Method for determining fluid flow characteristic curves of heat-dissipating system

• US 6,532,423 B2
• Filed: 02/05/2001
• Issued: 03/11/2003
• Est. Priority Date: 11/06/2000
• Status: Expired due to Fees

• Current Assignee: Delta Electronics Incorporated
• Original Assignee: Delta Electronics Incorporated
• Inventors: Chen, Yin-Yuan, Chen, Chih-Jen, Liao, Chia-Kuan
• Primary Examiner(s): Bui, Bryan
• Assistant Examiner(s): VO, HIEN XUAN
• Application Number:
  US09/777,489
• Publication Number:
  US 20020082782A1
• Time in Patent Office: 764 Days
• Field of Search: 702/45, 702/46, 702/47, 702/48, 702/49, 702/50, 702/57, 702/66, 702/99, 702/130, 702/136, 702/100, 73/530.4, 738/630.3
• US Class Current: 702/45
• CPC Class Codes: F28F 27/00 Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus control arrangements in general G05
• CPC Class Codes: H01L 23/467 by flowing gases, e.g. air H01L23/473 takes 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
• CPC Class Codes: H01L 2924/3011 Impedance
• CPC Class Codes: H05K 7/20172 Fan mounting or fan specifications

Abstract

A method for determining a plurality of fluid flow characteristic curves of a heat-dissipating system, wherein each fluid flow characteristic curve is a relationship curve of one of an air pressure and an air flow and the air pressure and a rotating speed of the heat-dissipating system. The method includes steps of (a) determining a first fluid characteristic curve of the heat-dissipating system at a first condition, (b) obtaining a first variable and a second variable according to the first fluid characteristic curve, (c) calculating relative values of the air pressure, the air flow, the first variable and the second variable for obtaining a plurality of coefficients of a specific equation, (d) determining a third variable and a fourth variable of the heat-dissipating system at a second condition, and (e) replacing the first variable and the second variable of the specific equation with the third variable and the fourth variable respectively for obtaining a second fluid characteristic curve of the heat-dissipating system at the second condition.

Claims

1. A method for determining a plurality of fluid flow characteristic curves of a heat-dissipating system, wherein each said fluid flow characteristic curve is a relationship curve of an air pressure and an air flow of said heat-dissipating system, comprising steps of:

(a) determining a first fluid characteristic curve of said heat-dissipating system at a first condition;

(b) defining a first variable and a second variable according to said first fluid characteristic curve;

(c) calculating relative values of said air pressure, said air flow, said first variable and said second variable for obtaining a plurality of coefficients of a specific equation;

(d) determining a third variable and a fourth variable of said heat-dissipating system at a second condition; and

(e) replacing said first variable and said second variable of said specific equation with said third variable and said fourth variable respectively for obtaining a second fluid characteristic curve of said heat-dissipating system at said second condition.

2. The method according to claim 1, wherein said heat-dissipating system is a fan.

3. The method according to claim 1, wherein said first variable is an air pressure of said heat-dissipating system at said first condition divided by a maximum value of said air pressure at said first condition.

4. The method according to claim 1, wherein said second variable is an air flow of said heat-dissipating system at said first condition divided by a maximum value of said air flow at said first condition.

5. The method according to claim 1, wherein said third variable is an air pressure of said heat-dissipating system at said second condition divided by a maximum value of said air pressure at said second condition.

6. The method according to claim 1, wherein said fourth variable is an air flow of said heat-dissipating system at said second condition divided by a maximum value of said air flow at said second condition.

7. The method according to claim 1, wherein said step (c) is performed by a data normalized analysis.

8. The method according to claim 1, wherein said second condition is at a voltage different from that of said first condition.

9. A recording medium for storing a program for executing a method for determining a plurality of fluid characteristic curves of a heat-dissipating system, wherein each said fluid characteristic curve is a relationship curve of an air pressure and an air flow of said heat-dissipating system, comprising steps of:

(a) determining a first fluid characteristic curve of said heat-dissipating system at a first condition;

(b) defining a first variable and a second variable according to said first fluid characteristic curve;

(c) calculating relative values of said air pressure, said air flow, said first variable and said second variable for obtaining a plurality of coefficients of a specific equation;

(d) determining a third variable and a fourth variable of said heat-dissipating system at a second condition; and

(e) replacing said first variable and said second variable of said specific equation with said third variable and said fourth variable respectively for obtaining a second fluid characteristic curve of said heat-dissipating system at said second condition.