Water flow system for a washing machine and washing machine

Abstract

The present application relates to a kind of water flow system for cleaning machine and cleaning machine, including volute, guide vane and centrifugal impeller, volute top has first water outlet, side has second water outlet;Guide vane is set in volute and separates the inner chamber of volute into upper cavity and lower cavity, first water outlet is connected with upper cavity, second water outlet is connected with lower cavity, the edge of guide vane is provided with water inlet for water from lower cavity into upper cavity into guide water port.The present application is provided with guide vane in volute, can be shunted to water, one way water after shunting is exported by the first water outlet of volute top, another way water is exported by the second water outlet of volute side, guide vane itself does not move, under the shunting effect of guide vane, eliminate the interference problem of two ways of water, reduce water flow energy loss, so that two ways of water can keep higher lift and larger water flow;The operation of the water flow system of the present application can be completed by relying on a centrifugal impeller, the overall structure is simple, and production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of dishwasher technology, specifically to a water flow system for a cleaning machine and a cleaning machine. Background Technology

[0002] For larger dishwashers, at least two sets of spray arms, arranged vertically, are typically used to achieve better washing results. During operation, the wash pump delivers water to each spray arm for vertical spraying. After rinsing the dishes, the water that falls back down collects in a water cup at the bottom of the dishwasher. The wash pump then delivers the fallen water back to each spray arm, completing one water circulation cycle.

[0003] For example, Chinese invention patent application CN106859563A, entitled "Energy-Saving Dishwasher" (application number: CN201611232345.5), discloses a structure that includes a cavity for accommodating tableware and providing a cleaning space, a spray system for spraying water to clean the tableware, and a pump for drawing water and supplying water to the spray system. The spray system is disposed within the cavity. The pump's suction end is connected to the cavity, and its supply end is connected to the spray system. The spray system includes an inner water pipe and two or more spray devices, each set of spray devices being disposed on the inner water pipe. The pump's supply end is connected to a water distribution device, which has two or more water outlets corresponding to the two or more spray devices, and the spray devices are connected to the corresponding water outlets. During operation, the water distribution device opens one or more water outlets according to instructions, enabling one or more spray devices to perform cleaning work.

[0004] In existing dishwashers capable of both bottom and top spraying, the pump supplying water to the spraying system typically employs a closed structure. This means the volute of the washing pump is located below the main body, and a rotating impeller is installed inside. The inlet of the volute is connected to the bottom of the washing chamber, and the outlet is connected to a water divider. This divider splits the water flow into a first branch supplying water to the first spray arm and a second branch supplying water to the second spray arm. Because the water pressure for both top and bottom spraying is supplied independently by the washing pump, the head, flow rate, and impact force of the water flow on each branch decrease significantly after the split, affecting the cleaning effect.

[0005] To address the aforementioned issues, the applicant's prior patent ZL 202023348766.9, "A Dual-Pump System and a Cleaning Machine Using the Dual-Pump System," discloses a structure in which the dual-pump system includes an upper impeller, a lower impeller, an upper housing, a lower housing, and a drive component. The upper housing has a first accommodating cavity for mounting the upper part of the first impeller, and the upper part of the lower housing has a second accommodating cavity for mounting the lower part of the first impeller. A first water inlet is opened on the side wall of the lower housing to supply water into the second accommodating cavity, and the lower part of the lower housing has a third accommodating cavity for mounting the lower impeller. A second water inlet and an outlet are opened on the side wall and / or bottom wall of the lower housing. This dual-pump system is an open system. The second accommodating cavity, the first accommodating cavity, and the upper impeller supply water for bottom spraying, while the third accommodating cavity and the lower impeller supply water for top and / or middle spraying. Because the power for the two water flows is independently supplied by corresponding pumps, the head and flow rate of each water flow are increased, which is beneficial for improving the cleaning effect.

[0006] However, because it uses an independent upper impeller for bottom water supply and a lower impeller for upper water supply, the overall structure is relatively complex and the production cost is high, making it impossible to achieve both cost savings and pumping efficiency. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a water flow system for a washing machine that can provide power for two separate washing water sources, and improve the head and water flow rate while simplifying the structure and saving costs, thereby improving the cleaning effect.

[0008] The second technical problem to be solved by the present invention is to provide a cleaning machine that uses the above-mentioned water flow system, in view of the current state of the prior art.

[0009] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is as follows:

[0010] A water flow system for a cleaning machine, comprising:

[0011] The volute has a water inlet at the bottom, a first water outlet at the top, and a second water outlet on the side.

