Water pump for cleaning machine and cleaning machine

Abstract

The water pump comprises a pump shell and an impeller arranged in the pump shell, the pump shell is provided with a water inlet and a water outlet, and the water pump is characterized in that the water inlet is formed in the bottom of the pump shell, the top of the pump shell is provided with an installation opening used for placing the impeller in the pump shell, and the installation opening is detachably connected with a sealing cover. The pump shell can be made into a whole, the mounting opening is formed in the top of the pump shell, the impeller is placed in the pump shell through the mounting opening, then the mounting opening is sealed through the sealing cover, the water pump can be conveniently assembled, and due to the fact that pressure in the water pump is mainly transmitted in the radial direction, the sealing cover located on the top of the pump shell is convenient to achieve, and water drainage is avoided. The sealing effect after assembly is good, and water pumping efficiency and water pressure can be improved.

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 open water pump and cleaning machine" (application number: CN202211216848.9) with publication number CN115573915A discloses the assembly structure of an open water pump and a box. The drive motor of the open water pump is generally arranged at the bottom of the dishwasher, and the output shaft of the drive motor passes through the bottom wall of the dishwasher upward and extends into the water pump to connect with the water-drawing impeller. When the water pump is installed in the return water area, it is necessary to install the water-drawing impeller in the pump casing and simultaneously realize the connection between the water-drawing impeller and the output shaft of the drive motor. In order to facilitate such a connection, the pump casing is usually arranged as an upper casing and a lower casing spliced ​​up and down. This connection method is not only inconvenient, but also because the pressure in the water pump during the washing process is very high, it is easy to cause water leakage between the upper and lower casings, affecting the pumping efficiency and water pressure. 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 a good sealing effect after assembly, thereby facilitating the improvement of water pumping efficiency and water pressure, 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 comprises a pump casing and an impeller arranged in the pump casing, wherein the pump casing is provided with a water inlet and a water outlet, wherein the water inlet is provided at the bottom of the pump casing, and the top of the pump casing is provided with an installation opening for placing the impeller in the pump casing, wherein a sealing cover is detachably connected to the installation opening.

[0008] Preferably, the top of the pump housing is provided with a fitting sleeve extending upwardly along the mounting opening, and the sealing cover is provided with a plug-in portion that can be plugged with the fitting sleeve. The plug-in method is conducive to improving the sealing performance between the sealing cover and the pump housing.

[0009] Preferably, the edge of the cover is provided with a peripheral edge located at the periphery of the plug-in portion and spaced apart from the plug-in portion, and the peripheral edge is detachably connected to the assembly sleeve. Preferably, in the assembled state, the peripheral edge is sleeved on the periphery of the assembly sleeve and is locked with the assembly sleeve. The above structure facilitates the detachable restraint of the cover and the pump housing together.

[0010] Preferably, a first convex card is provided on the outer peripheral surface of the assembly sleeve, and correspondingly, a second convex card is provided on the inner peripheral wall of the surrounding edge, and the second convex card and the first convex card are locked and limited as the two rotate relative to each other. Further preferably, the first convex card is an L-shaped structure, the lateral part of the L-shaped structure extends laterally close to the upper edge of the assembly sleeve, and the vertical part of the L-shaped structure extends downward from the upper edge of the assembly sleeve. The second convex card is a convex block, and the lower side of the lateral part of the L-shaped structure is provided with a protrusion that can limit the position of the convex block after it is inserted into the L-shaped structure. With the above structure, after the cover is placed on the installation port, the cover is rotated until the convex block is inserted into the L-shaped structure, so that the cover and the pump housing can be locked, which is convenient to operate. Of course, the cooperation between the first convex card and the second convex card is only a locking implementation method of the cover and the pump housing, and the two can also be locked by a threaded structure.

[0011] Preferably, a guiding slope extending gradually outward from bottom to top is formed at the top edge of the inner wall of the assembly sleeve. This structure facilitates the insertion of the plug-in part into the assembly sleeve and facilitates operation.

[0012] Preferably, the outer peripheral surface of the plug-in part is provided with a slot extending in the circumferential direction, in which a sealing ring is embedded, and in the assembled state, the sealing ring is elastically squeezed against the inner wall surface of the assembly set. This structure is conducive to improving the sealing after assembly and avoiding water leakage.

[0013] Preferably, the water pump has a disc-shaped body, the water inlet is opened in the central part of the bottom wall of the body, the side of the body is provided with a flow channel extending in a circumferential spiral, and the end of the flow channel is formed with a water outlet offset relative to the center of the body.

