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 first heat exchange device, a second heat exchange device and a third heat exchange device, the first heat exchange device is provided with a first heat exchange channel and a second heat exchange channel which are arranged in a mutual heat exchange mode, and the compression device, the first heat exchange channel, the second heat exchange device and the third heat exchange device are sequentially communicated to form a circulation heat exchange loop. The second heat exchange channel is communicated with the spraying system, and the second heat exchange channel is used for allowing washing water to flow through so as to exchange heat with the refrigerant flowing through the first heat exchange channel; the second heat exchange device is arranged in the heat exchange air duct and used for providing hot air for the washing cavity in the drying stage. 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 includes a compression 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, and the compression device, the first heat exchange channel, the second heat exchange device and the third heat exchange device are connected in sequence to form a circulating heat exchange loop; the second heat exchange channel is connected to the spray system, and the second heat exchange channel is used for washing water to flow through so as to exchange heat with the refrigerant flowing through the first heat exchange channel; the second heat exchange device is arranged in the heat exchange air duct to provide hot air to the washing chamber during the drying stage.

[0007] In one embodiment, the first heat exchange device includes a first heat exchange member, which is a flexible member and has the first heat exchange channel and the second heat exchange channel. The dishwasher body also has an installation gap, and the first heat exchange member is arranged in the installation gap.

[0008] In one embodiment, the spray system includes a spray assembly and a water cup, the second heat exchange channel connects the water cup and the spray assembly to heat the washing water discharged from the water cup to the spray assembly, the dishwasher body includes an outer shell, the installation gap is formed between the outer shell and the water cup, and the first heat exchange element is arranged on one side of the water cup; or, the first heat exchange element is wrapped around the circumference of the water cup.

[0009] In one embodiment, the first heat exchange member includes an outer tube and an inner tube, the outer tube and the inner tube are flexible tubes, the inner tube forms the first heat exchange channel, and the second heat exchange channel is formed between the outer tube and the inner tube; or, the inner tube forms the second heat exchange channel, and the first heat exchange channel is formed between the outer tube and the inner tube.

[0010] In one embodiment, the third heat exchange device is disposed outside the heat exchange air duct and the washing chamber.

[0011] In one embodiment, the dishwasher body comprises a first damper, and the first damper is movably disposed at the air outlet;

[0012] The first air door is used to close the exhaust port during the washing stage and to open the exhaust port during the drying stage.

[0013] 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.

[0014] In one embodiment, the dishwasher body further comprises a second air door, and the second air door is movably disposed at the air inlet;

[0015] The second air door is used to close the air inlet during the washing stage and to open the air inlet during the drying stage.

[0016] 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.

[0017] 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;

[0018] 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.

[0019] In one embodiment, the heat pump system further comprises a throttling device, which is disposed in the circulating heat exchange loop and located between the second heat exchange device and the third heat exchange device.

[0020] 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.

[0021] 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;

[0022] And / or, the electric heating device is arranged in the heat exchange air duct.

[0023] 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 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, the first heat exchange channel, the second heat exchange device and the third heat exchange device are connected in sequence to form a circulating heat exchange loop. The second heat exchange channel is connected to the spray system. With this arrangement, when the dishwasher is in the washing stage, the refrigerant discharged by the compression device passes through the circulating heat exchange loop. The refrigerant flows through the first heat exchange channel to condense and release 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 clean the tableware placed in the washing chamber; and 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. That is to say, when the dishwasher is in the drying stage, the refrigerant discharged by the compression device passes through the circulating heat exchange circuit, and the refrigerant flows through the second heat exchange device to condense and release 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.

[0024] It can be seen that the dishwasher of the present application uses different heat exchange devices to generate heat in the washing stage and the drying stage, so that the dishwasher can use energy more efficiently. Different heat exchange devices are responsible for heat transfer in the washing stage and the drying stage respectively, thereby improving the overall efficiency; in addition, the two different 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 different heat exchange devices, it can more effectively control the flow of heat and reduce energy waste, which is conducive to reducing the energy consumption of the dishwasher, thereby improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

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

[0027] Figure 2 This is a structural schematic diagram of another embodiment of the dishwasher provided by the utility model.

