A cleaning machine

Abstract

The present invention relates to a cleaning machine, comprising a box body with a washing chamber and an open water pump arranged at the bottom of the box body, wherein the open water pump comprises: a pump casing, an impeller, and a water dividing member. The water dividing member of the present invention cooperates with a water baffle plate to form an area at the lower part of the pump casing that can pressurize and divert water entering the pump casing. The first water after diversion is output through a first water outlet at the top of the pump casing, and the second water is output through a second water outlet at the side of the pump casing. Since the second water is directly output circumferentially through the pump casing under the water baffle as the impeller rotates, the first water is output upward after being radially guided by the water dividing member, thereby eliminating the interference problem of the two water outlets, reducing the energy loss of the water flow, and enabling the two water outlets to maintain a high head and a large water flow rate. The present invention can complete the two-way water pumping by only relying on one impeller, and the overall structure is simple, reducing the production cost. In addition, the present invention maintains the use of an open water flow system, which is convenient for disassembly and assembly and cleaning of the water flow system.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, in particular to a washing machine for washing tableware. Background Art

[0002] For a dishwasher with a larger volume, in order to achieve a better washing effect, at least two groups of spray arms arranged up and down are generally provided. When working, the washing pump delivers water to each spray arm for spraying up and down. After washing the dishes, the water that falls back gathers in the water cup at the bottom of the dishwasher. The washing pump delivers the falling water to each spray arm again, completing a water flow 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 spraying system generally adopts a closed structure, that is, the pump housing of the washing pump is arranged below the box body, a rotatable impeller is arranged in the pump housing, the water inlet of the washing pump housing is connected to the bottom of the washing chamber, and the water outlet of the pump housing is connected to a water dividing device, which divides 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. Since the water pressure of the top spray water and the bottom spray water are independently supplied by the washing pump, the head, flow rate and impact force of the water flow on each branch after the diversion are greatly reduced, affecting the cleaning effect.

[0005] In order to solve the above problems, the applicant's prior patent ZL 202023348766.9 "A dual pump system and a cleaning machine using the dual pump system" discloses a structure, wherein the dual pump system includes an upper impeller, a lower impeller, an upper shell, a lower shell and a driving member, wherein the upper shell has a first accommodating chamber for installing the upper part of the first blade, the upper part of the lower shell has a second accommodating chamber for installing the lower part of the first blade, the side wall of the lower shell is provided with a first water inlet for supplying water into the second accommodating chamber, the lower part of the lower shell has a third accommodating chamber for installing the lower impeller, and the side wall and / or bottom wall of the lower shell are provided with a second water inlet and a water outlet. The above dual pump system is an open system, wherein the second accommodating chamber, the first accommodating chamber and the upper impeller are used for bottom spraying water supply, and the third accommodating chamber and the lower impeller are used for top and / or middle spraying water supply. Since the power of the two water flows is independently supplied by the corresponding pumps, the head and water flow of each water flow are increased, which is conducive to improving the cleaning effect.

[0006] However, since it uses an independent upper impeller to supply water to the bottom layer and a lower impeller to supply water to the upper layer, the overall structure is relatively complex and the production cost is high, and it is impossible to take into account the pumping effect while saving costs. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a cleaning machine which can provide power for two washing water routes respectively, and improve the head and water flow rate and thus improve the cleaning effect on the basis of simplifying the structure and saving costs, in view of the current status of the prior art.

[0008] The technical solution adopted by the present invention to solve the above technical problems is:

[0009] A cleaning machine comprises a box body having a washing chamber and an open water pump arranged at the bottom of the box body, wherein the open water pump comprises:

[0010] A pump housing is disposed in the washing chamber and has a water suction port at the bottom, a first water outlet at the top, and a second water outlet at the side;

[0011] An impeller is rotatably disposed in the lower part of the pump casing and is used to provide water pumping power;

[0012] A water dividing member is arranged in the pump casing and located above the impeller. The water dividing member is separated between the impeller and the first water outlet. A water supply gap is formed between the edge of the water dividing member and the inner peripheral wall of the pump casing. A water baffle is arranged in the pump casing and can cover the water supply gap between the second water outlet and the corresponding edge of the water dividing member to control the water flow rate of the second water outlet.

[0013] The water dividing member of the present invention cooperates with the water baffle plate to form an area at the lower part of the pump casing that can pressurize and divert water entering the pump casing. The first water after diversion is output through the first water outlet on the top of the pump casing, and the second water is output through the second water outlet on the side of the pump casing. Since the second water is directly output circumferentially through the pump casing under the water baffle as the impeller rotates, the first water is output upward after being radially guided by the water dividing member, thereby eliminating the interference problem of the two water outlets, reducing the water flow energy loss, and allowing the two water outlets to maintain a higher head and a larger water flow rate. The present invention can complete the two-way water pumping by relying on only one impeller, and the overall structure is simple, which reduces the production cost. In addition, the present invention maintains the use of an open water flow system, which is convenient for disassembly and assembly and cleaning of the water flow system.

[0014] Preferably, the water distribution member includes a circular horizontal portion and an inclined portion extending radially from the edge of the horizontal portion from the inside to the outside and from the top to the bottom. The horizontal portion is arranged corresponding to the first water outlet, and the lower edge of the inclined portion encloses a guide area corresponding to the impeller arrangement. With the above structure, the horizontal portion, on the one hand, blocks the first water outlet and cooperates with the water baffle to limit the water flow directed upward to achieve reasonable water distribution. On the other hand, the horizontal portion and the inclined portion cooperate to form a guide area with an inner diameter that gradually increases from bottom to top. During the rotation of the impeller, the water stored in the guide area is accelerated circumferentially while being guided to the bottom of the water supply gap under the guidance of the conical inner surface, providing pre-acceleration and guide for the water flow directed upward through the water supply gap, which is conducive to increasing the pressure and injection head of this part of the water flow, thereby improving the cleaning effect.

[0015] Preferably, the outer peripheral wall of the inclined portion is provided with a plurality of guide blades spaced circumferentially and extending spirally from bottom to top, and a guide channel is formed between two adjacent guide blades for conveying water under the guide area from bottom to top. This structure is conducive to converging and rectifying the water flow directed upward, reducing energy loss and improving water pumping efficiency.

[0016] Preferably, the horizontal part is located below the first water outlet and has a spacing with the inner top wall of the pump housing, the upper end of the guide vane is connected with the inner top wall of the pump housing, and the guide vane extending above the horizontal part, the upper surface of the horizontal part, and the inner top wall of the pump housing together enclose a converging flow channel for gathering water in the guide flow channel to the first water outlet. This structure is conducive to rectifying and converging the water flow near the first water outlet, reducing the energy loss of the water flow.

[0017] Preferably, the guide vanes are integrally formed with the water distributor and the inner wall of the pump housing. This structure is easy to produce and manufacture, and improves the reliability and stability of the overall structure.

[0018] Preferably, the inclined portion is formed into an outwardly arched arc structure, the inner surface of which forms a first guide surface that can cooperate with the impeller to circumferentially accelerate the water in the guide area. This structure is conducive to further improving the water flow acceleration and guide effect in the guide area.

[0019] Preferably, the outer surface of the arc structure forms a second flow guide surface, and the inner peripheral wall of the pump housing forms an arc-shaped flow guide surface with an inner diameter gradually decreasing from bottom to top at a portion corresponding to the second flow guide surface, and the second flow guide surface and the arc-shaped flow guide surface together enclose a flow-gathering channel that can guide the water flow spirally upward. This structure is conducive to further reducing the energy loss of the water flow and increasing the water pressure of the water flow.

[0020] Preferably, the impeller is a centrifugal impeller, the bottom of the centrifugal impeller is provided with an inlet corresponding to the water suction port, the side of the centrifugal impeller is provided with an outlet corresponding to the inner wall of the pump casing, and the outlet edge of the centrifugal impeller is arranged near the lower end of the flow-gathering channel. This structure can draw the water flow guided through the edge of the diversion area into the flow-gathering channel and transport it upward, shortening the retention stroke of the accelerated water flow in the pump casing, reducing energy loss, and improving the water pumping effect.

[0021] Preferably, the lower edge of the inclined portion encloses an opening, and the impeller diameter is smaller than the opening diameter. Since the water pump of the present invention is an open water pump, the water inlet at the bottom of the pump housing is directly connected to the washing chamber and directly corresponds to the impeller arrangement, and the impeller may have a certain amount of up and down movement. The above structure can eliminate the interference problem that may be caused by the up and down movement of the impeller.

[0022] Preferably, the inner edge of the water baffle is connected to the lower edge of the inclined portion, and the outer edge is connected to the inner peripheral wall of the pump casing below the second water outlet.

[0023] Preferably, the side of the pump housing is provided with a pressurizing surface that spirally extends from the first side edge of the second water outlet to the second side edge along the water flow direction, and the pressurizing surface is located within the coverage area below the water baffle, and the second water outlet of the pump housing is also provided with a water outlet pipe section tangentially connected to the pressurizing surface. The pressurizing surface can be provided to pressurize the water flow that is about to be output through the second water outlet, so as to increase the water pressure and injection head of this part of the water flow.

[0024] In the present invention, the length of the water baffle in the circumferential direction of the water diversion member is determined according to the flow requirements of the first and second water outlets. The longer the water baffle is, the greater the water flow of the second water outlet is and the smaller the water flow of the first water outlet is, and vice versa.

[0025] In order to facilitate assembly, the outer bottom wall of the pump housing is provided with a positioning column for constraining it to the inner bottom wall of the box body. When assembled, a water absorption gap is formed between the outer bottom wall of the pump housing and the inner bottom wall of the box body. The positioning column can be constrained to the bottom of the box body by plugging or screw connection. With the above structure, the water suction port can also be lowered to prevent bubbles from being absorbed and affecting the energy efficiency of the water pump.

[0026] Preferably, there are at least two positioning columns arranged around the periphery of the water suction port, and the outer bottom wall of the pump housing is also provided with flow guide ribs arranged around the water suction port for rectification, and the flow guide ribs are arranged close to the positioning columns. Further preferably, the flow guide ribs are shuttle-shaped and symmetrically arranged on both sides of the positioning column and extend radially along the water suction port. After the positioning column is set, the water flow at the water suction port may be turbulent. The above-mentioned flow guide ribs are set to rectify and guide the water flow near the positioning column to avoid energy loss caused by turbulent water flow.

[0027] In the present invention, a driving member is provided at the outer bottom of the box body, and the output shaft of the driving member passes through the bottom wall of the box body and the water suction port in an upward direction to be connected with the impeller.

[0028] The present invention also includes a first spray arm and a second spray arm. The first spray arm is rotatably arranged on the pump housing and is connected to the first water outlet. The second spray arm is arranged in the middle or upper part of the washing chamber and is connected to the second water outlet through a water conduit.

[0029] Compared with the prior art, the advantages of the present invention are: the water dividing member of the present invention cooperates with the water baffle plate to form an area at the lower part of the pump casing that can pressurize and divert the water entering the pump casing. The first water after diversion is output through the first water outlet on the top of the pump casing, and the second water is output through the second water outlet on the side of the pump casing. Since the second water is directly output circumferentially through the pump casing under the water baffle as the impeller rotates, the first water is output upward after being radially guided by the water dividing member, thereby eliminating the interference problem of the two water outlets, reducing the water flow energy loss, and allowing the two water outlets to maintain a higher head and a larger water flow rate; the present invention can complete the two-way water pumping by relying on only one impeller, the overall structure is simple, and the production cost is reduced; in addition, the present invention maintains the use of an open water flow system, which is convenient for disassembly and assembly and cleaning of the water flow system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a partial structural schematic diagram of a cleaning machine in an embodiment of the present invention (part of the box is hidden);

