A dishwasher and a drying method thereof

Abstract

The application relates to a dishwasher with a drying device and a drying method thereof, comprising an inner container with a washing cavity formed inside, and further comprising a drying device which acts on the washing cavity after starting and performs a drying operation on the washing cavity, characterized in that: the inner container is provided with an air inlet and an air outlet which are communicated with the washing cavity, the drying device comprises an electric heating air assembly with an air inlet and an air outlet, the air inlet of the electric heating air assembly is communicated with the air inlet on the inner wall of the washing cavity, and the air outlet of the electric heating air assembly is communicated with the air outlet on the inner wall of the washing cavity; the inner container is provided with a breathing port which is communicated with the washing cavity, and the outer side wall of the inner container is provided with a hot air condensation exhaust pipe, the inlet of the hot air condensation exhaust pipe is communicated with the breathing port, and the outlet of the hot air condensation exhaust pipe is communicated with the outside.

Description

TECHNICAL FIELD

[0001] The present application relates to a dishwasher and a drying method thereof. BACKGROUND

[0002] The dishwasher is a kind of household appliance that can automatically clean tableware such as bowls, chopsticks, dishes and cookware, which greatly liberates people's hands. At present, the dishwasher on the market produces a lot of heat in the washing process, and these heat is often not reused. In addition, after the washing program of the dishwasher ends, the inside of the washing cavity is prone to re-humidification after a period of time, and the side wall of the inner tank of the dishwasher will condense condensate water, and the heating assembly inside the dishwasher is prone to rust and other problems due to long-term soaking in the condensate water, which leads to poor user experience of the dishwasher and causes dissatisfaction and complaints of customers. SUMMARY

[0003] The primary technical problem to be solved by the present application is to provide a dishwasher that can effectively utilize the waste heat generated in the washing process of the washing cavity.

[0004] The further technical problem to be solved by the present application is to provide a dishwasher drying method with good drying effect.

[0005] The application solves the primary technical problem by adopting the technical scheme of a dishwasher, which comprises an inner container with a washing cavity formed inside, a water inlet and a water outlet provided on the inner container and communicating with the washing cavity, a water inlet pipe communicating with an external water pipe, a water inlet electromagnetic valve provided in the water inlet pipe, a water outlet pipe communicating with an external water outlet pipe, and a water outlet electromagnetic valve provided in the water outlet pipe, characterized in that a breathing port communicating with the washing cavity is provided on the inner container, a hot gas condensation discharge pipe is provided on the outer side wall of the inner container, the inlet of the hot gas condensation discharge pipe communicates with the breathing port, the inlet of the hot gas condensation discharge pipe also communicates with the external water pipe through the water inlet pipe, and the outlet of the hot gas condensation discharge pipe communicates with the water inlet; a first electromagnetic valve is provided at or near the inlet of the hot gas condensation discharge pipe, a second electromagnetic valve is provided at or near the outlet of the hot gas condensation discharge pipe; a control circuit board is provided in the dishwasher, and the first electromagnetic valve, the second electromagnetic valve, the water inlet electromagnetic valve and the water outlet electromagnetic valve are electrically connected to the control circuit board; the control circuit board is provided with an automatic washing control program, which comprises at least two washing stages, at the beginning of the first washing stage, the control circuit board controls the water inlet electromagnetic valve to open, controls the first electromagnetic valve to open, controls the second electromagnetic valve to close, and keeps the first electromagnetic valve closed and the second electromagnetic valve closed after the hot gas condensation discharge pipe is filled with water; when the first washing stage ends, the control circuit board controls the water outlet electromagnetic valve to open for water drainage; at the beginning of the second washing stage, the control circuit board controls the water inlet electromagnetic valve to open, controls the first electromagnetic valve to close, and controls the second electromagnetic valve to open, so that the water in the hot gas condensation discharge pipe participates in the second washing stage through the water inlet.

[0006] During the washing process of the dishwasher, the washing water needs to be heated, and the above technical scheme is adopted, that is, the hot gas condensation discharge pipe is arranged on the outer side wall of the inner container, the outer side wall of the inner container is filled with water in the first washing stage, the water in the hot gas condensation discharge pipe can absorb the residual heat on the surface of the inner container during the washing process, and this part of water can be used for the second washing stage, thereby reducing the heating power of the dishwasher.

[0007] As an improvement, the control circuit board is provided with a drying program, after the washing program of the dishwasher ends, the drying program is executed, at the beginning stage of the drying program, the control circuit board controls the water inlet electromagnetic valve to open, controls the first electromagnetic valve to open, controls the second electromagnetic valve to close, makes the hot gas condensation exhaust pipe full of water, then controls the water inlet electromagnetic valve to close, controls the first electromagnetic valve to close, controls the second electromagnetic valve to close, the cold water in the hot gas condensation exhaust pipe absorbs the residual heat of the inner container in time; from the middle stage to the end of the drying program, the control circuit board controls the first electromagnetic valve to close, controls the second electromagnetic valve to open, controls the drain electromagnetic valve to open, makes the water in the hot gas condensation exhaust pipe discharge through the drain pipe and the drain electromagnetic valve, then the control circuit board controls the first electromagnetic valve to keep open, controls the second electromagnetic valve to open, controls the drain electromagnetic valve to open, makes the wet hot air in the washing cavity enter the hot gas condensation exhaust pipe through the breathing port, and the condensed water condensed in the hot gas condensation exhaust pipe returns to the washing cavity through the water inlet.

[0008] Through the above scheme, by cooperating the breathing port with the hot gas condensation exhaust pipe, at the initial stage of the drying program of the dishwasher, the hot gas condensation exhaust pipe is full of cold water, the cold water in the hot gas condensation exhaust pipe absorbs the residual heat of the inner container in time; from the middle stage to the end of the drying program, the water in the hot gas condensation exhaust pipe is emptied, the wet hot air in the washing cavity enters the hot gas condensation exhaust pipe through the breathing port, and the condensed water condensed in the hot gas condensation exhaust pipe returns to the washing cavity through the water inlet, which can effectively improve the drying effect.

[0009] The hot gas condensation exhaust pipe can be spirally arranged on the outer side wall and the outer top wall of the inner container. The spiral arrangement of the hot gas condensation exhaust pipe can quickly cool the hot gas entering the hot gas condensation exhaust pipe and accelerate the drying efficiency of the washing cavity.

[0010] Further improvement, the breathing port is provided with an air suction fan.

[0011] Further improvement, the inner container is provided with an air inlet and an air outlet which communicate with the washing cavity, the dishwasher further comprises a drying device which acts on the washing cavity after starting and performs drying operation on the washing cavity, the drying device comprises an electric heating air assembly having an air inlet and an air outlet, the air inlet of the electric heating air assembly communicates with the air inlet on the inner wall of the washing cavity, and the air outlet of the electric heating air assembly communicates with the air outlet on the inner wall of the washing cavity; the electric heating air assembly is electrically connected with the control circuit board.

[0012] The electric heating and air blowing assembly comprises an electric heating disc fixedly sealed on the inner container, a fan and a fan motor, the fan is located on the side of the electric heating disc close to the inner container, and a gap is formed between the fan and the electric heating disc, the fan motor is located on the other side of the electric heating disc away from the inner container, the output shaft of the fan motor is sealed through the electric heating disc and connected with the fan, and the electric heating disc is used for heating the air entering the gap between the fan and the electric heating disc; the electric heating disc and the fan are electrically connected with the control circuit board.

[0013] Further improvement, the electric heating and air blowing assembly is located on the lower side of the inner container, the lower side of the inner container is provided with a mounting opening, a fan cover is arranged at the mounting opening, the air inlet and the air outlet are arranged on the fan cover, and the electric heating and air blowing assembly is located below the mounting opening.

[0014] The technical means adopted by the present application to solve the above further technical problems is a drying method of the dishwasher with the above structure, characterized in that: the washing cavity is provided with a humidity detection sensor, and the humidity detection sensor is electrically connected with the control circuit board; after the washing program of the dishwasher is completed, a drying program is executed, during the execution of the drying program, the control circuit board detects the air humidity in the washing cavity in real time through the humidity detection sensor, when the air humidity in the washing cavity is within a preset humidity range, the control circuit board controls the electric heating and air blowing assembly to start, and the air humidity is in different humidity ranges, the air speed of the electric heating and air blowing assembly and the starting time are different.

[0015] The preset humidity range comprises a first range value, a second range value and a third range value arranged in turn from large to small; when the air humidity is within the preset first range value, the control circuit board controls the working time of the electric heating and air blowing assembly to be S1 seconds, and controls the air speed of the electric heating and air blowing assembly to be the maximum gear; when the air humidity is within the preset second range value, the control circuit board controls the working time of the electric heating and air blowing assembly to be S2 seconds, and controls the air speed of the electric heating and air blowing assembly to be the middle gear; when the air humidity is within the preset third range value, the control circuit board controls the working time of the electric heating and air blowing assembly to be S3 seconds, and controls the air speed of the electric heating and air blowing assembly to be the minimum gear; wherein S1>S2>S3.

[0016] The breathing port is provided with a suction fan, and the suction fan is also electrically connected with the control circuit board; when the air humidity in the washing cavity is less than the preset humidity range, the dishwasher ends the drying mode and enters a cleaning storage mode, in the cleaning storage mode, the control circuit board detects the air humidity in the washing cavity in real time through the humidity detection sensor, if the air humidity in the washing cavity enters the preset humidity range, the control circuit board controls the electric heating and air blowing assembly and the suction fan to start, the starting time of the electric heating and air blowing assembly and the suction fan is S3 seconds, and the air speed of the electric heating and air blowing assembly is the minimum gear.

[0017] Compared with the prior art, the advantages of the present invention are as follows: by setting a hot air condensation pipe on the outer wall of the inner tank, in the first washing stage, the hot air condensation pipe on the outer wall of the inner tank is filled with water. The water in the hot air condensation pipe can absorb the residual heat on the surface of the inner tank during the washing process. This part of the water can be used for the second washing stage, thereby effectively utilizing the residual heat generated in the washing chamber during the washing process and reducing the heating power of the dishwasher. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the dishwasher inner tub and related components connected to the inner tub in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the electric heating air assembly in an embodiment of the present invention.

[0020] Figure 3 This is a cross-sectional view of the electric heating air assembly in an embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 The dishwasher shown includes an inner tub 1 with a washing chamber 11 inside. The inner tub 1 can be open on the top or the front; in this embodiment, the inner tub is open on the front. A water inlet 12 is located near the bottom of the side wall of the inner tub 1, and a drain outlet 13 and a spray arm drive motor mounting port 14 are located at the bottom of the inner tub. The water inlet 12 is connected to an external tap water pipe via a water inlet pipe, which contains a water inlet solenoid valve (not shown in the figure). The drain outlet is connected to an external drain pipe via a drain pipe, which contains a drain solenoid valve (not shown in the figure). A vent is located on the left side wall of the inner tub 1, communicating with the washing chamber, and a suction fan 9 is located at the vent. A hot air condensation pipe 4 is located on the outer side wall of the inner tub, and the hot air condensation pipe 4 is coiled on the rear and top outer walls of the inner tub. The inlet of the hot air condenser pipe 4 is connected to the vent, and the inlet of the hot air condenser pipe 4 is also connected to the external tap water pipe through the water inlet pipe. The outlet of the hot air condenser pipe 4 is connected to the water inlet 12. A first solenoid valve 41 is provided at or near the inlet of the hot air condenser pipe 4, and a second solenoid valve 42 is provided at or near the outlet of the hot air condenser pipe 4. The dishwasher is equipped with a control circuit board (not shown in the figure). The first solenoid valve 41, the second solenoid valve 42, the water inlet solenoid valve, the drain solenoid valve, and the suction fan 9 are all electrically connected to the control circuit board.

[0023] The lower side of the inner tank is also provided with an electric heating plate 15 for heating the washing water. A filter screen 16 is provided above the electric heating plate 15. In this embodiment, the electric heating plate 15 consists of a heat-conducting plate and an electric heating tube fixed under the heat-conducting plate. See [reference needed] Figure 2 ,3 The filter screen 16 is provided with installation openings, and a fan cover 17 is arranged at the installation openings. The fan cover 17 is provided with air inlets 171 and air outlets 172, which are in communication with the washing cavity. The air inlets 171 are provided in multiple numbers and are arranged at the middle position of the fan cover and distributed at multiple concentric circles. The air outlets 172 are also provided in multiple numbers and are arranged at the periphery of the air inlets 171. The electric heating air assembly is arranged below the fan cover 17. The inner container is further connected with a drying device, which is used to dry the washing cavity after the washing cavity is started. In the embodiment, the drying device comprises an electric heating air assembly with air inlets and air outlets. The air inlets of the electric heating air assembly are in communication with the air inlets 171 on the inner wall of the washing cavity, and the air outlets of the electric heating air assembly are in communication with the air outlets 172 on the inner wall of the washing cavity. The electric heating air assembly comprises a fan motor 3, a fan 2 and the electric heating disc 15. The fan 2 is arranged above the electric heating disc and below the filter screen. The fan 2 and the electric heating disc 15 are provided with a gap. The fan motor 3 is arranged below the electric heating disc 15. The output shaft of the fan motor 3 is sealed and penetrates through the electric heating disc 15 and is connected with the fan. The electric heating disc 15 can heat the air entering the gap between the fan and the electric heating disc. See Figure 2 、 3 The fan motor 3 and the electric heating disc 15 are also electrically connected with the control circuit board.

[0024] The control circuit board is provided with an automatic washing control program, which comprises at least two washing stages. At the beginning of the first washing stage, the control circuit board controls the water inlet electromagnetic valve to be opened, controls the first electromagnetic valve 41 to be opened, controls the second electromagnetic valve 42 to be closed, and controls the first electromagnetic valve 41 to be closed after the hot gas condensing drain pipe 4 is filled with water. The water in the hot gas condensing drain pipe 4 can absorb the residual heat on the surface of the inner container during the washing process. When the first washing stage is finished, the control circuit board controls the drain electromagnetic valve to be opened to drain water. At the beginning of the second washing stage, the control circuit board controls the water inlet electromagnetic valve to be opened, controls the first electromagnetic valve 41 to be closed, and controls the second electromagnetic valve 42 to be opened. The water in the hot gas condensing drain pipe 4 participates in the second washing stage through the water inlet.

[0025] The control circuit board is provided with a drying program. After the washing program of the dishwasher ends, the drying program is executed. At the beginning stage of the drying program, the control circuit board controls the water inlet electromagnetic valve to open, controls the first electromagnetic valve 41 to open, and controls the second electromagnetic valve 42 to close. After the hot gas condensation exhaust pipe 4 is filled with water, the control circuit board controls the water inlet electromagnetic valve to close, controls the first electromagnetic valve 41 to close, and controls the second electromagnetic valve 42 to close. The cold water in the hot gas condensation exhaust pipe 4 absorbs the residual heat of the inner container in time. From the middle stage to the end of the drying program, the control circuit board controls the first electromagnetic valve 41 to close, controls the second electromagnetic valve 42 to open, and controls the drain electromagnetic valve to open. The water in the hot gas condensation exhaust pipe 4 is discharged through the drain pipeline and the drain electromagnetic valve. Then the control circuit board controls the first electromagnetic valve 41 to keep open, controls the second electromagnetic valve 42 to open, and controls the drain electromagnetic valve to open. The humid hot air in the washing cavity enters the hot gas condensation exhaust pipe 4 through the breathing port, and the condensed water in the hot gas condensation exhaust pipe 4 returns to the washing cavity through the water inlet. At the same time, a humidity detection sensor (not shown in the figure) is arranged at the position close to the top end in the washing cavity. The humidity detection sensor is electrically connected with the control circuit board. During the execution of the drying program of the dishwasher, the control circuit board detects the air humidity in the washing cavity in real time through the humidity detection sensor. When the air humidity in the washing cavity is in the preset humidity range, the control circuit board controls the electric heating plate 15 and the fan motor 3 to start. When the air humidity is in different humidity ranges, the wind speed of the fan motor 3, the starting time of the electric heating plate 15 and the fan motor 3 are different. The preset humidity range includes a first range value, a second range value and a third range value arranged from large to small. When the air humidity is in the preset first range value, the control circuit board controls the working time of the electric heating plate 15 and the fan motor 3 to be S1 seconds, and controls the wind speed of the fan motor 3 to be the maximum gear. When the air humidity is in the preset second range value, the control circuit board controls the working time of the electric heating plate 15 and the fan motor 3 to be S2 seconds, and controls the wind speed of the fan motor 3 to be the middle gear. When the air humidity is in the preset third range value, the control circuit board controls the working time of the electric heating plate 15 and the fan motor 3 to be S3 seconds, and controls the wind speed of the fan motor 3 to be the minimum gear. Wherein S1>S2>S3. From the middle stage to the end of the drying program, the electric heating plate 15 is turned on to heat. The fan 2 on the upper surface of the electric heating plate 15 sucks the air in the washing cavity from the air inlet 171 into the gap between the fan 2 and the electric heating plate. The electric heating plate heats the air. The fan 2 carries away the heat on the surface of the electric heating plate 15. The hot air is discharged into the washing cavity through the air outlet 172. After the hot air enters the washing cavity, part of the hot air rises to dry the inner wall of the inner container. Another part of the hot air is discharged from the breathing port and condensed through the hot gas condensation exhaust pipe 4, so as to accelerate the drying of the inner container and improve the drying effect.

[0026] When the air humidity in the washing cavity is less than the preset humidity range, the dishwasher ends the drying mode and enters the cleaning storage mode. In the cleaning storage mode, the control circuit board detects the air humidity in the washing cavity in real time through the humidity detection sensor. If the air humidity in the washing cavity enters the preset humidity range, the control circuit board controls the electric heating and air group and the air suction fan to be turned on, the opening time of the electric heating and air group and the air suction fan is S3 seconds, and the air speed of the electric heating and air group is the minimum gear.

Claims

1. A dishwasher comprising a tub having a washing cavity formed therein, the tub being provided with a water inlet and a water outlet communicating with the washing cavity, the water inlet communicating with an external water pipe through a water inlet pipe, the water inlet pipe being provided with a water inlet solenoid valve, the water outlet communicating with an external drain pipe through a water outlet pipe, the water outlet pipe being provided with a water outlet solenoid valve, characterized in that: The inner container is provided with a breathing port communicated with the washing cavity, and the outer side wall of the inner container is provided with a hot gas condensation exhaust pipe, the inlet of the hot gas condensation exhaust pipe is communicated with the breathing port, and the inlet of the hot gas condensation exhaust pipe is also communicated with an external tap water pipe through the water inlet pipe, and the outlet of the hot gas condensation exhaust pipe is communicated with the water inlet; a first electromagnetic valve is arranged at or near the inlet of the hot gas condensation exhaust pipe, and a second electromagnetic valve is arranged at or near the outlet of the hot gas condensation exhaust pipe; the dishwasher is provided with a control circuit board, the first electromagnetic valve, the second electromagnetic valve, the water inlet electromagnetic valve and the drainage electromagnetic valve are electrically connected with the control circuit board, the control circuit board is provided with an automatic washing control program, the automatic washing control program at least includes two washing stages, at the beginning of the first washing stage, the control circuit board controls the water inlet electromagnetic valve to open, controls the first electromagnetic valve to open, controls the second electromagnetic valve to close, makes the hot gas condensation exhaust pipe full of water, then controls the first electromagnetic valve to close, controls the second electromagnetic valve to close; when the first washing stage is finished, the control circuit board controls the drainage electromagnetic valve to open to drain water; at the beginning of the second washing stage, the control circuit board controls the water inlet electromagnetic valve to open, controls the first electromagnetic valve to close, controls the second electromagnetic valve to open, and the water in the hot gas condensation exhaust pipe participates in the second washing stage through the water inlet.

2. The dishwasher according to claim 1, characterized in that: The control circuit board is provided with a drying program, after the washing program of the dishwasher is finished, the drying program is executed, at the beginning stage of the drying program, the control circuit board controls the water inlet electromagnetic valve to open, controls the first electromagnetic valve to open, controls the second electromagnetic valve to close, makes the hot gas condensation exhaust pipe full of water, then controls the water inlet electromagnetic valve to close, controls the first electromagnetic valve to close, controls the second electromagnetic valve to close, and the cold water in the hot gas condensation exhaust pipe absorbs the residual heat of the inner container in time; from the middle stage of the drying program to the end of the drying, the control circuit board controls the first electromagnetic valve to close, controls the second electromagnetic valve to open, controls the drainage electromagnetic valve to open, makes the water in the hot gas condensation exhaust pipe drain through the drainage pipe and the drainage electromagnetic valve, then the control circuit board controls the first electromagnetic valve to keep in the open state, controls the second electromagnetic valve to open, controls the drainage electromagnetic valve to open, makes the wet hot air in the washing cavity enter the hot gas condensation exhaust pipe through the breathing port, and the condensed water in the hot gas condensation exhaust pipe returns to the washing cavity through the water inlet.

3. The warewash machine of claim 2, further comprising: The hot gas condensation exhaust pipe is spirally arranged on the outer side wall and the outer top wall of the inner container.

4. The warewash machine of claim 3, further characterized by: The breathing port is provided with an air suction fan.

5. The dishwasher according to claim 2 or 3 or 4, characterized in that: The inner container is provided with an air inlet and an air outlet communicated with the washing cavity, and the dishwasher further comprises a drying device for acting on the washing cavity and drying the washing cavity after being started, the drying device comprises an electric heating air component with an air inlet and an air outlet, the air inlet of the electric heating air component is communicated with the air inlet on the inner wall of the washing cavity, and the air outlet of the electric heating air component is communicated with the air outlet on the inner wall of the washing cavity; the electric heating air component is electrically connected with the control circuit board.

6. The warewash machine of claim 5, further characterized by: The electric heating and air blowing assembly comprises an electric heating disc fixedly sealed on the inner container, a fan and a fan motor, the fan is located on the side of the electric heating disc close to the inner container, and a gap is formed between the fan and the electric heating disc, the fan motor is located on the side of the electric heating disc away from the inner container, the output shaft of the fan motor is sealed through the electric heating disc and connected with the fan, and the electric heating disc is used for heating the air entering the gap between the fan and the electric heating disc; the electric heating disc and the fan are electrically connected with the control circuit board.

7. The warewash machine of claim 6, further comprising: The electric heating and air blowing assembly is located on the lower side of the inner container, the lower side of the inner container is provided with a mounting opening, a fan cover is arranged at the mounting opening, the air inlet and the air outlet are arranged on the fan cover, and the electric heating and air blowing assembly is located below the mounting opening.

8. A drying method of a dishwasher applied to the dishwasher of claim 5, characterized in that: The humidity detection sensor is arranged in the washing cavity and is electrically connected with the control circuit board; after the washing program of the dishwasher ends, the drying program is executed, the control circuit board detects the air humidity in the washing cavity in real time through the humidity detection sensor during the execution of the drying program, when the air humidity in the washing cavity is in the preset humidity range, the control circuit board controls the electric heating and air blowing assembly to start, and the air humidity is in different humidity ranges, the air speed of the electric heating and air blowing assembly and the starting time are different.

9. The drying method of claim 8, wherein: The preset humidity range comprises a first range value, a second range value and a third range value arranged in turn from large to small; when the air humidity is in the preset first range value, the control circuit board controls the working time of the electric heating and air blowing assembly to be S1 seconds, and controls the air speed of the electric heating and air blowing assembly to be the maximum gear; when the air humidity is in the preset second range value, the control circuit board controls the working time of the electric heating and air blowing assembly to be S2 seconds, and controls the air speed of the electric heating and air blowing assembly to be the middle gear; when the air humidity is in the preset third range value, the control circuit board controls the working time of the electric heating and air blowing assembly to be S3 seconds, and controls the air speed of the electric heating and air blowing assembly to be the minimum gear; wherein S1>S2>S3.

10. The drying method of claim 9, wherein: The breathing port is provided with a suction fan, and the suction fan is also electrically connected with the control circuit board; when the air humidity in the washing cavity is less than the preset humidity range, the dishwasher ends the drying mode and enters the cleaning storage mode, in the cleaning storage mode, the control circuit board detects the air humidity in the washing cavity in real time through the humidity detection sensor, if the air humidity in the washing cavity enters the preset humidity range, the control circuit board controls the electric heating and air blowing assembly and the suction fan to start, the starting time of the electric heating and air blowing assembly and the suction fan is S3 seconds, and the air speed of the electric heating and air blowing assembly is the minimum gear.

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