Impeller for water pump of cleaning machine, water pump and cleaning machine

Abstract

The impeller comprises an upper cover plate, a lower cover plate and a plurality of blades, a water suction port is formed in the center of the lower cover plate, the blades extend between the upper cover plate and the lower cover plate in the radial direction of the impeller, water outlets are formed in the outer ends of the blades, and the water suction port is communicated with the water suction port. The outer ends of the blades are provided with notches extending inwards from the outer edges of the blades, and the notches form a dredging structure allowing gathered fluid to penetrate through. The notches are formed in the outer edges of the blades at the water outlet of the impeller, and when fluid gathers at a water pump baffle tongue along with drawing of the impeller, part of water flow can flow through the notches in the ends of the blades, so that collision between circulating fluid and gathered fluid is reduced, flow-induced noise can be eliminated, and vibration of the water pump is reduced; and meanwhile, the notch can qualitatively dredge the flowing fluid, so that the fluid at the baffle tongue is uniformly distributed, a flow field is prevented from being disordered, the flow field is stable, and the operation stability and the water pumping effect of the water pump are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to an impeller for a washing machine water pump, a water pump and a washing machine. Background Art

[0002] Dishwashers have been widely used in home kitchens. Dishwashers are generally provided with a spray arm for spraying water, a concave water return area is provided at the bottom of the cabinet, the top of the water return area is covered with a filter plate, and a water pump is used to pump water from the water return area to the spray arm above the filter plate to realize the circulation spraying of washing water.

[0003] The applicant's prior patent application CN202410050010.X "Water Pump and Cleaning Machine for Cleaning Machine" discloses a structure, wherein the water pump also includes a pump housing, an impeller and a driving member, wherein the impeller is rotatably arranged in the pump housing, the driving member is arranged under the pump housing and the output shaft passes through the bottom of the pump housing upward and is connected to the impeller in the pump housing. The water pump is arranged in the washing chamber of the cleaning machine to form an open water pump, and the impeller of the water pump is a centrifugal impeller.

[0004] For the above-mentioned water pump structure, a baffle is provided in the pump casing of the centrifugal pump. The fluid continuously gathers near the baffle, which will lead to uneven distribution of the fluid there, easily forming a vortex group, making the flow field turbulent and affecting the water pumping effect; at the same time, the rotation of the impeller drives the upstream fluid to obtain a certain kinetic energy. When it enters the baffle flow channel of the pump casing through the impeller outlet, it will collide with the fluid gathered there at a certain speed, thereby causing the fluid to vibrate and generate noise, inducing flow-induced noise, and seriously affecting the operating stability of the water pump. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide an impeller for a cleaning machine water pump that can eliminate flow noise, avoid flow field turbulence, and thus improve operating stability and water pumping effect in view of the current status of the prior art.

[0006] The second technical problem to be solved by the utility model is to provide a water pump using the above impeller in view of the current status of the prior art.

[0007] The third technical problem to be solved by the utility model is to provide a cleaning machine using the above-mentioned water pump in view of the current status of the prior art.

[0008] The technical solution adopted by the utility model to solve at least one of the above technical problems is:

[0009] An impeller for a water pump of a cleaning machine comprises an upper cover plate, a lower cover plate and blades, a water suction port is formed at the central portion of the lower cover plate, the blades are multiple and extend radially along the impeller between the upper cover plate and the lower cover plate, a water outlet is formed at the outer end of the blade, a notch extending inward from the outer edge of the blade is provided at the outer end of the blade, and the notch constitutes a drainage structure for the collected fluid to pass through.

[0010] The utility model provides a notch on the outer edge of the blade at the water outlet of the impeller. When the fluid gathers at the baffle of the water pump as the impeller draws water, part of the water flow can flow through the notch at the end of the blade, which reduces the collision between the circulating fluid and the gathered fluid, is beneficial to eliminate flow noise and reduce the vibration of the water pump; at the same time, the notch can also qualitatively guide the fluid flowing through, so that the fluid at the baffle is evenly distributed, avoids flow field turbulence, stabilizes the flow field, and thus improves the running stability of the water pump and the water pumping effect.

[0011] Preferably, at least two notches are arranged at the outer end of any blade, and the notches are arranged at intervals from top to bottom. The notches arranged above can guide the fluid at each location of the corresponding tongue, thereby improving the stability of the flow field.

