washing machine

Abstract

To provide a washing machine which achieves a drying function with a simple structure, and which has reduced cost.SOLUTION: A washing machine includes: a housing having a housing opening communicating with an internal space; a water tub provided in the internal space; a rotary drum provided in the water tub so as to rotate around a rotary shaft; an intake port which is provided communicating with the internal space, and where drying air is taken in; an intake air passage for supplying drying air to an intake connection port provided in the water tub from the intake port; a heater arranged in the intake air passage; an exhaust port formed in the housing, and from which drying air is exhausted; and an exhaust air passage for supplying drying air from an exhaust connection port provided along an outer periphery of the water tub to the exhaust port. The direction in which the housing opening opens is different from the direction in which the intake port opens.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to washing machines. [Background technology]

[0002] For example, Patent Document 1 discloses a washer / dryer having a washing tub for accommodating laundry, a heat pump device, and a blower fan.

[0003] The washing machine described in Patent Document 1 achieves a drying function using a heat pump unit and a blower fan. The washing tub and the heat pump unit are connected by a circulation air duct. The air heated by the heat pump unit is circulated between the water tub and the heat pump unit by the blower fan to dry the laundry. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-136075 Summary of the Invention [Problem to be solved by the invention]

[0005] However, providing a heat pump device and a blower fan to realize the drying function complicates the structure of the washing machine, increasing the cost of the washing machine.

[0006] Therefore, an object of the present disclosure is to solve the above-mentioned problems, to realize a drying function with a simple structure, and to reduce the cost of the washing machine. [Means for solving the problem]

[0007] A washing machine according to one aspect of the present disclosure comprises a housing having a housing opening communicating with an internal space, a water tub provided in the internal space, a rotating drum rotatably provided in the water tub around a rotation axis, an air intake port provided in communication with the internal space and through which drying air is taken in, an air intake duct that supplies drying air from the air intake port to an air intake connection port provided in the water tub, a heater arranged in the air intake duct, an exhaust port formed in the housing through which the drying air is exhausted, and an exhaust duct that supplies drying air from an exhaust connection port provided along the outer periphery of the water tub to the exhaust port, wherein the direction in which the housing opening opens is different from the direction in which the air intake port opens. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide a washing machine that has a drying function with a simple structure and reduces costs. [Brief explanation of the drawings]

[0009] [Figure 1A] FIG. 1 is a perspective view of a washing machine according to a first embodiment of the present disclosure; [Figure 1B] FIG. 1 is a perspective view of a washing machine according to a first embodiment of the present disclosure; [Figure 1C] Washing machine top view [Figure 1D] Cross section of a washing machine [Figure 2] Partial perspective view of a washing machine [Figure 3] Cross-sectional view of part of a washing machine viewed from the width direction [Figure 4] Front view of a section of a washing machine [Figure 5] Perspective view of the intake air duct [Figure 6] Cross section of intake air duct [Figure 7] Perspective view of the exhaust air duct [Figure 8] Cross section of exhaust air duct [Figure 9A] Diagram showing the connection between the exhaust air duct and the water tank [Figure 9B] Diagram showing the connection between the exhaust air duct and the water tank [Figure 10A] Exploded view of the front structure of the washing machine [Figure 10B]Exploded view of the front structure of the washing machine [Figure 11A] Enlarged view of door gasket material [Figure 11B] Enlarged view of door gasket material [Figure 12A] Enlarged view of the housing [Figure 12B] Enlarged view of the housing [Figure 13A] Enlarged cross-sectional view of the door and housing [Figure 13B] Enlarged cross-sectional view of the ventilation duct [Figure 14] Sequence diagram of the washing machine drying process DETAILED DESCRIPTION OF THE INVENTION

[0010] (Embodiment) A washing machine 1 according to an embodiment of the present disclosure will be described.

[0011] [Overall configuration] 1A and 1B are perspective views of a washing machine 1 according to a first embodiment of the present disclosure. FIG. 1A is a perspective view of the washing machine 1 in a closed state, and FIG. 1B is a perspective view of the washing machine 1 in an open state. FIG. 1C is a top view of the washing machine 1. FIG. 1D is a cross-sectional view of the washing machine 1. FIG. 2 is a perspective view of a portion of the washing machine 1.

[0012] As shown in FIGS. 1A to 1D, the washing machine 1 includes a housing 2, a water tub 3 (FIG. 1D), a washing tub 4 (FIG. 1D), a detergent supply unit 5, a drying air duct 6, a heater 11 (FIG. 1C), and a control unit C.

[0013] <Case> As shown in Figures 1A and 1B, the housing 2 is a member that forms the exterior of the washing machine 1. As shown in Figures 1C and 1D, the housing 2 defines an internal space 26. The internal space 26 accommodates a water tub 3, a washing tub 4, a detergent supply unit 5, and a drying air duct 6.

[0014] 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 covers the opening 20 and can be opened and closed freely.

[0015] <Aquarium> As shown in FIG. 1D, water tub 3 is provided inside housing 2 and is a generally cylindrical member with one end closed to store wash water. Water tub 3 has a tubular portion 34 and a bottom portion 36 that closes one end of tubular portion 34. Water tub 3 has an opening 31 facing bottom portion 36 at a position facing opening 20. Water tub 3 may also be referred to as an outer tub.

[0016] <Washing tub> Washing tub 4 is a generally cylindrical member that is rotatable around rotation axis V0 inside water tub 3 and that accommodates laundry such as clothes. Washing tub 4 is driven to rotate by, for example, a motor. Washing tub 4 has opening 41, facing opening 20, for inserting laundry. Washing tub 4 may also be referred to as a rotating drum or an inner tub.

