CN214208280U

CN214208280U - Spray arm

Info

Publication number: CN214208280U
Application number: CN202022455367.6U
Authority: CN
Inventors: 魏本柱
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-09-17
Anticipated expiration: 2030-10-29

Abstract

The utility model relates to a spray arm, including the body that has the hole for water spraying, its characterized in that: the outer wall of the body is provided with a first nozzle extending along the edge of the water spraying hole, the periphery of the first nozzle is provided with a second nozzle, the second nozzle is provided with a water outlet arranged corresponding to the water outlet end of the first nozzle, a gas collection cavity is formed by the inner wall of the second nozzle and the outer wall of the first nozzle in a surrounding mode, and the second nozzle is provided with a gas inlet hole for allowing outside gas to enter the gas collection cavity. The utility model arranges the gas collecting cavity at the top of the spray arm, and according to the Venturi effect, in the process of jetting water flow through the first nozzle and the second nozzle, the air in the gas collecting cavity can be sucked into the water column through the gap between the first nozzle and the second nozzle, so that the jet flow is entrained with bubbles, and the bubbles can be broken on the surfaces of bowls, dishes or fruits and vegetables to improve the stripping force of pollutants and improve the cleaning effect; the utility model discloses a from inspiratory mode with gaseous joining efflux in, and need not to set up air pump etc. greatly reduced manufacturing cost.

Description

Spray arm

Technical Field

The utility model relates to a dish washer accessory technical field specifically indicates a spray arm.

Background

With the increasing living standard of people, the dish washing machine is used as a kitchen household appliance and is more and more introduced into families. The dish-washing machines on the market at present are generally divided into a table type dish-washing machine, a cabinet type dish-washing machine and a trough type dish-washing machine, wherein the table type dish-washing machine is an integral independent structure and is generally placed on a table top for use; the cabinet type dish washing machine is also an independent structure, but needs to be embedded into a kitchen cabinet for use; the sink dishwasher is combined with a sink and is generally installed in a kitchen cabinet for use.

The above-mentioned various types of dish washers generally achieve a washing action by a water pump lifting up water and spraying it toward dishes in a washing space. For example, chinese patent application No. CN97236119.7, microcomputer light-operated full-automatic dishwasher, and chinese patent application No. CN00240098.7, a dishwasher disclose similar structures, in which the impact force of water flow sprayed to the dishes is weak and not uniform enough, and when there are many dishes, the water flow cannot cover the dishes, resulting in poor cleaning effect. Chinese patent CN200710306898.5, dish washing machine, especially household dish washing machine, with a device for improving decontamination effect, provides a vaporization device for generating a fluid mist that can be introduced into the chamber of the dish washing machine to enlarge the washing area of the dish and improve the uniformity of the washing medium, but this type of structure still cannot solve the problem of weak impact force of the ejected water flow. Chinese patent No. 201610795828.X "a large-scale ultrasonic automatic dish washer" has set up ultrasonic wave emission head device to input highly-compressed air in the washing liquid simultaneously, utilize ultrasonic wave emission head device to make the highly-compressed air of input form the bubble in the washing liquid, ultrasonic transducer is used for providing the energy for the washing liquid, make the bubble in the washing liquid break and produce the impact force, thereby improve the water impact force. However, in this kind of structure, the instantaneous empty explosion phenomenon that produces between ultrasonic wave and the high pressure bubble need can only be maintained in aqueous, when rivers were promoted by the water pump and circulated blowout, the high pressure bubble was difficult to reach the bowl dish surface and takes place to break promptly, can't be applicable to among the water jet type dish washer structure. In addition, the structure is only suitable for large dish washing machines, and is difficult to be applied to household dish washing machines.

