Heat exchanger and dishwasher

Abstract

The application discloses a heat exchange device and a dish washing machine. The heat exchange device comprises an evaporator, a first liquid storage tank, a second liquid storage tank and a power element. The evaporator is provided with a medium inlet and a medium outlet. The first liquid storage tank is communicated with the medium inlet. The second liquid storage tank is communicated with the medium outlet and the first liquid storage tank. The second liquid storage tank is provided with a liquid inlet and an exhaust port. The power element is arranged between the evaporator and the first liquid storage tank or between the evaporator and the second liquid storage tank to drive the liquid medium to circulate and flow among the first liquid storage tank, the evaporator and the second liquid storage tank. The above scheme can greatly reduce the noise generated by heating the refrigerant.

Description

Technical Field

[0001] This application relates to the field of dishwasher technology, and in particular to a heat exchange device and a dishwasher. Background Technology

[0002] Most dishwashers currently use spray arms to wash dishes placed in the dish rack. Since the water needs to be heated to a certain temperature during the washing process, the common method is to use electric heating. An electric heater and water pump are located at the bottom, and the heated water is pumped into the spray arms to wash the dishes. After washing, the water flows back to the water cup, is filtered, and reheated, thus circulating for further washing. For energy conservation, some patented technologies use heat pump devices for heating. However, currently, heat pump devices are generally heated using air cooling, which results in noticeable noise. Summary of the Invention

[0003] This application provides at least one heat exchange device and a dishwasher that greatly reduce the noise generated by heating refrigerant.

[0004] The first aspect of this application provides a heat exchange device, which includes an evaporator, a first liquid storage tank, a second liquid storage tank, and a power component;

[0005] An evaporator, which has a medium inlet and a medium outlet;

[0006] The first liquid storage tank is connected to the medium inlet;

[0007] The second liquid storage tank is connected to the medium outlet and the first liquid storage tank. The second liquid storage tank has an inlet and an outlet.

[0008] A power unit is located between the evaporator and the first liquid storage tank, or between the evaporator and the second liquid storage tank, to drive the liquid medium to circulate between the first liquid storage tank, the evaporator and the second liquid storage tank.

[0009] The second liquid storage tank and the evaporator are mounted on the mounting surface of the first liquid storage tank, and the distance from the highest point of the second liquid storage tank to the mounting surface is greater than the distance from the highest point of the evaporator to the mounting surface.

[0010] The mounting surface has a mounting groove, and the evaporator is embedded in the mounting groove.

[0011] The installation groove has an outlet, which is connected to the medium inlet.

[0012] The first liquid storage tank has an inlet, and the second liquid storage tank is connected to the inlet;

[0013] The outlet and inlet are located at opposite corners of the first liquid storage tank.

[0014] The medium inlet is located on the side wall of the evaporator, and the medium outlet is located at the top of the evaporator.

[0015] The power unit's input end is connected to the evaporator's medium outlet, and its output end is connected to the second liquid storage tank.

[0016] The second liquid storage tank has an inlet and an outlet. The outlet of the second liquid storage tank is connected to the first liquid storage tank, and the inlet of the second liquid storage tank is connected to the medium outlet of the evaporator.

[0017] The inlet is located on the side of the outlet of the second liquid storage tank that is far from the inlet of the second liquid storage tank, and the outlet is located on the side of the inlet of the second liquid storage tank that is far from the outlet of the second liquid storage tank.

[0018] The heat exchange device includes a heater disposed in at least one of the first liquid storage tank and the second liquid storage tank.

[0019] A second aspect of this application provides a dishwasher that includes the heat exchange device described above.

[0020] The dishwasher includes a heat pump unit and a water cup. The heat pump unit includes a condenser. The outlet of the water cup is connected to the inlet of the condenser, and the drain outlet of the water cup is used to discharge wastewater.

[0021] The condenser's inlet is higher than the dishwasher's cup outlet, and the cup outlet is higher than the cup's drain outlet.

[0022] The refrigerant outlet, refrigerant inlet, and water outlet of the condenser, as well as the medium outlet, refrigerant outlet, and refrigerant inlet of the evaporator, are all set in the same direction.

[0023] The beneficial effects of this application are as follows: The dishwasher proposed in this application uses a liquid medium to heat the refrigerant of the heat pump device, that is, it uses a liquid cooling circulation method to absorb the cold energy of the refrigerant in the heat pump device, which greatly reduces the noise generated by heating the refrigerant and can reduce energy consumption compared with pure electric heating; and the liquid storage tank of the heat exchange device can be divided into two parts: a first liquid storage tank and a second liquid storage tank. In addition, a power component provides power for the liquid medium to circulate between the first liquid storage tank, the evaporator and the second liquid storage tank, so that the liquid medium can be fully circulated through the two liquid storage tanks and the power component, thereby improving the heat exchange efficiency of the heat exchange device.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the technical solutions of this application.

[0026] Figure 1 This is a schematic diagram of the structure of a dishwasher according to one embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the specific structure of the dishwasher in another embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the heat exchange device in one embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the heat exchange device in another embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the evaporator structure in one embodiment of this application;

[0031] Figure 6 This is a cross-sectional schematic diagram of an evaporator in one embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the connection method between the heat exchange device and the heat pump device in one embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] To address the issue of significant noise in existing air-cooled heat pump devices, the dishwasher 100 proposed in this application utilizes a liquid medium to heat the refrigerant in the heat pump device. This means that the cold energy of the refrigerant in the heat pump device is absorbed through a liquid cooling circulation method, which greatly reduces the noise generated by heating the refrigerant and reduces energy consumption compared to pure electric heating.

[0036] like Figure 1 As shown, Figure 1 This is a schematic diagram of one embodiment of the dishwasher 100 of this application. The dishwasher 100 of this embodiment includes a washing water spray device, a heat pump device, and a heat exchange device.

[0037] The heat pump device heats the washing water using refrigerant; the washing water spraying device sprays the heated washing water from the heat pump device into the cleaning chamber of the dishwasher 100 through the spray arm 9 to clean the dishes and other items in the cleaning chamber; in addition, the heat exchange device heats the refrigerant to ensure the heating efficiency of the refrigerant on the washing water.

[0038] The heat exchange device may include an evaporator 4, a liquid storage tank 6, and a power unit 5. The evaporator 4 may include a liquid medium channel and a refrigerant channel that are not interconnected, but are heat-transferringly connected. This allows the refrigerant in the refrigerant channel to absorb heat from the liquid medium in the liquid medium channel, thus heating the refrigerant through the liquid medium. The power unit 5 is located between the evaporator 4 and the liquid storage tank 6 to drive the liquid medium to circulate between the liquid storage tank 6 and the liquid medium channel of the evaporator 4. This allows the circulating liquid medium to heat the refrigerant in the refrigerant channel of the evaporator 4, thereby improving the heat exchange capacity of the heat pump device. The circulating liquid medium in the heat exchange device may be water, brine, or an ethylene glycol solution (e.g., a mixture of ethylene glycol and water).

[0039] The heat pump device may include a compressor 1 and a condenser 2. The evaporator 2 may include separate washing water channels and refrigerant channels, but these channels are heat-transfer connected. This allows the washing water in the washing water channels to absorb heat from the refrigerant in the refrigerant channels, thus heating the washing water using the refrigerant. The compressor 1 is connected to the refrigerant outlet 44 of the evaporator 4 in the heat exchange device. The compressor 1 is also connected to the refrigerant inlet 23 of the condenser 2. The refrigerant outlet 24 of the condenser 2 is connected to the refrigerant inlet 43 of the evaporator 4. Thus, the refrigerant channels in the compressor 1 and evaporator 4, the refrigerant channels in the condenser 2, and the connecting pipes between the compressor 1, evaporator 4, and condenser 2 together constitute the refrigerant circulation channel. In this way, the heated liquid refrigerant in the evaporator 4 flows to the compressor 1. The compressor 1 heats and pressurizes the liquid refrigerant to turn it into a high-temperature gaseous refrigerant. The high-temperature gaseous refrigerant enters the refrigerant channel of the condenser 2 through the refrigerant inlet 23 and exchanges heat with the washing water in the washing water channel of the condenser 2 to heat the washing water. After the heat of the high-temperature gaseous refrigerant is absorbed by the washing water, it becomes a low-temperature liquid refrigerant and flows out of the condenser 2 through the refrigerant outlet 24. Then it enters the evaporator 4 through the refrigerant inlet 43 to continue to allow the liquid medium in the evaporator 4 to heat the refrigerant flowing into the evaporator 4. This cycle is repeated to continuously heat the washing water flowing through the condenser 2.

[0040] Optionally, the heat pump unit may also include a throttling device 3. The refrigerant outlet 24 of the condenser 2 is connected to the refrigerant inlet 43 of the evaporator 4 through the throttling device 3, so as to reduce the pressure of the refrigerant through the throttling device 3. The throttling device 3 may be a throttling valve.

[0041] The washing water spraying device includes a circulating water pump 8, a spray arm 9, and a water cup 12. The circulating water pump 8 is located between the condenser 2 of the heat pump unit and the spray arm 9, and the spray arm 9 is connected to at least one nozzle (e.g., an upper nozzle 10 and a lower nozzle 11) to pump the washing water in the condenser 2 through the spray arm 9 to at least one nozzle. The outlet of the water cup 12 is connected to the inlet of the condenser 2, so that when the at least one nozzle sprays washing water into the cleaning chamber and it flows to the bottom of the cleaning chamber, the washing water can enter the condenser 2 through the outlet 121 of the water cup 12 located at the bottom of the cleaning chamber to continue heating and circulating.

[0042] Additionally, the dishwasher 100 may include a drainage system for draining wastewater from the cleaning chamber after the cleaning stage is completed. The drainage system may include a pump, with its inlet connected to the drain outlet 122 of the water cup 12 and its outlet connected to the wastewater outlet 17 of the dishwasher 100, so that the wastewater in the water cup 12 can be discharged from the dishwasher 100 by the pump.

[0043] In this embodiment, the power component 5 in the heat exchanger can be used as a pump for the drainage system, so that a single pump can perform both drainage and liquid medium circulation functions. Figure 2 As shown, when the heat pump unit is running, the liquid medium circulation also runs simultaneously. At this time, the liquid valves (15, 16) are open, and the drain valves (13, 14) are closed. The liquid medium circulation starts from the medium outlet 42 of the evaporator 4, enters the pump input end through the liquid valves (15, 16), flows out from the pump output end under the pump's drive, and enters the liquid storage tank 6. After continuing to flow in the liquid storage tank 6, it enters the medium inlet 41 of the evaporator 4, completing the liquid medium circulation. When the washing cycle is completed, the drainage process begins. At this time, the liquid valves (15, 16) are closed, and the drain valves (13, 14) are opened. Wastewater flows out from the drain port 122 of the water cup 12 through the pump and out from the drain port 17. In other embodiments, the pump of the drainage system and the power component 5 of the heat exchange device are not the same device.

[0044] In addition, such as Figure 2 As shown, the dishwasher 100 may also include a water softener 18 to soften the washing water and deliver the softened washing water to the water cup 12 through a pipe. Specifically, the water softener 18 may be connected to the return water inlet 123 of the water cup 12 so that the softened washing water can be delivered to the water cup 12 through the return water inlet 123.

[0045] The dishwasher 100 may also include a controller 19, which controls devices such as heat exchangers, heat pumps, and drainage systems.

[0046] This application further improves the heat exchange device based on the overall structure of the dishwasher 100 described above in the following ways.

[0047] In this embodiment, as Figure 3 and Figure 4 As shown, the liquid storage tank 6 of the heat exchange device can be divided into two parts: a first liquid storage tank 61 and a second liquid storage tank 62. The two liquid storage tanks 6 allow for sufficient flow of the liquid medium, improving the heat exchange efficiency of the heat exchange device. Specifically, the first liquid storage tank 61 is connected to the medium inlet 41 of the evaporator 4, and the second liquid storage tank 62 is connected to the medium outlet 42 of the evaporator 4. The second liquid storage tank 62 is also connected to the first liquid storage tank 61. Thus, the liquid medium in the heat exchange device first flows from the first liquid storage tank 61 to the evaporator 4, then from the evaporator 4 to the second liquid storage tank 62, and then from the second liquid storage tank 62 back to the first liquid storage tank 61, allowing for cyclical flow of the liquid medium within the heat exchange device. The power unit 5 can be located between the evaporator 4 and the second liquid storage tank 62. The input end of the power unit 5 is connected to the medium outlet 42 of the evaporator 4, and the output end of the power unit 5 is connected to the second liquid storage tank 62, providing power for the cyclical flow of the liquid medium between the first liquid storage tank 61, the evaporator 4, and the second liquid storage tank 62. In other embodiments, the power unit 5 may be disposed between the first liquid storage tank 61 and the evaporator 4 to provide power for the circulation of the liquid medium between the first liquid storage tank 61, the evaporator 4 and the second liquid storage tank 62.