[0017] Furthermore, 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 the movement of air, water, and detergent between the water tub 3 and the washing tub 4.

[0018] The rotation axis V0 extends substantially horizontally. In this specification, "extending substantially horizontally" means extending in a direction inclined at an angle of 5° or less from the horizontal. 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 ​​away from the opening 41.

[0019] <Laundry agent supply unit> 1C and 1D, the laundry agent supply unit 5 is a unit that supplies laundry treatment agents such as liquid agents, powder detergents, and solid agents to the washing tub 4. The liquid agents are liquid agents used to wash laundry such as clothes. The liquid agents may include detergent, fabric softener, and neutral detergent.

[0020] <Drying air path> As shown in Figures 1C and 2, dry air duct 6 is provided in internal space 26 of housing 2 and is a duct for flowing dry air into water tub 3 and washing tub 4. Dry air duct 6 forms a flow path therein through which dry air passes. Through dry air duct 6, dry air is introduced from internal space 26 of housing 2 into water tub 3 and washing tub 4, and is discharged from water tub 3 and washing tub 4 to the outside of housing 2 (arrow A in Figure 2).

[0021] Drying air duct 6 is divided into intake air duct 7 and exhaust air duct 8. Intake air duct 7 and exhaust air duct 8 are connected to each other via water tub 3 and washing tub 4, and drying air passes through intake air duct 7, water tub 3, washing tub 4, and exhaust air duct 8, in that order. Intake air duct 7 connects internal space 26 of housing 2 with water tub 3, and supplies drying air to water tub 3. Exhaust air duct 8 connects water tub 3 with the outside of housing 2, and exhausts drying air from water tub 3.

[0022] <Heater> The heater 11 (FIG. 1C) is provided inside the intake air duct 7 and is a heating means for heating the drying air flowing into the intake air duct 7. In this embodiment, the heater 11 is a non-insulated heater. The heater 11 has a simple structure without an insulating cover that covers the heat generating portion or the connection portion that electrically connects the heat generating portion to a power source. The heater 11 is, for example, a nichrome wire heater.

[0023] <Control unit> 1A and 1B, the control unit C is a component that controls the operation of the washing machine 1. The control unit C may include, for example, a memory (not shown) that stores a program and a processing circuit (not shown) that corresponds to a processor such as a CPU, and function as these elements by the processor executing the program.

[0024] Here, the structure of the housing 2 will be described 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 connects an external space 25 and an internal space 26 of the housing 2. The housing opening 23 opens toward the front side M1.

[0025] 1A, 1B, and 1D, door 21 forms ventilation passage 24 at a position facing housing opening 23. Ventilation passage 24 penetrates door 21 and allows air to pass through door 21. When door 21 is closed, ventilation passage 24 communicates with housing opening 23, and air from external space 25 flows into housing 2 after passing through ventilation passage 24 and housing opening 23 in that order.

[0026] On the other hand, when the door 21 is open, the ventilation passage 24 and the housing opening 23 are separated from each other.

[0027] The flow of air that has flowed into the housing 2 will be described with reference to Figures 2 and 3. Figure 3 is a cross-sectional view of a part of the washing machine 1 as seen from the width direction K.

[0028] 2, the drying air that flows into the housing 2 passes through the internal space 26, the intake air duct 7, the water tub 3, the washing tub 4, and the exhaust air duct 8, in that order, before being exhausted to the external space 25 of the housing 2. The drying air passes through the housing 2 in a single pass, which is different from the case where the air circulates through the housing 2.

[0029] More specifically, drying air flows from external space 25 of housing 2 through housing opening 23 into internal space 26 above water tub 3. The air that flows into internal space 26 flows toward rear side M2, then turns around and flows into intake air duct 7. In this specification, "bent" means that the direction of travel before the turn and the direction of travel after the turn intersect at an angle of at least 45°. In this embodiment, the air that flows into internal space 26 turns 180° before flowing into intake air duct 7.

[0030] As shown in Fig. 3, the drying air in intake air duct 7 is heated by heater 11, and the heated drying air flows from intake air duct 7 into water tub 3 and washing tub 4. In washing tub 4, the drying air comes into contact with wet laundry to dry the laundry.

[0031] The drying air in washing tub 4 removes moisture from the laundry, and then is discharged to external space 25 of housing 2 through exhaust air duct 8.

[0032] Here, the structure of the water tank 3 through which the drying air passes will be described in more detail.

[0033] As shown in Figure 3, tubular portion 34 of water tub 3 has accommodation portion 32 that accommodates washing tub 4, and narrowed portion 33 located on front side M1 of accommodation portion 32. Narrowed portion 33 forms opening 31 and has a shape that tapers toward opening 31. Therefore, narrowed portion 33 has a smaller radius than accommodation portion 32.

[0034] An exhaust connection port 38 is formed along the outer periphery of the housing section 32. The exhaust connection port 38 is an opening for connecting the exhaust air duct 8 to the water tub 3. Drying air flows from the water tub 3 into the exhaust air duct 8 through the exhaust connection port 38.

[0035] An intake connection port 37 is formed along the outer periphery of narrowed portion 33. Intake connection port 37 is an opening that connects intake airflow duct 7 to water tub 3. Drying air flows from intake airflow duct 7 into water tub 3 through intake connection port 37. Intake connection port 37 is formed on the front side M1 of exhaust connection port 38.

[0036] With this structure, the intake connection port 37 and the exhaust connection port 38 are spaced apart in the front-to-rear direction M. This allows the path of the drying air passing through the water tub 3 (i.e., the washing tub 4) to be longer, making it easier for the drying air to hit more laundry.

[0037] In addition, the intake connection port 37 is formed closer to the rotation axis V0 than the exhaust connection port 38.

[0038] Here, the principle of how air flows in the drying process will be described with reference to Fig. 4. Fig. 4 is a cross-sectional view of a part of washing machine 1 as seen from the front side M1.

[0039] As shown in FIG. 4, the washing tub 4 rotates around the rotation axis V0 in a first rotation direction R1 during the drying process.

[0040] When the rotation speed of washing tub 4 is equal to or higher than a predetermined value, for example, 550 rpm or higher, a swirling flow along the first rotation direction R1 is generated inside washing tub 4. The swirling flow may be a forced vortex. The forced vortex forms an air velocity distribution inside washing tub 4. Specifically, the air velocity increases as the distance from rotation axis V0 increases.

[0041] In washing machine 1, exhaust connection port 38 is formed at a position farther from rotation axis V0 than intake connection port 37, so the air near exhaust connection port 38 has a higher velocity than the air near intake connection port 37. Therefore, air is more likely to flow out through exhaust connection port 38.

[0042] When the air flows out through the exhaust connection port 38, a negative pressure is created inside the washing tub 4. The negative pressure causes air to be sucked into the washing tub 4 through the intake connection port 37.

[0043] According to this principle, even in washing machine 1 that does not have a fan, a forced vortex is generated by the rotation of washing tub 4, which creates a pressure difference in drying air duct 6 and generates an air flow.

[0044] When viewed from the front of water tub 3, exhaust air duct 8 extends upward from the upper right portion of the outer periphery of water tub 3. The lower end of exhaust air duct 8 is connected to exhaust connection port 38. Therefore, exhaust connection port 38 is also formed in the upper right portion of the outer periphery of water tub 3. In other words, exhaust connection port 38 is formed in an upper right fan shape upstream of the apex of water tub 3 when viewed from first rotation direction R1 in the drying process.

[0045] The air flow (arrow C1) near exhaust connection port 38 has a velocity component in the same direction (upward) as the direction in which exhaust air duct 8 extends. On the other hand, the air flow (arrow C2) in the sector shape at the upper left of water tub 3 has a velocity component in the opposite direction to the direction in which exhaust air duct 8 extends. By forming exhaust connection port 38 on the right side, the centrifugal force of washing tub 4 can be utilized to promote the outflow of air compared to when exhaust connection port 38 is formed on the left side.

[0046] Next, the structure of the intake airflow duct 7 will be described with reference to Figures 3, 5 and 6. Figure 5 is a perspective view of the intake airflow duct 7. Figure 6 is a cross-sectional view of the intake airflow duct 7.

[0047] As shown in FIG. 3, intake airflow duct 7 extends obliquely downward along the outer periphery of water tub 3.

[0048] As shown in Fig. 5, intake airflow duct 7 extends from intake port 71 to intake outlet port 79. Intake port 71 is formed in internal space 26 above water tub 3, and is an opening for allowing drying air to flow into intake airflow duct 7. Intake outlet port 79 is an opening that communicates with intake connection port 37.

[0049] The air intake port 71 opens toward the rear side M2, and the air intake duct 7 extends from the air intake port 71 toward the front side M1. Therefore, in the air intake duct 7, the drying air flows toward the front side M1. As shown in FIG. 3, the direction in which the air passes through the air intake port 71 (forward M1) is opposite to the direction in which the drying air passes through the housing opening 23 (rearward M2). Furthermore, the air intake port 71 and the housing opening 23 are spaced apart from each other. Therefore, in order for the drying air to flow into the air intake port 71, the drying air needs to turn approximately 180° in the internal space 26 between the housing opening 23 and the air intake port 71.

[0050] To summarize the positional relationship of the openings with respect to intake, the housing opening 23 is formed on the front side M1 of the intake port 71, and the intake port 71 is formed on the rear side M2 ​​of the intake outlet 79 and the intake connection port 37.

[0051] 3 and 6, the heater 11 is housed in the flow path formed by the intake airflow path 7. Because the intake port 71 opens toward the rear side M2, it is possible to prevent liquids such as water or foam sprayed through the door 21 from hitting the heater 11. Furthermore, lint and dust passing through the housing opening 23 are also less likely to reach the heater 11. Therefore, even if a filter is not provided between the intake port 71 and the heater 11, it is possible to prevent lint from adhering to the heater 11.

[0052] The heater 11 is housed in the intake air duct 7 facing the intake port 71. This arrangement allows the heater 11 to be separated from the intake connection port 37, making it less likely that bubbles and water flowing back from the water tub 3 will splash onto the heater 11. Furthermore, because the intake port 71 is formed above the water tub 3, water will less likely splash onto the heater 11 even in an abnormal state where water leaks from the water tub 3.

[0053] As shown in Figure 6, a check valve 75 is provided downstream of heater 11 in the flow path formed by intake air duct 7. Check valve 75 is structured to restrict the flow of air through intake air duct 7 to one direction. Check valve 75 is opened by the flow of air from intake port 71 toward intake outlet 79, and is closed by the flow of air from intake outlet 79 toward intake port 71. With this structure, check valve 75 can prevent water and bubbles from flowing back from aquarium 3 through intake air duct 7.

[0054] Next, the structure of exhaust air duct 8 will be described with reference to Fig. 3 and Fig. 7 to Fig. 9B. Fig. 7 is a perspective view of exhaust air duct 8. Fig. 8 is a cross-sectional view of exhaust air duct 8. Figs. 9A and 9B are diagrams showing the connection between exhaust air duct 8 and water tub 3.

[0055] As shown in FIG. 3, exhaust air duct 8 extends upward from water tub 3.

