CN220344350U - Spray arm for cleaning machine and cleaning machine - Google Patents

Abstract

The utility model relates to a spray arm for a cleaning machine and the cleaning machine, wherein a flow channel is formed in a hollow mode in a spray arm body, a water inlet communicated with the flow channel is formed in the bottom wall of the body, a plurality of spray holes which are distributed at intervals and communicated with the flow channel are formed in the top wall of the body, the spray holes comprise a first spray hole and a second spray hole which are close to the central part of the body, the first spray hole is arranged close to a first side wall of the flow channel, and the second spray hole is arranged close to a second side wall of the flow channel opposite to the first side wall. The top wall of the spray arm is provided with a plurality of spray holes, the spray holes comprise a first spray hole and a second spray hole which are close to the central part of the body, the first spray hole and the second spray hole can be used for washing tableware in the center of the washing cavity, the first spray hole is close to the first side wall of the flow channel, the second spray hole is close to the second side wall of the flow channel opposite to the first side wall, and the flow rate of the sprayed water to the central part of the washing cavity is further increased, so that the washing purity is improved.

Description

Spray arm for cleaning machine and cleaning machine

Technical Field

The utility model relates to the technical field of dish washing machines, in particular to a spray arm for a cleaning machine for cleaning tableware and fruits and vegetables and the cleaning machine.

Background

With the improvement of living standard of people, dish washers are becoming common equipment in kitchens. The dishwasher is generally provided with a spray arm which sprays upwards and a water pumping mechanism which is used for pumping water at the bottom of the box body into the spray arm, so that water circulation is continuously completed, and tableware above the spray arm is washed.

For example, chinese patent publication No. CN215191353U, a spray arm of dish washer (application No. CN 202120538494.4) discloses a structure, wherein the spray arm comprises an upper spray arm, a lower spray arm and a deflector, the lower part of the lower spray arm is provided with a water inlet, and the upper spray arm is provided with a plurality of spray holes; the guide vane is arranged in the cavity between the upper spray arm and the lower spray arm, the guide vane is clamped on the upper spray arm, and the guide vane is arranged on the upper part of the central axis of the water inlet. The structure is beneficial to increasing the water inflow and reducing the water pressure loss, thereby improving the cleanliness.

When more tableware are placed in the washing cavity, the density of the tableware placed in the central part of the washing cavity is relatively high. The central part of the general spray arm is not provided with a spray hole, and the flow of the spray water column for the tableware at the central part of the washing cavity can not meet the requirement, so that the overall cleaning degree is poor.

Disclosure of Invention

The first technical problem to be solved by the utility model is to provide a spray arm for a cleaning machine, which can improve the washing flow of tableware at the central part of a washing cavity so as to improve the cleanliness.

The second technical problem to be solved by the utility model is to provide a cleaning machine with the spray arm aiming at the current state of the art.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a spray arm for cleaning machine, includes the body that extends along length direction, this body inside cavity forms the runner, the diapire of body is opened there is the water inlet that is linked together with the runner, the roof of body is opened there is a plurality of intervals and is arranged and be linked together with the runner's orifice, the orifice is including first orifice, the second orifice that is close to body central part, two relative lateral walls between connecting body roof and the body diapire in the runner are first lateral wall, second lateral wall respectively, first orifice is close to the first lateral wall arrangement of runner, the second orifice is close to the second lateral wall arrangement that is opposite with first lateral wall of runner.

Preferably, the first spray hole and the second spray hole are obliquely arranged on the top wall of the body, and the oblique directions of the first spray hole and the second spray hole are opposite. The first spray hole and the second spray hole which are obliquely arranged are beneficial to expanding the spray range, and the two spray holes are opposite in oblique direction, so that the spray range is further expanded, the water flow impact force is balanced, and the rotation stability of the spray arm is improved.

Preferably, the first nozzle hole is inclined towards the first side wall direction of the flow channel, and the second nozzle hole is inclined towards the second side wall direction of the flow channel. This structure is advantageous in expanding the cleaning range.

Preferably, the inclination angle a of the first spray hole and/or the second spray hole relative to the rotation plane of the body is 70-80 degrees. The first spray hole and the second spray hole are arranged close to the central part of the spray arm, and the inclination angles of the first spray hole and the second spray hole are larger, so that the tableware at the central part of the bowl basket can be washed in a concentrated manner, and the cleanliness of the tableware at the central part can be improved.

