Spraying arm and cleaning machine applying same

Abstract

The invention relates to a spraying arm and a cleaning machine applying the spraying arm, the spraying arm comprises a spraying arm body, a first water spraying hole is formed in the spraying arm body, a gas collecting cavity is formed in the side wall of the spraying arm body, and a second water spraying hole is formed in the side wall of the spraying arm body; and an air suction structure capable of sucking air in the air collection cavity in a water spraying state to be mixed with water flow so as to enable the water flow to carry bubbles is arranged at the first water spraying hole. The air collecting cavity is formed in the side wall of the spraying arm body, and the air suction structure capable of sucking air in the air collecting cavity in the water spraying state to be mixed with water flow is arranged on the first water spraying hole, so that the sprayed water flow carries air bubbles, and when the water flow mixed with the air bubbles is sprayed to dishes, the air bubbles are prevented from entering the air collecting cavity. Bubbles in the water flow break when making contact with the bowls and the dishes and generate large impact force, so that stubborn dirt on the bowls, the dishes or vegetables and fruits is scattered, and a better cleaning effect is achieved.

Description

Technical Field

[0001] The invention relates to a spray arm and a cleaning machine using the spray arm. Background Art

[0002] As people's living standards continue to improve, dishwashers, as a kitchen appliance, are increasingly entering households. Currently, dishwashers on the market are generally divided into three types: desktop, cabinet, and tank. Among them, desktop dishwashers are integrated independent structures and are generally placed on the table for use; cabinet dishwashers are also independent structures, but need to be embedded in kitchen cabinets for use; tank dishwashers are combined with sinks and are generally installed in kitchen cabinets for use.

[0003] The various forms of dishwashers mentioned above generally use a water pump to lift water and spray it onto the dishes in the cleaning space to achieve the cleaning effect. For example, Chinese patents with application number CN97236119.7 "Microcomputer light-controlled fully automatic dishwasher" and Chinese patents with application number CN00240098.7 "A dishwasher" both disclose similar structures. In such structures, the impact force of the water flow sprayed onto the dishes is weak and not uniform. When there are many dishes, they cannot be covered by the water flow, resulting in poor cleaning effect. Chinese patents with application number CN200710306898.5 "Dishwasher with a device for improving the decontamination effect, especially a household dishwasher" are provided with a vaporization device for generating a fluid mist that can be introduced into the dishwasher cavity to expand the cleaning area sprayed onto the dishes and improve the uniformity of the cleaning medium. However, such structures still cannot solve the problem of weak impact force of the sprayed water flow. The Chinese patent "A Large Ultrasonic Automatic Dishwasher" with application number 201610795828.X is equipped with an ultrasonic transmitter device, and simultaneously inputs high-pressure air into the cleaning liquid. The ultrasonic transmitter device is used to form bubbles in the cleaning liquid with the input high-pressure air. The ultrasonic transducer is used to provide energy to the cleaning liquid, so that the bubbles in the cleaning liquid burst and generate impact force, thereby increasing the impact force of the water flow. However, in this type of structure, the instantaneous air explosion phenomenon generated between the ultrasonic wave and the high-pressure bubbles needs to be maintained in water. When the water flow is lifted by the water pump and circulated and sprayed out, the high-pressure bubbles are difficult to reach the surface of the dishes and burst, and cannot be applied to the water jet dishwasher structure. In addition, this type of structure is only suitable for large dishwashers and is difficult to be applied to household dishwashers. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a spray arm of a cleaning machine which can form bubbles in a water flow to increase the impact strength on the object to be cleaned and improve the cleaning effect in view of the current status of the prior art.

[0005] Another technical problem to be solved by the present invention is to provide a cleaning machine with the above-mentioned spray arm in view of the current status of the prior art, which can form bubbles in the water flow, thereby increasing the impact strength on the object to be cleaned and thus improving the cleaning effect.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: The technical solution adopted by the present invention to solve the above technical problems is: A spray arm comprises a spray arm body, wherein a first water spray hole is arranged on the spray arm body, an air collecting cavity is arranged on the side wall of the spray arm body, and an air suction structure is arranged at the first water spray hole, which can suck the gas in the air collecting cavity and mix it with the water flow in the water spraying state so as to entrain bubbles in the water flow.

