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Cooling Fan Velocity Control Apparatus Using Timer and Temperature Sensor

a technology of timer and temperature sensor, which is applied in the direction of pump control, non-positive displacement fluid engine, climate sustainability, etc., can solve the problem of not providing the method of actively controlling the velocity of the cooling fan based on an increase in the temperature, and the above method has a limitation on the control of the cooling fan in response, so as to improve the function of reducing noise of the cooling fan, reduce costs, and reduce heat generation

Inactive Publication Date: 2014-03-27
HANWHA SOLUTION & CONSULTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an apparatus for controlling the speed of a cooling fan based on the level of heat generated. This is done using a temperature sensor and a timer. The apparatus can reduce noise and lower costs while also improving the fan's ability to reduce heat.

Problems solved by technology

In most cases, set-top boxes (STBs) are basically operated at all times. Heat may be frequently generated in STBs, which may cause fire hazards.
However, in current STBs, a method of actively controlling a velocity of a cooling fan based on an increase in a temperature is not provided.
The above method has a limitation on controlling of a velocity of a cooling fan in response to an increase in an internal temperature of a product.
Additionally, when a cooling fan is set to rotate at a high velocity using a currently provided fan velocity control method, a level of generated noise may increase, as a rotative velocity increases.

Method used

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  • Cooling Fan Velocity Control Apparatus Using Timer and Temperature Sensor
  • Cooling Fan Velocity Control Apparatus Using Timer and Temperature Sensor
  • Cooling Fan Velocity Control Apparatus Using Timer and Temperature Sensor

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Embodiment Construction

[0024]Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Exemplary embodiments are described below to explain the present invention by referring to the figures.

[0025]Hereinafter, a cooling fan velocity control apparatus will be described in detail with reference to the accompanying drawings.

[0026]In a current set-top box (STB), an apparatus for actively controlling a velocity of a cooling fan based on an increase in an internal temperature is not provided. Typically, a microcontroller or a central processing unit (CPU) that has a function of a temperature sensor may perform pulse width modulation (PWM) on an internal signal, and may control a cooling fan. However, when a cooling fan needs to be used due to heating of a CPU that does not have the function of the temperature sensor, controlling of the velocity of th...

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Abstract

An apparatus and method for controlling a velocity of a cooling fan using a timer and a temperature sensor in a set-top box (STB) are provided. An apparatus for controlling a velocity of a cooling fan in an STB may include a temperature sensor unit to change a resistor to be in inverse proportion to an internal temperature, using a thermistor, a timer unit to generate a pulse signal using a capacitor and the resistor of the temperature sensor unit, a switching unit to turn on / off applied voltage, using the generated pulse signal, and a power source unit to apply the voltage to the switching unit.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Korean Patent Application No. 10-2012-0106836, filed on Sep. 26, 2012, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to an apparatus and method for controlling a velocity of a cooling fan using a timer and a temperature sensor in a set-top box (STB).[0004]2. Description of the Related Art[0005]In most cases, set-top boxes (STBs) are basically operated at all times. Heat may be frequently generated in STBs, which may cause fire hazards. Accordingly, to cool heat generated within an STB during an operation of the STB, a fan, namely a cooling fan, may be attached, and a rotative velocity of the cooling fan may be controlled to prevent performance from being reduced due to heat generation and to maximize the performance.[0006]However, in current STBs, a method of actively ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04D27/00
CPCF04D27/004F04D27/00Y02B30/70
Inventor KIM, MIN WANPARK, HEUNG SOO
Owner HANWHA SOLUTION & CONSULTING
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