CN213129379U - Spray arm - Google Patents

Abstract

The utility model discloses a spray arm belongs to domestic cleaning device's technical field. The spraying arm comprises a shell and a water inlet pipe, wherein a water passing cavity is formed in the shell, the shell is provided with a water inlet and a plurality of spraying holes, the water inlet pipe is connected with the water inlet, water flow enters the water passing cavity from the water inlet through the water inlet and then is sprayed out from the spraying holes, and the wall part of the water inlet pipe is provided with at least one first air inlet hole so that the water inlet cavity formed by the water inlet pipe is communicated with the outside; the spray arm further comprises an air inlet part and a switch assembly, the first air inlet hole is opened by the air inlet part at the air inlet position, and after the switch assembly is rotated to unlock the air inlet part, the switch assembly is lifted or pressed to drive the air inlet part to move to the blocking position so as to close the first air inlet hole. Outside air forms a large amount of bubbles in getting into rivers for the density of rivers reduces, thereby has reduced rivers and has sprayed the impact force that the hole erupted from spraying, can be used to wash the lighter tableware of material and softer fruit vegetables, and the cleaning performance is good.

Description

Spray arm

Technical Field

The utility model relates to a spray arm belongs to domestic cleaning device field.

Background

A dishwasher is a cleaning device for automatically cleaning tableware and the like, and is mainly used for removing food residues, oil stains and other stains on the tableware and the like. The dish washer has a plurality of functions, and not only can wash tableware, but also can wash vegetables and fruits.

The dishwasher in the prior art is generally provided with a spray arm, the spray arm is provided with a plurality of spray holes, and washing water enters the spray arm and then is sprayed out through the spray holes to wash tableware and the like. The washing water is sprayed out through the spraying holes, so that the washing water has large impact force, and for light tableware and softer fruits and vegetables made of the materials, the light tableware is washed down or drifted by the large impact force of the water to be damaged, or the softer fruits and vegetables are easily damaged or broken by the large impact force of the water to influence the washing effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a spray arm, this spray arm pass through the setting of the first inlet port on the inlet tube, the position of admitting air the air inlet part is opened first inlet port, outside air forms a large amount of bubbles in getting into rivers through this first inlet port for the density of rivers reduces, thereby has reduced the impact force of rivers injection, can be used to wash the material and lighter tableware and softer fruit vegetables, and the cleaning performance is good, and the scope of the washing thing of being suitable for is wide.

According to one aspect of the application, a spray arm is provided, the spray arm comprises a shell and a water inlet pipe, the shell forms a water passing cavity, the shell is provided with a water inlet and a plurality of spray holes, the water inlet pipe is connected with the water inlet, water flow enters the water passing cavity from the water inlet pipe through the water inlet and then is sprayed out from the spray holes,

the wall part of the water inlet pipe is provided with at least one first air inlet hole so that a water inlet cavity formed by the water inlet pipe is communicated with the outside;

the spray arm further comprises an air inlet part and a switch assembly, the first air inlet hole is opened by the air inlet part at the air inlet position, and after the switch assembly is rotated to unlock the air inlet part, the switch assembly is lifted or pressed to drive the air inlet part to move to the blocking position so as to close the first air inlet hole.

Optionally, the air inlet part at the air inlet position is locked in the water inlet cavity, the side wall of the air inlet part is arranged in a manner of being attached to the inner wall of the water inlet pipe, water flows into the water inlet pipe and then flows through the inner cavity of the air inlet part to the water inlet, and the side wall of the air inlet part is provided with a second air inlet hole communicated with the first air inlet hole;

after the switch assembly is rotated to unlock the air inlet piece, the switch assembly drives the air inlet piece to ascend to a blocking position, so that the side wall of the air inlet piece blocks the first air inlet hole.

Optionally, the side wall of the air inlet piece comprises an upper air inlet section and a lower air blocking section, the upper air inlet section is annular, and the second air inlet hole is formed in the upper air inlet section;

the lower air blocking section comprises a locking structure, the locking structure comprises a blocking rib and a locking rib connected with the blocking rib, the blocking rib is arranged below the second air inlet hole and extends downwards, and the air inlet piece and the water inlet pipe are coaxial; the locking rib is arranged along the horizontal direction, and the inner side wall of the water inlet pipe is provided with a clamping part matched with the locking rib;

and rotating the switch assembly along a first direction to separate the locking rib from the clamping part, so that the switch assembly drives the air inlet part to ascend to a locking structure to block the first air inlet hole, wherein the bottom of the upper air inlet section at the blocking position is higher than the bottom surface of the water passing cavity, or the top of the upper air inlet section at the blocking position is lower than the top surface of the water passing cavity.

Optionally, one end of the locking rib is connected to the bottom of the blocking rib, and the locking structure is L-shaped; the clamping part is arranged to be an L-shaped limiting groove matched with the locking structure, and the width of the longitudinal part of the L-shaped limiting groove is larger than that of the locking structure; and/or

The lateral wall of the air inlet part is provided with a reducing structure, and the second air inlet hole is arranged at the downstream of the reducing structure.

Optionally, a switch mounting opening is formed in the top of the shell above the water inlet;

the switch assembly comprises a switch button and a reset piece, the switch button is mounted at the switch mounting opening, a connecting part of the switch button and the air inlet piece penetrates through the water passing cavity, the connecting part comprises a water passing channel, and the reset piece is arranged between the switch button and the inner side wall of the bottom of the shell;

the switch button is pressed and drives the air inlet piece to reach the height of an air inlet position, and the switch button is rotated along a first direction to enable the air inlet piece to reach the air inlet position so as to lock the air inlet piece; and rotating the switch knob along a second direction opposite to the first direction to unlock the air inlet part, wherein the reset part drives the switch knob to ascend to a blocking position.

Optionally, the piece that resets is the spring structure, and the position of admitting air the piece cover that resets is established outside connecting portion, the bottom of switch button and/or casing bottom inside wall sets up the constant head tank that resets, the piece card that resets is established in the constant head tank that resets.

Optionally, the bottom of switch knob sets up the constant head tank that resets, the switch knob is bottom open-ended tubular structure, switch knob lateral wall bottom forms inside sunken heavy platform structure, heavy platform structure forms the constant head tank that resets.

Optionally, the switch assembly further comprises a fixing ring connected to the top wall of the housing, the fixing ring being disposed around the switch mounting opening;

the bottom of the outer side of the switch button is provided with an outward flanging structure, and the outward flanging structure is matched with the inward flanging structure at the top of the fixing ring to prevent the switch button from falling out of the shell.

Optionally, a limit strip is arranged on the side wall of the switch knob along the lifting direction of the switch knob, and the inward flanging structure is provided with a limit opening matched with the limit strip;

the limiting opening of the air inlet position is arranged above the limiting strip, and after the switch assembly is rotated to unlock the air inlet piece, the air inlet piece rises and the limiting strip rises along the limiting opening.

Optionally, the connecting portion includes a plurality of connecting ribs, and the water passage is formed between the connecting ribs.

The utility model discloses in the aperture size of first inlet port and second inlet port and the cooperation of the rivers of dish washer can take place the venturi effect and make the air get into the rivers of inlet tube, and can not produce the condition that the water in the inlet tube flows from first inlet port.

The utility model discloses beneficial effect that can produce includes but not limited to:

1. the utility model provides a spray arm, through the setting of first inlet port on the inlet tube, and the rotatory lift through switch module drives the air inlet and removes, thereby realized opening or closing of first inlet port, when opening of first inlet port, the water rapid flow in the inlet tube makes the downthehole negative pressure that produces of first inlet port, and then outside air enters into and forms a large amount of bubbles in the rivers, make the density of rivers reduce, thereby reduced the impact force that rivers erupt from spraying the hole, can be used to wash the material and lighter tableware and softer fruit vegetables, the cleaning performance is good, wide application scope.

2. The spray arm provided by the utility model is matched with the clamping part on the air inlet pipe through the locking structure on the air inlet part so as to lock the air inlet position; and the setting of the blocking rib on the locking structure can be used for closing the first air inlet, and can also be used for enabling water flow to enter the water passing cavity through the gap between the blocking ribs when the blocking rib is positioned in the water passing cavity, so that the air inlet part is prevented from blocking the water flow to enter the water passing cavity from the water inlet in the setting mode, and the water inlet resistance is small.