[0007] The present invention provides an air collecting chamber on the side wall of the spray arm body, and provides an air suction structure on the first water spray hole, which can suck the gas in the air collecting chamber and mix it with the water flow in the water spraying state, so that bubbles are entrained in the sprayed water flow. When the water flow with bubbles is sprayed toward dishes, the bubbles in the water flow contact the dishes and burst and generate a large impact force, thereby dispersing the stubborn dirt on the dishes or fruits and vegetables, and achieving a better cleaning effect.

[0008] In the present invention, when water flows through the suction structure, the suction structure generates negative pressure to suck gas from the gas collecting cavity into the first water spray hole to form a water flow with bubbles. The present invention adopts such a suction principle to achieve self-suction, with a simple structure and stable effect.

[0009] Preferably, 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 chamber, the first part and the second part are arranged opposite to each other and a gap connected to the gas collecting chamber is formed between the first part and the second part. With the above structure, an air suction structure is formed by using the oppositely arranged first part and the second part and the gap between the two, which has a simple structure and a stable air suction effect.

[0010] Preferably, the first part, the second part and the gap therebetween together form the air suction structure, which is surrounded by the air collecting cavity. This structure is beneficial to prevent water stains and the like from being sucked in, thereby improving the stability of the air suction effect.

[0011] Preferably, the inner diameter of the second part is larger than the inner diameter of the first part. This structure is conducive to forming a stable aeration jet.

[0012] Preferably, there are multiple first water spray holes and they are surrounded by a gas collecting cavity. Multiple first water spray holes share one gas collecting cavity, which greatly simplifies the gas supply structure, and a larger gas collecting cavity is conducive to supplying a stable and sufficient airflow to the first water spray holes to ensure the bubble content of the sprayed water column.

[0013] Preferably, the spray arm body is hollow inside to form a water storage cavity, the first water spray hole is opened on the upper wall of the spray arm body and is connected to the water storage cavity, and the air collecting cavity is arranged at the top of the water storage cavity and surrounds the first water spray hole. With the above structure, the shell of the spray arm is used to form a "sandwich" structure, that is, the three-layer shell sandwiches the air collecting cavity and the water storage cavity from top to bottom, making the entire spray arm structure more compact and reasonable, easy to produce and assemble, and providing a stable and sufficient air source for the first water spray hole.

[0014] As an improvement, a nozzle capable of preventing water flow from entering the gas collecting chamber is provided at the first water spray hole. This structure is conducive to preventing water stains from being sucked in, thereby improving the stability of the suction effect, that is, since the gas source is supplied by the gas collecting chamber, even when the entire spray arm body is immersed in water, the gas can be sucked into the nozzle, thereby enhancing the turbulence of the water flow and improving the cleaning effect.

[0015] As an improvement, a nozzle is provided at the first water spray hole, which can cooperate with the non-constant flow rate generated by the rotation of the spray arm to make the jet flow discontinuously sprayed. As the spray arm rotates, the water flow rate is not constant, which makes the amount of gas sucked into the nozzle not constant, so that the water-gas mixture is sprayed discontinuously, further increasing the stripping force on dirt and improving the cleaning effect.

[0016] In the present invention, the nozzle is inserted into the first water spray hole and is provided with an air suction hole for the gas in the gas collecting cavity to enter the nozzle. With such a structure, smooth air suction can be achieved even when the nozzle is set.

[0017] Preferably, the nozzle has a first plug-in portion that can be inserted into the first part and a second plug-in portion that can be inserted into the second part, the air suction hole is opened between the first plug-in portion and the second plug-in portion, and the inlet is arranged corresponding to the above gap. Such a structure is adopted so that the air suction hole on the nozzle is connected to the gas collecting chamber.