[0012] A guide vane, disposed within the volute and dividing the volute cavity into an upper cavity and a lower cavity, wherein the first water outlet is connected to the upper cavity, and the second water outlet is connected to the lower cavity, and the edge of the guide vane is provided with a water inlet for water to enter the upper cavity from the lower cavity; and

[0013] The centrifugal impeller is rotatably disposed in the lower cavity and is used to draw water from below the volute into the lower cavity through the suction port, and to draw water from the lower cavity into the upper cavity through the guide port, and then draw it out through the first outlet and directly through the second outlet.

[0014] Preferably, the guide vane includes a cover plate and a side plate extending downward around the edge of the cover plate. The side plate forms an open-loop structure around the cover plate, with the opening corresponding to the second water outlet. The water guide outlet is located on the side plate and extends upward through the cover plate. With this structure, the guide vane itself does not move, but the cover plate and side plate of the guide vane cooperate with the inner wall of the volute to form a lower cavity that has both water suction and water pressure functions. During the rotation of the centrifugal impeller, part of the water flow is discharged from the side of the volute through the second water outlet as the centrifugal impeller rotates, while the other part of the water flow passes through the water guide outlet on the side plate, enters the upper cavity, and is transported upward through the first water outlet at the top of the volute. This invention achieves two-way water diversion through a simple structure, and the diversion method is highly compatible with the water suction direction of the centrifugal impeller itself, which helps to reduce fluid energy loss and maintain a high jet head.

[0015] Preferably, the edge of the cover plate is arranged close to the inner peripheral wall of the volute to separate the upper cavity and the lower cavity, and the outer peripheral wall of the side plate is arranged close to the inner peripheral wall of the lower part of the volute. This structure ensures a tight fit between the guide vane and the inner wall of the volute, improving assembly stability, preventing interference with water flow, and reducing fluid energy loss.

[0016] Preferably, the side of the volute is provided with a pressurizing surface that spirally extends from the first side edge of the second outlet to the second side edge along the water flow direction, and the opening on the side plate is arranged corresponding to the pressurizing surface. This pressurizing surface can pressurize the water flow about to be output through the second outlet, thereby increasing the water pressure and jet head of this portion of the water flow.

[0017] Preferably, the outer side of the volute is provided with water outlet pipes that are respectively connected to the end of the pressurizing surface and the second side edge of the second outlet. The first end of the side plate is arranged near the starting end of the pressurizing surface, and the second end is arranged near the second side edge of the second outlet. This structure helps to reduce the energy loss of the water flow.

[0018] Preferably, the inner circumferential wall of the side plate is provided with a guide vane that spirals inward against the direction of water flow. This guide vane is arranged circumferentially opposite to the second outlet. The distance between the inner sidewall of the guide vane and the centrifugal impeller gradually increases along the direction of water flow, thus forming a pressurizing surface for pressurizing the water about to be drawn out through the second outlet. More preferably, the end of the pressurizing surface is close to or connected to the beginning of the pressurizing surface. The guide vane can cooperate with the pressurizing surface to guide and pre-pressurize the water flow about to be output through the second outlet before the pressurizing surface, thereby further reducing fluid energy loss and increasing the water pressure and jet head of this portion of the water flow.

[0019] Preferably, the inner circumferential wall of the side plate is provided with guide vanes that spirally extend against the direction of water flow and gradually approach the edge of the centrifugal impeller. There are at least two sets of these guide vanes, spaced apart circumferentially on the side plate, and the water inlet is formed between two adjacent guide vanes. This structure can circumferentially pressurize and guide the water flow. Part of the water flow is pressurized circumferentially before being output through the second outlet, which helps to increase the water pressure of this part of the water flow. Another part of the water flow, after being pressurized circumferentially and output through the water inlet, can rise to the upper cavity at a higher flow velocity, thereby being sprayed upwards at a higher water pressure.

[0020] In a further preferred embodiment, the first end of the guide vane is smoothly connected to the side plate, and the second end of the guide vane is arranged close to the edge of the centrifugal impeller. The distance between the inner sidewall of each guide vane and the centrifugal impeller gradually increases spirally from its second end to its first end. This structure is beneficial for pressurizing the water flow while simultaneously concentrating the flow, maintaining a large water flow rate at the inlet.

[0021] Preferably, the guide vane includes a first guide vane and a second guide vane. The first guide vane is arranged close to the second outlet, and the second guide vane is arranged circumferentially opposite to the second outlet. The distance from the end of the first guide vane to the edge of the centrifugal impeller is less than the distance from the end of the second guide vane to the edge of the centrifugal impeller. The first and second guide vanes have the following functions: (1) They work together to pressurize the water flow in all the volutes in the circumferential direction; (2) The second end of the first guide vane is used to divert the water in the circumferential direction, so that a part of the water is output through the second outlet, and the other part of the water continues to flow circumferentially with the centrifugal impeller in the lower cavity. Most of the water in this part is transported to the first outlet through the guide vane; (3) The inner circumferential wall of the second guide vane pressurizes the water that is about to be output through the second outlet.

