is agitated in the same manner as in the washing operation. Further, the compressor 15 of the refrigeration cycle 14 is operated. As a result, the gas refrigerant compressed by the compressor 15 is compressed by the condenser 16 to become a liquid refrigerant. At this time, the condenser 16 dissipates heat, and further, the gas refrigerant evaporates by the cooler 17 and becomes a gas. At this time, the cooler 17 absorbs heat, and the gaseous refrigerant is circulated so as to be compressed by the compressor 15 again. Further, the blower fan 18 is operated. Thereby, as indicated by arrows in FIGS. 1 and 2, the air heated by the condenser 16 serving as a heating source passes through the discharge port 13 a of the casing 13, the connecting duct 22, the linear duct 21, and the intake port 19. It is supplied as hot air into the water tank 2.

The warm air supplied from the intake port 19 into the water tank 2 flows diagonally toward the exhaust port 20 of the water tank 2, and during this time, from the dewatering holes 4 a on the peripheral side wall of the rotary drum 4, Water is taken away from the laundry that has flowed into and stirred, and is further discharged from the exhaust port 20 to the outside of the water tank 2 through the dewatering hole 4a on the rear wall.
And by the ventilation effect | action of the ventilation fan 18, the exhaust_gas | exhaustion from the exhaust port 20 distribute | circulates the inside of the annular duct 23 in the clockwise direction of FIG. 2, and is returned in the casing 13 via the connection duct 24 and the suction inlet 13b. The exhaust gas returned into the casing 13 is cooled by a cooler 17 serving as a cooling source and dehumidified, and then circulated so as to be heated again by a condenser 16. The water dehumidified by the cooler 17 is received by the water receiving portion 13 c of the casing 13 and then discharged to the drain hose 32 through the drain hose 33 and the check valve 34. Such a drying operation is performed for a set time, and thus the washing and drying operation ends.

  As described above, according to this embodiment, the air inlet 19 is provided at the upper part of the front surface of the water tank 2 (at a position higher than the highest water level during washing) and exhausted at the lower part of the rear part (at a position lower than the highest water level during washing). Since the opening 20 is provided, during the drying operation, the warm air supplied from the intake port 19 into the water tank 2 flows in a diagonal line toward the exhaust port 20, and thus the conventional warm air is supplied to the water tank. Unlike the case where the inner upper part is circulated linearly, the warm air comes into sufficient contact with the laundry being stirred in the rotary drum 4, and the drying performance can be improved. And since the upper part of the annular duct 23 which is a part of the air circulation path 25 on the exhaust port 20 side is provided at a position higher than the highest water level during washing, the washing water in the water tank 2 is supplied to the refrigeration cycle 14 during washing operation. It does not flow into the casing 13 on the side of the condenser 16 and the cooler 17.

  Further, since the annular duct 23 is provided concentrically with the DD motor 11 attached to the outside of the back surface of the water tank 2, the upper portion of the annular duct 23 is necessarily provided at a position higher than the highest water level during washing. In addition, since the annular duct 23 is disposed in a so-called dead space of the DD motor 11 which is not used at all, it is not necessary to enlarge the outer box 1 in order to provide the annular duct 23.

(Second embodiment)
3 and 4 show a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and different parts will be described below.
In FIG. 3, an intake port 37 is provided in the lower part of the back surface of the water tank 2 instead of the exhaust port 20, and an exhaust port 38 is provided in the upper part of the front surface part of the water tank 2 instead of the intake port 19. And in this 2nd Example, the casing 13 becomes a form arrange | positioned so that right and left may be opposite to a 1st Example. That is, in the casing 13, the discharge port 13 a is located on the rear side in the outer box 1, and the suction port 13 b is located on the front side of the outer box 1. Inside, the blower fan 18, the condenser 16, and the cooler are provided. 17 are arranged in the same order from the left to the right.

  Accordingly, the air inlet 37 at the lower part of the rear surface of the water tank 2 is connected to the discharge port 13a of the casing 13 via the annular duct 23 and the connecting duct 24, and the air outlet 38 at the upper part of the front surface of the water tank 2 is connected to the linear duct 21. And connected to the suction port 13 b of the casing 13 through the connecting duct 22. Thereby, the air inlet 37 at the lower part of the back surface of the aquarium 2 is provided at a position lower than the highest water level during washing, and the air outlet 38 at the upper part of the front part of the water tank 2 is provided at a position higher than the highest water level during washing. Then, the upper part of the annular duct 23 which is a part of the air circulation path 25 on the intake port 37 side provided at a position lower than the highest water level during washing is provided at a position higher than the highest water level during washing. .

  Therefore, the drying operation by the control device 36 is performed as follows. The compressor 15 of the refrigeration cycle 14 is operated and the fan 18 is operated as in the first embodiment. 3 and 4, the air heated by the condenser 16, that is, warm air, is supplied into the water tank 2 from the air inlet 37 of the water tank 2 through the connection duct 24 and the annular duct 23. It flows in the water tank 2 and the rotating drum 4 toward the upper exhaust port 38. The warm air that has taken moisture from the laundry in the rotary drum 4 is discharged from the exhaust port 38 to the outside of the water tub 2 as exhaust gas, and the exhaust gas passes through the linear duct 21 and the connecting duct 22 and is then introduced into the casing 13 from the suction port 13b. After being cooled and dehumidified by the cooler 17, it is circulated so as to be heated again by the condenser 16.

  According to the second embodiment, the flow of warm air in the water tank 2 (rotating drum 4) is directed from the lower side to the upper side as opposed to the first embodiment. The same effect as that of the first embodiment can be obtained.

(Third embodiment)
5 and 6 show a third embodiment of the present invention. The same parts as those in the first embodiment (FIGS. 1 and 2) are denoted by the same reference numerals, and different parts will be described below.

In the third embodiment, as shown in FIG. 5, a drying heater 39 is disposed in a linear duct 21 that is a part of the air circulation path 25 on the intake port 19 side. This drying heater 39 can adjust the maximum temperature of the hot air from 100 ° C. to 120 ° C. by assisting the amount of air heated by the condenser 16 during the drying operation and by controlling the energization amount by the control device 36. is there.
Further, as shown in FIG. 6, an injection nozzle 40 is attached to the peripheral side wall of the annular duct 23 so as to be located at a position slightly shifted counterclockwise (exhaust port 20 direction) from the uppermost portion. The injection hole of the injection nozzle 40 faces the annular duct 23. A water supply valve 41 in place of the water supply valve 26 is a four-way valve, and the first and second water intakes of the upper and lower stages of the detergent charging device 27 are inserted through a water supply hose 28 for washing and a water supply hose 29 for rinsing, respectively. It is connected to the water inlet and performs the same operation as the water supply valve 26. And the 3rd water outlet of this water supply valve 41 is connected to the injection nozzle 40 via the dehumidification water supply hose 42.

  Thus, during the drying operation under the control of the control device 36, the drying heater 39 is also energized to perform a heat generating operation, and the water supply valve 41 is operated to supply tap water to the third outlet and the dehumidifying water supply hose 42. After that, it is supplied to the injection nozzle 40. Thereby, the injection nozzle 40 injects the cooling water which is tap water in the annular duct 23 in the shape of a shower. Therefore, the exhaust gas flowing as shown by the arrows in FIG. 6 is cooled by contact with shower-like dehumidifying water and dehumidified. That is, the spray nozzle 40 constitutes a dehumidifying heat exchanger together with cooling water sprayed in a shower shape, and supplements the dehumidifying ability of the cooler 17.

  The water dehumidified from the exhaust flows into the water tank 2 from the exhaust port 20 together with the cooling water, and is discharged to the outside through the drain valve 31 and the drain hose 32. Therefore, in the third embodiment, the drain valve 31 is also operated during the drying operation. Here, the amount of cooling water supplied from the injection nozzle 40 into the annular duct 23 is set to 0.5 liters per minute, for example.

According to the third embodiment as described above, in addition to the same effects as those of the first embodiment, the following effects are also achieved.
Since the drying heater 39 is disposed in the linear duct 21 of the air circulation path 25, the temperature of the hot air supplied into the water tank 2 can be made higher than that in the first embodiment, and the drying operation can be performed. Time can be shortened.

  An injection nozzle 40 is disposed in an annular duct 23 that forms a part of the air circulation path 25, and cooling water is sprayed into the annular duct 23 from the injection nozzle 40 in a shower-like manner, thereby cooling and dehumidifying the exhaust gas. As a result, the increase in the heating amount due to the provision of the drying heater 39 can be cooled by the dehumidifying heat exchanger composed of the spray nozzle 40 and the shower-like cooling water. The lack of dehumidification due to the provision can be compensated.

