CN215170894U

CN215170894U - Head structure of fan and floor fan

Info

Publication number: CN215170894U
Application number: CN202120535607.5U
Authority: CN
Inventors: 周键
Original assignee: Dreame Technology Shanghai Co Ltd
Current assignee: Dreame Technology Shanghai Co Ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-12-14
Anticipated expiration: 2031-03-15

Abstract

The utility model relates to a head structure of a fan, which comprises a grid and an impeller; wherein, be provided with a plurality of ribs that extend along radial on the grid, the width of rib is followed one side of keeping away from the impeller and is decreased progressively to the one side direction that is close to the impeller. The utility model discloses still include a fan that falls to the ground. Through optimizing the cross-sectional area of the ribs, the longitudinal extrusion resistance is improved while the larger air passing area of the ribs is ensured, and meanwhile, the air passing surface of the ribs is a whole surface, so that dust accumulated on the air passing surface is reduced.

Description

Head structure of fan and floor fan

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of household appliances, concretely relates to head structure of fan still concretely relates to fan falls to ground.

[ background of the invention ]

In order to cool people in summer, the fan can effectively dissipate hot air, and the grille is arranged in the fan to guide the airflow formed by the impeller, so that smoother airflow is blown out of the fan, but the inventor finds that at least the following problems exist in the process of using the existing fan:

the existing ribs are limited by the size of the existing ribs due to the acting force of airflow on the surfaces of the existing ribs, the longitudinal anti-extrusion strength of the existing ribs is difficult to ensure, and the ribs are easy to damage under the condition that the airflow acts on the cross-wind section of the ribs for a long time; secondly, the existing ribs are usually in a step-shaped section shape to ensure the anti-extrusion strength, but the step-shaped section is easy to generate dust deposition at the turning part with high-low fall and is difficult to clean.

In view of the above, it is necessary to develop a head structure of a fan to solve the above problems.

[ Utility model ] content

Aiming at the defects of the prior art, the utility model aims to provide a head structure of a fan, which comprises a grid and an impeller;

the grating is provided with a plurality of ribs extending along the radial direction, and the width of each rib decreases progressively along the direction far away from one side of the impeller and close to one side of the impeller.

Preferably, a first end face is formed on one side, close to the impeller, of each rib, a second end face is formed on one side, far away from the impeller, of each rib, and the width of each first end face is smaller than that of each second end face.

Preferably, the ribs include tangential surfaces arranged in the tangential direction, and the tangential surfaces include a first air guiding edge and a second air guiding edge which are connected with the first end surface and the second end surface.

Preferably, the distance between the first air guide edge and the second air guide edge along the direction from the second end surface to the first end surface decreases progressively.

Preferably, the first wind guiding edge and the second wind guiding edge are recessed to form an arc-shaped structure.

Preferably, the rib comprises a main body part extending in the radial direction and a tail end part bent from the main body part, and the tail end part extends in a third direction perpendicular to both the radial direction and the annular direction.

Preferably, an annular reinforcing rib is further arranged in the grid.

On the other hand, the utility model provides a floor fan, including as above-mentioned head structure.

Preferably, still including setting up in the motor of grid and being located the ring of grid outside, the grid with the ring pin joint sets up.

Preferably, the ring includes first semicircle ring and with lower semicircle ring that last semicircle ring separation set up, the grid pin joint in on the semicircle ring down, last semicircle ring sets up on the grid

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a pair of head structure of fan optimizes through the cross-sectional area to the rib above that for the width that impeller one side was kept away from to the rib is steadilyd decrease to the width of opposite side, has improved fore-and-aft anti extrusion intensity simultaneously guaranteeing the great overfire area of rib, and simultaneously, rib surfacing adheres to the convenient clearance of dust above that.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

[ description of the 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 application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic view of a three-dimensional structure of the head structure of the present invention;

fig. 2 is a schematic view of a first perspective view of a three-dimensional structure of the grid according to the present invention;

FIG. 3 is an enlarged partial schematic view of FIG. 2;

FIG. 4 is a front view of the grille of the present invention in a first embodiment;

fig. 5 is a schematic view of a rib section according to a first embodiment of the present invention;

fig. 6 is a schematic view of a rib section according to a second embodiment of the present invention;

fig. 7 is a schematic view of a comparative example in the present invention;

fig. 8 is a schematic view of a second perspective view of the three-dimensional structure of the grille of the present invention;

FIG. 9 is an enlarged partial schematic view of FIG. 8;

fig. 10 is a schematic perspective view of a floor fan according to the present invention;

fig. 11 is a schematic diagram of a partial explosion of a floor fan according to the present invention;

fig. 12 is a schematic structural view of an inner fan body of a floor fan according to the present invention.

Description of reference numerals:

1. a rear grille;

11. an outer ring; 114. a pivot shaft; 115. an inner housing;

12. ribs; 121. a second end face; 122. a first end face; 123. cutting into noodles;

1201. a main body portion; 1202. a terminal portion;

13. an air passing port;

14. reinforcing ribs;

15. a connecting portion;

2. a fan body; 21. an impeller; 22. a circular ring; 221. a lower semicircular ring; 2211. a shaft hole; 222. an upper semicircular ring;

3. a front grille;

5. a base;

6. a rod member.

[ detailed description ] embodiments

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a more detailed description of the present invention, which will enable those skilled in the art to make and use the present invention. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, width, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the following embodiments or technical features can be used to form a new embodiment without conflict. It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

Referring to fig. 1 to 3, the present invention relates to a head structure of a fan, including a grill located in an air flow path formed by rotation of an impeller 21 in the fan;

wherein, a plurality of ribs 12 extending along the radial direction are arranged on the grating;

the air flow generated by the rotation of the impeller 21 is guided by the ribs 12, so that the air flow exerts a longitudinal pressing force on the ribs 12. Meanwhile, because the air passing opening 13 through which the air passes is formed between the adjacent ribs 12, the area of the air passing opening 13 directly influences the speed of the air passing, and along with the reduction of the air passing opening 13, the air passing through the air passing opening 13 is reduced, so that the air outlet speed of the fan is reduced, and the use is influenced. Therefore, in order to maintain the air outlet speed, the area of the air inlet 13 needs to be ensured in the design process, so that the width of the rib 12 needs to be limited, which also causes that the width of the rib 12 is difficult to increase, the longitudinal anti-extrusion strength of the rib 12 is insufficient, and the rib 12 is easy to damage in the long-term use process.

Referring to fig. 5-6, in order to solve the above problem, the width of the ribs 12 decreases from one side away from the impeller 21 to the other side close to the impeller 21, so as to change the air passing area of the ribs 12 on the air flow path.

A second end surface 121 is formed on one side of the rib 12 far away from the impeller 21, a first end surface 122 is formed on one side of the rib 12 near the impeller 21, the rib 12 comprises a tangent plane 123 arranged along the tangential direction, and the tangent plane 123 is the cross section of the rib 12.

Specifically, rib 12 follows second terminal surface 121 department is moved towards thickness (width) of first terminal surface 122 direction is steadilyd decrease, compares in current rib cross-section and is the rectangle, the utility model discloses well adopted rib 12 cross sectional shape can increase effectively the length of rib 12 wind-guiding surface, thereby the reinforcing rib 12 fore-and-aft anti extrusion strength, thereby the extension rib 12 life.

In the first embodiment

Referring to fig. 5, the tangent plane 123 includes a first wind guiding edge and a second wind guiding edge that connect the first end surface 122 and the second end surface 121, the first wind guiding edge and the second wind guiding edge are arranged up and down, and a distance between the first wind guiding edge and the second wind guiding edge along the direction from the second end surface 121 to the first end surface 122 decreases progressively, that is, the first wind guiding edge and the second wind guiding edge are gradually folded.

In this embodiment, the first wind guide edge and the second wind guide edge form an included angle, so that the tangent plane 123 forms a triangle-like structure, the first wind guide edge and the second wind guide edge intersect at a point, the first wind guide edge and the second wind guide edge have two translational degrees of freedom and one rotational degree of freedom, each hinge constrains the two degrees of freedom, and any component without fixed constraint has three degrees of freedom in total in action and rotation, so that the component can perform translational movement and rotation in the plane as a whole, and the first wind guide edge and the second wind guide edge cannot perform other movements; when the airflow on the two air guiding edges applies extrusion force to the air guiding edges, the tangent plane 123 on the rib 12 is in a triangular stable structure, so that the rib 12 can be provided with stable and pressure-resistant characteristics, and the longitudinal extrusion-resistant strength is increased. Meanwhile, three points are formed on the first wind guide edge and the second wind guide edge, and the resultant force of the three points is zero from the analysis of the stress condition of the three points, so that the tangent plane 123 has stability.

On the other hand, the thicknesses of the second end surface 121 and the first end surface 122 are different, so that air outlets formed between two adjacent ribs 12 and corresponding to two sides of the second end surface 121 and the first end surface 122 are different in size, the air speeds formed by the air outlets on the two sides are different, the air flow is improved when the air flows between the ribs 12 through openings with different sizes, and the air outlet of the floor fan is larger.

In the second embodiment

Referring to fig. 6, on the basis of the first embodiment, the first wind guiding edge and the second wind guiding edge are recessed inwards to form an arc structure, and the arc structure is not easy to deform under a stressed state, so that the longitudinal anti-extrusion strength is increased by using the anti-bending effect of the arc surface. The first air guide edge and the second air guide edge are arranged in an arc shape, so that the section moment of inertia is increased, and the strength of the rib 12 is improved.

It should be noted that, in this embodiment, the characteristic that the arc face is anti-buckling is utilized, and the air current flows on the arc face, can greatly reduce the extrusion to rib 12, therefore, tangent plane 123 is including connecting first terminal surface 122 with first wind guiding limit, the second wind guiding limit of second terminal surface 121, first wind guiding limit, second wind guiding limit longitudinal symmetry arrange, the sunken technical scheme that is the arcuation in first wind guiding limit, second wind guiding limit also should be regarded as the utility model discloses a specific implementation scheme.

On the other hand, in the present embodiment, the air-passing surface adopts an arc-shaped structure, and compared with the inclined surface in the first embodiment, the first air-guiding side and the second air-guiding side are arc-shaped, and the arc-shaped sides are longer than the straight air-guiding sides under the premise of the same distance, and further compared with the air-passing surface in the first embodiment, the air-passing surface in the present embodiment is larger than the air-passing surface in the first embodiment, and on the premise that the air flow is constant, the pressure of the air flow to the air-passing surface in the present embodiment is smaller, and the damage to the ribs 12 is smaller. The service life of the ribs 12 in this particular embodiment is therefore longer.

In the comparative example

The section forms a small platform with reduced width along the direction from the second end surface to the first end surface, so that the section forms a step shape.

Specifically, referring to fig. 7, the section of each rib includes a first air guiding edge and a second air guiding edge which are arranged vertically and symmetrically, and a stepped portion is arranged on each air guiding edge, so that the section of each rib is formed into a step shape; through setting up the stair portion, form the height drop on the wind-guiding edge to make the width that is close to impeller one side on the rib is less than the corresponding width of keeping away from the impeller opposite side, utilizes the intensity of facet to increase fore-and-aft anti extrusion intensity.

Although the ribs in the comparative example need to flow from the platform close to the second end face side to the platform close to the first end face side, in the process that the airflow flows from the high platform to the low platform, part of the airflow smoothly arcs on the low platform, and meanwhile part of the airflow flows to the low platform along the step part, so that the airflow impacts different positions of the low platform when falling, the extrusion force of the airflow on the ribs is distributed more uniformly, the uniform stress on the ribs is ensured, and the strength of the ribs is improved. However, the step portion is prone to deposit dust, and the dust deposited at the turning portion is difficult to clean due to the turning portion formed by the step.

In the first and second embodiments, the air passing surface of the ribs 12 is a whole surface and smooth, so that dust is difficult to attach to the air passing surface, and dead corners do not exist, and the air passing surface is convenient to clean.

Further, the grid comprises an outer ring 11, the outer ring 11 is of an annular structure, the ribs 12 are radially arranged in the outer ring 11, and the ribs 12 extend to the outer ring 11.

Specifically, as shown in fig. 8 and 9, the rib 12 includes a main body portion 1201 extending in the radial direction and a tip portion 1202 bent from the main body portion 1201, the tip portion 1202 is bonded to the outer ring 11, and the tip portion 1202 extends in a third direction perpendicular to both the radial direction and the circumferential direction, so as to improve the strength at the tip portion 1202.

As shown in fig. 4, the ribs 12 are disposed in the hollow portion of the outer ring 11, and the ribs 12 are radially arranged and extend and are coupled to the outer ring 11.

The outer ring 11 is a circular ring structure, the ribs 12 extend to the outer ring 11 along the radial direction of the outer ring 11, and the thickness of the initial end of the extending direction of the ribs 12 is smaller than that of the final end;

the size B of the rib 12 is larger than the size A, the larger the air passing area at the air passing opening 13 is, the larger the thickness of the rib 12 is, so that the extrusion force of more atmospheric flow is overcome, the air passing area with the minimum radial diameter of the grille is reserved, and the air passing area is ensured.

A reinforcing rib 14 is further arranged in the hollow portion of the outer ring 11, the reinforcing rib 14 is annular, the reinforcing rib 14 and the outer ring 11 are concentrically arranged and combined with the ribs 12 to form a fixed structure, the ribs 12 are further reinforced, and meanwhile, the reinforcing rib 14 is utilized to absorb partial extrusion force, so that the ribs 12 are better protected.

Referring to fig. 10-12, the present invention further relates to a floor fan with the head structure, wherein the floor fan comprises a rear grille 1, a front grille 3 and a fan body 2, and the fan body 2 comprises an impeller 21 and a motor for driving the impeller 21; the impeller 21 is positioned in a hollow cavity formed by connecting the rear grating 1 and the front grating 3, and the ribs 12 are arranged in at least one of the rear grating 1 and the front grating 3; in a preferred embodiment, the ribs 12 are disposed on both the rear grille 1 and the front grille 3, and the rib structure on the rear grille 1 and the rib structure on the front grille 3 are symmetrically disposed.

Further, the motor is accommodated in a hollow cavity of the head structure formed by connecting the rear grille 1 and the front grille 3, so that the volume of the whole head structure is reduced, and compared with a floor fan with the existing motor arranged outside the grille, the motor on the floor fan in the preferred embodiment is accommodated in the grille, so that the thickness of the whole fan head structure is reduced; meanwhile, when the floor fan is stored, the motor part on the back of the grille is reduced, and the volume required for storage is effectively reduced, so that the floor fan is convenient to store.

In this preferred embodiment, the rear grill 1, the front grill 3 and the impeller 21 constitute a head structure of the floor fan, the floor fan further includes a ring 22, the ring 22 is disposed outside the head structure, the head structure is pivoted on the ring 22, specifically, the ring 22 and the head structure are disposed in a gap, a pivot shaft 114 is disposed on an outer wall of the rear grill 1, a shaft hole 2211 is disposed on the ring 22, and the pivot shaft 114 is sleeved in the shaft hole 2211, so that the head structure rotates around the axis direction of the pivot shaft 114.

Meanwhile, the ring 22 includes an upper semicircular ring 222 and a lower semicircular ring 221 separated from the upper semicircular ring 222, the shaft hole 2211 is disposed on the lower semicircular ring 221, so that the head structure is pivoted on the lower semicircular ring 221, the upper semicircular ring 222 is disposed on the head structure, so that the upper semicircular ring 222 is opposite to the lower semicircular ring 221, wherein the upper semicircular ring 222 includes an inner shell 115 and an outer shell matched with the inner shell 115, the inner shell 115 is integrally formed on the outer wall of the rear grille 1, and the outer shell is connected to form the upper semicircular ring 222 through the inner shell 115 in a matching manner, so that the upper semicircular ring 222 is fixed on the rear grille 1.

The floor fan further comprises a rod 6 and a base 5, one end of the rod 6 is connected to the lower semicircular ring 221, the other end of the rod is connected to the base 5, a connecting portion 15 is arranged on the outer wall of the rear grille 1, the rod 6 is connected to the connecting portion 15, and the base 5 and the head structure are connected through the rod 6, so that the floor fan is connected to form an integral vertical structure.

It should be understood that the above-described embodiments are only illustrative of portions of the present application and are not intended to limit the scope of the present application.

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.

Claims

1. The head structure of a kind of fan, characterized by, including grid and impeller;

2. The header structure of claim 1, wherein a side of the ribs adjacent the impeller defines a first end surface, a side of the ribs remote from the impeller defines a second end surface, and the first end surface has a width less than the width of the second end surface.

3. The header structure of claim 2, wherein said ribs comprise tangential cuts, said cuts comprising a first wind-guiding edge and a second wind-guiding edge connecting said first end face and said second end face.

4. The header structure according to claim 3, wherein the first and second air guiding edges have a decreasing distance in a direction from the second end surface to the first end surface.

5. The head structure as claimed in claim 3, wherein the first and second air guiding edges are recessed to form an arc-shaped structure.

6. The head structure of claim 1, wherein said ribs include a body portion extending in said radial direction and a tip portion bent from said body portion, said tip portion extending in a third direction perpendicular to both the radial direction and the circumferential direction.

7. A head structure according to claim 6, characterised in that reinforcing ribs in the form of rings are also provided in the grating.

8. A floor fan comprising a head structure according to any one of claims 1 to 7.

9. A floor fan of claim 8, further comprising a motor disposed within the grille and a ring disposed outside the grille, the grille pivotally coupled to the ring.

10. A floor fan as claimed in claim 9, wherein the ring includes an upper half ring and a lower half ring spaced apart from the upper half ring, the grill being pivotally connected to the lower half ring, the upper half ring being disposed on the grill.