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, and an air inlet and an air outlet of the internal circulation air duct are both communicated with the washing chamber; the heat pump system comprises a compression device, a switching device, a first heat exchange device, a second heat exchange device, an air cooling device and an air heating device. The compression device, a first heat exchange channel of the first heat exchange device and the second heat exchange device form a first circulation heat exchange loop through the switching device, and the compression device, the air heating device and the air cooling device form a second circulation heat exchange loop through the switching device. The air cooling device and the air heating device are sequentially arranged in the inner circulation air duct in the direction of the air inlet and the air outlet. According to the technical scheme, independent heat exchange parts are used in the washing stage and the drying stage of the dish washing machine, and the washing and drying efficiency, flexibility and energy utilization rate of the dish washing machine can be improved.

Description

Technical Field

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

[0002] A dishwasher, such as a heat pump type dishwasher, usually has two modes or stages: washing and drying. After the washing is completed, the inside of the dishwasher is filled with wet air with high relative humidity and high temperature and liquid water droplets attached to the surface of the tableware. Therefore, it is necessary to enter the drying mode. However, in the related art, the heat pump type dishwasher has problems of low washing and drying efficiency. Summary of the Utility Model

[0003] The main object of the utility model is to provide a dishwasher, aiming to improve the washing and drying efficiency of the dishwasher.

[0004] To achieve the above object, the dishwasher proposed by the utility model includes:

[0005] A dishwasher main body having a washing chamber, an internal circulation air duct and a spraying system, the internal circulation air duct having an air inlet and an air outlet, both the air inlet and the air outlet being communicated with the washing chamber; the spraying system for spraying washing water into the washing chamber to wash the tableware placed in the washing chamber;

[0006] A heat pump system including a compression device, a switching 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 having a first heat exchange channel and a second heat exchange channel arranged for heat exchange with each other; the compression device forming a first circulating heat exchange loop with the first heat exchange channel and the second heat exchange device through the switching device, and the compression device forming a second circulating heat exchange loop with the air heating device and the air cooling device through the switching device;

[0007] The second heat exchange channel is communicated with the spraying system;

[0008] 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;

[0009] The switching device is used to control the refrigerant discharged from the compression device to pass through the first circulating heat exchange loop, so that 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, and is also used to control the refrigerant discharged from the compression device to pass through the second circulating heat exchange loop.

[0010] In one embodiment, the first heat exchange device includes a box body and a first heat exchange member arranged in the box body; the first heat exchange member constructs the first heat exchange channel, and the second heat exchange channel is formed between the box body and the first heat exchange member.

[0011] In one embodiment, the switching device includes a first interface, a second interface and a third interface, the first interface is used to communicate with the exhaust port of the compression device; the second interface is used to communicate with the first heat exchange channel of the first heat exchange device, and the third interface is used to communicate with the air heating device;

[0012] The first interface, the second interface and the third interface have a first connected state and a second connected state; in the first connected state, the first interface is connected to the second interface, and the first interface is isolated from the third interface; in the second connected state, the first interface is connected to the third interface, and the first interface is isolated from the second interface.

[0013] In one embodiment, the heat pump system includes a first throttling device, which is arranged on a flow path between the first heat exchange device and the second heat exchange device;

[0014] 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.

[0015] In one embodiment, the second heat exchange device comprises a second heat exchange element and a second fan, and the second fan is used to supply air to the second heat exchange element;

[0016] 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;

[0017] Wherein, 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.

[0018] In one embodiment, the dishwasher body includes a shell, the shell 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.

[0019] In one embodiment, the shell includes a door body, 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 is provided on the outer shell to open or cover the first opening and the second opening; when the door body covers the first opening and the second opening, the inner tank and the door body enclose the washing chamber, and the exhaust port and the first opening are provided on the same side of the outer shell.

[0020] In one embodiment, the air inlet of the inner circulation air duct is arranged at the upper part of the inner tank, and the air outlet of the inner circulation air duct is arranged at the lower part of the inner tank.

[0021] In one embodiment, the spraying system includes a water collecting tank, a water pump and a spraying assembly;

[0022] The spraying assembly is arranged 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 arranged on the connecting pipeline between the second heat exchange channel and the spraying assembly.

[0023] In one embodiment, the dishwasher further includes an electric auxiliary heating device, and the electric auxiliary heating device is arranged on the flow path between the second heat exchange channel of the second heat exchange device and the spraying assembly; and / or, the electric auxiliary heating device is arranged in the inner circulation air duct.

[0024] The technical solution of the present utility model improves the washing, drying efficiency, flexibility and energy utilization rate of the dishwasher by using independent heat exchange components for the washing stage and the drying stage of the dishwasher respectively. This design not only provides a better dishwashing experience, but also helps to save energy and reduce maintenance costs. Description of the Drawings

[0025] 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 drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of an embodiment of the dishwasher provided by the present utility model;

[0027] Explanation of the reference numerals in the drawings:

[0028] 10. Dishwasher;

[0029] 100. Main body;

[0030] 101. Washing chamber;

[0031] 102. Inner circulation air duct; 102a. Air inlet; 102b. Air outlet;

[0032] 110. Spraying system; 111. Water pump; 112. Spraying assembly;

[0033] 200. Heat pump system;

[0034] 210. Compression device;

[0035] 220. Switching device;

[0036] 230. First heat exchange device; 231. First heat exchange element; 232. Box body;

[0037] 240. Air heating device; 241. Fourth heat exchange element; 242. Fourth fan;

[0038] 250. Second heat exchange device; 251. Second heat exchange element; 252. Second fan;

[0039] 260. Air cooling device; 261. Third heat exchange element; 262. Third fan;

[0040] 270. First throttling device;

[0041] 280. Second throttling device;

[0042] 300. Electric auxiliary heating device.

[0043] 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. Detailed implementation manners

[0044] 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 shall fall within the protection scope of the present utility model.

[0045] It should be noted that if there are directional indications in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying 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 scenarios. Taking "A and / or B" as an example, it includes scenario A, scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various 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 results in contradictions 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.

[0047] A dishwasher is a device for automatically cleaning tableware such as bowls, chopsticks, plates, dishes, knives, forks, etc. 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 structures: 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 improve work efficiency and enhance cleanliness and hygiene.

[0048] The present utility model provides 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. Among them, when used as a commercial dishwasher, the advantages are more obvious. For the convenience of understanding and description, in the attached Figure 1 drawings of the present utility model, the space, groove or hole is indicated by a solid arrow. Please refer to Figure 1, in an embodiment of the present utility model, the 10 includes a dishwasher main body 100 and a heat pump system 200. The dishwasher 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 wash the tableware placed in the washing chamber 101. The heat pump system 200 includes a compression device 210, a switching device 220, 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 forms a first circulating heat exchange loop with the first heat exchange channel and the second heat exchange device 250 through the switching device 220, and the compression device 210 forms a second circulating heat exchange loop with the air heating device 240 and the air cooling device 260 through the switching device 220. The second heat exchange channel is communicated with 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.

[0049] The switching device 220 is used to control the refrigerant discharged from the compression device 210 to pass through the first circulating heat exchange loop, so that the media in the first heat exchange channel and the second heat exchange channel exchange heat with each other to obtain hot water for the spraying system 110, and is also used to control the refrigerant discharged from the compression device 210 to pass through the second circulating heat exchange loop.

[0050] As such, by using independent heat exchange components for the washing stage and the drying stage of the dishwasher 10 respectively, the dishwasher 10 can utilize energy more effectively. Each circulating heat exchange loop can be responsible for the heat transfer in the washing and drying stages respectively, thereby improving the overall efficiency. Secondly, the two relatively independent circulating heat exchange loops enable the dishwasher 10 to have greater flexibility during the washing and drying processes. The working states and parameters of each system can be independently controlled according to needs to meet different washing and drying requirements. Since each system has its own independent heat exchange components, the energy flow can be controlled more effectively, reducing energy waste, which helps to reduce the energy consumption of the dishwasher 10 and improve the energy utilization rate.

