Video card fan dust removal reminding circuit

Abstract

The utility model relates to a graphics card fan deashing reminding circuit which comprises an MCU chip, a power supply circuit for providing power for the MCU chip, a clock circuit and a fan rotation detection circuit, the power supply circuit is connected with the MCU chip, the clock circuit is connected with the MCU chip, the output end of the fan rotation detection circuit is connected with the MCU chip, and the output end of the fan rotation detection circuit is connected with the MCU chip. The input end of the fan rotation detection circuit is connected with the fan control interface, and the MCU chip is in communication connection with the GPU upper computer. When the recorded working time of the fan reaches a preset value, the desktop UI informs the consumer of cleaning dust of the fan and setting reminding in a striking character reminding mode, so that the consumer can clean and maintain the display card regularly, the display card can be in the best heat dissipation performance for a long time, and the service life of the display card is prolonged. Meanwhile, the service lives of the fan and parts can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of graphics card application, in particular to a graphics card fan dust cleaning reminder circuit. Background Art

[0002] At present, most consumers do not have the habit of cleaning the dust of graphics card fans regularly. Dust accumulated on the fan cooling holes will hinder air flow and reduce the fan's ability to inhale and exhaust air, which will cause the computer to overheat and affect performance and stability. In addition, dust on the fan may also destroy the dynamic balance of the fan blades, generate noise, and in severe cases, even jam the bearings and stop the fan from rotating. Therefore, regular cleaning and maintenance are very necessary. Without regular cleaning, the fan will be damaged faster, affecting the heat dissipation performance, and even worse, affecting the heat dissipation of parts, causing damage to parts. The existing graphics card industry performs dust cleaning when the computer is repaired, and does not remind consumers to perform regular cleaning. The system does not count the use of the fan, and users are not sure when to clean the dust. Summary of the invention

[0003] The utility model provides a graphics card fan dust cleaning reminder circuit, aiming to solve the problem that the existing graphics card has no function setting to remind the user to clean the fan, resulting in excessive dust accumulation on the fan and affecting heat dissipation.

[0004] The utility model provides a graphics card fan dust cleaning reminder circuit, comprising an MCU chip, a power supply circuit for providing power to the MCU chip, a clock circuit and a fan rotation detection circuit, wherein the power supply circuit is connected to the MCU chip, the clock circuit is connected to the MCU chip, the output end of the fan rotation detection circuit is connected to the MCU chip, the input end of the fan rotation detection circuit is connected to a fan control interface, and the MCU chip is communicatively connected to a GPU host computer.

[0005] As a further improvement of the present utility model, the power supply circuit includes a resistor R1 and a capacitor C1, one end of the resistor R1 is connected to one end of the capacitor C1, the other end of the resistor R1 is connected to pin 8 of the MCU chip, pin 3 of the MCU chip is connected to one end of the capacitor C1, and the other end of the capacitor C1 is grounded.

[0006] As a further improvement of the present utility model, the clock circuit includes a resistor R2, a capacitor C5, a capacitor C6 and a timer Y1, pin 15 of the MCU chip is connected to the input end of the timer Y1, pin 16 of the MCU chip is connected to the output end of the timer Y1, resistor R2 is connected in parallel to pins 15 and 16 of the MCU chip, one end of the capacitor C5 is connected to pin 16 of the MCU chip, one end of the capacitor C6 is connected to pin 15 of the MCU chip, and the other end of the capacitor C5 and the other end of the capacitor C6 are both grounded.

[0007] As a further improvement of the present utility model, the fan rotation detection circuit includes a resistor R5, an AND gate U2 and a capacitor C8, pin 7 of the MCU chip is connected to pin 4 of the AND gate U2, pin 1 and pin 2 of the AND gate U2 are connected to one end of the resistor R5, the other end of the resistor R5 is connected to the fan control interface, pin 5 of the AND gate U2 is connected to one end of the capacitor C8, the other end of the capacitor C8 is grounded, and pin 5 of the AND gate U2 is connected to a 3.3V voltage.

[0008] As a further improvement of the utility model, it also includes a power-off voltage trigger circuit, which includes a field effect tube Q1 and a resistor R4, one end of the resistor R4 is connected to the 8-pin of the MCU chip, the other end of the resistor R4 is connected to the other end of the resistor R1, the drain of the field effect tube Q1 is connected to the 8-pin of the MCU chip, the source of the field effect tube Q1 is grounded, and the gate of the field effect tube Q1 is connected to the video memory level signal.

[0009] As a further improvement of the utility model, it also includes a reset circuit, which includes a capacitor C7 and a resistor R3, one end of the resistor R3 is connected to one end of the capacitor C1, the other end of the resistor R3 is connected to pin 13 of the MCU chip, the other end of the resistor R3 is connected to one end of the capacitor C7, and the other end of the capacitor C7 is grounded.

[0010] As a further improvement of the utility model, it also includes a power supply filter circuit, which includes capacitors C2, C3 and C4. One end of capacitor C2 is connected to pin 3 of the MCU chip, one end of capacitor C4 is connected to pin 10 of the MCU chip, capacitor C3 is connected in parallel with capacitors C2 and C4, and the other ends of capacitor C2, C3 and C4 are all grounded.

[0011] As a further improvement of the present invention, pin 1 of the MCU chip is connected to the SCL port of the GPU host computer, and pin 2 of the MCU chip is connected to the SDA port of the GPU host computer.

[0012] The beneficial effect of the utility model is that it breaks through the drawback of not reminding consumers to regularly maintain the graphics card fan. When the recorded fan working time reaches the preset value, the desktop UI informs consumers to clean the fan in a striking text reminder. After setting the reminder, consumers can regularly clean and maintain the graphics card, so that the graphics card can maintain the best heat dissipation performance for a long time, and at the same time can extend the life of the fan and parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a specific circuit connection diagram of the utility model. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] like Figure 1 As shown, the utility model provides a graphics card fan dust cleaning reminder circuit, including an MCU chip, a power supply circuit for providing power to the MCU chip, a clock circuit and a fan rotation detection circuit, the power supply circuit is connected to the MCU chip, the clock circuit is connected to the MCU chip, the output end of the fan rotation detection circuit is connected to the MCU chip, the input end of the fan rotation detection circuit is connected to the fan control interface, and the MCU chip is communicatively connected to a GPU host computer.

[0016] As an embodiment of the utility model, the power supply circuit includes a resistor R1 and a capacitor C1, one end of the resistor R1 is connected to one end of the capacitor C1, the other end of the resistor R1 is connected to pin 8 of the MCU chip, pin 3 of the MCU chip is connected to one end of the capacitor C1, and the other end of the capacitor C1 is grounded.

[0017] As another embodiment of the utility model, the clock circuit includes a resistor R2, a capacitor C5, a capacitor C6 and a timer Y1, pin 15 of the MCU chip is connected to the input end of the timer Y1, pin 16 of the MCU chip is connected to the output end of the timer Y1, resistor R2 is connected in parallel to pins 15 and 16 of the MCU chip, one end of the capacitor C5 is connected to pin 16 of the MCU chip, one end of the capacitor C6 is connected to pin 15 of the MCU chip, and the other end of the capacitor C5 and the other end of the capacitor C6 are both grounded.

[0018] As another embodiment of the utility model, the fan rotation detection circuit includes a resistor R5, an AND gate U2 and a capacitor C8, pin 7 of the MCU chip is connected to pin 4 of the AND gate U2, pin 1 of the AND gate U2 is connected to pin 2 and to one end of the resistor R5, the other end of the resistor R5 is connected to the fan control interface, pin 5 of the AND gate U2 is connected to one end of the capacitor C8, the other end of the capacitor C8 is grounded, and pin 5 of the AND gate U2 is connected to a 3.3V voltage.

[0019] As another embodiment of the utility model, it also includes a power-off voltage trigger circuit, which includes a field effect tube Q1 and a resistor R4, one end of the resistor R4 is connected to the 8-pin of the MCU chip, the other end of the resistor R4 is connected to the other end of the resistor R1, the drain of the field effect tube Q1 is connected to the 8-pin of the MCU chip, the source of the field effect tube Q1 is grounded, and the gate of the field effect tube Q1 is connected to the video memory level signal.

[0020] As another embodiment of the utility model, it also includes a reset circuit, which includes a capacitor C7 and a resistor R3, one end of the resistor R3 is connected to one end of the capacitor C1, the other end of the resistor R3 is connected to pin 13 of the MCU chip, the other end of the resistor R3 is connected to one end of the capacitor C7, and the other end of the capacitor C7 is grounded.

[0021] As another embodiment of the utility model, it also includes a power supply filter circuit, which includes capacitors C2, C3 and C4. One end of capacitor C2 is connected to pin 3 of the MCU chip, one end of capacitor C4 is connected to pin 10 of the MCU chip, capacitor C3 is connected in parallel with capacitors C2 and C4, and the other ends of capacitor C2, C3 and C4 are all grounded.

[0022] As another embodiment of the present utility model, pin 1 of the MCU chip is connected to the SCL port of the GPU host computer, and pin 2 of the MCU chip is connected to the SDA port of the GPU host computer.

[0023] The utility model provides a graphics card fan dust cleaning reminder circuit, the circuit design logic is as follows:

[0024] When the graphics card is turned on and the level of the video memory level signal FBVDDQ is normal, the 8-pin PA4 port of the MCU chip changes from high level to low level. After receiving the signal, the MCU chip is ready to start counting and enable the clock circuit. Because the clock is 32.768KHZ, it can be accurate to seconds. When the fan rotates, the fan feedback signal is transmitted to the AND gate U2 through the resistor R5, and then to the MCU chip through the AND gate U2. If there is a continuous square wave transmission, the timer Y1 starts counting; since most fans have the function of stopping, if a continuous high level is detected, the timing will stop and accumulate with the previously recorded time.

[0025] When the graphics card loses power, that is, when the graphics card is shut down, the timing interrupt should be performed in time to avoid the MCU chip from failing to complete the timing. The video memory level signal FBVDDQ, which has the fastest power failure, is used as the trigger voltage. When the video memory level signal FBVDDQ drops below the start-up voltage of the field effect tube Q1, the level of the 8-pin PA4 port of the MCU chip changes from low to high. At this time, the interrupt function of the PA4 port is used to make the MCU chip quickly stop timing before power failure, and save the time from power on to shutdown.

[0026] The subsequent startup and shutdown will repeat this process and the timing will be performed continuously. The time information will be first stored in the ROM inside the MCU chip, and then transmitted to the GPU host computer through the I2C (SCL, SDA) interface. The GPU host computer will then pass the relevant information to the UI system through NVAPI. Usually, a period of time is set in the UI (the time is reasonably assessed by collecting the dust accumulation caused by the age of the graphics cards in various chassis) to remind consumers to clean the dust. When it is detected that the fan rotation time has reached the set time, the UI directly uses a pop-up window to inform consumers that dust cleaning is required and graphics card maintenance is required.

[0027] The power supply circuit is provided in the circuit to provide power to the MCU chip, the reset circuit is provided to realize timing reset, and the power supply filter circuit is provided to filter the input voltage. The model of the MCU chip can be HT32F52231.

[0028] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A graphics card fan dust cleaning reminder circuit, characterized in that: It includes an MCU chip, a power supply circuit for providing power to the MCU chip, a clock circuit and a fan rotation detection circuit. The power supply circuit is connected to the MCU chip, the clock circuit is connected to the MCU chip, the output end of the fan rotation detection circuit is connected to the MCU chip, the input end of the fan rotation detection circuit is connected to the fan control interface, and the MCU chip is connected to the GPU host computer for communication.

2. A graphics card fan dust cleaning reminder circuit according to claim 1, characterized in that: The power supply circuit includes a resistor R1 and a capacitor C1, one end of the resistor R1 is connected to one end of the capacitor C1, the other end of the resistor R1 is connected to pin 8 of the MCU chip, pin 3 of the MCU chip is connected to one end of the capacitor C1, and the other end of the capacitor C1 is grounded.

3. A graphics card fan dust cleaning reminder circuit according to claim 1, characterized in that: The clock circuit includes a resistor R2, a capacitor C5, a capacitor C6 and a timer Y1. Pin 15 of the MCU chip is connected to the input end of the timer Y1, pin 16 of the MCU chip is connected to the output end of the timer Y1, resistor R2 is connected in parallel to pins 15 and 16 of the MCU chip, one end of the capacitor C5 is connected to pin 16 of the MCU chip, one end of the capacitor C6 is connected to pin 15 of the MCU chip, and the other end of the capacitor C5 and the other end of the capacitor C6 are both grounded.

4. A graphics card fan dust cleaning reminder circuit according to claim 1, characterized in that: The fan rotation detection circuit includes a resistor R5, an AND gate U2 and a capacitor C8, pin 7 of the MCU chip is connected to pin 4 of the AND gate U2, pin 1 of the AND gate U2 is connected to pin 2 and to one end of the resistor R5, the other end of the resistor R5 is connected to the fan control interface, pin 5 of the AND gate U2 is connected to one end of the capacitor C8, the other end of the capacitor C8 is grounded, and pin 5 of the AND gate U2 is connected to a 3.3V voltage.

5. The graphics card fan dust cleaning reminder circuit according to claim 2, characterized in that: It also includes a power-off voltage trigger circuit, which includes a field effect tube Q1 and a resistor R4, one end of the resistor R4 is connected to the 8-pin of the MCU chip, the other end of the resistor R4 is connected to the other end of the resistor R1, the drain of the field effect tube Q1 is connected to the 8-pin of the MCU chip, the source of the field effect tube Q1 is grounded, and the gate of the field effect tube Q1 is connected to the video memory level signal.

6. A graphics card fan dust cleaning reminder circuit according to claim 2, characterized in that: It also includes a reset circuit, which includes a capacitor C7 and a resistor R3, one end of the resistor R3 is connected to one end of the capacitor C1, the other end of the resistor R3 is connected to pin 13 of the MCU chip, the other end of the resistor R3 is connected to one end of the capacitor C7, and the other end of the capacitor C7 is grounded.

7. A graphics card fan dust cleaning reminder circuit according to claim 1, characterized in that: It also includes a power supply filter circuit, which includes capacitors C2, C3 and C4. One end of capacitor C2 is connected to pin 3 of the MCU chip, one end of capacitor C4 is connected to pin 10 of the MCU chip, capacitor C3 is connected in parallel with capacitors C2 and C4, and the other ends of capacitor C2, C3 and C4 are all grounded.

8. The graphics card fan dust cleaning reminder circuit according to claim 1, characterized in that: Pin 1 of the MCU chip is connected to the SCL port of the GPU host computer, and pin 2 of the MCU chip is connected to the SDA port of the GPU host computer.

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