[0022] Preferably, the guide vane further includes a third guide vane located between the first and second guide vanes, and the water inlets are two in number, formed between the first and second guide vanes and between the second and third guide vanes, respectively. Providing two water inlets, spaced apart circumferentially along the water flow direction, helps reduce water flow interference and energy loss, and increases the water pressure of the water output through the first outlet.

[0023] Preferably, the second end of the side plate is connected to the end of the first guide vane via a smooth curved surface, and the first end of the smooth curved surface connects with the end of the first guide vane to form a diversion end for water diversion. The second end of the smooth curved surface is smoothly connected to the second side edge of the second outlet. This structure can divert water during circumferential flow and reduce fluid energy loss at the diversion point.

[0024] Preferably, the volute is cylindrical, the centrifugal impeller is centrally located within the volute, and the centrifugal impeller is eccentrically located relative to the lower volute cavity formed by the guide vanes and the inner wall of the volute in the circumferential direction. The water inlet is located near the centrifugal impeller and the lower volute cavity, and the second water outlet is located far from the centrifugal impeller and the lower volute cavity. Centrally locating the centrifugal impeller within the volute maintains high pumping efficiency; eccentrically locating it within the lower volute cavity and placing the water inlet near the centrifugal impeller and the lower volute cavity reduces water flow interference and energy loss at the water inlet, increasing the water pressure of the fluid entering the upper cavity; placing the second water outlet far from the centrifugal impeller and the lower volute cavity facilitates the pressurization of the water flow about to be output through the second water outlet by the guide vanes and the inner wall of the volute without side plates.

[0025] Preferably, the first end of the upstream guide vane and the second end of the downstream guide vane are staggered to form a water guide channel communicating with the water inlet, and the outlet end of the water guide channel is located inside the side plate and communicates with the first side of the water inlet. More preferably, the second side of the water inlet has a guide slope corresponding to the outlet end of the water guide channel, and this guide slope is arranged gradually away from the outlet end of the water guide channel from bottom to top. This structure can reduce the interference and energy loss of the water flowing upward through the water inlet, maintain smooth water flow, and achieve high water pressure and a large flow rate.

[0026] Preferably, the upper surface of the cover plate is provided with an upwardly extending baffle, which, together with the top wall of the volute, encloses a converging channel that communicates with the water guide and is used to collect the upward flow of water output from the first outlet. The inner wall of the converging channel is close to and smoothly transitions to the upper end of the guide slope. This structure can further pressurize the water flow about to be output from the first outlet and reduce the fluid energy loss of the water flow climbing up the upper edge of the water guide into the converging channel.

[0027] Preferably, the upper surface of the cover plate is provided with an upwardly extending baffle, which, together with the top wall of the volute, encloses a converging channel that communicates with the water inlet and is used to collect the water flow output upward through the first outlet. This structure can pressurize the water flow about to be output through the first outlet.

[0028] Further preferably, the first outlet is located at the center of the top wall of the volute, and the baffle includes an arc segment arranged around the edge of the first outlet, a first curved surface segment smoothly extending from the first end of the arc segment to the first edge of the outlet, and a second curved surface segment smoothly extending from the second end of the arc segment to the second edge of the outlet. This structure is beneficial for further improving the flow concentration effect, reducing fluid energy loss, and increasing water pressure.

[0029] Preferably, the upper surface of the cover plate is provided with reinforcing ribs that abut against the top wall of the pump casing, and the reinforcing ribs are arranged around the periphery of the baffle.

[0030] Preferably, the water flow system of the present invention further includes a first spray arm and a second spray arm disposed on the first spray arm. The bottom wall of the first spray arm is provided with a water inlet and a water inlet sleeve extending downward from the edge of the water inlet. The top of the volute is provided with a water outlet sleeve extending upward along the first water outlet. The water inlet sleeve is rotatably inserted into the water outlet sleeve. The water inlet end of the second spray arm is connected to the second water outlet of the volute through a water supply pipe. The water flow system of the present invention also includes a driving component disposed below the volute. The power output shaft of the driving component passes through the water inlet and is connected to the centrifugal impeller.

[0031] A cleaning machine includes a housing, a first spray arm, and a second spray arm, and also includes the aforementioned water flow system. The bottom of the housing is provided with a recessed return water area, the top of which is covered with a filter plate. The volute is located in the return water area, and there is a water intake gap between the bottom of the volute and the bottom of the return water area. The first outlet of the volute is located above the filter plate and is connected to the inlet of the first spray arm. The second spray arm is located in the upper part of the housing and is connected to the second outlet of the volute through a water supply pipe.

