| 摘要 |
A solar heater comprising two or more containers nested one within the other for the solar heating of a gaseous medium such as air therein. Each container is provided, near its lower end, with a solar radiation absorbing metal sheet which, when it becomes hot, raises the temperature of the air within the container causing the heated air to rise to the top of the container where it transfers some of its heat to the adjacent container and to the outside air, thereby creating convection currents. The innermost container is provided with a boiler structure positioned to be heated by incident solar radiation to a temperature sufficiently high to convert water within the boiler structure to stem. The boiler structure is of thin flat configuration, is covered by radiation absorbing material on the face thereof which is exposed to solar radiation, has its opposite face polished to a shine, has a number of reinforcing members extending between the opposing faces of the boiler structure, and exhibits surface sections of smoothly curved outwardly bulging convex configuration between the reinforcing members to provide a comparatively light weight boiler structure having adequate strength to withstand the pressure of steam generated therein. In one form of the invention a cylindrical lens is provided to concentrate the sun's rays and superheat the steam obtained from the boiler.
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