Fan with double dustproof structures

Abstract

The utility model discloses a fan with a double dustproof structure, which comprises a fan frame, a fan blade, a PCB (printed circuit board) and a motor component, the fan blade and the motor component are mounted on a mounting seat of the fan frame through a shaft core, and the bottom end edge of a HUB part of the fan blade is opposite to the top end edge of the mounting seat; inner and outer circles of flanges protruding towards the fan blades are arranged along the edge of the top end of the mounting seat; an inner ring and an outer ring of flanges protruding towards the mounting base are arranged along the edge of the bottom end of the HUB portion of the fan blade to form a butt joint portion, and the flanges are mutually inserted and close to each other to cover the space between the edge of the bottom end of the HUB portion of the fan blade and the edge of the top end of the mounting base. The upper and lower circles of flanges are mutually inserted and close to each other, so that an inner dustproof wall structure and an outer dustproof wall structure are formed, external impurities such as dust and greasy dirt can be effectively prevented from entering the motor, a good protection effect can be achieved through simple structural improvement, and the service life of the fan is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fans and blowers, in particular to a fan / blower for heat dissipation applied to products such as new energy vehicles, energy storage facilities, industrial equipment, servers, intelligent devices, computer cases, etc. Background Art

[0002] Blowers (or fans) are applied in many products, such as industrial equipment, charging piles, computer cases, household appliances, etc., and their main function is for heat dissipation. A blower generally includes parts such as a fan frame, fan blades, a motor assembly, a PCB board, etc. The fan blades are installed on the motor assembly, and together with the motor assembly, they are installed on the mounting seat of the fan frame through a shaft core. However, since the motor housing of the motor assembly rotates together with the fan blades, and the mounting seat does not rotate, and the fan blades and the fan frame made of plastic material are prone to large deformation. In order to avoid friction between the motor housing and the fan blade HUB when rotating and the mounting seat, a relatively large gap needs to be left between the motor housing and the mounting seat, generally several millimeters, resulting in dust, water and other impurities entering the interior through this gap usually, thereby affecting the service life of the blower. Summary of the Utility Model

[0003] Aiming at the shortcomings existing in the prior art, the utility model provides a blower with a double dust-proof structure, which has a simple structure, more reasonable design and better dust-proof and waterproof effects.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: A blower with a double dust-proof structure includes a fan frame, fan blades, a PCB board and a motor assembly. The fan blades and the motor assembly are installed on the mounting seat of the fan frame through a shaft core together to form a rotatable structure. The bottom edge of the HUB part of the fan blade faces the top edge of the mounting seat. It is characterized in that: There are two inner and outer circles of flanges protruding towards the fan blades along the top edge of the mounting seat. The outer one is the first upper flange, and the inner one is the second upper flange; There are two inner and outer circles of flanges protruding towards the mounting seat along the bottom edge of the HUB part (i.e., the middle circular part of the fan blade) of the fan blade to form a docking part. The outer one is the first lower flange, and the inner one is the second lower flange; The space between the bottom edge of the HUB part of the fan blade and the top edge of the mounting seat is covered by inserting the first upper flange and the second upper flange with the first lower flange and the second lower flange into each other.

[0005] Further, the first lower flange covers the outside of the first upper flange but does not contact the first upper flange, the first upper flange covers the outside of the second lower flange but does not contact the second lower flange, and the second lower flange covers the outside of the second upper flange but does not contact the second upper flange.

[0006] Further, the top end of the mounting base forms a U-shaped groove through the first upper flange and the second upper flange. The bottom end of the HUB part of the wind blade is partitioned with a gap through the first lower flange and the second lower flange. The first upper flange is inserted into the gap, and the second lower flange is inserted into the U-shaped groove.

[0007] Further, the mounting base is made of metal, and the first upper flange and the second upper flange are integrally formed with the main body part of the mounting base.

[0008] Further, the top end of the first upper flange is slightly higher than the top end of the second upper flange to achieve a better dust-proof effect.

[0009] Further, the first lower flange extends outwardly and obliquely from the outer side wall of the HUB part of the wind blade, and the first lower flange and the entire wind blade are integrally made of a metal material or a plastic material.

[0010] In the utility model, by providing inner and outer two-ring flange dust-proof walls at the end of the HUB of the wind blade, and also providing inner and outer two-ring flange dust-proof walls at the end of the fan frame mounting base, the upper and lower two rings of flanges are inserted into each other and approach each other, thereby forming an inner and outer two-layer dust-proof wall structure, which can effectively prevent external impurities such as dust and oil from entering the motor. A good protection effect can be achieved through simple structural improvement, and the service life of the fan can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic cross-sectional structure diagram of the utility model;

[0012] Figure 2 is an exploded schematic diagram of the fan frame and the wind blade of the utility model;

