JP2021142089A - Clothes dryer - Google Patents

Abstract

To provide a clothes dryer in which ignition of a combustible refrigerant can be prevented by separating the combustible refrigerant from an ignition source, even when the combustible refrigerant leaks from a heat pump device.SOLUTION: A clothes dryer comprises: a rotary tub 4 provided in a housing 2, storing laundry and rotating; a door 8 closing an opening 2a of the housing 2; a lock mechanism 30 locking a door so that the door 8 is not opened; an air blowing device 21 circulating the air and a heat pump device dehumidifying the circulating air and heating it, which are provided in an air passage 19 provided so that the air in the rotary tub 4 circulates; a refrigerant leakage detection unit 31 detecting the leakage of the refrigerant included in the heat pump device; and a control unit 35 executing a drying operation. The heat pump device has a combustible refrigerant in a pipe conduit, and when the leakage of the combustible refrigerant is detected by the refrigerant leakage detection unit 31, the control unit 35 actuates the lock mechanism 30 so that the door 8 does not open.SELECTED DRAWING: Figure 1

Description

The present invention relates to a clothes dryer that dries clothes and the like.

There is a method of mounting a heat pump device as a means for improving the drying performance of a clothes dryer and a washer / dryer having a washing function. Patent Document 1 discloses a drum-type washer-dryer equipped with a heat pump device and having a function of a clothes dryer. This drum-type washer-dryer includes a housing, an outer tub provided in the housing, a bottomed tubular drum provided in the outer tub for accommodating laundry, a motor for rotating the drum, and an outer tub. A heat pump device including a circulation air passage provided on the outside of the outer tank so that the inner air circulates, a heat pump device provided in the circulation air passage to generate drying air, and a blower for circulating the drying air. Has a compressor, a radiator, a drawing means, a heat absorber, and a refrigerant flowing in the pipeline, which are connected by a pipeline, and are arranged above the outer tank.

Japanese Unexamined Patent Publication No. 2010-000106

Conventionally, an HFC-based refrigerant is used in a heat pump device mounted on a clothes dryer. However, in recent years, from the viewpoint of preventing global warming, the shift to natural refrigerants and HFO-based refrigerants having a small global warming potential has been progressing. Natural refrigerants include, for example, propane and butane, which are flammable. Further, HFO-1234yf, which is an HFO-based refrigerant, is slightly flammable. In other words, if these flammable refrigerants leak from the heat pump device and leak out of the housing, the flammable refrigerants may ignite if there is an ignition source such as a device that uses fire at the location where the clothes dryer is installed. Has the problem of being.

The present disclosure provides a clothes dryer capable of preventing ignition by isolating the flammable refrigerant from an ignition source even if the flammable refrigerant leaks from the heat pump device.

The clothes dryer in the present disclosure includes a housing, a rotary tub provided in the housing for accommodating and rotating laundry, a door for closing an opening of the housing in which the laundry is taken in and out, and the door. A lock mechanism for preventing the air from opening, an air passage provided for circulating the air in the rotary tank, a blower provided in the air passage for circulating the air, and dehumidifying the circulating air. The heat pump device includes a heat pump device for heating, a refrigerant leakage detection unit for detecting the leakage of the refrigerant contained in the heat pump device, and a control unit for executing a drying operation. The heat pump device has a flammable refrigerant in the pipeline. The control unit is configured to operate the lock mechanism so that the door does not open when the refrigerant leakage detection unit detects the leakage of the flammable refrigerant.

The clothes dryer in the present disclosure locks the flammable refrigerant in the air passage by operating a lock mechanism to lock the door so that the door does not open when the refrigerant leak detection unit detects the leakage of the flammable refrigerant. Can be done. Therefore, the flammable refrigerant can be isolated from the ignition source outside the housing, the flammable refrigerant can be prevented from igniting, and the safety can be enhanced.

Configuration diagram showing the inside of the drum type washer-dryer according to the first embodiment System system diagram of the drum type washer / dryer according to the first embodiment Side view of the heat pump device of the drum type clothes dryer according to the first embodiment. Block configuration diagram of the drum type clothes dryer according to the first embodiment

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters or duplicate explanations for substantially the same configuration may be omitted. This is to avoid unnecessarily redundant explanations below and to facilitate the understanding of those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 4. As an example of the clothes dryer, the drum type washer-dryer 100 will be described.

