JP4692178B2 - Clothes dryer - Google Patents

Description

  The present invention relates to a clothes dryer used in a general household and a clothes dryer installed in a clothes dryer that performs only drying.

  Conventionally, as this type of clothes drying apparatus, there are one using a heater as a heat source and one using a heat pump apparatus as a heat source (see, for example, Patent Document 1).

  Hereinafter, a washing / drying machine equipped with the conventional clothes drying apparatus disclosed in Patent Document 1 will be described with reference to FIG.

  FIG. 5 is a side sectional view of the conventional washing and drying machine described in Patent Document 1.

  In FIG. 5, the washing / drying machine 1 has a casing 2, a door 12 for attaching and removing clothes 6 is attached to the center of the casing 2, and a rotating drum 3 is accommodated therein. In a predetermined part of the rotating drum 3, a beater 5 for lifting and dropping the clothes 6 with the rotation of the rotating drum 3 and a number of punching holes 4 through which washing water 7 and circulating air 9 for drying are opened and closed are opened. is there. The shaft 11 of the rotating drum 3 receives power for rotation from a driving motor (not shown).

Further, the rear surface of the rotating drum 3 in the casing 2 is partitioned by a partition wall 22 except for the air inlet 24 and the air outlet 23, and ducts 10 and 13 through which the circulating air 9 passes are formed. The lower part of the front surface of the partition wall 22 constitutes a washing tub 14, and the lower part of the rotating drum 3 faces the portion of the washing tub 14. The air ducts 10 and 13 include a compressor 19 and a condenser (condenser).
18, a fan 17, an expansion valve 20, an evaporator (evaporator) 15 and the like are built in, and a so-called heat pump cycle is formed. A part of the condenser 18 is extended to the outer back surface of the casing 2 to form a radiator 16. 21 is a drain drain pipe for draining the dew condensation water generated in the evaporator 15, and 8 is a laundry drain pipe for draining the washing water.

  Next, each process and operation of the conventional washing / drying machine will be described.

  In the washing and rinsing process, the door 12 is opened, the garment 6 and an appropriate amount of detergent are put in, the door 12 is closed, and the following processes are executed.

  A specified amount of water 7 is supplied to the washing tub 14 up to the position of the water level A by a water supply valve (not shown). The rotating drum 3 rotates continuously or intermittently at the programmed number of rotations to perform cleaning. During this time, the garment 6 is lifted and dropped by the beater 5. After the washing is finished, the dirty washing water is drained out of the machine from the washing drain pipe 8 of the washing tub 14. Subsequently, the rinsing process is performed in the same process. Rinsing water is also drained out of the machine from the washing drain pipe 8 as washing drain.

  In the dehydration step, the rotating drum 3 rotates at a programmed number of rotations to dehydrate moisture in the clothing 6. The dewatered water is also drained out of the machine from the laundry drainage pipe 8 as laundry drainage. In the drying process, the compressor 19, the fan 17, and the rotating drum 3 are operated, and the circulating air 9 circulates inside the ducts 10, 13 and the rotating drum 3.

The water vapor evaporated from the clothing 6 is brought into contact with the evaporator 15 through the air outlet 23 and the duct 10 together with the circulating air 9, and is cooled and dehumidified as condensed water (condensed water). The dehumidified circulating air 9 is sent to the condenser 18 by the fan 17, heated there to become hot air, flows into the rotary drum 3 through the duct 13 and the air inlet 24, and evaporates moisture from the clothing 6 again. Let The condensed water dehumidified by the evaporator 15 is drained out of the apparatus through a drain drain pipe 21. During this time, the rotating drum 3 rotates continuously or intermittently at a preset number of rotations as in the washing process. In the above, the process which performs continuously from washing to drying was explained.
Japanese Examined Patent Publication No. 6-75628

  However, in the configuration of the conventional clothes drying apparatus, there is not particularly provided a detection means when the refrigerant sealed in the heat pump cycle leaks to the outside, and when the refrigerant leaks, the pressure of the entire refrigerant circuit is increased. As a result of a decrease or a shortage of the refrigerant circulation amount, the capability is reduced, and an excessive load is applied to the compressor 19 to shorten the life of the device, and the lubricant for the motor in the compressor 19 together with the refrigerant Leaks and damages the compressor 19.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a clothes drying apparatus that can reliably detect leakage of a refrigerant and protect a compressor.

In order to solve the above-described conventional problems, the clothes drying apparatus of the present invention is reduced in pressure by a compressor, a radiator that radiates heat of the compressed refrigerant, a throttle means that reduces the pressure of the high-pressure refrigerant, and the pressure is reduced. A heat pump device connected by a pipe line so that the refrigerant circulates, a heat absorber that takes heat away from the surroundings with the refrigerant, a drying chamber for storing clothing, and a compressor rotation for detecting the rotation speed of the compressor A number detecting means, a blowing means for blowing drying air, a circulation air path for guiding the drying air to the heat absorber through the radiator and the drying cabinet, and returning the heat to the radiator again, and heating by the radiator temperature detection means for detecting the temperature of the drying air that is, wherein when the compressor is higher than a predetermined rotational speed, continues the temperature the temperature detected by the detection means the state is below a predetermined temperature for a predetermined time If, so as to control stopping the compressor When the refrigerant leaks from the temperature of the drying air or the temperature of the refrigerant correlated therewith and the rotation speed of the compressor, the compressor is stopped by the control means. Even if it leaks, the clothes drying apparatus which can protect a compressor is realizable.

The clothing drying apparatus of the present invention can accurately detect the leakage of refrigerant with little influence by the state of clothing and atmosphere by continuing the state where the temperature of the drying air is equal to or lower than the predetermined temperature for a predetermined time, Even when the refrigerant leaks, a clothes drying apparatus that can protect the compressor can be realized.

According to a first aspect of the present invention, there is provided a compressor, a radiator that radiates heat of the compressed refrigerant, a throttle means that depressurizes the pressure of the high-pressure refrigerant, and a heat absorber that draws heat from the surroundings by the reduced-pressure refrigerant. A heat pump device configured to be connected by a pipe line so that the refrigerant circulates, a drying chamber for storing clothes, a compressor rotation speed detecting means for detecting the rotation speed of the compressor, and a blower for blowing drying air temperature detected means, and air circulation duct for returning the drying air again radiator lead to the heat sink through the drying chamber and the radiator, the temperature of the drying air heated by the radiator When the detection means and the compressor are at a predetermined number of revolutions or more, if the temperature detected by the temperature detection means is below a predetermined temperature and continues for a predetermined time , the compressor is controlled to stop. control means for those were provided, and the temperature of the drying air When it is detected that the refrigerant has leaked because the temperature of the relevant refrigerant and the rotational speed of the compressor satisfy a predetermined condition for a predetermined time, the control means stops the compressor, It is possible to realize a clothes drying apparatus that can accurately detect a refrigerant leak with little influence by the state of the atmosphere and can protect the compressor even when the refrigerant leaks.

According to a second aspect of the invention, in particular, the clothes drying apparatus of the first aspect of the invention comprises a time measuring means for measuring time, and the control means compresses after a predetermined time has elapsed since the clothes drying apparatus started to operate. When the machine is at a predetermined number of revolutions or more and the temperature detected by the temperature detection means remains below the predetermined temperature for a predetermined period of time , the compressor is stopped and the clothes drying device starts operating. After a predetermined time has elapsed, when it is detected that the refrigerant has leaked from the temperature of the drying air or the temperature of the refrigerant correlated therewith and the rotation speed of the compressor, the control means stops the compressor, In addition, it is possible to realize a clothes drying apparatus that can accurately detect a refrigerant leak and that can protect the compressor even when the refrigerant leaks .

