Dustproof fan structure

Abstract

The utility model relates to the technical field of fans, and provides a dustproof fan structure which comprises a machine shell, a motor and an impeller. The shell is provided with a shell wall part and a motor mounting part; an annular wall part is arranged on the periphery of the motor mounting part; a circle of bulge is arranged at the top end of the annular wall part; a motor is mounted on the motor mounting part, and an impeller is mounted on the motor; the bottom end of the impeller corresponds to the protrusions of the annular wall part in the vertical direction but does not make contact with the protrusions, and the bottom end of the impeller and the protrusions of the annular wall part are overlapped in the radial direction but do not make contact with each other. And the bulge of the annular wall part adopts a large fillet transition structure. The impeller is provided with an impeller cup part and a plurality of blades evenly distributed on the outer wall of the impeller cup part. And a chamfer is arranged on the outer side of the cup part bottom end of the impeller cup part. Dust and foreign matters can be prevented from entering the motor, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a dust-proof fan structure. Background Art

[0002] Fans for equipment heat dissipation can be installed in various equipment and have diverse usage scenarios. During the use of a fan, an impeller is installed on a fan motor, and the motor is installed on a housing. Since the impeller needs to rotate to achieve the heat dissipation effect, there will be a gap between the impeller and the fan housing to enable the normal operation of the impeller.

[0003] However, due to the gap between the impeller and the housing, dust and foreign objects may be sucked in when the blades guide the air, entering the interior of the motor. Over time, this can cause damage to the motor and fan failure. Summary of the Utility Model

[0004] The utility model mainly solves the technical problem that in the existing technology, there is a gap between the impeller and the housing of the fan, and dust and foreign objects may be sucked in when the blades guide the air, entering the interior of the motor, which can cause damage to the motor and fan failure. The utility model proposes a dust-proof fan structure to prevent dust and foreign objects from entering the interior of the motor and extend the service life of the motor.

[0005] The utility model provides a dust-proof fan structure, including: a housing, a motor, and an impeller;

[0006] The housing has a housing wall portion and a motor mounting portion;

[0007] The outer periphery of the motor mounting portion has an annular wall portion; a circle of protrusions is provided at the top of the annular wall portion;

[0008] The motor is mounted on the motor mounting portion, and the impeller is mounted on the motor;

[0009] The bottom end of the impeller corresponds to the protrusion of the annular wall portion in the up-and-down position but does not contact, and the bottom end of the impeller radially overlaps with the protrusion of the annular wall portion but does not contact.

[0010] Preferably, the protrusion of the annular wall portion adopts a large fillet transition structure.

[0011] Preferably, the impeller has an impeller cup portion and a plurality of blades evenly distributed on the outer wall of the impeller cup portion.

[0012] Preferably, a chamfer is provided on the outer side of the bottom end of the impeller cup portion.

[0013] Preferably, the impeller is mounted on the rotor cage of the motor.

[0014] Preferably, the protrusion of the annular wall portion extends between the bottom end of the cup portion and the rotor cage.

[0015] Preferably, the motor mounting portion is located at the axis of the housing wall portion, and the motor mounting portion is connected to the housing wall portion through a plurality of rib portions.

[0016] Preferably, a bearing sleeve is provided at the center of the motor mounting portion, and the bearing sleeve is used to mount the bearing of the motor.

[0017] A dust-proof fan structure provided by the present utility model is provided with a shield where the housing and the impeller are not in contact, an arc-shaped drainage chamfer is provided on the outer side of the bottom end of the cup portion, and the protrusion adopts a large fillet transition structure, which can change the entry direction of dust and foreign objects without affecting the rotation of the impeller, effectively prevent dust and foreign objects from entering the motor interior, and extend the service life of the motor. Description of the Drawings

[0018] Figure 1 is a structural schematic diagram of the dust-proof fan structure provided by the present utility model Figure 1 ;

[0019] Figure 2 is a structural schematic diagram of the dust-proof fan structure provided by the present utility model Figure 2 ;

[0020] Figure 3 is an internal structural schematic diagram of the dust-proof fan structure provided by the present utility model;

[0021] Figure 4 is a cross-sectional view of the dust-proof fan structure provided by the present utility model;

[0022] Figure 5 is a structural schematic diagram of the housing provided by the present utility model;

[0023] Figure 6 is a structural schematic diagram of the impeller provided by the present utility model.

[0024] Reference Numerals: 1, housing; 2, impeller; 3, motor; 101, housing wall portion; 102, motor mounting portion; 103, annular wall portion; 104, protrusion; 105, rib portion; 106, bearing sleeve; 201, impeller cup portion; 202, blade; 2011, bottom end of the cup portion; 301, rotor cage. Detailed Embodiments

[0025] To make the technical problems solved by the present utility model, the technical solutions adopted, and the achieved technical effects clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings rather than all the content.

[0026] AsFigures 1-4 As shown in the figure, a dust-proof fan structure provided by an embodiment of the present utility model includes: a housing 1, a motor 3, and an impeller 2.

[0027] The housing 1 has a housing wall portion 101 and a motor mounting portion 102; an annular wall portion 103 is provided on the outer periphery of the motor mounting portion 102; a circle of protrusions 104 is provided at the top of the annular wall portion 103. The protrusion 104 of the annular wall portion 103 adopts a large fillet transition structure. Specifically, the root on one side of the protrusion 104 is arc-shaped, and the arc-shaped root faces outward.

[0028] The motor 3 is mounted on the motor mounting portion 102, and the impeller 2 is mounted on the motor 3; specifically, the impeller 2 is mounted on the rotor cage 301 of the motor 3.

[0029] The impeller 2 has an impeller cup portion 201 and a plurality of blades 202 uniformly distributed on the outer wall of the impeller cup portion 201. A chamfer is provided on the outer side of the bottom end 2011 of the cup portion of the impeller cup portion 201. Specifically, the outer side of the bottom end 2011 of the cup portion has an arc-shaped chamfer. In the right-angle structure of the prior art, the wind can directly blow into the gap between the impeller and the housing, while the arc-shaped chamfer of the present utility model is used for drainage, which can change the wind direction, blow the wind that could originally enter the interior of the motor 3 onto the large fillet transition structure of the protrusion 104, and then the protrusion 104 blocks it.

[0030] The bottom end of the impeller 2 corresponds to the protrusion 104 of the annular wall portion 103 in the up-and-down position but does not contact it, and the bottom end of the impeller 2 radially overlaps with the protrusion 104 of the annular wall portion 103 but does not contact it. Specifically, the bottom end 2011 of the cup portion corresponds to the protrusion 104 in the up-and-down position but does not contact it, and the bottom end 2011 of the cup portion radially overlaps with the protrusion 104 but does not contact it.

[0031] The present utility model sets up a non-contact shielding between the housing 1 (protrusion 104) and the impeller 2 (bottom end 2011 of the cup portion), an arc-shaped drainage chamfer is provided on the outer side of the bottom end 2011 of the cup portion, and the protrusion 104 adopts a large fillet transition structure, which can change the entry direction of dust and foreign objects without affecting the rotation of the impeller 2, effectively prevent dust and foreign objects from entering the interior of the motor 3, and extend the service life of the motor 3.

[0032] Furthermore, the protrusion 104 of the annular wall portion 103 extends between the bottom end 2011 of the cup portion and the rotor cage 301, which can further prevent foreign objects from entering the motor 3 and improve the dust-proof effect.

[0033] In addition, the motor mounting portion 102 is located at the axis of the housing wall portion 101, and the motor mounting portion 102 is connected to the housing wall portion 101 through a plurality of rib portions 105. A bearing sleeve 106 is provided at the center of the motor mounting portion 102, and the bearing sleeve 106 is used to mount the bearing of the motor 3. The housing part structure of the present utility model has good stability.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: modifying the technical solutions recorded in the foregoing embodiments, or equivalently replacing some or all of the technical features therein, does not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A dustproof fan structure, characterized in that: include: A casing (1), a motor (3) and an impeller (2); The casing (1) comprises a casing wall portion (101) and a motor mounting portion (102); The outer periphery of the motor mounting portion (102) is provided with an annular wall portion (103); a circle of protrusions (104) is provided at the top end of the annular wall portion (103); The motor mounting portion (102) is mounted with a motor (3), and the motor (3) is mounted with an impeller (2); The bottom end of the impeller (2) corresponds to the protrusion (104) of the annular wall portion (103) in upper and lower positions but does not contact, and the bottom end of the impeller (2) radially overlaps with the protrusion (104) of the annular wall portion (103) but does not contact.

2. The dust-proof fan structure according to claim 1, characterized in that: The protrusion (104) of the annular wall portion (103) adopts a large rounded transition structure.

3. The dust-proof fan structure according to claim 1, characterized in that: The impeller (2) comprises an impeller cup portion (201) and a plurality of blades (202) evenly distributed on the outer wall of the impeller cup portion (201).

4. The dust-proof fan structure according to claim 3, characterized in that: A chamfer is arranged on the outer side of the cup bottom end (2011) of the impeller cup (201).

5. The dust-proof fan structure according to claim 4, characterized in that: The impeller (2) is mounted on the rotor holder (301) of the motor (3).

6. The dust-proof fan structure according to claim 5, characterized in that: The protrusion (104) of the annular wall portion (103) extends between the bottom end (2011) of the cup portion and the rotor retainer (301).

7. The dust-proof fan structure according to claim 1, characterized in that: The motor mounting portion (102) is located at the axis of the casing wall portion (101), and the motor mounting portion (102) and the casing wall portion (101) are connected via a plurality of ribs (105).

8. The dust-proof fan structure according to claim 7, characterized in that: A bearing sleeve (106) is arranged at the center of the motor mounting portion (102), and the bearing sleeve (106) is used to mount the bearing of the motor (3).

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