Cleaning machine

Abstract

The utility model relates to a cleaning machine which comprises a water cup and a water pump, the water cup is provided with a concave water return area, the water pump is arranged in the water return area, a pump shell of the water pump comprises an upper pump shell and a lower pump shell which are vertically spliced, and a limiting structure capable of preventing the lower pump shell from transversely moving is arranged in the water return area. And the upper pump shell is buckled on the lower pump shell and is locked in the water return area through a locking structure. According to the water pump, the upper pump shell and the lower pump shell which are spliced up and down are adopted, when the water pump is installed, the lower pump shell is pre-positioned in a water return area through the limiting structure, at the moment, only the lower pump shell is prevented from transversely moving, the lower pump shell does not need to be restrained in the up-down direction, and then the upper pump shell is buckled on the lower pump shell, so that the upper pump shell and the lower pump shell are fixed. The upper pump shell is locked in the water return area, the upper pump shell and the lower pump shell are locked into a whole through the locking force of the upper pump shell, the accuracy of the installation position of the water pump in the water return area is improved through the structure, and assembling is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to a washing machine used for washing 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. "An assembly structure of an open water pump and a cleaning machine" (application number: CN202211219551.8) with 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. Affected by the volume of the water return area of ​​the water cup, the diameter and height of the screws and threaded holes are very small. When fixing the water pump in the water cup, it is difficult to align the threaded holes, resulting in high difficulty and inconvenience in installing the water pump. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a cleaning machine which can pre-position the bottom of a water pump and then accurately lock it so as to facilitate installation in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A cleaning machine comprises a water cup and a water pump, wherein the water cup is provided with a concave water return area, the water pump is arranged in the water return area, the pump housing of the water pump comprises an upper pump housing and a lower pump housing spliced ​​together, the water return area is provided with a limiting structure capable of preventing the lower pump housing from lateral movement, the upper pump housing is buckled on the lower pump housing and locked in the water return area by a locking structure.

[0007] Preferably, a first plug-in structure is provided in the water return area, and correspondingly, a second plug-in structure is provided in the lower pump housing, and the second plug-in structure and the first plug-in structure are plug-in limited in the upper and lower directions, and the first plug-in structure and the second plug-in structure together constitute the limiting structure. The lower pump housing is limited by the plug-in limiting structure, and only the lateral movement of the lower pump housing is prevented, without the need to constrain the lower pump housing in the upper and lower directions, so as to facilitate the disassembly and assembly of the water pump; after the lower pump housing is buckled with the upper pump housing, the upper and lower directions can be constrained through the locking relationship between the upper pump housing and the water return area, which is not only convenient for assembly, but also convenient for assembling the impeller into the pump housing.

[0008] Preferably, the bottom wall of the water return area is provided with a first limiting column extending upward, and correspondingly, the bottom wall of the lower pump housing is provided with a second limiting column extending downward, and the second limiting column is plugged and limited with the first limiting column. The second limiting column is provided with a limiting hole for the first limiting column to be plugged in. The above structure constitutes a part of the plug-in limiting structure, which facilitates the pre-positioning of the lower pump housing.

[0009] Preferably, the main body of the pump housing is disc-shaped, the inner side wall of the water return area forms a curved surface matching the outer side wall of the pump housing, and at least two groups of the first limiting columns are arranged close to the curved surface and distributed at intervals along the curved track of the curved surface. The above structure can roughly guide the installation direction of the pump housing through the curved surface structure of the water return area, and the first limiting columns distributed along the curved track of the curved surface can improve the constraint effect on various parts of the pump housing.

[0010] Preferably, from a top view, the water return area is a triangular structure with rounded corners, and each corner of the triangular structure and its adjacent straight side parts respectively enclose a first installation area, a second installation area, and a third installation area. The water pump is arranged in the first installation area and partially extends to the central part of the triangular structure and is provided with a water outlet. The water return area of ​​the existing washing machine is generally semicircular in shape. Considering that the spray arm needs to be arranged in the center relative to the box body to better cover the tableware cleaning range, the water return area needs to be offset on the bottom wall of the box body, and the slag collection basket located next to the spray arm is also offset on the bottom wall of the box body. In the water return process, the ideal effect is that the return water enters the water return area after filtering the residue through the slag collection basket, and then is further drawn into the spray arm through the water suction port of the open water pump located in the water return area. However, since the offset distance of the slag collection basket relative to the bottom wall of the box body is too large, the return water enters the water return area before it flows to the slag collection basket, resulting in poor slag collection effect and the problem of residue retention 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.

