Vehicle, and air outlet temperature control method and control device thereof, and storage medium

Abstract

The application discloses a vehicle and an air outlet temperature control method and control device thereof and a storage medium. The method comprises the following steps: when an air conditioner is in a heating foot blowing mode, a blowing surface air door is controlled to open a first preset angle, and a foot blowing air door is controlled to open a second preset angle, wherein the first preset angle is smaller than the second preset angle; an actual blowing surface temperature at the blowing surface air door is obtained; an actual foot blowing temperature at the foot blowing air door is estimated according to the actual blowing surface temperature; and a heater of the air conditioner is controlled according to the actual foot blowing temperature and a target foot blowing temperature. The control method can eliminate interference caused by changes in external factors, has a wider use scene, and is more accurate in temperature control.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a vehicle outlet air temperature control method, a vehicle outlet air temperature control device, a computer-readable storage medium, and a vehicle. Background Technology

[0002] For vehicles that use a fan heater for rear air conditioning heating, since the rear air conditioning foot vent temperature sensor has been removed, in order to achieve accurate control of the foot vent temperature, a control strategy needs to be added to estimate the actual foot vent temperature as feedback to control the heater power, thereby controlling the foot vent temperature.

[0003] Current technologies estimate foot outlet temperature by scanning points using the inlet air temperature and air volume. However, this method cannot cover all scenarios, leading to inaccurate outlet temperature estimates under certain conditions. For example, in high-altitude conditions where air density is lower, the actual outlet temperature is higher than the estimated outlet temperature, causing the air conditioner's heater outlet temperature to be too high, posing a risk of burns and thermal failure of components. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to propose a method for controlling the air outlet temperature of a vehicle. This method obtains the actual airflow temperature at the face-blowing damper and estimates the actual foot-blowing temperature at the foot-blowing damper based on the actual face-blowing temperature. The heater of the air conditioner is then controlled based on the actual foot-blowing temperature and the target foot-blowing temperature. This eliminates interference caused by changes in external factors, has a wider range of applications, and provides rapid and more accurate temperature control.

[0005] The second objective of this invention is to provide a vehicle exhaust temperature control device.

[0006] A third objective of this invention is to provide a computer-readable storage medium.

[0007] The fourth objective of this invention is to provide a vehicle.

[0008] To achieve the above objectives, a first aspect of the present invention provides a method for controlling the air outlet temperature of a vehicle. The method includes: when the air conditioner is in a heating foot-blowing mode, controlling the face-blowing damper to open at a first preset angle and controlling the foot-blowing damper to open at a second preset angle, wherein the first preset angle is smaller than the second preset angle; obtaining the actual face-blowing temperature at the face-blowing damper; estimating the actual foot-blowing temperature at the foot-blowing damper based on the actual face-blowing temperature; and controlling the heater of the air conditioner based on the actual foot-blowing temperature and the target foot-blowing temperature.

[0009] According to the vehicle air outlet temperature control method of the present invention, firstly, when the air conditioner is in heating foot-blowing mode, the face-blowing damper is controlled to open at a first preset angle, and the foot-blowing damper is controlled to open at a second preset angle, wherein the first preset angle is smaller than the second preset angle. Then, the actual face-blowing temperature at the face-blowing damper is obtained, and the actual foot-blowing temperature at the foot-blowing damper is estimated based on the actual face-blowing temperature. Finally, the air conditioner's heater is controlled based on the actual foot-blowing temperature and the target foot-blowing temperature. Therefore, this method can eliminate interference caused by changes in external factors, has a wider range of applications, and provides rapid response and more accurate temperature control.

[0010] In addition, the vehicle outlet air temperature control method according to the above embodiments of the present invention may also have the following additional technical features:

[0011] According to one embodiment of the present invention, estimating the actual foot temperature at the foot vent based on the actual face temperature includes: obtaining the fan airflow of the air conditioner and the actual vehicle interior temperature; determining the heat loss coefficient of the face duct based on the fan airflow and the actual vehicle interior temperature; and estimating the actual foot temperature based on the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient.

[0012] According to an embodiment of the present invention, determining the heat loss coefficient of the airflow duct based on the fan air volume and the actual vehicle interior temperature includes: obtaining the heat loss coefficient based on the fan air volume, the actual vehicle interior temperature and a preset mapping relationship, wherein the preset mapping relationship is used to indicate the relationship between the fan air volume, the actual vehicle interior temperature and the heat loss coefficient.

[0013] According to one embodiment of the present invention, estimating the actual foot temperature based on the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient includes:

[0014] The actual face temperature and the actual vehicle interior temperature are corrected based on the heat loss coefficient to obtain the corrected face temperature and the corrected vehicle interior temperature; the temperature difference between the corrected face temperature and the corrected vehicle interior temperature is obtained to obtain the actual foot temperature.

[0015] According to one embodiment of the present invention, the step of correcting the actual blowing temperature and the actual vehicle interior temperature based on the heat loss coefficient to obtain the corrected blowing temperature and the corrected vehicle interior temperature includes: obtaining the reciprocal of the heat loss coefficient to obtain a first coefficient, and obtaining the difference between the reciprocal of the first coefficient and 1 to obtain a second coefficient; obtaining the product of the actual blowing temperature and the first coefficient to obtain the corrected blowing temperature, and obtaining the product of the actual vehicle interior temperature and the second coefficient to obtain the corrected vehicle interior temperature.

[0016] According to one embodiment of the present invention, controlling the heater of the air conditioner based on the actual foot temperature and the target foot temperature includes: determining the duty cycle adjustment amount of the heater based on the temperature difference between the target foot temperature and the actual foot temperature; determining the target duty cycle of the heater based on the current duty cycle of the heater and the duty cycle adjustment amount; and controlling the heater based on the target duty cycle.

[0017] According to one embodiment of the present invention, the first preset opening degree is the opening degree corresponding to the maximum air volume of the air conditioner fan and the air volume at the air blowing damper being less than the preset air volume.

[0018] To achieve the above objectives, a second aspect of the present invention provides a vehicle air outlet temperature control device, comprising: a control module, configured to control the opening of the face air vent to a first preset angle and the opening of the foot air vent to a second preset angle when the air conditioner is in heating foot blowing mode, wherein the first preset angle is smaller than the second preset angle; an acquisition module, configured to acquire the actual face blowing temperature at the face air vent; an estimation module, configured to estimate the actual foot blowing temperature at the foot air vent based on the actual face blowing temperature; the control module is further configured to control the heater of the air conditioner based on the actual foot blowing temperature and the target foot blowing temperature.

[0019] According to an embodiment of the vehicle air outlet temperature control device of the present invention, the control module is used to control the opening angle of the face air damper to a first preset angle and the opening angle of the foot air damper to a second preset angle when the air conditioner is in the heating foot-blowing mode, wherein the first preset angle is smaller than the second preset angle; the acquisition module is used to acquire the actual face air temperature at the face air damper; the estimation module is used to estimate the actual foot air temperature at the foot air damper based on the actual face air temperature; and the control module is also used to control the heater of the air conditioner based on the actual foot air temperature and the target foot air temperature. Therefore, this device can eliminate interference caused by changes in external factors, has a wider range of applications, and provides rapid response and more accurate temperature control.

[0020] To achieve the above objectives, a third aspect of the present invention provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the above-described vehicle exhaust temperature control method.

[0021] The computer-readable storage medium according to embodiments of the present invention implements the above-described vehicle air outlet temperature control method during execution, which can eliminate interference caused by changes in external factors, has a wider range of applications, and provides faster response and more accurate temperature control.

[0022] To achieve the above objectives, a vehicle is provided in a fourth aspect of the present invention, including a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements the above-described vehicle outlet air temperature control method.

[0023] The vehicle according to the embodiments of the present invention, by executing the above-described vehicle outlet temperature control method, can eliminate interference caused by changes in external factors, has a wider range of applications, and responds quickly with more accurate temperature control.

[0024] Additional aspects and advantages of the invention 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 the invention. Attached Figure Description

[0025] Figure 1 A flowchart of a vehicle outlet air temperature control method according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the air conditioning unit structure according to an embodiment of the present invention;

[0027] Figure 3 A flowchart illustrating a vehicle outlet air temperature control method according to a specific example of the present invention;

[0028] Figure 4 This is a block diagram of a vehicle exhaust temperature control device according to an embodiment of the present invention;

[0029] Figure 5 This is a block diagram of a vehicle according to an embodiment of the present invention. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated 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 the present invention, and should not be construed as limiting the present invention.

[0031] The vehicle outlet temperature control method, vehicle outlet temperature control device, computer-readable storage medium, and vehicle proposed in the embodiments of the present invention are described below with reference to the accompanying drawings.

[0032] Figure 1 This is a flowchart of a vehicle outlet air temperature control method according to an embodiment of the present invention.

[0033] like Figure 1 As shown, the vehicle outlet air temperature control method of this invention may include the following steps:

[0034] S1, when the air conditioner is in the heating and foot blowing mode, control the face blowing damper to open at a first preset angle and control the foot blowing damper to open at a second preset angle, wherein the first preset angle is smaller than the second preset angle.

[0035] S2, obtain the actual blowing temperature at the blowing damper.

[0036] S3, estimate the actual foot temperature at the foot blowing damper based on the actual face blowing temperature.

[0037] S4 controls the heater of the air conditioner based on the actual foot temperature and the target foot temperature.

[0038] Specifically, for the rear air conditioning system, the user can determine the current operating mode based on their needs, or the system can automatically determine the operating mode based on the current environment. For example, in summer, when the user feels hot, the cooling face-blowing mode can be activated, directing the airflow towards the user's face to quickly cool them down. Similarly, in winter, when the user feels cold, the heating face-blowing mode can be activated, directing the airflow towards the user's face. To prevent dryness and drowsiness from prolonged exposure to hot air, a heating foot-blowing mode can be activated to raise the interior temperature, directing the airflow towards the user's feet to improve comfort. Alternatively, a heating face-blowing and foot-blowing mode can be activated simultaneously, blowing air onto both the user's face and feet. To ensure that the actual temperature of the air vents is close to the target temperature (set by the user), temperature sensors can be installed at the vents, and appropriate algorithms can be used to control the actual temperature of the air vents.

[0039] To save costs, for rear exhaust vents, such as Figure 2 As shown, only a face-blowing temperature sensor is installed. For ease of explanation, the entire airflow damper is divided into a face-blowing damper and a foot-blowing damper by a baffle. Air heated by the heater passes through the face-blowing duct and is blown towards the user's face through the face-blowing damper. Air passes through the foot-blowing duct and is blown towards the user's feet through the foot-blowing damper. In face-blowing mode, the air conditioner's heater is controlled based on the actual face-blowing temperature obtained from the face-blowing temperature sensor and the target face-blowing temperature (the user-set temperature) to ensure the actual face-blowing temperature is close to the target temperature. In face-blowing and foot-blowing mode, the face and foot-blowing temperatures are essentially the same. When controlling these temperatures, the air conditioner's heater is controlled according to the actual and target face-blowing temperatures obtained from the face-blowing temperature sensor. Currently, in heating foot-blowing mode, the actual foot-blowing temperature can be estimated from the actual face-blowing temperature, thus adjusting the foot-blowing temperature accordingly.

[0040] In the heated feet mode, the face-blowing damper can be controlled to open at a first preset angle, and the feet-blowing damper can be controlled to open at a second preset angle. For example, the dampers can be changed from 0% face-blowing and 100% feet-blowing (the dampers are fully open towards the feet) to 15% face-blowing and 85% feet-blowing (the face-blowing and feet-blowing dampers are respectively opened at the first and second preset angles). It should be noted that the first preset angle is smaller than the second preset angle, meaning the face-blowing damper only opens at a smaller angle to obtain the actual face-blowing temperature at the damper, rather than blowing air directly onto the user's face.

[0041] When obtaining the actual blowing temperature at the face-blowing damper, a face-blowing temperature sensor can be installed at the damper location, and the actual blowing temperature can then be obtained from the sensor. After determining the actual blowing temperature, the actual foot-blowing temperature at the foot-blowing damper can be estimated based on it. For example, a proportionality coefficient for converting the actual blowing temperature to the actual foot-blowing temperature can be obtained, and the actual foot-blowing temperature can be estimated based on the actual blowing temperature and the proportionality coefficient. When the airflow or the interior temperature changes, the actual blowing temperature will change. Similarly, the real-time changes from the face-blowing sensor can be corrected as feedback for the foot-blowing temperature. Thus, even without a foot-blowing temperature sensor, an accurate estimation of the actual foot-blowing temperature can be achieved by correcting the actual values ​​collected by the face-blowing temperature sensor. This eliminates interference from changes in outdoor air density and humidity, broadening the application scenarios.

[0042] After determining the actual foot temperature, the heater of the air conditioner can be controlled according to the actual foot temperature and the target foot temperature. For example, when the actual foot temperature is greater than the target foot temperature, the heater can be controlled to stop heating so that the actual temperature is close to the target foot temperature. When the actual foot temperature is less than the target foot temperature, the heater can be controlled to continue running until the actual foot temperature reaches the target foot temperature, at which point the heater can be controlled to stop heating to save electricity.

[0043] Therefore, by obtaining the actual blowing temperature at the blowing air damper and estimating the actual blowing temperature at the foot air damper based on the actual blowing temperature, the heater of the air conditioner can be controlled according to the actual blowing temperature and the target blowing temperature. This eliminates interference caused by changes in external factors, has a wider range of applications, and provides faster response and more accurate temperature control.

[0044] According to one embodiment of the present invention, estimating the actual foot temperature at the foot vent based on the actual face temperature includes: obtaining the airflow of the air conditioner fan and the actual vehicle interior temperature; determining the heat loss coefficient of the face duct based on the airflow and the actual vehicle interior temperature; and estimating the actual foot temperature based on the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient.

[0045] Specifically, when estimating the actual foot temperature at the foot vent based on the actual face temperature, the airflow of the air conditioner and the actual interior temperature of the vehicle are first obtained. For example, the airflow of the air conditioner can be obtained through an airflow sensor, and the actual interior temperature of the vehicle can be obtained through an interior temperature sensor. After obtaining the airflow and the actual interior temperature, the heat loss coefficient of the face duct can be determined based on the airflow and the actual interior temperature.

[0046] For example, by conducting a preliminary experiment, assuming that there is no heat loss in the current face-blowing duct, the actual face-blowing temperature (with the air damper at 100% face-blowing and 0% foot-blowing (all air dampers open towards the face)) should be the same as the actual foot-blowing temperature (with the air damper changed from 0% face-blowing and 100% foot-blowing (all air dampers open towards the feet)). However, when blowing the face, the airflow passing through the heater is small, and the temperature change is large, i.e., the heat loss is obvious, which can be denoted as x (heat loss coefficient). When blowing the feet, the airflow passing through the heater is large, and the loss is not obvious, so the heat loss can be ignored. Therefore, based on the principles of thermodynamics, we can derive Formula 1: Heater heat = Air specific heat capacity * Air mass passing through the heater * (Actual foot blowing temperature - Actual vehicle interior temperature), and Formula 2: Heater heat * x = Air specific heat capacity * Air mass passing through the heater * (Actual face blowing temperature - Actual vehicle interior temperature). Through experiments at different actual vehicle interior temperatures and fan air volumes, and by installing temperature sensors at the face blowing damper and foot blowing damper to obtain the actual face blowing temperature and actual foot blowing temperature, multiple heat loss coefficients x can be calculated.

[0047] After obtaining the heat loss coefficient, the actual foot temperature can be estimated based on the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient. For example, the actual foot temperature can be estimated by multiplying the actual face temperature by the heat loss coefficient and then subtracting the actual vehicle interior temperature multiplied by the heat loss coefficient. Alternatively, the actual foot temperature can be determined through a pre-defined relationship. For instance, by pre-determining the relationship between the actual face temperature, the actual vehicle interior temperature, the heat loss coefficient, and the actual foot temperature, the actual foot temperature can be obtained by directly calling the relationship after the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient are determined.

[0048] According to one embodiment of the present invention, determining the heat loss coefficient of the air blowing duct based on the fan air volume and the actual vehicle interior temperature includes: obtaining the heat loss coefficient based on the fan air volume, the actual vehicle interior temperature and a preset mapping relationship, wherein the preset mapping relationship is used to indicate the relationship between the fan air volume, the actual vehicle interior temperature and the heat loss coefficient.

[0049] Specifically, when determining the heat loss coefficient of the airflow duct based on the fan air volume and the actual vehicle interior temperature, the heat loss coefficient can be obtained by using the fan air volume, the actual vehicle interior temperature, and a preset mapping relationship. This preset mapping relationship can be pre-set and stored based on experiments. For example, after collecting data through the aforementioned experiments and storing it, the preset mapping relationship establishes a relationship between the fan air volume, the actual vehicle interior temperature, and the heat loss coefficient. After determining the fan air volume and the actual vehicle interior temperature, the heat loss coefficient can be determined based on the preset mapping relationship. It should be noted that the preset mapping relationship can be expressed as a functional expression or presented in tabular form; there is no limitation here.

[0050] According to one embodiment of the present invention, estimating the actual foot temperature based on the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient includes: correcting the actual face temperature and the actual vehicle interior temperature based on the heat loss coefficient to obtain the corrected face temperature and the corrected vehicle interior temperature; and obtaining the temperature difference between the corrected face temperature and the corrected vehicle interior temperature to obtain the actual foot temperature.

[0051] Specifically, when estimating the actual foot temperature based on the actual face temperature, actual vehicle interior temperature, and heat loss coefficient, the actual face temperature and actual vehicle interior temperature can be corrected separately using the heat loss coefficient. For example, this can be done by multiplying the heat loss coefficient by the actual face temperature and actual vehicle interior temperature, or by adding the heat loss coefficient to the actual face temperature and actual vehicle interior temperature. After obtaining the corrected face temperature and corrected vehicle interior temperature, the actual foot temperature can be calculated by subtracting the corrected vehicle interior temperature from the corrected face temperature.

[0052] According to one embodiment of the present invention, the actual blowing temperature and the actual vehicle interior temperature are corrected based on the heat loss coefficient to obtain the corrected blowing temperature and the corrected vehicle interior temperature, including: obtaining the reciprocal of the heat loss coefficient to obtain a first coefficient, and obtaining the difference between the first coefficient and 1 to obtain a second coefficient; obtaining the product of the actual blowing temperature and the first coefficient to obtain the corrected blowing temperature, and obtaining the product of the actual vehicle interior temperature and the second coefficient to obtain the corrected vehicle interior temperature.

[0053] Specifically, when correcting the actual blowing temperature and the actual vehicle interior temperature based on the heat loss coefficient to obtain the corrected blowing temperature and the corrected vehicle interior temperature, the reciprocal of the heat loss coefficient can be used as the first coefficient, and the difference between the first coefficient and 1 can be used as the second coefficient. After obtaining the first coefficient and the second coefficient, the product of the first coefficient and the actual blowing temperature can be used as the corrected blowing temperature, and the product of the second coefficient and the actual vehicle interior temperature can be used as the corrected vehicle interior temperature.

[0054] In summary, the actual foot temperature is equal to the corrected surface temperature minus the corrected interior temperature, thus establishing a correlation between the foot and surface air temperatures. The actual foot temperature can be determined based on the actual surface temperature, the actual interior temperature, the fan volume, and the heat loss coefficient.

[0055] According to one embodiment of the present invention, controlling the heater of an air conditioner based on the actual foot temperature and the target foot temperature includes: determining the duty cycle adjustment amount of the heater based on the temperature difference between the target foot temperature and the actual foot temperature; determining the target duty cycle of the heater based on the current duty cycle of the heater and the duty cycle adjustment amount; and controlling the heater based on the target duty cycle.

[0056] Specifically, the heater's duty cycle refers to the ratio of the actual working time to the total cycle time during the heater's operation. In heating mode, the heater operates and stops periodically. By adjusting the duty cycle, the heater's output power can be controlled, thereby affecting the indoor temperature.

[0057] When controlling the air conditioner's heater based on the actual and target foot temperature, the temperature difference between the two is first obtained. After obtaining this temperature difference, the heater's duty cycle adjustment is determined. The temperature difference can be positive or negative: a positive temperature difference (target temperature minus actual temperature) occurs when the target temperature is greater than the actual temperature, and a negative temperature difference (target temperature minus actual temperature) occurs when the target temperature is less than the actual temperature. The heater's duty cycle adjustment can be determined using a pre-stored table. For example, this table can store multiple temperature differences and duty cycle adjustments, with a one-to-one correspondence between the temperature difference and the adjustment. This means that once a temperature difference is determined, the corresponding heater's duty cycle adjustment can be determined based on this correspondence.

[0058] After determining the duty cycle adjustment amount, a target duty cycle for the heater can be determined based on the current duty cycle and the duty cycle adjustment amount. This allows the heater to heat according to the target duty cycle, thereby increasing or decreasing the actual foot temperature. For example, if the duty cycle adjustment amount is positive, it indicates that the current target foot temperature is too high, and the current actual foot temperature has not reached the target temperature. Therefore, the current duty cycle and the duty cycle adjustment amount can be added together, and the sum of the current duty cycle and the adjustment amount can be used as the target duty cycle. The heater can then be controlled according to the target duty cycle to increase the duty cycle, thereby increasing the actual foot temperature and bringing it closer to the target foot temperature. This rapid and accurate control improves the user experience. For example, when the duty cycle adjustment is negative, it indicates that the current actual foot temperature is high and exceeds the target foot temperature. Therefore, the current duty cycle of the heater can be subtracted from the duty cycle adjustment, and the difference between the current duty cycle and the duty cycle adjustment can be used as the target duty cycle of the heater. The heater can then be controlled according to the target duty cycle to reduce the duty cycle, thereby lowering the actual foot temperature and bringing it closer to the target foot temperature. This provides rapid and accurate control and improves the user experience.

[0059] According to one embodiment of the present invention, the first preset opening degree is the opening degree corresponding to when the air conditioner's fan air volume is at its maximum and the air volume at the airflow damper is less than the preset air volume. The preset air volume can be determined according to actual conditions.

[0060] Specifically, when the air conditioner is in the foot-blowing heating mode, the face-blowing damper is controlled to open at a first preset angle. The first preset opening can be calibrated, which is the opening corresponding to the condition that the air conditioner's fan is at its maximum setting (maximum fan airflow) and the airflow at the face-blowing damper is less than the preset airflow. In other words, in foot-blowing mode, the airflow from the face-blowing damper is minimized to avoid blowing air onto rear passengers. Therefore, the airflow at the face-blowing damper is ensured to be the amount of airflow that the user cannot feel when sitting in a normal position, and the opening at this time is determined to be the first preset opening.

[0061] The following is combined with Figure 3 The control method of the present invention will be described below.

[0062] As a specific example, the vehicle outlet air temperature control method of the present invention may include the following steps:

[0063] S101, when the air conditioner is in the heating and foot blowing mode, control the face blowing damper to open at a first preset angle, and control the foot blowing damper to open at a second preset angle.

[0064] S102, obtain the actual blowing temperature at the blowing damper, the air volume of the air conditioner fan, and the actual interior temperature of the vehicle.

[0065] S103 obtains the heat loss coefficient based on the fan air volume, the actual vehicle interior temperature, and the preset mapping relationship.

[0066] S104, obtain the reciprocal of the heat loss coefficient to get the first coefficient, and obtain the difference between the first coefficient and 1 to get the second coefficient.

[0067] S105, obtain the corrected blowing temperature by multiplying the actual blowing temperature by the first coefficient, and obtain the corrected vehicle interior temperature by multiplying the actual vehicle interior temperature by the second coefficient.

[0068] S106, obtain the temperature difference between the corrected blowing temperature and the corrected interior temperature to obtain the actual foot blowing temperature.

[0069] S107, determine the duty cycle adjustment amount of the heater based on the temperature difference between the target foot temperature and the actual foot temperature.

[0070] S108, determine the target duty cycle of the heater based on the current duty cycle and the duty cycle adjustment amount.

[0071] S109 controls the heater according to the target duty cycle.

[0072] According to the vehicle air outlet temperature control method of the present invention, firstly, when the air conditioner is in heating foot-blowing mode, the face-blowing damper is controlled to open at a first preset angle, and the foot-blowing damper is controlled to open at a second preset angle, wherein the first preset angle is smaller than the second preset angle. Then, the actual face-blowing temperature at the face-blowing damper is obtained, and the actual foot-blowing temperature at the foot-blowing damper is estimated based on the actual face-blowing temperature. Finally, the air conditioner's heater is controlled based on the actual foot-blowing temperature and the target foot-blowing temperature. Therefore, this method can eliminate interference caused by changes in external factors, has a wider range of applications, and provides rapid response and more accurate temperature control.

[0073] Corresponding to the above embodiments, the present invention also proposes a vehicle air outlet temperature control method.

[0074] like Figure 4 As shown, the vehicle air outlet temperature control 100 of this embodiment includes: a control module 110, an acquisition module 120 and an estimation module 130.

[0075] The control module 110 is used to control the opening angle of the face air damper to a first preset angle and the opening angle of the foot air damper to a second preset angle when the air conditioner is in heating foot-blowing mode, wherein the first preset angle is smaller than the second preset angle. The acquisition module 120 is used to acquire the actual face air temperature at the face air damper. The estimation module 130 is used to estimate the actual foot air temperature at the foot air damper based on the actual face air temperature. The control module 110 is also used to control the heater of the air conditioner based on the actual foot air temperature and the target foot air temperature.

[0076] According to one embodiment of the present invention, the estimation module 130 estimates the actual foot temperature at the foot vent based on the actual face temperature, specifically for: obtaining the airflow of the air conditioner fan and the actual vehicle interior temperature; determining the heat loss coefficient of the face duct based on the airflow of the fan and the actual vehicle interior temperature; and estimating the actual foot temperature based on the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient.

[0077] According to one embodiment of the present invention, the estimation module 130 determines the heat loss coefficient of the blowing air duct based on the fan air volume and the actual vehicle interior temperature. Specifically, it is used to: obtain the heat loss coefficient based on the fan air volume, the actual vehicle interior temperature and a preset mapping relationship, wherein the preset mapping relationship is used to indicate the relationship between the fan air volume, the actual vehicle interior temperature and the heat loss coefficient.

[0078] According to one embodiment of the present invention, the estimation module 130 estimates the actual foot temperature based on the actual face temperature, the actual vehicle interior temperature and the heat loss coefficient. Specifically, it is used to: correct the actual face temperature and the actual vehicle interior temperature based on the heat loss coefficient to obtain the corrected face temperature and the corrected vehicle interior temperature; and obtain the temperature difference between the corrected face temperature and the corrected vehicle interior temperature to obtain the actual foot temperature.

[0079] According to one embodiment of the present invention, the estimation module 130 corrects the actual blowing temperature and the actual vehicle interior temperature based on the heat loss coefficient to obtain the corrected blowing temperature and the corrected vehicle interior temperature. Specifically, it is used to: obtain the reciprocal of the heat loss coefficient to obtain a first coefficient, and obtain the difference between the first coefficient and 1 to obtain a second coefficient; obtain the product of the actual blowing temperature and the first coefficient to obtain the corrected blowing temperature, and obtain the product of the actual vehicle interior temperature and the second coefficient to obtain the corrected vehicle interior temperature.

[0080] According to one embodiment of the present invention, the control module 110 controls the heater of the air conditioner based on the actual foot temperature and the target foot temperature, specifically for: determining the duty cycle adjustment amount of the heater based on the temperature difference between the target foot temperature and the actual foot temperature; determining the target duty cycle of the heater based on the current duty cycle of the heater and the duty cycle adjustment amount; and controlling the heater based on the target duty cycle.

[0081] According to one embodiment of the present invention, the first preset opening degree is the opening degree corresponding to the maximum air volume of the air conditioner fan and the air volume at the air blowing damper being less than the preset air volume.

[0082] It should be noted that for details not disclosed in the vehicle air outlet temperature control device of this embodiment, please refer to the details disclosed in the vehicle air outlet temperature control method of this embodiment, which will not be repeated here.

[0083] According to an embodiment of the vehicle air outlet temperature control device of the present invention, the control module is used to control the opening angle of the face air damper to a first preset angle and the opening angle of the foot air damper to a second preset angle when the air conditioner is in the heating foot-blowing mode, wherein the first preset angle is smaller than the second preset angle; the acquisition module is used to acquire the actual face air temperature at the face air damper; the estimation module is used to estimate the actual foot air temperature at the foot air damper based on the actual face air temperature; and the control module is also used to control the heater of the air conditioner based on the actual foot air temperature and the target foot air temperature. Therefore, this device can eliminate interference caused by changes in external factors, has a wider range of applications, and provides rapid response and more accurate temperature control.

[0084] Corresponding to the above embodiments, the present invention also proposes a computer-readable storage medium.

[0085] The computer-readable storage medium of this invention stores a program that, when executed by a processor, implements the above-described vehicle air outlet temperature control method.

[0086] According to embodiments of the present invention, the computer-readable storage medium, by executing the above-described vehicle air outlet temperature control method, can eliminate interference caused by changes in external factors, has a wider range of applications, and provides faster response and more accurate temperature control.

[0087] Corresponding to the above embodiments, the present invention also proposes a vehicle.

[0088] like Figure 5 As shown, the vehicle 200 of this embodiment may include: a memory 210, a processor 220, and a program stored in the memory 210 and executable on the processor 220. When the processor 220 executes the program, it implements the above-mentioned vehicle air outlet temperature control method.

[0089] The vehicle according to the embodiments of the present invention, by executing the above-described vehicle outlet temperature control method, can eliminate interference caused by changes in external factors, has a wider range of applications, and responds quickly with more accurate temperature control.

[0090] It should be noted that 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, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0091] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in 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.

[0092] In the description of this specification, 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 the invention. 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.

[0093] 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 invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0094] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0095] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for controlling the temperature of vehicle exhaust air, characterized in that, The method includes: When the air conditioner is in the heating and foot blowing mode, the face blowing damper is controlled to open at a first preset angle, and the foot blowing damper is controlled to open at a second preset angle, wherein the first preset angle is smaller than the second preset angle; Obtain the actual blowing temperature at the blowing damper; Estimating the actual foot temperature at the foot air vent based on the actual face temperature includes: obtaining the airflow of the air conditioner fan and the actual vehicle interior temperature; determining the heat loss coefficient of the face air duct based on the airflow of the fan and the actual vehicle interior temperature; and estimating the actual foot temperature based on the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient. The heater of the air conditioner is controlled according to the actual foot temperature and the target foot temperature; The step of estimating the actual foot temperature based on the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient includes: The actual blowing temperature and the actual vehicle interior temperature are corrected based on the heat loss coefficient to obtain the corrected blowing temperature and the corrected vehicle interior temperature. This includes: obtaining the reciprocal of the heat loss coefficient to obtain a first coefficient, and obtaining the difference between the first coefficient and 1 to obtain a second coefficient; obtaining the product of the actual blowing temperature and the first coefficient to obtain the corrected blowing temperature, and obtaining the product of the actual vehicle interior temperature and the second coefficient to obtain the corrected vehicle interior temperature. The actual foot temperature is obtained by acquiring the temperature difference between the corrected blowing surface temperature and the corrected vehicle interior temperature.

2. The method according to claim 1, characterized in that, The step of determining the heat loss coefficient of the blowing air duct based on the fan air volume and the actual vehicle interior temperature includes: The heat loss coefficient is obtained based on the fan air volume, the actual vehicle interior temperature, and a preset mapping relationship, wherein the preset mapping relationship is used to indicate the relationship between the fan air volume, the actual vehicle interior temperature, and the heat loss coefficient.

3. The method according to claim 1, characterized in that, The step of controlling the heater of the air conditioner based on the actual foot temperature and the target foot temperature includes: The duty cycle adjustment amount of the heater is determined based on the temperature difference between the target foot temperature and the actual foot temperature. The target duty cycle of the heater is determined based on the current duty cycle of the heater and the duty cycle adjustment amount; The heater is controlled according to the target duty cycle.

4. The method according to claim 1, characterized in that, The first preset opening degree is the opening degree corresponding to the maximum air volume of the air conditioner's fan and the air volume at the air blowing damper being less than the preset air volume.

5. A vehicle outlet air temperature control device, applied to the vehicle outlet air temperature control method according to any one of claims 1-4, characterized in that, The device includes: The control module is used to control the face air damper to open at a first preset angle and the foot air damper to open at a second preset angle when the air conditioner is in the heating foot air mode, wherein the first preset angle is smaller than the second preset angle. The acquisition module is used to acquire the actual blowing temperature at the blowing damper. An estimation module is used to estimate the actual foot temperature at the foot air vent based on the actual face temperature, including: acquiring the fan air volume of the air conditioner and the actual vehicle interior temperature; determining the heat loss coefficient of the face air duct based on the fan air volume and the actual vehicle interior temperature; and estimating the actual foot temperature based on the actual face temperature, the actual vehicle interior temperature, and the heat loss coefficient. The control module is also used to control the heater of the air conditioner based on the actual foot temperature and the target foot temperature.

6. A computer-readable storage medium, characterized in that, It stores a program that, when executed by a processor, implements the vehicle outlet air temperature control method according to any one of claims 1-4.

7. A vehicle, characterized in that, The system includes a memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the vehicle outlet air temperature control method according to any one of claims 1-4.

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