Automatic control circuit of machine room fan
An automatic control circuit and start-up circuit technology, applied in pump control, machine/engine, mechanical equipment, etc., can solve the problems of fan loss, untimely start or stop fan operation, waste of power resources, etc., and achieve the effect of improving quality
Active Publication Date: 2015-05-20
SEMICON MFG INT (SHANGHAI) CORP +1
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Problems solved by technology
In this way of artificially controlling the operation of the fan, it will inevitably lead to the untimely operation of starting or stopping the fan.
Furthermore, if the fan is not turned on in time, to a certain extent, the computer room cannot be ventilated and dissipated in time, causing the temperature of the computer room to be too high, resulting in frequent equipment failures in the computer room; if the fan is not stopped in time and allowed to work continuously, it will cause the fan to fail Unnecessary loss and massive waste of power resources
Method used
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Embodiment 1
[0033] Figure 1 to Figure 4 Shows a specific implementation of the automatic control circuit of the machine room fan of the present invention, an automatic control circuit of the machine room fan, including figure 1 As shown, the starting circuit that controls the starting of the fan when the machine room is at the first temperature and above, and includes figure 2 As shown, the stop circuit that controls the fan to stop when the machine room is at or below the second temperature, the second temperature is lower than the first temperature; wherein,
[0034] according to figure 1As shown, the starting circuit includes: a first thermistor RT1, a first adjustable resistor Rk1, a first fixed value resistor R1a, a second fixed value resistor R1b, a first voltage comparison circuit and a first relay C1, the The first voltage comparison circuit includes a first voltage comparator U1 and a first voltage converter Q1; the first terminal and the second terminal of the first voltage ...
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The invention provides an automatic control circuit of a machine room fan. The automatic control circuit comprises a starting circuit and a stopping circuit; the starting circuit and the stopping circuit respectively comprise a thermistor, an adjustable resistor, a voltage comparison circuit and a relay; the thermistor and the adjustable resistor are arranged in parallel connection; and the voltage comparison circuit can be used for comparing the voltage of the thermistor with the voltage at the low-voltage end of the adjustable resistor and outputting low-level signals to make the fan relay, which is used for controlling the fan to be started or stopped, act. According to the automatic control circuit provided by the invention, by comprehensively utilizing the combination of a temperature sensing resistor (the thermistor) and a logic comparison integrated circuit, the operation of ventilation equipment in a machine room can be automatically controlled effectively along with the change of the ambient temperature, so that the ambient temperature of the machine room can be controlled to a certain extent, and the quality of air circulating inside the machine room and the suitability degree for an operator to operate in the machine room are improved.
Description
technical field [0001] The invention relates to a control circuit, in particular to an automatic control circuit of a machine room fan. Background technique [0002] Equipment in the computer room, such as elevator host motors, frequency converters and other high-power equipment, will emit a lot of heat when they are working, but the computer room is relatively closed, and the ventilation equipment in the computer room is in the standby manual switch start state; the high-power equipment in the computer room is in a state of natural heat dissipation, which will cause relative overheating in some places , especially during the high temperature period in summer, if cooling measures are not taken, it will cause frequent equipment failures in the computer room. [0003] Some computer rooms are equipped with air conditioners, which can effectively control the temperature of the computer room. However, the price of air-conditioning equipment is relatively expensive, which will in...
Claims
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IPC IPC(8): F04D27/00
Inventor 徐忠勇
Owner SEMICON MFG INT (SHANGHAI) CORP