[0028] Description of Figure Numbers:

[0029] 10. Dishwasher;

[0030] 100, dishwasher body; 110, heat exchange air duct; 120, washing chamber; 130, spray system; 131, spray assembly; 132, water cup; 133, water pump; 134, first pipeline;

[0031] 200, heat pump system; 210, compression device; 220, first heat exchange device; 221, first heat exchange channel; 222, second heat exchange channel; 230, second heat exchange device; 231, second heat exchange element; 232, second fan; 240, third heat exchange device; 241, third heat exchange element; 242, third fan; 250, throttling device;

[0032] 300. Electric heating device.

[0033] 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

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] See also Figure 1 and Figure 2In an embodiment of the present application, 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 first heat exchange device 220, a second heat exchange device 230 and a third heat exchange device 240. The first heat exchange device 220 A first heat exchange channel 221 and a second heat exchange channel 222 are provided for heat exchange with each other. The compression device 210, the first heat exchange channel 221, the second heat exchange device 230 and the third heat exchange device 240 are connected in sequence to form a circulating heat exchange loop; the second heat exchange channel 222 is connected to the spray system 130, and the second heat exchange channel 222 is used for washing water to flow through so as to exchange heat with the refrigerant flowing through the first heat exchange channel 221; the second heat exchange device 230 is arranged in the heat exchange air duct 110 to provide hot air to the washing chamber 120 during the drying stage.

[0039] It is understandable that the refrigerant discharged from the compression device 210 passes through the circulating heat exchange loop so that the media in the first heat exchange channel 221 and the second heat exchange channel 222 exchange heat with each other to produce hot water for the spray system 130. The compression device 210 is not limited to a compressor, and the number of compressors can be one, 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.

[0040] 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 first heat exchange device 220, a second heat exchange device 230 and a third heat exchange device 240. The first heat exchange device 220 has a first heat exchange channel 221 and a second heat exchange channel 222 arranged for heat exchange with each other. The compression device 210, the first heat exchange channel 221, the second heat exchange device 230 and the third heat exchange device 240 are connected in sequence to form a circulating heat exchange loop. The second heat exchange channel 222 is connected to the spray system 130. In this way, when the dishwasher 10 is in the washing stage, the compression device 210, the first heat exchange channel 221, the second heat exchange device 230 and the third heat exchange device 240 are connected in sequence to form a circulating heat exchange loop. The refrigerant discharged from the compression device 210 passes through the circulating heat exchange loop, and the refrigerant flows through the first heat exchange channel 221 to condense and release heat. At this time, the first heat exchange device 220 generates heat, and the washing water in the spray system 130 flows through the second heat exchange channel 222 to absorb the heat released by the refrigerant to make hot water. The prepared washing hot water is sprayed to the washing chamber 120 to clean the tableware placed in the washing chamber 120; and the second heat exchange device 230 is arranged in the heat exchange air duct 110 to provide hot air to the washing chamber 120 in the drying stage. That is to say, when the dishwasher 10 is in the drying stage, the refrigerant discharged from the compression device 210 passes through the circulating heat exchange loop, and the refrigerant flows through the second heat exchange device 230 to condense and release heat. At this time, the second heat exchange device 230 generates heat, and the air is heated by the second heat exchange device 230, and then flows into the washing chamber 120 to heat and dry the tableware in the washing chamber 120, and then discharged from the exhaust port.

[0041] It can be seen that the dishwasher 10 of the present application uses different heat exchange devices to generate heat in the washing stage and the drying stage, so that the dishwasher 10 can use energy more efficiently. Different heat exchange devices are responsible for heat transfer in the washing stage and the drying stage respectively, thereby improving the overall efficiency; in addition, the two different first heat exchange devices 220 and the second heat exchange device 230 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 different heat exchange devices, 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.

