JP2011024659A - Clothes dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the clothes drying time by raising the temperature of an evaporator when drying clothes under low ambient temperatures thereby preventing clogging caused by the frost formation or the like on the evaporator. <P>SOLUTION: The clothes dryer suppresses a reduction in the temperature of the evaporator 14 by operating the switching damper 27 of a circulating air path circulating drying air and shortening the circulation air path for the fixed time (the time of ▵T1) when a temperature sensor 23 attached to the evaporator 14 detects a temperature equal to or below a setting value, and suppresses the frost formation to the evaporator 14 by suppressing the reduction in the temperature of the evaporator 14 when returning to a normal circulation air path after the lapse of the fixed time (the time of ▵T1). Thus, the clogging of the evaporator 14 at the low ambient temperatures is suppressed and the drying time of clothes 4 or the like is shortened. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a drying apparatus for drying clothes, bedding, etc. in a non-dry state after washing.

  A drying apparatus having a heat pump device as a drying means is conventionally known (see, for example, Patent Document 1).

  The configuration and operation of the conventional drying apparatus will be described with reference to FIG.

  FIG. 11 shows a drum-type clothes dryer, and a rotating drum 53 that rotates about a horizontal axis 52 as a central axis is arranged in a casing 51. A clothing insertion port 54 formed on the front surface of the rotating drum 53 opens to the front surface of the housing 51 and is opened and closed by a door 55.

  An air circulation path 57 including a drying chamber 56 set inside the rotary drum 53 is configured in the casing 51, and the air circulation path 57 includes a drying chamber 56, a blower chamber 58, a heat exchange chamber 59, and the like on the way. The air in the drying chamber 56 flows from the rotary drum side exhaust port 60 on the back wall to the blower chamber 58, and then passes through the heat exchange chamber 59 and again from the air supply port 61 provided in front of the drying chamber 56. It circulates in this drying chamber 56.

  The motor 62 drives the rotating drum 53 and the fan 65, and the rotation is transmitted to the rotating drum 53 and the fan 65 via belts 63 and 64.

  A fan 65 is disposed in the blower chamber 58, an evaporator 66 is disposed on the upstream side, and a condenser 67 is disposed on the downstream side inside the heat exchange chamber 59.

  The evaporator 66 and the condenser 67 constitute a heat pump together with an expansion mechanism 69 such as a compressor 68 and a capillary tube.

  About the drying apparatus comprised as mentioned above, the operation | movement is demonstrated below.

  First, the high-humidity air from the drying chamber 56 is cooled by the evaporator 66 and dehumidified, and then becomes dry air to the condenser 67 where it is heated to become high-temperature and low-humidity air.

  The high-temperature and low-humidity air is supplied from the air supply port 61 to the drying chamber 56 and is used for drying the clothing A therein.

JP 7-178289 A

  The clothes drying apparatus equipped with the heat pump device is used as an evaporation source of the refrigeration cycle by dehumidifying the moisture of the garment A wetted by the evaporator 66, and an electric input for driving the compressor 68 is added. The operation of evaporating the moisture in the clothing A by repeating the heating is repeated.

  However, in the conventional clothes drying apparatus, it takes time until the clothes A are warmed and can be used as a condensation source of the refrigeration cycle, and during this time, the pressure of the compressor 68 hardly rises.

  In particular, when the outside air temperature is low and the temperature of the clothes drying device itself is low, such as in winter, the temperature of the air circulating through the evaporator 66 and the condenser 67 constituting the refrigeration cycle and the temperature of the clothes A are also low. In order to exchange heat with the air, it is necessary to control the temperature of the refrigerant flowing through the evaporator 66 to be lower than the air temperature to obtain energy for evaporating the refrigerant from the air.

  For this reason, the temperature of the refrigerant flowing through the evaporator 66 is 0 ° C. or lower until the temperature of the circulating air reaches a certain temperature or more, and moisture condensed at the evaporator 66 at this time is frosted on the surface of the evaporator 66. Or may adhere as ice. Such a state becomes resistance of the flow of circulating air and becomes a factor that hinders heat exchange between the refrigerant and the air.

  Further, until the circulating air rises to a certain temperature, the generated frost repeatedly grows and melts on the surface of the evaporator 66 and re-freezes while the molten water flows down to the lower surface side of the evaporator 66. End up. As a result, there has been a problem that the freezing becomes a resistance of circulating air and hinders heat exchange between the refrigerant and the air.

  Furthermore, when frost or ice grows in the evaporator 66 and heat exchange between the air and the refrigerant cannot be sufficiently performed, the refrigerant is not completely evaporated but is sucked into the compressor 68 in a liquid state, and the reliability of the compressor 68 is improved. It also affects.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a clothes drying apparatus that suppresses the growth of frost and ice in an evaporator even in a situation where the outside air temperature is low.

  In order to solve the above-described conventional problems, the clothes drying apparatus of the present invention includes a temperature detection means for detecting the temperature of the evaporator or the temperature around the evaporator, and a circulation branched from the circulation duct and passed through the heat source device. A bypass duct for introducing air to the heat source device is provided, and when the temperature detecting means detects a temperature not more than a set value, switching is performed so that the circulating air flowing from the circulation duct to the water tank side flows to the bypass duct. A damper is provided.

  Further, the clothes drying apparatus of the present invention includes a temperature detecting means for detecting the temperature of the evaporator or the temperature around the evaporator, and a condenser for a predetermined time when the temperature detecting means detects a temperature equal to or lower than a set value. An electromagnetic valve is provided for flowing the refrigerant before passing through the evaporator before the pressure is reduced.

  Furthermore, the clothes drying apparatus of the present invention includes a temperature detecting means for detecting the temperature of the evaporator or the surroundings of the evaporator, and when the temperature detecting means detects a temperature lower than a set value, the pressure is reduced after passing through the condenser. An electromagnetic valve is provided that controls the refrigerant before flowing to the auxiliary condenser constituting the heat source device and then to the expansion valve.

  Further, the clothes drying apparatus of the present invention includes a temperature detection means for detecting the evaporator or a temperature around the evaporator, and a refrigerant discharged from the compressor when the temperature detection means detects a temperature equal to or lower than a set value. Is provided with an electromagnetic valve that is controlled to flow to an auxiliary condenser constituting the heat source device and then to the condenser.