[0011] Preferably, a first boss is provided at the junction of the first installation area, the second installation area and the third installation area, and at least one first limiting column is provided on the first boss. The first limiting column is provided in the central part of the triangular area to constrain the pump housing there, which is conducive to improving the installation stability of the pump housing.

[0012] Preferably, the depths of the second installation area, the first installation area, and the third installation area increase in sequence, the second installation area is used to install the heating element, the third installation area is used to install the slag collection basket, and a transition-connected guide slope is formed between the second installation area and the first installation area and the third installation area, and the first boss extends from the guide slope to the bottom of the pump casing. With the above structure, the water suction direction of the water pump can also be diverted by the first boss, that is, the water flow from the second installation area and the third installation area is diverted to improve the water suction efficiency.

[0013] Preferably, a water inlet is provided at the bottom of the water pump, and a flow channel spirally extending toward the central part of the triangular structure is provided on the side of the water pump, the end of the flow channel is bent upward and the upper end forms the water outlet.

[0014] Preferably, the side of the lower pump housing is provided with an outwardly extending water outlet pipe, and correspondingly, the side wall of the return water area is provided with a water outlet connected to the water outlet end of the water outlet pipe. The water pump of the utility model can supply water with two outlets, one water outlet is located in the central part of the return water area to supply water to the bottom spray arm, and the other water outlet is transported upward through the water outlet pipe and the water guide pipe provided outside the water cup to supply water to the top spray arm, thereby expanding the spray area and improving the cleaning effect.

[0015] Preferably, the side wall of the water return area is provided with a slot arranged around the periphery of the water outlet, and correspondingly, the outlet end of the water outlet pipe is provided with an assembly ring that can be inserted into the slot from top to bottom. The above structure constitutes another part of the plug-in limiting structure, which facilitates the pre-positioning of the lower pump housing.

[0016] Preferably, in the assembled state, the water outlet port of the water outlet pipe is butted against the water outlet, and the outer end surface of the water outlet pipe is sealed against the side wall of the water return area in the slot by a sealing ring. The above structure can also realize the sealing installation between the water outlet pipe and the water return area.

[0017] Preferably, at least one second boss arranged near the edge of the water pump is provided on the side wall of the water return area, a threaded column is provided on the second boss, and an assembly edge extending outward is provided on the edge of the upper pump shell, and threaded holes corresponding to the threaded columns are opened on the assembly edge, and screws pass through the threaded holes and threaded columns to lock the upper pump shell in the water return area and buckle the upper pump shell and the lower pump shell into a whole. The second boss and threaded column can limit and lock the assembly edge of the upper pump shell to achieve the locking of the upper pump shell. At the same time, after the upper pump shell is locked in the water return area, the downward locking force of the upper pump shell is used to achieve the buckling seal between the upper pump shell and the lower pump shell, so as to achieve the assembly of the pump shell as a whole, which is convenient to operate.

[0018] Preferably, there are two second bosses arranged at intervals at the bottom edge of the pump housing. This structure can improve the uniformity of the supporting force on the pump housing, thereby improving the assembly reliability of the pump housing.

[0019] Preferably, a buckle structure capable of binding the upper pump shell and the lower pump shell together is provided at the edges of the upper pump shell and the lower pump shell, which is conducive to improving the reliability of assembly between the upper pump shell and the lower pump shell.

[0020] Preferably, the water pump further comprises an impeller and a driving member, wherein the impeller is a centrifugal impeller rotatably disposed in the pump casing, and the driving member is disposed under the water cup, and the output shaft passes through the bottom wall of the water cup and extends into the pump casing to be connected with the impeller.

