Cooling jacket

• US 7,516,777 B2
• Filed: 03/31/2006
• Issued: 04/14/2009
• Est. Priority Date: 03/31/2005
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Terakado, Shuichi, Nishihara, Atsuo, Ohashi, Shigeo, Naganawa, Takashi, Minamitani, Rintaro
• Primary Examiner(s): Flanigan; Allen J
• Application Number:
  US11/393,783
• Publication Number:
  US 20060219388A1
• Time in Patent Office: 1,110 Days
• Field of Search: 165/80.4, 165/170, 361/699
• US Class Current: 165/80.4
• CPC Class Codes: F28F 13/06 by affecting the pattern of flow of the heat-exchange media F28F13/003 takes precedence; static flow control means in header boxes F28F9/026
• CPC Class Codes: F28F 3/12 Elements constructed in the shape of a hollow panel, e.g. with channels F28D1/02, F28D1/03 take precedence
• CPC Class Codes: G06F 1/203 for portable computers, e.g. for laptops
• CPC Class Codes: G06F 2200/201 Cooling arrangements using cooling fluid

Abstract

In an electronic apparatus having a heat-generating element therein, a cooling jacket 100 for transmitting heat generated from the heat-generating element 200 into to a liquid coolant flowing therein, comprises: a cover 130 building up a heat transfer surface to be in contact with a surface of the heat-generating element; a passage 110 for the liquid coolant, which is formed neighboring with the heat transfer surface and wound round in a “S”-like manner within an inside of a main body 120 of the cooling jacket; and an inlet 111 and an outlet 112 attached at both ends of the flow passage of the liquid coolant, and further a dispersion member 150 is disposed in the flow passage, being built up by gathering a plural number of members, each of which has a “U”-like cross-section of an aspect ratio from 10 to 20, thereby diffusing the liquid coolant therein, so as to transfer the heat from the heat-generating element thereto with high efficiency, and thereby enabling to cool down the heat-generating element, fully, even with a relatively small amount or volume of the liquid coolant.

Claims

1. The cooling jacket for use in an electronic apparatus having a heat-generating element in a housing thereof, comprising:

a main body, being in contact with a surface of said heat-generating element, for transmitting heat generated within said heat-generating element to liquid coolant flowing therein;

a flow passage for the liquid coolant, being formed within an inside of said main body of the cooling jacket, being wound round therein;

an inlet and an outlet of the liquid coolant, being attached at both ends of flow passage of the liquid coolant; and

a dispersion member disposed in said flow passage being formed to be wound round, which is built up with a plural number of plate-like members piled up to be aligned in same direction within said flow passage of the liquid coolant;

wherein said flow passage of the liquid coolant is dispersed into a plural number of channels, and an aspect ratio of each of the channels, which are defined by said dispersion members between said dispersion members, lies in a range from 10 to 20; and

wherein said dispersion member is built up by gathering a plural number of tube-like members, each having an elliptical cross-section.

2. The cooling jacket, as is described in the claim 1, wherein further an opening is formed on a surface of said dispersion member.