US 5,476,378 A · Turbine device for hot air generation

Abstract

The pressure head needed to drive combustion air into the combustion region (46) of a heat gun (930) is imparted to the air by a compressor blades (36) driven by a turbine whose blades (32) are interposed in the fuel conduit that leads to the combustion region (46). The expansion of the gaseous fuel, which is obtained from a pressurized source, provides the power to impose the necessary pressure head. The turbine-compressor combination is efficient enough that it can extract from the fuel flow enough power to maintain the necessary pressure head not only on the combustion gas (A.sub.1), which flows through vents (44) in a manifold (43), but also on a larger volume of air (A.sub.2) delivered downstream of the combustion region (46) to dilute the combustion products and thereby cool them to the desired heat-gun output temperature.

Claims6

Dependent claims

A gas heating device comprising a source of unheated pressurized gas fuel;

a housing including means for forming an inner chamber open to the atmosphere at one end for directing flow of air, means forming an outer annular passage about said inner chamber for directing flow of pressurized gas and a combustion chamber for receiving air from the inner chamber and gas from said outer annular passage;
A single prime mover comprising a first set of radial blades in the inner chamber for compressing air and a second set of radial blades in the outer annular passage and driven only by the expansion energy of the unheated pressurized gas;
wherein the pressurized gas fuel is mixed with the compressed air and ignited in the combustion chamber to form combustion gases, an exhaust gas nozzle means directing the combustion gases from the combustion chamber.

Dependencies are inferred from the claim text.

Turbine device for hot air generation

Life of this patent

Turbine device for hot air generation

Life of this patent

Abstract

Claims6