[0014] A cleaning machine comprises a box body, a concave water return area is arranged at the bottom of the box body, and the water pump is arranged in the water return area. A driving member is arranged at the outer bottom of the box body, and the output shaft of the driving member passes through the bottom wall of the box body and the water inlet and is connected to the impeller in the pump housing. When installing the water pump in the box body, when the driving member has been installed at the bottom of the box body, the pump housing is first locked in the water return area of ​​the box body by means of screws, etc., and then the impeller is placed into the pump housing from the installation port, and the impeller is locked and connected with the output shaft of the driving member extending into the pump housing, and then the cover is buckled at the installation port and locked with the pump housing.

[0015] Preferably, a slag collection basket and a heating element are also provided in the water return area. From a top view, the water pump, slag collection basket and heating element are arranged in a herringbone structure, and the side walls of the water return area are surrounded by the periphery of the herringbone structure to form a triangular structure, wherein the water pump is provided with an offset water outlet and the outlet extends to the central part of the herringbone structure. The water return area is arranged in the center of 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 of the water pump is arranged corresponding to the central part of the bottom of the washing chamber. The return water area of ​​the existing washing machine is semicircular in shape as a whole. Considering that the spray arm needs to be arranged in the center relative to the box body in order to better cover the tableware cleaning range, the return water area needs to be offset on the bottom wall of the box body, and the debris collecting basket located next to the spray arm is also offset on the bottom wall of the box body. During the return water process, the ideal effect is that the return water enters the return water area after filtering the residue through the debris collecting basket, and then is further drawn into the spray arm through the water suction port of the open water pump in the return water area. However, since the debris collecting basket is offset too far from the bottom wall of the box body, the return water enters the return water area before flowing to the debris collecting basket, resulting in poor debris collection effect and residue retention problems on the filter plate. At the same time, the structure of the return water area of ​​the existing cleaning machine determines that the heating element located beside the water pump is also offset on the bottom wall of the box. In order to improve the heating efficiency, it is necessary to make the heating element have a corresponding return water area. This requires the return water area to have a volume that meets the installation requirements of the heating element and the slag collection basket, which makes it difficult to reduce the total volume of the return water chamber, resulting in a certain amount of water waste, affecting the water efficiency of the cleaning machine. The utility model sets the return water area as a triangular structure, and uses each corner area of ​​the triangular structure to install the water pump, the slag collection basket, and the heating element, and then guides the outlet water to the remaining space in the central part of the triangular structure through the offset outlet of the water pump, so as to maximize the use of the space of the return water area, which not only greatly reduces the volume of the return water area, which is beneficial to saving the amount of washing water each time, but also helps to improve the return water speed and water efficiency; because the water pump no longer occupies the central part of the bottom of the cleaning machine, the slag collection basket can be closer to the central part of the bottom of the cleaning machine, which is beneficial to improve the slag collection effect.

[0016] The water return area is arranged in the center of the bottom of the inner tank (i.e. the bottom of the washing chamber), the water pump is offset relative to 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 "water return area is arranged in the center of the bottom of the inner tank" mentioned above means that the center of the water return 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 can be: a circular area with a diameter of 5 to 10 mm and the center of the water return area falls within the circular area with the center of the bottom wall of the inner tank as the center of the circle; "the water pump is offset relative to 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.

[0017] Compared with the prior art, the advantages of the utility model are: the pump casing of the utility model can be made into an integral body, a mounting opening is opened on the top of the pump casing, the impeller is placed in the pump casing through the mounting opening, and the mounting opening is sealed by a cover, which is convenient for assembling the water pump, and because the pressure in the water pump is mainly transmitted radially, the cover located on the top of the pump casing is convenient for sealing and avoiding water leakage, and the sealing effect after assembly is beneficial to improving the water pumping efficiency and water pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the water pump according to an embodiment of the utility model;

[0019] Figure 2 for Figure 1 Exploded diagram of

[0020] Figure 3 for Figure 1 A cross-sectional view of

[0021] Figure 4 It is a schematic diagram of the structure of a cleaning machine according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] The water pump used for the cleaning machine in this embodiment is an open water pump, that is, the water pump is installed in the return water area of ​​the cleaning machine, and no external pipeline is required to guide water. The water in the return water area directly flows back through the water pump and the spray arm.

[0024] like Figures 1 to 4 As shown, the water pump 3 of this embodiment includes a pump casing 36 and an impeller 37 arranged in the pump casing 36. The pump casing 36 is provided with a water inlet 33 and a water outlet 31. The water inlet 31 is provided at the bottom of the pump casing 36. The top of the pump casing 36 is provided with an installation opening 361 for placing the impeller 37 in the pump casing 36. A cover 38 is detachably connected to the installation opening 361.

[0025] The top of the pump housing 36 is provided with an assembly sleeve 362 extending upward along the mounting opening 361, and the cover 38 is provided with a plug-in portion 381 that can be plugged with the assembly sleeve 362. The plug-in method is conducive to improving the sealing between the cover 38 and the pump housing 36. The edge of the cover 38 is provided with a surrounding edge 382 located at the periphery of the plug-in portion 381 and arranged at intervals from the plug-in portion 381, and the surrounding edge 382 is detachably connected to the assembly sleeve 362. In the assembled state, the surrounding edge 382 is sleeved on the periphery of the assembly sleeve 362 and is locked and connected to the assembly sleeve 362. The above structure facilitates the detachable restraint of the cover 38 and the pump housing 36.

[0026] In this embodiment, a first convex card 10 is provided on the outer peripheral surface of the assembly sleeve 362, and correspondingly, a second convex card 20 is provided on the inner peripheral wall of the surrounding edge 382, ​​and the second convex card 20 and the first convex card 10 are locked and limited as the two rotate relative to each other. The first convex card 10 is an L-shaped structure, and the transverse part 101 of the L-shaped structure extends laterally close to the upper edge of the assembly sleeve 362, and the vertical part 102 of the L-shaped structure extends downward from the upper edge of the assembly sleeve 362. The second convex card 20 is a convex block, and the lower side of the transverse part 101 of the L-shaped structure is provided with a protrusion 103 that can limit the position of the convex block after it is inserted into the L-shaped structure. With the above structure, after the cover 38 is placed on the installation port 361, the cover 38 is rotated until the convex block is inserted into the L-shaped structure, so that the cover 38 and the pump housing 36 can be locked, and the operation is convenient. Of course, the cooperation between the first protruding catch 10 and the second protruding catch 20 is only one locking implementation method of the sealing cover 38 and the pump housing 36, and the two can also be locked by a threaded structure.

[0027] A guiding inclined surface 363 extending gradually outward from bottom to top is formed at the top edge of the inner wall of the assembly sleeve 362. This structure facilitates the insertion of the plug-in portion 381 into the assembly sleeve 362, which is convenient for operation.

[0028] The outer peripheral surface of the plug-in portion 381 is provided with a slot 382 extending in the circumferential direction, and a sealing ring (not shown in the figure) is embedded in the slot 383. When the assembly is completed, the sealing ring is elastically squeezed with the inner wall surface of the assembly sleeve 362. This structure is conducive to improving the sealing after assembly and avoiding water leakage.

[0029] The water pump 3 of the present embodiment is a centrifugal water pump having a disc-shaped body, a water inlet 33 being opened at the central portion of the bottom wall of the body, a flow channel 34 extending in a circumferential spiral is provided on the side of the body, the end of the flow channel 34 is connected to a water pipe 32 extending vertically upward, and the upper end of the water pipe 32 is formed with a water outlet 31 offset relative to the center of the body.

[0030] The cleaning machine of this embodiment includes a housing 1 and the water pump 3. The housing is provided with a concave water return area 21. The top of the water return area 21 is covered with a filter plate. The water pump 3 is provided in the water return area 21 and is used to pump the water in the water return area 21 to the spray arm above the filter plate. A slag collection basket 4 and a heating element 5 are also provided in the water return area 21. 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 water return area 21 are surrounded by 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 34. The water return area 21 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. The water outlet 31 of the water pump 3 is arranged corresponding to the central part of the bottom of the washing chamber.

[0031] A driving member is provided at the outer bottom of the housing 1, and the output shaft of the driving member passes through the bottom wall of the housing 1 and the water inlet 33 and is connected to the impeller 37 in the pump housing 36. When the water pump 3 is installed in the housing 1, the pump housing 36 is first locked in the return water area 21 of the housing 1 by means of screws or the like, and then the impeller 37 is placed into the pump housing 36 from the installation opening 361, and the impeller 37 is locked and connected with the output shaft of the driving member extending into the pump housing 36, and then the cover 38 is buckled at the installation opening 361 and locked with the pump housing 36.