[1-1. composition]
[1-1-1. Clothes dryer configuration]
In FIG. 1, the left direction on the drawing will be described as the front direction of the drum type washer-dryer 100, and the right direction on the drawing will be described as the rear direction. The water tank 1 provided in the housing 2 is formed in a bottomed cylindrical shape that opens on the front side of the housing 2, and is elastically supported by a plurality of suspension mechanisms 3. The rotary tank 4 is formed in a bottomed cylindrical shape that opens to the front surface side, and is arranged in the water tank 1. The rotary tub 4 is rotatably provided around a rotary shaft 4a that is tilted forward at an angle θ (for example, 10 ° to 20 °) with respect to the horizontal, and accommodates laundry such as clothes.

A large number of holes 5 are provided on the peripheral side wall of the rotary tank 4 over the entire circumference. Baffles 6 for lifting the laundry in the rotation direction of the rotary tub 4 are provided at a plurality of places on the inner surface of the peripheral side wall of the rotary tub 4. A motor 7 for rotationally driving the rotary tank 4 is provided on the outside of the rear surface of the water tank 1. The motor 7 is composed of a brushless DC motor or the like, and is configured so that the rotation speed can be freely changed and forward / reverse rotation is possible by inverter control.

An opening 2a through which laundry is taken in and out is provided on the front surface of the housing 2. A hinged door 8 that opens and closes the opening 2a is provided. The opening of the water tank 1 and the opening of the rotary tank 4 face each other at the opening 2a. The opening of the water tank 1 is hermetically coupled to the opening 2a by a stretchable packing 9. The door 8 is provided with a transparent window so that the inside of the rotary tank 4 can be seen from the outside. When the door 8 is closed, the packing 9 comes into contact with the inner surface of the door 8, and the inside of the water tank 1 becomes a watertight and airtight space. As a result, water and air do not leak to the outside when the washing operation and the drying operation are performed.

Further, the opening 2a is provided with a lock mechanism 30 controlled by a control unit 35, which will be described later, to prevent the door 8 from opening.

A water supply path 10 and a water supply valve 11 connected to an external water pipe are provided in the upper part of the housing 2. The water supply path 10 is provided with a detergent case (not shown) in which a detergent, a softener, and the like are stored. When the water supply valve 11 is opened, tap water is supplied into the water tank 1, and detergent and the like are charged from the detergent case as needed.

Further, a drainage path 13 having a drainage valve 12 is provided at the lowest portion of the water tank 1. When the drain valve 12 is opened, the washing water in the water tank 1 is drained through the drainage path 13.

A heater 14 for heating the washing water is provided at the bottom of the water tank 1. The heater 14 is formed by, for example, bending a sheathed heater into a substantially U shape. The temperature of the washing water is detected by a water temperature detecting unit 15 such as a thermistor attached to the bottom of the water tank 1.

The amount of washing water stored in the water tank 1 is detected by the water level detecting unit 16. As the method for detecting the amount of water, the water level may be detected as shown in the present embodiment, or for example, the amount of water may be calculated from the flow rate or the amount of water may be calculated from the weight. good.

An air passage 19 provided so that the drying air circulates during the drying operation is provided above the outside of the water tank 1. An exhaust port 17 serving as an inlet of the air passage 19 is provided in the upper front side of the peripheral side wall of the water tank 1. Further, an air outlet 18 serving as an outlet of the air passage 19 is provided in the upper part of the rear surface of the water tank 1. That is, as shown in FIG. 2, the air passage 19 communicates with the exhaust port 17 and the air outlet 18 to form a circulation air passage via the water tank 1 and the rotary tank 4.

In FIG. 2, the white arrow A indicates the flow direction of the drying air flowing through the air passage 19. The air passage 19 includes a filter 20 that captures lint such as dust and lint generated from laundry from the inlet side (exhaust port 17 side), a heat absorber 22 and a radiator 23 of the heat pump device 41, and for drying. A blower 21 for circulating air is provided. The heat absorber 22 cools and dehumidifies the drying air flowing through the air passage 19. The radiator 23 heats the drying air dehumidified by the heat absorber 22.

The heat pump device 41 is configured by connecting a compressor 25, a radiator 23, a throttle portion 42, and a heat absorber 22 by a pipeline 24. As the refrigerant flowing through the pipeline 24, a flammable refrigerant (for example, R600a or R290) or a slightly flammable refrigerant (for example, R1234yf) is used, and a predetermined amount of the flammable refrigerant is sealed in the pipeline 24. The heat absorber 22 and the radiator 23 are composed of a fin tube heat exchanger. As shown in FIG. 3, the end portions of the heat absorber 22 and the radiator 23 are connected by an end plate 23a, and a space 23b is provided between the heat absorber 22 and the radiator 23.

In FIG. 2, the arrow B indicates the flow direction of the refrigerant flowing through the conduit 24 of the heat pump device 41. The refrigerant is pressurized by the compressor 25 to become a high-temperature and high-pressure gas refrigerant, which is discharged from the discharge port of the compressor 25 and sent to the radiator 23. In the radiator 23, this gas refrigerant is cooled by the drying air circulated by the blower 21 and condensed to become a low-temperature and high-pressure liquid refrigerant. This liquid refrigerant is decompressed by the throttle portion 42 to become a low-temperature and low-pressure liquid refrigerant, and flows into the heat absorber 22. In the heat absorber 22, the decompressed liquid refrigerant is heated by moist, high-temperature drying air, evaporates, becomes a low-temperature, low-pressure gas refrigerant, is sucked into the compressor 25, and is pressurized again.

The refrigerant temperature detection unit 32 is arranged at a predetermined position in the pipeline 24 through which the high-pressure refrigerant flows from the outlet of the compressor 25 to the throttle unit 42. The control unit 35 controls the heat pump device 41 by regarding the piping temperature detected by the refrigerant temperature detection unit 32 as the refrigerant temperature at that position.

Specifically, as shown in FIGS. 2 and 3, the first refrigerant temperature detection unit 32a is arranged in the pipeline 24 between the compressor 25 and the radiator 23. The first refrigerant temperature detection unit 32a is composed of a thermistor or the like, and detects the temperature of the refrigerant discharged from the compressor 25. Further, the second refrigerant temperature detection unit 32b is arranged in the pipeline between the inflow portion where the refrigerant flows into the radiator 23 and the outflow portion where the refrigerant flows out. The second refrigerant temperature detection unit 32b is composed of a thermistor or the like, and detects the condensation temperature of the refrigerant at a predetermined position of the pipe forming the radiator 23. The condensation temperature is the refrigerant saturation temperature at the pressure in the pipe, and the second refrigerant temperature detection unit 32b is arranged in a portion where the refrigerant flows in two layers of gas and liquid. That is, it is preferable that the radiator 23 is arranged near the center of the pipe length (the pipe length of one pass when the flow is divided into a plurality of passes).

In the air passage 19, an air temperature detecting unit 33 for detecting the temperature of the drying air is provided. Specifically, the first temperature detection unit 33a is provided in the vicinity of the air outlet 18. The first temperature detection unit 33a is composed of a thermistor or the like and detects the temperature of the drying air flowing into the rotary tank 4. Further, the second temperature detection unit 33b is provided in the vicinity of the exhaust port 17. The second temperature detection unit 33b is composed of a thermistor or the like, and detects the temperature of the drying air flowing out of the rotary tank 4. The control unit 35 can detect the dry state of the laundry in the rotary tub 4 from the temperature difference detected by the first temperature detection unit 33a and the second temperature detection unit 33b. That is, as the drying progresses, this temperature difference becomes smaller.

Further, in the air passage 19, as a refrigerant leakage detection unit 31, a refrigerant detector 31a that reacts when it comes into contact with the refrigerant sealed in the heat pump device 41 is installed. Since the refrigerant detector 31a directly detects the flammable refrigerant, it can detect the flammable refrigerant with high accuracy according to the sensitivity. The air passage 19 is configured so that when the refrigerant leaks from the heat pump device 41, the leaked refrigerant fills the air passage 19.

The control unit 35 that executes the washing operation and the drying operation is provided on the upper part of the front surface in the housing 2. Further, the operation display unit 36 is provided on the front surface of the housing 2. The operation display unit 36 is provided with an operation unit 36a for setting each operation and a display unit 36b for displaying the setting contents and the operation status.

In addition, a notification unit 39 for displaying, generating a sound, a buzzer sound, or the like is provided. The control unit 35 notifies the user by the notification unit 39, for example, when a problem occurs during operation. As an example of the malfunction, there is a refrigerant leak from the heat pump device 41. When the refrigerant leaks, the refrigerant detector 31a reacts with the refrigerant and outputs information to the control unit 35. The display unit 36b also functions as a notification unit 39, and the control unit 35 displays on the display unit 36b that there is a possibility that the refrigerant has leaked and words that encourage ventilation. Further, a buzzer 40 as a notification unit 39 is provided at the rear portion of the upper surface of the housing 2, and the control unit 35 issues an alarm by the buzzer 40. In this way, the control unit 35 visually or audibly informs the user of the occurrence of the abnormality.