In particular, the third aspect of the invention includes compressor inflow current detection means for detecting a current value flowing into the compressor of the first aspect of the invention, and the control means is configured such that when the compressor has a predetermined rotational speed or more, When the current value flowing into the compressor falls below a predetermined value and the temperature detected by the temperature detection means continues below the predetermined temperature for a predetermined time , the compressor is stopped and compressed When it is detected that the refrigerant has leaked from the amount of current flowing into the machine, the temperature of the drying air or the temperature of the refrigerant correlated therewith and the rotation speed of the compressor, the refrigerant is leaked by stopping the compressor by the control means. In this case, it is possible to realize a clothes drying apparatus that can protect the compressor.

According to a fourth aspect of the invention, in particular, the clothes drying apparatus of the third aspect of the invention comprises a time measuring means for measuring time, and the control means compresses after a predetermined time has elapsed since the clothes drying apparatus started operating. When the machine has a predetermined rotation speed or higher, the current value flowing into the compressor is lower than a predetermined value and the temperature detected by the temperature detecting means is lower than the predetermined temperature for a predetermined time. The compressor is stopped, and the amount of current flowing into the compressor after a lapse of a predetermined time from the start of the operation of the clothes drying apparatus and the temperature of the drying air or the temperature of the refrigerant correlated therewith and the compressor When it is detected from the number of revolutions that the refrigerant has leaked, the compressor is stopped by the control means, so that it is possible to accurately detect the refrigerant leak with little influence from clothing and atmosphere conditions, and even if the refrigerant leaks, the compressor Of protecting It is possible to realize Kill cloth dryer.

According to a fifth aspect of the invention, in particular, the control means of the third or fourth aspect of the invention is characterized in that the compressor is at a predetermined rotational speed or higher, the current value flowing into the compressor is lower than a predetermined value, and the temperature is detected. the state the temperature detected by the means is below a predetermined temperature MaTsugi continued at a given time, intended to stop the compressor, a temperature or a correlation of the current amount of drying air flowing into the compressor When it is detected that the refrigerant has leaked because the refrigerant temperature and the rotation speed of the compressor satisfy a predetermined condition for a predetermined period of time, the compressor is stopped by the control means so that the state of clothing and atmosphere Therefore, it is possible to realize a clothes drying apparatus that can detect refrigerant leakage with high accuracy and that can protect the compressor even when refrigerant leaks.

The sixth aspect of the invention includes, in particular, a rotational speed detection means for detecting the rotational speed of the blower means of the third invention, and the control means is configured such that when the compressor is at a predetermined rotational speed or more, the blower means is a predetermined speed. When the state where the value of the current flowing into the compressor is not more than a predetermined value and the temperature detected by the temperature detecting means is not more than a predetermined temperature continues for a predetermined time , the compressor is When it is detected that the refrigerant has leaked from the rotational speed of the blowing means, the amount of current flowing into the compressor, the temperature of the drying air, or the temperature of the refrigerant correlated therewith and the rotational speed of the compressor, the control means By stopping the compressor by this, it is possible to realize a clothes drying apparatus that can protect the compressor even when the refrigerant leaks.

According to a seventh aspect of the invention, in particular, the clothes drying apparatus of the sixth aspect of the invention comprises a time measuring means for measuring time, and the control means has passed a predetermined time or more after the clothes drying apparatus has started to operate, When the compressor has a predetermined rotation speed or higher, the blower means has a predetermined rotation speed or higher, the current value flowing into the compressor is not higher than a predetermined value, and the temperature detected by the temperature detection means is predetermined. When the temperature is below the temperature for a predetermined time , the compressor is stopped, and the rotation speed of the blowing means and the amount of current flowing into the compressor after a predetermined time has elapsed since the clothing drying apparatus started operating. When the refrigerant leaks from the temperature of the drying air or the temperature of the refrigerant correlated therewith and the rotational speed of the compressor, the compressor is stopped by the control means, so that the influence of the state of clothing and atmosphere is small. Accurate refrigerant leak detection With wear, it is possible to realize a clothes drying apparatus capable of protecting the compressor even if refrigerant leaks.

