Water pump for cleaning machine and cleaning machine

Abstract

The utility model relates to a water pump for a cleaning machine and the cleaning machine, the bottom of the water pump is provided with a water inlet, the top of the water pump is provided with a first water outlet offset relative to the center of the water pump, and the top of the water pump is provided with a flow guide structure used for guiding water flow from the center to the edge. The water pump can be directly installed in a water return area to form an open type water flow system, the top of the water pump is provided with the flow guide structure used for guiding water flow from the center to the edge, accumulated water on the top of the water pump can be drained in time, bacterium breeding is avoided, the water flow participates in backflow in time, the water return flow can be increased, and the service life of the water pump is prolonged. And the cleaning effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to a water pump and a washing machine which can wash tableware, fruits and vegetables. 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. The "Assembly Structure of an Open Water Pump and a Cleaning Machine" (Application Number: CN202211219551.8) with the publication number CN115444343A discloses an assembly structure of an open water pump and a water cup. The top wall of the open water pump is exposed above the filter plate, resulting in a large assembly area between the water pump and the filter plate and a complex structure. It is easy to cause air inhalation problems at the assembly gap, which in turn affects the pumping efficiency and injection head of the water pump; if the water pump is set under the filter plate, it is difficult for the water to return between the top of the water pump and the filter plate, which makes it easy for bacteria to grow on the top of the water pump, causing secondary pollution. 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 can timely drain the water on the top of the water pump to avoid bacterial growth, 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 in which a water pump is arranged under a filter plate and no residual water is left on the top of the water pump, thereby avoiding bacterial growth, in view of 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, wherein a water inlet is provided at the bottom of the water pump, a first water outlet offset relative to the center of the water pump is provided at the top, and a flow guide structure for guiding water flow from the central part to the edge is arranged at the top of the water pump.

[0008] Preferably, the guide structure includes guide ribs extending from the center of the water pump to the edge. The guide ribs facilitate guiding the water on the top of the water pump from the center to the edge, thereby preventing water from accumulating on the top of the water pump; at the same time, the guide ribs can also strengthen the plastic top wall of the water pump.

[0009] Preferably, the guide structure further includes a guide surface, and the top wall of the water pump gradually decreases from the central part to the edge to form the guide surface. The guide surface can cooperate with the guide ribs to improve the guide effect of the water accumulated on the top of the water pump.

[0010] Preferably, the guide rib is located on the guide surface, and the outer end of the guide rib extends outside the guide surface and to the outer side wall of the water pump. This structure is conducive to improving the guide effect and the strengthening effect of the guide rib on the water pump.

[0011] Preferably, there are at least two guide ribs arranged radially on the guide surface with the center of the water pump as the center of the circle. This structure is conducive to improving the guide effect at various locations on the top wall of the water pump.

[0012] Preferably, the guide surface includes a conical surface arranged at the center of the water pump. Preferably, the guide surface located at the periphery of the conical surface is an inclined curved surface or a plane. The above structure is conducive to guiding the accumulated water from the center to the edge, thereby avoiding the accumulation of accumulated water in the central part of the top of the water pump.

[0013] Preferably, the upper edge of the guide rib is gradually inclined downward from the inside to the outside at least near the outer end.

[0014] Preferably, the guide ribs are multiple and are arranged radially with the center of the water pump as the center of the circle, a relatively closed guide area is formed between two adjacent guide ribs, and the inclined portion of the upper edge of the guide rib forms a gap for connecting adjacent guide areas. When too much water accumulates at the top edge of the water pump, the above structure can connect the water flow at the edge of the water pump, so that the accumulated water automatically finds a quick discharge position to achieve no residual water on the top of the water pump.

[0015] Preferably, the water pump comprises a disc-shaped body, the water inlet is opened at the central part of the bottom wall of the body, the side of the body is provided with a first flow channel and a second flow channel extending in a circumferential spiral, the end of the first flow channel extends upward to form the first water outlet, and the end of the second flow channel forms a second water outlet located at the side of the water pump. The above structure enables the water pump to have two water outlets in different directions to meet the needs of two-way water supply.

[0016] Preferably, the top wall of the water pump is provided with a water guide section extending upward at the end of the corresponding first flow channel, and the water guide section and the top wall of the water pump are smoothly transitioned through an inclined surface. This structure reduces energy loss at the water flow reversal point and is also conducive to achieving no residual water at the end of the first flow channel corresponding to the top wall of the water pump.

[0017] Preferably, the top wall of the water pump protrudes upward at the end of the corresponding second flow channel to form a protrusion that smoothly transitions with the top wall of the water pump. This structure is conducive to achieving no residual water at the end of the second flow channel corresponding to the top wall of the water pump.

[0018] A cleaning machine comprises a water cup, wherein the water cup is provided with a concave water return area, the top of which is covered with a filter plate, and also comprises the above-mentioned water pump, which is arranged in the water return area and has an upper surface lower than the filter plate.

