Air conditioning control method, device and vehicle

Abstract

The present invention provides an air conditioning control method, the method comprising: obtaining the current vehicle operating condition of a vehicle; matching the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle; determining the current actual heat exchange of the vehicle when matching the target preset vehicle operating condition among the plurality of preset vehicle operating conditions; when the actual heat exchange is less than the expected heat exchange corresponding to the target preset vehicle operating condition, controlling the target component of the air conditioning to be converted from the current state to the expected state corresponding to the target preset vehicle operating condition. The air conditioning control method of the present invention controls the target component of the air conditioning by judging the heat exchange between the current vehicle operating condition and the preset vehicle operating condition, and advances the adjustment time of the target component of the air conditioning to ensure that the air conditioning system dissipates heat in time, thereby avoiding the problem of air conditioning suction interruption due to untimely heat dissipation of the air conditioning system, and ensuring the comfort of the passenger compartment.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an air-conditioning control method, device and vehicle. Background Art

[0002] The vehicle air conditioning system is a device that cools, heats, ventilates and purifies the air in the vehicle compartment, providing a comfortable riding environment for passengers, reducing driver fatigue and improving driving safety.

[0003] The cooling performance of the current vehicle air-conditioning system is mainly adjusted according to the compressor pressure. The fan, AGS (Active Grille Shutter, intelligent air intake grille system), etc. are adjusted according to the compressor pressure, thereby increasing the heat dissipation of the condenser to meet the heat dissipation needs of the air-conditioning system.

[0004] However, the compressor pressure regulation requires that the compressor pressure changes to the corresponding regulation range after the external conditions change before it can be regulated. The compressor pressure has a certain reaction time from sensing the change of external conditions to changing to the corresponding regulation range, and then to the corresponding air conditioning control based on the change of the compressor pressure to this pressure range. Therefore, the actual adjustment time has a certain delay. If the air conditioner is running at full load, it may cause the air conditioning system to not dissipate heat in time and cause the air conditioning to stop absorbing, reducing the comfort of the passenger compartment. Summary of the invention

[0005] 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, the air conditioning system cannot dissipate heat in time due to adjustment time delay, resulting in air conditioning suction interruption and reduced passenger cabin comfort.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] An air conditioning control method, comprising:

[0008] Get the current vehicle operating condition of the vehicle;

[0009] matching the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle;

[0010] When a target preset vehicle operating condition among the plurality of preset vehicle operating conditions is matched, determining a current actual heat exchange amount of the vehicle;

[0011] When the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, the target component of the air conditioner is controlled to be converted from a current state to an 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 grille.

[0012] Furthermore, the target component for controlling the air conditioner is converted from a current state to an expected state corresponding to the target preset vehicle operating condition, including:

[0013] The cooling fan is controlled to update the current duty cycle to the expected duty cycle corresponding to the target preset vehicle operating condition, and / or the smart air intake grille is controlled to update the current opening to the expected opening corresponding to the target preset vehicle operating condition.

[0014] Furthermore, the method further comprises:

[0015] When the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, the air conditioning mode is controlled to be converted from the current mode to the expected mode corresponding to the target preset vehicle operating condition.

[0016] Furthermore, the method further comprises:

[0017] When the current operating conditions of the vehicle do not match the plurality of preset vehicle operating conditions, obtaining the pressure of the air-conditioning compressor of the vehicle;

[0018] According to the pressure of the air-conditioning compressor, the target component is controlled to be converted from a current state to a corresponding state.

[0019] Further, the determining the current actual heat exchange amount of the vehicle includes:

[0020] Detecting the current inlet air temperature, outlet air temperature and front wind speed of the vehicle condenser;

[0021] The actual heat exchange amount of the vehicle is determined according to the inlet air temperature, the outlet air temperature and the front wind speed.

[0022] Furthermore, the method further comprises:

[0023] Simulating a plurality of different operating conditions when the air conditioner is running at full load to obtain the plurality of preset vehicle operating conditions; determining the expected inlet air temperature, the expected outlet air temperature and the expected wind speed before the condenser of the vehicle under each of the preset vehicle operating conditions;

[0024] Determining the expected heat exchange amount corresponding to each of the preset vehicle operating conditions according to the expected inlet air temperature, the expected outlet air temperature, and the expected wind speed before the condenser;

[0025] The expected state corresponding to the target component under each of the preset vehicle operating conditions is determined according to the expected heat exchange amount.

