Water pump for cleaning machine and cleaning machine

Abstract

The water pump comprises a pump shell, the pump shell comprises a first pump shell body and a second pump shell body which can be mutually spliced so as to define a pump cavity, an inserting groove is formed in the edge, facing the second pump shell body, of the first pump shell body, a sealing ring is embedded in the inserting groove, and the first pump shell body and the second pump shell body are mutually spliced so that a pump cavity can be defined by the first pump shell body and the second pump shell body. And an inserting part which can be inserted into the inserting groove and is matched with the sealing ring for sealing is formed at the edge, facing the first pump shell, of the second pump shell. The first pump shell and the second pump shell which can be spliced with each other are adopted, so that the impeller can be conveniently mounted in the pump shell; a slot is formed in the edge of the first pump shell, a sealing ring is arranged in the slot, and an insertion part on the edge of the second pump shell is matched with the sealing ring in the insertion matching process of the insertion part and the slot, so that on one hand, a labyrinth-shaped sealing path is formed, and on the other hand, an assembly gap is further blocked through elastic extrusion, and on the basis of facilitating assembly, the sealing performance is improved; and water leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to a water pump for a washing machine 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] Using an open water pump to draw water for the spray arm can greatly shorten the return water path, improve the return water efficiency, and facilitate the maintenance of the water pump. "An assembly structure of an open water pump and a cleaning machine" (application number: CN202211219551.8) with publication number CN115444343A discloses an assembly structure of an open water pump and a water cup, and the open water pump is fixed to the bottom of the water cup by screws. For an open water pump, it is directly located in the return water area, which can provide a large water-drawing power and water pressure. The water pressure in the water pump is very high, which puts high demands on the sealing of the pump casing. In order to meet this sealing requirement, the existing water pump usually installs the impeller into the pump casing, and then fixes the upper and lower pump casings by welding or the like. However, since the open water pump is fixed in the concave return water area at the bottom of the cleaning machine, it is difficult to install the water pump. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a water pump for a cleaning machine which is easy to assemble and has good sealing performance after assembly, in view of the current status of the prior art.

[0005] The second technical problem to be solved by the utility model is to provide a cleaning machine using the water pump according to the current status of the prior art.

[0006] The technical solution adopted by the utility model to solve at least one of the above technical problems is:

[0007] A water pump for a cleaning machine includes a pump casing, wherein the pump casing includes a first pump casing and a second pump casing that can be spliced ​​together to enclose a pump chamber, the first pump casing is formed with a slot at the edge facing the second pump casing, a sealing ring is embedded in the slot, and the second pump casing is formed with a plug-in portion that can be inserted into the slot and cooperate with the sealing ring for sealing at the edge facing the first pump casing.

[0008] Preferably, the cross section of the sealing ring is a U-shaped structure, and the plug-in portion is inserted into the U-shaped structure in the assembled state. The plug-in portion cooperates with the U-shaped structure to form a labyrinth-shaped sealing path, which is conducive to improving the sealing performance. At the same time, the elastic extrusion between the sealing ring and the plug-in portion is conducive to further improving the sealing performance.

[0009] Preferably, a convex rib that can be elastically pressed against the plug-in portion is convexly provided on the inner side wall of the U-shaped structure, and the convex rib can further improve the sealing performance.

[0010] Preferably, the inner side wall corresponding to the first vertical part of the U-shaped structure is provided with a first convex rib that can be elastically pressed against the inner side wall of the plug-in part, and the inner side wall corresponding to the second vertical part of the U-shaped structure is provided with a second convex rib that can be elastically pressurized against the outer side wall of the plug-in part. Providing convex ribs on the inner and outer sides of the plug-in part is conducive to double water isolation and improved sealing.

[0011] Preferably, the first convex ribs and the second convex ribs are arranged alternately up and down. This structure facilitates the demoulding of the mold during the injection molding of the sealing ring, and forms seals at different heights respectively, further improving the sealing performance.

[0012] Preferably, the height of the first convex rib is lower than that of the second convex rib. This structure facilitates the demoulding of the mold during the injection molding of the sealing ring, and forms seals at different heights, which is conducive to improving the sealing performance; at the same time, since the pressure at the assembly gap is high inside and low outside, the structure with the first convex rib being low and the second convex rib being high adapts to the pressure state, which is conducive to further improving the sealing performance.

