Spray arm for a dishwasher and dishwasher

Abstract

The utility model relates to a kind of spray arm and cleaning machine for cleaning machine, including the body extending along length direction, the water inlet is opened in the bottom of the body, the top is opened with spray hole, the flow passage extending along its length direction is formed in the hollow inside body, the water inlet is located in the central part of the bottom of body, flow passage gradually increases in width, gradually becomes small in thickness from water inlet to its end part, the top wall of the body is opened with several spray holes being connected with flow passage, and the number of the spray hole gradually increases from water inlet to its end part. The flow passage in the spray arm body is set to gradually widen structure from center to end part, and in order to balance water flow and lift, the flow passage is set to gradually thin structure from center to end part, to make up the energy loss in flow passage widening and water flow conveying process, keep larger water pressure, on this basis, increase the spray hole close to the end part of spray arm, to improve spray coverage, eliminate cleaning dead angle, improve cleaning effect.

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] The existing spray arms typically use straight flow channels. Due to the limitations of the number of spray channels and nozzles, as well as the head, the range of water jets from the nozzles is limited, making it difficult to cover the surface of all tableware, resulting in cleaning dead zones and affecting the cleaning effect.

[0004] Therefore, the spray arm structure currently used in cleaning machines needs further improvement. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to provide a spray arm for a cleaning machine that can improve the spray coverage, thereby eliminating cleaning dead corners and improving the cleaning effect, in light of the current state of the technology.

[0006] The second technical problem to be solved by this utility model is to provide a cleaning machine with the above-mentioned spray arm, in view of the current situation of the prior art.

[0007] The technical solution adopted by this utility model to solve at least one of the above-mentioned technical problems is as follows:

[0008] A spray arm for a cleaning machine includes a body extending along its length. The body has a water inlet at its bottom and spray holes at its top. The interior of the body is hollow, forming a flow channel extending along its length. The water inlet is located at the center of the bottom of the body. The width of the flow channel gradually increases and the thickness gradually decreases from the water inlet to its end. The top wall of the body has a plurality of spray holes communicating with the flow channel, and the number of spray holes gradually increases from the water inlet to its end.

[0009] The above structure involves designing the flow channel in the spray arm body to gradually widen from the center to the ends, and to balance water flow and head, the flow channel is designed to gradually thin from the center to the ends. This compensates for energy loss during the widening of the flow channel and water transport, maintaining a high water pressure. Furthermore, additional nozzles are added near the ends of the spray arm to increase spray coverage, eliminate cleaning dead zones, and improve cleaning efficiency. Simulation results show that, with a constant flow rate, the closer a nozzle is to the end of the spray arm, the higher its spray coverage. Therefore, this invention arranges the nozzles in a manner that gradually increases from the center to the ends to effectively improve cleaning coverage while maintaining a high head.

[0010] Preferably, the body and corresponding flow channel form a laterally extending straight section at the corresponding water inlet, and the two ends of the straight section are respectively connected to tapered sections with gradually increasing width. This structure is beneficial for increasing the width at the end of the spray arm, so as to set more spray holes and improve the spray coverage.

[0011] Preferably, the bottom wall of the body gradually extends downward from the end of the conical section to the direct current section to form a guide slope. The slope of this guide slope is 3 to 10 degrees, which helps to drain the water accumulated in the spray arm channel in a timely manner, so that there is no residual water in the spray arm after cleaning, thus avoiding bacterial growth.

[0012] Preferably, the top wall of the main body is provided with a first spray hole and a second spray hole at the corresponding conical section. The first spray hole is arranged vertically and used to spray water upwards, while the second spray hole is arranged obliquely and used to spray water upwards at an oblique angle. With the above structure, the first spray hole mainly provides a vertical jet of water, providing a large flushing force for a specific area, while the second spray hole can provide a larger spray range to further eliminate cleaning dead corners.

[0013] Preferably, there are at least two second spray holes arranged at an upward angle from the middle of the body towards the ends. Positioning the second spray holes in the middle, in conjunction with the first spray holes, provides greater spray coverage.

