CN218500678U - Spray arm structure and dish washer - Google Patents

Abstract

The utility model relates to the technical field of household appliances, a spray arm structure and dish washer are specifically disclosed. The spray arm structure comprises a water inlet part and at least two sub spray arms; the water inlet part can be communicated with the washing pump; the circumference of the sub-spray arm ring water inlet part is uniformly arranged, a liquid flow channel is arranged in each sub-spray arm, the liquid flow channel is communicated with the water inlet part, a plurality of spraying holes communicated with the liquid flow channel are formed in the surface of each sub-spray arm, and the spraying holes are distributed along the axis of the sub-spray arm. This spray arm structure is through setting up the overall arrangement of branch spray arm such as, can increase the number of times of washing in the cycle, and the cooperation helps reducing the pressure loss to the injecing of seting up the position of spraying the hole, and the balanced water pressure that sprays the hole increases the play water dynamics that sprays the hole, and then can promote the washing efficiency of spray arm structure and spray the effect.

Description

Spray arm structure and dish washer

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to a spray arm structure and dish washer.

Background

As the standard of living increases, more and more users choose to use the dishwasher. The water used in the washing cycle of the dish washer is circulating water, the circulating water enters the washing pump through the bottom of the water cup, the washing pump heats and pressurizes the water and then sends the water to the spraying system, the spraying arm is a core part of the dish washer, the bottom of the spraying arm is provided with a water inlet, uniform spraying holes are formed in the structure of the spraying arm according to the washing requirement, and the water discharged from the spraying holes is used for washing and cleaning the tableware on the shelf.

Most of spray arms in the prior art are linear spray arms, and the spray arms are used for washing tableware in the same washing period, so that the tableware is washed less frequently, the washing efficiency is lower, and the cleaning is relatively poor. Meanwhile, the existing spray arm has more dead angles during spraying, the spraying hydraulic loss is large, and the water outlet force is insufficient, so that the collection capacity and the washing effect of the spray arm on residues are poor, and the use experience of a user is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a spray arm structure and dish washer has increased the washing number of times of spray arm structure in single cycle, and then promotes the washing efficiency of spray arm structure and sprays the effect.

To achieve the purpose, the utility model adopts the following technical proposal:

a spray arm structure comprises a water inlet part and at least two sub spray arms; the water inlet part can be communicated with the washing pump; the sub-spray arms are annularly and uniformly arranged in the circumferential direction of the water inlet portion, each sub-spray arm is internally provided with a liquid flow channel, the liquid flow channels are communicated with the water inlet portion, the surface of each sub-spray arm is provided with a plurality of spray holes communicated with the liquid flow channels, and the spray holes are distributed along the axis of the corresponding sub-spray arm.

In a preferred embodiment of the nozzle arm structure, the cross-sectional area of the liquid flow path gradually decreases in a direction from the water inlet portion to the tip of the sub-nozzle arm.

As the preferable technical scheme of the spray arm structure, two reinforcing ribs are arranged in the sub-spray arm, the reinforcing ribs and the inner wall of the sub-spray arm enclose to form a liquid flow channel, and the distance between the two reinforcing ribs is reduced along the flowing direction of the washing liquid.

In a preferred embodiment of the spray arm structure, the lower inner wall of the sub-spray arm gradually inclines toward the upper inner wall of the sub-spray arm in the flowing direction of the washing liquid.

As a preferable technical scheme of the spray arm structure, the cross section of the liquid flow channel is conical, and the spray hole is formed in the small end of the conical shape.

As a preferable technical scheme of the spray arm structure, the spray arm structure further comprises a spray arm hydrophobic shell, and the spray arm hydrophobic shell at least partially covers the surface of the sub-spray arm.

As a preferable technical solution of the spray arm structure, the upper surface of the sub-spray arm includes two side inclined planes, the two side inclined planes are symmetrically arranged on two sides of the upper surface, and the height of the side inclined planes gradually decreases along a direction away from the sub-spray arm.

As a preferable technical scheme of the spray arm structure, the upper surface of the sub-spray arm further comprises a top plane, the two side inclined planes are symmetrically connected to two sides of the top plane, and the spray arm hydrophobic shell is attached to the upper surface.

As a preferable technical scheme of the spray arm structure, the spray arm hydrophobic shell is made of a metal sheet.

As a preferred technical scheme of the spray arm structure, the lower surface of one sub-spray arm is provided with a slag collecting hole communicated with the liquid flow channel, and the slag collecting hole extends from top to bottom towards a direction close to a central rotating shaft of the spray arm structure.

The dish washing machine comprises a box body, a washing pump and the spraying arm structure, wherein the spraying arm structure is rotatably arranged in the box body, and a water inlet part is communicated with the washing pump.

The utility model has the advantages that:

this spray arm structure is through the design of the central pivot interval equipartition with at least two sub spray arm ring spray arm structures, make sub spray arm can interval equipartition in the portion of intaking around, the overall arrangement of sub spray arm has been optimized in the above improvement, help increasing the washing number of times of spray arm structure in single cycle, through the design that a plurality of holes of spraying were arranged along the axis of the sub spray arm of place, the restriction of seting up the position to spraying the hole has been realized, above design helps reducing the pressure loss of washing liquid at the mobile in-process, the water pressure of balanced spray hole department, reduce the dead angle when spraying, the increase sprays the play water dynamics in hole, and then promote the washing efficiency of spray arm structure and spray the effect.

Drawings

Fig. 1 is a schematic structural diagram of a spray arm structure provided by an embodiment of the present invention;

fig. 2 is an exploded view of a spray arm structure provided by an embodiment of the present invention;

FIG. 3 is a schematic structural view of a spray arm hydrophobic shell provided by the embodiment of the present invention;

fig. 4 is a partial top view of a sub-spray arm provided by an embodiment of the present invention;

fig. 5 is a partial bottom view of the sub-spray arm provided by the embodiment of the present invention;

fig. 6 is a partially exploded view of a spray arm structure provided by an embodiment of the present invention;

fig. 7 is a cross-sectional view of a spray arm structure provided by an embodiment of the present invention;

fig. 8 is a top view of a spray arm structure provided by an embodiment of the present invention;

fig. 9 is a cross-sectional view of a sub-spray arm according to an embodiment of the present invention;

fig. 10 is a cross-sectional view of another sub-spray arm according to an embodiment of the present invention.

In the figure:

100. a sub-spray arm; 101. a lower housing; 102. an upper housing; 103. a step surface; 104. reinforcing ribs; 105. a top plane; 106. a side bevel; 110. spraying arm hydrophobic shell; 111. a first bending claw; 112. avoiding the through hole; 119. folding the sheet; 120. a liquid flow passage; 130. spraying holes; 140. a slag collecting hole; 190. a limiting plate;

200. a water inlet part; 210. a main body hydrophobic shell; 211. a second bending claw; 220. a water inlet pipe; 221. a spray arm positioning part; 230. a recess structure; 240. a wall surface; 250. and connecting the curved surfaces.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 9, the present embodiment provides a spray arm structure including a water inlet part 200 and at least two sub-spray arms 100; the water inlet part 200 can be communicated with the washing pump; the sub-spray arms 100 are uniformly arranged around the circumference of the water inlet part 200, a liquid flow channel 120 is arranged in each sub-spray arm 100, the liquid flow channel 120 is communicated with the water inlet part 200, a plurality of spray holes 130 communicated with the liquid flow channel 120 are formed in the surface of each sub-spray arm 100, and the spray holes 130 are arranged along the axis of the corresponding sub-spray arm 100.

This spray arm structure is through the design of the central pivot interval equipartition that spouts the arm structure with at least two sub-spray arms 100 ring, make sub-spray arms 100 can interval equipartition around the portion 200 of intaking, the overall arrangement of sub-spray arms 100 has been optimized in the above improvement, help increasing the washing number of times of spray arm structure in single cycle, through the design that a plurality of holes 130 of spraying were arranged along the axis of the sub-spray arm 100 of place, realized offering the injecture of position to spraying hole 130, the above design helps reducing the pressure loss of washing liquid at the flow in-process, the balanced pressure of water that sprays hole 130 department, reduce the dead angle when spraying, the increase sprays the water dynamics of hole 130, and then promote the washing efficiency and the spraying effect of spray arm structure.

Illustratively, the sub-spray arms 100 are provided in three. The design that the central rotating shafts of the annular spraying arm structures of the three sub-spraying arms 100 are uniformly distributed at intervals enables the three sub-spraying arms 100 to be distributed on the water inlet part 200 in a three-way equal division manner under the condition that the central shaft angle is 120 degrees.

In this embodiment, the connection line between any two spraying holes 130 is parallel to the sub-spraying arm 100 and is located in the plane formed by the sub-spraying arm 100 and the central rotation axis of the spraying arm structure. The above design makes the spraying position of each washing liquid be located directly above or below the sub-spray arm 100, which helps to reduce the pressure loss of the washing liquid in the flowing process. Specifically, all the spray holes 130 are opened at the upper surface of the sub spray arm 100.

Preferably, the sub-spray arms 100 are perpendicular to the central rotation axis of the spray arm structure. Above design has still optimized the orbit that washing liquid flows when having reduced spray arm structure occupation space, has further reduced hydraulic loss from this, helps promoting the effect of washing.

In this embodiment, the bottom end of the water inlet portion 200 is provided with a water inlet pipe 220 for communicating with the washing pump, the water inlet pipe 220 is rotatably connected to the washing pump, and the axis of the water inlet pipe 220 coincides with the central rotating shaft of the spray arm structure. Through the design that sets up the axis of inlet tube 220 and the coincidence of the central pivot of spray arm structure, realized the configuration optimization to portion 200 of intaking, through the mode that inlet tube 220 and outside washing pump rotate to be connected, can realize simultaneously supplying water to inlet tube 220 and with the design of portion 200 rotation connection of intaking, simplified the structure of portion 200 of intaking from this by a wide margin, reduced the occupation space of spray arm structure.

In this embodiment, the openings of the spraying holes 130 are square or circular, and the distances between the spraying holes 130 on the same sub-spraying arm 100 are the same, so that the design ensures no dead angle in the washing area of the spraying arm structure and stable water outlet pressure.

In this embodiment, each liquid flow path 120 extends along the axis of the sub-spray arm 100. An included angle is formed between the extending direction of the spraying holes 130 and the extending direction of the liquid channel 120, and the orientation of each spraying hole 130 is different. Generally, the extending direction of the liquid flow channel 120 is a horizontal direction, and the extending direction of the spray holes 130 is an inclined direction, that is, the included angle between the extending direction of the spray holes 130 and the extending direction of the liquid flow channel 120 is not a right angle, so that the pressure loss is greatly reduced in the process that the cleaning solution directly enters the spray holes 130 from the liquid flow channel 120.

In this embodiment, the guide part with the function of improving the pressure of the outlet water is arranged between the hollow cavity and the water inlet pipe 220, so that the problem of pressure loss in the process of directly entering the hollow cavity from the water inlet pipe 220 is solved, the water pressure and the water flow speed at the hollow cavity are effectively improved, and the tableware can be cleaned more thoroughly.

The concrete structure of water conservancy diversion portion is not limited, can promote hydraulic structure and device all can in the prior art. Preferably, the guide portion includes a concave structure 230 provided on an inner wall surface of the water inlet portion 200, and the water inlet pipe 220 is opened in the concave structure 230. The recess structure 230 may be understood as a "pit" dug in the inner wall surface of the water inlet portion 200 in the direction of the outlet water, into which the washing liquid in the external washing apparatus enters before entering the water inlet pipe 220. The hollow cavity and the pit have a certain height drop, so that turbulent flow can be generated in the process of entering the pit, and the turbulent flow washing liquid flows into the hollow cavity, thereby being beneficial to increasing the pressure of outlet water.

When the recess 230 is a dish-shaped "pit", the hollow cavity smoothly transitions to the edge of the "pit", and the washing liquid in the water inlet pipe 220 slides into the dish-shaped "pit" at a relatively small flow rate, so that the generated turbulence is small and the lifting effect on the water pressure is poor. In order to obtain a turbulent flow which is more stable and can increase the water pressure, a wall surface 240 having a predetermined height is formed between the concave structure 230 and the inner wall surface of the water inlet portion 200. The wall 240 structure increases the fall between the hollow cavity and the "pit", and the washing liquid in the hollow cavity generates a large displacement when entering the concave structure 230, thereby forming an obvious turbulent flow, improving the water flow speed, and further improving the water pressure.

The specific height of the wall 240 is not limited, and may be designed according to the size of the water inlet part 200, the material of the water inlet part 200, the use requirement of the dishwasher, etc., so that the washing liquid may generate a sufficiently large turbulence.

The wall surface 240 is substantially perpendicular to the inner wall surface of the water inlet portion 200, and the wall surface 240 is also substantially perpendicular to the bottom surface of the concave structure 230, so that a sufficient difference in height is ensured between the bottom surface of the concave structure 230 and the inner wall surface of the water inlet portion 200, and a larger turbulent flow can be generated.

The wall surface 240 is in curved surface transition connection with the inner wall surface of the water inlet part 200, and the wall surface 240 is in curved surface transition connection with the concave part structure 230. Smooth transition between two faces can be realized to the curved surface, compares in the structure that has the edges and corners between two faces, and smooth transition's curved surface can reduce the resistance to the fluid, avoids the velocity of flow loss of washing liquid too much, helps improving the delivery pressure of inlet tube 220 department.

In order to increase the height of the sprayed water and control the shape of the discharged water, the water inlet pipe 220 is selected to be a tubular structure, i.e., a nozzle is arranged at the water inlet pipe 220. Therefore, there is also a transition between the inlet pipe 220 and the recess structure 230. In order to avoid excessive loss of the flow rate of the washing liquid, a connecting curved surface 250 is arranged between the water inlet pipe 220 and the concave structure 230, the connecting curved surface 250 enables smooth transition between the water inlet pipe 220 and the concave structure 230, the washing liquid can flow into the concave structure 230 from the water inlet pipe 220 more smoothly, and the resistance of the connecting curved surface 250 to the washing liquid is small. The specific size (e.g., arc radius) of the curved connecting surface 250 is not limited, and may be designed according to the parameters such as the aperture of the water inlet pipe 220.

The specific shape of the flow guide part is not limited, and the flow guide part only has the function of improving the pressure of the water flow. Preferably, the cross-section of the flow guide is circular, which better generates turbulence. The "cross section" herein refers to a section in a direction perpendicular to an axis of an inner wall surface of the water inlet portion 200 where the guide portion is located, and is substantially parallel to the inner wall surface of the water inlet portion 200 where the guide portion is located when the inner wall surface of the water inlet portion 200 is a plane or substantially a plane.

When the shape of the inner wall surface of the water inlet part 200 is limited, the cross section of the flow guide part can also be rectangular, and turbulence can be generated to improve the water flow pressure. However, the flow guide portion having a rectangular cross section has a poor effect of generating turbulence compared to a flow guide portion having a circular cross section, and therefore the cross section of the flow guide portion is preferably circular.

Preferably, a hollow cavity is formed in the water inlet portion 200, the bottom of the hollow cavity is communicated with the water inlet pipe 220, and the sides of the hollow cavity are respectively communicated with the three liquid flow passages 120.

Specifically, two spray arm positioning portions 221 are further fixedly connected to the bottom of the water inlet portion 200, and the spray arm structure is positioned by the external washing equipment by using the spray arm positioning portions 221.

In this embodiment, the material of the sub-spray arm 100 is plastic, the sub-spray arm 100 is formed by splicing a lower shell 101 and an upper shell 102, the end of the sub-spray arm 100 can be designed into a circular arc shape, and the wind resistance is smaller when the spray arm assembly rotates.

In the present embodiment, the cross-sectional area of the liquid flow path 120 is gradually reduced in a direction from the water inlet portion 200 to the end of the sub-spray arm 100. The gradually reduced design of the liquid flow channel 120 is helpful to further reduce the pressure loss of the washing liquid in the flowing process, so that the water outlet strength of the spraying holes 130 is further increased, and the washing efficiency and the spraying effect of the spraying arm structure are further improved.

Furthermore, two reinforcing ribs 104 are arranged in the sub-spray arm 100, the two reinforcing ribs 104 and the inner wall of the sub-spray arm 100 enclose to form a liquid flow channel 120, and the distance between the two reinforcing ribs 104 decreases along the flowing direction of the washing liquid. Under the condition that the sub-spray arms 100 are ensured to have enough width, the liquid flow channels 120 can be made to be narrow, the loss of water pressure can be further reduced, water can be discharged as soon as possible after water enters, the water pressure and the flow rate at the spray holes 130 can both meet the use requirements, the water pressure loss is reduced by drawing the cross-sectional area of the liquid flow channels 120, and the water discharge pressure can be improved.

Except the liquid flow channel 120 formed by enclosing, the reinforcing ribs 104 vertically arranged in the sub-spray arm 100 can also play a role in increasing the overall strength of the sub-spray arm 100, so that the upper surface or the lower surface of the sub-spray arm 100 is prevented from sinking or collapsing, and the service life of the sub-spray arm 100 is prolonged.

Preferably, the lower inner wall of the sub-spray arm 100 is gradually inclined toward the upper inner wall of the sub-spray arm 100 in the flow direction of the washing liquid. The above design increases the inclination of the liquid flow path 120, so that the liquid flow path 120 is not easy to store water. After the washing action is finished, the washing water flows back to the external device more easily according to the sequence of the liquid flow channel 120, the hollow cavity and the water inlet pipe 220, so that the residual washing liquid is discharged. The above design ensures a dry environment in the sub-spray arm 100, which is helpful to improve the cleanliness of the spray arm structure and the washing equipment using the spray arm structure. Specifically, the angle between the lower inner wall of the sub-spray arm 100 and the upper inner wall of the sub-spray arm 100 is 1 ° to 3 °.

In this embodiment, the cross-sectional shape of the liquid channel 120 is a cone, and the shower holes 130 are opened at the small end of the cone. The design of the conical structure reduces the loss of the water outlet pressure of the washing liquid from the water inlet pipe 220 at the near end to the spraying hole 130 at the far end, thereby ensuring the washing effect of the spraying arm structure.

Preferably, the spray arm structure further comprises a spray arm hydrophobic shell 110, and the spray arm hydrophobic shell 110 at least partially covers the surface of the sub-spray arm 100. The arrangement of the spray arm hydrophobic shell 110 plays roles of decoration and drainage, and the weight of the sub-spray arm 100 is increased, so that the stability of the sub-spray arm 100 during rotation is improved, the risk of shaking the sub-spray arm 100 is reduced, the washing effect of the sub-spray arm 100 is optimized, and meanwhile, the attractiveness of the appearance of the sub-spray arm 100 is improved. Specifically, the spray arm hydrophobic shell 110 partially covers the upper surface of the sub-spray arm 100.

The spray arm hydrophobic shell 110 may be disposed only on a surface of the sub-spray arm 100 on which the spray holes 130 are disposed, the spray arm hydrophobic shell 110 may have a through-hole 112 for passing through the spray holes 130, and the cleaning solution sprayed from the spray holes 130 may substantially only fall on the surface, but may not fall on other surfaces. As long as the spray arm hydrophobic shell 110 is arranged on the surface of the sub-spray arm 100, which is provided with the spray holes 130, the washing liquid dropping on the sub-spray arm 100 can be quickly separated, the accumulated water and the hanging beads on the surface of the sub-spray arm 100 are reduced, the processing is convenient, and the manufacturing cost is low.

In other embodiments of this embodiment, the spray arm hydrophobic shell 110 can also completely cover the outer surface of the sub-spray arm 100, so as to avoid the washing liquid from forming water accumulation and beads on the surface of the sub-spray arm 100, ensure that the washed dishes are not polluted by the water accumulation and beads, and make the drying speed faster.

Further, the spray arm hydrophobic shell 110 is made of a metal sheet. Specifically, the metal sheet is made of stainless steel or aluminum alloy. The metal material is corrosion-resistant and has metallic luster, is favorable for increasing the appearance texture of the sub-spray arm 100, and the metal material is good in hydrophobic effect and strong in heat conductivity, so that water drops are not easy to remain on the sub-spray arm 100 after washing is completed. The metal material has strong shaping ability, can be bent into any shape, and can be applied to the sub-spray arms 100 with various shapes. The metal material can be conveniently punched out of the avoiding through hole 112 without influencing the spraying of the cleaning solution from the spraying hole 130. The design that the spray arm hydrophobic shell 110 selects the sheet material can ensure that the spray arm hydrophobic shell 110 is tightly pasted on the upper surface of the sub-spray arm 100, thereby reducing the risk that the spray arm hydrophobic shell 110 falls off due to accidents and further reducing the space occupied by the sub-spray arm 100.

