JP5402836B2 - Dehumidifying and heating device and clothes dryer using the same - Google Patents

Description

  The present invention relates to a dehumidifying and warming device using a heat pump device and a clothes dryer for drying clothes using the same.

  Conventionally, as shown in FIGS. 7 to 9, this type of dehumidifying and warming device 51 is provided with a heat pump device 57 comprising a compressor 53, a radiator 54, a heat absorber 55, and a throttle means 56 in a housing 52. Has been. A temperature measuring unit 59 for measuring the temperature of the refrigerant discharged from the compressor 53 is installed in a pipe 58 that connects the compressor 53 and the radiator 54. A drain pan 60 that receives dehumidified water dehumidified by the heat absorber 55 is provided below the heat absorber 55, a drain outlet 61 that drains the dehumidified water collected in the drain pan 60, and a water level sensor that detects the dehumidified water. 62 is provided.

  The operation of the heat pump device 57 is as follows. The refrigerant compressed to a high temperature and high pressure by the compressor 53 enters the radiator 54 through the pipe 58 and exchanges heat with the air blown by a blower (not shown) to heat the air. The refrigerant is cooled and liquefied. The liquefied high-pressure refrigerant enters the throttle means 56 and is depressurized to become a low-temperature and low-pressure liquid refrigerant and enters the heat absorber 55. The air is cooled and dehumidified by exchanging heat with the air blown by the blower, and the refrigerant is heated to return to the compressor 53 as a vapor refrigerant.

  When the refrigerant discharge temperature of the compressor 53 exceeds a specified value, the lubricant in the compressor 53 deteriorates severely. Therefore, the temperature of the refrigerant discharged from the compressor 53 is measured by the temperature measuring unit 59, and the refrigerant discharge A safety measure is taken to stop the compressor 53 when the temperature exceeds a specified value.

  Further, the dehumidified water dehumidified by the heat absorber 55 is dropped onto the drain pan 60 provided below the heat absorber 55 by gravity, and is discharged out of the dehumidifying and heating device 51 from the drain port 61. The drain pan 60 is provided with a water level sensor 62 that detects an increase in the water level of the dehumidified water accumulated in the drain pan 60 when the drain outlet 61 is clogged with foreign matter, and prevents the dehumidified water from overflowing the drain pan 60. Yes.

  On the other hand, the flow of air will be described. The air sent from the air port 63 to the dehumidifying and warming device 51 by the blower first enters the heat absorber 55 and is cooled, and the temperature of the heat absorber 55 is below the saturation temperature of the air. Then, dew condensation occurs on the surface of the heat absorber 55 and is dehumidified. Then, it enters the heat radiator 54 and is heated to become high-temperature and low-humidity air, and exits the dehumidifying and heating device 51 from the exhaust port 64.

  In recent years, from the viewpoint of energy saving, a dehumidifying and warming device using such a heat pump device is used instead of a heater in a clothes dryer (see, for example, Patent Document 1).

  Further, in a washing / drying machine using a heat pump device, it is considered to detect the level of dehumidified water with a thermistor (see, for example, Patent Document 2).

JP 7-178289 A JP 2006-262924 A

  However, in the conventional configuration, since the water level sensor 62 is provided to detect the dehumidified water of the drain pan 60, a space for installing the water level sensor 62 is required, the apparatus is enlarged, and the configuration is complicated. There was a problem of becoming expensive.

  This invention solves the said conventional subject, and it aims at providing the dehumidification warming apparatus which can detect the waste_water | drain abnormality of dehumidification water with a simple structure.

A heat pump device in which a compressor, a radiator, a throttle means, and a heat absorber are connected by piping through which a refrigerant circulates; a wind circuit that flows from an air inlet through the heat absorber and the radiator to an air outlet; and the heat absorption A drain pan that receives dew condensation water generated by heat exchange with air in a cooler, a refrigerant temperature measurement device that measures the temperature of the refrigerant by a temperature measurement unit provided in a pipe that connects the compressor and the radiator, and the refrigerant temperature measurement A control device for controlling the operation of the compressor based on temperature measurement information from the device, and a part of a pipe connecting the compressor and the radiator is disposed close to the drain pan, and the temperature measurement unit is provided. The controller is disposed in the drain pan on the gravity direction side of the overflow line of the drain pan, and the control device operates the compressor when there is a rapid decrease in the temperature measured by the refrigerant temperature measuring device. Reduced the number predetermined time, the measured temperature is to be raised again, is obtained so as to stop the operation of the compressor.

