Cleaning machine

Abstract

The utility model relates to a cleaning machine which comprises a 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 a water return area, the inner water pipe is used for conveying water flow to the upper portion of the box body, a back spraying arm communicated with the inner water pipe is arranged on the inner side wall of the box body, and the cleaning machine further comprises an auxiliary nozzle arranged on the front side of the back spraying arm. The front side of the back spraying arm is provided with a water guide opening and a water outlet sleeve extending forwards along the water guide opening, the auxiliary nozzle comprises a water conveying pipe section extending front and back and a spraying pipe section vertically and detachably connected to the front end of the water conveying pipe section, and the rear end of the water conveying pipe is rotationally connected to the water outlet sleeve through a threaded connection assembly. A plurality of water spraying holes which are distributed at intervals in the length direction of the spraying pipe section are formed in the spraying pipe section. According to the auxiliary nozzle, the spraying range can be enlarged, so that the spraying effect is improved, the problem that residues are hung on the wall is effectively solved, the auxiliary nozzle is detachably connected to the water outlet sleeve of the back spraying arm through the threaded connection assembly, and all parts are very convenient to clean, repair and maintain.

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 tabletop and cabinet dishwashers, due to their large washing space, in order to achieve better washing results, they are generally designed with three spray arms: top, middle and bottom. When working, the washing pump transports water to the top, middle and bottom spray arms through pipes. The water is sprayed out from the top, middle and bottom spray arms, rinses the dishes, and then falls back into the water cup at the bottom of the dishwasher. The washing pump transports the fallen water to the top, middle and bottom spray arms again, completing a cycle.

[0003] The applicant's prior patent, ZL 202023347953.5, "A Water Flow System and Washing Machine Using the Same," discloses a structure in which a middle spray arm is positioned above and to the side of a bottom spray arm, spraying a lateral jet of water toward the area above the bottom spray arm. This structure assists the bottom spray arm, improving the spray effect on the lower dish rack to a certain extent.

[0004] However, due to the fixed position of the spray holes on the above-mentioned middle spray arm, its spray range is small, limiting its auxiliary spray effect. At the same time, there may be a problem of residue sticking to the side walls of the existing washing chamber, affecting the cleaning effect and user experience. To solve the above problems, 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. However, since the nozzle is restrained to the main body of the back spray arm by a snap-on structure, if the auxiliary nozzle is blocked or has problems such as clogging, 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 response to the current status of the existing technology.

[0006] The technical solution adopted by the present invention 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, the inner side wall of the box body is provided with a back spray arm connected to the inner water pipe, and also includes an auxiliary nozzle arranged on the front side of the back spray arm, the front side of the back spray arm is provided with a water guide port and a water outlet sleeve extending forward along the water guide port, the auxiliary nozzle includes a water supply pipe section extending forward and backward and a spray pipe section vertically detachably connected to the front end of the water supply pipe section, the rear end of the water supply pipe section is rotatably connected to the water outlet sleeve through a threaded connection assembly, and the spray pipe section is provided with a plurality of water spray holes arranged at intervals along its length.

[0008] Preferably, the threaded connection assembly includes a first connecting sleeve and a second connecting sleeve. The first connecting sleeve is threadedly connected to the outer periphery of the water outlet sleeve, and the second connecting sleeve is threadedly connected to the front end of the first water outlet sleeve. The rear end of the water pipe section is rotatably connected to the front end of the second connecting sleeve via a bearing. This structure not only facilitates connecting the water pipe section to the front side of the back spray arm, but also ensures stable rotation, thereby improving the back spray cleaning effect.

[0009] Preferably, the outer peripheral wall of the water outlet sleeve is provided with an external thread, the inner wall of the first connecting sleeve is provided with an internal thread, the first connecting sleeve is threadedly connected to the outer periphery of the water outlet sleeve, the front outer diameter of the first connecting sleeve is reduced and an external thread is formed on the outer peripheral wall, the inner wall of the rear part of the second connecting sleeve is provided with an internal thread, and the rear part of the second connecting sleeve is threadedly connected to the front outer periphery of the first connecting sleeve.

[0010] Preferably, the rear portion of the water pipe section is rotatably inserted into the front portion of the second connecting sleeve. The rear end of the water pipe section is formed with a first assembly section and a second assembly section, each of which has an inner diameter that gradually decreases toward the rear. A first step surface is formed at the front end of the first assembly section, and a second step surface is formed at the junction of the first and second assembly sections. The bearing sleeve is positioned around the outer periphery of the first assembly section. A retaining ring is protruding from the inner circumferential wall of the second connecting sleeve and positioned between the first step surface and the bearing. The second connecting sleeve is provided with a retaining member that connects to the second assembly section and axially limits it. This structure not only facilitates assembly of the various components but also ensures good sealing and rotational stability.

[0011] Preferably, a first ball assembly is sandwiched between the retaining ring and the first stepped surface, a second ball assembly is sandwiched between the bearing and the retaining ring, and the bearing is positioned near the rear end of the second assembly section, with its rear end surface abutting against the retaining member. This structure improves sealing and the compactness of the components, thereby enhancing rotational stability.

[0012] Preferably, the outer peripheral wall of the second assembly section is provided with an external thread, and the limiting member is a nut screwedly connected to the outer periphery of the second assembly section.

[0013] Preferably, the front end of the water pipe section is a blind end, and a first water outlet and a second water outlet are symmetrically arranged on both sides of the water pipe section. A spray pipe section is threadedly connected to the first water outlet, and a spray pipe section is threadedly connected to the second water outlet. The present invention can be provided with two or more sets of water pipe sections and corresponding spray pipe sections to achieve a better back spray cleaning effect.

[0014] Preferably, the arrangement of the multiple spray holes on the spray pipe section near the first water outlet is gradually tilted downward along the direction of water flow; and the arrangement of the multiple spray holes on the spray pipe section near the second water outlet is gradually tilted upward along the direction of water flow. This structure facilitates the rotation of the auxiliary nozzles by the viscosity of the water flow, further expanding the spray range.

[0015] Preferably, when viewed from above, the return water area is a triangular structure with smoothly rounded corners. Each corner and its adjacent straight-side portion 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 heater, and the third installation area is used to install a slag basket. The box body is provided with a bottom spray arm arranged near the top of the return water area. The bottom of the water pump is provided with a water inlet connected to the return water area. The side of the water pump is provided with a flow channel that spirally extends toward the center 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. 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 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 dishware 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 is then further drawn into the spray arm through the water suction port in the return water area through the open water pump. However, since the offset distance of the debris collecting basket relative to the bottom wall of the box body is too large, the return water enters the return water area before flowing to the debris collecting basket, resulting in poor debris 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 washing machine determines that the heating element located next to the water pump is also offset on the bottom wall of the box. In order to improve the heating efficiency, it is necessary to have an appropriate return water area above the heating element. 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 and affecting the water efficiency of the washing 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. Then, the water outlet is guided to the remaining space in the center of the triangular structure through the offset water outlet of the water pump, which maximizes the use of the space of the return water area. It 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. Since the water pump no longer occupies the central part of the bottom of the washing machine, the slag collection basket can be closer to the central part of the bottom of the washing machine, which is beneficial to improve the slag collection effect.

[0016] Compared with the prior art, the advantages of the present invention are: the auxiliary nozzle of the present invention can expand the spray range, thereby improving the spray effect and effectively eliminating the problem of residue hanging on the wall. The auxiliary nozzle is detachably connected to the water outlet sleeve of the back spray arm through a threaded connection assembly. The auxiliary nozzle also includes a split and detachable water supply pipe section and a spray arm pipe section. Since the water spray hole is arranged on the spray pipe section, the probability of blockage in the spray pipe section is greater. The spray pipe section can also be removed from the water supply pipe section, and each part can be cleaned and maintained, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0020] Figure 4 for Figure 2 Partial exploded view of

[0021] Figure 5 This is an assembly diagram of the various components in the return water 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 with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 5 As shown, the cleaning machine of this embodiment includes a box body 1, a concave return water 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 return water 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.

[0024] The front side of the back spray arm 3 is provided with a water inlet 31 and a water outlet sleeve 32 extending forward along the water inlet 31. The auxiliary nozzle 4 includes a water supply pipe section 41 extending forward and backward and a spray pipe section 42 vertically detachably connected to the front end of the water supply pipe section 41. The rear end of the water supply pipe section 41 is rotatably connected to the water outlet sleeve 32 through a threaded connection assembly 5. The spray pipe section 42 is provided with a plurality of water spray holes 421 arranged at intervals along its length.

[0025] The threaded connection assembly 5 includes a first connection sleeve 51 and a second connection sleeve 52. The first connection sleeve 51 is threadedly connected to the outer periphery of the water outlet sleeve 32, and the second connection sleeve 52 is threadedly connected to the front end of the first water outlet sleeve 51. The rear end of the water delivery pipe section 41 is rotatably connected to the front end of the second connection sleeve 52 via a bearing 53. This structure not only facilitates the connection of the water delivery pipe section 41 to the front side of the back spray arm 3, but also ensures stable rotation, thereby improving the back spray cleaning effect.

[0026] Specifically, the outer peripheral wall of the water outlet sleeve 32 is provided with an external thread, the inner wall of the first connecting sleeve 51 is provided with an internal thread, the first connecting sleeve 51 is threadedly connected to the outer periphery of the water outlet sleeve 32, the front outer diameter of the first connecting sleeve 51 is reduced and an external thread is formed on the outer peripheral wall, the inner wall of the rear of the second connecting sleeve 52 is provided with an internal thread, and the rear of the second connecting sleeve 52 is threadedly connected to the front outer periphery of the first connecting sleeve 51.

[0027] The rear part of the water pipe section 41 can be rotatably inserted into the front part of the second connecting sleeve 52. The rear end of the water pipe section 41 is formed with a first assembly section 411 and a second assembly section 412, the inner diameter of which gradually decreases toward the rear. A first step surface 401 is formed at the front end of the first assembly section 411, and a second step surface 402 is formed at the junction of the first assembly section 411 and the second assembly section 412. The bearing 53 is sleeved on the outer periphery of the first assembly section 411, and the inner peripheral wall of the second connecting sleeve 52 is convexly provided with a limiting ring 521 located between the first step surface 401 and the bearing 53. The second connecting sleeve 52 is provided with a limiting member connected to the second assembly section 412 and axially limiting it.

[0028] The first ball assembly 10 is held between the retaining ring 521 and the first stepped surface 401. The second ball assembly 20 is held between the rear portion of the bearing 53 and the retaining ring 521. The rear portion of the bearing 53 is positioned near the rear end of the second assembly section 412, with its rear end abutting against the retaining member. The outer peripheral wall of the second assembly section 412 is provided with external threads, and the retaining member is a nut 54 threadedly connected to the outer periphery of the second assembly section 412.

[0029] In this embodiment, the front end of the water supply pipe section 41 is a blind end. A symmetrically arranged first water outlet 100 and second water outlet 200 are formed on either side of the water supply pipe section 41. A spray pipe section 42 is threadedly connected to the first water outlet 100, and a spray pipe section 42 is threadedly connected to the second water outlet 200. This embodiment can include two or more groups of water supply pipe sections 41 and corresponding spray pipe sections 42 to achieve a better back spray cleaning effect. On the spray pipe section 42 located on the side of the first water outlet 100, the arrangement direction of the multiple water spray holes 421 gradually tilts downward along the direction of water flow; on the spray pipe section 42 located on the side of the second water outlet 200, the arrangement direction of the multiple water spray holes 421 gradually tilts upward along the direction of water flow. The above structure facilitates the rotation of the auxiliary nozzle 4 by the viscosity of the water flow, thereby further expanding the spray range.

[0030] From a top-down perspective, the return water area 11 is a triangular structure with smoothly rounded corners. Each corner, along with its adjacent straight-side portion, encloses 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 the water pump 6, the second installation area 02 is used to install the heater 7, and the third installation area 03 is used to install the slag basket 8. A bottom spray arm 9 is provided in the casing 1, positioned near the top of the return water area 11. A water inlet connected to the return water area 11 is provided at the bottom of the water pump 6. A flow channel 61 spirally extending toward the center of the triangular structure is provided on the side of the water pump 6. The distal end of the flow channel 61 extends upward to form a first water outlet port 601 connected to the bottom spray arm 9. A second water outlet port 602 connected to the lower end of the inner water pipe 2 is also provided on the side of the water pump 6.

