An assembly structure of an open water pump and a cleaning machine

Abstract

The present invention relates to an assembly structure of an open water pump and a cleaning machine, wherein a cover plate is arranged transversely in the middle of a volute and its edge is arranged close to the inner wall of the volute, and the inner cavity of the volute is divided into an upper cavity and a lower cavity, the bottom edge of the guide vane is supported on the inner bottom wall of the volute, and the semi-enclosed structure formed by the guide vane is arranged close to the inner wall of the volute opposite to the second water outlet and is detachably connected to the inner wall of the volute, and the second water outlet is close to the inner wall of the volute and is connected to the upper cavity. The semi-enclosed structure formed by the guide vane is offset relative to the center of the cover plate, and the offset structure cooperates with the spiral structure of the guide vane to pressurize the water flow together, reduce energy loss, and make the water flow pressure meet the pumping demand on the basis of simplifying the water pump structure; during assembly, the circumferential constraint position of the cover plate in the volute can be used to control the size of the connection area between the first water outlet and the second water outlet, thereby adjusting the size of each water flow after diversion to meet the user's unique cleaning needs.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to an assembly structure of an open water pump and a washing machine. 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 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 dividing device, which divides the water flow into a first branch supplying water to the bottom spray arm and a second branch supplying water to the top 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 for bottom layer water supply and a lower impeller for upper layer water supply, the overall structure is relatively complex and the production cost is high. It is impossible to take into account the pumping effect while saving costs. At the same time, the water volume of the bottom layer water supply and the upper layer water supply is difficult to reasonably allocate. Summary of the invention

[0007] The first technical problem to be solved by the present invention is to provide an assembly structure of an open water pump that can adjust the flow rates of each stream of water after diversion according to production needs to meet corresponding cleaning needs in view of the current status of the existing technology.

[0008] The second technical problem to be solved by the present invention is to provide an assembly structure of an open water pump which can simplify the structure and improve the water pumping effect in view of the current status of the prior art.

[0009] The third technical problem to be solved by the present invention is to provide a cleaning machine with the assembly structure of the open water pump according to the current status of the prior art.

[0010] The technical solution adopted by the present invention to solve at least one of the above technical problems is:

[0011] An assembly structure of an open water pump, comprising a volute, and also comprising a space guide vane arranged in the volute;

[0012] The bottom of the volute is provided with a water inlet, the top of the volute is provided with a first water outlet, and the side of the volute is provided with a second water outlet;

[0013] The spatial guide vane includes a cover plate and a guide vane, the cover plate is disc-shaped, there are at least two guide vanes and they are vertically arranged on the lower surface of the cover plate, each of the guide vanes extends spirally along the circumferential direction at the edge of the cover plate and forms a semi-enclosed structure, the opening of the semi-enclosed structure forms a first water outlet, and the adjacent two guide vanes are partially staggered to enclose a second water outlet;

[0014] The cover plate is arranged horizontally in the middle of the volute and its edge is arranged close to the inner wall of the volute, dividing the inner cavity of the volute into an upper cavity and a lower cavity. The first water outlet is located at the top of the upper cavity, and the second water outlet is located at the side of the lower cavity. The bottom edge of the guide blade is supported on the inner bottom wall of the volute. The semi-enclosed structure formed by the guide blade is arranged close to the inner wall of the volute opposite to the second water outlet and is detachably connected to the inner wall of the volute. The second water diversion port is close to the inner wall of the volute and passes through the upper cavity.

[0015] Preferably, the semi-enclosed structure and the area within the inner wall of the volute form a functional area that can bidirectionally divert and pressurize the water flow, and the functional area is offset relative to the center of the volute. With such a structure, the offset structure cooperates with the spiral structure of the guide vane to jointly pressurize the water flow, which is conducive to further improving the pressurization effect, thereby reducing energy loss, and making the water flow pressure meet the water pumping requirements on the basis of simplifying the water pump structure.

[0016] In order to facilitate assembly, a slot extending up and down is provided on the inner wall of the volute, and correspondingly, a convex rib which can be matched and engaged with the slot is provided on the outer peripheral surface of the guide vane.

[0017] Preferably, the cross-sectional width of the convex rib gradually decreases outward from the outer surface of the guide vane, and the shape of the groove is adapted to the convex rib.

[0018] Preferably, the width of the upper portion of the slot is greater than the width of the lower portion, and there is a smooth transition between the upper sidewall and the lower sidewall of the slot. The smooth transition can be a gradually transitioning smooth curved surface or a transition inclined surface. The upper portion is large in width for easy installation, and the lower portion is small in width, which mainly plays a locking and positioning role.

[0019] In the present invention, the circumferential offset of the first water outlet relative to the second water outlet is used to control the water flow rate diverted through the first water outlet and the second water outlet. Along the circumferential flow direction of the water flow in the volute, the starting end of the guide vane close to the second water outlet is used to separate the water flow, that is, to divide a water flow into two. Some dishwasher users are accustomed to mainly using the spray part of the first water outlet to wash dishes and have a low utilization rate of the spray part of the second water outlet. Some dishwasher users have a high utilization rate of the spray parts of the first water outlet and the second water outlet. The water flow rate of the first water outlet and the second water outlet can be adjusted according to demand. For example, by rotating the cover plate, when the connecting area between the first water outlet and the second water outlet is larger, the water flow rate output through the second water outlet is larger and the water flow rate output through the first water outlet is smaller, and vice versa.

[0020] A guide port is formed at the connection between two adjacent guide blades for water from the second water diversion port to enter the upper cavity upward, so as to transport the water diverted through the second water diversion port upward.

[0021] Preferably, the upper surface of the cover plate is provided with a baffle extending upward, the top of the baffle abuts against the inner top wall and inner side wall of the volute, and the baffle and the inner wall of the volute together enclose a converging flow channel for gathering the water guided upward through the diversion port, and the converging flow channel has an opening arranged toward the first water outlet. This structure can rectify and gather the water transported upward to reduce energy loss and increase water pressure.

[0022] The open water pump of the present invention further comprises a centrifugal impeller and a driving member, wherein the centrifugal impeller is rotatably arranged in the lower cavity and within the semi-enclosed structure, and the driving member is arranged below the volute and the output shaft passes through the water suction port upwardly and is connected to the centrifugal impeller. The driving member drives the centrifugal impeller to rotate to achieve water pumping.

[0023] Preferably, a clearance groove corresponding to the output shaft of the driving member is provided in the central part of the lower surface of the cover plate. Since the present invention is an open water pump, there is an assembly gap between the driving member and the housing and the centrifugal impeller, which may cause the centrifugal impeller and the output shaft to move up and down. The above-mentioned clearance groove is provided to eliminate possible interference during the movement.

[0024] Preferably, the height of the centrifugal impeller is b2, the distance between the lower surface of the cover plate and the inner bottom wall of the volute is b3, and b3=(1.15-1.25)b2. This structure can improve the water pumping efficiency while taking into account the up and down displacement of the centrifugal impeller.

[0025] A cleaning machine comprises a casing, a bottom spray arm and a top spray arm, and also comprises an assembly structure of the above-mentioned open water pump, wherein a concave water return area is arranged at the bottom of the casing, and the top of the water return area is covered with a filter plate, the volute is arranged in the water return area, and a water suction gap is provided between the water suction port at the bottom of the volute and the bottom of the water return area, the first water outlet at the top of the volute is located above the filter plate and is connected with the water inlet of the bottom spray arm, and the top spray arm is arranged at the upper middle part of the casing and is connected with the second water outlet of the volute through a water supply pipe.

[0026] Compared with the prior art, the advantages of the present invention are: during the circumferential flow process, the water flow of the present invention is divided into two streams through the first water diversion port and the second water diversion port respectively, and the semi-enclosed structure formed by the guide blades is offset relative to the center of the cover plate. The offset structure cooperates with the spiral structure of the guide blades to jointly pressurize the water flow, which is beneficial to further improve the pressurization effect, thereby reducing energy loss, and on the basis of simplifying the water pump structure, making the water flow pressure meet the water pumping requirements; during assembly, the circumferential constraint position of the cover plate in the volute can be used to control the size of the connecting area between the first water diversion port and the second water outlet, thereby regulating the size of each water flow after diversion to meet the user's unique cleaning needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a partial structural schematic diagram of an open water pump in an embodiment of the present invention (with driving parts hidden);

[0028] Figure 2 for Figure 1 Schematic diagram of the bottom structure;

