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(11) | EP 0 070 360 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | A heating system |
| (57) An infra-red gas heating system is described. The system comprises a heating pipe
(18) and a plurality of combustion devices distributed along the length of the heating
pipe for supplying hot gases to the interior of the pipe to cause the pipe to emit
infra-red radiation from its surface. Each combustion device comprises a burner unit
(G) disposed in the heating pipe (18) and control means (F) having an air orifice
(11) for supplying the correct amount of air for complete combustion of fuel to the
burner unit, means being provided to cause a predetermined excess of air to flow through
the pipe in use of air to flow through the pipe in use of the system so that each
of the serially arranged burner units can operate within the pipe with complete combustion
of fuel in an atmosphere which contains the combustion gases of any upstream burner
units. Radiant heat from the pipe may be deflected by means of a reflector means and
the temperature of the pipe may be controlled locally by insulating means provided
inside the pipe. |