Dish washing machine

By setting up heat exchanger parts and water tanks in the dishwasher and using heat conductor parts, the problem of large electricity consumption of the dishwasher is solved, and energy saving effect and effective heat recovery and utilization are achieved.

CN223232663UActive Publication Date: 2025-08-19HISENSE (SHANDONG) KITCHEN & BATHROOM CO LTD
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Patent Information

Application Number
CN202420453601.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-08
Publication Date
2025-08-19
Estimated Expiration
2034-03-08

AI Technical Summary

Technical Problem

During the cleaning process, the dishwasher consumes a lot of electricity due to heating the washing water multiple times, and lacks effective energy-saving measures.

Method used

By setting up a heat exchanger and a water tank in the dishwasher, heat exchange is circulated between the cavity and the heat exchange chamber, reducing the heating time of water in the water tank, and combining heat conducting parts to improve heat transfer efficiency, achieving rapid heating of water in the water tank.

Benefits of technology

It reduces the electricity consumption of water heating by the dishwasher, improves energy saving effect, and effectively recycles heat from hot gas, reducing overall energy consumption.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a dish-washing machine, which relates to the field of household appliances and is used for solving the problem of high power consumption of the dish-washing machine. Comprising a shell, an inner container, a heat exchange piece and a water tank. A containing cavity is formed in the shell. The inner container is arranged in the containing cavity, and a cavity is formed in the inner container. The heat exchange piece is connected to the inner container, a heat exchange cavity, a first air inlet and a first air outlet are formed in the heat exchange piece, the first air inlet and the first air outlet communicate with the heat exchange cavity, and the first air inlet and the first air outlet communicate with the cavity. The water tank is arranged in the containing cavity and located outside the heat exchange cavity, and the water tank is connected to the heat exchange piece and is in heat conduction with the heat exchange piece. And hot air in the cavity can circularly flow between the cavity and the heat exchange cavity through the first air inlet and the first air outlet, so that the hot air in the cavity exchanges heat with water in the water tank. The tableware cleaning device is used for cleaning tableware.
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Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a dishwasher. Background Art

[0002] As people's living standards improve, dishwashers, as a cleaning device for washing dishes, are becoming increasingly popular. Dishwashers wash dishes by introducing cleaning fluid into the dishwashing machine's interior, so that the dishes are cleaned by the cleaning fluid.

[0003] In the related art, in order to improve the cleaning effect of the dishwasher on the tableware, hot water of a certain temperature is usually used when the dishwasher washes the tableware, so as to clean the grease on the tableware with the hot water and disinfect the tableware.

[0004] During the entire dishwashing process of the dishwasher, the dishes usually need to be washed multiple times, and each washing process requires heating the washing water, which results in a large amount of electricity consumption of the dishwasher. Utility Model Content

[0005] An embodiment of the utility model provides a dishwasher, which is used to solve the problem of high power consumption of dishwashers.

[0006] To achieve the above-mentioned purpose, in a first aspect of the present application, a dishwasher is provided, comprising a shell, an inner tank, a heat exchange element and a water tank. A accommodating cavity is formed in the shell. The inner tank is arranged in the accommodating cavity, and the inner tank forms a cavity. The heat exchange element is connected to the inner tank, and a heat exchange cavity and a first air inlet and a first air outlet connected to the heat exchange cavity are formed in the heat exchange element, and both the first air inlet and the first air outlet are connected to the cavity. The water tank is arranged in the accommodating cavity and is located outside the heat exchange cavity. The water tank is connected to the heat exchange element and is thermally conductive with the heat exchange element. The hot air in the cavity can circulate between the cavity and the heat exchange cavity through the first air inlet and the first air outlet, so that the hot air in the cavity exchanges heat with the water in the water tank.

[0007] Through the above arrangement, since the first air inlet and the first air outlet are respectively connected to the heat exchange cavity of the heat exchange element and the cavity inside the inner tank, after a washing process of the dishwasher is completed, the hot air of the washing process can enter the first air inlet from the cavity, and then enter the heat exchange cavity through the first air inlet. The hot air entering the heat exchange cavity can flow back into the cavity through the first air outlet, so that the hot air circulates between the cavity and the heat exchange cavity.

[0008] Since the water tank and the heat exchange element are thermally conductive, when the hot air circulates between the cavity and the heat exchange cavity, the hot air can exchange heat with the water inside the water tank through the heat exchange element and the water tank, thereby heating the water inside the water tank.

[0009] In this way, when the dishes are washed for the next time, the water inside the water tank can be used to clean the dishes. Since the water inside the water tank has been heated by hot air, when the water inside the water tank is used to wash the dishes, if the water inside the water tank still needs to be heated, the heating time of the water in the water tank can be shortened, thereby reducing the electric energy consumed for heating the washing water. This can reduce the power consumption required by the dishwasher, thereby improving the energy-saving effect of the dishwasher.

[0010] In some embodiments of the present application, the dishwasher further includes a heat conductor connected between the heat exchange element and the water tank, and the heat exchange element and the water tank conduct heat through the heat conductor.

[0011] With this arrangement, when the heat from the hot air is transferred to the heat exchanger, the heat from the heat exchanger can be transferred to the heat conductor. Due to the high thermal conductivity of the heat conductor, the heat from the heat exchanger can be quickly transferred to the heat conductor. Simultaneously, the heat from the heat conductor can also be quickly transferred to the water tank, thereby heating the water inside. This arrangement allows the heat from the heat exchanger to be quickly transferred to the water tank, reducing heat loss during the transfer process from the heat exchanger to the water tank, thereby improving the heat exchange between the water in the water tank and the hot air, further enhancing the energy efficiency of the dishwasher.

[0012] In some embodiments of the present application, the heat conductive member includes a heat conductive plate. Along the thickness direction of the heat conductive plate, one side surface of the heat conductive plate is in contact with the side surface of the heat exchange member close to the water tank, and the other side surface of the heat conductive plate is in contact with the side surface of the water tank close to the heat exchange member.