[0048] The first liquid storage tank 61 may have an outlet 612 and an inlet 611, so that the first liquid storage tank 61 is connected to the medium inlet 41 of the evaporator 4 through its outlet 612, and is connected to the second liquid storage tank 62 through its inlet 611. Optionally, the outlet 612 and the inlet 611 of the first liquid storage tank 61 may be located at opposite corners of the first liquid storage tank 61, so that the liquid medium can form sufficient flow in the first liquid storage tank 61, which can make the temperature of the liquid medium in the first liquid storage tank 61 relatively uniform, thereby improving the heating efficiency of the heat exchange device.

[0049] Alternatively, an outlet 622 and an inlet 621 can be formed on the second liquid storage tank 62. The second liquid storage tank 62 can be connected to the inlet 611 of the first liquid storage tank 61 through its outlet 622, and to the medium outlet 42 of the evaporator 4 through its inlet 621. Optionally, the outlet 622 and inlet 621 of the second liquid storage tank 62 are located at opposite ends of the second liquid storage tank 62, allowing sufficient flow of the liquid medium within the second liquid storage tank 62 and ensuring a relatively uniform temperature of the liquid medium, thereby improving the heating efficiency of the heat exchange device.

[0050] The first liquid storage tank 61 and the second liquid storage tank 62 can be arranged vertically, that is, one of the first liquid storage tank 61 and the second liquid storage tank 62 is located above the other of the first liquid storage tank 61 and the second liquid storage tank 62. Alternatively, the other of the first liquid storage tank 61 and the second liquid storage tank 62 can be understood as being located on the side of the first liquid storage tank 61 and the second liquid storage tank 62 away from the cleaning chamber. This utilizes the downward flow property of the liquid medium to accelerate the flow efficiency of the liquid medium in the heat exchange device. In this embodiment, the second liquid storage tank 62 is located above the first liquid storage tank 61, that is, in the dishwasher 100, the first liquid storage tank 61 is located on the side of the second liquid storage tank 62 away from the cleaning chamber. In other embodiments, the first liquid storage tank 61 can be located above the second liquid storage tank 62, that is, in the dishwasher 100, the second liquid storage tank 62 is located on the side of the first liquid storage tank 61 away from the cleaning chamber.

[0051] An inlet 623 can be formed on the upper liquid storage tank 62. Since the first liquid storage tank 61 and the second liquid storage tank 62 are connected, liquid medium can be added to the lower liquid storage tank 61 through the inlet 623 on the upper liquid storage tank 62. When the liquid medium in the upper liquid storage tank 62 is filled to the maximum water level through the inlet 623, the lower liquid storage tank 61 will also be filled with liquid medium. Furthermore, the inlet 623 can be formed at the highest point of the upper liquid storage tank 62, so that both liquid storage tanks 6 can be filled with liquid medium through the inlet 623. In addition, the inlet 623 can be set on the side of the upper liquid storage tank 62 away from the outlet 622 of the upper liquid storage tank 62, or the inlet 623 can also be set on the side of the upper liquid storage tank 62 away from the outlet 622 of the upper liquid storage tank 62.

[0052] Additionally, an exhaust port 624 can be formed on the upper liquid storage tank 62. This exhaust port 624 allows gas to be discharged from the upper liquid storage tank 62 during the circulation of the liquid medium. The exhaust port 624 can be located on the side of the upper liquid storage tank 62 away from the outlet 622 of the upper liquid storage tank 62, which facilitates the timely discharge of excess gas from the liquid storage tank 62 during the circulation of the liquid medium. Furthermore, the exhaust port 624 and the liquid inlet 623 can be located at opposite ends of the upper liquid storage tank 62, respectively, to prevent the liquid medium just added to the liquid storage tank 6 from being discharged outside the liquid storage tank 6 through the exhaust port 624.

[0053] In addition, the lower liquid storage tank 61 can be used as a support for the upper liquid storage tank 62, power unit 5, evaporator 4 and heat pump device, etc., so that the lower liquid storage tank 61 is placed at the bottom of the dishwasher 100, and the upper liquid storage tank 62, power unit 5, evaporator 4 and heat pump device are placed above the lower liquid storage tank 61.

