CN114857741A - Air conditioning system with fault diagnosis and emergency starting functions and control method thereof - Google Patents
Air conditioning system with fault diagnosis and emergency starting functions and control method thereof Download PDFInfo
- Publication number
- CN114857741A CN114857741A CN202210555372.5A CN202210555372A CN114857741A CN 114857741 A CN114857741 A CN 114857741A CN 202210555372 A CN202210555372 A CN 202210555372A CN 114857741 A CN114857741 A CN 114857741A
- Authority
- CN
- China
- Prior art keywords
- input
- main controller
- air conditioner
- output module
- temperature sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003745 diagnosis Methods 0.000 title claims abstract description 35
- 238000004378 air conditioning Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 28
- 230000033228 biological regulation Effects 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000007791 dehumidification Methods 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 230000006698 induction Effects 0.000 description 22
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/37—Resuming operation, e.g. after power outages; Emergency starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
An air conditioning system with fault diagnosis and emergency starting functions comprises a main controller, a temperature signal input module, a valve control output module, a fan speed regulation control input/output module, a pressure sensing switch signal input/output module and a strong current control output module. Each control module is integrated into the main controller or is connected to the main controller through a circuit, and each module is connected with the corresponding control component through an electric wire to jointly form an air conditioner fault diagnosis system. The external part transmits instructions to the main controller through the remote controller, and the main controller makes corresponding adjustment on circuit control according to the instructions sent by the remote controller. The invention realizes the rapid diagnosis of the air conditioner fault, and when the non-main component has a fault, the remote controller sends an instruction to the main controller to shield the relevant fault, thereby realizing the emergency starting of the air conditioner. When encountering various faults, the system can automatically judge whether to continuously execute an emergency starting scheme, so that the user can enjoy the comfort brought by the air conditioner under the safe working condition.
Description
Technical Field
The invention relates to an air conditioning system with fault diagnosis and emergency starting and a method thereof, in particular to an air conditioning system which can ensure that an air conditioner can normally operate by using an emergency starting function when a user encounters an air conditioning fault.
Background
In hot summer or cold winter, the air conditioner is an essential household appliance for thousands of households. The air conditioner is popularized at present, the service life of the air conditioner is as long as 10 years, an air conditioner outdoor unit is generally installed outdoors, and parts or circuit boards are easy to wear and age due to long-term wind blowing and sunshine. Summer and winter are seasons with the highest air conditioner use frequency, the number of users using the air conditioner is the largest, after-sales maintenance personnel of air conditioner dealers are limited, a large number of fault air conditioners cannot be maintained in time, but the temperature in rooms in hot summer and cold winter causes extreme discomfort to human bodies, normal work or rest in rooms without the air conditioners is difficult, and the problem cannot be solved even when air conditioner faults happen suddenly at night.
At present, when a user encounters an air conditioner fault, the only method is to dial a telephone of an air conditioner dealer to wait for a maintenance engineer to get on the door for resolution, the user may need to wait for 3-5 days in a busy maintenance season, if the user needs to replace accessories, the maintenance engineer needs to wait for several days after getting on the door, a long maintenance period is achieved, the user is suffering, if one air conditioner has a fault diagnosis and emergency starting system, the system can be started in an emergency mode when encountering the fault, the system is significant, and the user is not exposed to severe weather in the process of waiting for maintenance.
Disclosure of Invention
The present invention is directed to solve the above problems, and an object of the present invention is to provide an air conditioning system having fault diagnosis and emergency start and a control method thereof.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
an air conditioning system with fault diagnosis and emergency starting comprises a control system and a refrigeration/heat system, wherein the control system comprises a main controller 1, a temperature signal input module 2, a valve control output module 3, a fan speed regulation control input/output module 4, a pressure sensing switch signal input/output module 5 and a strong current control output module 6, the temperature signal input module 2, the valve control output module 3, the fan speed input/output module 4, the pressure sensing switch input/output module 5 and the strong current control input/output module 6 can be integrated into the main controller (1), or a separate I/O module is connected to the main controller (1) through a circuit; the cooling/heating system includes an electronic expansion valve 12, a compressor 18, an indoor evaporator 20, and an outdoor condenser 21; in the refrigerating/heating system, an exhaust port of a compressor 18 is connected with a lower inlet of a four-way valve 13 through a pipeline, an upper outlet of the four-way valve 13 is connected with a suction port of the compressor 18 through a pipeline, a left outlet of the four-way valve 13 is connected with an upper inlet of an indoor evaporator 20 through a pipeline, a lower outlet of the indoor evaporator 20 is connected with an inlet of an electromagnetic expansion valve 12 through a pipeline, an outlet of the electromagnetic expansion valve 12 is connected with a lower inlet of an outdoor condenser 21 through a pipeline, and an upper outlet of the outdoor condenser 21 is connected with a right inlet of the four-way valve 13 through a pipeline;
a first temperature sensor 7 and an auxiliary heating wire 19 are arranged at an air outlet at the left part of the indoor evaporator 20, a second temperature sensor 8 is arranged at the upper part of the indoor evaporator 20, and a first pressure sensing switch 16 is arranged on a pipeline between the outlet at the left part of the four-way valve 13 and the inlet at the upper part of the indoor evaporator 20; a third temperature sensor 9 is arranged at the upper part of the outdoor condenser 21, a fourth temperature sensor 10 is arranged at an air outlet at the right part of the outdoor condenser 21, and a fifth temperature sensor 11 and a second pressure induction switch 17 are sequentially arranged on a pipeline between an outlet at the upper part of the outdoor condenser 21 and an inlet at the right part of the four-way valve 13;
the first temperature sensor 7, the second temperature sensor 8, the third temperature sensor 9, the fourth temperature sensor 10 and the fifth temperature sensor 11 are connected to the temperature signal input module 2 through signal lines; the valve control output module 3 is connected with an electromagnetic expansion valve 12 and a four-way valve 13 through signal lines; the fan rotating speed input/output module 4 is connected with an indoor fan 14 and an outdoor fan 15 through signal lines; the pressure sensing switch input/output module 5 is connected with a first pressure sensing switch 16 and a second pressure sensing switch 17 through signal lines; the strong electric control input/output module 6 is connected with the compressor 18 and the auxiliary heating wire 19 through signal lines.