[0056] As shown in FIG. 7, exhaust air duct 8 has a curved shape. More specifically, exhaust air duct 8 has, in order of distance from water tub 3 (FIG. 3), a connecting portion 88, a first bent portion 82, a bellows portion 84, and a second bent portion 83. The connecting portion 88 is a member connected to water tub 3 and extends upward. The first bent portion 82 bends exhaust air duct 8 from the upward direction to the horizontal direction, and the second bent portion 83 bends exhaust air duct 8 from the horizontal direction to the upward direction. The bellows portion 84 is a member connecting first bent portion 82 and second bent portion 83 in the horizontal direction and has a bellows structure that damps vibrations. The bent portions 82 and 83 allow exhaust air duct 8 to extend upward and position the air outlet (exhaust port 81, described below) on the rear side M2. The bellows portion 84 prevents vibrations from the water tub 3 from being transmitted to the housing 2.

[0057] The exhaust air duct 8 extends from the exhaust inlet 89 to the exhaust outlet 81. The exhaust inlet 89 is an opening that communicates with the exhaust connection port 38. The exhaust outlet 81 is provided in a state that protrudes from the housing 2 to the rear side M2 ​​(FIG. 1C), and is an opening for discharging drying air from the exhaust air duct 8.

[0058] Exhaust port 81 opens upward. Therefore, drying air is discharged upward from housing 2. The discharged air is humidified because it has been heated by heater 11 and has removed moisture from the clothes. Discharging such air upward can prevent the air from hitting the walls or other equipment around washing machine 1.

[0059] The exhaust port 81 has a shape that is long in the width direction K (FIG. 1C). With this structure, it is possible to reduce the dimension of the washing machine 1 in the front-rear direction M, while ensuring a larger exhaust volume.

[0060] 8, a valve 85 is housed in the flow path formed by the exhaust air passage 8. The valve 85 has a structure that allows air to pass toward the exhaust port 81 while restricting the passage of bubbles.

[0061] The valve 85 is, for example, a ball valve that can move up and down. In this case, the exhaust air duct 8 forms a narrowed section 85A in which the cross section of the flow path is narrowed upstream of the valve 85. The valve 85 can move up and down between an open position away from the narrowed section 85A and a closed position in which the narrowed section 85A is blocked. The valve 85 is normally located in the open position due to gravity. When air flows through the exhaust air duct 8, the force of the air is smaller than the buoyancy required to lift the valve 85, so the valve 85 remains in the open position. On the other hand, when bubbles enter the exhaust air duct 8, the bubbles lift the valve 85, causing the valve 85 to rise to the closed position. This prevents the bubbles from reaching the exhaust port 81.

[0062] In the exhaust air duct 8, the flow of the fluid to be prevented, such as bubbles or water, and the flow of the drying air are in the same direction. In the intake air duct 7, the flow of the fluid to be prevented, such as bubbles or water, and the flow of the drying air are in opposite directions. Therefore, the valve 85 is a different type of valve from the check valve 75. In this embodiment, the valve 85 is a ball valve, and the check valve 75 is a swing-type check valve.

[0063] As shown in FIG. 9A, washing tub 4 rotates in a first rotation direction R1 in the drying process.

[0064] 9A and 9B, a rib 86 is formed on 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 block part of the exhaust inlet 89. The rib 86 protrudes in a second rotation direction R2 that is opposite to the first rotation direction R1. An end of the rib 86 is located below and near the center of the valve 85.

[0065] As shown in FIG. 9A, the rib 86 can limit where on the valve 85 the bubble B that has risen through the exhaust inlet 89 strikes.

[0066] When washing tub 4 rotates, foam B moves along first rotation direction R1. If rib 86 were not formed, some of foam B moving along first rotation direction R1 would hit side 38A and rise along the side surface of exhaust air duct 8 extending from side 38A. In this case, foam B hits the end of valve 85, and is unable to sufficiently lift valve 85, so that it may pass between the side surface of exhaust air duct 8 and valve 85 and reach exhaust port 81.

[0067] On the other hand, when ribs 86 are formed on exhaust connection port 38, bubbles B hit ribs 86, rise from below near the center of valve 85, and hit the center of valve 85. In this case, compared to when bubbles B hit near the outer periphery of valve 85, valve 85 is more likely to be lifted, and exhaust air duct 8 is more likely to be sealed. Therefore, bubbles B can be prevented from reaching exhaust port 81.

[0068] By configuring exhaust airflow passage 8 in this manner, it is possible to employ a structure that allows air to easily flow into exhaust airflow passage 8 by rotation in first rotation direction R1, while also suppressing the entry of fluids other than air.

[0069] Next, the structure of ventilation passage 24 of door 21 and housing opening 23 will be described with reference to Figs. 10A to 13B. Figs. 10A and 10B are exploded views of the front structure of washing machine 1. Figs. 11A and 11B are enlarged views of door 21. Figs. 12A and 12B are enlarged views of housing 2. Fig. 13A is an enlarged cross-sectional view of door 21 and housing 2. Fig. 13B is an enlarged cross-sectional view of ventilation passage 24.

[0070] As shown in FIGS. 10A and 10B, door 21 has door body 27 and door packing member 28. Door body 27 is a disc-shaped member that is larger than opening 20 in housing 2 and completely covers opening 20. Door packing member 28 is a member that tightly fits door body 27 to front surface 2A, which corresponds to the outer periphery of opening 20. Door packing member 28 is made of resin. Therefore, the aesthetic appearance of washing machine 1 can be improved while ensuring the sealing performance of door 21.

[0071] An opening 27A is formed in the upper part of the door main body 27, and an air passage 24 is formed in the upper part of the door packing member 28. The opening 27A is an opening for allowing the air passage 24 to protrude. The air passage 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 housing 2.