In order to solve the above problem, the prior application 201721042431.X and the like of the present applicant discloses a solution for improving the washing effect by introducing air into the shower arm so as to entrain air bubbles in the water flow. This scheme need set up the air pump and drum into the air in to the spray arm, and overall structure is comparatively complicated, and manufacturing cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem to prior art's current situation, thereby provide one kind can inhale gas makes smuggleing secretly bubble and then improve cleaning performance and low in production cost in the injection rivers automatically and spray the arm.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a spray arm comprising a body having a spout hole, characterized in that: the outer wall of the body is provided with a first nozzle extending along the edge of the water spraying hole, the periphery of the first nozzle is provided with a second nozzle, the second nozzle is provided with a water outlet arranged corresponding to the water outlet end of the first nozzle, a gas collection cavity is formed by the inner wall of the second nozzle and the outer wall of the first nozzle in a surrounding mode, and the second nozzle is provided with a gas inlet hole for allowing outside gas to enter the gas collection cavity.

Preferably, a gap for the gas to be sucked into the water column is arranged between the liquid outlet end of the first nozzle and the liquid inlet end of the second nozzle. The width of the gap is 1-5 mm. When the water column passes through, negative pressure can be formed at the gap, so that air in the air collection cavity is sucked into the water column, and bubbles are carried in the water column.

Preferably, the cross section of the gas collection cavity is U-shaped, and the gas inlet is arranged on the side wall of the U-shaped gas collection cavity. Further preferably, the air inlet holes are arranged corresponding to the outer side wall of the first nozzle. The structure can ensure that the air is uniformly filled in the air collecting cavity and then is sucked into the water column, thereby improving the air-entrapping stability.

Preferably, the cross-sectional area of the air inlet is 0.1-0.3 times of the cross-sectional area of the air collection cavity. The first nozzle is provided with a conical section and a direct-current section which are sequentially connected along the water flow direction, the axial taper of the conical section is 10-15 degrees, and the inner diameter of the gas collection cavity is 1.5-2 times of the inner diameter of the direct-current section. The length of the direct current section is 1-2 mm, and the inner diameter of the liquid outlet end of the second nozzle is larger than that of the direct current section. By adopting the parameters, the quantity of gas matched with the water flow can be sucked according to the self capacity of the water flow, the bubbles are prevented from being broken before reaching the object to be cleaned, and the utilization rate of the bubbles is improved.

In each of the above schemes, the body is provided with a flow channel extending along the length direction of the body, the bottom wall of the body is provided with a water inlet communicated with the flow channel, and the water spray hole is arranged on the top wall of the body.

Compared with the prior art, the utility model has the advantages of: the utility model arranges the gas collecting cavity at the top of the spray arm, and according to the Venturi effect, in the process of jetting water flow through the first nozzle and the second nozzle, the air in the gas collecting cavity can be sucked into the water column through the gap between the first nozzle and the second nozzle, so that the jet flow is entrained with bubbles, and the bubbles can be broken on the surfaces of bowls, dishes or fruits and vegetables to improve the stripping force of pollutants and improve the cleaning effect; the utility model discloses a from inspiratory mode with gaseous joining efflux in, and need not to set up air pump etc. greatly reduced manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is an enlarged view of a portion a in fig. 2.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 3, the spray arm of the present embodiment includes a body 1, a flow channel 11 extending along a length direction of the body 1 is provided in the body 1, a water inlet 12 communicated with the flow channel 11 is provided on a bottom wall of the body 1, and a water spray hole 13 is provided on a top wall of the body.

The top wall of the body 1 is provided with a first nozzle 14 extending along the edge of the water spraying hole 13, the periphery of the first nozzle 14 is provided with a second nozzle 15, the second nozzle 15 is provided with a water outlet 151 arranged corresponding to the water outlet end of the first nozzle 14, the inner wall of the second nozzle 15 and the outer wall of the first nozzle 14 jointly enclose a gas collecting cavity 16, and the second nozzle 15 is provided with a gas inlet 152 for the outside gas to enter the gas collecting cavity 16.

Specifically, a gap 10 for the gas to be sucked into the water column is arranged between the liquid outlet end of the first nozzle 14 and the liquid inlet end of the second nozzle 15. The width d of the gap 10 is 1 to 5 mm. When the water column passes through, negative pressure can be formed at the gap 10, so that air in the air collecting cavity 16 is sucked into the water column, and air bubbles are entrained in the water column.

