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 water pump comprises a pump shell, the pump shell comprises a first pump shell and a second pump shell, the first pump shell and the second pump shell are sealed at the joint through a sealing ring, and the sealing ring forms a bending structure at the joint of a water outlet flow channel and a pump cavity. The pump shell is provided with a partition tongue separating the pump cavity from the water outlet flow channel, the bent structure is located on the partition tongue and arranged close to the outer side of the partition tongue, and a sealing structure extending from the bent structure to the inner end of the partition tongue is further arranged between the first pump shell and the second pump shell. The first pump shell and the second pump shell which can be spliced with each other are adopted, so that the impeller can be conveniently mounted in the pump shell; the partition tongue at the joint of the pump cavity and the water outlet flow channel is sealed through the sealing structure, so that internal and external pressure movement of the partition tongue is prevented, deformation of the partition tongue in a high-temperature environment can be prevented, and on the basis of improving the sealing performance and avoiding water leakage, good water drawing performance is kept, and the water pumping efficiency is 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. 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, and the open water pump is fixed to the bottom of the water cup by screws. For an open water pump, it is directly located in the return water area, which can provide a large water drawing power and water pressure. The water pressure in the water pump is very high, which puts high demands on the sealing of the pump housing. In order to meet the sealing requirements, the existing water pump usually installs the impeller into the pump housing and fixes the upper and lower pump housings by welding and other methods. However, since the open water pump is fixed in the concave return water area at the bottom of the cleaning machine, it is difficult to install the water pump; if the upper and lower housings of the water pump are installed detachably, water leakage is likely to occur at the joint, affecting the pumping efficiency of the water pump. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a water pump for a cleaning machine which is easy to assemble and has good sealing performance after assembly, thereby improving the water pumping efficiency, 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, wherein a water inlet is provided at the bottom of the pump casing, and a water outlet channel extending spirally outward along the circumferential direction is provided on the side. The pump casing comprises a first pump casing and a second pump casing which can be spliced ​​together to enclose a pump chamber and a water outlet channel. The first pump casing and the second pump casing form a seal at the splicing point through a sealing ring, and the sealing ring forms a bending structure at the connection between the water outlet channel and the pump chamber. The pump casing is provided with a partition tongue separating the pump chamber from the water outlet channel, and the bending structure is located on the partition tongue and arranged close to the outer side of the partition tongue. A sealing structure extending from the bending structure to the inner end of the partition tongue is also provided between the first pump casing and the second pump casing.

[0008] Preferably, the first pump housing has a slot formed at the edge facing the second pump housing, the sealing ring is arranged in the slot, and the second pump housing has a plug-in portion formed at the edge facing the first pump housing that can be inserted into the slot and seal with the sealing ring.

[0009] Preferably, the cross section of the sealing ring is a U-shaped structure, and the bending structure extends into the partition tongue to form a sealing groove intersecting the U-shaped structure. Correspondingly, the plug-in portion is provided with an inserting edge extending into the partition tongue and plugged into the sealing groove at the corresponding bending structure. The pump chamber inside the partition tongue is a low-pressure area, and the water outlet flow channel outside the partition tongue is a high-pressure area. The internal and external pressure difference at the partition tongue is large. If targeted sealing is not adopted, pressure release is likely to occur and affect the water pumping effect. The utility model is provided with a sealing structure formed as a whole with the outer sealing ring at the partition tongue, which can avoid pressure release at the partition tongue.

[0010] Preferably, the cross section of the sealing ring is a U-shaped structure. In the assembled state, the plug-in portion is inserted into the U-shaped structure and encloses a sealing cavity at least at the lower part of the U-shaped structure.

[0011] Preferably, a convex rib that can be elastically squeezed with the plug-in portion is convexly provided on the inner side wall of the U-shaped structure, and the convex rib and the inner wall of the U-shaped structure below it together enclose a sealed cavity that surrounds the lower part of the plug-in portion. The above structure encloses a sealed cavity at the lower part of the plug-in portion, and after water seeps into the sealed cavity, it is filled in the sealed cavity to form a seal, further preventing water from overflowing and improving the sealing performance.

[0012] Preferably, the inner side wall corresponding to the first vertical part of the U-shaped structure is provided with a first convex rib that can be elastically pressed against the inner side wall of the plug-in part, and the inner side wall corresponding to the second vertical part of the U-shaped structure is provided with a second convex rib that can be elastically pressurized against the outer side wall of the plug-in part. Providing convex ribs on the inner and outer sides of the plug-in part is conducive to double water isolation and improved sealing.

