Combustion device for an outdoor flame heater

Abstract

A combustion device for outdoor flame heaters includes an improved structure of a burner disposed below a glass tube thereof. The burner has a gas distribution room therein and a plurality of flame holes at a top surface thereof communicating with the gas distribution room and directed towards the glass tube. The flame holes have a diameter which is at least 10 mm for the flame to be in red and yellow, and a piece of metal wire mesh with a sieve size between 20-30 mesh abuts thereto from under in the gas distribution room, so as to construct a structure with a relatively greater diameter above and a relatively lesser diameter below for the flame to be emitted from the glass tube at an appropriate height by chimney effect to enhance the heating effects.

What is claimed is: 
     
         1 . An improved combustion device for an outdoor flame heater, comprising:
 a housing with an inside space for installing a gas barrel;   a base mounted on the housing, including a gas intake tube and a gas control switch;   a burner mounted on the base;   a plurality of support members having a bottom end fixed on the housing to define a mounted space therein;   a glass tube disposed in the mounted space;   the burner including a top surface extending to define a gas distribution room over said gas intake tube; the top surface forming a plurality of tubular flame holes communicating with the gas distribution room and directed towards the glass tube, the top surface extending to a flange surface fastened to the base; a bottom surface of the gas distribution room being connected to the gas intake tube;   wherein said flame holes have a diameter which is at least 10 mm for the flame to be in red and yellow, and a piece of metal wire mesh with a sieve size between 20-30 mesh abuts thereto from under in the gas distribution room, so as to construct a structure with a relatively greater diameter above and a relatively lesser diameter below; and   a cover covering the burner to delimit an air distribution room between the burner and the cover, the air distribution room receiving gas projected through the flame holes for combustion therein, the cover having a plurality of airflow holes formed therein; a top of the cover having a recessed mounted hole for receiving a bottom end of the glass tube; the glass tube thereby having a lower opening located above the plurality of flame holes and the air distribution room for receiving and guiding a flame therefrom.   
     
     
         2 . The improved combustion device for an outdoor flame heater as claimed in  claim 1 , wherein the housing has a front side corresponding to the base, the front side having an opening and the base being exposed to the opening. 
     
     
         3 . The improved combustion device for an outdoor flame heater as claimed in  claim 2 , wherein the flange surface of the burner has a plurality of screw holes arranged thereon; a periphery of the cover corresponding to the flange surface has an extended convex ring surface having an external periphery fixed on a support plate on top of the housing; the convex ring surface corresponding to the screw holes has a plurality of positioning holes for the convex ring surface to be locked on the flange surface by a plurality of screws and consequently fix the burner and base under the cover as well. 
     
     
         4 . The improved combustion device for an outdoor flame heater as claimed in  claim 3 , wherein the burner and the base are detachable relative to the cover and removably disposed with respect to the opening of the housing, the plurality of screws being removably positioned within the screw holes. 
     
     
         5 . The improved combustion device for an outdoor flame heater as claimed in  claim 1 , wherein the gas distribution room of the burner is a hollow body composed of an upper stamping plate and a lower stamping plate, and the plurality of flame holes are integrally molded with the upper stamping plate. 
     
     
         6 . The improved combustion device for an outdoor flame heater as claimed in  claim 1 , wherein the recessed mounted hole of the cover includes an annular support surface at a bottom edge thereof for positioning the glass tube. 
     
     
         7 . The improved combustion device for an outdoor flame heater as claimed in  claim 1 , further comprising a plurality of protective wire meshes fixed between the support members.