WO2023243551A1

WO2023243551A1 - Washing machine

Info

Publication number: WO2023243551A1
Application number: PCT/JP2023/021472
Authority: WO
Inventors: 智之田口; 謙治寺井; 正訓竹川; 光徳谷口
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2022-06-17
Filing date: 2023-06-09
Publication date: 2023-12-21
Also published as: TW202403143A; JP2023184304A

Abstract

A washing machine according to the present disclosure comprises: a housing including a housing opening communicated with an inner space; a water tank provided in the inner space; and a rotary drum provided in the water tank in a rotatable manner around a rotational shaft. The washing machine further comprises: an air intake opening that is provided to be communicated with the inner space and through which drying air is taken in; an intake air channel that supplies the drying air from the air intake opening to an intake air connection opening provided on the water tank; and a heater arranged in the intake air channel. The washing machine still further comprises: an exhaust air opening that is formed on the housing and through which the drying air is discharged; and an exhaust air channel that supplies the drying air from an exhaust air connection opening provided along an outer periphery of the water tank to the exhaust air opening. An opening orientation of the housing opening and an opening orientation of the air intake opening are different.

Description

washing machine

The present disclosure relates to a washing machine.

For example, Patent Document 1 discloses a washer/dryer that includes a washing tub that stores laundry, a heat pump device, and a blower fan.

The washing machine described in Patent Document 1 achieves a drying function using a heat pump device and a blower fan. The washing tub and the heat pump device are connected by a circulation air path. The air heated by the heat pump device is circulated between the water tank and the heat pump device by a blower fan to dry the laundry.

Japanese Patent Application Publication No. 2011-136075

However, by providing a heat pump device and a blower fan to realize the drying function, the structure of the washing machine becomes complicated and the cost of the washing machine increases.

Therefore, the present disclosure provides a washing machine that can realize a drying function with a simpler structure and further reduce the cost of the washing machine.

A washing machine according to one aspect of the present disclosure includes a casing having a casing opening that communicates with an internal space, a water tank provided in the internal space, and a rotating drum provided in the water tank so as to be rotatable around a rotation axis. , is provided. The washing machine also includes an intake port that is provided in communication with the internal space and that takes in drying air, and an intake air path that supplies drying air from the intake port to an intake connection port that is provided in the water tank. A heater arranged in the intake air path. In addition, the washing machine has an exhaust port formed in the housing through which drying air is exhausted, and an exhaust air path that supplies drying air from an exhaust connection port provided along the outer periphery of the water tank to the exhaust port. and. The direction in which the housing opening opens is different from the direction in which the intake port opens.

A washing machine according to one embodiment of the present disclosure can achieve a drying function with a simpler structure and further reduce costs.

A perspective view of a washing machine according to an embodiment of the present disclosure A perspective view of a washing machine according to an embodiment Top view of a washing machine according to an embodiment Cross-sectional view of a washing machine according to an embodiment A partial perspective view of a washing machine according to an embodiment A cross-sectional view of a part of the washing machine according to the embodiment as seen from the width direction A cross-sectional view of a part of the washing machine according to the embodiment seen from the front side. A perspective view of an intake air path of a washing machine according to an embodiment. A sectional view of an intake air path of a washing machine according to an embodiment A perspective view of an exhaust air path of a washing machine according to an embodiment. A sectional view of an exhaust air passage of a washing machine according to an embodiment A diagram showing a connection between an exhaust air path and a water tank of a washing machine according to an embodiment. A diagram showing a connection between an exhaust air path and a water tank of a washing machine according to an embodiment. Exploded view of the front structure of the washing machine according to the embodiment Exploded view of the front structure of the washing machine according to the embodiment An enlarged view of the door packing member of the washing machine according to the embodiment An enlarged view of the door packing member of the washing machine according to the embodiment Enlarged view of the casing of the washing machine according to the embodiment Enlarged view of the casing of the washing machine according to the embodiment An enlarged sectional view of the door and casing of the washing machine according to the embodiment An enlarged sectional view of a ventilation path of a washing machine according to an embodiment Flowchart of the drying process of the washing machine according to the embodiment

(Embodiment)
A washing machine 1 according to an embodiment of the present disclosure will be described. Note that in the present disclosure, the direction is defined based on the installation state when the washing machine is normally used. For example, below, the vertical direction in the installed state of the washing machine 1 shown in FIG. 1A may be described as an up-down direction. Further, in the installed state, the horizontal direction when viewed from the front surface 2A side may be described as the left-right direction.

[overall structure]
1A and 1B are perspective views showing the configuration of a washing machine 1 according to an embodiment of the present disclosure. FIG. 1A is a perspective view of washing machine 1 with door 21 closed, and FIG. 1B is a perspective view of washing machine 1 with door 21 open. FIG. 1C is a top view showing the configuration of the washing machine 1. FIG. 1D is a sectional view showing the configuration of washing machine 1. FIG. FIG. 2 is a perspective view showing a partial configuration of the washing machine 1. As shown in FIG.

As shown in FIGS. 1A to 1D, the washing machine 1 includes a housing 2, a water tank 3 (FIG. 1D), a washing tub 4 (FIG. 1D), a washing agent supply unit 5, a drying air path 6, It includes a heater 11 (FIG. 1C) and a control section C.

<Housing>
As shown in FIGS. 1A and 1B, the housing 2 is a member that forms the appearance of the washing machine 1. As shown in FIGS. 1C and 1D, the housing 2 defines an interior space 26. As shown in FIGS. The internal space 26 accommodates a water tank 3, a washing tub 4, a washing agent supply unit 5, and a drying air passage 6.

As shown in FIG. 1B, the front surface 2A of the housing 2 is provided with an opening 20 that communicates with the water tank 3 and a door 21 that can be opened and closed to cover the opening 20. The opening 20 corresponds to an example of an inlet according to the present disclosure.

<Aquarium>
As shown in FIG. 1D, the water tank 3 is a generally cylindrical member that is provided inside the housing 2 and is closed at one end so as to store washing water. The water tank 3 has a cylindrical portion 34 and a bottom portion 36 that closes one end of the cylindrical portion 34 . The water tank 3 has an opening 31 facing the bottom 36 at a position facing the opening 20 . Water tank 3 may also be referred to as an outer tank.

<Washing tub>
The washing tub 4 is a generally cylindrical member that is provided inside the water tub 3 so as to be rotatable around the rotation axis V0, and accommodates laundry such as clothes. The washing tub 4 is rotationally driven by, for example, a motor. The washing tub 4 has an opening 41 at a position facing the opening 20 for loading laundry. The washing tub 4 may also be called a rotating drum or an inner tub.

