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, a body is internally provided with a first flow channel and a second flow channel which are relatively independent and locally intersected, and the side wall of the body is provided with a first acceleration hole communicated with the first flow channel and a second acceleration hole communicated with the second flow channel. The first acceleration hole and the second acceleration hole face the same direction but are different from the water inlet in position, and a reversing mechanism capable of controlling the water inlet to be communicated with the first flow channel and the second flow channel or not is further arranged in the body. At the moment when water is injected into the water inlet of the spraying arm and at the moment when the reversing mechanism communicates the first flow channel, stops injecting water into the water inlet and injects water into the water inlet again, the reversing mechanism communicates the second flow channel, and by switching whether the first flow channel and the second flow channel operate or not, the rotating direction of the spraying arm is not changed; the rotating speeds of the spraying arms are different, so that the emphasized spraying range of the spraying arms is adjusted, cleaning dead angles are eliminated, and the cleaning effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher technology, specifically to a spray arm for a cleaning machine and a cleaning machine. Background Technology

[0002] Dishwashers typically include a spray arm that rinses dishes or fruits and vegetables by spraying water jets. For example, Chinese patents CN204813755U ("Dishwasher Spray Arm Base, Dishwasher Spray Arm Device and Dishwasher") and CN209932651U ("A Spray Arm for a Cleaning Machine") disclose the corresponding spray arm structures.

[0003] For the spray arm with the above structure, the water inlet is located on one side wall of the spray arm, and water exits to both sides through this inlet. The spray arm rotates due to the viscous force of the water dispersed in the flow channel. The other side wall of the spray arm has spray holes for spraying water jets. In existing dishwashers, once the dish rack structure is fixed, the position of the dishes on the rack remains constant. However, the water jets sprayed by the spray arm are roughly in a straight line (strip), resulting in a limited spray range. This makes it impossible to cover all surfaces of the dishes, creating cleaning blind spots and affecting the cleaning effect. Furthermore, dishwashers with rectangular washing chambers are also prone to creating cleaning blind spots. Utility Model Content

[0004] The first technical problem to be solved by this utility model is to provide a spray arm for a cleaning machine that can eliminate cleaning dead angles and improve cleaning effect, in light of the current state of the technology.

[0005] The second technical problem to be solved by this utility model is to provide a cleaning machine that has the above-mentioned spray arm, in view of the current situation of the prior art.

[0006] The technical solution adopted by this utility model to solve at least one of the above-mentioned technical problems is as follows:

[0007] A spray arm for a cleaning machine includes a body extending along its length. A water inlet is provided in the central part of the body for water to enter the body. The body has a first flow channel and a second flow channel that are relatively independent but partially intersect. A first acceleration hole communicating with the first flow channel and a second acceleration hole communicating with the second flow channel are provided on the side wall of the body. The first acceleration hole and the second acceleration hole have the same orientation but different positions from the water inlet. The body also has a reversing mechanism that can control whether the water inlet is connected to the first flow channel and the second flow channel.

[0008] With the above structure, at the moment water is injected into the inlet of the spray arm, the reversing mechanism connects the first flow channel. At the moment water injection stops and water is injected into the inlet again, the reversing mechanism connects the second flow channel. By switching whether the first and second flow channels are running, the rotation direction of the spray arm remains unchanged. However, as the lever arm length of the acceleration hole from the center of the body is different, the rotation speed of the spray arm is different, thereby adjusting the focus spraying range of the spray arm, eliminating cleaning dead angles, and improving the cleaning effect.

[0009] Preferably, at least a portion of the first flow channel is arranged side-by-side with the second flow channel, the first acceleration hole is located on the outer wall of the first flow channel, and the second acceleration hole is located on the side wall of the second flow channel near the first flow channel. This structure allows for switching between the flow channels and corresponding acceleration holes to maintain the direction of the spray arm while adjusting its rotation speed, thereby improving the cleaning effect.