[0013] Preferably, the first convex rib, the second convex rib and the inner wall of the U-shaped structure below them together enclose a sealed cavity that surrounds the lower part of the plug-in part. The structure encloses a sealed cavity at the lower part of the plug-in part, and after water seeps into the sealed cavity, it fills the sealed cavity to form a seal, further preventing water from overflowing and improving the sealing performance.

[0014] Preferably, the first vertical portion of the U-shaped structure is arranged close to the inner wall of the pump housing, and the second vertical portion is arranged close to the outer wall of the pump housing. The inner wall corresponding to the first vertical portion gradually tilts downward from the upper edge toward the inner wall of the plug-in portion to form a first inclined surface, and the inner wall corresponding to the second vertical portion gradually tilts downward from the upper edge toward the outer wall of the plug-in portion to form a second inclined surface. The first inclined surface and the second inclined surface facilitate the insertion of the plug-in portion into the U-shaped structure of the sealing ring to avoid deformation of the end of the U-shaped structure and affect the plug-in accuracy.

[0015] Further preferably, the slope of the first inclined surface is smaller than the slope of the second inclined surface, so as to improve the mating accuracy.

[0016] Further preferably, the height of the first inclined surface is greater than the height of the second inclined surface to improve the mating accuracy.

[0017] Preferably, the U-shaped structure of the sealing ring is matched with the slot structure, the first vertical part of the U-shaped structure is arranged close to the first inner side wall of the slot, the second vertical part of the U-shaped structure is arranged close to the second inner side wall of the slot, and the lower end surface of the U-shaped structure is arranged close to the inner bottom wall of the slot, so as to improve the compactness of the assembly and thus improve the sealing performance.

[0018] Preferably, the first pump housing and / or the second pump housing is provided with a locking structure for restraining it in the cleaning machine. The locking structure is at least one of a screw connection structure and a snap connection structure.

[0019] Preferably, a snap-fit ​​structure capable of detachably restraining the first pump housing and the second pump housing is further provided at the edges of the first pump housing and the second pump housing.

[0020] A cleaning machine comprises a box body, a concave water return area is arranged at the bottom of the box body, and also comprises the above-mentioned water pump, which is arranged in the water return area, has a water inlet connected to the water return area at the bottom of the water pump, and a water outlet is arranged at the top.

[0021] Preferably, a slag collecting basket and a heating element are also provided in the return water area. When viewed from a top view, the water pump, slag collecting basket and heating element are arranged in a herringbone structure, and the side walls of the return water area are enclosed in the periphery of the herringbone structure to form a triangular structure, wherein the water pump is provided with an offset water outlet and the water outlet extends to the central part of the herringbone structure.

[0022] Preferably, the return water area is arranged centrally at the bottom of the washing chamber of the cleaning machine, the water pump is offset from the center of the bottom wall of the washing chamber, and the water outlet of the water pump is arranged corresponding to the central part of the bottom of the washing chamber. The return water area is arranged centrally at the bottom of the inner tank (i.e., the bottom of the washing chamber), the water pump is offset from the center of the bottom wall of the inner tank, and the water outlet of the water pump is arranged corresponding to the central part of the bottom of the inner tank. The "return water area is arranged centrally at the bottom of the inner tank" mentioned above means that the center of the return water area roughly overlaps with the center of the bottom wall of the inner tank. Of course, they may not be completely aligned. For example, it may be: a circular area is formed with the center of the bottom wall of the inner tank as the center and a diameter of 5 to 10 mm, and the center of the return water area falls within the circular area; "the water pump is offset from the center of the bottom wall of the inner tank" means that the center of the water pump falls outside the above-mentioned circular area.

