CN112212463B - Frequency control method of variable frequency air conditioner, computer device and computer readable storage medium - Google Patents
Frequency control method of variable frequency air conditioner, computer device and computer readable storage medium Download PDFInfo
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- CN112212463B CN112212463B CN202011088298.8A CN202011088298A CN112212463B CN 112212463 B CN112212463 B CN 112212463B CN 202011088298 A CN202011088298 A CN 202011088298A CN 112212463 B CN112212463 B CN 112212463B
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000004590 computer program Methods 0.000 claims abstract description 25
- 230000000630 rising effect Effects 0.000 claims abstract description 17
- 238000004378 air conditioning Methods 0.000 abstract description 8
- 230000006870 function Effects 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method 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
- F24F11/62—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
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/70—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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a frequency control method of a variable frequency air conditioner, a computer device and a computer readable storage medium, wherein the method comprises the following steps: judging whether the current running current value of the compressor is smaller than a current protection threshold value, if so, judging whether the current running frequency of the compressor is larger than or equal to a preset frequency and is in a rising state; if the current operating frequency of the compressor is greater than or equal to the preset frequency and is in a rising state, acquiring the current operating power of the compressor in the current operating mode; and controlling the current operating frequency according to the power interval in which the current operating power is positioned. The computer device comprises a controller, and the controller is used for realizing the frequency control method of the variable frequency air conditioner when executing the computer program stored in the memory. The computer readable storage medium, on which a computer program is stored, the computer program, when executed by the controller, implementing the variable frequency air conditioner frequency control method described above. The invention can improve the operation stability and reliability of the air conditioning unit.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a frequency control method of a variable frequency air conditioner, a computer device applying the frequency control method of the variable frequency air conditioner, and a computer readable storage medium applying the frequency control method of the variable frequency air conditioner.
Background
When the operating frequency of the variable frequency air conditioner reaches a certain high-frequency stage and the operating current value of the whole machine reaches a set current protection limit value point, starting overcurrent limiting and reducing frequency protection operation, so that the operating frequency of the unit is limited to rise or reduce according to a control scheme, the stable operation of the unit is ensured to be reliable, and the service life of a compressor is prevented from being damaged.
However, if the inverter air conditioner operates at a high voltage, the power of the unit is high, but the current is low, and the operating current value of the whole inverter air conditioner cannot reach the set current protection limit point, the current limit protection cannot play a role in protection. If the air conditioner operates in a high-load working condition environment at the moment, the operating load requirement is high, the unit can continuously increase the frequency to operate, at the moment, high-frequency operation noise can be generated, even squeaking sound exists, the temperature of a winding of the compressor rises until overload tripping protection is generated to shut down, the use comfort of a user and the operation reliability and safety of the unit are seriously influenced, and the long-time high-frequency operation and the overload frequent tripping protection of the compressor damage the service life of the air conditioner.
Disclosure of Invention
The invention aims to provide a frequency control method of a variable frequency air conditioner, which can improve the operation stability and reliability of an air conditioning unit.
The second purpose of the invention is to provide a computer device for improving the operation stability and reliability of the air conditioning unit.
A third object of the present invention is to provide a computer readable storage medium for improving the operation stability and reliability of an air conditioning unit.
In order to achieve the first object, the frequency control method of the inverter air conditioner provided by the invention comprises the following steps: judging whether the current running current value of the compressor is smaller than a current protection threshold value, if so, judging whether the current running frequency of the compressor is larger than or equal to a preset frequency and is in a rising state; if the current operating frequency of the compressor is greater than or equal to the preset frequency and is in a rising state, acquiring the current operating power of the compressor in the current operating mode; and controlling the current operating frequency according to the power interval in which the current operating power is positioned.
According to the scheme, when the current operation current value does not reach the current protection threshold value, the frequency control method of the variable frequency air conditioner judges that the variable frequency air conditioner operates under the working conditions of high load and high voltage according to the current operation frequency, the current operation frequency is controlled in a segmented mode according to the current operation power of the compressor, the air conditioner is enabled to be provided with a protection barrier, and the operation stability and reliability of the air conditioning unit are improved. In addition, the current operating frequency is controlled according to the power interval where the current operating power is located, so that the operating frequency of the compressor can be maintained in the optimal operating state, the comfortable use requirement of a user is met, the damage to the compressor is avoided, and the service life is prolonged.
In a further aspect, the step of controlling the current operating frequency according to the power interval in which the current operating power is located includes: and if the current operating power is greater than or equal to the first power threshold and less than the second power threshold, controlling the current operating frequency to gradually rise by a first preset amplitude.
Therefore, when the operating frequency of the compressor is in the rising process, the operating power is also gradually raised, the rising amplitude has a gradually increasing trend, and in order to prevent the operating power from rising too fast to cause other abnormal protection of the unit, at the moment, preventive control needs to be performed, and the rising rate of the operating frequency of the compressor is limited, namely, the rising rate is slowly controlled according to a first preset amplitude.
In a further aspect, the step of controlling the current operating frequency according to the power interval in which the current operating power is located further includes: and if the current running power is greater than or equal to the second power threshold and less than the third power threshold, the compressor runs at the current running frequency.
Therefore, when the current operation power is greater than or equal to the second power threshold and less than the third power threshold, the current operation frequency is considered to cause damage to the air conditioner if the current operation frequency continues to rise, so that the rise of the current operation frequency is limited, the compressor is controlled to stably operate at the current operation frequency, and the over-high frequency of the compressor is avoided.
In a further aspect, the step of controlling the current operating frequency according to the power interval in which the current operating power is located further includes: and if the current operating power is greater than or equal to the third power threshold and less than the fourth power threshold, controlling the current operating frequency to gradually decrease by a second preset amplitude.
Therefore, when the current operating power is greater than or equal to the third power threshold and less than the fourth power threshold, the current operating frequency is considered to be too high, and the frequency reduction treatment is needed, so that the current operating frequency is controlled to gradually decrease by a second preset amplitude until the current operating frequency is decreased to a set lowest frequency point, the optimal operating state of the compressor is guaranteed, and the comfortable use requirements of users are met.
In a further aspect, the step of controlling the current operating frequency according to the power interval in which the current operating power is located further includes: and if the current running power is greater than or equal to the fourth power threshold value, stopping the compressor.
It can be seen that if the current operating power is greater than or equal to the fourth power threshold, the current operating power is considered to exceed the limit value of the compressor, and a shutdown protection process is required.
In a further aspect, after the step of controlling the compressor to stop, the method further comprises: and if the shutdown time of the compressor reaches the preset time and the current operation power is less than the second power threshold, starting the compressor to operate.
Therefore, when the shutdown time of the compressor reaches the preset time and the current running power is smaller than the second power threshold, the air conditioner is considered to be recovered to the normal state and can work again, therefore, the compressor is controlled to start and run, and the comfortable use requirement of a user is met.
In a further aspect, after the step of determining whether the current operating current value of the compressor is less than the current protection threshold, the method further includes: and if the current running current value is greater than or equal to the current protection threshold value, the compressor enters a current frequency limiting protection state.
Therefore, when the current running current value is larger than the current protection threshold value, the current frequency limiting protection is given priority, and the running stability and reliability of the air conditioning unit are ensured.
In order to achieve the second object of the present invention, the present invention provides a computer device comprising a processor and a memory, wherein the memory stores a computer program, and the computer program is executed by the processor to implement the steps of the variable frequency air conditioner frequency control method.
In order to achieve the third object of the present invention, the present invention provides a computer readable storage medium having a computer program stored thereon, the computer program, when executed by a controller, implementing the steps of the variable frequency air conditioner frequency control method described above.
Drawings
FIG. 1 is a flowchart illustrating a frequency control method for an inverter air conditioner according to an embodiment of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
The frequency control method of the variable frequency air conditioner is an application program applied to the air conditioner and used for realizing frequency control according to the running power. The invention also provides a computer device which comprises a controller, wherein the controller is used for realizing the steps of the frequency control method of the variable frequency air conditioner when executing the computer program stored in the memory. The present invention also provides a computer readable storage medium having a computer program stored thereon, the computer program, when executed by a controller, implementing the steps of the variable frequency air conditioner frequency control method described above.
The embodiment of the frequency control method of the variable frequency air conditioner comprises the following steps:
the frequency control method of the variable frequency air conditioner is an application program in the air conditioner and is used for realizing frequency control according to the running power.
As shown in fig. 1, when the frequency control method of the inverter air conditioner of the present invention is in operation, step S1 is first executed to determine whether the current operating current value of the compressor is smaller than the current protection threshold. Because the air conditioner is triggered to enter the current limit down protection state in a conventional operation state, the condition that whether the current operation current value triggers to enter the current limit down protection state needs to be judged first. When the air conditioner operates, the current operation current value of the compressor is detected in real time and is compared with the current protection threshold value in real time, so that whether the current operation current value of the compressor is smaller than the current protection threshold value or not is determined. The current protection threshold is determined by the power of the air conditioner. The current value of the operating current can be obtained by setting a detection circuit, which is a technique known to those skilled in the art and will not be described herein.
If the current operation current value is greater than or equal to the current protection threshold value, step S2 is executed to control the compressor to enter the current frequency-limiting protection state. After entering the current frequency limiting protection state, the running frequency of the compressor can be controlled according to the control mechanism, so that the compressor is protected. The means for controlling the operating frequency of the compressor according to the current value can be implemented by known technical means, and will not be described herein.
