JP2001029687A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to carry out water feeding while effectively preventing hot air leakage by providing a washing and drying machine with a circulating path for circulating hot air heated by a heating means to an inner tub and a middle partition plate covering the upper part of an outer tub and providing a water feed hole bored at the middle partition plate with a stop valve which opens at the time of a washing stage and closes at the time of a drying stage. SOLUTION: Washing and rinsing of wash 41 are carried out by rotating a pulsator 24 with the driving power of a motor 29 via a washing shaft. A drain cock 31 is then opened to drain the washing water in the inner tub 21 and thereafter, the inner tube 21 is rotated at a high speed and the wash 41 is dehydrated by centrifugal force, following that the washing stage is shifted to the drying stage. In the drying stage, the drain cock 31 is closed and a changeover drain cock 38 is opened and the stop valve 45 disposed in the water feed hole 44 bored at the middle partition plate 36 is closed. The hot air is sent into the inner tub 21 by the heat generation of a heater 33 and the blowing action of a fan 34 for drying. The drying is progressed by circulating the hot air raised to the high humidity in the inner tube 21 to the suction side of the fan 34 inclusive of a heat exchanger 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed and dehumidifying / drying type washing / drying machine which is used in ordinary households and can perform washing and drying of laundry consistently.

[0002]

2. Description of the Related Art Conventionally, this type of washer / dryer has been configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in FIG. 11, an inner tub 1 constitutes a washing and dewatering tub, has a substantially cylindrical shape, and is rotatably contained in an outer tub 2. A fluid balancer 3 is provided above the inner tank 1, and a pulsator 4 is rotatably provided at the inner bottom. The outer tub 2 is suspended from a housing 6 by a suspension mechanism 5, and is supported by vibration isolation. A motor 7 is provided at the bottom of the outer tub 2. The motor 7 has a hollow, biaxial structure for transmitting the rotational force depending on the time of washing or dehydration.
The pulsator 4 or the inner tank 1 is rotated by incorporating a clutch for switching to the dehydrating shaft 8 and a mechanism for giving rotation.

The drainage channel 9 is connected to the lower part of the side of the outer tub 2 via a drainage cock 10. The hot air blowing means 11 has a built-in air blower for drying and a heating means (neither is shown) and blows hot air for drying. The hot air blowing means 11 is attached to the outer tank 2 and the hot air is supplied to the inner tank 1. It is configured to be sent inside. 1
Reference numeral 2 denotes laundry put into the inner tub 1. Reference numeral 13 denotes a partition plate provided above the outer tub 2 and having a slot for the laundry 12 to prevent hot air from leaking.

The operation of the above configuration will be described.
In the washing process, when the laundry 12 and the detergent are put into the inner tub 1 and water or hot water is supplied to start the operation, the pulsator 4
The clutch incorporated in the motor 7 is switched to rotate the pulsator 4, and the power of the motor 7 is transmitted to the pulsator 4 via the washing shaft, and the pulsator 4 is rotated, whereby the laundry 12 is rotated.
Is stirred by the pulsator 4 and washed.

In the dewatering process, after the washing is completed, the water in the inner tub 1 is drained by opening the drain cock 10, and the transmission of the power of the motor 7 is switched to the dehydrating shaft by a clutch built in the motor 7. Is transmitted to the inner tub 1 via the dehydrating shaft and rotated, and the laundry 12 is dehydrated by applying a centrifugal force.

In the drying process, hot air is blown into the inner tank 1 from the hot air blowing means 11 while rotating the pulsator 4.
The laundry 12 is dried by warm air.

[0008]

However, in the above-mentioned conventional configuration, the water supply path into the inner tank 1 is not particularly taken into consideration, and the hot-air blowing means 11 is removed to connect a water supply hose or the like to the inner tank 1.
Do the troublesome work of inserting into the inside and injecting water, or, like a general washing machine, make a hole in the middle partition plate to prevent hot air leakage during the drying process according to water injection from above I had to.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a washing / drying machine which secures a water supply path at the time of water supply while adopting a configuration for preventing hot air leakage during a drying process. It is an object.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a circulation path for circulating hot air heated by a heating means in an inner tank, a top part of an outer tank, and water in the inner tank. And a switching plate provided in the water supply hole, the opening and closing valve being opened during the washing process and closed during the drying process. Thus, it is possible to secure a water supply path at the time of water supply while adopting a configuration for preventing leakage of hot air during the drying process.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 includes an inner tub that is loaded with laundry and rotates about a substantially vertical axis, an outer tub that includes the inner tub, and the inner tub and the outer tub. Housing, a motor that generates the rotational force of the inner tub, a control circuit that controls each step of washing, dehydration, and drying, a heating unit, a blower for drying, and the temperature of the inner tub heated by the heating unit. A circulation path for circulating wind, a partition plate covering the upper portion of the outer tub and having a water supply hole for supplying water into the inner tub, and an on-off valve provided in the water supply hole and opened during washing and closed during drying. It is provided.

[0012] This makes it possible to secure a water supply path during the washing process and prevent leakage of hot air from the water supply hole during the drying process.

According to a second aspect of the present invention, there is provided an inner tub that is loaded with laundry and rotates about a substantially vertical axis, an outer tub that includes the inner tub, a housing that includes the inner tub and the outer tub, A motor for generating the rotation force of the inner tub, a control circuit for controlling each step of washing, dehydration, and drying, a heating unit, a blower for drying, and circulating warm air heated by the heating unit in the inner tub. Circuit,
A partition plate that covers the upper part of the outer tub and has a water supply hole for supplying water into the inner tub, and is usually provided so as to close the water supply hole, and opens with the weight of water supplied at the time of washing, elasticity. And a check valve having a check valve.

This eliminates the need for a complicated on-off valve.
A simple check valve does not require a control circuit to control the check valve, in particular, improving safety, ensuring a water supply path during the washing process, and leaking warm air from the water supply hole during the drying process. Can be prevented.

According to a third aspect of the present invention, in addition to the second aspect, a water supply valve for supplying water to the inner tank, and a water supply valve provided between the water supply valve and the partition plate and supplied from the water supply valve. A check box that normally closes the water supply hole, and at the time of washing, the weight of water supplied from the water supply valve via the detergent charge box. It is made to open with.

Thus, the washing water in which the detergent is dissolved passes through the check valve during the washing process, and the check valve can be cleaned.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, the inner tub is rotated at the time of drying, and hot air is circulated in a direction opposite to the direction of water supply to the inner tub. It is.

With this arrangement, the check valve closes the water supply hole irrespective of the elasticity of the check valve due to the wind pressure of the warm air circulating during drying, and the selection range of the check valve material is expanded, Material costs can also be reduced.

According to a fifth aspect of the present invention, in addition to any one of the first to fourth aspects, the water supply hole has a substantially inverted conical cross section.

Thus, the washing water that has fallen in the vicinity of the water supply hole is supplied to the inner tub without remaining in the vicinity of the water supply hole, and the dried laundry has water droplets remaining in the vicinity of the water supply hole attached to the dry laundry. The water droplets containing the detergent remaining in the vicinity of the water supply hole are not dried or become dirty as they are.

[0021]

(Embodiment 1) The invention of Embodiment 1 will be described with reference to FIGS.

As shown in FIGS. 1 to 4, the inner tub 21 constitutes a washing and dewatering tub, and is formed in a substantially cylindrical shape having a number of small holes (not shown) on a side surface. It is included in the tank 22 and is configured to rotate about a substantially vertical axis.
A fluid balancer 23 is provided on the upper portion of the inner tank 21, and a pot-shaped pulsator 24 serving as a stirring means is provided on the inner bottom.
Is rotatably provided. The pulsator 24 has an inclined surface 25 on the outer peripheral portion, and a plurality of radial ribs 26 passing through the inclined surface 25 and reaching almost the outer edge are provided.

The outer tub 22 is suspended from a housing 28 by a suspension mechanism 27 and is supported by vibration isolation. A motor 29 is provided at the bottom of the outer tub 22. The motor 29 has a built-in washing / dehydrating shaft, a clutch for switching the transmission of rotational force between the washing shaft and the dehydrating shaft according to the time of washing or dehydrating, and a mechanism for transmitting rotation. The tank 21 is rotated. The drainage channel 30 is connected to the bottom of the outer tub 22 via a drainage cock 31.

