Dustproof circuit for optimizing rotating speed of fan

Abstract

The utility model discloses a dustproof circuit for optimizing the rotating speed of a fan, which relates to the technical field of voltage withstanding instrument control circuits and comprises a battery module for supplying power to a working power supply and a driving module for controlling the on-off of a relay coil, the relay module is used for controlling the switching of relay contacts to determine the operation of the fan; the protection module is used for preventing the relay coil from generating reverse high-voltage current; the output end of the power module is connected with the input end of the relay module, the output end of the driving module is connected with one end of a coil of the relay module, and the other end of the coil of the relay module is connected with one end of the protection module. According to the utility model, the rotation time of the fan is accurately controlled, so that the dustproof function of the voltage withstanding instrument is effectively realized; when the voltage withstanding instrument is started but is not tested, the fan is kept in a closed state, and a large amount of dust in a workshop is prevented from being sucked due to long-time operation, so that accumulation of the dust in the instrument is reduced, and operation faults and test errors caused by static accumulation are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pressure instrument control circuit, specifically, relate to a kind of circuit of fan speed dust prevention optimization. BACKGROUND

[0002] At present, the use environment of pressure instrument is often in harsh conditions. First, there are usually a lot of dust and pollutants in the test site, which not only increases the difficulty of cleaning the equipment, but also may affect its normal operation. After dust enters the interior of the pressure instrument, it will accumulate on each circuit board along with air flow, especially near the fan and radiator. Since the fan runs for a long time at high power during the equipment cooling process, the dust in the air is more likely to be sucked into the interior of the equipment, thereby covering the surface of each PCB. The accumulation of dust not only reduces the cooling efficiency of the equipment, but also may cause electrical contact failure, short circuit or circuit failure, etc., affecting the long-term stability of the equipment.

[0003] In addition, high temperature on site is also a factor that cannot be ignored. The pressure instrument usually needs to work for a long time in high temperature environment, and the temperature rise will cause the temperature rise of internal components, especially the power board part. In this case, in order to reduce the temperature of the power board, the equipment usually needs to use a larger power cooling fan for cooling. However, the high-power operation of the fan will increase the wind speed, thereby promoting more dust into the interior of the equipment, aggravating the problem of dust accumulation. With the continuous accumulation of dust, these particles may cause electrostatic effect, interfere with the normal work of the equipment, and even affect the test accuracy.

[0004] The existence of static electricity will have adverse effects on the circuit system of the pressure instrument, especially during high-precision testing, electrostatic discharge may cause inaccurate measurement results, or even damage the precision electronic components of the equipment. In order to ensure the accuracy of the test and the long-term stable operation of the equipment, effective measures must be taken to solve this problem.

[0005] At present, there is no effective solution to the problems in the related art. UTILITY MODEL CONTENT

[0006] In view of the problems in the related art, the utility model provides a circuit for optimizing fan speed and dust prevention to overcome the above technical problems existing in the prior art.

[0007] Therefore, the utility model adopts the following specific technical solutions:

[0008] A circuit for optimizing fan speed and dust prevention, comprising:

[0009] a battery module for providing working power supply,

[0010] A driving module for controlling the on-off of the relay coil;

[0011] A relay module for controlling the switching of the relay contact to determine the operation of the fan;

[0012] A protection module for preventing the generation of reverse high-voltage current in the relay coil;

[0013] The output end of the power module is connected with the input end of the relay module, the output end of the driving module is connected with one end of the coil of the relay module, and the other end of the coil of the relay module is connected with one end of the protection module.

[0014] Further, the power module comprises a connector CON3, wherein the first pin of the connector CON3 is connected with the +12_FS signal, and the third pin of the connector CON3 is grounded.

[0015] Further, the driving module comprises a triode Q1, a resistor R2 and a resistor R3, wherein one end of the resistor R2 is connected with the control signal FS, the other end of the resistor R2 is respectively connected with one end of the resistor R3 and the base of the triode Q1, the other end of the resistor R3 is connected with the emitter of the triode Q1 and grounded, and the collector of the triode Q1 is connected with the relay module and the protection module.

[0016] Further, the relay module comprises a relay RY1, wherein the eighth pin of the relay RY1 is connected with the +12_FS signal, the ninth pin of the relay RY1 is connected with the +12_1V signal, the twelfth pin of the relay RY1 is respectively connected with the collector of the triode Q1 and one end of the protection module, and the first pin of the relay RY1 is connected with the other end of the protection module.

[0017] Further, the protection module comprises a diode D5, wherein the anode of the diode D5 is respectively connected with the collector of the triode Q1 and the twelfth pin of the relay RY1, and the cathode of the diode D5 is connected with the first pin of the relay RY1.

[0018] The utility model discloses a driving module for controlling the on-off of the relay coil, a relay module for controlling the switching of the relay contact to determine the operation of the fan, a protection module for preventing the generation of reverse high-voltage current in the relay coil, and a power module. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0020] Figure 1 is a principle block diagram of the circuit for optimizing fan rotating speed dust prevention according to the embodiment of the present application;

[0021] Figure 2 is a circuit principle diagram of the circuit for optimizing fan rotating speed dust prevention according to the embodiment of the present application;

[0022] Figure 3 is a flow chart of fan non-rotation process according to the embodiment of the present application;

[0023] Figure 4 is a flow chart of fan rotation process according to the embodiment of the present application.

[0024] In the drawings:

[0025] 1, power module; 2, drive module; 3, relay module; 4, protection module. DETAILED DESCRIPTION

[0026] According to the embodiment of the present application, a circuit for optimizing fan rotating speed dust prevention is provided.

[0027] The present application will be further described in combination with the drawings and specific embodiments, as shown, the circuit for optimizing fan rotating speed dust prevention according to the embodiment of the present application comprises: Figures 1-2

[0028] a battery module 1 for providing working power supply,

[0029] a drive module 2 for controlling the on-off of the relay coil;

[0030] a relay module 3 for controlling the switching of the relay contact to determine the operation of the fan;

[0031] a protection module 4 for preventing the generation of reverse high-voltage current by the relay coil;

[0032] The output end of the power module 1 is connected with the input end of the relay module 3, the output end of the drive module 2 is kept connected with one end of the coil of the relay module 3, and the other end of the coil of the relay module 3 is connected with one end of the protection module 4.

[0033] ​In one embodiment, the power module 1 includes a connector CON3, wherein the first pin of the connector CON3 is connected to the +12_FS signal, and the third pin of the connector CON3 is grounded.

[0034] In one embodiment, the driving module 2 includes: transistor Q1, resistor R2 and resistor R3, wherein one end of resistor R2 is connected to the control signal FS, the other end of resistor R2 is connected to one end of resistor R3 and the base of transistor Q1, the other end of resistor R3 is connected to the emitter of transistor Q1 and grounded, and the collector of transistor Q1 is connected to the relay module 3 and the protection module 4.

[0035] In one embodiment, the relay module 3 includes a relay RY1, wherein the 8th pin of the relay RY1 is connected to the +12_FS signal, the 9th pin of the relay RY1 is connected to the +12_1V signal, the 12th pin of the relay RY1 is connected to the collector of the transistor Q1 and one end of the protection module 6, and the 1st pin of the relay RY1 is connected to the other end of the protection module 4.

[0036] In one embodiment, the protection module 4 includes a diode D5, wherein the anode of the diode D5 is connected to the collector of the transistor Q1 and the 12th pin of the relay RY1, and the cathode of the diode D5 is connected to the 1st pin of the relay RY1.

[0037] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0038] In practical applications, this invention primarily controls the switching of relays to control the fan power supply, thereby optimizing fan operation. The motherboard ARM controls the power board relay RY1 to conduct; the relay's working principle is based on the phenomenon of electromagnetic induction. Figure 3 -like Figure 4 As shown, when the withstand voltage tester is powered on, the ARM processor outputs a low level, at which point relay RY1 is not activated, and the fan (which remains connected to the output pin of relay RY1) lacks power and does not run. When the tester starts testing, the ARM processor outputs a high level, at which point relay RY1 activates, and the fan runs. After the test is completed, the ARM processor times the test. If the withstand voltage tester does not start after 60 seconds, the ARM processor outputs a low level, stopping the fan. Controlling the fan to run only after the tester starts effectively prevents dust from being drawn in when the tester is not in use and is not being cooled. When the tester is not continuously testing, promptly shutting off the fan also helps prevent dust accumulation.

[0039] The control signal FS of the ARM controls the triode Q1 to realize the control of the 5V coil relay; when the ARM gives low level, the base voltage of the triode Q1 is equal to the collector voltage, the triode Q1 is not turned on, the relay RY1 is attracted on the +12_1V pin, and the fan is not powered and does not run; when the ARM gives high level (3.3V), the base voltage is higher than the collector voltage, and the voltage difference is 3.3V, the triode Q1 is turned on, the relay RY1 is connected to the ground through the 12th pin, the coil generates current, the triode Q1 is attracted to the +12_FS pin, and the 12V power supplied by the power board is connected to the fan through the triode Q1, and the fan runs.

[0040] The diode D5 prevents the reverse flow of 5V voltage.

[0041] In summary, by virtue of the above technical scheme of the utility model, through the precise control of the fan rotation time, the dustproof function of the withstand voltage instrument is effectively realized. When the withstand voltage instrument is started but not tested, the fan remains in the closed state, avoiding the absorption of a large amount of dust in the workshop for a long time, thereby reducing the accumulation of dust in the instrument, especially the pollution of the PCB and other precision components, and reducing the running failure and test error caused by static accumulation. At the same time, the fan runs only when the withstand voltage instrument starts, and is reasonably delayed to close after the test is completed, ensuring the heat dissipation effect while avoiding unnecessary operation, prolonging the service life of the fan, and significantly improving the reliability and test accuracy of the equipment.

[0042] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A circuit for optimizing dust prevention of fan rotation speed, characterized by, The utility model relates to a power module (1) for providing working power supply, a drive module (2) for controlling the on-off of relay coil, a relay module (3) for controlling the switching of relay contact to determine the operation of fan, a protection module (4) for preventing the generation of reverse high voltage current by relay coil. The output end of the power module (1) is connected with the input end of the relay module (3), the output end of the drive module (2) is connected with one end of the coil of the relay module (3), and the other end of the coil of the relay module (3) is connected with one end of the protection module (4). The power module (1) comprises a connector CON3, wherein the first pin of the connector CON3 is connected with +12_FS signal, and the third pin of the connector CON3 is grounded. The drive module (2) comprises a triode Q1, a resistor R2 and a resistor R3, wherein one end of the resistor R2 is connected with control signal FS, the other end of the resistor R2 is respectively connected with one end of the resistor R3 and the base of the triode Q1, the other end of the resistor R3 is connected with the emitter of the triode Q1 and grounded, and the collector of the triode Q1 is connected with the relay module (3) and the protection module (4).

2. The circuit for optimizing the fan rotation speed for dust prevention according to claim 1, wherein The relay module (3) comprises a relay RY1, wherein the eighth pin of the relay RY1 is connected with +12_FS signal, the ninth pin of the relay RY1 is connected with +12_1V signal, the twelfth pin of the relay RY1 is respectively connected with the collector of the triode Q1 and one end of the protection module (6), and the first pin of the relay RY1 is connected with the other end of the protection module (4).

3. The circuit for optimizing the fan rotation speed for dust prevention according to claim 2, wherein The protection module (4) comprises a diode D5, wherein the anode of the diode D5 is respectively connected with the collector of the triode Q1 and the twelfth pin of the relay RY1, and the cathode of the diode D5 is connected with the first pin of the relay RY1.

4. The circuit for optimizing the fan rotation speed for dust prevention according to claim 3, wherein ​ ​ 5. The circuit for optimizing the fan rotation speed for dust prevention according to claim 4, wherein ​ ​

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