[0072] 11A, an inlet 24A of the ventilation passage 24 is formed on the surface (FIG. 10A) of the front side M1 of the door packing member 28. The inlet 24A protrudes to the front side M1 and opens in the front-rear direction M.

[0073] As shown in Fig. 11B, an outlet 24B of ventilation passage 24 is formed on the surface (Fig. 10B) of rear side M2 ​​of door packing member 28. Outlet 24B opens upward. Therefore, the fluid flowing into ventilation passage 24 bends before flowing out of ventilation passage 24.

[0074] Around the outlet 24B, a claw portion 24C is formed, which protrudes toward the rear side M2 ​​from the surface of the door packing member 28. The claw portion 24C is a member that engages with the housing 2.

[0075] 10A and 10B, a housing opening 23 is formed in the front surface 2A of the housing 2 at a position facing the ventilation passage 24. The housing opening 23 opens in the lateral direction.

[0076] 12A and 12B, a plurality of openings 24D are formed around the housing opening 23. Openings 24D are openings for engaging with claw portions 24C together with housing opening 23. By engaging claw portions 24C with openings 24D and housing opening 23, the positioning of door 21 relative to housing 2 can be more reliably performed, and housing opening 23 and ventilation passage 24 can be communicated with each other.

[0077] As shown in Fig. 13A, when door 21 is engaged with housing 2, ventilation passage 24 and housing opening 23 communicate with each other. Due to the negative pressure in internal space 26, air in external space 25 of housing 2 passes through ventilation passage 24 and housing opening 23 and flows into internal space 26. As shown in Fig. 13B, the air flows to rear side M2, passes through inlet 24A (arrow A1), bends, flows upward, passes through outlet 24B (arrow A2), and then bends again to flow to rear side M2 ​​and passes through housing opening 23 (arrow A3). In other words, ventilation passage 24 and housing opening 23 form a labyrinth structure.

[0078] The labyrinth structure allows air to pass through while preventing water from passing through door 21. Specifically, even if water passes through inlet 24A, it does not bend in ventilation passage 24, making it difficult for the water to reach housing opening 23.

[0079] Furthermore, outlet 24B and housing opening 23 are formed at a higher position than inlet 24A. With this structure, even if a heavy fluid such as water passes through inlet 24A, it is difficult for it to reach upper outlet 24B and housing opening 23. This prevents water from getting onto heater 11 through housing opening 23. Therefore, a non-insulated heater with a simple structure can be used as heater 11.

[0080] (operation) In the above-described configuration, an example of the operation of the washing machine 1 will be described with reference to Fig. 14. Fig. 14 is a sequence diagram of the drying process of the washing machine 1.

[0081] The operation of the washing machine 1 includes a washing process, a rinsing process, a spin-drying process, and a drying process. The control unit C controls each process sequentially.

[0082] In the washing process, laundry is placed in the washing tub 4, and water and detergent are supplied to the washing tub 4 to wash the laundry. In the rinsing process, water is supplied to the washing tub 4 to rinse the laundry. In the spin-drying process, water is discharged from the water tub 3, and the washing tub 4 is rotated at high speed to spin-dry the laundry.

[0083] The rotation direction of washing tub 4 during the spin-drying process is constant and is a second rotation direction R2 opposite to the first rotation direction R1 shown in Fig. 9A. That is, the rotation direction of washing tub 4 during the spin-drying process is a direction that makes it difficult for fluid to flow into exhaust air duct 8. The rotation speed may be 400 rpm or more and 1000 rpm or less, and is preferably 550 rpm.

[0084] In the drying process, the dewatered laundry is dried by applying drying air to it while rotating the washing tub 4. The drying process includes one or more drying steps and a loosening step.

[0085] <Drying step> 14, the control unit C acquires the drying time T1 according to the course selected by the user (S10). The drying time T1 is, for example, 30 minutes, 1 hour, or 2 hours.

[0086] The control unit C starts the rotation of the washing tub 4 (S11). The rotation direction is the first rotation direction R1.

[0087] Next, the control unit C acquires the rotation speed of the washing tub 4 (S12).

[0088] Next, the control unit C determines whether the rotation speed of the washing tub 4 is equal to or greater than a predetermined value, for example, 550 rpm (S13). When the rotation speed exceeds 550 rpm, a flow of drying air is generated in the washing tub 4, and the laundry can be dried.

[0089] If the rotation speed is 550 rpm or more (Yes in S13), the control unit C turns on the heater 11 to maintain the rotation speed constant (S14). This makes it possible to heat the drying air flowing into the intake air duct 7, and suppresses further increase in the rotation speed of the washing tub 4.

[0090] If the rotation speed is less than 550 rpm (No in S13), the control unit C returns to step S12.

[0091] Next, the control unit C starts a waiting time T2 of 30 minutes with the washing tub 4 rotating and the heater turned on (S15).

[0092] When the waiting time T2 has elapsed, the control unit C turns off the heater 11 (S16).

[0093] Next, the control unit C stops the rotation of the washing tub 4 (S17).

[0094] <Loosening step> Next, the control unit C executes a laundry loosening step (S18). The laundry has been stuck to the inner wall of the washing tub 4 due to the rotation during the waiting time T2. Therefore, by rotating the washing tub 4 in the opposite direction, i.e., 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.

[0095] Next, the control unit C determines whether the time T is longer than the drying time T1 (S19). If the time T is longer than the drying time T1 (Yes in S19), the control unit C ends the drying process. If the time T is shorter than the drying time T1 (No in S19), the control unit C returns to step 11 and executes the second drying step.

[0096] (summary) The above explanations are summarized to describe the features of the present disclosure.

