Vehicle defogging methods, devices, vehicles, and storage media

Abstract

The application relates to a defogging method and device of a vehicle, the vehicle and a storage medium, wherein the method comprises the following steps: detecting whether the vehicle meets a preset defogging condition; in the case that it is detected that the vehicle meets the preset defogging condition, calculating a fogging risk level of the vehicle according to an in-vehicle environment parameter, a vehicle state parameter and an out-of-vehicle environment parameter of the vehicle; in the case that the fogging risk level is greater than a preset fogging level, matching a corresponding defogging strategy according to the out-of-vehicle environment parameter and the vehicle state parameter of the vehicle, and determining a first target temperature and a circulating working condition of an evaporator based on the defogging strategy, so as to drive the evaporator to defog in the first target temperature and the circulating working condition. Therefore, the technical problem that, in the prior art, the temperature value of the evaporator is fixed, energy is not saved, and the air volume and the air direction that a user intuitively feels are changed in the defogging process, thereby affecting the use experience of the user when the air conditioning equipment is normally used, is solved.

Description

Technical Field

[0001] This application relates to the field of vehicle air conditioning design technology, and in particular to a vehicle defogging method, device, vehicle, and storage medium. Background Technology

[0002] In related technologies, in the automatic defogging control method for spring and autumn, a humidity sensor can be configured to calculate whether there is a risk of fogging in the vehicle by collecting humidity data from the sensor. After determining that there is a risk of fogging, the system controls the fixed evaporator temperature value, adjusts the air volume and air outlet mode to perform defogging.

[0003] However, in related technologies, the evaporator temperature is fixed, which is not energy-efficient and changes the airflow and direction perceived by the user during the demisting process, thus affecting the user experience when using the air conditioning equipment normally. This needs to be improved. Summary of the Invention

[0004] This application provides a method, apparatus, vehicle, and storage medium for defogging a vehicle, in order to solve the technical problem in the related art where the evaporator temperature is fixed, which is not energy-efficient and changes the air volume and direction perceived by the user during the defogging process, thereby affecting the user's experience when using the air conditioning equipment normally.

[0005] The first aspect of this application provides a vehicle defogging method, comprising the following steps: detecting whether the vehicle meets preset defogging conditions; if the vehicle meets the preset defogging conditions, calculating the vehicle's fogging risk level based on the vehicle's interior environmental parameters, vehicle status parameters, and exterior environmental parameters; if the fogging risk level is greater than a preset fogging level, matching a corresponding defogging strategy based on the vehicle's exterior environmental parameters and vehicle status parameters, and determining a first target temperature and cycle condition of the evaporator based on the defogging strategy, so as to drive the evaporator to perform defogging according to the first target temperature and cycle condition.

[0006] Optionally, in one embodiment of this application, the in-vehicle environmental parameters include at least one of glass temperature and in-vehicle humidity; the vehicle status parameters include at least one of vehicle speed, number of occupants, and blower airflow; and the external environmental parameters include at least one of dew point temperature, ambient temperature, and rainfall.

[0007] Optionally, in one embodiment of this application, detecting whether the vehicle meets the preset defogging conditions includes: determining whether the ambient temperature is greater than a first preset temperature threshold, wherein the first preset temperature threshold is obtained from the lowest ambient temperature when the vehicle uses the evaporator temperature for in-vehicle dehumidification; if the ambient temperature is greater than the first preset temperature threshold, then it is determined that the vehicle meets the preset defogging conditions.

[0008] Optionally, in one embodiment of this application, the step of matching a corresponding defogging strategy based on the vehicle's external environmental parameters and vehicle state parameters, and determining the first target temperature and cycle condition of the evaporator based on the defogging strategy, includes: obtaining a first evaporator temperature reference value based on the ambient temperature and a preset temperature difference; determining whether the first evaporator temperature reference value is greater than a preset upper limit value for the evaporator temperature; determining whether the airflow level corresponding to the blower airflow is greater than a preset level threshold based on the blower airflow; if the first evaporator temperature reference value is greater than the preset upper limit value for the evaporator temperature and the airflow level is greater than the preset level threshold, determining that the first target temperature in the defogging strategy is obtained by the minimum value between the preset upper limit value for the evaporator temperature and the second target temperature under non-defogging conditions; if the first evaporator temperature reference value is greater than the preset upper limit value for the evaporator temperature and the airflow level is greater than the preset level threshold, determining that the first target temperature in the defogging strategy is obtained by the minimum value between the preset upper limit value for the evaporator temperature and the second target temperature under non-defogging conditions; if the first evaporator temperature reference value is greater than the preset upper limit value for the evaporator temperature and the second target temperature under non-defogging conditions ... greater than the preset upper limit value for the evaporator temperature and the second target temperature under non-defogging conditions, determining that the first target temperature in the defogging strategy is greater than the preset upper limit value for the evaporator temperature and the second target temperature under non-defogging conditions; if the first target temperature reference value is greater than the preset If an upper limit for evaporator temperature is set, and the airflow level is less than or equal to the preset level threshold, a second evaporator temperature reference value is obtained based on the preset upper limit for evaporator temperature and the first evaporator temperature reference value. The first target temperature in the demisting strategy is determined to be the minimum value between the second evaporator temperature reference value and the second target temperature. If the first evaporator temperature reference value is less than or equal to the preset upper limit for evaporator temperature, and the airflow level is greater than the preset level threshold, the first target temperature in the demisting strategy is determined to be the first evaporator reference value. If the first evaporator temperature reference value is less than or equal to the preset upper limit for evaporator temperature, and the airflow level is less than or equal to the preset level threshold, the first target temperature in the demisting strategy is determined to be the preset lower limit for evaporator temperature.

