Dishwasher

Abstract

The utility model discloses a dish-washing machine, and relates to the technical field of dish-washing machines, the dish-washing machine comprises a dish-washing machine main body and a heat pump system, the dish-washing machine main body is provided with a washing chamber, an internal circulation air duct and a spraying system; the heat pump system comprises a compression device, a first heat exchange device, a second heat exchange device, an air cooling device and an air heating device. The first heat exchange device is provided with a first heat exchange channel and a second heat exchange channel which exchange heat with each other. The compression device, a first heat exchange channel of the first heat exchange device, the air heating device, the air cooling device and the second heat exchange device are sequentially communicated and form a circulation heat exchange loop. According to the technical scheme, the compression device, the first heat exchange channel, the air heating device, the air cooling device and the second heat exchange device are sequentially communicated to form the circulating heat exchange loop, so that the circulating heat exchange loop of the dish washing machine can have washing and drying modes or stages at the same time without other switching devices; the pipeline structure of the dish-washing machine is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, and particularly relates to a dishwasher. Background Art

[0002] After the dishwashing of the dishwasher is completed, there may be residual heat and water vapor on the tableware. If it cannot be dried in time, these water vapors may cause bacteria and molds to grow on the tableware. Therefore, it is necessary to enter the drying mode. However, in the related art, in order to have both washing and drying modes or stages in the existing heat pump type dishwasher and to be able to switch between the washing and drying modes or stages, usually multiple control valves need to be added, which results in a relatively complex pipeline structure of the heat pump system of the dishwasher. Summary of the Utility Model

[0003] The main object of the utility model is to propose a dishwasher, aiming to simplify the pipeline structure of the heat pump system of the dishwasher.

[0004] To achieve the above object, the dishwasher proposed by the utility model includes a dishwasher main body having a washing chamber, an internal circulation air duct and a spraying system. The internal circulation air duct has an air inlet and an air outlet, and both the air inlet and the air outlet are communicated with the washing chamber; the spraying system is used to spray washing water into the washing chamber to wash the tableware placed in the washing chamber; and

[0005] A heat pump system, including a compression device, a first heat exchange device, a second heat exchange device, an air cooling device and an air heating device. The first heat exchange device has a first heat exchange channel and a second heat exchange channel which are arranged for heat exchange with each other; the compression device, the first heat exchange channel of the first heat exchange device, the air heating device, the air cooling device and the second heat exchange device are sequentially communicated to form a circulating heat exchange loop;

[0006] The second heat exchange channel is communicated with the spraying system, and the media in the first heat exchange channel and the second heat exchange channel exchange heat with each other to produce hot water for the spraying system;

[0007] The air cooling device and the air heating device are sequentially arranged in the internal circulation air duct along the directions of the air inlet and the air outlet.

[0008] In one embodiment, the first heat exchange device includes an outer tube and an inner tube. The inner tube forms the first heat exchange channel, and the second heat exchange channel is formed between the outer tube and the inner tube; or the inner tube forms the second heat exchange channel, and the first heat exchange channel is formed between the outer tube and the inner tube.

[0009] In one embodiment, the first heat exchange device includes a box body and a first heat exchange member disposed inside the box body. The first heat exchange member defines the first heat exchange channel, and a second heat exchange channel is formed between the box body and the first heat exchange member.

[0010] In one embodiment, the heat pump system includes a first throttling device disposed on the flow path between the first heat exchange device and the second heat exchange device;

[0011] And / or, the heat pump system includes a second throttling device disposed on the flow path between the air heating device and the air cooling device.

[0012] In one embodiment, the second heat exchange device includes a second heat exchange member and a second fan for supplying air to the second heat exchange member;

[0013] The air cooling device includes a third heat exchange member and a third fan for supplying air to the third heat exchange member; and / or, the air heating device includes a fourth heat exchange member and a fourth fan for supplying air to the fourth heat exchange member;

[0014] The second heat exchange member, the third heat exchange member, and the fourth heat exchange member are all provided with heat exchange channels for the medium to flow through.