[0054] Specifically, such as Figure 4 As shown, a mounting surface 613 can be formed on the lower liquid storage tank 61, so that the upper liquid storage tank 62, power component 5, evaporator 4 and heat pump device and other devices can be mounted on the mounting surface 613.

[0055] To balance the weight distribution of the dishwasher 100, the size of the upper liquid reservoir 62 can be smaller than the size of the lower liquid reservoir 61. For example, at least one of the length and width of the upper liquid reservoir 62 is smaller than at least one of the length and width of the lower liquid reservoir 61. Thus, the upper liquid reservoir 62 can occupy a portion of the mounting surface 613, while the remaining components such as the power unit 5, evaporator 4, and heat pump can be distributed on the remaining area of ​​the mounting surface 613. The mounting surface 613 is divided into two adjacent areas (either left-right or front-back). One of these two areas can be used as a portion of the mounting surface 613 to house the upper liquid reservoir 62, while the other area is used as the remaining area of ​​the mounting surface 613 to house the power unit 5, evaporator 4, and heat pump. Preferably, the mounting surface 613 is divided into two adjacent front and rear areas. The liquid storage tank 62 is located on the rear area, and the power unit 5, evaporator 4, heat pump device and other components are located on the front area to further improve the balance of weight distribution of the dishwasher 100 chassis.

[0056] The evaporator 4 can also be mounted on the mounting surface 613. Furthermore, for the evaporator 4, the distance from the highest point of the evaporator 4 to the mounting surface 613 of the lower liquid storage tank 61 can be less than the distance from the highest point of the upper liquid storage tank 62 to the mounting surface 613 of the lower liquid storage tank 61. In other words, the distance between the evaporator 4 and the cleaning chamber can be greater than the distance between the upper liquid storage tank 62 and the cleaning chamber. In general, the highest point of the evaporator 4 is lower than the highest point of the upper liquid storage tank 62. This ensures that after the upper liquid storage tank 62 is filled with liquid medium, both the lower liquid storage tank 61 and the evaporator 4 can be filled with liquid medium, preventing insufficient heat exchange in the evaporator 4 due to a lack of liquid medium.

[0057] At least a portion of the evaporator 4 can be embedded in the lower liquid storage tank 61, so that when the lower liquid storage tank 61 is filled with liquid medium, the liquid medium in the lower liquid storage tank 61 can automatically flow into the evaporator 4. Thus, only a power component 5 needs to be provided between the evaporator 4 and the upper liquid storage tank 62 to realize the circulation of the liquid medium between the first liquid storage tank 61, the evaporator 4 and the second liquid storage tank 62.

[0058] Specifically, the mounting surface 613 of the lower liquid storage tank 61 has a mounting groove 614, and the evaporator 4 is embedded in the mounting groove 614, so that at least a portion of the evaporator 4 can be embedded in the lower liquid storage tank 61. In addition, an outlet 612 is formed in the mounting groove 614, and the lower liquid storage tank 61 is connected to the medium inlet 41 of the evaporator 4 through the outlet 612, so that when the lower liquid storage tank 61 is filled with liquid medium, the liquid medium in the lower liquid storage tank 61 can automatically flow into the evaporator 4.

[0059] Among them, such as Figure 5 As shown, the evaporator 4 can be cylindrical, with its medium inlet 41 located on the side wall of the evaporator 4. This allows for the formation of an outlet 612 adjacent to the medium inlet 41 on the wall of the mounting groove 614, reducing the length of the first pipe (not shown) connecting the outlet 612 and the medium inlet 41, and facilitating the installation of the first pipe. Furthermore, the medium outlet 42 of the evaporator 4 is located at the top of the evaporator 4, and the medium outlet 42 can be oriented towards the power unit 5 to facilitate the installation of a second pipe (not shown) connecting the medium outlet 42 and the power unit 5. Additionally, the refrigerant inlet 43 and refrigerant outlet 44 of the evaporator 4 can also be located at the top of the evaporator 4.

[0060] Among them, such as Figure 6 As shown, the evaporator 4 may include a container 47 and refrigerant pipes 45. The container 47 holds the liquid medium, and the refrigerant pipes 45 are arranged spirally within the container 47. This allows the liquid medium in the container 47 to exchange heat with the refrigerant in the refrigerant pipes 45. Furthermore, the spiral arrangement of the refrigerant pipes 45 increases the contact area between the refrigerant pipes 45 and the liquid medium in the container 47, thereby improving heat exchange efficiency. Further, the evaporator 4 may also include an inner pipe 46, which is inserted into the container 47, and the refrigerant pipes 45 are disposed between the container 47 and the inner pipe 46. In this design, the outlet (i.e., the medium outlet) of the inner tube 46 and the medium inlet are located at the same end of the container 47. In this way, the liquid medium first enters the container 47 from one end, then flows to the other end of the container 47, and then flows through the inner tube 46 back to one end of the container 47 and out of the evaporator from one end of the container 47. This allows the liquid medium to flow fully within the evaporator, improving the temperature uniformity of the liquid medium within the evaporator and thus improving the heat exchange efficiency of the evaporator.

[0061] The power component 5 can also be disposed on the mounting surface 613. Furthermore, the power component 5 can also be embedded in the mounting groove 614.

[0062] Additionally, a protruding connecting portion may be formed on the lower liquid storage tank 61 to connect the input end of the power component 5 and the medium outlet 42 of the evaporator 4. This connecting portion also allows a mounting position of the lower liquid storage tank 61 on its mounting surface 613, with dimensions adapted to the power component 5, to be precisely fitted into the mounting position for secure fixation. Specifically, the connecting portion may have an outlet and an inlet. The inlet of the connecting portion connects to the medium outlet 42 of the evaporator 4, and the outlet of the connecting portion connects to the input end of the power component 5.

[0063] In addition, power component 5 can be a pump or other power device.

[0064] The heat exchange device may include heaters 7 disposed in the first liquid storage tank 61 and / or the second liquid storage tank 62. That is, the heat exchange device may include a first heater disposed in the first liquid storage tank 61 and / or a second heater disposed in the second liquid storage tank 62, so as to heat the liquid medium in the first liquid storage tank 61 and / or the second liquid storage tank 62 through the first heater and / or the second heater, so as to maintain the temperature of the liquid medium in the first liquid storage tank 61 and the second liquid storage tank 62 within a suitable temperature range that can heat the refrigerant in the evaporator 4.

[0065] The first heater can be a heating tube assembly or a heating wire assembly. Preferably, the first heater can be a heating wire assembly to control the temperature of the liquid medium in the first liquid storage tank 61 within a suitable temperature range (e.g., 5-20°C) and improve the accuracy of temperature control of the liquid medium in the first liquid storage tank 61.

[0066] Specifically, the first heater may include a first heating wire and a first conductive tape connected in a heat transfer manner. This allows the heat from the first heating wire to be evenly transferred to the liquid medium within the first storage tank 61 via the first conductive tape, achieving the purpose of uniformly heating the liquid medium within the first storage tank 61. Furthermore, the first heating wire may be encased within the first conductive tape, preventing direct contact between the heating wire and the liquid medium within the first storage tank 61. The heating wire indirectly transfers heat to the liquid medium through the first conductive tape, thereby improving the temperature uniformity of the liquid medium within the first storage tank 61.

[0067] In addition, the first heater can be installed inside or outside the first liquid storage tank 61, and there is no specific limitation.

[0068] Alternatively, the second heater may also include a second heating wire and a second conductive tape connected in a heat transfer manner. The relative positions of the second heating wire, the second conductive tape, and the second liquid storage tank 62 can be the same as the relative positions of the first heating wire, the first conductive tape, and the first liquid storage tank 61, and will not be elaborated further here.

[0069] Based on the overall structure and heat exchange device of the dishwasher 100 described above, this application further improves the cooperation between the heat exchange device and the heat pump device in the following ways.

[0070] like Figure 7 As shown, during the assembly of the dishwasher 100, the heat pump device and the evaporator 4 can be embedded into the liquid storage tank 61 located below. That is, the heat pump device and the evaporator 4 are assembled together first, and then the assembled components are embedded into the liquid storage tank 61 located below, so as to achieve modularity and simplification.

[0071] In addition, the inlet 21 of the condenser 2 can be higher than the outlet 121 of the water cup 12, and the outlet 121 of the water cup 12 can be higher than the drain 122 of the water cup 12, so that the remaining washing water in the water cup 12 (the washing water below the outlet 121 of the water cup 12) cannot enter the condenser 2 at the end of the cycle, and the washing water in the condenser 2 has been completely drained, so that there is no residual water in the condenser 2 at the end of the cycle.

[0072] Alternatively, the condenser 2 can be positioned above the evaporator 4 to facilitate the installation of connecting pipes between the condenser 2 and the evaporator 4 (not shown in the figure), and to easily meet the installation height requirements of the evaporator 4 and the condenser 2. Furthermore, the water inlet 21, refrigerant inlet 23, and refrigerant outlet 24 of the condenser 2, and the medium inlet 41, refrigerant outlet 44, and refrigerant inlet 43 of the evaporator 4 can all face the same direction, for example, towards the power component 5, which also facilitates the installation of connecting pipes between the condenser 2 and the evaporator 4. Additionally, the water inlet 21, refrigerant inlet 23, and refrigerant outlet 24 of the condenser 2 can all be located at the top of the condenser 2, so that the axis of the condenser 2 is parallel to the width direction of the first liquid storage tank 61.

[0073] Furthermore, the evaporator 4 and the condenser 2 can be arranged side by side. And the axis of the condenser 2 can be parallel to the axis of the evaporator 4.

[0074] The condenser 2 and the evaporator 4 can be heat exchangers with the same structure and size to facilitate their assembly together. Furthermore, the parameters of the condenser 2 and the evaporator 4 can be identical, that is, the condenser 2 and the evaporator 4 can have completely identical structural parameters and heat exchange performance.

[0075] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A heat exchange device, characterized in that, For use in a dishwasher, the heat exchange device includes: An evaporator having a medium inlet and a medium outlet; A first liquid storage tank, which is connected to the medium inlet; The second liquid storage tank is connected to the medium outlet and the first liquid storage tank. The second liquid storage tank has an inlet and an outlet. A power unit is disposed between the evaporator and the first liquid storage tank, or between the evaporator and the second liquid storage tank, to drive the liquid medium to circulate between the first liquid storage tank, the evaporator and the second liquid storage tank; The second liquid storage tank and the evaporator are disposed on the mounting surface of the first liquid storage tank, and the distance from the highest point of the second liquid storage tank to the mounting surface is greater than the distance from the highest point of the evaporator to the mounting surface.

2. The heat exchange device according to claim 1, characterized in that, The mounting surface has a mounting groove, and the evaporator is embedded in the mounting groove; The mounting groove has an outlet, which is connected to the medium inlet.

3. The heat exchange device according to claim 2, characterized in that, The first liquid storage tank has an inlet, and the second liquid storage tank is connected to the inlet; The outlet and the inlet are located at opposite corners of the first liquid storage tank.

4. The heat exchange device according to claim 2, characterized in that, The medium inlet is located on the side wall of the evaporator, and the medium outlet is located at the top of the evaporator.

5. The heat exchange device according to claim 1, characterized in that, The second liquid storage tank has an inlet and an outlet. The outlet of the second liquid storage tank is connected to the first liquid storage tank, and the inlet of the second liquid storage tank is connected to the medium outlet of the evaporator. The inlet is located on the side of the outlet of the second liquid storage tank away from the inlet of the second liquid storage tank, and the outlet is located on the side of the inlet of the second liquid storage tank away from the outlet of the second liquid storage tank.

6. The heat exchange device according to claim 1, characterized in that, The heat exchange device includes a first heater disposed in the first liquid storage tank and / or a second heater disposed in the second liquid storage tank.

7. A dishwasher, characterized in that, The dishwasher includes the heat exchange device according to any one of claims 1-6.

8. The dishwasher according to claim 7, characterized in that, The dishwasher includes a heat pump device and a water cup. The heat pump device includes a condenser. The outlet of the water cup is connected to the inlet of the condenser, and the drain outlet of the water cup is used to discharge wastewater. The condenser's inlet is higher than the dishwasher's cup outlet, and the cup outlet is higher than the cup's drain outlet.

9. The dishwasher according to claim 8, characterized in that, The refrigerant outlet, refrigerant inlet, and water outlet of the condenser, as well as the medium outlet, refrigerant outlet, and refrigerant inlet of the evaporator, are all arranged in the same direction.

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