CN109691957B

CN109691957B - Spray arm assembly and water-using household appliance

Info

Publication number: CN109691957B
Application number: CN201910173004.2A
Authority: CN
Inventors: 杜光辉; 李翔; 陈盈杰
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2019-03-07
Filing date: 2019-03-07
Publication date: 2021-08-10
Anticipated expiration: 2039-03-07
Also published as: CN109691957A

Abstract

The invention discloses a spray arm assembly and a water-using household appliance, wherein the spray arm assembly (100) comprises a spray arm (2) and a flow expansion structure, the spray arm (2) is provided with a horizontal lateral spray hole (12) communicated with a spray arm cavity, a lateral opening along the horizontal direction is formed in the horizontal lateral spray hole (12), and the flow expansion structure is arranged on a fluid path of a sprayed fluid of the horizontal lateral spray hole (12) and is used for expanding the diffusion angle of the sprayed fluid. In the invention, the horizontal lateral spray holes are arranged in the spray arm assembly, so that the water pressure in the spray arm cavity can be ensured to be sufficient to ensure the cleaning capability of the sprayed fluid on the tableware, and the flow expanding structure is arranged in the spray arm assembly, so that the cleaning range of the sprayed fluid can be expanded, and the tableware cleaning effect can be improved.

Description

Spray arm assembly and water-using household appliance

Technical Field

The invention relates to the technical field of household appliances, in particular to a spray arm assembly and a water-using household appliance.

Background

In the existing dish washer, the spray arm is used as a core component, and the structural design of the spray arm directly determines the washing capacity of the dish washer. Under the general condition, be equipped with two spray arms about being equipped with in the dish washer in order being used for respectively wasing two bowls basket about, in order to further promote the cleaning performance, will go up the spray arm and set up between two bowls basket about, through set up the orifice respectively at its top surface and bottom surface, can wash bowl basket about simultaneously.

However, when the number of the spray holes on the bottom surface of the upper spray arm is large, the water pressure in the cavity of the spray arm is greatly reduced, so that the flushing capacity of the sprayed fluid is greatly reduced, namely, the cleaning effect is poor. When the number of the bottom surface spray holes is small, the spraying range of the sprayed fluid is reduced, and the cleaning effect is difficult to ensure.

Disclosure of Invention

Aiming at the defects or shortcomings in the prior art, the invention provides the spray arm assembly and the water-using household appliance, which can ensure that the water pressure in the spray arm cavity is sufficient and increase the spraying range of the spray arm assembly, thereby effectively improving the cleaning effect.

In order to achieve the above object, the present invention provides a spray arm assembly including a spray arm provided with a horizontal lateral spray hole communicating with a spray arm cavity, the horizontal lateral spray hole being formed with a lateral opening in a horizontal direction, and a flow expansion structure provided on a fluid path of a sprayed fluid of the horizontal lateral spray hole and for expanding a diffusion angle of the sprayed fluid.

Optionally, the spray arm includes that the upper and lower lid closes the installation in order to inject jointly spray arm upper segment and the spray arm lower segment in the spray arm chamber, the periphery wall of spray arm lower segment is equipped with horizontal side direction orifice, the week of spray arm upper segment is followed and is equipped with the flagging week that encircles spray arm lower segment is followed the wall, the structure that expands flows sets up on the flagging week is followed the wall.

Optionally, the flow expansion structure includes a plurality of flow expansion columns sequentially formed on the wall of the lower peripheral edge at intervals, the plurality of flow expansion columns are arranged in a comb-tooth shape along the length direction of the spray arm, a flow passage gap is formed between adjacent flow expansion columns, and a plurality of guide flow expansion surfaces are formed on the surfaces of the flow expansion columns.

Optionally, the guide flow spreading surface comprises a plurality of chamfered surfaces facing different directions.

Optionally, along the length direction of the spray arm, the total span of the plurality of flow expansion columns is larger than the orifice span of the horizontal lateral spray orifices.

Optionally, the horizontal lateral orifices are flared divergent orifices.

Optionally, a plurality of main nozzle holes communicated with the nozzle arm cavity are arranged on the nozzle arm top surface of the nozzle arm, and the minimum aperture of the outward flared flow expansion nozzle hole is not larger than the aperture of the main nozzle hole.

Optionally, the number of horizontal lateral orifices is no more than 3.

Optionally, the horizontal lateral spray holes are provided on an outer end of the spray arm in the length direction.

In addition, the invention also provides a water-using household appliance adopting the spray arm assembly.

Through the technical scheme, the horizontal lateral spray holes are formed in the spray arm of the spray arm assembly, so that insufficient water pressure in the spray arm cavity caused by excessive spray holes is avoided, the sprayed fluid is ensured to have higher spraying speed, and the washing capacity of tableware is ensured. In addition, the spray arm assembly is also provided with a flow expansion structure on a fluid path of the sprayed fluid of the horizontal side spray hole, so that the diffusion angle of the sprayed fluid can be expanded to enlarge the cleaning range of the sprayed fluid, and the cleaning effect is effectively improved.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a perspective view of a spray arm assembly having a spray arm diversion structure according to an embodiment of the present invention;

fig. 2 is an exploded view of the structure of the spray arm assembly of fig. 1;

FIG. 3 is an enlarged partial schematic view of the spray arm assembly of FIG. 1;

FIG. 4 is a side cross-sectional view of the spray arm assembly of FIG. 1;

FIG. 5 is a schematic view of a lower plate of the spray arm assembly of FIG. 1;

fig. 6 is a perspective view of a spray arm assembly provided with a flow spreading structure according to an embodiment of the present invention;

FIG. 7 is a top perspective view of the spray arm assembly of FIG. 6;

FIG. 8 is an enlarged partial schematic view A-A of the spray arm assembly of FIG. 7;

fig. 9 is a top partial perspective view of the spray arm top piece of the spray arm assembly of fig. 6.

Description of reference numerals:

100 spray arm assembly

1 water inlet pipe and 2 spray arms

3 spray arm upper plate and 4 spray arm lower plate

5 annular water containing groove 6 drainage hole

7 water baffle 8 drainage rib position

9 rib position gap 10 water inlet sleeve part

11 connect 12 horizontal side direction orifices of snap ring

13 downward hanging peripheral wall 14 flow-expanding column

15 main jet hole

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In embodiments of the invention, where the context requires otherwise, the use of directional terms such as "upper, lower, top and bottom" is generally intended in the orientation shown in the drawings or the positional relationship of the various components in a vertical, vertical or gravitational orientation.

The invention will be described in detail below with reference to exemplary embodiments and with reference to the accompanying drawings.

As shown in fig. 1 to 5, an exemplary embodiment of the present invention provides a spray arm assembly 100. The spray arm assembly 100 includes a water inlet pipe 1 and a spray arm 2, and the spray arm 2 includes a spray arm pivot connection portion connected to the water inlet pipe 1 and a spray arm drainage structure. The spray arm drainage structure is used for draining overflow fluid in a pivoting assembly gap between the spray arm pivoting connection part and the water inlet pipe 1 and draining the overflow fluid from the spray arm pivoting connection part along the length direction of the spray arm 2.

It can be seen that during operation of the spray arm assembly 100, the overflow fluid in the pivot assembly gap between the spray arm pivot connection and the water inlet pipe 1 does not flow directly vertically downward, but rather is directed along the length of the spray arm 2 from the spray arm pivot connection by the flow directing action of the spray arm flow directing structure. When the overflow fluid is directed radially outward of the spray arm pivot connection, the overflow fluid can accelerate in a horizontal direction due to the rotation of the spray arm, providing a washing capability for washing dishes. In other words, by providing the spray arm drainage structure, the spray arm assembly 100 can clean the dishes by using the overflow fluid, thereby reducing the waste of the washing fluid, improving the utilization rate of the washing fluid, and further improving the washing effect of the dishes.

In some embodiments, the spray arm draining structure can drain the overflow fluid to the bottom surface of the spray arm 2, thereby improving the washing effect of the dishes under the spray arm 2. Alternatively, the spray arm drainage structure can drain the overflow fluid to the side wall of the spray arm 2 along the horizontal direction, and the overflow fluid can also have the capability of washing the tableware.

In some embodiments, the spray arm flow directing structure includes a first flow directing structure and a second flow directing structure. The first drainage structure is located on the top surface of the spray arm at the pivot connection part of the spray arm, so that the overflow fluid is drained to the bottom surface of the spray arm at the pivot connection part of the spray arm. The second flow guiding structure is arranged at the bottom of the spray arm 2 and extends along the length direction of the spray arm 2 so as to further guide overflow fluid on the bottom surface of the spray arm at the pivot connection part of the spray arm to the radial outer side of the spray arm 2.

In other words, through the cooperation of the first drainage structure and the second drainage structure, the overflow fluid can be drained to the bottom surface of the spray arm on the radial outer side of the pivot connection part of the spray arm, so that the overflow fluid has a speed along the horizontal direction along with the rotation of the spray arm, and the overflow fluid can be obliquely sprayed downwards to wash tableware below the spray arm 2 under the action of the gravity of the overflow fluid.

