CN2539219Y - Computer case cooling fan - Google Patents

Abstract

The utility model relates to a computer equipment technical field refers in particular to a computer machine case radiator fan. The technical scheme is as follows: the fan is connected in a temperature control circuit. After the device is adopted, the voltage at the two ends of the fan is controlled by the temperature control circuit, and the input voltage of the fan is automatically adjusted according to the temperature in the case, so that the rotating speed of the fan is adjusted, and the temperature in the case is kept in a relatively stable state.

Description

Computer case cooling fan

Technical field:

The utility model relates to the technical field of computer equipment, in particular to a cooling fan for a computer case.

Background technique:

With the continuous advancement of modern technology, computer equipment is also developing rapidly. Today, the main frequency of the CPU (Central Processing Unit) in a computer can exceed 1GMHz, and various graphics accelerator cards enable computer enthusiasts to enjoy more realistic 3D images. The chips in these devices have very strict temperature requirements, and a little carelessness may burn the chips. Therefore, heat sinks or fans are generally added to these chips. But because the equipment in the computer is generally placed in the computer case, in order to protect it from the influence of external factors, the general airtightness of the case is relatively strict, so that the temperature in the case is difficult to reduce. When the temperature in the entire case is high, it will affect the operation of the computer equipment, especially in hot summer weather. In view of this situation, some computer manufacturers have added a heat dissipation fan in the computer case, see accompanying drawing 1, this is the function figure of the relation between the rotating speed of general fan and temperature at present, and its rotating speed is fixed, will not change with time. The temperature changes, that is, the purpose of regulating the temperature cannot be achieved, and the temperature in the chassis is in an unstable state.

Purpose of the invention:

The purpose of the utility model is to provide a computer case cooling fan which can adjust the speed of the fan according to the temperature in the case. Invention content:

The utility model is realized through the following technical scheme: the fan is connected in a temperature control circuit.

After using this device, the voltage at both ends of the fan will be controlled by the temperature control circuit, and the input voltage of the fan will be automatically adjusted according to the temperature in the chassis, thereby adjusting the speed of the fan to keep the temperature in the chassis at a relatively stable state.

Description of drawings:

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the T-V relationship function figure of existing product;

Fig. 2 is the schematic diagram of the utility model;

Fig. 3 is the circuit diagram of the present utility model;

Fig. 4 is a T-V relationship function diagram of an embodiment of the present invention.

Detailed ways:

See accompanying drawings 2 and 3, the utility model mainly connects an ordinary fan in a temperature control circuit, and its circuit connection mode is: the capacitor C is connected in parallel with the Zener diode ZD, and the two ends are respectively connected to one end of the resistor R1 and At the ground terminal, the other end of resistor R1 is connected to the power input end; one end of resistor R2 is connected to the line between resistor R1 and Zener diode D, and the other end is connected to the base of transistor Q1, between the base of transistor Q1 and There is a thermistor 4 connected between the ground terminals; the resistor R3 is connected between the collector of the transistor Q1 and the power input terminal, the emitter of the transistor Q1 is connected to the ground terminal, and the base of the transistor Q2 is connected to the collector of the transistor Q1 , its collector is connected to the input terminal of the power supply, and a resistor R4 is connected between its emitter and the input terminal of the power supply. The fan 1 is connected between the emitter terminal of the transistor Q2 and the ground terminal; the resistor R5 is connected to the emitter of the transistor Q2. between the transistor Q3 base and the base of the transistor Q3, the resistor 7 is connected to the base and the ground terminal of the transistor Q3, and the resistor R6 and the display Lamp L.

The entire circuit is basically placed inside the fan 1 , wherein a small through hole 2 is opened on the fan 1 , and the thermistor 4 can sense the temperature through the through hole 2 .

When the utility model is used, the power interface of the fan 1 is connected with the power supply in the case, and the display lamp L is pulled out of the case, so that the user can observe. When the power is turned on, the fan 1 starts to work. Because the circuit of the present utility model is mainly a series voltage regulating circuit, the current and voltage at both ends of the fan are changed through the change of the resistance value of the thermistor 4 so as to change the rotating speed of the fan; wherein the Zener diode is used for controlling and stabilizing the voltage, The capacitor C has the function of suppressing interference; and the messenger can know whether the fan is working or not by displaying the light L.

Below is a specific embodiment of the utility model, wherein the specifications of each element are as follows: product name Specification product name Specification product name Specification R1 220 euros R6 1 kohms Q1 KSP2222 R2 0.8 kohms R7 4.3 kohm Q2 KSP2222 R3 1 kohms C 100UF/10V Q3 KSP2222 R4 470 euros ZD 5V 0.5W 1 12V R5 10 kohms L / 4 202

See accompanying drawing 4, which is the T-V relationship function diagram of this embodiment, wherein the abscissa represents the temperature T; the ordinate represents the rotational speed V of the fan 1 . It can be seen that the rotational speed V of the fan 1 changes with the temperature T.

The utility model will automatically adjust the rotating speed of the fan according to the temperature in the cabinet, so that the temperature in the cabinet can be kept in a relatively stable state. Equally the utility model also can be used in various computer equipments such as CPU, image acceleration card, chassis power supply.

Claims (2)

1. A cooling fan for a computer case, characterized in that the fan (1) is connected to a temperature control circuit, that is, the fan (1) is connected to an external power supply through a temperature control circuit. 2. A cooling fan for a computer case according to claim 1, characterized in that the temperature control circuit is that the capacitor C is connected in parallel with the Zener diode ZD, and the two ends are respectively connected to one end of the resistor R1 and the ground The other end of the resistor R1 is connected to the power input end; one end of the resistor R2 is connected to the line between the resistor R1 and the Zener diode ZD, and the other end is connected to the base of the transistor Q1, between the base of the transistor Q1 and A thermistor (4) is connected between the ground terminals; the resistor R3 is connected between the collector of the transistor Q1 and the power input terminal, the emitter of the transistor Q1 is connected to the ground terminal, the base of the transistor Q2 is connected to the collector of the transistor Q1 The electrodes are connected, the collector is connected to the power input terminal, and a resistor R4 is connected between the emitter and the power input terminal, and the fan (1) is connected between the emitter and the ground terminal of the triode Q2; the resistor R5 is connected to Between the emitter of the transistor Q2 and the base of the transistor Q3, the resistor 7 is connected to the base of the transistor Q3 and the ground terminal, and the power input terminal is connected to the collector of the transistor Q3 and its emitter and the ground terminal respectively. Resistor R6 and display lamp L.

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