[0014] Preferably, the height of the second nozzle is greater than the height of the first nozzle. This structure helps to prevent the water column from the second nozzle from spreading out, increases its spray head, further improves the spray coverage, and eliminates cleaning dead zones.

[0015] Preferably, the first spray holes are multiple and arranged in a triangular structure with their tips facing the water inlet, corresponding to the shape of the conical segment. The second spray holes are surrounded within the first spray holes and located on the central axis of the conical segment. This structure helps to further improve the spray coverage of the second spray holes and eliminate cleaning dead zones.

[0016] Preferably, the angle between the sidewall of the conical section and the length direction of the main body is b, the angle between the guide slope and the horizontal plane is a, and the height of the direct flow section is H and the width is W, then tanb = (W × tana) / H. This structure ensures that the cross-sectional area of ​​the flow channel remains essentially unchanged, which helps maintain the head and water pressure without loss.

[0017] A cleaning machine includes a housing and the aforementioned spray arm.

[0018] Compared with the prior art, the advantages of this utility model are as follows: This utility model sets the flow channel in the spray arm body to a structure that gradually widens from the center to the end, and in order to balance the water flow and head, the flow channel is set to a structure that gradually thins from the center to the end, so as to compensate for the energy loss during the widening of the flow channel and the water flow transportation process, and maintain a large water pressure. On this basis, spray holes are added near the end of the spray arm to improve the spray coverage, eliminate cleaning dead corners, and improve the cleaning effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the spray arm in an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A sectional view;

[0021] Figure 3 for Figure 1 Top view;

[0022] Figure 4 for Figure 1 Side view;

[0023] Figure 5 for Figure 1 Another sectional view. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0030] like Figures 1-5 As shown, the spray arm for the cleaning machine in this embodiment includes a body 1 extending along the length direction. The body 1 has a water inlet 11 at the bottom and a spray hole at the top. The body 1 is hollow inside to form a flow channel 12 extending along its length direction. The water inlet 11 is located at the center of the bottom of the body 1. The width of the flow channel 12 gradually increases and the thickness gradually decreases from the water inlet 11 to its end. The top wall of the body 1 has a number of spray holes that communicate with the flow channel 12, and the number of spray holes gradually increases from the water inlet 11 to its end.

[0031] Using the above structure, the flow channel 12 in the spray arm body 1 is designed to gradually widen from the center to the end, and to balance the water flow rate and head, the flow channel 12 is designed to gradually thin from the center to the end. This compensates for the energy loss during the widening of the flow channel 12 and the water flow transportation process, maintaining a higher water pressure. Based on this, more nozzles are added near the end of the spray arm to increase the spray coverage, eliminate cleaning dead zones, and improve the cleaning effect. Simulation results show that, under a constant flow rate, the closer a nozzle is to the end of the spray arm, the higher its spray coverage. Therefore, in this embodiment, the nozzles are arranged in a manner that gradually increases from the center to the end to effectively improve the cleaning coverage while maintaining a high head.

[0032] In this embodiment, the main body 1 and the corresponding flow channel 12 form a laterally extending straight section 121 at the corresponding water inlet 11. The two ends of the straight section 121 are respectively connected to tapered sections 122 with gradually increasing width. This structure is beneficial to increase the width at the end of the spray arm, so as to set more spray holes and improve the spray coverage.

[0033] The bottom wall of the main body 1 gradually extends downward from the end of the conical section 122 to the direct flow section 121 to form a guide slope 123. The slope α of the guide slope 123 is 3 to 10 degrees, which helps to drain the water accumulated in the spray arm channel 12 in time, so that there is no residual water in the spray arm after cleaning, thus avoiding bacterial growth.

[0034] The top wall of the main body 1 has a first spray hole 131 and a second spray hole 132 at the corresponding conical section 122. The first spray hole 131 is arranged vertically and is used to spray water upwards, while the second spray hole 132 is arranged obliquely and is used to spray water upwards at an oblique angle. With the above structure, the first spray hole 131 mainly provides a vertical jet of water, providing a large flushing force for a specific area, while the second spray hole 132 can provide a larger spray range to further eliminate cleaning dead corners.