[0023] Compared with the prior art, the advantages of the utility model are: the utility model adopts a first pump casing and a second pump casing structure that can be spliced ​​with each other, so that the impeller is conveniently installed in the pump casing; a slot is arranged on the edge of the first pump casing, and a sealing ring is arranged in the slot, and the plug-in portion of the edge of the second pump casing cooperates with the sealing ring during the process of plugging with the slot, on the one hand, forming a maze-shaped sealing path, and on the other hand, further sealing the assembly gap through elastic extrusion, thereby improving the sealing performance and avoiding water leakage on the basis of facilitating assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the water pump according to an embodiment of the utility model;

[0025] Figure 2 for Figure 1 Schematic diagram of the bottom structure;

[0026] Figure 3 for Figure 1 Exploded diagram of

[0027] Figure 4 This is a plug-in diagram of the first pump housing and the second pump housing in the embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the structure of a cleaning machine in an embodiment of the utility model. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] The water pump used for the cleaning machine in this embodiment is an open water pump, that is, the pump casing is arranged in the return water area of ​​the cleaning machine, and the pump casing and the return water area are directly connected without the need for pipe water conduction, which is beneficial to reducing fluid energy loss and increasing water pressure.

[0031] like Figures 1 to 5 As shown, the water pump 3 of this embodiment includes a pump casing 31 and an impeller 32 arranged in the pump casing 31. The pump casing 31 includes a first pump casing 311 and a second pump casing 312 which can be spliced ​​together to enclose a pump chamber. The first pump casing 311 is formed with a slot 3111 at the edge facing the second pump casing 312, and a sealing ring 313 is embedded in the slot 3111. The second pump casing 312 is formed with a plug-in portion 3121 at the edge facing the first pump casing 311, which can be inserted into the slot 3111 and seal with the sealing ring 313.

[0032] The first pump housing 311 and the second pump housing 312 of this embodiment are assembled up and down. The cross section of the sealing ring 313 is a U-shaped structure. In the assembled state, the plug-in portion 3121 is inserted into the U-shaped structure. The plug-in portion 3121 cooperates with the U-shaped structure to form a labyrinth-shaped sealing path, which is conducive to improving the sealing performance. At the same time, the elastic extrusion between the sealing ring 313 and the plug-in portion 3121 is conducive to further improving the sealing performance.

[0033] The U-shaped structure of the sealing ring 313 is adapted to the structure of the slot 3111, the first vertical portion of the U-shaped structure is arranged close to the first inner wall of the slot 3111, the second vertical portion of the U-shaped structure is arranged close to the second inner wall of the slot 3111, and the lower end surface of the U-shaped structure is arranged close to the inner bottom wall of the slot 3111, so as to improve the compactness of the assembly and thus improve the sealing performance.

[0034] The inner side wall of the U-shaped structure is provided with a convex rib that can be elastically pressed against the plug-in portion 3121, and the convex rib can further improve the sealing performance. Specifically, the inner side wall corresponding to the first vertical portion of the U-shaped structure is provided with a first convex rib 3131 that can be elastically pressed against the inner side wall of the plug-in portion 3121, and the inner side wall corresponding to the second vertical portion of the U-shaped structure is provided with a second convex rib 3132 that can be elastically pressurized against the outer side wall of the plug-in portion 3121. The convex ribs are provided on the inner and outer sides of the plug-in portion 3121, which is conducive to double blocking of water and improving the sealing performance.

[0035] The first ribs 3131 and the second ribs 3132 are arranged alternately up and down, and the height of the first ribs 3131 is lower than that of the second ribs 3132. The above structure facilitates the mold demolding of the sealing ring 313 during injection molding, and forms seals at different heights, further improving the sealing performance; at the same time, since the pressure at the assembly gap is high inside and low outside, the structure with the first ribs 3131 being low and the second ribs 3132 being high is adapted to the pressure state, which is conducive to further improving the sealing performance.

[0036] The first convex rib 3131, the second convex rib 3132 and the inner wall of the U-shaped structure below together enclose a sealed cavity 3130 that surrounds the lower part of the plug-in portion 3121. The structure encloses a sealed cavity at the lower part of the plug-in portion 3121. After water seeps into the sealed cavity, it is filled in the sealed cavity to form a seal, further preventing water from overflowing and improving the sealing performance.

