Method and equipment for calculating air outlet temperature of automobile air conditioner, vehicle and storage medium

Abstract

The invention discloses a calculation method and device for the air outlet temperature of an automobile air conditioner, a vehicle and a storage medium. The method comprises the steps that the air outlet temperature of an evaporation core body of the automobile air conditioner is obtained; the air outlet temperature of a warm air core body of the automobile air conditioner is obtained; acquiring an air volume ratio, wherein the air volume ratio is a warm air ratio or a cold air ratio; according to the air volume proportion, the air outlet temperature of the evaporation core body and the air outlet temperature of the warm air core body, the air mixing temperature is obtained through calculation; and the air outlet temperature of each air outlet is calculated according to the air mixing temperature, wherein the air outlet temperature is the temperature of the air in the air mixing cavity after flowing through the air outlet channel corresponding to the air outlet. The air outlet temperature can be calculated without arranging a temperature sensor at the air outlet, and the reliability of temperature obtaining is improved while the manufacturing cost of the vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a method, device, vehicle and storage medium for calculating the air outlet temperature of an automobile air conditioner. Background Art

[0002] Automotive air conditioning device, referred to as "automotive air conditioning", is a ventilation device used to adjust and control the temperature, humidity, air cleanliness and air flow in the car compartment to the best state, provide passengers with a comfortable riding environment and reduce travel fatigue; create good working conditions for drivers, and play an important role in ensuring safe driving. With the development of the automobile manufacturing industry, the quality of life of the people has been significantly improved, and consumers' pursuit of automobile comfort has been increasing. Automotive air conditioning has gradually become an indispensable standard configuration on vehicles.

[0003] In the automatic control system of automobile air conditioning, accurate detection of the temperature inside and outside the vehicle and the light intensity plays a vital role. By collecting the above data, the system can perform scientific geothermal load calculations, and then achieve precise control of the outlet air temperature to ensure that the temperature inside the car meets the personalized setting requirements of the driver and passengers. In view of this, in the related technology, the vehicle can be equipped with multiple outlet air temperature sensors at different positions (for example, the position of the air outlet blowing towards the vehicle window (blowing window), the position of the air outlet blowing towards the driver's face (blowing face) and the position of the air outlet blowing towards the driver's feet (blowing feet)) to achieve precise control of the outlet air temperature, giving passengers a more comfortable and intelligent driving experience.

[0004] However, equipping the vehicle with temperature sensors at different air outlet positions will significantly increase the manufacturing cost of the vehicle. At the same time, if the sensor fails, the distortion of its reference temperature will reduce the precision and accuracy of the system, and may even cause the entire system to fail. Summary of the invention

[0005] The present application provides a method for calculating the air outlet temperature of an automobile air conditioner, which can solve the problem in the related art of measuring the temperature of each air outlet by equipping temperature sensors at different air outlet positions, which brings about high manufacturing costs and potential reliability risks.

[0006] On the one hand, an embodiment of the present application provides a method for calculating the air outlet temperature of an automobile air conditioner, comprising:

[0007] Obtaining the outlet air temperature of the evaporation core of the automobile air conditioner, wherein the outlet air temperature of the evaporation core is the temperature of the air entering the automobile air conditioner after flowing through the evaporation core;

[0008] Acquire the outlet air temperature of the heater core of the automobile air conditioner, where the outlet air temperature of the heater core is the temperature of the air flowing out of the evaporator core after passing through the heater core;

[0009] Obtaining an air volume ratio, where the air volume ratio is a warm air ratio or a cold air ratio, where the warm air ratio is used to indicate the ratio of the air volume flowing through the warm air core to the total air intake, and the cold air ratio is used to indicate the ratio of the air volume not passing through the warm air core to the total air intake, where the total air intake is the air intake of the evaporator core;

[0010] The mixed air temperature is calculated according to the air volume ratio, the air outlet temperature of the evaporation core and the air outlet temperature of the heater core, wherein the mixed air temperature is used to indicate the temperature of the air flowing through the evaporation core and the heater core after being mixed in the air mixing chamber of the automobile air conditioner;

[0011] The air outlet temperature of each air outlet is calculated according to the mixed air temperature, and the air outlet temperature is the temperature of the air in the air mixing chamber after flowing through the air outlet duct corresponding to the air outlet.

[0012] In some embodiments, the step of calculating the air outlet temperature of each air outlet according to the mixed air temperature includes:

[0013] Get the air volume of each air outlet;

[0014] The air outlet temperature of each air outlet is calculated according to the temperature inside the vehicle, the mixed air temperature and the air volume of each air outlet.

[0015] In some embodiments, obtaining the air volume of each air outlet includes:

[0016] The air volume of each air outlet is calculated according to the total air inlet volume and the air volume distribution coefficient of each air outlet, and the air volume distribution coefficient is used to indicate the ratio of the air volume allocated to each air outlet to the total air volume.

[0017] In some embodiments, the air outlet temperature of each air outlet is calculated based on the vehicle interior temperature, the mixed air temperature and the air volume of each air outlet, including:

[0018] Calculating the air duct temperature loss of each air outlet according to the vehicle interior temperature, the mixed air temperature and the air volume of each air outlet;

[0019] The air outlet temperature of each air outlet is calculated according to the mixed air temperature and the air duct temperature loss of each air outlet.

[0020] In some embodiments, the calculating the outlet air temperature of each air outlet according to the mixed air temperature and the air duct temperature loss of each air outlet includes:

[0021] For any air outlet, the difference between the mixed air temperature and the air duct temperature loss of the air outlet is calculated to obtain the air outlet temperature of the air outlet.

[0022] In some embodiments, obtaining the air volume ratio includes:

[0023] The warm air ratio is calculated according to the position of the temperature damper and the position of the mode damper.

[0024] In some embodiments, the mixed air temperature is calculated according to the air volume ratio, the air outlet temperature of the evaporator core, and the air outlet temperature of the warm air core, including:

[0025] The cold air proportion is calculated according to the warm air proportion;

[0026] The mixed air temperature is calculated according to the warm air proportion, the outlet air temperature of the warm air core, the cold air proportion and the outlet air temperature of the warm air core.

[0027] In some embodiments, obtaining the air volume ratio includes:

[0028] The cold air proportion is calculated according to the position of the temperature damper and the position of the mode damper.

[0029] In some embodiments, the mixed air temperature is calculated according to the air volume ratio, the air outlet temperature of the evaporator core, and the air outlet temperature of the warm air core, including:

[0030] The warm air proportion is calculated according to the cold air proportion;

[0031] The mixed air temperature is calculated according to the warm air proportion, the outlet air temperature of the warm air core, the cold air proportion and the outlet air temperature of the warm air core.

[0032] In some embodiments, obtaining the air outlet temperature of the evaporation core of the automobile air conditioner includes:

[0033] The air inlet temperature of the evaporation core is calculated according to the position of the circulation air door of the automobile air conditioner, the temperature inside the vehicle and the temperature outside the vehicle;

[0034] The air outlet temperature of the evaporation core of the automobile air conditioner is calculated according to the air inlet temperature of the evaporation core, the surface temperature of the evaporation core and the total air inlet volume.

