CN109629168B

CN109629168B - Washing and drying machine

Info

Publication number: CN109629168B
Application number: CN201811024699.XA
Authority: CN
Inventors: 川村圭三; 山本哲也; 立山卓也; 金泽幸久; 石川史人; 佐野壮一
Original assignee: Hitachi Global Life Solutions Inc
Current assignee: Hitachi Global Life Solutions Inc
Priority date: 2017-10-06
Filing date: 2018-09-04
Publication date: 2021-10-22
Anticipated expiration: 2038-09-04
Also published as: TW201915256A; JP2019068895A; TWI660095B; JP6956582B2; CN109629168A

Abstract

The invention provides a washing dryer, which eliminates a water seal structure for preventing water leakage caused by water pressure in a water barrel during the assembly and disassembly of a drying filter, reduces the cost, inhibits the increase of water used in washing and drying, and automatically cleans the drying filter. The method comprises the following steps: an outer barrel with an inner part serving as a drying chamber during drying; a drum or inner tub rotatably disposed in the outer tub and capable of accommodating laundry; a motor for driving the drum or the inner tub; a case supporting the outer tub; and a drying device provided in the cabinet, having a fan and a heating unit, blowing warm air from a blow-out nozzle to the laundry in the drum or the inner tub, and circulating the warm air to the fan through a ventilation opening through which air in the outer tub flows and a dehumidifying mechanism, wherein a drying filter is provided between the dehumidifying mechanism and the fan, and the drying filter is cleaned when water is supplied into the outer tub. The dry filter is arranged at a position higher than the water level of the water supplied to the outer barrel. The water for cleaning the filter is supplied to the outer tub.

Description

Washing and drying machine

Technical Field

The present invention relates to a washing and drying machine of a unit for drying clothes on a substrate.

Background

A washing and drying machine, which continuously performs a process from washing to drying, is provided with a drying filter that collects soft fibers such as lint generated when drying laundry.

Patent documents

1 and 2 are known as automatic cleaning techniques for soft fibers collected in a dry filter.

Patent document 1 describes "that: supporting the water tub by a suspension; a dehydration barrel which is arranged at the inner side of the barrel, is controlled by a driving motor in a rotatable way by taking a horizontal axis as a center and is provided with a dehydration hole; a dry air circulation passage which is connected to and communicated with a dry air inlet provided on one side of the dehydration barrel and a dry air outlet provided on the other side of the dehydration barrel, respectively, and through which the generated dry air flows; a filter which is provided on the suction port side of the dry air circulation passage communicating with the dry air supply port and removes lint and the like; and a clogging removing means for removing clogging of the filter, wherein the filter provided on the suction side of the drying air circulation passage is disposed at a position below the water surface of the washing water and receiving the water flow when the spin tub rotates ". Patent document 2 discloses a drum-type washing and drying machine in which a tub for accommodating a drum, an air supply fan for blowing warm air into the drum, a drying filter, a heater, and a dehumidifier are provided in a casing main body, wherein the drying filter constituting a drying filter case is horizontally disposed, an air supply inlet and an air supply outlet are disposed so that the air supply from the air supply fan is changed from a lower surface portion of the drying filter to an upper surface portion, a discharge path is provided in the lower surface portion, and a cleaning water shower port is provided in the upper surface portion.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 8-243292

Patent document 2: japanese laid-open patent publication No. 2009-142351

Disclosure of Invention

Problems to be solved by the invention

However, in the case of adopting a structure in which the filter described in patent document 1 is disposed at a position under the water surface of the washing water to receive the water flow when the spin-drying tub rotates, and the filter is attached and detached for maintenance, a water seal portion for preventing water leakage due to the water pressure in the tub needs to be provided, which increases the attachment and detachment cost. Further, the dry filter described in patent document 2 is located downstream of the dehumidifier and the blower fan, and the cleaning water used for cleaning the dry filter is directly discharged after cleaning, which causes a problem of an increase in the cost of the cleaning water used for cleaning the filter.

Accordingly, an object of the present invention is to provide a washing and drying machine which eliminates a water seal structure for preventing water leakage due to water pressure in a water tub during attachment and detachment of a drying filter, reduces costs, suppresses an increase in the amount of water used for washing and drying, and automatically cleans the drying filter.

