CN117257194A

CN117257194A - Cleaning machine

Info

Publication number: CN117257194A
Application number: CN202311278595.2A
Authority: CN
Inventors: 施郑赞; 韩健健
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-09-30
Filing date: 2023-09-28
Publication date: 2023-12-22
Also published as: CN116746850A; CN221401073U; CN116763222A; CN117257195A; CN116687302A; CN116712013A; CN221401078U; CN221401072U; CN116784758A; CN116712012A; CN220956175U

Abstract

The invention relates to a cleaning machine, which is characterized in that guide vanes are provided with water guide ports and openings which are arranged oppositely, wherein the water guide ports are always communicated with an upper cavity, so that the water supply amount of a lower spray arm is ensured, the opening of the opening corresponding to a second water outlet is adjustable, a consumer can manually stir a stirring piece according to the needs to drive the guide vanes to rotate, the relative position of a side plate and the second water outlet is adjusted, the opening of the second water outlet is further controlled, when the consumer places a small quantity of tableware on an upper layer, the opening of the opening can be adjusted to be small, the water supply amount of the upper spray arm is reduced, when the consumer places a large quantity of tableware on the upper layer, the opening of the opening can be adjusted to be large, the water supply amount of the upper spray arm is increased, and therefore, the upper and lower laminar flow is better adjusted according to the characteristics of the tableware of the consumer, and the cleaning effect is improved.

Description

Cleaning machine

Technical Field

The invention relates to the technical field of dish washing machines, in particular to a washing machine for washing tableware, fruits and vegetables.

Background

For a dishwasher with a large volume, at least two groups of spray arms arranged up and down are generally arranged for achieving a better washing effect. When the dishwasher works, the washing pump respectively conveys the water to each spray arm for up-and-down spraying, the water falling back after washing tableware is gathered in the water cup at the bottom of the dishwasher, and the washing pump conveys the water falling back to each spray arm again to complete one water flow cycle.

The prior application CN202211216094.7 of the applicant discloses a structure, wherein a guide vane capable of splitting water is arranged in a volute of a water pump, one path of split water is output through a first water outlet at the top of the volute, the other path of split water is output through a second water outlet at the side part of the volute, the guide vane does not move, the interference problem of two paths of water is eliminated under the splitting action of the guide vane, the energy loss of water flow is reduced, and the two paths of water can keep higher lift and larger water flow; and the whole water flow system can be operated by only one centrifugal impeller, so that the whole water flow system has a simple structure and reduces the production cost.

Above-mentioned scheme can realize two ways water supply of cleaning machine through simple structure, however, because consumer's difference of using habit, the quantity of putting of upper and lower floor's bowl frame can be different, this has just put forward different demands to upper and lower floor's spray discharge, and upper and lower floor's discharge is uncontrollable in the present dish washer, is difficult to satisfy consumer demand.

Disclosure of Invention

Aiming at the current state of the art, the invention provides the cleaning machine which can adjust the upper and lower laminar flows according to the characteristics of placing tableware by consumers so as to improve the cleaning effect.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a cleaning machine, includes box, lower spray arm and last spray arm, still includes:

the volute is arranged in the box body and positioned at the bottom of the box body, the bottom is provided with a water suction port, the top is provided with a first water outlet, and the side part is provided with a second water outlet; the lower spray arm is communicated with the first water outlet, and the upper spray arm is communicated with the second water outlet;

the guide vane is arranged in the volute and comprises a cover plate capable of dividing the inner cavity of the volute into an upper cavity and a lower cavity, the first water outlet is communicated with the upper cavity, the second water outlet is communicated with the lower cavity, a water guide port for supplying water from the lower cavity into the upper cavity is arranged at the first side edge of the guide vane, a side plate extending downwards is arranged at the second side edge of the cover plate, an open-loop structure is formed on the periphery of the cover plate, and an opening opposite to the water guide port is formed on the side plate;

the centrifugal impeller is rotatably arranged in the lower cavity and is used for sucking water into the lower cavity through the water suction port, sucking water in the lower cavity into the upper cavity through the water guide port and then drawing out through the first water outlet or directly drawing out water in the lower cavity through the second water outlet;

the top of the guide vane is provided with a poking piece for driving the guide vane to rotate, the poking piece is exposed on the top wall of the volute, and the guide vane rotates to adjust the relative position of the side plate and the second water outlet so as to control the opening of the second water outlet.

