JP2012143427A - Dehumidifying and heating apparatus and clothes dryer using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately detect abnormality of drainage of dehumidification water by improving sensitivity with a simple structure.SOLUTION: A dehumidifying and heating apparatus comprises: a drain pan 13 for receiving dew condensation water; a first coolant temperature measuring device 10 for measuring a temperature of a coolant with a first temperature measuring part 8 provided on a piping 6 connecting a compressor 2 and a radiator 3 to each other; a second coolant temperature measuring device 12 for measuring a condensation temperature inside the radiator 3 with a second temperature measuring part 11; and a control unit 9 for controlling an operation of the compressor 2 in accordance with temperature information obtained by the first coolant temperature measuring device 10 and the second coolant temperature measuring device 12. The first temperature measuring part 8 is disposed in the drain pan 13 in a portion lower in a gravity direction than an overflow line of the drain pan 13, and the control unit 9 intermittently lowers the number of revolution of the compressor 2.

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, this type of dehumidifying and warming device 51 includes a heat pump device 57 including a compressor 53, a radiator 54, a heat absorber 55, and a throttle means 56 in a housing 52, as shown in FIGS. 7 to 9. ing. 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 that the temperature of condensed water generated by dehumidification is detected by a thermistor and the compressor operation is stopped when an abnormal increase in the level of condensed water is detected. (For example, refer to 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.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a dehumidifying and warming device that can accurately detect the abnormality of drainage of dehumidified water with a simple configuration and increase the sensitivity.

  In order to solve the above-described conventional problems, the dehumidifying and heating device of the present invention is provided in a drain pan that receives condensed water generated by heat exchange with air in a heat absorber of a heat pump device, and a pipe that connects a compressor and a radiator. A first refrigerant temperature measuring device for measuring the temperature of the refrigerant by the first temperature measuring unit, a second refrigerant temperature measuring device for measuring the condensation temperature in the radiator by the second temperature measuring unit, A control device that controls the operation of the compressor based on temperature information measured by the first and second refrigerant temperature measurement devices, and the first temperature measurement unit is installed in the drain pan, and the control device includes: The rotation speed of the compressor is intermittently reduced.

  As a result, when condensed water accumulates in the drain pan due to defective drainage or the like, and the first temperature measurement unit of the first refrigerant temperature measuring device that measures the refrigerant temperature discharged from the compressor comes into contact with the condensed water, the temperature of the condensed water Since the temperature is lower than the temperature of the refrigerant, the measured temperature decreases. When the rotation speed of the compressor is decreased, the circulation amount of the refrigerant is decreased and the heat capacity flow rate is decreased. Therefore, when the first temperature measurement unit is in contact with the dew condensation water, the measurement temperature can be greatly decreased. Therefore, by increasing the sensitivity by intermittently reducing the rotation speed of the compressor during operation, the detection accuracy can be increased at predetermined intervals, and the water level abnormality in the drain pan can be detected accurately and accurately. .

  Further, the dehumidifying and warming device of the present invention includes a drain pan that receives condensed water generated by heat exchange with air in the heat absorber of the heat pump device, and a first temperature measurement unit provided in a pipe that connects the compressor and the radiator. A first refrigerant temperature measuring device for measuring the temperature of the refrigerant; a second refrigerant temperature measuring device for measuring the condensation temperature in the radiator by a second temperature measuring unit; and the first and second refrigerant temperatures. And a control device that controls the operation of the compressor based on temperature information measured by the measurement device, the first temperature measurement unit is installed in the drain pan, and the control device measures the first refrigerant temperature. When the temperature measured by the apparatus decreases to a predetermined temperature, the rotational speed of the compressor is decreased for a predetermined time.

  As a result, when condensed water accumulates in the drain pan due to defective drainage or the like, and the first temperature measurement unit of the first refrigerant temperature measuring device that measures the refrigerant temperature discharged from the compressor comes into contact with the condensed water, the temperature of the condensed water Since the temperature is lower than the temperature of the refrigerant, the measured temperature decreases. When the rotation speed of the compressor is decreased, the circulation amount of the refrigerant is decreased and the heat capacity flow rate is decreased. Therefore, when the first temperature measurement unit is in contact with the dew condensation water, the measurement temperature can be greatly decreased. Therefore, when the temperature measured by the first refrigerant temperature measuring device during operation is reduced to a predetermined temperature, the measured temperature can be greatly reduced by increasing the sensitivity by reducing the rotational speed of the compressor for a predetermined time. The water level abnormality in the drain pan can be detected accurately and accurately, and the operation of lowering the rotational speed of the compressor can be reduced to stabilize the operation of the compressor.

  The dehumidifying and warming device of the present invention can accurately detect the dehumidified water drainage abnormality with a simple configuration with high sensitivity.

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 first invention is a heat pump device in which a compressor, a radiator, a throttle means, and a heat absorber are connected by a pipe through which a refrigerant circulates, and flows from an air inlet to the air outlet through the heat absorber and the radiator. The temperature of the refrigerant is measured by a wind circuit, a drain pan that receives condensed water generated by heat exchange with the air at the heat absorber, and a first temperature measurement unit provided in a pipe that connects the compressor and the radiator. Temperature information measured by the first refrigerant temperature measuring device, the second refrigerant temperature measuring device that measures the condensation temperature in the radiator by a second temperature measuring unit, and the first and second refrigerant temperature measuring devices. And a control device for controlling the operation of the compressor, the first temperature measurement unit is installed in the drain pan, and the control device intermittently reduces the rotational speed of the compressor. As a result, the condensed water accumulates in the drain pan due to defective drainage or the like, and the first temperature measuring unit of the first refrigerant temperature measuring device that measures the refrigerant temperature discharged from the compressor comes into contact with the condensed water. Since the temperature is lower than the temperature of the refrigerant, the measured temperature decreases. When the rotation speed of the compressor is decreased, the circulation amount of the refrigerant is decreased and the heat capacity flow rate is decreased. Therefore, when the first temperature measurement unit is in contact with the dew condensation water, the measurement temperature can be greatly decreased. Therefore, by increasing the sensitivity by intermittently reducing the rotational speed of the compressor during operation, the detection accuracy can be increased at predetermined intervals, and the operation fluctuation of the heat bump cycle can be achieved without providing a dedicated water level sensor. It is possible to accurately and accurately detect the water level abnormality in the drain pan.

  In the second invention, in particular, the control device according to the first invention stops the operation of the compressor when the temperature measured by the first refrigerant temperature measuring device decreases to a predetermined temperature. Abnormal water drainage can be accurately detected and the progress of dehumidification can be stopped, and overflow of condensed water can be prevented.

According to a third aspect of the present invention, there is provided a heat pump device in which a compressor, a radiator, a throttle means, and a heat absorber are connected by a pipe through which a refrigerant circulates, and the air flows from the air inlet to the air outlet through the heat absorber and the radiator. The temperature of the refrigerant is measured by a wind circuit, a drain pan that receives condensed water generated by heat exchange with the air at the heat absorber, and a first temperature measurement unit provided in a pipe that connects the compressor and the radiator. Temperature information measured by the first refrigerant temperature measuring device, the second refrigerant temperature measuring device that measures the condensation temperature in the radiator by a second temperature measuring unit, and the first and second refrigerant temperature measuring devices. And a control device for controlling the operation of the compressor, the first temperature measurement unit is installed in the drain pan, and the control device has a temperature measured by the first refrigerant temperature measurement device. When the temperature decreases to a certain temperature, the rotation speed of the compressor is decreased for a predetermined time, so that condensed water accumulates in the drain pan due to defective drainage or the like, and the first refrigerant temperature for measuring the refrigerant temperature discharged from the compressor When the first temperature measurement unit of the measuring device comes into contact with the dew condensation water, the temperature of the dew condensation water is lower than the temperature of the refrigerant, so that the measurement temperature decreases. When the rotation speed of the compressor is decreased, the circulation amount of the refrigerant is decreased and the heat capacity flow rate is decreased. Therefore, when the first temperature measurement unit is in contact with the dew condensation water, the measurement temperature can be greatly decreased. Therefore, when the temperature measured by the first refrigerant temperature measuring device during operation is lowered to a predetermined temperature, the detection speed is increased and the measured temperature is increased by increasing the sensitivity by decreasing the rotational speed of the compressor for a predetermined time. It is possible to detect the water level abnormality in the drain pan accurately and accurately, distinguishing it from the fluctuations in the operation of the heat-bump cycle, and to reduce the rotation speed of the compressor without providing a dedicated water level sensor. The operation of the compressor can be stabilized by reducing the number of the compressors.

