JP2008253394A - Drum type washing/drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing/drying machine capable of effectively drying the laundry without discharging humid air to the outside or without changing conditions for operating a heat pump. <P>SOLUTION: The drum type washing/drying machine 1 includes an outer tub 20 whose interior is a drying chamber inside when the laundry is dried; a rotary drum 30 rotatably disposed inside the outer tub 20 to store the laundry W; and the heat pump 60 which has a compressor 61 for compressing a refrigerant, a radiator 62 for radiating the heat of the compressed refrigerant, a pressure regulator 63 for reducing the pressure of the refrigerant and a heat sink 64 for absorbing heat from the periphery with the decompressed refrigerant, and which is configured so that the refrigerant circulates while repeating compression and expansion. In the drum type washing/drying machine 1, air circulates from the radiator 62, the outer tub 20, the heat sink 64 and to the radiator 62 in this order when the laundry is dried. The drum type washing/drying machine 1 also has cooling piping C through which cooling water flows to cool the refrigerant flowing in the radiator 62. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drum type washing and drying machine provided with a heat pump.

  A heat pump with high thermal efficiency has attracted attention as a drying device for a drum-type washing and drying machine (see Patent Document 1). In a drum-type washing / drying machine equipped with a heat pump, the heat is radiated to the air by radiating the heat of the refrigerant to the air in the heat pump radiator, and the laundry is dried by supplying the warmed air to the laundry. Is done. And in the heat absorber of the heat pump, the heat of the air containing the moisture of the laundry and becoming hot and humid is absorbed by the refrigerant, thereby cooling the air and condensing the moisture in the air to dehumidify the air.

Next, the dehumidified air is heated again by a heat pump radiator and then supplied to the laundry. That is, in the drum type washing and drying machine, air flows and circulates in the order of the radiator, the laundry, the heat absorber, and so on.
JP 2005-318917 A

  However, in a drum-type washing / drying machine equipped with a heat pump, when the laundry is dried continuously, the temperature of the circulating air increases and the temperature of the refrigerant circulating in the heat pump also increases, and the compressor that pumps the refrigerant is used. There is a risk of reaching the allowable temperature. Therefore, (1) reducing the drying performance of the heat pump, specifically, reducing the operating conditions of the compressor (rotational speed of the compressor) and suppressing the degree of air heating by the radiator, or (2) high temperature A method of discharging a part of the circulating air to the outside can be considered.

  However, if the operating condition of the compressor is lowered, the control becomes complicated, and if a part of the circulating air is discharged to the outside, the humidity of the washing machine place may be increased.

  Accordingly, an object of the present invention is to provide a drum type laundry dryer that can suitably dry laundry without discharging humid air to the outside and without changing the operating conditions of the heat pump.

  As means for solving the above-mentioned problems, the present invention provides an outer tub whose inside becomes a drying chamber at the time of drying, a rotating drum that is rotatably arranged in the outer tub, and stores laundry, and compresses a refrigerant. A compressor, a radiator that dissipates heat of the compressed refrigerant, a decompression unit that decompresses the pressure of the refrigerant, and a heat absorber that absorbs heat from the surroundings of the decompressed refrigerant, and the refrigerant repeatedly compresses and expands And a heat pump configured to circulate, and when drying, a drum-type washing and drying machine in which air circulates in the order of the radiator, the outer tub, the heat absorber, and the radiator, A drum-type washing and drying machine comprising a cooling pipe through which cooling water flows so as to cool a refrigerant flowing through a radiator.

  According to such a drum type washing / drying machine, the high-temperature refrigerant flowing through the radiator is cooled by the cooling water flowing through the cooling pipe. Thereby, in the radiator, the amount of heat that the refrigerant dissipates to the outside decreases. Along with this, the temperature of the refrigerant flowing toward the decompression means decreases, the temperature of the refrigerant after decompression and expansion decreases, and the amount of heat that can be absorbed by the refrigerant increases. Therefore, the refrigerant whose temperature has decreased absorbs a large amount of heat from the air flowing outside the heat absorber in the heat absorber, and as a result, the temperature rise of the circulating air is prevented. Therefore, the refrigerant temperature is prevented from reaching the allowable temperature of the compressor, and there is no need to change operating conditions such as reducing the rotational speed of the compressor. Further, since hot and humid air is not discharged to the outside, the humidity of the washing machine place does not increase.

