CN114274736B - Anti-fog control method, device, equipment and storage medium for automobile air conditioner - Google Patents
Anti-fog control method, device, equipment and storage medium for automobile air conditioner Download PDFInfo
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- CN114274736B CN114274736B CN202210139969.1A CN202210139969A CN114274736B CN 114274736 B CN114274736 B CN 114274736B CN 202210139969 A CN202210139969 A CN 202210139969A CN 114274736 B CN114274736 B CN 114274736B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
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Abstract
The invention belongs to the technical field of automobile air conditioners, and discloses an anti-fog control method, device, equipment and storage medium for an automobile air conditioner, wherein the method comprises the following steps: determining a dew point temperature from an air temperature and an air humidity in the vicinity of the windshield; judging whether a fog risk exists according to the glass surface temperature of the windshield and the dew point temperature; if yes, determining a change rate of the risk of fogging according to the glass surface temperature and the dew point temperature; and determining different anti-fog programs according to the change rate of the fog risk and the difference value between the glass surface temperature and the dew point temperature, wherein the anti-fog programs are used for controlling an air outlet mode, air quantity and air outlet temperature. According to the temperature of the surface of the glass, the temperature and the humidity of air near the windshield, the risk of fog generation is determined, the anti-fog program of the air conditioner is automatically adjusted according to the change trend of the dew point temperature, the problem of abrupt starting/closing existing in the existing automatic anti-fog method is avoided, and good and safe driving experience is brought to a driver.
Description
Technical Field
The invention relates to the technical field of automobile air conditioners, in particular to an anti-fog control method, device, equipment and storage medium for an automobile air conditioner.
Background
The prior commercial vehicle air conditioning system is antifog, whether the window glass is fogged or not is mainly identified by naked eyes of a driver, and then the air conditioner is manually started for defrosting, so that the operation frequency of the driver is more, and the driving safety is influenced.
Disclosure of Invention
The invention aims to provide an anti-fog control method, device, equipment and storage medium for an automobile air conditioner, so as to solve the problem that the existing anti-fog method is easy to influence driving safety.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, a method for controlling anti-fog of an automobile air conditioner includes:
determining a dew point temperature from an air temperature and an air humidity in the vicinity of the windshield;
judging whether a fog risk exists according to the glass surface temperature of the windshield and the dew point temperature;
if yes, determining a change rate of the risk of fogging according to the glass surface temperature and the dew point temperature;
and determining different anti-fog programs according to the change rate of the risk of fog generation and the difference value between the glass surface temperature and the dew point temperature.
Preferably, the step of obtaining the dew point temperature from the air temperature and the air humidity in the vicinity of the windshield includes:
determining a dew point measurement temperature from an air temperature and an air humidity in the vicinity of the windshield;
and determining the dew point temperature according to the dew point measurement temperature and a first error compensation value.
Preferably, the step of determining whether there is a risk of fogging based on the glass surface temperature of the windshield and the dew point temperature includes:
acquiring the surface temperature of glass;
and if the surface temperature of the glass is smaller than the sum of the dew point temperature and the safety temperature difference, judging that the risk of fogging exists.
Preferably, the step of determining the change rate of risk of fogging from the glass surface temperature and the dew point temperature comprises:
determining the glass surface temperature and the dew point temperature once every preset time interval;
and calculating to obtain the change rate of the fogging risk according to the preset time, the glass surface temperature and the dew point temperature which are obtained by two times.
Preferably, the antifogging program includes an antifogging program one, and the step of the antifogging program one includes:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
the air outlet mode, the air quantity and the air outlet temperature are kept unchanged.
Preferably, the antifogging program includes an antifogging program two, and the step of the antifogging program two includes:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
obtaining an air outlet mode, if the air outlet mode is a face blowing mode, adjusting to the face blowing mode for defrosting, if the air outlet mode is a foot blowing mode, adjusting to the foot blowing mode for defrosting, and if the air outlet mode is the face blowing mode, adjusting to the foot blowing mode for defrosting;
the air outlet mode, the air quantity and the air outlet temperature are kept unchanged.
Preferably, the antifogging program includes an antifogging program three, and the step of the antifogging program three includes:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
the air outlet mode is switched to the defrosting mode;
if the change rate of the fog risk is smaller than 0, increasing the air quantity and the opening of a warm air water valve with preset limits every preset time, and if the change rate of the fog risk is not smaller than 0.3, keeping the current air quantity and the opening of the warm air water valve.
Preferably, the antifogging program includes an antifogging program four, and the step of the antifogging program four includes:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
the air outlet mode is switched to the defrosting mode;
the opening of the air quantity and the opening of the warm air water valve are both adjusted to be maximum.
Preferably, the step of determining the different anti-fog program according to the change rate of the risk of fog and the difference between the glass surface temperature and the dew point temperature comprises:
executing the anti-fog program I if the change rate of the fog risk is [ -1, 0) when the difference between the glass surface temperature and the dew point temperature is between a safe temperature difference and a second threshold value; if the change rate of the fog risk is [ -2, -1), executing the second anti-fog program; if the change rate of the fog risk is [ -3, -2), executing the anti-fog program III; if the change rate of the fog risk is smaller than-3, executing the fog prevention program IV;
executing the anti-fog program II if the change rate of the fog risk is [ -1, 0) when the difference between the glass surface temperature and the dew point temperature is between a second threshold value and a third threshold value; if the change rate of the fog risk is [ -2, -1), executing the anti-fog program III; if the change rate of the fog risk is [ -3, -2), executing the anti-fog program IV;
executing the anti-fog program III if the change rate of the risk of fog is [ -1, 0) when the difference between the glass surface temperature and the dew point temperature is between 0 and a third threshold value; and if the change rate of the fog risk is smaller than-1, executing the anti-fog program IV.
Preferably, the step of determining the different anti-fog program according to the change rate of the risk of fog and the difference between the glass surface temperature and the dew point temperature further comprises:
and after each antifogging program is executed, if the change rate of the fogging risk is greater than 0, the current antifogging program is kept.
In a second aspect, an automotive air conditioner anti-fog control device includes:
a first module for determining a dew point temperature based on an air temperature and an air humidity near the windshield;
a second module for determining whether there is a risk of fogging based on the glass surface temperature of the windshield and the dew point temperature;
a third module for determining a risk of fogging change rate, if any, from the glass surface temperature and the dew point temperature;
and a fourth module for determining different anti-fog programs according to the change rate of the fog risk and the difference value between the glass surface temperature and the dew point temperature.
In a third aspect, an apparatus, comprises:
one or more processors;
a storage means for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the vehicle air conditioner anti-fog control method as described above.
In a fourth aspect, a computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements an automotive air conditioner anti-fog control method as described above.
The invention has the beneficial effects that:
according to the anti-fog control method for the automobile air conditioner, the anti-fog risk is determined according to the surface temperature of glass and the air temperature and humidity near the windshield, and the anti-fog program of the air conditioner is automatically adjusted according to the change trend of the dew point temperature, so that the problem of abrupt starting/closing in the existing automatic anti-fog method is avoided, the anti-fog effect can be ensured, the smooth adjustment of the anti-fog function of the air conditioner can be realized, and good and safe driving experience is brought to a driver.
For the anti-fog control device of the automobile air conditioner, the anti-fog risk is determined according to the temperature of the surface of glass and the temperature and humidity of air near the windshield, and the anti-fog program of the air conditioner is automatically adjusted according to the change trend of the dew point temperature, so that the problem of abrupt starting/closing in the existing automatic anti-fog method is avoided, the anti-fog effect can be ensured, the smooth adjustment of the anti-fog function of the air conditioner can be realized, and good and safe driving experience is brought to a driver.
For equipment, the fog risk is determined according to the temperature of the surface of glass and the temperature and humidity of air near the windshield, the fog prevention program of the air conditioner is automatically adjusted according to the change trend of the dew point temperature, the problem of abrupt starting/closing in the existing automatic fog prevention method is avoided, the fog prevention effect can be ensured, the smooth adjustment of the fog prevention function of the air conditioner can be realized, and good and safe driving experience is brought to a driver.
For a computer readable storage medium, the fog risk is determined according to the temperature of the surface of glass and the temperature and humidity of air near the windshield, and the fog prevention program of the air conditioner is automatically adjusted according to the change trend of the dew point temperature, so that the problem of abrupt starting/closing in the existing automatic fog prevention method is avoided, the fog prevention effect can be ensured, the smooth adjustment of the fog prevention function of the air conditioner can be realized, and good and safe driving experience is brought to a driver.
Drawings
Fig. 1 is a schematic structural view of an air conditioning system in the first embodiment;
fig. 2 is a schematic flow chart of an anti-fog control method for an automobile air conditioner according to the first embodiment;
fig. 3 is a schematic structural diagram of an anti-fog control device for an automobile air conditioner according to a second embodiment;
fig. 4 is a schematic structural view of the apparatus provided in the third embodiment.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Embodiment one:
the present embodiment provides an anti-fog control method for an automobile air conditioner, which is suitable for an air conditioning system shown in fig. 1, wherein the air conditioning system comprises an air outlet temperature sensor 11, an outdoor humidity sensor 12, an automatic anti-fog sensor 13, an air conditioner controller 2, an air conditioner fan 31, a mode air door 32, a warm air water valve 33, a compressor 34 and an internal and external circulation motor 35.
The air conditioner controller 2 is connected with the air outlet temperature sensor 11 through a wire harness and is used for receiving the actual air outlet temperature Tc of the air conditioning system, the air conditioner controller 2 is connected with the outdoor humidity sensor 12 through the wire harness and is used for receiving the outdoor air humidity Ho of a driver, and the air conditioner controller 2 is connected with the automatic anti-fog sensor 13 arranged on the inner side of the front windshield through a CAN bus and is used for receiving the dew point temperature Td, the glass surface temperature Tw and the indoor humidity Hi; the air conditioner controller 2 is connected with the air conditioner fan 31 through a wire harness and is used for controlling the air outlet quantity of the air conditioner system, the air conditioner controller 2 is connected with the mode air door 32 through the wire harness and is used for controlling the air outlet mode of the air conditioner system, the air conditioner controller 2 is connected with the warm air water valve 33 through the wire harness and is used for controlling the water flow of the warm air core body to control the air outlet temperature of the air conditioner system, the air conditioner controller 2 is connected with the compressor 34 through the wire harness and is used for controlling the start and stop of the compressor, and the air conditioner controller 2 is connected with the internal and external circulation motor 35 through the wire harness and is used for controlling the air inlet mode of the air conditioner.
Air is sucked by the fan, dehumidified by the refrigeration core, then dehumidified by the fan, heated by the heating core and blown out by the air outlet.
Referring to fig. 2, the anti-fog control method of the automobile air conditioner includes the steps of: and S100, determining the dew point temperature Td according to the air temperature and the air humidity near the windshield. In addition, there are many methods for determining the dew point temperature by using the air temperature and the air humidity, and in this embodiment, step S100 includes:
s101, determining a dew point measurement temperature according to the air temperature and the air humidity near the windshield. In this embodiment, a data table is preset, where the data table includes an air temperature, an air humidity, and a corresponding dew point temperature, that is, an air temperature and an air humidity can be checked correspondingly to obtain a dew point measurement temperature Tdc.
S102, determining a dew point temperature Td according to the dew point measurement temperature Tdc and a first error compensation value a: td=tdc+a.
It should be noted that, the first error compensation value is calibrated in advance, and by introducing the first error compensation value, the dew point temperature Td closer to the fact can be obtained.
Step S100 is followed by step S200 of determining whether there is a risk of fogging according to the glass surface temperature of the windshield and the dew point temperature.
Specifically, step S200 includes:
s201, acquiring a glass surface temperature Tw;
and S202, judging that the fog risk exists if the glass surface temperature Tw is smaller than the sum of the dew point temperature Td and the safety temperature difference.
It should be noted that, theoretically, when the glass surface temperature Tw is less than the dew point temperature Td, the glass may be fogged, and in actual control, in order to cut out the hysteresis of temperature collection and the hysteresis of anti-fogging itself, a safe temperature difference needs to be introduced in advance, and when the glass surface temperature Tw is less than the sum of the dew point temperature Td and the safe temperature difference, there is a risk of foggy.
Further, in this embodiment, the safe temperature difference is 5 ℃. It is understood that if the glass surface temperature Tw is 5 ℃ or higher than the dew point temperature, it is determined that there is a risk of fogging.
Step S200 is followed by step S300 of determining a fogging risk change rate Δt from the glass surface temperature Tw and the dew point temperature Td.
Specifically, step S300 includes:
s301, determining the glass surface temperature and the dew point temperature once every preset time;
and S302, calculating the change rate delta T of the fogging risk according to the preset time, the glass surface temperature and the dew point temperature which are two times before and after.
The expression may be expressed as: deltaT= [ (Tw 2-Td 2) - (Tw 1-Td 1) ]/(T2-T1), T2-T1 being the separation time, tw2-Td2 being the difference between the glass surface temperature of the last time and the dew point temperature, tw1-Td1 being the difference between the glass surface temperature of the last time and the dew point temperature.
The value of DeltaT shows the approaching speed of the glass surface temperature Tw to the dew point temperature Td, deltaT < 0 shows the trend of the glass temperature approaching to the dew point temperature, and the smaller DeltaT shows the faster approaching speed, the faster the future fogging speed, and the system anti-fog strength of the grade needs to be changed to prevent the fogging.
Step S300 is followed by step S400, where different anti-fog procedures are determined according to the change rate Δt of the risk of fog generation and the difference between the glass surface temperature Tw and the dew point temperature Td, where the anti-fog procedures are used to control the air outlet mode, the air volume and the air outlet temperature.
Specifically, there are various antifogging procedures in the present embodiment.
Wherein, antifogging procedure one includes:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
the air outlet mode, the air quantity and the air outlet temperature are kept unchanged.
Specifically, the system activates the compressor 34 while comparing the values of the indoor humidity Hi and the outdoor humidity Ho, if Ho is less than or equal to Hi, opening the outer cycle, and if Ho is less than or equal to Hi, opening the inner cycle. At this time, the air outlet mode and the air quantity of the air conditioning system are kept unchanged, the air conditioning controller 2 controls the water valve motor according to the feedback value of the air outlet temperature Tc, the air outlet temperature is kept unchanged, and the stability of the temperature in the cab at this time is ensured.
The antifogging program II comprises:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
obtaining an air outlet mode, if the air outlet mode is a face blowing mode, adjusting to the face blowing mode for defrosting, if the air outlet mode is a foot blowing mode, adjusting to the foot blowing mode for defrosting, and if the air outlet mode is the face blowing mode, adjusting to the foot blowing mode for defrosting;
the air outlet mode, the air quantity and the air outlet temperature are kept unchanged.
Specifically, the system starts the compressor, compares the indoor humidity Hi and the outdoor humidity Ho, if Ho is less than or equal to Hi, opens the outer circulation, if Ho is less than or equal to Hi, opens the inner circulation, adjusts the air outlet mode to the face-blowing defrosting mode if the face is blown, adjusts to the foot-blowing defrosting mode if the foot is blown, adjusts to the foot-blowing defrosting mode if the air outlet mode is blown, at this time, the air outlet mode and the air quantity of the air conditioning system are kept unchanged, the air conditioner controller 2 keeps the air outlet temperature unchanged according to the feedback value of the air outlet temperature Tc, and ensures the stability of the temperature in the cab at this time.
Anti-fog procedure three:
acquiring indoor humidity Hi and outdoor humidity Ho;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
the air outlet mode is switched to the defrosting mode;
if the change rate of the fog risk is smaller than 0, increasing the air quantity and the opening of a warm air water valve with preset limits every preset time, and if the change rate of the fog risk is not smaller than 0.3, keeping the current air quantity and the opening of the warm air water valve.
Specifically, the system starts the compressor, and simultaneously compares the values of indoor humidity Hi and outdoor humidity Ho, if Ho is less than or equal to Hi, the external circulation is opened, otherwise, the internal circulation is opened, the air outlet mode is switched to the defrosting mode, if DeltaT is less than 0, the air quantity is increased by one gear every 5s, the opening of the warm air water valve is increased by 10% every 5s, and the current air quantity and the opening state of the water valve are kept until DeltaT is more than or equal to 0.3.
Antifogging procedure four:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
the air outlet mode is switched to the defrosting mode;
the opening of the air quantity and the opening of the warm air water valve are both adjusted to be maximum.
Specifically, the system starts the compressor, and compares the indoor humidity Hi and the outdoor humidity Ho, if Ho is less than or equal to Hi, the external circulation is opened, otherwise, the internal circulation is opened, the air outlet mode is switched to the defrosting mode, the air quantity is maximum, and the opening degree of the warm air water valve is maximum.
If the glass surface temperature Tw is greater than the dew point temperature td+ and the safety temperature difference is 5 ℃, it means that there is no risk of fogging, and the air conditioning system does not have an anti-fog action.
Further, step S400 includes:
if the glass surface temperature Tw and the dew point temperature Td satisfy: td+3 < Tw is less than or equal to Td+5, then the fog-forming dangerous area is entered, if-1 is less than or equal to DeltaT < 0, then-2 is less than or equal to DeltaT < -1, then-3 is less than or equal to DeltaT < -2, and finally-3 is entered into the fog-forming program four.
If the glass surface temperature Tw and the dew point temperature Td satisfy: td+1 < Tw is less than or equal to Td+3, and enters the fog risk area, and at the moment, if ΔT is less than or equal to-1 and less than 0, the fog prevention program II, if ΔT is less than or equal to-2 and less than or equal to-1, the fog prevention program III, and if ΔT is less than or equal to-2, the fog prevention program IV.
If the glass surface temperature Tw and the dew point temperature Td satisfy: td is less than Tw and less than or equal to Td+1, and enters a fog risk area, if Tw is less than or equal to-1 and less than 0, enters an anti-fog program III, and if Tt is less than or equal to-1, enters an anti-fog program IV.
After each execution of one of the antifogging procedures, if the change rate Δt of the risk of fogging is greater than 0, the current defogging procedure is maintained.
According to the anti-fog control method for the automobile air conditioner, provided by the embodiment, the fog risk is determined according to the glass surface temperature Tw and the air temperature and humidity near the windshield, the anti-fog program of the air conditioner is automatically adjusted according to the change trend of the dew point temperature Td, the problem that the starting/closing of the existing automatic anti-fog method is abrupt is avoided, the anti-fog effect can be ensured, the smooth adjustment of the anti-fog function of the air conditioner can be realized, and good and safe driving experience is brought to a driver.
Embodiment two:
the present embodiment provides an anti-fog control device for an automobile air conditioner, as shown in fig. 3, which includes a first module 101, a second module 102, a third module 103, and a fourth module 104.
Wherein the first module 101 is configured to determine a dew point temperature according to an air temperature and an air humidity near the windshield;
a second module 102 for determining whether there is a risk of fogging based on the glass surface temperature of the windshield and the dew point temperature;
a third module 103 for determining a change rate of risk of fogging, if any, from the glass surface temperature and the dew point temperature;
a fourth module 104 for determining a different defogging procedure based on the rate of change of the risk of fogging and a difference between the glass surface temperature and the dew point temperature.
The automobile air conditioner anti-fog control device provided by the embodiment specifically executes the flow of each embodiment, and specifically details of the automobile air conditioner anti-fog control method are shown in the specification.
According to the anti-fog control device for the automobile air conditioner, provided by the embodiment, the fog risk is determined according to the glass surface temperature Tw and the air temperature and humidity near the windshield, the anti-fog program of the air conditioner is automatically adjusted according to the change trend of the dew point temperature Td, the problem that the starting/closing is abrupt in the existing automatic anti-fog method is avoided, the anti-fog effect can be ensured, the smooth adjustment of the anti-fog function of the air conditioner can be realized, and good and safe driving experience is brought to a driver.
Embodiment III:
the present embodiment provides an apparatus, and fig. 4 is a schematic structural diagram of the apparatus provided in the present embodiment. Fig. 4 shows a block diagram of an exemplary device 12 suitable for use in implementing embodiments of the present invention. The device 12 shown in fig. 4 is merely an example and should not be construed as limiting the functionality and scope of use of embodiments of the present invention.
As shown in fig. 4, device 12 is in the form of a general purpose computing device. Components of device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.
Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, and a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include Industry Standard Architecture (ISA) bus, micro channel architecture (MAC) bus, enhanced ISA bus, video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
Device 12 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 30 and/or cache memory 32. Device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 4, commonly referred to as a "hard disk drive"). Although not shown in fig. 4, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored in, for example, memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods of the embodiments described herein.
Device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with device 12, and/or any devices (e.g., network card, modem, etc.) that enable device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. In addition, in the device 12 of the present embodiment, the display 24 is not present as a separate body, but is embedded in the mirror surface, and the display surface of the display 24 and the mirror surface are visually integrated when the display surface of the display 24 is not displayed. Also, device 12 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet, via network adapter 20. As shown, network adapter 20 communicates with other modules of device 12 over bus 18. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, implementing a control method provided by the above-described embodiment.
According to the equipment provided by the embodiment, the fog risk is determined according to the glass surface temperature Tw and the air temperature and humidity near the windshield, the air conditioner fog prevention program is automatically adjusted according to the change trend of the dew point temperature Td, the problem that the starting/closing is abrupt in the existing automatic fog prevention method is avoided, the fog prevention effect can be ensured, the smooth adjustment of the air conditioner fog prevention function can be realized, and good and safe driving experience is brought to a driver.
Embodiment four:
a sixth embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a control method provided by the above embodiment.
Any combination of one or more computer readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
According to the computer readable storage medium provided by the embodiment, the fog risk is determined according to the glass surface temperature Tw and the air temperature and humidity near the windshield, the air conditioner fog prevention program is automatically adjusted according to the change trend of the dew point temperature Td, the problem of abrupt starting/closing in the existing automatic fog prevention method is avoided, the fog prevention effect can be ensured, the smooth adjustment of the air conditioner fog prevention function can be realized, and good and safe driving experience is brought to a driver.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (12)
1. An anti-fog control method for an automobile air conditioner is characterized by comprising the following steps:
determining a dew point temperature from an air temperature and an air humidity in the vicinity of the windshield;
judging whether a fog risk exists according to the glass surface temperature of the windshield and the dew point temperature;
if yes, determining a change rate of the risk of fogging according to the glass surface temperature and the dew point temperature;
determining different anti-fog programs according to the change rate of the fog risk and the difference value between the glass surface temperature and the dew point temperature, wherein the anti-fog programs are used for controlling an air outlet mode, air quantity and air outlet temperature;
the antifogging program comprises an antifogging program I, an antifogging program II, an antifogging program III and an antifogging program IV;
the step of determining different anti-fog programs according to the change rate of the risk of fog and the difference between the glass surface temperature and the dew point temperature comprises the following steps:
executing the anti-fog program I if the change rate of the fog risk is [ -1, 0) when the difference between the glass surface temperature and the dew point temperature is between a safe temperature difference and a second threshold value; if the change rate of the fog risk is [ -2, -1), executing the second anti-fog program; if the change rate of the fog risk is [ -3, -2), executing the anti-fog program III; if the change rate of the fog risk is smaller than-3, executing the fog prevention program IV;
executing the anti-fog program II if the change rate of the fog risk is [ -1, 0) when the difference between the glass surface temperature and the dew point temperature is between a second threshold value and a third threshold value; if the change rate of the fog risk is [ -2, -1), executing the anti-fog program III; if the change rate of the fog risk is [ -3, -2), executing the anti-fog program IV;
executing the anti-fog program III if the change rate of the risk of fog is [ -1, 0) when the difference between the glass surface temperature and the dew point temperature is between 0 and a third threshold value; and if the change rate of the fog risk is smaller than-1, executing the anti-fog program IV.
2. The method of controlling anti-fog of an automobile air conditioner according to claim 1, wherein the step of obtaining the dew point temperature from the air temperature and the air humidity in the vicinity of the windshield comprises:
determining a dew point measurement temperature from an air temperature and an air humidity in the vicinity of the windshield;
and determining the dew point temperature according to the dew point measurement temperature and a first error compensation value.
3. The method of controlling anti-fog of an automobile air conditioner according to claim 1, wherein the step of judging whether there is a risk of fog from the glass surface temperature of the windshield and the dew point temperature comprises:
acquiring the surface temperature of glass;
and if the surface temperature of the glass is smaller than the sum of the dew point temperature and the safety temperature difference, judging that the risk of fogging exists.
4. A method of controlling anti-fog in an automotive air conditioner according to claim 3, wherein the step of determining the rate of change of risk of fog from the glass surface temperature and the dew point temperature comprises:
determining the glass surface temperature and the dew point temperature once every preset time interval;
and calculating to obtain the change rate of the fogging risk according to the preset time, the glass surface temperature and the dew point temperature which are obtained by two times.
5. The method of claim 4, wherein the step of the first antifogging program comprises:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
the air outlet mode, the air quantity and the air outlet temperature are kept unchanged.
6. The method of claim 5, wherein the step of the second antifogging program comprises:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
obtaining an air outlet mode, if the air outlet mode is a face blowing mode, adjusting to the face blowing mode for defrosting, if the air outlet mode is a foot blowing mode, adjusting to the foot blowing mode for defrosting, and if the air outlet mode is the face blowing mode, adjusting to the foot blowing mode for defrosting;
the air outlet mode, the air quantity and the air outlet temperature are kept unchanged.
7. The method of claim 6, wherein the step of the third antifogging program comprises:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
the air outlet mode is switched to the defrosting mode;
if the change rate of the fog risk is smaller than 0, increasing the air quantity and the opening of a warm air water valve with preset limits every preset time, and if the change rate of the fog risk is not smaller than 0.3, keeping the current air quantity and the opening of the warm air water valve.
8. The method of claim 7, wherein the step of the fourth antifogging program comprises:
acquiring indoor humidity and outdoor humidity;
judging whether the external circulation or the internal circulation is opened according to the indoor humidity and the outdoor humidity;
the air outlet mode is switched to the defrosting mode;
the opening of the air quantity and the opening of the warm air water valve are both adjusted to be maximum.
9. The method of controlling anti-fog for an automotive air conditioner according to claim 1, wherein the step of determining different anti-fog programs according to the change rate of the risk of fog and the difference between the glass surface temperature and the dew point temperature further comprises:
and after each antifogging program is executed, if the change rate of the fogging risk is greater than 0, the current antifogging program is kept.
10. An automotive air conditioner anti-fog control apparatus for implementing the automotive air conditioner anti-fog control method as claimed in any one of claims 1 to 9, comprising:
a first module for determining a dew point temperature based on an air temperature and an air humidity near the windshield;
a second module for determining whether there is a risk of fogging based on the glass surface temperature of the windshield and the dew point temperature;
a third module for determining a risk of fogging change rate, if any, from the glass surface temperature and the dew point temperature;
and a fourth module for determining different anti-fog programs according to the change rate of the fog risk and the difference value between the glass surface temperature and the dew point temperature.
11. An apparatus, comprising:
one or more processors;
a storage means for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the automotive air conditioner anti-fog control method of any one of claims 1-9.
12. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the vehicle air conditioner anti-fog control method as claimed in any one of claims 1 to 9.
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