CN103912961A - CAN (Controller Area Network) bus based electric motor coach electromotive air conditioning technology - Google Patents
CAN (Controller Area Network) bus based electric motor coach electromotive air conditioning technology Download PDFInfo
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- CN103912961A CN103912961A CN201310005717.0A CN201310005717A CN103912961A CN 103912961 A CN103912961 A CN 103912961A CN 201310005717 A CN201310005717 A CN 201310005717A CN 103912961 A CN103912961 A CN 103912961A
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Abstract
An adopted technical scheme of a CAN (Controller Area Network) bus based electric motor coach electromotive air conditioning technology is as shown in a figure 1 and a figure 2. The figure 1 is a system function wiring figure and the figure 2 is a controller real object figure. As shown in the figure 1, the system is formed by a control panel and an air conditioner controller (top controller) which are connected through a CAN bus to perform data exchange; a panel controller is arranged close to a driver to enable operation to be convenient; the air conditioner controller is arranged at the top of the coach to achieve control and signal detection of a compressor, a condensate fan and an evaporation fan; the driver achieves operation and setting of an air conditioner through operation on the panel; the panel controller sends an operation command of the driver to the top controller through the CAN bus; the top controller achieves frequency converting control of the compressor, the condensate fan and the evaporation fan through an appropriate control algorithm and meanwhile sends collected signals to a panel to display and alarm.
Description
Technical field
This technology is applicable to defer to the electric automobile electric air-conditioning technical field of CAN bus communication.
Background technology
Becoming increasingly conspicuous of the problem such as oil crisis and environmental pollution, makes electric automobile more and more cause social attention, becomes the developing direction of future automobile.Electric automobile is compared with traditional combustion engine automobile, and abroad still in industrialization initial preparatory stage, associated new and high technology and product also depend on the support of providing business together, not yet form new industrial system.Simultaneously, in developed country, the input of the orthodox car established huge production scale of industry and social infrastructure, and the powerful inertia of development, may form in some sense the social cost that hinders its development young mobile, make them be difficult to make a decision to realize the strategic change of essence, thereby likely for China tries to gain time precious to one.Air-conditioning system on orthodox car obtains power from internal combustion engine, adopts mechanical commprssor, and dependent formula drives rotating speed limited by internal-combustion engine rotational speed, and car chamber thermic load is large; Electric air-conditioning system on electric automobile is using battery as energy source, and driver part that can not be using internal combustion engine as air-conditioning, adopts motor compressor, and car chamber thermic load is little.The variation of these aspects makes electric automobile air-conditioning system can not all adopt air-conditioning system parts and control method in the past.
Summary of the invention
The object of the present invention is to provide a kind of control method and device of electric automobile convertible frequency air-conditioner, adopt a controller that meets CAN2.0B agreement to control the running of air-conditioning, can carry out resource-sharing and information mutual communication by CAN bus with other system in car.Method for controlling frequency conversion reduces system energy consumption, improves comfortableness.
To achieve these goals, solution of the present invention is:
A kind of electric automobile electric air-conditioning method for controlling frequency conversion, comprises the following steps:
1, in system, be provided with the air-conditioner controller module of the first single-chip microcomputer and the large parts of air-conditioner controller panel two with second singlechip, air-conditioning control module and air-conditioner controller panel carry out exchanges data with CAN bus form;
2, air-conditioner controller panel (second singlechip) receives and operation information is converted into control instruction after operation information and sends to air-conditioning control module (the first single-chip microcomputer) by CAN bus;
3, air-conditioning control module receives after control instruction, and control instruction is changed into corresponding control output (as Control output and DA output), and frequency converter gathers also corresponding control compressor, the fan frequency conversion control of these signals; Air-conditioning control module gathers control assembly state and CAN bus state is diagnosed, and realizes the protection to parts with this, realizes air-conditioning system reliability service;
4, air-conditioning control module, air-conditioner controller panel are simultaneously to CAN bus feedback information;
5, air-conditioner controller panel is received after information, is shown by display module.
6, the air-conditioner controller panel Real-time Collection driver operation order in described the 1st step, sends new wind order by CAN bus to air-conditioning control module when detecting after new wind order, and air-conditioning control module is opened aeration device after receiving this order.
When air-conditioning control module collects fault when CAN bus communication fault (as occurred in air-conditioning normal course of operation, compressor pressure is too high, compressor temperature is too high, coil temperature is too high), air-conditioning control module is closed air-conditioning control output, in control panel, show mistake, and show error code.Fault starts air-conditioning switch after solving again, and air-conditioning can normally move.