  According to the present invention, it is possible to provide a drum-type laundry dryer that can suitably dry laundry without discharging humid air to the outside and without changing the operating conditions of the heat pump.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings as appropriate.

≪Drum type washer / dryer configuration≫
First, the mechanical configuration of the drum-type washing / drying machine 1 according to the present embodiment will be described with reference to FIGS. 1 to 3.
As shown in FIGS. 1 and 2, the drum type washing and drying machine 1 includes a housing 10, an outer tub 20, a rotating drum 30, air circulating means for circulating air during drying, and heating and circulating air. The heat pump 60 (refer FIG. 3) to cool is provided. The rotation axis A of the rotary drum 30 is disposed obliquely (see FIG. 2). Here, for the sake of clarity, front / rear / up / down / left / right are set as shown in FIG.

<Case>
As shown in FIG. 1, the housing 10 is an outer frame housing of the drum type washing and drying machine 1, and is provided on a housing base 11 having rubber legs 11 a at four corners in order to attenuate vibration during operation. Is arranged. However, a configuration without the housing base 11 may be used.
The housing 10 is made of a resin that forms a frame formed by assembling a metal front panel, left panel, right panel, rear panel, and the like, and covers the frame to form an exterior design surface of the drum type washing and drying machine 1. It is configured with a design panel and the like.

  An entrance 10a for the laundry W is formed on the front side of the housing 10 (see FIG. 2). The insertion port 10a is appropriately opened and closed by a door 12 rotatably attached to the housing 10 via a hinge (not shown). The door 12 is configured to be locked by a lock mechanism (not shown) in the closed position, and the lock is released when a lock release button 13 disposed on the upper right front surface of the housing 10 is pressed. It has become so. Further, an annular bellows 12a is provided at the edge of the insertion port 10a so that the door 12 is in close contact with the bellows 12a when the door 12 is closed.

  Further, a latching hole 10b is formed on the right side surface of the housing 10 to latch a drainage hose 23a described later. Furthermore, a handle 14 for carrying the drum type washing / drying machine 1 is provided at appropriate positions on the left side surface and the right side surface of the housing 10.

In addition, a detergent case 15, a filter case 16, a filter case 17, an operation unit 18, and a display unit 19 are arranged on the front surface of the housing 10 so as to be freely drawn out.
The detergent case 15 is a case in which a detergent used for washing is put. The filter case 16 is loaded with a filter that collects lint and the like accompanying the circulating water by operating the circulation pump 24 (see FIG. 4) during washing and rinsing. The filter case 17 is loaded with a filter 17a (see FIG. 3) that collects lint and the like that accompanies air that circulates during drying.
The operation unit 18 is a part that the driver operates to select a washing mode or the like, and the display unit 19 is a part that displays the selected washing mode or the like.

<Outer tank>
The outer tub 20 is a low-cylindrical body for storing washing water or rinsing water, and the inside of the outer tub 20 becomes a drying chamber during drying. Such an outer tub 20 is disposed in the housing 10 while being supported from below by a suspension 21. Moreover, the axis of the outer tub 20 is slanted, the rear side is in a lowered state, and the front side is open. Regarding the degree of inclination of the rotation axis A of the outer tub 20 and the rotary drum 30 coaxial with the outer tub 20, the angle θ1 formed by the rotation axis A and the horizontal plane is 5 to 30 ° in consideration of taking out the laundry W or the like. Preferably, 15 ° is optimal.

Further, an ejection hole 20a through which air is ejected at the time of drying is formed on the upper side of the bottom wall of the outer tank 20, and a discharge hole through which air is exhausted at the time of drying is formed on the front side of the upper peripheral wall of the outer tank 20. 20b is formed. The ejection hole 20a and the discharge hole 20b are disposed above the central axis of the outer tub 20, and are designed so that washing water or the like does not enter the ejection hole 20a or the like during washing or rinsing. . Further, a shutter that is opened at the time of washing and rinsing may be provided in the ejection hole 20a and the like.
However, the air ejection position and the ejection position during drying are not limited to this, and can be changed as appropriate. For example, a configuration in which air is introduced from the front side of the outer tub 20 and discharged from the rear side may be employed.

