Spray arms and dishwashers

Abstract

The utility model provides a spray arm and a dishwasher, which relate to the technical field of kitchen appliances. The spray arm comprises: a main arm and a secondary arm, wherein a first flow channel is arranged in the main arm; a second flow channel connected with the first flow channel is arranged in the secondary arm; the secondary arm is located above the main arm, and the secondary arm is rotatably connected with the main arm; the secondary arm comprises a secondary arm body extending outward from its axis, the secondary arm body comprises a rear side wall facing away from the rotation direction, the rear side wall is inclined upward, a secondary drive spray hole is arranged on the rear side wall, and the water flow sprayed from the secondary drive spray hole can drive the secondary arm to rotate relative to the main arm.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a spray arm and a dishwasher. Background Art

[0002] Dishwashers are automated devices that automatically clean bowls, chopsticks, plates, and dishes. With the improvement of people's living standards, dishwashers are also used by more and more families. They can reduce the labor intensity of users, improve work efficiency, promote cleanliness and hygiene, and satisfy users' comfortable living experience.

[0003] The spray mechanism is a key component of the dishwasher. The existing spray mechanism includes a spray arm driven by water pressure to rotate. The spray arm can be composed of a main arm at the bottom and a secondary arm rotatably connected to the top of the main arm. The secondary arm is in a straight line or a cross shape. A secondary drive hole is provided on the side of the secondary arm. When water flows out from the secondary drive hole, the secondary arm can be driven to rotate.

[0004] However, in order to avoid excessive resistance to the rotation of the auxiliary arm, the auxiliary arm is designed to be relatively thin, resulting in a very narrow side of the auxiliary arm, which makes it very difficult to prepare the auxiliary drive hole on the side wall. Utility Model Content

[0005] The utility model aims to provide a spray arm and a dishwasher to alleviate the technical problem of difficulty in preparing auxiliary drive holes on the existing auxiliary arms.

[0006] In a first aspect, the utility model provides a spray arm, comprising:

[0007] A main arm, wherein a first flow channel is arranged in the main arm;

[0008] A jib, wherein a second flow channel connected to the first flow channel is arranged in the jib; the jib is located above the main arm, and the jib is rotationally connected to the main arm; the jib includes a jib body extending outward from its axis, the jib body includes a rear side wall facing away from the rotation direction, the rear side wall is inclined upward, a secondary drive spray hole is arranged on the rear side wall, and the water flow sprayed from the secondary drive spray hole can drive the jib to rotate relative to the main arm.

[0009] Furthermore, the auxiliary arm body includes a front side wall facing the rotation direction, and the front side wall is inclined to reduce the rotation resistance.

[0010] Furthermore, the main arm includes at least two main arm bodies extending outward from the axis thereof, and the auxiliary arm is rotatably connected to the main arm body.

[0011] Furthermore, the main arm includes a first main arm body and a second main arm body extending outward from the axis thereof, and the second main arm body is connected to the auxiliary arm.

[0012] Furthermore, the maximum running trajectory line of the first main arm body is tangent to the maximum running trajectory line of the auxiliary arm body.

[0013] Furthermore, the rotation direction of the main arm is opposite to the rotation direction of the auxiliary arm.

[0014] Furthermore, the ratio of the rotation speed of the main arm to the rotation speed of the auxiliary arm ranges from 1:2 to 1:10.

[0015] Furthermore, the auxiliary arm is clamped with the main arm.

[0016] Furthermore, a mounting hole is provided on the main arm;

[0017] A rotating shaft extending downward is arranged at the center of the auxiliary arm, and a claw is arranged at the lower end of the rotating shaft;

[0018] A limiting protrusion spaced apart from the clamping claw is arranged on the outer wall of the rotating shaft, the clamping claw and the limiting protrusion are spaced apart in the up and down directions, and the mounting hole is clamped between the clamping claw and the limiting protrusion.

[0019] Furthermore, the upper surface of the auxiliary arm body is provided with a first auxiliary spray hole facing upwards;

[0020] And / or, a second auxiliary spray hole is arranged on the upper surface of the auxiliary arm body, and the second auxiliary spray hole is arranged at an angle with the vertical direction.