  As a result, condensed water accumulates in the drain pan due to poor drainage, etc., and when the temperature measuring unit of the refrigerant temperature measuring device comes into contact with the condensed water, the temperature of the condensed water is significantly lower than the temperature of the refrigerant, and the measured temperature rapidly decreases. Therefore, it is possible to detect a drainage abnormality without providing a dedicated water level sensor.

  The dehumidifying and warming device of the present invention can detect a drainage abnormality of dehumidified water with a simple configuration and prevent the dehumidified water from overflowing.

The top view of the dehumidification warming apparatus in Embodiment 1 of this invention Block diagram of the dehumidifying and heating device BB sectional view of FIG. Time chart showing the operation of the dehumidifying and heating device Time chart showing the operation of the dehumidifying and warming device in Embodiment 2 of the present invention Sectional drawing of the principal part of the clothes dryer provided with the dehumidification heating apparatus in Embodiment 3 of this invention Top view of a conventional dehumidifying and heating device Side view of the dehumidifying and heating device AA sectional view of FIG.

A heat pump device in which a compressor, a radiator, a throttle means, and a heat absorber are connected by piping through which a refrigerant circulates; a wind circuit that flows from an air inlet through the heat absorber and the radiator to an air outlet; and the heat absorption A drain pan that receives dew condensation water generated by heat exchange with air in a cooler, a refrigerant temperature measurement device that measures the temperature of the refrigerant by a temperature measurement unit provided in a pipe that connects the compressor and the radiator, and the refrigerant temperature measurement A control device for controlling the operation of the compressor based on temperature measurement information from the device, and a part of a pipe connecting the compressor and the radiator is disposed close to the drain pan, and the temperature measurement unit is provided. and disposed within the drain pan in the gravity direction side than the overflow line of the drain pan, wherein the control device, when there is a sudden drop in temperature measured by the coolant temperature measuring device, the compressor operation times Reduced the number predetermined time, if increased the measured temperature is again the by the operation of the compressor were to stop, condensed water accumulates in the drain pan by poor drainage, etc., the temperature measuring unit of the refrigerant temperature measuring device When the water is in contact with condensed water, the temperature of the condensed water is significantly lower than the temperature of the refrigerant, and the measured temperature decreases rapidly.Therefore, a drainage abnormality can be detected with a simple configuration without installing a water level sensor. It is possible to prevent the dehumidified water from overflowing. Further, when the drainage is not completely defective, the operation can be continuously dehumidified by reducing the operation speed of the compressor and reducing the amount of condensation. Further, even if the operation speed is decreased for a predetermined time, if the measured temperature does not increase, it is determined that the drainage is completely defective, and overflow can be prevented.

In particular, the second invention is a clothes dryer equipped with the dehumidifying and warming device of the first invention, and provides a clothes dryer capable of detecting a drainage abnormality with a simple configuration without providing a water level sensor. can do.

  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)
1 is a top view of a dehumidifying and warming device according to a first embodiment of the present invention, FIG. 2 is a block diagram of the dehumidifying and warming device, FIG. 3 is a cross-sectional view taken along line BB in FIG. These are time charts which show operation | movement of the dehumidification warming apparatus.

  1 to 4, a compressor 2, a radiator 3, a throttle means 4, and a heat absorber 5 and a heat pump device 7 that connects these with a pipe 6 through which a refrigerant circulates are installed in a housing 1. A pipe 6 connecting the compressor 2 and the radiator 3 is provided with a temperature measuring unit 8 that measures the temperature of the refrigerant discharged from the compressor 2, and the temperature of the refrigerant measured by the temperature measuring unit 8 is the compressor 2 is input to the refrigerant temperature measuring device 10 of the control device 9 that controls the operation of No. 2.

  A drain pan 11 that receives dehumidified water dehumidified by the heat absorber 5 is provided below the heat absorber 5, and a drain port 12 that drains the dehumidified water collected in the drain pan 11 is provided. The pipe 6 has a part of the portion connecting the compressor 2 and the radiator 3 disposed close to the bottom of the drain pan 11, and the temperature measuring unit 8 configured by a thermistor or the like prevents the dehumidified water from overflowing from the drain pan 11. It is attached to the pipe 6 so that at least part or all of it is located below the set overflow line W in the gravity direction.

