CN101949572A - Method and device for intelligently controlling air-conditioner of automobile - Google Patents
Method and device for intelligently controlling air-conditioner of automobile Download PDFInfo
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- CN101949572A CN101949572A CN2010102915933A CN201010291593A CN101949572A CN 101949572 A CN101949572 A CN 101949572A CN 2010102915933 A CN2010102915933 A CN 2010102915933A CN 201010291593 A CN201010291593 A CN 201010291593A CN 101949572 A CN101949572 A CN 101949572A
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Abstract
The invention mainly discloses a method and a device for intelligently controlling an air-conditioner of an automobile. The device comprises two main parts of an air-conditioner control module and an air-conditioner control panel, a CAN bus receiving-transmission drive circuit is also included, and the air-conditioner control module and the air-conditioner control panel exchange data in the CAN bus mode. air-conditioner control information is input into the air-conditioner control panel and then sent to a first singlechip, and then sent into the CAN bus; and after receiving a control command, the air-conditioner control module converts the control command into the corresponding executive command and transmits the executive command to a relay control output circuit, and the relay control output circuit carries out the executive command to make an air-conditioner relay operate, so that the state change of the air-conditioner is realized. A second singlechip simultaneously feeds back the change information of the air-conditioner to the CAN bus and after receiving the change information of the air-conditioner, the first single-chip microcomputer displays the change information of the air-conditioner by a display circuit. The device controls the operation of the automobile air-conditioner by adopting the controller meeting the SAE J1939 protocol so as to form closed loop control, and the device can share resources and information with the CAN modules of other systems of the automobile.
Description
Technical field
The present invention relates to air conditioning for automobiles control, particularly relevant with device with a kind of air conditioning for automobiles intelligence control method.
Background technology
Existing air conditioning for automobiles electrical control industry roughly has two kinds of present situations:
One, air conditioning for automobiles electrical control form substantially all is to adopt tens control wire harness at present, control by Air-Conditioning Control Panel manual operation and temperature air-conditioner control box (relay box) is controlled, reach control air-conditioning evaporation fan, condensation fan, compressor clutch.This control line beam quality trouble point heavy, that may occur is many, wire harness cost height, inconvenience when installing an air-conditioner, control panel and when controlling wire harness and breaking down air-conditioning can not use.
Two, at present a small amount of air conditioning for automobiles adopt bus form control mode also have a following problems:
1, the bus of Cai Yonging belongs to open loop control, can not truly reflect the running status of air-conditioning system, even may cause system out of control;
2, the CAN communications protocol of Cai Yonging is not the popular SAE J1939 agreement (car gage serial protocol) of passenger vehicle, can't realize resource-sharing and information mutual communication with the CAN module of other system in the car, for example: unified fault diagnosis.
Based on the SAE J1939 agreement that adopts in the automobile industry, the inventor designs a kind of air conditioning for automobiles intelligence control method and device, solves the problem of above-mentioned existence, and this case produces thus.
Summary of the invention
The object of the present invention is to provide a kind of air conditioning for automobiles intelligence control method and device, adopt a controller that meets SAE J1939 agreement to control the running of air conditioning for automobiles, form closed-loop control, can carry out resource-sharing and information mutual communication with the CAN module of other system in the car.
To achieve these goals, solution of the present invention is:
A kind of air conditioning for automobiles intelligence control method may further comprise the steps:
1, be provided with the air-conditioning control module of first single-chip microcomputer and have the Air-Conditioning Control Panel two big parts of second singlechip in automobile, cooperate CAN bus transmitting-receiving drive circuit, air-conditioning control module and Air-Conditioning Control Panel carry out exchanges data with the CAN bus form;
2, in the control information of Air-Conditioning Control Panel input air-conditioning, this information is sent into first single-chip microcomputer, changes into control instruction by first single-chip microcomputer and sends to the CAN bus;
3, after the air-conditioning control module receives control instruction, by second singlechip control instruction is changed into corresponding fill order and control output circuit, carry out AIR COND RLY Air Conditioner Relay work by relay control output circuit, thereby realize the air-conditioning state variation to relay;
4, second singlechip is simultaneously to CAN bus feedback air-conditioning change information;
5, after first single-chip microcomputer is received the feedback information of air-conditioning variation, shown by display circuit.
