阅读说明：本技术 一种清洗机的喷淋臂 (Spray arm of cleaning machine ) 是由 徐慧 郑峰 茅忠群 诸永定 于 2018-09-06 设计创作，主要内容包括：本发明涉及一种清洗机的喷淋臂,包括喷淋臂本体,该喷淋臂本体上设置有喷水孔,还包括能在喷水孔喷水状态下将气体吸入并与水流混合的喷嘴,该喷嘴下部套置在喷水孔外并形成有供气体进入的吸气腔,喷嘴上开有供气体进入吸气腔的吸气口,喷嘴上部形成有供水气混合物喷出的喷口。本发明在喷淋臂的喷水孔上设置了能在喷水状态下将气体吸入并与水流混合的喷嘴,使喷出的水流中夹带气泡,达到更好的清洗效果；同时,由于本发明无需设置有源动力加气结构,随着喷淋臂的转动,水流速度并不恒定,这就使得吸入吸气腔中的气体量是不恒定的,从而使得水气混合物体现为一股一股不连续喷出的效果,进一步增大了对污物的剥离力,提高了清洗效果。(The invention relates to a spray arm of a cleaning machine, which comprises a spray arm body, wherein the spray arm body is provided with a water spray hole, the spray arm further comprises a nozzle which can suck gas and mix the gas with water flow in the water spray state of the water spray hole, the lower part of the nozzle is sleeved outside the water spray hole and is provided with a gas suction cavity for the gas to enter, the nozzle is provided with a gas suction port for the gas to enter the gas suction cavity, and the upper part of the nozzle is provided with a nozzle for spraying a water-gas mixture. The spray holes of the spray arms are provided with the nozzles which can suck gas and mix the gas with water flow in a water spraying state, so that bubbles are carried in the sprayed water flow, and a better cleaning effect is achieved; meanwhile, an active power air-entrapping structure is not needed, and the water flow speed is not constant along with the rotation of the spraying arm, so that the amount of gas sucked into the air suction cavity is not constant, the water-gas mixture is reflected into a discontinuous ejecting effect, the stripping force on dirt is further increased, and the cleaning effect is improved.)

1. The utility model provides a spray arm of cleaning machine, includes spray arm body (1), is provided with hole for water spraying (12) on this spray arm body (1), its characterized in that: the gas mixing device further comprises a nozzle (2) which can suck gas and mix the gas with water flow in a water spraying state of the water spraying hole (12), the lower portion of the nozzle (2) is sleeved outside the water spraying hole (12) and is provided with a gas suction cavity (21) for the gas to enter, a gas suction port (22) for the gas to enter the gas suction cavity (21) is formed in the nozzle (2), and a nozzle (23) for spraying a water-gas mixture is formed in the upper portion of the nozzle (2).

2. The spray arm of a cleaning machine of claim 1, wherein: and a flow guide seat (121) extending outwards is formed on the water spraying hole (12), and the lower part of the nozzle (2) is sleeved on the periphery of the flow guide seat (121).

3. The spray arm of a cleaning machine of claim 2, wherein: an assembly cavity (24) capable of being sleeved on the periphery of the flow guide seat (121) is formed in the hollow part of the lower part of the nozzle (2), and in an assembly finished state, a gap is formed between the upper part of the assembly cavity (24) and the upper part and the top of the flow guide seat (121), namely the air suction cavity (21).

4. The spray arm of a cleaning machine of claim 3, wherein: the nozzle (23) is smaller than the inner diameter of the air suction cavity (21) and extends upwards from the air suction cavity (21), a first platform (25) is formed between the periphery of the nozzle (23) and the peripheral wall of the top of the air suction cavity (21), and the air suction port (22) is arranged on the first platform (25) and communicated with the air suction cavity (21).

5. The spray arm of a cleaning machine of claim 4, wherein: the inner diameter of the upper part of the air suction cavity (21) is gradually reduced from bottom to top to form a first inclined plane (211), and the lower port of the air suction port (22) is positioned on the first inclined plane (211).

