CN114688091A - Volute structure and double-pump system of water pump, cleaning machine - Google Patents

Abstract

The invention relates to a volute structure of a water pump and application thereof, wherein the volute structure of the water pump comprises an upper shell and a lower shell, the upper shell is provided with a first accommodating cavity for installing the upper part of a first power component, the upper part of the lower shell is provided with a second accommodating cavity for installing the lower part of the first power component, the side part of the lower shell is provided with a first water inlet for supplying water into the second accommodating cavity, the lower part of the lower shell is provided with a third accommodating cavity for installing the second power component, and the bottom of the lower shell is provided with a second water inlet for supplying water into the third accommodating cavity. The invention provides a volute structure of an open water pump, wherein a second accommodating cavity and a first accommodating cavity are used for spraying water at the bottom, a third accommodating cavity is used for spraying water at the top and/or the middle, and the power of two paths of water flow is independently supplied by corresponding pumps, so that the lift and the water flow of each path of water flow are improved, and the cleaning effect is favorably improved; moreover, the upper shell and the lower shell are convenient to disassemble and assemble, and can be cleaned, so that bacteria breeding is avoided.

Description

Volute structure and double-pump system of water pump, cleaning machine

Technical Field

The invention relates to the technical field of dish washing machines, in particular to a volute structure of a water pump, a double-pump system and a cleaning machine with the volute structure of the water pump.

Background

For table type and cabinet type dish washing machines, because of the large washing space, in order to achieve better washing effect, a top, a middle and a lower spray arms are generally designed; when the dishwasher is in operation, the washing pump conveys water to the top, the middle and the lower spray arms through pipelines, the water is sprayed out of the top, the middle spray arms and the lower spray arms and washes tableware and then falls back into a water cup at the bottom of the dishwasher, and the washing pump conveys the fallen water to the top, the middle and the lower spray arms again to complete a cycle.

For example, Chinese patent application publication No. CN106859563A, entitled "energy saving dishwasher" (application No. CN201611232345.5), discloses a structure including a chamber for receiving dishes and providing a washing space, a spray system for spraying water to wash the dishes, and a pump body for pumping water and supplying water to the spray system; the spraying system is arranged in the cavity; the water pumping end of the pump body is communicated with the cavity, and the water supply end is communicated with the spraying system; the spraying system comprises an inner water pipe and more than two sets of spraying devices, and the more than two sets of spraying devices are respectively arranged on the inner water pipe; the water supply end of the pump body is connected with a water distribution device, the water distribution device is provided with more than two water outlets corresponding to more than two sets of spraying devices, and the spraying devices are communicated with the corresponding water outlets; when the spraying device works, the water distribution device is communicated with more than one water outlet according to instructions, so that more than one set of spraying device can perform cleaning work.

In the above-mentioned current dish washer that can carry out bottom and spray, top sprays, a pump for supplying water for the spraying system generally adopts closed structure, is about to locate the spiral case of washing pump in the box below, is provided with ability pivoted impeller in the spiral case, and the water inlet of washing pump spiral case is linked together bottom the washing chamber, and the delivery port of spiral case is connected with the water diversion device, and this water diversion device divides into the first branch road of supplying water to bottom spray arm and the second branch road of supplying water to top spray arm with rivers. Because the water pressure of the top spraying water and the water pressure of the bottom spraying water are independently supplied by the washing pump, the lift, the flow and the impact force of the water flow on each branch are greatly reduced after the water flow is divided, and the cleaning effect is influenced; meanwhile, the closed volute fixed below the box body is difficult to disassemble, assemble and clean, bacteria can be bred due to residue accumulation after long-time use, washing effect is influenced, and poor experience can be brought to users.

In addition, the volute structure of the water pump directly influences the water supply capacity of the pump, and the volute in the prior art is mature, so that the water flow lift and flow cannot be improved under the condition that the volute structure of the water pump is not changed.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a volute structure of a water pump, which is beneficial to improving the lift and the water flow of water flow and further improving the cleaning effect, in view of the current situation of the prior art.

A second technical problem to be solved by the present invention is to provide a dual pump system using the volute structure of the water pump, which provides power for two washing waters separately, thereby increasing the lift and water flow rate and further improving the cleaning effect.

A third technical problem to be solved by the present invention is to provide a dual pump system that employs an open volute to facilitate disassembly, assembly, and cleaning, in view of the current situation of the prior art.

The fourth technical problem to be solved by the present invention is to provide a cleaning machine with the above dual pump system, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving at least one technical problem is as follows: a volute structure for a water pump, comprising:

the upper shell is provided with a first accommodating cavity for mounting the upper part of the first power component, and the top wall and/or the side wall of the upper shell are/is provided with spray holes communicated with the first accommodating cavity in a fluid mode; and

the lower shell is connected below the upper shell, a second accommodating cavity used for mounting the lower part of the first power component is formed in the upper part of the lower shell, the second accommodating cavity is communicated with the first accommodating cavity, a flow guide channel extending obliquely downwards is arranged on the side part of the lower shell, and a first water inlet for water to enter the second accommodating cavity is formed in the lower port of the flow guide channel; the lower part of the lower shell is provided with a third accommodating cavity for mounting a second power component, the bottom of the lower shell is provided with a second water inlet for water to enter the third accommodating cavity, and the side part of the lower shell is provided with a water outlet for water to be output from the third accommodating cavity.

In the above scheme, the middle part of the lower shell is provided with a partition board for dividing the second accommodating cavity and the third accommodating cavity into relatively independent cavities. The second accommodating cavity and the third accommodating cavity are relatively independent, so that water supply for downward spraying and top and/or middle spraying is facilitated, mutual fluid disturbance is reduced, the problem of water robbing caused by suction distribution is avoided, capacity loss is reduced, and water flow lift, water flow and spraying strength are improved.

Preferably, the flow guide channel is positioned above the partition plate and extends downwards along the periphery of the partition plate from top to bottom so that the first water inlet is arranged close to the bottom edge of the lower shell. The structure is favorable for reducing the height of the water suction port, avoids air suction and enables the pump to suck water quickly.

Preferably, the third accommodating cavity is approximately disc-shaped, the second accommodating cavity is located above the partition plate and vertically extends, the diameter of the lower port of the second accommodating cavity is smaller than that of the third accommodating cavity, a circular area corresponding to the lower port of the second accommodating cavity is arranged on the upper wall surface of the partition plate, the flow guide channel is provided with a first side wall and a second side wall which are tangentially connected with the outer edge of the circular area, and the first side wall and the second side wall are oppositely arranged and the distance between the first side wall and the second side wall is gradually reduced along the water flow flowing direction. The structure is favorable for pressurizing water flow in the water guide process so as to improve the lift, and the tangential connection mode is favorable for reducing energy loss.

Preferably, the lower housing includes a first housing having a second accommodating cavity and a second housing having a third accommodating cavity, the top of the second housing forms the partition board, a V-shaped slot is disposed on the top wall of the partition board and surrounds a circular area, the circular area is located at the inner end of the V-shaped slot, and the bottom edge of the second housing is in plug-fit connection with the V-shaped slot. The structure is not only beneficial to reducing energy loss, but also convenient for assembly.

In the invention, the second water inlet is arranged on the bottom wall of the second shell, the bottom wall of the second shell is also provided with a V-shaped diversion trench which surrounds the periphery of the second water inlet and is arranged corresponding to the V-shaped clamping groove, and the outer edge of the diversion channel extends downwards and is mutually butted with the outer end of the V-shaped diversion trench so as to form a water absorption area. The V-shaped diversion trench can rectify and guide water entering the second water inlet, and a water absorption area formed by the shell of the diversion channel and the V-shaped diversion trench can limit the water absorption position, so that energy damage caused by water flow disorder is avoided.

Further preferably, an arc-shaped notch which is arched upwards is formed at the outer edge of the lower port of the flow guide channel, and the arc-shaped notch forms a water inlet of the water suction area. In the state of finished assembly, the bottom edges of the V-shaped diversion trench and the diversion channel are abutted against the inner bottom wall of the dish-washing machine, the arc-shaped notch is arranged for water flow suction, and the water suction inlet is controlled at a very low position, so that the water pump is easy to start, and the problem of air suction is avoided; in addition, the water inlet is arranged at the position corresponding to the side wall of the dishwasher residue basket, so that the water suction force can be used for improving the residue collection effect, and the bottom of the volute and the side wall of the residue basket are washed to keep clean.

Preferably, the cross section of the flow guide channel forms a smoothly curved application structure at the outer edge of the corresponding partition plate. This structure is advantageous for further reducing energy loss.

Preferably, the water outlet is arranged on the side wall of the lower shell and is tangentially connected with the third accommodating cavity through a guide pipeline. The structure is beneficial to reducing the capacity loss of the third accommodating cavity for outputting water flow.

Preferably, the second accommodating cavity is divided into a first section, a second section and a third section from bottom to top along the water flow flowing direction, the first section is arranged corresponding to the flow guide channel, the second section is smoothly connected with the first section, the inner diameter of the second section is gradually reduced, and the third section is smoothly connected with the second section, and the inner diameter of the third section is gradually enlarged. The upper end of the flow guide channel is arranged corresponding to the second section and the third section and is in smooth transition at the joint. Above-mentioned structure is favorable to improving the effect of drawing to rivers with corresponding impeller cooperation, and then improves lift and discharge.

Preferably, the bottom wall of the upper housing is provided with a third water inlet arranged corresponding to the first accommodating cavity, the third water inlet is butted with the upper end of a third section of the second accommodating cavity, the third section forms a guide part for smoothly transitionally connecting the inner wall of the second accommodating cavity and the inner bottom wall of the first accommodating cavity, and the outer edge of the guide part is arranged close to the inner edge of the third water inlet. The structure is beneficial to reducing the capacity loss of water flow in the process of entering the first accommodating cavity from the second accommodating cavity.

For the convenience of assembly, the outer circumferential wall of the upper portion of the lower housing is provided with a radially extending support ring on which the upper housing is constrained. The upper wall surface of the support ring is provided with a clamping ring, and the bottom wall of the upper shell is provided with a clamping pin which can rotatably penetrate through the clamping ring to be arranged and is clamped and limited with the bottom wall of the clamping ring, so that the upper shell is detachably connected to the top of the lower shell.

A dual pump system to which the volute structure of the above water pump is applied, comprising:

the volute structure of the water pump;

the upper part of the upper impeller is rotatably arranged in the first accommodating cavity and is used for dispersing water in the first accommodating cavity and spraying the water out of the spray hole; the lower part of the upper impeller is rotatably arranged in the second accommodating cavity and is used for pumping water into the second accommodating cavity through the first water inlet and conveying the water to the first accommodating cavity; and

and the lower impeller is rotatably arranged in the third accommodating cavity and is used for pumping water into the third accommodating cavity through the second water inlet and outputting the water through the water outlet.

Preferably, the lower impeller comprises a central shaft, an end cover extending outwards from the upper part of the shaft gradually along the radial direction, and blades arranged on the lower wall surface of the end cover, in the assembled state, the end cover is arranged close to the inner top wall of the third accommodating cavity, and the lower edges of the blades are arranged close to the second water inlet.

The utility model provides an use cleaning machine that has above-mentioned double pump system, includes the box and can be with the water supply pipe that the water of bottom half upwards carried, its characterized in that: the lower shell is restrained on the inner bottom wall of the box body, and the water outlet is connected with the lower end of the water supply pipeline.

Preferably, the water supply pipeline is provided with a first branch pipeline and a second branch pipeline which are relatively independent, the first branch pipeline is used for conveying water flow to the middle of the box body, and the second branch pipeline is used for conveying water flow to the top of the box body. By adopting the structure, the spraying of the lower layer, the middle layer and the top layer is realized, and the cleaning effect is favorably improved.

Preferably, the bottom of the box body is further provided with a shunt valve for controlling whether the first branch pipeline and the second branch pipeline circulate or not, a water inlet of the shunt valve is connected with a water outlet of the lower shell, a first water outlet of the shunt valve is connected with an input end of the first branch pipeline, and a second water outlet of the shunt valve is connected with an input end of the second branch pipeline. The structure is convenient for controlling the use states of the middle-layer spraying and the top-layer spraying according to requirements, for example, the first branch pipeline can be closed, the second branch pipeline can be opened, and only the top-layer spraying is carried out; the first branch pipeline can be opened, the second branch pipeline can be closed, and only middle-layer spraying is carried out, so that more use requirements are met.

Preferably, the bottom of the box body is provided with a slag basket, and the first water inlet and the second water inlet are both arranged close to the slag basket. The structure is beneficial to improving the slag collecting effect.

Compared with the prior art, the invention has the advantages that: the invention provides a volute structure of an open water pump, wherein a second accommodating cavity and a first accommodating cavity which are positioned at the upper part supply water for spraying at the bottom, a third accommodating cavity which is positioned at the lower part supply water for spraying at the top and/or the middle part, and because the power of two paths of water flow is independently supplied by corresponding pumps, the lift and the water flow of each path of water flow are improved, and the cleaning effect is favorably improved; moreover, the upper shell and the lower shell are convenient to disassemble and assemble, the upper shell is disassembled from the lower shell, the upper shell and the lower shell can be cleaned, and bacteria breeding is avoided.

Drawings

FIG. 1 is a schematic view of a volute structure of a water pump according to an embodiment of the present invention;

FIG. 2 is a schematic bottom view of FIG. 1;

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

FIG. 4 is an exploded view of the lower housing of an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first housing according to an embodiment of the invention;

FIG. 6 is a cross-sectional view of a dual pump system according to an embodiment of the present invention;

fig. 7 is a schematic view of a part of the structure of the cleaning machine according to the embodiment of the invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The volute structure of the water pump of the embodiment is suitable for a double-pump system, namely a pump system capable of providing bidirectional power, the double-pump system can be applied to a dish washing machine with a large volume, and water is supplied for bottom spraying, top spraying and/or middle spraying, and certainly, the volute structure is not limited to the use environment.

As shown in fig. 1 to 7, the volute structure of the water pump of the present embodiment includes an upper housing 3 and a lower housing 4, the upper housing 3 has a body extending in a length direction, a first accommodating cavity 31 is formed in a central portion of the body for installing an upper portion of a first power component, flow passages communicating with the first accommodating cavity 31 are respectively formed on two sides of the body, and a nozzle hole 32 communicating with the flow passages is formed on a top wall of the upper housing 3. The lower shell 4 is connected below the upper shell 3, the upper part of the lower shell 4 is provided with a second accommodating cavity 41 for installing the lower part of the first power component, the second accommodating cavity 41 is correspondingly communicated with the first accommodating cavity 31, and the side part of the lower shell 4 is provided with a first water inlet 411 for water to enter the second accommodating cavity 41; the lower part of the lower shell 4 is provided with a third accommodating cavity 42 for installing a second power component, the bottom of the lower shell 4 is provided with a second water inlet 421 for water to enter the third accommodating cavity 42, and the side part of the lower shell 4 is provided with a water outlet 422 for water to be output from the third accommodating cavity 42.

The middle portion of the lower case 4 is provided with a partition plate 43 for dividing the second receiving chamber 41 and the third receiving chamber 42 into relatively independent chambers. The second accommodating cavity 41 and the third accommodating cavity 42 are relatively independent, so that water supply for downward spraying and top and/or middle spraying is facilitated, mutual fluid disturbance is reduced, the problem of water robbing caused by suction distribution is avoided, capacity loss is reduced, and water flow lift, water flow and spraying strength are improved.

Specifically, the side of the lower housing 4 is provided with a flow guide passage 413 extending obliquely downward, and a lower port of the flow guide passage 413 forms a first water inlet 411 for water to enter the second receiving chamber 41. The flow guide passage 413 is located above the partition 43 and extends downward from top to bottom along the periphery of the partition 43 so that the first water inlet 411 is disposed near the bottom edge of the lower case 4. The structure is favorable for reducing the height of the water suction port, avoids air suction and enables the pump to suck water quickly.

The third accommodating cavity 42 of the present embodiment is substantially disc-shaped, the second accommodating cavity 41 is located above the partition 43 and extends vertically, the diameter of the lower port of the second accommodating cavity 41 is smaller than the diameter of the third accommodating cavity 42, a circular region 400 arranged corresponding to the lower port of the second accommodating cavity 41 is provided on the upper wall surface of the partition 43, the flow guide channel 413 has a first side wall 4133 and a second side wall 4134 tangentially connected to the outer edge of the circular region 400, the first side wall 4133 and the second side wall 4134 are arranged oppositely, and the distance between the two walls is gradually reduced along the water flow flowing direction, so that the flow guide channel 413 is V-shaped in a top view. This structure is favorable to pressurizeing rivers at the water guide in-process to improve the lift, and the tangential connection mode is favorable to reducing energy loss.

The lower shell 4 of this embodiment includes a first shell 4a having a second receiving cavity 41 and a second shell 4b having a third receiving cavity 42, the top of the second shell 4b constitutes the partition 43, a V-shaped slot 432 is disposed on the top wall of the partition 43 and surrounds a circular area 400, the circular area 400 is located at the inner end of the V-shaped slot 432, and the bottom edge of the second shell 4b is inserted into and connected with the V-shaped slot 432. The structure is not only beneficial to reducing energy loss, but also convenient for assembly.

In this embodiment, the second water inlet 421 is opened on the bottom wall of the second casing 4b, a V-shaped guiding groove 433 is further disposed on the bottom wall of the second casing 4b, and the V-shaped guiding groove 433 surrounds the periphery of the second water inlet 421 and is disposed corresponding to the V-shaped clamping groove 432, and the outer edge of the guiding channel 413 extends downward and is butted with the outer end of the V-shaped guiding groove 433 so as to enclose the water absorption region 40. The V-shaped guiding groove 433 can rectify and guide the water entering the second water inlet 421, and the water absorption region 40 formed by the outer shell of the guiding passage 413 and the V-shaped guiding groove 433 can limit the water absorption position, thereby avoiding energy damage caused by water flow disorder.

An upwardly arched arc-shaped notch 4136 is formed at the outer edge of the lower end of the guide passage 413, and the arc-shaped notch 4136 forms the water inlet of the water absorption region 40. In the assembled state, the bottom edges of the V-shaped guide groove 433 and the guide channel 413 are abutted against the inner bottom wall of the dish-washing machine, the arc-shaped notch 4136 is arranged for water flow suction, and the water suction inlet is controlled at a very low position, so that the water pump is easy to start, and the problem of air suction is avoided; in addition, in the embodiment, the water inlets are arranged at the positions corresponding to the side walls of the dishwasher residue basket 9, so that the water suction force can be used for improving the residue collection effect, and the bottom of the volute and the side walls of the residue basket 9 are washed to keep clean.

The cross section of the above-mentioned flow guide channel 413 forms a smoothly curved application structure 4135 at the outer edge of the corresponding partition 43, which structure contributes to further reducing the energy loss.

The water outlet 422 of this embodiment is opened on the sidewall of the second housing 4b and tangentially connected with the third accommodating cavity 42 through the guiding pipe 423. The structure is beneficial to reducing the capacity loss of the third accommodating cavity for outputting water flow.

The second accommodating cavity 41 of this embodiment is divided into a first section 41a, a second section 41b and a third section 41c along the water flow flowing direction from bottom to top, the first section 41a is arranged corresponding to the periphery of the circular area 400, the second section 41b is smoothly connected with the first section 41a and the inner diameter thereof is gradually reduced, and the third section 41c is smoothly connected with the second section 41b and the inner diameter thereof is gradually enlarged. The upper end of the guide passage 413 is arranged corresponding to the side of the second section 41b and the third section 41c and smoothly transits at the connection. Above-mentioned structure is favorable to improving the effect of drawing to rivers with corresponding impeller cooperation, and then improves lift and discharge.

In this embodiment, the bottom wall of the upper housing 3 is provided with a third water inlet 34 disposed corresponding to the first accommodating cavity 31, the third water inlet 34 is butted against an upper end of a third section 41c of the second accommodating cavity 41, the third section 41c forms a guiding portion for smoothly transitionally connecting an inner wall of the second accommodating cavity 41 and an inner bottom wall of the first accommodating cavity 31, and an outer edge of the guiding portion is disposed near an inner edge of the third water inlet 34. This structure is beneficial to reducing the capacity loss of water flow in the process of entering the first accommodating cavity 31 from the second accommodating cavity 41.

For ease of assembly, the outer peripheral wall of the upper portion of the lower case 4 is provided with a radially extending support ring 44, and the upper case 3 is restrained on the support ring 44. A clamping ring 441 is arranged on the upper wall surface of the supporting ring 44, and a clamping pin 33 which can be rotatably arranged through the clamping ring 441 and is clamped and limited with the bottom wall of the clamping ring 441 is arranged on the bottom wall of the upper shell 3, so that the upper shell 3 is detachably connected to the top of the lower shell 4.

The double-pump system of the embodiment comprises the volute structure of the water pump, an upper impeller 1, a lower impeller 2 and a driving part 5, wherein the upper impeller 1 is provided with a first shaft positioned at the center and a plurality of first blades which are distributed on the circumferential surface of the first shaft at intervals along the circumferential direction and extend along the axial direction, the upper parts of the first blades are centrifugal blades, and the lower parts of the first blades are axial flow blades. The upper part of the upper impeller 1 is rotatably arranged in the first accommodating cavity 31 and is used for dispersing water in the first accommodating cavity 31 and spraying the water out of the spraying hole 32; the lower portion of the upper impeller 1 is rotatably disposed in the second receiving chamber 41, and is used for drawing water into the second receiving chamber 41 through the first water inlet 411 and conveying the water to the first receiving chamber 31. The lower impeller 2 is rotatably disposed in the third accommodating chamber 42, and is used for drawing water into the third accommodating chamber 42 through the second water inlet 421 and outputting the water through the water outlet 422.

The lower impeller 2 includes a central shaft 21, an end cover 22 extending radially outward from an upper portion of the shaft 21, and a vane 23 disposed on a lower wall surface of the end cover 22, wherein in an assembled state, the end cover 22 is disposed close to an inner top wall of the third accommodating chamber 42, and a lower edge of the vane 23 is disposed close to the second water inlet 421.

In this embodiment, as shown in fig. 7, the cleaning machine to which the above-mentioned dual pump system is applied includes a tank 6 and a water supply pipe 7 capable of supplying water from the bottom of the tank 6 upward, the lower housing 4 is constrained on the inner bottom wall of the tank 6 and the water outlet 422 is connected to the lower end of the water supply pipe 7. The driving part 5 is a motor and is arranged at the outer bottom of the box body 6, the output shaft 51 is arranged upwards, the output shaft 51 penetrates through the lower shell 4 of the box body 6 from bottom to top and extends into the first accommodating cavity 31 of the upper shell 3 and is respectively connected with the lower impeller 2 and the upper impeller 1 to drive the upper impeller 1 and the lower impeller 2 to rotate.

The water supply pipeline 7 is provided with a first branch pipeline 71 and a second branch pipeline 72 which are relatively independent, the first branch pipeline 71 is used for conveying water flow to the middle of the box body, and the second branch pipeline 72 is used for conveying water flow to the top of the box body. By adopting the structure, the spraying of the lower layer, the middle layer and the top layer is realized, and the cleaning effect is favorably improved.

The bottom of the box 6 is further provided with a shunt valve 8 for controlling whether the first branch pipeline 71 and the second branch pipeline 72 circulate, a water inlet of the shunt valve 8 is connected with a water outlet 422 of the lower shell 4, a first water outlet of the shunt valve 8 is connected with an input end of the first branch pipeline 71, and a second water outlet of the shunt valve 8 is connected with an input end of the second branch pipeline 72. The structure is convenient for controlling the use state of the middle-layer and top-layer spraying according to the requirement, for example, the first branch pipeline 71 can be closed, the second branch pipeline 72 can be opened, and only the top-layer spraying is carried out; the first branch pipeline 71 can be opened, the second branch pipeline 72 can be closed, and only middle-layer spraying is carried out, so that more use requirements can be met.

Above-mentioned 6 bottoms of box are provided with sediment basket 9, and first water inlet 411 and second water inlet 421 all are close to sediment basket 9 and arrange, and this structure is favorable to improving the sediment effect of collection.

When the water-saving device is used, the output shaft 51 of the driving part 5 rotates to drive the upper impeller 1 and the lower impeller 2 to rotate, the axial flow blades at the lower part of the upper impeller 1 suck water into the second accommodating cavity 41 from the first water inlet 411 and convey the water upwards into the first accommodating cavity 31, and the water in the first accommodating cavity 31 is sprayed out through the spray holes 32 under the action of the upper part of the upper impeller 1; the lower impeller 2 sucks water from the second water inlet 421 into the third accommodating chamber 42, and conveys the water to the water supply pipeline 7 through the water outlet 422 along the guide pipeline 423 in the circumferential direction, and the water supply pipeline 7 conveys the water flow upwards for top and/or middle spraying.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the invention, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite or coincident with the direction of gravity.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion, respectively), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion and/or be transported to the second portion, and may be a direct communication between the first portion and the second portion, or an indirect communication between the first portion and the second portion via at least one third element, such as a fluid channel, e.g., a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow through, or a combination thereof.

Claims (19)

1. The utility model provides a spiral case structure of water pump which characterized in that: comprises that

The upper shell (3) is provided with a first accommodating cavity (31) for mounting the upper part of a first power component, and the top wall and/or the side wall of the upper shell (3) is/are provided with spray holes (32) which are communicated with the first accommodating cavity (31) in a fluid mode; and

the lower shell (4) is connected below the upper shell (3), a second accommodating cavity (41) used for installing the lower part of a first power component is formed in the upper part of the lower shell (4), the second accommodating cavity (41) is communicated with the first accommodating cavity (31), a flow guide channel (413) extending obliquely downwards is arranged on the side part of the lower shell (4), and a first water inlet (411) for water to enter the second accommodating cavity (41) is formed at the lower port of the flow guide channel (413); the lower part of the lower shell (4) is provided with a third containing cavity (42) for mounting a second power component, the bottom of the lower shell (4) is provided with a second water inlet (421) for water to enter the third containing cavity (42), and the side part of the lower shell is provided with a water outlet (422) for water to be output from the third containing cavity (42).

2. The volute structure of a water pump of claim 1, wherein: and a partition plate (43) used for dividing the second accommodating cavity (41) and the third accommodating cavity (42) into relatively independent cavities is arranged in the middle of the lower shell (4).

3. The volute structure of a water pump of claim 2, wherein: the flow guide channel (413) is positioned above the partition plate (43) and extends downwards along the periphery of the partition plate (43) from top to bottom so that the first water inlet (411) is arranged close to the bottom edge of the lower shell (4).

4. The volute structure of a water pump of claim 3, wherein: the third accommodating cavity (42) is approximately disc-shaped, the second accommodating cavity (41) is located above the partition plate and vertically extends, the diameter of the lower port of the second accommodating cavity (41) is smaller than that of the third accommodating cavity (42), a circular area (400) corresponding to the lower port of the second accommodating cavity (41) is arranged on the upper wall surface of the partition plate (43), the flow guide channel (413) is provided with a first side wall (4133) and a second side wall (4134) which are tangentially connected with the outer edge of the circular area (400), the first side wall (4133) and the second side wall (4134) are oppositely arranged, and the distance between the first side wall (4133) and the second side wall (4134) is gradually reduced along the water flow flowing direction.

5. The volute structure of a water pump of claim 4, wherein: the lower shell (4) comprises a first shell (4a) with a second containing cavity (41) and a second shell (4b) with a third containing cavity (42), the top of the second shell (4b) forms the partition plate (43), a V-shaped clamping groove (432) arranged around the periphery of a circular area (400) is formed in the top wall of the partition plate (43), the circular area (400) is located at the inner end of the V-shaped clamping groove (432), and the bottom edge of the second shell (4b) is connected with the V-shaped clamping groove (432) in an inserting and matching mode.

6. The volute structure of a water pump of claim 5, wherein: the water absorption device is characterized in that the second water inlet (421) is arranged on the bottom wall of the second shell (4b), a V-shaped flow guide groove (433) which surrounds the periphery of the second water inlet (421) and is arranged corresponding to the V-shaped clamping groove (432) is further arranged on the bottom wall of the second shell (4b), and the outer edge of the flow guide channel (413) extends downwards and is mutually butted with the outer end of the V-shaped flow guide groove (433) to form a water absorption area (40).

7. The volute structure of a water pump of claim 6, wherein: an arc-shaped notch (4136) which is arched upwards is formed at the outer edge of the lower port of the flow guide channel (413), and the arc-shaped notch (4136) forms a water inlet of the water absorption area (40).

8. The volute structure of a water pump of claim 2, wherein: the cross section of the flow guide channel (413) forms a smoothly curved applied structure (4135) at the outer edge of the corresponding partition plate (43).

9. The volute structure of a water pump according to any one of claims 1 to 8, wherein: the water outlet (422) is arranged on the side wall of the lower shell (4) and is tangentially connected with the third accommodating cavity (42) through a guide pipeline (423).

10. A volute structure for a water pump according to any one of claims 1-8, wherein: the second accommodating cavity (41) is divided into a first section (41a), a second section (41b) and a third section (41c) from bottom to top along the water flow direction, the lower end of the first section (41a) is arranged corresponding to the flow guide channel (413), the second section (41b) is smoothly connected with the first section (41a) and the inner diameter of the second section is gradually reduced, and the third section (41c) is smoothly connected with the second section (41b) and the inner diameter of the third section is gradually increased.

11. The volute structure of a water pump of claim 10, wherein: the bottom wall of the upper shell (3) is provided with a third water inlet (34) which is arranged corresponding to the first accommodating cavity (31), the third water inlet (34) is butted with the upper end of a third section (41c) of the second accommodating cavity (41), the third section (41c) forms a guide part which smoothly transits and connects the inner wall of the second accommodating cavity (41) and the inner bottom wall of the first accommodating cavity (31), and the outer edge of the guide part (412) is arranged close to the inner edge of the third water inlet (34).

12. A volute structure for a water pump according to any one of claims 1-8, wherein: the outer peripheral wall of the upper part of the lower shell (4) is provided with a support ring (44) extending along the radial direction, and the upper shell (3) is restrained on the support ring (44).

13. The volute structure of a water pump of claim 12, wherein: be provided with rand (441) on the upper wall of lock ring (44), be provided with on the diapire of last casing (3) and pass rand (441) with rotating and arrange and with rand (441) diapire looks joint spacing card foot (33).

14. A dual pump system using a volute structure of a water pump according to any one of claims 1 to 13, wherein: comprises that

The volute structure of the water pump;

the upper part of the upper impeller (1) is rotatably arranged in the first accommodating cavity (31) and is used for dispersing water in the first accommodating cavity (31) and spraying the water out of the spray hole (32); the lower part of the upper impeller (1) is rotatably arranged in the second accommodating cavity (41) and is used for drawing water into the second accommodating cavity (41) through the first water inlet (411) and conveying the water to the first accommodating cavity (31); and

and the lower impeller (2) is rotatably arranged in the third accommodating cavity (42) and is used for drawing water into the third accommodating cavity (42) through the second water inlet (421) and outputting the water through the water outlet (422).

15. The dual pump system of claim 14, wherein: the lower impeller (2) comprises a shaft (21) positioned in the center, an end cover (22) and blades (23), wherein the end cover (22) extends outwards gradually from the upper portion of the shaft (21) along the radial direction, the blades (23) are arranged on the lower wall surface of the end cover (22), in the assembly completion state, the end cover (22) is close to the inner top wall of the third accommodating cavity (42), and the lower edges of the blades (23) are arranged close to the second water inlet (421).

16. A cleaning machine using the double pump system according to claim 13 or 14, comprising a tank (6) and a water supply pipe (7) for supplying water from the bottom of the tank (6) upwards, characterized in that: the lower shell (4) is restricted on the inner bottom wall of the box body (6) and the water outlet (422) is connected with the lower end of the water supply pipeline (7).

17. The cleaning machine of claim 16, wherein: the water supply pipeline (7) is internally provided with a first branch pipeline (71) and a second branch pipeline (72) which are relatively independent, the first branch pipeline (71) is used for conveying water flow to the middle of the box body (6), and the second branch pipeline (72) is used for conveying water flow to the top of the box body (6).

18. The cleaning machine of claim 17, wherein: the bottom of the box body (6) is also provided with a shunt valve (8) used for controlling whether the first branch pipeline (71) and the second branch pipeline (72) circulate or not, a water inlet of the shunt valve (8) is connected with a water outlet (422) of the lower shell (4), a first water outlet (422) of the shunt valve is connected with the input end of the first branch pipeline (71), and a second water outlet (422) of the shunt valve is connected with the input end of the second branch pipeline (72).

19. The cleaning machine of claim 16, wherein: the bottom of the box body (6) is provided with a slag basket (9), and the first water inlet (411) and the second water inlet (421) are both arranged close to the slag basket (9).

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