AIR SUPPLYING AND EXHAUST GAS DISCHARGING DEVICE FOR COMBUSTION INSTRUMENT

PURPOSE:To prevent the sucking of exhaust gas into an air supplying passage as well as bad effect of strong wind to the combustion of the title instrument, by a method wherein the exhaust gas guiding unit of an air supplying and exhaust gas discharging device, utilized for an outdoor air supplying and exhaust gas discharging type kerosene combustion instrument and the like, is formed so as to have the expanding angle of an acute angle. CONSTITUTION:An indoor side air supplying and exhaust gas discharging unit 1A is constituted of the double structure of an indoor side exhaust gas discharging tube 4 and an indoor side air supplying tube 5. One end of an outdoor side exhaust gas discharging tube 14 for an outdoor side air supplying and exhaust gas discharging unit 2A is projected forwardly than a flange body 17 at one end of an outdoor side air supplying tube 15 while a decorative body 21 is attached thereto integrally. The decorative body 21 is provided with an exhaust gas guiding unit 21A, expanded forward, and a cover unit 21B, expanded from the fore end part toward afterward part, at the central part thereof. When the expanding angle of the exhaust gas guiding unit 21A is an acute angle of about 50-70 deg., exhaust gas is discharged without being decelerated substantially while running apart from the outer peripheral rim of the decorative body 21, therefore, mixing of the exhaust gas into supplying air may be reduced.