[0035] In some embodiments, the step of calculating the air inlet temperature of the evaporator core according to the circulating air door position, the temperature inside the vehicle, and the temperature outside the vehicle includes:

[0036] Calculating the outside wind ratio according to the position of the circulating air door, the outside wind ratio is used to indicate the ratio of the air volume entering from outside the vehicle to the total air volume;

[0037] The air inlet temperature of the evaporator core is calculated according to the temperature inside the vehicle, the temperature outside the vehicle and the proportion of the outside wind.

[0038] In some embodiments, the step of calculating the outlet air temperature of the evaporation core of the automobile air conditioner according to the inlet air temperature of the evaporation core, the surface temperature of the evaporation core and the total inlet air volume includes:

[0039] Calculating the temperature difference between the surface temperature of the evaporation core and the air inlet temperature of the evaporation core;

[0040] The front-to-back temperature difference of the evaporation core is calculated according to the temperature difference between the surface temperature of the evaporation core and the air inlet temperature of the evaporation core, and the total air inlet volume, and the front-to-back temperature difference of the evaporation core is used to indicate the temperature change of the air after it flows through the evaporation core;

[0041] The air outlet temperature of the evaporation core is calculated according to the air inlet temperature of the evaporation core and the temperature difference between the front and rear of the evaporation core.

[0042] In some embodiments, obtaining the outlet temperature of the heater core of the automobile air conditioner includes:

[0043] The front-to-back temperature difference of the heater core is calculated according to the outlet air temperature of the evaporator core, the inlet water temperature of the heater core and the inlet air volume of the heater core, and the front-to-back temperature difference of the heater core is used to indicate the temperature change of the air after it flows through the heater core;

[0044] The air outlet temperature of the warm air core is calculated according to the air outlet temperature of the evaporation core and the front-rear temperature difference of the warm air core.

[0045] In some embodiments, the step of calculating the outlet temperature of the warm air core according to the outlet temperature of the evaporator core and the front-rear temperature difference of the warm air core comprises:

[0046] The air outlet temperature of the warm air core before correction is calculated according to the air outlet temperature of the evaporating core and the front and rear temperature difference of the warm air core;

[0047] The air outlet temperature of the heater core before correction is corrected according to the coolant flow of the heater core to obtain the air outlet temperature of the heater core.

[0048] In some embodiments, the front-to-rear temperature difference of the warm air core is calculated according to the outlet air temperature of the evaporator core, the inlet water temperature of the warm air core, and the inlet air volume of the warm air core, including:

[0049] The warm air ratio is calculated according to the position of the temperature damper and the position of the mode damper;

[0050] The air intake volume of the warm air core is calculated according to the total air intake volume and the warm air proportion;

[0051] Calculate the temperature difference between the inlet water temperature of the heater core and the outlet air temperature of the evaporator core;

[0052] The front and rear temperature difference of the heater core is calculated according to the temperature difference between the inlet water temperature of the heater core and the outlet temperature of the evaporation core, and the inlet air volume of the heater core.

[0053] On the other hand, an embodiment of the present application provides a computer device, wherein the battery control system includes a processor and a memory, wherein the memory stores at least one instruction or program, and the instruction or program is loaded and executed by the processor to implement any of the above methods for calculating the air outlet temperature of an automobile air conditioner.

[0054] On the other hand, an embodiment of the present application provides a vehicle, wherein the vehicle is equipped with the computer device as described above.

[0055] On the other hand, an embodiment of the present application provides a computer-readable storage medium, in which at least one instruction is stored, and the instruction is loaded and executed by a processor to implement any of the above methods for calculating the air outlet temperature of an automobile air conditioner.

[0056] The technical solution of this application has at least the following advantages:

[0057] By obtaining the air outlet temperature of the evaporator core and the air outlet temperature of the heater core of the automobile air conditioner, the air volume ratio is obtained, and the mixed air temperature is calculated according to the air volume ratio, the air outlet temperature of the evaporator core and the air outlet temperature of the heater core. The air outlet temperature of each air outlet is calculated according to the mixed air temperature, so that the air outlet temperature can be calculated without setting a temperature sensor at the air outlet, thereby reducing the manufacturing cost of the vehicle and the reliability risk of the air-conditioning control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0059] Figure 1 It is a schematic diagram of the air flow in the air conditioning box of the car air conditioner;

[0060] Figure 2 is a flow chart of a method for calculating the air outlet temperature of an automobile air conditioner provided by an exemplary embodiment of the present application;

[0061] Figure 3 is a flow chart of a method for calculating the air outlet temperature of an evaporation core provided by an exemplary embodiment of the present application;

[0062] Figure 4 It is a schematic diagram of data processing in a method for calculating the air outlet temperature of an evaporating core provided by an exemplary embodiment of the present application;

[0063] Figure 5 is a flow chart of a method for calculating the air outlet temperature of an evaporation core provided by an exemplary embodiment of the present application;

[0064] Figure 6 It is a schematic diagram of data processing in a method for calculating the outlet air temperature of a warm air core provided by an exemplary embodiment of the present application;

[0065] Figure 7 is a flow chart of a method for calculating the air outlet temperature of an automobile air conditioner provided by an exemplary embodiment of the present application;

[0066] Figure 8 It is a schematic diagram of data processing in a method for calculating the air outlet temperature of an automobile air conditioner provided by an exemplary embodiment of the present application;

[0067] Fig. 9 is a block diagram of a computer device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0068] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0069] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0070] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0071] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0072] refer to Figure 1 , which shows a schematic diagram of the air flow in the air conditioning box of a car air conditioner. Figure 1 As shown, an evaporation core 110 and a heating core 120 are provided in the air conditioning box 100. The evaporation core 110 is used to cool the air flowing through it by means of a refrigerant, and the heating core 120 is used to heat the air flowing through it.

[0073] When the air volume is m (total air volume), the temperature is T 0 After the air enters the air conditioning box 100, it first needs to flow through the evaporation core 110. The temperature of the air flowing out of the evaporation core 110 is T 1 (the outlet air temperature of the evaporating core), under the distribution of the temperature damper 131, the air volume is m 1 The air will flow directly into the air mixing chamber 130, with an air volume of m 2 The air will flow through the warm air core 120 and enter the air mixing chamber 130. The temperature of the air flowing out of the warm air core 120 is T 2 (the outlet temperature of the warm air core), the temperature of the air flowing through the warm air core 120 and the air not passing through the warm air core 120 after mixing in the air mixing chamber 130 is T 3 (mixed air temperature), and then the air in the mixed air chamber 130 flows through different air outlets and is blown out from various air outlets. The number and direction of the air outlets can be set according to needs. Figure 1 In the figure, an air duct configuration having a first air outlet 1301, a second air outlet 1302 and a third air outlet 1303 is used as an example for explanation.

[0074] The first air outlet 1301 may be an air outlet blowing toward the vehicle window (window outlet), the second air outlet 1302 may be an air outlet blowing toward the driver's face (face outlet), and the third air outlet 1303 may be an air outlet blowing toward the driver's feet (foot outlet). Each air outlet controls the air volume allocated to each air outlet through its corresponding damper (damper 1321 corresponding to the first air outlet 1301, damper 1322 corresponding to the second air outlet 1302, damper 1323 corresponding to the third air outlet 1303), and the air volume allocated to each air outlet is determined by the air outlet mode. For example, when the air outlet mode is "window blowing mode", the first air outlet 1301 is allocated the highest proportion of air volume; when the air outlet mode is "face blowing mode", the second air outlet 1302 is allocated the highest proportion of air volume; when the air outlet mode is "foot blowing mode", the third air outlet 1303 is allocated the highest proportion of air volume. The proportion of air volume allocated to each air outlet in each air outlet mode can be set according to actual application requirements.