[0026] Furthermore, matching the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle includes:

[0027] The current driving speed, light intensity, ambient temperature and humidity of the vehicle are matched with the driving speed, light intensity, ambient temperature and humidity of each preset vehicle operating condition.

[0028] Furthermore, matching 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 preset vehicle operating condition, respectively, includes:

[0029] For each of the preset vehicle operating conditions, perform the following steps:

[0030] Determining the difference between the current driving speed, light intensity, ambient temperature and humidity of the current vehicle operating condition and the driving speed, light intensity, ambient temperature and humidity of the preset vehicle operating condition;

[0031] Based on the difference, it is determined whether the current vehicle operating condition matches the preset vehicle operating condition.

[0032] Compared with the prior art, the air conditioning control method of the present invention has the following advantages:

[0033] The air conditioning control method of the present invention obtains the current vehicle operating condition of the vehicle; matches the current vehicle operating condition with multiple preset vehicle operating conditions of the vehicle; when the target preset vehicle operating condition among the multiple preset vehicle operating conditions is matched, the current actual heat exchange of the vehicle is determined; when the actual heat exchange is less than the expected heat exchange corresponding to the target preset vehicle operating condition, the target component of the air conditioning is controlled to be converted from the current state to the expected state corresponding to the target preset vehicle operating condition; the target component of the air conditioning includes a cooling fan and / or an intelligent air intake grille. The present invention judges the heat exchange condition of the vehicle by presetting the vehicle operating condition and the corresponding preset heat exchange amount and directly adjusts the target component of the air conditioning, and advances the adjustment time of the target component of the air conditioning to when the external conditions change, that is, when the external conditions change, the actual heat exchange is compared with the expected heat exchange corresponding to the preset vehicle operating condition, and when the actual heat exchange does not reach the expected heat exchange, the target component of the air conditioning is directly adjusted according to the expected state of the target component corresponding to the preset vehicle operating condition. Thereby, the air conditioning system can dissipate heat in time, avoiding the problem of the air conditioning compressor stopping working and the air conditioning stopping suction caused by insufficient heat dissipation leading to the rise of system temperature, and ensuring the comfort of the passenger compartment.

[0034] The present invention simulates 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 air inlet temperature, expected air outlet temperature and expected wind speed before the condenser of the vehicle under each of the preset vehicle working conditions; determine the expected heat exchange corresponding to each of the preset vehicle working conditions based on the expected air inlet temperature, expected air outlet temperature and expected wind speed before the condenser; determine the expected state corresponding to the target component under each of the preset vehicle working conditions based on the expected heat exchange. The heat dissipation under different working conditions is calibrated in advance by simulation means. The air conditioning system is an automatic air conditioning system and the internal and external circulation is in automatic mode. It can realize intelligent control of the air conditioning, reduce the cooling demand of the air conditioning system, and can adjust the duty cycle of the cooling fan and the opening of the intelligent air intake grille in advance, thereby improving the heat dissipation capacity of the air conditioning system and ensuring the cooling demand of the air conditioning system.

[0035] Another object of the present invention is to provide an air conditioning control device 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 cannot dissipate heat in time, causing the air conditioning to stop sucking and reducing the comfort of the passenger compartment.

[0036] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0037] An air conditioning control device, comprising:

[0038] An acquisition module, used to acquire the current vehicle operating condition of the vehicle;

[0039] a matching module, configured to match the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle;

[0040] A determination module, configured to determine a current actual heat exchange amount of the vehicle when a target preset vehicle operating condition among the plurality of preset vehicle operating conditions is matched;

[0041] A control module is used to control the target components of the air conditioner to switch from a current state to an expected state corresponding to the target preset vehicle operating condition when the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition; the target components of the air conditioner include a cooling fan and / or an intelligent air intake grille.

[0042] The advantages of the air conditioning control device and the air conditioning control method described above over the prior art are the same, and will not be described in detail herein.

[0043] 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 air conditioning system cannot dissipate heat in time, causing the air conditioning to stop sucking and reducing the comfort of the passenger compartment.

[0044] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0045] A vehicle comprises: a vehicle control unit, wherein the vehicle control unit is used to execute the above-mentioned air conditioning control method.