In the eighth aspect of the invention, in particular, the control means of the sixth or seventh aspect of the invention is such that the compressor has a predetermined rotation speed or higher, the blower means has a predetermined rotation speed or higher, and the current value flowing into the compressor is in less than a predetermined value, and the state temperature detected by the temperature detecting means is below a predetermined temperature MaTsugi continued at a given time, intended to stop the compressor, the speed and compressor air blowing means When it detects that the refrigerant has leaked because it continues for a predetermined period of time when the amount of current flowing in and the temperature of the drying air or the temperature of the refrigerant correlated therewith and the rotational speed of the compressor satisfy the predetermined condition, control is performed. By stopping the compressor by means, it is possible to accurately detect refrigerant leakage with little influence from clothing and atmosphere conditions, and to realize a clothing drying device that can protect the compressor even when refrigerant leaks Can do.

In the ninth aspect of the invention, in particular, with the temperature detection means of any one of the first to eighth aspects of the invention, the temperature of the drying air after passing through the radiator in the circulation air passage is detected. Since the temperature of the drying air can be directly detected, the accuracy of refrigerant leak detection is improved .

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

(Embodiment 1)
FIG. 1 is a perspective view of a washing / drying machine equipped with a clothes drying apparatus according to a first embodiment of the present invention as seen from the back, and FIG. 2 is a side sectional view of the washing / drying machine.

  In FIG. 1, a washing tub 26 is provided in a washing / drying machine main body 25 (hereinafter referred to as “main body 25”) of the washing / drying machine according to the present embodiment, and a motor 27 is attached. The washing tub 26 is attached to the main body 25 by being supported by suspensions 29 on both sides and an upper suspension 30.

  The main body 25 includes a compressor 35 that compresses the vaporized refrigerant, a radiator 36 that radiates heat of the compressed high-temperature and high-pressure refrigerant, an expansion valve for reducing the pressure of the high-pressure refrigerant, or a capillary tube. And a heat pump device constructed by connecting a throttling means 37 and a heat absorber 38, in which the reduced pressure and low pressure refrigerant removes heat from the surroundings, and connecting them by a conduit 39 so that the refrigerant circulates again to the compressor 35. 51.

  The air passage 40 is configured to communicate the heat absorber 38 as a dehumidifying means for cooling the drying air and the radiator 36 as a heating means for heating the drying air. The washing tub 26 and the air passage 40 are connected by flexible hoses 41 and 42. The air passage 40 is provided with air blowing means 43. A duct 44 that communicates the inside of the washing tub 26 and the flexible hose 41 is provided on the outer wall of the washing tub 26. As described above, a circulation air passage 53 through which dry air circulates is formed by the flexible hose 42, the washing tub 26 that houses the rotating drum 28 described later, the duct 44, the flexible hose 41, and the air passage 40. Yes. An arrow B indicates the flow of drying air in the duct 44 and the air passage 40.

  In FIG. 2, a rotating drum 28 serving as a drying cabinet for storing clothes 31 is directly connected to a shaft 27 a of a motor 27 and is rotatably mounted in the washing tub 26. A door 32 for loading clothes 31 is provided at a position corresponding to the front opening of the washing tub 26 and the rotary drum 28. A gap between the main body 25 and the washing tub 26 is substantially sealed by a bellows 33 and a door packing 34 so that air does not leak into the main body 25 or outside the machine. A plurality of holes 45 and openings 46 through which washing water and drying air enter and exit are provided on the side wall and bottom of the rotating drum 28. The opening 56 is provided on the inner wall of the washing tub 26 and communicates the air path between the washing tub 26 and the duct 44. An arrow C indicates the flow of drying air in the washing tub 26 and the rotary drum 28.

  The washing drainage channel 47 is a channel for draining wastewater during washing. Condensed water generated in the heat absorber 38 during drying is received in a water reservoir 67. One end of a condensation drainage channel 48 having a pump 68 is connected to the bottom 69 of the water reservoir 67, and the other end of the condensation drainage channel 48 and the washing drainage channel 47 are connected to one drainage pipe 49.

