JP2009034306A - Clothes dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To raise the temperature of an evaporator during drying in a low outside air temperature state, and to shorten the drying time. <P>SOLUTION: The heat source of an oblique drum type washing/drying machine is a heat pump device 20 for which the evaporator 21 and a condenser 23 are closely disposed, and a pressure reduction means 32 is formed as a variable type. When the outside air temperature is low, the degree of pressure reduction is lowered to lower the differential pressure of the condenser 23 and the evaporator 21, the temperature of the evaporator 21 is raised to prevent freezing by the dew condensation water of the evaporator 21, an evaporating action and a condensing action are demonstrated, and extension of the drying time is suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

  In this type of conventional drying apparatus, a drying apparatus having a heat pump device as a drying means is known (see Patent Document 1).

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

  FIG. 7 shows a drum-type clothes dryer, in which a rotating drum 53 that rotates about a horizontal axis 52 as a central axis is arranged in a casing 51.

  A clothing insertion port 54 formed on the front surface of the rotating drum 53 is opened on the front surface of the housing 51 and is opened and closed by a door 55.

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

  Reference numeral 62 denotes a motor whose rotation is transmitted to the rotating drum 53 and the fan 65 via belts 63 and 64.

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

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

  The operation of the washing and drying machine configured as described above will be described below.

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

The high-temperature and low-humidity air is supplied from the air supply port 61 to the drying chamber 56 and is used for drying the clothing A therein.
JP 7-178289 A

  However, in the conventional configuration, when the heat pump is operated and the drying operation is started in a state where the outside air temperature (the ambient temperature of the washing and drying machine) is relatively low as in winter, the temperature of the evaporator 66 becomes low. In a short time, moisture contained in the circulating air may adhere to the evaporator 66 as frost, and the evaporator 66 may freeze due to the growth of the frost.

  As a result, the water evaporated from the clothes in the rotary drum 53 is difficult to condense on the evaporator 66, and the temperature in the drying chamber 56 may be lowered.

  Such a state has a problem that drying efficiency is reduced, drying takes a long time, and electric power is consumed more than necessary.

  In order to solve the above-described conventional problems, the clothes drying apparatus of the present invention circulates the refrigerant when the temperature of the circulating air or the outside air temperature (the ambient temperature of the washing dryer) used for drying is lower than a predetermined temperature, that is, the so-called low outside air temperature. The pressure reducing means of the pressure reducing means provided in the circuit (heat pump cycle) is reduced to reduce the pressure difference between the condenser and the evaporator.

  Furthermore, by setting the state in which the pressure difference between the condenser and the evaporator is reduced to a predetermined time from the start of operation, after the predetermined time has elapsed, the pressure difference between the condenser and the evaporator is returned to an efficient state and dried. It is intended to improve efficiency.

  As a result, the evaporation temperature of the evaporator at the start of the drying operation can be kept relatively high, and as a result, freezing of the evaporator is suppressed, and conditions for adhering moisture to the evaporator without freezing are generated. It is something that can be done.

  According to the present invention, by preventing the evaporator from freezing at a low outside air temperature, it is possible to suppress the temperature drop of the clothes in the rotating drum, and as a result, the drying time and the power consumption can be reduced.

  The invention according to claim 1 is a main body provided with a bottomed cylindrical water tank, a rotary drum rotatably disposed in the water tank, and a garment or the like placed on the rotary drum. A clothes drying device comprising an opening that enables opening, a lid that opens and closes the opening, and an air circulation device that circulates air in the water tank, wherein the air circulation device cools at least the circulating air A heat source device for heating, a circulation duct provided on both sides of the heat source device and having both ends opened in the water tank, and provided in the heat source device or the circulation duct, and circulating air from the heat source device into the water tank Further comprising a refrigerant circulation circuit comprising a compressor, a condenser, a pressure reducing means, and an evaporator, and the pressure reducing means is a variable pressure reducing type capable of controlling the degree of pressure reduction. More , Provided with temperature detecting means for detecting the temperature inside or outside the main body, and provided with variable pressure reducing means for reducing the degree of pressure reduction of the pressure reducing means when the temperature detecting means detects a temperature below a predetermined value. It is.

