CN218606512U - A nozzle, spray arm and cleaning machine for cleaning machine - Google Patents

Abstract

The utility model relates to a nozzle, spray arm and cleaning machine for cleaning machine, the nozzle just has the hollow chamber that catchments for discoid, the nozzle bottom is opened to arrange that it is uncovered to form the bottom, the top is opened there is the slope to arrange and with the water jet that the chamber is linked together that catchments, the uncovered installation in bottom of nozzle can drive nozzle pivoted impeller under the water impact, thereby the impeller inlays to be put and will catchment the chamber and seal in the uncovered bottom, the central part of impeller is opened and is supplied the water inlet that the water in the flow path got into the chamber that catchments. Under the impact of water flow, the impeller rotates to drive the nozzle to rotate, the rotating power of the nozzle comes from the impeller arranged along the periphery of the nozzle, the contact surface of the impeller and the water flow is large, and the impact energy of the water flow can be better transmitted to drive the nozzle to rotate, so that the rotating speed and the stability of the nozzle can be favorably increased, and the cleaning degree in a spraying range can be improved; the impeller relatively seals the water collecting cavity, so that water entering the nozzle flows more stably, energy loss can be reduced, and the injection lift is improved.

Description

A nozzle, spray arm and cleaning machine for cleaning machine

Technical Field

The utility model relates to a dish washer technical field specifically indicates a nozzle, spray arm and cleaning machine for cleaning machine.

Background

A dishwasher is generally provided with a spray arm for spraying water to wash dishes or vegetables. For example, chinese patent publication No. CN204813755U, entitled "spray arm seat of dishwasher", spray arm device of dishwasher and dishwasher "(application No. CN 201520531714.5), and chinese patent publication No. CN209932651U, entitled" spray arm of cleaning machine "(application No. CN201920258610. X) disclose corresponding spray arm structures.

For the spray arm with the structure, the water inlet is positioned on one side wall of the spray arm, and double water outlets are arranged at two sides of the water inlet, the spray arm is driven to rotate by viscous force dispersed in the flow channel, and the other side wall of the spray arm is provided with a water spraying hole for spraying water columns. In the existing dish washing machine, after the structure of the dish rack is fixed, the positions of dishes on the dish rack are unchanged, and the water columns sprayed by the spraying arms are approximately linear (strip-shaped), so that the range of the sprayed water columns is limited, the surfaces of all tableware cannot be considered, dead angles exist in washing, and the washing effect is influenced. Meanwhile, for the dish washer with a rectangular washing cavity, a washing dead angle is easy to generate.

A structure is disclosed in the utility model patent CN204445748U (application number: CN 201520047405.0), the sprayer comprises a water storage cavity, a spraying surface and a mounting surface, the spraying surface is provided with a plurality of spraying holes communicated with the water storage cavity, the mounting surface is provided with a water inlet, the spraying surface is provided with a spray head, the spray head is provided with at least two spray head spraying holes, the spray head is internally provided with a water channel communicated with the water storage cavity, and the spray head spraying holes are communicated with the water channel. When the sprayer rotates to spray, the spray heads on the sprayer also spray simultaneously, and the spray heads are provided with at least two spray head spray holes, so that the effective spray area is increased, and the spray dead angle is reduced.

The sprayer with the structure is beneficial to reducing the cleaning dead angle, but when the water column is sprayed, the rotating power of the spray head is mainly driven by the force of the water column sprayed through the deflected spray holes, so that the rotating speed of the spray head depends on the pressure of the sprayed water column, if the water pressure in the sprayer is low, the rotating speed of the spray head is very low, the sweeping frequency of the water column sprayed through the deflected spray holes is directly influenced, and the cleaning degree is further influenced. Meanwhile, water entering the spray head is easy to collide with each other and generate disorder, so that water flow energy loss is caused, the lift of a sprayed water column is influenced, and the cleaning effect is further influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem that will solve is to provide a nozzle for cleaning machine that can reduce the rotational speed and continuously maintain higher rotational speed and then improve the cleanliness factor to hydraulic requirement thereby to prior art's current situation.

The utility model discloses the second technical problem that will solve is to prior art's current situation, thereby provides one kind and can carry out stationary flow control and reposition of redundant personnel to the water that gets into the nozzle and reduce the spray arm that is used for the cleaning machine that energy loss keeps high injection lift.

