JP2007082864A - Clothes dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a clothes dryer which enables easier realization of a stable drying operation along with the curtailment of the power consumption with a heat pump type heating source using an environmentally tender natural refrigerant by improving the efficiency of the heating system for drying clothes. <P>SOLUTION: The dryer is provided with a heat pump which has a compressor 21, a condenser 22, a squeezing means 24 and an evaporator 25 so linked with a pipeline as to circulate the refrigerant through them. An air duct is so arranged as to make air flow sequentially through a feed air port 10 provided in a body 1, the inside of the body, the condenser 22, a drying chamber 3, the evaporator 25 and an exhaust port 9 provided in the body 1. The compressor 21 is disposed inside the body near the feed air port 10 to use waste heat of the compressor 21 as a drying heat source. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a clothes dryer for drying clothes and a clothes dryer having a washing function.

  Heat sources used in conventional clothes dryers include heaters and heat pumps. The heater method consumes a large amount of power and has a problem such as deterioration and shrinkage of clothing because it is dried by applying warm air of about 100 ° C. to the clothing. In addition, there are problems such as large power consumption and lack of energy saving. On the other hand, the heat pump type is more efficient and consumes less power than the heater type because it is dried using the latent heat of the refrigerant. Moreover, the warm air which hits clothes can also be restrained low compared with a heater system, and there is little deterioration and shrinkage | contraction of clothes.

  As a conventional clothes dryer using a heat pump for clothes drying, as shown in FIGS. 6 and 7, there is one in which an air passage for circulating a condenser, a rotating drum, and an evaporator is configured (for example, see Patent Document 1). ). In this clothes dryer, the temperature of the air flowing from the condenser to the rotating drum does not rise immediately after the start of the drying operation. Therefore, immediately after the operation starts, the refrigerant is circulated through the auxiliary evaporator installed outside the clothes dryer. Heat is used to improve the starting characteristics.

  As another conventional clothes dryer, as shown in FIG. 8, an air path for circulating a condenser, a rotating drum, and an evaporator is formed, and exhausted along the air path from the rotating drum to the evaporator. There is one in which an air passage is configured so as to suppress an increase in the operating pressure of the heat pump by providing a mouth and an air supply port (for example, see Patent Document 2).

JP-A-1-212599 JP 2004-329755 A

However, the above-described conventional clothes dryer uses a heat pump, and the air path is configured so that air circulates through the condenser, the drying chamber, and the evaporator. Therefore, there is a problem that the drying time becomes long.
On the other hand, another conventional clothes dryer is devised so as to improve the starting characteristics by providing an air supply port and an exhaust port in a duct between the drying drum and the evaporator. However, although the air supply / exhaust amount is adjusted by a blower installed in the duct, it cannot be easily adjusted to a desired air temperature and air volume, and it is not easy to obtain stable operation control.

  The present invention has been made to solve the above-described problems, and improves the efficiency of the heating method for drying clothes and reduces the amount of power consumed by a heat pump type heating source using an environmentally friendly natural refrigerant. It is another object of the present invention to provide a clothes dryer that can easily realize a stable drying operation.

  A heat pump comprising a compressor, a condenser, a throttle means, and a heat pump connected by a pipe line so that the refrigerant circulates, and an air path is formed so that air flows in the order of the condenser, the drying chamber, and the evaporator; A flammable refrigerant is used as the refrigerant.

  R600a is used as the refrigerant of the heat pump.

  The compressor of the heat pump uses a compressor that keeps the inside at a refrigerant compressor suction pressure.

  It is equipped with a compressor, condenser, throttling means, and a heat pump connected by a pipe line so that the refrigerant circulates in the evaporator, and the air supply port provided in the main body, inside the main body, condenser, drying chamber, evaporator, main body An air path is configured so that air flows in the order of the provided exhaust ports, and a compressor is disposed inside the main body in the vicinity of the air supply port.

  The air supply port is provided on the back surface of the main body.

  The exhaust port is provided in front of the main body.

  The exhaust port is provided on the bottom surface of the main body.

  In the heat pump, a pipe connecting the discharge part of the compressor and the evaporator inlet is provided, and an open / close valve is provided on the compressor side from the center of the pipe.

  In the heat pump, a condenser and an evaporator are provided substantially in parallel, the condenser outlet part and the evaporator outlet part are aligned in the same direction, and the throttle means is provided on the outlet part side.

  A room temperature detecting means, a condenser temperature detecting means and an evaporator temperature detecting means; the room temperature detecting means detects the room temperature to determine the rotational speed at the start of the compressor; and the condenser temperature detecting means operates the compressor. The compressor temperature is controlled by detecting the condenser temperature therein, and the defrosting operation is performed by detecting the evaporation temperature by the evaporator temperature detecting means.

  The drying load amount in the drying chamber is detected from the torque of a motor that rotates the drying chamber, and the number of rotations of the drying chamber is controlled.

  As described above, according to the present invention, the energy of the heat pump can be effectively utilized by using the exhaust heat of the compressor, so that the effect that the power consumption can be reduced is exhibited. Further, since the heat pump is controlled by detecting the room temperature, the condenser temperature, and the evaporator temperature, the effect of performing a stable operation is exhibited.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
In the present embodiment, a laundry dryer that is a clothes dryer equipped with a laundry function will be described as an example. 1 is a front perspective view showing the front structure of the washing / drying machine according to the present embodiment, FIG. 2 is a rear perspective view showing the rear structure of the washing / drying machine according to the present embodiment, and FIG. It is sectional drawing which shows the lower cross-section of the washing / drying machine which concerns on the form. In each figure, 1 is a washing / drying machine body, 2 is a water tank, 3 is a rotating drum which is a drying chamber, 4 is a drum motor, 5 is an opening / closing door, 6 is a suspension, 7 is a frame, 8 is a body air supply port, 9 is a main body exhaust port, 10 is a water tank air supply port, 11 is a water tank air supply duct, 12 is a water tank exhaust port, 13 is a water tank exhaust duct, 14 is a room temperature detection means, and 15 is a control board. Further, 21 is a compressor, 22 is a condenser, 23 is a condenser blower, 24 is a capillary tube as a throttle means, 25 is an evaporator, 26 is an evaporator blower, 27 is a condenser temperature detecting means, and 28 is an evaporator temperature. Detection means, 29 is a defrosting on-off valve, 30 is a drain pan, 31 is a condenser filter, and 32 is an evaporator filter.

  A cylindrical water tank 2 elastically supported by a suspension 6 composed of 2 to 3 dampers and springs is provided inside the main body, and the suspension 6 absorbs vibration during washing, dehydration and drying. To do. A rotating drum 3 that is a cylindrical drying chamber is provided inside the water tank 2 and is driven and rotated by a motor 4. An opening for putting clothes in and out and a door 5 that can be easily opened and closed are installed in the upper part of the front of the main body 1. An air supply port 10 is provided on the rear surface of the water tank, and a plurality of openings through which air can flow are provided on the rear surface side of the rotating drum 3. Further, the water tank exhaust port 12 is provided at a position symmetrical to the air supply port.

  A frame 7 that supports the washing / drying machine main body 1 is installed in the lower part of the main body. Inside the frame 7, a compressor 21, a condenser 22, a capillary 24 as a throttle means, and an evaporator 25 are installed, and these are sequentially connected by a pipe line to constitute a heat pump. The evaporator 25 and the condenser 22 are installed substantially in parallel according to the frame structure of the main body, and are installed so that the places where the pipes are connected are in the same direction. A capillary tube 24 is installed in the connecting pipe portion between the condenser 22 and the evaporator 25, and the connecting pipe between the capillary tube 24 and the heat exchanger (the condenser 22 and the evaporator 25) can be installed short.

  The discharge part of the compressor 21 and the downstream of the capillary tube 24 are connected by piping, and a defrosting on-off valve 29 is installed between them. During normal operation, the defrosting on-off valve 29 is closed. A drain pan 30 for receiving drain water is installed on the bottom surface of the evaporator 25, and is connected to a drainage path installed in the main body 1 by a pipe such as a resin pipe. The compressor 21 has a reciprocating type compression structure, and has a built-in motor driven by an inverter, and can adjust the compression capacity by changing the rotation speed of the piston. The condenser 22 and the evaporator 25 are provided with temperature detection means 27 and 28. In this embodiment, isobutane R600a is used as the refrigerant.

  An air supply port 8 including a plurality of openings is provided on the back surface of the main body. Air is configured to flow into the inside of the washing / drying machine from the outside of the washing / drying machine main body 1 through the air supply port 8. Inside the washing and drying machine, a motor 4 for driving the compressor 21 and the rotating drum 3, a condenser blower 23, and an evaporator blower 26 are installed, and the inflowing air can cool these heat generating devices. is there.

