Cleaning machine

Abstract

The utility model relates to a cleaning machine which comprises a box body, a concave water return area is arranged at the bottom of the box body, an inner water pipe is arranged on the inner wall of the box body, the lower end of the inner water pipe is communicated with the water return area, the inner water pipe is used for conveying water flow to the upper portion of the box body, and a back spraying arm communicated with the inner water pipe is arranged on the inner side wall of the box body. The auxiliary nozzle is arranged on the front side of the back spraying arm, a water guide opening and a water outlet sleeve extending forwards along the water guide opening are arranged on the front side of the back spraying arm, and the auxiliary nozzle comprises a jet pipe extending forwards and backwards and a scattering impeller rotationally restrained at the front end of the jet pipe; the rear end of the jet pipe is detachably connected to the water outlet sleeve, and the scattering impeller is used for scattering water flow emitted by the jet pipe in multiple directions. The auxiliary nozzles are arranged on the back spraying arm, and outgoing water of the jet pipe can be scattered in all directions through the scattering impeller, so that the spraying range is expanded, the spraying effect is improved, and the problem that residues are hung on the wall is effectively solved.

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] For desktop and cabinet dishwashers, since the washing space is large, in order to achieve a better washing effect, they are generally designed with three spray arms: top, middle and lower. When working, the washing pump transports water to the top, middle and lower spray arms through pipes. The water is sprayed out from the top, middle and lower spray arms and rinses the dishes before falling back into the water cup at the bottom of the dishwasher. The washing pump transports the fallen water to the top, middle and lower spray arms again to complete a cycle.

[0003] The applicant's prior patent ZL 202023347953.5 "A water flow system and a cleaning machine using the water flow system" discloses a structure in which a middle spray arm is arranged above the side of the bottom spray arm to spray a lateral water column to the upper area of ​​the bottom spray arm. This structure can assist the bottom spray arm and improve the spraying effect on the lower dish rack to a certain extent.

[0004] However, due to the fixed position of the spray hole on the above-mentioned middle spray arm, its spray range is small, which limits its auxiliary spray effect; at the same time, there may be a problem of residue hanging on the side wall of the existing washing chamber, affecting the cleaning effect and user experience. In order to solve the above, the applicant's prior patent ZL 202221124462.0 "Back spray arm and cleaning machine for cleaning machine" added an auxiliary spray nozzle on the basis of the original structure, but because the nozzle is constrained to the main body of the back spray arm by a snap-on structure, if the auxiliary nozzle is blocked, it is difficult to repair or maintain it. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a cleaning machine which can expand the spraying range to improve the spraying effect, effectively eliminate the problem of residue hanging on the wall, and facilitate disassembly and assembly for subsequent repair or maintenance in view of the current status of the prior art.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A cleaning machine comprises a box body, a concave water return area is provided at the bottom of the box body, an inner water pipe is provided on the inner wall of the box body, the lower end of which is connected to the water return area and is used to transport water to the upper part of the box body, a back spray arm is provided on the inner side wall of the box body and is connected to the inner water pipe, and also comprises an auxiliary nozzle arranged on the front side of the back spray arm, a water guide port and a water outlet sleeve extending forward along the water guide port are provided on the front side of the back spray arm, the auxiliary nozzle comprises a jet tube extending forward and backward and a scattering impeller rotatably constrained at the front end of the jet tube, the rear end of the jet tube is detachably connected to the water outlet sleeve, and the scattering impeller is used to disperse the outlet water flow of the jet tube in multiple directions.

[0008] Preferably, the side of the jet tube is provided with an extension arm extending forward to the front side of the jet tube, the front end of the extension arm is bent perpendicular to the axial direction of the jet tube to form a connecting arm, and the scattering impeller is located between the front end of the jet tube and the connecting arm and is constrained on the connecting arm. Symmetrically arranged extension arms can be provided on both sides of the jet tube, the connecting arm is connected between the front ends of the two extension arms, and the two extension arms and the connecting arm are integrally formed, which can improve the installation stability of the scattering impeller.

[0009] Preferably, the connecting arm is provided with an assembly hole which is through from front to back and arranged corresponding to the front port of the jet tube, and the central part of the front side of the scattering impeller is provided with a rotating shaft which is rotatably constrained in the assembly hole. This structure facilitates the rotation of the scattering impeller.