[0021] Compared with the prior art, the advantages of the utility model are: the water pump of the utility model adopts an upper pump casing and a lower pump casing structure spliced ​​together. During installation, the lower pump casing is first pre-positioned in the return water area by a limiting structure. At this time, it is only necessary to prevent the lower pump casing from moving laterally without constraining the lower pump casing in the up and down directions. After the upper pump casing is buckled on the lower pump casing, the upper pump casing is locked in the return water area, and the locking force of the upper pump casing is used to lock the upper pump casing and the lower pump casing as a whole. The above structure improves the accuracy of the installation position of the water pump in the return water area and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a partial structural schematic diagram of an embodiment of the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the bottom structure;

[0024] Figure 3 for Figure 1 Exploded diagram of . DETAILED DESCRIPTION

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

[0026] like Figures 1 to 3 As shown, the cleaning machine of this embodiment includes a water cup 2 and a water pump 3. The water cup 2 is provided with a concave return water area 21. The water pump 3 is arranged in the return water area 21. The pump shell of the water pump 3 includes an upper pump shell 311 and a lower pump shell 312 spliced ​​together. A limiting structure that can prevent the lower pump shell from moving laterally is provided in the return water area 21. The upper pump shell 311 is buckled on the lower pump shell 312 and locked in the return water area 21 through a locking structure.

[0027] A first plug-in structure is provided in the return water area 21, and correspondingly, a second plug-in structure is provided in the lower pump housing 312, and the second plug-in structure and the first plug-in structure are plug-in limited in the upper and lower directions, and the first plug-in structure and the second plug-in structure together constitute a limiting structure. The lower pump housing 312 is limited by the plug-in limiting structure, and only the lower pump housing 312 is prevented from moving laterally, without the need to constrain the lower pump housing 312 in the upper and lower directions, so as to facilitate the disassembly and assembly of the water pump 3; the lower pump housing 312 can be restrained in the upper and lower directions through the locking relationship between the upper pump housing 311 and the return water area 21 after being buckled with the upper pump housing 311, which is not only convenient for assembly, but also convenient for assembling the impeller into the pump housing.

[0028] The bottom wall of the water return area 21 is provided with a first limiting column 211 extending upward, and correspondingly, the bottom wall of the lower pump housing 312 is provided with a second limiting column 3121 extending downward, and the second limiting column 3121 is plugged and limited with the first limiting column 211. The second limiting column 3121 is provided with a limiting hole 3122 for the first limiting column 211 to be plugged therein. The above structure constitutes a part of the plug-in limiting structure, which facilitates the pre-positioning of the lower pump housing 312.

[0029] The main part of the pump housing is disc-shaped, the inner side wall of the water return area 21 forms a curved surface 212 matching the outer side wall of the pump housing, and three groups of first limiting columns 211 are arranged close to the curved surface 212 and distributed at intervals along the curved track of the curved surface 212. The above structure can roughly guide the installation direction of the pump housing through the curved surface 212 structure of the water return area 21, and the first limiting columns 211 distributed along the curved track of the curved surface 212 can improve the restraining effect on various parts of the pump housing.

[0030] From a top view, the water return area 21 is a triangular structure with rounded corners. Each corner of the triangular structure and its adjacent straight side parts enclose the first installation area 10, the second installation area 20, and the third installation area 30. The water pump 3 is arranged in the first installation area 10 and partially extends to the central part of the triangular structure and is provided with a water outlet 31. 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 bottom of the water pump 3 is provided with a water inlet 32, and the side of the water pump 3 is provided with a flow channel 33 that spirally extends toward the central part of the triangular structure. The end of the flow channel 33 is bent upward and the upper end forms a water outlet 31.

[0031] A first boss 101 is provided at the junction of the first installation area 10, the second installation area 20, and the third installation area 30, and a first limiting column 211 is provided on the first boss 101. The first limiting column 211 is provided in the central part of the triangular area to constrain the pump casing at this location, which is beneficial to improving the installation stability of the pump casing. The depths of the second installation area 20, the first installation area 10, and the third installation area 30 increase successively, and a guide slope 100 is formed between the second installation area 20 and the first installation area 10 and the third installation area 30 to form a transition connection, and the first boss 101 extends from the guide slope 100 to the bottom of the pump casing. With the above structure, the water suction direction of the water pump 3 can also be diverted by the first boss 101, that is, the incoming water flow from the second installation area 20 and the third installation area 30 is diverted to improve the water suction efficiency.

[0032] The side of the lower pump housing 312 is provided with an outwardly extending water outlet pipe 34, and correspondingly, a water outlet 213 is provided on the side wall of the water return area 21 to be connected to the water outlet end of the water outlet pipe 34. The water pump 3 of this embodiment can supply water with two outlets, one water outlet 31 is located in the central part of the water return area 21 to supply water to the bottom spray arm, and the other water outlet is transported upward through the water outlet pipe 34 and the water guide pipe provided outside the water cup 2 to supply water to the top spray arm, thereby expanding the spraying area and improving the cleaning effect.