[0021] In a second aspect, the utility model provides a dishwasher comprising the above-mentioned spray arm.

[0022] The utility model has at least the following advantages or beneficial effects:

[0023] The spray arm provided by the utility model comprises: a main arm and a sub-arm, wherein a first flow channel is arranged in the main arm; a second flow channel connected with the first flow channel is arranged in the sub-arm; the sub-arm is located above the main arm, and the sub-arm is rotatably connected with the main arm; the sub-arm comprises a sub-arm body extending outward from its axis, the sub-arm body comprises a rear side wall facing away from the rotation direction, the rear side wall is inclined upward, a sub-driving spray hole is arranged on the rear side wall, and the water flow sprayed from the sub-driving spray hole can drive the sub-arm to rotate relative to the main arm.

[0024] In this embodiment, the rear side wall of the auxiliary arm body is set to be inclined, so that a rear side wall with a larger area can be formed on the auxiliary arm body with a narrow thickness, which makes it easier to open the auxiliary drive nozzle during the preparation process, and provides the possibility of preparing a narrower auxiliary arm body. At the same time, the inclined rear side wall can also make the rotation of the auxiliary arm body smoother and with less resistance.

[0025] The dishwasher provided by the utility model includes the above-mentioned spray arm. Since the dishwasher provided by the utility model adopts the above-mentioned spray arm, the dishwasher provided by the utility model also has the advantages of the spray arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a spray arm provided in an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of a main arm of a spray arm provided in an embodiment of the utility model;

[0029] Figure 3 A schematic diagram of a secondary arm of a spray arm provided in an embodiment of the utility model;

[0030] Figure 4 A schematic cross-sectional view of the assembly position of the auxiliary arm of the spray arm provided in an embodiment of the utility model;

[0031] Figure 5 A schematic diagram of the rotation of the spray arm provided in an embodiment of the utility model;

[0032] Figure 6 It is a schematic diagram of the rotary spraying trajectory of a single-layer spraying arm in the prior art;

[0033] Figure 7 A schematic diagram of the rotating spray trajectory of the spray arm provided in an embodiment of the utility model.

[0034] Icons: 1-main arm; 11-first main arm body; 111-main spray hole; 112-main drive spray hole; 12-second main arm body; 121-installation hole;

[0035] 2 - auxiliary arm; 21 - auxiliary arm body; 211 - rear side wall; 2111 - auxiliary drive spray hole; 22 - auxiliary spray hole; 23 - claw; 24 - limiting protrusion; 212 - front side wall. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] like Figure 1 - Figure 3 As shown, the spray arm provided by the utility model comprises: a main arm 1 and a secondary arm 2, wherein a first flow channel is arranged in the main arm 1. A second flow channel communicating with the first flow channel is arranged in the secondary arm 2. The spray arm is mounted on the base of the dishwasher, and water enters the first flow channel through the rotating shaft of the main arm 1, and then enters the second flow channel through the rotating shaft of the secondary arm 2.

[0043] The auxiliary arm 2 is located above the main arm 1, and the auxiliary arm 2 is rotatably connected to the main arm 1. The main arm 1 rotates relative to the base of the dishwasher, and the auxiliary arm 2 rotates relative to the main arm 1, so that the spray arm forms a double-layer structure.

[0044] like Figure 3 As shown, the auxiliary arm 2 includes an auxiliary arm body 21 extending outward from its axis, and the auxiliary arm body 21 may include an upper surface and a lower surface spaced apart from each other, and a rear side wall 211 and a front side wall 212 respectively connecting the upper surface and the lower surface, wherein the rear side wall 211 faces away from the rotation direction, and the front side wall 212 faces the rotation direction, and the upper surface, the lower surface, the rear side wall 211 and the front side wall 212 form a tubular structure to allow water to flow through.

[0045] The rear side wall 211 is inclined upward, and the water flow sprayed from the auxiliary driving spray hole 2111 can drive the auxiliary arm 2 to rotate relative to the main arm 1. The front side wall 212 can also be inclined upward, and the inclined front side wall 212 can reduce resistance.

