Heat exchanger and method of manufacturing same

Abstract

Provided are a heat exchanger having a novel structure and efficiently cooling a heat generating body, and a method of manufacturing the heat exchanger. A heat exchanger has flow paths formed by being closed by an upper plate and a lower plate which have rectilinearly formed upstanding fins parallelly arranged at specific intervals, and gaps extend between adjacent fins in the top-bottom direction along the direction in which the fins extend. Either of or both the upper plate and the lower plate are provided with projections arranged in the longitudinal direction of the flow path and projecting inward of the flow path.

1 . A heat exchanger having a plurality of upstanding fins formed linearly and arranged in parallel with each other at predetermined intervals, and an upper plate and a lower plate placed top and bottom in an upstanding direction of the fins to enclose spaces between the adjacent fins to provide a plurality of passages defined by the enclosed spaces, wherein
 at least one of the upper and lower plates includes a plurality of protrusions arranged in a longitudinal direction of each passage to protrude therein, and   the protrusions formed in the adjacent passages are arranged in a staggered pattern in a direction perpendicular to a flat surface of the passages.   
     
     
         2 . The heat exchanger according to  claim 1  having: a fin member including the fins integrally formed on a base constituting either one of the upper and lower plates; and a cover plate constituting the other one of the upper and lower plates which is connected to the fins in an opposite side from the base, wherein
 the protrusions are formed on either the base or the cover plate. 
 
     
     
         3 . The heat exchanger according to  claim 2 , wherein the fin member is formed by extrusion-molding. 
     
     
         4 . The heat exchanger according to  claim 3 , wherein the protrusions are formed by press working. 
     
     
         5 . The heat exchanger according to  claim 1 , wherein
 ones of the protrusions adjacently arranged in a longitudinal direction of each passage are placed at such intervals as to prevent cooling performance to be generated between the protrusions from falling below a predetermined reference value.   
     
     
         6 . A heat exchanger including a plurality of upstanding fins formed linearly and arranged in parallel with each other at predetermined intervals and an upper plate and a lower plate placed top and bottom in an upstanding direction of the fins to enclose spaces between the adjacent finds to provide a plurality of passages defined by the enclosed spaces, wherein
 one of the upper and lower plates includes a plurality of protrusions protruding into the passages in a longitudinal direction thereof;   the heat exchanger includes: a fin member including the fins integrally formed on a base constituting either one of the upper and lower plates; and a cover plate constituting the other one of the upper and lower plates which is connected to the fins in an opposite side from the base, the protrusions being formed on either the base or the cover plate;   the fin member is formed by extrusion-molding;   the protrusions are formed by press-fitting a punch in the base or the cover plate on an opposite side from a passage surface to extrude a material toward the passage surface side; and   when the protrusions are to be formed, a plate-shaped holding member is inserted in the spaces between the adjacent fins to hold the fins.   
     
     
         7 . A heat exchanger including a plurality of passages defined by a plurality of upstanding fins formed linearly in parallel having predetermined spaces and an upper plate and a lower plate placed top and bottom in an upstanding direction of the fins to enclose the spaces between the adjacent fins, wherein
 one of the upper and lower plates includes a plurality of protrusions protruding into the passages in a longitudinal direction thereof;   the heat exchanger includes: a fin member including the fins integrally formed on a base constituting either one of the upper and lower plates; and a cover plate constituting the other one of the upper and lower plates which is connected to the fins in an opposite side from the base, the protrusions being formed on either the base or the cover plate;   the fin member is formed by extrusion-molding,   the fin member is formed as an intermediate fin member having raised portions each continuous in the extruding direction in each space between the adjacent finds; and   the protrusion are formed by inserting pressing plates separately formed in the extruding direction into the spaces to squash the raised portions except separating portions to form the protrusions.   
     
     
         8 - 10 . (canceled)