CN-121973590-A - Air volume control method and device of vehicle air conditioning system and vehicle

Abstract

The embodiment of the invention relates to the technical field of vehicles, and discloses an air quantity control method and device of a vehicle air conditioning system and a vehicle, wherein the method comprises the steps of obtaining target air quantity of each partition air channel; the method comprises the steps of determining outlet pressure of a blower and target air door opening of each partition air channel according to a preset mapping relation and target air quantity of each partition air channel, wherein the preset mapping relation is used for representing corresponding relation among pressure, air quantity and air door opening, determining target rotating speed of the blower according to the outlet pressure of the blower, the target air quantity of each partition air channel and a preset blower characteristic curve, wherein the preset blower characteristic curve is used for representing corresponding relation among rotating speed, pressure difference and total air quantity, and controlling the blower and the air doors according to the target rotating speed and the target air door opening so that the partition air channels output target air quantity. By applying the technical scheme of the invention, the problem of low air quantity control precision of the air conditioner partition in the prior art can be solved.

Inventors

• LIU GUOPENG
• ZHOU SHUNLI
• NIU MUYUAN

Assignees

• 阿维塔科技(重庆)股份有限公司

Dates

Publication Date

20260505

Application Date

20260112

Claims (10)

1. 1. A method of controlling the air volume of an air conditioning system for a vehicle, the air conditioning system comprising a blower and a plurality of zoned air ducts, each of the zoned air ducts including at least one damper, the method comprising: Obtaining the target air quantity of each partition air channel; determining the outlet pressure of the blower and the target air door opening of each partitioned air duct according to a preset mapping relation and the target air volume of the partitioned air duct, wherein the preset mapping relation is used for representing the corresponding relation among the pressure, the air volume and the air door opening; determining a target rotating speed of the air blower according to the outlet pressure of the air blower, the target air volume of each partition air duct and a preset fan characteristic curve, wherein the preset fan characteristic curve is used for representing the corresponding relation among the rotating speed, the pressure difference and the total air volume; And controlling the blower and the air door according to the target rotating speed and the target air door opening degree so that the partition air channel outputs target air quantity.
2. 2. The method of claim 1, wherein determining the outlet pressure of the blower according to the preset mapping relationship and the target air volume of the partitioned air duct comprises: determining the inlet pressure of each partition air channel according to the preset mapping relation and the target air quantity of the partition air channel; And taking the maximum value of the inlet pressure of the partitioned air duct as the outlet pressure of the blower.
3. 3. The method according to claim 2, wherein determining the inlet pressure of the partitioned air duct according to the preset mapping relationship and the target air volume of the partitioned air duct includes: Acquiring a blowing mode of the partitioned air duct; determining a resistance coefficient of an air door in the blowing mode, and determining a first air outlet area corresponding to the maximum air door opening of the partitioned air duct in the blowing mode; and determining the inlet pressure of the partitioned air duct according to the air door resistance coefficient, the target air volume of the partitioned air duct, the first air outlet area and the preset mapping relation, wherein the preset mapping relation is used for representing the corresponding relation among the air volume, the air outlet area, the air door resistance coefficient and the pressure.
4. 4. The method of claim 3, wherein determining a target damper opening for each of the zoned ducts comprises: determining a second air outlet area according to the target air volume of the partitioned air duct, the outlet pressure of the blower, the air door resistance coefficient and the preset mapping relation; and taking the air door opening corresponding to the second air outlet area as the target air door opening of the partitioned air duct.
5. 5. The method of any one of claims 1-4, wherein determining the target rotational speed of the blower based on the outlet pressure of the blower, the target air volume for each of the partitioned air ducts, and a preset blower characteristic curve comprises: acquiring a circulation state of the air conditioning system; determining total air quantity based on the target air quantity of each partition air channel; and determining the target rotating speed according to the outlet pressure of the blower, the total air quantity, the circulation state and the preset blower characteristic curve.
6. 6. The method of claim 5, wherein the cycling state is an internal cycling state, the preset fan characteristic comprises a first sub-fan characteristic, the first sub-fan characteristic is used for representing a corresponding relation among a rotating speed, a pressure difference and an air quantity during internal cycling, and the determining the target rotating speed according to the outlet pressure of the blower, the total air quantity, the cycling state and the preset fan characteristic comprises: obtaining the atmospheric pressure in the vehicle; Determining a first target pressure differential based on the atmospheric pressure and an outlet pressure of the blower; and determining the target rotating speed based on the total air quantity, the first target pressure difference and the first sub-fan characteristic curve.
7. 7. The method of claim 6, wherein the cycling state is an outer cycling state, the preset fan characteristic comprises a second sub-fan characteristic, the second sub-fan characteristic is used for representing a corresponding relation among a rotating speed, a pressure difference and an air quantity during outer cycling, and the determining the target rotating speed according to the outlet pressure of the blower, the total air quantity, the cycling state and the preset fan characteristic comprises: Acquiring the current speed of a vehicle, the inlet pressure of a current blower and the current ambient temperature; Determining a density correction factor at an inlet pressure of the blower and the current ambient temperature; Determining a second target pressure differential based on the density correction factor, an inlet pressure of the blower, and an outlet pressure of the blower; and determining the target rotating speed based on the total air quantity, the second target pressure difference and the second sub-fan characteristic curve.
8. 8. The method of claim 7, wherein the circulation state is a mixed circulation state, and wherein determining the target rotational speed based on the outlet pressure of the blower, the total air volume, the circulation state, and the preset blower characteristic curve comprises: acquiring the mixing circulation proportion of the air conditioning system; Determining the rotating speed of the blower during internal circulation and the rotating speed of the blower during external circulation according to the outlet pressure of the blower, the total air quantity and the preset blower characteristic curve; and based on the mixing proportion, carrying out weighted summation on the rotating speed of the air blower during the internal circulation and the rotating speed of the air blower during the external circulation to obtain the target rotating speed.
9. 9. An air volume control device for a vehicle air conditioning system, the air conditioning system comprising a blower and a plurality of zoned air ducts, each of the zoned air ducts comprising at least one damper, the device comprising: the acquisition module is used for acquiring the target air quantity of each partition air channel; the first determining module is used for determining the outlet pressure of the blower and the target air door opening of each partitioned air duct according to a preset mapping relation and the target air volume of the partitioned air duct, wherein the preset mapping relation is used for representing the corresponding relation among the pressure, the air volume and the air door opening; The second determining module is used for determining the target rotating speed of the blower according to the outlet pressure of the blower, the target air volume of each partition air channel and a preset blower characteristic curve, wherein the preset blower characteristic curve is used for representing the corresponding relation among the rotating speed, the pressure difference and the total air volume; And the control module is used for controlling the blower and the air door according to the target rotating speed and the target air door opening degree so that the partition air channel outputs target air quantity.
10. 10. A vehicle comprising an air conditioning system and a controller, the air conditioning system comprising a blower and a plurality of zoned air ducts, each of the zoned air ducts comprising at least one damper; The controller is configured to perform the operation of the air volume control method of the vehicle air conditioning system according to any one of claims 1 to 8.