Additionally, the washing tub 4 is formed with a large number of through holes (not shown) that communicate with the water tub 3. The through holes allow movement of air, water and detergent between the water tub 3 and the washing tub 4.

The rotation axis V0 extends substantially horizontally. In the present disclosure, "extending substantially horizontally" means extending in a direction having an inclination within 5 degrees from the horizontal. Further, the horizontal direction along the rotation axis V0 is defined as the front-rear direction M, and the horizontal direction perpendicular to the rotation axis V0 is defined as the width direction K. The front-rear direction M has a front side M1 facing the opening 41 and a rear side M2 facing away from the opening 41. The front side M1 can also be said to be a direction toward the front surface 2A, and the rear side M2 can be said to be a direction away from the front surface 2A.

<Washing agent supply unit>
As shown in FIGS. 1C and 1D, the laundry agent supply unit 5 is a unit that supplies laundry treatment agents such as liquid agents, powdered detergents, and solid agents to the washing tub 4. The liquid agent is a liquid agent used for washing laundry such as clothes. The liquid may include detergent, fabric softener, and neutral detergent.

<Drying air path>
As shown in FIGS. 1C and 2, the drying air passage 6 is a duct provided in the internal space 26 of the housing 2 and for flowing drying air into the water tank 3 and the washing tub 4. The drying air path 6 forms a flow path through which drying air passes. Through the drying air path 6, drying air is introduced from the internal space 26 of the housing 2 into the water tank 3 and the washing tub 4, and is discharged from the water tank 3 and the washing tub 4 to the outside of the housing 2 (as indicated by the arrow A in FIG. 2). ).

The drying air path 6 is divided into an intake air path 7 and an exhaust air path 8. The intake air passage 7 and the exhaust air passage 8 are connected to each other via the water tank 3 and the washing tub 4, and the drying air passes through the intake air passage 7, the water tank 3 and the washing tub 4, and the exhaust air passage 8 in this order. . The intake air passage 7 connects the internal space 26 of the housing 2 and the water tank 3 and supplies drying air to the water tank 3. The exhaust air path 8 communicates the water tank 3 with the outside of the housing 2 and discharges drying air from the water tank 3.

<Heater>
The heater 11 (FIG. 1C) is a heating means that is provided inside the intake air passage 7 and heats the drying air flowing into the intake air passage 7. In the embodiment, the heater 11 is a non-insulated type heater. The heater 11 does not have an insulating cover that covers the heat generating part or the connection part that electrically connects the heat generating part to the power source, and has a simpler structure. The heater 11 is, for example, a nichrome wire heater.

<Control unit>
As shown in FIGS. 1A and 1B, the control unit C is a member that controls the operation of the washing machine 1. The control unit C includes, for example, a memory (not shown) that stores a program, and a processing circuit (not shown) corresponding to a processor such as a CPU (Central Processing Unit). The above control may be implemented. Further, the control unit C may be a specially designed hardware circuit that implements the above control.

Here, the structure of the housing 2 will be explained in more detail. As shown in FIG. 1B, a housing opening 23 is formed in the front surface 2A of the housing 2 above the opening 20. As shown in FIG. 1D, the housing opening 23 allows the external space 25 and the internal space 26 of the housing 2 to communicate with each other. The housing opening 23 opens toward the front side M1.

As shown in FIGS. 1A, 1B, and 1D, the door 21 forms a ventilation passage 24 at a position facing the housing opening 23. The ventilation passage 24 penetrates the door 21 and allows air to pass through the door 21. When the door 21 is closed, the ventilation passage 24 communicates with the housing opening 23, and air from the external space 25 passes through the ventilation passage 24 and the housing opening 23 in this order and flows into the housing 2.

On the other hand, when the door 21 is open, the ventilation passage 24 and the housing opening 23 are separated.

The flow of air flowing into the housing 2 will be explained with reference to FIGS. 2 and 3. FIG. 3 is a sectional view showing the configuration of a part of the washing machine 1 as seen from the width direction K.

As shown in FIG. 2, the drying air that has flowed into the housing 2 passes through the internal space 26, the intake air passage 7, the water tank 3, the washing tub 4, and the exhaust air passage 8 in order, and then passes through the outside of the housing 2. The air is exhausted into the space 25. The drying air passes through the housing 2 in one pass, unlike when air circulates through the housing 2.

More specifically, the drying air flows from the external space 25 of the housing 2 through the housing opening 23 into the internal space 26 above the water tank 3. The air that has flowed into the internal space 26 flows toward the rear side M2, then bends back and flows into the intake air passage 7. In the present disclosure, "bent back" means that the traveling direction before turning and the traveling direction after turning intersect with each other at an angle of at least 45°. In this embodiment, the air that has flowed into the internal space 26 is bent by 180 degrees and flows into the intake air passage 7 .

As shown in FIG. 3, the drying air in the intake air passage 7 is heated by the heater 11, and the heated drying air flows from the intake air passage 7 into the water tank 3 and the washing tub 4. In the washing tub 4, the drying air comes into contact with the wet laundry and dries the laundry.

After the drying air in the washing tub 4 removes moisture from the laundry, it is discharged to the external space 25 of the housing 2 via the exhaust air path 8.

Here, the structure of the water tank 3 through which drying air passes will be explained in more detail.

As shown in FIG. 3, the cylindrical portion 34 of the water tank 3 has an accommodating portion 32 that accommodates the washing tub 4, and a narrow portion 33 located on the front side M1 of the accommodating portion 32. The narrowed portion 33 forms an opening 31 and has a shape narrowed toward the opening 31 . Therefore, the narrowed portion 33 has a smaller radius than the accommodating portion 32.

An exhaust connection port 38 is formed in the housing portion 32 along the outer periphery of the water tank 3. The exhaust connection port 38 is an opening for communicating the exhaust air passage 8 with the aquarium 3 . Drying air flows from the water tank 3 into the exhaust air path 8 via the exhaust connection port 38.

An intake connection port 37 along the outer periphery of the water tank 3 is formed in the narrowed portion 33 . The intake connection port 37 is an opening for communicating the intake air passage 7 with the water tank 3 . Drying air flows into the water tank 3 from the intake air path 7 through the intake connection port 37. The intake connection port 37 is formed on the front side M1 of the exhaust connection port 38.

With this structure, the intake connection port 37 and the exhaust connection port 38 are separated from each other in the front-rear direction M. Therefore, the path of the drying air passing through the water tank 3 (namely, the washing tub 4) can be lengthened, making it easier to apply the drying air to more laundry items.

In addition, the intake connection port 37 is formed closer to the rotation axis V0 than the exhaust connection port 38.

Here, the principle of generating air flow in the drying process will be explained with reference to FIG. 4. FIG. 4 is a cross-sectional view showing the configuration of a part of the washing machine 1 viewed from the front side M1.

As shown in FIG. 4, the washing tub 4 rotates in the first rotation direction R1 around the rotation axis V0 during the drying process.

When the rotation speed of the washing tub 4 is at least a predetermined value, for example, 550 rpm or more, a swirling flow along the first rotation direction R1 is generated in the washing tub 4. The swirling flow may be a forced vortex. The forced vortex forms an air velocity distribution within the washing tub 4. Specifically, the velocity of the air increases as the distance from the rotation axis V0 increases.

In the washing machine 1, since the exhaust connection port 38 is formed at a position farther from the rotation axis V0 than the intake connection port 37, the air near the exhaust connection port 38 has a higher velocity than the air near the intake connection port 37. Therefore, air tends to flow out through the exhaust connection port 38.

When the air flows out through the exhaust connection port 38, the inside of the washing tub 4 becomes under negative pressure. Due to the negative pressure, air is sucked into the washing tub 4 through the air intake port 37.

Based on this principle, even in the washing machine 1 without a fan, rotation of the washing tub 4 generates a forced vortex, thereby creating a pressure difference in the drying air passage 6 and generating an air flow.

When the aquarium 3 is viewed from the front (front side M1), the exhaust air passage 8 extends upward from the upper right portion of the outer periphery of the aquarium 3. The lower end of the exhaust air passage 8 is connected to an exhaust connection port 38. Therefore, the exhaust connection port 38 is also formed at the upper right portion of the outer periphery of the water tank 3. In other words, the exhaust connection port 38 is formed in the upper right fan-shaped portion upstream from the apex of the water tank 3 when viewed from the first rotation direction R1 in the drying process.

The air flow (arrow C1) near the exhaust connection port 38 has a velocity component in the same direction as the direction in which the exhaust air path 8 extends (upward). On the other hand, the air flow (arrow C2) in the upper left fan-shaped portion of the water tank 3 has a velocity component in the opposite direction to the direction in which the exhaust air path 8 extends. By forming the exhaust connection port 38 on the right side, the washing machine 1 can utilize the centrifugal force of the washing tub 4 to promote air outflow compared to the case where the exhaust connection port 38 is formed on the left side.

Next, the structure of the intake air passage 7 will be described with reference to FIGS. 3, 5, and 6. FIG. 5 is a perspective view showing the configuration of the intake air passage 7. As shown in FIG. FIG. 6 is a cross-sectional view showing the configuration of the intake air passage 7. As shown in FIG.

As shown in FIG. 3, the intake air passage 7 extends diagonally downward along the outer periphery of the water tank 3.

As shown in FIG. 5, the intake air passage 7 extends from the intake port 71 to the intake outlet 79. The intake port 71 is formed in the internal space 26 above the water tank 3 and is an opening for allowing drying air to flow into the intake air path 7. The intake outlet 79 is an opening that communicates with the intake connection port 37 .

The intake port 71 opens toward the rear side M2, and, as described above, opens in a different direction from the housing opening 23, which opens toward the front side M1. Further, the intake air passage 7 extends from the intake port 71 to the front side M1. Therefore, in the intake air path 7, the drying air flows toward the front side M1. As shown in FIG. 3, the direction in which the drying air passes through the intake port 71 (front side M1) is opposite to the direction in which the drying air passes through the housing opening 23 (rear side M2). Further, the intake port 71 and the housing opening 23 are separated from each other. Therefore, in order for the drying air to flow into the intake port 71, the drying air needs to bend approximately 180 degrees in the internal space 26 between the housing opening 23 and the intake port 71.

To summarize the arrangement of the openings related to air intake, the housing opening 23 is formed on the front side M1 of the air intake port 71, and the air intake port 71 is formed on the rear side M2 of the air intake outlet 79 and the air intake connection port 37.

As shown in FIGS. 3 and 6, a heater 11 is housed in the flow path formed by the intake air path 7. Since the intake port 71 is open toward the rear side M2, it is possible to suppress liquid such as water or foam that is injected through the door 21 from hitting the heater 11. Furthermore, lint and dust passing through the housing opening 23 also become difficult to reach the heater 11. Therefore, even when a filter is not provided between the intake port 71 and the heater 11, adhesion of lint to the heater 11 can be suppressed.

The heater 11 is housed in the intake air passage 7 facing the intake port 71. This arrangement allows the heater 11 to be separated from the intake connection port 37, making it difficult for bubbles B and water flowing back from the water tank 3 to hit the heater 11. Further, since the intake port 71 is formed above the water tank 3 and the heater 11 is also arranged above the water tank 3, water is less likely to come into contact with the heater 11 even in an abnormal state where water leaks from the water tank 3.

As shown in FIG. 6, a check valve 75 is provided downstream of the heater 11 in the flow path formed by the intake air path 7. The check valve 75 has a structure that restricts the flow of air through the intake air passage 7 in one direction. The check valve 75 is opened by the flow of air from the intake port 71 toward the intake port 79 and closed by the flow of air from the intake port 79 toward the intake port 71 . With such a structure, the check valve 75 can suppress backflow of water and bubbles B from the water tank 3 through the intake air passage 7. Note that the check valve 75 corresponds to an example of the first valve of the present disclosure.

Next, the structure of the exhaust air passage 8 will be described with reference to FIGS. 3 and 7 to 9B. FIG. 7 is a perspective view showing the configuration of the exhaust air passage 8. As shown in FIG. FIG. 8 is a cross-sectional view showing the configuration of the exhaust air passage 8. As shown in FIG. 9A and 9B are diagrams showing the connection between the exhaust air path 8 and the water tank 3. FIG.

As shown in FIG. 3, the exhaust air passage 8 extends upward from the water tank 3.

As shown in FIG. 7, the exhaust air passage 8 has a bent shape. More specifically, the exhaust air passage 8 includes a connecting portion 88, a first bent portion 82, a bellows portion 84, and a second bent portion 83 in order of distance from the water tank 3 (FIG. 3). The connecting portion 88 is a member connected to the water tank 3 and extends upward. The first bending part 82 bends the exhaust air passage 8 from above in the front-rear direction M (rear side M2), and the second bending part 83 bends the exhaust air passage 8 from the front-rear direction M upward. The bellows portion 84 is a member that connects the first bent portion 82 and the second bent portion 83 in the front-rear direction M, and has a bellows structure that reduces vibration. The first bending part 82 and the second bending part 83 allow the exhaust air passage 8 to be extended upward, and an air outlet (exhaust port 81 to be described later) to be arranged on the rear side M2. The bellows portion 84 can suppress vibrations of the water tank 3 from being transmitted to the housing 2.

The exhaust air passage 8 extends from the exhaust inlet 89 to the exhaust port 81. The exhaust inlet 89 is an opening that communicates with the exhaust connection port 38 . The exhaust port 81 is provided so as to protrude from the housing 2 toward the rear side M2 (FIG. 1C), and is an opening for exhausting drying air from the exhaust air path 8.

The exhaust port 81 opens upward. Therefore, the drying air is discharged upward from the housing 2. The discharged air is heated by the heater 11 and is humidified because it removes moisture from the clothing. By discharging such air upward, it is possible to prevent the air from hitting the walls and other equipment around the washing machine 1.

The exhaust port 81 has a long shape in the width direction K (FIG. 1C). With such a structure, the washing machine 1 can secure a larger displacement while reducing the dimension in the front-rear direction M.

As shown in FIG. 8, a valve 85 is accommodated in the flow path formed by the exhaust air path 8. The valve 85 has a structure that allows air to pass toward the exhaust port 81 while restricting the passage of bubbles B.

The valve 85 is, for example, a ball valve that is movable in the vertical direction. In this case, the exhaust air passage 8 forms a narrowed portion 85A in which the flow passage cross section becomes narrow downstream of the valve 85. The valve 85 is movable up and down between an open position away from the stenosis 85A and a closed position where it closes the stenosis 85A. Valve 85 is normally located in an open position in response to gravity. When air flows through the exhaust air passage 8, the valve 85 remains in the open position because the force of the air is less than the buoyant force required to lift the valve 85. On the other hand, when bubbles enter the exhaust air passage 8, the bubbles B lift the valve 85, and the valve 85 rises to the closed position. Therefore, bubbles B can be prevented from reaching the exhaust port 81. Note that the valve 85 corresponds to an example of the second valve of the present disclosure.

In the exhaust air path 8, the flow of fluids to be blocked, such as bubbles B and water, and the flow of drying air are in the same direction. In the intake air path 7, the flow of fluids to be prevented, such as bubbles B and water, and the flow of drying air are in opposite directions. Therefore, valve 85 is a different type of valve from check valve 75. In this embodiment, the valve 85 is a ball valve, and the check valve 75 is a swing type check valve.

As shown in FIG. 9A, the washing tub 4 rotates in the first rotation direction R1 during the drying process.

As shown in FIGS. 9A and 9B, a rib 86 is formed at the exhaust connection port 38. The rib 86 protrudes from one side 38A of the exhaust connection port 38 toward the other side 38B so as to partially block the exhaust inlet 89. The direction in which the ribs 86 protrude is a second rotation direction R2 that is opposite to the first rotation direction R1. When viewed from the second rotation direction R2, the side 38A is provided downstream of the side 38B. The end of the rib 86 is located below the center of the valve 85 . Note that the side 38A corresponds to an example of the first side of the present disclosure, and the side 38B corresponds to an example of the second side of the present disclosure.

As shown in FIG. 9A, the ribs 86 can restrict where on the valve 85 the bubbles B that have risen after passing through the exhaust inlet 89 hit.

When the washing tub 4 rotates, the bubbles B move along the first rotation direction R1. Therefore, when the rib 86 is not formed, a portion of the bubbles B moving along the first rotation direction R1 hits the side 38A and rises along the side surface of the exhaust air passage 8 extending from the side 38A. In this case, since the bubbles B hit the end of the valve 85, the bubbles B may not be able to lift the valve 85 sufficiently, and may pass through between the side surface of the exhaust air passage 8 and the valve 85 and reach the exhaust port 81.

On the other hand, when the rib 86 is formed in the exhaust connection port 38, the bubbles B hit the rib 86, rise from the lower side near the center of the valve 85, and hit the center of the valve 85. In this case, compared to the case where the bubbles B hit the vicinity of the outer periphery of the valve 85, the valve 85 is more likely to be lifted and the exhaust air passage 8 is more likely to be sealed. Therefore, bubbles B can be prevented from reaching the exhaust port 81.

By configuring the exhaust air passage 8 in this way, it is possible to adopt a structure in which air easily flows into the exhaust air passage 8 by rotation in the first rotation direction R1, while suppressing the entry of fluids other than air.

Next, the structure of the ventilation passage 24 of the door 21 and the housing opening 23 will be described with reference to FIGS. 10A to 13B. 10A and 10B are exploded views showing the front structure of the washing machine 1. FIG. 11A and 11B are enlarged views showing the structure of the door packing member 28 of the door 21. FIG. 12A and 12B are enlarged views showing the structure of the casing 2. FIG. FIG. 13A is an enlarged sectional view showing the structure of the door 21 and the housing 2. FIG. FIG. 13B is an enlarged cross-sectional view of the ventilation passage 24.

As shown in FIGS. 10A and 10B, the door 21 includes a door main body 27 and a door packing member 28. The door body 27 is a disc-shaped member that is larger than the opening 20 of the housing 2 and covers the entire surface of the opening 20. The door packing member 28 is a member that brings the door body 27 into close contact with the front surface 2A corresponding to the outer peripheral portion of the opening 20. The door packing member 28 is made of resin. Therefore, the washing machine 1 can improve the aesthetics while ensuring the sealing performance of the door 21.

An opening 27A is formed in the upper part of the door body 27, and a ventilation passage 24 is formed in the upper part of the door packing member 28. The opening 27A is an opening for the ventilation passage 24 to protrude. The ventilation path 24 penetrates the door packing member 28 and forms a flow path for introducing air from the external space 25 into the interior of the casing 2 .

As shown in FIG. 11A, an entrance 24A of the ventilation passage 24 is formed on the front M1 surface (FIG. 10A) of the door packing member 28. The inlet 24A protrudes toward the front side M1 and opens in the front-rear direction M.

