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 comprises a spraying system, a shell and an inner container arranged in the shell, and at least one mounting gap exists among the shell, the inner container and the spraying system; the heat pump system comprises a compression device, a first heat exchange device and a second heat exchange device, the first heat exchange device comprises an outer pipe and an inner pipe, the outer pipe and the inner pipe are flexible parts, the inner pipe forms a first heat exchange channel, and a second heat exchange channel is formed between the outer pipe and the inner pipe; or the inner pipe forms a second heat exchange channel, and a first heat exchange channel is formed between the outer pipe and the inner pipe; and the first heat exchange device is arranged in the mounting gap. According to the technical scheme, the first heat exchange device is the tubular flexible part and can be more conveniently arranged in the inner space of the dish washing machine, the installation space occupied by the first heat exchange device is reduced, and the inner structure of the dish washing machine is more compact.

Description

Technical Field

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

[0002] A heat pump type dishwasher is a dishwasher that uses a heat pump circulation system heating method to provide hot water. Its working principle is as follows: The compressor compresses and discharges high-pressure and high-temperature steam refrigerant outward. This high-pressure and high-temperature steam refrigerant first passes through the cold-side heat exchanger and is condensed into medium-pressure and normal-temperature liquid refrigerant in the cold-side heat exchanger, and then is sent to the hot-side heat exchanger after being depressurized and cooled by a throttling component. The liquid refrigerant absorbs heat in the cold-side heat exchanger and completely evaporates into gaseous refrigerant, and finally returns to the compressor for re-compression to enter the next refrigerant cycle process. In the related prior art, the heat pump system of the dishwasher has the problem of occupying too much installation space of the dishwasher. Summary of the Utility Model

[0003] The main object of the utility model is to propose a dishwasher, aiming to reduce the installation space occupied by the heat pump system.

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

[0005] A dishwasher main body, the dishwasher main body includes a spraying system, a housing, and an inner container arranged in the housing, and there is at least one installation gap between the housing, the inner container, and the spraying system; and

[0006] A heat pump system, including a compression device, a first heat exchange device, and a second heat exchange device. The first heat exchange device has a first heat exchange channel and a second heat exchange channel that are arranged for heat exchange with each other; the compression device, the first heat exchange channel of the first heat exchange device, and the second heat exchange device are sequentially connected and form a circulating heat exchange loop; 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 first heat exchange device includes an outer pipe and an inner pipe. The outer pipe and the inner pipe are flexible members. The inner pipe forms the first heat exchange channel, and the second heat exchange channel is formed between the outer pipe and the inner pipe; or the inner pipe forms the second heat exchange channel, and the first heat exchange channel is formed between the outer pipe and the inner pipe; the first heat exchange device is arranged in the installation gap.

[0008] In one embodiment, the dishwasher main body includes 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 a washing chamber. The spraying system includes a water pump, a water collecting tank, and a spraying assembly. The spraying assembly is disposed in the washing chamber. The water pump is disposed on the flow path between the second heat exchange channel and the spraying assembly. The water collecting tank is disposed on the bottom surface of the inner liner. An installation gap is formed between the outer shell, the inner liner, and the water collecting tank. The first heat exchange device is disposed on one side of the water collecting tank; or, the first heat exchange device is wound around the periphery of the water collecting tank; or, the first heat exchange device is disposed by adhering to the inner wall of the outer shell and extends along the inner wall of the outer shell.

[0009] In one embodiment, the dishwasher includes an air heating device and an air cooling device. The dishwasher main body has an internal circulation air duct. The internal circulation air duct has an air inlet and an air outlet. Both the air inlet and the air outlet are communicated with the washing chamber. The air cooling device and the air heating device are sequentially disposed in the internal circulation air duct along the directions of the air inlet and the air outlet.

[0010] The compression device, 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.

[0011] In one embodiment, the heat pump system includes a first throttling device. The first throttling device is disposed on the flow path between the air cooling device and the second heat exchange device.

[0012] And / or, the heat pump system includes a second throttling device. The second throttling device is disposed on the flow path between the air heating device and the air cooling device.

[0013] In one embodiment, the dishwasher further includes a switching device, an air heating device, and an air cooling device. The dishwasher main body has an internal circulation air duct. The internal circulation air duct has an air inlet and an air outlet. Both the air inlet and the air outlet are communicated with the washing chamber. The air cooling device and the air heating device are sequentially disposed in the internal circulation air duct along the directions of the air inlet and the air outlet.

[0014] The compression device forms 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 forms a second circulating heat exchange loop with the air heating device and the air cooling device through the switching device.

[0015] The switching device is used to control the refrigerant discharged from the compression device to pass through the first circulating 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 spraying system, and is also used to control the refrigerant discharged from the compression device to pass through the second circulating heat exchange circuit.

[0016] In one embodiment, the heat pump system includes a first throttling device, and the first throttling device is arranged on the flow path between the first heat exchange device and the second heat exchange device;

[0017] And / or, the heat pump system includes a second throttling device, and the second throttling device is arranged on the flow path between the air heating device and the air cooling device.

[0018] In one embodiment, the second heat exchange device includes a second heat exchange member and a second fan, and the second fan is used to supply air to the second heat exchange member;

[0019] The air cooling device includes a third heat exchange member and a third fan, and the third fan is used to supply air to the third heat exchange member;

[0020] The air heating device includes a fourth heat exchange member and a fourth fan, and the fourth fan is used to supply air to the fourth heat exchange member;

[0021] 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.

[0022] In one embodiment, the inner circulation air duct is formed between the outer shell and the inner liner, the outer shell is provided with an air outlet, and the air outlet side of the second fan is communicated with the air outlet.

[0023] In one embodiment, the dishwasher main body includes a door body, the outer shell is provided with a first opening, the inner liner is arranged inside the outer shell, the inner liner is provided with a second opening corresponding to the position of the first opening, and the door body is arranged 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, and the air outlet and the door body are arranged on the same side of the outer shell.

[0024] 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 and the spraying assembly; and / or, the electric auxiliary heating device is arranged in the inner circulation air duct.

[0025] The technical solution of the present utility model sets the first heat exchange device as a tubular flexible member, so that the first heat exchange device can be arranged in the spray system, the housing and the inner container arranged in the housing, and the installation gaps between the housing, the inner container and the spray system. In this way, it can be more conveniently arranged in the internal space of the dishwasher, reducing the gap between the first heat exchange device and other components of the dishwasher, and reducing the installation space occupied by the first heat exchange device, making the internal structure of the dishwasher more compact. Description of the Drawings

[0026] 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.

[0027] Figure 1 It is a schematic structural diagram of an embodiment of a dishwasher provided by the present utility model;

[0028] Figure 2 It is a schematic structural diagram of another embodiment of a dishwasher provided by the present utility model;

[0029] Figure 3 It is a schematic structural diagram of yet another embodiment of a dishwasher provided by the present utility model.

[0030] Explanation of the reference numerals in the drawings:

[0031] 10. Dishwasher;

[0032] 100. Main body;

[0033] 101. Washing chamber;

[0034] 102. Inner circulation air duct; 102a. Air inlet; 102b. Air outlet;

[0035] 110. Spray system; 111. Water pump; 112. Spray assembly;

[0036] 113. Water collection tank;

[0037] 200. Heat pump system;

[0038] 210. Compression device;

[0039] 220. Switching device;

[0040] 230. First heat exchange device; 231. First heat exchange member; 232. Box body;

[0041] 240. Air heating device; 241. Fourth heat exchanger; 242. Fourth fan;

[0042] 250. Second heat exchange device; 251. Second heat exchanger; 252. Second fan;

[0043] 260. Air cooling device; 261. Third heat component; 262. Third fan;

[0044] 270. First throttling device;

[0045] 280. Second throttling device;

[0046] 300. Electric auxiliary heating device.

[0047] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0048] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with 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 making creative efforts belong to the scope of protection of the present utility model.

[0049] 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.

[0050] 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 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 it. 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.

[0051] A dishwasher is a device for automatically cleaning 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.

[0052] The present utility model proposes a dishwasher, aiming to solve the problem that the heat exchanger on the cold side of the heat pump type dishwasher is prone to condensation. This dishwasher is a heat pump type dishwasher and can be used for household or commercial use. When used as a commercial dishwasher, the advantages are more obvious. For the convenience of understanding and description, in the attached Figure 1 and Figure 2 of the specification of the present utility model, the space, groove or hole is indicated by a solid arrow.

[0053] Please refer to Figures 1 to 2 , in an embodiment of the present utility model, the dishwasher 10 includes a dishwasher main body 100 and a heat pump system 200. The dishwasher main body 100 includes a spraying system 110, a housing, and an inner container provided in the housing. There is at least one installation gap between the housing, the inner container, and the spraying system 110; the heat pump system 200 includes a compression device 210, a first heat exchange device 230, and a second heat exchange device 250. 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, and the second heat exchange device 250 are sequentially connected and 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 first heat exchange device 230 includes an outer tube and an inner tube, the outer tube and the inner tube are flexible parts, 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; the first heat exchange device 230 is arranged in the installation gap.

[0054] The technical solution of the present utility model sets the first heat exchange device 230 as a tubular flexible part, so that the first heat exchange device 230 can be arranged in the installation gap between the spraying system 110, the housing, and the inner container provided in the housing. In this way, it can be more conveniently arranged in the internal space of the dishwasher 10, reducing the gap between the first heat exchange device 230 and other components of the dishwasher 10, and reducing the installation space occupied by the first heat exchange device 230, making the internal structure of the dishwasher 10 more compact.

[0055] The specific structure of the dishwasher 10 will be described in detail below.

[0056] Among them, the dishwasher main body 100 generally includes a housing and a spraying system 110. The housing constructs 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 may be integrated together.

[0057] Regarding the spraying system 110, the spraying assembly 112 is disposed in the washing chamber 101 and is used to spray washing water into the washing chamber 101 to wash the tableware placed in the washing chamber 101. The water pump 111 is disposed on the flow path between the second heat exchange channel and the spraying assembly 112 and is used to convey the washing water in the second heat exchange channel to the spraying assembly 112. The spraying system 110 generally further includes a water pipe and a pipeline system, a spraying system 110 controller, a filter, a water level sensor, and a drainage device.

[0058] 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 body 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 number of spray arms or nozzles is usually multiple. The spray assembly 112 is the outlet of 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 bowls, dishes, etc. by rotating or directional spraying to thoroughly clean. The water pipes and pipeline 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.

[0059] Regarding the installation gap, this installation gap can be formed between the outer shell and the inner liner, or between the outer shell and the spray system 110, or between the outer shell, the inner liner, and the spray system 110. In short, this installation gap can be formed between any necessary components of the dishwasher 10.

[0060] In an exemplary embodiment, the spray system 110 includes a water pump 111, a water collection tank 113, and a spray assembly 112. The spray assembly 112 is disposed in the washing chamber 101. The water pump 111 is disposed on the flow path between the second heat exchange channel and the spray assembly 112. The water collection tank 113 is disposed on the bottom surface of the inner liner. The installation gap is formed between the outer shell, the inner liner, and the water collection tank 113. There are many installation positions for the first heat exchange device 230, which will be specifically exemplified below.

[0061] First, the first heat exchange device 230 is disposed on one side of the water collection tank 113. That is to say, the first heat exchange device 230 is disposed on one side of the water collection tank 113. For example, the first heat exchange device 230 is disposed on the front side, rear side, left side, right side or bottom side of the water collection tank 113, etc. Among them, the side facing the user (the side where the door body is located) is the front side. Preferably, the first heat exchange device 230 is disposed on the rear side of the water collection tank 113 (that is, the side facing away from the door body).

[0062] Second, the first heat exchange device 230 is wound around the peripheral side of the water collection tank 113. That is to say, the first heat exchange device 230 is wound around the water collection tank 113.

[0063] Third, the first heat exchange device 230 is disposed by adhering to the inner wall of the outer shell, and the first heat exchange device 230 extends along the inner wall of the outer shell. That is, the first heat exchange device 230 is installed on the inner wall of the outer shell.

[0064] In a preferred embodiment, please refer to Figure 2 , the dishwasher 10 further includes a switching device 220, an air heating device 240 and an air cooling device 260; the dishwasher main body 100 has an internal circulation air duct 102, the internal circulation air duct 102 has an air inlet 102a and an air outlet 102b, both the air inlet 102a and the air outlet 102b are communicated with the washing chamber 101, and the air cooling device 260 and the air heating device 240 are sequentially disposed in the internal circulation air duct 102 along the directions 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; the switching device 220 is used to control the refrigerant discharged by 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 by the compression device 210 to pass through the second circulating heat exchange loop.

[0065] Regarding the compression device 210, the main function of the compression device 210 is to compress the low-temperature and low-pressure refrigerant into a high-temperature and high-pressure refrigerant to achieve a refrigeration cycle. Its working principle is that the compression device 210 sucks the refrigerant from the suction port 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 refrigeration or heating effect.

[0066] 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 refrigerants that can be compressed by the compression device 210, and the second heat exchange channel is communicated with the spray system 110.

[0067] 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.

[0068] Among them, the shell-and-tube heat exchanger consists of a tube bundle (inner tube) and an outer tube. 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 outer tube 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 outer tube, or the inner tube forms the second heat exchange channel, and the first heat exchange channel is formed between the inner tube and the outer tube. Preferably, the inner tube forms the first heat exchange channel, and the second heat exchange channel is formed between the inner tube and the outer tube.