[0046] The advantages of the vehicle and the above-mentioned air conditioning control method over the prior art are the same, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0048] Figure 1 This is a step diagram of the air conditioning control method according to the first embodiment of the present invention;

[0049] Figure 2 A control flow diagram of the air conditioning control method according to the first embodiment of the present invention;

[0050] Figure 3 Another control flow diagram of the air conditioning control method according to the first embodiment of the present invention;

[0051] Figure 4 A step diagram of an air conditioning control method according to another embodiment of the present invention;

[0052] Figure 5 A flowchart of a method for determining a preset vehicle operating condition of an air conditioner and an expected heat exchange amount and an expected state of an air conditioner target component according to another embodiment of the present invention;

[0053] Figure 6 This is a schematic diagram of the structure of the air conditioning control device according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0054] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0055] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0056] Embodiment 1

[0057] Figure 1 is a flow chart of an air conditioning control method provided in Example 1 of the present invention, such as Figure 1 As shown, the method includes:

[0058] S101, obtaining the current vehicle operating condition of the vehicle;

[0059] In the embodiment of the present invention, the current vehicle operating condition of the vehicle can be obtained by using a sensor provided by the vehicle body, or by using a separate sensor, and the present invention does not impose any specific limitation thereto.

[0060] S102, matching the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle;

[0061] The current vehicle operating condition may at least include vehicle operating conditions related to air-conditioning system control. For example, the vehicle's driving speed and external temperature are both vehicle operating conditions related to air-conditioning system control. The vehicle's driving speed and external temperature may be obtained as the current vehicle operating condition.

[0062] 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.

[0063] For example, the method of matching the current vehicle operating condition with a plurality of preset vehicle operating conditions includes matching the current vehicle's driving speed and ambient temperature with the driving speed and ambient temperature in each preset vehicle operating condition one by one.

[0064] S103, when the current vehicle operating condition matches a target preset vehicle operating condition among the plurality of preset vehicle operating conditions, determining a current actual heat exchange amount of the vehicle;

[0065] In an embodiment of the present invention, when the current vehicle speed and ambient temperature of the vehicle match the vehicle speed and ambient temperature of the preset vehicle operating condition one by one, it is considered that the current vehicle operating condition matches the target preset vehicle operating condition. For example, after obtaining the current vehicle speed of 40kph and the ambient temperature of 40°C through the sensor, this operating condition is compared one by one with the stored preset vehicle operating condition. When the same driving speed of 40kph and ambient temperature of 40°C are matched in the stored preset vehicle operating condition, it is considered that the current vehicle driving operating condition matches the preset vehicle operating condition in the preset vehicle operating condition.

[0066] In the embodiment of the present invention, the actual heat exchange amount of the vehicle needs to be determined by calculation based on the parameters of the condenser.

[0067] S104, when the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, controlling a target component of the air conditioner to be converted from a current state to an expected state corresponding to the target preset vehicle operating condition.

[0068] 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. The purpose of controlling the state of the target component of the air conditioner is to enable the heat dissipation of the air conditioning system to reach the expected heat exchange amount. Therefore, the controlled target component of the air conditioner is a component related to the heat dissipation of the air conditioning system. For example, the target component of the air conditioner may be only a cooling fan or only an intelligent air intake grille, or may include both a cooling fan and an intelligent air intake grille. The present invention does not make any specific limitations.

[0069] In the embodiment of the present invention, the purpose of determining the size of the actual heat exchange and the expected heat exchange is to determine whether the current condenser heat dissipation can reach the heat dissipation required by the air-conditioning system. If the actual heat exchange is less than the expected heat exchange, it means 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 stops working. Therefore, it is necessary to convert the state of the air-conditioning component from the current state to the expected state. If the actual heat exchange is greater than or equal to the expected heat exchange, it means that the current heat dissipation can meet the heat dissipation required by the air-conditioning system after the external conditions change, and the air-conditioning components are still adjusted according to the pressure of the air-conditioning compressor.

[0070] Figure 2 is a control flow diagram of an air conditioning control method according to Embodiment 1 of the present invention. Figure 2 As shown, Figure 2 The vehicle speed and environmental conditions (light intensity, ambient temperature and humidity) are vehicle operating conditions obtained in real time during actual driving. The air conditioning thermal management calibration condition is the expected heat dissipation of the air conditioning under the vehicle operating condition. The electronic fan is the cooling fan, and the smart grille is the smart air intake grille. The specific process includes the following:

[0071] First, the actual 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 speed and environmental conditions of the vehicle, matching is performed according to the preset speed and environmental conditions of the vehicle.

