Original plate material for heat-exchanging plate and heat-exchanging plate using the same

Abstract

An original plate material for a heat exchanging plate includes a titanium flat plate material including a minute recess and projections on the surface thereof, and the flat plate material is press-worked to obtain the heat exchanging plate. The shape parameter, defined as [height (μm) of the projections]×[width (μm) of the recess/pitch (μm) of adjacent projections], is 85 μm or less. Relating to this original plate material for a heat exchanging plate, the shape parameter, defined as [height (μm) of the projections]×[width (μm) of the recess/pitch (μm) of adjacent projections/angle (deg) of the projections], is 0.94 μm/deg or less.

1 . An original plate material for a heat-exchanging plate, the original plate material being subjected to press working so as to be used as a heat-exchanging plate, the original plate material being made by forming a fine recess and fine projections on a surface of a metal flat plate material as a raw material,
 wherein the recess and the projections are formed such that a shape parameter G1 defined as a height of a projecting part in μm×[a width of a recessed part in μm/a pitch between the adjacent projecting parts in μm] is equal to or smaller than 85 μm.   
     
     
         2 . The original plate material for a heat-exchanging plate according to  claim 1 ,
 wherein the recess and the projections are formed on a surface of the original plate material such that the shape parameter G1 is equal to or greater than 4 μm.   
     
     
         3 . The original plate material for a heat-exchanging plate according to  claim 1 ,
 wherein the projecting parts each have a circular shape in plan view and are arranged on the surface of the flat plate material in a staggered manner.   
     
     
         4 . The original plate material for a heat-exchanging plate according to  claim 1 ,
 wherein the height of the projecting parts is equal to or greater than 5 μm expressed as ten-point average roughness Rz and equal to or smaller than 0.1×a thickness of the flat plate material in μm.   
     
     
         5 . The heat-exchanging plate according to  claim 1 ,
 wherein the heat-exchanging plate is formed by press working performed on the original plate material for a heat-exchanging plate.   
     
     
         6 . An original plate material for a heat-exchanging plate,
 the original plate material being subjected to press working so as to be used as a heat-exchanging plate, the original plate material being made by forming a fine recess and fine projections on a surface of a metal flat plate material as a raw material,   wherein the recess and the projections are formed such that a shape parameter G2 defined as a height of a projecting part in μm×[a width of a recessed part in μm/a pitch between the adjacent projecting parts in μm/an angle of the projecting part in deg] is equal to or smaller than 0.94 μm/deg.   
     
     
         7 . The original plate material for a heat-exchanging plate according to  claim 6 ,
 wherein the recess and the projections are formed on a surface of the original plate material such that the shape parameter G2 is equal to or greater than 0.14 μm/deg.   
     
     
         8 . The original plate material for a heat-exchanging plate according to  claim 6 ,
 wherein the recess and the projections are formed on a surface of the original plate material such that the shape parameter G2 is equal to or greater than 0.028 μm/deg.   
     
     
         9 . The original plate material for a heat-exchanging plate according to  claim 6 ,
 wherein the height of the projecting parts is equal to or greater than 5 μm expressed as ten-point average roughness Rz and equal to or smaller than 0.1×a thickness of the flat plate material in μm.   
     
     
         10 . The heat-exchanging plate according to  claim 6 ,
 wherein the heat-exchanging plate is formed by press working performed on the original plate material for a heat-exchanging plate.