CN103692881B - A kind of on-board air conditioner mixes air temperature control method - Google Patents
A kind of on-board air conditioner mixes air temperature control method Download PDFInfo
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- CN103692881B CN103692881B CN201310499811.6A CN201310499811A CN103692881B CN 103692881 B CN103692881 B CN 103692881B CN 201310499811 A CN201310499811 A CN 201310499811A CN 103692881 B CN103692881 B CN 103692881B
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Abstract
The invention discloses a kind of on-board air conditioner and mix air temperature control method, described control method comprises: at least determine a target leaving air temp according to the car internal and external temperature of user's setting and temperature collect module collection; The blending ratio of cold-hot wind is calculated according to target leaving air temp; The mixed wind air-out ratio of air stored according to memory module and the mapping table of blender door position obtain the pre-control position of blender door.The present invention calculates the pre-control position of blender door according to accurate computing formula, makes air-conditioning temperature automatically controlled more accurate; Taking into full account the influence value etc. of leaving air temp simultaneously by evaporator temperature, makes blender door motor position control more accurate, to reach fast, accurately, stably to regulate the object of vehicle interior temperature, improves the traveling comfort of a/c system.
Description
Technical field
The present invention relates to air conditioning for automobiles control technology field, in particular, the invention relates to a kind of on-board air conditioner improving Automobile environment and mix air temperature control method.
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, provide comfortable driving and by bus environment be also the factor needing car production producer emphasis to consider.
But existing air conditioning for automobiles is Non-follow control mostly, automobile manual air-conditioning does not have control logic, in order to ensure that there is in car constant comfort temperature, along with the change of car external environment in driving conditions, the change of a/c system operation conditions and user sensation delayed, just need chaufeur constantly vehicles air-conditioner controller, Self-operating air-conditioning, frequently change setting, cause air-conditioner air outlet temperature to change sometimes hot and sometimes coldly, cause the fluctuation of vehicle interior temperature, have impact on the comfort of user in car.And this operates frequently and must bring great potential safety hazard to steering vehicle, the personal safety of serious threat driver and crew.
At present along with the development of auto trade and improving constantly comfort requirement in car, increasing automatic air-conditioning system replaces manual air conditioning system to be applied on automobile.Application number be 201210503030.5 Chinese invention patent application disclose a kind of automobile air conditioner air outlet temperature-controlled process and comprise step: at least to arrange according to user and car internal and external temperature determines a target leaving air temp; The first temperature damper position is calculated according to described target leaving air temp, evaporator temperature and cooling-liquid temperature; The second temperature damper position is calculated according to described target leaving air temp and actual leaving air temp; Temperature damper position is determined according to the first damper positions and the second temperature damper position; And utilize the temperature damper of described temperature damper position control air conditioning for automobiles.Above-mentioned control method is by the algorithm reading in multiple sensors signal He design, and calculate control information by certain control policy and pass to the actuating units such as blender door motor, blowing engine, pattern motor, circulation motor thus make them work, thus control the temperature damper of air conditioning for automobiles, but, in above-mentioned control method its leaving air temp be from the air outlet pipeline being arranged on air-conditioning box inside temperature sensor obtain, the change that temperature hysteresis due to sensor brings air outlet sometimes hot and sometimes cold, causes the traveling comfort of user to decline to a great extent; And, said method owing to not considering the impact of starting rotating speed, different air-out modes etc. on leaving air temp, cause mixed air temperature control can not be quick, accurate, stable in dynamic process, follow the change that environment and user arrange.
Summary of the invention
The object of the invention is to overcome weak point of the prior art, provide a kind of and accurately control blender door position, thus fast, accurately, stably regulate the on-board air conditioner of vehicle interior temperature to mix air temperature control method.
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, the vehicle interior temperature that air-conditioner controller reception gathers from temperature collect module, car outer temperature, evaporator temperature, engine cooling water temperature, described air-conditioner controller is also provided with the memory module storing the mixed wind air-out ratio of air and the mapping table of blender door position, and described control method comprises:
Step 1, at least to arrange according to user and the car internal and external temperature of temperature collect module collection determines 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, the mixed wind air-out ratio that reheat [%] is 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 temperatures;
Step 3, the mixed wind air-out ratio of air stored according to memory module and the mapping table of blender door position obtain the pre-control position of 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 available 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 temperatures;
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, enters following operation described in step 3:
Step 4, goes out the actual leaving air temp in air-conditioning box according to the temperature computation near the air outlet of different air-out modes and temperature collect module collection;
Step 5, using the input of the heal differential of target leaving air temp and actual leaving air temp as PID controller, the heal differential of this PID controller to input carries out ratio (P), integration (I) and differential (D) and calculates, and finally draws controlling quantity;
Step 6, is added with the pre-control position of the blender door calculated the control position being blender door by described controlling quantity.
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, using the input of the difference of target leaving air temp and actual leaving air temp as PID controller, the pre-control position phase adduction of the output of PID controller and blender door is calculated the final control position of blender door with this, improve the accuracy that mixed air temperature controls.
As another improvement of the present invention, described method also comprises:
Filtering process is done to reduce the shake of blender door to the control position of the blender door that air-conditioner controller exports.
Concrete, described filtering process is specially: carry out the filtering of first-order filtering algorithm to the control position of the blender door that air-conditioner controller exports.Owing to having carried out filtering process, the position output valve of this blender door is weighted for this sampled value and last time filtered output valve, suitable adjustment filtering factor just can take into account the requirement of sensitivity and smoothness, make blender door position can not suddenly change but change slowly, to improve the comfort level of human body.
Improve as another kind of the present invention, described method also comprises:
Sluggishness process is carried out to filtered blender door control position.