[1-2. motion]
The operation and operation of the drum-type washer-dryer 100 configured as described above will be described below. The drum-type washer-dryer 100 can execute from washing to drying as a series of operations. The washing operation includes a washing step, a rinsing step, and a dehydration step, as in a general washing machine.

When performing the washing operation and the drying operation, the user opens the door 8 to store the laundry in the rotary tub 4. Then, the power switch of the operation unit 36a is turned on, and the operation course is selected by the various setting buttons. In addition, the time of each process is input as necessary, and the operation is started. The control unit 35 executes from washing to drying as a series of operations based on the set contents.

In the washing process, the control unit 35 detects the amount of laundry contained in the rotary tub 4 by the cloth amount detecting unit 37. Then, a predetermined amount of water is supplied according to the detected amount of laundry. When water and detergent are supplied into the water tank 1, the control unit 35 drives the motor 7 to rotate the rotary tank 4 at a predetermined speed (for example, 50 r / min), and performs washing by a stirring operation for a predetermined time. .. When the washing step is completed, the control unit 35 performs the rinsing step for a predetermined time. Then, after performing the rinsing step a predetermined number of times, a dehydration step of dehydrating the water contained in the laundry is performed, and the washing operation is completed.

When the washing operation is completed, the control unit 35 performs a drying operation. In the drying operation, the control unit 35 rotates the rotary tub 4 at a predetermined speed (for example, 50 rpm) and agitates the laundry in the rotary tub 4. Further, the heat pump device 41 and the blower device 21 are driven to circulate the drying air to the rotary tank 4 through the air passage 19.

In the heat pump device 41, when the compressor 25 is driven, the refrigerant is compressed, and the refrigerant flows through the pipeline 24 and circulates in the radiator 23, the throttle portion 42, the heat absorber 22, and the compressor 25. At this time, the radiator 23 becomes hot and the heat absorber 22 becomes cold. As a result, the drying air circulating in the air passage 19 is heated in contact with the fins provided in the radiator 23. Further, it is cooled and dehumidified in contact with the fins provided in the heat absorber 22.

In FIG. 2, the circulating drying air passes through the radiator 23 and is heated. Then, it passes through the blower 21 and is supplied from the blower port 18 to the rotary tank 4. The drying air comes into contact with the laundry that is agitated in the rotary tub 4 and removes water from the laundry to become moist air. Then, it is discharged from the exhaust port 17 to the air passage 19.

As the laundry dries, lint is generated from the laundry. The drying air discharged from the exhaust port 17 passes through the filter 20, and the lint contained in the air is captured by the filter 20.

The lint-removed drying air passes through the cold heat absorber 22. At this time, the drying air is dehumidified by being deprived of sensible heat and cooled, and deprived of latent heat. The dehumidified and dry drying air passes through the radiator 23 again to be heated, and further passes through the blower 21 to repeat circulation. The condensed water dehumidified by the heat absorber 22 is drained to the outside of the machine through the drainage path 13.

The control unit 35 detects the temperature of the drying air flowing into the rotary tank 4 by the first temperature detection unit 33a, and detects the temperature of the drying air flowing out of the rotary tank 4 by the second temperature detection unit 33b. From these temperature differences, the degree of dryness of the laundry in the rotary tub 4 is detected, and when it is determined that the degree of dryness has reached a predetermined degree, the drying step is terminated.

On the other hand, in the control of the heat pump device 41, the control unit 35 maintains the refrigerant temperature detected by the second refrigerant temperature detection unit 32b provided in the radiator 23 within a predetermined range (for example, 60 ° C. to 70 ° C.). The drive of the compressor 25 is controlled so as to be performed. Further, in order to ensure the insulation inside the compressor 25, the control unit 35 has a temperature of the refrigerant discharged from the compressor 25 detected by the first refrigerant temperature detection unit 32a of a predetermined temperature (for example, 100 ° C.) or less. The drive of the compressor 25 is controlled so as to be. This stabilizes the operation of the compressor 25 and realizes a safe and stable heat pump cycle.

By the way, if the refrigerant leaks from the heat pump device 41 during the drying operation, the refrigerant flows out to the air passage 19. At this time, the control unit 35 detects the refrigerant by the refrigerant detector 31a, which is the refrigerant leakage detection unit 31. When the control unit 35 detects the refrigerant, it determines that the flammable refrigerant has leaked from the heat pump device 41, immediately stops the drying operation, and operates the lock mechanism 30 to lock the door 8 so as not to open.