[0032] Compared with the prior art, the advantages of the present invention are as follows: The present invention is provided with guide vanes in the volute that can divert water. One stream of water is output through the first outlet at the top of the volute, and the other stream is output through the second outlet on the side of the volute. The guide vanes themselves do not move. Under the diversion effect of the guide vanes, the interference problem between the two streams of water is eliminated, the energy loss of the water flow is reduced, and both streams of water can maintain a high head and a large flow rate. The operation of the water flow system of the present invention can be completed by only one centrifugal impeller, the overall structure is simple, and the production cost is reduced. In addition, the present invention maintains an open water flow system, which is convenient for disassembly, assembly and cleaning of the water flow system. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the water flow system in an embodiment of the present invention (including the return water area);

[0034] Figure 2 for Figure 1 A sectional view of the middle section of the structure;

[0035] Figure 3 This is an assembly diagram of the volute, centrifugal impeller, and guide vanes in an embodiment of the present invention;

[0036] Figure 4 for Figure 3 A diagram from another angle;

[0037] Figure 5for Figure 3 A sectional view in the vertical direction;

[0038] Figure 6 for Figure 3 A cross-sectional view in the horizontal direction (showing the structural fit within the upper cavity);

[0039] Figure 7 for Figure 3 Another cross-sectional view from the horizontal direction (showing the structural fit within the lower cavity);

[0040] Figure 8 for Figure 3 Exploded view;

[0041] Figure 9 for Figure 8 A diagram from another angle;

[0042] Figure 10 This is a schematic diagram of the guide vane structure in an embodiment of the present invention;

[0043] Figure 11 This is a schematic diagram of the bottom structure of the guide vane in an embodiment of the present invention;

[0044] Figure 12 This is a schematic diagram of the cleaning machine in an embodiment of the present invention;

[0045] Figure 13 This is another schematic diagram of the guide vane in an embodiment of the present invention. Detailed Implementation

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0047] like Figures 1-12 As shown, the water flow system used in this embodiment for the cleaning machine is mainly used in the cleaning machine, and the water jet is used to clean the tableware.

[0048] like Figures 1-11 As shown, the water flow system of this embodiment includes a volute 1, a guide vane 2, and a centrifugal impeller 3. The bottom of the volute 1 has a water inlet 13, the top of the volute 1 has a first water outlet 11, and the side has a second water outlet 12. The guide vane 2 is disposed in the volute 1 and divides the inner cavity of the volute 1 into an upper cavity 21 and a lower cavity 22. The first water outlet 11 is connected to the upper cavity 21, and the second water outlet 12 is connected to the lower cavity 22. The edge of the guide vane 2 is provided with a guide port 23 for water to enter the upper cavity 21 from the lower cavity 22. The centrifugal impeller 3 is rotatably disposed in the lower cavity 22 and is used to draw water from below the volute 1 into the lower cavity 22 through the water inlet 13, and draw water from the lower cavity 22 into the upper cavity 21 through the guide port 23, and then draw it out through the first water outlet 11 and directly through the second water outlet 12.

[0049] The guide vane 2 includes a cover plate 24 and a side plate 25 extending downward around the edge of the cover plate 24. The side plate 25 forms an open-loop structure around the cover plate 24, and the opening 251 corresponds to the second outlet 12. The guide port 23 is opened on the side plate 25 and extends upward through the cover plate 24. The edge of the cover plate 24 is arranged close to the inner peripheral wall of the volute 1 to separate the upper cavity 21 and the lower cavity 22. The outer peripheral wall of the side plate 25 is arranged close to the inner peripheral wall of the lower part of the volute 1, so that the guide vane 2 and the inner wall of the volute 1 are tightly connected to improve the assembly stability, avoid interference with the water flow, and reduce fluid energy loss. In this embodiment, the guide vane 2 itself does not move, but the cover plate 24 and side plate 25 of the guide vane 2 cooperate with the inner wall of the volute 1 to form a lower cavity 22 that has both water absorption and water pressure functions. During the rotation of the centrifugal impeller 3, part of the water flow is output from the side of the volute 1 through the second outlet 12 as the centrifugal impeller 3 rotates, and another part of the water flow passes through the guide port 23 on the side plate 25 and enters the upper cavity 21 and is transported upward through the first outlet 11 at the top of the volute 1. In this embodiment, the guide vane 2 realizes the two-way diversion of water, and the above diversion method is highly compatible with the water intake direction of the centrifugal impeller 3 itself, which is conducive to reducing fluid energy loss and maintaining a high jet head.

[0050] In this embodiment, the volute 1 has a pressurizing surface 14 spirally extending from the first side edge 121 to the second side edge 122 of the second outlet 12 along the water flow direction. The opening 251 on the side plate 25 corresponds to the pressurizing surface 14. The pressurizing surface 14 can pressurize the water flow that is about to be output through the second outlet 12, thereby increasing the water pressure and jet head of this part of the water flow. The outside of the volute 1 is provided with a water outlet pipe 15 that is connected to the end of the pressurizing surface 14 and the second side edge 122 of the second outlet 12, respectively. The first end of the side plate 25 is arranged near the starting end of the pressurizing surface 14, and the second end is arranged near the second side edge 122 of the second outlet 12. This structure helps to further reduce the energy loss of the water flow.

[0051] In this embodiment, the inner circumferential wall of the side plate 25 is provided with guide vanes 26 that spirally extend against the direction of water flow and gradually approach the edge of the centrifugal impeller 3. There are three sets of guide vanes 26, which are spaced apart in the circumferential direction of the side plate 25. The water guide 23 is formed between two adjacent guide vanes 26. This structure can pressurize and guide the water flow in the circumferential direction. Part of the water flow is pressurized in the circumferential direction and then output through the second water outlet 12, which is beneficial to increase the water pressure of this part of the water flow. Another part of the water flow is pressurized in the circumferential direction and output through the water guide 23, which can rise to the upper cavity 21 at a larger flow rate, thereby spraying upward with a larger water pressure. The first end of the guide vane 26 is smoothly connected to the side plate 25, and the second end of the guide vane 26 is arranged close to the edge of the centrifugal impeller 3. The distance between the inner side wall of each guide vane 26 and the centrifugal impeller 3 gradually increases in a spiral shape from its second end to its first end. This structure is beneficial to achieve water flow pressurization while playing a flow-gathering role and maintaining a large water flow at the water inlet 23.

[0052] In this embodiment, the guide vane 26 includes a first guide vane 261, a second guide vane 262, and a third guide vane 263. The first guide vane 261 is arranged close to the second outlet 12, and the second guide vane 262 is arranged circumferentially opposite to the second outlet 12. The distance from the end of the first guide vane 261 to the edge of the centrifugal impeller 3 is less than the distance from the end of the second guide vane 262 to the edge of the centrifugal impeller 3. The third guide vane 262 is located between the first guide vane 261 and the second guide vane 262. There are two guide ports 23, which are respectively formed between the first guide vane 261 and the second guide vane 262, and between the second guide vane 262 and the third guide vane 263. The above-mentioned guide vane 26 has the following functions: (1) The first guide vane 261, the second guide vane 262, and the third guide vane 263 work together to pressurize the water flow in all the volutes 1 in the circumferential direction; (2) The second end of the first guide vane 261 is used to divert the water in the circumferential direction, so that a part of the water is output through the second outlet 12, and the other part of the water continues to flow in the lower cavity 22 with the centrifugal impeller 3 in the circumferential direction. Most of the water in this part is transported to the first outlet 11 through the guide vane 23; (3) The inner circumferential wall of the second guide vane 262 pressurizes the water that is about to be output through the second outlet 12; (4) Enclosing two guide vanes 23, and the two guide vanes 23 are arranged at intervals in the circumferential direction along the water flow direction, which is conducive to reducing water flow interference and energy loss, and increasing the water pressure of the water flow output through the first outlet 11.

[0053] The second guide vane 262 is arranged circumferentially opposite to the second outlet 12. The distance between the inner wall of the second guide vane 262 and the centrifugal impeller 3 gradually increases along the water flow direction, thus forming a pressurizing surface 2621 for pressurizing the water to be drawn out through the second outlet 12. The end of the pressurizing surface 2621 is close to or connected to the starting end of the pressurizing surface 14. The second guide vane 262 can cooperate with the pressurizing surface 14 to guide and pre-pressurize the water flow to be output through the second outlet 12 before the pressurizing surface 14, thereby further reducing fluid energy loss and increasing the water pressure and jet head of this part of the water flow.

[0054] The second end of the aforementioned side plate 25 is connected to the end of the first guide vane 261 via a smooth curved surface 264. The first end of this smooth curved surface 264 connects with the end of the first guide vane 261 to form a diversion end 265 for water diversion. The second end of the smooth curved surface 264 is smoothly connected to the second side edge 122 of the second outlet 12. This structure can divert water during circumferential flow and reduce fluid energy loss at the diversion point.

[0055] It should be noted that there are at least two flow guides 26. In this embodiment, three are used for illustration, but there can be more than three. The number of flow guides can be set according to the flow distribution requirements.

