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

Abstract

The present invention relates to a volute structure of a water pump and its application. The volute structure of the water pump includes an upper housing and a lower housing. The upper housing has a first accommodation cavity for installing the upper part of the first power component. The upper part of the lower housing has a second accommodation cavity for installing the lower part of the first power component. A first water inlet for water to enter the second accommodation cavity is provided on the side of the lower housing, and a third accommodation cavity for installing the second power component is provided at the lower part of the lower housing. A second water inlet for water to enter the third accommodation cavity and a water outlet for outputting water from the third accommodation cavity are provided on the side of the lower housing. The present invention provides an open volute structure. The second accommodation cavity and the first accommodation cavity supply water by bottom spraying, and the third accommodation cavity supplies water by top and / or middle spraying. Since the power of the two-way water flow is independently supplied by the corresponding pumps, the head and water flow rate of each water flow are improved, which is beneficial to improving the cleaning effect. Moreover, the upper housing and the lower housing are easy to disassemble and assemble, and the upper housing and the lower housing can be cleaned to avoid bacterial growth.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and specifically refers to a volute structure of a water pump, a dual-pump system applying the volute structure of the water pump, and a cleaning machine. Background Art

[0002] For tabletop and cabinet dishwashers, due to their large washing space, in order to achieve better washing effects, generally three spray arms, namely a top spray arm, a middle spray arm, and a bottom spray arm, are designed; during operation, a washing pump conveys water through a pipeline to the top, middle, and bottom spray arms, and the water sprays out from the top, middle, and bottom spray arms and flushes the tableware and then falls back into a water cup at the bottom of the dishwasher. The washing pump conveys the fallen water to the top, middle, and bottom spray arms again to complete a cycle.

[0003] For example, the Chinese patent application for invention "Energy-saving Dishwasher" (application number: CN201611232345.5) with the publication number of CN106859563A discloses a structure, which includes a cavity for accommodating tableware and providing a washing space, a spray system for spraying water to wash the tableware, and a pump body for pumping water and supplying water to the spray system; the spray system is arranged in the cavity; the water intake end of the pump body is communicated with the cavity, and the water supply end is communicated with the spray system; the spray system includes an inner water pipe and more than two sets of spray devices, and the more than two sets of spray devices are respectively arranged on the inner water pipe; a water distribution device is connected to the water supply end of the pump body, and the water distribution device is provided with more than two water outlets corresponding to the more than two sets of spray devices, and the spray devices are communicated with the corresponding water outlets; during operation, the water distribution device conducts one or more water outlets according to instructions, so that more than one set of spray devices perform washing work.

[0004] In the above-mentioned existing dishwashers that can perform bottom spraying and top spraying, the pump for supplying water to the spray system generally adopts a closed structure, that is, the volute of the washing pump is arranged below the box body, an impeller capable of rotating is arranged in the volute, the water inlet of the washing pump volute is communicated with the bottom of the washing cavity, and a water distribution device is connected to the water outlet of the volute. The water distribution device divides the water flow into a first branch for supplying water to the bottom spray arm and a second branch for supplying water to the top spray arm. Since the water pressure of the top spraying water and the bottom spraying water is independently supplied by the washing pump, the head, flow rate, and impact force of the water flow on each branch after diversion are greatly reduced, affecting the cleaning effect; at the same time, the closed volute fixed below the box body is difficult to disassemble and clean, and bacteria will breed due to residue accumulation after long-term use, which not only affects the washing effect but also gives users a bad experience.

[0005] In addition, the volute structure of the water pump directly affects the water supply capacity of the pump, and the volute in the prior art is already relatively mature, and it is impossible to increase the water head and flow rate of the water flow without changing the volute structure of the water pump. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a volute structure of a water pump that is conducive to increasing the lift and water flow rate of water, thereby improving the cleaning effect, in view of the current situation of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a double-pump system applying the volute structure of the above-mentioned water pump. The double-pump system provides power for two-way washing water separately to increase the lift and water flow rate, thereby improving the cleaning effect, in view of the current situation of the prior art.

[0008] The third technical problem to be solved by the present invention is to provide a double-pump system that uses an open volute to facilitate disassembly, assembly and cleaning, in view of the current situation of the prior art.

