Spray arm for cleaning machine and cleaning machine

Abstract

The present invention relates to a spray arm and a cleaning machine for a cleaning machine, comprising a spray arm body, a water inlet is provided on the bottom wall of the spray arm body, a water inlet sleeve and a rotating slide, a bottom of the spray arm body is provided with a receiving groove arranged along the circumference of the water inlet, at least a part of the rotating slide is arranged in the receiving groove, and the upper end edge of the water inlet sleeve extends radially outward to form a supporting edge that can be supported on the rotating slide and rotated with it. The present invention places the rotating connection structure of the spray arm on the water inlet of the spray arm, and changes the rotating surface from the circumferential matching in the prior art to the upper and lower matching, such matching mode not only makes the rotation of the spray arm more stable, but also, because the water pressure in the spray arm is very high during the cleaning process, the water pressure forces the supporting edge of the water inlet sleeve to always be tightly against the rotating slide, ensuring that the assembly gap is always at a minimum value, so as to reduce the problem of water leakage and pressure relief at the assembly gap, thereby improving the cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to a spray arm for a washing machine and a washing machine. Background Art

[0002] As people's living standards improve, dishwashers have gradually become a common appliance in the kitchen. For dishwashers, the bottom spray arm plays a major role in spraying and cleaning, and its installation structure is particularly important.

[0003] The Chinese patent "Installation Structure of Dishwasher Lower Spray Arm" (application number: CN201821754395.4) with authorization announcement number CN209236086U discloses a structure, which includes a lower spray arm body and a lower spray arm mounting assembly. The lower spray arm mounting assembly is composed of an upper support, an inner ring and a lower support. A first guide hole is provided in the upper support, and a plurality of clips are provided in the first guide hole. A convex rib is provided on the upper part of the clip. A water inlet end is provided at the lower part of the lower spray arm body, and the water inlet end is inserted into the upper support. A guide ring and a positioning ring are provided above the water inlet end, and the convex rib is stuck between the guide ring and the positioning ring. The above scheme sets the lower spray arm mounting assembly so that the clip for fixing the lower spray arm is set on the mounting support of the lower spray arm, which is convenient for disassembly and assembly, and stable and reliable in rotation.

[0004] However, for the lower spray arm, if the above-mentioned gap matching method is used, the gap is too large, which can easily cause pressure relief and flow leakage, affecting the water pressure and the spray head, and thus affecting the cleaning effect. According to Bernoulli's principle, the loss of fluid in the sealed connection pipeline is mainly the head loss along the way and the structural resistance loss. For the above-mentioned gap connection structure, there will inevitably be volume loss, which will cause pressure relief and flow leakage problems. In order to reduce fluid loss, the existing spray arms connected by plug-in structures also use a method of reducing the cross-sectional area of ​​the gap. However, if the effect of basically avoiding losses is to be achieved, the problem of excessive pressure at the connection will arise, resulting in difficulty in rotating the spray arm. In order to maintain the normal rotation of the spray arm, large-angle acceleration holes are generally added to the spray arm design to maintain operation. However, the large-angle acceleration holes cannot play a cleaning role, which also causes fluid loss and affects the cleaning effect. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a spray arm for a cleaning machine in view of the current status of the prior art, which reduces the water leakage and pressure relief problems and improves the cleaning effect by placing a rotating structure on top and automatically compressing the seal during the rotation process.

[0006] The second technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned spray arm in view of the current status of the prior art.

[0007] The technical solution adopted by the present invention to solve at least one of the above technical problems is:

[0008] A spray arm for a cleaning machine comprises a spray arm body, a water inlet is formed on the bottom wall of the spray arm body, a water inlet sleeve and a rotating slide, a receiving groove arranged circumferentially along the water inlet is provided at the bottom of the spray arm body, at least a part of the rotating slide is provided in the receiving groove, and an upper end edge of the water inlet sleeve extends radially outward to form a supporting edge which can be supported on the rotating slide and rotatably cooperate with the rotating slide.

[0009] The present invention places the rotating connection structure of the spray arm on the water inlet of the spray arm, and changes the rotating surface from the circumferential fit in the prior art to the up-and-down fit. Such a fit not only makes the rotation of the spray arm more stable, but also, because the water pressure in the spray arm is very high during the cleaning process, the water pressure forces the supporting edge of the water inlet sleeve to always be tightly against the rotating slide, ensuring that the assembly gap is always at the minimum value, so as to reduce the water leakage and pressure relief problem at the assembly gap, thereby improving the cleaning effect.

[0010] Preferably, the upper surface of the rotating slide is provided with radially extending ribs, the ribs are multiple and arranged at intervals along the circumference of the rotating slide, and the ribs are slidably matched with the lower surface of the support. This structure further reduces the matching surface of the spray arm rotation, so as to further reduce friction and improve the smoothness of rotation.

[0011] As an improvement, in the assembled state, an assembly gap connected to the receiving groove is formed between the outer periphery of the support edge and the water inlet, and a radially penetrating liquid collecting groove is formed between two adjacent convex ribs. Water entering the receiving groove from the spray arm body through the assembly gap covers the liquid collecting groove to form a lubricating structure for lubricating the mating surface of the convex rib and the support edge. Since the problem of water leakage cannot be absolutely avoided even if the sealing at the assembly gap is good, the present invention utilizes this small amount of water leakage to form a lubricating structure in cooperation with the assembly structure. On the one hand, the water leakage can form a water seal on the surface of the liquid collecting groove and the convex rib to further improve the sealing performance. On the other hand, it can provide lubrication for the rotation of the spray arm to improve the smoothness and stability of the rotation of the spray arm.

[0012] As a further improvement, the lower surface of the support edge is provided with an annular rib arranged along the circumference and corresponding to the inner side of the rotating slide, and the annular rib is used to limit the radial position of the rotating slide and block the inner port of the liquid collecting tank. The annular rib can play two roles: radially limit the rotating slide to avoid radial displacement between the spray arm and the water inlet sleeve and shaking; prevent water in the liquid collecting tank from leaking out, and seal the accumulated liquid in the receiving tank to further improve the sealing performance.

[0013] In the present invention, a mounting sleeve extending downward along the edge of the water inlet is provided at the bottom of the spray arm body, and the bottom edge of the mounting sleeve extends radially inward to form a support ring, which together with the mounting sleeve encloses the accommodating groove.

[0014] Preferably, the cross-section of the rotating slide is an L-shaped structure, the lateral part of the L-shaped structure is supported on the support ring, and the vertical part of the L-shaped structure extends downward close to the inner edge of the support ring. Accordingly, the lower surface of the support edge is provided with a limiting portion that can be relatively limited with the inner circumferential surface of the vertical portion.

[0015] In the cleaning state, the water in the spray arm body presses the support edge downwards to keep it always pressing the rotating slide, so as to improve the sealing performance and reduce water leakage and pressure relief.

[0016] In order to reduce fluid energy loss, the support edge and the water inlet sleeve are smoothly connected through an arc structure. In the assembled state, the upper surface of the support edge smoothly transitions to the inner bottom wall of the spray arm body.

[0017] In order to improve assembly reliability, the water inlet jacket is plug-fitted and connected to the water outlet of the water pump therebelow, and a positioning piece for limiting the rotation of the water inlet jacket relative to the water pump is arranged on the outer periphery of the water inlet jacket.

[0018] Preferably, the water pump has a water outlet at the top and a water outlet sleeve extending upward from the periphery of the water outlet, the water inlet sleeve is inserted into the water outlet sleeve, and a sealing ring arranged along the circumferential direction is provided between the outer peripheral wall of the water inlet sleeve and the inner peripheral wall of the water outlet sleeve. The water inlet sleeve of the present invention does not rotate relative to the water pump and is sealed by the sealing ring, and there is no water leakage and pressure relief problem at the connection between the two.

[0019] Preferably, the outer peripheral wall of the water inlet jacket is provided with a circumferentially arranged groove, a part of the sealing ring is embedded in the groove, and the outer periphery of the sealing ring is provided with a sealing rib for extrusion sealing with the inner peripheral wall of the water outlet jacket. This structure is conducive to further improving the sealing effect.

[0020] Preferably, the positioning member is an annular structure sleeved on the outer periphery of the water inlet jacket and constrained on the water pump, and a limiting opening is opened on the outer peripheral wall of the water inlet jacket. Correspondingly, a positioning block capable of engaging and limiting with the limiting opening is provided on the inner periphery of the positioning member. Further preferably, the bottom wall of the spray arm body is provided with an outer ring sleeve located on the outer periphery of the accommodating groove and extending downward, and the lower edge of the outer ring sleeve is arranged close to the upper surface of the positioning member and is used to limit the upper and lower positions of the spray arm body. The above structure is adopted to improve the sealing and reliability of the connection between the water inlet jacket and the water pump.

[0021] Preferably, the outer ring sleeve, the bottom wall of the spray arm body, and the upper surface of the positioning member together enclose a cavity for enclosing the connection between the water inlet sleeve and the water inlet of the spray arm body. Since the connection structure between the water inlet sleeve and the spray arm body is exposed above the filter plate, it is in direct contact with the environment in the washing chamber, and there is a large amount of return water containing food residues on the filter, the above structure can protect the assembly of the spray arm and the water inlet sleeve to avoid affecting the rotation effect due to the accumulation of small residues.

[0022] In order to prevent the rotating slide from rotating in the circumferential direction, a downwardly extending clamping foot is provided at the bottom of the rotating slide, and correspondingly, a socket is provided at the bottom of the accommodating groove to be plugged with the clamping foot to limit the rotating slide.

[0023] A cleaning machine comprises a box body, wherein a concave water return area is arranged at the bottom of the box body, the top of the water return area is covered with a filter plate, and further comprises the above-mentioned spray arm, wherein the spray arm is located above the filter plate.

[0024] Compared with the prior art, the advantages of the present invention are: the present invention places the rotating connection structure of the spray arm on the water inlet of the spray arm, and changes the rotating surface from the circumferential cooperation in the prior art to the up and down cooperation. Such cooperation not only makes the rotation of the spray arm more stable, but also, because the water pressure in the spray arm is very high during the cleaning process, the water pressure forces the supporting edge of the water inlet sleeve to always be tightly against the rotating slide, ensuring that the assembly gap is always at the minimum value, so as to reduce the problem of water leakage and pressure relief at the assembly gap, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of embodiments 1 and 2 of the present invention;

[0026] Figure 2 for Figure 1 A cross-sectional view of

[0027] Figure 3 It is a schematic diagram of the structure of the water inlet jacket in embodiments 1 and 2 of the present invention;

[0028] Figure 4 is a schematic structural diagram of a rotating slide in Embodiment 2 of the present invention;

[0029] Figure 5 It is a schematic diagram of a part of the structure of the spray arm body in Embodiments 1 and 2 of the present invention;

[0030] Figure 6 for Figure 2 A magnified view of part A;

[0031] Figure 7 for Figure 2 Magnified view of part B. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the accompanying drawings.

[0033] Embodiment 1:

[0034] like Figures 1 to 3 As shown in , 5 to 7, the spray arm of the cleaning machine in this embodiment comprises a spray arm body 1, a water inlet sleeve 2 and a rotating slide 3. A water inlet 11 is provided on the bottom wall of the spray arm body 1. A receiving groove 12 arranged circumferentially along the water inlet 11 is provided at the bottom of the spray arm body 1. At least a part of the rotating slide 3 is provided in the receiving groove 12. The upper end edge of the water inlet sleeve 2 extends radially outward to form a supporting edge 21 that can be supported on the rotating slide 3 and rotated with it.

[0035] In order to prevent the rotating slide 3 from rotating in the circumferential direction, a downwardly extending clamping foot 35 is provided at the bottom of the rotating slide 3. Correspondingly, a socket 121 is formed at the bottom of the accommodating groove 12 to be plugged with the clamping foot 35 to limit the rotating slide 3.