[0042] The dishwasher 10 has a washing stage and a drying stage. The technical solution of the present application uses different heat exchange devices to generate heat in the washing stage and the drying stage of the dishwasher 10, thereby improving the washing and drying efficiency, flexibility and energy utilization of the dishwasher 10. This design not only provides a better dishwashing experience, but also helps save energy and reduce maintenance costs.

[0043] The specific structure of the dishwasher 10 will be described in detail below.

[0044] See also Figure 1 and Figure 2 In an embodiment of the present application, the dishwasher 10 includes a dishwasher body 100 and a heat pump system 200. The dishwasher body 100 generally includes a shell and a spray system 130, the shell constructs a washing chamber 120 and a heat exchange air duct 110, the shell generally includes an outer shell, an inner tank and a door body, the outer shell is provided with a first opening, the inner tank is provided in the outer shell, and 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, and the heat exchange air 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, and the heat exchange air duct 110 is connected to the washing chamber 120, that is, the heat exchange air 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 body and the inner tank are integrated into one body.

[0045] 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 133, a spray assembly 131, a water cup 132, a pipeline assembly, a controller, a filter, a water level sensor, and a drainage device. Among them, the water pump 133 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 133 is usually driven by an electric motor to generate sufficient water pressure and flow to ensure the washing effect. The spray assembly 131 generally includes a spray arm and / or a nozzle. The spray assembly 131 is the outlet for the spray of the cleaning liquid in the spray system 130 of the dishwasher 10. The spray assembly 131 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 131 is used to control the start and stop, spray time, spray mode and other parameters of the spray assembly 131. The controller of the spray assembly 131 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 132 of the dishwasher 10 to ensure the stable operation of the water pump 133 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 133 and a drainage filter.

[0046] In one embodiment, the spray system 130 includes a water cup 132, which is disposed at the bottom of the inner tank. On the one hand, the water cup 132 is used to store washing water for rinsing tableware. The washing water is pumped from the water cup 132 by a water pump 133 and transported to the spray assembly 131. On the other hand, the water cup 132 is also used to collect sewage generated after washing the tableware. The sewage is collected by the water cup 132 and discharged through a drainage pipe.

[0047] Regarding the first heat exchange device 220, the first heat exchange device 220 has a first heat exchange channel 221 and a second heat exchange channel 222, wherein the refrigerant discharged from the compression device 210 can flow through the first heat exchange channel 221 to condense and release heat, and the second heat exchange channel 222 is connected to the spray system 130, and the first heat exchange channel 221 and the second heat exchange channel 222 are mutually heat exchanged; the specific shapes of the first heat exchange channel 221 and the second heat exchange channel 222 are not limited, for example, but not limited to straight tube, curved tube, spiral, etc. The first heat exchange device 220 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.

[0048] 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 221, and the second heat exchange channel 222 is formed between the inner tube and the outer shell, or the inner tube forms the second heat exchange channel 222, and the first heat exchange channel 221 is formed between the inner tube and the outer shell.

[0049] The plate heat exchanger is composed of a plurality of plates with gaps between the plates, through which a first heat exchange channel 221 and a second heat exchange channel 222 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.

[0050] 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.

[0051] 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.

[0052] Regarding the second heat exchange device 230, the second heat exchange device 230 is arranged in the heat exchange air duct 110. In this way, in the drying mode or drying stage, the air in the heat exchange air duct 110 flows through the washing chamber 120 after being heated by the second heat exchange device 230, heats and dries the dishes in the washing chamber 120, and then flows out from the exhaust port. Among them, the second heat exchange device 230 is mainly used to heat the air. The second heat exchange device 230 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 230 includes a second heat exchange element 231 and a second fan 232. The second fan 232 is used to supply air to the second heat exchange element 231. The second heat exchange element 231 is provided with a heat exchange channel for medium circulation. In this embodiment, the second heat exchange device 230 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.

