A water flow system and a cleaning machine applying the water flow system

Abstract

The present invention relates to a water flow system and a cleaning machine applying the water flow system, which includes a spraying device and a pump for supplying water to the spraying device. The spraying device includes a bottom spraying arm, a middle spraying arm, and a top spraying arm. The pump includes an upper impeller, a lower impeller, an upper housing, and a lower housing. The upper housing has a first accommodating cavity for installing the upper part of the first blade. The upper part of the lower housing has a second accommodating cavity for installing the lower part of the first blade. A first water inlet for water to enter the second accommodating cavity is formed on the side wall of the lower housing. The lower part of the lower housing has a third accommodating cavity for installing the lower impeller. A second water inlet and a water outlet are formed on the side wall and / or the bottom wall of the lower housing. The present invention uses an open double-pump system for 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 increased, which is beneficial to improving the cleaning effect. The double-pump system of the present invention is convenient for disassembly, cleaning, and can avoid the growth of bacteria.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and in particular to a water flow system and a washing machine using the water flow system. 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 the water flow system of existing dishwashers, the bottom spray arm is generally located in the central part and above the filter screen, and the slag collection basket is located beside the bottom spray arm. When collecting slag, the water flows back by itself, first filtered through the filter screen, and then collected by the slag collection basket before being discharged. During the drainage process, due to the excessively fast flow rate of water on the filter screen, small residues are easily left on the filter screen, while the slag collection basket has a poor slag collection effect. In addition, the excessively fast flow rate of water on the filter screen causes the water flow rate through the slag collection basket to be slow, affecting the smoothness of slag discharge. At the same time, small pollutants are easily adhered to the side wall of the slag collection basket, making it difficult to clean. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a water flow system which can provide power for two washing water routes respectively, thereby increasing the head and water flow rate 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 water flow system which adopts an open volute so as to facilitate disassembly, assembly and cleaning in view of the current status of the prior art.

[0008] The third technical problem to be solved by the present invention is to provide a cleaning machine with the above-mentioned water flow system in view of the current status of the prior art, which can improve the smoothness of slag discharge and the cleanliness of the slag basket.

[0009] The technical solution adopted by the present invention to solve the above technical problems is: a water flow system, including a spray device and a pump for supplying water to the spray device, characterized in that: the spray device includes:

[0010] Bottom spray arm for spraying water upwards;

[0011] A middle spray arm, disposed above the bottom spray arm, for spraying water to the upper area of ​​the bottom spray arm;

[0012] A top spray arm is disposed above the middle spray arm and is used to spray water to the upper or side areas of the top spray arm;

[0013] The pump comprises:

[0014] An upper impeller has a first shaft located at the center and first blades distributed at intervals in the circumferential direction on the circumference of the first shaft and extending in the axial direction;

[0015] A lower impeller having a second shaft located at the center and second blades distributed at intervals along the circumferential direction on the circumference of the second shaft;

[0016] An upper shell having a first accommodating cavity for mounting the upper portion of the first blade, a spray hole in fluid communication with the first accommodating cavity is formed on the top wall and / or the side wall of the upper shell, and the upper shell constitutes the bottom spray arm; and

[0017] The lower housing is connected below the upper housing. The upper part of the lower housing has a second accommodation cavity for installing the lower part of the first blade. A first water inlet for water to enter the second accommodation cavity is formed on the side wall of the lower housing. The lower part of the lower housing has a third accommodation cavity for installing the lower impeller. A second water inlet for water to enter the third accommodation cavity and a water outlet for output from the third accommodation cavity are formed on the side wall and / or the bottom wall of the lower housing.

[0018] In the above solution, a partition is provided in the middle of the lower housing to separate the second accommodation cavity and the third accommodation cavity into relatively independent cavities. This makes the second accommodation cavity and the third accommodation cavity relatively independent, facilitating the supply of water to the lower spray by the upper impeller and the supply of water to the top and / or middle spray by the lower impeller respectively, reducing the fluid disturbance between them, minimizing the energy loss, and thus improving the water flow head, water flow rate and jet force.

