Plate for use as heat exchange plate and method for manufacturing such base plate

Abstract

A plate for a heat-exchanging plate comprises a metallic flat plate having fine irregularities formed on a surface thereof, the metallic flat plate obtained through press-working which is implemented as a post-process, of the flat plate. The irregularities include a plurality of projections that are formed at a predetermined spacing, and the plurality of projections includes first ridges disposed at an angle +θ with respect to a width direction of the plate and second ridges disposed at an angle −θ with respect to the width direction of the plate, the projections being formed into V-shapes by the first ridges and the second ridges.

1 . A plate for a heat-exchanging plate, the plate comprising:
 a metallic flat plate having fine irregularities formed on a surface thereof, the metallic flat plate obtained through press-working which is implemented as a post-process, of the flat plate, wherein   the irregularities include a plurality of projections that are formed at a predetermined spacing; and   the plurality of projections includes first ridges disposed at an angle +θ with respect to a width direction of the plate and second ridges disposed at an angle −θ with respect to the width direction of the plate, the projections being formed into V-shapes by the first ridges and the second ridges.   
     
     
         2 . The plate for a heat-exchanging plate according to  claim 1 , wherein a groove portion is formed along a longitudinal direction of the plate, at respective tops of the V-shapes. 
     
     
         3 . The plate for a heat-exchanging plate according to  claim 1 , wherein
 a height of the projections is set to be 0.02 mm or greater and 0.1 mm or less;   a width of the projections is set to be 0.08 mm or greater and 1 mm or less;   a value of θ is set to be 10° or greater and 80° or less;   a width of recesses between the projections is set to be 0.1 mm or greater and 1 mm or less; and   a pitch P 1  between adjacent projections is set to be 0.2 mm or greater and 2 mm or less.   
     
     
         4 . The plate for a heat-exchanging plate according to  claim 2 , wherein a width of the groove portion is set to be 0.5 mm or greater and 500 mm or less. 
     
     
         5 . The plate for a heat-exchanging plate according to  claim 2 , wherein
 the groove portion is formed in plurality, and   a width pitch P 2  between adjacent groove portions is set to be 5 mm or greater and 1000 mm or less.   
     
     
         6 . The plate for a heat-exchanging plate according to  claim 5 , wherein the irregularities of the surface of the plate are set such that a shape parameter defined as “height (mm) of the projections×width (mm) of recesses between projections×[width (mm)/width pitch P 2  (mm) of the groove portions]” is 0.0025 mm 2  or greater. 
     
     
         7 . A method for producing a plate for a heat-exchanging plate, the plate comprising a metallic flat plate having fine irregularities formed on a surface thereof, and the metallic flat plate being obtained through press-working which is implemented as a post-process, of the flat plate, the method comprising:
 forming the irregularities on the surface such that the irregularities include a plurality of projections formed at a predetermined spacing; and   forming, when forming the irregularities, the plurality of projections such that the plurality of projections includes first ridges disposed at an angle ±θ with respect to a width direction of the plate and second ridges disposed at an angle −θ with respect to the width direction of the plate, and the projections are formed into V-shapes by the first ridges and the second ridges.   
     
     
         8 . The method for producing a plate for a heat-exchanging plate according to  claim 7 , the method further comprising: forming a groove portion along the longitudinal direction of the plate, at respective tops of the V-shapes. 
     
     
         9 . The method for producing a plate for a heat-exchanging plate according to  claim 7 , wherein
 a height of the projections is set to be 0.02 mm or greater and 0.1 mm or less,   a width of the projections is set to be 0.08 mm or greater and 1 mm or less;   the θ is set to be 10° or greater and 80° or less;   a width of recesses between the projections is set to be 0.1 mm or greater and 1 mm or less; and   a pitch P 1  between adjacent projections is set to be 0.2 mm or greater and 2 mm or less.   
     
     
         10 . The method for producing a plate for a heat-exchanging plate according to  claim 8 , wherein a width of the groove portion is set to be 0.5 mm or greater and 500 mm or less. 
     
     
         11 . The method for producing a plate for a heat-exchanging plate according to  claim 8 , wherein when forming the groove portion in plurality, a width pitch P 2  between adjacent groove portions is set to be 5 mm or greater and 1000 mm or less. 
     
     
         12 . The method for producing a plate for a heat-exchanging plate according to  claim 11 , wherein the irregularities of the surface of the plate are designed such that a shape parameter defined as height (mm) of the projections×width (mm) of recesses between projections×[width (mm)/width pitch P 2  (mm) of the groove portions] is 0.0025 mm 2  or greater.