In some embodiments, as shown in fig. 3, the first flow directing structure comprises an annular water containing groove 5 for collecting overflow fluid and a drain hole 6 arranged radially outside the annular water containing groove 5. Wherein, the annular water containing groove 5 is formed on the spray arm top surface of the spray arm pivot connection part and is arranged around the pivot connection structure between the spray arm 2 and the water inlet pipe 1, and the drain hole 6 penetrates from the annular water containing groove 5 on the spray arm top surface to the spray arm bottom surface.

The direction of the dashed arrows in fig. 3 is the direction of the overflow fluid flow over the annular water receiving groove 5. After overflowing fluid from the pivot assembly gap of the pivot connection structure, the overflowing fluid flows into the annular water containing groove 5 under the action of gravity, the annular water containing groove 5 can guide the overflowing fluid to the drainage hole 6, then the overflowing fluid flows from the top surface of the spray arm to the bottom surface of the spray arm through the drainage hole 6, and finally flows to the radial outer side of the pivot connection part of the spray arm under the drainage action of the second drainage structure, so that the tableware below is accelerated and sprayed in the horizontal direction.

In order to avoid the overflow fluid from flowing vertically directly down through the drain hole 6, in some embodiments, as shown in fig. 4, a water baffle 7 may be provided in the drain hole 6, the water baffle 7 extending from a radially outer side wall surface of the inner peripheral wall of the drain hole 6 obliquely downward toward a radially inner side wall surface of the inner peripheral wall, and being spaced apart from the radially inner side wall surface of the inner peripheral wall of the drain hole 6 to leave a flow gap.

The dashed line in fig. 4 is the flow path of the cleaning fluid. Due to the blocking effect of the water baffle 7, most of overflow fluid can only flow along the radial inner side wall surface of the inner peripheral wall of the drain hole 6 and finally flows into the second drainage structure at the bottom surface of the spray arm, so that excessive overflow fluid is prevented from flowing vertically and being not utilized.

In some embodiments, the second flow directing structure comprises flow directing ribs 8 integrally formed to protrude from the bottom surface of the spray arm. Wherein, the drainage rib position 8 can set up to arrange, can set up to the straight extension form or the crooked extension form, can set up to the outermost end along length direction that extends to spray arm 2 from spray arm pivot joint portion on the spray arm bottom surface at an interval.

Further, as shown in fig. 5, a plurality of rib position notches 9 may be provided on the flow guiding rib position 8 at intervals in sequence along the length direction of the spray arm 2. The direction of the dotted line arrow in fig. 5 is the flowing direction of the overflow fluid on the bottom surface of the spray arm, when the overflow fluid flows along the drainage rib 8, every time the overflow fluid reaches a rib notch 9, a part of the overflow fluid is separated from the bottom surface of the spray arm and flows down, and therefore the purpose of cleaning tableware below the spray arm 2 is achieved. In other words, the positions of the spraying of the overflow fluid are sequentially arranged along the length direction of the spray arm 2 at intervals, so that the spraying range of the overflow fluid is enlarged, and the washing effect is improved.

In order to ensure that the overflow fluid can flow along the flow guiding rib position 8 to the radial outer side of the spray arm pivot connection part, the flow guiding rib position 8 can be arranged to extend obliquely downwards from inside to outside along the length direction of the spray arm 2. In other words, along the length direction of the spray arm 2, the outermost end of the drainage rib position 8 is lower than the innermost end, so that the overflow fluid can spontaneously flow along the drainage rib position 8 under the action of the self gravity.

In some embodiments, the spray arm top surface of the spray arm pivotal connection is provided with an upwardly projecting water inlet sleeve portion 10, and the spray arm assembly 100 includes a connection snap ring 11 mounted between the water inlet sleeve portion 10 and the water outlet end of the water inlet tube. Wherein, a fixed connection is formed between the water outlet end of the water inlet pipe and the connecting snap ring 11, a pivot connection is formed between the connecting snap ring 11 and the water inlet sleeve part 10, and a pivot assembly gap is formed, and at the moment, overflow fluid mainly overflows from the pivot assembly gap.

In some embodiments, the spray arm 2 includes an upper spray arm piece 3 and a lower spray arm piece 4 that are mounted in close proximity to each other to collectively define a spray arm cavity. At the moment, the first drainage structure is arranged on the top surface of the spray arm of the upper spray arm piece 3, and the second drainage structure is arranged on the bottom surface of the spray arm of the lower spray arm piece 4.

