Dishwasher

Abstract

The present invention relates to the technical field of household appliances, and particularly relates to a dishwasher, comprising: an inner tank, which is provided with an air exhaust port thereon; a spray arm assembly, arranged in the inner tank; a water tank, arranged below the inner tank and communicated with the inner tank; a heat pump system, including a compressor, a first condenser and an evaporator, the first condenser having a first refrigerant inlet, a first refrigerant outlet, a first heat exchange inlet and a first heat exchange outlet, the first refrigerant inlet being communicated with the outlet of the compressor, the water tank being communicated with the first heat exchange inlet through a first pipeline, a water pump being arranged on the first pipeline, the air exhaust port being communicated with the first heat exchange inlet through a second pipeline, a fan being arranged on the second pipeline, the first heat exchange outlet being communicated with the spray arm assembly, the first end of the evaporator being communicated with the first refrigerant outlet, and the second end of the evaporator being communicated with the inlet of the compressor; a pipeline switching structure, having a first state in which the water tank is communicated with the first heat exchange inlet and a second state in which the air exhaust port is communicated with the first heat exchange inlet.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a dishwasher. Background Art

[0002] A dishwasher is a device for automatically cleaning tableware such as bowls, chopsticks, plates, dishes, knives, and forks. Conventional dishwashers generally heat water by means of electric heating to wash tableware, consuming a large amount of power and having low efficiency. After washing, the drying is not thorough, and residual water is likely to breed bacteria.

[0003] CN105300079A discloses a dehumidification device with a vortex tube, which improves the drying temperature through the vortex tube structure and reduces energy consumption. This dehumidification device increases the drying temperature through the vortex tube and cannot increase the temperature during washing.

[0004] CN112568851A discloses a heat pump type dishwasher and its control method. The air is heated by a heat pump system and introduced into a water tank to heat water, which can heat water and drying air simultaneously. However, the heating of the water circuit system needs to be conducted through air, resulting in low efficiency.

[0005] Therefore, the existing dishwashers cannot comprehensively improve the efficiency of washing and drying. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the existing dishwashers cannot comprehensively improve the efficiency of washing and drying, so as to provide a dishwasher that can comprehensively improve the efficiency of washing and drying.

[0007] To solve the above technical problem, a dishwasher provided by the present invention includes: an inner container, on which an air outlet is provided; a spray arm assembly disposed in the inner container; a water tank disposed below the inner container and communicated with the inner container; a heat pump system including a compressor, a first condenser, and an evaporator. The first condenser has a first refrigerant inlet, a first refrigerant outlet, a first heat exchange inlet, and a first heat exchange outlet. The first refrigerant inlet is communicated with the outlet of the compressor. The water tank is communicated with the first heat exchange inlet through a first pipeline, and a water pump is provided on the first pipeline. The air outlet is communicated with the first heat exchange inlet through a second pipeline, and a fan is provided on the second pipeline. The first heat exchange outlet is communicated with the spray arm assembly. The first end of the evaporator is communicated with the first refrigerant outlet, and the second end of the evaporator is communicated with the inlet of the compressor; a pipeline switching structure having a first state in which the water tank is communicated with the first heat exchange inlet and a second state in which the air outlet is communicated with the first heat exchange inlet.

[0008] Optionally, the heat pump system further includes a second condenser and a vortex tube. The second condenser has a second refrigerant inlet, a second refrigerant outlet, a second heat exchange inlet, and a second heat exchange outlet. The second heat exchange inlet is communicated with the first heat exchange outlet, the second heat exchange outlet is communicated with the spray arm assembly, the second refrigerant outlet is communicated with the inlet of the compressor, the vortex tube has a high-pressure fluid inlet, a cold end outlet, and a hot end outlet. The high-pressure fluid inlet is communicated with the first refrigerant outlet, the cold end outlet is communicated with the first end of the evaporator, and the hot end outlet is communicated with the second refrigerant inlet.

[0009] Optionally, a flow regulating valve is provided at the hot end outlet.

[0010] Optionally, a temperature sensor is provided at the hot end outlet. The dishwasher further includes a controller, and the controller is communicatively connected to the temperature sensor and the flow regulating valve.