Description

Air volume control method and device of vehicle air conditioning system and vehicle Technical Field The embodiment of the invention relates to the technical field of vehicles, in particular to an air quantity control method and device of a vehicle air conditioning system and a vehicle. Background With the development of the intellectualization and the function diversification of automobiles, the multi-zone air conditioner is widely applied to the vehicles. The multi-zone air conditioner breaks the limitation of the same temperature and the same quantity of the whole vehicle, enables different zones in the cabin to realize personalized regulation of temperature and air quantity, and improves cabin comfort and user experience At present, in the development stage, a parameter table for calibrating control parameters of an air conditioning system corresponding to different working conditions is tested, and when the air conditioning system is in actual use, the control parameters of the current air conditioning system are determined by inquiring the parameter table based on the air volume requirement of a user so as to realize the air volume control of air channels in different partitions. However, the method is based on parameter control performed on a lookup table calibrated by full-condition test, and the full-condition test cannot exhaust all dynamic variables in a real vehicle, so that the control parameters are disjointed with the air quantity requirement of a user. Disclosure of Invention In view of the above problems, embodiments of the present invention provide a method and an apparatus for controlling air volume of a vehicle air conditioning system, and a vehicle, which are used for solving the problem in the prior art that the accuracy of controlling air volume of an air conditioner partition is low. According to an aspect of an embodiment of the present invention, there is provided an air volume control method of a vehicle air conditioning system including a blower and a plurality of partitioned air ducts, each of the partitioned air ducts including at least one damper, the method including: Obtaining the target air quantity of each partition air channel; determining the outlet pressure of the blower and the target air door opening of each partitioned air duct according to a preset mapping relation and the target air volume of the partitioned air duct, wherein the preset mapping relation is used for representing the corresponding relation among the pressure, the air volume and the air door opening; determining a target rotating speed of the air blower according to the outlet pressure of the air blower, the target air volume of each partition air duct and a preset fan characteristic curve, wherein the preset fan characteristic curve is used for representing the corresponding relation among the rotating speed, the pressure difference and the total air volume; And controlling the blower and the air door according to the target rotating speed and the target air door opening degree so that the partition air channel outputs target air quantity. According to another aspect of the embodiment of the present invention, there is provided an air volume control device of a vehicle air conditioning system including a blower and a plurality of partitioned air ducts, each of the partitioned air ducts including at least one damper, including: the acquisition module is used for acquiring the target air quantity of each partition air channel; the first determining module is used for determining the outlet pressure of the blower and the target air door opening of each partitioned air duct according to a preset mapping relation and the target air volume of the partitioned air duct, wherein the preset mapping relation is used for representing the corresponding relation among the pressure, the air volume and the air door opening; The second determining module is used for determining the target rotating speed of the blower according to the outlet pressure of the blower, the target air volume of each partition air channel and a preset blower characteristic curve, wherein the preset blower characteristic curve is used for representing the corresponding relation among the rotating speed, the pressure difference and the total air volume; And the control module is used for controlling the blower and the air door according to the target rotating speed and the target air door opening degree so that the partition air channel outputs target air quantity. According to another aspect of an embodiment of the present invention, there is provided an electronic device including a processor, a memory, a communication interface, and a communication bus, the processor, the memory, and the communication interface completing communication with each other through the communication bus; the memory is used for storing at least one executable instruction, and the executable instruction enables the processor to execute the operation of the air quan