By these, the temperature fall of the evaporator at the time of low outside air temperature can be blunted or raised, and the conditions on which frost does not easily adhere to the evaporator can be formed. As a result, when the water evaporated from the clothing adheres to the evaporator, it is possible to suppress the supercooling and attach the water, to suppress a decrease in drying efficiency and to shorten the drying time, It is possible to reduce power consumption.

  The present invention suppresses the temperature drop of the clothes in the rotating drum by preventing the evaporator from freezing even when the evaporator is operated under a condition where the evaporator is easily frozen, such as at a low outside air temperature. As a result, the drying time and power consumption can be reduced. In addition, it inhibits the obstruction of the evaporation of the refrigerant due to clogging caused by the freezing of the evaporator, suppresses the return of the liquid refrigerant to the compressor, and prevents the compressor from being damaged due to the liquid compression. It is something that can be done.

The longitudinal cross-sectional view of the diagonal drum type washing-drying machine in Embodiment 1 of this invention Schematic diagram showing the system configuration of the oblique drum type washing and drying machine The control pattern figure which shows the control contents at the time of the low outside temperature in the same drum type washing / drying machine The control pattern figure which shows the control content at the time of the low outside temperature of the diagonal drum type washing-drying machine in Embodiment 2 of this invention The schematic diagram which shows the system configuration | structure of the diagonal drum type washing-drying machine in Embodiment 3 of this invention. The control pattern figure which shows the control contents at the time of low outside air temperature in the same drum type washing and drying machine The schematic diagram which shows the system configuration | structure of the diagonal drum type washing-drying machine in Embodiment 4 of this invention. The control pattern figure which shows the control contents at the time of low outside air temperature in the same drum type washing and drying machine The schematic diagram which shows the system configuration | structure of the diagonal drum type washing-drying machine in Embodiment 5 of this invention. The control pattern figure which shows the control contents at the time of low outside air temperature in the same drum type washing and drying machine Sectional view of a drum-type clothes dryer showing a conventional example

  The invention according to claim 1 is a main body provided with a bottomed cylindrical water tank, a rotary drum rotatably disposed in the water tank, and a garment or the like placed on the rotary drum. A clothes drying device comprising an opening that enables opening, a lid that opens and closes the opening, and an air circulation device that circulates air in the water tank, wherein the air circulation device cools at least the circulating air A heat source device for heating, a circulation duct provided across the heat source device and having both ends opened into the water tank, and a circulation provided in the heat source device for circulating air from the heat source device into the water tank It is composed of a blower, and further includes a bypass duct that branches from the circulation duct and guides the circulating air that has passed through the heat source device to the heat source device. The heat source device includes a compressor, a condenser, an expansion valve, and an evaporator. Equipped A medium circulation circuit, further comprising a temperature detection means for detecting the temperature of the evaporator or the periphery of the evaporator, and an air volume control means for controlling the amount of circulating air flowing in the circulation duct, and the air volume control means Is configured to include a switching damper that switches the circulating air flowing from the circulation duct to the water tank to flow to the bypass duct when the temperature detection means detects a temperature that is equal to or lower than a set value.

By adopting such a configuration, the temperature of the evaporator became a temperature equal to or lower than a set value at the start of operation under conditions where the evaporator is likely to be low, such as at low outside air temperature, or during operation of the clothes drying apparatus. In this case, the amount of circulating air can be reduced to suppress the rapid temperature drop of the evaporator, and the time for the evaporator temperature to be 0 ° C. or less can be shortened as much as possible, thereby causing frost to adhere to the evaporator. Can be difficult.

  As a result, an increase in ventilation resistance of the circulating air can be suppressed, and a decrease in heat exchange efficiency between the refrigerant and air can be suppressed. In addition, since the water evaporated from the clothes easily adheres to the evaporator in a liquid state before becoming frost, the drying time of the clothes and the like can be shortened, and the power consumption required for drying can be reduced. . In addition, it inhibits the refrigerant's evaporative action from being blocked due to clogging associated with the freezing of the evaporator, and suppresses the return of liquid refrigerant to the compressor, thereby preventing damage to the compressor caused by liquid compression. It is something that can be done.

  According to a second aspect of the present invention, in the first aspect of the present invention, when the circulating blower is a once-through type blower, and the temperature detecting means detects a temperature equal to or lower than a set value, the circulating blower is kept at a predetermined time. It is intended to rotate in the reverse direction.

  As a result, the heat of the condenser can be directly applied to the evaporator, so that the rapid temperature drop of the evaporator can be blunted and frost formation on the evaporator can be suppressed. As a result, it is possible to suppress the heat exchange action of the evaporator from being hindered due to freezing of moisture, to suppress a decrease in drying efficiency, to suppress a prolonged drying time, and to reduce power consumption Can be measured.

  The invention described in claim 3 is a main body having a bottomed cylindrical water tank, a rotary drum rotatably disposed in the water tank, and a garment or the like placed on the rotary drum. A clothes drying device comprising an opening that enables opening, a lid that opens and closes the opening, and an air circulation device that circulates air in the water tank, wherein the air circulation device cools at least the circulating air A heat source device for heating, a circulation duct provided on both sides of the heat source device and having both ends opened in the water tank, and provided in the heat source device or the circulation duct, and air from the heat source device is passed into the water tank. A temperature detecting unit configured by a circulating fan that circulates, the heat source device including a refrigerant circuit including a compressor, a condenser, an expansion valve, and an evaporator, and further detecting a temperature around the evaporator or the evaporator. means , When the temperature detecting means detects a temperature below the set value is the refrigerant before being vacuum has passed a predetermined time the condenser that is provided an electromagnetic valve to flow to the evaporator.

  As a result, the temperature in the circulation duct can be increased in a short time, and even if the drying operation is started after a predetermined time, the rapid temperature drop of the evaporator is blunted to the evaporator. Frosting can be suppressed. As a result, it is possible to suppress the heat exchange action of the evaporator from being hindered due to freezing of moisture, to suppress a decrease in drying efficiency, to suppress a prolonged drying time, and to reduce power consumption Can be measured.

  According to a fourth aspect of the present invention, there is provided a main body provided with a bottomed cylindrical water tank, a rotating drum rotatably disposed in the water tank, and a garment or the like placed on the rotating drum. A clothes drying device comprising an opening that enables opening, a lid that opens and closes the opening, and an air circulation device that circulates air in the water tank, wherein the air circulation device cools at least the circulating air A heat source device for heating, a circulation duct provided on both sides of the heat source device and having both ends opened in the water tank, and provided in the heat source device or the circulation duct, and air from the heat source device is passed into the water tank. The heat source device is constituted by a refrigerant circulation circuit including a compressor, a condenser, an expansion valve, an evaporator, and an auxiliary condenser provided so as to be able to exchange heat with the evaporator. In addition, Temperature detecting means for detecting the temperature around the generator or the evaporator, and when the temperature detecting means detects a temperature that is equal to or lower than a set value, the refrigerant that has passed through the condenser and has not been depressurized is supplied to the auxiliary condenser. An electromagnetic valve that is controlled to flow to the expansion valve after the flow is provided.

  As a result, when the temperature of the evaporator becomes equal to or lower than a set value, the opening / closing control of the electromagnetic valve is performed, and heat exchange (heat transfer) between the auxiliary condenser and the evaporator can be performed. As a result, it is possible to raise the temperature of the evaporator, suppress the temperature drop of the evaporator, suppress frosting on the evaporator, shorten the drying time, and reduce the power consumption.

  The invention according to claim 5 is a main body provided with a bottomed cylindrical water tank, a rotary drum rotatably disposed in the water tank, and a garment or the like placed on the rotary drum. A clothes drying device comprising an opening that enables opening, a lid that opens and closes the opening, and an air circulation device that circulates air in the water tank, wherein the air circulation device cools at least the circulating air A heat source device for heating, a circulation duct provided on both sides of the heat source device and having both ends opened in the water tank, and provided in the heat source device or the circulation duct, and air from the heat source device is passed into the water tank. The heat source device is constituted by a refrigerant circulation circuit including a compressor, a condenser, an expansion valve, an evaporator, and an auxiliary condenser provided so as to be able to exchange heat with the evaporator. In addition, A temperature detecting means for detecting the temperature around the generator or the evaporator, and when the temperature detecting means detects a temperature below a set value, the refrigerant discharged from the compressor is caused to flow to the auxiliary condenser, and thereafter An electromagnetic valve that is controlled to flow to the condenser is provided.

  As a result, when the temperature of the evaporator becomes equal to or lower than a set value, the opening / closing control of the electromagnetic valve can be performed, and heat exchange (heat transfer) between the auxiliary condenser and the evaporator can be performed. As a result, it is possible to raise the temperature of the evaporator, suppress the temperature drop of the evaporator, suppress frosting on the evaporator, shorten the drying time, and reduce the power consumption. In particular, when the refrigerant flowing to the auxiliary condenser is the refrigerant discharged from the compressor, the temperature of the evaporator can be quickly increased, and the time for switching to the drying operation can be shortened.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a longitudinal sectional view of an oblique drum type washing and drying machine according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram showing a system configuration of the oblique drum type washing and drying machine. FIG. 3 is a control pattern diagram showing control contents at a low outside air temperature in the oblique drum type washing and drying machine.

  As shown in FIG. 1, a bottomed cylindrical water tank 3 elastically supported by a plurality of suspensions 2 is provided inside a main body 1 constituting a washing and drying machine. The vibration is absorbed by the suspension 2.

  Inside the water tank 3, there are provided a plurality of through holes 5 a in the peripheral wall, and a bottomed cylindrical and horizontal axis type rotary drum 5 that accommodates the clothes 4 is rotatably provided. Is done. Further, an opening 1a for taking in and out the garment 4 and a door 7 for opening and closing the garment 4 are provided on the front surface of the main body 1.

  Furthermore, the front side of the water tank 3 and the rotary drum 5 have similar openings 3a and 5b, respectively. The opening 3a of the water tank 3 is watertight with the opening 1a of the main body 1 by appropriate means such as a bellows 8 or the like. It is connected. A seal member 12 is provided between the water tank 3 and the rotating drum 5 to partition the opening 3a side and the bottom side in a space formed by the water tank 3 and the rotating drum 5. The seal member 12 is arranged with a minute interval so as not to contact the rotating drum 5. Further, a drain port 3 b for discharging the washing water in the water tank 3 is provided at the bottom of the water tank 3, and is connected to a drain hose 10 having a drain valve 9.

  As shown in FIG. 2, the circulation blower 11 constituting the blower means includes a fan 11 a and a motor 11 b that drives the fan 11 a and is incorporated in the heat pump device 13.

  The heat pump device 13 includes a compressor 24 configured such that the rotation speed is controlled by an inverter control or the like and the capacity can be changed, a condenser (heat radiator) 16, and an electric expansion valve 25 capable of adjusting the degree of pressure reduction. In this configuration, the evaporator (heat absorber) 14 is connected in a ring shape by piping, and the refrigerant discharged from the compressor 24 circulates as is well known, and exchanges heat with the air passing through the condenser 16 and the evaporator 14, respectively. It is configured to be performed. The condenser 16 and the evaporator 14 are fin-and-tube heat exchangers having a well-known configuration.

  And the heat pump apparatus 13 is arrange | positioned at the lower part of the back surface 1c of the main body 1, and the evaporator 14 and the condenser 16 are adjoiningly accommodated and arrange | positioned in the heat exchange air path 18 which comprises this heat pump apparatus 13. FIG. Inside the heat exchange air passage 18, there are a heat absorber air passage 15 through which air flows from the direction of the arrow b to the evaporator 14 and a heat radiator air passage 17 through which air flows from the condenser 16 in the direction of the arrow c. Is provided.

  Further, the heat absorber air passage 15 is connected to the other end of the exhaust duct 21 whose one end is opened to the water tank 3, and the heat radiator air passage 17 is connected to the discharge side of the circulation fan 11 via a discharge duct 19. Thus, one end is connected to the other end of the air supply duct 20 opened in the water tank 3.

  In the middle of the exhaust duct 21, a filter 22 that captures laundry waste, yarn waste, etc. that scatters with drying is detachably provided.

  Here, the heat exchange air passage 18, the discharge duct 19, the air supply duct 20, and the exhaust duct 21 correspond to the circulation duct of the present invention.

  Further, a bypass duct 31 that connects the discharge duct 19 and the exhaust duct 21 is provided near the heat pump device 13. A switching damper 27 that controls the airflow to the bypass duct 31 is provided at a branch portion of the bypass duct 31 and the discharge duct 19 and a branch portion of the bypass duct 31 and the exhaust duct 21.

  Further, the evaporator 14 disposed in the heat exchange air passage 18 is provided with a temperature sensor (temperature detection means) 23 for detecting the temperature of the evaporator 14. This temperature sensor 23 may detect the temperature of the air around the evaporator 14.

  Further, a compressor 24, an electric expansion valve 25, and a control device 26 that controls the operation of the blower 11 are provided at appropriate positions of the main body 1.

