FLAMELESS INFRA-RED HEATER Russian patent published in 2009 - IPC F23D14/12 

FIELD: heating.

SUBSTANCE: invention relates to heating devices with temperature radiators being heated by fuel and air mixture burning in flameless mode for heating mainly road covering during maintenance operations. The flameless infra-red heater of road covering includes enclosed radiating perforated panel with through channels. The panel is mounted in the housing and made of refractory ceramics. From the outside, the panel is protected with refractory mesh. The heater also includes injector linked with gas balloon and air intake. Besides, together with the inner cavity, the radiating refractory panel forms a working chamber. There is a distributor of gas and air mixture. The radiating panel is installed in the lower part of the housing and directed to the road covering when it is in working position. The injector with air intake is represented with common injection and mixing unit being installed outside the housing and shifted with regard to its centre and connected with pipeline body. The pipeline is introduced into the housing in the centre of the upper surface and ends up with nozzle projected into the working chamber. The air and gas distributor is made in the form two metal plates of different length. The plates are fixed to the inner surface of the housing from the opposite sides with regard to the free edges of the plates being one above the other and overlapping the next one along the whole length. The plates overlap the working chamber by the cross section area. Besides, the short metal plate is installed close to the radiating perforated panel. The long metal plate is tilted to the side of radiating perforated panel. There are gaps between the long metal plate and nozzle from the one panel side and short metal plate from the other panel side. There is a hollow along the long metal plate axis. The hollow is in the form of spherical surface segment. Its radius is equal to the nozzle radius coupled with the segment of spherical surface. The nozzle is directed to the free edge of the long metal plate by its larger diameter. The air intake is represented with two coaxial hollow cylinders of different length. The short cylinder of smaller diameter is provided with an open-ended perforation. There are open-ended slots on the long cylinder along its moving line and to the length of the short cylinder perforation. Both cylinders are interconnected by flanges with the injector being installed on its axis. The tapered part of the injector with the channel opening on the cone point for gas discharge are available inside the short cylinder of the smaller diameter. The cylinder part is linked with the pipeline supplying gas from the reservoir. Besides, the cylinder with larger diameter is linked with the air-gas mixture supply pipeline on the free end. The short plate overlaps radiating perforated panel by no more than 0.2 of its area.

EFFECT: increase of heater operation effectiveness under any weather conditions.

3 cl, 3 dwg