Abstract: A pulse combustor has a casing in which a combustion chamber is defined. Air is supplied to the combustion chamber through an air supply pipe. A valve mechanism for controlling the air supply to the chamber is provided in the air supply pipe. The valve mechanism has a base plate with a plurality of air supply holes for the passage of air, and a flapper valve for opening and closing the air supply holes in accordance with the change of pressure inside the chamber. The flapper valve is composed of a plurality of ring-shaped segments with different diameters. These segments are arranged concentrically with one another.

Abstract: A silencer unit has charging- and exhaust-side silencers which are integrally formed into a double-cylinder housing. The housing has an outer cylinder and an inner cylinder disposed in the outer cylinder. The charging-side silencer is connected to an air charging pipe of a pulse combustor to attenuate noise generated from the charging side of the combustor. The exhaust-side silencer is connected to an exhaust pipe of the combustor to attenuate noise generated from the exhausing side of the combustor. The charging-side silencer has a first low-frequency sound arresting chamber defined in the inner cylinder and a first high-frequency sound arresting chamber defined between the inner and outer cylinders. The exhaust-side silencer has a second low-frequency sound arresting chamber defined in the inner cylinder and a second high-frequency sound arresting chamber defined between the inner and outer cylinders.

Abstract: A pulse combustor comprises a throttle plate provided in a cylindrical body for dividing the interior of the body into a combustion chamber and a mixture chamber and having a throttle hole, gas suction holes communicating with the combustion chamber, air suction holes communicating with the combustion chamber, igniting plug provided in the combustion chamber for explosing and burning the mixture gas of the air and the fuel gas therein, and valve plate provided in the mixture chamber for shutting off the communication of the gas suction holes and air suction holes with the mixture chamber when the pressure in the mixture chamber becomes positive as the mixture gas is exploded and burnt and enabling the communication when the pressure in the mixture chamber becomes negative.

Abstract: In a pulse burner of the type wherein an air-fuel mixture in a combustion chamber is explosively burnt by an ignition plug, a flapper valve repeatedly opens and closes an air inlet passage and a fuel inlet passage so as to repeat explosive combustion of an air-fuel mixture at a high frequency, there is provided a flame detector which interrupts the ignition plug and a fan for supplying air into the combustion chamber once the combustion has started normally.

Abstract: An air type heating system includes a heat collector connected to heat air streams running through the collector by solar heat and a heat storage member containing heat-storage material for absorbing heat of the air heated by the heat collector and progressively accumulating heat, starting with one air port. A room is heated by the heated air supplied from the heat collector and/or the heat storage member through the one air part thereof.