Burner device of regenerative and alternate combustion type

摘要

A burner device of regenerative and alternate combustion type including a pair of burners and a regenerative bed, which permits flow passage changeover to be taken selectively between the pair of burners, via the regenerative bed, by four-way and three-way valves which are simultaneously operated by one actuator. Preferably, both two valves are connected coaxially together. The four-way and three-way valves have a same angle of rotation for executing their respective flow passage changeover actions, but they each have its own inoperative area defined differently from each other to produce a difference in timing for supply of fluid to one of the two burners, thereby providing a lead time for prior supply of air and a delay time for delaying supply of fuel to facilitate ignition in one of the burners during the alternate combustion operation. A rotary inner valve element in the three-way valve is increased in diameter relative to that of a communicator port formed therein to reduce the angle of rotation for closing its three ports in order to avoid an increased loss of pressure of fluid passing therethrough and make longer the foregoing delay time.