CN112161377B - Unit fault classification processing method and device and air conditioning unit - Google Patents
Unit fault classification processing method and device and air conditioning unit Download PDFInfo
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- CN112161377B CN112161377B CN202010936342.XA CN202010936342A CN112161377B CN 112161377 B CN112161377 B CN 112161377B CN 202010936342 A CN202010936342 A CN 202010936342A CN 112161377 B CN112161377 B CN 112161377B
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- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 238000004378 air conditioning Methods 0.000 title claims abstract description 9
- 238000011217 control strategy Methods 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000005057 refrigeration Methods 0.000 claims abstract description 17
- 238000009423 ventilation Methods 0.000 claims abstract description 9
- 230000001276 controlling effect Effects 0.000 claims description 42
- 238000001704 evaporation Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 8
- 230000004044 response Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a unit fault classification processing method and device and an air conditioning unit. Wherein, the method comprises the following steps: after the unit fails, confirming the fault category; determining a corresponding control strategy according to the fault category; and controlling the operation of the unit according to the control strategy. According to the invention, various faults in the actual operation process of the unit are classified according to the influence range and the influence degree, and corresponding control strategies are respectively executed for different types of faults, wherein the control strategies comprise various control strategies such as normal operation, partial refrigeration, ventilation, fault shutdown and the like after the faults. Therefore, the stable operation of the unit is ensured as far as possible on the premise of safety, and the comfort of a user and the stability of the unit are improved.
Description
Technical Field
The invention relates to the technical field of air conditioning units, in particular to a unit fault classification processing method and device and an air conditioning unit.
Background
In the related art, if a fault occurs in the running process of a unit, the unit can directly enter the fault shutdown. However, the faults are divided into a plurality of types, and the operation of the unit is not affected after some faults occur, but the normal operation of the unit is sometimes affected because the faults are uniformly shut down in the prior art. The impression that the unit is prone to failure is given to the user, user experience is reduced, and reliability of the unit is reduced.
Aiming at the problem that the unit is shut down due to the fact that the unit frequently enters the fault processing mode in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for processing unit faults in a classified mode and an air conditioning unit, and aims to solve the problem that in the prior art, the unit is stopped due to the fact that the unit frequently enters fault processing.
In order to solve the technical problem, the invention provides a unit fault classification processing method, wherein the method comprises the following steps: after the unit fails, confirming the fault category; determining a corresponding control strategy according to the fault category; and controlling the operation of the unit according to the control strategy.
Further, the fault categories include: a first type of fault including at least one of: outdoor environment temperature sensing bulb failure, return air temperature sensing bulb failure; a second type of fault comprising at least one of: high-pressure alarm, low-pressure alarm and exhaust high-temperature alarm; a third type of fault comprising at least one of: high-pressure protection, low-pressure protection and exhaust high-temperature protection; a fourth type of fault comprising at least one of: and overload protection and abnormal alternating current input of the fan are realized.
Further, determining a corresponding control strategy according to the fault category includes: if the fault type is a first type fault, the corresponding control strategy is as follows: controlling the complete refrigeration operation of the unit; if the fault type is a second type of fault, the corresponding control strategy is as follows: controlling the unit part to perform refrigeration operation; if the fault type is a third type fault, the corresponding control strategy is as follows: controlling the ventilation operation of the unit; if the fault type is a fourth type of fault, the corresponding control strategy is as follows: and (5) controlling the unit to stop.
Further, the control unit fully refrigerates the operation, including: providing a preset temperature value of the temperature sensing bulb with a fault for the unit; and realizing complete refrigeration operation of the unit based on the preset temperature value, controlling the compressor to start to operate, controlling the condensing fan to start to operate, operating the evaporating fan according to a preset high level, and enabling the opening degree of the air suction regulating valve to be maximum.
Further, control the operation of the cooling of unit part, include: and controlling a compressor of the unit to start and operate, a condensing fan to start and operate, an evaporating fan to operate according to a preset high gear, and a part of load of the unit to shut down.
Further, the ventilation operation of the unit is controlled, and the method comprises the following steps: the compressor is controlled to stop until the operation parameters of the unit are recovered to normal, and then the unit is restarted, and the evaporation fan operates according to a preset high-grade position; and controlling the unloading electromagnetic valve and the liquid injection electromagnetic valve to be shut down after the compressor is shut down for a preset time, and keeping other loads of the unit in a power-down state.
Further, the control unit is shut down, including: and controlling all loads of the unit to be shut down.
Further, controlling the operation of the unit according to the control strategy comprises: monitoring the operation parameters of the unit; and after the operation parameters are recovered to be normal, controlling the unit to recover to be normal.
The invention also provides a unit fault classification processing device, wherein the device comprises: the identification module is used for confirming the fault category after the unit has a fault; the confirming module is used for determining a corresponding control strategy according to the fault category; and the control module is used for controlling the operation of the unit according to the control strategy.
The invention also provides an air conditioning unit which is characterized by comprising the unit fault classification processing device.
The invention also provides a computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the method as described above.
By applying the technical scheme of the invention, various faults in the actual operation process of the unit are classified according to the influence range and the influence degree, and corresponding control strategies are respectively executed for the different types of faults, wherein the control strategies comprise 4 control strategies of normal operation, partial refrigeration, ventilation and fault shutdown after the faults. Therefore, the stable operation of the unit is ensured as far as possible on the premise of ensuring the safety of the unit, and the comfort of a user and the stability of the unit are improved.
Drawings
FIG. 1 is a flow chart of a unit fault classification processing method according to an embodiment of the present invention;
FIG. 2 is a flow diagram of a fault classification process according to an embodiment of the invention;
fig. 3 is a block diagram of a unit fault classification processing apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
Fig. 1 is a flowchart of a unit fault classification processing method according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
and step S101, confirming the fault type after the unit has a fault.
Wherein, this embodiment classifies all kinds of troubles among the unit actual operation process according to influence scope and influence degree, and above-mentioned trouble classification includes: a first type of fault including at least one of: outdoor environment temperature sensing bulb failure, return air temperature sensing bulb failure; a second type of fault comprising at least one of: high-pressure alarm, low-pressure alarm and exhaust high-temperature alarm; a third type of fault comprising at least one of: high-pressure protection, low-pressure protection and exhaust high-temperature protection; a fourth type of fault comprising at least one of: and overload protection and abnormal alternating current input of the fan are realized.
Step S102, determining a corresponding control strategy according to the fault category; the four types of faults are corresponding to 4 control strategies of normal operation, partial refrigeration, ventilation, fault shutdown and the like after the faults.
And step S103, controlling the operation of the unit according to the control strategy.
In the embodiment, various faults in the actual operation process of the unit are classified according to the influence range and the influence degree, and corresponding control strategies are respectively executed for the faults of different types. Therefore, the stable operation of the unit is ensured as far as possible on the premise of safety, and the comfort of a user and the stability of the unit are improved.
Specifically, if the fault category is a first type of fault, the corresponding control strategy is: and controlling the complete refrigeration operation of the unit. The method specifically comprises the following steps: providing a preset temperature value of the temperature sensing bulb with a fault for the unit; the method comprises the steps of realizing complete refrigeration operation of a unit based on a preset temperature value, controlling a compressor to start to operate, controlling a condensing fan to start to operate, operating an evaporating fan according to a preset high-grade position, and enabling the opening degree of an air suction regulating valve to be maximum. The first type of fault is a fault of the thermal bulb, so that an accurate temperature value cannot be provided, and therefore, the preset temperature value is provided for the unit, and the subsequent operation of the unit can be guaranteed.
If the fault category is a second type of fault, the corresponding control strategy is as follows: and controlling the refrigerating operation of the unit part. The partial cooling operation is relative to the full cooling operation described above, i.e., the compressor capacity output is not 100%. The method specifically comprises the following steps: and controlling a compressor of the unit to start and operate, a condensing fan to start and operate, an evaporating fan to operate according to a preset high gear, and a part of load of the unit to shut down. It should be noted that, the partial load for controlling shutdown preferentially selects the load that has little influence on the cooling operation of the unit.
If the fault type is a third type of fault, the corresponding control strategy is as follows: and controlling the ventilation operation of the unit. The method specifically comprises the following steps: the compressor is controlled to stop until the operation parameters of the unit are recovered to normal, and then the unit is restarted, and the evaporation fan operates according to a preset high-grade position; and controlling the unloading electromagnetic valve and the liquid injection electromagnetic valve to be shut down after the compressor is shut down for a preset time, and keeping other loads of the unit in a power-down state.
If the fault type is the fourth type of fault, the corresponding control strategy is as follows: and (4) controlling the unit to stop, namely controlling all loads of the unit to be shut down. Because the danger coefficient of the fourth type load is higher, safety accidents are easily caused, so that the control unit is immediately stopped, and an alarm signal is sent to prompt a user to maintain.
After the operation of the unit is controlled according to the control strategy corresponding to the fault category, the operation parameters of the unit, such as temperature, pressure, voltage, current and the like, can be continuously monitored, and after the operation parameters are recovered to be normal, the fault is automatically eliminated, and the unit is controlled to recover to be normal. Therefore, the stable operation of the unit is ensured as much as possible, and unnecessary fault shutdown is avoided.
