A cleaning machine

Abstract

This invention relates to a cleaning machine, comprising a housing with a recessed drainage area at the bottom. The top of this drainage area is covered by a drainage board, and a slag collection basket is mounted on the drainage board. The lower part of the slag collection basket is housed within the drainage area, and the basket is positioned near the first edge of the drainage board. The drainage board gradually slopes downwards from the first edge towards the slag collection basket, forming a first guide slope. The drainage board further extends downwards from a second edge opposite the first edge towards the slag collection basket, forming a second guide slope, with the slope of the second guide slope being less than that of the first guide slope. This invention divides the drainage board into three areas with different slopes based on the distance from the slag collection basket, thereby preventing fine residue from clogging the drainage board under water pressure, maintaining a large water flow area, and improving the return water effect. Furthermore, it allows for a higher water flow velocity at the slag collection basket, which helps to firmly collect the residue, resulting in good slag collection.

Description

Technical Field

[0001] This invention relates to a washing machine for cleaning dishes, fruits and vegetables. Background Technology

[0002] For countertop and cabinet dishwashers, due to their large washing space, they are generally designed with three spray arms: top, middle, and bottom, to achieve better washing results. During operation, the washing pump delivers water through pipes to the top, middle, and bottom spray arms. The water sprays out from the top, middle, and bottom spray arms, rinses the dishes, and then falls back into the water cup at the bottom of the dishwasher. The washing pump then delivers the fallen water back to the top, middle, and bottom spray arms to complete one cycle.

[0003] For example, Chinese invention patent application CN106859563A, entitled "Energy-Saving Dishwasher" (application number: CN201611232345.5), discloses a structure that includes a cavity for accommodating tableware and providing a cleaning space, a spray system for spraying water to clean the tableware, and a pump for drawing water and supplying water to the spray system. The spray system is disposed within the cavity. The pump's suction end is connected to the cavity, and its supply end is connected to the spray system. The spray system includes an inner water pipe and two or more spray devices, each set of spray devices being disposed on the inner water pipe. The pump's supply end is connected to a water distribution device, which has two or more water outlets corresponding to the two or more spray devices, and the spray devices are connected to the corresponding water outlets. During operation, the water distribution device opens one or more water outlets according to instructions, enabling one or more spray devices to perform cleaning work.

[0004] In existing dishwasher water flow systems, the bottom spray arm is typically located in the center above the filter screen, while the waste collection basket is positioned beside it. Waste collection relies on gravity, passing through the filter screen and then being collected in the basket before being discharged. During drainage, the rapid water flow on the filter screen causes small debris to easily remain, while the waste collection basket's effectiveness is poor. Furthermore, the high water flow on the filter screen results in a slower flow through the waste collection basket, making it easier for small debris to clog the filter holes under the influence of the higher water flow velocity, thus affecting the smoothness of waste discharge and the return water effect. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a cleaning machine that improves the slag collection effect and avoids the clogging of the filter screen, thereby improving the return water effect, in view of the current situation of the prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a cleaning machine, including a box body, wherein a recessed drainage area is provided at the bottom of the box body, the top of the drainage area is covered by a drainage plate, and a slag collection basket is provided on the drainage plate, the lower part of the slag collection basket being accommodated in the drainage area, characterized in that: the slag collection basket is arranged near the first edge of the drainage plate, the drainage plate gradually slopes downward from the first edge toward the slag collection basket to form a first guide slope, and the drainage plate gradually extends downward from the second edge opposite to the first edge toward the slag collection basket to form a second guide slope, and the slope of the second guide slope is less than the slope of the first guide slope.

[0007] Preferably, the second guide slope includes a first inclined portion near the second edge of the drain plate and a second inclined portion near the slag collection basket, wherein the slope of the first inclined portion is less than the slope of the second inclined portion. The angle between the first inclined portion and the horizontal plane is 0.5° to 2°, preferably 1°; the angle between the second inclined portion and the horizontal plane is 9° to 13.5°, preferably 12°. The angle between the first guide slope and the horizontal plane is 13° to 16.5°, preferably 14.5°.

[0008] The cleaning machine of the present invention further includes a water pumping mechanism and a water supply pipe. The water pumping mechanism is used to pump water from the draining area to above the drain plate. The lower end of the water supply pipe passes through the drain plate and is in fluid communication with the water pumping mechanism. The drain plate includes...

[0009] The first part, arranged and positioned on the box body close to the first edge of the drainage area, is used to provide an assembly area for the water supply pipes.

[0010] The second part is spliced ​​together with the first part and locked onto the box body by a detachable connection structure;

[0011] The third part consists of a second edge arranged close to the drainage area and opposite to the first edge, which is spliced ​​together with the second part. The third part is detachably constrained to the box body.

[0012] The second part or the junction of the second part and the third part has an installation port that is connected to the pump mechanism.

[0013] To accommodate the open-type water pump structure of this invention, the drain plate is configured as three interconnectable parts. The first part is small in size, making it easy to assemble with the water supply pipe. The first part is fixed to the bottom of the box by the water supply pipe at the factory. The second and third parts cover the main area of ​​the drain area. The second part is locked to the box. When the drain area needs to be cleaned, only the third part needs to be removed, making the operation convenient.

[0014] In this invention, the slag collection basket is disposed on the third part, the upper wall of the second part forms the first inclined portion, the upper wall of the third part located between the second part and the slag collection basket forms the second inclined portion, and the upper wall of the third part on the side away from the second part forms the first guide slope. Because the drain plate of this invention adopts a spliced ​​structure, the division of guide areas with different slopes through this spliced ​​structure is beneficial to improving the return water effect and the slag collection effect.

[0015] Preferably, the second part has a semi-circular first notch at its edge, and correspondingly, the third part has a semi-circular second notch at its edge. The first and second notches mate to form the mounting opening. In actual use, the second part is secured to the bottom wall of the housing with screws, and the third part is directly supported at the edge of the second part and the drain area. When cleaning the drain area, neither the first nor the second part needs to be removed; only the third part needs to be taken out. The aforementioned mateable first and second notch structure facilitates the removal of only the third part.

[0016] Preferably, the pumping mechanism has a support plate arranged close to the lower edge of the mounting port. A first protruding ring extending upwards is provided at the first notch, and a second protruding ring extending upwards is provided at the second notch. The first and second protruding rings engage to form an assembly ring that surrounds the support plate. A detachable retaining ring is provided above the drain plate, which is snapped onto the support plate with its lower edge pressed against the first and second protruding rings. The retaining ring is installed on the support plate via a snap-fit ​​structure. This retaining ring facilitates the installation of the upper housing described below. Simultaneously, it can also press the third part onto the second part. When disassembling the third part, the upper housing and retaining ring are removed, and then the third part is disassembled, making the operation convenient.

[0017] Preferably, the second part is a plastic part, the first convex ring is integrally formed with the second part, and the third part is a metal part, with the second convex ring being a plastic part fused to the third part. This structure helps improve the assembly compactness and practicality of the drain plate.

[0018] The pumping mechanism of the present invention includes:

[0019] The upper impeller is a centrifugal impeller, and the lower impeller is an axial flow impeller;

[0020] The lower impeller is a centrifugal impeller;

[0021] The upper housing has a first accommodating cavity for mounting the upper part of the upper impeller, and the top wall and / or side wall of the upper housing have spray holes in fluid communication with the first accommodating cavity; and

[0022] A lower housing is connected below the upper housing. The upper part of the lower housing has a second accommodating cavity for installing the lower part of the upper impeller. The second accommodating cavity is connected to the first accommodating cavity. A first water inlet is opened on the side wall of the lower housing to supply water into the second accommodating cavity. The first water inlet is located in the drainage area. The lower part of the lower housing has a third accommodating cavity for installing the lower impeller. A second water inlet is opened on the bottom wall of the lower housing to supply water into the third accommodating cavity. A water outlet is opened on the side wall of the lower housing to supply water out of the third accommodating cavity. The water outlet is connected to the water supply pipe.

[0023] The bottom of the aforementioned upper housing is rotatably constrained to the retaining ring.

[0024] The above structure actually constitutes an open dual-pump system, in which the second and first accommodating chambers and the upper impeller in the upper part supply water for bottom spraying, and the third accommodating chamber and the lower impeller in the lower part supply water for top and / or middle spraying. Since the power of the two water flows is independently supplied by the corresponding pumps, the head and flow rate of each water flow are increased, which is beneficial to improving the cleaning effect.

[0025] In the above solution, a U-shaped groove is provided at the inner edge of the first part, and correspondingly, a retaining edge extends downward at the corresponding edge of the second part to form a retaining edge that can be engaged in the U-shaped groove. This structure facilitates the splicing of the first and second parts while maintaining a tight seal at the splice. Furthermore, since the connection between the water supply pipe and the water distribution chamber is already formed at the factory, meaning the first part is constrained at the bottom of the housing and cannot be disassembled, the second part needs to be detachable to facilitate cleaning of the drainage area. The retaining edge of the second part is pressed into the U-shaped groove. When disassembling the second part, the constraint between the second part and the housing is removed, allowing the second part to be moved upwards and removed directly, facilitating assembly and disassembly.

[0026] Preferably, the U-shaped groove is formed by recessing the inner edge of the first part, and in the assembled state, the upper wall surface of the first part and the upper wall surface of the second part are approximately flush at the joint. This structure helps to maintain good water flow guidance and avoids obstructing the water flow direction, thus affecting the return water effect.

[0027] Preferably, the assembly platform has a water inlet communicating with the water distribution chamber, and the first part has an assembly port corresponding to the water inlet. The lower end of the water supply pipe has a plug-in portion that passes through the assembly port and is sealed to the water inlet. A boss that can press against the first part is formed at the connection between the water supply pipe and the plug-in portion. This structure helps to improve the compactness and sealing of the connection between the water supply pipe, the first part, the assembly platform, and the water distribution chamber.

[0028] Preferably, the inner wall of the assembly port has a through slot extending vertically, and correspondingly, the outer peripheral wall of the insertion part is provided with a protruding clip that can pass through the slot and engage with the lower wall surface of the first part. This structure can prevent the water supply pipe from becoming loose and affecting the positioning of the first part, and also prevent the lower end of the water supply pipe from detaching.

[0029] Preferably, the upper wall of the assembly platform is provided with an assembly kit extending upward around the water inlet. In the assembled state, the outer peripheral wall of the insertion part is arranged close to the inner peripheral wall of the assembly kit, and a sealing ring is provided between the two. This structure helps to further improve the connection sealing performance.

[0030] Preferably, the outer edge of the first portion extends downward to form a first perimeter edge that is close to the inner peripheral wall of the drainage area, and the outer edge of the second portion extends downward to form a second perimeter edge that is close to the inner peripheral wall of the drainage area. This structure can improve the compactness of the connection between the drainage board and the box body, and avoid the accumulation of residue at the connection gap between the two.

[0031] For ease of disassembly and assembly, the second part is secured to the bottom wall of the housing with screws.

[0032] Preferably, the second part has a U-shaped mounting groove near the edge of the third part, and correspondingly, the corresponding edge of the third part extends downward to form a protruding edge that can be engaged in the mounting groove. The mounting groove is formed by the recessed edge of the second part, and in the assembled state, the upper wall surface of the second part and the upper wall surface of the third part are approximately flush at the joint. When cleaning the draining area is required, only the third part needs to be disassembled, and the above structure facilitates the disassembly of the third part.

[0033] As an improvement, a U-shaped guide port is provided on the outer wall of the assembly groove, which is connected to the bottom of the assembly groove. Since the joint between the second and third parts is roughly located in the center of the bottom of the box, small food residues in the falling water flow can easily enter the gap between the second and third parts. With the above structure, the impact force of the falling water flow can be used to flush the small residues in the gap into the drainage area through the guide port, avoiding the growth of bacteria due to long-term lack of cleaning.

[0034] Preferably, the third part is provided with an opening, the top of the slag collection basket has a support edge that rests on the upper edge of the opening, the lower part of the slag collection basket is accommodated in the drainage area, the bottom of the box has a drain outlet, and the bottom of the slag collection basket is detachably locked at the edge of the drain outlet. With the above structure, the third part can be limited, and after the slag basket is removed, the limitation on the third part can be released, facilitating the removal of the third part.

[0035] Compared with the prior art, the advantages of the present invention are as follows: The present invention divides the drain plate into three areas with different slopes according to the distance from the slag collection basket. The first guide slope is the closest to the slag collection basket and has the largest slope, which can quickly guide the water flow to the slag collection basket. The outer edge of the second guide slope is farther from the slag collection basket and has a smaller slope. While guiding the water flow to the slag collection basket, it slows down the water flow speed through the drain plate, thereby preventing fine residue from clogging the drain plate under water pressure, maintaining a large water flow area, and improving the water return effect. The water flow velocity at the slag collection basket is relatively large, which helps to firmly collect the residue in the slag collection basket, resulting in a good slag collection effect. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0037] Figure 2 This is a partial structural schematic diagram of an embodiment of the present invention;

[0038] Figure 3 This is a cross-sectional view of an embodiment of the present invention;

[0039] Figure 4 This is another cross-sectional view of an embodiment of the present invention;

[0040] Figure 5 for Figure 3 Enlarged view of section A;

[0041] Figure 6 This is a schematic diagram of the assembly structure of the water supply pipe and the drain plate according to an embodiment of the present invention;

[0042] Figure 7 for Figure 6 Exploded view;

[0043] Figure 8 This is a schematic diagram of the structure of the shell in an embodiment of the present invention;

[0044] Figure 9 This is a schematic diagram of the structure of the drain plate according to an embodiment of the present invention;

[0045] Figure 10 for Figure 9 Exploded view;

[0046] Figure 11 This is a cross-sectional view of the drain plate in an embodiment of the present invention. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0048] like Figures 1-10As shown, the cleaning machine in this embodiment includes a housing 6, a first water outlet structure, a second water outlet structure b, and a pumping mechanism a. The bottom of the housing 6 is provided with a recessed drainage area 61, and the top of the drainage area 61 is covered with a drainage plate 62. The pumping mechanism a is used to provide water outlet power for the first water outlet structure and the second water outlet structure b. The first water outlet structure is located at the bottom of the housing 6 and above the drainage plate 62. The second water outlet structure b is located above the first water outlet structure and is in fluid communication with the pumping mechanism a through a water supply pipe 7.

[0049] The aforementioned drain plate 62 includes a first part 62a, a second part 62b, and a third part 62c that can be spliced ​​together. The size of the first part 62a matches the outer width of the water supply pipe 7. The bottom wall of the drain area 61 extends upward to form an assembly platform 616 arranged close to the lower wall of the first part 62a. Below the assembly platform 616 is a water distribution chamber 617 that is in fluid communication with the water pump mechanism a. The lower end of the water supply pipe 7 passes through the first part 62a and connects to the water distribution chamber 617, pressing the first part 62a tightly onto the assembly platform 616. The second part 62b is detachably connected to the bottom of the housing 6. A water distribution valve 8 is provided in the water distribution chamber 617 to control the water supply of the water supply pipe 7.

[0050] A U-shaped groove 621 is provided at the inner edge of the first part 62a. Correspondingly, a retaining edge 622 extends downward at the corresponding edge of the second part 62b to form a retaining edge 622 that can be engaged in the U-shaped groove 621. The second part 62b is locked to the bottom wall of the housing 6 by screws. With the above structure, on the one hand, it is convenient to splice the first part 62a and the second part 62b and maintain the sealing of the splice; on the other hand, at the time of manufacture, the connection between the water supply pipe 7 and the water distribution chamber 617 has been formed, that is, the first part 62a is constrained to the bottom of the housing 6 and cannot be disassembled. However, in order to facilitate the cleaning of the part in the drain area 61, the second part 62b needs to be disassembled. The retaining edge 622 of the second part 62b is pressed in the U-shaped groove 621. When disassembling the second part 62b, the screw locking relationship between the second part 62b and the housing 6 is removed, and the second part 62b can be directly moved upward and removed, which is convenient for disassembly and assembly.

[0051] The aforementioned U-shaped groove 621 is formed by lowering the inner edge of the first part 62a. In the assembled state, the upper wall surface of the first part 62a and the upper wall surface of the second part 62b are approximately flush at the joint. This structure helps to maintain good water flow guidance and avoids obstructing the water flow direction, thus affecting the return water effect.

[0052] The assembly platform 616 has a water inlet 6161 that communicates with the water distribution chamber 617. The first part 62a has an assembly port 623 corresponding to the water inlet 6161. The lower end of the water supply pipe 7 has a plug-in part 70 that passes through the assembly port 623 and is sealed to the water inlet 6161. A boss 701 that can press against the first part 62a is formed at the connection between the water supply pipe 70 and the plug-in part 70. This structure helps to improve the compactness and sealing of the connection between the water supply pipe 7, the first part 62a, the assembly platform 616, and the water distribution chamber 617. The inner wall of the assembly port 623 has a through slot 6231. Correspondingly, the outer peripheral wall of the plug-in part 70 is provided with a protrusion 702 that can pass through the slot 6231 and engage with the lower wall of the first part 62a. This structure prevents the water supply pipe 7 from becoming loose and affecting the positioning of the first part 62a, and also prevents the lower end of the water supply pipe 7 from detaching.

[0053] The upper wall of the assembly table 616 is provided with an assembly fitting 6162 extending upward around the water inlet 6161. In the assembled state, the outer peripheral wall of the insertion part 70 is arranged close to the inner peripheral wall of the assembly fitting 6162, and a sealing ring 703 is provided between the two. This structure helps to further improve the connection sealing performance.

[0054] In this embodiment, a first perimeter 624 extends downward from the outer edge of the first part 62a, forming a perimeter close to the inner wall of the drainage area 61, and a second perimeter 625 extends downward from the outer edge of the second part 62b, forming a perimeter close to the inner wall of the drainage area 61. This structure improves the compactness of the connection between the drainage plate 62 and the box 6, and avoids the accumulation of residue at the connection gap.

[0055] The third part 62c is positioned close to the second edge of the drainage area 61, opposite to the first edge, and is spliced ​​with the second part 62b. The third part 62c is detachably constrained to the housing 6. The connection between the second part 62b and the third part 62c has an installation port 60 that mates with the water pump mechanism a.

[0056] Specifically, the second part 62b has a semi-circular first notch 601 at its edge, and correspondingly, the third part 62c has a semi-circular second notch 602 at its edge. The first notch 601 and the second notch 602 fit together to form an installation opening 60. In actual use, the second part 62b is fastened to the bottom wall of the housing 6 with screws, and the third part 62c is directly supported at the edge of the second part 62b and the drainage area 61.

[0057] The water pumping mechanism a has a support plate 44 arranged close to the lower edge of the mounting port 60. A first protruding ring 6011 extending upward is provided at the first notch 601, and a second protruding ring 6021 extending upward is provided at the second notch 602. The first protruding ring 6011 and the second protruding ring 6021 are engaged with each other to form an assembly ring that can surround the periphery of the support plate 44. A retaining ring 603 is provided above the drain plate 62, which is detachably locked onto the support plate 44 and whose lower edge is pressed against the first protruding ring 6011 and the second protruding ring 6021. The retaining ring 603 is installed on the support plate 44 by a snap-fit ​​structure.

[0058] The first part 62a and the second part 62b are plastic parts. The first convex ring 6011 is integrally molded with the second part 62b by injection molding. The third part 62c is a metal part, and the second convex ring 6021 is a plastic part fused to the third part 62c. This structure helps to improve the assembly compactness and practicality of the drain plate.

[0059] The pumping mechanism a in this embodiment includes an upper impeller 1, a lower impeller 2, an upper housing 3, a lower housing 4, and a driving component 5.

[0060] The upper impeller 1 has centrifugal blades at the top and axial blades at the bottom. The lower impeller 2 is a centrifugal impeller.

[0061] The upper housing 3 is rotatably disposed above the drain plate 62. The upper housing 3 has a body extending in the length direction. The central part of the body has a first accommodating cavity 31 for mounting the upper impeller 1. The two sides of the body have flow channels communicating with the first accommodating cavity 31. The top wall of the upper housing 3 has a spray hole 32 communicating with the flow channel.

[0062] The lower housing 4 is connected to the lower part of the upper housing 3. The upper part of the lower housing 4 has a second accommodating cavity 41 for installing the lower part of the upper impeller 1. The side wall of the lower housing 4 has a first water inlet 411 for water to enter the second accommodating cavity 41. The lower part of the lower housing 4 has a third accommodating cavity 42 for installing the lower impeller 2. The bottom wall of the lower housing 4 has a second water inlet 421 for water to enter the third accommodating cavity 42, and the side wall has a water outlet 422 for water to be output from the third accommodating cavity 42. The water outlet 422 is connected to the water distribution cavity 617.

[0063] The bottom of the lower housing 4 is located in the drainage area 61 and has a water passage gap between it and the bottom wall of the drainage area 61.

[0064] The bottom of the upper housing 3 is rotatably secured to the retaining ring 603 by a snap fastener. The retaining ring 603 facilitates the installation of the upper housing 3 and also presses the third part 62c against the second part 62b.

[0065] The second part 62b has a U-shaped mounting groove 626 near the edge of the third part 62c. Correspondingly, the corresponding edge of the third part 62c extends downward to form a protruding edge 627 that can be engaged in the mounting groove 626. The mounting groove 626 is formed by the recessed edge of the second part 62b. In the assembled state, the upper wall surface of the second part 62b and the upper wall surface of the third part 62c are approximately flush at the joint.

[0066] A U-shaped guide port 6261, which communicates with the bottom of the assembly groove 626, is opened on the outer wall of the assembly groove 626. Since the joint between the second part 62b and the third part 62c is roughly located in the center of the bottom of the box 6, small food residues in the falling water flow can easily enter the gap between the second part 62b and the third part 62c. With the above structure, the slapping force of the falling water flow can be used to flush the small residues in the gap into the drainage area through the guide port, avoiding the growth of bacteria due to long-term lack of cleaning.

[0067] The third part 62c is provided with a slag collection basket 9 and an opening 628. The top of the slag collection basket 9 has a support edge 91 that rests on the upper edge of the opening 628. The lower part of the slag collection basket 9 is accommodated in the drainage area 61. The bottom wall of the box 6 in the drainage area 61 is recessed with a first receiving groove 611 for installing the lower part of the pump mechanism a. A second receiving groove 612 with a depth greater than the first receiving groove 611 is provided on the side of the first receiving groove 611. The lower part of the slag collection basket 9 is accommodated in the second receiving groove 612. The bottom of the second receiving groove 612 has a drain outlet 613. The outer bottom of the box 6 is provided with a drain valve and a drain pump structure that communicates with the drain outlet 613. The side of the first receiving groove 611 has an opening 6111 that communicates with the side of the second receiving groove 612. The first water inlet 411 of the pumping mechanism a is located above the opening 6111, and a suction nozzle 40 extending obliquely downward to the opening 6111 is connected to the first water inlet 411. The second water inlet 421 is located beside the opening 6111. The bottom of the second receiving trough 612 is the lowest point of the drainage area 61. Placing the drain outlet 613 here helps to drain residual water and prevents the growth of bacteria due to water retention. By setting the first receiving trough 611 and the second receiving trough 612, the position of the water inlet of the pump mechanism a is greatly lowered, isolating air bubbles above the water level and preventing the intake of air bubbles from affecting the water flow head. During the cleaning process, after the water flows through the slag collection basket 9 for filtration, it is transported to the pump mechanism a through the second receiving trough 612. The first receiving trough 611, in addition to assembling the pump mechanism a, can also cooperate with the second receiving trough 612 to guide the flow. The suction nozzle 40 further reduces the suction height and helps to reduce energy loss and increase the water jet head.

[0068] The bottom of the slag collection basket 9 is snapped onto the edge of the drain outlet 613 by a snap-on detachable mechanism.

[0069] In this embodiment, when it is necessary to clean the drainage area 61, only the third part 62c is disassembled. When disassembling the third part 62c, the retaining ring 603 is removed to release the pressure of the retaining ring 603 on the third part 62c. Then the slag collection basket 9 is taken out to release the constraint of the slag collection basket 9 on the third part 62c. The third part 62c can be lifted upwards to remove it. The operation is convenient.

[0070] In this embodiment, the upper shell 3 forms the first water outlet structure, and the lower shell 4 constrains the first receiving groove 611. The water supply pipe 7 has a relatively independent first branch pipe 71 and a second branch pipe 72. The first branch pipe 71 is used to transport water to the spray arm in the middle of the tank, and the second branch pipe 72 is used to transport water to the spray arm at the top of the tank. The spray arm in the middle of the tank and the spray arm at the top of the tank together constitute the second water outlet structure b, so as to realize the lower, middle and top layer spraying, which is beneficial to improving the cleaning effect.

[0071] In use, the output shaft 51 of the drive unit 5 rotates, driving the upper impeller 1 and the lower impeller 2 to rotate. The axial flow blades at the lower part of the upper impeller 1 draw water from the second receiving tank 612 of the draining area 61 through the suction nozzle 40 and the first water inlet 411 into the second receiving cavity 41 and transport it upward to the first receiving cavity 31. The water in the first receiving cavity 31 is sprayed out through the spray hole 32 under the action of the upper part of the upper impeller 1. The lower impeller 2 draws water from the second receiving tank 612 of the draining area 61 through the second water inlet 421 into the third receiving cavity 42, and transports it circumferentially along the guide pipe 423 through the water outlet 422 to the water supply pipe 7. The water supply pipe 7 transports the water upward for top and / or middle spraying. The water that falls back flows into the second receiving tank 612 after being pre-filtered by the drain plate 62, and enters the second receiving tank 612 after being filtered by the diameter of the slag collection basket 9.

[0072] like Figure 11As shown, the slag collection basket 9 is arranged near the first edge 6201 of the drain plate 62. The drain plate 62 gradually slopes downward from the first edge 6201 toward the slag collection basket 9 to form a first guide slope 100. The drain plate 62 gradually extends downward from the second edge 6202 opposite to the first edge 6201 toward the slag collection basket 9 to form a second guide slope 200, and the slope of the second guide slope 200 is less than the slope of the first guide slope 100. The second guide slope 200 includes a first inclined portion 2001 near the second edge 6202 of the drain plate 62 and a second inclined portion 2002 near the slag collection basket 9. The slope of the first inclined portion 2001 is less than the slope of the second inclined portion 2002. In this embodiment, the slag collection basket 9 is located on the third part 62c, the upper wall of the second part 62b forms a first inclined part 2001, the upper wall of the third part 62c located between the second part 62b and the slag collection basket 9 forms a second inclined part 2002, and the upper wall of the third part 62c on the side away from the second part 62b forms a first guide slope 100.

[0073] The angle α between the first inclined portion 2001 and the horizontal plane is 0.5° to 2°, preferably 1°; the angle β between the second inclined portion 2002 and the horizontal plane is 9° to 13.5°, preferably 12°. The angle γ between the first guide slope 100 and the horizontal plane is 13° to 16.5°, preferably 14.5°.

[0074] In this embodiment, the drainage area has an irregular shape. Combined with the overall water flow system's design of 60L / min, small holes are provided on the second part 62b and the third part 62c, maintaining an overall porosity of 30%. This ensures sufficient flow area and balances hydraulic forces while maximizing the hydraulic pressure at the collection basket 9, efficiently collecting contaminants from the tableware within it. The second part 62b is close to the receiving groove below the collection basket 9, while the outer side of the third part 62c is relatively far from the receiving groove below the collection basket 9. The collection basket 9 is located at the lowest point of the entire drainage area 61. During water circulation, above the drain plate 62, water carrying contaminants falls from the inner wall of the machine cavity and gathers around the drain plate 62. At the junction of the bottom of the machine and the area around the drain plate 62, when the water flows through the first inclined section 2001, the backflow inertia of the water maintains a relatively fast speed. A small portion of the water falls back into the draining area 61 through the mesh of the second section 62b. Most of the water, under the action of viscosity and the suction force of the pump mechanism a, flows from the upper surface of the second section 62b to the third section 62c. The inlet for the entire water flow is at the slag collection basket 9. The second section 62b... The section connecting to the third part 62c is set at a 12° angle. While ensuring that some water flows back into the draining area through the mesh to maintain system balance, it guides the water containing contaminants into the slag collection basket 9. On the opposite side of the 12° angle, the water flow back is more obstructed and the backflow speed is slower. Setting the angle to 14.5° can more quickly guide the water containing contaminants back into the slag collection basket 9. Extensive simulations and experiments have proven that this flow guiding structure in this embodiment greatly improves the efficiency of residue collection, which plays a crucial role in improving the cleanliness of tableware and reducing washing time.

[0075] 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.

[0076] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A cleaning machine, comprising a housing (6), wherein the bottom of the housing (6) is provided with a recessed draining area (61), the top of the draining area (61) is covered with a draining plate (62), and a slag collection basket (9) is provided on the draining plate (62), the lower part of the slag collection basket (9) being accommodated in the draining area (61), characterized in that: The slag collection basket (9) is arranged near the first edge (6201) of the drain plate (62). The drain plate (62) gradually slopes downward from the first edge (6201) toward the slag collection basket (9) to form a first guide slope (100). The drain plate (62) gradually extends downward from the second edge (6202) opposite to the first edge (6201) toward the slag collection basket (9) to form a second guide slope (200). The slope of the second guide slope (200) is less than the slope of the first guide slope (100). It also includes a water supply pipe (7) and a pumping mechanism (a) for pumping water from the drainage area (61) to above the drainage plate (62), said pumping mechanism (a) comprising: Upper impeller (1); Lower impeller (2); The upper housing (3) has a first receiving cavity (31) for mounting the upper part of the upper impeller (1), and the top wall and / or side wall of the upper housing (3) have spray holes (32) in fluid communication with the first receiving cavity (31); and The lower housing (4) is connected below the upper housing (3). The upper part of the lower housing (4) has a second accommodating cavity (41) for installing the lower part of the upper impeller (1). The second accommodating cavity (41) is connected to the first accommodating cavity. The side wall of the lower housing (4) has a first water inlet (411) for water to enter the second accommodating cavity (41). The first water inlet (411) is located in the drainage area. The lower part of the lower housing (4) has a third accommodating cavity (42) for installing the lower impeller (2). The bottom wall of the lower housing (4) has a second water inlet (421) for water to enter the third accommodating cavity (42). The side wall of the lower housing (4) has a water outlet (422) for water to be output from the third accommodating cavity (42). The water outlet (422) is connected to the water supply pipe (7). The pumping mechanism (a) constitutes an open dual-pump system, wherein the upper second accommodating chamber (41), the first accommodating chamber (31) and the upper impeller (1) provide bottom spray water supply, and the lower third accommodating chamber (42) and the lower impeller provide top and / or middle spray water supply (2).

2. The cleaning machine according to claim 1, characterized in that: The second guide slope (200) includes a first inclined portion (2001) near the second edge (6202) of the drain plate (62) and a second inclined portion (2002) near the slag collection basket (9), wherein the slope of the first inclined portion (2001) is less than the slope of the second inclined portion (2002).

3. The cleaning machine according to claim 2, characterized in that: The angle between the first inclined portion (2001) and the horizontal plane is 0.5° to 2°, and the angle between the second inclined portion (2002) and the horizontal plane is 9° to 13.5°.

4. The cleaning machine according to claim 2, characterized in that: The angle between the first guide slope (100) and the horizontal plane is 13°~16.5°.

5. The cleaning machine according to any one of claims 2 to 4, characterized in that: The lower end of the water supply pipe (7) passes through the drain plate (62) and is in fluid communication with the water pump mechanism (a), the drain plate (62) including The first part (62a), arranged close to the first edge of the drainage area (61) and positioned on the housing (6), is used to provide an assembly area for the water supply pipe (7); The second part (62b) is spliced ​​with the first part (62a) and locked to the housing (6) by a detachable connection structure; The third part (62c) is arranged with the second edge opposite to the first edge of the drainage area (61) and spliced ​​with the second part (62b). The third part (62c) is detachably constrained to the box body (6). The second part (62b) or the second part (62b) and the third part (62c) have an installation port (60) that is connected to the pumping mechanism (a).

6. The cleaning machine according to claim 5, characterized in that: The slag collection basket (9) is disposed on the third part (62c), the upper wall of the second part (62b) forms the first inclined part (2001), the upper wall of the third part (62c) located between the second part (62b) and the slag collection basket (9) forms the second inclined part (2002), and the upper wall of the third part (62c) on the side away from the second part (62b) forms the first guide slope (100).

7. The cleaning machine according to claim 5, characterized in that: The second part (62b) has a semi-circular first notch (601) at its edge, and correspondingly, the third part (62c) has a semi-circular second notch (602) at its edge. The first notch (601) and the second notch (602) fit together to form the mounting opening (60).

8. The cleaning machine according to claim 7, characterized in that: The pumping mechanism (a) has a support plate (44) arranged close to the lower edge of the mounting port (60). A first protrusion (6011) extending upward is provided at the first notch (601), and a second protrusion (6021) extending upward is provided at the second notch (602). The first protrusion (6011) and the second protrusion (6021) are engaged with each other to form an assembly ring that can surround the periphery of the support plate (44). A retaining ring (603) is provided above the drain plate (62) and is detachably fastened to the support plate (44) with its lower edge pressed against the first protrusion (601) and the second protrusion (602).

9. The cleaning machine according to claim 8, characterized in that: The second part (62b) is a plastic part, the first convex ring (6011) is integrally formed with the second part (62b), the third part (62c) is a metal part, and the second convex ring (6021) is a plastic part fused to the third part (62c).

10. The cleaning machine according to claim 8, characterized in that: The bottom of the upper housing (3) is rotatably constrained on the retaining ring (603).

11. The cleaning machine according to claim 5, characterized in that: The bottom wall of the drainage area (61) extends upward to form an assembly platform (616) arranged close to the lower wall of the first part (62a). The assembly platform (616) has a water distribution chamber (617) in fluid communication with the water pumping mechanism (a) below it. The lower end of the water supply pipe (7) passes through the first part (62a) and connects to the water distribution chamber (617), pressing the first part (62a) onto the assembly platform (616).

12. The cleaning machine according to claim 11, characterized in that: A U-shaped groove (621) is provided at the inner edge of the first part (62a), and correspondingly, a retaining edge (622) extends downward at the corresponding edge of the second part (62b) to be able to be engaged in the U-shaped groove (621).

13. The cleaning machine according to claim 12, characterized in that: The U-shaped groove (621) is formed by the recessed inner edge of the first part (62a). In the assembled state, the upper wall surface of the first part (62a) and the upper wall surface of the second part (62b) are roughly flush at the joint.

14. The cleaning machine according to claim 11, characterized in that: The assembly platform (616) has a water inlet (6161) that communicates with the water distribution chamber (617). The first part (61a) has an assembly port (623) that corresponds to the water inlet (6161). The lower end of the water supply pipe (7) has a plug-in part (70) that passes through the assembly port (623) and is sealed to the water inlet (6161). The connection between the water supply pipe (7) and the plug-in part (70) forms a boss (701) that can press against the first part (62a).

15. The cleaning machine according to claim 14, characterized in that: The inner wall of the assembly port (623) has a through slot (6231) that extends vertically. Correspondingly, the outer peripheral wall of the insertion part (70) is provided with a protruding clip (702) that can pass through the slot (6231) and engage with the lower wall surface of the first part (62a).

16. The cleaning machine according to claim 14, characterized in that: The upper wall of the assembly table (616) is provided with an assembly piece (6162) extending upward around the water inlet (6161). When the assembly is completed, the outer peripheral wall of the plug part (70) is arranged close to the inner peripheral wall of the assembly piece (6162) and a sealing ring (703) is provided between the two.

17. The cleaning machine according to claim 5, characterized in that: The second part (62b) has a U-shaped mounting groove (626) at the edge near the third part (62c), and correspondingly, the third part (62c) extends downward at the corresponding edge to form a protruding edge (627) that can be engaged in the mounting groove (626).

18. The cleaning machine according to claim 17, characterized in that: The assembly groove (626) is formed by the recessed edge of the second part (62b). In the assembled state, the upper wall of the second part (62b) and the upper wall of the third part (62c) are approximately flush at the joint.

19. The cleaning machine according to claim 17, characterized in that: The outer wall of the assembly groove (626) has a U-shaped guide port (6261) that communicates with the bottom of the assembly groove (626).

20. The cleaning machine according to claim 12, characterized in that: The third part (62c) is provided with an opening (628), the top of the slag collection basket (9) has a support edge (91) that rests on the upper edge of the opening (628), the lower part of the slag collection basket (9) is accommodated in the drainage area (61), the bottom of the box (6) has a drain outlet (613), and the bottom of the slag collection basket (9) is detachably locked at the edge of the drain outlet (613).

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