[0019] Preferably, the third accommodation cavity is located below the partition and is generally disc-shaped. The second water inlet is formed on the bottom wall of the lower housing, and the water outlet is formed 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 accommodation cavity is located above the partition and extends vertically. The inner diameter of the second accommodation cavity is smaller than that of the third accommodation cavity and is adapted to the lower part of the first blade. This structure is beneficial to reducing the energy loss of the water flow when flowing through the second accommodation cavity.

[0021] Preferably, a transversely extending ∩-shaped enclosing plate is provided on the top wall of the partition. The enclosing plate and the partition together enclose a water inlet channel communicating with the second accommodation cavity, and the outer port of the water inlet channel constitutes the first water inlet. Adopting such a structure not only facilitates production and manufacturing, but also places the water inlet channel at the bottom of the second accommodation cavity, which is beneficial to reducing the water flow disturbance and further reducing the energy loss of the water flow when flowing through the second accommodation cavity.

[0022] For the convenience of assembly, a radially extending support plate is provided on the outer peripheral wall of the upper part of the lower housing, and the upper housing is constrained on the support plate. A snap ring is provided on the upper wall surface of the support plate, and a snap foot is provided on the bottom wall of the upper housing. The snap foot rotatably passes through the snap ring and is clamped and limited to the bottom wall of the snap ring, thereby detachably connecting the upper housing to the top of the lower housing.

[0023] Preferably, a third water inlet is provided on the bottom wall of the upper shell body corresponding to the first accommodating chamber, and the third water inlet is connected to the upper end of the second accommodating chamber. The diameter of the third water inlet is larger than the inner diameter of the second accommodating chamber, and the inner diameter of the upper part of the lower shell body gradually expands near the upper end of the second accommodating chamber to form a guide portion that can smoothly transition and connect with the inner bottom wall of the first accommodating chamber. 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.

[0024] Preferably, the outer edge of the guide portion is arranged close to the inner edge of the third water inlet, and a baffle extending radially and supported on the bottom wall of the upper shell is provided on the outer peripheral wall of the guide portion, and the outer edge of the baffle corresponds to the inner edge of the clamping foot. This structure is conducive to improving the sealing performance at the third water inlet and preventing water leakage from affecting the head of the bottom spray.

[0025] In the present invention, the upper part of the first blade is a centrifugal blade, and the lower part is an axial flow blade; the second blade is a centrifugal blade.

[0026] In each of the above schemes, the dual pump system further includes a driving member for driving the upper impeller and the lower impeller to rotate. The driving member is arranged below the lower housing and the output shaft is arranged upward. The output shaft passes through the lower housing from bottom to top and extends into the first accommodating cavity of the upper housing and is connected to the lower impeller and the upper impeller respectively. With this structure, a dual pump system is constructed with one power source, which simplifies the overall structure and reduces production costs, and is more convenient for controlling the water supply.

[0027] Preferably, the output shaft is radially limited with the upper impeller and the lower impeller respectively, and a nut capable of preventing the upper impeller from moving axially along the output shaft is provided at the upper end of the output shaft. The above structure is convenient for disassembly and assembly. After removing the upper housing from the clamping ring, the nut can be unscrewed to remove the upper impeller, and the upper cavity of the upper housing, the upper impeller and the lower housing can be cleaned to avoid bacterial growth and improve the cleaning effect.

[0028] A cleaning machine using the above-mentioned water flow system includes a box body and a water supply pipe that can transport water at the bottom of the box body upward to the middle spray arm and the top spray arm, 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.

[0029] Preferably, the water supply pipeline has a relatively independent first branch pipeline and a second branch pipeline, the water outlet of the first branch pipeline is connected to the water inlet of the middle spray arm, and the water outlet of the second branch pipeline is connected to the water inlet of the top spray arm. With such a structure, spraying of the lower layer, middle layer and top layer is achieved, which is conducive to improving the cleaning effect.

[0030] Preferably, a water distribution valve for controlling the flow of the first branch pipe and the second branch pipe is further provided at the bottom of the box body. The water inlet of the water distribution valve is connected to the water outlet of the lower housing. The first water outlet of the water distribution valve is connected to the input end of the first branch pipe, and the second water outlet of the water distribution valve is connected to the input end of the second branch pipe. This structure facilitates controlling the usage status of the middle-layer and top-layer spraying according to needs. For example, the first branch pipe can be closed and the second branch pipe can be opened for only top-layer spraying; or the first branch pipe can be opened and the second branch pipe can be closed for only middle-layer spraying to meet more usage requirements.

[0031] Preferably, a partition plate capable of dividing the inner cavity of the box body into an upper cavity and a lower cavity that are relatively independent up and down is provided in the middle of the box body. The bottom spraying arm is located at the bottom of the lower cavity, the middle spraying arm is located in the middle or upper part of the lower cavity, and the top spraying arm is located in the upper cavity. With such a structure, it is convenient to spray and clean the lower cavity or the upper and lower cavities according to needs to meet more requirements of consumers.

[0032] Preferably, the water supply pipe is arranged close to the inner side wall of the box body. The top spraying arm includes a first spraying arm extending from the water supply pipe towards the middle of the box body and a second spraying arm located above the first spraying arm and close to the inner side wall of the box body. The first spraying arm is located at the bottom of the upper cavity and is used for spraying water upwards, and the second spraying arm is located in the middle or upper part of the upper cavity and is used for spraying water towards the area above the first spraying arm. This structure is beneficial to eliminating the cleaning dead corners in the upper cavity and improving the cleaning effect in the upper cavity.

[0033] Preferably, a sunken water draining area is provided at the bottom of the box body. The top of the water draining area is covered with a filter mesh plate. Both the first water inlet and the second water inlet are located below the filter mesh plate. A slag collecting basket is installed on the filter mesh plate. The bottom of the slag collecting basket is located in the water draining area and is arranged close to the first water inlet. A suction nozzle that extends obliquely downwards and corresponds to the side wall of the slag collecting basket is connected to the first water inlet. This structure is beneficial to increasing the water flow rate at the slag collecting basket, thereby slowing down the water flow rate on the filter mesh plate, avoiding the accumulation of fine residues on the filter mesh plate, and improving the slag collecting effect. At the same time, the suction nozzle increasing the water flow rate at the side wall of the slag collecting basket can also scour the side wall of the slag collecting basket to improve the cleanliness of the slag collecting basket.

[0034] Compared with the prior art, the advantages of the present invention are as follows: The present invention uses an open double-pump system for water supply. Among them, the second accommodating cavity, the first accommodating cavity and the upper impeller located in the upper part supply water for bottom spraying, and the third accommodating cavity and the lower impeller located in the lower part supply water for top and / or middle spraying. 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; The double-pump system of the present invention is convenient for disassembly and assembly. By removing the upper housing from the lower housing, the upper housing, the upper impeller and the lower housing can be cleaned to avoid the growth of bacteria. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic structural diagram of the pump in the embodiment of the present invention;

[0036] Figure 2 is Figure 1 a schematic structural diagram from another angle;

[0037] Figure 3 is a cross-sectional view of the pump in the embodiment of the present invention;

[0038] Figure 4 is a schematic structural diagram of the lower housing in the embodiment of the present invention;

[0039] Figure 5 is Figure 4 a schematic structural diagram from another angle;

[0040] Figure 6 is a cross-sectional view of the lower housing in the embodiment of the present invention;

[0041] Figure 7 is a schematic structural diagram of the cleaning machine in the embodiment of the present invention;

[0042] Figure 8 is a cross-sectional view of the cleaning machine in the embodiment of the present invention;

[0043] Figure 9 is Figure 8 a partial enlarged view. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The present invention will be further described in detail below with reference to the embodiments of the drawings.

[0045] The water flow system of this embodiment is mainly used in a relatively large cleaning machine for cleaning dishes.

[0046] As Figures 1 to 9 shown, the water flow system of this embodiment includes a spraying device a and a pump b for supplying water to the spraying device a.

[0047] Among them, the spray device a includes a bottom spray arm, a middle spray arm a1, and a top spray arm a2. The bottom spray arm is used to spray water upward. The middle spray arm a1 is arranged above the side of the bottom spray arm and is used to spray water into the area above the bottom spray arm. The top spray arm a2 is arranged above the middle spray arm a1 and is used to spray water into the area above or on the side of the top spray arm a2.