The hot air supply path 32 supplies hot air into the inner tank 21 during the drying process. The heater 33 is a heating means for heating the hot air, and the drying means supplies hot air into the inner tank 21. It has a blower 34 and is fixed to the housing 28. As the heater 33, a PTC heater, a sheath heater, a nichrome heater, or the like is usually used, but a PTC heater or a sheath heater is preferable from the viewpoint of safety. The hot air supply path 32
Is connected to a warm air opening 47 of a partition plate 36 provided above the outer tank 22 via a bellows-shaped telescopic tube (hereinafter referred to as a tube) 35. In addition, outer tank 22
The connection duct 37 which circulates warm air is provided in the bottom surface of. This connection duct 37 has one end connected to the bottom surface of the outer tub 22 via a drain cock 38 and the other end connected to a heat exchange unit 39. The connection duct 37, the heat exchange section 39, the heater 33, the hot air supply path 32 having the drying blower 34, and the tube 35 and the outer tub 22 form a circulation path for circulating hot air.

The middle partition plate 36 is provided with a lid 40 which can be freely opened and closed. The partition plate 36 is fixed so as to cover the upper surface of the outer tub 22 to prevent the hot air from leaking upward, and the lid 40 that can be opened and closed is opened to put the laundry 41 in and out. The tube 35 and the connection duct 37 flexibly connect the housing (fixed side) 28 and the outer tub (vibration side) 22. The heat exchange section 39 is provided outside the housing 28 and configured to exchange heat by air cooling, and a drain hole 42 is provided in a part of the connection duct 37.

The water supply valve 43 is fixed to the housing 28, and supplies tap water supplied from a water tap into the inner tank 21. The water supply valve 43 is provided through a water supply hole 44 provided in the partition plate 36.
Water is supplied within 1. Further, an opening / closing valve 45 is provided in the water supply hole 44, and the opening / closing valve 45 is used for the water supply hole 44 during washing.
Is provided so that the water supply hole 44 is closed during drying.

The control means 46 includes the motor 29, the drain cock 3
1. The operations of the water supply valve 43 and the on-off valve 45 are controlled to control each step of washing and dehydration, and the operations of the motor 29, the heater 33, the drying blower 34, the on-off valve 45, and the like are controlled. Is configured to be controlled.

In the drying process, the warm air heated by the heater 33 is blown by the drying blower 34 onto the laundry 41 stirred and blown up by the pulsator 24 in the inner tub 21. The hot air that has absorbed the moisture of the laundry 41 and became humid is cooled and exchanged heat in the heat exchange unit 39, and the circulation of sending the dehumidified hot air to the hot air supply path 32 is repeated, thereby washing the hot air. The object 41 is configured to be dried.

Next, the operation of this embodiment will be described.

First, the steps from the washing to the dehydration process will be described. Open the lid 40 that can be opened and closed, and put the laundry 4 in the inner tub 21.
1 and detergent, and start operation, the drain cock 31
With the drain cock 38 closed, the on-off valve 45
Is operated to open the water supply hole 44, and water is supplied into the inner tank 21 from the water supply valve 43 to a predetermined water level. Next, the power of the motor 29 is transmitted to the pulsator 24 via a washing shaft by a clutch built in the motor 29, and the pulsator 24 is rotated, whereby the laundry 41 is stirred and washed in the washing water. After the washing process, a rinsing process similar to the washing process is performed.

Next, the process proceeds to the dewatering process, the drain cock 31 is opened, the washing water in the inner tub 21 is drained, and the power of the motor 29 is also transmitted to the inner tub 21 via the dehydrating shaft by a clutch built in the motor 29. Then, the inner tub 21 is rotated at high speed together with the pulsator 24, and the laundry 41 is dewatered by centrifugal force.

Next, the drying process will be described. First, the drain cock 31 is closed, the switching drain cock 38 is opened, and the on-off valve 45 is operated to close the water supply hole 44. Then, by the heat generated by the heater 33 and the blowing operation of the drying blower 34, the warm air is sent into the inner tank 21 through the tube 35 and the warm air opening 47. At this time, since the middle partition plate 36 is provided, the warm air does not escape above the inner tank 21.

In the inner tub 21, the laundry 41 is rotated along the inclined portion 25 of the pulsator 24 by the rotation of the pulsator 24, and is sowed upward by the radial ribs 26 to be stirred. The warm air hits the laundry 41 soared upward to evaporate the moisture of the laundry 41, and the inner tub 2
The warm air sent into 1 becomes high humidity.

