Fan blade with backflow structure

Abstract

The utility model discloses a fan blade with a backflow structure. The fan blade comprises a base plate and a wind guide edge. The base plate is arranged in a circular mode, and the air guide edge is connected to the outer edge of the base plate and extends downwards in an inclined mode. A mounting hole is formed in the center of the base plate, a plurality of blades protruding downwards are arranged with the mounting hole as the center, and the blades point to the air guide edge in the radial direction of the mounting hole. According to the fan blade, the circle of air guide edge is designed on the outer edge of the base plate, when the fan blade rotates, air is blown out towards the periphery along the blades of the fan blade, and when the air reaches the air guide edge on the periphery of the fan blade, due to the fact that the air guide edge and the blades are not in the same direction and are in a horn shape outwards, the air can be blown out towards the opening direction of the horn shape along the air guide edge. And a negative pressure space is naturally formed in the center of the fan blade, so that a backflow vortex is formed in the space below the fan blade, airflow can flow back from the center of the fan blade and then circulate along the air guide edge of the blade, and the efficiency of the fan blade is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan blade technical field, more specifically, it is fan blade with backflow structure. BACKGROUND

[0002] Fan blade is used for guiding and accelerating gas flow, and is a necessary structure in fan products. In the prior art, fan blades are often used in some kitchen cooking equipment, such as pressure cookers, electric rice cookers or air fryers, etc. In particular, in an air fryer, cold fan blades and warm fan blades are arranged. The warm fan blades mainly promote the uniform flow of heat in the inner container, so that the food is heated uniformly. The cold fan blades are mainly used for heat dissipation of the outer pot to prevent the outer pot from being too hot. The structure of the conventional fan blade applied to the air fryer needs to be improved. SUMMARY

[0003] Therefore, the utility model provides fan blade with backflow structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: fan blade with backflow structure, comprising: a substrate and a wind guide edge; the substrate is circularly arranged, the wind guide edge is connected to the outer edge of the substrate and extends downward and outward; a mounting hole is formed at the center of the substrate, and a plurality of blades protruding downward are arranged around the mounting hole, and the blades point radially from the mounting hole to the wind guide edge.

[0005] As a preferred scheme of the utility model, the wind guide edge extends downward and outward from the connection with the substrate.

[0006] As a preferred scheme of the utility model, the blades are bent downward from the substrate to form a perforation with the same shape as the blades on the substrate.

[0007] As a preferred scheme of the utility model, the blades are uniformly distributed around the mounting hole.

[0008] As a preferred scheme of the utility model, the distance by which the blades protrude downward is less than the distance by which the wind guide edge extends downward.

[0009] As a preferred scheme of the utility model, the substrate is further provided with a reinforcing rib, and the reinforcing rib is arranged between two adjacent blades.

[0010] As a preferred scheme of the utility model, the reinforcing rib protrudes from the upper surface or the lower surface of the substrate.

[0011] As a preferred scheme of the utility model, the substrate and the wind guide edge are made of metal material as an integral structure.

[0012] Through the above technical solution, it can be seen that compared with the existing technology, the utility model has the following beneficial technical effects: the fan blade of the utility model is designed with a circle of wind guide edges on the outer edge of the base plate. When the fan blade rotates, the air is fanned out to the periphery along the blade of the fan blade. When it reaches the wind guide edge around the fan blade, because the wind guide edge and the blade are not in the same direction, the air will be blown out along the wind guide edge toward the trumpet-shaped opening, and a negative pressure space will naturally be formed in the center of the fan blade, so that the space under the fan blade forms a backflow vortex, which can enhance the airflow backflow from the center of the fan blade, and then circulate along the blade toward the wind guide edge, effectively improving the efficiency of the fan blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a front schematic diagram of the present utility model.

[0016] Description of Reference Numerals

[0017] Base plate 100; mounting hole 110; blade 120; through hole 130; reinforcing rib 140; wind guide edge 200; DETAILED DESCRIPTION

[0018] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0019] The fan blade with a self-contained backflow structure includes a base plate 100 and a wind guide edge 200 . The wind guide edge 200 is connected to the outer edge of the base plate 100 and extends obliquely downward.

[0020] Specifically, such as Figures 1-2 As shown, Figure 1The figure is generally viewed from the bottom surface of the base plate 100. The base plate 100 is circular, and the air guide edge 200 is connected to the outer edge of the base plate 100 and is arranged in a ring shape. The base plate 100 and the air guide edge 200 can be made of metal to form an integrated structure or can be made of plastic injection molded to form an integrated structure. Since this product is used in an air fryer, the temperature inside the air fryer is high and food is cooked at high temperature. Therefore, it is preferred that the base plate 100 and the air guide edge 200 are made of metal to form an integrated structure.