[0075] In the related art, in order to ensure that the automatic control system of the automobile air conditioner can perform scientific heat load calculation and thus realize accurate control of the air outlet temperature, a temperature sensor is provided at each air outlet. For example, Figure 1 As shown, a first temperature sensor 141 may be provided at the first air outlet 1301, a second temperature sensor 142 may be provided at the second air outlet 1302, and a first temperature sensor 143 may be provided at the third air outlet 1303. However, as mentioned above, temperature sensors provided at different air outlet positions will significantly increase the manufacturing cost of the entire vehicle. At the same time, if a sensor fails, the distortion of its reference temperature will reduce the precision and accuracy of the system, and may even cause the entire system to fail. In view of this, an embodiment of the present application provides a method for calculating the air outlet temperature of an automobile air conditioner. It is not necessary to provide sensors at each air outlet. It is only necessary to use the data collected by sensors commonly provided on the vehicle to accurately and precisely calculate the air outlet temperature under different working conditions and different modes.

[0076] refer to Figure 2 , which shows a flow chart of a method for calculating the air outlet temperature of an automobile air conditioner provided by an exemplary embodiment of the present application. The method can be executed by a control device equipped on the vehicle (for example, the control device can be an electronic control unit (ECU)), such as Figure 2 As shown, the method includes:

[0077] Step 201 , obtaining the air outlet temperature of the evaporation core of the automobile air conditioner. The air outlet temperature of the evaporation core is the temperature of the air entering the automobile air conditioner after passing through the evaporation core.

[0078] For example, Figure 1As shown, the air entering the air conditioning box 100 has a volume of m (recorded as the total air volume) and a temperature of T before passing through the evaporation core 110. 0 (denoted as the air inlet temperature of the evaporation core), the temperature of the air after passing through the evaporation core 110 is T 1 (recorded as the outlet air temperature of the evaporating core), and the air volume is m 1 The air (represented as the air volume that has not passed through the warm air core) flows into the air mixing chamber 130, and the air volume is m 2 Air (referred to as the air volume passing through the heater core) flows into the heater core 120 .

[0079] Among them, the air inlet temperature of the evaporator core is T 0 The temperature inside the vehicle can be collected by the temperature sensor (the temperature inside the vehicle T w ); or, considering the interior temperature T w Based on the vehicle external temperature (hereinafter referred to as "vehicle external temperature T o ", which can be obtained from the server through the wireless network, or collected by the temperature sensor outside the vehicle), and the inlet air temperature T of the evaporation core is obtained by fitting based on historical data 0 and the interior temperature T w 、Outside temperature T o The mapping relationship of the interior temperature T w 、Outside temperature T o Substitute this mapping relationship to calculate the air inlet temperature T of the evaporator core 0 ; or, considering the interior temperature T w 、Outside temperature T o Based on the position of the circulation door on the vehicle (which is located at the front end of the evaporation core), the outside wind ratio (which is used to indicate the ratio of the air volume entering from outside the vehicle to the total air volume) is calculated, and the inside temperature T w 、Outside temperature T o The air inlet temperature T of the evaporator core is calculated by the ratio of the outside air 0 .

[0080] In determining the air inlet temperature T of the evaporator core 0 After that, the outlet air temperature T of the evaporation core can be determined. 1 For example, the air inlet temperature T of the evaporator core can be obtained by fitting the historical data. 0 and the outlet air temperature T of the evaporation core 1 The mapping relationship is obtained by taking the inlet air temperature T of the evaporating core into account. 0 Substitute this mapping relationship to calculate the outlet air temperature T of the evaporation core 1 ; or, considering the air inlet temperature T of the evaporator core 0 Based on the introduction of the surface temperature T of the evaporation core eAccording to the historical data, the outlet air temperature T of the evaporation core is obtained by fitting 1 and the air inlet temperature T of the evaporator core 0 , the surface temperature of the evaporation core T e The surface temperature T of the evaporation core is e , the air inlet temperature of the evaporation core T 0 Substitute this mapping relationship to calculate the outlet air temperature T of the evaporation core 1 Or, according to the inlet air temperature T of the evaporating core 0 , the surface temperature of the evaporation core T e The outlet air temperature of the evaporation core of the automobile air conditioner is calculated using the total air intake volume m.

[0081] Step 202 , obtaining the outlet air temperature of the heater core of the automobile air conditioner, where the outlet air temperature of the heater core is the temperature of the air flowing out of the evaporator core after passing through the heater core.

[0082] For example, Figure 1 As shown, after the air flows through the evaporation core 110, its temperature is T 1 , by controlling the temperature damper, the air volume is m 2 The air flows into the heater core 120, and the outlet temperature of the heater core is T 2 According to the outlet air temperature T of the evaporating core 1 For example, the outlet air temperature T of the evaporation core can be obtained by fitting based on historical data. 1 The outlet temperature of the heater core is T 2 The mapping relationship is obtained by calculating the outlet air temperature T of the evaporation core in step 201. 1 Substitute this mapping relationship to calculate the outlet temperature T of the heater core 2 ; or, considering the outlet air temperature T of the evaporating core 1 The inlet water temperature T of the heater core is introduced based on h , Air intake volume of heater core m 2 According to the historical data, the outlet temperature T of the heater core is obtained by fitting 2 The inlet water temperature T of the heater core h , Air intake volume of heater core m 2 The mapping relationship is to set the inlet water temperature T h , Air intake volume of heater core m 2 Substitute this mapping relationship to calculate the outlet air temperature T of the evaporation core 1 ; or, considering the outlet air temperature T of the evaporating core 1 , the inlet water temperature of the heater core T h , Air intake volume of heater core m 2 Coolant flow rate m introduced into the heater corec According to the historical data, the outlet temperature T of the heater core is obtained by fitting 2 The inlet water temperature T of the heater core h , Air intake volume of heater core m 2 , Coolant flow rate of heater core m c The mapping relationship is to set the inlet water temperature T h , Air intake volume of heater core m 2 , Coolant flow rate of heater core m c Substitute this mapping relationship to calculate the outlet temperature T of the heater core 2 .

[0083] Step 203, obtain the air volume ratio, the air volume ratio is the warm air ratio or the cold air ratio, the warm air ratio is used to indicate the ratio of the air volume flowing through the warm air core to the total air intake, and the cold air ratio is used to indicate the ratio of the air volume not passing through the warm air core to the total air intake, and the total air intake is the air intake of the evaporating core.

[0084] For example, the warm air proportion α can be calculated according to the position of the temperature damper and the position of the mode damper. 2 Or, the cold air proportion α can be calculated based on the position of the temperature damper and the position of the mode damper 1 Among them, the position of the mode damper is determined by the air outlet mode.

[0085] Step 204, calculate the mixed air temperature according to the air volume ratio, the air outlet temperature of the evaporator core and the air outlet temperature of the heater core. The mixed air temperature is used to indicate the temperature of the air flowing through the evaporator core and the heater core after mixing in the air mixing chamber of the automobile air conditioner.