[0013] Preferably, the first convex ribs and the second convex ribs are arranged alternately up and down. This structure facilitates the demoulding of the mold during the injection molding of the sealing ring, and forms seals at different heights respectively, further improving the sealing performance.

[0014] Preferably, the height of the first convex rib is lower than that of the second convex rib. This structure facilitates the demoulding of the mold during the injection molding of the sealing ring, and forms seals at different heights, which is conducive to improving the sealing performance; at the same time, since the pressure at the assembly gap is high inside and low outside, the structure with the first convex rib being low and the second convex rib being high adapts to the pressure state, which is conducive to further improving the sealing performance.

[0015] Preferably, a snap-fit ​​structure capable of detachably restraining the first pump housing and the second pump housing is further provided at the edges of the first pump housing and the second pump housing.

[0016] The water pump of the utility model further comprises an impeller and a driving member. The impeller is rotatably arranged in the pump casing. The driving member is arranged below the pump casing and the output shaft passes through the bottom of the pump casing upwardly and is connected to the impeller in the pump casing.

[0017] 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 bottom wall of the first pump shell is provided with a water inlet connected to the water return area, and a spray arm connected to the water outlet channel is arranged in the box body.

[0018] Compared with the prior art, the advantages of the utility model are: the utility model adopts a first pump casing and a second pump casing structure that can be spliced ​​with each other, which is convenient for installing the impeller in the pump casing; the joint between the first pump casing and the second pump casing is sealed by a sealing ring, and the partition tongue at the connection between the pump chamber and the water outlet channel is also sealed by a sealing structure, thereby preventing the internal and external pressures of the partition tongue from fluctuating, and on the other hand, it can also prevent the partition tongue from deforming in a high temperature environment, thereby maintaining good water-drawing performance and improving water pumping efficiency on the basis of improving sealing and avoiding water leakage. 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 Exploded diagram of

[0021] Figure 3 This is a schematic diagram of the structure of the water pump according to the embodiment of the utility model, in which the second pump casing is hidden;

[0022] Figure 4 This is a schematic diagram of the structure of the second pump casing of the embodiment of the utility model;

[0023] Figure 5 This is an assembly sealing diagram of the first pump housing and the second pump housing of the embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of the structure of a cleaning machine according to an 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] The water pump used for the cleaning machine in this embodiment is an open water pump, that is, the pump casing is arranged in the return water area of ​​the cleaning machine, and the pump casing and the return water area are directly connected without the need for pipe water conduction, which is beneficial to reducing fluid energy loss and increasing water pressure.

[0027] like Figures 1 to 6 As shown, the water pump 3 of this embodiment includes a pump housing 31, a water inlet 3110 is provided at the bottom of the pump housing 31, and a water outlet channel 35 is provided on the side which extends spirally outward along the circumferential direction. The outer end of the water outlet channel 35 extends upward to form a water outlet 351 offset relative to the center of the pump housing 31.

[0028] The pump housing 31 includes a first pump housing 311 and a second pump housing 312 which can be spliced ​​together to enclose a pump chamber 310 and a water outlet channel 35. The first pump housing 311 is formed with a slot 3111 at the edge facing the second pump housing 312, and a sealing ring 313 is embedded in the slot 3111. The second pump housing 312 is formed with a plug-in portion 3121 at the edge facing the first pump housing 311, which can be inserted into the slot 3111 and cooperate with the sealing ring 313 for sealing.

[0029] The cross-section of the sealing ring 313 is a U-shaped structure. When assembled, the plug-in portion 3121 is inserted into the U-shaped structure and encloses a sealing cavity 3100 at least in the lower part of the U-shaped structure. The inner wall of the U-shaped structure is also provided with partition ribs 100 that can cooperate with the plug-in portion 3121 to separate the sealing cavity 3100 into multiple independent sealing sections 10.

[0030] The first pump housing 311 and the second pump housing 312 of this embodiment are assembled up and down. The first pump housing 311 is located at the bottom and the second pump housing 312 is located at the top. The U-shaped structure of the sealing ring 313 is adapted to the structure of the slot 3111. The first vertical part of the U-shaped structure is arranged close to the first inner side wall of the slot 3111, the second vertical part of the U-shaped structure is arranged close to the second inner side wall of the slot 3111, and the lower end surface of the U-shaped structure is arranged close to the inner bottom wall of the slot 3111. This improves the compactness of the assembly and thus improves the sealing performance.

