Water pump for cleaning machine and cleaning machine

Abstract

The water pump comprises a pump shell, a water inlet is formed in the bottom wall of the pump shell, a water outlet flow channel extending outwards is arranged on the side portion of the pump shell, a sinking area is arranged in the center of the bottom wall of the pump shell, the water inlet is formed in the sinking area, and the water outlet flow channel extends outwards. The inner bottom wall of the pump shell is further provided with a flow guide groove extending from the edge of the sinking area to the outside of the water outlet flow channel. The sinking area is arranged on the periphery of the water inlet at the bottom of the pump shell, after cleaning is completed, residual water in the pump shell can be guided to the water inlet to be discharged through the sinking area, and meanwhile residual water at an external pipeline and a water outlet flow channel of the pump shell can flow back to the sinking area through the flow guide groove to be discharged through the water inlet. Therefore, no residual water exists in the pump shell and an external pipeline, bacteria breeding in the pump shell is avoided, and the drying effect of the water pump, the washing cavity and tableware in the washing cavity 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 Chinese invention patent application with publication number CN115500758A, "A spatial guide vane and an open water pump and a cleaning machine" (application number: CN202211216030.7), discloses an open water pump structure, which includes a pump casing, a spatial guide vane and an impeller. The bottom of the pump casing is provided with a water suction port, the top of the pump casing is provided with a first water outlet, and the side is provided with a second water outlet; the spatial guide vane includes a cover plate and a guide vane, the guide vane is multiple and vertically arranged on the lower surface of the cover plate, and the multiple guide vanes are spaced apart in the circumferential direction of the cover plate and are arranged from the edge of the cover plate inward against the direction of the water flow. The cover plate is divided into a first part and a second part which are connected to each other in the circumferential direction, the guide vane is arranged corresponding to the first part, an opening is formed at the second part, a water diversion channel is constrained between two adjacent guide vanes, and the cover plate portion corresponding to the top of the guide vane is at least partially missing to form a gap for connecting the water diversion channel with the top of the cover plate, the cover plate is transversely arranged in the middle of the pump casing and divides the inner cavity of the pump casing into relatively independent upper and lower cavities, the first water outlet is connected to the upper cavity, and the second water outlet is connected to the lower cavity; the impeller is rotatably arranged in the lower cavity to provide water pumping power.

[0004] The above-mentioned water pump meets the two-way water supply demand by setting a first water outlet and a second water outlet. Among them, the second outlet extending laterally is arranged horizontally, so it is easy for residual water to remain in the flow channel after cleaning, which further affects the drainage of the residual water in the pump casing, not only easily breeds bacteria, but also greatly affects the drying of the washing chamber and the internal tableware; at the same time, the overall drying effect of the outer surface and interior of the pump casing is not ideal. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide a water pump for a cleaning machine which can drain the remaining water in the pump casing to avoid bacterial growth and improve the drying 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 cleaning machine using the water pump according to the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve at least one of the above technical problems is:

[0008] A water pump for a cleaning machine comprises a pump casing, wherein a water inlet is formed on the bottom wall of the pump casing, a water outlet channel extending outward is provided on the side of the pump casing, a sinking area is provided in the central part of the bottom wall of the pump casing, the water inlet is formed in the sinking area, and a guide groove extending from the edge of the sinking area to the outside of the water outlet channel is formed on the inner bottom wall of the pump casing.

[0009] Preferably, the top wall of the water outlet channel is gradually lifted linearly relative to the top wall of the pump housing along the water outlet direction so that the water outlet channel forms an upward-probing water outlet port. This structure facilitates the realization of no residual water in the water outlet channel without affecting the water outlet flow state.

[0010] Preferably, the bottom wall of the water outlet channel gradually tilts upward along the water flow direction from the junction with the bottom wall of the pump housing to form a guide curved surface. This structure facilitates the residual water in the external pipe to flow back into the pump housing through the water outlet channel and be discharged after cleaning, so that there is no residual water in the pipe and the pump housing.

[0011] Preferably, the guide groove is arranged concave relative to the inner bottom wall of the pump housing and the guide curved surface, the first end of the guide groove is connected to the sinking area, and the second end of the guide groove passes through the guide curved surface and extends to the outer port of the water outlet channel. This structure cooperates with the sinking area and the water inlet therein to ensure that the accumulated water that flows back into the pump housing is discharged, so that there is no residual water in the pump housing and the water outlet channel.

