Dishwasher

Abstract

The dish-washing machine comprises a dish-washing machine body and a heat pump system, the dish-washing machine body is provided with a heat exchange air duct, a washing chamber, an exhaust outlet and a spraying system, the washing chamber is communicated with the outside through the exhaust outlet, and the heat exchange air duct is communicated with the washing chamber; the heat pump system comprises a compression device, a switching device, a first heat exchange device, a second heat exchange device and a third heat exchange device, and the compression device communicates with the first heat exchange channel and the third heat exchange device through the switching device to form a first circulation loop; the compression device is communicated with the second heat exchange device and the third heat exchange device through the switching device to form a second circulation loop; the second heat exchange channel is communicated with the spraying system; the second heat exchange device is arranged in the heat exchange air duct and used for providing hot air for the washing cavity. The washing and drying efficiency of the dish-washing machine can be improved.

Description

Technical Field

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

[0002] Heat pump dishwashers usually have two modes or stages: washing and drying. After washing, the interior of the dishwasher is filled with humid air with high relative humidity and high temperature and liquid water droplets attached to the surface of the dishes, so it is necessary to enter the drying mode. However, in the related art, heat pump dishwashers have the problem of low washing and drying efficiency. Utility Model Content

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

[0004] To achieve the above-mentioned purpose, the dishwasher proposed by the utility model comprises:

[0005] The dishwasher body comprises a heat exchange duct, a washing chamber, an exhaust port and a spray system, wherein the washing chamber is connected to the outside through the exhaust port, and the heat exchange duct is connected to the washing chamber; the spray system is used to spray washing water into the washing chamber;

[0006] A heat pump system, comprising a compression device, a switching device, a first heat exchange device, a second heat exchange device and a third 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 is connected with the first heat exchange channel and the third heat exchange device via the switching device to form a first circulation loop, and the compression device is connected with the second heat exchange device and the third heat exchange device via the switching device to form a second circulation loop; the second heat exchange channel is connected with the spray system; the second heat exchange device is arranged in the heat exchange air duct to provide hot air to the washing chamber;

[0007] The switching device is used to control the refrigerant discharged from the compression device to pass through the first circulation loop during the washing stage, and to control the refrigerant discharged from the compression device to pass through the second circulation loop during the drying stage.

[0008] In one embodiment, the third heat exchange device is disposed outside the heat exchange air duct and the washing chamber.

[0009] In one embodiment, the dishwasher body includes a first damper, which is movably disposed at the exhaust port. In the washing stage, the first damper closes the exhaust port; in the drying stage, the first damper opens the exhaust port.

[0010] In one embodiment, the dishwasher body further has an air inlet communicated with the outside, and the air inlet is communicated with the heat exchange air duct and / or the washing chamber.

[0011] In one embodiment, the dishwasher body further includes a second air door, which is movably disposed at the air inlet. In the washing stage, the second air door closes the air inlet; in the drying stage, the second air door opens the air inlet.

[0012] In one embodiment, the dishwasher body includes an outer shell, an inner tank and a door body, the inner tank is arranged in the outer shell, the outer shell is provided with a first opening, the door body can be movably provided on the outer shell to open or close the first opening, the washing chamber is defined between the inner tank and the door body, the heat exchange air duct is defined between the outer shell and the inner tank, and the exhaust port is provided on the door body and / or the outer shell.

[0013] In one embodiment, the second heat exchange device comprises a second heat exchange element and a second fan, the second fan is used to supply air to the second heat exchange element, and the air outlet side of the second fan is connected to the washing chamber;

[0014] And / or, the third heat exchange device includes a third heat exchange element and a third fan, the third fan is used to supply air to the third heat exchange element, the outer shell is provided with an air outlet, and the air outlet side of the third fan is connected to the air outlet.

[0015] In one embodiment, the spray system includes a water pump and a spray assembly, the spray assembly is disposed in the washing chamber and is used to spray washing water into the washing chamber, the second heat exchange channel is connected to the spray assembly through a first pipeline, and the water pump is disposed on the first pipeline.

[0016] In one embodiment, the dishwasher further comprises an electric heating device, which is disposed on the first pipeline and is used to heat the washing water in the first pipeline;

[0017] And / or, the electric heating device is arranged in the heat exchange air duct.

[0018] In one embodiment, the switching device includes a first reversing valve, the first reversing valve has a first interface, a second interface and a third interface, the first interface is communicated with the exhaust port of the compression device, the second interface is communicated with the first heat exchange channel, and the third interface is communicated with the second heat exchange device;

[0019] 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.

[0020] In one embodiment, the heat pump system includes a throttling pipeline. In the first circulation loop, the first heat exchange channel and the third heat exchange device are connected through the throttling pipeline. In the second circulation loop, the second heat exchange device and the third heat exchange device are connected through the throttling pipeline. The switching device also includes a first throttling device, which is arranged on the throttling pipeline.

[0021] In one embodiment, the third heat exchange device includes a first sub-heat exchange device and a second sub-heat exchange device, the compression device is connected with the first heat exchange channel and the first sub-heat exchange device via the switching device to form the first circulation loop, and the compression device is connected with the second heat exchange device and the second sub-heat exchange device via the switching device to form the second circulation loop.

[0022] In one embodiment, the switching device further includes a second reversing valve, the second reversing valve having a fourth interface, a fifth interface and a sixth interface, the fourth interface is communicated with the air inlet of the compression device, the fifth interface is communicated with the first sub-heat exchange device, and the sixth interface is communicated with the second sub-heat exchange device;

[0023] In the washing stage, the fourth interface is connected to the fifth interface, and the fourth interface is isolated from the sixth interface; in the drying stage, the fourth interface is connected to the sixth interface, and the fourth interface is isolated from the fifth interface.