[0069] The plate heat exchanger consists of multiple plates with 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.

[0070] The spiral plate heat exchanger realizes efficient heat transfer through a multi-layer spiral plate structure. This heat exchanger combines the advantages of a plate heat exchanger and a shell-and-tube heat exchanger.

[0071] The spiral heat exchanger, through a spiral pipe structure, can effectively transfer the heat of one of the media to another medium. The above two media usually refer to refrigerants, air, or water.

[0072] In an exemplary embodiment, the first heat exchange device 230 includes a box body 232 and a first heat exchange element 231 disposed within the box body 232. The first heat exchange channel is disposed in the first heat exchange element 231, and the second heat exchange channel is disposed in the box body 232. Wherein, the box body 232 is used for temporarily storing the washing water to be heated. When in the washing mode, the first heat exchange element 231 is located in the water, thereby heating the water in the box body 232. In another 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 a 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 a first heat exchange channel is formed between the outer tube and the inner tube. Among them, when the first heat exchange element 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 enables this embodiment to have a higher heat exchange efficiency and a smaller volume.

[0073] Regarding the second heat exchange device 250, in this embodiment, the second heat exchange device 250 exchanges heat with the liquid in the liquid storage device. For example, the second heat exchange device 250 can be a spiral plate heat exchanger.

[0074] 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 inner circulation air duct 102 along the direction of the air inlet 102a and the air outlet 102b. Thus, in the drying mode or during the drying stage, the high-temperature and high-humidity air in the dishwasher 10 enters the inner 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.

[0075] 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. This type of 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 the air through a spiral pipe structure.

[0076] In this embodiment, the air heating device 240 has the same structure as the air cooling device 260, mainly with different installation positions, so as to achieve the difference between refrigeration and heating, which will not be elaborated here.

[0077] In an exemplary embodiment, the air cooling device 260 includes a third heat exchanger and a third fan 262, and the third fan 262 is configured to supply air to the third heat exchanger; the air heating device 240 includes a fourth heat exchanger 241 and a fourth fan 242, and the fourth fan 242 is configured to supply air to the fourth heat exchanger 241; the second heat exchanger 251, the third heat exchanger, and the fourth heat exchanger 241 are all provided with heat exchange channels for the medium to flow through. By providing 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 increased.

[0078] Regarding the switching device 220, the switching device 220 is configured to control the refrigerant discharged from the compression device 210 to pass through the first circulation heat exchange loop during the washing stage, and to control the refrigerant discharged from the compression device 210 to pass through the second circulation heat exchange loop during the drying stage. That is to say, the switching device 220 is configured to control the refrigerant discharged from the compression device 210 to pass through the first circulation 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 110, and is further configured to control the refrigerant discharged from the compression device 210 to pass through the second circulation heat exchange loop, so as to first cool and dehumidify the high-temperature and high-humidity gas in the washing chamber 101 during the drying stage, and then deliver it to the washing chamber 101 after heating to dry the tableware in the washing chamber 101.

[0079] Among them, the switching device 220 can be a multi-way valve such as a three-way valve, or it can 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.

[0080] 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 fluid between two inlets and one outlet or to distribute the fluid flow direction.

[0081] 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.

[0082] 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 compressor; 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. In other words, 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.

[0083] It is understandable that the dishwasher 10 usually also includes a cutlery rack, a water collection tank, etc., 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.

[0084] In the actual working process, the heat pump system 200 includes a throttling device, wherein the throttling device mainly has the following functions:

[0085] 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.

[0086] 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 rate 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.

[0087] 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.

[0088] In one embodiment, the heat pump system 200 includes a first throttling device 270 disposed on the flow path between the first heat exchange device 230 and the second heat exchange device 250;

[0089] In another embodiment, the heat pump system 200 includes a second throttling device 280 disposed on the flow path between the air heating device 240 and the air cooling device 260.

[0090] In another preferred embodiment, please refer to Figure 1 , the dishwasher 10 includes an air heating device 240 and an air cooling device 260. The dishwasher main body 100 has an internal circulation air duct 102 with an air inlet 102a and an air outlet 102b. Both the air inlet 102a and the air outlet 102b communicate with the washing chamber 101. 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; the compression device 210, 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 to form a circulating heat exchange loop.

[0091] Among them, the structures and functions of the compression device 210, the first heat exchange device 230, the air heating device 240, the air cooling device 260, and the second heat exchange device 250 are the same as those in the previous embodiment, and will not be elaborated here.

