CN202833067U - Controller of external-control variable displacement compressor - Google Patents
Controller of external-control variable displacement compressor Download PDFInfo
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- CN202833067U CN202833067U CN 201220468901 CN201220468901U CN202833067U CN 202833067 U CN202833067 U CN 202833067U CN 201220468901 CN201220468901 CN 201220468901 CN 201220468901 U CN201220468901 U CN 201220468901U CN 202833067 U CN202833067 U CN 202833067U
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Abstract
The utility model provides a controller of an external-control variable displacement compressor. The controller comprises a sensor signal input unit, a bus communicator, a power supply manager and a central processing unit, wherein the output port of the power supply manager is connected with the power supply input ports of the sensor signal input unit, the bus communicator and the central processing unit, the output port of the central processing unit is connected with the input ports of the bus communicator and the external-control variable displacement compressor, and the input port of the central processing unit is connected with the output port of the external-control variable displacement compressor. According to the controller, the external-control variable displacement compressor can be stabilized in a suitable displacement region, comfort and safety requirements for a car by passengers are met, and vehicle energy consumption can be reasonably saved.
Description
Technical field
The utility model relates to automobile heat supply, heating ventilation and air-conditioning system, particularly the controller of the external control variable compressor in this system.
Background technique
Regulate, the air-conditioning temperature fluctuation is little, low power consumption and other advantages by the air-conditioning system continuous and stable owing to having for variable compressor, more and more used in automotive air-conditioning system, the internal control variable displacement compressor that extensively adopts now utilizes the self balancing of internal system pressure to adopt the mode of machinery control.This mode exists degree of regulation poor, and the corresponding time is waited problem slowly, thus cause energy-saving effect not significantly, the problems such as system oscillation and evaporimeter frosting.
In order to address these problems, the external control variable compressor begins to come out.Yet present external control variable compressor system control complexity and reliability are lower.How to improve external control variable compressor system problem in these areas, thus improve applicability with given play to its energy-conservation be to need the difficult problem of solution badly with the Inherent advantage on the problems such as frosting.
The model utility content
For at least one aspect that addresses the above problem, the utility model proposes a kind of controller of external control variable compressor, comprise the sensor signal loader, the bus communication device, power supervisor, and central processing unit (CPU), the output port of wherein said power supervisor and described sensor signal loader, described bus communication device, and the power input mouth of described central processing unit (CPU) links to each other, the output port of described central processing unit (CPU) links to each other with the input port of described bus communication device and described external control variable compressor, and the input port of described central processing unit (CPU) links to each other with the output port of described external control variable compressor.
Controller according to an aspect of the present utility model, wherein, described sensor signal loader is connected to one or more in the outer temperature transducer of car, vehicle interior temperature sensor, evaporator temperature sensor, leaving air temp sensor, A/C pressure sensor, the air humidity sensor.
According to the controller of an aspect of the present utility model, wherein, described bus communication device links to each other with the transmitting element of the speed of a motor vehicle, engine speed, car load battery electric quantity signal.
Controller according to an aspect of the present utility model, wherein, described central processing unit (CPU) comprises Signal Pretreatment unit and heat exchange EQUILIBRIUM CALCULATION FOR PROCESS unit, wherein said pretreatment unit receives the input from described sensor signal loader and described bus communication device, then described input is converted to the required input signal in heat exchange EQUILIBRIUM CALCULATION FOR PROCESS unit, described heat exchange EQUILIBRIUM CALCULATION FOR PROCESS unit calculates the control signal of exporting to described external control variable compressor.
According to the controller of an aspect of the present utility model, wherein, described central processing unit (CPU) is microprocessor of 16 bit chip.
According to the controller of an aspect of the present utility model, wherein, described bus communication device receives the signal input from engine controller and car body controller.
According to the controller of an aspect of the present utility model, wherein, power management module provides its required stabilized power source to described sensor signal loader, described bus communication device and described central processing unit (CPU).
According to the controller of an aspect of the present utility model, wherein, the input port received current feedback signal of the described central processing unit (CPU) that links to each other with the output port of described external control variable compressor.
By using the utility model, it is interval that the external control variable compressor can be stabilized in suitable discharge capacity, thereby not only satisfied the passenger to the comfortable security requirement in compartment but also can rationally save the automobile energy consumption.
Description of drawings
For ease of understanding, by the indefiniteness example embodiment of the present utility model is described with reference to the accompanying drawings.Among the figure:
Fig. 1 is the structural representation of the controller of external control variable compressor;
Fig. 2 is vehicle heat exchange amount schematic diagram.
Embodiment
Specify unless add in addition, as from also cognoscible the following discussion, this specification in the whole text in, utilize such as " processing ", " calculating ", " determining " the discussion of term to represent to use action or the process of the particular device such as computer or similar computing electronics.In the context of the present specification, computer or similar computing electronics can be handled or figure signal.These signals are typically expressed as physical electronic or the quantity of magnetism in storage, register or out of Memory storage device, transmitting set or the display unit of computer or similar computing electronics.For example, computing electronics can comprise the one or more processor of carrying out one or more specific functions.