[0024] In one embodiment, the switching device also includes a second throttling device and a third throttling device, the second throttling device is arranged in the first circulation loop and is located between the first heat exchange channel and the first sub-heat exchange device, and the third throttling device is arranged in the second circulation loop and is located between the second heat exchange device and the second sub-heat exchange device.

[0025] The dishwasher of the present application includes a dishwasher body and a heat pump system. The dishwasher body has a heat exchange duct, a washing chamber, an exhaust port and a spray system. The washing chamber is connected to the outside through the exhaust port, and the heat exchange duct is connected to the washing chamber, so that the heat exchange duct, the washing chamber and the exhaust port are connected in sequence; the heat pump system includes a compression device, a switching device, a first heat exchange device, a second heat exchange device and a third heat exchange device. The first heat exchange device has a first heat exchange channel and a second heat exchange channel arranged for heat exchange with each other. The compression device is connected to the first heat exchange channel and the third heat exchange device through the switching device to form a first circulation loop, and the second heat exchange channel is connected to the spray system. In this way, in the washing stage, the refrigerant discharged by the compression device passes through the first circulation loop, the refrigerant flows through the first heat exchange channel to condense and release heat, and then flows through the third heat exchange device to evaporate and absorb heat. At this time, the first heat exchange device generates heat, and the washing water in the spray system flows through the second heat exchange channel to absorb the heat released by the refrigerant to produce hot water. The prepared washing hot water is sprayed into the washing chamber to wash the tableware placed in the washing chamber. The compression device is connected with the second heat exchange device and the third heat exchange device through the switching device to form a second circulation loop. The second heat exchange device is arranged in the heat exchange air duct to provide hot air to the washing chamber. In the drying stage, the refrigerant discharged by the compression device passes through the second circulation loop, and the refrigerant flows through the second heat exchange device to condense and release heat, and then flows through the third heat exchange device to evaporate and absorb heat. At this time, the second heat exchange device generates heat, and the air is heated by the second heat exchange device, and then flows into the washing chamber to heat and dry the tableware in the washing chamber, and then is discharged to the outside from the exhaust port.

[0026] It can be seen that the dishwasher of the present application uses independent heat exchange devices to generate heat in the washing stage and the drying stage, so that the dishwasher can use energy more efficiently. Each circulation loop can be responsible for the heat transfer in the washing stage and the drying stage respectively, thereby improving the overall efficiency. In addition, the two relatively independent first heat exchange devices and second heat exchange devices allow the dishwasher to have greater flexibility in the washing and drying process, and can independently control the working state and parameters of each stage as needed to meet different washing and drying requirements. Since the heat pump system has an independent heat exchange device, it can more effectively control the flow of heat and reduce energy waste, which is conducive to reducing the energy consumption of the dishwasher and thus improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1A structural schematic diagram of a first embodiment of a dishwasher provided by the utility model;

[0029] Figure 2 This is a structural schematic diagram of a second embodiment of the dishwasher provided by the utility model.

[0030] Description of Figure Numbers:

[0031] 10. Dishwasher;

[0032] 100, dishwasher body; 110, heat exchange air duct; 120, washing chamber; 130, spray system; 131, water pump; 132, spray assembly; 133, first pipeline; 134, water cup;

[0033] 200, heat pump system; 210, compression device; 220, switching device; 221, first reversing valve; 222, first throttling element; 223, second reversing valve; 224, second throttling element; 225, third throttling element; 230, first heat exchange device; 231, first heat exchange channel; 232, second heat exchange channel; 240, second heat exchange device; 241, second heat exchange element; 242, second fan; 250, third heat exchange device; 251, third heat exchange element; 252, third fan; 253, first sub-heat exchange device; 254, second sub-heat exchange device; 260, throttling pipeline;

[0034] 300. Electric heating device.

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0039] Dishwashers are devices that automatically wash tableware such as bowls, chopsticks, plates, dishes, knives, forks, etc. Fully automatic dishwashers on the market can be divided into two categories: home use and commercial use. Home use fully automatic dishwashers are suitable for families, and they mainly include cabinet type, table type, sink integrated type, and integrated type. Commercial dishwashers can be divided into cabinet type, hood type, basket conveyor type, belt conveyor type, ultrasonic type, etc. according to their structure, which reduces the labor intensity for the cooks in restaurants, hotels, and canteens of government agencies, improves work efficiency, and promotes cleanliness and hygiene.

[0040] The utility model provides a dishwasher, which aims to improve the washing and drying efficiency of the dishwasher. The dishwasher is a heat pump dishwasher, which can be used for home use or commercial use. For ease of understanding and explanation, in the drawings of the specification of the utility model, the solid arrows indicate spaces, slots or holes.

[0041] See also Figure 1 and Figure 2In an embodiment of the utility model, a dishwasher 10 includes a dishwasher body 100 and a heat pump system 200. The dishwasher body 100 has a heat exchange duct 110, a washing chamber 120, an exhaust port and a spray system 130. The washing chamber 120 is connected to the outside through the exhaust port, and the heat exchange duct 110 is connected to the washing chamber 120; the spray system 130 is used to spray washing water into the washing chamber 120; 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 240 and a third heat exchange device 250. The first heat exchange device 230 has a first heat exchange channel 231 and a second heat exchange channel 232 that are arranged for heat exchange with each other. The compression device The device 210 is connected with the first heat exchange channel 231 and the third heat exchange device 250 through the switching device 220 to form a first circulation loop, and the compression device 210 is connected with the second heat exchange device 240 and the third heat exchange device 250 through the switching device 220 to form a second circulation loop; the second heat exchange channel 232 is connected with the spray system 130; the second heat exchange device 240 is arranged in the heat exchange air duct 110 to provide hot air to the washing chamber 120; the switching device 220 is used to control the refrigerant discharged from the compression device 210 to pass through the first circulation loop during the washing stage, and to control the refrigerant discharged from the compression device 210 to pass through the second circulation loop during the drying stage.

[0042] It is understandable that the switching device 220 is used to control the refrigerant discharged from the compression device 210 to pass through the first circulation loop, so that the media in the first heat exchange channel 231 and the second heat exchange channel 232 exchange heat with each other to produce hot water for the spray system 130, and the switching device 220 is also used to control the refrigerant discharged from the compression device 210 to pass through the second circulation loop. The compression device 210 is not limited to a compressor, and the number of compressors can be one, or two, or more, which is not limited here. The refrigerant discharged from the compression device 210, for example, uses chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons and other Freons, or uses hydrofluorocarbons, etc.

[0043] The dishwasher 10 of the present application includes a dishwasher body 100 and a heat pump system 200. The dishwasher body 100 has a heat exchange duct 110, a washing chamber 120, an exhaust port and a spray system 130. The washing chamber 120 is connected to the outside through the exhaust port, and the heat exchange duct 110 is connected to the washing chamber 120, so that the heat exchange duct 110, the washing chamber 120 and the exhaust port are connected in sequence; 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 240 and a third heat exchange device 250. The first heat exchange device 230 has a first heat exchange channel 231 and a second heat exchange channel 232 that are arranged for heat exchange with each other. The compression device 210 is connected to the first heat exchange channel 231 and the third heat exchange device 250 through the switching device 220 to form a first circulation loop, and the second heat exchange channel 232 is connected to the spray system 130. In this arrangement, during the washing stage, the refrigerant discharged from the compression device 210 passes through the first circulation loop, the refrigerant flows through the first heat exchange channel 231 to condense and release heat, and then flows through the third heat exchange device 250 to evaporate and absorb heat. At this time, the first heat exchange device 230 generates heat, and the washing water in the spray system 130 flows through the second heat exchange channel 232 to absorb the heat released by the refrigerant to produce hot water. The obtained washing hot water is sprayed into the washing chamber 120 to clean the tableware placed in the washing chamber 120. The compression device 210 is connected to the second heat exchange device 240 and the third heat exchange device 250 via the switching device 220 to form a second circulation loop. The second heat exchange device 240 is arranged in the heat exchange air duct 110 to provide hot air to the washing chamber 120. In the drying stage, the refrigerant discharged from the compression device 210 passes through the second circulation loop, and the refrigerant flows through the second heat exchange device 240 to condense and release heat, and then flows through the third heat exchange device 250 to evaporate and absorb heat. At this time, the second heat exchange device 240 generates heat, and the air is heated by the second heat exchange device 240, and then flows into the washing chamber 120 to heat and dry the tableware in the washing chamber 120, and then is discharged to the outside from the exhaust port.

[0044] It can be seen that the dishwasher 10 of the present application uses independent heat exchange devices to generate heat in the washing stage and the drying stage, so that the dishwasher 10 can use energy more efficiently, and each circulation loop can be responsible for the heat transfer in the washing stage and the drying stage respectively, thereby improving the overall efficiency; in addition, the two relatively independent first heat exchange devices 230 and second heat exchange devices 240 make the dishwasher 10 more flexible in the washing and drying process, and can independently control the working state and parameters of each stage as needed to meet different washing and drying requirements. Since the heat pump system 200 has an independent heat exchange device, it can more effectively control the flow of heat and reduce energy waste, which is conducive to reducing the energy consumption of the dishwasher 10, thereby improving energy utilization.

[0045] The technical solution of the present application improves the washing and drying efficiency, flexibility and energy utilization of the dishwasher 10 by using independent heat exchange devices to generate heat in the washing stage and the drying stage of the dishwasher 10. This design not only provides a better dishwashing experience, but also helps save energy and reduce maintenance costs.

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

[0047] See also Figure 1 and Figure 2 In an embodiment of the present invention, the dishwasher 10 includes a dishwasher body 100 and a heat pump system 200 .

[0048] The main body 100 of the dishwasher generally includes a shell and a spray system 130. The shell is configured with a washing chamber 120 and a heat exchange duct 110. The shell generally includes an outer shell, an inner tank and a door. The outer shell is provided with a first opening. The inner tank is provided in the outer shell. The door can be movably provided on the outer shell to open or close the first opening. The washing chamber 120 is defined between the inner tank and the door, and the heat exchange duct 110 is defined between the outer shell and the inner tank. The washing chamber 120 has an exhaust port connected to the external environment of the shell. The heat exchange duct 110 is connected to the washing chamber 120, that is, the heat exchange duct 110, the washing chamber 120 and the exhaust port are connected in sequence. In some embodiments, the dishwasher 10 may be a structure in which the door and the inner tank are integrated into one body.

