JPS57134657A - Hot air heater utilizing solar heat - Google Patents

Abstract

PURPOSE:To prevent the temperature within a heat collecting casing from being lowered owing to the air introduced in the casing by a method wherein an outside air guide pipe, which is connected to an outside air opening and as well as provided with an opening for discharging the outside air at the lower part of the casing, is provided within the casing. CONSTITUTION:The outside air guide pipe 5 is arranged on a flat plate lath 7 placed on heat accumulating elements 4. The outside air guide pipe 5 is bent in a rectangular form nearly along the inner periphery of the casing 1. The both open ends of the pipe 5 are collected by means of a manifold and open to the outside through the outside air opening 12 of the casing 1 for intake of the outside air. Because there is a fear that if the low temperature outside air is introduced without deep thoughts from the outside air opening into the casing 1 said air is diffused so as to cool the inside air heated with much labors, the outside air guide pipe 5 serves to guide the outside air in the fixed flow passage in order to prevent the air from diffusing and as well as to give the air a certain ectent of preheating effect by flowing within the pipe 5 and, after that, to diffuse in the casing 1 for heating the inside air.