Further, the main controller 1 includes an input/output module of an air conditioner control unit, such as a remote communication control module, a fresh air control input/output module, a dehumidification control input/output module, etc., and can set the operating state of the air conditioner during emergency starting under different faults according to user requirements.
The main controller 1 is provided with a set value or range of the temperature measured by each temperature sensor for normal operation of the air conditioner, the rotating speed of the fan, the rotating speed of the compressor and codes of different faults; the following codes for emergency start-up may also be provided in the main controller 1 as required:
| code | Instruction content | Code | Instruction content |
| 127 | Default ambient temperature is above 16 deg.C | 128 | The default evaporation temperature is 5 ℃ in summer and 40 ℃ in winter |
| 129 | Defaults to 40 deg.C in summer and 5 deg.C in winter | 1210 | Default compressor discharge temperature 105 deg.C |
| 1211 | Default outdoor ambient temperature 35 deg.C | 1312 | Adjusting the electromagnetic expansion valve to the maximum opening degree |
| 1414 | The indoor fan operates at maximum wind speed | 1415 | The outdoor fan operates at maximum wind speed |
| 1516 | Default compressor suction port low-pressure switch passage | 1517 | Default compressor exhaust port high-pressure switch passage |
| 1618 | Compressor operating at 50Hz | 1619 | Cut off the auxiliary electric heating wire to supply power |
| 2000 | The control system is restored to the initial state |
The above code numbers are only examples and can be adjusted as required.
The invention discloses a control method of an air conditioning system with fault diagnosis and emergency starting, which comprises four fault diagnosis and emergency starting control methods, and specifically comprises the following steps:
when the value of the temperature sensor deviates from the normal value, the control method for fault diagnosis and emergency starting comprises the following steps:
when the temperature signal input module 2 detects that the input values of the first temperature sensor 7, the second temperature sensor 8, the third temperature sensor 9, the fourth temperature sensor 10 and the fifth temperature sensor 11 deviate from the built-in data range of the main controller 1, the main controller 1 controls the air conditioner to actively display corresponding fault codes and carry out shutdown protection; when the first temperature sensor 7 breaks down, the air conditioner cannot run, the main controller 1 cannot detect the temperature of the indoor environment to control the starting and stopping of the air conditioner, if the air conditioner needs to be started in an emergency, 127 codes can be input into the main controller 1 through a remote controller, and the air conditioner starts to execute a command of stopping for 15 minutes after running for 30 minutes; when the second temperature sensor 8 has a fault, the air conditioner can execute low-temperature prevention or high-temperature prevention protection and cannot run, if the emergency start is needed, 128 codes can be input into the main controller 1 through a remote controller, when the air conditioner is in a refrigeration mode in summer, the main controller 1 shields the transmission numerical value of the second temperature sensor 8, a command of defaulting the second temperature sensor 8 to be 5 ℃ is executed, a command of executing the maximum wind speed is sent to the indoor fan 14 by the fan speed regulation control input/output module 3, when the air conditioner is in a heating mode in winter, the main controller 1 shields the transmission numerical value of the second temperature sensor 8, a command of defaulting the second temperature sensor 8 to be 40 ℃ is executed, and a command of executing the maximum wind speed is sent to the indoor fan 14 by the fan speed regulation control input/output module 3; when the third temperature sensor 9 and the fourth temperature sensor 10 have faults, the air conditioner can execute overheat protection and cannot run, if emergency starting is needed, codes 129 and 1210 can be respectively input into the main controller 1 through a remote controller, and a maximum wind speed execution command is sent to the outdoor fan 15 by the fan speed regulation control input/output module 3; when the fifth temperature sensor 11 is failed and the temperature input signal is higher than the set value of the main controller 1, the air conditioner can execute the protection of the compressor exhaust overheating and cannot operate, if emergency starting is needed, codes 1211 can be input into the main controller 1 through a remote controller, and a command of executing the maximum wind speed is sent to the outdoor fan 15 through the fan speed regulation control input/output module 3;
when the fan rotating speed input/output module detects that the fan rotating speed input signal deviates from a normal value, the control method of fault diagnosis and emergency starting comprises the following steps:
when the fan rotating speed input/output module 4 detects that rotating speed input signals of the indoor fan 14 and the outdoor fan 15 deviate from a built-in data range of the main controller 1, the air conditioner actively displays corresponding fault codes and stops the machine for protection; when the indoor fan 14 is in failure, the fan rotating speed input/output module 4 cannot detect a rotating speed input signal of the indoor fan 14, the air conditioner cannot run, if the air conditioner needs to be started in an emergency, a 1414 code can be input to the main controller 1 through a remote controller, the main controller 1 shields the rotating speed input signal of the indoor fan 14, the rotating speed of the indoor fan 14 is defaulted to be normal, the air conditioner continues to run, the indoor fan 14 executes a maximum wind speed command, and in a cooling mode in summer or a heating mode in winter, if the input temperature of the second temperature sensor 8 is lower than a built-in data range of the main controller 1, the air conditioner is forcibly stopped, and the emergency starting command is not executed any more; when the outdoor fan 15 is in fault, the fan rotating speed input/output module 4 cannot detect a rotating speed input signal of the outdoor fan 15, the air conditioner cannot run, if the air conditioner needs to be started in emergency, a 1415 code can be input to the main controller 1 through a remote controller, the main controller 1 shields the rotating speed signal of the outdoor fan 15, the rotating speed of the outdoor fan 15 is defaulted to be normal, the air conditioner continues to run, the outdoor fan 15 executes a maximum wind speed command, and if the temperature input value of the third temperature sensor 9 is lower than the built-in data range of the main controller 1 in a cooling mode in summer or a heating mode in winter, the air conditioner is forcibly stopped and does not execute the emergency starting command any more;
thirdly, when the pressure sensing switch fails to keep a path normally, the control method of fault diagnosis and emergency starting is as follows:
the first pressure induction switch 16 of the air suction port of the compressor and the second pressure induction switch 17 of the air exhaust port of the compressor are always kept in a closed state when the air conditioner is started and closed, if the suction pressure of the compressor is lower than the set pressure value of the first pressure induction switch 16 and the exhaust pressure of the compressor is higher than the set pressure value of the second pressure induction switch 17, the pressure induction switches can automatically cut off the power supply of the air conditioning system, at the moment, after the input/output module 5 of the pressure induction switches detects a power-off signal, the air conditioner can actively display a corresponding fault code and stop the machine for protection, if the air conditioner needs to be started in an emergency, 1516 or 1517 codes can be input into the main controller 1 through a remote controller, the main controller 1 can shield the signals of the first pressure induction switch 16 of the air suction port of the compressor or the second pressure induction switch 17 of the air exhaust port of the compressor, the air conditioner can continuously operate, if the first pressure induction switch 16 and the second pressure induction switch 17 are simultaneously opened, the main controller 1 will be forced to stop, and will not execute the emergency starting command any more; when the first pressure sensing switch 16 is switched off and the detected temperature of the second temperature sensor 8 deviates from the built-in data range of the main controller 1, the air conditioner executes the refrigerant leakage under-voltage protection, forcibly stops the air conditioner and does not execute an emergency starting command any more; when the second pressure sensing switch 17 is open and the detected temperature of the third temperature sensor 9 deviates from the built-in data range of the main controller 1, the air conditioner will execute the overvoltage protection, will forcibly stop the air conditioner, and will not execute the emergency starting command any more.
Fourthly, when the current of the strong electric component is abnormal, the control method of fault diagnosis and emergency starting is as follows:
if the compressor 18 is a variable frequency compressor, when the strong electric control input/output module 6 detects that the rotating speed input signal of the compressor 18 is inconsistent with the power supply frequency, and a step-out fault occurs, the air conditioner cannot operate, if emergency starting is needed, 1618 codes can be input into the main controller 1 through the remote controller, the compressor 18 operates at the frequency of 50Hz, and if the temperature value input by the second temperature sensor 8 deviates from the built-in data range of the main controller 1, the main controller 1 is forced to stop, and the emergency starting command is not executed any more. When the strong current control module 6 detects the overcurrent protection of the auxiliary heating wire 19, the air conditioner cannot run, if the emergency start is needed, a 1619 code can be input into the main controller 1 through the remote controller, the strong current control module 6 cuts off the power supply of the auxiliary heating wire 19, and the air conditioner continues to run.
Further preferably, the main controller 1 may include input/output modules of other air conditioner control units, such as a remote communication control module, a fresh air control input/output module, a dehumidification control input/output module, and the like, and may set the operating state of the air conditioner during emergency start under different faults according to user requirements.
Further preferably, when the main controller 1 detects several faults at the same time, the faults detected by the strong electric control input/output module 6 and the fan rotating speed input/output module 4 are processed preferentially, the main controller 1 displays the faults preferentially, and when emergency starting is needed, corresponding codes are input by using a remote controller according to the displayed faults.
Further preferably, the driving motors of the indoor fan 14, the outdoor fan 15 and the compressor 18 may be variable frequency motors or fixed frequency motors.
Further preferably, the main controller 1 compares the operating parameters and the built-in parameters of the compressor 18, the outdoor fan 14, the indoor fan 15, the electromagnetic expansion valve 12 and the four-way valve 13, and when it is determined that no hardware fails, the main controller 1 can adjust the parameters to ensure that the air conditioner normally operates.
Further preferably, when the air conditioner suspends emergency start and performs fault maintenance, the main controller 1 is restored to the initial state by inputting a 2000 command through the remote controller.
Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
if the main components of the air conditioner, namely the compressor 18, the outdoor fan 14, the indoor fan 15, the electromagnetic expansion valve 12 and the four-way valve 13, have no hardware fault, the air conditioner can normally run by inputting corresponding instructions through a remote controller according to fault display of the main controller 1.
When a user encounters an air conditioner fault, the user only needs to input an instruction, and the main control unit 1 can continuously detect the working states of all the components and the sensors through the modules, judge whether all the main components are normal and continuously execute an emergency starting command.
Drawings
FIG. 1 is a schematic view of the air conditioning system configuration of the present invention;
in the figure: the device comprises a main controller 1, a temperature signal input module 2, a valve control output module 3, a fan speed regulation control input/output module 4, a pressure sensing switch signal input/output module 5, a strong current control output module 6, a first temperature sensor 7, a second temperature sensor 8, a third temperature sensor 9, a fourth temperature sensor 10, a fifth temperature sensor 11, an electronic expansion valve 12, a four-way valve 13, an indoor fan 14, an outdoor fan 15, a low-voltage sensing switch 16, a high-voltage sensing switch 17, a compressor 18, an auxiliary heating wire 19, an indoor evaporator 20 and an outdoor condenser 21.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. Based on the described embodiments of the invention, all other embodiments obtained by a person skilled in the art without any inventive step are within the scope of protection of the invention.
As shown in fig. 1, an air conditioning system with fault diagnosis and emergency start includes a control system and a cooling/heating system, wherein the control system includes a main controller 1, a temperature signal input module 2, a valve control output module 3, a fan speed regulation control input/output module 4, a pressure sensing switch signal input/output module 5, and a strong electric control output module 6; the cooling/heating system includes an electronic expansion valve 12, a compressor 18, an indoor evaporator 20, and an outdoor condenser 21.
The temperature signal input module 2, the valve control output module 3, the fan rotating speed input/output module 4, the pressure sensing switch input/output module 5 and the strong electric control input/output module 6 are integrated into the main controller 1, or the independent I/O module is connected to the main controller 1 through a circuit; the main controller 1 is in chip level, has data operation and storage capacity, and each input/output module has an A/D conversion function and can realize signal communication with connected equipment; when the temperature control device is implemented, the main control module 1 adopts an M37546 chip, the temperature signal input module 2 receives signals through the filter circuit and directly inputs the signals into the M37546 chip, the valve control output module 3 realizes functions by using a 2003 chip, the fan speed regulation control input/output module 4 realizes functions by using an optical coupling electronic switch P521-1, the pressure sensing switch signal input/output module 5 realizes functions by directly connecting the M37546 chip through the filter circuit, and the strong current control output module 6 realizes functions by using a PS21965-ST chip.
The cooling/heating system includes an electronic expansion valve 12, a compressor 18, an indoor evaporator 20, and an outdoor condenser 21; in the refrigerating/heating system, an exhaust port of a compressor 18 is connected with a lower inlet of a four-way valve 13 through a pipeline, an upper outlet of the four-way valve 13 is connected with a suction port of the compressor 18 through a pipeline, a left outlet of the four-way valve 13 is connected with an upper inlet of an indoor evaporator 20 through a pipeline, a lower outlet of the indoor evaporator 20 is connected with an inlet of an electromagnetic expansion valve 12 through a pipeline, an outlet of the electromagnetic expansion valve 12 is connected with a lower inlet of an outdoor condenser 21 through a pipeline, and an upper outlet of the outdoor condenser 21 is connected with a right inlet of the four-way valve 13 through a pipeline;
a first temperature sensor 7 and an auxiliary heating wire 19 are arranged at an air outlet at the left part of the indoor evaporator 20, a second temperature sensor 8 is arranged at the upper part of the indoor evaporator 20, and a first pressure sensing switch 16 is arranged on a pipeline between the outlet at the left part of the four-way valve 13 and the inlet at the upper part of the indoor evaporator 20; a third temperature sensor 9 is arranged at the upper part of the outdoor condenser 21, a fourth temperature sensor 10 is arranged at an air outlet at the right part of the outdoor condenser 21, and a fifth temperature sensor 11 and a second pressure induction switch 17 are sequentially arranged on a pipeline between an outlet at the upper part of the outdoor condenser 21 and an inlet at the right part of the four-way valve 13;
the first temperature sensor 7, the second temperature sensor 8, the third temperature sensor 9, the fourth temperature sensor 10 and the fifth temperature sensor 11 are connected to the temperature signal input module 2 through signal lines; the valve control output module 3 is connected with an electromagnetic expansion valve 12 and a four-way valve 13 through signal lines; the fan rotating speed input/output module 4 is connected with an indoor fan 14 and an outdoor fan 15 through signal lines; the pressure sensing switch input/output module 5 is connected with a first pressure sensing switch 16 and a second pressure sensing switch 17 through signal lines; the strong electric control input/output module 6 is connected with the compressor 18 and the auxiliary heating wire 19 through signal lines.
In the air conditioning system, a main controller 1 sets the set values or ranges of the temperature measured by each temperature sensor for normal operation of the air conditioner, the rotating speed of a fan, the rotating speed of a compressor and codes of different faults; the following codes for emergency start-up may also be provided in the main controller 1 as required:
| code | Instruction content | Code | Instruction content |
| 127 | Default ambient temperature is above 16 deg.C | 128 | The default evaporation temperature is 5 ℃ in summer and 40 ℃ in winter |
| 129 | Default condenser temperature of 40 deg.C in summer and 5 deg.C in winter | 1210 | Default compressor discharge temperature 105 deg.C |
| 1211 | Default outdoor ambient temperature 35 deg.C | 1312 | Adjusting the electromagnetic expansion valve to the maximum opening |
| 1414 | The indoor fan operates at maximum wind speed | 1415 | The outdoor fan operates at maximum wind speed |
| 1516 | Default compressor suction port low-pressure switch passage | 1517 | Default compressor exhaust port high-pressure switch passage |
| 1618 | Compressor operating at 50Hz | 1619 | Cut off the auxiliary electric heating wire to supply power |
| 2000 | The control system is restored to the initial state |
The above code numbers are only examples and can be adjusted as required.
