JP2014079390A - Clothes dryer - Google Patents

Abstract

A conduit for circulating a refrigerant in a heat pump device is simplified and configured compactly.
A drying chamber for storing clothing, a circulation air passage for circulating drying air discharged from the drying chamber to the drying chamber, a blower for blowing air to the circulation air passage, and a compressor. 1, a condenser 2, a throttle means 3, and an evaporator 4. A heat pump device 6 connected by a refrigerant pipe 5 so that the refrigerant circulates, and a refrigerant pipe 5 protruding from the end of the condenser 2 are accommodated in the cooling water. A water receiving part 12 for cooling and a control means 20 for controlling the drying operation are provided, and the introduction part of the refrigerant pipe 5 from the compressor 1 to the condenser 2 is arranged in the water receiving part 12 for cooling. As a result, the refrigerant pipe through which the refrigerant circulates can be simplified, the heat pump device can be miniaturized, and a compact clothes dryer can be realized.
[Selection] Figure 1

Description

  The present invention relates to a clothes dryer for drying clothes and the like.

  Conventionally, this kind of clothes dryer is considered using the heat pump device (for example, refer to patent documents 1).

  FIG. 6 shows a conventional clothes dryer described in Patent Document 1. In FIG. As shown in FIG. 6, it has the heat pump apparatus 57 connected with the pipe | tube 56 so that a refrigerant | coolant may circulate through the compressor 51, the condenser 52, the heat exhaustor 53, the expansion means 54, and the evaporator 55. As shown in FIG. A wind circuit 58 for flowing the drying air, a condenser 52 for heating the drying air, a blower 59 for blowing the drying air, a drying cabinet 60 containing a drying object such as clothing, and cooling the drying air The evaporator 55 is connected to the dehumidifier 55. The heat exhauster 53 is disposed in a pipe line 56 between the condenser 52 and the throttle means 54, and includes a water supply valve 61 and a water tank 62.

  By supplying water from the water supply valve 61 to the water tank 62, heat is exchanged between the refrigerant in the pipe 56 disposed in the water tank 62 and the water in the water tank 62, and the water in the water tank 62 is drained. It is discharged from the pipe 63 to the drain port 64, and part of the heat of the refrigerant is exhausted to the outside. Further, the temperature of the refrigerant discharged from the compressor 51 is detected by the thermistor 65 attached to the pipe 56 near the refrigerant discharge of the compressor 51, and the operation of the compressor 51 and the water supply valve 61 is controlled by the control means 66. doing. The drying air is flowing in the direction indicated by arrow A.

  The operation of the clothes dryer configured as described above will be described. First, when drying is started, the compressor 51 and the blower 59 operate. Drying air passes through the condenser 52 by the blower 59, is heated by heat radiation from the condenser 52, becomes warm air, and is sent to the drying cabinet 60. The drying air that has come into contact with the clothes in the drying cabinet 60 removes moisture from the clothes and advances the drying of the clothes.

  The drying air is given a sensible heat as the amount of heat for evaporation, and thus the temperature is lowered. The enthalpy of the drying air before and after coming into contact with clothing is almost constant. The drying air having become highly humid is cooled in the evaporator 55, deprived of latent heat and dewed to be dehumidified. The drying air that has been dehumidified and whose absolute humidity has been reduced is heated again by the condenser 52 and circulates in the wind circuit 58.

  On the other hand, in the heat pump device 57, the high-temperature and high-pressure gas refrigerant compressed by the compressor 51 takes heat from the drying air by the condenser 52, condenses and liquefies. Next, the refrigerant exiting the condenser 52 enters the heat exhauster 53 and exchanges heat with water stored in the water tank 62. The water in the heat-exchanged water tank 62 is discharged from the drain pipe 63 to the drain port 64, and a part of the heat of the refrigerant is exhausted to the outside.

  Next, the high-pressure refrigerant is depressurized by the throttle means 54 to become a low temperature and low pressure, and the evaporator 55 takes heat from the drying air and returns to the compressor 51 again. The amount of heat obtained by adding the amount of heat obtained from the input of the compressor 51 to the amount of heat deprived by the evaporator 55 by the refrigerant is radiated from the condenser 52, but the amount of heat corresponding to the input of the compressor 51 is preliminarily reduced by the heat exhaustor 53. In order to discharge to the outside, the amount of heat exhausted from the condenser 52 is balanced at a constant value. The refrigerant is flowing in the direction indicated by arrow B.

