CN116261613A

CN116261613A - Washing and drying integrated machine

Info

Publication number: CN116261613A
Application number: CN202180065925.2A
Authority: CN
Inventors: 八田聪
Original assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd; Aqua Co Ltd
Current assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd; Aqua Co Ltd
Priority date: 2020-09-25
Filing date: 2021-03-25
Publication date: 2023-06-13
Also published as: JP7486126B2; WO2022062350A1; JP2022054146A

Abstract

A washing and drying integrated machine (1), comprising: the air dryer comprises a box body (2), a washing drum (3), an air circulation path (20), an air supply part (21) for taking out air in the washing drum (3) into the air circulation path (20) and returning the air into the washing drum (3), a heat pump (25), a filter (F2) which is arranged in the air circulation path (20) and can be detached outside the box body (2), a refrigerant temperature measuring 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 air supply part (21) and the heat pump (25) to execute drying operation. When the temperature measured by the refrigerant temperature measuring unit (35) or the rising degree of the temperature after a predetermined time has elapsed from the start of the drying operation is smaller than a predetermined threshold value, the control unit (30) determines that there is no filter (F2) in the air circulation path (20).

Description

Washing and drying integrated machine

Technical Field

The invention relates to a washing and drying integrated machine.

Background

The washing and drying integrated machine described in patent document 1 below includes: the drying device comprises an outer box, a water drum arranged in the outer box, a rotary drum accommodated in the water drum, a drying air path for supplying drying air to the rotary drum, and an air supply unit. The drying air path comprises a guiding-out pipeline and a guiding-in pipeline which are integrally formed with the water drum. The air supply unit includes: the drying filter comprises a connecting pipe connected with the guiding pipe, a drum blowing fan connected with the connecting pipe, a heater connecting the drum blowing fan and the guiding pipe, and a drying filter arranged at a filter attachment part of the connecting pipe. In the drying operation of the washing and drying integrated machine, the air in the water drum flows through the guiding-out pipeline and the connecting pipeline along with the driving of the drum blower fan, is heated into drying wind by the heater, flows into the water drum from the guiding-in pipeline, and dries the washings in the rotary drum. The drying filter captures dust contained in the air flowing through the connecting duct.

The drying filter is detachable from an opening provided at an upper surface of the filter attachment portion. A sound collecting part for collecting the sound of the drying wind flowing through the connecting pipe to obtain the sound signal is arranged near the filter attaching part. In the drying operation in a state where the drying filter is attached to the filter attachment portion, the drying air path is in a closed state and the sound emitted from the drum blower fan is relatively quiet, and thus the noise level of the drying air flowing in the connecting duct is relatively low. On the other hand, in the drying operation in a state where the drying filter is not attached to the filter attachment portion, the resistance of the air passage in the connecting duct is reduced and the volume of the drying air is increased, so that the noise level of the drying air flowing in the connecting duct is relatively high. In the washing and drying integrated machine, whether the drying filter is attached to the filter attachment portion is judged according to the intensity of the sound signal acquired by the sound collecting portion, that is, the difference in noise level.

In the washing and drying integrated machine described in patent document 1, since the sound collecting portion for determining whether or not the drying filter is attached is expensive, an increase in cost is unavoidable.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2014-42741

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a washing and drying integrated machine capable of determining whether or not a filter for drying operation is attached at a low cost.

Solution for solving the problem

The invention relates to a washing and drying integrated machine, which comprises: a case; a washing cylinder configured in the box body for accommodating washings; an air circulation path which is disposed in the case and includes a discharge port and a return port connected to the washing tub; an air supply unit configured to circulate air in the washing tub by taking out the air from the take-out port into the air circulation path and returning the air from the return port into the washing tub; a heat pump, comprising: a compressor for compressing a refrigerant; a heat exchanger disposed in the air circulation path and configured to exchange heat between a refrigerant and air in the air circulation path; and a refrigerant circulation path for circulating a refrigerant between the compressor and the heat exchanger; a filter disposed in the air circulation path and configured to capture foreign matter from air in the air circulation path; a refrigerant temperature measuring unit for measuring a temperature of the refrigerant compressed by the compressor; a control unit for controlling the air supply unit and the heat pump to perform a drying operation for drying the laundry in the washing tub; a first door for opening and closing a first attachment/detachment port provided in the air circulation path; and a second door that opens and closes a second attachment/detachment port provided in the casing, wherein the filter is detachable from the air circulation path to the outside of the casing through the first attachment/detachment port and the second attachment/detachment port, and the control unit determines that the filter is not present in the air circulation path when a temperature measured by the refrigerant temperature measuring unit or an upward lift of the temperature after a predetermined time has elapsed since the start of the drying operation is less than a predetermined threshold.

Furthermore, the present invention is characterized in that the heat exchanger includes: a first heat exchanger that is heated by the refrigerant compressed by the compressor; and a second heat exchanger cooled by the refrigerant passing through the first heat exchanger, the refrigerant circulation path including: a discharge path for guiding the refrigerant compressed by the compressor to the first heat exchanger; and a return circuit for guiding the refrigerant from the second heat exchanger to the compressor, wherein the temperature measured by the refrigerant temperature measuring unit is the temperature of the refrigerant flow path in the first heat exchanger or the temperature of the discharge path.

In the present invention, the washing and drying integrated machine further includes an air temperature measuring unit that measures an air temperature in the washing tub, and the control unit determines that the filter is not present in the air circulation path when a temperature measured by the air temperature measuring unit or a lift degree of the temperature after a predetermined time has elapsed since the start of the drying operation is less than a predetermined threshold value.

In addition, the invention is characterized in that the washing and drying integrated machine further comprises: and a notification unit configured to notify that the filter is not present in the air circulation path when the control unit determines that the filter is not present in the air circulation path.

In the present invention, the control unit may extend the drying operation when it is determined that the filter is not present in the air circulation path.