Means for solving the problems

In order to solve such a problem, as an example, the washing and drying machine of the present invention includes: an outer barrel which becomes a drying chamber when drying; a drum or inner tub rotatably disposed in the outer tub and capable of accommodating laundry; a motor for driving the drum or the inner tub; a box body for supporting the outer barrel; and a drying device provided in the cabinet, having a fan and a heating unit, for blowing warm air from an air outlet to the laundry in the drum or the inner tub, and circulating the warm air to the fan through a vent through which air in the outer tub flows and a dehumidifying means, wherein a filter is provided between the dehumidifying means and the fan, and the filter is cleaned when water is supplied into the outer tub.

Effects of the invention

According to the washing and drying machine of the present invention, it is possible to provide a washing and drying machine which eliminates a water seal structure provided by attaching and detaching a drying filter, reduces the cost, suppresses an increase in the amount of water used for washing and drying, and automatically cleans the drying filter.

Drawings

Fig. 1 is a perspective view showing an external appearance of a drum type washing and drying machine according to embodiment 1 of the present invention.

Fig. 2 is a schematic cross-sectional view of a washing and drying machine according to embodiment 1 of the present invention, showing the flow of washing water when washing water is supplied.

Fig. 3 is a schematic cross-sectional view showing an internal structure of a drum-type washing and drying machine according to embodiment 1 of the present invention, and showing an air flow in a drying process.

Fig. 4 is a flowchart showing a part of a control process executed by the control device of the drum-type washing and drying machine according to embodiment 1 of the present invention.

FIG. 5 is a flowchart showing another part of the control process executed by the control device of the drum-type washing and drying machine according to embodiment 1 of the present invention

Fig. 6 is a schematic cross-sectional view of a washing and drying machine according to embodiment 2 of the present invention, showing the flow of washing water during supply of washing water.

Fig. 7 is a schematic cross-sectional view of a washing and drying machine according to embodiment 3 of the present invention, showing the flow of washing water during supply of washing water.

Fig. 8 is a schematic cross-sectional view of a washing and drying machine according to embodiment 3 of the present invention, showing an air flow of air in a drying process.

1 case body

1a side plate

1c front cover

1d rear cover

1e Upper cover

1f lower front cover

1h base

2 outer barrel

2c ventilation opening

2d outer barrel cover

2f water receiving part

3 washing and dewatering barrel (inner barrel)

3a opening part

3b lifting part

3c fluid balancer

3d Flange

4 electric motor

4a rotating shaft

5 shock absorber

6 operating panel

7 detergent tray

8 drying filter

8a drying filter box body

9 door

9d door opening button

10 corrugated pipe

12. 13 operating button

14 display

16 water supply hose connector

17 water suction hose connector

21. 22 drainage outlet

23 drainage bent pipe (drain trap)

24 circulation pump

24a, 24b, 24c circulating hose

25 drainage valve

26 drainage hose

27 thread scrap filter

28 Fan

29 drying duct

29a bellows

30 warm air pipeline

30a corrugated pipe

31 heater

32 blowout nozzle

33 floor surface

36 washing article

37 front reinforcement

38 control device

39 power switch

40 Fan Unit

41 Fan case (fan case)

43 Warm air

44 air suction valve

44a air intake duct

45 air vent

46 outside air

47. 48 air inside the cabinet

51 Cooling water supply pipe

52 cooling water

53 cleaning nozzle

54 washing water

54a washing water

S-drum type washing and drying machine

Detailed Description

Hereinafter, a drum-type washing and drying machine according to embodiment 1 of the present invention will be described with reference to the drawings as appropriate. Fig. 1 is a perspective view showing an external appearance of a drum type washing and drying machine S according to embodiment 1 of the present invention. Fig. 2 is a schematic cross-sectional view of the drum-type washing and drying machine S of fig. 1, in which a side plate of a cabinet is removed to show an internal structure thereof, and a flow of washing water during washing water supply is shown. Fig. 3 is a schematic cross-sectional view of a washing and drying machine according to embodiment 1 of the present invention, showing an air flow of air in a drying process. Fig. 4 is a flowchart showing a part of the control process executed by the control device of the drum-type washing and drying machine S of fig. 1. Fig. 5 is a flowchart showing another part of the control process executed by the control device of the drum-type washing and drying machine S of fig. 1.

The casing 1 constituting the outer contour is mounted on a base 1h and is composed of a side plate 1a, a front cover 1c, a rear cover 1d, an upper cover 1e, and a lower front cover 1 f. The left and right side plates 1a are coupled to each other by an コ -shaped upper reinforcement (not shown), a front reinforcement 37, and a rear reinforcement (not shown), and form a box-shaped box 1 including a base 1 h.

