Water flow system for cleaning machine and cleaning machine

Abstract

The present invention relates to a water flow system for a cleaning machine and a cleaning machine, comprising a pump housing and a spray arm, wherein a water outlet is provided on the top of the pump housing, a water inlet which can be connected to the water outlet is provided on the bottom wall of the spray arm, and a water inlet sleeve, a clamping ring and a slip ring are provided, wherein the water inlet sleeve is connected from top to bottom and the lower end is connected to the water outlet of the pump housing, the clamping ring is arranged on the outer periphery of the water inlet sleeve and is used to constrain the water inlet sleeve on the pump housing, the slip ring is rotatably arranged at the water inlet of the spray arm, and a slip ring which is located in the water inlet and is rotatably matched with the slip ring is formed at the upper end of the water inlet sleeve. The water inlet sleeve of the present invention forms a secondary rotational match with the spray arm through an independent slip ring and its own slip ring, thereby improving the rotational smoothness of the spray arm; since the matching clearance between the secondary rotational matching structures is constantly changing, the mud and sand stuck in the assembly clearance can be taken away by a small amount of water discharge, thereby avoiding mud and sand stuck, and further improving the rotational stability of the spray arm.

Description

Technical Field

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

[0002] As people's living standards improve, dishwashers have gradually become a commonly used appliance in the kitchen.

[0003] The applicant's prior application CN202222626061.1 "Water flow system and cleaning machine for cleaning machine" discloses a structure including a pump casing, a space guide vane, an impeller and a spray arm. The pump casing is provided with a water suction port at the bottom and a water outlet at the top; the space guide vane includes a cover plate and a guide vane. The cover plate is transversely arranged in the middle of the pump casing and divides the inner cavity of the pump casing into relatively independent upper and lower cavities. The water outlet is connected to the upper cavity. There are multiple guide vanes and they are vertically arranged on the lower surface of the cover plate. Multiple guide vanes cover the cover plate. The guide vanes are spirally extended inward from the edge of the cover plate in the opposite direction of the water flow, and a guide channel is constrained between two adjacent guide vanes. The cover plate portion corresponding to the top of the guide vane is at least partially missing to form a gap for connecting the water guide channel with the upper cavity; the impeller is rotatably arranged in the lower cavity, and the bottom of the impeller is provided with an inlet corresponding to the arrangement of the water suction port, and the side is provided with an outlet corresponding to the arrangement of the guide vanes; the spray arm is rotatably arranged on the pump housing, and the bottom is provided with a water inlet corresponding to the arrangement of the water outlet.

[0004] The above scheme sets a space guide vane and impeller in the pump housing for axially guiding and pressurizing the axial water inlet and then outputting it axially to meet the water pressure requirements. On this basis, the spray arm is set on the pump housing without the need to cooperate with the impeller, which improves the stability of the water flow entering the spray arm and thus improves the rotation stability of the spray arm. However, since the connection between the spray arm and the pump housing is a single-stage rotation connection, it is easy for mud and sand to get stuck at the inlet of the spray arm, which in turn causes the spray arm to rotate unsmoothly. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a water flow system for a cleaning machine in view of the current status of the prior art, which can automatically discharge a small flow rate through secondary rotation coordination to avoid sediment jamming and improve the rotation stability of the spray arm.

[0006] The second technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned water flow system 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 water flow system for a cleaning machine includes a pump housing and a spray arm, wherein a water outlet is provided on the top of the pump housing, and a water inlet communicated with the water outlet is provided on the bottom wall of the spray arm. The system also includes a water inlet sleeve, a retaining ring and a slip ring. The water inlet sleeve is connected from top to bottom and the lower end is connected with the water outlet of the pump housing. The retaining ring is sleeved on the outer periphery of the water inlet sleeve and is used to constrain the water inlet sleeve on the pump housing. The slip ring is rotatably provided at the water inlet of the spray arm, and a slip ring is formed at the upper end of the water inlet sleeve and is located in the water inlet and rotatably cooperates with the slip ring.

[0009] Preferably, the bottom wall of the spray arm is partially sunken to form a bracket arranged around the periphery of the water inlet, the slip ring is built into the bracket and rotatably cooperates with the bottom wall inside the bracket, the upper part of the water inlet sleeve passes through the water inlet of the spray arm and the slip ring, and the lower surface of the slip ring is rotatably cooperated with the upper surface of the slip ring. The above structure provides an accommodating space for the cooperation of the slip ring and the slip ring, and avoids the cooperation structure protruding from the spray arm flow channel and interfering with the fluid flow.

[0010] Further preferably, the inner diameter of the slip ring is smaller than or equal to the diameter of the water inlet of the spray arm, and in the assembled state, the upper surface of the slip ring is substantially flush with the inner bottom wall of the spray arm.

[0011] Preferably, a convex rib is provided on the inner side wall of the spray arm for limiting the top edge of the sliding ring so as to limit its upward movement. This structure facilitates the assembly of the water inlet sleeve and the clamp ring.

[0012] In the present invention, the outer wall of the slip ring is provided with a plurality of first notches arranged at intervals along the circumferential direction and extending axially through the slip ring, the bottom wall of the slip ring is provided with a plurality of second notches arranged at intervals along the circumferential direction and extending radially through the slip ring, and the outer ends of the second notches are connected to the lower ends of the first notches, an assembly gap is provided between the outer circumferential wall of the water inlet sleeve and the water inlet, and the first notch, the second notch and the assembly gap below the bracket together constitute a leakage channel extending upward and downward. With the above structure, during the operation of the water flow system, due to the high water pressure at the connection between the spray arm and the water outlet of the pump housing, water leakage is prone to occur. The present invention sets a regular leakage channel, and uses a small amount of water leakage to cooperate with the assembly structure to form a lubrication structure. On the one hand, the water leakage can form a water seal at the leakage channel to prevent gas from being inhaled or a large amount of irregular water leakage, thereby improving the sealing performance; on the other hand, the small amount of water that always exists stably in the leakage channel can provide lubrication for the rotation of the spray arm, thereby improving the smoothness and stability of the rotation of the spray arm.

[0013] Preferably, the outer peripheral wall of the sliding ring is provided with a plurality of third notches arranged at intervals along the circumferential direction and penetrating along the axial direction of the sliding ring, and a drainage gap is formed between the third notches and the inner side wall of the bracket. This structure can provide better conditions for uniform water drainage in the circumferential direction.

[0014] To facilitate assembly, the retaining ring is detachably locked on the top wall of the pump casing by means of a snap-on buckle at its bottom. The retaining ring is provided with an assembly set arranged peripherally corresponding to the water outlet of the pump casing. A convex card is provided on the inner wall of the assembly set. Correspondingly, an L-shaped groove that can cooperate with the convex card to limit the position is provided on the outer peripheral wall of the water inlet sleeve.

[0015] In order to improve the sealing performance at the water outlet, a support ring is provided at the lower end of the water inlet sleeve and abuts against the top wall of the outer periphery of the water outlet of the pump housing.

[0016] In the present invention, a water suction port is provided on the bottom wall of the pump casing, and a space guide vane and an impeller are arranged in the pump casing. The space guide vane includes a cover plate and a guide piece. The cover plate is transversely arranged in the middle of the pump casing and divides the inner cavity of the pump casing into relatively independent upper and lower cavities. The water outlet is connected with the upper cavity. There are multiple guide pieces and they are vertically arranged on the lower surface of the cover plate. Multiple guide pieces cover the circumferential area of ​​the cover plate and are arranged at intervals along the circumference. The guide pieces extend spirally inward from the edge of the cover plate against the direction of water flow, and a guide channel is constrained between two adjacent guide pieces. The cover plate portion corresponding to the top of the guide piece is at least partially missing to form a gap for connecting the guide channel with the upper cavity. The impeller is rotatably arranged in the lower cavity, and the bottom of the impeller is provided with an inlet corresponding to the water suction port, and the side is provided with an outlet corresponding to the guide piece. The present invention provides a spatial guide vane and an impeller in the pump casing for axially guiding and pressurizing the axially incoming water and then outputting it axially to meet the water pressure requirements. On this basis, the spray arm is arranged on the pump casing without the need to cooperate with the impeller, thereby improving the stability of the water flow entering the spray arm and thus improving the rotational stability of the spray arm.

