| 摘要 |
PURPOSE: A heat exchanger with a double vacuum tube is provided to maximize a radiating area using a heat radiation fin of a vacuum pipe and the heat radiation fin of an inner pipe. CONSTITUTION: A heat exchanger with a double vacuum tube comprises a vacuum heat exchanging tube(10), a heater(20), a vacuum heater(30), a circulating pipe(50), and an inner pipe(40). The heater is inserted inside the vacuum heat exchanging tube. A heat radiation fin(31) is formed on the outer circumference of the vacuum heater. The inner pipe is inserted to the inside of the vacuum heater. The heat radiation fin formed n the outer circumference of the inner pipe is attached to the inner surface of the vacuum heater. |