Preferably, the poking piece is arc-shaped and extends along the circumferential direction of the central part of the guide vane on the upper surface of the guide vane, and a guide gap for the poking piece to extend out and poke along the circumferential direction is formed in the top wall of the volute. The structure facilitates the manual operation of the shifting piece, thereby adjusting the opening of the second water outlet.

Preferably, a notch is partially formed at the central part of the top wall of the volute, a top plate is covered at the notch, and the guide gap is formed between the first side edge of the top plate and the inner edge of the notch. The top plate is adopted to splice the top wall of the volute, so that a guide gap is formed conveniently, and the poking plate and the guide gap are assembled conveniently.

Preferably, the second side edge of the top plate is in fit and sealing connection with the corresponding inner edge of the notch. Preferably, the volute top wall is provided with a clamping groove extending radially outwards from the notch at the second side edge of the corresponding top plate, and correspondingly, the second side edge of the top plate is provided with a clamping edge capable of being in limit fit with the clamping groove. The above structure facilitates assembling the top plate with the scroll casing.

Preferably, the upper surface of the cover plate is provided with an upwardly extending baffle, and the baffle and the top wall of the volute jointly enclose a converging flow passage which is communicated with the water guide port and used for gathering water flow which is upwardly output through the first water outlet.

Preferably, the converging flow passage is offset in a first side area of the cover plate, and the plectrum is arranged in a second area of the cover plate and is positioned outside the converging flow passage. By adopting the structure, the adjusting structure plectrum and the converging flow passage are not interfered with each other.

Preferably, the upper surface of the cover plate is provided with a step surface which can always prop against the inner top wall of the volute to seal the notch, and the poking piece is arranged on the step surface. The structure can ensure that the guide gap rotates along with the guide vane and no water leakage is found.

Preferably, the upper surface of the cover plate is provided with a reinforcing rib which abuts against the top wall of the pump shell, and the reinforcing rib is arranged corresponding to the periphery of the baffle plate.

Preferably, the first water outlet is formed in the central part of the top wall of the volute, and the baffle plate comprises an arc section arranged around the edge of the first water outlet, a first curved surface section smoothly extending from the first end of the arc section to the first edge of the water guide port, and a second curved surface section smoothly extending from the second end of the arc section to the second edge of the water guide port.

Preferably, the edge of the cover plate is close to the inner peripheral wall of the volute and is used for separating an upper cavity and a lower cavity, and the outer peripheral wall of the side plate is close to the inner peripheral wall of the lower part of the volute.

Preferably, the inner peripheral wall of the side plate is provided with guide vanes which extend spirally against the water flow direction and gradually approach the edge of the centrifugal impeller, the guide vanes are at least two groups and are arranged at intervals in the circumferential direction of the side plate, and the water guide opening is formed between two adjacent guide vanes and upwards penetrates through the cover plate.

Preferably, the first ends of the guide vanes are smoothly connected with the side plates, the second ends of the guide vanes are arranged close to the edge of the centrifugal impeller, and the distance between the inner side wall of each guide vane and the centrifugal impeller is gradually increased in a spiral shape from the second ends to the first ends.

Preferably, the guide vanes include a first guide vane, a second guide vane and a third guide vane, and the two guide vanes are respectively formed between the first guide vane and the second guide vane and between the second guide vane and the third guide vane.

Preferably, the first end of the guide vane positioned at the upstream and the second end of the guide vane positioned at the downstream are staggered to form a water guide channel communicated with the water guide port, and the water outlet end of the water guide channel is positioned at the inner side of the side plate and communicated with the inner side of the water guide port.