Fig. 1 provided external control variable compressor of the present utility model with and controller.As seen from the figure, the controller of external control variable compressor mainly comprises the parts such as power supervisor, sensor signal loader, bus communication device and central processing unit (CPU).The controller of external control variable compressor passes through central processing unit (CPU) and its control object wherein, i.e. external control variable compressor communication.Central processing unit (CPU) sends pwm control signal to the external control variable compressor, thereby controls its operation, and the external control variable compressor also sends current feedback signal to central processing unit (CPU).Central processing unit (CPU) obtains reference and the diagnostic signal of reflection external control variable compressor running state from feedback signal.
In the controller of external control variable compressor, the output port of power supervisor links to each other with the power input mouth of sensor signal loader, bus communication device and central processor unit, thereby to these parts needed stabilized power source of their normal operations that provides safeguard.
The sensor signal input unit is mainly used in receiving the input signal of related sensor, comprises the input from parts such as the outer temperature transducer of car, vehicle interior temperature sensor, evaporator temperature sensor, leaving air temp sensor, A/C pressure sensor, air humidity sensors.The sensor signal loader inputs to central processing unit (CPU) with the input signal of multiple sensors.In addition, as a kind of optimal way, these input signals can be provided for central processing unit (CPU) again after through respective handling such as filtering.
Bus communication device controller is communicated by letter with other parts of car load, such as engine controller (ECM) and car body controller (BCM) etc., be used for receiving the correlated inputs signal that control external control variable compressor may need, such as the speed of a motor vehicle, engine speed, car load battery electric quantity etc.The bus communication device can also be exported the required compressor coherent signal of other parts simultaneously, such as the start/stop of compressor signal, and compressor consumption of engine torque signal etc.The current feedback signal that these signals can send from the external control variable compressor.
Central processing unit (CPU) is the core constituent elements of the controller of external control variable compressor.It is based on the automatic air condition control algorithm of energy balance theorem and work.
According to principle of conservation of energy, when vehicle is in steady-working state, vehicle's passenger compartment and extraneous heat exchange amount (comprise the heat by conduction load with engine compartment, the radiation heat of sunlight load is with the convection heat load of ambient air) should reach balance with the heat exchange of carrying out in the passenger compartment by heating, heating ventilation and air-conditioning system.Fig. 2 shows the many places thermal source that exists in the vehicle's passenger compartment, comprise from the bottom of roof, the car, the convection heat load of the energy environment air at a plurality of positions such as vehicle body side (
P Body (
t)), the radiation heat load that transmits by the vehicle body window of sunlight (
P Window (
t)) heat by conduction of engine compartment load (
P IntMass (
t)), and the output of heating, heating ventilation and air-conditioning system (
P HVAC (
t)).
Relation between the above-mentioned thermal source can represent by following formula.
In the top formula, k is the scaling factor of power variation and temperature variation,
T Compartment Be the target temperature in compartment, determined by the user,
T Compartment (
t 0 ) be the initial temperature in compartment,
P Body (
t),
P Window (
t),
P IntMass (
t) directly provided by sensor signal loader, bus communication device, perhaps from the signal that they provide, obtain, for example, obtain by the Signal Pretreatment unit in the central processing unit (CPU).And unknown parameter is
P HVAC (
t).Comprise heat exchange EQUILIBRIUM CALCULATION FOR PROCESS unit in the central processing unit (CPU), be used for according to above-mentioned Formula For Solving
P HVAC (
t).As understood by the skilled person in the art, this can realize by various known means.For example, can realize by hardware circuit, such as the combination of basic arithmetic circuit and differentiator, perhaps also can realize by software or firmware.
Central processing unit (CPU) is to be the core of controller, also can select the microprocessor of 16 bit chips such as Freescale, Infineon, NEC to realize.The current feedback signal that central processing unit (CPU) also receives the external control variable compressor as a reference and diagnostic signal.
The automatic air condition control algorithm obtains current vehicle driving-cycle by related sensor, and can calculate the output power of heat supply, heating ventilation and air-conditioning system according to principle of conservation of energy.Thereafter, can further draw and satisfy the needed air-conditioning system load of passenger compartment riding comfort and refrigeration requirement target (both evaporator temperature desired values) under the current working, then by the required air-out volume of current working, the pressure of air-conditioning system and ambient temperature calculate the workload demand (being the required control discharge capacity of external control compressor) of external control compressor.Convert external control compressor control valve electric current to according to the compressor control characteristic at last.Intelligent controller by external control variable compressor described in the utility model is exported external control compressor control valve control electric current by the PWM mode, reaches the purpose of control external control compressor discharge capacity.
In control algorithm described in the utility model, the passenger compartment travelling comfort is divided into a plurality of aimss of systems, and takes respectively PI to add feedforward arithmetic control for different target.For the control of passenger compartment temperature, this algorithm is take the passenger compartment target temperature as control object, and the energy of passenger compartment thermal balance point obtains stable vaporizer target temperature rapidly for feedback adopts PI to add feedforward arithmetic.For Air-condition system control, adopting the vaporizer target temperature is control object, and evaporator surface temperature transducer reading is feedback, adopts PI to add the target current that feedforward arithmetic obtains stable external control compressor solenoid valve rapidly.For the control of external control compressor system, adopting external control compressor solenoid valve aperture is control object, and external control compressor solenoid valve feedback current value is feedback, adopts PI to add the control that feedforward arithmetic obtains stable external control compressor discharge capacity rapidly.Add feedforward arithmetic by multiple PI, can obtain fast stable control output.