A door 9 for closing an inlet for putting in and taking out the laundry 36 is provided substantially at the center of the front cover 1c, and is supported openably and closably by a hinge (not shown) provided in the front reinforcement 37. By pressing the door opening button 9d, a lock mechanism (not shown) is released to open the door, and the door 9 is pressed against the front cover 1c to be locked and closed. The front reinforcement 37 has a circular opening for putting in and taking out laundry 36 concentrically with an opening of the tub 2 described later.

The operation panel 6 provided at the center of the upper portion of the case 1 includes a power switch 39,

operation buttons

12, 13, and a display 14. The operation panel 6 is electrically connected to a control device 38 provided in the lower portion of the case 1. A pull-out type detergent tray 7 into which detergent, softener, and the like are put is provided on the left side of the operation panel 6. A filter-drier case 8a is provided on the right side of the upper cover 1 e. The filter-drier case 8a is provided with a mesh type filter drier 8 to remove thread waste and the like. The upper lid 1e is provided with a water supply hose connection port 16 connected to a faucet and a water suction hose connection port 17 for the remaining hot water in the bathtub. On the rear side of the pull-out type detergent tray 7, water supply-related components such as a water supply solenoid valve (not shown), a bathtub water suction pump (not shown), and a water level sensor (not shown) are provided.

The drum-shaped washing and dehydrating tub (drum as an inner tub) 3 rotatably supported has a large number of through holes (not shown) for water passage and ventilation in its outer peripheral wall and bottom wall, and an opening 3a for putting in and taking out the laundry 36 is provided in its front end surface. A fluid balancer 3c integrated with the washing and dehydrating tub 3 is provided outside the opening 3 a. The fluid balancer 3c functions to: the fluid with large specific gravity is sealed in the washing and dehydrating tub 3, and when the laundry 36 is deflected to one side and eccentric is generated when the washing and dehydrating tub rotates, the eccentricity is eliminated by the movement of the fluid in the fluid balancer 3c, and the balance of the rotation is maintained. A plurality of lifters 3b extending in the depth direction (axial direction) are provided on the inner peripheral wall of the washing and dehydrating tub 3. When the washing and dehydrating tub 3 rotates during washing and drying, the laundry 36 and the like repeatedly rise along the peripheral wall with the lifting unit 3b by centrifugal force and fall by gravity. The rotation center axis of the washing and dehydrating tub 3 is inclined so as to be horizontal or the opening side is raised.

The cylindrical outer tub 2 coaxially contains a washing and dehydrating tub 3, has an open front surface, and has a motor 4 mounted at the outer center of the rear end surface. The rotation shaft 4a of the motor 4 penetrates the outer tub 2 and is coupled to a metal flange 3d provided on the back surface of the washing and dehydrating tub 3. A tub cover 2d capable of storing water into the tub 2 is provided at an opening portion of the front surface. A rubber bellows 10 is attached to an opening of the tub cover 2d, and the tub 2 is water-sealed by closing the door 9. The tub 2 is supported by a damper 5 having a lower side fixed to the base 1 h.

A concave water receiving portion 2f is provided on the inner peripheral surface of the bottom side of the outer tub 2. The bottom surface of the water receiving portion 2f is an inclined surface that decreases from the front side to the rear side, and a drain port 21 is provided on the rear side of the water receiving portion 2f to which a drain hose 26 is connected.

A lint filter 27 and a drain valve 25 are provided in the middle of the drain hose 26, water is accumulated in the tub 2 by closing the drain valve 25 to supply water, and the water in the tub 2 is discharged to the outside of the machine by opening the drain valve 25. A circulation pump 24 is provided in the lower part of the outer tub 2, and a

circulation hose

24a, 24b, 24c is provided, and the storage member in the outer tub 2 has a function of circulating the stored water. When the motor (not shown) of the circulation pump 24 rotates in the forward direction with the drain valve 25 closed, the washing water in the outer tub 2 flows into the circulation pump 24 through the drain port 21, the lint filter 27 and the circulation hose 24a, and is sent into the circulation hose 24b from the drain port (not shown), and the washing and dewatering tub 3 is drained.

