CN111407205A - A spray arm and a cleaning machine using the spray arm - Google Patents

Abstract

The invention relates to a spray arm, which comprises a spray arm body, wherein a first water spray hole is formed in the spray arm body, the spray arm body further comprises a nozzle which can suck gas and mix the gas with water flow in the state that the first water spray hole sprays water, a gas collection cavity communicated with a gas source is formed in the side wall of the spray arm body, the nozzle is sleeved in the first water spray hole, and a gas suction hole for allowing the gas in the gas collection cavity to enter the nozzle is formed in the side wall of the spray arm body. The invention leads the sprayed water flow to carry bubbles, when the water flow mixed with the bubbles is sprayed to the dishes, the bubbles in the water flow contact 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, as the water flow speed is not constant along with the rotation of the spray arm, the gas quantity sucked into the nozzle is not constant, so that the water-gas mixture has a discontinuous spraying effect, the stripping force on dirt is further increased, and the cleaning effect is improved.

Description

A spray arm and a cleaning machine using the spray arm

technical field

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

Background technique

With the increasing improvement of people's living standards, dishwashers, as a kitchen appliance product, are increasingly entering the family. At present, dishwashers on the market are generally divided into three types: desktop type, cabinet type, and tank type. Among them, the desktop dishwasher is an integral independent structure, which is generally placed on the countertop for use; the cabinet type dishwasher is also an independent structure. , but it needs to be embedded in the kitchen cabinet; the trough dishwasher is combined with the sink and is generally installed in the kitchen cabinet.

The above-mentioned various types of dishwashers generally use a water pump to lift water and spray it to the dishes in the washing space to achieve the cleaning effect. For example, Chinese Patent Application No. CN97236119.7 "Microcomputer Light-Controlled Automatic Dishwasher" and Chinese Patent Application No. CN00240098.7 "A Dishwasher" both disclose similar structures. The impact force of the water flow to the dishes is weak and not uniform. When there are many dishes, it cannot be covered by the water flow, resulting in poor cleaning effect. The Chinese patent with the application number CN200710306898.5 "Dishwasher with a device for improving the decontamination effect, especially a domestic dishwasher" is provided with a vaporization device for generating a fluid mist that can be introduced into the cavity of the dishwasher , in order to expand the cleaning area sprayed to the dishes and improve the uniformity of the cleaning medium, but this type of structure still cannot solve the problem of weak impact force of the sprayed water. The Chinese patent "A Large-scale Ultrasonic Automatic Dishwasher" with the application number of 201610795828.X is equipped with an ultrasonic transmitter device, and at the same time, high-pressure air is input into the cleaning liquid, and the input high-pressure air is injected into the cleaning liquid by the ultrasonic transmitter device. To form bubbles, the ultrasonic transducer is used to provide energy to the cleaning fluid, so that the bubbles in the cleaning fluid burst to generate impact, thereby increasing the impact force of the water flow. However, in this type of structure, the instantaneous air explosion between ultrasonic waves and high-pressure air bubbles needs to be maintained in water. When the water flow is lifted by the water pump and sprayed in a circular manner, the high-pressure air bubbles are difficult to reach the surface of the dishes and burst, which is not suitable for water flow. Jet type dishwasher structure. In addition, this type of structure is only suitable for large-scale dishwashers, and is difficult to apply to domestic dishwashers.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a spray arm of a cleaning machine which can form air bubbles in the water flow to increase the impact strength on the object to be cleaned and improve the cleaning effect.

Another technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned spray arm in view of the current state of the art, which can form air bubbles in the water flow, thereby increasing the impact strength on the object to be cleaned so as to Improved cleaning effect.

The technical solution adopted by the present invention to solve the above technical problems is: a spray arm, comprising a spray arm body, the spray arm body is provided with a first water spray hole, and is characterized in that: it also includes a spray arm capable of being installed in the first spray arm. A nozzle that sucks gas in and mixes with water flow in the state of water spraying from the water hole, the side wall of the spray arm body is provided with a gas collecting cavity that communicates with the gas source, and the nozzle is sleeved in the first water spray hole A suction hole for the gas in the gas collecting cavity to enter the nozzle is opened on the side wall.