[0092] The technical solution of this embodiment 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 220 by sequentially connecting 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.

[0093] In one embodiment, to facilitate the 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 air cooling device 260 and the second heat exchange device 250;

[0094] In another embodiment, to facilitate the 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.

[0095] 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.

[0096] In another embodiment, the air cooling device 260 includes a third heat exchange member and a third fan 262, and the third fan 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 may also be other types of heat exchangers.

[0097] In yet another embodiment, the air cooling device 260 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. 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.

[0098] Among them, 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.

[0099] In one embodiment, the dishwasher main body 100 includes a housing, which includes an outer shell, a door, an inner container with an opening on one side, and a water collecting tank disposed below the inner container; the door is rotatably disposed on the outer shell for opening or covering the opening; when the door covers the opening, the inner container, the water collecting tank, and the door enclose to form the washing chamber 101, and an internal circulation air duct 102 is formed between the outer shell and the inner container.

[0100] On the basis of 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 252 is used to supply air to the second heat exchange member 251.

[0101] 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 251 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.

[0102] In addition, in order to make the exhaust air smoother, the air outlet and the door 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.

[0103] In other embodiments, the second heat exchange device 250 can also be disposed outside the housing of the dishwasher 10.

[0104] In some embodiments, the air inlet 102a of the internal circulation air duct 102 is disposed at the upper part of the inner container, and the air outlet 102b of the internal 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 internal circulation air duct 102 can be disposed on the same side surface of the inner container.

[0105] Taking the inner container as an example of the direction, the air inlet 102a and the air outlet 102b of the internal 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.

[0106] In another embodiment, the air cooling device 260 and the air heating device 240 are disposed on the bottom surface of the inner container.

[0107] 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.

[0108] 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.

[0109] Exemplarily, the electric auxiliary heating device 300 generally includes an electric heating element, a control element and a protection element.

[0110] 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.

[0111] When the heat pump system 200 needs additional heating, the control device receives the signal and makes the electric heating element 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.

[0112] The above 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 any 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: A dishwasher body, comprising a spray system, an outer shell and an inner tank arranged on the outer shell, wherein at least one installation gap exists between the outer shell, the inner tank and the spray system; and A heat pump system, comprising a compression device, a first heat exchange device and a second heat exchange 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 and the second heat exchange device are sequentially connected 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 first heat exchange device includes an outer tube and an inner tube, the outer tube and the inner tube are flexible parts, 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; the first heat exchange device is arranged in the installation gap.

2. The dishwasher according to claim 1, characterized in that The dishwasher body comprises a door body, the outer shell is provided with a first opening, the inner tank is provided in the outer shell, 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 a washing chamber; The spray system comprises a water pump, a water collection tank and a spray assembly, wherein the spray assembly is arranged in the washing chamber, the water pump is arranged in the flow path between the second heat exchange channel and the spray assembly, the water collection tank is arranged on the bottom surface of the inner tank, and the installation gap is formed between the outer shell, the inner tank and the water collection tank; The first heat exchange device is arranged on one side of the water collecting tank; Or, the first heat exchange device is disposed around the circumference of the water collecting tank; Alternatively, the first heat exchange device is disposed in contact with the inner wall of the outer shell, and the first heat exchange device is extended along the inner wall of the outer shell.

3. The dishwasher according to claim 2, characterized in that The dishwasher comprises an air heating device and an air cooling device, the dishwasher body has an inner circulation air duct, the inner circulation air duct has an air inlet and an air outlet, the air inlet and the air outlet are both connected to the washing chamber, and 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 compression device, 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 the circulating heat exchange loop.

4. The dishwasher according to claim 3, characterized in that The heat pump system comprises a first throttling device, which is arranged on the flow path between the air cooling 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 2, characterized in that: The dishwasher further comprises a switching device, an air heating device and an air cooling device; the dishwasher body comprises an inner circulation air duct, the inner circulation air duct comprises an air inlet and an air outlet, the air inlet and the air outlet are both connected to the washing chamber, and 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 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 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.

6. The dishwasher according to claim 5, 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.

7. The dishwasher according to claim 4 or 6, 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.

8. The dishwasher according to claim 7, characterized in that The inner circulation air duct is formed between the outer shell and the inner tank, the outer shell is provided with an air outlet, and the air outlet side of the second fan is connected to the air outlet.

9. The dishwasher according to claim 8, characterized in that The air outlet and the door body are arranged on the same side of the shell.

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

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