  The air that flows into the washing / drying machine and cools the compressor 21 and the drum motor 4 flows into the condenser 22 through the condenser filter 31 that is installed substantially in parallel, and then flows into the condenser blower 23. Has been. The condenser 22 and the condenser blower 23 are connected by a duct, and the condenser blower 23 is further connected by an air supply port 10 and a water tank air supply duct 11 at the lower back of the water tank. The water tank air supply duct 11 is installed around the rotating drum motor 4 along the motor 4 from below, and is connected to an air supply port at the bottom of the water tank. The exhaust port 9 at the front upper part of the water tank and the evaporator 25 are also connected by the water tank exhaust duct 13, and an evaporator blower 26 is installed on the opposite side. A duct is further connected from the evaporator blower 26 to the exhaust port 9 provided on the front surface of the main body, thereby forming an air passage. Since the condenser blower 23 and the evaporator blower 26 are driven by an inverter type motor, the air volume can be adjusted.

  In the present embodiment, isobutane R600a is used as the refrigerant. Since isobutane is flammable, it is necessary to suppress the charging amount of the refrigerant. Therefore, a compressor of a type that keeps the inside of the compressor at a low pressure is used to suppress the melting of the refrigerant into the refrigerating machine oil. Generally, the penetration of refrigerant into refrigeration oil decreases as the pressure decreases.

  In addition, the refrigerant present in the condenser exists as a liquid refrigerant as a result of effective utilization of latent heat energy, but the liquid refrigerant present in the connection pipe is an energy transport medium and does not greatly contribute to efficiency improvement. Therefore, the refrigerant filling amount can be reduced by configuring the connecting pipe from the condenser 22 to the capillary tube 24 to be short.

  Furthermore, the evaporator 25 and the condenser 22 are installed substantially in parallel, and are installed so that locations where pipes are connected are in the same direction. For this reason, it is possible to shorten the connecting pipe between the capillary tube 24 and the heat exchanger (the condenser 22 and the evaporator 25), and it is possible to reduce the refrigerant charging amount. If the connection part of the condenser 22 and the evaporator 25 is installed not in the same direction but in the opposite direction, and the capillary tube 24 is installed between them, the connection pipe becomes longer at least by the width of the heat exchanger, and the refrigerant charge amount Will increase.

Next, operation | movement of the drying process of the washing / drying machine which concerns on this Embodiment is demonstrated. In addition, since each process (a washing process, a dehydration process, etc.) other than a drying process is the same as that of the conventional washing machine, description is abbreviate | omitted.
The rotating drum 3 in the water tank 2 is rotated by a driving motor 4 and operated for several seconds. At this time, the torque applied to the motor 4 is calculated from the current and voltage, and the amount of drying load in the rotary drum 3 is detected. From the relationship between the detected torque and the load amount, the operation is started at the preset number of rotations of the drum 3 and the number of rotations of the condenser blower 23 and the evaporator blower 26, and then the compressor 21 is driven. At this time, the rotational speed of the compressor 21 is determined based on the temperature detected by the room temperature detecting means 14 in advance.

  The operation of the heat pump will be described with reference to the Ph diagram shown in FIGS. 3 and 4 according to the flow of the refrigerant. Alphabets A, B, C, and D in the figure indicate the state of the refrigerant, respectively. In FIGS. 3 and 4, the same symbol corresponds to the refrigerant state and the position of the heat pump. The refrigerant compressed by the compressor 21 becomes a high-temperature and high-pressure superheated vapor refrigerant (B), discharges the compressor 21, and flows into the condenser 22. In the condenser 22, the compressor 21 is cooled, and is cooled by air whose temperature has risen from room temperature to be condensed and liquefied (C).

  The refrigerant releases heat to the air, raises the air temperature, and dries the clothes in the rotating drum 3. The condensed and liquefied refrigerant is decompressed by the capillary tube 24 and flows into the evaporator 25 as a low-temperature two-phase refrigerant (D). In the evaporator 25, it is heated by the medium-temperature air that has flowed out of the rotary drum 3, and is evaporated. At this time, the air that has flowed out of the drum 3 is deprived of moisture, and the temperature also decreases. The evaporated and evaporated refrigerant is sucked into the compressor by the vapor refrigerant (A) and is compressed again to form a heat pump cycle.