[0056] In this embodiment, the volute 1 is cylindrical, the centrifugal impeller 3 is centrally arranged in the volute 1, and the centrifugal impeller 3 is eccentrically arranged relative to the lower volute cavity 260 formed by the guide vane 26 and the inner wall of the volute 1 in the circumferential direction. The water inlet 23 is arranged near the centrifugal impeller 3 and the lower volute cavity 260, and the second water outlet 12 is arranged far from the centrifugal impeller 3 and the lower volute cavity 260. The centrifugal impeller 3 is centrally positioned in the volute 1 to maintain high pumping efficiency; while the centrifugal impeller 3 is eccentrically positioned in the lower volute 260, and the water guide 23 is positioned close to the centrifugal impeller 3 and the lower volute 260 to reduce water flow interference and energy loss at the water guide 23 and increase the water pressure of the fluid entering the upper cavity 21; the second water outlet 12 is positioned far from the centrifugal impeller 3 and the lower volute 260 to facilitate the pressurization of the water flow that will be output through the second water outlet 12 by the guide vane 26 and the inner wall of the volute 1 without the side plate 25.

[0057] In this embodiment, the first end of the upstream guide vane 26 and the second end of the downstream guide vane 26 are interleaved to form a water guide channel 231 that communicates with the water guide port 23. The outlet end of the water guide channel 231 is located inside the side plate 25 and communicates with the first side of the water guide port 23. The second side of the water guide port 23 has a guide slope 232 arranged corresponding to the outlet end of the water guide channel 231. The guide slope 232 is arranged from bottom to top away from the outlet end of the water guide channel 231. The above structure can reduce the interference and energy loss of the water flowing upward through the water guide port 23, maintain smooth water flow, and have high water pressure and large flow rate.

[0058] The upper surface of the cover plate 24 is provided with an upwardly extending baffle 27. The baffle 27 and the top wall of the volute 1 together enclose a converging channel 270 that is connected to the water guide 23 and is used to collect the water flow output upward from the first outlet 11. The inner sidewall of the converging channel 270 is close to and smoothly transitions to the upper end of the guide slope 232. This structure can further pressurize the water flow that is about to be output from the first outlet 11 and reduce the fluid energy loss of the water flow as it climbs up the upper edge of the water guide 23 to the converging channel 270.

[0059] The aforementioned baffle 27 and converging channel 270 are used to pressurize the water flow that is about to be output through the first outlet 11. The first outlet 11 is located in the center of the top wall of the volute 1. The baffle 27 includes an arc segment 271 arranged around the edge of the first outlet 11, a first curved surface segment 272 that smoothly extends from the first end of the arc segment 271 to the first edge of the guide port 23, and a second curved surface segment 273 that smoothly extends from the second end of the arc segment 271 to the second edge of the guide port 23. This structure is beneficial for further improving the flow concentration effect, reducing fluid energy loss, and increasing water pressure.

[0060] In this embodiment, a third curved section 274 is provided between the first curved section 272 and the second curved section 273. The third curved section 274 is used to divide the confluence channel 270 into branch channels corresponding to a water guide 23. The outer end of the third curved section 274 is connected to the guide slope 232 at the upper end of the third guide plate 263, and the inner end is close to the opening of the arc section 271. The two branch channels converge before entering the opening of the arc section 271 to guide and rectify the water flow, reduce water flow interference and energy loss.

[0061] In this embodiment, it is also possible to... Figure 13 As shown, the upper surface of the cover plate 24 is provided with reinforcing ribs 28 that abut against the top wall of the pump casing. These reinforcing ribs 28 are arranged around the periphery of the baffle plate 27 to improve reliability after assembly and during use.

[0062] The water flow system of this embodiment also includes a first spray arm 4 and a second spray arm 5 disposed on the first spray arm 4. The bottom wall of the first spray arm 4 is provided with a water inlet 41 and a water inlet sleeve 42 extending downward from the edge of the water inlet 41. The top of the volute 1 is provided with a water outlet sleeve 16 extending upward along the first water outlet 11. The water inlet sleeve 42 is rotatably inserted into the water outlet sleeve 16. The water inlet end of the second spray arm 5 is connected to the second water outlet 12 of the volute 1 through a water supply pipe 6. The water flow system of this embodiment also includes a drive component 7, which is a motor disposed below the volute 1. The power output shaft 71 of the drive component 7 passes through the water inlet 13 and is connected to the centrifugal impeller 3.

[0063] like Figure 1 , 12 As shown, the cleaning machine of this embodiment includes a housing 8 and the aforementioned water flow system. A recessed return water area 81 is provided at the bottom of the housing 8. A filter plate 82 covers the top of the return water area 81. A volute 1 is located in the return water area 81. There is a water suction gap between the water suction port 13 at the bottom of the volute 1 and the bottom of the return water area 81. The first water outlet 11 at the top of the volute 1 is located above the filter plate 82 and is connected to the water inlet 41 of the first spray arm 4. The second spray arm 5 is located in the upper part of the housing 8 and is connected to the second water outlet 12 of the volute 1 through a water supply pipe 6.