[0019] Preferably, the water pump is arranged close to the local inner wall of the water return area, and a water guide gap is formed between the outer wall of the water pump and the local inner wall. The water guide gap facilitates the water guided to the edge of the water pump top wall to be discharged into the water return area.

[0020] 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 wall of the water return area is surrounded by the periphery of the herringbone structure to form a triangular structure, wherein the first water outlet of the water pump 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 first water outlet of the water pump is arranged corresponding to the central part of the bottom of the washing chamber.

[0021] 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.

[0022] 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.

[0023] Compared with the prior art, the advantages of the utility model are: the water pump of the utility model can be directly installed in the return water area to form an open water flow system, and a diversion structure is arranged on the top of the water pump to guide the water flow from the central part to the edge. The accumulated water on the top of the water pump can be drained away in time to avoid bacterial growth, and this part of the water flow participates in the return flow in time, which is also conducive to increasing the return water flow rate, thereby improving the cleaning effect. 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 Exploded diagram of

[0026] Figure 3 This is an assembly diagram of a water pump and a water cup 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] 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.

[0029] like Figures 1 to 3 As shown, the water pump 3 has a water inlet 33 at the bottom, a first water outlet 31 offset from the center of the water pump 3 at the top, and a guide structure for guiding water flow from the central part to the edge is provided on the top of the water pump 3.

[0030] The above-mentioned flow guiding structure includes a flow guiding rib 36 extending from the center to the edge of the water pump 3. The flow guiding rib 36 facilitates to guide the water on the top of the water pump 3 from the center to the edge, thereby preventing water from accumulating on the top of the water pump; at the same time, the flow guiding rib 36 can also strengthen the top wall of the plastic water pump 3. The flow guiding structure also includes a flow guiding surface 37, and the top wall of the water pump 3 gradually decreases from the center to the edge to form the flow guiding surface 37. The flow guiding surface 37 can cooperate with the flow guiding rib 36 to improve the flow guiding effect of the water accumulated on the top of the water pump 3.

[0031] Specifically, the guide ribs 36 are located on the guide surface 37, and the outer ends of the guide ribs 36 extend outside the guide surface 37 and to the outer wall of the water pump 3. This structure is conducive to improving the guide effect and the strengthening effect of the guide ribs on the water pump. There are at least two guide ribs 36 and they are arranged radially on the guide surface 37 with the center of the water pump 3 as the center of the circle. This structure is conducive to improving the guide effect at various places on the top wall of the water pump.

[0032] The guide surface 37 of this embodiment includes a conical surface 371 arranged at the center of the water pump 3. The guide surface 37 located outside the conical surface 371 is an inclined curved surface or a flat surface. The above structure is conducive to guiding the accumulated water from the center to the edge, thereby preventing the accumulated water from accumulating in the central part of the top of the water pump.

[0033] The upper edge of the guide rib 36 gradually slopes downward from the inside to the outside at least near the outer end. There are multiple guide ribs 36 and they are arranged radially with the center of the water pump 3 as the center of the circle. In this embodiment, 5 guide ribs 36 are provided, and a relatively closed guide area 361 is formed between two adjacent guide ribs 36. The inclined portion of the upper edge of the guide rib 36 forms a gap 362 for connecting adjacent guide areas 361. When too much water accumulates at the top edge of the water pump 3, the above structure can connect the water flow at the edge of the water pump 3, so that the accumulated water automatically finds a quick discharge position to achieve no residual water on the top of the water pump.

[0034] The water pump 3 of this embodiment includes a disc-shaped body, a water inlet 33 is opened in the central part of the bottom wall of the body, and the side of the body is provided with a first flow channel 34 and a second flow channel 35 extending in a circumferential spiral direction, the end of the first flow channel 34 extends upward to form a first water outlet 31, and the end of the second flow channel 35 forms a second water outlet 351 located on the side of the water pump 3. The above structure enables the water pump to have two water outlets in different directions to meet the needs of two-way water supply.

[0035] The top wall of the water pump 3 is provided with a water guide section 32 extending upward at the end of the corresponding first flow channel 34, and the water guide section 32 and the top wall of the water pump 3 are smoothly transitioned through the inclined surface 321. This structure reduces the energy loss at the water flow reversal point, and is also conducive to achieving no residual water at the end of the top wall of the water pump 3 corresponding to the first flow channel 34. The top wall of the water pump 3 protrudes upward at the end of the corresponding second flow channel 35 to form a protrusion 352 that smoothly transitions with the top wall of the water pump 3. This structure is conducive to achieving no residual water at the end of the top wall of the water pump 3 corresponding to the second flow channel 35.

