Temperature control device and control method thereof

Patent metadata

Field	Value
Publication number	US-11032938-B2
Application number	US-201815867408-A
Country	US
Kind code	B2
Filing date	Jan 10, 2018
Priority date	Oct 27, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A temperature control device comprises a fan, a temperature sensor, a modeling circuit and a PID controller, with the PID controller connected with the fan, the temperature sensor and the modeling circuit. The fan drives airflows for controlling the temperature of a controlled region. The temperature sensor is disposed in the controlled region and obtains a detected temperature indicating the temperature of the controlled region. The modeling circuit obtains at least one cooling parameter group based on a transfer function. The PID controller controls the fan based on an initial parameter group when the detected temperature is lower than a first temperature, and controls the fan based on said at least one cooling parameter group when the detected temperature is equal to or higher than the first temperature. The initial parameter group comprises initial parameters, with the value of each of the initial parameters equal to a preset value.

First claim

What is claimed is:

1. A temperature control device, comprising:
a fan configured to drive airflows for controlling a temperature of a controlled region;
a temperature sensor disposed in the controlled region and obtaining a detected temperature, with the detected temperature indicating the temperature of the controlled region;
a modeling circuit obtaining at least one cooling parameter group based on a transfer function; and
a PID controller connected to the fan, the temperature sensor and the modeling circuit with respect to a temperature threshold so as to approach but not exceed the temperature threshold, controlling the fan based on an initial parameter group when the detected temperature is lower than a first temperature and the temperature threshold, and controlling the fan based on a first parameter group of said at least one cooling parameter group when the detected temperature is equal to or higher than the first temperature and lower than a second temperature as the detected temperature approaches the temperature threshold, and controlling the fan based on a second parameter group of said at least one cooling parameter group for reducing a variation of the speed of the fan when the detected temperature is equal to or higher than the second temperature and the temperature further approaches the temperature threshold;
wherein the initial parameter group comprises a plurality of initial parameters, with a value of each of the plurality of initial parameters equal to a preset value, and
wherein the first temperature is 0.63 times as high as the threshold temperature and the second temperature is 97% of the threshold temperature.

2. The temperature control device according to claim 1 , configured to control an environment temperature or a component temperature to be lower than the threshold temperature, wherein the temperature sensor obtains the detected temperature according to the environment temperature or the component temperature.

3. The temperature control device according to claim 1 , wherein the preset value is zero.

4. The temperature control device according to claim 1 , wherein the first parameter group of said at least one cooling parameter group is obtained by the modeling circuit.

5. The temperature control device according to claim 1 , wherein the second parameter group of said at least one cooling parameter group is obtained by the modeling circuit, the modeling circuit obtains the second parameter group by performing calculation based on the first parameter group and a preset ratio by the modeling circuit, and the second temperature higher than the first temperature.

6. A control method of a temperature control device, with the temperature control device comprising a PID controller and a fan and configured to control a temperature of a controlled region, and the control method comprising:
obtaining at least one cooling parameter group based on a transfer function;
obtaining a detected temperature indicating the temperature of the controlled region;
setting a plurality of control parameters of the PID controller with respect to a temperature threshold so as to approach but not exceed the temperature threshold based on an initial parameter group to control a speed of the fan when the detected temperature is lower than a first temperature and the temperature threshold, with the initial parameter group comprising a plurality of initial parameters of which a quantity is equal to a quantity of the plurality of control parameters, and a value of each of the plurality of initial parameters equal to a preset value; and
setting the plurality of control parameters of the PID controller with respect to the temperature threshold so as to approach but not exceed the temperature threshold based on a first parameter group of said at least one cooling parameter group when the detected temperature is equal to or higher than the first temperature and lower than a second temperature as the detected temperature approaches the temperature threshold;
setting the plurality of control parameters of the PID controller based on a second parameter group of said at least one cooling parameter group for reducing a variation of the speed of the fan when the detected temperature is equal to or higher than the second temperature as the detected temperature approaches the temperature threshold, and
wherein the first temperature is 0.63 times as high as the threshold temperature and the second temperature is 97% of the threshold temperature.

7. The control method according to claim 6 , wherein the temperature control device is configured to control an environment temperature or a component temperature to be lower than the threshold temperature, the detected temperature is related to the environment temperature or the component temperature.

8. The control method according to claim 6 , wherein the preset value is zero.

9. The control method according to claim 6 , wherein obtaining said at least one cooling parameter group based on the transfer function comprises:
calculating a first parameter group based on the transfer function; and
calculating a second parameter group based on the first parameter and a preset ratio;
wherein the second temperature is higher than the first temperature.

Assignees

• Inventec Pudong Tech Corp
• Inventec Corp

Inventors

• Lee Cheng-Ming
• Tung Kai-Yang
• Lin Mao-Ching

Classifications

• H05K7/20836 Primary

  Thermal management, e.g. server temperature control · CPC title

• G05D23/00

  Control of temperature · CPC title

• H05K7/20172

  Fan mounting or fan specifications · CPC title

• F04D27/004 Primary

  by varying driving speed · CPC title

• H05K7/20718

  Forced ventilation of a gaseous coolant (in closed loop H05K7/20754) · CPC title