3. The utility model provides a spray arm, through the rotation of switch button among the switch module, and reset the piece setting and be crossing the lift of water intracavity and drive switch button for opening or closing of the first inlet port of air inlet part, this simple structure, it is small, convenient operation, safe and reliable.

4. The utility model provides a spray arm resets the setting of constant head tank through the toggle button bottom for the constant head tank that should reset is used for the location to reset the piece at fixed compression or resume between toggle button and casing bottom, and the constant head tank that should reset prevents to reset with the fixed piece that resets and rocks or break away from the casing.

5. The utility model provides a spray arm, to the cooperation of flanging structure outside on inwards flanging structure and the switch button through the stationary collar, avoided the switch button to deviate from the casing and influence the use.

6. The utility model provides a spray arm through spacing open-ended setting on the stationary ring for spacing is followed spacing opening rises, and air inlet member can only rise or descend at spacing opening part, and can not rotate, avoids air inlet member's rotation and makes the latched position of locking muscle change, leads to the uncertain of position of unblanking and unblock position to make to be suitable for inconveniently.

7. The utility model provides a spray arm, switch button bottom and air inlet piece top are passed through the splice bar and are connected for the rivers of inlet tube enter into the water cavity from the water channel behind the inner chamber of air inlet piece, and this mode of setting up has avoided the junction can hinder rivers from the water inlet entering into the water cavity, and the resistance of intaking is little.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is an exploded schematic view of a spray arm according to the present invention;

fig. 2 is an assembly schematic view of a switch knob and a water inlet member in the spray arm according to the present invention;

fig. 3 is a schematic view of a longitudinal cutting structure of the spray arm at the air inlet position according to the present invention;

fig. 4 is a schematic view of a section structure of the spray arm of the present invention after rotating at the air inlet position;

fig. 5 is a schematic view of a longitudinal cutting structure of the spray arm in the plugging position according to the present invention;

fig. 6 is a schematic view of an assembly structure of the spray arm according to the present invention;

fig. 7 is a schematic structural view of the spray arm according to the present invention after rotation.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 and 4-7, the present invention provides a spray arm, which includes a housing 1 and a water inlet pipe 2 forming a water passing cavity 11, the housing 1 is provided with a water inlet 12 and a plurality of spray holes 13, the water inlet pipe 2 is connected with the water inlet 12, water flows from the water inlet pipe 2 through the water inlet 12 into the water passing cavity 11 and then is sprayed out from the spray holes 13, the wall of the water inlet pipe 2 is provided with at least one first air inlet 21, so that the water passing cavity formed by the water inlet pipe 2 is communicated with the outside; the spray arm further comprises an air inlet part 3 and a switch component 4, the first air inlet hole 21 is opened in the air inlet part 3 at the air inlet position, and after the switch component 4 is rotated to unlock the air inlet part 3, the switch component 4 is lifted or pressed to drive the air inlet part 3 to move to the blocking position so as to close the first air inlet hole 21. Through the setting of first inlet port 21 on inlet tube 2, first inlet port 21 is opened at the air inlet 3 of the position of admitting air, takes place the venturi effect, and makes air inlet 3 close first inlet port 21 through rotatory lift switch subassembly 4 to realized opening of first inlet port 21 and made outside air get into or close and make outside air can not get into. When opening of first inlet port, the water in the inlet tube flows fast and makes and produces the negative pressure in the first inlet port to produce adsorption and lead to the flow of air, outside air dissolves and forms a large amount of bubbles in the rivers of flowing through inlet tube 2 and water inlet member 3, makes the density of rivers reduce, thereby has reduced rivers from the impact force that sprays 13 sprays, can be used to wash the material and lighter tableware and softer fruit vegetables, and the cleaning performance is better, and application scope is wide.

As an implementation mode, the air inlet part 3 at the air inlet position is locked in the water inlet cavity, the side wall of the air inlet part 3 is arranged in a way of being attached to the inner wall of the water inlet pipe 2, water flows through the inner cavity of the air inlet part 3 to the water inlet after entering the water inlet pipe 2, and the side wall of the air inlet part 3 is provided with a second air inlet 3111 communicated with the first air inlet 21; after the switch component 4 is rotated to unlock the air inlet 3, the switch component 4 drives the air inlet 3 to ascend to the blocking position, so that the side wall of the air inlet 3 blocks the first air inlet 21. In the coincidence of the first inlet port 21 and the second inlet port 3111 of air inlet position, outside air is constantly inhaled through first inlet port 21 and second inlet port 3111, has guaranteed that rivers can not flow out through first inlet port 21 and second inlet port 3111 after entering inlet tube 2.

Referring to fig. 2 and 3, as an embodiment, the sidewall of the air inlet 3 includes an upper air inlet section 31 and a lower air blocking section 32, the upper air inlet section 31 is annular, and the second air inlet 3111 is opened in the upper air inlet section 31; the lower air blocking section 32 comprises a locking structure, the locking structure comprises a blocking rib 321 and a locking rib 322 connected with the blocking rib, the blocking rib 321 is arranged below the second air inlet 3111 and extends downwards, and the air inlet part 3 and the water inlet pipe 2 are coaxial; the locking rib 322 is arranged along the horizontal direction, and the inner side wall of the water inlet pipe 2 is provided with a clamping part matched with the locking rib 322; rotating switch module 4 along first direction then locking muscle 322 and the separation of screens portion for switch module 4 drives air inlet 3 and rises to the locking structure and shutoff first inlet port 21, the bottom of the upper portion air inlet section 31 of shutoff position is higher than the bottom surface of crossing water cavity 11, or the top of the upper portion air inlet section 31 of shutoff position is less than the top surface of crossing water cavity 11, so that the inner chamber of air inlet 3 and crossing water cavity 11 are the intercommunication, guarantee that rivers enter into water inlet pipe 2 after the inner chamber that flows through air inlet 3 enters into crossing water cavity 11, then spout from different spray holes 13. The air inlet position is locked by the arrangement of a locking structure; the setting of fender muscle 321 in the locking structure both can be used for closing first inlet port 21, also can be when keeping off muscle 321 and being located the water cavity for rivers get into water cavity 11 through keeping off the space between the muscle 321, and this mode of setting has avoided air inlet 3 can hinder rivers from water inlet 12 entering water cavity 11 in, and the resistance of intaking is little.

As a preferred embodiment, one end of the locking rib 322 is connected to the bottom of the blocking rib 321, and the locking structure is L-shaped; the clamping part is arranged to be an L-shaped limiting groove 22 matched with the locking structure, the width of the longitudinal part of the L-shaped limiting groove 22 is larger than that of the locking structure, so that the locking structure can ascend and descend along the longitudinal part of the L-shaped limiting groove 22, the locking matching structure is simple, processing is convenient, the occupied size is small, and operation is convenient.

Referring to fig. 2, as a preferred embodiment, a diameter-reduced structure 311 is provided on a side wall of the air intake member 3, and a second air intake hole 3111 is provided downstream of the diameter-reduced structure 311. When water flows into the water inlet pipe 2 and then flows through the air inlet part 3, the cross-sectional area of the reducing structure 311 is reduced, so that the water speed of the water flow is improved, the suction of external air is enhanced, and the impact force of the water flow ejected from the spraying holes 13 is reduced.

Referring to fig. 3-5, as an embodiment, a switch mounting opening is formed at the top of the housing 1 above the water inlet 12; the switch assembly 4 comprises a switch button 41 and a reset piece 42, the switch button 41 is installed at a switch installation port, a connecting part of the switch button 41 and the air inlet piece 3 penetrates through the water passing cavity 11, the connecting part comprises a water passing channel, and the reset piece 42 is arranged between the switch button 41 and the inner side wall of the bottom of the shell 1; the switch button 41 is pressed and drives the air inlet part 3 to reach the height of the air inlet position, and the switch button 41 is rotated along the first direction to enable the air inlet part 3 to reach the air inlet position so as to lock the air inlet part 3; when the switch knob 41 is rotated in a second direction opposite to the first direction, the air inlet member 3 is unlocked, and the reset member 42 drives the switch knob 41 to rise to the blocking position. Through the rotation of switch knob 41, realize the locking of air inlet 3, first inlet port 21 and the coincidence of second inlet port 3111, and make air inlet 3 rise through piece 42 that resets for air inlet 3 shutoff first inlet port 21, thereby realized opening or closing of first inlet port 21, this simple structure, convenient operation.