[0051] The technical solution of the present utility model improves the washing and drying efficiency, flexibility, and energy utilization rate of the dishwasher 10 by using independent heat exchange components for the washing stage and the drying stage of the dishwasher 10 respectively. This design not only provides a better dishwashing experience but also helps to save energy and reduce maintenance costs.

[0052] The specific structure of the dishwasher 10 will be described in detail below.

[0053] Please refer to Figure 1 , in the embodiment of the present utility model, the dishwasher 10 includes a dishwasher main body 100 and a heat pump system 200.

[0054] Among them, the dishwasher main body 100 generally includes a housing and a spraying system 110. The housing defines a washing chamber 101 and an internal circulation air duct 102. The housing generally includes an outer shell, an inner liner, and a door body. The outer shell is provided with a first opening. The inner liner is disposed inside the outer shell. The inner liner is provided with a second opening corresponding to the position of the first opening. The door body is disposed on the outer shell to open or cover the first opening and the second opening. When the door body covers the first opening and the second opening, the inner liner and the door body 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 body and the inner liner of the dishwasher 10 can be integrated together.

[0055] 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 spraying system 110 controller, a filter, a water level sensor, and a drainage device.

[0056] Among them, the water pump 111 is one of the key components of the spray system 110 of the dishwasher 10, responsible for delivering the cleaning agent and water 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, which is the outlet for liquid spraying in the spray system 110 of the dishwasher 10. They are usually located inside the dishwasher 10 and spray the cleaning agent and water evenly onto the surfaces of dishes, tableware, etc. by rotating or directional spraying to achieve thorough cleaning. The water pipes and pipeline system are responsible for delivering water from the water pump 111 to the spray arm or nozzle and ensuring the smooth flow of water to the target area. These pipes are usually made of corrosion-resistant materials such as stainless steel or plastic. The controller of the spray system 110 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 users 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.

[0057] Exemplarily, the spray system 110 includes a water collection tank 113, a water pump 111, and a spray assembly 112; the spray assembly 112 is arranged in the washing chamber 101 for spraying washing water into the washing chamber 101, the water collection tank 113 is communicated with the second heat exchange channel, the second heat exchange channel is communicated with the spray assembly 112 through a pipeline, and the water pump 112 is arranged on the connecting pipeline between the second heat exchange channel and the spray assembly 112.

[0058] The heat pump system 200 includes a compression device 210, a switching device 220, 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 second heat exchange channel is communicated with 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, the compression device 210 forms a first circulating heat exchange loop with the first heat exchange channel and the second heat exchange device 250 through the switching device 220, and the compression device 210 forms a second circulating heat exchange loop with the air heating device 240 and the air cooling device 260 through the switching device 220.

[0059] Regarding the compression device 210, the main function of the compression device 210 is to compress the refrigerant with low temperature and low pressure into a refrigerant with 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 motion or rotational 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 effect of refrigeration or heating.

[0060] 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 refrigerants such as those that can be compressed by the compression device 210, and the second heat exchange channel is in communication with the spraying system 110.

[0061] 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.

[0062] Among them, the shell-and-tube heat exchanger consists of a tube bundle and a shell. The heat transfer medium passes through the tube bundle to transfer heat to another medium, and the shell flows 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.

[0063] The plate heat exchanger consists of multiple plates with gaps between them. 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.

[0064] The spiral plate heat exchanger achieves 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.

[0065] The spiral heat exchanger, through a spiral pipe structure, can effectively transfer the heat of one medium to another medium. The above two media usually refer to refrigerants, air, or water.

[0066] In an exemplary embodiment, the first heat exchange device 230 includes a box body 232 and a first heat exchange member 231 disposed in the box body 232. 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.

[0067] 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 exchanger 231 is located in the water, so as to heat the water in the box body 232. Among them, when the first heat exchanger 231 is a spiral plate heat exchanger, the heating efficiency is better. 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.