[0009] The fourth technical problem to be solved by the present invention is to provide a cleaning machine applying the above-mentioned double-pump system, in view of the current situation of the prior art.

[0010] The technical solution adopted by the present invention to solve at least one of the above technical problems is as follows: A volute structure of a water pump, comprising:

[0011] An upper housing having a first accommodation cavity for installing the upper part of the first power component, and spray holes are formed on the top wall and / or side wall of the upper housing and are in fluid communication with the first accommodation cavity; and

[0012] A lower housing connected to the lower part of the upper housing. The upper part of the lower housing has a second accommodation cavity for installing the lower part of the first power component. The second accommodation cavity is in communication with the first accommodation cavity. A first water inlet for water to enter the second accommodation cavity is formed on the side of the lower housing. The lower part of the lower housing has a third accommodation cavity for installing the second power component. A second water inlet for water to enter the third accommodation cavity and an outlet for outputting water from the third accommodation cavity are formed on the side of the lower housing.

[0013] In the above solution, a partition for separating the second accommodation cavity and the third accommodation cavity into relatively independent cavities is provided in the middle of the lower housing. Making the second accommodation cavity and the third accommodation cavity relatively independent is convenient for supplying water to the lower spray, top and / or middle spray respectively, reducing the fluid disturbance between them, avoiding the "water robbing" problem caused by suction distribution, reducing the capacity loss, so as to increase the water flow lift, water flow rate and spraying force.

[0014] As an improvement, a diversion channel is provided on the side of the lower housing above the partition and extending downward along the periphery of the partition from top to bottom. A separator is also provided in the lower housing above the partition, and the edge of the separator extends along the diversion channel to divide the diversion channel into a relatively independent upper diversion channel and a lower diversion channel. The lower port of the upper diversion channel forms the first water inlet, the lower port of the lower diversion channel forms the second water inlet, and a water inlet communicating with the lower diversion channel is formed on the top wall of the partition. With the above structure, the water supply between the second accommodation cavity and the third accommodation cavity is realized through the diversion channel, and the waterway structure is simple, which is beneficial to reducing energy loss and improving the head and water flow of each waterway.

[0015] Preferably, the diversion channel has a first side wall and a second side wall tangentially connected to the outer edge of the water inlet. The first side wall and the second side wall are arranged oppositely, and the distance between the two gradually decreases along the water flow direction. This structure is beneficial to pressurize the water flow during the water diversion process to increase the head, and the tangential connection method is beneficial to reducing energy loss.

[0016] Preferably, the lower housing includes a first housing having a second accommodation cavity and a second housing having a third accommodation cavity. The top of the second housing forms the partition, and a V-shaped card slot arranged around the periphery of the water inlet is provided on the top wall of the partition. The water inlet is located at the inner end of the V-shaped card slot, and the bottom edge of the second housing is inserted and connected with the V-shaped card slot. This structure is not only beneficial to reducing energy loss but also convenient for assembly.

[0017] Preferably, the cross-section of the diversion channel forms a smooth curved ︵ shape at the outer edge corresponding to the partition. This structure is beneficial to further reducing energy loss.

[0018] Preferably, the cross-section at the lower port of the diversion channel forms an arc structure that arches gradually from bottom to top and from inside to outside. The lower end of the separator is arranged corresponding to the middle of the arc structure, so that the lower port of the lower diversion channel is lower than the lower port of the upper diversion channel. This structure is convenient for controlling the height of the water suction port. The height of the water suction port determines the water consumption of the water flow system and the operation stability. When the water suction port is higher than the water surface, the water pump will entrain air when sucking water, making the water pump unable to operate normally; the volute also needs to have a sufficient water suction cross-sectional area, otherwise the local flow rate is too fast, which is easy to cause large energy loss and lead to a decrease in the local liquid level and inhalation of gas; with the above structure in the present invention, the water suction port is controlled at a position close to the bottom of the volute and is always below the liquid level, avoiding inhalation of gas and affecting the head.

[0019] Preferably, the third accommodation cavity is generally disc-shaped, and the water outlet is opened on the side wall of the lower housing and is tangentially connected to the third accommodation cavity through a guiding pipe. This structure is beneficial to reducing the energy loss of the water flow output from the third accommodation cavity.

