FAN CONTROL SYSTEM AND METHOD
First Claim
1. A fan control method, comprising:
- controlling a level of power output of a fan module by a plurality of switches;
switching on one of the plurality of switches by sending a control signal from a programmable logical controller (PLC);
detecting an ambient temperature of the fan module and detecting an air pressure difference between a cold channel and a hot channel, wherein the fan module is communicated with the cold channel, and the cold channel is configured to input cool airflows to a heat element, and the hot channel is configured to output hot airflows from the heat element;
if an air pressure difference between the hot channel and the cold channel is smaller than a predefined value, switching the plurality of switches by the PLC to provide a higher power output to the fan module.
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Abstract
A fan control system includes an alternative current (A/C) source, a programmable logical controller (PLC), a switch module, and a fan module. The PLC includes a detecting module. The switch module is connected to the A/C source. The fan module is connected to the switch module. The fan module includes a plurality of fans. The PLC is adapted to control the switch module thereby changing a power level output to the fan module, according to an ambient temperature of the fan module and an air pressure difference between a cold channel and a hot channel of the fan module in turn. If the pressure difference is smaller than a predefined value, the plurality of switches are switched by the PLC to provide a higher power to the fan module.
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Citations
16 Claims
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1. A fan control method, comprising:
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controlling a level of power output of a fan module by a plurality of switches; switching on one of the plurality of switches by sending a control signal from a programmable logical controller (PLC); detecting an ambient temperature of the fan module and detecting an air pressure difference between a cold channel and a hot channel, wherein the fan module is communicated with the cold channel, and the cold channel is configured to input cool airflows to a heat element, and the hot channel is configured to output hot airflows from the heat element; if an air pressure difference between the hot channel and the cold channel is smaller than a predefined value, switching the plurality of switches by the PLC to provide a higher power output to the fan module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fan control system, comprising:
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an alternative current (A/C) source; a programmable logical controller (PLC), comprising a detecting module; a switch module connected to the A/C source; and a fan module connected to the switch module, and the fan module comprising a plurality of fans, wherein the PLC is adapted to control the switch module thereby changing a level of power output to the fan module, according to an ambient temperature of the fan module and an air pressure difference between a cold channel and a hot channel of the fan module;
the fan module is communicated with the cold channel, and the cold channel is configured to input cool airflows to a heat element, and the hot channel is configured to output hot airflows from the heat element, and if the air pressure difference is smaller than a predefined value, the plurality of switches are switched by the PLC to provide a higher level of power output to the fan module. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification