COOLER

• US 20130025837A1
• Filed: 06/07/2011
• Published: 01/31/2013
• Est. Priority Date: 06/07/2011
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Takenaga, Tomohiro
• Application Number:
  US13/581,718
• Publication Number:
  US 20130025837A1
• Time in Patent Office: Days
• US Class Current: 165/168
• CPC Class Codes: H01L 23/473 by flowing liquids H01L23/4332, H01L23/4338 take precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

A cooler includes a plate, a cooling case having a coolant flowing therein, and a plurality of wavy fins having a raised curved portion and a lowered curved portion formed alternately on a side face in a flow direction of the coolant. In this cooler, the coolant flows through between the raised curved portion and the lowered curved portion opposite to each other in a meandering manner. The raised curved portion is provided with a bank creating a flow of coolant from the raised curved portion toward the opposite lowered curved portion. With this bank, a part of a main stream of the coolant can be mixed with the coolant stagnating near the lowered curved portion, whereby the heat transfer coefficient of the wavy fins can be improved. Thus, stagnation of the coolant near the lowered curved portion can be prevented, so that the cooler can have enhanced cooling performance.

Claims

1. A cooler including:

a plate connected to a semiconductor device;

a cooling case covered with the plate and having a coolant flowing therein; and

wavy fins connected to the plate, each wavy fin having a raised curved portion and a lowered curved portion formed alternately on a side face of the wavy fin in a flow direction of the coolant, the coolant flowing through between the raised curved portion and the lowered curved portion of the adjacent wavy fins opposite to each other in a meandering manner,

wherein the raised curved portion is provided with a stagnation preventing member for creating a flow of coolant from the raised curved portion toward the opposite lowered curved portion, the stagnation preventing member being provided at a base portion of the raised curved portion on a semiconductor device side in a thickness direction of the wavy fins.

3. The cooler according to claim 1, wherein the stagnation preventing member is a tapered bank tapering toward a bottom wall of the cooling case.

4. The cooler according to claim 1, the stagnation preventing member is a protrusion protruding from the raised curved portion toward the opposite lowered curved portion.

5. The cooler according to claim 1, wherein a second stagnation preventing member for creating a flow of coolant from the raised curved portion toward the opposite lowered curved portion is provided, the second stagnation preventing member being positioned at a distal portion of the raised curved portion on a side of the bottom wall of the cooling case in a thickness direction of the wavy fins.

6. The cooler according to claim 3, wherein a second stagnation preventing member for creating a flow of coolant from the raised curved portion toward the opposite lowered curved portion is provided, the second stagnation preventing member being positioned at a distal portion of the raised curved portion on a side of the bottom wall of the cooling case in a thickness direction of the wavy fins.

7. The cooler according to claim 4, wherein a second stagnation preventing member for creating a flow of coolant from the raised curved portion toward the opposite lowered curved portion is provided, the second stagnation preventing member being positioned at a distal portion of the raised curved portion on a side of the bottom wall of the cooling case in a thickness direction of the wavy fins.

2. (canceled)