  The suspension 21 is, for example, a damping device that includes a cylinder and a compression coil spring (see FIG. 2). The suspensions 21 are arranged in a plurality (for example, three) in the circumferential direction of the outer tub 20 and support the approximate center of gravity of the outer tub 20.

  The upper part of the outer tub 20 is connected to the housing 10 via a tension spring 22A and a tension spring 22B (tensile coil spring). Accordingly, the outer tank 20 is prevented from falling, and the vertical and horizontal vibrations of the outer tank 20 during dehydration are reduced while the posture of the outer tank 20 is maintained. The lower part of the outer tub 20 is connected to a drainage hose 23a via a drainage valve 23 that is opened at the end of washing and rinsing, dehydration and drying.

<Rotating drum>
The rotating drum 30 is a bottomed cylindrical body made of stainless steel, for example, and is a tub that accommodates the laundry W. The rotating drum 30 is coaxial with the outer tub 20 and is rotatably disposed in the outer tub 20. The side is open. A motor 31 (for example, a DC / DC brushless motor) is attached to the outside of the bottom wall of the outer tub 20 via a bracket (not shown), and the output shaft 31a of the motor 31 is the bottom of the outer tub 20. It extends into the outer tub 20 through the output shaft hole of the wall. The bottom wall of the rotary drum 30 is fixed to the output shaft 31a via a flange and a disk-shaped reinforcing plate (not shown) that reinforces the bottom wall. In other words, the rotating drum 30 is supported by the motor 31 in a cantilevered manner.

  A plurality of dewatering holes 30 a are formed in the peripheral wall of the rotating drum 30. When the rotating drum 30 is rotated by the motor 31 at the time of dehydration, the moisture of the laundry W is dehydrated to the outer tub 20 through the dehydration hole 30a by centrifugal force. The bottom wall of the rotary drum 30 is formed with a plurality of vent holes 30b through which air passes during drying.

  Further, a plurality of lifters 32 are provided on the inner peripheral surface of the rotating drum 30 at equal intervals in the circumferential direction (for example, in the case of three, 120 ° intervals). Accordingly, the laundry W on the back side (bottom side) of the rotary drum 30 is also efficiently scraped.

  Furthermore, a ring-shaped fluid balancer 33 is provided at the edge of the front opening of the rotary drum 30. The fluid balancer 33 maintains the balance of the rotating drum 30 that rotates during dehydration and reduces vibration. Such a fluid balancer 33 has a ring-shaped space inside, and a fluid having a high specific gravity such as an aqueous potassium chloride solution is accommodated in this space.

<Piping status of tap water and bath water>
Next, with reference to FIG. 3, a piping situation in which tap water and bath water supplied to and discharged from the outer tub 20 will be described.

  A pipe 40a (water supply hose) whose upstream end is connected to the tap water tap 40 is branched into three branches on the downstream side, and is connected to the solenoid valve 41, the solenoid valve 42, and the solenoid valve 43, respectively. ing. Note that the detergent case 15 such as the electromagnetic valve 41 is disposed on the inner upper portion of the housing 10 (see FIG. 2).

  The electromagnetic valve 41 is connected to the upper part of the outer tub 20 via the piping 41a. When the electromagnetic valve 41 is opened, tap water is supplied into the outer tub 20 as wash water or rinse water. The detergent case 15 is arranged on the pipe 41a, and the detergent put in the inside of the detergent case 15 is supplied into the outer tub 20 together with tap water. Further, the detergent case 15 is provided with a softener case (not shown), and the softener in the softener case is appropriately supplied to the outer tub 20.

  The electromagnetic valve 42 is connected to the vicinity of the vertical lower surface of the outer tub 20 through a pipe 42a. Thereby, in order to supply bath water as cooling water as will be described later, after the electromagnetic valve 45 is opened, the priming water supplied to the pump 44 flows along the vertical lower surface of the outer tub 20 from the pipe 42a, and drains. It flows into the valve 23. As a result, priming water is not applied to the laundry W in the rotary drum 30.