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:

the utility model provides a nozzle for cleaning machine for be connected with the delivery port that sprays water part, the nozzle is discoid and has the hollow chamber that catchments, the nozzle bottom is opened to arrange and is formed bottom uncovered, the top open have for the top upper surface slope arrange and with catchment the water jet that the chamber is linked together, the uncovered department in bottom of nozzle installs and to drive nozzle pivoted impeller under water impact, thereby this impeller inlays to be put and will catchment the chamber and seal in the bottom is open, the central point of impeller is opened and is supplied the water inlet that the water pipe intermediate water got into catchment the chamber.

Preferably, the impeller comprises a top cover and a sleeve body extending downwards from the outer edge of the top cover, the top cover and the sleeve body jointly enclose a semi-enclosed cavity with a downward opening, the water inlet is arranged at the central part of the top cover, and blades capable of rotating under water flow impact are arranged in the semi-enclosed cavity. Above-mentioned structure makes the impeller can produce great rotational speed under the rivers impact, can avoid blade circumference dispersion rivers again and influence the inflow of water inlet to have great discharge in keeping the nozzle.

Preferably, the top cover is gradually sunken downwards from the edge to the water inlet in the center of the top cover, the water spraying ports of the nozzles are arranged corresponding to the edge of the top cover, and the upper surface of the top cover forms a flow guide arc surface for guiding the water flow upwards delivered by the water inlet to the water spraying ports along the radial direction. By adopting the structure, water entering the water collecting cavity can be quickly divided and guided, so that the phenomenon that the water flow is disordered due to impact in the water collecting cavity and energy loss is caused is avoided, and the sprayed water column of the nozzle keeps higher lift and impact force.

Preferably, the vanes are distributed on the lower surface of the top cover at intervals along the circumferential direction, and the outer ends of the vanes are connected with the inner peripheral wall of the sleeve body. The blade comprises a first part and a second part, the first part extends along the radial direction of the water inlet, the first end of the first part is arranged close to the water inlet, the second part is obliquely arranged relative to the first part, the first end of the second part is connected with the second end of the first part, and the second end of the second part is jointed with the inner peripheral wall of the sleeve body. This structure is favorable to improving impeller slew velocity.

Preferably, the impeller is restrained in the bottom opening of the nozzle through a limiting structure, and the impeller and the nozzle rotate synchronously.

The utility model discloses in, the open internal perisporium in nozzle bottom is provided with the first ring gear of arranging along circumference, and is corresponding, the periphery wall of the cover body is provided with the second ring gear that can mesh with this first ring gear mutually, first ring gear cooperates with the second ring gear jointly and constitutes limit structure. By adopting the structure, the nozzle is driven to rotate by the rotation of the impeller, and the rotating speed and the rotating stability of the nozzle are improved.

Preferably, the impeller is arranged at the bottom opening of the nozzle in a vertically floating manner relative to the nozzle through the matching of the first gear ring and the second gear ring, the volume of the water collecting cavity is reduced in the upward floating state of the impeller, and the volume of the water collecting cavity is increased in the downward floating state of the impeller. Because the water pressure in the flow channel of the spray arm is not always kept stable, a certain floating exists in the concrete water pressure related to the change of the washing environment and the real-time power of the motor, and the change of the water pressure directly influences the rotation stability and the jet stability of the nozzle; by adopting the structure, the impeller can float up and down along with the corresponding water pressure, and the flow of the jet flow of the nozzle is balanced to a certain extent by changing the volume of the water collecting cavity, so that the nozzle keeps a relatively stable rotating speed.

The utility model discloses in, set up on the roof of nozzle from the efflux cover that the water jet extends along the efflux direction at the edge, this efflux sheathes in and has put the air inlet cover, this air inlet cover with be formed with the clearance between the efflux cover, thereby the lateral part of efflux cover is seted up and is supplied external air and clearance to be linked together the inlet channel with air suction clearance department under the jet water column state. In the jet process, negative pressure is generated at the gap, so that outside air is sucked into the air inlet channel and mixed with the water column through the air inlet channel to form a cavitation water column carrying air, and when the cavitation water column strikes the surface of the cleaned object, bubbles are broken instantly to improve the stripping force on pollutants, thereby improving the cleaning effect.

Preferably, the jet sleeve is provided with an outer sleeve surrounding the periphery of the jet sleeve at a position close to the upper port, the air inlet sleeve is sleeved in the outer sleeve, the gap is formed between the lower port of the air inlet sleeve and the upper port of the outer sleeve, the air inlet channel is arranged between the outer sleeve and the jet sleeve, the upper end of the air inlet channel is communicated with the gap, and the lower end of the air inlet channel extends below the outer sleeve. The structure surrounds the gap and the air inlet channel for protection, so as to prevent blockage.

Preferably, the lower end of the air inlet sleeve abuts against the upper end face of the jet flow sleeve, the inner diameter of at least the lower portion of the air inlet sleeve is gradually increased from top to bottom to form a conical section, and the lower end of the conical section corresponds to the upper end of the air inlet channel and forms a gap. The inner diameter of the upper part of the air inlet sleeve is larger than that of the jet flow sleeve.

A spray arm is provided with a water outlet on the top wall and also comprises the nozzle which can be rotatably connected at the water outlet.

Preferably, be formed with into water clearance between impeller bottom and the interior diapire of spray arm, cover body bottom is provided with the spacing post that can prevent impeller diapire and spray arm's interior diapire and contact mutually. The structure can keep the impeller suspended all the time without influencing the water inlet of the water inlet.

In order to facilitate assembly, a supporting platform which can be abutted against the inner top wall of the spray arm is arranged on the outer peripheral wall of the nozzle; and/or a bulge matched with the outer top wall of the spray arm for limiting is arranged on the outer peripheral wall of the top of the nozzle.

Preferably, the water jet holes are arranged in two groups and symmetrically on two sides of the water inlet, and the inclination directions of the two water jet holes are opposite. By adopting the structure, the nozzle is driven to rotate more smoothly and stably by matching with the impeller.

The cleaning machine comprises a box body, a water pumping mechanism and the spraying arm, wherein the spraying arm can be rotatably arranged in the box body, and the water pumping mechanism is used for pumping water at the bottom of the box body into the spraying arm.

Compared with the prior art, the utility model has the advantages of: the utility model discloses set up the impeller in the nozzle bottom, under the rivers impact, the impeller rotates and drives the nozzle rotation, and the rotary power of nozzle comes from the impeller of arranging along its periphery, and the impeller is big with rivers contact surface, and can be better transmission rivers impact energy and thus drive the nozzle rotation, be favorable to increasing nozzle rotational speed and stability to improve the cleanliness factor in the spray range; the utility model discloses an impeller will catchment the chamber and seal relatively, make the rivers that get into the nozzle flow more stably, and be convenient for with water towards the water jet reposition of redundant personnel to reduce energy loss, improve the injection lift of nozzle.

Drawings

FIG. 1 is a schematic structural view of a nozzle according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a nozzle in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a nozzle (hidden impeller) according to an embodiment of the present invention;

fig. 4 is a bottom view (with the impeller hidden) of the nozzle of the embodiment of the present invention;

fig. 5 is a schematic structural view of an impeller according to an embodiment of the present invention;

fig. 6 is a schematic bottom structure view of an impeller according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a spray arm according to an embodiment of the present invention;

fig. 8 is a sectional view of a spray arm according to an embodiment of the present invention.

Detailed Description

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

As shown in fig. 1 to 8, the nozzle of the present embodiment is used for being rotatably connected to the water outlet of the water spraying member, and the water spraying member of the present embodiment is a spray arm of a dishwasher, but is not limited to the spray arm.

In this embodiment, the nozzle 2 is a disc and has a hollow water collecting cavity 21, the bottom of the nozzle 2 is open to form a bottom opening 22, the top of the nozzle 2 is provided with a water spraying opening 23 which is obliquely arranged and communicated with the water collecting cavity 21, the bottom opening 22 of the nozzle 2 is provided with an impeller 3 which can drive the nozzle 2 to rotate under the impact of water flow, the impeller 3 is embedded in the bottom opening 22 to seal the water collecting cavity 21, and the central part of the impeller 3 is provided with a water inlet 311 for water in the flow channel 11 to enter the water collecting cavity 21.

