Patent ID: 8375733
Filing Date: 2013-02-19
Classification: F24F,F25B,Y02B

Abstract:
1. A low-noise fan control system, comprising: a variable-speed fan for venting a device with a fluid passing therein and in thermal contact therewith, a temperature of the fluid being controlled at least partly by the venting action of the variable-speed fan; a temperature sensor to measure the temperature of the fluid at an outlet of the device; and a calculator electrically connected to the variable-speed fan for calculating a signal drive of the variable-speed fan to regulate the speed of the fan calculated using an algorithm running in a memory of the calculator comprising the steps of: determining a initial fan regulation variable; sending to the variable-speed fan a first regulation variable; and sending at regular time increments a new regulation variable to the variable-speed fan by measuring a setpoint of the device, measuring the temperature at the sensor, and calculating a first error value based of the temperature at the sensor and the setpoint of the device.