  The control device 26 controls the operation of the blower 11, the ability of the compressor 24, the degree of pressure reduction of the electric expansion valve 25, and the switching operation of the switching damper 27 according to the temperature detected by the temperature sensor 23. During operation of the washing / drying machine, when the temperature sensor 23 detects a temperature equal to or lower than the set value, a timer function for switching the switching damper 27 to a specific operation for a predetermined time is provided.

  Next, main operations of the washing / drying machine having the above-described configuration will be described. Here, the operation described below is a case where the operation is performed under conditions where the outside air temperature (ambient temperature of the washing and drying machine) is relatively high and frost formation is unlikely to occur in the evaporator 14. The drying air is controlled to flow to the discharge duct 19 on the side indicated by A.

  In the washing (washing) process, water is supplied into the water tank 3 by opening a water supply valve (not shown) with the drain valve 9 closed. Water is supplied into the water tank 3 until a predetermined water level is reached, and the drive motor 6 is driven to rotate the clothes 4 and the rotating drum 5 containing the washing water to perform washing.

  When the washing is completed, the drain valve 9 is opened to drain the water in the water tank 3 from the drain hose 10 to the outside of the washing dryer.

  Also, in the rinsing step after the next washing, water is supplied into the water tub 3 in the same manner as the above-described washing step, and then the garment 4 is rinsed by rotating the rotating drum 5. Open and drain the water in the water tank 3 from the drain hose 10 to the outside of the washing and drying machine.

  In the next dewatering step, the drain valve 9 is opened to drain the water in the water tank 3 from the drain hose 10 to the outside of the washing and drying machine, and then the rotating drum 5 containing the clothes 4 is fastened in one direction by the drive motor 6. It spins and dehydrates by its centrifugal force.

  And when the above-mentioned dehydration process is completed, it will move to a drying process. In this drying process, the compressor 24 of the heat pump device 13 is operated. As a result, the refrigerant is compressed by the compressor 24 and circulates through the condenser 16, the electric expansion valve 25, which is a decompression means, and the evaporator 14 by the pressure. In the condenser 16, heat is released by the compression of the refrigerant, and in the evaporator 14, the heat is absorbed by the refrigerant that has been decompressed by the electric expansion valve 25 and becomes a low pressure.

  In parallel with this, the circulation blower 11 is operated, and the drying air is supplied from the heat exchange air passage 18 into the water tank 3 (rotating drum 5) through the air supply duct 20.

  That is, the drying air blown by the circulating blower 11 flows from the exhaust duct 21 to the heat sink air passage 15 as shown by arrows a and b in FIGS. 1 and 2, and evaporates as shown by an arrow c. As shown by the arrow d, it passes through the condenser 14 and the condenser 16, passes through the exhaust duct 19, flows into the supply duct 20, and is supplied to the water tank 3 from the supply duct 20 ( It flows into the water tank 3 via a not shown).

  Then, it flows to the peripheral wall side of the rotating drum 5 in the water tank 3, is blocked by the seal member 12, flows into the rotating drum 5 from a large number of through holes 5 a as indicated by an arrow e, and is external to the water tank 3 as indicated by an arrow f. Through the exhaust duct 21 (not shown) through the exhaust duct 21 and return to the heat sink air passage 15 of the heat exchange air passage 18, and the flow described above is performed for a predetermined time.

  In this state, the drying air is cooled when it passes through the evaporator 14, and the moisture condensed thereby adheres to the surface of the evaporator 14, and becomes low-temperature, low-humidity air, and the condenser 16 pass. When passing through the condenser 16, the drying air is heated and heated, and is supplied into the rotary drum 5 from the water tank 3 as air having a low relative humidity.

  At this time, the rotary drum 5 is rotationally driven by the drive motor 6, and the garment 4 is stirred up and down.

  Therefore, the warm air (drying air) supplied into the rotary drum 5 by the circulation blower 11 deprives moisture when passing through the gap between the clothes 4 and exhausts it through the exhaust port of the water tank 3 in a moist state. It flows from the duct 21 to the heat exchange air passage 18 and reaches the heat absorber air passage 15 and the evaporator 14.

When the wet warm air passes through the evaporator 14 as described above, sensible heat and latent heat are deprived and dehumidified, separated into dry air and condensed water, heated again by the condenser 16 and heated. It becomes wind and is supplied into the water tank 3 and the rotating drum 5, and the above-described circulation is repeated thereafter.

  On the other hand, when condensed condensed water adheres to the evaporator 14 and saturates and falls, it is stored in a water storage chamber (not shown) provided in the lower part and pumped up by a drain pump (not shown). It is discharged from the drain hose 10 to the outside of the machine.

  In this way, by using the heat pump device 13 for drying the clothing 4 and the like, the heat absorbed by the evaporator 14 is recovered by the refrigerant and again radiated by the condenser 16, and the amount of heat greater than the input energy of the compressor 24 is obtained. Since it can give to the clothing 4, a drying efficiency can be improved. Therefore, shortening of drying time and energy saving can be realized.

  On the other hand, when the outside air temperature is lower than the set value, when the heat pump device 13 is operated at the same degree of decompression at the so-called low outside air temperature, the evaporator 14 becomes transiently low in temperature, and as a result, contains moisture such as the clothing 4. When the drying air passes through the evaporator 14, the moisture becomes frost and adheres to the evaporator 14. If the operation is continued in this state, the evaporator 14 is frozen and moisture cannot be condensed.

  Next, a drying operation in the case where the temperature around the evaporator 14 is in a low outside air temperature state, for example, 5 ° C. or less will be described. Here, since it is the same as the above from the washing process to the dehydration process, description is abbreviate | omitted and here demonstrates a drying process. The compressor 24 is controlled by an inverter control device (not shown) based on a signal from the control device 26 so that its rotational speed (capability) is well known.

  Furthermore, in this Embodiment 1, since operation | movement of the compressor 24 and the switching damper 27 is main, description is abbreviate | omitted about operation | movement of the air blower 11 and the electrically driven expansion valve 25. FIG.

  At the beginning of the operation, the temperature sensor 23 detects the temperature of the evaporator 14 (or the vicinity thereof), and the compressor 24 is started in synchronization with the blower 11 and the like by the control device 26 (FIG. 3).

  When the compressor 24 is operated, the refrigerant flows through the condenser 16, the electric expansion valve 25, and the evaporator 14, and returns to the compressor 24. Due to the continuation of the refrigerant flow, the temperature of the condenser 16 gradually increases, and the temperature of the evaporator 14 gradually decreases.