Another exemplary embodiment of the present invention, as shown in fig. 6 to 9, provides another spray arm assembly 100. The spray arm assembly 100 comprises a spray arm 2 and a flow expansion structure, wherein the spray arm 2 is provided with a horizontal lateral spray hole 12 communicated with a spray arm cavity. The horizontal lateral spray holes 12 are formed with lateral openings along the horizontal direction, and the flow expansion structure is arranged on a fluid path of the sprayed fluid of the horizontal lateral spray holes 12 and can be used for expanding the diffusion angle of the sprayed fluid, namely expanding the cleaning range of the sprayed fluid.

Therefore, by arranging the horizontal lateral spray holes 12 on the spray arm 2, a plurality of spray holes do not need to be arranged on the bottom surface of the spray arm for cleaning the tableware below, the condition that the water pressure in the cavity of the spray arm is insufficient due to excessive spray holes is avoided, and the sprayed fluid for cleaning the horizontal lateral spray holes 12 of the tableware below is ensured to have higher spraying speed so as to realize efficient washing. In addition, by providing a flow spreading structure on the fluid path of the ejected fluid in the horizontal side direction nozzle hole 12, the spreading angle of the ejected fluid can be enlarged to increase the cleaning range, thereby making up for the technical defect of small cleaning range caused by the small number of nozzle holes.

In other words, by providing the horizontal lateral spray holes 12 and the flow expansion structure, the spray arm assembly 100 can increase the spray range under the condition of ensuring sufficient water pressure in the spray arm cavity, thereby effectively improving the washing effect on the tableware.

In some embodiments, the spray arm 2 includes an upper spray arm piece 3 and a lower spray arm piece 4 that are mounted in close proximity to each other to collectively define a spray arm cavity. For example, in the embodiment shown in fig. 6 to 9, the peripheral wall of the lower arm piece 4 is provided with horizontal lateral spray holes 12, and the peripheral edge of the upper arm piece 3 is provided with a lower peripheral edge wall 13 surrounding the lower arm piece 4, in which case the flow spreading structure is provided on the lower peripheral edge wall 13.

It should be noted that in other embodiments, the flow spreading structure is not necessarily an integral part of the nozzle arm 2, but may be another structure of the nozzle arm assembly 100 independent of the nozzle arm 2, so long as the flow spreading structure is always disposed in the fluid path of the ejected fluid from the horizontal lateral nozzle holes 12 and can extend the spreading angle of the ejected fluid.

In some embodiments, the flow spreading structure may include a plurality of flow spreading columns 14 sequentially spaced apart from one another formed on the lower peripheral wall 13. The flow expansion columns 14 are arranged in a comb-tooth shape along the length direction of the spray arm 2, a flow gap is formed between every two adjacent flow expansion columns 14, and a plurality of guide flow expansion surfaces are formed on the surfaces of the flow expansion columns 14.

With this structure, the fluid ejected from the horizontal lateral spray holes 12 can be further ejected out of the spray arm assembly 100 through the flow passage gaps between the plurality of diffusion columns 14, so as to spray the dishes under the spray arm assembly 100. In the process that the sprayed fluid passes through the overflowing gaps among the flow expansion columns 14, the guide flow expansion surfaces can guide the sprayed fluid to be sprayed outwards, and can enlarge the diffusion angle of the sprayed fluid, so that the spraying range of the sprayed fluid is enlarged. For example, the guide diffuser surface may include a plurality of chamfered surfaces facing in different directions, and the spray angle of the spray fluid may be changed while the spray fluid flows through the plurality of chamfered surfaces, thereby making the spray range larger.

To ensure that the fluid ejected from the horizontal lateral nozzles 12 can be ejected after passing through the diffuser structure, in some embodiments, the total span of the plurality of diffuser columns 14 may be set to be greater than the aperture span of the horizontal lateral nozzles 12 along the length direction of the spray arm 2. Therefore, the sprayed fluid can be basically and completely sprayed into the flow expanding structure, and the spray washing range of the sprayed fluid is ensured to be enlarged.

Furthermore, the horizontal lateral orifices 12 may also be provided as flared divergent orifices flaring outwards. At this time, the ejected fluid from the horizontal lateral nozzle hole 12 may be diffused for the first time due to the outward flaring structure of the nozzle hole during the ejection process, and diffused for the second time after passing through the flaring structure. Through the two diffusion effects, the spray washing range of the sprayed fluid is larger, and the spray washing efficiency is higher.

However, it should be noted that, the horizontal lateral spray holes 12 are configured as diffusion spray holes, and the water pressure in the spray arm cavity may be insufficient due to the enlarged orifice, so as to avoid affecting the spray effect, the orifice diameter of the diffusion spray holes needs to be further limited. For example, in some embodiments, the top surface of the spray arm 2 is provided with a plurality of main spray holes 15 communicated with the spray arm cavity, and at this time, the minimum aperture of the outward flaring spray holes can be set to be not larger than the aperture of the main spray holes 15, so as to ensure that the water pressure in the spray arm cavity is sufficient.

In addition, the number of the horizontal lateral spray holes 12 needs to be limited, otherwise, when the number of the horizontal lateral spray holes 12 is large, the spray range of the spray arm assembly 100 can only be increased, but the water pressure in the spray arm cavity is reduced. In view of this, the number of horizontal lateral spray holes 12 is preferably set to not more than 3. For the spray arm assembly 100 of the embodiment of fig. 6 and 7, preferably only one horizontal lateral spray orifice 12 is provided.

On the other hand, in view of ensuring the ejection speed of the ejected fluid and maintaining the water pressure in the arm chamber, the horizontal lateral ejection holes 12 are preferably provided on the outer end portion of the arm 2 in the longitudinal direction. Under this structure, when the spray arm 2 rotates, the cleaning fluid sprayed from the horizontal side direction spray hole 12 provided on the outer end portion of the spray arm 2 in the length direction has a faster spray speed, and does not cause a problem of insufficient pressure in the spray arm chamber, which is advantageous for improving the reliability of the spray arm assembly 100.

In addition, another exemplary embodiment of the present invention also provides a water-using household appliance, which may be a dishwasher or the like appliance product having a washing function, using the spray arm assembly 100 described above. By adopting the spray arm assembly 100, the household appliance in the exemplary embodiment of the invention has the advantages of high efficiency, throttling, large spray range and the like, and the use experience of a user can be greatly improved.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.

It should be noted that, in the foregoing embodiments, various features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in further detail in the embodiments of the present invention.

In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.

Claims

1. A spray arm assembly, characterized in that the spray arm assembly (100) comprises a spray arm (2) and a flow expansion structure, the spray arm (2) is provided with a horizontal lateral spray hole (12) communicated with a spray arm cavity, the horizontal lateral spray hole (12) is formed with a lateral opening along the horizontal direction, and the flow expansion structure is arranged on a fluid path of a sprayed fluid of the horizontal lateral spray hole (12) and is used for expanding a diffusion angle of the sprayed fluid; spout arm (2) and close the installation including upper and lower lid in order to inject jointly spout the arm upper segment (3) and the arm lower segment (4) of arm chamber, the periphery wall that spouts arm lower segment (4) is equipped with horizontal side direction orifice (12), the week of spouting arm upper segment (3) is followed and is equipped with the encircleing spout the flagging week of arm lower segment (4) along wall (13), it sets up to expand the class structure on flagging week edge wall (13).

2. The spray arm assembly of claim 1, wherein the flow expansion structure comprises a plurality of flow expansion columns (14) sequentially formed on the lower peripheral wall (13) at intervals, the flow expansion columns (14) are arranged in a comb-tooth shape along the length direction of the spray arm (2), a flow gap is formed between adjacent flow expansion columns (14), and a plurality of guide flow expansion surfaces are formed on the surfaces of the flow expansion columns (14).

3. The spray arm assembly of claim 2 wherein said pilot diffuser surface includes a plurality of chamfered surfaces facing in different directions.

4. Spray arm assembly according to claim 2, characterized in that the total span of the plurality of flow-spreading columns (14) is greater than the orifice span of the horizontal lateral orifices (12) in the length direction of the spray arm (2).

5. The spray arm assembly of claim 1, wherein the horizontal lateral orifices (12) are flared divergent orifices.

6. The spray arm assembly of claim 5, wherein the spray arm top surface of the spray arm (2) is provided with a plurality of primary spray orifices (15) communicating with the spray arm cavity, and the minimum aperture of the flared diffuser spray orifices is not larger than the aperture of the primary spray orifices (15).

7. Spray arm assembly according to claim 1, characterized in that the number of horizontal lateral spray orifices (12) is not more than 3.

8. Spray arm assembly according to claim 1, characterized in that the horizontal lateral spray orifices (12) are provided on the outer end of the spray arm (2) in the length direction.

9. A water consumer appliance, characterized in that it comprises a spray arm assembly (100) according to any one of claims 1 to 8.