[0009] Optionally, in one embodiment of this application, the step of matching a corresponding defogging strategy based on the vehicle's external environmental parameters and vehicle state parameters, and determining the first target temperature and circulation condition of the evaporator based on the defogging strategy, includes: when the ambient rainfall level corresponding to the rainfall is a preset heavy rain level or a preset torrential rain level, determining that the defogging strategy is to control the vehicle to perform full internal circulation control on the internal and external circulation dampers; when the ambient rainfall level is a preset light rain level or a preset moderate rain level, determining whether the ambient temperature is greater than a second preset temperature threshold based on the external environmental parameters; if the ambient temperature is greater than the second preset temperature threshold, determining that the defogging strategy is to control the vehicle to perform full internal circulation control on the internal and external circulation dampers, otherwise controlling the vehicle to perform full external circulation control on the internal and external circulation dampers.

[0010] A second aspect of this application provides a vehicle defogging device, comprising: a detection module for detecting whether the vehicle meets preset defogging conditions; a calculation module for calculating the vehicle's fogging risk level based on in-vehicle environmental parameters, vehicle state parameters, and external environmental parameters when the vehicle meets the preset defogging conditions; and a defogging module for matching a corresponding defogging strategy based on the vehicle's external environmental parameters and vehicle state parameters when the fogging risk level is greater than a preset fogging level, and determining a first target temperature and cycle condition of the evaporator based on the defogging strategy, so as to drive the evaporator to perform defogging according to the first target temperature and cycle condition.

[0011] Optionally, in one embodiment of this application, the in-vehicle environmental parameters include at least one of glass temperature and in-vehicle humidity; the vehicle status parameters include at least one of vehicle speed, number of occupants, and blower airflow; and the external environmental parameters include at least one of dew point temperature, ambient temperature, and rainfall.

[0012] Optionally, in one embodiment of this application, the detection module includes: a first judgment unit, configured to judge whether the ambient temperature is greater than a first preset temperature threshold, wherein the first preset temperature threshold is obtained from the lowest ambient temperature when the vehicle uses the evaporator temperature for in-vehicle dehumidification; and a first determination unit, configured to determine that the vehicle meets the preset defogging conditions when the ambient temperature is greater than the first preset temperature threshold.

[0013] Optionally, in one embodiment of this application, the defogging module includes: a second judgment unit, configured to obtain a first evaporator temperature reference value based on the ambient temperature and a preset temperature difference, and determine whether the first evaporator temperature reference value is greater than a preset upper limit value for the evaporator temperature; a third judgment unit, configured to determine whether the airflow level corresponding to the blower airflow is greater than a preset level threshold value based on the blower airflow; a second determination unit, configured to determine that the first target temperature in the defogging strategy is obtained from the minimum value between the preset upper limit value for the evaporator temperature and the second target temperature under non-defogging conditions when the first evaporator temperature reference value is greater than the preset upper limit value for the evaporator temperature and the airflow level is greater than the preset level threshold value; and a third determination unit, configured to determine whether the first target temperature in the defogging strategy is obtained from the minimum value between the preset upper limit value for the evaporator temperature and the second target temperature under non-defogging conditions when the first target temperature reference value is greater than the preset upper limit value for the evaporator temperature and the airflow level is greater than the preset level threshold value. When the first evaporator temperature reference value is less than or equal to the preset level threshold, and the airflow level is greater than the preset level threshold, the first target temperature in the demisting strategy is determined to be the first evaporator reference value. A fourth determining unit is configured to determine the first target temperature in the demisting strategy as the first evaporator reference value when the first evaporator temperature reference value is less than or equal to the preset evaporator temperature upper limit and the airflow level is greater than the preset level threshold. A fifth determining unit is configured to determine the first target temperature in the demisting strategy as the preset evaporator temperature lower limit when the first evaporator temperature reference value is less than or equal to the preset evaporator temperature upper limit and the airflow level is less than or equal to the preset level threshold.

[0014] Optionally, in one embodiment of this application, the defogging module includes: a sixth determining unit, configured to determine, when the ambient rainfall level corresponding to the rainfall is a preset heavy rain level or a preset torrential rain level, that the defogging strategy is to control the vehicle to perform full internal circulation control on the internal and external circulation dampers; a fourth judging unit, configured to, when the ambient rainfall level is a preset light rain level or a preset moderate rain level, determine, based on the external environmental parameters, whether the ambient temperature is greater than a second preset temperature threshold; and a seventh determining unit, configured to, when the ambient temperature is greater than the second preset temperature threshold, determine that the defogging strategy is to control the vehicle to perform full internal circulation control on the internal and external circulation dampers, otherwise control the vehicle to perform full external circulation control on the internal and external circulation dampers.

[0015] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle defogging method as described in the above embodiments.