Example 2
Fig. 2 is a flowchart of a fault classification process according to an embodiment of the present invention, and as shown in fig. 2, the flowchart includes:
in order to improve the performance of the unit, the invention sets the faults into different categories and operates different units according to the categories of the faults. As shown in fig. 2, the faults of the unit are classified into A, B, C, D4 types according to the actual fault influence range of the unit. Of course, the classification of the fault categories can be adjusted according to actual needs, and the number of the categories and the composition of each type of fault can be adjusted.
And after the controller is electrified, monitoring whether the unit fails.
And if the fault does not occur, the unit normally operates.
And if the fault occurs, identifying the fault category and then executing the corresponding control strategy.
The four fault categories and the corresponding control strategies are described below.
The A-type faults are faults which do not affect the operation of the unit, and when the faults occur, the normal operation of the unit can be ensured. The A-type faults can comprise outdoor environment temperature sensing bulb faults, return air temperature sensing bulb faults and the like, corresponding values are forced to be given to the unit when the A-type faults occur, the faults of the temperature sensing bulbs are listed, if the A-type faults occur, the starting conditions or the closing conditions of the compressor of the unit need to be judged, the temperature of the compressor cannot be judged by mistake and cannot meet the starting conditions due to the fact that the compressor is closed because the temperature sensing bulbs fail to occur, therefore according to actual operation, the outdoor environment temperature can be assigned to be 50 ℃, the indoor temperature sensing bulb is assigned to be 24 ℃, and normal operation of the compressor is guaranteed. The unit can normally carry out refrigeration operation, the compressor is started, the condensing fan is started, the evaporating fan is opened according to a preset high gear, and the opening of the air suction regulating valve is 100% or the capacity output of the compressor is 100%. Of course, 100% is only the best value, and can also be set to other values such as 90% and the like, as long as the normal refrigeration operation of the unit can be ensured.
The type B fault has a certain influence on the unit, but the influence is small, and the stable operation of the unit can be maintained by reducing the operation conditions (the refrigeration effect is reduced, and the judgment conditions are relatively relaxed) or turning off part of the load, but the refrigeration effect is influenced. The type B faults comprise high-pressure alarm, low-pressure alarm, exhaust high-temperature alarm and the like, when the faults occur, corresponding protection can be caused if the unit operates according to the existing conditions, so that follow-up problems are predicted in advance and are processed in advance, at the moment, the unit needs to be started by a compressor, a condensing fan operates according to start-up logic, an evaporating fan is started at a high level, and the refrigerating capacity is adjusted to be 50% of the original capacity when other loads are in a power-off state. Of course, 50% is only the best value, and can also be set to other values such as 45% and the like, as long as the unit can realize partial refrigeration operation.
The type-C fault is a fault which is related to the compressor and can affect the performance of the compressor, so that the compressor needs to be temporarily closed, the standby group is restarted after related parameters are recovered to be normal, and at the moment, the unit can only ensure the ventilation effect. The type C faults comprise high-voltage protection, low-voltage protection, exhaust high-temperature protection and the like, the faults are related to the compressor, so that the faults can be recovered by closing the compressor, at the moment, the unit is only started to be in a high-grade state by the evaporation fan, the unloading electromagnetic valve and the liquid injection electromagnetic valve are opened for preset time (for example, 2min) and then closed after the compressor is stopped, and other loads are kept in a power-down state.
The class D faults are faults that may cause safety accidents, and include fan overload protection, ac input abnormality, and the like, and these faults represent that a power supply is connected in error or a fan is in fault, and if the fan is operated, a load may be burned down to cause other safety accidents, so that shutdown processing is required, and all loads of a unit are immediately turned off.
It should be noted that after the above fault handling scheme is executed, parameters such as pressure, temperature, and the like during operation of the unit, such as exhaust pressure, intake pressure, exhaust temperature, intake temperature, and the like, are no longer at fault edges, and when the conditions for normal operation of the unit are restored, the fault is no longer determined, and normal logic operation is performed.
Example 3
Corresponding to the unit fault classification processing method introduced in fig. 1, this embodiment provides a unit fault classification processing apparatus, as shown in a block diagram of a structure of the unit fault classification processing apparatus shown in fig. 3, the apparatus includes:
the identification module 10 is used for confirming the fault category after the unit has a fault;
a confirming module 20, configured to determine a corresponding control strategy according to the fault category;
and the control module 30 is used for controlling the operation of the unit according to the control strategy.
In the embodiment, various faults in the actual operation process of the unit are classified according to the influence range and the influence degree, and corresponding control strategies are respectively executed for the faults of different types. Therefore, the stable operation of the unit is ensured as far as possible on the premise of safety, and the comfort of a user and the stability of the unit are improved.
For the specific application of the unit fault classification processing apparatus, the foregoing embodiments have been described in detail, and are not described herein again.
The embodiment also provides an air conditioning unit, which comprises the unit fault classification processing device.
The product can execute the method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Example 4
The embodiment of the present invention provides software for implementing the technical solutions described in the above embodiments and preferred embodiments.
The embodiment of the invention provides a nonvolatile computer storage medium, wherein a computer executable instruction is stored in the computer storage medium and can execute the unit fault classification processing method in any method embodiment.
The storage medium stores the software, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A unit fault classification processing method is characterized by comprising the following steps:
after the unit fails, confirming the fault category; wherein the fault categories include: a first type of fault including at least one of: outdoor environment temperature sensing bulb failure, return air temperature sensing bulb failure; a second type of fault comprising at least one of: high-pressure alarm, low-pressure alarm and exhaust high-temperature alarm; a third type of fault comprising at least one of: high-pressure protection, low-pressure protection and exhaust high-temperature protection; a fourth type of fault comprising at least one of: fan overload protection and abnormal alternating current input;
determining a corresponding control strategy according to the fault category; which comprises the following steps: if the fault type is a first type fault, the corresponding control strategy is as follows: controlling the complete refrigeration operation of the unit; if the fault type is a second type of fault, the corresponding control strategy is as follows: controlling the unit part to perform refrigeration operation; if the fault type is a third type fault, the corresponding control strategy is as follows: controlling the ventilation operation of the unit; if the fault type is a fourth type of fault, the corresponding control strategy is as follows: controlling the unit to stop;
and controlling the operation of the unit according to the control strategy.
2. The method of claim 1, wherein controlling the unit to operate in full cooling comprises:
providing a preset temperature value of the temperature sensing bulb with a fault for the unit;
and realizing complete refrigeration operation of the unit based on the preset temperature value, controlling the compressor to start to operate, controlling the condensing fan to start to operate, operating the evaporating fan according to a preset high level, and enabling the opening degree of the air suction regulating valve to be maximum.
3. The method of claim 1, wherein controlling the partially refrigerated operation of the refrigeration unit comprises:
and controlling a compressor of the unit to start and operate, a condensing fan to start and operate, an evaporating fan to operate according to a preset high gear, and a part of load of the unit to shut down.
4. The method of claim 1, wherein controlling unit ventilation operation comprises:
the compressor is controlled to stop until the operation parameters of the unit are recovered to normal, and then the unit is restarted, and the evaporation fan operates according to a preset high-grade position; and controlling the unloading electromagnetic valve and the liquid injection electromagnetic valve to be shut down after the compressor is shut down for a preset time, and keeping other loads of the unit in a power-down state.
5. The method of claim 1, wherein controlling the unit shutdown comprises:
and controlling all loads of the unit to be shut down.
6. The method of claim 1, wherein controlling the operation of the unit according to the control strategy comprises:
monitoring the operation parameters of the unit;
and after the operation parameters are recovered to be normal, controlling the unit to recover to be normal.
7. A unit fault classification processing apparatus for implementing the unit fault classification processing method according to any one of claims 1 to 6, the apparatus comprising:
the identification module is used for confirming the fault category after the unit has a fault;
the confirming module is used for determining a corresponding control strategy according to the fault category;
and the control module is used for controlling the operation of the unit according to the control strategy.
8. An air conditioning unit characterized in that it comprises the unit fault classification processing device of claim 7.
9. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 6.
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| CN113110203B (en) * | 2021-04-27 | 2022-09-23 | 卧龙电气驱动集团股份有限公司 | Motor operation centralized control method and system |
| CN114383346B (en) * | 2021-12-27 | 2023-10-27 | 北京世纪互联宽带数据中心有限公司 | Method and device for processing fault of refrigerating unit and computer readable storage medium |
| CN114992775A (en) * | 2022-05-23 | 2022-09-02 | 珠海格力电器股份有限公司 | Fault recovery control method and equipment |
| CN115875798B (en) * | 2022-12-01 | 2024-08-16 | 珠海格力电器股份有限公司 | Air conditioner fault processing method and device and air conditioner |
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| WO2010143758A1 (en) * | 2009-06-10 | 2010-12-16 | 엘지전자 주식회사 | Motor control device of air conditioner using distributed power supply |
| CN102345915B (en) * | 2011-08-02 | 2013-11-27 | 宁波奥克斯电气有限公司 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
| CN107655142B (en) * | 2017-09-13 | 2023-06-30 | 珠海格力电器股份有限公司 | Emergency control device and method for air conditioning unit |
| CN110388773A (en) * | 2019-07-15 | 2019-10-29 | 重庆美的通用制冷设备有限公司 | Fault detection method, system and the water cooler of water cooler |
| CN110500711B (en) * | 2019-08-13 | 2023-09-08 | 珠海格力电器股份有限公司 | Temperature limiting protection control method, device and system |
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