CN111407205B

CN111407205B - A spray arm and a cleaning machine using the spray arm

Info

Publication number: CN111407205B
Application number: CN201910012138.6A
Authority: CN
Inventors: 徐慧; 郑峰
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-01-07
Filing date: 2019-01-07
Publication date: 2025-02-14
Anticipated expiration: 2039-01-07
Also published as: CN111407205A

Abstract

The present invention relates to a spray arm, comprising a spray arm body, a first water spray hole is arranged on the spray arm body, and a nozzle can suck gas and mix it with water flow when the first water spray hole sprays water, a gas collecting chamber connected to a gas source is arranged on the side wall of the spray arm body, the nozzle is sleeved in the first water spray hole, and a suction hole is opened on the side wall for gas in the gas collecting chamber to enter the nozzle. The present invention allows bubbles to be entrained in the sprayed water flow, and when the water flow with bubbles is sprayed toward dishes, the bubbles in the water flow contact the dishes and break and generate a large impact force, thereby dispersing the stubborn dirt on the dishes or fruits and vegetables, and achieving a better cleaning effect; at the same time, since the water flow speed is not constant with the rotation of the spray arm, this makes the amount of gas sucked into the nozzle not constant, so that the water-gas mixture is reflected in the effect of discontinuous spraying, further increasing the stripping force on the dirt and improving the cleaning effect.

Description

Spray arm and cleaning machine applying same

Technical Field

The invention relates to a spray arm and a cleaning machine using the same.

Background

With the increasing level of living of people, dish washers are increasingly entering home as household electrical appliances for kitchen use. The existing dish washers on the market are generally divided into three types, namely a desk type dish washer, a cabinet type dish washer and a trough type dish washer, wherein the desk type dish washer is of an integral independent structure and is generally placed on a table top for use, the cabinet type dish washer is also of an independent structure and is needed to be embedded into a kitchen cabinet for use, and the trough type dish washer is combined with the trough and is generally installed in the kitchen cabinet for use.

The dish washing machine of the above-mentioned various forms generally has a washing function by lifting water by a water pump and spraying the water toward dishes in a washing space. For example, the chinese patent CN97236119.7, the microcomputer light-operated full-automatic dishwasher, and the chinese patent CN00240098.7, both disclose similar structures, in which the impact force of water flow sprayed to the dishes is weak and not uniform enough, and when the number of dishes is large, the water flow cannot be covered, resulting in poor cleaning effect. The chinese patent with application number CN200710306898.5, dish washing machine, especially household dish washing machine, provided with a device for improving decontamination effect, is provided with a vaporization device for generating fluid mist which can be introduced into the cavity of the dish washing machine, so as to enlarge the washing area of the dishes and improve the uniformity of the washing medium, but the structure still cannot solve the problem of weak impact force of the sprayed water flow. The Chinese patent with the application number of 201610795828.X, namely a large-scale ultrasonic automatic dish washer, is provided with an ultrasonic emission head device, high-pressure air is input into a cleaning liquid at the same time, the input high-pressure air forms bubbles in the cleaning liquid by utilizing the ultrasonic emission head device, and an ultrasonic transducer is used for providing energy for the cleaning liquid, so that the bubbles in the cleaning liquid are broken to generate impact force, and the impact force of water flow is improved. However, in such a structure, the instantaneous cavitation phenomenon generated between the ultrasonic wave and the high-pressure air bubble needs to be maintained in water, and when the water flow is lifted by the water pump and is circularly sprayed out, the high-pressure air bubble is difficult to reach the surfaces of the dishes, and then cracks, so that the structure is not suitable for the structure of the water flow spraying type dish washer. In addition, the structure is only suitable for large-scale dish washers, and is difficult to be suitable for household dish washers.

Disclosure of Invention

The invention aims to solve the technical problem of providing a spray arm of a cleaning machine, which can form bubbles in water flow so as to increase impact strength on an object to be cleaned and improve cleaning effect.