[0012] Preferably, the inner bottom wall of the pump casing corresponding to the sinking area gradually tilts downward from the edge to the water inlet to form a guide surface, which is conducive to improving the discharge effect of the residual water at the bottom of the pump casing. Preferably, the upper top wall of the pump casing at least partially tilts downward from the central part to the edge to form a water guide surface, which is conducive to improving the discharge effect of the residual water at the top of the pump casing. After cleaning, due to the loss of water pump power, the water in the upper cleaning system pipeline will flow back to the inside of the pump casing cavity, and some residual water in the bottom spray system will flow through the upper surface of the pump casing. The above-mentioned guide structure can realize the discharge of residual water inside and outside the pump casing respectively.

[0013] Preferably, the slope of the guide surface relative to the horizontal plane is a, 3°<a<7°. Further preferably, a hydrophobic coating is coated on the guide surface; a hydrophilic coating is coated on the inner bottom wall of the pump casing outside the sinking area. Preferably, the slope of the water guide surface relative to the horizontal plane is b, 3°<b<6°. Further preferably, a hydrophobic coating is coated on the water guide surface; a hydrophilic coating is coated on the upper top wall of the pump casing outside the water guide surface. Preferably, a circular horizontal area is formed in the center of the upper top wall of the pump casing, the water guide surface extends radially around the horizontal area, and the upper top wall of the pump casing corresponding to the horizontal area is coated with a hydrophilic coating. During the drying process, the cleaning machine relies on the gravity of water droplets to flow naturally to the water cup valve pump for drainage. The hydrophobic coating treatment is applied to these areas with a slope greater than 3° to prevent the water droplets from dispersing and achieve rapid diversion; the hydrophilic coating treatment is applied to the area with a slope less than 3° to increase the contact area between the water droplet surface and the plastic parts, which is conducive to rapid drying.

[0014] Preferably, the side of the pump housing is also provided with a water-drawing pipe extending outward in a spiral, and the outer end of the water-drawing pipe is smoothly connected to the vertically arranged water-guiding pipe through a connecting section extending upward in a spiral. The water-drawing pipe and the water-guiding pipe are used to supply water to the bottom spray arm. By using the above-mentioned spiral connecting section, the remaining water in the bottom spray arm, the water-drawing pipe, and the water-guiding pipe can be discharged through the diversion structure in the pump housing after cleaning.

[0015] 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.

[0016] Preferably, a slag basket and a heating element are also provided in the return water area. From a top view, the water pump, slag basket and heating element are arranged in a herringbone structure. The side walls of the return water area are enclosed in the periphery of the herringbone structure, wherein the water pump is also provided with an offset water outlet and the water outlet extends to the central part of the herringbone structure. Preferably, the return water area is a triangular structure with a smooth transition at the corners, and each corner of the triangular structure encloses a first installation area, a second installation area and a third installation area with the adjacent straight side parts, respectively. The first installation area is used to install the water pump, the second installation area is used to install the heating element, and the third installation area is used to install the slag basket. Preferably, the return water area is arranged in the center of the bottom of the box, the water pump is offset relative to the center of the bottom wall of the box, and the water outlet of the water pump is arranged corresponding to the central part of the bottom of the box.

[0017] 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.

[0018] Compared with the prior art, the advantages of the utility model are: the utility model sets a sinking area at the periphery of the water inlet at the bottom of the pump casing. After cleaning, the remaining water in the pump casing can be diverted to the water inlet through the sinking area for discharge. At the same time, the remaining water in the external pipeline and the water outlet channel of the pump casing can also flow back to the sinking area through the diversion groove and be discharged through the water inlet, thereby achieving no residual water inside the pump casing and the external pipeline, avoiding the growth of bacteria in the pump casing, and is beneficial to improving the drying effect of the water pump, the washing chamber and the tableware therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the water pump according to an embodiment of the utility model;

[0020] Figure 2 for Figure 1 Another angle view;

[0021] Figure 3 A cross-sectional view of a pump housing in an embodiment of the utility model;

[0022] Figure 4 Another cross-sectional view of the pump housing in the embodiment of the utility model;

[0023] Figure 5 This is an assembly diagram of the water pump in the water return area in the embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of the outer bottom structure of the cleaning machine in the embodiment of the utility model. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] like Figures 1 to 6 As shown, the water pump 3 for the cleaning machine in this embodiment includes a pump casing 36. The main body of the pump casing 316 is disc-shaped. A water inlet 33 is opened on the bottom wall of the pump casing 36. A water outlet channel 38 extending outward is arranged on the side of the pump casing 36. A sinking area 361 is arranged in the central part of the bottom wall of the pump casing 36. The water inlet 33 is opened in the sinking area 361. The inner bottom wall of the pump casing 36 is also provided with a guide groove 362 extending from the edge of the sinking area 361 to the outside of the water outlet channel 38.

[0027] The top wall of the water outlet channel 38 gradually rises upward relative to the top wall of the pump housing 36 along the water outlet direction, so that the water outlet channel 38 forms an upward-probing water outlet port 381. This structure facilitates the water outlet channel 38 to be free of residual water without affecting the water outlet flow state.

