A water pump volute structure and double pump system, 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 shell and a lower shell. The upper shell has a first accommodating chamber for installing the upper part of a first power component. The upper part of the lower shell has a second accommodating chamber for installing the lower part of the first power component. The side of the lower shell is provided with a first water inlet for supplying water into the second accommodating chamber, and the lower part has a third accommodating chamber for installing the second power component. The bottom of the lower shell is provided with a second water inlet for supplying water into the third accommodating chamber. The present invention provides a volute structure of an open water pump. 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. Since the power of the two water flows is independently supplied by the corresponding pumps, the head and water flow of each water flow are improved, which is conducive to improving the cleaning effect. In addition, the upper shell and the lower shell are easy to disassemble and assemble, and the upper shell and the lower shell can be cleaned to avoid bacterial growth.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and in particular to a volute structure of a water pump and a double pump system and a washing machine using the volute structure of the water pump. Background Art

[0002] For desktop and cabinet dishwashers, since the washing space is large, in order to achieve a better washing effect, they are generally designed with three spray arms: top, middle and lower. When working, the washing pump transports water to the top, middle and lower spray arms through pipes. The water is sprayed out from the top, middle and lower spray arms and rinses the dishes before falling back into the water cup at the bottom of the dishwasher. The washing pump transports the fallen water to the top, middle and lower spray arms again to complete a cycle.

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

[0004] In the above-mentioned existing dishwashers capable of bottom spraying and top spraying, the pump used to supply water to the spray system generally adopts a closed structure, that is, the volute of the washing pump is arranged below the housing, a rotatable impeller is arranged inside the volute, the water inlet of the washing pump volute is connected to the bottom of the washing chamber, and the water outlet of the volute is connected to a water diversion device, which 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 water for top spraying and the water for bottom spraying are 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 housing is difficult to disassemble and clean, and after long-term use, it will breed bacteria due to the accumulation of residues, which not only affects the washing effect but also causes a bad experience for users.

[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 relatively mature, and the water head and flow rate cannot be increased when the volute structure of the water pump remains unchanged. 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 beneficial to increasing the head and water flow of water flow and thus improving the cleaning effect in view of the current status of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a dual pump system with a volute structure of the above-mentioned water pump in view of the current status of the prior art. The dual pump system provides power for two washing water routes separately to increase the head and water flow rate and thus improve the cleaning effect.

[0008] The third technical problem to be solved by the present invention is to provide a dual pump system which adopts an open volute to facilitate disassembly, assembly and cleaning in view of the current status of the prior art.

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

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

[0011] An upper shell body having a first accommodating chamber for mounting the upper portion of the first power component, wherein a spray hole in fluid communication with the first accommodating chamber is formed on the top wall and / or the side wall of the upper shell body; and

[0012] The lower shell is connected to the bottom of the upper shell, and the upper part of the lower shell has a second accommodating chamber for installing the lower part of the first power component, and the second accommodating chamber is communicated with the first accommodating chamber. The side of the lower shell is provided with a guide channel extending obliquely downward, and the lower port of the guide channel forms a first water inlet for supplying water into the second accommodating chamber; the lower part of the lower shell has a third accommodating chamber 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 chamber, and the side is provided with a water outlet for supplying water from the third accommodating chamber.

[0013] In the above solution, a partition is provided in the middle of the lower shell for separating the second accommodating chamber and the third accommodating chamber into relatively independent chambers. The second accommodating chamber and the third accommodating chamber are relatively independent, which is convenient for supplying water to the lower spray, top and / or middle spray respectively, reduces fluid disturbance between each other, avoids the problem of "water grabbing" caused by suction distribution, reduces capacity loss, and improves water head, water flow and spraying force.

[0014] Preferably, the guide channel is located above the partition and extends downward from top to bottom along the periphery of the partition so that the first water inlet is arranged close to the bottom edge of the lower shell. This structure is conducive to reducing the height of the water inlet, avoiding the inhalation of air, and allowing the pump to quickly inhale water.

[0015] Preferably, the third accommodating chamber is roughly disc-shaped, the second accommodating chamber is located above the partition and extends vertically, the diameter of the lower port of the second accommodating chamber is smaller than the diameter of the third accommodating chamber, a circular area corresponding to the lower port of the second accommodating chamber is arranged on the upper wall surface of the partition, and the diversion channel has a first side wall and a second side wall tangentially connected to the outer edge of the circular area, the first side wall and the second side wall are arranged oppositely and the distance between them gradually decreases along the flow direction of the water. This structure is conducive to pressurizing the water flow during the water diversion process to increase the head, and the tangential connection method is conducive to reducing energy loss.

[0016] Preferably, the lower shell includes a first shell having a second accommodating cavity and a second shell having a third accommodating cavity, the top of the second shell constitutes the partition, the top wall of the partition is provided with a V-shaped groove arranged around the periphery of the circular area, the circular area is located at the inner end of the V-shaped groove, and the bottom edge of the second shell is plugged and connected with the V-shaped groove. This structure is not only conducive to reducing energy loss, but also convenient for assembly.

[0017] In the present invention, the second water inlet is provided on the bottom wall of the second shell, and a V-shaped guide groove is also provided on the bottom wall of the second shell surrounding the periphery of the second water inlet and arranged corresponding to the V-shaped slot, and the outer edge of the guide channel extends downward and docks with the outer end of the V-shaped guide groove to enclose a water absorption area. The V-shaped guide groove can rectify and guide the water entering the second water inlet, and the water absorption area formed by the outer shell of the guide channel and the V-shaped guide groove can limit the water absorption position, thereby avoiding energy damage caused by water flow turbulence.

[0018] It is further preferred that an arc-shaped notch that arches upward is formed at the outer edge of the lower port of the diversion channel, and the arc-shaped notch constitutes the water inlet of the water absorption area. In the assembled state, the bottom edges of the V-shaped diversion groove and the diversion channel are against the inner bottom wall of the dishwasher. The arc-shaped notch is provided for water flow to be sucked in, and the water absorption inlet is controlled at a very low position, which not only makes it easy to start the water pump, but also avoids the problem of air inhalation; in addition, the present invention arranges the water inlet corresponding to the side wall of the dishwasher slag basket, which can improve the slag collection effect with the help of the water absorption force, and at the same time, the bottom of the volute and the side wall of the slag basket are rinsed to keep them clean.

[0019] Preferably, the cross section of the flow guiding channel forms a smoothly curved U-shaped structure at the outer edge of the corresponding partition. This structure is conducive to further reducing energy loss.

[0020] Preferably, the water outlet is opened on the side wall of the lower shell and is tangentially connected to the third accommodating chamber through a guide pipe. This structure is conducive to reducing the capacity loss of the third accommodating chamber to output water flow.

[0021] Preferably, 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 is arranged corresponding to the guide channel, the second section is smoothly connected to the first section and the inner diameter is gradually reduced, and the third section is smoothly connected to the second section and the inner diameter is gradually expanded. The upper end of the guide channel is arranged corresponding 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.

[0022] 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.

[0023] 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.

[0024] A dual pump system using the volute structure of the water pump comprises:

[0025] The volute structure of the water pump;

[0026] 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

[0027] 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.

[0028] Preferably, the lower impeller includes a centrally located shaft, an end cover extending gradually radially outward from the upper portion of the shaft, 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 chamber, and the lower edge of the blade is arranged close to the second water inlet.

[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 a volute structure of an open water pump, 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 and the lower shell are easy to disassemble and assemble. The upper shell can be removed from the lower shell, and the upper shell and the lower shell 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 Schematic diagram of the bottom structure;

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

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

[0038] Figure 5 This is a schematic structural diagram of a first housing according to an embodiment of the present invention;

[0039] Figure 6 A cross-sectional view of a dual pump system according to an embodiment of the present invention;

[0040] Figure 7 It is a partial structural schematic diagram of a cleaning machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below with reference to the accompanying drawings.

[0042] The volute structure of the water pump of this embodiment is suitable for a dual pump system, that is, a pump system that can provide bidirectional power. The dual pump system can be used in larger dishwashers to supply water for bottom spraying, top spraying and / or middle spraying, and is of course not limited to this use environment.

[0043] like Figures 1 to 7 As shown, the volute structure of the water pump of this embodiment includes an upper shell 3 and a lower shell 4. The upper shell 3 has a body extending in the length direction. The central part of the body has a first accommodating chamber 31 for installing the upper part of the first power component. Both sides of the body have flow channels connected to the first accommodating chamber 31. The top wall of the upper shell 3 is provided with a spray hole 32 connected to the flow channel. The lower shell 4 is connected to the lower part of the upper shell 3. The upper part of the lower shell 4 has a second accommodating chamber 41 for installing the lower part of the first power component. The second accommodating chamber 41 is correspondingly connected to the first accommodating chamber 31. The side of the lower shell 4 is provided with a first water inlet 411 for supplying water into the second accommodating chamber 41; the lower part of the lower shell 4 has a third accommodating chamber 42 for installing the second power component. The bottom of the lower shell 4 is provided with a second water inlet 421 for supplying water into the third accommodating chamber 42, and the side is provided with a water outlet 422 for supplying water from the third accommodating chamber 42.