As shown in FIG. 11B, an outlet 24B of the ventilation passage 24 is formed on the rear M2 surface (FIG. 10B) of the door packing member 28. The outlet 24B is open upward. Therefore, the fluid flowing into the ventilation passage 24 curves and flows out from the ventilation passage 24 .

A claw portion 24C that protrudes from the surface of the door packing member 28 toward the rear side M2 is formed around the exit 24B. The claw portion 24C is a member that engages with the housing 2.

Returning to FIGS. 10A and 10B, a housing opening 23 is formed in the front surface 2A of the housing 2 at a position facing the ventilation path 24. The housing opening 23 opens in the lateral direction (for example, in the front-rear direction M).

As shown in FIGS. 12A and 12B, a plurality of openings 24D are formed around the housing opening 23. The opening 24D, together with the housing opening 23, is an opening for engaging with the claw portion 24C. By engaging the claw portion 24C with the opening 24D and the housing opening 23, the door 21 can be positioned with respect to the housing 2 more reliably, and the housing opening 23 and the ventilation passage 24 can be communicated with each other.

As shown in FIG. 13A, when the door 21 is engaged with the housing 2, the ventilation passage 24 and the housing opening 23 communicate with each other. Air in the external space 25 of the housing 2 passes through the ventilation passage 24 and the housing opening 23 and flows into the internal space 26 due to the negative pressure in the internal space 26 . As shown in FIG. 13B, the air flows to the rear side M2, passes through the inlet 24A (arrow A1), curves upward, passes the outlet 24B (arrow A2), and then curves further to the rear side. M2 and passes through the housing opening 23 (arrow A3). In other words, the ventilation passage 24 and the housing opening 23 form a labyrinth structure.

The labyrinth structure allows air to pass through while preventing water from passing through the door 21. Specifically, even when water passes through the inlet 24A, it does not bend in the ventilation path 24, making it difficult for the water to reach the housing opening 23.

Furthermore, the outlet 24B and the housing opening 23 are formed at a higher position than the inlet 24A. Such a structure makes it difficult for heavy fluid such as water to reach the upper outlet 24B and the housing opening 23 even when it passes through the inlet 24A. Therefore, water can be prevented from coming onto the heater 11 through the housing opening 23. Therefore, the washing machine 1 can employ a non-insulating type heater having a simpler structure as the heater 11.

(motion)
In the above configuration, an example of the operation of the washing machine 1 will be described with reference to FIG. 14. FIG. 14 is a flowchart showing the drying process of the washing machine 1.

The operation of the washing machine 1 includes a washing process, a rinsing process, a dehydration process, and a drying process. The control unit C sequentially controls each process.

The washing process is a process in which laundry is put into the washing tub 4 and water and detergent are supplied to the washing tub 4 to wash the laundry. The rinsing process is a process of supplying water to the washing tub 4 and rinsing the laundry. The dewatering process is a process in which water is discharged from the water tank 3 and the washing tub 4 is rotated at high speed to dehydrate the laundry.

The rotation direction of the washing tub 4 in the dewatering process is constant, and is a second rotation direction R2 that is opposite to the first rotation direction R1 shown in FIG. 9A. That is, the rotation direction of the washing tub 4 during the dewatering process is a direction in which fluid is difficult to flow into the exhaust air path 8. The rotation speed may be 400 rpm or more and 1000 rpm or less, and is preferably 550 rpm.

The drying process is a process in which drying air is applied to the dehydrated laundry to dry it while rotating the washing tub 4. The drying process includes one or more drying steps and loosening steps.

<Drying step>
As shown in FIG. 14, the control unit C obtains the drying time T1 according to the course selected by the user (step S10). The drying time T1 is, for example, 30 minutes, 1 hour, or 2 hours.

The control unit C starts rotating the washing tub 4 (step S11). The rotation direction is a first rotation direction R1.

Subsequently, the control unit C obtains the rotation speed of the washing tub 4 (step S12).

Next, the control unit C determines whether the rotation speed of the washing tub 4 is equal to or higher than a predetermined value, for example, 550 rpm (step S13). When the rotational speed becomes 550 rpm or higher, a flow of drying air is generated in the washing tub 4, making it possible to dry laundry.

If the rotation speed is 550 rpm or more (Yes in step S13), the control unit C turns on the heater 11 and maintains the rotation speed constant (step S14). Thereby, it becomes possible to heat the drying air flowing into the intake air passage 7, and further increase in the rotation speed of the washing tub 4 is suppressed.

If the rotation speed is less than 550 rpm (No in step S13), the control unit C returns to step S12.

Next, the control unit C starts a waiting time T2 of, for example, 30 minutes while the washing tub 4 is rotating and the heater 11 is ON (step S15).

When the waiting time T2 has elapsed, the control unit C turns off the heater 11 (step S16).

Subsequently, the control unit C stops the rotation of the washing tub 4 (step S17).

<Loosen step>
Subsequently, the control unit C executes a step of loosening the laundry (step S18). Due to the rotation during the waiting time T2, the laundry sticks to the inner wall of the washing tub 4. Therefore, by rotating the washing tub 4 in the opposite direction, that is, in the second rotation direction R2, the laundry can be peeled off from the inner wall and loosened. The rotation speed in the loosening step is lower than the rotation speed in the drying step, for example, 50 rpm.

Next, the control unit C determines whether the time T that has elapsed since the start of step S10 is equal to or longer than the drying time T1 (step S19). If the time T is longer than or equal to the drying time T1 (Yes in step S19), the control unit C ends the drying process. If the time T is shorter than the drying time T1 (No in step S19), the control unit C returns to step S11 and executes the second drying step.

(summary)
The features of the present disclosure will be described by summarizing the above description.

The washing machine 1 according to the present embodiment continuously takes in air from the external space 25 and exhausts it instead of having a circulation air path for drying air. Therefore, a housing opening 23 is provided in the housing 2 so that the external space 25 and the intake air passage 7 are communicated with each other.

In the washing machine 1, the intake port 71 of the intake air passage 7 and the housing opening 23 are separated and arranged so that the directions of air passing through each are opposite. With such a configuration, the drying air needs to be folded back between the housing opening 23 and the intake port 71. Such a structure makes it difficult for water to reach the heater 11. Even if the heater 11 is of a non-insulating type, the risk of electric shock due to water or bubbles B sprayed through the housing opening 23 is reduced. Therefore, while ensuring the safety of the washing machine 1, a non-insulating type heater 11 with a simpler structure can be used to realize the drying function, and the cost of the washing machine 1 can be reduced.