[0031] Figure 2 It is a structural schematic diagram of a cleaning machine in an embodiment of the present invention;

[0032] Figure 3 This is an assembly diagram of an open water pump and a first spray arm in an embodiment of the present invention (with the driving parts hidden);

[0033] Figure 4 for Figure 3 A schematic diagram of the structure from another angle;

[0034] Figure 5 for Figure 1 A cross-sectional view of

[0035] Figure 6 This is a diagram showing the coordination of the pump casing and the water distribution member in an embodiment of the present invention (with the top wall of the pump casing hidden);

[0036] Figure 7 for Figure 6 Bottom cross-sectional view of . DETAILED DESCRIPTION

[0037] The present invention is further described in detail below with reference to the accompanying drawings.

[0038] like Figures 1 to 7 As shown, the cleaning machine of this embodiment includes a box body 5 with a washing chamber 10, a first spray arm 6, a second spray arm 7 and an open water pump A arranged at the bottom of the box body 5. The open water pump A includes a pump housing 1, an impeller 2, a water distributor 3, and a driving member 4. The pump housing 1 is generally a cylindrical structure closed from top to bottom. The pump housing 1 is arranged in the washing chamber 10 and is arranged near the bottom of the washing chamber 10. The pump housing 1 has 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. The impeller 2 is rotatably arranged in the lower part of the pump housing 1 to provide water pumping power. The outer bottom of the box body 5 is provided with a driving member 4, which is a motor and the output shaft passes through the bottom wall of the box body 5 and the water suction port 13 upward and is connected to the impeller 2. The first spray arm 6 is rotatably disposed on the pump housing 1 and is connected to the first water outlet 11 . The second spray arm 7 is disposed in the middle or upper part of the washing chamber 10 and is connected to the second water outlet 12 through the water conduit 8 .

[0039] The water dividing member 3 is arranged in the pump casing 1 and is located above the impeller 2. The water dividing member 3 is separated between the impeller 2 and the first water outlet 11. A water supply gap 31 is formed between the edge of the water dividing member 3 and the inner peripheral wall of the pump casing 1. A water baffle 32 is arranged in the pump casing 1, which can cover the water supply gap 31 between the second water outlet 12 and the corresponding edge of the water dividing member 3 to control the water flow rate of the second water outlet 12. The water dividing member 3 cooperates with the water baffle plate 32 to form an area at the lower part of the pump casing 1 that can pressurize and divert the water entering the pump casing 1. The first water after diversion is output through the first water outlet 11 on the top of the pump casing 1, and the second water is output through the second water outlet 12 on the side of the pump casing 1. Since the second water rotates with the impeller 2, it is directly output circumferentially through the pump casing 1 under the water baffle 32, and the first water is radially guided by the water dividing member 3 and then output upward, thereby eliminating the interference problem of the two water outlets, reducing the water flow energy loss, and allowing the two water outlets to maintain a higher head and a larger water flow rate.

[0040] Specifically, the water distribution member 3 of this embodiment includes a circular horizontal portion 33 and an inclined portion 34 extending gradually from the inside to the outside and from the top to the bottom along the radial direction from the edge of the horizontal portion 33. The horizontal portion 33 is arranged corresponding to the first water outlet 11, and the lower edge of the inclined portion 34 encloses a guide area 35 arranged corresponding to the impeller 2. With the above structure, the horizontal portion 33, on the one hand, blocks the first water outlet 11 and cooperates with the water baffle 32 to limit the water flow guided upward to achieve reasonable water distribution. On the other hand, the horizontal portion 33 cooperates with the inclined portion 34 to form a guide area 35 with an inner diameter gradually increasing from bottom to top. During the rotation of the impeller 2, the water stored in the guide area 35 is accelerated in the circumferential direction and guided to the bottom of the water supply gap 31 under the guidance of the conical inner surface, providing pre-acceleration and guide for the water flow guided upward through the water supply gap 31, which is conducive to increasing the pressure and injection head of this part of the water flow, thereby improving the cleaning effect.

[0041] The outer peripheral wall of the inclined portion 34 is provided with a plurality of guide blades 36 which are distributed at intervals along the circumference and extend spirally from bottom to top, and a guide channel 37 is formed between two adjacent guide blades 36 for conveying water from bottom to top under the guide area 35. This structure is conducive to converging and rectifying the water flow directed upward, reducing energy loss and improving water pumping efficiency. The horizontal portion 33 is located below the first water outlet 11 and has a spacing with the inner top wall of the pump housing 1. The upper end of the guide blade 36 is connected with the inner top wall of the pump housing 1. The guide blade 36 extending above the horizontal portion 33, the upper surface of the horizontal portion 33 and the inner top wall of the pump housing 1 together enclose a converging channel 38 for converging the water in the guide channel 37 to the first water outlet 11. This structure is conducive to rectifying and converging the water flow near the first water outlet 11, reducing the energy loss of the water flow.

[0042] In this embodiment, the inner edge of the water retaining plate 32 is connected to the lower edge of the inclined portion 34, and the outer edge is connected to the inner peripheral wall of the pump housing 1 below the second water outlet 12. The guide vane 36 is integrally formed with the water dividing member 3 and the inner wall of the pump housing 1, which is convenient for production and manufacturing, and improves the reliability and stability of the overall structure.

[0043] The inclined portion 34 of this embodiment is formed into an outwardly arched arc structure, and the inner surface of the arc structure forms a first guide surface 351 that can cooperate with the impeller 2 to accelerate the water in the guide area 35 in a circumferential direction. This structure is conducive to further improving the water flow acceleration and guide effect in the guide area. The outer surface of the arc structure forms a second guide surface 352, and the inner peripheral wall of the pump housing 1 is formed with an arc-shaped guide surface 14 with an inner diameter gradually decreasing from bottom to top in the portion corresponding to the second guide surface 352. The second guide surface 352 and the arc-shaped guide surface 14 together enclose a flow channel 15 that can guide the water flow spirally upward. This structure is conducive to further reducing the energy loss of the water flow and improving the water pressure of the water flow.

[0044] The impeller 2 is a centrifugal impeller, and the bottom of the centrifugal impeller is provided with an inlet 21 corresponding to the water suction port 13, and the side is provided with an outlet 22 corresponding to the inner wall of the pump housing 1, and the edge of the outlet 22 of the centrifugal impeller is arranged close to the lower end of the flow-gathering channel 15. This structure can draw the water flow guided through the edge of the diversion area 35 into the flow-gathering channel 15 and transport it upward, shortening the retention stroke of the accelerated water flow in the pump housing 1, reducing energy loss, and improving the water pumping effect.

[0045] In this embodiment, the lower edge of the inclined portion 34 forms an opening, and the diameter of the impeller 2 is smaller than the opening diameter. Since the water pump of this embodiment is an open water pump, the water inlet 13 at the bottom of the pump housing 1 is directly connected to the washing chamber 10 and is directly arranged corresponding to the impeller 2. The impeller 2 may have a certain amount of up and down movement. The above structure can eliminate the interference problem that may be caused by the up and down movement of the impeller.

[0046] A pressurizing surface 16 is provided on the side of the pump housing 1, which spirally extends from the first side edge of the second water outlet 12 to the second side edge along the water flow direction. The pressurizing surface 16 is located within the coverage area below the water retaining plate 32. A water outlet pipe section 19 tangentially connected to the pressurizing surface 16 is also provided at the second water outlet 12 of the pump housing 1. The pressurizing surface 16 can pressurize the water flow that is about to be output through the second water outlet 12 to increase the water pressure and injection head of this part of the water flow.

[0047] In this embodiment, the length of the water baffle plate 32 in the circumferential direction of the water diversion member 3 is determined according to the flow requirements of the first water outlet 11 and the second water outlet 12. The longer the water baffle plate 32 is, the greater the water flow of the second water outlet 12 is and the smaller the water flow of the first water outlet 11 is, and vice versa.