  According to a fourth aspect of the present invention, in particular, when the temperature measured by the first refrigerant temperature measuring device drops to a predetermined temperature lower than the temperature at which the rotation speed of the compressor is lowered, the control device of the third aspect of the invention By stopping the operation, it is possible to accurately detect the drainage abnormality of the condensed water and stop the progress of the dehumidification, and to prevent the overflow of the condensed water.

  In the fifth aspect of the invention, in particular, in the control device of any one of the first to fourth aspects of the invention, when the temperature measured by the first refrigerant temperature measuring device decreases to the temperature measured by the second refrigerant temperature measuring device. When the temperature measurement unit of the first refrigerant temperature measurement device comes into contact with the dew condensation water by stopping the operation of the compressor, it becomes lower than the refrigerant condensation temperature measured by the second refrigerant temperature measurement device. By setting the temperature at which the operation of the machine is stopped to the temperature measured by the second refrigerant temperature measuring device, it is possible to reliably detect the drainage abnormality of the condensed water and stop the progress of dehumidification.

  A sixth invention is a clothes dryer equipped with the dehumidifying and heating device of any one of the first to fifth inventions, and accurately detects a drainage abnormality with a simple configuration without providing a water level sensor. The clothes dryer which can be provided can be provided.

  In the seventh aspect of the invention, in particular, the clothes dryer of the sixth aspect of the invention is provided with a speed drying course, and the control device intermittently reduces the rotational speed of the compressor when setting the speed drying course, and the first refrigerant When the temperature measured by the temperature measuring device decreases to a predetermined temperature, the operation of the compressor is stopped. Especially, in the speed drying course, the compressor is operated at a high speed, so that the heat capacity flow rate of the refrigerant is reduced. Since the temperature increases when it comes into contact with the condensed water, the drainage abnormality can be accurately and accurately detected by increasing the sensitivity by reducing the rotational speed of the compressor.

  In the eighth invention, in particular, the clothes dryer of the sixth invention is provided with a speed drying course, and the control device sets the temperature measured by the first refrigerant temperature measuring device to a predetermined temperature when the speed drying course is set. When the pressure decreases, the rotation speed of the compressor is decreased for a predetermined time, and when the rotation speed of the compressor is decreased to a predetermined temperature lower than the temperature at which the rotation speed of the compressor is decreased, the operation of the compressor is reduced. Since the compressor is operated at a high speed rotation especially in the speed drying course, the heat capacity flow rate of the refrigerant increases and the temperature drop when contacting with condensed water is reduced. By increasing the sensitivity by lowering the rotational speed, it is possible to accurately detect drainage abnormalities and reduce the operation of reducing the rotational speed of the compressor. Create can be stabilized, it is possible to carry out the drying operation efficiently.

  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 in a housing 1,
A heat pump device 7 is provided in which these are connected by a pipe 6 through which a refrigerant circulates. The compressor 2 can change the rotation speed of an inverter or the like. A pipe 6 that connects the compressor 2 and the radiator 3 is provided with a first temperature measuring unit 8 that measures the temperature of the refrigerant discharged from the compressor 2, and the refrigerant measured by the first temperature measuring unit 8. Is input to the first refrigerant temperature measuring device 10 of the control device 9 that controls the operation of the compressor 2.

  Further, a second temperature measuring unit 11 that measures the condensation temperature of the refrigerant is provided in the radiator 3, and the temperature of the refrigerant measured by the second temperature measuring unit 11 is the second refrigerant of the control device 9. Input to the temperature measuring device 12. The first temperature measuring unit 8 and the second temperature measuring unit 11 are composed of a thermistor or the like.

  Below the heat absorber 5, a drain pan 13 that receives the dehumidified water dehumidified by the heat absorber 5 is provided, and a drain port 14 that drains the dehumidified water collected in the drain pan 13 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 13, and the first temperature measuring unit 8 constituted by a thermistor overflows the dehumidified water from the drain pan 13. It is attached to the pipe 6 so that at least a part or all of it is positioned below the overflow line W set so as not to fall in the direction of gravity.

  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 a high temperature and high pressure by the compressor 2 passes through the pipe 6 and enters the radiator 3 through a portion where the first 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 a specified value, the deterioration of the lubricating oil in the compressor 2 becomes severe. Therefore, the refrigerant temperature discharged from the compressor 2 is measured by the first temperature measuring unit 8, When the refrigerant discharge temperature becomes equal to or higher than a specified value, the control device 9 stops the operation of the compressor 2.

  In the heat pump cycle, the discharge temperature of the refrigerant discharged from the compressor 2 is higher than the condensation temperature, and the discharge temperature of the refrigerant (for example, 80 ° C. to 100 ° C.) is measured by the first temperature measurement unit 8. The condensation temperature (for example, 60 ° C. to 70 ° C.) is measured by the second temperature measuring unit 11. The discharge temperature of the refrigerant is controlled within a predetermined range in conjunction with the operation of the compressor 2, and when the rotation speed of the compressor 2 is kept constant, the vertical fluctuation range is small and about 1 deg.

  On the other hand, the flow of air dehumidified and warmed by the dehumidifying and warming device will be described. First, the air sent to the dehumidifying and warming device from the air inlet 15 provided in the housing 1 by a blower (not shown) is first the heat absorber 5. 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. After that, the wind circuit 17 is configured to enter the heat radiator 3 and be heated to become high-temperature and low-humidity air and to exit the dehumidifying and warming device from the air outlet 16.

  Due to the operation of the heat pump device 7, the dehumidified water dewed by the heat absorber 5 is collected by dropping into the drain pan 13 and discharged out of the housing 1 through the drain port 14 at the bottom. If foreign matter such as lint is contained in the air blown by the blower, it adheres to the dehumidified water condensed by the heat absorber 5 and accumulates in the drain pan 13.

When a drainage failure such as the drainage port 14 being clogged with foreign matter such as lint occurs, the dehumidified water is not drained from the drainage port 14 and is collected in the drain pan 13. Due to the operation of the heat pump device 7, the water level rises with the dehumidified water condensed by the heat absorber 5, and when it eventually exceeds the overflow line W, the dehumidified water overflows from the drain pan 13 and water leaks. Since a part of the pipe 6 connecting the compressor 2 and the radiator 3 is arranged close to the bottom part in the drain pan 13, when the water level in the drain pan 13 rises, a part of the pipe 6 arranged at the bottom part Comes into contact with the dew condensation water, and before the overflow line W is exceeded, a part of the pipe 6 together with the first temperature measurement unit 8 comes into contact with the dew condensation water.

  At this time, since the refrigerant discharged from the compressor 2 is at a high temperature, the first temperature measurement unit 8 is cooled and the measurement temperature is lowered by contacting the condensed water. At this time, if the refrigerant condensing temperature measured by the second temperature measuring unit 11 of the second refrigerant temperature measuring device 12 is a change within the second predetermined range, a heat pump such as a change in the rotational speed of the compressor 2 or the like. It can be determined that it is not due to a temperature drop due to cycle fluctuations but due to poor drainage, and the controller 9 that controls the operation of the compressor 2 stops the operation of the compressor 2 and stops the progress of dehumidification. Therefore, it is possible to prevent water leakage due to overflow of condensed water.

  That is, the first temperature measurement unit 8 monitors the discharge temperature of the refrigerant and the drainage abnormality of the condensed water, and also monitors the change in both the discharge temperature of the refrigerant and the condensation temperature, thereby accurately detecting the drainage abnormality. be able to.

  FIG. 4 shows changes in the refrigerant temperature measured by the first temperature measurement unit 8 and the second temperature measurement unit 11 and the rotational speed of the compressor 2. As the operation starts, both the refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 and the refrigerant condensing temperature measured by the second refrigerant temperature measuring device 12 rise gradually.

  The compressor 2 operates at a first predetermined rotation speed r1 (for example, 90 rps) set in a relatively high rotation range. The refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 is set to t1 (for example, 110 ° C.), controlled within a predetermined range in conjunction with the operation of the compressor 2, and the rotation speed of the compressor 2 Is kept constant, the vertical fluctuation range is small and about 1 deg. The refrigerant condensing temperature measured by the second refrigerant temperature measuring device 12 is t3 (for example, 70 ° C.).

  The control device 9 controls the operation of the compressor 2 so as to intermittently lower the rotational speed of the compressor 2 to a second predetermined rotational speed r2 (for example, 45 rps) after the operation is started. As a result, the refrigerant discharge temperature decreases from t1 to t2, and the refrigerant condensing temperature decreases from t3 to t4.

