CN110182019B - Control method for air quality in vehicle - Google Patents

Control method for air quality in vehicle Download PDF

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Publication number
CN110182019B
CN110182019B CN201910501958.1A CN201910501958A CN110182019B CN 110182019 B CN110182019 B CN 110182019B CN 201910501958 A CN201910501958 A CN 201910501958A CN 110182019 B CN110182019 B CN 110182019B
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vehicle
air
circulation
fogging
threshold
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CN110182019A (en
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冯婵婵
杨宗凌
彭晓勇
严诗杰
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SAIC Volkswagen Automotive Co Ltd
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SAIC Volkswagen Automotive Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/008Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being air quality
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00807Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a specific way of measuring or calculating an air or coolant temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention discloses a method for controlling the quality of air in a vehicle, which comprises the following steps: setting the device in an internal circulation mode in an initial state; judging whether fog is possible, if fog is possible, setting the operation demisting time interval in the external circulation mode and returning to the initial state; if the fog does not appear, maintaining the internal circulation mode and timing; if the timing time does not reach the first time threshold value, returning to the fogging judgment step; when the timing reaches a first time threshold value, judging the air quality outside the vehicle; if the quality of the air outside the vehicle meets the standard, returning to the initial state after the operation ventilation time interval in the external circulation mode is set, and resetting the timing; if the quality of the air outside the vehicle does not meet the standard, maintaining the air in the internal circulation mode and continuously timing; if the timing time does not reach the second time threshold value, returning to the fogging judgment step; and when the timed time reaches a second time threshold value, setting the mode in an external circulation mode, returning to an initial state after running the ventilation time interval, and clearing the timed time.

Description

Control method for air quality in vehicle
Technical Field
The invention relates to the technical field of automobiles, in particular to a control technology of air quality in an automobile.
Background
With the improvement of the automation degree of automobiles, the automobile air conditioner is mainly an automatic air conditioner. In the control logic of a general automatic air conditioner, the air circulation inside the vehicle is mainly set by external circulation, that is, air outside the vehicle is continuously introduced into the vehicle, and the air inside the vehicle is discharged, so that the air circulation inside and outside the vehicle is ensured, and the humidity and the carbon dioxide concentration inside the vehicle are maintained.
Because the air pollution condition is still serious at present, the condition of serious air pollution outside the automobile is often met, and at the moment, if the external circulation is mainly continued, the polluted air outside the automobile enters the automobile, so that the quality of the air inside the automobile is reduced. Because of the narrow space in the vehicle, the PM2.5 concentration in the vehicle rapidly rises after the contaminated air enters, causing discomfort to the passengers. When the air conditioner is in such a situation, a user often manually adjusts the control logic of the air conditioner, the external circulation is switched to the internal circulation, the air circulation inside and outside the vehicle is cut off, and the air inside the vehicle actually circulates in a closed environment.
Although the internal circulation mode can avoid the situation that outside polluted air enters the vehicle, in a closed environment where air circulation is lacked, the concentration of carbon dioxide in the vehicle is increased under the respiration action of passengers, and the humidity in the vehicle is increased. The increase of carbon dioxide concentration can cause fatigue of people, discomfort of passengers and hidden danger to safe driving of drivers. Humidity increases easily cause window fogging, affecting driving feeling.
The currently adopted solution is often to consider switching to the external circulation mode when the occupant feels discomfort (too high carbon dioxide concentration) or finds window fogging, and switching back to the internal circulation mode after the condition improves. This method is to switch after the uncomfortable feeling appears, and there is a limit to the improvement of the riding comfort and the driving comfort, and the switching is performed without considering the condition of the outside air, and sometimes the switching to the outside circulation is just when the quality of the outside air is poor, and the quality of the air in the vehicle is reduced.
In summary, in the prior art, the control logic for the air quality in the vehicle is too stiff, and a user feels bad by adopting a cutting mode.
Disclosure of Invention
The invention aims to provide a more flexible control logic for the air quality in a vehicle.
According to an embodiment of the present invention, a method for controlling air quality in a vehicle is provided, including:
in the initial state, the air in the vehicle is circularly set in an internal circulation mode;
a fogging judgment step of calculating a predicted value of fogging in the vehicle;
if the predicted value is larger than the fogging threshold value, the air in the vehicle is circularly set in an external circulation mode, and the vehicle returns to the initial state after running the demisting time interval;
if the predicted value is not greater than the fogging threshold value, the air circulation in the vehicle is maintained in an inner circulation mode, and the inner circulation duration time is timed;
if the predicted value is not greater than the fogging threshold value, continuously timing the internal circulation, and resetting the internal circulation continuous timing if the predicted value is greater than the fogging threshold value;
when the time of continuous timing of the internal circulation reaches a first time threshold, carrying out an air quality judgment step to check the air quality outside the vehicle;
if the quality of the air outside the vehicle meets the specified standard, the air inside the vehicle is circulated and set in an external circulation mode, the vehicle returns to the initial state after running the ventilation time interval, and the internal circulation continuous timing is cleared;
if the quality of the air outside the automobile does not meet the specified standard, the air circulation setting inside the automobile is maintained in an internal circulation mode, and the internal circulation is continuously timed and continuously carried out;
if the predicted value is not greater than the fogging threshold value, continuously timing the internal circulation, and resetting the internal circulation continuous timing if the predicted value is greater than the fogging threshold value;
and when the time of the internal circulation continuous timing reaches a second time threshold, setting the air circulation in the vehicle in an external circulation mode, returning to the initial state after running the ventilation time interval, and resetting the internal circulation continuous timing.
According to one embodiment of the invention, the predicted value of the in-vehicle fogging is calculated according to the glass temperature, the in-vehicle temperature and the in-vehicle humidity.
According to an embodiment of the present invention, the dew point temperature in the vehicle is calculated from the in-vehicle temperature and the in-vehicle humidity. And acquiring the temperature of the inner side surface of the glass, and calculating the difference between the temperature of the inner side surface of the glass and the dew point temperature, wherein the difference is used as a predicted value of the in-vehicle fogging.
According to an embodiment of the present invention, the fogging threshold is a range in which the in-vehicle air circulation is completely set in the inner circulation mode when the predicted value is lower than the lower limit of the fogging threshold, the in-vehicle air circulation is set in the inner and outer circulation mixed mode when the predicted value is between the lower limit and the upper limit of the fogging threshold, a ratio of the inner circulation to the outer circulation is correlated with the predicted value, and the in-vehicle air circulation is completely set in the outer circulation mode when the predicted value is higher than the upper limit of the fogging threshold.
According to an embodiment of the present invention, the method for controlling the quality of air in a vehicle further includes: and acquiring the temperature outside the vehicle, and setting and maintaining the air circulation inside the vehicle in an external circulation mode when the temperature outside the vehicle is lower than a defrosting threshold value.
According to an embodiment of the invention, the second time threshold is associated with an in-vehicle carbon dioxide concentration.
According to an embodiment of the invention, the second time threshold is greater than the first time threshold.
According to an embodiment of the invention, the first time threshold, the second time threshold, the defogging time interval, and the ventilation time interval are associated with a vehicle type.
The control method for the air quality in the vehicle can calculate according to the factors of the air quality outside the vehicle, the fogging risk in the vehicle and the estimated carbon dioxide concentration, and utilizes the external circulation as much as possible on the premise of ensuring the air quality in the vehicle and preventing fogging so as to control the carbon dioxide concentration in the vehicle to be at a more appropriate level and improve the use comfort of a driver and passengers. The method for controlling the air quality in the vehicle mainly updates the control logic, does not increase extra hardware, does not influence the use habit of a user, and has low implementation cost and obvious effect.
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The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:
fig. 1 discloses an implementation of a method for controlling the air quality in a vehicle according to an embodiment of the invention.
Fig. 2 discloses a judgment process of a fogging judgment step in a control scheme of air quality in a vehicle according to an embodiment of the present invention.
Fig. 3 discloses a timing sequence of the outer circulation ventilation after reaching the first time threshold in the control scheme of the air quality in the vehicle according to an embodiment of the invention.
Fig. 4 discloses a timing process of performing the external circulation ventilation after reaching the second time threshold in the control scheme of the air quality in the vehicle according to an embodiment of the invention.
Fig. 5 discloses a structural schematic diagram of the vehicle air conditioner.
Detailed Description
The invention aims to provide a more flexible control logic for the air quality in a vehicle, which can use the external circulation as much as possible on the premise of ensuring the air quality in the vehicle and preventing the fog in the vehicle according to the temperature, the humidity and the air quality inside and outside the vehicle, but also can intermittently switch to the external circulation when the air quality outside the vehicle is good or the duration time of the internal circulation is too long so as to control the concentration of carbon dioxide in the vehicle.
Fig. 5 shows a schematic structural diagram of the vehicle air conditioner, and although the specific structure of the vehicle air conditioner may be different between different manufacturers and different vehicle models, the basic structure is similar. In the vehicle air conditioner, an inside-outside circulation motor 201 is used to control circulation of air in the vehicle. The inside-outside circulation motor 201 switches between the inside circulation and the outside circulation by controlling the inside-outside circulation damper. When the air door is completely closed, the air in the vehicle circulates internally, and when the air door is completely opened, the air in the vehicle circulates externally. When the air door is partially opened, the internal and external circulation mixed mode with the corresponding proportion can be carried out according to the opening proportion of the air door.
Fig. 1 discloses an implementation of a method for controlling the air quality in a vehicle according to an embodiment of the invention. Referring to fig. 1, the method for controlling the quality of air in the vehicle is as follows:
101. an initial state. In the initial state, the air circulation in the vehicle is set in the internal circulation mode, namely the air door is completely closed.
102. And a fogging judgment step of calculating a predicted value of fogging in the vehicle. In the internal circulation mode, since a closed space is formed in the vehicle, the air circulation with the outside is cut off. After a period of time, the humidity in the automobile can rise, and when the temperature difference between the inside and the outside of the automobile is large, the phenomenon of fogging is easily generated on the glass of the automobile. In the fogging determination step, the possibility of fogging is determined. In one embodiment, the predicted value of in-vehicle fogging is calculated from the glass temperature, the in-vehicle temperature, and the in-vehicle humidity. Specifically, the in-vehicle temperature and the in-vehicle humidity are first acquired by the in-vehicle temperature and humidity sensor, and then the dew point temperature in the vehicle is calculated from the in-vehicle temperature and the in-vehicle humidity. Then the temperature of the inner side surface of the glass is obtained by a temperature sensor arranged on the inner surface of the automobile glass. And calculating the difference between the temperature of the inner side surface of the glass and the dew point temperature, and taking the difference as a predicted value of the in-vehicle fogging.
103. And if the predicted value is larger than the fogging threshold value, setting the air circulation in the vehicle in an external circulation mode, namely opening the air door. The initial state is returned after the demisting interval t4 of the outer loop mode operation. In one embodiment, the fogging threshold is a range in which the damper is fully closed and the vehicle air circulation is fully set in the internal circulation mode when the predicted value, i.e., the difference value, is lower than the lower limit of the fogging threshold. When the predicted value is between the lower limit and the upper limit of the fogging threshold, the air door is partially opened, the air circulation in the vehicle is set in the internal and external circulation mixed mode, and the proportion of the internal circulation and the external circulation is related to the predicted value, namely the difference value. And when the predicted value is higher than the upper limit of the fogging threshold, the air door is completely opened, and the air circulation in the vehicle is completely set in the external circulation mode. Fig. 2 discloses a judgment process of a fogging judgment step in a control scheme of air quality in a vehicle according to an embodiment of the present invention. In the embodiment shown in fig. 2, the fogging threshold is set in the range of 2 c to 6 c. When the difference between the temperature of the inner side surface of the glass and the dew point temperature is less than 2 ℃, the opening degree of the air door is 0 percent, and the air circulation in the vehicle is completely set in the internal circulation mode. When the difference between the temperature of the inner surface of the glass and the dew point temperature is between 2 ℃ and 6 ℃, the opening degree of the air door and the difference are in a linear relation, the opening degree of the air door is linearly changed between 0 percent and 100 percent and corresponds to the difference, and at the moment, the air circulation in the vehicle is set in an internal and external circulation mixed mode. When the difference between the temperature of the inner side surface of the glass and the dew point temperature is more than 6 ℃, the opening degree of the air door is 100%, and the air circulation in the vehicle is completely set in an external circulation mode. In fig. 2, point a represents the lower limit of the fogging threshold, and point b represents the upper limit of the fogging threshold, and in this embodiment, point a is 2 ℃ and point b is 6 ℃. In other embodiments, the specific values of a and b may be determined by real-time testing.
104. If the predicted value is not larger than the fogging threshold value, the air circulation in the vehicle is maintained in the internal circulation mode, and the internal circulation duration time is timed. Taking the example shown in fig. 2 as an example, if the difference between the temperature of the inner surface of the glass and the dew point temperature is less than 2 ℃, it is determined that the risk of fogging is low, the mode of the internal circulation is maintained, and the duration T of the internal circulation is counted.
105. If the time counted by the inner loop does not reach the first time threshold t1, the operation returns to the fogging judgment step 102, and whether the fogging risk exists is judged again. If the predicted value is still not greater than the fogging threshold, the step 104 is continued to continue to maintain the inner loop and the inner loop continues to be timed continuously, i.e. the duration T of the inner loop continues to be accumulated. If the predicted value is larger than the fogging threshold value, the step 103 is performed, the air circulation in the vehicle is set in the external circulation mode, and the vehicle returns to the initial state after the defogging time interval t4 is operated in the external circulation mode. In step 103, the inner loop duration timer is cleared, that is, the duration T of the inner loop is cleared, and the duration T is restarted at the next inner loop.
106. And when the time of the continuous timing of the internal circulation reaches a first time threshold t1, performing an air quality judgment step and checking the air quality outside the vehicle. The air quality outside the vehicle is detected by an outside air quality sensor that detects an outside air index such as the concentration of PM2.5 or the like.
107. If the outside air quality meets a specified criterion, such as the concentration of PM2.5 is below a set value, the inside air circulation is set to the outside circulation mode, i.e. the damper is opened, and the outside circulation mode is operated for a ventilation time interval t2 and then returns to the initial state. And meanwhile, clearing the internal circulation duration timing, namely clearing the duration T of the internal circulation, wherein the duration T can restart timing when the internal circulation is performed next time.
If the quality of the air outside the vehicle does not meet specified standards, such as the concentration of PM2.5 is too high or other pollutants are detected, the air circulation setting inside the vehicle is maintained in an internal circulation mode, and the internal circulation continuous timing is continuously carried out, namely the duration T of the internal circulation is continuously accumulated.
Fig. 3 discloses a timing sequence of the outer circulation ventilation after reaching the first time threshold in the control scheme of the air quality in the vehicle according to an embodiment of the invention. After the duration T of the inner cycle reaches the first time threshold T1, the outside air quality is determined, and when the outside air quality reaches a standard, the ventilation time interval T2 is operated in the outer cycle mode to perform ventilation.
108. If the time of the internal cycle continuous timing does not reach the second time threshold t3, returning to the fogging judgment step 102, and judging whether the fogging risk exists again. If the predicted value is still not greater than the fogging threshold, the step 104 is continued to continue to maintain the inner loop and the inner loop continues to be timed continuously, i.e. the duration T of the inner loop continues to be accumulated. Since the duration T is continuously accumulated, the duration T is greater than the first time threshold T1, so step 106 is performed, and after step 107 is performed, if the inner loop is still maintained, step 108 is performed again, and it is determined again whether the inner loop duration T reaches the second time threshold T3. In one embodiment, the second time threshold t3 is greater than the first time threshold t 1. During this cycle, if the predicted value determined in the fogging determination step is greater than the fogging threshold, then the process proceeds to step 103, where the in-vehicle air cycle is set to the external cycle mode, and returns to the initial state after operating in the external cycle mode for the defogging interval t 4. In step 103, the inner loop duration timer is cleared, that is, the duration T of the inner loop is cleared, and the duration T is restarted at the next inner loop. If it is always determined that there is no risk of fogging in the fogging determination step during the cycle, the state of the internal cycle is maintained and the duration T of the internal cycle continues to be accumulated.
109. And when the time of the internal circulation continuous timing reaches a second time threshold t3, the air circulation in the vehicle is set in the external circulation mode, namely the air door is opened, and the vehicle returns to the initial state after the external circulation mode runs for the ventilation time interval t 2. And meanwhile, clearing the internal circulation duration timing, namely clearing the duration T of the internal circulation, wherein the duration T can restart timing when the internal circulation is performed next time. The second time threshold t3 is associated with the in-vehicle carbon dioxide concentration. When the duration of the internal cycle reaches t3, the concentration of carbon dioxide in the vehicle may reach a higher level due to lack of air circulation to the outside, causing discomfort to the occupant. Therefore, when the duration of the internal circulation reaches the second time threshold t3, the internal circulation is forcibly switched to the external circulation for a period of time, and the concentration of carbon dioxide in the vehicle is reduced by communicating with the outside air.
Fig. 4 discloses a timing process of performing the external circulation ventilation after reaching the second time threshold in the control scheme of the air quality in the vehicle according to an embodiment of the invention. After the duration T of the internal cycle reaches the first time threshold T1, the quality of the air outside the vehicle does not reach the standard, so the internal cycle is maintained to continue to operate until the duration T of the internal cycle reaches the second time threshold T3, and the ventilation time interval T2 is forced to operate in the external cycle mode for ventilation in order to reduce the concentration of the carbon dioxide in the vehicle. Since the second time threshold t3 is reached and the method is forced to switch to the outer loop for ventilation and then returns to the initial state after ventilation is completed, the method will complete a complete cycle within the time period of t 3.
The aforementioned first time threshold t1, second time threshold t3, defogging time interval t4, and ventilation time interval t2 are associated with the vehicle type. The specific values of the first time threshold t1, the second time threshold t3, the defogging time interval t4, and the ventilation time interval t2 may be determined through real vehicle testing.
Because the breadth of our country is wide, in winter in northern areas, the external temperature is very low, and under the condition that the external temperature is extremely low, the risk of frosting exists. Therefore, in order to control the air quality in the vehicle due to the extremely low temperature of the outside, the method further comprises the following steps:
and acquiring the temperature outside the vehicle, and setting and maintaining the air circulation inside the vehicle in an external circulation mode when the temperature outside the vehicle is lower than a defrosting threshold value. In one embodiment, the defrost threshold is-15 ℃. When the temperature outside the vehicle is lower than the defrosting threshold value, the external circulation mode is forcibly maintained to prevent frosting. The defrost threshold is a condition that deals with extreme air temperatures, is not a common condition, and will force the outer cycle to be used when the outside temperature is below the defrost threshold, so this step can be understood as a separately triggered step.
The control method for the air quality in the vehicle can calculate according to the factors of the air quality outside the vehicle, the fogging risk in the vehicle and the estimated carbon dioxide concentration, and utilizes the external circulation as much as possible on the premise of ensuring the air quality in the vehicle and preventing fogging so as to control the carbon dioxide concentration in the vehicle to be at a more appropriate level and improve the use comfort of a driver and passengers. The method for controlling the air quality in the vehicle mainly updates the control logic, does not increase extra hardware, does not influence the use habit of a user, and has low implementation cost and obvious effect.
The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept, so that the scope of protection of the invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.

Claims (7)

1. A method for controlling the quality of air in a vehicle is characterized by comprising the following steps:
in the initial state, the air in the vehicle is circularly set in an internal circulation mode;
a fogging judgment step of calculating a predicted value of fogging in the vehicle;
if the predicted value is larger than the fogging threshold value, the air in the vehicle is circularly set in an external circulation mode, and the vehicle returns to the initial state after running the demisting time interval;
if the predicted value is not greater than the fogging threshold value, the air circulation in the vehicle is maintained in an inner circulation mode, and the inner circulation duration time is timed;
if the predicted value is not greater than the fogging threshold value, continuously timing the internal circulation, and resetting the internal circulation continuous timing if the predicted value is greater than the fogging threshold value;
when the time of continuous timing of the internal circulation reaches a first time threshold, carrying out an air quality judgment step to check the air quality outside the vehicle;
if the quality of the air outside the vehicle meets the specified standard, the air inside the vehicle is circulated and set in an external circulation mode, the vehicle returns to the initial state after running the ventilation time interval, and the internal circulation continuous timing is cleared;
if the quality of the air outside the automobile does not meet the specified standard, the air circulation setting inside the automobile is maintained in an internal circulation mode, and the internal circulation is continuously timed and continuously carried out;
if the predicted value is not greater than the fogging threshold value, continuously timing the internal circulation, and resetting the internal circulation continuous timing if the predicted value is greater than the fogging threshold value;
and when the time of the internal circulation continuous timing reaches a second time threshold, setting the air circulation in the vehicle in an external circulation mode, returning to the initial state after running the ventilation time interval, and resetting the internal circulation continuous timing.
2. The method for controlling air quality in a vehicle according to claim 1, wherein the predicted value of the in-vehicle fogging is calculated from a glass temperature, an in-vehicle temperature, and an in-vehicle humidity; wherein
Calculating the dew point temperature in the vehicle according to the temperature in the vehicle and the humidity in the vehicle;
and acquiring the temperature of the inner side surface of the glass, and calculating the difference between the temperature of the inner side surface of the glass and the dew point temperature, wherein the difference is used as a predicted value of the in-vehicle fogging.
3. The method of controlling air quality in a vehicle according to claim 2, wherein the fogging threshold is a range, the air circulation in the vehicle is completely set in the inner circulation mode when the predicted value is lower than a lower limit of the fogging threshold, the air circulation in the vehicle is set in the inner and outer circulation mixed mode when the predicted value is between the lower limit and an upper limit of the fogging threshold, a ratio of the inner circulation to the outer circulation is correlated with the predicted value, and the air circulation in the vehicle is completely set in the outer circulation mode when the predicted value is higher than the upper limit of the fogging threshold.
4. The method for controlling the quality of air in a vehicle according to claim 1, further comprising:
and acquiring the temperature outside the vehicle, and setting and maintaining the air circulation inside the vehicle in an external circulation mode when the temperature outside the vehicle is lower than a defrosting threshold value.
5. The method of claim 1, wherein the second time threshold is associated with an in-vehicle carbon dioxide concentration.
6. The method of claim 1, wherein the second time threshold is greater than the first time threshold.
7. The method of claim 1, wherein the first time threshold, the second time threshold, the defogging time interval, and the ventilation time interval are associated with a vehicle type.
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CN112109522B (en) * 2020-09-25 2022-01-18 北京新能源汽车股份有限公司 Control method, electric vehicle, and storage medium
CN113799573A (en) * 2021-09-16 2021-12-17 深圳市元征科技股份有限公司 Vehicle air circulation mode setting method and device and electronic equipment
CN114475523A (en) * 2022-02-24 2022-05-13 重庆长安新能源汽车科技有限公司 Automatic defogging control method and system, vehicle and storage medium
CN115871418A (en) * 2023-01-29 2023-03-31 深圳市科莱德电子有限公司 Vehicle-mounted solar cooling method and device and computer readable storage medium

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