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, a heat pump system and a liquid storage device, the dish-washing machine main body is provided with a washing chamber and a spraying system, and the heat pump system comprises a compression device, a first heat exchange device and a second heat exchange device. The compression device, a first heat exchange channel of the first heat exchange device and the second heat exchange device are sequentially communicated to form a circulating heat exchange loop; media in the first heat exchange channel and the second heat exchange channel exchange heat with each other, so that hot water is prepared and supplied to the spraying system; and the second heat exchange device is arranged in the liquid storage device. According to the technical scheme, the second heat exchange device is arranged in the liquid storage device, and the liquid storage device contains the cold storage liquid which can absorb the cold energy generated by the second heat exchange device, so that the cold side heat exchanger of the heat pump system of the dish-washing machine is prevented from being in direct contact with high-temperature and high-humidity gas in the dish-washing machine; the problem that a heat exchanger on the cold side of a heat pump type dish washing machine is prone to condensation is solved.

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 delivered 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 circulation process. In the related prior art, the cold-side heat exchanger of the heat pump type dishwasher is prone to condensation. Summary of the Utility Model

[0003] The main object of the utility model is to propose 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.

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

[0005] A dishwasher main body having a washing chamber and a spraying system, and the spraying system is used to spray 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 first heat exchange device and a second heat exchange device, and 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 connected to 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; and

[0007] A liquid storage device, and the second heat exchange device is arranged in the liquid storage device.

[0008] In an embodiment, the dishwasher includes an air heating device and an air cooling device. The dishwasher main body has an internal circulation air duct, and the internal circulation air duct has an air inlet and an air outlet. Both the air inlet and the air outlet are connected to the washing chamber, and the air cooling device and the air heating device are sequentially arranged in the internal circulation air duct along the direction of the air inlet and the air outlet;

[0009] The compression device, the first heat exchange device, the air heating device, the air cooling device and the second heat exchange device are sequentially connected to form a circulating heat exchange loop.

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

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

[0012] In one embodiment, the 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 with an air inlet and an air outlet, both the air inlet and the air outlet communicate with the washing chamber, and 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;

[0013] 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;

[0014] The switching device is configured 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 obtain hot water for the spraying system, and is further configured to control the refrigerant discharged from the compression device to pass through the second circulating heat exchange loop.

[0015] In one embodiment, the heat pump system includes a first throttling device disposed on the flow path between the first heat exchange device and the second heat exchange device;

[0016] And / or, the heat pump system includes a second throttling device disposed on the flow path between the air heating device and the air cooling device.

[0017] In one embodiment, the air cooling device includes a third heat exchange member and a third fan for supplying air to the third heat exchange member;

[0018] And / or, the air heating device includes a fourth heat exchange member and a fourth fan for supplying air to the fourth heat exchange member;

[0019] Both the third heat exchange member and the fourth heat exchange member are provided with heat exchange channels for the medium to flow through.

[0020] In one embodiment, the liquid storage device includes a device main body and a liquid level indicator that are detachably connected. The device main body has a liquid storage cavity, the second heat exchange device is disposed in the liquid storage cavity, and the liquid level indicator is used to monitor the liquid level of the liquid storage cavity.

[0021] In one embodiment, a liquid injection port is provided on the upper end surface of the device main body, and the liquid injection port is communicated with the liquid storage cavity.

[0022] In one embodiment, the spraying system includes a water collecting tank, a water pump and a spraying assembly; 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, the second heat exchange channel is communicated with the spraying assembly through a pipeline, and 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 and the spraying assembly; and / or, the electric auxiliary heating device is arranged in the internal circulation air duct.

[0024] The technical solution of the present utility model solves the problem that the heat exchanger on the cold side of the heat pump type dishwasher is prone to condensation by arranging the second heat exchange device in the liquid storage device, and the liquid storage device contains a cold storage liquid that can absorb the cold generated by the second heat exchange device, thereby avoiding the direct contact between the cold side heat exchanger of the dishwasher heat pump system and the high-temperature and high-humidity gas inside the dishwasher. BRIEF 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 following drawings are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings 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] Figure 2 It is a schematic structural diagram of another embodiment of the dishwasher provided by the present utility model.

