Side wall type exhaust fan

Abstract

The invention relates to a side wall type exhaust fan. The side wall type exhaust fan comprises an exhaust cylinder and a flange connected to the exterior of the exhaust cylinder in a sleeving mode, and a fixing connecting structure is arranged between the exhaust cylinder and the flange; a rain cover is connected to the end of an air outlet of the exhaust cylinder, the outlet end of the rain cover is downwards arranged, a draught fan and a check valve are arranged in the exhaust cylinder, and the check valve is located at the outlet end of the exhaust cylinder. The installed check valve can prevent external gale from being blown to the interior of a plant, so that the internal environment of the plant is effectively protected; the rain cover can prevent rainwater from entering the plant; in addition, the outlet end of the rain cover is downwards arranged so that the rainwater can be further prevented from entering the side wall type exhaust fan; an insect proof net is arranged so that insects, birds and the like on the outside can be effectively prevented from flying into the plant through the exhaust cylinder.

Description

technical field [0001] The invention relates to a side wall type exhaust fan. Background technique [0002] The exhaust fan is mainly used to discharge the exhaust gas and dust in the workshop, and provide a good working environment for the workers, but the existing exhaust fan structure is too simple, directly open a hole on the wall, and then install a fan in the hole To ventilate and ventilate the working environment, but the existing exhaust fan structure is too simple, directly open a hole on the wall, and then install a fan in the hole to ventilate and ventilate. The past exhaust fans mainly have the following defects; 1. If The fan is not working. When there is wind blowing outside, the outside wind is easy to blow inside. 2. The rain outside is easy to blow inside. 3. The birds and insects outside will fly into the house. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art ...

AI Technical Summary

Problems solved by technology

[0002] The exhaust fan is mainly used to discharge the exhaust gas and dust in the workshop, and provide a good working environment for the workers, but the existing exhaust fan structure is too simple, directly open a hole on the wall, and then install a fan in the hole To ventilate and ventilate the working environment, but the existing exhaust fan structure is too simple, directly open a hole on the wall, and then install a fan in the hole to ventilate and ventilate. The past exhaust fans mainly have the following defects; 1. If The fan does not work. When the wind blows outside, the outside wind is easy to blow inside. 2. The rain outside is easy to blow inside. 3. The birds and insects outside will fly into the house.

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