[0015] In one embodiment, the dishwasher main body includes a housing, and the housing includes an outer shell and an inner container disposed inside the outer shell. An inner circulation air duct is formed between the outer shell and the inner container. The outer shell is provided with an air outlet, and the air outlet side of the second fan is communicated with the air outlet.

[0016] In one embodiment, the housing includes a door body assembly. The outer shell is provided with a first opening, and the inner container is provided with a second opening corresponding to the first opening. The door body assembly is disposed on the outer shell to open or cover the first opening and the second opening; when the door body assembly covers the first opening and the second opening, the inner container and the door body assembly enclose the washing chamber, and the air outlet and the first opening are disposed on the same side of the outer shell.

[0017] In one embodiment, the dishwasher includes a control device configured to control the operation of the second fan during the washing stage and control the operation of the third fan and / or the fourth fan during the drying stage.

[0018] In one embodiment, the spraying system includes a water collecting tank, a water pump, and a spraying assembly; the spraying assembly is disposed in the washing chamber for spraying washing water into the washing chamber. The water collecting tank is communicated with the second heat exchange channel, and the second heat exchange channel is communicated with the spraying assembly through a pipeline. The water pump is disposed on the connecting pipeline between the second heat exchange channel and the spraying assembly.

[0019] In one embodiment, the dishwasher further includes an electric auxiliary heating device, and the electric auxiliary heating device is disposed on the flow path between the second heat exchange channel and the spraying assembly; and / or, the electric auxiliary heating device is disposed in the internal circulation air duct.

[0020] The technical solution of the present utility model forms a circulating heat exchange loop by sequentially connecting a compression device, a first heat exchange channel of a first heat exchange device, an air heating device, an air cooling device, and a second heat exchange device. In this way, the circulating heat exchange loop of the dishwasher heat pump system can have washing and drying modes or stages without other switching devices, simplifying the pipeline structure of the dishwasher heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 It is a schematic structural diagram of an embodiment of the dishwasher provided by the present utility model.

[0023] Explanation of the reference numerals in the drawings:

[0024] 10. Dishwasher;

[0025] 100. Main body;

[0026] 101. Washing chamber;

[0027] 102. Internal circulation air duct; 102a. Air inlet; 102b. Air outlet;

[0028] 110. Spraying system; 111. Water pump; 112. Spraying assembly; 113. Water collecting tank;

[0029] 200. Heat pump system;

[0030] 210. Compression device;

[0031] 230. First heat exchange device; 231. First heat exchange element; 232. Box body;

[0032] 240, Air heating device; 241, Fourth heat exchanger; 242, Fourth fan;

[0033] 250, Second heat exchange device; 251, Second heat exchanger; 252, Second fan;

[0034] 260, Air cooling device; 261, Third heat exchanger; 262, Third fan;

[0035] 270, First throttling device;

[0036] 280, Second throttling device;

[0037] 300, Electric auxiliary heating device.

[0038] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0040] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present utility model, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0042] A dishwasher is a device that automatically cleans tableware such as bowls, chopsticks, plates, dishes, knives, and forks. The fully automatic dishwashers on the market can be divided into two categories: household and commercial. Household fully automatic dishwashers are only suitable for families and mainly include cabinet type, table type, sink integrated type, and integrated type. Commercial dishwashers can be divided into 5 major categories according to their structure: cabinet type, hood type, basket conveyor type, belt conveyor type, and ultrasonic type, which reduce the labor intensity of the cooking staff in restaurants, hotels, and canteens of government agencies and institutions, improve work efficiency, and enhance cleanliness and hygiene.

[0043] The present utility model proposes a dishwasher, aiming to improve the washing and drying efficiency of the dishwasher. This dishwasher is a heat pump type dishwasher and can be used for household or commercial purposes. When used as a commercial dishwasher, the advantages are more obvious. For the convenience of understanding and description, in the attached Figure 1 of the specification of the present utility model, the solid arrow indicates space, slot or hole.