[0017] Preferably, the upper surface of the cover plate is provided with straightening blades for gathering water flow from the notch to the water outlet, and the lower edge of the water inlet sleeve is provided with guide ribs that pass downward through the water outlet and extend to the inner ends of each straightening blade. This structure can gather the water flow entering the upper cavity, reduce the energy loss caused by the turbulent contact of the fluid, and maintain a higher water pressure.

[0018] In order to facilitate assembly, a guide cover is provided at the central part of the top wall of the cover plate, the outer edge of which is connected to the inner end of each rectifying blade, and the guide cover has a guide slope with a diameter gradually decreasing from bottom to top, and the lower end of the guide rib abuts against the upper surface of the guide cover. The above structure is conducive to further reducing fluid energy loss.

[0019] A cleaning machine comprises a box body and the above-mentioned water flow system, wherein the pump housing is supported on the inner bottom wall of the box body, and the outer bottom wall of the box body is provided with a driving member, the output shaft of the driving member passes through the bottom wall of the box body and extends into the pump housing to provide water pumping power.

[0020] Compared with the prior art, the advantages of the present invention are: the water inlet sleeve of the present invention forms a secondary rotational fit with the spray arm through an independent slip ring and its own slip ring, that is, the water inlet sleeve can rotate relative to the slip ring, and the slip ring can rotate relative to the spray arm, thereby improving the rotation smoothness of the spray arm; at the same time, since the fitting clearance between the secondary rotational fitting structures is constantly changing, the mud and sand stuck in the assembly clearance can be removed by draining a small amount of water, thereby avoiding mud and sand jamming and further improving the rotation stability of the spray arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Exploded diagram of

[0023] Figure 3 for Figure 1 A cross-sectional view of

[0024] Figure 4 for Figure 3 A magnified view of part A;

[0025] Figure 5 Schematic diagram of the structure of the slip ring in the embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the structure of the space guide vane in an embodiment of the present invention;

[0027] Figure 7 for Figure 6 Schematic diagram from another angle. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings.

[0029] like Figures 1 to 7 As shown, the water flow system for the cleaning machine in this embodiment includes a pump housing 1 and a spray arm 2 . A water outlet 11 is provided on the top of the pump housing 1 , and a water inlet 21 which can be connected to the water outlet 11 is provided on the bottom wall of the spray arm 2 .

[0030] The present embodiment further comprises a water inlet jacket 3, a clamping ring 4 and a slip ring 5. The water inlet jacket 3 is penetrated from top to bottom and the lower end is connected with the water outlet 11 of the pump casing 1. The clamping ring 4 is sleeved on the outer periphery of the water inlet jacket 3 and is used to constrain the water inlet jacket 3 on the pump casing 1. The slip ring 5 is rotatably arranged at the water inlet 21 of the spray arm 2. A slip ring 31 is formed at the upper end of the water inlet jacket 3 and is located in the water inlet 21 and rotatably cooperates with the slip ring 5.

[0031] Specifically, the bottom wall of the spray arm 2 is partially sunken to form a bracket 22 arranged around the periphery of the water inlet 21, the slip ring 5 is built into the bracket 22 and rotatably cooperates with the bottom wall of the bracket 22, the upper part of the water inlet sleeve 3 passes through the water inlet 21 of the spray arm 2 and the slip ring 5, and the lower surface of the slip ring 31 is rotatably cooperated with the upper surface of the slip ring 5. The above structure provides an accommodation space for the cooperation of the slip ring 5 and the slip ring 31, and avoids the cooperation structure protruding from the spray arm flow channel and interfering with the fluid flow.