[0049] Regarding the spray system 130, the spray system 130 is used to spray washing water into the washing chamber 120 to clean the tableware placed in the washing chamber 120. The spray system 130 generally includes but is not limited to a water pump 131, a spray assembly 132, a water cup 134, a pipeline assembly, a controller, a filter, a water level sensor, and a drainage device. Among them, the water pump 131 is one of the key components of the spray system 130 of the dishwasher 10, which is responsible for delivering the cleaning liquid used to clean the tableware to the spray arm or nozzle. The water pump 131 is usually driven by an electric motor to generate sufficient water pressure and flow to ensure the washing effect. The spray assembly 132 generally includes a spray arm and / or a nozzle. The spray assembly 132 is the outlet for the spray of the cleaning liquid in the spray system 130 of the dishwasher 10. The spray assembly 132 is generally located inside the dishwasher 10, and the spray water is evenly sprayed onto the surfaces of dishes, tableware, etc. by rotating or directional spraying to clean the tableware. The pipe assembly is responsible for delivering water to the spray arm and / or nozzle and ensuring that the water flows smoothly to the target area. The pipe assembly is usually made of corrosion-resistant materials, such as stainless steel or plastic. The controller of the spray assembly 132 is used to control the start and stop, spray time, spray mode and other parameters of the spray assembly 132. The controller of the spray assembly 132 is usually part of the electronic control panel of the dishwasher 10. The user can set the corresponding parameters through the buttons on the panel or the touch screen. The filter is used to filter impurities and residues in the washing water to prevent the nozzles and pipes of the spray system 130 from being blocked, which is conducive to maintaining the normal operation and cleaning effect of the spray system 130. The water level sensor is used to monitor the internal water level of the water cup 134 of the dishwasher 10 is too high, to ensure the stable operation of the water pump 131, to prevent the water level from being too high during the drying stage and drying period. The drainage device is used to discharge the sewage generated during the cleaning process from the dishwasher 10 to maintain a clean environment. The drainage device usually includes components such as a drainage pipe, a drainage pump 131 and a drainage filter.

[0050] In one embodiment, the spray system 130 includes a water cup 134, which is disposed at the bottom of the inner tank. On the one hand, the water cup 134 is used to store washing water for rinsing tableware. The washing water is pumped from the water cup 134 by a water pump 131 and transported to the spray assembly 132. On the other hand, the water cup 134 is also used to collect sewage generated after washing the tableware. The sewage is collected by the water cup 134 and discharged through a drainage pipe.

[0051] Regarding the first heat exchange device 230, the first heat exchange device 230 has a first heat exchange channel 231 and a second heat exchange channel 232, wherein the refrigerant discharged from the compression device 210 can flow through the first heat exchange channel 231 to condense and release heat, and the second heat exchange channel 232 is connected to the spray system 130, and the first heat exchange channel 231 and the second heat exchange channel 232 are mutually heat exchanged; the specific shapes of the first heat exchange channel 231 and the second heat exchange channel 232 are not limited, for example, but not limited to straight tube, curved tube, spiral, etc. The first heat exchange device 230 includes but is not limited to a shell and tube heat exchanger, a plate heat exchanger, a spiral heat exchanger, a shell and tube heat exchanger, etc.

[0052] The shell-and-tube heat exchanger includes an inner tube and an outer shell. The heat transfer medium (generally liquid or steam) passes through the inner tube to transfer heat to another medium (which can be liquid, gas or steam, and liquid in this embodiment), and the outer shell is sleeved outside the inner tube. The inner tube forms the first heat exchange channel 231, and the second heat exchange channel 232 is formed between the inner tube and the outer shell, or the inner tube forms the second heat exchange channel 232, and the first heat exchange channel 231 is formed between the inner tube and the outer shell. Preferably, the inner tube forms the first heat exchange channel 231, and the second heat exchange channel 232 is formed between the inner tube and the outer shell.

[0053] The plate heat exchanger is composed of a plurality of plates with gaps between the plates, through which a first heat exchange channel 231 and a second heat exchange channel 232 can be formed, so that heat can be transferred between the two flowing media. The advantages of the plate heat exchanger include compact design, efficient heat transfer, and easy maintenance and cleaning.

[0054] Spiral plate heat exchanger achieves efficient heat transfer through multi-layer spiral plate structure. This heat exchanger combines the advantages of plate heat exchanger and shell and tube heat exchanger.

[0055] The spiral heat exchanger can effectively transfer the heat of one medium to another medium through a spiral pipe structure. The two mediums mentioned above refer to the refrigerant and water in this embodiment.

[0056] Regarding the second heat exchange device 240, the second heat exchange device 240 is arranged in the heat exchange air duct 110. Thus, in the drying mode or drying stage, the air in the heat exchange air duct 110 is heated by the second heat exchange device 240 and then flows through the washing chamber 120, heating and drying the dishes in the washing chamber 120, and then flows out from the exhaust port. Among them, the second heat exchange device 240 is mainly used to heat the air. The second heat exchange device 240 includes a heat sink, a fan, a condenser, etc., and the air is heated by forced convection of the fan. For example, the second heat exchange device 240 includes a second heat exchange element 241 and a second fan 242. The second fan 242 is used to supply air to the second heat exchange element 241. The second heat exchange element 241 is provided with a heat exchange channel for medium circulation. In this embodiment, the second heat exchange device 240 can also be an air spiral heat exchanger, which 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.

[0057] Regarding the third heat exchange device 250, in the present embodiment, the third heat exchange device 250 is used to exchange heat with the air, usually to absorb heat from the air. The third heat exchange device 250 includes a heat sink, a fan, a heat pipe, etc., and cools the gas by forced convection. For example, the third heat exchange device 250 includes a third heat exchange element 251 and a third fan 252. The third fan 252 is used to supply air to the third heat exchange element 251. The third heat exchange element 251 is provided with a heat exchange channel for medium circulation.