[0044] Please refer to Figure 1 , in the embodiment of the present utility model, the dishwasher 10 includes a dishwasher 10 main body 100 and a heat pump system 200. The dishwasher 10 main body 100 has a washing chamber 101, an internal circulation air duct 102, and a spraying system 110. The internal circulation air duct 102 has an air inlet 102a and an air outlet 102b, and both the air inlet 102a and the air outlet 102b are communicated with the washing chamber 101; the spraying system 110 is used to spray washing water into the washing chamber 101 to clean the tableware placed in the washing chamber 101; the heat pump system 200 includes a compression device 210, a first heat exchange device 230, a second heat exchange device 250, an air cooling device 260, and an air heating device 240. The first heat exchange device 230 has a first heat exchange channel and a second heat exchange channel arranged for heat exchange with each other; the compression device 210, the first heat exchange channel of the first heat exchange device 230, the air heating device 240, the air cooling device 260, and the second heat exchange device 250 are sequentially communicated to form a circulating heat exchange loop; the second heat exchange channel is communicated with the spraying system 110, and the media in the first heat exchange channel and the second heat exchange channel exchange heat with each other to produce hot water for the spraying system 110; the air cooling device 260 and the air heating device 240 are sequentially arranged in the internal circulation air duct 102 along the directions of the air inlet 102a and the air outlet 102b.

[0045] The technical solution of the present utility model enables the circulating heat exchange loop of the heat pump system 200 of the dishwasher 10 to have both washing and drying modes or stages without other switching devices by sequentially communicating the compression device 210, the first heat exchange channel of the first heat exchange device 230, the air heating device 240, the air cooling device 260, and the second heat exchange device 250 to form a circulating heat exchange loop, simplifying the pipeline structure of the heat pump system 200 of the dishwasher 10.

[0046] The specific structure of the dishwasher 10 will be described in detail below.

[0047] Among them, the main body 100 of the dishwasher 10 generally includes a housing and a spraying system 110. The housing defines a washing chamber 101 and an internal circulation air duct 102. The washing chamber 101 is used for placing tableware. The housing generally includes an outer shell, an inner liner and a door assembly. The outer shell is provided with a first opening, and the inner liner is provided with a second opening corresponding to the position of the first opening. The door assembly is arranged on the outer shell to open or cover the first opening and the second opening. When the door assembly covers the first opening and the second opening, the inner liner and the door assembly enclose to form the washing chamber 101, and the internal circulation air duct 102 is formed between the outer shell and the inner liner. The internal circulation air duct 102 has an air inlet 102a and an air outlet 102b, and both the air inlet 102a and the air outlet 102b are communicated with the washing chamber 101. In some embodiments, the door assembly and the inner liner of the dishwasher 10 may be integrated together.

[0048] Regarding the spraying system 110, the spraying system 110 is used to spray washing water into the washing chamber 101 to clean the tableware placed in the washing chamber 101. The spraying system 110 generally includes a water pump 111, a spraying assembly 112, a water pipe and a pipeline system, a controller of the spraying system 110, a filter, a water level sensor and a drainage device.

[0049] Regarding the spraying system 110, the spraying system 110 includes a water collecting tank 113, a water pump 111 and a spraying assembly 112. The spraying assembly 112 is arranged in the washing chamber 101 for spraying washing water into the washing chamber 101. The water collecting tank 113 is communicated with the second heat exchange channel, and the second heat exchange channel is communicated with the spraying assembly 112 through a pipeline. The water pump 112 is arranged on the connecting pipeline between the second heat exchange channel and the spraying assembly 112.