[0032] In this embodiment, the inner diameter of the sliding ring 5 is less than or equal to the diameter of the water inlet 21 of the spray arm 2. In the assembled state, the upper surface of the sliding ring 31 is substantially flush with the inner bottom wall of the spray arm 2. The inner side wall of the spray arm 2 is provided with a rib 23 for limiting the top edge of the sliding ring 31 and thus limiting its upward movement. This structure facilitates the assembly of the water inlet sleeve 3 and the clamping ring 4.

[0033] In this embodiment, the outer wall of the slip ring 5 is provided with a plurality of first notches 51 which are arranged at intervals along the circumferential direction and pass through the axial direction of the slip ring, and the bottom wall of the slip ring 5 is provided with a plurality of second notches 52 which are arranged at intervals along the circumferential direction and pass through the radial direction of the slip ring, and the outer ends of the second notches 52 are connected with the lower ends of the first notches 51, and there is an assembly gap between the outer circumferential wall of the water inlet jacket 3 and the water inlet 21, and the first notches 51 and the second notches 52 in the bracket 22 and the assembly gap below together constitute a drainage channel from top to bottom. With the above structure, during the operation of the water flow system, due to the high water pressure at the connection between the spray arm 2 and the water outlet 11 of the pump housing 1, water leakage is likely to occur. In this embodiment, a regular leakage channel is provided, and a small amount of leakage water is used in conjunction with the assembly structure to form a lubrication structure. On the one hand, the leakage water can form a water seal at the leakage channel to prevent gas from being inhaled or a large amount of irregular water leakage, thereby improving the sealing performance. On the other hand, the small amount of water that is always stably present in the leakage channel can provide lubrication for the rotation of the spray arm 2, thereby improving the smoothness and stability of the rotation of the spray arm.

[0034] The outer peripheral wall of the sliding ring 31 is provided with a plurality of third notches 311 arranged at intervals along the circumferential direction and penetrating the sliding ring 31 axially, and a drainage gap is formed between the third notches 311 and the inner side wall of the bracket 22. This structure can provide better conditions for uniform water drainage in the circumferential direction.

[0035] In order to facilitate assembly, the snap ring 4 is detachably locked on the top wall of the pump housing 1 through the buckle 100 at the bottom thereof, and the snap ring 4 is provided with an assembly sleeve 41 arranged corresponding to the periphery of the water outlet 11 of the pump housing 1, and a convex clamp 411 is provided on the inner wall of the assembly sleeve 41. Correspondingly, an L-shaped clamping groove 32 capable of cooperating with the convex clamp 411 to limit the position is provided on the outer peripheral wall of the water inlet sleeve 3. In order to improve the sealing performance at the water outlet, a support ring 33 is provided at the lower end of the water inlet sleeve 3 against the top wall of the periphery of the water outlet 11 of the pump housing 1.

[0036] In this embodiment, a water suction port 12 is opened on the bottom wall of the pump housing 1, and a space guide vane 6 and an impeller 7 are arranged in the pump housing 1. The space guide vane 6 includes a cover plate 61 and a guide plate 62. The cover plate 61 is horizontally arranged in the middle of the pump housing 1 and divides the inner cavity of the pump housing 1 into relatively independent upper cavity 101 and lower cavity 102. The water outlet 11 is connected to the upper cavity 101. The guide plate 62 is multiple and vertically arranged on the lower surface of the cover plate 61. The multiple guide plates 62 cover the circumferential area of ​​the cover plate 61 and are arranged along the Arranged at intervals in the circumferential direction, the guide vanes 62 spirally extend inward from the edge of the cover plate 61 against the direction of the water flow, and a guide channel is constrained between two adjacent guide vanes 62. The portion of the cover plate 61 corresponding to the top of the guide vane 62 is at least partially missing to form a gap 103 for the guide channel to communicate with the upper cavity 101; the impeller 7 is a centrifugal impeller, which is rotatably arranged in the lower cavity 102. The bottom of the impeller 7 is provided with an inlet corresponding to the arrangement of the water suction port 12, and the side is provided with an outlet corresponding to the arrangement of the guide vanes 62. In this embodiment, a space guide vane 6 and an impeller 7 are provided in the pump housing 1 for axially guiding and pressurizing the axially inlet water and then axially outputting the water to meet the water pressure requirements. On this basis, the spray arm 2 is provided on the pump housing 1 without the need to cooperate with the impeller, which improves the stability of the water flow entering the spray arm 2 and thus improves the rotation stability of the spray arm.