  Next, the flow of air in the main body will be described. Ambient air (about 20 ° C.) flowing from the main body air inlet 8 installed on the back surface of the main body is supplied from the compressor 21 and the condenser blower 23 motor and the evaporator blower 26 installed inside the washer / dryer main body 1. Heated by the motor and the motor 4 for the rotating drum, the temperature rises to about 30 ° C. The heated air is further heated by the condenser 22 and rises to about 65 ° C.

  The heated air passes through the water tank air supply duct 11 connected to the water tank 2, and flows into the rotating drum 3 from the rear of the rotating drum 3 at a temperature of about 60 ° C. The air that flows in raises the temperature of the wet clothes in the rotating drum 3, further evaporates the water, becomes air of about 40 ° C., flows out of the rotating drum 3, and is symmetrical with the air inlet 10 of the water tank 2. It passes through the water tank exhaust duct 11 connected to the evaporator 25 from the water outlet 12 of the water tank, and flows into the evaporator 25 at about 35 ° C.

  The air that has flowed is dehydrated by the evaporator 25, the temperature is lowered to about room temperature, and is blown out of the washing / drying machine main body 1 again. FIG. 5 shows an image of air flow. The air path is configured so that air is introduced from the outside of the main body, the compressor 21 and the like are cooled, the clothes are dried from the condenser 22 by the rotary drum 23, and flow out of the main body through the evaporator 25. .

  As the drying process proceeds, clothing in the rotating drum 3 spreads throughout the drum, and the flow rate of air passing through the rotating drum decreases. At this time, the condensation temperature of the heat pump rises and tends to exceed the operating range of the compressor 21. In this case, in the present embodiment, when the temperature detected by the condensing temperature detecting means 27 installed in the condenser 22 becomes larger than a preset value, the rotational speed of the compressor 21 is decreased. Is controlled. On the other hand, when the condensation temperature becomes lower than a preset temperature, the rotation speed of the compressor 21 is controlled to increase.

  When the ambient temperature is, for example, about 0 ° C., the refrigerant temperature of the evaporator 25 may become 0 ° C. or lower during the drying operation. In that case, moisture contained in high-humidity air flowing in from the rotating drum 3 adheres as frost in the evaporator 25. As a result, the flow rate of air flowing through the evaporator 25 and the flow rate of air flowing into the rotary drum 3 are reduced, leading to a reduction in drying capacity.

  Therefore, in the present embodiment, when the temperature detected by the evaporator temperature detecting means 28 installed in the evaporator 25 becomes smaller than the value set in the control device in advance, the on-off valve 29 is opened to increase the temperature. By directly flowing the refrigerant to the evaporator 25, the frost adhered to the evaporator 25 is melted, and the moisture attached to the surface is also evaporated to control the initial air flow rate. When the temperature detected by the evaporator temperature detecting means 28 provided in the evaporator 25 becomes higher than the value set in the control device in advance, the on-off valve 29 is closed and the drying operation is restarted.

  Next, other defrosting methods will be described next. When the temperature detected by the evaporator temperature detecting means 28 installed in the evaporator 25 becomes smaller than the value set in the control device in advance, the compressor 21 is stopped and the condenser blower 23 and the evaporator blower are stopped. 26 continues operation. When the compressor 21 is stopped, the pressure of the refrigerant in the evaporator 25 increases and the temperature also increases. Further, since the air blowing operation is continued, air flows from the rotary drum 3 into the evaporator 25. The air from the rotating drum 3 has a temperature of at least 0 ° C. and can melt the frost of the evaporator 25. The frost in the evaporator 25 can be sufficiently melted by the synergistic effect with the evaporator temperature rise. When the temperature detected by the evaporator temperature detecting means 28 provided in the evaporator 25 becomes larger than the value set in the control device in advance, the compressor 21 is controlled so as to resume its operation and the drying operation.

  In particular, when the defrosting operation is performed for the first time after the start of the drying operation, the defrosting operation performed by opening the on-off valve 29 is effective. At the start of drying, a large amount of water flows into the evaporator 25 and a lot of frost is attached. In such a case, the method of melting frost strongly using the heat of the compressor 21 is advantageous. From the start of the drying operation, the compressor 21 is stopped and the air is circulated sufficiently to melt the frost sufficiently. Compared with the defrosting using the compressor 21, the power consumption is greatly reduced. There is.