[0086] Mixed air temperature T 3 Calculation :

[0087] like Figure 1 As shown, the air entering the air conditioner 100 first flows through the evaporator core 110. Under the distribution of the temperature damper 131, part of it will flow through the warm air core 120, and the other part will flow directly into the air mixing chamber 130. After the temperature damper 131, the air flowing through the warm air core 120 and the air not passing through the warm air core 120 are mixed in the air mixing chamber 130, and then blown out from each air outlet. Based on the law of energy conservation, the mixed air temperature T 3 and the outlet air temperature T of the evaporation core 110 1 , air volume not passing through the heater core m 1 , the outlet temperature of the heater core T 2 and the air volume m that does not pass through the warm air core 2 Satisfy between:

[0088]

[0089] Among them, C p is the specific heat of air at constant pressure (the influence of temperature is ignored in the present embodiment), H 1 is the enthalpy of the air that has not passed through the heater core, H 2 is the enthalpy of the air flowing through the heater core, α 1 is the proportion of cold air, α 2 is the proportion of warm air. From formula (1.1), we can get the influence of mixed air temperature T 3 The factor is the outlet air temperature T of the evaporation core 1 , the outlet temperature of the heater core is T 2 And the proportion of warm air α 2 (or cold air ratio α 1 ), since the outlet air temperature T of the evaporating core has been obtained in the previous step 1 , the outlet temperature of the heater core is T 2 And the air volume ratio, so the mixed air temperature T can be calculated according to formula (1.1): 3 .

[0090] For example, if the air volume ratio is warm air ratio α 2 , then step 204 includes but is not limited to: according to the warm air proportion α 2 Calculate the cold air ratio α 1 ; According to the proportion of warm air α 2 , the outlet temperature of the heater core T 2 、Cold air ratio α 1 and the outlet air temperature T of the evaporation core 1 Calculate the mixed air temperature T 3 .

[0091] For example, 100% minus the warm air ratio α 2 Get the cold air ratio α 1 , the outlet air temperature of the evaporating core is T 1 Multiply by the cold air ratio α 1 , the outlet temperature of the heater core is T 2 Multiply by the warm air ratio α 2 , adding these two products gives the mixed air temperature T 3 .

[0092] If the air volume ratio is the warm air ratio, step 204 includes but is not limited to: calculating the warm air ratio according to the cold air ratio; calculating the mixed air temperature according to the warm air ratio, the outlet air temperature of the warm air core, the cold air ratio and the outlet air temperature of the warm air core. The calculation method can be referred to above and will not be described here.

[0093] Step 205, calculating the outlet air temperature of each outlet according to the mixed air temperature, where the outlet air temperature is the temperature of the air in the mixed air chamber after it flows through the outlet duct corresponding to the outlet.

[0094] For example, the air outlet temperature of each air outlet is related to the air volume of the air outlet and the temperature inside the vehicle T w and mixed air temperature T 3 The outlet temperature and air volume, and the interior temperature T of the vehicle are obtained by fitting the historical data. w , mixed air temperature T 3 The mapping relationship between the air volume at the air outlet and the temperature inside the car T w , mixed air temperature T 3 The mapping relationship is used to calculate the outlet air temperature of the outlet. The air volume of each outlet is related to the total air volume and the outlet mode (which determines the air volume distribution coefficient of each outlet, and the air volume distribution coefficient is used to indicate the ratio of the air volume allocated to each outlet to the total air volume).

[0095] To summarize, in the embodiments of the present application, the air outlet temperature of the evaporator core and the air outlet temperature of the heater core of the automobile air conditioner are obtained, and then the air volume ratio is obtained. The mixed air temperature is calculated according to the air volume ratio, the air outlet temperature of the evaporator core and the air outlet temperature of the heater core. The air outlet temperature of each air outlet is calculated according to the mixed air temperature, so that the air outlet temperature can be calculated without setting a sensor at the air outlet, thereby reducing the manufacturing cost of the vehicle and the reliability risk of the air-conditioning control system.

[0096] Evaporation core air outlet temperature T 1 Calculation :

[0097] like Figure 1 As shown, the evaporator core 110 acts as a heat exchanger to achieve heat exchange between the refrigerant and the air. The control process is to maintain its surface temperature T e Therefore, it can be simplified into a convection heat transfer model of air flowing through a constant temperature solid wall. Its heat transfer satisfies:

[0098] Q evap =h·A e ·(T e -T 0 )=C p ·m·(T 1 -T 0 ) (1.2)

[0099] You can get:

[0100] Among them, C p is the specific heat of air at constant pressure (the influence of temperature is ignored in the present embodiment), Q evap is the total heat transfer of the evaporator core, h is the convection heat transfer coefficient, A eis the heat transfer area of ​​the evaporator core, the convection heat transfer coefficient h depends on the flow rate of the air, which can be regarded as a constant in the embodiment of the present application, and the constant pressure specific heat of air C p and evaporation core heat exchange area A e The industry is a fixed value, thus affecting the outlet air temperature T of the evaporation core. 1 The factor can be regarded as the surface temperature T of the evaporation core e and the air inlet temperature T of the evaporator core 0 Temperature difference △T 1 , and the total air intake volume m. In view of this, the embodiment of the present application provides a method for calculating the outlet air temperature of an evaporation core, which can accurately and precisely calculate the outlet air temperature of an evaporation core.

[0101] refer to Figure 3 , which shows a flow chart of a method for calculating the outlet air temperature of an evaporating core provided by an exemplary embodiment of the present application. The method can be Figure 2 An optional implementation of step 201 in the embodiment is as follows: Figure 3 As shown, the method includes:

[0102] Step 2011, calculating the air inlet temperature of the evaporation core according to the position of the circulation damper of the automobile air conditioner, the temperature inside the vehicle and the temperature outside the vehicle.

[0103] For example, as described above, the outside air ratio can be calculated by the position of the circulating air door on the vehicle, and then according to the vehicle interior temperature T w 、Outside temperature T o The air inlet temperature T of the evaporator core is calculated by the ratio of the outside air 0 Among them, the position of the circulating air door can be obtained by calling local data, and the temperature inside the car T w and the outside temperature T o The method of obtaining can be referred to above and will not be elaborated here.

[0104] For example, a first mapping relationship is stored in the vehicle, which is a mapping relationship between the position of the circulating air door and the proportion of the outside air. The proportion of the outside air can be calculated according to the position of the circulating air door through the first mapping relationship. The proportion of the inside air can be obtained by subtracting the proportion of the outside air from 100% (which is used to indicate the ratio of the air volume in the vehicle to the total air intake volume). The temperature inside the vehicle T w Multiply by the interior wind ratio and convert the outside temperature T o Multiply by the external wind ratio, and add these two products to get the air inlet temperature T of the evaporator core. 0 .

[0105] Step 2012, calculating the outlet air temperature of the evaporation core of the automobile air conditioner according to the inlet air temperature of the evaporation core, the surface temperature of the evaporation core and the total inlet air volume.