[0021] Optionally, the base plate 100 and the air guide edge 200 may also be a split structure, such as manufacturing the base plate 100 and the air guide edge 200 separately, and then riveting or fixing them together. There is no gap at the connection between the base plate 100 and the air guide edge 200 to prevent air leakage.

[0022] A mounting hole 110 is formed at the center of the base plate 100 , and a plurality of blades 120 protruding downward are provided with the mounting hole 110 as the center. The blades 120 point radially from the mounting hole 110 toward the wind guide edge 200 .

[0023] Continue as Figures 1-2 As shown, the power shaft of the driving member (not shown) is installed in the mounting hole 110 to drive the fan blades to rotate. The driving member can be a motor;

[0024] During the rotation of the driving member, the airflow rises from the middle, contacts the lower surface of the base plate 100, flows along the blades 120 and flows toward the wind guide edge 200, and flows downward under the guidance of the wind guide edge 200;

[0025] As shown in Figure 2, since the wind guide edge 200 is tilted downward and outward, the air will be blown out along the wind guide edge 200 toward the trumpet-shaped opening, and a negative pressure space will naturally be formed at the center of the fan blade, thereby forming a backflow vortex in the space under the fan blade, which can enhance the airflow backflow from the center of the fan blade, and then circulate along the blade 120 to the wind guide edge 200, effectively improving the efficiency of the fan blade.

[0026] In one embodiment, the air guide edge 200 extends downward and outward from the connection with the base plate 100 , so that a trumpet-shaped opening is formed below the base plate 100 .

[0027] In one embodiment, the blade 120 is formed by bending downward from the base plate 100, and a through hole 130 having the same shape as the blade 120 is formed on the base plate 100;

[0028] During the production of the wind blade, the blade 120 can be cut on the substrate 100 by cutting. After cutting into a suitable shape, the blade 120 is bent downward, and accordingly, a through hole 130 with the same shape as the blade 120 is generated on the substrate 100.

[0029] Optionally, the vane 120 can also be installed on the lower surface of the substrate 100, but this way the structure is slightly more complicated; and after the vane 120 is installed, the substrate 100 can not be provided with the perforations 130.

[0030] In one embodiment, the vane 120 is evenly distributed around the mounting hole 110.

[0031] In one embodiment, the vane 120 protrudes downward by a distance less than the distance by which the air guide edge 200 extends downward, i.e. as shown in Figure 2 viewed from the side, the vane 120 is shielded by the air guide edge 200.

[0032] In one embodiment, the substrate 100 is also provided with a reinforcing rib 140, and the reinforcing rib 140 is arranged between two adjacent vanes 120; the reinforcing rib can increase the hardness of the vane and prevent deformation.

[0033] In one embodiment, the reinforcing rib 140 protrudes from the upper surface or the lower surface of the substrate 100, preferably as shown in Figure 1 the reinforcing rib 140 protrudes from the lower surface of the substrate 100.

[0034] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fan blade with a backflow structure, characterized in that: The utility model relates to a circular air deflector, comprising: a substrate (100) and a wind deflector (200); the substrate (100) is circularly arranged, the wind deflector (200) is connected to the outer edge of the substrate (100) and extends downwardly and obliquely, a mounting hole (110) is formed at the center of the substrate (100), and a plurality of downwardly protruding blades (120) are arranged around the mounting hole (110) and radially point to the wind deflector (200) from the mounting hole (110).

2. The fan blade with backflow structure according to claim 1, characterized in that: The wind deflector (200) extends downwardly and obliquely from the connection with the substrate (100).

3. The fan blade with backflow structure according to claim 1, characterized in that: The blades (120) are bent downwardly from the substrate (100) and correspondingly have perforations (130) formed on the substrate (100) and having the same shape as the blades (120).

4. The fan blade with backflow structure according to claim 3, characterized in that: The blades (120) are uniformly distributed around the mounting hole (110).

5. The fan blade with backflow structure according to claim 3, characterized in that: The blades (120) protrude downwardly by a distance less than the distance by which the wind deflector (200) extends downwardly.

6. The fan blade with backflow structure according to claim 1, characterized in that: The substrate (100) is further provided with reinforcing ribs (140), and the reinforcing ribs (140) are arranged between adjacent blades (120).

7. The fan blade with backflow structure according to claim 6, characterized in that: The reinforcing ribs (140) protrude from the upper surface or the lower surface of the substrate (100).

8. The fan blade with backflow structure according to claim 1, characterized in that: The substrate (100) and the wind deflector (200) are made of metal and are integrated.

Images