An intelligent method and system for switching between internal and external circulation of a vehicle air conditioner

Abstract

The present invention relates to the field of automotive intelligent electronics, and particularly to an intelligent in-vehicle air conditioner internal and external circulation switching method and system, which is used to solve the problem that there is no dedicated system for automatically switching the in-vehicle air conditioner between internal and external circulation in the case of traffic jams, red light idling, and external air pollution. Based on the real-time obtained state data of the vehicle body and external environment data, the present invention determines whether the external circulation mode of the air conditioner will affect the air quality inside the vehicle, and avoids harmful gases from invading the vehicle by timely switching the external circulation mode of the air conditioner to the internal circulation mode.

Description

Technical Field

[0001] The present invention relates to the field of automotive intelligent electronics, and particularly to an intelligent internal and external circulation switching method and system for vehicle air conditioners. Background Art

[0002] When most drivers are driving and encounter a red light or traffic jam, they don't think of turning off the external circulation of the air conditioner and using the internal circulation immediately. In this way, the air conditioner will blow the polluted air from the outside into the interior, and the environment in the driver's cab and the passenger compartment will be polluted by vehicle exhaust, which will damage the health of the passengers.

[0003] In the prior art, there is no system specifically for automatically switching the internal and external circulation of vehicle air conditioners in the case of traffic jams, idling at red lights, and external air pollution. Summary of the Invention

[0004] In view of the above problems, the present invention provides an intelligent internal and external circulation switching method and system for vehicle air conditioners. Based on the state data of the vehicle body and external environment data obtained in real time, the present invention determines whether the external circulation mode of the air conditioner will affect the air quality inside the vehicle, and avoids the intrusion of harmful gases into the vehicle by timely switching the external circulation mode of the air conditioner to the internal circulation mode.

[0005] An intelligent internal and external circulation switching method for vehicle air conditioners includes:

[0006] The air conditioner controller obtains the internal and external circulation switching parameters of the vehicle air conditioner, and determines whether the vehicle is currently in any of the three states: vehicle traffic jam, vehicle idling at a red light intersection, or excessive external air pollution;

[0007] If the vehicle is currently in any of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator to switch the vehicle air conditioner to the internal circulation.

[0008] Further, the internal and external circulation switching parameters include one or more of a first switching parameter, a second switching parameter, and a third switching parameter, wherein,

[0009] The first switching parameter includes traffic jam information and low vehicle speed information, and is used to determine whether the vehicle is currently in a traffic jam state;

[0010] The second switching parameter includes red light information, parking information, and current high-density vehicle information, and is used to determine whether the vehicle is currently in the state of idling at a red light intersection;

[0011] The third switching parameter includes excessive air pollution information, and is used to determine whether the current state belongs to the state where the external air pollution exceeds the threshold.

[0012] Further, the first switching parameter includes traffic jam information and low vehicle speed information, and is used to determine whether the vehicle is currently in a traffic jam state. Specifically, it includes:

[0013] The first switching parameter includes traffic jam information obtained from the navigation system and whether the vehicle speed is less than the low speed threshold obtained from the Electronic Stability Program (ESP) system;

[0014] If the vehicle simultaneously meets the following two conditions: the vehicle is currently in a traffic jam section and the vehicle speed is less than the low speed threshold, it is determined that the vehicle is currently in a traffic jam state.

[0015] Further, the second switching parameter includes red light information, parking information, and current high-density vehicle information, and is used to determine whether the vehicle is currently in an idle stop state at a red light intersection. Specifically, it includes:

[0016] The second switching parameter includes whether the current vehicle is at a traffic light intersection and red light information obtained from the navigation system, the parking state obtained from the ESP system, and the density of surrounding vehicles obtained from the Advanced Driver Assistance System (ADAS) system;

[0017] If the vehicle simultaneously meets the following four conditions: the vehicle is at a traffic light intersection, the traffic light is red, the vehicle is in a parked state, and the number of vehicles in front, behind, left, and right is greater than the quantity threshold, it is determined that the vehicle is currently in an idle stop state at a red light intersection.

[0018] Further, the third switching parameter includes pollution exceeding standard information, and is used to determine whether the current state belongs to the state where external air pollution exceeds the threshold. Specifically, it includes:

[0019] The third switching parameter includes the external air pollution index detected by the vehicle's outdoor pollution detection equipment;

[0020] If the external air pollution index exceeds the air quality threshold, it is determined that the external air pollution exceeds the standard state.

[0021] Further, if the vehicle is currently in any one of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator to switch the vehicle air conditioner to the internal circulation. Specifically, it includes:

[0022] At regular time intervals, the air conditioner controller detects whether the vehicle is currently in any one of the three states. If the vehicle is in any one of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator, and the external circulation actuator switches the vehicle air conditioner to the internal circulation.

[0023] Further, the switching method further includes: if the current state does not belong to any one of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator to switch the vehicle air conditioner to the external circulation.

[0024] An intelligent in - vehicle air - conditioner internal and external circulation switching system, comprising:

[0025] An air - conditioner controller, which is used to obtain the parameters for switching the internal and external circulation of the in - vehicle air - conditioner, and judge whether the vehicle is currently in any of the three states: vehicle congestion, vehicle idling at a red - light intersection, or excessive external air pollution. If the vehicle is currently in any of the three states, the air - conditioner controller issues a switching instruction to the internal and external circulation actuator;

[0026] The internal and external circulation actuator is used to switch the in - vehicle air - conditioner to the internal circulation according to the switching instruction.

[0027] Furthermore, the internal and external circulation switching parameters include one or more of a first switching parameter, a second switching parameter, and a third switching parameter. Among them,

[0028] The first switching parameter includes congestion information and low - speed information, which is used to judge whether the vehicle is currently in a congested state;

[0029] The second switching parameter includes red - light information, parking information, and current high - density vehicle information, which is used to judge whether the vehicle is currently in the state of idling at a red - light intersection;

[0030] The third switching parameter includes pollution - exceeding information, which is used to judge whether the current state belongs to the state where the external air pollution exceeds the threshold.

[0031] Furthermore, if the vehicle is currently in any of the three states, the in - vehicle air - conditioner automatically switches to the internal circulation. Specifically, if the vehicle is not currently in any of the three states, the air - conditioner controller issues a switching instruction to the internal and external circulation actuator to switch the in - vehicle air - conditioner to the external circulation.

[0032] An intelligent in - vehicle air - conditioner internal and external circulation switching system designed by the present invention can intelligently switch the external circulation of the air - conditioner to the internal circulation when encountering congestion or idling at a red - light intersection, which can reduce the threat to the health of vehicle occupants from toxic exhaust gas in the case of congestion and idling at a red - light intersection.

[0033] Based on the real - time acquired state data of the vehicle body and external environment data, the present invention judges whether the external circulation mode of the air - conditioner will affect the air quality inside the vehicle, and avoids the intrusion of harmful gases into the vehicle by timely switching the external circulation mode of the air - conditioner to the internal circulation mode.

[0034] Other features and advantages of the present invention will be described in the following specification, and, in part, will become obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures pointed out in the specification and the drawings. Brief Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a flowchart of the method of the embodiment of the present invention.

[0037] Figure 2 It is a schematic diagram of the system of the embodiment of the present invention.

[0038] Figure 3 It is the working logic diagram of the system of the embodiment of the present invention. Detailed implementation manners

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, rather than all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0040] In the prior art, there is no dedicated system for automatically switching the in - loop and out - loop of the vehicle air conditioner in the case of traffic jams, red - light idling, and external air pollution. For this reason, the present invention provides a method and system for intelligent in - loop and out - loop switching of a vehicle air conditioner, including a method for intelligent in - loop and out - loop switching of a vehicle air conditioner and a system for intelligent in - loop and out - loop switching of a vehicle air conditioner.

[0041] The technical solution of the present invention is to design an intelligent internal and external circulation switching system for automotive air conditioners based on ADAS. This system includes an ADAS system (Advanced Driving Assistance System), a navigation system, outdoor pollution detection equipment, an ESP system (Electronic Stability Program), an audio entertainment system, an air conditioning system, and a network management system. The ADAS and outdoor pollution detection equipment are input devices that provide switching input signals to the air conditioning system. The judgment conditions for switching from the internal circulation to the external circulation or from the external circulation to the internal circulation are determined by the input signals. After receiving the input signal, the air conditioning system will switch the external circulation to the internal circulation or switch back to the external circulation when the external environment improves. The signal transmission is carried out through network management. Currently, the network management of automobiles includes CAN, lin, or Internet, etc.

[0042] In a first aspect, as Figure 1 shown, the present invention provides a method for intelligent internal and external circulation switching of an in-vehicle air conditioner, including:

[0043] The air conditioning controller obtains the internal and external circulation switching parameters of the in-vehicle air conditioner and determines whether the vehicle is currently in any of the three states: vehicle congestion, vehicle idling at a red light intersection, or excessive outdoor air pollution, based on the parameters;

[0044] If the vehicle is currently in any of the three states, the air conditioning controller issues a switching instruction to the internal and external circulation actuator to switch the in-vehicle air conditioner to the internal circulation.

[0045] In this embodiment, the internal and external circulation switching parameters include one or more of a first switching parameter, a second switching parameter, and a third switching parameter, where

[0046] The first switching parameter includes congestion information and low vehicle speed information, and is used to determine whether the vehicle is currently in a congested state;

[0047] The second switching parameter includes red light information, parking information, and current high-density vehicle information, and is used to determine whether the vehicle is currently in an idling state at a red light intersection;

[0048] The third switching parameter includes excessive air pollution information, and is used to determine whether the current outdoor air pollution exceeds the threshold.

[0049] In specific implementation, the navigation system is integrated into the audio entertainment system. The navigation system is connected to the audio host, and the traffic jam information and the status of traffic lights obtained by the navigation system are both sent to the air conditioner controller through the audio host. The ESP system is used to detect the vehicle's own speed and feedback the speed information to the air conditioner controller in real time. The ADAS is used to detect whether the external vehicle has stopped and whether the vehicle in front is still emitting exhaust. If the vehicle in front is still emitting exhaust, the ADAS system will send this signal to the air conditioner controller. After the vehicle exterior pollution detection device detects that there are harmful elements to the human body in the vehicle exterior exhaust gas or air quality, it will send this information to the air conditioner controller.

[0050] In this embodiment, the first switching parameter includes traffic jam information and low speed information, and is used to determine whether the current is in a traffic jam state of the vehicle. Specifically, it includes:

[0051] The first switching parameter includes traffic jam information obtained according to the navigation system and whether the vehicle speed of the vehicle is less than the low speed threshold obtained according to the Electronic Stability Program (ESP) system;

[0052] If the vehicle simultaneously meets the following two conditions: the vehicle is currently in a traffic jam section and the vehicle speed is less than the low speed threshold, it is determined that the current is in a traffic jam state of the vehicle.

[0053] In specific implementation, the current lane usually includes different two-way lanes. For example, the inbound lane is congested, but the outbound lane may not be congested; or a certain lane has temporary congestion due to accidents or construction, etc., and the navigation system cannot accurately detect the specific lane information under the current technical conditions; or the congestion situation on the congested section is gradually improving and the vehicle speed is slowly rising, etc. Therefore, using both the traffic jam section and whether the vehicle speed is less than the low speed threshold for judgment improves the accuracy of judgment.

[0054] The low speed threshold is initially set to 20 km / h and can be dynamically set according to driving habits and historical data of vehicle speeds.

[0055] In this embodiment, the second switching parameter includes red light information, stop information, and current high-density vehicle information, and is used to determine whether the current belongs to the state of the vehicle idling and stopping at a red light intersection. Specifically, it includes:

[0056] The second switching parameter includes whether the current vehicle is at a traffic light intersection and red light information obtained according to the navigation system, the stop state obtained according to the ESP system, and the density of surrounding vehicles obtained according to the Advanced Driver Assistance System (ADAS) system;

[0057] If the vehicle simultaneously meets the following four conditions: the vehicle is at a traffic light intersection, the intersection is a red light, the vehicle is in a stopped state, and the number of vehicles in front, behind, left, and right is greater than the number threshold, it is determined that the vehicle is currently in the state of the vehicle idling and stopping at a red light intersection.

[0058] In specific implementation, the quantity threshold is set between 3 vehicles and 10 vehicles. At this time, there are many surrounding vehicles, which means that the vehicle exhaust emissions are large and difficult to be diluted in the air in a short time, and the surrounding air quality is poor.

[0059] In this embodiment, the third switching parameter includes pollution exceeding standard information, which is used to judge whether the current state belongs to the state where the external air pollution exceeds the threshold. Specifically, it includes:

[0060] The third switching parameter includes the external air pollution index detected by the vehicle outdoor pollution detection device;

[0061] If the external air pollution index exceeds the air quality threshold, it is judged that the external air pollution exceeds the standard state.

[0062] In specific implementation, the vehicle outdoor pollution detection device reflects the external air pollution index by detecting the content of pollution components in the air. The air quality threshold is set according to the air quality index, NOx content, PM2.5 content, etc. announced by the country, or can be dynamically set by the air conditioner controller according to data such as the location city, seasonal conditions or historical air quality index. If it is lower than the air quality threshold, the air quality is good; if it is higher than the air quality threshold, it represents air pollution.

[0063] In this embodiment, if the vehicle is currently in any one of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator to switch the vehicle-mounted air conditioner to the internal circulation. Specifically, it includes:

[0064] At every fixed time interval, the air conditioner controller detects whether the vehicle is currently in any one of the three states. If the vehicle is in any one of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator, and the external circulation actuator switches the vehicle-mounted air conditioner to the internal circulation.

[0065] In specific implementation, the fixed time interval is adjustable, usually set between 5 seconds and 30 seconds. If the fixed time interval is set too short, the vehicle-mounted air conditioner may switch frequently; if the fixed time interval is set too long, the vehicle-mounted air conditioner may not be able to respond to the change of the external state in time. Therefore, usually, the air conditioner controller continuously adjusts the fixed time interval according to conditions such as driving habits, records of changes in external states, and historical records of switching of the vehicle-mounted air conditioner, so as to achieve a better driving experience.

[0066] In this embodiment, the switching method further includes: if the current state does not belong to any one of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator to switch the vehicle-mounted air conditioner to the external circulation.

[0067] In specific implementation, the switching instruction includes: a first switching instruction for switching from the external circulation to the internal circulation and a second switching instruction for switching from the internal circulation to the external circulation.

[0068] At fixed time intervals, the air-conditioning controller detects whether the vehicle is currently in any of the three states. If the vehicle is in any of the three states, the air-conditioning controller issues a switching instruction to the internal and external circulation actuator, and the external circulation actuator switches the vehicle-mounted air conditioner to the internal circulation; conversely, if the vehicle is not in any of the three states, the air-conditioning controller issues a switching instruction to the internal and external circulation actuator, and the external circulation actuator switches the vehicle-mounted air conditioner to the external circulation.

[0069] In a second aspect, as Figure 2 shown, the present invention provides an intelligent internal and external circulation switching system for a vehicle-mounted air conditioner, including:

[0070] An air-conditioning controller, configured to obtain the internal and external circulation switching parameters of the vehicle-mounted air conditioner, and determine whether the vehicle is currently in any of the three states of vehicle traffic jam, vehicle idling at a red light intersection, or excessive external air pollution according to the parameters. If the vehicle is currently in any of the three states, the air-conditioning controller issues a switching instruction to the internal and external circulation actuator;

[0071] An internal and external circulation actuator, configured to switch the vehicle-mounted air conditioner to the internal circulation according to the switching instruction.

[0072] Specifically, in implementation, the implementation processes of the intelligent internal and external circulation switching system for the vehicle-mounted air conditioner and the intelligent internal and external circulation switching method for the vehicle-mounted air conditioner correspond one by one, and will not be elaborated here one by one.

[0073] To enable those skilled in the art to better understand the present invention, the judgment logic is further elaborated below with reference to the accompanying drawings:

[0074] As Figure 3 shown, the single-arrow solid line in the figure represents the one-way transmission of information through a hard wire connection. Embodiment 1 of the internal and external circulation switching: When the navigation system obtains traffic jam information, the traffic jam information will be sent by the audio host to the air-conditioning controller; when the ESP system calculates that the vehicle speed information is less than 20 km / h, it outputs to the air-conditioning controller. When the air-conditioning controller simultaneously receives the traffic jam information sent by the audio host and the vehicle speed information input by the ESP system is less than 20 km / h, the air conditioner will automatically switch the external circulation to the internal circulation. After the air conditioner is adjusted to the internal circulation, when the navigation traffic jam information disappears and there is no other input, the internal circulation will automatically switch to the external circulation.

[0075] The second implementation method for the internal and external circulation switching: When the navigation system obtains the traffic lights, the audio host inputs the traffic light status to the air conditioner controller at this time; When the ESP system receives the information that the vehicle has stopped, the ESP system will send the vehicle stop information to the air conditioner controller. At the same time, the ADAS system will detect the current vehicle density. When the number of vehicles in front, behind, left, and right is greater than 10, the ADAS system will send the vehicle density information to the air conditioner controller. When the air conditioner controller receives the traffic light information, the stop information, and the vehicle density information at the same time, the air conditioner controller controls the air conditioner actuator to switch the external circulation to the internal circulation. When the navigation system shows that the traffic light has passed and there is no other condition for switching to the internal circulation input, the air conditioner controller restores the internal circulation to the external circulation.

[0076] The third implementation method for the internal and external circulation switching: When the outdoor pollution detection device detects that the pollution exceeds the standard, the outdoor pollution detection device sends the pollution exceeding the standard signal to the air conditioner controller, and the air conditioner controller controls the internal and external circulation actuator to switch the external circulation to the internal circulation. When the pollution exceeding the standard signal disappears and there is no other input for switching to the internal circulation, the air conditioner controller controls the internal and external circulation actuator to switch the internal circulation to the external circulation.

[0077] According to the input signals such as the ADAS system, the present invention intelligently switches the external circulation of the air conditioner to the internal circulation of the air conditioner when there is a traffic jam, the vehicle idles and stops at traffic lights, or the external pollution is relatively serious, reduces the heat absorption of exhaust gas, protects the health of vehicle occupants, and improves the intelligent experience of customers.

[0078] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent internal and external circulation switching method for vehicle air conditioners, characterized in that, Including: The air-conditioning controller obtains the parameters for switching between the internal and external air circulation of the vehicle-mounted air conditioner, and determines whether the vehicle is currently in any of the three states: vehicle congestion, vehicle idling at a red light intersection, or excessive external air pollution, based on the parameters. If the vehicle is currently in any of the three states, the air-conditioning controller issues a switching instruction to the internal and external air circulation actuator to switch the vehicle-mounted air conditioner to the internal circulation. The internal and external air circulation switching parameters include one or more of a first switching parameter, a second switching parameter, and a third switching parameter, where The first switching parameter includes congestion information and low vehicle speed information, and is used to determine whether the vehicle is currently in a congested state. The second switching parameter includes red light information, parking information, and current high-density vehicle information, and is used to determine whether the vehicle is currently in the state of idling at a red light intersection. The third switching parameter includes information on excessive air pollution, and is used to determine whether the current state is one of excessive external air pollution exceeding the threshold. The first switching parameter includes congestion information and low vehicle speed information, and is used to determine whether the vehicle is currently in a congested state, specifically including: The first switching parameter includes congestion information obtained from the navigation system and whether the vehicle speed is less than the low-speed threshold obtained from the Electronic Stability Program (ESP) system. If the vehicle simultaneously meets the following two conditions: the vehicle is currently in a congested section and the vehicle speed is less than the low-speed threshold, it is determined that the vehicle is currently in a congested state. The second switching parameter includes red light information, parking information, and current high-density vehicle information, and is used to determine whether the vehicle is currently in the state of idling at a red light intersection, specifically including: The second switching parameter includes whether the current vehicle is at a traffic light intersection and red light information obtained from the navigation system, the parking state obtained from the ESP system, and the density of surrounding vehicles obtained from the Advanced Driver Assistance System (ADAS) system. If the vehicle simultaneously meets the following four conditions: the vehicle is at a traffic light intersection, the light at the intersection is red, the vehicle is in a parked state, and the number of vehicles in front, behind, left, and right is greater than the quantity threshold, it is determined that the vehicle is currently in the state of idling at a red light intersection. If the vehicle is currently in any of the three states, the air-conditioning controller issues a switching instruction to the internal and external air circulation actuator to switch the vehicle-mounted air conditioner to the internal circulation, specifically including: At regular time intervals, the air-conditioning controller detects whether the vehicle is currently in any of the three states. If the vehicle is in any of the three states, the air-conditioning controller issues a switching instruction to the internal and external air circulation actuator, and the external air circulation actuator switches the vehicle-mounted air conditioner to the internal circulation.

2. The intelligent internal and external air circulation switching method for a vehicle-mounted air conditioner according to claim 1, wherein The third switching parameter includes information on excessive pollution, and is used to determine whether the current state is one of excessive external air pollution exceeding the threshold, specifically including: The third switching parameter includes the external air pollution index detected by the vehicle's outdoor pollution detection equipment. If the external air pollution index exceeds the air quality threshold, it is determined that the external air pollution is in an excessive state.

3. The intelligent internal and external air circulation switching method for a vehicle-mounted air conditioner according to any one of claims 1-2, wherein The switching method further includes: if the current state does not belong to any of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator to switch the vehicle air conditioner to the external circulation.

4. An intelligent in-vehicle air conditioner internal and external circulation switching system, characterized in that, It includes: An air conditioner controller, which is used to obtain the internal and external circulation switching parameters of the vehicle air conditioner, and judge whether the vehicle is currently in any of the three states of vehicle traffic jam, vehicle idling at a red light intersection, or excessive external air pollution according to the parameters. If the vehicle is currently in any of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator; The internal and external circulation actuator is used to switch the vehicle air conditioner to the internal circulation according to the switching instruction; The internal and external circulation switching parameters include one or more of a first switching parameter, a second switching parameter, and a third switching parameter, where The first switching parameter includes traffic jam information and low vehicle speed information, and is used to judge whether the vehicle is currently in a traffic jam state; The second switching parameter includes red light information, parking information, and current high-density vehicle information, and is used to judge whether the vehicle is currently in the state of vehicle idling at a red light intersection; The third switching parameter includes information on excessive air pollution, and is used to judge whether the current state belongs to the state where the external air pollution exceeds the threshold; The first switching parameter includes traffic jam information and low vehicle speed information, and is used to judge whether the vehicle is currently in a traffic jam state. Specifically, The first switching parameter includes traffic jam information obtained from the navigation system and whether the vehicle speed is less than the low speed threshold obtained from the Electronic Stability Program (ESP) system; If the vehicle simultaneously meets the following two conditions: the vehicle is currently in a traffic jam section and the vehicle speed is less than the low speed threshold, it is judged that the vehicle is currently in a traffic jam state; The second switching parameter includes red light information, parking information, and current high-density vehicle information, and is used to judge whether the vehicle is currently in the state of vehicle idling at a red light intersection. Specifically, The second switching parameter includes whether the current vehicle is at a traffic light intersection and red light information obtained from the navigation system, the parking state obtained from the ESP system, and the density of surrounding vehicles obtained from the Advanced Driver Assistance System (ADAS) system; If the vehicle simultaneously meets the following four conditions: the vehicle is at a traffic light intersection, the traffic light is red, the vehicle is in a parked state, and the number of vehicles in front, behind, left, and right is greater than the quantity threshold, it is judged that the vehicle is currently in the state of vehicle idling at a red light intersection; If the vehicle is currently in any of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator to switch the vehicle air conditioner to the internal circulation. Specifically, At fixed time intervals, the air conditioner controller detects whether the vehicle is currently in any of the three states. If the vehicle is in any of the three states, the air conditioner controller issues a switching instruction to the internal and external circulation actuator, and the external circulation actuator switches the vehicle air conditioner to the internal circulation.

5. The intelligent internal and external circulation switching system for vehicle air conditioners according to claim 4, wherein If the vehicle is currently in any of the three states, the in-vehicle air conditioner automatically switches to the internal circulation. It further includes: if it is not in any of the three states currently, the air conditioner controller issues a switching instruction to the internal and external circulation actuator to switch the in-vehicle air conditioner to the external circulation.

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