Another technical problem to be solved by the present invention is to provide a cleaning machine using the spray arm, which can form bubbles in water flow, thereby increasing impact strength to the cleaned object and improving cleaning effect.

The spray arm comprises a spray arm body, wherein a first water spray hole is formed in the spray arm body, and the spray arm is characterized by further comprising a nozzle capable of sucking gas and mixing with water flow in a water spray state of the first water spray hole, an air collection cavity communicated with an air source is formed in the side wall of the spray arm body, and the nozzle is sleeved in the first water spray hole and provided with an air suction hole for enabling the gas in the air collection cavity to enter the nozzle.

In the above scheme, the first water spraying hole comprises a first part positioned on the side wall of the spray arm body and a second part positioned on the outer side wall of the gas collection cavity, the first part and the second part are oppositely arranged, a gap communicated with the gas collection cavity is formed between the first part and the second part, the nozzle is provided with a first plug-in part capable of being inserted into the first part and a second plug-in part capable of being inserted into the second part, and the air suction hole is arranged between the first plug-in part and the second plug-in part, and the inlet corresponds to the gap. The structure is adopted to connect the air suction hole on the nozzle with the air collection cavity.

Preferably, the inner diameter of the second part is larger than that of the first part, and a step arranged along the circumferential direction is formed at the joint of the first part and the second part.

Preferably, the air suction holes are arranged in the axial direction of the nozzle and the outlets are located on the end faces of the steps, and the outer peripheral wall of the nozzle is recessed radially inwards to form inlets of the air suction holes. By adopting the structure, water flow can be prevented from entering the air collecting cavity, so that gas in the air collecting cavity is sucked into the nozzle under the action of negative pressure generated by the water flow.

As an improvement, a guide sleeve is sleeved in the second part of the first water spraying hole, the lower end of the guide sleeve is propped against the end face of the step, and an arc face which gradually and smoothly transits upwards is formed on the lower end face of the guide sleeve from outside to inside along the radial direction. The upper edge of the cambered surface is tangent to the inner wall surface of the guide sleeve at the joint. The guide sleeve can reduce the inner diameter of the second part to a certain extent, improve the water flow speed, and make the lower end of the guide sleeve smoothly transition so as to facilitate the introduction of air flow, thereby better mixing with water flow.

In the above embodiments, the nozzle is detachably inserted into the first water spraying hole. The structure is convenient for production and assembly.

In order to facilitate connection, the inner wall of the second part of the first water spraying hole is provided with a concave ring which is arranged along the circumferential direction, and correspondingly, the outer circumferential wall of the nozzle is provided with a convex ring which can be matched and clamped with the concave ring.

Preferably, a first groove which is arranged along the circumferential direction is formed in the peripheral wall of the upper part of the nozzle, and a first sealing ring which can be propped against the inner wall of the second part of the first water spraying hole is arranged in the first groove. The outer peripheral wall of the lower part of the nozzle is provided with a second groove which is arranged along the circumferential direction, and a second sealing ring which can be propped against the inner wall of the first part of the first water spraying hole is arranged in the second groove. This structure prevents water flow from entering the gas collection chamber.

In each scheme, the spray arm is also provided with a second water spray hole positioned at the periphery of the gas collection cavity. The second water spray hole is not communicated with the air collecting cavity, is an existing common water spray hole, and can be matched with the first water spray hole to improve the cleaning effect.

The cleaning machine with the spray arm comprises a box body, the spray arm and a driving mechanism for driving the spray arm to rotate, wherein the box body is provided with a washing cavity, the spray arm is rotatably arranged in the box body, the spray arm is hollow inside to form a water collecting cavity, a water inlet communicated with the water collecting cavity is formed in the side wall of the spray arm, the driving mechanism comprises a motor and an impeller, the upper part of the impeller is rotatably arranged in the water collecting cavity, the lower part of the impeller penetrates through the water inlet and is positioned outside the spray arm, and the motor is arranged outside the box body and a motor shaft penetrates through the box body to be connected with the impeller.

The cleaning machine further comprises an air-filling structure capable of providing an air source for the air-collecting cavity, the air-filling structure comprises an air pump and an air duct, the air pump is arranged on the outer side of the box body, the air inlet end of the air duct is connected with the air pump, and the air outlet end of the air duct is connected with the air inlet end of the motor shaft.

Compared with the prior art, the invention has the advantages that the gas collecting cavity is arranged on the side wall of the spray arm body, the nozzle capable of sucking the gas of the gas collecting cavity and mixing the water flow in a water spraying state is arranged on the first water spraying hole, so that bubbles are entrained in the sprayed water flow, when the water flow mixed with the bubbles sprays toward the dishes, the bubbles in the water flow contact the dishes to break and generate larger impact force, so that stubborn dirt on the dishes or vegetables and fruits is dispersed, better cleaning effect is achieved, and meanwhile, the water flow speed is not constant along with the rotation of the spray arm, so that the gas quantity sucked into the nozzle is not constant, the water-gas mixture is in a discontinuous spraying effect, the stripping force on the dirt is further increased, and the cleaning effect is improved.

Drawings

FIG. 1 is a schematic view of an installation structure of a cleaning machine according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a schematic view of a nozzle according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an assembly structure of a nozzle and a spray arm body according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1-5, the spray arm 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 11, a first water spraying hole 12 and a second water spraying hole 13 which are communicated with the water storage cavity 11 are formed on an upper wall surface of the spray arm body 1, and a water inlet 14 which is communicated with the water storage cavity 11 is formed on a lower wall surface of the spray arm body 1. The side wall of the spray arm body 1 is provided with an air collecting cavity 15 communicated with an air source, the nozzle 2 is sleeved in the first water spraying hole 12, the side wall of the nozzle 2 is provided with an air suction hole 21 for enabling air in the air collecting cavity 15 to enter the nozzle 2, so that the air is sucked and mixed with water flow due to negative pressure in the water spraying state of the first water spraying hole 12, and bubbles are entrained in the sprayed water flow. The second water spraying holes 13 are positioned at the periphery of the air collecting cavity 15, the second water spraying holes 13 are not communicated with the air collecting cavity 15, are existing common water spraying holes, and can be matched with the first water spraying holes 12 to improve the cleaning effect.

The first water spraying hole 12 of the present embodiment includes a first portion 121 located on a side wall of the spray arm body 1 and a second portion 122 located on an outer side wall of the air collecting chamber 15, the first portion 121 and the second portion 122 are opposite and coaxially arranged, a gap 123 communicating with the air collecting chamber 15 is formed between the first portion 121 and the second portion 122, the nozzle 2 has a first plug-in portion 22 capable of being inserted into the first portion 121 and a second plug-in portion 23 capable of being inserted into the second portion 122, the air suction hole 21 is opened between the first plug-in portion 22 and the second plug-in portion 23, and the inlet 211 is arranged corresponding to the gap 123, so that the air suction hole 21 on the nozzle 2 is connected with the air collecting chamber 15. The second portion 122 has an inner diameter larger than that of the first portion 121, and a step 124 is formed at the junction of the first portion 121 and the second portion 122 in a circumferential direction. The suction holes 21 are arranged in the axial direction of the nozzle 2 with the outlets 212 on the end face of the above-described step 124, and the outer peripheral wall of the nozzle 2 is recessed radially inward to form the inlets 211 of the suction holes 21. The suction holes 21 are plural and arranged at intervals in the circumferential direction of the nozzle 2. The above structure can prevent water flow from entering the air collecting cavity 15, so that air in the air collecting cavity 15 is sucked into the nozzle 2 under the action of negative pressure generated by water flow.

The second portion 122 of the first water spraying hole 12 of the present embodiment is internally provided with a guide sleeve 125, the lower end of the guide sleeve 125 abuts against the end surface of the step 124, and the lower end surface of the guide sleeve 125 is radially formed with an arc surface 1251 gradually and smoothly transiting upwards from outside to inside. The upper edge of the arc 1251 is tangent to the inner wall surface of the guide sleeve 125 at the junction. The guide sleeve 125 is provided to reduce the inner diameter of the second portion 122 to some extent to increase the water flow rate, so that the smooth transition of the lower end of the guide sleeve 125 facilitates the introduction of the air flow to better mix with the water flow.

