CN114857741B - 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
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- CN114857741B CN114857741B CN202210555372.5A CN202210555372A CN114857741B CN 114857741 B CN114857741 B CN 114857741B CN 202210555372 A CN202210555372 A CN 202210555372A CN 114857741 B CN114857741 B CN 114857741B
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 32
- 238000004378 air conditioning Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 29
- 230000033228 biological regulation Effects 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000012423 maintenance Methods 0.000 claims description 9
- 238000005485 electric heating Methods 0.000 claims description 8
- 238000005057 refrigeration Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000007791 dehumidification Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical 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
- 230000036561 sun exposure Effects 0.000 description 1
Classifications
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
Abstract
An air conditioning system with fault diagnosis and emergency starting 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 electric control output module. Each control module is integrated into the main controller or connected to the main controller through a circuit, and each module is connected with the corresponding control component through a wire to jointly form the air conditioner fault diagnosis system. The outside 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 faults of the air conditioner, and when the faults of non-main parts occur, the remote controller sends the instruction to the main controller, so that the related faults are shielded, and the emergency starting of the air conditioner is realized. When various faults are encountered, the system can automatically judge whether to continue to execute the emergency starting scheme, so that the user can enjoy 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 capable of meeting the requirement that a user can use an emergency starting function to ensure that an air conditioner can normally operate when encountering air conditioning faults.
Background
Air conditioning is an indispensable household appliance for thousands of households in hot summer or cold winter. At present, air conditioners are popular, the service life of the air conditioner is as long as 10 years, the air conditioner outdoor unit is generally installed outdoors, and parts or circuit boards are easy to wear and age due to long-term wind and sun exposure. Summer and winter are the highest season of air conditioner use frequency, and the user that the air conditioner used is the most, and the after-market maintenance personnel of air conditioner distributor is limited, causes a large amount of trouble air conditioners to be unable to maintain in time, but the indoor temperature of hot summer and cold winter causes the human extreme uncomfortable, and normal work or rest in the room that does not have the air conditioner hardly, especially when meeting the air conditioner trouble suddenly evening, more can't solve.
At present, when a user encounters an air conditioner fault, the only way is to dial an air conditioner distributor telephone, wait for a maintenance engineer to go to the door for solving, possibly wait for 3-5 days in a busy maintenance season, and if the maintenance engineer needs to replace accessories, wait for several days after going to the door, and have a long maintenance period, so that the user is in a painful decoction, and if one air conditioner has fault diagnosis and an emergency starting system, the emergency starting can be started in a fault, the emergency starting method is very meaningful, and the emergency starting method is also in a severe weather that the user does not suffer in the process of waiting for maintenance.
Disclosure of Invention
The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an air conditioning system with 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 refrigerating/heating 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 electric control output module 6, wherein 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 electric control input/output module 6 can be integrated into the main controller (1), or the independent I/O module is connected to the main controller (1) through a circuit; the refrigeration/heat 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 an air 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 the left air outlet 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 left outlet of the four-way valve 13 and the upper inlet of the indoor evaporator 20; the upper part of the outdoor condenser 21 is provided with a third temperature sensor 9, the right air outlet of the outdoor condenser 21 is provided with a fourth temperature sensor 10, and a pipeline between the upper outlet of the outdoor condenser 21 and the right inlet of the four-way valve 13 is sequentially provided with a fifth temperature sensor 11 and a second pressure sensing switch 17;
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 wires; the fan rotating speed input/output module 4 is connected with an indoor fan 14 and an outdoor fan 15 through signal wires; 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 wires; the strong electric control input/output module 6 is connected with the compressor 18 and the auxiliary heating wire 19 through signal wires.
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 running state of the air conditioner when the air conditioner is started in an emergency under different faults according to the user requirements.
