JP2020010959A - Clothes dryer - Google Patents

Abstract

To provide a clothes dryer capable of suppressing a compressor becoming excessively high in temperature, and capable of improving drying efficiency.SOLUTION: In a clothes dryer, an evaporator is stored and arranged on the upstream side and a condenser is stored and arranged on the downstream side of circulating air respectively in a circulation air passage, and a compressor is arranged outside of the circulation air passage. Outside of the circulation air passage, an enclosure part for surrounding around the compressor is provided so as to communicate in a position between the evaporator and the condenser with respect to the circulation air passage. The enclosure part has a first opening for taking in the outside air, and is constituted as a suction part for sucking the outside air taken in from the first opening into the circulation air passage from the position communicating through the enclosure part.SELECTED DRAWING: Figure 5

Description

  Embodiments of the present invention relate to a clothes dryer.

  2. Description of the Related Art Conventionally, as a clothes dryer, for example, a washing dryer having a clothes washing function and a drying function has been known. In the washer / dryer, a circulation air path is provided outside a water tank functioning as a drying room, and air in the water tank is circulated through the circulation air path by a blowing action of a blowing device, and dehumidification and heating of the circulation air are performed. , And a heat pump using an evaporator and a condenser.

  In this type, an evaporator is arranged on the upstream side of the circulating air inside the circulating air passage, and the compressor and the condenser are arranged separately in two paths branched on the downstream side. Have been. According to this configuration, in one of the circulating air passages, the heat generating action of the compressor, which is relatively hot, can be used for heating the circulating air.

JP 2008-80023 A

However, the circulating air in the above-described one path is not heated by the condenser, and a pressure loss is inevitably generated in the compressor.
Further, even if the compressor is arranged outside the circulation air passage, the operating frequency of the compressor may be reduced in order to suppress a rise in the temperature of the compressor (particularly, the temperature of the winding of the compressor motor). The degree of opening of the decompression device must be increased, and the efficiency of the refrigeration cycle and thus the drying efficiency may be reduced.

  Therefore, a clothes dryer capable of suppressing the compressor from being excessively high in temperature and improving the drying efficiency is provided.

  The clothes dryer of the embodiment includes a drying chamber in which clothes are stored, a circulation air path provided at both ends outside the drying chamber so as to communicate with the drying chamber, and the air in the drying chamber through the circulation air. A blower that circulates through the passage, a heat pump that has a refrigeration cycle that circulates the refrigerant through a compressor, a condenser, a decompression device, and an evaporator, and that dehumidifies and heats the air in the circulating passage. In the circulation wind path, the evaporator is accommodated and arranged on the downstream side of the evaporator on the upstream side of the circulating air, and the compressor is arranged outside the circulation air path, Outside the circulating air passage, an enclosure surrounding the compressor is provided so as to communicate with the circulation air passage at a position between the evaporator and the condenser. Has first opening for taking in The outside air taken in from the first opening, is constructed as a suction unit for sucking from the position the communication through the enclosure portion to the air circulation path.

Longitudinal side view schematically showing the inside of the washer / dryer Rear view schematically showing the configuration of the washer / dryer together with a heat pump Perspective view of the vicinity of the exhaust part in a state where a part of the top plate part is broken. Longitudinal side view showing part of the duct in the circulating air path together with the exhaust damper A cross-sectional plan view schematically showing a duct for a heat exchanger in a circulation air passage together with an enclosure of a compressor.

  Hereinafter, the present embodiment will be described with reference to the drawings. The washing / drying machine 1 shown in FIG. 1 has a function as a washing machine for washing clothes in the rotating tub 10 and a function as a clothes drying machine for drying clothes in the rotating tub 10, that is, a so-called horizontal axis type. It is a drum type washing machine.

  The outer box 2 forming the outer shell in the washing and drying machine 1 has a rectangular box shape. The front part 2a of the outer box 2 is formed in a slightly downwardly inclined shape. The front part 2a is provided with a door 3 for opening and closing a laundry entrance (not shown). Although not shown in detail, an operation panel 4 (see FIG. 1) provided with a power on / off key and a display unit is provided at a front portion of the top plate 2b in the outer box 2. The display unit has a touch panel that receives a user's touch operation, and can perform various displays for the user and settings such as a driving course.

  As shown in FIGS. 1 and 2, a rotary tank 10 and a water tank 7 that accommodates the rotary tank 10 are provided inside the outer box 2. The rotating tub 10 is a bottomed cylindrical drum capable of storing clothes therein, and the water tub 7 is a bottomed cylindrical tub capable of storing water. Is equivalent to

  The water tank 7 is elastically supported by a suspension (not shown) in a state in which its axis is oriented in the lateral direction with the front-rear direction and slightly inclined forward. The front opening of the water tub 7 is connected to the laundry entrance through a bellows 7a. Although not shown, a water supply mechanism for supplying water into the water tank 7 is provided at an upper portion in the outer box 2, and the water supply mechanism is connected to a tap of a water supply through a water supply hose.

  A drain port 7b is provided at the rear bottom of the water tank 7. A drain pipe 9 is connected to the drain port 7b via a drain valve 8. When water is supplied from the water supply mechanism into the water tank 7 with the drain valve 8 closed, the water is stored in the water tank 7. With the opening of the drain valve 8, the water stored in the water tank 7 is discharged out of the machine through the drain pipe 9.

  Similar to the water tank 7, the rotary tank 10 is disposed in a horizontal direction with the axis line in the front-rear direction, and in a slightly upwardly inclined state. The front opening of the rotating tub 10 communicates with the front opening of the water tub 7 and the laundry doorway. By opening the door 3, the laundry doorway passes through the front opening of the water tub 7 and the rotating tub 10 from the laundry doorway. Clothing can be taken in and out of the rotating tub 10. The rotary tank 10 is provided with a large number of holes 10b as shown in FIG. The hole portion 10b functions as a water passage hole during the washing operation, functions as a dewatering hole during the dehydration operation, and functions as a ventilation hole during the drying operation.

  On the back side of the water tank 7, a drum motor 11 composed of, for example, a DC brushless motor is provided. The rotating shaft of the drum motor 11 penetrates the back of the water tank 7 and is connected to the back of the rotating tank 10, and the rotating tank 10 is directly driven to rotate by the drum motor 11.

  Inside the outer box 2, there is provided a circulation air passage 12 which is located outside the water tank 7 and has an exhaust duct 13 and an air supply duct 17 which constitute both ends thereof and communicate with the water tank 7. The water tank 7 is provided with an outlet 7c connected to an exhaust duct 13 serving as one end of the circulation air passage 12 and an inlet 7d connected to an air supply duct 17 serving as the other end of the circulation air passage 12. ing. As shown in FIG. 2, the inlet 7d is provided at a position above the drum motor 11 in the aquarium end plate, which is the back surface of the aquarium 7, and the outlet 7c is, as shown in FIG. It is provided in the upper part.

  The circulation air passage 12 includes a filter duct 14, an intermediate duct 15, and a heat exchanger duct 16 in this order between an exhaust duct 13 forming one end thereof and an air supply duct 17 forming the other end thereof. It is formed by duct members 13 to 17 that are connected to each other. Specifically, as shown in FIG. 1, the exhaust duct 13 at one end of the circulation air passage 12 is connected to the outlet 7c of the water tank 7 at its front end. The rear end of the exhaust duct 13 is connected to the filter duct 14 from the front. At the front of the filter duct 14, a filter device 20, which will be described later, is provided. As shown in FIG. 4, the filter duct 14 is inclined downward toward the rear, and the rear lower end is connected to the upper end of the intermediate duct 15.

  The intermediate duct 15 extends downward as shown in FIG. 2, and has a lower end connected to one end of the heat exchanger duct 16. The heat exchanger duct 16 extends in the left-right direction at the lower part of the outer box 2, and the other end is connected to an air inlet 22 a in a fan casing 22 of the blower 21. The blower 21 includes a fan casing 22, a fan 21a arranged in the fan casing 22, and a fan motor 21b for rotating the fan 21a. The outlet 22 b of the fan casing 22 faces upward and is connected to the lower end of the air supply duct 17. The air supply duct 17 extends in the up-down direction, and its upper end is connected to the inlet 7 d on the back of the water tank 7.

