CN102913314A - Intelligent control device and method for cooling system - Google Patents
Intelligent control device and method for cooling system Download PDFInfo
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- CN102913314A CN102913314A CN2012104488123A CN201210448812A CN102913314A CN 102913314 A CN102913314 A CN 102913314A CN 2012104488123 A CN2012104488123 A CN 2012104488123A CN 201210448812 A CN201210448812 A CN 201210448812A CN 102913314 A CN102913314 A CN 102913314A
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Abstract
The invention discloses an intelligent control device and method for a cooling system, which can control the temperature of a cooling medium within an optimal range, improve the operational efficiency of an operating device, prolong the service life of a system or component, lower the energy consumption, improve the working efficiency and reduce the noise caused by a fan. The technical point is that the intelligent control device comprises a monitoring sensor, a control unit, an input unit, an output unit, a human-computer interaction software and hardware system and a brushless DC fan, and is characterized in that the monitoring sensor and the input unit are connected with the input terminal of the control unit, and the output terminal of the control unit is connected with the output unit and the brushless DC fan. The invention belongs to the technical field of refrigeration.
Description
Technical field
The present invention relates to a kind of system controller and controlling method thereof, specifically, is a kind of Intelligence Cooling System control gear and controlling method thereof; Belong to refrigeration technology field.
Background technique
Vehicle and engineering machinery all can produce a large amount of heat in the process of work.Because the variation of working environment and operating mode, corresponding variation also can occur in the heat that produces, for the normal operation that keeps equipping, usually adopt various coolers or heat exchanger, in environment, device remains in the operating range of normal temperature the mode of employing cooling fan pressure cooling thereby make respectively with dissipation of heat.Traditional cooling system, its cooling fan normally is installed on the motor, the change of rotation speed of the fan is that the variation by engine speed comes respective change, cooling effect is directly relevant with the rotating speed of motor, thereby the heat exchange requirement that cooling system can not satisfy all operating modes of system appears, often make the motor of vehicle and engineering machinery, the various generation heats such as hydraulic work system, hydraulic drive system, pressurization system also need the system equipment of cooling to produce overheated or surfusion.Particularly under the condition of the large Operating torque of low engine speed, because the rotating speed of cooling fan is slower, cooling effect is poor, and it is overheated just often to cause; When startup idling, ambient temperature are low, can cause again cold.The system that can not guarantee always works in the best operating temperature, cause shortening system or parts life-span, increase energy consumption, reduce the problems such as working efficiency.In addition, when engine speed was higher, rotation speed of the fan was also higher, thereby the noise that causes fan to cause is excessive.
Summary of the invention
For the problems referred to above, the present invention discloses a kind of Intelligence Cooling System control gear and controlling method thereof, the method guarantees that the temperature of cooling medium is controlled in the optimum range, improve the operating efficiency of apparatus for work, the life-span of prolongation system or parts, reduction energy consumption have improved working efficiency, have reduced the noise that fan causes.
For addressing the above problem, last technological scheme provided by the invention is such: this cooling system control apparatus, comprise monitoring sensor, control unit, input unit, output unit, man-machine interaction software and hardware system and brushless DC fan, it is characterized in that, monitoring sensor is connected with the input end of control unit with input unit, and the output terminal of control unit is connected with output unit and brushless DC fan.
Above-mentioned Intelligence Cooling System control gear, it is characterized in that described monitoring sensor comprises engine intercooler temperature transducer, cabin temperature temperature transducer and air-conditioning system temperature sensor, engine coolant temperature sensor, motor water temperature sensor.
Above-mentioned Intelligence Cooling System control gear is characterized in that described input unit comprises the forced refrigeration switching signal.
A technological scheme is such after provided by the invention: this Intelligence Cooling System controlling method comprises the steps: successively
(1) at first carries out system testing, determine whether system is normal, and system is normal, enters the forced refrigeration determining program; Such as system mistake, go to and close analog signal output and call error processor, send relevant error to man-machine interaction soft and hardware system, and prompting relevant error point; After the error handler flow process that is finished, turn back to the system testing flow process;
(2) the output enable input signal is the electric generator of vehicle start stop signal, and when generator carried out work, control unit collected generator and enters working state, and control unit exports brushless DC fan to according to the aanalogvoltage that should export.When the generator state that quits work, control unit is zero to brushless DC fan according to the output aanalogvoltage, and brushless DC fan is quit work.