Effects of the invention

According to the present invention, in the drying operation of the washing and drying integrated machine, the air in the washing tub is circulated so as to be taken out into the air circulation path from the take-out port and returned into the washing tub from the return port as the air blowing portion is operated. The circulated air is heated to hot air by heat exchange between the drying circulation and the heat exchanger of the heat pump, and the laundry in the washing tub is dried. The filter disposed in the air circulation path captures foreign matter from the air in the air circulation path.

The user can open first door and second door and make the first dismouting mouth of air circulation way and the second dismouting mouth of box open, dismantle the filter in the air circulation way from first dismouting mouth and second dismouting mouth outside the box and maintain. 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 the washing and drying integrated machine using the heat pump, if the drying operation is started in a state where the filter is attached to the air circulation path, the temperature of the refrigerant compressed by the compressor in the heat pump continuously increases, and therefore, the temperature of the refrigerant after a predetermined time has elapsed from the start of the drying operation or the degree of increase in the temperature becomes equal to or higher than a predetermined threshold value determined by each of the above. Therefore, in the washing and drying integrated machine, when the temperature of the refrigerant or the rising degree of the temperature measured by the refrigerant temperature measuring unit after a predetermined time has elapsed from the start of the drying operation is smaller than a predetermined threshold value, the control unit determines that there is no filter in the air circulation path. By focusing on the temperature of the refrigerant of the heat pump in this way, it is possible to determine whether or not the filter for the drying operation is attached at low cost without adopting an expensive structure for detecting whether or not the filter is attached. 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.

Furthermore, according to the present invention, a heat exchanger includes: a first heat exchanger heated by the refrigerant compressed by the compressor; and a second heat exchanger cooled by the refrigerant passing through the first heat exchanger, the refrigerant circulation path including: a discharge path for guiding the refrigerant compressed by the compressor to the first heat exchanger; and a return circuit for guiding the refrigerant from the second heat exchanger to the compressor. If the drying operation is started in a state where the filter is mounted in the air circulation path, the temperature of the refrigerant flow path and the temperature of the discharge path in the first heat exchanger tend to increase significantly, and therefore, the presence or absence of the filter mounted can be accurately determined by focusing on these temperatures.

Further, according to the present invention, in the washing and drying integrated machine, if the drying operation is started in a state in which the filter is mounted in the air circulation path, the air temperature in the washing tub continuously rises, and therefore, the air temperature after a predetermined time has elapsed from the start of the drying operation or the degree of rise in the temperature becomes equal to or higher than the predetermined threshold value. Therefore, in the washing and drying integrated machine, the control unit determines that there is no filter in the air circulation path even when the air temperature or the rising degree of the air temperature measured by the air temperature measuring unit after a predetermined time has elapsed since the start of the drying operation is smaller than a predetermined threshold value. The presence or absence of the filter can be determined at low cost by focusing on not only the temperature of the refrigerant of the heat pump but also the temperature of the air in the washing tub.

In addition, according to the present invention, in the washing and drying integrated machine, when the control unit determines that there is no filter in the air circulation path, the notification unit notifies the air circulation path of the fact, and therefore can prompt the user to attach the filter to the air circulation path.

Further, according to the present invention, the control unit extends the drying operation when it is determined that there is no filter in the air circulation path, so that the laundry in the washing tub can be completely dried even when it is difficult to dry the laundry due to the absence of the filter in the air circulation path.

Drawings

Fig. 1 is a schematic longitudinal sectional right side view of a washing and drying integrated machine according to an embodiment of the present invention.

Fig. 2 is a block diagram showing an electrical structure of the washing and drying integrated machine.

Fig. 3 is a time chart showing the change with time of the temperature at each measurement position in the drying operation of the washing and drying integrated machine in the state where the filter is attached.

Fig. 4 is a timing chart showing the change with time of the temperature at each measurement position in the drying operation in the state where the filter is not attached.

Fig. 5 is a flowchart showing the filter detection process of the first embodiment in the drying operation.

Fig. 6 is a flowchart showing filter detection processing of the second embodiment.

Fig. 7 is a flowchart showing filter detection processing of the third embodiment.

Fig. 8 is a flowchart showing a drying operation.

Description of the reference numerals

1: washing and drying integrated machine; 2: a case; 2E: a second dismounting port; 3: a washing drum; 20: an air circulation path; 20D: a take-out port; 20E: a return port; 20G: a first dismounting port; 21: an air supply unit; 25: a heat pump; 26: a compressor; 27: a heat exchanger; 27A: a first heat exchanger; 27B: a second heat exchanger; 27F: a flow path; 28: a refrigerant circulation path; 28A: a discharge path; 28B: a return circuit; 30: a control unit; 31: a first door; 32: a second door; 35: a refrigerant temperature measuring unit; 36: an air temperature measuring unit; 38: a notification unit; f2: a filter; l: and (5) washing.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a schematic longitudinal sectional right side view of a washing and drying integrated machine 1 according to an embodiment of the present invention. The direction perpendicular to the paper surface in fig. 1 is referred to as the left-right direction X of the washing and drying integrated machine 1, the left-right direction in fig. 1 is referred to as the front-rear direction Y of the washing and drying integrated machine 1, and the up-down direction in fig. 1 is referred to as the up-down direction Z of the washing and drying integrated machine 1. Of the left-right directions X, the back side of the paper surface of fig. 1 is referred to as left side X1, and the front side of the paper surface of fig. 1 is referred to as right side X2. Of the front-rear directions Y, the left side in fig. 1 is referred to as front side Y1, and the right side in fig. 1 is referred to as rear side Y2. Of the vertical directions Z, the upper side is referred to as an upper side Z1, and the lower side is referred to as a lower side Z2.