JP 2004-239549 A

  However, in the conventional configuration, piping from the condenser 52 to the heat exhaustor 53 and piping from the heat exhauster 53 to the throttle means 54 are necessary, and it is difficult to configure the heat pump device compactly. There was a problem that the clothes dryer to be installed was enlarged.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and aims to provide a compact clothes dryer that simplifies the conduit through which the refrigerant circulates and realizes downsizing of a heat pump device that can exhaust heat. .

  In order to solve the conventional problems, a clothes dryer of the present invention includes a drying chamber for storing clothes, a circulation air passage for circulating drying air discharged from the drying chamber to the drying chamber, A blower that blows air to the circulation air path, a heat pump device that is connected by a refrigerant pipe so that the refrigerant circulates through the compressor, the condenser, the throttle means, and the evaporator; and the refrigerant pipe that protrudes from the end of the condenser. A water receiving part for containing and cooling with cooling water; and a control means for controlling the drying operation, wherein the introduction part of the refrigerant pipe from the compressor to the condenser is disposed in the water receiving part for cooling. It is a thing.

  Thereby, while being able to utilize a part of condenser as a heat exhaust part, the refrigerant | coolant pipe | tube through which a refrigerant | coolant circulates can be simplified, and a heat pump apparatus can be comprised compactly.

  The clothes dryer of the present invention can simplify the refrigerant pipe through which the refrigerant circulates, and can downsize the heat pump device capable of exhausting heat to realize a compact clothes dryer.

System diagram of clothes dryer in Embodiment 1 of the present invention Main part configuration diagram of heat pump device of the clothes dryer Cross section of the main part of the heat pump device of the clothes dryer Block diagram of the clothes dryer Time chart showing cooling water supply operation of heat pump device of the clothes dryer System diagram of conventional clothes dryer

  A first invention includes a drying chamber for storing clothes, a circulation air passage for circulating the drying air discharged from the drying chamber to the drying chamber, a blower for blowing air to the circulation air passage, and a compressor. A heat pump device connected by a refrigerant pipe so that the refrigerant circulates through the condenser, the throttle means, and the evaporator; a water receiving part that houses the refrigerant pipe protruding from the end of the condenser and cools it with cooling water; A control means for controlling the drying operation, and the introduction of the refrigerant pipe from the compressor to the condenser is arranged in the water receiving part for cooling, thereby introducing a high temperature of the refrigerant pipe. It is possible to effectively exhaust heat by cooling the part, so that a part of the condenser can be used as the exhaust heat part, the refrigerant pipe through which the refrigerant circulates is simplified, and the heat pump device is configured compactly be able to.

  According to a second aspect of the invention, in particular, in the first aspect of the invention, the refrigerant pipe introduction part to the condenser is arranged at the lower part of the condenser and positioned below the water receiving part. Thus, a small amount of water can be stored in the water receiving portion to cool the introduction portion.

  In the third invention, in particular, the water receiving portion of the first or second invention is provided with an inflow valve for supplying cooling water and an outflow valve for discharging the cooling water, so that a small amount is provided in the water receiving portion. Water can be stored and the introduction part can be cooled, and the amount of exhaust heat can be adjusted by varying the time of immersion in the water supplied into the water receiving part.

  According to a fourth aspect of the present invention, in particular, the water receiver of any one of the first to third aspects includes an end plate provided at an end of the condenser and connected to the evaporator, and a refrigerant pipe protruding from the end plate. By having the cover provided so as to cover, the water receiving portion can be downsized and the configuration can be simplified.

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

(Embodiment 1)
FIG. 1 is a system diagram of a clothes dryer according to the first embodiment of the present invention, FIG. 2 is a main part configuration diagram of the heat pump device of the clothes dryer, and FIG. 3 is a diagram of the heat pump device of the clothes dryer. FIG. 4 is a block diagram of the clothes dryer, and FIG. 5 is a time chart showing the cooling water supply operation of the heat pump device of the clothes dryer.

  1 to 5, a clothes dryer includes a compressor 1 that compresses a refrigerant, a condenser 2 that dissipates heat of the compressed high-temperature and high-pressure refrigerant, and a capillary tube that reduces the pressure of the high-pressure refrigerant. And a heat pump device 6 connected in order by a refrigerant pipe 5 so that the refrigerant circulates in the compressor 1 again. Is provided.

  The condenser 2 includes a heating unit 7 that heats drying air, and an exhaust heat unit 8 that exhausts heat of the refrigerant. The heating unit 7, a blower 9 that blows drying air, and clothes A circulation air passage 11 is provided in which a drying chamber 10 for storing an object to be dried such as an evaporator 4 and an evaporator 4 that absorbs heat from drying air are connected in an annular shape. The exhaust heat unit 8 is provided outside the circulation air passage 11.

  The arrow C indicates the direction in which the drying air flows through the circulation air passage 11, and the arrow D indicates the direction in which the refrigerant flows through the refrigerant pipe 5.

  The exhaust heat unit 8 is connected to a water receiving unit 12 that stores cooling water and a water supply 13, and serves as a cooling water supply unit that supplies and stops the cooling water to the water receiving unit 12. An outflow valve 15 is provided as a cooling water draining means for discharging and stopping the cooling water inside.

  The water receiver 12 is provided with an end plate 16 at one end of the condenser 2, and a cover 17 is attached so that the refrigerant pipe 5 protruding from the end plate 16 is covered. In addition, the introduction part 18 of the refrigerant pipe 5 from the compressor 1 to the condenser 2 is provided at the lower part of the condenser 2 and at the lower part in the water receiving part 12.

  The water receiving part 12 stores a predetermined amount of cooling water by opening and closing an inflow valve 14 for supplying cooling water from the water supply 13 into the water receiving part 12 and an outflow valve 15 for draining the water in the water receiving part 12. The refrigerant pipe 5 protruding from the end plate 16 can be cooled.

  Here, since the introduction part 18 of the refrigerant pipe 5 from the compressor 1 to the condenser 2 is arranged in the water receiving part 12, the refrigerant pipe 5 through which the high-temperature refrigerant discharged from the compressor 1 passes. Can be cooled by the cooling water, so that the heat can be effectively exhausted.

  In addition, since the introduction portion 18 of the refrigerant pipe 5 to the condenser 2 is arranged at the lower portion of the condenser 2 and is positioned below the water receiving portion 12, Without introducing a large amount of water, the introduction portion 18 of the refrigerant pipe 5 discharged from the compressor 1 and heated to a high temperature can be cooled with a small amount of water, so that water can be saved.

  In addition, since the exhaust heat unit 8 is provided with the inflow valve 14 on the inflow side of the water receiving unit 12 and the outflow valve 15 on the outflow side so that the cooling water can be stored and drained, the water receiving unit 12 is provided. It is possible to cool the introduction part 18 by accumulating water.

  Further, by adjusting the amount of water stored in the water receiving portion 12 and the water immersion time of the introduction portion 18, the amount of exhaust heat can be adjusted and cooling can be performed efficiently.

  Further, at least one end of the condenser 2 is provided with an end plate 16 connected to the evaporator 4, and a cover 17 is attached to the end plate 16 so as to cover the refrigerant pipe 5 protruding from the end plate 16, and a water receiving portion. By configuring 12, the heat pump device 6 in which the exhaust heat unit 8 is downsized can be simplified, and a compact clothes dryer can be realized.

  In the water receiving part 12, a refrigerant temperature detection means 19 for detecting the temperature of the refrigerant is provided in the introduction part 18 of the refrigerant pipe 5 from the compressor 1 to the condenser 2 in order to detect the state of the heat pump device 6. ing.

  The refrigerant temperature detection means 19 can detect the temperature of the introduction section 18 at which the temperature of the refrigerant becomes high, and can detect the amount of exhaust heat when the cooling water is supplied. Therefore, it is possible to control an appropriate amount of exhaust heat by detecting the amount of exhaust heat, so that efficient cooling is possible and the state of the heat pump device 6 can be changed. Efficient drying can be performed while maintaining a stable state.

  Furthermore, since the refrigerant temperature detection means 19 is configured to be positioned below the water receiving portion 12, even when a small amount of water is put into the water receiving portion 12, the amount of exhaust heat is detected accurately. Therefore, it is possible to cool efficiently.

  The control means 20 controls the drying operation and opens and closes the inflow valve 14 and the outflow valve 15 according to the output from the refrigerant temperature detection means 19 to control the supply and drainage of the cooling water to the water receiving portion 12. It is configured to

  About the clothes dryer comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, when the drying operation is started, the blower 9 and the compressor 1 are operated. The drying air blown to the circulation air passage 11 by the blower 9 is heated by passing through the heating unit 7 of the condenser 2 and is sent to the drying chamber 10 as warm air. The drying air that has come into contact with the clothes in the drying chamber 10 removes moisture from the clothes and dries the clothes.

  The drying of the clothes is detected by the drying detection means 21. The drying detection unit 21 includes a first temperature detection unit 21a that detects the temperature of the drying air that flows into the drying chamber 10, and a second temperature detection unit 21b that detects the temperature of the drying air that has flowed out of the drying chamber 10. Each of them is provided in the circulation air passage 11 near the drying chamber 10, and the drying operation is continued until a predetermined dryness is detected from these outputs.

The drying air is given a sensible heat as an amount of heat for evaporation, and thus the temperature is lowered. However, the drying air contains water vapor having substantially the same latent heat released from the clothing and becomes high-humidity air. The enthalpy of the drying air before and after coming into contact with clothing is almost constant. The drying air that has become highly humid is cooled in the evaporator 4, deprived of latent heat, dewed and dehumidified, and the drying air that has been dehumidified and has reduced absolute humidity is heated again by the heating unit 7.

  On the other hand, in the heat pump device 6, the heat of the high-temperature and high-pressure refrigerant compressed by the compressor 1 heats and condenses the drying air in the heating unit 7, and in the exhaust heat unit 8, the water receiving unit 12 from the inflow valve 14. A part of heat is released by heat exchange between the cooling water supplied to the refrigerant and the refrigerant.

  Next, the high-pressure refrigerant is depressurized by the throttle means 3 to become a low temperature and low pressure, takes heat from the drying air by the evaporator 4, and returns to the compressor 1 again. The amount of heat obtained by adding the amount of heat obtained from the input of the compressor 1 to the amount of heat taken by the evaporator 4 by the refrigerant is radiated from the condenser 2, but the amount of heat corresponding to the input of the compressor 1 is discharged from the exhaust heat unit 8. Since it is heated and discharged to the outside in advance, the heating amount from the heating unit 7 is balanced at a constant value.

  As a result, the refrigerant temperature and pressure can be prevented from excessively rising and the compressor 1 can be prevented from being overloaded. Therefore, a safe and stable heat pump cycle can be realized, and the clothes dryer is compact and has a high energy-saving effect. Can be realized.

  Here, a method for controlling the exhaust heat unit 8 will be described. FIG. 5 is a time chart showing the cooling water supply operation in the exhaust heat unit 8. In FIG. 5, the horizontal axis represents the time from the start of the drying operation, the vertical axis represents the rotation speed of the compressor 1, the refrigerant temperature detected by the refrigerant temperature detection means 19, and the opening / closing operations of the inflow valve 14 and the outflow valve 15. .

  First, when the blower 9 is operated and the drying operation is started (T0), the compressor 1 is operated at a predetermined rotational speed R, and the inflow valve 14 and the outflow valve 15 are closed, whereby cooling water is placed in the water receiving portion 12. In a state where there is no exhaust, the amount of exhaust heat from the exhaust heat unit 8 is minimized.

  As the drying operation proceeds, the temperature of the drying air rises, the temperature of the refrigerant detected by the refrigerant temperature detection means 19 rises, and the refrigerant temperature reaches the predetermined temperature K1 by the output from the refrigerant temperature detection means 19. If it is detected, the inflow valve 14 and the outflow valve 15 are operated so as to stabilize the temperature of the refrigerant.

  That is, by opening the inflow valve 14 and closing the outflow valve 15 (T1), control is performed so that the coolant supplied in the water receiving portion 12 is accumulated, and based on the output from the refrigerant temperature detecting means 19. Thus, the inflow valve 14 and the outflow valve 15 are opened and closed.

  Thereby, the amount of exhaust heat from the exhaust heat unit 8 is increased or decreased so that the output value from the refrigerant temperature detection means 19 is stabilized at a predetermined value. At this time, the amount of exhaust heat may be increased or decreased by increasing or decreasing the amount of water supplied, or the amount of exhaust heat may be adjusted by increasing or decreasing the time during which the refrigerant pipe 5 is immersed in the cooling water.