[0036] The bottom of the spray arm body 1 is provided with a mounting sleeve 13 extending downward along the edge of the water inlet 11, and the bottom edge of the mounting sleeve 13 extends radially inward to form a support ring 14, and the support ring 14 and the mounting sleeve 13 together enclose the above-mentioned accommodating groove 12. The cross section of the rotating slide 3 is an L-shaped structure, and the transverse part 31 of the L-shaped structure is supported on the support ring 14, and the vertical part 32 of the L-shaped structure extends downward close to the inner edge of the support ring 14. Correspondingly, the lower surface of the support edge 21 is provided with a limiting portion that can limit relative to the inner circumference of the vertical part 32.

[0037] In the cleaning state, the water in the spray arm body 1 presses the support edge 21 downward to keep it always pressed against the rotating slide 3, so as to improve the sealing performance and reduce the water leakage and pressure relief. In order to reduce the fluid energy loss, the support edge 21 and the water inlet jacket 2 are smoothly connected by the arc structure 22. In the assembled state, the upper surface of the support edge 21 and the inner bottom wall of the spray arm body 1 are smoothly connected.

[0038] In order to improve assembly reliability, the water inlet jacket 2 is plugged and connected with the water outlet of the water pump 4 below it, and a positioning member 5 is provided on the outer periphery of the water inlet jacket 2 for limiting the rotation of the water inlet jacket 2 relative to the water pump 4. The top of the water pump 4 is provided with a water outlet 41 and a water outlet jacket 42 extending upward from the outer periphery of the water outlet 41. The water inlet jacket 2 is inserted into the water outlet jacket 42, and a sealing ring 6 arranged along the circumferential direction is provided between the outer peripheral wall of the water inlet jacket 2 and the inner peripheral wall of the water outlet jacket 42. There is no relative rotation between the water inlet jacket 2 and the water pump 4 of this embodiment, and they are sealed by the sealing ring 6, and there is no water leakage and pressure relief problem at the connection between the two.

[0039] The outer wall of the water inlet jacket 2 is provided with a circumferentially arranged groove 24, in which a portion of the sealing ring 6 is embedded, and a sealing rib 61 is provided on the periphery of the sealing ring 6 for extrusion sealing with the inner wall of the water outlet jacket 42. This structure is conducive to further improving the sealing effect.

[0040] The positioning member 5 is an annular structure sleeved on the outer periphery of the water inlet sleeve 2 and constrained on the water pump 4 by a snap-fit ​​structure. A limiting opening 25 is opened on the outer peripheral wall of the water inlet sleeve 2. Correspondingly, a positioning block 51 capable of engaging and limiting with the limiting opening 25 is provided on the inner periphery of the positioning member 5. The bottom wall of the spray arm body 1 is provided with an outer ring sleeve 15 located on the outer periphery of the accommodating groove 12 and extending downward. The lower edge of the outer ring sleeve 15 is arranged close to the upper surface of the positioning member 5 and is used to limit the upper and lower positions of the spray arm body 1. The above structure is adopted to improve the sealing and reliability of the connection between the water inlet sleeve 2 and the water pump 4. The outer ring sleeve 15, the bottom wall of the spray arm body 1, and the upper surface of the positioning member 5 together enclose a cavity 200 for enclosing the connection between the water inlet sleeve 2 and the water inlet 11 of the spray arm body 1. Since the connection structure between the water inlet sleeve 2 and the spray arm body 1 is exposed above the filter plate and is in direct contact with the environment in the washing chamber, and there is a large amount of return water containing food residues on the filter, the above structure can protect the assembly of the spray arm and the water inlet sleeve to avoid affecting the rotation effect due to the accumulation of small residues.

[0041] The cleaning machine of this embodiment includes a box body, a concave water return area is arranged at the bottom of the box body, the top of the water return area is covered with a filter plate, and also includes the above-mentioned spray arm, which is located above the filter plate.

