CN217645167U

CN217645167U - Spray arm for cleaning machine and cleaning machine with spray arm

Info

Publication number: CN217645167U
Application number: CN202120988797.6U
Authority: CN
Inventors: 韩健健; 郑峰; 魏本柱; 张昌海; 施郑赞; 姜勇; 姚永磊; 赵书瀚
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-10-25
Anticipated expiration: 2031-05-10

Abstract

The utility model relates to a spray arm for a cleaning machine and a cleaning machine applying the spray arm, the spray arm comprises a body, a flow channel extending along the length direction of the body is arranged in the body, a water inlet communicated with the flow channel is arranged on the bottom wall of the body, and water spray holes are arranged on the top wall, a plurality of water spray holes arranged corresponding to the corresponding flow channel are respectively arranged on two sides of the water inlet, and the water spray holes on two sides of the water inlet are asymmetrically arranged; the top of the spray arm is provided with an air-entrapping structure which can enable bubbles to be entrained in water flow in the water flow spraying process. The utility model arranges a plurality of asymmetrical water spray holes at two sides of the water inlet, each water spray hole corresponds to different cleaning areas, thereby eliminating cleaning dead angles and being beneficial to improving the cleaning effect; the air-entrapping structure enables bubbles to be entrained in the jet flow in the water column ejection process, and the bubbles can be broken on the surfaces of dishes or fruits and vegetables to improve the dirt stripping force and improve the cleaning effect.

Description

Spray arm for cleaning machine and cleaning machine with same

Technical Field

The utility model relates to a dish washer technical field specifically indicates a spray arm and uses the cleaning machine that has this spray arm.

Background

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

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

In addition, for different types of dish washing machines, due to different sizes, the positions for placing dishes in the dish washing machines can be different, and the universal spray arms in the market often influence the cleaning effect due to the fact that the water jet capacity is not matched with the positions for placing the dishes.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem to provide a spray arm that smugglies the bubble and then improves the cleaning performance secretly in enabling jet stream to the current situation of prior art.

The utility model discloses the second technical problem that will solve is to prior art's current situation, thereby provides one kind and can eliminate and wash the dead angle and improve the spray arm of cleaning performance.

The utility model discloses the third technical problem that will solve is to prior art's current situation, provides an use the cleaning machine that has above-mentioned spray arm.

The utility model provides a technical scheme that at least one above-mentioned technical problem adopted does:

a spray arm for a cleaning machine comprises a body, wherein a flow channel extending along the length direction of the body is arranged in the body, a water inlet communicated with the flow channel is formed in the bottom wall of the body, water spray holes are formed in the top wall of the body, a plurality of water spray holes arranged corresponding to the corresponding flow channel are respectively formed in two sides of the water inlet, and the water spray holes in the two sides of the water inlet are asymmetrically arranged; the top of the spray arm is provided with an air-entrapping structure which can enable bubbles to be entrained in water flow in the water flow spraying process.

In the above scheme, the gas filling structure is provided with a nozzle, and the nozzle is positioned at the top of the water spraying hole and forms a gas suction area which can form negative pressure under the water spraying state so as to suck gas into the water flow. According to the venturi effect, during the process that water flow is jetted out through the hole for water spraying and the nozzle, negative pressure is formed at the gap between the water spraying and the nozzle, namely, an air suction area, so that air is sucked into a water column, bubbles are carried in jet flow, and the bubbles can improve the peeling force of dirt and improve the cleaning effect by crushing the surfaces of dishes or fruits and vegetables.

Preferably, the top of the body is provided with a top plate, a gas collecting cavity for storing gas is enclosed between the bottom wall of the top plate and the top wall of the body, the water spray holes are distributed in an area corresponding to the gas collecting cavity, the nozzles are arranged on the top plate and arranged corresponding to the water spray holes, a gap is formed between the upper ends of the water spray holes and the lower ends of the nozzles, the gap forms the gas suction area, and the top plate, the gas collecting cavity and the nozzles form the gas filling structure together. Adopt above-mentioned structure, can provide stable area of breathing in under the cleaning condition, avoid breathing in the area and inhale water and influence the air entrainment effect.