  As described above, in the washing / drying machine using the heat pump, since the temperature rise due to the energy loss of the outside air, various motors generated in the washing / drying machine, the compressor 21 and the like is also used as a heating source for drying, it is very efficient. At the same time that the operation can be realized, the effect of cooling the compressor 21 has the effect of increasing the efficiency of the compressor 21 itself and improving the reliability. Similarly, the condenser blower 23, the evaporator blower 26, and the rotary drum motor 4 are also cooled, so that the efficiency is increased and the reliability is improved.

  Furthermore, the water tank air supply duct 11 that connects the water tank 2 from the condenser 22 is installed inside the main body, and since the outside air flows into the main body and is heated by the condenser 22, the water tank air supply duct 11 Heat dissipation to the inside of the body occurs. However, since the air inside the main body flows into the condenser 22, it is possible to reduce the heat loss, and the heat loss is greatly improved as compared with the conventional air circulation type configuration, and the drying time is shortened. . The water tank exhaust duct 13 has the same effect.

  Furthermore, in the present embodiment, air is taken in from the outside of the main body and heated, the clothes in the rotary drum 3 are dried, excess heat energy is recovered by the evaporator 25, and released again at about the temperature outside the main body. There is little energy loss. Furthermore, since the outside air is the basis of the heat source in the present embodiment, the discharge pressure of the compressor 21 is stable, and the heat pump can be easily operated stably. Further, it is configured so that external air is allowed to pass through each of the evaporator 25 and the condenser 22, and the outlet of the rotating drum 3 whose temperature is higher than the outside of the main body as compared with a system in which the outlet air of the condenser 22 is introduced into the rotating drum 3. Since the air flows through the evaporator 25, the evaporation temperature is high, and the flow rate of the refrigerant circulating in the heat pump is large. Therefore, the drying capacity is increased and the cycle efficiency is increased.

  Moreover, in this Embodiment, there exists an effect which suppresses the noise of the compressor 21 etc. which leak directly from the air supply opening | mouth 8 by providing the air supply position of the main body 1 in the back surface of the main body. Further, the air supply port 8 is provided on the back surface, and the compressor 21 is installed in the vicinity of the air supply port 8 in order to cool the compressor 21 efficiently. Since 21 is laid out, there is also an effect of insulating the drive sound of the compressor 21.

  Furthermore, by installing the main body exhaust port 9 on the front side of the washing / drying machine main body 1, air containing moisture does not directly hit the surrounding walls or floor, and there is an effect of suppressing generation of mold or the like. In the present embodiment, the exhaust port 9 is provided in the front portion of the main body 1. However, the washing / drying machine may be provided in the lower part because a washing machine pan is installed at the installation location. In this case, since moisture-containing air is blown onto the pan for the washing machine, generation of mold and the like can be suppressed, and there is an effect of suppressing the turbulence of the indoor air flow due to the air flow from the front.

  In the present embodiment, the water tank air supply duct 11 is installed around the rotary drum motor 4 along the motor 4 from below and is connected to the air supply port at the bottom of the water tank. For example, even when a large amount of water accumulates in the water tank during the washing operation, the water does not flow back into the water tank air supply duct 11 and flow into the condenser portion. Accordingly, the supply / exhaust can be installed symmetrically with respect to the rotating drum 3, the supply side can be installed at a low position of the rotating drum 3, and the exhaust side can be installed at a high position. Has the effect of flowing in, and the drying time is shortened.

  As the drying process proceeds, the clothes in the rotating drum 3 spread throughout the entire rotating drum 3, and the flow rate of air passing through the air path decreases. At this time, the condensation temperature of the heat pump rises and tends to exceed the operating range of the compressor 21. In this case, in the present embodiment, when the temperature detected by the condensing temperature detecting means 27 installed in the condenser 22 becomes larger than a preset value, control is performed so as to reduce the rotational speed of the compressor 21. Has been. On the other hand, when the condensation temperature becomes lower than the preset temperature, the rotation speed of the compressor 21 is controlled to be increased. In this way, a stable and stable drying operation in which the rotational speed of the compressor 21 is controlled by the condensation temperature can be realized.

  In the present embodiment, the compressor 21 has been described as a reciprocating type, but is not limited to this, and other types such as a rotary type and a scroll type may be used. Further, the motor built in the compressor 21 is not limited to the inverter type, and the same type of effect can be obtained even if the motor is driven at a constant rotational speed.