[0048] In order to facilitate assembly, a positioning column 17 is provided on the outer bottom wall of the pump housing 1 for constraining it on the inner bottom wall of the box body 5. When assembled, a water absorption gap is formed between the outer bottom wall of the pump housing 1 and the inner bottom wall of the box body 5. The positioning column 17 can be constrained at the bottom of the box body by plugging or screw connection. With the above structure, the position of the water suction port can also be lowered to prevent bubbles from being absorbed and affecting the energy efficiency of the water pump. There are at least two positioning columns 17 arranged around the outer periphery of the water suction port 13. The outer bottom wall of the pump housing 1 is also provided with a guide rib 18 arranged around the water suction port 13 for rectification. The guide rib 18 is arranged close to the positioning column 17. The guide rib 18 is shuttle-shaped and symmetrically arranged on both sides of the positioning column 17 and extends along the radial direction of the water suction port 13. After the positioning column 17 is set, the water flow at the water suction port 13 may be turbulent. The above-mentioned guide rib 18 is set to rectify and guide the water flow around the positioning column to avoid energy loss caused by turbulent water flow.

[0049] This embodiment can complete two-way water pumping by relying on only one impeller 2, and the overall structure is simple, which reduces the production cost; in addition, this embodiment maintains an open water flow system, which is convenient for disassembly and cleaning of the water flow system.

[0050] The existing water pump that supplies water to the first spray arm sucks water from the volute suction port, and is affected by centrifugal force and thrown out from the radial outlet. The characteristics of such a water pump are that the water discharge direction is perpendicular to the water suction direction, the space occupied is large, and the structure is difficult to arrange; the water flow supplied to the first spray arm by this embodiment can be thrown out in a straight line with the suction port, which simplifies the structure and reduces the flow channel loss; in addition, the water pump of this embodiment has a compact structure, occupies a small space, can be accommodated in the concave water cup at the bottom of the box body, and the water flow can be drained after washing is completed, so that there is no residual water in the water cup; the connecting pipe of the water pump is short, and the fluid loss is small; the water distribution component structure has good uniformity and low noise.

[0051] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A cleaning machine, comprising a housing (5) having a washing chamber (10) and an open water pump (A) arranged at the bottom of the housing (5), characterized in that: The open water pump (A) comprises A pump housing (1) is arranged in the washing chamber (10) and has 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; An impeller (2) is rotatably disposed in the lower part of the pump casing (1) and is used to provide water pumping power; a water dividing member (3) disposed in the pump casing (1) and located above the impeller (2); the water dividing member (3) is separated between the impeller (2) and the first water outlet (11); a water supply gap (31) is formed between the edge of the water dividing member (3) and the inner peripheral wall of the pump casing (1); a water baffle (32) is provided in the pump casing (1) and is capable of covering the water supply gap (31) between the second water outlet (12) and the corresponding edge of the water dividing member (3) to control the water flow rate of the second water outlet (12); The water distribution member (3) comprises a circular horizontal portion (33) and an inclined portion (34) extending gradually from the inside to the outside and from the top to the bottom along the radial direction from the edge of the horizontal portion (33); the horizontal portion (33) is arranged corresponding to the first water outlet (11); and the lower edge of the inclined portion (34) encloses a guide area (35) arranged corresponding to the impeller (2); The inclined portion (34) is formed into an outwardly arched arc structure, and the inner surface of the arc structure forms a first guide surface (351) that can cooperate with the impeller (2) to circumferentially accelerate water in the guide area (35); The inner edge of the water baffle (32) is connected to the lower edge of the inclined portion (34), and the outer edge is connected to the inner peripheral wall of the pump casing (1) below the second water outlet.

2. The cleaning machine according to claim 1, characterized in that: A plurality of guide blades (36) are arranged on the outer peripheral wall of the inclined portion (34) and are spaced apart in the circumferential direction and spirally extend from bottom to top. A guide channel (37) is formed between two adjacent guide blades (36) for conveying water below the guide area (35) from bottom to top.