The main controller 1 is provided with codes for measuring temperature, fan rotating speed, set value or range of compressor rotating speed and different faults by each temperature sensor for normal operation of the air conditioner; the main controller 1 can also be provided with the following emergency start codes as required:
| Code | Instruction content | Code | Instruction content |
| 127 | Default ambient temperature is above 16 DEG C | 128 | Default evaporating temperature of 5 deg.c in summer and 40 deg.c in winter |
| 129 | Default condenser temperature 40 ℃ in summer and 5 ℃ 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 the maximum wind speed | 1415 | The outdoor fan operates at maximum wind speed |
| 1516 | Default compressor suction port low voltage switch path | 1517 | Default compressor exhaust high voltage switch path |
| 1618 | The compressor is operated at 50HZ frequency | 1619 | Cutting off the power supply of the auxiliary electric heating wire |
| 2000 | The control system is restored to the initial state |
The above code numbers are merely examples, and may be actually adjusted as needed.
The invention relates to a control method of an air conditioning system with fault diagnosis and emergency starting, which comprises four control methods of fault diagnosis and emergency starting, and specifically comprises the following steps:
1. When the value of the temperature sensor deviates from the normal value, the control method for fault diagnosis and emergency starting is as follows:
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 stop protecting; when the first temperature sensor 7 fails, the air conditioner cannot operate, the main controller 1 cannot detect the temperature of the indoor environment to control the on and off 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 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 fails, the air conditioner can execute low temperature protection or high temperature protection and cannot operate, if the emergency starting is required, 128 codes can be input to the main controller 1 through the remote controller, when the air conditioner is in a summer air-conditioning refrigeration mode, the main controller 1 shields the transmission numerical value of the second temperature sensor 8, executes a command that the second temperature sensor 8 is 5 ℃ by default, and sends out a command for executing the maximum wind speed 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, executes a command that the second temperature sensor 8 is 40 ℃ by default, and sends out a command for executing the maximum wind speed 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 are out of order, the air conditioner can execute overheat protection and can not operate, if emergency starting is required, codes 129 and 1210 can be respectively input to the main controller 1 through a remote controller, and a maximum wind speed executing command is sent to the outdoor fan 15 by the fan speed regulating control input/output module 3; when the fifth temperature sensor 11 fails and the temperature input signal is higher than the set value of the main controller 1, the air conditioner can execute the exhaust overheat protection of the compressor and can not run, if the emergency starting is required, a 1211 code can be input to the main controller 1 through a remote controller, and a maximum wind speed executing command is sent to the outdoor fan 15 by the fan speed regulating control input/output module 3;
2. When the fan rotating speed input/output module detects that the fan rotating speed input signal deviates from a normal value, the control method for fault diagnosis and emergency starting is as follows:
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 the built-in data range of the main controller 1, the air conditioner actively displays corresponding fault codes and stops protecting; when the indoor fan 14 fails, the fan rotation speed input/output module 4 cannot detect the rotation speed input signal of the indoor fan 14, the air conditioner cannot operate, if the air conditioner needs to be started in an emergency, the main controller 1 can input 1414 codes to the main controller, the main controller 1 can shield the rotation speed input signal of the indoor fan 14, the rotation speed of the indoor fan 14 is normal by default, the air conditioner continues to operate, the indoor fan 14 executes a maximum wind speed command, when in a summer cooling mode or a winter heating mode, if the input temperature of the second temperature sensor 8 is lower than the built-in data range of the main controller 1, the air conditioner is stopped in a forced mode, and the emergency starting command is not executed any more; when the outdoor fan 15 fails, the fan rotation speed input/output module 4 cannot detect a rotation speed input signal of the outdoor fan 15, the air conditioner cannot operate, if the air conditioner needs to be started in an emergency, a 1415 code can be input to the main controller 1 through the remote controller, the main controller 1 shields the rotation speed signal of the outdoor fan 15, the rotation speed of the outdoor fan 15 is normal by default, the air conditioner continues to operate, the outdoor fan 15 executes a maximum wind speed command, and when in a summer refrigeration mode or a winter heating mode, if the temperature input value of the third temperature sensor 9 is lower than the built-in data range of the main controller 1, the air conditioner is stopped forcibly, and the emergency starting command is not executed any more;
3. when the pressure-sensitive switch fails and the passage cannot be normally maintained, the control method for fault diagnosis and emergency starting is as follows:
The first pressure sensing switch 16 of the air suction port of the compressor and the second pressure sensing switch 17 of the air discharge port of the compressor should keep the state of the passage all the time 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 sensing switch 16, the discharge pressure of the compressor is higher than the set pressure value of the second pressure sensing switch 17, the pressure sensing switch can automatically cut off the power supply of the air conditioning system, at this moment, after the input/output module 5 of the pressure sensing switch detects the power-off signal, the air conditioner can actively display the corresponding fault code and stop protecting, if the air conditioner needs to be started in an emergency, the 1516 or 1517 code can be input to the main controller 1 through the remote controller, the main controller 1 can shield the signals of the first pressure sensing switch 16 of the air suction port of the compressor or the second pressure sensing switch 17 of the air conditioner, the air conditioner continues to operate, if the first pressure sensing switch 16 and the second pressure sensing switch 17 are cut off simultaneously, the main controller 1 will stop forcedly, and the emergency starting command is not executed; when the first pressure sensing switch 16 is turned 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 will execute the refrigerant leakage under-voltage protection, will be forced to stop, and will not execute the emergency starting command any more; when the second pressure-sensitive switch 17 is opened 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 perform overvoltage protection, will be forced to stop, and will not perform an emergency start command.
4. When the current of the strong current component is abnormal, the control method for 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 rotation 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 required, 1618 codes can be input into the main controller 1 through the remote controller, the compressor 18 operates at the frequency of 50 hertz, 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 no emergency starting command is executed. When the strong electric control module 6 detects the overcurrent protection of the auxiliary electric heating wire 19, the air conditioner cannot operate, if emergency starting is required, 1619 codes can be input to the main controller 1 through the remote controller, the strong electric control module 6 cuts off the power supply of the auxiliary electric heating wire 19, and the air conditioner continues to operate.
Further preferably, the main controller 1 may include an input/output module 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, etc., and may set the running state of the air conditioner at the time of emergency start under different faults according to the 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, the corresponding codes are input by the 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 can be variable frequency motors or fixed frequency motors.
Further preferably, the main controller 1 compares the operation parameters of the compressor 18, the outdoor fan 14, the indoor fan 15, the electromagnetic expansion valve 12 and the four-way valve 13 with the built-in parameters, and when no hardware failure is judged, the main controller 1 can adjust the parameters to ensure the normal operation of the air conditioner.
Further preferably, when the air conditioner pauses the emergency start to perform fault maintenance, a 2000 instruction is input by the remote controller, and the main controller 1 is restored to the initial state.
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 faults, the air conditioner can normally operate by inputting corresponding instructions through the remote controller according to the fault display of the main controller 1.
When the user encounters an air conditioner fault, the user only needs to input an instruction, and the main control 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 or not and continuously execute an emergency starting command or not.
Drawings
FIG. 1 is a schematic view of an air conditioning system according to the present invention;
In the figure: 1 is a main controller, 2 is a temperature signal input module, 3 is a valve control output module, 4 is a fan speed regulation control input/output module, 5 is a pressure sensing switch signal input/output module, 6 is a strong electric control output module, 7 is a first temperature sensor, 8 is a second temperature sensor, 9 is a third temperature sensor, 10 is a fourth temperature sensor, 11-bit fifth temperature sensor, 12 is an electronic expansion valve, 13 is a four-way valve, 14 is an indoor fan, 15 is an outdoor fan, 16 is a low-voltage sensing switch, 17 is a high-voltage sensing switch, 18 is a compressor, 19 is an auxiliary electric heating wire, 20 is an indoor evaporator, and 21 is an outdoor condenser.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures and examples are described in detail below. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention belong to the protection scope of the present invention.
As shown in fig. 1, an air conditioning system with fault diagnosis and emergency starting comprises a control system and a refrigerating/heating 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 electric control output module 6; the refrigeration/thermal 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 modules are connected to the main controller 1 through circuits; the main controller 1 is chip-level and 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; during implementation, the main control module 1 selects 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 uses a 2003 chip to realize functions, the fan speed regulation control input/output module 4 uses the optocoupler electronic switch P521-1 to realize functions, the pressure sensing switch signal input/output module 5 is directly connected with the M37546 chip through the filter circuit to realize functions, and the strong electric control output module 6 uses a PS21965-ST chip to realize functions.
The refrigeration/heat 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 an air 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 the left air outlet 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 left outlet of the four-way valve 13 and the upper inlet of the indoor evaporator 20; the upper part of the outdoor condenser 21 is provided with a third temperature sensor 9, the right air outlet of the outdoor condenser 21 is provided with a fourth temperature sensor 10, and a pipeline between the upper outlet of the outdoor condenser 21 and the right inlet of the four-way valve 13 is sequentially provided with a fifth temperature sensor 11 and a second pressure sensing switch 17;
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 wires; the fan rotating speed input/output module 4 is connected with an indoor fan 14 and an outdoor fan 15 through signal wires; 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 wires; the strong electric control input/output module 6 is connected with the compressor 18 and the auxiliary heating wire 19 through signal wires.
In the air conditioning system, a main controller 1 sets the set value or range of the temperature sensor measuring temperature, the fan rotating speed and the compressor rotating speed of the normal operation of the air conditioner and codes of different faults; the main controller 1 can also be provided with the following emergency start codes as required:
| Code | Instruction content | Code | Instruction content |
| 127 | Default ambient temperature is above 16 DEG C | 128 | Default evaporating temperature of 5 deg.c in summer and 40 deg.c in winter |
| 129 | Default condenser temperature 40 ℃ in summer and 5 ℃ 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 the maximum wind speed | 1415 | The outdoor fan operates at maximum wind speed |
| 1516 | Default compressor suction port low voltage switch path | 1517 | Default compressor exhaust high voltage switch path |
| 1618 | The compressor is operated at 50HZ frequency | 1619 | Cutting off the power supply of the auxiliary electric heating wire |
| 2000 | The control system is restored to the initial state |
The above code numbers are merely examples, and may be actually adjusted as needed.
The invention relates to a control method of an air conditioning system with fault diagnosis and emergency starting, which comprises four control methods of fault diagnosis and emergency starting, and specifically comprises the following steps:
1. When the value of the temperature sensor deviates from the normal value, the control method for fault diagnosis and emergency starting is as follows:
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 stop protecting; when the first temperature sensor 7 fails, the air conditioner cannot operate, the main controller 1 cannot detect the temperature of the indoor environment to control the on and off 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 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 fails, the air conditioner can execute low temperature protection or high temperature protection and cannot operate, if the emergency starting is required, 128 codes can be input to the main controller 1 through the remote controller, when the air conditioner is in a summer air-conditioning refrigeration mode, the main controller 1 shields the transmission numerical value of the second temperature sensor 8, executes a command that the second temperature sensor 8 is 5 ℃ by default, and sends out a command for executing the maximum wind speed 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, executes a command that the second temperature sensor 8 is 40 ℃ by default, and sends out a command for executing the maximum wind speed 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 are out of order, the air conditioner can execute overheat protection and can not operate, if emergency starting is required, codes 129 and 1210 can be respectively input to the main controller 1 through a remote controller, and a maximum wind speed executing command is sent to the outdoor fan 15 by the fan speed regulating control input/output module 3; when the fifth temperature sensor 11 fails and the temperature input signal is higher than the set value of the main controller 1, the air conditioner can execute the exhaust overheat protection of the compressor and can not run, if the emergency starting is required, a 1211 code can be input to the main controller 1 through a remote controller, and a maximum wind speed executing command is sent to the outdoor fan 15 by the fan speed regulating control input/output module 3;
2. When the fan rotating speed input/output module detects that the fan rotating speed input signal deviates from a normal value, the control method for fault diagnosis and emergency starting is as follows:
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 the built-in data range of the main controller 1, the air conditioner actively displays corresponding fault codes and stops protecting; when the indoor fan 14 fails, the fan rotation speed input/output module 4 cannot detect the rotation speed input signal of the indoor fan 14, the air conditioner cannot operate, if the air conditioner needs to be started in an emergency, the main controller 1 can input 1414 codes to the main controller, the main controller 1 can shield the rotation speed input signal of the indoor fan 14, the rotation speed of the indoor fan 14 is normal by default, the air conditioner continues to operate, the indoor fan 14 executes a maximum wind speed command, when in a summer cooling mode or a winter heating mode, if the input temperature of the second temperature sensor 8 is lower than the built-in data range of the main controller 1, the air conditioner is stopped in a forced mode, and the emergency starting command is not executed any more; when the outdoor fan 15 fails, the fan rotation speed input/output module 4 cannot detect a rotation speed input signal of the outdoor fan 15, the air conditioner cannot operate, if the air conditioner needs to be started in an emergency, a 1415 code can be input to the main controller 1 through the remote controller, the main controller 1 shields the rotation speed signal of the outdoor fan 15, the rotation speed of the outdoor fan 15 is normal by default, the air conditioner continues to operate, the outdoor fan 15 executes a maximum wind speed command, and when in a summer refrigeration mode or a winter heating mode, if the temperature input value of the third temperature sensor 9 is lower than the built-in data range of the main controller 1, the air conditioner is stopped forcibly, and the emergency starting command is not executed any more;
3. when the pressure-sensitive switch fails and the passage cannot be normally maintained, the control method for fault diagnosis and emergency starting is as follows:
The first pressure sensing switch 16 of the air suction port of the compressor and the second pressure sensing switch 17 of the air discharge port of the compressor should keep the state of the passage all the time 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 sensing switch 16, the discharge pressure of the compressor is higher than the set pressure value of the second pressure sensing switch 17, the pressure sensing switch can automatically cut off the power supply of the air conditioning system, at this moment, after the input/output module 5 of the pressure sensing switch detects the power-off signal, the air conditioner can actively display the corresponding fault code and stop protecting, if the air conditioner needs to be started in an emergency, the 1516 or 1517 code can be input to the main controller 1 through the remote controller, the main controller 1 can shield the signals of the first pressure sensing switch 16 of the air suction port of the compressor or the second pressure sensing switch 17 of the air conditioner, the air conditioner continues to operate, if the first pressure sensing switch 16 and the second pressure sensing switch 17 are cut off simultaneously, the main controller 1 will stop forcedly, and the emergency starting command is not executed; when the first pressure sensing switch 16 is turned 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 will execute the refrigerant leakage under-voltage protection, will be forced to stop, and will not execute the emergency starting command any more; when the second pressure-sensitive switch 17 is opened 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 perform overvoltage protection, will be forced to stop, and will not perform an emergency start command.
4. When the current of the strong current component is abnormal, the control method for 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 rotation 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 required, 1618 codes can be input into the main controller 1 through the remote controller, the compressor 18 operates at the frequency of 50 hertz, 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 no emergency starting command is executed. When the strong electric control module 6 detects the overcurrent protection of the auxiliary electric heating wire 19, the air conditioner cannot operate, if emergency starting is required, 1619 codes can be input to the main controller 1 through the remote controller, the strong electric control module 6 cuts off the power supply of the auxiliary electric heating wire 19, and the air conditioner continues to operate.
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, etc., and may set the running state of the air conditioner during emergency starting under different faults according to user requirements.
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, the corresponding codes are input by the 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 operation 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 judging that no hardware fails, the main controller 1 can adjust the parameters to ensure the normal operation of the air conditioner.
When the air conditioner pauses emergency starting to carry out fault maintenance, a 2000 instruction is input by using the remote controller, and the main controller 1 is restored to an initial state.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (5)
1. The control method of the air conditioning system with fault diagnosis and emergency starting comprises a control system and a refrigerating/heating 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 induction switch signal input/output module (5) and a strong electric 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 induction switch input/output module (5) and the strong electric control input/output module (6) are integrated into the main controller (1) or are connected to the main controller (1) through circuits; the refrigeration/heating system comprises an electromagnetic 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 an air 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 the left air outlet 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 left outlet of the four-way valve (13) and the upper inlet of the indoor evaporator (20); the upper part of the outdoor condenser (21) is provided with a third temperature sensor (9), the right air outlet of the outdoor condenser (21) is provided with a fourth temperature sensor (10), and a pipeline between the upper outlet of the outdoor condenser (21) and the right inlet of the four-way valve (13) is sequentially provided with a fifth temperature sensor (11) and a second pressure sensing switch (17);
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 wires; 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 the first pressure sensing switch (16) and the second pressure sensing switch (17) through signal wires; the strong electric control input/output module (6) is connected with the compressor (18) and the auxiliary heating wire (19) through signal wires;
The main controller (1) comprises an input/output module of an air conditioner control unit, and each temperature sensor for normal operation of the air conditioner is arranged in the main controller (1) to measure the temperature, the rotating speed of the fan, the set value or range of the rotating speed of the compressor and codes of different faults; the main controller (1) is also internally provided with the following emergency starting codes according to the need:
code 127: meaning that the default ambient temperature is above 16 ℃;
Code 128: the default evaporating temperature is 5 ℃ in summer and 40 ℃ in winter;
code 129: the default condenser temperature is 40 ℃ in summer and 5 ℃ in winter;
code 1210: refers to a default compressor discharge temperature of 105 ℃;
Code 1211: refers to a default outdoor ambient temperature of 35 ℃;
Code 1312: adjusting the electromagnetic expansion valve to the maximum opening;
code 1414: the indoor fan runs at the maximum wind speed;
code 1415: the outdoor fan operates at the maximum wind speed;
code 1516: refers to a default compressor suction port low-voltage switch passage;
code 1517: refers to a default compressor exhaust port high-voltage switch path;
code 1618: refers to the compressor operating at 50 HZ;
Code 1619: cutting off the power supply of the auxiliary electric heating wire;
code 2000: the command control system is restored to an initial state;
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;
the control method is characterized by comprising four fault diagnosis and emergency starting steps, and specifically comprises the following steps:
1. When the value of the temperature sensor deviates from the normal value, the control method for fault diagnosis and emergency starting is as follows:
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 stop protecting; when the first temperature sensor (7) fails, the air conditioner cannot operate, the main controller (1) cannot detect the temperature of the indoor environment to control the start and stop 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) fails, the air conditioner can execute low-temperature protection or high-temperature protection and cannot operate, when an emergency start is needed, 128 codes are input to the main controller (1) through the remote controller, when an air conditioner refrigerating mode in summer is used, the main controller (1) shields transmission values of the second temperature sensor (8), a command of the default second temperature sensor (8) at 5 ℃ is executed, a command of executing maximum wind speed is sent to the indoor fan (14) by the fan speed regulation control input/output module (4), when the air conditioner in winter is in a heating mode, the main controller (1) shields the transmission values of the second temperature sensor (8), a command of the default second temperature sensor (8) at 40 ℃ is executed, and a command of executing maximum wind speed is sent to the indoor fan (14) by the fan speed regulation control input/output module (4); when the third temperature sensor (9) and the fourth temperature sensor (10) are in failure, the air conditioner can execute overheat protection and cannot operate, when emergency starting is needed, codes 129 and 1210 are respectively input to the main controller (1) through the remote controller, and a maximum wind speed executing command is sent to the outdoor fan (15) through the fan speed regulating control input/output module (4); when the fifth temperature sensor (11) fails and the temperature input signal is higher than the set value of the main controller (1), the air conditioner can execute the exhaust overheat protection of the compressor and can not run, when emergency starting is needed, a 1211 code is input to the main controller (1) through the remote controller, and a fan speed regulation control input/output module (3) sends an executing maximum wind speed command to the outdoor fan (15);
2. When the fan rotating speed input/output module detects that the fan rotating speed input signal deviates from a normal value, the control method for fault diagnosis and emergency starting is as follows:
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 the built-in data range of the main controller (1), the air conditioner actively displays corresponding fault codes and stops protecting; when the indoor fan (14) fails, the fan rotating speed input/output module (4) cannot detect the rotating speed input signal of the indoor fan (14), the air conditioner cannot operate, when the air conditioner needs to be started in an emergency, a 1414 code is input to the main controller (1) through the 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 normal by default, the air conditioner continues to operate, the indoor fan (14) executes a maximum wind speed command, and when in a summer refrigerating mode or a winter heating mode, if the input temperature of the second temperature sensor (8) is lower than the built-in data range of the main controller (1), the air conditioner is stopped forcibly, and the emergency starting command is not executed any more; when the outdoor fan (15) fails, the fan rotating speed input/output module (4) cannot detect a rotating speed input signal of the outdoor fan (15), the air conditioner cannot operate, when the air conditioner needs to be started in an emergency, 1415 codes are input to 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 normal by default, the air conditioner continues to operate, the outdoor fan (15) executes a maximum wind speed command, and when in a summer refrigerating mode or a winter heating mode, if the temperature input value of the third temperature sensor (9) is lower than the built-in data range of the main controller (1), the air conditioner is stopped forcibly, and the emergency starting command is not executed any more;
3. when the pressure-sensitive switch fails and the passage cannot be normally maintained, the control method for fault diagnosis and emergency starting is as follows:
When the air conditioner is started and closed, the first pressure sensing switch (16) of the air suction port of the compressor and the second pressure sensing switch (17) of the air discharge port of the compressor are always kept in a passage state, when the suction pressure of the compressor is lower than the set pressure value of the first pressure sensing switch (16) and the discharge pressure of the compressor is higher than the set pressure value of the second pressure sensing switch (17), the pressure sensing switch can automatically cut off the power supply of an air conditioning system, at the moment, after the input/output module (5) of the pressure sensing switch detects a power-off signal, the air conditioner actively displays a corresponding fault code and stops protecting, when the air conditioner needs to be started in an emergency, 1516 or 1517 codes are input to the main controller (1) through a remote controller, the main controller (1) can shield the signals of the first pressure sensing switch (16) of the air suction port of the compressor or the second pressure sensing switch (17) of the air discharge port of the compressor, and the air conditioner continues to operate, and if the first pressure sensing switch (16) and the second pressure sensing switch (17) are simultaneously cut off, the main controller (1) will forcedly stop and stop the emergency starting command is not executed any more; when the first pressure sensing switch (16) is disconnected 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, is forced to stop, and does not execute an emergency starting command; when the second pressure sensing switch (17) is disconnected 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, is forced to stop, and does not execute an emergency starting command;
4. When the current of the strong current component is abnormal, the control method for fault diagnosis and emergency starting is as follows:
When the compressor (18) is a variable-frequency compressor, and 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 required, 1618 codes are input into the main controller (1) through the remote controller, the compressor (18) operates at 50 Hz frequency, 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 no emergency starting command is executed; when the strong electric control input/output module (6) detects overcurrent protection of the auxiliary heating wire (19), the air conditioner cannot operate, when emergency starting is needed, 1619 codes are input into the main controller (1) through the remote controller, the strong electric control input/output module (6) cuts off the power supply of the auxiliary heating wire (19), and the air conditioner continues to operate.
2. The control method of an air conditioning system with fault diagnosis and emergency start according to claim 1, characterized in that 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 rotation speed input/output module (4) are processed preferentially, the main controller (1) displays the faults preferentially, and when the emergency start is needed, the corresponding codes are input by the remote controller according to the displayed faults.
3. The method for controlling an air conditioning system with fault diagnosis and emergency start according to claim 1, 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.
4. The control method of an air conditioning system with fault diagnosis and emergency starting according to claim 1, wherein the main controller (1) is used for ensuring the normal operation of the air conditioner by comparing the operation parameters and the built-in parameters of the compressor (18), the outdoor fan (15), the indoor fan (14), the electromagnetic expansion valve (12) and the four-way valve (13), and when judging that no hardware has a fault, the main controller (1) is used for adjusting the parameters.
5. The control method of an air conditioning system with fault diagnosis and emergency start according to claim 1, wherein the main controller (1) is restored to an initial state by inputting 2000 instructions using the remote controller when the air conditioner is suspended from the emergency start for fault maintenance.
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