[0012] Preferably, the notch is rectangular, the length of the rectangular notch in the radial direction of the blade is 1.5-3 mm, and the width of the rectangular notch in the vertical direction is 0.5-1.4 mm. With the above structure, the notch has an ideal fluid drainage function without affecting the water-drawing effect.

[0013] Preferably, there are three notches, which are evenly distributed from top to bottom at the outer edge of the blade. The notches arranged as above can guide the fluid at each location of the corresponding tongue, further improving the flow field stability.

[0014] Preferably, a rotating shaft is provided at the central part of the impeller, the lower end of which passes through the water suction port and is located under the lower cover plate, and a water guide sheet extending in an axial spiral is provided on the outer periphery of the rotating shaft portion located under the lower cover plate. This structure can directional guide the fluid at the impeller inlet to improve the flow field stability, thereby improving the running stability and pumping efficiency of the water pump.

[0015] Preferably, the water guide blades are in two groups, and the two water guide blades are symmetrically arranged on the outer periphery of the rotating shaft. Alternatively, the water guide blades are in multiple groups, and the multiple groups of water guide blades are evenly distributed on the outer periphery of the rotating shaft. The above structure can be set according to the actual needs of the water pump to further improve the drainage effect of the fluid at the impeller inlet.

[0016] Preferably, the bottom edge of the water guide is flush with the lower end surface of the shaft. The outer peripheral wall of the shaft portion below the lower cover plate forms a guide surface with a gradually increasing diameter from top to bottom. The above structure is conducive to further improving the drainage effect of the fluid at the impeller inlet.

[0017] Preferably, the water guide is arranged on the guide surface, and the width of the water guide gradually increases from top to bottom in the radial direction, so that the outer edges of the water guide are located on the same circumferential surface. The above structure is conducive to further improving the drainage effect of the fluid at the impeller inlet.

[0018] A water pump for a cleaning machine comprises a pump casing with a water inlet at the bottom thereof, and the impeller mentioned above, wherein the impeller is rotatably arranged in the pump casing, and the water suction port of the impeller is arranged corresponding to the water inlet of the pump casing.

[0019] A water pump for a washing machine comprises a pump casing, a water inlet is formed at the bottom of the pump casing, and the impeller is rotatably arranged in the pump casing, the water suction port of the impeller is arranged corresponding to the water inlet of the pump casing, the rotating shaft portion located under the lower cover plate and the water guide sheet arranged on the outer periphery thereof pass through the water inlet of the pump casing and are located under the pump casing, and the water guide sheet constitutes a rectifying structure that can comb the water flow at the water pump inlet. With the above structure, the fluid at the water pump inlet can be orderly guided in the washing chamber to further improve the flow stability of the fluid entering the water pump.

[0020] A cleaning machine comprises a box body and a spray arm, wherein a concave water return area is arranged at the bottom of the box body, and also comprises the above-mentioned water pump, wherein the water pump is arranged in the water return area, the water inlet of the water pump is arranged downward, and a water outlet end connected to the spray arm is arranged on the side or upper part of the water pump.

[0021] Compared with the prior art, the utility model has the following advantages: a notch is provided on the outer edge of the blade at the water outlet of the impeller. When the fluid gathers at the baffle of the water pump as the impeller draws water, part of the water flow can flow through the notch at the end of the blade, which reduces the collision between the circulating fluid and the gathered fluid, helps to eliminate flow noise and reduce vibration of the water pump; at the same time, the notch can also qualitatively guide the fluid flowing through, so that the fluid at the baffle is evenly distributed, avoiding flow field turbulence and stabilizing the flow field, thereby improving the operation stability of the water pump and the water pumping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the impeller in the embodiment of the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the bottom structure;

[0024] Figure 3 for Figure 1 A cross-sectional view of

[0025] Figure 4 This is a cross-sectional view of a water pump according to an embodiment of the utility model;

[0026] Figure 5 It is a partial structural schematic diagram of a cleaning machine according to an embodiment of the utility model. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] like Figures 1 to 5 As shown, the impeller 1 for the water pump of a cleaning machine in this embodiment includes an upper cover plate 11, a lower cover plate 12 and blades 13. A water suction port 121 is formed in the central portion of the lower cover plate 12. There are multiple blades 13 (8 are provided in this embodiment) and they extend radially along the impeller 1 between the upper cover plate 11 and the lower cover plate 12. A water outlet 14 is formed at the outer end of the blade 13, that is, the outer end of the flow channel 15 enclosed by the upper cover plate 11, the lower cover plate 12 and the blades 13 forms the water outlet 14.