[0031] The inner side wall of the U-shaped structure is provided with a convex rib that can be elastically pressed against the plug-in portion 3121, and the convex rib can further improve the sealing performance. Specifically, the inner side wall corresponding to the first vertical portion of the U-shaped structure is provided with a first convex rib 3133 that can be elastically pressed against the inner side wall of the plug-in portion 3121, and the inner side wall corresponding to the second vertical portion of the U-shaped structure is provided with a second convex rib 3132 that can be elastically pressurized against the outer side wall of the plug-in portion 3121. The convex ribs are provided on the inner and outer sides of the plug-in portion 3121, which is conducive to double blocking of water and improving the sealing performance.

[0032] The first ribs 3133 and the second ribs 3132 are arranged alternately up and down, and the height of the first ribs 3133 is lower than that of the second ribs 3132. The above structure facilitates the mold demolding of the sealing ring 313 during injection molding, and forms seals at different heights, further improving the sealing performance; at the same time, since the pressure at the assembly gap is high inside and low outside, the structure with the first ribs 3133 being low and the second ribs 3132 being high is adapted to the pressure state, which is conducive to further improving the sealing performance.

[0033] The first convex rib 3133, the second convex rib 3132 and the inner wall of the U-shaped structure below together enclose a sealed cavity 3100 that surrounds the lower part of the plug-in portion 3121. The structure encloses a sealed cavity 3100 at the lower part of the plug-in portion 3121. After water seeps into the sealed cavity 3100, it is filled in the sealed cavity 3100 to form a seal, further preventing water from overflowing and improving the sealing performance.

[0034] A buckle structure that can detachably restrain the first pump housing 311 and the second pump housing 312 is also provided at the edges of the first pump housing 311 and the second pump housing 312. A locking structure for restraining them in the cleaning machine is provided on the first pump housing 311 and the second pump housing 312. The locking structure is at least one of a screw connection structure and a buckle connection structure.

[0035] The water pump of this embodiment also includes an impeller 32 and a driving member 33. The impeller 32 is a centrifugal impeller rotatably arranged in the pump casing 31. The driving member 33 is a motor, which is arranged under the pump casing 31 and has an output shaft 331 that passes upward through the bottom of the pump casing 31 and is connected to the impeller 32 in the pump casing 31.

[0036] In this embodiment, the sealing ring 313 forms a bending structure 3130 at the junction of the water outlet channel 35 and the pump chamber 310. The pump housing 31 is provided with a partition tongue 314 separating the pump chamber 310 from the water outlet channel 35. The bending structure 3130 is located on the partition tongue 314 and is arranged close to the outer side of the partition tongue 314. A sealing structure extending from the bending structure 3130 to the inner end of the partition tongue 314 is also provided between the first pump housing 311 and the second pump housing 312.

[0037] The bending structure 3130 extends into the partition tongue 314 to form a sealing groove 3131 that intersects with the U-shaped structure of the sealing ring 313. Correspondingly, the plug-in portion 3121 is provided with an inserting edge 3122 that extends into the partition tongue 314 and is plugged into the sealing groove 3131 at the corresponding bending structure 3130. The sealing groove 3131 and the inserting edge 3122 together constitute a sealing structure. The pump chamber 310 inside the partition tongue 314 is a low-pressure area, and the water outlet channel 35 outside the partition tongue 314 is a high-pressure area. The internal and external pressure difference at the partition tongue 314 is very large. If targeted sealing is not adopted, pressure release is likely to occur and affect the water pumping effect. In this embodiment, a sealing structure that is formed as a whole with the outer sealing ring 313 is provided at the partition tongue 314 to avoid pressure release at the partition tongue 314.

[0038] The cleaning machine of this embodiment includes a housing 1, a concave water return area 11 is provided at the bottom of the housing 1, the water pump 3 is provided in the water return area 11, a water inlet 3110 connected to the water return area 11 is provided at the bottom of the water pump 3, and the top water outlet 351 of the water outlet channel 35 is connected to the spray arm. A slag collecting basket 4 and a heating element 5 are also provided in the water return area 11. From a top view, the water pump 3, the slag collecting basket 4 and the heating element 5 are arranged in a herringbone structure, and the side wall of the water return area 11 is surrounded by the periphery of the herringbone structure to form a triangular structure, wherein the water outlet 351 of the water pump 3 extends to the central part of the herringbone structure through the water outlet channel 35. The water return area 11 is arranged in the center of the bottom of the washing chamber of the cleaning machine, the water pump 3 is offset relative to the center of the bottom wall of the washing chamber, and the water outlet 351 of the water pump 3 is arranged corresponding to the central part of the bottom of the washing chamber. The side of the water pump 3 is provided with a water outlet channel 35 extending spirally toward the central part of the triangular structure, and the end of the water outlet channel 35 forms the above-mentioned water outlet 351. The spirally extending water outlet channel 35 pressurizes the return water on the one hand, and on the other hand, extends the water outlet 351 to the center of the triangular structure in the process of throwing out the return water, so that when the water pump 3 is offset relative to the bottom of the cleaning machine, the water outlet 351 is arranged in the center relative to the bottom of the cleaning machine, meeting the requirement of arranging the bottom spray arm in the center.