The washing and drying integrated machine 1 comprises: the washing machine comprises a box body 2, a washing cylinder 3 arranged in the box body 2, a water supply path 4 and a water discharge path 5 which are connected with the washing cylinder 3, and a water discharge filter 6 which captures foreign matters in water discharged from the washing cylinder 3 through the water discharge path 5. The washing tub 3 includes an outer tub 7 and a drum 8 accommodated in the outer tub 7. Therefore, the washing and drying integrated machine 1 is a so-called drum washing and drying integrated machine. The washing and drying integrated machine 1 includes a motor 9 for rotating the drum 8 and a drying unit 10 for drying the laundry L accommodated in the drum 8.

The case 2 is formed in a box shape. The case 2 has a front wall 2A extending vertically, a top wall 2B extending horizontally from an upper end of the front wall 2A to the rear side Y2, and a bottom wall 2C extending horizontally from a lower end of the front wall 2A to the rear side Y2. An opening 2D for communicating the inside and outside of the case 2 is formed in the front wall 2A. The front wall 2A is provided with a door 11 for opening and closing the opening 2D.

The outer tube 7 is connected to an upper end of a shock absorber 12 extending upward Z1 from the bottom wall 2C of the casing 2. Thereby, the entire washing tub 3 including the outer tub 7 and the drum 8 is elastically supported by the bottom wall 2C via the damper 12. The outer tube 7 has a cylindrical circumferential wall 7A centered on an axis J extending in the horizontal direction H in the front-rear direction Y, a disk-shaped rear wall 7B closing the hollow portion of the circumferential wall 7A from the rear side Y2, and an annular front wall 7C connected to the front end edge of the circumferential wall 7A.

The back surface wall 7B is disposed vertically and has an annular outer peripheral portion 7D and a cylindrical central portion 7E protruding rearward Y2 from the outer peripheral portion 7D. A through hole 7F penetrating the central portion 7E in the front-rear direction Y along the axis J is formed in the center of the central portion 7E. 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, a cylindrical second portion 7H protruding from the inner peripheral edge of the first portion 7G toward the front side Y1, and an annular third portion 7I protruding from the front end edge of the second portion 7H toward the axis J. An inlet 7J communicating with the hollow portion of the circumferential wall 7A from the front side Y1 is formed inside the third portion 7I. The inlet 7J is opposed to and communicates with the opening 2D of the housing 2 from the rear side Y2.

The water supply path 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 rear wall 7B of the outer tube 7. When water is supplied, water from the faucet is supplied from the water supply passage 4 into the outer tube 7. The outer tube 7 stores tap water, and water such as detergent water in which detergent is dissolved in the tap water. A water supply valve 13 that is opened and closed to start or stop water supply is provided in the middle of the water supply path 4.

The drain passage 5 is connected to a lower end portion of the outer tube 7, for example, a lower end portion of the first portion 7G of the front wall 7C. The water in the outer tube 7 is discharged from the water discharge passage 5. A drain valve 14 that is opened and closed to start or stop the drainage is provided in the middle of the drainage path 5.

The drain filter 6 is provided in the drain passage 5 upstream of the outer tube 7 than the drain valve 14. Since the front end of the drain filter 6 is exposed from the front wall 2A of the housing 2 toward the front side Y1, the user can grasp the front end of the drain filter 6 and attach and detach the drain filter 6 to and from the housing 2. The drain filter 6 can be constructed using a known structure.

The drum 8 is smaller than the outer tub 7 by one turn. The drum 8 has: a cylindrical circumferential wall 8A disposed coaxially with the circumferential wall 7A of the outer tube 7, a disk-shaped back surface wall 8B closing the hollow portion of the circumferential wall 8A from the back side Y2, and an annular ring wall 8C protruding from the front end edge of the circumferential wall 8A to the axis J side. A plurality of through holes 8D are formed in the drum 8 at least in the circumferential wall 8A, and water in the outer tube 7 passes between the outer tube 7 and the drum 8 through the through holes 8D. Thereby, the water level in the outer tub 7 coincides with the water level in the drum 8. A support shaft 15 extending to the rear side Y2 along the axis J is provided in the center of the rear surface wall 8B of the drum 8. The rear end portion of the support shaft 15 is disposed on the rear side Y2 of the rear surface wall 7B through the through hole 7F of the rear surface wall 7B of the outer tube 7.

An inlet 8E communicating with the hollow portion of the circumferential wall 8A from the front side Y1 is formed inside the annular wall 8C. The outlet 8E is opposed to and communicates with the outlet 7J of the outer tube 7 and the opening 2D of the housing 2 from the rear side Y2. The doorway 7J and the doorway 8E are opened and closed together with the opening 2D by the door 11. The user of the washing and drying integrated machine 1 throws laundry L into the drum 8 through the opened opening 2D, the inlet and outlet 7J, and the inlet and outlet 8E.

The motor 9 is disk-shaped having an outer diameter substantially equal to the central portion 7E of the rear wall 7B of the outer tube 7, and is disposed on the rear side Y2 of the central portion 7E in the case 2 and fixed to the central portion 7E. The motor 9 is coupled to a support shaft 15 provided in 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 about the axis J along with the support shaft 15. A clutch mechanism (not shown) for transmitting or shutting off 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 includes an air circulation path 20 and an air supply part 21 for circulating air in the washing tub 3, a filtering unit 22 for capturing foreign matters from the circulated air, a branching path 23 and a water filling valve 24 for maintaining the filtering unit 22, and a heat pump 25 for heating or dehumidifying the circulated air.