[0064] In this embodiment, a guide vane 2 is provided in the volute 1 to divert water. One stream of water is output through the first outlet 11 at the top of the volute 1, and the other stream is output through the second outlet 12 on the side of the volute 1. The guide vane 2 itself does not move. Under the diversion effect of the guide vane 2, the interference problem between the two streams of water is eliminated, the energy loss of the water flow is reduced, and both streams of water can maintain a high head and a large flow rate. The operation of the water flow system in this embodiment can be completed by only one centrifugal impeller 3. The overall structure is simple and the production cost is reduced.

[0065] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A water flow system for a washing machine, characterized in that The utility model relates to a water pump, comprising: a volute (1) with a water suction port (13) at the bottom, a first water outlet (11) at the top and a second water outlet (12) at the side; a guide vane (2) arranged in the volute (1) and separating the inner cavity of the volute (1) into an upper cavity (21) and a lower cavity (22), the first water outlet (11) being connected to the upper cavity (21) and the second water outlet (12) being connected to the lower cavity (22), the edge of the guide vane (2) being provided with a water guide port (23) for water to flow from the lower cavity (22) into the upper cavity (21); and a centrifugal impeller (3) rotatably arranged in the lower cavity (22) for sucking water from below the volute (1) through the water suction port (13) into the lower cavity (22), then pumping the water in the lower cavity (22) into the upper cavity (21) through the water guide port (23) and further pumping the water out through the first water outlet (11) and directly through the second water outlet (12). The guide vane (2) comprises a cover plate (24) and a side plate (25) extending downward around the edge of the cover plate (24), the side plate (25) forms an open loop structure in the circumferential direction of the cover plate (24) and the opening is arranged corresponding to the second water outlet (12), and the water guide port (23) is arranged on the side plate (25) and penetrates the cover plate (24) upward.

2. The water flow system for a cleaning machine according to claim 1, characterized in that: The edge of the cover plate (24) is arranged close to the inner circumferential wall of the volute (1) for separating the upper cavity (21) and the lower cavity (22), and the outer circumferential wall of the side plate (25) is arranged close to the inner circumferential wall of the lower part of the volute (1).

3. The water flow system for a cleaning machine of claim 1, wherein: The side of the volute (1) is provided with a pressurizing surface (14) spirally extending from the first side edge (121) to the second side edge (122) of the second water outlet (12) along the water flow direction, and the opening on the side plate (25) is arranged corresponding to the pressurizing surface (14).

4. Water flow system for a washing machine according to claim 3, characterized in that: The volute (1) is provided with a water outlet pipe (15) connected to the end of the pressurizing surface (14) and the second side edge (122) of the second water outlet (12) respectively, the first end of the side plate (25) is arranged close to the starting end of the pressurizing surface (14), and the second end is arranged close to the second side edge (122) of the second water outlet (12).

5. The water flow system for a cleaning machine of claim 3, wherein: The inner circumferential wall of the side plate (25) is provided with a guide vane (26) spirally extending inward against the water flow direction, the guide vane (26) is arranged opposite to the second water outlet (12) in the circumferential direction, and the distance between the inner side wall of the guide vane (26) and the centrifugal impeller (3) gradually increases along the water flow direction to form a pressurizing curved surface (2621) for pressurizing the water to be pumped out through the second water outlet (12).

6. Water flow system for a washing machine according to claim 5, characterized in that: The end of the pressurizing curved surface (2621) is close to or connected to the starting end of the pressurizing surface (14).

7. Water flow system for a washing machine according to any of the claims from 1 to 6, characterized in that: The inner circumferential wall of the side plate (25) is provided with guide vanes (26) spirally extending against the water flow direction and gradually close to the edge of the centrifugal impeller (3), the guide vanes (26) are at least two groups and are arranged in the circumferential direction of the side plate (25) at intervals, and the water guide port (23) is formed between the adjacent two guide vanes (26).

8. Water flow system for a washing machine according to claim 7, characterized in that: The first end of the guide vane (26) is smoothly connected with the side plate (25), and the second end of the guide vane (26) is arranged close to the edge of the centrifugal impeller (3), and the distance between the inner wall of each guide vane (26) and the centrifugal impeller (3) gradually increases in a spiral manner from the second end to the first end.

9. The water flow system for a cleaning machine of claim 7, wherein: The guide vane (26) comprises a first guide vane (261) and a second guide vane (262), the first guide vane (261) is arranged close to the second water outlet (12), and the second guide vane (262) is arranged opposite to the second water outlet (12) in the circumferential direction, and the distance from the end of the first guide vane (261) to the edge of the centrifugal impeller (3) is smaller than the distance from the end of the second guide vane (262) to the edge of the centrifugal impeller (3).

10. Water flow system for a washing machine according to claim 9, characterized in that: The guide vane (26) further comprises a third guide vane (263) arranged between the first guide vane (261) and the second guide vane (262), and the water guide (23) is formed between the first guide vane (261) and the second guide vane (262) and between the second guide vane (262) and the third guide vane (263).

