Spraying arm for cleaning machine and cleaning machine

Abstract

The utility model relates to a spraying arm for a cleaning machine and the cleaning machine, the spraying arm comprises a body, the side wall of the body is provided with an acceleration hole arranged close to the end part of the body, the bottom of the body is provided with an inclined nozzle communicated with a flow channel, the inclined nozzle is rotatably connected to the bottom wall of the body, and the direction of the inclined nozzle is consistent with that of the acceleration hole in a non-cleaning state. The bottom of the body is further provided with a driving structure capable of driving the inclined nozzles to rotate along with rotation of the spraying arms in the cleaning state. The inclined nozzle capable of accelerating the spraying arm by spraying water flow is arranged at the bottom of the spraying arm, in an initial state, the orientation of the inclined nozzle is in a maximum acceleration state, and along with rotation of the spraying arm, the driving structure drives the inclined nozzle to rotate, so that the acceleration effect of the inclined nozzle is reduced, and the spraying effect is improved. And the reduction degree of the acceleration effect is automatically adjusted along with the rotating speed of the spraying arm, so that the self-adaption of the rotating speed of the spraying arm is realized, the rotating speed stability is improved, and the cleaning effect is favorably improved.

Description

Technical Field

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

[0002] As people's living standards improve, dishwashers, as a kitchen appliance, are increasingly entering households. Spray arms are provided in dishwashers to spray water onto the surface of tableware to achieve large-area spray cleaning.

[0003] The "Spray Arm and Cleaning Machine for Cleaning Machine" (application number: CN202222667424.6) with authorization announcement number CN218684284U discloses a structure including a spray arm body, on which a water spray hole and a guide sleeve extending from the edge of the water spray hole in the direction of water flow are provided, the middle part of the guide sleeve contracts radially to form a contraction part with a reduced inner diameter, and a suction hole connected to the contraction part is provided on the side wall of the guide sleeve. The above scheme utilizes the contraction part of the guide sleeve to generate local negative pressure, thereby sucking air into the water column through the suction hole, so that bubbles are entrained in the sprayed water flow, and when the water flow with bubbles is sprayed toward the dishes, the bubbles in the water flow contact the dishes and burst and generate a large impact force, thereby dispersing the stubborn dirt on the dishes or fruits and vegetables, and achieving a better cleaning effect.

[0004] However, the rotation speed of the above-mentioned spray arm is controlled by the viscosity of the water flow. For a cleaning machine using an open water pump, the rotation speed of the spray arm is often too fast and unstable due to the large water suction power. The existing technology usually adopts a method of opening a constant deceleration hole and reducing the rotation speed of the spray arm by discharging the flow. However, since the direction of the deceleration hole is constant, it cannot be adjusted according to the speed of the spray arm. As a result, although the speed of the spray arm is reduced, there is still a problem of unstable rotation, which greatly affects the cleaning effect. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide a spray arm for a cleaning machine which can realize self-adaptation of rotation speed and improve rotation speed stability and cleaning effect in view of the current status of the prior art.

[0006] The second technical problem to be solved by the utility model 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 utility model to solve at least one of the above technical problems is:

[0008] A spray arm for a cleaning machine comprises a body, the interior of the body is hollow to form a flow channel extending in the length direction, the top wall of the body is provided with a plurality of water spray holes connected to the flow channel, the central part of the bottom wall of the body is provided with a water inlet connected to the flow channel, the side wall of the body is provided with an acceleration hole arranged near the end of the body, the bottom of the body is provided with an inclined nozzle connected to the flow channel, the inclined nozzle is rotatably connected to the bottom wall of the body and is consistent with the direction of the acceleration hole in a non-cleaning state, and the bottom of the body is also provided with a driving structure that can drive the inclined nozzle to rotate as the spray arm rotates in a cleaning state.

[0009] Preferably, the driving structure includes a slider that can move toward the end of the spray arm under the action of centrifugal force as the spray arm rotates, and a first elastic member that keeps the slider in a reset trend, and the slider is connected to the inclined nozzle. During the rotation of the spray arm, the slider is subjected to different centrifugal forces as the rotation speed of the spray arm is different; when the spray arm rotates too fast, the slider is subjected to a large centrifugal force and a large displacement occurs, driving the inclined nozzle to rotate circumferentially at a large angle, thereby greatly eliminating the acceleration effect of the water column sprayed by the inclined nozzle; when the rotation speed of the spray arm is fast, the centrifugal force on the slider is reduced, and under the action of the first elastic member, the slider is less displaced toward the end relative to the initial state, driving the inclined nozzle to rotate circumferentially at a small angle, thereby slightly eliminating the acceleration effect of the water column sprayed by the inclined nozzle; in the above manner, the spray arm is adaptively adjusted according to its real-time rotation speed.