3. The cleaning machine according to claim 2, characterized in that: The horizontal portion (33) is located below the first water outlet (11) and has a spacing with the inner top wall of the pump housing (1); the upper end of the guide blade (36) is connected to the inner top wall of the pump housing (1); the guide blade (36) extending above the horizontal portion (33) and the upper surface of the horizontal portion (33) and the inner top wall of the pump housing (1) together enclose a converging flow channel (38) for gathering water in the guide flow channel (37) to the first water outlet (11).

4. The cleaning machine according to claim 2, characterized in that: The guide blade (36) is integrally formed with the water distribution member (3) and the inner wall of the pump casing (1).

5. The cleaning machine according to claim 1, characterized in that: The outer surface of the arc-shaped structure forms a second guide surface (352), and the inner wall of the pump housing (1) is formed with an arc-shaped guide surface (14) whose inner diameter gradually decreases from bottom to top in a portion corresponding to the second guide surface (352), and the second guide surface (352) and the arc-shaped guide surface (14) together enclose a converging flow channel (15) capable of guiding the water flow spirally upward.

6. The cleaning machine according to claim 5, characterized in that: The impeller (2) is a centrifugal impeller (2), the bottom of which is provided with an inlet (21) corresponding to the water suction port (13), and the side of which is provided with an outlet (22) corresponding to the inner wall of the pump casing (1), and the edge of the outlet (22) of the centrifugal impeller (2) is arranged close to the lower end of the converging flow channel (15).

7. The cleaning machine according to claim 1, characterized in that: The lower edge of the inclined portion (34) forms an opening, and the diameter of the impeller (2) is smaller than the diameter of the opening.

8. The cleaning machine according to any one of claims 1 to 7, characterized in that: The pump housing (1) is provided with a pressurizing surface (16) on the side thereof, which spirally extends from a first side edge of the second water outlet (12) to a second side edge along the water flow direction; the pressurizing surface (16) is located within a covering area below the water baffle (32); and a water outlet pipe section (19) tangentially connected to the pressurizing surface (16) is also provided at the second water outlet (12) of the pump housing (1).

9. The cleaning machine according to any one of claims 1 to 7, characterized in that: The length of the water baffle plate (32) in the circumferential direction of the water diversion member (3) is determined according to the diversion flow requirements of the first water outlet (11) and the second water outlet (12).

10. The cleaning machine according to any one of claims 1 to 7, characterized in that: The outer bottom wall of the pump housing (1) is provided with a positioning column (17) for constraining it on the inner bottom wall of the box body (5); in the assembled state, a water absorption gap is formed between the outer bottom wall of the pump housing (1) and the inner bottom wall of the box body (5).

11. The cleaning machine according to claim 10, characterized in that: There are at least two positioning columns (17) arranged around the periphery of the water suction port (13); the outer bottom wall of the pump housing (1) is also provided with flow guide ribs (18) arranged around the water suction port (13) and used for flow rectification; the flow guide ribs (18) are arranged close to the positioning columns (17).

12. The cleaning machine according to claim 11, characterized in that: The guide ribs (18) are shuttle-shaped and are symmetrically arranged on both sides of the positioning column (17) and extend along the radial direction of the water suction port (13).

13. The cleaning machine according to any one of claims 1 to 7, characterized in that: A driving member (4) is provided at the outer bottom of the box body (5), and the output shaft of the driving member (4) passes through the bottom wall of the box body (5) and the water suction port (13) in an upward direction to be connected to the impeller (2).

14. The cleaning machine according to any one of claims 1 to 7, characterized in that: The invention also comprises a first spray arm (6) and a second spray arm (7), wherein the first spray arm (6) is rotatably arranged on the pump housing (1) and is connected to the first water outlet (11), and the second spray arm (7) is arranged in the middle or upper part of the washing chamber (10) and is connected to the second water outlet (12) through a water conduit.

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