[0058] In one embodiment, the third heat exchange device 250 is disposed outside the heat exchange air duct 110 and the washing chamber 120. This arrangement facilitates the installation of the third heat exchange device 250, and there is no need to dispose the third heat exchange device 250 in the heat exchange air duct 110 to occupy a large space in the heat exchange air duct 110, thereby helping to reduce the volume of the heat exchange air duct 110, making it easy to form the heat exchange air duct 110 in the dishwasher 10, which is conducive to optimizing the structural arrangement in the dishwasher 10. In addition, the third heat exchange device 250 is disposed outside the washing chamber 120, which is conducive to ensuring that the washing chamber 120 has sufficient capacity space, and there is no specific requirement for the installation position of the third heat exchange device 250, and it can be installed as needed, which improves the convenience of installing the third heat exchange device 250. In this embodiment, the third heat exchange device 250 is disposed on the chassis in the outer shell of the dishwasher 10.

[0059] In one embodiment, the dishwasher body 100 includes a first damper (not shown), which is movably disposed at the exhaust port. In the washing stage, the first damper closes the exhaust port; in the drying stage, the first damper opens the exhaust port. It is understandable that the manner in which the first damper is movably disposed at the exhaust port is not limited. For example, the first damper is rotatably disposed at the exhaust port, or the first damper is slidably disposed at the exhaust port. When the dishwasher 10 washes dishes in the washing stage, the first damper closes the exhaust port to prevent washing water from splashing out of the exhaust port; when the dishwasher 10 heats and dries dishes in the drying stage, the first damper opens the exhaust port so that the air in the washing chamber 120 after drying the dishes can be discharged from the exhaust port to form circulating air, which is conducive to improving the drying speed.

[0060] In one embodiment, the dishwasher body 100 further has an air inlet connected to the outside, and the air inlet is connected to the heat exchange air duct 110 and / or the washing chamber 120. It is understood that in the drying stage, the air outside the dishwasher 10 enters from the air inlet, and the air inlet can be connected to the heat exchange air duct 110, or the air inlet can also be connected to the washing chamber 120, or the air inlet is connected to both the heat exchange air duct 110 and the washing chamber 120, and it is only necessary that the air can flow through the heat exchange air duct 110 and the washing chamber 120 and then be discharged from the exhaust port. It is understood that there are many ways to form the air inlet, for example but not limited to: the air inlet can be provided on the door body; or the air inlet is formed between the door body and the shell; or the air inlet is provided on the shell; or in the drying stage, the door body is opened to form the air inlet. By forming the air inlet, during the drying stage, it is helpful to improve the smoothness of the air flowing out of the exhaust port after passing through the heat exchange air duct 110 and the washing chamber 120.

[0061] In one embodiment, the dishwasher body 100 further includes a second damper (not shown), which is movably disposed at the air inlet. In the washing stage, the second damper closes the air inlet; in the drying stage, the second damper opens the air inlet. It is understandable that the air inlet in this solution may be disposed on the door body; or, the air inlet is disposed on the outer shell. By arranging the second damper at the air inlet, when the dishwasher 10 washes dishes in the washing stage, the second damper closes the air inlet to prevent washing water from splashing out of the air inlet; when the dishwasher 10 heats and dries dishes in the drying stage, the second damper opens the air inlet, so that the air can smoothly flow through the heat exchange air duct 110 and the washing chamber 120 and then flow out from the exhaust port, which is conducive to increasing the drying speed.

[0062] In one embodiment, the dishwasher body 100 includes an outer shell, an inner tank and a door body, the inner tank is arranged in the outer shell, the outer shell is provided with a first opening, the door body can be movably provided on the outer shell to open or close the first opening, the washing chamber 120 is defined between the inner tank and the door body, the heat exchange air duct 110 is defined between the outer shell and the inner tank, and the exhaust port is provided on the door body and / or the outer shell.

[0063] It is understandable that when the exhaust port is provided on the door body, the exhaust port and the door body are provided on the same side of the housing, that is, the exhaust port is provided on the front side (the side facing the user), so that the exhaust port is prevented from being blocked or the airflow is intercepted when the dishwasher 10 is placed against the wall, thereby making the exhaust smoother. In addition, the specific position of the exhaust port on the housing is not limited, and it is only necessary that the air in the washing chamber 120 can be discharged from the exhaust port. By providing the exhaust port, the air in the washing chamber 120 can exchange heat with the air outside the dishwasher 10, which is conducive to improving the heat exchange efficiency of the second heat exchange device 240.

[0064] See also Figure 1 In one embodiment, the second heat exchange device 240 includes a second heat exchange element 241 and a second fan 242, the second fan 242 is used to supply air to the second heat exchange element 241, and the air outlet side of the second fan 242 is connected to the washing chamber 120. It can be understood that the second heat exchange element 241 is provided with a heat exchange channel for the circulation of the refrigerant, and by providing the second fan 242, the heat exchange efficiency of the second heat exchange device 240 can be accelerated, thereby improving the drying speed of the dishes.