[0010] Preferably, the slider is provided with a rack extending toward the end of the body, and the outer periphery of the inclined nozzle is provided with a gear ring that can mesh with the rack for transmission. Preferably, the rack is located between the inclined nozzle and the acceleration hole, and the teeth of the rack are located on the side wall thereof close to the inclined nozzle. The above structure facilitates the driving of the inclined nozzle.

[0011] Preferably, a guide column is provided on the bottom wall of the body, which is located between the water inlet and the inclined nozzle and extends along the length direction of the body. The slider is provided with a guide hole that can be sleeved on the outer periphery of the guide column and cooperate with the guide column for reciprocating movement. The first elastic member is provided on the side of the slider close to the inclined nozzle. Preferably, a first limiting edge is provided at the end of the guide column close to the inclined nozzle, and the first elastic member is elastically compressed between the first limiting edge and the side wall of the slider facing the inclined nozzle. The above structure facilitates the guidance of the movement of the slider, improves the stability of the movement of the slider, and facilitates the reliable installation of the first elastic member.

[0012] Preferably, the guide posts are in two groups and are arranged at intervals in the width direction of the body, and a gap for the rack to pass through is formed between the first limiting edges at the ends of the two guide posts.

[0013] Preferably, the end of the guide column close to the water inlet is provided with a second limiting edge, and a second elastic member capable of buffering the movement of the slider toward the water inlet is provided between the second limiting edge and the side wall of the slider facing the water inlet. As the rotation speed of the spray arm changes in real time, the slider may move toward the water inlet to reduce the rotation angle of the inclined nozzle. In this process, the second elastic member can provide buffering for the retraction action of the slider to prevent it from being displaced too much instantly and causing instability in the self-adjustment process of the spray arm rotation speed.

[0014] Preferably, a mounting hole for mounting the inclined nozzle is provided on the bottom wall of the body, the upper part of the inclined nozzle is rotatably constrained in the mounting hole, and the gear ring is provided on the outer peripheral wall of the middle part of the inclined nozzle and extends radially thereof. The mounting hole can be provided with an internal thread, and the outer periphery of the upper part of the inclined nozzle is provided with an external thread, and the two are connected by threaded matching, which can be both axially constrained and circumferentially rotated.

[0015] Preferably, the inclined nozzle comprises a first section, a second section and a third section connected in sequence along the water flow direction, the first section is a tapered section whose inner diameter decreases along the water flow direction, the second section is a straight section, and the third section is an arc section bent to one side. This structure can reduce the impact on the flow state of the water flow in the flow channel while achieving the discharge.

[0016] Preferably, an acceleration hole is respectively provided on two opposite side walls of the body, and correspondingly, an inclined nozzle and a driving structure respectively arranged corresponding to the acceleration holes are provided at the bottom of the body. This structure is conducive to improving the rotation stability of the spray arm.

[0017] A cleaning machine comprises a box body, a concave water return area is arranged at the bottom of the box body, a filter plate is arranged at the top of the water return area, and also comprises the above-mentioned spray arm, which is rotatably arranged in the box body and located above the filter plate, and a water pump is arranged in the water return area for pumping water in the water return area into the spray arm through a water inlet.

[0018] Compared with the prior art, the utility model has the following advantages: the utility model is provided with an inclined nozzle at the bottom of the spray arm which can accelerate the spray arm by spraying water; in the initial state, the direction of the inclined nozzle is in the maximum acceleration state; as the spray arm rotates, the driving structure drives the inclined nozzle to rotate, thereby reducing the acceleration effect of the inclined nozzle; and the degree of reduction of the acceleration effect is automatically adjusted with the rotation speed of the spray arm, thereby realizing the self-adaptation of the rotation speed of the spray arm, improving the rotation speed stability, and being beneficial to improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the spray arm of an embodiment of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the bottom structure;

[0021] Figure 3 It is a cross-sectional view of a spray arm according to an embodiment of the utility model;

[0022] Figure 4 for Figure 3 A partial enlarged view of . DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] like Figures 1 to 4 As shown, the spray arm for a cleaning machine in this embodiment includes a main body 1, which is hollow inside to form a flow channel 11 extending along the length direction, a top wall of the main body 1 is provided with a plurality of water spray holes 12 connected to the flow channel 11, and a central portion of the bottom wall of the main body 1 is provided with a water inlet 13 connected to the flow channel 11.