On the other hand, when the motor (not shown) of the circulation pump 24 rotates in the reverse direction, the washing water in the outer tub 2 enters the circulation pump 24 through the lint filter 27 from the drain port 21 and the circulation hose 24a, flows into the circulation hose 24c from the drain port (not shown), returns to the water receiving portion 2f, and circulates.

The drying duct 29 is provided on the inner side of the rear surface of the cabinet 1, and is connected to a ventilation opening 2c provided in the rear part of the outer tub 2 via a bellows hose 29a made of rubber. A cooling water supply pipe 51 as a dehumidifying means is built in the drying duct 29. A fan unit 40 is provided at an upper portion of the cabinet 1, and a heater 31 and a fan 28 of the fan unit 40 blow a warm air 43 into the washing and dehydrating tub 3 during the drying operation. A drying filter 8 for collecting lint during a drying operation is provided between the fan unit 40 and the drying duct 29. The dry filter 8 is built in the dry filter case 8a, and can be pulled out to a position above the upper cover 1e during maintenance. A cleaning nozzle 53 for cleaning the dry filter 8 is provided on the downstream side of the dry filter 8.

Next, the controller 38 will be explained. The control device 38 includes a microcomputer, a drive circuit, and the like, and also includes an input circuit for on/off signals of the

operation buttons

12 and 13 shown in fig. 1 and output signals from various sensors, and the like. The microcomputer receives various information signals from the user in the operation, washing step, and drying step. The microcomputer is connected to the motor 4, a water supply solenoid valve (not shown), the drain valve 25, the fan unit 40, and the like via a drive circuit, and controls opening, closing, rotation, and energization thereof. In addition, in order to notify the user of information about the drum washing and drying machine S, a display 14, a buzzer (not shown), and the like are also controlled.

Fig. 4 is a flowchart showing a part of the control process executed by the control device 38 of the drum-type washing and drying machine S of fig. 1. Fig. 5 is a flowchart showing another part of the control process executed by the control device 38 of the drum-type washing and drying machine S of fig. 1.

As shown in fig. 4, when power switch 39 (see fig. 1) is turned on by the user' S operation, control device 38 checks the state of drum-type washing/drying machine S and performs initial setting of drum-type washing/drying machine S (step S101).

The control device 38 sets a washing program according to the operation of the operation button 13 by the user (step S102).

Next, in step S103, the control device 38 monitors an instruction input from the operation button 12 as a start switch of the operation panel 6, and confirms the presence or absence of a start switch signal. If not confirmed (if "none" at step S103), step S103 is repeated. Then, when the start switch signal is confirmed (in the case of "yes" at step S103), the controller 38 proceeds to step S104 to execute the process of detecting the amount of detergent.

In the detergent amount detection, when the washing and dehydrating tub 3 is rotated in one direction in a dry state before the supply of the washing water, the mass of the laundry 36 is detected based on the integrated value of the drive current of the motor 4 increased from the predetermined 1 st rotation speed to the predetermined 2 nd rotation speed. Then, an appropriate amount of detergent (detergent amount) to be used is calculated based on the detected mass of the laundry 36, and the detergent amount detection step is performed (step S104). The calculation of the amount of detergent is performed by the control device 38 by referring to a look-up table defining the relationship between the mass of the laundry 36 and the amount of detergent used.

The controller 38 displays the calculated amount of detergent on the display 14 of the operation panel 6 (step S105). When the user puts the displayed amount of detergent into the detergent tray 7 and a predetermined time (for example, 1 minute) elapses, the controller 38 opens a water supply solenoid valve (not shown) to spray water onto the detergent tray 7. Thereby supplying the detergent into the outer tub 2. Simultaneously with the water spray from the detergent tray 7, the washing water 54 is sprayed from the washing nozzle 53 to the dry filter 8, thereby washing off soft fibers such as lint attached to the lower surface of the dry filter 8 and the wall surface of the dry duct 29. In addition, the soft fibers were generated in the last drying operation. The washing water 54a containing the soft fibers flows from the lower portion of the drying duct 29 through the outer tub 2, the water receiving portion 2f, and the drain hose 26 via the bellows hose 29a, and the soft fibers are collected in the lint filter 27 (step S106).

Subsequently, when the water level in the outer tub 2 reaches the detergent dissolution water level set in advance, the controller 38 closes a water supply solenoid valve (not shown) to stop the water supply and the washing water 54 (step S107).

