CN204667231U - A kind of computer radiator control circuit - Google Patents

Abstract

The utility model discloses a control circuit for a computer radiator, which comprises a key switch K, a rectification and step-down module, a relay J and a chip IC1, one end of the key switch K is connected to the contact J-1 of the relay J and 220V alternating current, and the key switch The other end of K is connected to port 1 of the rectification and step-down module and the other end of contact J-1 of relay J, and port 2 of the rectification and step-down module is connected to the other end of 220V AC. The control circuit of the utility model uses the MC34717 high-performance switching power supply chip as the control element, which has the advantages of fast response, precise control and long life, and the circuit can indicate the situation of low voltage, preventing the radiator and the computer from working at low voltage for a long time Therefore, the circuit has the advantages of simple structure, stable performance and various functions.

Description

A computer radiator control circuit

technical field

The utility model relates to a control circuit, in particular to a computer radiator control circuit.

Background technique

Common computers include desktops and notebooks, but no matter what kind of computer there is a problem of poor heat dissipation, especially in the hot summer, it is easy to cause the computer hardware to burn out due to overheating, and some computers with overheating protection will be damaged due to overheating. Automatic shutdown due to overheating may cause loss of important data, which brings great inconvenience to users. Most of the current radiators only have the function of simply turning on and off, and most of them use relays as switching elements, which have high noise and low life, which affects the heat dissipation performance.

Utility model content

The purpose of this utility model is to provide a computer radiator control circuit to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A computer radiator control circuit, comprising a key switch K, a rectifying step-down module, a relay J and a chip IC1, one end of the key switch K is connected to the contact J-1 of the relay J and 220V alternating current, and the other end of the key switch K is Connect port 1 of the rectification and step-down module to the other end of contact J-1 of relay J, port 2 of the rectification and step-down module is connected to the other end of 220V AC, and port 3 of the rectification and step-down module is connected to resistor R1, resistor R4, potential One fixed end of the resistor RP and the relay J, the other end of the resistor R1 is connected to the capacitor C, the resistor R5, the thermistor RT, the pin 3 of the chip IC1 and the pin 3 of the chip IC2, and the other fixed end of the potentiometer RP is connected to The sliding end of resistor R2 and potentiometer RP, the other end of resistor R2 is connected to resistor R3, the other end of capacitor C and pin 1 of chip IC2, the other end of thermistor RT is connected to the other end of resistor R3, resistor R5, resistor R6, resistor R8, cathode of diode D1, cathode of diode D2, fan A, the other end of relay J, port 4 of the rectifier and step-down module, pin 1 of chip IC1, pin 4 of chip IC2 and lead of chip IC3 Pin 3, the other end of resistor R4 is connected to the other end of resistor R6 and pin 6 of chip IC3, pin 4 of chip IC1 is connected to resistor R7, and the other end of resistor R7 is connected to the other end of resistor R8 and pin 4 of chip IC3 The pin 1 of the chip IC3 is connected to the resistor R10 and the other end of the fan A, the pin 5 of the chip IC3 is connected to the resistor R9, the other end of the resistor R9 is connected to the anode of the diode D1, and the other end of the resistor R10 is connected to the anode of the diode D2.

As a preferred solution of the utility model: the relay J is a normally open contact relay.

As a preferred solution of the present invention: the models of the chip IC1 and the chip IC2 are both LM321, and the model of the chip IC3 is MC34717.

As a preferred solution of the present utility model: both the diode D1 and the diode D2 are light emitting diodes.

Compared with the prior art, the beneficial effect of the utility model is: the control circuit of the utility model uses the MC34717 high-performance switching power supply chip as the control element, which has the advantages of fast response, precise control and long life, and the circuit can be used for low voltage Instructions can be made to prevent damage to radiators and computers caused by working under low voltage for a long time. Therefore, the circuit has the advantages of simple structure, stable performance and multiple functions.