11. The water flow system for a cleaning machine of claim 9, wherein: The second end of the side plate (25) and the end of the first guide vane (261) are connected by a smooth curved surface (264), the first end of the smooth curved surface (264) is connected with the end of the first guide vane (261) to form a flow dividing end (265) for dividing water flow, and the second end of the smooth curved surface (264) is smoothly connected with the second side edge (122) of the second water outlet (12).

12. The water flow system for a cleaning machine of claim 7, wherein: The volute (1) is cylindrical, the centrifugal impeller (3) is arranged in the center of the volute (1), and the centrifugal impeller (3) is arranged eccentrically relative to the lower volute cavity (260) enclosed by the guide vane (26) and the inner wall of the volute (1) in the circumferential direction, the water guide (23) is arranged close to the centrifugal impeller (3) and the lower volute cavity (260), and the second water outlet (12) is arranged away from the centrifugal impeller (3) and the lower volute cavity (260).

13. The water flow system for a cleaning machine of claim 7, wherein: The first end of the guide vane (26) upstream and the second end of the guide vane (26) downstream are staggered to form a water guide flow channel (231) connected with the water guide (23), and the water outlet end of the water guide flow channel (231) is located inside the side plate (25) and penetrates the first side of the water guide (23).

14. The water flow system for a cleaning machine of claim 13, wherein: The second side of the water guide (23) is formed with a guide inclined surface (232) arranged corresponding to the water outlet end of the water guide flow channel (231), and the guide inclined surface (232) gradually moves away from the water outlet end of the water guide flow channel (231) from bottom to top.

15. The water flow system for a cleaning machine of claim 14, wherein: The upper surface of the cover plate (24) is provided with an upwardly extending baffle (27), the baffle (27) and the top wall of the volute (1) jointly enclose a flow converging channel (270) connected with the water guide (23) and used for converging water flow output upwardly through the first water outlet (11), and the inner side wall of the flow converging channel (270) is close to the upper end of the guide inclined surface (232) and smoothly transitions.

16. The water flow system for a cleaning machine according to any one of claims 1 ~ 6, characterized in that: The upper surface of the cover plate (24) is provided with an upwardly extending baffle (27), which together with the top wall of the volute (1) encloses a converging channel (270) that is connected to the water inlet (23) and is used to collect the water flow output upward through the first outlet (11).

17. The water flow system for a cleaning machine of claim 16, wherein: The upper surface of the cover plate (24) is provided with a reinforcing rib (28) that abuts against the top wall of the pump casing. The reinforcing rib (28) is arranged around the periphery of the baffle (27).

18. The water flow system for a cleaning machine of claim 16, wherein: The first outlet (11) is located in the center of the top wall of the volute (1). The baffle (27) includes an arc segment (271) arranged around the edge of the first outlet (11), a first curved surface segment (272) extending smoothly from the first end of the arc segment (271) to the first edge of the water inlet (23), and a second curved surface segment (273) extending smoothly from the second end of the arc segment (271) to the second edge of the water inlet (23).

19. The water flow system for a cleaning machine according to any one of claims 1 ~ 6, characterized in that: It also includes a first spray arm (4), the bottom wall of which is provided with a water inlet (41) and a water inlet sleeve (42) extending downward from the edge of the water inlet (41). The top of the volute (1) is provided with a water outlet sleeve (16) extending upward along the first water outlet (11). The water inlet sleeve (42) is rotatably inserted into the water outlet sleeve (16).

20. The water flow system for a cleaning machine according to any one of claims 1 ~ 6, characterized in that: It also includes a second spray arm (5) disposed on the first spray arm (4), the water inlet of the second spray arm (5) being connected to the second water outlet (12) of the volute (1) through a water supply pipe (6).

21. The water flow system for a cleaning machine according to any one of claims 1 ~ 6, characterized in that: It also includes a drive unit (7), which is located below the volute (1). The power output shaft (71) of the drive unit (7) passes through the water inlet (13) and is connected to the centrifugal impeller (3).

22. A cleaning machine comprising a cabinet (8), a first spray arm (4) and a second spray arm (5), characterised in that: The system also includes a water flow system according to any one of claims 1 to 18, wherein a recessed return water area (81) is provided at the bottom of the housing (8), the top of the return water area (81) is covered by a filter plate (82), the volute (1) is located in the return water area (81), the water inlet (13) at the bottom of the volute (1) has a water inlet gap with the bottom of the return water area (81), the first water outlet (11) at the top of the volute (1) is located above the filter plate (82) and is connected to the water inlet (41) of the first spray arm (4), and the second spray arm (5) is located in the upper part of the housing (8) and is connected to the second water outlet (12) of the volute (1) through a water supply pipe (6).

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