CN116687302A

CN116687302A - Cleaning machine and cleaning method

Info

Publication number: CN116687302A
Application number: CN202310797660.6A
Authority: CN
Inventors: 姚永磊; 刁硕
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-09-30
Filing date: 2023-06-30
Publication date: 2023-09-05
Also published as: CN117257194A; CN117257195A; CN116784758A; CN116763222A; CN116712012A; CN116712013A; CN220956175U; CN116746850A

Abstract

The application relates to a cleaning machine and a cleaning method, wherein a first cavity and a water return area are integrally formed, a slow flow area in the water return process is provided, the stability of the flow speed of the water return is improved, a heating piece covered at the bottom of the first cavity forms a part of the bottom wall of a box body, the bottom structure of the box body is simplified, the bottom of the box body is leveled, the problem of residue accumulation is eliminated, meanwhile, the heating piece heats the water return flowing through the first cavity in real time, and the heating efficiency is high; after the cleaning is finished, the heating piece heats the residual water with little bottom in the backwater area, the residual water is changed into steam to be sprayed from bottom to top through the bottom spray arm and sprayed from top to bottom through the pipeline and the top spray arm, so that the residual water in the bottom spray arm, the bottom of the backwater area, the pipeline and the top spray arm is eliminated, the whole cavity is truly realized, no residual water exists, and the air flow collides up and down in the washing cavity, thereby being beneficial to improving the drying effect.

Description

Cleaning machine and cleaning method

Technical Field

The application relates to the technical field of dish washing machines, in particular to a washing machine and a washing method 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 inventor (water flow system for cleaning machine and cleaning machine) discloses a structure, wherein a guide vane capable of splitting water is arranged in a pump shell of a water pump, one path of split water is output through a first water outlet at the top of the pump shell, the other path of split water is output through a second water outlet at the side part of the pump shell, the guide vane does not move, the interference problem of two paths of water is eliminated under the split 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. However, because the pump shell is fixed at the bottom of the box body through screws, the height difference exists at each connecting structure, so that after the cleaning is finished, certain residual water at the bottom of the box body cannot be discharged, bacteria are easy to breed after long-time storage, and secondary pollution is caused.

Therefore, further improvements are needed for the above-described washer structure.

Disclosure of Invention

The first technical problem to be solved by the application is to provide a cleaning machine which is convenient for discharging residual water and carrying out local drying treatment so as to realize no residual water at the bottom of a box body and avoid bacteria breeding aiming at the current state of the art.

The second technical problem to be solved by the application is to provide a cleaning method of the cleaning machine aiming at the current state of the art.

The application solves at least one of the technical problems by adopting the following technical proposal:

the cleaning machine comprises a box body and a water pumping mechanism, wherein a concave water return area is arranged at the bottom of the box body, a filter plate is covered at the top of the water return area, the water pumping mechanism is used for pumping water in the water return area onto the filter plate, a first cavity with an open bottom and upwards arched is formed at the bottom of the water return area, a second cavity for installing a water drawing component of the water pumping mechanism is formed above the first cavity, the bottom edge of the first cavity is communicated with the water return area through a water return port, and the second cavity is respectively communicated with the first cavity and the upper part of the filter plate; the bottom opening of the first cavity is provided with a heating element.

Preferably, the pumping mechanism comprises a driving part and the water drawing assembly, the second cavity forms a pump shell for installing the water drawing assembly, the driving part is arranged below the heating part, and the power output shaft penetrates through the heating part and stretches into the inner cavity of the pump shell to be connected with the water drawing assembly. The second cavity and the water return area at the bottom of the box body are integrally formed, the sealing performance and the stability are good, the water drawing assembly is arranged in the second cavity to form the open water pump which is directly communicated with the washing cavity, the water return path is short, the water absorption stability is good, the energy loss of fluid is reduced, the jet lift and the water pressure are improved, and the cleaning effect is further improved.

