Easily assembled cooler

Abstract

A cooler capable of reducing the fabrication cost is provided. In the cooler, in which electronic parts 6 are held between neighboring tubes 1, each of the tubes 1 is formed by joining the edges of plates 1 a, 1 b, each of which is formed into a predetermined shape by press molding, and fins 5 for accelerating heat exchange are arranged in the tube 1. As an inner wall conventionally exists when the tube 1 is manufactured by extrusion, can be removed, it is no longer necessary to remove the inner wall by machining, therefore, the fabrication cost can be reduced.

1 . A cooler, comprising: 
 a plurality of tubes internally including a fluid passage through which a cooling fluid flows and piled at predetermined intervals in a direction perpendicular to a direction (X) in which the cooling fluid flows through the fluid passage; and    coupling means arranged between the neighboring tubes and for coupling the neighboring tubes; wherein    connection holes for making the fluid passage and the inside of the coupling means communicate with each other are formed in each tube,    electronic parts are held between the neighboring tubes,    each of the tubes is formed by joining edge parts of at least a plate formed into a predetermined shape by press molding, and    at least a fin for accelerating heat exchange is arranged in each of the tubes.    
   
   
       2 . A cooler as set forth in  claim 1 , wherein plate thickness of the fins is equal to or less than 0.4 mm.  
   
   
       3 . A cooler as set forth in  claim 1 , wherein at least the fin is joined to the tube and portions of the fin, which are joined to the tube, are arc-shaped.  
   
   
       4 . A cooler as set forth in  claim 1 , wherein at least the fin is arranged at a position at which the fin does not overlap the connection holes when viewed in a direction of built-up (Y) of the tubes, and the electronic part is within an area of installation of the fin when viewed in the direction of built-up (Y) of the tubes.  
   
   
       5 . A cooler as set forth in  claim 1 , wherein a plurality of the fins are arranged in the single tube at intervals (δ) along the direction (X) in which the cooling fluid flows through the fluid passage.  
   
   
       6 . A cooler as set forth in  claim 4 , wherein the intervals (δ) are greater than or equal to 1 mm.  
   
   
       7 . A cooler as set forth in  claim 1 , wherein the connection holes are formed by press molding.  
   
   
       8 . A cooler as set forth in  claim 1 , wherein each of the tubes is formed by joining the two plates.  
   
   
       9 . A cooler as set forth in  claim 1 , wherein each of the tubes is formed by bending and joining the single plate.  
   
   
       10 . A cooler as set forth in  claim 1 , wherein the coupling means are bellows.  
   
   
       11 . A cooler as set forth in  claim 1 , wherein each of the fins is a corrugated fin that divides the fluid passage into two or more fine flow passages, and 
 the height (hf) of the fin is greater than width (wf) of the fine flow passage of the fin at a central position of the fine flow passage in a direction of height of the tube.    
   
   
       12 . A cooler as set forth in  claim 11 , wherein the width (wf) of the fine flow passage is equal to or less than 1.2 mm.  
   
   
       13 . A cooler as set forth in  claim 11 , wherein the height (hf) of the fin is 1 to 10 mm.  
   
   
       14 . A cooler as set forth in  claim 1 , wherein the plate thickness (tf) of the fin is less than thickness (tp) of at least the plate.  
   
   
       15 . A cooler as set forth in  claim 14 , wherein the plate thickness (tf) of the fins is 0.03 to 1.0 mm.  
   
   
       16 . A cooler as set forth in  claim 14 , wherein the thickness (tp) of at least the plate is 0.1 to 5.0 mm.  
   
   
       17 . A cooler as set forth in  claim 1 , wherein the tube is formed-by joining at least the plate by brazing, and at least the plate is made of a bare material.  
   
   
       18 . A cooler as set forth in  claim 1 , wherein the tube is formed by joining at least the plate by brazing, at least the plate is made of a brazing sheet having a core material and a sacrifice anode material, and the core material is located at an outside of the tube.  
   
   
       19 . A cooler as set forth in  claim 1 , wherein the tube is formed by joining at least the plate by brazing, at least the plate is made of a brazing sheet having a core material and a brazing material, and the core material is located outside the tube.  
   
   
       20 . A cooler as set forth in  claim 1 , wherein the tube is formed by joining at least the plate by brazing, at least the plate is made of a brazing sheet in which a sacrifice anode material is arranged between a core material and a brazing material, and the core material is located at an outside of the tube.  
   
   
       21 . A cooler as set forth in  claim 1 , wherein the fins are made of a material that is potentially baser than that of at least the plate.  
   
   
       22 . A cooler, comprising: 
 a plurality of flat tubes internally including a fluid passage through which a cooling fluid flows and piled at predetermined intervals in a direction perpendicular to a direction (X) in which the cooling fluid flows through the fluid passage; and    header tanks arranged at both ends of the flat tubes and for distributing and gathering the cooling fluid; wherein    electronic parts arranged between the neighboring flat tubes are held by applying a pressing force in a direction of built-up (Y) of the tubes; and wherein    narrow parts that become narrower in the direction of built-up (Y) of the tubes are formed in each of the flat tubes.    
   
   
       23 . A cooler as set forth in  claim 22 , wherein the narrow parts are located at portions of the flat tube, at which the electronic parts are not held.  
   