[0018] Preferably, the inner diameter of the second part is greater than the inner diameter of the first part, and a step arranged along the circumferential direction is formed at the junction of the first part and the second part.

[0019] Preferably, the air suction hole is 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 air suction hole. With such a structure, water flow can be prevented from entering the gas collecting chamber, and the gas in the gas collecting chamber is sucked into the nozzle under the negative pressure generated by the water flow.

[0020] As an improvement, a guide sleeve is placed inside the second part of the first water spray hole, the lower end of the guide sleeve abuts against the end face of the step, and the lower end face of the guide sleeve forms an arc surface that gradually transitions upward smoothly from the outside to the inside in the radial direction. The upper edge of the arc surface is tangent to the inner wall surface of the guide sleeve at the connection. The provision of the guide sleeve can reduce the inner diameter of the second part to a certain extent, increase the water flow speed, and make the lower end of the guide sleeve transition smoothly to facilitate the introduction of airflow, so as to better mix with the water flow.

[0021] In the above solutions, the nozzle is inserted into the first water spray hole in a detachable manner. Such a structure is convenient for production and assembly.

[0022] In order to facilitate connection, the inner wall of the second part of the first water spray hole is provided with a concave ring arranged along the circumferential direction, and correspondingly, a convex ring that can cooperate and engage with the concave ring is formed on the outer peripheral wall of the nozzle.

[0023] Preferably, a first groove arranged along the circumferential direction is formed on the outer peripheral wall of the upper part of the nozzle, 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. A second groove arranged along the circumferential direction is formed on the outer peripheral wall of the lower part of the nozzle, and a second sealing ring capable of abutting against the inner wall of the first part of the first water spray hole is arranged in the second groove. This structure can prevent water flow from entering the gas collecting chamber.

[0024] In the above solutions, the spray arm is further provided with a second spray hole located outside the gas collecting chamber. The second spray hole is not connected to the gas collecting chamber, is an existing common spray hole, and can cooperate with the first spray hole to improve the cleaning effect.

[0025] A cleaning machine using the above-mentioned spray arm comprises a housing, the spray arm and a driving mechanism for driving the spray arm to rotate, the housing having a washing chamber, the spray arm being rotatably disposed in the housing, the spray arm being hollow inside to form a water collecting chamber, a water inlet connected to the water collecting chamber being provided on the side wall of the spray arm, the driving mechanism comprising a motor and an impeller, the upper part of the impeller being rotatably disposed in the water collecting chamber, the lower part of the impeller passing through the water inlet and being located outside the spray arm, the motor being disposed outside the housing and the motor shaft passing through the housing to be connected to the impeller, the motor shaft being hollow inside, the first end of the motor shaft being an air inlet end disposed outside the housing, and the second end of the motor shaft being an air outlet end connected to the air collecting chamber.

[0026] Preferably, the cleaning machine also includes an air supply structure that can provide an air source for the air collecting chamber, and the air supply structure includes an air pump and an air duct. The air pump is arranged on the outside of the box body, the air inlet end of the air duct is connected to the air pump, and the air outlet end of the air duct is connected to the air inlet end of the motor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1Schematic diagram of the installation structure of the cleaning machine in the embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of some structures; Figure 3 for Figure 2 A cross-sectional view of Figure 4 A schematic diagram of the structure of a nozzle in an embodiment of the present invention; Figure 5 It is a schematic diagram of the assembly structure of the nozzle and the spray arm body in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 As shown in Figure 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 chamber 11. The upper wall of the spray arm body 1 is provided with a first spray hole 12 and a second spray hole 13 connected to the water storage chamber 11. The lower wall of the spray arm body 1 is provided with a water inlet 14 connected to the water storage chamber 11. The side wall of the spray arm body 1 is provided with a gas collecting chamber 15 connected to the gas source. The nozzle 2 is sleeved in the first spray hole 12. The side wall of the nozzle 2 is provided with an air suction hole 21 for the gas in the gas collecting chamber 15 to enter the nozzle 2, so that the first spray hole 12 in the water spraying state sucks the gas due to negative pressure and mixes with the water flow, thereby causing bubbles to be entrained in the sprayed water flow. The second spray hole 13 is located at the periphery of the gas collecting chamber 15. The second spray hole 13 is not connected to the gas collecting chamber 15. It is an existing common spray hole, which can cooperate with the first spray hole 12 to improve the cleaning effect.