[0025] The side wall of the main body 1 is provided with an acceleration hole 14 arranged near the end of the main body 1. The bottom of the main body 14 is provided with an inclined nozzle 2 connected to the flow channel 11. The inclined nozzle 2 is rotatably connected to the bottom wall of the main body 1 and is consistent with the direction of the acceleration hole 14 in the non-cleaning state. The bottom of the main body 1 is also provided with a driving structure 3 that can drive the inclined nozzle 2 to rotate as the spray arm rotates in the cleaning state.

[0026] The driving structure 3 includes a slider 31 that can move toward the end of the spray arm under the action of centrifugal force as the spray arm rotates, and a first elastic member 32 that keeps the slider 31 in a reset trend. The slider 31 is connected to the inclined nozzle 2. The slider 31 is provided with a rack 311 extending toward the end of the body 1, and the outer periphery of the inclined nozzle 2 is provided with a gear ring 21 that can mesh with the rack 311 for transmission. The rack 311 is located between the inclined nozzle 2 and the acceleration hole 14, and the teeth of the rack 311 are located on the side wall thereof close to the inclined nozzle 2. The above structure facilitates the driving of the inclined nozzle 2.

[0027] During the rotation of the spray arm, the centrifugal force applied to the slider 31 varies with the rotation speed of the spray arm. When the spray arm rotates too fast, the slider 31 is subjected to a large centrifugal force and undergoes a large displacement, driving the inclined nozzle 2 to rotate circumferentially at a large angle, thereby significantly eliminating the acceleration effect of the water column sprayed by the inclined nozzle 2. When the rotation speed of the spray arm is relatively fast, the centrifugal force applied to the slider 31 is reduced. Under the action of the first elastic member 32, the displacement of the slider 31 toward the end relative to the initial state is relatively small, driving the inclined nozzle 2 to rotate circumferentially at a small angle, thereby slightly eliminating the acceleration effect of the water column sprayed by the inclined nozzle 2. In the above manner, the spray arm is adaptively adjusted according to its real-time rotation speed.

[0028] The bottom wall of the body 1 is provided with a guide column 15 located between the water inlet 13 and the inclined nozzle 2 and extending along the length direction of the body 1. The slider 31 is provided with a guide hole 312 that can be sleeved on the outer periphery of the guide column 15 and reciprocatingly cooperate with the guide column 15. The first elastic member 32 is provided on the side of the slider 31 close to the inclined nozzle 2. The end of the guide column 15 close to the inclined nozzle 2 is provided with a first limiting edge 151, and the first elastic member 32 is elastically compressed between the first limiting edge 151 and the side wall of the slider 31 facing the inclined nozzle 2. The above structure facilitates the guidance of the movement of the slider 31, improves the stability of the movement of the slider 31, and facilitates the reliable installation of the first elastic member 32.

[0029] The guide posts 15 are divided into two groups and arranged at intervals in the width direction of the body 1. A notch 150 is formed between the first limiting edges 151 at the ends of the two guide posts 15 for the rack 311 to pass through. A second limiting edge 152 is provided at the end of the guide post 15 close to the water inlet 13. A second elastic member 33 capable of buffering the movement of the slider 31 toward the water inlet 13 is provided between the second limiting edge 152 and the side wall of the slider 31 facing the water inlet 13. With the real-time change of the rotation speed of the spray arm, the slider 31 may move toward the water inlet 13 to reduce the rotation angle of the inclined nozzle 2. In this process, the second elastic member 33 can provide buffering for the retraction action of the slider 31 to prevent it from being displaced too much instantly and causing instability in the self-adjustment process of the spray arm rotation speed.

[0030] The bottom wall of the body 1 is provided with a mounting hole 16 for mounting the inclined nozzle 2. The upper portion of the inclined nozzle 2 can be rotatably constrained in the mounting hole 16. The gear ring 21 is provided on the outer peripheral wall of the middle portion of the inclined nozzle 2 and extends radially thereof. The mounting hole 16 can be provided with an internal thread, and the outer periphery of the upper portion of the inclined nozzle 2 is provided with an external thread. The two are connected by threaded matching, and can be both axially constrained and circumferentially rotated.

[0031] The inclined nozzle 2 includes a first section 201, a second section 202, and a third section 203 which are connected in sequence along the water flow direction. The first section 201 is a tapered section whose inner diameter decreases along the water flow direction, the second section 202 is a straight section, and the third section 203 is an arc section bent to one side. This structure can reduce the impact on the flow state of the water flow in the flow channel while achieving the discharge.

[0032] An acceleration hole 14 is respectively provided on two opposite side walls of the body 1, and correspondingly, an inclined nozzle 2 and a driving structure 3 are respectively arranged corresponding to the corresponding acceleration holes 14 at the bottom of the body 1. This structure is conducive to improving the rotation stability of the spray arm.

[0033] The cleaning machine of this embodiment includes a box body, a concave return water area is arranged at the bottom of the box body, a filter plate is arranged on the top of the return water area, and also includes the above-mentioned spray arm, which is rotatably arranged in the box body and located above the filter plate, and a water pump is arranged in the return water area for pumping water in the return water area into the spray arm through a water inlet.

[0034] 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 body (1), the body (1) being hollow inside to form a flow channel (11) extending in the length direction, the top wall of the body (1) being provided with a plurality of water spray holes (12) connected to the flow channel (11), the central portion of the bottom wall of the body (1) being provided with a water inlet (13) connected to the flow channel (11), characterized in that: The side wall of the body (1) is provided with an acceleration hole (14) arranged near the end of the body (1); the bottom of the body (1) is provided with an inclined nozzle (2) connected to the flow channel; the inclined nozzle (2) is rotatably connected to the bottom wall of the body (1) and is aligned with the direction of the acceleration hole (14) in a non-cleaning state; the bottom of the body (1) is also provided with a driving structure (3) that can drive the inclined nozzle (2) to rotate as the spray arm rotates in a cleaning state.

2. The spray arm for a cleaning machine according to claim 1, characterized in that: The driving structure (3) comprises a slider (31) which can move towards the end of the spray arm under the action of centrifugal force as the spray arm rotates, and a first elastic member (32) which enables the slider (31) to maintain a reset tendency. The slider (31) is connected to the inclined nozzle (2).

3. The spray arm for a cleaning machine according to claim 2, characterized in that: The slider (31) is provided with a rack (311) extending toward the end of the body (1), and the outer periphery of the inclined nozzle (2) is provided with a gear ring (21) capable of meshing with the rack (311) for transmission.

4. The spray arm for a cleaning machine according to claim 3, characterized in that: The rack (311) is located between the inclined nozzle (2) and the acceleration hole (14), and the teeth of the rack (311) are located on the side wall thereof close to the inclined nozzle (2).

5. The spray arm for a cleaning machine according to claim 2, characterized in that: The bottom wall of the body (1) is provided with a guide column (15) located between the water inlet (13) and the inclined nozzle (2) and extending along the length direction of the body (1); the slider (31) is provided with a guide hole (312) which can be sleeved on the outer periphery of the guide column (15) and can be reciprocated with the guide column (15); the first elastic member (32) is provided on a side of the slider (31) close to the inclined nozzle (2).

6. The spray arm for a cleaning machine according to claim 5, characterized in that: The end of the guide column (15) close to the inclined nozzle (2) is provided with a first limiting edge (151), and the first elastic member (32) is elastically compressed between the first limiting edge (151) and the side wall of the sliding block (31) facing the inclined nozzle (2).

7. The spray arm for a cleaning machine according to claim 6, characterized in that: The guide posts (15) are in two groups and are arranged at intervals in the width direction of the body (1). A notch (150) for the rack (311) to pass through is formed between the first limiting edges (151) at the ends of the two guide posts (15).

8. The spray arm for a cleaning machine according to claim 6, characterized in that: The end of the guide column (15) close to the water inlet (13) is provided with a second limiting edge (152), and a second elastic member (33) capable of providing a buffer when the slider (31) moves toward the water inlet (13) is provided between the second limiting edge (152) and the side wall of the slider (31) facing the water inlet (13).

9. The spray arm for a cleaning machine according to claim 3, characterized in that: The bottom wall of the body (1) is provided with a mounting hole (16) for mounting the inclined nozzle (2); the upper portion of the inclined nozzle (2) is rotatably restrained in the mounting hole (16); and the gear ring (21) is arranged on the outer peripheral wall of the middle portion of the inclined nozzle (2) and extends radially thereof.

10. The spray arm for a cleaning machine according to claim 9, characterized in that: The inclined nozzle (2) comprises a first section (201), a second section (202), and a third section (203) which are connected in sequence along the direction of water flow, the first section (201) being a conical section whose inner diameter decreases along the direction of water flow, the second section (202) being a straight section, and the third section (203) being an arc section bent to one side.

11. The spray arm for a cleaning machine according to any one of claims 1 to 8, characterized in that: An acceleration hole (14) is respectively provided on two opposite side walls of the main body (1), and correspondingly, an inclined nozzle (2) and a driving structure (3) arranged corresponding to the corresponding acceleration holes (14) are provided at the bottom of the main body (1).

12. 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 provided at the top of the water return area, characterized in that: It also includes a spray arm as described in any one of claims 1 to 11, which is rotatably arranged in the box and located above the filter plate, and a water pump is arranged in the return water area to pump water in the return water area into the spray arm through a water inlet (13).

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