Furthermore, in the operation of the washing machine 1, by rotating the washing tub 4 in step S11, a swirling flow can be generated in the washing tub 4. The swirling flow allows drying air to flow through the drying air path 6. Therefore, the fan can be omitted from the configuration of the washing machine 1. Therefore, the washing machine 1 can have a simpler structure and lower cost.

(effect)
According to the washing machine 1 according to the first embodiment, the following effects can be achieved.

As described above, the washing machine 1 of the present embodiment includes the casing 2, the water tank 3, the washing tub 4 (rotating drum), the intake port 71, the intake air path 7, the heater 11, and the exhaust port 81. and an exhaust air passage 8. The housing 2 has a housing opening 23 that communicates with an internal space 26 . The water tank 3 is provided in the internal space 26. The washing tub 4 is provided in the water tub 3 so as to be rotatable around the rotation axis V0. The intake port 71 is provided to communicate with the internal space 26 and takes in drying air. The intake air passage 7 supplies drying air from the intake port 71 to the intake connection port 37 provided in the water tank 3 . The heater 11 is arranged in the intake air passage 7. The exhaust port 81 is formed in the housing 2, and the drying air is exhausted. The exhaust air path 8 supplies drying air to the exhaust port 81 from the exhaust connection port 38 provided along the outer periphery of the aquarium 3 . The direction in which the housing opening 23 opens (front side M1) is different from the direction in which the intake port 71 opens (backward side M2).

Such a configuration makes it difficult for water that has passed through the housing opening 23 to reach the heater 11. With respect to the non-insulating type heater 11, the risk of electric shock due to water or bubbles B sprayed through the housing opening 23 is reduced. Since the housing opening 23 and the intake port 71 are separated from each other, the lint flowing in through the housing opening 23 is difficult to reach the heater 11. Therefore, washing machine 1 can suppress adhesion of lint to heater 11 even when no filter is provided between intake port 71 and heater 11. Furthermore, since the washing machine 1 does not include a filter, the pressure loss of the drying air in the drying air path 6 is suppressed, and the drying performance is improved. In this way, the washing machine 1 can realize the drying function with a simpler structure and further reduce costs.

Furthermore, in the washing machine 1 of the present embodiment, the air intake port 71 is formed above the water tank 3 , and the heater 11 is arranged above the water tank 3 .

With such a configuration, water from the water tank 3 is less likely to come into contact with the heater 11.

Furthermore, in the washing machine 1 of the present embodiment, the housing 2 has an opening 20 (loading port) for loading clothes on the front surface 2A, and the housing opening 23 is formed above the opening 20 on the front surface 2A. . The intake port 71 opens toward the rear side M2, which is the direction away from the front surface 2A.

With such a configuration, drying air passes through the housing opening 23 to the rear side M2, and passes through the intake port 71 to the front side M1. That is, the drying air passes through the housing opening 23 and the intake port 71 in opposite directions. Therefore, the drying air that has passed through the housing opening 23 bends back and flows into the intake port 71. Therefore, it becomes even more difficult for water that has passed through the housing opening 23 to reach the heater 11.

Furthermore, in the washing machine 1 of the present embodiment, the intake air passage 7 extends from the intake port 71 toward the intake connection port 37 toward the front side M1.

With such a configuration, by providing the exhaust connection port 38 on the rear side M2, a configuration in which the intake connection port 37 is separated from the exhaust connection port 38 is possible. The washing machine 1 can improve drying efficiency by lengthening the path of drying air in the washing tub 4.

Furthermore, in the washing machine 1 of this embodiment, the heater 11 faces the air intake port 71.

With such a configuration, the washing machine 1 can separate the heater 11 from the housing opening 23 in the intake air passage 7 extending toward the front side M1.

Furthermore, in the washing machine 1 of this embodiment, the housing 2 has an opening 20 for throwing in clothes on the front surface 2A. The housing opening 23 is formed above the opening 20 on the front surface 2A. The opening 20 is provided with a door 21 that can be opened and closed. The door 21 has a door packing member 28 that is in close contact with the outer periphery of the opening 20. The door packing member 28 faces the housing opening 23 and forms a ventilation path 24 that communicates the outside of the housing 2 with the housing opening 23.

With such a configuration, the washing machine 1 can allow drying air to flow into the internal space 26. Moreover, since the opening 20 is sealed by the door packing member 28, water in the washing tub 4 is difficult to flow out from the opening 20 and into the ventilation passage 24 provided at the upper part of the door packing member 28.

Furthermore, in the washing machine 1 of this embodiment, the ventilation passage 24 is curved.

With such a configuration, the washing machine 1 can prevent water from passing through the ventilation path 24 and entering the internal space 26 while ensuring the inflow of drying air.

Further, in the washing machine 1 of the present embodiment, the ventilation passage 24 extends between an inlet 24A facing the outside of the housing 2 and an outlet 24B on the opposite side, and the inlet 24A opens laterally and the outlet 24B opens upward. The housing opening 23 opens laterally.

With such a configuration, the washing machine 1 can form a labyrinth structure with the ventilation passage 24 and the housing opening 23. Therefore, the washing machine 1 can further suppress water from passing through the ventilation path 24 and entering the internal space 26.

Furthermore, in the washing machine 1 of this embodiment, the heater 11 is of a non-insulating type.

With such a configuration, the washing machine 1 can use an inexpensive heater to further reduce costs.

Further, the washing machine 1 of this embodiment does not have a blowing mechanism arranged in the intake air path 7 or the exhaust air path 8.

With such a configuration, the washing machine 1 can omit an air blowing mechanism such as a fan, thereby further reducing costs.

Furthermore, in the washing machine 1 of the present embodiment, a flow of drying air is generated in the intake air passage 7 or the exhaust air passage 8 due to the rotation of the washing tub 4.

With such a configuration, the washing machine 1 can ensure the drying function even if an air blowing mechanism such as a fan is omitted.

Additionally, the washing machine 1 of this embodiment further includes a control unit C that executes a dehydration process and a drying process. The control unit C rotates the washing tub 4 in a first rotation direction R1 in the drying process, and rotates the washing tub 4 in a second rotation direction R2 opposite to the first rotation direction R1 in the dehydration process.

With such a configuration, the washing machine 1 can suppress the outflow of bubbles B and water through the exhaust air passage 8 during the dehydration process while ensuring exhaust air from the exhaust air passage 8 during the drying process.

Furthermore, in the washing machine 1 of this embodiment, the control unit C executes a first drying step and a second drying step in the drying process. Furthermore, the control unit C executes a loosening step of rotating the washing tub 4 in the second rotation direction R2 between the first drying step and the second drying step.

With such a configuration, the washing machine 1 can loosen laundry during the drying process. The washing machine 1 can suppress the formation of wrinkles on laundry.

In addition, in the washing machine 1 of the present embodiment, when viewed from the front in the extending direction of the rotating shaft V0, the exhaust connection port 38 is located above the horizontal plane including the rotating shaft V0, and when viewed from the first rotating direction R1. It is formed upstream from the top of the water tank 3. The exhaust air passage 8 extends upward.

With this configuration, the flow of drying air generated by the rotation of the washing tub 4 during the drying process can easily flow into the exhaust air path 8. In addition, the bubbles B generated during the dehydration process are less likely to flow into the exhaust air path 8.

Furthermore, in the washing machine 1 of this embodiment, the rotation axis V0 extends substantially horizontally.

With such a configuration, it becomes easier to secure a space above the washing tub 4 in the internal space 26 of the housing 2, compared to a structure in which the washing tub 4 is tilted. Therefore, the washing machine 1 can effectively utilize the space above the washing tub 4 to save space.

Further, in the washing machine 1 of the present embodiment, the intake air passage 7 is provided with a check valve 75 (first valve), and the exhaust air passage 8 is provided with a valve 85 (a first valve) of a type different from the check valve 75. 2 valves) are provided. Valve 85 is a ball valve.

With such a configuration, the check valve 75 can restrict the bubbles B flowing in the opposite direction to the air flow, and the valve 85 can restrict the bubbles B flowing in the same direction as the air.

Furthermore, in the washing machine 1 of this embodiment, the exhaust connection port 38 has a side 38A (first side) and a side 38B (second side) along the rotation axis V0. Side 38A is provided downstream of side 38B when viewed from second rotation direction R2 (rotation direction of the dehydration process). A rib 86 is formed in the exhaust connection port 38 and projects from the side 38A toward the side 38B.

With such a configuration, the washing machine 1 can suppress the bubbles B from reaching the exhaust port 81.

(Other embodiments)
Note that the present disclosure is not limited to the above embodiments, and can be implemented in various other ways.

In the embodiment, an example has been described in which the rotation directions of the dehydration step and the drying step are reversed, but the rotation directions of the dehydration step and the drying step are not limited to this. For example, the rotation direction of the dehydration step and the drying step may be the first rotation direction R1. In this case, the rib 86 protrudes from the downstream side 38A (first side) toward the upstream side 38B (second side) when viewed from the first rotation direction R1. Further, the rotation direction of the dehydration step and the drying step may be the second rotation direction R2. In this case, the rib 86 protrudes from the downstream side 38B toward the upstream side 38A when viewed from the second rotation direction R2.

In addition, in the embodiment, the washing tub 4 that is rotatably provided around the rotating shaft V0 that extends substantially horizontally has been described as an example of the rotating drum of the present disclosure. Not limited. For example, a washing tub rotatably provided around a rotating shaft extending in a direction having an inclination of more than 5 degrees from the horizontal is also included in an example of the rotating drum of the present disclosure.

Furthermore, in the embodiment, an example in which the drying step includes a loosening step has been described, but the structure of the drying step is not limited to this. For example, the drying process may not include the loosening step, but may include one or more drying steps in which the washing tub 4 (rotating drum) is rotated in the first rotation direction R1. Further, in the case where the drying process is composed of one or more drying steps, a loosening step as a process different from the drying process is performed after one drying step or between the plurality of drying steps. It's okay.

A washing machine in a first aspect includes a casing having a casing opening communicating with an internal space, a water tank provided in the internal space, and a rotating drum rotatably provided in the water tank around a rotation axis. Equipped with The washing machine also includes an intake port that is provided in communication with the internal space and that takes in drying air, and an intake air path that supplies drying air from the intake port to an intake connection port that is provided in the water tank. A heater arranged in the intake air path. In addition, the washing machine has an exhaust port formed in the housing through which drying air is exhausted, and an exhaust air path that supplies drying air from an exhaust connection port provided along the outer periphery of the water tank to the exhaust port. and. The direction in which the housing opening opens is different from the direction in which the intake port opens.

As a washing machine according to the second aspect, in the washing machine according to the first aspect, the air intake port is formed above the water tank, and the heater is arranged above the water tank.

In the washing machine according to the third aspect, in the washing machine according to the first or second aspect, the casing has an inlet for inserting clothes on the front surface, and the casing opening is formed above the inlet on the front surface. , the intake port opens toward the rear, which is the direction away from the front.

In the washing machine according to the fourth aspect, the intake air passage extends from the air intake port toward the air intake connection port to the front side.

As the washing machine in the fifth embodiment, in the washing machine in the fourth embodiment, the heater faces the air intake port.

As a washing machine according to a sixth aspect, in the washing machine according to any one of the first to fifth aspects, the casing has a slot for loading clothes on the front surface, and the housing opening has a slot for loading clothes on the front surface. A door is formed at the top and the input port is provided with a door that can be opened and closed. The door has a door packing member that is in close contact with the outer periphery of the input port, and the door packing member faces the casing opening and forms a ventilation path that communicates the outside of the casing with the casing opening.

As the washing machine in the seventh embodiment, in the washing machine in the sixth embodiment, the ventilation path is curved.

In the washing machine according to the eighth aspect, in the washing machine according to the seventh aspect, the ventilation passage extends between an inlet facing the outside of the housing and an outlet on the opposite side, and the inlet is opened laterally. However, the outlet opens upward, and the housing opening opens laterally.

In the washing machine according to any one of the first to eighth aspects as the washing machine according to the ninth aspect, the heater is of a non-insulating type.

As the washing machine in the tenth aspect, the washing machine in any one of the first to ninth aspects does not have an air blowing mechanism disposed in the intake air path or the exhaust air path.

As the washing machine according to the eleventh aspect, in the washing machine according to any one of the first to tenth aspects, a flow of drying air is generated in the intake air passage or the exhaust air passage by rotation of the rotating drum.

As the washing machine in the twelfth aspect, the washing machine in any one of the first to eleventh aspects further includes a control unit that executes a dewatering process and a drying process. The control unit rotates the rotary drum in a first rotation direction in the drying process, and rotates the rotary drum in a second rotation direction opposite to the first rotation direction in the dehydration process.

