Washing machine

Abstract

A washing machine according to the present disclosure is provided with: a cabinet having a cabinet opening communicating 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 about a rotational axis. In addition, the washing machine is provided with: an air inlet which is provided so as to communicate with the internal space and which sucks in drying air; an air inlet path for supplying drying air from the air inlet to an air inlet connection port provided in the water tank; and a heater disposed in the intake air passage. In addition, the washing machine is provided with: an exhaust port which is formed in the cabinet and discharges drying air; and an exhaust air path for supplying drying air to the exhaust port from an exhaust connection port provided along the outer periphery of the water tank. In addition, the opening direction of the machine shell opening is different from the opening direction of the air inlet.

Description

Technical Field

[0001] The present disclosure relates to a washing machine. Background Art

[0002] For example, Patent Document 1 discloses a washing tub for storing laundry, a heat pump device, and a blower fan.

[0003] The washing machine described in Patent Document 1 realizes a drying function by using a heat pump device and a blower fan. The washing tub and the heat pump device are connected by a circulating air path. The air heated by the heat pump device is circulated between the washing tub and the heat pump device by the blower fan to dry the laundry.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2011-136075 Summary of the invention

[0007] However, since a heat pump device and a blower fan are provided to realize a drying function, the structure of the washing machine becomes complicated and the cost of the washing machine increases.

[0008] Therefore, the present disclosure provides a washing machine that can achieve a drying function with a simpler structure and further reduce the cost of the washing machine.

[0009] A washing machine of one embodiment of the present disclosure comprises: a casing having a casing opening communicating with an internal space; a water tank disposed in the internal space; and a rotating drum disposed in the water tank so as to be rotatable around a rotation axis. In addition, the washing machine comprises: an air inlet disposed in communication with the internal space and sucking in drying air; an air inlet duct supplying drying air from the air inlet to an air inlet connection port disposed in the water tank; and a heater disposed in the air inlet duct. In addition, the washing machine comprises: an exhaust port formed in the casing and discharging drying air; and an exhaust duct supplying drying air from an exhaust connection port disposed along the outer circumference of the water tank to the exhaust port. Furthermore, the direction in which the casing opening opens is different from the direction in which the air inlet opens.

[0010] A washing machine according to an aspect of the present disclosure can achieve a drying function with a simpler structure and further reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1A It is a perspective view of a washing machine according to an embodiment of the present disclosure.

[0012] Figure 1B It is a perspective view of the washing machine according to the embodiment.

[0013] Figure 1C It is a top view of the washing machine according to the embodiment.

[0014] Figure 1D It is a cross-sectional view of the washing machine according to the embodiment.

[0015] Figure 2 It is a perspective view of a part of the washing machine according to the embodiment.

[0016] Figure 3 This is a cross-sectional view of a part of the washing machine according to the embodiment as viewed in the width direction.

[0017] Figure 4 It is a cross-sectional view of a part of the washing machine according to the embodiment as viewed from the front side.

[0018] Figure 5 It is a perspective view of the air intake duct of the washing machine according to the embodiment.

[0019] Figure 6 It is a cross-sectional view of the air intake duct of the washing machine according to the embodiment.

[0020] Figure 7 It is a perspective view of the exhaust air duct of the washing machine according to the embodiment.

[0021] Figure 8 It is a cross-sectional view of the exhaust air duct of the washing machine according to the embodiment.

[0022] Fig. 9A It is a diagram showing the connection between the exhaust air duct and the water tub of the washing machine according to the embodiment.

[0023] Fig. 9B It is a diagram showing the connection between the exhaust air duct and the water tub of the washing machine according to the embodiment.

[0024] Fig. 10A It is an exploded view of the front surface structure of the washing machine according to the embodiment.

[0025] Fig. 10B It is an exploded view of the front surface structure of the washing machine according to the embodiment.

[0026] Fig.11A It is an enlarged view of the door sealing member of the washing machine according to the embodiment.

[0027] Fig. 11B It is an enlarged view of the door sealing member of the washing machine according to the embodiment.

[0028] Fig. 12A It is an enlarged view of the casing of the washing machine according to the embodiment.

[0029] Fig. 12B It is an enlarged view of the casing of the washing machine according to the embodiment.

[0030] Fig.13A It is an enlarged cross-sectional view of a door and a casing of the washing machine according to the embodiment.

[0031] Fig. 13B It is an enlarged cross-sectional view of the ventilation path of the washing machine according to the embodiment.

[0032] Fig.14 It is a flowchart of the drying process of the washing machine in the embodiment. DETAILED DESCRIPTION

[0033] (Implementation Method)

[0034] A washing machine 1 as an embodiment of the present disclosure will be described. In the present disclosure, directions are defined based on the installation state of the washing machine when it is normally used. For example, in the following, there is a Figure 1A The vertical direction in the installation state of washing machine 1 shown is described as the up-down direction. In addition, the horizontal direction when viewed from the front surface 2A side in the installation state may be described as the left-right direction.

[0035] [Overall structure]

[0036] Figure 1A and Figure 1B It is a perspective view showing the structure of washing machine 1 according to the embodiment of the present disclosure. Figure 1A is a perspective view of the washing machine 1 with the door 21 closed. Figure 1B It is a perspective view of washing machine 1 in a state where door 21 is opened. Figure 1C It is a plan view showing the structure of washing machine 1. Figure 1D It is a cross-sectional view showing the structure of washing machine 1. Figure 2 It is a perspective view showing a partial structure of washing machine 1.

[0037] like Figure 1A to Figure 1D As shown, the washing machine 1 includes a housing 2, a water tank 3 ( Figure 1D )、Sink 4( Figure 1D )、detergent supply unit 5、drying air duct 6、heater 11( Figure 1C ) and control unit C.

[0038] <Case>

[0039] like Figure 1A and Figure 1B As shown, the housing 2 is a member that forms the appearance of the washing machine 1. Figure 1C and Figure 1D As shown, the casing 2 defines an internal space 26. The internal space 26 accommodates the water tank 3, the washing tank 4, the detergent supply unit 5, and the drying air duct 6.

[0040] like Figure 1B As shown, an opening 20 communicating with the water tank 3 and a freely openable and closable door 21 covering the opening 20 are provided on the front surface 2A of the housing 2. The opening 20 corresponds to an example of an inlet of the present disclosure.

[0041] <Sink>

[0042] like Figure 1D As shown, the water tank 3 is a substantially cylindrical member provided inside the housing 2 and having one end closed to store washing water. The water tank 3 has a cylinder portion 34 and a bottom portion 36 that closes one end of the cylinder portion 34. The water tank 3 has an opening 31 opposite to the bottom portion 36 at a position facing the opening 20. The water tank 3 may also be referred to as an outer tank.

