Method for controlling carbon dioxide concentration in a vehicle and vehicle control system

Abstract

This application discloses a method for controlling carbon dioxide concentration in a vehicle and a vehicle control system. The method includes: acquiring carbon dioxide concentration values ​​of a target vehicle using multiple sensors, wherein the target vehicle is equipped with a carbon dioxide heat pump system for temperature regulation, and the carbon dioxide concentration values ​​are determined based on the carbon dioxide concentration in the air conditioning unit and the passenger compartment; comparing the carbon dioxide concentration values ​​with preset concentration values ​​to obtain a comparison result; generating a control command when the comparison result indicates a carbon dioxide refrigerant leak in the carbon dioxide heat pump system; and controlling a ventilation actuator in the target vehicle to perform ventilation operations based on the control command. This application solves the technical problem of related technologies relying solely on carbon dioxide concentration detection within the air conditioning system, leading to low response efficiency and increased safety hazards.

Description

Technical Field

[0001] This application relates to the field of data processing technology, and more specifically, to a method for controlling the carbon dioxide concentration of a vehicle and a vehicle control system. Background Technology

[0002] Electric vehicles using PTC (Positive Temperature Coefficient) heating in cold environments will consume a large amount of battery energy, resulting in a sharp reduction in driving range. Although ordinary heat pumps are more energy-efficient than PTC heating, their heating capacity is greatly reduced in extremely cold regions, and they may even fail to start, still requiring auxiliary electric heating. Against this backdrop, carbon dioxide heat pump technology has emerged. Carbon dioxide heat pumps utilize supercritical cycle characteristics to maintain efficient heating in low-temperature environments. Their energy efficiency ratio far exceeds that of traditional heat pumps and resistance heating, which can significantly reduce the reduction in driving range in winter.

[0003] However, for leak detection of carbon dioxide heat pump systems in electric vehicles, the relevant technologies rely solely on detecting the carbon dioxide concentration within the air conditioning system, resulting in low detection efficiency. Since carbon dioxide is colorless and odorless, it is difficult for occupants to detect in the early stages. As the concentration gradually increases, it can cause dizziness, chest tightness, and difficulty concentrating. In severe cases, it can even lead to hypoxia, suffocation, or loss of consciousness, increasing safety hazards.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This application provides a method for controlling vehicle carbon dioxide concentration and a vehicle control system, which at least solves the technical problem that related technologies rely solely on the detection of carbon dioxide concentration in the air conditioning system, resulting in low response efficiency and increased safety hazards.

[0006] According to one aspect of the embodiments of this application, a method for controlling the carbon dioxide concentration of a vehicle is provided, comprising: acquiring the carbon dioxide concentration value of a target vehicle through multiple sensors, wherein the target vehicle is equipped with a carbon dioxide heat pump system for regulating temperature, and the carbon dioxide concentration value is determined based on the carbon dioxide concentration in the air conditioning unit and the cabin of the target vehicle; comparing the carbon dioxide concentration value with a preset concentration value to obtain a comparison result; generating a control command when the comparison result indicates that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system; and controlling a ventilation actuator in the target vehicle to perform ventilation operation based on the control command.

[0007] In some embodiments of this application, the preset concentration value includes a first preset concentration value and a second preset concentration value, wherein the first preset concentration value is less than the second preset concentration value; comparing the carbon dioxide concentration value with the preset concentration value to obtain a comparison result includes: comparing the carbon dioxide concentration value with the first preset concentration value and the second preset concentration value respectively; obtaining a first comparison result when the carbon dioxide concentration value is greater than the first preset concentration value but not greater than the second preset concentration value; obtaining a second comparison result when the carbon dioxide concentration value is greater than the second preset concentration value, wherein the second comparison result is used to indicate that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system.

[0008] In some embodiments of this application, after obtaining the first comparison result, the method further includes: controlling the target vehicle to simultaneously open the external air intake channel and the internal air circulation channel; collecting the updated carbon dioxide concentration value of the target vehicle after a preset time period, and comparing the updated carbon dioxide concentration value with the first preset concentration value to obtain a third comparison result; and updating the control parameters corresponding to the external air intake channel when the third comparison result indicates that the updated carbon dioxide concentration value is greater than the first preset concentration value, wherein the control parameters are used to control the air intake ratio and air intake speed of the external air intake channel.

[0009] In some embodiments of this application, updating the control parameters corresponding to the external air intake channel includes: increasing the air intake ratio of the external air intake channel according to a first preset ratio to obtain a target air intake ratio, wherein the air intake ratio is used to control the proportion of outside air in the air conditioning intake system of the target vehicle to the total air intake volume; controlling the target vehicle to ventilate based on the target air intake ratio, and determining whether to continue updating the target air intake ratio according to the first preset ratio or stop operation after each preset time period; updating the air intake speed of the external air intake channel when the target air intake ratio is greater than a first target value and the actual carbon dioxide concentration value in the target vehicle is greater than a first preset concentration value.

[0010] In some embodiments of this application, updating the air intake speed of the external air intake channel includes: increasing the air intake speed of the external air intake channel according to a second preset ratio to obtain a target air intake speed, wherein the air intake speed is used to control the rotational speed of the air conditioning blower of the target vehicle; controlling the target vehicle to ventilate based on the target air intake speed, and determining whether to continue updating the target air intake speed according to the second preset ratio or stop operation after each preset time period; if the target air intake speed is greater than a second target value and the actual carbon dioxide concentration value in the target vehicle is greater than a first preset concentration value, continuing to increase the air intake ratio according to the first preset ratio until a third target value is reached, wherein the third target value is greater than the first target value.

[0011] In some embodiments of this application, the method further includes: when the air intake ratio is a third target value and the actual carbon dioxide concentration in the target vehicle is greater than a first preset concentration value, the air intake speed is further increased according to a second preset ratio until a fourth target value is reached, wherein the fourth target value is greater than the second target value.

[0012] In some embodiments of this application, the ventilation actuator includes multiple sub-actuators, and control commands are used to control at least one of the following sub-actuators: door controller, sunroof controller, infotainment controller, and vent fan, wherein the infotainment controller is used to send leakage alert information.

[0013] In some embodiments of this application, the method further includes: when the power supply of the target vehicle is cut off, acquiring the target carbon dioxide concentration value collected by the target sensor, wherein the target sensor is a sensor among a plurality of sensors connected to the backup power supply of the target vehicle; comparing the target carbon dioxide concentration value with a third preset concentration value to obtain a fourth comparison result; and when the fourth comparison result indicates that the target carbon dioxide concentration value is greater than the third preset concentration value, controlling the target ventilation actuator connected to the backup power supply to perform ventilation operation.

[0014] In some embodiments of this application, the method further includes: obtaining the operating conditions of the target vehicle; and, if the operating conditions indicate that a fire has occurred in the target area of ​​the target vehicle, controlling the carbon dioxide heat pump system to inject carbon dioxide refrigerant into the target area.

[0015] In some embodiments of this application, a valve device is provided in the target area, wherein the valve device includes a first port, a second port and a third port. The first port and the second port are connected in series and connected to the high-pressure refrigerant circulation pipeline of the carbon dioxide heat pump system. In the event of a fire, the third port is connected to the first port to inject carbon dioxide refrigerant into the target area.

[0016] According to another aspect of the embodiments of this application, a vehicle control system is also provided, including a target vehicle, multiple sensors, and a controller. The multiple sensors are disposed in the target vehicle and connected to the controller for collecting carbon dioxide concentration values ​​inside the target vehicle. The carbon dioxide concentration values ​​are determined based on the carbon dioxide concentration in the air conditioning unit and the passenger compartment of the target vehicle. The controller is connected to the controller and is used to compare the carbon dioxide concentration values ​​with preset concentration values ​​to obtain a comparison result. If the comparison result indicates that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system, a control command is generated, and the ventilation actuator inside the target vehicle is controlled to perform ventilation operation based on the control command.

[0017] In some embodiments of this application, the multiple sensors include: a first sensor disposed in the air conditioning unit of the target vehicle, a second sensor disposed in the front of the cabin of the target vehicle, and a third sensor disposed in the rear of the cabin of the target vehicle, wherein the third sensor is connected to the controller.

[0018] In some embodiments of this application, a backup power supply and a vent fan are also included. The backup power supply is connected to the controller and is used to supply power to the controller when the power supply to the target vehicle is cut off and there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system. The vent fan is connected to the controller and is used to perform ventilation operation based on the controller's control signal.

[0019] According to another aspect of the embodiments of this application, a vehicle carbon dioxide concentration control device is also provided, comprising: a data acquisition module for acquiring carbon dioxide concentration values ​​of a target vehicle through multiple sensors, wherein the target vehicle is equipped with a carbon dioxide heat pump system for regulating temperature, and the carbon dioxide concentration values ​​are determined based on the carbon dioxide concentration in the air conditioning unit and the cabin of the target vehicle; a comparison module for comparing the carbon dioxide concentration values ​​with preset concentration values ​​to obtain a comparison result; a determination module for generating a control command when the comparison result indicates that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system; and an execution module for controlling the ventilation actuator in the target vehicle to perform ventilation operations based on the control command.

[0020] According to another aspect of the embodiments of this application, a vehicle is also provided, including a vehicle control system, which is used to execute the control method for achieving the above-described vehicle carbon dioxide concentration.

[0021] According to another aspect of the embodiments of this application, an electronic device is also provided, including: a memory and a processor, wherein the memory is used to store program instructions; the processor is connected to the memory and is used to execute the above-described method for controlling the carbon dioxide concentration of a vehicle.

[0022] According to another aspect of the embodiments of this application, a non-volatile storage medium is also provided, the non-volatile storage medium including a stored computer program, wherein the device containing the non-volatile storage medium executes the above-described method for controlling the carbon dioxide concentration of a vehicle by running the computer program.

[0023] According to another aspect of the embodiments of this application, a computer program product is also provided, including computer instructions that, when executed by a processor, implement the above-described method for controlling the carbon dioxide concentration of a vehicle.

[0024] In this embodiment, a multi-point carbon dioxide concentration sensing method is adopted. By deploying sensors in multiple areas of the target vehicle to collect carbon dioxide concentration values, comparing them with a preset safety threshold, and automatically generating a ventilation control command when a refrigerant leak is detected, the vehicle's ventilation actuator is driven to start the air exchange operation. This achieves the purpose of real-time, all-area monitoring of leak risks, thereby realizing the technical effect of rapid and reliable leak response. It also solves the technical problem that related technologies rely solely on the detection of carbon dioxide concentration within the air conditioning system, resulting in low response efficiency and increased safety hazards. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0026] Figure 1 This is a hardware structure block diagram of a computer terminal for a vehicle carbon dioxide concentration control method according to an embodiment of this application.

[0027] Figure 2 This is a flowchart of a method for controlling vehicle carbon dioxide concentration according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the vehicle layout according to an embodiment of the present application of a method for controlling the carbon dioxide concentration of a vehicle.

[0029] Figure 4 This is a schematic diagram of the air conditioning system of a vehicle carbon dioxide concentration control method according to an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the control principle of a vehicle carbon dioxide concentration control method according to an embodiment of this application;

[0031] Figure 6 This is an overall control flowchart of a vehicle carbon dioxide concentration control method according to an embodiment of this application;

[0032] Figure 7 This is a flowchart of an air purification mode for a vehicle carbon dioxide concentration control method according to an embodiment of this application;

[0033] Figure 8 This is a flowchart illustrating the leakage mode of a vehicle carbon dioxide concentration control method according to an embodiment of this application;

[0034] Figure 9 This is a schematic diagram of a vehicle carbon dioxide concentration control device according to an embodiment of this application. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] To better understand the embodiments of this application, the technical terms involved in the embodiments of this application are explained below:

[0038] Ventilation Actuation Mechanism: This refers to the physical devices in a vehicle used to regulate airflow, including window lift mechanisms, sunroof opening mechanisms, air conditioning internal and external circulation dampers, and vent fans. In this embodiment, the mechanism is activated by an MCU command after a CO2 leak is detected, enabling rapid air exchange in the cabin.

[0039] T-BOX (Telematics Box): An in-vehicle remote communication terminal capable of wireless data interaction with cloud servers and mobile apps. In this embodiment, the T-BOX automatically sends a distress signal to the car service desk upon detecting a CO2 leak, enabling remote alarm and emergency response.

[0040] Ventilation Outlet Fan: An independent exhaust fan installed at the rear vent of the vehicle to actively accelerate the exhaust of air from the cabin. In this embodiment, the fan is directly driven by the CO2 monitoring controller and can still operate using backup power even when the vehicle is powered off.

[0041] A three-way solenoid valve is an electromagnetically driven valve that can switch fluid pathways via electrical signals and has three interface ports. In this embodiment, two ports of the valve are connected to a high-pressure CO2 pipeline, and one port is connected to the forward engine compartment. It is used to release CO2 to form an inert gas layer in the event of a fire, thereby achieving fire extinguishing.

[0042] With the rapid development of the automotive industry, electric vehicle sales have increased rapidly. However, the reduced driving range in winter and high heating energy consumption are the biggest problems hindering the further promotion of electric vehicles. Carbon dioxide heat pump technology has emerged to address this issue. However, carbon dioxide heat pump systems operate under high pressure and are prone to leakage. Their system pressure is many times higher than that of traditional refrigerants, placing extremely high demands on the reliability of pipelines, valves, and sealing systems. In the event of a collision, component aging, or installation defects, high-pressure carbon dioxide can rapidly leak into the relatively enclosed cabin space. Because carbon dioxide is colorless and odorless, occupants may not detect it initially. As the concentration gradually increases, it can cause dizziness, chest tightness, and difficulty concentrating. In severe cases, it can even lead to hypoxia, suffocation, or loss of consciousness. This hidden leakage poses a significant safety hazard when the vehicle is traveling at high speed and lacks ventilation.

[0043] To address the aforementioned technical problems, this application provides corresponding solutions, which are detailed below.

[0044] The vehicle carbon dioxide concentration control method embodiments provided in this application can be executed on a mobile terminal, computer terminal or similar computing device. Figure 1 A hardware block diagram of a computer terminal for implementing a method to control the carbon dioxide concentration of a vehicle is shown. Figure 1 As shown, the computer terminal 10 may include one or more processors (shown as 102a, 102b, ..., 102n in the figure) (the processor may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 104 for storing data, and a transmission module 106 for communication functions connected via wired and / or wireless networks. In addition, it may also include: a display, a keyboard, a cursor control device, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, and a BUS bus. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, computer terminal 10 may also include... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0045] It should be noted that the aforementioned one or more processors and / or other data processing circuits are generally referred to herein as "data processing circuits". These data processing circuits may be embodied, in whole or in part, in software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuits may be a single, independent processing module, or may be integrated, in whole or in part, into any other element within the computer terminal 10. As involved in the embodiments of this application, the data processing circuits serve as a processor control mechanism (e.g., selection of a variable resistor termination path connected to an interface).

[0046] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the vehicle carbon dioxide concentration control method in this embodiment. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, thereby realizing the aforementioned vehicle carbon dioxide concentration control method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor, and these remote memories can be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0047] The transmission module 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of the computer terminal 10. In one example, the transmission module 106 includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission module 106 may be a radio frequency (RF) module, used for wireless communication with the Internet.

[0048] The display can be, for example, a touchscreen liquid crystal display (LCD) that allows the user to interact with the user interface of the computer terminal 10.

[0049] It should be noted here that, in some optional embodiments, the above... Figure 1 The computer terminal shown may include hardware elements (including circuitry), software elements (including computer code stored on a computer-readable medium), or a combination of both hardware and software elements. It should be noted that... Figure 1 This is only one instance of a specific particular instance, and is intended to illustrate the types of components that may exist in the aforementioned computer terminal.

[0050] Under the above operating environment, this application provides an embodiment of a method for controlling the carbon dioxide concentration of a vehicle. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0051] Figure 2 This is a flowchart of a method for controlling vehicle carbon dioxide concentration according to an embodiment of this application, such as... Figure 2 As shown, the method includes the following steps:

[0052] Step S202: Collect carbon dioxide concentration values ​​of the target vehicle through multiple sensors. The target vehicle is equipped with a carbon dioxide heat pump system for regulating temperature. The carbon dioxide concentration values ​​are determined based on the carbon dioxide concentration in the air conditioning unit and the cabin of the target vehicle.

[0053] In step S202 above, multiple sensors refer to physical sensing devices installed in different spatial areas of the vehicle, specifically designed to detect carbon dioxide gas concentration. Their working principle is based on infrared absorption spectroscopy or electrochemical sensing mechanisms, capable of converting the concentration of carbon dioxide molecules in the air into a recognizable electrical signal. In some embodiments of this application, sensors are respectively arranged inside the air conditioning unit, at the front and rear of the cabin, forming a three-dimensional concentration sensing network. For example, sensors arranged inside the air conditioning unit are used to detect changes in the concentration of refrigerant at potential sources of leakage in the heat pump system, while sensors arranged at the front and rear of the cabin are used to monitor the actual exposure concentration within the passenger compartment.

[0054] A carbon dioxide heat pump system is a thermal management system that uses carbon dioxide as a refrigerant and operates in a supercritical cycle. The air conditioning unit is the core shell structure of the vehicle's air conditioning system, integrating components such as the evaporator, heating element, air ducts, and fan; it serves as the physical channel for air circulation and temperature regulation. In some embodiments of this application, this location is selected as the first monitoring point because it is adjacent to the high-pressure pipeline interface of the carbon dioxide heat pump system; if a refrigerant leak occurs, this area will be the first to show abnormal concentrations. The carbon dioxide concentration in the cabin refers to the volume percentage of carbon dioxide gas in the air within the enclosed space occupied by the occupants, and its changes directly reflect the health risks to the occupants. In some embodiments of this application, concentration gradient analysis is achieved through dual-point monitoring at the front and rear, avoiding misjudgments caused by local airflow disturbances.

[0055] In some embodiments of this application, the carbon dioxide concentration value of the target vehicle may refer to the carbon dioxide concentration value of the air conditioning unit, the carbon dioxide concentration value of the cabin, or the carbon dioxide concentration value determined based on the carbon dioxide concentrations of both the air conditioning unit and the cabin.

[0056] Step S204: Compare the carbon dioxide concentration value with the preset concentration value to obtain the comparison result.

[0057] In step S204 above, the preset concentration value refers to multiple concentration threshold nodes that are pre-fixed or calibrated within the CO2 monitoring controller to meet different safety levels and operating conditions. In some embodiments of this application, the preset concentration value can be designed as a multi-level differentiated threshold system: for example, 0.07% (700ppm) is used as the "air freshening start threshold" to trigger regular external circulation ventilation; 0.10% is used as the "preliminary leak confirmation threshold" to predict system anomalies; and 0.15% is used as the "emergency leak response threshold" to trigger system-wide linkage protection. These thresholds are not fixed but dynamically correlated with the vehicle's operating status (such as whether there are people, whether there is a power outage, or whether there is a collision).

[0058] In some embodiments of this application, under normal vehicle operation or when the vehicle is parked and powered down but no collision has occurred, the system employs a layered, progressive threshold comparison mechanism. For example, if the carbon dioxide concentration at any location in the air conditioning unit or cabin continuously exceeds 0.07% for more than one minute, the controller determines that the cabin air quality has deteriorated and generates an "air freshening mode activation" command, triggering the air conditioning system to activate external circulation and moderately adjust the fan speed. This process does not trigger alarms or forced ventilation; it only optimizes the ventilation strategy and is a comfort and preventative intervention. If the concentration further increases to 0.10% and persists for 30 seconds, the system determines that there is a "potential leakage risk," enters a standby enhanced monitoring state, increases the sensor sampling frequency, and prompts the occupants to "open the windows for ventilation," reserving reaction time for subsequent emergency responses.

[0059] In some embodiments of this application, the preset concentration value includes a first preset concentration value and a second preset concentration value, wherein the first preset concentration value is less than the second preset concentration value. Based on this, a comparison result can be determined through the following steps: comparing the carbon dioxide concentration value with the first preset concentration value and the second preset concentration value respectively; obtaining a first comparison result when the carbon dioxide concentration value is greater than the first preset concentration value but not greater than the second preset concentration value; obtaining a second comparison result when the carbon dioxide concentration value is greater than the second preset concentration value, wherein the second comparison result is used to indicate that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system.

[0060] It should be noted that the first preset concentration value refers to the trigger threshold set at a low concentration level, and its value is determined based on the human body's physiological sensitivity to carbon dioxide and indoor air quality standards, such as 0.07% (700 ppm). The second preset concentration value refers to the danger judgment threshold set at a higher concentration level, and its value is determined based on the acute toxicological effects of carbon dioxide on the human body and the asphyxiation risk boundary, such as 0.15% (1500 ppm) or higher.

[0061] Specifically, when the vehicle is in normal driving or stationary without collision, the CO2 monitoring controller collects concentration data from multiple sensors in the air conditioning unit and cabin at fixed intervals (e.g., once per second), and compares this data with a first preset concentration value and a second preset concentration value in parallel. It should be noted that the first preset concentration value is primarily used to detect whether the cabin air quality has deviated from a comfortable range, so the CO2 concentration value in the cabin can be used for comparison. The second preset concentration value is used to detect whether there is a refrigerant leak, so the CO2 concentration values ​​in both the air conditioning unit and the cabin can be compared simultaneously.

[0062] For example, if the current concentration in the cabin is 0.09%, exceeding 0.07% but not reaching 0.15%, a first comparison result is generated, and the system activates "Air Freshening Mode": the air conditioning system turns on external circulation, and the fan speed gradually increases according to a preset ratio (e.g., 5% per minute) until the concentration drops below 0.07%. If the current carbon dioxide concentration in both the air conditioning unit and the cabin exceeds 0.15%, or if the carbon dioxide concentration in either the air conditioning unit or the cabin exceeds 0.15%, a second comparison result is generated, and "Leakage Mode" is activated.

[0063] After obtaining the first comparison result, the following steps can be performed: control the target vehicle to simultaneously open the external air intake channel and the internal air circulation channel; collect the updated carbon dioxide concentration value of the target vehicle after a preset time period, and compare the updated carbon dioxide concentration value with the first preset concentration value to obtain the third comparison result; if the third comparison result indicates that the updated carbon dioxide concentration value is greater than the first preset concentration value, update the control parameters corresponding to the external air intake channel, wherein the control parameters are used to control the air intake ratio and air intake speed of the external air intake channel.

[0064] It should be noted that updating the carbon dioxide concentration value refers to the carbon dioxide concentration data that is re-collected by the sensor and filtered after a preset period of time following the implementation of ventilation intervention measures (i.e., simultaneously opening external air intake and internal recirculation). The control parameters of the external air intake channel refer to the set of instructions used to adjust the opening of the external recirculation damper and the blower speed in the vehicle's air conditioning system, including but not limited to the following dimensions: air intake ratio (i.e., the percentage of external fresh air to the total air intake) and air intake speed (i.e., the blower operating speed or air volume output level).

[0065] The above embodiment includes three consecutive actions: ① controlling the target vehicle to simultaneously open the external air intake channel and the internal air circulation channel; ② collecting the updated carbon dioxide concentration value after a preset time period and comparing it with the first preset concentration value; ③ updating the control parameters when the concentration does not meet the standard.

[0066] In some embodiments of this application, the control parameters corresponding to the external air intake channel can be updated in the following ways: increasing the air intake ratio of the external air intake channel according to a first preset ratio to obtain a target air intake ratio, wherein the air intake ratio is used to control the proportion of outside air in the air conditioning intake system of the target vehicle to the total air intake volume; controlling the target vehicle to ventilate based on the target air intake ratio, and determining whether to continue updating the target air intake ratio according to the first preset ratio or stop the operation after each preset time period; updating the air intake speed of the external air intake channel when the target air intake ratio is greater than a first target value and the actual carbon dioxide concentration value in the target vehicle is greater than a first preset concentration value.

[0067] Specifically, the air intake speed of the external air intake channel is updated by increasing the air intake speed of the external air intake channel according to a second preset ratio to obtain a target air intake speed. The air intake speed is used to control the rotation speed of the air conditioning blower of the target vehicle. The target vehicle is controlled to ventilate based on the target air intake speed, and after each preset time period, it is determined whether to continue updating the target air intake speed according to the second preset ratio or to stop the operation. If the target air intake speed is greater than the second target value and the actual carbon dioxide concentration in the target vehicle is greater than the first preset concentration value, the air intake ratio is increased according to the first preset ratio until a third target value is reached, where the third target value is greater than the first target value.

[0068] When the air intake ratio is the third target value and the actual carbon dioxide concentration in the target vehicle is greater than the first preset concentration value, the air intake speed is increased further according to the second preset ratio until the fourth target value is reached, where the fourth target value is greater than the second target value.

[0069] To facilitate understanding of the above process, some specific embodiments are explained below.

[0070] Figure 7This is a flowchart of an air purification mode for a vehicle carbon dioxide concentration control method according to an embodiment of this application, as shown below. Figure 7 As shown, in some embodiments of this application, when the air freshening mode is activated based on the first comparison result (S702), the air conditioning system mixes internal and external air circulation to ensure fresh air in the cabin based on the external temperature and CO2 concentration in the cabin collected by the air conditioning controller. The air conditioning system collects the external ambient temperature and receives the CO2 concentration signal in the cabin (S704). When the CO2 concentration is detected to exceed 0.07% (700ppm) (S706), if the air conditioning intake system is not activated, the air conditioning intake system is activated (S708). The air conditioning intake fan speed is activated according to the user's last default setting. If there is no default setting, it is activated at 20% of the maximum fan speed (S710). If the external circulation is not activated, the external circulation mode is activated (S712). The external and internal circulation are mixed. When the external circulation activation ratio is 10% or the existing external circulation mode is activated, the air conditioning system will activate the air conditioning system (S708). Under the recirculation ratio, if the CO2 concentration does not decrease to below 0.07% after 1 minute of air intake (i.e., the preset time period), the external recirculation air intake ratio is increased by 5%. After running for 1 minute, the CO2 concentration is checked. This cycle continues until the external recirculation ratio increases to 60%. If the CO2 concentration does not decrease to 0.07% after 1 minute, the air intake speed is increased by 5%. If the CO2 concentration does not decrease to 0.07% after 1 minute, the air intake speed is increased by 5% again until it reaches 60% of the maximum speed. If the CO2 concentration still does not decrease to 0.07%, the external recirculation opening ratio is increased by 5% again until it reaches 100% external recirculation. If the CO2 concentration still does not decrease to 0.07%, the speed is increased by 5% again until it reaches 100% speed. If the driver manually / voice-commands to turn off or specify the external recirculation ratio / speed, the command will be executed (S714).

[0071] The above embodiments enable the system to move away from relying on a single fixed strategy and instead dynamically optimize ventilation intensity based on the actual purification effect. This can significantly reduce energy consumption by gradually increasing air volume only when necessary, avoiding a surge in air conditioning load caused by directly opening the external circulation mode. Furthermore, it can improve user acceptance, as the ventilation process is smooth and free of abrupt wind noise or temperature fluctuations, preventing passenger discomfort caused by sudden strong winds. In addition, it can enhance the system's adaptability, allowing the system to automatically adjust its strategy according to the actual concentration change rhythm regardless of whether the vehicle is in urban congestion, high-speed driving, or low-temperature idling conditions, without the need for manual intervention.

[0072] Step S206: If the comparison results indicate that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system, a control command is generated.

[0073] In step S206 above, the control command refers to a set of standardized operating commands with a clear timing and priority, sent by the CO2 monitoring controller to various actuators of the vehicle after confirming a leak. This command is not a single action, but a composite command package involving multiple systems working together, including but not limited to: opening windows, activating the sunroof, forcing full external air circulation, activating the vent fan, triggering the T-BOX remote alarm, and illuminating the IVI system warning interface. It should be noted that when the carbon dioxide concentration in the air conditioning unit and / or cabin exceeds a second preset concentration value (e.g., 0.15%) and continues to meet the time condition, a refrigerant leak in the carbon dioxide heat pump system can be determined.

[0074] In some embodiments of this application, the ventilation actuator includes multiple sub-actuators, and control commands are used to control at least one of the following sub-actuators: door controller, sunroof controller, infotainment controller, and vent fan, wherein the infotainment controller is used to send leakage alert information.

[0075] In some embodiments of this application, when the power supply to the target vehicle is cut off, the target carbon dioxide concentration value collected by the target sensor is obtained, wherein the target sensor is a sensor connected to the backup power supply of the target vehicle among multiple sensors; the target carbon dioxide concentration value is compared with a third preset concentration value to obtain a fourth comparison result; if the fourth comparison result indicates that the target carbon dioxide concentration value is greater than the third preset concentration value, the target ventilation actuator connected to the backup power supply is controlled to perform ventilation operation.

[0076] To facilitate understanding of the above process, some specific embodiments are explained below. Figure 8 This is a flowchart illustrating the leakage mode of a vehicle carbon dioxide concentration control method according to an embodiment of this application, such as... Figure 8 As shown, in some embodiments of this application, after detecting that the CO2 concentration in the air conditioning compartment and cabin reaches a leakage concentration of 0.15%, the system immediately enters leakage mode (S802). The CO2 monitoring controller MCU sends a leakage command on the CAN bus (S804). According to the leakage command, the door controller lowers the window glass, the sunroof controller opens the sunroof, the IVI infotainment controller sends a CO2 leakage warning through the instrument panel or central control display, and sends a distress signal to the car manufacturer's service desk through the T-BOX. At the same time, the air conditioning controller turns on 100% external circulation and runs at the maximum air intake speed. The CO2 monitoring controller MCU drives the vent fan to start ventilation. If the vehicle loses power in special conditions such as a collision, the backup power supply of the CO2 monitoring controller MCU is activated. The CO2 concentration sensor 3 (connected to the CO2 monitoring controller MCU) collects the concentration signal. If the CO2 concentration exceeds 0.1% (i.e., the third preset concentration value, which can be less than the second preset concentration value), the vent fan is controlled to rotate (S806).

[0077] The above embodiments take into account physical ventilation (windows, sunroof, fans), air exchange (air conditioning external circulation), information warning (IVI) and remote rescue (T-BOX), constructing a comprehensive coverage network. Furthermore, through backup power and independent sensor architecture, it ensures that basic protection capabilities can still be maintained in extreme situations such as collision power outages.

[0078] Step S208: Control the ventilation actuator in the target vehicle to perform ventilation operation based on the control command.

[0079] In step S208 above, when the control command is triggered under normal vehicle power supply conditions, the system can activate one or more ventilation actuators with the highest priority; when the main power system is cut off due to a collision, the conventional air conditioning controller, body controller, etc., all stop working, but the CO2 monitoring controller continues to operate because it is connected to a dedicated backup power supply. At this time, the control command is only directed to the target ventilation actuator directly connected to the backup power supply, such as the independent vent fan at the rear of the vehicle.

[0080] In some embodiments of this application, the following steps may also be performed: obtaining the operating conditions of the target vehicle; and, if the operating conditions indicate that a fire has occurred in the target area of ​​the target vehicle, controlling the carbon dioxide heat pump system to inject carbon dioxide refrigerant into the target area.

[0081] It should be noted that a valve device is installed in the target area, which includes a first port, a second port and a third port. The first port and the second port are connected in series to the high-pressure refrigerant circulation pipeline of the carbon dioxide heat pump system. In the event of a fire, the third port is connected to the first port to inject carbon dioxide refrigerant into the target area.

[0082] Operating conditions refer to the set of vehicle operating status parameters collected and comprehensively judged in real time by multiple sensors and control systems during vehicle operation, including but not limited to: abnormal increase in front engine compartment temperature, battery pack thermal runaway signal, smoke detector alarm, fire extinguishing command manually triggered by the driver, or flame image detected by the vehicle camera, etc.

[0083] Specifically, when the temperature sensor in the vehicle's front engine compartment detects that the local temperature increases by a preset amount within a preset time period, and simultaneously a smoke detector outputs an alarm signal and / or the high-voltage wiring harness insulation monitoring module reports a sudden drop in insulation resistance, the vehicle control unit (HCU) sends the aforementioned signals to the CO2 monitoring controller via the CAN bus. The CO2 monitoring controller confirms the fire event and sends a switching command to the three-way solenoid valve (i.e., the valve device) in the heat pump system. This solenoid valve is originally a heat pump circulation valve, with two ports connected to the high-pressure carbon dioxide pipeline (one end of the pipeline connected to the first port, and the other end connected to the second port), and the third port directly connected to the sealed cavity at the top of the front engine compartment via a dedicated conduit. Upon receiving the command, the solenoid valve actuates, cutting off the normal heat pump circulation path and opening the release channel to the front engine compartment.

[0084] In some embodiments of this application, if a fire breaks out in the engine compartment, a CO2 protection mode can be activated with a single button. When a fire occurs in the forward engine compartment, the pilot can operate the button to release CO2 into the forward engine compartment. This can be operated on the IVI central control screen. There is a three-way solenoid valve in the forward engine compartment, with two of the two ends connected to the CO2 high-pressure pipeline. When the solenoid valve receives a control signal, it releases CO2 through the unconnected end. If the 12V power supply is no longer available at this time, the pilot can also manually operate the valve to release CO2. The released CO2 forms a gas protective layer to prevent the fire from burning further.

[0085] Through steps S202 to S208 above, a multi-point carbon dioxide concentration sensing method is adopted. By deploying sensors in multiple areas of the target vehicle to collect carbon dioxide concentration values, comparing them with preset safety thresholds, and automatically generating ventilation control commands when a refrigerant leak is detected, the vehicle's ventilation actuator is driven to start the air exchange operation. This achieves the goal of real-time, full-area monitoring of leak risks, thereby realizing the technical effect of rapid and reliable leak response. It also solves the technical problem that related technologies rely solely on carbon dioxide concentration detection within the air conditioning system, resulting in low response efficiency and increased safety hazards.

[0086] This application embodiment also provides a vehicle control system, which includes a target vehicle, multiple sensors, and a controller. The multiple sensors are installed in the target vehicle and connected to the controller to collect carbon dioxide concentration values ​​inside the target vehicle. The carbon dioxide concentration values ​​are determined based on the carbon dioxide concentration in the air conditioning unit and the passenger compartment of the target vehicle. The controller is connected to the controller and is used to compare the carbon dioxide concentration values ​​with preset concentration values ​​to obtain comparison results. If the comparison results indicate that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system, the controller generates control commands and controls the ventilation actuators inside the target vehicle to perform ventilation operations based on the control commands.

[0087] In some embodiments of this application, the multiple sensors include: a first sensor disposed in the air conditioning unit of the target vehicle, a second sensor disposed in the front of the cabin of the target vehicle, and a third sensor disposed in the rear of the cabin of the target vehicle, wherein the third sensor is connected to the controller.

[0088] In some embodiments of this application, a backup power supply and a vent fan are also included. The backup power supply is connected to the controller and is used to supply power to the controller when the power supply to the target vehicle is cut off and there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system. The vent fan is connected to the controller and is used to perform ventilation operation based on the controller's control signal.

[0089] It should be noted that the controller mentioned above refers to the CO2 monitoring controller MCU.

[0090] Figure 3 This is a schematic diagram of the vehicle layout according to an embodiment of the present application for a method of controlling vehicle carbon dioxide concentration. Figure 3 As shown, for example, CO2 concentration sensor 1 (302, i.e., the first sensor) is located inside the air conditioning compartment, CO2 concentration sensor 2 (304, i.e., the second sensor) is located at the front of the cabin, CO2 concentration sensor 3 (306, i.e., the third sensor) is located at the rear of the cabin, and the CO2 monitoring controller MCU and backup power supply (308) are located under the rear seats for easy replacement of the backup power supply and to prevent damage in a collision. The vent fan (310) is located above the vent at the rear of the vehicle. The specific location of CO2 concentration sensor 1 inside the air conditioning compartment is shown in [reference needed]. Figure 4 ,exist Figure 4 The image shows a top view (top) and a front view (bottom) of the three-compartment air conditioning unit. The CO2 concentration sensor 1 (404) is located between the heater core (402) and the evaporator (406). There is also an air filter (408) and a blower (410).

[0091] It should be noted that the aforementioned vehicle control system is used to execute... Figure 2 The method for controlling vehicle carbon dioxide concentration shown is therefore Figure 2 The explanations and descriptions in the vehicle carbon dioxide concentration control method also apply to the above-mentioned vehicle control system, and will not be repeated here.

[0092] Figure 5 This is a schematic diagram illustrating the control principle of a vehicle carbon dioxide concentration control method according to an embodiment of this application, such as... Figure 5As shown, in some embodiments of this application, the vehicle controller HCU (502) and the air conditioning controller AC (503) are on the same CAN bus. The vehicle controller HCU provides the power status of the vehicle, including when the vehicle is powered off, parked, or driving. The air conditioning controller AC collects signals from the ambient temperature sensor (505) and the CO2 concentration sensor 1 (506), and controls the operation of the compressor (504). The door controller (507), seat controller (508), CO2 monitoring controller MCU (509), body controller (510), CO2 concentration sensor 2 (511), and sunroof controller (512) are on the same CAN bus. The door controller can control the raising and lowering of the windows, the seat controller can detect whether someone is sitting in the seat, and the body controller collects signals from the CO2 concentration sensor 2. The signal can also collect the remote key (517) locking signal (516), the sunroof controller can control the opening and closing of the sunroof, the CO2 monitoring controller controls the operation of the body vent fan (514), collect the CO2 concentration sensor 3 (515), and in addition to connecting to the whole vehicle 12V low voltage power system, there is also a backup 12V power system (513). In the event of a power failure of the whole vehicle low voltage, the backup 12V power system starts to supply power to the CO2 detection controller; T-BOX (518) and IVI entertainment host (519) are on a CAN bus. T-BOX communicates with the cloud server (520) and can interact with the mobile APP (521). IVI entertainment host can interact with the driver or the occupants of the vehicle. The above three CAN buses are used for signal forwarding and interaction through the gateway GW (501).

[0093] Figure 6 This is an overall control flowchart of a vehicle carbon dioxide concentration control method according to an embodiment of this application, as shown below. Figure 6 As shown, after the vehicle is parked and powered off, the CO2 monitoring controller MCU obtains the number of occupants from the seat controller via the bus. When no one is in the vehicle, the CO2 monitoring controller MCU enters a deep sleep mode and no longer monitors the overall vehicle CO2 concentration. However, it continues to monitor when it receives a control command from the mobile APP (S602). When the vehicle is unlocked and woken up, the three CO2 concentration sensors begin to detect the CO2 concentration in the air conditioning system and the cabin (S604).

[0094] (1) The cabin air freshening mode is enabled by default (S606).

[0095] (2) Once the CO2 concentration in the air conditioning unit and cabin reaches 0.15%, the system immediately enters the leakage mode (S608).

[0096] (3) If the cabin is on fire, enter the CO2 protection mode (S610) with one key.

[0097] It should be noted that, Figure 6 Preferred embodiments of the shown examples can be found in [reference needed]. Figure 2 The corresponding solutions in the illustrated embodiments will not be described in detail here.

[0098] Figure 9 This is a structural diagram of a vehicle carbon dioxide concentration control device according to an embodiment of this application, as shown below. Figure 9 As shown, the device includes:

[0099] The acquisition module 902 is used to acquire the carbon dioxide concentration value of the target vehicle through multiple sensors. The target vehicle is equipped with a carbon dioxide heat pump system for regulating temperature. The carbon dioxide concentration value is determined based on the carbon dioxide concentration in the air conditioning unit and the cabin of the target vehicle.

[0100] The comparison module 904 is used to compare the carbon dioxide concentration value with the preset concentration value to obtain the comparison result;

[0101] The determination module 906 is used to generate control commands when the comparison results indicate that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system;

[0102] The execution module 908 is used to control the ventilation actuator in the target vehicle to perform ventilation operations based on control commands.

[0103] It should be noted that, Figure 9 The vehicle carbon dioxide concentration control device shown is used to perform... Figure 2 The method for controlling vehicle carbon dioxide concentration shown is therefore Figure 2 The relevant explanations in the vehicle carbon dioxide concentration control methods also apply to Figure 9 The vehicle carbon dioxide concentration control device shown is not described in detail here.

[0104] This application also provides a vehicle including a vehicle control system, which is used to execute the steps of the vehicle carbon dioxide concentration control method implemented in various embodiments of this application.

[0105] This application also provides an electronic device, which includes a memory and a processor, wherein the memory is used to store program instructions; the processor is connected to the memory and is used to execute steps of the vehicle carbon dioxide concentration control method implemented in various embodiments of this application.

[0106] This application also provides a non-volatile storage medium including a stored computer program, wherein the device containing the non-volatile storage medium executes the steps of the vehicle carbon dioxide concentration control method in various embodiments of this application by running the computer program.

[0107] This application also provides a computer program product, including computer instructions that, when executed by a processor, implement the steps of the vehicle carbon dioxide concentration control method in various embodiments of this application.

[0108] This application also provides a computer program that, when executed by a processor, implements the steps of the vehicle carbon dioxide concentration control method in various embodiments of this application.

[0109] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0110] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0111] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0112] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0113] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0114] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0115] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for controlling carbon dioxide concentration in a vehicle, characterized in that, include: The carbon dioxide concentration value of the target vehicle is collected by multiple sensors. The target vehicle is equipped with a carbon dioxide heat pump system for regulating temperature. The carbon dioxide concentration value is determined based on the carbon dioxide concentration in the air conditioning unit and the cabin of the target vehicle. The carbon dioxide concentration value is compared with a preset concentration value to obtain the comparison result; If the comparison results indicate that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system, a control command is generated. The control command controls the ventilation actuators within the target vehicle to perform ventilation operations.

2. The method according to claim 1, characterized in that, The preset concentration values ​​include a first preset concentration value and a second preset concentration value, wherein the first preset concentration value is less than the second preset concentration value; the carbon dioxide concentration value is compared with the preset concentration values ​​to obtain a comparison result, including: The carbon dioxide concentration value is compared with the first preset concentration value and the second preset concentration value, respectively; When the carbon dioxide concentration value is greater than the first preset concentration value and not greater than the second preset concentration value, a first comparison result is obtained; When the carbon dioxide concentration value is greater than the second preset concentration value, a second comparison result is obtained, wherein the second comparison result is used to indicate that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system.

3. The method according to claim 2, characterized in that, After obtaining the first comparison result, the method further includes: Control the target vehicle to simultaneously open the external air intake channel and the internal air circulation channel; The updated carbon dioxide concentration value of the target vehicle after a preset time period is collected, and the updated carbon dioxide concentration value is compared with the first preset concentration value to obtain a third comparison result; If the third comparison result indicates that the updated carbon dioxide concentration value is greater than the first preset concentration value, the control parameters corresponding to the external air intake channel are updated, wherein the control parameters are used to control the air intake ratio and air intake speed of the external air intake channel.

4. The method according to claim 3, characterized in that, Updating the control parameters corresponding to the external air intake channel includes: The air intake ratio of the external air intake channel is increased according to a first preset ratio to obtain a target air intake ratio, wherein the air intake ratio is used to control the proportion of outside air in the air conditioning intake system of the target vehicle to the total air intake volume. The system controls the target vehicle to ventilate based on the target air intake ratio, and after each preset time period, it determines whether to continue updating the target air intake ratio according to the first preset ratio or to stop the operation. If the target air intake ratio is greater than the first target value and the actual carbon dioxide concentration in the target vehicle is greater than the first preset concentration value, the air intake speed of the external air intake channel is updated.

5. The method according to claim 4, characterized in that, Updating the air intake velocity of the external air intake channel includes: The air intake speed of the external air intake channel is increased by a second preset ratio to obtain a target air intake speed, wherein the air intake speed is used to control the rotation speed of the air conditioning blower of the target vehicle. The target vehicle is controlled to ventilate based on the target air intake speed, and after each preset time period, it is determined whether to continue updating the target air intake speed according to the second preset ratio or to stop the operation. If the target air intake velocity is greater than the second target value and the actual carbon dioxide concentration in the target vehicle is greater than the first preset concentration value, the air intake ratio is increased further according to the first preset ratio until a third target value is reached, wherein the third target value is greater than the first target value.

6. The method according to claim 5, characterized in that, The method further includes: when the air intake ratio is the third target value and the actual carbon dioxide concentration in the target vehicle is greater than the first preset concentration value, increasing the air intake speed according to the second preset ratio until a fourth target value is reached, wherein the fourth target value is greater than the second target value.

7. The method according to claim 1, characterized in that, The ventilation actuator includes multiple sub-actuators, and the control command is used to control at least one of the following sub-actuators: door controller, sunroof controller, infotainment controller, and vent fan, wherein the infotainment controller is used to send a leak alert message.

8. The method according to claim 1, characterized in that, The method further includes: When the power supply to the target vehicle is cut off, the target carbon dioxide concentration value collected by the target sensor is obtained, wherein the target sensor is one of the plurality of sensors connected to the backup power supply of the target vehicle; The target carbon dioxide concentration value is compared with the third preset concentration value to obtain a fourth comparison result; If the fourth comparison result indicates that the target carbon dioxide concentration value is greater than the third preset concentration value, the target ventilation actuator connected to the backup power supply is controlled to perform ventilation operation.

9. The method according to claim 1, characterized in that, The method further includes: Obtain the operating conditions of the target vehicle; When the operating conditions indicate that a fire has occurred in the target area of ​​the target vehicle, the carbon dioxide heat pump system is controlled to inject carbon dioxide refrigerant into the target area.

10. The method according to claim 9, characterized in that, A valve device is installed in the target area, wherein the valve device includes a first port, a second port and a third port. The first port and the second port are connected in series and connected to the high-pressure refrigerant circulation pipeline of the carbon dioxide heat pump system. In the event of a fire, the third port is connected to the first port to inject the carbon dioxide refrigerant into the target area.

11. A vehicle control system, characterized in that, This includes the target vehicle, multiple sensors, and a controller, among which... The multiple sensors are installed in the target vehicle and connected to the controller to collect the carbon dioxide concentration value inside the target vehicle. The carbon dioxide concentration value is determined based on the carbon dioxide concentration in the air conditioning unit and the cabin of the target vehicle. The controller, connected to the controller, is used to compare the carbon dioxide concentration value with a preset concentration value to obtain a comparison result, and when the comparison result indicates that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system, it generates a control command and controls the ventilation actuator in the target vehicle to perform ventilation operation based on the control command.

12. The system according to claim 11, characterized in that, The plurality of sensors include: a first sensor disposed in the air conditioning unit of the target vehicle, a second sensor disposed in the front of the cabin of the target vehicle, and a third sensor disposed in the rear of the cabin of the target vehicle, wherein the third sensor is connected to the controller.

13. The system according to claim 11, characterized in that, It also includes a backup power supply and a vent fan, among which, The backup power supply is connected to the controller and is used to supply power to the controller when the power supply of the target vehicle is cut off and there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system. The vent fan is connected to the controller and is used to perform ventilation operations based on the control signals from the controller.

14. A device for controlling the carbon dioxide concentration of a vehicle, characterized in that, include: The acquisition module is used to acquire the carbon dioxide concentration value of the target vehicle through multiple sensors. The target vehicle is equipped with a carbon dioxide heat pump system for regulating temperature. The carbon dioxide concentration value is determined based on the carbon dioxide concentration in the air conditioning unit and the cabin of the target vehicle. The comparison module is used to compare the carbon dioxide concentration value with a preset concentration value to obtain a comparison result; The determination module is used to generate control commands when the comparison results indicate that there is a carbon dioxide refrigerant leak in the carbon dioxide heat pump system; An execution module is used to control the ventilation actuator in the target vehicle to perform ventilation operations based on the control commands.

15. A vehicle, characterized in that, The system includes a vehicle control system for executing a method for controlling the carbon dioxide concentration of a vehicle as described in any one of claims 1 to 10.

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