[0013] With this arrangement, since the thickness of the heat conducting sheet is relatively small, the heat transfer distance in the thickness direction of the heat conducting sheet is also relatively small. As a result, when heat from the heat exchange element is transferred to the water tank, the heat from the heat exchange element can be transferred to the water tank more quickly, thereby further improving the heat exchange effect between the water in the water tank and the hot air.

[0014] In some embodiments of the present application, a first opening communicating with the heat exchange cavity is opened on a side of the heat exchange element close to the water tank, and the heat conductive element is located at the first opening and blocks the first opening.

[0015] And / or, a second opening communicating with the interior of the water tank is opened on a side surface of the water tank close to the heat exchange element, and the heat conducting element is located at the second opening and blocks the second opening.

[0016] Through the above-mentioned arrangement, the heat in the hot air can be transferred to the heat conductor more quickly, and the heat on the heat conductor can be transferred to the water in the water tank more quickly. This can reduce the heat loss in the process of transferring the heat in the hot air to the heat conductor and the heat on the heat conductor to the water in the water tank, thereby improving the heat exchange effect between the water in the water tank and the hot air.

[0017] In some embodiments of the present application, the heat exchange chamber includes an air inlet chamber and an air outlet chamber that are isolated from each other, wherein the first air inlet communicates with the air inlet chamber, and the first air outlet communicates with the air outlet chamber. The heat exchange element further includes a second air outlet communicated with the air inlet chamber, and a second air inlet communicated with the air outlet chamber.

[0018] The dishwasher also includes a connecting member and a fan. The connecting member is connected to the housing and defines a connecting passage that connects the second air inlet and the second air outlet. The fan is disposed within the connecting passage and fixed to the connecting member, and is configured to transport hot air from the air inlet chamber to the air outlet chamber.

[0019] Through the above-mentioned setting, since the cavity is connected with the air inlet cavity through the first air inlet, and is connected with the air outlet cavity through the first air outlet, under the action of the fan, the hot air in the cavity can flow through the air inlet cavity, the connecting channel and the air outlet cavity in sequence, and flow back into the cavity, thereby realizing the circulation of the hot air in the cavity between the cavity and the heat exchange cavity, thereby realizing the heat exchange between the water in the water tank and the hot air in the heat exchange cavity.

[0020] In some embodiments of the present application, the volume of the air inlet cavity is larger than the volume of the air outlet cavity. And / or the area of the wall of the air inlet cavity close to the water tank is larger than the area of the wall of the air outlet cavity close to the water tank.

[0021] Through the above setting, when the dishwasher completes the cleaning of the dishes, since the volume of the air inlet chamber is larger than the volume of the air outlet chamber, the hot air in the cavity can enter the air inlet chamber in large quantities and directly exchange heat with the water in the water tank. This can reduce the heat loss in the process of hot air flowing between the air inlet chamber and the heat exchange chamber, thereby improving the water tank's recovery effect on the hot air in the cavity, thereby reducing the waste of heat in the hot air.

[0022] At the same time, since the area of the wall of the air inlet chamber close to the water tank is larger than the area of the wall of the air outlet chamber close to the water tank, most of the hot air can complete the heat exchange with the water in the water tank in the air inlet chamber, thereby reducing the heat loss in the process of hot air flowing between the air inlet chamber and the heat exchange chamber, thereby improving the water tank's recovery effect on the hot air in the cavity and reducing the waste of heat in the hot air.

[0023] In some embodiments of the present application, the connecting member includes a chassis, an air inlet duct, and an air outlet duct. A ventilation cavity is formed within the chassis, and a fan is disposed within the ventilation cavity and connected to the chassis. One end of the air inlet duct is connected to the second air outlet, and the other end of the air inlet duct is connected to the ventilation cavity. One end of the air outlet duct is connected to the second air inlet, and the other end of the air outlet duct is connected to the ventilation cavity. The air inlet duct, ventilation cavity, and air outlet duct are sequentially connected to form a connecting channel.

[0024] With the above arrangement, after the hot air enters the air inlet cavity, since one end of the air inlet duct is connected to the second air outlet and the other end of the air inlet duct is connected to the ventilation cavity, the hot air in the air inlet cavity can enter the ventilation cavity through the air inlet duct. Furthermore, since one end of the air outlet duct is connected to the second air inlet and the other end of the air outlet duct is connected to the ventilation cavity, the hot air in the cavity can continue to flow toward the air outlet cavity through the air outlet duct and into the air outlet cavity after entering the ventilation cavity. In this way, after entering the air inlet cavity, the hot air in the cavity can flow through the air inlet cavity, the air inlet duct, the ventilation cavity, the air outlet duct, and the air outlet cavity in sequence, and finally flow back into the cavity, thereby ensuring that the hot air can circulate between the cavity and the heat exchange cavity.

[0025] In some embodiments of the present application, the housing includes an outer shell and a base. A housing cavity is formed within the outer shell. The base is disposed within the housing cavity and connected to the outer shell. The inner liner is disposed on the base and connected to at least one of the base and the outer shell. The heat exchange element is connected to an outer wall surface of the inner liner in a first direction, and the water tank is connected to a surface of the heat exchange element facing away from the inner liner. The first direction is perpendicular to the arrangement of the inner liner and the base. And / or, the connecting element and the fan are connected to the base.

[0026] With the above arrangement, the inner tank, heat exchange element, and water tank are sequentially arranged. This allows the shape of the heat exchange element and water tank to match the wall of the inner tank near the heat exchange element. While ensuring their heat exchange efficiency, the dimensions of the heat exchange element and water tank can be reduced along the first direction, thereby reducing the space occupied by the heat exchange element and water tank in the accommodating cavity, thereby improving the utilization rate of the space in the accommodating cavity. Furthermore, the base supports the connecting element and fan, allowing them to be stably arranged within the accommodating cavity.

[0027] In some embodiments of the present application, the dishwasher further includes a drainage pipe, the water inlet end of the drainage pipe being connected to the heat exchange chamber, and the water outlet end of the drainage pipe being connected to the outside of the heat exchange chamber, for discharging condensed water generated in the heat exchange chamber to the outside of the heat exchange chamber.