The nozzle 2 of the present embodiment is detachably inserted into the first water spraying hole 12 for easy production and assembly. For convenience of connection, the inner wall of the second portion 122 of the first water spraying hole 12 is provided with a concave ring 1221 arranged along the circumferential direction, and correspondingly, the outer circumferential wall of the nozzle 2 is provided with a convex ring 24 which can be matched and clamped with the concave ring 1221. The outer peripheral wall of the upper part of the nozzle 2 is provided with a first groove 25 arranged along the circumferential direction, and a first sealing ring 26 which can be propped against the inner wall of the second part 122 of the first water spraying hole 12 is arranged in the first groove 25. The lower peripheral wall of the nozzle 2 is provided with a second groove 27 arranged along the circumferential direction, and a second sealing ring 28 capable of abutting against the inner wall of the first part 121 of the first water spraying hole 12 is arranged in the second groove 27, so that water flow can be prevented from entering the air collecting cavity 15.

The cleaning machine with the spray arm in this embodiment includes a box 3, a spray arm body 1 and a driving mechanism 4 for driving the spray arm body 1 to rotate, the box 3 has a washing cavity and is installed on a cabinet table top 100, the spray arm body 1 is rotatably arranged in the box 3, the spray arm body 1 is hollow to form a water collecting cavity 10, a water inlet 14 communicated with the water collecting cavity 10 is formed in the side wall of the spray arm body 1, the driving mechanism 4 includes a motor 41 and an impeller 42, the upper part of the impeller 42 is rotatably arranged in the water collecting cavity 10, the lower part of the impeller 42 passes through the water inlet 16 to be located outside the spray arm body 1, the motor 41 is arranged outside the box 1, and a motor shaft 411 passes through the box 1 to be connected with the impeller 42. The motor shaft 411 is hollow, the first end of the motor shaft 411 is an air inlet end arranged outside the box body 1, and the second end of the motor shaft 411 is an air outlet end communicated with the air collecting cavity 15. The cleaning machine further comprises an air-filling structure 5 which can provide an air source for the air-collecting cavity 15, the air-filling structure 5 comprises an air pump 51 and an air duct 52, the air pump 51 is arranged on the outer side of the box body 1, the air inlet end of the air duct 52 is connected with the air pump 51, and the air outlet end of the air duct 52 is connected with the air inlet end of the motor shaft 411.

In this embodiment, the side wall of the spray arm body 1 is provided with the air collecting cavity 15, the first water spraying hole 12 is provided with the nozzle 2 capable of sucking the air in the air collecting cavity 15 into the water flow in a water spraying state, when the water flow passes through the nozzle 2, negative pressure is generated at the upper part of the nozzle, so that the air is sucked into the nozzle 2 from the air collecting cavity 15 through the air suction hole 21, bubbles are entrained in the sprayed water flow, when the water flow mixed with the bubbles is sprayed to the dishes, the bubbles in the water flow contact the dishes and generate larger impact force, so that the dishes or vegetables are scattered with stubborn dirt, and a better cleaning effect is achieved, meanwhile, as the spray arm rotates, the water flow speed is not constant, the air quantity sucked into the nozzle 2 is not constant, so that the water-air mixture is a discontinuous spraying effect, the stripping force on dirt is further increased, and the cleaning effect is improved.

Claims

1. The spray arm comprises a spray arm body (1), wherein a first water spray hole (12) is formed in the spray arm body (1), and the spray arm is characterized by further comprising a nozzle (2) capable of sucking gas and mixing with water flow in a water spray state of the first water spray hole (12), an air collection cavity (15) communicated with an air source is formed in the side wall of the spray arm body (1), the nozzle (2) is sleeved in the first water spray hole (12), and an air suction hole (21) for allowing the gas in the air collection cavity (15) to enter the nozzle (2) is formed in the side wall of the spray arm body;

The first water spraying hole (12) comprises a first part (121) positioned on the side wall of the spray arm body (1) and a second part (122) positioned on the outer side wall of the air collecting cavity (15), the first part (121) and the second part (122) are oppositely arranged, a gap (123) communicated with the air collecting cavity (15) is formed between the first part (121) and the second part (122), the nozzle (2) is provided with a first inserting part (22) capable of being inserted into the first part (121) and a second inserting part (23) capable of being inserted into the second part (122), the air suction hole (21) is formed between the first inserting part (22) and the second inserting part (23), and the inlet (211) is arranged corresponding to the gap (123);

The inner diameter of the second part (122) is larger than that of the first part (121), a step (124) which is arranged along the circumferential direction is formed at the joint of the first part (121) and the second part (122), the air suction hole (21) is arranged along the axial direction of the nozzle (2), and the outlet (212) is positioned on the end face of the step (124).

2. The shower arm according to claim 1, wherein a guide sleeve (125) is disposed in the second portion (122) of the first water spraying hole (12), a lower end of the guide sleeve (125) abuts against an end surface of the step (124), and an arc surface (1251) gradually and smoothly transiting upwards is formed on a lower end surface of the guide sleeve (125) from outside to inside in a radial direction.

3. The spray arm according to claim 2, wherein the outer circumferential wall of the nozzle (2) is recessed radially inwards to form an inlet (212) for the suction orifice (21).

4. The spray arm of claim 2, wherein the upper edge of the arcuate surface (1251) is tangent to the inner wall surface of the guide sleeve (125) at a junction.

5. The spray arm according to any one of claims 1 to 4, wherein the nozzle (2) is detachably inserted into the first water jet hole (12).

6. The shower arm according to claim 5, wherein the inner wall of the second portion (122) of the first water spraying hole (12) is provided with a concave ring (1221) circumferentially arranged, and a convex ring (24) capable of being matched and clamped with the concave ring (1221) is correspondingly formed on the outer circumferential wall of the nozzle (2).

7. The spray arm of claim 6, wherein the outer peripheral wall of the upper portion of the nozzle (2) is provided with a first groove (25) circumferentially arranged, and a first sealing ring (26) capable of abutting against the inner wall of the second portion (122) of the first water spraying hole (12) is arranged in the first groove (25).

8. The spray arm of claim 6, wherein a second groove (27) is formed in the peripheral wall of the lower portion of the nozzle (2), and a second seal ring (28) capable of abutting against the inner wall of the first portion (121) of the first water spraying hole (12) is arranged in the second groove (27).

9. The spray arm according to any one of claims 1 to 4, wherein the spray arm body (1) is further provided with second water spray holes (13) located at the periphery of the air collection cavity (15).

10. The cleaning machine with the spray arm of any one of claims 1-9 comprises a box body (3), the spray arm and a driving mechanism (4) for driving the spray arm to rotate, wherein the box body (3) is provided with a washing cavity, the spray arm can be rotationally arranged in the box body (3), the spray arm is hollow inside to form a water collecting cavity (10), a water inlet (16) communicated with the water collecting cavity (10) is formed in the side wall of the spray arm, the driving mechanism (4) comprises a motor (41) and an impeller (42), the upper part of the impeller (42) can be rotationally arranged in the water collecting cavity (10), the lower part of the impeller (42) penetrates through the water inlet (16) to be located outside the spray arm, and a motor shaft (411) is arranged outside the box body (3) and is connected with the impeller (42) through the box body (3).

11. The spray arm of claim 10, further comprising an air-filling structure (5) capable of providing an air source for the air collection cavity (15), wherein the air-filling structure (5) comprises an air pump (51) and an air duct (52), the air pump (51) is arranged on the outer side of the box body (3), the air inlet end of the air duct (52) is connected with the air pump (51), and the air outlet end of the air duct (52) is connected with the air inlet end of the motor shaft (411).