  By adopting such a configuration, when the outside air temperature is low, the pressure difference between the condenser and the evaporator becomes small, the evaporation temperature of the evaporator can be kept high, and the moisture contained in the circulating air is supplied to the evaporator. Freezing can be suppressed. As a result, a transient temperature drop of the circulating air can be suppressed, moisture contained in the circulating air can be condensed while suppressing freezing, and the dried air such as clothes can be efficiently used as the dried air with less moisture. Can be dried.

  According to a second aspect of the present invention, in the first aspect of the invention, the variable pressure reducing means includes a plurality of pressure reducers arranged in parallel and a valve that controls the opening and closing of the flow of at least one refrigerant in the pressure reducer. The valve device is opened by detecting the low temperature of the temperature detecting means.

  With such a configuration, a simple configuration for controlling the opening / closing operation of the valve device is achieved, and the control device can be simplified.

  According to a third aspect of the invention, in the first aspect of the invention, the variable pressure reducing means is an electric expansion valve that controls the flow rate of the refrigerant, and the electric expansion is detected by detecting a low temperature of the temperature detecting means. The valve opening degree of the valve is operated in the opening direction.

  As a result, the temperature of the condenser and the evaporator can be controlled over a wide range. As a result, the pressure difference between the condenser and the evaporator can be controlled according to the situation of the low outside air temperature. The reliability of freezing suppression of the vessel can be increased. Furthermore, the transient temperature rise of the compressor accompanying the continuation of the operation can be suppressed by controlling the degree of pressure reduction.

  According to a fourth aspect of the present invention, there is provided a timer device according to the second or third aspect of the present invention, wherein a timer device that maintains the opening operation of the valve device or the opening operation of the electric expansion valve for a predetermined time is provided.

  As a result, the pressure difference between the condenser and the evaporator can be returned to an efficient state after the condition that the temperature of the circulating air does not decrease, and the drying efficiency can be improved.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the evaporator and the condenser are arranged close to each other, and these are inclined so that the evaporator is on the lower surface side. Are arranged.

  By adopting such a configuration, the dripping of the condensed water attached to the evaporator can be smoothly dropped, and the loss of the heat dissipation action of the condenser due to the condensed water adhering to the condenser can be suppressed, thereby preventing the drying efficiency from being lowered. It can be done.

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

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

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

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

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

  The blower 11 constituting the blowing means includes a fan 11a and a motor 11b for driving the fan 11a, and is located in a corner space (upper part of the casing 1) formed by the upper surface 1b of the casing 1 and the water tank 3. It is provided as follows. An evaporator (heat absorber) 21 and a condenser (heat radiator) 23, which are fin-tube heat exchangers constituting the heat pump device 20 (FIG. 2), are arranged close to each other at the lower part of the rear surface 1c of the housing 1. And the accommodated heat exchange air path 25 is arrange | positioned.

  Inside the heat exchange air passage 25, there are provided a heat absorber air passage 22 through which air flows from the direction of arrow b to the evaporator 21, and a radiator air passage 24 through which air flows from the condenser 23 in the direction of arrow c. It has been.

  Further, the heat absorber air passage 22 is connected to a discharge duct 26 communicating with the discharge side of the blower 11, and the radiator air passage 24 is connected to an air supply duct 27 opened in the water tank 3.

  The water tank 3 and the suction side of the blower 11 are connected by an exhaust duct 28, and a filter 29 that captures washing waste, yarn waste, and the like scattered with drying is provided in the middle of the exhaust duct 28 in a detachable manner. Yes.

  Here, the discharge duct 26, the air supply duct 27, and the exhaust duct 28 correspond to the circulation duct of the present invention.

  Therefore, the drying air blown by the blower 11 flows from the discharge duct 26 to the heat absorber air passage 22 as shown by the arrow a, passes through the evaporator 21 and the condenser 23, and is supplied as shown by the arrow c. It flows into the air duct 27, flows through the air supply duct 27 as shown by the arrow d, and flows into the water tank 3 from an air supply port (not shown) provided in the water tank 3.