  The basic operation of the heat pump device 7 is the same as the conventional one, and the description will be simplified. The refrigerant compressed to high temperature and high pressure by the compressor 2 passes through the pipe 6 and enters the radiator 3 through a portion where the temperature measuring unit 8 is attached. Heat is exchanged with the air blown by a blower (not shown) in the radiator 3 to heat the air, and the refrigerant is cooled and liquefied. The liquefied high-pressure refrigerant enters the throttle means 4 and is decompressed to become a low-temperature and low-pressure liquid refrigerant and enters the heat absorber 5. The heat absorber 5 exchanges heat with the air blown by the blower, and the air is cooled and dehumidified, and the refrigerant is heated to become vapor refrigerant and returns to the compressor 2.

  When the refrigerant discharge temperature of the compressor 2 exceeds the specified value, the deterioration of the lubricating oil in the compressor 2 becomes severe. Therefore, the temperature of the refrigerant discharged from the compressor 2 is measured by the temperature measuring unit 8, and the refrigerant discharge temperature When the value exceeds the specified value, the control device 9 stops the operation of the compressor 2.

On the other hand, the flow of air dehumidified and warmed by the dehumidifying and warming device will be described. First, the air sent from the air inlet 13 provided in the housing 1 to the dehumidifying and warming device by the blower (not shown) Then, when the temperature of the heat absorber 5 becomes equal to or lower than the saturation temperature of the air, dew condensation occurs on the surface of the heat absorber 5 and is dehumidified. Thereafter, a wind circuit 15 is formed which enters the heat radiator 3 and is heated to become high-temperature and low-humidity air and exits from the air outlet 14 through the dehumidifying and warming device.

  Due to the operation of the heat pump device 7, the dehumidified water dewed by the heat absorber 5 falls to the drain pan 11, is collected, and is discharged out of the housing 1 from the drain port 12 at the bottom. If foreign matter such as lint is contained in the air blown by the blower, it adheres to dehumidified water condensed by the heat absorber 5 and accumulates in the drain pan 11.

  When a drainage failure such as the drainage port 12 being clogged with foreign matter or the like occurs, the dehumidified water accumulates in the drain pan 11. When the heat pump device 7 operates, the water level rises with the dehumidified water dewed by the heat absorber 5 and eventually exceeds the overflow line W, the dehumidified water overflows from the drain pan 11 and water leaks. When the water level in the drain pan 11 rises, the temperature measuring unit 8 comes into contact with the condensed water before exceeding the overflow line W.

  At this time, since the refrigerant discharged from the compressor 2 is at a high temperature, the measurement temperature of the temperature measuring unit 8 is greatly reduced by contact with the dew condensation water, and it is detected that drainage is not performed. Can do. And since a part of piping 6 which connects the compressor 2 and the heat radiator 3 is arrange | positioned close to the bottom part in the drain pan 11, when the water level in the drain pan 11 rises, the piping 6 arrange | positioned in the bottom part of A part of the pipe 6 comes into contact with the dew condensation water, and a part of the pipe 6 can be cooled together with the temperature measuring unit 8 to clearly measure the temperature drop.

  Therefore, as shown in FIG. 4, when the temperature measuring unit 8 comes into contact with the condensed water accumulated in the drain pan 11 and the measured temperature becomes equal to or lower than the set value, the control device 9 that controls the operation of the compressor 2 controls the compressor 2. The operation can be stopped to prevent water leakage, and a drainage abnormality can be detected without providing a water level sensor in the drain pan 11.

(Embodiment 2)
FIG. 5 is a time chart showing the operation of the dehumidifying and warming device according to the second embodiment of the present invention. A feature of the present embodiment is that the compressor 2 is configured to be able to vary the rotational speed of an inverter or the like, and the control device 9 operates the compressor 2 when there is a rapid decrease in the temperature measured by the refrigerant temperature measuring device 10. This means that the operation of the compressor 2 is stopped if the rotational speed is decreased by a predetermined time t and the measured temperature does not rise again. Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the detailed description of the first embodiment is used.

  With the above configuration, when the drainage is not complete, dehumidification can be continuously performed by reducing the operating speed of the compressor 2 and reducing the amount of condensation. Even when the operation speed is decreased and the operation is performed for a predetermined time t, if the measured temperature does not increase, it is determined that the drainage is completely defective, and the operation of the compressor 2 can be stopped to prevent overflow. .