[0028] Explanation of the reference numerals in the drawings:

[0029] 10. Dishwasher;

[0030] 100. Equipment main body;

[0031] 101. Washing chamber;

[0032] 102. Internal circulation air duct; 102a. Air inlet; 102b. Air outlet;

[0033] 110. Spraying system; 111. Water pump; 112. Spraying component; 113. Water collecting tank;

[0034] 200. Heat pump system;

[0035] 210. Compression device;

[0036] 220. Switching device;

[0037] 230. First heat exchange device; 231. First heat exchange element; 232. Box body;

[0038] 240. Air heating device; 241. Fourth heat exchange element; 242. Fourth fan;

[0039] 250. Second heat exchange device;

[0040] 260. Air cooling device; 261. Third heat exchange element; 262. Third fan;

[0041] 270. First throttling device;

[0042] 280. Second throttling device;

[0043] 290. Liquid storage device;

[0044] 300. Electric auxiliary heating device.

[0045] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0046] 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.

[0047] It should be noted that if there are directional indications 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.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, such 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, 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, or 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 ability of those of ordinary skill in the art to implement. 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.

[0049] The present utility model provides a dishwasher, aiming to solve the problem that the heat exchanger on the cold side of a heat pump dishwasher is prone to condensation. For ease of understanding and explanation, in the attached Figure 1 drawings of the present invention, the solid arrow indicates a space, groove or hole. The dishwasher can be a heat pump dishwasher, or a heat pump washing and drying integrated machine, etc. The dishwasher can be used for household or commercial purposes. When used as a commercial dishwasher, the advantages are more obvious. For ease of elaboration and explanation, the heat pump dishwasher will be taken as an example for introduction below.

[0050] 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. The dishwasher main body 100 has a washing chamber 101 and a spraying system 110. 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 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 connected to 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. A liquid storage device 290, and the second heat exchange device 250 is arranged in the liquid storage device 290.

[0051] Among them, when the dishwasher 10 is working, the liquid storage device 290 contains a cold storage liquid, and the second heat exchange device 250 is arranged in the liquid storage device 290. Among them, the second heat exchange device 250 can be partially immersed in the cold storage liquid or fully immersed in the cold storage liquid. Preferably, the second heat exchange device 250 is fully immersed in the cold storage liquid. Common cold storage liquids include water, ethylene glycol, ammonia water solution, etc., as well as some specially designed phase change materials. Of course, in some embodiments, the cold storage liquid can be just water. In this embodiment, the selection of the cold storage liquid depends on the preset power of the dishwasher 10.

[0052] Furthermore, in order to facilitate monitoring the liquid level in the liquid storage device and facilitate maintenance and management. The liquid storage device 290 includes a detachably connected device main body and a liquid level indicator; the device main body has a liquid storage cavity, the second heat exchange device 250 is arranged in the liquid storage cavity, and the liquid level indicator is used to monitor the liquid level of the liquid storage cavity.

[0053] In another embodiment, in order to facilitate replenishing the cold storage liquid, the device main body is provided with a liquid injection port on its upper end surface, and the liquid injection port is communicated with the liquid storage cavity.

[0054] The situation that the cold side heat exchanger of the heat pump system 200 of the dishwasher 10 is prone to condensation is mainly that the cold side heat exchanger is in a high humidity environment. When the humidity in the environment is high, condensation is likely to form on the surface of the cold side heat exchanger. This is because the high humidity air contains a large amount of water vapor. When the water vapor contacts the surface of the evaporator, due to the lower temperature of the evaporator surface, the water vapor will condense into water droplets.

[0055] The technical solution of the present utility model solves the problem that the heat exchanger on the cold side of the heat pump type dishwasher 10 is prone to condensation by arranging the second heat exchange device 250 in the liquid storage device 290, and the liquid storage device 290 containing the cold storage liquid can absorb the cold generated by the second heat exchange device 250, avoiding the direct contact between the cold side heat exchanger of the heat pump system 200 of the dishwasher 10 and the high temperature and high humidity gas inside the dishwasher 10.

[0056] In another embodiment, 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 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 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 configured 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 further configured to control the refrigerant discharged from the compression device 210 to pass through the second circulating heat exchange loop.

[0057] In this embodiment, 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.

[0058] 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.

[0059] The following will specifically describe the specific structure of the dishwasher 10 in detail.

[0060] 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 door body is disposed on the outer shell for opening or covering the first opening. When the door body covers the first opening, the inner liner and the door body enclose to form the washing chamber 101.

[0061] An 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.

[0062] Regarding the spray system 110, the spray assembly 112 is disposed in the washing chamber 101 for spraying washing water into the washing chamber 101 to clean 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 spray assembly 112 for delivering the washing water in the second heat exchange channel to the spray assembly 112. The spray system 110 generally further includes a water pipe and a piping system, a spray system 110 controller, a filter, a water level sensor, and a drainage device. Among them, the water pump 111 is one of the key components of the spray system 110 of the dishwasher 10, responsible for delivering the detergent 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 a nozzle, and the spray assembly 112 is the outlet of liquid injection in the spray system 110 of the dishwasher 10. They are usually located inside the dishwasher 10 and spray the detergent and water evenly onto the surfaces of bowls, dishes, tableware, etc. by rotating or directional spraying to thoroughly clean. The water pipe and the piping system are responsible for delivering the 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 a 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.