If the current operating current value of the compressor is smaller than the current protection threshold, step S3 is executed to determine whether the current operating frequency of the compressor is greater than or equal to the preset frequency and is in a rising state. In order to prevent the condition that the current operating current value does not reach the current protection threshold value but the inverter air conditioner is operated under the working condition of high load and high voltage, the condition that the inverter air conditioner is triggered to enter the current limit frequency reduction protection state cannot be reached, therefore, the current operating frequency of the compressor needs to be detected before the current operating current value does not reach the current protection threshold value so as to judge whether the compressor is operated under the working condition of high load and high voltage.
If the current operating frequency of the compressor is not greater than or equal to the preset frequency and is in the ascending state, the step S3 is continuously executed to perform continuous detection.
If the current operating frequency of the compressor is greater than or equal to the preset frequency and in the ascending state, step S4 is executed to obtain the current operating power of the compressor in the current operating mode. When the compressor is judged to be operated under the high-voltage working condition, in order to better control the frequency of the compressor, the current operation power of the compressor needs to be acquired, so that the frequency of the compressor can be controlled according to the current operation power. Under different operation modes, the air conditioner sets different limiting parameter values for power in each protection stage, so that the frequency control is more comprehensive and accurate.
After the current operation power of the compressor in the current operation mode is obtained, step S5 is executed, and the current operation frequency is controlled according to the power interval where the current operation power is located. In order to maintain the running frequency of the compressor in the optimal running state, the requirement of comfort use of a user is met, the damage to the compressor is avoided, and the current running frequency is controlled according to the power interval where the current running power is located, so that the use comfort of the user is improved, and the complaint of the user caused by the interference of high-frequency running noise and the overload frequent trip protection shutdown is avoided.
In this embodiment, the step of controlling the current operating frequency according to the power interval in which the current operating power is located includes: and if the current operating power is greater than or equal to the first power threshold and less than the second power threshold, controlling the current operating frequency to gradually rise by a first preset amplitude. The first power threshold, the second power threshold and the first preset amplitude can be set according to the actual power of the air conditioning unit and experimental test verification data. When the operating frequency of the compressor is in the rising process, the operating power is also gradually raised, and the rising amplitude has a gradually increasing trend, in order to prevent the operating power from rising too fast to cause other abnormal protection of the unit, at this time, preventive control needs to be performed, and the rising rate of the operating frequency of the compressor is limited, namely, the rising rate is slowly controlled according to a first preset amplitude.
The step of controlling the current operating frequency according to the power interval in which the current operating power is located further includes: and if the current running power is greater than or equal to the second power threshold and less than the third power threshold, the compressor runs at the current running frequency. The third power threshold may be set based on actual experimental data. When the current operating power is greater than or equal to the second power threshold and less than the third power threshold, the current operating frequency is considered to cause damage to the air conditioner if the current operating frequency continues to rise, so that the rise of the current operating frequency is limited, the compressor is controlled to stably operate at the current operating frequency, and the over-high frequency of the compressor is avoided.
The step of controlling the current operating frequency according to the power interval in which the current operating power is located further includes: and if the current operating power is greater than or equal to the third power threshold and less than the fourth power threshold, controlling the current operating frequency to gradually decrease by a second preset amplitude. And setting a fourth power threshold and a second preset amplitude according to actual experimental data. When the current operating power is greater than or equal to the third power threshold and less than the fourth power threshold, the current operating frequency is considered to be too high, and the frequency reduction treatment is needed, so that the current operating frequency is controlled to gradually decrease by a second preset amplitude until the current operating frequency is decreased to a set lowest frequency point, the optimal operating state of the compressor is guaranteed, and the comfortable use requirements of users are met.
The step of controlling the current operating frequency according to the power interval in which the current operating power is located further includes: and if the current running power is greater than or equal to the fourth power threshold value, stopping the compressor. And if the current operating power is greater than or equal to the fourth power threshold, the current operating power is considered to exceed the limit value of the compressor, and shutdown protection treatment is required.
After the step of controlling the compressor to stop, if the stop time of the compressor reaches the preset time and the current operation power is less than the second power threshold, the compressor is started to operate. The preset time is set according to actual needs. When the shutdown time of the compressor reaches the preset time and the current running power is smaller than the second power threshold, the air conditioner is considered to be recovered to the normal state and can work again, therefore, the compressor is controlled to start and run, and the comfortable use requirement of a user is met.
The embodiment of the computer device comprises:
the computer device of the embodiment comprises a controller, and the steps in the frequency control method embodiment of the variable frequency air conditioner are realized when the controller executes a computer program.
For example, a computer program may be partitioned into one or more modules, which are stored in a memory and executed by a controller to implement the present invention. One or more of the modules may be a sequence of computer program instruction segments for describing the execution of a computer program in a computer device that is capable of performing certain functions.
