Water pump for cleaning machine and cleaning machine

Abstract

The water pump comprises a disc-shaped volute, a water inlet is formed in the bottom of the volute, a water outlet is formed in the side portion of the volute, and a partition plate spirally extending from the water outlet in the direction opposite to the water flow direction is arranged on the inner wall of the volute. The partition plate divides an inner cavity of the volute into a volute cavity located in the middle of the volute and a volute channel located on the edge of the volute and used for outputting water in the volute cavity, and the water outlet is located at the outer end of the volute channel. The partition plate used for dividing the inner cavity of the volute into the volute cavity and the volute channel is arranged in the volute, the volute cavity is communicated with the water inlet, and along with rotation of the impeller, water flow is thrown into the volute channel after being pressurized and then is shunted or output at the outlet of the volute channel, so that the water inlet and the water outlet are relatively separated through the structure, interference between the water inlet and the water outlet is avoided, and the service life of the water inlet and the water outlet is prolonged. Therefore, water flow energy loss is avoided, large water flow and lift can be maintained, and the efficiency of the water pump 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. 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. However, in order to convert the direction of one of the water flows from the circumferential direction of the water pump to the axial direction, it is necessary to set a spatial guide vane structure in the pump chamber. The existence of the spatial guide vane structure causes the water pump to partially interfere with the restrictions of the water inlet and diversion structure, which causes a certain degree of loss of water flow energy, thereby affecting the water outlet flow rate and water pressure, making it difficult to improve the efficiency of the water pump. 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 that can eliminate the interference between water intake and water distribution, thereby avoiding water flow energy loss, maintaining a large water flow and head, and thus improving efficiency, in response to the current status of the existing technology.

[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 disc-shaped volute, a water inlet is formed at the bottom of the volute, a water outlet is formed at the side, a partition is provided on the inner wall of the volute and spirally extends from the water outlet in the opposite direction of the water flow, the partition divides the inner cavity of the volute into a volute cavity located in the middle of the volute and a volute channel located at the edge of the volute and used to output water in the volute cavity, and the water outlet is located at the outer end of the volute channel.

[0009] Preferably, the outer end of the volute is connected with a first flow channel and a second flow channel for diverting water, and a tongue is formed between the first flow channel and the second flow channel, and the tongue is arranged toward the outer end of the volute. The water is diverted at the outer end of the volute to eliminate the interference between the water inlet of the volute cavity and the water outlet of the volute, reduce the fluid energy loss, and thus maintain a large water pressure and head.

[0010] Preferably, the upstream portion of the first flow channel is a first spiral section that matches the outer periphery of the volute, and the downstream portion of the first flow channel is a direct flow section that is tangentially connected to the first spiral section. The outer port of the direct flow section constitutes the lateral water outlet of the water pump. With such a structure, the fluid energy loss can be further reduced for the water flow output laterally.

[0011] Preferably, the second flow channel is a second spiral section extending spirally around the first flow channel, and the end of the second spiral section is bent upward to form a guide section for conveying the water flow upward. This structure is convenient for converting the lateral water outflow of the volute into axial water outflow, and there is no need to set a water flow diversion and reversing member such as a space guide vane in the volute, which is conducive to realizing the axial output of the water flow on the basis of simplifying the overall structure of the volute and reducing the volume.

[0012] Preferably, the outer end of the second spiral segment is a blind end, the guide segment is arranged on the top wall of the volute and its lower port is arranged corresponding to the end of the second spiral segment, and the upper port of the guide segment constitutes the top water outlet of the water pump.

[0013] Preferably, a rotatable centrifugal impeller is provided in the volute cavity, and the water inlet is opened in the central part of the bottom wall of the volute and arranged corresponding to the centrifugal impeller.

[0014] 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, the first flow channel is used to supply water for the upper layer spraying, and the second flow channel is used to supply water for the lower layer spraying.

[0015] Preferably, a slag collection basket and a heating element are also provided in the return water area. From a top view, the water pump, slag collection basket and heating element are arranged in a herringbone structure. The side walls of the return water area are surrounded by the periphery of the herringbone structure, wherein the outer port of the first flow channel of the water pump is arranged toward an inner side wall of the return water area and an opening corresponding to the outer port of the first flow channel is opened on the inner side wall. The end of the second flow channel of the water pump is formed as an offset water outlet and extends to the central part of the herringbone structure. The return water area is a triangular structure with a smooth transition at the corners, including a first straight side, a second straight side and a third straight side connected end to end, and each straight side is smoothly connected at the intersection by an arc segment. The return water area is arranged in the center of the bottom of the box body, and the water pump is offset relative to the center of the bottom wall of the box body. The offset water outlet of the water pump is arranged corresponding to the central part of the bottom of the box body.

[0016] 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.