[0106] For example, as mentioned above, the outlet air temperature of the evaporating core is T 1 is the air inlet temperature T of the evaporator core 0 , the surface temperature of the evaporation core T e , the total air volume m, which can be calculated by the following method: Calculate the surface temperature T of the evaporating core e and the air inlet temperature T of the evaporator core 0 Temperature difference △T 1 ; According to the temperature difference △T between the surface temperature of the evaporation core and the air inlet temperature of the evaporation core 1 , and the total air volume m to calculate the temperature difference △Q before and after the evaporation core 1 , the temperature difference between the front and rear of the evaporation core △Q 1 It is used to indicate the temperature change after the air flows through the evaporator core (it is the variable on the right side of the equal sign in formula (1.3)); according to the inlet air temperature T of the evaporator core 0 The temperature difference between the front and rear of the evaporation core △Q 1 Calculate the outlet air temperature T of the evaporator core 1 (The air inlet temperature T of the evaporating core 0 The temperature difference between the front and rear of the evaporation core △Q 1 Substitute into formula (1.3) to calculate the outlet temperature T of the evaporator core 1 ). Among them, the surface temperature of the evaporation core is T e It can be obtained by retrieving local data (collected by the evaporation temperature sensor), the total air intake volume m can be obtained according to the actual measurement of the vehicle's air volume test (a fixed value), and the air intake temperature T of the evaporation core 0 The method of obtaining can be referred to above and will not be elaborated here.

[0107] For example, the second mapping relationship is stored in the vehicle, and the second mapping relationship is the front and rear temperature difference ΔQ of the evaporation core. 1 The temperature difference between the surface temperature of the evaporation core and the air inlet temperature of the evaporation core is △T 1 , the total air volume m, and the temperature difference △T between the surface temperature of the evaporation core and the air inlet temperature of the evaporation core is calculated. 1 After that, the temperature difference △T between the surface temperature of the evaporation core and the air inlet temperature of the evaporation core can be calculated. 1 The total air volume m is obtained by querying the second mapping relationship to obtain the front and rear temperature difference △Q of the evaporation core 1 .

[0108] refer to Figure 4 , which shows a schematic diagram of data processing in a method for calculating the outlet temperature of an evaporating core provided by an exemplary embodiment of the present application. The data in the dashed box in the figure are intermediate variables, the data in the thick solid box are input quantities, and the thin solid box are calibration quantities. The symbol indicates data multiplication, The symbol indicates data addition. The symbol represents data subtraction, for example, Figure 4 As shown:

[0109] According to the total air intake volume m and the position of the circulating air door, the first mapping relationship is queried to obtain the outside air ratio, and the inside air ratio is obtained by subtracting the outside air ratio from 100%. 0 Multiply the product of the external wind ratio and the interior temperature T w The product of the internal wind ratio is added to get the air inlet temperature T of the evaporator core. 0 , calculate the surface temperature T of the evaporation core e and the air inlet temperature T of the evaporator core 0 Temperature difference △T 1 , according to the temperature difference △T between the surface temperature of the evaporation core and the air inlet temperature of the evaporation core 1 , and the total air intake volume query the second mapping relationship to obtain the front and rear temperature difference △Q of the evaporation core 1 , the temperature difference between the front and rear of the evaporation core △Q 1 and the air inlet temperature T of the evaporator core 0 Add together to get the outlet air temperature T of the evaporation core 1 .

[0110] Heater core outlet temperature T 2 Calculation :

[0111] like Figure 1 As shown, the function of the heater core 120 is to use the heated coolant to heat the air flowing through the heater core 120. It is a component for forced convection heat exchange between the coolant and the air. Usually, the inlet and outlet of the heater core 120 on the vehicle are not equipped with sensors for temperature measurement, so the two fluid heat exchange models cannot be used to calculate the outlet air temperature. In order to simplify the model, it is assumed that the surface temperature of the heater core 120 is constant and equal to its inlet water temperature. Therefore, the air flow through the constant temperature wall model can be used to calculate its outlet air temperature. Its heat exchange capacity satisfies:

[0112] Q heat =h 1 ·A h ·(T h -T 1 )=C p ·m 2 ·(T 2 -T 1 ) (1.4)

[0113] You can get:

[0114]

[0115] Among them, Q heat is the total heat exchange of the heater core, h1 is the convective heat transfer coefficient, A h is the heat exchange area of ​​the heater core, T h is the surface temperature of the heater core (considered as its inlet water temperature in the present embodiment), and the convection heat transfer coefficient h 1 It depends on the air flow rate, which can be regarded as a constant value in the present embodiment. The constant pressure specific heat C p And the heat exchange area A h is a fixed value. Therefore, it affects the outlet temperature of the heater core T 2 The factor can be regarded as the surface temperature of the heater core (the inlet water temperature of the heater core) T h and the inlet temperature of the heater core (i.e. the outlet temperature of the evaporator core) T 1 Temperature difference △T 2 , and the air volume of the heater core m 2 In view of this, an embodiment of the present application provides a method for calculating the outlet temperature of a heater core, which can accurately and precisely calculate the outlet temperature of the heater core.

[0116] refer to Figure 5 , which shows a flow chart of a method for calculating the outlet air temperature of an evaporating core provided by an exemplary embodiment of the present application. The method can be Figure 2 An optional implementation of step 202 in the embodiment is as follows: Figure 5 As shown, the method includes:

[0117] Step 2021, calculate the front and rear temperature difference of the heater core according to the outlet air temperature of the evaporator core, the inlet water temperature of the heater core and the inlet air volume of the heater core. The front and rear temperature difference of the heater core is used to indicate the temperature change of the air after passing through the heater core.

[0118] Exemplarily, step 2021 includes but is not limited to: calculating the warm air proportion α according to the position of the temperature damper and the position of the mode damper 2 ; According to the total air volume m and the proportion of warm air α 2 Calculate the air volume m of the heater core 2 ; Calculate the inlet water temperature T of the heater core h and the outlet air temperature T of the evaporation core 1 Temperature difference △T 2 ; According to the inlet water temperature T of the heater core h The temperature difference between the air inlet temperature and the evaporation core is △T 2 , and the air volume of the heater core m 2 Calculate the front and rear temperature difference of the heater core △Q 2Among them, the temperature difference between the front and rear of the warm air core is used to indicate the temperature change of the air after it flows through the warm air core (which is the variable on the right side of the equal sign in formula (1.5)). The position of the mode damper is defined by the air outlet mode. Since the relationship between the flow field change inside the air-conditioning box and the position of the temperature damper is not linear, the actual air volume ratio does not completely correspond to the position of the temperature damper. Therefore, in the embodiment of the present application, the warm air ratio calculated based on the position of the temperature damper and the position of the mode damper has higher precision and accuracy.

[0119] For example, a third mapping relationship and a fourth mapping relationship are stored in the vehicle. The third mapping relationship is the front and rear temperature difference ΔQ of the heater core. 2 and the inlet water temperature of the heater core (which can be regarded as its surface temperature) T h The temperature difference between the inlet air temperature and the heater core temperature △T 2 , Air intake volume of heater core m 2 The fourth mapping relationship is the mapping relationship between the warm air ratio and the position of the temperature damper and the position of the mode damper. The warm air ratio α can be obtained by querying the fourth mapping relationship according to the position of the temperature damper and the position of the mode damper. 2 , multiply the total air volume m by the warm air proportion α 2 Get the air volume m of the heater core 2 , calculate the inlet water temperature T of the heater core h and the outlet air temperature T of the evaporation core 1 Temperature difference △T 2 , according to the temperature difference △T between the inlet water temperature of the heater core and the outlet air temperature of the evaporation core 2 , and the air volume of the heater core m 2 The front and rear temperature difference △Q of the heater core is obtained by querying the third mapping relationship 2 .