[0028] The bottom wall of the water outlet channel 38 gradually tilts upward along the water flow direction from the junction with the bottom wall of the pump housing 36 to form a guide curved surface 382. This structure facilitates the residual water in the external pipe to flow back to the pump housing 36 through the water outlet channel 38 after cleaning, so that there is no residual water in the pipe and the pump housing.

[0029] The guide groove 362 is arranged concave relative to the inner bottom wall of the pump housing 36 and the guide curved surface 382, ​​the first end of the guide groove 362 is connected to the sinking area 361, and the second end of the guide groove 362 passes through the guide curved surface 382 and extends to the outer end of the water outlet flow channel 38. This structure cooperates with the sinking area 361 and the water inlet 33 therein to ensure that the accumulated water flowing back into the pump housing 36 is discharged, so that there is no residual water in the pump housing 36 and the water outlet flow channel 38.

[0030] The inner bottom wall of the pump housing 36 corresponding to the sinking area 361 gradually slopes downward from the edge to the water inlet 33 to form a guide surface 3611, which is conducive to improving the discharge effect of the residual water at the bottom of the pump housing 36. The upper top wall of the pump housing 36 partially slopes downward from the central part to the edge to form a water guide surface 363, which is conducive to improving the discharge effect of the residual water at the top of the pump housing 36. After the cleaning is completed, due to the loss of water pump power, the water in the upper cleaning system pipeline will flow back to the inside of the pump housing cavity, and some residual water in the bottom spray system will flow through the upper surface of the pump housing. The above-mentioned guide structure can realize the discharge of residual water inside and outside the pump housing respectively.

[0031] The slope of the guide surface 3611 relative to the horizontal plane is a, 3°<a<7°. The guide surface 3611 is coated with a hydrophobic coating; the inner bottom wall of the pump casing 36 outside the sinking area 361 is coated with a hydrophilic coating. The slope of the water guide surface 363 relative to the horizontal plane is b, 3°<b<6°. Further preferably, the water guide surface is coated with a hydrophobic coating; the upper top wall of the pump casing 36 outside the water guide surface is coated with a hydrophilic coating. A circular horizontal area 364 is formed in the center of the upper top wall of the pump casing 36, and the water guide surface 363 extends radially around the horizontal area 364, and the upper top wall of the pump casing 36 corresponding to the horizontal area 364 is coated with a hydrophilic coating. During the drying process, water droplets flow naturally to the water cup valve pump due to gravity for drainage. Areas with a slope greater than 3° are treated with a hydrophobic coating to prevent water droplets from dispersing and achieve rapid diversion. Areas with a slope less than 3° are treated with a hydrophilic coating to increase the contact area between the water droplet surface and plastic parts, which is conducive to rapid drying.

[0032] The side of the pump housing 36 is also provided with a water-drawing pipe 365 extending outward in a spiral, and the outer end of the water-drawing pipe 365 is smoothly connected to a vertically arranged water-guiding pipe 367 through a connecting section 366 extending upward in a spiral. The water-drawing pipe 365 and the water-guiding pipe 367 are used to supply water to the bottom spray arm. The spiral connecting section 366 is used to connect them, and the remaining water in the bottom spray arm and the water-drawing pipe 365 and the water-guiding pipe 367 can be discharged through the diversion structure in the pump housing 36 after cleaning.

[0033] The cleaning machine of this embodiment includes a housing 1, a concave water return area 21 is provided at the bottom of the housing 1, and the water pump 3 is also provided. 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, and the side wall of the water return area 21 is surrounded by the periphery of the herringbone structure, wherein the water pump 3 is also provided with an offset water outlet 3671 and the water outlet 3671 extends to the central part of the herringbone structure. The upper end of the water guide pipe 367 in this embodiment constitutes the water outlet 3671.

[0034] The return water area 21 is a triangular structure with a smooth transition of corners. Each corner of the triangular structure and the adjacent straight side parts respectively enclose the first installation area 10, the second installation area 20, and the third installation area 30. The first installation area 10 is used to install the water pump 3, the second installation area 20 is used to install the heating element 5, and the third installation area 30 is used to install the slag collection basket 4. The return water area 21 is arranged in the center of the bottom of the box body 1, the water pump 3 is offset relative to the center of the bottom wall of the box body 1, and the water outlet 3671 of the water pump 3 is arranged corresponding to the central part of the bottom of the box body 1.