[0063] 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 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.

[0064] 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 the refrigerant with high temperature and high pressure to achieve the 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 discharge port. During this process, the temperature and pressure of the refrigerant will increase to achieve the refrigeration or heating effect.

[0065] 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 used for the refrigerant that can be compressed by the compression device 210 such as the refrigerant, and the second heat exchange channel is communicated with the spray system 110.

[0066] In this embodiment, the first heat exchange device 230 can be a double-pipe heat exchanger, a plate heat exchanger, a spiral heat exchanger or a spiral plate heat exchanger, etc.

[0067] Among them, the double-pipe 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 flows through the periphery of the tube bundle in the shell. 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.

[0068] 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.

[0069] The spiral plate heat exchanger realizes efficient heat transfer through a multi-layer spiral plate structure. This heat exchanger combines the advantages of the plate heat exchanger and the double-pipe heat exchanger.

[0070] 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 the refrigerant, air or water.

[0071] 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. Among them, the box body 232 is used to temporarily store the washing water to be heated. When in the washing mode, the first heat exchange 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 pipe and an inner pipe. The inner pipe forms the first heat exchange channel, and a second heat exchange channel is formed between the outer pipe and the inner pipe; alternatively, the inner pipe forms the second heat exchange channel, and a first heat exchange channel is formed between the outer pipe and the inner pipe. 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.

[0072] 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 290. For example, the second heat exchange device 250 can be a spiral plate heat exchanger.

[0073] 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 along the direction of the air inlet 102a and the air outlet 102b in the internal circulation air duct 102. Thus, in the drying mode or during the drying stage, the high-temperature and high-humidity air in the dishwasher 10 enters the internal circulation air duct 102 from the air inlet 102a, then is cooled and dehumidified by the air cooling device 260, and then heated by the air heating device 240, and then blown into the washing chamber 101 from the air outlet 102b to heat and dry the tableware in the washing chamber 101.

[0074] 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. 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. The air spiral heat exchanger combines the design of the spiral heat exchanger and the function of the air heat exchanger, and exchanges heat with the air through a spiral pipe structure.

[0075] 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.

[0076] In an exemplary embodiment, the air cooling device 260 includes a third heat exchanger 261 and a third fan 262, and the third fan 262 is configured to supply air to the third heat exchanger 261; 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 261, 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.

[0077] 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 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 configured 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 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 circuit, so as to cool and dehumidify the high-temperature and high-humidity gas in the washing chamber 101 first during the drying stage, and then convey it to the washing chamber 101 after heating to dry the tableware in the washing chamber 101.

[0078] 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.

[0079] 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.

[0080] 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 a fluid or distribute the fluid flow. The valve body is the main component of the three-way valve and is typically a structure made of metal or alloy similar to a pipe connection. It has two inlets and one outlet, forming a "Y" - shaped or "T" - shaped structure. The valve core is the key component for controlling fluid flow. It is usually located inside the main body 100 and can be moved to change the passage between the inlets and the outlet. The movement of the valve core can be controlled manually or by an electric, pneumatic, or hydraulic actuator. Seals are used to ensure the sealing performance when the valve is closed and prevent fluid leakage. The three-way valve usually has various connection methods such as welding, threading, or flanging for installation in a pipeline system. Additionally, some three-way valves are equipped with actuators for automatically controlling the movement of the valve core to achieve remote or automated control. The actuator can be manual, electric, pneumatic, or hydraulic.

[0081] 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; during the washing stage, the first interface is in communication with the second interface, and the first interface is blocked from the third interface; during the drying stage, the first interface is in communication with the third interface, and the first interface is blocked from the second interface. That is to say, the first interface, the second interface, and the third interface have a first communication state and a second communication state; in the first communication state, the first interface is in communication with the second interface, and the first interface is blocked from the third interface; in the second communication state, the first interface is in communication with the third interface, and the first interface is blocked from the second interface.

[0082] It can be understood that the dishwasher 10 usually also includes a tableware rack, etc., or may also include some other auxiliary components, such as a warming box, a tableware holder, a filter net, etc., to ensure the normal operation of the dishwasher 10 and the convenience of maintenance. Details are not elaborated here one by one.

