| 摘要 |
PURPOSE:To improve heat exchanging efficiency and remove deposited foreign matter easily by installing an airtight cylindrical case at the open end of which a cover is removably placed and means of fixing both ends of a helical tube on the outer surface of which a helical buffle is placed, on the cover. CONSTITUTION:In the inside of an airtight cylindrical case 1 which is used as a passage for a primary heat exchanging fluid and at the upper open end of which a cover 2 is attached, a cylinder helical tube 3 which is used as a passage for a secondary heat exchanging fluid, is installed. A helical buffle 5 is incorporated into the helical gaps of the tube 3. The presence of this buffle 5 causes water flowing in to flow along a helical flow passage without flowing directly from an inlet to an outlet. Even if foreign matter or microorganism contained in the primary fluid sticks or deposits, the tube 3 is easily taken out with the removable cover. Heat exchanging efficiency equal to that of a double-tube type heat exchanger can be provided and also deposited foreign matter can be removed easily and rapidly.
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