Thereafter, the high-humidity hot air flows into the connection duct 37 communicating with the lower portion of the outer tank 22 through a hole in the side surface of the inner tank 21 and a gap between the fluid balancer 23 and the partition plate 36. Then, when passing through the heat exchange unit 39, the high-humidity hot air is cooled, condensed and dehumidified in the heat exchange unit 39, and returns to the drying blower 34 again. In this way, the laundry 41 is dried while circulating and dehumidifying the warm air.

During the drying process, the dehumidified water recovered in the heat exchange section 39 is discharged outside through the drain hole 42,
In addition, the pulsator 24 continuously or intermittently rotates forward and backward, and repeats stirring and sowing of the laundry 41.

In the washing process, a water supply hole 44 is provided in the middle partition plate 36, and water can be supplied from the water supply valve 43 into the inner tub 21 through the water supply hole 44, and a water supply path during the washing process is provided. It can be secured.

In the drying step, the water supply hole 44 for water supply provided in the partition plate 36 is closed by the on-off valve 45, so that circulating warm air does not leak from the water supply hole 44, and It can be prevented that the hot air leaks into the room and the room becomes humid, or the hot air leaks and the temperature of the circulating hot air drops to cause a heat loss.

Although the heat exchanging portion 39 protrudes from the housing 28 in FIG. 1 of the present embodiment, it may be inside the housing 28. FIG. 5 shows a configuration in which the heat exchange unit 39 is provided inside the housing 28. In FIG. 5, 48 is
The cooling fan attached to the housing 28,
A configuration is adopted in which air is blown to 9 to cool it. Other configurations are the same as those in FIG. 1, and the same portions are denoted by the same reference numerals and description thereof will be omitted.

(Embodiment 2) FIGS. 6 and 7 show the second embodiment of the present invention.
It will be described based on.

This embodiment is different from the first embodiment in that
Normally, a check valve 49 is provided so as to close a water supply hole 44 provided in the partition plate 36, and is opened by the weight of water supplied from the water supply valve 43 during washing. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

That is, in FIGS. 6 and 7, 49 is provided so as to close the water supply hole 44 normally provided in the partition plate 36, and is opened by the weight of water supplied from the water supply valve 43 during washing. This is a check valve having elasticity.

Next, the operation of the present invention will be described.

Regarding the operation, the description of the parts common to the first embodiment is omitted, and only the characteristic features of the present embodiment will be described. The check valve 49 opens with the weight of the water supplied from the water supply valve 43 at the time of washing, so that a control circuit for operating the check valve 49 to open the water supply hole 44 becomes unnecessary. In the drying process, since there is no water supply from the water supply valve 43, the check valve 49, which is elastic and is normally provided so as to close the water supply hole 44, makes the water supply hole 44 available during the washing process. Even if it is open, the water supply hole 44 is elastic due to the elasticity during drying.
And a control circuit for operating the check valve 49 so as to close the water supply hole 44 becomes unnecessary.

As described above, since a control circuit for controlling the check valve 49 is not required, the check valve 49 does not require wiring for control. When the check valve 49 needs to be controlled, the flowing current is very small, but since the place where the check valve 49 is attached is around water, it cannot be said that there is no failure due to an electric short circuit or the like. For example, the water supply hole 44 is closed at the time of water supply due to a failure, and the water supplied from the water supply valve 43 is
It is easy to imagine flooding and flooding the room. However, according to the present embodiment, there is no need to worry about a failure around the electricity related to such a check valve, and safety is improved.

As described above, according to the present embodiment, the use of the simple check valve 49 eliminates the need for a complicated on-off valve requiring control, thereby improving safety. And the leakage of warm air from the water supply hole 44 during the drying process can be prevented.

(Embodiment 3) FIGS. 8 and 9 show the third embodiment of the present invention.
It will be described based on.

The present embodiment is different from the first and second embodiments in that a water supply hole 50 having a substantially inverted conical cross section is provided in the partition plate 36, and the water supply valve 43 is provided between the water supply valve 43 and the water supply hole 50. And a detergent input box 51 for inputting a detergent. In the present embodiment, the same components as those in the first and second embodiments are assigned the same reference numerals and the detailed description is omitted.

That is, in FIGS. 8 and 9, reference numeral 50 denotes a water supply hole provided on the partition plate 36 and having a substantially inverted conical cross section. Reference numeral 51 denotes a detergent supply box provided between the water supply valve 43 and the water supply hole 50 for supplying a detergent.
And a drain hole 53 for draining the washing water in which the detergent is dissolved in the water supplied from the water supply port toward the lower water supply hole 50.

