Upper spraying arm for cleaning machine and cleaning machine

Abstract

The upper spraying arm comprises a body, a water inlet is formed in the middle of the top wall of the body, a flow channel which is communicated with the water inlet and extends in the length direction of the body is arranged in the body, and a flow guide cone which corresponds to the water inlet and extends upwards is arranged on the bottom wall of the flow channel. Blades capable of driving the upper spraying arm to rotate under the impact of inlet water are arranged on the peripheral surface of the flow guide cone. The flow guide cone arranged towards the water inlet is arranged on the inner bottom wall of the flow channel, the blades are arranged on the peripheral face of the flow guide cone, and under the impact action of inlet water, the impeller formed by the blades and the flow guide cone generates rotating force, so that the upper spraying arm is driven to rotate automatically, an acceleration hole does not need to be additionally formed or the inclination of the spraying hole is not set to be large; inclination angles of the spray holes can be set according to positions of the bowl baskets, so that water flow utilization rate of water columns sprayed by the spray holes is increased, and cleaning effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to an upper spray arm for a dishwasher for cleaning tableware and fruits and vegetables, and a dishwasher. Background Art

[0002] Since the box-type dishwasher is relatively large in volume, in order to ensure the cleaning effect, a lower spray arm for upward spraying is generally arranged at the bottom of the box body, and an upper spray arm for upward spraying is arranged in the middle.

[0003] For example, CN 202410227321.9 "A Dishwasher and a Dishwashing Method" discloses such a structure. The water flow supplied to the upper spray arm generally comes from the circulating water in the box body, that is, the circulating water is transported from the bottom of the box body to the top of the upper spray arm through a vertically arranged pipeline by a water pumping mechanism, and then sprayed upward through the upper spray arm. In order to enable the upper spray arm to rotate, acceleration holes are usually opened on the upper spray arm, or some spray holes are set with a large slope, and the reaction force of the sprayed water column is used to provide a driving force for the rotation of the upper spray arm. However, the water flow sprayed by such a spray hole setting method has a very low utilization rate for tableware cleaning, resulting in the need for the dishwasher to supply a large flow rate, with high water and electricity consumption. Summary of the Utility Model

[0004] The first technical problem to be solved by the utility model is to provide an upper spray arm for a dishwasher that can rotate automatically under the impact of water inlet to meet the requirement of high water flow utilization rate of spray holes according to the current situation of the prior art.

[0005] The second technical problem to be solved by the utility model is to provide a dishwasher applying the above upper spray arm according to the current situation of the prior art.

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

[0007] An upper spray arm for a dishwasher, including a body, an inlet is opened in the middle of the top wall of the body, a flow channel communicating with the inlet and extending along the length direction of the body is provided in the body, a guide cone extending upward corresponding to the inlet is arranged on the bottom wall of the flow channel, and blades capable of driving the upper spray arm to rotate under the impact of water inlet are arranged on the outer peripheral surface of the guide cone.

[0008] In the utility model, a guide cone is arranged on the inner bottom wall of the flow channel and is arranged towards the inlet, and blades are arranged on the outer peripheral surface of the guide cone. Under the impact of water inlet, the impeller formed by the blades and the guide cone generates a rotational force, thereby driving the upper spray arm to rotate automatically. There is no need to additionally set acceleration holes or set a large slope for the spray holes. The spray holes can be set with an inclination angle according to the position of the dish basket, so as to improve the water flow utilization rate of the water column sprayed by the spray holes and improve the cleaning effect.

[0009] Preferably, the tip of the flow guide cone is arranged upward, the blades extend spirally along the axial direction on the outer peripheral surface of the flow guide cone, and the spiral twisting direction of the blades is the same as the rotation direction of the upper spray arm. With the above structure, the rotational force is obtained by using the axial flow impeller.

[0010] Preferably, there are two groups of the blades and they are symmetrically distributed about the center on the outer peripheral surface of the flow guide cone. With such a structure, the impeller formed by the blades and the flow guide cone can be balanced in force in the circumferential direction, driving the upper spray arm to rotate stably.

[0011] Preferably, a plane higher than the top wall of the flow channel is formed at the top of the flow guide cone, the top edge of the blade is flush with this plane, and the bottom edge of the blade is connected to the inner bottom wall of the flow channel. This structure is beneficial to reducing the loss of water flow capacity at the water inlet, so as to enable the blade to have a good rotational driving force.