Preferably, the edge of the spray arm hydrophobic shell 110 is provided with a spray arm flange, and the spray arm flange partially wraps the side surface of the sub-spray arm 100. The installation effect of the spray arm hydrophobic shell 110 on the sub-spray arm 100 is further improved by the arrangement of the spray arm flanging, and the risk of position deviation of the spray arm hydrophobic shell 110 is greatly reduced.

In an embodiment of the present embodiment, a plurality of first bending claws 111 are convexly disposed at intervals on the edge of the nozzle arm flanging, a nozzle arm fastening groove is disposed at the bottom of the sub-nozzle arm 100, the number of the nozzle arm fastening grooves is the same as that of the first bending claws 111, and the first bending claws 111 are in one-to-one correspondence with the first bending claws 111, and after being bent, the first bending claws 111 are matched and fastened in the nozzle arm fastening groove, so that the nozzle arm hydrophobic shell 110 is stably assembled on the sub-nozzle arm 100.

Preferably, the first bending claw 111 is provided with at least one on both sides of the spray arm hydrophobic shell 110. Specifically, the first bending claws 111 are arranged three and uniformly distributed on both sides of the spray arm hydrophobic shell 110.

As shown in fig. 10, in another embodiment of this embodiment, a limiting plate 190 is fixedly connected to the sub-spray arm 100, the limiting plate 190 and the side surface of the sub-spray arm 100 define a spray arm through hole, a plurality of folded pieces 119 are convexly arranged at intervals on the edge of the spray arm flange, the number of the folded pieces 119 is the same as that of the spray arm through holes, the folded pieces 119 are in one-to-one correspondence, and the folded pieces 119 can be inserted into the spray arm through holes and then folded. The above embodiment can better hide the bending trace of the flap 119, and make the overall shape of the sub-spray arm 100 more beautiful.

In other embodiments of this embodiment, the upper surface of the sub-spray arm 100 and the lower plate surface of the spray arm hydrophobic shell 110 are fixed by means of adhesive; or the upper surface of the sub-spray arm 100 is bonded and fixed with the lower plate surface of the spray arm hydrophobic shell 110 by means of hot melting the upper surface of the sub-spray arm 100.

With continued reference to fig. 1-9, in order to improve the stability of the spray arm hydrophobic shell 110, a step surface 103 is provided on the side surface of the sub-spray arm 100, and the edge of the spray arm hydrophobic shell 110 abuts on the step surface 103. The area of the upper surface of the sub-spray arm 100 is relatively large, some unevenness may exist due to problems such as machining precision or structural design, the spray arm hydrophobic shell 110 is difficult to completely attach to the upper surface of the sub-spray arm 100, the connection between the spray arm hydrophobic shell 110 and the sub-spray arm 100 is unstable, and the spray arm hydrophobic shell 110 is easy to shake in the rotation process of the sub-spray arm 100. The area of the step surface 103 arranged on the side surface of the sub-spray arm 100 is smaller, so that the step surface is easy to process to be straight, and the edge of the spray arm hydrophobic shell 110 can also be processed to be straight. The step surface 103 can play a supporting role and a limiting role for the spray arm hydrophobic shell 110. After the edge of the spray arm hydrophobic shell 110 abuts against the step surface 103, the position of the spray arm hydrophobic shell 110 relative to the sub-spray arms 100 is more stable, and the spray arm hydrophobic shell 110 cannot easily shake in the rotation process of the sub-spray arms 100. The shape of the spray arm hydrophobic shell 110 is not required in the structure, and the edge of the spray arm hydrophobic shell 110 can be positioned and supported by the step surface 103.

In the present embodiment, the upper surface of the sub-nozzle arm 100 includes two side slopes 106, the two side slopes 106 are symmetrically disposed on two sides of the upper surface, and the height of the side slopes 106 gradually decreases in a direction away from the sub-nozzle arm 100, that is, an edge of the side slope 106 close to the center of the sub-nozzle arm 100 is higher than an edge of the side slope 106 away from the center of the sub-nozzle arm 100.

The middle of the sub-spray arm 100 is high and gradually inclines outwards to extend a downward structure, water flow guiding on the surface of the sub-spray arm 100 can be enhanced, residue of washing liquid can be reduced by matching with the use of the spray arm hydrophobic shell 110, accumulated water and hanging beads are reduced, draining performance is good, and the drying effect of the whole machine is improved.

The upper surface of the sub-spray arm 100 may include only two side slopes 106, and the two side slopes 106 are directly connected. The upper surface of the sub-spray arm 100 may further include a top plane 105, two side slopes 106 are symmetrically connected to both sides of the top plane 105, and the spray holes 130 are disposed on the top plane 105.

When the upper surface of the sub-spray arm 100 only comprises two side inclined planes 106, the spray arm hydrophobic shell 110 is respectively attached to the two side inclined planes 106; when the upper surface of the sub-spray arm 100 comprises the top plane 105 and the two side inclined planes 106, the spray arm hydrophobic shell 110 is respectively attached to the top plane 105 and the two side inclined planes 106, namely, the spray arm hydrophobic shell 110 also forms a structure which is high in the middle and gradually inclines outwards and extends downwards, the guiding effect on the washing liquid is enhanced by utilizing the height change, and the accumulated water and the hanging beads are reduced.

The main factor influencing the pressure and the flow rate of the washing liquid sprayed from the spraying holes 130 is the width of the space for containing the washing liquid in the sub-spraying arms 100, when the space is wide, the washing liquid can be sprayed from the spraying holes 130 after being filled into the water inlet pipe 220 for a long time, and the water pressure and the flow rate at the spraying holes 130 are low; when the space is narrow, the water can be discharged from the spraying holes 130 as soon as possible, and the water pressure is higher and the flow speed is faster. In order to ensure sufficient strength of the sub-spray arms 100 and prevent the sub-spray arms 100 from bending, deforming and even breaking under the action of water pressure and rotational inertia force, the sub-spray arms 100 cannot be designed to be too thin.

In this embodiment, the spray arm structure further includes a main body hydrophobic shell 210, and the main body hydrophobic shell 210 is attached to the surface of the water inlet portion 200. The main body hydrophobic shell 210 plays a role in decoration and drainage, and increases the weight of the water inlet portion 200, so that the stability of the water inlet portion 200 in rotation can be improved, the risk of shaking the water inlet portion 200 is reduced, the washing effect of the spray arm structure is optimized, and the attractiveness of the appearance of the water inlet portion 200 is improved. Specifically, the main body hydrophobic shell 210 partially covers the upper surface of the water inlet part 200.

Preferably, the main body hydrophobic shell 210 is made of a metal sheet. Specifically, the metal sheet is made of stainless steel or aluminum alloy. The design is favorable for increasing the appearance texture of the water inlet part 200, so that water drops are not easy to remain on the water inlet part 200 after washing is finished. The design of sheet is selected for use to main part hydrophobic shell 210, can make main part hydrophobic shell 210 closely paste and apply in the upper surface of portion 200 of intaking, has reduced main part hydrophobic shell 210 because of the risk that the accident drops, has further reduced the space that portion 200 of intaking occupy.

In this embodiment, the edge of the main body hydrophobic shell 210 is provided with a main body flange, and the main body flange partially wraps the side surface of the water inlet part 200. The installation effect of the main body hydrophobic shell 210 on the water inlet part 200 is further improved by the arrangement of the main body flanging, and the risk of position deviation of the main body hydrophobic shell 210 is greatly reduced.

Preferably, the edge of the main body flanging is convexly provided with a plurality of second bent claws 211 at intervals, the bottom of the water inlet part 200 is provided with a main body buckling groove, the number of the main body buckling grooves is the same as that of the second bent claws 211, the second bent claws 211 are matched and buckled in the main body buckling groove after being bent, and the main body hydrophobic shell 210 is stably assembled on the water inlet part 200 due to the design.

In the present embodiment, a slag collecting hole 140 communicating with the liquid channel 120 is formed in a lower surface of one sub-spray arm 100, and the slag collecting hole 140 extends from top to bottom toward a direction close to a central rotation axis of the spray arm structure.

The slag collecting hole 140 with the inclined center is additionally arranged on the lower surface of the sub-spray arm 100, so that the slag can be flushed into a water tank of washing equipment along the water flow direction of the washing liquid, and dead angles of a spray arm structure during spraying are further reduced. The slag collecting hole 140 is formed, so that the spray arm structure effectively accelerates the recovery of washed residues, and the cleanness of the bottom of the washing equipment is ensured.

The embodiment also provides a dish washing machine, which comprises a box body and a washing pump and further comprises the spray arm structure, the spray arm structure is rotatably arranged in the box body, and the water inlet part 200 is communicated with the washing pump.

The dishwasher is preferably a spray dishwasher, the washing liquid being sprayed to wash the dishes to be cleaned. When the dishwasher starts to wash, the washing pump is started, and washing liquid is heated and pressurized by the washing pump, then is transmitted to the water inlet pipe 220 through the water path system, and then enters the conical liquid flow passage 120 from the hollow cavity to wash tableware in the box body, so that the automatic washing of the tableware is realized.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (11)

1. A spray arm structure, comprising:

a water inlet portion (200), the water inlet portion (200) being communicable with a washing pump;

the spraying device comprises at least two sub-spraying arms (100), wherein the sub-spraying arms (100) are arranged around the water inlet part (200) in a circumferential uniform mode, a liquid flow channel (120) is arranged in each sub-spraying arm (100), the liquid flow channel (120) is communicated with the water inlet part (200), a plurality of spraying holes (130) communicated with the liquid flow channel (120) are formed in the surface of each sub-spraying arm (100), and the spraying holes (130) are distributed along the axis of the corresponding sub-spraying arm (100).

2. Spray arm construction according to claim 1, characterized in that the cross-sectional area of the liquid channel (120) decreases in the direction from the water inlet (200) to the end of the sub-spray arm (100).

3. The spray arm structure of claim 2, wherein two reinforcing ribs (104) are arranged in the sub-spray arm (100), the two reinforcing ribs (104) and the inner wall of the sub-spray arm (100) enclose to form a liquid flow channel (120), and the distance between the two reinforcing ribs (104) decreases along the flowing direction of the washing liquid.

4. The spray arm structure according to claim 3, wherein the lower inner wall of the sub-spray arm (100) is gradually inclined toward the upper inner wall of the sub-spray arm (100) in the direction of the flow of the washing liquid.

5. Spray arm construction according to claim 1, characterized in that the cross-sectional shape of the liquid channel (120) is conical, the spray holes (130) opening at the small end of the conical shape.

6. The spray arm structure according to any one of claims 1 to 5, characterized in that the spray arm structure further comprises a spray arm hydrophobic shell (110), wherein the spray arm hydrophobic shell (110) at least partially covers the surface of the sub-spray arm (100).

7. The spray arm structure of claim 6, characterized in that the upper surface of the sub-spray arm (100) comprises two side inclined surfaces (106), the two side inclined surfaces (106) are symmetrically arranged on two sides of the upper surface, and the height of the side inclined surfaces (106) is gradually reduced along the direction away from the sub-spray arm (100).

8. The spray arm structure according to claim 7, characterized in that the upper surface of the sub-spray arm (100) further comprises a top plane (105), two side slopes (106) are symmetrically connected on two sides of the top plane (105), and the spray arm hydrophobic shell (110) is attached to the upper surface.

9. Spray arm structure according to claim 6, characterized in that the spray arm hydrophobic shell (110) is made of sheet metal.

10. The spray arm structure of any one of claims 1 to 5, wherein a lower surface of one of the sub-spray arms (100) is provided with a slag collecting hole (140) communicated with the liquid flow channel (120), and the slag collecting hole (140) extends from top to bottom towards a direction close to a central rotating shaft of the spray arm structure.

11. A dishwasher comprising a tank and a washing pump, characterized in that it further comprises a spray arm structure as claimed in any one of claims 1 to 10, said spray arm structure being rotatably arranged in said tank, said water inlet (200) being in communication with said washing pump.

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