In the above solution, the first water spray hole includes a first part located on the side wall of the spray arm body and a second part located on the outer side wall of the gas collecting cavity, the first part and the second part are arranged opposite to each other and both A gap communicated with the air collecting cavity is formed therebetween, the nozzle has a first plug part which can be inserted in the first part and a second plug part which can be inserted in the second part, the suction The hole is opened between the first plug portion and the second plug portion, and the inlet is arranged corresponding to the above-mentioned gap. With such a structure, the suction hole on the nozzle is connected with the gas collecting chamber.

Preferably, the inner diameter of the second part is larger than the inner diameter of the first part, and steps arranged in the circumferential direction are formed at the junction of the first part and the second part.

Preferably, the suction holes are arranged along the axial direction of the nozzle and the outlet is located on the end surface of the step, and the outer peripheral wall of the nozzle is recessed radially inward to form the inlet of the suction hole. By adopting such a structure, the water flow can be prevented from entering the air collecting chamber, so that the gas in the air collecting chamber can be sucked into the nozzle under the action of the negative pressure generated by the passing of the water flow.

As an improvement, a guide sleeve is sleeved inside the second part of the first water spray hole, the lower end of the guide sleeve is in contact with the end surface of the step, and the lower end surface of the guide sleeve is formed radially from the outside to the inside There are arcs with a gradual upward smooth transition. The upper edge of the arc surface is tangent to the inner wall surface of the guide sleeve at the connection point. The provision of 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 make a smooth transition to facilitate the introduction of air flow, thereby better mixing with the water flow.

In each of the above solutions, the nozzle is detachably inserted in the first water spray hole. Such a structure is convenient for production and assembly.

In order to facilitate connection, the inner wall of the second part of the first water spray hole has a concave ring arranged in the circumferential direction. Correspondingly, a convex ring that can be matched with the concave ring is formed on the outer peripheral wall of the nozzle. .

Preferably, the outer peripheral wall of the upper part of the nozzle is provided with a first groove arranged in the circumferential direction, and a first sealing ring capable of abutting against the inner wall of the second part of the first water spray hole is arranged in the first groove. The outer peripheral wall of the lower part of the nozzle is provided with a second groove arranged in the circumferential direction, and a second sealing ring which can abut against the inner wall of the first part of the first water spray hole is arranged in the second groove. This structure prevents water flow from entering the plenum.

In each of the above solutions, the spray arm is further provided with a second water spray hole located at the periphery of the air collecting cavity. The second water spray hole is not communicated with the air collecting cavity, and is an existing ordinary water spray hole, which can cooperate with the first water spray hole to improve the cleaning effect.

A washing machine applied with the above-mentioned spray arm, comprising a box body, the spray arm and a driving mechanism for driving the spray arm to rotate, the box body has a washing cavity, and the spray arm can rotate Set in the box, the inside of the spray arm is hollow to form a water collection cavity, the side wall of the spray arm is provided with a water inlet that communicates with the water collection cavity, and the drive mechanism includes 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 is located outside the spray arm through the water inlet, the motor is arranged outside the box and the motor shaft is connected to the impeller through the box body. The motor shaft is hollow inside, the first end of the motor shaft is an air intake end arranged outside the box, and the second end of the motor shaft is an air outlet end communicated with the air collecting cavity.

The cleaning machine also includes an air filling structure that can provide an air source for the air collecting cavity. The air filling structure includes an air pump and an air guide pipe. The air pump is arranged outside the box body. 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 advantages of the present invention lie in that: the present invention is provided with a gas collecting cavity on the side wall of the spray arm body, and a gas collecting cavity is set on the first water spray hole which can be The gas is sucked into the nozzle mixed with the water flow, so that air bubbles are entrained in the sprayed water flow. When the water flow is sprayed to the dishes, the air bubbles in the water flow contact the dishes and rupture and generate a large impact force, so that the bowl will be broken. There are stubborn dirt on the dishes or vegetables and fruits to be washed away to achieve a better cleaning effect; at the same time, due to the rotation of the spray arm, the water flow speed is not constant, which makes the amount of gas sucked into the nozzle is not constant, so The water-air mixture is reflected in the effect of continuous spraying, which further increases the peeling force for dirt and improves the cleaning effect.

Description of drawings

Fig. 1 is the installation structure schematic diagram of the cleaning machine in the embodiment of the present invention;

Fig. 2 is the partial structure schematic diagram of Fig. 1;

Fig. 3 is the sectional view of Fig. 2;

4 is a schematic structural diagram of a nozzle in an embodiment of the present invention;

FIG. 5 is a schematic diagram of an assembly structure of a nozzle and a spray arm body in an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

As shown in FIGS. 1 to 5 , the spray arm of this embodiment includes a spray arm body 1 and a nozzle 2 , the spray arm body 1 is hollow inside to form a water storage cavity 11 , and the upper wall of the spray arm body 1 is open There are a first water spray hole 12 and a second water spray hole 13 communicated with the water storage cavity 11 , and a water inlet 14 communicated with the water storage cavity 11 is opened on the lower wall of the spray arm body 1 . The side wall of the spray arm body 1 is provided with a gas collection chamber 15 that communicates with the gas source, the nozzle 2 is sleeved in the first water spray hole 12, and the side wall of the nozzle 2 is provided with the gas in the gas collection chamber 15. Entering the suction hole 21 in the nozzle 2, the first water spray hole 12 sucks the gas due to negative pressure and mixes it with the water flow under the water spraying state, so that air bubbles are entrained in the sprayed water flow. The second water spray holes 13 are located at the periphery of the air collecting cavity 15. The second water spray holes 13 are not communicated with the air collecting cavity 15. They are the existing ordinary water spray holes and can cooperate with the first water spray holes 12 to improve the cleaning effect.

The first water spray hole 12 in this embodiment includes a first part 121 located on the side wall of the spray arm body 1 and a second part 122 located on the outer side wall of the air collecting cavity 15 . The first part 121 and the second part 122 are opposite and identical to each other. The shaft is arranged, a gap 123 is formed between the first part 121 and the second part 122, which is communicated with the gas collection chamber 15, and the nozzle 2 has a first insertion part 22 which can be inserted in the first part 121 and a first insertion part 22 which can be inserted in the first part 121. In the second plug part 23 of the two parts 122 , the suction hole 21 is opened between the first plug part 22 and the second plug part 23 , and the inlet 211 is arranged corresponding to the above-mentioned gap 123 , so that the suction hole 21 on the nozzle 2 is The hole 21 is connected to the gas collection chamber 15 . The inner diameter of the second part 122 is larger than that of the first part 121 , and steps 124 arranged in the circumferential direction are formed at the joint of the first part 121 and the second part 122 . The suction holes 21 are arranged along the axial direction of the nozzle 2 and the outlet 212 is located on the end surface of the above-mentioned step 124 . The suction holes 21 are plural and are arranged at intervals along the circumferential direction of the nozzle 2 . The above structure can prevent the water flow from entering the air collecting chamber 15, so that the gas in the air collecting chamber 15 is sucked into the nozzle 2 under the action of the negative pressure generated by the passing of the water flow.

A guide sleeve 125 is sleeved inside the second part 122 of the first water spray hole 12 in this embodiment. The lower end of the guide sleeve 125 is in contact with the end surface of the step 124 , and the lower end surface of the guide sleeve 125 is radially outward from the outside. An arc surface 1251 is formed with a gradual upward and smooth transition. The upper edge of the arc surface 1251 is tangent to the inner wall surface of the guide sleeve 125 at the connection point. Providing the guide sleeve 125 can reduce the inner diameter of the second part 122 to a certain extent, increase the water flow speed, and make the lower end of the guide sleeve 125 smoothly transition to facilitate the introduction of air flow, thereby better mixing with the water flow.