  As shown in FIG. 3, when the outside air temperature is in a low temperature state, for example, 5 ° C. or less, the temperature of the evaporator 14 is remarkably decreased, and the temperature sensor 23 detects a set temperature (for example, 5 ° C.). Then, the control device 26 operates the switching damper 27.

  That is, the switching damper 27 is operated in the broken line state of FIG. 2 for a preset time ΔT1 until the temperature of the evaporator 14 rises to a predetermined temperature (expected to rise). As a result, the air path of the drying air changes from the side indicated by A to the side indicated by B, resulting in a short air path configuration that passes through the bypass duct 31.

  Therefore, the circulation amount of the drying air decreases, and in addition to this, the capacity of the compressor 24 is controlled, so that the time during which the evaporator 14 is at a temperature of 0 ° C. or less is suppressed (shortened). As a result, frost formation and freezing caused by moisture adhering to the evaporator 14 are also suppressed.

  Therefore, the heat exchange action with the drying air in the evaporator 14 is also continued, and the adverse effect of sucking the liquid refrigerant into the compressor 24 due to the gasification of the refrigerant is suppressed. In other words, as the length of the circulation air passage becomes shorter, the temperature of the condenser 16 becomes higher and the temperature of the circulating air also becomes higher.

  When the time ΔT1 elapses, the control device 26 drives the switching damper 27 to reach the position indicated by the solid line. As a result, the air path of the drying air is switched from the side indicated by B to the side indicated by A, and the normal operation described in the above drying process is performed.

  Since this state is set to a value at which the heat pump device 13 can exhibit high efficiency, both the heat release amount and the heat absorption amount by the heat pump device 13 are increased, and the humidity of the drying air is lowered to increase the drying efficiency. it can.

  In this state, when the temperature of the circulating drying air (the temperature of the evaporator 14) decreases again, as shown by ΔT2 in FIG. 3, the control device 26 operates the switching damper 27 again, and the predetermined time ΔT2 The frosting and freezing of the moisture contained in the drying air circulating during the period to the evaporator 14 are suppressed.

  As a result, it is possible to prevent the drying operation from being significantly reduced. In this case, it is preferable to reduce the rotational speed (capacity) of the compressor 24 in the rotational speed characteristics of the compressor 24 in FIG. 3 or to stop the operation of the compressor 24. Such a control can be expected to have an effect of suppressing breakage of the compressor 24 caused by liquid compression by suppressing the return of the liquid refrigerant to the compressor 24, particularly when the compressor 24 capable of capacity control is used. .

  Further, in the use state of the washing / drying machine, it has been in a low outside air temperature state from the start of operation, and when the control is performed as shown in FIG. Although the temperature may be 0 ° C. or less, in any case, it is possible to cope with the problem by detecting the temperature of the evaporator 14, and the decrease in drying efficiency due to frosting and freezing of the evaporator 14 is suppressed. can do.

  Moreover, although the compressor 24 was demonstrated as what the rotation speed (capability) is controlled by an inverter control apparatus etc., it is good also as a constant speed compressor. Furthermore, although the air blower 11 has been described as a constant air flow rate, the rotation speed (capacity) may be controlled by an inverter control device or the like.

(Embodiment 2)
Next, a second embodiment will be described. FIG. 4 is a control pattern diagram showing control contents at the time of low outside air temperature of the oblique drum type washing and drying machine in the second embodiment of the present invention.

  Here, since the configuration of the washing / drying machine and the operation content related to washing are the same as those in the first embodiment, the drying process is different from that of the first embodiment with reference to FIGS. The control contents will be mainly described. Moreover, about the fan 11a of the air blower 11, it is set as the structure using the cross-flow type fan which consists of a known structure from the relationship of the control demonstrated below.

  By the drying operation start operation, the compressor 24 is started with a frequency conversion operation, and the heat pump device 13 starts a predetermined heat exchange action. At this time, the switching damper 27 is in a state indicated by a solid line, and the operation of the blower 11 is performed from the forward rotation, and the operation of switching to the reverse rotation by the timer function of the control device 26 is performed. To a predetermined time (a time during which a rapid temperature drop of the evaporator 14 can be detected) can be set to be driven by reverse rotation with a small air volume.

When the temperature of the air flowing through the heat exchange air passage 18 is high, the blower 11 is activated in the forward rotation and the predetermined drying operation described in the first embodiment is performed. When the outside air temperature is low, the temperature sensor 23 detects the temperature of the evaporator 14, and when the temperature is lower than the above set value (for example, 5 ° C.), the control device 26 turns the circulation fan. 11 rotation is reversed, and measurement of the predetermined time ΔT1 is started by the timer function of the control device 26, and the compressor 24 is continuously operated.

  Further, along with the temperature detection, the switching damper 27 also operates from the solid line state to the broken line state, and the air path of the drying air changes from the side indicated by A to the side indicated by B, and the short wind passing through the bypass duct 31 The road configuration.

  Therefore, the circulation amount of the drying air decreases, and in addition to this, the capacity of the compressor 24 is controlled, so that the time during which the evaporator 14 is at a temperature of 0 ° C. or less is suppressed (shortened). As a result, frost formation and freezing caused by moisture adhering to the evaporator 14 are also suppressed.

  Therefore, the heat exchange action with the drying air in the evaporator 14 is also continued, and the adverse effect of sucking the liquid refrigerant into the compressor 24 due to the gasification of the refrigerant is suppressed. In other words, as the length of the circulation air passage becomes shorter, the temperature of the condenser 16 becomes higher and the temperature of the circulating air also becomes higher.

  When the predetermined time ΔT1 elapses, the control device 26 switches the rotation of the blower 11 to the normal rotation, and the switching damper 27 is driven to the side indicated by the solid line to indicate the air path of the drying air indicated by B. To the side indicated by A, and the normal operation described in the drying step of the first embodiment is performed.

  As is well known, the once-through fan 11a has characteristics that are set in accordance with forward rotation. In the case of reverse rotation, the air blowing direction does not change and the air blowing capacity is reduced.

  Therefore, after the above-described time ΔT1 has elapsed, the normal operation is performed, and in this state, the heat pump device 13 exhibits high efficiency, the heat dissipation amount and the heat absorption amount by the heat pump device 13 both increase, and the humidity of the drying air is reduced. Decrease and increase drying efficiency.