[0010] Preferably, the first and second flow channels are arranged in an X-shaped structure that intersects in the middle. The intersection of the X-shaped structure connects to the water inlet, and two extension arms located on the sides of the intersection are arranged side by side. With this structure, acceleration holes can be started on the sidewalls of each extension arm to better control the acceleration effect.

[0011] Preferably, the main body has a through-hole 'a' between the two parallel extension arms corresponding to the X-shaped structure. The first acceleration hole is located on the outer wall of the main body and communicates with the first flow channel, while the second acceleration hole is located on the side wall of the through-hole 'a' and communicates with the second flow channel. With this structure, acceleration holes can be created on the side wall of each extension arm to better control the acceleration effect.

[0012] Preferably, the lateral distance from the first acceleration hole to the water inlet is d, and the lateral distance from the second acceleration hole to the water inlet is d1 = (0.5~0.9)d. This distance can be adjusted according to production needs to control the rotational speed of the spray arms under different flow channels.

[0013] Preferably, the water inlet is located in the center of the bottom wall of the main body, and the center of the main body is provided with a water distribution cavity that extends upward from the water inlet, and the reversing mechanism is located in the water distribution cavity.

[0014] Preferably, the reversing mechanism includes a water distribution component, which is floatably disposed in the water distribution cavity and is used to rotate at a certain angle at the moment of water injection to connect the water inlet with the first flow channel or the second flow channel.

[0015] A cleaning machine includes a housing and the aforementioned spray arm, which is rotatably disposed within the housing.

[0016] Compared with the prior art, the advantages of this utility model are as follows: This utility model sets up a first flow channel, a second flow channel, and a reversing mechanism that are relatively independent but partially intersecting in the main body. At the moment when water is injected into the inlet of the spray arm, the reversing mechanism connects the first flow channel. At the moment when water is stopped being injected into the inlet and water is injected into the inlet again, the reversing mechanism connects the second flow channel. By switching whether the first flow channel and the second flow channel are running, the rotation direction of the spray arm remains unchanged. However, as the lever arm length of the acceleration hole from the center of the main body is different, the rotation speed of the spray arm is different, thereby adjusting the focus spraying range of the spray arm, eliminating cleaning dead angles, and improving the cleaning effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the spray arm in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Top view;

[0019] Figure 3 for Figure 1 Partial exploded view;

[0020] Figure 4 for Figure 1 Further breakdown diagram;

[0021] Figure 5 for Figure 1 A sectional view;

[0022] Figure 6 This is another exploded view of an embodiment of the present invention. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1-6 As shown, the spray arm for the cleaning machine in this embodiment includes a body 1 extending along the length direction. A water inlet 13 is provided in the central part of the body 1 to supply water into the body 1. A first flow channel 11 and a second flow channel 12 that are relatively independent and partially intersect are provided in the body 1. Spray holes 100 that are connected to the first flow channel 11 and the second flow channel 12 are respectively provided on the top wall of the body 1.

[0025] The side wall of the main body 1 is provided with a first acceleration hole 111 that communicates with the first flow channel 11 and a second acceleration hole 121 that communicates with the second flow channel 12. The first acceleration hole 111 and the second acceleration hole 121 have the same orientation but different positions from the water inlet 13. The main body 1 is also provided with a reversing mechanism that can control whether the water inlet 13 is connected to the first flow channel 11 and the second flow channel 12.

[0026] With the above structure, at the moment water is injected into the inlet 13 of the spray arm, the reversing mechanism connects the first flow channel 11. At the moment water injection into the inlet 13 stops and water injection into the inlet 13 resumes, the reversing mechanism connects the second flow channel 12. By switching whether the first flow channel 11 and the second flow channel 12 are running, the rotation direction of the spray arm remains unchanged. However, as the lever arm length of the acceleration hole from the center of the body 1 is different, the rotation speed of the spray arm is different, thereby adjusting the focus spraying range of the spray arm, eliminating cleaning dead angles, and improving the cleaning effect.

