A gas burner with two gas flow passages

摘要

A gas burner comprises a first gases flow passage 52 with an inlet and an outlet, a source of oxidising gases at the inlet of the first passage 52, a second gases flow passage with an inlet and an outlet, a source of oxidising gases at the inlet of the second passage, the outlet of the first passage 52 proximate to the outlet second passage, a fuel gas jet 46 configured to supply fuel to the second passage, a flame locating means 49 within the second passage 52 sheltered from the oxidising gases in the first passage 52, and a burner cap 3 spaced downstream from the outlet of the second flow passage. The burner cap 3 extends transversely to the outlet of the second flow passage. Oxidising gas is typically supplied by fan 41 and flows over baffle 54 to the first passage 52 via circumferentially spaced slots in the burner housing.