Automobile air conditioner automatic defogging method and system

Abstract

The present disclosure provides an automatic defogging method and system for automobile air conditioner, and relates to the technical field of automobile intelligence. The method comprises the following steps: the whole vehicle enters the automatic defogging precondition, and the power supply of the whole vehicle is in the ON state; the effective dew point, the front windshield temperature and the relative humidity signals in the vehicle are obtained, the automatic defogging switch is in the open state, and the current state is not in the defogging state mode, and the current state is memorized; the effective dew point, the front windshield temperature and the relative humidity signals are received, the difference between the received windshield temperature and the dew point value is judged, when the automatic defogging condition is reached, the inside-out circulation and the air outlet mode are controlled to be defrosting according to the difference, the front defrosting mode instruction is sent to the air conditioner, and the corresponding front defrosting mode is controlled to be executed. The present disclosure can automatically realize defogging and improve the intelligence of automobile driving.

Description

Technical Field

[0001] This disclosure relates to the field of automotive intelligent technology, specifically to an automatic defogging method and system for automotive air conditioning. Background Technology

[0002] The statements in this section are merely background information relating to this disclosure and do not necessarily constitute prior art.

[0003] With the advent of intelligent vehicles, people are paying more and more attention to driving safety, comfort, and convenience. The automatic defogging function of car air conditioning can prevent the safety hazards caused by fogging of the glass.

[0004] With the expansion of automotive air conditioning configurations and functions, some vehicles now have automatic defogging functions. Automatic defogging functions are receiving increasing attention because they can provide drivers with greater convenience and safety. Therefore, the energy efficiency, intelligence, and accuracy of automatic defogging control methods directly affect the thermal comfort of the passenger cabin and driving safety.

[0005] When a vehicle is in motion, under certain conditions—specifically, when the dew point temperature exceeds a certain threshold for windshield temperature—moisture in the air will condense onto the windshield, forming fog and affecting driving safety. Current automatic defogging control methods calculate the dew point temperature of the air inside the vehicle based on the interior temperature and relative humidity, and then compare this calculated dew point temperature with the windshield temperature. If the temperature difference between the windshield temperature and the dew point temperature is less than a preset value, the vehicle's air conditioning control unit controls the air conditioning system to defog the windshield for a predetermined duration. However, this timed defogging control method is not user-friendly and has limitations in terms of time frame, failing to automatically defog and thus compromising driving safety. Summary of the Invention

[0006] To address the aforementioned issues, this disclosure proposes an automatic defogging method and system for automotive air conditioning. It obtains the relative humidity, windshield temperature, and dew point temperature of the area near the windshield from the CAN bus, and executes an automatic defogging method based on the difference between the windshield temperature and the dew point temperature, thereby improving the intelligence and comfort of the vehicle.

[0007] According to some embodiments, the present disclosure adopts the following technical solutions:

[0008] An automatic defogging method for automotive air conditioning includes:

[0009] The vehicle enters the automatic defogging preconditions, and the vehicle power is ON.

[0010] Acquire valid dew point, windshield temperature, and relative humidity signals inside the vehicle, turn on the automatic defogger switch, and remember the current state if the vehicle is not in defogger mode.

[0011] It receives valid dew point, windshield temperature, and relative humidity signals, determines the difference between the received glass temperature and dew point value, and when the automatic defogging conditions are met, it controls the vehicle's internal and external air circulation and air outlet mode to defrost based on the difference. It then sends the front defrost mode command to the air conditioning system to control the execution of the corresponding front defrost mode.

[0012] Furthermore, when the difference between the glass temperature and the dew point value is greater than the safety constant for terminating the automatic defogging state, the automatic defogging condition is met, and automatic defogging begins.

[0013] Furthermore, the defogging modes include face blowing, face and feet blowing, feet blowing, and defrosting and feet blowing modes.

[0014] Furthermore, the air conditioning controller will adjust the internal and external circulation, the air outlet mode to defrost, the air volume, and whether the AC is turned on, based on the actual situation.

[0015] Furthermore, if the air conditioning system is in face blowing, face blowing and foot blowing, foot blowing, or defrost foot blowing mode, the air conditioner receives a request to set the defrost mode and adjusts the blowing mode according to the air volume.

[0016] Furthermore, when the airflow is less than or equal to level 5, after the controller enters the front defrost mode, the airflow defaults to level 5, the circulation mode defaults to external circulation, and the AC working indicator light is on; at the same time, it sends requests for internal and external circulation mode, blowing mode, airflow adjustment, and air conditioner display to the display screen and air conditioner panel, that is, displays internal and external circulation information, front defrost information, airflow information, and AC information on the display screen.

[0017] Furthermore, when the airflow is greater than level 5, after the controller enters the front defrost mode, the airflow remains at the previous level, the circulation mode defaults to external circulation, the air conditioner compressor starts working, and at the same time sends the internal / external circulation mode, front blowing mode, airflow adjustment, and compressor status to the display screen and air conditioner panel.

[0018] Furthermore, when there is a conflict between the signals sent by the air conditioner panel and the display screen, the setting value of the air conditioner panel takes priority.

[0019] According to some embodiments, the present disclosure adopts the following technical solutions:

[0020] An automatic defogging system for automotive air conditioning includes:

[0021] The data acquisition module acquires valid dew point, windshield temperature, and relative humidity signals inside the vehicle.

[0022] The controller receives valid dew point, windshield temperature, and relative humidity signals, determines the difference between the received glass temperature and dew point value, and when the automatic defogging conditions are met, controls the vehicle's internal and external air circulation and air outlet mode to defrost based on the difference. It also sends the front defrost mode command to the air conditioning system to control the execution of the corresponding front defrost mode.

[0023] The display screen is used to manually set adjustment values ​​and display current status data;

[0024] The air conditioner panel is used to display the current status of the air conditioner and to control it.

[0025] According to some embodiments, the present disclosure adopts the following technical solutions:

[0026] An electronic device includes a processor, a memory, and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device is running, the processor executes the computer program stored in the memory to enable the electronic device to perform an automatic defogging method for an automotive air conditioner.

[0027] Compared with the prior art, the beneficial effects of this disclosure are as follows:

[0028] This disclosure addresses the shortcomings of current automatic defogging control methods that rely on timed defogging, which lacks user-friendliness. It optimizes and innovates the control logic by acquiring relative humidity, windshield temperature, and dew point temperature near the windshield via the CAN bus. Based on the difference between the glass temperature and the dew point temperature, it executes the automatic defogging method, improving the vehicle's intelligence and comfort. The system allows for judgment of the automatic defogging status, enabling manual intervention to adjust the defogging time and control logic. Attached Figure Description

[0029] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0030] Figure 1 This is a flowchart of the defogging control logic of an embodiment of this disclosure. Detailed implementation method:

[0031] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Example 1

[0035] This disclosure provides a method for automatic defogging of automotive air conditioning, including:

[0036] Step 1: The vehicle enters the automatic defrosting preconditions, and the vehicle power is ON;

[0037] Step 2: Obtain valid dew point, windshield temperature, and relative humidity signals inside the vehicle, turn on the automatic defogger switch, and ensure that the vehicle is not currently in defogger mode; remember the current state.

[0038] Step 3: Receive valid dew point, windshield temperature, and relative humidity signals, determine the difference between the received glass temperature and dew point value, and when the automatic defogging conditions are met, control the vehicle's internal and external air circulation and air outlet mode to defrost based on the difference, and send the front defrost mode command to the air conditioning system to control the execution of the corresponding front defrost mode.

[0039] Specifically, as one example, such as Figure 1 As shown, the control process for automatic defogging is as follows:

[0040] When the air conditioner is in the ON position, it checks whether the defogging conditions are met. If the conditions are met, it automatically turns on the defogging function, the front defrost light illuminates, and it enters the defogging mode.

[0041] Determine if the defogging process is complete. If so, turn off the air conditioner and put it in the OFF state.

[0042] If the defogging process is not finished, manually intervene by pressing the pre-defrost, ACMAX, automatic defogging enable switch, and AUTO button to speed up the defogging process. The automatic defogging switch will then be turned off.

[0043] Alternatively, you can use the ON / OFF button to automatically turn the air conditioner's defogging function on or off.

[0044] Alternatively, you can operate the AC to adjust the temperature, the fan speed, or the internal / external circulation, and then determine whether the automatic defogging has ended by pressing the air conditioner ON / OFF button.

[0045] Specifically, the automatic defrost switch command for the whole vehicle is determined to be turned on → the air conditioner is turned on → the defrost conditions are determined to be met → if met, the defrost function is turned on automatically; if not met, the air conditioner remains on → if the defrost is cleared, the defrost is cleared; if cleared, the air conditioner remains on if no operation is performed / or the air conditioner is turned off to the OFF state.

[0046] The automatic defogger switch command is executed as follows: → the air conditioner is turned on → the defogger conditions are met → the defogger function is automatically activated → the defogger is completely defogging. If an abnormal power failure occurs during the process, the system will be re-energized → the defogger conditions will be re-evaluated → the defogger function will be automatically activated → the defogger is completely defogging. If the defogger is completely defogging, the air conditioner will remain on (ON) if no further action is taken, or the air conditioner will be turned off (OFF).

[0047] As one embodiment, the method for determining whether to enter the defogging state is:

[0048] When the difference between the glass temperature and the dew point value is greater than the safety constant for terminating the automatic defogging state, the automatic defogging condition is met, and automatic defogging begins.

[0049] That is, (Tws-Td)>ΔP,

[0050] ΔP is the safety constant for disabling automatic defrosting (based on actual vehicle calibration).

[0051] The defogging modes include face blowing, foot blowing, face and foot blowing, and defrost and foot blowing modes.

[0052] When the automatic defogging conditions are met, the air conditioner controller will control the internal and external circulation according to the time, set the air outlet mode to defrost, adjust the air volume, and determine whether to turn on the AC.

[0053] If the air conditioning system is in face blowing, face blowing and foot blowing, foot blowing, or defrost foot blowing mode, the air conditioner receives a request to set the defrost mode and adjusts the blowing mode according to the air volume.

[0054] If the air conditioning system is in other modes such as face blowing, face-to-feet blowing, feet blowing, or defrost-to-feet blowing (not front defrost), after receiving the front defrost mode setting request email from the FCP / SCCU:

[0055] 1. When the airflow is ≤5, after the controller enters the pre-defrost mode, the airflow defaults to level 5, the circulation mode defaults to external circulation, and the AC working indicator light illuminates. Simultaneously, it sends requests for internal / external circulation mode, blowing mode, airflow adjustment, and air conditioning display to the SCCU and FCP, i.e., displaying internal / external circulation information, pre-defrost information, airflow information, and AC information on the display screen.

[0056] 2. When the air volume is greater than 5, after the controller enters the front defrost mode, the air volume remains at the previous level, the circulation mode defaults to external circulation, the air conditioner compressor starts to work, and at the same time sends the internal and external circulation mode, front blowing mode, air volume adjustment, and compressor status to the SCCU and FCP.

[0057] 3. When there is a conflict between the signals sent by the air conditioner panel and the display screen, the setting value of the air conditioner panel shall take priority.

[0058] FCP stands for air conditioning panel; SCCU stands for instrument panel.

[0059] Example 2

[0060] This disclosure provides an automatic defogging system for automotive air conditioning, including:

[0061] The data acquisition module acquires valid dew point, windshield temperature, and relative humidity signals inside the vehicle.

[0062] The controller receives valid dew point, windshield temperature, and relative humidity signals, determines the difference between the received glass temperature and dew point value, and when the automatic defogging conditions are met, controls the vehicle's internal and external air circulation and air outlet mode to defrost based on the difference. It also sends the front defrost mode command to the air conditioning system to control the execution of the corresponding front defrost mode.

[0063] The display screen is used to manually set adjustment values ​​and display current status data;

[0064] The air conditioner panel is used to display the current status of the air conditioner and to control it.

[0065] The controller refers to the air conditioner controller, which is a module that receives and processes signals; the air conditioner panel is the actuator that controls the air conditioner function and receives / releases feedback signals to the air conditioner controller.

[0066] Example 3

[0067] One embodiment of this disclosure provides an electronic device, including: a processor, a memory, and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device is running, the processor executes the computer program stored in the memory to enable the electronic device to perform an automatic defogging method for an automotive air conditioner as described in any one of claims 1-7.

[0068] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0069] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0070] While the specific embodiments of this disclosure have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this disclosure. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this disclosure are still within the scope of protection of this disclosure.

Claims

1. A method for automatic defogging of an automotive air conditioner, characterized in that, include: The vehicle enters the automatic defogging preconditions, and the vehicle power is ON. The system acquires valid dew point, windshield temperature, and relative humidity signals from inside the vehicle. It sets the automatic defrost switch to the "on" position, ensuring the vehicle is not currently in defrost mode, and memorizes this current state. Upon receiving these signals, it determines the difference between the received glass temperature and the dew point value. When the automatic defrost condition is met, it controls the vehicle's internal / external air circulation and ventilation mode to defrost based on the difference, sending a front defrost mode command to the air conditioning system to execute the corresponding front defrost mode. When the difference between the glass temperature and the dew point value exceeds a safety constant for deactivating the automatic defrost mode, the automatic defrost condition is met, and automatic defrosting begins; that is, (Tws-Td)>ΔP, where Tws is the glass temperature, Td is the dew point value, and ΔP is the safety constant for deactivating the automatic defrost mode, ΔP being calibrated based on the actual vehicle. When the airflow is less than or equal to level 5, after the controller enters the front defrost mode, the airflow defaults to level 5, the circulation mode defaults to external circulation, and the AC working indicator light illuminates. At the same time, it sends requests for internal / external circulation mode, blowing mode, airflow adjustment, and air conditioner display to the display screen and air conditioner panel, that is, it displays internal / external circulation information, front defrost information, airflow information, and AC information on the display screen. When the airflow is greater than level 5, after the controller enters the front defrost mode, the airflow remains at the previous level, the circulation mode defaults to external circulation, the air conditioner compressor starts working, and at the same time, it sends requests for internal / external circulation mode, front blowing mode, airflow adjustment, and compressor status to the display screen and air conditioner panel.

2. The automatic defogging method for automotive air conditioning as described in claim 1, characterized in that, The defogging modes include face blowing, face and feet blowing, feet blowing, and defrosting and feet blowing modes.

3. The automatic defogging method for automotive air conditioning as described in claim 1, characterized in that, When the automatic defogging conditions are met, the air conditioning controller will control the internal and external circulation, the air outlet mode to defrost, adjust the air volume, and whether to turn on the AC according to the actual situation.

4. The automatic defogging method for automotive air conditioning as described in claim 1, characterized in that, If the air conditioning system is in face blowing, face blowing and foot blowing, foot blowing, or defrost foot blowing mode, the air conditioner receives a request to set the defrost mode and adjusts the blowing mode according to the air volume.

5. The automatic defogging method for automotive air conditioning as described in claim 1, characterized in that, When there is a conflict between the signals sent by the air conditioner panel and the display screen, the setting value of the air conditioner panel takes priority.

6. An automatic defogging system for automotive air conditioning, comprising: The data acquisition module acquires valid dew point, windshield temperature, and relative humidity signals inside the vehicle. The controller receives valid dew point, windshield temperature, and relative humidity signals, determines the difference between the received glass temperature and dew point value, and when the automatic defogging conditions are met, controls the vehicle's internal and external air circulation and air outlet mode to defrost based on the difference. It also sends the front defrost mode command to the air conditioning system to control the execution of the corresponding front defrost mode. The display screen is used to manually set adjustment values ​​and display current status data; The air conditioner panel is used to display the current status of the air conditioner and to control it.

7. An electronic device, characterized in that, include: The device includes a processor, a memory, and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device is running, the processor executes the computer program stored in the memory to enable the electronic device to perform an automatic defogging method for an automotive air conditioner as described in any one of claims 1-4.

Images