[0012] Preferably, a water pipe for supplying water to the upper spray arm is arranged above the upper spray arm, an inlet sleeve extending upward from the edge of the water inlet is arranged on the top wall of the body, an outlet sleeve capable of being inserted into the inlet sleeve is arranged at the water outlet end of the water pipe, and the top of the blade is arranged lower than the lower end of the outlet sleeve. With such a structure, the water flow impact force received by the blade is increased.

[0013] Preferably, the outlet sleeve of the water pipe and the inlet sleeve of the body are rotationally connected through a rotating assembly. This structure is the prior art and will not be elaborated here.

[0014] As an improvement, the surface of the blade facing the incoming water is the water-facing surface, and convex ribs extending in the direction of the incoming water are arranged at the edge of the water-facing surface. The convex ribs and the water-facing surface together form a water-gathering structure. With such a structure, more water flow can be made to flow along the spiral direction of the blade, making it easier for the blade to be forced to rotate.

[0015] A cleaning machine includes a box body and also includes the above-mentioned upper spray arm, and the upper spray arm is arranged in the box body.

[0016] Compared with the prior art, the advantages of the present utility model are as follows: In the present utility model, a flow guide cone arranged towards the water inlet is provided on the inner bottom wall of the flow channel, and blades are arranged on the outer peripheral surface of the flow guide cone. Under the action of the incoming water impact, the impeller formed by the blades and the flow guide cone generates a rotational force, thereby driving the upper spray arm to rotate automatically. There is no need to additionally provide acceleration holes or set a large slope for the spray holes. The spray holes can be set at an inclined angle according to the position of the bowl basket, so as to improve the water flow utilization rate of the water column sprayed from the spray holes and improve the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 isFigure 1 Partial sectional view;

[0019] Figure 3 It is a schematic structural diagram of the flow guide cone and the blade in the embodiment of the present utility model. Specific embodiments

[0020] The present utility model will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0021] As Figures 1 to 3 shown, the upper spray arm for the dishwasher in this embodiment includes a main body 1. A water inlet 11 is opened in the middle of the top wall of the main body 1. A flow channel 12 that is connected to the water inlet 11 and extends along the length direction of the main body 1 is provided in the main body 1. A flow guide cone 13 that extends upward corresponding to the water inlet 11 is provided on the bottom wall of the flow channel 12. A blade 14 that can drive the upper spray arm to rotate under the impact of water inlet is provided on the outer peripheral surface of the flow guide cone 13.

[0022] A flow guide cone 13 is arranged on the inner bottom wall of the flow channel 12 facing the water inlet 11, and a blade 14 is arranged on the outer peripheral surface of the flow guide cone 13. Under the impact of the water inlet, the impeller formed by the blade 14 and the flow guide cone 13 generates a rotational force, thereby driving the upper spray arm to rotate automatically. There is no need to additionally provide an acceleration hole or set a large inclination angle for the spray holes. The inclination angle of the spray holes 16 can be set according to the position of the bowl basket, thereby improving the water flow utilization rate of the water column sprayed from the spray holes and improving the cleaning effect.

[0023] The tip of the flow guide cone 13 is arranged upward. The blade 14 spirally extends axially on the outer peripheral surface of the flow guide cone 13, and the spiral twisting direction of the blade 14 is the same as the rotation direction of the upper spray arm. With the above structure, the rotational force can be obtained by using an axial flow impeller.

[0024] There are two groups of blades 14 and they are symmetrically distributed about the center on the outer peripheral surface of the flow guide cone 13. With such a structure, the impeller formed by the blade 14 and the flow guide cone 13 can be balanced in force in the circumferential direction, driving the upper spray arm to rotate stably.

[0025] A plane 131 that is higher than the top wall of the flow channel 12 is formed at the top of the flow guide cone 13. The top edge of the blade 14 is flush with the plane 131, and the bottom edge of the blade 14 is connected to the inner bottom wall of the flow channel 12. This structure is beneficial to reducing the loss of water flow capacity at the water inlet 11, so as to enable the blade 14 to have a good rotational driving force.

[0026] A water pipe 2 for supplying water to the upper spray arm is arranged above the upper spray arm. An inlet sleeve 15 that extends upward from the edge of the water inlet 11 is arranged on the top wall of the main body 1. An outlet sleeve 21 that can be inserted into the inlet sleeve 15 is arranged at the water outlet end of the water pipe 2. The top of the blade 14 is arranged lower than the lower end of the outlet sleeve 21. With such a structure, the water flow impact received by the blade 14 can be increased.

[0027] The water outlet sleeve of the water pipe 2 is rotatably connected to the water inlet sleeve of the main body 1 through a rotating assembly 3. This structure is prior art and will not be elaborated here.

[0028] The side of the blade 14 facing the oncoming water is the water-facing surface 141. At the edge of the water-facing surface 141, there is a rib 142 extending in the direction of the oncoming water. The rib 142 and the water-facing surface 141 together form a water-gathering structure. With such a structure, more water flow can be made to flow along the spiral direction of the blade 14, making it easier for the blade 14 to be stressed and rotate.

[0029] The cleaning machine of this embodiment includes a box body, and also includes the above-mentioned upper spray arm, which is arranged in the box body.

[0030] In this embodiment, a flow guide cone 13 is arranged on the inner bottom wall of the flow channel 12 and is arranged towards the water inlet 11. And on the outer peripheral surface of the flow guide cone 13, there is a blade 14. Under the impact of the incoming water, the impeller formed by the blade 14 and the flow guide cone 13 generates a rotational force, thereby driving the upper spray arm to rotate automatically. There is no need to additionally set acceleration holes or make the inclination of the spray holes large. The inclination angle of the spray holes can be set according to the position of the bowl basket, thereby improving the water flow utilization rate of the water column sprayed by the spray holes 16 and improving the cleaning effect.

[0031] In the description and claims of the present utility model, terms indicating directions such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc. are used to describe various exemplary structural parts and elements of the present utility model. However, these terms are used here only for the convenience of description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed by the present utility model can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

Claims

1. An upper spray arm for a cleaning machine, comprising a body (1). A water inlet (11) is formed in the middle of the top wall of the body (1). A flow channel (12) is provided in the body (1) and is communicated with the water inlet (11) and extends along the length direction of the body (1). It is characterized in that: A guiding cone (13) extending upward corresponding to the water inlet (11) is arranged on the bottom wall of the flow channel (12), and blades (14) capable of driving the upper spray arm to rotate under the impact of water inlet are arranged on the outer peripheral surface of the guiding cone (13).

2. The upper spray arm for a cleaning machine according to claim 1, characterized in that: The blades (14) extend spirally along the axial direction on the outer peripheral surface of the guiding cone (13), and the spiral twisting direction of the blades (14) is consistent with the rotation direction of the upper spray arm.

3. The upper spray arm for a washing machine according to claim 2, characterized in that: There are two groups of the blades (14) and they are symmetrically distributed about the center on the outer peripheral surface of the guiding cone (13).

4. The upper spray arm for a cleaning machine according to claim 2, characterized in that: A plane (131) higher than the top wall of the flow channel (12) is formed at the top of the guiding cone (13), the top edge of the blade (14) is flush with this plane, and the bottom edge of the blade (14) is connected to the inner bottom wall of the flow channel (12).

5. The upper spray arm for a washing machine according to claim 4, characterized in that: A water pipe (2) for supplying water to the upper spray arm is arranged above the upper spray arm, a water inlet sleeve (15) extending upward from the edge of the water inlet (11) is arranged on the top wall of the body (1), a water outlet sleeve (21) capable of being inserted into the water inlet sleeve (15) is arranged at the water outlet end of the water pipe (2), and the top of the blade (14) is arranged lower than the lower end of the water outlet sleeve (21).

6. The upper spray arm for a washing machine according to claim 5, characterized in that: The water outlet sleeve of the water pipe (2) and the water inlet sleeve of the body (1) are rotationally connected through a rotating assembly (3).

7. The upper spray arm for a cleaning machine according to any one of claims 2 to 6, characterized in that: The side of the blade (14) facing the incoming water is the water-facing surface (141), and a rib (142) extending in the direction of the incoming water is arranged at the edge of the water-facing surface (141), and the rib (142) and the water-facing surface (141) together form a water-gathering structure.

8. A cleaning machine, comprising a box body, characterized in that: It further includes the upper spray arm according to any one of claims 1 to 7, and the upper spray arm is arranged in the box body.

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