[0072] Next, the corresponding air conditioning thermal management calibration condition is determined; based on the preset vehicle condition, that is, the preset vehicle speed and environmental conditions, matching the actual vehicle condition, that is, the actual vehicle speed and environmental conditions.

[0073] After that, the electronic fan duty cycle, air conditioning mode and smart grille opening are adjusted according to the calibrated working conditions of air conditioning thermal management. When the preset vehicle working conditions that match the actual vehicle working conditions are determined, the expected heat exchange corresponding to the preset vehicle working conditions can be determined, and the expected state of the air conditioning components can be confirmed based on the expected heat exchange. Then, based on the expected heat exchange, the electronic fan is adjusted to the corresponding duty cycle, the air conditioning mode is adjusted to the corresponding mode, and the smart grille is adjusted to the corresponding opening.

[0074] Figure 3is another control flow diagram of the air conditioning control method according to the first embodiment of the present invention, such as Figure 3 As shown, Figure 3 The vehicle speed, light intensity, ambient temperature and humidity are the vehicle operating conditions obtained in real time during actual driving. The air conditioning thermal management calibration condition includes the expected heat exchange of the air conditioning under the vehicle operating condition, and the corresponding expected electronic fan duty cycle, expected smart grille opening and expected air conditioning mode. The electronic fan is a cooling fan, and the relay is a relay component for the operating condition signal. When it is determined that the actual heat exchange is less than the expected heat exchange of the preset vehicle operating condition, the air conditioning thermal management calibration condition, that is, the expected duty cycle of the electronic fan, the expected opening of the smart grille and the expected mode of the air conditioning are sent to the controller corresponding to the target component through the relay; the controller is used to control the corresponding air conditioning component, controller 1 is used to control the duty cycle of the electronic fan, controller 2 is used to control the mode of the air conditioning, and controller 3 is used to control the opening of the smart grille. The specific process includes:

[0075] First, the current vehicle speed, light intensity, and ambient temperature and humidity are determined and matched with preset vehicle speed, light intensity, and ambient temperature and humidity pre-set in the vehicle.

[0076] Next, after matching the preset vehicle speed, light intensity, ambient temperature and humidity, determine whether the actual heat exchange in the actual thermal management condition is less than the expected heat exchange in the pre-calibrated thermal management condition. If the actual heat exchange is not less than the expected heat exchange, it is still adjusted through the air-conditioning compressor pressure. The cooling fan duty cycle, smart grille opening and air-conditioning mode corresponding to the air-conditioning compressor pressure range are pre-determined. In the actual process, when the air-conditioning compressor reaches this range, the cooling fan is adjusted to the corresponding duty cycle, the smart grille is adjusted to the corresponding opening, and the air-conditioning is adjusted to the corresponding mode.

[0077] If the actual heat exchange amount is less than the expected heat exchange amount, the expected cooling fan duty cycle, expected smart grille opening and expected air-conditioning mode corresponding to the preset vehicle operating condition are sent to the repeater, and the repeater sends the control signal to the controllers of the cooling fan, smart grille and air-conditioning accordingly. The controller controls the corresponding cooling fan, smart grille and air-conditioning to adjust to the expected cooling fan duty cycle, expected smart grille opening and expected air-conditioning mode.

[0078] In an embodiment of the present invention, the actual heat exchange amount of the vehicle is determined by matching the current vehicle operating condition with the preset vehicle operating condition, and when the current vehicle operating condition matches the preset vehicle operating condition, the state of the air-conditioning component is directly converted by determining whether the actual heat exchange amount meets the required heat exchange amount, thereby advancing the adjustment time of the air-conditioning component to when the vehicle operating condition changes, so that the air-conditioning system can be adjusted to the expected heat exchange amount in advance and dissipate heat in time, avoiding the problem of insufficient heat dissipation causing the system temperature to rise, causing the air-conditioning compressor to stop working and the air-conditioning to be cut off, thereby improving the comfort of the passenger compartment.

[0079] Reference Figure 4 As shown, Figure 4 is a flow chart of an air conditioning control method provided by another embodiment of the present invention, such as Figure 4 As shown, the method includes:

[0080] S401, obtaining the current vehicle operating condition of the vehicle;

[0081] In an embodiment of the present invention, the current vehicle operating condition of the vehicle includes the current driving speed of the vehicle, the light intensity at the current position, and the ambient temperature and humidity.