[0068] Regarding the second heat exchange device 250, in this embodiment, the second heat exchange device 250 is generally used to exchange heat with the air, usually to absorb the heat in the air. The second heat exchange device 250 generally consists of heat sinks, fans and heat dissipation pipes, and cools the gas through forced convection. For example, the second heat exchange device 250 includes a second heat exchanger 251 and a second fan 252. The second fan 252 is used to supply air to the second heat exchanger 251, and the second heat exchanger 251 is provided with heat exchange channels for the medium to flow through. Of course, in other embodiments, it may also be that the spiral plate heat exchanger and the box body 232 cooperate or other heat exchangers are used to achieve heat exchange.

[0069] 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 arranged in the internal circulation air duct 102 along the direction of the air inlet 102a and the air outlet 102b. In this way, in the drying mode or 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.

[0070] Among them, the air cooling device 260 is mainly used to transfer the heat in the heat medium to the surrounding air to achieve cooling. Such a heat exchanger usually includes heat sinks 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 the air through a spiral pipe structure.

[0071] 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 achieve the difference between refrigeration and heating, which will not be elaborated here.

[0072] In one embodiment, the second heat exchange device 250 includes a second heat exchange member 251 and a second fan 252, and the second fan 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 may also be other types of heat exchangers.

[0073] In another 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. 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 may also be other types of heat exchangers.

[0074] In yet another embodiment, the air cooling device 260 includes a fourth heat exchange member 241 and a second fan 242, and the second fan 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 may also be other types of heat exchangers.

[0075] Among them, the second heat exchange member 251, the third heat exchange member 261, and the fourth heat exchange member 241 are all provided with heat exchange channels for the medium to flow through.

[0076] The dishwasher includes a control component, and the control component is used to control the operation of the second fan 252 during the washing stage and control the operation of the third fan 262 and / or the fourth fan 242 during the drying stage. Among them, controlling the operation of the second fan 252, controlling the operation of the third fan 262 and the fourth fan 242, the operation of the fan includes controlling its startup, startup duration, and the rotation speed of the fan.

[0077] In an exemplary embodiment, the second heat exchange device 250 includes a second heat exchange member 251 and a second fan 252, and the second fan 252 is used to supply air to the second heat exchange member 251; 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; heat exchange channels for the medium to flow through are provided in the second heat exchange member 251, the third heat exchange member, and the fourth heat exchange member 241. Through the arrangements of the second fan 252, the third fan 262, and the fourth fan 242, the heat exchange efficiency of the second heat exchange device 250, the second heat exchange device 250, and the air heating device 240 can be increased.

[0078] In a preferred embodiment, only one of the third fan 262 and the fourth fan 242 may be selected.

[0079] Regarding the switching device, the switching device 220 is used to control the refrigerant discharged from the compression device 210 to pass through the first circulation heat exchange circuit during the washing stage, and to control the refrigerant discharged from the compression device 210 to pass through the second circulation heat exchange circuit during the drying stage. That is to say, the switching device 220 is used to control the refrigerant discharged from the compression device 210 to pass through the first circulation heat exchange circuit, so that the media in the first heat exchange channel and the second heat exchange channel exchange heat with each other to obtain hot water for the spraying system 110, and is also used to control the refrigerant discharged from the compression device 210 to pass through the second circulation heat exchange circuit.

[0080] Among them, the switching device 220 may be a multi-way valve such as a three-way valve, or may be composed of a plurality of stop valves or ordinary on-off valves. The control pipeline composed of a plurality of stop valves or on-off valves has the advantage of low noise, and the control pipeline provided with a three-way valve has the advantage of small occupation of the internal space of the dishwasher 10.

[0081] Exemplarily, the switching device 220 is a three-way valve. A three-way valve is a common valve used to control the flow direction of a fluid between two inlets and one outlet or to distribute the fluid flow direction.

[0082] The basic structure of a three-way valve includes a valve body, a valve core and a seal. These components work together to enable the three-way valve to control the flow direction of the fluid or distribute the flow direction of the fluid. The valve body is the main component of the three-way valve, which is usually a structure made of metal or alloy similar to a pipe connection. It has two inlets and one outlet, forming a "Y" or "T" shaped structure. The valve core is a key component for controlling the flow of fluid. It is usually located inside the main body 100 and can be moved to change the channel between the inlet and the outlet. The movement of the valve core can be manually operated or controlled by an electric, pneumatic or hydraulic actuator. The seal is used to ensure the sealing of the valve when it is closed to prevent fluid leakage. The three-way valve usually has a variety of connection methods such as welding, threading or flanges so that it can be installed in the pipeline system. In addition, some three-way valves are equipped with actuators to automatically control the movement of the valve core to achieve remote or automated control. The actuator can be manual, electric, pneumatic or hydraulic.

[0083] Specifically, the valve body includes a first interface, a second interface and a third interface. In one embodiment, the first interface is used to communicate with the exhaust port of the compression device; the second interface is used to communicate with the first heat exchange channel of the first heat exchange device 230, and the third interface is used to communicate with the air heating device 240; in the washing stage, the first interface is connected to the second interface, and the first interface is isolated from the third interface; in the drying stage, the first interface is connected to the third interface, and the first interface is isolated from the second interface. That is to say, the first interface, the second interface and the third interface have a first connection state and a second connection state; in the first connection state, the first interface is connected to the second interface, and the first interface is isolated from the third interface; in the second connection state, the first interface is connected to the third interface, and the first interface is isolated from the second interface.

[0084] It is understandable that the dishwasher 10 usually also includes a cutlery rack, or may also include some other auxiliary components, such as an insulation box, a cutlery holder, a filter, etc., to ensure the normal operation and maintenance convenience of the dishwasher 10, which will not be explained one by one here.

[0085] In the actual working process, the heat pump system 200 includes a throttling device, wherein the throttling device mainly has the following functions:

[0086] Adjusting the refrigerant flow: The throttling device can throttle and reduce the pressure of the high-pressure liquid from the air heating device 240 to a low-pressure liquid, and at the same time adjust the refrigerant flow entering the evaporator, thereby ensuring that the refrigerant flow in the heat pump system 200 is within a reasonable range.

[0087] Reduce the heat exchange difficulty: For example, during the heat exchange process, the throttling device causes the refrigerant liquid to flow through a small hole, forming a local contraction, which increases the flow velocity and reduces the static pressure. This pressure difference makes it easier for the refrigerant to evaporate in the evaporator, reducing the heat exchange difficulty and improving the heat exchange efficiency.

[0088] Achieve temperature control: The throttling device can also be an important part of temperature control. When the system needs a colder temperature, the refrigerant flow can be reduced through the throttling device to lower the evaporation temperature. Conversely, when the system needs a warmer temperature, the refrigerant flow can be increased through the throttling device to raise the evaporation temperature.

[0089] In one embodiment, to facilitate temperature control during the washing stage and reduce the heat exchange difficulty during the washing stage, the heat pump system 200 includes a first throttling device 270, and the first throttling device 270 is disposed on the flow path between the first heat exchange device 230 and the second heat exchange device 250.

[0090] In another embodiment, to facilitate temperature control during the drying stage and reduce the heat exchange difficulty during the washing stage, the heat pump system 200 includes a second throttling device 280, and the second throttling device 280 is disposed on the flow path between the air heating device 240 and the air cooling device 260.

[0091] In one embodiment, the dishwasher main body 100 includes a housing, the housing includes an outer shell, a door body, an inner container with an opening on one side, and a water collecting tank 113 disposed below the inner container; the door body is rotatably disposed on the outer shell for opening or covering the opening; when the door body covers the opening, the inner container, the water collecting tank 113, and the door body enclose to form the washing chamber 101, and an inner circulation air duct 102 is formed between the outer shell and the inner container.

[0092] Based on the previous embodiment, 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 252 is used to supply air to the second heat exchange member 251;

[0093] 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. In this way, 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.