The air circulation path 20 is a flow path disposed around the outer tube 7 in the case 2. The air circulation path 20 has: a middle portion 20A extending in the front-rear direction Y at a position higher than the outer tube 7, a rear portion 20B extending from the rear end of the middle portion 20A to the lower side Z2, and a front portion 20C extending from the front end of the middle portion 20A to the lower side Z2. A take-out port 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 of the outer peripheral portion 7D of the rear surface wall 7B of the outer tube 7 higher than the upper limit water level, and communicates with the inside of the outer tube 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 tube 7, and communicates with the inside of the outer tube 7 from the upper side Z1. The opening of the outer peripheral portion 7D connected to the take-out port 20D is referred to as an outlet 7K, and the opening of the front wall 7C connected to the return port 20E is referred to as an inlet 7L.

The blower 21 is a blower fan, and includes a rotary blade 21A disposed in an area on the upstream side of 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 vane 21A rotates, the air in the washing tub 3, that is, the air in the outer tub 7 and the air in the drum 8 is returned to the washing tub 3 from the return port 20E, that is, the inlet 7L after being taken out into the air circulation path 20 from the take-out port 20D, that is, the outlet 7K, as indicated by thick dotted arrows. Thereby, the air in the washing tub 3 circulates in such a manner as to flow through the washing tub 3 and the air circulation path 20 in order.

The filter unit 22 is disposed in the air circulation path 20 at a region upstream of the outlet 20D of the rotary blade 21A, specifically, in the rear portion 20B. The filter unit 22 includes a single or a plurality of filters F1. The filter F1 is a dry filter composed of a mesh sheet and a frame supporting the mesh sheet. The filter F1 is disposed in a longitudinally extending 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 with the flow direction of the air in the air circulation path 20. When the air taken out from the take-out port 20D for circulation and flowing in the air circulation path 20 passes through the filter F1, foreign matter such as broken threads contained in the air is caught by the filter F1.

The branch line 23 branches from the water supply line 4 to an upstream portion of the water supply valve 13, and is connected to the filter unit 22. The water filling valve 24 is provided in the branch line 23, and is opened and closed to start or stop water filling into the filter F1 of the filter unit 22. When the water filling valve 24 is opened, water from the water supply path 4 is supplied to the filter unit 22 through the branch line 23, and is filled into the filter F1 from the upper side Z1. Thus, the foreign matter trapped by the filter F1 is peeled off from the filter F1, falls into the outer tube 7 from the take-out port 20D of the air circulation path 20, and is trapped by the drain filter 6. The foreign matter trapped by the drain filter 6 is removed when the user removes the drain filter 6 at an appropriate timing for maintenance.

The heat pump 25 includes: a compressor 26 for compressing the refrigerant, a heat exchanger 27 for exchanging heat between the refrigerant and air in the air circulation path 20, and a refrigerant circulation path 28 for circulating the refrigerant between the compressor 26 and the heat exchanger 27.

As the compressor 26, a well-known motor compressor may be employed. The compressor 26 is disposed at a position lower than the axis J, which is the rotation axis of the drum 8, for example, and is fixed to the bottom wall 2C of the casing 2.

The heat exchanger 27 is disposed in a region of the intermediate portion 20A of the air circulation path 20 downstream of the return port 20E, specifically, in a region of the front side Y1, than the rotary blade 21A of the blower 21. The heat exchanger 27 includes: a first heat exchanger 27A as a condenser on the heating side, a second heat exchanger 27B as an evaporator on the cooling side, and a capillary tube 27C connecting the first heat exchanger 27A and the second heat exchanger 27B.

In the present embodiment, the first heat exchanger 27A is disposed downstream of the second heat exchanger 27B, that is, on the front side Y1 in the intermediate portion 20A. The first heat exchanger 27A is provided with a plurality of heat radiating fins 27D, and the second heat exchanger 27B is provided with a plurality of cooling fins 27E. A refrigerant flow path 27F is provided in the first heat exchanger 27A, and a refrigerant flow path 27G is provided in the second heat exchanger 27B. The

flow paths

27F and 27G are respectively tubes made of metal such as aluminum. The plurality of heat radiating fins 27D are arranged around the flow path 27F. The plurality of cooling fins 27E are arranged around the flow path 27G. The capillary 27C connects the flow path 27F and the flow path 27G.

The refrigerant circulation path 28 is formed 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 path through which the refrigerant is taken out of the compressor 26 and then returned to the compressor 26 again through the heat exchanger 27. The refrigerant circulation path 28 includes a discharge path 28A for guiding the refrigerant compressed by the compressor 26 to the flow path 27F in the first heat exchanger 27A. The refrigerant circulation path 28 further includes a return path 28B for guiding the refrigerant flowing through the flow path 27G of the second heat exchanger 27B from the first heat exchanger 27A via the capillary tube 27C from the second heat exchanger 27B to the compressor 26. 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 washing and drying integrated machine 1 further includes a control unit 30 composed of a board on which a microcomputer with a built-in timer is mounted. The control unit 30 is electrically connected to electrical components such as the motor 9, the drying unit 10, the water supply valve 13, the drain valve 14, and the water filling valve 24 (see also fig. 2). The control part 30 performs a washing and drying operation by controlling the operations of the electric components. The washing and drying operation includes a washing process, a rinsing process, a dehydrating process, and a drying process. The drying process may also be performed outside the washing and drying operation as a separate drying operation. In the following description, the drying process and the drying operation are the same.

Before the cleaning process starts, detergent is put into the drum 8. During the washing, the control part 30 rotates the drum 8 by the motor 9 after supplying water to the outer tub 7 and the drum 8 by opening the water supply valve 13 for a prescribed time in a state where the water discharge valve 14 is closed. Thereby, the laundry L in the drum 8 is thrown and washed. In the tumbling washing, the laundry L is lifted repeatedly to a certain extent and then naturally falls down to the water surface. The detergent components contained in the detergent water stored in the drum 8 remove dirt from the laundry L by the impact generated by the tumbling. When the control unit 30 opens the drain valve 14 to drain water after a predetermined time has elapsed from the start of the rolling, the cleaning process ends.

During the rinsing process, the control part 30 rotates the drum 8 by the motor 9 after supplying water to the outer tub 7 and the drum 8 by opening the water supply valve 13 for a prescribed time in a state of closing the water discharge valve 14. In this way, the laundry L is rinsed by the tap water in the drum 8 by repeating the tumbling described above. When the control unit 30 drains water after a predetermined time has elapsed from the start of the rolling, the rinsing process ends. The rinsing process may be repeated a plurality of times. During the dehydration, the control part 30 dehydrates and rotates the drum 8 in a state where the drain valve 14 is opened. The laundry L in the drum 8 is dehydrated by centrifugal force generated by the dehydration rotation of the drum 8. The water oozed out of the laundry L by the dehydration is discharged from the water discharge path 5 to the outside of the machine. The dewatering process may be performed not only after the rinsing process but also after the washing process.

During the drying process, the control unit 30 causes the air blowing unit 21 and the compressor 26 of the heat pump 25 to operate to generate hot air, and circulates the hot air between the drum 8 and the air circulation path 20 to supply the hot air to the laundry L in the drum 8. Specifically, in the heat pump 25, the refrigerant is compressed by the compressor 26 to be at a high temperature and a high pressure, and then, radiates 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 to a high temperature by heat radiation of the refrigerant passing through the flow path 27F. The refrigerant passing through the first heat exchanger 27A is depressurized to a low temperature while passing through the capillary tube 27C, and then cools the cooling fin 27E while passing through the flow path 27G in the second heat exchanger 27B.

The air in the air circulation path 20 during drying is dehumidified while passing around the cooling fins 27E of the second heat exchanger 27B in the air circulation path 20. The dehumidified air is heated to become hot air when passing around the heat radiating fins 27D of the first heat exchanger 27A. That is, the air in the air circulation path 20 is changed into hot air by heat exchange with the refrigerant flowing through the first heat exchanger 27A. The hot air flows into the tub 7 from the inlet 7L of the tub 7 and is supplied to the laundry L in the drum 8, thereby drying the laundry L. At this time, the control unit 30 may operate the motor 9 to rotate the drum 8. This allows the laundry L to be blown with hot air without dead space.

The foreign matter such as broken threads flows along with the hot air during the drying process, and is caught by the filter F1 of the filter unit 22 as described above. At an appropriate timing during or after the drying process, as a maintenance process, the control unit 30 opens the water filling valve 24 to fill water into the filter F1, and removes foreign matter from the filter F1.

The washing and drying integrated machine 1 further includes a filter F2 for capturing foreign matters not captured by the filter F1 in the air circulation path 20. There are single or multiple filters F2. The filter F2 is a dry filter composed of a mesh sheet and a frame supporting the mesh sheet, similarly to the filter F1. The filter F2 is disposed, for example, between the rotary blade 21A of the blower 21 and the heat exchanger 27 in the intermediate portion 20A of the air circulation path 20. The filter F2 is disposed in a manner intersecting the air flowing through the air circulation path 20, for example, in a longitudinally extending posture. When a plurality of filters F2 are provided, these filters F2 are arranged so as to overlap with the flow direction of the air in the air circulation path 20.

The filter F1 is automatically maintained without being removed as described above, but the filter F2 is periodically maintained with being removed. Therefore, the top wall 20F in the intermediate portion 20A of the air circulation path 20 is provided with a first attachment/detachment port 20G facing the filter F2 from the upper side Z1. A second attachment/detachment port 2E is provided in the top wall 2B of the case 2 at a position directly above the first attachment/detachment port 20G. The first attachment/detachment port 20G and the second attachment/detachment port 2E are openings each having a size through which the filter F2 passes.

The washing and drying integrated machine 1 further includes a first door 31 that opens and closes the first attachment and detachment port 20G, and a second door 32 that opens and closes the second attachment and detachment port 2E. The first door 31 is coupled to the top wall 20F of the air circulation path 20 via a hinge 33, for example, and is rotatable about the hinge 33. The second door 32 is also coupled to the top wall 2B of the cabinet 2 via, for example, the hinge portion 34, and is rotatable about the hinge portion 34.

The user can open 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 take out the filter F2 in the air circulation path 20 from the air circulation path 20 to the outside of the casing 2 through the first attachment/detachment port 20G and the second attachment/detachment port 2E, thereby performing maintenance such as cleaning of the filter F2. 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 to close the first attachment/detachment port 20G and the second attachment/detachment port 2E. Thereby, the attachment of the filter F2 to the air circulation path 20 is completed. A positioning portion (not shown) for positioning the filter F2 is provided in the air circulation path 20. The first door 31 and the second door 32 may be integrated into one door that opens and closes the first attachment/detachment port 20G and the second attachment/detachment port 2E at the same time. That is, one of the first door 31 and the second door 32 may double as the other.

Hereinafter, the filter F2 positioned at a predetermined attachment position in the air circulation path 20 so as to intersect the air flowing through the air circulation path 20 in a state where the first attachment/detachment port 20G and the second attachment/detachment port 2E are closed is referred to as a filter F2 attached to the air circulation path 20. On the other hand, the filter F2 located 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-attached state. When the filter F2 is not present in the air circulation path 20, the first attachment/detachment port 20G and the second attachment/detachment port 2E may be closed or opened.

In the case of the filter F2 that can be detached from the air circulation path 20 to the outside of the case 2 in this way, it is assumed that the user forgets to return the detached filter F2 to the air circulation path 20. When the drying operation is performed in a state where the filter F2 is not provided in the air circulation path 20, heat exchange between the heat exchanger 27 and the air in the air circulation path 20 is slowed down due to the foreign matter adhering to the heat exchanger 27 or the like, and thus, the drying efficiency of the laundry L may be lowered. Further, if the first and second attachment/

detachment ports

20G and 2E are opened at all times, air in the air circulation path 20 leaks from these attachment/detachment ports, and the amount of hot air supplied from the air circulation path 20 to the laundry L is reduced, and thus the drying efficiency of the laundry L may be further lowered. If the drying efficiency of the laundry L is lowered, it takes time until the drying of the laundry L is completed, and thus, power consumption and drying operation may be increased.