Preferably, the top and/or the side of the spray arm is/are provided with an air inlet communicated with the air collection cavity. Gas is added into the jet flow in a self-suction mode, a gas pump and the like are not needed, and the production cost is greatly reduced.

Preferably, the top wall of the body is gradually recessed downwards from two ends to the middle to form a draining area, and a water outlet for discharging water is formed in the edge of the draining area. In the process of cleaning dishes by upwards spraying water flow by the spray arm, the water flow inevitably hits the spray arm when falling back, and water stains always exist on the surface of the spray arm, so that a small amount of water is easily sucked into the gas collecting cavity, the gas storage amount in the gas collecting cavity is influenced for a long time, the gas adding amount to the spraying water column is further influenced, and bacteria are easily bred in the gas collecting cavity; by adopting the structure, accumulated water in the gas collection cavity can be discharged in time, so that the stability of gas filling is improved.

Preferably, the inner diameter of the lower port of the nozzle is larger than that of the upper port of the water spraying hole, the nozzle and the water spraying hole are arranged concentrically, and the concentricity between the nozzle and the water spraying hole is 0-1 mm, and further preferably is lower than 0.5mm, and the structure is favorable for improving the air suction effect.

The utility model discloses in, the hole for water spraying quantity of water inlet first side is greater than the hole for water spraying quantity of water inlet second side. The water spraying holes are regularly or irregularly distributed on the body in a wavy manner, and the spraying directions of at least part of the water spraying holes are different. The spraying direction of at least one water spraying hole positioned at the end part of the body inclines outwards, and the included angle between the central axis of the water spraying hole and the horizontal plane is 5-70 degrees. Because the volume difference of washing chamber, bowl frame size difference, bowl dish put the influence of factors such as order difference, same money spray arm if be arranged in different dish washers probably to have the washing dead angle and influence the cleaning performance, adopt the utility model discloses an above-mentioned hole for water spraying distribution structure is favorable to eliminating the washing dead angle, improves the cleaning performance.

Preferably, a first nozzle which is arranged close to the end part and used for sweeping slag is arranged on the bottom wall of the body, and the first nozzle is arranged corresponding to the second side of the water inlet and communicated with the flow channel. Preferably, the first nozzle is inclined downwards from the end part of the body to the middle of the body, and an included angle of 5-45 degrees is formed between the spraying direction of the first nozzle and the central line of the flow channel. The first nozzle can wash residues on the edge of the draining plate inwards in the rotating process so as to improve the slag collecting effect; the first nozzle is arranged on one side of the flow channel with less water spraying holes, so that higher water spraying pressure is achieved, and the slag collecting effect is improved.

Preferably, a second nozzle used for balancing the rotating speed of the spray arm is formed in the bottom wall of the body, and the second nozzle is arranged corresponding to the first side of the water inlet and communicated with the flow channel. The rotation of the spray arm is driven by the viscous force of water, the rotating speed of the spray arm is not uniform enough, and the cleaning effect can be influenced; the second nozzle is arranged on one side of the flow channel with more spray holes, so that water pressure and water flow loss are less, and the rotation stability of the spray arm can be better balanced.

Preferably, the second nozzle is arranged from the bottom wall of the body to the side part of the body in a downward inclined manner, and an included angle of 70-120 degrees is formed between the spraying direction of the second nozzle and the central line of the flow channel. The direction of the water flow sprayed by the second nozzle is opposite to the rotation direction of the spray arm, so that power can be provided for the rotation of the spray arm, and the energy loss caused by partial water flow released by the second nozzle is reduced.

As an improvement, the throat of the flow passage extends to the water inlet and extends into the water inlet. After the assembly is completed, the water inlet of the spray arm is generally matched with the upper end of the flow guide seat below the spray arm, for example, the upper end of the flow guide seat is in butt joint or insertion connection with the water inlet of the spray arm, which belongs to the prior art and is not described herein again; in the cleaning process, the negative pressure area of the spray arm is located on the inner side of the water inlet, other parts of the flow channel of the spray arm are positive pressure, and a small amount of water can be pressed into the joint of the upper end of the flow guide seat and the water inlet of the spray arm by the positive pressure, so that liquid leakage or gas suction at the water inlet is avoided, and the water flow jet lift and the cleaning effect are improved.

The cleaning machine with the spray arm comprises a box body, wherein the spray arm can be rotatably arranged in the box body.

Preferably, the middle part of the box body is provided with a partition plate assembly capable of dividing the inner cavity of the box body into an upper space and a lower space, at least part of the partition plate assembly is detachably or movably arranged in the box body so as to communicate or separate the upper space and the lower space, and the spray arm is arranged in the lower space. When more dishes are washed, the upper space and the lower space can be communicated for use, and when less dishes are washed, the upper space and the lower space can be separated, and only the lower space is used for washing, so that the effects of water saving and dual purposes of one chamber are achieved.

Compared with the prior art, the utility model has the advantages of: the utility model arranges a plurality of asymmetric water spray holes on both sides of the water inlet, each water spray hole corresponds to different cleaning areas, thereby eliminating the cleaning dead angle and being beneficial to improving the cleaning effect; the air-entrapping structure enables bubbles to be entrained in jet flow in the water column ejecting process, and the bubbles can be broken on the surfaces of dishes or fruits and vegetables to improve the dirt stripping force and improve the cleaning effect.

Drawings

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

FIG. 2 is a schematic view of the structure of FIG. 1 from another angle;

FIG. 3 is a cross-sectional view of FIG. 1;

fig. 4 is a schematic view of the position arrangement structure of the water spray holes and the nozzles in embodiment 1 of the present invention;

FIG. 5 is a bottom view of FIG. 1;

fig. 6 is a schematic structural view of embodiment 2 of the present invention;

fig. 7 is a bottom view of fig. 6.

Detailed Description

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

Example 1:

as shown in fig. 1 to 5, the spray arm of the present embodiment is used in a dishwasher, and includes a body 1, a flow channel 11 extending along the length direction of the body 1 is provided in the body 1, a water inlet 12 communicated with the flow channel 11 is provided on the bottom wall of the body 1, and a water spray hole 13 is provided on the top wall. The two sides of the water inlet 12 are respectively provided with a plurality of water spraying holes 13 which are arranged corresponding to the corresponding flow channels 11, the water spraying holes 13 on the two sides of the water inlet 12 are asymmetrically arranged, and each water spraying hole 13 corresponds to different cleaning areas, so that the cleaning dead angle is eliminated, and the cleaning effect is improved. The top of spray arm is provided with can make the air entrainment structure 2 of smuggleing the bubble secretly in rivers blowout in-process, makes the efflux smuggleing secretly in the water column blowout in-process through air entrainment structure 2 and has the bubble secretly, and this bubble can improve filth peel strength at bowl dish or fruit vegetables surface breakage, improves the cleaning performance.

The gas adding structure 2 is provided with a nozzle 21, the nozzle 21 is positioned at the top of the water spraying hole 13, and a gas suction area 100 which can form negative pressure under the water spraying state and suck gas into the water flow is formed between the nozzle 21 and the water spraying hole 13. According to the venturi effect, during the process that water flow is jetted out through the hole for water spraying and the nozzle, negative pressure is formed at the gap between the water spraying and the nozzle, namely, an air suction area, so that air is sucked into a water column, bubbles are carried in jet flow, and the bubbles can improve the peeling force of dirt and improve the cleaning effect by crushing the surfaces of dishes or fruits and vegetables.