The impeller 3 includes a top cover 31 and a sleeve 32 extending downward from an outer edge of the top cover 31, the top cover 31 and the sleeve 32 together enclose a semi-enclosed cavity 312 with a downward opening, a water inlet 311 is opened at a central portion of the top cover 31, and a vane 33 capable of rotating under water flow impact is disposed in the semi-enclosed cavity 312. The above structure enables the impeller 3 to generate a large rotation speed under the impact of water flow, and also prevents the blades 33 from circumferentially dispersing water flow to affect the water inflow of the water inlet 311, so as to maintain a large water flow in the nozzle 2.

The top cover 31 is gradually depressed downwards from the edge to the water inlet 311 at the center, the water outlet 23 of the nozzle 2 is arranged corresponding to the edge of the top cover 31, and the upper surface of the top cover 31 forms a guide arc surface 313 for guiding the water flow sent upwards from the water inlet 311 to the water outlet 23 along the radial direction. By adopting the structure, water entering the water collecting cavity 21 can be quickly divided and guided, energy loss caused by disorder of water flow due to impact in the water collecting cavity 21 is avoided, and the sprayed water column of the nozzle 2 keeps higher lift and impact force.

The vanes 33 are plural and circumferentially spaced on the lower surface of the top cover 31, and the outer ends of the vanes 33 are engaged with the inner peripheral wall of the sheath 32. The vane 33 comprises a first part 331 and a second part 332, the first part 331 extends along the radial direction of the water inlet 311, the first end is arranged near the water inlet 311, the second part 332 is arranged obliquely relative to the first part 331, the first end is connected with the second end of the first part 331, and the second end is connected with the inner peripheral wall of the sleeve body 32. This structure is advantageous for increasing the rotation speed of the impeller 3.

In the present embodiment, the inner peripheral wall of the bottom opening 22 of the nozzle 2 is provided with a first gear ring 221 arranged along the circumferential direction, and correspondingly, the outer peripheral wall of the jacket body 32 is provided with a second gear ring 321 capable of meshing with the first gear ring 221. Adopt above-mentioned structure to the rotation through impeller 3 drives nozzle 2 and rotates, improves nozzle 2 rotational speed and rotational stability.

In this embodiment, a jet sleeve 26 extending from the water jet 23 along the jet direction is disposed on the top wall of the nozzle 2, the air inlet sleeve 4 is sleeved on the jet sleeve 26, a gap 001 is formed between the air inlet sleeve 4 and the jet sleeve 26, and an air inlet channel 002 for allowing the outside air to communicate with the gap 001 so as to suck the air into the gap 011 in the state of the jet water column is disposed on the side portion of the jet sleeve 26. In the jet process, negative pressure is generated at the gap 011, so that outside air is sucked into the air inlet channel 002 and mixed with the water column to form a cavitation water column carrying air, and the stripping force on pollutants can be improved instantly when bubbles are broken when the cavitation water column strikes the surface of the cleaned object, thereby improving the cleaning effect.

The jet flow sleeve 26 is provided with an outer sleeve 261 surrounding the periphery of the jet flow sleeve 26 at a position close to the upper port, the air inlet sleeve 4 is sleeved in the outer sleeve 261, a gap 001 is formed between the lower port of the air inlet sleeve 4 and the upper port of the outer sleeve 261, an air inlet passage 002 is opened between the outer sleeve 261 and the jet flow sleeve 26, the upper end of the air inlet passage is communicated with the gap 001, and the lower end of the air inlet passage extends to the position below the outer sleeve 261. This structure surrounds the gap 001 and the air intake passage 002 to protect them from clogging.

The lower end of the air inlet sleeve 4 is abutted against the upper end face of the jet flow sleeve 26, the inner diameter of the lower part of the air inlet sleeve 4 is gradually increased from top to bottom to form a conical section 41, and the lower end of the conical section 41 corresponds to the upper end of the air inlet channel 002 and forms a gap 001. The inner diameter of the upper part of the air inlet sleeve 4 is larger than that of the jet sleeve 26.

The spray arm of this embodiment includes body 1 that extends along length direction, and the inside cavity of body 1 forms runner 11, and the central part of body 1 diapire is provided with water inlet 12 that is linked together with runner 11, opens on body 1 roof and has a plurality of hole for water spraying 13 that is linked together with runner 11, still opens on body 1 roof and has the delivery port 14 that is close to runner 11 tip and arranges, and nozzle 2 can connect in this delivery port 14 department with rotating.