Described air-conditioning control module, by the temperature of return air inlet for air-conditioner position in temperature acquisition vehicle, realizes the VFC of compressor.Air-conditioner controller panel is by gathering supply voltage, and (as in the time that vehicle power supply voltage continues 5S higher than 32V, Air-Conditioning Control Panel can send and stop output command realizing operating voltage abnormity protection function; In the time that vehicle power supply voltage continues 5S lower than 20V, Air-Conditioning Control Panel can send and stop refrigeration order).
A kind of air conditioning for automobiles intelligent controlling device, comprises air-conditioning control module and air-conditioner controller panel, and wherein Air-Conditioning Control Panel sentence is drawn together:
Push button signalling gathers and display circuit, with the air-conditioning control information of the mode Gather and input of button and carry out information demonstration;
Its input of second singlechip connects panel keyboard circuit is set, and output connects display circuit, and output connects CAN bus transmitting-receiving drive circuit simultaneously, carries out exchanges data with automobile CAN-bus;
Air-conditioning control module comprises:
Its input of the first single-chip microcomputer is connected with CAN bus transmitting-receiving drive circuit and switch Acquisition Circuit, carries out exchanges data with CAN bus, gathers air-conditioning annex state, and its output is connected with relay, power device and DA output circuit; Control output circuit, comprises the relay drive circuit being connected with the first single-chip microcomputer and the outputting circuit for relay being connected with AIR COND RLY Air Conditioner Relay, and air-conditioning annex is controlled.Temperature collection circuit, the temperature at collection automobile air-conditioning air inlet place (car is outer), vehicle air conditioning air outlet place (in car), A/C evaporator coil pipe place; Electric current and voltage Acquisition Circuit, gathers electric automobile air conditioner input voltage, operating current.Drive circuit of indicator, with display system power supply status, CAN bus communication state, high-low pressure state, evaporating state, new wind state and cooling and warming state etc.
Adopt after such scheme, the present invention has following beneficial effect:
First, the present invention is that the CAN bus form based on automobile itself carries out transfer of data, and reliability is very high, very applicable automotive environment.Meanwhile, meet CAN2.0B agreement, can carry out resource-sharing and information mutual communication with the CAN module of other system in car.Adopt the communication of CAN bus form, can reduce in existing air conditioner controlling technology by 80% wire harness, greatly reduce wire harness cost, reduce potential safety hazard.
Secondly, the present invention adopts compressor variable frequency control, changes and carries out output frequency adjustment according to the difference of car room temperature and design temperature, changes compressor rotary speed, at hour reduction rotating speed of thermic load, effectively reduces the overshoot of car room temperature, more energy-conservation.
Figure of description
Fig. 1 is System Implementation wiring diagram of the present invention;
Fig. 2 is preferred embodiment module outside drawing of the present invention;
Fig. 3 is the circuit diagram of air-conditioner controller panel in preferred embodiment of the present invention;
Fig. 4 is the circuit diagram that preferred embodiment hollow of the present invention is adjusted control module.
Detailed description of the invention
By reference to the accompanying drawings, the present invention is further explained in detail.
As shown in Figure 1, the present invention comprises two large critical pieces, and air-conditioning control module 1 and air-conditioner controller panel 2 adopt automobile CAN communication bus to connect between the two.The detailed connection principle of system as shown in the figure.
As shown in Figure 3, air-conditioner controller panel comprises second singlechip 3, and the keyboard circuit 4 being connected with it, display circuit 5, the 2nd CAN bus transmission circuit 6.
As shown in Figure 4, air-conditioning control module comprises the first single-chip microcomputer 8, and the first bus CAN transmission circuit 9 being connected with it, temperature, voltage, current collection circuit 10, failure detector circuit 11, outputting circuit for relay 12, indicator light circuit 13.
In conjunction with Fig. 3, second singlechip 3 is selected the F0888 of Renesas, has 64 pins, and operating voltage is+5V to be furnished with a power circuit 7, by the operating voltage of convert to+5V of the DC voltage on automobile, for second singlechip 3 is powered.Keyboard circuit 4 is to adopt 10 buttons to be connected in parallel and to form, and is connected to wherein Pin17-26 on second singlechip 3 upper, gather user to the operation push-button information of air-conditioning in second singlechip 3.
The 2nd CAN bus transmission circuit 6 is the circuit that adopt CAN transceiver to form, the Pin1 of CAN transceiver, and 4 are connected to the Pin28 of second singlechip 3, on 29, the Pin6 of CAN transceiver, 7 access automobile CAN-bus.The 2nd CAN bus transmission circuit 6 is exactly to make second singlechip 3 and the first single-chip microcomputer 8 and car load network to carry out exchanges data with automobile CAN-bus form.
The new wind signal input circuit of vehicle control is also that keyboard circuit 4 is linked in second singlechip 3, in the time having new wind signal input, producing signal is delivered in second singlechip 3, then second singlechip 3 receives after this signal, this signal is sent to CAN bus, air-conditioning control module 1 is opened the aeration device on automobile after receiving this order.
In conjunction with Fig. 4, the first single-chip microcomputer 8 adopts auspicious Sa F0881 chip to form, and is equally also furnished with power circuit 14, for the first single-chip microcomputer 8 provides operating voltage.Meanwhile, in order to make the CAN bus communication of air-conditioning control module 2, be connected with CAN bus transmission circuit 9 in the same mode of second singlechip 3.Voltage, temperature collection circuit 10 are to gather voltage signal mode to gather, Temp-IN (vehicle air conditioning return air inlet place) temperature, Temp-OUT (outside vehicle) temperature, Temp-DFl (coil pipe) temperature, send the signal of collection to first single-chip microcomputer 8, like this can comprehensive understanding vehicle condition, grasp at any time trend, situation in car is carried out to VFC.
In the time vehicle interior temperature > design temperature being detected, press refrigeration switch, air-conditioning enters refrigerating state; The computing formula of frequency is: f=f
min+ (Tr-Ts) * (f
max-f
min)/8.
Indicator light circuit 13 is multiple light emitting diodes branch roads that form in parallel, comprises communication failure lamp, frequency converter 1 trouble light, frequency converter 2 trouble lights, frequency converter 3 trouble lights etc.Indicator light circuit 13 is exactly for each duty is clearly represented.
Control method to automobile of the present invention is as follows:
First on keyboard circuit 4, the control signal arranging is wanted in input, then flow in second singlechip 3, produce command adapted thereto to CAN bus, by CAN bus transfer, the first single-chip microcomputer 8 receives after this instruction, change into concrete operational order to outputting circuit for relay 12 or frequency converter output circuit, then change by outputting circuit for relay 12 or transducer control circuit control air conditioning for automobiles.
Simultaneously, Real-Time Monitoring air conditioner fresh air signal input on second singlechip 3, under running state of air conditioner, produce new wind signal, this signal is by sending to CAN bus on second singlechip 3, and air-conditioning control module 2 is opened the aeration device on automobile after receiving this order.
Real-Time Monitoring air conditioner ventilation signal input on second singlechip 3, produce ventilation signal, detect air force signal, by these two signals, by sending to CAN bus on second singlechip 3, air-conditioning control module 2 is opened the ventilation unit on automobile and is set corresponding frequency converter frequency after receiving this order.
Real-Time Monitoring air-conditioning heating signal input on second singlechip 3, generation heats signal, signal is by sending to CAN bus on second singlechip 3, the first single-chip microcomputer receives the relation of inspection vehicle room temperature and design temperature after signal, start reversal valve when meeting while heating condition, output circuit receives order and opens the heating combined equipment on automobile later and set corresponding frequency converter frequency.
The first single-chip microcomputer 8 voltages, temperature collection circuit 10 are to gather voltage signal mode to gather, Temp-IN (vehicle air conditioning return air inlet place) temperature, Temp-OUT (outside vehicle) temperature, Temp-DFl (coil pipe) temperature, send the signal of collection to first single-chip microcomputer 8, like this can comprehensive understanding vehicle condition, grasp at any time trend, situation in car is carried out to VFC.
In addition, in the present invention, be also provided with fault reply step, when occurring in air-conditioning normal course of operation that compressor pressure is too high, compressor temperature is too high, coil temperature is too high, when CAN bus communication fault, the first single-chip microcomputer cuts out all air supply rates except controller and controller panel, shows mistake in control panel.Pin fault diagnosis button, display screen shows error code.Fault starts air-conditioning switch after solving again, and air-conditioning can normally move.