(Fourth embodiment)
7 and 8 show a fourth embodiment of the present invention. The same reference numerals are used for the same parts as those of the second embodiment (vinegar 3, FIG. 4) and the third embodiment (FIGS. 5 and 6). The different parts will be described below.
In the fourth embodiment, the drying heater 39 is disposed in the annular duct 23 that is a part of the air circulation path 25, and the spray nozzle 40 is linear so that the spray hole faces the straight duct 21. It is attached to the side wall of the duct 21. Furthermore, the water receiving part 13c of the casing 13 is formed so as to extend to a lower part of the suction port 13b.

  Thus, during the drying operation, the air (hot air) heated by the condenser 16 is further heated by the drying heater 39 in the annular duct 23, and the exhaust from the exhaust port 38 is injected in the linear duct 21. It cools and dehumidifies by the heat exchanger for dehumidification which consists of the nozzle 40 and the shower-like cooling water from now on. In addition, the water dehumidified in the linear duct 21 is received by the water receiving portion 13c together with the cooling water, and then the water dehumidified by the cooler 17 is passed through the drain hose 33 and the check valve 34 to the drain hose 32. Discharged.

Therefore, the same effect as that of the third embodiment can be obtained also by the fourth embodiment.
In the third and fourth embodiments, the entire period from the start to the end of the drying operation is subjected to dehumidification from the exhaust by the spray nozzle 40 and a dehumidifying heat exchanger composed of shower-like cooling water. However, the following may be used instead. That is, the drying operation has a heating period in which the temperature in the water tank 2 (the rotating drum 4) is sequentially increased from the beginning, and a constant rate period in which moisture is actively evaporated from the laundry and the temperature becomes substantially constant. However, the dehumidification heat exchanger may be used to perform dehumidification from the exhaust during the period from the start of this constant rate period to the end of drying.

  In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and it is needless to say that the present invention can be appropriately modified without departing from the spirit of the invention.

1 is a longitudinal side view showing a first embodiment of the present invention. Rear view with the back plate of the outer box removed Vertical side view showing a second embodiment of the present invention Rear view with the back plate of the outer box removed FIG. 1 equivalent view showing a third embodiment of the present invention. 2 equivalent diagram FIG. 3 equivalent view showing a fourth embodiment of the present invention. 4 equivalent diagram

Explanation of symbols

In the drawings, 1 is an outer box, 2 is a water tank, 4 is a rotating drum, 11 is a direct drive motor (drive motor), 13 is a casing, 14 is a refrigeration cycle, 15 is a compressor, 16 is a condenser, and 17 is a cooler. , 18 is a blower fan, 19 is an intake port, 20 is an exhaust port, 21 is a linear duct, 23 is an annular duct (a part of the air circulation path), 25 is an air circulation path, 26 is a water supply valve, and 27 is a detergent supply. , 31 is a drain valve, 36 is a control device, 37 is an intake port, 38 is an exhaust port, 39 is a heater for drying, 40 is an injection nozzle (heat exchanger for dehumidification), and 41 is a water supply valve.

Claims (4)

A water tank disposed in the outer box and having an intake port and an exhaust port;
A rotating drum that is rotatably disposed in the aquarium and accommodates laundry;
A refrigeration cycle having a compressor installed on the bottom plate of the outer box, a condenser as a heating source and a cooler as a cooling source;
An air circulation path for supplying air heated by the condenser into the water tank from the intake port, and circulating the air discharged from the exhaust port so as to be heated again by the condenser after being cooled and dehumidified by the cooler; Comprising
The intake or exhaust port is provided at a position lower than the highest water level during washing of the water tank,
A drum type washing and drying machine, wherein a part of the air circulation path on the intake port or exhaust port side provided at the lower position is provided at a position higher than the highest water level during washing. A drive motor for driving the rotating drum is provided in the water tank,
2. A part of an air circulation path on an intake port or exhaust port side provided at a position lower than a maximum water level at the time of washing is formed in an annular duct concentric with the drive motor. Drum-type washer-dryer. An exhaust port is provided at a position lower than the maximum water level during washing,
An annular duct is provided with a heat exchanger for dehumidification,
3. A drum type washing and drying machine according to claim 2, wherein a drying heater is disposed in the air circulation path on the inlet side. An intake port is provided at a position lower than the maximum water level when washing,
An annular duct is provided with a drying heater,
The drum type washing and drying machine according to claim 2, wherein a heat exchanger for dehumidification is disposed in the air circulation path on the exhaust port side.

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