  And it flows to the peripheral wall side of the rotating drum 5, is blocked by the sealing member 12, flows into the rotating drum 5 from a large number of through holes 5a as indicated by an arrow e, and is provided outside the water tank 3 as indicated by an arrow f. From the exhaust port (not shown) through the exhaust duct 28 and back to the suction side of the blower 11, the above flow is performed for a predetermined time.

  The discharge duct 26 is provided with a bimetal thermoswitch 30 that detects the temperature of the air flowing through the blower 11. The bimetal thermo switch 30 may detect the temperature of the air around the washing / drying machine.

  As shown in FIG. 2, the heat pump device 20 has a configuration in which a compressor 31, a condenser 23, a decompression means 32, and an evaporator 21 are connected in an annular shape, and the decompression means 32 is a first capillary tube 32a connected in parallel. The second capillary tube 32b is provided in series with the second capillary tube 32b, and includes an on-off valve 33 that controls the flow of the refrigerant in the capillary tube 32b.

  The resistance values of the first capillary tube 32a and the second capillary tube 32b are the same in the first embodiment, but the first, the first, and the like, depending on the capabilities of the compressor 31, the condenser 23, and the evaporator 21, respectively. The resistance values of the second capillary tubes 32a and 32b can be set.

  The on-off valve 33 is normally in a closed state, and performs an opening operation by an output operation of the control device 34 that operates in accordance with an ON operation of the bimetal thermoswitch 30 (an operation that detects a temperature of a predetermined value or less).

  Next, main operations of the washing / drying machine having the above-described configuration will be described. Here, the operation described below is a case where the outside air temperature (ambient temperature of the washing and drying machine) is relatively high.

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

  In the next rinsing step after washing, water is supplied into the water tub 3 in the same manner as the above-described washing step, and then the garment 4 is rinsed by rotating the rotating drum 5.

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

  And when the above-mentioned dehydration process is completed, it will move to a drying process. In this drying process, the compressor 31 of the heat pump apparatus 20 is operated. As a result, the refrigerant is compressed, and this pressure circulates through the condenser 23, the decompression means 32, and the evaporator 21. In the condenser 23, heat is released by the compression of the refrigerant, and in the evaporator 21, the heat is absorbed by the refrigerant which has been decompressed by the decompression means 32 and becomes a low pressure. In parallel with this, the blower 11 is operated, and warm air heated by the heat radiation of the condenser 23 is blown into the water tank 3 through the supply duct 27 from the supply port. At this time, the rotary drum 5 is rotationally driven by the drive motor 6, and the garment 4 is stirred up and down.

  Accordingly, the drying air heated by the radiator 23 is blown into the rotary drum 5 from the air supply port by the blower 11. The hot air supplied into the rotating drum 5 takes moisture when passing through the gaps of the clothing 4, passes through the blower 11 from the exhaust duct 28 through the exhaust port of the water tank 3 in the wet state, and exchanges heat from the discharge duct 26. It flows to the air path 25 and reaches the evaporator 21.

  When the wet warm air passes through the evaporator 21, sensible heat and latent heat are taken away and dehumidified, and separated into dry air and condensed water.

  When the dried air subsequently passes through the condenser 23, it is heated again by the condenser 23 to become hot air, and is supplied again into the water tank 3 and the rotating drum 5, and the above-described circulation is repeated thereafter.

  On the other hand, when the condensed water adheres to the evaporator 21 and saturates and falls, the condensed water is stored in a water storage chamber (not shown) provided at the lower portion and pumped up by a drain pump (not shown) and drained hose. 10 is discharged outside the machine.

  In this way, by using the heat pump device 20 for drying the clothing 4 and the like, the heat absorbed by the evaporator 21 is recovered by the refrigerant and radiated again by the condenser 23, and the amount of heat more than the input energy of the compressor 31 is obtained. Since it can give to the clothing 4, a drying efficiency can be improved. Therefore, shortening of the drying time and energy saving can be realized.

  In the drying step, when the outside air temperature (indoor temperature or circulating air temperature) is a predetermined value or higher, for example, 5 ° C. or higher, the decompression means 32 in the heat pump device 20 performs the decompression operation set by the first capillary tube 32a. Thus, the evaporator 21 also acts to have a predetermined low temperature.

  On the other hand, when the outside air temperature is equal to or lower than a predetermined value, when the heat pump device 20 is operated at the same degree of decompression at a so-called low outside air temperature, the evaporator 21 becomes transiently low in temperature, and as a result, contains moisture such as clothing 4. When the dry air passes through the evaporator 21, the moisture freezes to become frost, and when the operation is continued, the evaporator 21 freezes and moisture cannot be condensed.

  Next, the drying operation at a low outside air temperature will be described. Here, since the washing process to the dehydration process are the same as described above, the description thereof will be omitted and the drying process will be described here. Further, the compressor 31 is controlled by the inverter control device so that its rotation speed (capacity) is well known, but may be a compressor operated at a constant speed.

  When the outside air temperature is low, the bimetal thermoswitch 30 detects the temperature as shown in FIG. 3, and the on-off valve 33 is open. As a result, the decompression degree of the decompression means 32 is the decompression degree formed by the parallel circuit of the first and second capillary tubes 32a and 32b (in the first embodiment, half the decompression degree by the first capillary tube 32a). Thus, the degree of decompression is smaller than in the above case.

  In this state, when the blower 11 and the compressor 31 are operated, the refrigerant flows through the condenser 23, the first and second capillary tubes 32 a and 32 b, and the evaporator 21, and returns to the compressor 31. Due to the continuation of the refrigerant flow, the temperature of the condenser 23 gradually increases, and the temperature of the evaporator 21 gradually decreases.

  However, since the degree of decompression by the decompression means 32 is small, the evaporator 21 does not suddenly become low temperature.

  In other words, the temperature of the evaporator 21 continues to operate at a temperature slightly lower than the circulating air temperature, but its decrease is dull. On the other hand, the heating accompanying the heat radiation of the condenser 23 acts.

  In that state, the operating frequency of the compressor 31 is controlled to be gradually higher, and the input energy of the compressor 31 is gradually increased accordingly. The temperature of the dry air that rises gradually increases.

  When the bimetal thermoswitch 30 detects the OFF temperature after the time ΔT1 has elapsed, the on / off valve 33 is closed by the control device 34, and the pressure reduction degree of the pressure reducing means 32 becomes the pressure reduction degree by the first capillary tube 32a.

  Since this state is set to a value at which the heat pump device 20 can exhibit high efficiency, both the heat radiation amount and the heat absorption amount by the heat pump device 20 increase, and the drying efficiency can be increased by reducing the humidity of the dry air. .

  In this state, when the temperature of the dry air that circulates again decreases, the bimetal thermoswitch 30 is turned on as described above, and the degree of decompression of the decompression means 32 is reduced to suppress the transient temperature decrease of the evaporator 21. Therefore, freezing of the evaporator 21 is suppressed, and as a result, it is possible to prevent the drying operation from being significantly reduced.

  In the first embodiment, the bimetal thermoswitch 30 is configured to serve as both the temperature detection means of the present invention and a timer device that regulates the opening operation of the on-off valve 33.

  Therefore, according to the first embodiment, it is possible to prevent freezing of the evaporator 21 due to a transient temperature decrease of the evaporator 21 at the time of low outside air temperature, particularly at the start of the drying process, and to form a continuous drying process. Can do. As a result, it is possible to reduce the moisture of the circulating dry air, and to efficiently dry an object to be dried such as clothing.

(Embodiment 2)
FIG. 4 is a system conceptual diagram of the oblique drum type washing and drying machine in Embodiment 2 of the present invention. FIG. 5 is a control pattern diagram showing the control contents at the low outside air temperature in the oblique drum type washing and drying machine.

  In this Embodiment 2, since the structure of a washing-drying machine is made the same as Embodiment 1, it demonstrates centering on a different part here. In addition, the same constituent elements as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 4, the part that is particularly different from the first embodiment is that a temperature detection unit 35 typified by a thermistor element or the like is provided in the discharge duct 26, and an electric expansion valve 36 is adopted as the pressure reducing means. The control device 37 is provided with a timer function (timer device). Here, you may make it the temperature detection part 35 detect the ambient air temperature in which the washing dryer is installed.

  In such a configuration, when the ambient temperature of the washing / drying machine or the temperature in the discharge duct 26 is equal to or higher than a predetermined value, the washing process, the rinsing process, the dehydrating process, and the drying process are performed in the same manner as in the first embodiment. .