[0065] See also Figure 1 In one embodiment, the third heat exchange device 250 includes a third heat exchange element 251 and a third fan 252. The third fan 252 is used to supply air to the third heat exchange element 251. The housing is provided with an air outlet, and the air outlet side of the third fan 252 is connected to the air outlet. It can be understood that the third heat exchange element 251 is provided with a heat exchange channel for the circulation of refrigerant. By providing the third fan 252, the heat exchange efficiency of the third heat exchange device 250 can be accelerated, and at the same time, the third heat exchange element 251 can be prevented from frosting during the drying stage.

[0066] In one embodiment, the third heat exchange device 250 may also be disposed outside the housing of the dishwasher 10 .

[0067] In one embodiment, the second heat exchange device 240 and the third heat exchange device 250 are disposed below the inner tank.

[0068] In one embodiment, the air outlet is arranged at the upper part of the inner container, and the air inlet is arranged at the lower part of the inner container. In this way, the air inlet is arranged below the air outlet. The middle line of the inner container height can be used as a standard, and the part above the middle line is the upper part, and the part below the middle line is the lower part. In addition, the air inlet and the air outlet can also be arranged on the same side of the inner container.

[0069] See also Figure 1 and Figure 2 In one embodiment, the spray system 130 includes a water pump 131 and a spray assembly 132. The spray assembly 132 is disposed in the washing chamber 120 and is used to spray washing water into the washing chamber 120. The second heat exchange channel 232 is connected to the spray assembly 132 through a first pipeline 133. The water pump 131 is disposed on the first pipeline 133.

[0070] It can be understood that the water pump 131 is arranged on the first pipeline 133, and the spray system 130 further includes a water cup 134, which is arranged at the bottom of the washing chamber 120. The water cup 134, the second heat exchange channel 232, the water pump 131 and the spray assembly 132 are connected in sequence, so that the water pump 131 can transport the washing water in the water cup 134 to the spray assembly 132, and the spray assembly 132 then sprays the washing water into the washing chamber 120 to clean the tableware placed in the washing chamber 120. By providing the water pump 131, it is ensured that the spray assembly 132 can generate sufficient water pressure and flow to ensure the washing effect.

[0071] In one embodiment, the dishwasher 10 further includes an electric heating device 300, which is disposed on the first pipeline 133 and is used to heat the washing water in the first pipeline 133. It is understood that the electric heating device 300 is an auxiliary heating device that uses electric energy as an energy source. It converts electric energy into heat energy and mainly provides additional heat when the heat pump system 200 cannot meet the demand or requires additional heating. When the electric heating device 300 is disposed on the first pipeline 133, the electric heating device 300 is used to heat the washing water in the first pipeline 133. During the washing stage, if the heat pump system 200 cannot meet the demand, the electric heating device 300 can be started.

[0072] In one embodiment, the electric heating device 300 is disposed in the heat exchange air duct 110. In this way, during the drying stage, if the heat pump system 200 cannot meet the demand, the electric heating device 300 can also be started.

[0073] It is understandable that the heat exchange air duct 110 and the first pipe 133 between the second heat exchange channel 232 and the spray assembly 132 are both provided with an electric heating device 300, or an electric heating device 300 can be heated accordingly in both the washing stage and the drying stage. The electric heating device 300 generally includes an electric heating element, a control element and a protection element. The electric heating element is generally an electric heating wire, an electric heating tube or an electric heating plate, and the electric heating element is a key component for converting electrical energy into thermal 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, and the temperature controller is generally integrated with other control elements into a control device. The protection element is used to ensure the safe operation of the electric heating device 300 to prevent overheating or circuit failure, and generally includes an overheating protector and a leakage protector. When the dishwasher 10 requires additional heating, the control device receives a signal and heats the electric heating element. The electric heating element generates heat energy under the action of the 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 fault occurs, the protection element will automatically disconnect the power supply to ensure safe operation.

[0074] In this embodiment, the switching device 220 is used to control the refrigerant discharged from the compression device 210 to pass through the first circulation loop, so that the media in the first heat exchange channel 231 and the second heat exchange channel 232 exchange heat with each other to produce hot water for the spray system 130, and the switching device 220 is also used to control the refrigerant discharged from the compression device 210 to pass through the second circulation heat exchange loop.

[0075] See also Figure 1 In one embodiment, the switching device 220 includes a first reversing valve 221, the first reversing valve 221 has a first interface, a second interface and a third interface, the first interface is connected to the exhaust port of the compression device 210, the second interface is connected to the first heat exchange channel 231, and the third interface is connected to the second heat exchange 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.

[0076] It is understandable that the first reversing valve 221 can be a multi-way valve such as a three-way valve, or a control pipeline composed of multiple stop valves or ordinary on-off valves. The control pipeline composed of multiple stop valves or on-off valves has the advantage of low noise. The control pipeline provided with a three-way valve has the advantage of occupying a small internal space of the dishwasher 10. In this solution, the first reversing valve 221 is a three-way valve, which is used to control the flow direction of the fluid between an inlet and two outlets or to distribute the flow direction of the fluid. The three-way valve includes a valve body, a valve core and a seal. The valve body has an inlet and two outlets, forming a "Y"-shaped or "T"-shaped structure; the valve core is a key component for controlling the flow of the fluid, which is usually located inside the valve body and can be moved to change the channel between the inlet and the outlet. The movement of the valve core can be controlled by manual operation or by an electric, pneumatic or hydraulic actuator. The seal is used to ensure the sealing of the valve core 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 for installation in the pipeline system. In addition, in one embodiment, the three-way valve is electrically connected to the actuator to automatically control the movement of the valve core to achieve remote or automatic control, and the actuator can be controlled manually, electrically, pneumatically or hydraulically. In this solution, the first reversing valve 221 includes a three-way valve, and the three-way valve can simply and effectively switch the flow direction of the refrigerant, so that the heat pump system 200 has a simple structure, occupies less space, and is easy to assemble.