(3) the forced refrigeration input switch is the forced refrigeration state, and it is cooling fan rotation speed that the running speed system of getting of system arranges maximum (top) speed; If be not in the forced refrigeration state, measure engine intercooler temperature, cabin Wen Wendu and air-conditioning system temperature, engine coolant temperature, motor water temperature, temperature signal is carried out the AD conversion, and measurement signal judged, if measurement signal is wrong, it is cooling fan rotation speed that the running speed system of getting of system arranges maximum (top) speed;
(4) if measurement signal is correct, be the algorithm of rotating speed according to temperature transition, obtain respectively the corresponding rotation speed of the fan of temperature value of engine intercooler temperature, cabin Wen Wendu and air-conditioning system temperature, engine coolant temperature, motor water temperature, get maximum value as system's running speed;
(5) by performance, the startup fan operation of system to sensor settings, the temperature value that sensor is surveyed carries out computing and draws the corresponding aanalogvoltage of this sensor, and the analog voltage signal that fan is corresponding is the multichannel of association or the maximum value in No. one temperature transducer gained aanalogvoltage out;
(6) according to system performance, export, according to the aanalogvoltage of trying to achieve, control unit is pressed analog voltage signal to brush-less fan, and control unit is monitored rotation speed of the fan;
(7) drive brushless DC fan by changing the aanalogvoltage of exporting in the control unit, the rotating speed of fan changes accordingly, thereby cooling effect changes;
(8) by man-machine interaction optimal parameter is set, makes system operate in the optimum state, and constantly state and the indicating fault of supervisory control system running.
Compared with prior art, the present invention has following advantage: adopt the temperature of cooling medium as signal input quantity, fan is carried out rotating speed control, and when temperature is low, the fan low cruise, when temperature was high, fan entered the high speed operation state.Rotation speed of the fan is monitored, can be guaranteed that the temperature of cooling medium is controlled in the optimum range, improve the operating efficiency of apparatus for work, the life-span of prolongation system or parts, reduction energy consumption have improved working efficiency, have reduced the noise that fan causes.This device and control algorithm have stronger robustness, when detecting fault or control unit and be de-energized, automatically switch to the relay working state, make system carry out work by maximum heat exchange amount.After fault is got rid of.Automatically switch to control unit control, make device enter normal operation.
Description of drawings
Fig. 1 is the composition schematic representation of Intelligence Cooling System control gear of the present invention;
Fig. 2 is the corresponding relation figure of coolant temperature and rotation speed of the fan;
Fig. 3 is the controlling method flow chart of Intelligence Cooling System control gear of the present invention.
Wherein: monitoring sensor 1, control unit 2, input unit 3, output unit 4, man-machine interaction software and hardware system 5 and brushless DC fan 6, engine intercooler temperature transducer 61, cabin temperature temperature transducer 62, air-conditioning system temperature sensor 63, engine coolant temperature sensor 64, motor water temperature sensor 65.
Embodiment
The present invention will be described in detail below in conjunction with the drawings and specific embodiments, but do not consist of any limitation of the invention.
This Intelligence Cooling System control gear, consult Fig. 1, comprise monitoring sensor 1, control unit 2, input unit 3, output unit 4, man-machine interaction software and hardware system 5 and brushless DC fan 6, wherein, monitoring sensor comprises engine intercooler temperature transducer 61, cabin temperature temperature transducer 62, air-conditioning system temperature sensor 63, engine coolant temperature sensor 64, motor water temperature sensor 65; Input unit 3 comprises forced refrigeration switching signal, manual switchover input, output enable input and the input of other signal.Monitoring sensor 1 is connected with input unit and is connected with the input end of control unit 2, and the output terminal of control unit 2 is connected with output unit 4 and brushless DC fan 6, and control unit 2 is connected with man-machine interaction software and hardware system 5.Monitoring sensor inputs to control unit 2 with the temperature signal that gathers, and control unit 2 receives the input signal of input unit 3 simultaneously, and the signal of 2 pairs of inputs of control unit carries out conversion, processing.By system to the performance of sensor settings, start temperature value that temperature value, excess temperature value and the sensor of brushless DC fan 6 operations survey and carry out computing and draw the corresponding aanalogvoltage fan of sensor analog voltage signal and be related multichannel or the maximum value in No. one temperature transducer gained aanalogvoltage out; Its compute mode is for changing the variation that causes the sensor electrical resistance according to medium temperature.Sensor electrical resistance and pull-up resistor consist of a minute press mechanism.MCU according to the sensor electrical resistance get the AD value that voltage transitions becomes MCU to gather.By AD value=(sensor electrical resistance/(sensor electrical resistance+pull-up resistance values)) * 1023).Calculate the resistance value at sensor place.Then this resistance value checks in corresponding temperature value by sensor resistance and temperature characteristic table.And by the Sensor Analog Relay System magnitude of voltage: present temperature gap=(at present temperature value-set temperature value), temperature gap and=at present temperature gap+last time temperature gap and, the analog voltage=weights coefficient * temperature gap of output and, every several seconds above computing is upgraded, the output analog voltage changes rotation speed of the fan, thereby affect temperature variation and affect the output analog voltage, make the optimum temperature value of temperature and setting more approaching.The fan analog voltage signal is as being multiple sensor control, and its value is aanalogvoltage maximum value in the multichannel.When controlling for single-sensor, get its aanalogvoltage.And with the work of the aanalogvoltage of gained output drive fan, thereby reach the purpose of regulating rotation speed of the fan.Described man-machine interaction software and hardware system 5 is transfer mechanisms that input signal changes, the transfer mechanism that output signal changes, the main control unit that input, output signal are processed is used for the display unit that shows and the operating unit formation of related data being set input.The man-machine interaction software and hardware system comprises the equipment that hand-held equipment, locomotive operation platform are settled, and the professional software of PC or mobile phone terminal, wireless device or wired unit, reception converting unit consist of.The interactive software system comprises that mobile phone operation, computer operation are by the system of software mode.
The controlling method of Intelligence Cooling System control gear is consulted Fig. 3, and its control step is as follows:
(1), the beginning after, control gear at first carries out system testing, determines whether system normal, and system is normal, enters the forced refrigeration determining program; The content of test mainly contains: the certainly mensuration of control unit and intelligent drives unit; Whether the parameters of measuring control or system is normal.Read the data that exist among the EEPROM.Whether temperature transducer connects normally; Whether input/output port is normal etc.Such as system mistake, automatically switch to relay operation, make fan by maximum (top) speed work, send relevant error to the man-machine interaction software and hardware system.And prompting relevant error point.After executing the error handler handling process, turn back to the system testing flow process;
(2) if the forced refrigeration input switch is the forced refrigeration state, it is cooling fan rotation speed that the running speed system of getting of system arranges maximum (top) speed; If be not in the forced refrigeration state, measure engine intercooler temperature, cabin Wen Wendu and air-conditioning system temperature, engine coolant temperature, motor water temperature, temperature signal is carried out the AD conversion, and measurement signal judged, if measurement signal is wrong, it is cooling fan rotation speed that the running speed system of getting of system arranges maximum (top) speed.
(3) if measurement signal is correct, be the simple PD algorithm of rotating speed according to temperature transition, obtain respectively the corresponding rotation speed of the fan of temperature value of engine intercooler temperature, cabin Wen Wendu and air-conditioning system temperature, engine coolant temperature, motor water temperature.Get maximum value as system's running speed.
(4), by system to the performance of sensor settings, start temperature value that temperature value, excess temperature value and the sensor of fan operation survey and carry out computing and draw the corresponding aanalogvoltage fan of sensor analog voltage signal for related multichannel or the maximum value in No. one temperature transducer gained aanalogvoltage out, consult Fig. 2; Its compute mode is for changing the variation that causes the sensor electrical resistance according to medium temperature.Sensor electrical resistance and pull-up resistor consist of a minute press mechanism.MCU according to the sensor electrical resistance get the AD value that voltage transitions becomes MCU to gather.By AD value=(sensor electrical resistance/(sensor electrical resistance+pull-up resistance values)) * 1023).Calculate the resistance value at sensor place.Then this resistance value checks in corresponding temperature value by sensor resistance and temperature characteristic table.And by the Sensor Analog Relay System magnitude of voltage: present temperature gap=(at present temperature value-set temperature value), temperature gap and=at present temperature gap+last time temperature gap and, the analog voltage=weights coefficient * temperature gap of output and, every several seconds above computing is upgraded, the fan analog voltage signal is as being multiple sensor control, and its value is aanalogvoltage maximum value in the multichannel.When controlling for single-sensor, get its aanalogvoltage.
(5), during the output enable input service, according to system performance, export, according to the aanalogvoltage of trying to achieve, control unit is pressed the aanalogvoltage output drive fan of gained, and rotation speed of the fan is monitored.
(6), output is monitored, make system form a closed loop control, when monitoring fan and occur that stall or short circuit etc. are relatively more serious directly to affect the performance of fan, close output voltage values to fan, effectively protect fan.
(6), by changing the aanalogvoltage drive fan in the control unit, the rotating speed of fan changes accordingly, thus cooling effect changes.Then the temperature of the corresponding cooling medium of vehicle changes.
(7), by the man-machine interaction software and hardware system optimal parameter is set, make system operate in the optimum state.And constantly state and the indicating fault of supervisory control system running.
Adopt Intelligence Cooling System control gear of the present invention at commercial vehicle, by the above corresponding controlling method, by changing the rotating speed of cooling fan, thereby changed the air quantity by cooling system, thereby changed cooling effect, each cooling work medium is maintained in the normal range (NR).
In cooling fan controller, control unit is with intercooler temperature, cabin Wen Wendu and air-conditioning system temperature, engine water temperature temperature, the motor water temperature of collecting temperature sensor, change into the AD value, and obtain rotating speed corresponding to each sensor according to the temperature rotating speed corresponding relation of default; And get among the three maximum value as cooling fan rotation speed.
In case the fan running speed is determined, according to the characteristic of system, namely adopt to calculate or rotation speed of the fan that experimental technique is determined and the relation by driving voltage, calculate and analog voltage signal corresponding to definite rotating speed.Control unit carries out driver output to corresponding analog voltage signal, and rotating speed is monitored.When gross error occurring, close the driving aanalogvoltage.Perhaps when control unit generation gross error, the control unit positive closing is exported and is automatically switched to relay output and maybe can adopt the hardware manual equipment to make fan keep the maximum (top) speed operation.By the voltage signal size of control intelligent drives unit, i.e. regulation output driving force.Thereby regulated rotation speed of the fan, namely changed the temperature of cooling medium.
Technological scheme of the present invention is not limited to above embodiment, and the identical or similarity method of described technological scheme is invented in every employing, all should list protection scope of the present invention in.
Claims (4)
1. cooling system control apparatus, comprise monitoring sensor, control unit, input unit, output unit, man-machine interaction software and hardware system and brushless DC fan, it is characterized in that, monitoring sensor is connected with the input end of control unit with input unit, and the output terminal of control unit is connected with output unit and brushless DC fan.
2. Intelligence Cooling System control gear according to claim 1, it is characterized in that described monitoring sensor comprises engine intercooler temperature transducer, cabin temperature temperature transducer, air-conditioning system temperature sensor, engine coolant temperature sensor, motor water temperature sensor.
3. Intelligence Cooling System control gear according to claim 1 is characterized in that, described input unit comprises the forced refrigeration switch, manual switchover input, output enable input.
4. the Intelligence Cooling System controlling method shown in the claim 1 is characterized in that, comprises the steps: successively
(1) at first carries out system testing, determine whether system is normal, and system is normal, enters the forced refrigeration determining program; Such as system mistake, go to and close analog signal output and call error processor, send relevant error to man-machine interaction soft and hardware system, and prompting relevant error point; After the error handler flow process that is finished, turn back to the system testing flow process;
(2) the output enable input signal is the electric generator of vehicle start stop signal, and when generator carried out work, control unit collected generator and enters working state, and control unit exports brushless DC fan to according to the aanalogvoltage that should export.When the generator state that quits work, control unit is zero to brushless DC fan according to the output aanalogvoltage, and brushless DC fan is quit work.
(2) the forced refrigeration input switch is the forced refrigeration state, and it is cooling fan rotation speed that the running speed system of getting of system arranges maximum (top) speed; If be not in the forced refrigeration state, measure engine intercooler temperature, cabin Wen Wendu and air-conditioning system temperature, engine coolant temperature, motor water temperature, temperature signal is carried out the AD conversion, and measurement signal judged, if measurement signal is wrong, it is cooling fan rotation speed that the running speed system of getting of system arranges maximum (top) speed;
(3) if measurement signal is correct, be the algorithm of rotating speed according to temperature transition, obtain respectively the corresponding rotation speed of the fan of temperature value of engine intercooler temperature, cabin Wen Wendu and air-conditioning system temperature, engine coolant temperature, motor water temperature, get maximum value as system's running speed;
(4) by performance, the startup fan operation of system to sensor settings, the temperature value that sensor is surveyed carries out computing and draws the corresponding aanalogvoltage of this sensor, and the analog voltage signal that fan is corresponding is the multichannel of association or the maximum value in No. one temperature transducer gained aanalogvoltage out;
(5) according to system performance, export, according to the aanalogvoltage of trying to achieve, control unit is pressed analog voltage signal to brush-less fan, and control unit is monitored rotation speed of the fan;
(6) drive brushless DC fan by changing the aanalogvoltage of exporting in the control unit, the rotating speed of fan changes accordingly, thereby cooling effect changes;
(7) by man-machine interaction optimal parameter is set, makes system operate in the optimum state, and constantly state and the indicating fault of supervisory control system running.
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| CN104669985A (en) * | 2013-12-02 | 2015-06-03 | 北汽福田汽车股份有限公司 | Cooling system and method of air conditioner of vehicle |
| CN108463098A (en) * | 2018-05-02 | 2018-08-28 | 华北理工大学 | A kind of computer cabinet radiator |
| CN108778793A (en) * | 2016-03-11 | 2018-11-09 | 株式会社电装 | Control the air conditioning control device of air conditioner for vehicles |
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Application publication date: 20130206 |