Next, the operation of the present invention will be described.

Regarding the operation, the description of the parts common to the first and second embodiments is omitted, and only the characteristic features of the present embodiment will be described. In the present embodiment, at the time of the washing process, first, the drawer 52 of the detergent input box 51 is pulled out, the detergent is input, and the drawer 52 is set in the detergent input box 51 again. Next, when the operation is started, the water supply valve 43 is opened, and the water from the tap water is supplied to the detergent charging box 51, mixed with the detergent, and the washing water in which the detergent is dissolved is discharged from the drain hole 53 to the lower partition plate 36 below. The water is drained toward the water supply hole 50 provided.

A check valve 49 provided in the water supply hole 50 and having elasticity opens the water supply hole 50 by the weight of the washing water falling from above, and the washing water is supplied into the inner tub 21. At this time, the washing water in which the detergent is dissolved passes through the check valve 49, and the check valve 49 can be washed.

Since the water supply hole 50 has a substantially inverted conical cross section, the washing water that has fallen from the drain hole 53 of the detergent supply box 51 to the vicinity of the water supply hole 50 does not remain near the water supply hole 50, and the washing water flows out of the water supply hole 50. It is supplied into the inner tank 21. For this reason, the dried laundry does not get wet due to the water droplets remaining in the vicinity of the water supply hole 50 or the water droplets containing the detergent remaining in the vicinity of the water supply hole 50 do not dry and become stains in the vicinity of the water supply hole 50. .

Although the water supply hole 50 and the check valve 49 are provided one by one in the drawing of this embodiment, there is no problem even if a plurality of small ones are provided.

(Embodiment 4) The invention of Embodiment 4 will be described with reference to FIG.

This embodiment is different from the first, second or third embodiment in that a drying blower 54 for circulating warm air in a direction opposite to the direction of water supply to the inner tank 21 is provided. Vessel 21
Is configured to rotate during drying. In this embodiment, the same components as those of the first, second, or third embodiment are denoted by the same reference numerals, and the detailed description is omitted.

That is, in FIG.
This is a drying blower that supplies warm air into the inside, and is provided so as to circulate warm air in a direction opposite to the direction of water supply to the inner tank 21. Also, the inner tub 21 is provided so as to rotate during drying so that the laundry sticks to the side wall of the inner tub 21 during drying.

Next, the operation of the present invention will be described.

Regarding the operation, the description of the parts common to the first, second or third embodiment is omitted, and only the characteristic features of the present embodiment will be described. In the drying process, the power of the motor 29 is also transmitted to the inner tub 21 via a dehydrating shaft by a clutch built in the motor 29, the inner tub 21 is rotated together with the pulsator 24, and the laundry 41 is transferred to the inner tub 21 by centrifugal force. Attach to the inner side wall. In this state, due to the heat generated by the heater 33 and the blowing operation of the drying blower 54, warm air is sent from the heat exchange unit 39 into the outer tub 22 through the connection duct 37 communicating with the lower part of the outer tub 22. Then, from the outside of the hole provided in the side wall of the inner tank 21 to the inner direction, the inner tank 2
The laundry passes through the laundry stuck to the inner side wall of the inner tub 21 and is then sent to the tube 35 from above the inner tub 21.

When the warm air passes through the laundry 41 stuck to the inner side wall of the inner tub 21, the moisture of the laundry 41 evaporates and becomes hot air of high humidity. The high-humidity hot air returns from the tube 35 to the drying blower 54 again, and is sent to the rear heat exchange unit 39. The high-humidity hot air is cooled in the heat exchange unit 39, condensed and dehumidified, and returns to the inner tank 21 through the connection duct 37 again. In this manner, the laundry 41 is dried while circulating and dehumidifying the warm air.

In the drying process, since the warm air flows upward in the inner tank 21 against the gravity, the upward force is also exerted on the check valve 49 provided in the water supply hole 50. work. The air pressure of the warm air allows the check valve 49 to firmly press the water supply hole 50 from below, regardless of whether the check valve 49 has elasticity. It is closed by the valve 49, and the leakage of the warm air from the water supply hole 50 is eliminated. Therefore, the selection range of the material used for the check valve 49 is expanded, and the material cost can be reduced.