[0083] During the actual working process, the heat pump system 200 includes a throttling device. Among them, the functions of the throttling device are mainly as follows:

[0084] Adjust the refrigerant flow: The throttling device can throttle and depressurize the high - pressure liquid from the air heating device 240 into a low - pressure liquid, and at the same time adjust the refrigerant flow into the evaporator, so as to ensure that the refrigerant flow in the heat pump system 200 is within a reasonable range.

[0085] 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.

[0086] Achieve temperature control: The throttling device can also be an important part of temperature control. When the system needs a colder temperature, the throttling device can be used to reduce the refrigerant flow rate, thereby lowering the evaporation temperature. Conversely, when the system needs a warmer temperature, the throttling device can be used to increase the refrigerant flow rate, thereby raising the evaporation temperature.

[0087] 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;

[0088] 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.

[0089] In one 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, and 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. 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, the first heat exchange device 230, the air heating device 240, the air cooling device 260, and the second heat exchange device 250 are sequentially communicated to form a circulating heat exchange loop. Thus, in the technical solution of this embodiment, the dishwasher 10 has a washing mode and a drying mode. In the circulating heat exchange loop of this embodiment, no other switching device 220 is required, and it can also have the washing and drying modes or stages at the same time.

[0090] Based on the previous embodiment, in order to facilitate the temperature control in the washing stage and reduce the heat exchange difficulty in the washing stage, the heat pump system 200 includes a first throttling device 270, and the first throttling device 270 is arranged on the flow path between the air cooling device 260 and the second heat exchange device 250; in other embodiments, the first throttling device 270 is arranged on the flow path between the first heat exchange device 230 and the second heat exchange device 250.

[0091] In another embodiment, in order to facilitate the temperature control in the drying stage and reduce the heat exchange difficulty in the washing stage, the heat pump system 200 includes a second throttling device 280, and the second throttling device 280 is arranged on the flow path between the air heating device 240 and the air cooling device 260.

[0092] In other embodiments, the second heat exchange device 250 can also be arranged outside the housing of the dishwasher 10.

[0093] 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, it can be based on the median line of the height of the inner container. Above the median line is the upper part, and below the median line is the lower part. 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.

[0094] 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 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.

[0095] In another embodiment, the air cooling device 260 and the air heating device 240 are arranged on the bottom surface of the inner container.

[0096] 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 using electric energy as the 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.

[0097] Among them, the electric auxiliary heating device 300 is arranged on the flow path between the second heat exchange channel of the first heat exchange device 230 and the spraying assembly 112. In this way, when the heat pump system 200 cannot meet the demand during the washing stage, 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, when the heat pump system 200 cannot meet the demand during the drying stage, 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 one electric auxiliary heating device 300 can be correspondingly heated during both the washing stage and the drying stage.

[0098] Exemplarily, the electric auxiliary heating device 300 generally includes an electric heating element, a control element and a protection element.

[0099] 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 electrical 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.

[0100] 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. 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.

[0101] 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 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 washing chamber and a spray system, wherein the spray system is used to spray washing water into the washing chamber to wash dishes placed in the washing chamber; 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; and A liquid storage device, wherein the second heat exchange device is arranged in the liquid storage device.

2. The dishwasher according to claim 1, 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 a circulating heat exchange loop.

3. The dishwasher according to claim 2, 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.

4. The dishwasher according to claim 1, 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.

5. The dishwasher according to claim 4, 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.

6. The dishwasher according to claim 3 or 5, characterized in that: 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, and the fourth fan is used to supply air to the fourth heat exchange element; The third heat exchange element and the fourth heat exchange element are both provided with heat exchange channels for medium circulation.

7. The dishwasher according to any one of claims 1 to 5, characterized in that The liquid storage device comprises a detachably connected device body and a liquid level indicator, wherein the device body has a liquid storage cavity, the second heat exchange device is arranged in the liquid storage cavity, and the liquid level indicator is used to monitor the liquid level of the liquid storage cavity.

8. The dishwasher according to claim 7, characterized in that The device body is provided with a liquid injection port on its upper end surface, and the liquid injection port is communicated with the liquid storage cavity.

9. The dishwasher according to claim 6, characterized in that The spray system includes a water collection tank, a water pump and a spray assembly; the spray assembly is arranged in the washing chamber and is used to spray washing water into the washing chamber, the water collection tank is connected to the second heat exchange channel, the second heat exchange channel is connected to the spray assembly through a pipeline, and 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 the flow path between the second heat exchange channel and the spray assembly; And / or, the electric auxiliary heating device is arranged in the internal circulation air duct.

Images