[0050] The spray system 110 generally also includes a water pipe and piping system, a spray system 110 controller, a filter, a water level sensor, and a drainage device. Among them, the water pump 111 is one of the key components of the spray system 110 of the dishwasher 10, responsible for transporting the cleaning agent and water from the storage box 232 to the spray arm or nozzle. The water pump 111 is usually driven by an electric motor to generate sufficient water pressure and flow rate to ensure the washing effect. The spray assembly 112 is usually a spray arm or nozzle, and the spray assembly 112 is the outlet for liquid spraying in the spray system 110 of the dishwasher 10. They are usually located inside the dishwasher 10 and evenly spray the cleaning agent and water onto the surfaces of bowls, dishes, etc. by rotating or directional spraying to thoroughly clean. The water pipe and piping system are responsible for transporting water from the water pump 111 to the spray arm or nozzle and ensuring that the water flows smoothly to the target area. These pipes are usually made of corrosion-resistant materials such as stainless steel or plastic. The spray system 110 controller is used to control parameters such as the start and stop of the spray system 110, the spray time, and the spray mode. It is usually part of the electronic control panel of the dishwasher 10, and the user can set the corresponding parameters through the buttons or touch screen on the panel. The filter is used to filter impurities and residues in the washing water to prevent the nozzles or pipes of the spray system 110 from being blocked. This helps to maintain the normal operation and cleaning effect of the spray system 110. The water level sensor is used to monitor the water level inside the dishwasher 10 to ensure that the water pump 111 operates at the correct water level to prevent the water level from being too high or too low during the drying period. The drainage device is used to drain the sewage generated during the dishwashing process from the dishwasher 10 to maintain a clean environment. The drainage device usually includes components such as a drainage pipe, a drainage pump 111, and a drainage filter.

[0051] The heat pump system 200 includes a compression device 210, a first heat exchange device 230, a second heat exchange device 250, an air cooling device 260, and an air heating device 240. The first heat exchange device 230 has a first heat exchange channel and a second heat exchange channel that are arranged for heat exchange with each other; the compression device 210, the first heat exchange channel of the first heat exchange device 230, the air heating device 240, the air cooling device 260, and the second heat exchange device 250 are sequentially connected and form a circulating heat exchange loop; the second heat exchange channel is connected to the spray system 110, and the media in the first heat exchange channel and the second heat exchange channel exchange heat with each other to produce hot water for the spray system 110; the air cooling device 260 and the air heating device 240 are sequentially arranged in the internal circulation air duct 102 along the direction of the air inlet 102a and the air outlet 102b.

[0052] Regarding the compression device 210, the main function of the compression device 210 is to compress the refrigerant at low temperature and low pressure into a refrigerant at high temperature and high pressure to achieve a refrigeration cycle. Its working principle is that the compression device 210 sucks in the refrigerant through its internal reciprocating or rotating motion and compresses it to be discharged from the exhaust port. During this process, the temperature and pressure of the refrigerant will increase to achieve the refrigeration or heating effect.

[0053] Regarding the first heat exchange device 230, the first heat exchange device 230 has a first heat exchange channel and a second heat exchange channel. Among them, the first heat exchange channel is for the refrigerant that can be compressed by the compression device 210 such as the refrigerant, and the second heat exchange channel is communicated with the spray system 110.

[0054] In this embodiment, the first heat exchange device 230 can be a shell-and-tube heat exchanger, a plate heat exchanger, a spiral heat exchanger, or a spiral plate heat exchanger, etc.

[0055] Among them, the shell-and-tube heat exchanger consists of a tube bundle (inner tube) and a shell. The heat transfer medium (usually a liquid or steam) passes through the tube bundle and transfers heat to another medium (which can be a liquid, gas, or steam, and is a liquid in this embodiment), and flows through the shell around the tube bundle. At this time, it can be that the inner tube forms the first heat exchange channel, and the second heat exchange channel is formed between the inner tube and the shell, or the inner tube forms the second heat exchange channel, and the first heat exchange channel is formed between the inner tube and the shell. Preferably, the inner tube forms the first heat exchange channel, and the second heat exchange channel is formed between the inner tube and the shell.

[0056] The plate heat exchanger is composed of multiple plates, and there are gaps between the plates. Through these gaps, the first heat exchange channel and the second heat exchange channel can be formed to enable heat transfer between the two flowing media. The advantages of the plate heat exchanger include a compact design, efficient heat transfer, easy maintenance, and cleaning.

[0057] The spiral plate heat exchanger realizes efficient heat transfer through a multi-layer spiral plate structure. This heat exchanger combines the advantages of the plate heat exchanger and the shell-and-tube heat exchanger.