Concrete, being specially of described sluggishness process: when the change of blender door motor position is less than a threshold value, 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; Taking into full account the influence value etc. of leaving air temp simultaneously by evaporator temperature, makes blender door motor position control more accurate, to reach fast, accurately, stably to regulate the object of vehicle interior temperature, improves the traveling comfort of a/c system.
2, control method of the present invention is adopted, calculate the maximum leaving air temp at thermonuclear place (i.e. air-conditioning box) by the method calculated and calculate air temperature with this, do not need to increase temperature sensor at thermonuclear place, low to the hardware requirement of air-conditioning self, thus save and make car cost.
3, calculate the maximum leaving air temp of air-conditioning box according to engine cooling water temperature, dynamic test and evaporator temperature, make blender door motor position control more accurate.
4, the filtering of first-order filtering algorithm is carried out to the control position of the blender door that air-conditioner controller exports, the control to motor that filtering can avoid control accuracy and data acquisition errors to cause is fluctuated, also do sluggish process simultaneously, prevent the phenomenon of motor vibrating, can make blender door position can transition smoothly, increase control accuracy, increase electrical machinery life, reduce noise.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
This enforcement provides a kind of on-board air conditioner to mix air temperature control method, the vehicle interior temperature that air-conditioner controller reception gathers from temperature collect module, car outer temperature, evaporator temperature, engine cooling water temperature, described air-conditioner controller is also provided with the memory module storing the mixed wind air-out ratio of air and the mapping table of blender door position, and described control method comprises:
Step 1, at least to arrange according to user and the car internal and external temperature of temperature collect module collection determines 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, the mixed wind air-out ratio that reheat [%] is 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 temperatures;
Step 3, the mixed wind air-out ratio of air stored according to memory module and the mapping table of blender door position obtain the pre-control position of blender door;
Step 4, due to for different air-out modes, according to the leaving air temp value difference of the reality that vehicle interior temperature sensor calculates, so need the temperature computation near according to the air outlet of different air-out modes and temperature collect module collection to go out actual leaving air temp in air-conditioning box, each concrete air-out mode needs real vehicle to demarcate to the weighing factor that leaving air temp calculates;
Step 5, described air-conditioner controller is also provided with PID controller, using the input of the heal differential of target leaving air temp and actual leaving air temp as PID controller, the heal differential of this PID controller to input carries out ratio (P), integration (I) and differential (D) and calculates, and finally draws controlling quantity;
Step 6, is added with the pre-control position of the blender door calculated the control position being blender door by described controlling quantity;
Step 7, does filtering process to reduce the shake of blender door to the control position of the blender door that air-conditioner controller exports;
Step 8, carries out sluggishness process to filtered blender door control position.
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 available 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 temperatures;
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, using the input of the difference of target leaving air temp and actual leaving air temp as PID controller, the pre-control position phase adduction of the output of PID controller and blender door is calculated the final control position of blender door with this, improve the accuracy that mixed air temperature controls.
Described filtering process is specially: carry out the filtering of first-order filtering algorithm to the control position of the blender door that air-conditioner controller exports.Owing to having carried out filtering process, the position output valve of this blender door is weighted for this sampled value and last time filtered output valve, suitable adjustment filtering factor just can take into account the requirement of sensitivity and smoothness, make blender door position can not suddenly change but change slowly, to improve the comfort level of human body.
Concrete, being specially of described sluggishness process: when the change of blender door motor position is less than a threshold value, motor position does not change.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. an on-board air conditioner mixes air temperature control method, the vehicle interior temperature that air-conditioner controller reception gathers from temperature collect module, car outer temperature, evaporator temperature, engine cooling water temperature, described air-conditioner controller is also provided with the memory module storing the mixed wind air-out ratio of air and the mapping table of blender door position, it is characterized in that, described control method comprises:
Step 1, at least to arrange according to user and the car internal and external temperature of temperature collect module collection determines 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, the mixed wind air-out ratio that reheat [%] is 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 temperatures;
Step 3, the mixed wind air-out ratio of air stored according to memory module and the mapping table of blender door position obtain the pre-control position of 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 available 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 temperatures;
R1 is operator's compartment blender door percentum.
4. according to claim 1,2 or 3, on-board air conditioner mixes air temperature control method, it is characterized in that, described air-conditioner controller is also provided with PID controller, after obtaining the pre-control position of blender door, enters following operation described in step 3:
Step 4, goes out the actual leaving air temp in air-conditioning box according to the temperature computation near the air outlet of different air-out modes and temperature collect module collection;
Step 5, using the input of the heal differential of target leaving air temp and actual leaving air temp as PID controller, the heal differential of this PID controller to input carries out ratio (P), integration (I) and differential (D) and calculates, and finally draws controlling quantity;
Step 6, is added with the pre-control position of the blender door calculated the control position being blender door by described controlling quantity.
5. on-board air conditioner mixes air temperature control method according to claim 4, it is characterized in that, described method also comprises:
Filtering process is done to reduce the shake of blender door to the control position of the blender door that air-conditioner controller exports.
6. on-board air conditioner mixes air temperature control method according to claim 5, it is characterized in that, described filtering process is specially: carry out the filtering of first-order filtering algorithm to the control position of the blender door that air-conditioner controller exports.
7. on-board air conditioner mixes air temperature control method according to claim 6, it is characterized in that, described method also comprises:
Sluggishness process is carried out to filtered blender door control position.
8. on-board air conditioner mixes air temperature control method according to claim 7, it is characterized in that, being specially of described sluggishness process: when the change of blender door motor position is less than a threshold value, motor position does not change.
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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 |
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