  A part of the pipe 42a constitutes a cooling pipe C. And the piping C for cooling comprises the heat radiator 62 of the heat pump 60, and is arrange | positioned along the refrigerant | coolant piping through which a refrigerant | coolant flows. Further, the cooling pipe C is thermally connected to the fins 62f of the radiator 62 and shares the fins 62f. Therefore, when the electromagnetic valve 42 is opened, tap water is supplied to the cooling pipe C as cooling water. That is, in this embodiment, the pipe 40a, the solenoid valve 42, the pipe 42a, etc. constitute a tap water supply means for supplying tap water as cooling water to the cooling pipe C.

  Further, when the bath water or tap water is supplied to the cooling pipe C as cooling water, the drain valve 23 is set to be opened so that water does not collect in the outer tub 20. In addition, it is good also as a structure which connects the downstream end of the piping 42a to the drainage hose 23a, and closes the drainage valve 23 at the time of drying.

  The electromagnetic valve 43 is connected to the pump 44 through a pipe 43a. When the electromagnetic valve 43 is opened, tap water is supplied to the pump 44 as priming water or the like.

The pump 44 uses, for example, a DC / DC brushless motor as a power source, pumps the bath water of the bath B through the filter 44a and the pipe 44b, supplies it to the outer tub 20 as wash water, and the cooling water as cooling water And a function of supplying to the pipe C.
More specifically, the pump 44 is connected to a pipe 42a constituting the cooling pipe C through a solenoid valve 45 and a pipe 45a on one of the pipes 44c whose downstream side is divided into two. The pump 44 is connected to the outer tub 20 via the other of the two divided pipes 44c, a solenoid valve 46, a pipe 46a, and a pipe 41a.
That is, in the present embodiment, bath water supply means for supplying bath water as cooling water to the cooling pipe C is constituted by the pipe 44b, the pump 44, the pipe 44c, the electromagnetic valve 45, the pipe 45a, the pipe 42a, and the like. .

<Operation settings of solenoid valve and pump>
Next, opening / closing settings of the solenoid valves 41 to 43 and 45 to 46 and operation settings of the pump 44 will be described.
When there is bath water at the time of washing and rinsing (or only at the time of washing), the solenoid valves 43 and 46 are opened, the pump 44 to which the priming water is sent operates, the bath water is pumped up, the solenoid valve 46 and the piping It is supplied to the outer tub 20 through 46a and 41a.

Thereafter, when there is no bath water or when there is no bath water from the beginning, the solenoid valve 41 is opened, the pump 44 is stopped, the solenoid valve 46 is closed, and tap water passes through the solenoid valve 41 and the pipe 41a. It is supplied to the outer tub 20 via.
Thus, the flow rate of the bath water and tap water supplied to the outer tub 20 at the time of washing etc. is set to 10-20 L / min, for example. For example, when the bath water is to be pumped and the output current of the pump 44 is smaller than a predetermined current, it is determined that there is no bath water. In addition, the presence or absence of bath water may be determined by a water level sensor or the like.

  Next, when cooling water is to be supplied to the cooling pipe C at the time of drying, when there is bath water, the electromagnetic valve 43 is opened temporarily with the electromagnetic valve 45 being opened, and the pump 44 is supplied with priming water. Is supplied, bath water is pumped up through the pipe 44b, and bath water is supplied to the cooling pipe C as cooling water through the pipe 44c, the solenoid valve 45, the pipe 45a, and the pipe 42a. It comes to be supplied.

  Thereafter, when there is no bath water or when there is no bath water from the beginning, the electromagnetic valve 42 is opened, the pump 44 is stopped, the electromagnetic valve 45 is closed, and the cooling water is supplied via the electromagnetic valve 42 and the piping 42a. The tap water is supplied to the cooling pipe C.

  Thus, the flow rate of tap water or bath water supplied to the cooling pipe C as cooling water at the time of drying is smaller than the flow rate of tap water or the like supplied to the outer tub 20 at the time of washing, for example, 0.2 It is set to ˜0.5 L / min. The setting of the flow rate of the cooling water at the time of such drying is, for example, a method in which a valve with a small opening is employed as the electromagnetic valve 42 or the rotational speed of the DC / DC brushless motor that is the power source of the pump 44 is controlled. There is a way to do it.

