Device for measuring the air flow rate through the air passage of a burner

摘要

A device for measuring the flow rate through the air passage of a burner, arranged in a closed combustion chamber, by means of an adjustable throttle (7) comprises a pressure switch (5) which is assigned to the air passage (1, 2) and includes a contact (12) which can be actuated in dependence on the flow rate of said air passage and, during gradually opening of the adjustable throttle (7), switches as soon as the optimal composition of the fuel-air mixture supplied to the burner is achieved. During initial start-up of the burner-heated appliance, this adjustable throttle (7) is first gradually opened until the contact (12) switches. The level of the effective pressure at the switching time which can be visually indicated corresponds to the optimal air ratio at nominal output of the burner and determines the desired setting of the throttle. <IMAGE>