[0046] From top to bottom, the distance between the front side wall 212 and the rear side wall 211 gradually increases, and the cross-section of the auxiliary arm body 21 is roughly trapezoidal.

[0047] The rear side wall 211 may be a flat surface or a curved surface.

[0048] The rear side wall 211 is provided with a secondary drive spray hole 2111, and the water flow sprayed from the secondary drive spray hole 2111 can drive the auxiliary arm 2 to rotate relative to the main arm 1. In this embodiment, the rear side wall 211 of the auxiliary arm body 21 is set to be inclined, so that a rear side wall 211 with a larger area can be formed on the auxiliary arm body 21 with a narrower thickness, which makes it easier to open the secondary drive spray hole 2111 during the preparation process, and provides the possibility of preparing a narrower auxiliary arm body 21. At the same time, the inclined rear side wall 211 can also make the rotation of the auxiliary arm body 21 smoother and with less resistance.

[0049] The main arm 1 includes at least two main arm bodies extending outward from its axis, and the auxiliary arm 2 is rotatably connected to the main arm body. In this embodiment, the number of the main arm bodies is three. In other feasible schemes, the number of the main arm bodies can also be two, four or more branches.

[0050] The structures of each branch of the main arm body are not limited to the same shape, and the shape, length and other features of each branch may be different.

[0051] In this embodiment, the number of the auxiliary arm bodies 21 on the auxiliary arm 2 is three. In other feasible solutions, the number of the auxiliary arm bodies 21 can also be two, four or more branches.

[0052] like Figure 2As shown, in this embodiment, the main arm 1 includes a first main arm body 11 and a second main arm body 12 extending outward from its axis, and the second main arm body 12 is connected to the auxiliary arm 2, wherein the number of the first main arm bodies 11 is two, the number of the second main arm body 12 is one, and the auxiliary arm 2 is only arranged on the second main arm body 12, while the auxiliary arm 2 is not arranged on the first main arm body 11. The first main arm body 11 is provided with a main driving spray hole 112 for driving the main arm 1 to rotate relative to the base. The portion of the second main arm body 12 that does not overlap with the auxiliary arm 2 may also be provided with a main spray hole 111.

[0053] like Figure 2 As shown, the upper surface of the first main arm body 11 is provided with main spray holes 111. The number of the main spray holes 111 is at least two, and they are arranged in sequence along the length direction of the main arm body. The directions of each main spray hole 111 can be different, and water is sprayed in different directions when the main arm 1 rotates.

[0054] like Figure 3 As shown, an auxiliary spray hole 22 is provided on the auxiliary arm body 21, and the auxiliary spray hole 22 is provided on the upper surface of the auxiliary arm body 21. Further, the auxiliary spray hole 22 can be a first auxiliary spray hole facing directly upward; the auxiliary spray hole 22 can also be a second auxiliary spray hole set at an angle to the vertical direction, so that the sprayed water flow has different directions.

[0055] like Figure 6 and Figure 7 As shown, the maximum running trajectory of the first main arm body 11 is tangent to the maximum running trajectory of the auxiliary arm body 21, ensuring the maximum spray range of the auxiliary arm body 21. The spray range of the first main arm body 11 during the washing process is circular. At the same time, the movement of the auxiliary arm 2 is superimposed on the movement of the lower main arm 1, and the trajectory of the auxiliary spray hole 22 is relatively complex. In this way, during the washing process, the spray coverage area of ​​the main spray hole 111 and the auxiliary spray hole 22 will be larger than that of a normal spray arm. At the same time, the irregular spray trajectory can also clean the angles that the general spray arm cannot clean, so that the cleaning effect is significantly improved.

[0056] Further, such as Figure 5 As shown, the rotation direction of the main arm 1 is opposite to that of the auxiliary arm 2. During rotary spraying, the spraying angle and the overall coverage area are larger than those rotating in the same direction, and the cleaning effect is better.

[0057] Furthermore, the size ratio of the main drive spray hole 112 and the auxiliary drive spray hole 2111 can be controlled so that the ratio of the rotation speed of the main arm 1 to the rotation speed of the auxiliary arm 2 is in the range of 1:2-1:10. This speed ratio can improve the cleaning effect of tableware.

