Fan protection structure and fan

Abstract

The fan protection structure comprises an outer frame, an inverted-U-shaped fixing seat is rotationally installed on the upper portion of the outer frame, fan blades are fixed to the outer surface of the side wall of the inverted-U-shaped fixing seat, the outer frame is surrounded by the side wall of the inverted-U-shaped fixing seat, and a first gap exists between the side wall of the inverted-U-shaped fixing seat and the outer frame; a first gap is formed in the outer frame, a first protrusion is arranged at the end, close to the first gap, of the inverted-U-shaped fixing base, a second protrusion is arranged on the side, close to the first gap, of the outer frame, the first protruding face of the first protrusion and the second protruding face of the second protrusion are oppositely and parallelly arranged, and the distance between the first protruding face and the second protruding face ranges from 0.5 mm to 1.0 mm. The fan protection structure can prevent impurities in airflow from entering the fan when the fan runs, guarantee the stability of the internal structure of the fan and prolong the service life of the fan.

Description

Technical Field

[0001] This utility model belongs to the field of fans, and in particular relates to a fan protection structure and a fan. Background Technology

[0002] A fan is a household appliance used to generate airflow and provide comfortable air circulation. It creates wind by rotating blades or a propeller to push air away or deliver it to a target area. Fans are commonly used to regulate indoor temperature, ventilate, and provide a comfortable airflow environment.

[0003] In traditional hydraulic fan structures, the gap between the lower extension of the fan blades and the outer frame ring is large. When the fan is working, due to the airflow, dust, impurities, electrolytes, small flying insects, etc. in the air can easily enter the fan, which will corrode the silicon steel sheets and coils in the fan stator. Moreover, dust entering the rotor shaft and bearings will mix with the lubricating oil, which will seriously affect the lubrication effect of the shaft and bearings and reduce the service life of the fan. Utility Model Content

[0004] This utility model provides a fan protection structure and a fan that can prevent impurities in the airflow from entering the fan's interior during operation, ensuring the stability of the fan's internal structure and extending the fan's service life.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a fan protection structure, including an outer frame, an inverted U-shaped fixing seat rotatably mounted on the upper part of the outer frame, a fan blade fixed on the outer surface of the side wall of the inverted U-shaped fixing seat, the side wall of the inverted U-shaped fixing seat surrounding the outer frame, and a first gap existing between the side wall of the inverted U-shaped fixing seat and the outer frame.

[0007] The inverted U-shaped fixing seat has a first protrusion at one end near the first gap, and the outer frame has a second protrusion on the side near the first gap. The first protruding surface of the first protrusion and the second protruding surface of the second protrusion are opposite to and parallel to each other, and the distance between the first protruding surface and the second protruding surface is 0.5 to 1.0 mm.

[0008] According to another embodiment of the present invention, the first protrusion is an extension of the side wall of the inverted U-shaped fixing seat, and the angle formed between the first protruding surface and the side wall of the inverted U-shaped fixing seat is 125° to 180°.

[0009] According to another embodiment of the present invention, the second protrusion is staggered with the first protrusion, and the angle between the second protruding surface and the horizontal plane is 35° to 90°.

[0010] According to another embodiment of the utility model, the outer frame bottom rotatory installation has the pivot, the pivot connects the outer frame with the inverted U shape fixed base, the inverted U shape fixed base follows the pivot rotation to drive the fan blade rotation, the pivot outer cover is equipped with the hydraulic bearing, the hydraulic bearing with the inverted U shape fixed base inner wall between existence second gap, the hydraulic bearing side fixedly be provided with stator, the stator top is equipped with insulation frame, the insulation frame part is located in the second gap.

[0011] According to another embodiment of the utility model, the insulation frame extends towards the direction of the second gap and forms a sealing cover, the farthest end of the extension of the sealing cover is 0.5-1.0mm away from the pivot.

[0012] According to another embodiment of the utility model, a first sealing ring is further fixedly arranged on the insulation frame, and the first sealing ring extends towards the inner wall of the inverted U-shaped fixed base.

[0013] According to another embodiment of the utility model, a second sealing ring is fixedly installed on the inner wall of the inverted U-shaped fixed base, the second sealing ring is arranged in parallel with the first sealing ring, and the second sealing ring has a projection area on the first sealing ring, and the distance between the first sealing ring and the second sealing ring is 0.5-1.0mm.

[0014] According to another embodiment of the utility model, a third sealing ring is arranged on the sealing cover, the third sealing ring is arranged in parallel with the first sealing ring and the second sealing ring, and the third sealing ring has a projection area on the first sealing ring or the second sealing ring.

[0015] According to another embodiment of the utility model, a motor is fixed on the inner surface of the side wall of the inverted U-shaped fixed base, and a magnet is fixed on the motor housing.

[0016] In the second aspect, the utility model provides a fan, which comprises the fan protection structure of any one of the first aspect.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] The fan protection structure provided by the utility model sets the first protrusion and the second protrusion on the side wall of the inverted U-shaped fixed base and the outer frame respectively, the two protrusions are close to each other to reduce the gap between the side wall of the inverted U-shaped fixed base and the outer frame, avoid impurities in the airflow from entering the fan, ensure the stable operation of the silicon steel sheet and the coil in the fan stator, the rotor shaft and the bearing, and at the same time, the first plane and the second plane of the first protrusion and the second protrusion are arranged in parallel and maintain a safe distance, so that collision between the first protrusion and the second protrusion is avoided when the fan blade rotates.

[0019] The fan protection structure provided by the utility model is provided with first sealing ring and second sealing ring on the inner wall of the insulation frame and the inverted U-shaped fixing seat, two sealing rings form twice staggered intersection, avoids impurities in airflow from entering into the rotor shaft and bearing, and the sealing cover is arranged on the insulation frame, which further avoids impurities from entering and prevents lubricating oil in the fan from being thrown out. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0021] Figure 1 The fan protection structure sectional view provided by the utility model embodiment;

[0022] Figure 2 The fan blade lower extension and outer frame position structure schematic view of the prior art;

[0023] Figure 3 The A part schematic view in Figure 1

[0024] Figure 4 The fan stator position structure schematic view of the prior art;

[0025] Figure 5 The B part schematic view in Figure 1

[0026] The reference signs in the drawings are as follows:

[0027] 1, outer frame; 11, second protrusion; 111, second protruding surface;

[0028] 2, inverted U-shaped fixing seat; 21, fan blade; 22, first protrusion; 221, first protruding surface; 23, second sealing ring;

[0029] 3, rotating shaft;

[0030] 4, hydraulic bearing;

[0031] 5, baffle;

[0032] 6, stator;

[0033] 7, insulation frame; 71, sealing cover; 72, first sealing ring; 73, third sealing ring;

[0034] 81, motor; 82, magnet. DETAILED DESCRIPTION ​​

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figure 1 As shown, this utility model provides a fan protection structure, including an outer frame 1. An inverted U-shaped fixing seat 2 is rotatably mounted on the upper part of the outer frame 1. A fan blade 21 is fixed on the outer surface of the side wall of the inverted U-shaped fixing seat 2. The side wall of the inverted U-shaped fixing seat 2 surrounds the outer frame 1, and there is a first gap between the side wall of the inverted U-shaped fixing seat 2 and the outer frame 1. A first protrusion 22 is provided at one end of the inverted U-shaped fixing seat 2 near the first gap, and a second protrusion 11 is provided on one side of the outer frame 1 near the first gap. The first protruding surface 221 of the first protrusion 22 and the second protruding surface 111 of the second protrusion 11 are opposite to and parallel to each other. The distance between the first protruding surface 221 and the second protruding surface 111 is 0.5 to 1.0 mm.

[0037] like Figure 2 As shown, the gap between the lower extension of the fan blade and the outer frame ring is large. When the fan is working, due to the airflow, dust, impurities, electrolytes, small flying insects and other contaminants in the air can easily enter the fan, which can lead to corrosion of the silicon steel sheets and coils in the fan stator. Moreover, dust entering the rotor shaft and bearings will mix with the lubricating oil, which will seriously affect the lubrication effect of the shaft and bearings and reduce the service life of the fan.

[0038] This utility model provides a fan protection structure having a first protrusion 22 and a second protrusion 11, such as Figure 3 As shown, when the fan starts working, because the first protrusion 22 and the second protrusion 11 are close to each other and the distance between them is small, the gap between the side wall of the inverted U-shaped fixing seat 2 and the outer frame 1 can be reduced, preventing impurities in the airflow from entering the fan and ensuring the stable operation of the internal structures of the fan; at the same time, the opposing first protruding surface 221 and second protruding surface 111 are controlled to be arranged parallel to each other and maintain a safe distance, ensuring that the first protrusion 22 and the second protrusion 11 will not collide when the fan blade 21 rotates. Preferably, the distance between the first protruding surface 221 and the second protruding surface 111 is 0.5mm.

[0039] In order to facilitate the processing of the first protrusion 22, the first protrusion 22 is arranged as an extension of the side wall of the inverted U-shaped fixing seat 2, and only the protruding side wall of the inverted U-shaped fixing seat 2 needs to be processed when the first protrusion 22 is made, which is simple and convenient for large-scale production. The included angle formed between the first protruding surface 221 and the side wall of the inverted U-shaped fixing seat 2 can be various, for example, the included angle formed between the two is 180°, so that only the inverted U-shaped fixing seat 2 needs to be cut, and the excess part is removed. For example, as shown in Figure 1 , the included angle between the two is 125°, which can optimize the air inlet area and reduce the generation of gas vortex.

[0040] Correspondingly, the second protrusion 11 is arranged staggered with the first protrusion 22, so as to synergize and further increase the path of impurities entering and reduce the entry of impurities. It can be understood that in another embodiment, the second protrusion 11 can be arranged in alignment with the first protrusion 22, at this time, the first protruding surface 221 and the second protruding surface 111 can be arranged in relative parallel, forming an air flow channel, at this time, the shortest distance between the first protruding surface 221 and the second protruding surface 111 is 0.5-1.0mm. As shown in Figure 3 , when the side wall of the inverted U-shaped fixing seat 2 is vertically arranged, the included angle between the second protruding surface 111 and the horizontal plane is 90° different from the included angle formed between the first protruding surface 221 and the side wall of the inverted U-shaped fixing seat 2, and the included angle between the second protruding surface 111 and the horizontal plane is 35°-90°. Preferably, the included angle between the second protruding surface 111 and the horizontal plane is 35°

[0041] Preferably, the outer frame 1 is rotatably installed with a rotating shaft 3 at the bottom, the rotating shaft 3 connects the outer frame 1 and the inverted U-shaped fixing seat 2, the inverted U-shaped fixing seat 2 rotates with the rotating shaft 3, the inverted U-shaped fixing seat 2 is driven to rotate by the rotating shaft 3, thereby driving the fan blade 21 to rotate to generate air flow. The outer periphery of the rotating shaft 3 is installed with a hydraulic bearing 4, the inner part of the outer frame 1 is installed with a baffle 5, the baffle 5 is pressed to the outer side of the hydraulic bearing 4, and the baffle 5 and the inner wall of the inverted U-shaped fixing seat 2 have a second gap.

[0042] As shown in Figure 4 , the open structure between the hydraulic bearing and the inverted U-shaped fixing seat 2, which leads to the impurities in the air flow easily entering the rotor shaft and the bearing, affecting the lubrication effect of the shaft and the bearing, and making the fan rotating structure run not smoothly.

[0043] In order to realize the electrical insulation to ensure the safety of the fan in use, the baffle 5 is fixedly provided with a stator 6 at the side, the stator 6 is installed with an insulation frame 7 at the top, the insulation frame 7 can isolate the stator 6 from the motor shell and other metal parts to maintain the stable operation of the electric fan. At the same time, the insulation frame 7 can support and accurately position the stator 6, improve the uniformity of the magnetic field inside the fan, and maintain the smooth output of the electromagnetic torque.

[0044] As shown in Figure 5As shown, in order to avoid impurities in the airflow into the rotor shaft and bearing, the insulating frame 7 extends a sealing cover 71 towards the direction of the second gap, and the size of the second gap is reduced through the sealing cover 71, and the lubricating oil inside the fan can also be prevented from being thrown out. In order to facilitate the sealing cover 71 to be mass-produced, the extension length of the sealing cover 71 is limited, and specifically, the distance between the top end of the sealing cover 71 and the rotating shaft 3 is 0.5-1.0 mm, and preferably, the distance between the top end of the sealing cover 71 and the rotating shaft 3 is 0.7 mm.

[0045] Further, the first sealing ring 72 is fixedly arranged on the insulating frame 7, the first sealing ring 72 extends towards the inner wall of the inverted U-shaped fixing seat 2, and the first sealing ring 72 is arranged in the region inside the hydraulic bearing 4 and in communication with the airflow, so as to block the impurities and prevent the lubricating oil inside the fan from being thrown out.

[0046] It is worth noting that the second sealing ring 23 is fixedly installed on the inner wall of the inverted U-shaped fixing seat 2, the second sealing ring 23 is arranged in parallel with the first sealing ring 72, and the second sealing ring 23 has a projection area on the first sealing ring 72 to realize the two-time staggered intersection of the first sealing ring 72 and the second sealing ring 23, further avoiding the impurities from entering the inside of the hydraulic bearing 4, and in order to improve the safety, the distance between the first sealing ring 72 and the second sealing ring 23 is 0.5-1.0 mm, and preferably, the distance between the first sealing ring 72 and the second sealing ring 23 is 1 mm.

[0047] In order to increase the effect of blocking dust on the second gap, the third sealing ring 73 is arranged on the sealing cover 71, the third sealing ring 73 is arranged in parallel with the first sealing ring 72 and the second sealing ring 23, so as to realize multiple sealing protection, the third sealing ring 73 has a projection area on the first sealing ring 72 or the second sealing ring 23, so as to form an interleaved structure to ensure that the three sealing rings are matched in space position to block impurities and dust, further providing sealing reliability of the sealing ring, and maintaining a stable operating environment inside the fan.

[0048] The inverted U-shaped fixing seat 2 and the fan blade 21 are rotated through the structure as shown. Figure 1 As shown, the motor 81 is fixed on the inner surface of the side wall of the inverted U-shaped fixing seat 2, the magnet 82 is fixed on the shell of the motor 81, the stator 6 generates a rotating magnetic field after being electrified, and the rotating magnetic field interacts with the inherent magnetic field of the magnet 82, and the rotation of the fan blade 21 is realized by the synchronous traction between the two magnetic fields.

[0049] In a second aspect, the utility model also provides a fan, since the fan includes the fan protection structure of any one of the above, therefore the fan can avoid impurities in the airflow from entering the inside, guarantee the stability of the internal structure, and prolong the service life.

[0050] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be encompassed within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A fan guard structure, characterized by, Includes an outer frame, an inverted U-shaped fixing seat is rotatably mounted on the upper part of the outer frame, a fan blade is fixed on the outer surface of the side wall of the inverted U-shaped fixing seat, the side wall of the inverted U-shaped fixing seat surrounds the outer frame, and there is a first gap between the side wall of the inverted U-shaped fixing seat and the outer frame; The inverted U-shaped fixing seat has a first protrusion at one end near the first gap, and the outer frame has a second protrusion on the side near the first gap. The first protruding surface of the first protrusion and the second protruding surface of the second protrusion are opposite to and parallel to each other, and the distance between the first protruding surface and the second protruding surface is 0.5 to 1.0 mm.

2. The fan guard structure of claim 1, wherein, The first protrusion is an extension of the side wall of the inverted U-shaped fixing seat, and the angle formed between the first protruding surface and the side wall of the inverted U-shaped fixing seat is 125° to 180°.

3. The fan guard structure of claim 1, wherein, The second protrusion is staggered with the first protrusion, and the angle between the second protruding surface and the horizontal plane is 35° to 90°.

4. The fan guard structure of claim 1, wherein, A rotating shaft is rotatably mounted on the bottom of the outer frame. The rotating shaft connects the outer frame and the inverted U-shaped fixing seat. The inverted U-shaped fixing seat rotates with the rotating shaft to drive the fan blades to rotate. A hydraulic bearing is installed on the outer sleeve of the rotating shaft. There is a second gap between the hydraulic bearing and the inner wall of the inverted U-shaped fixing seat. A stator is fixedly mounted on the side of the hydraulic bearing. An insulating frame is installed on the top of the stator. The insulating frame is partially located in the second gap.

5. The fan guard structure of claim 4, wherein, The insulating frame extends toward the second gap to form a sealing cover, and the distance between the farthest end of the sealing cover and the rotating shaft is 0.5 to 1.0 mm.

6. The fan guard structure of claim 5, wherein, A first sealing ring is also fixedly installed on the insulating frame, and the first sealing ring extends toward the inner wall of the inverted U-shaped fixing seat.

7. The fan guard structure of claim 6, wherein, A second sealing ring is fixedly installed on the inner wall of the inverted U-shaped fixing seat. The second sealing ring is arranged parallel to the first sealing ring, and the second sealing ring has a projection area on the first sealing ring. The distance between the first sealing ring and the second sealing ring is 0.5 to 1.0 mm.

8. The fan guard structure of claim 7, wherein, The sealing cover is provided with a third sealing ring, which is arranged parallel to the first sealing ring and the second sealing ring, and the third sealing ring has a projected area on the first sealing ring or the second sealing ring.

9. The fan guard structure of claim 1, wherein, A motor is fixed to the inner surface of the side wall of the inverted U-shaped fixing base, and a magnet is fixed to the motor housing.

10. A fan characterized by, Includes the fan protection structure as described in any one of claims 1 to 9.

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