In described the 2nd step, to after 5 seconds of Air-Conditioning Control Panel shut-down operation, the control instruction that first single-chip microcomputer just will be transformed by the air-conditioning control information of input send to the CAN bus.
The real-time monitor vehicle of first single-chip microcomputer in described the 1st step is controlled new wind signal input, when detecting this signal, sends new wind order by the CAN bus to the air-conditioning control module, and the air-conditioning control module receives the aeration device of opening after this orders on the automobile.
In described the 1st step, second singlechip begins to send raising idling request signal to the CAN bus when the air conditioner condensation blower fan has output, and first single-chip microcomputer receives this request signal, sends to automobile engine and improves the idling order.
Be provided with emergent step in the described second singlechip, when CAN bus communication fault occurs in the air-conditioning normal course of operation, second singlechip automatic control relay control output circuit control air-conditioning enters automatic mode; When CAN bus communication fault occurring before air-conditioning start, the long emergence button of press in the air-conditioning control module 1 second starts automotive air-conditioning system, and enters under the automatic mode and move.
Described second singlechip is controlled the temperature of vehicle interior automatically by the temperature of air-conditioning return air inlet position in the temperature collection circuit collection vehicle; When detecting vehicle interior temperature 〉=2 ℃ design temperature, air-conditioning enters refrigerating state automatically; Through refrigeration after a while, when detecting vehicle interior temperature≤design temperature, air-conditioning enters automatically and stops refrigerating state.
Described second singlechip is gathered supply voltage and air-conditioning generator voltage by voltage collection circuit, when vehicle power supply voltage 〉=32V or≤when 16V continued 5S, Air-Conditioning Control Panel can stop all outputs automatically; When vehicle power supply voltage≤21V continued 5S, Air-Conditioning Control Panel can stop refrigeration output automatically.
A kind of air conditioning for automobiles intelligence controlling device comprises Air-Conditioning Control Panel and air-conditioning control module, and wherein Air-Conditioning Control Panel comprises:
Keyboard circuit is gathered the air-conditioning control information of input in the mode of button;
First single-chip microcomputer, its input connect panel keyboard circuit are set, and output connects display circuit, and output connects CAN bus transmitting-receiving drive circuit simultaneously, carries out exchanges data with automobile CAN-bus;
Display circuit comprises that IO control drives chip, shift register chip, charactron, striation, light emitting diode; IO control drives chip, the shift register chip connects second singlechip, connects in dynamic scan method mode simultaneously to drive charactron, striation and light emitting diode;
The air-conditioning control module comprises:
Second singlechip, its input are connected with the 2nd CAN bus transmitting-receiving drive circuit, carry out exchanges data with the CAN bus, and its output is connected with relay control output circuit;
Relay control output circuit comprises the relay drive circuit that is connected with second singlechip, with the relay output circuit that is connected with AUTOMOTIVE RELAY, and control AUTOMOTIVE RELAY work shape body.
Described Air-Conditioning Control Panel comprises that also vehicle controls new wind signal input circuit, gathers the input of new wind signal in the automobile, and new wind signal is sent to the air-conditioning control module by the CAN bus.
Described Air-Conditioning Control Panel comprises that also the idling that is connected with first single-chip microcomputer promotes control circuit.
Described Air-Conditioning Control Panel also comprises the keyboard back light circuit, is connected with first single-chip microcomputer, for keyboard circuit provides demonstration backlight.
Described air-conditioning control module also comprises:
Temperature collection circuit, the temperature at collection automobile air-conditioning return air inlet place, air outlet place, an A/C evaporator fin left side, the right air outlet of A/C evaporator fin place converts it into temperature signal and flows to second singlechip;
Voltage collection circuit, the voltage of collection automotive power supply voltage, air-conditioning generator converts it into voltage signal and flows to second singlechip;
The switching value input circuit, gather the low tension switch signal on the low pressure pipeline of high-voltage switch gear signal on the pressure piping of emergency button signal, A/C evaporator inside of air-conditioning control module, A/C evaporator inside, and above-mentioned three kinds of switching value signals are delivered to second singlechip.
Indicator light circuit picks out light emitting diode from second singlechip, with display power supply state, CAN bus communication state, high-low pressure state, evaporating state, new wind state and cooling and warming state.