[0020] Preferably, the second accommodating chamber is located above the partition and extends vertically. The second accommodating chamber is divided into a first section, a second section and a third section from bottom to top along the direction of water flow. The first section corresponds to the peripheral arrangement of the water inlet, the second section is smoothly connected to the first section and the inner diameter gradually decreases, and the third section is smoothly connected to the second section and the inner diameter gradually increases. The upper end of the guide channel corresponds to the second section and the third section and has a smooth transition at the connection. The above structure is conducive to cooperating with the corresponding impeller to improve the water flow extraction effect, thereby increasing the head and water flow.

[0021] Preferably, a third water inlet corresponding to the first accommodating chamber is formed on the bottom wall of the upper shell, and the third water inlet is connected to the upper end of the third section of the second accommodating chamber, and the third section constitutes a guide portion for smoothly transitioning the inner wall of the second accommodating chamber to the inner bottom wall of the first accommodating chamber, and the outer edge of the guide portion is arranged close to the inner edge of the third water inlet. This structure is conducive to reducing the energy loss of water flow in the process of entering the first accommodating chamber from the second accommodating chamber.

[0022] In order to facilitate assembly, a support ring extending in the radial direction is provided on the outer peripheral wall of the upper part of the lower shell, and the upper shell is constrained on the support ring. A clamping ring is provided on the upper wall surface of the support ring, and a clamping foot that can rotatably pass through the clamping ring and is clamped and limited with the bottom wall of the clamping ring is provided on the bottom wall of the upper shell, so that the upper shell is detachably connected to the top of the lower shell.

[0023] A dual pump system using the volute structure of the water pump comprises:

[0024] The volute structure of the water pump;

[0025] an upper impeller, wherein the upper portion of the upper impeller is rotatably disposed in the first accommodating chamber, and is used to disperse the water in the first accommodating chamber and spray it out from the spray hole; the lower portion of the upper impeller is rotatably disposed in the second accommodating chamber, and is used to draw water into the second accommodating chamber through the first water inlet and transport it to the first accommodating chamber; and

[0026] The lower impeller is rotatably disposed in the third accommodating chamber and is used to draw water into the third accommodating chamber through the second water inlet and output water through the water outlet.

[0027] Preferably, the lower impeller includes a shaft located in the center, an end cover extending gradually outward in the radial direction from the lower part of the shaft, and blades arranged on the upper wall of the end cover. A mounting opening is opened on the bottom wall of the lower shell, and the end cover is rotatably arranged in the mounting opening. With such a structure, the lower volute water pump can form a self-priming effect, avoiding the problem of difficulty in starting and air suction, which is conducive to improving the head and water flow.

[0028] Preferably, the cross section of the end cover is formed as a concave arc surface extending in the radial direction, and the blades are centrifugal blades distributed at intervals on the upper wall surface of the end cover.

[0029] A cleaning machine using the above-mentioned dual pump system includes a box body and a water supply pipe that can transport water at the bottom of the box body upwards, characterized in that the lower shell is constrained on the bottom wall of the box body and the water outlet is connected to the lower end of the water supply pipe.

[0030] Preferably, the water supply pipe has a relatively independent first branch pipe and a second branch pipe, the first branch pipe is used to deliver water to the middle of the box, and the second branch pipe is used to deliver water to the top of the box. With such a structure, spraying of the lower, middle and top layers can be achieved, which is conducive to improving the cleaning effect.

[0031] Preferably, a water-dividing valve for controlling the circulation of the first branch pipe and the second branch pipe is also provided at the bottom of the box body. The water inlet of the water-dividing valve is connected to the water outlet of the lower shell body, the first water outlet of the water-dividing valve is connected to the input end of the first branch pipe, and the second water outlet of the water-dividing valve is connected to the input end of the second branch pipe. This structure is convenient for controlling the use status of the middle layer and the top layer spraying as needed. For example, the first branch pipe can be closed and the second branch pipe can be opened to spray only the top layer; the first branch pipe can also be opened and the second branch pipe can be closed to spray only the middle layer to meet more usage requirements.

[0032] Preferably, a slag basket is provided at the bottom of the box body, and the first water inlet and the second water inlet are both arranged close to the slag basket. This structure is conducive to improving the slag collection effect.

[0033] Compared with the prior art, the advantages of the present invention are as follows: the present invention provides an open volute structure, wherein the second accommodating chamber and the first accommodating chamber located at the upper part are used for bottom spray water supply, and the third accommodating chamber located at the lower part is used for top and / or middle spray water supply. Since the power of the two water flows is independently supplied by the corresponding pumps, the head and water flow rate of each water flow are improved, which is beneficial to improving the cleaning effect; and the upper shell body and the lower shell body are easy to disassemble and assemble. The upper shell body can be removed from the lower shell body, and the upper shell body and the lower shell body can be cleaned to avoid bacterial growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the volute structure of a water pump according to an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the structure from another angle;

[0036] Figure 3 for Figure 1 A cross-sectional view of

[0037] Figure 4 It is an exploded view of the lower housing in the embodiment of the present invention;

[0038] Figure 5 is Figure 4 a schematic structural view of the first housing in the middle;

[0039] Figure 6 It is a cross-sectional view of the double-pump system in the embodiment of the present invention;

[0040] Figure 7 It is a schematic partial structural view of the cleaning machine in the embodiment of the present invention. Specific embodiments

[0041] The present invention will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0042] The volute structure of the water pump in this embodiment is applicable to a double-pump system, that is, a pump system that can provide bidirectional power. The double-pump system can be applied to a relatively large dishwasher to supply water for bottom spraying, top spraying, and / or middle spraying. Of course, it is not limited to this usage environment.

[0043] As Figures 1 to 7 shown, the volute structure of the water pump in this embodiment includes an upper housing 3 and a lower housing 4. The upper housing 3 has a body extending in the length direction. The central part of the body has a first accommodating cavity 31 for installing the upper part of the first power component. Flow channels communicating with the first accommodating cavity 31 are respectively provided on both sides of the body. Spray holes 32 communicating with the flow channels are opened on the top wall of the upper housing 3. The lower housing 4 is connected below the upper housing 3. The upper part of the lower housing 4 has a second accommodating cavity 41 for installing the lower part of the first power component. The second accommodating cavity 41 communicates with the first accommodating cavity 31 correspondingly. A first water inlet 411 for water to enter the second accommodating cavity 41 is opened on the side of the lower housing 4; the lower part of the lower housing 4 has a third accommodating cavity 42 for installing the second power component. A second water inlet 421 for water to enter the third accommodating cavity 42 and a water outlet 422 for outputting water from the third accommodating cavity 42 are opened on the side of the lower housing 4.

[0044] A partition 43 for separating the second accommodating cavity 41 and the third accommodating cavity 42 into relatively independent cavities is provided in the middle of the above-mentioned lower housing 4. Making the second accommodating cavity 41 and the third accommodating cavity 42 relatively independent is convenient for supplying water to the lower spray, top, and / or middle spray respectively, reducing the fluid disturbance between them, avoiding the problem of "grabbing water" caused by suction distribution, reducing the ability loss, so as to improve the water flow head, water flow rate, and spraying force.

[0045] Specifically, a diversion channel 413 is provided on the side of the lower housing 4 above the partition 43 and extending downward along the periphery of the partition 43 from top to bottom. A partition piece 424 is further provided in the lower housing 4 above the partition 43 and extending along the diversion channel 413 at the edge to divide the diversion channel 413 into relatively independent upper diversion channels 4131 and lower diversion channels 4132. The lower port of the upper diversion channel 4131 constitutes the first water inlet 411, and the lower port of the lower diversion channel 4132 constitutes the second water inlet 421. A water inlet 431 communicating with the lower diversion channel 4132 is opened on the top wall of the partition 43. With the above structure, the water supply between the second accommodating cavity 41 and the third accommodating cavity 42 is realized through the diversion channel 413. The water path structure is simple, which is beneficial to reducing energy loss and improving the head and water flow of each water path.

[0046] The above-mentioned diversion channel 413 has a first side wall 4133 and a second side wall 4134 tangentially connected to the outer edge of the water inlet 431. The first side wall 4133 and the second side wall 4134 are arranged oppositely and the distance between the two gradually decreases along the water flow direction, so that the diversion channel 413 is a V-shaped structure when viewed from above. This structure is beneficial to pressurize the water flow during the water guiding process to increase the head, and the tangential connection method is beneficial to reducing energy loss.