[0097] Washing machine 1 according to the present embodiment does not have a drying air circulation air passage, but continuously takes in air from external space 25 and exhausts it. For this reason, housing 2 is provided with housing opening 23 so as to connect external space 25 with intake air passage 7.

[0098] In washing machine 1, air intake port 71 of air intake duct 7 and housing opening 23 are separated and arranged so that the air passing through them flows in opposite directions. This configuration requires that the drying air bends back between housing opening 23 and air intake port 71. This structure makes it difficult for water to reach heater 11. Even if heater 11 is a non-insulated type, the risk of electric shock from water or bubbles sprayed through housing opening 23 is reduced. Therefore, a non-insulated type heater 11 can be used while ensuring the safety of washing machine 1, thereby reducing the cost of washing machine 1.

[0099] Furthermore, in the operation of washing machine 1, washing tub 4 is rotated in step 11, thereby generating a swirling flow in washing tub 4. The swirling flow allows drying air to flow into drying air duct 6. This allows the fan to be omitted from the configuration of washing machine 1. This simplifies the structure of washing machine 1, further reducing the cost of washing machine 1.

[0100] (effect) The washing machine 1 according to the first embodiment can achieve the following effects.

[0101] As described above, washing machine 1 of this embodiment includes housing 2, water tub 3, washing tub 4 (rotating drum), air intake 71, air intake duct 7, heater 11, air exhaust duct 81, and air exhaust duct 8. Housing 2 has housing opening 23 communicating with internal space 26. Water tub 3 is provided in internal space 26. Washing tub 4 is provided in water tub 3 so as to be rotatable around rotation axis V0. Air intake duct 71 is provided in communication with internal space 26 and takes in drying air. Air intake duct 7 supplies drying air from air intake duct 71 to air intake connection port 37 provided in water tub 3. Heater 11 is disposed in air intake duct 7. Air exhaust port 81 is formed in housing 2, and exhausts drying air. Air exhaust duct 8 supplies drying air from exhaust connection port 38 provided along the outer periphery of water tub 3 to exhaust port 81. The opening direction of the housing opening 23 (front side M1) is different from the opening direction of the intake port 71 (rear side M2).

[0102] This configuration makes it difficult for water that has passed through the housing opening 23 to reach the heater 11. This reduces the risk of electric shock to the non-insulated heater 11 from water or bubbles sprayed through the housing opening 23. Because the housing opening 23 and the air intake 71 are separated from each other, lint that has flowed in from the housing opening 23 is difficult to reach the heater 11. Therefore, even if a filter is not provided between the air intake 71 and the heater 11, it is possible to prevent lint from adhering to the heater 11. Furthermore, not providing a filter reduces pressure loss of the drying air in the drying air duct 6, improving drying performance.

[0103] In addition, in washing machine 1 of the present embodiment, air intake 71 is formed above water tub 3, and heater 11 is disposed above water tub 3.

[0104] With this configuration, water from the water tank 3 is less likely to splash on the heater 11.

[0105] In addition, in the washing machine 1 of this embodiment, the housing 2 has an opening 20 (an opening) for inserting clothes on the front surface 2A, and the housing opening 23 is formed on the front surface 2A above the opening 20. The air intake 71 opens toward the rear side M2.

[0106] With this configuration, the drying air passes through the housing opening 23 to the rear side M2 ​​and then 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 the opposite direction. Therefore, the drying air that has passed through the housing opening 23 turns back and flows into the intake port 71. This makes it even more difficult for the water that has passed through the housing opening 23 to reach the heater 11.

[0107] In addition, in the washing machine 1 of this embodiment, the intake airflow path 7 extends from the intake port 71 toward the intake connection port 37 on the front side M1.

[0108] With this configuration, by providing the exhaust connection port 38 on the rear side M2, it is possible to configure the intake connection port 37 away from the exhaust connection port 38. By lengthening the path of the drying air in the washing tub 4, it is possible to improve the drying efficiency.

[0109] In addition, in the washing machine 1 of this embodiment, the heater 11 faces the air intake 71.

[0110] With this configuration, the heater 11 can be spaced apart from the housing opening 23 in the intake airflow path 7 extending to the front side M1.

[0111] In addition, in the washing machine 1 of this embodiment, the housing 2 has an opening 20 for inserting clothes on the front surface 2A. A housing opening 23 is formed above the opening 20 on the front surface 2A. An openable and closable door 21 is provided in the opening 20. The door 21 has a door packing member 28 that fits tightly against the outer periphery of the opening 20. The door packing member 28 faces the housing opening 23 and forms an air passage 24 that connects the outside of the housing 2 with the housing opening 23.

[0112] This configuration allows drying air to flow into internal space 26. In addition, since opening 20 is sealed by door packing member 28, water in washing tub 4 is less likely to flow out of opening 20 and into ventilation passage 24 provided above door packing member 28.

[0113] In addition, in the washing machine 1 of this embodiment, the ventilation passage 24 is curved.

[0114] With this configuration, it is possible to prevent water from passing through the ventilation passage 24 and entering the internal space 26 while ensuring the inflow of drying air.

[0115] In washing machine 1 of the present embodiment, ventilation passage 24 extends between inlet 24A facing the outside of housing 2 and outlet 24B on the opposite side, with inlet 24A opening in the horizontal direction and outlet 24B opening upward. Housing opening 23 opens in the horizontal direction.

[0116] With this configuration, a labyrinth structure can be formed by ventilation passage 24 and housing opening 23. This further prevents water from passing through ventilation passage 24 and entering internal space 26.

[0117] In addition, in the washing machine 1 of this embodiment, the heater 11 is of a non-insulated type.

[0118] With this configuration, an inexpensive heater can be used, making it possible to provide an inexpensive washing machine 1.

