| 摘要 |
PURPOSE:To constitute a plate type heat exchange element having an excellent heat transfer coefficient, an excellent pressure resistance and the like by assembling plate formed by working corrugations and grooves rectangularly intercrossing them. CONSTITUTION:Corrugated grooves 12 which are formed in parallel to plate 11 and repeated grooves 13 formed rectangularly thereto are provided. The grooves 12 and 13 may be formed into a semi-circular shape, a trapezoidal shape and any other shapes. A heat transfer element 14 is constituted by accumulating the plates 11 upside down alternately. Upon this occasion, the depressions of the grooves 12 are assembled to form cylindrical flow passages 15 so that the projections of the grooves 13 make contact with each other, and further the grooves 12 are distorted by a half pitch at every step. As a result, a zigzag flow passage 16 is formed. The heat exchanger constituted of this heat transfer element has as large heat transfer coefficient by the turbulent flow of the flow passages, and has an excellent pressure resistance as a plate type. The resistance to thermal impact is strong due to the depressions an projections of the plate. |
