Dishwasher

Abstract

The utility model discloses a dish-washing machine which comprises a dish-washing machine body and a heat pump system, the dish-washing machine body is provided with a washing cavity and a spraying system, and the spraying system is used for spraying washing water to the washing cavity; the heat pump system comprises a compression device, a first heat exchange device and a second 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 and the second heat exchange device are sequentially communicated to form a circulation heat exchange loop. The first heat exchange device comprises an outer pipe and an inner pipe, the inner pipe forms a first heat exchange channel, and a second heat exchange channel is formed between the outer pipe and the inner pipe; or, the inner pipe forms a second heat exchange channel, and a first heat exchange channel is formed between the outer pipe and the inner pipe. The energy consumption of the existing dish washing machine can be reduced.

Description

Technical Field

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

[0002] A dishwasher generally has a washing function. To facilitate washing of items during washing, the dishwasher needs to heat the washing water. However, the current dishwasher has a low heat exchange efficiency when heating the washing water, which results in more energy consumption when heating the washing water to a preset temperature.

[0003] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Utility Model Content

[0004] The main purpose of the utility model is to provide a dishwasher, aiming to reduce the energy consumption of the existing dishwasher.

[0005] To achieve the above-mentioned purpose, the dishwasher proposed by the utility model comprises:

[0006] A dishwasher body having a washing chamber and a spray system, wherein the spray system is used to spray washing water into the washing chamber;

[0007] A heat pump system, comprising a compression device, a first heat exchange device and a second heat exchange device, wherein the first heat exchange device has a first heat exchange channel and a second heat exchange channel arranged for heat exchange with each other, and the compression device, the first heat exchange channel and the second heat exchange device are connected in sequence to form a circulating heat exchange loop; the first heat exchange device comprises an outer tube and an inner tube, the inner tube forms a first heat exchange channel, and a second heat exchange channel is formed between the outer tube and the inner tube; or, the inner tube forms a second heat exchange channel, and the first heat exchange channel is formed between the outer tube and the inner tube; a water inlet and a water outlet connected to the second heat exchange channel are provided on the outer tube, one of the water inlet and the water outlet is provided on the outer peripheral wall of the outer tube, and the other is provided at the end of the outer tube, the water inlet is used to be connected to a water source, and the water outlet is connected to a spray system; 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.

[0008] In one embodiment, the water inlet is arranged on the outer peripheral wall of the outer tube, the water outlet is arranged at the end of the outer tube, and the water inlet is arranged close to the water outlet.

[0009] In one embodiment, the first heat exchange device further includes a water inlet pipe and a water outlet pipe, the water inlet pipe is arranged at the water inlet, and the water outlet pipe is arranged at the water outlet.

[0010] In one embodiment, the water outlet pipe is inserted into the outer pipe and extends toward an end away from the water outlet.

[0011] In one embodiment, the first heat exchange passage comprises a double helical tube, and the double helical tube comprises a first communication port for communicating with the compression device and a second communication port for communicating with the second heat exchange device.

[0012] In one embodiment, the second heat exchange device is disposed outside the washing chamber.

[0013] In one embodiment, the dishwasher further comprises a housing;

[0014] The second heat exchange device comprises a heat exchange element and a fan, wherein the fan is used to supply air to the heat exchange element;

[0015] The shell is provided with an air outlet, and the air outlet side of the fan is communicated with the air outlet.

[0016] In one embodiment, the heat pump system further includes a throttling device, which is disposed in the circulating heat exchange loop and located between the second heat exchange channel and the second heat exchange device.

[0017] In one embodiment, the spray system includes a spray assembly, a water cup and a water pump. The spray assembly is arranged in the washing chamber and is used to spray washing water into the washing chamber. The water cup is connected to the second heat exchange channel. The second heat exchange channel is connected to the spray assembly through a first pipeline. The water pump is arranged on the first pipeline.

[0018] In one embodiment, the dishwasher further includes an electric heating device, which is disposed on the first pipeline and is used to heat the washing water in the first pipeline.