[0011] Optionally, the air outlet has a first outlet and a second outlet. The first outlet is connected to the second pipeline, the second outlet faces the evaporator, and an air outlet regulating valve is provided at the air outlet. The air outlet regulating valve has a first position for discharging air from the first outlet and a second position for discharging air from the second outlet.

[0012] Optionally, a humidity sensor is provided at the air outlet. The controller is communicatively connected to the humidity sensor and the air outlet regulating valve. When the humidity sensor detects that the humidity at the air outlet is greater than a preset humidity, the controller can control the air outlet regulating valve to be adjusted to the second position. When the humidity sensor detects that the humidity at the air outlet is less than or equal to the preset humidity, the controller can control the air outlet regulating valve to be adjusted to the first position.

[0013] Optionally, the controller is communicatively connected to the pipeline switching structure.

[0014] Optionally, the second pipeline is connected to the first pipeline, and the pipeline switching structure is a three-way valve provided at the connection point of the second pipeline and the first pipeline.

[0015] Optionally, the spray arm assembly includes an upper spray arm and a lower spray arm that are communicated with each other.

[0016] The technical solution of the present invention has the following advantages:

[0017] 1. The dishwasher provided by the present invention, when in the washing operation, switches the pipeline switching structure to the first state. At this time, the sink is communicated with the first heat exchange inlet, and the exhaust port is not communicated with the first heat exchange inlet. The low-temperature and low-pressure working medium is compressed by the compressor to become a high-temperature and high-pressure working medium, and enters the first condenser through the first refrigerant inlet. The water pump sends water into the first condenser to exchange heat with the high-temperature and high-pressure working medium. The water is heated in the first condenser, and then the spray arm assembly is used to wash the tableware in the inner tank. The water in the inner tank is collected by the sink and then enters the first pipeline again for recycling. The low-temperature and low-pressure working medium cooled by the first condenser exchanges heat with the outside air in the evaporator and then enters the compressor for compression and temperature rise. When the dishwasher is in the drying operation, after the sink drains, the pipeline switching structure is switched to the second state. At this time, the sink is not communicated with the first heat exchange inlet, and the exhaust port is communicated with the first heat exchange inlet. The low-temperature and low-pressure working medium is compressed by the compressor to become a high-temperature and high-pressure working medium, and enters the first condenser through the first refrigerant inlet. The fan sends the air in the inner tank into the first condenser through the second pipeline to exchange heat with the high-temperature and high-pressure working medium. The air is heated in the first condenser, and then the spray arm assembly is used to dry the tableware in the inner tank. Then the air in the inner tank can enter the second pipeline again and circulate continuously for sufficient drying. Therefore, this dishwasher can heat water and air, can efficiently increase the temperature of the washing water and the drying air, and at the same time blows air through the spray arm assembly to improve the drying effect. Therefore, the washing and drying efficiency can be comprehensively improved.

[0018] 2. The dishwasher provided by the present invention, the heat pump system further includes a second condenser and a vortex tube. The second condenser has a second refrigerant inlet, a second refrigerant outlet, a second heat exchange inlet and a second heat exchange outlet. The second heat exchange inlet is communicated with the first heat exchange outlet. The second heat exchange outlet is communicated with the spray arm assembly. The second refrigerant outlet is communicated with the inlet of the compressor. The vortex tube has a high-pressure fluid inlet, a cold end outlet and a hot end outlet. The high-pressure fluid inlet is communicated with the first refrigerant outlet. The cold end outlet is communicated with the first end of the evaporator. The hot end outlet is communicated with the second refrigerant inlet. The heat pump system can perform multi-stage heating on water and air, so as to more efficiently increase the temperature of the washing water and the drying air. The high-pressure fluid is split into cold and hot fluids by the vortex tube, and the fluid at the hot end outlet is reused to improve the efficiency of the heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic diagram of a dishwasher provided in an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of a dishwasher provided in another embodiment of the present invention;

[0022] Figure 3 is Figure 1 Schematic structural diagram of the vortex tube shown;

[0023] Figure 4 is Figure 3 Cross-sectional view of the vortex tube in

[0024] Explanation of reference numerals:

[0025] 1, inner tank; 2, air exhaust port; 3, sink; 4, upper spray arm; 5, lower spray arm; 6, compressor; 7, first condenser; 701, first refrigerant inlet; 702, first refrigerant outlet; 703, first heat exchange inlet; 704, first heat exchange outlet; 8, evaporator; 9, first pipeline; 10, water pump; 11, second pipeline; 12, fan; 13, second condenser; 1301, second refrigerant inlet; 1302, second refrigerant outlet; 1303, second heat exchange inlet; 1304, second heat exchange outlet; 14, vortex tube; 1401, high-pressure fluid inlet; 1402, cold end outlet; 1403, hot end outlet; 1404, flow regulating valve; 1405, temperature sensor; 15, air outlet regulating valve; 16, humidity sensor; 17, three-way valve. Detailed implementation manners

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Embodiment

[0031] A dishwasher is a device for automatically cleaning tableware such as bowls, chopsticks, plates, dishes, knives, and forks. Conventional dishwashers generally heat water by electric heating to wash tableware, consuming a large amount of power, having low efficiency, and not thoroughly drying after washing, and residual water is prone to breed bacteria.

[0032] Existing dishwashers cannot comprehensively improve the efficiency of washing and drying.

[0033] For this reason, this embodiment provides a dishwasher that can comprehensively improve the efficiency of washing and drying.

[0034] In one embodiment, as Figure 1 and Figure 2 shown, the dishwasher includes an inner container 1, a spray arm assembly, a water tank 3, a heat pump system, and a pipeline switching structure.

[0035] Among them, an air outlet 2 is provided on the inner container 1; the spray arm assembly is arranged in the inner container 1; the water tank 3 is arranged below the inner container 1 and is communicated with the inner container 1; the heat pump system includes a compressor 6, a first condenser 7, and an evaporator 8. The first condenser 7 has a first refrigerant inlet 701, a first refrigerant outlet 702, a first heat exchange inlet 703, and a first heat exchange outlet 704. The first refrigerant inlet 701 is communicated with the outlet of the compressor 6. The water tank 3 is communicated with the first heat exchange inlet 703 through a first pipeline 9. A water pump 10 is provided on the first pipeline 9. The air outlet 2 is communicated with the first heat exchange inlet 703 through a second pipeline 11. A fan 12 is provided on the second pipeline 11. The first heat exchange outlet 704 is communicated with the spray arm assembly. The first end of the evaporator 8 is communicated with the first refrigerant outlet 702, and the second end of the evaporator 8 is communicated with the inlet of the compressor 6; the pipeline switching structure has a first state in which the water tank 3 is communicated with the first heat exchange inlet 703 and a second state in which the air outlet 2 is communicated with the first heat exchange inlet 703.

[0036] In this embodiment, when the dishwasher is in the washing operation, the pipeline switching structure is switched to the first state. At this time, the water tank 3 is communicated with the first heat exchange inlet 703, and the air outlet 2 is not communicated with the first heat exchange inlet 703. The low-temperature and low-pressure working medium is compressed by the compressor 6 to become a high-temperature and high-pressure working medium, and enters the first condenser 7 through the first refrigerant inlet 701. The water pump 10 sends water into the first condenser 7 to exchange heat with the high-temperature and high-pressure working medium. The water is heated in the first condenser 7, and then the spray arm assembly is used to wash the tableware in the inner tank 1. The water in the inner tank 1 is collected by the water tank 3 and then enters the first pipeline 9 again for recycling. After the low-temperature and low-pressure working medium cooled by the first condenser 7 exchanges heat with the outside air in the evaporator 8, it enters the compressor 6 for compression and temperature rise; when the dishwasher is in the drying operation, after the water tank 3 finishes draining, the pipeline switching structure is switched to the second state. At this time, the water tank 3 is not communicated with the first heat exchange inlet 703, and the air outlet 2 is communicated with the first heat exchange inlet 703. The low-temperature and low-pressure working medium is compressed by the compressor 6 to become a high-temperature and high-pressure working medium, and enters the first condenser 7 through the first refrigerant inlet 701. The fan 12 sends the air in the inner tank 1 into the first condenser 7 through the second pipeline 11 to exchange heat with the high-temperature and high-pressure working medium. The air is heated in the first condenser 7, and then the spray arm assembly is used to dry the tableware in the inner tank 1. Then the air in the inner tank 1 can enter the second pipeline 11 again and circulate continuously for sufficient drying. Therefore, this dishwasher can heat water and air, can efficiently increase the temperature of the washing water and the drying air, and at the same time, through the air outlet of the spray arm assembly, the drying effect is improved. Therefore, the washing and drying efficiency can be comprehensively improved.