  The tip 50 of the drain pipe 49 is open to the atmosphere outside the machine. One drainage valve 60 is provided at the junction of the washing drainage channel 47 and the condensation drainage channel 48, and the drainage treatment means is constituted by the washing drainage channel 47, the condensation drainage channel 48, the drainage pipe 49, and the drainage valve 60. ing.

  Reference numeral 71 denotes a temperature detection means that is provided in the air passage 40 and detects the temperature of the drying air. Reference numeral 72 denotes compressor rotation speed detection means for detecting the rotation speed of the compressor 35. 73 is a control means for controlling the operation of the compressor 35, and 74 is a time measuring means for measuring time.

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

  In the washing process from washing, rinsing and dewatering, when water is stored, the drainage valve 60 closes the washing drainage channel 47 side and opens the condensation drainage channel 48 side, and then the water supply valve (not shown) opens the washing tub. Water is supplied to 26, and water is accumulated up to the position of the water level D in FIG.

  The rotating drum 28 rotates continuously or intermittently at a programmed number of rotations, and cleaning and rinsing are performed. During this time, the clothes 31 are lifted and dropped by the rotation of the rotary drum 28. When draining, the drainage valve 60 opens the washing drainage channel 47 side, the condensation drainage channel 48 side is closed, and the water in the washing tub 14 passes through the washing drainage channel 47 and the drainage valve 60 from the drainage pipe 49. Drained outside.

  In the drying step, the drainage valve 60 closes the washing drainage channel 47 side, the condensation drainage channel 48 side is opened, and the motor 27 that drives the compressor 35, the blowing means 43, and the rotary drum 28 is operated. By the operation of the blowing means 43, the drying air circulates through the inside of the washing tub 26, the duct 44, the flexible hose 41, the air path 40, and the flexible hose 42. The clothing 31 is agitated by a rotating drum 28 that rotates continuously or intermittently at a preset number of rotations.

  By the operation of the compressor 35, the refrigerant circulates in the pipe 39, and the heat of the high-temperature and high-pressure refrigerant is radiated by the radiator 36 to heat the drying air. The heated drying air is sent into the washing tub 26 as shown by an arrow C in FIG. 2, passes through the opening 46 provided in the bottom surface of the rotating drum 28, hits the clothing 31, and removes moisture from the clothing 31 The air is then taken as humid air, passes through a large number of holes 45 provided in the side wall of the rotary drum 28, and is sent to the duct 44 through the opening 56 of the washing tub 26. The drying air that has passed through the duct 44 passes through the flexible hose 41 and is dehumidified by a heat absorber 38 as a dehumidifying means provided in the air passage 40 as indicated by an arrow B. The dehumidified drying air is sent again to the radiator 36 by the blowing means 43 and heated.

  Here, when the refrigerant leaks from the heat pump device 51 for some reason, the heat exchange capacity decreases due to the decrease in the refrigerant amount. For this reason, even if the rotation speed of the compressor 35 detected by the compressor rotation speed detection means 72 is about the same as the normal time, the temperature of the drying air detected by the temperature detection means 71 is lower than the normal time. It becomes. Thereby, leakage of the refrigerant can be detected by detecting the rotation speed of the compressor 35 and the temperature of the drying air.

  Specifically, when the standard amount of refrigerant is sealed, the control means 73 has one or more relationships with the value of the temperature Td of the drying air when the compressor 35 is operated at the rotational speed Rn. The predetermined temperature Tth is set so that the temperature of the drying air detected by the temperature detecting means 71 is lower by a predetermined amount ΔTd than Td when the rotation speed is equal to or higher than Rn during operation of the compressor 35. If it becomes below, it will be judged as a refrigerant | coolant leak and the compressor 35 will be stopped by the control means 73. FIG. Thus, by detecting that the refrigerant has leaked and stopping the compressor 35, the compressor 35 can be protected even when the refrigerant has leaked.