After adopting such scheme, the present invention has following beneficial effect:
At first, the CAN bus form that the present invention is based on this province of automobile carries out transfer of data, and reliability is very high, very suitable automotive environment.Simultaneously, meet the CAN2.0B agreement, compatible existing SAE J1939 agreement really forms closed-loop control fully, can carry out resource-sharing and information mutual communication with the CAN module of other system in the car.Adopt the communication of CAN bus form, can reduce in the existing air conditioner controlling technology by 80% wire harness, reduce the wire harness cost greatly, reduce potential safety hazard.
Secondly, all the other are multiple functional among the present invention, can realize the idle speed control of automobile engine in conjunction with automotive air-conditioning system, have defrosting temperature two-way look facility, also have vehicle power supply and air-conditioning generator voltage look facility in addition, in time understand the situation of vehicle.
In addition, also have many human oriented designs among the present invention,, make and also can see keyboard clearly,, can know to show the air-conditioning work state, make things convenient for the driver in time to grasp again such as multiple indicator light circuit in the place of insufficient light such as the keyboard back light circuit.
Figure of description
Fig. 1 is a preferred embodiment module diagram of the present invention;
Fig. 2 is the circuit diagram of Air-Conditioning Control Panel in the preferred embodiment of the present invention;
Fig. 3 is the circuit diagram of preferred embodiment hollow regulation and control molding piece of the present invention.
The specific embodiment
In conjunction with the accompanying drawings, the present invention is done be further explained in detail.
As shown in Figure 1, comprise two big critical pieces among the present invention, Air-Conditioning Control Panel 1 and air-conditioning control module 2 adopt the automobile CAN communication bus to connect between the two.
Wherein comprise first single-chip microcomputer 11 in the Air-Conditioning Control Panel 1, and the keyboard circuit 12 that is connected with it, display circuit 13, a CAN bus transmission circuit 14, vehicle are controlled new wind signal input circuit 15, idling promotes control circuit 16.
Air-conditioning control module 2 comprises second singlechip 21, and the second bus CAN transmission circuit 22, temperature collection circuit 23, voltage collection circuit 24, switching value input circuit 25, indicator light circuit 26, the relay output circuit 27 that are connected with it.
As shown in Figure 2, first single-chip microcomputer 11 is selected the PIC18F2580 of U.S. Microchip company for use, has 28 pins, operating voltage is+5V, be furnished with a power circuit 17, with on the automobile+DC voltage of 24V converts to+operating voltage of 5V, is 11 power supplies of first single-chip microcomputer.
The one CAN bus transmission circuit 14 is the circuit that adopt the CAN transceiver to form, and the Pin1 of CAN transceiver, 4 is connected on the Pin23,24 of first single-chip microcomputer 11, and the Pin6 of CAN transceiver, 7 inserts automobile CAN-bus.The one CAN bus transmission circuit 14 is exactly to make the single-chip microcomputer 11 of winning can carry out exchanges data with the automobile CAN-bus form with second singlechip 21.
Vehicle is controlled new wind signal input circuit 15 positions from secondary instrument desk before automobile and is linked into the 28th pin common i/o port first single-chip microcomputer 11, detects input signal by the optocoupler detection mode.When air-conditioning is in closed condition, if vehicle dormer window exhaust blower switch opens, then new wind control signal input.When new wind signal is imported, photoelectrical coupler can be opened circuit turn-on, produce signal and be delivered in first single-chip microcomputer 11, after first single-chip microcomputer 11 receives this signal then, then this signal is sent to the CAN bus, air-conditioning control module 2 receives the aeration device of opening after this orders on the automobile.
Idling promotes the 27th pin common i/o port that control circuit 16 is connected first single-chip microcomputer 11, connect the control end on the automobile engine simultaneously, second singlechip 21 begins to send raising idling request signal to the CAN bus when the air conditioner condensation blower fan has output, after first single-chip microcomputer 11 receives request signal, with regard to the relay in the idling lifting control circuit 16, the control signal that produces the idling lifting is given automobile engine, make engine promote idling, engine speed can be promoted to (according to different auto vendors data difference) about more than 700 rev/min.Because the air conditioner refrigerating amount is relevant with the vehicle motor rotating speed, the air conditioner refrigerating amount is had a bit improve, the air-conditioning generator speed is improved, satisfy the power consumption of idle call electrical equipment.