[0028] Through the above arrangement, when the hot air condenses in the heat exchange chamber and forms condensed water, the condensed water can be discharged to the outside of the dishwasher through the drainage pipe connected to the heat exchange chamber. This can prevent the condensed water from accumulating in the heat exchange chamber, thereby preventing the condensed water from absorbing too much heat from the hot air entering the heat exchange chamber, thereby reducing the waste of heat in the hot air.

[0029] In a second aspect of the present application, a dishwasher is provided, comprising a shell, an inner liner, a heat exchange element, and a water tank. A accommodating cavity is formed in the shell. The inner liner is disposed in the accommodating cavity, and the inner liner forms a cavity. The heat exchange element is connected to the inner liner, and a heat exchange cavity and a first air inlet and a first air outlet communicating with the heat exchange cavity are formed in the heat exchange element, and both the first air inlet and the first air outlet are communicated with the cavity. The water tank is connected to the heat exchange element and is thermally conductive with the heat exchange element. The hot air in the cavity can circulate between the cavity and the heat exchange cavity through the first air inlet and the first air outlet, so that the hot air in the cavity exchanges heat with the water in the water tank.

[0030] The dishwasher provided in the second aspect of this application can achieve the same beneficial effects as the above technical solution, so it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the external structure of a dishwasher provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of the external structure of the base provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of another external structure of a dishwasher provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of the external structure of a heat exchanger and a water tank provided in an embodiment of the present application;

[0035] Figure 5 A schematic diagram of the external structure of a drainage pipe provided in an embodiment of the present application;

[0036] Figure 6 A schematic diagram of the external structure of the heat conducting member provided in an embodiment of the present application;

[0037] Figure 7 A schematic diagram of the external structure of a heat exchanger provided in an embodiment of the present application;

[0038] Figure 8 A schematic diagram of the external structure of the heat exchange element and the heat conducting element provided in an embodiment of the present application;

[0039] Figure 9 A schematic diagram of the external structure of a water tank provided in an embodiment of the present application;

[0040] Figure 10 A schematic diagram of the external structure of the water tank and heat conducting member provided in an embodiment of the present application;

[0041] Figure 11 A schematic diagram of the external structure of the heat exchange chamber provided in an embodiment of the present application;

[0042] Figure 12 for Figure 11 A partial enlarged schematic diagram of point A in the middle;

[0043] Figure 13 A schematic diagram showing the positional relationship between the inner tank, heat exchange element, and water tank provided in an embodiment of the present application;

[0044] Figure 14 A schematic diagram of the external structure of the connecting piece provided in an embodiment of the present application;

[0045] Figure 15 A schematic diagram of another external structure of a heat exchange element provided in an embodiment of the present application;

[0046] Figure 16 A schematic diagram of another external structure of the heat exchange element provided in an embodiment of the present application;

[0047] Figure 17 A schematic diagram of the positional relationship between the cover plate and the heat conducting member provided in an embodiment of the present application;

[0048] Figure 18 A schematic diagram of another external structure of the heat exchange element provided in an embodiment of the present application;

[0049] Figure 19 A schematic diagram of another external structure of a dishwasher provided in an embodiment of the present application;

[0050] Figure 20 for Figure 19 A partial enlarged schematic diagram of point B in the middle.

[0051] Reference numerals: 01-dishwasher; 1-inner tank; 11-cavity; 2-base; 21-bottom plate; 22-bracket; 3-heat exchange element; 31-heat exchange cavity; 311-air inlet cavity; 312-air outlet cavity; 32-first air inlet; 33-first air outlet; 34-first opening; 35-second air inlet; 36-second air outlet; 301-first sub-plate; 3011-first plate segment; 3012-second plate segment; 3 02-second sub-board; 303-third sub-board; 304-fourth sub-board; 3041-third board segment; 3042-fourth board segment; 305-cover plate; 306-first partition; 307-second partition; 4-water tank; 41-second opening; 5-drainage pipe; 6-heat conducting part; 7-connecting part; 71-chassis; 72-air inlet duct; 73-air outlet duct; X-first direction; M-first cavity; N-second cavity. DETAILED DESCRIPTION

[0052] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0053] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, when describing pipelines or channels, the "connected" and "connected" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0056] In the embodiments of this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.

[0057] As people's living standards improve, dishwashers, as a cleaning device for washing dishes, are becoming increasingly popular. Dishwashers wash dishes by introducing cleaning fluid into the dishwashing machine's interior, so that the dishes are cleaned by the cleaning fluid.

[0058] Based on this, the present application provides a dishwasher, such as Figure 1As shown, the dishwasher 01 includes a housing (not shown in the figure). A receiving cavity is formed in the housing, and the receiving cavity is used to arrange various components of the dishwasher.

[0059] A first placement opening communicating with the accommodating cavity is formed in the shell. Exemplarily, the first placement opening is opened on one side of the shell in the horizontal direction.

[0060] like Figure 1 As shown, the dishwasher 01 further includes an inner liner 1. The inner liner 1 is disposed in the receiving cavity and is connected to the housing. The inner liner 1 is used to place dishes to be washed. Specifically, the inner liner 1 is formed with a cavity 11, and the dishes to be washed can be placed in the cavity 11.

[0061] The inner container is further formed with a second placement opening communicated with the cavity 11. Tableware to be washed can be placed in the cavity 11 through the second placement opening.

[0062] The second placement opening and the first placement opening have the same orientation, so that dishes to be washed can be placed into the cavity 11 through the first placement opening and the second placement opening.

[0063] Exemplarily, the plane where the first placement opening is located coincides with the plane where the second placement opening is located.

[0064] Exemplarily, the plane where the first placement opening is located is parallel to the plane where the second placement opening is located. At this time, the distance between the plane where the first placement opening is located and the plane where the second placement opening is located is small, and the plane where the second placement opening is located is located on the side of the plane where the first placement opening is located close to the bottom wall surface of the accommodating cavity.

[0065] The dishwasher 01 further includes a door body, which is connected to the first placement opening and is used to open or close the first placement opening.

[0066] When the dishes to be washed need to be washed, the user can open the door of the dishwasher 01, put the dishes to be washed into the cavity 11, then close the door and start the corresponding program on the dishwasher 01, so that the dishwasher 01 can wash the dishes.

[0067] like Figure 1 、 Figure 2 As shown, the housing includes an outer shell and a base 2, with a housing formed within the outer shell. The base 2 is disposed within the housing and connected to the outer shell. The inner liner 1 is disposed on the base 2 and connected to at least one of the base 2 and the outer shell. Specifically, the base 2 is disposed on the underside of the inner liner 1 and serves to provide support for the inner liner 1, ensuring that the inner liner 1 can be stably disposed within the housing.

[0068] In some examples, such as Figure 2As shown, the base 2 includes a bottom plate 21 and multiple brackets 22. The bottom plate 21 is located on the lower side of the inner liner 1 and is spaced apart from the inner liner 1. The multiple brackets 22 are connected between the bottom plate 21 and the inner liner 1 and are connected to both the bottom plate 21 and the inner liner 1.

[0069] In this way, a certain space is formed between the bottom plate 21 and the inner container 1, so that the working components of the dishwasher 01 can be arranged in the space.

[0070] In some examples, the working components include a water outlet pipe, a water inlet pipe, and a water pump, and the water outlet pipe, the water inlet pipe, and the motor are all arranged between the bottom plate 21 and the inner tank 1.

[0071] The water inlet pipe is connected to the cavity 11 of the inner tank 1 and is used to introduce cleaning water into the cavity 11 of the inner tank 1. The water outlet pipe is connected to the cavity 11 of the inner tank 1 and is used to discharge the dirty water from the inner tank 1 after the dishwasher 01 finishes washing the dishes. The water pump is connected to the water inlet pipe and is used to generate water pressure to make the cleaning water flow in the water inlet pipe.

[0072] In order to improve the cleaning effect of the dishwasher 01 on tableware, when the dishwasher 01 washes the tableware, the cleaning water introduced into the cavity 11 is usually heated so that the hot water can be used to clean the grease on the tableware and disinfect the tableware.

[0073] During the entire process of washing dishes by the dishwasher 01 , the dishes usually need to be washed multiple times, and each washing process requires heating the washing water, which results in a large amount of power consumption by the dishwasher 01 .

[0074] Based on this, Figure 3 、 Figure 4 As shown, the dishwasher 01 further includes a heat exchange element 3 and a water tank 4 .

[0075] The heat exchange element 3 is connected to the inner tank 1 , and a heat exchange cavity 31 and a first air inlet 32 and a first air outlet 33 communicating with the heat exchange cavity 31 are formed in the heat exchange element 3 . Both the first air inlet 32 and the first air outlet 33 are communicated with the cavity 11 .

[0076] The water tank 4 is disposed in the accommodating cavity. The water tank 4 is connected to the heat exchange element 3 and is thermally conductive with the heat exchange element 3 .

[0077] In some examples, the water tank 4 is connected to a water pipe, and the water in the water tank 4 can be transported to the inner pot 1 through the water pipe to wash the tableware in the inner pot 1.

[0078] The hot air in the cavity 11 can circulate between the cavity 11 and the heat exchange cavity 31 through the first air inlet 32 and the first air outlet 33 , so that the hot air in the cavity 11 exchanges heat with the water in the water tank 4 .

[0079] Exemplarily, the hot air in the cavity 11 includes high-temperature water vapor generated by evaporation of cleaning water.

[0080] Exemplarily, the hot air in the cavity 11 includes air in the cavity 11 whose temperature rises after absorbing heat from the cleaning water.

[0081] For example, Figure 4 As shown, the water tank 4 can be arranged in the heat exchange cavity 31 , and the outer peripheral wall surface of the water tank 4 can all be in contact with the hot air, so that the hot air in the cavity 11 can exchange heat with the water in the water tank 4 .

[0082] The water tank 4 may also be at least partially disposed outside the heat exchange chamber 31. For example, Figure 3 As shown, the water tank 4 is arranged outside the heat exchange chamber 31.

[0083] Through the above-mentioned arrangement, since the first air inlet 32 and the first air outlet 33 respectively connect the heat exchange cavity 31 of the heat exchange component 3 and the cavity 11 inside the inner tank 1, after a washing process of the dishwasher 01 is completed, the hot air of the washing process can enter the first air inlet 32 from the cavity 11, and then enter the heat exchange cavity 31 through the first air inlet 32. The hot air entering the heat exchange cavity 31 can flow back to the cavity 11 through the first air outlet 33, so that the hot air circulates between the cavity 11 and the heat exchange cavity 31.

[0084] Since the water tank 4 is thermally connected to the heat exchange element 3, when the hot air circulates between the cavity 11 and the heat exchange cavity 31, the hot air can exchange heat with the water inside the water tank 4 through the heat exchange element 3 and the water tank 4, thereby heating the water inside the water tank 4.

[0085] In this way, when the dishes are washed for the next time, the water in the water tank 4 can be used to clean the dishes. Since the water in the water tank 4 has been heated by hot air, when the water in the water tank 4 is used to clean the dishes, if the water in the water tank 4 still needs to be heated, the heating time of the water in the water tank 4 can be shortened, thereby reducing the electric energy required for heating the washing water. This can reduce the power consumption required by the dishwasher 01, thereby improving the energy-saving effect of the dishwasher 01.

[0086] Furthermore, since the water in the water tank 4 is heated by heat exchange between the hot air in the cavity 11 and the water in the water tank 4, the heat in the hot air is absorbed by the water tank 4, and the heat in the hot air can be recovered and utilized, thereby reducing the waste of heat in the hot air.

[0087] Since the hot air will exchange heat with the water in the water tank 4 during the flow in the heat exchange chamber 31, the positive hot air after heat exchange will condense in the heat exchange chamber 31 to form condensed water, and finally converge on the side wall of the heat exchange chamber 31 close to the base 2 under the action of gravity.

[0088] In order to prevent condensed water from accumulating in the heat exchange chamber 31, in some embodiments, as shown in FIG. Figure 5 As shown, the dishwasher 01 also includes a drainage pipe 5, the water inlet end of the drainage pipe 5 is connected to the heat exchange chamber 31, and the water outlet end of the drainage pipe 5 is connected to the outside of the heat exchange chamber 31, which is used to discharge the condensed water generated in the heat exchange chamber 31 to the outside of the heat exchange chamber 31.

[0089] Illustratively, the drain pipe 5 may be directly connected to the outside of the dishwasher 01 , and the condensed water is directly discharged to the outside of the dishwasher 01 through the drain pipe 5 .

[0090] For example, the drainage pipe 5 may be connected to an outlet pipe for discharging sewage from the dishwasher 01 , and the condensed water is discharged into the outlet pipe through the drainage pipe 5 , and then discharged to the outside of the dishwasher 01 through the outlet pipe.

[0091] Through the above-mentioned arrangement, when the hot air condenses in the heat exchange chamber 31 and forms condensed water, the condensed water can be discharged to the outside of the dishwasher 01 through the drainage pipe 5 connected to the heat exchange chamber 31. This can prevent the condensed water from accumulating in the heat exchange chamber 31, thereby preventing the condensed water from absorbing too much heat from the hot air entering the heat exchange chamber 31, thereby reducing the waste of heat in the hot air.

[0092] In some examples, such as Figure 5 As shown, the water inlet end of the drainage pipe 5 is connected to the side wall of the heat exchange chamber 31 close to the base 2.

[0093] In this way, when the condensed water in the heat exchange chamber 31 gathers on the side wall of the heat exchange chamber 31 close to the base 2 under the action of gravity, since the water inlet end of the drainage pipe 5 is connected to the side wall of the heat exchange chamber 31 close to the base 2, the condensed water in the heat exchange chamber 31 can directly enter the water inlet pipe from the water inlet end of the drainage pipe 5.

[0094] In this way, the drainage pipe 5 can quickly discharge the condensed water in the heat exchange chamber 31 to the outside of the dishwasher 01, and reduce the amount of condensed water that can accumulate on the side wall of the heat exchange chamber 31 close to the base 2, thereby better avoiding the condensed water from absorbing too much heat from the hot air entering the heat exchange chamber 31, and further reducing the waste of heat in the hot air.

[0095] In some examples, a heat-insulating material is provided on the outer wall of the water tank 4. Thus, when the water in the water tank 4 exchanges heat with the hot air in the heat exchange chamber 31, the heat-insulating material can reduce the amount of heat in the water in the water tank 4 that is dissipated from the outer wall of the water tank 4 into the air. This ensures that the temperature of the water in the water tank 4 is maintained, further reducing the electrical energy required to heat the washing water, and thus improving the energy-saving effect of the dishwasher 01.

[0096] Exemplarily, the heat-insulating material is heat-insulating cotton, which is wrapped around the outer wall of the water tank 4 .

[0097] For example, the heat exchange element 3 and the water tank 4 can be in direct contact, so that the heat in the hot air is transferred to the heat exchange element 3, and then directly transferred to the water tank 4, and then transferred to the water inside the water tank 4, thereby heating the water inside the water tank 4.

[0098] For example, the heat exchange element 3 and the water tank 4 may also be in indirect contact. Figure 6 As shown, the dishwasher 01 further includes a heat conductor 6 , which is connected between the heat exchanger 3 and the water tank 4 . The heat exchanger 3 and the water tank 4 conduct heat through the heat conductor 6 .

[0099] It should be noted that the thermal conductivity of the heat conducting element 6 is greater than the thermal conductivity of the heat exchanging element 3 , and greater than the thermal conductivity of the water tank 4 .

[0100] With the above arrangement, when the heat in the hot gas is transferred to the heat exchanger 3, the heat on the heat exchanger 3 can be transferred to the heat conductor 6. Since the heat conductor 6 has a high thermal conductivity, the heat on the heat exchanger 3 can be quickly transferred to the heat conductor 6. At the same time, the heat on the heat conductor 6 can also be quickly transferred to the water tank 4, thereby heating the water in the water tank 4.

[0101] In this way, through the setting of the heat conductor 6, the heat on the heat exchange element 3 can be quickly transferred to the water tank 4, which can reduce the heat loss in the process of transferring the heat from the heat exchange element 3 to the water tank 4, thereby improving the heat exchange effect between the water and hot air in the water tank 4, which can further improve the energy-saving effect of the dishwasher 01.

[0102] On the basis of the above, in order to improve the heat conduction effect of the heat conductor 6, in some examples, the heat conductor 6 includes a heat conducting plate. Along the thickness direction of the heat conducting plate, one side surface of the heat conducting plate is in contact with the side surface of the heat exchanger 3 close to the water tank 4, and the other side surface of the heat conducting plate is in contact with the side surface of the water tank 4 close to the heat exchanger 3.

[0103] Exemplarily, the heat conducting sheet may be a metal sheet, and the metal material may be copper, aluminum, or the like.

[0104] Illustratively, the thermally conductive sheet may be a thermally conductive silicone sheet, a thermally conductive graphite sheet, or the like.

[0105] With the above arrangement, since the thickness of the heat conducting sheet is relatively small, the heat transfer distance in the thickness direction of the heat conducting sheet is also relatively small. As a result, when the heat on the heat exchanger 3 is transferred to the water tank 4, the heat on the heat exchanger 3 can be transferred to the water tank 4 more quickly, thereby further improving the heat exchange effect between the water in the water tank 4 and the hot air.

[0106] In other embodiments, Figure 7 、 Figure 8 As shown, a first opening 34 communicating with the heat exchange cavity 31 is formed on the side of the heat exchange element 3 close to the water tank 4 , and the heat conducting element 6 is located at the first opening 34 and blocks the first opening 34 .

[0107] For example, the size of the first opening 34 may be smaller than the size of the side of the heat exchange element 3 close to the water tank 4 , that is, the first opening 34 is located in a partial area on the side of the heat exchange element 3 close to the water tank 4 .

[0108] For example, the size of the first opening 34 may also be equal to the size of the side of the heat exchange element 3 close to the water tank 4 , that is, the side of the heat exchange element 3 close to the water tank 4 forms the first opening 34 as a whole.

[0109] Through the above-mentioned arrangement, when the hot air in the cavity 11 enters the heat exchange cavity 31 through the first air inlet 32, since the heat conductor 6 blocks the first opening 34, the hot air can directly contact the heat conductor 6 located at the first opening 34, and the heat in the hot air can also be directly transferred to the heat conductor 6. In this way, there is no need to transfer the heat in the hot air to the heat conductor 6 through the heat exchanger 3.

[0110] In this way, the heat in the hot air can be transferred to the heat conductor 6 more quickly, which can reduce the heat loss in the process of transferring the heat in the hot air to the heat conductor 6, thereby improving the heat exchange effect between the water in the water tank 4 and the hot air.

[0111] In other embodiments, Figure 9 、 Figure 10 As shown, a second opening 41 communicating with the interior of the water tank 4 is opened on the side of the water tank 4 close to the heat exchange element 3 , and the heat conducting element 6 is located at the second opening 41 and blocks the second opening 41 .

[0112] Exemplarily, the size of the second opening 41 may be smaller than the size of the side of the water tank 4 close to the heat exchanger 3 , that is, the second opening 41 is located in a partial area on the side of the water tank 4 close to the heat exchanger 3 .

[0113] For example, the size of the first opening 34 may also be equal to the size of the side of the water tank 4 close to the heat exchange element 3 , that is, the side of the water tank 4 close to the heat exchange element 3 integrally forms the first opening 34 .

[0114] Through the above arrangement, when the heat in the hot air is transferred to the heat conductor 6, since the heat conductor 6 blocks the second opening 41, the heat conductor 6 can directly contact the water in the water tank 4. In this way, the heat on the heat conductor 6 can be directly transferred to the water in the water tank 4. In this way, there is no need to transfer the heat on the heat conductor 6 to the water in the water tank 4 through the water tank 4.

[0115] In this way, the heat on the heat conductor 6 can be transferred to the water in the water tank 4 more quickly, which can reduce the heat loss in the process of transferring the heat from the heat conductor 6 to the water in the water tank 4, thereby improving the heat exchange effect between the water and hot air in the water tank 4.

[0116] In some embodiments, a fan is provided in the heat exchange chamber 31. The rotation of the fan drives the flow of the medium in the chamber 11 and the heat exchange chamber 31, thereby achieving a circulation flow of the hot air in the chamber 11 between the chamber 11 and the heat exchange chamber 31, thereby achieving heat exchange between the water in the water tank 4 and the hot air in the heat exchange chamber 31.

[0117] In other embodiments, Figure 11 、 Figure 12 As shown, the heat exchange chamber 31 includes an air inlet chamber 311 and an air outlet chamber 312, which are isolated from each other. The first air inlet 32 is connected to the air inlet chamber 311, and the first air outlet 33 is connected to the air outlet chamber 312. The heat exchange element 3 also has a second air outlet 36 connected to the air inlet chamber 311 and a second air inlet 35 connected to the air outlet chamber 312.

[0118] The dishwasher 01 further includes a connecting piece 7 . The connecting piece 7 is connected to the housing and defines a connecting passage. The connecting passage connects the second air inlet 35 and the second air outlet 36 .

[0119] Specifically, if Figure 12 As shown, the connecting member 7 includes a chassis 71, an air inlet duct 72, and an air outlet duct 73. A ventilation cavity is formed within the chassis 71, and a fan is disposed within the ventilation cavity and connected to the chassis 71. One end of the air inlet duct 72 communicates with the second air outlet 36, and the other end of the air inlet duct 72 communicates with the ventilation cavity. One end of the air outlet duct 73 communicates with the second air inlet 35, and the other end of the air outlet duct 73 communicates with the ventilation cavity. The air inlet duct 72, the ventilation cavity, and the air outlet duct 73 are sequentially connected to form a connecting channel.

[0120] Through the above arrangement, after the hot air enters the air inlet chamber 311, since one end of the air inlet duct 72 is connected to the second air outlet 36 and the other end of the air inlet duct 72 is connected to the ventilation chamber, the hot air in the air inlet chamber 311 can enter the ventilation chamber through the air inlet duct 72.

[0121] Moreover, since one end of the air outlet duct 73 is connected to the second air inlet 35 and the other end of the air outlet duct 73 is connected to the ventilation cavity, the hot air can continue to flow toward the air outlet cavity 312 through the air outlet duct 73 after entering the ventilation cavity and flow into the air outlet cavity 312.

[0122] In this way, after the hot air in the cavity 11 enters the air inlet cavity 311, it can flow through the air inlet cavity 311, the air inlet duct 72, the ventilation cavity, the air outlet duct 73 and the air outlet cavity 312 in sequence, and finally flow back into the cavity 11, thereby ensuring that the hot air can circulate between the cavity 11 and the heat exchange cavity 31.

[0123] The dishwasher 01 further includes a blower, which is disposed in the communication passage and fixed to the communication member 7 , and is used to transport the hot air in the air inlet chamber 311 to the air outlet chamber 312 .

[0124] Through the above settings, when the dishwasher 01 completes the cleaning of the dishes, the fan can be started so that the fan draws the medium in the air inlet chamber 311 into the connecting channel from the second air inlet 35, and blows the medium in the connecting channel into the air outlet chamber 312 through the second air outlet 36.

[0125] In this way, since the cavity 11 is connected to the air inlet cavity 311 through the first air inlet 32, and is connected to the air outlet cavity 312 through the first air outlet 33, under the action of the fan, the hot air in the cavity 11 can flow through the air inlet cavity 311, the connecting channel and the air outlet cavity 312 in sequence, and flow back to the cavity 11, thereby realizing the circulation of the hot air in the cavity 11 between the cavity 11 and the heat exchange cavity 31, thereby realizing the heat exchange between the water in the water tank 4 and the hot air in the heat exchange cavity 31.

[0126] Furthermore, since the fan is disposed in the connecting channel, the hot air can flow more smoothly in the air inlet chamber 311 and the air outlet chamber 312 , that is, in the heat exchange chamber 31 , thereby being able to more fully exchange heat with the water in the water tank 4 .

[0127] Based on the above, in some embodiments, the volume of the air inlet cavity 311 is greater than the volume of the air outlet cavity 312 .

[0128] In this way, when the dishwasher 01 completes the cleaning of the dishes, since the volume of the air inlet chamber 311 is larger than the volume of the air outlet chamber 312, the hot air in the cavity 11 can enter the air inlet chamber 311 in large quantities and directly exchange heat with the water in the water tank 4. This can reduce the heat loss in the process of hot air flowing between the air inlet chamber 311 and the heat exchange chamber 31, thereby improving the water tank 4's recovery effect on the hot air in the cavity 11, so as to reduce the waste of heat in the hot air.

[0129] In other embodiments, the area of the wall of the air inlet cavity 311 close to the water tank 4 is larger than the area of the wall of the air outlet cavity 312 close to the water tank 4 .

[0130] In this way, when the dishwasher 01 completes the cleaning of the dishes, when the hot air flows in the air inlet chamber 311, since the area of the wall of the air inlet chamber 311 close to the water tank 4 is larger than the area of the wall of the air outlet chamber 312 close to the water tank 4, most of the hot air can complete the heat exchange with the water in the water tank 4 in the air inlet chamber 311, thereby reducing the heat loss in the process of hot air flowing between the air inlet chamber 311 and the heat exchange chamber 31, thereby improving the water tank 4's recovery effect on the hot air in the cavity 11 and reducing the waste of heat in the hot air.

[0131] In some embodiments, as Figure 13 As shown, the heat exchange element 3 is connected to the inner tank 1 in the first direction ( Figure 13 The water tank 4 is connected to the surface of the heat exchange element 3 on the side away from the inner pot 1. The first direction is perpendicular to the arrangement direction of the inner pot 1 and the base 2;

[0132] In this way, the inner tank 1, the heat exchange element 3 and the water tank 4 are arranged in sequence, so that the shapes of the heat exchange element 3 and the water tank 4 can be set to match the side wall of the inner tank 1 close to the heat exchange element 3. On the premise of ensuring the heat exchange effect of the heat exchange element 3 and the water tank 4, the size of the heat exchange element 3 and the water tank 4 can be set smaller along the first direction, thereby reducing the space of the accommodating cavity occupied by the heat exchange element 3 and the water tank 4, thereby improving the utilization rate of the space in the accommodating cavity.

[0133] In some embodiments, as Figure 14 As shown, the connecting piece 7 and the fan are connected to the base 2. The connecting piece 7 and the fan are supported by the base 2 so that the connecting piece 7 and the fan can be stably arranged in the accommodating cavity.

[0134] In some examples, such as Figure 15 、 Figure 16 As shown, the heat exchange element 3 includes a first sub-plate 301 , a second sub-plate 302 , a third sub-plate 303 , a fourth sub-plate 304 , a cover plate 305 , a first partition plate 306 and a second partition plate 307 .

[0135] like Figure 17 As shown, the cover plate 305 is located between the inner container 1 and the heat conducting member 6. The cover plate 305 is spaced apart from the inner container 1 and contacts the heat conducting member 6. The first sub-plate 301, the second sub-plate 302, the third sub-plate 303, the fourth sub-plate 304, the first partition plate 306, and the second partition plate 307 are all connected between the inner container 1 and the cover plate 305.

[0136] The thickness direction of the first partition 306 is aligned with the arrangement direction of the inner container 1 and the base 2, and the thickness direction of the second partition 307 is aligned with the second direction. The end of the first partition 306 closest to the second partition 307 is connected to the end of the second partition 307 closest to the first partition 306. The second direction is perpendicular to the first direction and also perpendicular to the arrangement direction of the inner container 1 and the base 2.

[0137] The thickness direction of the first sub-plate 301 aligns with the arrangement direction of the inner liner 1 and base 2, and is connected to the side of the second partition 307 closest to the base 2. Along the arrangement direction of the inner liner 1 and base 2, the second sub-plate 302 is positioned opposite the first sub-plate 301 and located on the side of the first sub-plate 301 away from the base 2. The third sub-plate 303 is connected between the first sub-plate 301 and the second sub-plate 302. Along the second direction, the third sub-plate 303 is located on the side of the second partition 307 away from the first partition 306. The fourth sub-plate 304 is connected to the side of the first sub-plate 301 away from the third sub-plate 303 and is positioned opposite the third sub-plate 303. The side of the fourth sub-plate 304 closest to the third sub-plate 303 is connected to the first partition 306.

[0138] The first sub-plate 301 includes a first plate segment and a second plate segment. The first plate segment is located on a side of the second partition plate 307 close to the third sub-plate 303 and is connected to both the second partition plate 307 and the third sub-plate 303. The second plate segment is located on a side of the second partition plate 307 close to the fourth sub-plate 304 and is connected to both the second partition plate 307 and the fourth sub-plate 304.

[0139] The fourth sub-plate 304 includes a third plate segment and a fourth plate segment. The third plate segment is located on the side of the first partition plate 306 close to the first sub-plate 301 and is connected to both the first partition plate 306 and the first sub-plate 301. The fourth plate segment is located on the side of the first partition plate 306 close to the second sub-plate 302 and is connected to both the first partition plate 306 and the second sub-plate 302.

[0140] The first plate segment, the third sub-plate 303, the second sub-plate 302, the fourth plate segment, the first partition plate 306, and the second partition plate 307 are sequentially connected to form a first cavity M. The second partition plate 307, the first partition plate 306, the third plate segment, and the second plate segment are sequentially connected to form a second cavity N.

[0141] The first air inlet 32 and the first air outlet 33 are both provided on a side wall of the inner container 1 close to the cover plate 305 .

[0142] For example, Figure 16 As shown, the first air outlet 33 is communicated with the first cavity M, which is the air outlet cavity 312 , and the first air inlet 32 is communicated with the second cavity N, which is the air inlet cavity 311 .

