阅读说明：本技术 一种空调控制方法、控制装置及控制系统 (Air conditioner control method, control device and control system ) 是由 曾高娃 于 2021-08-18 设计创作，主要内容包括：本申请涉及一种空调控制方法、控制装置及控制系统,涉及空调控制技术领域,该方法包括：以前挡风玻璃温度与露点温度的差值作为判断温差；获取车辆所处环境工况下的三个不相连的温差区间；相邻两个温差区间的低端值之间构成一个起雾风险区间,小于或等于第三温差区间低端值的区间为一个起雾风险区间；根据判断温差的初始值所处的起雾风险区间,选择对应的循环模式和出风模式；当判断温差降低至任一起雾风险区间的高端值时,切换至该起雾风险区间对应的循环模式和出风模式；当判断温差由任一温差区间的低端值升高至其高端值时,切换至该高端值所在起雾风险区间对应的循环模式和出风模式；本申请,可减少车内温度波动,减少空调能耗。(The application relates to an air conditioner control method, a control device and a control system, which relate to the technical field of air conditioner control, and the method comprises the following steps: the difference value between the front windshield temperature and the dew point temperature is used as a judgment temperature difference; acquiring three unconnected temperature difference intervals under the working condition of the environment where the vehicle is located; a fog risk interval is formed between the lower end values of the two adjacent temperature difference intervals, and the interval which is less than or equal to the lower end value of the third temperature difference interval is a fog risk interval; selecting a corresponding circulation mode and an air outlet mode according to the fogging risk interval where the initial value of the temperature difference is judged; when the temperature difference is judged to be reduced to the high end value of any fogging risk interval, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval; when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value thereof, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval where the high end value is located; this application, reducible temperature fluctuation in the car reduces the air conditioner energy consumption.)

1. An air conditioner control method is characterized by comprising the following steps:

acquiring the temperature of a front windshield and the dew point temperature, and taking the difference value of the temperature of the front windshield and the dew point temperature as a judgment temperature difference;

acquiring three unconnected temperature difference intervals under the working condition of the environment where the vehicle is located, wherein the second temperature difference interval is located between the low end value of the first temperature difference interval and the high end value of the third temperature difference interval; a fog risk interval is formed between the lower end values of the two adjacent temperature difference intervals, and the interval which is less than or equal to the lower end value of the third temperature difference interval is a fog risk interval;

selecting a corresponding circulation mode and an air outlet mode according to the fogging risk interval where the initial value of the temperature difference is judged;

when the temperature difference is judged to be reduced to the high end value of any fogging risk interval, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval;

and when the judged temperature difference is increased from the low end value of any temperature difference interval to the high end value, switching to the circulation mode and the air outlet mode corresponding to the fogging risk interval where the high end value is located.

2. The air conditioner control method as claimed in claim 1, wherein: and a low-fogging risk interval is formed between the low end value of the second temperature difference interval and the low end value of the first temperature difference interval, a medium-fogging risk interval is formed between the low end value of the third temperature difference interval and the low end value of the second temperature difference interval, and an interval which is smaller than or equal to the low end value of the third temperature difference interval is a high-fogging risk interval.

3. The air conditioner control method as claimed in claim 2, wherein:

the circulation mode corresponding to the low fogging risk interval is a first compensation circulation mode, and the corresponding air outlet mode is a comfort air outlet mode; the compensation cycle mode is as follows: the air inlet of the air conditioner is in an internal and external circulation mixed air mode;

the circulation mode corresponding to the middle fogging risk interval is a second compensation circulation mode, and the corresponding air outlet mode is a defrosting mode; the internal circulation proportion of the second compensation circulation mode is smaller than that of the first compensation circulation mode;

the circulation mode corresponding to the high-fogging risk interval is an external circulation mode, and the corresponding air outlet mode is a defrosting mode.

4. The air conditioner control method according to claim 1, wherein the obtaining of three unconnected temperature difference intervals under the environment condition of the vehicle specifically comprises:

acquiring the current outside temperature, the sunlight intensity and the relative humidity of a front windshield;

looking up a table based on a prestored relation table to obtain a first compensation value, a second compensation value and a third compensation value under the outside temperature, the sunlight intensity and the relative humidity of the front windshield;

taking the sum of the first compensation value and a first preset value as a low end value of a first temperature difference interval, and taking the sum of the first compensation value and a second preset difference value as a high end value of the first temperature difference interval;

taking the sum of the second compensation value and a first preset value as a low end value of a second temperature difference interval, and taking the sum of the second compensation value and a second preset difference value as a high end value of the second temperature difference interval;

and taking the sum of the third compensation value and the first preset value as the low end value of a third temperature difference interval, and taking the sum of the third compensation value and a third preset difference value as the high end value of the third temperature difference interval.

5. The air conditioner control method as claimed in claim 4, wherein: the first preset value is 1-3 ℃.

6. The air conditioner control method as claimed in claim 4, wherein: the second preset value is 3-6 ℃.

7. The air conditioner control method as claimed in claim 1, wherein: and when the initial value of the judgment temperature difference is larger than the low end value of the first temperature difference interval, controlling the air conditioner to be in an internal circulation mode and a comfortable air outlet mode.

8. The air conditioning control method according to claim 1, wherein before the obtaining of the front windshield temperature and the dew point temperature, further comprising:

and judging whether the air conditioner is set to the AUTO operation mode, if not, not obtaining the temperature of the front windshield and the dew point temperature.

9. An air conditioning control device based on the method of claim 1, characterized by comprising:

the device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring the temperature of a front windshield and the dew point temperature and taking the difference value of the temperature of the front windshield and the dew point temperature as a judgment temperature difference;

the second acquisition module is used for acquiring three unconnected temperature difference intervals and a plurality of fogging risk intervals under the working condition of the environment where the vehicle is located;

the control module is used for selecting a corresponding circulation mode and an air outlet mode according to the fogging risk interval where the initial value of the temperature difference is judged;

the control module is further used for switching to a circulation mode and an air outlet mode corresponding to any fogging risk interval when the temperature difference is judged to be reduced to a high end value of the fogging risk interval; and when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value, switching to the circulation mode and the air outlet mode corresponding to the fogging risk interval where the high end value is located.

10. An air conditioning control system characterized by comprising the air conditioning control device of claim 9, and further comprising:

a solar sensor for collecting solar intensity;

the temperature and humidity sensor is used for acquiring the temperature and the relative humidity of the front windshield and acquiring the dew point temperature based on the temperature and the relative humidity of the front windshield;

the external temperature sensor is used for acquiring the external temperature of the vehicle and sending the external temperature to the air conditioner control device;

and the vehicle body controller is used for sending the sunlight intensity, the temperature of the front windshield, the relative humidity of the front windshield and the dew point temperature to the air conditioner control device.

Technical Field

The application relates to the technical field of air conditioner control, in particular to an air conditioner control method, a control device and a control system.

Background

At present, new energy automobiles are rapidly developed, and the problem of how to reduce the energy consumption of the new energy automobiles is always a core subject of each new energy host factory. The automobile air conditioner is one of the parts with large power consumption on the new energy automobile, and is also a key object of research of various new energy host factories.

In the related art, the air intake mode of the air conditioner is mainly an external circulation mode and an internal circulation mode. The internal circulation mode does not bring in heat load outside the vehicle, so the energy consumption is lower than that of the external circulation mode. However, the internal circulation is used for a long time, which easily causes the problem of fog in the vehicle due to the fact that the humidity in the vehicle is high because of the respiration of passengers, and also easily causes the reduction of the oxygen content in the vehicle, and the comfort experience of the passengers is not good. In addition, when the passenger feels uncomfortable to manually adjust the cycle to the outer cycle or fog the front windshield of the vehicle to the defrosting mode, sudden adjustment from the full inner cycle to the full outer cycle also generates large temperature fluctuation, so that the comfort is poor, and the energy consumption of the air conditioner is relatively high.

Disclosure of Invention

In view of one of the defects in the prior art, an object of the present application is to provide an air conditioner control method, a control device and a control system, so as to solve the problems of large temperature fluctuation, poor comfort and high energy consumption caused by directly adjusting from a full internal circulation to a full external circulation in the related art.

A first aspect of the present application provides an air conditioner control method, including the steps of:

acquiring the temperature of a front windshield and the dew point temperature, and taking the difference value of the temperature of the front windshield and the dew point temperature as a judgment temperature difference;

acquiring three unconnected temperature difference intervals under the working condition of the environment where the vehicle is located, wherein the second temperature difference interval is located between the low end value of the first temperature difference interval and the high end value of the third temperature difference interval; a fog risk interval is formed between the lower end values of the two adjacent temperature difference intervals, and the interval which is less than or equal to the lower end value of the third temperature difference interval is a fog risk interval;

selecting a corresponding circulation mode and an air outlet mode according to the fogging risk interval where the initial value of the temperature difference is judged;

when the temperature difference is judged to be reduced to the high end value of any fogging risk interval, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval;

and when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value, switching to the circulation mode and the air outlet mode corresponding to the fogging risk interval where the high end value is located.

In some embodiments, a low-fogging risk interval is formed between a low end value of the second temperature difference interval and a low end value of the first temperature difference interval, a medium-fogging risk interval is formed between a low end value of the third temperature difference interval and a low end value of the second temperature difference interval, and an interval less than or equal to the low end value of the third temperature difference interval is taken as a high-fogging risk interval.

In some embodiments, the circulation mode corresponding to the low fogging risk section is a first compensation circulation mode, and the corresponding air outlet mode is a comfort air outlet mode; the compensation cycle mode is as follows: the air inlet of the air conditioner is in an internal and external circulation mixed air mode;

the circulation mode corresponding to the middle fogging risk interval is a second compensation circulation mode, and the corresponding air outlet mode is a defrosting mode; the internal circulation proportion of the second compensation circulation mode is smaller than that of the first compensation circulation mode;

the circulation mode corresponding to the high-fogging risk interval is an external circulation mode, and the corresponding air outlet mode is a defrosting mode.

In some embodiments, the obtaining three unconnected temperature difference intervals under the environmental condition of the vehicle specifically includes:

acquiring the current outside temperature, the sunlight intensity and the relative humidity of a front windshield;

looking up a table based on a prestored relation table to obtain a first compensation value, a second compensation value and a third compensation value under the outside temperature, the sunlight intensity and the relative humidity of the front windshield;

taking the sum of the first compensation value and a first preset value as a low end value of a first temperature difference interval, and taking the sum of the first compensation value and a second preset difference value as a high end value of the first temperature difference interval;

taking the sum of the second compensation value and a first preset value as a low end value of a second temperature difference interval, and taking the sum of the second compensation value and a second preset difference value as a high end value of the second temperature difference interval;

and taking the sum of the third compensation value and the first preset value as the low end value of the third temperature difference interval, and taking the sum of the third compensation value and the third preset difference value as the high end value of the third temperature difference interval.

In some embodiments, the first predetermined value is 1-3 ℃.

In some embodiments, the second predetermined value is 3-6 ℃.

In some embodiments, when the initial value of the determination temperature difference is greater than the low end value of the first temperature difference interval, the air conditioner is controlled to be in an internal circulation mode and a comfort air-out mode.

In some embodiments, before obtaining the front windshield temperature and the dew point temperature, the method further includes:

and judging whether the air conditioner is set to the AUTO operation mode, if not, not obtaining the temperature of the front windshield and the dew point temperature.

The second aspect of the present application provides an air conditioner control device based on the above method, which includes:

the first acquisition module is used for acquiring the temperature of the front windshield and the dew point temperature and taking the difference value of the temperature of the front windshield and the dew point temperature as a judgment temperature difference;

the second acquisition module is used for acquiring three unconnected temperature difference intervals and a plurality of fogging risk intervals under the working condition of the environment where the vehicle is located;

the control module is used for selecting a corresponding circulation mode and an air outlet mode according to the fogging risk interval where the initial value of the temperature difference is judged;

the control module is further used for switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval when the temperature difference is judged to be reduced to a high end value of any fogging risk interval; and when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value, switching to the circulation mode and the air outlet mode corresponding to the fogging risk interval where the high end value is located.

A third aspect of the present application provides an air conditioning control system including the above air conditioning control apparatus, further including:

a solar sensor for collecting solar intensity;

the temperature and humidity sensor is used for acquiring the temperature and the relative humidity of the front windshield and acquiring the dew point temperature based on the temperature and the relative humidity of the front windshield;

the external temperature sensor is used for acquiring the external temperature of the vehicle and sending the external temperature to the air conditioner control device;

and the vehicle body controller is used for sending the sunlight intensity, the temperature of the front windshield, the relative humidity of the front windshield and the dew point temperature to the air conditioner control device.

The beneficial effect that technical scheme that this application provided brought includes:

the application provides an air conditioner control method, a control device and a control system, wherein after the temperature of a front windshield and the dew point temperature are obtained, the difference value of the temperature of the front windshield and the dew point temperature is used as a judgment temperature difference, and three unconnected temperature difference intervals and a plurality of fogging risk intervals under the working condition of the environment where a vehicle is located are obtained, a corresponding circulation mode and an air outlet mode can be selected according to the fogging risk intervals where the initial values of the judgment temperature difference are located; when the temperature difference is judged to be reduced to the high end value of any fogging risk interval, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval; when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value thereof, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval where the high end value is located; therefore, the corresponding circulation mode and the air outlet mode are set according to different fog risk intervals, the circulation mode and the air outlet mode cannot be frequently switched in a short time, temperature fluctuation in the vehicle can be reduced, riding comfort of passengers is guaranteed, and energy consumption of an air conditioner can be greatly reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a flow chart of an air conditioner control method according to an embodiment of the present application;

fig. 2 is a schematic block diagram of an air conditioning control system according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The embodiment of the application provides an air conditioner control method, which can solve the problems of large temperature fluctuation, poor comfort and high energy consumption caused by direct adjustment from a full inner circulation to a full outer circulation in the related art.

As shown in fig. 1, the air conditioner control method according to the embodiment of the present application specifically includes the following steps:

s1, acquiring the temperature of a front windshield and the dew point temperature, and taking the difference value of the temperature of the front windshield and the dew point temperature as a judgment temperature difference.

S2, acquiring three unconnected temperature difference intervals under the working condition of the environment where the vehicle is located, wherein the second temperature difference interval is located between the low end value of the first temperature difference interval and the high end value of the third temperature difference interval; and a fog risk interval is formed between the lower end values of the two adjacent temperature difference intervals, and the interval which is less than or equal to the lower end value of the third temperature difference interval is a fog risk interval.

The environment working conditions of the vehicle comprise the temperature outside the vehicle, the sunlight intensity and the like.

And S3, selecting a corresponding circulation mode and an air outlet mode according to the fogging risk interval where the initial value of the temperature difference is judged.

In this embodiment, each fogging risk section corresponds to a circulation mode and an air outlet mode of an air conditioner, respectively.

And S4, when the temperature difference is judged to be reduced to the high end value of any fogging risk interval, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval.

And S5, when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval where the high end value is located.

According to the air conditioner control method, the temperature of the front windshield and the dew point temperature are obtained, the difference value between the temperature of the front windshield and the dew point temperature serves as a judgment temperature difference, three unconnected temperature difference intervals and a plurality of fogging risk intervals under the working condition of the environment where the vehicle is located are obtained, and then the corresponding circulation mode and the corresponding air outlet mode can be selected according to the fogging risk interval where the initial value of the judgment temperature difference is located; when the temperature difference is judged to be reduced to the high end value of any fogging risk interval, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval; when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value thereof, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval where the high end value is located; therefore, the corresponding circulation mode and the air outlet mode are set according to different fog risk intervals, the circulation mode and the air outlet mode cannot be frequently switched in a short time, temperature fluctuation in the vehicle can be reduced, riding comfort of passengers is guaranteed, and energy consumption of an air conditioner can be greatly reduced.

In this embodiment, the fogging risk sections include a low fogging risk section, a medium fogging risk section, and a high fogging risk section.

A low fogging risk interval is formed between the low end value of the second temperature difference interval and the low end value of the first temperature difference interval, a medium fogging risk interval is formed between the low end value of the third temperature difference interval and the low end value of the second temperature difference interval, and an interval smaller than or equal to the low end value of the third temperature difference interval is a high fogging risk interval.

On the basis of the above embodiment, in this embodiment, the circulation mode corresponding to the low fogging risk section is a first compensation circulation mode, and the corresponding air outlet mode is a comfort air outlet mode; the compensation cycle mode is as follows: the air inlet of the air conditioner is in an internal and external circulation mixed air mode. Optionally, the comfort air-out mode is a face-blowing mode, a foot-blowing mode, or the like, which is controlled according to actual conditions.

And when the initial value of the temperature difference is judged to be in the low-fogging risk interval, controlling the air conditioner to be in a first compensation circulation mode and a comfortable air outlet mode.

The circulation mode corresponding to the middle fogging risk interval is a second compensation circulation mode, and the corresponding air outlet mode is a defrosting mode; the internal circulation ratio of the second compensation circulation mode is smaller than that of the first compensation circulation mode.

And when the initial value of the temperature difference is judged to be in the middle fogging risk interval, controlling the air conditioner to be in a second compensation circulation mode and a defrosting mode.

The circulation mode corresponding to the high-fogging risk interval is an external circulation mode, and the corresponding air outlet mode is a defrosting mode. And when the initial value of the temperature difference is judged to be in the high-fogging risk interval, controlling the air conditioner to be in an external circulation mode and a defrosting mode.

In this embodiment, the internal circulation mode is that the air conditioner extracts air in the vehicle, and the air flow is conveyed from the air outlet of the air conditioner into the vehicle through the air conditioner box body, the air duct and other devices, so as to form an air flow conveying circulation in the vehicle. The external circulation mode is that the air conditioner extracts air outside the vehicle, air flow is conveyed into the vehicle from an air outlet of the air conditioner through equipment such as an air conditioner box body and an air duct, and simultaneously air accumulated in the vehicle is released out of the vehicle through a pressure relief port of the vehicle, so that air flow conveying circulation is formed between the outside of the vehicle and the vehicle.

Optionally, in the step S2, the obtaining three unconnected temperature difference intervals under the environment condition of the vehicle specifically includes the following steps:

first, the current outside temperature, the sunlight intensity and the front windshield relative humidity are acquired.

Optionally, the vehicle is provided with an outside temperature sensor, a sunlight sensor and a temperature and humidity sensor arranged at the front windshield; the sunlight intensity can be collected through the sunlight sensor, the temperature outside the vehicle can be collected through the temperature sensor outside the vehicle, the temperature of the surface of the front windshield and the relative humidity of the front windshield are collected through the temperature and humidity sensor, and then the dew point temperature can be calculated and obtained according to the collected temperature of the front windshield and the collected relative humidity of the front windshield.

And then, looking up a table based on a prestored relation table to obtain a first compensation value, a second compensation value and a third compensation value under the outside temperature, the sunlight intensity and the relative humidity of the front windshield. Wherein, the first temperature difference interval can be determined by the first compensation value, the second temperature difference interval can be determined by the second compensation value, and the third temperature difference interval can be determined by the third compensation value.

Alternatively, the above-mentioned relationship table may be obtained by a bench test. Specifically, temperature difference compensation values of three fog risks in different degrees are calibrated sequentially under different external temperatures, sunlight intensities and relative humidities of the front windshield, and are used as a first compensation value, a second compensation value and a third compensation value under the current external temperatures, the sunlight intensities and the relative humidities of the front windshield.

In this embodiment, the relative humidity of the front windshield to be calibrated includes 25%, 50%, 75%, and 100%, that is, under the same outside temperature and sunlight intensity, each relative humidity is calibrated with three temperature difference compensation values. In the control process of the present embodiment, the front windshield relative humidity is determined based on the environment, and the variation is small.

Specifically, the sum of the first compensation value and the first preset value is used as the lower end value of the first temperature difference interval, i.e. the first limit value, and the sum of the first compensation value and the second preset difference value is used as the upper end value of the first temperature difference interval, i.e. the first exit limit value.

And taking the sum of the second compensation value and the first preset value as a low end value of a second temperature difference interval, namely a second limit value, and taking the sum of the second compensation value and a second preset difference value as a high end value of the second temperature difference interval, namely a second exit limit value.

And taking the sum of the third compensation value and the first preset value as a low end value of a third temperature difference interval, namely a third limit value, and taking the sum of the third compensation value and a third preset difference value as a high end value of the third temperature difference interval, namely a third exit limit value.

In this embodiment, the low fogging risk interval is: an interval greater than the second limit and not greater than the first limit; the middle fogging risk interval is as follows: an interval greater than the third limit and not greater than the second limit; the high fogging risk interval is as follows: an interval less than or equal to the third limit value.

Optionally, the first preset value is 1 to 3 ℃. Preferably, the first preset value is 1 ℃.

Optionally, the second preset value is 3 to 6 ℃. Preferably, the second preset value is 3 ℃.

Preferably, when the initial value of the judgment temperature difference is greater than the low end value of the first temperature difference interval, the air conditioner is controlled to be in an internal circulation mode and a comfortable air outlet mode. When the initial value of the temperature difference is larger than the first limit value, the air conditioner is controlled to be in an internal circulation mode and a comfortable air outlet mode.

Further, when the temperature difference is increased from being smaller than a first limit value to the first exit limit value, the air conditioner can be controlled to be in an internal circulation mode and a comfortable air outlet mode.

On the basis of the above embodiment, in this embodiment, before obtaining the front windshield temperature and the dew point temperature, the method further includes the following steps:

judging whether the air conditioner is set to be in an AUTO operation mode, if so, acquiring the temperature of front windshield glass and the dew point temperature; otherwise, the front windshield temperature and the dew point temperature are not acquired. Through the judgment, the control method is effective when the vehicle air conditioner is set to be in the AUTO running mode, namely the manual mode is based on the user setting so as to ensure that the user requirements are not deviated by the control method.

The air conditioner control method in the embodiment of the application specifically comprises the following steps:

A1. the vehicle is powered on, and the air conditioner is started and set to be in an AUTO running mode;

A2. collecting vehicle information including the outside temperature, the sunlight intensity and the relative humidity of a front windshield, and determining a first limit value, a second limit value and a third limit value as well as a first exit limit value, a second exit limit value and a third exit limit value, namely three unconnected temperature difference intervals and three fogging risk intervals under the current environment condition of the vehicle;

A3. calculating the difference value between the temperature of the front windshield and the dew point temperature to serve as a judgment temperature difference;

A4. selecting a corresponding circulation mode and an air outlet mode according to the fogging risk interval where the initial value of the temperature difference is judged;

A5. when the temperature difference is judged to be reduced to the high end value of any fogging risk interval, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval;

A6. and when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value, switching to the circulation mode and the air outlet mode corresponding to the fogging risk interval where the high end value is located.

Specifically, when the initial value of the temperature difference is judged to be in the low-fogging risk interval, the air conditioner control device automatically starts the electric compressor or the PTC heating element according to the current working condition, and controls the air conditioner to be in a first compensation circulation mode and a comfort air outlet mode, namely a circulation air door is opened to a first specified position, and air outlet is set according to comfort; if the temperature difference is judged to be increased to the first exit limit value, the air conditioner control device controls the electric compressor or the PTC heating element according to the current working condition, and controls the air conditioner to be switched into an internal circulation mode and a comfortable air outlet mode; and if the temperature difference is reduced to a second limit value, controlling the air conditioner to be switched into a second compensation circulation mode and a defrosting mode until the temperature difference is increased to a second exit limit value, and controlling the air conditioner to be switched into a first compensation circulation mode and a comfortable air outlet mode.

Optionally, the PTC heating elements include water-heated PTC heating elements and wind-heated PTC heating elements, which operate using the high voltage of the vehicle to provide primarily heating of the passenger compartment. The electric compressor works with high voltage electricity of the vehicle and mainly provides refrigeration for the passenger compartment.

When the initial value of the temperature difference is in the middle fogging risk interval, the air conditioner control device automatically starts the electric compressor or the PTC heating element according to the current working condition, and controls the air conditioner to be in a second compensation circulation mode and a defrosting mode, namely, a circulation air door is opened to a second appointed position, and air is discharged according to the defrosting mode; if the temperature difference is judged to be increased to the second exit limit value, the air conditioner is controlled to be switched into a first compensation circulation mode and a comfortable air outlet mode; and if the temperature difference is judged to be reduced to the third limit value, the air conditioner is controlled to be switched into the external circulation mode and the defrosting mode, and the air conditioner is controlled to be switched into the second compensation circulation mode and the defrosting mode until the temperature difference is judged to be increased to the third exit limit value.

When the initial value of the temperature difference is judged to be in the high-fogging risk interval, the air conditioner control device automatically starts the electric compressor or the PTC heating element according to the current working condition and controls the air conditioner to be in an external circulation mode and a defrosting mode; if the temperature difference is judged to be increased to the third exit limit value, the air conditioner is controlled to be switched into a second compensation circulation mode and a defrosting mode; if the temperature difference is judged to be continuously increased to the second exit limit value, the air conditioner is controlled to be switched into a first compensation circulation mode and a comfortable air outlet mode; and if the temperature difference is judged to be continuously increased to the first exit limit value, controlling the air conditioner to be switched into an internal circulation mode and a comfortable air outlet mode.

The embodiment of the application also provides an air conditioner control device based on the method, and the air conditioner control device comprises a first acquisition module, a second acquisition module and a control module.

The first acquisition module is used for acquiring the temperature of the front windshield and the dew point temperature, and taking the difference value of the temperature of the front windshield and the dew point temperature as a judgment temperature difference.

The second acquisition module is used for acquiring three unconnected temperature difference intervals and a plurality of fogging risk intervals under the working condition of the environment where the vehicle is located.

The control module is used for selecting a corresponding circulation mode and an air outlet mode according to the fogging risk interval where the initial value of the temperature difference is judged.

The control module is further used for switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval when the temperature difference is judged to be reduced to a high end value of any fogging risk interval; and when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value, switching to the circulation mode and the air outlet mode corresponding to the fogging risk interval where the high end value is located.

The air conditioner control device of the embodiment is suitable for the air conditioner control methods, the temperature difference is judged as main judgment and adjustment, the environment working conditions of the vehicle are combined, whether the air conditioner has a fogging risk is judged in real time, the multiple circulation modes of the air conditioner are reasonably utilized on the premise that the vehicle fogging is not caused, the external circulation use proportion is reduced according to different environment working conditions, the front windshield can be prevented from fogging, the air outlet mode is automatically adjusted, manual operation of a user is reduced, and the purpose of reducing the energy consumption of the air conditioner can be achieved.

The air conditioner control device of the embodiment can obtain different energy-saving effects on different vehicle types, and the energy-saving effects of the same vehicle type under different environmental differences such as different seasons and the like are different. In autumn and winter, the energy-saving effect is shown to be between 100W and 1000W according to different environments and vehicle working conditions by experiments under the condition that the internal circulation mode is the main circulation mode.

As shown in fig. 2, an embodiment of the present application further provides an air conditioning control system, where the system includes the air conditioning control device, and further includes a sunlight sensor, a temperature and humidity sensor, an external temperature sensor, and an automobile body controller.

The sunlight sensor is used for collecting the sunlight intensity and sending the sunlight intensity to the vehicle body controller; the temperature and humidity sensor is used for acquiring the temperature and the relative humidity of the front windshield, acquiring the dew point temperature based on the temperature and the relative humidity of the front windshield and sending the dew point temperature to the vehicle body controller; the external temperature sensor is used for acquiring the external temperature of the vehicle and sending the external temperature to the air conditioner control device.

And the automobile body controller is used for sending the sunlight intensity, the temperature of the front windshield, the relative humidity of the front windshield and the dew point temperature to the air conditioner control device through the CAN. The air conditioner control device is used for carrying out corresponding control based on the acquired data.

In this embodiment, the air conditioning control system further includes an electric compressor and a PTC heating element, and the air conditioning control device is further configured to perform corresponding control on the electric compressor and the PTC heating element based on the acquired data.

Optionally, an embodiment of the present application further provides an electronic device for controlling an air conditioner, where the electronic device includes a processor and a memory, and the processor executes codes in the memory to implement the following air conditioner control method:

acquiring the temperature of a front windshield and the dew point temperature, and taking the difference value of the temperature of the front windshield and the dew point temperature as a judgment temperature difference;

acquiring three unconnected temperature difference intervals under the working condition of the environment where the vehicle is located, wherein the second temperature difference interval is located between the low end value of the first temperature difference interval and the high end value of the third temperature difference interval; a fog risk interval is formed between the lower end values of the two adjacent temperature difference intervals, and the interval smaller than the lower end value of the third temperature difference interval is a fog risk interval;

selecting a corresponding circulation mode and an air outlet mode according to the fogging risk interval where the initial value of the temperature difference is judged;

when the temperature difference is judged to be reduced to the high end value of any fogging risk interval, switching to a circulation mode and an air outlet mode corresponding to the fogging risk interval;

and when the temperature difference is judged to be increased from the low end value of any temperature difference interval to the high end value, switching to the circulation mode and the air outlet mode corresponding to the fogging risk interval where the high end value is located.

Optionally, the processor executing the code in the memory may further implement the following air conditioner control method:

a low fogging risk interval is formed between the low end value of the second temperature difference interval and the low end value of the first temperature difference interval, a medium fogging risk interval is formed between the low end value of the third temperature difference interval and the low end value of the second temperature difference interval, and an interval smaller than or equal to the low end value of the third temperature difference interval is a high fogging risk interval.

Optionally, the processor executing the code in the memory may further implement the following air conditioner control method:

the circulation mode corresponding to the low fogging risk interval is a first compensation circulation mode, and the corresponding air outlet mode is a comfort air outlet mode; the compensation cycle mode is as follows: the air inlet of the air conditioner is in an internal and external circulation mixed air mode;

the circulation mode corresponding to the middle fogging risk interval is a second compensation circulation mode, and the corresponding air outlet mode is a defrosting mode; the internal circulation proportion of the second compensation circulation mode is smaller than that of the first compensation circulation mode;

the circulation mode corresponding to the high-fogging risk interval is an external circulation mode, and the corresponding air outlet mode is a defrosting mode.

Optionally, the processor executing the code in the memory may further implement the following air conditioner control method:

the above-mentioned three disconnected difference in temperature intervals of obtaining under the vehicle is located environmental condition specifically includes:

acquiring the current outside temperature, the sunlight intensity and the relative humidity of a front windshield;

looking up a table based on a prestored relation table to obtain a first compensation value, a second compensation value and a third compensation value under the outside temperature, the sunlight intensity and the relative humidity of the front windshield;

taking the sum of the first compensation value and a first preset value as a low end value of a first temperature difference interval, and taking the sum of the first compensation value and a second preset difference value as a high end value of the first temperature difference interval;

taking the sum of the second compensation value and a first preset value as a low end value of a second temperature difference interval, and taking the sum of the second compensation value and a second preset difference value as a high end value of the second temperature difference interval;

and taking the sum of the third compensation value and the first preset value as the low end value of the third temperature difference interval, and taking the sum of the third compensation value and the third preset difference value as the high end value of the third temperature difference interval.

Optionally, the processor executing the code in the memory may further implement the following air conditioner control method:

and when the initial value of the temperature difference is larger than the high end value of the first temperature difference interval, controlling the air conditioner to be in an internal circulation mode and a comfortable air outlet mode.

Optionally, the processor executing the code in the memory may further implement the following air conditioner control method:

before obtaining the temperature of the front windshield and the dew point temperature, judging whether the air conditioner is set to an AUTO operation mode, and if not, not obtaining the temperature of the front windshield and the dew point temperature.

Preferably, the processor executes the codes in the memory to realize other steps of the air conditioner control method.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are 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 above description is merely exemplary of the present application and is 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.