Importance

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Abstract

A vaporizing device (80) for vaporizing vaporizable matter without burning the vaporizable matter, typically, tobacco, comprises a vaporization chamber (61) for the vaporizable matter, and a gas powered heating unit (1) for heating the vaporization chamber (61). The heating unit (1) comprises a housing (2) having a main cylindrical side wall (4) closed at its respective ends by a first end wall (5) and a second end wall (6) to form a main chamber (8) within which fuel gas is converted to heat. A secondary cylindrical side wall (62) extends from the second end wall (6) to form the vaporization chamber (61) for receiving a tobacco product (81), a cylindrical sleeve (83) of tobacco (84) for producing an aerosol of vaporizable constituents in the tobacco (84). A cylindrical partition wall (10) concentric with the main side wall (4) of the housing (2) extends into the main chamber (8) from the first end wall (5) and defines a primary combustion chamber (11) and a secondary combustion chamber (12). A cylindrical primary gas catalytic combustion element (13) is located in the primary combustion chamber (11), and a cylindrical secondary gas catalytic combustion element (14) is located in the secondary combustion chamber (12). A fuel gas/air mixture is delivered into the primary combustion chamber (11) through a fuel gas inlet (17) in the first end wall (5) for conversion to heat by the primary gas catalytic combustion element (13). Exhaust gases with entrained unburnt fuel gas from the primary combustion chamber (11) pass into the secondary combustion chamber (12) where remaining unburnt fuel gas is converted to heat by the secondary gas catalytic combustion element (14). An exhaust gas outlet (18) through the main side wall (4) accommodates exhaust gases from the secondary combustion chamber (12).

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First Claim