[0077] It is understandable that the heat pump system 200 includes a throttling device, wherein the throttling device mainly has the following functions:

[0078] Adjusting the refrigerant flow: The throttling device can throttle and reduce the pressure of the high-pressure liquid 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.

[0079] Reduce the difficulty of heat exchange: For example, during the heat exchange process, the throttling device will cause the refrigerant liquid to flow through a small hole, forming a local contraction, thereby increasing the flow rate and reducing the static pressure. This pressure difference will make the refrigerant easier to evaporate in the evaporator, reducing the difficulty of heat exchange and improving the heat exchange efficiency.

[0080] Achieve temperature control: The throttling device can also be used as an important part of temperature control. When the system needs a colder temperature, the throttling device can be used to reduce the flow of the refrigerant, thereby reducing the evaporation temperature. On the contrary, when the system needs a warmer temperature, the throttling device can be used to increase the flow of the refrigerant, thereby increasing the evaporation temperature.

[0081] See also Figure 1In one embodiment, the heat pump system 200 includes a throttling pipe 260. In the first circulation loop, the first heat exchange channel 231 and the third heat exchange device 250 are connected through the throttling pipe 260. In the second circulation loop, the second heat exchange device 240 and the third heat exchange device 250 are connected through the throttling pipe 260. The switching device 220 also includes a first throttling device 222, and the first throttling device 222 is arranged on the throttling pipe 260.

[0082] It is understandable that the first throttle 222 can be an electronic expansion valve. In the washing stage, the refrigerant discharged from the compression device 210 flows along the first circulation loop, the refrigerant flows through the first heat exchange channel 231 to condense and release heat, then flows through the first throttle 222 to throttle and flows through the third heat exchange device 250 to evaporate and absorb heat, and then returns to the compression device 210. In the drying stage, the refrigerant discharged from the compression device 210 flows along the second circulation loop, the refrigerant flows through the second heat exchange device 240 to condense and release heat, then flows through the first throttle 222 to throttle and flows through the third heat exchange device 250 to evaporate and absorb heat, and then returns to the compression device 210. It can be seen that the first throttle 222 of this solution can be throttled in multiple working stages, that is, the first throttle 222 can control the flow speed and flow rate of the refrigerant, adjust the evaporation temperature and pressure, and thus control the heat exchange effect of the heat pump system 200.

[0083] See also Figure 2 In another embodiment, the third heat exchange device 250 includes a first sub-heat exchange device 253 and a second sub-heat exchange device 254, the compression device 210 is connected with the first heat exchange channel 231 and the first sub-heat exchange device 253 via the switching device 220 to form the first circulation loop, and the compression device 210 is connected with the second heat exchange device 240 and the second sub-heat exchange device 254 via the switching device 220 to form the second circulation loop.

[0084] It can be understood that the first sub-heat exchange device 253 and the second sub-heat exchange device 254 are independent of each other, so that the first circulation loop and the second circulation loop are independent circulation loops, and the washing stage and the drying stage of the dishwasher 10 each use independent heat exchange components. The two circulation loops can be responsible for the heat transfer in the washing stage and the drying stage respectively, thereby improving the overall efficiency. In addition, the two relatively independent circulation loops allow the dishwasher 10 to have greater flexibility in the washing and drying processes, and the working state and parameters of each circulation loop can be independently controlled as needed to meet different washing and drying requirements. In addition, the structure of the first sub-heat exchange device 253 and the second sub-heat exchange device 254 is the same as the structure of the second heat exchange device 240, mainly in different locations, so as to achieve the difference between cooling and heating, which will not be repeated here.

[0085] It can be seen that this embodiment improves the washing and drying efficiency, flexibility and energy utilization of the dishwasher 10 by using independent heat exchange components in the washing stage and the drying stage of the dishwasher 10, while also helping to save energy and reduce maintenance costs.

[0086] See also Figure 2 In another embodiment, the switching device 220 also includes a second reversing valve 223, the second reversing valve 223 has a fourth interface, a fifth interface and a sixth interface, the fourth interface is connected to the air inlet of the compression device 210, the fifth interface is connected to the first sub-heat exchange device 253, and the sixth interface is connected to the second sub-heat exchange device 254; in the washing stage, the fourth interface is connected to the fifth interface, and the fourth interface is isolated from the sixth interface; in the drying stage, the fourth interface is connected to the sixth interface, and the fourth interface is isolated from the fifth interface. It can be understood that the structure of the second reversing valve 223 can be the same as that of the first reversing valve 221, and the details are not repeated here. The second reversing valve 223 in this scheme includes a three-way valve. The provision of a three-way valve can simply and effectively switch the flow direction of the refrigerant, so that the heat pump system 200 has a simple structure, occupies less space, and is easy to assemble.

[0087] See also Figure 2 In another embodiment, the switching device 220 also includes a second throttle 224 and a third throttle 225, the second throttle 224 is arranged in the first circulation loop and is located between the first heat exchange channel 231 and the first sub-heat exchange device 253, and the third throttle 225 is arranged in the second circulation loop and is located between the second heat exchange device 240 and the second sub-heat exchange device 254.