In addition, by sounding the buzzer 40, the user is notified of the occurrence of an abnormality, and the display unit 36b is displayed to indicate the possibility of refrigerant leakage or to display a display prompting ventilation. In addition to encouraging ventilation, the user is urged to take appropriate measures such as stopping or moving an ignition source (for example, a heater, a hair dryer, a stove, a lighting switch, etc.) outside the housing 2. You may. This makes it possible to inform the user of an appropriate response. The user who notices this notification can unlock the door 8 by performing a predetermined operation on the operation unit 36a after performing ventilation or the like according to the displayed contents.

Therefore, even if the flammable refrigerant leaks, by locking the door 8 so that it does not open, the user does not carelessly open the door 8 and the flammable refrigerant leaked into the air passage 19 is released. It can be contained in the housing. As a result, the flammable refrigerant can be isolated from the ignition source outside the housing 2, and the flammable refrigerant can be prevented from igniting. Then, ventilation is promoted, the flammable refrigerant is diluted, and appropriate measures are taken for the ignition source to eliminate the risk of ignition.

[1-3. Effect, etc.]
As described above, in the present embodiment, in the drum type washer-dryer 100, the housing 2, the rotary tub 4 provided in the housing 2 for accommodating and rotating the laundry, and the laundry are taken in and out. A door 8 that closes the opening 2a of the housing 2, a lock mechanism 30 that prevents the door 8 from opening, an air passage 19 provided so that air in the rotary tank 4 circulates, and an air passage 19 provided. , A blower 21 that circulates air, a heat pump device 41 that dehumidifies and heats the circulated air, a refrigerant leak detection unit 31 that detects leakage of the refrigerant contained in the heat pump device 41, and a control unit 35 that executes a drying operation. And. The heat pump device 41 has a flammable refrigerant in the pipeline 24. The control unit 35 is configured to operate the lock mechanism 30 so that the door 8 does not open when the refrigerant leakage detection unit 31 detects the leakage of the refrigerant.

As a result, when the control unit 35 detects the leakage of the refrigerant, it determines that the flammable refrigerant has leaked from the heat pump device 41, and can lock the door 8 so that it does not open. Therefore, the flammable refrigerant can be enclosed in the housing 2 and isolated from the ignition source outside the housing 2, preventing the flammable refrigerant from igniting and improving safety.

As in the present embodiment, the drum-type washer-dryer 100 includes a refrigerant detector 31a as a refrigerant leakage detection unit 31 that detects a flammable refrigerant disposed and sealed at a predetermined position in the air passage 19. It may be composed of.

As a result, the flammable refrigerant leaked from the heat pump device 41 can be directly and accurately detected.

Further, as in the present embodiment, the drum type washer-dryer 100 may include a notification unit 39 in which the control unit 35 notifies by a predetermined method when the refrigerant leakage detection unit 31 detects the refrigerant leakage. ..

As a result, it is possible to notify the user of the occurrence of an abnormality by sound or voice such as a buzzer. In addition, it is possible to notify the user of an appropriate response by displaying that there is a possibility that a refrigerant leak has occurred or that ventilation is promoted.

(Other embodiments)
As described above, the first embodiment has been described as an example of the technology disclosed in the present application. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. have been made. It is also possible to combine the components described in the first embodiment and the other embodiments to form a new embodiment.

Therefore, other embodiments will be illustrated below.

In the first embodiment, as an example of the refrigerant leakage detection unit 31, a configuration in which a refrigerant detector 31a is provided to directly react with the refrigerant to detect the leakage has been described. However, in the refrigerant leakage detection, it is possible to detect even from the operating state of the heat pump device 41. For example, using the refrigerant temperature detected by the first refrigerant temperature detection unit 32a or the second refrigerant temperature detection unit 32b arranged to control the compressor 25 or the like, the control unit 35 has an abnormal refrigerant temperature. It may be configured to function as a refrigerant leakage detection unit 31 that detects the occurrence of refrigerant leakage from changes.

In this case, the position of the conduit 24 in which the first refrigerant temperature detection unit 32a or the second refrigerant temperature detection unit 32b is arranged and the refrigerant temperature is detected is on the high pressure side, and the refrigerant leaks into the heat pump device 41. As the amount of refrigerant decreases, the discharge temperature of the compressor 25 tends to rise. Further, the discharge pressure tends to decrease, and the condensation temperature of the radiator 23 does not rise to a predetermined temperature. Therefore, the occurrence of refrigerant leakage can be detected by comparing the predetermined refrigerant temperature in the normal operating state with the refrigerant temperature in the operating state in which the amount of refrigerant is small and grasping the change tendency. By using the first refrigerant temperature detection unit 32a or the second refrigerant temperature detection unit 32b in this way and including the refrigerant leakage detection unit 31 in the control unit 35, the refrigerant leakage detection unit 31 can be constructed at low cost. ..

The position of the conduit 24 for detecting the refrigerant temperature is not limited to the high pressure side. It may be on the low pressure side, for example, before the suction port of the compressor 25. Further, the position may be a position where the evaporation temperature of the heat absorber 22 can be detected. Even at these positions, the occurrence of refrigerant leakage can be detected by grasping the predetermined refrigerant temperature depending on the operating state and the tendency of change at the time of refrigerant leakage.

Further, the refrigerant temperature detected by the refrigerant temperature detecting unit 32 gradually changes as the dry state of the clothes in the rotary tank 4 changes. Therefore, the control unit 35 can detect the occurrence of refrigerant leakage more accurately by detecting the temperature of the drying air together with the temperature of the drying air detected by the air temperature detecting unit 33 arranged in the air passage 19. ..

Further, in the case of a slow leak in which the refrigerant leaks very little, the refrigerant temperature may not change noticeably in the initial stage. In this case, since the amount of the leaking flammable refrigerant itself is small, the possibility of ignition is low. Considering such a case, the refrigerant leakage detection unit 31 can form a double refrigerant leakage detection unit 31 by being used in combination with the refrigerant detector 31a that directly detects the refrigerant, which is more preferable.

According to the present disclosure, when a leak of a flammable refrigerant is detected, the flammable refrigerant can be contained in the air passage to prevent the flammable refrigerant from igniting and enhance safety. Therefore, a heat pump containing the flammable refrigerant can be improved. It can be applied to a clothes dryer, a washer / dryer, etc. equipped with an apparatus.

1 Water tank 2 Housing 2a Opening 3 Suspension mechanism 4 Rotating tank 4a Rotating shaft 5 Hole 6 Baffle 7 Motor 8 Door 9 Packing 10 Water supply route 11 Water supply valve 12 Drain valve 13 Drainage route 14 Heater 15 Water temperature detector 16 Water level detector 17 Exhaust port 18 Blower port 19 Blower 20 Filter 21 Blower 22 Heat absorber 23 Heat radiator 23a End plate 23b Space 24 Pipe line 25 Compressor 30 Lock mechanism 31 Refrigerant leak detector 31a Refrigerant detector 32 Refrigerant temperature detector 32a 1st Refrigerant temperature detection unit 32b 2nd refrigerant temperature detection unit 33 Air temperature detection unit 33a 1st temperature detection unit 33b 2nd temperature detection unit 35 Control unit 36 Operation display unit 36a Operation unit 36b Display unit 39 Notification unit 40 Buzzer 41 Heat pump device 42 Squeezer 100 Drum type washer / dryer

Claims (4)

A housing, a rotary tub provided in the housing for accommodating laundry and rotating,
A door that closes the opening of the housing into which the laundry is taken in and out, a lock mechanism that prevents the door from opening, and a lock mechanism.
An air passage provided so that the air in the rotary tank circulates, and
A blower device provided in the air passage to circulate the air, a heat pump device to dehumidify and heat the circulated air, and a heat pump device.
A refrigerant leak detection unit that detects the leakage of the refrigerant contained in the heat pump device, and
Equipped with a control unit that executes drying operation,
The heat pump device has a flammable refrigerant in the pipeline and has.
The control unit is configured to operate the lock mechanism so that the door does not open when the refrigerant leakage detection unit detects the leakage of the flammable refrigerant.
Clothes dryer. The refrigerant leakage detection unit includes a refrigerant detector which is arranged at a predetermined position in the air passage and detects the flammable refrigerant.
The clothes dryer according to claim 1. The refrigerant leakage detection unit includes a refrigerant temperature detection unit arranged in the pipeline of the heat pump device, and the control unit generates a refrigerant leakage from a change in the refrigerant temperature detected by the refrigerant temperature detection unit. Configured to detect,
The clothes dryer according to claim 1 or 2. When the refrigerant leakage detection unit detects a refrigerant leakage, the control unit includes a notification unit that notifies by a predetermined method.
The clothes dryer according to any one of claims 1 to 3.

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