[0016] A fourth aspect of this application provides a computer-readable storage medium storing computer instructions for causing the computer to perform the vehicle defogging method as described in the above embodiments.

[0017] A fifth aspect of this application provides a computer program product, including a computer program, which, when executed, is used to implement the vehicle defogging method described above.

[0018] This application embodiment can calculate the vehicle's fogging risk level based on in-vehicle environmental parameters, vehicle status parameters, and external environmental parameters when the vehicle meets preset defogging conditions. If the fogging risk level is higher than the preset fogging level, a corresponding defogging strategy is matched based on the vehicle's external environmental parameters and vehicle status parameters. Based on the defogging strategy, a first target temperature and circulation condition for the evaporator are determined, and the evaporator is driven to perform defogging according to the first target temperature and circulation condition. This achieves automatic defogging and energy saving without changing the airflow and direction. Therefore, it solves the technical problem in related technologies where the evaporator temperature is fixed, which is neither energy-efficient nor does it change the user's perceived airflow and direction during defogging, thus affecting the user's experience when using the air conditioning equipment.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 This is a flowchart of a vehicle defogging method according to an embodiment of this application;

[0022] Figure 2 This is a schematic diagram illustrating the principle of a vehicle defogging method according to an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the structure of a vehicle defogging device according to an embodiment of this application;

[0024] Figure 4 This is a structural schematic diagram of a vehicle provided according to an embodiment of this application. Detailed Implementation

[0025] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0026] The following description, with reference to the accompanying drawings, describes a vehicle defogging method, apparatus, vehicle, and storage medium according to embodiments of this application. Addressing the technical problems mentioned in the background art, where the evaporator temperature is fixed, resulting in energy waste and altering the perceived airflow and direction during defogging, thus affecting the user experience when using air conditioning, this application provides a vehicle defogging method. In this method, when the vehicle meets preset defogging conditions, the vehicle's fogging risk level is calculated based on in-vehicle environmental parameters, vehicle status parameters, and external environmental parameters. If the fogging risk level exceeds the preset fogging level, a corresponding defogging strategy is matched based on the vehicle's external environmental parameters and vehicle status parameters. A first target temperature and circulation condition for the evaporator are determined based on the defogging strategy, and the evaporator is driven to perform defogging according to the first target temperature and circulation condition. This achieves automatic defogging without changing the airflow and direction, while simultaneously achieving energy savings. This solves the technical problem in related technologies where the evaporator temperature is fixed, which is not energy-efficient and changes the airflow and direction perceived by the user during the demisting process, thus affecting the user's experience when using the air conditioning equipment.

[0027] Specifically, Figure 1 This is a schematic flowchart of a vehicle defogging method provided in an embodiment of this application.

[0028] like Figure 1 As shown, the vehicle's defogging method includes the following steps:

[0029] In step S101, it is detected whether the vehicle meets the preset defogging conditions.

[0030] It is understandable that if there is a significant temperature difference between the inside and outside of the vehicle while it is in motion, the vehicle's windows may fog up, thus affecting the user's visibility.

[0031] To ensure clear visibility for users and reduce the risk of accidents, this application embodiment can perform automatic defogging through a scheme based on evaporator temperature and vehicle internal / external air circulation control. Based on this, this application embodiment can first determine whether the vehicle meets the conditions for activating the scheme involved in this application embodiment, i.e., preset defogging conditions.

[0032] Optionally, in one embodiment of this application, detecting whether the vehicle meets the preset defogging conditions includes: determining whether the ambient temperature is greater than a first preset temperature threshold, wherein the first preset temperature threshold is obtained from the lowest ambient temperature when the vehicle uses the evaporator temperature to dehumidify the vehicle interior; if the ambient temperature is greater than the first preset temperature threshold, then it is determined that the vehicle meets the preset defogging conditions.

[0033] In actual operation, the evaporator has a normal operating temperature range. Therefore, in this embodiment, the corresponding demisting scheme can only be implemented if the evaporator can achieve the demisting effect within the normal operating temperature range.

[0034] Based on this, the embodiments of this application can determine whether the ambient temperature is greater than a certain temperature value, which is the minimum ambient temperature for dehumidification inside the vehicle. The specific value can be set by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0035] In step S102, if the vehicle meets the preset defogging conditions, the vehicle's fogging risk level is calculated based on the vehicle's interior environmental parameters, vehicle status parameters, and exterior environmental parameters. The interior environmental parameters include at least one of glass temperature and interior humidity; the vehicle status parameters include at least one of vehicle speed, number of occupants, and blower airflow; and the exterior environmental parameters include at least one of dew point temperature, ambient temperature, and rainfall.

[0036] Understandably, dew point temperature (T) d The temperature at which water vapor in the air begins to condense into dew; the glass temperature (T) g The interior temperature (RH) is the actual temperature of the glass surface inside the vehicle; the interior humidity (RH) is the percentage of relative humidity inside the vehicle; the ambient temperature (T) is the actual temperature of the glass surface inside the vehicle. a The external temperature is represented by ( ); rainfall is the intensity of rainfall, which can be divided into levels such as no rain, light rain, moderate rain, and heavy rain; the number of occupants affects the increase in humidity and temperature inside the vehicle; and vehicle speed (V) is the speed at which the vehicle travels, affecting the exchange of air inside and outside the windshield and the temperature.