[0027] At least a portion of the first flow channel 11 is arranged side-by-side with the second flow channel 12. A first acceleration hole 111 is formed on the outer wall of the first flow channel 11, and a second acceleration hole 121 is formed on the side wall of the second flow channel 12 near the first flow channel 11. This structure allows the spray arm to maintain a constant direction of rotation and adjust its speed by switching the flow channels and corresponding acceleration holes, thereby improving the cleaning effect.

[0028] The first flow channel 11 and the second flow channel 12 are arranged in an X-shaped structure that intersects in the middle. The intersection of the X-shaped structure connects to the inlet 13, and two extension arms located on the sides of the intersection are arranged side by side. With this structure, acceleration holes can be started on the sidewall of each extension arm to better control the acceleration effect.

[0029] The main body 1 has a through-hole 'a' between the two parallel extension arms corresponding to the X-shaped structure. A first acceleration hole 111 is formed on the outer wall of the main body 1 and communicates with the first flow channel 11. A second acceleration hole 121 is formed on the side wall of the through-hole 'a' and communicates with the second flow channel 12. With this structure, acceleration holes can be formed on the side wall of each extension arm to better control the acceleration effect.

[0030] The lateral distance from the first acceleration hole 111 to the water inlet 13 is d, and the lateral distance from the second acceleration hole 121 to the water inlet 13 is d1 = (0.5~0.9)d. This distance can be adjusted according to production needs to control the rotational speed of the spray arms under different flow channels.

[0031] In this embodiment, the water inlet 13 is located at the center of the bottom wall of the main body 1, and a water distribution cavity 14 extending upward from the water inlet 13 is provided at the center of the main body 1. The reversing mechanism is located in the water distribution cavity 14. A water distribution component 2 is provided in the water distribution cavity 14, which can rotate at a certain angle at the moment of water injection to connect the water inlet 13 with the first flow channel 11 or the second flow channel 12.

[0032] The side wall of the water distribution component 2 is provided with a guide port 21 for water in the water distribution chamber 14 to enter the first flow channel 11 or the second flow channel 12. The water distribution chamber 14 is provided with a limiting structure that can circumferentially limit the water distribution component 2 when it is connected to the first flow channel 11 or the second flow channel 12. With the above structure, it is easy to maintain the corresponding state when the first flow channel or the second flow channel is connected to the water distribution chamber, and maintain the stability of the fluid flow.

[0033] The water distribution component 2 includes a water guide sleeve, which is closed at the upper end and open at the lower end, forming a water inlet 22 corresponding to the water inlet 13. This structure is used to ensure that the water intake at the water inlet and the water delivery at the water guide sleeve are always stable.

[0034] A guide cone 24 protrudes downward from the center of the inner top wall of the water guide sleeve, which disperses the incoming water circumferentially. The tip of the guide cone 24 is arranged facing the inlet 22. With the above structure, the water flow can be guided to the inlet of the flow channel in a timely manner, thereby reducing the energy loss of the water flow in the water distribution chamber and increasing the head.

[0035] The limiting structure of this embodiment includes a protruding post 23 disposed on the outer peripheral wall of the water distribution component 2 and a limiting groove 15 arranged circumferentially on the inner wall of the water distribution cavity 14. The protruding post 23 is movably constrained in the limiting groove 15. This structure facilitates the guidance of the rotation of the water distribution component 2 and the positioning of the water distribution component 2 in the cleaning state through the cooperation of the protruding post 23 and the limiting groove 15, so as to achieve smooth switching of the spray arm flow channel.