[0044] A partition 43 is provided in the middle of the lower shell 4 for separating the second accommodating chamber 41 and the third accommodating chamber 42 into relatively independent chambers. The second accommodating chamber 41 and the third accommodating chamber 42 are relatively independent, so as to facilitate water supply for the lower spray, the top and / or the middle spray, respectively, reduce fluid disturbance between each other, avoid the problem of "water grabbing" caused by suction distribution, reduce capacity loss, and improve water head, water flow and spraying force.

[0045] Specifically, the side of the lower shell 4 is provided with a guide channel 413 extending obliquely downward, and the lower end of the guide channel 413 forms a first water inlet 411 for supplying water into the second accommodating chamber 41. The guide channel 413 is located above the partition 43 and extends downward from top to bottom along the outer periphery of the partition 43 so that the first water inlet 411 is arranged close to the bottom edge of the lower shell 4. This structure is conducive to reducing the height of the water suction port, avoiding the inhalation of air, and enabling the pump to quickly inhale water.

[0046] The third accommodation chamber 42 of this embodiment is roughly disc-shaped, the second accommodation chamber 41 is located above the partition 43 and extends vertically, the diameter of the lower port of the second accommodation chamber 41 is smaller than the diameter of the third accommodation chamber 42, and a circular area 400 corresponding to the lower port of the second accommodation chamber 41 is arranged on the upper wall surface of the partition 43, and the diversion channel 413 has a first side wall 4133 and a second side wall 4134 tangentially connected to the outer edge of the circular area 400. The first side wall 4133 and the second side wall 4134 are arranged oppositely and the distance between them gradually decreases along the flow direction of the water flow, so that the diversion channel 413 is a V-shaped structure from a top view. This structure is conducive to pressurizing the water flow during the water diversion process to increase the head, and the tangential connection method is conducive to reducing energy loss.

[0047] The lower shell 4 of this embodiment includes a first shell 4a having a second accommodating cavity 41 and a second shell 4b having a third accommodating cavity 42. The top of the second shell 4b constitutes the above-mentioned partition 43. The top wall of the partition 43 is provided with a V-shaped groove 432 arranged around the periphery of the circular area 400. The circular area 400 is located at the inner end of the V-shaped groove 432. The bottom edge of the second shell 4b is plugged and connected with the V-shaped groove 432. This structure is not only conducive to reducing energy loss, but also convenient for assembly.

[0048] In this embodiment, the second water inlet 421 is provided on the bottom wall of the second shell 4b, and a V-shaped guide groove 433 is also provided on the bottom wall of the second shell 4b, which surrounds the periphery of the second water inlet 421 and is arranged corresponding to the V-shaped groove 432. The outer edge of the guide channel 413 extends downward and docks with the outer end of the V-shaped guide groove 433 to enclose a water absorption area 40. The V-shaped guide groove 433 can rectify and guide the water entering the second water inlet 421, and the water absorption area 40 formed by the outer shell of the guide channel 413 and the V-shaped guide groove 433 can limit the water absorption position, thereby avoiding energy damage caused by water flow turbulence.

[0049] An arc-shaped notch 4136 that arches upward is formed at the outer edge of the lower port of the above-mentioned guide channel 413, and the arc-shaped notch 4136 constitutes the water inlet of the water absorption area 40. In the assembled state, the bottom edges of the above-mentioned V-shaped guide groove 433 and the guide channel 413 are both against the inner bottom wall of the dishwasher. The above-mentioned arc-shaped notch 4136 is provided for water flow to be sucked in, and the water absorption inlet is controlled at a very low position, which not only makes it easy to start the water pump, but also avoids the problem of air inhalation; in addition, in this embodiment, the above-mentioned water inlet is arranged at the side wall of the dishwasher slag basket 9, which can improve the slag collection effect by means of the water absorption force, and at the same time, the bottom of the volute and the side wall of the slag basket 9 are washed to keep them clean.

[0050] 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, which is conducive to further reducing energy loss.

[0051] The water outlet 422 of this embodiment 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 beneficial to reducing the capacity loss of the third accommodating chamber to output water flow.

[0052] The second accommodating chamber 41 of this embodiment 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 circular area 400, 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.

[0053] 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.

[0054] 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.

[0055] The dual pump system of this embodiment includes 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 part of the first blade is a centrifugal blade and the lower part is an axial flow blade. The upper part of the upper impeller 1 is rotatably arranged 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 part of the upper impeller 1 is rotatably arranged 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 arranged 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.