[0037] It should be noted that the inner tank 1 has an air inlet communicating with the outside. During drying, air continuously enters the inner tank 1 through the air inlet and then enters the second pipeline 11.

[0038] On the basis of the above embodiment, in a preferred embodiment, the heat pump system further includes a second condenser 13 and a vortex tube 14. The second condenser 13 has a second refrigerant inlet 1301, a second refrigerant outlet 1302, a second heat exchange inlet 1303 and a second heat exchange outlet 1304. The second heat exchange inlet 1303 is communicated with the first heat exchange outlet 704, the second heat exchange outlet 1304 is communicated with the spray arm assembly, and the second refrigerant outlet 1302 is communicated with the inlet of the compressor 6, as Figure 3 and Figure 4As shown, the vortex tube 14 has a high-pressure fluid inlet 1401, a cold-end outlet 1402, and a hot-end outlet 1403. The high-pressure fluid inlet 1401 is in communication with the first refrigerant outlet 702. The cold-end outlet 1402 is in communication with the first end of the evaporator 8. The hot-end outlet 1403 is in communication with the second refrigerant inlet 1301. In this embodiment, when the dishwasher is in the washing operation, the pipeline switching structure is switched to the first state. At this time, the sink 3 is in communication with the first heat exchange inlet 703, and the exhaust port 2 is not in communication with the first heat exchange inlet 703. The low-temperature and low-pressure working medium is compressed by the compressor 6 to become a high-temperature and high-pressure working medium, and enters the first condenser 7 through the first refrigerant inlet 701. The water pump 10 sends water into the first condenser 7 to exchange heat with the high-temperature and high-pressure working medium. The water is heated in the first condenser 7 and then enters the second condenser 13 again. The working medium (compressed gas) cooled by the first condenser 7 enters the vortex tube 14 through the high-pressure fluid inlet 1401, generating a very high tangential velocity to form a high-speed swirl. The diameter of the vortex tube 14 is smaller at the cold-end outlet 1402 and larger at the hot-end outlet 1403. While rotating, the compressed gas flows axially towards the hot end. During the process of flowing towards the hot-end outlet 1403, the central pressure decreases and the temperature drops. The gas near the wall surface is compressed, and there is frictional dissipation, causing the temperature to rise. The high-temperature compressed gas flows out from the hot-end outlet 1403, and the central air flow returns and flows out from the cold-end outlet 1402, entering the evaporator 8. After heat exchange with the outside air in the evaporator 8, it enters the compressor 6 for compression and temperature rise. The high-temperature compressed gas enters the second condenser 13 through the second refrigerant inlet 1301 to heat the water again. The water after heat exchange in the second condenser 13 is used by the spray arm assembly to wash the tableware in the inner tank 1. The water in the inner tank 1 is collected by the sink 3 and then enters the first pipeline 9 again for recycling. The high-temperature working medium cooled by the second condenser 13 is mixed with the working medium flowing out from the evaporator 8 and then enters the compressor 6 for compression and temperature rise; when the dishwasher is in the drying operation, after the sink 3 finishes draining, the pipeline switching structure is switched to the second state. At this time, the sink 3 is not in communication with the first heat exchange inlet 703, and the exhaust port 2 is in communication with the first heat exchange inlet 703. The low-temperature and low-pressure working medium is compressed by the compressor 6 to become a high-temperature and high-pressure working medium, and enters the first condenser 7 through the first refrigerant inlet 701. The fan 12 sends the air in the inner tank 1 into the first condenser 7 through the second pipeline 11 to exchange heat with the high-temperature and high-pressure working medium. The air is heated in the first condenser 7 and then enters the second condenser 13 for heating again. Then it is used by the spray arm assembly to dry the tableware in the inner tank 1. Then the air in the inner tank 1 can enter the second pipeline 11 again and circulate continuously for sufficient drying. The working process of the heat pump system is the same during the drying operation and the washing operation.Therefore, the heat pump system can perform multi-stage heating on water and air, thereby more efficiently increasing the temperature of the washing water and the drying air. The high-pressure fluid is split into hot and cold fluids by the vortex tube 14, and the fluid at the hot end outlet 1403 is reused to improve the efficiency of the heat pump system.

[0039] On the basis of the above embodiment, in a preferred embodiment, a flow regulating valve 1404 is provided at the hot end outlet 1403. In this embodiment, the temperature of the hot end outlet 1403 can be controlled by adjusting the flow regulating valve 1404.

[0040] On the basis of the above embodiment, in a preferred embodiment, a temperature sensor 1405 is provided at the hot end outlet 1403, and the dishwasher further includes a controller that is communicatively connected to the temperature sensor 1405 and the flow regulating valve 1404. In this embodiment, the temperature of the hot end outlet 1403 is monitored by the temperature sensor 1405, and the temperature of the hot end outlet 1403 is controlled by adjusting the flow regulating valve 1404. The temperature of the hot end outlet 1403 can be automatically regulated by the controller.

[0041] On the basis of the above embodiment, in a preferred embodiment, the air outlet 2 has a first outlet and a second outlet. The first outlet is connected to the second pipeline 11, and the second outlet faces the evaporator 8. An air outlet regulating valve 15 is provided at the air outlet 2. The air outlet regulating valve 15 has a first position for discharging air from the first outlet and a second position for discharging air from the second outlet. In this embodiment, by providing the air outlet regulating valve 15 at the air outlet 2, when the humidity at the air outlet 2 is relatively high, the air outlet regulating valve 15 can be adjusted to the second position, and the air is discharged through the second outlet. Since the second outlet faces the evaporator 8, heat exchange can be performed with the evaporator 8 for dehumidification and cooling, thereby improving the heat exchange efficiency of the evaporator 8. After the drying operation has been carried out for a period of time, the humidity at the air outlet 2 decreases, and the air outlet regulating valve 15 is adjusted to the first position, and the air can enter the second pipeline 11. Since the air itself has a relatively high temperature, the heat exchange power consumption of the heat pump system can be reduced.

[0042] On the basis of the above embodiments, in a preferred embodiment, a humidity sensor 16 is provided at the air outlet 2. The controller is communicatively connected to the humidity sensor 16 and the air outlet regulating valve 15. When the humidity detected by the humidity sensor 16 at the air outlet 2 is greater than the preset humidity, the controller can control the air outlet regulating valve 15 to be adjusted to the second position. When the humidity detected by the humidity sensor 16 at the air outlet 2 is less than or equal to the preset humidity, the controller can control the air outlet regulating valve 15 to be adjusted to the first position. In this embodiment, automatic switching of the air outlet regulating valve 15 can be achieved. When the humidity at the air outlet 2 is relatively high, the air outlet regulating valve 15 is automatically adjusted to the second position, and the air is discharged through the second outlet. Since the second outlet faces the evaporator 8, heat exchange can be carried out with the evaporator 8 for dehumidification and cooling, improving the heat exchange efficiency of the evaporator 8. After the drying operation has been carried out for a period of time, the humidity at the air outlet 2 drops, and the air outlet regulating valve 15 is automatically adjusted to the first position, and the air can enter the second pipeline 11. Since the air itself has a relatively high temperature, the heat exchange power consumption of the heat pump system can be reduced.

[0043] On the basis of the above embodiments, in a preferred embodiment, the controller is communicatively connected to the pipeline switching structure. In this embodiment, the switching function of the pipeline switching structure can be automatically realized. For example, when the dishwasher is in the washing operation, the pipeline switching structure is automatically switched to the first state, and when the dishwasher is in the drying operation, the pipeline switching structure is automatically switched to the second state.

[0044] On the basis of the above embodiments, in a preferred embodiment, the second pipeline 11 is connected to the first pipeline 9, and the pipeline switching structure is a three-way valve 17 provided at the connection point of the second pipeline 11 and the first pipeline 9. In this embodiment, the structure of the pipeline switching structure is simple and convenient to control. In an alternative embodiment, the pipeline switching structure may include a first valve provided on the first pipeline 9 and a second valve provided on the second pipeline 11. When the first valve is opened and the second valve is closed, the pipeline switching structure is in the first state, and when the first valve is closed and the second valve is opened, the pipeline switching structure is in the second state.

[0045] On the basis of the above embodiments, in a preferred embodiment, the spray arm assembly includes an upper spray arm 4 and a lower spray arm 5 that are interconnected. In this embodiment, water spraying for washing or air spraying for drying can be carried out simultaneously through the upper spray arm 4 and the lower spray arm 5, with relatively high efficiency.

[0046] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the embodiments. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to enumerate all the embodiments here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A dishwasher, characterized in that, Comprising: An inner container (1) provided with an air exhaust opening (2); A spray arm assembly disposed in the inner container (1); A water tank (3) disposed below the inner container (1) and communicating with the inner container (1); A heat pump system including a compressor (6), a first condenser (7) and an evaporator (8), the first condenser (7) having a first refrigerant inlet (701), a first refrigerant outlet (702), a first heat exchange inlet (703) and a first heat exchange outlet (704), the first refrigerant inlet (701) communicating with the outlet of the compressor (6), the water tank (3) communicating with the first heat exchange inlet (703) through a first pipeline (9), a water pump (10) being provided on the first pipeline (9), the air exhaust opening (2) communicating with the first heat exchange inlet (703) through a second pipeline (11), a blower (12) being provided on the second pipeline (11), the first heat exchange outlet (704) communicating with the spray arm assembly, a first end of the evaporator (8) communicating with the first refrigerant outlet (702), and a second end of the evaporator (8) communicating with the inlet of the compressor (6); A pipeline switching structure having a first state in which the water tank (3) communicates with the first heat exchange inlet (703) and a second state in which the air exhaust opening (2) communicates with the first heat exchange inlet (703); The heat pump system further includes a second condenser (13) and a vortex tube (14), the second condenser (13) having a second refrigerant inlet (1301), a second refrigerant outlet (1302), a second heat exchange inlet (1303) and a second heat exchange outlet (1304), the second heat exchange inlet (1303) communicating with the first heat exchange outlet (704), the second heat exchange outlet (1304) communicating with the spray arm assembly, the second refrigerant outlet (1302) communicating with the inlet of the compressor (6), the vortex tube (14) having a high-pressure fluid inlet (1401), a cold end outlet (1402) and a hot end outlet (1403), the high-pressure fluid inlet (1401) communicating with the first refrigerant outlet (702), the cold end outlet (1402) communicating with the first end of the evaporator (8), and the hot end outlet (1403) communicating with the second refrigerant inlet (1301).

2. The dishwasher according to claim 1, characterized in that, A flow regulating valve (1404) is provided at the hot end outlet (1403).

3. The dishwasher according to claim 2, wherein, A temperature sensor (1405) is provided at the hot end outlet (1403), and the dishwasher further includes a controller, the controller being communicatively connected to the temperature sensor (1405) and the flow regulating valve (1404).

4. The dishwasher according to claim 3, characterized in that, The air exhaust opening (2) has a first outlet and a second outlet, the first outlet connecting to the second pipeline (11), the second outlet being opposite to the evaporator (8), an air outlet regulating valve (15) being provided at the air exhaust opening (2), the air outlet regulating valve (15) having a first position for discharging air from the first outlet and a second position for discharging air from the second outlet.

5. The dishwasher according to claim 4, characterized in that, A humidity sensor (16) is provided at the air exhaust port (2). The controller is communicatively connected to the humidity sensor (16) and the air outlet regulating valve (15). When the humidity sensor (16) detects that the humidity at the air exhaust port (2) is greater than a preset humidity, the controller can control the air outlet regulating valve (15) to be adjusted to the second position. When the humidity sensor (16) detects that the humidity at the air exhaust port (2) is less than or equal to the preset humidity, the controller can control the air outlet regulating valve (15) to be adjusted to the first position.

6. The dishwasher according to any one of claims 3 to 5, characterized in that, The controller is communicatively connected to the pipeline switching structure.

7. The dishwasher according to claim 6, wherein, The second pipeline (11) is connected to the first pipeline (9), and the pipeline switching structure is a three-way valve (17) provided at the connection point of the second pipeline (11) and the first pipeline (9).

8. The dishwasher according to any one of claims 1 - 5, characterized in that, The spray arm assembly includes an upper spray arm (4) and a lower spray arm (5) that are communicatively connected to each other.

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