[0053] Regarding the third heat exchange device 240, the third heat exchange device 240 is used to exchange heat with the air, usually to absorb heat from the air. The third heat exchange device 240 includes a heat sink, a fan, a heat pipe, etc., and cools the gas by forced convection. For example, the third heat exchange device 240 includes a third heat exchange element 241 and a third fan 242. The third fan 242 is used to supply air to the third heat exchange element 241. The third heat exchange element 241 is provided with a heat exchange channel for medium circulation.

[0054] Regarding the installation gap, the installation gap can be formed between the outer shell and the inner tank, or between the outer shell and the spray system 130, or between the outer shell, the inner tank and the spray system 130. In short, the installation gap can be formed between any necessary parts of the dishwasher 10.

[0055] In one embodiment, the first heat exchange device 220 includes a first heat exchange member, which is a flexible member and has the first heat exchange channel 221 and the second heat exchange channel 222. The dishwasher body 100 also has an installation gap, and the first heat exchange member is arranged in the installation gap. It can be understood that the first heat exchange member can be tubular or in other shapes, and only needs to be a flexible member. The first heat exchange member of the flexible member is easy to arrange in the installation gap of the dishwasher 10, that is, it is easy to arrange in the internal space of the dishwasher 10, reducing the gap between the first heat exchange member and other components of the dishwasher 10, and reducing the installation space occupied by the first heat exchange device 220, so that the internal structure of the dishwasher 10 is more compact.

[0056] In one embodiment, the spray system 130 includes a spray assembly 131 and a water cup 132, the second heat exchange channel 222 connects the water cup 132 and the spray assembly 131, so as to heat the washing water discharged from the water cup 132 to the spray assembly 131, the dishwasher body 100 includes a shell, the installation gap is formed between the shell and the water cup 132, the first heat exchange element is arranged on one side of the water cup 132; or, the first heat exchange element is wrapped around the circumference of the water cup 132.

[0057] It is understandable that the first heat exchanger is arranged on one side of the water cup 132, which can be the front side, the rear side, the left side, the right side or the bottom side, among which the side facing the user (the side where the door body is located) is the front side. Preferably, the first heat exchanger is arranged on the rear side of the water cup 132, that is, the side away from the door body. Of course, the first heat exchanger can also be wrapped around the peripheral side of the water cup 132. Such a configuration is conducive to reducing the installation space occupied by the first heat exchanger, making the internal structure of the dishwasher 10 more compact.

[0058] In one embodiment, the first heat exchange member includes an outer tube and an inner tube, the outer tube and the inner tube are flexible tubes, the inner tube forms the first heat exchange channel 221, and the second heat exchange channel 222 is formed between the outer tube and the inner tube; or, the inner tube forms the second heat exchange channel 222, and the first heat exchange channel 221 is formed between the outer tube and the inner tube. Such an arrangement facilitates the installation gap of the first heat exchange member in the dishwasher 10, so as to reduce the installation space occupied by the first heat exchange device 220, and make the internal structure of the dishwasher 10 more compact.

[0059] In one embodiment, the third heat exchange device 240 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 240, and there is no need to dispose the third heat exchange device 240 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 240 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 240, and it can be installed as needed, which improves the convenience of installing the third heat exchange device 240.

[0060] In one embodiment, the dishwasher body 100 includes a first damper (not shown), which is movably disposed at the exhaust port; the first damper is used to close the exhaust port in the washing stage and to open the exhaust port in the drying stage. 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 the dishes in the washing stage, the first damper closes the exhaust port to prevent the washing water from splashing out of the exhaust port; when the dishwasher 10 heats and dries the 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.

[0061] 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. In addition, 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.

[0062] In one embodiment, the dishwasher body 100 further includes a second damper (not shown), which is movably disposed at the air inlet; the second damper is used to close the air inlet during the washing stage and to open the air inlet during the drying stage. 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 during 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 during 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.

[0063] 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.

[0064] 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 230.

