Compact apparatus for generating a hot air flow with a gas burner

Abstract

This is a compact apparatus for generating a hot airflow to be utilized for all those functions where a hot airflow is suggested or required as, for example, in prep stations, spray booths and mix rooms. An outer air duct, that has one of its end closed, contains a second, smaller air duct that houses a fan, powered by a motor, and a gas burner. Cool air enters the outer air duct, passes through the warm hollow space between said two air ducts, goes through said burner located inside the inner duct, and hot air exits from the inner air duct. It is energy efficient, simple to operate, cost effective, and space effective.

1 . A compact apparatus for generating a hot airflow comprising:
 a. an outer air duct, with at least one closed end, and at least one air inlet,   b. an inner air duct, which is housed inside said outer air duct, with at least one air inlet on its end that faces said closed end of said outer air duct, and at least one air outlet on its other end,   c. a fan, powered by a motor, which is housed inside said inner air duct, that has a dual purpose of sucking the air into said apparatus and blowing the air out of said apparatus,   d. a gas burner, housed inside said inner air duct;   
   
   
       2 . A compact apparatus for generating a hot-airflow as described in  claim 1 , wherein said inner air duct is housed inside and parallel to said outer air duct; 
   
   
       3 . A compact apparatus for generating a hot airflow as described in  claim 1 , wherein said gas burner is housed inside said inner air duct and is positioned between said fan and said air outlet; 
   
   
       4 . A compact apparatus for generating a hot airflow as described in  claim 1 , wherein said gas burner is housed inside said inner air duct and is positioned between said fan and said air inlet; 
   
   
       5 . A compact apparatus for generating a hot airflow as described in  claim 1 , wherein said inner air duct is made of catalytic material; 
   
   
       6 . A compact apparatus for generating a hot airflow as described in  claim 1 , wherein said inner air duct is partially made of catalytic material; 
   
   
       7 . A compact apparatus for generating a hot airflow as described in  claim 1 , wherein said inner air duct is concentric to said outer air duct.