  Thus, when the fan motor 21b is driven, the air discharged from the discharge port 22b of the fan casing 22 passes through the air supply duct 17 as shown by the arrows in FIGS. The water is supplied from the inlet 7d into the water tank 7, and eventually into the rotary tank 10. In addition, the air in the rotary tank 10 or the water tank 7 passes through the exhaust duct 13, the filter duct 14, the intermediate duct 15, and the heat exchanger duct 16 in this order from the outlet 7c, and from the intake port 22a of the fan casing 22 to the fan casing 22. It is sucked in. In this way, the air in the water tank 7 can be circulated through the circulation air passage 12.

  As shown in FIG. 4, the filter device 20 has a double structure including a first filter member 25a and a second filter member 25b, and captures lint such as lint from clothes during a drying operation. The mesh of the second filter member 25b is finer than the mesh of the first filter member 25a, and lint that has passed through the first filter member 25a can be captured by the second filter member 25b. Each of the filter members 25a and 25b is detachably attached to the filter accommodating portion 14a of the filter duct 14.

  As shown in FIGS. 3 and 4, a filter cover 26 having a hand opening 26 a is provided in a portion of the top plate 2 b of the outer box 2 corresponding to the filter device 20. The filter cover 26 can be opened by pushing down the lid portion 27 covering the opening 26a with the shaft portion 27a at the rear end as a fulcrum, and lifting the filter cover 26 with fingers on the edge of the opening 26a. With the filter cover 26 opened, the filter members 25a and 25b can be removed from the filter accommodating portion 14a for cleaning.

  As shown in FIG. 4, in the filter duct 14, the rear side of the filter accommodating portion 14a is gently inclined downward toward the rear, and a horizontal portion 14b which is substantially horizontal is provided in the upper part of the middle. ing. The horizontal portion 14b of the duct 14 is provided with an exhaust port 28a. As shown in FIG. 3, the exhaust port 28a is formed by a plurality of slits extending in the front-rear direction and arranged in the left-right direction. The exhaust port 28a is an exhaust portion (second opening) that connects the inside of the filter duct 14 and thus the inside of the circulation air passage 12 with the outside of the circulation air passage 12, and discharges air circulating in the air passage 12 to the outside. ing. An exhaust damper 29 for opening and closing the exhaust port 28a is provided on the upper surface side of the horizontal portion 14b. The exhaust damper 29 is rotatable about a shaft 29a (see FIG. 4) at one end, and is driven to rotate by a damper motor (not shown).

  As shown in FIGS. 3 and 4, the top plate 2 b of the outer box 2 is provided with an inclined surface 2 c that is located near the upper part of the horizontal portion 14 b and that is inclined downward toward the rear. An outer exhaust port 28b (shown only in FIG. 4) is provided on the inclined surface 2c of the top plate 2b. Like the exhaust port 28a, the outer exhaust port 28b is formed by a plurality of slits arranged in the left-right direction, and communicates the inside of the outer box 2 with the outside of the outer box 2. The outer exhaust port 28b has a longer slit length than the exhaust port 28a and has a larger opening area than the exhaust port 28a. Thereby, when the exhaust damper 29 is opened and the exhaust port 28a is opened during the operation of the fan motor 21b, a part of the air flowing in the circulation air passage 12 is changed as shown by an arrow D1 in FIG. The air is discharged from the outer casing 2 through the exhaust port 28a through the outer exhaust port 28b.

  As shown in FIG. 2, a condenser 31 and an evaporator 32 of a heat pump 30 are disposed in the heat exchanger duct 16. As is well known, the heat pump 30 includes a compressor 33 that compresses and discharges the refrigerant, a condenser 31 that radiates, condenses, and liquefies the high-temperature and high-pressure refrigerant discharged from the compressor 33, and a condenser 31. A throttle device 34 for reducing the pressure of the refrigerant liquefied in step 3, an evaporator 32 for evaporating the refrigerant passing through the throttle device 34, and an accumulator 35 for stably flowing the refrigerant into the compressor 33 are cycled through a refrigerant channel 30a. It is configured as a connected refrigeration cycle.

  Among them, the condenser 31 is a means for heating the air flowing in the heat exchanger duct 16, the evaporator 32 is a means for cooling and dehumidifying the air flowing in the heat exchanger duct 16, and the expansion device 34 is, for example, This is means for reducing the pressure of the refrigerant by a pressure reducing device including a throttle valve. The compressor 33 has a suction port 33b and a discharge port 33a, and has a compressor motor 33c driven by an inverter power supply 50a (a control device 50 described later) shown in FIG. It is a variable type. The accumulator 35 separates the refrigerant into gas and liquid, and returns the gas refrigerant to the suction port 33 b of the compressor 33.

  The circulating air passage 12 of the present embodiment uses the above-described heat exchanger duct 16 as a main duct, and accommodates and arranges an evaporator 32 on the upstream side and a condenser 31 on the downstream side, respectively. An enclosure 37 for the compressor 33 is provided continuously outside the compressor 12. The configuration of the heat exchanger duct 16 and the enclosure 37 in the circulation air passage 12 will be described in detail with reference to FIG. Here, FIG. 5 is a plan view schematically showing the heat exchanger duct 16 and the enclosing portion 37. For convenience of explanation, the evaporator 32, the condenser 31, and the compressor 33 arranged inside the solid line are indicated by solid lines. Is a cross-sectional plan view.

  As shown in FIGS. 1, 2, and 5, the heat exchanger duct 16 extends in the left-right direction at a lower portion in the outer box 2 and has a horizontally long case shape as a whole. In the heat exchanger duct 16, the evaporator 32 is arranged near the intermediate duct 15, and the condenser 31 is arranged near the fan casing 22. Thus, the heat exchanger duct 16 houses, as one case body, the evaporator 32 and the condenser 31 in order from the upstream side of the circulating air with a predetermined interval therebetween. As shown in FIGS. 1 and 2, a drain tank 38 for storing dehumidified water dehumidified by the evaporator 32 is provided at the bottom of the heat exchanger duct 16 (hereinafter, abbreviated as “duct” 16 as appropriate). ing.

  As shown in FIG. 5, an enclosure 37 for the compressor 33 is provided on the front side wall as the outer wall 16 a of the duct 16 so as to project forward. The enclosing portion 37 is located at a position separating the right-side evaporator 32 and the outer wall 16 a in the duct 16, that is, at a position outside the duct 16.

  The surrounding portion 37 surrounds the compressor 33 with side walls 37a, 37b, 37c serving as peripheral walls thereof, an outer wall 16a of the duct 16, and a bottom wall 37d and an upper wall 37e (see FIG. 1). As described above, the enclosure 37 has a box shape that houses the compressor 33 by the walls 37 a to 37 e provided integrally with the outer wall 16 a of the duct 16. Although not shown in FIGS. 1 and 5, the accumulator 35 attached to the compressor 33 is not accommodated in the enclosure 37 and is disposed immediately outside the enclosure 37.

  As shown in FIG. 5, the surrounding portion 37 has a left wall 37 c connected to the upstream end of the condenser 31, and a position of a left corner thereof, that is, a position between the upstream end of the condenser 31 and the downstream end of the evaporator 32. Has a communication hole 39b. As shown in FIG. 2, the communication hole 39 b is an opening formed so that the outer wall 16 a is cut out in a strip shape over the bottom wall and the upper wall of the duct 16, and the inside of the enclosure 37 and the inside of the duct 16 are formed. And communicate.

  On the other hand, in the surrounding portion 37, an intake port 39a is provided at a diagonal corner on the right wall 37a side. The intake port 39a is formed so as to be cut out across the bottom wall 37d and the upper wall 37e, and corresponds to a first opening that takes in air outside the enclosure 37 (in the outer box 2), that is, outside air. In the enclosure 37, the air inlet 39a and the communication hole 39b are always open. Thus, when the fan motor 21b is operated, the exhaust damper 29 opens the exhaust port 28a and a part of the circulating wind is exhausted, so that outside air is taken in from the intake port 39a of the enclosure 37 (see FIG. 5). Through the periphery of the compressor 33, the air is sucked into the duct 16 of the circulation air passage 12 from the communication hole 39b.

  As shown in FIG. 2, the air supply duct 17 of the circulation air passage 12 is located near the inlet 7 d shown in FIG. 2 and is supplied into the water tank 7 of the circulation air flowing through the circulation air passage 12. An air supply temperature sensor 41 for detecting the temperature of the wind is provided. On the other hand, in the duct 14 on the outlet 7c side in the circulation air passage 12 shown in FIG. 1, an exhaust temperature sensor 42 (see FIG. 1) which is located downstream of the exhaust port 28a and detects the temperature of the circulation air on the outlet 7c side. 1 and FIG. 4).