[0010] Preferably, the central part of the scattering impeller is arranged corresponding to the front port of the jet tube, and a dispersion cone extending toward the front port of the jet tube is provided at the central part of the rear side of the scattering impeller. The dispersion cone can disperse the outgoing water flow of the jet tube in the circumferential forward direction, so that the jet water flow forms a larger spray range.

[0011] Preferably, a gap is formed between the tip of the dispersion cone and the front port of the jet tube. This structure is conducive to taking into account the jet range of the dispersed water flow in the circumferential direction and the axial direction.

[0012] Preferably, the inner diameter of the jet pipe gradually increases along the water outlet direction, and the tip of the dispersion cone is arranged corresponding to the center of the front end of the jet pipe. This structure is conducive to further improving the water flow dispersion effect and expanding the spray range.

[0013] Preferably, the scattering impeller has a plurality of scattering ports that penetrate front and back and extend radially from the scattering cone to the edge, and the plurality of scattering ports are arranged radially with the scattering cone as the center on the scattering impeller. The plurality of scattering ports can scatter the water flow for a second time, thereby further expanding the spraying range.

[0014] In order to facilitate the installation of the jet tube and the scattering impeller on the back spray arm, the rear end diameter of the jet tube is enlarged to form a connecting sleeve that can match the water outlet sleeve, and the outer peripheral wall of the rear part of the connecting sleeve is provided with an external thread. Correspondingly, the inner wall of the water outlet sleeve is provided with an internal thread. The connecting sleeve is threadedly connected to the water outlet sleeve, and the front diameter of the connecting sleeve is larger than the rear part and a step is formed between the two. In the assembled state, the front end face of the water outlet sleeve abuts against the step, and the outer peripheral wall of the water outlet sleeve is flush with the outer peripheral wall of the front part of the connecting sleeve.

[0015] Preferably, from a top view, the water return area is a triangular structure with a smooth transition at the corners, and each corner and its adjacent straight side portion respectively enclose a first installation area, a second installation area, and a third installation area, the first installation area is used to install a water pump, the second installation area is used to install a heating element, and the third installation area is used to install a slag collection basket. The box body is provided with a bottom spray arm arranged near the top of the water return area, the bottom of the water pump is provided with a water inlet connected to the water return area, the side of the water pump is provided with a flow channel spirally extending toward the central part of the triangular structure, the end of the flow channel extends upward to form a first water outlet port connected to the bottom spray arm, and the side of the water pump is also provided with a second water outlet port connected to the lower end of the inner water pipe. 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.

[0016] Compared with the prior art, the advantages of the utility model are: the utility model is provided with an auxiliary nozzle on the back spray arm, and the outflowing water of the jet pipe can be dispersed in all directions by the scattering impeller, thereby expanding the spraying range, improving the spraying effect, and effectively eliminating the problem of residue hanging on the wall; the auxiliary nozzle of the utility model is detachably connected to the water outlet sleeve of the back spray arm, and the structure of the auxiliary nozzle itself determines that it is not easy to be blocked, and even if it is blocked, it can be removed from the back spray arm for cleaning and maintenance, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial structural schematic diagram of a cleaning machine according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Assembly drawing of the middle back spray arm and auxiliary nozzle;

[0019] Figure 3 for Figure 2 A partial cross-sectional view of

[0020] Figure 4 for Figure 2 A partial exploded view of

[0021] Figure 5 This is an assembly diagram of the components in the water return area of ​​the cleaning machine according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 5 As shown, the cleaning machine of this embodiment includes a box body 1, a concave water return area 11 is provided at the bottom of the box body 1, an inner water pipe 2 is provided on the inner wall of the box body 1, the lower end of which is connected to the water return area 11 and is used to transport water to the upper part of the box body 1, and a back spray arm 3 connected to the inner water pipe 2 is provided on the inner side wall of the box body 1, and also includes an auxiliary nozzle 4 provided on the front side of the back spray arm 3. The back spray arm 3 extends laterally, and a plurality of auxiliary nozzles 4 can be provided and arranged at intervals in the back spray arm 3 in the laterally direction.

[0024] The front side of the back spray arm 3 is provided with a water guide port 31 and a water outlet sleeve 32 extending forward along the water guide port 31. The auxiliary nozzle 4 includes a jet tube 41 extending forward and backward and a scattering impeller 42 rotatably constrained at the front end of the jet tube 41. The rear end of the jet tube 41 is detachably connected to the water outlet sleeve 32. The scattering impeller 42 is used to disperse the outlet water flow of the jet tube 41 in multiple directions.

[0025] Specifically, the side of the jet tube 41 is provided with an extension arm 411 extending forward to the front side of the jet tube 41, the front end of the extension arm 411 is bent perpendicular to the axial direction of the jet tube 41 to form a connecting arm 412, and the scattering impeller 42 is located between the front end of the jet tube 41 and the connecting arm 412 and is constrained on the connecting arm 412. The two sides of the jet tube 41 can be provided with symmetrically arranged extension arms 411, the connecting arm 412 is connected between the front ends of the two extension arms 411, and the two extension arms 411 and the connecting arm 412 are integrally formed, so that the installation stability of the scattering impeller 42 can be improved.

[0026] The connecting arm 412 is provided with an assembly hole 4121 which is through from front to back and arranged corresponding to the front end of the jet tube 41. The central part of the front side of the scattering impeller 42 is provided with a rotating shaft 421 which is rotatably constrained in the assembly hole 4121. This structure facilitates the rotation of the scattering impeller 42.

[0027] The central part of the scattering impeller 42 is arranged corresponding to the front port of the jet tube 41, and a dispersion cone 422 extending toward the front port of the jet tube 41 is provided at the central part of the rear side of the scattering impeller 42. The dispersion cone 422 can disperse the outgoing water flow of the jet tube 41 in the circumferential forward direction, so that the jet water flow forms a larger spray range.

[0028] A gap is formed between the tip of the dispersion cone 422 and the front end of the jet tube 41. This structure is conducive to taking into account the jet range of the dispersed water flow in the circumferential direction and the axial direction. The inner diameter of the jet tube 41 gradually increases along the water outlet direction, and the tip of the dispersion cone 422 is arranged corresponding to the center of the front end of the jet tube 41. This structure is conducive to further improving the water flow dispersion effect and expanding the spray range.

[0029] The scattering impeller 42 has a plurality of scattering ports 423 that penetrate the front and back and extend radially from the scattering cone 422 to the edge. The plurality of scattering ports 423 are radially arranged with the scattering cone 422 as the center on the scattering impeller 42. The plurality of scattering ports 423 can scatter the water flow for a second time, thereby further expanding the spraying range.

[0030] In order to facilitate the installation of the jet tube 41 and the scattering impeller 42 on the back spray arm 3, the rear end diameter of the jet tube 41 is increased to form a connecting sleeve 413 that can match the water outlet sleeve 32. The outer peripheral wall of the rear part of the connecting sleeve 413 is provided with an external thread. Correspondingly, the inner wall of the water outlet sleeve 32 is provided with an internal thread. The connecting sleeve 413 is threadedly connected to the water outlet sleeve 32. The front diameter of the connecting sleeve 413 is larger than the rear part and a step 414 is formed between the two. In the assembled state, the front end face of the water outlet sleeve 32 abuts against the step 414, and the outer peripheral wall of the water outlet sleeve 32 is flush with the outer peripheral wall of the front part of the connecting sleeve 413. Such a structure can also avoid the accumulation of residues at the connection.

[0031] From a top view, the water return area 11 is a triangular structure with smooth corner transitions. Each corner and its adjacent straight side parts enclose the first installation area 01, the second installation area 02, and the third installation area 03. The first installation area 01 is used to install the water pump 6, the second installation area 02 is used to install the heating element 7, and the third installation area 03 is used to install the slag collection basket 8. The box body 1 is provided with a bottom spray arm 9 arranged near the top of the water return area 11, and the bottom of the water pump 6 is provided with a water inlet connected to the water return area 11. The side of the water pump 6 is provided with a flow channel 61 extending spirally toward the central part of the triangular structure, and the end of the flow channel 61 extends upward to form a first water outlet port 601 connected to the bottom spray arm 9. The side of the water pump 6 is also provided with a second water outlet port 602 connected to the lower end of the inner water pipe 2.

[0032] In this embodiment, an auxiliary nozzle 4 is arranged on the back spray arm 3, and the outgoing water of the jet tube 41 can be dispersed in all directions by the scattering impeller 42, so as to expand the spray range, improve the spray effect, and effectively eliminate the problem of residue hanging on the wall; the auxiliary nozzle 4 of this embodiment is detachably connected to the water outlet sleeve 32 of the back spray arm 3 through a threaded connection structure, and the structure of the auxiliary nozzle 4 itself determines that it is not easy to be blocked, and even if it is blocked, it can be removed from the back spray arm 3 for cleaning and maintenance, which is very convenient.