[0029] In this embodiment, a notch 131 extending inward from the outer edge of the blade 13 is provided at the outer end of the blade 13, and the notch 131 constitutes a drainage structure for the collected fluid to pass through. At least two notches 131 are provided at the outer end of the blade 13, and the notches 131 are arranged at intervals from top to bottom. The notches 131 arranged as above can drain the fluid at various locations corresponding to the water pump baffle tongue, thereby improving the stability of the flow field.

[0030] The notch 131 of this embodiment is rectangular, and the length of the rectangular notch 131 in the radial direction of the blade 13 is 1.5 to 3 mm, preferably 2 mm, and the width of the rectangular notch 131 in the vertical direction is 0.5 to 1.4 mm, preferably 1 mm. With the above structure, the notch 131 has an ideal fluid drainage function without affecting the water-drawing effect. There are three notches 131 in this embodiment, and the three notches 131 are evenly distributed from top to bottom at the outer edge of the blade 13.

[0031] In this embodiment, a rotating shaft 16 is provided at the central part of the impeller 1, and the lower end of the rotating shaft 16 passes through the water suction port 121 and is located under the lower cover plate 12. A water guide sheet 17 extending in an axial spiral is provided on the outer periphery of the rotating shaft 16 portion located under the lower cover plate 12. This structure can directional guide the fluid at the inlet of the impeller 1 to improve the flow field stability, thereby improving the running stability and pumping efficiency of the water pump.

[0032] In this embodiment, there are two groups of water guides 17, which are symmetrically arranged on the outer periphery of the rotating shaft 16. Of course, the water guides 17 can also be set as multiple groups as needed, and the multiple groups of water guides are evenly distributed on the outer periphery of the rotating shaft. The above structure can be set according to the actual needs of the water pump to further improve the drainage effect of the fluid at the impeller inlet.

[0033] The bottom edge of the water guide sheet 17 is flush with the lower end surface of the rotating shaft 16. The outer peripheral wall of the rotating shaft 16 portion located below the lower cover plate 12 forms a guide surface 161 with a gradually increasing diameter from top to bottom. The above structure is conducive to further improving the drainage effect of the fluid at the inlet of the impeller 1.

[0034] The water guide piece 17 is arranged on the guide surface 161, and the width of the water guide piece 17 in the radial direction gradually increases from top to bottom, so that the outer edges of the water guide piece 17 are located on the same circumferential surface. The above structure is conducive to further improving the drainage effect of the fluid at the impeller inlet.

[0035] The water pump for a washing machine in this embodiment includes a pump housing 2, a water inlet 21 is opened at the bottom of the pump housing 2, and the impeller 1 mentioned above. The impeller 1 is rotatably arranged in the pump housing 2, and the water suction port 121 of the impeller 1 is arranged corresponding to the water inlet 21 of the pump housing 2. The rotating shaft 16 part located under the lower cover plate 12 and the water guide sheet 17 arranged on the outer periphery thereof pass through the water inlet 21 of the pump housing 2 and are located under the pump housing 2. The water guide sheet 17 constitutes a rectifying structure that can comb the water flow at the water pump inlet. With the above structure, the fluid at the water pump inlet can be orderly guided in the washing chamber to further improve the flow stability of the fluid entering the water pump.

[0036] The cleaning machine of this embodiment includes a box body 3 and a spray arm 4. A concave water return area 31 is provided at the bottom of the box body 3. The box body 3 also includes the above-mentioned water pump, which is arranged in the water return area 31. The water inlet 21 of the water pump is arranged downward, and a water outlet end connected to the spray arm 4 is provided on the side or upper part of the water pump.

[0037] In this embodiment, a notch 131 is provided on the outer edge of the blade 13 at the water outlet 14 of the impeller 1. When the fluid gathers at the water pump baffle 22 as the impeller 1 draws water, part of the water flow can flow through the notch 131 at the end of the blade 13, which reduces the collision between the circulating fluid and the gathered fluid, helps to eliminate flow noise and reduce pump vibration; at the same time, the notch 131 can also qualitatively guide the fluid flowing through, so that the fluid at the baffle 22 is evenly distributed, avoiding flow field turbulence and stabilizing the flow field, thereby improving the running stability of the water pump and the water pumping effect.