[0035] At least two second spray holes 132 are arranged with a gradually upward slope from the middle of the body 1 towards the ends. The second spray holes 132 are located in the middle to cooperate with the first spray holes 131 to provide a greater spray coverage.

[0036] The height of the second nozzle 132 is greater than the height of the first nozzle 131. This structure helps to prevent the water column sprayed from the second nozzle 132 from spreading out, increases its spray head, further improves the spray coverage, and eliminates cleaning dead corners.

[0037] The first nozzle 131 is a plurality of triangular structures arranged in a shape corresponding to the conical section 122, with the tips facing the water inlet 11. The second nozzle 132 is surrounded within the first nozzle 131 and located on the central axis of the conical section 122. This structure is beneficial for further improving the spray coverage of the second nozzle 132 and eliminating cleaning dead corners.

[0038] The angle between the sidewall of the conical section 122 and the length direction of the main body 1 is b, the angle between the guide slope 123 and the horizontal plane is a, the height of the direct current section 121 is H and the width is W, then tanb=(W×tana) / H.

[0039] The cleaning machine in this embodiment includes a housing and the aforementioned spray arm.

[0040] In this embodiment, the flow channel 12 in the spray arm body 1 is configured to gradually widen from the center to the end, and in order to balance the water flow and head, the flow channel 12 is configured to gradually thin from the center to the end to compensate for the energy loss during the widening of the flow channel 12 and the water flow transportation process, and maintain a large water pressure. On this basis, spray holes are added near the end of the spray arm to improve the spray coverage, eliminate cleaning dead corners, and improve the cleaning effect.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A spray arm for a cleaning machine, comprising a body (1) extending along its length, wherein the body (1) has a water inlet (11) at its bottom and a spray nozzle at its top, characterized in that: The body (1) has a hollow interior forming a flow channel (12) extending along its length. The inlet (11) is located at the center of the bottom of the body (1). The width of the flow channel (12) gradually increases and the thickness gradually decreases from the inlet (11) to its end. The top wall of the body (1) has several spray holes that communicate with the flow channel (12), and the number of spray holes gradually increases from the inlet (11) to its end.

2. The spray arm for a cleaning machine according to claim 1, characterized in that: The main body (1) and the corresponding flow channel (12) form a horizontally extending straight section (121) at the corresponding water inlet (11), and the two ends of the straight section (121) are respectively connected to tapered sections (122) with gradually increasing width.

3. The spray arm for a cleaning machine according to claim 2, characterized in that: The bottom wall of the body (1) gradually extends downward from the end of the conical section (122) to the direct current section (121) to form a flow guiding slope (123).

4. The spray arm for a cleaning machine according to claim 2, characterized in that: The top wall of the main body (1) is provided with a first nozzle (131) and a second nozzle (132) at the corresponding conical section (122). The first nozzle (131) is arranged vertically and used to spray water upward, and the second nozzle (132) is arranged obliquely and used to spray water upward at an oblique angle.

5. The spray arm for a cleaning machine according to claim 4, characterized in that: The second nozzle (132) consists of at least two nozzles and is arranged to gradually slope upwards from the middle of the body (1) toward the end.

6. The spray arm for a cleaning machine according to claim 4, characterized in that: The height of the second nozzle (132) is greater than the height of the first nozzle (131).

7. The spray arm for a cleaning machine according to claim 4, characterized in that: The first nozzle (131) is a plurality of triangular structures arranged in a shape corresponding to the conical segment (122) with the tip facing the inlet (11). The second nozzle (132) is surrounded within the first nozzle (131) and located on the central axis of the conical segment (122).

8. The spray arm for a cleaning machine according to claim 3, characterized in that: The angle between the sidewall of the conical section and the length direction of the body is b, the angle between the guide slope and the horizontal plane is a, the height of the DC section is H and the width is W, then tanb=(W×tana) / H.

9. A cleaning machine, comprising a housing, characterized in that it further comprises a spray arm according to any one of claims 1 to 8.

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