The invention discloses a control method of an air conditioning system with fault diagnosis and emergency starting, which comprises four fault diagnosis and emergency starting control methods, and specifically comprises the following steps:
when the value of the temperature sensor deviates from the normal value, the control method for fault diagnosis and emergency starting comprises the following steps:
when the temperature signal input module 2 detects that the input values of the first temperature sensor 7, the second temperature sensor 8, the third temperature sensor 9, the fourth temperature sensor 10 and the fifth temperature sensor 11 deviate from the built-in data range of the main controller 1, the main controller 1 controls the air conditioner to actively display corresponding fault codes and carry out shutdown protection; when the first temperature sensor 7 breaks down, the air conditioner cannot run, the main controller 1 cannot detect the temperature of the indoor environment to control the starting and stopping of the air conditioner, if the air conditioner needs to be started in an emergency, 127 codes can be input into the main controller 1 through a remote controller, and the air conditioner starts to execute a command of stopping for 15 minutes after running for 30 minutes; when the second temperature sensor 8 has a fault, the air conditioner can execute low-temperature prevention or high-temperature prevention protection and cannot run, if the emergency start is needed, 128 codes can be input into the main controller 1 through a remote controller, when the air conditioner is in a refrigeration mode in summer, the main controller 1 shields the transmission numerical value of the second temperature sensor 8, a command of defaulting the second temperature sensor 8 to be 5 ℃ is executed, a command of executing the maximum wind speed is sent to the indoor fan 14 by the fan speed regulation control input/output module 3, when the air conditioner is in a heating mode in winter, the main controller 1 shields the transmission numerical value of the second temperature sensor 8, a command of defaulting the second temperature sensor 8 to be 40 ℃ is executed, and a command of executing the maximum wind speed is sent to the indoor fan 14 by the fan speed regulation control input/output module 3; when the third temperature sensor 9 and the fourth temperature sensor 10 have faults, the air conditioner can execute overheat protection and cannot operate, codes 129 and 1210 can be respectively input to the main controller 1 through a remote controller if emergency starting is needed, and a fan speed regulation control input/output module 3 sends a maximum wind speed execution command to the outdoor fan 15; when the fifth temperature sensor 11 is failed and the temperature input signal is higher than the set value of the main controller 1, the air conditioner can execute the protection of the compressor exhaust overheating and cannot operate, if emergency starting is needed, codes 1211 can be input into the main controller 1 through a remote controller, and a command of executing the maximum wind speed is sent to the outdoor fan 15 through the fan speed regulation control input/output module 3;
when the fan rotating speed input/output module detects that the fan rotating speed input signal deviates from a normal value, the control method of fault diagnosis and emergency starting comprises the following steps:
when the fan rotating speed input/output module 4 detects that rotating speed input signals of the indoor fan 14 and the outdoor fan 15 deviate from a built-in data range of the main controller 1, the air conditioner actively displays corresponding fault codes and stops the machine for protection; when the indoor fan 14 is in failure, the fan rotating speed input/output module 4 cannot detect a rotating speed input signal of the indoor fan 14, the air conditioner cannot run, if the air conditioner needs to be started in an emergency, a 1414 code can be input to the main controller 1 through a remote controller, the main controller 1 shields the rotating speed input signal of the indoor fan 14, the rotating speed of the indoor fan 14 is defaulted to be normal, the air conditioner continues to run, the indoor fan 14 executes a maximum wind speed command, and in a cooling mode in summer or a heating mode in winter, if the input temperature of the second temperature sensor 8 is lower than a built-in data range of the main controller 1, the air conditioner is forcibly stopped, and the emergency starting command is not executed any more; when the outdoor fan 15 is in fault, the fan rotating speed input/output module 4 cannot detect a rotating speed input signal of the outdoor fan 15, the air conditioner cannot run, if the air conditioner needs to be started in emergency, a 1415 code can be input to the main controller 1 through a remote controller, the main controller 1 shields the rotating speed signal of the outdoor fan 15, the rotating speed of the outdoor fan 15 is defaulted to be normal, the air conditioner continues to run, the outdoor fan 15 executes a maximum wind speed command, and if the temperature input value of the third temperature sensor 9 is lower than the built-in data range of the main controller 1 in a cooling mode in summer or a heating mode in winter, the air conditioner is forcibly stopped and does not execute the emergency starting command any more;
thirdly, when the pressure sensing switch fails to keep a path normally, the control method of fault diagnosis and emergency starting is as follows:
the first pressure induction switch 16 of the air suction port of the compressor and the second pressure induction switch 17 of the air exhaust port of the compressor are always kept in a closed state when the air conditioner is started and closed, if the suction pressure of the compressor is lower than the set pressure value of the first pressure induction switch 16 and the exhaust pressure of the compressor is higher than the set pressure value of the second pressure induction switch 17, the pressure induction switches can automatically cut off the power supply of the air conditioning system, at the moment, after the input/output module 5 of the pressure induction switches detects a power-off signal, the air conditioner can actively display a corresponding fault code and stop the machine for protection, if the air conditioner needs to be started in an emergency, 1516 or 1517 codes can be input into the main controller 1 through a remote controller, the main controller 1 can shield the signals of the first pressure induction switch 16 of the air suction port of the compressor or the second pressure induction switch 17 of the air exhaust port of the compressor, the air conditioner can continuously operate, if the first pressure induction switch 16 and the second pressure induction switch 17 are simultaneously opened, the main controller 1 will be forced to stop, and will not execute the emergency starting command any more; when the first pressure sensing switch 16 is switched off and the detected temperature of the second temperature sensor 8 deviates from the built-in data range of the main controller 1, the air conditioner executes the refrigerant leakage under-voltage protection, forcibly stops the air conditioner and does not execute an emergency starting command any more; when the second pressure sensing switch 17 is open and the detected temperature of the third temperature sensor 9 deviates from the built-in data range of the main controller 1, the air conditioner will execute the overvoltage protection, will forcibly stop the air conditioner, and will not execute the emergency starting command any more.
Fourthly, when the current of the strong electric component is abnormal, the control method of fault diagnosis and emergency starting is as follows:
if the compressor 18 is a variable frequency compressor, when the strong electric control input/output module 6 detects that the rotating speed input signal of the compressor 18 is inconsistent with the power supply frequency, and a step-out fault occurs, the air conditioner cannot operate, if emergency starting is needed, 1618 codes can be input into the main controller 1 through the remote controller, the compressor 18 operates at the frequency of 50Hz, and if the temperature value input by the second temperature sensor 8 deviates from the built-in data range of the main controller 1, the main controller 1 is forced to stop, and the emergency starting command is not executed any more. When the strong current control module 6 detects the overcurrent protection of the auxiliary heating wire 19, the air conditioner cannot run, if the emergency start is needed, a 1619 code can be input into the main controller 1 through the remote controller, the strong current control module 6 cuts off the power supply of the auxiliary heating wire 19, and the air conditioner continues to run.
The main controller 1 may include input/output modules of other air conditioner control units, such as a remote communication control module, a fresh air control input/output module, a dehumidification control input/output module, and the like, and may set the operating state of the air conditioner during emergency start under different faults according to user requirements.
