Computer heat dissipation control circuit

Abstract

The utility model discloses a computer heat dissipation control circuit, which relates to the technical field of computer heat dissipation and comprises a computer power supply module used for supplying power; the power supply detection module is used for detecting the power supply state of the computer power module; the standby power supply control module is used for providing standby electric energy when the computer power supply module is powered off and the temperature exceeds a temperature limit; the driving control module is used for detecting the temperature and controlling the heat dissipation module to carry out heat dissipation work when the temperature exceeds a set temperature limit; the heat dissipation state detection module is used for judging whether the temperature exceeds a temperature limit after the computer is shut down and controlling the standby power supply control module to supply power when the temperature exceeds the temperature limit; and the state display module is used for heat dissipation display. According to the computer heat dissipation control circuit, heat dissipation work is conducted when the computer works and the temperature exceeds the temperature limit, heat dissipation work is conducted until the temperature is normal after the computer stops working and the temperature still exceeds the temperature limit, and a guarantee is provided for restarting in a short time.

Description

Technical Field

[0001] The utility model relates to the technical field of computer heat dissipation, in particular to a computer heat dissipation control circuit. Background Art

[0002] Currently, with the continuous upgrading of computer equipment, their capacity and execution speed are increasing, which also causes the temperature inside the computer to rise. However, the increase in temperature affects the electrical quality of most electronic components and shortens their service life. To solve this problem, computers in the prior art generally use a heat dissipation control circuit composed of a cooling fan, which can automatically control the heat dissipation according to the computer's temperature. However, after the computer is shut down, the heat dissipation control circuit will also stop working. Although the computer temperature will automatically decrease after shutdown, if the computer is restarted before the temperature has dropped to a normal level after stopping, it will affect the boot speed and reduce the user experience. Therefore, there is room for improvement. Utility Model Content

[0003] The embodiment of the present invention provides a computer heat dissipation control circuit to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A computer heat dissipation control circuit comprises: a computer power supply module, a power supply detection module, a backup power supply control module, a drive control module, a heat dissipation state detection module, a state display module and a heat dissipation module;

[0006] The computer power supply module is used to receive the power provided by the computer and perform filtering and voltage stabilization on the power supply to output DC power;

[0007] a power supply detection module connected to the computer power supply module, configured to receive direct current power and perform voltage division processing on the direct current power, and output a first control signal when receiving the direct current power;

[0008] a backup power control module, connected to the power supply detection module and the heat dissipation status detection module, configured to receive a first control signal and provide a second control signal, and provide backup power upon receiving a third control signal output by the heat dissipation status detection module;

[0009] a drive control module connected to the computer power module and the backup power control module, configured to receive DC power or backup power and detect the temperature of the computer, and output a fourth control signal when the detected temperature exceeds a set temperature limit;

[0010] a heat dissipation state detection module, connected to the drive control module, configured to rectify and filter the fourth control signal and output a third control signal when receiving the fourth control signal and the second control signal at the same time;

[0011] a status display module, connected to the heat dissipation status detection module, for receiving backup power and performing heat dissipation display upon receiving a third control signal;

[0012] The heat dissipation module is connected to the computer power supply module, the backup power supply control module and the drive control module, and is used to receive DC power or backup power and perform heat dissipation when receiving a fourth control signal.

[0013] As a further solution of the present invention: the computer power supply module includes a computer power supply interface, a first diode, a first capacitor and a third diode; the power supply detection module includes a first resistor and a second resistor;

[0014] Preferably, the first end of the computer power interface is connected to the anode of the first diode and is connected to the first end of the second resistor and the backup power control module through the first resistor, the cathode of the first diode is connected to the cathode of the third diode, the drive control module and the heat dissipation module and is connected to the anode of the third diode, the second end of the second resistor, the second end of the computer power interface and the ground through the first capacitor.

[0015] As a further solution of the present invention: the backup power supply control module includes a backup power supply, a third resistor, a first power tube, a fifth resistor, a first switch tube, a second diode, a second power tube, a fourth resistor, a second switch tube and a sixth resistor;

[0016] Preferably, the first end of the backup power supply is connected to the source of the second power tube, one end of the fourth resistor, the source of the first power tube and the gate of the first power tube and the emitter of the first switching tube through the third resistor. The emitter of the first switching tube, the emitter of the second switching tube and the anode of the second diode are all grounded. The base of the first switching tube is connected to the first end of the second resistor, the drain of the first power tube is connected to the cathode of the second diode and the heat dissipation status detection module, the gate of the second power tube is connected to the other end of the fourth resistor and the collector of the second switching tube, the base of the second switching tube is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the status display module, and the drain of the second power tube is connected to the cathode of the first diode.

[0017] As a further solution of the present invention: the drive control module includes a tenth resistor, a first potentiometer, a first thermistor, a second thermistor, a first driver, a seventh resistor and a second capacitor; the heat dissipation module includes a third switch tube and a heat dissipation fan;

[0018] Preferably, the fourth end and the eighth end of the first driver are connected to the cathode of the third diode and one end of the heat dissipation fan and are connected to one end of the first potentiometer through the tenth resistor, the other end and the slider end of the first potentiometer are connected to the sixth end of the first driver and are connected to one end of the second thermistor and the second end of the first driver through the first thermistor, the fifth end of the first driver is grounded through the second capacitor, the third end of the first driver is connected to the base of the third switching tube through the seventh resistor, the emitter of the third switching tube, the first end of the first driver and the other end of the second thermistor are all grounded, and the collector of the third switching tube is connected to the other end of the heat dissipation fan.

[0019] As a further solution of the present invention: the heat dissipation state detection module includes a fourth diode, a third capacitor and a first logic chip;

[0020] Preferably, the anode of the fourth diode is connected to the base of the third switching tube, the cathode of the fourth diode is connected to the B end of the first logic chip and is grounded through the third capacitor, the A end of the first logic chip is connected to the cathode of the second diode, and the F end of the first logic chip is connected to the second end of the sixth resistor and the status display module.

[0021] As a further solution of the present invention: the status display module includes a ninth resistor, a fourth switch tube, a first indicator light and an eighth resistor;

[0022] Preferably, the base of the fourth switching tube is connected to the F end of the first logic chip through the ninth resistor, the emitter of the fourth switching tube is grounded, the collector of the fourth switching tube is connected to the cathode of the first indicator light, and the anode of the first indicator light is connected to the drain of the second power tube through the eighth resistor.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the computer heat dissipation control circuit of the present invention is connected to the power supply module of the computer and controls the drive control module to perform temperature detection. After the detected temperature exceeds the set temperature limit, the drive control module will control the heat dissipation module to perform heat dissipation to reduce the temperature of the computer. After the computer stops working, if the temperature of the computer still exceeds the temperature limit when the computer stops working, the heat dissipation status detection module will automatically control the backup power supply module to provide backup power supply, so that the drive control module can continue to control the heat dissipation module to perform heat dissipation work until the temperature is lower than the temperature limit, and the heat dissipation work will be stopped, so that the computer can continue to dissipate heat after stopping working, providing a guarantee for restarting in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The present invention provides a block diagram of the principle of a computer heat dissipation control circuit.

[0026] Figure 2 The present invention provides a circuit diagram of a computer heat dissipation control circuit.

[0027] Figure 3 This is a connection circuit diagram of the status display module provided by an example of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In one embodiment, see Figure 1 , a computer heat dissipation control circuit, comprising: a computer power supply module 1, a power supply detection module 2, a backup power supply control module 3, a drive control module 4, a heat dissipation state detection module 5, a state display module 6 and a heat dissipation module 7;

[0030] Specifically, the computer power supply module 1 is used to receive the power supply energy provided by the computer and perform filtering and voltage stabilization processing on the power supply energy to output DC power;

[0031] a power supply detection module 2 connected to the computer power supply module 1, configured to receive direct current power and perform voltage division processing on the direct current power, and output a first control signal when receiving the direct current power;

[0032] a backup power supply control module 3, connected to the power supply detection module 2 and the heat dissipation state detection module 5, configured to receive a first control signal and provide a second control signal, and provide backup power upon receiving a third control signal output by the heat dissipation state detection module 5;

[0033] a drive control module 4 connected to the computer power module 1 and the backup power control module 3, configured to receive DC power or backup power and detect the temperature of the computer, and output a fourth control signal when the detected temperature exceeds a set temperature limit;

[0034] a heat dissipation state detection module 5 connected to the drive control module 4, configured to rectify and filter the fourth control signal and output a third control signal when receiving the fourth control signal and the second control signal at the same time;

[0035] a status display module 6 connected to the heat dissipation status detection module 5 and configured to receive backup power and perform heat dissipation display upon receiving a third control signal;

[0036] The heat dissipation module 7 is connected to the computer power module 1, the backup power control module 3 and the drive control module 4, and is used to receive DC power or backup power and perform heat dissipation when receiving the fourth control signal.

[0037] In a specific embodiment, the computer power supply module 1 can adopt a computer power supply circuit composed of a computer power supply interface, a capacitor, and a diode, which can be connected to the power supply end of the computer, receive the power supply energy provided after the computer processing, and filter and stabilize the power supply energy; the power supply detection module 2 can adopt a power supply detection circuit composed of resistors, perform voltage division processing on the power energy connected to the computer power supply module 1, and provide a high-level state signal when the computer power supply module 1 supplies power, and provide a low-level state signal when the computer power supply module 1 stops supplying power, that is, a first control signal; the backup power supply control module 3 can adopt a backup power supply control circuit composed of a backup power supply, a power tube, a triode, etc., which can provide a high-level state signal when the computer power supply module 1 stops supplying power, That is, the second control signal, and provides backup power; the above-mentioned drive control module 4 can adopt a drive control circuit composed of a 555 integrated chip, a thermistor, a resistor, etc., which can detect the temperature of the computer and provide a high-level state signal, i.e., the fourth control signal, after the temperature of the computer exceeds the set temperature limit; the above-mentioned heat dissipation state detection module 5 can adopt a heat dissipation state detection circuit composed of a diode, a capacitor and a logic chip, which can determine whether the temperature of the computer still exceeds the temperature limit after the computer is shut down, and when it exceeds, output a high-level state signal, i.e., the third control signal; the above-mentioned status display module 6 can adopt a status display circuit composed of a transistor, a resistor and an indicator light to perform shutdown heat dissipation display; the above-mentioned heat dissipation module 7 can adopt a heat dissipation circuit composed of a transistor and a heat dissipation fan to perform heat dissipation control.

[0038] In another embodiment, see Figure 1 、 Figure 2 and Figure 3The computer power supply module 1 includes a computer power supply interface, a first diode D1, a first capacitor C1 and a third diode D3; the power supply detection module 2 includes a first resistor R1 and a second resistor R2;

[0039] Specifically, the first end of the computer power interface is connected to the anode of the first diode D1 and is connected to the first end of the second resistor R2 and the backup power control module 3 through the first resistor R1. The cathode of the first diode D1 is connected to the cathode of the third diode D3, the drive control module 4 and the heat dissipation module 7 and is connected to the anode of the third diode D3, the second end of the second resistor R2, the second end of the computer power interface and the ground through the first capacitor C1.

[0040] In a specific embodiment, the computer power interface is connected to the power supply terminal of the computer to receive the power output by the computer after voltage reduction, rectification and filtering.

[0041] Furthermore, the backup power control module 3 includes a backup power supply, a third resistor R3, a first power tube Q1, a fifth resistor R5, a first switch tube V1, a second diode D2, a second power tube Q2, a fourth resistor R4, a second switch tube V2 and a sixth resistor R6;

[0042] Specifically, a first end of the backup power supply is connected to the source of the second power tube Q2, one end of the fourth resistor R4, and the source of the first power tube Q1, and is connected to the gate of the first power tube Q1 and the emitter of the first switching tube V1 through the third resistor R3. The emitter of the first switching tube V1, the emitter of the second switching tube V2, and the anode of the second diode D2 are all grounded. The base of the first switching tube V1 is connected to the first end of the second resistor R2, the drain of the first power tube Q1 is connected to the cathode of the second diode D2 and the heat dissipation status detection module 5, the gate of the second power tube Q2 is connected to the other end of the fourth resistor R4 and the collector of the second switching tube V2, the base of the second switching tube V2 is connected to the first end of the sixth resistor R6, the second end of the sixth resistor R6 is connected to the status display module 6, and the drain of the second power tube Q2 is connected to the cathode of the first diode D1.

[0043] In a specific embodiment, the above-mentioned backup power supply can be a lithium battery; the above-mentioned first power tube Q1 and the second power tube Q2 can both be P-channel field-effect tubes, wherein the first power tube Q1 cooperates with the fifth resistor R5 and the second diode D2 to provide a second control signal; the second power tube Q2 performs power transmission control; the above-mentioned first switch tube V1 can be a PNP type transistor, and the second switch tube V2 can be an NPN type transistor.

[0044] Furthermore, the drive control module 4 includes a tenth resistor R10, a first potentiometer RP1, a first thermistor RT1, a second thermistor RT2, a first driver IC1, a seventh resistor R7 and a second capacitor C2; the heat dissipation module 7 includes a third switch tube V3 and a heat dissipation fan;

[0045] Specifically, the fourth end and the eighth end of the first driver IC1 are connected to the cathode of the third diode D3 and one end of the heat dissipation fan and are connected to one end of the first potentiometer RP1 through the tenth resistor R10. The other end and the slider end of the first potentiometer RP1 are connected to the sixth end of the first driver IC1 and are connected to one end of the second thermistor RT2 and the second end of the first driver IC1 through the first thermistor RT1. The fifth end of the first driver IC1 is grounded through the second capacitor C2. The third end of the first driver IC1 is connected to the base of the third switch tube V3 through the seventh resistor R7. The emitter of the third switch tube V3, the first end of the first driver IC1 and the other end of the second thermistor RT2 are all grounded. The collector of the third switch tube V3 is connected to the other end of the heat dissipation fan.

[0046] In a specific embodiment, the first thermistor RT1 and the second thermistor RT2 can both be negative temperature coefficient thermistors; the first driver IC1 can be an NE555 integrated chip. When the resistance values of the first thermistor RT1 and the second thermistor RT2 decrease, when the potential of the second terminal of the first driver IC1 is lower than one-third of the electric energy output by the third diode D3 after voltage regulation, the third terminal of the first driver IC1 will output a high level; the third switch tube V3 can be an NPN transistor.

[0047] Furthermore, the heat dissipation state detection module 5 includes a fourth diode D4, a third capacitor C3 and a first logic chip J1;

[0048] Specifically, the anode of the fourth diode D4 is connected to the base of the third switch tube V3, the cathode of the fourth diode D4 is connected to the B end of the first logic chip J1 and is grounded through the third capacitor C3, the A end of the first logic chip J1 is connected to the cathode of the second diode D2, and the F end of the first logic chip J1 is connected to the second end of the sixth resistor R6 and the status display module 6.

[0049] In a specific embodiment, the first logic chip J1 may be used as an AND gate chip.

[0050] Furthermore, the status display module 6 includes a ninth resistor R9, a fourth switch tube V4, a first indicator LED1 and an eighth resistor R8;

[0051] Specifically, the base of the fourth switch tube V4 is connected to the F terminal of the first logic chip J1 through the ninth resistor R9, the emitter of the fourth switch tube V4 is grounded, the collector of the fourth switch tube V4 is connected to the cathode of the first indicator light LED1, and the anode of the first indicator light LED1 is connected to the drain of the second power tube Q2 through the eighth resistor R8.

[0052] In a specific embodiment, the fourth switch tube V4 may be an NPN transistor; and the first indicator light LED1 may be an LED lamp.

[0053] In a computer heat dissipation control circuit according to this embodiment, the power provided by the computer is connected to the computer power interface, the first diode D1 performs isolation transmission, and the first capacitor C1 and the third capacitor C3 perform filtering and voltage stabilization. When the temperature of the computer rises, the resistance values of the first thermistor RT1 and the second thermistor RT2 will decrease, thereby lowering the potential of the second terminal of the first driver IC1. When the potential of the second terminal of the first driver IC1 is lower than one-third of the power output after voltage stabilization by the third diode D3, the third terminal of the first driver IC1 outputs a high level and controls the third switch tube V3 to conduct, and the heat dissipation fan performs heat dissipation. If the third terminal of the first driver IC1 outputs a high level signal, the computer is shut down, the computer power interface stops supplying power, and the first switch tube V1 is turned on, causing the first power tube Q1 to conduct and be on standby. The power supply triggers the A terminal of the first logic chip J1 to become high through the first power tube Q1, the fifth resistor R5, and the second diode D2. At this time, due to the energy stored in the third capacitor C3, the B terminal of the first logic chip J1 also becomes high. The F terminal of the first logic chip J1 will control the second switch tube V2 and the fourth switch tube V4 to turn on, and control the second power tube Q2 to turn on. The backup power supply provides backup power and supplies power to the first driver IC1, the cooling fan, etc. The first driver IC1 continues to control the cooling fan to dissipate heat. The first indicator LED1 displays the shutdown cooling function to prevent the user from mistakenly believing that the cooling fan is faulty. Until the potential of the second terminal of the first driver IC1 is higher than one-third of the power output by the third diode D3 after voltage regulation, the third terminal of the first driver IC1 outputs a low level, stopping the cooling operation and stopping the backup power supply.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0055] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A computer heat dissipation control circuit, characterized in that: The computer heat dissipation control circuit includes: a computer power supply module, a power supply detection module, a backup power supply control module, a drive control module, a heat dissipation state detection module, a state display module and a heat dissipation module; The computer power supply module is used to receive the power supply energy provided by the computer and perform filtering and voltage stabilization processing on the power supply energy to output DC power; The power supply detection module is connected to the computer power supply module, and is used to receive direct current power and perform voltage division processing on the direct current power, and output a first control signal when receiving the direct current power; The backup power control module is connected to the power supply detection module and the heat dissipation status detection module, and is used to receive a first control signal and provide a second control signal, and provide backup power when receiving a third control signal output by the heat dissipation status detection module; The drive control module is connected to the computer power module and the backup power control module, and is used to receive DC power or backup power and detect the temperature of the computer, and output a fourth control signal when the detected temperature exceeds a set temperature limit; The heat dissipation state detection module is connected to the drive control module, and is used to rectify and filter the fourth control signal and output a third control signal when receiving the fourth control signal and the second control signal at the same time; The status display module is connected to the heat dissipation status detection module and is used to receive backup power and perform heat dissipation display when receiving a third control signal; The heat dissipation module is connected to the computer power module, the backup power control module and the drive control module, and is used to receive DC power or backup power, and perform heat dissipation when receiving a fourth control signal.

2. A computer heat dissipation control circuit according to claim 1, characterized in that: The computer power supply module includes a computer power supply interface, a first diode, a first capacitor and a third diode; the power supply detection module includes a first resistor and a second resistor; The first end of the computer power interface is connected to the anode of the first diode and is connected to the first end of the second resistor and the backup power control module through the first resistor. The cathode of the first diode is connected to the cathode of the third diode, the drive control module and the heat dissipation module and is connected to the anode of the third diode, the second end of the second resistor, the second end of the computer power interface and the ground through the first capacitor.

3. A computer heat dissipation control circuit according to claim 2, characterized in that: The backup power control module includes a backup power supply, a third resistor, a first power tube, a fifth resistor, a first switch tube, a second diode, a second power tube, a fourth resistor, a second switch tube and a sixth resistor; The first end of the backup power supply is connected to the source of the second power tube, one end of the fourth resistor, and the source of the first power tube, and is connected to the gate of the first power tube and the emitter of the first switching tube through the third resistor. The emitter of the first switching tube, the emitter of the second switching tube, and the anode of the second diode are all grounded. The base of the first switching tube is connected to the first end of the second resistor, the drain of the first power tube is connected to the cathode of the second diode and the heat dissipation status detection module, the gate of the second power tube is connected to the other end of the fourth resistor and the collector of the second switching tube, the base of the second switching tube is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the status display module, and the drain of the second power tube is connected to the cathode of the first diode.

4. A computer heat dissipation control circuit according to claim 3, characterized in that: The drive control module includes a tenth resistor, a first potentiometer, a first thermistor, a second thermistor, a first driver, a seventh resistor and a second capacitor; the heat dissipation module includes a third switch tube and a heat dissipation fan; The fourth end and the eighth end of the first driver are both connected to the cathode of the third diode and one end of the heat dissipation fan and are connected to one end of the first potentiometer through the tenth resistor. The other end and the slider end of the first potentiometer are both connected to the sixth end of the first driver and are connected to one end of the second thermistor and the second end of the first driver through the first thermistor. The fifth end of the first driver is grounded through the second capacitor. The third end of the first driver is connected to the base of the third switching tube through the seventh resistor. The emitter of the third switching tube, the first end of the first driver and the other end of the second thermistor are all grounded. The collector of the third switching tube is connected to the other end of the heat dissipation fan.

5. A computer heat dissipation control circuit according to claim 4, characterized in that: The heat dissipation state detection module includes a fourth diode, a third capacitor and a first logic chip; The anode of the fourth diode is connected to the base of the third switch tube, the cathode of the fourth diode is connected to the B end of the first logic chip and is grounded through the third capacitor, the A end of the first logic chip is connected to the cathode of the second diode, and the F end of the first logic chip is connected to the second end of the sixth resistor and the status display module.

6. A computer heat dissipation control circuit according to claim 5, characterized in that: The status display module includes a ninth resistor, a fourth switch tube, a first indicator light and an eighth resistor; The base of the fourth switching tube is connected to the F terminal of the first logic chip through the ninth resistor, the emitter of the fourth switching tube is grounded, the collector of the fourth switching tube is connected to the cathode of the first indicator light, and the anode of the first indicator light is connected to the drain of the second power tube through the eighth resistor.

Images