Combustion chamber

The invention relates to a combustion chamber for burning an air-fuel mixture, a gas mixture or a gas-liquid mixture, comprising an outer casing (9); a flame tube (10) located inside the outer casing and provided with an inner space (11 ), whereby the outer casing and the flame tube form an annular channel (12) therebetween, the flame tube comprising flow apertures (13) which penetrate through its casing and interconnect the annular channel and the inner-space of the flame tube; a cover part (14) arranged in inlet ends of the outer casing and the flame tube and provided with flow apertures opening up into the annular channel; a combustion air inlet part (16) which is arranged in an outer surface of the cover part and which is in connection with the flow apertures of the cover part; a fuel jet (17) located in the cover part and extending inside the flame tube for feeding fuel into the flame tube; whereby the combustion air inlet part (16) comprises an inlet channel (20) whose initial part is located substantially perpendicularly and eccentrically with respect to a longitudinal axis of the combustion chamber and which continues on a surface of the cover part spirally towards an end of the channel such that its volume decreases, and whereby a side of the inlet channel facing the cover part is in connection with the flow apertures of the cover part.