A high-performance seat ventilation multi-gear control circuit and its controller

Abstract

The present invention relates to the technical field of seat ventilation, and discloses a high-performance multi-gear control circuit for seat ventilation and its controller. The control circuit includes a first operational amplifier, a second operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a ninth resistor. The present invention can dynamically adjust the speed of the ventilation motor based on the temperature difference signal between the set temperature and the actual temperature of the seat surface, preventing the rotation speed of the ventilation motor from always being at the highest rotation speed, which may cause discomfort to the user's local muscles. It can compensate the temperature difference signal when the seat surface temperature is in a high-temperature state, preventing damage to the user caused by overheating of the seat surface. It can also give real-time warnings about the mode and state of the ventilation motor.

Description

Technical Field

[0001] The present invention relates to the technical field of seat ventilation, and particularly relates to a high-performance seat ventilation multi-gear control circuit and its controller. Background Art

[0002] When consumers purchase a car, comfort is undoubtedly an important consideration. The seat ventilation function can effectively reduce the temperature of the seat surface, bringing a dry and comfortable sitting and driving environment for the driver and passengers. At the same time, it also helps to prevent skin diseases and bacterial transmission. However, in order to quickly cool down, when the seat ventilation is turned on, the ventilation motor will run at the maximum speed. Although the ventilation effect is improved, when in high-efficiency ventilation for a long time, the back and both sides of the waist of the sitting or driving person will feel a continuous and relatively fast air flow, resulting in discomfort of local muscles. Therefore, a high-performance seat ventilation multi-gear control circuit and its controller are proposed, which can dynamically adjust the speed of the ventilation motor based on the temperature difference signal between the set temperature and the actual temperature of the seat surface, preventing the speed of the ventilation motor from always being at the highest speed, causing discomfort of local muscles of the user, and being able to compensate the temperature difference signal when the temperature of the seat surface is in a high-temperature state, preventing damage to the user caused by overheating of the seat surface. Summary of the Invention

[0003] In view of the above technical problems, the object of the present invention is to provide a high-performance seat ventilation multi-gear control circuit. The control circuit includes a first operational amplifier U1, a second operational amplifier U2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a ninth resistor R9.

[0004] The non-inverting input terminal of the first operational amplifier U1 is connected to the IN-1 terminal, the inverting input terminal of the first operational amplifier U1 is connected to one end of the ninth resistor R9, the output terminal of the first operational amplifier U1 is connected to one end of the third resistor R3 and the other end of the ninth resistor R9, the non-inverting input terminal of the second operational amplifier U2 is connected to the other end of the third resistor R3 and one end of the fourth resistor R4, the inverting input terminal of the second operational amplifier U2 is connected to one end of the fifth resistor R5 and one end of the sixth resistor R6, the output terminal of the second operational amplifier U2 is connected to the other end of the fifth resistor R5, one end of the first resistor R1 is connected to the power supply, the other end of the first resistor R1 is connected to one end of the second resistor R2 and the other end of the sixth resistor R6, and the other ends of the second resistor R2 and the fourth resistor R4 are connected to the ground terminal.

[0005] Furthermore, the control circuit further includes a fifth operational amplifier U5, a second field effect transistor Q2, a seventeenth resistor R17, an eighteenth resistor R18, a twentieth resistor R20, and a twenty-first resistor R21.

[0006] The non-inverting input terminal of the fifth operational amplifier U5 is connected to one end of the twentieth resistor R20 and one end of the twenty-first resistor R21. The inverting input terminal of the fifth operational amplifier U5 is connected to the IN-1 terminal. The output terminal of the fifth operational amplifier U5 is connected to the gate of the second field-effect transistor Q2. The drain of the second field-effect transistor Q2 is connected to one end of the seventeenth resistor R17 and one end of the eighteenth resistor R18. The other end of the seventeenth resistor R17, the other end of the twenty-first resistor R21 are connected to the power supply. The other end of the eighteenth resistor R18, the other end of the twentieth resistor R20, the source of the second field-effect transistor Q2 are connected to the ground terminal.

