HEAT EXCHANGER HAVING ELECTRONIC AIR EXHAUST UNIT

摘要

PURPOSE: A heat exchanger is provided to prevent the reduction of heating efficiency by exhausting air in a feed pipe to outside when flowing more than the proper amount of air in the feed pipe. CONSTITUTION: A heat exchanger is composed of: an air pressure sensor(20) for detecting the air pressure flowing in a feed pipe(5); a control unit(30) for generating control signals if the amount of air in the feed pipe is detected as larger than a standard amount through the air pressure sensor; and a solenoid valve(40) for isolating the feed pipe after exhausting the air in the feed pipe to outside by opening the feed pipe. The heat exchanger prevents the heating efficiency from being reduced by exhausting the air in the feed pipe to outside through the solenoid valve.