Further, the controller 100 (control means) cools the cooling pipe C based on the temperature of the compressor 61 detected by a temperature sensor 65 (temperature detection means) described later and the temperature of the air discharged from the outer tub 20. A configuration in which the flow rate of water is controlled, that is, a configuration in which the rotation speed of the pump 44 is increased so that the flow rate of the cooling water increases when the detected temperature increases, may be employed.
In addition, it is good also as a structure which provides the flow control valve which can control a flow volume including zero in the position of the solenoid valve 42, and the controller 100 controls a flow rate via a flow control valve. Moreover, it is good also as a structure which makes the controller 100 open the solenoid valve 42 intermittently (intermittently), for example, when the temperature of the compressor 61 becomes high, and shortens closing time.
The temperature at which the supply of cooling water to the cooling pipe C is to be started is set based on the specifications (heat resistance) of the compressor 61 and the like, and is obtained by a preliminary test.

<Air circulation means>
When the laundry W is dried, the air circulation means passes through the drying chamber in the outer tub 20, the heat absorber 64 described later of the heat pump 60, the cooling pipe C provided in parallel therewith, and the radiator 62. And a fan 51 and a filter 17a. When the fan 51 is activated, a flexible hose or the like is used so that air returns to the fan 51 via the ejection hole 20a, the discharge hole 20b, the filter 17a, the heat absorber 64, and the heat radiator 62 of the outer tub 20. The air flow path constituting member 52 and the housing 53 surrounding the heat absorber 64 and the heat radiator 62 constitute an air circulation flow path.

  The filter 17a is a filter that collects lint and the like accompanying the circulating air during drying, and is disposed between the discharge hole 20b of the outer tub 20 and the heat absorber 64 in the present embodiment. Yes. Thereby, the lint etc. accompanying the air discharged from the discharge hole 20b are collected by the filter 17a. As a result, yarn waste or the like is not sent to the heat absorber 64 and the radiator 62, and the fins 64f and 62f of the heat absorber 64 and the radiator 62 are not clogged.

<Heat pump>
The heat pump 60 is a device (heat pump) that circulates the refrigerant while repeatedly compressing and expanding the refrigerant such as carbon dioxide, and warms the air supplied to the outer tub 20 by the refrigerant whose temperature has been increased by being compressed. At the same time, it is a device that cools and dehumidifies the hot and humid air discharged from the outer tub 20 by the refrigerant whose temperature has decreased due to expansion.

  Such a heat pump 60 includes a compressor 61 that compresses the refrigerant, a radiator 62 that radiates the heat of the compressed and heated refrigerant to the air, a pressure regulating valve 63 (decompression unit) that depressurizes the refrigerant, and a decompression unit. A heat absorber 64 that absorbs heat from the air (ambient) to the refrigerant that has become low in temperature and a temperature sensor 65 are provided. The compressor 61 and the like are placed on the bottom surface of the housing 10 (see FIG. 2), whereby the center of gravity of the drum-type washing and drying machine 1 is lowered to prevent vibration.

  The outlet of the compressor 61 is connected to the inlet of the compressor 61 via a pipe 61a, a radiator 62, a pipe 62a, a pressure regulating valve 63, a pipe 63a, a heat absorber 64, and a pipe 64a, and the refrigerant circulation. The route is configured. The radiator 62 and the heat absorber 64 have fins 62f and 64f, respectively, in order to efficiently exchange heat between the refrigerant and the air.

An inlet of the pipe 64b is disposed substantially vertically below the heat absorber 64, and the dew condensation water generated by being cooled by the heat absorber 64 flows into the pipe 64b by its own weight. And the dew condensation water which flowed in is drained to the drainage hose 23a through the pipe 64b. The pipe 64b is provided with a check valve 66 for preventing a backflow of discharged wash water or the like from the drain hose 23a to the heat absorber 64.
In addition, a partition wall or the like may be provided between the heat absorber 64 and the radiator 62 so that the dew condensation water generated by the heat absorber 64 does not flow into the radiator 62 side.

  The temperature sensor 65 is a sensor that detects the temperature of the compressor 61, and is disposed on the outer surface or the inside of the compressor 61. Note that the temperature sensor 65 is preferably built in the compressor 61. When the temperature sensor 65 is built in this way, the temperature detection sensitivity of the temperature sensor 65 is good.

≪Control system for drum type washer and dryer≫
Next, a control system configuration for controlling the operation of the drum type washing and drying machine 1 will be described with reference to FIG.
As shown in FIG. 4, a commercial power supply 80 of AC 100V is connected to a filter circuit 84 that removes line noise and electromagnetic noise in and out of the drum type washer / dryer 1 through an outlet plug 81, a power switch 82 and a fuse 83. Has been. The filter circuit 84 has a three-phase alternating current via a rectifier circuit 85 (AC / DC converter) that rectifies alternating current power from the commercial power supply 80 into direct current power, and an inverter circuit 86 that generates a three-phase alternating current based on the direct current power. The motor 31 is rotated by an electric current and connected to a motor 31 that rotates the rotary drum 30.

  Between the rectifier circuit 85 and the inverter circuit 86, a fuse 87 and a voltage detection circuit 88 for detecting an output voltage of the rectifier circuit 85 (voltage applied to the inverter circuit 86) are provided. A washing amount sensor 89 that detects the amount of the laundry W in the rotary drum 30 based on the output current to the motor 31 is provided in one of the three power supply lines from the inverter circuit 86 to the motor 31. Yes. Further, in the vicinity of the motor 31, a rotation speed sensor 90 configured by an IC Hall element or the like and detecting the rotation speed of the rotary drum 30 is provided.

  The controller 100 described later controls the inverter circuit 86 while detecting signals from the voltage detection circuit 88, the washing amount sensor 89, and the rotation speed sensor 90 to generate a three-phase alternating current, and rotates the motor 31. It is supposed to let you.

  The compressor 61 constituting the heat pump 60 is connected in parallel between the rectifier circuit 85 and the inverter circuit 86 for the motor 31 via the inverter circuit 91. When the inverter circuit 91 is controlled by the controller 100, the compressor 61 is activated. The temperature sensor 65 is connected to the controller 100, and the controller 100 controls the inverter circuit 91 (compressor 61) while detecting the temperature of the compressor 61.

  A DC / DC converter 92 (switching element) is connected in parallel between the rectifier circuit 85 and the inverter circuit 86 for the motor 31. When the DC / DC converter 92 operates in accordance with a command from the controller 100, the DC power from the rectifier circuit 85 is stepped down.

  The output terminal of the DC / DC converter 92 is controlled by the controller 100 to circulate the washing water and the like through the inverter circuit 93 that generates a three-phase alternating current, the changeover switch 94, and the fan 51 that circulates air during drying. It is connected to the circulation pump 24.

  The change-over switch 94 is a switch that switches the three-phase alternating current generated in the inverter circuit 93 to the fan 51 or the circulation pump 24 and outputs it, and is controlled by the controller 100. Thus, the fan 51 and the circulation pump 24 that do not operate simultaneously share the inverter circuit 93 via the changeover switch 94, thereby reducing the number of components.

  An inverter circuit 95 is connected to the output terminal of the DC / DC converter 92 so as to be in parallel with the inverter circuit 93. The inverter circuit 95 is controlled by the controller 100 and generates a three-phase alternating current based on the electric power stepped down by the DC / DC converter 92 and outputs it to the pump 44 that pumps up bath water.

The drain valve 23 and the solenoid valves 41 to 43 and 45 to 46 are connected between the filter circuit 84 and the rectifier circuit 85 so that the drain valve 23 and the solenoid valves 41 to 43 and 45 to 46 are in parallel. The filter circuit 84 operates with AC power from the commercial power supply 80 from which noise has been removed.
Each parallel circuit including the drain valve 23 and the like is provided with switches 23A, 41A to 43A, and 45A to 46A that are turned ON / OFF by the controller 100, and these switches 23A and the like are N / OFF. Thus, the drain valve 23 and the like are opened and closed independently. That is, the controller 100 opens and closes the drain valve 23 and the electromagnetic valves 41 to 43 and 45 to 46 based on the temperature of the compressor 61 detected via the temperature sensor 65.