The cross section of the gas collection chamber 16 is U-shaped in this embodiment, and the gas inlet hole 152 opens on the side wall of the U-shaped gas collection chamber 16. The air intake holes 152 are arranged corresponding to the outer side wall of the first nozzle 14. The structure can ensure that the air is uniformly filled in the air collecting cavity 16 and then is sucked into the water column, thereby improving the air-entrapping stability.

In this embodiment, the shape of the air inlet 152 is not limited as long as the cross-sectional area thereof is 0.1 to 0.3 times the cross-sectional area of the air collecting chamber 16. The first nozzle 14 has a conical section 141 and a direct current section 142 which are sequentially connected along the water flow direction, the axial taper of the conical section 141 is 10-15 degrees, and the inner diameter of the gas collection cavity 16 is 1.5-2 times of the inner diameter of the direct current section 142. The axial length of the straight flow section 142 is 1-2 mm, and the inner diameter of a water outlet 151 of the second nozzle 15 is larger than that of the straight flow section 142. By adopting the parameters, the quantity of gas matched with the water flow can be sucked according to the self capacity of the water flow, the bubbles are prevented from being broken before reaching the object to be cleaned, and the utilization rate of the bubbles is improved.

According to the venturi effect, in the process that water flow is ejected through the first nozzle 14 and the second nozzle 15, air in the air collecting cavity 16 is sucked into a water column through the gap 10 between the first nozzle 14 and the second nozzle 15, so that air bubbles are entrained in jet flow, and the air bubbles are broken on the surfaces of dishes or fruits and vegetables to improve the dirt stripping force and improve the cleaning effect; this embodiment is through adding gas into efflux from the mode of breathing in, and need not to set up air pump etc. greatly reduced manufacturing cost.

Claims

1. A spray arm comprising a body (1) having a water spray aperture (13), characterized in that: the gas-collecting device is characterized in that a first nozzle (14) extending along the edge of the water spraying hole (13) is arranged on the outer wall of the body (1), a second nozzle (15) is arranged on the periphery of the first nozzle (14) in a surrounding mode, the second nozzle (15) is provided with a water outlet (151) corresponding to the water outlet end of the first nozzle (14), a gas collecting cavity (16) is formed between the inner wall of the second nozzle (15) and the outer wall of the first nozzle (14) in a surrounding mode, and a gas inlet hole (152) for allowing outside gas to enter the gas collecting cavity (16) is formed in the second nozzle (15).

2. The spray arm of claim 1, wherein: and a gap (10) for sucking gas into a water column is arranged between the liquid outlet end of the first nozzle (14) and the liquid inlet end of the second nozzle (15).

3. The spray arm of claim 2, wherein: the width (d) of the gap (10) is 1-5 mm.

4. The spray arm of claim 1, wherein: the cross section of the gas collection cavity (16) is U-shaped, and the gas inlet holes (152) are arranged on the side wall of the U-shaped gas collection cavity (16).

5. The spray arm of claim 4, wherein: the air inlet holes (152) are arranged corresponding to the outer side wall of the first nozzle (14).

6. The spray arm of claim 4, wherein: the cross-sectional area of the air inlet hole (152) is 0.1-0.3 times of the cross-sectional area of the air collection cavity (16).

7. The spray arm of claim 1, wherein: the first nozzle (14) is provided with a conical section (141) and a direct-current section (142) which are sequentially connected along the water flow direction, the axial taper of the conical section (141) is 10-15 degrees, and the inner diameter of the gas collection cavity (16) is 1.5-2 times of the inner diameter of the direct-current section (142).

8. The spray arm of claim 7, wherein: the axial length of the direct current section (142) is 1-2 mm, and the inner diameter of a water outlet (151) of the second nozzle (15) is larger than that of the direct current section (142).

9. The spray arm according to any one of claims 1 to 8, wherein: the water spraying device is characterized in that a flow channel (11) extending along the length direction of the body (1) is arranged in the body (1), a water inlet (12) communicated with the flow channel (11) is formed in the bottom wall of the body (1), and a water spraying hole (13) is formed in the top wall of the body (1).