JP2022054146A - Washing and drying machine - Google Patents

Abstract

To provide a washing and drying machine which can determine presence/absence of the mounting of a filter for drying operation, at low cost.SOLUTION: A washing and drying machine 1 includes: a housing 2; a washing tub 3; an air circulation passage 20; a blower part 21 for circulating the air in the washing tub 3 by taking it in the air circulation passage 20 and returning it to the washing tub 3; and a heat pump 25. The washing and drying machine 1 includes: a filter F2 arranged in the air circulation passage 20 and capable of being taken out of the housing 2; a refrigerant temperature measurement part 35 for measuring the temperature of a refrigerant compressed by a compressor 26 of the heat pump 25; and a control part 30 for controlling the blower part 21 and the heat pump 25 and for executing a drying operation. In the case where the temperature measured by the refrigerant temperature measurement part 35 after elapse of predetermined time from the start of the drying operation or the degree of the temperature rise is below a predetermined threshold value, the control part 30 determines that the filter F2 does not exist in the air circulation passage 20.SELECTED DRAWING: Figure 1

Description

The present invention relates to a washer / dryer.

The washer-dryer described in Patent Document 1 below has an outer case, a water tank arranged inside the outer case, a rotating drum housed inside the water tank, and for supplying dry air to the inside of the rotating drum. Includes a dry air passage and a blower unit. The dry air passage includes a lead-out duct and an introduction duct integrally formed with the water tank. The blower unit consists of a connecting duct connected to the lead-out duct, a blower fan connected to the connecting duct, a heater connecting the blower fan and the introduction duct, and a drying mounted on the filter mounting portion provided in the connecting duct. Includes filters. In the drying operation of the washing / drying machine, the air in the water tank flows through the outlet duct and the connecting duct according to the drive of the blower fan, is heated by the heater to become dry air, and flows into the water tank from the introduction duct to the rotating drum. Dry the laundry inside. The drying filter captures dust contained in the air flowing through the connecting duct.

The drying filter can be removed from the opening provided on the upper surface of the filter mounting portion. In the vicinity of the filter mounting portion, a sound collecting portion for collecting the sound of the dry air flowing in the connecting duct and acquiring a sound signal is provided. In the drying operation with the drying filter attached to the filter mounting part, the noise level of the dry air flowing in the connecting duct is relatively low because the drying air passage is closed and the sound generated by the blower fan is relatively quiet. low. On the other hand, in the drying operation with the drying filter not attached to the filter mounting portion, the air passage resistance in the connecting duct decreases and the air volume of the drying air increases, so that the noise level of the drying air flowing in the connecting duct increases. Relatively expensive. In the washer / dryer, it is determined whether or not the drying filter is attached to the filter mounting portion based on the difference in the intensity of the sound signal acquired by the sound collecting portion, that is, the noise level.

Japanese Unexamined Patent Publication No. 2014-42741

In the washer / dryer described in Patent Document 1, since the sound collecting unit for determining whether or not the drying filter is attached is expensive, an increase in cost is unavoidable.

The present invention has been made under such a background, and an object of the present invention is to provide a washer / dryer capable of determining whether or not a filter for drying operation is attached at low cost.

The present invention includes a housing, a washing tub arranged in the housing and accommodating laundry, and an air circulation path including an outlet and a return port arranged in the housing and connected to the washing tub. An air blower that circulates the air in the washing tub by taking it out from the outlet into the air circulation path and returning it to the washing tub from the return port, a compressor that compresses the refrigerant, and the air circulation path. A heat pump that includes a heat exchanger that is arranged and exchanges heat between the refrigerant and the air in the air circulation path, and a refrigerant circulation path that circulates the refrigerant between the compressor and the heat exchanger, and the said. It controls a filter arranged in the air circulation path to capture foreign matter from the air in the air circulation path, a refrigerant temperature measuring unit for measuring the temperature of the refrigerant compressed by the compressor, the blower unit, and the heat pump. Thereby, a control unit for executing a drying operation for drying the laundry in the washing tub, a first door for opening and closing the first attachment / detachment port provided in the air circulation path, and a first door provided in the housing. 2 A washer / dryer including a second door for opening and closing the attachment / detachment port, wherein the filter can be removed from the air circulation path to the outside of the housing through the first attachment / detachment port and the second attachment / detachment port. If the temperature measured by the refrigerant temperature measuring unit after a lapse of a predetermined time from the start of the drying operation, or if the degree of increase in the temperature is less than a predetermined threshold value, the control unit may use the control unit to use the filter as the air circulation path. It is a washer / dryer that is judged not to be inside.

Further, in the present invention, the heat exchanger includes a first heat exchanger that is heated by the refrigerant compressed by the compressor and a second heat exchanger that is cooled by the refrigerant that has passed through the first heat exchanger. The refrigerant circulation path includes a discharge path for guiding the refrigerant compressed by the compressor to the first heat exchanger and a return path for guiding the refrigerant from the second heat exchanger to the compressor. The temperature measured by the temperature measuring unit is the temperature of the flow path of the refrigerant in the first heat exchanger or the temperature of the discharge path.

Further, in the present invention, the washing / drying machine further includes an air temperature measuring unit for measuring the temperature of the air in the washing tub, and the temperature measured by the air temperature measuring unit after a lapse of a predetermined time from the start of the drying operation. Alternatively, even when the degree of temperature rise is less than a predetermined threshold value, the control unit determines that the filter is not in the air circulation path.

Further, the present invention further provides a notification unit for notifying that the filter is not in the air circulation path when the control unit determines that the washer / dryer is not in the air circulation path. It is characterized by including.

Further, the present invention is characterized in that the drying operation is extended when the control unit determines that the filter is not in the air circulation path.

According to the present invention, in the drying operation of the washer / dryer, the air in the washing tub is taken out from the outlet into the air circulation path and returned to the inside of the washing tub from the return port according to the operation of the blower. It circulates. The circulating air is heated by heat exchange with the heat exchanger of the heat pump in the drying circulation path to become hot air, which dries the laundry in the washing tub. A filter placed in the air circulation path captures foreign matter from the air in the air circulation path.
The user opens the first door and the second door to open the first attachment / detachment port of the air circulation path and the second attachment / detachment port of the housing, and sets the filter in the air circulation path to the first attachment / detachment port and the second attachment / detachment port. It can be removed from the attachment / detachment port to the outside of the housing for maintenance. When the user returns the filter from the first attachment / detachment port and the second attachment / detachment port into the air circulation path and closes the first door and the second door, the attachment of the filter to the air circulation path is completed.
In a washer / dryer using a heat pump, when the drying operation is started with the filter attached to the air circulation path, the temperature of the refrigerant compressed by the compressor in the heat pump continues to rise, so that a predetermined time from the start of the drying operation. The temperature of the refrigerant after the lapse of time, or the degree of increase in the temperature, becomes equal to or higher than a predetermined threshold value set for each. Therefore, in the washer / dryer, when the temperature of the refrigerant measured by the refrigerant temperature measuring unit after a lapse of a predetermined time from the start of the drying operation or the degree of increase in the temperature is less than a predetermined threshold value, the control unit performs a filter. Is not in the air circulation path. By paying attention to the temperature of the refrigerant of the heat pump in this way, it is possible to determine at low cost whether or not a filter for dry operation is installed without adopting an expensive configuration for detecting whether or not a filter is installed. The temperature of the refrigerant measured by the refrigerant temperature measuring unit may be the temperature of the refrigerant itself or the temperature of the flow path through which the refrigerant flows.