As described above, although the filter F2 needs to be attached to the air circulation path 20 during the drying operation, the user cannot visually confirm whether the filter F2 is present in the air circulation path 20 from outside the washing and drying integrated machine 1 in a state where the first door 31 and the second door 32 are closed. Therefore, the control section 30 performs a filter detection process of detecting the presence or absence of the filter F2 in the air circulation path 20 during the drying process. In connection with the filter detection process, the washing and drying integrated machine 1 further includes: a refrigerant temperature measuring unit 35 for measuring the temperature of the refrigerant compressed by the compressor 26 in the heat pump 25, an air temperature measuring unit 36 for measuring the air temperature in the washing tub 3, a ammeter 37 for measuring the current value flowing through the motor 21B of the blower 21, and a notification unit 38 (see also fig. 2).

The refrigerant temperature measuring unit 35 includes a first thermometer 41, a second thermometer 42, and a third thermometer 43 each of which is a thermistor. The first thermometer 41 is mounted on the discharge path 28A of the heat pump 25, and measures the surface temperature of the discharge path 28A. The surface temperature of the discharge path 28A is almost the same as the temperature of the refrigerant flowing in the discharge path 28A, and is therefore regarded as the temperature of the refrigerant. The first thermometer 41 may be exposed to the discharge path 28A to measure the temperature of the refrigerant itself in the discharge path 28A.

The second thermometer 42 is mounted on the middle portion of the flow path 27F of the first heat exchanger 27A of the heat pump 25, that is, the condenser, and measures the surface temperature of the middle portion. The surface temperature of the flow path 27F is almost the same as the temperature of the refrigerant flowing in the flow path 27F, and is therefore regarded as the temperature of the refrigerant. The second thermometer 42 may be exposed to the flow path 27F to measure the temperature of the refrigerant itself in the flow path 27F.

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

Hereinafter, the temperature measured by the first thermometer 41 will be referred to as "the temperature of the discharge path 28A", the temperature measured by the second thermometer 42 will be referred to as "the intermediate temperature of the first heat exchanger 27A", and the temperature measured by the third thermometer 43 will be referred to as "the inlet temperature of the second heat exchanger 27B". The measurement results of the first thermometer 41, the second thermometer 42, and the third thermometer 43, that is, "the temperature of the discharge path 28A", "the intermediate temperature of the first heat exchanger 27A", and "the inlet temperature of the second heat exchanger 27B", are input to the control unit 30 in real time, respectively.

The air temperature measuring unit 36 includes a fourth thermometer 44 and a fifth thermometer 45 each of which is composed of a thermistor. The fourth thermometer 44 is mounted near the outlet 7K of the outer tube 7, and measures the air temperature in the outlet 7K. The fifth thermometer 45 is mounted near the inlet 7L of the outer tube 7, and measures the air temperature in the inlet 7L. Hereinafter, the temperature measured by the fourth thermometer 44 is referred to as "outlet temperature of the outer tube 7", and the temperature measured by the fifth thermometer 45 is referred to as "inlet temperature of the outer tube 7". The measurement results of the fourth thermometer 44 and the fifth thermometer 45, that is, "the outlet temperature of the outer tube 7" and "the inlet temperature of the outer tube 7", are input to the control unit 30 in real time, respectively.

As the ammeter 37, a known ammeter can be employed. 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 casing 2, or may be a buzzer built in the casing 2.

Fig. 3 is a timing chart showing the change with time of the temperature at each measurement position in the drying operation in the state where the filter F2 is incorporated in the air circulation path 20. Fig. 4 is a time chart showing the time-dependent change in temperature of each measurement position during the drying operation with the filter F2 removed from the air circulation path 20. In the timing charts of fig. 3 and 4, the horizontal axis represents the elapsed time, and the vertical axis represents 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 tube 7", and "the inlet temperature of the outer tube 7", respectively. The unit of elapsed time is "minutes" and the unit of temperature is "degrees".

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

Fig. 3 shows the measurement result during the drying operation started in the state where the filter F2 is mounted in 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 tube 7, and the inlet temperature of the outer tube 7 are unstable within 10 minutes from the start of the drying operation, but rise with the operation of the blower 21 and the heat pump 25 after 10 minutes from the start of the drying operation. Therefore, these temperatures are indicators showing the state of the drying operation. Further, since the intermediate temperature of the first heat exchanger 27A and the temperature of the discharge passage 28A are also indicators indicating the state of the compressor 26, when these temperatures reach a predetermined upper limit value, the control unit 30 stops the drying operation to protect the compressor 26.

Fig. 4 shows measurement results during a drying operation started in a state where the filter F2 is not present 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 casing 2 are opened. When the user forgets to return the filter F2 to the air circulation path 20 and starts the drying operation directly, the temperature of the discharge path 28A and the intermediate temperature of the first heat exchanger 27A rise within 30 minutes from the start of the drying operation, but are saturated and do not rise again after 30 minutes from the start of the drying operation. In this case, the temperature of the discharge passage 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 is not reached at 20 degrees.

Further, although the outlet temperature of the outer tub 7 and the inlet temperature of the outer tub 7 rise within 20 minutes from the start of the drying operation, these temperatures are saturated and do not rise any more after 20 minutes from the start of the drying operation because the inlet and outlet of the outside air to the first and second attaching and detaching

ports

20G and 2E occur. In this case, the inlet temperature of the outer tube 7 does not reach 55 degrees, and the outlet temperature of the outer tube 7 does not reach 30 degrees.

As described above, the respective change characteristics of the temperature of the discharge passage 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 tube 7, and the inlet temperature of the outer tube 7 are different depending on the presence or absence of the filter F2 in the air circulation passage 20. In particular, in the washing and drying integrated machine 1 using the heat pump 25, if the drying operation is started in a state where the filter F2 is mounted in the circulation path 20, the temperature of the refrigerant compressed by the compressor 26 in the heat pump 25 continuously increases. Therefore, the temperature of the refrigerant after a predetermined time has elapsed from the start of the drying operation or the degree of rising of the temperature is equal to or greater than a predetermined threshold value described later. Therefore, the control unit 30 executes the filter detection process mainly using the change characteristics of the refrigerant.

Fig. 5 is a flowchart showing the filter detection process of the first embodiment in the drying operation. When the above-described predetermined time of 30 minutes has elapsed since the start of the drying operation (yes in step S1) while utilizing the characteristic of the change in the intermediate temperature of the first heat exchanger 27A, the control unit 30 measures the intermediate temperature of the first heat exchanger 27A (step S2). If the measured value is equal to or greater than the threshold value of 60 degrees (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 continues the drying operation. The threshold value is obtained in advance from the change characteristic (see fig. 3) of the intermediate temperature of the first heat exchanger 27A and stored in a memory (not shown) of the control unit 30. The same applies to other thresholds described later.

On the other hand, if the correlation measurement value of the intermediate temperature of the first heat exchanger 27A is smaller than the threshold value (no in step S3), the control unit 30 determines that the filter F2 is not present in the air circulation path 20, and notifies that the filter F2 is not present in the air circulation path 20 by the notification unit 38 (step S4). Then, the control unit 30 ends the filter detection process and continues the drying operation.

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

Fig. 6 is a flowchart showing a filter detection process of the second embodiment in the drying operation. When the above-described predetermined time of 30 minutes has elapsed since the start of the drying operation (yes in step S11) while utilizing the characteristic of the change in the intermediate temperature of the first heat exchanger 27A, the control unit 30 measures the predetermined time of the intermediate temperature of the first heat exchanger 27A (step S12). Then, the control unit 30 calculates Δt indicating the degree of increase in the intermediate temperature of the first heat exchanger 27A within 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 equal to or greater than the threshold value of 1 degree/min (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 continues the drying operation. On the other hand, if the measured value is smaller than the threshold value (no in step S14), the control unit 30 determines that the filter F2 is not present in the air circulation path 20, and notifies that the filter F2 is not present in the air circulation path 20 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 in the case of using the change characteristic of the temperature of the discharge path 28A, the control unit 30 also executes the processes of steps S11 to S15, but the threshold value in step S14 is set to a value obtained according to the change characteristic of the temperature of the discharge path 28A. The same applies to the filter detection process in the case of using the variation characteristic of the inlet temperature of the second heat exchanger 27B.

In the drying operation, the control unit 30 may execute only the filter detection processing of either one of the first and second embodiments, or may execute the filter detection processing of both embodiments in parallel. In other words, when the temperature measured by the refrigerant temperature measuring unit 35 after the lapse of the predetermined time from the start of the drying operation or the rising degree Δt of the temperature is smaller than the predetermined threshold value, the control unit 30 determines that the filter F2 is not present in the air circulation path 20 (steps S4 and S15). By focusing on the temperature of the refrigerant in the heat pump 25 in this way, it is possible to accurately determine whether the filter F2 for the drying operation is attached at low cost without using an expensive sensor or the like for detecting the presence or absence of the filter F2.

In particular, if the drying operation is started in a state where the filter F2 is incorporated in the air circulation path 20, the intermediate temperature of the first heat exchanger 27A and the temperature of the discharge path 28A tend to be significantly and continuously increased as compared with the inlet temperature of the second heat exchanger 27B (see fig. 3). Accordingly, the presence or absence of the attached filter F2 can be accurately determined by focusing on these temperatures.

When the control unit 30 determines that the filter F2 is not present in the air circulation path 20, the notification unit 38 notifies that the filter F2 is not present in the air circulation path 20 (steps S4 and S15). Thereby, the user can be prompted to attach the filter F2 to the air circulation path 20.

As described above, in the washing and drying integrated machine 1, if the drying operation is started in a state where the filter F2 is attached to the air circulation path 20, the circulated air is repeatedly heated by the heat exchanger 27, and the temperature of the air in the washing tub 3 continuously rises (see fig. 3). Thus, the air temperature after a predetermined time has elapsed from the start of the drying operation or the degree of rise in the temperature is equal to or greater than a predetermined threshold value.

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

When the temperature measured by the air temperature measuring unit 36 after the lapse of the predetermined time from the start of the drying operation or the rising degree Δt of the temperature is smaller than the predetermined threshold value, the control unit 30 may determine that the filter F2 is not present in the air circulation path 20. By focusing on the temperature of the refrigerant of the heat pump 25 and the temperature of the air in the washing tub 3 as described above, it is possible to determine whether the filter F2 is attached or not at low cost.

If the filter F2 is not provided in the air circulation path 20, the air resistance in the air circulation path 20 decreases, and therefore, the current value of the motor 21B of the blower 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 of the third embodiment.