Compared with the prior art, the invention has the advantages that: according to the invention, the guide vanes are provided with the water guide ports and the openings which are arranged oppositely, wherein the water guide ports are always communicated with the upper cavity, so that the water supply amount of the lower spray arm is ensured, the opening of the opening corresponding to the second water outlet is adjustable, a consumer can manually stir the stirring piece according to the needs to drive the guide vanes to rotate, the relative positions of the side plates and the second water outlet are adjusted, the opening of the second water outlet is further controlled, when the consumer places tableware on the upper layer, the opening of the opening can be reduced to reduce the water supply amount of the upper spray arm, and when the consumer places tableware on the upper layer, the opening of the opening can be increased to increase the water supply amount of the upper spray arm, so that the upper and lower laminar flows are better adjusted according to the characteristics of placing tableware by the consumer, and the cleaning effect is improved.

Drawings

FIG. 1 is a schematic view of a cleaning machine according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a pump mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic view of the bottom structure of FIG. 2;

FIG. 4 is an exploded view of FIG. 2;

FIG. 5 is a schematic structural view of the vane of FIG. 4;

FIG. 6 is a schematic view of the bottom structure of FIG. 5;

FIG. 7 is a diagram of the state of cooperation of the guide vane and the volute (full open second outlet) in an embodiment of the invention;

FIG. 8 is a diagram of the state of cooperation of the guide vane and the volute (second outlet half-open) in an embodiment of the present invention;

FIG. 9 is a diagram of the fit between the guide vane and the volute (the second outlet is fully closed) in an embodiment of the invention;

fig. 10 is a partial cross-sectional view of an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 10, the cleaning machine of the present embodiment includes a tank 01, a lower shower arm 02, an upper shower arm 03, and a water pumping mechanism. The upper part of the box body 01 is provided with an upper bowl rack, the lower part is provided with a lower bowl rack, the lower spray arm 02 sprays water columns to the lower bowl rack, and the upper spray arm 03 sprays water columns to the upper bowl rack. The bottom of box 01 is provided with return water region 011, and return water region 011's top covers and is provided with filter 012, and filter 012 is provided with album sediment basket 013, and lower spray arm 02 locates on the filter 012. The water pumping mechanism is arranged in the water return area 011 and is used for pumping water in the water return area 011 into the upper spray arm and the lower spray arm.

The water pumping mechanism comprises a volute 1, a guide vane 2, a centrifugal impeller 3 and a motor 4. Wherein:

the volute 1 is arranged in a water return area at the bottom of the box body 01, a water suction port 13 is formed in the bottom of the volute 1, a first water outlet 11 is formed in the top of the volute 1, and a second water outlet 12 is formed in the side part of the volute 1; the lower spray arm 02 is communicated with the first water outlet 11, and the upper spray arm 03 is communicated with the second water outlet 12 through a pipeline 031;

the guide vane 2 is arranged in the volute 1 and comprises a cover plate 21 capable of dividing the inner cavity of the volute 1 into an upper cavity 101 and a lower cavity 102, the first water outlet 11 is communicated with the upper cavity 101, the second water outlet 12 is communicated with the lower cavity 102, a water guide port 23 for supplying water from the lower cavity 102 into the upper cavity 101 is arranged at the first side edge of the guide vane 2, a side plate 22 extending downwards is arranged at the second side edge of the cover plate 21, and an open-loop structure is formed on the periphery of the cover plate 21 by the side plate 22 and an opening 220 opposite to the water guide port 23 is formed;

the centrifugal impeller 3 is rotatably arranged in the lower cavity 102 and is used for sucking water into the lower cavity 102 through the water suction port 13, sucking water in the lower cavity 102 into the upper cavity 101 through the water guide port 23 and then drawing out through the first water outlet 11 or directly drawing out water in the lower cavity 102 through the second water outlet 12;

the motor 4 is arranged at the outer bottom of the box body 01, the power output shaft extends upwards, and the upper end of the power output shaft penetrates through the bottom wall of the box body 01 and the water suction port 13 to be connected with the centrifugal impeller 3 and is used for driving the centrifugal impeller 3 to rotate.