In the washing machine according to the twelfth aspect as the washing machine according to the thirteenth aspect, the control unit executes a first drying step and a second drying step in the drying process, and further performs the first drying step and the second drying step. In between, a loosening step is performed in which the rotating drum is rotated in a second rotation direction.

In the washing machine according to the fourteenth aspect, in the washing machine according to the twelfth aspect, when viewed from the front in the direction in which the rotation shaft extends, the exhaust connection port is located above a horizontal plane including the rotation shaft and in the first rotation direction. The exhaust air passage is formed upstream from the apex of the aquarium when viewed from above, and the exhaust air passage extends upward.

In the washing machine according to the fifteenth aspect, the rotating shaft extends substantially horizontally in the washing machine according to any one of the first to fourteenth aspects.

As a washing machine according to a sixteenth aspect, in the washing machine according to any one of the first to fifteenth aspects, the intake air path is provided with a first valve, and the exhaust air path is provided with a type of valve different from the first valve. A second valve is provided, the first valve being a check valve and the second valve being a ball valve.

In the washing machine according to any one of the first to sixteenth aspects as a washing machine according to a seventeenth aspect, the exhaust connection port has a first side and a second side along the rotation axis. The first side is provided downstream of the second side when viewed from the rotation direction of the dehydration process. A rib protruding from the first side toward the second side is formed in the exhaust connection port.

Although this disclosure has been fully described with reference to preferred embodiments and with reference to the accompanying drawings, various variations and modifications will be apparent to those skilled in the art. It is to be understood that such variations and modifications are included insofar as they do not depart from the scope of the disclosure as defined by the appended claims.

The washing machine of the present disclosure is useful, for example, as a domestic washing machine, a commercial washing machine, or any type of washer/dryer (eg, a domestic drum-type washing machine or a top-loading washing machine).

1 Washing machine 2 Housing 2A Front 3 Water tank 4 Washing tub 5 Washing agent supply unit 6 Drying air path 7 Intake air path 8 Exhaust air path 11 Heater 20 Opening 21 Door 23 Housing opening 24 Ventilation path 24A Inlet 24B Outlet 24C Claw portion 24D Opening 25 External space 26 Internal space 27 Door body 27A Opening 28 Door packing member 31 Opening 32 Accommodating part 33 Narrowing part 34 Cylindrical part 36 Bottom 37 Intake connection port 38 Exhaust connection port 38A Side 38B Side 41 Opening 71 Intake port 75 Back check Valve 79 Intake outlet 81 Exhaust port 82 First bending part 83 Second bending part 84 Bellows part 85 Valve 85A Constriction part 86 Rib 88 Connection part 89 Exhaust inlet A Arrow (air flow)
A1 Arrow (air flow)
A2 Arrow (air flow)
A3 Arrow (air flow)
B Foam C Control part C1 Arrow C2 Arrow K Width direction M Front-back direction M1 Front side M2 Back side R1 First rotation direction R2 Second rotation direction T Time T1 Drying time V0 Rotation axis

Claims

a housing having a housing opening that communicates with the internal space;
a water tank provided in the internal space;
a rotating drum rotatably provided in the water tank around a rotating shaft;
an intake port that is provided in communication with the internal space and allows drying air to be taken in;
an intake air path for supplying the drying air from the intake port to an intake connection port provided in the water tank;
a heater disposed in the intake air path;
an exhaust port formed in the casing, through which the drying air is exhausted;
an exhaust air path that supplies the drying air to the exhaust port from an exhaust connection port provided along the outer periphery of the water tank;
The direction in which the housing opening opens and the direction in which the intake port opens are different;
A washing machine characterized by:
the intake port is formed above the water tank,
the heater is placed above the water tank;
The washing machine according to claim 1, characterized in that:
The casing has an input port for inputting clothes on the front side,
The housing opening is formed above the input port on the front surface,
The intake port opens toward the rear, which is a direction away from the front surface.
The washing machine according to claim 1, characterized in that:
The intake air passage extends forward from the intake port toward the intake connection port.
The washing machine according to claim 3, characterized in that:
the heater faces the intake port;
The washing machine according to claim 4, characterized in that:
The casing has an input port for inputting clothes on the front side,
The housing opening is formed above the input port on the front surface,
The input port is provided with a door that can be opened and closed,
The door has a door packing member that is in close contact with the outer periphery of the input port,
The door packing member faces the casing opening and forms a ventilation path that communicates the outside of the casing with the casing opening.
The washing machine according to claim 1, characterized in that:
the ventilation passage is curved;
The washing machine according to claim 6, characterized in that:
The ventilation passage extends between an entrance facing the outside of the housing and an exit on the opposite side,
the inlet opens laterally; the outlet opens upward;
the housing opening opens in the lateral direction;
The washing machine according to claim 7, characterized in that:
the heater is a non-insulated type;
The washing machine according to claim 1, characterized in that:
It does not have an air blowing mechanism disposed in the intake air path or the exhaust air path,
The washing machine according to claim 1, characterized in that:
The rotation of the rotating drum generates a flow of the drying air in the intake air path or the exhaust air path.
The washing machine according to claim 1, characterized in that:
It further includes a control unit that executes a dehydration process and a drying process,
The control unit rotates the rotary drum in a first rotation direction in the drying step, and rotates the rotary drum in a second rotation direction opposite to the first rotation direction in the dehydration step.
The washing machine according to claim 1, characterized in that:
The control unit executes a first drying step and a second drying step in the drying step,
Furthermore, the control unit executes a loosening step of rotating the rotating drum in the second rotation direction between the first drying step and the second drying step.
The washing machine according to claim 12, characterized in that:
In a front view seen from the extending direction of the rotating shaft, the exhaust connection port is formed above a horizontal plane including the rotating shaft and upstream from the apex of the water tank when viewed from the first rotating direction,
the exhaust air passage extends upward;
The washing machine according to claim 12, characterized in that:
The rotation axis extends substantially horizontally.
The washing machine according to claim 1, characterized in that:
A first valve is provided in the intake air passage,
The exhaust air path is provided with a second valve of a different type from the first valve,
The first valve is a check valve, and the second valve is a ball valve.
The washing machine according to any one of claims 1 to 15.
The exhaust connection port has a first side and a second side along the rotation axis,
The first side is provided downstream of the second side when viewed from the rotation direction of the dehydration step,
A rib protruding from the first side toward the second side is formed in the exhaust connection port.
The washing machine according to claim 1, characterized in that: