JP6092004B2 - Clothes dryer - Google Patents

Description

  The present embodiment relates to a clothes dryer.

  2. Description of the Related Art Conventionally, clothes dryers equipped with a heat pump for drying clothes such as laundry have attracted attention because they have better drying efficiency and energy saving effects than those equipped with heaters for heating.

  In a clothes dryer equipped with a heat pump, a circulation air passage communicating with a drying chamber containing clothes is provided, and a blower for circulating the air in the drying chamber through the circulation air passage and the evaporation of the heat pump are provided in the circulation air passage. A condenser and a condenser are provided.

  The heat pump includes a compressor that compresses and discharges the refrigerant, a condenser that dissipates and liquefies the high-temperature and high-pressure gas refrigerant discharged from the compressor, and a decompression unit that decompresses the refrigerant that has passed through the condenser. An evaporator that vaporizes the liquefied refrigerant is sequentially connected by piping, and the refrigerant is circulated by driving the compressor.

  Then, the air in the circulation air passage heated by the heat released from the condenser is sent into the drying chamber, and the air deprived of moisture from the clothing is dehumidified by cooling in the evaporator in the circulation air passage. The clothes are dried by repeatedly heating the air again with a condenser and supplying the air to the drying chamber.

  By the way, in the clothes dryer as described above, when the temperature of the installation atmosphere is low as in winter, the temperature of the air flowing in the circulation air passage is low immediately after the start of the heat pump operation. So-called frost formation may occur in which the water condensed at the temperature of 0 ° C. or lower freezes. When frost forms on the evaporator, the frost acts as a resistance of the air passing through the evaporator and the amount of air flowing through the circulation air passage is reduced, so that the drying performance is lowered and the air heated by the condenser is sufficient for the evaporator. In some cases, the frosting of the evaporator proceeds and the drying performance is further deteriorated.

  On the other hand, when the means for detecting the temperature of the evaporator detects a temperature below a predetermined value, the air that has passed through the heat pump is switched to flow to the bypass duct, and the heat pump is not supplied to the drying chamber. It has been proposed to prevent the evaporator from frosting by performing an operation to return to the reverse or by reversing the blower (for example, see Patent Document 1 below).

JP 2011-24659 A

  However, in the case where it is determined to start the control for preventing the frost formation of the evaporator based on the temperature of the evaporator as described above, the frost formation of the evaporator does not proceed, but the already attached frost does not melt. When the heat supplied to the evaporator from the air heated by the condenser is balanced with the heat of vaporization of the refrigerant, the temperature of the air flowing through the circulation air passage does not rise and the clothes are hardly dried Since this cannot be detected, the drying time may be long.

  The present invention has been made in consideration of the above circumstances, and even in a situation where frost formation is likely to occur in the evaporator, the heat pump is used until the temperature of the air flowing through the circulation air path reaches a temperature suitable for drying clothes. An object of the present invention is to provide a clothes dryer that can quickly start up and suppress wasteful drying time.

  The clothes dryer according to the present embodiment includes a drying chamber for storing clothes, a circulation air passage connected to the drying chamber, a blower for circulating air into the drying chamber through the circulation air passage, and the circulation air passage. A condenser that heats the air in the interior, an evaporator that cools and dehumidifies the air in the circulation air passage, a compressor that compresses the refrigerant and supplies the refrigerant to the condenser, and depressurizes the refrigerant that has passed through the condenser A heat pump comprising a pressure reducing means, an outside air temperature sensor for detecting the temperature of the installation atmosphere, and a control means for controlling the operation of the blower and the heat pump, the control means at the start of the heat pump, When the temperature of the installation atmosphere detected by the outside air temperature sensor is lower than a predetermined temperature, the blower is rotated at a higher rotational speed than a normal rotational speed for rotating the blower when the temperature is equal to or higher than the predetermined temperature. To.

It is a perspective view from the front of the clothes dryer concerning a 1st embodiment. It is sectional drawing which shows schematically the internal structure of a clothes dryer. It is a perspective view from the back which shows the state except the outer box of the clothes dryer. It is a schematic block diagram of a clothes dryer. It is a block diagram which shows the electric constitution of a clothes dryer. It is the table which showed the relationship between the temperature of installation atmosphere, and the rotation speed of an air blower. It is a figure which shows the rotation speed of the air blower in the drying process of the washing / drying machine concerning 1st Embodiment, and the detection temperature of various temperature sensors. It is the table which showed the relationship between the temperature of the installation atmosphere of the clothes dryer concerning the example of a change of 1st Embodiment, and the rotation speed of an air blower. It is the table which showed the relationship between the temperature of the installation atmosphere of the clothes dryer concerning 2nd Embodiment, and the rotation speed of an air blower. It is the table which showed the relationship between the temperature of the installation atmosphere of the clothes dryer concerning the example of a change of 2nd Embodiment, and the rotation speed of an air blower. It is the table which showed the relationship between the temperature of the installation atmosphere of the clothes dryer concerning the other modification of 2nd Embodiment, and the rotation speed of an air blower.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  The present embodiment relates to a drum-type washing and drying machine that serves as both a washing machine and a clothes dryer as shown in FIGS. 1 and 2, and is provided in a substantially rectangular box-like outer box 1 and a lower part thereof. An outer shell is formed from the base plate 2. The front portion 1a of the outer box 1 has an upwardly inclined shape, and a laundry doorway 3 including a circular opening is formed at a substantially central portion thereof. A door 4 is provided on the front surface 1 a of the outer box 1 through a hinge 5 so as to be pivotable in the lateral direction, and the laundry doorway 3 is opened and closed by the door 4. An operation display panel 6 for setting various operations of the washing machine and displaying the operation status is provided above the laundry entrance / exit 3 on the front surface 1a, and a drawer type detergent is placed on the side of the operation display panel 6. Case 7 is provided.

  As shown in FIG. 2, a substantially cylindrical water tank 8 having an open front surface and a closed rear surface is disposed in the outer box 1. The aquarium 8 is elastically supported on the base plate 2 in such a manner that the axial direction of the aquarium 8 is a horizontal axis in the front-rear direction and is slightly inclined rearward so that the front opening communicates with the laundry entrance 3. It is elastically supported via the mechanism 9.

  The water tank 8 is supplied with water such as tap water from the outside of the water supply port 70 provided at the upper part of the water tank 8 through the water supply valve 18, and the drain valve 19 from the drain port 73 provided at the bottom of the water tank 8. It is comprised so that the water in the water tank 8 can be drained out of the apparatus. The water tank 8 is provided with a hot air outlet 10 at the top of the front end and a hot air inlet 11 at the top of the rear end, in addition to the front opening, the water supply port 70 and the drain port 73.

  A cylindrical rotating drum 14 whose front surface is open and whose rear surface is closed is rotatably disposed in the water tank 8. The rotary drum 14 is disposed in the water tank 8 in a state where the axial direction is a horizontal axis in the front-rear direction and is slightly inclined downward. A number of holes 15 through which water and air can be passed are formed in the peripheral wall of the rotating drum 14, and the inside of the rotating drum 14 communicates with the water tank 8 through the holes 15. A plurality of baffles 16 are provided on the inner peripheral wall of the rotating drum 14. The front opening of the rotating drum 14 is also communicated with the laundry entrance 3, and the rotating drum 14 accommodates clothes put in from the laundry entrance 3. The rotating drum 14 is rotationally driven by a motor 17 provided on the back surface of the water tank 8. The rotating drum 14 having such a configuration functions as a washing tub during the washing stroke, as a dehydrating tub during the dehydration stroke, and as a drying chamber for storing clothes during the drying stroke.