In this embodiment, a paddle 25 for driving the vane 2 to rotate is disposed on the top of the vane 2, the paddle 25 is exposed above the top wall of the volute 1, and the vane 2 rotates to adjust the relative position of the side plate 22 and the second water outlet 12, so as to control the opening of the second water outlet 12. The poking piece 25 is arc-shaped and extends along the circumferential direction along the central part of the guide vane 2 on the upper surface of the guide vane 2, and a guide gap 15 for the poking piece 25 to extend out and poke along the circumferential direction is formed in the top wall of the volute 1. This structure facilitates the manipulation of the dial 25 by a human hand, thereby adjusting the opening degree of the second water outlet 12.

Specifically, a notch 16 is partially missing at the center of the top wall of the volute 1, a top plate 17 is covered at the notch 16, the first water outlet 11 is formed on the top plate 17, and a guide gap 15 is formed between the first side edge of the top plate 17 and the inner edge of the notch 16. The top wall of the volute 1 is spliced by the top plate 17, so that the guide gap 15 is formed conveniently, and the poking plate 25 and the guide gap 15 are assembled conveniently.

The second side edge of the top plate 17 is attached to and sealingly connected with the corresponding inner edge of the notch 16. The top wall of the volute 1 is provided with a clamping groove 18 extending outwards from the notch 16 along the radial direction at the second side edge corresponding to the top plate 17, and correspondingly, the second side edge of the top plate 17 is provided with a clamping edge 171 which can be in limit fit with the clamping groove 18. The above structure facilitates assembling the top plate 17 with the scroll 1. A collar 19 for rotatably connecting the lower spray arm 02 to the top of the volute 1 is arranged on the top plate 17, and the edge of the top plate 17 can be further limited by the pressing of the collar 19.

The upper surface of the cover plate 21 of this embodiment is provided with an upwardly extending baffle plate 27, and the baffle plate 27 and the top wall of the volute 1 together enclose a converging flow passage 270 which is communicated with the water guiding port 23 and is used for converging the water flow which is upwardly outputted through the first water outlet 11. The structure can perform pressurized flow gathering on water output through the first water outlet 11, reduce fluid energy loss and improve water pressure and lift.

The converging flow passage 270 is offset from a first side region of the cover plate 21, and the paddle 25 is located in a second region of the cover plate 21 and outside the converging flow passage 270. With this structure, the adjustment structure dial 25 and the confluence flow passage 270 do not interfere with each other. The upper surface of the cover plate 21 is provided with a step surface 251 which can always abut against the inner top wall of the volute 1 to close the notch 16, and the dial 25 is arranged on the step surface 251. This structure ensures that the guide slit 15 rotates with the guide vane 2 without water leakage.

In this embodiment, the scroll casing 1 has a cylindrical shape, and the cover 21 has a disk shape adapted thereto. The apron 21 edge is close to spiral case 1 inner peripheral wall arrangement, is used for separating out upper cavity 101 and lower cavity 102, and the inner peripheral wall arrangement that spiral case 1 lower part was pressed close to the outer peripheral wall of curb plate 22 is connected guide vane 2 and spiral case 1 inner wall compact cooperation to improve the assembly stability, avoid causing the interference to the rivers, reduce fluid energy loss.

The inner peripheral wall of the side plate 22 of this embodiment is provided with at least two groups of guide vanes 26 which extend spirally against the water flow direction and gradually approach the edge of the centrifugal impeller 3, the guide vanes 26 are arranged at intervals in the circumferential direction of the side plate 22, and the water guide ports 23 are formed between two adjacent guide vanes 26 and penetrate the cover plate 21 upwards. The first ends of the guide vanes 26 are smoothly connected with the side plates 22, the second ends of the guide vanes 26 are arranged near the edge of the centrifugal impeller 3, and the distance between the inner side wall of each guide vane 26 and the centrifugal impeller 3 is gradually increased in a spiral shape from the second end to the first end.

The guide vanes 26 of this embodiment are three groups and are circumferentially spaced apart from each other on the side plate 22, and the water guide openings 23 are formed between two adjacent guide vanes 26, so that the structure can circumferentially pressurize and guide water flow, and a part of water flow is pressurized in the circumferential direction and then is output from the second water outlet 12, which is beneficial to improving the water pressure of the part of water flow, and another part of water flow is pressurized in the circumferential direction and then is output from the water guide openings 23, and then can be upward fed into the upper cavity 101 at a larger flow velocity, so that the water flow is upward injected at a larger water pressure.

Specifically, the guide vane 26 includes a first guide vane 261, a second guide vane 262, and a third guide vane 263, and two water guide ports 23 are respectively formed between the first guide vane 261 and the second guide vane 262, and between the second guide vane 262 and the third guide vane 263. The first end of the upstream guide vane 26 and the second end of the downstream guide vane 26 are staggered to form a water guide channel 231 communicated with the water guide port 23, and the water outlet end of the water guide channel 231 is positioned inside the side plate 22 and communicated with the inside of the water guide port 23. The above-mentioned deflector 26 has the following functions: (1) The first guide vane 261, the second guide vane 262 and the third guide vane 263 cooperate to pressurize the water flow in all the volutes 1 in the circumferential direction; (2) The second end of the first guide vane 261 is used for circumferentially splitting water, so that a part of water is output through the second water outlet 12, the other part of water continuously flows along the circumference of the centrifugal impeller 3 in the lower cavity 102, and the majority of the part of water is conveyed to the first water outlet 11 through the water guide port 23; (3) The inner peripheral wall of the second deflector 262 pressurizes the water to be outputted through the second water outlet 12; (4) Two water guide ports 23 are enclosed, and the two water guide ports 23 are arranged at intervals along the water flow direction in the circumferential direction, so that the energy loss involved in the water flow is reduced, and the water pressure of the water flow output through the first water outlet 11 is improved.

In the present embodiment, the upper surface of the cover plate 21 is provided with a reinforcing rib 28 against the pump housing top wall, the reinforcing rib 28 being disposed corresponding to the periphery of the baffle plate 27. The first water outlet 11 is formed at the central part of the top wall of the volute 1, and the baffle 27 comprises a circular arc segment 271 arranged around the edge of the first water outlet 11, a first curved surface segment 272 extending smoothly from the first end of the circular arc segment 271 to the first edge of the water guide 23, and a second curved surface segment 273 extending smoothly from the second end of the circular arc segment 271 to the second edge of the water guide 23.

The cleaning method of the embodiment comprises the following steps:

when the number of the tableware placed on the upper layer of the cleaning machine is equal to or greater than that of the tableware placed on the lower layer, the rotary pulling piece 25 drives the guide vane 2 to circumferentially rotate until the first end of the side plate 22 is aligned with the first side edge of the second water outlet 12, the second end of the side plate 22 corresponds to the inner wall of the volute 1 at the upstream of the second water outlet 12, at the moment, the opening 220 on the side plate 22 is completely communicated with the second water outlet 12, and the opening of the second water outlet 12 is in the maximum state, so that the maximum flow spraying is carried out through the lower spray arm 02 and the upper spray arm 03 respectively;

when the number of tableware placed on the upper layer of the cleaning machine is smaller than that of tableware placed on the lower layer, the rotary stirring piece 25 drives the guide vane 2 to circumferentially rotate until the first end of the side plate 22 corresponds to the inner wall of the volute 1, the second end of the side plate 22 corresponds to the middle part of the second water outlet 12, at the moment, the opening 220 on the side plate 22 is partially blocked by the inner wall of the volute 1 and is partially communicated with the second water outlet 12, and the opening of the second water outlet 12 is reduced, so that large-flow spraying is performed through the lower spray arm 02 and small-flow spraying is performed through the upper spray arm 03;

when the tableware is not placed on the upper layer of the cleaning machine, but only when the tableware is placed on the lower layer, the rotary pulling piece 25 drives the guide vane 2 to circumferentially rotate until the first end of the side plate 22 corresponds to the inner wall of the volute 1, the second end of the side plate 22 is aligned with the first side edge of the second water outlet 12, at the moment, the opening 220 on the side plate 22 is completely blocked by the inner wall of the volute 1, and the second water outlet 12 is completely blocked by the side plate 22 and is in a closed state, so that the lower-layer tableware is sprayed and cleaned only through the lower spray arm 02.

According to the embodiment, the guide vane 2 is provided with the water guide ports 23 and the openings 220 which are oppositely arranged, wherein the water guide ports 23 are always communicated with the upper cavity 101, so that the water supply amount of the lower spray arm 02 is ensured, the opening of the openings 220 corresponding to the second water outlet 12 is adjustable, the rotary stirring plate 25 drives the guide vane 2 to rotate, the relative positions of the side plates 22 and the second water outlet 12 can be adjusted, the opening of the openings 220 is further controlled to be smaller, the water supply amount of the upper spray arm is reduced when a consumer places a small number of tableware on the upper layer, and the opening of the openings 220 is larger, so that the water supply amount of the upper spray arm is increased, and therefore, the upper and lower laminar flow is better adjusted according to the characteristics of placing tableware of the consumer, and the cleaning effect is improved.

In the description and claims of the present invention, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the invention may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.

Claims

1. The utility model provides a cleaning machine, includes box (01), lower spray arm (02) and last spray arm (03), its characterized in that still includes:

the volute (1) is arranged in the box body (01) and is positioned at the bottom of the box body (01), the bottom is provided with a water suction port (13), the top is provided with a first water outlet (11), and the side is provided with a second water outlet (12); the lower spray arm (02) is communicated with the first water outlet (11), and the upper spray arm (03) is communicated with the second water outlet (12);

the guide vane (2) is arranged in the volute (1) and comprises a cover plate (21) capable of dividing the inner cavity of the volute (1) into an upper cavity (101) and a lower cavity (102), the first water outlet (11) is communicated with the upper cavity (101), the second water outlet (12) is communicated with the lower cavity (102), the first side edge of the guide vane (2) is provided with a water guide port (23) for supplying water from the lower cavity (102) into the upper cavity (101), the second side edge of the cover plate is provided with a side plate extending downwards, and the side plate forms an open-loop structure in the circumferential direction of the cover plate (21) and forms an opening opposite to the water guide port;

the centrifugal impeller (3) is rotatably arranged in the lower cavity (102) and is used for sucking water into the lower cavity (102) through the water suction port (13), sucking the water in the lower cavity (102) into the upper cavity (101) through the water guide port (23) and then drawing the water out through the first water outlet (11) or directly drawing the water in the lower cavity (102) out through the second water outlet (12);

the top of the guide vane (2) is provided with a poking piece (25) for driving the guide vane (2) to rotate, the poking piece (25) is exposed out of the top wall of the volute (1), and the guide vane (2) rotates to adjust the relative position of the side plate (22) and the second water outlet (12) so as to control the opening degree of the second water outlet (12).

2. The cleaning machine of claim 1, wherein: the poking sheets (25) are arc-shaped and extend along the circumferential direction along the central part of the guide vane on the upper surface of the guide vane (2), and a guide gap (15) for the poking sheets (25) to stretch out and poke along the circumferential direction is formed in the top wall of the volute (1).