The nozzle 2 of this embodiment is detachably inserted in the first water spray hole 12 to facilitate production and assembly. In order to facilitate connection, the inner wall of the second part 122 of the first water spray hole 12 has a concave ring 1221 arranged in the circumferential direction. Circle 24. The outer peripheral wall of the upper part of the nozzle 2 is provided with a first groove 25 arranged in the circumferential direction. The first groove 25 is provided with a first sealing ring 26 that can abut against the inner wall of the second part 122 of the first water spray hole 12 . The outer peripheral wall of the lower part of the nozzle 2 is provided with a second groove 27 arranged in the circumferential direction. The second groove 27 is provided with a second sealing ring 28 which can abut against the inner wall of the first part 121 of the first water spray hole 12, This structure can prevent water flow from entering the air collecting cavity 15 .

In this embodiment, the washing machine using the above-mentioned spray arm includes a box body 3 , a spray arm body 1 and a drive mechanism 4 for driving the spray arm body 1 to rotate. The box body 3 has a washing cavity and is installed on the cabinet table 100 Above, the spray arm body 1 is rotatably arranged in the box body 3, the inside of the spray arm body 1 is hollow to form a water collecting cavity 10, and a side wall of the spray arm body 1 is opened to communicate with the water collecting cavity 10. The water inlet 14, 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 collection chamber 10, the lower part of the impeller 42 is located outside the spray arm body 1 through the water inlet 16, and the motor 41 is arranged in the box Outside the body 1 and the motor shaft 411 passes through the casing 1 and is connected to the impeller 42 . The interior of the motor shaft 411 is hollow, the first end of the motor shaft 411 is the air intake end outside the box 1 , and the second end of the motor shaft 411 is the air outlet end communicated with the air collecting chamber 15 . The cleaning machine also includes an air filling structure 5 that can provide an air source for the air collecting cavity 15. The air filling structure 5 includes an air pump 51 and an air guide pipe 52. The air pump 51 is arranged outside the box body 1, and the air inlet end of the air guide pipe 52 is connected to the air pump 51. The air outlet end of the air duct 52 is connected with the air inlet end of the motor shaft 411 .

In this embodiment, a gas collecting cavity 15 is set on the side wall of the spray arm body 1, and a nozzle capable of sucking the gas in the gas collecting cavity 15 and mixing with the water flow is set on the first water spray hole 12 in a water spray state 2. When the water flow passes through the nozzle 2, a negative pressure will be generated on the upper part of the nozzle, so that the gas will be sucked into the nozzle 2 from the gas collecting chamber 15 through the suction hole 21, so that air bubbles are entrained in the sprayed water flow. When going to the dishes, the air bubbles in the water flow will break when they contact the dishes and generate a large impact force, so as to wash away the stubborn dirt on the dishes or vegetables and fruits, and achieve a better cleaning effect; The rotation of the spray arm, the water flow speed is not constant, which makes the amount of gas sucked into the nozzle 2 is not constant, so that the water and gas mixture is reflected in a continuous spray effect, which further increases the pollution resistance. In addition, since the gas source in this embodiment is supplied by the gas collection chamber 15, when the spray arm body 1 is completely submerged by water, the gas can also be sucked into the nozzle 2, thereby strengthening the The turbulence of the water flow improves the cleaning effect.

Claims (13)