  In this way, by controlling the amount of exhaust heat in accordance with the temperature information from the refrigerant temperature detecting means 19, it is possible to suppress an excessive increase in the refrigerant temperature and to stabilize the refrigerant temperature. In addition to preventing, a stable and efficient drying operation can be performed, and a drying operation with a high energy saving effect can be realized.

Here, when the refrigerant temperature falls below the predetermined temperature K2 for some reason, the cooling water in the water receiving portion 12 is drained by closing the inflow valve 14 and opening the outflow valve 15 (T2). When the refrigerant temperature reaches a predetermined temperature K1, the rise of the inflow valve 14 and the outflow valve 15 are closed again (T3) to supply the cooling water and stabilize the refrigerant temperature.
Control is performed in the same manner as T1 to T2.

  As described above, when the refrigerant temperature reaches the predetermined temperature K1, water is supplied to the water receiving portion 12 to collect water and exhaust heat, so that the refrigerant temperature reaches the predetermined temperature in the initial stage after the drying operation is started. When K1 has not been reached, water is not supplied to the water receiving part 12, so that heat is not radiated more than necessary by the heat exhausting part 8, and efficient clothing drying can be performed.

  In addition, when the amount of heat corresponding to the input of the compressor 1 is larger than the amount of heat radiated from the exhaust heat unit 8, the amount of heat corresponding to the input of the compressor 1 can be reduced by lowering the rotational speed of the compressor 1. In addition, it is possible to balance the amount of heat radiated from the exhaust heat unit 8, and it is possible to prevent the refrigerant temperature from rising excessively and to realize efficient drying.

  By the operation as described above, the amount of exhaust heat from the exhaust heat unit 8 is minimized so that the temperature rises faster in the middle of the rise of the drying air and the refrigerant temperature in the initial stage of the drying operation. Therefore, heat loss is reduced, and drying can be performed with more energy saving. Moreover, when drying progresses and the refrigerant temperature rises, drying can be performed efficiently by supplying cooling water, cooling the refrigerant, and exhausting heat.

  As described above, the introduction portion 18 of the refrigerant pipe 5 from the compressor 1 to the condenser 2 is disposed in the water receiving portion 12 for cooling, and there is no need to provide a separate heat exhauster. The refrigerant pipe 5 can cool the introduction part 18 having a high temperature to effectively exhaust heat, and a part of the condenser 2 can be used as the exhaust heat part 8, so that the refrigerant circulates in the refrigerant pipe. 5 can be simplified and the heat pump device 6 can be configured compactly.

  In addition, the drum which comprises the drying chamber 10 is provided in a water tank, the water supply apparatus which supplies washing water in a water tank, and the drainage device which drains the washing water in a water tank are provided, and the washing drying which has a washing function and a drying function It can be implemented as a machine, and the same effect can be obtained.

  Moreover, the drying chamber 10 may be configured to be dried in a state where a drying target such as clothes is suspended, in addition to the drum configured to be rotatable.

  As described above, the clothes dryer according to the present invention can simplify the refrigerant pipe through which the refrigerant circulates, and can reduce the size of the heat pump device. It can be applied to other uses.

DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Throttling means 4 Evaporator 5 Refrigerant pipe 6 Heat pump apparatus 9 Blower 10 Drying chamber 11 Circulating air path 12 Water receiving part 14 Inflow valve 15 Outflow valve 18 Introduction part 20 Control means

Claims (4)

A drying chamber for storing clothes, a circulation air passage for circulating the drying air discharged from the drying chamber to the drying chamber, a blower for blowing air to the circulation air passage, a compressor, a condenser, and a throttle means; A heat pump device connected to the evaporator by a refrigerant pipe so that the refrigerant circulates, a water receiving part for receiving the refrigerant pipe protruding from the end of the condenser and cooling with cooling water, and a control for controlling the drying operation And a cooling unit provided with an introduction portion of a refrigerant pipe from the compressor to the condenser in the water receiving portion. The clothes dryer according to claim 1, wherein an introduction portion of the refrigerant pipe to the condenser is disposed at a lower portion of the condenser and is positioned below the water receiving portion. In the water receiver,
The clothes dryer of Claim 1 or 2 provided with the inflow valve which supplies cooling water, and the outflow valve which drains cooling water. The said water receptacle part has an end plate provided in the edge part of the condenser and connected with the evaporator, and a cover provided so that the refrigerant | coolant pipe | tube protruded from the said end plate might be covered. The clothes dryer as described in.