[0017] Preferably, the bottom wall of the volute is provided with a water retaining rib for gathering water from the slag collecting basket and the heating element side to the water inlet, and the lower end of the water retaining rib is arranged close to the inner bottom wall of the water return area. This structure can improve water absorption efficiency and reduce fluid energy loss.

[0018] Compared with the prior art, the advantages of the utility model are: a partition is arranged in the volute for dividing the inner cavity of the volute into a volute cavity and a volute channel; the volute cavity is connected with the water inlet; as the impeller rotates, the water flow is thrown into the volute channel after being pressurized, and then is diverted or output at the volute channel outlet; the above structure relatively separates the water inlet and the water outlet, avoiding interference between the two, thereby avoiding water flow energy loss, which is conducive to maintaining a large water flow rate and head, thereby improving the efficiency of the water pump. 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 Schematic diagram of the bottom structure;

[0021] Figure 3 for Figure 1 A cross-sectional view of

[0022] Figure 4 It is a schematic diagram of the structure of a cleaning machine according to an embodiment of the utility model. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] The water pump used for the cleaning machine in this embodiment is an open water pump, that is, it is directly arranged in the washing chamber of the cleaning machine and communicates with the washing chamber without the need for an external pipeline to deliver water.

[0025] like Figures 1 to 4 As shown, the water pump of this embodiment includes a disc-shaped volute 1, a water inlet 11 is formed at the bottom of the volute 1, a water outlet 12 is formed at the side, and a partition 13 is provided on the inner wall of the volute 1, which spirally extends from the water outlet 12 in the opposite direction of the water flow. The partition 13 divides the inner cavity of the volute 1 into a volute cavity 101 located in the middle of the volute 1 and a volute 102 located at the edge of the volute 1 and used to output the water in the volute cavity 101. The water outlet 12 is located at the outer end of the volute 102.

[0026] The outer end of the volute 102 is connected with a first flow channel 01 and a second flow channel 02 for diverting water, and a partition tongue 103 is formed between the first flow channel 01 and the second flow channel 02, and the partition tongue 103 is arranged toward the outer end of the volute 102. The water is diverted at the outer end of the volute 102 to eliminate the interference between the water inlet of the volute cavity 101 and the water outlet of the volute 102, reduce the fluid energy loss, and thus maintain a large water pressure and head.

[0027] The upstream part of the first flow channel 01 is the first spiral section 011 that matches the outer periphery of the volute 1, and the downstream of the first flow channel 01 is the straight section 012 that is tangentially connected to the first spiral section 011. The outer port of the straight section 012 constitutes the lateral water outlet 013 of the water pump. With such a structure, the fluid energy loss can be further reduced for the water flow output laterally.

[0028] The second flow channel 02 is a second spiral section 021 that spirally extends outside the first flow channel 01. The end of the second spiral section 021 is bent upward to form a guide section 022 for conveying the water flow upward. This structure is convenient for converting the lateral water outflow of the volute 1 into axial water outflow, and there is no need to set a water flow diversion and reversing component such as a space guide vane in the volute 1, which is conducive to realizing the axial output of the water flow on the basis of simplifying the overall structure of the volute and reducing the volume. The outer end of the second spiral section 021 is a blind end, and the guide section 022 is arranged on the top wall of the volute 1 and its lower port corresponds to the end of the second spiral section 021. The upper port of the guide section 022 constitutes the top water outlet 023 of the water pump.

[0029] A rotatable centrifugal impeller is disposed in the volute cavity 101 , and the water inlet 11 is opened at the central portion of the bottom wall of the volute 1 and is arranged corresponding to the centrifugal impeller.

[0030] The cleaning machine of this embodiment includes a box body 2, a concave water return area 21 is arranged at the bottom of the box body 2, and also includes the above-mentioned water pump, which is arranged in the water return area 21, the first flow channel 01 is used to supply water for the upper layer spraying, and the second flow channel 02 is used to supply water for the lower layer spraying.

[0031] 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, the slag collection basket 4 and the heating element 5 are arranged in a herringbone structure. The side wall of the return water area 21 is surrounded by the periphery of the herringbone structure, wherein the outer port of the first flow channel 01 of the water pump is arranged toward an inner side wall of the return water area 21 and an opening corresponding to the outer port of the first flow channel is opened on the inner side wall. A water pipe for conveying water upward for top spraying water supply is connected outside the opening. The end of the second flow channel 02 of the water pump is formed as an offset water outlet (i.e., the above-mentioned top water outlet 023) and extends to the central part of the herringbone structure. The return water area 21 is a triangular structure with a smooth transition at the corners, including a first straight edge 211, a second straight edge 212, and a third straight edge 213 connected end to end, and each straight edge is smoothly connected by a circular arc segment at the intersection. The water return area 21 is arranged in the center of the bottom of the box body 2 , the water pump is offset relative to the center of the bottom wall of the box body 2 , and the offset water outlet of the water pump is arranged corresponding to the central part of the bottom of the box body 2 .