  In the present embodiment, the refrigerant is described using R600a (isobutane). However, the present invention is not limited to this, and HFC-based refrigerants such as R134a or mixed refrigerants thereof, flammable refrigerants other than isobutane, natural carbon dioxide, Even if a refrigerant is used, the same effect can be obtained. In particular, carbon dioxide is an advantageous refrigerant for the drying process because the high pressure side is operated in a critical state.

  Further, in the present embodiment, the example in which the air supply port is provided at the rear of the water tank and the exhaust port is provided at the front has been described. However, the present invention is not limited thereto, and the air is supplied from the front of the water tank and exhausted from the rear. However, the same effect can be obtained.

It is a front perspective perspective view of the washing and drying machine concerning this embodiment. It is a back perspective perspective view of the washing and drying machine concerning this embodiment. It is lower part sectional drawing of the washing / drying machine which concerns on this Embodiment. It is a heat pump Ph diagram of the washing and drying machine concerning this embodiment. It is a figure which shows the outline of the air flow of the washing-drying machine which concerns on this Embodiment. It is side surface sectional drawing of the conventional clothes dryer. It is a figure which shows the outline of the air flow of the conventional clothes dryer. It is a block diagram of the conventional clothes dryer.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Washing-dryer main body, 2 ... Water tank, 3 ... Rotating drum, 4 ... Drum motor, 5 ... Opening / closing door, 6 ... Suspension, 7 ... Frame, 8 ... Main body air inlet, 9 ... Main body exhaust port, 10 ... Water tank inlet, 11 ... Water tank air duct, 12 ... Water tank exhaust port, 13 ... Water tank exhaust duct, 14 ... Room temperature detecting means, 15 ... Control board, 21 ... Compressor, 22 ... Condenser, 23 ... Blower for condenser 24 ... capillary tube 25 ... evaporator 26 ... evaporator blower 27 ... condenser temperature detection means 28 ... evaporator temperature detection means 29 ... open / close valve 30 ... drain plate 31 ... condenser filter 32 ... Filter for evaporator, 40 ... Air circulation air passage.

Claims (11)

A heat pump comprising a compressor, a condenser, a throttle means, and a heat pump connected by a pipe line so that the refrigerant circulates, and an air path is formed so that air flows in the order of the condenser, the drying chamber, and the evaporator; A clothes dryer using a combustible refrigerant as the refrigerant. The clothes dryer according to claim 1, wherein R600a is used as a refrigerant of the heat pump. 2. The clothes dryer according to claim 1, wherein a compressor that holds the inside at a compressor suction pressure of a refrigerant is used as the compressor of the heat pump. It is equipped with a compressor, condenser, throttling means, and a heat pump connected by a pipe line so that the refrigerant circulates in the evaporator, and the air supply port provided in the main body, inside the main body, condenser, drying chamber, evaporator, main body An air dryer is configured so that air flows in the order of the provided exhaust ports, and a compressor is disposed inside the main body in the vicinity of the air supply port. The clothes dryer according to claim 4, wherein the air supply port is provided on a back surface of the main body. The clothes dryer according to claim 4, wherein the exhaust port is provided on a front surface of the main body. The clothes dryer according to claim 4, wherein the exhaust port is provided on a bottom surface of the main body. 5. The garment according to claim 4, wherein in the heat pump, a pipe connecting the discharge part of the compressor and the evaporator inlet is provided, and an open / close valve is provided on the compressor side from the center of the pipe. Dryer. 5. The heat pump according to claim 4, wherein the condenser and the evaporator are arranged substantially in parallel, the condenser outlet part and the evaporator outlet part are aligned in the same direction, and the throttle means is provided on the outlet part side. The clothes dryer described. A room temperature detecting means, a condenser temperature detecting means and an evaporator temperature detecting means; the room temperature detecting means detects the room temperature to determine the rotational speed at the start of the compressor; and the condenser temperature detecting means operates the compressor. The compressor temperature is controlled by detecting the condenser temperature in the compressor, and the evaporator temperature detecting means detects the evaporation temperature and performs the defrosting operation. Item 10. A clothes dryer according to item 9. 11. The clothes dryer according to claim 4, wherein a drying load amount in the drying chamber is detected from a torque of a motor that rotates the drying chamber, and the rotation speed of the drying chamber is controlled.

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