[0036] The upper edge of the limiting groove 15 is serrated and includes multiple interconnected first teeth 151. The lower edge of the limiting groove 15 is serrated and includes multiple interconnected second teeth 152. The tips of the second teeth 152 are arranged corresponding to the tooth surfaces of the first teeth 151. Along the rotation direction of the water distribution component 2, the slope of the first tooth surface 1511 of the first tooth 151 is greater than the slope of the second tooth surface 1512, the slope of the third tooth surface 1521 of the second tooth 152 is greater than the slope of the fourth tooth surface 1522, and the tips of the second teeth 152 are arranged corresponding to the second tooth surface 1512 of the first tooth 151. With the above structure, the protruding post 23, in the state of floating up and down with the water distribution component 2, can easily cooperate with the corresponding tooth surfaces and grooves to achieve circumferential guidance or vertical limiting.

[0037] In this embodiment, along the rotation direction of the water separator 2, between two adjacent first teeth 151, a first limiting region 001 is formed between the end of the second tooth surface 1512 of the upstream first tooth 151 and the starting end of the first tooth surface 1511 of the downstream first tooth 151, which can limit the protrusion 23 after the water separator 2 has floated up. The fourth tooth surface 1522 of the second tooth 152, corresponding to the first limiting region 001, forms a first guide surface that can drive the water separator 2 to rotate circumferentially through a certain angle when the water separator 2 is falling. The second tooth surface 1512 of the first tooth 151, corresponding to the first guide surface, forms a second guide surface that can drive the water separator 2 to rotate circumferentially through a certain angle when the water separator 2 is floating up. A second limiting region 002 is formed between the end of the second guide surface of the first tooth 151 and the starting end of the first tooth surface 1511 of the downstream first tooth 151, which can limit the protrusion 23 after the water separator 2 has floated up again. Using the above structure, at the moment water is first introduced through the inlet 13, the water distributor 2 floats upward due to the water intake. During this process, the protrusion 23 rotates and floats upward under the guidance of the corresponding tooth surface until it enters the first limiting area 001. At this time, the protrusion 23 is limited, and the water distributor 2 is temporarily positioned, that is, no vertical or circumferential displacement occurs, and the first flow channel 11 is connected to the water distribution chamber 14. When the water inlet 13 stops supplying water, the water distributor 2 falls under the action of gravity due to the absence of water flow impact and buoyancy. The column 23 falls downward onto the first guide surface. After rotating a certain angle circumferentially in the first guide surface state, it is temporarily limited to the end of the first guide surface. At the moment when water is introduced through the inlet 13 again, the water distributor 2 floats up due to the water intake. During this process, the column 23 rotates and floats up under the guidance of the second guide surface until it enters the second limiting area 002. At this time, the column 23 is limited, and the water distributor 2 is temporarily positioned, that is, no vertical or circumferential displacement occurs. The second flow channel 12 is connected to the water distribution cavity 14. In this embodiment, the staggered tooth structure, combined with the buoyancy of the water intake and the weight of the water distributor 2, drives the water distributor 2 to rotate a certain angle circumferentially before automatically limiting its position. The structure is simple, easy to implement, and convenient to operate.

[0038] When the protruding post 23 is constrained in the first limiting region 001, the inlet 13, the water distribution chamber 14, the water guide 21, and the first flow channel 11 are connected to form a first water supply channel that can cooperate with the first acceleration hole 111. When the protruding post 23 is constrained in the second limiting region 002, the inlet 13, the water distribution chamber 14, the water guide 21, and the second flow channel 12 are connected to form a second water supply channel that can cooperate with the second acceleration hole 121. In this embodiment, by utilizing the cooperation between the water distribution component 2 and the limiting structure, the switching of the spray arm flow channel is achieved by controlling the on / off state of water injection, which is beneficial to expanding the spray range and improving the cleaning effect.

[0039] In this embodiment, along the water flow direction, the water distribution cavity 14, the water distribution component 2, and the flow channel input end connected to the water distribution cavity 14 together constrain the water flow path that extends axially along the water distribution cavity 14 and then bends laterally at the water distribution component 2 before directly entering the flow channel. This water flow path does not have circumferential bends in the water distribution cavity 14, shortening the bend stroke of the water flow, reducing disturbance and resistance to the water flow, thereby effectively reducing fluid energy loss and improving the water delivery head and cleaning effect.

