CN202500803U - Fan capable of stopping immediately - Google Patents

Abstract

The utility model discloses a fan capable of stopping immediately, which is mainly applied to mine operation or civil air defense. The fan comprises a power fan, a fan cover, a bearing base and a driven member, wherein the driven member is rotated by the power fan and comprises a hub and a plurality of blades; at least one magnetic unit is fixed on the blades; two poles of each magnetic unit respectively have a first polarity and a second polarity, and an electromagnet is fixed around the outer sides of the blades and fixed in the fan cover. When harmful gas is detected in the external part, the power supply of the magnet is switched on; when the blade is rotated, the polarity of the electromagnet and the two poles of each magnetic unit respectively generate resistance to prevent the hub from rotating, so that the blades are stopped and rotating immediately is achieved. The fan is simple in fan structure, is assembled with an electromagnetic brake system to effectively prevent the harmful gas from entering.

Description

A fan with vertical stop

technical field

The utility model relates to the technical field of ventilation and air-conditioning engineering, in particular to a fan which utilizes a brake system to realize a vertical stop.

Background technique

At present, the usual fan does not stop immediately. When the fan that does not stop immediately encounters toxic and harmful gases from the outside, it cannot stop the blades immediately, which will cause a small amount of toxic gases to enter, which may cause unnecessary losses. When the fan with vertical stop detects toxic and harmful gases, it can use the electromagnetic braking system to realize the immediate stop, that is, the fan blades stop immediately, which can effectively prevent the poisonous gas from entering. For example, the blower fan described in patent CN 201891630 U can only achieve convenient maintenance, adjustable speed, etc., and cannot meet special requirements such as mine operations.

Contents of the invention

Aiming at the deficiencies in the prior art, the technical problem to be solved by the utility model is: to provide a fan with vertical stop, which can well meet the requirements of mine operation or civil air defense, realize vertical stop, and ensure personnel safety.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A fan with a vertical stop, including a power fan, a fan cover, a bearing seat and a follower, the follower is rotated by the wind force of the power fan, wherein the follower includes a hub and a plurality of blades, and the blades are At least one magnetic unit is fixed, and the two poles of each magnetic unit have first polarity and second polarity respectively; electromagnets are arranged around the outside of the blades, and the electromagnets are fixed in the fan cover.

As a preferred solution of the present invention, the rotation direction of the blade is from the second polarity of the magnetic unit to the first polarity; after the electromagnet is energized, the side close to the blade has the first polarity. When the blade rotates, the first polarity of the electromagnet and the two poles of the magnetic unit respectively generate resistance to prevent the blade from continuing to rotate, so that the blade stops rotating and realizes an immediate stop.

The fan with vertical stop proposed by the utility model is assembled with the electromagnetic brake system to achieve immediate braking when toxic and harmful gases are detected, and the fan stops immediately to effectively prevent the poisonous gas from entering. At the same time, the electromagnetic braking system has the advantages of frictionless braking, that is, there is no friction force and no heat generation during the braking process.

Description of drawings

Fig. 1 is a structural schematic diagram of the fan of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

The utility model provides a fan with a vertical stop, which includes a power fan, a fan cover 5, a bearing seat 4 and a driven part. The driven part is rotated by the wind force of the power fan, and includes a hub 3 and a plurality of blades. At least one magnetic unit 1 is fixed on the blade. Fixed electromagnet 2 in fan cover 5. The two poles of each magnetic unit 1 have the first polarity (such as N pole) and the second polarity (such as S pole); the electromagnet 2 is arranged outside the hub 3, and the side close to the hub 3 has the first pole after electrification Sex (such as N pole). When the blade rotates, the first polarity of the electromagnet 2 and the two poles of each magnetic unit 1 respectively generate resistance to prevent the hub 3 from continuing to rotate. In the figure, the attractive force is recorded as F1, and the repulsive force is recorded as F2.

The working principle of the utility model is: when toxic and harmful gases are detected in the outside world, the power supply of the electromagnet 2 is switched on. During the process of the magnetic unit 1 approaching the electromagnet 2. The N pole of the electromagnet 2 forms a resistance with the N pole of the magnetic unit 1; when the magnetic unit 1 is away from the electromagnet 2, the N pole of the electromagnet 2 forms an attractive force with the S pole of the magnetic unit 1; the above-mentioned resistance, attraction Both hinder the continuous rotation of the blade 3, thereby realizing the vertical stop of the blade.

To sum up, the fan with vertical stop proposed by the utility model realizes a vertical stop when toxic and harmful gases are detected by the electromagnetic braking system.

Claims (2)

1. A fan with a vertical stop, including a power fan, a fan cover (5), a bearing seat (4) and a follower, the follower is rotated by the wind force of the power fan, and it is characterized in that the follower includes a hub part (3) and a plurality of blades, at least one magnetic unit (1) is fixed on the blade, and the two poles of each magnetic unit (1) have the first polarity and the second polarity respectively; There is an electromagnet (2), and the electromagnet (2) is fixed in the fan cover (5). 2. The fan with vertical stop according to claim 1, characterized in that, the rotation direction of the blade is from the second polarity of the magnetic unit (1) to the first polarity; the electromagnet (2) After electrification, the side close to the blade has the first polarity.

Images