[0048] The pump b includes an upper impeller 1, a lower impeller 2, an upper housing 3, a lower housing 4, and a driving member 5. The upper impeller 1 has a first shaft 11 at the center and a plurality of first blades 12 that are circumferentially spaced and axially extended on the circumferential surface of the first shaft 11. The upper part of the first blade 12 is a centrifugal blade and the lower part is an axial flow blade. The lower impeller 2 has a second shaft 21 at the center and a plurality of second blades 22 that are circumferentially spaced on the circumferential surface of the second shaft 21. The second blade 22 is a centrifugal blade.

[0049] The upper housing 3 has a body extending in the length direction. The central part of the body has a first accommodation cavity 31 for installing the upper part of the first blade 12. Both sides of the body respectively have flow channels connected to the first accommodation cavity 31. Spray holes 32 connected to the flow channels are opened on the top wall of the upper housing 3. The upper housing 3 constitutes the above-mentioned bottom spray arm.

[0050] The lower housing 4 is connected below the upper housing 3. The upper part of the lower housing 4 has a second accommodation cavity 41 for installing the lower part of the first blade 12. A first water inlet 411 for water to enter the second accommodation cavity 41 is opened on the side wall of the lower housing 4. The lower part of the lower housing 4 has a third accommodation cavity 42 for installing the lower impeller 2. A second water inlet 421 for water to enter the third accommodation cavity 42 is opened on the bottom wall of the lower housing 4, and a water outlet 422 for water to be output from the third accommodation cavity 42 is opened on the side wall.

[0051] The driving member 5 is a motor, which is arranged below the lower housing 4 and the output shaft 51 is arranged upward. The output shaft 51 passes through the lower housing 4 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.

[0052] Specifically, as Figure 3 、 6 shown, a partition 43 for separating the second accommodation cavity 41 and the third accommodation cavity 42 into relatively independent cavities is provided in the middle of the lower housing 4. Making the second accommodation cavity 41 and the third accommodation cavity 42 relatively independent is convenient for respectively supplying water to the lower spray through the upper impeller 1 and supplying water to the top and / or middle spray through the lower impeller 2, reducing the fluid disturbance between them, reducing the energy loss, so as to improve the water head, water flow rate and spraying force.

[0053] The above-mentioned third accommodation cavity 42 is located below the partition plate 43 and is generally disc-shaped. The second water inlet 421 is opened at the center of the bottom wall of the lower housing 4. The water outlet 422 is tangentially connected to the third accommodation cavity 42 through a guiding pipe 423. This structure is beneficial to reducing the loss of the water output capacity of the third accommodation cavity 42.

[0054] The above-mentioned second accommodation cavity 41 is located above the partition plate 43 and extends vertically. The inner diameter of the second accommodation cavity 41 is smaller than that of the third accommodation cavity 42 and is adapted to the lower part of the first blade 12. This structure is beneficial to reducing the loss of the water flow capacity when the water flows through the second accommodation cavity 41.

[0055] As Figure 4 、 5 、shown in 6, a horizontally extending ∩-shaped enclosing plate 431 is arranged on the top wall of the above-mentioned partition plate 43. The enclosing plate 431 and the partition plate 43 together enclose a water inlet channel 432 communicating with the second accommodation cavity 41. The outer port of the water inlet channel 432 constitutes the first water inlet 411. Adopting such a structure is not only convenient for production and manufacturing, but also placing the water inlet channel 432 at the bottom of the second accommodation cavity 41 is beneficial to reducing the water flow disturbance and further reducing the loss of the water flow capacity when the water flows through the second accommodation cavity 42.

[0056] For the convenience of assembly, a radially extending support plate 44 is arranged on the outer peripheral wall of the upper part of the lower housing 4, and the upper housing 3 is constrained on the support plate 44. A snap ring 441 is arranged on the upper wall surface of the support plate 44. A snap foot 33 is arranged on the bottom wall of the upper housing 3 and is rotatably arranged through the snap ring 441 and is clamped and limited with the bottom wall of the snap ring 441, so as to detachably connect the upper housing 3 to the top of the lower housing 4.

