CN117694800A

CN117694800A - Cleaning machine

Info

Publication number: CN117694800A
Application number: CN202410048357.0A
Authority: CN
Inventors: 姚永磊; 郑峰; 刁硕; 施郑赞; 韩健健; 魏本柱
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2023-04-25
Filing date: 2024-01-11
Publication date: 2024-03-15
Also published as: CN117738914A; CN117694797A; CN117883024A; CN117759539A; CN117694798A; CN117694799A; CN117722364A; CN117883025A; CN117694796A; CN117703767A; CN117803574A; CN117752271A

Abstract

The invention relates to a cleaning machine, which comprises a box body and a water pump, wherein a concave water return area is arranged at the bottom of the box body, the water pump is arranged in the water return area, the water pump comprises a pump shell and an impeller, a water inlet is formed at the bottom of the pump shell, a flow channel which extends outwards in a spiral mode along the circumferential direction is arranged at the side of the pump shell, the tail end of the flow channel forms a water outlet end of the pump shell, and the impeller is rotatably arranged in the pump shell. According to the invention, the water pump is arranged in the water return area, the water inlet which is directly communicated with the water return area is formed at the bottom of the water pump, so that an open water pump is formed, the water flow communication between the water return area and the water pump can be realized without pipeline connection, and the water pump is convenient to realize no residual water; the utility model discloses a pump case surrounds the impeller completely wherein, has reduced the volumetric leakage loss, and simultaneously, the water pump realizes the pressurization of rivers through the runner that the spiral extends and draws out, has both satisfied the pressurization demand of rivers, has reduced the rivers output route of bending again, is favorable to reducing fluid energy loss to improve pump water efficiency and lift.

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

Dishwashers have found widespread use in home kitchens. The dishwasher is generally provided with a spray arm for spraying water columns, a concave backwater area is arranged at the bottom of the dishwasher body, the top of the backwater area is covered with a filter plate, and the backwater area is pumped into the spray arm above the filter plate by a water pump, so that the circulation spraying of washing water is realized. The open type water pump is adopted as the spray arm to draw water, so that a water return path can be greatly shortened, water return efficiency is improved, and the water pump is convenient to maintain.

CN 201320889409.4 "open water tank cleaner" discloses the first generation open water pump structure that the applicant developed, and it has realized the no pipeline of water pump and has drawn water through water conservancy diversion support and spray arm cooperation, and its water conservancy output route does not have the bending simultaneously, is convenient for realize the no surplus water effect after the water pump is used up. However, the water pump volume leakage loss is large due to the overlarge open area of the diversion bracket, so that the water pumping efficiency and the lift of the water pump are greatly influenced.

CN 202222626041.4 "water flow system for cleaning machine and cleaning machine", CN 202211216010.X "a guide vane structure and open water pump, cleaning machine" disclose the second generation open water pump structure developed by the applicant, it has realized pressurizing and co-guiding water flow through setting up the guide vane structure in the pump cavity, the impeller is enclosed in the pressurized cavity enclosed by pump shell lower part and guide vane, although overcome the big problem of volume leakage of the open water pump of the first generation, because the guide vane structure is more complicated, the hydraulic output path in the pump shell is bent comparatively more, has produced corresponding hydraulic loss, still influenced pump water efficiency and lift of the water pump to a great extent.

Therefore, there is a need for further improvement in the structure of the current cleaning machine using the open water pump.

Disclosure of Invention

The invention aims to solve the technical problem of providing a cleaning machine which can improve the pumping efficiency and the lift by reducing the volume leakage loss and the hydraulic output bending path.

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

the utility model provides a cleaning machine, includes box and water pump, the bottom of the box is provided with the backwater region of indent, the water pump is located in the backwater region, the water pump includes pump case and impeller, it has the water inlet to open to pump case bottom, the lateral part is provided with along the outside spiral extension's of circumference runner, the end of this runner forms the play water end of pump case, the impeller can locate in the pump case rotationally.

Preferably, the end of the flow channel is provided with a water guide section extending upwards to the upper part of the water return area, and the upper port of the water guide section forms the water outlet of the pump shell. Above-mentioned water guide section is preferred with water pump integrated into one piece, throws out the rivers homeopathic upwards that the spiral was thrown away through the water guide section like this, is favorable to reducing fluid energy loss, and surplus water can be downwards through the water pump in the return water region with very short route fast after the water pump stops rotating simultaneously, avoids remaining surplus water to bring breeds the problem of bacterium and peculiar smell.

Preferably, a spray arm is arranged on the water return area, a water inlet is formed in the bottom wall of the spray arm, and a water outlet of the water guide section is communicated with the water inlet. The spray arm is a main spray arm positioned at the bottom of the washing cavity, and is supplied with water through the water guide section, so that the spray arm can be favorable for maintaining the high lift of the spray column of the spray arm under the hydraulic stroke as short as possible.

Preferably, a first diversion curved surface which is used for smoothly connecting the inner bottom wall of the flow channel with the lower port of the water guide section is formed at the position of the inner bottom wall of the corresponding flow channel at the bottom of the pump shell, the first diversion curved surface forms an arc-shaped structure which gradually extends upwards along the water flow direction, and the height of the upward extension is preferably not less than 50% of the thickness of the inner cavity of the pump shell. The top of the pump shell is provided with a second diversion curved surface which is formed at the position corresponding to the inner top wall of the flow channel and is used for smoothly connecting the inner top wall of the flow channel with the lower port of the water guide section, and the second diversion curved surface forms an arc-shaped structure which gradually extends upwards along the water flow direction. By adopting the structure, the transition diversion treatment is carried out at the joint of the water guide section and the pump shell, so that the hydraulic output bending path can be further reduced, the energy loss generated during fluid reversing is reduced, and the high pumping efficiency and the high lift are maintained.

In the present invention, the pump housing includes a body having a disk shape, and the water outlet is offset in a horizontal direction with respect to a center of the water pump.

Preferably, the water return area is located at a central portion of the bottom of the tank, the water pump is offset in the water return area with respect to the center of the water return area in a top view, and the water outlet of the water pump is centrally arranged in the water return area. The invention realizes pressurized drawing-out of fluid through the spiral extending flow channel so as to reduce the hydraulic output bending path, the spiral extending flow channel inevitably leads the water outlet and the water inlet to be arranged in a non-coaxial way, and simultaneously, the water outlet is required to be positioned at the center of the box body in consideration of the requirement of the spraying effect.

Further preferably, the water guide section is vertically arranged in a central area of the lower part of the tank body, the bottom of the tank body has a length L and a width W, and the middle part is seen from the top viewThe central area takes the center of the box body as the center of the circle, and the radius R= (0.15-0.45) (L, W) of the central area _min . This construction centers the water guide section at the bottom of the wash chamber to supply water to the bottom spray arm and to cover as much spray area as possible.

Preferably, the impeller is a centrifugal impeller, an impeller inlet corresponding to the water inlet is arranged at the bottom of the impeller, and an impeller outlet corresponding to the inner side wall of the pump shell is arranged at the side part of the impeller. This structure is advantageous in improving the water absorption efficiency.

Preferably, the side part of the pump shell is provided with a diversion flow passage extending outwards in a spiral way along the circumferential direction, and the upper part of the box body is provided with an upper spray arm communicated with the diversion flow passage. The flow dividing flow passages and inlets of the flow passages are arranged at intervals in the circumferential direction of the pump casing, and worm lines for pressurizing water flows entering the corresponding flow passages are symmetrically arranged in the circumferential direction of the pump casing. When the washing cavity is large in size and more than one spray arm is needed, the structure can be adopted, so that the water pumping efficiency can be improved on the basis of reducing the hydraulic output bending path as much as possible.

Preferably, the pump casing has a hollow pump chamber, the flow passage extends outside the pump chamber and is close to the outer side of the pump casing, a side wall of the pump casing, which is clamped between the pump chamber and the flow passage, forms a split-flow partition, and the inner end of the split-flow partition forms a first partition tongue of the pump casing. According to the invention, the flow channel extends close to the outer side wall of the pump cavity, the flow dividing partition plate is used for separating the pump cavity from the flow channel, and after part of water flow enters the flow channel, the direction of the water flow in the flow channel is basically consistent with the circulation direction at the inner side of the flow dividing partition plate, so that the pressure at the two sides of the flow dividing partition plate is balanced, the vibration of the first partition tongue caused by pressure difference impact is greatly reduced, and the noise is reduced; the pump shell of the invention is relatively closed, thereby reducing the volume leakage loss and being beneficial to improving the water pumping efficiency and the lift.

Preferably, the side part of the pump shell is also provided with a diversion flow passage extending outwards along the circumferential spiral, and the joint part of the diversion flow passage and the side wall of the pump shell forms a second partition tongue of the pump shell. Considering that for a large-volume dishwasher, two or more water supplies may be required, the present invention is further provided with the above-mentioned flow dividing flow passage to realize the two water supply demands by one water pump. The existing centrifugal water pump structure is characterized in that two water outlet flow channels are required to be arranged, when the two water outlet flow channels are required to be adjacently arranged under specific installation requirements, the partition tongues corresponding to the two water outlet flow channels are also arranged adjacently, and the two water outlet flow channels are sequentially output, so that the annular flow in the pump cavity is unstable in the circumferential direction, the impact force of the partition tongues is large, the partition tongues arranged adjacently cause uneven pressurizing effect of the inner wall of the pump cavity on the two water outlet flow channels, and the output lift of the two water outlet flow channels and the pumping efficiency of the water pump are greatly influenced while larger noise is generated. According to the invention, the purpose of adjacent arrangement of the flow channels and the flow dividing flow channels is realized by matching the spiral trend of the flow dividing partition plates with the flow channels, and meanwhile, the advantage of symmetrical arrangement of the two partition tongues is taken into account, so that water flow in the pump cavity can perform stable circulation, each channel of water outlet is fully pressurized through the inner wall of the corresponding pump shell, noise is effectively reduced, and the lift and the water pumping efficiency of the two channels of water outlet are improved.

Preferably, the inner side wall of the diversion partition plate and the inner side wall of the pump shell between the diversion partition plate and the diversion flow passage form a second pressurizing surface for pressurizing the water flow output by the diversion flow passage. The second pressurizing surface is formed by the diversion partition plate and the downstream side wall of the pump shell extending in a homeopathic manner, so that the output stroke of the transition joint of each part corresponding to the water flow is reduced while the integral structure of the pump is simplified, and the water flow loss is reduced.

Preferably, the length of the inner side wall of the flow dividing partition plate is 10-100% of the length of the second pressurizing surface along the water flow direction. Further preferably, the length of the inner side wall of the split flow separator is 50% -90% of the length of the second pressing surface. The length of the dividing partition plate, namely the shared length of the flow channel and the inner side wall of the pump cavity, can be limited, so that the pressurizing effect of the water pump on the output water flow can be improved and the water outlet lift can be improved under the condition of balancing the pressure difference of the two sides of the dividing partition plate.

Preferably, a portion of the inner side wall of the pump housing located upstream of the flow passage forms a first pressurizing surface for pressurizing the water flow output through the flow passage. The structure is mainly used for pressurizing the flow output water flow of the flow channel so as to ensure that the flow output water flow of the flow channel has a larger lift.

Preferably, at least part of the first pressing surface and the second pressing surface are arranged symmetrically in the circumferential direction, and the symmetry center of the first pressing surface and the second pressing surface is generally the center of the pump shell or the center of the impeller. Further preferably, a symmetrical portion of the first pressing surface and the second pressing surface in the circumferential direction is not less than 50% of the length of the first pressing surface or the second pressing surface. Still further, the projection of the first pressurizing surface in the horizontal plane forms a first volute section, the projection of the second pressurizing surface in the horizontal plane forms a second volute section, the first volute section and the second volute section are arranged in a central symmetry manner in the circumferential direction, and the symmetry center of the first volute section and the second volute section is generally the center of a pump shell or the center of an impeller. At least part of the first pressurizing surface and the second pressurizing surface are arranged in a central symmetry mode, so that water flow in the pump can run more stably in the circumferential direction, the pressurizing effect of two paths of water outlet is more uniform, noise is reduced, and the pumping effect is improved.

Preferably, the projection of the inner side wall of the flow channel in the horizontal plane is consistent with the spiral track of the corresponding second spiral section. By adopting the structure, the force transmission on the split flow partition plate is more uniform, and the pressure difference balance effect on two sides of the split flow partition plate is improved.

Preferably, the first partition tongue and the second partition tongue are symmetrically arranged in the circumferential direction of the pump casing. By adopting the structure, the pressurizing surfaces of the two flow passages are evenly separated, thereby balancing the flow state of the circulation in the pump cavity, pressurizing the two paths of output water flow to the maximum extent, keeping the water pump to stably operate, and improving the water pumping efficiency and the pump lift.

Preferably, the water flow direction at the outer end of the flow channel is a, the water flow direction at the outer end of the flow dividing flow channel is b, and the included angle formed between a and b is 15-90 degrees. More preferably, the angle formed between a and b is 30 to 45 degrees. In the present invention, the flow path extends in a spiral path as a whole, and at least the downstream portion of the flow path is a straight pipe section, so that the direction a can be regarded as the tangential direction of the flow path end, and the direction b can be regarded as the direction of the central axis of the flow path. By adopting the scheme of the invention, the water outlet directions of the two flow channels are arranged to be the included angle, so that the two flow channels are basically adjacent and compact, and when the two flow channels are installed in a water return area, the two flow channels occupy smaller space, thereby saving the installation space, being beneficial to reducing the volume of the water return area and the water consumption.

In the invention, the bottom outside the box body is provided with a driving part, and the output shaft of the driving part penetrates through the bottom wall of the box body and the water inlet to be connected with the centrifugal impeller in the pump shell.

Preferably, the water return area is of a triangular structure with a rounded corner transition, the water pump is arranged in a mounting area surrounded by an angle and an adjacent straight edge of the water pump, and the water outlet is positioned at the center of the triangular structure. By adopting the structure, the volume of the backwater area is reduced, the backwater efficiency is improved, and in addition, the slag collecting effect can be improved by reasonably arranging the positions of all functional pieces. Specific: the water return area of the existing cleaning machine is in a semicircular-like shape on the whole, the water return area needs to be offset on the bottom wall of the box body in consideration of the fact that the spray arm needs to be arranged in the middle of the box body to better cover the tableware cleaning range, the slag collecting basket located beside the spray arm is also offset on the bottom wall of the box body, in the water return process, the ideal effect is that the water return enters the water return area after residues are filtered by the slag collecting basket, and then the water suction port located in the water return area is further drawn into the spray arm through the open water pump, however, due to the fact that the offset distance of the slag collecting basket relative to the bottom wall of the box body is too large, the water return enters the water return area when the water does not flow to the slag collecting basket, the slag collecting effect is poor, and the residue retention problem easily exists on the filter plate. Meanwhile, the structure of the backwater area of the existing cleaning machine determines that the heating element positioned beside the water pump is biased on the bottom wall of the box body, and in order to improve the heating efficiency, the backwater area which is adaptive to the heating element is required to be arranged on the heating element, so that the backwater area is required to have a volume which meets the installation requirements of the heating element and the slag collecting basket, the total volume of the backwater cavity is difficult to be small, a certain amount of water is wasted, and the water efficiency of the cleaning machine is influenced. According to the invention, the water return area is set to be of a triangular structure, a water pump, a slag collecting basket and a heating piece can be respectively arranged at each corner area of the triangular structure, and then the water outlet is guided to the residual space at the central part of the triangular structure through the offset water outlet of the water pump, so that the space of the water return area is utilized to the greatest extent, the volume of the water return area is greatly reduced, the consumption of washing water at each time is saved, and the water return speed and the water efficiency are improved; because the water pump no longer occupies the central part of cleaning machine bottom, collect sediment basket can be close to the central part of cleaning machine bottom more, is favorable to improving album sediment effect.

Preferably, the projection length S of the path of the flow channel (212) along the water flow direction on the horizontal plane and the base circle diameter D of the water pump (2) meet the following relation: s= (0.2-2) D, and more preferably S= (0.6-1.8) D, so that the water pump is ensured to be positioned in a water return area, the flow path is greatly shortened compared with the traditional external centrifugal pump, the flow channel loss is reduced, and the residual water is easily discharged.

Compared with the prior art, the invention has the advantages that: according to the invention, the water pump is arranged in the water return area, the water inlet which is directly communicated with the water return area is formed at the bottom of the water pump, so that an open water pump is formed, the water flow communication between the water return area and the water pump can be realized without pipeline connection, and the water pump is convenient to realize no residual water; the utility model discloses a pump case surrounds the impeller completely wherein, has reduced the volumetric leakage loss, and simultaneously, the water pump realizes the pressurization of rivers through the runner that the spiral extends and draws out, has both satisfied the pressurization demand of rivers, has reduced the rivers output route of bending again, is favorable to reducing fluid energy loss to improve pump water efficiency and lift.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the water pump of FIG. 1;

FIG. 3 is a schematic view showing the structure of the lower part of the pump casing in embodiment 1 of the present invention;

FIG. 4 is a position assembly view of the lower part of the pump casing in the return water region in example 1 of the present invention;

FIG. 5 is a schematic view showing the structure of the lower part of the water pump in embodiment 2 of the present invention;

fig. 6 is a schematic structural diagram of embodiment 3 of the present invention.

Detailed Description

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

Example 1:

as shown in fig. 1 to 4, the cleaning machine of the present embodiment includes a box 1 (a space for cleaning is referred to as a cleaning chamber in the cleaning machine), a water pump 2 and a spray arm (not shown in the drawing), a water return area 11 is provided at the bottom of the box 1, a filter plate (not shown in the drawing) is covered on the top of the water return area 11, the water pump 2 is provided in the water return area 11, the spray arm is a main spray arm, and is rotatably provided above the filter plate, and the water pump 2 is used for pumping water in the water return area 11 into the spray arm above the filter plate.

The water pump 2 of the present embodiment includes a pump casing 21 and an impeller 22, a water inlet 211 is formed in the bottom of the pump casing 21, a flow passage 212 spirally extending outward in the circumferential direction is provided at the side portion, the end of the flow passage 212 forms the water outlet end of the pump casing 21, and the impeller 11 is rotatably provided in the pump casing 21. The projected length of the path of the flow path 212 in the water flow direction on the horizontal plane (the plane perpendicular to the rotation axis of the impeller 22) is denoted as S, and the base circle diameter of the water pump 2 is denoted as D, in this embodiment s=0.6d. The end of the flow channel 212 is provided with a water guiding section 213 extending upwards above the water return area 11, the upper port of the water guiding section 213 constituting the water outlet 214 of the pump housing 21. The water guide section 213 and the water pump 2 are integrally formed, so that water flow thrown out by the spiral is thrown upwards by the water guide section 213, thereby being beneficial to reducing the energy loss of the fluid, and the water pump 2 is also beneficial to discharging residual water after stopping rotating.

The bottom wall of the spray arm is provided with a water inlet, the spray arm is rotationally restrained at the top of the water guide section 213 through the existing rotary connecting piece such as a clamping ring, and the water outlet 214 of the water guide section 213 is communicated with the water inlet of the spray arm. The spray arm is a main spray arm positioned at the bottom of the washing cavity, and is supplied with water through the water guide section 213, so that the spray arm can be favorable for maintaining the high lift of the spray column of the spray arm under the shortest hydraulic stroke.

The bottom of the pump casing 21 is formed with a first guiding curved surface c at the bottom wall of the corresponding flow channel 212, which smoothly connects the inner bottom wall of the flow channel 212 with the lower port of the water guiding section 213, and the first guiding curved surface c forms an arc structure extending upwards gradually along the water flow direction, and the height of the upward extension is not less than 50% of the thickness of the inner cavity of the pump casing 21. The top of the pump casing 21 is formed with a second guide curved surface d at the inner top wall of the corresponding flow channel 212, which smoothly connects the inner top wall of the flow channel 212 with the lower port of the water guide section 213, and the second guide curved surface d forms an arc structure extending upwards gradually along the water flow direction. By adopting the structure, the transition diversion treatment is carried out at the joint of the water guide section 213 and the pump shell 21, so that the hydraulic output bending path can be further reduced, the energy loss generated during fluid reversing is reduced, and the high pumping efficiency and the high lift are maintained.

In this embodiment, the pump housing 21 includes a body having a disk shape, and the water outlet 214 is offset in a horizontal direction with respect to the center of the pump.

The water return area 11 is located in the central part of the bottom of the tank 1, the water pump 2 is offset in the water return area 11 with respect to the centre of the water return area 11 in a top view, and the water outlet 214 of the water pump 2 is centrally arranged in the water return area 11. Because the pressurized drawing-out of the fluid is realized through the spiral extending flow channel 212 to reduce the hydraulic output bending path, the spiral extending flow channel 212 inevitably leads the water outlet 214 and the water inlet 211 to be arranged non-coaxially, meanwhile, the water outlet 214 is required to be positioned at the center of the tank body 1 in consideration of the requirement of the spraying effect.

The water guide section 213 is vertically arranged in a central area O at the lower part of the case 1, the bottom of the case 1 has a length L and a width W, the central area O is centered on the center of the case 1 in a plan view, and a radius r= (0.15-0.45) (L, W) of the central area O _min . Wherein, (L, W) _min Is the minimum in L, W.

The impeller 22 of this embodiment is a centrifugal impeller, an impeller inlet corresponding to the water inlet 211 is provided at the bottom of the impeller 22, and an impeller outlet corresponding to the inner side wall of the pump casing 21 is provided at the side of the impeller 22. The outer bottom of the casing 1 is provided with a driving part, which is a motor, and the output shaft 3 of the motor passes through the bottom wall of the casing 1 and the water inlet 211 to be connected with the centrifugal impeller in the pump casing 21.

In this embodiment, the water return area 11 is a triangle structure with rounded transition, the water pump 2 is disposed in a mounting area surrounded by an angle and its adjacent straight edge, and the water outlet 214 is located at the center of the triangle structure. By adopting the structure, the volume of the backwater area is reduced, the backwater efficiency is improved, and in addition, the slag collecting effect can be improved by reasonably arranging the positions of all functional pieces. Specific: the water return area of the existing cleaning machine is in a semicircular-like shape on the whole, the water return area needs to be offset on the bottom wall of the box body in consideration of the fact that the spray arm needs to be arranged in the middle of the box body to better cover the tableware cleaning range, the slag collecting basket located beside the spray arm is also offset on the bottom wall of the box body, in the water return process, the ideal effect is that the water return enters the water return area after residues are filtered by the slag collecting basket, and then the water suction port located in the water return area is further drawn into the spray arm through the open water pump, however, due to the fact that the offset distance of the slag collecting basket relative to the bottom wall of the box body is too large, the water return enters the water return area when the water does not flow to the slag collecting basket, the slag collecting effect is poor, and the residue retention problem easily exists on the filter plate. Meanwhile, the structure of the backwater area of the existing cleaning machine determines that the heating element positioned beside the water pump is biased on the bottom wall of the box body, and in order to improve the heating efficiency, the backwater area which is adaptive to the heating element is required to be arranged on the heating element, so that the backwater area is required to have a volume which meets the installation requirements of the heating element and the slag collecting basket, the total volume of the backwater cavity is difficult to be small, a certain amount of water is wasted, and the water efficiency of the cleaning machine is influenced. According to the invention, the water return area is set to be of a triangular structure, a water pump, a slag collecting basket and a heating piece can be respectively arranged at each corner area of the triangular structure, and then the water outlet is guided to the residual space at the central part of the triangular structure through the offset water outlet of the water pump, so that the space of the water return area is utilized to the greatest extent, the volume of the water return area is greatly reduced, the consumption of washing water at each time is saved, and the water return speed and the water efficiency are improved; because the water pump no longer occupies the central part of cleaning machine bottom, collect sediment basket can be close to the central part of cleaning machine bottom more, is favorable to improving album sediment effect.

In the embodiment, the water pump 2 is arranged in the water return area 11, the water inlet 211 which is directly communicated with the water return area 11 is formed at the bottom of the water pump 2, so that an open water pump is formed, water flow communication between the water return area 11 and the water pump 2 can be realized without pipeline connection, and no residual water of the water pump is convenient to realize; the impeller 22 is completely surrounded by the pump shell 21 of the water pump 2 in the embodiment, so that the volume leakage loss is reduced, meanwhile, the water pump 2 realizes pressurized drawing of water flow through the helically extending flow channel 212, thereby not only meeting the pressurizing requirement of the water flow, but also reducing the water flow output bending path, and being beneficial to reducing the fluid energy loss, thereby improving the water pumping efficiency and the lift.

Example 2:

this embodiment differs from embodiment 1 in that: the present embodiment is a dual outlet water pump.

As shown in fig. 5 and 6, a diversion flow passage 215 extending spirally outward in the circumferential direction is provided at the side portion of the pump casing 21, and an upper shower arm communicating with the diversion flow passage 215 is provided at the upper portion of the tank 1. The inlet of the flow dividing flow passage 215 and the inlet of the flow passage 212 are arranged at intervals in the circumferential direction of the pump casing 21, and the worm lines 012, 022 for pressurizing the water flow entering the corresponding flow passages are symmetrically arranged in the circumferential direction of the pump casing 21 so as to reduce the energy loss and noise of the fluid. When the washing cavity is large in size and more than one spray arm is needed, the structure can be adopted, so that the water pumping efficiency can be improved on the basis of reducing the hydraulic output bending path as much as possible.

In this embodiment, the projection length of the path of the flow channel 212 along the water flow direction on the horizontal plane is denoted as S and the base circle diameter D of the water pump 2 satisfy the following relationship: s=1.7d.

Example 3:

as shown in fig. 5 and 6, in the embodiment 2, a flow passage 212 of the present embodiment extends outside a pump chamber 10 and is adjacent to the outside of a pump casing 1, a side wall of the pump casing 1 interposed between the pump chamber 10 and the flow passage 212 forms a split-flow partition 100, and an inner end of the split-flow partition 100 forms a first partition 001 of the pump casing 1. In this embodiment, the flow channel 212 extends close to the outer side wall of the pump cavity 10, and separates the pump cavity 10 from the flow channel 212 by using the split flow partition plate 100, and after part of water flows enter the flow channel 212, the direction of the water flow in the flow channel 212 is basically consistent with the circulation direction inside the split flow partition plate 100, so that the pressures at two sides of the split flow partition plate 100 are balanced, the vibration of the first partition tongue 001 caused by pressure difference impact is greatly reduced, and the noise is reduced; the pump shell 1 of the embodiment is relatively closed, thereby reducing the volume leakage loss and being beneficial to improving the water pumping efficiency and the lift.

The outer end of the split diaphragm 100 extends outwardly along its spiral trend and is connected to a first side of the split flow path 215, and a second side of the split flow path 215 is connected to the side wall of the pump casing 1 and forms a second diaphragm 002 of the pump casing 1 at the connection. The first partition tongue 001 and the second partition tongue 002 are arranged symmetrically at the center in the circumferential direction of the pump casing 1, a straight line passing through the first partition tongue 001 and the second partition tongue 002 is L, and the flow passage 212 and the split flow passage 215 are located on the same side of the straight line L. The existing centrifugal water pump structure is characterized in that two water outlet flow channels are required to be arranged, when the two water outlet flow channels are required to be adjacently arranged under specific installation requirements, the partition tongues corresponding to the two water outlet flow channels are also arranged adjacently, and the two water outlet flow channels are sequentially output, so that the annular flow in the pump cavity is unstable in the circumferential direction, the impact force of the partition tongues is large, the partition tongues arranged adjacently cause uneven pressurizing effect of the inner wall of the pump cavity on the two water outlet flow channels, and the output lift of the two water outlet flow channels and the pumping efficiency of the water pump are greatly influenced while larger noise is generated. According to the invention, the purpose of adjacent arrangement of the flow channels and the flow dividing flow channels is realized by matching the spiral trend of the flow dividing partition plates with the flow channels, and meanwhile, the advantage of symmetrical arrangement of the two partition tongues is taken into account, so that water flow in the pump cavity can perform stable circulation, each channel of water outlet is fully pressurized through the inner wall of the corresponding pump shell, noise is effectively reduced, and the lift and the water pumping efficiency of the two channels of water outlet are improved.

The inner side wall of the part of the pump housing 1 located upstream of the flow passage 212 forms a first pressurizing surface 011 for pressurizing the water flow outputted through the flow passage 212, and the structure mainly pressurizes the water flow outputted from the flow passage 212 to ensure that the water flow outputted from the flow passage 212 has a large lift. The inner side wall of the dividing wall 100 and the inner side wall of the pump housing 1 between the dividing wall and the dividing flow path 215 together form a second pressurizing surface 021 for pressurizing the water flow outputted through the dividing flow path 215. The second pressurizing surface 021 is formed by the diversion baffle 100 and the downstream side inner wall of the pump shell 1 extending in a homeopathic manner, so that the output stroke of the transition joint of each part corresponding to the water flow is reduced while the integral structure of the pump is simplified, and the water flow loss is reduced.

Along the water flow direction, the length of the inner side wall of the dividing wall 100 is 10% -100%, preferably 50% -90% of the length of the second pressurizing surface 021. The length of the dividing wall 100, i.e. the common length of the flow passage 212 and the inner side wall of the pump chamber 10, is defined so as to improve the pressurizing effect of the water pump on the output water flow and the water outlet lift under the condition of balancing the pressure difference of the two sides of the dividing wall 100.

The first pressurizing surface 011 and at least part of the second pressurizing surface 021 of the present embodiment are arranged centrally in the circumferential direction. The symmetrical part of the first pressurizing surface 011 and the second pressurizing surface 021 in the circumferential direction is not less than 50% of the length of the first pressurizing surface 011 or the second pressurizing surface 021. Further, the projection of the first pressurizing surface 011 in the horizontal plane may form a first worm segment 012, the projection of the second pressurizing surface 021 in the horizontal plane may form a second worm segment 022, and the first worm segment 012 and the second worm segment 022 are arranged symmetrically in the center in the circumferential direction. At least part of the first pressurizing surface 011 and the second pressurizing surface 021 are symmetrically arranged, so that the water flow in the pump can run more stably in the circumferential direction, the pressurizing effect of two paths of water outlet is more uniform, noise reduction is facilitated, and the pumping effect is improved.

The projection of the inner wall of the flow channel 212 in the horizontal plane is consistent with the spiral track of the corresponding second spiral segment 022. With such a structure, the force transmission on the split-flow separator 100 is more uniform, and the pressure difference balancing effect on both sides of the split-flow separator is improved.

In this embodiment, the water flow direction at the outer end of the flow channel 212 is a, the water flow direction at the outer end of the flow dividing channel 215 is b, and the included angle m formed between a and b is 15 to 90 degrees, preferably 30 to 45 degrees. Since the flow path 212 extends in a spiral path as a whole and at least the downstream portion of the flow dividing flow path 215 is a straight pipe section in the embodiment, the direction a described above may be regarded as the tangential direction of the end of the flow path 212 and the direction b may be regarded as the direction of the central axis of the flow dividing flow path 215. By adopting the scheme of the embodiment, the water outlet directions of the two flow channels are arranged into the included angle, so that the two flow channels are basically adjacent and compact, and can be well matched with a triangular structure mentioned later, when the water return area is filled with water, the water return area occupies a small space, the installation space can be saved, the volume of the water return area can be reduced, and the water consumption can be reduced.

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 (1) and water pump (2), box (1) bottom is provided with return water region (11) of indent, in return water region (11), its characterized in that are located to water pump (2): the water pump (2) comprises a pump shell (21) and an impeller (22), wherein a water inlet (211) is formed in the bottom of the pump shell (21), a flow passage (212) which extends outwards in a spiral mode along the circumferential direction is formed in the side portion of the pump shell (21), the tail end of the flow passage (212) forms the water outlet end of the pump shell (21), and the impeller (22) can be rotatably arranged in the pump shell (21).

2. The cleaning machine of claim 1, wherein: the tail end of the flow channel (212) is provided with a water guide section (213) extending upwards to the upper part of the water return area (11), and the upper port of the water guide section (213) forms a water outlet (214) of the pump shell (21).

3. The cleaning machine of claim 2, wherein: a spray arm is arranged on the backwater area (11), the spray arm is positioned at the bottom of the washing cavity, the bottom wall of the spray arm is provided with a water inlet, and a water outlet (214) of the water guide section (213) is communicated with the water inlet.

4. The cleaning machine of claim 2, wherein: the bottom of the pump shell (21) is provided with a first diversion curved surface (c) which is used for smoothly connecting the inner bottom wall of the runner (212) with the lower port of the water guide section (213) at the position corresponding to the inner bottom wall of the runner (212), and the first diversion curved surface (c) forms an arc-shaped structure which gradually extends upwards along the water flow direction.

5. The cleaning machine of claim 2, wherein: the top of the pump shell (21) is provided with a second diversion curved surface (d) which is used for smoothly connecting the inner top wall of the runner (212) with the lower port of the water guide section (213) at the position corresponding to the inner top wall of the runner (212), and the second diversion curved surface (d) forms an arc-shaped structure which gradually extends upwards along the water flow direction.

6. The cleaning machine of claim 1, wherein: the pump housing (21) comprises a disc-shaped body, and the water outlet (214) is offset relative to the center of the water pump (2) in the horizontal direction.

7. The cleaning machine of claim 6, wherein: the water return area (11) is located at the central part of the bottom of the box body (1), the water pump (2) is offset relative to the center of the water return area (11) in the water return area (11) from the top view, and the water outlet (214) of the water pump (2) is arranged in the water return area (11) in the middle.

8. The cleaning machine of claim 2, wherein: the water guide section (213) is vertically arranged in a central area (O) at the lower part of the box body (1), the bottom of the box body (1) is L in length and W in width, the central area (O) takes the center of the box body (1) as a circle center in a top view, and the radius R= (0.15-0.45) (L, W) of the central area (O) _min 。

9. The cleaning machine according to any one of claims 1 to 6, wherein: the impeller (22) is a centrifugal impeller, an impeller inlet corresponding to the water inlet (211) is formed in the bottom of the impeller (22), and an impeller outlet corresponding to the inner side wall of the pump shell (21) is formed in the side portion of the impeller (22).

10. The cleaning machine according to any one of claims 1 to 6, wherein: the pump casing (21) is provided with a hollow pump cavity (10), the flow channel (212) extends outside the pump cavity (10) and is close to the outer side of the pump casing (1), the side wall of the pump casing (1) which is clamped between the pump cavity (10) and the flow channel (212) forms a flow dividing partition plate (100), and the inner end of the flow dividing partition plate (100) forms a first partition tongue (001) of the pump casing (1).

11. The cleaning machine of claim 10, wherein: the side part of the pump shell (1) is also provided with a flow dividing flow passage (215) which extends outwards along the circumferential spiral, and a second partition tongue (002) of the pump shell (1) is formed at the joint part of the flow dividing flow passage (215) and the side wall of the pump shell (1).

12. The cleaning machine of claim 11, wherein: the inner side wall of the diversion partition plate (100) and the inner side wall of the pump shell (1) between the diversion partition plate and the diversion flow passage (215) jointly form a second pressurizing surface (021) for pressurizing the water flow output by the diversion flow passage (215).

13. The cleaning machine of claim 12, wherein: along the water flow direction, the length of the inner side wall of the flow dividing baffle plate (100) is 10-100% of the length of the second pressurizing surface (021).

14. The cleaning machine of claim 13, wherein: the length of the inner side wall of the flow dividing baffle plate (100) is 50-90% of the length of the second pressurizing surface (021).

15. The cleaning machine of claim 12, wherein: an inner side wall of the pump casing (1) positioned at an upstream of the flow passage (212) forms a first pressurizing surface (011) for pressurizing the water flow outputted through the flow passage (212).

16. The cleaning machine of claim 15, wherein: at least part of the first pressurizing surface (011) and the second pressurizing surface (021) are arranged in a central symmetry manner in the circumferential direction.

17. The cleaning machine of claim 16, wherein: the symmetrical part of the first pressurizing surface (011) and the second pressurizing surface (021) in the circumferential direction is not less than 50% of the length of the first pressurizing surface (011) or the second pressurizing surface (021).

18. The cleaning machine of claim 15, wherein: the projection of the first pressurizing surface (011) in the horizontal plane forms a first worm line segment (012), the projection of the second pressurizing surface (021) in the horizontal plane forms a second worm line segment (022), and the first worm line segment (012) and the second worm line segment (022) are arranged in a central symmetry manner in the circumferential direction.

19. The cleaning machine of claim 18, wherein: the projection of the inner side wall of the runner (212) in the horizontal plane is consistent with the spiral track of the corresponding second spiral section (022).

20. The cleaning machine of claim 11, wherein: the first partition tongue (001) and the second partition tongue (002) are symmetrically arranged in the circumferential direction of the pump shell (1).

21. The cleaning machine of claim 11, wherein: the water flow direction at the outer end of the runner (212) is a, the water flow direction at the outer end of the flow dividing runner (215) is b, and an included angle (m) formed between a and b is 15-90 degrees.

22. The cleaning machine of claim 21, wherein: the included angle (m) formed between a and b is 30-45 degrees.

23. The cleaning machine according to any one of claims 1 to 6, wherein: the water return area (11) is of a triangular structure with a rounded corner transition, the water pump (2) is arranged in an installation area surrounded by an angle and the adjacent straight edge, and the water outlet (214) is arranged at the center of the triangular structure.

24. The cleaning machine according to any one of claims 1 to 6, wherein: the projection length S of the path of the flow channel (212) along the water flow direction on the horizontal plane and the base circle diameter D of the water pump (2) meet the following relation: s= (0.2 to 2) D.

25. The cleaning machine of claim 24, wherein: the projection length S of the path of the flow channel (212) along the water flow direction on the horizontal plane and the base circle diameter D of the water pump (2) meet the following relation: s= (0.6 to 1.8) D.

26. The cleaning machine of claim 4, wherein: the height of the upward extension of the first diversion curved surface (c) is not less than 50% of the thickness of the inner cavity of the pump shell (21).