[0033] The side wall of the return water area 21 is provided with a slot 214 arranged around the periphery of the water outlet 213, and correspondingly, the water outlet end of the water outlet pipe 34 is provided with an assembly ring 341 that can be inserted into the slot 214 from top to bottom. The above structure constitutes another part of the plug-in limiting structure, which is convenient for pre-positioning the lower pump housing 312. In the assembled state, the water outlet port of the water outlet pipe 34 is docked with the water outlet 213, and the outer end surface of the water outlet pipe 34 and the side wall of the return water area 21 in the slot 214 are sealed by a sealing ring. The above structure can also realize the sealed installation between the water outlet pipe 34 and the return water area 21.

[0034] A second boss 215 arranged near the edge of the water pump 3 is provided at the side wall of the water return area 21, and a threaded column 216 is provided on the second boss 215. An assembly edge 3111 extending outward is provided at the edge of the upper pump shell 311, and a threaded hole 3112 corresponding to the threaded column 216 is opened on the assembly edge 3111. The screw passes through the threaded hole 3112 and the threaded column 216 to lock the upper pump shell 311 in the water return area 21 and buckle the upper pump shell 311 and the lower pump shell 312 into a whole. The second boss 215 and the threaded column 216 can limit and lock the assembly edge 3111 of the upper pump shell 311 to achieve the locking of the upper pump shell 311. At the same time, after the upper pump shell 311 is locked in the water return area 21, the buckling seal between the upper pump shell 311 and the lower pump shell 312 is achieved by using the downward locking force of the upper pump shell 311, so as to achieve the assembly of the pump shell as a whole, which is convenient to operate.

[0035] There are two second bosses 215 arranged at intervals at the bottom edge of the pump housing. This structure can improve the uniformity of the support force on the pump housing to improve the assembly reliability of the pump housing. In addition to the threaded column 216 provided on the second boss 215, the threaded column 216 can also be provided on the guide slope 100.

[0036] The edges of the upper pump housing 311 and the lower pump housing 312 are provided with a snap-fit ​​structure 200 that can bind the two together. This structure is conducive to improving the reliability of the assembly between the upper pump housing 311 and the lower pump housing 312.

[0037] The water pump 3 also includes an impeller 35 and a driving member 36. The impeller 35 is a centrifugal impeller rotatably arranged in the pump housing. The driving member 36 is a motor, which is arranged under the water cup 2 and has an output shaft that passes through the bottom wall of the water cup 2 and extends into the pump housing to be connected with the impeller 35.

[0038] The water pump 3 of the present embodiment adopts an upper pump casing 311 and a lower pump casing 312 structure spliced ​​together from top to bottom. During installation, the lower pump casing 312 is first pre-positioned in the return water area 21 by means of a limiting structure. At this time, it is only necessary to prevent the lower pump casing 312 from moving laterally without constraining the lower pump casing 312 in the up and down directions. After the upper pump casing 311 is snapped onto the lower pump casing 312, the upper pump casing 311 is screwed in the return water area 21. The locking force of the upper pump casing 311 is used to lock the upper pump casing 311 and the lower pump casing 312 into a whole. The above structure improves the accuracy of the installation position of the water pump 3 in the return water area 21 and facilitates assembly.

[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 cleaning machine, comprising a water cup (2) and a water pump (3), wherein the water cup (2) is provided with a concave water return area (21), and the water pump (3) is arranged in the water return area (21), characterized in that: The pump casing of the water pump (3) comprises an upper pump casing (311) and a lower pump casing (312) which are spliced ​​together. A limiting structure capable of preventing the lower pump casing (312) from lateral movement is provided in the return water area (21). The upper pump casing (311) is buckled onto the lower pump casing (312) and is locked in the return water area (21) by a locking structure.

2. The cleaning machine according to claim 1, characterized in that: The water return area (21) is provided with a first plug-in structure, and correspondingly, the lower pump housing (312) is provided with a second plug-in structure, the second plug-in structure and the first plug-in structure are plugged in and limited in position up and down, and the first plug-in structure and the second plug-in structure together constitute the limiting structure.