Specifically, a top plate 22 is arranged at the top of the body 1, a gas collecting cavity 20 for storing gas is enclosed between the bottom wall of the top plate 22 and the top wall of the body 1, the water spray holes 13 are distributed in an area corresponding to the gas collecting cavity 20, the nozzles 21 are arranged on the top plate 22 and arranged corresponding to the water spray holes 13, a gap is formed between the upper ends of the water spray holes 13 and the lower ends of the nozzles 21, the gap forms a gas suction area 100, and the top plate 22, the gas collecting cavity 20 and the nozzles 21 form the gas filling structure 2. By adopting the structure, the stable air suction area 100 can be provided in a cleaning state, and the air entrainment effect is prevented from being influenced by water suction of the air suction area 100.

The side of the spray arm is provided with an air inlet 23 communicated with the air collection cavity 20. Gas is added into the jet flow in a self-suction mode, a gas pump and the like are not needed, and the production cost is greatly reduced. The top wall of the body 1 is gradually depressed from both ends to the middle to form a draining area 24, and a draining port 25 for draining water is opened at the edge of the draining area 24. In the process of cleaning dishes by upwards spraying water flow to the spraying arm, the water flow inevitably hits the spraying arm when falling back, and water stains always exist on the surface of the spraying arm, so that a small amount of water is easily sucked into the gas collecting cavity, and the gas storage amount in the gas collecting cavity is influenced for a long time, the gas adding amount to the spraying water column is further influenced, and bacteria are easily bred in the gas collecting cavity; by adopting the structure, accumulated water in the gas collection cavity can be discharged in time, so that the stability of gas filling is improved.

The inner diameter of the lower port of the nozzle 21 is larger than that of the upper port of the water spraying hole 13, the nozzle 21 and the water spraying hole 13 are arranged concentrically, and the concentricity between the nozzle 21 and the water spraying hole 13 is 0-1 mm, preferably less than 0.5 mm.

In this embodiment, the number of the water discharge holes 13 on the first side 121 of the water inlet 12 is greater than the number of the water discharge holes 13 on the second side 122 of the water inlet 12. The water jet holes 13 are distributed on the body 1 in a regular or irregular wave shape, and the jetting directions of at least some of the water jet holes 13 are different. The spraying direction of a water spraying hole 13 positioned at the end part of the body 1 is inclined outwards, and the included angle between the central axis of the water spraying hole 13 and the horizontal plane is 5-70 degrees. Due to the influences of factors such as different volumes of washing cavities, different sizes of dish racks, different placing orders of dishes and the like, the washing effect is influenced by the fact that the washing dead angles possibly exist when the same type of spraying arms are used in different dish washing machines, and by adopting the distribution structure of the water spraying holes 13, the washing dead angles can be eliminated, and the washing effect is improved.

The bottom wall of the body 1 is provided with a first nozzle 14 which is arranged close to the end part and used for sweeping slag, and the first nozzle 14 is arranged corresponding to the second side 122 of the water inlet 12 and communicated with the flow passage 11. The first nozzle 14 is inclined downwards from the end of the body 1 to the middle of the body 1, and an included angle b of 5 to 45 degrees, preferably 25 to 35 degrees, is formed between the spraying direction of the first nozzle 14 and the central line of the flow channel 11. The first nozzle 14 can wash residues on the edge of the draining board inwards in the rotating process so as to improve the slag collecting effect; the first nozzle 14 is arranged at one side of the runner 11 with less water spraying holes 13, so that the water spraying pressure is higher, and the slag collecting effect is improved.

In the present embodiment, the throat 111 of the flow channel 11 extends towards the water inlet 12 and into the water inlet 12. After the assembly is completed, the water inlet 12 of the spray arm is generally matched with the upper end of the diversion seat below the water inlet 12, for example, the upper end of the diversion seat is butted or inserted with the water inlet 12 of the spray arm, which belongs to the prior art and is not described herein again; in the cleaning process, the negative pressure area of the spray arm is positioned at the inner side of the water inlet 12, other parts of the spray arm flow channel 11 are positive pressure, and a small amount of water can be pressed into the joint of the upper end of the flow guide seat and the water inlet 12 of the spray arm by the positive pressure, so that liquid leakage or gas suction at the water inlet 12 is avoided, and the water flow jet lift and the cleaning effect are improved. The distance d from the end of the throat 111 of the flow channel 11 to the water inlet 12 is 1 to 20mm, preferably 3 to 10mm, from the bottom view.

The cleaning machine with the spray arm comprises a box body, and the spray arm can be rotatably arranged in the box body. The middle part of the box body is provided with a clapboard component which can divide the inner cavity of the box body into an upper space and a lower space, at least part of the clapboard component is detachably or movably arranged in the box body so as to communicate or separate the upper space and the lower space, and the spray arm is arranged in the lower space. When more dishes are washed, the upper space and the lower space can be communicated for use, and when less dishes are washed, the upper space and the lower space can be separated, and only the lower space is used for washing, so that the effects of water saving and dual purposes of one chamber are achieved.

Example 2:

this example differs from example 1 in that: the spray arm of this embodiment can be adapted to a cleaning chamber having a larger volume.

As shown in fig. 6 and 7, the spray arm of the present embodiment has more water spraying holes 13, and the distribution position and the spraying direction of each water spraying hole 13 can be adjusted according to the specific placement position of the dishes.

In this embodiment, a second nozzle 15 for balancing the rotation speed of the spray arm is opened on the bottom wall of the main body 1, and the second nozzle 15 is disposed corresponding to the first side 121 of the water inlet 12 and is communicated with the flow channel 11. The rotation of the spray arm is driven by the viscous force of water, the rotating speed of the spray arm is not uniform enough, and the cleaning effect can be influenced; the second nozzle 15 is arranged on one side of the runner 11 with more water spray holes 13, so that the water pressure and water flow loss are less, and the rotation stability of the spray arm can be better balanced.

The second nozzle 15 is arranged from the bottom wall of the body 1 to the side part of the body in a downward inclined way, and an included angle c of 70-120 degrees is formed between the spraying direction of the second nozzle 15 and the central line of the flow channel 11. The direction of the water flow sprayed by the second spray nozzles 15 is opposite to the rotation direction of the spray arm, so that power can be provided for the rotation of the spray arm, and the energy loss caused by partial water flow released by the second spray nozzles 15 is reduced.

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be construed as limiting, and for example, "upper" and "lower" are not necessarily limited to orientations opposite or consistent with the direction of gravity.

Claims

1. The utility model provides a spray arm for cleaning machine, includes body (1), has runner (11) that extend along body length direction in this body (1), it has water inlet (12) that are linked together with runner (11) to open on body (1) diapire, has hole for water spraying (13) on the roof, its characterized in that: a plurality of water spray holes (13) which are arranged corresponding to the corresponding flow channels (11) are respectively arranged at the two sides of the water inlet (12), and the water spray holes (13) at the two sides of the water inlet (12) are arranged asymmetrically.

2. The spray arm for a cleaning machine of claim 1, wherein: the top of the spray arm is provided with an air-entrapping structure (2) which can enable bubbles to be entrained in water flow in the water flow spraying process, the air-entrapping structure (2) is provided with a nozzle (21), the nozzle (21) is positioned at the top of the water spraying hole (13) and an air suction area (100) which can form negative pressure in the water flow spraying state so as to suck gas into the water flow is formed between the nozzle (21) and the water spraying hole (13).