[0061]

As is apparent from the above embodiment, according to the first aspect of the present invention, it is possible to secure a water supply path during the washing process and prevent leakage of hot air from the water supply hole during the drying process. .

According to the second aspect of the present invention, a complicated on-off valve is not required, and a simple check valve does not require a control circuit for controlling the check valve, thereby improving safety. A water supply path during the washing process can be secured, and leakage of warm air from the water supply hole during the drying process can be prevented.

According to the third aspect of the invention, the washing water in which the detergent is dissolved passes through the check valve during the washing process, and the check valve can be cleaned.

According to the fourth aspect of the present invention, the water supply hole can be closed by the check valve regardless of the elasticity of the check valve by the wind pressure of the warm air circulating during drying. The range of choice of materials used for the stop valve is widened, and material costs can be reduced.

According to the fifth aspect of the present invention, since the water supply hole has a substantially inverted conical cross section, the washing water that has fallen near the water supply hole is also supplied into the inner tub without remaining near the water supply hole. ,
The dried laundry may become wet due to the water droplets remaining near the water supply hole, or the water droplets containing the detergent remaining near the water supply hole may dry and become soiled near the water supply hole. Can be lost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a washing and drying machine during a drying process according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the washing and drying machine during a washing process.

FIG. 3 is a plan view of a partition plate and a lid that can be freely opened and closed in the washing and drying machine.

FIG. 4 is an external perspective view of an on-off valve of the washing and drying machine.

FIG. 5 is a sectional view showing another configuration of the washing / drying machine.

FIG. 6 is a cross-sectional view of the washing and drying machine during a washing process according to the second embodiment of the present invention.

FIG. 7 is a detailed sectional view around the check valve of the washing and drying machine.

FIG. 8 is a cross-sectional view of the washing and drying machine during a washing process according to a third embodiment of the present invention.

FIG. 9 is a detailed sectional view around a water supply hole of the washing and drying machine.

FIG. 10 is a cross-sectional view of a washing / drying machine during a drying process in Embodiment 4 of the present invention.

FIG. 11 is a configuration diagram of a conventional washing / drying machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Inner tank 22 Outer tank 28 Housing 29 Motor 33 Heater (heating means) 34 Drying blower 36 Middle partition plate 43 Water supply valve 44 Water supply hole 45 Open / close valve 49 Check valve 50 Water supply hole 51 Detergent box 53 Drainage hole 54 Drying Blower

Claims (5)

[Claims] 1. An inner tub that is loaded with laundry and rotates about a substantially vertical axis, an outer tub that includes the inner tub, a housing that includes the inner tub and the outer tub, and a rotation of the inner tub. A motor that generates power, a control circuit that controls each step of washing, dehydration, and drying, a heating unit, a blower for drying, and a circulation path that circulates hot air heated by the heating unit in the inner tank, A washing / drying machine comprising: a partition plate that covers an upper portion of an outer tub and has a water supply hole for supplying water into the inner tub; and an opening / closing valve provided in the water supply hole and opened during washing and closed during drying. 2. An inner tub that is loaded with laundry and rotates about a substantially vertical axis, an outer tub that includes the inner tub, a housing that includes the inner tub and the outer tub, and rotation of the inner tub. A motor that generates power, a control circuit that controls each step of washing, dehydration, and drying, a heating unit, a blower for drying, and a circulation path that circulates hot air heated by the heating unit in the inner tank, A partition plate that covers the upper part of the outer tub and has a water supply hole for supplying water to the inner tub, and is usually provided so as to close the water supply hole, and opens with the weight of water supplied at the time of washing. Washer / dryer provided with a check valve. 3. A water supply valve for supplying water to the inner tank, and a detergent provided between the water supply valve and the partition plate for dissolving the detergent in the water supplied from the water supply valve and draining the water from a rear drain hole. 3. The washer / dryer according to claim 2, further comprising an input box, wherein the check valve normally closes a water supply hole, and is opened by the weight of water supplied from the water supply valve via the detergent input box during washing. 4. The method according to claim 3, wherein the inner tank is rotated during drying, and hot air is circulated in a direction opposite to a direction of water supply to the inner tank.
The washing and drying machine as described. 5. The washing and drying machine according to claim 1, wherein the water supply hole has a substantially inverted conical cross section.