Fan time delay control circuit
A delay control and delay circuit technology, which is applied in pump control, non-variable pumps, machines/engines, etc., can solve the problems that waste heat cannot be dissipated quickly, affects the normal operation of equipment, and shortens the service life of fans, etc. , to achieve the effect of low manufacturing cost, reasonable design and extended service life
Inactive Publication Date: 2011-04-06
TIANJIN NUOER TRANSMISSION ELECTRICAL EQUIP
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Problems solved by technology
[0002] At present, in the general fan power supply circuit, since there is no delay control circuit, the fan keeps running after the device is powered on, which not only wastes energy but also greatly reduces the service life of the fan. However, if only the operation control signal is added To control whether the fan is running or not, this will also cause another problem, that is, the fan will stop immediately when the overheating shutdown occurs, which will cause the residual heat to not be dissipated quickly, and will also affect the normal operation of the equipment; but if you add The delay control circuit of the fan can well solve the unfavorable factors during operation under the above conditions
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[0008] Below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure and features provided according to the present invention are described in detail as follows:
[0009] see figure 1 , a fan delay control circuit, characterized in that the control circuit is composed of an input circuit, a delay circuit, a comparison circuit and an optocoupler isolation circuit; the delay circuit includes a resistor R1, an electrolytic capacitor E1 and a capacitor C2; The comparison circuit includes resistors R1, R2, R6, capacitor C3 and comparison amplifier U2A; the optocoupler isolation circuit includes resistor R3 and optocoupler isolation device O1; the resistors R1 and R2 of the delay circuit are connected to the power supply Terminal +5V; input signal STATUS is connected to terminal 1 of operational amplifier U1A, pin 14 of operational amplifier U1A is connected to the power supply terminal, and pin 7 is grounded; terminal 2 of ope...
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The invention relates to a fan time delay control circuit which is formed by connecting an input end circuit, a time delay circuit, a comparison circuit and an optically coupled isolation circuit, wherein the time delay circuit is composed of a resistor R1, an electrolytic capacitor E1, a capacitor C2; the comparison circuit is formed by connecting resistors R1, R2 and R6, a capacitor C3 and a comparison amplifier U2A; and the optically coupled isolation circuit is formed by connecting a resistor R3 and an optically coupled isolation device O1. The circuit of the invention has simple structure, is reasonably designed, is suitable for requirements of various time delay time parameters, and has low manufacture cost, strong applicability and stable and reliable performance; and by using the control circuit, the energy is saved, the consumption is lowered, the service life of the fan is greatly prolonged, the normal operation of equipment is effectively ensured and the application range is wide.
Description
technical field [0001] The invention relates to a fan control circuit, in particular to a fan delay control circuit. Background technique [0002] At present, in the general fan power supply circuit, since there is no delay control circuit, the fan keeps running after the device is powered on, which not only wastes energy but also greatly reduces the service life of the fan. However, if only the operation control signal is added To control whether the fan is running or not, this will also cause another problem, that is, the fan will stop immediately when the overheating shutdown occurs, which will cause the residual heat to not be dissipated quickly, and will also affect the normal operation of the equipment; but if you add The delay control circuit of the fan can well solve the unfavorable factors during operation under the above-mentioned conditions. [0003] Therefore, providing a fan delay control circuit with simple structure, reasonable design, simple application and ...
Claims
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IPC IPC(8): F04D27/00
Inventor 王少军韩永清杨勇张耀军张伟华祁虎威王永强
Owner TIANJIN NUOER TRANSMISSION ELECTRICAL EQUIP