A space guide vane and an open water pump and a cleaning machine

Abstract

The present invention relates to a space guide vane and an open water pump and a cleaning machine. The space guide vane includes a cover plate and a guide vane. There are multiple guide vanes and they are arranged vertically on the lower surface of the cover plate. The multiple guide vanes are arranged at intervals in the circumferential direction of the cover plate and spirally extend from the edge of the cover plate inward against the direction of the water flow. The cover plate is divided into a first part and a second part that are connected to each other in the circumferential direction. The guide vane is arranged corresponding to the first part, and an opening is formed at the second part. The cover plate portion corresponding to the top of the guide vane is at least partially missing to form a gap for connecting the water diversion channel with the top of the cover plate. The inside of the guide vane encloses a water diversion channel for diverting one water flow, and the outside of the guide vane encloses an opening for diverting another water flow. The water flow is automatically diverted into two streams during the circumferential flow process, eliminating the interference problem of the diverted water flow and avoiding the loss of water flow energy. On the basis of simplifying the water pump structure, the water flow pressure meets the water pumping demand and improves the water pumping efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to a space guide vane, 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 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 first technical problem to be solved by the present invention is to provide a spatial guide vane with both water distribution and pressurization functions in view of the current status of the prior art, thereby simplifying the water pump structure and improving the water pumping efficiency.

[0008] The second technical problem to be solved by the present invention is to provide an open water pump using the above-mentioned spatial guide vanes 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 using the above-mentioned open water pump in view of the current status of the prior art.

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

[0011] A space guide vane comprises a cover plate and a guide piece, wherein the guide piece is multiple and vertically arranged on the lower surface of the cover plate, the multiple guide pieces are arranged at intervals in the circumferential direction of the cover plate and spirally extend inward from the edge of the cover plate against the direction of water flow, the cover plate is divided into a first part and a second part which are connected to each other in the circumferential direction, the guide piece is arranged corresponding to the first part, an opening is formed in the second part, a water diversion channel is constrained between two adjacent guide pieces, and the cover plate portion corresponding to the top of the guide piece is at least partially missing to form a gap for connecting the water diversion channel with the top of the cover plate.

[0012] Preferably, the cover plate is disc-shaped, and the projection of the outer end of the guide plate on the horizontal plane is located at the edge of the disc-shaped cover plate. Each of the guide plates encloses a semi-enclosed cavity in the circumferential direction of the cover plate for pressurizing and circumferentially diverting the water flow under the cover plate. The opening forms a first diversion outlet of the semi-enclosed cavity, and the water outlet end of the water diversion channel forms a second diversion outlet of the semi-enclosed cavity. The guide vane of the present invention has the following functions: (1) forming a semi-enclosed cavity, the edge of which divides the output water flow into two streams in the circumferential direction, thereby playing a diversion role; at the same time, the semi-enclosed cavity pressurizes the water flow entering it along the circumferential direction to increase the output head; (2) the guide vane encloses a water diversion channel, so that one of the diverted water flows can be better connected with the upper cavity through the gap, thereby reducing energy loss and increasing water pressure and head; (3) the semi-enclosed cavity 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 jointly pressurize the water flow, which is conducive to further improving the pressurization effect and thus reducing energy loss.

[0013] Preferably, in two adjacently arranged guide plates, the outer end portion of the first guide plate and the inner end portion of the second guide plate are arranged in an interlaced manner to enclose the water diversion channel, and the cover plate is missing in the range from the outer end of the first guide plate to the outer end of the second guide plate to form the gap. With such a structure, the gap is reasonably connected with the water outlet end of the water diversion channel, reducing energy loss.

[0014] Preferably, the upper surface of the cover plate is provided with a converging blade that spirally extends from the edge to the middle and is used to gather the water flow transported through the notch to the upper part of the central part. This structure can rectify and guide the water flow on the cover plate, avoid energy loss caused by turbulent water flow, and increase water pressure and head.

[0015] Further preferably, the upper surface of the cover plate is provided with a guide cone which gradually extends upward from the edge to the middle, the converging blades are multiple and arranged at intervals in the circumferential direction of the cover plate, and the upper part of the converging blades is connected with the outer surface of the guide cone.

[0016] Further preferably, the upper edge of the converging blade is lower than the upper end of the guide cone. This structure is used to eliminate water flow interference near the tip of the guide cone and reduce energy loss.

[0017] Preferably, the upper surface height of the cover plate corresponding to the first part is lower than the upper surface height of the second part, and the lower end of the converging blade is connected to the top edge of the notch. This structure reduces the climbing height of the water flow output through the water diversion channel, and is then guided upward by the converging blade at the notch, which is conducive to further reducing energy loss and improving water pumping effect.