[0058] Regarding the spiral heat exchanger, through a spiral pipe structure, the spiral heat exchanger can effectively transfer the heat of one of the media to another medium. The above two media usually refer to the refrigerant, air, or water.

[0059] In an exemplary embodiment, the first heat exchange device 230 includes a box body 232 and a first heat exchange member 231 disposed within the box body 232. The first heat exchange channel is disposed within the first heat exchange member 231, and the second heat exchange channel is disposed within the box body 232. It should be understood that the first heat exchange member 231 constructs the first heat exchange channel, and the second heat exchange channel is formed between the box body 232 and the first heat exchange member 231. Among them, the box body 232 is used to temporarily store the washing water to be heated. When in the washing mode, the first heat exchange member 231 is located in the water and is in direct contact with the water, thereby heating the water within the box body 232. Among them, when the first heat exchange member 231 is a spiral plate heat exchanger, the heating efficiency is relatively good. The spiral plate heat exchanger is similar to the plate heat exchanger. The design of the spiral plate heat exchanger allows it to perform heat exchange operations in water. Selecting the spiral plate heat exchanger makes this embodiment have a higher heat exchange efficiency and a smaller volume.

[0060] In another exemplary embodiment, the first heat exchange device 230 includes an outer tube and an inner tube. The inner tube forms the first heat exchange channel, and the second heat exchange channel is formed between the outer tube and the inner tube; alternatively, the inner tube forms the second heat exchange channel, and the first heat exchange channel is formed between the outer tube and the inner tube.

[0061] Regarding the second heat exchange device 250, in this embodiment, the second heat exchange device 250 can be a finned heat exchanger. The finned heat exchanger has heat dissipation fins or heat dissipation pipes, and the heat is taken away from the hot medium and released into the surrounding air through a fan or natural convection. For example, the second heat exchange device 250 can be a spiral plate heat exchanger. Alternatively, the second heat exchange device 250 includes a second heat exchange member and a liquid storage device. The liquid storage device contains a cold storage liquid, and the second heat exchange member is disposed within the liquid storage device. Among them, the second heat exchange device can be partially immersed in the cold storage liquid or fully immersed in the cold storage liquid. Preferably, the second heat exchange device is fully immersed in the cold storage liquid.

[0062] Regarding the air cooling device 260 and the air heating device 240, the air cooling device 260 and the air heating device 240 are sequentially disposed along the direction of the air inlet 102a and the air outlet 102b in the internal circulation air duct 102. Thus, in the drying mode or during the drying stage, the high-temperature and high-humidity air in the dishwasher 10 enters the internal circulation air duct 102 from the air inlet 102a, then is cooled and dehumidified by the air cooling device 260, and then heated by the air heating device 240, and then blown into the washing chamber 101 from the air outlet 102b to heat and dry the tableware in the washing chamber 101.

[0063] Among them, the air cooling device 260 is mainly used to transfer the heat in the heat medium (such as water, engine oil, etc.) to the surrounding air to achieve cooling. Such a heat exchanger usually includes heat dissipation fins or heat dissipation pipes, and the heat is taken away from the heat medium by a fan or natural convection and released into the surrounding air. In this embodiment, the air cooling device 260 can also be an air spiral heat exchanger, which combines the design of a spiral heat exchanger and the function of an air heat exchanger, and exchanges heat with air through a spiral pipe structure.

[0064] In this embodiment, the air heating device 240 has the same structure as the air cooling device 260, mainly the installation positions are different, so as to realize the difference between refrigeration and heating, and will not be elaborated here.

[0065] In an exemplary embodiment, the air cooling device 260 includes a third heat exchange member 261 and a third fan 262, and the third fan 262 is used to supply air to the third heat exchange member 261; and / or, the air heating device 240 includes a fourth heat exchange member 241 and a fourth fan 242, and the fourth fan 242 is used to supply air to the fourth heat exchange member 241; the second heat exchange member 251, the third heat exchange member and the fourth heat exchange member 241 are all provided with heat exchange channels for the medium to flow through. By arranging the third fan 262 and the fourth fan 242, the heat exchange efficiency of the second heat exchange device 250 and the air heating device 240 can be improved.