When the main controller 1 detects several faults at the same time, faults detected by the strong current control input/output module 6 and the fan rotating speed input/output module 4 are processed preferentially, the main controller 1 displays the faults preferentially, and when the emergency starting is needed, corresponding codes are input by using a remote controller according to the displayed faults.
The driving motors of the indoor fan 14, the outdoor fan 15 and the compressor 18 can be variable frequency motors or fixed frequency motors.
The main controller 1 compares the running parameters and the built-in parameters of the compressor 18, the outdoor fan 14, the indoor fan 15, the electromagnetic expansion valve 12 and the four-way valve 13, and when no hardware fault occurs, the main controller 1 can adjust the parameters to ensure the normal running of the air conditioner.
When the air conditioner is suspended for emergency starting and fault maintenance, a 2000 command is input by a remote controller, and the main controller 1 is recovered to an initial state.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, and it is intended that the scope of the invention be limited only by the claims appended hereto.
Claims (8)
1. The air conditioning system with the fault diagnosis function and the emergency starting function is characterized by comprising a control system and a refrigeration/heat system, wherein the control system comprises a main controller (1), a temperature signal input module (2), a valve control output module (3), a fan speed regulation control input/output module (4), a pressure sensing switch signal input/output module (5) and a strong current control output module (6), and the temperature signal input module (2), the valve control output module (3), the fan rotating speed input/output module (4), the pressure sensing switch input/output module (5) and the strong current control input/output module (6) are integrated into the main controller (1) or an independent I/O module is connected to the main controller (1) through a circuit; the cooling/heating system comprises an electronic expansion valve (12), a compressor (18), an indoor evaporator (20) and an outdoor condenser (21); in the refrigerating/heating system, an exhaust port of a compressor (18) is connected with a lower inlet of a four-way valve (13) through a pipeline, an upper outlet of the four-way valve (13) is connected with a suction port of the compressor (18) through a pipeline, a left outlet of the four-way valve (13) is connected with an upper inlet of an indoor evaporator (20) through a pipeline, a lower outlet of the indoor evaporator (20) is connected with an inlet of an electromagnetic expansion valve (12) through a pipeline, an outlet of the electromagnetic expansion valve (12) is connected with a lower inlet of an outdoor condenser (21) through a pipeline, and an upper outlet of the outdoor condenser (21) is connected with a right inlet of the four-way valve (13) through a pipeline;
a first temperature sensor (7) and an auxiliary heating wire (19) are arranged at an air outlet at the left part of the indoor evaporator (20), a second temperature sensor (8) is arranged at the upper part of the indoor evaporator (20), and a first pressure sensing switch (16) is arranged on a pipeline between the outlet at the left part of the four-way valve (13) and the inlet at the upper part of the indoor evaporator (20); a third temperature sensor (9) is arranged at the upper part of the outdoor condenser (21), a fourth temperature sensor (10) is arranged at an air outlet at the right part of the outdoor condenser (21), and a fifth temperature sensor (11) and a second pressure sensing switch (17) are sequentially arranged on a pipeline between an outlet at the upper part of the outdoor condenser (21) and an inlet at the right part of the four-way valve (13);
the first temperature sensor (7), the second temperature sensor (8), the third temperature sensor (9), the fourth temperature sensor (10) and the fifth temperature sensor (11) are connected to the temperature signal input module (2) through signal lines; the valve control output module (3) is connected with the electromagnetic expansion valve (12) and the four-way valve (13) through signal lines; the fan rotating speed input/output module (4) is connected with the indoor fan (14) and the outdoor fan (15) through signal lines; the pressure sensing switch input/output module (5) is connected with a first pressure sensing switch (16) and a second pressure sensing switch (17) through signal lines; the strong electric control input/output module (6) is connected with the compressor (18) and the auxiliary heating wire (19) through signal wires.
2. An air conditioning system with fault diagnosis and emergency start according to claim 1, wherein: the main controller (1) comprises an input/output module of an air conditioner control unit, and codes of set values or ranges of temperature sensors for measuring temperature, fan rotating speed and compressor rotating speed and different faults of the normal operation of an air conditioner are arranged in the main controller (1); the main controller (1) is also internally provided with the following emergency starting codes according to requirements:
The above code numbers are only examples and can be adjusted as required.
3. An air conditioning system with fault diagnosis and emergency start according to claim 2, characterized in that: the input/output module of the air conditioner control unit comprises a remote communication control module, a fresh air control input/output module and a dehumidification control input/output module.