Description of drawings

Figure 1 is a circuit diagram of a computer radiator control circuit.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, a computer radiator control circuit, including a key switch K, a rectifying step-down module, a relay J and a chip IC1, one end of the key switch K is connected to the contact J-1 of the relay J and 220V alternating current, the key The other end of the switch K is connected to the port 1 of the rectifying step-down module and the other end of the contact J-1 of the relay J, the port 2 of the rectifying step-down module is connected to the other end of 220V AC, and the port 3 of the rectifying step-down module is connected to the resistor R1 , resistor R4, a fixed end of potentiometer RP and relay J, the other end of resistor R1 is connected to capacitor C, resistor R5, thermistor RT, pin 3 of chip IC1 and pin 3 of chip IC2, and the other end of potentiometer RP The other fixed end is connected to the sliding end of the resistor R2 and the potentiometer RP, the other end of the resistor R2 is connected to the resistor R3, the other end of the capacitor C and pin 1 of the chip IC2, and the other end of the thermistor RT is connected to the other end of the resistor R3 , resistor R5, resistor R6, resistor R8, cathode of diode D1, cathode of diode D2, fan A, the other end of relay J, port 4 of rectifier and step-down module, pin 1 of chip IC1, pin 4 of chip IC2 And the pin 3 of the chip IC3, the other end of the resistor R4 is connected to the other end of the resistor R6 and the pin 6 of the chip IC3, the pin 4 of the chip IC1 is connected to the resistor R7, and the other end of the resistor R7 is connected to the other end of the resistor R8 and the chip Pin 4 of IC3, pin 1 of chip IC3 is connected to resistor R10 and the other end of fan A, pin 5 of chip IC3 is connected to resistor R9, the other end of resistor R9 is connected to the anode of diode D1, and the other end of resistor R10 is connected to diode Anode of D2.

Relay J is a normally open contact relay. The models of the chip IC1 and the chip IC2 are both LM321, and the model of the chip IC3 is MC34717. Both diode D1 and diode D2 are light emitting diodes.

The working principle of the utility model is: press the key switch K when in use, the 220V alternating current becomes a stable direct current to supply power to the control circuit after passing through the rectifying step-down module, and the relay J pulls in, at this time even if the key K is released, the circuit can also maintain Power supply, when the temperature of the computer rises, the resistance value of the thermistor RT becomes smaller, so that the amplifier IC2 outputs a high level, and the amplifier IC1 outputs a high level, which is added to the switching power supply chip IC3 after the voltage is divided by the resistor R7 and the resistor R8. The input terminal connects the positive power supply terminal 6 pin of the switching power supply chip IC3 with the output terminal 1 pin of the switching power supply chip IC3, the switching power supply chip IC3 outputs 12V voltage, and the light-emitting diode D2 lights up, indicating that the radiator is working normally, and the computer temperature gradually drops When the set temperature is reached, the temperature control circuit stops working. When the cooling fan A fails or the voltage is too low, the diagnostic terminal 5 pin of the switching power supply chip IC3 outputs 5V voltage, and the light-emitting diode D1 lights up, indicating that the radiator cannot work normally. The circuit uses MC34717 high-performance switching power supply chip as the control element, which has the advantages of fast response, precise control and long life, and the circuit can indicate the situation of low voltage to prevent damage caused by the radiator and computer working under low voltage for a long time , so the circuit has the advantages of simple structure, stable performance and various functions.

Claims (4)

1. a computer radiator control circuit, comprises keyswitch K, rectification voltage reduction module, relay J and chip IC 1, it is characterized in that, one end of described keyswitch K connects contact J-1 and the 220V alternating current of relay J, the other end of keyswitch K connects the other end of the port one of rectification voltage reduction module and the contact J-1 of relay J, the port 2 of rectification voltage reduction module connects the other end of 220V alternating current, the port 3 contact resistance R1 of rectification voltage reduction module, resistance R4, a stiff end of potentiometer RP and relay J, the other end of resistance R1 connects electric capacity C, resistance R5, thermistor RT, the pin 3 of chip IC 1 and the pin 3 of chip IC 2, another stiff end contact resistance R2 of potentiometer RP and the sliding end of potentiometer RP, the other end contact resistance R3 of resistance R2, the other end of electric capacity C and the pin 1 of chip IC 2, the other end of the other end contact resistance R3 of thermistor RT, resistance R5, resistance R6, resistance R8, the negative electrode of diode D1, the negative electrode of diode D2, fan A, the other end of relay J, the port 4 of rectification voltage reduction module, the pin 1 of chip IC 1, the pin 4 of chip IC 2 and the pin 3 of chip IC 3, the other end of other end contact resistance R6 of resistance R4 and the pin 6 of chip IC 3, the pin 4 contact resistance R7 of chip IC 1, the other end of other end contact resistance R8 of resistance R7 and the pin 4 of chip IC 3, the pin 1 contact resistance R10 of chip IC 3 and the other end of fan A, the other end of the pin 5 contact resistance R9 of chip IC 3, resistance R9 connects the anode of diode D1, and the other end of resistance R10 connects the anode of diode D2.

2. a kind of computer radiator control circuit according to claim 1, is characterized in that, described relay J is normally opened contact relay.

3. according to a kind of computer radiator control circuit according to claim 1, it is characterized in that, the model of described chip IC 1 and chip IC 2 is LM321, and the model of described chip IC 3 is MC34717.

4. according to a kind of computer radiator control circuit according to claim 1, it is characterized in that, described diode D1 and diode D2 is light emitting diode.