Cabin environment system control device

Abstract

The utility model discloses a cabin environment system control device. The cabin environment system control device comprises an input unit, an output unit and a single-chip microcomputer circuit. The cabin environment system control device automatically achieves coordinated work of an air conditioner evaporator, an air conditioner compressor, an air conditioner condenser, a fresh air valve and a heating valve through software logic judgment by collecting and recognizing a heating switch gear, a refrigeration switch gear, an ignition switch position and engine CAN data. Driving of cabin environment system equipment is achieved through hardware, and logic control over an air conditioner evaporator, an air conditioner compressor, an air conditioner condenser, the speed of the air conditioner compressor, a fresh air valve and a heating valve is automatically achieved through software. On the premise that the system requirement is met, the workload of a pilot is greatly reduced, meanwhile, the safety of the system can be improved, and the intelligent level of an aircraft is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft electromechanical systems, and in particular relates to a cockpit environment system control device. Background Art

[0002] A newly developed aircraft uses a Rotax engine. Different from the traditional mechanically driven air-conditioning system, this engine is equipped with an electronic cabin environment control system. This newly developed aircraft provides cabin heating, windshield defogger, cabin ventilation and cooling functions for the cabin environment system. However, the current electronic cabin environment control system lacks automatic control of the air-conditioning evaporator, air-conditioning compressor, air-conditioning condenser, air-conditioning compressor speed, fresh air valve and heating valve, which increases the pilot's load. On the other hand, the output power of the engine and generator of this newly developed aircraft cannot meet the full-power operation of the cabin environment system throughout the entire process, resulting in a lack of flight safety. Summary of the invention

[0003] In order to realize the automatic control of the air conditioning evaporator, air conditioning compressor, air conditioning condenser, air conditioning compressor speed, fresh air valve, and heating valve by the newly developed aircraft electronic control system, and automatically limit the performance of the cabin environment system according to the aircraft state, the utility model provides a cabin environment system control device, which is characterized by comprising:

[0004] Input unit: fresh air / air conditioning switch circuit, heating switch circuit, air conditioning condenser drive voltage monitoring circuit,

[0005] Output unit: air conditioner condenser drive circuit, air conditioner evaporator drive circuit, air conditioner compressor switch circuit, fresh air valve control circuit, heating motor drive circuit, air conditioner compressor speed control circuit,

[0006] Single chip microcomputer circuit;

[0007] Among them, the output end of the power supply circuit is connected to the first port of the single-chip computer, the output end of the fresh air / air conditioning switch circuit is connected to the eleventh port of the single-chip computer, the output end of the heating switch circuit is connected to the twenty-second port of the single-chip computer, the input end of the air conditioning condenser drive voltage monitoring circuit is connected to the tenth port of the single-chip computer, and the input end of the CAN bus circuit is connected to the twenty-fourth port and the twenty-fifth port of the single-chip computer;

[0008] The input end of the air conditioning condenser and evaporator drive circuit is connected to the 23rd interface of the single-chip microcomputer, the output end of the fresh air valve control circuit is connected to the 21st port of the single-chip microcomputer, the input end of the heating motor drive circuit is respectively connected to the third port, the fifth port, and the sixth port of the single-chip microcomputer, and the input end of the air conditioning compressor speed control circuit is connected to the sixteenth interface of the single-chip microcomputer.

[0009] Optionally, the heating switch circuit includes:

[0010] an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, and a seventh capacitor, wherein one end of the eleventh resistor is connected to a 5VDC power supply, and one end is connected to the twelfth resistor and the first gear of the S1 switch; one end of the twelfth resistor is connected to the eleventh resistor and the first gear of the S1 switch, and one end is connected to the thirteenth resistor and the second gear of the S1 switch; one end of the thirteenth resistor is connected to the twelfth resistor and the second gear of the S1 switch, and one end is connected to the fourteenth resistor and the third gear of the S1 switch; one end of the fourteenth resistor is connected to the thirteenth resistor and the third gear of the S1 switch, and one end is connected to the fifteenth resistor and the fourth gear of the S1 switch; one end of the fifteenth resistor is connected to the fourteenth resistor and the fourth gear of the S1 switch, and one end is connected to the fifth gear of the S1 switch and is grounded; one end of the sixteenth resistor is connected to the fifth gear of the S1 switch, and one end is connected to the seventeenth resistor, the seventh capacitor and the signal output end; one end of the seventeenth resistor is connected to a 5VDC power supply, and one end is connected to the sixteenth resistor, the seventh capacitor and the signal output end; one end of the seventh capacitor is connected to the sixteenth resistor, the seventeenth resistor, and the signal output end, and one end is grounded.

[0011] Optionally, the air conditioner condenser drive voltage monitoring circuit includes:

[0012] The twenty-second resistor, the twenty-third resistor, the eleventh diode, and the twelfth diode, wherein one end of the twenty-second resistor is connected to the twenty-third resistor and the anode of the eleventh diode, and the other end is grounded; one end of the twenty-third resistor is connected to the twenty-second resistor and the anode of the eleventh diode, and the other end is connected to the signal output terminal; the anode of the eleventh diode is connected to the twenty-second resistor, the twenty-third resistor, and the cathode of the twelfth diode, and the cathode is connected to a 5VDC power supply; one end of the twelfth diode is connected to the signal input terminal and the anode of the eleventh diode, and the other end is grounded.

[0013] Optionally, the air conditioner condenser drive circuit includes:

[0014] a first driver, a first field effect transistor, an eighth capacitor, a tenth capacitor, a twelfth capacitor, a thirteenth capacitor, an eighteenth resistor, a fourth diode, a sixth diode, and an eighth diode, wherein the first port of the first driver is connected to a 12VDC power supply, an eighth capacitor, and a fourth diode, the second port of the first driver is connected to an input signal terminal, the third port of the first driver and the fourth port of the first driver are grounded, the fifth port of the first driver is connected to a sixth diode, an eighth diode, an eighteenth resistor, a tenth capacitor, a source of the first field effect transistor, and a thirteenth capacitor, the sixth port of the first driver is connected to a gate of the first field effect transistor and a tenth capacitor and a sixth diode, the seventh port of the first driver is connected to a gate of the first field effect transistor and a tenth capacitor and a sixth diode, the eighth port of the first driver is connected to a sixth diode, a fourth diode, and a gate of the first field effect transistor, the first port of the second driver is connected to a 12VDC power supply, a ninth capacitor, and a fifth diode, the second port of the second driver is connected to an input signal terminal, the third port of the second driver and the fourth port of the second driver are grounded, the fifth port of the second driver is connected to a seventh diode, a ninth diode, a nineteenth resistor, an eleventh capacitor, a source of the second field effect transistor, and a fifteenth capacitor, The sixth port of the driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the seventh port of the second driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the eighth port of the second driver is connected to the seventh diode, the fifth diode and the gate of the second field effect transistor, the gate of the first field effect transistor is connected to the tenth capacitor, the sixth diode and the sixth port and the seventh port of the first driver, the source of the first field effect transistor is connected to the fifth port of the first driver, the drain of the first field effect transistor is connected to the twelfth capacitor and the signal output end, one end of the eighth capacitor is connected to the first port of the first driver and the other end is grounded, one end of the tenth capacitor is connected to the gate of the first field effect transistor and the other end is connected to the fifth port of the first driver, one end of the twelfth capacitor is connected to the drain of the first field effect transistor and the other end is grounded, one end of the thirteenth capacitor is connected to the source of the first field effect transistor and the other end is grounded, one end of the eighteenth resistor is connected to the fifth port of the first driver and the other end is grounded, the positive electrode of the fourth diode is connected to the first port of the first driver, and the negative electrode is connected to the eighth port of the first driver, one end of the sixth diode is connected to the eighth port of the first driver and the other end is connected to the fifth port of the first driver, and one end of the eighth diode is connected to the fifth port of the first driver and the other end is grounded.

[0015] Optionally, the air conditioner evaporator driving circuit includes:

[0016] The second driver, the second field effect transistor, the ninth capacitor, the eleventh capacitor, the fourteenth capacitor, the fifteenth capacitor, the nineteenth resistor, the fifth diode, the seventh diode, and the ninth diode, wherein the first port of the second driver is connected to the 12VDC power supply, the ninth capacitor and the fifth diode, the second port of the second driver is connected to the input signal terminal, the third port of the second driver and the fourth port of the second driver are grounded, the fifth port of the second driver is connected to the seventh diode, the ninth diode, the nineteenth resistor, the eleventh capacitor, the source of the second field effect transistor, and the fifteenth capacitor, the sixth port of the second driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the seventh port of the second driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the eighth port of the second driver is connected to the seventh diode, the fifth diode and the gate of the second field effect transistor, and the gate of the second field effect transistor is connected The eleventh capacitor, the seventh diode and the sixth port and the seventh port of the second driver are connected, the source of the second field effect transistor is connected to the fifth port of the second driver, the drain of the second field effect transistor is connected to the fourteenth capacitor and the signal output terminal, one end of the ninth capacitor is connected to the first port of the second driver, and the other end is grounded, one end of the eleventh capacitor is connected to the gate of the second field effect transistor, and the other end is connected to the fifth port of the second driver, one end of the fourteenth capacitor is connected to the drain of the second field effect transistor, and the other end is grounded, one end of the fifteenth capacitor is connected to the source of the second field effect transistor, and the other end is grounded, one end of the nineteenth resistor is connected to the fifth port of the second driver, and the other end is grounded, the positive electrode of the fifth diode is connected to the first port of the second driver, and the negative electrode is connected to the eighth port of the second driver, one end of the seventh diode is connected to the eighth port of the second driver, and one end is connected to the fifth port of the second driver, and one end of the ninth diode is connected to the fifth port of the second driver, and one end is grounded.

[0017] Optionally, the air conditioning compressor switch circuit includes:

[0018] A first photocoupler, a twentieth resistor, a twenty-first resistor, and a tenth diode, wherein the first input terminal of the first photocoupler is connected to the twentieth resistor, the second input terminal of the first photocoupler is grounded, the third output terminal of the first photocoupler and the fifth output terminal of the first photocoupler are connected to the CENTER_CONSOLE_PANEL_PWR signal output terminal, the fourth output terminal of the first photocoupler is connected to the twenty-first resistor, the tenth diode and the COMPRESSOR_REMOTE_ON / OFF signal output terminal, the twentieth resistor is connected to the first input terminal of the first photocoupler, one end of the twenty-first resistor is connected to the fourth output terminal of the first photocoupler, and one end is grounded, the positive electrode of the tenth diode is grounded, and the negative electrode is connected to the COMPRESSOR_REMOTE_ON / OFF signal output terminal.

[0019] Optionally, the fresh air valve control circuit includes:

[0020] A first operational amplifier, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a sixteenth capacitor, and a seventeenth capacitor, wherein the third port of the first operational amplifier is connected to the DAC signal input terminal, the fourth port of the first operational amplifier is connected to the twenty-fourth resistor and the twenty-sixth resistor, the fifth port of the first operational amplifier is connected to the 12VDC power supply, the second port is grounded, the first port is connected to the twenty-fifth resistor, one end of the twenty-fourth resistor is connected to the fourth interface of the first operational amplifier, and the other end is grounded, one end of the twenty-fifth resistor is connected to the first interface of the first operational amplifier, and one end is connected to the twenty-sixth resistor and the sixteenth capacitor, one end of the twenty-sixth resistor is connected to the fourth interface of the first operational amplifier, and one end is connected to the twenty-fifth resistor, one end of the twenty-seventh resistor is connected to the seventeenth capacitor and the twenty-eighth resistor, and one end is connected to the signal output terminal, one end of the twenty-eighth resistor is connected to the seventeenth capacitor and the twenty-seventh resistor, and one end is grounded, one end of the sixteenth capacitor is connected to the twenty-fifth resistor and the signal output terminal, and one end is grounded, and one end of the seventeenth capacitor is connected to the signal input terminal and the twenty-eighth resistor, and one end is grounded.

[0021] Optionally, the heating motor driving circuit includes:

[0022] The first heating motor driver, the twenty-ninth resistor, the eighteenth capacitor, the nineteenth capacitor, the twentieth capacitor, the twenty-first capacitor, the thirteenth diode, and the fourteenth diode, wherein the first port of the first heating motor driver is grounded, the second port of the first heating motor driver is connected to the MOTOR_DIR_B signal input terminal, the third port of the first heating motor driver is connected to the MOTOR_DIR_A signal input terminal, the fourth port of the first heating motor driver is connected to the MOTOR_FAULT signal input terminal, the fifth port of the first heating motor driver is connected to the eighteenth capacitor, the sixth port of the first heating motor driver is connected to the twenty-first capacitor, and the seventh port of the first heating motor driver is connected The twenty-ninth resistor and the eighth port of the first heating motor driver are connected to the twentieth capacitor, one end of the twenty-ninth resistor is connected to the seventh interface of the first heating motor driver, and the other end is grounded, one end of the eighteenth capacitor is connected to the fifth interface of the first heating motor driver, and the other end is grounded, one end of the nineteenth capacitor is connected to the fifth interface of the first heating motor driver, and the other end is grounded, one end of the 20th capacitor is connected to the eighth interface of the first heating motor driver, and the other end is grounded, one end of the twenty-first capacitor is connected to the sixth interface of the first heating motor driver, and the other end is grounded, the positive pole of the thirteenth diode is grounded, and the negative pole is connected to the eighth interface of the first heating motor driver, and the positive pole of the fourteenth diode is grounded, and the negative pole is connected to the sixth interface of the first heating motor driver.

[0023] Optionally, the air-conditioning compressor speed control circuit includes: a 30th resistor, a 31st resistor, a 22nd capacitor, and a 15th diode, wherein one end of the 30th resistor is connected to a 5VDC power supply, and one end is connected to the 31st resistor and the AC_COMPRESSOR_SPEED_CTRL_OUT signal output end, one end of the 31st resistor is connected to the 30th resistor and the AC_COMPRESSOR_SPEED_CTRL_OUT signal output end, and one end is connected to the signal AC_COMP_SPEED input end, one end of the 22nd capacitor is connected to the 30th resistor and the 31st resistor, and one end is grounded, and the positive electrode of the 15th diode is grounded, and the negative electrode is connected to the AC_COMPRESSOR_SPEED_CTRL_OUT signal output end and the 22nd capacitor.

[0024] In summary, the cabin environment system control device described in this application has the following advantages:

[0025] 1. This cockpit environment system control device realizes automatic control of the fresh air valve by the aircraft electronic control system according to the position status parameters of the fresh air / air conditioning switch;

[0026] 2. This cabin environment system control device realizes automatic control of the air conditioning compressor, air conditioning compressor speed, air conditioning condenser, and air conditioning evaporator according to the fresh air / air conditioning switch position status parameters, ignition switch position status parameters, and air conditioning condenser drive voltage monitoring data;

[0027] 3. This cabin environment system control device realizes automatic control of the heating valve according to the position of the heating switch;

[0028] 4. This cabin environment system control device realizes system power control by realizing automatic control of the air-conditioning evaporator, air-conditioning compressor, air-conditioning condenser, air-conditioning compressor speed, fresh air valve, and heating valve;

[0029] 5. This cockpit environment system control device can greatly reduce the pilot's workload while meeting system requirements, while increasing the safety of the system and improving the intelligence level of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings are examples of specific implementation methods of the present application.

[0031] Figure 1 This is a functional flow chart of the cabin environment control system of the embodiment of the utility model;

[0032] Figure 2 This is a principle block diagram of the technical solution of the cabin environment control system of the embodiment of the utility model;

[0033] Figure 3This is the circuit diagram of the fresh air / air conditioning five-speed switch S1 of the cabin environment control system of the utility model embodiment;

[0034] Figure 4 This is a circuit diagram of a five-speed heating switch S2 of a cabin environment control system according to an embodiment of the utility model;

[0035] Figure 5 This is a circuit diagram of the air conditioning condenser driving circuit of the cabin environment control system of the utility model embodiment;

[0036] Figure 6 This is a circuit diagram of an evaporator driving circuit of a cabin environment control system according to an embodiment of the utility model;

[0037] Figure 7 This is a circuit diagram of an air conditioning compressor switch of a cabin environment control system of an embodiment of the utility model;

[0038] Figure 8 This is a circuit diagram of the air conditioning condenser driving voltage monitoring circuit of the cabin environment control system of the utility model embodiment;

[0039] Fig. 9 This is a fresh air valve control circuit diagram of a cabin environment control system according to an embodiment of the utility model;

[0040] Fig.10 This is a heating motor driving circuit diagram of a cabin environment control system according to an embodiment of the utility model;

[0041] Fig.11 This is a circuit diagram of the air conditioning compressor speed control of the cabin environment control system of the utility model embodiment;

[0042] Fig.12 This is a circuit diagram of a single-chip microcomputer system of a cockpit environment control system of an embodiment of the utility model;

[0043] Fig.13 It is a CAN bus circuit diagram of a cabin environment control system of an embodiment of the utility model;

[0044] Fig.14 It is a schematic diagram of the software architecture of the cockpit environment control system of the utility model embodiment; DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technology in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. The embodiments of the present invention disclosed in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0046] The present invention provides a cockpit environment system control device, the functional flow chart is as follows Figure 1As shown, the power is received from the power supply on the aircraft for voltage regulation, and the voltage is adjusted to 12V and 5V respectively, which are used for power supply of all internal components; a heating switch is set, which is a five-speed rotary switch, corresponding to OFF, heating gear 1, heating gear 2, heating gear 3, and heating gear 4 respectively. According to the position of the heating switch, the heating valve is set to different positions; a fresh air / air conditioning switch is set, which is a five-speed rotary switch, corresponding to OFF, FRESH AIR, A / C 1, A / C 2, and A / C 3 respectively. According to the position of the fresh air / air conditioning switch, the position of the fresh air valve is set, and the speed of the air conditioning compressor, the air conditioning condenser, and the air conditioning evaporator are set to be turned on / off; a light guide plate and its driver are provided, the functions are marked according to the corresponding positions of the switches, and LEDs are used for light guide lighting.

[0047] Specifically, the utility model provides a cockpit environment system control device, such as Figure 2 As shown, including:

[0048] Input unit: fresh air / air conditioning five-speed switch S1 circuit, heating five-speed switch S2 circuit, air conditioning condenser drive voltage monitoring circuit, CAN bus circuit,

[0049] Output unit: air conditioner condenser and evaporator drive circuit, air conditioner compressor switch circuit, fresh air valve control circuit, heating motor drive circuit, air conditioner compressor speed control circuit,

[0050] Single chip microcomputer circuit;

[0051] The input unit includes: a fresh air / air conditioning five-speed switch S1 circuit, a heating five-speed switch S2 circuit, and an air conditioning condenser drive voltage monitoring circuit.

[0052] Fresh air / air conditioning five-speed switch S1 circuit Figure 3As shown, it includes: a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and a sixth capacitor D6, wherein one end of the fourth resistor R4 is connected to a 5VDC power supply, and one end is connected to the fifth resistor R5 and the first gear of the S1 switch; one end of the fifth resistor R5 is connected to the fourth resistor R4 and the first gear of the S1 switch, and one end is connected to the sixth resistor R6 and the second gear of the S1 switch; one end of the sixth resistor R6 is connected to the fifth resistor R5 and the second gear of the S1 switch, and one end is connected to the seventh resistor R7 and the third gear of the S1 switch; one end of the seventh resistor R7 is connected to the sixth resistor R6 The resistor R6 and the third gear of the S1 switch, one end is connected to the eighth resistor R8 and the fourth gear of the S1 switch, one end of the eighth resistor R8 is connected to the seventh resistor R7 and the fourth gear of the S1 switch, one end is connected to the fifth gear of the S1 switch and is grounded, one end of the ninth resistor R9 is connected to the fifth gear of the S1 switch, one end is connected to the tenth resistor R10, the sixth capacitor D6 and the signal output end, one end of the tenth resistor R10 is connected to a 5VDC power supply, one end is connected to the ninth resistor R9, the sixth capacitor D6 and the AC_SW_IN signal output end, one end of the sixth capacitor D6 is connected to the ninth resistor R9, the tenth resistor R10, the signal output end, and one end is grounded. Among them, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, and the eighth resistor R8 are used to divide the 5VDC voltage to generate voltages of different gears. The ninth resistor R9 and the sixth capacitor C6 constitute a de-jitter filtering circuit, which is used to remove jitter during the switching process of the fresh air / air conditioning five-speed switch S1 to avoid causing data errors at the microcontroller port. The tenth resistor R10 connects the 5VDC voltage to the microcontroller port, so that the microcontroller port is in a pull-up state during the switching of the switch gear.

[0053] The heating five-speed switch S2 circuit is as follows Figure 4As shown, it includes: an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, and a seventh capacitor C7, wherein one end of the eleventh resistor R11 is connected to a 5VDC power supply, and one end is connected to the twelfth resistor R12 and the first gear of the S1 switch, one end of the twelfth resistor R12 is connected to the eleventh resistor R11 and the first gear of the S1 switch, and one end is connected to the thirteenth resistor R13 and the second gear of the S1 switch, one end of the thirteenth resistor R13 is connected to the twelfth resistor R12 and the second gear of the S1 switch, and one end is connected to the fourteenth resistor R14 and the third gear of the S1 switch, and the fourteenth resistor R14 is connected to the twelfth resistor R12 and the second gear of the S1 switch. One end is connected to the thirteenth resistor R13 and the third gear of the S1 switch, one end is connected to the fifteenth resistor R15 and the fourth gear of the S1 switch, one end of the fifteenth resistor R15 is connected to the fourteenth resistor R14 and the fourth gear of the S1 switch, one end is connected to the fifth gear of the S1 switch and is grounded, one end of the sixteenth resistor R16 is connected to the fifth gear of the S1 switch, one end is connected to the seventeenth resistor R17, the seventh capacitor C7 and the HEAT_SW_IN signal output terminal, one end of the seventeenth resistor R17 is connected to the 5VDC power supply, one end is connected to the sixteenth resistor R16, the seventh capacitor C7 and the signal output terminal, one end of the seventh capacitor C7 is connected to the sixteenth resistor R16, the seventeenth resistor R17, the signal output terminal, and one end is grounded. Among them, the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the fourteenth resistor R14, and the fifteenth resistor R15 are used to divide the 5VDC voltage to generate voltages of different gears. The sixteenth resistor R16 and the seventh capacitor C7 constitute a de-jitter filter circuit, which is used to remove jitter during the switching process of the five-speed heating switch S2 to avoid causing data errors at the microcontroller port. The seventeenth resistor R17 connects the 5VDC voltage to the microcontroller port, so that the microcontroller port is in a pull-up state during the switching of the switch gear.

[0054] Air conditioner condenser drive voltage monitoring circuit Figure 8 As shown, it includes: a twenty-second resistor R22, a twenty-third resistor R23, an eleventh diode D11, and a twelfth diode D12, wherein one end of the twenty-second resistor R22 is connected to the twenty-third resistor R23 and the positive electrode of the eleventh diode D11, and one end is grounded, one end of the twenty-third resistor R23 is connected to the twenty-second resistor R22 and the positive electrode of the eleventh diode D11, and one end is connected to the signal output end, the positive electrode of the eleventh diode D11 is connected to the twenty-second resistor R22, the twenty-third resistor R23, and the negative electrode of the twelfth diode D12, and the negative electrode is connected to a 5VDC power supply, one end of the twelfth diode D12 is connected to the signal input end and the positive electrode of the eleventh diode D11, and one end is grounded. The twenty-second R22 and the twenty-third resistor R23 are used for voltage division, and the eleventh diode D11 and the twelfth diode D12 limit the voltage after voltage division to between 5.47V and -0.47V to protect the single-chip computer port.

[0055] CAN bus circuit such as Fig.13 As shown, it includes: a CAN transceiver U10, a twenty-eighth capacitor C28, a twenty-first diode D21, and a forty-fourth resistor R44, wherein the first port of the CAN transceiver U10 is connected to the signal CAN_TX input terminal, the second port of the CAN transceiver U10 is grounded, one end of the third port of the CAN transceiver U10 is connected to a 5VDC power supply, and the other end is connected to the twenty-eighth capacitor C28, the fourth port of the CAN transceiver U10 is connected to the CAN_RX signal input terminal, the eighth port of the CAN transceiver U10 is grounded, and the sixth port of the CAN transceiver U10 is connected to the twenty-first diode D21 and the CAN_HI signal output terminal , the seventh port of the CAN transceiver U10 is connected to the twenty-first diode D21 and the CAN_LO signal output terminal, one end of the twenty-eighth capacitor C28 is connected to the third port of the CAN transceiver U10, and one end is grounded, one end of the twenty-first diode D21 is connected to the seventh port of the CAN transceiver U10 and the CAN_HI signal output terminal, and one end is connected to the sixth port of the CAN transceiver U10 and the CAN_LO signal output terminal, and one end of the forty-fourth resistor R44 is connected to the seventh port of the CAN transceiver U10 and the CAN_HI signal output terminal, and one end is connected to the sixth port of the CAN transceiver U10 and the CAN_LO signal output terminal. The twenty-first diode D21 provides transient protection on the CAN bus, and the thirtieth capacitor C30 is a decoupling capacitor.

[0056] The output unit includes: an air conditioner condenser and evaporator drive circuit, an air conditioner compressor switch circuit, a fresh air valve control circuit, a heating motor drive circuit, and an air conditioner compressor speed control circuit.

[0057] The air conditioner condenser driving circuit is as follows Figure 5 As shown, including:

[0058] The first driver U3, the first field effect transistor Q1, the eighth capacitor C8, the tenth capacitor C10, the twelfth capacitor C12, the thirteenth capacitor C13, the eighteenth resistor R18, the fourth diode D4, the sixth diode D6, and the eighth diode D8, wherein the first port of the first driver U3 is connected to the 12VDC power supply, the eighth capacitor C8 and the fourth diode D4, the second port of the first driver U3 is connected to the COND_COMP signal input terminal, the third port of the first driver U3 and the fourth port of the first driver U3 are grounded, and the fifth port of the first driver U3 is connected to the sixth diode D6, the eighth diode D8, the eighteenth resistor R18, the tenth capacitor C10, the source of the first field effect transistor Q1, and the thirteenth diode D8. Capacitor C13, the sixth port of the first driver U3 is connected to the gate of the first field effect transistor Q1 and the tenth capacitor C10 and the sixth diode D6, the seventh port of the first driver U3 is connected to the gate of the first field effect transistor Q1 and the tenth capacitor C10 and the sixth diode D6, the eighth port of the first driver U3 is connected to the sixth diode D6, the fourth diode D4 and the gate of the first field effect transistor Q1, the first port of the second driver is connected to the 12VDC power supply, the ninth capacitor and the fifth diode, the second port of the second driver is connected to the input signal terminal, the third port of the second driver and the fourth port of the second driver are grounded, the fifth port of the second driver is connected to the seventh diode, the ninth diode, the nineteenth resistor, the eleventh capacitor, the second field effect The transistor source, the fifteenth capacitor, the sixth port of the second driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the seventh port of the second driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the eighth port of the second driver is connected to the seventh diode, the fifth diode and the second field effect transistor gate, the gate of the first field effect transistor Q1 is connected to the tenth capacitor C10, the sixth diode D6 and the sixth port and the seventh port of the first driver U3, the source of the first field effect transistor Q1 is connected to the fifth port of the first driver U3, the drain of the first field effect transistor Q1 is connected to the twelfth capacitor C12 and the signal output end, one end of the eighth capacitor C8 is connected to the first port of the first driver U3, One end is grounded, one end of the tenth capacitor C10 is connected to the gate of the first field effect transistor Q1, and the other end is connected to the fifth port of the first driver U3, one end of the twelfth capacitor C12 is connected to the drain of the first field effect transistor Q1, and the other end is grounded, one end of the thirteenth capacitor C13 is connected to the source of the first field effect transistor Q1, and the other end is grounded, one end of the eighteenth resistor R18 is connected to the fifth port of the first driver U3, and the other end is grounded, the anode of the fourth diode D4 is connected to the first port of the first driver U3, and the cathode is connected to the eighth port of the first driver U3, one end of the sixth diode D6 is connected to the eighth port of the first driver U3, and one end is connected to the fifth port of the first driver U3, and one end of the eighth diode D8 is connected to the fifth port of the first driver U3, and one end is grounded.The first field effect transistor Q1 is used to turn on and off the condenser drive circuit, the first driver U3 is the gate driver of the first field effect transistor Q1, and contains a charge pump inside to achieve continuous output, and the overvoltage protection function of the gate driver is not used. The tenth capacitor C10 provides the first field effect transistor Q1 with an initial charge, the eighteenth resistor R18 is used for the charging circuit of the eleventh capacitor C11, the fourth diode D4 is used to limit the charging voltage of the tenth capacitor C10, the sixth diode D6 is used to protect the gate voltage of the first field effect transistor Q1 to prevent the voltage from exceeding the allowable range, and the eighth capacitor C8 provides input power filtering.

[0059] The air conditioner evaporator driving circuit is as follows Figure 6As shown, it includes: a second driver U4, a second field effect transistor Q2, a ninth capacitor C9, an eleventh capacitor C11, a fourteenth capacitor C14, a fifteenth capacitor C15, a nineteenth resistor R19, a fifth diode D5, a seventh diode D7, and a ninth diode D9, wherein the first port of the second driver U4 is connected to a 12VDC power supply, the ninth capacitor C9 and the fifth diode D5, the second port of the second driver U4 is connected to a COND_COMP signal input terminal, the third port of the second driver U4 and the fourth port of the second driver U4 are grounded, the fifth port of the second driver U4 is connected to the seventh diode D7, the ninth diode D9, the nineteenth resistor R19, the eleventh capacitor C11, the source of the second field effect transistor Q2, and the fifteenth capacitor C15, the sixth port of the second driver U4 is connected to the gate of the second field effect transistor Q2 and the eleventh capacitor C11 and the seventh diode D7, the seventh port of the second driver U4 is connected to the gate of the second field effect transistor Q2 and the eleventh capacitor C11 and the seventh diode D7, and the eighth port of the second driver U4 is connected to the seventh diode D7, the fifth diode D5 and the second field effect transistor The gate of the second field effect transistor Q2 is connected to the eleventh capacitor C11, the seventh diode D7 and the sixth port and the seventh port of the second driver U4, the source of the second field effect transistor Q2 is connected to the fifth port of the second driver U4, the drain of the second field effect transistor Q2 is connected to the fourteenth capacitor C14 and the signal output terminal, one end of the ninth capacitor C9 is connected to the first port of the second driver U4, and the other end is grounded, one end of the eleventh capacitor C11 is connected to the gate of the second field effect transistor Q2, and one end is connected to the fifth port of the second driver U4, and the fourteenth capacitor C14 is connected to the fifth port of the second driver U4. 4 is connected to the drain of the second field effect transistor Q2 at one end and to ground at one end, the fifteenth capacitor C15 is connected to the source of the second field effect transistor Q2 at one end and to ground at one end, the nineteenth resistor R19 is connected to the fifth port of the second driver U4 at one end and to ground at one end, the fifth diode D5 is connected to the first port of the second driver U4 at the anode and the eighth port of the second driver U4 at the cathode, the seventh diode D7 is connected to the eighth port of the second driver U4 at one end and to the fifth port of the second driver U4 at one end, the ninth diode D9 is connected to the fifth port of the second driver U4 at one end and to ground at one end. The second field effect transistor Q2 is used to turn on and off the evaporator drive circuit, the second driver U4 is the gate driver of the second field effect transistor Q2, and contains a charge pump inside to achieve continuous output, and the overvoltage protection function of the gate driver is not used. The eleventh capacitor C11 provides an initial charge for the second field effect transistor Q2, the nineteenth resistor R19 is used for the charging circuit of the eleventh capacitor C11, the fifth diode D5 is used to limit the charging voltage of the eleventh capacitor C11, the seventh diode D7 is used to protect the gate voltage of the second field effect transistor Q2 to prevent the voltage from exceeding the allowable range, and the ninth capacitor C9 provides filtering for the input power supply.

[0060] Air conditioning compressor switch circuit Figure 7 As shown, it includes: a first photoelectric coupler K1, a twentieth resistor R20, a twenty-first resistor R21, and a tenth diode D10, wherein the first input end of the first photoelectric coupler K1 is connected to the twentieth resistor R20, the second input end of the first photoelectric coupler K1 is grounded, the third output end of the first photoelectric coupler K1 and the fifth output end of the first photoelectric coupler K1 are connected to the CENTER_CONSOLE_PANEL_PWR signal output end, the fourth output end of the first photoelectric coupler K1 is connected to the twenty-first resistor R21, the tenth diode D10 and the COMPRESSOR_REMOTE_ON / OFF signal output end, the twentieth resistor R20 is connected to the first input end of the first photoelectric coupler K1, one end of the twenty-first resistor R21 is connected to the fourth output end of the first photoelectric coupler K1, and one end is grounded, the positive electrode of the tenth diode D10 is grounded, and the negative electrode is connected to the COMPRESSOR_REMOTE_ON / OFF signal output end. The twentieth resistor R20 is used for current limiting, the twenty-first resistor R21 is a pull-down resistor to ensure that the line is at a low level when there is no voltage input, and the seventh diode D7 is used for transient protection.

[0061] Fresh air valve control circuit Fig. 9 As shown, including:

[0062] a first operational amplifier U5, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a sixteenth capacitor C16, and a seventeenth capacitor C17, wherein a third port of the first operational amplifier U5 is connected to a DAC signal input terminal, a fourth port of the first operational amplifier U5 is connected to the twenty-fourth resistor R24 ​​and the twenty-sixth resistor R26, a fifth port of the first operational amplifier U5 is connected to a 12VDC power supply, a second port of the first operational amplifier U5 is grounded, a first port of the first operational amplifier U5 is connected to the twenty-fifth resistor R25, one end of the twenty-fourth resistor R24 ​​is connected to the fourth interface of the first operational amplifier U5, and one end is grounded, One end of the 25th resistor R25 is connected to the first interface of the first operational amplifier U5, and one end is connected to the 26th resistor R26 and the 16th capacitor C16. One end of the 26th resistor R26 is connected to the fourth interface of the first operational amplifier U5, and one end is connected to the 25th resistor R25. One end of the 27th resistor R27 is connected to the 17th capacitor C17 and the 28th resistor R28, and one end is connected to the signal output end. One end of the 28th resistor R28 is connected to the 17th capacitor C17 and the 27th resistor R27, and one end is grounded. One end of the 16th capacitor C16 is connected to the 25th resistor R25 and the signal output end, and one end is grounded. One end of the 17th capacitor C17 is connected to the signal input end and the 28th resistor R28, and one end is grounded. Among them, the first operational amplifier U5 is a common-phase operational amplifier, which converts the 0-5V analog voltage output by the single-chip microcomputer into 0-12V. The 16th capacitor C16 and the 17th capacitor C17 provide overvoltage transient protection.

[0063] Heating motor drive circuit Fig.10 As shown, including:

[0064] The first heating motor driver U6, the twenty-ninth resistor R29, the eighteenth capacitor C18, the nineteenth capacitor C19, the twentieth capacitor C20, the twenty-first capacitor C21, the thirteenth diode D13, and the fourteenth diode D14, wherein the first port of the first heating motor driver U6 is grounded, the second port of the first heating motor driver U6 is connected to the MOTOR_DIR_B signal input terminal, the third port of the first heating motor driver U6 is connected to the MOTOR_DIR_A signal input terminal, the fourth port of the first heating motor driver U6 is connected to the MOTOR_FAULT signal input terminal, the fifth port of the first heating motor driver U6 is connected to the eighteenth capacitor C18, the sixth port of the first heating motor driver U6 is connected to the twenty-first capacitor C21, and the seventh port of the first heating motor driver U6 is connected The 29th resistor R29, the 8th port of the first heating motor driver U6 is connected to the 20th capacitor C20, one end of the 29th resistor R29 is connected to the 7th interface of the first heating motor driver U6, and one end is grounded, one end of the 18th capacitor C18 is connected to the 5th interface of the first heating motor driver U6, and one end is grounded, one end of the 19th capacitor C19 is connected to the 5th interface of the first heating motor driver U6, and one end is grounded, one end of the 20th capacitor C20 is connected to the 8th interface of the first heating motor driver U6, and one end is grounded, one end of the 21st capacitor C21 is connected to the 6th interface of the first heating motor driver U6, and one end is grounded, the positive pole of the 13th diode D13 is grounded, and the negative pole is connected to the 8th interface of the first heating motor driver U6, the positive pole of the 14th diode D14 is grounded, and the negative pole is connected to the 6th interface of the first heating motor driver U6. Among them, the 29th resistor R29 is a 0 ohm resistor, which is used to turn off the current regulation function of the first heating motor driver U6, and the 13th diode D13, the 14th diode D14, the 20th capacitor C20 and the 21st capacitor C21 are used to provide transient protection. Air conditioning compressor speed control circuit Fig.12As shown, it includes: a 30th resistor R30, a 31st resistor R31, a 22nd capacitor C22, and a 15th diode D15, wherein one end of the 30th resistor R30 is connected to a 5VDC power supply, and one end is connected to the 31st resistor R31 and the AC_COMPRESSOR_SPEED_CTRL_OUT signal output end; one end of the 31st resistor R31 is connected to the 30th resistor R30 and the AC_COMPRESSOR_SPEED_CTRL_OUT signal output end, and one end is connected to the signal AC_COMP_SPEED input end; one end of the 22nd capacitor C22 is connected to the 30th resistor R30 and the 31st resistor R31, and one end is grounded; the positive electrode of the 15th diode D15 is grounded, and the negative electrode is connected to the AC_COMPRESSOR_SPEED_CTRL_OUT signal output end and the 22nd capacitor C22. The 30th resistor R30 and the 31st resistor R31 perform voltage division. When the microcontroller output is low, the analog output is 1V, and when the output is high, the analog output is 5V. The 22nd capacitor C22 and the 15th diode D15 provide transient protection.

[0065] Microcontroller circuit such as Fig.12 As shown, including:

[0066] The first single-chip computer IC1, the first PCB board P1, the first quartz oscillator Y1, the twenty-third capacitor C23, the twenty-fourth capacitor C24, the twenty-fifth capacitor C25, the twenty-sixth capacitor C26, the twenty-seventh capacitor C27, the thirty-sixth resistor R36, the thirty-seventh resistor R37, the thirty-eighth resistor R38, the thirty-ninth resistor R39, the fortieth resistor R40, the forty-first resistor R41, the forty-second resistor R42, the sixteenth diode D16, the seventeenth diode D17, the eighteenth diode D18, and the nineteenth diode D19, wherein the first port of the first single-chip computer IC1 is connected to the first port of the first PCB board P1, the twenty-third capacitor C23 and the thirty-sixth resistor R36, and the first single-chip computer IC1 The second port is connected to the thirty-seventh resistor R37 and the twenty-fourth capacitor C24, the third port of the first single-chip computer IC1 is connected to the MOTOR_FAULT signal input terminal, the fourth port of the first single-chip computer IC1 is connected to the signal DAC1OUT1 output terminal, the fifth port of the first single-chip computer IC1 is connected to the MOTOR_DIR_A signal input terminal, the sixth port of the first single-chip computer IC1 is connected to the MOTOR_DIR_B signal input terminal, the seventh port of the first single-chip computer IC1 is connected to the thirty-eighth resistor R38 and the twenty-fifth capacitor C25, the eighth port of the first single-chip computer IC1 is connected to the first quartz oscillator Y1 port and then grounded, the ninth port of the first single-chip computer IC1 is connected to the third port of the first quartz oscillator Y1, and the first single-chip computer IC The tenth port of the first single-chip computer IC1 is connected to the CONDENSER_VOLTAGE_MONITOR signal input terminal, the eleventh port of the first single-chip computer IC1 is connected to the AC_SW_IN signal input terminal, the twelfth port of the first single-chip computer IC1 is connected to the HEAT_CLUTCH_CTRL signal input terminal, the thirteenth port of the first single-chip computer IC1 is connected to the forty-third resistor, the fourteenth port of the first single-chip computer IC1 is connected to the forty-second resistor R42, the sixteenth port of the first single-chip computer IC1 is connected to the AC_COMP_SPEED signal input terminal, the seventeenth port of the first single-chip computer IC1 is connected to the forty-first resistor R41, the eighteenth port of the first single-chip computer IC1 is connected to the fortieth resistor R40, the nineteenth port is grounded, and the The 20th port of the first single-chip microcomputer IC1 is connected to the 27th capacitor C27 and the 5VDC power supply, the 21st port of the first single-chip microcomputer IC1 is connected to the IC1_FRESH_SERVO_FB signal input terminal, the 22nd port of the first single-chip microcomputer IC1 is connected to the HEAT_SW_IN signal input terminal, the 23rd port of the first single-chip microcomputer IC1 is connected to the COND_COMP signal input terminal, the 24th port of the first single-chip microcomputer IC1 is connected to the CANRX signal output terminal, the 25th port of the first single-chip microcomputer IC1 is connected to the CANTX signal output terminal, the 27th port of the first single-chip microcomputer IC1 is connected to the fifth port of the first PCB board P1, the 28th port of the first single-chip microcomputer IC1 is connected to the fourth port of the first PCB board P1,The first port of the first PCB board P1 is connected to the first port of the first single-chip computer IC1, the second port of the first PCB board P1 is connected to the 5VDC power supply, the third port of the first PCB board P1 is grounded, the fourth port of the first PCB board P1 is connected to the twenty-eighth port of the first single-chip computer IC1, the fifth port of the first PCB board P1 is connected to the twenty-seventh port of the first single-chip computer IC1, the second port of the first quartz oscillator Y1 is connected to the eighth port of the first single-chip computer IC1 and then grounded, the third port of the first quartz oscillator Y1 is connected to the ninth port of the first single-chip computer IC1, the fourth port of the first quartz oscillator Y1 is connected to the twenty-sixth capacitor C26, and one end of the twenty-third capacitor C23 is connected to the thirty-fifth resistor and the thirty-sixth resistor R36 , one end is grounded, one end of the twenty-fourth capacitor C24 is connected to the thirty-seventh resistor R37 and the second port of the first single-chip computer IC1, and one end is grounded, one end of the twenty-fifth capacitor C25 is connected to the thirty-eighth resistor R38 and the seventh port of the first single-chip computer IC1, and one end is grounded, one end of the twenty-sixth capacitor C26 is connected to the fourth port of the first quartz oscillator Y1, and one end is grounded, one end of the twenty-seventh capacitor C27 is connected to the 20th port of the first single-chip computer IC1 and the 5VDC power supply, and one end is grounded, one end of the thirty-fifth resistor is connected to the 5VDC power supply, one end is connected to the thirty-sixth resistor R36 and the twenty-third capacitor C23, one end of the thirty-sixth resistor R36 is connected to the thirty-fifth resistor and the twenty-third capacitor C23, and one end is connected to the first single The first port of the microcontroller IC1, one end of the thirty-seventh resistor R37 is connected to the HEAT_MOTOR_POT_WIPER signal terminal, and one end is connected to the twenty-fourth capacitor C24 and the second port of the first microcontroller IC1, one end of the thirty-eighth capacitor is connected to the anode of the twentieth diode, and one end is connected to the twenty-fifth capacitor C25 and the seventh port of the first microcontroller IC1, one end of the thirty-ninth resistor R39 is connected to the 5VDC power supply, and one end is connected to the anode of the sixteenth diode D16, one end of the fortieth resistor R40 is connected to the eighteenth port of the first microcontroller IC1, and one end is connected to the anode of the seventeenth diode D17, one end of the forty-first resistor R41 is connected to the seventeenth port of the first microcontroller IC1, and one end is connected to the eighteenth diode D18 positive pole, one end of the 42nd resistor R42 is connected to the 14th port of the first single-chip computer IC1, and one end is connected to the positive pole of the 19th diode D19, one end of the 43rd resistor is connected to the 13th port of the first single-chip computer IC1, and one end is grounded, the positive pole of the 20th diode is connected to the 38th resistor R38, and the negative pole is connected to the IGN_SW_OFF_POS_IN signal input terminal, the positive pole of the 16th diode D16 is connected to the 39th resistor R39, and the negative pole is grounded, the positive pole of the 17th diode D17 is connected to the 40th resistor R40, and the negative pole is grounded, the positive pole of the 18th diode D18 is connected to the 41st resistor R41, and the negative pole is grounded, the positive pole of the 19th diode D19 is connected to the 42nd resistor R42, and the negative pole is grounded. Among them, the first single-chip computer IC1 is responsible for monitoring the two control switches,And according to the control switch state, signals are output to the heating valve motor, fresh air valve, air conditioning condenser, compressor and evaporator. The first single-chip microcomputer IC1 also reads the engine state and speed on the CAN bus and limits the air conditioning speed accordingly. The first PCB board P1 in the circuit is used for writing the internal program of the single-chip microcomputer. The RC network composed of the thirty-fifth resistor R35, the thirty-sixth resistor R36, and the twenty-third capacitor C23. The first PCB board P1 and the first single-chip microcomputer IC1 are connected to this RC network to realize the normal operation of the single-chip microcomputer. The first quartz oscillator Y1 is used to meet the tolerance requirements of the normal operation of the CAN external device. The twenty-sixth capacitor C26 is a decoupling Capacitors, the twenty-seventh capacitor C27 is a decoupling capacitor for the first single-chip microcomputer IC1, the thirty-seventh resistor R37 and the thirty-eighth resistor R38 are used to limit the current of the single-chip microcomputer port, respectively reading the heating motor feedback signal and the ignition switch status signal, the twenty-fourth capacitor C24 and the twenty-fifth capacitor C25 are used for filtering, the twentieth diode D20 is used to prevent reverse input, the thirty-ninth resistor R39, the fortieth resistor R40, the forty-first resistor R41, the forty-second resistor R42, the forty-third resistor R43, the sixteenth diode D16, the seventeenth diode D17, the eighteenth diode D18, and the nineteenth diode D19 are used for debugging circuits. ,

[0067] Combination Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 The utility model uses a combination of software and hardware to achieve automatic control.

[0068] Software architecture such as Fig.14 As shown, after the software is powered on, it executes the initialization of hardware, memory, and SBIT. After the initialization is completed, three functions are executed in the main loop: CAN data reading function, heating valve motor function, fresh air and air conditioning function. During the operation, the interrupt program is used to respond to inputs and timers, and the program is written through the PCB board in the microcontroller master control circuit.

[0069] The single chip microcomputer obtains the analog voltage signal AC_SW_IN from the fresh air / air conditioning five-speed switch S1 circuit, and converts the voltage signal into the corresponding switch state. If the switch position is invalid, the switch state is marked as invalid. If it is in position 1, it is marked as OFF. If it is in position 2, it is marked as FRESH_ON. If it is in position 3, it is marked as A / C 1. If it is in position 4, it is marked as A / C 2. If it is in position 5, it is marked as A / C 3.

[0070] The single chip microcomputer obtains the analog voltage signal HEAT_SW_IN from the heating five-speed switch S2 circuit, and converts the voltage signal into the corresponding switch state. If the switch position is invalid, the switch state is marked as invalid. If it is in position 1, it is marked as OFF. If it is in position 2, it is marked as HEAT LEVEL 1. If it is in position 3, it is marked as HEAT LEVEL 2. If it is in position 4, it is marked as HEAT LEVEL 3. If it is in position 5, it is marked as HEAT LEVEL 4.

[0071] The specific implementation can be divided into the following four situations:

[0072] 1. Automatic control of fresh air valve

[0073] The microcontroller outputs analog voltage signals DAC1OUT1 and IC1_FRESH_SERVO_FB through the fresh air and air conditioning functions. Fig.10 In the fresh air valve control circuit shown, the DAC1OUT1 signal drives the fresh air valve to the corresponding position, and the IC1_FRESH_SERVO_FB signal is fed back to the microcontroller for monitoring after voltage division.

[0074] When the five-position switch S1 for fresh air / air conditioning is set to OFF, A / C 1, A / C 2, A / C 3, the fresh air valve is closed;

[0075] When the fresh air / air conditioning five-speed switch S1 is set to FRESH AIR, the fresh air valve opens to 45±5 degrees, the air conditioning compressor is turned off, the air conditioning condenser is turned off, and the air conditioning evaporator is turned off;

[0076] 2. Automatic control of air conditioner evaporator speed

[0077] The MCU outputs the COND_COMP signal to the fresh air and air conditioning functions. Figure 5 In the air-conditioning evaporator drive circuit shown, in the drive circuit, the second field effect transistor Q2 is used to control the on and off of the evaporator drive circuit, and the second driver U4 is the gate driver of the second field effect transistor Q2, which contains a charge pump to achieve continuous output. The gate driver uses the undervoltage function of the VCC pin to set the undervoltage lockout to a nominal value of 7V. When the voltage drops below 7V, the second driver U4 commands the second field effect transistor Q2 to turn off. When the voltage rises above 7V, the second field effect transistor Q2 will automatically resume normal operation. When the fresh air and air conditioning functions are in the AC_AVAILABLE_FOR_LO_SPEED state, the evaporator gear is set according to the position of the fresh air / air conditioning five-speed switch S1.

[0078] When the fresh air / air conditioning five-speed switch S1 is set to OFF, the air conditioning evaporator speed is set to 0;

[0079] When the fresh air / air conditioning five-speed switch S1 is set to A / C 1, the air conditioning evaporator speed is set to 50%;

[0080] When the fresh air / air conditioning five-speed switch S1 is set to A / C 2, the air conditioning evaporator speed is set to 70%;

[0081] When the fresh air / air conditioning five-speed switch S1 is set to A / C 3, the air conditioning evaporator speed is set to 100%;

[0082] 3. Automatic control of air conditioning compressor on / off, air conditioning compressor speed, air conditioning condenser on / off, air conditioning evaporator on / off

[0083] The MCU outputs the COND_COMP signal to the fresh air and air conditioning functions. Figure 5 Figure 6 In the air-conditioning condenser drive circuit and the air-conditioning evaporator drive circuit shown, the first field effect transistor Q1 in the drive circuit is used to turn the condenser drive circuit on and off, and the second field effect transistor Q2 is used to control the on and off of the evaporator drive circuit. The first driver U3 and the second driver U4 are gate drivers of the first field effect transistor Q1 and the second field effect transistor Q2, respectively. The first driver U3 and the second driver U4 contain charge pumps to achieve continuous output. The gate driver uses the undervoltage function of the VCC pin to set the undervoltage lockout to a nominal value of 7V. When the voltage drops below 7V, the first driver U3 commands the first field effect transistor Q1 to turn off, and the second driver U4 commands the second field effect transistor Q2 to turn off, and the condenser and evaporator are turned off. When the voltage rises above 7V, the first field effect transistor Q1 and the second field effect transistor Q2 will automatically resume normal operation, and the condenser and evaporator will be turned on.

[0084] The air conditioner voltage monitoring circuit is used to monitor the condenser drive voltage, such as Figure 8 As shown, when the voltage is higher than 18V and lasts for at least 1 second, the device can use the power input. After the power voltage is divided, the AC COMPRESSORREMOTE ON / OFF OUTPUT signal is output to the microcontroller port. The output signal of the microcontroller is driven by Figure 7 The photocoupler shown is used to control the input of the 28V power supply, and the motor controller of the compressor is driven by the discrete 28V voltage input to turn on or off the air conditioning compressor;

[0085] The microcontroller outputs the AC_COMP_SPEED signal to Fig.12The air conditioning compressor speed control circuit shown provides the analog input required for compressor speed control. The compressor on the aircraft will drive the compressor at two speeds (low speed and high speed), corresponding to different analog inputs. When the microcontroller output is low, the analog output is 1V, and the air conditioning compressor speed is LOW; when the output is high, the analog output is 5V, and the air conditioning compressor speed is HIGH.

[0086] In addition, the MCU reads the engine status, channel A sensor status, channel B sensor status, and engine speed in the CAN data through the CAN data reading function, and obtains the ignition switch status through the MCU seventh port input signal IGN_SW_OFF_POS_IN.

[0087] The specific control methods are:

[0088] When the fresh air / air conditioning five-speed switch S1 is set to A / C 1, A / C 2, or A / C 3, and the ignition switch is OFF and the condenser drive power input is greater than 18V and lasts for more than 1 second, set the air conditioning compressor to on, the air conditioning compressor speed to HIGH, the air conditioning condenser to on, and the air conditioning evaporator to on;

[0089] When the fresh air / air conditioning five-speed switch S1 is set to A / C 1 or A / C 2 or A / C 3, the ignition switch is ON, the condenser drive power input is greater than 18V and lasts for more than 1 second, the engine channel A or B is valid for more than 2 seconds, the engine speed is valid, and the engine speed changes from 2000RPM to greater than 2300RPM and less than 5700RPM, set the air conditioning compressor to turn on, the air conditioning compressor speed to HIGH, the air conditioning condenser to turn on, and the air conditioning evaporator to turn on;

[0090] When the fresh air / air conditioning five-speed switch S1 is set to A / C 1 or A / C 2 or A / C 3, the ignition switch is ON, the condenser drive power input is greater than 18V and lasts for more than 1 second, the engine channel A or B is valid for more than 2 seconds, the engine speed is valid, and the engine speed changes from greater than 5700RPM to less than 5600RPM but greater than 2000RPM, set the air conditioning compressor to turn on, the air conditioning compressor speed to HIGH, the air conditioning condenser to turn on, and the air conditioning evaporator to turn on;

[0091] When the fresh air / air conditioning five-speed switch S1 is set to A / C 1 or A / C 2 or A / C 3, the ignition switch is ON, the condenser drive power input is greater than 18V and lasts for more than 1 second, the engine channel A or B is valid for more than 2 seconds, the engine speed is valid, and the engine speed changes from greater than 2300RPM and less than 5600RPM to less than 2000RPM, set the air conditioning compressor to on, the air conditioning compressor speed to LOW, the air conditioning condenser to on, and the air conditioning evaporator to on;

[0092] When the fresh air / air conditioning five-speed switch S1 is set to A / C 1 or A / C 2 or A / C 3, the ignition switch is ON, the condenser drive power input is greater than 18V and lasts for more than 1 second, the engine channel A or B is valid for more than 2 seconds, the engine speed is valid, and the engine speed changes from greater than 2300RPM and less than 5600RPM to greater than 5700RPM, set the air conditioning compressor to on, the air conditioning compressor speed to LOW, the air conditioning condenser to on, and the air conditioning evaporator to on;

[0093] When the fresh air / air conditioning five-speed switch S1 is set to A / C 1, A / C 2 or A / C 3, and the condenser drive power input is less than 18V and lasts for more than 1 second, the air conditioning compressor is set to off, the air conditioning condenser is set to off, and the air conditioning evaporator is set to off;

[0094] 4.Automatic control of heating valve

[0095] The microcontroller outputs the signals MOTOR_DIR_A, MOTOR_DIR_B and MOTOR_FAULT to the heating valve motor function. Fig.11 In the heating motor drive circuit shown, MOTOR_DIR_A, MOTOR_DIR_B, and MOTOR_FAULT signals drive the heating valve motor to the corresponding position. If the heating five-speed switch S2 is set to the OFF position, the heating valve control port is set to low, and the motor forward and reverse control ports are both set to low; if the heating five-speed switch S2 is not in the OFF position, the heating valve control port is set to high, the motor potentiometer position is read, and the motor forward or reverse signal is set according to the position state. After the potentiometer position reaches the specified position, the motor forward and reverse signals are set to low. Specifically,

[0096] When the heating five-speed switch S2 is set to the OFF position, the heating valve is closed;

[0097] When the heating five-speed switch S2 is set to the HEAT LEVEL 1 position, the heating valve opens to 8±5 degrees;

[0098] When the heating five-speed switch S2 is set to HEAT LEVEL 2, the heating valve opens to 19±5 degrees;

[0099] When the heating five-speed switch S2 is set to HEAT LEVEL 3, the heating valve opens to 38±5 degrees;

[0100] When the heating five-speed switch S2 is set to the HEAT LEVEL 4 position, the heating valve opens to 76±5 degrees;

[0101] When the power is off, the heating valve is closed.

[0102] In summary, the cockpit environment system control device of the utility model collects and identifies the heating switch gear, cooling switch gear, ignition switch position, engine CAN data, and automatically realizes the coordinated work of the air-conditioning evaporator, air-conditioning compressor, air-conditioning condenser, fresh air valve, and heating valve through software logic judgment. The driving of the cockpit environment system equipment is realized through hardware, and the logical control of the air-conditioning evaporator, air-conditioning compressor, air-conditioning condenser, air-conditioning compressor speed, fresh air valve, and heating valve is automatically realized through software. Under the premise of meeting the system requirements, the workload of the pilot is greatly reduced, and at the same time, the safety of the system can be increased, and the intelligence level of the aircraft can be improved.

[0103] Finally, it is to be noted that any modification or equivalent replacement of part or all of the technical features based on the device structure of the utility model and the technical solution of the described embodiment, which does not deviate from the essence of the corresponding technical solution of the utility model, belongs to the scope of the utility model of the device structure of the utility model and the described implementation scheme.

Claims

1. A cockpit environment system control device, characterized in that: include: Input unit: fresh air / air conditioning switch circuit, heating switch circuit, air conditioning condenser drive voltage monitoring circuit, Output unit: air conditioner condenser drive circuit, air conditioner evaporator drive circuit, air conditioner compressor switch circuit, fresh air valve control circuit, heating motor drive circuit, air conditioner compressor speed control circuit, Single chip microcomputer circuit; Among them, the output end of the power supply circuit is connected to the first port of the single-chip computer, the output end of the fresh air / air conditioning switch circuit is connected to the eleventh port of the single-chip computer, the output end of the heating switch circuit is connected to the twenty-second port of the single-chip computer, the input end of the air conditioning condenser drive voltage monitoring circuit is connected to the tenth port of the single-chip computer, and the input end of the CAN bus circuit is connected to the twenty-fourth port and the twenty-fifth port of the single-chip computer; The input end of the air conditioning condenser and evaporator drive circuit is connected to the 23rd interface of the single-chip microcomputer, the output end of the fresh air valve control circuit is connected to the 21st port of the single-chip microcomputer, the input end of the heating motor drive circuit is respectively connected to the third port, the fifth port, and the sixth port of the single-chip microcomputer, and the input end of the air conditioning compressor speed control circuit is connected to the sixteenth interface of the single-chip microcomputer.

2. The cockpit environment system control device according to claim 1, characterized in that: The fresh air / air conditioning switch circuit comprises: The fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the ninth resistor, the tenth resistor, and the sixth capacitor, wherein one end of the fourth resistor is connected to the 5VDC power supply, and one end is connected to the fifth resistor and the first gear of the S1 switch; one end of the fifth resistor is connected to the fourth resistor and the first gear of the S1 switch, and one end is connected to the sixth resistor and the second gear of the S1 switch; one end of the sixth resistor is connected to the fifth resistor and the second gear of the S1 switch, and one end is connected to the seventh resistor and the third gear of the S1 switch; one end of the seventh resistor is connected to the sixth resistor and the third gear of the S1 switch, and one end is connected to the eighth resistor and the fourth gear of the S1 switch; one end of the eighth resistor is connected to the seventh resistor and the fourth gear of the S1 switch, and one end is connected to the fifth gear of the S1 switch and is grounded; one end of the ninth resistor is connected to the fifth gear of the S1 switch, and one end is connected to the tenth resistor, the sixth capacitor and the signal output end; one end of the tenth resistor is connected to the 5VDC power supply, and one end is connected to the ninth resistor, the sixth capacitor and the signal output end; one end of the sixth capacitor is connected to the ninth resistor, the tenth resistor, the signal output end, and one end is grounded.

3. The cockpit environment system control device according to claim 1, characterized in that: The heating switch circuit comprises: an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, and a seventh capacitor, wherein one end of the eleventh resistor is connected to a 5VDC power supply, and one end is connected to the twelfth resistor and the first gear of the S1 switch; one end of the twelfth resistor is connected to the eleventh resistor and the first gear of the S1 switch, and one end is connected to the thirteenth resistor and the second gear of the S1 switch; one end of the thirteenth resistor is connected to the twelfth resistor and the second gear of the S1 switch, and one end is connected to the fourteenth resistor and the third gear of the S1 switch; one end of the fourteenth resistor is connected to the thirteenth resistor and the third gear of the S1 switch, and one end is connected to the fifteenth resistor and the fourth gear of the S1 switch; one end of the fifteenth resistor is connected to the fourteenth resistor and the fourth gear of the S1 switch, and one end is connected to the fifth gear of the S1 switch and is grounded; one end of the sixteenth resistor is connected to the fifth gear of the S1 switch, and one end is connected to the seventeenth resistor, the seventh capacitor and the signal output end; one end of the seventeenth resistor is connected to a 5VDC power supply, and one end is connected to the sixteenth resistor, the seventh capacitor and the signal output end; one end of the seventh capacitor is connected to the sixteenth resistor, the seventeenth resistor, and the signal output end, and one end is grounded.

4. The cockpit environment system control device according to claim 1, characterized in that: The air conditioner condenser drive voltage monitoring circuit comprises: The twenty-second resistor, the twenty-third resistor, the eleventh diode, and the twelfth diode, wherein one end of the twenty-second resistor is connected to the twenty-third resistor and the anode of the eleventh diode, and the other end is grounded; one end of the twenty-third resistor is connected to the twenty-second resistor and the anode of the eleventh diode, and the other end is connected to the signal output terminal; the anode of the eleventh diode is connected to the twenty-second resistor, the twenty-third resistor, and the cathode of the twelfth diode, and the cathode is connected to a 5VDC power supply; one end of the twelfth diode is connected to the signal input terminal and the anode of the eleventh diode, and the other end is grounded.

5. The cockpit environment system control device according to claim 1, characterized in that: The air conditioner condenser driving circuit comprises: a first driver, a first field effect transistor, an eighth capacitor, a tenth capacitor, a twelfth capacitor, a thirteenth capacitor, an eighteenth resistor, a fourth diode, a sixth diode, and an eighth diode, wherein the first port of the first driver is connected to a 12VDC power supply, an eighth capacitor, and a fourth diode, the second port of the first driver is connected to an input signal terminal, the third port of the first driver and the fourth port of the first driver are grounded, the fifth port of the first driver is connected to a sixth diode, an eighth diode, an eighteenth resistor, a tenth capacitor, a source of the first field effect transistor, and a thirteenth capacitor, the sixth port of the first driver is connected to a gate of the first field effect transistor and a tenth capacitor and a sixth diode, the seventh port of the first driver is connected to a gate of the first field effect transistor and a tenth capacitor and a sixth diode, the eighth port of the first driver is connected to a sixth diode, a fourth diode, and a gate of the first field effect transistor, the first port of the second driver is connected to a 12VDC power supply, a ninth capacitor, and a fifth diode, the second port of the second driver is connected to an input signal terminal, the third port of the second driver and the fourth port of the second driver are grounded, the fifth port of the second driver is connected to a seventh diode, a ninth diode, a nineteenth resistor, an eleventh capacitor, a source of the second field effect transistor, and a fifteenth capacitor, The sixth port of the driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the seventh port of the second driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the eighth port of the second driver is connected to the seventh diode, the fifth diode and the gate of the second field effect transistor, the gate of the first field effect transistor is connected to the tenth capacitor, the sixth diode and the sixth port and the seventh port of the first driver, the source of the first field effect transistor is connected to the fifth port of the first driver, the drain of the first field effect transistor is connected to the twelfth capacitor and the signal output end, one end of the eighth capacitor is connected to the first port of the first driver and the other end is grounded, one end of the tenth capacitor is connected to the gate of the first field effect transistor and the other end is connected to the fifth port of the first driver, one end of the twelfth capacitor is connected to the drain of the first field effect transistor and the other end is grounded, one end of the thirteenth capacitor is connected to the source of the first field effect transistor and the other end is grounded, one end of the eighteenth resistor is connected to the fifth port of the first driver and the other end is grounded, the positive electrode of the fourth diode is connected to the first port of the first driver, and the negative electrode is connected to the eighth port of the first driver, one end of the sixth diode is connected to the eighth port of the first driver and the other end is connected to the fifth port of the first driver, and one end of the eighth diode is connected to the fifth port of the first driver and the other end is grounded.

6. The cockpit environment system control device according to claim 1, characterized in that: The air conditioner evaporator driving circuit comprises: The second driver, the second field effect transistor, the ninth capacitor, the eleventh capacitor, the fourteenth capacitor, the fifteenth capacitor, the nineteenth resistor, the fifth diode, the seventh diode, and the ninth diode, wherein the first port of the second driver is connected to the 12VDC power supply, the ninth capacitor and the fifth diode, the second port of the second driver is connected to the input signal terminal, the third port of the second driver and the fourth port of the second driver are grounded, the fifth port of the second driver is connected to the seventh diode, the ninth diode, the nineteenth resistor, the eleventh capacitor, the source of the second field effect transistor, and the fifteenth capacitor, the sixth port of the second driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the seventh port of the second driver is connected to the gate of the second field effect transistor and the eleventh capacitor and the seventh diode, the eighth port of the second driver is connected to the seventh diode, the fifth diode and the gate of the second field effect transistor, and the gate of the second field effect transistor is connected The eleventh capacitor, the seventh diode and the sixth port and the seventh port of the second driver are connected, the source of the second field effect transistor is connected to the fifth port of the second driver, the drain of the second field effect transistor is connected to the fourteenth capacitor and the signal output terminal, one end of the ninth capacitor is connected to the first port of the second driver, and the other end is grounded, one end of the eleventh capacitor is connected to the gate of the second field effect transistor, and the other end is connected to the fifth port of the second driver, one end of the fourteenth capacitor is connected to the drain of the second field effect transistor, and the other end is grounded, one end of the fifteenth capacitor is connected to the source of the second field effect transistor, and the other end is grounded, one end of the nineteenth resistor is connected to the fifth port of the second driver, and the other end is grounded, the positive electrode of the fifth diode is connected to the first port of the second driver, and the negative electrode is connected to the eighth port of the second driver, one end of the seventh diode is connected to the eighth port of the second driver, and one end is connected to the fifth port of the second driver, and one end of the ninth diode is connected to the fifth port of the second driver, and one end is grounded.

7. The cockpit environment system control device according to claim 1, characterized in that: The air conditioning compressor switch circuit comprises: A first photocoupler, a twentieth resistor, a twenty-first resistor, and a tenth diode, wherein the first input terminal of the first photocoupler is connected to the twentieth resistor, the second input terminal of the first photocoupler is grounded, the third output terminal of the first photocoupler and the fifth output terminal of the first photocoupler are connected to the CENTER_CONSOLE_PANEL_PWR signal output terminal, the fourth output terminal of the first photocoupler is connected to the twenty-first resistor, the tenth diode and the COMPRESSOR_REMOTE_ON / OFF signal output terminal, the twentieth resistor is connected to the first input terminal of the first photocoupler, one end of the twenty-first resistor is connected to the fourth output terminal of the first photocoupler, and one end is grounded, the positive electrode of the tenth diode is grounded, and the negative electrode is connected to the COMPRESSOR_REMOTE_ON / OFF signal output terminal.

8. The cockpit environment system control device according to claim 1, characterized in that: The fresh air valve control circuit comprises: A first operational amplifier, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a sixteenth capacitor, and a seventeenth capacitor, wherein the third port of the first operational amplifier is connected to the DAC signal input terminal, the fourth port of the first operational amplifier is connected to the twenty-fourth resistor and the twenty-sixth resistor, the fifth port of the first operational amplifier is connected to the 12VDC power supply, the second port is grounded, the first port is connected to the twenty-fifth resistor, one end of the twenty-fourth resistor is connected to the fourth interface of the first operational amplifier, and the other end is grounded, one end of the twenty-fifth resistor is connected to the first interface of the first operational amplifier, and one end is connected to the twenty-sixth resistor and the sixteenth capacitor, one end of the twenty-sixth resistor is connected to the fourth interface of the first operational amplifier, and one end is connected to the twenty-fifth resistor, one end of the twenty-seventh resistor is connected to the seventeenth capacitor and the twenty-eighth resistor, and one end is connected to the signal output terminal, one end of the twenty-eighth resistor is connected to the seventeenth capacitor and the twenty-seventh resistor, and one end is grounded, one end of the sixteenth capacitor is connected to the twenty-fifth resistor and the signal output terminal, and one end is grounded, and one end of the seventeenth capacitor is connected to the signal input terminal and the twenty-eighth resistor, and one end is grounded.

9. The cockpit environment system control device according to claim 1, characterized in that: The heating motor driving circuit comprises: The first heating motor driver, the twenty-ninth resistor, the eighteenth capacitor, the nineteenth capacitor, the twentieth capacitor, the twenty-first capacitor, the thirteenth diode, and the fourteenth diode, wherein the first port of the first heating motor driver is grounded, the second port of the first heating motor driver is connected to the MOTOR_DIR_B signal input terminal, the third port of the first heating motor driver is connected to the MOTOR_DIR_A signal input terminal, the fourth port of the first heating motor driver is connected to the MOTOR_FAULT signal input terminal, the fifth port of the first heating motor driver is connected to the eighteenth capacitor, the sixth port of the first heating motor driver is connected to the twenty-first capacitor, and the seventh port of the first heating motor driver is connected The twenty-ninth resistor and the eighth port of the first heating motor driver are connected to the twentieth capacitor, one end of the twenty-ninth resistor is connected to the seventh interface of the first heating motor driver, and the other end is grounded, one end of the eighteenth capacitor is connected to the fifth interface of the first heating motor driver, and the other end is grounded, one end of the nineteenth capacitor is connected to the fifth interface of the first heating motor driver, and the other end is grounded, one end of the 20th capacitor is connected to the eighth interface of the first heating motor driver, and the other end is grounded, one end of the twenty-first capacitor is connected to the sixth interface of the first heating motor driver, and the other end is grounded, the positive pole of the thirteenth diode is grounded, and the negative pole is connected to the eighth interface of the first heating motor driver, and the positive pole of the fourteenth diode is grounded, and the negative pole is connected to the sixth interface of the first heating motor driver.

10. The cockpit environment system control device according to claim 1, characterized in that: The air conditioning compressor speed control circuit includes: a 30th resistor, a 31st resistor, a 22nd capacitor, and a 15th diode, wherein one end of the 30th resistor is connected to a 5VDC power supply, and one end is connected to the 31st resistor and an AC_COMPRESSOR_SPEED_CTRL_OUT signal output end; one end of the 31st resistor is connected to the 30th resistor and the AC_COMPRESSOR_SPEED_CTRL_OUT signal output end, and one end is connected to the signal AC_COMP_SPEED input end; one end of the 22nd capacitor is connected to the 30th resistor and the 31st resistor, and one end is grounded; the anode of the 15th diode is grounded, and the cathode is connected to the AC_COMPRESSOR_SPEED_CTRL_OUT signal output end and the 22nd capacitor.

Images