Further, according to the present invention, the heat exchanger includes a first heat exchanger that is heated by the refrigerant compressed by the compressor and a second heat exchanger that is cooled by the refrigerant that has passed through the first heat exchanger. The refrigerant circulation path includes a discharge path for guiding the refrigerant compressed by the compressor to the first heat exchanger and a return path for guiding the refrigerant from the second heat exchanger to the compressor. The temperature of the flow path of the refrigerant and the temperature of the discharge path in the first heat exchanger tend to continue to rise remarkably when the drying operation is started with the filter attached to the air circulation path. By paying attention to the temperature of, it is possible to accurately judge whether or not the filter is attached.

Further, according to the present invention, in the washer / dryer, when the drying operation is started with the filter attached to the air circulation path, the temperature of the air in the washing tub continues to rise, so that the temperature of the air in the washing tub continues to rise. The temperature of the air after the lapse of time, or the degree of increase in the temperature, becomes equal to or higher than a predetermined threshold. Therefore, in the washer / dryer, even when the temperature of the air measured by the air temperature measuring unit after a lapse of a predetermined time from the start of the drying operation or the degree of increase in the temperature is less than a predetermined threshold value, the control unit controls the filter. Is not in the air circulation path. By paying attention not only to the temperature of the refrigerant of the heat pump but also to the temperature of the air in the washing tub in this way, it is possible to determine whether or not the filter is attached at low cost.

Further, according to the present invention, in the washer / dryer, when the control unit determines that the filter is not in the air circulation path, the notification unit notifies the user to that effect. It is possible to encourage the installation of a filter.

Further, according to the present invention, when the control unit determines that the filter is not in the air circulation path, the drying operation is extended, so that the laundry in the washing tub is removed because the filter is not in the air circulation path. Even if it is difficult to dry, the laundry can be dried to the end.

It is a schematic vertical sectional right side view of the washer-dryer which concerns on one Embodiment of this invention. It is a block diagram which shows the electric structure of a washer / dryer. It is a time chart which shows the time-dependent change of the temperature of each measurement point during the drying operation of the washer / dryer with the filter attached. It is a time chart which shows the time-dependent change of the temperature of each measurement point during the drying operation with the filter not attached. It is a flowchart which shows the filter detection process which concerns on 1st Example in a drying operation. It is a flowchart which shows the filter detection process which concerns on 2nd Embodiment. It is a flowchart which shows the filter detection process which concerns on 3rd Example. It is a flowchart which shows the drying operation.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic vertical cross-sectional right side view of the washer / dryer 1 according to the embodiment of the present invention. The direction orthogonal to the paper surface of FIG. 1 is referred to as the left-right direction X of the washer-dryer 1, the left-right direction in FIG. 1 is referred to as the front-rear direction Y of the washer-dryer 1, and the vertical direction in FIG. 1 is the vertical direction of the washer-dryer 1. It is called Z. Of the left-right directions X, the back side on the paper surface of FIG. 1 is referred to as the left side X1, and the front side on the paper surface of FIG. 1 is referred to as the right side X2. Of the front-rear direction Y, the left side in FIG. 1 is referred to as the front side Y1, and the right side in FIG. 1 is referred to as the rear side Y2. Of the vertical directions Z, the upper side is called the upper side Z1 and the lower side is called the lower side Z2.

The washing / drying machine 1 passes from the washing tub 3 through the housing 2, the washing tub 3 arranged in the housing 2, the water supply channel 4 and the drainage channel 5 connected to the washing tub 3, and the drainage channel 5. It includes a drainage filter 6 that captures foreign matter from the discharged water. The washing tub 3 includes an outer tub 7 and a drum 8 housed in the outer tub 7. Therefore, the washer / dryer 1 is a so-called drum-type washer / dryer. The washer / dryer 1 includes a motor 9 for rotating the drum 8 and a drying unit 10 for drying the laundry L housed in the drum 8.

The housing 2 is formed in a box shape. The housing 2 has a front wall 2A extending vertically, a top wall 2B extending horizontally from the upper end of the front wall 2A to the rear side Y2, and a bottom wall 2C extending horizontally from the lower end of the front wall 2A to the rear side Y2. .. The front wall 2A is formed with an opening 2D that allows the inside and outside of the housing 2 to communicate with each other. The front wall 2A is provided with a door 11 that opens and closes the opening 2D.

The outer tank 7 is connected to the upper end of the shock absorber 12 extending from the bottom wall 2C of the housing 2 to the upper side Z1. As a result, the entire washing tub 3 including the outer tub 7 and the drum 8 is elastically supported by the bottom wall 2C via the shock absorber 12. The outer tank 7 has a cylindrical circumferential wall 7A centered on an axis J extending in the front-rear direction Y along the horizontal direction H, and a disk-shaped back wall 7B in which the hollow portion of the circumferential wall 7A is closed from the rear side Y2. It has a ring-shaped front wall 7C connected to the front edge of the circumferential wall 7A.

The back wall 7B is arranged vertically and has an annular outer peripheral portion 7D and a cylindrical central portion 7E protruding one step from the outer peripheral portion 7D to the rear side Y2. At the center of the central portion 7E, a through hole 7F is formed so as to pass through the central portion 7E in the front-rear direction Y along the axis J. The front wall 7C has an annular first portion 7G protruding from the front end edge of the circumferential wall 7A toward the axis J side, a cylindrical second portion 7H protruding from the inner peripheral edge of the first portion 7G to the front side Y1, and a second portion. It has an annular third part 7I protruding from the front end edge of the second part 7H toward the axis J side. Inside the third part 7I, an entrance / exit 7J communicating with the front side Y1 is formed in the hollow portion of the circumferential wall 7A. The doorway 7J communicates with the opening 2D of the housing 2 facing the rear side Y2 from the rear side Y2.

