| 摘要 |
PURPOSE: A supply and exhaust pipe for heater is provided to prevent erroneous operation of relay unit by preventing rain water from entering the heater body. CONSTITUTION: A supply and exhaust pipe comprises a supply and exhaust pipe body(50) having an air supply pipe(51) and an air exhaust pipe(52) with open ends; an insertion pipe(70) inserted into and coupled with the supply and exhaust pipe body, and which includes an air supply pipe(71) having air supply holes(73) formed at one side of the air supply pipe and an air exhaust pipe(72) having a nozzle portion(74) with a closed end; and an O-ring(60) interposed between the supply and exhaust pipe body and the insertion pipe so as to maintain air-tightness between the supply and exhaust pipe and the insertion pipe. The insertion pipe is coupled with the supply and exhaust pipe body in such a manner that air supply holes of the insertion pipe are directed downward, to thereby prevent rain water from entering the supply and exhaust pipe body. |