[0007] Further, the control circuit further includes a fourth operational amplifier U4, a second diode D2, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16;

[0008] The non-inverting input terminal of the fourth operational amplifier U4 is connected to one end of the fifteenth resistor R15 and one end of the sixteenth resistor R16. The inverting input terminal of the fourth operational amplifier U4 is connected to one end of the thirteenth resistor R13 and one end of the fourteenth resistor R14. The output terminal of the fourth operational amplifier U4 is connected to the anode of the second diode D2 and the other end of the thirteenth resistor R13. The cathode of the second diode D2, one end of the twelfth resistor R12 are connected to the OUT-1 terminal. The other end of the fifteenth resistor R15 is connected to the output terminal of the second operational amplifier U2. The other end of the sixteenth resistor R16 is connected to one end of the eighteenth resistor R18. The other end of the fourteenth resistor R14 is connected to the ground terminal.

[0009] Further, the control circuit further includes a third operational amplifier U3, a first field-effect transistor Q1, a first diode D1, a tenth resistor R10, an eleventh resistor R11;

[0010] The non-inverting input terminal of the third operational amplifier U3 is connected to the output terminal of the first operational amplifier U1. The inverting input terminal of the third operational amplifier U3 is connected to one end of the second resistor R2. The output terminal of the third operational amplifier U3 is connected to the gate of the first field-effect transistor Q1. The source of the first field-effect transistor Q1 is connected to one end of the tenth resistor R10 and one end of the eleventh resistor R11. The drain of the first field-effect transistor Q1 is connected to the anode of the first diode D1. The cathode of the first diode D1 is connected to the OUT-1 terminal. The other end of the tenth resistor R10 is connected to the power supply. The other end of the eleventh resistor R11 is connected to the ground terminal.

[0011] Further, the control circuit further includes a third triode Q3, a fourth diode D4, a sixth light-emitting diode D6, a twenty-second resistor R22, a twenty-third resistor R23;

[0012] The base of the third triode Q3 is connected to the cathode of the fourth diode D4 and one end of the twenty-second resistor R22. The collector of the third triode Q3 is connected to the anode of the sixth light-emitting diode D6. The emitter of the third triode Q3 is connected to one end of the twenty-third resistor R23. The anode of the fourth diode D4 is connected to the output terminal of the fifth operational amplifier U5. The other end of the twenty-third resistor R23 is connected to the power supply. The other end of the twenty-second resistor R22, the cathode of the sixth light-emitting diode D6, and the ground terminal are connected.

[0013] Further, the control circuit further includes a fifth light-emitting diode D5, a nineteenth resistor R19, and a twenty-fifth resistor R25;

[0014] One end of the twenty-fifth resistor R25 is connected to one end of the nineteenth resistor R19. The other end of the twenty-fifth resistor R25 is connected to the anode of the fifth light-emitting diode D5. The other end of the nineteenth resistor R19 is connected to the output terminal of the fifth operational amplifier U5. The cathode of the fifth light-emitting diode D5 is connected to the ground terminal.

[0015] Further, the control circuit further includes a fourth field-effect transistor Q4, a third light-emitting diode D3, and a twenty-fourth resistor R24;

[0016] The source of the fourth field-effect transistor Q4 is connected to one end of the nineteenth resistor R19. The drain of the fourth field-effect transistor Q4 is connected to the anode of the third light-emitting diode D3. The gate of the fourth field-effect transistor Q4 is connected to the gate of the first field-effect transistor Q1 and one end of the twenty-fourth resistor R24. The other end of the twenty-fourth resistor R24, the cathode of the third light-emitting diode D3, and the ground terminal are connected.

[0017] Further, the second resistor R2 is a variable resistor.

[0018] Further, the eighteenth resistor R18 is a variable resistor.

[0019] Further, a high-performance multi-gear controller for seat ventilation, the controller includes the above control circuit.

[0020] The beneficial effects of the present invention compared with the prior art are:

[0021] The present invention can dynamically adjust the speed of the ventilation motor based on the temperature difference signal between the set temperature and the actual temperature of the seat surface, prevent the rotation speed of the ventilation motor from always being at the highest speed, resulting in discomfort of the user's local muscles, can compensate the temperature difference signal when the seat surface temperature is in a high temperature state, prevent the seat surface from overheating and causing harm to the user, and can give real-time warnings about the ventilation motor mode and status. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the prior art and the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is the circuit structure diagram provided by the present invention. Specific embodiments

[0024] In order to make the purpose and advantages of the present invention more clear, the following will specifically describe the present invention in combination with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention, and does not strictly limit the scope of protection specifically claimed by the present invention.

[0025] The present invention discloses a high-performance seat ventilation multi-gear control circuit. The control circuit includes a first operational amplifier U1, a second operational amplifier U2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a ninth resistor R9.

[0026] The non-inverting terminal of the first operational amplifier U1 is connected to the IN-1 terminal. The inverting terminal of the first operational amplifier U1 is connected to one end of the ninth resistor R9. The output terminal of the first operational amplifier U1 is connected to one end of the third resistor R3 and the other end of the ninth resistor R9. The non-inverting terminal of the second operational amplifier U2 is connected to the other end of the third resistor R3 and one end of the fourth resistor R4. The inverting terminal of the second operational amplifier U2 is connected to one end of the fifth resistor R5 and one end of the sixth resistor R6. The output terminal of the second operational amplifier U2 is connected to the other end of the fifth resistor R5. One end of the first resistor R1 is connected to the power supply. The other end of the first resistor R1 is connected to one end of the second resistor R2 and the other end of the sixth resistor R6. The other end of the second resistor R2 and the other end of the fourth resistor R4 are connected to the ground terminal.

[0027] Specifically, the control circuit further includes a fifth operational amplifier U5, a second field effect transistor Q2, a seventeenth resistor R17, an eighteenth resistor R18, a twentieth resistor R20, and a twenty-first resistor R21.

[0028] The non-inverting input terminal of the fifth operational amplifier U5 is connected to one end of the twentieth resistor R20 and one end of the twenty-first resistor R21. The inverting input terminal of the fifth operational amplifier U5 is connected to the IN-1 terminal. The output terminal of the fifth operational amplifier U5 is connected to the gate of the second field-effect transistor Q2. The drain of the second field-effect transistor Q2 is connected to one end of the seventeenth resistor R17 and one end of the eighteenth resistor R18. The other end of the seventeenth resistor R17, the other end of the twenty-first resistor R21 are connected to the power supply. The other end of the eighteenth resistor R18, the other end of the twentieth resistor R20, the source of the second field-effect transistor Q2 are connected to the ground terminal.

[0029] Specifically, the control circuit further includes a fourth operational amplifier U4, a second diode D2, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16;

[0030] The non-inverting input terminal of the fourth operational amplifier U4 is connected to one end of the fifteenth resistor R15 and one end of the sixteenth resistor R16. The inverting input terminal of the fourth operational amplifier U4 is connected to one end of the thirteenth resistor R13 and one end of the fourteenth resistor R14. The output terminal of the fourth operational amplifier U4 is connected to the anode of the second diode D2 and the other end of the thirteenth resistor R13. The cathode of the second diode D2, one end of the twelfth resistor R12 are connected to the OUT-1 terminal. The other end of the fifteenth resistor R15 is connected to the output terminal of the second operational amplifier U2. The other end of the sixteenth resistor R16 is connected to one end of the eighteenth resistor R18. The other end of the fourteenth resistor R14 is connected to the ground terminal.

[0031] Specifically, the control circuit further includes a third operational amplifier U3, a first field-effect transistor Q1, a first diode D1, a tenth resistor R10, an eleventh resistor R11;

[0032] The non-inverting input terminal of the third operational amplifier U3 is connected to the output terminal of the first operational amplifier U1. The inverting input terminal of the third operational amplifier U3 is connected to one end of the second resistor R2. The output terminal of the third operational amplifier U3 is connected to the gate of the first field-effect transistor Q1. The source of the first field-effect transistor Q1 is connected to one end of the tenth resistor R10 and one end of the eleventh resistor R11. The drain of the first field-effect transistor Q1 is connected to the anode of the first diode D1. The cathode of the first diode D1 is connected to the OUT-1 terminal. The other end of the tenth resistor R10 is connected to the power supply. The other end of the eleventh resistor R11 is connected to the ground terminal.

[0033] Specifically, the control circuit further includes a third triode Q3, a fourth diode D4, a sixth light-emitting diode D6, a twenty-second resistor R22, a twenty-third resistor R23;

[0034] The base of the third triode Q3 is connected to the cathode of the fourth diode D4 and one end of the twenty-second resistor R22. The collector of the third triode Q3 is connected to the anode of the sixth light-emitting diode D6. The emitter of the third triode Q3 is connected to one end of the twenty-third resistor R23. The anode of the fourth diode D4 is connected to the output terminal of the fifth operational amplifier U5. The other end of the twenty-third resistor R23 is connected to the power supply. The other end of the twenty-second resistor R22, the cathode of the sixth light-emitting diode D6 and the ground terminal are connected.

[0035] Specifically, the control circuit further includes a fifth light-emitting diode D5, a nineteenth resistor R19, and a twenty-fifth resistor R25;

[0036] One end of the twenty-fifth resistor R25 is connected to one end of the nineteenth resistor R19. The other end of the twenty-fifth resistor R25 is connected to the anode of the fifth light-emitting diode D5. The other end of the nineteenth resistor R19 is connected to the output terminal of the fifth operational amplifier U5. The cathode of the fifth light-emitting diode D5 is connected to the ground terminal.

[0037] Specifically, the control circuit further includes a fourth field-effect transistor Q4, a third light-emitting diode D3, and a twenty-fourth resistor R24;

[0038] The source of the fourth field-effect transistor Q4 is connected to one end of the nineteenth resistor R19. The drain of the fourth field-effect transistor Q4 is connected to the anode of the third light-emitting diode D3. The gate of the fourth field-effect transistor Q4 is connected to the gate of the first field-effect transistor Q1 and one end of the twenty-fourth resistor R24. The other end of the twenty-fourth resistor R24, the cathode of the third light-emitting diode D3 and the ground terminal are connected.

[0039] Specifically, the second resistor R2 is a variable resistor.

[0040] Specifically, the eighteenth resistor R18 is a variable resistor.

[0041] Specifically, a high-performance multi-speed controller for seat ventilation, the controller includes the above control circuit.

[0042] The specific working principle of the present invention is as follows: IN-1 is used to receive the real-time temperature signal of the seat surface. This signal is fed back to the non-inverting terminal of the first operational amplifier U1. The output terminal of the first operational amplifier U1 is connected to the inverting terminal of the first operational amplifier U1 through the ninth resistor R9 for negative feedback, enabling the first operational amplifier U1 to follow and output the real-time temperature signal of the seat surface while preventing interference from the downstream circuit. The power supply signal passes through the first resistor R1 and the second resistor R2 to the ground terminal. The signal at the second resistor R2 terminal is the required temperature signal of the user for the seat. By changing the resistance value of the second resistor R2, the amplitude of this signal can be adjusted. The signal at the output terminal of the first operational amplifier U1 passes through the third resistor R3 and the fourth resistor R4 to the ground terminal. The signal at the fourth resistor R4 terminal is fed back to the non-inverting terminal of the second operational amplifier U2. The output terminal of the second operational amplifier U2 is connected to the inverting terminal of the second operational amplifier U2 through the fifth resistor R5 for negative feedback. The signal at the second resistor R2 terminal is fed back to the inverting terminal of the second operational amplifier U2 through the sixth resistor R6. The amplitude of the signal at the output terminal of the second operational amplifier U2 is the temperature difference signal between the seat surface temperature signal and the seat required temperature signal. The power supply signal passes through the seventeenth resistor R17 and the eighteenth resistor R18 to the ground terminal. The signal at the eighteenth resistor R18 terminal is the basic signal for compensating the rotation speed of the ventilation motor when the seat surface temperature is high. By changing the resistance value of the eighteenth resistor R18, the amplitude of this signal can be adjusted. The power supply signal passes through the twenty-first resistor R21 and the twentieth resistor R20 to the ground terminal. The amplitude of the signal at the twentieth resistor R20 terminal is the high-temperature reference signal of the seat surface. By changing the resistance value of the twentieth resistor R20, the amplitude of this signal can be adjusted. The signal at the twentieth resistor R20 terminal is fed back to the non-inverting terminal of the fifth operational amplifier U5. At the same time, the real-time temperature signal of the seat surface is synchronously fed back to the inverting terminal of the fifth operational amplifier U5. When the seat surface temperature is higher than the high-temperature reference signal, the fifth operational amplifier U5 is cut off. The signal at the output terminal of the fifth operational amplifier U5 is fed back to the gate of the second field-effect transistor Q2. When the seat surface temperature is lower than the high-temperature reference signal, the voltage difference between the gate and the source of the second field-effect transistor Q2 is higher than the conduction threshold, and the second field-effect transistor Q2 is turned on. The signal at the eighteenth resistor R18 terminal passes through the drain and the source of the second field-effect transistor Q2 to the ground terminal, and the eighteenth resistor R18 terminal is set to zero potential.

[0043] The signal at the terminal of the eighteenth resistor R18 is fed back to the non-inverting input terminal of the fourth operational amplifier U4 through the sixteenth resistor R16. The signal at the output terminal of the fourth operational amplifier U4 is connected to the ground terminal through the thirteenth resistor R13 and the fourteenth resistor R14. The signal at the terminal of the fourteenth resistor R14 is fed back to the inverting input terminal of the fourth operational amplifier U4. At the same time, the signal at the output terminal of the second operational amplifier U2 is fed back to the non-inverting input terminal of the fourth operational amplifier U4 through the fifteenth resistor R15, enabling the fourth operational amplifier U4 to output a compensation signal based on the temperature difference signal and the reference signal. The signal at the output terminal of the fourth operational amplifier U4 is connected to the ground terminal through the second diode D2 and the twelfth resistor R12. The signal at the terminal of the twelfth resistor R12 is fed back to the ventilation motor through OUT-1. The higher the amplitude of the signal at the terminal of the twelfth resistor R12, the higher the motor speed. Thus, when the temperature of the seat surface is lower than the high-temperature reference signal, a temperature difference signal is fed back to the ventilation motor, enabling the ventilation motor to dynamically adjust the rotation speed based on the temperature difference. When the temperature of the seat surface is higher than the high-temperature reference signal, the temperature difference signal is compensated, causing the ventilation motor to increase its rotation speed to prevent the seat surface from overheating and harming the user. The power supply signal is connected to the ground terminal through the tenth resistor R10 and the eleventh resistor R11. The signal at the terminal of the eleventh resistor R11 is the constant rotation speed signal for the ventilation motor to keep the seat surface at a constant temperature. Changing the resistance value of the eleventh resistor R11 can adjust the amplitude of this signal. The signal at the terminal of the second resistor R2 is fed back to the inverting input terminal of the third operational amplifier U3. The signal at the output terminal of the first operational amplifier U1 is fed back to the non-inverting input terminal of the third operational amplifier U3. When the temperature of the seat surface is at the temperature required by the user for the seat, the third operational amplifier U3 is turned off. The signal at the output terminal of the third operational amplifier U3 is fed back to the gate of the first field-effect transistor Q1. The voltage difference between the gate and the source of the first field-effect transistor Q1 is lower than the conduction threshold, and the first field-effect transistor Q1 conducts. The signal at the terminal of the eleventh resistor R11 passes through the first diode D1 and is then fed back to the ventilation motor through OUT-1. When the ventilation motor receives this signal, its rotation speed is the constant rotation speed required to maintain a constant temperature. Thus, when the temperature of the seat surface is at the required temperature, the rotation speed of the ventilation motor can be at the constant rotation speed required to maintain a constant temperature.

[0044] When the seat surface temperature is lower than the high-temperature reference signal and higher than the demand temperature signal, the signal at the output terminal of the fifth operational amplifier U5 passes through the nineteenth resistor R19, the twenty-fifth resistor R25, and the fifth light-emitting diode D5 to the ground terminal. The fifth light-emitting diode D5 conducts, and the conduction of the fifth light-emitting diode D5 represents the status signal of the temperature difference control in the dynamic adjustment mode of the ventilation motor. At the same time, the signal at the output terminal of the fifth operational amplifier U5 passes through the fourth diode D4 and the twenty-second resistor R22 to the ground terminal. When the seat surface temperature is higher than the high-temperature reference signal, the fifth operational amplifier U5 is cut off, and the power supply signal passes through the twenty-third resistor R23, the emitter of the third triode Q3, the base of the third triode Q3, and the twenty-second resistor R22 to the ground terminal. A forward bias is formed between the emitter and the base of the third triode Q3, and the third triode Q3 conducts. The power supply signal passes through the twenty-third resistor R23, the emitter of the third triode Q3, the collector of the third triode Q3, and the sixth light-emitting diode D6 to the ground terminal. The sixth light-emitting diode D6 conducts, and the conduction of the sixth light-emitting diode D6 represents the status signal of the compensation control in the dynamic adjustment mode of the ventilation motor. The signal at the output terminal of the third operational amplifier U3 is synchronously fed back to the gate of the fourth field-effect transistor Q4. The twenty-fourth resistor R24 is used to discharge the parasitic capacitances of the gates of the first field-effect transistor Q1 and the fourth field-effect transistor Q4. When the seat surface temperature is at the temperature demanded by the user for the seat, the third operational amplifier U3 is cut off, the voltage difference between the gate and the source of the fourth field-effect transistor Q4 is lower than the conduction threshold, the fourth field-effect transistor Q4 conducts, and the signal at the output terminal of the fifth operational amplifier U5 passes through the nineteenth resistor R19, the source of the fourth field-effect transistor Q4, the drain of the fourth field-effect transistor Q4, and the third light-emitting diode D3 to the ground terminal. The twenty-fifth resistor R25 limits the current to make the fifth light-emitting diode D5 cut off, and the third light-emitting diode D3 conducts. The conduction of the third light-emitting diode D3 represents the status signal of the constant rotation speed in the non-dynamic adjustment mode of the ventilation motor.

[0045] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present invention. Any reference signs in the claims should not be construed as limiting the claimed rights.

Claims

1. A high-performance multi-speed control circuit for seat ventilation, characterized in that, The control circuit includes a first operational amplifier, a second operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a ninth resistor; The non-inverting input terminal of the first operational amplifier is connected to the IN-1 terminal, the inverting input terminal of the first operational amplifier is connected to one end of the ninth resistor, the output terminal of the first operational amplifier is connected to one end of the third resistor and the other end of the ninth resistor, the non-inverting input terminal of the second operational amplifier is connected to the other end of the third resistor and one end of the fourth resistor, the inverting input terminal of the second operational amplifier is connected to one end of the fifth resistor and one end of the sixth resistor, the output terminal of the second operational amplifier is connected to the other end of the fifth resistor, one end of the first resistor is connected to the power supply, the other end of the first resistor is connected to one end of the second resistor and the other end of the sixth resistor, and the other end of the second resistor, the other end of the fourth resistor are connected to the ground terminal; The control circuit further includes a fifth operational amplifier, a second field effect transistor, a seventeenth resistor, an eighteenth resistor, a twentieth resistor, and a twenty-first resistor; The non-inverting input terminal of the fifth operational amplifier is connected to one end of the twentieth resistor and one end of the twenty-first resistor, the inverting input terminal of the fifth operational amplifier is connected to the IN-1 terminal, the output terminal of the fifth operational amplifier is connected to the gate of the second field effect transistor, the drain of the second field effect transistor is connected to one end of the seventeenth resistor and one end of the eighteenth resistor, the other end of the seventeenth resistor, the other end of the twenty-first resistor are connected to the power supply, and the other end of the eighteenth resistor, the other end of the twentieth resistor, the source of the second field effect transistor are connected to the ground terminal; The control circuit further includes a fourth operational amplifier, a second diode, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor; The non-inverting input terminal of the fourth operational amplifier is connected to one end of the fifteenth resistor and one end of the sixteenth resistor, the inverting input terminal of the fourth operational amplifier is connected to one end of the thirteenth resistor and one end of the fourteenth resistor, the output terminal of the fourth operational amplifier is connected to the anode of the second diode and the other end of the thirteenth resistor, the cathode of the second diode, one end of the twelfth resistor are connected to the OUT-1 terminal, the other end of the fifteenth resistor is connected to the output terminal of the second operational amplifier, the other end of the sixteenth resistor is connected to one end of the eighteenth resistor, and the other end of the fourteenth resistor is connected to the ground terminal; The control circuit further includes a third operational amplifier, a first field effect transistor, a first diode, a tenth resistor, and an eleventh resistor; The non-inverting input terminal of the third operational amplifier is connected to the output terminal of the first operational amplifier, the inverting input terminal of the third operational amplifier is connected to one end of the second resistor, the output terminal of the third operational amplifier is connected to the gate of the first field effect transistor, the source of the first field effect transistor is connected to one end of the tenth resistor and one end of the eleventh resistor, the drain of the first field effect transistor is connected to the anode of the first diode, the cathode of the first diode is connected to the OUT-1 terminal, the other end of the tenth resistor is connected to the power supply, and the other end of the eleventh resistor is connected to the ground terminal.

2. The high-performance seat ventilation multi-gear control circuit according to claim 1, wherein, The control circuit further includes a third triode, a fourth diode, a sixth light emitting diode, a twenty-second resistor, and a twenty-third resistor; The base of the third triode is connected to the cathode of the fourth diode and one end of the twenty-second resistor. The collector of the third triode is connected to the anode of the sixth light-emitting diode. The emitter of the third triode is connected to one end of the twenty-third resistor. The anode of the fourth diode is connected to the output terminal of the fifth operational amplifier. The other end of the twenty-third resistor is connected to the power supply. The other end of the twenty-second resistor, the cathode of the sixth light-emitting diode and the ground terminal are connected.

3. The high-performance seat ventilation multi-gear control circuit according to claim 1, characterized in that, The control circuit further includes a fifth light-emitting diode, a nineteenth resistor, and a twenty-fifth resistor; One end of the twenty-fifth resistor is connected to one end of the nineteenth resistor. The other end of the twenty-fifth resistor is connected to the anode of the fifth light-emitting diode. The other end of the nineteenth resistor is connected to the output terminal of the fifth operational amplifier. The cathode of the fifth light-emitting diode is connected to the ground terminal.

4. The high-performance seat ventilation multi-gear control circuit according to claim 3, characterized in that, The control circuit further includes a fourth field-effect transistor, a third light-emitting diode, and a twenty-fourth resistor; The source of the fourth field-effect transistor is connected to one end of the nineteenth resistor. The drain of the fourth field-effect transistor is connected to the anode of the third light-emitting diode. The gate of the fourth field-effect transistor is connected to the gate of the first field-effect transistor and one end of the twenty-fourth resistor. The other end of the twenty-fourth resistor, the cathode of the third light-emitting diode and the ground terminal are connected.

5. The high-performance seat ventilation multi-gear control circuit according to claim 1, characterized in that The second resistor is a variable resistor.

6. The high-performance seat ventilation multi-gear control circuit according to claim 1, characterized in that, The eighteenth resistor is a variable resistor.

7. A high-performance multi-speed controller for seat ventilation, characterized in that, The controller has the control circuit as described in any one of claims 1-6.

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