Then, the controller 38 circulates the water in the outer tub 2 from the drain hose 26 through the circulation hose 24a and the circulation hose 24c by rotating the circulation pump 24 in the reverse direction. Thereby, the detergent accumulated in the bottom of the outer tub 2 and the recess 2f is dissolved (step S108).

In step S109, a pre-wash is performed. In the pre-washing, the washing and dehydrating tub 3 is alternately rotated in the forward and reverse directions (35 to 45 revolutions per minute in total) and the circulation pump 24 is rotated in the forward direction, whereby the washing water in the outer tub 2 is scattered from the drain hose 26 to the laundry 36 in the washing and dehydrating tub 3 through the circulation hose 24a and the circulation hose 24 b.

At this time, the laundry 36 is repeatedly lifted and dropped by the lifting part 3b provided on the inner peripheral wall surface of the washing and dehydrating tub 3. Then, the controller 38 intermittently rotates the washing and dehydrating tub 3 and operates the circulation pump 24, and supplies the washing water in the tub 2 with the supply water and the washing water 54 so that the water level does not exceed the set water level by turning on a water supply solenoid valve (not shown) while referring to a detection signal of a water level sensor (not shown) during the stop of the washing and dehydrating tub 3 and the circulation pump 24. This operation is repeated a plurality of times.

Subsequently, the control device 38 executes the main washing process (step S110). Specifically, the controller 38 rotates the washing and dehydrating tub 3 alternately in the forward and reverse directions (35 to 45 revolutions per minute in total) and rotates the circulation pump 24 in the forward direction, thereby scattering the washing water in the outer tub 2 to the laundry 36 as described above. Finally, the controller 38 stops the operation of the circulation pump 24 to terminate the circulation of the washing water, alternately rotates the washing and dehydrating tub 3 in the forward and reverse directions at short cycles, and finishes the main washing process by performing the operation of dispersing the laundry 36 for a predetermined time (step S110).

As shown in fig. 5, control device 38 executes the 1 st rinsing in step S111 executed next to step S110 (see fig. 4).

In the rinsing, the controller 38 first opens the drain valve 25 to drain the water in the tub 2. After the completion of the drainage is detected by a water level sensor (not shown), the controller 38 rotates the washing and dewatering tub 3 in one direction (in the present embodiment, counterclockwise as viewed from the front (front) of the drum-type washing and drying machine S) to spin the washing water contained in the laundry 36.

Thereafter, the controller 38 opens a water supply solenoid valve (not shown) to supply tap water into the outer tub 2 and also supply the washing water 54 into the outer tub 2. Next, as in the main washing step (step S110), the washing and dehydrating tub 3 is rotated in the reverse direction (35 to 45 revolutions per minute), and the circulation pump 24 is rotated in the forward direction, so that the rinse water accumulated in the bottom of the outer tub 2 is circulated to be scattered over the laundry 36, thereby performing rinsing.

Next, the controller 38 detects the level of the rinse water accumulated in the bottom of the outer tub 2 by a water level sensor (not shown) in a state where the rotation of the washing and dehydrating tub 3 and the operation of the circulation pump 24 are stopped, and supplies the rinse water in the outer tub 2 by the supply water and the washing water 54 so that the level does not exceed a set level.

Then, the washing and dehydrating tub 3 is rotated in the reverse direction (35 to 45 revolutions per minute), and the circulation pump 24 is rotated in the forward direction, so that the rinsing water accumulated in the bottom (the recess 2f) of the outer tub 2 is circulated so as to be scattered over the laundry 36, thereby performing rinsing.

After that, in a state where circulation pump 24 is stopped and the circulation of the rinse water is terminated, controller 38 rotates washing and dehydrating tub 3 forward and backward in a short cycle to perform a dispersing operation.

In step S112, a rinsing step (2 nd rinsing step) similar to the 1 st rinsing step (step S111) is performed except that the soft finishing agent is put into the tub 2.

In step S113, a dehydration process is performed. The controller 38 rotates the washing and dehydrating tub 3 in one direction (counterclockwise in the present embodiment as viewed from the front (front) of the drum-type washing and drying machine S) as it is with the drain valve 25 opened, thereby centrifugally dehydrating the washing water contained in the laundry 36.