The water supply channel 4 has one end (not shown) connected to a faucet (not shown) and the other end 4A connected to, for example, the central portion 7E of the back wall 7B of the outer tank 7. At the time of water supply, water from the faucet is supplied from the water supply channel 4 into the outer tank 7. Water such as tap water or detergent water in which detergent is dissolved in tap water is stored in the outer tank 7. A water supply valve 13 that is opened and closed to start and stop water supply is provided in the middle of the water supply channel 4.

The drainage channel 5 is connected to the lower end of the outer tank 7, for example, the lower end of the first portion 7G of the front wall 7C. The water in the outer tank 7 is discharged to the outside of the machine from the drainage channel 5. A drain valve 14 that is opened and closed to start and stop drainage is provided in the middle of the drainage channel 5.

The drainage filter 6 is provided in the drainage channel 5 at an upstream portion closer to the outer tank 7 than the drainage valve 14. Since the front end of the drainage filter 6 is exposed from the front wall 2A of the housing 2 to the front side Y1, the user can grasp the front end of the drainage filter 6 and attach / detach the drainage filter 6 to / from the housing 2. .. A known configuration can be used as the configuration of the drainage filter 6.

The drum 8 is one size smaller than the outer tank 7. The drum 8 has a cylindrical peripheral wall 8A arranged coaxially with the circumferential wall 7A of the outer tank 7, a disk-shaped back wall 8B in which the hollow portion of the circumferential wall 8A is closed from the rear side Y2, and the circumferential wall 8A. It has an annular wall 8C protruding from the front end edge of the shaft toward the axis J side. In the drum 8, at least the circumferential wall 8A is formed with a plurality of through holes 8D, and the water in the outer tank 7 travels between the outer tank 7 and the drum 8 via the through holes 8D. Therefore, the water level in the outer tank 7 and the water level in the drum 8 coincide with each other. At the center of the back wall 8B of the drum 8, a support shaft 15 extending along the axis J to the rear side Y2 is provided. The rear end portion of the support shaft 15 is arranged on Y2 behind the back wall 7B through the through hole 7F of the back wall 7B of the outer tank 7.

Inside the annular wall 8C, an entrance / exit 8E communicating with the front side Y1 is formed in the hollow portion of the circumferential wall 8A. The doorway 8E communicates with the doorway 7J of the outer tank 7 and the opening 2D of the housing 2 facing each other from the rear side Y2. The doorway 7J and the doorway 8E are collectively opened and closed by the door 11 together with the opening 2D. The user of the washer / dryer 1 puts the laundry L in and out of the drum 8 through the opened opening 2D, the doorway 7J, and the doorway 8E.

The motor 9 has a disk shape having substantially the same outer diameter as the central portion 7E of the back wall 7B of the outer tank 7, and is arranged in the rear side Y2 of the central portion 7E and fixed to the central portion 7E in the housing 2. To. The motor 9 is connected to a support shaft 15 provided on the drum 8. The driving force generated by the motor 9 is transmitted to the support shaft 15, and the drum 8 is rotationally driven around the axis J together with the support shaft 15. A clutch mechanism (not shown) that transmits or disconnects the driving force of the motor 9 to the support shaft 15 may be provided between the motor 9 and the support shaft 15.

The drying unit 10 is a branch for maintaining the air circulation path 20 and the air blowing unit 21 for circulating the air in the washing tub 3, the filter unit 22 for capturing foreign matter from the circulating air, and the filter unit 22. It includes a passage 23 and a water injection valve 24, and a heat pump 25 that heats and dehumidifies the circulating air.

The air circulation path 20 is a flow path arranged around the outer tank 7 in the housing 2. The air circulation passage 20 has an intermediate portion 20A extending in the front-rear direction Y at a position higher than the outer tank 7, a rear portion 20B extending from the rear end of the intermediate portion 20A to the lower Z2, and a rear portion 20B extending from the front end of the intermediate portion 20A to the lower Z2. It has a front portion 20C extending to. An outlet 20D is formed at the front end of the lower end portion of the rear portion 20B. The outlet 20D is connected to a portion higher than the upper limit water level in the outer peripheral portion 7D of the back wall 7B of the outer tank 7, and communicates with the outer tank 7 from the rear side Y2. A return port 20E is formed at the lower end of the front portion 20C. The return port 20E is connected to the upper end portion of the second portion 7H of the front wall 7C of the outer tank 7 and communicates with the outer tank 7 from the upper side Z1. The opening to which the outlet 20D is connected in the outer peripheral portion 7D is referred to as an outlet 7K, and the opening to which the return port 20E is connected in the front wall 7C is referred to as an inlet 7L.

The blower portion 21 is a blower fan including a rotary blade 21A arranged in an area on the upstream side close to the outlet 20D in the intermediate portion 20A of the air circulation path 20 and an electric motor 21B for rotating the rotary blade 21A. .. When the rotary blade 21A rotated, the air in the washing tub 3, that is, the air in the outer tub 7 and the air in the drum 8 was taken out from the outlet 20D, that is, the outlet 7K into the air circulation path 20 as shown by the thick broken line arrow. Later, it is returned to the washing tub 3 from the return port 20E, that is, the entrance 7L. As a result, the air in the washing tub 3 circulates in the washing tub 3 and the air circulation path 20 in order.

The filter unit 22 is arranged in the region on the upstream side closer to the outlet 20D than the rotary blade 21A in the air circulation path 20, specifically, in the rear portion 20B. The filter unit 22 includes one or more filters F1. The filter F1 is a drying filter composed of a mesh sheet and a frame supporting the mesh sheet. The filter F1 is arranged in a vertically extended posture at a position where air flowing through the air circulation path 20 passes. When a plurality of filters F1 are provided, these filters F1 are arranged so as to overlap each other in the air flow direction in the air circulation path 20. When the air taken out from the outlet 20D for circulation and flowing in the air circulation path 20 passes through the filter F1, foreign matter such as lint contained in the air is captured by the filter F1.

The branch path 23 branches from the upstream portion of the water supply channel 4 closer to the faucet than the water supply valve 13 and is connected to the filter unit 22. The water injection valve 24 is provided in the branch passage 23, and is opened and closed to start and stop water injection into the filter F1 of the filter unit 22. When the water injection valve 24 is opened, water from the water supply passage 4 is supplied to the filter unit 22 through the branch passage 23, and is poured into the filter F1 from the upper side Z1. As a result, the foreign matter captured by the filter F1 is peeled off from the filter F1, falls from the outlet 20D of the air circulation path 20 into the outer tank 7, and is captured by the drainage filter 6. The foreign matter captured by the drainage filter 6 is removed when the user removes and maintains the drainage filter 6 at an appropriate timing.

