Vehicle-mounted air conditioner control method

Abstract

The invention discloses a vehicle-mounted air conditioner control method which comprises the following active air speed reducing step: judging whether the following trigger conditions are met: received Bluetooth call information is in call, and the air cooling gear of an air conditioner is not less than N gear, and if yes, reducing the air speed of the air conditioner through an air conditioner controller. According to the vehicle-mounted air conditioner control method provided by the invention, the air conditioner is controlled to actively reduce the air volume when the driver calls, so that the air noise is reduced, the attention of the driver is prevented from being influenced, and the travel safety is improved.

Description

Technical Field

[0001] The invention relates to the field of vehicle air conditioning control, and in particular to a vehicle air conditioning control method. Background Art

[0002] With the improvement of living standards and weather conditions, people use car air conditioners more and more while driving. As cars become a common means of transportation, it is inevitable to face the scene of answering voice calls or videos through mobile phones. When driving on a high speed and the road conditions are complicated, the car air conditioner is also in use. At this time, a call suddenly comes in with a large air volume. The effect of answering the call will be poor, which will distract the driver and easily cause a traffic accident. Summary of the invention

[0003] The object of the present invention is to provide a vehicle air conditioning control method to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a vehicle air conditioning control method, comprising the following steps of actively reducing the wind speed:

[0005] Determine whether the following trigger conditions are met: the received Bluetooth call information is "call in progress", and the air conditioning cooling gear is not less than gear N. If so, the air conditioning wind speed is reduced through the air conditioning controller.

[0006] Preferably, the trigger condition also includes that the air conditioner is currently in a non-front defrost mode.

[0007] Preferably, when a voice call or a video call is connected to the mobile phone connected to the vehicle-mounted Bluetooth, or when the mobile phone connected to the vehicle-mounted Bluetooth actively initiates a voice call or a video, the Bluetooth call information is determined to be "in call".

[0008] Preferably, when it is determined whether any of the following conditions is met, the active wind speed reduction step is exited:

[0009] The air conditioning button that can change the air volume control of the air conditioner was operated;

[0010] When the air conditioner is in use, the air conditioner controller detects that the air volume gear position has changed;

[0011] The air conditioning controller receives the Bluetooth call message "Call ended".

[0012] Preferably, when the condition that the air conditioning controller receives the Bluetooth call information "call ended" is met, the air volume of the air conditioning returns to the air volume position before the wind speed is reduced.

[0013] Preferably, when the condition that the air conditioning controller receives the Bluetooth call information "call ended" is met, the air volume of the air conditioning returns to the air volume position before the wind speed is reduced.

[0014] Preferably, N gear is 4th gear.

[0015] Preferably, the air conditioning controller supports multi-channel CANFD and CAN communications, 1M FLASH space, 3-channel LIN communications, multi-channel SPI communications, 48-channel analog quantity acquisition, 48-channel PWM output control, LIN communication supports local wake-up, and the CAN communication circuit can realize remote wake-up.

[0016] Preferably, the blower control circuit of the air conditioner controller is controlled in PWM mode, and the PWM duty cycle is calibrated according to the opening threshold of the blower speed control module. The blower feedback circuit is closed-loop, so that when the vehicle voltage fluctuates, the control terminal voltage is automatically compensated and adjusted according to the blower terminal voltage;

[0017] The CAN drive circuit in the air conditioning controller controls the PTC (high temperature heater) and compressor components;

[0018] The LIN drive circuit in the air conditioning controller controls the water valve and electronic expansion valve components;

[0019] The main MCU in the air conditioning controller controls the blower and water pump through PWM;

[0020] The main MCU in the air conditioner controller controls the motors in each mode via SPI;

[0021] The main MCU in the air-conditioning controller collects and processes the data from each sensor through the AD acquisition interface;

[0022] The main MCU in the air-conditioning controller collects Bluetooth signals through CAN communication and controls the corresponding load to operate.

[0023] Preferably, when there is a demand for passenger compartment cooling, the air conditioning controller controls the compressor to start and the blower to start through CAN communication, and the heating and cooling motor, internal and external circulation motor, and mode motor to achieve passenger compartment cooling. The controller controls the compressor speed according to the evaporator target temperature and the current temperature difference; adjusts the blower wind speed according to the evaporator temperature to achieve cooling;

[0024] When the passenger compartment needs to be heated, the air conditioning controller controls the PTC power, water valve on / off, water pump speed or engine waste heat through CAN communication to achieve the passenger compartment heating function. According to the target demand temperature and the PTC outlet temperature difference, the PTC power is controlled. At this time, the heater water pump, stop valve, damper motor, internal and external circulation motor, and mode motor are controlled to be turned on to achieve passenger compartment heating;

[0025] When a mobile phone voice call or video is sent to the driver when the air conditioner is turned on, the air conditioner controller receives the Bluetooth signal through CAN communication, drives the blower to operate in PWM form and achieves the corresponding air volume;

[0026] When the driver actively makes a voice call or video call to a contact via the mobile phone, the air conditioning controller receives the Bluetooth signal through CAN communication, drives the blower in PWM form and achieves the corresponding air volume.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention provides a vehicle-mounted air-conditioning control method, which controls the air-conditioning to actively reduce the air volume when the driver is on a call, thereby reducing wind noise, avoiding affecting the driver's attention, and improving travel safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the working process of the present invention;

[0030] Figure 2 Schematic diagram of the hardware architecture of the air-conditioning controller of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Please refer to the figure, this embodiment provides a method for controlling a vehicle air conditioner, and the condition for the air conditioner to automatically reduce the wind speed when a Bluetooth mobile phone call or video is made (satisfied at the same time)

[0033] 1. Air conditioner is not in front defrost mode;

[0034] 2. The air volume of the air conditioner should not be less than 4 wind blocks;

[0035] 3. The air conditioner controller receives the Bluetooth call information as "call in progress";

[0036] 4. The Bluetooth call wind speed reduction function setting item is "On" (it is on by default under normal circumstances and can also be turned off manually).

[0037] Conditions for the air conditioner to automatically reduce the fan speed when exiting a Bluetooth phone call or video call (any one of the conditions will do)

[0038] 1. The air conditioning buttons that can change the air volume control of the air conditioner, such as the "defrost", air conditioning off and automatic mode buttons, are operated;

[0039] 2. When the air conditioner is in use, the air conditioner controller detects that the air volume gear has changed;

[0040] 3. The air conditioner controller receives the Bluetooth call message "Call ended". After exiting the Bluetooth call and reducing the wind speed, the air volume of the air conditioner returns to the wind volume setting before the wind speed reduction.

[0041] 4. The Bluetooth call wind speed reduction function setting item is turned off. To enable this function, you need to manually set it to be turned on.

[0042] Air conditioning controller hardware circuit Figure 2 As shown:

[0043] The main chip uses the S32K146HTOMLL main chip in the S32K144 series, which is a car-grade main chip with a maximum main frequency of 112M, supports multi-channel CANFD and CAN communications, 1M FLASH space, supports 3-channel LIN communication, supports multi-channel SPI communication, supports 48-channel analog quantity acquisition, supports 48-channel PWM output control, LIN communication supports local wake-up, and the CAN communication circuit can realize remote wake-up.

[0044] The blower circuit in the air conditioning controller uses the LM2904 chip, and the blower relay driver uses the NCV8402 chip, which has overvoltage, overcurrent, and overtemperature protection, and the drive rated current is 3A. The control method is PWM, and the PWM duty cycle is calibrated according to the blower speed control module opening threshold. The blower feedback circuit is closed-loop, and when the vehicle voltage fluctuates, the control terminal voltage is automatically compensated and adjusted according to the blower terminal voltage, and the anti-interference ability is strong.

[0045] The CAN drive circuit in the air conditioning controller controls the PTC (high temperature heater) and compressor components;

[0046] The LIN drive circuit in the air conditioning controller controls the water valve and electronic expansion valve components;

[0047] The main MCU in the air conditioning controller controls the blower and water pump through PWM;

[0048] The main MCU in the air conditioning controller controls each mode motor (internal and external circulation motor, heating and cooling motor, mode motor) through SPI

[0049] The main MCU in the air-conditioning controller collects and processes the data from each sensor through the AD acquisition interface;

[0050] The main MCU in the air conditioning controller collects Bluetooth signals through CAN communication and controls the corresponding load to operate.

[0051] The air conditioning controller functions are implemented as follows:

[0052] When there is a need to cool the passenger compartment, the air conditioning controller uses CAN communication to control the compressor to start and the blower to start, and the heating and cooling motor, internal and external circulation motor, and mode motor to achieve passenger compartment cooling. The controller controls the compressor speed according to the evaporator target temperature and the current temperature difference; and adjusts the blower wind speed according to the evaporator temperature to achieve cooling.

[0053] When the passenger compartment needs to be heated, the air conditioning controller controls the PTC (high temperature heater) power, water valve on / off, water pump speed or engine waste heat through CAN communication to achieve the passenger compartment heating function. According to the target demand temperature and the PTC outlet temperature difference, the PTC power is controlled. At this time, the heater water pump, stop valve, damper motor, internal and external circulation motor, and mode motor are controlled to be turned on to achieve passenger compartment heating.

[0054] When the air conditioner is turned on and a voice call or video is sent to the driver, the air conditioner controller receives the Bluetooth signal through CAN communication, drives the blower in PWM form and achieves the corresponding air volume.

[0055] When the driver actively makes a voice call or video call to a contact via the mobile phone, the air conditioning controller receives the Bluetooth signal through CAN communication, drives the blower in PWM form and achieves the corresponding air volume.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle air conditioning control method, characterized in that: The following steps are included to actively reduce wind speed: Determine whether the following trigger conditions are met: the received Bluetooth call information is "calling", and the air conditioning cooling gear is not less than N gear. If so, the air conditioning wind speed is reduced through the air conditioning controller.

2. A vehicle air conditioning control method according to claim 1, characterized in that: The triggering condition also includes that the air conditioner is currently in a non-front defrost mode.

3. A vehicle air conditioning control method according to claim 1, characterized in that: When a voice call or video call is connected to the mobile phone connected to the car's Bluetooth, or when the mobile phone connected to the car's Bluetooth actively initiates a voice call or video, the Bluetooth call information is judged as "in call".

4. A vehicle air conditioning control method according to claim 3, characterized in that: When any of the following conditions is met, exit the active wind speed reduction step: The air conditioning button that can change the air volume control of the air conditioner was operated; When the air conditioner is in use, the air conditioner controller detects that the air volume gear position has changed; The air conditioning controller receives the Bluetooth call message "Call ended".

5. A vehicle air conditioning control method according to claim 4, characterized in that: When the condition that the air conditioner controller receives the Bluetooth call information "call ended" is met, the air volume of the air conditioner returns to the air volume level before the wind speed was reduced.

6. A vehicle air conditioning control method according to claim 1, characterized in that: When entering the active wind speed reduction step, the air conditioning controller periodically sends the "start Bluetooth call to reduce wind speed" message, and the air conditioning controller periodically sends the "start Bluetooth call to reduce wind speed" message.

7. A vehicle air conditioning control method according to claim 1, characterized in that: N gear is 4th gear.

8. A vehicle air conditioning control method according to claim 1, characterized in that: The air conditioning controller supports multi-channel CAN FD and CAN communications, 1M FLASH space, 3-channel LIN communications, multi-channel SPI communications, 48-channel analog quantity acquisition, 48-channel PWM output control, LIN communication supports local wake-up, and CAN communication circuit can realize remote wake-up.

9. A vehicle air conditioning control method according to claim 8, characterized in that: The blower control circuit of the air conditioner controller uses PWM control mode. The PWM duty cycle is calibrated according to the blower speed control module opening threshold. The blower feedback circuit is closed-loop, so that when the vehicle voltage fluctuates, the control terminal voltage is automatically compensated and adjusted according to the blower terminal voltage; The CAN drive circuit in the air conditioning controller controls the PTC (high temperature heater) and compressor components; The LIN drive circuit in the air conditioning controller controls the water valve and electronic expansion valve components; The main MCU in the air conditioning controller controls the blower and water pump through PWM; The main MCU in the air conditioner controller controls the motors in each mode via SPI; The main MCU in the air-conditioning controller collects and processes the data from each sensor through the AD acquisition interface; The main MCU in the air-conditioning controller collects Bluetooth signals through CAN communication and controls the corresponding load to operate.

10. A vehicle air conditioning control method according to claim 9, characterized in that: When there is a need to cool the passenger compartment, the air conditioning controller uses CAN communication to control the compressor to start and the blower gear to start, and the heating and cooling motor, internal and external circulation motor, and mode motor to achieve passenger compartment cooling. The controller controls the compressor speed according to the difference between the evaporator target temperature and the current temperature; The blower speed is adjusted according to the evaporator temperature to achieve cooling; When the passenger compartment needs to be heated, the air conditioning controller controls the PTC power, water valve on / off, water pump speed or engine waste heat through CAN communication to achieve the passenger compartment heating function. According to the target demand temperature and the PTC outlet temperature difference, the PTC power is controlled. At this time, the heater water pump, stop valve, damper motor, internal and external circulation motor, and mode motor are controlled to be turned on to achieve passenger compartment heating; When a mobile phone voice call or video is sent to the driver when the air conditioner is turned on, the air conditioner controller receives the Bluetooth signal through CAN communication, drives the blower to operate in PWM form and achieves the corresponding air volume; When the driver actively makes a voice call or video call to a contact via the mobile phone, the air conditioning controller receives the Bluetooth signal through CAN communication, drives the blower in PWM form and achieves the corresponding air volume.

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