[0120] Among them, the inlet water temperature of the heater core is T h It can be approximated to the outlet water temperature of the positive temperature coefficient (PTC) heater on the vehicle or the thermostat temperature of the engine. The inlet air temperature of the heater core is equal to the outlet air temperature T of the evaporator core. 1 , air volume of the heater core m 2 The method of obtaining can be referred to above and will not be elaborated here.

[0121] Step 2022, the air outlet temperature of the warm air core is calculated based on the air outlet temperature of the evaporator core and the front and rear temperature difference of the warm air core.

[0122] For example, the temperature difference ΔQ before and after the heater core is calculated 2 After that, the outlet air temperature of the evaporating core is T 1The temperature difference between the front and rear of the heater core △Q 2 Substituting into formula (1.5) we can calculate the outlet temperature T of the heater core: 2 .

[0123] Considering the outlet temperature T of the heater core 2 The calculation method simplifies the influence of the coolant of the heater core on it. In order to calculate the outlet temperature T of the heater core 2 For more precise and accurate calculation, the coolant flow m of the heater core needs to be introduced c It is corrected. In this case, the outlet air temperature T of the warm air core calculated in the above steps is 2 is the outlet temperature of the heater core before correction T 2 In view of this, step 2022 includes but is not limited to: according to the outlet air temperature T of the evaporating core 1 The temperature difference between the front and rear of the heater core △Q 2 Calculate the outlet temperature of the heater core before correction T 2 '; According to the coolant flow m of the heater core c The outlet temperature of the heater core before correction is T 2 'Make corrections to get the outlet temperature T of the heater core 2 .

[0124] For example, the fifth mapping relationship is stored in the vehicle, and the fifth mapping relationship is the correction coefficient and the coolant flow rate m c The mapping relationship between them can be based on the coolant flow m c Query the fifth mapping relationship to obtain the correction coefficient, and multiply the correction coefficient by the outlet air temperature T of the warm air core before correction. 2 'Get the outlet temperature T of the heater core 2 .

[0125] refer to Figure 6 , which shows a schematic diagram of data processing in a method for calculating the outlet temperature of a warm air core provided by an exemplary embodiment of the present application. The data in the dashed box in the figure are intermediate variables, the data in the thick solid box are input quantities, and the thin solid box are calibration quantities. The symbol indicates data multiplication, The symbol indicates data addition. The symbol represents data subtraction, for example, Figure 6 As shown:

[0126] According to the position of the temperature damper and the position of the mode damper, the fourth mapping relationship is queried to obtain the warm air proportion α 2 , multiply the total air volume m by the warm air proportion α 2 Get the air intake volume m of the heater core 2 , calculate the inlet water temperature T of the heater core hand the outlet air temperature T of the evaporation core 1 Temperature difference △T 2 , according to the temperature difference △T between the inlet water temperature of the heater core and the outlet air temperature of the evaporation core 2 , and the air intake volume of the heater core m 2 Query the third mapping relationship to obtain the front and rear temperature difference △Q of the heater core 2 , the outlet air temperature of the evaporating core is T 1 Temperature difference between the front and rear of the heater core △Q 2 Add together to get the outlet temperature T of the heater core before correction 2 ', according to the coolant flow m of the heater core c Query the fifth mapping relationship to obtain the correction coefficient, and convert the outlet air temperature T of the warm air core before correction 2 'Multiply by the correction coefficient to get the outlet temperature T of the heater core 2 .

[0127] Air outlet temperature T 4 Calculation :

[0128] like Figure 1 As shown, the air passing through the evaporation core 110 and the heating core 120 is mixed in the air mixing chamber 130 and flows through different air outlets, and is blown out from the corresponding air outlets (the first air outlet 1301, the second air outlet 1302, and the third air outlet 1303). When the air flows through the air outlet, convection heat exchange occurs, causing temperature loss, which is manifested as the mixed air temperature T 3 With outlet temperature T 4 There is a certain temperature difference between the two. The air outlet of the air conditioner is installed in the cockpit, and the surface temperature of the air outlet can be regarded as the temperature inside the car, T w The temperature loss of the air outlet is:

[0129]

[0130] The calculation results are:

[0131] Among them, Q duct is the outlet duct temperature loss, h 2 is the convective heat transfer coefficient, A d is the heat exchange area of ​​the air duct, and the surface temperature of the air duct can be regarded as the temperature inside the car T w , m duct is the air volume flowing through the outlet duct. Convective heat transfer coefficient h 2 Depends on air velocity, constant pressure specific heat C p And the heat exchange area A d Therefore, the influence on the outlet air temperature T 4 The factor can be regarded as the air volume m at the outlet duct , and the duct surface temperature (in-vehicle temperature) T wand mixed air temperature T 3 Temperature difference △T 3 In view of this, an embodiment of the present application provides a method for calculating the outlet air temperature of an automobile air conditioner, which can accurately and precisely calculate the outlet air temperature.

[0132] refer to Figure 7 , which shows a flow chart of a method for calculating the outlet air temperature of an automobile air conditioner provided by an exemplary embodiment of the present application. The method can be Figure 2 An optional implementation of step 205 in the embodiment is as follows: Figure 7 As shown, the method includes:

[0133] Step 2051, obtaining the air volume of each air outlet.

[0134] Exemplarily, the air volume of each air outlet can be calculated based on the total air inlet volume m and the air volume distribution coefficient of each air outlet. The air volume distribution coefficient is used to indicate the ratio of the air volume allocated to each air outlet to the total air volume. In the following, step 2051 is exemplarily described by assuming that the air conditioner is provided with three air outlets, namely, the first air outlet, the second air outlet and the third air outlet.

[0135] For example, the vehicle stores a sixth mapping relationship, a seventh mapping relationship and an eighth mapping relationship, the sixth mapping relationship is a mapping relationship between the position of the mode damper and the air volume distribution coefficient of the first air outlet (hereinafter referred to as air volume distribution coefficient 1), the seventh mapping relationship is a mapping relationship between the position of the mode damper and the air volume distribution coefficient of the second air outlet (hereinafter referred to as air volume distribution coefficient 2), and the eighth mapping relationship is a mapping relationship between the position of the mode damper and the air volume distribution coefficient of the third air outlet (hereinafter referred to as air volume distribution coefficient 3). The sixth mapping relationship, the seventh mapping relationship and the eighth mapping relationship can be queried according to the position of the mode damper to obtain air volume distribution coefficient 1, air volume distribution coefficient 2 and air volume distribution coefficient 3, and the total air intake volume m is multiplied by the air volume distribution coefficient 1, air volume distribution coefficient 2 and air volume distribution coefficient 3 respectively to obtain the air volume of the first air outlet, the air volume of the second air outlet and the air volume of the third air outlet.

[0136] Step 2052, the air outlet temperature of each air outlet is calculated based on the vehicle interior temperature, the mixed air temperature and the air volume of each air outlet.