Preferably, the heating element is a thick film heating plate, the thick film heating plate covers the bottom opening of the first cavity through a sealing element, and the thick film heating plate forms the bottom wall of the first cavity. Adopt thick film formula hot plate to cover in the bottom of first cavity, not only do benefit to the part diapire that thick film formula hot plate constituted the box, eliminated the unevenness that causes at bottom half direct mount heating piece, the easy residue problem that accumulates, thick film formula hot plate covers the diapire of first cavity completely moreover, first cavity is as the first direct transition chamber of return water, be favorable to improving the heating efficiency of washing water, simultaneously, can also diffuse the air after the heating to dish washer everywhere with even temperature and velocity of flow through this transition chamber after the washing finishes, improve drying effect, realize the effect of thoroughly no surplus water everywhere in the return water region.

Preferably, the bottom of return water region is opened there is the outlet that is located the heating member side, and this outlet department is provided with the top and exposes in the collection sediment basket of filter, return water mouth be located between heating member and the outlet, just return water mouth's diapire at least part from the upper surface of thick film formula hot plate to outlet department gradually reduce. Because in return water in-process, most return water gets into in the first cavity through album sediment basket lateral part, return water mouth, adopts above-mentioned structure, is favorable to reducing fluid energy loss, and avoids the residue to accumulate in the return water regional diapire department between album sediment basket and the first cavity, eliminates secondary pollution problem.

Preferably, the bottom of the pump shell is provided with a water suction port communicated with the first cavity, the top of the pump shell is provided with a first water outlet, the side part of the pump shell is provided with a second water outlet, the bottom of the box body is provided with a bottom spray arm which is positioned above the filter plate and communicated with the first water outlet, and the middle upper part of the box body is provided with a top spray arm communicated with the second water outlet through a pipeline. According to the application, the bottom spray arm sprays water columns upwards to mainly clean tableware in the washing cavity, and the top spray arm cleans tableware, particularly the back of tableware, which is positioned at the upper part of the washing cavity from top to bottom, so that the dead cleaning angle is eliminated, and the cleaning effect is improved.

Preferably, the water drawing assembly comprises a guide vane and a centrifugal impeller, the guide vane is arranged in the pump shell and comprises a cover plate capable of dividing the inner cavity of the pump shell 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 diversion opening is arranged below the cover plate, and a water guide opening which is communicated with the water diversion opening and is used for enabling water to flow from the lower cavity into the upper cavity is formed in the edge of the cover 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. According to the application, the guide vane capable of splitting water is arranged in the pump shell, one path of split water is output through the first water outlet at the top of the pump shell, the other path of split water is output through the second water outlet at the side part of the pump shell, the guide vane does not move, the interference problem of two paths of water is eliminated under the split 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; the running of the water flow system can be finished by only one centrifugal impeller, the whole structure is simple, and the production cost is reduced; in addition, the application keeps adopting an open water flow system, which is convenient for disassembly and assembly and cleaning of the water flow system.

Preferably, the lower surface of the cover plate is provided with a plurality of guide plates, the guide plates are distributed at intervals in the circumferential direction of the cover plate and extend spirally inwards from the edge of the cover plate against the water flow direction, a water diversion channel is restrained between two adjacent guide plates, at least partial missing of the cover plate part corresponding to the top of the guide plates forms the water guide port communicated with the outlet of the water diversion channel, and the outlet of the water diversion channel forms the water diversion port. The guide vane has the following functions: (1) The water flow in all pump shells is pressurized in the circumferential direction by the water flow in the pump shells; (2) The two adjacent guide vanes are used for circumferentially splitting water, so that one part of water is output through the second water outlet, the other part of water continuously flows along the circumference of the centrifugal impeller in the lower cavity, and most of the water is conveyed to the first water outlet through the water guide opening.

Preferably, the cover plate is disc-shaped, the projection of the outer ends of the guide vanes on the horizontal plane is positioned at the edge of the disc-shaped cover plate, and each guide vane circumferentially surrounds an enclosed cavity for pressurizing and circumferentially dividing water flow under the cover plate. The structure can squeeze the fluid to be split, and reduce the energy loss caused by different flow directions of two flows in the splitting process.

Preferably, in the assembled state, the edge of the cover plate is arranged close to the inner peripheral wall of the pump shell, and the outer ends of the guide vanes are arranged close to the inner wall of the pump shell.

Preferably, in the two adjacent guide vanes, the outer end part of the first guide vane and the inner end arrangement part of the second guide vane are staggered to enclose the water diversion flow passage, and the cover plate is in a range from the outer end of the corresponding first guide vane to the outer end of the second guide vane to form the water diversion port. The number of water guide ports on the cover plate can be set according to the requirement, and the number of the water guide ports is smaller than the number of the water diversion channels so as to control flow distribution of the first water outlet and the second water outlet.

Preferably, the upper surface of the cover plate is provided with a converging blade which extends from the edge to the middle in a spiral manner and is used for converging the water conveyed by the water guide port to the position above the central part of the water guide port. The structure can rectify and concentrate the water conveyed upwards so as to reduce energy loss and improve water pressure.

Preferably, the central part of the upper surface of the cover plate is provided with a guide cone which gradually extends upwards from outside to inside, the plurality of converging blades are circumferentially distributed at intervals on the cover plate, and the inner ends of the converging blades are connected with the outer edge of the guide cone. The structure can further rectify and concentrate the upward water to reduce energy loss and improve water pressure.

Preferably, the second water outlet is tangentially connected with the inner wall of the pump shell, and centrifugal blades of the centrifugal impeller extend from the center to the edge in an inclined manner along the water diversion direction of the second water outlet in the pump shell. The structure can reduce the energy loss at the second water outlet.

In order to be convenient for connect, the import of top spray arm be located its top or lateral part, the orifice of top spray arm is arranged downwards, the bottom of pipeline transversely arranges and the entry end is linked together with the second delivery port, the middle part of pipeline vertically extends, the upper portion of pipeline transversely arranges and the exit end is linked together with top spray arm.

Preferably, the tank body is a water tank with a top opening, an upturned door body is arranged at the opening of the top of the water tank, the top spray arm is arranged at the inner surface of the door body, the inlet end of the top spray arm is positioned at the top of the top spray arm, and at least part of the upper part of the pipeline is positioned in the door body so as to be connected with the inlet end of the top spray arm.

Preferably, the parts forming the first cavity and the second cavity are integrally formed in the water return area, the top of the second cavity is provided with a top opening, a top sealing cover is arranged at the top opening, and the first water outlet is formed in the top sealing cover. The structure is convenient for production and manufacture, improves the convenience, stability and sealing performance of assembly of each structure, avoids air bubble suction, reduces fluid energy loss and the like.

A cleaning method comprises the following steps:

(1) The water is fed into the box body, the water pumping mechanism operates, the water in the water return area is pumped into the bottom spray arm and the top spray arm, the water is sprayed upwards through the bottom spray arm and the water is sprayed downwards through the top spray arm, the to-be-cleaned object in the box body is washed, and after the washing is finished, the water pumping mechanism stops operating and drains water;

the cleaning process is carried out for at least 2 times, and the heating piece heats the washing water in at least one cleaning process;

(2) After the cleaning is finished, the residual water in the bottom spray arm flows to the water outlet through the second cavity, the first cavity, the heating piece and the water return port under the action of gravity, and part of the residual water in the top spray arm falls down through the spray holes of the top spray arm, is partially adhered to or stays in the flow channel of the top spray arm, and the residual water in the pipeline for supplying water to the top spray arm falls back into the second cavity under the action of gravity and flows to the water outlet through the first cavity, the heating piece and the water return port;

(3) The operation pump water mechanism, draw water subassembly and produce the circulating wind that wind pressure is big and windage is little, this circulating wind is with the air in the box through return water mouth, heating member, first cavity suction second cavity in, from the second cavity through the bottom spray arm of first delivery port transport realization from bottom to top blow, dry the tableware in the dry bottom spray arm, through the second delivery port, the pipeline is gone to top spray arm, in this process, the air preheated by heating member residual temperature dries the pipeline, and blow the surplus water in the top spray arm to the box through its orifice, discharge through the outlet.

Compared with the prior art, the application has the advantages that: according to the application, the first cavity and the backwater area are integrally formed, a slow flow area in the backwater process is provided, the stability of the backwater flow speed is improved, the heating element covered at the bottom of the first cavity forms a part of the bottom wall of the box body, the bottom structure of the box body is simplified, the bottom of the box body is leveled, the problem of residue accumulation is eliminated, meanwhile, the heating element heats backwater flowing through the first cavity in real time, and the heating efficiency is high; after the cleaning is finished, the heating piece heats the residual water with little bottom in the backwater area, the residual water is changed into steam to be sprayed from bottom to top through the bottom spray arm and sprayed from top to bottom through the pipeline and the top spray arm, so that the residual water in the bottom spray arm, the bottom of the backwater area, the pipeline and the top spray arm is eliminated, the whole cavity is truly realized, no residual water exists, and the air flow collides up and down in the washing cavity, thereby being beneficial to improving the drying effect.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present application;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is another cross-sectional view of FIG. 1;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is a schematic view showing the structure of the outer bottom of the case according to the embodiment of the present application;

FIG. 6 is a schematic view of the structure of the inner bottom of the case according to the embodiment of the present application;

FIG. 7 is a schematic view of a vane structure in an embodiment of the present application;

FIG. 8 is a schematic view of a bottom structure of a vane in an embodiment of the application.

Detailed Description

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

As shown in fig. 1 to 8, the cleaning machine of the present embodiment includes a tank 4 and a water pumping mechanism 5, wherein a concave water return area 41 is provided at the bottom of the tank 4, the top of the water return area 41 is covered with a filter plate 42, the water pumping mechanism 5 is used for pumping water of the water return area 41 onto the filter plate 42, a first cavity 401 with an upward arch and an open bottom 411 is formed at the bottom of the water return area 41, a second cavity 402 for installing a water drawing component 51 of the water pumping mechanism 5 is formed on the first cavity 401, the bottom edge of the first cavity 401 is communicated with the water return area 41 through a water return port 412, and the second cavity 402 is respectively communicated with the first cavity 401 and the upper part of the filter plate 42; the heating element 6 is provided at the bottom opening 411 of the first cavity 401.

The pumping mechanism 5 comprises a driving part 51 and a water drawing component 52, the second cavity 402 forms a pump shell 1 for installing the water drawing component 52, the driving part 51 is a motor, and the power output shaft 511 is arranged below the heating part 6 and penetrates through the heating part 6 to extend into the inner cavity of the pump shell 1 to be connected with the water drawing component 52. The second cavity 402 of this embodiment and the backwater area 41 integrated into one piece in the bottom of the box 4, leakproofness and stability are good, locate this second cavity 402 with drawing water subassembly 52, constitute the open water pump with the direct intercommunication of washing chamber, the backwater route is short, and water absorption stability is good, is favorable to reducing fluid energy loss, improves injection lift and water pressure, and then improves the cleaning performance.

The heating element 6 is a thick film heating plate, which is covered at the bottom opening 411 of the first cavity 401 by the sealing element 7, and forms the bottom wall of the first cavity 401. Adopt thick film type hot plate to cover in the bottom of first cavity 401, not only do benefit to thick film type hot plate and constitute the partial diapire of box 4, eliminated the unevenness that causes at box 4 bottom direct mount heating piece, the easy residue problem that accumulates, thick film type hot plate covers the diapire of first cavity 401 completely moreover, first cavity 401 is as the first direct transition chamber of return water, be favorable to improving the heating efficiency of washing water, simultaneously, can also diffuse the air after heating to dish washer everywhere with even temperature and velocity of flow through this transition chamber after the washing finishes, improve drying effect, realize the effect of thoroughly no surplus water everywhere in the return water region 41.

The bottom of the water return area 41 is provided with a water outlet 43 positioned beside the heating element 6, the water outlet 43 is provided with a slag collecting basket 8 with the top exposed out of the filter plate 42, the water return opening 412 is positioned between the heating element 6 and the water outlet 43, and at least part of the bottom wall of the water return opening 412 gradually decreases from the upper surface of the thick film heating plate to the water outlet 43. Because in the return water process, most return water enters the first cavity 401 through the side part of the slag collecting basket 8 and the return water port, the structure is adopted, the fluid energy loss is reduced, the accumulation of residues at the bottom wall of the return water area 41 between the slag collecting basket 8 and the first cavity 401 is avoided, and the problem of secondary pollution is solved.

The bottom of the pump shell 1 is provided with a water suction port 13 communicated with the first cavity 401, the top of the pump shell 1 is provided with a first water outlet 11, the side part of the pump shell 1 is provided with a second water outlet 12, the bottom of the box 4 is provided with a bottom spray arm a which is positioned above the filter plate 42 and communicated with the first water outlet 12, and the middle upper part of the box 4 is provided with a top spray arm b which is communicated with the second water outlet 12 through a pipeline 9. In the embodiment, the bottom spray arm a sprays water columns upwards to mainly clean tableware in the washing cavity, and the top spray arm b cleans tableware, particularly the back of the tableware, which is positioned at the upper part of the washing cavity from top to bottom, so that the dead cleaning angle is eliminated, and the cleaning effect is improved.

The water drawing assembly 52 comprises a guide vane 2 and a centrifugal impeller 3, the guide vane 2 is arranged in the pump shell 1 and comprises a cover plate 21 capable of dividing the inner cavity of the pump shell 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 diversion opening 201 is arranged below the cover plate 21, and a water guide opening 23 which is communicated with the water diversion opening 201 and is used for enabling water to flow from the lower cavity 102 into the upper cavity 101 is arranged at the edge of the cover plate 21; the centrifugal impeller 3 is rotatably disposed 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. In the embodiment, the guide vane 2 capable of splitting water is arranged in the pump shell 1, one path of split water is output through the first water outlet 11 at the top of the pump shell 1, the other path of split water is output through the second water outlet 12 at the side part of the pump shell 1, the guide vane 2 does not move, the interference problem of two paths of water is eliminated under the split action of the guide vane 2, the energy loss of water flow is reduced, and the two paths of water can keep higher lift and larger water flow; the running of the water flow system can be completed by only one centrifugal impeller 3, so that the whole structure is simple, and the production cost is reduced; in addition, the embodiment keeps adopting an open water flow system, so that the disassembly and the assembly as well as the cleaning of the water flow system are convenient.

The lower surface of the cover plate 21 is provided with a plurality of guide vanes 22, the guide vanes 22 are distributed at intervals in the circumferential direction of the cover plate 21 and extend spirally inwards against the water flow direction from the edge of the cover plate 21, a water diversion channel 24 is restrained between two adjacent guide vanes 22, a part of the cover plate 21 corresponding to the top of the guide vane 22 is at least partially missing to form a water diversion port 23 communicated with the outlet of the water diversion channel 24, and the outlet of the water diversion channel 24 forms the water diversion port 201. The above-described baffle 22 has the following functions: (1) Cooperates with the cover plate 21 to form an enclosed cavity which pressurizes the water flow in all pump housings 1 in the circumferential direction; (2) The two adjacent guide vanes 22 are 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, and most of the water is conveyed to the first water outlet 11 through the water guide opening 23.

The cover plate 21 is disc-shaped, the projection of the outer ends of the guide vanes 22 on the horizontal plane is positioned at the edge of the disc-shaped cover plate 21, and each guide vane 22 circumferentially surrounds the cover plate 21 to form an enclosed cavity 100 for pressurizing and circumferentially dividing the water flow under the cover plate 21. The structure can squeeze the fluid to be split, and reduce the energy loss caused by different flow directions of two flows in the splitting process.

In the assembled state, the edge of the cover plate 21 is arranged close to the inner peripheral wall of the pump casing 1, and the outer ends of the guide vanes 22 are arranged close to the inner wall of the pump casing 1.

In the two adjacent guide vanes 22, the outer end part of the first guide vane 22 and the inner end arrangement part of the second guide vane 22 are staggered so as to enclose the water diversion flow passage 24, and the cover plate 21 is in a range from the outer end of the corresponding first guide vane 22 to the outer end of the second guide vane 22 to form the water diversion port 23. The number of water guide openings 23 on the cover plate 21 can be set according to the requirement, and the number of the water guide openings 23 is smaller than the number of the water diversion channels 24 so as to control the flow distribution of the first water outlet 11 and the second water outlet 12.

The upper surface of the cover plate 21 is provided with a converging blade 25 extending spirally from the edge to the middle for converging the water fed through the water guide port 23 to the upper side of the central portion thereof. The structure can rectify and concentrate the water conveyed upwards so as to reduce energy loss and improve water pressure. The central part of the upper surface of the cover plate 21 is provided with a plurality of flow guide cones 26 which gradually extend upwards from outside to inside, the converging blades 25 are distributed at intervals in the circumferential direction of the cover plate 21, and the inner ends of the converging blades 25 are connected with the outer edges of the flow guide cones 26. The structure can further rectify and concentrate the upward water to reduce energy loss and improve water pressure.

The second water outlet 12 of the embodiment is tangentially connected with the inner wall of the pump casing 1, and the centrifugal blades of the centrifugal impeller 3 extend from the center to the edge in an inclined manner along the water diversion direction of the second water outlet 12 in the pump casing 1. This configuration reduces energy loss at the second water outlet 12.

For the convenience of connection, the inlet of the top spray arm b is positioned at the top or the side part of the top spray arm b, the spray hole of the top spray arm b is downwards arranged, the bottom of the pipeline 9 is transversely arranged, the inlet end is communicated with the second water outlet 12, the middle part of the pipeline 9 is vertically extended, the upper part of the pipeline 9 is transversely arranged, and the outlet end is communicated with the top spray arm b.

The tank body 4 of this embodiment is a water tank with a top opening, the opening of the top of the water tank is provided with an upturned door body 10, the top spray arm b is arranged at the inner surface of the door body 10, the inlet end of the top spray arm b is positioned at the top of the top spray arm b, and at least part of the upper part of the pipeline 9 is positioned in the door body 10 so as to be connected with the inlet end of the top spray arm b.

In this embodiment, the parts forming the first cavity 401 and the second cavity 402 are integrally formed in the water return area 41, the top of the second cavity 402 is provided with a top opening, a top sealing cover 44 is installed at the top opening, and the first water outlet 11 is opened on the top sealing cover 44. The structure is convenient for production and manufacture, improves the convenience, stability and sealing performance of assembly of each structure, avoids air bubble suction, reduces fluid energy loss and the like.

The cleaning method of the embodiment comprises the following steps:

(1) The water is fed into the box body 4, the water pumping mechanism 5 operates, the water in the water return area 41 is pumped into the bottom spray arm a and the top spray arm b, the water is sprayed upwards through the bottom spray arm a and the top spray arm b is sprayed downwards, the to-be-cleaned object in the box body 4 is washed, and after the washing is finished, the water pumping mechanism 5 stops operating and drains water;

the cleaning process is carried out for at least 2 times, and the heating piece 6 heats the washing water in at least one cleaning process;

(2) After cleaning, the residual water in the bottom spray arm a flows to the water outlet 43 through the second cavity 401, the first cavity 401, the heating element 6 and the water return port 412 under the action of gravity, the residual water in the top spray arm b falls down through the spray holes of the top spray arm b, is partially adhered to or stays in the flow channel 9 of the top spray arm b, and the residual water in the pipeline 9 for supplying water to the top spray arm b falls back into the second cavity 402 under the action of gravity and flows to the water outlet 43 through the first cavity 401, the heating element 6 and the water return port 412;

(3) The water pumping mechanism 5 is operated, the water drawing assembly 52 generates circulating air with high wind pressure and low wind resistance, the circulating air sucks air in the box 4 into the second cavity 402 through the water return port 412, the heating element 6 and the first cavity 401, then the air is conveyed to the bottom spray arm a from the second cavity 402 through the first water outlet 11 to realize bottom-up blowing, tableware is dried while the bottom spray arm a is dried, the air or steam heated by the heating element 6 or preheated by residual heat is conveyed to the top spray arm b through the second water outlet 12 and the pipeline 9 in the process, residual water in the top spray arm b is blown into the box 4 through the spray holes of the air or steam, the residual water is discharged through the water outlet 43, and moisture dried in the washing cavity is discharged from the air outlet 45 on the side wall of the box 4.

In this embodiment, the first cavity 401 and the water return area 41 are integrally formed, which provides a slow flow area in the water return process, is favorable for improving the stability of the flow speed of the water return, and the heating element 6 covered at the bottom of the first cavity 401 forms a part of the bottom wall of the box 4, so that the bottom structure of the box 4 is simplified, the bottom of the box 4 is leveled, the problem of residue accumulation is eliminated, and meanwhile, the heating element 6 heats the water return flowing through the first cavity 401 in real time, so that the heating efficiency is high; after the cleaning is finished, the heating element 6 heats the residual water at the bottom of the backwater area 41, the residual water is changed into steam to be sprayed from bottom to top through the bottom spray arm a and sprayed from top to bottom through the pipeline 9 and the top spray arm b, so that the residual water in the bottom spray arm a, the bottom of the backwater area 41, the pipeline 9 and the top spray arm b is eliminated, the situation that the whole cavity has no residual water is truly realized, and the air flow collides up and down in the washing cavity, thereby being beneficial to improving the drying effect.

In the description and claims of the present application, 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 application, 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 application 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 (4) and pump water mechanism (5), box (4) bottom is provided with return water region (41) of indent, and the top of this return water region (41) is covered with filter (42), pump water mechanism (5) are used for on the water pump to filter (42) of return water region (41), its characterized in that: the bottom of the water return area (41) is provided with a first cavity (401) which is arched upwards and provided with a bottom opening (411), a second cavity (402) for installing a water drawing assembly (52) of the water pumping mechanism (5) is formed above the first cavity (401), the bottom edge of the first cavity (401) is communicated with the water return area (41) through a water return port (412), and the second cavity (402) is respectively communicated with the first cavity (401) and the filter plate (42); a heating element (6) is arranged at the bottom opening (411) of the first cavity (401).

2. The cleaning machine of claim 1, wherein: the water pumping mechanism (5) comprises a driving part (51) and the water drawing assembly (52), the second cavity (402) forms a pump shell (1) for installing the water drawing assembly (52), the driving part (51) is arranged below the heating part (6), and the power output shaft penetrates through the heating part (6) and stretches into the inner cavity of the pump shell (1) to be connected with the water drawing assembly (52).

3. The cleaning machine of claim 2, wherein: the heating element (6) is a thick film type heating plate, the thick film type heating plate is covered at the bottom opening (411) of the first cavity (401) through a sealing element, and the thick film type heating plate forms the bottom wall of the first cavity (401).

4. A cleaning machine as claimed in claim 3, wherein: the bottom of return water region (41) is opened there is outlet (43) that are located heating piece (6) side, and this outlet (43) department is provided with the top and exposes in collection sediment basket (8) of filter (42), return water mouth (412) be located between heating piece (6) and outlet (43), just at least part of the diapire of return water mouth (412) is from the upper surface of thick film hot plate to outlet (43) department gradually reduce.

5. The cleaning machine of claim 2, wherein: the novel water pump is characterized in that a water suction port (13) communicated with the first cavity (401) is formed in the bottom of the pump shell (1), a first water outlet (11) is formed in the top of the pump shell, a second water outlet (12) is formed in the side portion of the pump shell (1), a bottom spray arm (a) which is located on the filter plate (42) and communicated with the first water outlet (11) is arranged at the bottom of the box body (4), and a top spray arm (b) which is communicated with the second water outlet (12) through a pipeline (9) is arranged at the upper middle portion of the box body (4).

6. The cleaning machine of claim 5, wherein: the water drawing assembly (52) comprises guide vanes (2) and a centrifugal impeller (3), the guide vanes (2) are arranged in the pump shell (1) and comprise cover plates (21) capable of dividing the inner cavity of the pump shell (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 diversion opening (201) is arranged below the cover plates (21), and water guide openings (23) which are communicated with the water diversion opening (201) and allow water to flow into the upper cavity (101) from the lower cavity (102) are formed in the edges of the cover plates (21); 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 water out through the first water outlet (11) or directly drawing water in the lower cavity (102) out through the second water outlet (12).

7. The cleaning machine of claim 6, wherein: the lower surface of apron (21) is provided with a plurality of guide vanes (22), and a plurality of guide vanes (22) are arranged at intervals in apron (21) circumference and inwards extend from apron (21) edge contrary water flow direction spiral, adjacent two restrict out water diversion runner (24) between guide vane (22), apron (21) part that guide vane (22) top corresponds is at least local to be missed and is formed with water diversion runner (24) export be linked together water diversion mouth (23), the export of water diversion runner (24) constitute water diversion mouth (201).

8. The cleaning machine of claim 7, wherein: the cover plate (21) is disc-shaped, the projection of the outer ends of the guide vanes (22) on the horizontal plane is positioned at the edge of the disc-shaped cover plate (21), and the guide vanes (22) are circumferentially enclosed on the cover plate (21) to form an enclosed cavity (100) for pressurizing and circumferentially dividing water flow under the cover plate (21).

9. The cleaning machine of claim 8, wherein: in the assembled state, the edge of the cover plate (21) is close to the inner peripheral wall of the pump shell (1), and the outer end of the guide vane (22) is close to the inner wall of the pump shell (1).

10. The cleaning machine of claim 7, wherein: in the two adjacent guide vanes (22), the outer end part of the first guide vane (22) and the inner end arrangement part of the second guide vane (22) are staggered to enclose the water diversion flow passage (24), and the cover plate (21) is in a range from the outer end of the corresponding first guide vane (22) to the outer end of the second guide vane (22) to form the water diversion port (23).

11. The cleaning machine of claim 7, wherein: the upper surface of the cover plate (21) is provided with a converging blade (25) which extends from the edge to the middle in a spiral manner and is used for converging the water conveyed by the water guide port (23) to the upper part of the central part of the water guide port.

12. The cleaning machine of claim 6, wherein: the central part of the upper surface of apron (21) is provided with from outside-in upwards extending water conservancy diversion awl (26), conflux blade (25) be a plurality of and at apron (21) circumference interval arrangement, the inner of conflux blade (25) links up with the outward flange of water conservancy diversion awl (26).

13. The cleaning machine of claim 6, wherein: the second water outlet (12) is tangentially connected with the inner wall of the pump shell (1), and centrifugal blades of the centrifugal impeller (3) extend obliquely from the center to the edge along the water diversion direction of the second water outlet (12) in the pump shell (1).

14. The cleaning machine of claim 5, wherein: the inlet of the top spray arm (b) is positioned at the top or the side part of the top spray arm, the spray hole of the top spray arm (b) is downwards arranged, the bottom of the pipeline (9) is transversely arranged, the inlet end of the pipeline is communicated with the second water outlet (12), the middle part of the pipeline (9) vertically extends, and the upper part of the pipeline (9) is transversely arranged, and the outlet end of the pipeline is communicated with the top spray arm (b).

15. The cleaning machine of claim 14, wherein: the box (4) is a water tank with a top opening, an upturning door body is arranged at the opening of the top of the water tank, the top spray arm (b) is arranged at the inner surface of the door body, the inlet end of the top spray arm (b) is positioned at the top of the top spray arm, and at least part of the upper part of the pipeline (9) is positioned in the door body so as to be connected with the inlet end of the top spray arm (b).

16. The cleaning machine of any one of claims 1-13, wherein: the water return device is characterized in that the first cavity (401) and the second cavity (402) are formed in the water return area (41) in an integrated mode, a top opening is formed in the top of the second cavity (402), a top sealing cover (44) is arranged at the top opening, and the first water outlet (11) is formed in the top sealing cover (44).

17. A cleaning method, characterized in that:

(1) The water is fed into the box body (4), the water pumping mechanism (5) operates, the water in the water return area (41) is pumped into the bottom spray arm (a) and the top spray arm (b), the water is sprayed upwards through the bottom spray arm (a) and the top spray arm (b) downwards, the to-be-cleaned objects in the box body (4) are washed, and after the washing is finished, the water pumping mechanism (5) stops operating and drains water;

the cleaning process is carried out for at least 2 times, and in at least one cleaning process, the heating piece (6) heats the washing water;

(2) After cleaning, the residual water in the bottom spray arm (a) flows to the water outlet (43) through the second cavity (402), the first cavity (401), the heating element (6) and the water return port (412) under the action of gravity, and the residual water in the top spray arm (b) falls down through the spray holes of the top spray arm, is partially adhered to or stays in the flow channel of the top spray arm, and the residual water in the pipeline (9) for supplying water for the top spray arm (b) falls back and enters the second cavity (402) under the action of gravity, and further flows to the water outlet (43) through the first cavity (401), the heating element (6) and the water return port (412);

(3) Running pump water mechanism (5), drawing water subassembly and producing the circulating wind that wind pressure is big and windage is little, this circulating wind is with the air in box (4) through return water mouth (412), heating piece (6), first cavity (401) inhale in second cavity (402), from second cavity (402) are through first delivery port (11) to bottom spray arm (a) realization from bottom to top blowing, through second delivery port (12), pipeline (9) are to top spray arm (b), in this process, by heating piece (6) heating or the air or the steam of surplus warm-keeping is dry pipeline (9), and blow the surplus water in top spray arm (b) to box (4) through its orifice, discharge through outlet (43).