Wind wheel with improved balance structure to increase air volume

Abstract

The utility model discloses a wind wheel with an improved balance structure to increase air volume, which comprises fan blades, an air inlet hole is formed in the center surrounded by the fan blades, and an air inlet and an air outlet are formed among the fan blades; the upper edge and the lower edge of the fan blade are connected with an upper disc and a bottom disc respectively, the outer side edges of the upper disc and the bottom disc extend outwards to form a circle of balance wings, and a plurality of balance holes are formed in the upper balance wing and the lower balance wing. The upper balance wing and the upper disc are of an integrated structure, the lower balance wing and the bottom disc are of an integrated structure, and the upper disc, the bottom disc and the fan blades are of an integrated structure. Therefore, the problem that the balance hole is difficult to be formed in the periphery of the fan is perfectly solved, no additional independent part is added, the integrity of the fan is guaranteed, and the balance performance is improved. Meanwhile, the air outlet is designed to be of a hyperbolic structure, the fan blades can be made to be higher and wider, and therefore the air inlet amount is increased. The area, close to the air outlet, of the tail end of the fan blade is thinner to form the flow guide groove, the size of the air outlet can be increased, air resistance is reduced, and the air volume is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and in particular to a fan / blower which is mainly used for heat dissipation and ventilation in products such as power supplies, industrial control, servers, game consoles, and computer cases. Background Art

[0002] Fans (also called blowers, wind wheels, etc.) are used in many products, such as power supplies, industrial control, servers, industrial equipment, charging piles, computer cases, household appliances, etc., and their main function is to dissipate heat and ventilate. Balance performance is one of the most important performance indicators of fans, which is related to the service life, noise, operation stability and other performance of the fan. At present, many fans will improve the balance performance by setting balance holes to fill the holes, but most of the traditional balance holes are set on the motor shell of the fan, that is, closer to the center of the wind wheel, or as disclosed in patent CN207762015U, the fully automatic dynamic balancing correction rotor blades. According to the principles of centrifugal mechanics, the farther the balance hole is from the center of the fan and the double or multi-layer balance effect is, the better, and the closer the balance hole is, the worse the effect is. In addition, the balance hole is closer to the center and it will affect the size of the fan blades, resulting in the fan blades cannot be made wider, affecting the air intake.

[0003] The reason why the balancing hole can only be set at a position close to the center of the fan even though it is known that the farther the balancing hole is, the better, is because the structure of the fan itself limits the setting of the balancing hole. The outside is the space for the blades to rotate, and the balancing hole cannot be set, and the balancing hole cannot be opened on the blades. Although there are a few fans that set the balancing hole far away from the center, such as a wind wheel balancing structure disclosed in patent CN218325087U, but for the same reason mentioned above, it is necessary to make an independent balancing ring, and then set the balancing hole on the balancing ring. This will firstly destroy the integrity of the fan, affecting the balancing performance and wind resistance performance; secondly, it will make the structure more complicated, increase the cost and difficulty of assembly. In addition, since the overall thickness of the blades of existing fans has basically reached the extreme and cannot be made thinner, it is also difficult to increase the air volume. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a wind wheel with a simple structure, a more reasonable design, and the ability to make balancing holes on the periphery of the wind wheel without adding additional parts to improve the balancing performance and to increase the wind volume by improving the local structure in view of the shortcomings of the prior art.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions: a wind wheel with an improved balancing structure to increase the wind volume, comprising fan blades, a center surrounded by the fan blades having an air inlet, an end between the fan blades close to the air inlet is formed with an air inlet, an end between the fan blades away from the air inlet is formed with an air outlet, the air outlet is connected with the air inlet through the air inlet, and is characterized in that: the upper and lower edges of the fan wheel are respectively connected with an upper plate and a bottom plate, both of which are annular structures, and the air inlet is located in the central area of ​​the bottom plate; the outer edges of the upper plate and the bottom plate extend outward to form double or multiple circles of balancing wings, and a plurality of balancing holes are evenly arranged on the upper and lower balancing wings, and the balancing holes are aligned one by one up and down; the upper balancing wing and the upper plate are an integrated structure, the lower balancing wing and the bottom plate are an integrated structure, the upper plate and the bottom plate are an integrated structure with the fan blades, and are made by one-piece molding.

[0006] Preferably, the balancing hole is in the shape of a trumpet hole, and the aperture at the end facing the air outlet is smaller than the aperture at the end facing away from the air outlet, so as to minimize the friction force caused by the opening at the air outlet on the air outlet.

[0007] Furthermore, the outer edges of the upper and lower balancing wings are flush with the outer edges of the fan blades, so that the balancing hole is located on the upper and lower sides of the air outlet, ensuring that the upper and lower sides of the air outlet remain balanced.

[0008] Furthermore, the balancing holes are formed in a plurality of groups on the balancing wing, the number of balancing holes in each group may be the same, and each air outlet corresponds to a group of balancing holes.

[0009] Furthermore, a guide groove is provided on the inner surface of each blade end near the air outlet, and the guide groove extends to the outer edge of the blade, and the thickness of the blade where the guide groove is located is less than the thickness of other parts of the blade. Due to the concave structure of the guide groove, the friction force is reduced when the air flows to the position of the guide groove, and the space of the air outlet is increased, thereby increasing the air output.

[0010] Furthermore, a circle of upwardly protruding docking rings is arranged along the inner edge of the upper plate, and the docking rings are used to abut against the air guide ring of the fan.

[0011] Furthermore, an installation avoidance groove is respectively arranged at a position on the upper edge of each fan blade close to the air guide ring of the docking ring, and the lower edge of the air guide ring is inserted into the installation avoidance groove.

[0012] Furthermore, the highest point of the upper edge of each fan blade is flush with the surface of the upper plate, and each mounting slot is lower than the position of the upper plate. This has the effect of maximizing the width of the fan blade, thereby increasing the air inlet and the air intake. Traditionally, since the balancing hole is set close to the widest position of the fan blade, the width of the fan blade can only be made smaller to avoid the position.

[0013] Preferably, the balancing holes adopt an inner and outer double-layer or multi-layer hole position complementary structure, that is, the positions of the inner and outer balancing holes are staggered.

[0014] The utility model forms a balance wing by extending a portion of the upper plate and the bottom plate connected to the upper and lower parts of the fan blades outward, and sets a balance hole on the balance wing. This perfectly solves the problem that the balance hole is difficult to set at the periphery of the fan, and no additional independent parts are added, thereby ensuring the integrity of the fan and improving the balance performance. The balance performance test only needs one time to be completed, saving test time and cost. At the same time, because the balance hole is moved to the periphery, the factors that limit the size of the air inlet hole are eliminated, and the air outlet is designed as a hyperbolic structure, so that the fan blades can be made higher and wider, and the air intake volume is increased. In addition, by making an area near the air outlet at the end of the fan blade thinner to form a guide groove, not only the size of the air outlet can be increased, but also the wind resistance can be reduced, and with wider fan blades, the air volume can be significantly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional structural diagram of the utility model;

[0016] Figure 2 It is a three-dimensional structural diagram of the utility model from another angle;

[0017] Figure 3 This is a side structural diagram of the utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the utility model.

[0019] In the figure, 1 is a fan blade, 11 is a guide groove, 12 is a wind guide installation avoidance groove, 2 is a chassis, 3 is an upper plate, 4 is a motor hole, 5 is a balance wing, 51 is a balance hole, 6 is an air inlet, 7 is an air outlet, and 8 is a docking ring. DETAILED DESCRIPTION

[0020] In this embodiment, refer to Figure 1-Figure 4 The wind wheel with improved balancing structure to increase wind volume includes 7 blades 1, a motor hole 4 is arranged in the center surrounded by the blades 1, 7 air inlets 6 are formed at one end of the blades 1 close to the motor hole 4, 7 air outlets 7 are formed at one end of the blades 1 away from the motor hole 4, and the air outlets 7 are connected with the chassis 2 through the air inlets 6; the upper and lower edges of the blades 1 are respectively connected with the upper plate 3 and the chassis 2, both of which are annular structures, and the air inlet 6 is located in the central area of ​​the chassis 2; the outer edges of the upper plate 3 and the chassis 2 extend outward to form a circle of balancing wings 5, and a plurality of balancing holes 51 are evenly arranged on the upper and lower balancing wings 5, and each balancing hole 51 is aligned one by one; the upper balancing wing 5 is an integral structure with the upper plate 3, the lower balancing wing 5 is an integral structure with the chassis 2, the upper plate 3 and the chassis 2 are an integral structure with the blades 1, and can be made of plastic material by integral molding.

[0021] The balancing hole 51 is in the shape of a trumpet hole, and the aperture of the end facing the air outlet 7 is smaller than the aperture of the end facing away from the air outlet 7. This can minimize the friction caused by the opening at the air outlet 7 on the air outlet, thereby improving the smoothness of the air outlet and facilitating increasing the air volume.

[0022] The outer edges of the upper and lower balance wings 5 ​​are flush with the outer edges of the blades 1, so that the balance hole 51 is located at the upper and lower sides of the air outlet 7, ensuring that the upper and lower sides of the air outlet 7 are balanced. The air outlet is a hyperbolic structure, with the upper edge curved upward and the lower edge curved downward.

[0023] The balancing holes 51 are formed in 7 groups on the balancing wing 5 (the same number as the fan blades 1 ), and the number of balancing holes 51 in each group can be the same, for example, 10, and each air outlet 7 corresponds to a group of balancing holes 51 .

[0024] A guide groove 11 is provided on the inner surface of the end of each blade 1 near the air outlet 7. The guide groove 11 extends to the outer edge of the blade 1 to form a notch shape. The thickness of the portion of the blade 1 where the guide groove 11 is located is less than the thickness of other portions of the blade 1. The guide groove 11 is a plurality of groove structures. Due to the concave structure of the guide groove 11, when the air flows to the position of the guide groove 11, the friction force is reduced, making the air outlet smoother, and at the same time increasing the size of the air outlet 7, thereby increasing the air output.

[0025] A circle of upwardly protruding docking ring 8 is arranged along the inner edge of the upper plate 3 , and the docking ring 8 abuts against the air guide ring of the fan, and air is sucked in from the air inlet 6 through the air guide ring.

[0026] An air guide installation avoidance groove 12 is provided at the upper edge of each fan blade 1 near the docking ring 8, and the lower edge of the air guide ring is inserted into the air guide installation avoidance groove 12. This sunken installation structure can ensure that the fan as a whole can maintain its original size after widening the fan blade 1.

[0027] The highest point of the upper edge of each fan blade 1 is substantially flush with the surface of the upper plate 3, and each wind guide installation avoidance groove 12 is lower than the position of the upper plate 3, which has the effect of maximizing the width of the fan blade 1, thereby increasing the air inlet 6 and the air intake volume. Traditionally, since the balancing hole is set near the widest position of the fan blade, the width of the fan blade can only be made smaller to avoid the position.

[0028] The balancing holes 51 adopt an inner and outer double-layer or multi-layer hole complementary structure, and the positions of the inner and outer double-layer or multi-layer balancing holes 51 are staggered, that is, the gap between the inner circle balancing holes 51 and the outer circle balancing holes 51, and vice versa. The use of a double-layer or multi-layer balancing hole structure can further improve the balancing effect.

[0029] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A wind wheel with an improved balance structure to increase the air volume, comprising blades, a center surrounded by the blades having an air inlet, an end between the blades close to the air inlet forming an air inlet, an end between the blades away from the air inlet forming an air outlet, the air outlet being connected to the air inlet through the air inlet, characterized in that: The upper and lower edges of the fan blades are respectively connected to the upper plate and the chassis. Both the upper plate and the chassis are annular structures, and the air inlet is located in the central area of ​​the chassis. The outer edges of the upper plate and the chassis extend outward to form balance wings. A number of balance holes are evenly arranged on the upper and lower balance wings, so that precise balance can be achieved, and the balance holes are aligned one by one up and down. The upper balance wing is an integrated structure with the upper plate, and the lower balance wing is an integrated structure with the chassis. The upper plate, the chassis and the fan blades are an integrated structure, and are made of one-piece molding.

2. The wind wheel with improved balance structure to increase wind volume according to claim 1, characterized in that: The balancing hole is in the shape of a trumpet hole, and the hole diameter at one end facing the air outlet is smaller than the hole diameter at the end facing away from the air outlet.

3. The wind wheel with improved balance structure to increase wind volume according to claim 1, characterized in that: The outer edges of the upper and lower balance wings are flush with the outer edges of the fan blades, so that the balance hole is located on the upper and lower sides of the air outlet.

4. The wind wheel with improved balance structure to increase wind volume according to claim 1, characterized in that: The balancing holes are formed in a plurality of groups on the balancing wing, the number of balancing holes in each group is the same, and each air outlet corresponds to a group of balancing holes.

5. The wind wheel with improved balance structure to increase wind volume according to claim 1, characterized in that: A guide groove is arranged on the inner surface of each blade end near the air outlet, and the guide groove extends to the outer edge of the blade. The thickness of the blade where the guide groove is located is smaller than the thickness of other parts of the blade. The air outlet is a hyperbolic structure.

6. The wind wheel with improved balance structure to increase wind volume according to claim 1, characterized in that: A circle of upwardly protruding docking ring is arranged along the inner edge of the upper plate, and the docking ring abuts against the air guide ring of the fan.

7. The wind wheel with improved balance structure to increase wind volume according to claim 6, characterized in that: An installation avoidance groove is respectively arranged at a position of the upper edge of each fan blade close to the air guide ring of the docking ring, and the lower edge of the air guide ring is inserted into the installation avoidance groove.

8. The wind wheel with improved balance structure to increase wind volume according to claim 7, characterized in that: The highest point of the upper edge of each fan blade is flush with the surface of the upper plate, and each mounting groove is lower than the position of the upper plate.

9. The wind wheel with improved balance structure for increasing wind volume according to any one of claims 1 to 8, characterized in that: The balancing hole adopts an inner and outer double-layer or multi-layer hole complementary structure.

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