Preferably, the water inlet is located at the central part of the bottom wall of the body, a downward protruding guide cone is formed on the inner top wall of the flow channel at the position corresponding to the water inlet, and the first spray hole and the second spray hole are symmetrically arranged relative to the guide cone. The diversion cone diverts water to two sides of the flow channel, which is beneficial to reducing the energy loss of the fluid; the first spray holes and the second spray holes are symmetrically arranged on two sides of the guide cone, so that water flow on two sides is balanced, and the rotation stability of the spray arm is improved.

Preferably, a first edge extending along the length direction of the flow channel and crossing the flow guiding cone is formed at the central part of the top wall of the flow channel, a first flow guiding inclined plane is formed by inclining part of the top wall of the flow channel from the first edge to the first side wall from top to bottom, a second flow guiding inclined plane is formed by inclining part of the top of the flow channel from the first edge to the second side wall from top to bottom, the first spray hole is positioned in the first flow guiding inclined plane, and the second spray hole is positioned in the second flow guiding inclined plane. The first diversion inclined plane and the second diversion inclined plane are beneficial to diverting the water flow entering the center of the flow channel from the water inlet, so that the energy loss of the fluid is reduced; meanwhile, the upper surfaces of the bodies corresponding to the two diversion inclined planes can be used for guiding the residual water to the edge of the spray arm, so that the accumulation of the residual water is avoided.

Preferably, from a bottom view, the first diversion slope is a first trapezoid structure with a width gradually decreasing from the first side wall to the first edge, the second diversion slope is a second trapezoid structure with a width gradually decreasing from the second side wall to the first edge, and the first trapezoid structure and the second trapezoid structure are symmetrically arranged relative to the first edge. The central part of the diversion inclined plane self-flowing channel is gradually increased to the two side walls, which is beneficial to gradually increasing the pressurizing surface of the water flow in the diversion channel along the water flow direction, and the jet orifice at the end part of the main body is kept to have higher lift.

Preferably, the first nozzle is disposed near a first oblique side of the first trapezoid structure, the second nozzle is disposed near a second oblique side of the second trapezoid structure, and the first oblique side is disposed opposite to the second oblique side. The first oblique side is parallel to the second oblique side. The structure is favorable for balancing water flow at two sides of the flow channel and improving the rotation stability of the spray arm.

Preferably, the top wall of the body is provided with a third diversion inclined plane which gradually inclines downwards along the water flow direction from the intersection of the inclined sides of the first trapezoid structure and the second trapezoid structure, and the third diversion inclined planes are two groups and are symmetrically arranged relative to the water inlet. The third diversion inclined plane is used for further pressurizing water flow at the end part of the flow channel on one hand, and is convenient for discharging residual water in the flow channel on the other hand, so that no residual water in the flow channel is realized.

Preferably, the top wall of the body is provided with a plurality of spray holes positioned in the third diversion inclined plane, and each spray hole positioned in the third diversion inclined plane is obliquely arranged at multiple angles. The spray coverage of the spray holes inclined at multiple angles to the whole bowl basket area, especially to other large-area areas except the central part of the bowl basket, can be increased, so that the cleaning effect is improved.

Preferably, a third spray hole close to a third inclined edge of the second trapezoid structure is arranged in a third diversion inclined surface close to the first end of the body, a fourth spray hole close to a fourth inclined edge of the first trapezoid structure is arranged in the third diversion inclined surface close to the second end of the body, and the third spray hole and the fourth spray hole are symmetrically arranged relative to the water inlet. The number of the third spray holes and the fourth spray holes can be two, the third spray holes and the first spray holes are obliquely arranged in a row in the width direction of the flow channel, the fourth spray holes and the second spray holes are obliquely arranged in a row in the width direction of the flow channel, and the two rows of holes are approximately parallel. The two groups of holes can both spray at the central part of the bowl basket and spray at other large-area areas of the bowl basket, thereby being beneficial to further eliminating the cleaning dead angle and improving the cleaning effect.

Preferably, the bottom wall of the body is provided with a slag sweeping hole which is arranged towards the water inlet.

Preferably, auxiliary spray holes which extend obliquely and are used for accelerating the spray arm and impacting the inner wall of the washing cavity are respectively formed in the two end walls of the flow channel.

Preferably, the top wall of the body is provided with a water outlet close to the end part, the water outlet is rotatably connected with a nozzle capable of rotating relative to the body, and the nozzle is provided with at least two spray holes. The spray nozzle is positioned at the end part of the spray arm, and can rotate along with the rotation of the spray arm, so that the spray nozzle sprays on the periphery of the bowl basket and the inner side wall of the washing cavity, further eliminates the cleaning dead angle and improves the cleaning effect.

Preferably, the top of the body is provided with top plates arranged at intervals, the air collecting cavity is enclosed between the top plates and the top wall of the body, the top plates are provided with jet holes corresponding to the jet holes, and gaps for air to be sucked into jet water columns in the jet state are formed between the jet holes and the jet holes. According to the Venturi effect, when the water column passes through the spray hole and the jet hole, negative pressure is generated at the gap, so that air around the water column is sucked into the water column, a cavitation water column with bubbles is formed, when the cavitation water column is hit on the surface of an object to be cleaned, the stripping force to pollutants can be increased instantaneously due to the bubble breaking, and the cleaning effect is improved.

The utility model provides a cleaning machine, includes the box, the bottom half is provided with the backwater region of indent, and the top in this backwater region is covered with the filter, still includes above-mentioned spray arm, and this spray arm can locate rotationally on the filter its through pump water mechanism with backwater region be linked together.

Preferably, a bowl basket for placing tableware is arranged in the box body, the tableware is placed in the bowl basket along the side edge of the bowl basket in a anticlockwise direction in a clockwise rotating state of the spray arm, and an opening of the tableware faces the anticlockwise direction of the side edge of the bowl basket. By adopting the structure, the arrangement of the spray holes on the spray arm can be better matched, and the cleaning effect is improved.

Compared with the prior art, the utility model has the advantages that: the top wall of the spray arm is provided with a plurality of spray holes, the spray holes comprise a first spray hole and a second spray hole which are close to the central part of the body, the first spray hole and the second spray hole can be used for washing tableware in the center of the washing cavity, the first spray hole is close to the first side wall of the flow channel, the second spray hole is close to the second side wall of the flow channel opposite to the first side wall, and the flow rate of the sprayed water to the central part of the washing cavity is further increased, so that the washing purity is improved.

Drawings

FIG. 1 is a schematic view of a spray arm according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a part of a flow channel structure of a spray arm according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of FIG. 3;

fig. 5 is a schematic structural view of a cleaning machine according to an embodiment of the utility model.

Detailed Description

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

As shown in fig. 1 to 3, the shower arm for a cleaning machine according to the present embodiment includes a body 1 extending in a longitudinal direction, a flow passage 11 is formed in the body 1, and the flow passage 11 also extends in the longitudinal direction of the body. The bottom wall of the body 1 is provided with a water inlet 12 communicated with the flow channel 11, the top wall of the body 1 is provided with a plurality of spray holes 13 which are distributed at intervals and communicated with the flow channel 11, each spray hole 13 comprises a first spray hole 131 and a second spray hole 132 which are close to the central part of the body 1, the first spray hole 131 is close to the first side wall 111 of the flow channel 11, and the second spray hole 132 is close to the second side wall 112 of the flow channel 11 opposite to the first side wall 111.

In this embodiment, the top wall of the spray arm is provided with a plurality of spray holes 13, the spray holes 13 include a first spray hole 131 and a second spray hole 132 near the central part of the body 1, the first spray hole 131 and the second spray hole 132 can focus on washing the tableware in the center of the washing chamber, the first spray hole 131 is near the first side wall 111 of the runner, the second spray hole 132 is near the second side wall 112 of the runner 11 opposite to the first side wall 111, and the flow rate of the sprayed water to the central part of the washing chamber is further increased to improve the cleanliness.

The first nozzle 131 and the second nozzle 132 are disposed on the top wall of the body 1 in an inclined manner, and the inclined directions of the two nozzle are opposite. The first nozzle 131 is inclined toward the first sidewall 111 of the flow channel 11, and the second nozzle 132 is inclined toward the second sidewall 112 of the flow channel 11. The first spray hole 131 and the second spray hole 132 which are obliquely arranged are beneficial to expanding the spray range, and the two spray holes are opposite in oblique direction, so that the spray range is further expanded, the water flow impact force is balanced, and the rotation stability of the spray arm is improved. The inclination angle a of the first nozzle hole 131 and the second nozzle hole 132 with respect to the rotation plane of the main body 1 is 70 to 80 °. The first spray hole 131 and the second spray hole 132 are arranged close to the central part of the spray arm, and the inclination angles of the first spray hole and the second spray hole are set larger, so that the tableware at the central part of the bowl basket can be washed in a concentrated manner, and the cleanliness of the tableware at the central part can be improved.

The water inlet 12 of the present embodiment is located at the central portion of the bottom wall of the body 1, the inner top wall of the flow channel 11 is formed with a downward protruding guide cone 14 at the position corresponding to the water inlet 12, and the first spray hole 131 and the second spray hole 132 are symmetrically arranged relative to the guide cone 14. The diversion cone 14 diverts water to the two sides of the flow channel 11, which is beneficial to reducing the energy loss of the fluid; the first spray holes 131 and the second spray holes 132 are symmetrically arranged at two sides of the diversion cone 14, which is also beneficial to balancing water flow at two sides and improving the rotation stability of the spray arm.

In the present embodiment, a first edge 10 extending along the length direction of the flow channel 11 and crossing the flow guiding cone 14 is formed at the central portion of the top wall of the flow channel 11, a first flow guiding inclined plane 100 is formed by tilting a part of the top wall of the flow channel 11 from the first edge 10 to the first side wall 111 from top to bottom, a second flow guiding inclined plane 200 is formed by tilting a part of the top of the flow channel 11 from the first edge 10 to the second side wall 112 from top to bottom, the first spray hole 131 is located in the first flow guiding inclined plane 100, and the second spray hole 132 is located in the second flow guiding inclined plane 200. The first diversion inclined plane 100 and the second diversion inclined plane 200 are beneficial to diverting the water flow entering the center of the flow channel 11 from the water inlet 12, and reduce the energy loss of the fluid; meanwhile, the upper surfaces of the bodies 1 corresponding to the two diversion inclined planes can be used for guiding the residual water to the edge of the spray arm, so that the accumulation of the residual water is avoided.

From a bottom view, the first diversion slope 100 is a first trapezoid structure with a width gradually decreasing from the first side wall 111 to the first edge 10, the second diversion slope 200 is a second trapezoid structure with a width gradually decreasing from the second side wall 112 to the first edge 10, and the first trapezoid structure and the second trapezoid structure are symmetrically arranged relative to the first edge 10. The diversion inclined plane is gradually increased from the central part of the flow channel 11 to the two side walls, so that the pressurizing surface for the water flow in the flow channel 11 is gradually increased along the water flow direction, and the spray hole at the end part of the body is kept to have higher lift.

The first nozzle 131 is disposed near the first inclined side 101 of the first trapezoid, the second nozzle 132 is disposed near the second inclined side 202 of the second trapezoid, and the first inclined side 101 is disposed opposite to the second inclined side 202. The first oblique side 101 is arranged in parallel with the second oblique side 202. The structure is favorable for balancing water flow at two sides of the flow channel 11 and improving the rotation stability of the spray arm.

In this embodiment, the top wall of the body 1 is formed with a third diversion slope 300 gradually inclined downward along the water flow direction from the intersection of the oblique sides of the first trapezoid structure and the second trapezoid structure, and the third diversion slopes 300 are two groups and are symmetrically arranged relative to the water inlet 12. The third diversion slope 300 further pressurizes the water flow at the flow passage end 11, and on the other hand, facilitates the drainage of the residual water in the flow passage 11, thereby realizing no residual water in the flow passage.

The top wall of the body 1 is provided with a plurality of spray holes 13 positioned in the third diversion inclined plane 300, and each spray hole 13 positioned in the third diversion inclined plane 300 is obliquely arranged at multiple angles. In this embodiment, 6 spray holes 13 are disposed in each third diversion slope 300. The spray coverage of the spray holes inclined at multiple angles to the whole bowl basket area, especially to other large-area areas except the central part of the bowl basket, can be increased, so that the cleaning effect is improved.

A third spray hole 133 close to the third inclined edge 203 of the second trapezoid structure is arranged in the third inclined diversion surface 300 close to the first end of the body 1, a fourth spray hole 134 close to the fourth inclined edge 104 of the first trapezoid structure is arranged in the third inclined diversion surface 300 close to the second end of the body 1, and the third spray hole 133 and the fourth spray hole 134 are symmetrically arranged relative to the water inlet 12. The number of the third nozzle holes 133 and the fourth nozzle holes 134 may be two, the third nozzle holes 133 and the first nozzle holes 131 may be arranged in a row inclined in the width direction of the flow channel 11, the fourth nozzle holes 134 and the second nozzle holes 132 may be arranged in a row inclined in the width direction of the flow channel 11, and the two rows of holes may be approximately parallel. The two groups of holes can both spray at the central part of the bowl basket and spray at other large-area areas of the bowl basket, thereby being beneficial to further eliminating the cleaning dead angle and improving the cleaning effect.

The bottom wall of the body 1 of the embodiment is provided with a slag sweeping hole 15 which is arranged towards the direction of the water inlet 12, so as to improve slag collecting effect and avoid slag accumulation on the filter plate. The two end walls of the runner 11 are respectively provided with auxiliary spray holes 16 which extend obliquely and are used for accelerating the spray arm and impacting the inner wall of the washing cavity.

In this embodiment, the apertures of the first, second, third and fourth injection holes 131, 132, 133, 134 are smaller than those of the other injection holes 13, the apertures of the first, second, third and fourth injection holes 131, 132, 133, 134 are 2.5mm, and the apertures of the other injection holes 13 are 3mm.

The top wall of the body 1 is provided with a water outlet 17 which is arranged near the end, the water outlet 17 is rotatably connected with a nozzle 2 which can rotate relative to the body 1, and the nozzle 2 is provided with at least two spray holes 21. The spray nozzle 2 is positioned at the end part of the spray arm, and can rotate along with the rotation of the spray arm, so that spraying is performed on the periphery of the bowl basket and the inner side wall of the washing cavity, further cleaning dead angles are eliminated, and the cleaning effect is improved.

The top of the body 1 is provided with top plates 3 which are arranged at intervals, an air collecting cavity 30 is enclosed between the top plates 3 and the top wall of the body 1, jet holes 31 which are arranged corresponding to the jet holes 13 are arranged on the top plates 30, and gaps 32 which can be used for sucking air into jet water columns in a jet state are formed between the jet holes 31 and the jet holes 13. According to the venturi effect, when the water column passes through the spray hole 13 and the spray hole 31, negative pressure is generated at the gap 32 so as to suck the surrounding air into the water column, so that a cavitation water column with bubbles is formed, and when the cavitation water column hits the surface of the object to be cleaned, the stripping force to pollutants can be increased at the moment of bubble breaking, and the cleaning effect is improved.

As shown in fig. 4 and 5, the cleaning machine of this embodiment includes a box 5, a concave backwater area is provided at the bottom of the box, and a filter plate is covered at the top of the backwater area, and the cleaning machine further includes the spray arm, which is rotatably disposed on the filter plate and is communicated with the backwater area through a water pumping mechanism.

The bowl basket 4 for placing tableware is arranged in the box body, and in a clockwise rotation state of the spray arm, the tableware is placed in the bowl basket 4 along the side edge of the bowl basket 4 in the anticlockwise direction, and the opening of the tableware faces the anticlockwise direction of the side edge of the bowl basket 4. By adopting the structure, the arrangement of the spray holes on the spray arm can be better matched, and the cleaning effect is improved.

In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present utility model, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the utility model may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.

Claims (18)

1. The utility model provides a spray arm for cleaning machine, includes body (1) that extends along length direction, this body (1) inside cavity and be formed with runner (11), body (1) are opened have water inlet (12) and a plurality of interval arrangement that are linked together with runner (11) and orifice (13) that are linked together with runner (11), connect two relative lateral walls between body (1) roof and body (1) diapire in runner (11) respectively be first lateral wall (111), second lateral wall (112), its characterized in that: the spray holes (13) comprise a first spray hole (131) and a second spray hole (132) which are close to the central part of the body (1), the first spray hole (131) is close to the first side wall (111) of the flow channel (11), and the second spray hole (132) is close to the second side wall (112) of the flow channel (11).

2. The spray arm for a cleaning machine of claim 1, wherein: the first spray holes (131) and the second spray holes (132) are obliquely arranged on the top wall of the body (1), and the oblique directions of the first spray holes and the second spray holes are opposite.

3. The spray arm for a cleaning machine of claim 2, wherein: the first spray hole (131) is inclined towards the direction of the first side wall (111) of the flow channel (11), and the second spray hole (132) is inclined towards the direction of the second side wall (112) of the flow channel (11).

4. The spray arm for a cleaning machine of claim 2, wherein: the inclination angle a of the first spray hole (131) and/or the second spray hole (132) relative to the rotation plane of the body (1) is 70-80 degrees.

5. The shower arm for a washer of any one of claims 1-4, wherein: the water inlet (12) is positioned at the central part of the bottom wall of the body (1), a downward-protruding guide cone (14) is formed on the inner top wall of the flow channel (11) at the position corresponding to the water inlet (12), and the first spray hole (131) and the second spray hole (132) are symmetrically arranged relative to the guide cone (14).

6. The spray arm for a cleaning machine of claim 5, wherein: the central part of runner (11) roof is formed with along runner (11) length direction extension and stride across first edge (10) of water conservancy diversion awl (14), the part of runner (11) roof forms first water conservancy diversion inclined plane (100) from this first edge (10) top-down slope to first lateral wall (111), the part at runner (11) top forms second water conservancy diversion inclined plane (200) from this first edge (10) top-down slope to second lateral wall (112), first orifice (131) be located first water conservancy diversion inclined plane (100), second orifice (132) be located second water conservancy diversion inclined plane (200).

7. The spray arm for a cleaning machine of claim 6, wherein: from the bottom view, first water conservancy diversion inclined plane (100) be from first lateral wall (111) to first edge (10) department width taper first trapezium structure, second water conservancy diversion inclined plane (200) be from second lateral wall (112) to first edge (10) department width taper second trapezium structure, first trapezium structure and second trapezium structure are for first edge (10) symmetrical arrangement.

8. The spray arm for a cleaning machine of claim 7, wherein: the first spray hole (131) is arranged close to a first inclined edge (101) of the first trapezoid structure, the second spray hole (132) is arranged close to a second inclined edge (202) of the second trapezoid structure, and the first inclined edge (101) and the second inclined edge (202) are arranged opposite to each other.

9. The spray arm for a cleaning machine of claim 8, wherein: the first oblique side (101) is arranged parallel to the second oblique side (202).

10. The spray arm for a cleaning machine of claim 7, wherein: the top wall of the body (1) is provided with a third diversion inclined plane (300) which gradually inclines downwards along the water flow direction from the junction of the inclined sides of the first trapezoid structure and the second trapezoid structure, and the third diversion inclined planes (300) are two groups and are symmetrically arranged relative to the water inlet (12).

11. The spray arm for a cleaning machine of claim 10, wherein: the top wall of the body (1) is provided with a plurality of spray holes (13) positioned in the third diversion inclined plane (300), and each spray hole (13) positioned in the third diversion inclined plane (300) is obliquely arranged at multiple angles.

12. The spray arm for a cleaning machine of claim 11, wherein: a third jet hole (13) which is close to a third oblique side (203) of the second trapezoid structure is arranged in a third diversion inclined plane (300) close to the first end of the body (1), a fourth jet hole (13) which is close to a fourth oblique side (104) of the first trapezoid structure is arranged in the third diversion inclined plane (300) close to the second end of the body (1), and the third jet hole (13) and the fourth jet hole (13) are symmetrically arranged relative to the water inlet (12).

13. The shower arm for a washer of any one of claims 1-4, wherein: the bottom wall of the body (1) is provided with a slag sweeping hole (15) which is arranged towards the water inlet (12).

14. The shower arm for a washer of any one of claims 1-4, wherein: auxiliary spray holes (16) which extend obliquely and are used for accelerating the spray arm and impacting the inner wall of the washing cavity are respectively formed in the two end walls of the flow channel (11).

15. The shower arm for a washer of any one of claims 1-4, wherein: the top wall of the body (1) is provided with a water outlet (17) which is arranged close to the end part, the water outlet (17) is rotationally connected with a nozzle (2) which can rotate relative to the body (1), and the nozzle (2) is provided with at least two spray holes (21).

16. The shower arm for a washer of any one of claims 1-4, wherein: the top of the body (1) is provided with a top plate (3) at intervals, an air collecting cavity (30) is enclosed between the top plate (3) and the top wall of the body (1), the top plate (3) is provided with a jet hole (31) which is arranged corresponding to the jet hole (13), and a gap (32) which can be used for sucking air into jet water columns in a jet state is formed between the jet hole (31) and the jet hole (13).

17. The utility model provides a cleaning machine, includes the box, the bottom half is provided with the return water region of indent, and this return water region's top covers has the filter, its characterized in that: further comprising a spray arm according to any one of claims 1 to 16 rotatably disposed above said filter plate in communication with a recirculation zone via a pumping mechanism.

18. The cleaning machine of claim 17, wherein: the novel bowl basket is characterized in that a bowl basket (4) for placing tableware is arranged in the box body, and in a clockwise rotation state of the spray arm, the tableware is placed in the bowl basket (4) along the side edge of the bowl basket in a anticlockwise direction, and an opening of the tableware faces the anticlockwise direction of the side edge of the bowl basket (4).