[0040] The upper part of the water distribution chamber 14, corresponding to the first flow channel 11 and the second flow channel 12, is provided with a fitting 4 for constraining the side wall of the water distribution chamber 14. The fitting 4 is vertically continuous and has openings 41 on its side wall corresponding to the inlets of each flow channel. The water distribution component 2 is movably fitted into the fitting 4. The above structure facilitates the production, manufacturing, and assembly of the spray arm body, water distribution structure, etc.

[0041] The first tooth 151 of the limiting structure is formed at the lower edge of the assembly 4, and the second tooth 152 is formed on the inner wall surface of the lower part of the water distribution cavity 14. This structure facilitates assembly, improves the compactness between the components after assembly, and thus improves the reliability and stability of the vertical movement of the water distribution component.

[0042] To facilitate the installation of the assembly 4, the edge of the assembly 4 is provided with a vertically extending retaining edge 42. Correspondingly, the body 1 has retaining ribs 17 at the end edges of each flow channel that can hold the retaining edge 42 therein and thus limit the position of the assembly 4.

[0043] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" 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 extending along its length, wherein a water inlet is provided at the center of the body for water to enter the body, characterized in that: The main body is provided with a first flow channel and a second flow channel that are relatively independent and partially intersect. The side wall of the main body is provided with a first acceleration hole that communicates with the first flow channel and a second acceleration hole that communicates with the second flow channel. The first acceleration hole and the second acceleration hole have the same orientation but different distances from the water inlet. The main body is also provided with a reversing mechanism that can control whether the water inlet (13) is connected to the first flow channel (11) and the second flow channel (12).

2. The spray arm for a cleaning machine according to claim 1, characterized in that: At least a portion of the first flow channel is arranged side by side with the second flow channel, the first acceleration hole is opened on the outer side wall of the first flow channel, and the second acceleration hole is opened on the side wall of the second flow channel near the first flow channel.

3. The spray arm for a cleaning machine according to claim 2, characterized in that: The first and second flow channels are arranged in an X-shaped structure that intersects in the middle. The intersection of the X-shaped structure is connected to the water inlet, and two extended arms located on the side of the intersection are arranged side by side.

4. The spray arm for a cleaning machine according to claim 3, characterized in that: The main body has a through-hole a between two parallel extended arms corresponding to the X-shaped structure. The first acceleration hole is opened on the outer wall of the main body and is connected to the first flow channel. The second acceleration hole is opened on the side wall of the through-hole a and is connected to the second flow channel.

5. The spray arm for a cleaning machine according to any one of claims 1 to 4, characterized in that: The lateral distance from the first acceleration hole to the water inlet is d, and the lateral distance from the second acceleration hole to the water inlet is d1 = (0.5~0.9)d.

6. The spray arm for a cleaning machine according to any one of claims 1 to 4, characterized in that: The water inlet (13) is located in the center of the bottom wall of the main body (1), and a water distribution cavity (14) is provided in the center of the main body, which extends upward from the water inlet. The reversing mechanism is located in the water distribution cavity.

7. The spray arm for a cleaning machine according to claim 6, characterized in that: The reversing mechanism includes a water distribution component, which is floatably disposed in the water distribution chamber and is used to rotate at a certain angle at the moment of water injection to connect the water inlet with the first flow channel or the second flow channel.

8. The spray arm for a cleaning machine according to claim 7, characterized in that: The side wall of the water distribution component is provided with a water guide port for water in the water distribution chamber to enter the first flow channel or the second flow channel. The water distribution chamber is provided with a limiting structure that can circumferentially limit the water distribution component when it is connected to the first flow channel or the second flow channel.

9. A cleaning machine, comprising a housing, characterized in that: It also includes a spray arm as described in any one of claims 1 to 8, wherein the spray arm is rotatably disposed in the housing.

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