[0119] Furthermore, the washing machine 1 of this embodiment does not have an air blowing mechanism disposed in the intake air duct 7 or the exhaust air duct 8.

[0120] With this configuration, an air blowing mechanism such as a fan can be omitted, making it possible to provide an inexpensive washing machine 1.

[0121] In addition, in the washing machine 1 of this embodiment, a flow of drying air is generated in the intake air duct 7 or the exhaust air duct 8 due to the rotation of the washing tub 4.

[0122] With this configuration, even in the washing machine 1 that does not have a blowing mechanism such as a fan, the drying function can be ensured.

[0123] The washing machine 1 of this embodiment further includes a control unit C that executes a spin-drying process and a drying process. The control unit C rotates the washing tub 4 in a first rotation direction R1 during the drying process, and rotates the washing tub 4 in a second rotation direction R2 opposite to the first rotation direction R1 during the spin-drying process.

[0124] With this configuration, exhaust from exhaust air duct 8 can be ensured in the drying process, while the outflow of bubbles and water through exhaust air duct 8 can be suppressed in the spin-drying process.

[0125] In addition, in the washing machine 1 of this embodiment, the control unit C executes a first drying step and a second drying step as the drying process. The washing machine 1 has a loosening step between the first drying step and the second drying step in which the washing tub 4 is rotated in the second rotation direction R2.

[0126] This configuration allows the laundry to be loosened during the drying process, thereby preventing wrinkles from forming in the laundry.

[0127] In addition, in washing machine 1 of the present embodiment, in a front view seen from the direction in which rotation axis V0 extends, exhaust connection port 38 is formed above a horizontal plane including rotation axis V0 and upstream of the apex of water tub 3 when seen from first rotation direction R1. Exhaust airflow duct 8 extends upward.

[0128] With this 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, bubbles generated in the spin-drying process are less likely to flow into exhaust air duct 8.

[0129] In addition, in the washing machine 1 of this embodiment, the rotation axis V0 extends substantially horizontally.

[0130] With this configuration, compared to a structure in which washing tub 4 is tilted, it is easier to secure space above washing tub 4 in internal space 26 of housing 2. Therefore, the space above washing tub 4 can be effectively utilized, thereby realizing space-saving for washing machine 1.

[0131] In addition, in washing machine 1 of the present embodiment, intake air passage 7 is provided with check valve 75 (first valve), and exhaust air passage 8 is provided with valve 85 (second valve) of a type different from check valve 75. Valve 85 is a ball valve.

[0132] With this configuration, the check valve 75 can restrict bubbles flowing in a direction opposite to the air flow, and the valve 85 can restrict bubbles flowing in the same direction as the air.

[0133] The present disclosure is not limited to the above-described embodiment, but can be embodied in various other forms.

[0134] In the embodiment, an example has been described in which the rotation directions are opposite between the spinning process and the drying process, but this is not limiting. For example, the rotation direction between the spinning process and the drying process may be a 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. Furthermore, the rotation direction between the spinning process and the drying process may be a 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.

[0135] The washing machine in the first aspect comprises a housing having a housing opening communicating with the internal space, a water tub provided in the internal space, a rotating drum provided in the water tub so as to be rotatable around a rotation axis, an air intake provided in communication with the internal space and through which drying air is taken in, an air intake duct that supplies drying air from the air intake to an air intake connection provided in the water tub, a heater arranged in the air intake duct, an exhaust port formed in the housing through which the drying air is exhausted, and an exhaust duct that supplies drying air from an exhaust connection provided along the outer periphery of the water tub to the exhaust port, and the direction in which the housing opening opens is different from the direction in which the air intake opens.

[0136] In the washing machine of the second aspect, in the washing machine of the first aspect, the air intake is formed above the water tub, and the heater is disposed above the water tub.

[0137] As a washing machine in the third aspect, in the washing machine in the first or second aspect, the housing has an inlet for putting clothes in on the front, the housing opening is formed on the front above the inlet, and the air intake opens toward the rear.

[0138] A fourth aspect of the washing machine is the washing machine of the third aspect, wherein the intake air passage extends forward from the air intake port toward the air intake connection port.

[0139] In a fifth aspect of the washing machine, the heater in the washing machine in the fourth aspect faces the air intake port.

[0140] As a washing machine in a sixth aspect, in the washing machine in any of the first to fifth aspects, the housing has an inlet for putting clothes in on the front, the housing opening is formed on the front above the inlet, the inlet is provided with an openable door, the door has a door gasket member that fits tightly against the outer periphery of the inlet, and the door gasket member faces the housing opening and forms a ventilation passage that connects the outside of the housing with the housing opening.

[0141] A seventh aspect of the present invention relates to the washing machine of the sixth aspect, wherein the ventilation passage is curved.

[0142] As a washing machine in an eighth aspect, in the washing machine in the seventh aspect, the ventilation passage extends between an inlet facing the outside of the housing and an outlet on the opposite side, the inlet opens horizontally, the outlet opens upward, and the housing opening opens horizontally.

[0143] A ninth aspect of the washing machine is the washing machine according to any one of the first to eighth aspects, wherein the heater is a non-insulated type.

[0144] A washing machine according to a tenth aspect is the washing machine according to any one of the first to ninth aspects, which does not have a blower mechanism disposed in the intake air duct or the exhaust air duct.

[0145] As a washing machine according to an 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 duct or the exhaust air duct by the rotation of the rotary drum.

[0146] In a twelfth aspect, the washing machine is a washing machine in any one of the first to eleventh aspects, further comprising a control unit that executes a dehydration process and a drying process, and the control unit rotates the rotating drum in a first rotation direction in the drying process, and rotates the rotating drum in a second rotation direction opposite to the first rotation direction in the dehydration process.