[0029] Figure 3 for Figure 1 The first cross-sectional view of

[0030] Figure 4 for Figure 1 The second cross-sectional view of

[0031] Figure 5 Schematic diagram of the structure of the space guide vane in an embodiment of the present invention;

[0032] Figure 6 for Figure 5 A schematic diagram of the structure from another angle;

[0033] Figure 7 It is a partial structural schematic diagram of the volute in an embodiment of the present invention;

[0034] Figure 8 is a bottom cross-sectional view of an open water pump according to an embodiment of the present invention;

[0035] Fig. 9 It is a partial structural schematic diagram of a cleaning machine in an embodiment of the present invention;

[0036] Fig.10 Schematic diagram of the structure of a cleaning machine in an embodiment of the present invention. DETAILED DESCRIPTION

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

[0038] like Figures 1 to 10 As shown, the open water pump in this embodiment includes a volute 1, a space guide vane 2, a centrifugal impeller 3 and a driving member 8. The assembly structure of the open water pump mainly emphasizes the assembly structure and positional relationship between the space guide vane and the volute, and the positional relationship between the space guide vane and the centrifugal impeller.

[0039] The main body of the volute 1 of this embodiment is cylindrical, with a water inlet 13 at the bottom, a first water outlet 11 at the top of the volute 1, and a second water outlet 12 at the side. The space guide vane 2 is arranged in the volute 1. The space guide vane 2 includes a cover plate 21 and a guide vane 22. The cover plate 21 is disc-shaped. There are at least two guide vanes 22 arranged vertically on the lower surface of the cover plate 21. Each guide vane 22 extends spirally along the circumferential direction at the edge of the cover plate 21 and forms a semi-enclosed structure A. The opening of the semi-enclosed structure A forms a first water outlet 201, and the adjacent two guide vanes 22 partially staggered to enclose a second water outlet 202. The cover plate 21 is arranged transversely in the middle of the volute 1 and its edge is arranged close to the inner wall of the volute 1, dividing the inner cavity of the volute 1 into an upper cavity 101 and a lower cavity 102. The first water outlet 11 is located at the top of the upper cavity 101, and the second water outlet 102 is located at the side of the lower cavity 102. The centrifugal impeller 3 is rotatably arranged in the lower cavity 102 and within the semi-enclosed structure A. The driving member 8 is a motor, which is arranged below the volute 1 and the output shaft 81 passes upward through the water suction port 13 and is connected to the centrifugal impeller 3. The driving member 8 drives the centrifugal impeller 3 to rotate, so as to achieve water pumping.

[0040] The bottom edge of the guide blade 22 is supported on the inner bottom wall of the volute 1, and the semi-enclosed structure A formed by the guide blade 22 is arranged close to the inner wall of the volute 1 opposite to the second water outlet 202 and is detachably connected to the inner wall of the volute 1. A guide port 203 is formed at the junction of two adjacent guide blades 22 for water from the second water outlet 202 to enter the upper cavity 101 upward. The second water outlet 202 is close to the inner wall of the volute 1 and is connected to the upper cavity 101 through the guide port 203, so as to transport the water diverted through the second water outlet 202 upward.

[0041] The semi-enclosed structure A and the area within the inner wall of the volute 1 form a functional area B that can bidirectionally divert and pressurize the water flow, and the functional area B is offset relative to the center of the volute 1. With such a structure, the offset structure cooperates with the spiral structure of the guide vane 22 to jointly pressurize the water flow, which is conducive to further improving the pressurization effect, thereby reducing energy loss, and making the water flow pressure meet the water pumping demand on the basis of simplifying the water pump structure.

[0042] In this embodiment, in order to facilitate assembly, a slot 14 extending up and down is provided on the inner wall of the volute 1, and correspondingly, a convex rib 224 is provided on the outer peripheral surface of the guide vane 22 to be engaged with the slot 14. The cross-sectional width of the convex rib 224 gradually decreases from the outer surface of the guide vane 22 outward, and the shape of the slot 14 is adapted to the convex rib 224. The width of the upper portion of the slot 14 is greater than the width of the lower portion, and there is a smooth transition between the upper side wall and the lower side wall of the slot 14. The smooth transition can be a gradually transitioning smooth curved surface or a transition inclined surface. The upper portion has a large width for easy installation, and the lower portion has a small width, which mainly plays a locking and positioning role.

