A cleaning machine and a cleaning method

Abstract

The present application relates to a kind of cleaning machine and cleaning method, including box and spray arm, gas supply mechanism, the top wall of spray arm is opened with first spray hole, the bottom wall of spray arm is opened with water inlet and second spray hole, the bottom of the box is provided with the gas supply mechanism that can supply gas to vortex line flow channel, the gas outlet of this gas supply mechanism is located in water inlet and spiral twist along the rotation direction of spray arm.The present application is opened with first spray hole in the top wall of spray arm, and second spray hole is opened in bottom wall, in cleaning state, can balance water flow viscous force by the intermittent gas supply of gas supply mechanism and improve the rotation stability and rotation power of spray arm, to improve cleaning effect;In dry state, the air input into spray arm by gas supply mechanism can be respectively emitted by first spray hole, second spray hole, reduce the blowing position, increase the blowing surface, it is favorable to improve dry efficiency and dry effect.

Description

Technical Field

[0001] This invention relates to the field of dishwasher technology, specifically to a washing machine and washing method for cleaning tableware, fruits and vegetables. Background Technology

[0002] Currently, the spray arm of a sink-type dishwasher is generally fixed to the bottom of the sink by a snap-fit ​​connection with a guide seat. For example, Chinese invention patent application CN202011063575.X, entitled "A Cleaning Machine and Cleaning Method" (publication number: CN112244711A), discloses a structure that includes a housing, a spray arm, a water-absorbing impeller, and a motor. The spray arm is located in the housing and has a water inlet on the bottom wall and a spray hole on the top wall. The water-absorbing impeller is rotatably located in the housing and is used to pump water from the bottom of the housing to the spray arm. The motor is located at the bottom of the housing and is used to drive the water-absorbing impeller to rotate. A guide seat is provided on the bottom wall of the housing, and the spray arm is rotatably supported on the upper end of the guide seat. A guide sleeve extending downward from the edge of the water inlet of the spray arm is provided in the guide seat. The lower part of the water-absorbing impeller is located in the guide sleeve, and the upper part passes through the water inlet and is located in the spray arm.

[0003] Because the washing machine needs to meet the requirement of high water level without overflow during fruit and vegetable washing, the drying air inlet is generally set at the top, which cannot effectively dry the bottom where the water mainly accumulates, resulting in poor overall drying effect of the tank. In addition, the air outlet is mainly installed at the middle height of the tank, and is passively discharged by the pressure difference between the inside and outside, resulting in poor air flow, which is also not conducive to drying the tank. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a cleaning machine that improves the drying effect by lowering the blowing position and increasing the blowing surface, in light of the current state of the prior art.

[0005] The second technical problem to be solved by the present invention is to provide a cleaning method that can improve the cleaning effect and stability and improve the drying effect by utilizing a blowing structure, in view of the current state of the prior art.

[0006] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is as follows:

[0007] A cleaning machine includes a housing, a flow guide seat, a spray arm, and a water pumping mechanism. The flow guide seat is supported at the bottom of the housing, and the spray arm is constrained at the top of the flow guide seat. The water pumping mechanism pumps water from the bottom of the housing to the spray arm. The spray arm forms a hollow vortex flow channel. The top wall of the spray arm has a first spray hole, and the bottom wall of the spray arm has a water inlet and a second spray hole. The bottom of the housing is provided with an air supply mechanism that supplies air to the vortex flow channel. The air outlet of the air supply mechanism is located inside the water inlet and is spirally twisted along the rotation direction of the spray arm.

[0008] Preferably, the spray arm is provided with a transversely arranged baffle, which divides the vortex flow channel into an upper flow channel and a lower flow channel that are relatively independent. The first nozzle is connected to the upper flow channel, and the second nozzle is connected to the lower flow channel. This structure allows fluid to be supplied to the first and second nozzles through relatively independent flow channels, thereby eliminating interference between the first and second nozzles and reducing fluid energy loss.

[0009] Preferably, the vortex channel is a bidirectional vortex channel, and the spray arm forms a concentrated cavity corresponding to the water inlet at the central part of the bidirectional vortex channel. The inlet of the upper channel is connected to the upper part of the concentrated cavity, and the inlet of the lower channel is connected to the lower part of the concentrated cavity. Using a bidirectional vortex channel facilitates the use of water flow viscosity to drive the spray arm to rotate.

[0010] Preferably, the upper port of the flow guide seat is connected to the water inlet of the bottom wall of the spray arm, and an air supply channel extending from bottom to top is formed on the side wall of the flow guide seat. The lower port of the air supply channel is located at the bottom of the housing and forms an air inlet, and the air outlet of the air supply channel is located at the top edge of the flow guide seat and is arranged corresponding to the inner edge of the concentration cavity. By setting the air supply channel through the flow guide seat, other washing space is not occupied, thereby reducing the impact on fluid flow.

[0011] Preferably, the air outlet of the air supply mechanism forms an L-shaped nozzle, of which there are at least two and are circumferentially spaced in the concentrating cavity. The tops of each L-shaped nozzle are arranged laterally and maintain the same twisting tendency in the circumferential direction of the concentrating cavity. This structure is used to provide auxiliary power for the rotation of the spray arm by utilizing the air outlet from the nozzle.

[0012] Preferably, the pumping mechanism includes an impeller and a motor. The upper part of the impeller is a centrifugal impeller located in the central chamber, and the lower part is an axial flow impeller located in the guide seat. The motor is located at the bottom of the housing and its output shaft passes through the housing and is connected to the impeller.

[0013] Preferably, the centrifugal impeller is located in the upper part of the concentrating chamber and is arranged corresponding to the inlet of the upper flow channel, while the nozzle is located in the lower part of the concentrating chamber and is arranged corresponding to the inlet of the lower flow channel. Since this invention primarily rinses tableware by spraying water upwards through the first nozzle, the above structure, with the centrifugal impeller corresponding to the inlet of the upper flow channel, allows most of the water flow to be drawn into the upper flow channel, increasing the spray volume and head of the first nozzle to maintain a good cleaning effect on the tableware. Meanwhile, the second nozzle sprays a small amount of water from the lower flow channel downwards to rinse the filter plate below the spray arm, keeping the filter plate clean and improving the slag collection effect.

[0014] Preferably, the air inlet of the air supply mechanism is located on the bottom wall of the housing. The air supply mechanism also includes an air supply pipe located outside the housing, and the air supply pipe is equipped with a one-way valve that only allows air to be supplied to the housing. This one-way valve is provided to facilitate air supply and prevent washing water leakage.

[0015] Preferably, the gas supply pipe includes a first portion that is horizontal and a second portion that is connected below the first portion and extends vertically. The end of the first portion forms a gas inlet, and the lower part of the second portion forms a water discharge outlet. The one-way valve is located between the gas inlet of the first portion and the second portion. More preferably, a valve plug that can move up and down to cut off or connect the first portion is provided at the junction of the second portion and the first portion. A driving member that can drive the valve plug to move up and down is provided below the second portion, and a drain outlet that can open or close as the valve plug moves up and down is provided in the middle of the second portion. This structure facilitates the timely removal of water from the gas supply pipe.

[0016] Preferably, the lower part of the concentration chamber is provided with a baffle extending from the outside to the inside along the rotation direction of the spray arm at the corresponding lower flow channel, and the outlet of the nozzle is arranged corresponding to the baffle. The baffle serves two purposes: firstly, in the washing state, it can block water entering the lower flow channel, reducing the flow rate in the lower channel and increasing the flow rate in the upper channel; secondly, in the drying state, the air outlet from the nozzle directly impacts the baffle, increasing the driving force contributed by the air outlet to the rotation of the spray arm.

[0017] One cleaning method is as follows:

[0018] (1) When the tableware is being washed, the water level is below the spray arm. The air supply mechanism is isolated from the tank through a one-way valve. The water pumping mechanism continuously pumps the water at the bottom of the tank through the inlet to the vortex flow channel of the spray arm, and further sprays the water column upward through the first spray hole to rinse the tableware.

[0019] During the above-mentioned cleaning process of tableware, the spray arm rotates under the action of water flow viscosity. A small flow of air is intermittently supplied to the spray arm through the air supply mechanism. This air balances the water flow viscosity in the circumferential direction of the spray arm rotation, keeping the spray arm rotating smoothly. On the other hand, it causes air bubbles to be carried in the sprayed water column. When the water column carrying air bubbles hits the surface of the tableware, the air bubbles burst, thereby removing the contaminants from the surface of the tableware.

[0020] (2) During the fruit and vegetable washing state, the water level is above the spray arm. The air supply mechanism is relatively isolated from the box through the one-way valve. The water pumping mechanism continuously pumps the water at the bottom of the box through the water inlet to the vortex flow channel of the spray arm, and further sprays the water column upward through the first spray hole to form a turbulent water flow to wash the fruits and vegetables.

[0021] During the above-mentioned cleaning process of fruits and vegetables, the spray arm rotates under the influence of water flow viscosity. Air is continuously supplied to the spray arm through the air supply mechanism. On the one hand, the air balances the water flow viscosity in the circumferential direction of the spray arm rotation and provides auxiliary rotational force, keeping the spray arm rotating smoothly and increasing the spray arm speed. On the other hand, it causes air bubbles to be carried in the sprayed water column. The water column with air bubbles mixes into the water, increasing the water flow turbulence in areas below the water level, thereby removing pollutants from the surface of fruits and vegetables.

[0022] (3) When the cleaning is completed, the water pump mechanism does not run, and the air supply mechanism continuously supplies air to the spray arm. The air is discharged through the spiral twisted air outlet. The air is driven to rotate by the air flow viscosity force. The air is sprayed upward through the first spray hole and downward through the second spray hole, thereby quickly drying the inside of the box.

[0023] Compared with the prior art, the advantages of the present invention are as follows: The present invention has a first spray hole on the top wall and a second spray hole on the bottom wall of the spray arm. In the cleaning state, the intermittent air supply of the air supply mechanism can balance the water flow viscosity and improve the rotational stability and rotational power of the spray arm, thereby improving the cleaning effect. In the drying state, the air input into the spray arm by the air supply mechanism can be discharged through the first spray hole and the second spray hole respectively, which lowers the blowing position and increases the blowing surface, which is conducive to improving the drying efficiency and drying effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0025] Figure 2 for Figure 1 External structural diagram;

[0026] Figure 3 This is a cross-sectional view of an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the spray arm in an embodiment of the present invention;

[0028] Figure 5 for Figure 4 A schematic diagram of the bottom structure;

[0029] Figure 6 This is a cross-sectional view of the spray arm in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the flow guide seat in an embodiment of the present invention. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] like Figures 1-7As shown, the cleaning machine in this embodiment includes a housing 1, a flow guide seat 2, a spray arm 3, a water pumping mechanism 4, and an air supply mechanism 5. The bottom of the housing 1 has a recessed return water area 11, the top of which is covered by a filter plate. A slag collection basket with a slag collection port protruding from the filter plate is provided in the return water area 11. The bottom of the flow guide seat 2 is fixed to the return water area 11 by screws. The spray arm 3 is rotatably constrained to the top of the flow guide seat 2 by a retaining ring, and the spray arm 3 is located above the filter plate. The water pumping mechanism 4 pumps water from the return water area 11 to the spray arm 3.

[0033] In this embodiment, the spray arm 3 has a hollow vortex flow channel 30. The top wall of the spray arm 3 has a first spray hole 31, and the bottom wall of the spray arm 3 has a water inlet 32 ​​and a second spray hole 33. The bottom of the housing 1 is provided with an air supply mechanism 5 that can supply air to the vortex flow channel 30. The air outlet of the air supply mechanism 5 is located inside the water inlet 32 ​​and is spirally twisted along the rotation direction of the spray arm 3.

[0034] The spray arm 3 is equipped with a transversely arranged baffle 34, which divides the vortex flow channel 30 into an upper flow channel 301 and a lower flow channel 302, which are relatively independent. The first nozzle 31 is connected to the upper flow channel 301, and the second nozzle 33 is connected to the lower flow channel 302. With the above structure, fluid is supplied to the first nozzle 31 and the second nozzle 33 through relatively independent flow channels, thereby eliminating interference between the first nozzle 31 and the second nozzle 33 and reducing fluid energy loss.

[0035] The aforementioned vortex channel 30 is a bidirectional vortex channel. The spray arm 3 forms a concentrated cavity 35 corresponding to the inlet 32 ​​at its central portion. The inlet of the upper channel 301 is connected to the upper part of the concentrated cavity 35, and the inlet of the lower channel 302 is connected to the lower part of the concentrated cavity 35. The use of a bidirectional vortex channel facilitates the rotation of the spray arm by utilizing the viscosity of the water flow.

[0036] The upper port of the flow guide seat 2 is connected to the water inlet 32 ​​on the bottom wall of the spray arm 3. An air supply channel 21 extending from bottom to top is formed on the side wall of the flow guide seat 2. The lower port of the air supply channel 21 is located at the bottom of the housing 1 and forms an air inlet 211. The air outlet of the air supply channel 21 is located at the top edge of the flow guide seat 2 and is arranged corresponding to the inner edge of the concentration cavity 35. By setting the air supply channel 21 through the flow guide seat 2, other washing space is not occupied, thereby reducing the impact on fluid flow.

[0037] The air outlet of the air supply mechanism 5 forms three L-shaped nozzles 51, which are circumferentially spaced in the concentrating cavity 35. The tops of each L-shaped nozzle 51 are arranged laterally and maintain the same twisting tendency in the circumferential direction of the concentrating cavity 35. This structure is adopted to provide auxiliary power for the rotation of the spray arm 3 by using the air outlet of the nozzles 51.

[0038] The pumping mechanism 4 in this embodiment includes an impeller 41 and a motor 42. The upper part of the impeller 41 is a centrifugal impeller 411 located in the central cavity 35, and the lower part is an axial flow impeller 412 located in the guide seat 2. The motor 42 is located at the bottom of the housing 1 and its output shaft 421 passes through the housing 1 and is connected to the impeller 41.

[0039] The centrifugal impeller 411 is located at the upper part of the concentrating chamber 35 and is arranged corresponding to the inlet of the upper flow channel 301. The nozzle 51 is located at the lower part of the concentrating chamber 35 and is arranged corresponding to the inlet of the lower flow channel 302. Since this embodiment mainly achieves the rinsing of tableware by spraying water jets upward through the first spray hole 31, with the above structure, the centrifugal impeller 411, corresponding to the inlet of the upper flow channel 301, can draw most of the water flow into the upper flow channel 301, thereby increasing the spray volume and head of the first spray hole 31 to maintain a good cleaning effect on the tableware; while the second spray hole 33 sprays a small amount of water from the lower flow channel 302 downward to rinse the filter plate below the spray arm 3, thereby keeping the filter plate clean and improving the slag collection effect.

[0040] A baffle 351 extending from the outside in along the rotation direction of the spray arm 3 is provided at the lower part of the central cavity 35 at the corresponding lower flow channel 302. The outlet of the nozzle 51 is arranged corresponding to the baffle 351. The baffle 351 is provided to block the water entering the lower flow channel 302 in the water washing state, thereby reducing the flow rate of the lower flow channel 302 and increasing the flow rate of the upper flow channel 301. On the other hand, in the drying state, the air outlet of the nozzle 51 directly impacts the baffle 351, thereby increasing the driving force contributed by the air outlet to the rotation of the spray arm 3.

[0041] In this embodiment, the air inlet 211 of the air supply mechanism 5 is opened on the bottom wall of the housing 1. The air supply mechanism 5 also includes an air supply pipe 52 located outside the housing 1. The air supply pipe 52 is provided with a one-way valve 6 that only allows air to be supplied to the housing 1. The one-way valve 6 is provided to facilitate air supply and prevent washing water leakage.

[0042] The gas supply pipe 52 of this embodiment includes a first part 521 that is horizontal and a second part 522 that is connected to the first part 521 and extends vertically. The end of the first part 521 forms a gas inlet end 520, which is inclined upwards. The lower part of the second part 522 forms a water discharge outlet. A one-way valve 6 is located between the gas inlet end of the first part 521 and the second part 522. A valve plug 53 that can move up and down to cut off or connect the first part 521 is provided at the junction of the second part 522 and the first part 521. A driving member 531 that can drive the valve plug 53 to move up and down is provided below the second part 522. A drain outlet 523 that can open or close as the valve plug 53 moves up and down is provided in the middle of the second part 522. This structure facilitates the timely removal of water from the gas supply pipe 52.

[0043] The cleaning method in this embodiment is as follows:

[0044] (1) When the tableware is being cleaned, the water level is below the spray arm 3. The air supply mechanism 5 is relatively isolated from the inside of the box 1 through the one-way valve 6. The drive component 531 drives the valve plug 53 to the first part 521 to be laterally connected and the drain outlet 523 is closed. The pumping mechanism 4 continuously pumps the water in the return water area 11 at the bottom of the box 1 to the vortex flow channel 30 of the spray arm 3 through the water inlet 32, and further sprays a large flow water column upward through the first spray hole 31 and a small flow water column downward through the second spray hole 33 to rinse the tableware, flush the filter plate and collect the residue.

[0045] During the above-mentioned cleaning process of tableware, the spray arm 3 rotates under the action of the water flow viscosity. The air supply mechanism 5 intermittently supplies a small flow of air to the spray arm 3. This air balances the water flow viscosity in the circumferential direction of the spray arm 3 rotation, keeping the spray arm 3 rotating smoothly. On the other hand, it causes air bubbles to be carried in the sprayed water column. When the water column carrying air bubbles hits the surface of the tableware, the air bubbles burst, thereby removing the contaminants from the surface of the tableware.

[0046] (2) During the fruit and vegetable washing state, the water level is above the spray arm 3. The air supply mechanism 5 is relatively isolated from the inside of the box 1 through the one-way valve 6. The drive component 531 drives the valve plug 53 to the first part 521 to be horizontally connected and the drain outlet 523 is closed. The pumping mechanism 4 continuously pumps the water in the return water area 11 at the bottom of the box 1 to the vortex flow channel 30 of the spray arm 3 through the water inlet 32, and further sprays water column upward through the first spray hole 31 and sprays water column downward through the second spray hole 33 to form a turbulent water flow to wash the fruits and vegetables.

[0047] During the above-mentioned cleaning process of fruits and vegetables, the spray arm 3 rotates under the influence of the water flow viscosity. Air is continuously supplied to the spray arm 3 through the air supply mechanism 5. On the one hand, the air balances the water flow viscosity in the circumferential direction of the spray arm 3 and provides auxiliary rotational force, keeping the spray arm 3 rotating smoothly and increasing the speed of the spray arm 3. On the other hand, it causes air bubbles to be carried in the sprayed water column. The water column carrying air bubbles mixes into the water, increasing the water flow turbulence in the areas below the water level, thereby removing pollutants from the surface of fruits and vegetables.

[0048] (3) After cleaning, the drive unit 531 drives the valve plug 53 to the first part 521 to be laterally connected and the drain port 523 is opened to drain the water in the air supply pipe 52. After that, the drive unit 531 drives the valve plug 53 to the first part 521 to be laterally connected and the drain port 523 is closed. The pump mechanism 4 does not operate. The air supply mechanism 5 continuously supplies air to the spray arm 3. The air is discharged through the spiral twisted air outlet. The air flow viscosity force drives the spray arm 3 to rotate. The air is sprayed upward through the first spray hole 31 and downward through the second spray hole 32, thereby quickly drying the inside of the box 1.

[0049] After drying, the drive unit 531 drives the valve plug 53 to the first part 521 to the lateral partition.

[0050] In this embodiment, during the cleaning state, the intermittent air supply of the air supply mechanism 5 can balance the water flow viscosity and improve the rotational stability and rotational power of the spray arm 3, thereby improving the cleaning effect. During the drying state, the air input into the spray arm 3 by the air supply mechanism 5 can be discharged through the first spray hole 31 and the second spray hole 32 respectively, which lowers the blowing position and increases the blowing surface, which is beneficial to improving the drying efficiency and drying effect.

[0051] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A cleaning machine, comprising a housing (1), a flow guide seat (2), a spray arm (3), and a water pumping mechanism (4), wherein the flow guide seat (2) is supported at the bottom of the housing (1), the spray arm (3) is constrained at the top of the flow guide seat (2), and the water pumping mechanism (4) is used to pump water from the bottom of the housing (1) into the spray arm (3), characterized in that: The spray arm (3) forms a hollow vortex flow channel (30). The top wall of the spray arm (3) has a first spray hole (31). The bottom wall of the spray arm (3) has a water inlet (32) and a second spray hole (33). The bottom of the box (1) is provided with an air supply mechanism (5) that can supply air to the vortex flow channel (30). The air outlet of the air supply mechanism (5) is located inside the water inlet (32) and is spirally twisted along the rotation direction of the spray arm (3). The spray arm (3) is provided with a horizontally arranged baffle (34), which divides the vortex flow channel (30) into an upper flow channel (301) and a lower flow channel (302) that are relatively independent. The first nozzle (31) is connected to the upper flow channel (301), and the second nozzle (33) is connected to the lower flow channel (302). The vortex flow channel (30) is a bidirectional vortex flow channel. The spray arm (3) forms a concentrated cavity (35) corresponding to the inlet (32) at the central part of the bidirectional vortex flow channel. The inlet of the upper flow channel (301) is connected to the upper part of the concentrated cavity (35), and the inlet of the lower flow channel (302) is connected to the lower part of the concentrated cavity (35).

2. The cleaning machine according to claim 1, characterized in that: The upper port of the guide seat (2) is connected to the water inlet (32) of the bottom wall of the spray arm (3). A supply air channel (21) extending from bottom to top is formed on the side wall of the guide seat (2). The lower port of the supply air channel (21) is located at the bottom of the box (1) and forms an air inlet. The air outlet of the supply air channel (21) is located at the top edge of the guide seat (2) and is arranged corresponding to the inner edge of the concentration cavity (35).

3. The cleaning machine according to claim 2, characterized in that: The air supply mechanism (5) forms an L-shaped nozzle (51) at the air outlet. There are at least two nozzles (51) and they are distributed circumferentially in the concentrating cavity (35). The top of each L-shaped nozzle (51) is arranged laterally and maintains the same twisting tendency in the circumferential direction of the concentrating cavity (35).

4. The cleaning machine according to claim 3, characterized in that: The pumping mechanism (4) includes an impeller (41) and a motor (42). The upper part of the impeller (41) is a centrifugal impeller (411) located in the central cavity (35), and the lower part is an axial flow impeller (412) located in the guide seat (2). The motor (42) is located at the bottom of the housing (1) and its output shaft passes through the housing (1) and is connected to the impeller (41).

5. The cleaning machine according to claim 4, characterized in that: The centrifugal impeller (411) is located in the upper part of the concentrating cavity (35) and is arranged corresponding to the inlet of the upper flow channel (301), while the nozzle (51) is located in the lower part of the concentrating cavity (35) and is arranged corresponding to the inlet of the lower flow channel (302).

6. The cleaning machine according to any one of claims 1 to 5, characterized in that: The air inlet of the air supply mechanism (5) is located on the bottom wall of the box (1). The air supply mechanism (5) also includes an air supply pipe (52) located outside the box (1). The air supply pipe (52) is equipped with a one-way valve (6) that only allows air to be supplied to the box (1).

7. The cleaning machine according to claim 6, characterized in that: The gas supply pipe (52) includes a first part (521) that is horizontal and a second part (522) that is connected below the first part (521) and extends vertically. The end of the first part (521) forms a gas input end, and the lower part of the second part (522) forms a water discharge outlet. The one-way valve (6) is located between the gas input end of the first part (521) and the second part (522).

8. The cleaning machine according to claim 7, characterized in that: The second part (522) is provided with a valve plug (53) that can move up and down to cut off or connect the first part (521) at the junction of the second part (522) and the first part (521). A drive member (531) that can drive the valve plug (53) to move up and down is provided below the second part (522). A drain port (523) that can be opened or closed as the valve plug (53) moves up and down is provided in the middle of the second part (522).

9. The cleaning machine according to any one of claims 3 to 5, characterized in that: The lower part of the central cavity (35) is provided with a baffle (351) extending from the outside to the inside along the rotation direction of the spray arm (3) at the corresponding lower flow channel (302), and the outlet of the nozzle (51) is arranged in relation to the baffle (351).

10. A cleaning method, characterized in that: The cleaning machine according to any one of claims 1 to 9 is used. (1) When the tableware is being cleaned, the water level is below the spray arm (3). The air supply mechanism (5) is relatively isolated from the inside of the box (1) through the one-way valve (6). The water pumping mechanism (4) continuously pumps the water at the bottom of the box (1) through the water inlet (32) to the vortex flow channel (30) of the spray arm (3), and further sprays the water column upward through the first spray hole (31) to rinse the tableware. During the cleaning process of tableware, the spray arm (3) rotates under the action of water flow viscosity. A small flow of air is intermittently supplied to the spray arm (3) through the air supply mechanism (5). On the one hand, the air balances the water flow viscosity in the circumferential direction of the spray arm (3) and keeps the spray arm (3) rotating smoothly. On the other hand, it causes air bubbles to be carried in the sprayed water column. When the water column carrying air bubbles hits the surface of the tableware, the air bubbles burst, thereby removing the contaminants from the surface of the tableware. (2) During the fruit and vegetable washing process, the water level is above the spray arm (3). The air supply mechanism (5) is relatively isolated from the box (1) through the one-way valve (6). The water pumping mechanism (4) continuously pumps the water at the bottom of the box (1) through the water inlet (32) to the vortex flow channel (30) of the spray arm (3), and further sprays the water column upward through the first spray hole (31) to form a turbulent water flow to wash the fruit and vegetables. During the washing process of fruits and vegetables, the spray arm (3) rotates under the influence of water flow viscosity. Air is continuously supplied to the spray arm (3) through the air supply mechanism (5). On the one hand, the air balances the water flow viscosity in the circumferential direction of the spray arm (3) and provides auxiliary rotational force, keeping the spray arm (3) rotating smoothly and increasing the speed of the spray arm (3). On the other hand, it causes air bubbles to be carried in the sprayed water column. The water column carrying air bubbles mixes into the water, increasing the turbulence of the water flow in the area below the water level, thereby peeling off the pollutants on the surface of the fruits and vegetables. (3) When the cleaning is completed, the water pump mechanism (4) does not operate, and the air supply mechanism (5) continuously supplies air to the spray arm (3). The air is discharged through the spiral twisted air outlet, and the spray arm (3) is rotated by the air flow viscosity force. The air is sprayed upward through the first spray hole (31) and downward through the second spray hole (33), thereby quickly drying the inside of the box (1).

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