Fig. 7 is a flowchart showing a filter detection process of the third embodiment in the drying operation. When a predetermined time, for example, 10 minutes has elapsed from the start of the drying operation, the rotation speed of the motor 21B is stabilized at, for example, 5000rpm. In this case (yes in step S21), the control unit 30 measures the current value of the motor 21B in the continuous operation by the ammeter 37 (step S22). If the measured value is smaller than the threshold value of 290mA, for example (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. On the other hand, if the measured value is equal to or greater than the threshold value (yes in step S23), the control unit 30 determines that the filter F2 is not present in the air circulation path 20, and notifies that the filter F2 is not present in the air circulation path 20 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 a drying operation. In the drying operation, the control section 30 executes the filter detection process of at least any one of the first and second embodiments described above, but the filter detection process of the third embodiment may also be executed in parallel (step S31). When the control unit 30 determines that the filter F2 is not present in the air circulation path 20 in the filter detection process (yes in step S32), it 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 from the operation time set initially by, for example, 30 minutes. The first 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 judgment reference temperature capable of judging the drying end of the laundry L. As the drying end judgment reference temperature, there may be mentioned an upper limit (high limit) temperature with respect to the outlet temperature of the outer tube 7, and a temperature difference judgment temperature with respect to the difference between the outlet temperature of the outer tube 7 and the inlet temperature of the outer tube 7. When the outlet temperature of the outer tub 7 rises to the upper limit temperature or the difference between the outlet temperature of the outer tub 7 and the inlet temperature of the outer tub 7 is small to the temperature difference determining temperature, it can be determined that the drying of the laundry L is finished. As an example of the extension process, the control unit 30 sets the upper limit temperature to be higher than the initial upper limit temperature by, for example, 3 degrees or sets the temperature difference determination temperature to be lower than the initial temperature difference determination temperature by, for example, 3 degrees. The first temperature difference determination temperature is set in accordance with the amount of laundry L at the start of the washing operation or the like. When the drying end judgment reference temperature is changed by the extension processing in this way, the operation time of the drying operation is substantially extended.

When the operation end condition is satisfied (yes in step S34), the control unit 39 ends the drying operation, regardless of the presence or absence of the extension process. The case where the operation end condition is satisfied refers to the case where the operation time elapses, the case where the outlet temperature of the outer tube 7 rises to the upper limit temperature, and the case where the difference between the outlet temperature of the outer tube 7 and the inlet temperature of the outer tube 7 is small to the temperature difference determination temperature.

In this way, when the control unit 30 determines that the filter F2 is not present in the air circulation path 20 (yes in step S32), the drying operation is prolonged (step S33). Therefore, even in the case where the laundry L in the drum 3 is not easily dried due to the absence of the filter F2 in the air circulation path 20, the laundry L can be completely dried.

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

For example, the filter unit 22 including the filter F1, the branching pipe 23 related to maintenance of the filter F1, and the water injection valve 24 (see fig. 1) may be omitted.

In the above embodiment, the presence or absence of the filter F2 in the air circulation path 20 is detected mainly based on the temperature of the refrigerant. Even if the filter F2 is present in the air circulation path 20, if the temperature change characteristics of the refrigerant are significantly different depending on whether the filter F2 is located at the above-described attachment position, it is also possible to detect whether the filter F2 is located at the attachment position in the air circulation path 20 depending on the temperature of the refrigerant. Thus, whether the filter F2 is properly attached to the air circulation path 20 can be determined, and the user can be urged to reattach the filter F2 by the notification of the notification portion 38 as needed.

In the above embodiment, as the main filter detection process, the filter detection process based on the temperature of the refrigerant is performed. In contrast, the filter detection process according to the third embodiment of the current value of the motor 21B of the blower 21 and the filter detection process according to the third embodiment of the current value of the motor may be separately executed as the main filter detection process.

In the drum-type washing and drying integrated machine 1 according to the above embodiment, the washing tub 3 may be disposed so that the axis J is inclined in the horizontal direction H. The washing and drying integrated machine 1 may be a vertical washing and drying integrated machine in which the axis J extends longitudinally.

Claims

The utility model provides a washing and drying all-in-one which characterized in that includes:

a case;

a washing cylinder configured in the box body for accommodating washings;

an air circulation path which is disposed in the case and includes a discharge port and a return port connected to the washing tub;

an air supply unit configured to circulate air in the washing tub by taking out the air from the take-out port into the air circulation path and returning the air from the return port into the washing tub;

a heat pump, comprising: a compressor for compressing a refrigerant; a heat exchanger disposed in the air circulation path and configured to exchange heat between a refrigerant and air in the air circulation path; and a refrigerant circulation path for circulating a refrigerant between the compressor and the heat exchanger;

A filter disposed in the air circulation path and configured to capture foreign matter from air in the air circulation path;

a refrigerant temperature measuring unit for measuring a temperature of the refrigerant compressed by the compressor;

a control unit for controlling the air supply unit and the heat pump to perform a drying operation for drying the laundry in the washing tub;

a first door for opening and closing a first attachment/detachment port provided in the air circulation path; and

a second door for opening and closing a second dismounting opening arranged on the box body,

the filter can be detached from the air circulation path to the outside of the case through the first and second attaching/detaching ports,

when the temperature measured by the refrigerant temperature measuring unit or the degree of rising of the temperature after a predetermined time has elapsed from the start of the drying operation is smaller than a predetermined threshold value, the control unit determines that the filter is not present in the air circulation path.
The washing and drying integrated machine according to claim 1, wherein,

the heat exchanger includes: a first heat exchanger that is heated by a refrigerant compressed by the compressor; and a second heat exchanger cooled by the refrigerant passing 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 circuit for guiding the refrigerant from the second heat exchanger to the compressor,

the temperature measured by the refrigerant temperature measuring unit is a temperature of a flow path of the refrigerant in the first heat exchanger or a temperature of the discharge path.
The washing and drying integrated machine according to claim 1 or 2, wherein,

further comprises: an air temperature measuring unit for measuring the air temperature in the washing cylinder,

when the temperature measured by the air temperature measuring unit or the degree of rising of the temperature after a predetermined time has elapsed from the start of the drying operation is smaller than a predetermined threshold value, the control unit also determines that the filter is not present in the air circulation path.
The washing and drying integrated machine according to any one of claim 1 to 3, wherein,

further comprises: and a notification unit configured to notify that the filter is not present in the air circulation path when the control unit determines that the filter is not present in the air circulation path.
The washing and drying integrated machine 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 present in the air circulation path.