[0043] In this embodiment, the circumferential offset of the first water outlet 201 relative to the second water outlet 12 is used to control the water flow rate diverted through the first water outlet 201 and the second water outlet 202. Along the circumferential flow direction of the water flow in the volute 1, the starting end of the guide vane 22 close to the second water outlet 12 is used to separate the water flow, that is, to divide a water flow into two. Some dishwasher users are accustomed to mainly using the spray part of the first water outlet 11 to wash dishes and have a low utilization rate of the spray part of the second water outlet 12. Some dishwasher users have a high utilization rate of the spray parts of the first water outlet 11 and the second water outlet 12. The water flow rate of the first water outlet 11 and the second water outlet 12 can be adjusted according to demand. For example, the cover plate 21 is rotated. When the communication area between the first water outlet 201 and the second water outlet 11 is larger, the water flow rate output through the second water outlet 12 is larger and the water flow rate output through the first water outlet 11 is smaller, and vice versa.

[0044] A clearance groove 211 corresponding to the output shaft 81 of the driving member 8 is provided in the central part of the lower surface of the cover plate 21. Since the present embodiment is an open water pump, there is an assembly gap between the driving member 8 and the casing and the centrifugal impeller 3, which may cause the centrifugal impeller 3 and the output shaft 81 to move up and down. The clearance groove 211 is provided to eliminate possible interference during the movement.

[0045] The height of the centrifugal impeller 3 in this embodiment is b2, and the distance between the lower surface of the cover plate 21 and the inner bottom wall of the volute 1 is b3, b3 = (1.15-1.25) b2. This structure can improve the pumping efficiency while taking into account the up and down displacement of the centrifugal impeller 3.

[0046] In this embodiment, along the circumferential flow direction of the water flow, the starting end of the guide vane 22 is located within the edge of the cover plate 21, and a diversion structure 2211 is formed for dividing the water flow into the functional area B or the first water diversion port 201; the end of the guide vane 22 is located on the outer circumference of the cover plate 21. In the assembled state, the edge of the cover plate 21 is tightly attached to the inner wall surface of the water pump volute and forms a seal, and only a partial opening is left at the second water diversion port 202 to allow water to flow upward through the second water diversion port 202. The above-mentioned diversion structure is conducive to improving the water diversion effect and reducing energy loss, and the end of the guide vane 22 is located on the outer circumference of the cover plate 21, which can improve the assembly sealing between the space guide vane 2 and the water pump volute, avoid water leakage and ensure that the water flow has a higher water pressure and head.

[0047] Specifically, the projection of the outer wall of the guide blade 22 on the horizontal plane is located on the outer circumference of the cover plate 21, and the distance from the inner wall of the guide blade 22 to the center of the cover plate 21 gradually increases along the water flow direction, thereby forming a pressurized curved surface 220 for pressurizing the water to be pumped out through the second water diversion port 202. The pressurized curved surface 220 can pressurize the water flow to increase the pressure and head of the output water flow, thereby improving the cleaning effect.

[0048] The guide vane 22 of this embodiment includes a first guide vane 221, a second guide vane 222, and a third guide vane 223. Along the flow direction of the water flow in the circumferential direction, the starting end of the first guide vane 221 forms a diversion structure 2211, and the end is located at the outer edge of the cover plate 21 and is used to constrain the corresponding second water diversion port 202. The starting end of the second guide vane 222 is used to constrain the corresponding second water diversion port 202, and the end is located on the outer circumference of the cover plate 21. The third guide vane 223 is located between the first guide vane 221 and the second guide vane 222. The second water diversion port 202 is constrained between the starting end of the third guide vane 223 and the end of the first guide vane 221, and between the end of the third guide vane 223 and the starting end of the second guide vane 222. The distance from the starting end of the first guide vane 221 to the center of the cover plate 21 is smaller than the distance from the starting end of the second guide vane 222 to the center of the cover plate 21. This structure is conducive to improving the water diversion effect and reducing energy loss. A guide port 203 is formed at the connection between two adjacent guide blades 22 for water from the second water diversion port 202 to flow upward into the cover plate 21 , so as to transport the water flow upward according to demand. The above-mentioned guide vanes have the following functions: (1) the first guide vane 221, the second guide vane 222, and the third guide vane 223 cooperate to pressurize the water flow in all water pump volutes in the circumferential direction; (2) the starting end of the first guide vane 221 is used to divert water in the circumferential direction, so that part of the water is output through the first water diversion port 201, and the other part of the water continues to flow circumferentially in the functional area, and most of the water is output through the second water diversion port 202; (3) since each guide vane 22 extends spirally, the inner circumferential wall of the second guide vane 202 pressurizes the water that is about to be output through the first water diversion port 201; (4) the first guide vane 221, the second guide vane 222, and the third guide vane 223 jointly enclose two guide ports 203, and the two guide ports 203 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 improving the water pressure of the water output through the second water diversion port 202.

