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Fan system and its control device

A control device and fan system technology, applied in temperature control, non-electric variable control, control/regulation system, etc., can solve problems such as waste of energy, achieve the effect of protecting the overall operation, improving reliability and use efficiency

Active Publication Date: 2008-04-02
DELTA ELECTRONICS INC
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Problems solved by technology

However, when the thermistor RTH is not disconnected or disconnected, the lower the sensing temperature is, the greater the resistance value is. The value of the signal S1 will be greater than a set voltage inside the drive module 12, which will directly cause the motor 13 to rotate at full speed. The situation where the ambient temperature is low but the fan rotates at full speed is not only a waste of energy, but also inconsistent with the original design function. Run in the opposite direction

Method used

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  • Fan system and its control device
  • Fan system and its control device

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Embodiment Construction

[0031] A fan system and its control device according to preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0032] Please refer to FIG. 3 , a fan system 2 according to a preferred embodiment of the present invention includes a control device 21 and a motor 22 . In this embodiment, the control device 21 has a temperature sensing module 211 , a comparing module 212 and a driving module 213 .

[0033] The temperature sensing module 211 has a sensing element 2111, so it can sense an external temperature through the sensing element 2111, and then convert and generate a sensing signal S3 according to the temperature, and the sensing element 2111 does not have Limitation can be a thermistor in practice, and here the thermistor is a negative temperature coefficient (NTC) thermistor as an example; in addition, the sensing signal S3 is also unlimited, and can be used here is a voltage value.

[0034] The comparison modu...

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Abstract

The present invention relates to a control device of fan system and comprises a temperature sensing module, a comparison module and a driving module. The temperature sensing module senses external temperature and generates a sensing signal according to the external temperature; the comparison module receives the sensing signal and outputs a comparison signal according to the sensing signal and a reference voltage signal; the driving module which is electrically connected with the temperature sensing module and the comparison module respectively supplies a working voltage for the temperature sensing module and the comparison module, and also receives the sensing signal or the comparison signal and outputs a rotational speed control signal according the sensing signal or the comparison signal.

Description

technical field [0001] The invention relates to a system and its control device, in particular to a fan system and its control device. Background technique [0002] As the performance and processing speed of electronic devices increase, the integration of electronic components used increases, so the heat dissipation requirements are also greater. One way is to install fans in the electronic devices to dissipate heat. The fan's control device adjusts the fan's speed according to the ambient temperature, and is used to sense the temperature of the sensing element, such as a thermistor, which refers to a resistor that is sensitive to temperature changes and changes its resistance value as the temperature changes. According to the relationship between temperature and resistance value, it can be divided into two types of thermistors, positive temperature coefficient (PTC) and negative temperature coefficient (negative temperature coefficient, NTC). The resistance value increases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/20G05D23/24
Inventor 林侑良谢宗融黄跃龙蔡明熹
Owner DELTA ELECTRONICS INC
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