[0037] Based on the above parameters, the embodiments of this application can calculate the temperature difference (ΔT = T). g -T a If ΔT is positive and large enough, it means that the glass temperature is higher than the dew point temperature, and the possibility of fogging is low; otherwise, the risk of fogging increases.

[0038] This application embodiment can calculate based on the vehicle's interior humidity (RH); the higher the humidity, the higher the HF value. A non-linear function can be used to reflect the strong influence of humidity on fogging, for example...

[0039] The embodiments of this application can be adjusted according to the number of passengers, because human respiration and body heat increase the humidity inside the vehicle. This can be simplified to a linear or exponential function based on the number of passengers, such as OF = a * Passengers + b.

[0040] Rainy weather increases external humidity and may lower glass temperature; RF can set different coefficients based on rainfall levels.

[0041] Vehicle speed can affect the effectiveness of natural ventilation and reduce the risk of fogging. At low speeds, the drag coefficient (VF) is smaller, while at high speeds, VF is larger. This application's embodiments can assume a basic relationship between the drag coefficient and vehicle speed, such as VF = c·V 0.5 .

[0042] The embodiments of this application can take into account the above factors to construct a risk scoring model.

[0043] Risks:

[0044] FR=ω1·ΔT+ω2·HF+ω3·OF+ω4·RF+ω5·VF.

[0045] Among them, ω1-ω5 are the weights of each factor, which can be adjusted according to the actual situation.

[0046] Risk level classification: Based on the FR value, the risk of fogging is divided into several levels R, such as low risk, medium risk, high risk, and very high risk. The specific classification criteria can be determined based on practical experience and data analysis.

[0047] In step S103, when the fogging risk level is greater than the preset fogging level, a corresponding defogging strategy is matched according to the vehicle's external environmental parameters and vehicle status parameters, and the first target temperature and cycle conditions of the evaporator are determined based on the defogging strategy, so as to drive the evaporator to perform defogging according to the first target temperature and cycle conditions.

[0048] In actual implementation, the embodiments of this application can perform static and dynamic calibration to determine the corresponding fogging point R. h The fog initiation point and fog dissipation point R1 are calculated by the difference between adjacent temperature points.

[0049] When the fog risk level R > R h In cases where the fogging risk level is determined to be greater than the preset fogging level, a corresponding defogging strategy is matched based on the vehicle's external environmental parameters and vehicle status parameters. This achieves automatic defogging while simultaneously saving energy, without changing the airflow and direction.

[0050] In addition, after the vehicle implements the defogging strategy, if the fogging risk level R < R1, the automatic defogging control can be deactivated and the vehicle can return to normal control.

[0051] It should be noted that the fogging point and fogging point can be set by those skilled in the art according to the actual situation, and no specific restrictions are imposed here.

[0052] Optionally, in one embodiment of this application, a corresponding defogging strategy is matched based on the vehicle's external environmental parameters and vehicle state parameters, and a first target temperature and cycle condition of the evaporator are determined based on the defogging strategy, including: obtaining a first evaporator temperature reference value based on the ambient temperature and a preset temperature difference; determining whether the first evaporator temperature reference value is greater than a preset upper limit value for the evaporator temperature; determining whether the airflow level corresponding to the blower airflow is greater than a preset level threshold based on the blower airflow; if the first evaporator temperature reference value is greater than the preset upper limit value for the evaporator temperature and the airflow level is greater than the preset level threshold, determining that the first target temperature in the defogging strategy is obtained from the minimum value between the preset upper limit value for the evaporator temperature and the second target temperature under non-defogging conditions; and determining the first target temperature of the evaporator under the first evaporator temperature reference value and cycle condition based on the preset upper limit value for the evaporator temperature and the second target temperature under non-defogging conditions. If the reference value is greater than the preset upper limit of evaporator temperature and the airflow level is less than or equal to the preset level threshold, the second evaporator temperature reference value is obtained based on the preset upper limit of evaporator temperature and the first evaporator temperature reference value. The first target temperature in the demisting strategy is determined to be the minimum value between the second evaporator temperature reference value and the second target temperature. If the first evaporator temperature reference value is less than or equal to the preset upper limit of evaporator temperature and the airflow level is greater than the preset level threshold, the first target temperature in the demisting strategy is determined to be the first evaporator reference value. If the first evaporator temperature reference value is less than or equal to the preset upper limit of evaporator temperature and the airflow level is less than or equal to the preset level threshold, the first target temperature in the demisting strategy is determined to be the preset lower limit of evaporator temperature.

[0053] First, the embodiments of this application can determine multiple temperature reference values ​​during the evaporator temperature control process. These reference values ​​may include an evaporator lower temperature limit (the lower limit of the temperature range in which the evaporator operates normally), an evaporator upper temperature limit (the upper limit of the temperature range in which the evaporator operates normally), a second target temperature (the target evaporator temperature under non-demisting conditions), a preset temperature difference (a certain difference between the ambient temperature and the evaporator temperature), a first evaporator temperature reference value (ambient temperature minus the preset temperature difference), and a second evaporator temperature reference value (the evaporator temperature reference value when the evaporator is in a certain state, in which the evaporator efficiency reaches its maximum).