[0066] It can be understood that the dishwasher 10 usually also includes a tableware rack, a sink, etc., or may also include some other auxiliary components, such as a warming box, a tableware bracket, a filter screen, etc., to ensure the normal operation of the dishwasher 10 and the convenience of maintenance, which will not be elaborated here one by one.

[0067] During the actual operation, the heat pump system 200 includes a throttling device. Among them, the functions of the throttling device are mainly as follows:

[0068] Adjust the refrigerant flow: The throttling device can throttle and depressurize the high-pressure liquid from the air heating device 240 into a low-pressure liquid, and at the same time adjust the refrigerant flow entering the evaporator, so as to ensure that the refrigerant flow in the heat pump system 200 is within a reasonable range.

[0069] Reduce the heat exchange difficulty: For example, during the heat exchange process, the throttling device will make the refrigerant liquid flow through a small hole, forming a local contraction, so that the flow rate increases and the static pressure decreases. This pressure difference will make the refrigerant evaporate more easily in the evaporator, reduce the heat exchange difficulty, and improve the heat exchange efficiency.

[0070] Achieve temperature control: This throttling device can also be an important part of temperature control. When the system requires a colder temperature, the throttling device can be used to reduce the refrigerant flow rate, thereby lowering the evaporation temperature. Conversely, when the system requires a warmer temperature, the throttling device can be used to increase the refrigerant flow rate, thereby raising the evaporation temperature.

[0071] In one embodiment, to facilitate temperature control during the washing stage and reduce the heat exchange difficulty during the washing stage, the first heat exchange device 230 includes an outer tube and an inner tube. The inner tube forms a first heat exchange channel, and a second heat exchange channel is formed between the outer tube and the inner tube; alternatively, the inner tube forms a second heat exchange channel, and a first heat exchange channel is formed between the outer tube and the inner tube.

[0072] In another embodiment, to facilitate temperature control during the drying stage and reduce the heat exchange difficulty during the washing stage, the first heat exchange device 230 includes a box body 232 and a first heat exchange member 231 disposed inside the box body 232. The first heat exchange channel is disposed in the first heat exchange member 231, and the second heat exchange channel is disposed in the box body 232.

[0073] In one embodiment, the second heat exchange device 250 includes a second heat exchange member 251 and a second blower 252. The second blower 252 is used to supply air to the second heat exchange member 251; that is to say, the second heat exchange device 250 is a finned heat exchanger, and the finned heat exchanger has a high heat exchange efficiency in the scenario of heat exchange with air. Of course, in other embodiments, the second heat exchange device 250 can also be other types of heat exchangers.

[0074] In another embodiment, the air cooling device 260 includes a third heat exchange member and a third blower 262. The third blower 262 is used to supply air to the third heat exchange member. That is to say, the air cooling device 260 is a finned heat exchanger, and the finned heat exchanger has a high heat exchange efficiency in the scenario of heat exchange with air. Of course, in other embodiments, the air cooling device 260 can also be other types of heat exchangers.

[0075] In yet another embodiment, the air cooling device 260 includes a fourth heat exchange member 241 and a fourth blower 242. The fourth blower 242 is used to supply air to the fourth heat exchange member 241. That is to say, the air cooling device 260 is a finned heat exchanger, and the finned heat exchanger has a high heat exchange efficiency in the scenario of heat exchange with air. Of course, in other embodiments, the air cooling device 260 can also be other types of heat exchangers.

[0076] Among them, the above-mentioned second heat exchange member 251, the third heat exchange member, and the fourth heat exchange member 241 are all provided with heat exchange channels for the medium to flow through.

[0077] In one embodiment, the main body 100 of the dishwasher 10 includes a housing, which includes an outer shell, a door assembly, an inner container with an opening on one side, and a water collecting tank disposed below the inner container; the door assembly is rotatably disposed on the outer shell for opening or covering the opening; when the door assembly covers the opening, the inner container, the water collecting tank and the door assembly enclose to form the washing chamber 101, and an inner circulation air duct 102 is formed between the outer shell and the inner container.