Subsequently, the process proceeds to the drying process by the selection of the user (step S114). Fig. 3 shows the air flow of the air during the circulation blowing by the fan 28 in the drying process. In the drying process, the washing and dehydrating tub 3 is rotated in the forward and reverse directions with the drain valve 25 opened. Then, the controller 38 drives the fan 28 to blow the warm air 43 heated by the heater 31 to the laundry 36 in the washing and dehydrating tub 3. By blowing the warm air 43, moisture is evaporated from the laundry 36. The air, which is moist by extracting moisture from the laundry 36, flows through the drying duct 29, and then is dehumidified by contacting the cooling water 52 flowing down from the cooling water supply pipe 51 toward the wall surface in the drying duct 29 by opening a cooling water valve (not shown). The air dehumidified to have a low humidity and a low temperature is sucked into the fan 28, reheated by the heater 31, and blown again to the laundry 36 in the washing and dehydrating tub 3. The laundry 36 is dried by repeating evaporation of moisture from the laundry 36 and dehumidification of air. The cooling water 52 flowing out to the wall surface in the drying duct 29 passes through the drain port 21 and is discharged by the drain hose 26. The soft fibers such as lint generated during drying enter the drying duct 29 by the air flow, and a part of the soft fibers is washed by the cooling water 52 flowing along the wall surface of the drying duct 29 and collected in the lint filter 27, and the rest is collected in the drying filter 8. The soft fibers collected in the dry filter 8 are washed by the water supply process at the time of the next washing.

By performing the above-described series of steps, the washing-drying operation step of the drum-type washing/drying machine S by the controller 38 is completed.

In the washing and drying machine configured as above, the drying filter 8 is provided in the outer tub 2, and the drying filter 8 is located at a position higher than the water level supplied to the outer tub 2. Therefore, the water seal structure for attaching and detaching the filter-drier case 8a having the filter-drier 8 built therein can be eliminated, and the cost can be reduced. Further, since the drying filter 8 is washed with the washing water 54 at the time of supplying the water for washing, and the washing water 54 is used as the washing water, the drying filter can be automatically washed without increasing the amount of water used for washing and drying. This can prevent an increase in the cost of the water used.

Next, a drum-type washing and drying machine according to embodiment 2 of the present invention will be described with reference to fig. 6. Fig. 6 is a schematic sectional view of the washing and drying machine showing the flow of the washing water during the washing water supply. The same structure as that of embodiment 1 will not be described repeatedly.

A difference from fig. 2 of embodiment 1 is that the drying filter 8 is provided obliquely with respect to the flow path of the drying duct 2 so that the washing water 54 falls substantially vertically on the plane of the drying filter 8 provided between the fan unit 40 and the drying duct 29. Since the filter area can be increased by providing the drying filter 8 in an inclined manner, a decrease in air volume due to clogging during drying can be suppressed, and an increase in drying time can be suppressed. Further, by allowing the washing water 54 to fall substantially perpendicularly to the plane of the dry filter 8, the soft fibers are easily stripped from the filter. This improves the cleanability of the filter dryer 8.

Next, a drum-type washing and drying machine according to embodiment 3 of the present invention will be described with reference to fig. 7 and 8. Fig. 7 is a schematic sectional view of the washing and drying machine showing the flow of the washing water during the washing water supply. Fig. 8 is a schematic cross-sectional view of the washing and drying machine showing the flow of air in the drying process. The same structure as that of embodiment 1 will not be described repeatedly.

The difference from fig. 2 of embodiment 1 is that an intake valve 44 and an intake duct 44a for guiding air in the casing 1 to the fan unit 40 are provided between the drying filter 8 and the drying duct 29. As in embodiment 1, the washing water 54 is sprayed from the washing nozzle 53 to the dry filter 8 simultaneously with the supply of the washing water and the supply of the washing water, thereby washing the soft fibers such as lint attached to the lower surface of the dry filter 8 and the wall surface of the drying duct 29. In addition, the soft fibers were generated in the last drying operation. The suction valve 44 is opened and closed in the latter half of the drying process, but a suction duct 44a is attached, and a suction port is provided in the suction duct 44a at a position above the suction valve 44 so that the cleaning water 54 attached to the suction valve 44 due to the opening and closing does not leak into the casing 1.