[0036] The cleaning machine of this embodiment includes a water cup 2 and the water pump 3. The water cup 2 is provided with a concave water return area 21. The top of the water return area 21 is covered with a filter plate 22. The water pump 3 is arranged in the water return area 21 and the upper surface is arranged below the filter plate 22. The water pump 3 is arranged close to the local inner wall of the water return area 21, and a water guide gap 211 is formed between the outer wall of the water pump 3 and the local inner wall. The water guide gap 211 facilitates the water guided to the edge of the top wall of the water pump 3 to be discharged into the water return area 21.

[0037] The return water area 21 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, and the side wall of the return water area 21 is enclosed in the periphery of the herringbone structure to form a triangular structure, wherein the first water outlet 31 of the water pump 3 extends to the central part of the herringbone structure. The return water 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, and the first water outlet 31 of the water pump 3 is arranged corresponding to the central part of the bottom of the washing chamber.

[0038] The water pump 3 of this embodiment can be directly installed in the return water area 21 to form an open water flow system. A guide structure for guiding the water flow from the central part to the edge is set on the top of the water pump 3. The accumulated water on the top of the water pump 3 can be discharged in time to avoid bacterial growth. In addition, this part of the water flow participates in the return flow in time, which is also conducive to increasing the return water flow rate and thus improving the cleaning effect.

[0039] 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, Features: The water pump (3) has a water inlet (33) at the bottom and a first water outlet (31) offset relative to the center of the water pump (3) at the top. The top of the water pump (3) is provided with a flow guide structure for guiding water flow from the central part to the edge.

2. The water pump for a cleaning machine according to claim 1, Features: The flow guiding structure comprises flow guiding ribs (36) extending from the center to the edge of the water pump (3).

3. The water pump for a cleaning machine according to claim 2, Features: The flow-guiding structure further comprises a flow-guiding surface (37), and the top wall of the water pump (3) gradually decreases from the central part to the edge, thereby forming the flow-guiding surface (37).

4. The water pump for a cleaning machine according to claim 3, Features: The guide rib (36) is located on the guide surface (37), and the outer end of the guide rib (36) extends outside the guide surface (37) to the outer side wall of the water pump (3).

5. The water pump for a cleaning machine according to claim 3, Features: There are at least two guide ribs (36) which are arranged radially on the guide surface (37) with the center of the water pump (3) as the center of the circle.

6. The water pump for a cleaning machine according to claim 3, Features: The flow guide surface (37) comprises a conical surface (371) arranged corresponding to the center of the water pump (3).

7. The water pump for a cleaning machine according to claim 6, Features: The flow guide surface (37) located outside the conical surface (371) is an inclined curved surface or a flat surface.

8. The water pump for a cleaning machine according to claim 2, Features: The upper edge of the guide rib (36) is gradually inclined downward from the inside to the outside at least near the outer end.

9. The water pump for a cleaning machine according to claim 8, Features: The guide ribs (36) are multiple and are arranged radially with the center of the water pump (3) as the center of the circle, and a relatively closed guide area (361) is formed between two adjacent guide ribs (36). The inclined portion of the upper edge of the guide rib (36) forms a gap (362) for connecting adjacent guide areas (361).

10. The water pump for a cleaning machine according to any one of claims 1 to 9, Features: The water pump (3) comprises a disc-shaped body, the water inlet (33) is opened in the central part of the bottom wall of the body, and the side of the body is provided with a first flow channel (34) and a second flow channel (35) extending in a circumferential spiral direction, the end of the first flow channel (34) extends upward to form the first water outlet (31), and the end of the second flow channel (35) forms a second water outlet (351) located on the side of the water pump (3).

11. The water pump for a cleaning machine according to claim 10, Features: The top wall of the water pump (3) is provided with a water guide section (32) extending upward at the end of the corresponding first flow channel (34), and a smooth transition is formed between the water guide section (32) and the top wall of the water pump (3) via an inclined surface (321).

12. The water pump for a cleaning machine according to claim 10, Features: The top wall of the water pump (3) protrudes upward at the end of the corresponding second flow channel (35) to form a protrusion (352) that smoothly transitions with the top wall of the water pump (3).

13. A cleaning machine, comprising a water cup (2), wherein the water cup (2) is provided with a concave water return area (21), the top of the water return area (21) is covered with a filter plate (22), Features: It also comprises a water pump (3) according to any one of claims 1 to 12, wherein the water pump (3) is arranged in the return water area (21) and the upper surface of the water pump (3) is arranged below the filter plate (22).

14. The cleaning machine according to claim 13, Features: The water pump (3) is arranged close to a local inner wall of the water return area (21), and a water guide gap (211) is formed between an outer wall of the water pump (3) and the local inner wall.

15. The cleaning machine according to claim 13, Features: 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 around the periphery of the herringbone structure to form a triangular structure, wherein the first water outlet (31) of the water pump (3) extends to the central portion of the herringbone structure.

16. The cleaning machine according to claim 15, Features: 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 first 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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