Cooling system

• US 20050077031A1
• Filed: 10/05/2004
• Published: 04/14/2005
• Est. Priority Date: 10/09/2003
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Inoue, Yoshimitsu, Morishita, Yusuke
• Application Number:
  US10/959,029
• Publication Number:
  US 20050077031A1
• Time in Patent Office: Days
• US Class Current: 165/104.310
• CPC Class Codes: B60K 2001/003 with means for cooling the electrical propulsion units
• 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

The maximum radiating value of a radiator (5) is not more than the maximum heat value of an IGBT (3). Even if the radiating capacity of the radiator (5) is not more than the maximum heat value of the IGBT (3), the temperature of cooling water returned to the heat absorber (4) can be maintained low and the size of the radiator (5) can be decreased because the increasing rate of the temperature of the cooling water returned to the heat absorber (4) is sufficiently smaller than that of the heating element (3), due to the heat capacity of the fluid, the heat absorber (4) and the radiator (5).

Claims

1. A cooling system for cooling a heating element, comprising

a heat absorber (4) which absorbs heat generated by the heating element (3), and transfers the absorbed heat to cooling fluid;

a radiator (5) which radiates heat of the fluid, to cool the fluid; and

piping means (6) which connects the heat absorber (4) and the radiator (5), to define a circulation passage through which the fluid circulates, wherein

the maximum radiating value of the radiator (5) is not more than the maximum heat value of the heating element (3).

2. A cooling system according to claim 1, further comprising a pump (7) which forcedly circulates the fluid between the radiator (5) and the heat absorber (4).

3. A cooling system which is applied to a vehicle having an electric motor (2) which generates a driving power, and which cools an electric circuit (3) supplying a driving electric current to the electric motor (2), comprising

a heat absorber (4) which absorbs heat generated by the electric circuit (3), and transfers the absorbed heat to cooling fluid;

a radiator (5) which radiates heat of the fluid, to cool the fluid; and

piping means (6) which connects the heat absorber (4) and the radiator (5), to define a circulation passage through which the fluid circulates, wherein

the maximum radiating value of the radiator (5) is not more than the maximum heat value of the electric circuit (3).

4. A cooling system according to claim 3, further comprising a pump (7) which forcedly circulates the fluid between the radiator (5) and the heat absorber (4).