1. A spray arm, comprising a spray arm body (1), the spray arm body (1) is provided with a first spray hole (12), characterized in that: it also includes a spray hole that can be used in the first spray hole (12) A nozzle (2) for sucking in gas and mixing with water flow in a water spray state, a gas collecting cavity (15) communicating with the gas source is provided on the side wall of the spray arm body (1), and the The nozzle (2) is sleeved in the first water spray hole (12), and a suction hole (21) is formed on the side wall for the gas in the gas collecting chamber (15) to enter the nozzle (2). 2 . The spray arm according to claim 1 , wherein the first water spray hole ( 12 ) comprises a first portion ( 121 ) located on the side wall of the spray arm body ( 1 ) and a first portion ( 121 ) located in the air collecting cavity. 3 . (15) The second part (122) on the outer side wall, the first part (121) and the second part (122) are arranged opposite to each other and a gap (123) communicated with the gas collecting cavity (15) is formed therebetween. ), the nozzle (2) has a first plug portion (22) that can be inserted into the first portion (121) and a second plug portion (23) that can be inserted into the second portion (122), The suction hole (21) is opened between the first plug portion (22) and the second plug portion (23), and the inlet (211) is arranged corresponding to the above-mentioned gap (123). 3. The spray arm according to claim 2, wherein the inner diameter of the second part (122) is larger than the inner diameter of the first part (121), and the first part (121) and the second part (122) ) are formed with steps (124) arranged in the circumferential direction. 4. The spray arm according to claim 3, characterized in that: the suction holes (21) are arranged along the axial direction of the nozzle (2) and the outlet (211) is located on the end surface of the step (124), so The outer peripheral wall of the nozzle (2) is recessed inward in the radial direction to form the inlet (212) of the suction hole (21). 5. The spray arm according to claim 3, wherein a guide sleeve (125) is sleeved in the second part (122) of the first water spray hole (12), and the guide sleeve (125) The lower end of the guide sleeve (125) is in contact with the end surface of the step (124), and the lower end surface of the guide sleeve (125) forms an arc surface (1251) that gradually and smoothly transitions from the outside to the inside in the radial direction. 6 . The spray arm according to claim 5 , wherein the upper edge of the arc surface ( 1251 ) is tangent to the inner wall surface of the guide sleeve ( 125 ) at the connection point. 7 . 7 . The spray arm according to claim 2 , wherein the nozzle ( 2 ) is detachably inserted in the first water spray hole ( 12 ). 8 . 8 . The spray arm according to claim 7 , wherein the inner wall of the second part ( 122 ) of the first water spray hole ( 12 ) is provided with a concave ring ( 1221 ) arranged in the circumferential direction, and the corresponding , a convex ring (24) that can be matched and snapped with the concave ring (1221) is formed on the outer peripheral wall of the nozzle (2). 9. The spray arm according to claim 8, wherein a first groove (25) arranged in the circumferential direction is formed on the outer peripheral wall of the upper part of the nozzle (2), and the first groove (25) ) is provided with a first sealing ring (26) which can abut against the inner wall of the second part (122) of the first water spray hole (12). 10. The spray arm according to claim 8, characterized in that: a second groove (27) arranged in the circumferential direction is opened on the outer peripheral wall of the lower part of the nozzle (2), the second groove (27) ) is provided with a second sealing ring (28) which can abut against the inner wall of the first part (121) of the first water spray hole (12). 11. The spray arm according to any one of claims 2 to 6, wherein the spray arm body (1) is further provided with a second water spray located at the periphery of the air collecting cavity (15). hole (13). 12. A washing machine applied with the spray arm according to any one of claims 1 to 11, comprising a box body (3), the spray arm and a drive mechanism (for driving the spray arm to rotate) 4), the box body (3) has a washing cavity, the spray arm is rotatably arranged in the box body (3), the inside of the spray arm is hollow to form a water collecting cavity (10), the A water inlet (16) communicated with the water collecting chamber (10) is opened on the side wall of the spray arm, and the driving mechanism (4) includes a motor (41) and an impeller (42), and the upper part of the impeller (42) It is rotatably arranged in the water collecting chamber (10), the lower part of the impeller (42) is located outside the spray arm through the water inlet (16), the motor (41) is arranged outside the box (3) and the motor shaft (411) is connected to the impeller (42) through the casing (3), and is characterized in that: the interior of the motor shaft (411) is hollow, and the first end of the motor shaft (411) is located in the casing (3). ), the second end of the motor shaft (411) is an air outlet that communicates with the air collecting chamber (15). 13. The spray arm according to claim 12, characterized in that it further comprises an air-filling structure (5) capable of providing an air source for the air-collecting chamber (15), and the air-filling structure (5) comprises an air pump ( 51) and an air duct (52), the air pump (51) is arranged on the outside of the box (3), the air inlet end of the air duct (52) is connected to the air pump (51), and the air duct (52) The air outlet end of the motor shaft (411) is connected with the air inlet end.

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