Fan

Abstract

The utility model relates to the technical field of fans, and provides a fan which comprises a fan shell, a motor and an impeller. A motor is installed in the fan shell, and an impeller is arranged on the motor. A motor mounting part is arranged in the center of the fan shell, and a bearing mounting part is arranged in the center of the motor mounting part; a circular wall part is arranged on the periphery of the motor mounting part; the motor is provided with a stator and a rotor; the stator comprises a stator core and a protective cover; the stator core sleeves the outer wall of the bearing mounting part; an iron core insulating cover covers the stator iron core; the outer side of the stator core is covered with a protective cover; the upper end of the protective cover is connected with the upper end of the iron core insulating cover in a hot melting manner; and the lower end of the protective cover is connected with the top end of the circular wall part of the motor mounting part in a hot melting manner. Foreign matters such as dust and water can be prevented from entering the motor, the waterproof performance of the motor is ensured, and the waterproof characteristic of the fan is further improved.

Description

Technical Field

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

[0002] Outdoor devices such as photovoltaic power generation equipment need to be equipped with fans for heat dissipation. Fans for outdoor device heat dissipation have relevant waterproof requirements. With the upgrade of equipment and the change of the use environment, the waterproof requirements for fans are gradually increasing.

[0003] Currently, as a common treatment method, waterproof treatment is carried out on the motor part of the fan. For example, applying waterproof glue to the circuit board of the motor and insulating the stator part of the motor will improve the waterproof effect of the fan motor.

[0004] Among many treatment methods, by setting a protective cover on the motor stator and injecting glue into the protective cover, the motor stator after injection is wrapped in the glue to achieve the waterproof effect of the motor. However, in the existing fans, no special waterproof treatment is carried out on the connection part between the protective cover and the fan housing. Once water enters the stator part of the motor, it will cause the waterproof function of the motor to fail. When the waterproof function of the motor fails, it will cause the heat dissipation function of the fan to fail, and in severe cases, it will cause the equipment equipped with this fan to malfunction. Summary of the Utility Model

[0005] The utility model mainly solves the technical problem that in the existing fans, no special waterproof treatment is carried out on the connection part between the protective cover and the fan housing. Once water enters the stator part of the motor, it will cause the waterproof function of the motor to fail, and proposes a fan to block foreign objects such as dust and water from entering the motor interior, ensure the waterproofness of the motor, and thereby improve the waterproof characteristics of the fan.

[0006] The utility model provides a fan, including: a fan housing, a motor, and an impeller; the motor is installed inside the fan housing, and the impeller is arranged on the motor.

[0007] A motor installation part is arranged at the center of the fan housing, and a bearing installation part is arranged at the center of the motor installation part; a circular wall part is arranged on the outer periphery of the motor installation part.

[0008] The motor has a stator and a rotor.

[0009] The stator includes: a stator core and a protective cover; the stator core is sleeved on the outer wall of the bearing installation part; a core insulating cover is covered on the stator core; a protective cover is covered outside the stator core.

[0010] The upper end of the protective cover is connected to the upper end of the core insulating cover in a hot melting manner.

[0011] The lower end of the protective cover is connected to the top end of the circular wall portion of the motor mounting portion by hot melting.

[0012] Preferably, the upper end of the protective cover is connected to the upper end of the bearing mounting portion by hot melting.

[0013] Preferably, the protective cover has a cover body portion;

[0014] A circular hole is formed at the top end of the cover body portion, and the circular hole has an axially extending first portion;

[0015] The bottom end of the cover body portion has a radially extending second portion.

[0016] Preferably, a plurality of protruding ribs are uniformly distributed on the inner wall of the cover body portion.

[0017] Preferably, the rotor includes: a rotor frame and rotor magnets;

[0018] The rotor frame is disposed outside the protective cover, rotor magnets are disposed on the inner circumferential side of the rotor frame, and the rotor magnets are located on the outer circumferential side of the protective cover.

[0019] Preferably, the motor further has a rotating shaft;

[0020] The rotating shaft is supported by a bearing installed in the bearing mounting portion to be rotatable.

[0021] Preferably, a first protrusion is provided at the top end of the circular wall portion; a first stepped portion is formed on the outer side of the first protrusion.

[0022] Preferably, the impeller has a cup portion and a plurality of blades uniformly distributed on the outer circumference of the cup portion;

[0023] A second protrusion is circumferentially provided at the bottom end of the cup portion, and a second stepped portion is formed on the inner side of the second protrusion.

[0024] Preferably, the first protrusion is connected to the bottom end of the protective cover, and the second protrusion of the impeller cup portion extends toward the first stepped portion of the circular wall portion.

[0025] Preferably, the outer side of the fan housing has a fan outer frame;

[0026] A plurality of rib portions are uniformly distributed between the fan outer frame and the motor mounting portion.

[0027] A fan provided by the present utility model has a protective cover covering above the stator core and the circuit board. The protective cover is filled with waterproof glue, and the protective cover is connected to the iron core insulating cover, the circular wall portion, and the bearing mounting portion by a hot melting method, which can make the structure of the protective cover stable, protect the stator part, and enhance the waterproof effect of the motor. At the same time, the present utility model sets the part where the protective cover is connected to the fan housing and the impeller into a labyrinth structure, which can block foreign matters such as dust and water from entering the interior of the motor, further improve the consistency of stator potting, ensure the waterproofness of the motor, and thus improve the waterproof characteristics of the fan and the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. 6 is a front structural schematic diagram of the fan provided by the present utility model;

[0029] Figure 2 FIG. 10 is a rear structural schematic diagram of the fan provided by the present utility model;

[0030] Figure 3 FIG. 14 is a structural schematic diagram of the fan provided by the present utility model with the impeller hidden;

[0031] Figure 4 FIG. 18 is an axial sectional view of the fan provided by the present utility model;

[0032] Figure 5 FIG. 22 is a structural schematic diagram of the fan housing provided by the present utility model;

[0033] Figure 6 FIG. 26 is an internal structural schematic diagram of the motor provided by the present utility model;

[0034] Figure 7 FIG. 30 is a structural schematic diagram of the protective cover provided by the present utility model;

[0035] Figure 8 FIG. 34 is a structural schematic diagram of the impeller provided by the present utility model.

[0036] Reference numerals: 1, fan housing; 2, motor; 3, impeller; 101, fan outer frame; 102, motor mounting portion; 103, bearing mounting portion; 104, first protrusion; 105, rib portion; 106, circular wall portion; 201, rotor frame; 202, rotor magnet; 203, protective cover; 204, stator core; 205, rotating shaft; 206, iron core insulating cover; 207, circuit board; 208, coil; 2031, cover body portion; 2032, first extension portion; 2033, second extension portion; 2034, protruding rib; 301, cup portion; 302, blade; 303, second protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the content are shown in the drawings.

[0038] As Figure 1-4 shown, a fan provided by an embodiment of the present utility model includes: a fan housing 1, a motor 2, and an impeller 3; the motor 2 is installed inside the fan housing 1, and the impeller 3 is arranged on the motor 2.

[0039] As Figure 5 shown, a motor mounting portion 102 is provided at the center of the fan housing 1, and a bearing mounting portion 103 is provided at the center of the motor mounting portion 102; a circular wall portion 106 is provided on the outer periphery of the motor mounting portion 102. The outer side of the fan housing 1 has a fan outer frame 101; a plurality of rib portions 105 are evenly distributed between the fan outer frame 101 and the motor mounting portion 102. A first protrusion 104 is provided at the top of the circular wall portion 106; a first stepped portion is formed on the outer side of the first protrusion 104.

[0040] As Figure 6 shown, the motor 2 has a stator and a rotor. The stator includes: a stator core 204, a circuit board 207, and a protective cover 203; the stator core 204 is sleeved on the outer wall of the bearing mounting portion 103; a core insulating cover 206 is covered on the stator core 204; the protective cover 203 is covered outside the stator core 204. A plurality of tooth portions are evenly distributed on the radial outer side of the stator core 204, and tooth end portions are provided on the outer sides of the tooth portions. The core insulating cover 206 covers the upper and lower parts of the stator core 204 and does not cover the arc-shaped outer wall of the tooth end portions, and the coil 208 is wound at the position of the core insulating cover 206 on the tooth portions.

[0041] As Figure 7 shown, the protective cover 203 has a cover body portion 2031; a circular hole is opened at the top of the cover body portion 2031, and the circular hole has an axial first extension portion 2032; the bottom end of the cover body portion 2031 has a radial second extension portion 2033. A plurality of protruding ribs 2034 are evenly distributed on the inner wall of the cover body portion 2031. The protruding ribs 2034 are used to abut against the midline of the arc-shaped outer wall of the tooth end portions.

[0042] The upper end of the protective cover 203 (specifically, the position of the first extension portion 2032) is connected to the upper end of the iron core insulating cover 206 by a hot melt method; the lower end of the protective cover 203 (specifically, the outer end of the second extension portion 2033) is connected to the top end of the circular wall portion 106 of the motor mounting portion 102 by a hot melt method. The upper end of the protective cover 203 (specifically, the position of the first extension portion 2032) is connected to the upper end of the bearing mounting portion 103 by a hot melt method. The protective cover 203 covers the stator core 204 and the circuit board 207. The protective cover 203 is filled with waterproof glue. The protective cover 203 is connected to the iron core insulating cover 206, the circular wall portion 106, and the bearing mounting portion 103 by a hot melt method, which can make the structure of the protective cover 203 stable, protect the stator part, and enhance the waterproof effect of the motor 2.

[0043] The rotor includes: a rotor frame 201 and rotor magnets 202; the rotor frame 201 is disposed outside the protective cover 203, rotor magnets 202 are disposed on the inner circumferential side of the rotor frame 201, and the rotor magnets 202 are located on the outer circumferential side of the protective cover 203. The motor 2 further has a rotating shaft 205; the rotating shaft 205 is supported in a rotatable state by bearings installed in the bearing mounting portion 103. The rotating shaft 205 can drive the rotor frame 201 and the rotor magnets 202 to rotate, and the rotor frame 201 is connected to the impeller 3, thereby driving the impeller 3 to rotate.

[0044] As Figure 8 shown, the impeller 3 has a cup portion 301 and a plurality of blades 302 uniformly distributed on the outer circumference of the cup portion 301; a second protrusion 303 is circumferentially provided at the bottom end of the cup portion 301, and a second stepped portion is formed inside the second protrusion 303. The first protrusion 104 is connected to the bottom end of the protective cover 203 (specifically, the outside of the second extension portion 2033), and the second protrusion 303 of the cup portion of the impeller 3 extends toward the first stepped portion of the circular wall portion 106. The impeller 3 can rotate, and the second protrusion 303 does not contact the first stepped portion, but the second protrusion 303 can radially block the first protrusion 104 to form a labyrinth structure.

[0045] In the present utility model, the first protrusion 104 of the circular wall portion 106, the protective cover 203, and the second protrusion 303 of the impeller 3 cooperate with each other to form a labyrinth structure, which can block foreign matters such as dust and water from entering the interior of the motor 2, further improve the consistency of stator potting, ensure the waterproofness of the motor 2, and thus improve the waterproof characteristics of the fan and improve the product quality.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: modifications made to the technical solutions described in the foregoing embodiments, or equivalent replacements of some or all of the technical features therein, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fan, comprising: A fan casing (1), a motor (2) and an impeller (3); the motor (2) is installed in the fan casing (1), and the impeller (3) is arranged on the motor (2); Features: A motor mounting portion (102) is arranged at the center of the fan housing (1), and a bearing mounting portion (103) is arranged at the center of the motor mounting portion (102); a circular wall portion (106) is arranged at the periphery of the motor mounting portion (102); The motor (2) comprises a stator and a rotor; The stator comprises: a stator core (204) and a protective cover (203); the stator core (204) is sleeved on the outer wall of the bearing mounting portion (103); the stator core (204) is covered with a core insulation cover (206); the outer side of the stator core (204) is covered with a protective cover (203); The upper end of the protective cover (203) is connected to the upper end of the core insulation cover (206) by hot melting; The lower end of the protective cover (203) is connected to the top of the circular wall portion (106) of the motor mounting portion (102) by hot melting.

2. The fan according to claim 1, characterized in that The upper end of the protective cover (203) is connected to the upper end of the bearing mounting portion (103) by hot melting.

3. The fan according to claim 1 or 2, characterized in that: The protective cover (203) comprises a cover body (2031); A circular hole is formed at the top end of the cover body (2031), and the circular hole has a first axial extension portion (2032); The bottom end of the cover body (2031) has a radial second extension portion (2033).

4. The fan according to claim 3, characterized in that: A plurality of protruding ribs (2034) are evenly distributed on the inner wall of the cover body (2031).

5. The fan according to claim 1, characterized in that: The rotor comprises: a rotor frame (201) and a rotor magnet (202); The rotor frame (201) is arranged on the outside of the protective cover (203), a rotor magnet (202) is arranged on the circumferential inner side of the rotor frame (201), and the rotor magnet (202) is located on the circumferential outer side of the protective cover (203).

6. The fan according to claim 5, characterized in that: The motor (2) further comprises a rotating shaft (205); The rotating shaft (205) is supported in a rotatable state by a bearing installed in the bearing installation part (103).

7. The fan according to claim 1, characterized in that: A first protrusion (104) is arranged at the top end of the circular wall portion (106); a first step portion is formed on the outer side of the first protrusion (104).

8. The fan according to claim 7, characterized in that: The impeller (3) comprises a cup portion (301) and a plurality of blades (302) evenly distributed on the periphery of the cup portion (301); A second protrusion (303) is circumferentially arranged at the bottom end of the cup portion (301), and a second step portion is formed inside the second protrusion (303).

9. The fan according to claim 8, characterized in that The first protrusion (104) is connected to the bottom end of the protective cover (203), and the second protrusion (303) of the cup portion of the impeller (3) extends toward the first step portion of the circular wall portion (106).

10. The fan according to claim 1, characterized in that The outer side of the fan housing (1) is provided with a fan outer frame (101); A plurality of ribs (105) are evenly distributed between the fan outer frame (101) and the motor mounting portion (102).

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