6. The spray arm of a cleaning machine of claim 5, wherein: the outer diameter of the middle part of the flow guide seat (121) is reduced to form a second platform (122), the middle part of the second platform (122) is formed with an extending part (123) extending upwards, the upper part of the extending part (123) is formed with a third inclined surface (124) with the outer diameter gradually reduced from bottom to top, and the distance between the third inclined surface (124) and the first inclined surface (211) is gradually reduced from bottom to top.

7. The spray arm of a cleaning machine according to any one of claims 1 to 6, characterized in that: the inner diameter of the water spray hole (12) is gradually reduced from bottom to top, and the ratio of the inner diameter of the water outlet end of the water spray hole (12) to the inner diameter of the nozzle (23) of the nozzle (2) is 1 (1.2-3).

8. The spray arm of a cleaning machine according to any one of claims 1 to 6, characterized in that: the distance between the upper end of the water spray hole (12) and the upper end of the nozzle spout (23) is 5-50 mm.

9. The spray arm of a cleaning machine according to any one of claims 3 to 6, characterized in that: the outer peripheral wall of water conservancy diversion seat (121) lower part is provided with along protruding circle (125) that circumference was arranged, and is corresponding, offer on the internal wall of assembly chamber (24) along circumference arrange and can correspond draw-in groove (241) of joint with protruding circle (125).

10. The spray arm of a cleaning machine according to any one of claims 1 to 6, characterized in that: a second inclined plane (212) with the inner diameter gradually reduced from bottom to top is arranged between the top of the air suction cavity (21) and the nozzle (23), and the second inclined plane (212) is in smooth transition with the inner walls of the air suction cavity (21) and the nozzle (23).

11. The spray arm of a cleaning machine of claim 10, wherein: the second inclined plane (212) and the lower part of the nozzle (23) jointly form a water-gas mixing area (20).

Technical Field

The invention relates to a spray arm of a cleaning machine.

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.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a spray arm of a cleaning machine, which can form bubbles in water flow without an active power mechanism, thereby increasing the impact strength on a cleaned object and improving the cleaning effect.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a spray arm of cleaning machine, includes the spray arm body, is provided with hole for water spraying on this spray arm body, its characterized in that: the gas-water mixing device also comprises a nozzle which can suck gas and mix the gas with water flow in a water spraying state of the water spraying hole, the lower part of the nozzle is sleeved outside the water spraying hole and is provided with a gas suction cavity for the gas to enter, the nozzle is provided with a gas suction port for the gas to enter the gas suction cavity, and the upper part of the nozzle is provided with a nozzle for spraying a water-gas mixture.

In order to facilitate assembly, a flow guide seat extending outwards is formed on the water spraying hole, and the lower part of the nozzle is sleeved on the periphery of the flow guide seat.

Preferably, the lower part of the nozzle is hollow and provided with an assembly cavity which can be sleeved on the periphery of the flow guide seat, and in an assembled state, a gap is formed between the upper part of the assembly cavity and the upper part and the top of the flow guide seat, namely the air suction cavity. The clearance is convenient for making gas enter the air suction cavity from the air suction port and enter the nozzle to be mixed with water flow, so that a water-gas mixture carrying bubbles is generated, and the cleaning effect is improved.

Preferably, the diameter of the nozzle is smaller than the inner diameter of the air suction cavity and extends upwards from the air suction cavity, a first platform is formed between the periphery of the nozzle and the peripheral wall of the top of the air suction cavity, and the air suction port is arranged on the first platform and communicated with the air suction cavity. Preferably, the inner diameter of the upper part of the air suction cavity is gradually reduced from bottom to top to form a first inclined plane, and the lower port of the air suction port is positioned on the first inclined plane. The suction ports are arranged in the axial direction of the suction chamber. This configuration facilitates rapid intake of gas into the suction chamber.

Preferably, the outer diameter of the middle part of the guide seat is reduced to form a second platform, the middle part of the second platform is formed with an extension part extending upwards, the upper part of the extension part is formed with a third inclined plane of which the outer diameter is gradually reduced from bottom to top, and the distance between the third inclined plane and the first inclined plane is gradually reduced from bottom to top. This structure is favorable to gaseous suction to, make gaseous before getting into aqueous vapor mixing zone have an acceleration process, be favorable to aqueous vapor to mix rapidly, and produce the pulse effect, improve the peel strength to the filth, and then improve the cleaning performance.

In each scheme, the inner diameter of the water spraying hole is gradually reduced from bottom to top, and the ratio of the inner diameter of the water outlet end of the water spraying hole to the inner diameter of the nozzle opening of the nozzle is 1 (1.2-3). Too big ratio can lead to the delivery port area not enough, and then leads to rivers from the induction port blowout, loses the effect of drawing the gas, and the ratio of undersize can lead to drawing the effect weak for the unable intensive mixing of aqueous vapor, through a large amount of tests verification, adopts above-mentioned parameter, can obtain better draw when establishing gaseous effect, makes gaseous and rivers intensive mixing.

Preferably, the distance between the upper end of the water spraying hole and the upper end of the nozzle is 5-50 mm. Too short distance can lead to the unable intensive mixing of aqueous vapor, and too big distance can lead to the velocity of water loss too big, all can influence the cleaning performance, adopts above-mentioned parameter, can obtain excellent washing performance.

In order to facilitate assembly, a convex ring arranged along the circumferential direction is arranged on the circumferential wall of the lower part of the flow guide seat, correspondingly, a clamping groove which is arranged along the circumferential direction and can be clamped with the convex ring correspondingly is formed in the inner wall surface of the assembly cavity.

Preferably, a second inclined plane with the inner diameter gradually reduced from bottom to top is arranged between the top of the air suction cavity and the nozzle, and the second inclined plane smoothly transitions with the inner walls of the air suction cavity and the nozzle. The second inclined plane and the lower part of the nozzle jointly form a water-gas mixing area. The structure provides diffusion guiding function for water flow and gas, and is beneficial to the full mixing of the water flow and the gas.

Compared with the prior art, the invention has the advantages that: the spray holes of the spray arms are provided with the nozzles which can suck gas and mix the gas with water flow in a water spraying state, so that bubbles are entrained in the sprayed water flow, and when the water flow is sprayed to dishes together with the bubbles, the bubbles in the water flow are contacted with the dishes to be broken and generate larger impact force, thereby dispersing stubborn dirt on the dishes or vegetables and fruits and achieving a better cleaning effect; meanwhile, an active power air-entrapping structure is not needed, and the water flow speed is not constant along with the rotation of the spraying arm, so that the amount of gas sucked into the air suction cavity is not constant, the water-gas mixture is reflected into a discontinuous ejecting effect, the stripping force on dirt is further increased, and the cleaning effect is improved.

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 schematic view of portion A of FIG. 2;

fig. 4 is an exploded view of fig. 3.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 4, the spray arm of the cleaning machine of the present embodiment includes a spray arm body 1 and a nozzle 2, the spray arm body 1 is hollow to form a water storage cavity 10, and the spray arm body 1 is provided with a water inlet 11 and a water spraying hole 12 communicated with the water storage cavity 10. The water inlet 11 is opened on the lower surface of the spray arm body 1 and is located at the central part of the spray arm body 1, the plurality of water spray holes 12 are arranged on the upper surface of the spray arm body 1 at intervals, and the nozzles 2 are arranged on the water spray holes 12 and are used for sucking gas and mixing the gas with water flow under the water spray state of the water spray holes 12, so that bubbles are entrained in the sprayed water flow.

The lower part of the nozzle 2 of the embodiment is sleeved outside the water spray hole 12 and is provided with an air suction cavity 21 for air to enter, the nozzle 2 is provided with an air suction port 22 for air to enter the air suction cavity 21, and the upper part of the nozzle 2 is provided with a nozzle 23 for spraying the water-air mixture. For the convenience of assembly, the water spray hole 12 is formed with a guide seat 121 extending outward, and the lower portion of the nozzle 2 is fitted around the outer circumference of the guide seat 121. The lower part of the nozzle 2 is hollow and provided with an assembly cavity 24 which can be sleeved on the periphery of the guide seat 121, the inner wall surface of the lower part of the assembly cavity 24 is close to the outer wall surface of the guide seat 121 in the assembled state, and a gap is formed between the upper part of the assembly cavity 24 and the upper part and the top of the guide seat 121, and the gap forms the air suction cavity 21. The gap facilitates the air to enter the air suction cavity 21 from the air suction port 22 and enter the nozzle 23 to be mixed with the water flow, so as to generate the water-air mixture carrying bubbles and improve the cleaning effect.

In this embodiment, the nozzle 23 has a diameter smaller than the inner diameter of the suction chamber 21 and extends upward from the suction chamber 21, a first platform 25 is formed between the outer periphery of the nozzle 23 and the outer peripheral wall of the top of the suction chamber 21, and the suction port 22 is opened on the first platform 25 and communicates with the suction chamber 21. The inner diameter of the upper part of the air suction cavity 21 is gradually reduced from bottom to top to form a first inclined surface 211, the air suction port 22 is arranged along the axial direction of the air suction cavity 21, and the lower port of the air suction port 22 is positioned on the first inclined surface 211, so that the air can be sucked into the air suction cavity 21 quickly. The middle part of the guide seat 121 is formed with a second platform 122 with a decreasing outer diameter, the middle part of the second platform 122 is formed with an extension 123 extending upwards, the upper part of the extension 123 is formed with a third inclined surface 124 with a decreasing outer diameter from bottom to top, and the distance between the third inclined surface 124 and the first inclined surface 211 decreases from bottom to top. This structure is favorable to gaseous suction to, make gaseous before getting into aqueous vapor mixing zone have an acceleration process, be favorable to aqueous vapor to mix rapidly, and produce the pulse effect, improve the peel strength to the filth, and then improve the cleaning performance. A second inclined plane 212 with the inner diameter gradually reduced from bottom to top is arranged between the top of the air suction cavity 21 and the nozzle 23, and the second inclined plane 212 smoothly transitions with the inner walls of the air suction cavity 21 and the nozzle 23. The second inclined surface 212 and the lower part of the nozzle 23 together form a water-gas mixing area 20, which provides diffusion guiding function for water flow and gas, and is beneficial to the full mixing of the water flow and the gas.

In the embodiment, the inner diameter of the water spray hole 12 is gradually reduced from bottom to top, and the ratio of the inner diameter of the water outlet end of the water spray hole 12 to the inner diameter of the nozzle 23 of the nozzle 2 is 1 (1.2-3), preferably 1: 1.5. Too big ratio can lead to the delivery port area not enough, and then leads to rivers from the induction port blowout, loses the effect of drawing the gas, and the ratio of undersize can lead to drawing the effect weak for the unable intensive mixing of aqueous vapor, through a large amount of tests verification, adopts above-mentioned parameter, can obtain better draw when establishing gaseous effect, makes gaseous and rivers intensive mixing. The distance between the upper end of the water spray hole 12 and the upper end of the nozzle spout 23 is 5-50 mm. Too short distance can lead to the unable intensive mixing of aqueous vapor, and too big distance can lead to the velocity of water loss too big, all can influence the cleaning performance, adopts above-mentioned parameter, can obtain excellent washing performance.

In order to facilitate assembly, a convex ring 125 arranged along the circumferential direction is arranged on the outer circumferential wall of the lower portion of the flow guide seat 121, and correspondingly, a clamping groove 241 arranged along the circumferential direction and capable of being correspondingly clamped with the convex ring 125 is formed in the inner wall surface of the assembly cavity 24.

In the embodiment, the spray holes 12 of the spray arm are provided with the nozzles 2 which can suck gas and mix with water flow under the water spraying state, so that bubbles are entrained in the sprayed water flow, and when the water flow is sprayed to dishes due to the bubbles, the bubbles in the water flow are contacted with the dishes to be broken and generate larger impact force, thereby dispersing stubborn dirt on the dishes or vegetables and fruits and achieving better cleaning effect; meanwhile, the active power air-entrapping structure is not needed to be arranged in the embodiment, and the water flow speed is not constant along with the rotation of the spraying arm, so that the amount of gas sucked into the air suction cavity 21 is not constant, the water-gas mixture has a discontinuous ejection effect, the stripping force on dirt is further increased, and the cleaning effect is improved.