  In this state, when the temperature of the circulating drying air (the temperature of the evaporator 14) decreases again, as shown by ΔT2 in FIG. By controlling and operating the switching damper 27 to the broken line side, frosting and freezing of the moisture contained in the drying air for a predetermined time ΔT2 on the evaporator 14 are suppressed.

  As a result, it is possible to prevent the drying operation from being significantly reduced. In this case, it is preferable to reduce the rotational speed (capacity) of the compressor 24 in the rotational speed characteristics of the compressor 24 in FIG. 4 or to stop the operation of the compressor 24.

  According to such control, the switching damper 27 controls the drying air to flow to the bypass duct 31 side so that the length of the circulation air passage is shortened. In addition, the rotation direction of the circulation fan 11 is controlled. By reducing the circulating air volume, the rapid temperature drop of the evaporator 14 is dulled so that it does not become minus temperature, and the water evaporated from the clothing 4 in the rotating drum 5 is easily attached to the evaporator 14 as water droplets. can do.

  Therefore, the drying time can be shortened and the power consumption can be reduced. In addition, inhibition of refrigerant evaporation due to clogging or the like due to freezing of the evaporator 14 is suppressed, and return of the liquid refrigerant to the compressor 24 is suppressed, so that the compressor 24 is damaged due to liquid compression. Can be suppressed.

Moreover, although the compressor 24 was demonstrated as what the rotation speed (capability) is controlled by an inverter control apparatus etc., it is good also as a constant speed compressor. Furthermore, although the blower 11 has been described as a configuration in which the amount of blown air is reduced by reversely rotating a fan at a constant speed, the rotation speed (capability) may be controlled by an inverter control device or the like.

(Embodiment 3)
Next, Embodiment 3 will be described. FIG. 5 is a schematic diagram showing a system configuration of the oblique drum type washing and drying machine according to the third embodiment of the present invention. FIG. 6 is a control pattern diagram showing control contents at a low outside air temperature in the oblique drum type washing and drying machine. Here, since the main configuration of the washing / drying machine is the same as that of the first embodiment, FIG. 1 is used for the respective configuration requirements, and the configuration different from the first and second embodiments and the drying process are described. The control content will be mainly described. The circulation blower 11 will be described as being at a constant speed where the air volume cannot be varied, but it is also possible to use a fan whose air volume is varied.

  In the third embodiment, the air passage through which the drying air circulates is constituted by the heat exchange air passage 18, the discharge duct 19, the air supply duct 20, and the exhaust duct 21 by eliminating the bypass duct 31. Further, the configuration in which the electromagnetic valve 28 controlled by the control device 26 is connected in parallel with the electric expansion valve 25, and the control contents associated with this configuration are different from those of the first and second embodiments. Normally, the electromagnetic valve 28 is controlled to be closed.

  In such a configuration, when the drying operation is started, the compressor 24 and the blower 11 are driven as in the first embodiment, and the refrigerant from the compressor 24 is supplied from the condenser 16, the electric expansion valve 25, the evaporator 14, and the compression. Circulate with machine 24. Further, the drying air circulates from the radiator air passage 17 of the heat exchange air passage 18 to the discharge duct 19, the air supply duct 20, the water tank 3, the rotating drum 5, the exhaust duct 21, and the heat absorber air passage 15, and the rotating drum The clothes 4 in 5 are dried.

  When the circulating air temperature for drying flowing through the heat exchange air passage 18 is low, the temperature sensor 23 detects the temperature of the evaporator 14 and detects a temperature lower than a set value (for example, 5 ° C.). Then, the ΔT1 electromagnetic valve 28 is opened for a predetermined time by the timer function of the control device 26, and the compressor 24 is in a driven state.

  As a result, the refrigerant discharged from the compressor 24 passes through the electromagnetic valve 28 from the condenser 16, flows as hot gas to the evaporator 14 without being decompressed, and returns to the compressor 24 again.

  As a result, during the predetermined time ΔT1, the temperatures of the evaporator 14 and the condenser 16 are increased, and the circulating air temperature is relatively increased. Then, after the predetermined time ΔT1 has elapsed, the solenoid valve 28 returns to the closed state and returns to normal operation. In this state, the circulating air for drying is in a heated state, and the moisture contained in the drying air adheres to the evaporator 14 due to condensation due to a decrease in the temperature of the evaporator 14. Since the temperature drop of the evaporator 14 is dull, frost formation is suppressed.

  Therefore, the time for the evaporator 14 to become 0 ° C. or less is shortened, the moisture adhering to the evaporator 14 is also suppressed from becoming frost, and a decrease in drying efficiency is suppressed. As a result, the drying time can be shortened and the amount of power consumption can be reduced. In addition, inhibition of refrigerant evaporation due to clogging or the like due to freezing of the evaporator 14 is suppressed, and return of the liquid refrigerant to the compressor 24 is suppressed, so that the compressor 24 is damaged due to liquid compression. Can be suppressed.

  Such control is not limited to the time when the operation of the drying process is started. As shown by ΔT2 in FIG. 6, even when the temperature of the evaporator 14 falls below the set value during the drying operation, the same is true for the predetermined time ΔT2. It can be controlled.

In the third embodiment, the circulation blower 11 is provided in the heat pump device 13. However, as shown by the broken line in FIG. 5, the circulation blower 11 may be arranged in the exhaust duct 21 or the air supply duct 20. it can.

(Embodiment 4)
Next, a fourth embodiment will be described. FIG. 7 is a schematic diagram showing a system configuration of an oblique drum type washer / dryer according to Embodiment 4 of the present invention. FIG. 8 is a control pattern diagram showing control contents at a low outside air temperature in the oblique drum type washing and drying machine. Here, since the main configuration of the washing and drying machine is the same as that of the first embodiment, FIG. 1 is used for the respective configuration requirements, and the configuration different from the previous first to third embodiments and the drying process are described. The control content will be mainly described. The circulation blower 11 will be described as being at a constant speed where the air volume cannot be varied, but it is also possible to use a fan whose air volume is varied.

  In the fourth embodiment, the air passage through which the drying air circulates is constituted by the heat exchanger air passage 18, the discharge duct 19, the air supply duct 20, and the exhaust duct 21 by eliminating the bypass duct 31. The point is the same as in the third embodiment. In addition, an electromagnetic valve 29 controlled by the control device 26 is provided in series with the electric expansion valve 25, an electromagnetic valve 28 controlled by the control device 26 is provided in parallel with the electromagnetic valve 29, and the electromagnetic valve 28 is electrically operated. The point from which the piping to the connection part located between the type | formula expansion valve 25 and the solenoid valve 29 was arrange | positioned so that heat | fever exchange (heat transfer) with the evaporator 14 was different from previous Embodiment 1-3. . Here, in the following description, a part of the pipe that exchanges heat with the evaporator 14 will be referred to as an auxiliary condenser 30. Normally, the solenoid valve 28 is controlled to be closed and the solenoid valve 29 is controlled to be open.