[0018] An open water pump, comprising:

[0019] A pump housing, with a water inlet at the bottom, a first water outlet at the top and a second water outlet at the side;

[0020] The space guide vane, the cover plate is transversely arranged in the middle of the pump casing and divides the inner cavity of the pump casing into relatively independent upper cavity and lower cavity, the first water outlet is connected to the upper cavity, and the second water outlet is connected to the lower cavity; and

[0021] The impeller is rotatably arranged in the lower cavity and is used to provide water-drawing power.

[0022] Preferably, along the water flow direction, the starting end of the first part is connected to the first edge of the second water outlet, and the end is arranged opposite to the first edge of the second water outlet. The outer end of the guide plate corresponding to the starting end of the first part is connected to the first edge of the second water outlet, and the inner end spirally extends against the water flow direction, and the inner end of the guide plate constitutes a diversion end for dividing the water flow. This structure is conducive to better pressurization and diversion of the water flow and reduces energy loss.

[0023] A cleaning machine comprises a box body, a first spray arm and a second spray arm, and also comprises the above-mentioned open water pump, the bottom of the box body is provided with a concave return water area, the pump casing is arranged in the return water area, and there is a water suction gap between the water suction port at the bottom of the pump casing and the bottom of the return water area, the first spray arm is arranged on the pump casing and is connected with the first water outlet, and the second spray arm is arranged on the first spray arm and is connected with the second water outlet through a water supply pipe.

[0024] Compared with the prior art, the advantages of the present invention are: the present invention provides a spatial guide vane structure for an open water pump, a guide vane located at the edge of the spatial guide vane and extending spirally, a water diversion channel for one water flow to be separated inside the guide vane, and an opening for another water flow to be separated outside the guide vane. The water flow is automatically diverted into two streams during the circumferential flow process, eliminating the interference problem of the diverted water flow, avoiding the loss of water flow energy, and on the basis of simplifying the water pump structure, the water flow pressure meets the water pumping demand, thereby improving the water pumping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the space guide vane in an embodiment of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the bottom structure;

[0027] Figure 3 is a side view of a space guide vane in an embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of an open water pump in an embodiment of the present invention;

[0029] Figure 5 for Figure 4 A schematic diagram of the structure from another angle;

[0030] Figure 6 It is a schematic diagram of the structure of the upper part of the hidden pump casing of an open water pump in an embodiment of the present invention;

[0031] Figure 7 It is a cross-sectional view (longitudinal section) of an open water pump in an embodiment of the present invention;

[0032] Figure 8 It is a cross-sectional view (cross section) of an open water pump in an embodiment of the present invention;

[0033] Fig. 9 Schematic diagram of the structure of a cleaning machine in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings.

[0035] like Figures 1 to 9 As shown, the spatial guide vane of this embodiment includes a cover plate 2 and a guide piece 21. The cover plate 2 is disc-shaped. There are multiple guide pieces 21 and they are vertically arranged on the lower surface of the cover plate 2. The multiple guide pieces 21 are arranged at intervals in the circumferential direction of the cover plate 2 and spirally extend inward from the edge of the cover plate 2 against the direction of the water flow. The cover plate 2 is divided into a first part 201 and a second part 202 that are connected to each other in the circumferential direction. The guide piece 21 is arranged corresponding to the first part 201, and an opening 22 is formed at the second part 202. A water diversion channel 23 is constrained between two adjacent guide pieces 21, and the part of the cover plate 2 corresponding to the top of the guide piece 21 is at least partially missing to form a gap 24 for connecting the water diversion channel 23 with the top of the cover plate 2.

[0036] The projection of the outer end of the guide plate 21 of this embodiment on the horizontal plane is located at the edge of the disc-shaped cover plate 2. Each guide plate 21 encloses a semi-enclosed cavity 100 circumferentially of the cover plate 2 for pressurizing and circumferentially diverting the water flow under the cover plate 2. The opening 22 forms a first diversion outlet of the semi-enclosed cavity 100, and the water outlet end of the water diversion channel 23 forms a second diversion outlet of the semi-enclosed cavity 100. The guide plate 21 of this embodiment has the following functions: (1) forming a semi-enclosed cavity 100, the edge of which divides the output water flow into two streams in the circumferential direction, thereby playing a diversion role; at the same time, the semi-enclosed cavity 100 pressurizes the water flow entering it along the circumferential direction to increase the output head; (2) the guide plate 21 encloses a water diversion channel 23, so that one of the diverted water flows can be better connected with the upper cavity through the notch 24, thereby reducing energy loss and increasing water pressure and head; (3) the semi-enclosed cavity 100 formed by the guide plate 21 is offset relative to the center of the cover plate 2. The offset structure cooperates with the spiral structure of the guide plate 21 to jointly pressurize the water flow, which is conducive to further improving the pressurization effect and thus reducing energy loss.

[0037] In the two adjacent guide plates 21, the outer end portion of the first guide plate 21 and the inner end portion of the second guide plate 21 are arranged in an interlaced manner to enclose the water diversion channel 23, and the cover plate 2 is missing in the range from the outer end of the first guide plate 21 to the outer end of the second guide plate 21 to form the gap 24. With such a structure, the gap 24 is reasonably connected with the water outlet end of the water diversion channel 23, reducing energy loss.

[0038] The open water pump of this embodiment includes a pump housing 1, a space guide vane, an impeller 3 and a driving member 4. A water inlet 13 is provided at the bottom of the pump housing 1, a first water outlet 11 is provided at the top of the pump housing 1, and a second water outlet 12 is provided at the side. A cover plate 2 of the space guide vane is transversely arranged in the middle of the pump housing 1 and divides the inner cavity of the pump housing 1 into relatively independent upper cavity 101 and lower cavity 102. The first water outlet 11 is connected to the upper cavity 101, and the second water outlet 12 is connected to the lower cavity 102. The impeller 3 is rotatably arranged in the lower cavity 102 to provide water pumping power.

[0039] Along the water flow direction, the starting end of the first part 201 is connected to the first edge 121 of the second water outlet 12, and the end is arranged opposite to the first edge 121 of the second water outlet 12. The outer end of the guide piece 21 corresponding to the starting end of the first part 201 is connected to the first edge 121 of the second water outlet 12, and the inner end spirally extends against the water flow direction, and the inner end of the guide piece 21 constitutes a diversion end 211 for dividing the water flow. This structure is conducive to better pressurization and diversion of the water flow and reduces energy loss.

[0040] The pump housing 1 is provided with a water outlet channel 14 tangentially connected to the second water outlet 12 on the side thereof, the first side wall of the water outlet channel 14 is connected to the first edge 121 of the second water outlet 12 and tangentially connected to the outer wall of the guide plate 21 arranged there, and the second side wall of the water outlet channel 14 is tangentially connected to the second edge 122 of the second water outlet 12. This structure can reduce energy loss.

[0041] The first water outlet 11 is provided at the central part of the top wall of the pump housing 1, and the upper surface of the cover plate 2 is provided with a converging blade 25 that spirally extends from the edge to the middle and is used to gather the water flow transported through the gap to the first water outlet 11. This structure can rectify and guide the water flow entering the upper cavity 101, avoid energy loss caused by water flow turbulence, and improve water pressure and head. The upper surface of the cover plate 2 is provided with a guide cone 26 that gradually extends upward from the edge to the middle, and the tip of the guide cone 26 is arranged corresponding to the first water outlet 11. There are multiple converging blades 25 and they are arranged at intervals in the circumferential direction of the cover plate 2, and the upper part of the converging blade 25 is connected to the outer surface of the guide cone 26. This structure can rectify and guide the water flow entering the upper cavity 101, avoid energy loss caused by water flow turbulence, and improve water pressure and head. The upper edge of the converging blade 25 is lower than the upper end of the guide cone 26. This structure is used to eliminate water flow interference near the first water outlet 11 and reduce energy loss.

[0042] The upper surface height of the cover plate 2 corresponding to the first part 201 is lower than the upper surface height of the second part 202, and the lower end of the converging blade 25 is connected to the top edge of the notch 24. This structure reduces the climbing height of the water flow output through the water diversion channel 23, and then the converging blade 25 guides the water flow upward at the notch 24, which is conducive to further reducing energy loss and improving water pumping effect.

[0043] The inner peripheral wall of the pump housing 1 corresponding to the upper cavity 101 extends from bottom to top and from outside to inside to form a guide surface 16 that gradually converges toward the first water outlet 11. The outer edge of the converging blade 25 contacts the guide surface 16, and the guide surface 16, the outer surface of the guide cone 26, and the converging blades 25 jointly enclose a rectifying channel 17. The rectifying channel 17 can not only avoid energy loss caused by water flow turbulence, but also further pressurize the output water flow to increase the water pressure and lift.

[0044] The cleaning machine of this embodiment includes a box body 7, a first spray arm 5 and a second spray arm 7, and also includes the above-mentioned open water pump. A concave return water area 71 is provided at the bottom of the box body 7, and the pump housing 1 is arranged in the return water area 71. A water suction gap 42 is provided between the water suction port 13 at the bottom of the pump housing 1 and the bottom of the return water area 71. The first spray arm 5 is arranged on the pump housing 1 and is connected to the first water outlet 11. The second spray arm 6 is arranged on the first spray arm 5 and is connected to the second water outlet 12 through the water supply pipe 8.

[0045] In this embodiment, a cover plate 2 and a guide plate 21 are provided in the pump casing 1. The cover plate 2 and the guide plate 21 are integrally formed, and the cover plate 2 and the guide plate 21 enclose a structure with both pressurization and diversion functions. One water path after diversion is output through the first water outlet 11 on the top of the pump casing 1, and the other water path is output through the second water outlet 12 on the side of the pump casing 1, thereby eliminating the interference problem of the two water outlets, reducing the energy loss of the water flow, and allowing the two water outlets to maintain a higher head and a larger water flow rate; in this embodiment, water pumping can be completed by relying on only one impeller 3, the overall structure is simple, and the production cost is reduced; in addition, this embodiment maintains an open water flow system, which is convenient for disassembly and cleaning of the water flow system.

[0046] 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 space guide vane, characterized in that: The invention comprises a cover plate (2) and a guide plate (21), wherein the guide plates (21) are multiple and arranged vertically on the lower surface of the cover plate (2), the multiple guide plates (21) are arranged at intervals in the circumferential direction of the cover plate (2) and spirally extend inward from the edge of the cover plate (2) in the opposite direction of the water flow, the cover plate (2) is divided into a first part (201) and a second part (202) which are connected to each other in the circumferential direction, the guide plates (21) are arranged corresponding to the first part (201), an opening (22) is formed in the second part (202), a water diversion channel (23) is constrained between two adjacent guide plates (21), and the part of the cover plate (2) corresponding to the top of the guide plate (21) is at least partially missing to form a notch (24) for connecting the water diversion channel (23) with the upper part of the cover plate.

2. The spatial guide vane according to claim 1, characterized in that: The cover plate (2) is in the shape of a disk, the projection of the outer end of the guide plate (21) on a horizontal plane is located at the edge of the disk-shaped cover plate, each of the guide plates (21) encloses a semi-enclosed cavity (100) in the circumferential direction of the cover plate (2) for pressurizing and circumferentially diverting the water flow under the cover plate, the opening forms a first diversion outlet of the semi-enclosed cavity (100), and the water outlet end of the water diversion channel forms a second diversion outlet of the semi-enclosed cavity (100).

3. The spatial guide vane according to claim 2, characterized in that: In the two adjacently arranged guide plates (21), the outer end portion of the first guide plate (21) and the inner end portion of the second guide plate (21) are arranged in an interlaced manner to enclose the water diversion channel (23), and the cover plate (2) is missing in the range from the outer end of the first guide plate (21) to the outer end of the second guide plate (21) to form the notch (24).

4. The spatial guide vane according to claim 3, characterized in that: The upper surface of the cover plate (2) is provided with a converging blade (25) which spirally extends from the edge toward the middle and is used to gather the water flow conveyed through the notch (24) to the upper part of the central part.

5. The spatial guide vane according to claim 4, characterized in that: The upper surface of the cover plate (2) is provided with a guide cone (26) which gradually extends upward from the edge to the middle, and the converging blades (25) are multiple and arranged at intervals in the circumferential direction of the cover plate (2), and the upper part of the converging blades (25) is connected to the outer surface of the guide cone (26).

6. The spatial guide vane according to claim 5, characterized in that: The upper edge of the converging blade (25) is lower than the upper end of the guide cone (26).

7. The spatial guide vane according to claim 4, characterized in that: The height of the upper surface of the cover plate (2) corresponding to the first part (201) is lower than the height of the upper surface of the second part (202), and the lower end of the converging blade (25) is connected to the top edge of the notch (24).

8. An open water pump, characterized in that include: A pump housing (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 according to any one of claims 1 to 7, wherein the cover plate (2) is transversely arranged in the middle of the pump casing (1) and divides the inner cavity of the pump casing (1) into relatively independent upper cavity (101) and lower cavity (102), the first water outlet (11) is connected to the upper cavity (101), and the second water outlet (12) is connected to the lower cavity (102); and An impeller (3) is rotatably disposed in the lower cavity (102) and is used to provide water-drawing power.

9. The open water pump according to claim 8, characterized in that: Along the water flow direction, the starting end of the first part (201) is connected to the first edge (121) of the second water outlet (12), and the end is arranged opposite to the first edge (121) of the second water outlet (12); the outer end of the guide plate (21) corresponding to the starting end of the first part (201) is connected to the first edge (121) of the second water outlet (12), and the inner end extends spirally against the water flow direction, and the inner end of the guide plate (21) constitutes a diversion end (211) for dividing the water flow.

10. A cleaning machine, comprising a housing (7), a first spray arm (5) and a second spray arm (6), characterized in that: It also includes an open water pump as described in claim 8 or 9, wherein a concave return water area (71) is provided at the bottom of the box body (7), the pump housing (1) is arranged in the return water area (71), and a water suction gap is provided between the water suction port (13) at the bottom of the pump housing (1) and the bottom of the return water area (71), the first spray arm (5) is arranged on the pump housing and is connected to the first water outlet (11), and the second spray arm (6) is arranged on the first spray arm (5) and is connected to the second water outlet (12) through a water supply pipe (8).

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