[0047] The lower housing 4 of this embodiment includes a first housing 4a having a second accommodating cavity 41 and a second housing 4b having a third accommodating cavity 42. The top of the second housing 4b constitutes the above-mentioned partition 43. A V-shaped card slot 432 is arranged on the top wall of the partition 43 around the periphery of the water inlet 431. The water inlet 431 is located at the inner end of the V-shaped card slot 432, and the bottom edge of the second housing 4b is inserted and connected with the V-shaped card slot 432. This structure is not only beneficial to reducing energy loss, but also convenient for assembly.

[0048] The cross-section of the above-mentioned diversion channel 413 forms a smooth curved ︵-shaped structure 4135 at the outer edge corresponding to the partition 43. This structure is beneficial to further reducing energy loss. The cross-section at the lower port of the diversion channel 413 forms an arc-shaped structure 4136 that arches upward from bottom to top and from inside to outside. The lower end of the partition piece 424 is arranged corresponding to the middle of the arc-shaped structure 4136 so that the lower port of the lower diversion channel 4132 is lower than the lower port of the upper diversion channel 4131. This structure facilitates controlling the height of the water suction port. The height of the water suction port determines the water consumption and operation stability of the water flow system. When the water suction port is higher than the water surface, the water pump will entrain air during water suction, making the water pump unable to operate normally; the volute also needs to have a sufficient water suction cross-sectional area, otherwise the local flow rate is too fast, which is likely to cause large energy loss, resulting in a local liquid level drop and gas inhalation; the present invention adopts the above structure to control the water suction port at the bottom near the volute, always below the liquid level, to avoid gas inhalation and affect the head.

[0049] The third accommodating chamber 42 of this embodiment is substantially disc-shaped, and the water outlet 422 is provided on the side wall of the second housing 4b and is tangentially connected to the third accommodating chamber 42 through a guide pipe 423. This structure is conducive to reducing the capacity loss of the third accommodating chamber to output water flow.

[0050] The second accommodation chamber 41 of this embodiment is located above the partition 424 and extends vertically. The second accommodation chamber 41 is divided into a first section 41a, a second section 41b and a third section 41c from bottom to top along the direction of water flow. The first section 41a corresponds to the peripheral arrangement of the water inlet 431, the second section 41b is smoothly connected to the first section 41a and the inner diameter gradually decreases, and the third section 41c is smoothly connected to the second section 41b and the inner diameter gradually increases. The upper end of the guide channel 413 corresponds to the side arrangement of the second section 41b and the third section 41c and has a smooth transition at the connection. The above structure is conducive to cooperating with the corresponding impeller to improve the water flow extraction effect, thereby increasing the head and water flow.

[0051] In this embodiment, the bottom wall of the upper shell 3 is provided with a third water inlet 34 arranged corresponding to the first accommodating chamber 31, and the third water inlet 34 is connected to the upper end of the third section 41c of the second accommodating chamber 41, and the third section 41c constitutes a guide portion for smoothly transitioning the inner wall of the second accommodating chamber 41 and the inner bottom wall of the first accommodating chamber 31, and the outer edge of the guide portion is arranged close to the inner edge of the third water inlet 34. This structure is conducive to reducing the energy loss of water flow in the process of entering the first accommodating chamber 31 from the second accommodating chamber 41.

[0052] In order to facilitate assembly, a support ring 44 extending in the radial direction is provided on the outer peripheral wall of the upper part of the lower shell 4, and the upper shell 3 is constrained on the support ring 44. A clamping ring 441 is provided on the upper wall surface of the support ring 44, and a clamping foot 33 is provided on the bottom wall of the upper shell 3, which can be rotatably arranged through the clamping ring 441 and is clamped and limited with the bottom wall of the clamping ring 441, so that the upper shell 3 is detachably connected to the top of the lower shell 4.