[0019] The dishwasher of the present application includes a dishwasher body and a heat pump system, the dishwasher body has a washing chamber and a spray system; the heat pump system includes a compression device, a first heat exchange device and a second heat exchange device, the first heat exchange device includes a first heat exchange member, the first heat exchange member 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 and the second heat exchange device are connected in sequence to form a circulating heat exchange loop, and the second heat exchange channel is connected to the spray system. In this way, when the dishwasher is in the washing stage, the refrigerant discharged by the compression device passes through the circulating heat exchange loop, and the refrigerant flows through the first heat exchange channel to condense and release heat. At this time, the first heat exchange member 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 make hot water, and the obtained washing hot water is sprayed into the washing chamber to clean the tableware placed in the washing chamber. It can be seen that the heat generated by the first heat exchange device in the dishwasher of the present application is used for the washing stage, and the utilization rate of the heat generated by the first heat exchange device is high, which reduces energy waste and is conducive to reducing the energy consumption of the dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 A structural schematic diagram of an embodiment of a dishwasher provided by the utility model;

[0022] Figure 2 This is a schematic cross-sectional structure diagram of the first heat exchange device of the dishwasher of the present application.

[0023] Description of Figure Numbers:

[0024] 10. Dishwasher;

[0025] 100, dishwasher body; 120, washing chamber; 140, spray system; 141, spray assembly; 142, water cup; 143, water pump; 144, first pipeline;

[0026] 200, heat pump system; 210, compression device; 220, first heat exchange device; 221, outer tube; 2211, water inlet pipe; 2212, water outlet pipe; 222, inner tube; 2221, first connecting port; 2222, double helix tube; 2223, second connecting port; 230, second heat exchange device; 231, heat exchange element; 232, fan; 240, throttling device;

[0027] 300. Electric heating device.

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The utility model provides a dishwasher, which aims to reduce the energy consumption of existing dishwashers. The dishwasher can be used for home use or commercial use. For ease of understanding and description, in the drawings of the specification of this application, the solid arrows indicate spaces, slots or holes.

[0033] See also Figure 1 In an embodiment of the present application, a dishwasher 10 includes a dishwasher 10 body and a heat pump system 200. The dishwasher 10 body has a washing chamber 120 and a spray system 140. The spray system 140 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 and a second heat exchange device 230. The first heat exchange device 220 has a first heat exchange channel and a second heat exchange channel arranged for heat exchange with each other. The compression device 210, the first heat exchange channel and the second heat exchange device 230 are connected in sequence to form a circulating heat exchange loop. The first heat exchange device 220 includes an outer tube 221 and an inner tube 222. The inner tube 222 forms a first heat exchange channel, and a second heat exchange channel is formed between the outer tube 221 and the inner tube 222; or, the inner tube 222 forms a second heat exchange channel, and a first heat exchange channel is formed between the outer tube 221 and the inner tube 222; the outer tube 221 is provided with a water inlet and a water outlet connected to the second heat exchange channel, one of the water inlet and the water outlet is provided on the outer peripheral wall of the outer tube 221, and the other is provided at the end of the outer tube 221, the water inlet is used to be connected to a water source, and the water outlet is connected to the spray system 140; 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.

[0034] 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 and the second heat exchange channel exchange heat with each other to produce hot water for the spray system 140. The compression device 210 is not limited to being a compressor, and the refrigerant discharged from the compression device 210, for example, is a chlorofluorocarbon, a hydrochlorofluorocarbon, a hydrofluorocarbon or other Freon, or a hydrofluorocarbon.

[0035] Further, the dishwasher 10 includes a dishwasher 10 body and a heat pump system 200, and the heat pump system 200 is used to heat the washing water in the spray system 140. The dishwasher 10 body generally includes a shell and a spray system 140, and the shell constructs a washing chamber 120. The shell generally includes an outer shell, an inner tank and a door body, and the outer shell is provided with a first opening, and the inner tank is provided in the outer shell. 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. In some embodiments, the dishwasher 10 can be a structure in which the door body and the inner tank are integrated into one body.

[0036] Regarding the spray system 140, the spray system 140 is used to spray washing water into the washing chamber 120 to clean the tableware placed in the washing chamber 120. The spray system 140 generally includes but is not limited to a water pump 143, a spray assembly 141, a water cup 142, a pipeline assembly, a controller, a filter, a water level sensor, and a drainage device. Among them, the water pump 143 is one of the key components of the spray system 140 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 143 is usually driven by an electric motor to generate sufficient water pressure and flow to ensure the washing effect. The spray assembly 141 generally includes a spray arm and / or a nozzle. The spray assembly 141 is the outlet for the spray of the cleaning liquid in the spray system 140 of the dishwasher 10. The spray assembly 141 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 141 is used to control the start and stop, spray time, spray mode and other parameters of the spray assembly 141. The controller of the spray assembly 141 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 140 from being blocked, which is conducive to maintaining the normal operation and cleaning effect of the spray system 140. The water level sensor is used to monitor the internal water level of the water cup 142 of the dishwasher 10 to ensure the stable operation of the water pump 143 to prevent the water level from being too high during the drying stage and drying. 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 143 and a drainage filter.