[0057] As Figure 3 shown, a third water inlet 34 corresponding to the first accommodation cavity 31 is opened on the bottom wall of the upper housing 3. The third water inlet 34 is docked with the upper port of the second accommodation cavity 41. The diameter of the third water inlet 34 is larger than the inner diameter of the second accommodation cavity 41. The inner diameter of the upper part of the lower housing 4 gradually expands near the upper end of the second accommodation cavity 41 to form a guiding part 412 that can be smoothly transitionally connected to the inner bottom wall of the first accommodation cavity 31. This structure is beneficial to reducing the loss of the water flow capacity during the process of the water flowing from the second accommodation cavity 41 into the first accommodation cavity 31. The outer edge of the guiding part 412 is arranged close to the inner edge of the third water inlet 34. A baffle 413 extending radially is arranged on the outer peripheral wall of the guiding part 412 and is placed on the bottom wall of the upper housing 3. The outer edge of the baffle 413 is arranged corresponding to the inner edge of the snap foot 33. This structure is beneficial to improving the sealing performance at the third water inlet 34 and avoiding water leakage from affecting the lift of the bottom spray.

[0058] The output shaft 51 of this embodiment is radially limited to the upper impeller 1 and the lower impeller 2 respectively. A nut is provided at the upper end of the output shaft 51 to prevent the upper impeller 1 from moving axially along the output shaft 51. With the above structure, it is convenient for disassembly and assembly. After removing the upper housing 3 from the snap ring 441, unscrew the nut, and then the upper impeller 1 can be removed, and the cavities of the upper housing 3, the upper impeller 1, and the upper part of the lower housing 4 can be cleaned to avoid bacterial growth and improve the cleaning effect.

[0059] 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 capable of conveying 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 water supply pipe 7 has relatively independent first branch pipe 71 and second branch pipe 72. The water outlet end of the first branch pipe 71 is connected to the water inlet end of the middle spray arm a1, and the water outlet end of the second branch pipe 72 is connected to the water inlet end of the top spray arm a2. With such a structure, spraying on the lower layer, middle layer, and top layer is realized, which is beneficial to improving the cleaning effect.

[0060] 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 above 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 is convenient for controlling the use states of the middle layer and top layer spraying according to needs. 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.

[0061] A partition for separating the inner cavity of the box body 6 into an upper cavity and a lower cavity that are relatively independent up and down is provided in the middle of the box body 6. The bottom spray arm is located at the bottom of the lower cavity, the middle spray arm a1 is located in the middle or upper part of the lower cavity, and the top spray arm a2 is located in the upper cavity. With such a structure, it is convenient to spray and clean the lower cavity or the upper and lower cavities according to needs to meet more requirements of consumers.

[0062] The water supply pipe 7 is arranged close to the inner side wall of the box body 6. The top spray arm a2 includes a first spray arm a21 extending from the water supply pipe 7 towards the middle of the box body 6 and a second spray arm a22 located above the first spray arm a21 and close to the inner side wall of the box body 6. The first spray arm a21 is located at the bottom of the upper cavity and is used for spraying water upward, and the second spray arm a22 is located in the middle or upper part of the upper cavity and is used for spraying water to the area above the first spray arm a21. This structure is beneficial to eliminating the cleaning dead corners in the upper cavity and improving the cleaning effect in the upper cavity.

[0063] A water drainage area 60 which is concave is arranged at the bottom of the above-mentioned box body 6. A filter screen plate 601 covers the top of the water drainage area 60. Both the first water inlet 411 and the second water inlet 421 are located below the filter screen plate 601. A slag collecting basket 9 is installed on the filter screen plate 601. The bottom of the slag collecting basket 9 is located in the water drainage area 601 and is arranged close to the first water inlet 411. A suction nozzle 410 which extends obliquely downward and corresponds to the side wall of the slag collecting basket 9 is connected to the first water inlet 411. This structure is beneficial to improving the water flow speed at the slag collecting basket 9, thereby slowing down the water flow speed on the filter screen plate 601, avoiding the accumulation of fine residues on the filter screen plate 601, and improving the slag collecting effect. At the same time, the suction nozzle 410 increasing the water flow speed at the side wall of the slag collecting basket 9 can also flush the side wall of the slag collecting basket 9, improving the cleanliness of the slag collecting basket 9.

[0064] When using the cleaning machine of this embodiment, 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 first blade 12 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 first blade 12; the second blade 22 sucks water from the second water inlet 421 into the third accommodating cavity 42, and circumferentially conveys it to the water supply pipe 7 through the guiding pipe 423 via the water outlet 422. The water supply pipe 7 conveys the water flow upward for top and / or middle spraying. When draining water, it is sucked and discharged through the valve-pump integrated structure at the bottom of the box body under the slag collecting basket.

[0065] In the description and claims of the present invention, terms indicating directions such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc. are used to describe various 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 terms indicating directions are only for illustration 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 gravity direction.

[0066] 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, a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first part and / or be transported 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 flow guiding member, a hole, a groove, etc., or a chamber allowing the fluid to flow through or a combination of the above.

Claims

1. A water flow system, comprising a spraying device (a) and a pump (b) for supplying water to the spraying device (a), characterized in that: The spray device (a) includes: A bottom spray arm for spraying water upward; A middle spray arm (a1) provided above the side of the bottom spray arm for spraying water into the area above the bottom spray arm; A top spray arm (a2) provided above the middle spray arm (a1) for spraying water into the area above or to the side of the top spray arm (a2); The pump (b) includes: An upper impeller (1) having a first shaft (11) at the center and first blades (12) circumferentially spaced and axially extending on the circumferential surface of the first shaft (11); A lower impeller (2) having a second shaft (21) at the center and second blades (22) circumferentially spaced on the circumferential surface of the second shaft (21); An upper housing (3) having a first accommodation cavity (31) for mounting the upper part of the first blades (12), and spray holes (32) fluidly communicating with the first accommodation cavity (31) are formed in the top wall and / or side wall of the upper housing (3), and the upper housing (3) constitutes the bottom spray arm; and A lower housing (4) connected below the upper housing (3), the upper part of the lower housing (4) has a second accommodation cavity (41) for mounting the lower part of the first blades (12), the second accommodation cavity (41) communicates with the first accommodation cavity (31), a first water inlet (411) for water to enter the second accommodation cavity (41) is formed in the side wall of the lower housing (4), the lower part of the lower housing (4) has a third accommodation cavity (42) for mounting the lower impeller (2), and a second water inlet (421) for water to enter the third accommodation cavity (42) and a water outlet (422) output from the third accommodation cavity (42) are formed in the side wall and / or bottom wall of the lower housing (4); A partition plate (43) for separating the second accommodation cavity (41) and the third accommodation cavity (42) into relatively independent cavities is provided in the middle of the lower housing (4); a support plate (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 plate (44); The water flow system is an open double-pump system provided in the cleaning machine box. The second accommodation cavity and the first accommodation cavity supply water for bottom spraying, and the third accommodation cavity supplies water for top and / or middle spraying; the upper impeller and the lower impeller rotate. The axial flow blades at the lower part of the upper impeller suck water from the first water inlet into the second accommodation cavity and convey it upward to the first accommodation cavity, and the water in the first accommodation cavity is ejected through the spray holes under the action of the upper part of the upper impeller; the lower impeller sucks water from the second water inlet into the third accommodation cavity and outputs it to the water supply pipe in the circumferential direction, and the water supply pipe conveys the water flow upward and provides top and / or middle spraying for the cleaning machine.

2. The water flow system according to claim 1, wherein: The third accommodation cavity (42) is located below the partition plate (43) and is generally disc-shaped. The second water inlet (421) is formed in the bottom wall of the lower housing (4), and the water outlet (422) is formed in the side wall of the lower housing (4) and is tangentially connected to the third accommodation cavity (42) through a guiding pipe (423).

3. The water flow system according to claim 1, characterized in that: The second accommodating chamber (41) is located above the partition (43) and extends vertically; the inner diameter of the second accommodating chamber (41) is smaller than the inner diameter of the third accommodating chamber (42) and is adapted to the lower portion of the first blade (12).

4. The water flow system according to claim 3, wherein: A transversely extending ∩-shaped enclosure (431) is provided on the top wall of the partition (43), and the enclosure (431) and the partition (43) together enclose a water inlet channel (432) connected to the second accommodating chamber (41), and the outer port of the water inlet channel (432) constitutes the first water inlet (411).