[0032] The pump housing 36 of this embodiment can be made into an integral body, for example, the upper and lower housings can be welded into an integral body, or can be integrally formed by injection molding. An installation opening 361 is provided at the top of the pump housing 36, and the impeller 37 is placed into the pump housing 36 through the installation opening 361, and then the installation opening 361 is sealed by the cover 38, so as to facilitate the assembly of the water pump 3. Since the pressure in the water pump 3 is mainly transmitted radially, the cover 38 located at the top of the pump housing 36 facilitates sealing and avoids water leakage. The sealing effect after assembly is conducive to improving the water pumping efficiency and water pressure.

[0033] 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 (36) and an impeller (37) arranged in the pump housing (36), wherein the pump housing (36) is provided with a water inlet (33) and a water outlet (31), characterized in that: The water inlet (33) is provided at the bottom of the pump casing (36), and a mounting opening (361) for placing the impeller (37) in the pump casing (36) is provided at the top of the pump casing (36), and a sealing cover (38) is detachably connected to the mounting opening (361).

2. The water pump for a cleaning machine according to claim 1, characterized in that: The top of the pump housing (36) is provided with a mounting sleeve (362) extending upward along the mounting opening (361), and the sealing cover (38) is provided with a plug-in portion (381) that can be plugged with the mounting sleeve (362).

3. The water pump for a cleaning machine according to claim 2, characterized in that: The edge of the sealing cover (38) is provided with a surrounding edge (382) located at the periphery of the plug-in portion (381) and spaced apart from the plug-in portion (381), and the surrounding edge (382) is detachably connected to the assembly sleeve (362).

4. The water pump for a cleaning machine according to claim 3, characterized in that: When the assembly is completed, the surrounding edge (382) is sleeved on the periphery of the assembly sleeve (362) and is locked and connected to the assembly sleeve (362).

5. The water pump for a cleaning machine according to claim 4, characterized in that: A first convex clamp (10) is arranged on the outer peripheral surface of the assembly sleeve (362), and correspondingly, a second convex clamp (20) is arranged on the inner peripheral wall of the surrounding edge (382), and the second convex clamp (20) and the first convex clamp (10) are locked and limited as the two rotate relative to each other.

6. The water pump for a cleaning machine according to claim 5, characterized in that: The first convex card (10) is an L-shaped structure, the transverse portion (101) of the L-shaped structure extends laterally close to the upper edge of the mounting sleeve (362), and the vertical portion (102) of the L-shaped structure extends downward from the upper edge of the mounting sleeve (362). The second convex card (20) is a convex block, and a protrusion (103) is provided on the lower side of the transverse portion (101) of the L-shaped structure to limit the convex block after it is inserted into the L-shaped structure.

7. The water pump for a cleaning machine according to any one of claims 2 to 6, characterized in that: A guiding inclined surface (363) is formed at the top edge of the inner wall of the assembly sleeve (362) and gradually extends outward from bottom to top.

8. The water pump for a cleaning machine according to any one of claims 2 to 6, characterized in that: The outer peripheral surface of the plug-in portion (381) is provided with a slot (383) extending in the circumferential direction, and a sealing ring is embedded in the slot (383). In the assembled state, the sealing ring is elastically pressed against the inner wall surface of the assembly sleeve (362).

9. The water pump for a cleaning machine according to any one of claims 1 to 6, characterized in that: The water pump has a disc-shaped body, the water inlet (33) is opened at the central part of the bottom wall of the body, the side of the body is provided with a flow channel (34) extending in a circumferential spiral, and the end of the flow channel (34) is formed with a water outlet (31) offset relative to the center of the body.

10. A cleaning machine, comprising a housing (1), wherein a concave water return area (21) 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 9, which is arranged in the return water area (21), and a driving member is provided at the outer bottom of the casing (1), and the output shaft of the driving member passes through the bottom wall of the casing (1) and the water inlet (33) and is connected to the impeller (37) in the pump casing (36).

11. The cleaning machine according to claim 10, characterized in that: A slag collecting basket (4) and a heating element (5) are also provided in the water return area (21). When viewed from a top view, the water pump (3), the slag collecting basket (4) and the heating element (5) are arranged in a herringbone structure. The side walls of the water return area (21) are enclosed at the periphery of the herringbone structure to form a triangular structure. The water pump (3) is provided with an offset water outlet (31) and the water outlet extends to the central portion of the herringbone structure.

12. The cleaning machine according to claim 11, characterized in that: The water return area (21) is arranged centrally at 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.

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