CN114795049A - Dish washing machine - Google Patents

Abstract

The invention relates to the technical field of household appliances, in particular to a dish-washing machine, which comprises: the inner container is provided with an air outlet; the spray arm assembly is arranged in the inner container; the water tank is arranged below the inner container and communicated with the inner container; the heat pump system comprises a compressor, a first condenser and an evaporator, wherein the first condenser is provided with 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, a water tank is communicated with the first heat exchange inlet through a first pipeline, a water pump is arranged on the first pipeline, an air outlet is communicated with the first heat exchange inlet through a second pipeline, a fan is arranged on the second pipeline, the first heat exchange outlet is communicated with a 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; the pipeline switching structure is provided with a first state which enables the water tank to be communicated with the first heat exchange inlet and a second state which enables the air outlet to be communicated with the first heat exchange inlet.

Description

Dish washing machine

Technical Field

The invention relates to the technical field of household appliances, in particular to a dish washing machine.

Background

The dish washer is used to automatically clean tableware such as dish, chopsticks, dish, knife and fork. The traditional dish washer generally washes tableware by heating water in an electric heating mode, so that the power consumption is high, the efficiency is low, the drying is not thorough after the washing, and bacteria are easily bred in residual water.

CN105300079A discloses a dehumidifying device with vortex tube, which increases drying temperature through the vortex tube structure, reduces energy consumption, and can not increase the temperature during washing.

CN112568851A discloses a heat pump type dish washer and a control method thereof, which uses a heat pump system to heat air, and introduces the air into a water tank to heat water, and can heat water and dry air at the same time, but the water path system needs to be heated by air conduction, and the efficiency is low.

Therefore, the existing dish washer cannot improve the washing and drying efficiency comprehensively.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect that the dishwasher in the prior art cannot fully improve the washing and drying efficiency, thereby providing a dishwasher capable of fully improving the washing and drying efficiency.

In order to solve the above technical problem, the present invention provides a dishwasher, comprising: the inner container is provided with an air outlet; the spray arm assembly is arranged in the inner container; the water tank is arranged below the inner container and communicated with the inner container; the heat pump system comprises a compressor, a first condenser and an evaporator, wherein the first condenser is provided with 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, a water pump is arranged on the first pipeline, the air outlet is communicated with the first heat exchange inlet through a second pipeline, a fan is arranged 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; and the pipeline switching structure is provided with a first state for communicating the water tank with the first heat exchange inlet and a second state for communicating the air outlet with the first heat exchange inlet.

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.

Optionally, a flow regulating valve is arranged at the hot end outlet.

Optionally, a temperature sensor is arranged at the hot end outlet, and the dishwasher further comprises a controller, wherein the controller is in communication connection with the temperature sensor and the flow regulating valve.

Optionally, the air outlet has a first outlet and a second outlet, the first outlet is connected to the second pipeline, the second outlet is opposite to the evaporator, and the air outlet is provided with an air outlet adjusting valve, and the air outlet adjusting valve has a first position for discharging air from the first outlet and a second position for discharging air from the second outlet.

Optionally, the air outlet is provided with a humidity sensor, the controller is in communication connection with the humidity sensor and the air outlet adjusting valve, the controller can control the air outlet adjusting valve to adjust to the second position when the humidity sensor detects that the humidity at the air outlet is greater than the preset humidity, and the air outlet adjusting valve is controlled to adjust to the first position when the humidity sensor detects that the humidity at the air outlet is less than or equal to the preset humidity.

Optionally, the controller is in communication with the pipeline switching structure.

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

Optionally, the spray arm assembly comprises an upper spray arm and a lower spray arm which are communicated with each other.

The technical scheme of the invention has the following advantages:

1. according to the dish washing machine provided by the invention, when the dish washing machine works in a washing mode, the pipeline switching structure is switched to a first state, at the moment, the water tank is communicated with the first heat exchange inlet, the air outlet is not communicated with the first heat exchange inlet, a low-temperature low-pressure working medium is compressed by the compressor to become a high-temperature high-pressure working medium, the high-temperature high-pressure working medium enters the first condenser through the first refrigerant inlet, the water pump sends water into the first condenser through the water to exchange heat with the high-temperature high-pressure working medium, the water is heated in the first condenser, then the tableware in the inner container is washed through the spray arm assembly, the water in the inner container enters the first pipeline again after being collected by the water tank for cyclic utilization, and the low-temperature low-pressure working medium cooled by the first condenser enters the compressor to be compressed and heated after being subjected to heat exchange with outside air in the evaporator; dish washer is at the stoving during operation, after the basin drainage, switch into the second state with pipeline switching structure, basin and first heat transfer import non-intercommunication this moment, the air exit and first heat transfer import intercommunication, low temperature low pressure working medium becomes high temperature high pressure working medium after the compressor compression, get into first condenser through first refrigerant import, the air in fan with the inner bag is sent into first condenser through the second pipeline, carry out the heat exchange with high temperature high pressure working medium, the air is heated in first condenser, then carry out the drying through the spray arm subassembly to the tableware in the inner bag, then the air in the inner bag can get into the second pipeline once more, constantly circulate, carry out abundant drying. Therefore, this dish washer can be to water and air heating, can high-efficient promotion washing water and dry air's temperature, simultaneously through the spray arm subassembly air-out, promotes drying effect, consequently can promote washing and drying efficiency comprehensively.

2. The invention provides a dishwasher, wherein the heat pump system further comprises a second condenser and a vortex tube, the second condenser is provided with 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 an inlet of the compressor, the vortex tube is provided with 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. The heat pump system can heat water and air in multiple stages, so that the temperatures of washing water and dry air can be increased more efficiently, high-pressure fluid is divided into cold and hot fluid by the vortex tube, the fluid at the outlet of the hot end is recycled, and the efficiency of the heat pump system is increased.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a dishwasher provided in an embodiment of the present invention;

FIG. 2 is a schematic view of a dishwasher provided in another embodiment of the present invention;

FIG. 3 is a schematic structural view of the vortex tube shown in FIG. 1;

FIG. 4 is a cross-sectional view of the vortex tube of FIG. 3.

Description of reference numerals:

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

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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

Examples

The dish washer is used to automatically clean tableware such as dish, chopsticks, dish, knife and fork. Traditional dish washer generally heats the water through electric heating's mode and washes the tableware, and consumed power is big, and is inefficient, dries thoroughly after the washing, and the residual water breeds the bacterium easily.

The existing dish washer can not improve the washing and drying efficiency comprehensively.

Therefore, the embodiment provides the dishwasher which can comprehensively improve the washing and drying efficiency.

In one embodiment, as shown in fig. 1 and 2, the dishwasher includes a tub 1, a spray arm assembly, a tub 3, a heat pump system, and a pipe switching structure.

Wherein, the inner container 1 is provided with an air outlet 2; 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 comprises a compressor 6, a first condenser 7 and an evaporator 8, wherein the first condenser 7 is provided with 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 an outlet of the compressor 6, a water tank 3 is communicated with the first heat exchange inlet 703 through a first pipeline 9, a water pump 10 is arranged on the first pipeline 9, an air outlet 2 is communicated with the first heat exchange inlet 703 through a second pipeline 11, a fan 12 is arranged on the second pipeline 11, the first heat exchange outlet 704 is communicated with a spray arm assembly, a first end of the evaporator 8 is communicated with the first refrigerant outlet 702, and a second end of the evaporator 8 is communicated with an inlet of the compressor 6; the pipe 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.

In the embodiment, when the dishwasher is used for washing, the pipeline switching structure is switched to a first state, at this time, the water tank 3 is communicated with the first heat exchange inlet 703, the air outlet 2 is not communicated with the first heat exchange inlet 703, a low-temperature low-pressure working medium is compressed by the compressor 6 to become a high-temperature high-pressure working medium, the high-temperature high-pressure working medium enters the first condenser 7 through the first refrigerant inlet 701, the water pump 10 sends water into the first condenser 7 through the water to exchange heat with the high-temperature high-pressure working medium, the water is heated in the first condenser 7, then tableware in the inner container 1 is washed through the spray arm assembly, the water in the inner container 1 is collected by the water tank 3 and then enters the first pipeline 9 again to be recycled, and the low-temperature low-pressure working medium cooled by the first condenser 7 enters the compressor 6 to be compressed and heated after exchanging heat with outside air in the evaporator 8; the dish washer is at the stoving during operation, after the basin 3 drainage, switch into the second state with pipeline switching structure, basin 3 and first heat transfer import 703 do not communicate this moment, air exit 2 and first heat transfer import 703 intercommunication, low temperature low pressure working medium becomes high temperature high pressure working medium after compressor 6 compresses, get into first condenser 7 through first refrigerant import 701, fan 12 sends the air in inner bag 1 into first condenser 7 through second pipeline 11, carry out the heat exchange with high temperature high pressure working medium, the air is heated in first condenser 7, later carry out the drying through the spray arm subassembly tableware in inner bag 1, later the air in inner bag 1 can get into second pipeline 11 once more, constantly circulate, carry out abundant drying. Therefore, this dish washer can be to water and air heating, can high-efficient promotion washing water and dry air's temperature, simultaneously through the spray arm subassembly air-out, promotes drying effect, consequently can promote washing and drying efficiency comprehensively.

It should be noted that the inner container 1 has an air inlet communicated with the outside, and during drying, air continuously enters the inner container 1 through the air inlet and then enters the second pipeline 11.

On the basis of the above embodiments, 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 shown in fig. 3 and 4, 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 communicated with the first refrigerant outlet 702, the cold-end outlet 1402 is communicated with the first end of the evaporator 8, and the hot-end outlet 1403 is communicated with the second refrigerant inlet 1301. In this embodiment, when the dishwasher is washing, 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, 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, the high-temperature and high-pressure working medium enters the first condenser 7 through the first refrigerant inlet 701, the water pump 10 sends the 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, then the water 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 to generate a high tangential velocity to form a high-speed vortex, the diameter of the vortex tube 14 at the cold end outlet 1402 is smaller, the diameter at the hot end outlet 1403 is larger, the compressed gas flows to the hot end along the axial direction while rotating, when the compressed gas flows to the hot end outlet 1403, the central pressure is reduced, the air temperature is reduced, the gas close to the wall surface is compressed and has friction dissipation, so that the air temperature is increased, the high-temperature compressed gas flows out from the hot end outlet 1403, the central air flow reflows and flows out from the cold end outlet 1402 to enter the evaporator 8, the high-temperature compressed gas enters the compressor 6 to be compressed and heated after exchanging heat with the outside air in the evaporator 8, the high-temperature compressed gas enters the second condenser 13 through the second refrigerant inlet 1301 to heat water again, the water after exchanging heat by the second condenser 13 washes tableware in the inner container 1 through the spray arm assembly, the water in the inner container 1 enters the first pipeline 9 again after being collected by the water tank 3 to be recycled, and 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 to be compressed and heated; when the dish washer is in 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, 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 container 1 into the first condenser 7 through the second pipeline 11, heat exchange is carried out with a high-temperature high-pressure working medium, the air is heated in the first condenser 7, then enters the second condenser 13 again for heating, then the tableware in the inner container 1 is dried by the spray arm component, then the air in the inner container 1 can enter the second pipeline 11 again, the circulation is continuous, the drying is fully carried out, and the working process of the heat pump system is the same when the drying work and the washing work are carried out. Therefore, the heat pump system can heat water and air in multiple stages, so that the temperatures of the washing water and the drying air can be increased more efficiently, the high-pressure fluid is divided into cold and hot fluids by the vortex tube 14, the fluids at the hot end outlet 1403 are reused, and the efficiency of the heat pump system is increased.

In addition to the above embodiments, 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 side outlet 1403 may be controlled by adjusting the flow regulating valve 1404.

On the basis of the above embodiments, in a preferred embodiment, a temperature sensor 1405 is provided at the hot end outlet 1403, and the dishwasher further includes a controller, and the controller is in communication connection with the temperature sensor 1405 and the flow regulating valve 1404. In this embodiment, the temperature of hot end outlet 1403 is monitored by temperature sensor 1405 and controlled by adjusting flow regulating valve 1404, and the temperature of hot end outlet 1403 can be automatically regulated by the controller.

In addition to the above embodiments, 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, the second outlet is opposite to the evaporator 8, an air outlet adjusting valve 15 is arranged at the air outlet 2, and the air outlet adjusting 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, through set up air-out governing valve 15 in air exit 2 department, when 2 humidity of air exit is higher, can adjust air-out governing valve 15 to the second position, the air is discharged through the second export, because the second export is relative with evaporimeter 8, consequently can carry out the heat exchange with evaporimeter 8, dehumidifies the cooling, promotes 8 heat exchange efficiency of evaporimeter. After drying operation is carried out for a period of time, the humidity of the air outlet 2 is reduced, the air outlet adjusting valve 15 is adjusted to the first position, air can enter the second pipeline 11, and the heat exchange power consumption of the heat pump system can be reduced due to the fact that the temperature of the air is high.

On the basis of the above embodiment, in a preferred embodiment, the air outlet 2 is provided with the humidity sensor 16, the controller is in communication connection with the humidity sensor 16 and the air outlet adjusting valve 15, the controller can control the air outlet adjusting valve 15 to adjust to the second position when the humidity sensor 16 detects that the humidity at the air outlet 2 is greater than the preset humidity, and control the air outlet adjusting valve 15 to adjust to the first position when the humidity sensor 16 detects that the humidity at the air outlet 2 is less than or equal to the preset humidity. In this embodiment, can realize the automatic switch-over of air-out governing valve 15, when 2 humidity of air exit is higher, air-out governing valve 15 automatically regulated to the second position, the air is discharged through the second export, because the second export is relative with evaporimeter 8, consequently can carry out the heat exchange with evaporimeter 8, dehumidify the cooling, promote 8 heat exchange efficiency of evaporimeter, after drying work carries out a period, 2 humidity of air exit descend, automatically adjust air-out governing valve 15 to the first position, the air can get into in the second pipeline 11, because air self temperature is higher, reducible heat pump system's heat exchange power consumption.

In a preferred embodiment, the controller is communicatively connected to the pipeline switching structure based on the above-described embodiments. In this embodiment, the switching function of the pipe switching mechanism may be automatically implemented, for example, when the dishwasher is in a washing operation, the pipe switching mechanism is automatically switched to the first state, and when the dishwasher is in a drying operation, the pipe switching mechanism is automatically switched to the second state.

In addition to the above-described 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 a connection point of the second pipeline 11 and the first pipeline 9. In the embodiment, the pipeline switching structure is simple in structure and convenient to control. In an alternative embodiment, the line switching arrangement may comprise a first valve arranged on the first line 9 and a second valve arranged on the second line 11, the line switching arrangement being in the first state when the first valve is open and the second valve is closed, and the line switching arrangement being in the second state when the first valve is closed and the second valve is open.

On the basis of the above embodiments, in a preferred embodiment, the spray arm assembly includes the upper spray arm 4 and the lower spray arm 5 which communicate with each other. In this embodiment, the water spray washing or the air spray drying can be simultaneously performed by the upper spray arm 4 and the lower spray arm 5, and the efficiency is high.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (9)

1. A dishwasher, comprising:

the inner container (1) is provided with an air outlet (2);

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 comprises a compressor (6), a first condenser (7) and an evaporator (8), wherein the first condenser (7) is provided with 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), a water tank (3) is communicated with the first heat exchange inlet (703) through a first pipeline (9), a water pump (10) is arranged on the first pipeline (9), an air outlet (2) is communicated with the first heat exchange inlet (703) through a second pipeline (11), a fan (12) is arranged on the second pipeline (11), the first heat exchange outlet (704) is communicated with a spray arm assembly, and a first end of the evaporator (8) is communicated with the first refrigerant outlet (702), the second end of the evaporator (8) is communicated with the inlet of the compressor (6);

and the pipeline switching structure is provided with a first state which enables the water tank (3) to be communicated with the first heat exchange inlet (703) and a second state which enables the air outlet (2) to be communicated with the first heat exchange inlet (703).

2. A dishwasher according to claim 1, characterized in that the heat pump system further comprises 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) being in communication with the first heat exchange outlet (704), the second heat exchange outlet (1304) being in communication with the spray arm assembly, the second refrigerant outlet (1302) being in communication with an 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) being in communication with the first refrigerant outlet (702), the cold end outlet (1402) being in communication with a first end of the evaporator (8), the hot side outlet (1403) is communicated with the second refrigerant inlet (1301).

3. The dishwasher of claim 2, characterized in that a flow regulating valve (1404) is provided at the hot end outlet (1403).

4. The dishwasher of claim 3, characterized in that a temperature sensor (1405) is provided at the hot end outlet (1403), the dishwasher further comprising a controller communicatively connected to the temperature sensor (1405) and the flow regulating valve (1404).

5. The dishwasher of claim 4, characterized in that the air outlet (2) has a first outlet connected to the second pipe (11) and a second outlet opposite to the evaporator (8), the air outlet (2) being provided with an air outlet regulating valve (15), the air outlet regulating valve (15) having a first position for letting out air from the first outlet and a second position for letting out air from the second outlet.

6. The dishwasher of claim 5, characterized in that a humidity sensor (16) is arranged at the air outlet (2), the controller is in communication connection with the humidity sensor (16) and the air outlet adjusting valve (15), the controller can control the air outlet adjusting valve (15) to adjust to the second position when the humidity sensor (16) detects that the humidity at the air outlet (2) is greater than a preset humidity, and control the air outlet adjusting valve (15) to adjust to the first position when the humidity sensor (16) detects that the humidity at the air outlet (2) is less than or equal to the preset humidity.

7. The dishwasher of any one of claims 4 to 6, wherein the controller is communicatively connected to the circuit switching structure.

8. The dishwasher of claim 7, characterized in that the second line (11) is connected to the first line (9), and the line switching structure is a three-way valve (17) provided at a connection point of the second line (11) to the first line (9).

9. The dishwasher of any one of claims 1 to 6, characterized in that the spray arm assembly comprises an upper spray arm (4) and a lower spray arm (5) communicating with each other.

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