[0137] Exemplarily, step 2052 includes but is not limited to: according to the temperature T in the vehicle w , mixed air temperature T 3The air duct temperature loss of each air outlet is calculated based on the air volume of each air outlet; the air outlet temperature of each air outlet is calculated based on the mixed air temperature and the air duct temperature loss of each air outlet. The air duct temperature loss is used to indicate the temperature change of air after it flows through the air outlet. In the following, step 2052 is exemplified by the three air outlets, namely, the first air outlet, the second air outlet and the third air outlet, provided in the air conditioner.

[0138] For example, the vehicle stores a ninth mapping relationship, a tenth mapping relationship, and an eleventh mapping relationship. The ninth mapping relationship is the air duct temperature loss ΔQ of the first air outlet. 3 (1) Temperature difference between the interior temperature and the mixed air temperature △T 3 , the mapping relationship of the air volume of the first air outlet, and the tenth mapping relationship is the air duct temperature loss △Q of the second air outlet 3 (2) Temperature difference between the interior temperature and the mixed air temperature △T 3 , the mapping relationship of the air volume of the second air outlet, and the eleventh mapping relationship is the air duct temperature loss △Q of the third air outlet 3 (3) Temperature difference between the interior temperature and the mixed air temperature △T 3 , the mapping relationship of the air volume of the third air outlet, and the calculated vehicle interior temperature T w and mixed air temperature T 3 Temperature difference △T 3 After that, according to the temperature difference △T between the interior temperature and the mixed air temperature 3 The air volume of the first air outlet is obtained by querying the ninth mapping relationship to obtain the air duct temperature loss △Q of the first air outlet 3 (1) Based on the temperature difference △T between the interior temperature and the mixed air temperature 3 The air volume of the second air outlet is obtained by querying the tenth mapping relationship to obtain the air duct temperature loss △Q of the second air outlet 3 (2) Based on the temperature difference △T between the interior temperature and the mixed air temperature 3 The air volume of the third air outlet is obtained by querying the eleventh mapping relationship to obtain the air duct temperature loss △Q of the first air outlet 3 (3), calculate the mixed air temperature T 3 And the air duct temperature loss of the first air outlet △Q 3 The difference between (1) and the outlet temperature T of the first outlet is obtained. 4 (1), calculate the mixed air temperature T 3 And the air duct temperature loss of the second air outlet △Q 3 The difference between (2) and the outlet temperature T of the second outlet is obtained. 4 (2) Calculate the mixed air temperature T 3 And the air duct temperature loss of the third air outlet △Q 3 The difference between (3) and the outlet temperature T of the third outlet is obtained. 4 (3).

[0139] refer to Figure 8 , which shows a schematic diagram of data processing in a method for calculating the outlet temperature of an automobile air conditioner provided by an exemplary embodiment of the present application. In the figure, the data in the dashed box are intermediate variables, the data in the thick solid box are input quantities, the thin solid box are calibration quantities, and the data in the gray box are output quantities. The symbol indicates data multiplication, The symbol indicates data addition. The symbol represents data subtraction, for example, Figure 8 As shown:

[0140] According to the position of the temperature damper and the position of the mode damper, the fourth mapping relationship is queried to obtain the warm air proportion α 2 , subtract the warm air ratio α from 100% 2 Get the cold air ratio α 1 , the outlet temperature of the heater core is T 2 Multiply by the warm air ratio α 2 The product of the temperature T of the evaporator core 1 Multiply by the product of the cold air ratio α 1 Add together to get the mixed air temperature T 3 .

[0141] Calculate the mixed air temperature T 3 and the interior temperature T w Temperature difference △T 3 , query the sixth mapping relationship according to the position of the mode air door to obtain the air volume distribution coefficient 1, query the seventh mapping relationship according to the position of the mode air door to obtain the air volume distribution coefficient 2, query the eighth mapping relationship according to the position of the mode air door to obtain the air volume distribution coefficient 3, multiply the total air intake volume m by the air volume distribution coefficient 1 to obtain the air volume of the first air outlet, multiply the total air intake volume m by the air volume distribution coefficient 2 to obtain the air volume of the second air outlet, multiply the total air intake volume m by the air volume distribution coefficient 3 to obtain the air volume of the third air outlet, and according to the temperature difference △T between the vehicle interior temperature and the mixed air temperature 3 And the air volume of the first air outlet is queried in the ninth mapping relationship to obtain the air duct temperature loss △Q of the first air outlet 3 (1) Based on the temperature difference △T between the interior temperature and the mixed air temperature 3 And the air volume of the second air outlet is queried in the ninth mapping relationship to obtain the air duct temperature loss △Q of the second air outlet 3 (2) Based on the temperature difference △T between the interior temperature and the mixed air temperature 3 And the air volume of the third air outlet is queried in the ninth mapping relationship to obtain the air duct temperature loss △Q of the third air outlet 3 (3), calculate the mixed air temperature T 3 And the air duct temperature loss of the first air outlet △Q 3 The difference between (1) and the outlet temperature T of the first outlet is obtained. 4(1), calculate the mixed air temperature T 3 And the air duct temperature loss of the second air outlet △Q 3 The difference between (2) and the outlet temperature T of the second outlet is obtained. 4 (2) Calculate the mixed air temperature T 3 And the air duct temperature loss of the third air outlet △Q 3 The difference between (3) and the outlet temperature T of the third outlet is obtained. 4 (3).

[0142] refer to Fig. 9 , which shows a block diagram of a computer device provided by an exemplary embodiment of the present application, and the computer device may be the control device provided in the above embodiment. Fig. 9 As shown, the computer device includes: a processor 910 and a memory 920 .

[0143] The processor 910 may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP. The processor 910 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0144] The memory 920 is connected to the processor 910 via a bus or other means, and at least one instruction, at least one program, code set or instruction set is stored in the memory 920. The at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor 910 to implement the calculation method of the automobile air conditioning outlet temperature provided in any of the above embodiments. The memory 920 can be a volatile memory (volatile memory), a non-volatile memory (non-volatile memory) or a combination thereof. The volatile memory can be a random access memory (random-access memory, RAM), such as a static random access memory (static random access memory, SRAM), a dynamic random access memory (dynamic random access memory, DRAM). The non-volatile memory can be a read-only memory (readonly memory image, ROM), such as a programmable read only memory (programmable read only memory, PROM), an erasable programmable read only memory (erasable programmable read only memory, EPROM), and an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM). The non-volatile memory may also be a flash memory, a magnetic memory such as a magnetic tape, a floppy disk, or a hard disk. The non-volatile memory may also be an optical disk.

[0145] The present application also provides a vehicle equipped with Fig. 9 Computer equipment shown.

[0146] The present application also provides a computer-readable storage medium, which stores at least one instruction, at least one program, a code set or an instruction set. The at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the method for calculating the automobile air outlet temperature as described in any of the above embodiments.

[0147] The present application also provides a computer program product. When the computer program product is run on a computer, the computer is enabled to execute the method for calculating the automobile air outlet temperature provided by the above-mentioned various method embodiments.

[0148] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection created by this application.

Claims

1. A method for calculating the air outlet temperature of an automobile air conditioner, characterized in that: include: Obtaining the outlet air temperature of the evaporation core of the automobile air conditioner, wherein the outlet air temperature of the evaporation core is the temperature of the air entering the automobile air conditioner after flowing through the evaporation core; Acquire the outlet air temperature of the heater core of the automobile air conditioner, where the outlet air temperature of the heater core is the temperature of the air flowing out of the evaporator core after passing through the heater core; Obtaining an air volume ratio, where the air volume ratio is a warm air ratio or a cold air ratio, where the warm air ratio is used to indicate the ratio of the air volume flowing through the warm air core to the total air intake, and the cold air ratio is used to indicate the ratio of the air volume not passing through the warm air core to the total air intake, where the total air intake is the air intake of the evaporator core; The mixed air temperature is calculated according to the air volume ratio, the air outlet temperature of the evaporation core and the air outlet temperature of the heater core, wherein the mixed air temperature is used to indicate the temperature of the air flowing through the evaporation core and the heater core after being mixed in the air mixing chamber of the automobile air conditioner; The air outlet temperature of each air outlet is calculated according to the mixed air temperature, and the air outlet temperature is the temperature of the air in the air mixing chamber after flowing through the air outlet duct corresponding to the air outlet.

2. The method according to claim 1, characterized in that: The step of calculating the air outlet temperature of each air outlet according to the mixed air temperature includes: Get the air volume of each air outlet; The air outlet temperature of each air outlet is calculated according to the temperature inside the vehicle, the mixed air temperature and the air volume of each air outlet.

3. The method according to claim 2, characterized in that The obtaining of the air volume of each air outlet includes: The air volume of each air outlet is calculated according to the total air inlet volume and the air volume distribution coefficient of each air outlet, and the air volume distribution coefficient is used to indicate the ratio of the air volume allocated to each air outlet to the total air volume.

4. The method according to claim 3, characterized in that The step of calculating the air outlet temperature of each air outlet according to the vehicle interior temperature, the mixed air temperature and the air volume of each air outlet comprises: Calculating the air duct temperature loss of each air outlet according to the vehicle interior temperature, the mixed air temperature and the air volume of each air outlet; The air outlet temperature of each air outlet is calculated according to the mixed air temperature and the air duct temperature loss of each air outlet.

5. The method according to claim 4, characterized in that The step of calculating the air outlet temperature of each air outlet according to the mixed air temperature and the air duct temperature loss of each air outlet comprises: For any air outlet, the difference between the mixed air temperature and the air duct temperature loss of the air outlet is calculated to obtain the air outlet temperature of the air outlet.

6. The method according to claim 1, characterized in that The obtaining of the air volume ratio includes: The warm air ratio is calculated according to the position of the temperature damper and the position of the mode damper.

7. The method according to claim 6, characterized in that The mixed air temperature is calculated according to the air volume ratio, the air outlet temperature of the evaporation core, and the air outlet temperature of the warm air core, including: The cold air proportion is calculated according to the warm air proportion; The mixed air temperature is calculated according to the warm air proportion, the outlet air temperature of the warm air core, the cold air proportion and the outlet air temperature of the warm air core.

8. The method according to claim 1, characterized in that The obtaining of the air volume ratio includes: The cold air ratio is calculated according to the position of the temperature damper and the position of the mode damper.

9. The method according to claim 8, characterized in that The mixed air temperature is calculated according to the air volume ratio, the air outlet temperature of the evaporation core, and the air outlet temperature of the warm air core, including: The warm air proportion is calculated according to the cold air proportion; The mixed air temperature is calculated according to the warm air proportion, the outlet air temperature of the warm air core, the cold air proportion and the outlet air temperature of the warm air core.

10. The method according to any one of claims 1 to 9, characterized in that: The step of obtaining the air outlet temperature of the evaporation core of the automobile air conditioner comprises: The air inlet temperature of the evaporation core is calculated according to the position of the circulation air door of the automobile air conditioner, the temperature inside the vehicle and the temperature outside the vehicle; The air outlet temperature of the evaporation core of the automobile air conditioner is calculated according to the air inlet temperature of the evaporation core, the surface temperature of the evaporation core and the total air inlet volume.

11. The method according to claim 10, characterized in that The step of calculating the air inlet temperature of the evaporation core according to the circulating air door position of the automobile air conditioner, the temperature inside the vehicle and the temperature outside the vehicle comprises: Calculating the outside wind ratio according to the position of the circulating air door, the outside wind ratio is used to indicate the ratio of the air volume entering from outside the vehicle to the total air volume; The air inlet temperature of the evaporator core is calculated according to the temperature inside the vehicle, the temperature outside the vehicle and the proportion of the outside wind.

12. The method according to claim 11, characterized in that The method of calculating the air outlet temperature of the evaporation core of the automobile air conditioner according to the air inlet temperature of the evaporation core, the surface temperature of the evaporation core and the total air inlet volume comprises: Calculating the temperature difference between the surface temperature of the evaporation core and the air inlet temperature of the evaporation core; The front-to-back temperature difference of the evaporation core is calculated according to the temperature difference between the surface temperature of the evaporation core and the air inlet temperature of the evaporation core, and the total air inlet volume, and the front-to-back temperature difference of the evaporation core is used to indicate the temperature change of the air after it flows through the evaporation core; The air outlet temperature of the evaporation core is calculated according to the air inlet temperature of the evaporation core and the temperature difference between the front and rear of the evaporation core.

13. The method according to any one of claims 1 to 9, characterized in that: The step of obtaining the air outlet temperature of the heating core of the automobile air conditioner comprises: The front-to-back temperature difference of the heater core is calculated according to the outlet temperature of the evaporator core, the inlet water temperature of the heater core and the inlet air volume of the heater core, and the front-to-back temperature difference of the heater core is used to indicate the temperature change of the air after it flows through the heater core; The air outlet temperature of the warm air core is calculated according to the air outlet temperature of the evaporation core and the front-rear temperature difference of the warm air core.

14. The method according to claim 13, characterized in that The step of calculating the outlet temperature of the warm air core according to the outlet temperature of the evaporating core and the front-rear temperature difference of the warm air core comprises: The air outlet temperature of the warm air core before correction is calculated according to the air outlet temperature of the evaporating core and the front and rear temperature difference of the warm air core; The air outlet temperature of the heater core before correction is corrected according to the coolant flow of the heater core to obtain the air outlet temperature of the heater core.

15. The method according to claim 14, characterized in that The temperature difference between the front and rear of the warm air core is calculated according to the outlet air temperature of the evaporating core, the inlet water temperature of the warm air core and the inlet air volume of the warm air core, including: The warm air ratio is calculated according to the position of the temperature damper and the position of the mode damper; The air intake volume of the warm air core is calculated according to the total air intake volume and the warm air proportion; Calculate the temperature difference between the inlet water temperature of the heater core and the outlet air temperature of the evaporator core; The front and rear temperature difference of the heater core is calculated according to the temperature difference between the inlet water temperature of the heater core and the outlet temperature of the evaporation core, and the inlet air volume of the heater core.

16. A computer device, characterized in that: The battery control system includes a processor and a memory, wherein the memory stores at least one instruction or program, and the instruction or program is loaded and executed by the processor to implement the method for calculating the automobile air outlet temperature as described in any one of claims 1 to 15.

17. A vehicle, characterized in that: The vehicle is equipped with the computer device according to claim 16.

18. A computer-readable storage medium, characterized in that: The storage medium stores at least one instruction, which is loaded and executed by the processor to implement the method for calculating the air outlet temperature of the automobile air conditioner as described in any one of claims 1 to 15.

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