[0037] In one embodiment, the spray system 140 includes a water cup 142, which is disposed at the bottom of the inner tank. On the one hand, the water cup 142 is used to store washing water for rinsing dishes. The washing water is pumped from the water cup 142 by a water pump 143 and transported to the spray assembly 141. On the other hand, the water cup 142 is also used to collect sewage generated after washing the dishes. The sewage is collected by the water cup 142 and discharged through a drainage pipe.

[0038] Regarding the first heat exchange device 220, the first heat exchange device 220 has a first heat exchange channel and a second heat exchange channel, wherein the refrigerant discharged from the compression device 210 can flow through the first heat exchange channel to condense and release heat, the second heat exchange channel is connected to the spray system 140, and the first heat exchange channel and the second heat exchange channel are mutually heat exchanged; the specific shapes of the first heat exchange channel and the second heat exchange channel 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 using a shell and tube heat exchanger, a plate heat exchanger, a spiral heat exchanger, a shell and tube heat exchanger, etc.

[0039] The shell and tube heat exchanger includes an outer tube 221 and an inner tube 222. The heat transfer medium (generally liquid or steam) passes through the inner tube 222 to transfer heat to another medium (which can be liquid, gas or steam, and liquid in this embodiment), and the outer tube 221 is sleeved outside the inner tube 222. The inner tube 222 forms the first heat exchange channel, and the outer tube 221 has a second heat exchange channel formed therein. The shell and tube heat exchanger also includes an inlet pipe 2211 and an outlet pipe 2212, wherein the inlet pipe 2211 and the outlet pipe 2212 are both connected to the second heat exchange channel, and the inlet pipe 2211, the second heat exchange channel and the outlet pipe 2212 are connected in sequence to form the second heat exchange channel.

[0040] In one embodiment, if Figure 2 As shown, the inner tube 222 can be a double helix tube 2222, which includes a first connecting port 2221 connected to the compression device 210 and a second connecting port 2223 for connecting to the second heat exchange device 230, wherein the double helix tube 2222 is arranged in the second heat exchange channel, and the first connecting port 2221 and the second connecting port 2223 extend out of the second heat exchange channel and are arranged on the same side of the outer tube 221. The double helix tube 2222 is used as the first heat exchange channel to effectively increase the heat exchange area in the second heat exchange channel, thereby achieving a better heat exchange effect.

[0041] In one embodiment, the first heat exchange device 220 includes an outer tube 221 and an inner tube 222, wherein the water inlet pipe 2211 is arranged at a water inlet on the outer peripheral side of the outer tube 221, and the water outlet pipe 2212 is arranged at a water outlet at one end of the outer tube 221 away from the water inlet pipe 2211. Such an arrangement allows the washing water to turn over several times along the inner peripheral wall of the outer tube 221 under the pressure of the subsequently entering washing water when entering the second heat exchange channel for heat exchange and then flow smoothly. After turning over several times, the washing water can effectively extend the path length of the washing water discharged through the second heat exchange channel, so that the washing water can more efficiently exchange heat with the heat exchange medium flowing in the first heat exchange channel.

[0042] In another embodiment, the difference from the above embodiment is that the water inlet pipe 2211 and the water outlet pipe 2212 are located on the same side of the outer tube 221, that is, the water inlet and the water outlet are close to each other on the outer tube 221, wherein the water outlet pipe 2212 is inserted into the second heat exchange channel, and the water outlet pipe 2212 extends toward the end away from the water outlet, close to the bottom of the cavity of the outer tube 221, such as Figure 2 As shown, such an arrangement can further increase the path length of the washing water flowing through the second heat exchange channel. After the washing water enters the second heat exchange channel through the water inlet pipe 2211, it first turns over through the inner wall of the outer tube 221, and then flows toward the bottom of the cavity of the outer tube 221 away from the water outlet, and finally is discharged through the water outlet pipe 2212. Because a large part of the water outlet pipe 2212 is arranged in the second heat exchange channel, the washing water discharged through the water outlet pipe 2212 can also realize heat exchange with the heat exchange medium in the first heat exchange channel again, thereby making the heat exchange effect better.

[0043] Regarding the second heat exchange device 230, the second heat exchange device 230 is used to exchange heat with the air, usually absorbing heat from the air. The second heat exchange device 230 includes a heat sink, a fan 232, a heat pipe, etc., and cools the gas by forced convection. For example, the second heat exchange device 230 includes a heat exchange element 231 and a fan 232. The fan 232 is used to supply air to the heat exchange element 231. The 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 a spiral heat exchanger and the function of an air heat exchanger, and exchanges heat with the air through a spiral pipe structure.

[0044] The dishwasher 10 of the present application includes a dishwasher 10 body and a heat pump system 200. The dishwasher 10 body has a washing chamber 120 and a spray system 140. The heat pump system 200 includes a compression device 210, a first heat exchange device 220 and a second heat exchange device 230. The first heat exchange device 220 includes a first heat exchange element 231. The first heat exchange element 231 has a first heat exchange channel and a second heat exchange channel that are arranged for heat exchange with each other. The compression device 210, the first heat exchange channel and the second heat exchange device 230 are connected in sequence to form a circulating heat exchange loop. The second heat exchange channel is connected to the spray system 140. With such a configuration, when the dishwasher 10 is in the washing stage, the refrigerant discharged by the compression device 210 passes through the circulating heat exchange loop, and the refrigerant flows through the first heat exchange channel to condense and release heat. At this time, the first heat exchange element 231 generates heat, and the washing water in the spray system 140 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 120 to clean the tableware placed in the washing chamber 120. It can be seen that the heat generated by the first heat exchange device 220 in the dishwasher 10 of the present application is used for the washing stage. The heat generated by the first heat exchange device 220 has a high utilization rate, which reduces energy waste and is beneficial to reducing the energy consumption of the dishwasher 10.

[0045] In one embodiment, the second heat exchange device 230 is disposed outside the washing chamber 120. In this way, the second heat exchange device 230 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 second heat exchange device 230, and it can be installed as needed, which improves the convenience of installation of the second heat exchange device 230.

[0046] In one embodiment, the main body of the dishwasher 10 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.

[0047] In one embodiment, the second heat exchange device 230 includes a heat exchange element 231 and a fan 232, wherein the fan 232 is used to supply air to the heat exchange element 231, an air outlet is provided on the housing, and an air outlet side of the fan 232 is connected to the air outlet.

[0048] It is understandable that the heat exchange element 231 is provided with a heat exchange channel for the circulation of refrigerant, and by providing a fan 232, the heat exchange efficiency of the heat exchange element 231 can be accelerated.

[0049] In one embodiment, the second heat exchange device 230 may also be disposed outside the housing of the dishwasher 10 .

[0050] In one embodiment, the first heat exchange device 220 and the second heat exchange device 230 are disposed below the inner tank.

[0051] In one embodiment, the spray system 140 includes a spray assembly 141 and a water cup 142 , and the second heat exchange channel connects the water cup 142 and the spray assembly 141 to heat the washing water discharged from the water cup 142 to the spray assembly 141 .

[0052] It is understandable that the heat pump system 200 further includes a throttling device 240. The functions of the throttling device 240 are mainly as follows:

[0053] Adjusting the refrigerant flow: The throttling device 240 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.

[0054] Reduce the difficulty of heat exchange: For example, during the heat exchange process, the throttling device 240 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, reduce the difficulty of heat exchange, and improve the heat exchange efficiency.

[0055] Achieving temperature control: The throttling device 240 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.

[0056] Please refer to the figure. In one embodiment, the heat pump system 200 further includes a throttling device 240 . The throttling device 240 is disposed in the circulating heat exchange loop and is located between the first heat exchange element 231 and the second heat exchange device 230 .

[0057] It is understandable that the throttling device 240 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, flows through the first heat exchange channel to condense and release heat, then flows through the throttling device 240 for throttling, then flows through the second heat exchange device 230 to evaporate and absorb heat, and then returns to the compression device 210. In this process, the heat generated by the first heat exchange device 220 can heat the washing water, which is beneficial to improve the washing effect of the dishes.