In the first half of the drying process, the washing and dehydrating tub 3 is rotated in the forward and reverse directions with the drain valve 25 opened. Then, the controller 38 drives the fan 28 to blow the warm air 43 heated by the heater 31 to the laundry 36 in the washing and dehydrating tub 3. By blowing the warm air 43, moisture is evaporated from the laundry 36. The air, which is moist by extracting moisture from the laundry 36, flows through the drying duct 29, and then is dehumidified by contacting the cooling water 52 flowing down from the cooling water supply pipe 51 toward the wall surface in the drying duct 29 by opening a cooling water valve (not shown). The air dehumidified to have a low humidity and a low temperature is sucked into the fan 28, reheated by the heater 31, and blown again to the laundry 36 in the washing and dehydrating tub 3. The laundry 36 is dried by repeating evaporation of moisture from the laundry 36 and dehumidification of air.

In the latter half of the drying process, the heater 31 is turned OFF (OFF) and the cooling water 52 is stopped as shown in fig. 8. Then, by opening the suction valve 44, the outside air 46 sucked from the gap at the lower part of the base 1h flows from the side of the tub 2 and is heated by the waste heat of the tub 2, the motor 4, and the fan 28, and is sucked into the fan 28 together with the high-temperature cabinet inside air 47 accumulated in the space between the upper surface of the tub 2 and the cabinet 1 before the first half of drying. By blowing the sucked air 48 inside the cabinet toward the laundry 36, moisture is evaporated from the laundry 36. By opening the suction valve 44, the air passage from the drying duct 29 to the drying filter 8 is closed, and the air moistened by moisture taken up from the laundry 36 passes through the drain hose 26 from the drain port 21, breaks through the water seal of the drain trap 23, and is discharged to the drain port 22. The laundry 36 is further dried by repeating evaporation of moisture from the laundry 36 and discharge of air humidified by the evaporation to the drain port 22.

As described above, according to the operation process of the drum-type washing and drying machine in embodiment 3, by performing drying using the heat accumulated in the cabinet internal air 47 or the like accumulated in the space between the upper surfaces of the laundry 36, the washing and dehydrating tub 3, the tub 2, and the tub 2 and the cabinet 1 and the residual heat of the dried external air 46 before the first half of the drying operation, the power consumption of the heater 31 in the second half of the drying process can be reduced, and the amount of water used can be reduced because cooling water is not used in the second half of the drying process. Further, water leakage due to opening and closing of the intake valve 44 can be prevented by the intake duct 44a having an intake port at a position higher than the intake valve 44.

Claims

1. A washer-dryer, characterized by comprising:

an outer barrel which becomes a drying chamber when drying;

a drum or inner tub rotatably disposed in the outer tub and capable of accommodating laundry;

a motor for driving the drum or the inner tub;

a case supporting the outer tub; and

a drying device provided in the cabinet and having a fan and a heating unit for blowing warm air from an air outlet to the laundry in the drum or the inner tub and circulating the warm air to the fan through a ventilation opening for allowing air in the outer tub to flow and a dehumidifying mechanism, wherein the drying device includes a fan and a heating unit

A filter is disposed between the drying duct having the dehumidifying mechanism built therein and the fan, and is cleaned to wash away soft fibers adhering to the filter and a wall surface of the drying duct, which are generated in the previous drying operation, when the washing water is supplied into the outer tub.

2. The washer-dryer as recited in claim 1, wherein:

the filter is disposed above a water level at which water can be supplied into the outer tub.

3. The washer-dryer as recited in claim 1, wherein:

supplying water for washing the filter to the outer tub.

4. The washer-dryer as recited in claim 1, wherein:

the filter is detachable from the case.

5. A washer-dryer, characterized by comprising:

an outer barrel which becomes a drying chamber when drying;

a motor for driving the drum or the inner tub;

a case supporting the outer tub;

a drying device provided in the cabinet, having a fan and a heating unit, blowing warm air from a blow-out nozzle to the laundry in the drum or the inner tub, and circulating the warm air to the fan through a vent through which air in the outer tub flows, a dehumidifying mechanism, and an air blowing path; and

a drain hose for draining water from the laundry,

the washing and drying machine is provided with a unit for sucking air in the space between the outer tub upper surface and the cabinet to the air supply path and discharging all or part of the air from the drum or the inner tub from the water discharge hose to the water discharge port in the drying operation, wherein the unit comprises a water discharge hose, a water discharge pipe, and a water discharge pipe

A dry filter is disposed between the dehumidifying mechanism and the fan, and is cleaned when water is supplied into the tub,

an intake duct having an intake valve for sucking air in a space between an upper surface of the outer tub and the casing and an intake port above the intake valve is provided in the air blowing path, so that wash water adhering to the intake valve due to opening and closing of the intake valve does not leak into the casing.