[0056] The above-mentioned lower impeller 2 includes a shaft 21 located in the center, an end cover 22 extending gradually radially outward from the upper part of the shaft 21, and a blade 23 arranged on the lower wall surface of the end cover 22. In the assembled state, the end cover 22 is arranged close to the inner top wall of the third accommodating chamber 42, and the lower edge of the blade 23 is arranged close to the second water inlet 421.

[0057] In this embodiment, if Figure 7 As shown, the cleaning machine using the above-mentioned dual pump system includes a box body 6 and a water supply pipe 7 capable of conveying water at the bottom of the box body 6 upwards, the lower shell 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 arranged at the outer bottom of the box body 6, and the output shaft 51 is arranged upwards. The output shaft 51 passes through the lower shell 4 of the box body 6 from bottom to top and extends into the first accommodating chamber 31 of the upper shell 3 and is respectively connected to the lower impeller 2 and the upper impeller 1, and is used to drive the upper impeller 1 and the lower impeller 2 to rotate.

[0058] The water supply pipe 7 has a relatively independent first branch pipe 71 and a second branch pipe 72. The first branch pipe 71 is used to deliver water to the middle of the box, and the second branch pipe 72 is used to deliver water to the top of the box. With such a structure, spraying of the lower, middle and top layers is achieved, which is conducive to improving the cleaning effect.

[0059] The bottom of the box body 6 is also provided with a water diverter valve 8 for controlling the circulation of the first branch pipe 71 and the second branch pipe 72. The water inlet of the water diverter valve 8 is connected to the water outlet 422 of the lower shell 4, the first water outlet of the water diverter valve 8 is connected to the input end of the first branch pipe 71, and the second water outlet of the water diverter valve 8 is connected to the input end of the second branch pipe 72. 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 71 can be closed and the second branch pipe 72 can be opened to spray only the top layer; the first branch pipe 71 can also be opened and the second branch pipe 72 can be closed to spray only the middle layer to meet more use needs.

[0060] A slag basket 9 is disposed at the bottom of the box body 6 , and the first water inlet 411 and the second water inlet 421 are both arranged close to the slag basket 9 . This structure is beneficial to improving the slag collecting effect.

[0061] When in 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 chamber 41 and transport it upward to the first accommodating chamber 31. The water in the first accommodating chamber 31 is sprayed out through the spray hole 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 transports it to the water supply pipe 7 through the water outlet 422 along the guide pipe 423 in the circumferential direction. The water supply pipe 7 transports the water flow upward for top and / or middle spraying.

[0062] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0063] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A dual pump system for a cleaning machine, characterized in that: It includes a volute structure, the volute structure includes An upper shell (3) having a first accommodating chamber (31) for mounting the upper portion of the first power component, and a spray hole (32) in fluid communication with the first accommodating chamber (31) is formed on the top wall and / or the side wall of the upper shell (3); and A lower shell (4) is connected to the lower part of the upper shell (3); the upper part of the lower shell (4) is provided with a second accommodating chamber (41) for mounting the lower part of the first power component; the second accommodating chamber (41) is communicated with the first accommodating chamber (31); the side of the lower shell (4) is provided with a guide channel (413) extending obliquely downward; the lower end of the guide channel (413) forms a first water inlet (411) for supplying water into the second accommodating chamber (41); The lower part of the lower shell (4) has a third accommodating chamber (42) for installing a second power component, the bottom of the lower shell (4) is provided with a second water inlet (421) for supplying water into the third accommodating chamber (42), and the side is provided with a water outlet (422) for supplying water out of the third accommodating chamber (42); the middle part of the lower shell (4) is provided with a partition (43) for separating the second accommodating chamber (41) and the third accommodating chamber (42) into relatively independent chambers; 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 water flow direction; the lower end of the first section (41a) is arranged corresponding to the guide channel (413); the second section (41b) is smoothly connected to the first section (41a) and the inner diameter is gradually reduced; the third section (41c) is smoothly connected to the second section (41b) and the inner diameter is gradually increased; Also includes: an upper impeller (1), the upper portion of the upper impeller (1) being rotatably disposed in the first accommodating chamber (31) for dispersing water in the first accommodating chamber (31) and spraying the water out from the spray hole (32); the lower portion of the upper impeller (1) being rotatably disposed in the second accommodating chamber (41) for drawing water into the second accommodating chamber (41) through the first water inlet (411) and transporting the water to the first accommodating chamber (31); and 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 the water through the water outlet (422), and transport the water to the water supply pipe (7) through the water outlet (422) along the guide pipe in the circumferential direction, and the water supply pipe (7) transports the water flow upward for top and / or middle spraying.

2. The dual pump system for a cleaning machine according to claim 1, characterized in that: The guide channel (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 arranged close to the bottom edge of the lower shell (4).

3. The dual pump system for a cleaning machine according to claim 2, characterized in that: The third accommodating chamber (42) is roughly disc-shaped, the second accommodating chamber (41) is located above the partition and extends vertically, the diameter of the lower port of the second accommodating chamber (41) is smaller than the diameter of the third accommodating chamber (42), and a circular area (400) corresponding to the lower port of the second accommodating chamber (41) is arranged on the upper wall surface of the partition (43), and the guide channel (413) has a first side wall (4133) and a second side wall (4134) tangentially connected to the outer edge of the circular area (400), and the first side wall (4133) and the second side wall (4134) are arranged relatively to each other and the distance between them gradually decreases along the direction of water flow.

4. The dual pump system for a cleaning machine according to claim 3, characterized in that: The lower shell (4) comprises a first shell (4a) having a second accommodating cavity (41) and a second shell (4b) having a third accommodating cavity (42); the top of the second shell (4b) constitutes the partition (43); a V-shaped groove (432) arranged around the periphery of the circular area (400) is provided on the top wall of the partition (43); the circular area (400) is located at the inner end of the V-shaped groove (432); and the bottom edge of the second shell (4b) is plugged and connected to the V-shaped groove (432).

5. The dual pump system for a cleaning machine according to claim 4, characterized in that: The second water inlet (421) is provided on the bottom wall of the second shell (4b); the bottom wall of the second shell (4b) is also provided with a V-shaped guide groove (433) surrounding the periphery of the second water inlet (421) and arranged corresponding to the V-shaped groove (432); the outer edge of the guide channel (413) extends downward and butts with the outer end of the V-shaped guide groove (433) to enclose a water absorption area (40).

6. The dual pump system for a cleaning machine according to claim 5, characterized in that: An upwardly arched arc-shaped notch (4136) is formed at the outer edge of the lower port of the diversion channel (413), and the arc-shaped notch (4136) constitutes the water inlet of the water absorption area (40).

7. The dual pump system for a cleaning machine according to claim 1, 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).

8. The dual pump system for a cleaning machine according to any one of claims 1 to 7, characterized in that: 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).

9. The dual pump system for a cleaning machine according to any one of claims 1 to 7, 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).

10. The dual pump system for a cleaning machine according to any one of claims 1 to 7, characterized in that: A support ring (44) extending in the radial direction is arranged 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).

11. The dual pump system for a cleaning machine according to claim 10, characterized in that: A clamping ring (441) is arranged on the upper wall surface of the support ring (44), and a clamping foot (33) is arranged on the bottom wall of the upper shell (3) and can be rotatably passed through the clamping ring (441) and is clamped and limited with the bottom wall of the clamping ring (441).

12. The dual pump system for a cleaning machine according to any one of claims 1 to 7, characterized in that: The lower impeller (2) comprises a shaft (21) located at the center, an end cover (22) extending gradually outward in a radial direction from the upper portion of the shaft (21), and blades (23) arranged on the lower wall surface of the end cover (22); in an assembled state, the end cover (22) is arranged close to the inner top wall of the third accommodating chamber (42), and the lower edge of the blade (23) is arranged close to the second water inlet (421).

13. A cleaning machine, comprising a box (6) and a water supply pipe (7) capable of conveying water from the bottom of the box (6) upward, characterized in that: The dual pump system according to claim 12 is applied, wherein the lower shell (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).

14. The cleaning machine according to claim 13, characterized in that: The water supply pipe (7) comprises a relatively independent first branch pipe (71) and a second branch pipe (72); the first branch pipe (71) is used to transport water to the middle of the box (6), and the second branch pipe (72) is used to transport water to the top of the box (6).

15. The cleaning machine according to claim 14, characterized in that: A water diverter valve (8) for controlling whether the first branch pipe (71) and the second branch pipe (72) are circulated is also provided at the bottom of the box body (6); the water inlet of the water diverter valve (8) is connected to the water outlet (422) of the lower shell body (4); the first water outlet (422) of the water diverter valve is connected to the input end of the first branch pipe (71); and the second water outlet (422) of the water diverter valve is connected to the input end of the second branch pipe (72).

16. The cleaning machine according to claim 13, characterized in that: A slag basket (9) is provided at the bottom of the box body (6), 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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