The computer device may include, but is not limited to, a controller, a memory. Those skilled in the art will appreciate that the computer apparatus may include more or fewer components, or combine certain components, or different components, e.g., the computer apparatus may also include input-output devices, network access devices, buses, etc.
For example, the controller may be a Central Processing Unit (CPU), other general purpose controller, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, and so on. The general controller may be a microcontroller or the controller may be any conventional controller or the like. The controller is the control center of the computer device and connects the various parts of the entire computer device using various interfaces and lines.
The memory may be used to store computer programs and/or modules, and the controller may implement various functions of the computer apparatus by executing or otherwise executing the computer programs and/or modules stored in the memory and invoking data stored in the memory. For example, the memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (e.g., a sound receiving function, a sound-to-text function, etc.), and the like; the storage data area may store data (e.g., audio data, text data, etc.) created according to the use of the cellular phone, etc. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Computer-readable storage medium embodiments:
the modules integrated by the computer apparatus of the above embodiments, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on such understanding, all or part of the flow of the above-mentioned inverter air conditioner frequency control method embodiment may also be implemented by instructing related hardware through a computer program, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a controller, the steps of the above-mentioned inverter air conditioner frequency control method embodiment may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The storage medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
Therefore, when the current operation current value does not reach the current protection threshold value, the frequency control method of the variable frequency air conditioner judges that the variable frequency air conditioner operates under the working conditions of high load and high voltage according to the current operation frequency, and controls the current operation frequency in a segmented mode according to the current operation power of the compressor, so that the air conditioner is provided with a protection barrier, and the operation stability and reliability of the air conditioning unit are improved. In addition, the current operating frequency is controlled according to the power interval where the current operating power is located, so that the operating frequency of the compressor can be maintained in the optimal operating state, the comfortable use requirement of a user is met, the damage to the compressor is avoided, and the service life is prolonged.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept also fall within the protection scope of the present invention.
Claims (9)
1. A frequency control method of a variable frequency air conditioner is characterized by comprising the following steps: the method comprises the following steps:
judging whether the current running current value of the compressor is smaller than a current protection threshold value, if so, judging whether the current running frequency of the compressor is larger than or equal to a preset frequency and is in a rising state;
if the current operating frequency of the compressor is greater than or equal to the preset frequency and is in a rising state, acquiring the current operating power of the compressor in the current operating mode;
and controlling the current operation frequency according to the power interval where the current operation power is located.
2. The frequency control method of the inverter air conditioner according to claim 1, wherein:
the step of controlling the current operating frequency according to the power interval in which the current operating power is located includes:
and if the current operating power is greater than or equal to a first power threshold and less than a second power threshold, controlling the current operating frequency to gradually rise by a first preset amplitude.
3. The frequency control method of the inverter air conditioner according to claim 2, wherein:
the step of controlling the current operating frequency according to the power interval in which the current operating power is located further includes:
and if the current running power is greater than or equal to a second power threshold and less than a third power threshold, the compressor runs at the current running frequency.
4. The frequency control method of the inverter air conditioner according to claim 3, wherein:
the step of controlling the current operating frequency according to the power interval in which the current operating power is located further includes:
and if the current operating power is greater than or equal to a third power threshold and less than a fourth power threshold, controlling the current operating frequency to gradually decrease by a second preset amplitude.
5. The frequency control method of the inverter air conditioner according to claim 4, wherein:
the step of controlling the current operating frequency according to the power interval in which the current operating power is located further includes:
and if the current running power is greater than or equal to the fourth power threshold, stopping the compressor.
6. The frequency control method of the inverter air conditioner according to claim 5, wherein:
after the step of controlling the compressor to stop, the method further comprises:
and if the shutdown time of the compressor reaches a preset time and the current operation power is less than the second power threshold, starting the compressor to operate.
7. The frequency control method of the inverter air conditioner according to any one of claims 1 to 6, wherein:
after the step of determining whether the current operating current value of the compressor is less than the current protection threshold, the method further includes:
and if the current running current value is greater than or equal to the current protection threshold value, the compressor enters a current frequency limiting protection state.
8. A computer device comprising a processor and a memory, wherein: the memory stores a computer program which, when executed by the processor, implements the steps of the inverter air conditioner frequency control method according to any one of claims 1 to 7.
9. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program, when executed by a controller, implements the steps of the inverter air conditioner frequency control method of any one of claims 1 to 7.
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| CN113606741A (en) * | 2021-08-04 | 2021-11-05 | 宁波奥克斯电气股份有限公司 | Control method of compressor frequency, air conditioner and computer readable storage medium |
| CN114234357A (en) * | 2021-12-24 | 2022-03-25 | 珠海格力电器股份有限公司 | Air conditioner self-adaptive operation and maintenance method, air conditioner and computer readable storage medium |
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