The utility model also considered under the car load environment other driving operating modes on the impact of external control compressor control (for example under the defrosting-defogging operating mode to the control of compressor, under the air-conditioning economic model to the control of compressor), and on control algorithm, protected.For example under the operating mode of high-engine rotating speed to the protection of compressor displacement; Under the too high operating mode of high pressure to the protection of compressor; Under the excessively low operating mode of ambient temperature to the protection of compressor.Every protection threshold values can carry out relevant demarcation setting by system test with calibration value.
The initial threshold of described systemic presupposition can be carried out corresponding initial alignment according to different vehicles and air-conditioning box type.Main aim is control object is reached rapidly and to be stabilized near the re-set target value.Under the prerequisite that satisfies the vehicle heat load, reduce the discharge capacity of compressor as far as possible, realize the optimization of vehicle riding comfort and fuel economy.
Although above shown the current content that is considered to exemplary characteristics, one skilled in the art will appreciate that in the situation that does not deviate from claimed theme, can carry out various modifications to the specific embodiment described in the utility model.Therefore, claimed theme is not limited to disclosed specific example, and on the contrary, it has comprised all the elements within the scope that falls into claims.
Claims (8)
1. the controller of an external control variable compressor comprises sensor signal loader, bus communication device, power supervisor and central processing unit (CPU), wherein
The output port of described power supervisor links to each other with the power input mouth of described sensor signal loader, described bus communication device and described central processing unit (CPU), the output port of described central processing unit (CPU) links to each other with the input port of described bus communication device and described external control variable compressor, and the input port of described central processing unit (CPU) links to each other with the output port of described external control variable compressor.
2. controller as claimed in claim 1, wherein, described sensor signal loader is connected to one or more in the outer temperature transducer of car, vehicle interior temperature sensor, evaporator temperature sensor, leaving air temp sensor, A/C pressure sensor, the air humidity sensor.
3. controller as claimed in claim 1, wherein, described bus communication device links to each other with the transmitting element of the speed of a motor vehicle, engine speed, car load battery electric quantity signal.
4. such as any one the described controller among the claim 1-3, wherein, described central processing unit (CPU) comprises Signal Pretreatment unit and heat exchange EQUILIBRIUM CALCULATION FOR PROCESS unit, wherein said pretreatment unit receives the input from described sensor signal loader and described bus communication device, then described input is converted to the required input signal in heat exchange EQUILIBRIUM CALCULATION FOR PROCESS unit, described heat exchange EQUILIBRIUM CALCULATION FOR PROCESS unit calculates the control signal of exporting to described external control variable compressor.
5. such as any one the described controller among the claim 1-3, wherein, described central processing unit (CPU) is microprocessor of 16 bit chip.
6. such as any one the described controller among the claim 1-3, wherein, described bus communication device receives the signal input from engine controller and car body controller.
7. such as any one the described controller among the claim 1-3, wherein, power management module provides its required stabilized power source to described sensor signal loader, described bus communication device and described central processing unit (CPU).
8. such as any one the described controller among the claim 1-3, wherein, the input port received current feedback signal of the described central processing unit (CPU) that links to each other with the output port of described external control variable compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220468901 CN202833067U (en) | 2012-09-14 | 2012-09-14 | Controller of external-control variable displacement compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220468901 CN202833067U (en) | 2012-09-14 | 2012-09-14 | Controller of external-control variable displacement compressor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234989A (en) * | 2013-06-14 | 2014-12-24 | 福特环球技术公司 | Variable discharge compressor control |
| CN104807149A (en) * | 2015-05-06 | 2015-07-29 | 安徽江淮汽车股份有限公司 | Automobile air-conditioning system and control method thereof |
| CN107719062A (en) * | 2017-09-19 | 2018-02-23 | 华晨汽车集团控股有限公司 | A kind of control method of Automotive Variable-displacement compressor |
-
2012
- 2012-09-14 CN CN 201220468901 patent/CN202833067U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234989A (en) * | 2013-06-14 | 2014-12-24 | 福特环球技术公司 | Variable discharge compressor control |
| CN104234989B (en) * | 2013-06-14 | 2018-09-14 | 福特环球技术公司 | Compressor with variable displacement |
| CN104807149A (en) * | 2015-05-06 | 2015-07-29 | 安徽江淮汽车股份有限公司 | Automobile air-conditioning system and control method thereof |
| CN104807149B (en) * | 2015-05-06 | 2017-09-05 | 安徽江淮汽车集团股份有限公司 | Air conditioning system for vehicle and its control method |
| CN107719062A (en) * | 2017-09-19 | 2018-02-23 | 华晨汽车集团控股有限公司 | A kind of control method of Automotive Variable-displacement compressor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20200914 |