[0033] 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 box (1), a concave water return area (11) being provided at the bottom of the box (1), an inner water pipe (2) being provided on the inner wall of the box (1), the lower end of which is connected to the water return area (11) and used for conveying water to the upper part of the box (1), and a back spray arm (3) being connected to the inner water pipe (2) being provided on the inner side wall of the box (1), characterized in that: The invention also comprises an auxiliary nozzle (4) arranged at the front side of the back spray arm (3); the front side of the back spray arm (3) is provided with a water guide port (31) and a water outlet sleeve (32) extending forward along the water guide port (31); the auxiliary nozzle (4) comprises a jet tube (41) extending forward and backward and a scattering impeller (42) rotatably constrained at the front end of the jet tube (41); the rear end of the jet tube (41) is detachably connected to the water outlet sleeve (32); the scattering impeller (42) is used to disperse the outlet water flow of the jet tube (41) in multiple directions.

2. The cleaning machine according to claim 1, characterized in that: An extension arm (411) is provided on the side of the jet tube (41) and extends forward to the front side of the jet tube (41); the front end of the extension arm (411) is bent perpendicularly to the axial direction of the jet tube (41) to form a connecting arm (412); and the scattering impeller (42) is located between the front end of the jet tube (41) and the connecting arm (412) and is constrained on the connecting arm (412).

3. The cleaning machine according to claim 2, characterized in that: The connecting arm (412) is provided with an assembly hole (4121) which is through-through from front to back and arranged corresponding to the front end of the jet tube (41), and a rotating shaft (421) which is rotatably constrained in the assembly hole (4121) is provided at the central portion of the front side of the scattering impeller (42).

4. The cleaning machine according to claim 1, 2 or 3, characterized in that: The central portion of the scattering impeller (42) is arranged corresponding to the front end port of the jet tube (41), and a dispersion cone (422) extending toward the front end port of the jet tube (41) is provided at the central portion of the rear side of the scattering impeller (42).

5. The cleaning machine according to claim 4, characterized in that: A gap is formed between the tip of the dispersion cone (422) and the front end of the jet tube (41).

6. The cleaning machine according to claim 4, characterized in that: The inner diameter of the jet tube (41) gradually increases along the water outlet direction, and the tip of the dispersion cone (422) is arranged corresponding to the center of the front end of the jet tube (41).

7. The cleaning machine according to claim 4, characterized in that: The scattering impeller (42) is provided with a plurality of scattering ports (423) which penetrate front and back and extend radially from the scattering cone (422) to the edge. The plurality of scattering ports (423) are radially arranged on the scattering impeller (42) with the scattering cone (422) as the center.

8. The cleaning machine according to claim 1, 2 or 3, characterized in that: The rear end diameter of the jet tube (41) is enlarged to form a connecting sleeve (413) that can match the water outlet sleeve (32). The outer peripheral wall of the rear part of the connecting sleeve (413) is provided with an external thread. Correspondingly, the inner wall of the water outlet sleeve (32) is provided with an internal thread. The connecting sleeve (413) is threadedly connected to the water outlet sleeve (32). The front part of the connecting sleeve (413) has a larger diameter than the rear part and a step (414) is formed between the two. In the assembled state, the front end face of the water outlet sleeve (32) abuts against the step (414), and the outer peripheral wall of the water outlet sleeve (32) is flush with the outer peripheral wall of the front part of the connecting sleeve (413).

9. The cleaning machine according to any one of claims 1, 2 or 3, characterized in that: When viewed from a top view, the water return area (11) is a triangular structure with a smoothly rounded corner. Each corner and its adjacent straight side portion enclose a first installation area (01), a second installation area (02), and a third installation area (03). The first installation area (01) is used to install a water pump (6), the second installation area (02) is used to install a heating element (7), and the third installation area (03) is used to install a slag collection basket (8).

10. The cleaning machine according to claim 9, characterized in that: The box body (1) is provided with a bottom spray arm (9) arranged near the top of the return water area (11); the bottom of the water pump (6) is provided with a water inlet connected to the return water area (11); the side of the water pump (6) is provided with a flow channel (61) extending spirally toward the central part of the triangular structure; the end of the flow channel (61) extends upward to form a first water outlet port (601) connected to the bottom spray arm (9); the side of the water pump (6) is also provided with a second water outlet port (602) connected to the lower end of the inner water pipe (2).

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