  The heat pump 30 shown in FIG. 2 includes a discharge port temperature sensor 43 that detects a temperature near the discharge port 33a of the compressor 33 as a refrigerant temperature sensor that detects the temperature of the refrigerant flowing through the refrigerant flow path 30a. Condenser temperature sensor 44 for detecting the temperature of the compressor 31, evaporator temperature sensor 45 for detecting the temperature on the inlet side of the evaporator 32, and suction port temperature sensor 46 for detecting the temperature near the suction port 33 b of the compressor 33. Are provided.

  Further, as shown in FIG. 1, a control device 50 as a control means is provided at a lower front portion in the outer box 2. The control device 50 mainly includes a microcomputer, and receives input signals from the power on / off key on the operation panel 4, the touch panel, various sensors including the temperature sensors 41 to 46, and the like. The control device 50 controls the display unit of the operation panel 4, the water supply mechanism, the drain valve 8, the drum motor 11, the fan motor 21 b, the exhaust damper 29, the heat pump 30 based on these various input signals and a control program stored in advance. Of the compressor motor 33c is controlled.

Next, the operation of the above configuration will be described focusing on the operation in the drying operation.
When starting the drying operation, the control device 50 appropriately rotates the rotary tub 10 by the drum motor 11 and drives the compressor motor 33c and the fan motor 21b, respectively. In this case, the clothes in the rotating tank 10 are stirred by the rotation of the rotating tank 10. In addition, as the refrigerant circulates through the refrigerant flow path 30a by driving the compressor motor 33c, the air around the condenser 31 is heated by the heat radiation in the condenser 31 and the heat absorption in the evaporator 32 is performed. Thereby, the air around the evaporator 32 is cooled and dehumidified.

  Then, with the driving of the fan motor 21 b, the warm air heated by the condenser 31 passes through the air supply duct 17 and is supplied from the inlet 7 d into the water tank 7, that is, into the drying chamber, and finally into the rotary tank 10. The clothing in the rotating tub 10 is heated by the warm air to remove moisture. The moisture-deprived air is discharged from the outlet 7c to the exhaust duct 13 side. The air discharged to the exhaust duct 13 side passes through the filter duct 14 and the intermediate duct 15 and enters the heat exchanger duct 16. The air containing moisture that has entered the duct 16 is cooled and dehumidified while passing through the evaporator 32. The dehumidified air is heated again in the process of passing through the condenser 31 to be heated and heated, and the warm air passes through the air supply duct 17 and is supplied into the water tank 7 from the inlet 7d. By repeating this flow, the clothes are gradually dried.

  During such a drying operation, lint such as lint from clothes also flows together with air discharged from the outlet 7c to the exhaust duct 13 side, and when passing through the first filter member 25a and the second filter member 25b. Captured.

During the drying operation, the control device 50 controls the opening and closing of the exhaust damper 29 based on the temperature detected by the discharge port temperature sensor 43.
Specifically, for example, at the start of the drying operation, the exhaust damper 29 is closed (see a two-dot chain line in FIG. 4). In the initial stage of drying, the control device 50 sets and maintains the operating frequency of the compressor motor 33c at the highest value, and gradually increases the temperature detected by the supply air temperature sensor 41 and the exhaust temperature sensor 42. To raise. In this case, since the exhaust damper 29 is closed, the circulating air flowing in the water tank 7 and the circulating air passage 12 is not exhausted from the exhaust port 28a, and is not sucked in from the intake port 39a of the enclosure 37.

  Then, during the drying operation, the amount of moisture taken from the clothes increases, and in the middle stage of drying in which heat exchange between the air containing the moisture and the evaporator 32 is actively performed, the temperature of the evaporator 32 is likely to rise, The temperature of the entire refrigeration cycle including the condenser 31 and the compressor 33 (particularly, the temperature of the winding of the compressor motor 33c) increases. In this case, when the control device 50 determines that the temperature detected by the discharge port temperature sensor 43 is equal to or higher than the first set temperature set in advance, the control device 50 opens the exhaust damper 29 (see the solid line in FIG. 4), 28a is opened. Thereby, a part of the circulating air flowing through the circulating air passage 12 is exhausted from the exhaust port 28a to the outside of the outer box 2 outside the machine through the outer exhaust port 28b as shown by an arrow D1 in FIG. . The exhaust gas discharged from the exhaust port 28a to the outside includes moisture taken from clothing. Further, with the exhaust to the outside, air outside the circulation air passage 12 is drawn into the circulation air passage 12 from the intake port 39a of the enclosure 37 through the communication hole 39b (see the arrow D2 in FIG. 5). ).

