RECIRCULATING FAN HEATER Russian patent published in 2020 - IPC E01C23/14 F24H3/04 

FIELD: heating.

SUBSTANCE: invention relates to air heaters and can be used for drying and heating of flat and ribbed surfaces, for example: iron sheets or mesh, asphalt, concrete slabs or paving blocks. Recirculating fan heater has cylindrical housing assembled of sheet steel, closed on end side by cover from steel plate with hole in centre, above which there is an electric motor. On the cover there is a control unit and mount for handles of holders. Inside housing there are: two-way centrifugal impeller fixed on engine shaft, separating plate consisting of disc shaped steel plate with hole at centre with inner diameter d1, having ears protruded beyond outer perimeter with hole in centre and fixed to posts, which are uniformly located in circumferential direction and rigidly fixed to skids, on top there are intermediate bushings, from below, on outer perimeter of separating plate there is an inner wall consisting of cylindrical steel sheet, having on one side truncated cone with cut-outs in places of contact with skids, outer side of wall resting against posts, and from below - into skids. Annular heat and electric heating element (HEHE) is installed in the middle, coaxially to the housing. Base closes the case and consists of a disk-shaped plate with a hole in the centre rigidly fixed to runners out of round reinforcements located centripetal to the axis.

EFFECT: technical result is creation of closed section between heated surface and electric installation and reduction of power consumption due to its circulation.

6 cl, 5 dwg