公开(公告)号：EP4191135A1

公开(公告)日：2023-06-07

申请号：EP22202352.5

申请日：2022-10-19

申请人： Bosch Thermotechnology Ltd (UK)

发明人： Collins, Tom ,  Hemmen, Patrick ,  Beazley, Benjamin

IPC分类号： F23N1/00

摘要： In an air-gas mixing unit for an air-gas mixture burning appliance, comprising: at least one air-gas mixer (118), an air supply (112) with an airway (212), and a gas supply (116) with a gas channel (216) that is connected to a gas governor (210), wherein the gas governor comprises: a gas valve (215) that is adapted to control gas pressure in the gas channel (216) dependant on an air pressure signal (235) that is indicative of a static air pressure in the air way, and a gas restrictor (250) that restricts flow of gas from the gas valve to a point of mixing (119); the gas restrictor is interchangeable between at least one first gas restrictor that is embodied to form a gas flow with a first Reynolds number and at least one second gas restrictor that is embodied to form a gas flow with a second Reynolds number.