  At this time, in the section a, the refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 is higher than the predetermined temperature t4 because it is not in contact with the condensed water, and it can be determined that no drainage failure has occurred. The compressor 2 is operated at the original first predetermined rotation speed r1.

  The rotational speed of the compressor 2 is intermittently decreased from the first predetermined rotational speed r1 to the second predetermined rotational speed r2. When the rotation speed of the compressor 2 is decreased, the circulation amount of the refrigerant is decreased and the heat capacity flow rate is decreased. Therefore, when the first temperature measuring unit 8 is in contact with the condensed water, the measured temperature can be greatly decreased. .

  Therefore, the sensitivity can be intermittently increased by intermittently reducing the rotational speed of the compressor 2 during operation. The operation time T1 at the first predetermined rotation speed r1 is, for example, several tens of minutes (preferably 20 to 30 minutes), and the operation time T2 at the second predetermined rotation speed r2 is, for example, several tens of seconds ( Preferably it is 20-30 seconds.

Next, in the section b, the refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 is lower than the predetermined temperature t4. This is because the first temperature measuring unit 8 is in contact with the condensed water accumulated in the drain pan 13, and the amount of heat is deprived by the condensed water, so that the temperature is lowered. To stop.

  While the compressor 2 is operating at the first predetermined rotational speed r1, the heat capacity flow rate due to the circulation of the refrigerant is large, and the refrigerant discharge temperature decreases from the predetermined temperature t1 to t5 due to contact with the condensed water. The amount of decrease is small, and the rotational speed of the compressor 2 is intermittently decreased from r1 to r2, so that the detection accuracy can be increased and the measured temperature can be greatly decreased from t5. Can be detected.

  As described above, in the present embodiment, the first temperature measuring unit 8 provided in the pipe 6 that connects the compressor 2 and the radiator 3 is installed in the drain pan 13, and the control device 9 includes the compressor 2 is intermittently reduced, and by increasing the sensitivity by intermittently reducing the rotational speed of the compressor 2 during operation, the detection accuracy can be increased at predetermined intervals. The water level abnormality in the drain pan 13 can be accurately and accurately detected.

  In the present embodiment, the temperature at which the operation of the compressor 2 is stopped is the temperature (predetermined temperature t4) measured by the second refrigerant temperature measuring device. In the heat pump cycle, the refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 is always higher than the refrigerant condensing temperature measured by the second refrigerant temperature measuring device 12, and if there is no drainage abnormality, This relationship does not change even if the rotational speed is lowered. However, when the first temperature measuring unit 8 of the first refrigerant temperature measuring device 10 comes into contact with condensed water due to abnormal drainage, the condensed water is condensed by the low-temperature heat absorber 5 and thus is lower than the refrigerant condensation temperature.

  Therefore, the temperature measured by the first refrigerant temperature measuring device 10 becomes lower than the temperature measured by the second refrigerant temperature measuring device 12, and the temperature at which the operation of the compressor 2 is stopped is set to the second refrigerant temperature measuring device 12. By using the temperature measured by the above, it is possible to reliably detect a drainage failure and stop the progress of dehumidification.

  Further, the temperature at which the operation of the compressor 2 is stopped may be set to a predetermined temperature in accordance with the relationship between the load and the rotation speed of the compressor 2. For example, the drainage abnormality is determined earlier by operating in advance and setting a value lower than the lowest refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 and higher than the refrigerant condensing temperature as a predetermined temperature. Can do.

(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. The feature of the present embodiment is that when the refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 is lowered to a predetermined temperature, the rotational speed of the compressor 2 is lowered for a predetermined time. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  The compressor 2 operates at a first predetermined rotation speed r1 (for example, 90 rps) set in a relatively high rotation range. The refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 is set to t1 (for example, 110 ° C.), controlled within a predetermined range in conjunction with the operation of the compressor 2, and the rotation speed of the compressor 2 Is kept constant, the vertical fluctuation range is small and about 1 deg. The refrigerant condensing temperature measured by the second refrigerant temperature measuring device 12 is t3 (for example, 70 ° C.).