  At this time, the intake port 39 a is located at a position diagonal to the communication hole 39 b in the enclosure 37, and takes in outside air into the enclosure 37 so as to blow air to the compressor 33. Further, when the taken-in air hits the compressor 33 and passes therearound, heat exchange is performed, and the compressor 33 is cooled and the air is heated. As a result, the heated air passes through the communication hole 39b and joins with the circulating air in the circulating air passage 12 on the downstream side of the evaporator 32 and on the upstream side of the condenser 31. Therefore, even in consideration of heat transfer and heat radiation with the air in the compressor 33 in the enclosure 37, the higher-temperature circulating wind is supplied to the condenser 31 without trapping heat in the enclosure 37. It can be supplied from the upstream side, and the load on the condenser 31 and the load on the evaporator 32 can be reduced.

  Thereafter, the drying operation proceeds, and the amount of moisture taken from the clothes decreases, and the difference between the temperature detected by the supply air temperature sensor 41 and the temperature detected by the exhaust gas temperature sensor 42 (hereinafter referred to as “temperature difference ΔT”) ) Gradually decreases in the later stage of drying, the control device 50 lowers the operating frequency of the compressor motor 33c, and the temperature of the compressor 33 also decreases. Here, when the control device 50 determines that the temperature detected by the discharge port temperature sensor 43 is lower than the second set temperature set in advance, the control device 50 performs the closing operation of the exhaust damper 29 and closes the exhaust port 28a. This stops the exhaust from the exhaust port 28a to the outside of the machine, and also stops the intake from the intake port 39a of the enclosure 37 into the circulation air passage 12 through the communication hole 39b.

  Thereafter, the drying operation further proceeds. For example, when the temperature difference ΔT becomes equal to or less than the set value, the control device 50 determines that the drying is completed, stops the operation of the compressor motor 33c, and continues the driving of the fan motor 21b. After performing the cooling operation, the fan motor 21b is also stopped, and the drying operation is terminated.

  Among the above-described temperature sensors 41 to 46, the temperature detected by the discharge port temperature sensor 43 indicates a correlation with which the temperature of the winding part of the compressor motor 33c can be estimated. Therefore, by controlling the opening and closing of the exhaust damper 29 based on the temperature detected by the discharge port temperature sensor 43 as described above, the operation of the compressor motor 33c is controlled within a range where the winding part does not become excessively hot. The frequency can be maintained as high as possible, and the heating ability and the dehumidifying ability can be maximized.

  On the other hand, the “temperature difference ΔT” detected by the supply air temperature sensor 41 and the exhaust air temperature sensor 42 indicates a correlation that increases with the “drying rate” until the maximum temperature difference is reached as the clothes dry. Therefore, when the operating frequency of the compressor motor 33c is varied according to the temperature difference ΔT or the drying rate by the control device 50, the temperature of the winding portion is indirectly associated with the detected temperatures of the sensors 41 and 42. You can figure out. Therefore, the control device 50 may control the opening and closing of the exhaust damper 29 based on the temperatures detected by the supply air temperature sensor 41 and the exhaust temperature sensor 42.

  In the washing and drying machine 1 of the present embodiment described above, the surrounding portion 37 surrounding the compressor 33 is positioned outside the circulation air passage 12 with respect to the circulation air passage 12 between the evaporator 32 and the condenser 31. The enclosure 37 has an intake port 39a for taking in outside air, and the outside air taken in from the intake port 39a is passed through the enclosure 37 from the position (communication hole 39b) where the outside air communicates. It is configured as an intake unit that sucks into the circulation air passage 12.

  According to this, the outside air taken into the enclosure 37, that is, the air around the compressor 33, can be supplied from the upstream side of the condenser 31 after heat exchange with the compressor 33. For this reason, it is possible to suppress the compressor 33 from being excessively high in temperature, and it is possible to supply higher-temperature circulating air to the condenser 31. This also reduces the load on the condenser 31 and improves the drying efficiency.