[0065] See also Figure 1 and Figure 2 In the embodiment of the present invention, the second heat exchange device 230 includes a second heat exchange element 231 and a second fan 232, wherein the second fan 232 is used to supply air to the second heat exchange element 231, and the air outlet side of the second fan 232 is connected to the washing chamber 120. It can be understood that the second heat exchange element 231 is provided with a heat exchange channel for the circulation of the refrigerant, and by providing the second fan 232, the heat exchange efficiency of the second heat exchange device 230 can be accelerated, thereby improving the drying speed of the dishes.

[0066] In one embodiment, the third heat exchange device 240 includes a third heat exchange element 241 and a third fan 242, wherein the third fan 242 is used to supply air to the third heat exchange element 241, and an air outlet is provided on the housing, and the air outlet side of the third fan 242 is connected to the air outlet. It can be understood that the third heat exchange element 241 is provided with a heat exchange channel for the circulation of refrigerant, and by providing the third fan 242, the heat exchange efficiency of the third heat exchange device 240 can be accelerated, and at the same time, the third heat exchange element 241 can be prevented from frosting during the drying stage.

[0067] In one embodiment, the third heat exchange device 240 may also be disposed outside the housing of the dishwasher 10 .

[0068] In one embodiment, the second heat exchange device 230 and the third heat exchange device 240 are disposed below the inner tank.

[0069] 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.

[0070] It is understandable that the heat pump system 200 further includes a throttling device 250. The functions of the throttling device 250 are mainly as follows:

[0071] Adjusting the refrigerant flow: The throttling device 250 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.

[0072] Reducing the difficulty of heat exchange: For example, during the heat exchange process, the throttling device 250 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.

[0073] Achieving temperature control: The throttling device 250 can also be used as an important part of temperature control. When the system requires a colder temperature, the throttling device can be used to reduce the flow of the refrigerant, thereby reducing the evaporation temperature. Conversely, when the system requires a warmer temperature, the throttling device can be used to increase the flow of the refrigerant, thereby increasing the evaporation temperature.

[0074] In one embodiment, the heat pump system 200 further includes a throttling device 250 , which is disposed in the circulating heat exchange loop and located between the second heat exchange device 230 and the third heat exchange device 240 .

[0075] It is understandable that the throttling device 250 may be an electronic expansion valve. In the washing stage, the refrigerant discharged from the compression device 210 flows along the circulating heat exchange loop, and the refrigerant sequentially flows through the first heat exchange channel 221 to condense and release heat, flows through the second heat exchange device 230, and then flows through the throttling device 250 for throttling, and then flows through the third heat exchange device 240 to evaporate and absorb heat, and then returns to the compression device 210. In this process, the compression device 210 can control the pressure and temperature of the discharged refrigerant according to actual needs, so that the refrigerant flows through the second heat exchange channel 222 to condense and release heat. That is to say, in the washing stage, the refrigerant discharged by the compression device 210 can flow through the first heat exchange channel 221 and the second heat exchange device 230 in sequence to condense and release heat, and then flow through the throttling device 250 to throttle and flow through the third heat exchange device 240 to evaporate and absorb heat, and then return to the compression device 210. In this way, during the washing stage, the heat generated by the second heat exchange device 230 can also flow into the washing chamber 120 to heat the inner wall of the chamber, the washing water and the tableware, thereby helping to improve the washing effect of the tableware. In the drying stage, the refrigerant discharged by the compression device 210 flows through the first heat exchange channel 221 and the second heat exchange device 230 in sequence to condense and release heat, and then flow through the throttling device 250 to throttle and flow through the third heat exchange device 240 to evaporate and absorb heat, and then return to the compression device 210. In this process, the second heat exchange device 230 generates heat, and the air is heated by the second heat exchange device 230 and flows into the washing chamber 120 along the heat exchange air duct 110 to heat and dry the dishes in the washing chamber 120, and then is discharged from the exhaust port. It can be seen that the throttling device 250 of this solution can throttle in multiple working stages, that is, the throttling device 250 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.