[0013] Figure 3 is Figure 1 an enlarged view of part A of

[0014] In the figure, 1 is the fan frame, 11 is the mounting base, 12 is the first upper flange, 13 is the second upper flange, 14 is the U-shaped groove, 2 is the wind blade, 21 is the HUB part, 22 is the docking part, 23 is the first lower flange, 24 is the second lower flange, and 25 is the gap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] In this embodiment, with reference to Figures 1 - 3, the fan with a double dust-proof structure includes a fan frame 1, a fan blade 2, a PCB board, and a motor assembly. The fan blade 2 and the motor assembly are together mounted on the mounting seat 11 of the fan frame 1 through a shaft core to form a rotatable structure. The bottom edge of the HUB part 21 of the fan blade 2 faces the top edge of the mounting seat 11; there are two inner and outer circles of flanges protruding towards the fan blade 2 along the top edge of the mounting seat 11. The outer one is the first upper flange 12, and the inner one is the second upper flange 13; there are two inner and outer circles of flanges protruding towards the mounting seat 11 along the bottom edge of the HUB part 21 of the fan blade 2 to form a docking part 22. The outer one is the first lower flange 23, and the inner one is the second lower flange 24; the first upper flange 12 and the second upper flange 13 are inserted into the first lower flange 23 and the second lower flange 24 respectively, thus forming two dust-proof structures to cover the space between the bottom edge of the HUB part 21 of the fan blade 2 and the top edge of the mounting seat 11.

[0016] The first lower flange 23 covers the outside of the first upper flange 12 but does not contact the first upper flange 12. The first upper flange 12 covers the outside of the second lower flange 24 but does not contact the second lower flange 24. The second lower flange 24 covers the outside of the second upper flange 13 but does not contact the second upper flange 13, and there is a gap of 0.3 - 0.5 mm left, so that dust can be basically isolated from entering.

[0017] The top of the mounting seat 11 forms a U-shaped groove 14 through the first upper flange 12 and the second upper flange 13. The bottom of the HUB part 21 of the fan blade 2 is separated into a gap 25 by the first lower flange 23 and the second lower flange 24. The first upper flange 12 is inserted into this gap 25, and the second lower flange 24 is inserted into the U-shaped groove 14.

[0018] The mounting seat 11 is made of metal, such as aluminum alloy, and the first upper flange 12 and the second upper flange 13 are integrally formed with the main body part of the mounting seat 11.

[0019] The top of the first upper flange 12 is slightly higher than the top of the second upper flange 13 to achieve a better dust-proof effect.

[0020] The first lower flange 23 extends outwards obliquely from the outer side wall of the HUB part 21 of the fan blade 2, and the first lower flange 23 and the whole fan blade 2 are integrally made of metal material or plastic material.

[0021] The above has made a detailed description of the present utility model. The above description is only the preferred embodiment of the present utility model, and it cannot limit the scope of implementation of the present utility model. That is, all equal changes and modifications made according to the scope of this application should still fall within the scope covered by the present utility model.

Claims

1. A fan with a double dust-proof structure, comprising a fan frame, fan blades, a PCB board and a motor assembly. The fan blades and the motor assembly are together mounted on the mounting seat of the fan frame through a shaft core to form a rotatable structure. The bottom edge of the HUB part of the fan blades faces the top edge of the mounting seat. It is characterized in that: There are two inner and outer circles of flanges protruding towards the impeller along the top edge of the mounting base. The outer one is the first upper flange, and the inner one is the second upper flange; there are two inner and outer circles of flanges protruding towards the mounting base along the bottom edge of the HUB part of the impeller to form a docking part. The outer one is the first lower flange, and the inner one is the second lower flange; the space between the bottom edge of the HUB part of the impeller and the top edge of the mounting base is covered by inserting the first upper flange and the second upper flange into the first lower flange and the second lower flange respectively.

2. The blower with a double dust-proof structure according to claim 1, wherein: The first lower flange covers the outside of the first upper flange but does not contact the first upper flange. The first upper flange covers the outside of the second lower flange but does not contact the second lower flange. The second lower flange covers the outside of the second upper flange but does not contact the second upper flange.

3. The blower with a double dust-proof structure according to claim 1, wherein: The top of the mounting base forms a U-shaped groove through the first upper flange and the second upper flange. The bottom of the HUB part of the impeller is separated by the first lower flange and the second lower flange to have a gap. The first upper flange is inserted into this gap, and the second lower flange is inserted into the U-shaped groove.

4. The fan with a double dust-proof structure according to claim 1, wherein: The mounting base is made of metal, and the first upper flange and the second upper flange are integrally formed with the main body part of the mounting base.

5. The blower with a double dust-proof structure according to claim 3, characterized in that: The top of the first upper flange is slightly higher than the top of the second upper flange.

6. The blower with a double dust-proof structure according to claim 3, characterized in that: The first lower flange extends outwards obliquely from the outer wall of the HUB part of the impeller, and the first lower flange and the whole impeller are integrally made of metal material or plastic material.

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