In conjunction with Fig. 3, second singlechip 21 is that the chip identical with first single-chip microcomputer 11 constitutes, and equally also is furnished with power circuit 28, for second singlechip 21 provides operating voltage.Simultaneously, in order to make the CAN bus communication of air-conditioning control module 2, be connected with the 2nd CAN bus transmission circuit 22 in first single-chip microcomputer, 11 same modes.
When detecting vehicle interior temperature 〉=design temperature, air-conditioning enters refrigerating state automatically; Through refrigeration after a while, when detecting vehicle interior temperature≤design temperature, air-conditioning enters automatically and stops refrigerating state.
When vehicle power supply voltage 〉=32V or≤(continue 5S) during 16V, Air-Conditioning Control Panel can stop all outputs automatically; Air-Conditioning Control Panel can stop refrigeration output (condensation fan, compressor clutch output) automatically (to continue 5S) when vehicle power supply voltage≤21V.The purpose of doing like this is in order to prevent following bad phenomenon: when supply voltage 〉=32V, idle call electrical equipment (condensation fan, evaporation fan, compressor clutch etc.) current ratio is bigger, causes the electrical appliance life-span to reduce easily.When supply voltage≤21V, the suction-combining force of compressor clutch causes clutch friction easily inadequately and produces high temperature, and clutch coil is burnt.When supply voltage≤16V, the suction-combining force of relay coil causes the relay contact sparking inadequately easily, causes relay damaged.
Switching value input circuit 25 is that three road optocoupler testing circuits constitute, and what gather respectively is low tension switch amount signal on the low pressure pipeline of high-voltage switch gear amount signal, A/C evaporator inside on the pressure piping of switching value signal, A/C evaporator inside of emergence button.When above-mentioned three class signals, the closed signal that produces of photoelectrical coupler is transported in the second singlechip 21.When receiving the switching value signal of emergence button, second singlechip 21 control air-conditioning automatically enters in the automatic mode as emergency measure.After receiving high pressure and low tension switch amount signal, carry out software redundancy by second singlechip 21 and handle,, promptly close air-conditioning compressor if handle the back signal effectively then enter high-low pressure fault alarm handling process.If high voltage fault, condensation fan is closed the back delay at compressor and was closed in 10 seconds; If low voltage failure, condensation fan is closed the back delay at compressor and was closed in 2 seconds.So, reach the refrigeration purpose, and in air-conditioning system, designed high-voltage switch gear and low tension switch respectively in order to guarantee air-conditioning system pressure security operate as normal.If air-conditioning system pressure is too high, can cause refrigeration not good, main is to cause the air-conditioning system unsafe factor.If air-conditioning system pressure is too low, can cause compressor damage.
Control method to automobile of the present invention is as follows:
At first the control signal that is provided with is wanted in input on keyboard circuit 12, flow to then in first single-chip microcomputer 11, produce command adapted thereto and give the CAN bus, by the CAN bus transfer, after second singlechip 21 receives this instruction, change into concrete operational order and give relay output circuit 27, change by relay output circuit 27 control air conditioning for automobiles then, second singlechip 21 sends one and finishes signal to first single-chip microcomputer 11 simultaneously, after first single-chip microcomputer 11 is received this feedback signal, on display circuit 13, shown, formed a closed-loop control system.
In order to prevent button error under automotive environment, after 12 operations stop 5 seconds to keyboard circuit, just first single-chip microcomputer 11 can send to command adapted thereto the CAN bus.The misoperation of air-conditioning in setting up procedure effectively avoided in this measure, significantly reduces the bus burden.
Simultaneously, the new wind signal input of monitoring automobile in real time when air-conditioning is in off status, produces new wind signal on first single-chip microcomputer 11, this signal is by sending to the CAN bus on first single-chip microcomputer 11, and air-conditioning control module 2 receives the aeration device of opening after this orders on the automobile.
Can produce an idling at second singlechip 21 when condensation fan output is arranged and promote request, then this request signal be sent in first single-chip microcomputer 11, first single-chip microcomputer 11 produces signal and promotes control circuit 16 to idling, controls the raising of engine idle thus.
The voltage (being the voltage of air-conditioning generator) that second singlechip 21 collection automobile+24V power supply voltages, Mot Volt select, Temp-IN (vehicle air conditioning return air inlet place) temperature, Temp-DF1 (defrosting temperature 1: temperature and Temp-DF2 (defrosting temperature 2: the temperature right air outlet of A/C evaporator fin place) air outlet place, an A/C evaporator fin left side), send the signal of gathering to second singlechip 21, like this can comprehensive understanding vehicle condition, at any time grasp trend, situation in the car is carried out Based Intelligent Control.