As an embodiment, reset 42 is the spring structure, and the piece 42 that resets of position of admitting air is established outside connecting portion, and the bottom of switch button 41 and/or the casing bottom inside wall set up the constant head tank that resets, and reset 42 card is established in the constant head tank that resets for reset 42 compresses or resumes between switch button 41 and casing 1 bottom.

As an embodiment, the bottom of the switch knob 41 is provided with a reset positioning slot 411, the switch knob 41 is a tubular structure with an opening at the bottom, the bottom of the sidewall of the switch knob 41 forms an inward-recessed sinking platform structure, the sinking platform structure forms the reset positioning slot 411, and the reset positioning slot 411 is used for positioning the reset piece 42 to prevent the reset piece 42 from shaking or separating from the housing 1.

As an embodiment, the switch assembly 4 further includes a fixing ring 43 connected to the top wall of the housing 1, the fixing ring 43 being disposed around the switch mounting opening; the outward flange structure 412 is disposed at the bottom of the switch button 41, and the outward flange structure cooperates with the inward flange structure 431 at the top of the fixing ring 43 to prevent the switch button 41 from falling out of the housing 1. The inward flanging structure 431 on the fixing ring 43 is matched with the outward flanging structure 412 on the switch knob 41, so that the switch knob 41 is prevented from falling off the shell 1 to influence the use.

Referring to fig. 1, 3 and 5, as an embodiment, a limit strip 413 is disposed on a side wall of the switch knob 41 along a lifting direction of the switch knob, and a limit opening 4311 matched with the limit strip 413 is disposed on the inward flanging structure 431; the spacing opening 4311 of the air inlet position is arranged above the spacing strip 413, and after the rotary switch assembly unlocks the air inlet part 3, the air inlet part 3 rises and the spacing strip 413 rises along the spacing opening 4311, so that the air inlet part 3 can only rise or fall at the spacing opening 4311 and cannot rotate, the locking position of the locking rib is prevented from being changed, and the unlocking position are not determined so that the air inlet part is applicable conveniently.

Referring to fig. 1-5, as one embodiment, the connecting portion includes a plurality of connecting ribs 5, and the connecting ribs 5 form a water passage therebetween. The setting of splice bar 5 guarantees that the space between the rivers accessible splice bar in the inlet tube 2 enters into water cavity 11, and this mode of setting has avoided the junction can hinder rivers from the water inlet entering into water cavity, and the resistance of intaking is little.

As an embodiment, a use of a spray arm in a dishwasher is provided. The spray arm in this embodiment is rotatable installs in the inner bag of dish washer, places tableware or fruit vegetables etc. in the inner bag, and dish washer is still including installing the water pump in the outer bottom of inner bag, and the inner bag bottom sets up the basin, water pump and basin intercommunication. When the dish washer works, water is supplied to the water tank by the water tank, the water in the water tank is pumped into the water passing cavity 11 of the spray arm by the water pump through the water inlet pipe 2 through the water inlet 12, and then is sprayed out from the spray holes 13 on the spray arm shell 1 to wash tableware. The washing water for washing the tableware can also flow back into the water tank and then enters the spraying arm through the water pump for cyclic washing and utilization, so that the water is saved. Because this application sprays and sets up first inlet port 21 on the intake pipe 2 of arm, and can realize opening or closing of first inlet port 21 through switch module 4 and air intake assembly 3, when first inlet port 21 was opened, can make outside air get into to reduce rivers from the impact force that sprays hole 13 injection.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above are merely examples of the present invention, and are not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a spray arm, spray arm is including forming the casing and the inlet tube in water cavity, the casing sets up water inlet and a plurality of hole that sprays, advance water piping connection the water inlet, rivers get into from the inlet tube through the water inlet after the water cavity from spraying the hole blowout, its characterized in that:

the wall part of the water inlet pipe is provided with at least one first air inlet hole so that a water inlet cavity formed by the water inlet pipe is communicated with the outside;

the spray arm further comprises an air inlet part and a switch assembly, the first air inlet hole is opened by the air inlet part at the air inlet position, and after the switch assembly is rotated to unlock the air inlet part, the switch assembly is lifted or pressed to drive the air inlet part to move to the blocking position so as to close the first air inlet hole.

2. The spray arm according to claim 1, wherein the air inlet member at an air inlet position is locked in the water inlet cavity, a side wall of the air inlet member is arranged to be attached to an inner wall of the water inlet pipe, water flows through an inner cavity of the air inlet member to the water inlet after entering the water inlet pipe, and a second air inlet hole communicated with the first air inlet hole is formed in the side wall of the air inlet member;

after the switch assembly is rotated to unlock the air inlet piece, the switch assembly drives the air inlet piece to ascend to a blocking position, so that the side wall of the air inlet piece blocks the first air inlet hole.

3. The spray arm according to claim 2, wherein the side wall of the air inlet comprises an upper air inlet section and a lower air blocking section, the upper air inlet section is annular, and the second air inlet hole is formed in the upper air inlet section;

the lower air blocking section comprises a locking structure, the locking structure comprises a blocking rib and a locking rib connected with the blocking rib, the blocking rib is arranged below the second air inlet hole and extends downwards, and the air inlet piece and the water inlet pipe are coaxial; the locking rib is arranged along the horizontal direction, and the inner side wall of the water inlet pipe is provided with a clamping part matched with the locking rib;

and rotating the switch assembly along a first direction to separate the locking rib from the clamping part, so that the switch assembly drives the air inlet part to ascend to a locking structure to block the first air inlet hole, wherein the bottom of the upper air inlet section at the blocking position is higher than the bottom surface of the water passing cavity, or the top of the upper air inlet section at the blocking position is lower than the top surface of the water passing cavity.

4. The spray arm of claim 3 wherein said locking rib has one end attached to the bottom of said retaining rib, said locking structure being L-shaped; the clamping part is arranged to be an L-shaped limiting groove matched with the locking structure, and the width of the longitudinal part of the L-shaped limiting groove is larger than that of the locking structure; and/or

The lateral wall of the air inlet part is provided with a reducing structure, and the second air inlet hole is arranged at the downstream of the reducing structure.

5. The spray arm according to any one of claims 1 to 4, wherein a switch mounting opening is formed in the top of the housing above the water inlet;

the switch assembly comprises a switch button and a reset piece, the switch button is mounted at the switch mounting opening, a connecting part of the switch button and the air inlet piece penetrates through the water passing cavity, the connecting part comprises a water passing channel, and the reset piece is arranged between the switch button and the inner side wall of the bottom of the shell;

the switch button is pressed and drives the air inlet piece to reach the height of an air inlet position, and the switch button is rotated along a first direction to enable the air inlet piece to reach the air inlet position so as to lock the air inlet piece; and rotating the switch knob along a second direction opposite to the first direction to unlock the air inlet part, wherein the reset part drives the switch knob to ascend to a blocking position.

6. The spray arm according to claim 5, wherein the reset member is a spring structure, the reset member at the air inlet position is sleeved outside the connecting portion, a reset positioning groove is formed in the bottom of the switch knob and/or the inner side wall of the bottom of the housing, and the reset member is clamped in the reset positioning groove.

7. The spray arm of claim 6, wherein the bottom of the switch knob is provided with a reset positioning groove, the switch knob is of a cylindrical structure with an open bottom, and the bottom of the side wall of the switch knob is provided with an inwardly recessed platform structure which forms the reset positioning groove.

8. The spray arm of claim 5 wherein the switch assembly further comprises a retaining ring attached to the top wall of the housing, the retaining ring disposed about the switch mounting opening;

the bottom of the outer side of the switch button is provided with an outward flanging structure, and the outward flanging structure is matched with the inward flanging structure at the top of the fixing ring to prevent the switch button from falling out of the shell.

9. The spray arm according to claim 8, wherein the side wall of the switch knob is provided with a limit strip along the lifting direction of the switch knob, and the inward flanging structure is provided with a limit opening matched with the limit strip;

the limiting opening of the air inlet position is arranged above the limiting strip, and after the switch assembly is rotated to unlock the air inlet piece, the air inlet piece rises and the limiting strip rises along the limiting opening.

10. The spray arm of claim 5 wherein said attachment portion includes a plurality of attachment ribs, said attachment ribs defining said water passage therebetween.

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