[0032] 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.

[0033] The bottom wall of the volute 1 is provided with a water retaining rib 14 for gathering the water from the slag collecting basket 4 and the heating element 5 to the water inlet 33, and the lower end of the water retaining rib 14 is arranged close to the inner bottom wall of the water return area 21. This structure can improve the water absorption efficiency and reduce the fluid energy loss.

[0034] In this embodiment, a partition 13 is provided in the volute 1 for dividing the inner cavity of the volute into a volute cavity 101 and a volute path 102. The volute cavity 101 is connected to the water inlet 11. As the impeller rotates, the water flow is thrown into the volute path 102 after being pressurized, and then is diverted or output at the outlet of the volute path 102. The above structure relatively separates the water inlet and the water outlet, avoiding interference between the two, thereby avoiding water flow energy loss, which is conducive to maintaining a large water flow and head, thereby improving the efficiency of the water pump.

[0035] 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 disc-shaped volute (1), the volute (1) having a water inlet (11) at the bottom and a water outlet (12) at the side, characterized in that: The inner wall of the volute (1) is provided with a partition (13) spirally extending from the water outlet (12) in the opposite direction of the water flow, and the partition (13) divides the inner cavity of the volute (1) into a volute cavity (101) located in the middle of the volute (1) and a volute channel (102) located at the edge of the volute (1) and used to output water in the volute cavity (101), and the water outlet (12) is located at the outer end of the volute channel (102).

2. The water pump for a cleaning machine according to claim 1, characterized in that: The outer end of the volute (102) is connected to a first flow channel (01) and a second flow channel (02) for diverting water, and a partition tongue (103) is formed between the first flow channel (01) and the second flow channel (02), and the partition tongue (103) is arranged toward the outer end of the volute (102).

3. The water pump for a cleaning machine according to claim 2, characterized in that: The upstream portion of the first flow channel (01) is a first spiral section (011) matching the periphery of the volute (1), and the downstream portion of the first flow channel (01) is a straight flow section (012) tangentially connected to the first spiral section (011).

4. The water pump for a cleaning machine according to claim 3, characterized in that: The outer port of the direct current section (012) forms a lateral water outlet (013) of the water pump.

5. The water pump for a cleaning machine according to claim 2, characterized in that: The second flow channel (02) is a second spiral section (021) extending spirally around the periphery of the first flow channel (01), and the end of the second spiral section (021) is bent upward to form a guide section (022) for conveying the water flow upward.

6. The water pump for a cleaning machine according to claim 5, characterized in that: The outer end of the second spiral section (021) is a blind end, the guide section (022) is arranged on the top wall of the volute (1) and its lower port is arranged corresponding to the end of the second spiral section (021), and the upper port of the guide section (022) constitutes the top water outlet (023) of the water pump.

7. The water pump for a cleaning machine according to any one of claims 2 to 6, characterized in that: A rotatable centrifugal impeller is disposed in the volute cavity (101), and the water inlet (11) is opened at the central portion of the bottom wall of the volute (1) and is arranged corresponding to the centrifugal impeller.

8. A cleaning machine, comprising a housing (2), wherein a concave water return area (21) is provided at the bottom of the housing (2), characterized in that: It also comprises a water pump as claimed in any one of claims 2 to 7, wherein the water pump is arranged in the water return area (21), the first flow channel (01) is used to supply water for the upper layer spraying, and the second flow channel (02) is used to supply water for the lower layer spraying.

9. The cleaning machine according to claim 8, 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, the slag collecting basket (4) and the heating element (5) are arranged in a herringbone structure. The side wall of the water return area (21) surrounds the periphery of the herringbone structure. The outer port of the first flow channel (01) of the water pump is arranged toward an inner side wall of the water return area (21) and an opening corresponding to the outer port of the first flow channel (01) is formed on the inner side wall. The end of the second flow channel (02) of the water pump is formed as an offset water outlet and extends to the central part of the herringbone structure.

10. The cleaning machine according to claim 9, characterized in that: The bottom wall of the volute (1) is provided with a water retaining rib (14) for gathering water from the slag collecting basket (4) and the heating element (5) to the water inlet (11), and the lower end of the water retaining rib (14) is arranged close to the inner bottom wall of the water return area (21).

11. The cleaning machine according to claim 9, characterized in that: The water return area (21) is a triangular structure with a smooth transition at the corners, comprising a first straight side (211), a second straight side (212), and a third straight side (213) connected end to end, and the straight sides are smoothly connected through arc segments at the intersection.

12. The cleaning machine according to claim 9, characterized in that: The water return area (21) is arranged in the center of the bottom of the box body (2), the water pump is offset relative to the center of the bottom wall of the box body (2), and the offset water outlet of the water pump is arranged corresponding to the central part of the bottom of the box body (2).

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