3. The cleaning machine of claim 2, wherein: a notch (16) is formed by partial deletion of the central part of the top wall of the volute (1), a top plate (17) is covered at the notch (16), the first water outlet (11) is formed in the top plate (17), and a guide gap (15) is formed between the first side edge of the top plate (17) and the inner edge of the notch (16).

4. A cleaning machine as claimed in claim 3, wherein: the second side edge of the top plate (17) is attached to and in sealing connection with the corresponding inner edge of the notch (16).

5. A cleaning machine as claimed in claim 3, wherein: the top wall of the volute (1) is provided with clamping grooves (18) extending outwards along the radial direction from the notch (16) at the second side edge of the corresponding top plate (17), and correspondingly, the second side edge of the top plate (17) is provided with clamping edges (171) which can be in limit fit with the clamping grooves (18).

6. A cleaning machine as claimed in claim 3, wherein: the upper surface of apron (21) is provided with upwards extending baffle (27), and this baffle (27) and spiral case (1) roof enclose jointly and are linked together with water guiding mouth (23), are used for carrying out the confluence runner (270) that gathers to the rivers that export upwards through first delivery port (11).

7. The cleaning machine of claim 6, wherein: the converging flow passage (270) is offset in a first side area of the cover plate (21), and the poking piece (25) is arranged in a second area of the cover plate (21) and is positioned outside the converging flow passage (270).

8. The cleaning machine of claim 6, wherein: the upper surface of the cover plate (21) is provided with a step surface (251) which can always prop against the inner top wall of the volute (1) so as to seal the notch (16), and the poking piece (25) is arranged on the step surface (251).

9. The cleaning machine of claim 6, wherein: the upper surface of the cover plate (21) is provided with a reinforcing rib (28) which is propped against the top wall of the pump shell, and the reinforcing rib (28) is arranged corresponding to the periphery of the baffle plate (27).

10. The cleaning machine of claim 6, wherein: the first water outlet (11) is arranged at the central part of the top wall of the volute (1), and the baffle (27) comprises an arc section (271) which is arranged around the edge of the first water outlet (11), a first curved surface section (272) which smoothly extends from the first end of the arc section (271) to the first edge of the water guide opening (23), and a second curved surface section (273) which smoothly extends from the second end of the arc section (271) to the second edge of the water guide opening (23).

11. The cleaning machine of any one of claims 1-10, wherein: the edge of the cover plate (21) is close to the inner peripheral wall of the volute (1) and is used for separating an upper cavity (101) and a lower cavity (102), and the outer peripheral wall of the side plate (22) is close to the inner peripheral wall of the lower part of the volute (1).

12. The cleaning machine of claim 11, wherein: the inner peripheral wall of the side plate (22) is provided with guide vanes (26) which spirally extend against the water flow direction and gradually approach the edge of the centrifugal impeller (3), the guide vanes (26) are at least two groups and are circumferentially arranged at intervals on the side plate (22), and the water guide ports (23) are formed between two adjacent guide vanes (26) and upwards penetrate through the cover plate (21).

13. The cleaning machine of claim 12, wherein: the first ends of the guide vanes (26) are smoothly connected with the side plates (22), the second ends of the guide vanes (26) are arranged close to the edge of the centrifugal impeller (3), and the distance between the inner side walls of the guide vanes (26) and the centrifugal impeller (3) is gradually increased in a spiral shape from the second ends to the first ends.

14. The cleaning machine of claim 12, wherein: the guide vanes (26) comprise a first guide vane (261), a second guide vane (262) and a third guide vane (263), and two water guide ports (23) are respectively formed between the first guide vane (261) and the second guide vane (262) and between the second guide vane (262) and the third guide vane (263).

15. The cleaning machine of claim 12, wherein: the first end of the guide vane (26) positioned at the upstream and the second end of the guide vane (26) positioned at the downstream are mutually staggered to form a water guide channel (231) communicated with the water guide opening (23), and the water outlet end of the water guide channel (231) is positioned at the inner side of the side plate (22) and communicated with the inner side of the water guide opening (23).