  The controller 100 is a control device configured to include a CPU, ROM, RAM, and the like, and relates to a washing course input via the operation unit 18 and washing, sipping, dehydrating, and drying stored in advance in the washing course. According to the program, the inverter circuit 86, the drain valve 23, etc. are controlled to perform washing, sipping, dehydration and drying. In addition, the controller 100 displays the selected washing course, the current washing situation, and the like on the display unit 19.

≪Effects of drum type washer and dryer≫
According to the drum type washing / drying machine 1, the following effects can be mainly obtained.
When the laundry W is dried, tap water or bath water flows through the cooling pipe C as cooling water, whereby the high-temperature refrigerant flowing through the radiator 62 is cooled. Thereby, in the radiator 62, the amount of heat that the refrigerant radiates to the air becomes small. Along with this, the temperature of the refrigerant flowing toward the pressure regulating valve 63 decreases, the temperature of the refrigerant after decompression and expansion at the pressure regulating valve 63 decreases, and the amount of heat that can be absorbed by the refrigerant increases.

Therefore, the refrigerant whose temperature has decreased can absorb a large amount of heat from the air flowing outside the heat absorber 64 in the heat absorber 64, and as a result, the temperature of the circulating air is prevented from rising. Therefore, it is possible to prevent the refrigerant temperature from reaching the allowable temperature of the compressor 61, and the compressor 61 can continue to operate under the operating condition in which the heating efficiency in the radiator 62 is maximized. There is no need to change operating conditions such as reducing the speed.
Further, since hot and humid air is not discharged to the outside, the humidity of the washing machine place does not increase.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and may be appropriately changed without departing from the spirit of the present invention.
In the above-described embodiment, the configuration in which the temperature sensor 65 is provided in the compressor 61 and the temperature of the compressor 61 is detected is exemplified. However, the position of the temperature sensor 65 is not limited to this. It is good also as a structure which provides and detects the temperature of the compressor 61 indirectly.

  In the above-described embodiment, the cooling water after cooling discharged from the cooling pipe C is discharged to the drain hose 3f, but the cooling water after cooling is collected in a suitable tank, cooled after the temperature is lowered. It is good also as a structure supplied to the piping C for work again.

It is an external appearance perspective view of the drum-type washing and drying machine concerning this embodiment. It is a longitudinal cross-sectional view of the drum type washing / drying machine which concerns on this embodiment. It is a figure which shows the mechanical system structure of the drum type washing-drying machine which concerns on this embodiment. It is a figure which shows the control system structure of the drum type washing-drying machine which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum type washing dryer 10 Case 20 Outer tank 30 Rotating drum 51 Fan (blower means)
60 heat pump 61 compressor 62 radiator 63 pressure regulating valve (pressure reducing means)
64 heat absorber 65 temperature sensor (pressure reduction means)
100 controller (control means)
C Cooling piping W Laundry

Claims (5)

An outer tank whose inside becomes a drying chamber when drying;
A rotating drum that is rotatably arranged in the outer tub and accommodates laundry;
A compressor that compresses the refrigerant; a radiator that dissipates heat of the compressed refrigerant; a decompression unit that decompresses the pressure of the refrigerant; and a heat absorber that absorbs heat from the surroundings of the decompressed refrigerant. And a heat pump configured to circulate while repeating expansion,
With
When drying, a drum-type washing and drying machine in which air circulates in the order of the radiator, the outer tub, the heat absorber, and the radiator,
A drum-type washing and drying machine comprising a cooling pipe through which cooling water flows so as to cool the refrigerant flowing through the radiator.   The drum-type washing and drying machine according to claim 1, wherein the radiator includes fins, and the cooling pipe is thermally connected to the fins. Temperature detecting means for detecting the temperature of the compressor;
Control means for controlling the flow rate of the cooling water based on the temperature of the compressor detected by the temperature detection means;
The drum-type washing / drying machine according to claim 1 or 2, further comprising:   The drum type washing and drying machine according to any one of claims 1 to 3, further comprising a tap water supply means for supplying tap water as cooling water to the cooling pipe.   The drum type washing and drying machine according to any one of claims 1 to 4, further comprising bath water supply means for supplying bath water as cooling water to the cooling pipe.

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