[0049] In this embodiment, the upper surface of the cover plate 21 is provided with a baffle plate 23 extending upward, the top of the baffle plate 23 abuts against the inner top wall and inner side wall of the volute 1, and the baffle plate 23 and the inner wall of the volute 1 together enclose a converging flow channel 230 for gathering the water guided upward through the guide port 203, and the converging flow channel 230 has an opening arranged upward. The baffle plate 23 includes an arc segment 231 located in the central part of the cover plate 21, a first curved surface segment 232 smoothly extending from the first end of the arc segment 231 to the first edge of the guide port 203, and a second curved surface segment 233 smoothly extending from the second end of the arc segment 231 to the second edge of the guide port 203. The above structure can rectify and gather the water transported upward to reduce energy loss and increase water pressure. Since the guide ports 203 of this embodiment are in two groups and are spaced apart in the circumferential direction of the cover plate 21, the baffle 23 also includes a third curved surface segment 234 provided between the first curved surface segment 232 and the second curved surface segment 233. The third curved surface segment 234 is used to separate the converging flow channel 230 into branch flow channels corresponding to different guide ports 203. The outer end of the third curved surface segment 234 is connected to the top of the guide blade 22 between the two guide ports 203, and the inner end is close to the opening of the arc segment 231. The two branch flow channels converge before entering the opening of the arc segment 231 to further guide and rectify the water flow and reduce water flow interference and energy loss.

[0050] The cleaning machine of this embodiment includes a housing 4, a bottom spray arm 5 and a top spray arm 6, and also includes the above-mentioned open water pump. A concave water return area 41 is provided at the bottom of the housing 4, and the top of the water return area 41 is covered with a filter plate 42. The volute 1 is provided in the water return area 41. There is a water suction gap between the water suction port 13 at the bottom of the volute 1 and the bottom of the water return area 41. The first water outlet 11 at the top of the volute 1 is located above the filter plate 42 and is connected to the water inlet of the bottom spray arm 5. The top spray arm 6 is provided in the upper middle part of the housing 4 and is connected to the second water outlet 12 of the volute 1 through the water supply pipe 7. A driving member 8 is provided at the bottom of the housing 4, and the output shaft 81 of the driving member 8 passes upward through the bottom wall of the housing 4 and is connected to the centrifugal impeller 3 to drive the impeller 3 to rotate.

[0051] During the circumferential flow of the water flow in the volute 1, it is divided into two streams through the first water diversion port 201 and the second water diversion port 202 respectively. The semi-enclosed structure A formed by the guide blade 22 is offset relative to the center of the cover plate 21. The offset structure cooperates with the spiral structure of the guide blade 22 to jointly pressurize the water flow, which is beneficial to further improve the pressurization effect, thereby reducing energy loss, and making the water flow pressure meet the water pumping demand on the basis of simplifying the water pump structure; during assembly, the circumferential constraint position of the cover plate 21 in the volute 1 can be used to control the size of the connecting area between the first water diversion port 201 and the second water outlet 12, thereby adjusting the size of each water flow after diversion to meet the user's unique cleaning needs.

