CN115246301A - Air conditioner control method and device and vehicle - Google Patents

Abstract

The invention provides an air conditioner control method, which comprises the following steps: acquiring the current vehicle working condition of the vehicle; matching the current vehicle working condition with a plurality of preset vehicle working conditions of the vehicle; when the target preset vehicle working condition in the multiple preset vehicle working conditions is matched, determining the current actual heat exchange amount of the vehicle; and when the actual heat exchange amount is smaller than the expected heat exchange amount corresponding to the target preset vehicle working condition, controlling a target component of the air conditioner to be converted from the current state to the expected state corresponding to the target preset vehicle working condition. According to the air conditioner control method, the air conditioner target component is controlled by judging the heat exchange quantity of the current working condition of the vehicle and the preset working condition of the vehicle, the adjusting time of the air conditioner target component is advanced to ensure that the air conditioner system dissipates heat in time, the problem that the air conditioner absorbs the air conditioner when the heat dissipation of the air conditioner system is not timely is avoided, and the comfort of a passenger compartment is ensured.

Description

Air conditioning control method, device and vehicle

technical field

The invention relates to the technical field of vehicles, in particular to an air conditioning control method, device and vehicle.

Background technique

The vehicle air-conditioning system is a device that cools, heats, ventilates and purifies the air in the vehicle compartment, provides a comfortable environment for the passengers, reduces the fatigue of the driver, and improves driving safety.

The cooling performance of the current vehicle air-conditioning system is mainly adjusted according to the compressor pressure, and the fan, AGS (Active Grille Shutter, intelligent intake grid system), etc. are adjusted according to the compressor pressure, so as to increase the heat dissipation of the condenser and meet the heat dissipation requirements of the air-conditioning system .

However, when the compressor pressure is adjusted, the adjustment can only be performed after the external conditions change and the compressor pressure changes to the corresponding adjustment range. However, it takes a certain amount of time for the compressor pressure to change from sensing external conditions to the corresponding adjustment range, and then to perform corresponding air conditioning control based on the compressor pressure change to this pressure range. Therefore, the actual adjustment time has a certain amount of time. If the air conditioner is running at full capacity, it may cause the air conditioner system to dissipate heat in time and cause the air conditioner to stop sucking, reducing the comfort of the passenger compartment.

SUMMARY OF THE INVENTION

In view of this, the present invention aims to propose an air-conditioning control method, device and vehicle to solve the problem that when the air-conditioning is running at full load, due to the delay in adjustment time, the air-conditioning system does not dissipate heat in time, causing the air-conditioning to stop sucking and reducing the comfort of the passenger compartment. question.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

An air conditioning control method, comprising:

Obtain the current vehicle condition of the vehicle;

matching the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle;

When matching the target preset vehicle operating conditions among the above-mentioned multiple preset vehicle operating conditions, determine the current actual heat transfer amount of the vehicle;

When the actual heat transfer is less than the expected heat transfer corresponding to the target preset vehicle operating condition, control the target component of the air conditioner from the current state to the expected state corresponding to the target preset vehicle operating condition; the air conditioner Targeted components include cooling fans and/or smart air intake grilles.

Further, the transition of the target component for controlling the air conditioner from the current state to the expected state corresponding to the target preset vehicle operating condition includes:

Controlling the cooling fan to be updated from the current duty cycle to the expected duty cycle corresponding to the target preset vehicle operating condition, and/or controlling the smart air intake grille to be updated from the current opening to the target preset vehicle The expected opening corresponding to the working condition.

Further, the method also includes:

When the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, control the air conditioner mode to switch from the current mode to the expected mode corresponding to the target preset vehicle operating condition.

Further, the method also includes:

Acquiring the pressure of the air-conditioning compressor of the vehicle when none of the current operating conditions of the vehicle match the plurality of preset vehicle operating conditions;

According to the pressure of the air conditioner compressor, the target component is controlled to switch from a current state to a corresponding state.

Further, the determining the current actual heat exchange rate of the vehicle includes:

Detecting the current inlet air temperature, outlet air temperature and front air speed of the vehicle condenser;

According to the inlet wind temperature, the outlet wind temperature and the front wind speed, the current actual heat transfer amount of the vehicle is determined.

Further, the method also includes:

Simulate a variety of different working conditions when the air conditioner is running at full load to obtain the various preset vehicle working conditions; determine the expected intake air temperature and expected air temperature of the condenser of the vehicle under each of the preset vehicle working conditions Outlet air temperature and expected air speed in front of the condenser;

According to the expected air inlet air temperature, the expected air outlet air temperature and the expected wind speed before the condenser, the expected heat transfer corresponding to each of the preset vehicle operating conditions is determined;

The expected state corresponding to the target component under each of the preset vehicle operating conditions is determined according to the expected heat transfer amount.