In addition, also be provided with emergency measure among the present invention, set up emergence button in air-conditioning control module 2, when in the operation of air conditioner process, the CAN bus communication produces fault, then communication light flicker, and second singlechip 21 automatic control air-conditionings enter in the automatic mode then.When CAN bus communication fault occurring before air-conditioning start, the long emergence button of press in the air-conditioning control module 21 second starts automotive air-conditioning system, and enters under the automatic mode and move.Emergency measure is flexible, adapts to all kinds of accidents.
Claims (10)
1. air conditioning for automobiles intelligence control method is characterized in that: may further comprise the steps:
1., in automobile, be provided with the air-conditioning control module of first single-chip microcomputer and have the Air-Conditioning Control Panel two big parts of second singlechip, cooperate CAN bus transmitting-receiving drive circuit, air-conditioning control module and Air-Conditioning Control Panel carry out exchanges data with the CAN bus form;
2., in the control information of Air-Conditioning Control Panel input air-conditioning, this information is sent into first single-chip microcomputer, changes into control instruction by first single-chip microcomputer and sends to the CAN bus;
3., after the air-conditioning control module receives control instruction, by second singlechip control instruction is changed into corresponding fill order and control output circuit, carry out AIR COND RLY Air Conditioner Relay work by relay control output circuit, thereby realize the air-conditioning state variation to relay;
4., second singlechip is simultaneously to CAN bus feedback air-conditioning change information;
5., after first single-chip microcomputer receives the feedback information that air-conditioning changes, shown by display circuit.
2. a kind of air conditioning for automobiles intelligence control method as claimed in claim 1, it is characterized in that: in described the 2nd step, to after 5 seconds of Air-Conditioning Control Panel shut-down operation, the control instruction that first single-chip microcomputer just will be transformed by the air-conditioning control information of input send to the CAN bus.
3. a kind of air conditioning for automobiles intelligence control method as claimed in claim 1, it is characterized in that: the real-time monitor vehicle of first single-chip microcomputer in described the 1st step is controlled new wind signal input, when detecting this signal, send new wind order by the CAN bus to the air-conditioning control module, the air-conditioning control module receives the aeration device of opening after this orders on the automobile.
4. a kind of air conditioning for automobiles intelligence control method as claimed in claim 1, it is characterized in that: in described the 1st step, second singlechip begins to send raising idling request signal to the CAN bus when the air conditioner condensation blower fan has output, first single-chip microcomputer receives this request signal, sends to automobile engine and improves the idling order.
5. a kind of air conditioning for automobiles intelligence control method as claimed in claim 1, it is characterized in that: be provided with emergent step in the described second singlechip, when CAN bus communication fault occurs in the air-conditioning normal course of operation, second singlechip automatic control relay control output circuit control air-conditioning enters automatic mode; When CAN bus communication fault occurring before air-conditioning start, the long emergence button of press in the air-conditioning control module 1 second starts automotive air-conditioning system, and enters under the automatic mode and move.
6. a kind of air conditioning for automobiles intelligence control method as claimed in claim 1 is characterized in that: described second singlechip is controlled the temperature of vehicle interior automatically by the temperature of air-conditioning return air inlet position in the temperature collection circuit collection vehicle; When detecting vehicle interior temperature 〉=2 ℃ design temperature, air-conditioning enters refrigerating state automatically; Through refrigeration after a while, when detecting vehicle interior temperature≤design temperature, air-conditioning enters automatically and stops refrigerating state.
7. a kind of air conditioning for automobiles intelligence control method as claimed in claim 1, it is characterized in that: described second singlechip is gathered supply voltage and air-conditioning generator voltage by voltage collection circuit, when vehicle power supply voltage 〉=32V or≤when 16V continued 5S, Air-Conditioning Control Panel can stop all outputs automatically; When vehicle power supply voltage≤21V continued 5S, Air-Conditioning Control Panel can stop refrigeration output automatically.