[0030] like Figure 2 , 3 As shown, there are multiple first water spray holes 12, and the multiple first water spray holes 12 share one gas collecting cavity 15, which not only has a simple structure but also can provide a stable gas supply for the air intake structure, thereby improving the gas filling effect.

[0031] The first water spray hole 12 of this embodiment includes a first portion 121 located on the side wall of the spray arm body 1 and a second portion 122 located on the outer side wall of the gas collecting chamber 15. The first portion 121 and the second portion 122 are arranged oppositely and coaxially. A gap 123 communicating with the gas 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 that can be inserted into the first portion 121 and a second plug-in portion 23 that can be 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 above gap 123, so that the air suction hole 21 on the nozzle 2 is connected to the gas collecting chamber 15. The inner diameter of the second portion 122 is greater than the inner diameter of the first portion 121, and a step 124 arranged along the circumferential direction is formed at the junction of the first portion 121 and the second portion 122. The air suction hole 21 is arranged along the axial direction of the nozzle 2 and the outlet 212 is located on the end surface of the step 124. The outer peripheral wall of the nozzle 2 is recessed radially inward to form the inlet 211 of the air suction hole 21. There are multiple air suction holes 21 and they are arranged at intervals along the circumference of the nozzle 2. The above structure can prevent water flow from entering the gas collecting chamber 15 and make the gas in the gas collecting chamber 15 be sucked into the nozzle 2 under the negative pressure generated by the water flow.

[0032] The second part 122 of the first water spray hole 12 of this embodiment is sleeved with a guide sleeve 125, the lower end of the guide sleeve 125 is against the end face of the step 124, and the lower end face of the guide sleeve 125 is formed with a camber 1251 that gradually transitions upward smoothly from the outside to the inside in the radial direction. The upper edge of the camber 1251 is tangent to the inner wall of the guide sleeve 125 at the connection. 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 airflow, so as to better mix with the water flow.

[0033] The nozzle 2 of this embodiment is detachably inserted into 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 is provided with a concave ring 1221 arranged along the circumferential direction, and correspondingly, a convex ring 24 that can be matched and engaged with the concave ring 1221 is formed on the outer peripheral wall of the nozzle 2. A first groove 25 arranged along the circumferential direction is formed on the outer peripheral wall of the upper part of the nozzle 2, and a first sealing ring 26 that can abut against the inner wall of the second part 122 of the first water spray hole 12 is arranged in the first groove 25. A second groove 27 arranged along the circumferential direction is formed on the outer peripheral wall of the lower part of the nozzle 2, and a second sealing ring 28 that can abut against the inner wall of the first part 121 of the first water spray hole 12 is arranged in the second groove 27. This structure can prevent water from entering the air collecting chamber 15.

[0034] In this embodiment, the cleaning machine using the above-mentioned spray arm comprises a housing 3, a spray arm body 1 and a driving mechanism 4 for driving the spray arm body 1 to rotate. The housing 3 has a washing chamber and is installed on a cabinet countertop 100. The spray arm body 1 is rotatably arranged in the housing 3. The interior of the spray arm body 1 is hollow to form a water collecting chamber 10. A water inlet 14 connected to the water collecting chamber 10 is opened on the side wall of the spray arm body 1. The driving mechanism 4 comprises a motor 41 and an impeller 42. The upper part of the impeller 42 is rotatably arranged in the water collecting chamber 10. The lower part of the impeller 42 passes through the water inlet 16 and is located outside the spray arm body 1. The motor 41 is arranged outside the housing 1 and the motor shaft 411 passes through the housing 1 and is connected to the impeller 42. The motor shaft 411 is hollow inside, the first end of the motor shaft 411 is an air inlet end arranged outside the housing 1, and the second end of the motor shaft 411 is an air outlet end connected to 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 chamber 15. The air filling structure 5 includes an air pump 51 and an air guide pipe 52. The air pump 51 is arranged on the outside of the box body 1. The air inlet end of the air guide pipe 52 is connected to the air pump 51, and the air outlet end of the air guide pipe 52 is connected to the air inlet end of the motor shaft 411.

[0035] In this embodiment, an air collecting chamber 15 is arranged on the side wall of the spray arm body 1, and a nozzle 2 is arranged on the first water spray hole 12, which can absorb the gas in the air collecting chamber 15 and mix it with the water flow in the water spraying state. When the water flows through the nozzle 2, negative pressure is generated on the upper part of the nozzle, so that the gas is sucked from the air collecting chamber 15 into the nozzle 2 through the suction hole 21, so that the sprayed water flow is entrained with bubbles. When the water flow with bubbles is sprayed toward the dishes, the bubbles in the water flow contact the dishes and burst and generate a large impact force, so that the stubborn particles on the dishes or fruits and vegetables are removed. Solid dirt is dispersed to achieve a better cleaning effect; at the same time, since the water flow speed is not constant as the spray arm rotates, the amount of gas sucked into the nozzle 2 is not constant, so that the water-gas mixture is manifested as a discontinuous spraying effect, further increasing the stripping force on dirt and improving the cleaning effect; in addition, since the gas source of this embodiment is supplied by the gas collecting chamber 15, when the spray arm body 1 is immersed in water as a whole, the gas can also be sucked into the nozzle 2, thereby enhancing the turbulence of the water flow and improving the cleaning effect.

[0036] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A spray arm, comprising a spray arm body (1), wherein the spray arm body (1) is provided with a first water spray hole (12), characterized in that: An air collecting chamber (15) is provided on the side wall of the spray arm body (1), and an air suction structure is provided at the first water spray hole (12) for sucking gas from the air collecting chamber (15) and mixing it with water flow in a water spraying state, thereby entraining bubbles in the water flow.

2. The spray arm according to claim 1, characterized in that: When water flows through the air suction structure, the air suction structure generates negative pressure, thereby sucking gas from the gas collecting chamber (15) into the first water spray hole (12) to form a water flow with air bubbles.

3. The spray arm according to claim 2, characterized in that: The first water spray hole (12) comprises a first portion (121) located on the side wall of the spray arm body (1) and a second portion (122) located on the outer side wall of the air collecting chamber (15); the first portion (121) and the second portion (122) are arranged opposite to each other and a gap (123) connected to the air collecting chamber (15) is formed between the first portion (121) and the second portion (122).

4. The spray arm according to claim 3, characterized in that: The first part (121), the second part (122) and the gap (123) therebetween together form the air intake structure, which is enclosed in the air collecting cavity.

5. The spray arm according to claim 3, characterized in that: The inner diameter of the second portion (122) is greater than the inner diameter of the first portion (121).

6. The spray arm according to claim 2, characterized in that: There are a plurality of first water spray holes (12) which are surrounded by the air collecting cavity.

7. The spray arm according to claim 6, characterized in that: The spray arm body is hollow inside to form a water storage cavity. The first water spray hole is opened on the upper wall of the spray arm body and is connected with the water storage cavity. The air collecting cavity is arranged on the top of the water storage cavity and surrounds the first water spray hole.

8. The spray arm according to any one of claims 1 to 7, characterized in that: The first water spray hole (12) is provided with a nozzle (2) capable of preventing water from entering the air collecting cavity.

9. The spray arm according to any one of claims 1 to 7, characterized in that: The first water spray hole (12) is provided with a nozzle (2) which can cooperate with the non-constant flow rate generated by the rotation of the spray arm to spray the jet discontinuously.

10. A cleaning machine, comprising a housing, characterized in that: Also includes the spray arm described in any one of claims 1 to 9.

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