  In the operating section c, the refrigerant discharge temperature t1 measured by the first refrigerant temperature measuring device 10 is slightly lowered from t1 to t5. However, at this stage, it cannot be determined whether the first temperature measuring unit 8 is caused by contact with the condensed water accumulated in the drain pan 13 or due to a change in the heat pump cycle.

  Therefore, when the refrigerant discharge temperature decreases to a predetermined temperature (for example, t5), the rotation speed of the compressor 2 is decreased from the first predetermined rotation speed r1 to the second predetermined rotation speed r2 for a predetermined time in the section d. At this time, if the refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 becomes lower than a predetermined temperature (the refrigerant condensing temperature t4 measured by the second refrigerant temperature measuring device 12 in the present embodiment), the first The temperature measuring unit 8 can determine that the temperature has decreased due to contact with the condensed water accumulated in the drain pan 13, and the operation of the compressor 2 is stopped.

  While the compressor 2 is operating at the first predetermined rotational speed r1, the heat capacity flow rate due to the circulation of the refrigerant is large, and the refrigerant discharge temperature decreases from the predetermined temperature t1 to t5 due to contact with the condensed water. By reducing the rotation speed of the compressor 2 from the first predetermined rotation speed r1 to the second predetermined rotation speed r2, the detection accuracy can be increased and the measurement temperature can be greatly decreased. The occurrence of poor drainage can be accurately and accurately detected.

  As described above, in the present embodiment, when the temperature measured by the first refrigerant temperature measuring device 10 decreases to a predetermined temperature, the rotational speed of the compressor 2 is decreased for a predetermined time. When the temperature measured by the first refrigerant temperature measuring device 10 during operation is decreased to a predetermined temperature, the measured temperature can be greatly decreased by increasing the sensitivity by decreasing the rotational speed of the compressor 2 for a predetermined time. In addition, the water level abnormality in the drain pan 13 can be detected accurately and accurately, and the operation of reducing the rotational speed of the compressor 2 can be reduced to stabilize the operation of the compressor 2.

  Further, when the refrigerant discharge temperature measured by the first refrigerant temperature measuring device 10 decreases to a predetermined temperature (for example, t4) lower than the temperature (for example, t5) for decreasing the rotation speed of the compressor 2, the compressor 2 The operation is stopped, the drainage abnormality of the condensed water is accurately detected, the progress of dehumidification can be stopped, and the overflow of the condensed water can be prevented.

(Embodiment 3)
FIG. 6: is principal part sectional drawing of the clothes dryer provided with the dehumidification warming apparatus in the 3rd Embodiment of this 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 rotation shaft of the drum 23 is inclined upward.

  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.

  Further, 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 to the inner peripheral side surface of the drum 23 at the time of 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 16 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 15 and flows through the wind circuit 17 of the dehumidifying and warming device.

  The air sent from the air inlet 15 to the dehumidifying and warming device is cooled and dehumidified by the heat absorber 5, then enters the radiator 3 and is heated to become high-temperature and low-humidity air from the air outlet 16 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.

(Embodiment 4)
In the fourth embodiment of the present invention, a clothes dryer is provided with a speed drying course, and the control device 9 intermittently reduces the rotation speed of the compressor 2 when setting the speed drying course, and the first refrigerant temperature When the temperature measured by the measuring device 10 decreases to a predetermined temperature, the operation of the compressor 2 is stopped. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  The speed drying course is used when drying in a shorter time than when a normal drying course is set, and the compressor 2 is operated at a high rotational speed such as 100 rps. When R134a is used as the refrigerant, the refrigerant condensing temperature in the radiator 3 is higher than the normal drying course and reaches 70 ° C.

  On the other hand, the refrigerant evaporation temperature in the heat absorber 5 is lower than the normal drying course and becomes 15 ° C. At this time, since the evaporation temperature is low, the surface temperature of the fins provided in the heat absorber 5 is also reduced, and the amount of condensed water is increased. Therefore, at the time of setting the speed drying course, the rotation speed of the compressor 2 is decreased more frequently than the normal drying course, for example, about once every 10 minutes.

  With the above configuration, since the compressor 2 is operated at a high speed rotation in the speed drying course, the heat capacity flow rate of the refrigerant is increased, and the temperature drop when contacting the condensed water is reduced. By intermittently reducing it, it is possible to accurately detect a drainage abnormality with high accuracy. Thereby, when the temperature measured with the 1st refrigerant | coolant temperature measuring apparatus 10 falls to predetermined | prescribed temperature, it can be judged that the waste_water | drain defect has occurred, and overflow can be prevented by stopping the compressor 2. FIG.