  The control device 50 controls the opening and closing of the exhaust damper 29 based on the temperature detected by the discharge port temperature sensor 43, which is correlated with the temperature of the winding of the compressor motor 33c. According to this, it is possible to control the exhaust timing and the exhaust amount from the exhaust port 28a in the circulation air passage 12, and the intake timing and the intake amount from the intake port 39a of the enclosure 37. Further, since the detection temperature of the discharge port temperature sensor 43 is information indicating a correlation with the temperature of the winding part as described above, it is possible to eliminate the possibility of insulation breakdown or the like due to an excessively high temperature of the winding part. Can be.

  The sensor that indicates the correlation with the temperature of the winding part is not limited to the discharge port temperature sensor 43, and may be another sensor that detects the temperature of the winding part more directly or indirectly. Further, as described above, the control of opening and closing of the exhaust damper 29 may be performed based on at least one of the detected temperatures of the supply air temperature sensor 41 and the exhaust temperature sensor 42, or the refrigerant temperature sensor 43. 46 may be performed based on at least one of the detected temperatures. In any case, the control device 50 determines that the circulating wind is appropriately warmed based on the temperature detected by the sensor, and then discharges part of the circulating wind to the outside and exchanges heat with the compressor 33. By controlling the opening of the exhaust damper 29 so that the outside air is sucked in, it becomes possible to partially discharge the moisture contained in the circulating wind and heat the sucked outside air. Thereby, dehumidification and heating by the heat pump 30 can be promoted, and the drying time can be shortened.

  The present invention is not limited only to the above embodiments, and the washing and drying machine may be a so-called vertical type in which the axes of the water tub and the rotating tub are oriented in the vertical direction, or as a clothes dryer. May have no washing function as long as it has a drying function.

  Further, the enclosure 37 may be any one that communicates with the circulation air passage 12 at a position between the evaporator 32 and the condenser 31, and the size of the communication hole 39 b and the size of the opening of the intake port 39 a are determined. It may be changed as appropriate. Further, the enclosing part 37 may be formed in a shape and a shape surrounding the compressor 33, and is not limited to the form illustrated in FIG. 5 and the like, and may be appropriately changed according to the size and shape of the compressor 33.

  Although several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

  In the drawing, 1 is a washing / drying machine (clothing dryer), 7 is a water tank (drying room), 12 is a circulating air path, 21 is a blower, 28a is an exhaust port (second opening, exhaust section), and 29 is an exhaust damper. , 30 is a heat pump, 31 is a condenser, 32 is an evaporator, 33 is a compressor, 34 is a throttle device (decompression device), 37 is an enclosure (intake unit), 39a is an intake port (first opening), and 39b is The communication hole, 43 indicates a discharge port temperature sensor (sensor), and 50 indicates a control device.

Claims (2)

A drying room where clothes are stored,
Circulating air passages provided so that both ends communicate with the drying chamber outside the drying chamber,
An air blower that circulates the air in the drying chamber through the circulation air passage,
A compressor, a condenser, a decompression device, and a refrigeration cycle to circulate through the evaporator, comprising a heat pump for dehumidifying and heating the air in the circulation air passage,
In the circulating air passage, the evaporator is accommodated and arranged on the downstream side of the evaporator on the upstream side of the circulating air, and the compressor is arranged outside the circulating air passage,
Outside the circulation air passage, an enclosure surrounding the compressor is provided so as to communicate with the circulation air passage at a position between the evaporator and the condenser.
The enclosure has a first opening for taking in outside air, and is configured as an air intake unit that sucks the outside air taken in from the first opening from the communicating position through the enclosure into the circulation wind path. Clothes dryer. A second opening as an exhaust unit for discharging air circulating in the circulation air passage to the outside of the circulation air passage;
An exhaust damper for opening and closing the second opening;
A sensor that outputs information indicating the correlation between the temperature of the winding part in the compressor,
A control device that controls the blower, the heat pump, and the exhaust damper to perform a drying operation,
2. The clothes dryer according to claim 1, wherein the control device controls opening and closing of the exhaust damper based on information from the sensor indicating a correlation with the temperature of the winding unit. 3.

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