5. The water flow system according to claim 1, wherein: A clamping ring (441) is provided on the upper wall surface of the support plate (44), and a clamping foot (33) is provided on the bottom wall of the upper shell (3) and is rotatably arranged through the clamping ring (441) and is clamped and limited with the bottom wall of the clamping ring (441).

6. The water flow system according to claim 1, characterized in that: A third water inlet (34) arranged corresponding to the first accommodating chamber (31) is formed on the bottom wall of the upper shell (3), and the third water inlet (34) is connected to the upper end of the second accommodating chamber (41).

7. The water flow system according to claim 6, characterized in that: The diameter of the third water inlet (34) is greater than the inner diameter of the second accommodating chamber (41), and the inner diameter of the upper portion of the lower shell (4) near the upper end of the second accommodating chamber (41) gradually expands to form a guide portion (412) that can smoothly transition and connect with the inner bottom wall of the first accommodating chamber (31).

8. The water flow system according to claim 7, wherein: The outer edge of the guide portion (412) is arranged close to the inner edge of the third water inlet (34), and a baffle (413) extending radially and supported on the bottom wall of the upper shell (3) is provided on the outer peripheral wall of the guide portion (412).

9. The water flow system according to any one of claims 1 to 8, characterized in that: The upper part of the first blade (12) is a centrifugal blade, and the lower part is an axial flow blade; the second blade (22) is a centrifugal blade.

10. The water flow system according to any one of claims 1 to 8, characterized in that: The invention also comprises a driving member (5) for driving the upper impeller (1) and the lower impeller (2) to rotate. The driving member (5) is arranged below the lower housing (4) and the output shaft (51) is arranged upward. The output shaft (51) passes through the lower housing (4) from bottom to top and extends into the first accommodating cavity (31) of the upper housing (3) and is respectively connected to the lower impeller (2) and the upper impeller (1).

11. The water flow system according to claim 10, wherein: The output shaft (51) is radially limited with the upper impeller (1) and the lower impeller (2) respectively, and a nut capable of preventing the upper impeller (1) from axially moving along the output shaft (51) is provided at the upper end of the output shaft (51).

12. A cleaning machine applying the water flow 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 to a middle spray arm (a1) and a top spray arm (a2), characterized in that: 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).

13. The washing machine according to claim 12, wherein: The water supply pipe (7) comprises a relatively independent first branch pipe (71) and a second branch pipe (72); the water outlet end of the first branch pipe (71) is connected to the water inlet end of the middle spray arm (a1), and the water outlet end of the second branch pipe (72) is connected to the water inlet end of the top spray arm (a2).

14. The washing 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 (422) of the water distribution valve is connected to the input end of the first branch pipe (71), and the second water outlet (422) of the water distribution valve is connected to the input end of the second branch pipe (72).

15. The cleaning machine according to claim 12, wherein: A partition plate that can divide the inner cavity of the box body (6) into an upper cavity and a lower cavity that are relatively independent up and down is provided in the middle of the box body (6). The bottom spray arm is located at the bottom of the lower cavity. The middle spray arm (a1) is located in the middle or upper part of the lower cavity. The top spray arm (a2) is located in the upper cavity.

16. The washing machine according to claim 15, characterized in that: The water supply pipe (7) is arranged close to the inner side wall of the box body (6). The top spray arm (a2) includes a first spray arm (a21) extending from the water supply pipe (7) towards the middle of the box body (6) and a second spray arm (a22) located above the first spray arm (a21) and close to the inner side wall of the box body (6). The first spray arm (a21) is located at the bottom of the upper cavity and is used to spray water upwards. The second spray arm (a22) is located in the middle or upper part of the upper cavity and is used to spray water towards the area above the first spray arm (a21).

17. The washing machine according to claim 12, characterized in that: A concave water drainage area (60) is provided at the bottom of the box body (6). The top of the water drainage area (60) is covered with a filter mesh plate (601). The first water inlet (411) and the second water inlet (421) are both located below the filter mesh plate (601). A slag collection basket (9) is installed on the filter mesh plate (601). The bottom of the slag collection basket (9) is located in the water drainage area (60) and is arranged close to the first water inlet (411). A suction nozzle (410) that extends obliquely downwards and corresponds to the side wall of the slag collection basket (9) is connected to the first water inlet (411).

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