[0076] See also Figure 1 and Figure 2 In the embodiment of the present invention, the spray system 130 includes a water pump 133 and a spray assembly 131. The spray assembly 131 is disposed in the washing chamber 120 and is used to spray washing water into the washing chamber 120. The second heat exchange channel 222 is connected to the spray assembly 131 through a first pipeline 134. The water pump 133 is disposed on the first pipeline 134.

[0077] It can be understood that the water pump 133 is arranged on the first pipeline 134, and the spray system 130 also includes a water cup 132, which is arranged at the bottom of the washing chamber 120. The water cup 132, the second heat exchange channel 222, the water pump 133 and the spray assembly 131 are connected in sequence, so that the water pump 133 can transport the washing water in the water cup 132 to the spray assembly 131, and the spray assembly 131 then sprays the washing water to the washing chamber 120 to clean the tableware placed in the washing chamber 120. By providing the water pump 133, it is ensured that the spray assembly 131 can generate sufficient water pressure and flow to ensure the washing effect.

[0078] In one embodiment, the dishwasher 10 further includes an electric heating device 300, which is disposed on the first pipeline 134 and is used to heat the washing water in the first pipeline 134. It is understandable that the electric heating device 300 is an auxiliary heating device that uses electric energy as an energy source, and converts electric energy into heat energy, mainly to provide 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 134, the electric heating device 300 is used to heat the washing water in the first pipeline 134. During the washing stage, if the heat pump system 200 cannot meet the demand, the electric heating device 300 can be started.

[0079] 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.

[0080] It is understandable that the heat exchange air duct 110 and the first pipeline 134 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.

[0081] 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 includes a compression 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, and the compression device, the first heat exchange channel, the second heat exchange device and the third heat exchange device are connected in sequence to form a circulating heat exchange loop; the second heat exchange channel is connected to the spray system, and the second heat exchange channel is used for washing water to flow through so as to exchange heat with the refrigerant flowing through the first heat exchange channel; the second heat exchange device is arranged in the heat exchange air duct to provide hot air to the washing chamber during the drying stage.

2. The dishwasher according to claim 1, characterized in that The first heat exchange device includes a first heat exchange member, which is a flexible member and has the first heat exchange channel and the second heat exchange channel. The dishwasher body also has an installation gap, and the first heat exchange member is arranged in the installation gap.

3. The dishwasher according to claim 2, characterized in that The spray system includes a spray assembly and a water cup, the second heat exchange channel communicates with the water cup and the spray assembly to heat the washing water discharged from the water cup to the spray assembly, the dishwasher body includes a shell, the installation gap is formed between the shell and the water cup, and the first heat exchange member is arranged on one side of the water cup; Alternatively, the first heat exchange element is wound around the circumference of the water cup.

4. The dishwasher according to claim 2, characterized in that The first heat exchange member comprises an outer tube and an inner tube, the outer tube and the inner tube are flexible tubes, the inner tube forms the first heat exchange channel, and the second heat exchange channel is formed between the outer tube and the inner tube; Alternatively, the inner tube forms the second heat exchange channel, and the first heat exchange channel is formed between the outer tube and the inner tube.

5. 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.

6. The dishwasher according to claim 1, characterized in that The dishwasher body comprises a first damper, which is movably arranged at the exhaust port; the first damper is used to close the exhaust port in the washing stage and to open the exhaust port in the drying stage.

7. 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.

8. The dishwasher according to claim 7, characterized in that The dishwasher body further comprises a second air door, which is movably arranged at the air inlet; the second air door is used to close the air inlet during the washing stage and to open the air inlet during the drying stage.

9. 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.

10. The dishwasher according to claim 9, 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.

11. The dishwasher according to claim 1, characterized in that The heat pump system further comprises a throttling device, which is arranged in the circulating heat exchange loop and located between the second heat exchange device and the third heat exchange device.

12. The dishwasher according to any one of claims 1 to 11, 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.

13. The dishwasher according to claim 12, 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.

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