  In this configuration, when the drying operation is started, the compressor 24 and the blower 11 are driven as in the first embodiment, and the refrigerant from the compressor 24 is supplied from the condenser 16, the electromagnetic valve 29, the electric expansion valve 25, and the evaporation. It circulates with the compressor 14 and the compressor 24. Further, the drying air circulates from the radiator air passage 17 of the heat exchange air passage 18 to the discharge duct 19, the air supply duct 20, the water tank 3, the rotating drum 5, the exhaust duct 21, and the heat absorber air passage 15, and the rotating drum The clothes 4 in 5 are dried.

  When the circulating air temperature for drying flowing through the heat exchange air passage 18 is low, the temperature sensor 23 detects the temperature of the evaporator 14 and detects a temperature lower than a set value (for example, 5 ° C.). Then, by the timer function of the control device 26, the ΔT1 electromagnetic valve 28 is opened for a predetermined time, and the electromagnetic valve b29 provided in front of the electric expansion valve 25 is closed.

  As a result, the refrigerant discharged from the compressor 24 flows from the condenser 16 through the electromagnetic valve 28 to the auxiliary condenser 30 and comes into contact (heat exchange) with the evaporator 14, and then from the electric expansion valve 25 to the evaporator. 14 and return to the compressor 24. Therefore, during the predetermined time ΔT1, the temperature of the evaporator 14 rises and the circulating air temperature rises relatively. And after predetermined time (DELTA) T1 progress, the solenoid valve 29 will open | release, the solenoid valve 28 will return to a obstruction | occlusion state, and it will return to a normal drying operation. In this state, the circulating air for drying is in a heated state, and the moisture contained in the drying air adheres to the evaporator 14 due to condensation due to a decrease in the temperature of the evaporator 14. Since the temperature drop of the evaporator 14 is dull, frost formation is suppressed.

  Therefore, the time for the evaporator 14 to become 0 ° C. or less is shortened, the moisture adhering to the evaporator 14 is also suppressed from becoming frost, and a decrease in drying efficiency is suppressed. As a result, the drying time can be shortened and the power consumption can be reduced. In addition, inhibition of refrigerant evaporation due to clogging or the like due to freezing of the evaporator 14 is suppressed, and return of the liquid refrigerant to the compressor 24 is suppressed, so that the compressor 24 is damaged due to liquid compression. Can be suppressed.

  Such control is not limited to the time when the operation of the drying process is started. As shown by ΔT2 in FIG. 8, even when the temperature of the evaporator 14 falls below the set value in the middle of the drying operation, the same applies for the predetermined time ΔT2. It can be controlled.

  In the fourth embodiment, the circulation blower 11 is provided in the heat pump device 13. However, as shown by the broken line in FIG. 7, the circulation blower 11 may be arranged in the exhaust duct 21 or the air supply duct 20. it can.

(Embodiment 5)
Next, a fifth embodiment will be described. FIG. 9 is a schematic diagram showing a system configuration of the oblique drum type washing and drying machine in the fifth embodiment of the present invention. FIG. 10 is a control pattern diagram showing control contents at a low outside air temperature in the oblique drum type washing and drying machine. Here, since the main configuration of the washing / drying machine is the same as that of the first embodiment, FIG. 1 is used for the respective configuration requirements, and the configuration and the drying process are different from those of the first to fourth embodiments. The control content will be mainly described. The circulation blower 11 will be described as being at a constant speed where the air volume cannot be varied, but it is also possible to use a fan whose air volume is varied.

  In the fifth embodiment, the air passage through which the drying air circulates is constituted by the heat exchanger air passage 18, the discharge duct 19, the air supply duct 20, and the exhaust duct 21 by eliminating the bypass duct 31. The point is the same as in the third and fourth embodiments. Further, an electromagnetic valve 29 controlled by the control device 26 is provided between the compressor 24 and the condenser 16, an electromagnetic valve 28 controlled by the control device 26 is provided in parallel with the electromagnetic valve 29, and the electromagnetic valve Unlike the first to fourth embodiments, the pipes from 28 to the connection part located between the condenser 16 and the electromagnetic valve 29 are arranged so as to be able to exchange heat (heat transfer) with the evaporator 14. Yes. Here, in the following description, a part of the pipe that exchanges heat with the evaporator 14 will be referred to as an auxiliary condenser 30. Normally, the solenoid valve 28 is controlled to be closed and the solenoid valve 29 is controlled to be open.

  In such a configuration, when the drying operation is started, the compressor 24 and the blower 11 are driven as in the first embodiment, and the refrigerant from the compressor 24 is supplied from the electromagnetic valve 29, the condenser 16, the electric expansion valve 25, and the evaporation. It circulates with the compressor 14 and the compressor 24. Further, the drying air circulates from the radiator air passage 17 of the heat exchange air passage 18 to the discharge duct 19, the air supply duct 20, the water tank 3, the rotating drum 5, the exhaust duct 21, and the heat absorber air passage 15, and the rotating drum The clothes 4 in 5 are dried.

  When the circulating air temperature for drying flowing through the heat exchange air passage 18 is low, the temperature sensor 23 detects the temperature of the evaporator 14 and detects a temperature lower than a set value (for example, 5 ° C.). Then, by the timer function of the control device 26, the ΔT1 electromagnetic valve 28 is opened for a predetermined time, and the electromagnetic valve 29 is closed.

  As a result, the refrigerant discharged from the compressor 24 flows through the electromagnetic valve 28 to the auxiliary condenser 30 and contacts (heat exchange) with the evaporator 14, and then the condenser 16, the electric expansion valve 25, and the evaporator 14. , And returns to the compressor 24. Therefore, during the predetermined time ΔT1, the temperature of the evaporator 14 rises and the circulating air temperature rises relatively. Then, after a predetermined time ΔT1 has elapsed, the solenoid valve 28 is closed, the solenoid valve 29 is returned to the open state, and the normal drying operation is resumed. In this state, the circulating air for drying is in a heated state, and the moisture contained in the drying air adheres to the evaporator 14 due to condensation due to a decrease in the temperature of the evaporator 14. Since the temperature drop of the evaporator 14 is dull, frost formation is suppressed.