[0037] The first vertical part of the U-shaped structure is arranged close to the inner wall of the pump housing 31, and the second vertical part is arranged close to the outer wall of the pump housing 31. The inner wall corresponding to the first vertical part gradually tilts downward from the upper edge toward the inner wall of the plug-in portion 3121 to form a first inclined surface 313a, and the inner wall corresponding to the second vertical part gradually tilts downward from the upper edge toward the outer wall of the plug-in portion 3121 to form a second inclined surface 313b. The first inclined surface 313a and the second inclined surface 313b facilitate the insertion of the plug-in portion 3121 into the U-shaped structure of the sealing ring 313 to avoid deformation of the end of the U-shaped structure and affect the mating accuracy. The slope of the first inclined surface 313a is smaller than the slope of the second inclined surface 313b, and the height of the first inclined surface 313a is greater than the height of the second inclined surface 313b to improve the mating accuracy.

[0038] The edges of the first pump housing 311 and the second pump housing 312 are also provided with a buckle structure 001 that can detachably restrain the two together. The first pump housing 311 and the second pump housing 312 are provided with a locking structure for restraining them in the cleaning machine. The locking structure is at least one of a screw connection structure and a buckle connection structure.

[0039] The cleaning machine of this embodiment includes a box body 1, a concave water return area 11 is arranged at the bottom of the box body 1, and also includes the above-mentioned water pump 3, the water pump 3 is arranged in the water return area 11, a water inlet 33 connected to the water return area 11 is opened at the bottom of the water pump 3, and a water outlet 30 is arranged at the top.

[0040] In this embodiment, the outer bottom wall of the box body 1 is provided with a driving member for driving the impeller 32 to rotate. The driving member is a motor, and the output shaft of the motor is arranged toward and passes through the water inlet 33 to be connected to 32.

[0041] The return water area 11 is also provided with a slag collection basket 4 and a heating element 5. From a top view, the water pump 3, the slag collection basket 4 and the heating element 5 are arranged in a herringbone structure. The side walls of the return water area 11 are enclosed in the periphery of the herringbone structure to form a triangular structure, wherein the water outlet 31 of the water pump 3 extends to the central part of the herringbone structure through the water outlet channel 35. The return water area 11 is arranged in the center of the bottom of the washing chamber of the cleaning machine, the water pump 3 is offset relative to the center of the bottom wall of the washing chamber, and the water outlet 31 of the water pump 3 is arranged corresponding to the central part of the bottom of the washing chamber. The side of the water pump 3 is provided with a flow channel 35 that spirally extends toward the central part of the triangular structure, and the end of the flow channel 35 forms the above-mentioned water outlet 30. The spirally extended flow channel 35 pressurizes the return water on the one hand, and on the other hand extends the water outlet 30 to the center of the triangular structure in the process of throwing out the return water. Therefore, when the water pump 3 is offset relative to the bottom of the cleaning machine, the water outlet 30 is arranged centrally relative to the bottom of the cleaning machine, meeting the requirement of central arrangement of the bottom spray arm.

[0042] The present embodiment adopts a first pump casing 311 and a second pump casing 312 structure that can be spliced ​​with each other, so as to facilitate the installation of the impeller 32 in the pump casing 31; a slot 3111 is provided on the edge of the first pump casing 311, and a sealing ring 313 is provided in the slot 3111; the plug-in portion 3121 on the edge of the second pump casing 312 cooperates with the sealing ring 313 during the process of plugging with the slot 3111, so as to form a maze-shaped sealing path on the one hand, and to further seal the assembly gap through elastic extrusion on the other hand, so as to improve the sealing performance and avoid water leakage on the basis of facilitating assembly.

[0043] 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 water pump for a cleaning machine, comprising a pump housing (31), characterized in that: The pump housing (31) comprises a first pump housing (311) and a second pump housing (312) which can be connected to each other to enclose a pump chamber. The first pump housing (311) is provided with a slot (3111) at an edge facing the second pump housing (312), and a sealing ring (313) is embedded in the slot (3111). The second pump housing (312) is provided with a plug-in portion (3121) which can be inserted into the slot (3111) and cooperate with the sealing ring (313) for sealing at an edge facing the first pump housing (311). The cross section of the sealing ring (313) is a U-shaped structure. When assembled, the plug-in portion (3121) is inserted into the U-shaped structure.