  As described above, according to the present embodiment, the refrigerant leakage is detected from the values detected by the temperature detection means 71 and the compressor rotation speed detection means 72, and the compressor 35 is stopped by the control means 73. It is possible to provide a clothes drying apparatus that can reliably protect the compressor 35 even when the refrigerant leaks.

In the above embodiment, the temperature detecting means 71 is installed in the air passage 40 to directly detect the temperature of the drying air. However, the temperature of the refrigerant passing through the pipe 39 and the temperature of the drying air are not detected. Since there is a correlation between the temperatures, the same effect can be obtained even if the temperature detecting means 71 is installed on the pipeline 39 of the radiator 36, and the same effect can be obtained if it is installed on the pipeline 39 of other portions. Is obtained.

  In the above embodiment, when a predetermined condition is satisfied, it is immediately determined that the refrigerant leaks. However, the timer 74 causes the refrigerant to leak after a predetermined time has elapsed since the clothing drying apparatus started operating. If it judges, the influence by the state of clothing or atmosphere can be reduced, and a refrigerant | coolant leak can be detected more accurately.

  In addition, the timer 74 determines a specific operation of the clothes drying apparatus, for example, a drying start instruction by a drying start instruction means (not shown), activation of the compressor 35, and the like, and a refrigerant leak is determined after a predetermined time has elapsed from the start of the operation. Even if it does, the same effect can be acquired.

  Further, even if the time keeping means 74 determines that the refrigerant leaks when the condition satisfying the predetermined condition for judging the refrigerant leak continues for a predetermined time or more, the influence of the clothing or atmosphere state is reduced. It is possible to detect refrigerant leakage with higher accuracy.

  Moreover, in the said embodiment, although the tube type heat exchanger with a plate fin is shown as a heat exchanger which forms the heat radiator 36 and the heat absorber 38, the form is not specifically limited.

  In the present embodiment, the washing / drying machine has been described as an example, but it goes without saying that the same effect can be obtained even in a clothes drying machine that only dries clothes.

(Embodiment 2)
FIG. 3 is a side sectional view of a washing / drying machine equipped with a clothes drying apparatus according to the second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the present embodiment, as shown in FIG. 3, a compressor inflow current detecting means 75 for detecting a current value flowing into the compressor 35 is provided. Considering the relationship between the temperature of the drying air and the number of rotations of the compressor 35, the temperature detecting means 71 in a specific environment such as when the outside air temperature is extremely low or when the temperature of the drying clothing is extremely low. In some cases, the temperature of the drying air detected by the above is lower than Td by ΔTd or more. In this case, paying attention to the value of the current flowing into the compressor 35, if the amount of refrigerant decreases, the load at the time of compression decreases, so the current value decreases.

  Specifically, when a standard amount of refrigerant is sealed, the relationship between the value of the temperature Td of the drying air and the current value flowing into the compressor 35 when the compressor 35 is operated at the rotation speed Rn. One or more relations of Ic values are stored in the control means 73, and the temperature of the drying air detected by the temperature detection means 71 is determined from Td when the rotational speed is Rn or more during the operation of the compressor 35. If the current value detected by the compressor inflow current detecting means 75 becomes equal to or lower than a predetermined current value Ith smaller than the predetermined amount ΔIc by a predetermined amount ΔTd, the refrigerant is It is determined that there is a leak, and the compressor 35 is stopped by the control means 73.

  Thus, by detecting that the refrigerant has leaked and stopping the compressor 35, the compressor 35 can be reliably protected even when the refrigerant has leaked.

  As described above, according to the present embodiment, the refrigerant leakage is detected from the values detected by the compressor inflow current detecting means 75, the temperature detecting means 71, and the compressor rotation speed detecting means 72, and the control means 73 compresses the refrigerant. By stopping the machine 35, it is possible to realize a clothes drying apparatus that can protect the compressor 35 even when the refrigerant leaks.

  In the above embodiment, when a predetermined condition is satisfied, it is immediately determined that the refrigerant has leaked. However, the time measuring means 74 determines that the refrigerant has leaked after a predetermined time has elapsed since the clothing drying apparatus started operating. By doing so, it is possible to reduce the influence of clothing and atmosphere conditions, and it is possible to detect refrigerant leakage with higher accuracy.

  In addition, the timer 74 determines a specific operation of the clothes drying apparatus, for example, a drying start instruction by a drying start instruction means (not shown), activation of the compressor 35, and the like, and a refrigerant leak is determined after a predetermined time has elapsed from the start of the operation. Even if it does, the same effect can be acquired.

  In addition, if the time keeping means 74 determines that the refrigerant leaks when the condition satisfying the predetermined condition for determining that the refrigerant is leaking continues for a predetermined time or more, the influence of the state of clothing or atmosphere is reduced. The refrigerant leakage can be detected with higher accuracy.

  In the present embodiment, the laundry dryer has been described as an example, but the same effect can be obtained in a clothes dryer that performs only drying.

(Embodiment 3)
FIG. 4 is a side sectional view of a washing / drying machine equipped with the clothes drying apparatus according to the third embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same components as the washing dryer in the said 1st, 2nd embodiment, and detailed description is abbreviate | omitted.

  As shown in FIG. 4, the present embodiment is provided with a rotation speed detection means 76 that detects the rotation speed of the blower means 43, and whether the rotation speed of the blower means 43 is equal to or greater than the predetermined rotation speed, The leak is judged. Originally, the air blowing means 43 is controlled to operate at a predetermined rotational speed, and when the standard refrigerant amount is enclosed, the temperature Td of the drying air when the compressor 35 is operated at the rotational speed Rn. The relationship between the value and the value of the current value Ic flowing into the compressor 35 is also stored in the control unit 73 on the assumption that the blower unit 43 is operated at a predetermined rotational speed.

  For this reason, it is possible to improve the reliability of the determination by determining the refrigerant leakage only when the rotation speed of the air blowing means 43 is equal to or larger than the predetermined rotation speed by the rotation speed detection means 76.

  As described above, according to the present embodiment, refrigerant leakage is detected from the values detected by the rotation speed detection means 76, the compressor inflow current detection means 75, the temperature detection means 71, and the compressor rotation speed detection means 72. By stopping the compressor 35 by the control means 73, it is possible to realize a clothes drying apparatus that can protect the compressor 35 even when the refrigerant leaks.

  In the present embodiment, it is determined that the refrigerant leaks immediately when a predetermined condition is satisfied. However, as in the first and second embodiments, the time-measurement means 74 is used to dry the clothes. The refrigerant leak is judged after a predetermined time has elapsed since the start of operation of the apparatus, or a specific operation of the clothes drying apparatus, for example, a drying start instruction by a drying start instruction means (not shown), starting of the compressor 35, etc. If the refrigerant leak is determined after a predetermined time has elapsed from the start of the operation, or if a condition satisfying a predetermined condition for determining the refrigerant leak continues for a predetermined time or more, it is determined that the refrigerant leaks. The influence of the state of clothing and atmosphere can be reduced, and refrigerant leakage can be detected with higher accuracy.

  In the present embodiment, the washing / drying machine is described as an example, but the same effect can be obtained in a clothes drying machine that performs only drying.

  As described above, the clothes drying apparatus according to the present invention can reliably detect the leakage of the refrigerant and protect the compressor, and performs washing and drying used in a general household in the same tank. It can be widely applied to washing machines with a drying function and clothes dryers that only dry.

The perspective view which looked at the washing-drying machine carrying the clothing drying apparatus in the 1st Embodiment of this invention from the back Side sectional view of the washer / dryer Side sectional view of a washing and drying machine equipped with a clothes drying apparatus according to a second embodiment of the present invention Side sectional view of a washing and drying machine equipped with a clothes drying apparatus according to a third embodiment of the present invention Side sectional view of a washing dryer equipped with a conventional clothes dryer

26 Laundry tub 28 Rotating drum (dryer)
31 Clothing 35 Compressor 36 Radiator 37 Throttling means 38 Heat absorber 39 Pipe line 40 Air path 43 Blower means 51 Heat pump device 53 Circulating air path 71 Temperature detection means 72 Compressor rotation speed detection means 73 Control means 75 Compressor inflow current detection Means 76 Rotational speed detection means

Claims (9)

The refrigerant circulates between the compressor and the radiator that radiates the heat of the compressed refrigerant, the throttle means that depressurizes the pressure of the high-pressure refrigerant, and the heat absorber that draws heat from the surroundings with the reduced-pressure and low-pressure refrigerant. A heat pump device connected by a pipe line, a drying cabinet for storing clothes, a compressor rotation speed detection means for detecting the rotation speed of the compressor, a blower means for blowing drying air, and the drying temperature detection means for detecting the air circulation duct for returning again to the radiator leads air to the heat absorber through the drying chamber and the radiator, the temperature of the drying air heated by the radiator, the compression Control means is provided for controlling the compressor to stop when the temperature detected by the temperature detecting means is below the predetermined temperature when the machine is at a predetermined rotational speed or more and continues for a predetermined time . Clothing drying device. A time measuring means for measuring time, and the control means is a temperature detected by the temperature detecting means when a predetermined time or more has elapsed since the clothing drying apparatus started operation and the compressor is at a predetermined rotation speed or more. The clothes drying apparatus according to claim 1, wherein the compressor is stopped when a state where the temperature is equal to or lower than a predetermined temperature continues for a predetermined time . A compressor inflow current detecting means for detecting a current value flowing into the compressor is provided, and the control means has a current value flowing into the compressor equal to or lower than a predetermined value when the compressor has a predetermined rotation speed or higher. The clothes drying apparatus according to claim 1 , wherein the compressor is stopped when a state where the temperature detected by the temperature detecting means is lower than a predetermined temperature continues for a predetermined time . Time measuring means for measuring time, and the control means is a current value that flows into the compressor when the predetermined time has elapsed since the clothing drying apparatus started operation and the compressor is at a predetermined rotational speed or more. 4. The clothes drying apparatus according to claim 3 , wherein the compressor is stopped when a state in which the temperature is equal to or lower than a predetermined value and the temperature detected by the temperature detection means continues for a predetermined time . The control means is in a state where the compressor is at a predetermined rotational speed or higher, the current value flowing into the compressor is lower than the predetermined value, and the temperature detected by the temperature detecting means is lower than the predetermined temperature. The clothes drying apparatus according to claim 3 or 4 , wherein the compressor is stopped when the time elapses . A rotation number detection means for detecting the rotation number of the blower means is provided, and the control means is configured such that the compressor rotates at a predetermined rotation
When the number is more than a certain number, the state where the air blowing means is equal to or higher than a predetermined rotational speed, the current value flowing into the compressor is equal to or lower than a predetermined value, and the temperature detected by the temperature detecting means is equal to or lower than the predetermined temperature. The clothes drying apparatus according to claim 3 , wherein the compressor is stopped after a predetermined time has elapsed . A time measuring means for measuring time, and the control means is configured such that when a predetermined time or more has elapsed since the clothing drying apparatus started operation and the compressor is at a predetermined number of revolutions or more, the air blowing means is rotated at a predetermined speed. The compressor is stopped when the state where the current value flowing into the compressor is not more than a predetermined value and the temperature detected by the temperature detecting means is not more than a predetermined temperature continues for a predetermined time. The clothing drying apparatus according to claim 6 . The control means is configured such that the compressor is at a predetermined rotation speed or higher, the blower means is at a predetermined rotation speed or higher, the current value flowing into the compressor is lower than a predetermined value, and the temperature detected by the temperature detection means is The clothes drying apparatus according to claim 6 or 7 , wherein the compressor is stopped when a state of a predetermined temperature or lower continues for a predetermined time . The clothes drying apparatus according to any one of claims 1 to 8 , wherein the temperature detecting means detects the temperature of the drying air after passing through the radiator in the circulation air passage .