(Embodiment 3)
FIG. 6 is a cross-sectional view of a main part of a clothes dryer provided with the dehumidifying and heating device of the present invention. The configuration of the dehumidifying and warming device is the same as that of the first embodiment, and the same reference numerals are given, and the detailed description uses that of the first embodiment.

The clothes dryer of the present embodiment is a laundry dryer having a washing function, and can perform washing, rinsing, dehydration, and subsequent drying. A water tank 22 for storing washing water is elastically supported in a casing 21 of the washing / drying machine, and a drum 23 is rotatably disposed in the water tank 22. The drum 23 functions as a washing tub, a dewatering tub, and a drying tub. On the front side of the drum 23, an opening 24 through which clothes such as clothes are taken in and out of the drum 23 is provided and can be opened and closed by a door 25.

  The drum 23 is driven to rotate in the forward and reverse directions by a motor 26 attached to the back side of the water tank 22, and at the time of washing and rinsing, a predetermined amount of washing water set according to the amount of laundry loaded is supplied. The laundry in the drum 23 is agitated, and the washing action that falls in the drum 23 rotates at a speed that reaches the laundry for a predetermined time. At the time of dehydration, centrifugal force acts on the laundry and rotates at a high speed sticking to the inner peripheral side surface of the drum 23, and the wash water dehydrated from the laundry is discharged from the water tank 22 to the outside of the casing 21.

  Furthermore, at the time of drying, the operation of stirring the laundry in the drum 23 is performed following the operation of loosening the laundry stuck during dehydration. At this time, the drying air dehumidified and warmed by the dehumidifying and warming device is introduced into the drum 23. Dry, high-temperature drying air that has exited from the air outlet 14 of the dehumidifying and warming device is introduced into the water tank 22 from the inlet 27 provided at the upper part on the back side of the water tank 22 by the blower 29.

  A large number of holes (not shown) are provided on the inner peripheral side surface of the drum 23, and the drying air introduced into the water tank 22 from the holes enters the drum 23 and is stirred in the drum 23. Contact with objects. The drying air that has become moist after removing moisture from the laundry enters the water tank 22 through a large number of holes provided on the peripheral side surface of the drum 23, and from the outlet 28 provided at the upper part on the front side of the water tank 22. It passes through the air inlet 13 and flows through the wind circuit 15 of the dehumidifying and warming device.

  The air sent from the air inlet 13 to the dehumidifying and warming device is cooled and dehumidified by the heat absorber 5, and then enters the radiator 3 and is heated to become high-temperature and low-humidity air from the air outlet 14 to the inlet 27. Led to. Thus, the drying air dehumidified and warmed by the dehumidifying and warming device enters the drum 23 from the inlet 27 and returns to the dehumidifying and warming device 30 from the outlet 28 as indicated by the arrow a. It circulates and advances the drying of the laundry in the drum 23.

  In the present embodiment, the washing / drying machine having a washing function has been described. However, the same applies to a clothes drying machine that does not have a washing function and only dries clothes.

  As described above, the dehumidifying / warming device and the clothes dryer according to the present invention can detect an abnormal drainage of the dehumidified water with a simple configuration and prevent the dehumidified water from overflowing. Useful as a clothes dryer.

DESCRIPTION OF SYMBOLS 2 Compressor 3 Radiator 4 Throttling means 5 Heat absorber 6 Piping 7 Heat pump apparatus 8 Temperature measurement part 9 Control apparatus 10 Refrigerant temperature measurement apparatus 11 Drain pan 15 Wind circuit

Claims (2)

A heat pump device in which a compressor, a radiator, a throttle means, and a heat absorber are connected by piping through which a refrigerant circulates; a wind circuit that flows from an air inlet through the heat absorber and the radiator to an air outlet; and the heat absorption A drain pan that receives dew condensation water generated by heat exchange with air in a cooler, a refrigerant temperature measurement device that measures the temperature of the refrigerant by a temperature measurement unit provided in a pipe that connects the compressor and the radiator, and the refrigerant temperature measurement A control device for controlling the operation of the compressor based on temperature measurement information from the device, and a part of a pipe connecting the compressor and the radiator is disposed close to the drain pan, and the temperature measurement unit is provided. and disposed within the drain pan in the gravity direction side than the overflow line of the drain pan, wherein the control device, when there is a sudden drop in temperature measured by the coolant temperature measuring device, the compressor operation times It reduced the number predetermined time, if increased the measured temperature is again dehumidifying heating device designed to stop the operation of the compressor. A clothes dryer equipped with the dehumidifying and warming device according to claim 1 .

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