[0052] 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. An assembly structure of an open water pump, comprising a volute (1), characterized in that: It also includes a space guide vane (2) arranged in the volute (1); The volute (1) has a water inlet (13) at the bottom, a first water outlet (11) at the top, and a second water outlet (12) at the side. The spatial guide vane (2) comprises a cover plate (21) and a guide vane (22); the cover plate (21) is disc-shaped; there are at least two guide vanes (22) arranged vertically on the lower surface of the cover plate (21); each guide vane (22) extends spirally along the circumferential direction at the edge of the cover plate (21) to form a semi-enclosed structure (A); a first water diversion port (201) is formed at the opening of the semi-enclosed structure (A); and a second water diversion port (202) is partially staggered between two adjacent guide vanes (22); The cover plate (21) is arranged transversely in the middle of the volute (1) and its edge is arranged close to the inner wall of the volute (1), dividing the inner cavity of the volute (1) into an upper cavity (101) and a lower cavity (102); the first water outlet (11) is located at the top of the upper cavity (101), and the second water outlet (12) is located at the side of the lower cavity (102); the bottom edge of the guide blade (22) is supported on the inner bottom wall of the volute (1); the semi-enclosed structure (A) formed by the guide blade (22) is arranged close to the inner wall of the volute (1) opposite to the second water outlet (12) and is detachably connected to the inner wall of the volute (1); the second water outlet (202) is close to the inner wall of the volute (1) and is connected to the upper cavity (101).

2. The assembly structure of the open water pump according to claim 1, characterized in that: The semi-enclosed structure (A) and the area within the inner wall of the volute (1) form a functional area (B) capable of bidirectionally diverting and pressurizing water flow, and the functional area is offset relative to the center of the volute (1).

3. The assembly structure of the open water pump according to claim 2, characterized in that: The inner wall of the volute (1) is provided with a slot (14) extending up and down, and correspondingly, the outer peripheral surface of the guide vane (22) is provided with a convex rib (224) that can be matched and engaged with the slot (14).

4. The assembly structure of the open water pump according to claim 3, characterized in that: The cross-sectional width of the convex rib (224) gradually decreases outward from the outer surface of the guide vane (22), and the shape of the clamping groove (14) is compatible with the convex rib (224).

5. The assembly structure of the open water pump according to claim 3, characterized in that: The width of the upper portion of the card slot (14) is greater than the width of the lower portion, and the upper side wall and the lower side wall of the card slot (14) are smoothly transitioned.

6. The assembly structure of the open water pump according to claim 3, characterized in that: The circumferential offset of the first water diversion port (201) relative to the second water outlet (12) is used to control the flow rate of water diverted through the first water diversion port (201) and the second water diversion port (202).

7. The assembly structure of an open water pump according to any one of claims 1 to 6, characterized in that: A guide port (203) is formed at the connection point between two adjacent guide blades (22) for water from the second water outlet (202) to flow upward into the upper cavity.

8. The assembly structure of the open water pump according to claim 7, characterized in that: The upper surface of the cover plate (21) is provided with a baffle (23) extending upward, the top of the baffle (23) abuts against the inner top wall and inner side wall of the volute (1), and the baffle (23) and the inner wall of the volute (1) together enclose a converging flow channel (230) for collecting water guided upward through the guide port (203), and the converging flow channel (230) has an opening arranged toward the first water outlet (11).

9. The assembly structure of an open water pump according to any one of claims 1 to 6, characterized in that: It also comprises a centrifugal impeller (3) and a driving member (8), wherein the centrifugal impeller (3) is rotatably disposed in the lower cavity (102) and within the semi-enclosed structure (A), and the driving member (8) is disposed below the volute (1) and the output shaft (81) passes upward through the water suction port (13) and is connected to the centrifugal impeller (3).

10. The assembly structure of the open water pump according to claim 9, characterized in that: A clearance groove (211) corresponding to the output shaft (81) of the driving member (8) is provided in the central part of the lower surface of the cover plate (21).

11. The assembly structure of the open water pump according to claim 9, characterized in that: The height of the centrifugal impeller (3) is b2, and the distance between the lower surface of the cover plate (21) and the inner bottom wall of the volute (1) is b3, where b3=(1.15-1.25)b2.

12. A cleaning machine, comprising a housing (4), a bottom spray arm (5) and a top spray arm (6), characterized in that: It also includes an assembly structure of an open water pump according to any one of claims 1 to 11, wherein a concave water return area (41) is provided at the bottom of the casing (4), and the top of the water return area (41) is covered with a filter plate (42), the volute (1) is arranged in the water return area (41), and a water suction gap is provided between the water suction port (13) at the bottom of the volute (1) and the bottom of the water return area (41), the first water outlet (11) at the top of the volute (1) is located above the filter plate (42) and is connected to the water inlet of the bottom spray arm (5), and the top spray arm (6) is arranged in the upper middle part of the casing (4) and is connected to the second water outlet (12) of the volute (1) through a water supply pipe (7).

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