[0094] In addition, to make the exhaust air flow more smoothly, the exhaust port and the door body are arranged on the same side of the housing. That is, the exhaust port is arranged on the front side. In this way, when the dishwasher 10 is placed against the wall, the blockage of the exhaust port or the interception of the air flow are avoided, so that the exhaust air flow is smoother.

[0095] In other embodiments, the second heat exchange device 250 can also be arranged outside the housing of the dishwasher 10.

[0096] In some embodiments, the air inlet 102a of the internal circulation air duct 102 is arranged at the upper part of the inner container, and the air outlet 102b of the internal circulation air duct 102 is arranged at the lower part of the inner container. Among them, the median line of the height of the inner container can be used as the 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 internal circulation air duct 102 can be arranged on the same side of the inner container.

[0097] Taking the inner container as an example of a certain direction, the air inlet 102a and the air outlet 102b of the internal circulation air duct 102 can be arranged on the left side, the right side or the rear side of the inner container. At this time, the air cooling device 260 and the air heating device 240 can also be arranged on the same side of the inner container, on the left side, the right side or the rear side of the inner container.

[0098] In another embodiment, the air cooling device 260 and the air heating device 240 are arranged below the inner container.

[0099] 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.

[0100] Among them, the electric auxiliary heating device 300 is arranged on the flow path between the box body 232 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 both the internal circulation air duct 102 and the flow path between the box body 232 and the spraying assembly 112, or one electric auxiliary heating device 300 can be heated correspondingly during both the washing stage and the drying stage.

[0101] Exemplarily, the electric auxiliary heating device 300 generally includes an electric heating element, a control element and a protection element.

[0102] The heating element is usually an electric heating wire, an electric heating tube or an electric heating plate, and is a key component for converting electrical energy into heat energy. The control element is used to control the heating power and working state of the electric heating element, and usually 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 usually includes an overheat protector and a leakage protector.

[0103] When the heat pump system 200 needs additional heating, the control device receives a signal and causes the electric heating element to heat up. The electric heating element generates heat energy under the action of current and transfers the heat energy to the surrounding fluid. 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.

[0104] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A dishwasher, characterized in that: include: The dishwasher body comprises a washing chamber, an internal circulation air duct and a spray system, wherein the internal circulation air duct comprises an air inlet and an air outlet, wherein the air inlet and the air outlet are both 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; A heat pump system, comprising a compression device, a switching 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 arranged for heat exchange with each other; the compression device forms a first circulation heat exchange loop with the first heat exchange channel and the second heat exchange device through the switching device, and the compression device forms a second circulation heat exchange loop with the air heating device and the air cooling device through the switching device; The second heat exchange channel is in communication with 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; The switching device is used to control the refrigerant discharged from the compression device to pass through the first circulation heat exchange circuit, so that 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, and is also used to control the refrigerant discharged from the compression device to pass through the second circulation heat exchange circuit.

2. 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.

3. The dishwasher according to claim 2, characterized in that The switching device comprises a first interface, a second interface and a third interface, wherein the first interface is used to communicate with the exhaust port of the compression device; the second interface is used to communicate with the first heat exchange channel of the first heat exchange device, and the third interface is used to communicate with the air heating device; The first interface, the second interface and the third interface have a first connected state and a second connected state; in the first connected state, the first interface is connected to the second interface, and the first interface is isolated from the third interface; in the second connected state, the first interface is connected to the third interface, and the first interface is isolated from the second interface.

4. The dishwasher according to claim 2, 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; Wherein, 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, 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 is provided on the outer shell to open or cover the first opening and the second opening; when the door body covers the first opening and the second opening, the inner tank and the door body enclose the washing chamber, and the exhaust port and the first opening are provided on the same side of the outer shell.

8. The dishwasher according to claim 6, characterized in that The air inlet of the inner circulation air duct is arranged at the upper part of the inner liner, and the air outlet of the inner circulation air duct is arranged at the lower part of the inner liner.

9. The dishwasher according to claim 2, 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.

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