8. air conditioning for automobiles intelligence controlling device, it is characterized in that: comprise Air-Conditioning Control Panel and air-conditioning control module, wherein Air-Conditioning Control Panel comprises:
Keyboard circuit is gathered the air-conditioning control information of input in the mode of button;
First single-chip microcomputer, its input connect panel keyboard circuit are set, and output connects display circuit, and output connects CAN bus transmitting-receiving drive circuit simultaneously, carries out exchanges data with automobile CAN-bus;
Display circuit comprises that IO control drives chip, shift register chip, charactron, striation, light emitting diode; IO control drives chip, the shift register chip connects second singlechip, connects in dynamic scan method mode simultaneously to drive charactron, striation and light emitting diode;
The air-conditioning control module comprises:
Second singlechip, its input are connected with the 2nd CAN bus transmitting-receiving drive circuit, carry out exchanges data with the CAN bus, and its output is connected with relay control output circuit;
Relay control output circuit comprises the relay drive circuit that is connected with second singlechip, with the relay output circuit that is connected with AUTOMOTIVE RELAY, and control AUTOMOTIVE RELAY work shape body.
9. a kind of air conditioning for automobiles intelligence controlling device as claimed in claim 8, it is characterized in that: described Air-Conditioning Control Panel also comprises
Vehicle is controlled new wind signal input circuit, gathers the input of new wind signal in the automobile, and new wind signal is sent to the air-conditioning control module by the CAN bus;
The idling that is connected with first single-chip microcomputer promotes control circuit;
The keyboard back light circuit is connected with first single-chip microcomputer, for keyboard circuit provides demonstration backlight.
10. a kind of air conditioning for automobiles intelligence controlling device as claimed in claim 8 is characterized in that: described air-conditioning control module also comprises:
Temperature collection circuit, the temperature at collection automobile air-conditioning return air inlet place, air outlet place, an A/C evaporator fin left side, the right air outlet of A/C evaporator fin place converts it into temperature signal and flows to second singlechip;
Voltage collection circuit, the voltage of collection automotive power supply voltage, air-conditioning generator converts it into voltage signal and flows to second singlechip;
The switching value input circuit, gather the low tension switch signal on the low pressure pipeline of high-voltage switch gear signal on the pressure piping of emergency button signal, A/C evaporator inside of air-conditioning control module, A/C evaporator inside, and above-mentioned three kinds of switching value signals are delivered to second singlechip;
Indicator light circuit picks out light emitting diode from second singlechip, with display power supply state, CAN bus communication state, high-low pressure state, evaporating state, new wind state and cooling and warming state.
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| CN 201010291593 CN101949572B (en) | 2010-09-13 | 2010-09-13 | Method and device for intelligently controlling air-conditioner of automobile |
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| CN 201010291593 CN101949572B (en) | 2010-09-13 | 2010-09-13 | Method and device for intelligently controlling air-conditioner of automobile |
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| CN103912961A (en) * | 2013-01-08 | 2014-07-09 | 北京理工大学 | CAN (Controller Area Network) bus based electric motor coach electromotive air conditioning technology |
| CN103998266A (en) * | 2011-12-15 | 2014-08-20 | 株式会社电装 | Vehicle air-conditioning device |
| CN104110796B (en) * | 2014-07-23 | 2017-01-11 | 金龙联合汽车工业（苏州）有限公司 | Intelligent control method of air-conditioner |
| 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 |
| CN107776511A (en) * | 2016-08-31 | 2018-03-09 | 湖南中车时代电动汽车股份有限公司 | Automotive controls assembly |
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| CN108132665A (en) * | 2017-12-27 | 2018-06-08 | 威马智慧出行科技（上海）有限公司 | For the Vehicular communication system and electric vehicle of electric vehicle |
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| CN110203034A (en) * | 2019-06-10 | 2019-09-06 | 上海加冷松芝汽车空调股份有限公司 | Car air-conditioner detection circuit |
| CN110749030A (en) * | 2019-10-29 | 2020-02-04 | 益阳欣达天马电器设备制造有限公司 | Detection device and method for high-low voltage switch of air conditioner |
| CN111951503A (en) * | 2020-08-25 | 2020-11-17 | 芜湖联诺电器有限公司 | Fuel oil burglar alarm |
| CN112406466A (en) * | 2020-11-18 | 2021-02-26 | 珠海格力电器股份有限公司 | Equipment fault processing device and method and air conditioner |
| CN112406466B (en) * | 2020-11-18 | 2022-06-14 | 珠海格力电器股份有限公司 | Equipment fault processing device and method and air conditioner |
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