[0078] Based on the previous embodiment, in order to improve the heat exchange efficiency of the second heat exchange device 250, the second heat exchange device 250 includes a second heat exchange member 251 and a second fan 252, and the second fan 251 is used to supply air to the second heat exchange member 252.

[0079] In order to further improve the heat exchange efficiency of the second heat exchange device 250, the outer shell is provided with an air outlet, and the air outlet side of the second fan 252 is communicated with the air outlet. Thus, through the setting of the air outlet, the second heat exchange device 250 can exchange heat with the air outside the dishwasher 10, thereby improving the heat exchange efficiency of the second heat exchange device 250.

[0080] In addition, in order to make the exhaust air smoother, the air outlet and the first opening are disposed on the same side of the outer shell. That is, the air outlet is disposed on the front side (the side facing the user). In this way, it is avoided that the air outlet is blocked or the air flow is intercepted when the dishwasher 10 is placed against the wall, thereby making the exhaust air smoother.

[0081] In other embodiments, the second heat exchange device 250 may also be disposed outside the housing of the dishwasher 10.

[0082] In some embodiments, the air inlet 102a of the inner circulation air duct 102 is disposed at the upper part of the inner container, and the air outlet 102b of the inner circulation air duct 102 is disposed at the lower part of the inner container. Among them, the median line of the height of the inner container can be used as a standard. The upper part is above the median line, and the lower part is below the median line. Among them, the air inlet 102a and the air outlet 102b of the inner circulation air duct 102 can be disposed on the same side surface of the inner container.

[0083] Taking the inner container as an example of the direction, the air inlet 102a and the air outlet 102b of the inner circulation air duct 102 can be disposed on the left side surface, the right side surface or the rear side surface of the inner container. At this time, the air cooling device 260 and the air heating device 240 can also be disposed on the same side surface of the inner container, on the left side surface, the right side surface or the rear side surface of the inner container.

[0084] In another embodiment, the air cooling device 260 and the air heating device 240 are disposed below the inner container.

[0085] In one embodiment, the dishwasher 10 further includes an electric auxiliary heating device 300. In this embodiment, the electric auxiliary heating device 300 is an auxiliary heating device that uses electric energy as an energy source. It converts electric energy into heat energy and provides additional heat when the main heat pump system 200 cannot meet the demand or additional heating is required.

[0086] Wherein, the electric auxiliary heating device 300 is arranged on the flow path between the second heat exchange channel of the first heat exchange device 220 and the spraying assembly 112. In this way, during the washing stage, when the heat pump system 200 cannot meet the demand, the electric auxiliary heating device 300 can be started. Secondly, the electric auxiliary heating device 300 can also be arranged in the internal circulation air duct 102. In this way, during the drying stage, when the heat pump system 200 cannot meet the demand, the electric auxiliary heating device 300 can also be started. It can be understood that electric auxiliary heating devices 300 are arranged on the flow paths between the internal circulation air duct 102, the box body 232 and the spraying assembly 112, or there is one electric auxiliary heating device 300 that can be heated correspondingly during both the washing stage and the drying stage.

[0087] Exemplarily, the electric auxiliary heating device 300 generally includes an electric heating element, a control element and a protection element.

[0088] The heating element is usually an electric heating wire, an electric heating tube or an electric heating plate, which is a key component for converting electric energy into heat energy. The control element is used to control the heating power and working state of the electric heating element and generally includes a temperature sensor and a temperature controller. The temperature controller is usually integrated with other control elements into a control device. The protection element is used to ensure the safe operation of the electric auxiliary heating device 300, prevent overheating or circuit failures, and generally includes an overheat protector and a leakage protector.

[0089] When the heat pump system 200 needs additional heating, the control device receives the signal and causes the electric heating element to heat. The electric heating element generates heat energy under the action of current and transfers the heat energy to the surrounding fluid (usually water or air). The temperature sensor monitors the fluid temperature and feeds back information to the control device. The control element adjusts the heating power of the electric heating element according to the feedback information of the temperature sensor to keep the fluid temperature within the set range. If the temperature is too high or a failure occurs, the protection device will automatically cut off the power supply to ensure safe operation.