[0042] In this embodiment, the rotating connection structure of the spray arm is placed on the water inlet 11 of the spray arm, and the rotating surface is changed from the circumferential fit in the prior art to the up and down fit. Such a fit not only makes the rotation of the spray arm more stable, but also, because the water pressure in the spray arm is very high during the cleaning process, the water pressure forces the supporting edge 21 of the water inlet sleeve 2 to always be tightly against the rotating slide 3, ensuring that the assembly gap is always at the minimum value, so as to reduce the water leakage and pressure relief problem at the assembly gap, thereby improving the cleaning effect.

[0043] Embodiment 2:

[0044] like Figures 1 to 7 As shown, in this embodiment, the upper surface of the rotating slide 3 is provided with a radially extending rib 33, and the rib 33 is multiple and arranged at intervals along the circumference of the rotating slide 3. The rib 33 is slidably matched with the lower surface of the support edge 21. This structure further reduces the matching surface of the spray arm rotation to further reduce friction and improve the smoothness of rotation.

[0045] In the assembled state, an assembly gap 100 connected to the receiving groove 12 is formed between the outer periphery of the supporting edge 21 and the water inlet 11, and a radially penetrating liquid collecting groove 34 is formed between two adjacent convex ribs 33. The water entering the receiving groove 12 from the spray arm body 1 through the assembly gap 100 covers the liquid collecting groove 34 to form a lubricating structure for lubricating the mating surface of the convex rib 33 and the supporting edge 21. Since the problem of water leakage cannot be absolutely avoided even if the sealing at the assembly gap is good, this embodiment uses this small amount of water leakage to form a lubricating structure in cooperation with the assembly structure. On the one hand, the water leakage can form a water seal on the surface of the liquid collecting groove 34 and the convex rib 33 to further improve the sealing performance. On the other hand, it can provide lubrication for the rotation of the spray arm to improve the smoothness and stability of the rotation of the spray arm.

[0046] The lower surface of the support edge 21 is provided with an annular rib 23 arranged along the circumferential direction and corresponding to the inner side of the rotating slide 3. The annular rib 23 is used to limit the radial position of the rotating slide 3 and block the inner port of the liquid collecting groove 34. The annular rib 23 can play two roles: radially limit the rotating slide 3 to prevent radial displacement between the spray arm and the water inlet jacket 2 and shaking; prevent the water in the liquid collecting groove 34 from leaking out, and seal the accumulated liquid in the containing groove 12 to further improve the sealing performance.

[0047] 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 spray arm for a cleaning machine, comprising a spray arm body (1), a water inlet (11) being provided on the bottom wall of the spray arm body (1), characterized in that: It also comprises a water inlet sleeve (2) and a rotating slide (3), wherein the bottom of the spray arm body (1) is provided with a receiving groove (12) arranged circumferentially along the water inlet (11), at least a part of the rotating slide (3) is arranged in the receiving groove (12), and the upper end edge of the water inlet sleeve (2) extends radially outward to form a supporting edge (21) capable of supporting on the rotating slide (3) and rotatingly cooperating with the rotating slide (3); The upper surface of the rotating slide (3) is provided with a convex rib (33) extending in the radial direction, the convex rib (33) is multiple and arranged at intervals along the circumference of the rotating slide (3), and the convex rib (33) is slidably matched with the lower surface of the supporting edge (21); In the assembled state, an assembly gap (100) connected to the receiving groove (12) is formed between the outer periphery of the supporting edge (21) and the water inlet (11), and a radially penetrating liquid collecting groove (34) is formed between two adjacent convex ribs (33). Water entering the receiving groove (12) from the spray arm body (1) through the assembly gap (100) covers the liquid collecting groove (34) to form a lubricating structure for lubricating the mating surface between the convex rib (33) and the supporting edge (21); The lower surface of the supporting edge (21) is provided with an annular rib (23) arranged along the circumferential direction and corresponding to the inner side of the rotating slide (3). The annular rib (23) is used to limit the radial position of the rotating slide (3) and block the inner port of the liquid collecting tank (34).

2. The spray arm for a cleaning machine according to claim 1, characterized in that: The bottom of the spray arm body (1) is provided with a mounting sleeve (13) extending downward along the edge of the water inlet (11); the bottom edge of the mounting sleeve (13) extends radially inward to form a support ring (14); the support ring (14) and the mounting sleeve (13) together enclose the accommodating groove (12).

3. The spray arm for a cleaning machine according to claim 2, characterized in that: The cross section of the rotating slide (3) is an L-shaped structure, the transverse portion (31) of the L-shaped structure is supported on the support ring (14), and the vertical portion (32) of the L-shaped structure extends downward close to the inner edge of the support ring (14). Correspondingly, the lower surface of the support edge (21) is provided with a limiting portion that can limit relative to the inner peripheral surface of the vertical portion (32).

4. The spray arm for a cleaning machine according to claim 1, characterized in that: In the cleaning state, the water in the spray arm body (1) presses the support edge (21) downwards so that it always has a tendency to press against the rotating slide (3).

5. The spray arm for a cleaning machine according to claim 1, characterized in that: The support edge (21) and the water inlet sleeve (2) are smoothly connected via an arc structure (22); in the assembled state, the upper surface of the support edge (21) smoothly transitions to the inner bottom wall of the spray arm body (1).

6. The spray arm for a cleaning machine according to claim 1, characterized in that: The water inlet jacket (2) is plug-fittedly connected to a water outlet (41) of a water pump (4) below it, and a positioning member (5) is provided on the outer periphery of the water inlet jacket (2) for limiting the rotation of the water inlet jacket (2) relative to the water pump (4).

7. The spray arm for a cleaning machine according to claim 6, characterized in that: The water pump (4) is provided with a water outlet (41) and a water outlet sleeve (42) extending upwardly from the periphery of the water outlet (41) at the top, the water inlet sleeve (2) is inserted into the water outlet sleeve (42), and a sealing ring (6) arranged along the circumferential direction is provided between the outer peripheral wall of the water inlet sleeve (2) and the inner peripheral wall of the water outlet sleeve (42).

8. The spray arm for a cleaning machine according to claim 7, characterized in that: The outer peripheral wall of the water inlet jacket (2) is provided with a circumferentially arranged groove (24), a part of the sealing ring (6) is embedded in the groove (24), and the outer periphery of the sealing ring (6) is provided with a sealing rib (61) for extrusion sealing with the inner peripheral wall of the water outlet jacket (42).

9. The spray arm for a cleaning machine according to claim 6, characterized in that: The positioning member (5) is an annular structure sleeved on the outer circumference of the water inlet jacket (2) and constrained on the water pump (4). A limiting opening (25) is provided on the outer circumferential wall of the water inlet jacket (2). Correspondingly, a positioning block (51) capable of engaging with the limiting opening (25) for limiting positioning is provided on the inner circumference of the positioning member (5).

10. The spray arm for a cleaning machine according to claim 6, characterized in that: The bottom wall of the spray arm body (1) is provided with an outer ring sleeve (15) located at the periphery of the accommodating groove (12) and extending downward, and the lower edge of the outer ring sleeve (15) is arranged close to the upper surface of the positioning member (5) and is used to limit the upper and lower positions of the spray arm body (1).

11. The spray arm for a cleaning machine according to claim 10, characterized in that: The outer ring sleeve (15), the bottom wall of the spray arm body (1), and the upper surface of the positioning member (5) together enclose a cavity (200) for surrounding the connection between the water inlet sleeve (2) and the water inlet (11) of the spray arm body (1).

12. The spray arm for a cleaning machine according to any one of claims 1 to 11, characterized in that: The bottom of the rotating slide (3) is provided with a downwardly extending clamping foot (35), and correspondingly, the bottom of the accommodating groove (12) is provided with a socket (121) which is plugged into the clamping foot (35) to limit the rotating slide (3).

13. A cleaning machine, comprising a box, wherein a concave water return area is provided at the bottom of the box, and a filter plate is covered on the top of the water return area, characterized in that: It also comprises the spray arm according to any one of claims 1 to 12, wherein the spray arm is located above the filter plate.

Images