The heat pump 25 circulates the refrigerant between the compressor 26 that compresses the refrigerant, the heat exchanger 27 that exchanges heat between the refrigerant and the air in the air circulation path 20, and the compressor 26 and the heat exchanger 27. Includes a refrigerant circulation path 28.

As the compressor 26, a known electric compressor can be adopted. For example, the compressor 26 is arranged at a position lower than the axis J, which is the rotation axis of the drum 8, and is fixed to the bottom wall 2C of the housing 2.

The heat exchanger 27 is arranged in the intermediate portion 20A of the air circulation path 20 on the downstream side closer to the return port 20E than the rotary blade 21A of the blower portion 21, specifically, in the region of the front side Y1. The heat exchanger 27 connects a first heat exchanger 27A, which is a capacitor on the heating side, a second heat exchanger 27B, which is an evaporator on the cooling side, a first heat exchanger 27A, and a second heat exchanger 27B. Includes capillary tube 27C.

In this embodiment, the first heat exchanger 27A is arranged on the downstream side, that is, on the front side Y1 of the second heat exchanger 27B in the intermediate portion 20A. The first heat exchanger 27A is provided with a plurality of heat dissipation fins 27D, and the second heat exchanger 27B is provided with a plurality of cooling fins 27E. A refrigerant flow path 27F is provided inside the first heat exchanger 27A, and a refrigerant flow path 27G is provided inside the second heat exchanger 27B. Each of the flow path 27F and the flow path 27G is a metal pipe such as aluminum. The plurality of heat radiation fins 27D are arranged around the flow path 27F. The plurality of cooling fins 27E are arranged around the flow path 27G. The capillary tube 27C connects the flow path 27F and the flow path 27G.

The refrigerant circulation path 28 is composed of a metal pipe such as aluminum, and connects the compressor 26 and the heat exchanger 27. The refrigerant circulation path 28 is a circulation flow path in which the refrigerant is taken out from the compressor 26 and then returned to the compressor 26 via the heat exchanger 27. The refrigerant circulation path 28 includes a discharge path 28A that guides the refrigerant compressed by the compressor 26 to the flow path 27F in the first heat exchanger 27A. The refrigerant circulation path 28 has a return path 28B that guides the refrigerant flowing from the first heat exchanger 27A to the compressor 26 from the second heat exchanger 27B via the capillary tube 27C through the flow path 27G of the second heat exchanger 27B. Further included. The flow path 27F may be regarded as a part of the discharge path 28A, or the flow path 27G may be regarded as a part of the return path 28B.

The washer / dryer 1 further includes a control unit 30 configured by a substrate on which a microcomputer with a built-in timer is mounted. Electrical components such as a motor 9, a drying unit 10, a water supply valve 13, a drain valve 14, and a water injection valve 24 are electrically connected to the control unit 30 (see also FIG. 2). The control unit 30 executes the washing / drying operation by controlling the operation of these electric parts. The washing / drying operation includes a washing step, a rinsing step, a dehydration step, and a drying step. The drying step may be performed separately from the washing / drying operation as a single drying operation. In the following description, the drying step and the drying operation are the same.

Prior to the start of the washing process, the detergent is poured into the drum 8. In the washing step, the control unit 30 opens the water supply valve 13 for a predetermined time with the drain valve 14 closed to supply water to the outer tank 7 and the drum 8, and then rotates the drum 8 by the motor 9. As a result, the laundry L in the drum 8 is beaten and washed. In the tap washing, tumbling is repeated in which the laundry L is lifted to some extent and then naturally falls to the water surface. Dirt is removed from the laundry L by the impact of tumbling and the detergent component contained in the detergent water collected in the drum 8. After a predetermined time has elapsed from the start of tumbling, when the control unit 30 opens the drain valve 14 to drain water, the washing process is completed.

In the rinsing step, the control unit 30 opens the water supply valve 13 for a predetermined time with the drain valve 14 closed to supply water to the outer tank 7 and the drum 8, and then rotates the drum 8 by the motor 9. Then, since the above-mentioned tumbling is repeated, the laundry L is rinsed by the tap water in the drum 8. When the control unit 30 drains water after a predetermined time has elapsed from the start of tumbling, the rinsing process is completed. The rinsing process may be repeated multiple times. In the dehydration step, the control unit 30 dehydrates and rotates the drum 8 with the drain valve 14 open. The laundry L in the drum 8 is dehydrated by the centrifugal force generated by the dehydration rotation of the drum 8. The water exuded from the laundry L due to dehydration is discharged to the outside of the machine through the drainage channel 5. The dehydration step may be carried out not only after the rinsing step but also after the washing step.

In the drying process, the control unit 30 operates the blower unit 21 and the compressor 26 of the heat pump 25 to generate hot air and circulate it between the drum 8 and the air circulation path 20, and the laundry in the drum 8 is generated. Supply to L. Specifically, in the heat pump 25, the refrigerant is compressed by the compressor 26 to become a high temperature and high pressure, and then dissipates heat when passing through the flow path 27F in the first heat exchanger 27A via the discharge path 28A. .. In the first heat exchanger 27A, the heat radiation fins 27D are heated by the heat radiation of the refrigerant passing through the flow path 27F, and the temperature becomes high. The refrigerant that has passed through the first heat exchanger 27A becomes cold due to being depressurized when passing through the capillary tube 27C, and then when passing through the flow path 27G in the second heat exchanger 27B, the cooling fins 27E Cool down.

The air in the air circulation path 20 in the drying step is dehumidified as it passes around the cooling fins 27E of the second heat exchanger 27B in the air circulation path 20. The dehumidified air is heated as it passes around the heat radiation fins 27D of the first heat exchanger 27A to become hot air. That is, the air in the air circulation path 20 becomes hot air by heat exchange with the refrigerant flowing through the first heat exchanger 27A. This hot air flows into the outer tub 7 from the inlet 7L of the outer tub 7 and is supplied to the laundry L in the drum 8, so that the laundry L is dried. At this time, the control unit 30 may operate the motor 9 to rotate the drum 8. As a result, the laundry L can be evenly exposed to hot air.

During the drying step, foreign matter such as lint flows on the hot air, but as described above, it is captured by the filter F1 of the filter unit 22. As a maintenance process, the control unit 30 opens the water injection valve 24 to inject water into the filter F1 and remove foreign matter from the filter F1 at an appropriate timing during or after the drying process.

The washer / dryer 1 further includes a filter F2 for capturing foreign matter that the filter F1 could not capture in the air circulation path 20. There are one or more filters F2. Like the filter F1, the filter F2 is a drying filter composed of a mesh sheet and a frame supporting the mesh sheet. The filter F2 is arranged in the middle portion 20A of the air circulation path 20, for example, between the rotary blade 21A of the blower portion 21 and the heat exchanger 27. The filter F2 is arranged, for example, in a vertically extending posture so as to cross the air flowing through the air circulation path 20. When a plurality of filters F2 are provided, these filters F2 are arranged so as to overlap each other in the air flow direction in the air circulation path 20.

The filter F1 can be automatically maintained without being removed as described above, but the filter F2 needs to be removed and regularly maintained. Therefore, the top wall 20F in the middle portion 20A of the air circulation path 20 is provided with a first attachment / detachment port 20G facing the upper side Z1 on the filter F2. A second attachment / detachment opening 2E is provided at a position directly above the first attachment / detachment opening 20G on the top wall 2B of the housing 2. Each of the first attachment / detachment port 20G and the second attachment / detachment port 2E is an opening having a size for passing the filter F2.

The washer / dryer 1 further includes a first door 31 that opens and closes the first attachment / detachment port 20G, and a second door 32 that opens / closes the second attachment / detachment opening 2E. The first door 31 can rotate around the hinge 33, for example, by being connected to the top wall 20F of the air circulation path 20 via the hinge 33. The second door 32 can also rotate around the hinge 34 by being connected to the top wall 2B of the housing 2 via the hinge 34, for example.

The user opens the first attachment / detachment port 20G and the second attachment / detachment port 2E by rotating the first door 31 and the second door 32 to the upper side Z1, and the filter F2 in the air circulation path 20 is the first attachment / detachment port. It can be removed from the air circulation path 20 to the outside of the housing 2 through the 20G and the second attachment / detachment port 2E, and maintenance such as cleaning of the filter F2 can be performed. The user returns the taken-out filter F2 from the first attachment / detachment port 20G and the second attachment / detachment port 2E into the air circulation path 20, and rotates the first door 31 and the second door 32 to the lower side Z2. 1 Close the attachment / detachment port 20G and the second attachment / detachment port 2E. This completes the attachment of the filter F2 to the air circulation path 20. A positioning unit (not shown) for positioning the filter F2 is provided in the air circulation path 20. Further, the first door 31 and the second door 32 may be integrated into one door that collectively opens and closes the first attachment / detachment port 20G and the second attachment / detachment port 2E. That is, one of the first door 31 and the second door 32 may serve as the other.

In the following, when the first attachment / detachment port 20G and the second attachment / detachment port 2E are closed, the filter F2 is positioned at a predetermined mounting position in the air circulation path 20 so as to cross the air flowing through the air circulation path 20. , The filter F2 is attached to the air circulation path 20. On the other hand, the filter F2 outside the air circulation path 20 is referred to as a filter F2 not inside the air circulation path 20, that is, a filter F2 in a non-mounted state. When the filter F2 is not in the air circulation path 20, the first attachment / detachment port 20G and the second attachment / detachment port 2E may be in a closed state or an open state.

In the case of the filter F2 that can be removed from the air circulation path 20 to the outside of the housing 2, it is assumed that the user forgets to return the removed filter F2 to the air circulation path 20. When the drying operation is executed without the filter F2 in the air circulation path 20, foreign matter adheres to the heat exchanger 27, so that heat exchange between the heat exchanger 27 and the air in the air circulation path 20 occurs. Since it becomes dull, the drying efficiency of the laundry L may decrease. Further, if the first attachment / detachment port 20G and the second attachment / detachment port 2E are left open, the air in the air circulation path 20 leaks from these attachment / detachment ports, so that the air is supplied to the laundry L from the air circulation path 20. Since the amount of hot air is reduced, the drying efficiency of the laundry L may be further reduced. If the drying efficiency of the laundry L is lowered, it takes time to finish drying the laundry L, so that there is a concern that the power consumption and the drying operation are increased.

As described above, the filter F2 needs to be attached to the air circulation path 20 during the drying operation, but when the first door 31 and the second door 32 are closed, the user can use the air circulation path 20. The presence or absence of the filter F2 cannot be visually confirmed from the outside of the washer / dryer 1. Therefore, the control unit 30 executes a filter detection process for detecting the presence / absence of the filter F2 in the air circulation path 20 during the drying step. In connection with the filter detection process, the washer / dryer 1 has a refrigerant temperature measuring unit 35 that measures the temperature of the refrigerant compressed by the compressor 26 in the heat pump 25, and an air temperature measurement that measures the temperature of the air in the washing tub 3. A unit 36, an ammeter 37 for measuring the value of the current flowing through the motor 21B of the blower unit 21, and a notification unit 38 are further included (see also FIG. 2).

The refrigerant temperature measuring unit 35 includes a first thermometer 41, a second thermometer 42, and a third thermometer 43, all of which are configured by a thermistor. The first thermometer 41 is attached to the discharge path 28A of the heat pump 25 and measures the temperature of the surface of the discharge path 28A. Since the temperature of the surface of the discharge path 28A is almost the same as the temperature of the refrigerant flowing in the discharge path 28A, it can be regarded as the temperature of the refrigerant. The first thermometer 41 may be exposed in the discharge path 28A and measure the temperature of the refrigerant itself in the discharge path 28A.

The second thermometer 42 is attached to the first heat exchanger 27A of the heat pump 25, that is, the intermediate portion of the flow path 27F of the capacitor, and measures the temperature of the surface of the intermediate portion. Since the temperature of the surface of the flow path 27F is almost the same as the temperature of the refrigerant flowing in the flow path 27F, it can be regarded as the temperature of the refrigerant. The second thermometer 42 may be exposed in the flow path 27F and measure the temperature of the refrigerant itself in the flow path 27F.

The third thermometer 43 is attached to the second heat exchanger 27B of the heat pump 25, that is, the inlet portion connected to the capillary tube 27C in the flow path 27G of the evaporator, and measures the temperature of the surface of the inlet portion. Since the temperature of the surface of the flow path 27G is almost the same as the temperature of the refrigerant flowing in the flow path 27G, it can be regarded as the temperature of the refrigerant. The third thermometer 43 may be exposed in the flow path 27G and measure the temperature of the refrigerant itself in the inlet portion of the flow path 27G.

In the following, the temperature measured by the first thermometer 41 is referred to as "the temperature of the discharge path 28A", the temperature measured by the second thermometer 42 is referred to as "the intermediate temperature of the first heat exchanger 27A", and the third temperature. The temperature measured by the total 43 is called "the inlet temperature of the second heat exchanger 27B". "Temperature of discharge path 28A", "intermediate temperature of first heat exchanger 27A" and "second heat exchanger 27B" which are the measurement results of the first thermometer 41, the second thermometer 42 and the third thermometer 43. Each of the "inlet temperature" is input to the control unit 30 in real time.

The air temperature measuring unit 36 includes a fourth thermometer 44 and a fifth thermometer 45, both of which are configured by a thermistor. The fourth thermometer 44 is attached near the outlet 7K of the outer tank 7 and measures the temperature of the air at the outlet 7K. The fifth thermometer 45 is attached near the inlet 7L of the outer tank 7 and measures the temperature of the air at the inlet 7L. Hereinafter, the temperature measured by the 4th thermometer 44 is referred to as "outlet temperature of the outer tank 7", and the temperature measured by the 5th thermometer 45 is referred to as "inlet temperature of the outer tank 7". Each of the "outlet temperature of the outer tank 7" and the "inlet temperature of the outer tank 7", which are the measurement results of the fourth thermometer 44 and the fifth thermometer 45, is input to the control unit 30 in real time.

As the ammeter 37, a known ammeter can be adopted. The measurement result of the ammeter 37 is input to the control unit 30 in real time. The notification unit 38 may be a display unit of a liquid crystal touch panel provided on the front wall 2A of the housing 2, or may be a buzzer built in the housing 2.

FIG. 3 is a time chart showing changes over time in the temperature of each measurement point during the drying operation with the filter F2 mounted in the air circulation path 20. FIG. 4 is a time chart showing changes over time in the temperature of each measurement point during the drying operation in a state where the filter F2 is taken out from the air circulation path 20. In each of the time charts of FIGS. 3 and 4, the horizontal axis indicates the elapsed time, and the vertical axis represents the “temperature of the discharge path 28A”, the “intermediate temperature of the first heat exchanger 27A”, and the “second heat exchanger”. "27B inlet temperature", "outer tank 7 outlet temperature" and "outer tank 7 inlet temperature" are shown respectively. The unit of elapsed time is "minutes" and the unit of temperature is "degrees".

Since the temperature of the refrigerant compressed by the compressor 26 of the heat pump 25 decreases as it passes through the discharge path 28A, the first heat exchanger 27A, and the second heat exchanger 27B in order, the temperature of the discharge path 28A is changed. It is higher than the intermediate temperature of the first heat exchanger 27A, and the intermediate temperature of the first heat exchanger 27A is higher than the inlet temperature of the second heat exchanger 27B. The circulating air flows into the air circulation path 20 from the outlet 7K of the outer tank 7, is heated by the first heat exchanger 27A, and then flows into the outer tank 7 from the inlet 7L of the outer tank 7, so that the outer tank 7 is used. The inlet temperature of 7 is higher than the outlet temperature of the outer tank 7.

FIG. 3 shows the measurement results in the drying operation started with the filter F2 attached to the air circulation path 20. In this case, the temperature of the discharge path 28A, the intermediate temperature of the first heat exchanger 27A, the inlet temperature of the second heat exchanger 27B, the outlet temperature of the outer tank 7, and the inlet temperature of the outer tank 7 are each dried. Although it is not stable for 10 minutes from the start, it always rises according to the operation of the blower 21 and the heat pump 25 after 10 minutes have passed from the start of the drying operation. Therefore, these temperatures are indicators of the state of dry operation. Further, since the intermediate temperature of the first heat exchanger 27A and the temperature of the discharge path 28A are also indexes indicating the state of the compressor 26, when these temperatures reach a predetermined upper limit value, the control unit 30 sends the compressor 26 to the compressor 26. Stop the dry operation for protection.

FIG. 4 shows the measurement results in the drying operation started in a state where the filter F2 is not in the air circulation path 20 and the first attachment / detachment port 20G of the air circulation path 20 and the second attachment / detachment port 2E of the housing 2 are open. show. When the drying operation is started without the user forgetting to return the filter F2 to the air circulation path 20, the temperature of the discharge path 28A and the intermediate temperature of the first heat exchanger 27A are each 30 minutes from the start of the drying operation. Although it rises, it saturates and does not rise 30 minutes after the start of the drying operation. In this case, the temperature of the discharge path 28A does not reach 60 degrees, and the intermediate temperature of the first heat exchanger 27A does not reach 45 degrees. The inlet temperature of the second heat exchanger 27B hardly rises from the start of the drying operation and does not reach 20 degrees.

Further, although the outlet temperature of the outer tank 7 and the inlet temperature of the outer tank 7 each rise for 20 minutes from the start of the drying operation, the outside air enters and exits at the first attachment / detachment port 20G and the second attachment / detachment port 2E. Therefore, after 20 minutes have passed from the start of the drying operation, these temperatures are saturated and do not rise. In this case, the inlet temperature of the outer tank 7 does not reach 55 degrees, and the outlet temperature of the outer tank 7 does not reach 30 degrees.

As described above, depending on the presence or absence of the filter F2 in the air circulation path 20, the temperature of the discharge path 28A, the intermediate temperature of the first heat exchanger 27A, the inlet temperature of the second heat exchanger 27B, and the outlet temperature of the outer tank 7. And the change characteristics of the inlet temperature of the outer tank 7 are different. In particular, in the washer / dryer 1 using the heat pump 25, when the drying operation is started with the filter F2 attached to the air circulation path 20, the temperature of the refrigerant compressed by the compressor 26 in the heat pump 25 continues to rise. .. Therefore, the temperature of the refrigerant or the degree of increase in the temperature after a lapse of a predetermined time from the start of the drying operation becomes equal to or higher than the predetermined threshold value described later. Therefore, the control unit 30 executes a filter detection process that mainly utilizes such a change characteristic of the refrigerant.

FIG. 5 is a flowchart showing a filter detection process according to the first embodiment during the drying operation. In the case of utilizing the change characteristic of the intermediate temperature of the first heat exchanger 27A, when the predetermined time of 30 minutes described above elapses from the start of the drying operation (YES in step S1), the control unit 30 uses the first heat exchanger. The temperature of the refrigerant, which is the intermediate temperature of 27A, is measured (step S2). If this measured value is, for example, a threshold value of 60 degrees or more (YES in step S3), the control unit 30 determines that the filter F2 is present in the air circulation path 20, ends the filter detection process, and performs the drying operation. continue. This threshold value is obtained in advance from the change characteristic of the intermediate temperature of the first heat exchanger 27A (see FIG. 3) and stored in the memory (not shown) of the control unit 30. The same applies to the other threshold values described below.

On the other hand, if the measured value for the intermediate temperature of the first heat exchanger 27A is less than the threshold value (NO in step S3), the control unit 30 determines that there is no filter F2 in the air circulation path 20, and air circulation. The notification unit 38 notifies that there is no filter F2 in the road 20 (step S4). Then, the control unit 30 ends the filter detection process and continues the drying operation.

In the filter detection process when the temperature change characteristic of the discharge path 28A is used, the control unit 30 also executes the processes of steps S1 to S4, but the threshold value in step S3 is obtained from the temperature change characteristic of the discharge path 28A. The value to be set, for example, 65 degrees. In the filter detection process when the change characteristic of the inlet temperature of the second heat exchanger 27B is used, the control unit 30 also executes the processes of steps S1 to S4, but the threshold value in step S3 is the second heat exchanger 27B. It is set to a value obtained from the change characteristic of the inlet temperature of, for example, 25 degrees.

FIG. 6 is a flowchart showing a filter detection process according to the second embodiment during the drying operation. In the case of utilizing the change characteristic of the intermediate temperature of the first heat exchanger 27A, when the predetermined time of 30 minutes described above elapses from the start of the drying operation (YES in step S11), the control unit 30 uses the first heat exchanger. The temperature of the refrigerant, which is the intermediate temperature of 27A, is measured for a predetermined time (step S12). Then, the control unit 30 calculates Δt indicating the degree of increase in the intermediate temperature of the first heat exchanger 27A in the predetermined time (step S13). Δt corresponds to the slope in the equation representing the transition of the intermediate temperature of the first heat exchanger 27A.

If Δt is, for example, 1 degree / min or more (YES in step S14), the control unit 30 determines that the filter F2 is present in the air circulation path 20, ends the filter detection process, and performs the drying operation. continue. On the other hand, if this measured value is less than the threshold value (NO in step S14), the control unit 30 determines that there is no filter F2 in the air circulation path 20, and determines that there is no filter F2 in the air circulation path 20. Notification is performed by the notification unit 38 (step S15). Then, the control unit 30 ends the filter detection process and continues the drying operation.

In the filter detection process when the temperature change characteristic of the discharge path 28A is used, the control unit 30 also executes the processes of steps S11 to S15, but the threshold value in step S14 is obtained from the temperature change characteristic of the discharge path 28A. Is set to the value to be. The same applies to the filter detection process when the change characteristic of the inlet temperature of the second heat exchanger 27B is used.

During the drying operation, the control unit 30 may execute only the filter detection process according to either one of the above first embodiment and the second embodiment, or may execute the filter detection process according to both embodiments in parallel. And execute it. In any case, when the temperature measured by the refrigerant temperature measuring unit 35 after a lapse of a predetermined time from the start of the drying operation or the degree of increase Δt of the temperature is less than the predetermined threshold value, the control unit 30 tells the control unit 30 that the filter F2 is air. It is determined that it is not in the circulation path 20 (steps S4 and S15). By paying attention to the temperature of the refrigerant of the heat pump 25 in this way, it is possible to accurately determine whether or not the filter F2 for dry operation is installed at low cost without using an expensive sensor for detecting whether or not the filter F2 is installed. Can be judged.

In particular, the intermediate temperature of the first heat exchanger 27A and the temperature of the discharge path 28A are the inlet temperatures of the second heat exchanger 27B when the drying operation is started with the filter F2 mounted on the air circulation path 20. (See Fig. 3). Therefore, by paying attention to these temperatures, it is possible to accurately determine whether or not the filter F2 is attached.

Then, when the control unit 30 determines that the filter F2 is not in the air circulation path 20, the notification unit 38 notifies that the filter F2 is not in the air circulation path 20 (steps S4 and S15). This makes it possible to encourage the user to attach the filter F2 to the air circulation path 20.

As described above, in the washer / dryer 1, when the drying operation is started with the filter F2 attached to the air circulation path 20, the circulating air is repeatedly heated by the heat exchanger 27, thereby causing the washing tub. The temperature of the air in 3 continues to rise (see FIG. 3). As a result, the temperature of the air after a lapse of a predetermined time from the start of the drying operation, or the degree of increase in the temperature becomes equal to or higher than the predetermined threshold value.

Therefore, in addition to the filter detection process when the temperature change characteristic of the refrigerant is used as described above, the control unit 30 may also execute the filter detection process using the change characteristic of the air in the washing tub 3. .. As a filter detection process utilizing the change characteristic of the air in the washing tub 3, the control unit 30 executes the processes of steps S1 to S4 or steps S11 to S15, but the predetermined time in steps S1 and S11, steps S3, and so on. The threshold value in S14 is set to a value obtained from the change characteristics of the outlet temperature and the inlet temperature of the outer tank 7. As an example of the predetermined time, for example, 20 minutes is set. As an example of the threshold value in step S14, for example, 1 degree / minute is set.

As described above, even when the temperature measured by the air temperature measuring unit 36 after the elapse of a predetermined time from the start of the drying operation or the degree of increase Δt of the temperature is less than the predetermined threshold value, the control unit 30 has the filter F2 air. It may be determined that it is not in the circulation path 20. By paying attention not only to the temperature of the refrigerant of the heat pump 25 but also to the temperature of the air in the washing tub 3, it is possible to determine whether or not the filter F2 is attached at low cost.

When there is no filter F2 in the air circulation passage 20, the resistance of the air in the air circulation passage 20 decreases, so that the current value of the motor 21B of the blower portion 21 tends to increase. Therefore, the control unit 30 may execute the filter detection process using the current characteristic of the motor 21B as the filter detection process according to the third embodiment.

FIG. 7 is a flowchart showing a filter detection process according to the third embodiment during the drying operation. For example, when a predetermined time of 10 minutes elapses from the start of the drying operation, the rotation speed of the motor 21B stabilizes at, for example, 5000 rpm. In that case (YES in step S21), the control unit 30 measures the current value of the motor 21B that is still operating by the ammeter 37 (step S22). If this measured value is, for example, less than the threshold value of 290 mA (NO in step S23), the control unit 30 determines that the filter F2 is present in the air circulation path 20, ends the filter detection process, and continues the drying operation. do. On the other hand, if this measured value is equal to or higher than the threshold value (YES in step S23), the control unit 30 determines that there is no filter F2 in the air circulation path 20, and determines that there is no filter F2 in the air circulation path 20. Notification is performed by the notification unit 38 (step S24). Then, the control unit 30 ends the filter detection process and continues the drying operation.

FIG. 8 is a flowchart showing the drying operation. The control unit 30 executes the filter detection process according to at least one of the above-mentioned first embodiment and the second embodiment during the drying operation, but also executes the filter detection process according to the third embodiment in parallel. It may be (step S31). When the control unit 30 determines in the filter detection process that there is no filter F2 in the air circulation path 20 (YES in step S32), the control unit 30 executes an extension process for extending the drying operation (step S33). As an example of the extension process, the control unit 30 extends the operation time itself of the drying operation by, for example, 30 minutes from the initially set operation time. The initial operation time is set according to the amount of the laundry L at the start of the washing operation or the like.

As an example of the extension process, the control unit 30 changes the drying end determination reference temperature at which the drying end of the laundry L can be determined. Examples of the drying end determination reference temperature include a high limiter temperature for the outlet temperature of the outer tank 7 and a temperature difference determination temperature for the difference between the outlet temperature of the outer tank 7 and the inlet temperature of the outer tank 7. When the outlet temperature of the outer tub 7 rises to the high limiter temperature or the difference between the outlet temperature of the outer tub 7 and the inlet temperature of the outer tub 7 becomes smaller than the temperature difference determination temperature, it is judged that the laundry L has finished drying. can. As an example of the extension process, the control unit 30 raises the high limiter temperature by, for example, 3 degrees from the initial high limiter temperature, or lowers the temperature difference determination temperature by, for example, 3 degrees from the initial temperature difference determination temperature. The initial temperature difference determination temperature is set according to the amount of the laundry L at the start of the washing operation or the like. When the drying end determination reference temperature is changed by the extension treatment in this way, the operation time of the drying operation is substantially extended.

Then, regardless of the presence or absence of the extension process, if the operation end condition is satisfied (YES in step S34), the control unit 39 ends the drying operation. When the operation end condition is satisfied, the operation time has elapsed, the outlet temperature of the outer tank 7 has risen to the high limiter temperature, or the outlet temperature of the outer tank 7 and the inlet temperature of the outer tank 7 are met. This is the case when the difference becomes small to the temperature difference determination temperature.

As described above, when the control unit 30 determines that the filter F2 is not in the air circulation path 20 (YES in step S32), the control unit 30 extends the drying operation (step S33). Therefore, even if the laundry L in the washing tub 3 is difficult to dry because the filter F2 is not in the air circulation path 20, the laundry L can be dried to the end.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.

For example, the filter unit 22 provided with the filter F1, the branch path 23 for maintenance of the filter F1 and the water injection valve 24 (see FIG. 1) may be omitted.

In the above-described embodiment, whether or not the filter F2 is in the air circulation path 20 is detected mainly based on the temperature of the refrigerant. Even if the filter F2 is in the air circulation path 20, if the change characteristics of the temperature of the refrigerant are significantly different depending on whether or not the filter F2 is present at the mounting position described above, the filter F2 in the air circulation path 20 is used. May be detected based on the temperature of the refrigerant. Thereby, it is possible to determine whether or not the filter F2 is correctly attached to the air circulation path 20, and if necessary, the user can be urged to reattach the filter F2 by the notification by the notification unit 38.

In the above-described embodiment, the filter detection process based on the temperature of the refrigerant is executed as the main filter detection process. Apart from this, the filter detection process based on the temperature of the air in the washing tub 3 and the filter detection process according to the third embodiment based on the current value of the motor 21B of the blower unit 21 are independent as the main filter detection process. May be executed in.

Further, in the drum-type washer-dryer 1 in the above-described embodiment, the washing tub 3 may be arranged so that the axis J is inclined with respect to the horizontal direction H. Further, the washer / dryer 1 may be a vertical washer / dryer in which the axis J extends vertically.

1 Washer / Dryer 2 Housing 2E 2nd Detachable Port 3 Washing Tank 20 Air Circulation Path 20D Outlet 20E Return Port 20G 1st Detachable Port 21 Blower 25 Heat Pump 26 Compressor 27 Heat Exchanger 27A 1st Heat Exchanger 27B 2nd Heat exchanger 27F Flow path 28 Refrigerant circulation path 28A Discharge path 28B Return path 30 Control unit 31 1st door 32 2nd door 35 Refrigerant temperature measurement unit 36 Air temperature measurement unit 38 Notification unit F2 filter L Laundry

Claims (5)

With the housing
A washing tub arranged in the housing and accommodating laundry,
An air circulation path arranged in the housing and including an outlet and a return port connected to the washing tub,
An air blower that circulates the air in the washing tub by taking it out from the outlet into the air circulation path and returning it to the washing tub from the return port.
A compressor that compresses the refrigerant, a heat exchanger that is arranged in the air circulation path and exchanges heat between the refrigerant and the air in the air circulation path, and a refrigerant between the compressor and the heat exchanger. A heat pump, including a refrigerant circulation path that circulates, and
A filter arranged in the air circulation path and capturing foreign matter from the air in the air circulation path,
A refrigerant temperature measuring unit that measures the temperature of the refrigerant compressed by the compressor,
A control unit that executes a drying operation to dry the laundry in the washing tub by controlling the blower unit and the heat pump.
A first door that opens and closes the first attachment / detachment port provided in the air circulation path, and
Including a second door that opens and closes a second attachment / detachment opening provided in the housing.
The filter can be removed from the air circulation path to the outside of the housing through the first attachment / detachment port and the second attachment / detachment port.
When the temperature measured by the refrigerant temperature measuring unit or the degree of increase in the temperature is less than a predetermined threshold value after a predetermined time has elapsed from the start of the drying operation, the control unit has the filter in the air circulation path. A washer / dryer that is judged not to be in the air. The heat exchanger includes a first heat exchanger that is heated by the refrigerant compressed by the compressor and a second heat exchanger that is cooled by the refrigerant that has passed through the first heat exchanger.
The refrigerant circulation path includes a discharge path for guiding the refrigerant compressed by the compressor to the first heat exchanger and a return path for guiding the refrigerant from the second heat exchanger to the compressor.
The washing / drying machine according to claim 1, wherein the temperature measured by the refrigerant temperature measuring unit is the temperature of the flow path of the refrigerant in the first heat exchanger or the temperature of the discharge path. Further includes an air temperature measuring unit for measuring the temperature of the air in the washing tub.
Even when the temperature measured by the air temperature measuring unit after a lapse of a predetermined time from the start of the drying operation or the degree of increase in the temperature is less than a predetermined threshold value, the control unit has the filter in the air circulation path. The washing / drying machine according to claim 1 or 2, which is determined not to be present. One of claims 1 to 3, further comprising a notification unit that notifies that the filter is not in the air circulation path when the control unit determines that the filter is not in the air circulation path. The washer / dryer described in. The washer / dryer according to any one of claims 1 to 4, wherein the control unit extends the drying operation when it is determined that the filter is not in the air circulation path.

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