Further, the matching of the current vehicle operating conditions with various preset vehicle operating conditions of the vehicle includes:

The current driving speed, light intensity, ambient temperature and humidity of the vehicle are respectively matched with the driving speed, light intensity, ambient temperature and humidity of each of the preset vehicle operating conditions.

Further, the matching of the current driving speed, light intensity, ambient temperature and humidity of the vehicle with the driving speed, light intensity, ambient temperature and humidity of each of the preset vehicle operating conditions includes:

For each of the preset vehicle operating conditions, perform the following steps:

determining the difference between the current driving speed, light intensity, ambient temperature and humidity of the current vehicle working condition and the driving speed, light intensity, ambient temperature and humidity of the preset vehicle working condition;

Based on the difference, it is determined whether the current vehicle operating condition matches the preset vehicle operating condition.

Compared with the prior art, the air conditioning control method of the present invention has the following advantages:

The air conditioner control method of the present invention obtains the current vehicle working condition of the vehicle; matches the current vehicle working condition with various preset vehicle working conditions of the vehicle; and matches the various preset vehicle working conditions When the target preset vehicle operating condition in the vehicle condition, determine the current actual heat exchange amount of the vehicle; when the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, control the target The component is converted from the current state to the expected state corresponding to the target preset vehicle operating condition; the target component of the air conditioner includes a cooling fan and/or an intelligent air intake grill. The present invention judges the heat exchange condition of the vehicle by presetting the vehicle working condition and the corresponding preset heat exchange amount, and directly adjusts the air conditioning target components, so that the adjustment time of the air conditioning target components is advanced to when the external conditions change, that is, when the external If the conditions change, compare the actual heat transfer with the expected heat transfer corresponding to the preset vehicle operating conditions. The adjustment of the air conditioner target component is carried out directly. Thus, the air-conditioning system can dissipate heat in time, avoiding the problems of air-conditioning compressor stop working and air-conditioning cut-off caused by insufficient heat dissipation leading to system temperature rise, and ensuring the comfort of the passenger compartment.

According to the present invention, a variety of different working conditions are simulated when the air conditioner is running at full load, and the various preset vehicle working conditions are obtained; under each of the preset vehicle working conditions, the expected progress of the condenser of the vehicle is determined. Wind air temperature, expected air outlet air temperature, and expected wind speed in front of the condenser; according to the expected air inlet air temperature, expected air outlet air temperature, and expected wind speed in front of the condenser, determine the corresponding The expected heat transfer amount; according to the expected heat transfer amount, the expected state corresponding to the target component is determined under each of the preset vehicle operating conditions. The heat dissipation under different working conditions is calibrated in advance by means of simulation. The air-conditioning system is automatic air-conditioning and the internal and external circulation is in automatic mode, which can realize intelligent control of the air-conditioning, reduce the cooling demand of the air-conditioning system, and adjust the duty cycle of the cooling fan in advance. , The opening of the intelligent air intake grille improves the heat dissipation capacity of the air conditioning system and ensures the cooling demand of the air conditioning system.

Another object of the present invention is to provide an air conditioner control device to solve the problem that when the air conditioner is running at full load, due to the delay in adjustment time, the heat dissipation of the air conditioner system is not timely, resulting in the failure of the air conditioner and reducing the comfort of the passenger compartment.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

An air conditioner control device, comprising:

An acquisition module, configured to acquire the current vehicle operating condition of the vehicle;

A matching module, configured to match the current vehicle operating conditions with various preset vehicle operating conditions of the vehicle;

A determination module, configured to determine the current actual heat transfer amount of the vehicle when matching the target preset vehicle operating conditions among the various preset vehicle operating conditions;

A control module, configured to control the target components of the air conditioner to switch from the current state to the expected value corresponding to the target preset vehicle operating condition when the actual heat transfer amount is less than the expected heat transfer amount corresponding to the target preset vehicle operating condition. Status; the target components of the air conditioner include the cooling fan and/or the smart air intake grille.

The air-conditioning control device has the same advantages as the above-mentioned air-conditioning control method over the prior art, and will not be repeated here.

Another object of the present invention is to provide a vehicle to solve the problem that when the air conditioner is running at full load, due to the delay in adjustment time, the heat dissipation of the air conditioning system is not timely, resulting in the failure of the air conditioner and reducing the comfort of the passenger compartment.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A vehicle, comprising: a vehicle control unit configured to execute the above air conditioning control method.

The advantages of the vehicle and the above-mentioned air-conditioning control method over the prior art are the same, and will not be repeated here.

Description of drawings

The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a step diagram of the air-conditioning control method described in Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of a control flow of the air conditioner control method described in Embodiment 1 of the present invention;

3 is a schematic diagram of another control flow of the air-conditioning control method described in Embodiment 1 of the present invention;

Fig. 4 is a step diagram of an air conditioner control method according to another embodiment of the present invention;

Fig. 5 is a flow chart of a method for determining the preset vehicle operating conditions, expected heat transfer, and expected state of an air-conditioning target component according to another embodiment of the present invention;

Fig. 6 is a schematic structural diagram of the air conditioner control device according to the second embodiment of the present invention.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Example 1

Fig. 1 is a flow chart of an air-conditioning control method provided in Embodiment 1 of the present invention. As shown in Fig. 1, the method includes:

S101, acquiring the current vehicle working condition of the vehicle;

In the embodiment of the present invention, the current vehicle working condition of the vehicle can be acquired according to the built-in sensor of the vehicle body, or can be obtained by setting a separate sensor, which is not specifically limited in the present invention.

S102, matching the current vehicle working condition with various preset vehicle working conditions of the vehicle;

The current vehicle operating conditions can at least include the vehicle operating conditions related to the control of the air conditioning system. For example, the driving speed of the vehicle and the external temperature are both vehicle operating conditions related to the control of the air conditioning system, then the driving speed of the vehicle and the external temperature can be obtained as the current vehicle operating conditions. working conditions.

When matching, if the current vehicle operating condition includes multiple operating conditions, each operating condition of the current vehicle operating condition may be compared with each operating condition in the preset vehicle operating conditions.

For example, the method for matching the current vehicle operating condition with multiple preset vehicle operating conditions includes matching the current vehicle driving speed and ambient temperature with the driving speed and ambient temperature in each preset vehicle operating condition.

S103. When the current vehicle operating condition matches the target preset vehicle operating condition among the plurality of preset vehicle operating conditions, determine the current actual heat transfer amount of the vehicle;

In the embodiment of the present invention, when the current vehicle speed and the ambient temperature of the vehicle match the vehicle speed and the ambient temperature of the preset vehicle operating condition in a one-to-one correspondence, it is considered that the current vehicle operating condition matches the target preset vehicle operating condition. For example, acquired by the sensor, the current driving speed of the vehicle is 40kph, and the ambient temperature is 40°C. This operating condition is compared with the stored preset vehicle operating conditions one by one. When the stored preset vehicle operating conditions match the Similarly, when the driving speed is 40kph and the ambient temperature is 40°C, it is considered that the current vehicle driving condition matches the preset vehicle working condition among the preset vehicle working conditions.

In the embodiment of the present invention, determining the actual heat transfer of the vehicle needs to be calculated according to the parameters of the condenser.

S104. When the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, control the target component of the air conditioner to switch from the current state to the expected state corresponding to the target preset vehicle operating condition.

In the embodiment of the present invention, the target component of the air conditioner includes a cooling fan and/or an intelligent air intake grille, and the purpose of controlling the state of the target component of the air conditioner is to make the heat dissipation of the air conditioning system reach the expected heat exchange rate, then the controlled air conditioner The target components are those related to the heat dissipation of the air conditioning system. For example, the target component of the air conditioner may be only the cooling fan or only the smart air intake grill, or may include both the cooling fan and the smart air intake grill, which is not specifically limited in the present invention.

In the embodiment of the present invention, the purpose of determining the actual heat transfer and the expected heat transfer is to determine whether the heat dissipation of the current condenser can reach the heat dissipation required by the air conditioning system. If the actual heat transfer is less than the expected heat transfer, then It shows that the heat dissipation at this time cannot meet the heat dissipation required by the air-conditioning system after the external conditions change, and there is a risk that the air-conditioning compressor will stop working. Therefore, at this time, the state of the air-conditioning components needs to be converted from the current state to the expected state. If the actual heat transfer is greater than or equal to the expected heat transfer, it means that the current heat dissipation can meet the heat dissipation required by the air-conditioning system after the external conditions change. At this time, the air-conditioning components are still adjusted according to the pressure of the air-conditioning compressor.

Fig. 2 is a schematic diagram of a control flow of the air-conditioning control method in Embodiment 1 of the present invention. As shown in Fig. 2, the vehicle speed and environmental conditions (illumination intensity, ambient temperature and humidity) in Fig. 2 are vehicle parameters obtained in real time during actual driving The air conditioner thermal management calibration working condition is the expected heat dissipation of the air conditioner under the vehicle operating conditions, the electronic fan is the cooling fan, and the smart grille is the smart air intake grille. Specifically include the following processes:

First, the actual vehicle speed and environmental conditions of the vehicle are obtained. The environmental conditions are mainly the current light intensity, ambient temperature and humidity. After obtaining the actual vehicle speed and environmental conditions of the vehicle, the vehicle is matched according to the preset vehicle speed and environmental conditions.

Next, determine the corresponding calibration working condition of the thermal management of the air conditioner; match the preset vehicle working condition according to the actual vehicle working condition, that is, the actual vehicle speed, and the environmental condition, that is, the preset vehicle speed and the environmental condition.

Afterwards, the duty cycle of the electronic fan, the mode of the air conditioner and the opening of the smart grille are adjusted according to the calibration conditions of the thermal management of the air conditioner. When the preset vehicle operating conditions matching the actual vehicle operating conditions are determined, the expected heat transfer corresponding to the preset vehicle operating conditions can be determined. According to the expected heat transfer, the expected state of the air-conditioning components can be confirmed. For heat, adjust the electronic fan to the corresponding duty cycle, adjust the air conditioning mode to the corresponding mode, and adjust the smart grille to the corresponding opening.

Fig. 3 is a schematic diagram of another control flow of the air-conditioning control method in Embodiment 1 of the present invention. As shown in Fig. 3, the vehicle speed, light intensity, ambient temperature and humidity in Fig. 3 are vehicle operating conditions obtained in real time during actual driving, and the air-conditioning The thermal management calibration conditions include the expected heat transfer of the air conditioner under the vehicle operating conditions, and the corresponding expected duty cycle of the electronic fan, the expected opening of the smart grille and the expected air conditioning mode. The electronic fan is a cooling fan, and the relay is The relay part of the working condition signal, when it is determined that the actual heat transfer is less than the expected heat transfer of the preset vehicle working condition, the thermal management of the air conditioner will be calibrated to the working condition, that is, the expected duty cycle of the electronic fan and the expected opening of the smart grille The expected mode of the air conditioner is sent to the controller corresponding to the target component through the relay; the controller is used to control the corresponding air conditioner component, the controller 1 is used to control the duty cycle of the electronic fan, and the controller 2 is used to control the mode of the air conditioner. The controller 3 is used to control the opening degree of the smart grid. The specific process includes:

First, determine the current vehicle speed, light intensity, and ambient temperature and humidity, and compare the current vehicle speed, light intensity, and ambient temperature and humidity with the preset vehicle speed, light intensity, and ambient temperature and humidity set in the vehicle. to match.

Next, after matching the preset vehicle’s driving speed, light intensity, and ambient temperature and humidity, it is judged whether the actual heat transfer in the actual thermal management condition is less than the expected heat transfer in the pre-calibrated thermal management condition, If the actual heat transfer is not less than the expected heat transfer, it is still regulated by the compressor pressure of the air conditioner. By pre-determining the duty cycle of the cooling fan, the opening degree of the smart grille and the air conditioner mode corresponding to the pressure range of the air conditioner compressor, In the actual process, when the air conditioner compressor reaches this range, the cooling fan is adjusted to the corresponding duty cycle, the smart grill is adjusted to the corresponding opening, and the air conditioner is adjusted to the corresponding mode.

If the actual heat transfer is less than the expected heat transfer, the expected duty cycle of the cooling fan corresponding to the preset vehicle operating condition, the expected opening of the smart grille, and the expected air-conditioning mode are sent to the relay, and the relay sends the The control signal is correspondingly sent to the controllers of the cooling fan, smart grille and air conditioner, and the controller controls the corresponding cooling fan, smart grille and air conditioner to adjust to the expected cooling fan duty cycle, expected smart grille opening degree and expected air conditioner mode.

In the embodiment of the present invention, by matching the current vehicle working condition with the preset vehicle working condition, and when the current vehicle working condition matches the preset vehicle working condition, the actual heat transfer amount of the vehicle is determined, and by determining the actual heat transfer Whether the quantity meets the demand heat exchange, directly converts the state of the air-conditioning components, so that the adjustment time of the air-conditioning components is advanced to when the vehicle’s working conditions change, so that the air-conditioning system can adjust to the expected heat exchange in advance and dissipate heat in time, avoiding insufficient heat dissipation As a result, the temperature of the system rises, causing the air conditioner compressor to stop working and the air conditioner to stop suction, which improves the comfort of the passenger compartment.

Referring to FIG. 4, FIG. 4 is a flowchart of an air-conditioning control method provided by another embodiment of the present invention. As shown in FIG. 4, the method includes:

S401, acquiring the current vehicle working condition of the vehicle;

In the embodiment of the present invention, the current vehicle working condition of the vehicle includes the current driving speed of the vehicle, the light intensity at the current location, the ambient temperature and the humidity.

S402, determining the difference between the current driving speed, light intensity, ambient temperature and humidity of the current vehicle working condition and the driving speed, light intensity, ambient temperature and humidity of the preset vehicle working condition;

In the embodiment of the present invention, there is a range for the influence of the change of the working conditions of the vehicle on the heat dissipation of the air conditioner, that is, when the heat dissipation of the air conditioner changes within the range, the heat dissipation of the air conditioner is the same, so after the definite value of the preset vehicle working condition is calibrated , a certain value within its left and right ranges is regarded as the calibration preset vehicle operating condition. Therefore, in the actual vehicle driving process, it is necessary to determine the difference between the current vehicle operating condition and the preset vehicle operating condition. The specific difference range depends on the vehicle The heat dissipation situation is determined, and the present invention does not make specific limitations. For example, the current vehicle operating conditions are vehicle speed of 42kph, light intensity of 1000W/m ² , ambient temperature of 40°C, and relative humidity of 50%. Match it with various preset vehicle operating conditions to determine the preset vehicle In the working condition, the vehicle speed is 40kph, the light intensity is 1000W/m ² , the ambient temperature is 40°C, and the relative humidity is 50%, so the difference is determined to be 2kph.

S403. Based on the difference, determine whether the current vehicle operating condition matches the preset vehicle operating condition;

In the embodiment of the present invention, the difference is compared with the set difference. If it is smaller than the set difference, it indicates that the difference between the two is small, and then they can match. If it is greater than the set difference, it indicates that the difference between the two is large, then Can't match.

The specific setting difference is set by the heat dissipation of the vehicle air conditioner, which can be limited by setting the difference of driving speed, light intensity, ambient temperature and humidity, that is, only setting speed difference, light intensity difference, etc., or by Set the multiple differences in driving speed, light intensity, ambient temperature and humidity to limit, for example, limit by the difference between speed and light intensity, and the difference between speed and ambient temperature.

For example, the current vehicle operating conditions are vehicle speed of 42kph, light intensity of 1000W/m ² , ambient temperature of 40°C, and relative humidity of 50%, and match it with various preset vehicle operating conditions to determine the preset In the vehicle working condition, the vehicle running speed is 40kph, the light intensity is 1000W/m ² , the ambient temperature is 40°C, the relative humidity is 50%, and the difference between the current vehicle working condition and the vehicle running speed is 2kph, which is less than the set difference of 5kph, then the current vehicle working condition is determined It is matched with one of the various preset vehicle operating conditions.

S404. When the current vehicle operating condition matches the target preset vehicle operating condition, detect the current air inlet air temperature, air outlet air temperature, and front air speed of the condenser;

The air inlet temperature of the condenser indicates the temperature of the air at the inlet of the condenser, which is generally the temperature of the wind entering from the outside during the driving of the vehicle, while the air temperature of the condenser air outlet indicates the temperature of the air outlet from the condenser, which is generally the temperature of the air that passes through the condenser. The wind temperature after heating, the wind speed in front of the condenser indicates the speed of the wind blowing in front of the condenser, the wind blowing through the condenser will take away part of the heat of the coolant in the condenser, thereby reducing the temperature of the coolant in the condenser, Therefore, the detected air temperature and wind speed of the air in and out of the condenser can obtain the heat transfer amount of the condenser.

In the embodiment of the present invention, the detection of the current air inlet air temperature, air outlet air temperature, and front wind speed of the condenser can be obtained by the vehicle's own sensor, or can be obtained by resetting the sensor, which is not specifically limited in the present invention.

S405. Determine the current actual heat transfer amount of the vehicle according to the temperature of the incoming and outgoing wind and the front wind speed;

In the embodiment of the present invention, the current actual heat transfer of the vehicle is determined according to the current air temperature of the air entering and exiting the vehicle condenser and the front wind speed, and the actual acquired air temperature of the air entering and exiting the vehicle condenser and the front wind speed are calculated according to the following calculation formula (1 ) to calculate heat transfer Q:

Q＝C×V×S×(T ₂ -T ₁ ) (1)

Among them, C is the specific heat capacity of air, V is the wind speed in front of the condenser, S is the heat exchange area of the condenser, T ₂ is the air temperature of the condenser outlet, and T ₁ is the air temperature of the condenser air.

In the embodiment of the present invention, if the current vehicle operating condition does not match any of the preset vehicle operating conditions, it indicates that the vehicle air conditioner is not operating at full load. In this case, according to the air conditioner compressor to adjust the pressure. The specific adjustment method is: calculate the duty cycle of the cooling fan corresponding to the preset pressure ranges of various air conditioner compressors and the opening of the intelligent air intake grille, etc., when the pressure of the air conditioner compressor is detected to be within the preset range, adjust the cooling The duty cycle of the fan to the duty cycle corresponding to the pressure range, and the adjustment of the opening of the smart air intake grille to the opening corresponding to the pressure range, etc.

S406. When the actual heat transfer amount is less than the expected heat transfer amount corresponding to the target preset vehicle operating condition, control the target component of the air conditioner to switch from the current state to the expected state corresponding to the target preset vehicle operating condition.

In the embodiment of the present invention, when the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, the air conditioner mode may also be controlled to switch from the current mode to the expected mode corresponding to the target preset vehicle operating condition. By controlling the duty cycle of the cooling fan and the opening of the AGS, the heat dissipation of the air-conditioning system can be increased to meet the heat dissipation demand of the air-conditioning system, and the heat dissipation demand of the air-conditioning system can be reduced by controlling the conversion of the air-conditioning mode, so that the heat dissipation of the vehicle can reach The required heat dissipation, so as to avoid the situation that the air conditioner does not stop suction.

In some examples, the actual heat transfer is represented by the temperature difference between the current inlet and outlet air temperatures of the condenser. At this time, according to the obtained wind speed in front of the condenser and the expected heat transfer Q ₀ corresponding to the target preset vehicle operating conditions Calculate the temperature difference between the inlet and outlet air of the condenser, the specific calculation formula (2) is as follows:

ΔT=Q ₀ /(C×V×S) (2)

Among them, ΔT is the preset temperature difference, C is the specific heat capacity of the air, V is the acquired wind speed in front of the condenser, and S is the heat exchange area of the condenser.

When the actual temperature difference between the inlet and outlet air of the condenser is smaller than the expected temperature difference, it is considered that the actual heat transfer is smaller than the expected heat transfer corresponding to the target preset vehicle operating condition. For example, when the ambient temperature is 40°C, the light intensity is 1050W/m ² , and the vehicle speed is 40kph, it is determined that the current working condition of the vehicle matches the preset working condition, and the corresponding preset heat transfer amount is determined according to the preset working condition as 5.9KW, the wind speed in front of the condenser is detected to be 2m/s, the air temperature of the air inlet to the condenser is 42.2°C, and the air temperature of the air outlet is 45.2°C, the corresponding preset temperature difference is calculated to be 10°C, and the actual The temperature difference is 3°C, the calculation shows that the actual temperature difference of the condenser is less than the preset temperature difference, then it is determined that the current actual heat transfer of the vehicle is less than the expected heat transfer under the corresponding working conditions, and then the duty cycle of the cooling fan is controlled to 65%, and Control the opening of the intelligent air intake grille to 100%.

In the embodiment of the present invention, the fact that the actual heat transfer is less than the expected heat transfer corresponding to the target preset vehicle working condition indicates that the actual heat transfer cannot reach the required heat transfer for the vehicle working condition. If the heat exchange rate is not increased in time, the temperature of the air-conditioning system will rise, causing the air-conditioning compressor to stop working and the air-conditioning to stop suction.

In the embodiment of the present invention, if the actual heat transfer is greater than or equal to the expected heat transfer corresponding to the target preset vehicle operating condition, it indicates that the heat dissipation of the condenser can meet the heat dissipation system of the air conditioning system. The air conditioner compressor pressure is adjusted.

In the embodiment of the present invention, the methods for determining the preset vehicle operating conditions, the expected heat transfer, and the expected state of the air-conditioning components are described in detail below:

In the embodiment of the present invention, as shown in FIG. 5, FIG. 5 shows a method for determining the preset vehicle operating conditions and expected heat transfer of the air conditioner, and the expected state of the air conditioner target components in another embodiment of the present invention, including:

S501, simulating a variety of different working conditions when the air conditioner is running at full load, and obtaining the various preset vehicle working conditions;

In the embodiment of the present invention, by using the vehicle simulation model to simulate a variety of different working conditions when the air conditioner is running at full load in the vehicle design stage, the various working conditions include the driving speed of the vehicle, the intensity of light, the ambient temperature and humidity, etc. Condenser heat dissipation has an effect on vehicle operating conditions.

In the embodiment of the present invention, the full-load operation of the air conditioner includes the state where the air conditioner is operating with the maximum cooling effect or the maximum heating effect, and may also be the state where the air conditioner is operating at the maximum power, which is not specifically limited in the present invention;

S502. Determine the expected air intake air temperature, the expected air outlet air temperature, and the expected wind speed in front of the condenser of the vehicle's condenser under each of the preset vehicle operating conditions;

In the embodiment of the present invention, the heat dissipation required by the condenser for each preset vehicle operating condition is different, so it is necessary to determine the expected inlet air temperature and expected outlet air temperature of the vehicle condenser under each preset vehicle operating condition. Air temperature and expected condenser front air velocity.

S503. Determine the expected heat transfer corresponding to each of the preset vehicle operating conditions according to the expected air inlet temperature, the expected air outlet temperature, and the expected wind speed in front of the condenser;

In the embodiment of the present invention, the expected air temperature of the inlet air of the condenser, the expected air temperature of the air outlet of the condenser and the expected wind speed in front of the condenser obtained in step S502, combined with the heat exchange area of the condenser, can be obtained under the vehicle working condition The expected heat transfer is calculated and corresponding to the expected heat transfer of each preset vehicle operating condition, and then a heat dissipation table corresponding to each vehicle operating condition and heat dissipation can be formed.

S504. Determine the expected state corresponding to the target component under each of the preset vehicle operating conditions according to the expected heat transfer amount.

In the embodiment of the present invention, the corresponding state of the air-conditioning target component is determined by the expected heat transfer, and the obtained state of the air-conditioning target component is corresponding to the vehicle operating condition to obtain a comparison table between the preset vehicle operating condition and the expected state of the target component, as follows As shown in Table 1 and Table 2 below, they respectively represent a comparison table of various preset vehicle operating conditions and fan duty ratios, and a comparison table of various preset vehicle operating conditions and the opening of the smart grille. In the embodiment of the present invention, the expected mode corresponding to the air conditioner can also be determined according to the expected exchange amount, and similarly, various preset vehicle operating conditions are stored corresponding to the expected mode of the air conditioner.

Table 1 Comparison table of various preset vehicle operating conditions and fan duty cycle

Table 2 Comparison table of various preset vehicle operating conditions and smart grille opening

In the embodiment of the present invention, by matching the current vehicle working condition with the preset vehicle working condition, and when the current vehicle working condition matches the preset vehicle working condition, determining the actual heat transfer or actual temperature difference of the vehicle, by determining Whether the actual heat transfer or actual temperature difference of the vehicle meets the demand, directly converts the state of the air conditioning components. At the same time, since the vehicle operating conditions under the condition of full-load operation of the air conditioner are pre-set, and the expected heat transfer and the expected state of the air-conditioning components under each vehicle operating condition are determined, the vehicle air conditioner can be activated during actual vehicle driving. When running at full load, the state of the air-conditioning components is directly controlled by judging the working conditions, and the adjustment time of the air-conditioning components is advanced to when the working conditions change, so that the air-conditioning system can adjust to the required heat dissipation in advance and dissipate heat in time, avoiding insufficient heat dissipation that causes the system to The temperature rise caused the air conditioner compressor to stop working and the air conditioner to stop suction, which improved the comfort of the passenger compartment.

Embodiment 2

Fig. 6 is a schematic structural diagram of an air-conditioning control device provided in Embodiment 2 of the present invention. As shown in Fig. 6, the air-conditioning control device includes:

An acquisition module 601, configured to acquire the current vehicle operating condition of the vehicle;

A matching module 602, configured to match the current vehicle operating conditions with various preset vehicle operating conditions of the vehicle;

A determining module 603, configured to determine the current actual heat transfer amount of the vehicle when matching the target preset vehicle operating conditions among the various preset vehicle operating conditions;

The control module 604 is configured to control the target components of the air conditioner to switch from the current state to the target component corresponding to the target preset vehicle working condition when the actual heat transfer is less than the expected heat transfer corresponding to the target preset vehicle working condition. Expected state; the target components of the air conditioner include cooling fans and/or smart air intake grilles.

Optionally, the air conditioning control device further includes:

A control submodule, configured to control the air-conditioning mode to switch from the current mode to the expected mode corresponding to the target preset vehicle operating condition when the actual heat transfer amount is less than the expected heat transfer amount corresponding to the target preset vehicle operating condition .

Optionally, the air conditioning control device further includes:

A second acquiring module, configured to acquire the pressure of the air-conditioning compressor of the vehicle when the current working conditions of the vehicle do not match the various preset vehicle working conditions;

The second control module is configured to control the target component to switch from a current state to a corresponding state according to the pressure of the air-conditioning compressor.

Optionally, the determining module 603 also includes:

A detection module, used to detect the current air inlet temperature, outlet air temperature and front wind speed of the vehicle condenser;

The determination sub-module is used to determine the current actual heat exchange amount of the vehicle according to the inlet air temperature, outlet air temperature and front wind speed.

Optionally, the air conditioning control device further includes:

A storage module, configured to store the expected heat exchange amount corresponding to each of the preset vehicle operating conditions, and the expected state corresponding to the target component under each of the preset vehicle operating conditions.

Optionally, the matching module 602 also includes:

The second determining module is used to determine the difference between the current driving speed, light intensity, ambient temperature and humidity of the current vehicle working condition and the running speed, light intensity, ambient temperature and humidity of the preset vehicle working condition;

A matching submodule, configured to determine whether the current vehicle operating condition matches the preset vehicle operating condition based on the difference.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection;

For the method embodiment, for the sake of simple description, it is expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps Other sequences or concurrently may be used. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and components involved are not necessarily required by the present invention.

The air-conditioning control method, device and vehicle provided by the present invention have been introduced in detail above. In this paper, specific examples have been used to illustrate the principle and implementation of the present invention. The descriptions of the above embodiments are only used to help understand the present invention. method and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be understood as Limitations on the Invention.

Claims (10)

1. An air-conditioning control method, characterized in that the method comprises: Obtain the current vehicle condition of the vehicle; matching the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle; When matching the target preset vehicle operating conditions among the above-mentioned multiple preset vehicle operating conditions, determine the current actual heat transfer amount of the vehicle; When the actual heat transfer is less than the expected heat transfer corresponding to the target preset vehicle operating condition, control the target component of the air conditioner from the current state to the expected state corresponding to the target preset vehicle operating condition; the air conditioner Targeted components include cooling fans and/or smart air intake grilles. 2. The air-conditioning control method according to claim 1, wherein the conversion of the target component for controlling the air-conditioning from a current state to an expected state corresponding to the target preset vehicle operating condition comprises: controlling the cooling fan to be updated from the current duty cycle to the expected duty cycle corresponding to the target preset vehicle operating condition, and/or controlling the smart air intake grille to be updated from the current opening degree to the target preset vehicle The expected opening corresponding to the working condition. 3. The air conditioning control method according to claim 1, characterized in that the method further comprises: When the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, control the air conditioner mode to switch from the current mode to the expected mode corresponding to the target preset vehicle operating condition. 4. The air conditioning control method according to claim 1, further comprising: Acquiring the pressure of the air-conditioning compressor of the vehicle when none of the current operating conditions of the vehicle match the plurality of preset vehicle operating conditions; According to the pressure of the air conditioner compressor, the target component is controlled to switch from a current state to a corresponding state. 5. The air-conditioning control method according to claim 1, wherein the determining the current actual heat exchange rate of the vehicle comprises: Detecting the current inlet air temperature, outlet air temperature and front air speed of the vehicle condenser; According to the inlet wind temperature, the outlet wind temperature and the front wind speed, the current actual heat transfer amount of the vehicle is determined. 6. The air conditioning control method according to claim 1, further comprising: Simulating a variety of different working conditions when the air conditioner is running at full load to obtain the various preset vehicle working conditions; Determining the expected air intake air temperature, the expected air outlet air temperature, and the expected wind speed in front of the condenser of the vehicle's condenser under each of the preset vehicle operating conditions; According to the expected air inlet temperature, the expected air outlet temperature and the expected wind speed before the condenser, the expected heat transfer corresponding to each of the preset vehicle operating conditions is determined; The expected state corresponding to the target component under each of the preset vehicle operating conditions is determined according to the expected heat transfer amount. 7. The air-conditioning control method according to claim 1, wherein the matching the current vehicle working condition with various preset vehicle working conditions of the vehicle comprises: The current driving speed, light intensity, ambient temperature and humidity of the vehicle are respectively matched with the driving speed, light intensity, ambient temperature and humidity of each of the preset vehicle operating conditions. 8. The air-conditioning control method according to claim 1, wherein the current driving speed, light intensity, ambient temperature and humidity of the vehicle are respectively compared with the driving speed of each of the preset vehicle operating conditions. , light intensity, ambient temperature and humidity, including: For each of the preset vehicle operating conditions, perform the following steps: determining the difference between the current driving speed, light intensity, ambient temperature and humidity of the current vehicle working condition and the driving speed, light intensity, ambient temperature and humidity of the preset vehicle working condition; Based on the difference, it is determined whether the current vehicle operating condition matches the preset vehicle operating condition. 9. An air conditioner control device, characterized in that the device comprises: An acquisition module, configured to acquire the current vehicle operating condition of the vehicle; A matching module, configured to match the current vehicle operating conditions with various preset vehicle operating conditions of the vehicle; A determination module, configured to determine the current actual heat transfer amount of the vehicle when matching the target preset vehicle operating conditions among the various preset vehicle operating conditions; A control module, configured to control the target components of the air conditioner to switch from the current state to the expected value corresponding to the target preset vehicle operating condition when the actual heat transfer amount is less than the expected heat transfer amount corresponding to the target preset vehicle operating condition. Status; the target components of the air conditioner include the cooling fan and/or the smart air intake grille. 10. A vehicle, characterized by comprising: a vehicle control unit configured to execute the air-conditioning control method according to any one of claims 1-8.

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