The impeller 3 is arranged at the bottom opening 22 of the nozzle 2 in a vertically floating manner relative to the nozzle 2 through the matching of the first gear ring 221 and the second gear ring 321, the volume of the water collecting cavity 21 is reduced when the impeller 3 is in an upward floating state, and the volume of the water collecting cavity 21 is increased when the impeller 3 is in a downward floating state. Because the water pressure in the flow channel 11 of the spray arm is not always kept stable, a certain floating exists in the concrete water pressure related to the change of the washing environment and the real-time power of the motor, and the change of the water pressure directly influences the rotation stability and the jet stability of the nozzle; by adopting the structure, the impeller can float up and down along with the corresponding water pressure, and the flow of the jet flow of the nozzle is balanced to a certain extent by changing the volume of the water collecting cavity, so that the nozzle keeps a relatively stable rotating speed.

A water inlet gap 300 is formed between the bottom of the impeller 3 and the inner bottom wall of the spray arm, and a limiting column 322 which can prevent the bottom wall of the impeller 3 from contacting with the inner bottom wall of the spray arm is arranged at the bottom of the sleeve body 32. This structure allows the impeller 3 to remain suspended at all times without affecting the intake water at the water inlet 311.

For the convenience of assembly, the peripheral wall of the nozzle 2 is provided with a pedestal 24 which can abut against the inner top wall of the spray arm. The outer peripheral wall of the top of the nozzle 2 is provided with a bulge 25 which is matched with the outer top wall of the spray arm for limiting.

The water outlets 23 of the present embodiment are two groups and are symmetrically arranged on both sides of the water inlet 311, and the inclination directions of the two water outlets 23 are opposite. By adopting the structure, the nozzle 2 is driven by matching with the impeller 3 to rotate more smoothly and stably.

The cleaning machine of this embodiment includes box and pump water mechanism (not shown in the figure), still includes above-mentioned spray arm 1, and spray arm 1 can locate in the box with rotating, and pump water mechanism is arranged in pump to spray arm 1 with the water pump of bottom half.

In the embodiment, the spray arm is provided with the nozzle 2 which can rotate along with the spray arm and rotate simultaneously, and the water column sprayed by the nozzle 2 is matched with the water column sprayed by the water spray hole 13, so that the cleaning range can be favorably diffused, the cleaning dead angle can be eliminated, and the cleaning effect can be improved; in the embodiment, the impeller 3 is arranged at the bottom of the nozzle 2, under the impact of water flow in the spray arm, the impeller 3 rotates to drive the nozzle 2 to rotate, the rotating power of the nozzle 2 comes from the impeller 3 arranged along the periphery of the nozzle, the contact surface of the impeller 3 and the water flow is large, and the impact energy of the water flow can be better transmitted to drive the nozzle 2 to rotate, so that the rotating speed and the stability of the nozzle 2 can be increased, and the cleaning degree in a spray range can be improved; the impeller 3 of this embodiment closes the water collecting cavity 21 relatively, makes the water flow that gets into the nozzle 2 more stable, and is convenient for shunt water towards the water jet 23 to reduce energy loss, improve the injection lift of nozzle 2.

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 (14)

1. A nozzle for a washing machine, for connection with a water outlet (14) of a water-ejecting member, the nozzle being disc-shaped and having a hollow water collection chamber (21), the nozzle being open-bottomed to form an open-bottomed mouth (22), open topped to have a water ejection opening (23) arranged obliquely with respect to the upper surface of the top and communicating with the water collection chamber (21), characterized in that: the impeller (3) capable of driving the nozzle (2) to rotate under the impact of water flow is installed at the bottom opening (22) of the nozzle (2), the impeller (3) is embedded in the bottom opening (22) so as to seal the water collecting cavity (21), and a water inlet (311) for water in a flow channel to enter the water collecting cavity (21) is formed in the central part of the impeller (3).

2. The nozzle for a washing machine as claimed in claim 1, characterized in that: the impeller (3) comprises a top cover (31) and a sleeve body (32) extending downwards from the outer edge of the top cover (31), the top cover (31) and the sleeve body (32) jointly enclose a semi-enclosed cavity (312) with a downward opening, the water inlet (311) is arranged at the central part of the top cover (31), and blades (33) capable of rotating under water flow impact are arranged in the semi-enclosed cavity (312).