[0035] In this embodiment, a sinking area 361 is set around the water inlet 33 at the bottom of the pump casing 36. After cleaning, the remaining water in the pump casing 36 can be diverted to the water inlet 33 through the sinking area 361 for discharge. At the same time, the remaining water in the external pipeline and the water outlet channel 38 of the pump casing 36 can also flow back to the sinking area 361 through the guide groove 362 and be discharged through the water inlet 33, thereby achieving the goal of no residual water inside the pump casing 36 and the external pipeline, avoiding the growth of bacteria in the pump casing 36, and helping to improve the drying effect of the water pump 3, the washing chamber and the tableware therein.

[0036] 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), wherein the bottom wall of the pump housing (36) is provided with a water inlet (33), and the side of the pump housing (36) is provided with a water outlet channel (38) extending outward, characterized in that: A sinking area (361) is provided at the central portion of the bottom wall of the pump housing (36), the water inlet (33) is opened in the sinking area (361), and the inner bottom wall of the pump housing (36) is also provided with a guide groove (362) extending from the edge of the sinking area (361) to the outside of the water outlet channel (38).

2. The water pump for a cleaning machine according to claim 1, characterized in that: The top wall of the water outlet channel (38) is gradually lifted upward relative to the top wall of the pump housing (36) along the water outlet direction, so that the water outlet channel (38) forms an upward-probing water outlet port (381).

3. The water pump for a cleaning machine according to claim 1, characterized in that: The bottom wall of the water outlet channel (38) gradually tilts upward along the water flow direction from the junction with the bottom wall of the pump housing (36) to form a flow guide curved surface (382).

4. The water pump for a cleaning machine according to claim 3, characterized in that: The guide groove (362) is arranged concave relative to the inner bottom wall of the pump housing (36) and the guide curved surface (382); the first end of the guide groove (362) is connected to the sinking area (361); the second end of the guide groove (362) passes through the guide curved surface (382) and extends to the outer port of the water outlet channel (38).

5. The water pump for a cleaning machine according to any one of claims 1 to 4, characterized in that: The inner bottom wall of the pump casing (36) corresponding to the sinking area (361) gradually slopes downward from the edge toward the water inlet (33) to form a guide surface (3611).

6. The water pump for a cleaning machine according to claim 5, characterized in that: The slope of the guide surface (3611) relative to the horizontal plane is a, 3°<a<7°.

7. The water pump for a cleaning machine according to claim 5, characterized in that: The guide surface (3611) is coated with a hydrophobic coating.

8. The water pump for a cleaning machine according to claim 5, characterized in that: The inner bottom wall of the pump housing (36) outside the sinking area (361) is coated with a hydrophilic coating.

9. The water pump for a cleaning machine according to any one of claims 1 to 4, characterized in that: At least a portion of the upper top wall of the pump housing (36) gradually slopes downward from the central portion to the edge to form a water guide surface (363).

10. The water pump for a cleaning machine according to claim 9, characterized in that: The slope of the water guide surface (363) relative to the horizontal plane is b, 3°<b<6°.

11. The water pump for a cleaning machine according to claim 9, characterized in that: The water-conducting surface (363) is coated with a hydrophobic coating.

12. The water pump for a cleaning machine according to claim 9, characterized in that: A hydrophilic coating is coated on the top wall of the pump housing (36) outside the water guide surface (363).

13. The water pump for a cleaning machine according to claim 9, characterized in that: A circular horizontal area (364) is formed in the center of the upper top wall of the pump housing (36), and the water-guiding surface (363) extends radially around the outer periphery of the horizontal area (364). The upper top wall of the pump housing (36) corresponding to the horizontal area (364) is coated with a hydrophilic coating.

14. The water pump for a cleaning machine according to any one of claims 1 to 4, characterized in that: The side of the pump housing (36) is also provided with a water-drawing pipe (365) extending outward in a spiral, and the outer end of the water-drawing pipe (365) is smoothly connected to a vertically arranged water-conducting pipe (367) through a connecting section (366) extending upward in a spiral.

15. 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 the water pump according to any one of claims 1 to 14.

16. The cleaning machine according to claim 15, characterized in that: The return water area (21) 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 wall of the return water area (21) is surrounded by the periphery of the herringbone structure. The water pump is also provided with an offset water outlet (3671) and the water outlet (3671) extends to the central part of the herringbone structure.

17. The cleaning machine according to claim 16, characterized in that: The water return area (21) is a triangular structure with a smoothly rounded corner, and each corner of the triangular structure and its adjacent straight side portion respectively enclose a first installation area (10), a second installation area (20), and a third installation area (30); the first installation area (10) is used to install a water pump, the second installation area (20) is used to install a heating element (5), and the third installation area (30) is used to install a slag collection basket (4).

18. The cleaning machine according to claim 16, characterized in that: The water return area (21) is arranged in the center of the bottom of the box body (1), the water pump is offset relative to the center of the bottom wall of the box body (1), and the water outlet (3671) of the water pump is arranged corresponding to the central part of the bottom of the box body (1).

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