[0143] For example, Figure 18As shown, the first air inlet 32 is communicated with the first cavity M, which is the air inlet cavity 311 , and the first air outlet 33 is communicated with the second cavity N, which is the air outlet cavity 312 .

[0144] In some examples, such as Figure 19 、 Figure 20 As shown, the drainage pipe 5 is connected to the side wall of the air inlet chamber 311 close to the base 2. The condensed water generated in the air inlet chamber 311 is discharged to the outside of the heat exchange chamber 31 through the drainage pipe 5, which can prevent excessive accumulation of condensed water in the heat exchange chamber 31. Then, the condensed water enters the ventilation chamber through the air inlet pipe 72, thereby preventing the condensed water from affecting the fan and ensuring the normal function of the fan.

[0145] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0146] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

[0147] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A dishwasher, characterized in that: include: a housing, wherein a receiving cavity is formed in the housing; An inner liner is disposed in the accommodating cavity, and the inner liner forms a cavity; A heat exchange element, the heat exchange element being connected to the inner tank, the heat exchange element forming a heat exchange cavity and a first air inlet and a first air outlet communicating with the heat exchange cavity, the first air inlet and the first air outlet communicating with the cavity; the heat exchange cavity comprising an air inlet cavity and an air outlet cavity isolated from each other, the first air inlet communicating with the air inlet cavity, and the first air outlet communicating with the air outlet cavity; the heat exchange element further forming a second air outlet communicating with the air inlet cavity, and a second air inlet communicating with the air outlet cavity; a connecting member connected to the housing, wherein the connecting member forms a connecting passage, the connecting passage connecting the second air inlet and the second air outlet; a fan, disposed in the communicating passage and fixed to the communicating member, for conveying the hot air in the air inlet cavity to the air outlet cavity; a water tank disposed in the accommodating cavity and located outside the heat exchange cavity, the water tank being connected to the heat exchange element and being in thermal communication with the heat exchange element; The hot air in the cavity can circulate between the cavity and the heat exchange cavity through the first air inlet and the first air outlet, so that the hot air in the cavity exchanges heat with the water in the water tank.

2. The dishwasher according to claim 1, characterized in that The dishwasher further includes a heat conducting member connected between the heat exchange member and the water tank, and the heat exchange member and the water tank conduct heat through the heat conducting member.

3. The dishwasher according to claim 2, characterized in that The heat conducting member includes a heat conducting plate. Along the thickness direction of the heat conducting plate, one side surface of the heat conducting plate is in contact with the side surface of the heat exchange member close to the water tank, and the other side surface of the heat conducting plate is in contact with the side surface of the water tank close to the heat exchange member.

4. The dishwasher according to claim 2 or 3, characterized in that A first opening communicating with the heat exchange cavity is formed on a side of the heat exchange element close to the water tank, and the heat conducting element is located at the first opening and blocks the first opening; And / or, a second opening communicating with the interior of the water tank is opened on a side of the water tank close to the heat exchange element, and the heat conductive element is located at the second opening and blocks the second opening.

5. The dishwasher according to claim 1, wherein: The volume of the air inlet cavity is greater than the volume of the air outlet cavity; And / or, the area of the wall of the air inlet cavity close to the water tank is larger than the area of the wall of the air outlet cavity close to the water tank.

6. The dishwasher according to claim 1, characterized in that The connecting piece includes: a chassis, wherein a ventilation cavity is formed in the chassis, and the fan is disposed in the ventilation cavity and connected to the chassis; an air inlet duct, one end of the air inlet duct being in communication with the second air outlet, and the other end of the air inlet duct being in communication with the ventilation cavity; an air outlet duct, one end of the air outlet duct being connected to the second air inlet, and the other end of the air outlet duct being connected to the ventilation cavity; The air inlet duct, the ventilation cavity and the air outlet duct are connected in sequence to form the communication channel.

7. The dishwasher according to claim 1, characterized in that The housing comprises: a housing, wherein the accommodating cavity is formed in the housing; a base disposed in the accommodating cavity and connected to the outer shell, wherein the liner is disposed on the base and connected to at least one of the base and the outer shell; The heat exchange element is connected to an outer wall surface of the inner pot in a first direction, and the water tank is connected to a surface of the heat exchange element on a side away from the inner pot; the first direction is perpendicular to the arrangement direction of the inner pot and the base; And / or, the connecting piece and the fan are connected to the base.

8. The dishwasher according to any one of claims 1 to 3, characterized in that The dishwasher further includes a drainage pipe, a water inlet end of the drainage pipe being connected to the heat exchange chamber, and a water outlet end of the drainage pipe being connected to the outside of the heat exchange chamber, for discharging condensed water generated in the heat exchange chamber to the outside of the heat exchange chamber.

9. A dishwasher, characterized in that: include: a housing, wherein a receiving cavity is formed in the housing; An inner liner is disposed in the accommodating cavity, and the inner liner forms a cavity; A heat exchange element, the heat exchange element being connected to the inner tank, the heat exchange element forming a heat exchange cavity and a first air inlet and a first air outlet communicating with the heat exchange cavity, the first air inlet and the first air outlet both being communicated with the cavity; the heat exchange cavity comprising an air inlet cavity and an air outlet cavity isolated from each other, the first air inlet being communicated with the air inlet cavity, and the first air outlet being communicated with the air outlet cavity; the heat exchange element further forming a second air outlet communicating with the air inlet cavity, and a second air inlet communicating with the air outlet cavity; a connecting member connected to the housing, wherein the connecting member forms a connecting passage, the connecting passage connecting the second air inlet and the second air outlet; a fan, disposed in the communicating passage and fixed to the communicating member, for conveying the hot air in the air inlet cavity to the air outlet cavity; a water tank connected to the heat exchange element and in thermal communication with the heat exchange element; The hot air in the cavity can circulate between the cavity and the heat exchange cavity through the first air inlet and the first air outlet, so that the hot air in the cavity exchanges heat with the water in the water tank.