  As another example in which a speed drying course is provided in the clothes dryer, when the temperature measured by the first refrigerant temperature measuring device 10 at the time of setting the speed drying course decreases to a predetermined temperature, the rotation speed of the compressor 2 is changed. The operation of the compressor 2 is stopped when the temperature is lowered for a predetermined time and when the rotational speed of the compressor 2 is lowered to a predetermined temperature lower than the temperature at which the rotational speed of the compressor 2 is lowered.

  As a result, it is possible to detect the abnormality of drainage accurately and accurately by increasing the sensitivity, and to reduce the operation of reducing the rotational speed of the compressor 2 to stabilize the operation of the compressor 2 and to perform the drying operation. It can be done efficiently.

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

  As described above, the dehumidifying and warming device according to the present invention can accurately detect the dehumidifying water drainage abnormality with a simple configuration and can accurately detect the dehumidifying and warming device and the clothes dryer. Useful as.

DESCRIPTION OF SYMBOLS 2 Compressor 3 Radiator 4 Throttling means 5 Heat absorber 6 Piping 7 Heat pump apparatus 8 1st temperature measurement part 9 Control apparatus 10 1st refrigerant | coolant temperature measurement apparatus 11 2nd temperature measurement part 12 2nd refrigerant | coolant temperature measurement apparatus 13 Drain pan 15 Air inlet 16 Air outlet

Claims (8)

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 The first refrigerant temperature measuring device which measures the temperature of the refrigerant by the drain pan which receives the dew condensation water generated by heat exchange with the air in the cooler, and the first temperature measuring unit provided in the pipe connecting the compressor and the radiator And a second refrigerant temperature measuring device for measuring the condensation temperature in the radiator by a second temperature measuring unit, and the operation of the compressor based on temperature information measured by the first and second refrigerant temperature measuring devices. And a dehumidifying and warming device that installs the first temperature measuring unit in the drain pan and intermittently reduces the rotational speed of the compressor. Location. The dehumidifying and warming device according to claim 1, wherein the control device stops the operation of the compressor when the temperature measured by the first refrigerant temperature measuring device decreases to a predetermined temperature. 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 The first refrigerant temperature measuring device which measures the temperature of the refrigerant by the drain pan which receives the dew condensation water generated by heat exchange with the air in the cooler, and the first temperature measuring unit provided in the pipe connecting the compressor and the radiator And a second refrigerant temperature measuring device for measuring the condensation temperature in the radiator by a second temperature measuring unit, and the operation of the compressor based on temperature information measured by the first and second refrigerant temperature measuring devices. A control device that controls the first temperature measuring unit is installed in the drain pan, and the control device is configured such that the temperature measured by the first refrigerant temperature measuring device is low to a predetermined temperature. Then, the rotational speed of the compressor and to reduce the predetermined time dehumidification warming device. 4. The control device according to claim 3, wherein the controller stops the operation of the compressor when the temperature measured by the first refrigerant temperature measuring device decreases to a predetermined temperature lower than a temperature at which the rotation speed of the compressor is decreased. Dehumidifying and heating device. The controller is configured to stop the operation of the compressor when the temperature measured by the first refrigerant temperature measuring device decreases to the temperature measured by the second refrigerant temperature measuring device. Dehumidifying and heating device according to item. The clothes dryer provided with the dehumidification warming apparatus of any one of Claims 1-5. A speed drying course is provided, and the control device intermittently lowers the rotational speed of the compressor when setting the speed drying course, and the compression is performed when the temperature measured by the first refrigerant temperature measuring device falls to a predetermined temperature. The clothes dryer according to claim 6, wherein the operation of the machine is stopped. A speed drying course is provided, and when the temperature measured by the first refrigerant temperature measuring device is reduced to a predetermined temperature when the speed drying course is set, the control device reduces the rotation speed of the compressor for a predetermined time and the compression The clothes dryer according to claim 6, wherein the operation of the compressor is stopped when the temperature decreases to a predetermined temperature lower than a temperature at which the rotation speed of the compressor is decreased due to a decrease in the rotation speed of the machine.