Solar heater, gas heater, solar air collector, air heater and solar and infrared energy absorber

摘要

A solar heating panel has a cover plate (12) passing the sunlight and mounted clear of the first surface of an absorber (16) so as to form a first heating chamber between them. Uncontrolled penetration of ambient air into this compartment is prevented An infra-red reflector plate (18) is mounted clear of the second absorber surface so as to form a second heating compartment, uncontrolled penetration of which by the ambient air is also prevented. A gas is passed through the two compartments in order to heat it by solar and infra-red energy, and also by convection.