  Therefore, the time for the evaporator 14 to become 0 ° C. or less is shortened, the moisture adhering to the evaporator 14 is also suppressed from becoming frost, and a decrease in drying efficiency is suppressed. As a result, the drying time can be shortened and the amount of power consumption can be reduced. In addition, inhibition of refrigerant evaporation due to clogging or the like due to freezing of the evaporator 14 is suppressed, and return of the liquid refrigerant to the compressor 24 is suppressed, so that the compressor 24 is damaged due to liquid compression. Can be suppressed.

  Such control is not limited to the time when the operation of the drying process is started. Even when the temperature of the evaporator 14 falls below the set value during the drying operation as shown by ΔT2 in FIG. It can be controlled.

  In the fifth embodiment, the circulation blower 11 is provided in the heat pump device 13, but it may be arranged in the exhaust duct 21 or the air supply duct 20 as shown by a broken line in FIG. .

  As described above, the clothes drying apparatus according to the present invention reduces the temperature of the evaporator when the temperature of the drying air circulating is low, such as at a low outside air temperature, and the temperature of the evaporator falls below a set value. By raising, it prevents clogging due to freezing of the evaporator and suppresses a decrease in drying efficiency, and it can be used for drying applications such as grains in addition to drying clothes.

DESCRIPTION OF SYMBOLS 1 Main body 1a Opening part 3 Water tank 4 Clothes 5 Rotating drum 7 Door (lid body)
11 Blower (circulating fan)
13 Heat pump device (heat source device)
14 Evaporator 16 Condenser 18 Heat Exchange Air Path (Circulation Duct)
19 Discharge duct (circulation duct)
20 Air supply duct (circulation duct)
21 Exhaust duct (circulation duct)
23 Temperature sensor (temperature detection means)
24 Compressor 25 Electric expansion valve 26 Controller 27 Switching damper 28 Solenoid valve 29 Solenoid valve 30 Auxiliary condenser 31 Bypass duct

Claims (5)

A main body provided with a bottomed cylindrical water tank, a rotating drum rotatably disposed in the water tank, an opening provided in the main body and allowing clothes or the like to be put into the rotating drum, A clothes drying apparatus comprising a lid that opens and closes an opening, and an air circulation device that circulates air in the water tank, wherein the air circulation device includes at least a heat source device that cools and heats the circulating air, and the heat source. A circulation duct provided on both sides of the apparatus and having both ends opened in the water tank; a circulation fan provided in the heat source apparatus for circulating air from the heat source apparatus into the water tank; and A bypass duct is provided that branches from the duct and guides the circulating air that has passed through the heat source device to the heat source device, and the heat source device includes a refrigerant circulation circuit including a compressor, a condenser, an expansion valve, and an evaporator. In addition, there are provided temperature detecting means for detecting the temperature of the evaporator or the periphery of the evaporator, and an air volume control means for controlling the amount of circulating air flowing in the circulation duct. A clothing drying device comprising a switching damper that switches the circulating air flowing from the circulation duct to the water tank to flow to the bypass duct when a temperature equal to or lower than a set value is detected. The clothes drying apparatus according to claim 1, wherein the circulation fan is a once-through fan, and the circulation fan is reversely rotated for a predetermined time when the temperature detecting unit detects a temperature equal to or lower than a set value. A main body provided with a bottomed cylindrical water tank, a rotating drum rotatably disposed in the water tank, an opening provided in the main body and allowing clothes or the like to be put into the rotating drum, A clothes drying apparatus comprising a lid that opens and closes an opening, and an air circulation device that circulates air in the water tank, wherein the air circulation device includes at least a heat source device that cools and heats the circulating air, and the heat source. A circulation duct provided on both sides of the apparatus and having both ends opened in the water tank, and a circulation fan provided in the heat source apparatus or the circulation duct for circulating air from the heat source apparatus into the water tank, The heat source device includes a refrigerant circulation circuit including a compressor, a condenser, an expansion valve, and an evaporator, and further includes a temperature detection unit that detects a temperature around the evaporator or the evaporator, and the temperature detection unit. When it detects a value below the temperature, the clothes drying device provided with a solenoid valve for flowing the refrigerant before being decompressed passing through a predetermined time the condenser to the evaporator. A main body provided with a bottomed cylindrical water tank, a rotating drum rotatably disposed in the water tank, an opening provided in the main body and allowing clothes or the like to be put into the rotating drum, A clothes drying apparatus comprising a lid that opens and closes an opening, and an air circulation device that circulates air in the water tank, wherein the air circulation device includes at least a heat source device that cools and heats the circulating air, and the heat source. A circulation duct provided on both sides of the apparatus and having both ends opened in the water tank, and a circulation fan provided in the heat source apparatus or the circulation duct for circulating air from the heat source apparatus into the water tank, The heat source device comprises a compressor, a condenser, an expansion valve, an evaporator, and a refrigerant circulation circuit provided with an auxiliary condenser provided so as to be able to exchange heat with the evaporator, and further, around the evaporator or the evaporator Temperature detecting means for detecting temperature; and when the temperature detecting means detects a temperature equal to or lower than a set value, the refrigerant that has passed through the condenser and has not been depressurized is caused to flow to the auxiliary condenser, and then the expansion valve Clothing drying device provided with an electromagnetic valve that is controlled to flow to A main body provided with a bottomed cylindrical water tank, a rotating drum rotatably disposed in the water tank, an opening provided in the main body and allowing clothes or the like to be put into the rotating drum, A clothes drying apparatus comprising a lid that opens and closes an opening, and an air circulation device that circulates air in the water tank, wherein the air circulation device includes at least a heat source device that cools and heats the circulating air, and the heat source. A circulation duct provided on both sides of the apparatus and having both ends opened in the water tank, and a circulation fan provided in the heat source apparatus or the circulation duct for circulating air from the heat source apparatus into the water tank, The heat source device comprises a compressor, a condenser, an expansion valve, an evaporator, and a refrigerant circulation circuit provided with an auxiliary condenser provided so as to be able to exchange heat with the evaporator, and further, around the evaporator or the evaporator A temperature detecting means for detecting temperature, and when the temperature detecting means detects a temperature lower than a set value, the refrigerant discharged from the compressor is caused to flow to the auxiliary condenser and then to the condenser. Clothing drying device provided with a solenoid valve to control.

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