3. The spray arm for a cleaning machine of claim 2 wherein: the gas filling device is characterized in that a top plate (22) is arranged at the top of the body (1), a gas collecting cavity (20) for storing gas is formed by enclosing the bottom wall of the top plate (22) and the top wall of the body (1) together, water spraying holes (13) are distributed in an area corresponding to the gas collecting cavity (20), the nozzles (21) are arranged on the top plate (22) and correspond to the water spraying holes (13) in an arrangement mode, a gap is formed between the upper end of each water spraying hole (13) and the lower end of each nozzle (21), the gap forms a gas suction area (100), and the top plate (22), the gas collecting cavity (20) and the nozzles (21) form the gas filling structure (2) together.

4. The spray arm for a cleaning machine of claim 3, wherein: the top and/or the side of the spray arm is provided with an air inlet (23) communicated with the air collecting cavity (20).

5. The spray arm for a cleaning machine of claim 3, wherein: the top wall of the body (1) is gradually sunken downwards from two ends to the middle to form a draining area (24), and a water outlet (25) for discharging water is formed in the edge of the draining area (24).

6. The spray arm for a cleaning machine of claim 2 wherein: the inner diameter of the lower port of the nozzle (21) is larger than that of the upper port of the water spray hole (13), the nozzle (21) and the water spray hole (13) are concentrically arranged, and the concentricity between the nozzle and the water spray hole is 0-1 mm.

7. The spray arm for a cleaning machine of any one of claims 1 to 5, wherein: the number of the water spraying holes (13) on the first side of the water inlet (12) is larger than that of the water spraying holes (13) on the second side of the water inlet (12).

8. The spray arm for a cleaning machine of claim 7, wherein: the bottom wall of the body (1) is provided with a first nozzle (14) which is arranged close to the end part and used for sweeping slag, and the first nozzle (14) is arranged corresponding to the second side of the water inlet (12) and communicated with the flow channel (11).

9. The spray arm for a cleaning machine of claim 8 wherein: the first nozzle (14) is gradually inclined downwards from the end part of the body (1) to the middle direction of the body (1), and an included angle of 5-45 degrees is formed between the spraying direction of the first nozzle (14) and the central line of the flow channel (11).

10. The spray arm for a cleaning machine of claim 7, wherein: and a second nozzle (15) used for balancing the rotating speed of the spray arm is arranged on the bottom wall of the body (1), and the second nozzle (15) is arranged corresponding to the first side of the water inlet (12) and communicated with the flow channel (11).

11. The spray arm for a cleaning machine of claim 10 wherein: the second nozzle (15) is arranged from the bottom wall of the body (1) to the side part of the body (1) in a downward inclined mode, and an included angle of 70-120 degrees is formed between the spraying direction of the second nozzle (15) and the central line of the flow channel (11).

12. The spray arm for a cleaning machine according to any one of claims 1 to 5, characterized in that: the water spray holes (13) are regularly or irregularly distributed on the body (1) in a wave shape, and the spraying directions of at least part of the water spray holes (13) are different.

13. The spray arm for a cleaning machine of claim 12 wherein: the spraying direction of at least one water spraying hole (13) positioned at the end part of the body (1) is inclined outwards, and the included angle between the central axis of the water spraying hole (13) and the horizontal plane is 5-70 degrees.

14. The spray arm for a cleaning machine according to any one of claims 1 to 5, characterized in that: the throat opening (111) of the flow channel (11) extends towards the water inlet (12) and extends into the water inlet (12).

15. The spray arm for a cleaning machine of claim 14, the method is characterized in that: and the distance (d) from the end part of the throat (111) of the flow channel (11) to the water inlet (12) is 1-20 mm from the bottom view.

16. The utility model provides a cleaning machine, includes the box, its characterized in that: the spray arm of any of claims 1-15, further comprising a spray arm rotatably disposed in the housing.

17. The cleaning machine of claim 16, wherein: the middle part of the box body is provided with a clapboard component which can divide the inner cavity of the box body into an upper space and a lower space, at least part of the clapboard component is detachably or movably arranged in the box body so as to communicate or separate the upper space and the lower space, and the spray arm is arranged in the lower space.