[0037] The upper surface of the cover plate 61 is provided with a rectifying blade 63 for converging the water flow from the notch 103 to the water outlet 11, and the lower edge of the water inlet sleeve 3 is provided with a guide rib 34 that passes downward through the water outlet 11 and extends to the inner end of each rectifying blade 63. This structure can converge the water flow entering the upper cavity 101, reduce the energy loss caused by the turbulent contact of the fluid, and maintain a higher water pressure.

[0038] In order to facilitate assembly, a guide cover 64 is provided at the central part of the top wall of the cover plate 61, the outer edge of which is connected to the inner end of each rectifying blade 63. The guide cover 64 has a guide slope 641 with a gradually decreasing diameter from bottom to top, and the lower end of the guide rib 34 abuts against the upper surface of the guide cover 63. The above structure is conducive to further reducing fluid energy loss.

[0039] The cleaning machine of this embodiment includes a box body and the above-mentioned water flow system. The pump housing 2 is supported on the inner bottom wall of the box body. The outer bottom wall of the box body is provided with a driving member 8. The output shaft of the driving member 8 passes through the bottom wall of the box body and extends into the pump housing 1 and is connected to the impeller 7 for providing water pumping power.

[0040] The water inlet sleeve 3 of the present embodiment forms a secondary rotational fit with the spray arm 2 through an independent slip ring 5 and its own slip ring 31, that is, the water inlet sleeve 3 can rotate relative to the slip ring 5, and the slip ring 5 can rotate relative to the spray arm 2. The slip ring 5 can be made of a material with a low friction coefficient, thereby improving the smoothness of rotation of the spray arm 2; at the same time, since the fitting clearance between the secondary rotational fitting structures is constantly changing, the leakage channel always exists, and the mud and sand stuck in the assembly clearance can be taken away by a small amount of water leakage, thereby avoiding mud and sand jamming and further improving the rotational stability of the spray arm.

[0041] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A water flow system for a cleaning machine, comprising a pump housing (1) and a spray arm (2), wherein the pump housing (1) has a water outlet (11) at the top, and the spray arm (2) has a water inlet (21) at the bottom wall thereof which can communicate with the water outlet (11), characterized in that: It also comprises a water inlet sleeve (3), a clamping ring (4) and a slip ring (5); the water inlet sleeve (3) is connected from top to bottom and the lower end thereof is connected to the water outlet (11) of the pump housing (1); the clamping ring (4) is sleeved on the outer periphery of the water inlet sleeve (3) and is used to constrain the water inlet sleeve (3) on the pump housing (1); the slip ring (5) is rotatably arranged at the water inlet (21) of the spray arm (2); and a slip ring (31) is formed at the upper end of the water inlet sleeve (3) and is located inside the water inlet (21) and rotatably cooperates with the slip ring (5); The outer wall of the slip ring (5) is provided with a plurality of first notches (51) arranged at intervals along the circumferential direction and extending axially through the slip ring (5); the bottom wall of the slip ring (5) is provided with a plurality of second notches (52) arranged at intervals along the circumferential direction and extending radially through the slip ring (5); the outer ends of the second notches (52) are connected to the lower ends of the first notches (51); an assembly gap is provided between the outer circumferential wall of the water inlet sleeve (3) and the water inlet (21); the bottom wall of the spray arm (2) is partially sunken to form a bracket (22) arranged around the periphery of the water inlet (21); the first notches (51) and the second notches (52) in the bracket (22) and the assembly gap below together form a drainage channel extending upward and downward; The outer peripheral wall of the sliding ring (31) is provided with a plurality of third notches (311) arranged at intervals in the circumferential direction and penetrating the sliding ring (31) axially, and a leakage gap is formed between the third notches (311) and the inner side wall of the bracket (22).