2. The water pump for a cleaning machine according to claim 1, characterized in that: The inner side wall of the U-shaped structure is provided with a convex rib that can be elastically pressed against the plug-in portion (3121).

3. The water pump for a cleaning machine according to claim 2, characterized in that: The inner side wall corresponding to the first vertical part of the U-shaped structure is provided with a first convex rib (3131) that can be elastically squeezed with the inner side wall of the plug-in part (3121), and the inner side wall corresponding to the second vertical part of the U-shaped structure is provided with a second convex rib (3132) that can be elastically pressurized with the outer side wall of the plug-in part (3121).

4. The water pump for a cleaning machine according to claim 3, characterized in that: The first convex ribs (3131) and the second convex ribs (3132) are arranged alternately up and down.

5. The water pump for a cleaning machine according to claim 3, characterized in that: The height of the first convex rib (3131) is lower than the height of the second convex rib (3132).

6. The water pump for a cleaning machine according to claim 3, characterized in that: The first convex rib (3131), the second convex rib (3132) and the inner wall of the U-shaped structure therebelow together enclose a sealed cavity (3130) which surrounds the lower part of the plug-in portion (3121).

7. The water pump for a cleaning machine according to any one of claims 1 to 6, characterized in that: The first vertical portion of the U-shaped structure is arranged close to the inner wall of the pump housing (31), and the second vertical portion is arranged close to the outer wall of the pump housing (31); the inner wall corresponding to the first vertical portion gradually inclines downward from the upper edge toward the inner wall of the plug-in portion (3121) to form a first inclined surface (313a); the inner wall corresponding to the second vertical portion gradually inclines downward from the upper edge toward the outer wall of the plug-in portion (3121) to form a second inclined surface (313b).

8. The water pump for a cleaning machine according to claim 7, characterized in that: The slope of the first inclined surface (313a) is smaller than the slope of the second inclined surface (313b).

9. The water pump for a cleaning machine according to claim 7, characterized in that: The height of the first inclined surface (313a) is greater than the height of the second inclined surface (313b).

10. The water pump for a cleaning machine according to any one of claims 1 to 6, characterized in that: The U-shaped structure of the sealing ring (313) is adapted to the structure of the slot (3111), the first vertical portion of the U-shaped structure is arranged close to the first inner wall of the slot (3111), the second vertical portion of the U-shaped structure is arranged close to the second inner wall of the slot (3111), and the lower end surface of the U-shaped structure is arranged close to the inner bottom wall of the slot (3111).

11. The water pump for a cleaning machine according to any one of claims 1 to 6, characterized in that: The first pump housing (311) and / or the second pump housing (312) is provided with a locking structure for restraining the first pump housing (311) and / or the second pump housing (312) in the cleaning machine.

12. The water pump for a cleaning machine according to claim 11, characterized in that: The locking structure is at least one of a screw connection structure and a snap connection structure.

13. The water pump for a cleaning machine according to any one of claims 1 to 6, characterized in that: A buckle structure is also provided at the edges of the first pump housing and the second pump housing, which can detachably restrain the two together.

14. A cleaning machine, comprising a housing (1), wherein a concave water return area (11) is provided at the bottom of the housing (1), characterized in that: It also includes a water pump as described in any one of claims 1 to 13, wherein the water pump is arranged in the return water area (11), and a water inlet (33) connected to the return water area (11) is opened at the bottom of the water pump, and a water outlet (30) is arranged on the top and / or side.

15. The cleaning machine according to claim 14, characterized in that: The return water area (11) is also provided with a slag collecting basket (4) and a heating element (5). When viewed from a top view, the water pump, the slag collecting basket (4) and the heating element (5) are arranged in a herringbone structure, and the side walls of the return water area (11) are enclosed at the periphery of the herringbone structure to form a triangular structure, wherein the water pump (3) is provided with an offset water outlet (30) and the water outlet (30) extends to the central portion of the herringbone structure.

16. The cleaning machine according to claim 15, characterized in that: The water return area (11) is arranged centrally at the bottom of the washing chamber of the cleaning machine, the water pump is offset relative to the center of the bottom wall of the washing chamber, and the water outlet (30) of the water pump is arranged corresponding to the central part of the bottom of the washing chamber.

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