4. The control method of the air conditioning system with the fault diagnosis and the emergency start according to claim 3, characterized by comprising four fault diagnosis and emergency start control methods, specifically:
when the value of the temperature sensor deviates from the normal value, the control method for fault diagnosis and emergency starting comprises the following steps:
when the temperature signal input module (2) detects that the input values of the first temperature sensor (7), the second temperature sensor (8), the third temperature sensor (9), the fourth temperature sensor (10) and the fifth temperature sensor (11) deviate from the built-in data range of the main controller (1), the main controller (1) controls the air conditioner to actively display corresponding fault codes and carry out shutdown protection; when the first temperature sensor (7) breaks down, the air conditioner cannot operate, the main controller (1) cannot detect the temperature of the indoor environment to control the starting and stopping of the air conditioner, when the air conditioner needs to be started in an emergency, 127 codes are input into the main controller (1) through the remote controller, and the air conditioner starts to execute a command of stopping for 15 minutes after operating for 30 minutes; when the second temperature sensor (8) has a fault, the air conditioner can execute low-temperature prevention or high-temperature prevention protection and cannot run, when emergency starting is needed, 128 codes are input into the main controller (1) through a remote controller, when the air conditioner is in a cooling mode in summer, the main controller (1) shields the transmission numerical value of the second temperature sensor (8), a command that the second temperature sensor (8) is defaulted to be 5 ℃ is executed, a fan speed regulation control input/output module (3) sends a command for executing the maximum air speed to an indoor fan (14), when the air conditioner is in a heating mode in winter, the main controller (1) shields the transmission numerical value of the second temperature sensor (8), a command that the second temperature sensor (8) is defaulted to be 40 ℃ is executed, and a fan speed regulation control input/output module (3) sends a command for executing the maximum air speed to the indoor fan (14); when the third temperature sensor (9) and the fourth temperature sensor (10) have faults, the air conditioner can execute overheat protection and cannot run, when emergency starting is needed, codes 129 and 1210 are respectively input to the main controller (1) through a remote controller, and a fan speed regulation control input/output module (3) sends a maximum wind speed execution command to an outdoor fan (15); when the fifth temperature sensor (11) is in fault and the temperature input signal is higher than the set value of the main controller (1), the air conditioner can execute the exhaust overheating protection of the compressor and cannot run, when emergency starting is needed, codes 1211 are input into the main controller (1) through a remote controller, and a fan speed regulation control input/output module (3) sends a maximum wind speed execution command to an outdoor fan (15);
when the fan rotating speed input/output module detects that the fan rotating speed input signal deviates from a normal value, the control method of fault diagnosis and emergency starting comprises the following steps:
when the fan rotating speed input/output module (4) detects that rotating speed input signals of the indoor fan (14) and the outdoor fan (15) deviate from a built-in data range of the main controller (1), the air conditioner actively displays corresponding fault codes and stops the air conditioner for protection; when an indoor fan (14) breaks down and a fan rotating speed input/output module (4) cannot detect a rotating speed input signal of the indoor fan (14), the air conditioner cannot run, when the air conditioner needs to be started emergently, a 1414 code is input into a main controller (1) through a remote controller, the main controller (1) shields the rotating speed input signal of the indoor fan (14), the rotating speed of the indoor fan (14) is defaulted to be normal, the air conditioner continues to run, the indoor fan (14) executes a maximum wind speed command, and when a cooling mode in summer or a heating mode in winter, if the input temperature of a second temperature sensor (8) is lower than a built-in data range of the main controller (1), the air conditioner is forcibly stopped and does not execute an emergency starting command any more; when the outdoor fan (15) breaks down, the fan rotating speed input/output module (4) cannot detect a rotating speed input signal of the outdoor fan (15), the air conditioner cannot run, when the air conditioner needs to be started in an emergency, a 1415 code is input into the main controller (1) through the remote controller, the main controller (1) shields the rotating speed signal of the outdoor fan (15), the rotating speed of the outdoor fan (15) is defaulted to be normal, the air conditioner continues to run, the outdoor fan (15) executes a maximum wind speed command, and if the temperature input value of the third temperature sensor (9) is lower than the built-in data range of the main controller (1) in a summer cooling mode or a winter heating mode, the air conditioner is forcibly stopped, and the emergency starting command is not executed any more;
thirdly, when the pressure sensing switch fails to keep a path normally, the control method of fault diagnosis and emergency starting is as follows:
when the air conditioner is started and closed, a first pressure sensing switch (16) of a compressor air suction port and a second pressure sensing switch (17) of a compressor air exhaust port are always kept in a closed state, when the air suction pressure of the compressor is lower than the set pressure value of the first pressure sensing switch (16) and the air exhaust pressure of the compressor is higher than the set pressure value of the second pressure sensing switch (17), the pressure sensing switches can automatically cut off the power supply of the air conditioning system, at the moment, after a power-off signal is detected by a pressure sensing switch input/output module (5), the air conditioner can actively display a corresponding fault code and carry out shutdown protection, when the air conditioner needs to be started in emergency, a 1516 or 1517 code is input into a main controller (1) through a remote controller, and the main controller (1) shields the signal of the first pressure sensing switch (16) of the compressor air suction port or the second pressure sensing switch (17) of the compressor air exhaust port, the air conditioner continues to operate, if the first pressure sensing switch (16) and the second pressure sensing switch (17) are simultaneously disconnected, the main controller (1) is forcibly stopped, and an emergency starting command is not executed any more; when the first pressure sensing switch (16) is in an open circuit and the detection temperature of the second temperature sensor (8) deviates from the built-in data range of the main controller (1), the air conditioner executes the refrigerant leakage under-voltage protection, forcibly stops the air conditioner and does not execute an emergency starting command any more; when the second pressure sensing switch (17) is in an open circuit and the detected temperature of the third temperature sensor (9) deviates from the built-in data range of the main controller (1), the air conditioner executes overvoltage protection, forcibly stops the air conditioner and does not execute an emergency starting command any more;
fourthly, when the current of the strong electric component is abnormal, the control method of fault diagnosis and emergency starting is as follows:
when the compressor (18) is a variable frequency compressor, when the strong electric control input/output module (6) detects that the rotating speed input signal of the compressor (18) is inconsistent with the power supply frequency, and a step-out fault occurs, the air conditioner cannot operate, when emergency starting is needed, 1618 codes are input into the main controller (1) through the remote controller, the compressor (18) operates at the frequency of 50Hz, and when the temperature value input by the second temperature sensor (8) deviates from the built-in data range of the main controller (1), the main controller (1) is forced to stop, and an emergency starting command is not executed. When the strong electric control module (6) detects overcurrent protection of the auxiliary heating wire (19), the air conditioner cannot run, when emergency starting is needed, 1619 codes are input into the main controller (1) through the remote controller, the strong electric control module (6) cuts off the power supply of the auxiliary heating wire (19), and the air conditioner continues to run.
5. The method for controlling an air conditioning system with fault diagnosis and emergency starting according to claim 4, wherein when the main controller (1) detects several faults simultaneously, the faults detected by the strong electric control input/output module (6) and the fan speed input/output module (4) are processed preferentially, the main controller (1) displays the faults preferentially, and when the emergency starting is needed, corresponding codes are input by a remote controller according to the displayed faults.
