Adjustable roof ventilator

Abstract

The invention discloses an adjustable roof ventilator. A round ventilation board, a rotating rack and a servomotor are arranged in a base; the outer wall of the round ventilation board is fixed to the inner wall of the base; the rotating rack is arranged under the round ventilation board; the rotating shaft of the servomotor sequentially penetrates the rotating rack and the round ventilation board from the bottom up and extends out of the round ventilation board; a gear fixed on the rotating shaft is meshed with an internal gear fixed in the central through hole of the rotating rack; the upper part of the rotating shaft is fixed into the inner ring of a bearing fixed in the central hole of the round ventilation board; a ring-shaped groove is formed in the outer wall of the part, which extends out of the round ventilation board, of the rotating shaft; and a fixed block is inserted in the ring-shaped groove and fixed on the round ventilation board and presses the top surface of the bearing. The adjustable roof ventilator can completely seal an air inlet, thereby preventing rain water and other foreign substances from entering a room or entering an air duct via the room, and avoiding the phenomenon that foreign substances flying into the air duct to damage an impeller or be thrown out by the impeller to cause safety accidents.

Description

Technical field: [0001] The invention relates to the technical field of ventilators, in particular to an adjustable roof ventilator. Background technique: [0002] Existing roof ventilators are composed of wind caps, blowers, bases, motors and impellers. The position of the air outlet of the fan base is easily blocked by sundries or sundries fly into the fan, and the sundries that fly into the roof fan are easily damaged. The impeller may be thrown out by the impeller, which is easy to injure people and cause safety accidents. [0003] When the ventilator is not in use, outdoor rainwater, dust, birds, etc. will enter the interior of the ventilator through the air inlet of the ventilator, and finally enter the room from the passage. The existing roof ventilator only sets some louvers at the fan base to prevent The entry of sundries, but it does not have a complete sealing device to prevent the entry of dust, rain, etc. Invention content: [0004] The purpose of the presen...

AI Technical Summary

Problems solved by technology

[0002] Existing roof ventilators are composed of wind caps, blowers, bases, motors and impellers. The position of the air outlet of the fan base is easily blocked by sundries or sundries fly into the fan, and the sundries that fly into the roof fan are easily damaged. The impeller may be thrown out by the impeller, which is easy to injure people and cause safety accidents

[0003] When the ventilator is not in use, outdoor rainwater, dust, birds, etc. will enter the interior of the ventilator through the air inlet of the ventilator, and finally enter the room from the passage. The existing roof ventilator is only provided with some louvers at the fan base to prevent debris enters, but it does not have a complete sealing device to prevent the entry of dust, rain, etc.

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