[0058] Please refer to the figure. In one embodiment, the spray system 140 includes a spray component 141, a water cup 142 and a water pump 143. The spray component 141 is arranged in the washing chamber 120, and is used to spray washing water into the washing chamber 120. The water cup 142 is connected to the second heat exchange channel, and the second heat exchange channel is connected to the spray component 141 through a first pipeline 144. The water pump 143 is arranged on the first pipeline 144.

[0059] It can be understood that the water pump 143 is arranged on the first pipeline 144, the water cup 142 is arranged at the bottom of the washing chamber 120, the water cup 142, the second heat exchange channel, the water pump 143 and the spray assembly 141 are connected in sequence, so that the water pump 143 can transport the washing water in the water cup 142 to the spray assembly 141, and the spray assembly 141 sprays the washing water to the washing chamber 120 to clean the dishes placed in the washing chamber 120. By providing the water pump 143, it is ensured that the spray assembly 141 can generate sufficient water pressure and flow to ensure the washing effect.

[0060] In one embodiment, the dishwasher 10 further includes an electric heating device

[0061] 300, the electric heating device

[0062] 300 is provided on the first pipe 144 and is used to heat the washing water in the first pipe 144. It can be understood that the electric heating device

[0063] 300 is an auxiliary heating device that uses electric energy as energy. 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.

[0064] When 300 is arranged on the first pipeline 144, the electric heating device

[0065] 300 is used to heat the washing water in the first pipeline 144. During the washing stage, if the heat pump system 200 cannot meet the demand, the electric heating device 300 can be started.

[0066] It is understandable that the electric heating device

[0067] 300 usually includes an electric heating element, a control element and a protection element. The electric heating element is usually an electric heating wire, an electric heating tube or an electric heating plate. 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 usually includes a temperature sensor and a temperature controller. The temperature controller is usually integrated with other control elements into a control device. The protection element is used to ensure that the electric heating device

[0068] 300 for safe operation, preventing overheating or circuit failure, usually including an overheat 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 when the electric current acts on it, 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 based on the feedback information from the temperature sensor to keep the fluid temperature within the set range. If the temperature is too high or a failure occurs, the protection element will automatically disconnect the power supply to ensure safe operation.

[0069] 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: A dishwasher body having a washing chamber and a spray system, wherein the spray system is used to spray washing water into the washing chamber; A heat pump system, comprising a compression device, a first heat exchange device and a second heat exchange device, wherein the first heat exchange device has a first heat exchange channel and a second heat exchange channel arranged for heat exchange with each other, and the compression device, the first heat exchange channel and the second heat exchange device are connected in sequence to form a circulating heat exchange loop; the first heat exchange device comprises an outer tube and an inner tube, the inner tube forms a first heat exchange channel, and a second heat exchange channel is formed between the outer tube and the inner tube; or, the inner tube forms a second heat exchange channel, and the first heat exchange channel is formed between the outer tube and the inner tube; a water inlet and a water outlet connected to the second heat exchange channel are provided on the outer tube, one of the water inlet and the water outlet is provided on the outer peripheral wall of the outer tube, and the other is provided at the end of the outer tube, the water inlet is used to be connected to a water source, and the water outlet is connected to a spray system; 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.

2. The dishwasher according to claim 1, characterized in that The water inlet is arranged on the outer peripheral wall of the outer tube, the water outlet is arranged at the end of the outer tube, and the water inlet is arranged close to the water outlet.

3. The dishwasher according to claim 2, characterized in that The first heat exchange device further includes a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is arranged at the water inlet, and the water outlet pipe is arranged at the water outlet.

4. The dishwasher according to claim 3, characterized in that The water outlet pipe is inserted into the outer pipe and extends toward an end away from the water outlet.

5. The dishwasher according to claim 4, characterized in that The first heat exchange passage includes a double helical tube, and the double helical tube includes a first communication port for communicating with the compression device and a second communication port for communicating with the second heat exchange device.

6. The dishwasher according to claim 1, characterized in that The second heat exchange device is arranged outside the washing chamber.

7. The dishwasher according to claim 1, characterized in that The dishwasher also includes a housing; The second heat exchange device comprises a heat exchange element and a fan, wherein the fan is used to supply air to the heat exchange element; The shell is provided with an air outlet, and the air outlet side of the fan is communicated with the air outlet.

8. 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 channel and the second heat exchange device.

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

10. The dishwasher according to claim 9, characterized in that The dishwasher further comprises an electric heating device, which is arranged on the first pipeline and is used for heating the washing water in the first pipeline.

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