A cleaning machine and a cleaning method

Abstract

The present application relates to a kind of cleaning machine and cleaning method, cleaning machine includes tank and slag collecting basket, the bottom of tank is recessed with the flow guide area being connected with backwater area, the top of this flow guide area is provided with the baffle that can cover it, the bottom of tank is provided with the water pumping mechanism that can pump water from backwater area through flow guide area to above baffle.The present application arranges pump water mechanism separately from backwater area and filter plate, i.e., backwater area and filter plate are independently arranged on the side of pump water mechanism, pump water mechanism does not need to pass through filter plate installation, which provides convenience for assembly; Baffle does not participate in filtration, eliminating the poor filtering effect at driving mechanism and the disadvantage of accumulated residue, water flow is more and faster through filter plate filtration, slag collecting basket slag collection, which is beneficial to improve filtering and slag collection effect; Since pump water mechanism is not installed in backwater area, the limitation of installation space is eliminated, which is convenient for reducing the water suction surface of pump water mechanism to avoid air bubbles entering backwater, which is beneficial to improve the performance of water pump.

Description

Technical Field

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

[0002] As people's living standards continue to improve, dishwashers, as a type of kitchen appliance, are increasingly entering households. Currently, dishwashers on the market are generally divided into three types: countertop, cabinet, and sink. Countertop dishwashers are freestanding units that are typically placed on the countertop; cabinet dishwashers are also freestanding units, but they need to be integrated into kitchen cabinets; and sink dishwashers are integrated with the sink and are typically installed in kitchen cabinets.

[0003] Currently, the structure of water tank cleaning machines on the market is mainly the structure mentioned in the applicant's earlier application CN201310750968.1 "Water Tank Cleaning Machine". This structure includes a housing forming the washing space, comprising a water tank body and a cover plate rotatably connected to the water tank body. The bottom of the water tank body has a recessed drainage area at least in the center. A water pump is installed in the drainage area to pump water from the drainage area to the washing space above the drainage area. The drainage area is covered by a drain plate with drainage holes, and a rotating spray arm with water outlet holes, fluidly connected to the water pump, is located above the drain plate. Furthermore, to further improve the cleaning effect, the applicant's earlier applications CN201810334714.4 and CN201810334713.X "Carrier Structure of Water Tank Cleaning Machine" add a heating plate at the bottom of the water tank body to heat the water in the drainage area, and a slag basket with corresponding drain outlets at the bottom of the drainage area to facilitate slag removal.

[0004] In the aforementioned cleaning machine employing an open-type water pump, the pump motor and heating plate are located at the bottom of the draining area, which is covered by a draining plate. The spray arms and pump need to be installed through this plate, which is not only inconvenient for installation but also results in water accumulation in the slag collection basket as it flows through the filter of the draining plate into the draining area. Furthermore, existing spray arms are typically supported in the draining area by a guide seat, meaning both the guide seat and the slag collection basket are installed there. Due to space constraints, the suction surface of the guide seat is roughly level with or even higher than that of the slag collection basket. This allows air bubbles to easily enter the pump chamber with the water flow, causing a rapid drop in pump power and a rapid decrease in the spray arm's head, potentially failing to meet basic cleaning requirements. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a cleaning machine that improves the performance of the water pump and the slag collection effect by independently arranging the filtration area and reducing the water absorption surface, in view of the current state of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide a cleaning method using the above-mentioned cleaning machine, in view of the current state of the prior art.

[0007] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is as follows: a cleaning machine, including a box and a slag collection basket, wherein a recessed return water area is provided at the bottom of the box, and a filter plate is provided on the top of the return water area. The lower part of the slag collection basket is accommodated in the return water area and the upper end is exposed above the filter plate. A flow guiding area communicating with the return water area is recessed at the bottom of the box, and a baffle that can cover the flow guiding area is provided on the top of the flow guiding area. A pumping mechanism that can pump water from the return water area through the flow guiding area to the baffle is provided at the bottom of the box.

[0008] In this invention, the pumping mechanism includes a spray arm, an impeller assembly, and a drive unit. The spray arm is mounted on a baffle. The upper part of the impeller assembly extends through the baffle into the spray arm, and the lower part is located in a semi-enclosed space formed by the baffle and the guide area. The drive unit is located at the bottom of the housing, and its power output shaft passes through the guide area and connects to the impeller assembly. Using this structure, an open, pipeless water pump is formed by utilizing the semi-enclosed space created by the baffle and the guide area, facilitating the removal of the baffle for cleaning the pump's interior.

[0009] Preferably, the connection between the spray arm and the baffle is adjacent to and spaced apart from the filter plate. Arranging the spray arm beside the filter plate without it passing through it facilitates assembly, and eliminates filtration at the pump mechanism. This avoids residue accumulation and allows water containing residue to be guided to the filter plate and sludge collection basket at maximum speed and along the shortest path, thus improving sludge collection efficiency.

[0010] Preferably, the semi-enclosed space and the inner cavity of the spray arm for accommodating the upper part of the impeller assembly together constitute the pump chamber of the pumping mechanism, and the junction of the guide area and the return water area constitutes the water inlet of the pump chamber. This structure facilitates the formation of an open pump structure without pipelines.

[0011] Preferably, the upper surface of the baffle plate is smoothly connected to the bottom wall of the tank, and the edge of the baffle plate extends outward and downward at the water inlet of the corresponding pump chamber to form a water guiding surface arranged near the side of the slag collection basket. The upper surface of the baffle plate is roughly flush with the bottom wall of the tank, so it will not obstruct the return water and can make the return water flow quickly to the filter plate, which is beneficial to improving the return water speed and avoiding the accumulation of residue near the spray arm.

[0012] Preferably, a rim is formed at the outer edge of the water guide surface, which partially surrounds the side of the slag collection basket and extends longitudinally. The height of the lower edge of this rim is lower than the height of the water absorption surface at the top of the slag collection basket. Near the filter plate, the slag collection basket has a guide plate that slopes downwards from the edge to the center. The height of the lower edge of this guide plate is the height of the water absorption surface of the slag collection basket. Since the lower edge of the rim is lower than this water absorption surface height, the water absorption surface height of the pump mechanism is effectively lowered below the water absorption surface of the slag collection and return water of the slag collection basket, which avoids the intake of air bubbles and improves pump performance.

[0013] Preferably, the bottom wall of the spray arm has a water inlet, and correspondingly, the baffle has a flow guide sleeve that runs vertically through the middle and connects with the water inlet, and the lower part of the impeller assembly is located in the flow guide sleeve.

[0014] Preferably, the pumping mechanism and the flow guiding area are located in the central part of the bottom of the tank, and the return water area is arranged near the edge of the bottom of the tank and located next to the flow guiding area. Since the top of the flow guiding area is covered by a baffle, the above structure ensures that the central part of the tank remains flat and there is no assembly structure that would obstruct residue and return water, which is beneficial to improving the return water effect and the residue collection effect.

[0015] Preferably, the bottom of the return water area is recessed near the guide area to form a slag collection area. A drain outlet is provided at the bottom of this slag collection area, and the lower part of the slag collection basket is housed within this slag collection area with its lower end corresponding to the drain outlet. The sidewall of the slag collection area near the guide area forms a guide slope that gradually slopes upwards along the water flow. This structure ensures that the water inlet of the pump mechanism and the return water slag collection area maintain the shortest distance, maximizing the transmission of the pump mechanism's suction force to the slag collection basket, thereby increasing the water flow rate at the slag collection basket and improving both the slag collection and return water effects.

[0016] Preferably, the return water area is a rectangular area, with one end of the rectangular area located near a corner of the tank and the second end located near the center of the tank. The sludge collection area is located near the first end of the rectangular area. This arrangement is beneficial for achieving excellent filtration and sludge collection effects.

[0017] Preferably, the bottom of the tank is provided with a heating element located in the return water area and near the second end of the rectangular area.

[0018] Preferably, the inner bottom wall of the tank gradually slopes downward from the edge towards the return water area to form a flow guiding surface. Preferably, the upper surface of the filter plate gradually slopes downward from the edge towards the slag collection basket to form a flow guiding slope.

[0019] Preferably, the bottom of the tank has a water softener outlet located outside the return water area and near the first end of the rectangular area.

[0020] As an improvement, the bottom of the return water area has a drain outlet corresponding to the lower end of the slag collection basket. The lower end of the power output shaft of the drive component protrudes from the bottom of the drive component and is connected to a drain impeller. A drain cavity is provided at the bottom of the drive component, surrounding the drain impeller. This drain cavity is connected to the drain outlet through a water guide pipe. This structure can complete the return water and drainage actions using the same drive mechanism, simplifying the overall structure.

[0021] Preferably, the side of the drainage chamber is connected to a drain pipe for supplying and draining water, and the bottom of the box is provided with a valve that can connect or disconnect the drain pipe.

[0022] Preferably, the bottom wall height of the guide zone is no higher than the bottom wall height of the return water zone and lower than the height of the drain outlet. This structure further prevents air bubbles from entering the return water.

[0023] A cleaning method, which applies the cleaning described above, includes the following steps:

[0024] (1) Add water to the tank, and stop adding water after the required amount of water has been reached;

[0025] When the drive mechanism is running, the power output shaft rotates forward, which drives the impeller assembly to rotate forward. The impeller assembly pumps the water from the return water area through the guide area to the spray arm and sprays it upward. The water that falls after being sprayed is filtered again by the filter plate and the slag is collected in the slag basket before entering the return water area. During this process, the drainage impeller runs idle and does not drain water.

[0026] (2) After cleaning, the drive mechanism runs and the power output shaft reverses. The drainage impeller drains the water in the return water area through the drain outlet, water guide pipe and drainage chamber. During this process, the impeller assembly reverses to form an airflow along the spray arm, the guide area and the return water area. This airflow increases the drainage speed and the cleanliness.

[0027] Compared with the prior art, the advantages of the present invention are as follows: The present invention separates the pumping mechanism from the return water area and the filter plate, that is, the return water area and the filter plate are independently arranged beside the pumping mechanism, and the pumping mechanism does not need to pass through the filter plate for installation, which provides convenience for assembly; at the same time, the baffle does not participate in filtration, eliminating the disadvantages of poor filtration effect and accumulation of residue at the drive mechanism, and the water flows more and faster through the filter plate and through the sludge collection basket, which is conducive to improving the filtration and sludge collection effect; since the pumping mechanism is not installed in the return water area, the limitation of installation space is eliminated, and it is easy to reduce the water suction surface of the pumping mechanism to avoid air bubbles entering the return water, which is conducive to improving the pump performance. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A sectional view;

[0030] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0031] Figure 4 for Figure 1 A schematic diagram of the structure of the hidden spray arm;

[0032] Figure 5 for Figure 4 A schematic diagram of the hidden filter plate in the middle;

[0033] Figure 6 for Figure 5 A schematic diagram of the structure of the hidden slag collection basket and baffle;

[0034] Figure 7 This is a schematic diagram of the baffle structure in an embodiment of the present invention. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] like Figures 1-7 As shown, the cleaning machine of this embodiment includes a housing 1 and a slag collection basket 2. The bottom of the housing 1 is provided with a recessed return water area 11. The top of the return water area 11 is covered by a filter plate 12. The lower part of the slag collection basket 2 is accommodated in the return water area 11 and the upper end is exposed above the filter plate 12. The bottom of the housing 1 is provided with a guide area 13 that communicates with the return water area 11. The top of the guide area 13 is provided with a baffle 3 that can cover it. The bottom of the housing 1 is provided with a pumping mechanism 4 that can pump water from the return water area 11 through the guide area 13 to the baffle 3.

[0037] In this embodiment, the pumping mechanism 4 is an open-type water pump, including a spray arm 41, an impeller assembly 42, and a drive unit 43. The spray arm 41 is mounted on the baffle 3. The upper part of the impeller assembly 42 is a centrifugal impeller used to disperse water circumferentially in the flow channel of the spray arm, and the lower part of the impeller assembly 42 is an axial flow impeller used to draw water from the guide area 13 upwards into the spray arm 41. The upper part of the impeller assembly 42 extends through the baffle 3 into the spray arm 41, and the lower part is located in the semi-enclosed space 100 formed by the baffle 3 and the guide area 13. The drive unit 43 is a motor, located at the bottom of the housing 1, and its power output shaft 431 passes through the guide area 13 and is connected to the impeller assembly 42. With the above structure, an open-type pipeless water pump is formed by utilizing the semi-enclosed space formed by the baffle 3 and the guide area 13, which facilitates the removal of the baffle 3 for cleaning the inside of the water pump.

[0038] The connection between the spray arm 41 and the baffle 4 is adjacent to and spaced apart from the filter plate 12. Arranging the spray arm 41 beside the filter plate 12 without passing through it facilitates assembly. Furthermore, the pump mechanism 4 does not perform filtration, which avoids residue accumulation and allows the water containing residue to be guided to the filter plate and the sludge collection basket 2 at the maximum speed and with the shortest path, thus improving the sludge collection effect.

[0039] The aforementioned semi-enclosed space 100 and the inner cavity of the spray arm 41 used to accommodate the upper part of the impeller assembly 42 together constitute the pump chamber of the pumping mechanism 4, and the connection between the guide area 13 and the return water area 11 constitutes the water inlet 401 of the pump chamber. This structure facilitates the formation of an open water pump structure without pipelines.

[0040] In this embodiment, the upper surface of the baffle 3 is smoothly connected to the inner bottom wall of the housing 1. The edge of the baffle 3 extends outward and downward at the corresponding pump inlet 401 to form a water guiding surface 31 arranged near the side of the slag collection basket 2. This water guiding surface 31 is a slightly concave arc surface. The upper surface of the baffle 3 is roughly flush with the bottom wall of the housing 1, so it will not obstruct the return water and can make the return water flow quickly to the filter plate 12, which is beneficial to improve the return water speed and avoid the accumulation of residue near the spray arm 41.

[0041] A perimeter 32 is formed at the outer edge of the water guiding surface 31, which partially surrounds the side of the slag collection basket 2 and extends longitudinally. The height of the lower edge of the perimeter 32 is lower than the height of the top water absorption surface of the slag collection basket 2. A guide plate 21 is formed near the filter plate 12, which slopes downward from the edge to the center. The height of the lower edge of the guide plate 21 is the height of the water absorption surface of the slag collection basket 2. The lower edge of the perimeter 32 is lower than the height of the water absorption surface. In effect, the height of the water absorption surface of the pumping mechanism 4 is lowered to below the water absorption surface of the slag collection basket 2 for slag collection and water return, which can avoid the intake of air bubbles and improve the performance of the pump.

[0042] A water inlet 411 is provided on the bottom wall of the spray arm 41. Correspondingly, a guide sleeve 33 is provided in the middle of the baffle 3, which runs vertically through the baffle and connects with the water inlet 411. The lower part of the impeller assembly 42 is located in the guide sleeve 33. The spray arm 41 is rotatably mounted on the top of the guide sleeve 33 by means of a retaining ring. The specific rotatable connection structure is a mature existing technology and will not be described in detail again.

[0043] In this embodiment, the pumping mechanism 4 and the flow guiding area 13 are located at the center of the bottom of the tank 1, and the return water area 11 is arranged near the edge of the bottom of the tank 1 and located beside the flow guiding area 13. Since the top of the flow guiding area 13 is covered by the baffle 3, the above structure ensures that the central part of the tank 1 remains flat and there is no assembly structure that would obstruct residue and return water, which is beneficial to improving the return water effect and the residue collection effect.

[0044] The bottom of the return water area 11 is recessed near the guide area 13 to form a slag collection area 14. A drain outlet 141 is opened at the bottom of this slag collection area 14. The lower part of the slag collection basket 2 is housed in this slag collection area 14, with its lower end corresponding to the drain outlet 141. The sidewall of the slag collection area 14 near the guide area 13 forms a guide slope 142 that gradually slopes upwards along the water flow. This structure ensures that the water inlet 401 of the pumping mechanism 4 maintains the shortest distance from the return water slag collection area, maximizing the transmission of the pumping mechanism 4's suction force to the slag collection basket 2, thereby increasing the water flow rate at the slag collection basket 2 and improving both the slag collection and return water effects.

[0045] In this embodiment, the return water area 11 is a rectangular area. The first end of the rectangular area is arranged near one corner of the tank 1, and the second end is arranged near the middle of the tank 1. The sludge collection area 14 is arranged near the first end of the rectangular area. This arrangement is conducive to achieving excellent filtration and sludge collection effects.

[0046] A heating element 5 is located at the bottom of the tank body 1, situated in the return water area 11 and near the second end of the rectangular area. The inner bottom wall of the tank body 1 slopes downwards from the edge towards the return water area 11 to form a flow guide surface 10. The upper surface of the filter plate 12 slopes downwards from the edge towards the sludge collection basket 2 to form a flow guide slope 121. A water softener outlet 6 is located at the bottom of the tank body 1, outside the return water area 11 and near the first end of the rectangular area.

[0047] In this embodiment, the lower end of the power output shaft 431 of the drive component 43 protrudes from the bottom of the drive component 43 and is connected to a drainage impeller 7. A drainage chamber 430 is provided at the bottom of the drive component 43, surrounding the drainage impeller 7. The drainage chamber 430 is connected to the drain outlet 141 through a water guide pipe 432. This structure can complete the return water and drainage actions using the same drive mechanism, simplifying the overall structure. A drain pipe for supplying and draining water is connected to the side of the drainage chamber 430, and a valve that can connect or disconnect the drain pipe is provided at the bottom of the housing 1.

[0048] In this embodiment, the bottom wall height of the flow guiding area 13 is no higher than the bottom wall height of the return water area 11, and lower than the bottom of the slag collection area 14 and the height of the drain outlet 141. This structure can further prevent air bubbles from entering the return water.

[0049] The cleaning method in this embodiment is completed using the cleaning described above, and includes the following steps:

[0050] (1) Add water to tank 1, and stop adding water after the required amount of water has been reached;

[0051] When the drive mechanism 4 is running, the power output shaft 431 rotates forward, driving the impeller assembly 42 to rotate forward. The impeller assembly 42 pumps the water from the return water area 11 through the guide area 13 to the spray arm 41 and sprays it upward. The water that falls after being sprayed is filtered again through the filter plate 12 and the slag is collected in the slag basket 2 before entering the return water area 11. During this process, the drainage impeller 7 idles and does not drain water.

[0052] (2) After cleaning, the drive mechanism 4 runs, the power output shaft 431 reverses, and the drainage impeller 7 drains the water in the return water area 11 through the drain outlet 141, the water guide pipe 432, and the drainage chamber 430. During this process, the impeller assembly 42 reverses to form an airflow along the direction of the spray arm 41, the guide area 13, and the return water area 11. This airflow can improve the drainage speed and the degree of drainage.

[0053] 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) and a slag collection basket (2), wherein the bottom of the housing (1) is provided with a recessed return water area (11), the top of the return water area (11) is covered with a filter plate (12), and the lower part of the slag collection basket (2) is accommodated in the return water area (11) and the upper end is exposed above the filter plate (12), characterized in that: The bottom of the box (1) is recessed and has a flow guide area (13) that communicates with the return water area (11). The top of the flow guide area (13) is provided with a baffle (3) that can cover it. The bottom of the box (1) is provided with a pumping mechanism (4) that can pump water from the return water area (11) through the flow guide area (13) to the baffle (3). The pumping mechanism (4) includes a spray arm (41), an impeller assembly (42), and a drive unit (43). The spray arm (41) is mounted on the baffle (3). The upper part of the impeller assembly (42) extends through the baffle (3) into the spray arm (41), and the lower part is located in the semi-enclosed space (100) formed by the baffle (3) and the guide area (13). The drive unit (43) is located at the bottom of the housing (1), and the power output shaft (431) is located at the bottom. The spray arm (41) and the baffle (3) are connected to the impeller assembly (42) through the guide area (13); the connection between the spray arm (41) and the baffle (3) is adjacent to the filter plate (12) and the semi-enclosed space (100) and the inner cavity of the spray arm (41) used to accommodate the upper part of the impeller assembly (42) together constitute the pump chamber of the pumping mechanism (4); the connection between the guide area (13) and the return water area (11) constitutes the water inlet (401) of the pump chamber.

2. The cleaning machine according to claim 1, characterized in that: The upper surface of the baffle (3) is smoothly connected to the inner bottom wall of the box (1), and the edge of the baffle (3) extends outward and downward at the corresponding pump chamber inlet (401) to form a water guiding surface (31) arranged near the side of the slag collection basket (2).

3. The cleaning machine according to claim 2, characterized in that: The outer edge of the water guiding surface (31) is formed with a rim (32) that partially surrounds the side of the slag collection basket (2) and extends longitudinally. The height of the lower edge of the rim (32) is lower than the height of the top water absorption surface of the slag collection basket (2).

4. The cleaning machine according to claim 1, characterized in that: The bottom wall of the spray arm (41) has an inlet (411). Correspondingly, the baffle (3) has a guide sleeve (33) that runs vertically through the middle and is connected to the inlet (411). The lower part of the impeller assembly (42) is located in the guide sleeve (33).

5. The cleaning machine according to any one of claims 1 to 4, characterized in that: The pumping mechanism (4) and the flow guiding area (13) are located at the center of the bottom of the tank (1), and the return water area (11) is arranged near the edge of the bottom of the tank (1) and is located on the side of the flow guiding area (13).

6. The cleaning machine according to claim 5, characterized in that: The bottom of the return water area (11) is recessed near the flow guiding area (13) to form a slag collection area (14). The bottom of the slag collection area (14) has a drain outlet (141). The lower part of the slag collection basket (2) is housed in the slag collection area (14) and its lower end is arranged corresponding to the drain outlet (141).

7. The cleaning machine according to claim 6, characterized in that: The return water area (11) is a rectangular area. The first end of the rectangular area is arranged near one corner of the box (1), and the second end is arranged near the middle of the box (1). The slag collection area (14) is arranged near the first end of the rectangular area.

8. The cleaning machine according to claim 7, characterized in that: The bottom of the box (1) is provided with a heating element (5) located in the return water area (11) and near the second end of the rectangular area.

9. The cleaning machine according to claim 7, characterized in that: The inner bottom wall of the box (1) gradually slopes downward from the edge toward the return water area (11) to form a guide surface (10).

10. The cleaning machine according to claim 7, characterized in that: The bottom of the housing (1) has a water softener outlet (6) located outside the return water area (11) and close to the first end of the rectangular area.

11. The cleaning machine according to any one of claims 1 to 4, characterized in that: The upper surface of the filter plate (12) gradually slopes downward from the edge toward the slag collection basket (2) to form a guide slope (121).

12. The cleaning machine according to any one of claims 1 to 4, characterized in that: The bottom of the return water area (11) has a drain outlet (141) corresponding to the lower end of the slag collection basket (2). The lower end of the power output shaft (431) of the drive member (43) is exposed at the bottom of the drive member (43) and connected to a drain impeller (7). The bottom of the drive member (43) is provided with a drain cavity (430) arranged around the drain impeller (7). The drain cavity (430) is connected to the drain outlet (141) through a water guide pipe (432).

13. The cleaning machine according to claim 12, characterized in that: The side of the drainage chamber (430) is connected to a drain pipe for water to be drained, and the bottom of the box (1) is provided with a valve that can connect or disconnect the drain pipe.

14. The cleaning machine according to claim 12, characterized in that: The bottom wall height of the flow guiding area (13) is not higher than the bottom wall height of the return water area (11) and lower than the height of the drain outlet (141).

15. A cleaning method, characterized in that... The cleaning method is performed using the cleaning machine described in claim 12, 13, or 14, and includes the following steps: (1) Add water to the tank (1) until the required amount of water is reached, then stop adding water. When the drive mechanism is running, the power output shaft (431) rotates forward, driving the impeller assembly (42) to rotate forward. The impeller assembly (42) pumps the water from the return water area (11) through the guide area (13) to the spray arm (41) and sprays it upward. The water that falls after being sprayed is filtered again by the filter plate (12), and the slag is collected by the slag collection basket (2) before entering the return water area (11). During this process, the drainage impeller (7) idles and does not drain water. (2) After cleaning, the drive mechanism runs and the power output shaft (431) reverses. The drainage impeller (7) drains the water in the return water area (11) through the drain outlet (141), the water guide pipe (432), and the drainage chamber (430). During this process, the impeller assembly (42) reverses to form an airflow along the direction of the spray arm (41), the guide area (13), and the return water area (11). This airflow increases the drainage speed and the degree of drainage.

Images