2. The water flow system for a cleaning machine according to claim 1, characterized in that: The slip ring (5) is built into the bracket (22) and is rotatably engaged with the inner bottom wall of the bracket (22); the upper portion of the water inlet sleeve (3) passes through the water inlet (21) of the spray arm (2) and the slip ring (5); and the lower surface of the slip ring (31) is rotatably engaged with the upper surface of the slip ring (5).

3. The water flow system for a cleaning machine according to claim 2, characterized in that: The inner diameter of the sliding ring (5) is smaller than or equal to the diameter of the water inlet (21) of the spray arm (2); in the assembled state, the upper surface of the sliding ring (31) is substantially flush with the inner bottom wall of the spray arm (2).

4. The water flow system for a cleaning machine according to claim 2, characterized in that: The inner side wall of the spray arm (2) is provided with a convex rib (23) for limiting the top edge of the sliding ring (31) and thus restricting its upward movement.

5. The water flow system for a cleaning machine according to any one of claims 1 to 4, characterized in that: The clamping ring (4) is detachably locked on the top wall of the pump housing (1) by means of a buckle at the bottom thereof; the clamping ring (4) is provided with an assembly sleeve (41) arranged at the periphery of a water outlet (11) of the pump housing (1); a convex clamp (411) is provided on the inner wall of the assembly sleeve (41); correspondingly, an L-shaped clamping groove (32) capable of cooperating with the convex clamp (411) for limiting position is provided on the outer peripheral wall of the water inlet sleeve (3).

6. The water flow system for a cleaning machine according to any one of claims 1 to 4, characterized in that: The lower end of the water inlet sleeve (3) is provided with a support ring (33) which abuts against the top wall of the outer periphery of the water outlet (11) of the pump housing (1).

7. The water flow system for a cleaning machine according to any one of claims 1 to 4, characterized in that: A water suction port (12) is provided on the bottom wall of the pump casing (1). A space guide vane (6) and an impeller (7) are arranged in the pump casing (1). The space guide vane (6) comprises a cover plate (61) and a guide vane (62). The cover plate (61) is transversely arranged in the middle of the pump casing (1) and divides the inner cavity of the pump casing (1) into relatively independent upper cavity (101) and lower cavity (102). The water outlet (11) is connected to the upper cavity (101). The guide vane (62) is in plurality and is vertically arranged on the lower surface of the cover plate (61). The plurality of guide vanes (62) cover the cover plate (61). ) in the circumferential area and arranged at intervals along the circumference, the guide vanes (62) spirally extend inward from the edge of the cover plate (61) in the opposite direction of the water flow, a guide channel is constrained between two adjacent guide vanes (62), and the portion of the cover plate (61) corresponding to the top of the guide vane (62) is at least partially missing to form a notch (103) for connecting the guide channel with the upper cavity (101); the impeller (7) is rotatably arranged in the lower cavity (102), and the bottom of the impeller (7) is provided with an inlet corresponding to the arrangement of the water suction port (12), and the side is provided with an outlet corresponding to the arrangement of the guide vanes (62).

8. The water flow system for a cleaning machine according to claim 7, characterized in that: The upper surface of the cover plate (61) is provided with a rectifying blade (63) for gathering water flow from the notch (103) to the water outlet (11), and the lower end edge of the water inlet sleeve (3) is provided with a guide rib (34) which passes downward through the water outlet (11) and extends toward the inner end of each rectifying blade (63).

9. The water flow system for a cleaning machine according to claim 8, characterized in that: A guide cover (64) is provided at the central portion of the top wall of the cover plate (61), the outer edge of which is connected to the inner end of each rectifying blade (63). The guide cover (64) has a guide slope (641) with a diameter gradually decreasing from bottom to top, and the lower end of the guide rib (34) abuts against the upper surface of the guide cover (64).

10. A cleaning machine, comprising a housing, characterized in that: It also includes a water flow system as described in any one of claims 1 to 9, wherein the pump housing (1) is supported on the inner bottom wall of the box body, and the outer bottom wall of the box body is provided with a driving member (8), and the output shaft of the driving member (8) passes through the bottom wall of the box body and extends into the pump housing (1) to provide water pumping power.

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