[0038] 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 impeller for a water pump of a cleaning machine, comprising an upper cover plate (11), a lower cover plate (12) and blades (13), wherein a water suction port (121) is formed at the central portion of the lower cover plate (12), the blades (13) are multiple and extend along the radial direction of the impeller between the upper cover plate (11) and the lower cover plate (12), and a water outlet (14) is formed at the outer end of the blade (13), characterized in that: A notch (131) extending inward from the outer edge of the blade (13) is provided at the outer end of the blade (13), and the notch (131) constitutes a drainage structure for the collected fluid to pass through.

2. The impeller for a cleaning machine water pump according to claim 1, characterized in that: At least two notches (131) are arranged at the outer end of any blade (13), and the notches (131) are arranged at intervals from top to bottom.

3. The impeller for a cleaning machine water pump according to claim 2, characterized in that: The notch (131) is rectangular, the length of the rectangular notch (131) in the radial direction of the blade (13) is 1.5 to 3 mm, and the width of the rectangular notch (131) in the up-down direction is 0.5 to 1.4 mm.

4. The impeller for a cleaning machine water pump according to claim 2, characterized in that: There are three notches (131), and the three notches (131) are evenly distributed from top to bottom at the outer edge of the blade (13).

5. The impeller for a cleaning machine water pump according to any one of claims 1 to 4, characterized in that: A rotating shaft (16) is arranged at the central part of the impeller, and the lower end of the rotating shaft (16) passes through the water suction port (121) and is located below the lower cover plate (12). A water guide plate (17) extending in an axial spiral is arranged on the outer periphery of the rotating shaft (16) portion located below the lower cover plate (12).

6. The impeller for a cleaning machine water pump according to claim 5, characterized in that: The water guide plates (17) are in two groups, and the two water guide plates (17) are symmetrically arranged on the outer periphery of the rotating shaft (16).

7. The impeller for a cleaning machine water pump according to claim 5, characterized in that: The water guide plates (17) are in multiple groups, and the multiple groups of water guide plates (17) are evenly distributed around the outer periphery of the rotating shaft (16).

8. The impeller for a cleaning machine water pump according to claim 5, characterized in that: The bottom edge of the water guide plate (17) is flush with the lower end surface of the rotating shaft (16).

9. The impeller for a cleaning machine water pump according to claim 5, characterized in that: The outer peripheral wall of the rotating shaft (16) portion located below the lower cover plate (12) forms a flow guide surface (161) whose diameter gradually increases from top to bottom.

10. The impeller for a cleaning machine water pump according to claim 9, characterized in that: The water guide piece (17) is arranged on the guide surface (161), and the width of the water guide piece (17) in the radial direction gradually increases from top to bottom, so that the outer edges of the water guide piece (17) are located on the same circumferential surface.

11. A water pump for a cleaning machine, comprising a pump housing (2), wherein a water inlet (21) is provided at the bottom of the pump housing (2), wherein: It also comprises the impeller according to any one of claims 1 to 4, wherein the impeller is rotatably arranged in the pump casing (2), and the water suction port (121) of the impeller is arranged corresponding to the water inlet (21) of the pump casing (2).

12. A water pump for a cleaning machine, comprising a pump housing (2), wherein a water inlet (21) is formed at the bottom of the pump housing (2), and characterized in that: It also includes the impeller described in any one of claims 5 to 10, wherein the impeller is rotatably arranged in the pump casing (2), the water suction port (121) of the impeller is arranged corresponding to the water inlet (21) of the pump casing (2), the rotating shaft (16) portion located under the lower cover plate (12) and the water guide plate (17) arranged on the outer periphery thereof pass through the water inlet (21) of the pump casing (2) and are located under the pump casing (2), and the water guide plate (17) constitutes a rectifying structure that can sort out the water flow at the water pump inlet.

13. A cleaning machine, comprising a box (3) and a spray arm (4), wherein a concave water return area is provided at the bottom of the box (3), characterized in that: It also includes the water pump according to claim 11 or 12, wherein the water pump is arranged in the return water area, the water inlet (21) of the water pump is arranged downward, and the side or upper part of the water pump is provided with a water outlet end connected to the spray arm (4).

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