The present invention relates to a hot air supply device for a vinyl greenhouse. Charcoal powder made of waste wood is recycled and combusted in a vinyl greenhouse or a farm, and combustion heat therefrom is used as a heat source, so indoors can be warmly heated. The hot air supply device of the present invention comprises: a body having a suctioning pan in an air feeding hole of an upper side to feed cold air from the outside, and having a hot air discharge hole in a lower part, wherein a fuel transferring pipe is penetrated and coupled with a cover flange coupled with an opening of one side surface thereof a first chamber interposed in one side of the body, having the fuel transferring pipe inserted therein to feed charcoal powder, including an igniting means for igniting the charcoal powder, and evenly dispersing charcoal powder by a dispersion plate disposed in a front of the fuel transferring pipe a heat exchange pipe body having one end coupled with the first chamber, and performing heat-exchange between combustion heat of the charcoal powder and air in the body a second chamber interposed in the other side of the body, and coupled with the other end of the heat exchange pipe body, wherein waste heat is circulated along a circulation path formed in zigzag by an internal partition to be re-heat-exchanged with air in the body, so heat contact time is extended, and an exhaust hole is formed in the end of the circulation path a storing container containing the charcoal powder, and providing charcoal powder to a fuel transferring pipe through a lower discharge hole and a first compressed air supply pipe coupled with the fuel transferring pipe, and feeding charcoal powder to the first chamber by means of air pressure provided from a compressed air supply means.COPYRIGHT KIPO 2016본 발명은 비닐하우스용 온풍 공급장치에 관한 것으로, 비닐하우스나 농가에서 폐목재로 만든 숯가루를 재활용하여 연소시킴에 따라 이 연소열을 열원으로 하여 실내를 따뜻하게 난방할 수 있게 하기 위해 본 발명은, 상부의 공기유입구에 흡입팬을 구비하여 외부의 찬 공기가 유입되고 하부에 온풍배출구가 구비되며 일 측면의 개구부에 결합되는 커버플랜지에