[0054] Based on this, embodiments of this application can determine whether the air volume level corresponding to the blower air volume is greater than a certain level threshold based on the blower air volume, and then determine the temperature regulation strategy of the evaporator.

[0055] For example, taking a blower with a total airflow level of 31 as an example, the airflow level Wind is defined. lvl ≤13 indicates low airflow; therefore, the airflow level Wind is defined. lvl >13 indicates high airflow; the target evaporator temperature under non-automatic demisting control is defined as the second target temperature.

[0056] The ambient temperature T is determined by an external temperature sensor. am -Is the preset temperature difference greater than the upper limit of the evaporator temperature?

[0057] If the temperature exceeds the upper limit of the evaporator, then determine the airflow level. If the airflow level is Wind... lvl If the value is greater than 13, then control the first target evaporator temperature T. eva =Min(Evaporator temperature upper limit: second target temperature);

[0058] If the air volume level is Wind lvl If the temperature is ≤13, then control the target evaporator temperature T. eva =Min(Second evaporator temperature reference value: second target temperature);

[0059] If the temperature is less than or equal to the upper limit of the evaporator temperature, then determine the airflow level. If the airflow level is Wind lvl If the value is greater than 13, then the target evaporator temperature T should be controlled. eva = Reference temperature value for the first evaporator; air volume rating (Wind) lvl If the temperature is ≤13, then control the target evaporator temperature T. eva =Min(First evaporator temperature reference value: lower limit of evaporator temperature).

[0060] Optionally, in one embodiment of this application, a corresponding defogging strategy is matched based on the vehicle's external environmental parameters and vehicle state parameters, and a first target temperature and circulation condition of the evaporator are determined based on the defogging strategy, including: when the ambient rainfall level corresponding to the rainfall is a preset heavy rain level or a preset torrential rain level, the defogging strategy is determined to control the vehicle to perform full internal circulation control on the internal and external circulation dampers; when the ambient rainfall level is a preset light rain level or a preset moderate rain level, based on the external environmental parameters, it is determined whether the ambient temperature is greater than a second preset temperature threshold; if the ambient temperature is greater than the second preset temperature threshold, the defogging strategy is determined to control the vehicle to perform full internal circulation control on the internal and external circulation dampers, otherwise the vehicle is controlled to perform full external circulation control on the internal and external circulation dampers.

[0061] For example, embodiments of this application can classify rainfall levels Lvl based on rainfall. rain It is divided into four levels: 1 (light rain), 2 (moderate rain), 3 (heavy rain), and 4 (torrential rain).

[0062] The current rainfall level can be determined by using a four-in-one rain gauge, light, and humidity sensor.

[0063] If the rainfall level is Lvl rain =3 or 4, then full internal circulation control is implemented for the internal and external circulation dampers; if the rainfall level Lvl rain =1 or 2, proceed to the next judgment;

[0064] The ambient temperature T can be determined using an external temperature sensor in this embodiment of the application. am If the temperature exceeds a certain threshold, then full internal circulation control is applied to the internal and external circulation dampers.

[0065] If the temperature is less than or equal to a certain temperature threshold, then full external circulation control is implemented for the internal and external circulation dampers.

[0066] It should be noted that the second preset temperature threshold can be set by those skilled in the art according to the actual situation, and no specific restrictions are imposed here.

[0067] Combination Figure 2 As shown, the working principle of the vehicle defogging method of this application embodiment is illustrated by an example.

[0068] like Figure 2 As shown, embodiments of this application may include the following steps:

[0069] Step S1: Define the lowest ambient temperature suitable for dehumidifying the vehicle interior using the evaporator temperature as T. min When the ambient temperature T am Greater than T min Then proceed to the next step.

[0070] Step S2: Fogging detection:

[0071] The fogging risk level R inside the vehicle is calculated by collecting data such as dew point temperature, glass temperature, in-vehicle humidity, ambient temperature, rainfall, number of occupants, and vehicle speed through bus data.

[0072] By performing static and dynamic calibrations on a real vehicle at different temperature points, the corresponding fogging point R was determined. h and defogging point R l The fog initiation and defogging points between adjacent temperature points can be calculated using the difference.

[0073] When R > R h Execute steps S3 and S4 to perform automatic defogging control;

[0074] When R < R h If not, automatic defogging control will not be executed.

[0075] Step S3: Control of internal and external circulation dampers:

[0076] Rainfall levels (Lvlrain) are divided into four categories: 1 (light rain), 2 (moderate rain), 3 (heavy rain), and 4 (torrential rain).

[0077] The embodiments of this application can classify rainfall levels Lvl based on rainfall. rain It is divided into four levels: 1 (light rain), 2 (moderate rain), 3 (heavy rain), and 4 (torrential rain).

[0078] The current rainfall level is determined by a four-in-one rain, light, and humidity sensor; if the rainfall level is Lvl... rain =3 or 4, then full internal circulation control is implemented for the internal and external circulation dampers; if the rainfall level Lvl rain =1 or 2, proceed to the next judgment.

[0079] Determine T using an external temperature sensor. am Is it greater than 15℃? If T am If the temperature is >15℃, then full internal circulation control will be implemented for the internal and external circulation dampers; if T am If the temperature is ≤15℃, then the internal and external circulation dampers will be controlled to operate with full external circulation.

[0080] Step S4: Evaporator temperature control:

[0081] Taking a blower with a total air volume setting of 31 as an example, the air volume level Wind is defined. lvl ≤13 indicates low airflow; therefore, the airflow level Wind is defined. lvl >13 represents high airflow; the target evaporator temperature under non-automatic demisting control is defined as T1; the preset temperature difference is assumed to be 5℃; the reference value for the second evaporator temperature is 7℃; the upper limit of the evaporator temperature is 12℃; and the lower limit of the evaporator temperature is 1℃.

[0082] Determine T using an external temperature sensor. am Is -5℃ greater than 12℃?

[0083] If T am If -5℃ > 12℃, then determine the airflow level. If the airflow level is Wind lvl If the value is greater than 13, then the target evaporator temperature T should be controlled. eva =Min(12℃:T1); If the airflow level is Wind lvl If the temperature is ≤13, then control the target evaporator temperature T. eva =Min(7℃:T1);

[0084] If T am If the temperature is -5℃ to 12℃, then determine the airflow level. If the airflow level is Wind lvl If the value is greater than 13, then the target evaporator temperature T should be controlled. eva =T am-5℃; Wind volume rating lvl If the temperature is ≤13, then control the target evaporator temperature T. eva =Min(TT) am -5℃:1℃

[0085] Step S5: After executing steps S3 and S4, if R < R l If the automatic defogging control is engaged, the system will exit automatic defogging control and return to normal control mode.

[0086] In summary, the embodiments of this application can couple ambient temperature, rainfall level, blower air volume, etc., to perform different scene control on the target evaporator temperature and internal and external circulation dampers for automatic defogging. Scene subdivision can ensure that the automatic defogging effect is achieved in more operating conditions, reduce the energy consumption of air conditioning, and at the same time, because the air volume and air outlet mode are not changed, a better user experience can be brought.

[0087] The vehicle defogging method proposed in this application can calculate the vehicle's fogging risk level based on in-vehicle environmental parameters, vehicle status parameters, and external environmental parameters when the vehicle meets preset defogging conditions. If the fogging risk level is higher than the preset fogging level, a corresponding defogging strategy is matched based on the vehicle's external environmental parameters and vehicle status parameters. A first target temperature and circulation conditions for the evaporator are determined based on the defogging strategy, and the evaporator is driven to perform defogging according to the first target temperature and circulation conditions. This achieves automatic defogging while simultaneously saving energy without changing the airflow and direction. Therefore, this solves the technical problem in related technologies where the evaporator temperature is fixed, which is neither energy-efficient nor does it change the perceived airflow and direction during defogging, thus affecting the user's experience when using the air conditioning equipment.

[0088] Next, a vehicle defogging device according to an embodiment of this application is described with reference to the accompanying drawings.

[0089] Figure 3 This is a block diagram of a vehicle defogging device according to an embodiment of this application.

[0090] like Figure 3 As shown, the vehicle's defogging device 10 includes: a detection module 100, a calculation module 200, and a defogging module 300.

[0091] Specifically, the detection module 100 is used to detect whether the vehicle meets the preset defogging conditions.

[0092] The calculation module 200 is used to calculate the fogging risk level of the vehicle based on the vehicle's in-vehicle environmental parameters, vehicle status parameters, and external environmental parameters when the vehicle is detected to meet the preset defogging conditions.

[0093] The defogging module 300 is used to match the corresponding defogging strategy according to the vehicle's external environmental parameters and vehicle status parameters when the fogging risk level is greater than the preset fogging level, and to determine the first target temperature and cycle conditions of the evaporator based on the defogging strategy, so as to drive the evaporator to perform defogging according to the first target temperature and cycle conditions.

[0094] Optionally, in one embodiment of this application, the in-vehicle environmental parameters include at least one of glass temperature and in-vehicle humidity; the vehicle status parameters include at least one of vehicle speed, number of occupants, and blower airflow; and the external environmental parameters include at least one of dew point temperature, ambient temperature, and rainfall.

[0095] Optionally, in one embodiment of this application, the detection module 100 includes: a first judgment unit and a first determination unit.

[0096] The first judgment unit is used to determine whether the ambient temperature is greater than a first preset temperature threshold, wherein the first preset temperature threshold is obtained from the lowest ambient temperature when the vehicle uses the evaporator temperature to dehumidify the interior.

[0097] The first determining unit is used to determine that the vehicle meets the preset defogging conditions when the ambient temperature is greater than the first preset temperature threshold.

[0098] Optionally, in one embodiment of this application, the defogging module 300 includes: a second judgment unit, a third judgment unit, a second determination unit, a third determination unit, a fourth determination unit, and a fifth determination unit.

[0099] The second judgment unit is used to obtain a first evaporator temperature reference value based on the ambient temperature and the preset temperature difference, and to determine whether the first evaporator temperature reference value is greater than the preset upper limit value of the evaporator temperature.

[0100] The third judgment unit is used to determine whether the air volume level corresponding to the blower air volume is greater than the preset level threshold based on the blower air volume.

[0101] The second determining unit is used to determine, when the first evaporator temperature reference value is greater than the preset evaporator temperature upper limit value and the air volume level is greater than the preset level threshold value, the first target temperature in the demisting strategy is obtained from the minimum value between the preset evaporator temperature upper limit value and the second target temperature under non-demisting conditions.

[0102] The third determining unit is used to determine the first target temperature in the demisting strategy by obtaining the second evaporator temperature reference value based on the preset evaporator temperature upper limit value and the first evaporator temperature reference value when the first evaporator temperature reference value is greater than the preset evaporator temperature upper limit value and the air volume level is less than or equal to the preset level threshold value.

[0103] The fourth determining unit is used to determine the first target temperature in the demisting strategy as the first evaporator reference value when the first evaporator temperature reference value is less than or equal to the preset upper limit of evaporator temperature and the air volume level is greater than the preset level threshold.

[0104] The fifth determining unit is used to determine the first target temperature in the demisting strategy as the preset lower limit of the evaporator temperature when the first evaporator temperature reference value is less than or equal to the preset upper limit of the evaporator temperature and the air volume level is less than or equal to the preset level threshold.

[0105] Optionally, in one embodiment of this application, the defogging module 300 includes: a sixth determining unit, a fourth judging unit, and a seventh determining unit.

[0106] The sixth determining unit is used to determine the defogging strategy as controlling the vehicle to perform full internal circulation control on the internal and external circulation dampers when the environmental rainfall level corresponding to the rainfall is a preset heavy rain level or a preset rainstorm level.

[0107] The fourth judgment unit is used to determine whether the ambient temperature is greater than the second preset temperature threshold based on the external environmental parameters when the ambient rainfall level is a preset light rain level or a preset moderate rain level.

[0108] The seventh determining unit is used to determine the defogging strategy as follows: if the ambient temperature is greater than the second preset temperature threshold, control the vehicle to perform full internal circulation control on the internal and external circulation dampers; otherwise, control the vehicle to perform full external circulation control on the internal and external circulation dampers.

[0109] It should be noted that the foregoing explanation of the vehicle defogging method embodiment also applies to the vehicle defogging device of this embodiment, and will not be repeated here.

[0110] The vehicle defogging device proposed in this application can calculate the vehicle's fogging risk level based on in-vehicle environmental parameters, vehicle status parameters, and external environmental parameters when the vehicle meets preset defogging conditions. If the fogging risk level is higher than the preset fogging level, a corresponding defogging strategy is matched based on the external environmental parameters and vehicle status parameters. The first target temperature and circulation conditions of the evaporator are determined based on the defogging strategy, and the evaporator is driven to perform defogging according to the first target temperature and circulation conditions. This achieves automatic defogging while simultaneously saving energy without changing the airflow and direction. Therefore, this solves the technical problem in related technologies where the evaporator temperature is fixed, which is neither energy-efficient nor does it change the perceived airflow and direction during defogging, thus affecting the user's experience when using the air conditioning equipment.

[0111] Figure 4A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include:

[0112] The memory 401, the processor 402, and the computer program stored on the memory 401 and capable of running on the processor 402.

[0113] When processor 402 executes the program, it implements the vehicle defogging method provided in the above embodiments.

[0114] Furthermore, the vehicle also includes:

[0115] Communication interface 403 is used for communication between memory 401 and processor 402.

[0116] The memory 401 is used to store computer programs that can run on the processor 402.

[0117] The memory 401 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0118] If the memory 401, processor 402, and communication interface 403 are implemented independently, then the communication interface 403, memory 401, and processor 402 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be divided into address buses, data buses, control buses, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0119] Optionally, in a specific implementation, if the memory 401, processor 402, and communication interface 403 are integrated on a single chip, then the memory 401, processor 402, and communication interface 403 can communicate with each other through an internal interface.

[0120] Processor 402 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0121] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the vehicle defogging method described above.

[0122] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the vehicle defogging method provided in this embodiment of the invention.

[0123] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0124] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0125] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0126] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0127] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0128] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments.

[0129] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0130] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A defogging method of a vehicle, characterized by, The method comprises the following steps: detecting whether the vehicle meets a preset defogging condition; in a case where it is detected that the vehicle meets the preset defogging condition, calculating a fogging risk level of the vehicle according to an in-vehicle environment parameter, a vehicle state parameter and an out-of-vehicle environment parameter of the vehicle; in a case where the fogging risk level is greater than a preset fogging level, matching a corresponding defogging strategy according to the out-of-vehicle environment parameter and the vehicle state parameter of the vehicle, and determining a first target temperature and a circulation condition of an evaporator based on the defogging strategy, so as to drive the evaporator to defog in the first target temperature and the circulation condition; the in-vehicle environment parameter comprises a glass temperature and an in-vehicle humidity; the vehicle state parameter comprises a vehicle speed, a number of passengers and a blower air volume; the out-of-vehicle environment parameter comprises a dew point temperature, an environment temperature and a rainfall; the matching of the corresponding defogging strategy according to the out-of-vehicle environment parameter and the vehicle state parameter of the vehicle, and the determination of the first target temperature and the circulation condition of the evaporator based on the defogging strategy, comprise: obtaining a first evaporator temperature reference value based on the environment temperature and a preset temperature difference, and judging whether the first evaporator temperature reference value is greater than a preset upper limit value of an evaporator temperature; the preset temperature difference is a difference margin between the environment temperature and the evaporator temperature; judging whether a wind volume level corresponding to the blower air volume is greater than a preset level threshold value according to the blower air volume; in a case where the first evaporator temperature reference value is greater than the preset upper limit value of the evaporator temperature, and the wind volume level is greater than the preset level threshold value, determining that the first target temperature in the defogging strategy is obtained from a minimum value between the preset upper limit value of the evaporator temperature and a second target temperature in a non-defogging condition.

2. The method of claim 1, wherein, the detection of whether the vehicle meets the preset defogging condition comprises: judging whether the environment temperature is greater than a first preset temperature threshold value, wherein the first preset temperature threshold value is obtained from a lowest environment temperature when the vehicle dehumidifies in-vehicle air by using the evaporator temperature; if the environment temperature is greater than the first preset temperature threshold value, it is determined that the vehicle meets the preset defogging condition.

3. The method of claim 1, wherein, the matching of the corresponding defogging strategy according to the out-of-vehicle environment parameter and the vehicle state parameter of the vehicle, and the determination of the first target temperature and the circulation condition of the evaporator based on the defogging strategy, further comprise: in a case where the first evaporator temperature reference value is greater than the preset upper limit value of the evaporator temperature, and the wind volume level is less than or equal to the preset level threshold value, obtaining a second evaporator temperature reference value based on the preset upper limit value of the evaporator temperature and the first evaporator temperature reference value, and determining that the first target temperature in the defogging strategy is obtained from a minimum value between the second evaporator temperature reference value and the second target temperature; in a case where the first evaporator temperature reference value is less than or equal to the preset upper limit value of the evaporator temperature, and the wind volume level is greater than the preset level threshold value, it is determined that the first target temperature in the defogging strategy is the first evaporator temperature reference value. In a case where the first evaporator temperature reference value is less than or equal to the preset upper limit of the evaporator temperature and the air volume level is less than or equal to the preset level threshold, the first target temperature in the defogging strategy is determined as a preset lower limit of the evaporator temperature.

4. The method of claim 1, wherein, The matching of the corresponding defogging strategy according to the vehicle external environment parameter and the vehicle state parameter, and the determination of the first target temperature and the circulating working condition of the evaporator based on the defogging strategy, comprise: In a case where the rain amount corresponds to a preset heavy rain level or a preset storm level, the defogging strategy is determined as controlling the vehicle to perform full internal circulation control on the internal and external circulation air doors; In a case where the rain amount corresponds to a preset heavy rain level or a preset storm level, the defogging strategy is determined as controlling the vehicle to perform full internal circulation control on the internal and external circulation air doors; In a case where the rain amount corresponds to a preset heavy rain level or a preset storm level, the defogging strategy is determined as controlling the vehicle to perform full internal circulation control on the internal and external circulation air doors; 5. A defogging device for a vehicle, characterized by comprising: Comprise: The detection module is configured to detect whether the vehicle satisfies a preset defogging condition; The calculation module is configured to, in a case where it is detected that the vehicle satisfies the preset defogging condition, calculate a fogging risk level of the vehicle according to a vehicle internal environment parameter, a vehicle state parameter and a vehicle external environment parameter; The defogging module is configured to, in a case where the fogging risk level is greater than a preset fogging level, match a corresponding defogging strategy according to the vehicle external environment parameter and the vehicle state parameter, and determine a first target temperature and a circulating working condition of the evaporator based on the defogging strategy, so as to drive the evaporator to defog according to the first target temperature and the circulating working condition. The vehicle internal environment parameter comprises a glass temperature and an internal humidity; the vehicle state parameter comprises a vehicle speed, a number of passengers and a blower air volume; and the vehicle external environment parameter comprises a dew point temperature, an environment temperature and a rain amount. The matching of the corresponding defogging strategy according to the vehicle external environment parameter and the vehicle state parameter, and the determination of the first target temperature and the circulating working condition of the evaporator based on the defogging strategy, comprise: A first evaporator temperature reference value is obtained based on the environment temperature and a preset temperature difference, and it is determined whether the first evaporator temperature reference value is greater than a preset upper limit of the evaporator temperature; The preset temperature difference is a difference margin between the environment temperature and the evaporator temperature; It is determined whether an air volume level corresponding to the blower air volume is greater than a preset level threshold according to the blower air volume; In a case where the first evaporator temperature reference value is greater than the preset upper limit of the evaporator temperature and the air volume level is greater than the preset level threshold, the first target temperature in the defogging strategy is determined as a minimum value of the preset upper limit of the evaporator temperature and a second target temperature in a non-defogging working condition.

6. The apparatus of claim 5, wherein, The detection module comprises: A judgment unit is configured to judge whether the environment temperature is greater than a first preset temperature threshold, wherein the first preset temperature threshold is obtained by the vehicle using the evaporator temperature to dehumidify in the vehicle. The determining unit is configured to determine that the vehicle satisfies the preset defogging condition when the ambient temperature is greater than the first preset temperature threshold.

7. A vehicle characterized by comprising: The method comprises: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the defogging method of the vehicle according to any one of claims 1-4.

8. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the defogging method of the vehicle according to any one of claims 1-4.

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