[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, comprising a pump housing (31), wherein the pump housing (31) is provided with a water inlet (3110) at the bottom, and a water outlet channel (35) extending outwardly in a spiral along the circumferential direction is provided on the side, characterized in that: The pump housing (31) comprises a first pump housing (311) and a second pump housing (312) which can be spliced ​​together to enclose a pump chamber (310) and a water outlet channel. The first pump housing (311) and the second pump housing (312) are sealed at the splicing point by a sealing ring (313). The sealing ring (313) forms a bending structure (3130) at the connection point between the water outlet channel (35) and the pump chamber (310). The pump housing (31) is provided with a partition tongue (314) for separating the pump chamber (310) from the water outlet channel (35). The bending structure (3130) is located on the partition tongue (314) and arranged close to the outer side of the partition tongue (314). A sealing structure extending from the bending structure (3130) to the inner end of the partition tongue (314) is also provided between the first pump housing (311) and the second pump housing (312).

2. The water pump for a cleaning machine according to claim 1, characterized in that: The first pump housing (311) is formed with a slot (3111) at the edge facing the second pump housing (312), and a sealing ring (313) is embedded in the slot (3111); the second pump housing (312) is formed with a plug-in portion (3121) at the edge facing the first pump housing (311) that can be inserted into the slot (3111) and cooperate with the sealing ring (313) for sealing.

3. The water pump for a cleaning machine according to claim 2, characterized in that: The cross-section of the sealing ring (313) is a U-shaped structure, and the bending structure (3130) extends into the partition tongue (314) to form a sealing groove (3131) that is connected to the U-shaped structure. Correspondingly, the plug-in portion (3121) is provided with an inserting edge (3122) extending into the partition tongue (314) and plugging into the sealing groove (3131) at the corresponding bending structure (3130).

4. The water pump for a cleaning machine according to claim 3, characterized in that: In the assembled state, the plug-in portion (3121) is inserted into the U-shaped structure and encloses a sealed cavity (3100) at least in the lower portion of the U-shaped structure.

5. The water pump for a cleaning machine according to claim 4, characterized in that: A convex rib that can be elastically pressed against the plug-in portion (3121) is provided on the inner side wall of the U-shaped structure, and the convex rib and the inner wall of the U-shaped structure therebelow together form a sealed cavity (3100) that surrounds the lower portion of the plug-in portion (3121).

6. The water pump for a cleaning machine according to claim 5, characterized in that: The inner side wall corresponding to the first vertical part of the U-shaped structure is provided with a first convex rib (3133) that can be elastically squeezed with the inner side wall of the plug-in part (3121), and the inner side wall corresponding to the second vertical part of the U-shaped structure is provided with a second convex rib (3132) that can be elastically pressurized with the outer side wall of the plug-in part (3121).

7. The water pump for a cleaning machine according to claim 6, characterized in that: The first convex ribs (3133) and the second convex ribs (3132) are arranged alternately up and down.

8. The water pump for a cleaning machine according to any one of claims 1 to 7, characterized in that: A buckle structure is also provided at the edges of the first pump housing and the second pump housing, which can detachably restrain the two together.

9. The water pump for a cleaning machine according to any one of claims 1 to 7, characterized in that: The pump also comprises an impeller (32) and a driving member (33), wherein the impeller (32) is rotatably arranged in the pump casing (31), the driving member (33) is arranged below the pump casing (31), and the output shaft (331) passes upward through the bottom of the pump casing (31) and is connected to the impeller (32) in the pump casing (31).

10. A cleaning machine, comprising a housing (1), wherein a concave water return area (11) is provided at the bottom of the housing (1), characterized in that: It also includes a water pump according to any one of claims 1 to 9, which is arranged in the return water area (11), the bottom wall of the first pump housing (311) is provided with a water inlet (3110) connected to the return water area (11), and the box body (1) is provided with a spray arm connected to the water outlet channel (35).

Images