[0088] It is understandable that the structures of the second throttle 224 and the third throttle 225 can be the same as the first throttle 222, and will not be described one by one here. In this embodiment, the second throttle 224 is provided to facilitate temperature control in the washing stage and reduce the difficulty of heat exchange in the washing stage; the third throttle 225 is provided to facilitate temperature control in the drying stage and reduce the difficulty of heat exchange in the drying stage. In other words, the second throttle 224 of this solution throttles the refrigerant in the washing stage, and the third throttle 225 throttles the refrigerant in the drying stage. The second throttle 224 and the third throttle 225 are independent of each other, which is conducive to improving the washing and drying efficiency of the dishwasher 10.

[0089] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dishwasher, characterized in that: include: The dishwasher body comprises a heat exchange duct, a washing chamber, an exhaust port and a spray system, wherein the washing chamber is connected to the outside through the exhaust port, and the heat exchange duct is connected to the washing chamber; the spray system is used to spray washing water into the washing chamber; A heat pump system, comprising a compression device, a switching device, a first heat exchange device, a second heat exchange device and a third 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 is connected with the first heat exchange channel and the third heat exchange device via the switching device to form a first circulation loop, and the compression device is connected with the second heat exchange device and the third heat exchange device via the switching device to form a second circulation loop; the second heat exchange channel is connected with the spray system; the second heat exchange device is arranged in the heat exchange air duct to provide hot air to the washing chamber; The switching device is used to control the refrigerant discharged from the compression device to pass through the first circulation loop during the washing stage, and to control the refrigerant discharged from the compression device to pass through the second circulation loop during the drying stage.

2. The dishwasher according to claim 1, characterized in that The third heat exchange device is arranged outside the heat exchange air duct and the washing chamber.

3. The dishwasher according to claim 1, characterized in that The dishwasher body includes a first damper, which is movably disposed at the exhaust port. In the washing stage, the first damper closes the exhaust port; in the drying stage, the first damper opens the exhaust port.

4. The dishwasher according to claim 1, characterized in that The dishwasher body further comprises an air inlet communicating with the outside, and the air inlet is communicated with the heat exchange air duct and / or the washing chamber.

5. The dishwasher according to claim 4, characterized in that The dishwasher body further comprises a second air door, which is movably arranged at the air inlet. In the washing stage, the second air door closes the air inlet; in the drying stage, the second air door opens the air inlet.

6. The dishwasher according to claim 1, characterized in that The dishwasher body includes an outer shell, an inner tank and a door body, the inner tank is arranged in the outer shell, the outer shell is provided with a first opening, the door body can be movably arranged on the outer shell to open or close the first opening, the washing chamber is defined between the inner tank and the door body, the heat exchange air duct is defined between the outer shell and the inner tank, and the exhaust port is provided on the door body and / or the outer shell.

7. The dishwasher according to claim 6, characterized in that The second heat exchange device comprises a second heat exchange element and a second fan, the second fan is used to supply air to the second heat exchange element, and the air outlet side of the second fan is connected to the washing chamber; And / or, the third heat exchange device includes a third heat exchange element and a third fan, the third fan is used to supply air to the third heat exchange element, the outer shell is provided with an air outlet, and the air outlet side of the third fan is connected to the air outlet.

8. The dishwasher according to claim 1, characterized in that The spray system includes a water pump and a spray component. The spray component is arranged in the washing chamber and is used to spray washing water into the washing chamber. The second heat exchange channel is connected to the spray component through a first pipeline. The water pump is arranged on the first pipeline.

9. The dishwasher according to claim 8, characterized in that The dishwasher further comprises an electric heating device, which is arranged on the first pipeline and is used to heat the washing water in the first pipeline; And / or, the electric heating device is arranged in the heat exchange air duct.

10. The dishwasher according to any one of claims 1 to 9, characterized in that The switching device comprises a first reversing valve, the first reversing valve having a first interface, a second interface and a third interface, the first interface is communicated with the exhaust port of the compression device, the second interface is communicated with the first heat exchange channel, and the third interface is communicated with the second heat exchange device; 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.

11. The dishwasher according to claim 10, characterized in that The heat pump system includes a throttling pipeline. In the first circulation loop, the first heat exchange channel and the third heat exchange device are connected through the throttling pipeline. In the second circulation loop, the second heat exchange device and the third heat exchange device are connected through the throttling pipeline. The switching device also includes a first throttling device, which is arranged on the throttling pipeline.

12. The dishwasher according to claim 10, characterized in that The third heat exchange device includes a first sub-heat exchange device and a second sub-heat exchange device. The compression device is connected with the first heat exchange channel and the first sub-heat exchange device via the switching device to form the first circulation loop. The compression device is connected with the second heat exchange device and the second sub-heat exchange device via the switching device to form the second circulation loop.

13. The dishwasher according to claim 12, characterized in that The switching device further comprises a second reversing valve, the second reversing valve having a fourth interface, a fifth interface and a sixth interface, the fourth interface being communicated with the air inlet of the compression device, the fifth interface being communicated with the first sub-heat exchange device, and the sixth interface being communicated with the second sub-heat exchange device; In the washing stage, the fourth interface is connected to the fifth interface, and the fourth interface is isolated from the sixth interface; in the drying stage, the fourth interface is connected to the sixth interface, and the fourth interface is isolated from the fifth interface.

14. The dishwasher according to claim 12, characterized in that The switching device also includes a second throttling member and a third throttling member, the second throttling member is arranged in the first circulation loop and is located between the first heat exchange channel and the first sub-heat exchange device, and the third throttling member is arranged in the second circulation loop and is located between the second heat exchange device and the second sub-heat exchange device.

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