   
       24 . A cooler as set forth in  claim 22 , further comprises a reinforcement plate at one end in the direction of built-up (Y) of the tubes, whose rigidity in the direction of built-up (Y) of the tubes is greater than that of each flat tube.  
   
   
       25 . A cooler as set forth in  claim 22 , wherein the electronic parts are arranged in two or more rows when viewed in the direction of built-up (Y) of the tubes and a pressing force is applied to each of the rows independently of each other.  
   
   
       26 . A cooler as set forth in  claim 22 , wherein the narrow parts extend in a direction perpendicular to both the direction of built-up (Y) of the tubes and the direction (X) in which the cooling fluid flows through the fluid passage.  
   
   
       27 . A cooler as set forth in  claim 22 , wherein fins that accelerate heat exchange are arranged at positions in the flat tube, at which the narrow parts are not formed.  
   
   
       28 . A cooler of a built-up type for cooling electronic parts from both sides thereof, comprising: 
 a plurality of flat cooling tubes provided with a refrigerant flow passage through which a cooling medium flows and arranged in layers, so as to sandwich and hold the electronic parts at both sides thereof; and    a supply header section for supplying the cooling medium to each of the refrigerant flow passages; and    a discharge header section for discharging the cooling medium from each of the refrigerant flow passages; wherein    each of the cooling tubes has protruding pipe parts opening and protruding toward the direction of built-up of the cooling tubes, and    neighboring cooling tubes make the refrigerant flow passages thereof communicate with each other by inserting the protruding pipe parts into each other and, at the same time, joining the sidewalls of the protruding pipe parts to each other, and thus forming the supply header section and the discharge header section.    
   
   
       29 . A cooler of a built-up type as set forth in  claim 28 , wherein each of the cooling tubes has a diaphragm part formed around each of the protruding pipe parts, which deforms in the direction of built-up.  
   
   
       30 . A cooler of a built-up type as set forth in  claim 29 , wherein the cooling tube has the diaphragm part formed only around one of a pair of the protruding pipe parts arranged in opposition to each other, but not one formed around the other of a pair of the protruding pipe parts.  
   
   
       31 . A cooler of a built-up type as set forth in  claim 30 , wherein the cooling tube has the diaphragm part formed around one of a pair of the protruding pipe parts, which is formed on the downstream side of the supply header section.  
   
   
       32 . A cooler of a built-up type as set forth in  claim 28 , wherein the cooling tube has a throttle part at an inlet part of the refrigerant flow passage, which narrows width of the refrigerant flow passage.  
   
   
       33 . A cooler of a built-up type as set forth in  claim 28 , wherein the cooling tube has a pair of outer shell plates, an intermediate plate arranged between a pair of the outer shell plates, and corrugated inner fins arranged between the intermediate plate and the outer shell plates.  
   
   
       34 . A cooler of a built-up type as set forth in  claim 33 , wherein the outer shell plates are made of a brazing sheet having a core material and a brazing material arranged on an inner surface of the core material, the intermediate plate and the inner fins are made of a metal plate including a metal baser than the core material of the outer shell plates, and a pair of the outer shell plates are formed by joining the inner surfaces at the ends thereof to each other.  
   
   
       35 . A cooler of a built-up type as set forth in  claim 34 , wherein each of the outer shell plates is made of a brazing sheet having a core material, a sacrifice anode material arranged on the inner surface of the core material, and the brazing material arranged on an inner surface of the sacrifice anode material.  
   
   
       36 . A cooler of a built-up type as set forth in  claim 33 , wherein each of the outer shell plate is made of a brazing sheet having a core material and a sacrifice anode material arranged on an inner surface of the core material, the intermediate plate is made of a brazing sheet having a core material and brazing materials arranged on both sides of the core material, the inner fins are made of a metal plate including a metal baser than the core material of the outer shell plate, and a pair of the outer shell plates are formed by joining the inner surfaces at ends thereof to both sides of the intermediate plate at ends thereof.  
   
   
       37 . A cooler of a built-up type as set forth in  claim 28 , wherein a first cooling tube arranged at one end in the direction of built-up of a plurality of the cooling tubes has a refrigerant introduction inlet for introducing the cooling medium to the supply header section and a refrigerant discharge outlet for discharging the cooling medium from the discharge header section, 
 each of the refrigerant introduction inlet and the refrigerant discharge outlet has a protruding opening part protruding toward the outside of the first cooling tube, and    a refrigerant introduction pipe and a refrigerant discharge pipe are inserted into the protruding opening parts at the refrigerant introduction inlet and the refrigerant discharge outlet, respectively.    
   
   
       38 . A cooler as set forth in  claim 1 , 
 wherein    electronic parts arranged between the neighboring tubes are held by applying a pressing force in a direction of built-up (Y) of the tubes; and wherein    narrow paths that become narrower in the direction of built-up (Y) of the tubes are formed in each of the tubes.    
   
   
       39 . A cooler as set forth in  claim 1 , comprising: 
 a supply header section for supplying the cooling fluid to each of the fluid passages; and    a discharge header section for discharging the cooling fluid from each of the fluid passages; wherein    the coupling means is formed by protruding pipe parts provided on each of the tubes, and opening and protruding toward the direction of built-up of the tubes, and    neighboring tubes make the fluid passages thereof communicate with each other by inserting the protruding pipe parts into each other and, at the same time, joining the sidewalls of the protruding pipe parts to each other, and thus forming the supply header section and the discharge header section.