  Next, the drying operation at a low outside air temperature will be described. Here, since the washing process to the dehydration process are the same as described above, the description thereof will be omitted and the drying process will be described here. Further, the compressor 31 is controlled by the inverter control device so that its rotation speed (capacity) is well known, but may be a compressor operated at a constant speed.

  When the outside air temperature is low, the temperature detector 35 detects the temperature, and simultaneously with the start of the drying process, the timer device operates as shown in FIG. 5 and starts counting the time ΔT2.

  At substantially the same time, the control device 37 controls the electric expansion valve 36 in the direction in which the opening degree increases, and the compressor 31 is driven. Due to the effect of increasing the valve opening degree of the electric expansion valve 36, the degree of pressure reduction in the heat pump device 20 becomes smaller than when no low outside air temperature is detected, and the differential pressure between the condenser 23 and the evaporator 21 is small.

  In this state, when the blower 11 is operated and the operation of the compressor 31 is continued, the refrigerant flows through the condenser 23, the electric expansion valve 36, and the evaporator 21, and returns to the compressor 31. Due to the continuation of the refrigerant flow, the temperature of the condenser 23 gradually increases, and the temperature of the evaporator 21 gradually decreases.

  However, since the degree of pressure reduction by the electric expansion valve 36 is small, the evaporator 21 does not suddenly become low temperature.

  In other words, the temperature of the evaporator 21 continues to operate at a temperature slightly lower than the circulating air temperature, but its decrease is dull. On the other hand, the heating accompanying the heat radiation of the condenser 23 acts.

  In that state, the operating frequency of the compressor 31 is controlled to be gradually higher, and the input energy of the compressor 31 is gradually increased accordingly. The temperature of the dry air that rises gradually increases.

  When the timer device counts a preset time ΔT2, the opening degree of the electric expansion valve 36 is controlled in the closing direction by the control device 37, and the pressure reduction degree of the pressure reducing means is a value at which the heat pump device 20 can exhibit high efficiency. Set to As a result, both the amount of heat released and the amount of heat absorbed by the heat pump device 20 are increased, and the drying efficiency can be increased by reducing the humidity of the dry air.

  In this state, when the temperature of the dry air that circulates again decreases, the temperature detector 35 detects the temperature as described above, and the degree of pressure reduction of the electric expansion valve 36 is reduced to change the transient temperature of the evaporator 21. In order to suppress the decrease, the freezing of the evaporator 21 is suppressed, and as a result, it is possible to prevent the drying operation from being significantly reduced.

  In the second embodiment, the degree of pressure reduction by the electric expansion valve 36 is controlled after measuring the time ΔT2 by the timer device, but the timer device is excluded, and the temperature detector 35 detects the temperature in the discharge duct 26. When the temperature reaches a temperature at which it is difficult for the evaporator 21 to freeze, the valve opening degree of the electric expansion valve 36 may be controlled.

  Therefore, according to the second embodiment, the evaporator 21 can be prevented from freezing due to the transient temperature drop of the evaporator 21 at the time of the low outside air temperature, particularly at the start of the drying process, and a continuous drying process can be formed. Can do. As a result, it is possible to reduce the moisture of the circulating dry air, and to efficiently dry an object to be dried such as clothing.

  Moreover, since the low outside air temperature state is determined based on the temperature detected by the temperature detection unit 35, the measurement time of the timer device can be changed according to the detected temperature value, and according to the low outside air temperature state. Freezing of the evaporator 21 can be suppressed more reliably.

(Embodiment 3)
FIG. 6 is a cross-sectional view of an oblique drum type washing and drying machine in Embodiment 3 of the present invention.

  In this Embodiment 3, since the control at the time of the low outside temperature of a washing / drying machine is made the same as Embodiment 1 or 2, it demonstrates here centering on a different component. In addition, the same constituent elements as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The part that is particularly different from the first embodiment is that the evaporator 21 and the condenser 23 arranged in the heat exchange air passage 25 are both inclined to the windward side.

  As a result, the evaporator 21 becomes the lower surface side. As a result, it is possible to suppress the adhesion of the condensed water adhering to the evaporator 21 to the condenser 23, and to suppress the inhibition of the heat dissipation of the condenser 23 accompanying the adhesion of the condensed water. The heat dissipation of the condenser 23 is allowed to act on the drying of the circulating air to prevent the drying efficiency from being lowered.

  In addition, the inclined arrangement of the evaporator 21 makes it easy to collect the condensation treatment of the condensed water adhering to the evaporator 21 in one place, thereby increasing the certainty of the treatment and suppressing the decrease in the drying efficiency.

  The clothes drying apparatus according to the present invention prevents freezing of the evaporator at low outside air temperature and suppresses a decrease in drying efficiency, and stores the clothes under conditions of low humidity storage in addition to drying clothes etc. It can be applied to the above.

Sectional drawing of the diagonal drum type washing-drying machine in Embodiment 1 of this invention System conceptual diagram of the oblique drum type washing and drying machine in the first embodiment The control pattern figure which shows the control content at the time of the low outside temperature of the diagonal drum type washing-drying machine in Embodiment 1 System conceptual diagram of the oblique drum type washing and drying machine in Embodiment 2 of the present invention The control pattern figure which shows the control content at the time of the low external temperature of the diagonal drum type washing-drying machine in Embodiment 2 Sectional drawing of the diagonal drum type washing-drying machine in Embodiment 3 of this invention Sectional view of a drum type washing and drying machine showing a conventional example

Explanation of symbols

1 Housing (main body)
1a Opening 3 Water tank 4 Clothes 5 Rotating drum 7 Door (lid)
DESCRIPTION OF SYMBOLS 11 Blower 20 Heat pump apparatus 21 Evaporator 23 Condenser 25 Heat exchange air path (circulation duct)
26 Discharge duct (circulation duct)
27 Air supply duct (circulation duct)
28 Exhaust duct (circulation duct)
30 Bimetal thermo switch (temperature detection means, timer device)
31 Compressor 32 Pressure reducing means 32a First capillary tube (pressure reducing means)
32b Second capillary tube (pressure reduction means)
33 On-off valve (pressure reduction variable means)
34 control device 35 temperature detection part (temperature detection means)
36 Electric expansion valve (pressure reduction variable means)
37 Control device (timer device)

Claims (5)

A main body provided with a bottomed tubular water tank, a rotating drum rotatably disposed in the water tank, an opening provided in the main body and allowing clothes or the like to be put into the rotating drum, A clothes drying apparatus comprising a lid that opens and closes an opening, and an air circulation device that circulates air in the water tank,
The air circulation device is provided at least in a heat source device that cools and heats the circulating air, the heat source device is sandwiched between the circulation ducts that are open at both ends in the water tank, and the heat source device or the circulation duct. Consists of a circulating fan that circulates air from the heat source device into the water tank,
Furthermore, the heat source device is constituted by a refrigerant circulation circuit including a compressor, a condenser, a decompression unit, and an evaporator,
The pressure reducing means is a variable pressure reducing type capable of controlling the degree of pressure reduction,
Furthermore, a temperature detecting means for detecting the temperature inside or outside the main body is provided,
A clothes drying apparatus provided with a variable pressure reducing means for reducing the degree of pressure reduction of the pressure reducing means when the temperature detecting means detects a temperature equal to or lower than a predetermined value.   The pressure reducing variable means comprises a plurality of pressure reducers arranged in parallel, and a valve device that controls the opening and closing of the flow of at least one refrigerant in the pressure reducer, and by detecting the low temperature of the temperature detecting means, The clothing drying apparatus according to claim 1, wherein the valve device is opened.   The clothing according to claim 1, wherein the variable pressure reducing means is an electric expansion valve that controls the flow rate of the refrigerant, and the valve opening degree of the electric expansion valve is operated in the opening direction by detecting a low temperature of the temperature detection means. Drying equipment.   The clothing drying apparatus according to claim 2 or 3, further comprising a timer device for maintaining the opening operation of the valve device or the opening operation of the electric expansion valve for a predetermined time.   The clothes drying apparatus according to any one of claims 1 to 4, wherein the evaporator and the condenser are arranged close to each other and are inclined so that the evaporator is on the lower surface side.

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