3. The cleaning machine according to claim 2, characterized in that: The bottom wall of the water return area (21) is provided with a first limiting column (211) extending upward, and correspondingly, the bottom wall of the lower pump housing (312) is provided with a second limiting column (3121) extending downward, and the second limiting column (3121) is plugged and limited with the first limiting column (211).

4. The cleaning machine according to claim 3, characterized in that: The second limiting column (3121) is provided with a limiting hole (3122) for the first limiting column (211) to be inserted therein.

5. The cleaning machine according to claim 3, characterized in that: The main body of the pump casing is disc-shaped, the inner wall of the water return area (21) forms a curved surface (212) matching the outer wall of the pump casing, and at least two groups of the first limiting columns (211) are arranged close to the curved surface (212) and are spaced apart along the curved trajectory of the curved surface (212).

6. The cleaning machine according to claim 3, characterized in that: When viewed from a top view, the water return area (21) is a triangular structure with rounded corners, and each corner of the triangular structure and its adjacent straight side portions respectively enclose a first installation area (10), a second installation area (20), and a third installation area (30). The water pump (3) is arranged in the first installation area (10) and partially extends to the central part of the triangular structure and is provided with a water outlet (31).

7. The cleaning machine according to claim 6, characterized in that: A first boss (101) is provided at the connection between the first installation area (10), the second installation area (20) and the third installation area (30), and at least one first limiting column (211) is provided on the first boss (101).

8. The cleaning machine according to claim 7, characterized in that: The depths of the second installation area (20), the first installation area (10), and the third installation area (30) increase sequentially; 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 collecting basket (4); a flow guiding inclined surface (100) is formed as a transition connection between the second installation area (20) and the first installation area (10) and the third installation area (30); and the first boss (101) extends from the flow guiding inclined surface (100) to the bottom of the pump casing.

9. The cleaning machine according to claim 6, characterized in that: The bottom of the water pump (3) is provided with a water inlet (32), and the side of the water pump (3) is provided with a flow channel (33) spirally extending toward the central part of the triangular structure, the end of the flow channel (33) is bent upward and the upper end forms the water outlet (31).

10. The cleaning machine according to any one of claims 2 to 9, characterized in that: The side of the lower pump housing (312) is provided with a water outlet pipe (34) extending outward, and correspondingly, the side wall of the return water area (21) is provided with a water outlet (213) connected to the water outlet end of the water outlet pipe (34).

11. The cleaning machine according to claim 10, characterized in that: A slot (214) arranged around the periphery of the water outlet (213) is provided on the side wall of the water return area (21), and correspondingly, an assembly ring (341) capable of being inserted into the slot (214) from top to bottom is provided at the water outlet end of the water outlet pipe (34).

12. The cleaning machine according to claim 11, characterized in that: In the assembled state, the water outlet port of the water outlet pipe (34) is butted against the water outlet (213), and the outer end surface of the water outlet pipe (34) and the side wall of the water return area (21) in the slot (214) are sealed via a sealing ring.

13. The cleaning machine according to any one of claims 1 to 9, characterized in that: At least one second boss (215) is arranged on the side wall of the return water area (21) and is arranged close to the edge of the water pump (3). A threaded column (216) is arranged on the second boss (215). The edge of the upper pump housing (311) is provided with an outwardly extending assembly edge (3111). The assembly edge (3111) is provided with a threaded hole (3112) arranged corresponding to the threaded column (216). Screws pass through the threaded hole (3112) and the threaded column (216) to lock the upper pump housing in the return water area (21) and buckle the upper pump housing (311) and the lower pump housing (312) into a whole.

14. The cleaning machine according to claim 13, characterized in that: There are two second bosses (215) arranged at intervals at the bottom edge of the pump housing.

15. The cleaning machine according to any one of claims 1 to 9, characterized in that: A buckle structure (200) capable of binding the upper pump shell (311) and the lower pump shell (312) together is provided at the edges of the upper pump shell (311) and the lower pump shell (312).

16. The cleaning machine according to any one of claims 1 to 9, characterized in that: The water pump (3) further comprises an impeller (35) and a driving member (36); the impeller (35) is a centrifugal impeller rotatably arranged in a pump casing; the driving member (36) is arranged below the water cup (2); and the output shaft passes through the bottom wall of the water cup (2) and extends into the pump casing to be connected with the impeller (35).

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