6. The method for controlling an air conditioning system with fault diagnosis and emergency start according to claim 4, wherein the driving motors of the indoor fan (14), the outdoor fan (15) and the compressor (18) can be variable frequency motors or fixed frequency motors.
7. The control method of the air conditioning system with the fault diagnosis and the emergency start according to claim 4, characterized in that the main controller (1) ensures the normal operation of the air conditioner by comparing the operating parameters and the built-in parameters of the compressor (18), the outdoor fan (14), the indoor fan (15), the electromagnetic expansion valve (12) and the four-way valve (13) and adjusting the parameters through the main controller (1) when no hardware fault occurs.
8. The method for controlling an air conditioning system with fault diagnosis and emergency start according to claim 4, wherein the main controller (1) is restored to an initial state by inputting 2000 a command through a remote controller when the air conditioner suspends the emergency start for fault maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210555372.5A CN114857741A (en) | 2022-05-20 | 2022-05-20 | Air conditioning system with fault diagnosis and emergency starting functions and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210555372.5A CN114857741A (en) | 2022-05-20 | 2022-05-20 | Air conditioning system with fault diagnosis and emergency starting functions and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114857741A true CN114857741A (en) | 2022-08-05 |
Family
ID=82639813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210555372.5A Pending CN114857741A (en) | 2022-05-20 | 2022-05-20 | Air conditioning system with fault diagnosis and emergency starting functions and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114857741A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789859A (en) * | 2022-12-07 | 2023-03-14 | 珠海格力电器股份有限公司 | Air conditioner fault diagnosis method, terminal and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07248167A (en) * | 1994-03-10 | 1995-09-26 | Mitsubishi Electric Corp | Air conditioner |
| CN1455193A (en) * | 2002-04-29 | 2003-11-12 | 上海日立电器有限公司 | Digital direct-current variable frequency air conditioner controller |
| CN107576011A (en) * | 2017-09-04 | 2018-01-12 | 珠海格力电器股份有限公司 | Air-conditioning emergency control method and device |
| CN108613329A (en) * | 2018-04-28 | 2018-10-02 | 海信科龙电器股份有限公司 | A kind of convertible frequency air-conditioner and its control method |
| CN111223349A (en) * | 2019-11-08 | 2020-06-02 | 中车长春轨道客车股份有限公司 | Intelligent debugging and training system and method for heating and ventilation control of urban railway passenger car |
-
2022
- 2022-05-20 CN CN202210555372.5A patent/CN114857741A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07248167A (en) * | 1994-03-10 | 1995-09-26 | Mitsubishi Electric Corp | Air conditioner |
| CN1455193A (en) * | 2002-04-29 | 2003-11-12 | 上海日立电器有限公司 | Digital direct-current variable frequency air conditioner controller |
| CN107576011A (en) * | 2017-09-04 | 2018-01-12 | 珠海格力电器股份有限公司 | Air-conditioning emergency control method and device |
| CN108613329A (en) * | 2018-04-28 | 2018-10-02 | 海信科龙电器股份有限公司 | A kind of convertible frequency air-conditioner and its control method |
| CN111223349A (en) * | 2019-11-08 | 2020-06-02 | 中车长春轨道客车股份有限公司 | Intelligent debugging and training system and method for heating and ventilation control of urban railway passenger car |
Non-Patent Citations (1)
| Title |
|---|
| 沈九兵;郭霆;武晓昆;陈文卿;: "单级/复叠双制式热泵干燥系统设计与试验研究", 机械工程学报, no. 10, 20 May 2018 (2018-05-20), pages 235 - 241 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789859A (en) * | 2022-12-07 | 2023-03-14 | 珠海格力电器股份有限公司 | Air conditioner fault diagnosis method, terminal and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110173854B (en) | Low-temperature heating start control method of air conditioner and air conditioner | |
| CN104110780B (en) | Air conditioner and control method and system for electric auxiliary heating thereof | |
| CN103292389B (en) | Air conditioner as well as outdoor unit and temperature controller thereof and control method of air conditioner | |
| CN103940052B (en) | Air-conditioner and its fault detection method | |
| CN106705361A (en) | Low-temperature refrigeration control method, controller and air conditioner | |
| CA2639405C (en) | Air conditioning system for low ambient cooling | |
| CN106288236B (en) | Air conditioner compress control method and air conditioner | |
| CN109751911B (en) | Self-adaptive adjusting method for fan frequency of cooling tower and air conditioning system | |
| CN106705362A (en) | Low-temperature refrigerating control method, controller and air conditioner | |
| CN203286652U (en) | Air conditioner | |
| CN107314505B (en) | Adaptive control method for variable frequency air conditioning unit | |
| CN105135622A (en) | Control method of household air conditioner and household air conditioner | |
| CN112460936B (en) | Black tea hair drying room and control method thereof | |
| CN113446706B (en) | Air conditioner control method and air conditioner | |
| CN114857741A (en) | Air conditioning system with fault diagnosis and emergency starting functions and control method thereof | |
| CN112762527A (en) | Multi-split air conditioning system and power-off control method thereof | |
| CN111473478A (en) | Control method of air conditioner and air conditioner | |
| CN111412636B (en) | Air conditioner without communication circuit between indoor unit and outdoor unit and control method thereof | |
| CN109405166A (en) | A kind of automatic recovery control method of air-conditioning power-off | |
| CN106403181B (en) | A kind of air conditioner and its low-temperature heating control method | |
| CN105864010B (en) | A kind of control method of the compressor of air conditioner of multispeed electric machine driving | |
| CN105066335B (en) | A kind of communication cabinet DC frequency converting air-conditioner control system | |
| CN205536392U (en) | A precision air conditioning economizer for computer lab | |
| CN111397141B (en) | Dehumidifier control method | |
| CN111219858B (en) | Multistage electric auxiliary heating water multi-connected air conditioner cold air prevention control method and system and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |