CN103692881A - Method for controlling mixed air temperature of vehicle air conditioner - Google Patents
Method for controlling mixed air temperature of vehicle air conditioner Download PDFInfo
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- CN103692881A CN103692881A CN201310499811.6A CN201310499811A CN103692881A CN 103692881 A CN103692881 A CN 103692881A CN 201310499811 A CN201310499811 A CN 201310499811A CN 103692881 A CN103692881 A CN 103692881A
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Abstract
The invention discloses a method for controlling the mixed air temperature of a vehicle air conditioner. The method comprises the following steps: at least determining target outlet air temperature according to vehicle interior temperature and vehicle exterior temperature, which are set by a user and are acquired by a temperature acquisition module; calculating the mixed proportion of cold air and hot air according to the target outlet air temperature; acquiring a pre-control position of a mixed air gate according to a corresponding relation table of the mixed outlet air proportion of the cold air and the hot air and the position of the mixed air gate, wherein the corresponding relation table is stored according to a storage module. Through the method, the pre-control position of the mixed air gate is calculated according to an accurate calculation formula, so that the automatic temperature control of the air conditioner is more accurate; meanwhile, by the full consideration of a value of influence on the outlet air temperature caused by the temperature of an evaporator, the motor position of the mixed air gate is more accurately controlled, so that the aim of regulating the vehicle interior temperature quickly, accurately and stably is achieved, and the comfort of an air conditioning system is improved.
Description
Technical field
The present invention relates to air conditioning for automobiles control technology field, in particular, the invention relates to the mixed air temperature control method of a kind of on-board air conditioner of improving automobile environment inside car.
Background technology
Along with the develop rapidly of vehicle electronics electrical apparatus technology, air conditioning for automobiles has become the indispensable important accessory of automobile, and it is also the factor that needs car production producer emphasis to consider that comfortable driving and the environment of riding are provided.
Yet existing air conditioning for automobiles is manually to control mostly, automobile manual air-conditioning does not have control logic, in order to guarantee to there is constant comfort temperature in car, along with the variation of car external environment in driving process, the hysteresis of the variation of a/c system operation conditions and user sensation, just need constantly vehicles air-conditioner controller of chaufeur, Self-operating air-conditioning, frequent change arrange, cause air-conditioner air outlet temperature to change sometimes hot and sometimes coldly, cause the fluctuation of vehicle interior temperature, affected the comfort of user in car.And this operates frequently and must bring great potential safety hazard to steering vehicle, serious threat driver and crew's personal safety.
At present, along with the development of auto trade with to the improving constantly of comfort requirement in car, increasing automatic air-conditioning system replaces manual air conditioning system to be applied on automobile.Application number is that 201210503030.5 Chinese invention patent application has disclosed a kind of automobile air conditioner air outlet temperature-controlled process and comprises step: at least according to user, arrange and car internal and external temperature is determined a target leaving air temp; According to described target leaving air temp, evaporator temperature and cooling-liquid temperature, calculate the first temperature damper position; According to described target leaving air temp and actual leaving air temp, calculate the second temperature damper position; According to the first damper positions and the second temperature damper location positioning temperature damper position; And the temperature damper that utilizes described temperature damper position control air conditioning for automobiles.Above-mentioned control method is by the algorithm that reads in multiple sensors signal and design, thereby and by certain control policy calculate control information pass to the actuating units such as blender door motor, blowing engine, pattern motor, circulation motor make their work, thereby control the temperature damper of air conditioning for automobiles, yet, in above-mentioned control method, its leaving air temp is to obtain from the temperature sensor that is arranged on the air outlet pipeline the inside of air-conditioning box, because the temperature hysteresis of sensor is brought the sometimes hot and sometimes cold variation of air outlet, cause user's traveling comfort to decline to a great extent; And said method, owing to not considering to start the impact on leaving air temp such as rotating speed, different air-out modes, causes mixing the variation of following environment and user's setting in dynamic process that air temperature control can not be quick, accurate, stable.
Summary of the invention
The object of the invention is to overcome weak point of the prior art, a kind of accurate control blender door position is provided, thereby fast, accurately, stably regulate the mixed air temperature control method of on-board air conditioner of vehicle interior temperature.
The object of the invention is to be achieved through the following technical solutions:
A kind of on-board air conditioner mixes air temperature control method, air-conditioner controller receives the outer temperature of vehicle interior temperature, car, evaporator temperature, the engine cooling water temperature gathering from temperature collect module, described air-conditioner controller is also provided with the memory module that stores the mixed wind air-out ratio of cold and hot air and the mapping table of blender door position, and described control method comprises:
Step 1, at least according to user, arrange and the car internal and external temperature of temperature collect module collection is determined a target leaving air temp;
Step 2, calculates the blending ratio of cold-hot wind according to target leaving air temp, its computing formula is as follows:
reheat[%]=（Tds-Te）/Tmax，
Wherein, reheat[%] be the mixed wind air-out ratio of cold and hot air,
Tds is target leaving air temp,
Tmax is the maximum available leaving air temp of air-conditioning box,
Te is the influence value to leaving air temp of different evaporator temperature;
Step 3, the pre-control position that the mixed wind air-out ratio of cold and hot air of storing according to memory module and the mapping table of blender door position obtain blender door.
Concrete, the computing formula of the maximum leaving air temp Tmax of described air-conditioning box is:
Tmax=(Teng-Teva)×μ+Teva，
Wherein: Tmax is the maximum leaving air temp of air-conditioning box;
Teng is engine cooling water temperature;
μ is the dynamic test that automobile calibrates;
Teva is evaporator temperature.
Concrete, described different evaporator temperature to the computing formula of the influence value of leaving air temp is:
Te=(100–R1)×0.01×Teva,
Wherein: Te is the influence value to leaving air temp of different evaporator temperature;
R1 is operator's compartment blender door percentum.
Described as a modification of the present invention, described air-conditioner controller is also provided with PID controller, after obtaining the pre-control position of blender door described in step 3, enters following operation:
Step 4, goes out the actual leaving air temp in air-conditioning box according near the temperature computation air outlet of different air-out modes and temperature collect module collection;
Step 5, the input using the heal differential of target leaving air temp and actual leaving air temp as PID controller, this PID controller carries out ratio (P), integration (I) and differential (D) to the heal differential of input and calculates, and finally draws controlling quantity;
Step 6, is added by described controlling quantity and the pre-control position of the blender door calculating the control position that is blender door.
Because the control position of blender door is relevant with air-out mode, the present invention calculates actual leaving air temp according to air-out mode and vehicle interior temperature sensor reading, input using the difference of target leaving air temp and actual leaving air temp as PID controller, the output of PID controller and the pre-control position phase adduction of blender door are calculated to the final control position of blender door with this, improve the accuracy that mixed air temperature is controlled.
As another improvement of the present invention, described method also comprises:
The shake of blender door is processed to reduce in control position to the blender door of air-conditioner controller output do filtering.
Concrete, described filtering is processed and is specially: the filtering of first-order filtering algorithm is carried out in the position to the blender door of air-conditioner controller output.Owing to having carried out filtering processing, the position output valve of this blender door is weighted for this sampled value and last filtered output valve, suitably adjust filtering factor and just can take into account the requirement of sensitivity and smoothness, blender door position can not be suddenlyd change but does to change slowly, to improve the comfort level of human body.
As another kind of improvement of the present invention, described method also comprises:
Sluggishness is carried out in filtered blender door control position to be processed.
Concrete, described sluggish being specially of processing: blender door motor position changes while being less than a threshold value, and motor position does not change.
The present invention has the following advantages and beneficial effect compared to existing technology:
1, the present invention calculates the pre-control position of blender door according to accurate computing formula, makes air-conditioning temperature automatically controlled more accurate; By evaporator temperature the influence value of leaving air temp etc. is taken into full account, make blender door motor position control more accurately simultaneously, to reach fast, accurately, stably to regulate the object of vehicle interior temperature, improve the traveling comfort of a/c system.
2, adopt control method of the present invention, by the method for calculating, calculate the maximum leaving air temp at thermonuclear place (being air-conditioning box) and calculate air temperature with this, need at thermonuclear place, not increase temperature sensor, low to the hardware requirement of air-conditioning self, thereby saved, make car cost.
3, according to engine cooling water temperature, dynamic test and evaporator temperature, calculate the maximum leaving air temp of air-conditioning box, make blender door motor position control more accurately.
4, the filtering of first-order filtering algorithm is carried out in the control position of the blender door of air-conditioner controller output, the fluctuation of the control to motor that filtering can avoid control accuracy and data acquisition error to cause, also do sluggish processing simultaneously, prevent the phenomenon of motor vibrating, can make the transition smoothly of blender door position, increase control accuracy, increase electrical machinery life, reduce noise.
The specific embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
This enforcement provides a kind of on-board air conditioner to mix air temperature control method, air-conditioner controller receives the outer temperature of vehicle interior temperature, car, evaporator temperature, the engine cooling water temperature gathering from temperature collect module, described air-conditioner controller is also provided with the memory module that stores the mixed wind air-out ratio of cold and hot air and the mapping table of blender door position, and described control method comprises:
Step 1, at least according to user, arrange and the car internal and external temperature of temperature collect module collection is determined a target leaving air temp;
Step 2, calculates the blending ratio of cold-hot wind according to target leaving air temp, its computing formula is as follows:
reheat[%]=（Tds-Te）/Tmax，
Wherein, reheat[%] be the mixed wind air-out ratio of cold and hot air,
Tds is target leaving air temp,
Tmax is the maximum available leaving air temp of air-conditioning box,
Te is the influence value to leaving air temp of different evaporator temperature;
Step 3, the pre-control position that the mixed wind air-out ratio of cold and hot air of storing according to memory module and the mapping table of blender door position obtain blender door;
Step 4, due to the air-out mode for different, the actual leaving air temp value of calculating according to vehicle interior temperature sensor is different, so need to go out according near the temperature computation air outlet of different air-out modes and temperature collect module collection the actual leaving air temp in air-conditioning box, the weighing factor that each concrete air-out mode calculates leaving air temp needs real vehicle to demarcate;
Step 5, described air-conditioner controller is also provided with PID controller, input using the heal differential of target leaving air temp and actual leaving air temp as PID controller, this PID controller carries out ratio (P), integration (I) and differential (D) to the heal differential of input and calculates, and finally draws controlling quantity;
Step 6, is added by described controlling quantity and the pre-control position of the blender door calculating the control position that is blender door;
Step 7, processes to reduce the shake of blender door to the control position of the blender door of air-conditioner controller output do filtering;
Step 8, carries out sluggishness to filtered blender door control position and processes.
Concrete, the computing formula of the maximum leaving air temp Tmax of described air-conditioning box is:
Tmax=(Teng-Teva)×μ+Teva，
Wherein: Tmax is the maximum leaving air temp of air-conditioning box;
Teng is engine cooling water temperature;
μ is the dynamic test that automobile calibrates, and need demarcate according to concrete a/c system;
Teva is evaporator temperature.
Concrete, described different evaporator temperature to the computing formula of the influence value of leaving air temp is:
Te=(100–R1)×0.01×Teva,
Wherein: Te is the influence value to leaving air temp of different evaporator temperature;
R1 is operator's compartment blender door percentum.
Because the control position of blender door is relevant with air-out mode, the present invention calculates actual leaving air temp according to air-out mode and vehicle interior temperature sensor reading, input using the difference of target leaving air temp and actual leaving air temp as PID controller, the output of PID controller and the pre-control position phase adduction of blender door are calculated to the final control position of blender door with this, improve the accuracy that mixed air temperature is controlled.
Described filtering is processed and is specially: the filtering of first-order filtering algorithm is carried out in the position to the blender door of air-conditioner controller output.Owing to having carried out filtering processing, the position output valve of this blender door is weighted for this sampled value and last filtered output valve, suitably adjust filtering factor and just can take into account the requirement of sensitivity and smoothness, blender door position can not be suddenlyd change but does to change slowly, to improve the comfort level of human body.
Concrete, described sluggish being specially of processing: blender door motor position changes while being less than a threshold value, and motor position does not change.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (8)
1. an on-board air conditioner mixes air temperature control method, air-conditioner controller receives the outer temperature of vehicle interior temperature, car, evaporator temperature, the engine cooling water temperature gathering from temperature collect module, described air-conditioner controller is also provided with the memory module that stores the mixed wind air-out ratio of cold and hot air and the mapping table of blender door position, it is characterized in that, described control method comprises:
Step 1, at least according to user, arrange and the car internal and external temperature of temperature collect module collection is determined a target leaving air temp;
Step 2, calculates the blending ratio of cold-hot wind according to target leaving air temp, its computing formula is as follows:
reheat[%]=（Tds-Te）/Tmax，
Wherein, reheat[%] be the mixed wind air-out ratio of cold and hot air,
Tds is target leaving air temp,
Tmax is the maximum available leaving air temp of air-conditioning box,
Te is the influence value to leaving air temp of different evaporator temperature;
Step 3, the pre-control position that the mixed wind air-out ratio of cold and hot air of storing according to memory module and the mapping table of blender door position obtain blender door.
2. on-board air conditioner mixes air temperature control method according to claim 1, it is characterized in that, the computing formula of the maximum leaving air temp Tmax of described air-conditioning box is:
Tmax=(Teng-Teva)×μ+Teva，
Wherein: Tmax is the maximum leaving air temp of air-conditioning box;
Teng is engine cooling water temperature;
μ is the dynamic test that automobile calibrates;
Teva is evaporator temperature.
3. on-board air conditioner mixes air temperature control method according to claim 2, it is characterized in that, described different evaporator temperature to the computing formula of the influence value of leaving air temp is:
Te=(100–R1)×0.01×Teva,
Wherein: Te is the influence value to leaving air temp of different evaporator temperature;
R1 is operator's compartment blender door percentum.
4. according to the mixed air temperature control method of on-board air conditioner described in claim 1,2 or 3, it is characterized in that, described air-conditioner controller is also provided with PID controller, after obtaining the pre-control position of blender door described in step 3, enters following operation:
Step 4, goes out the actual leaving air temp in air-conditioning box according near the temperature computation air outlet of different air-out modes and temperature collect module collection;
Step 5, the input using the heal differential of target leaving air temp and actual leaving air temp as PID controller, this PID controller carries out ratio (P), integration (I) and differential (D) to the heal differential of input and calculates, and finally draws controlling quantity;
Step 6, is added by described controlling quantity and the pre-control position of the blender door calculating the control position that is blender door.
5. on-board air conditioner mixes air temperature control method according to claim 4, it is characterized in that, described method also comprises:
The shake of blender door is processed to reduce in control position to the blender door of air-conditioner controller output do filtering.
6. on-board air conditioner mixes air temperature control method according to claim 5, it is characterized in that, described filtering is processed and is specially: the filtering of first-order filtering algorithm is carried out in the position to the blender door of air-conditioner controller output.
7. on-board air conditioner mixes air temperature control method according to claim 6, it is characterized in that, described method also comprises:
Sluggishness is carried out in filtered blender door control position to be processed.
8. on-board air conditioner mixes air temperature control method according to claim 7, it is characterized in that, described sluggish being specially of processing: blender door motor position changes while being less than a threshold value, and motor position does not change.
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Cited By (8)
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| CN104986011A (en) * | 2015-07-31 | 2015-10-21 | 博耐尔汽车电气系统有限公司 | Temperature air door control system of automobile double-drive automatic air conditioner |
| CN105216576A (en) * | 2015-08-28 | 2016-01-06 | 苏州市博得立电源科技有限公司 | Based on the on-board air conditioner householder method of temperature sense |
| CN106274364A (en) * | 2016-08-29 | 2017-01-04 | 博耐尔汽车电气系统有限公司 | A kind of water temperature compensation method for auto Air Conditioner |
| CN107351648A (en) * | 2017-07-20 | 2017-11-17 | 安徽江淮汽车集团股份有限公司 | A kind of double evaporators electric air-conditioning control method |
| CN111050524A (en) * | 2018-10-11 | 2020-04-21 | 爱思开海力士有限公司 | System for cooling storage device and intelligent vehicle comprising same |
| CN111645484A (en) * | 2020-05-21 | 2020-09-11 | 泰铂（上海）环保科技股份有限公司 | Self-adaptive control method for vehicle air conditioner air door actuator |
| CN112428780A (en) * | 2020-12-10 | 2021-03-02 | 中国第一汽车股份有限公司 | Vehicle-mounted air conditioner control system, method, device, equipment and vehicle |
| CN113386522A (en) * | 2021-07-06 | 2021-09-14 | 东风汽车集团股份有限公司 | Automobile air conditioner mixed air door return difference control system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111645484A (en) * | 2020-05-21 | 2020-09-11 | 泰铂（上海）环保科技股份有限公司 | Self-adaptive control method for vehicle air conditioner air door actuator |
| CN111645484B (en) * | 2020-05-21 | 2021-09-14 | 泰铂（上海）环保科技股份有限公司 | Self-adaptive control method for vehicle air conditioner air door actuator |
| CN112428780A (en) * | 2020-12-10 | 2021-03-02 | 中国第一汽车股份有限公司 | Vehicle-mounted air conditioner control system, method, device, equipment and vehicle |
| CN113386522A (en) * | 2021-07-06 | 2021-09-14 | 东风汽车集团股份有限公司 | Automobile air conditioner mixed air door return difference control system and control method thereof |
| CN113386522B (en) * | 2021-07-06 | 2022-03-22 | 东风汽车集团股份有限公司 | Automobile air conditioner mixed air door return difference control system and control method thereof |
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