CN112428779A - Control method and device of vehicle air conditioning system - Google Patents
Control method and device of vehicle air conditioning system Download PDFInfo
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- CN112428779A CN112428779A CN202011307998.1A CN202011307998A CN112428779A CN 112428779 A CN112428779 A CN 112428779A CN 202011307998 A CN202011307998 A CN 202011307998A CN 112428779 A CN112428779 A CN 112428779A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 68
- 239000005357 flat glass Substances 0.000 claims abstract description 105
- 238000011217 control strategy Methods 0.000 claims abstract description 96
- 230000007246 mechanism Effects 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims description 39
- 238000010257 thawing Methods 0.000 claims description 22
- 238000005057 refrigeration Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000007791 dehumidification Methods 0.000 claims description 4
- 238000013486 operation strategy Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 269
- 238000010586 diagram Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 239000012080 ambient air Substances 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00785—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models by the detection of humidity or frost
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00792—Arrangement of detectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00807—Control 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/06—Rear-view mirror arrangements mounted on vehicle exterior
- B60R1/0602—Rear-view mirror arrangements mounted on vehicle exterior comprising means for cleaning or deicing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/023—Cleaning windscreens, windows or optical devices including defroster or demisting means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Multimedia (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The application provides a control method and a device of an air conditioning system for a vehicle, wherein the method comprises the following steps: obtaining the temperature and humidity of air in the vehicle, and determining the dew point temperature according to the temperature and humidity of the air in the vehicle; acquiring the temperature of the vehicle window glass; calculating a temperature difference between the dew point temperature and the temperature of the window glass, and determining a fogging possibility level according to the temperature difference, wherein the fogging possibility level represents the possibility degree that water vapor in air in the vehicle is precipitated and attached to the window glass; controlling an actuating mechanism of the air conditioning system to execute a corresponding control strategy according to the fogging possibility level; different fogging likelihood levels correspond to different control strategies. When the temperature difference between the window glass and the dew point is large, the air conditioning mechanism executes a corresponding moderate control strategy, and performs moderate temperature and humidity adjustment operation on air in the vehicle. Because of adopting the operation strategy of comparatively moderate humiture, can improve the travelling comfort of driver and crew.
Description
Technical Field
The application relates to the technical field of vehicle air conditioners, in particular to a control method and device of a vehicle air conditioning system.
Background
In order to meet application requirements, air conditioning systems are installed in vehicles. In practical applications, the functions of the air conditioning system include the following (1) and (2).
(1) The temperature of the air in the vehicle compartment is adjusted to a state as comfortable as possible for the occupant, such as adjusting the temperature, the air flow rate, and the flow direction of the air in the vehicle compartment.
(2) When the problem that influences windshield transparency such as fog frost appears on the window glass surface (that is to say influence the perception of driver and crew or camera in the car to environment outside the window), open defrosting defogging mode and get rid of frost fog, guarantee then that windshield transparency specifically is: when the condition that the windshield is fogged is detected to be about to be established or just established, the defrosting mode is forcibly started, and dry hot air is adopted to blow the windshield to prevent the windshield from being fogged.
At present, when the automatic air conditioner for the vehicle is used, the fog is quickly removed only by adjusting the temperature of a compartment and the flow direction of air flow and starting a defogging strategy, and the requirements of personnel in the vehicle cannot be met; and the forced defrosting mode adopted when the defogging strategy is started can also cause serious influence on the riding experience of drivers and passengers.
Disclosure of Invention
In order to solve the technical problems described above or at least partially solve the technical problems, the present application provides a control method and apparatus for an air conditioning system for a vehicle.
In one aspect, the present application provides a method for controlling an air conditioning system for a vehicle, including:
obtaining the temperature and the humidity of air in a vehicle, and determining the dew point temperature according to the temperature and the humidity of the air in the vehicle;
acquiring the temperature of the vehicle window glass;
calculating a temperature difference value between the dew point temperature and the temperature of the window glass, and determining a fogging possibility level according to the temperature difference value, wherein the fogging possibility level represents the possibility degree that water vapor in air in the vehicle is precipitated and attached to the window glass;
controlling an actuating mechanism of the air conditioning system to execute a corresponding control strategy according to the fogging possibility level; different fogging likelihood levels correspond to different control strategies.
Optionally, the fogging likelihood level comprises a first likelihood level, the second likelihood level, and a third likelihood level;
the control strategy corresponding to the first possibility level is to adjust the humidity of air in the vehicle;
the control strategy corresponding to the second possibility level is to adjust the humidity of the air at the window glass;
the control strategy corresponding to the third possibility level is to adjust the humidity of the air at the window glass and heat the window glass.
Optionally, the adjusting the humidity of the air in the vehicle includes: drying the air in the vehicle;
the adjusting the humidity of the air at the window glass includes: drying the air in the vehicle, and opening a defrosting air door to blow the dried air to the window glass;
the humidity of the air at the position of the vehicle window glass is adjusted, and the vehicle window glass is heated: drying the air in the vehicle and heating the dried air, and opening the defroster damper to blow the heated air toward the window glass.
Optionally, the air inside the drying vehicle comprises:
the air in the vehicle is dried by adopting a dehumidification mode of a refrigeration mechanism.
Optionally, the air inside the drying vehicle comprises:
judging whether the air humidity outside the vehicle is smaller than the air humidity inside the vehicle;
if so, the circulating air door is opened to a set opening degree, and the air in the vehicle is dried in a mode of introducing external drying air flow.
Optionally, in a case that the fogging possibility level is the first possibility level or the second possibility level, the method further includes:
judging whether the temperature of the dried air is lower than a set temperature or not;
and if so, heating the dried air.
Optionally, in a case where the fogging possibility level is a third possibility level and the air-conditioning control mode is switched to the manual control mode, the method further includes:
judging whether the received manual control instruction is an air outlet mode adjusting instruction or not;
if not, ignoring the manual control instruction;
and if so, adjusting other air outlet air doors except the defrosting air door according to the manual control instruction.
Optionally, the temperature difference value corresponding to the first likelihood level is greater than the temperature difference value corresponding to the second likelihood level, and the temperature difference value corresponding to the second likelihood level is greater than the temperature difference value corresponding to the third likelihood level.
Optionally, controlling an actuator in the air conditioning system to execute a corresponding control strategy according to the fogging possibility level includes:
and controlling the actuating mechanism to execute a corresponding control strategy at least for a preset time according to the fogging possibility level.
In another aspect, the present application provides a control device of an air conditioning system for a vehicle, including:
the device comprises a parameter acquisition unit, a parameter calculation unit and a parameter calculation unit, wherein the parameter acquisition unit is used for acquiring the temperature and the humidity of air in the vehicle, determining the dew point temperature according to the temperature and the humidity of the air in the vehicle and acquiring the temperature of window glass;
the fogging possibility determining unit is used for calculating a temperature difference value between the dew point temperature and the temperature of the window glass, and determining a fogging possibility level according to the temperature difference value, wherein the fogging possibility level represents the possibility degree that water vapor in air in the vehicle is precipitated and attached to the window glass;
the strategy selection unit is used for controlling the air conditioning system to execute a corresponding control strategy according to the fogging possibility level; different fogging likelihood levels correspond to different control strategies.
Optionally, the fogging likelihood level comprises a first likelihood level, the second likelihood level, and a third likelihood level;
the control strategy corresponding to the first possibility level is to adjust the humidity of air in the vehicle;
the control strategy corresponding to the second possibility level is to adjust the humidity of the air at the window glass;
the control strategy corresponding to the third possibility level is to adjust the humidity of the air at the window glass and heat the window glass.
Optionally, the adjusting the humidity of the air in the vehicle includes: drying the air in the vehicle;
the adjusting the humidity of the air at the window glass includes: drying the air in the vehicle, and opening a defrosting air door to blow the dried air to the window glass;
the humidity of the air at the position of the vehicle window glass is adjusted, and the vehicle window glass is heated: drying the air in the vehicle and heating the dried air, and opening the defroster damper to blow the heated air toward the window glass.
In another aspect, the present application provides an air conditioning system for a vehicle, including an in-vehicle temperature sensor, an in-vehicle humidity sensor, an out-vehicle temperature sensor, a controller, and an actuator;
the controller is configured to: and executing the method according to the in-vehicle temperature signal generated by the in-vehicle temperature sensor, the in-vehicle humidity signal generated by the in-vehicle humidity sensor and the window temperature signal generated by the window temperature sensor, and controlling the execution mechanism to execute the corresponding control strategy.
In yet another aspect, the present application provides a vehicle including an automotive air conditioning system as described above.
According to the air conditioning system control method, different fogging possibility levels are set according to different temperature difference intervals, different air conditioning execution mechanism control strategies are set for all the fogging possibility levels, and the lower fogging possibility levels correspond to the mild air conditioning execution mechanism control strategies. Therefore, when the temperature of the window glass and the dew point temperature are greatly different, the air conditioning mechanism executes a corresponding moderate control strategy, performs moderate temperature and humidity adjustment operation on air in the vehicle, meets the requirement of personnel in the vehicle, and can prevent the window glass from fogging as soon as possible. Because a milder temperature and humidity control strategy is adopted, the comfort of drivers and passengers can be improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of an air supply mode control structure of an air conditioning system for a vehicle according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a control method of an air conditioning system for a vehicle according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a control device of an air conditioning system for a vehicle according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a controller for an air conditioner for a vehicle according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an air conditioning system for a vehicle according to an embodiment of the present application;
wherein: 01-air intake section, 011-in-vehicle circulation air intake, 012-out-vehicle circulation air intake, 013-circulation damper, 02-air treatment section, 021-blower, 022-evaporator, 023-cold and hot damper, 024-heater, 03-air distribution section, 031-defrosting damper, 032-middle damper, 033-lower damper; 11-a parameter acquisition unit, 12-a fogging possibility determination unit, 13-a strategy selection unit; 21-processor, 22-memory, 23-communication interface, 24-bus system; 31-an in-vehicle temperature sensor, 32-an in-vehicle humidity sensor, 33-a window glass temperature sensor, 34-a controller, 35-a refrigerating mechanism, 36-a heater, 37-a mode air door, 38-a defrosting air door and 39-a cold and hot air door.
Detailed Description
In order that the above-mentioned objects, features and advantages of the present application may be more clearly understood, the solution of the present application will be further described below. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein; it is to be understood that the embodiments described in this specification are only some embodiments of the present application and not all embodiments.
The embodiment of the application provides a control method of an air conditioning system for a vehicle, wherein the fogging possibility level is determined by the temperature and the humidity of air in the vehicle and the temperature of a windshield, and then a corresponding air conditioning control strategy is selected according to the fogging possibility level.
To facilitate understanding of the control strategy described below, a description will first be given of a blowing mode control mechanism of a vehicle air conditioning system. Fig. 1 is a schematic diagram of a control structure of an air supply mode of a vehicle air conditioning system according to an embodiment of the present application. As shown in fig. 1, the blowing mode control mechanism of the air conditioning system for a vehicle includes an air intake section 01, an air treatment section 02, and an air distribution section 03.
The air intake section 01 includes an in-vehicle circulation intake 011, an out-vehicle circulation intake 012, and a circulation damper 013. The circulation damper 013 is used to control the opening degrees of the internal circulation intake 011 and the external circulation intake 012 so as to adjust the ratio of the internal air and the external air entering the air treatment section 02. In practical applications, there may be 1 circulation damper 013 (1 circulation damper 013 controls both the inner circulation intake 011 and the outer circulation intake 012), or 2 circulation dampers (one circulation damper 013 controls both the inner circulation intake 011 and the outer circulation intake 012).
In the embodiment of the present application, the opening of the circulation damper 013 means that the circulation damper 013 is located between the vehicle interior circulation intake 011 and the vehicle exterior circulation intake 012, and the vehicle interior circulation intake 011 and the vehicle exterior circulation intake 012 are both opened by the set opening. In practical applications, the air inlet section 01 may further be provided with an air conditioning filter (not shown) to filter the circulating air.
The air treatment section 02 serves to effect treatment of the incoming circulating air. As shown in fig. 1, the air treatment section 02 includes a blower 021, an evaporator 022, a cold and hot damper 023, and a heater 024.
The heater 024 is used for heating the airflow passing through the heater to increase the temperature of the airflow; in practice, if the vehicle is a fuel-fired vehicle, the heater 024 may be a warm air tank to achieve heating of ambient air using high temperature engine coolant. In the case where the vehicle is a pure electric vehicle, the heater 024 may be a resistive heater 024.
The cold and hot damper 023 can adjust the amount of air flow blown to the heater 024, thereby realizing the adjustment of the air flow temperature.
The air distribution section 03 serves to distribute the air flow after treatment in the air treatment section 02. Conventionally, the air distribution section 03 includes a defrost damper 031 (i.e., an upper damper), a middle damper 032, and a lower damper 033. When the defrosting damper 031 is opened, the treated air flow blows toward the window glass; when the middle air door 032 is opened, the treated air is blown to the upper body or the adjacent area of people in the vehicle; when the lower damper 033 is opened, the treated air is blown toward the lower body or the vicinity of the vehicle occupant.
In addition to the components shown in fig. 1 and described above, the vehicle air conditioning system referred to in the embodiments of the present application includes various possible sensors and controllers; the sensor may include: a temperature sensor for detecting the temperature of evaporator 022, a temperature sensor for detecting the temperature outside the vehicle, a humidity sensor for detecting the humidity of the air outside the vehicle, a temperature sensor for detecting the temperature of the air inside the vehicle, and a humidity sensor for detecting the humidity of the air inside the vehicle. Various sensors are connected with the controller and used for outputting detection signals to the controller; the controller may determine a control strategy of the air conditioning system based on the detection signal generated by the sensor and control a corresponding actuator action.
Fig. 2 is a flowchart of a control method of an automotive air conditioning system according to an embodiment of the present application. The control method shown in fig. 2 is an anti-fogging control strategy that is formulated for possible fogging of a vehicle windshield. As shown in fig. 2, the method provided by the embodiment of the present application includes steps S101 to S103.
S101: obtaining the temperature and humidity of air in the vehicle, and determining the dew point temperature according to the temperature and humidity of the air in the vehicle; and acquiring the temperature of the vehicle window glass.
The air temperature and the air humidity in the vehicle are obtained according to signals of a temperature sensor and a humidity sensor which are arranged in the vehicle; in the embodiment of the application, the temperature sensor and the humidity sensor which are arranged in the vehicle are preferably arranged at the position close to the windshield of the vehicle, so that the temperature and humidity of the air close to the windshield can be accurately determined.
The dew point temperature is calculated according to the air temperature in the vehicle and the air humidity in the vehicle, the air temperature in the vehicle and the air humidity in the vehicle are brought into a related formula to calculate the dew point temperature, or the dew point temperature is obtained by a table look-up method. The dew point temperature is the temperature at which the moisture content of the air remains constant, such that the air cooling reaches saturation; in the vicinity of the dew point temperature, water vapor in the air can be separated out and attached to the surface of a low-temperature object; in a vehicle, water vapor in the air is precipitated and attached to a window glass to form mist.
In the embodiment of the present application, the relevant formula for calculating the dew point temperature may be a goff-gray grid formula recommended by the world meteorological organization, may also be a marklas formula simplified according to the goff-gray grid formula, and may also be another empirical formula in the field of meteorology, and the embodiment of the present application is not particularly limited.
In the specific application of the embodiment of the application, the temperature of the car window glass is obtained according to the measuring signal of the temperature sensor arranged on the car window glass.
S102: and calculating the temperature difference between the dew point temperature and the temperature of the window glass, and determining the fogging possibility level according to the temperature difference.
The calculated difference between the dew point temperature and the window glass temperature referred to in the embodiments of the present application is a difference in the case where the window glass temperature is higher than the dew point temperature. It is conceivable that if the window temperature is below the dew point temperature, water vapor from the air located beside the window has condensed out and attached to the inside of the window to form a fog or water droplet, which is already heavily fogged, requiring aggressive defogging control strategies such as those mentioned in the background of the invention.
In the embodiment of the present application, the fogging possibility levels corresponding to different temperature difference values have been determined in advance. The fogging probability level is determined based on the temperature difference, and the corresponding fogging probability level is determined based on which fogging probability level the temperature difference falls within the temperature difference range.
S103: and controlling an air conditioner actuating mechanism to execute a corresponding control strategy according to the fogging possibility level.
In the embodiment of the application, different fogging possibility levels correspond to different air conditioner execution mechanism control strategies, and a lower fogging possibility level corresponds to a more moderate air conditioner execution mechanism control strategy.
Under the condition that the temperature of the window glass is higher than the dew point temperature, if the temperature difference between the temperature of the window glass and the dew point temperature is larger, the possibility that water drops are attached to the window glass to form fog is smaller; in the case of low possibility of fogging, the window glass can be prevented from fogging only by adopting a moderate control strategy, and even if the humidity of the air in the vehicle is increased, the window glass cannot be fogged.
According to the basic logic of the previous section, the air conditioning system control method provided by the embodiment of the application formulates different fogging possibility levels aiming at different temperature difference intervals, and formulates different air conditioning execution mechanism control strategies for each fogging possibility level.
Therefore, when the temperature of the window glass and the dew point temperature are greatly different, the air conditioning mechanism executes a corresponding moderate control strategy to perform moderate dehumidification operation on the air in the vehicle, so that the fogging phenomenon of the window glass can be prevented in advance, or the air in the vehicle can be humidified under the condition that the humidifying mechanism is arranged on the air conditioning mechanism; the method can meet the requirement of comfort of the driver and passengers and improve the comfort of the driver and passengers because a milder control strategy is adopted and/or more operation options are provided.
In a specific application of the embodiment of the present application, the fogging possibility level may be divided into three levels, and temperature difference intervals corresponding to different fogging possibility levels are determined. In particular, the three likelihood levels may be a first likelihood level, a second likelihood level, and a third likelihood level, the three likelihood levels separated by three temperature difference thresholds, the three temperature difference thresholds being a first threshold, a second threshold, and a third threshold, respectively, and the first threshold being greater than the second threshold.
Based on the foregoing fogging possibility level, in step S102, it is determined that the fogging possibility level can be classified into four cases according to the temperature difference; correspondingly, in the step S103, the corresponding air conditioner actuator control strategy is selected according to the possibility level and also correspondingly includes three strategies; the four fogging likelihood levels and corresponding control actuator control strategies are as follows 1-3, respectively.
1. If the temperature difference is greater than the first threshold, determining that the fogging likelihood level is the first likelihood level, in which case the selected anti-fogging control strategy is the first control strategy; the first control strategy is to adjust the humidity of the air in the vehicle. In a specific application of the embodiment of the application, the method for adjusting the humidity of the air in the vehicle to dry the air in the vehicle for drying the air in the vehicle may include the following two methods.
(1) And starting the refrigerating mechanism, and drying the air in the vehicle by adopting the initial mode of the refrigerating mechanism.
In practical application, if the compressor is not under low-temperature protection, the starting signal of the refrigeration mechanism can be used for starting the refrigeration mechanism to work; when the refrigerating mechanism works, the refrigerant flows into the evaporator and absorbs heat to be gasified, so that the temperature of airflow flowing around the refrigerant is reduced to be lower than the dew point temperature; because the air flow is cooled to the temperature below the dew point temperature, water vapor in the air flow is condensed and separated out and is attached to the surface of the evaporator or adjacent components, and the air in the vehicle is dried.
(2) Judging whether the air humidity outside the vehicle is smaller than the air humidity inside the vehicle; if so, the circulating air door is opened to a set opening degree, and the air in the vehicle is dried in a mode of introducing external dry air flow.
In practical application, the refrigerating mechanism needs to work for a certain preparation time before receiving a starting signal and completely working, and the possibility of fogging in the time is possibly advanced to the next stage, so that the control strategy of the air conditioning mechanism is more aggressive and the feeling of drivers and passengers is reduced; or the air conditioner is in a low-temperature protection state and cannot be started. In order to avoid this problem, the circulation damper may be opened to a set opening degree while the refrigeration mechanism activation signal is generated, so as to dry the air in the vehicle by introducing the outside dry air.
It should be noted that the humidity of the outside air at this time should be less than the humidity of the air in the vehicle; in a specific application, whether the circulating air door can be opened to a set opening degree or not while a refrigerating mechanism starting signal is generated needs to be determined according to an air humidity signal generated by an external humidity sensor.
In practical applications, in the case that the fogging possibility level is the first possibility level, the method may further include: judging whether the temperature of the dried air is lower than a set temperature or not; if so, the dried air is heated.
For example, in a high-temperature environment in summer, the temperature of air in a vehicle can be lowered to maintain the temperature of the air within a set temperature range as much as possible, and at the moment, after a first control strategy is adopted, the air is cooled in the process of drying the air to meet the set temperature requirement. In winter, in low-temperature environment, the temperature in the vehicle can be reduced by adopting a refrigeration mechanism or introducing an external drying airflow mode to dry the air in the vehicle, so that the dried air can be heated by starting the heater.
When the external air is introduced by opening the circulation damper, the set opening degree can be determined according to the humidity of the air in the vehicle, and can be dynamically adjusted according to the change of the humidity of the air in the vehicle.
2. Determining a fogging likelihood level as a second likelihood level if the temperature difference is between the first threshold value and the second threshold value; the corresponding air conditioner actuator control strategy is a second control strategy, and the second control strategy comprises the step of adjusting the humidity of the air at the window glass.
In the embodiment of the present application, adjusting the humidity of the air at the window glass may include drying the air in the vehicle, and opening a defrost damper to blow the dried air toward the window glass.
The method of drying the air in the vehicle in the second control strategy is identical to the possible method of drying the air in the vehicle in the first control strategy and will not be repeated here. And the defrosting air door is opened to guide a small part of dry air in the vehicle to blow towards the window glass.
In practical applications, in the case that the fogging possibility level is the second possibility level, the method may further include: judging whether the temperature of the dried air is lower than a set temperature or not; if so, the dried air is heated. In the first and second control strategies described above, the blower may be controlled to a lower wind speed range to minimize airflow noise and thus reduce the impact on the occupants.
3. If the temperature difference is less than the second threshold, the fogging likelihood level is determined to be a third likelihood level, in which case the selected anti-fogging control strategy is the third control strategy. The third control strategy is to adjust the humidity of the air at the window glass and heat the window glass.
In the embodiment of the present application, the humidity of the air at the position of the window glass may be adjusted by: drying the air in the vehicle and heating the dried air, and opening the defroster damper to blow the heated air toward the window glass.
The method of drying the air in the vehicle in the third control strategy is identical to the possible method of drying the air in the vehicle in the first control strategy and will not be repeated here.
The third control strategy is to heat the air in the vehicle by starting the heater and adjusting the cold and hot air doors to blow at least part of the air flow to the heater.
In practical applications, when the third control strategy is executed, the blower can be controlled to work at a larger wind speed gear so as to rapidly dry air by blowing with strong force and heat the window glass to avoid the fogging problem.
In a specific application, when the fogging possibility is at the third possibility level, the window glass may be in a state of greater risk of fogging or already fogging, but driving is still not affected at this time. At this time, the driver or passenger may feel that the air conditioning system affects himself or herself, and switch the air conditioning control mode from the automatic control mode to the manual control mode, and input an instruction for adjusting the execution state of the air conditioning system. However, the manual control command input by the user may affect the defogging operation, and fog affecting the observation of the road condition outside the automobile is quickly formed on the window glass.
In order to avoid the problem that fog can be quickly formed on the vehicle window due to the intervention of a user in operating the control actuator, the method provided by the embodiment of the application further executes the steps S201-S203 when the fogging possibility level is the third level.
S201: judging whether the manual control instruction is an air outlet mode adjusting instruction or not under the condition that the fogging possibility level is a third possibility level and the air conditioner control mode is switched to the manual control mode; if yes, go to S202; if not, go to S203.
S202: and adjusting other air outlet air doors except the defrosting air door according to the manual control instruction.
S203: the manual control command is ignored.
As shown in steps S202 and S203, if the manual control instruction input by the user is an air-out mode adjustment instruction, under the condition that it is ensured that the defrosting damper is still opened, adjusting other air-out dampers according to the manual control instruction, for example, closing or opening other middle dampers and lower dampers; and if the manual control instruction is a control instruction for other execution mechanisms, ignoring the manual control instruction, and still maintaining the execution states of the other execution mechanisms to ensure the defogging effect.
That is, in the case where the possibility of fogging is the third possibility level, forced control is made for, for example, the cooling mechanism, the blower, the heater, the defrosting damper, the mode damper, and the like, and only the other dampers except for the defrosting damper can be freely selected by the user.
It should be noted that, when the first execution strategy, the second execution strategy and the third execution strategy are executed, the minimum operation time of the corresponding execution mechanism is set, so as to avoid the problem that the execution mechanism is frequently started and stopped due to the fact that a plurality of different fogging possibility levels are determined in a short time.
In the air conditioner control method provided by the embodiment of the application, control strategies corresponding to a first possibility level, a second possibility level and a third possibility level are respectively set; in other embodiment applications of the present application, the three-possibility-identified air conditioning control strategy may also be modified into other types of control strategies.
In addition to the foregoing method for controlling an air conditioning system for a vehicle, an embodiment of the present application further provides a control device for an air conditioning system for a vehicle.
Fig. 3 is a schematic structural diagram of a control device of a vehicle air-conditioning system according to an embodiment of the present application. As shown in fig. 3, the vehicle air conditioner control device provided in the embodiment of the present application includes a parameter acquisition unit 11, a fogging possibility determination unit 12, and a policy selection unit 13.
The parameter obtaining unit 11 is used for obtaining the air temperature and the air humidity in the vehicle, and determining the dew point temperature according to the air temperature and the air humidity in the vehicle; and acquiring the temperature of the vehicle window glass.
The air temperature and the air humidity in the vehicle are obtained according to signals of a temperature sensor and a humidity sensor which are arranged in the vehicle; in the embodiment of the application, the temperature sensor and the humidity sensor which are arranged in the automobile are preferably arranged at the positions close to the window glass of the automobile, so that the temperature and humidity condition of the air close to the window glass can be accurately determined.
The dew point temperature is calculated according to the air temperature in the vehicle and the air humidity in the vehicle, the air temperature in the vehicle and the air humidity in the vehicle are brought into a related formula to calculate the dew point temperature, or the dew point temperature is obtained by a table look-up method.
In the embodiment of the present application, the relevant formula for calculating the dew point temperature may be a goff-gray grid formula recommended by the world meteorological organization, may also be a marklas formula simplified according to the goff-gray grid formula, and may also be another empirical formula in the field of meteorology, and the embodiment of the present application is not particularly limited.
In the specific application of the embodiment of the application, the temperature of the car window glass is obtained according to the measuring signal of the temperature sensor arranged on the car window glass.
The fogging possibility determination unit 12 is used for calculating a temperature difference between the dew point temperature and the window glass temperature, and determining a fogging possibility level according to the temperature difference; the fogging possibility level indicates the degree of possibility that water vapor in the air in the vehicle is precipitated and attached to the window glass. The fogging possibility levels corresponding to the different temperature differences are predetermined.
The calculated difference between the dew point temperature and the window glass temperature referred to in the embodiments of the present application is a difference in the case where the window glass temperature is higher than the dew point temperature. It is conceivable that if the window temperature is below the dew point temperature, water vapor from the air located beside the window has condensed out and attached to the inside of the window to form a fog or water droplet, which is already heavily fogged, requiring aggressive defogging control strategies such as those mentioned in the background of the invention.
In the embodiment of the present application, the fogging possibility levels corresponding to different temperature difference values have been determined in advance. The fogging probability level is determined based on the temperature difference, and the corresponding fogging probability level is determined based on which fogging probability level the temperature difference falls within the temperature difference range.
The strategy selection unit 13 is used for selecting a corresponding air conditioner actuator control strategy according to the fogging possibility level; different fogging likelihood levels correspond to different air conditioner actuator control strategies, and lower fogging likelihood levels correspond to more moderate air conditioner actuator control strategies.
Under the condition that the temperature of the window glass is higher than the dew point temperature, if the temperature difference between the temperature of the window glass and the dew point temperature is larger, the possibility that water drops are attached to the window glass to form fog is smaller; in the case of low possibility of fogging, the window glass can be prevented from fogging only by adopting a moderate control strategy, and even if the humidity of the air in the vehicle is increased, the window glass cannot be fogged.
According to the basic logic of the previous section, the air conditioning system control device provided by the embodiment of the application formulates different fogging possibility levels aiming at different temperature difference intervals, and formulates different air conditioning execution mechanism control strategies for each fogging possibility level.
Therefore, when the temperature of the window glass and the dew point temperature are greatly different, the air conditioning mechanism executes a corresponding moderate control strategy to perform moderate dehumidification operation on the air in the vehicle, so that the fogging phenomenon of the window glass can be prevented in advance, or teacher operation can be performed on the air in the vehicle under the condition that the humidifying mechanism is configured on the air conditioning mechanism; the method can meet the requirement of comfort of the driver and passengers and improve the comfort of the driver and passengers because a milder control strategy is adopted and/or more operation options are provided.
In a specific application of the embodiment of the present application, the fogging possibility level may be divided into three levels, and temperature difference intervals corresponding to different fogging possibility levels are determined. In particular, the three likelihood levels may be a first likelihood level, a second likelihood level, and a third likelihood level, the three likelihood levels separated by three temperature difference thresholds, the three temperature difference thresholds being a first threshold, a second threshold, and a third threshold, respectively, and the first threshold being greater than the second threshold.
2. Case where the temperature difference is greater than the first threshold value
If the temperature difference is greater than the first threshold value, the fogging possibility determination unit 12 determines that the fogging possibility level is the first possibility level, in which case the selected anti-fogging control policy is the first control policy; the first control strategy is to adjust the humidity of the air in the vehicle.
In a specific application of the embodiment of the application, the method for adjusting the humidity of the air in the vehicle to dry the air in the vehicle for drying the air in the vehicle may include the following two methods.
In a specific application of the embodiment of the application, the method for adjusting the humidity of the air in the vehicle to dry the air in the vehicle for drying the air in the vehicle may include the following two methods.
(1) And starting the refrigerating mechanism, and drying the air in the vehicle by adopting the initial mode of the refrigerating mechanism. In practical application, if the compressor is not under low-temperature protection, the starting signal of the refrigeration mechanism can be used for starting the refrigeration mechanism to work; when the refrigerating mechanism works, the refrigerant flows into the evaporator and absorbs heat to be gasified, so that the temperature of airflow flowing around the refrigerant is reduced to be lower than the dew point temperature; because the air flow is cooled to the temperature below the dew point temperature, water vapor in the air flow is condensed and separated out and is attached to the surface of the evaporator or adjacent components, and the air in the vehicle is dried.
(2) Judging whether the air humidity outside the vehicle is smaller than the air humidity inside the vehicle; if so, the circulating air door is opened to a set opening degree, and the air in the vehicle is dried in a mode of introducing external dry air flow.
In practical application, if the refrigeration mechanism is not in a low-temperature protection state, the air in the vehicle can be dried by dehumidifying the air at the evaporator, and at the moment, even if the humidity of the air outside the vehicle is higher, the circulating air door can be opened to a set opening degree to introduce the outside air, and the outside air is dried through the evaporator. It is conceivable that the outside air is necessarily dry air because the cooling mechanism is in the low-temperature protection state, at which time the outside air temperature is necessarily low.
In practical application, the refrigeration mechanism needs to work for a certain preparation time before receiving the starting signal and completely working, and the possibility of fogging in the time may be advanced to the next stage, so that the control strategy of the air conditioning mechanism becomes more aggressive and the experience of drivers and passengers is reduced. In order to avoid this problem, the circulation damper may be opened to a set opening degree while the refrigeration mechanism activation signal is generated, so as to dry the air in the vehicle by introducing the outside dry air.
It should be noted that the humidity of the outside air at this time should be less than the humidity of the air in the vehicle; in a specific application, whether the circulating air door can be opened to a set opening degree or not while a refrigerating mechanism starting signal is generated needs to be determined according to an air humidity signal generated by an external humidity sensor.
In practical applications, in the case that the fogging possibility level is the first possibility level, the method may further include: judging whether the temperature of the dried air is lower than a set temperature or not; if so, the dried air is heated.
For example, in a high-temperature environment in summer, the temperature of air in a vehicle can be lowered to maintain the temperature of the air within a set temperature range as much as possible, and at the moment, after a first control strategy is adopted, the air is cooled in the process of drying the air to meet the set temperature requirement. In winter, in low-temperature environment, the temperature in the vehicle can be reduced by adopting a refrigeration mechanism or introducing an external drying airflow mode to dry the air in the vehicle, so that the dried air can be heated by starting the heater.
When the external air is introduced by opening the circulation damper, the set opening degree can be determined according to the humidity of the air in the vehicle, and can be dynamically adjusted according to the change of the humidity of the air in the vehicle. 2. The temperature difference is between the first threshold and the second threshold
The fogging possibility determination unit 12 determines the fogging possibility level as a second possibility level if the temperature difference is between the first threshold value and the second threshold value; the control strategy selected by the corresponding strategy selection unit 13 is a second control strategy comprising adjusting the humidity of the air at the window pane.
In the embodiment of the present application, adjusting the humidity of the air at the window glass may include drying the air in the vehicle, and opening a defrost damper to blow the dried air toward the window glass.
The method of drying the air in the vehicle in the second control strategy is identical to the possible method of drying the air in the vehicle in the first control strategy and will not be repeated here. And the defrosting air door is opened to guide a small part of dry air in the vehicle to blow towards the window glass.
In the first and second control strategies described above, the blower may be controlled to a lower wind speed range to minimize airflow noise and thus reduce the impact on the occupants.
3. Case where the temperature difference is less than the second threshold value
The fogging possibility determination unit 12 determines the fogging possibility level as a third possibility level if the temperature difference is less than the second threshold value; correspondingly, the strategy selection unit 13 selects the third control strategy; the third control strategy is to adjust the humidity of the air at the window glass and heat the window glass.
In the embodiment of the present application, the humidity of the air at the position of the window glass may be adjusted by: : drying the air in the vehicle and heating the dried air, and opening the defroster damper to blow the heated air toward the window glass.
The method of drying the air in the vehicle in the third control strategy is identical to the possible method of drying the air in the vehicle in the first control strategy and will not be repeated here.
The third control strategy is to heat the air in the vehicle by starting the heater and adjusting the cold and hot air doors to blow at least part of the air flow to the heater.
In practical application, when the third control strategy is executed, the blower can be controlled to work at a larger wind speed gear so as to rapidly dry air by blowing with strong force and heat the window glass to avoid the fogging problem.
In a specific application, when the fogging possibility is at the third possibility level, the window glass may be in a state of greater risk of fogging or already fogging, but driving is still not affected at this time. At this time, the driver or passenger may feel that the air conditioning system affects himself or herself, and switch the air conditioning control mode from the automatic control mode to the manual control mode, and input an instruction for adjusting the execution state of the air conditioning system. However, the manual control command input by the user may affect the defogging operation, and fog affecting the observation of the road condition outside the automobile is quickly formed on the window glass.
In order to avoid the problem that fog may be rapidly formed on the vehicle window due to the intervention of a user in operating the control actuator, in the method provided by the embodiment of the application, when the fogging possibility level is the third level, the strategy selecting unit 13 further includes a judging subunit and an executing subunit.
The judging subunit is configured to judge whether the controlled control instruction is the air outlet mode adjustment instruction or not when the fogging possibility level is the third possibility level and the air-conditioning control mode is switched to the manual control mode.
The execution subunit is used for adjusting other air outlet doors except the defrosting air door according to the manual control instruction; and under the condition that the manual control instruction is not the air outlet mode adjustment instruction, ignoring the manual control instruction.
That is, in the case where the possibility of fogging is the third possibility level, the policy selecting unit 13 performs forced control of, for example, the cooling mechanism, the blower, the heater, the defrosting damper, the mode damper, and the like, and only controls other dampers except for the defrosting damper by the user's free choice.
It should be noted that, when the first execution strategy, the second execution strategy and the third execution strategy are executed, the minimum operation time of the corresponding execution mechanism is set, so as to avoid the problem that the execution mechanism is frequently started and stopped due to the fact that a plurality of different fogging possibility levels are determined in a short time.
It should also be noted that, after the control strategy of the corresponding air conditioner actuator is selected, the aforementioned control method and control device for the vehicle air conditioner generate an instruction for controlling the corresponding actuator to operate according to the corresponding control strategy, and issue the instruction to the corresponding actuator through the vehicle-mounted bus system to drive the actuator to operate.
In addition to providing the automatic control method of the vehicle air conditioner, the application also provides a controller of the vehicle air conditioner. Fig. 4 is a schematic structural diagram of a controller for an air conditioner for a vehicle according to an embodiment of the present application. As shown in fig. 4, the intelligent driving control system includes at least one processor 21, at least one memory 22, and at least one communication interface 23.
The memory 22 in this embodiment may be either volatile memory or nonvolatile memory, or a combination of the two. In some embodiments, memory 22 stores the following elements: executable units or data structures, or a subset thereof, or an expanded set thereof: an operating system and an application program. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic tasks and processing hardware-based tasks. And the application programs comprise application programs of various application tasks. The program for implementing the method for determining the vehicle dynamic parameter provided by the embodiment of the application may be included in the application program.
In the embodiment of the present application, the processor 21 executes the steps of the vehicle air conditioner control method by calling a program or an instruction (specifically, a program or an instruction stored in an application program) stored in the memory 22.
In the embodiment of the present application, the processor 21 may be a general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The steps of the control method for the vehicle air conditioner provided by the embodiment of the application can be directly embodied as the execution of a hardware decoding processor, or the execution of the hardware decoding processor and a software unit in the decoding processor is combined. The software elements may be located in ram, flash, rom, prom, or eprom, registers, among other storage media that are well known in the art. The storage medium is located in a memory 22, and the processor 21 reads the information in the memory 22 and performs the steps of the method in combination with its hardware.
The communication interface 23 is used for transmitting information between the controller and the external device, for example, to obtain signals generated by various sensors, and generate and transmit corresponding control strategy commands to the vehicle actuator.
The memory and processor components of the intelligent driving control system are coupled together by a bus system 24, and the bus system 24 is used to implement the connection communication between these components.
The embodiment of the application also provides an air conditioning system for the vehicle. Fig. 5 is a schematic structural diagram of an air conditioning system for a vehicle according to an embodiment of the present application. As shown in fig. 5, the vehicle air conditioning system includes a sensor, a controller 34, and an actuator. The sensors at least comprise an in-vehicle temperature sensor 31, an in-vehicle humidity sensor 32 and a window glass temperature sensor 33; the actuators include at least a refrigeration mechanism 36, a heater 37, a mode damper 38, and a defrost damper 39. As shown in fig. 5, the controller 34 is configured to generate an actuator control strategy by executing the aforementioned steps of the vehicle air conditioning system control method based on signals generated by the in-vehicle temperature sensor 31, the in-vehicle humidity sensor 32, and the out-vehicle temperature sensor, and to control at least one of the cooling mechanism 36, the heater 37, the mode damper 38, and the defrost damper 39 to operate according to the actuator control strategy using the actuator control strategy.
In addition, the embodiment of the application also provides a vehicle, and the vehicle comprises the vehicle-mounted air conditioning system. The vehicle provided by the embodiment of the application can be any one of a fuel vehicle, a hybrid vehicle, a pure electric vehicle or a range-extended electric operator; other parts of the structure of the vehicle provided by the embodiment of the application are referred to the related technical documents and are not described herein.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present application and are presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (15)
1. A control method of an air conditioning system for a vehicle, comprising:
obtaining the temperature and the humidity of air in a vehicle, and determining the dew point temperature according to the temperature and the humidity of the air in the vehicle;
acquiring the temperature of the vehicle window glass;
calculating a temperature difference value between the dew point temperature and the temperature of the window glass, and determining a fogging possibility level according to the temperature difference value, wherein the fogging possibility level represents the possibility degree that water vapor in air in the vehicle is precipitated and attached to the window glass;
controlling an actuating mechanism of the air conditioning system to execute a corresponding control strategy according to the fogging possibility level; different fogging likelihood levels correspond to different control strategies.
2. The control method of an air conditioning system for a vehicle according to claim 1, characterized in that:
the fogging likelihood levels include a first likelihood level, a second likelihood level, and a third likelihood level;
the control strategy corresponding to the first possibility level is to adjust the humidity of air in the vehicle;
the control strategy corresponding to the second possibility level is to adjust the humidity of the air at the window glass;
the control strategy corresponding to the third possibility level is to adjust the humidity of the air at the window glass and heat the window glass.
3. The control method of air conditioning system for vehicles according to claim 2,
the adjusting the humidity of the air in the vehicle comprises the following steps: drying the air in the vehicle;
the adjusting the humidity of the air at the window glass includes: drying the air in the vehicle, and opening a defrosting air door to blow the dried air to the window glass;
the humidity of the air at the position of the vehicle window glass is adjusted, and the vehicle window glass is heated: drying the air in the vehicle and heating the dried air, and opening the defroster damper to blow the heated air toward the window glass.
4. The control method of an air conditioning system for vehicles according to claim 3, wherein drying the air in the vehicle includes:
the air in the vehicle is dried by adopting a dehumidification mode of a refrigeration mechanism.
5. The control method of an air conditioning system for vehicles according to claim 3, wherein drying the air in the vehicle includes:
judging whether the air humidity outside the vehicle is smaller than the air humidity inside the vehicle;
if so, the circulating air door is opened to a set opening degree, and the air in the vehicle is dried in a mode of introducing external drying air flow.
6. The control method of a vehicle air conditioning system according to claim 4 or 5, characterized by further comprising, in the case where the fogging possibility level is the first possibility level or the second possibility level:
judging whether the temperature of the dried air is lower than a set temperature or not;
and if so, heating the dried air.
7. The control method of air conditioning system for vehicles according to claim 3,
when the fogging possibility level is a third possibility level and the air-conditioning control mode is switched to the manual control mode, the method further includes:
judging whether the received manual control instruction is an air outlet mode adjusting instruction or not;
if not, ignoring the manual control instruction;
and if so, adjusting other air outlet air doors except the defrosting air door according to the manual control instruction.
8. The control method of air conditioning system for vehicles according to any one of claims 2 to 5,
the temperature difference corresponding to the first likelihood level is greater than the temperature difference corresponding to the second likelihood level, and the temperature difference corresponding to the second likelihood level is greater than the temperature difference corresponding to the third likelihood level.
9. The control method of the vehicular air conditioning system according to any one of claims 1 to 4, wherein controlling an actuator in the air conditioning system to execute a corresponding control strategy according to the fogging possibility level includes:
and controlling the actuating mechanism to execute a corresponding control strategy at least for a preset time according to the fogging possibility level.
10. A control device for a vehicle air conditioning system, comprising:
the device comprises a parameter acquisition unit, a parameter calculation unit and a parameter calculation unit, wherein the parameter acquisition unit is used for acquiring the temperature and the humidity of air in the vehicle, determining the dew point temperature according to the temperature and the humidity of the air in the vehicle and acquiring the temperature of window glass;
the fogging possibility determining unit is used for calculating a temperature difference value between the dew point temperature and the temperature of the window glass, and determining a fogging possibility level according to the temperature difference value, wherein the fogging possibility level represents the possibility degree that water vapor in air in the vehicle is precipitated and attached to the window glass;
the strategy selection unit is used for controlling the air conditioning system to execute a corresponding control strategy according to the fogging possibility level; different fogging likelihood levels correspond to different control strategies.
11. The control device of a vehicle air conditioning system according to claim 10, characterized in that:
the fogging likelihood levels include a first likelihood level, a second likelihood level, and a third likelihood level;
the control strategy corresponding to the first possibility level is to adjust the humidity of air in the vehicle;
the control strategy corresponding to the second possibility level is to adjust the humidity of the air at the window glass;
the control strategy corresponding to the third possibility level is to adjust the humidity of the air at the window glass and heat the window glass.
12. The control device of air conditioning system for vehicles according to claim 11,
the adjusting the humidity of the air in the vehicle comprises the following steps: drying the air in the vehicle;
the adjusting the humidity of the air at the window glass includes: drying the air in the vehicle, and opening a defrosting air door to blow the dried air to the window glass;
the humidity of the air at the position of the vehicle window glass is adjusted, and the vehicle window glass is heated: drying the air in the vehicle and heating the dried air, and opening the defroster damper to blow the heated air toward the window glass.
13. The control device of air conditioning system for vehicles according to claim 12,
the policy selection unit is further configured to select the policy when the fogging possibility level is a third possibility level and the air-conditioning control mode is switched to the manual control mode
And under the condition that the received manual control instruction is judged to be an air outlet mode adjusting instruction, adjusting other air outlet air doors except the defrosting air door according to the manual control instruction.
14. An air conditioning system for a vehicle is characterized by comprising an in-vehicle temperature sensor, an in-vehicle humidity sensor, an out-vehicle temperature sensor, a controller and an actuating mechanism;
the controller is configured to: the method according to any one of claims 1 to 9 is executed according to an in-vehicle temperature signal generated by the in-vehicle temperature sensor, an in-vehicle humidity signal generated by the in-vehicle humidity sensor and a window temperature signal generated by the window temperature sensor, and the execution mechanism is controlled to execute a corresponding control strategy.
15. A vehicle characterized by comprising the vehicular air conditioning system according to claim 14.
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