[0058] In this embodiment, Figure 4 As shown, the auxiliary arm 2 and the main arm 1 can be connected together in a clamping manner.

[0059] Specifically, a mounting hole 121 is provided on the upper surface of the second main arm body 12. A rotating shaft extending downward is provided at the center of the auxiliary arm 2, and a wedge-shaped claw 23 is provided at the lower end of the rotating shaft. A limiting protrusion 24 spaced apart from the claw 23 is provided on the outer wall of the rotating shaft. The claw 23 and the limiting protrusion 24 are spaced apart in the vertical direction. The claw 23 can be inserted into the mounting hole 121 from top to bottom until the limiting protrusion 24 abuts against the upper surface of the main arm body. The mounting hole 121 is clamped between the claw 23 and the limiting protrusion 24, and plays a limiting role in the vertical direction.

[0060] The dishwasher provided by the utility model includes the above-mentioned spray arm. Since the dishwasher provided by the utility model adopts the above-mentioned spray arm, the dishwasher provided by the utility model also has the advantages of the spray arm.

[0061] The dishwasher can spray water through the spray arm and can also be connected to the air source to spray hot air through the main spray hole 111 and the auxiliary spray hole 22 on the spray arm to dry the tableware, which greatly improves the drying effect of the tableware and shortens the overall drying time.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A spray arm, characterized in that: include: A main arm (1), wherein a first flow channel is arranged in the main arm (1); A secondary arm (2), wherein a second flow channel connected to the first flow channel is arranged in the secondary arm (2); the secondary arm (2) is located above the main arm (1), and the secondary arm (2) is rotatably connected to the main arm (1); the secondary arm (2) comprises a secondary arm body (21) extending outward from its axis, the secondary arm body (21) comprises a rear side wall (211) facing away from the rotation direction, the rear side wall (211) is inclined upward, and a secondary drive spray hole (2111) is arranged on the rear side wall (211), and the water flow sprayed from the secondary drive spray hole (2111) can drive the secondary arm (2) to rotate relative to the main arm (1).

2. The spray arm according to claim 1, characterized in that: The auxiliary arm body (21) comprises a front side wall (212) facing the rotation direction, and the front side wall (212) is arranged inclined to reduce rotation resistance.

3. The spray arm according to claim 1, characterized in that: The main arm (1) comprises at least two main arm bodies extending outward from the axis thereof, and the auxiliary arm (2) is rotatably connected to the main arm bodies.

4. The spray arm according to claim 3, characterized in that: The main arm (1) comprises a first main arm body (11) and a second main arm body (12) extending outward from its axis, and the auxiliary arm (2) is connected to the second main arm body (12).

5. The spray arm according to claim 4, characterized in that: The maximum running trajectory of the first main arm body (11) is tangent to the maximum running trajectory of the auxiliary arm body (21).

6. The spray arm according to claim 1, characterized in that: The ratio of the rotation speed of the main arm (1) to the rotation speed of the auxiliary arm (2) is in the range of 1:2 to 1:10; And / or, the rotation direction of the main arm (1) is opposite to the rotation direction of the auxiliary arm (2).

7. The spray arm according to claim 1, characterized in that: The auxiliary arm (2) is clamped with the main arm (1).

8. The spray arm according to claim 7, characterized in that: The main arm (1) is provided with a mounting hole (121); A rotating shaft extending downward is arranged at the center of the auxiliary arm (2), and a claw (23) is provided at the lower end of the rotating shaft; A limiting protrusion (24) is arranged on the outer wall of the rotating shaft and is spaced apart from the clamping claw (23); the clamping claw (23) and the limiting protrusion (24) are spaced apart in the up and down directions; and the mounting hole (121) is clamped between the clamping claw (23) and the limiting protrusion (24).

9. The spray arm according to claim 1, characterized in that: The upper surface of the auxiliary arm body (21) is provided with a first auxiliary spray hole facing upward; And / or, the upper surface of the auxiliary arm body (21) is provided with a second auxiliary spray hole, and the direction of the second auxiliary spray hole is arranged at an angle with the vertical direction.

10. A dishwasher, characterized in that: Comprising the spray arm described in any one of claims 1 to 9.

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