[0031] The auxiliary nozzle 4 of this embodiment can expand the spraying range, thereby improving the spraying effect and effectively eliminating the problem of residue hanging on the wall. The auxiliary nozzle 4 is detachably connected to the water outlet sleeve 32 of the back spray arm 3 through a threaded connection assembly 5. The auxiliary nozzle 4 also includes a detachable water supply pipe section 41 and a spray arm pipe section 42. Since the water spray hole 421 is provided on the spray pipe section 42, the probability of blockage of the spray pipe section 32 is greater. The spray pipe section 42 can also be removed from the water supply pipe section 41, and each part can be cleaned and maintained, which is very convenient.

[0032] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. 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 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 comprises a water delivery pipe section (41) extending forward and backward and a spray pipe section (42) vertically connected to the front end of the water delivery pipe section (41) in a detachable manner; the rear end of the water delivery pipe section is rotatably connected to the water outlet sleeve (32) via a threaded connection assembly (5); and the spray pipe section (42) is provided with a plurality of water spray holes (421) arranged at intervals along its length direction.

2. The cleaning machine according to claim 1, characterized in that: The threaded connection assembly (5) comprises a first connection sleeve (51) and a second connection sleeve (52); the first connection sleeve (51) is threadedly connected to the outer periphery of the water outlet sleeve (32); the second connection sleeve (52) is threadedly connected to the front end of the first water outlet sleeve (32); and the rear end of the water delivery pipe section (41) is rotatably connected to the front end of the second connection sleeve (52) via a bearing (53).

3. The cleaning machine according to claim 2, characterized in that: The outer peripheral wall of the water outlet sleeve (32) is provided with an external thread, the inner wall of the first connecting sleeve (51) is provided with an internal thread, the first connecting sleeve (51) is threadedly connected to the outer periphery of the water outlet sleeve (32), the front outer diameter of the first connecting sleeve (51) is reduced and an external thread is formed on the outer peripheral wall, the inner wall of the rear part of the second connecting sleeve (52) is provided with an internal thread, and the rear part of the second connecting sleeve (52) is threadedly connected to the front outer periphery of the first connecting sleeve (51).

4. The cleaning machine according to claim 2, characterized in that: The rear part of the water delivery pipe section (41) is rotatably inserted into the front part of the second connecting sleeve (52); the rear end of the water delivery pipe section (41) is formed with a first assembly section (411) and a second assembly section (412) whose inner diameter gradually decreases toward the rear; a first step surface (401) is formed at the front end of the first assembly section (411); a second step surface (402) is formed at the junction of the first assembly section (411) and the second assembly section (412); the bearing (53) is sleeved on the outer periphery of the first assembly section (411); a limiting ring (521) is convexly provided on the inner peripheral wall of the second connecting sleeve (52) and is located between the first step surface (401) and the bearing (53); and a limiting member connected to the second assembly section (412) and axially limiting it is provided in the second connecting sleeve (52).

5. The cleaning machine according to claim 4, characterized in that: A first ball assembly (10) is clamped between the limiting ring (521) and the first step surface (401), a second ball assembly (20) is clamped between the rear portion of the bearing (53) and the limiting ring (521), and the rear portion of the bearing (53) is arranged close to the rear end of the second assembly section (412) and the rear end surface abuts against the limiting member.

6. The cleaning machine according to claim 4, characterized in that: The outer peripheral wall of the second assembly section (412) is provided with an external thread, and the limiting member is a nut (54) screwedly connected to the outer periphery of the second assembly section (412).

7. The cleaning machine according to any one of claims 1 to 6, characterized in that: The front end of the water delivery pipe section (41) is a blind end, and a first water outlet (100) and a second water outlet (200) are symmetrically arranged on both sides of the water delivery pipe section (41); a spray pipe section (42) is threadedly connected to the first water outlet (100), and a spray pipe section (42) is threadedly connected to the second water outlet (200).

8. The cleaning machine according to claim 7, characterized in that: On the spray pipe section (42) located on the first water outlet (100) side, the arrangement direction of the multiple water spray holes (421) gradually tilts downward along the water flow direction; on the spray pipe section (42) located on the second water outlet (200) side, the arrangement direction of the multiple water spray holes (421) gradually tilts upward along the water flow direction.

9. The cleaning machine according to any one of claims 1 to 6, 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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