3. The nozzle for a washing machine as claimed in claim 2, characterized in that: the top cover (31) is gradually sunken downwards from the edge to the water inlet (311) at the center of the top cover, the water spray opening (23) of the nozzle (2) is arranged corresponding to the edge of the top cover (31), and the upper surface of the top cover (31) forms a flow guide arc surface (313) for guiding the water flow conveyed upwards from the water inlet (311) to the water spray opening (23) along the radial direction.

4. The nozzle for a washing machine as claimed in claim 3, characterized in that: the vanes (33) are multiple and distributed on the lower surface of the top cover (31) at intervals along the circumferential direction, and the outer ends of the vanes (33) are connected with the inner peripheral wall of the sleeve body (32).

5. The nozzle for a washing machine as claimed in claim 4, wherein: the blade (33) comprises a first part (331) and a second part (332), the first part (331) extends along the radial direction of the water inlet (311) and has a first end arranged close to the water inlet (311), the second part (332) is arranged obliquely relative to the first part (331) and has a first end connected with a second end of the first part (331) and a second end connected with the inner peripheral wall of the sleeve body (32).

6. A nozzle for a cleaning machine according to any one of claims 2 to 5 wherein: the impeller (3) is restrained in the bottom opening (22) of the nozzle through a limiting structure, and the impeller (3) and the nozzle rotate synchronously.

7. The nozzle for a washing machine as claimed in claim 6, characterized in that: the internal perisporium of nozzle (2) bottom uncovered (22) is provided with along first ring gear (221) that circumference was arranged, and is corresponding, the periphery wall of the cover body (32) is provided with second ring gear (321) that can mesh with this first ring gear (221), first ring gear and second ring gear cooperate jointly to constitute limit structure.

8. The nozzle for a washing machine as claimed in claim 6, wherein: impeller (3) can locate the open (22) department in bottom of nozzle (2) through the cooperation of first ring gear (221) with second ring gear (321) with floating from top to bottom for nozzle (2), under impeller (3) upwards floating state, the volume in water collecting cavity (21) reduces, under impeller (3) downwards floating state, the volume in water collecting cavity (21) increases.

9. A nozzle for a cleaning machine according to any one of claims 1 to 5 wherein: the roof of nozzle (2) is last to set up from water jet (23) along edge along efflux direction extension efflux cover (26), and air inlet cover (4) have been put to the cover on this efflux cover (26), this air inlet cover (4) with be formed with clearance (001) between efflux cover (26), thereby air inlet channel (002) that supply outside air and clearance (001) to be linked together with air suction clearance (001) department under the injection water column state are seted up to the lateral part of efflux cover (26).

10. The nozzle for a washing machine as claimed in claim 9, characterized in that: efflux cover (26) are being provided with outer cover (261) that surround efflux cover (26) periphery and arrange near upper port department, air inlet cover (4) cover is put in this outer cover (261), clearance (001) are formed between the lower port of air inlet cover (4) and the upper port of outer cover (261), inlet channel (002) are seted up between outer cover (261) and efflux cover (26) and upper end and clearance (001) are linked together, the lower extreme extends to under outer cover (261).

11. A nozzle for a washing machine as claimed in claim 10, wherein: the lower extreme of air inlet sleeve (4) offsets with the up end of efflux cover (26), the internal diameter of the at least lower part of air inlet sleeve (4) top-down crescent forms toper section (41), and the lower extreme of this toper section (41) corresponds the upper end of inlet channel (002) and forms clearance (001).

12. A nozzle for a cleaning machine as defined in claim 11, wherein: the inner diameter of the upper part of the air inlet sleeve (4) is larger than that of the jet flow sleeve (26).

13. The utility model provides a spray arm, has seted up delivery port (14) on the roof, its characterized in that: the nozzle of any one of claims 1 to 12, further comprising a nozzle rotatably connected to the water outlet (14).

14. The utility model provides a cleaning machine, includes box and pump water mechanism, its characterized in that: the spray arm of claim 13, further comprising a spray arm rotatably disposed within the housing, the water pumping mechanism for pumping water from the bottom of the housing into the spray arm.

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