[0043] <Sink>

[0044] The washing tub 4 is a generally cylindrical member that is configured to be rotatable around the rotation axis V0 inside the water tub 3 and to accommodate laundry such as clothes. The washing tub 4 is rotated, for example, by a motor. The washing tub 4 has an opening 41 for inserting laundry at a position facing the opening 20. The washing tub 4 may also be referred to as a rotating drum or an inner tub.

[0045] In addition, a plurality of through holes (not shown) communicating with the water tank 3 are formed in the washing tub 4. The through holes enable air, water, and detergent to move between the water tank 3 and the washing tub 4.

[0046] The rotation axis V0 extends approximately horizontally. In the present disclosure, "extending approximately horizontally" refers to the case where it extends in a direction that is inclined within 5° relative to the horizontal. In addition, the horizontal direction along the rotation axis V0 is set as the front-to-back direction M, and the horizontal direction orthogonal to the rotation axis V0 is set as the width direction K. The front-to-back direction M has a front side M1 toward the opening 41 and a rear side M2 ​​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 also be said to be a direction away from the front surface 2A.

[0047] <Detergent supply unit>

[0048] like Figure 1C and Figure 1D As shown, the detergent supply unit 5 is a unit that supplies washing treatment agents such as liquid detergent, powder detergent, and solid detergent to the washing tank 4. Liquid detergent refers to liquid detergent used to wash clothes and other laundry. Liquid detergent may also include detergent, softener, and neutral detergent.

[0049] <Dry air path>

[0050] like Figure 1C and Figure 2As shown in FIG. 1 , the drying air duct 6 is a duct provided in the internal space 26 of the housing 2 for allowing drying air to flow toward the water tank 3 and the washing tank 4. The drying air duct 6 has a flow path formed therein for the drying air to pass through. The drying air is introduced from the internal space 26 of the housing 2 to the water tank 3 and the washing tank 4 through the drying air duct 6, and is discharged from the water tank 3 and the washing tank 4 to the outside of the housing 2 ( Figure 2 arrow A).

[0051] The drying air passage 6 is divided into an intake air passage 7 and an exhaust air passage 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 tank 4, and the drying air passes through the intake air passage 7, the water tank 3 and the washing tank 4, and the exhaust air passage 8 in sequence. The intake air passage 7 connects the internal space 26 of the housing 2 with the water tank 3 and supplies drying air to the water tank 3. The exhaust air passage 8 connects the water tank 3 with the outside of the housing 2 and exhausts drying air from the water tank 3.

[0052] <Heater>

[0053] Heater 11( Figure 1C ) is a heating component that is provided inside the air intake passage 7 and heats the drying air flowing into the air intake passage 7. In the embodiment, the heater 11 is a non-insulated heater. The heater 11 does not have an insulating cover that covers the heating part and electrically connects the heating part to the power supply, and has a simpler structure. The heater 11 is, for example, a nickel-chromium electric heating wire heater.

[0054] <Control Department>

[0055] like Figure 1A and Figure 1B As shown, the control unit C is a component for controlling the operation of the washing machine 1. Alternatively, the control unit C may include, for example, a memory (not shown) storing a program and a processing circuit (not shown) corresponding to a processor such as a CPU (Central Processing Unit), and the above control is realized by the processor executing the program. In addition, the control unit C may also be a dedicated hardware circuit designed to realize the above control.

[0056] Here, the structure of the housing 2 is described in more detail. Figure 1B As shown, a housing opening 23 is formed in a portion of the front surface 2A of the housing 2 located above the opening 20. Figure 1D As shown, 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 is open toward the front side M1.

[0057] like Figure 1A , Figure 1B and Figure 1DAs shown, the door 21 is formed with a ventilation path 24 at a position facing the housing opening 23. The ventilation path 24 passes through the door 21, allowing air to pass through the door 21. When the door 21 is closed, the ventilation path 24 and the housing opening 23 are connected, and air from the external space 25 flows into the housing 2 through the ventilation path 24 and the housing opening 23 in sequence.

[0058] On the other hand, in a state where the door 21 is opened, the ventilation path 24 and the cabinet opening 23 are separated.

[0059] Reference Figure 2 and Figure 3 The flow of air flowing into the casing 2 will be described. Figure 3 It is a cross-sectional view showing a partial structure of the washing machine 1 as viewed from the width direction K.

[0060] like Figure 2 As shown, the drying air flowing into the casing 2 passes through the internal space 26, the air inlet duct 7, the water tank 3, the washing tank 4, and the exhaust duct 8 in sequence and is discharged to the external space 25 of the casing 2. The drying air passes through the casing 2 in one path, which is different from the case where the air circulates in the casing 2.

[0061] More specifically, the drying air flows from the outer space 25 of the casing 2 through the casing opening 23 into the portion of the inner space 26 located above the water tank 3. The air flowing into the inner space 26 flows toward the rear side M2, and then bends in a folded manner and flows into the air intake passage 7. In the present disclosure, "bending in a folded manner" means that the direction of travel before the bend and the direction of travel after the bend intersect at an angle of at least 45 degrees. In the present embodiment, the air flowing into the inner space 26 bends 180 degrees and flows into the air intake passage 7.

[0062] like Figure 3 As shown, the drying air in the air intake passage 7 is heated by the heater 11, and the heated drying air flows from the air intake passage 7 into the water tub 3 and the washing tub 4. In the washing tub 4, the drying air contacts the wet laundry and dries the laundry.

[0063] The drying air in washing tub 4 absorbs moisture from the laundry and is then exhausted to external space 25 of casing 2 through exhaust air duct 8 .

[0064] Here, the structure of the water tank 3 through which the drying air passes will be described in more detail.

[0065] like Figure 3As shown, the cylindrical portion 34 of the water tank 3 has a storage portion 32 for storing the washing tank 4 and a narrow portion 33 located at the front side M1 of the storage portion 32. The narrow portion 33 forms the opening 31 and has a shape that decreases in diameter toward the opening 31. Therefore, the narrow portion 33 has a radius smaller than the radius of the storage portion 32.

[0066] Exhaust connection port 38 is formed along the outer periphery of water tub 3 in storage section 32. Exhaust connection port 38 is an opening for connecting exhaust air passage 8 with water tub 3. Drying air flows from water tub 3 into exhaust air passage 8 through exhaust connection port 38.

