公开(公告)号：JPH02286421A

公开(公告)日：1990-11-26

申请号：JP6247290

申请日：1990-03-12

Applicant: WEBASTO AG FAHRZEUGTECHNIK

Inventor： DEEETAA RATSUTSUERU ,  KURISUTOFU SHIYUMASHIERU ,  BIRUFUREITO RENOFUANTSU ,  BERUNHARUTO UMURAUFU

IPC: B60H1/03 ,  B60H1/22 ,  F02B3/06 ,  F23K5/20 ,  F24H3/06

Abstract: PURPOSE: To preheat fuel economically by placing a fuel preheating pipe section in the flow passage of combustion gases flowing in a heat exchanger in an automobile heater having a heat exchanger wherein heat is transferred between the combustion gases produced by a burner and a heat transfer medium. CONSTITUTION: An automobile heater 1 has a burner 2 burning fuel from a fuel feed pipe 3, and high-temperature combustion gases generated therein are supplied to a heat exchanger 5, where the temperature of a heat transfer medium flowing in the heat exchanger 5 is elevated by heat exchange. The combustion gases after the heat exchange flow to an exhaust gas collecting chamber 6 and flow out via an exhaust gas outlet 7. In this case, a fuel preheating pipe section 10 in the form of a pipe loop 11 is placed near the exterior wall 12 of the exhaust gas collecting chamber 6 upstream of the outlet 7 along the flow direction of exhaust gas toward the outlet 7. The suction side and release side of the pipe loop 11 are branchingly connected to the fuel fed pipe 3 upstream of a filter 13.