[0090] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural transformations made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dishwasher, characterized in that: include; A dishwasher body, comprising a washing chamber, an inner circulation air duct and a spray system, wherein the inner circulation air duct has an air inlet and an air outlet, wherein both the air inlet and the air outlet are connected to the washing chamber; the spray system is used to spray washing water into the washing chamber to wash the dishes placed in the washing chamber; and A heat pump system, comprising a compression device, a first heat exchange device, a second heat exchange device, an air cooling device and an air heating device, wherein the first heat exchange device has a first heat exchange channel and a second heat exchange channel arranged for heat exchange with each other; the compression device, the first heat exchange channel of the first heat exchange device, the air heating device, the air cooling device and the second heat exchange device are connected in sequence to form a circulating heat exchange loop; The second heat exchange channel is connected to the spray system, and the media in the first heat exchange channel and the second heat exchange channel exchange heat with each other to produce hot water for the spray system; The air cooling device and the air heating device are sequentially arranged in the inner circulation air duct along the direction of the air inlet and the air outlet.

2. The dishwasher according to claim 1, characterized in that The first heat exchange device includes an outer tube and an inner tube, the inner tube forms a first heat exchange channel, and a second heat exchange channel is formed between the outer tube and the inner tube; or, the inner tube forms a second heat exchange channel, and a first heat exchange channel is formed between the outer tube and the inner tube.

3. The dishwasher according to claim 1, characterized in that The first heat exchange device comprises a box body and a first heat exchange element arranged in the box body. The first heat exchange member forms the first heat exchange channel, and the second heat exchange channel is formed between the box body and the first heat exchange member.

4. The dishwasher according to any one of claims 1 to 3, characterized in that: The heat pump system comprises a first throttling device, which is arranged on a flow path between the first heat exchange device and the second heat exchange device; And / or, the heat pump system includes a second throttling device, which is arranged on the flow path between the air heating device and the air cooling device.

5. The dishwasher according to claim 4, characterized in that The second heat exchange device comprises a second heat exchange element and a second fan, wherein the second fan is used to supply air to the second heat exchange element; The air cooling device comprises a third heat exchange element and a third fan, wherein the third fan is used to supply air to the third heat exchange element; and / or the air heating device comprises a fourth heat exchange element and a fourth fan, wherein the fourth fan is used to supply air to the fourth heat exchange element; The second heat exchange element, the third heat exchange element and the fourth heat exchange element are all provided with heat exchange channels for medium circulation.

6. The dishwasher according to claim 5, characterized in that The dishwasher body includes a shell, which includes an outer shell and an inner tank arranged on the outer shell, the inner circulation air duct is formed between the outer shell and the inner tank, the outer shell is provided with an exhaust port, and the air outlet side of the second fan is connected to the exhaust port.

7. The dishwasher according to claim 6, characterized in that The shell includes a door body assembly, the outer shell is provided with a first opening, the inner tank is provided with a second opening at a position corresponding to the first opening, and the door body assembly is arranged on the outer shell to open or cover the first opening and the second opening; when the door body assembly covers the first opening and the second opening, the inner tank and the door body assembly enclose the washing chamber, and the exhaust port and the first opening are arranged on the same side of the outer shell.

8. The dishwasher according to claim 5, characterized in that The dishwasher comprises a control device for controlling the operation of the second fan, the third fan and the fourth fan.

9. The dishwasher according to claim 6, characterized in that The spray system includes a water collection tank, a water pump and a spray assembly; The spray assembly is arranged in the washing chamber, and is used for spraying washing water into the washing chamber. The water collection tank is connected with the second heat exchange channel, and the second heat exchange channel is connected with the spray assembly through a pipeline. The water pump is arranged on the connecting pipeline between the second heat exchange channel and the spray assembly.

10. The dishwasher according to claim 9, characterized in that The dishwasher further comprises an electric auxiliary heating device, which is arranged on a flow path between the second heat exchange channel of the second heat exchange device and the spray assembly; And / or, the electric auxiliary heating device is arranged in the internal circulation air duct.

Images