Claims (5)
1. a control method that is applicable to electric automobile frequency-conversion air-conditioning system, comprises the following steps:
in system, be provided with the air-conditioner controller module of the first single-chip microcomputer and the large parts of air-conditioner controller panel two with second singlechip, air-conditioning control module and air-conditioner controller panel carry out exchanges data with CAN bus form;
air-conditioner controller panel (second singlechip) receives and operation information is converted into control instruction after operation information and sends to air-conditioning control module (the first single-chip microcomputer) by CAN bus;
air-conditioning control module receives after control instruction, and control instruction is changed into corresponding control output (as control relay output and DA output), and frequency converter gathers these signals and realizes associated compressors, fan frequency conversion control;
air-conditioning control module gathers control assembly state and CAN bus state is diagnosed, and realizes the protection to parts with this, realizes air-conditioning system reliability service;
air-conditioning control module, air-conditioner controller panel are simultaneously to CAN bus feedback information;
air-conditioner controller panel is received after information, is shown by display module;
by upper computer software, air-conditioner controller panel is carried out to parameter calibration, to adapt to the multiple demand of different automobile types.
2. a kind of electric automobile electric air-conditioning control method as claimed in claim 1, it is characterized in that: the new wind command signal of second singlechip Real-Time Monitoring vehicle control in described the 1st step, when this signal being detected, send new wind order by CAN bus to air-conditioning control module, air-conditioning control module is opened the new wind reversing arrangement on automobile after receiving this order.
3. a kind of electric automobile electric air-conditioning control method as claimed in claim 1, it is characterized in that: in the first described single-chip microcomputer, collected fault reply step, when occurring in air-conditioning normal course of operation that compressor pressure is too high, compressor temperature is too high, coil temperature is too high, when CAN bus communication fault, the first single-chip microcomputer closing control output shows mistake in control panel.Pin panel diagnosis button, display screen shows error code.Fault starts air-conditioning switch after solving again, and air-conditioning can normally move.
4. a kind of electric automobile electric air-conditioning control method as claimed in claim 1, it is characterized in that: the first described single-chip microcomputer is by the temperature of return air inlet for air-conditioner position in temperature collection circuit collection vehicle, with the compare operating frequency of calculative determination compressor and condensation fan of panel design temperature.
5. a kind of electric automobile electric air-conditioning control method as claimed in claim 1, it is characterized in that: described air-conditioner controller module gathers automobile return air inlet for air-conditioner place temperature, A/C evaporator coil pipe place temperature, by CAN bus, temperature signal is flowed to the first single-chip microcomputer; Gather electric automobile air conditioner input voltage, input current, by CAN bus, voltage and current signal is passed to the first single-chip microcomputer.Indicator light circuit, picks out light emitting diode from the first single-chip microcomputer, with display power supply state, CAN bus communication state, high-low pressure state, evaporating state, new wind state and cooling and warming state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005717.0A CN103912961A (en) | 2013-01-08 | 2013-01-08 | CAN (Controller Area Network) bus based electric motor coach electromotive air conditioning technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005717.0A CN103912961A (en) | 2013-01-08 | 2013-01-08 | CAN (Controller Area Network) bus based electric motor coach electromotive air conditioning technology |
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| CN103912961A true CN103912961A (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310005717.0A Pending CN103912961A (en) | 2013-01-08 | 2013-01-08 | CAN (Controller Area Network) bus based electric motor coach electromotive air conditioning technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106569452A (en) * | 2016-11-04 | 2017-04-19 | 无锡市普欧电子有限公司 | Bus air conditioning system based on CAN control |
| CN106671727A (en) * | 2015-11-06 | 2017-05-17 | 杭州优倍科技有限公司 | Electric vehicle air conditioner controller and control method |
| CN107415640A (en) * | 2017-07-27 | 2017-12-01 | 北京新能源汽车股份有限公司 | Electric heater control method and system and electric heater controller |
| CN108776469A (en) * | 2018-06-26 | 2018-11-09 | 北京长城华冠汽车技术开发有限公司 | Vehicle mounted communication module monitoring system and monitoring method |
| CN112082797A (en) * | 2020-09-14 | 2020-12-15 | 深圳宇信和科技有限公司 | Automobile air conditioner test system and test method based on CAN interface |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106671727A (en) * | 2015-11-06 | 2017-05-17 | 杭州优倍科技有限公司 | Electric vehicle air conditioner controller and control method |
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| CN107415640A (en) * | 2017-07-27 | 2017-12-01 | 北京新能源汽车股份有限公司 | Electric heater control method and system and electric heater controller |
| CN108776469A (en) * | 2018-06-26 | 2018-11-09 | 北京长城华冠汽车技术开发有限公司 | Vehicle mounted communication module monitoring system and monitoring method |
| CN112082797A (en) * | 2020-09-14 | 2020-12-15 | 深圳宇信和科技有限公司 | Automobile air conditioner test system and test method based on CAN interface |
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Application publication date: 20140709 |