  As shown in FIGS. 2 to 4, a circulating air passage 20 is connected to the hot air outlet 10 and the hot air inlet 11 provided in the water tank 8, and the water tank 8 (rotating drum) is connected through the circulating air path 20. 14) The air inside can be circulated. The circulation air passage 20 includes a return air duct 24 connected to the hot air outlet 10 of the water tank 8, an air supply duct 30 connected to the hot air inlet 11 of the water tank 8, a lower end of the return air duct 24, and an air supply duct. The heat exchange duct 22 which connects the lower end of 30 is provided.

  The heat exchange duct 22 is placed on the base plate 2 positioned below the water tank 8, and is disposed inside the evaporator 34 and spaced from the evaporator 34 to the downstream side of the heat exchange duct 22. A condenser 35 and a blower 26 that circulates and supplies the air in the water tank 8 through the circulation air passage 20 are disposed.

  The evaporator 34 and the condenser 35 are tube-shaped with fins in which a large number of heat transfer fins are arranged at a predetermined pitch on the refrigerant distribution pipe, and the air in the water tank 8 is blown by the blower action of the blower 26 as shown in FIG. 4 flows in the circulation air passage 20 as indicated by arrows and flows between the heat transfer fins of the evaporator 34 and the condenser 35.

  As shown in FIG. 4, the evaporator 34 and the condenser 35 are a heat pump together with a compressor 36 that compresses the refrigerant supplied to the condenser 35, and a decompression means 37 that includes a capillary tube that decompresses the refrigerant discharged from the condenser 35. 38 is constructed. In the present embodiment, a case where a capillary tube is used as the decompression means 37 will be described, but a flow rate control valve may be used instead of the capillary tube.

  The heat pump 38 is configured by connecting a compressor 36, a condenser 35, a decompression means 37, and an evaporator 34 in this order through a connection pipe to constitute a refrigeration cycle. By the operation of the compressor 36, the refrigerant circulates. The evaporator 34 cools and dehumidifies the air flowing in the heat exchange duct 22, and the condenser 35 heats the air dehumidified by the evaporator 34. The compressor 36 and the decompression means 37 are disposed outside the heat exchange duct 22.

  Various sensors such as a drum inlet temperature sensor 28 and a drum outlet temperature sensor 32 are disposed inside the circulation air passage 20. The drum inlet temperature sensor 28 is disposed in the air supply duct 30 and detects the temperature of air heated by exchanging heat with the condenser 35. The drum outlet temperature sensor 32 is provided in the return air duct 24 located between the hot air outlet 10 and the evaporator 34 and detects the temperature of the air flowing into the circulation air path 20 from the water tank 8.

  In the heat pump 38, a condenser temperature sensor 40 that detects the temperature of the condenser 35 is provided in the condenser 35, and an evaporator temperature sensor 42 that detects the temperature of the evaporator 34 is provided in the vicinity of the refrigerant outlet of the evaporator 34. It has been.

  In addition, an outside air temperature sensor 43 that detects the temperature (outside air temperature) Tr of the installation atmosphere of the washing and drying machine is provided inside the outer box 1.

  FIG. 5 shows the control device 13. The control device 13 includes, for example, a microcomputer and a memory, and is arranged inside the outer box 1 so as to function as control means for controlling the overall operation of the washing / drying machine.

  Various operation signals are input to the control device 13 from various operation switches provided on the operation display panel 6, and temperature detection signals are input from the temperature sensors 28, 32, 40, 42, and 43, respectively. It is like that.

  Then, the control device 13 connects the water supply valve 18, the motor 17, the blower 26, the compressor 36, and the drain valve 19 via the drive circuit 44 based on the input of the various signals and the control program stored in the memory in advance. Control.

  Next, an example of the operation of the washing / drying machine having the above configuration will be described.

  First, a schematic operation of the washing / drying machine will be described. When the user operates the operation button on the operation display panel 6 to set the course of operation and instructs the start of the operation, the washing and drying machine performs the washing operation, the drying operation according to the set operation course, or A washing / drying operation is performed in which both operations are continued. As one of them, when the execution of the washing and drying operation is started, the washing process, the dehydrating process, and the drying process are executed in order.

  In the washing process, after supplying water into the water tank 8 by opening the water supply valve 18, an operation of rotating the rotating drum 14 at a low speed is performed. In the dehydration process, after the drain valve 19 is opened and the water in the water tank 8 is discharged, the rotating drum 14 is rotated at a high speed.

  In the drying process, the control device 13 operates the motor 17 to wash, and supplies hot air into the rotating drum 14 while rotating the rotating drum 14 containing the wet clothes after rinsing in both forward and reverse directions at a low speed. Is performed.

The operation of supplying the hot air into the rotary drum 14 is performed by operating the heat pump while driving the blower 26, but the control device 13 starts the operation of the compressor 36 and activates the heat pump 38. The outside air temperature Tr is detected by the air temperature sensor 43, and the rotational speed of the blower 26 is determined according to the detected temperature Tr. In this embodiment, the control device 13 sets the blower 26 that is set when the heat pump 38 is operating stably when the outside air temperature Tr at the time of activation of the heat pump 38 becomes lower than a predetermined temperature according to a table as shown in FIG. Is set to a rotational speed higher than the normal rotational speed N ₀ (typically, for example, 4600 rpm).

Specifically, the control device 13 sets the rotational speed of the blower 26 to be higher than the normal rotational speed N ₀ when the external air temperature Tr detected by the external air temperature sensor 43 when the heat pump 38 is started is 10 ° C. or higher and lower than 15 ° C. The rotation speed is set to N ₁ (for example, 4800 rpm), and is set to the rotation speed N ₂ (for example, 5000 rpm) when the temperature is 5 ° C. or more and less than 10 ° C., and the rotation speed is N ₃ (for example, 5300 rpm) when the temperature is less than 5 ° C. Set to. When the outside air temperature Tr detected by the outside air temperature sensor 43 is 15 ° C. or higher, the control device 13 sets the rotation speed of the blower 26 to the same rotation speed as the normal rotation speed N ₀ .

  When the heat pump 38 is activated, the refrigerant sealed in the heat pump 38 is compressed by the compressor 36 to become a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows into the condenser 35 to exchange heat with the air in the heat exchange duct 22. To do. As a result, the air in the heat exchange duct 22 is heated, and the refrigerant is cooled and liquefied. The liquefied refrigerant is then depressurized through the depressurizing means 37 and then flows into the evaporator 34 to be vaporized, whereby the evaporator 34 cools the air in the heat exchange duct 22. The refrigerant that has passed through the evaporator 34 returns to the compressor 36 and is compressed again to become a high-temperature and high-pressure refrigerant.

  By the operation of the heat pump 38 and the blower 26 described above, the air that has entered the rotating drum 14 from the water tank 8 becomes moisture-containing by drying the clothes, and this moist air is circulated from the hot air outlet 10 to the circulating air. After flowing into the heat exchange duct 22 of the passage 20, it is cooled and dehumidified by the evaporator 34, and then heated by the condenser 35 and warmed.

  The hot air heated by the condenser 35 is supplied from the hot air inlet 11 into the water tank 8 through the air supply duct 30, and is further supplied from the hole 15 into the rotating drum 14. The hot air supplied into the rotary drum 14 is circulated so as to flow into the heat exchange duct 22 from the hot air outlet 10 through the return air duct 24 after drying the clothes by removing moisture from the clothes. .

Then, when a predetermined time t1 (for example, 30 minutes) has elapsed from the time when the heat pump 38 is started, the control device 13 sets the blower set when the heat pump 38 is started when the outside air temperature Tr when the heat pump 38 starts is less than 5 ° C. the rotational speed N ₃ of the 26 reduced to a lower rotational speed N ₂ which, predetermined time further from the start time has elapsed the heat pump 38 a predetermined time period t1 t2 (e.g., 50 minutes) has elapsed, the blower 26 The number of revolutions N ₂ is further reduced to the number of revolutions N _1, and the number of revolutions of the blower 26 is reduced stepwise according to the elapsed time from the start of the heat pump 38.

Further, when the outside temperature Tr at the time of starting the heat pump 38 is 5 ° C. or more and less than 10 ° C., the control device 13 reduces the rotational speed N ₂ of the blower 26 to a lower value after a predetermined time t1 has elapsed since the start of the heat pump 38. lowering the rotational speed N _1, a predetermined time t2 from the start of the heat pump 38 has elapsed, is lowered to further the rotational speed N ₀ of the rotational speed N ₁ of the blower 26, the outside air temperature Tr at the time of starting of the heat pump 38 is 10 ° C. When the temperature is lower than 15 ° C., the rotational speed N ₁ of the blower 26 is decreased to the rotational speed N ₀ when the predetermined time t2 has elapsed since the heat pump 38 was started. In addition, when the outside temperature Tr at the time of starting of the heat pump 38 is higher than 15 ° C., the control device 13 holds the rotation speed of the blower 26 at the normal rotation speed N ₀ regardless of the elapsed time from the start of the heat pump 38.

  Next, the effect | action of the control apparatus 13 in a drying process is demonstrated based on FIG. FIG. 7 is a diagram showing the rotation speed of the blower 26 and the detected temperatures of various temperature sensors in the drying process. Here, the outside air temperature Tr detected by the outside air temperature sensor 43 when the heat pump 38 is started is 5 ° C. or more and 10 ° C. The case of less than ℃ is illustrated.

Based on the outside air temperature Tr detected by the outside air temperature sensor 43 and the table shown in FIG. 6, the control device 13 rotates the blower 26 at the rotation speed N ₂ and starts the operation of the compressor 36 to turn on the heat pump 38. Start up and start the drying process.

  The temperature of the air in the evaporator 34, the condenser 35, and the circulating air passage 20 immediately before the operation of the compressor 36 is substantially equal to the outside air temperature Tr, but when the operation of the compressor 36 is started, the evaporator Since the liquid refrigerant flows into 34 and vaporizes rapidly, the temperature of the evaporator 34 may suddenly drop to 0 degrees or less, and the evaporator 34 is likely to be frosted.

In this embodiment, the rotation speed of the blower 26 is set to a rotation speed N ₂ higher than the normal rotation speed N _0, and the amount of heat exchanged between the evaporator 34 and the air circulating in the circulation air passage 20 can be increased. Therefore, the temperature drop of the evaporator 34 can be suppressed and frost formation of the evaporator 34 can be prevented, and the amount of air (air volume) circulating through the circulation air passage 20 does not decrease. As a result, the air heated by exchanging heat with the condenser 35 is sufficiently circulated in the circulation air passage 20, so that the circulation air passage 20 detected by the drum inlet temperature sensor 28 and the drum outlet temperature sensor 32 As the circulating air temperature rises, the temperatures of the evaporator 34 and the condenser 35 provided in the heat exchange duct 22 of the circulation air passage 20 also rise.

  Then, when a predetermined time t1 has elapsed since the start of the heat pump 38, the temperature of the air circulating in the circulation air passage 20 has risen to some extent as compared to the start, and to secure the amount of heat for preventing the evaporator 34 from frosting. Since the necessary air volume decreases, the rotational speed of the blower 26 is reduced. When the predetermined time t2 elapses from when the heat pump 38 is started, the temperature of the air circulating in the circulation air passage 20 is further increased, and thus the rotational speed of the blower 26 is further decreased.

In the present embodiment as described above, at the time of startup of the heat pump 38, the outside air temperature Tr detected by the outside air temperature sensor 43 is lower than a predetermined temperature, for rotating the blower 26 at a higher than normal rotational speed N ₀ rpm Even when the outside air temperature Tr is low, the amount of heat given to the evaporator 34 by the air circulating through the circulation air passage 20 can be increased to prevent the evaporator 34 from frosting, and the circulation air passage 20 circulates. It is possible to prevent a reduction in the amount of air (air volume). Therefore, the temperature of the air circulating through the circulation air passage 20 detected by the drum inlet temperature sensor 28 and the drum outlet temperature sensor 32 reaches a temperature suitable for drying clothes at an early stage, and the heat pump can be quickly started up.

  In addition, when the predetermined time t1 has elapsed since the heat pump 38 was started, the rotational speed of the blower 26 is reduced, so that the rotational speed of the blower 26 is reduced while ensuring the amount of heat necessary to prevent the evaporator 34 from frosting. Therefore, power consumption and noise caused by the blower 26 can be reduced.

  In this embodiment, after the heat pump 38 is started, the rotational speed of the blower 26 is decreased stepwise. However, as illustrated in FIG. 8, the rotational speed determined at the time of starting the heat pump 38 until the drying process is completed. The fan 26 may continue to rotate.

  Further, in this embodiment, the outside air temperature Tr is divided into a plurality of temperature zones, and the rotation speed of the blower 26 set for each temperature zone is determined in advance, but the rotation speed set for each temperature zone is at least that In the temperature zone, it can be determined from the amount of air that can ensure the amount of heat necessary for preventing the evaporator 34 from frosting at a temperature lower than that temperature zone. For example, as the rotational speed of the blower 26 set when the outside air temperature Tr at the start of the heat pump 38 is 5 ° C. or more and less than 10 ° C., at least 5 ° C., preferably outside air having a lower temperature (for example, 3 ° C.). Under the temperature, it is possible to set the number of revolutions so that the evaporator 34 can be prevented from frosting by performing experiments in advance.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to the drawings.

In the first embodiment described above, at the time of startup of the heat pump 38, the outside air temperature Tr detected by the outside air temperature sensor 43 is lower than the predetermined temperature, rotating the blower 26 at a higher rotational speed than the normal rotational speed N _0, then The rotational speed of the blower 26 is decreased stepwise in accordance with a predetermined time from the start of the heat pump 38. In this embodiment, as shown in FIG. 9, the evaporator detected by the evaporator temperature sensor 42 is used. Based on the temperature Te of 34, the rotation speed of the blower 26 is reduced stepwise.

Specifically, as in the first embodiment, the control device 13 first determines that the outside air temperature Tr detected by the outside air temperature sensor 43 when the heat pump 38 is started is 15 ° C. or higher and is 10 ° C. or higher and lower than 15 ° C. In the case of 5 ° C. or more and less than 10 ° C., when the temperature is less than 5 ° C., the rotation speed of the blower 26 is set to the normal rotation speed N ₀ , the rotation speed N ₁ , the rotation speed N ₂ , and the rotation speed N ₃ , respectively.

And when the outside temperature Tr at the time of starting of the heat pump 38 is less than 5 degreeC, the control apparatus 13 WHEREIN: The temperature Te of the evaporator 34 detected by the evaporator temperature sensor 42 after starting of the heat pump 38 is 2 degreeC or more and less than 4 degreeC When becomes, the rotational speed N ₃ of the blower 26 is lowered to a lower rotational speed N ₂ which further further reduce the rotational speed N ₁ when the temperature Te of the evaporator 34 becomes equal to or higher than 4 degrees.

Further, when the outside temperature Tr at the time of starting the heat pump 38 is 5 ° C. or more and less than 10 ° C., the control device 13 determines that the temperature Te of the evaporator 34 detected by the evaporator temperature sensor 42 after the heat pump 38 is started is 2 ° C. or more. When the temperature is lower than 4 ° C., the rotational speed N ₂ of the blower 26 is reduced to a lower rotational speed N _1, and when the outside air temperature Tr at the time of starting the heat pump 38 is 10 ° C. or higher and lower than 15 ° C. When the temperature Te of the evaporator 34 detected by the air temperature sensor 42 becomes 2 ° C. or higher and lower than 4 ° C., the rotational speed N ₁ of the blower 26 is lowered to a normal rotational speed N ₀ lower than this.

  In this embodiment, since the rotational speed of the blower 26 is reduced when the temperature Te of the evaporator 34 becomes higher than a predetermined temperature, the rotational speed of the blower 26 is reduced while confirming that the evaporator 34 is not frosted. Therefore, power consumption and noise caused by the blower 26 can be reduced. Other configurations and operational effects are the same as those of the first embodiment, and detailed description thereof is omitted.

  In the present embodiment, when the temperature Te of the evaporator 34 detected by the evaporator temperature sensor 42 becomes higher than a predetermined temperature according to the table illustrated in FIG. Although the case where the set rotation speed of the blower 26 is decreased stepwise has been described, the temperature Tc of the condenser 35 detected by the condenser temperature sensor 40 is greater than a predetermined temperature according to the table illustrated in FIG. Then, the rotational speed of the blower 26 is decreased stepwise, or the circulating wind heated by exchanging heat with the condenser 35 detected by the drum inlet temperature sensor 28 according to a table illustrated in FIG. When the temperature Tdi of the air in the path 20 becomes higher than a predetermined temperature, the rotational speed of the blower 26 may be decreased stepwise. Even in such a case, the rotational speed of the blower 26 can be reduced while securing the amount of heat necessary to prevent the evaporator 34 from frosting, and the power consumption and noise by the blower 26 can be reduced. Can do.

  As mentioned above, although embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 10 ... Warm air outlet, 11 ... Warm air inlet, 13 ... Control apparatus, 14 ... Rotating drum, 20 ... Circulation air path 22 ... Heat exchange duct, 24 ... Return air duct, 26 ... Blower, 28 ... Drum inlet temperature sensor, DESCRIPTION OF SYMBOLS 30 ... Air supply duct, 32 ... Drum exit temperature sensor, 34 ... Evaporator 35 ... Condenser, 36 ... Compressor, 37 ... Decompression means, 38 ... Heat pump, 40 ... Condenser temperature sensor, 42 ... Evaporator temperature sensor, 43 ... Outside air temperature sensor

Claims (6)

A drying room for housing clothing;
A circulation air passage connected in communication with the drying chamber;
A blower for circulating air into the drying chamber through the circulation air passage;
A condenser that heats the air in the circulation air passage, an evaporator that cools and dehumidifies the air in the circulation air passage, a compressor that compresses a refrigerant and supplies the refrigerant to the condenser, and a condenser. A heat pump comprising a decompression means for decompressing the refrigerant,
An outside air temperature sensor that detects the temperature of the installation atmosphere;
Control means for controlling the operation of the blower and the heat pump,
When the temperature of the installation atmosphere detected by the outside air temperature sensor is lower than a predetermined temperature at the start of the heat pump, the control means has a higher rotational speed than the normal rotational speed for rotating the blower when the temperature is higher than the predetermined temperature. A clothes dryer characterized by rotating the blower.   The said control means reduces the rotation speed of the said air blower when predetermined time passes after starting the said heat pump after rotating the said air blower by the rotation speed higher than the said normal rotation speed. The clothes dryer described. An evaporator temperature sensor for detecting the temperature of the evaporator;
The control means reduces the rotational speed of the blower when the temperature of the evaporator detected by the evaporator temperature sensor becomes higher than a predetermined temperature after rotating the blower at a rotational speed higher than the normal rotational speed. The clothes dryer according to claim 1 or 2. A condenser temperature sensor for detecting the temperature of the condenser;
The control means reduces the rotational speed of the blower when the temperature of the condenser detected by the condenser temperature sensor becomes higher than a predetermined temperature after rotating the blower at a rotational speed higher than the normal rotational speed. The clothes dryer of any one of Claims 1-3 characterized by the above-mentioned. A circulating air temperature sensor for detecting the temperature of the air circulating in the circulating air passage;
When the temperature of the air circulating through the circulating air path detected by the circulating air temperature sensor becomes higher than a predetermined temperature after rotating the blower at a rotational speed higher than the normal rotational speed, the control means The clothes dryer according to any one of claims 1 to 4, wherein the rotational speed is reduced.   The clothes dryer according to any one of claims 1 to 5, wherein the decompression means is a capillary tube.

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