[0147] As a washing machine in a 13th aspect, in the washing machine in the 12th aspect, the control unit executes a first drying step and a second drying step as a drying process, and has a loosening step between the first drying step and the second drying step in which the rotating drum is rotated in a second rotation direction.

[0148] In the washing machine of the 14th aspect, in the washing machine of the 12th aspect, when viewed from the front in the direction in which the rotating shaft extends, the exhaust connection port is formed above a horizontal plane including the rotating shaft and upstream of the top of the water tub when viewed from the first rotation direction, and the exhaust air duct extends upward.

[0149] In a fifteenth aspect, the washing machine is the washing machine according to any one of the first to fourteenth aspects, wherein the rotation axis extends substantially horizontally.

[0150] A washing machine in a 16th aspect is a washing machine in any one of the first to fifteenth aspects, in which a first valve is provided in the intake air duct and a second valve of a type different from the first valve is provided in the exhaust air duct, the first valve being a check valve and the second valve being a ball valve.

[0151] As a washing machine in a 17th aspect, in the washing machine in any of the first to sixteenth aspects, the exhaust connection port has a first side and a second side along the rotation axis, and when viewed from the rotation direction of the spin-drying process, the first side is located downstream of the second side, and has a rib protruding from the first side toward the second side.

[0152] Although the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art, and such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims unless they depart therefrom. [Industrial Applicability]

[0153] The washing machine of the present disclosure can achieve a drying function with a simple structure, and is therefore useful as a home washing machine, a commercial washing machine, or any type of washer-dryer (for example, a home drum washing machine or a vertical washing machine). [Explanation of symbols]

[0154] 1 washing machine 2. Case 3. Aquarium 4 Washing machine 5 Detergent supply unit 6 Drying air path 7 Intake air duct 8 Exhaust air duct 11 Heater 20 aperture 21 Door 23 Housing opening 24 Ventilation duct 26 Interior Space 34 Cylinder part 36 Bottom 37 Intake connection port 38 Exhaust connection port 71 Air intake 75 Check valve 81 Exhaust port 85 valves

Claims

1. a housing having a housing opening communicating with the internal space; a water tank provided in the internal space; a rotary drum rotatably mounted on the water tank around a rotation axis; an air intake port provided in communication with the internal space and through which drying air is taken in; an intake air duct that supplies the drying air from the intake port to an intake connection port provided in the water tank; a heater disposed in the intake air passage; an exhaust port formed in the housing and through which the drying air is exhausted; an exhaust air duct that supplies the drying air to the exhaust port from an exhaust connection port provided along the outer periphery of the water tank, The housing has an opening for inserting clothes on the front surface, the housing opening is formed on the front surface above the input port, The inlet is provided with an openable and closable door, The door has a door packing member that is in close contact with the outer periphery of the insertion port, the door packing member faces the housing opening and forms a ventilation passage that connects the outside of the housing with the housing opening; The air intake port opens toward the rear side of the washing machine.

2. The air intake is formed above the water tank, The washing machine according to claim 1 , wherein the heater is disposed above the water tub.

3. The washing machine according to claim 1 , wherein the intake air passage extends forward from the air intake port toward the air intake connection port.

4. The washing machine according to claim 3 , wherein the heater faces the air intake.

5. The washing machine according to claim 1 , wherein the air passage is curved.

6. The ventilation passage extends between an inlet facing the outside of the housing and an outlet on the opposite side, The inlet opens laterally and the outlet opens upward, The washing machine according to claim 5, wherein the housing opening is open in the lateral direction.

7. The washing machine according to claim 1, wherein the heater is of a non-insulated type.

8. The washing machine according to claim 1 , wherein the washing machine does not have a blower mechanism disposed in the intake air duct or the exhaust air duct.

9. The washing machine according to claim 1, wherein the flow of the drying air is generated in the intake air duct or the exhaust air duct by rotation of the rotary drum.

10. Further, a control unit that executes a dehydration process and a drying process is included.

2. The washing machine according to claim 1, wherein the control unit rotates the rotating drum in a first rotation direction in the drying process, and rotates the rotating drum in a second rotation direction opposite to the first rotation direction in the dehydration process.

11. the control unit executes a first drying step and a second drying step as the drying process, The washing machine according to claim 10, further comprising a loosening step of rotating the rotary drum in the second rotation direction between the first drying step and the second drying step.

12. When viewed from the front in the direction in which the rotation shaft extends, the exhaust connection port is formed above a horizontal plane including the rotation shaft and upstream of a top of the water tank when viewed from the first rotation direction, The washing machine according to claim 10, wherein the exhaust air duct extends upward.

13. The washing machine according to claim 1 , wherein the rotation axis extends substantially horizontally.

14. a first valve is provided in the intake air passage; a second valve of a type different from the first valve is provided in the exhaust air passage, 14. The washing machine of claim 1, wherein the first valve is a check valve and the second valve is a ball valve.

15. A housing having a housing opening communicating with an internal space; a water tank provided in the internal space; a rotary drum rotatably mounted on the water tank around a rotation axis; an air intake port provided in communication with the internal space and through which drying air is taken in; an intake air duct that supplies the drying air from the intake port to an intake connection port provided in the water tank; a heater disposed in the intake air passage; an exhaust port formed in the housing and through which the drying air is exhausted; an exhaust air duct that supplies the drying air to the exhaust port from an exhaust connection port provided along the outer periphery of the water tank, The housing opening and the intake port are opened in different directions, the exhaust connection port has a first side and a second side along the rotation axis, When viewed from the rotation direction in the dewatering process, the first side is provided downstream of the second side, The washing machine has a rib protruding from the first side toward the second side.

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