[0053] The dual pump system of the present embodiment using the volute structure of the water pump comprises the volute structure of the water pump, the upper impeller 1, the lower impeller 2 and the driving member 5. The upper impeller 1 has a first axis located in the center and a plurality of first blades spaced circumferentially and extending axially on the circumference of the first axis. The upper portion of the first blade is a centrifugal blade and the lower portion is an axial flow blade. The upper portion of the upper impeller 1 is rotatably disposed in the first accommodating chamber 31, and is used to disperse the water in the first accommodating chamber 31 and spray it out from the spray hole 32; the lower portion of the upper impeller 1 is rotatably disposed in the second accommodating chamber 41, and is used to draw water into the second accommodating chamber 41 through the first water inlet 411 and transport it to the first accommodating chamber 31. The lower impeller 2 is rotatably disposed in the third accommodating chamber 42, and is used to draw water into the third accommodating chamber 42 through the second water inlet 421 and output it through the water outlet 422.

[0054] The lower impeller 2 described above includes a shaft 21 at the center, an end cover 22 that gradually extends radially outward from the lower part of the shaft 21, and blades 23 provided on the upper wall surface of the end cover 22. An installation opening 45 is formed on the bottom wall of the second housing 4b, and the end cover 22 is rotatably provided in the installation opening 45. The cross-section of the end cover 22 is formed as a concave arc surface extending radially, and the blades 23 are centrifugal blades that are spaced apart on the upper wall surface of the end cover 22. With such a structure, a self-priming effect can be formed in the lower volute pump, avoiding problems such as difficult startup and air suction, which is beneficial to improving the head and water flow rate.

[0055] In this embodiment, as Figure 7 shown, the cleaning machine applying the above double-pump system includes a box body 6 and a water supply pipe 7 that can convey the water at the bottom of the box body 6 upward. The lower housing 4 is constrained on the inner bottom wall of the box body 6, and the water outlet 422 is connected to the lower end of the water supply pipe 7. The driving member 5 is a motor, which is provided at the outer bottom of the box body 6, and the output shaft 51 is arranged upward. The output shaft 51 passes through the lower housing 4 of the box body 6 from bottom to top and extends into the first accommodation cavity 31 of the upper housing 3 and is respectively connected to the lower impeller 2 and the upper impeller 1 for driving the upper impeller 1 and the lower impeller 2 to rotate.

[0056] The water supply pipe 7 has relatively independent first branch pipes 71 and second branch pipes 72. The first branch pipe 71 is used to convey water flow to the middle part of the box body, and the second branch pipe 72 is used to convey water flow to the top of the box body. With such a structure, spraying on the lower layer, middle layer, and top layer is realized, which is beneficial to improving the cleaning effect.

[0057] A water distribution valve 8 for controlling the flow of the first branch pipe 71 and the second branch pipe 72 is further provided at the bottom of the box body 6. The water inlet of the water distribution valve 8 is connected to the water outlet 422 of the lower housing 4. The first water outlet of the water distribution valve 8 is connected to the input end of the first branch pipe 71, and the second water outlet of the water distribution valve 8 is connected to the input end of the second branch pipe 72. This structure facilitates controlling the use states of spraying on the middle layer and the top layer as needed. For example, the first branch pipe 71 can be closed and the second branch pipe 72 can be opened for only top-layer spraying; or the first branch pipe 71 can be opened and the second branch pipe 72 can be closed for only middle-layer spraying to meet more usage requirements.

[0058] A slag basket 9 is provided at the bottom of the box body 6, and both the first water inlet 411 and the second water inlet 421 are arranged close to the slag basket 9. This structure is beneficial to improving the slag collection effect.

[0059] During use, the output shaft 51 of the driving member 5 rotates, driving the upper impeller 1 and the lower impeller 2 to rotate. The axial flow blades at the lower part of the upper impeller 1 suck water from the first water inlet 411 into the second accommodating cavity 41 and convey it upward to the first accommodating cavity 31. The water in the first accommodating cavity 31 is ejected 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 cavity 42 and conveys it to the water supply pipe 7 through the guiding pipe 423 in the circumferential direction via the water outlet 422. The water supply pipe 7 conveys the water flow upward for top and / or middle spraying.

[0060] In the description and claims of the present invention, directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc. are used to describe various exemplary structural parts and elements of the present invention. However, these terms are used here only for the purpose of convenient description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these directional terms are used only as illustrations and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0061] As used in the present invention, "fluid communication" refers to the spatial position relationship between two components or parts (hereinafter uniformly referred to as the first part and the second part respectively), that is, fluid (gas, liquid or a mixture of both) can flow or / and be transported from the first part along the flow path to the second part. It can be that the first part and the second part are directly connected, or the first part and the second part are indirectly connected through at least one third party. The third party can be a fluid passage such as a pipe, a channel, a conduit, a guiding member, a hole, a groove, etc., or a chamber allowing fluid to flow through or a combination thereof.

Claims

1. A dual-pump system for a cleaning machine, including a volute structure of a water pump, characterized in that: The volute structure of the water pump includes an upper housing (3) having a first accommodation cavity (31) for mounting the upper part of the first power component, and a spray hole (32) communicating with the first accommodation cavity (31) is formed on the top wall and / or side wall of the upper housing (3); and a lower housing (4) connected below the upper housing (3), the upper part of the lower housing (4) having a second accommodation cavity (41) for mounting the lower part of the first power component, the second accommodation cavity (41) communicating with the first accommodation cavity (31), a first water inlet (411) for allowing water to enter the second accommodation cavity (41) being formed on the side of the lower housing (4), the lower part of the lower housing (4) having a third accommodation cavity (42) for mounting the second power component, a second water inlet (421) for allowing water to enter the third accommodation cavity (42) and a water outlet (422) for outputting water from the third accommodation cavity (42) being formed on the side of the lower housing (4); The double-pump system further includes: an upper impeller (1), the upper part of the upper impeller (1) being rotatably disposed in the first accommodation cavity (31) for dispersing the water in the first accommodation cavity (31) and spraying it out through the spray hole (32); the lower part of the upper impeller (1) being rotatably disposed in the second accommodation cavity (41) for sucking water into the second accommodation cavity (41) through the first water inlet (411) and delivering it to the first accommodation cavity (31); and a lower impeller (2) rotatably disposed in the third accommodation cavity (42) for sucking water into the third accommodation cavity (42) through the second water inlet (421) and outputting it through the water outlet (422); a partition plate (43) is provided in the middle of the lower housing (4) for separating the second accommodation cavity (41) and the third accommodation cavity (42) into relatively independent cavities; a diversion channel (413) is provided on the side of the lower housing (4) above the partition plate (43) and extending downward along the periphery of the partition plate (43) from top to bottom, the diversion channel (413) having a first side wall (4133) and a second side wall (4134) tangentially connected to the outer edge of the water inlet (431), the first side wall (4133) and the second side wall (4134) being oppositely arranged and the distance between the two gradually decreasing along the water flow direction; the lower housing (4) includes a first housing (4a) having the second accommodation cavity (41) and a second housing (4b) having the third accommodation cavity (42), the top of the second housing (4b) forming the partition plate (43), a V-shaped card slot (432) arranged around the periphery of the water inlet (431) being provided on the top wall of the partition plate (43), the water inlet (431) being located at the inner end of the V-shaped card slot (432), and the bottom edge of the second housing (4b) being inserted and connected with the V-shaped card slot (432); The dual-pump system is an open dual-pump system arranged in the cleaning machine housing. The second accommodating chamber and the first accommodating chamber are used for bottom spray water supply, and the third accommodating chamber is used for top and / or middle spray water supply; the upper impeller and the lower impeller rotate, and the axial flow blades at the lower part of the upper impeller suck water from the first water inlet into the second accommodating chamber and transport it upward to the first accommodating chamber. The water in the first accommodating chamber is sprayed out through the spray hole under the action of the upper part of the upper impeller; the lower impeller sucks water from the second water inlet into the third accommodating chamber, and transports it to the water supply pipe through the water outlet in the circumferential direction. The water supply pipe transports the water flow upward and provides top and / or middle spraying for the cleaning machine.

2. The double-pump system of the cleaning machine according to claim 1, characterized in that: The lower shell (4) is also provided with a partition plate (424) which is located above the partition (43) and extends along the guide channel (413) at its edge so as to separate the guide channel (413) into relatively independent upper guide channel (4131) and lower guide channel (4132); the lower port of the upper guide channel (4131) constitutes the first water inlet (411), and the lower port of the lower guide channel (4132) constitutes the second water inlet (421); and a water inlet (431) which is connected to the lower guide channel (4132) is formed on the top wall of the partition (43).

3. The dual-pump system of the cleaning machine according to claim 2, characterized in that: The cross section of the guide channel (413) forms a smoothly curved U-shaped structure (4135) at the outer edge of the corresponding partition (43).

4. The double-pump system of the washing machine according to claim 3, characterized in that: The cross section at the lower end of the guide channel (413) forms an arc structure (4136) that gradually rises from bottom to top and from inside to outside, and the lower end of the separator (424) is arranged corresponding to the middle of the arc structure (4136) so that the lower end of the lower guide channel (413) is lower than the lower end of the upper guide channel (4131).

5. The dual-pump system of the cleaning machine according to claim 1, wherein: The third accommodating chamber (42) is substantially disc-shaped, and the water outlet (422) is provided on the side wall of the lower shell (4) and is tangentially connected to the third accommodating chamber (42) via a guide pipe (423).

6. The dual pump system of the cleaning machine according to claim 2, wherein: The second accommodating chamber (41) is located above the partition plate (424) and extends vertically. The second accommodating chamber (41) is divided into a first section (41a), a second section (41b) and a third section (41c) from bottom to top along the direction of water flow. The first section (41a) corresponds to the outer periphery of the water inlet (431). The second section (41b) is smoothly connected to the first section (41a) and the inner diameter gradually decreases. The third section (41c) is smoothly connected to the second section (41b) and the inner diameter gradually increases.

7. The dual-pump system of the cleaning machine according to claim 6, characterized in that: A third water inlet (34) is provided on the bottom wall of the upper shell (3) and is arranged corresponding to the first accommodating chamber (31). The third water inlet (34) is connected to the upper end of the third section (41c) of the second accommodating chamber (41). The third section (41c) constitutes a guide portion for smoothly transitioning the inner wall of the second accommodating chamber (41) to the inner bottom wall of the first accommodating chamber (31). The outer edge of the guide portion (412) is arranged close to the inner edge of the third water inlet (34).

8. The double-pump system of the cleaning machine according to claim 1, wherein: A support ring (44) extending radially is provided on the outer peripheral wall of the upper part of the lower housing (4), and the upper housing (3) is constrained on the support ring (44).

9. The dual-pump system of the cleaning machine according to claim 8, characterized in that: A snap ring (441) is provided on the upper wall surface of the support ring (44), and a snap foot (33) is provided on the bottom wall of the upper housing (3) which is rotatably arranged through the snap ring (441) and is snap-connected and limited to the bottom wall of the snap ring (441).

10. The double-pump system of the cleaning machine according to any one of claims 1 to 9, characterized in that: The lower impeller (2) includes a shaft (21) at the center, an end cover (22) gradually extending radially outward from the lower part of the shaft (21), and blades (23) provided on the upper wall surface of the end cover (22). An installation opening (45) is formed in the bottom wall of the lower housing (4), and the end cover (22) is rotatably arranged in the installation opening (45).

11. The dual-pump system of the cleaning machine according to claim 10, wherein: The cross section of the end cover (22) is formed as a concave arc surface extending radially, and the blades (23) are centrifugal blades distributed at intervals on the upper wall surface of the end cover (22).

12. A cleaning machine applying the double-pump system according to any one of claims 1 to 11, comprising a box body (6) and a water supply pipe (7) capable of conveying the water at the bottom of the box body (6) upward, characterized in that: The lower housing (4) is constrained on the inner bottom wall of the box body (6), and the water outlet (422) is connected to the lower end of the water supply pipe (7).

13. The cleaning machine according to claim 12, wherein: The water supply pipe (7) has relatively independent first branch pipes (71) and second branch pipes (72). The first branch pipe (71) is used to convey water flow to the middle of the box body (6), and the second branch pipe (72) is used to convey water flow to the top of the box body (6).

14. The cleaning machine according to claim 13, characterized in that: A water distribution valve (8) for controlling the flow of the first branch pipe (71) and the second branch pipe (72) is further provided at the bottom of the box body (6). The water inlet of the water distribution valve (8) is connected to the water outlet (422) of the lower housing (4). The first water outlet of the water distribution valve is connected to the input end of the first branch pipe (71), and the second water outlet of the water distribution valve is connected to the input end of the second branch pipe (72).

15. The washing machine according to claim 12, wherein: A slag basket (9) is provided at the bottom of the box body (6), and both the first water inlet (411) and the second water inlet (421) are arranged close to the slag basket (9).

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