[0067] The narrow portion 33 is provided with an air intake connection port 37 along the outer periphery of the water tub 3. The air intake connection port 37 is an opening for connecting the air intake passage 7 with the water tub 3. Dry air flows from the air intake passage 7 into the water tub 3 through the air intake connection port 37. The air intake connection port 37 is formed at a position closer to the front side M1 than the air exhaust connection port 38.

[0068] According to such a structure, the air inlet connection port 37 and the air outlet connection port 38 are far apart in the front-rear direction M. Therefore, the path of the drying air passing through the water tub 3 (ie, the washing tub 4) can be made longer, and the drying air can easily contact more laundry.

[0069] Furthermore, the intake connection port 37 is formed at a position where the distance from the rotation axis V0 is closer than the distance from the exhaust connection port 38 to the rotation axis V0 .

[0070] Here, refer to Figure 4 The principle of generating the air flow in the drying process will be described. Figure 4 It is a cross-sectional view showing a partial structure of the washing machine 1 as viewed from the front side M1.

[0071] like Figure 4 As shown, the washing tub 4 rotates in a first rotation direction R1 around a rotation axis V0 in the drying process.

[0072] If the rotation speed of the washing tub 4 is greater than a predetermined value, for example, greater than 550 rpm, a swirling flow along the first rotation direction R1 is generated in the washing tub 4. The swirling flow may also be a forced vortex. The forced vortex is used to form a velocity distribution of air in the washing tub 4. Specifically, the farther from the rotation axis V0, the greater the velocity of the air.

[0073] In the washing machine 1, the exhaust connection port 38 is formed at a position where the distance from the rotation axis V0 is farther than the distance from the intake connection port 37 to the rotation axis V0, so the air near the exhaust connection port 38 has a higher speed than the air near the intake connection port 37. Therefore, the air easily flows out through the exhaust connection port 38.

[0074] When the air flows out through the exhaust connection port 38, a negative pressure state is formed in the washing tub 4. The air is sucked into the washing tub 4 through the intake connection port 37 by the negative pressure.

[0075] Based on such a principle, in washing machine 1 without a fan, forced vortex is generated by the rotation of washing tub 4, thereby also forming a pressure difference in drying air duct 6 to generate air flow.

[0076] When the water tank 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 water tank 3. The lower end of the exhaust air passage 8 is connected to the exhaust connection port 38. Therefore, the exhaust connection port 38 is also formed in the upper right portion of the outer periphery of the water tank 3. In other words, when viewed from the first rotation direction R1 in the drying process, the exhaust connection port 38 is formed in the upper right fan-shaped portion upstream of the vertex of the water tank 3.

[0077] The flow of air near the exhaust connection port 38 (arrow C1) has a velocity component in the same direction as the direction (upward) in which the exhaust air duct 8 extends. On the other hand, the flow of air at the fan-shaped portion on the upper left of the water tank 3 (arrow C2) has a velocity component in the opposite direction to the direction in which the exhaust air duct 8 extends. In the washing machine 1, the exhaust connection port 38 is formed on the right side, thereby effectively utilizing the centrifugal force based on the washing tank 4 to promote the outflow of air compared to the case where the exhaust connection port 38 is formed on the left side.

[0078] Next, refer to Figure 3 , Figure 5 and Figure 6 The structure of the air intake passage 7 will be described. Figure 5 It is a perspective view showing the structure of the intake air duct 7 . Figure 6 It is a cross-sectional view showing the structure of the intake air passage 7 .

[0079] like Figure 3 As shown, the air intake passage 7 extends obliquely downward along the outer circumference of the water tank 3 .

[0080] like Figure 5 As shown, the air inlet passage 7 extends from the air inlet port 71 to the air inlet outlet 79. The air inlet port 71 is an opening formed in the portion of the internal space 26 located above the water tank 3 for allowing drying air to flow into the air inlet passage 7. The air inlet outlet 79 is an opening communicating with the air inlet connection port 37.

[0081] The air inlet 71 opens toward the rear side M2, and the direction of the opening is different from the housing opening 23 that opens toward the front side M1 as described above. In addition, the air inlet duct 7 extends from the air inlet 71 toward the front side M1. Therefore, in the air inlet duct 7, the drying air flows toward the front side M1. Figure 3As shown, the direction in which the drying air passes through the air inlet 71 (front side M1) and the direction in which the drying air passes through the housing opening 23 (rear side M2) are opposite. In addition, the air inlet 71 and the housing opening 23 are separated from each other. Therefore, in order for the drying air to flow into the air inlet 71, the drying air needs to be bent approximately 180° in the portion of the internal space 26 located between the housing opening 23 and the air inlet 71.

[0082] To summarize the arrangement relationship 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 .

[0083] like Figure 3 and Figure 6 As shown, the heater 11 is accommodated in the flow path formed by the air intake duct 7. The air intake port 71 opens toward the rear side M2, so that it is possible to prevent liquids such as water and foam sprayed through the door 21 from hitting the heater 11. Furthermore, lint and dust passing through the housing opening 23 are also unlikely to reach the heater 11. Therefore, even if a filter is not provided between the air intake port 71 and the heater 11, it is possible to prevent lint from adhering to the heater 11.

[0084] The heater 11 is housed in the air intake passage 7 so as to face the air intake port 71. According to this arrangement, the heater 11 can be kept away from the air intake connection port 37, and the foam B and water flowing back from the water tank 3 are not easily splashed onto the heater 11. Furthermore, the air intake port 71 is formed above the water tank 3, and the heater 11 is also arranged above the water tank 3, so that even in an abnormal state where water leaks from the water tank 3, water is not easily splashed onto the heater 11.

[0085] like Figure 6 As shown, in the flow path formed by the air intake passage 7, a check valve 75 is provided downstream of the heater 11. The check valve 75 is a structure that restricts the flow of air passing through the air intake passage 7 in one direction. The check valve 75 is opened by the flow of air from the air intake port 71 toward the air intake outlet 79, and is closed by the flow of air from the air intake outlet 79 toward the air intake port 71. According to such a structure, the check valve 75 can suppress the backflow of water and foam B from the water tank 3 through the air intake passage 7. In addition, the check valve 75 is equivalent to an example of the first valve of the present disclosure.

[0086] Next, refer to Figure 3 , Figures 7 to 9B The structure of the exhaust air duct 8 will be described. Figure 7 It is a perspective view showing the structure of the exhaust air duct 8 . Figure 8 It is a cross-sectional view showing the structure of the exhaust air duct 8 . Fig. 9A and Fig. 9BIt is a diagram showing the connection between the exhaust air duct 8 and the water tank 3 .

[0087] like Figure 3 As shown, the exhaust air duct 8 extends upward from the water tank 3.

[0088] like Figure 7 As shown in FIG. 1 , the exhaust air duct 8 has a curved shape. More specifically, the exhaust air duct 8 is arranged along the direction from the water tank 3 ( Figure 3 ) in the order of separation. The connecting portion 88, the first bent portion 82, the bellows portion 84 and the second bent portion 83 are provided. The connecting portion 88 is a member connected to the water tank 3 and extends upward. The first bent portion 82 bends the exhaust air duct 8 from the upper direction along the front-to-back direction M (toward the rear side M2), and the second bent portion 83 bends the exhaust air duct 8 from the front-to-back direction M to the upper direction. The bellows portion 84 is a member connecting the first bent portion 82 and the second bent portion 83 in the front-to-back direction M, and is a bellows structure that mitigates vibration. The first bent portion 82 and the second bent portion 83 can be used to extend the exhaust air duct 8 upward and to arrange the air outlet (exhaust port 81 described later) on the rear side M2. The bellows portion 84 can be used to suppress the vibration of the water tank 3 from being transmitted to the casing 2.

[0089] 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 an opening that is provided in a state of protruding from the housing 2 toward the rear side M2 ​​( Figure 1C ) is used to discharge drying air from the exhaust air duct 8.

[0090] The exhaust port 81 opens upward. Therefore, the drying air is discharged upward from the housing 2. The discharged air is humidified air because it is heated by the heater 11 and absorbs moisture from the clothes. By discharging such air upward, it is possible to prevent the air from hitting the surrounding walls of the washing machine 1 or other equipment.

[0091] The exhaust port 81 has a width direction K ( Figure 1C ) is a shape that is longer in the longitudinal direction. According to such a structure, the washing machine 1 can reduce the size in the front-rear direction M and can ensure a larger exhaust volume.

[0092] like Figure 8 As shown in FIG. 1 , a valve 85 is housed in the flow path formed by the exhaust air path 8. The valve 85 is a structure that allows air to pass toward the exhaust port 81 and restricts the passage of the bubbles B.

[0093] The valve 85 is, for example, a ball valve that can move in the up and down directions. In this case, in the exhaust air passage 8, a narrow portion 85A in which the flow path cross-section is narrowed is formed downstream of the valve 85. The valve 85 can be raised and lowered between an open position away from the narrow portion 85A and a closed position in which the narrow portion 85A is blocked. The valve 85 is usually in the open position due to gravity. When air flows into the exhaust air passage 8, the force of the air is smaller than the buoyancy required to lift the valve 85, so the valve 85 stays in the open position. On the other hand, when foam enters the exhaust air passage 8, the foam B lifts the valve 85, and the valve 85 rises to the closed position. Therefore, it is possible to suppress the foam B from reaching the exhaust port 81. In addition, the valve 85 is equivalent to an example of the second valve disclosed in the present invention.

[0094] In the exhaust air passage 8, the flow of the fluid to be prevented, such as foam B and water, and the flow of the drying air are in the same direction. In the intake air passage 7, the flow of the fluid to be prevented, such as foam B and water, and the flow of the drying air are in opposite directions. Therefore, the valve 85 is a valve of a different type from the check valve 75. In the present embodiment, the valve 85 is a ball valve, and the check valve 75 is a swing check valve.

[0095] like Fig. 9A As shown, the washing tub 4 rotates in the first rotation direction R1 during the drying process.

[0096] like Fig. 9A and Fig. 9B As shown, 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 in a manner that partially blocks the exhaust inlet 89. The direction in which the rib 86 protrudes is the 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. In addition, the side 38A is equivalent to an example of the first side of the present disclosure, and the side 38B is equivalent to an example of the second side of the present disclosure.

[0097] like Fig. 9A As shown, the ribs 86 can be used to limit where the bubbles B rising through the exhaust inlet 89 hit the valve 85 .

[0098] When the washing tub 4 rotates, the bubbles B move along the first rotation direction R1. Therefore, if the ribs 86 are not formed, a part of the bubbles B moving along the first rotation direction R1 hits the edge 38A and rises along the side of the exhaust air passage 8 extending from the edge 38A. In this case, the bubbles B hit the end of the valve 85, so the valve 85 cannot be fully lifted, and the bubbles B may pass between the side of the exhaust air passage 8 and the valve 85 and reach the exhaust port 81.

[0099] On the other hand, when the rib 86 is formed at the exhaust connection port 38, the foam B hits the rib 86 and rises from the lower side near the center of the valve 85, and hits the center of the valve 85. In this case, the valve 85 is more likely to be lifted and the exhaust air passage 8 is more likely to be closed than when the foam B hits the periphery of the valve 85. Therefore, it is possible to suppress the foam B from reaching the exhaust port 81.

[0100] By configuring the exhaust air passage 8 in this manner, it is possible to adopt a structure that facilitates the flow of air into the exhaust air passage 8 by utilizing the rotation in the first rotation direction R1 , and it is possible to suppress the entry of fluids other than air.

[0101] Next, refer to Figures 10A to 13B The structures of the ventilation path 24 of the door 21 and the casing opening 23 will be described. Fig. 10A and Fig. 10B It is an exploded view showing the front structure of washing machine 1. Fig.11A and Fig. 11B It is an enlarged view showing the structure of the door sealing member 28 of the door 21. Fig. 12A and Fig. 12B It is an enlarged view showing the structure of the casing 2. Fig.13A It is an enlarged cross-sectional view showing the structure of the door 21 and the casing 2. Fig. 13B It is an enlarged cross-sectional view of the ventilation path 24 .

[0102] like Fig. 10A and Fig. 10B As shown, the door 21 has a door body 27 and a door sealing 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 opening 20 in its entirety. The door sealing member 28 is a member that allows the door body 27 to fit closely to a portion of the front surface 2A that contacts the outer periphery of the opening 20. The door sealing member 28 is formed of resin. Therefore, in the washing machine 1, the sealing property of the door 21 can be ensured, and the aesthetic property can be improved.

[0103] An opening 27A is formed at the upper portion of the door body 27, and a ventilation path 24 is formed at the upper portion of the door sealing member 28. The opening 27A is an opening for protruding the ventilation path 24. The ventilation path 24 forms a flow path that penetrates the door sealing member 28 and is used to introduce air from the external space 25 into the interior of the casing 2.

[0104] like Fig.11A As shown, on the front side M1 of the door sealing member 28 ( Fig. 10A ) An inlet 24A of the ventilation path 24 is formed. The inlet 24A protrudes toward the front side M1 and opens in the front-rear direction M.

[0105] like Fig. 11B As shown, on the rear side M2 ​​of the door sealing member 28 ( Fig. 10B) is formed with an outlet 24B of the ventilation path 24. The outlet 24B opens upward. Therefore, the fluid flowing into the ventilation path 24 is bent and flows out from the ventilation path 24.

[0106] A claw portion 24C is formed around the outlet 24B so as to protrude from the surface of the door sealing member 28 toward the rear side M2. The claw portion 24C is a member that engages with the housing 2.

[0107] If you return Fig. 10A and Fig. 10B , a housing opening 23 is formed on the front surface 2A of the housing 2 at a position facing the ventilation path 24. The housing opening 23 opens in a lateral direction (eg, front-rear direction M).

[0108] like Fig. 12A and Fig. 12B As shown, a plurality of openings 24D are formed around the housing opening 23. The openings 24D are used to engage with the claws 24C to match the housing opening 23. By engaging the claws 24C with the openings 24D and the claws 24C with the housing opening 23, the door 21 can be more reliably positioned relative to the housing 2, and the housing opening 23 and the ventilation path 24 can be communicated.

[0109] like Fig.13A As shown in FIG. 1 , when the door 21 is engaged with the housing 2, the ventilation path 24 and the housing opening 23 are connected. The air in the external space 25 of the housing 2 flows into the internal space 26 through the ventilation path 24 and the housing opening 23 due to the negative pressure in the internal space 26. Fig. 13B As shown, the air flows toward the rear side M2 ​​and passes through the inlet 24A (arrow A1), bends and flows upward and passes through the outlet 24B (arrow A2), further bends and flows toward the rear side M2 ​​and passes through the housing opening 23 (arrow A3). In other words, the ventilation path 24 and the housing opening 23 form a labyrinth structure.

[0110] The labyrinth structure allows air to pass through, and can suppress water from passing through door 21. Specifically, even if water passes through inlet 24A, it does not bend in ventilation path 24, and water is unlikely to reach casing opening 23.

[0111] In addition, the outlet 24B and the housing opening 23 are formed at a higher position than the inlet 24A. According to such a structure, even if a heavy fluid such as water passes through the inlet 24A, it is difficult to reach the upper outlet 24B and the housing opening 23. Therefore, it is possible to suppress the situation where water passes through the housing opening 23 and splashes onto the heater 11. Therefore, in the washing machine 1, a non-insulated heater with a simpler structure can be used as the heater 11.

[0112] (action)

[0113] In the above structure, refer to Fig.14 An example of the operation of washing machine 1 will be described. Fig.14 1 is a flowchart showing a drying process of washing machine 1 .

[0114] 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 controls each process sequentially.

[0115] The washing process is a process in which laundry is placed in washing tub 4 and water and detergent are supplied to washing tub 4 to wash the laundry. The rinsing process is a process in which water is supplied to washing tub 4 to rinse the laundry. The dehydration process is a process in which water is drained from water tub 3 and washing tub 4 is rotated at a high speed to dehydrate the laundry.

[0116] The rotation direction of the washing tank 4 in the dehydration process is constant. Fig. 9A The second rotation direction R2 is opposite to the first rotation direction R1 shown. That is, the rotation direction of the washing tub 4 in the dehydration process is a direction in which the fluid is difficult to flow into the exhaust air duct 8. The rotation speed is preferably 400 rpm or more and 1000 rpm or less, and is preferably 550 rpm.

[0117] The drying process is a process of drying the dehydrated laundry by bringing drying air into contact with the dehydrated laundry while rotating the washing tub 4. The drying process includes one or more drying steps and a loosening step.

[0118] <Drying Step>

[0119] like Fig.14 As shown, the control unit C acquires the drying time T1 corresponding to the program selected by the user (step S10). The drying time T1 is, for example, any one of 30 minutes, 1 hour, and 2 hours.

[0120] The control unit C starts the rotation of the washing tub 4 (step S11). The rotation direction is the first rotation direction R1.

[0121] Next, the control unit C acquires the rotation speed of the washing tub 4 (step S12).

[0122] Next, the control unit C determines whether the rotation speed of washing tub 4 is a predetermined value, for example, 550 rpm or more (step S13). If the rotation speed is 550 rpm or more, a flow of drying air is generated in washing tub 4, and the laundry can be dried.

[0123] When the rotation speed is 550 rpm or more (YES in step S13), the controller C turns on the heater 11 and maintains the rotation speed constant (step S14). This heats the drying air flowing into the air intake passage 7 and suppresses further increase in the rotation speed of the washing tub 4.

[0124] When the rotation speed is less than 550 rpm (NO in step S13 ), the control unit C returns to step S12 .

[0125] Next, the control unit C starts a waiting time T2 of, for example, 30 minutes, with the washing tub 4 rotating and the heater 11 turned on (step S15).

[0126] When the waiting time T2 has elapsed, the control unit C turns off the heater 11 (step S16).

[0127] Next, the control unit C stops the rotation of the washing tub 4 (step S17).

[0128] <Steps for loosening and untangling clothes>

[0129] Next, the control unit C executes a step of loosening the laundry (step S18). Due to the rotation during the waiting time T2, the laundry adheres to the inner wall of the washing tub 4. Then, by rotating the washing tub 4 in the opposite direction, that is, the second rotation direction R2, the laundry can be peeled off from the inner wall and loosened. The rotation speed in the loosening process is lower than the rotation speed in the drying step, for example, 50 rpm.

[0130] Next, the control unit C determines whether the time T that has passed since the start of step S10 is greater than the drying time T1 (step S19). If the time T is greater than 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 performs the second drying step.

[0131] (Summarize)

[0132] The above description is summarized to describe the features of the present disclosure.

[0133] In the washing machine 1 of this embodiment, air is continuously sucked and exhausted from the external space 25 instead of having a circulation duct for drying air. Therefore, the casing 2 is provided with a casing opening 23 so that the external space 25 and the air intake duct 7 communicate with each other.

[0134] In the washing machine 1, the air inlet 71 of the air inlet duct 7 is separated from the casing opening 23, and is configured so that the directions of the air passing through the two ports are opposite. According to such a structure, the drying air needs to be turned back between the casing opening 23 and the air inlet 71. According to such a structure, water does not easily reach the heater 11. Even if the heater 11 is a non-insulated type, the risk of electric shock caused by the water and bubbles B sprayed through the casing opening 23 is small. Therefore, the safety of the washing machine 1 can be ensured, and a non-insulated heater with a simpler structure can be used as the heater 11 to achieve the drying function, which can reduce the cost of the washing machine 1.

[0135] In addition, during 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 can be used to make the drying air flow in the drying air duct 6. Therefore, the fan can be omitted from the structure of the washing machine 1. Therefore, the structure of the washing machine 1 can be made simpler, and the cost can be further reduced.

[0136] (Effect)

[0137] According to the washing machine 1 of the first embodiment, the following effects can be achieved.

[0138] As described above, the washing machine 1 of the present embodiment includes a housing 2, a water tank 3, a washing tank 4 (rotating drum), an air inlet 71, an air inlet duct 7, a heater 11, an exhaust port 81, and an exhaust duct 8. The housing 2 has a housing opening 23 communicating with the internal space 26. The water tank 3 is provided in the internal space 26. The washing tank 4 is provided in the water tank 3 so as to be rotatable around the rotation axis V0. The air inlet 71 is provided so as to communicate with the internal space 26 and to suck in drying air. The air inlet duct 7 supplies drying air from the air inlet 71 to the air inlet connection port 37 provided in the water tank 3. The heater 11 is arranged in the air inlet duct 7. The exhaust port 81 is formed in the housing 2 and discharges drying air. The exhaust duct 8 supplies drying air from the exhaust connection port 38 provided along the outer periphery of the water tank 3 to the exhaust port 81. The housing opening 23 opens in a direction (front side M1) different from the direction (rear side M2) in which the air inlet 71 opens.

[0139] According to such a structure, water passing through the casing opening 23 is unlikely to reach the heater 11. For the non-insulated heater 11, the risk of electric shock caused by water and bubbles B ejected through the casing opening 23 is reduced. Since the casing opening 23 and the air inlet 71 are separated, the lint flowing in from the casing opening 23 is unlikely to reach the heater 11. Therefore, for the washing machine 1, even if a filter is not provided between the air inlet 71 and the heater 11, the lint can be prevented from adhering to the heater 11. Furthermore, the washing machine 1 is not provided with a filter, thereby suppressing the pressure loss of the drying air in the drying air duct 6, and improving the drying performance. In this way, the washing machine 1 can realize the drying function with a simpler structure, and can further reduce costs.

[0140] In washing machine 1 of the present embodiment, air inlet 71 is formed above water tub 3 , and heater 11 is disposed above water tub 3 .

[0141] According to such a structure, water from the water tank 3 is less likely to splash onto the heater 11 .

[0142] In washing machine 1 of this embodiment, casing 2 has opening 20 (inlet) for loading clothes on front surface 2A, and casing opening 23 is formed on front surface 2A above opening 20. Air inlet 71 opens toward rear side M2, which is a direction away from front surface 2A.

[0143] According to such a structure, the drying air passes through the housing opening 23 toward the rear side M2 ​​and passes through the air inlet 71 toward the front side M1. That is, the drying air passes through the housing opening 23 and the air inlet 71 in opposite directions. Therefore, the drying air passing through the housing opening 23 is bent back and flows into the air inlet 71. Therefore, water passing through the housing opening 23 is less likely to reach the heater 11.

[0144] In the washing machine 1 of the present embodiment, the air intake passage 7 extends toward the front side M1 from the air intake port 71 toward the air intake connection port 37 .

[0145] According to such a configuration, by providing exhaust connection port 38 at rear side M2, air intake connection port 37 can be configured to be away from exhaust connection port 38. In washing machine 1, by making the path of drying air in washing tub 4 longer, drying efficiency can be improved.

[0146] Furthermore, in the washing machine 1 of the present embodiment, the heater 11 faces the air inlet 71 .

[0147] According to such a configuration, in the washing machine 1, the heater 11 can be kept away from the casing opening 23 in the air intake passage 7 extending toward the front side M1.

[0148] In addition, in the washing machine 1 of the present embodiment, the housing 2 has an opening 20 for putting clothes in the front surface 2A. The housing opening 23 is formed above the opening 20 on the front surface 2A. A door 21 that can be opened and closed is provided at the opening 20. The door 21 has a door sealing member 28 that is closely attached to the outer periphery of the opening 20. The door sealing member 28 forms a ventilation path 24 that faces the housing opening 23 and connects the outside of the housing 2 with the housing opening 23.

[0149] With this structure, in washing machine 1, drying air can flow into internal space 26. Also, since opening 20 is sealed by door sealing member 28, water in washing tub 4 is unlikely to flow out of opening 20 and flow into ventilation path 24 provided above door sealing member 28.

[0150] Furthermore, in washing machine 1 of the present embodiment, ventilation path 24 is curved.

[0151] According to such a configuration, in washing machine 1 , it is possible to ensure the inflow of drying air and to suppress water from passing through ventilation path 24 and entering internal space 26 .

[0152] In the washing machine 1 of this embodiment, the ventilation path 24 extends between the inlet 24A facing the outside of the casing 2 and the outlet 24B on the opposite side. The inlet 24A opens in the horizontal direction and the outlet 24B opens upward. The casing opening 23 opens in the horizontal direction.

[0153] According to such a configuration, in washing machine 1, a labyrinth structure can be formed by ventilation path 24 and casing opening 23. Therefore, in washing machine 1, it is possible to further suppress water from passing through ventilation path 24 and entering internal space 26.

[0154] In the washing machine 1 of the present embodiment, the heater 11 is of a non-insulated type.

[0155] According to such a configuration, in washing machine 1, an inexpensive heater can be adopted, and the cost can be further reduced.

[0156] Furthermore, washing machine 1 of the present embodiment does not include an air supply mechanism disposed in intake air passage 7 or exhaust air passage 8 .

[0157] According to such a configuration, in washing machine 1, air supply means such as a fan can be omitted, and the cost can be further reduced.

[0158] In washing machine 1 of the present embodiment, the flow of drying air is generated in intake air duct 7 or exhaust air duct 8 by the rotation of washing tub 4 .

[0159] With such a configuration, washing machine 1 can ensure a drying function even if air supply means such as a fan is omitted.

[0160] The washing machine 1 of this embodiment further includes a control unit C for executing 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 in a second rotation direction R2 opposite to the first rotation direction R1 in the dehydration process.

[0161] With such a configuration, washing machine 1 can ensure exhaust from exhaust duct 8 in the drying process and suppress outflow of bubbles B and water through exhaust duct 8 in the dehydration process.

[0162] In the washing machine 1 of the present embodiment, the controller C executes the first drying step and the second drying step in the drying process. Furthermore, the controller C executes the loosening step of rotating the washing tub 4 in the second rotation direction R2 between the first drying step and the second drying step.

[0163] With such a configuration, washing machine 1 can loosen and straighten the laundry in the middle of the drying process. In washing machine 1, the formation of wrinkles in the laundry can be suppressed.

[0164] In the washing machine 1 of the present embodiment, the exhaust connection port 38 is formed at a position above the horizontal plane including the rotation axis V0 when viewed from the front view direction in which the rotation axis V0 extends and at a position upstream of the apex of the water tank 3 when viewed from the first rotation direction R1. The exhaust air duct 8 extends upward.

[0165] According to such a configuration, the flow of drying air generated by the rotation of washing tub 4 in the drying process easily flows into exhaust air duct 8. In addition, foam B generated in the dehydration process is unlikely to flow into exhaust air duct 8.

[0166] Furthermore, in the washing machine 1 of the present embodiment, the rotation axis V0 extends substantially horizontally.

[0167] According to this structure, compared with a structure in which washing tub 4 is inclined, it is easier to ensure a space above washing tub 4 in internal space 26 of casing 2. Therefore, washing machine 1 can effectively utilize the space above washing tub 4 to achieve space saving.

[0168] In the washing machine 1 of the present embodiment, the check valve 75 (first valve) is provided in the air intake passage 7, and the valve 85 (second valve) of a different type from the check valve 75 is provided in the air exhaust passage 8. The valve 85 is a ball valve.

[0169] According to such a structure, the check valve 75 can restrict the foam B that flows backward with respect to the flow of air, and the valve 85 can restrict the foam B that flows in the same direction as the air.

[0170] In addition, in the washing machine 1 of the present embodiment, the exhaust connection port 38 has a side 38A (first side) and a side 38B (second side) along the rotation axis V0. When viewed from the second rotation direction R2 (rotation direction of the dehydration process), the side 38A is located downstream of the side 38B. The exhaust connection port 38 is formed with a rib 86 protruding from the side 38A toward the side 38B.

[0171] According to such a configuration, in washing machine 1 , it is possible to suppress bubbles B from reaching exhaust port 81 .

[0172] (Other embodiments)

[0173] In addition, the present disclosure is not limited to the above-mentioned embodiment, and can be implemented in other various forms.

[0174] In addition, in the embodiment, an example in which the rotation direction of the dehydration process and the rotation direction of the drying process are opposite is described, but the rotation direction of the dehydration process and the rotation direction of the drying process are not limited to this. For example, the rotation direction of the dehydration process and the rotation direction of the drying process may also be the first rotation direction R1. In this case, the rib 86 protrudes from the edge 38A (first edge) on the downstream side toward the edge 38B (second edge) on the upstream side when viewed from the first rotation direction R1. In addition, the rotation direction of the dehydration process and the rotation direction of the drying process may also be the second rotation direction R2. In this case, the rib 86 protrudes from the edge 38B on the downstream side toward the edge 38A on the upstream side when viewed from the second rotation direction R2.

[0175] In addition, in the embodiment, as an example of the rotating drum of the present disclosure, the washing tub 4 that can be rotatably arranged around the rotation axis V0 extending substantially horizontally is described, but the rotating drum of the present disclosure is not limited thereto. For example, a washing tub that can be rotatably arranged around the rotation axis extending in a direction having an inclination greater than 5° relative to the horizontal is also included in an example of the rotating drum of the present disclosure.

[0176] In addition, in the embodiment, an example in which the step of loosening and arranging clothes is included in the drying process is described, but the structure of the drying process is not limited to this. For example, the drying process may not include the step of loosening and arranging clothes, but may be composed of one or more drying steps of rotating the washing tank 4 (rotating drum) in the first rotation direction R1. In addition, in the case where the drying process is composed of one or more drying steps, the step of loosening and arranging clothes as a process different from the drying process may be performed after one drying step or between multiple drying steps.

[0177] The washing machine of the first embodiment comprises: a casing having a casing opening communicating with an internal space; a water tank disposed in the internal space; and a rotating drum disposed in the water tank so as to be rotatable about a rotation axis. In addition, the washing machine comprises: an air inlet disposed in communication with the internal space and sucking in drying air; an air inlet duct supplying drying air from the air inlet to an air inlet connection port disposed in the water tank; and a heater disposed in the air inlet duct. In addition, the washing machine comprises: an exhaust port formed in the casing and discharging drying air; and an exhaust duct supplying drying air from an exhaust connection port disposed along the outer circumference of the water tank to the exhaust port. Furthermore, the direction in which the casing opening is opened is different from the direction in which the air inlet is opened.

[0178] A washing machine according to a second aspect is the washing machine according to the first aspect, wherein the air inlet is formed above the water tub, and the heater is disposed above the water tub.

[0179] As a third type of washing machine, based on the first or second type of washing machine, the casing has an inlet for throwing clothes on the front surface, the casing opening is formed on the front surface above the inlet, and the air inlet opens to the rear side which is away from the front surface.

[0180] A washing machine according to a fourth aspect is the washing machine according to the third aspect, wherein the air intake passage extends forward from the air intake port toward the air intake connection port.

[0181] A washing machine according to a fifth aspect is the washing machine according to the fourth aspect, wherein the heater faces the air inlet.

[0182] As a sixth embodiment, the washing machine is a washing machine of any one of the first to fifth embodiments, wherein the housing has an inlet for clothing input on the front surface, the housing opening is formed on the front surface above the inlet, and an openable and closable door is provided at the inlet. The door has a door sealing member that is closely attached to the outer periphery of the inlet, and the door sealing member forms a ventilation path that faces the housing opening and connects the outside of the housing with the housing opening.

[0183] The washing machine according to the seventh aspect is the washing machine according to the sixth aspect, wherein the ventilation path is curved.

[0184] As an eighth embodiment of the washing machine, based on the seventh embodiment of the washing machine, the ventilation path extends between an inlet facing the outside of the casing and an outlet on the opposite side, the inlet opens in a lateral direction, the outlet opens in an upward direction, and the casing opening opens in a lateral direction.

[0185] A washing machine according to a ninth aspect is the washing machine according to any one of the first to eighth aspects, wherein the heater is a non-insulated type.

[0186] A washing machine according to a tenth aspect is the washing machine according to any one of the first to ninth aspects, but does not include an air supply mechanism disposed in the air intake passage or the air exhaust passage.

[0187] The washing machine according to an eleventh aspect is the washing machine according to any one of the first to tenth aspects, wherein a flow of drying air is generated in the air intake duct or the air exhaust duct by rotation of the rotary drum.

[0188] The washing machine of the twelfth embodiment is a washing machine of any one of the first to eleventh embodiments, and further comprises a control unit for executing a dehydration 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.

[0189] As a washing machine of the 13th mode, based on the washing machine of the 12th mode, the control unit executes the first drying step and the second drying step in the drying process, and also executes a loosening and untangling step of rotating the rotating drum in the second rotation direction between the first drying step and the second drying step.

[0190] As a washing machine of the 14th type, based on the washing machine of the 12th type, the exhaust connection port is formed at a position higher than the horizontal plane including the rotation axis and at a position upstream of the apex of the water tank when viewed from the first rotation direction, when viewed from the main viewing angle observed from the extension direction of the rotation axis, and the exhaust air path extends upward.

[0191] A washing machine according to a fifteenth aspect is the washing machine according to any one of the first to fourteenth aspects, wherein the rotation axis extends substantially horizontally.

[0192] As a 16th mode washing machine, on the basis of any one of the 1st to 15th modes, a first valve is provided on the air intake duct, and a second valve of a type different from that of the first valve is provided on the exhaust duct, the first valve is a check valve, and the second valve is a ball valve.

[0193] As a washing machine of the 17th embodiment, based on the washing machine of any one of the 1st to 16th embodiments, the exhaust connection port has a first side and a second side along the rotation axis. The first side is arranged 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 on the exhaust connection port.

[0194] The present disclosure is fully described in association with the preferred embodiments while referring to the accompanying drawings, but various deformations and modifications are obvious to those skilled in the art. As long as they do not depart from the scope of the present disclosure based on the attached claims, it should be understood that such deformations and modifications are included in the scope of the present disclosure.

[0195] Industrial Applicability

[0196] The washing machine of the present disclosure is useful, for example, as a household washing machine, a commercial washing machine, or any kind of washing and drying machine (eg, a household drum-type washing machine or a vertical washing machine).

[0197] Description of Reference Numerals

[0198] 1. Washing machine; 2. Casing; 2A. Front surface; 3. Sink; 4. Washing tank; 5. Detergent supply unit; 6. Drying air duct; 7. Intake air duct; 8. Exhaust air duct; 11. Heater; 20. Opening; 21. Door; 23. Casing opening; 24. Ventilation path; 24A. Inlet; 24B. Outlet; 24C. Claw; 24D. Opening; 25. External space; 26. Internal space; 27. Door body; 27A. Opening; 28. Door sealing member; 31. Opening; 32. Storage part; 33. Narrow part; 34. Cylinder; 36. Bottom; 37. Intake connection port; 38. Exhaust connection port; 38A. Side; 38B. Side; 41. Opening; 71. Air inlet; 75. Check valve; 79. Air inlet outlet; 81. Exhaust port; 82. 1st bend; 83. 2nd bend; 84. Bellows; 85. Valve; 85A. Narrow portion; 86. Rib; 88. Connecting portion; 89. Exhaust inlet; A. Arrow (flow of air); A1. Arrow (flow of air); A2. Arrow (flow of air); A3. Arrow (flow of air); B. Foam; C. Control portion; C1. Arrow; C2. Arrow; K. Width direction; M. Front-to-back direction; M1. Front side; M2. Rear side; R1. 1st rotation direction; R2. 2nd rotation direction; T. Time; T1. Drying time; V0. Rotation axis.

Claims

1. A washing machine, characterized in that: The washing machine comprises: a casing having a casing opening communicating with the internal space; A water tank disposed in the internal space; A rotating drum, which is rotatably disposed on the water tank around a rotation axis; an air inlet, which is arranged in communication with the internal space and sucks in drying air; an air intake passage for supplying the drying air from the air intake port to an air intake connection port provided in the water tank; A heater, which is arranged in the air intake passage; an exhaust port formed in the housing to exhaust the drying air; and an exhaust air passage for supplying the drying air from an exhaust connection port provided along the outer periphery of the water tank to the exhaust port, The direction in which the casing opening opens is different from the direction in which the air inlet opens.

2. The washing machine according to claim 1, characterized in that: The air inlet is formed above the water tank, The heater is arranged above the water tank.

3. The washing machine according to claim 1, characterized in that: The housing has a clothing input port on the front surface. The housing opening is formed on the front surface above the input port, The air inlet opens toward the rear side which is a direction away from the front surface.

4. The washing machine according to claim 3, characterized in that: The air intake passage extends forward from the air intake port toward the air intake connection port.

5. The washing machine according to claim 4, characterized in that: The heater faces the air inlet.

6. The washing machine according to claim 1, characterized in that: The housing has a clothing input port on the front surface. The housing opening is formed on the front surface above the input port, The inlet is provided with a door that can be opened and closed. The door has a door sealing member that is in close contact with the outer periphery of the input port. The door sealing member forms a ventilation path facing the cabinet opening and communicating the outside of the cabinet with the cabinet opening.

7. The washing machine according to claim 6, characterized in that: The ventilation path is curved.

8. The washing machine according to claim 7, characterized in that: The ventilation path extends between an inlet facing the outside of the housing and an outlet on the opposite side, The inlet opens in a lateral direction, and the outlet opens in an upward direction. The housing opening opens in the lateral direction.

9. The washing machine according to claim 1, characterized in that: The heater is of non-insulated type.

10. The washing machine according to claim 1, characterized in that: The washing machine does not include an air supply mechanism disposed in the air intake passage or the air exhaust passage.

11. The washing machine according to claim 1, characterized in that: The flow of the drying air is generated in the intake air passage or the exhaust air passage by the rotation of the rotary drum.

12. The washing machine according to claim 1, characterized in that: The washing machine further comprises a control unit for executing 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 that is opposite to the first rotation direction in the dehydration step.

13. The washing machine according to claim 12, characterized in that: The control unit performs a first drying step and a second drying step in the drying process, Furthermore, the control unit executes a loosening and arranging step of rotating the rotary drum in the second rotation direction between the first drying step and the second drying step.

14. The washing machine according to claim 12, characterized in that: The exhaust connection port is formed at a position above a horizontal plane including the rotation axis in a front view from the extending direction of the rotation axis and at a position upstream of the apex of the water tank when viewed from the first rotation direction. The exhaust air passage extends upward.

15. The washing machine according to claim 1, characterized in that: The rotation axis extends substantially horizontally.

16. The washing machine according to any one of claims 1 to 15, characterized in that: A first valve is provided in the air intake passage. The exhaust air passage is provided with a second valve of a type different from that of the first valve. The first valve is a check valve, and the second valve is a ball valve.

17. The washing machine according to claim 1, characterized in that: The exhaust connection port has a first side and a second side along the rotation axis, The first side is disposed downstream of the second side when viewed from the rotation direction of the dehydration process, The exhaust connection port has a rib formed therein so as to protrude from the first side toward the second side.

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