[0082] S402, determining the difference between the current driving speed, light intensity, ambient temperature and humidity of the current vehicle operating condition and the driving speed, light intensity, ambient temperature and humidity of the preset vehicle operating condition;

[0083] In the embodiment of the present invention, since the influence of the change of the vehicle working condition on the heat dissipation of the air conditioner has a range, that is, when the air conditioner heat dissipation changes within the range, the heat dissipation of the air conditioner is the same. Therefore, after calibrating the determined value of the preset vehicle working condition, the certain values ​​within the left and right ranges are regarded as the calibrated preset vehicle working condition. Therefore, in the actual vehicle driving process, it is necessary to determine the difference between the current vehicle working condition and the preset vehicle working condition. The specific difference range is determined according to the heat dissipation of the vehicle, and the present invention does not make specific restrictions. For example, the current vehicle working condition is a vehicle driving speed of 42kph and a light intensity of 1000W / m 2 , ambient temperature 40℃, relative humidity 50%, match it with the preset multiple vehicle operating conditions, determine the vehicle speed 40kph, light intensity 1000W / m in the preset vehicle operating conditions 2 , ambient temperature 40°C, relative humidity 50%, then the difference is determined to be 2kph.

[0084] S403, based on the difference, determining whether the current vehicle operating condition matches the preset vehicle operating condition;

[0085] 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 they can be matched. If it is larger than the set difference, it indicates that the difference between the two is large and they cannot be matched.

[0086] The specific setting difference is set by the heat dissipation condition of the vehicle air conditioner. It can be set by setting the difference in a single condition of driving speed, light intensity, ambient temperature and humidity, that is, only setting the speed difference, light intensity difference, etc. to limit it. It can also be set by setting multiple differences in driving speed, light intensity, ambient temperature and humidity, such as limiting by the difference between speed and light intensity, and the difference between speed and ambient temperature.

[0087] For example, the current vehicle operating conditions are a vehicle speed of 42 kph and a light intensity of 1000 W / m 2 , ambient temperature 40℃, relative humidity 50%, match it with the preset multiple vehicle operating conditions, determine the vehicle speed 40kph, light intensity 1000W / m in the preset vehicle operating conditions 2 , the difference between the ambient temperature of 40°C and the relative humidity of 50% and the current vehicle operating condition is the vehicle speed of 2kph, which is less than the set difference of 5kph, then it is determined that the current vehicle operating condition matches one of the multiple preset vehicle operating conditions.

[0088] S404, when the current vehicle operating condition matches the target preset vehicle operating condition, detecting the current inlet air temperature, outlet air temperature and front wind speed of the condenser;

[0089] The inlet air temperature of the condenser indicates the temperature of the wind 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 outlet air temperature of the condenser indicates the temperature of the air outlet from the condenser, which is generally the temperature of the air after heat exchange through the condenser. The wind speed in front of the condenser indicates the speed at which the wind blows in front of the condenser. The wind blowing through the condenser takes away part of the heat of the coolant in the condenser, thereby reducing the temperature of the coolant in the condenser. Therefore, the detected inlet and outlet air temperatures and wind speeds of the condenser can obtain the heat exchange capacity of the condenser.

[0090] In an embodiment of the present invention, the current inlet air temperature, outlet air temperature and front wind speed of the condenser can be obtained by a sensor provided by the vehicle, or by resetting the sensor for acquisition, and the present invention does not impose any specific limitation thereto.

[0091] S405, determining the current actual heat exchange amount of the vehicle according to the inlet and outlet air temperatures and the front wind speed;

[0092] In the embodiment of the present invention, the actual heat exchange amount of the vehicle is determined according to the current inlet and outlet air temperatures and the front wind speed of the vehicle condenser. The heat exchange amount Q is calculated according to the following calculation formula (1) by actually obtaining the inlet and outlet air temperatures and the front wind speed of the vehicle condenser:

[0093] Q=C×V×S×(T 2 -T 1 ) (1)

[0094] Where C is the specific heat capacity of air, V is the wind speed before the condenser, S is the heat exchange area of ​​the condenser, T 2 is the condenser outlet air temperature, T 1 is the condenser inlet air temperature.

[0095] In the embodiment of the present invention, if the current vehicle operating condition does not match the multiple preset vehicle operating conditions, it indicates that the vehicle air conditioner is not in full load operation at this time. In this case, the adjustment is made according to the pressure of the air conditioner compressor. The specific adjustment method is: calculate the cooling fan duty cycle and the smart air intake grille opening corresponding to the multiple preset air conditioner compressor pressure ranges, and when it is detected that the air conditioner compressor pressure is within the preset range, adjust the cooling fan duty cycle to the duty cycle corresponding to the pressure range, and adjust the smart air intake grille opening to the opening corresponding to the pressure range.

[0096] S406, when the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, controlling the target component of the air conditioner to be converted from a current state to an expected state corresponding to the target preset vehicle operating condition.

[0097] In the embodiment of the present invention, when the actual heat exchange is less than the expected heat exchange corresponding to the target preset vehicle operating condition, the air conditioning mode can 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 is increased to meet the heat dissipation requirements of the air conditioning system, while controlling the air conditioning mode conversion can reduce the heat dissipation requirements of the air conditioning system, so that the heat dissipation of the vehicle reaches the required heat dissipation from two aspects, thereby avoiding the air conditioning from being cut off.

[0098] In some examples, the actual heat exchange amount 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 before the condenser and the expected heat exchange amount Q corresponding to the target preset vehicle operating condition, 0 Calculate the temperature difference between the inlet and outlet air of the condenser. The specific calculation formula (2) is as follows:

[0099] ΔT=Q 0 / (C×V×S) (2)

[0100] Among them, ΔT is the preset temperature difference, C is the specific heat capacity of air, V is the obtained wind speed before the condenser, and S is the heat exchange area of ​​the condenser.

[0101] When the actual condenser inlet and outlet temperature difference is less than the expected temperature difference, it is considered that the actual heat exchange is less than the expected heat exchange corresponding to the target preset vehicle operating condition. For example, when the ambient temperature is 40°C and the light intensity is 1050W / m 2, when the vehicle speed is 40kph, it is determined that the current operating condition of the vehicle matches the preset operating condition. According to the preset operating condition, the corresponding preset heat exchange capacity is determined to be 5.9KW. The wind speed before the condenser is detected to be 2m / s, the condenser inlet air temperature is 42.2℃, and the outlet air temperature is 45.2℃. The corresponding preset temperature difference is calculated to be 10℃. According to the detection, the actual temperature difference of the condenser is 3℃. The calculation shows that the actual temperature difference of the condenser is less than the preset temperature difference. It is determined that the current actual heat exchange capacity of the vehicle is less than the expected heat exchange capacity under the corresponding operating condition, and then the cooling fan duty cycle is controlled to 65%, and the opening of the intelligent air intake grille is controlled to 100%.

[0102] In the embodiment of the present invention, the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition, which indicates that the actual heat exchange amount cannot reach the required heat exchange amount of this vehicle operating condition. At this time, if the heat exchange amount is not increased in time, the temperature of the air-conditioning system will increase, causing the air-conditioning compressor to stop working and the air-conditioning to stop absorbing air.

[0103] In an embodiment of the present invention, if the actual heat exchange amount is greater than or equal to the expected heat exchange amount 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, and at this time, it is adjusted by the air-conditioning compressor pressure.

[0104] The following is a detailed description of the method for determining the preset vehicle operating conditions, the expected heat exchange amount, and the expected state of the air conditioning component in the embodiment of the present invention:

[0105] In the embodiment of the present invention, Figure 5 As shown, Figure 5 A method for determining a preset vehicle operating condition of an air conditioner and an expected heat exchange amount and an expected state of an air conditioner target component in another embodiment of the present invention is shown, comprising:

[0106] S501, simulating a plurality of different operating conditions when the air conditioner is running at full load to obtain the plurality of preset vehicle operating conditions;

[0107] In an embodiment of the present invention, during the vehicle design stage, a whole vehicle simulation model is used to simulate various different operating conditions when the air conditioner is running at full load. The various operating conditions include vehicle operating conditions such as vehicle speed, light intensity, ambient temperature and humidity that have an impact on the heat dissipation of the condenser.

[0108] In the embodiment of the present invention, the full load operation of the air conditioner includes a state where the air conditioner operates at a maximum cooling effect or a maximum heating effect, or may be a state where the air conditioner operates at a maximum power, and the present invention does not make any specific limitation thereto;

[0109] S502, determining an expected inlet air temperature, an expected outlet air temperature, and an expected wind speed before the condenser of the vehicle under each of the preset vehicle operating conditions;

[0110] In an 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, expected outlet air temperature and expected wind speed before the condenser of the vehicle condenser under each preset vehicle operating condition.

[0111] S503, determining the expected heat exchange amount corresponding to each of the preset vehicle operating conditions according to the expected inlet air temperature, the expected outlet air temperature, and the expected wind speed before the condenser;

[0112] In an embodiment of the present invention, the expected condenser inlet temperature, expected outlet temperature and expected wind speed in front of the condenser obtained in step S502, combined with the heat exchange area of ​​the condenser, can obtain the expected heat exchange amount under the vehicle operating condition. The expected heat exchange amount for each preset vehicle operating condition is calculated and matched, and a heat dissipation table corresponding to each vehicle operating condition and heat dissipation can be formed.

[0113] S504: Determine the expected state corresponding to the target component under each of the preset vehicle operating conditions according to the expected heat exchange amount.

[0114] In an embodiment of the present invention, the corresponding state of the air conditioner target component is determined by the expected heat exchange amount, and the obtained state of the air conditioner target component is matched with the vehicle operating condition to obtain a comparison table of preset vehicle operating conditions and the expected state of the target component, as shown in Table 1 and Table 2 below, which respectively represent a comparison table of multiple preset vehicle operating conditions and fan duty cycle and a comparison table of multiple preset vehicle operating conditions and smart grille opening. In an embodiment of the present invention, the expected mode corresponding to the air conditioner can also be determined by the expected heat exchange amount, and similarly, multiple preset vehicle operating conditions and the expected modes of the air conditioner are stored in correspondence.

[0115] Table 1 Comparison table of various preset vehicle operating conditions and fan duty cycle

[0116]

[0117] Table 2 Comparison table of various preset vehicle operating conditions and intelligent grille opening

[0118]

[0119]

[0120] In the embodiment of the present invention, the current vehicle operating condition is matched with the preset vehicle operating condition, and when the current vehicle operating condition matches the preset vehicle operating condition, the actual heat exchange amount or actual temperature difference of the vehicle is determined, and the state of the air-conditioning component is directly converted by determining whether the actual heat exchange amount or actual temperature difference of the vehicle meets the demand. At the same time, since the vehicle operating condition under the full-load operation state of the air-conditioning is pre-set, and the expected heat exchange amount and the expected state of the air-conditioning component under each vehicle operating condition are determined, the state of the air-conditioning component can be directly controlled by judging the operating conditions when the vehicle air-conditioning is fully loaded during the actual vehicle driving process, and the adjustment time of the air-conditioning component is advanced to the time when the operating condition changes, so that the air-conditioning system can be adjusted to the required heat dissipation in advance and dissipate heat in time, avoiding the problem of insufficient heat dissipation causing the system temperature to rise, causing the air-conditioning compressor to stop working and the air-conditioning to stop suction, thereby improving the comfort of the passenger compartment.

[0121] Embodiment 2

[0122] Figure 6 is a structural schematic diagram of an air conditioning control device provided in Embodiment 2 of the present invention, such as Figure 6 As shown, the air conditioning control device includes:

[0123] An acquisition module 601 is used to acquire the current vehicle operating condition of the vehicle;

[0124] A matching module 602, configured to match the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle;

[0125] A determination module 603 is used to determine the current actual heat exchange amount of the vehicle when matching the target preset vehicle operating condition among the plurality of preset vehicle operating conditions;

[0126] The control module 604 is used to control the target components of the air conditioner to switch from the current state to the expected state corresponding to the target preset vehicle operating condition when the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition; the target components of the air conditioner include a cooling fan and / or an intelligent air intake grille.

[0127] Optionally, the air conditioning control device further includes:

[0128] The control submodule is used to control the air conditioning mode to be converted from the current mode to the expected mode corresponding to the target preset vehicle operating condition when the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition.

[0129] Optionally, the air conditioning control device further includes:

[0130] A second acquisition module, configured to acquire the pressure of the air-conditioning compressor of the vehicle when the current operating condition of the vehicle does not match the plurality of preset vehicle operating conditions;

[0131] The second control module is used to control the target component to be converted from a current state to a corresponding state according to the pressure of the air-conditioning compressor.

[0132] Optionally, the determining module 603 further includes:

[0133] A detection module, used to detect the current inlet air temperature, outlet air temperature and front wind speed of the vehicle condenser;

[0134] The determination submodule is used to determine the current actual heat exchange amount of the vehicle according to the inlet air temperature, the outlet air temperature and the front wind speed.

[0135] Optionally, the air conditioning control device further includes:

[0136] A storage module is used 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.

[0137] Optionally, the matching module 602 further includes:

[0138] A second determination module is used to determine the difference between the current driving speed, light intensity, ambient temperature and humidity of the current vehicle operating condition and the driving speed, light intensity, ambient temperature and humidity of the preset vehicle operating condition;

[0139] A matching submodule is used to determine whether the current vehicle operating condition matches the preset vehicle operating condition based on the difference.

[0140] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0141] For the method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the order of the actions described, because according to the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and components involved are not necessarily required by the present invention.

[0142] The above is a detailed introduction to an air conditioning control method, device and vehicle provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An air conditioning control method, characterized in that: The method comprises: Get the current vehicle operating condition of the vehicle; Matching the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle, wherein the plurality of preset vehicle operating conditions are a plurality of different operating conditions when the air conditioner is running at full load; When a target preset vehicle operating condition among the plurality of preset vehicle operating conditions is matched, determining a 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, the target component of the air conditioner is controlled to be converted from a current state to an 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 grille.

2. The air conditioning control method according to claim 1, characterized in that: The target component for controlling the air conditioner is converted from a current state to an expected state corresponding to the target preset vehicle operating condition, including: The cooling fan is controlled to update the current duty cycle to the expected duty cycle corresponding to the target preset vehicle operating condition, and / or the smart air intake grille is controlled to update the current opening to the expected opening corresponding to the target preset vehicle operating 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, the air conditioning mode is controlled to be converted 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, characterized in that: The method further comprises: When the current operating conditions of the vehicle do not match the plurality of preset vehicle operating conditions, obtaining the pressure of the air-conditioning compressor of the vehicle; According to the pressure of the air-conditioning compressor, the target component is controlled to be converted from a current state to a corresponding state.

5. The air conditioning control method according to claim 1, characterized in that: Determining the actual current heat exchange amount of the vehicle includes: Detecting the current inlet air temperature, outlet air temperature and front wind speed of the vehicle condenser; The actual heat exchange amount of the vehicle is determined according to the inlet air temperature, the outlet air temperature and the front wind speed.

6. The air conditioning control method according to claim 1, characterized in that: The method further comprises: Simulating a plurality of different operating conditions when the air conditioner is running at full load to obtain the plurality of preset vehicle operating conditions; Determine the expected inlet air temperature, the expected outlet air temperature and the expected wind speed before the condenser of the vehicle under each of the preset vehicle operating conditions; Determining the expected heat exchange amount corresponding to each of the preset vehicle operating conditions according to the expected inlet air temperature, the expected outlet air temperature, and the expected wind speed before the condenser; The expected state corresponding to the target component under each of the preset vehicle operating conditions is determined according to the expected heat exchange amount.

7. The air conditioning control method according to claim 1, characterized in that: The matching of the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle includes: The current driving speed, light intensity, ambient temperature and humidity of the vehicle are matched with the driving speed, light intensity, ambient temperature and humidity of each preset vehicle operating condition.

8. The air conditioning control method according to claim 7, characterized in that: 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 preset vehicle operating condition 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 operating condition and the driving speed, light intensity, ambient temperature and humidity of the preset vehicle operating condition; Based on the difference, it is determined whether the current vehicle operating condition matches the preset vehicle operating condition.

9. An air conditioning control device, characterized in that: The device comprises: An acquisition module, used to acquire the current vehicle operating condition of the vehicle; A matching module, used for matching the current vehicle operating condition with a plurality of preset vehicle operating conditions of the vehicle, wherein the plurality of preset vehicle operating conditions are a plurality of different operating conditions when the air conditioner is running at full load; A determination module, configured to determine a current actual heat exchange amount of the vehicle when a target preset vehicle operating condition among the plurality of preset vehicle operating conditions is matched; A control module is used to control the target components of the air conditioner to switch from a current state to an expected state corresponding to the target preset vehicle operating condition when the actual heat exchange amount is less than the expected heat exchange amount corresponding to the target preset vehicle operating condition; the target components of the air conditioner include a cooling fan and / or an intelligent air intake grille.

10. A vehicle, characterized in that: include: A vehicle control unit, wherein the vehicle control unit is used to execute the air conditioning control method described in any one of claims 1 to 8.

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