| 摘要 |
PURPOSE:To prevent the corrosion of an outer part at low temperature, by keeping the temperature of heat carrier liquid at an inlet part by a quantity of heat loss of the engine, and performing the thawing action utilizing the exhausted heat as a whole. CONSTITUTION:The heat carrier liquid is forcibly circulated between an exhausted heat recovering heat exchanger 3 and a bypass circuit 10 until the heat carrier liquid temperature at the inlet part of the exhausted heat recovering heat exchanger 3 becomes 150 deg.C or more after the start of operation. The heat carrier liquid at the inlet part of the exhausted heat recovering heat exchanger 3 is quickly heated to about 150 deg.C or more. The heat carrier liquid at the inlet part of the exhausted heat recovering heat exchanger 3 is automatically kept at about 150 deg.C or more during the operation. Thus, the corrosion of the outer part of the exhausted heat recovering heat exchanger 3 at the low temperature is prevented. |
