CN111981649B - Air conditioner, air conditioner control method, control device and readable storage medium - Google Patents
Air conditioner, air conditioner control method, control device and readable storage medium Download PDFInfo
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- CN111981649B CN111981649B CN201910430605.7A CN201910430605A CN111981649B CN 111981649 B CN111981649 B CN 111981649B CN 201910430605 A CN201910430605 A CN 201910430605A CN 111981649 B CN111981649 B CN 111981649B
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000005057 refrigeration Methods 0.000 claims abstract description 11
- 238000004378 air conditioning Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 description 12
- 230000009467 reduction Effects 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003287 optical effect 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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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
- F24F11/54—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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/70—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
- F24F11/70—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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
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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)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner control method, which comprises the following steps: acquiring the operating frequency of a compressor, the inlet temperature of an evaporator and the outlet temperature of the evaporator; when the operating frequency is greater than a preset frequency threshold, judging whether the rotating speed of the outdoor fan needs to be reduced according to the inlet temperature and the outlet temperature; and if the rotating speed of the outdoor fan is judged to be required to be reduced, controlling the outdoor fan to reduce the rotating speed. The invention also discloses an air conditioner control device, an air conditioner and a readable storage medium. The invention aims to improve the energy efficiency of a refrigeration system and increase the running reliability of the system.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to an air conditioning control method, an air conditioning control device, an air conditioner, and a readable storage medium.
Background
With the development of technology, new refrigerants (such as R32 refrigerant) are widely used due to their excellent performance. Compared with the traditional refrigerant injection quantity, the novel refrigerant injection quantity is less, and the reduction of the refrigerant injection quantity can lead to the reduction of the overall refrigerant flow of the refrigerating system. Meanwhile, as the heat exchanger of the air conditioner becomes more compact, the demand for high capacity output of the refrigeration system is gradually increased. In order to realize high-capacity output of refrigeration, the air conditioner generally maintains the indoor fan and the outdoor fan to operate at high rotation speeds, and the rotation speed of the fan is generally maintained at a maximum rotation speed value so as to achieve maximum heat exchange capacity. However, when the air conditioner is used for refrigerating and evaporating, the refrigerant flow is small, meanwhile, the fan keeps high-rotation-speed operation, so that the refrigerating system is in an overheat state when the refrigerating system is evaporated, even if the frequency of the compressor is increased, the refrigerating capacity is also increased slightly, the energy efficiency of the refrigerating system is poor, the exhaust temperature of the compressor is increased due to evaporation overheat, and the reliability of the system operation is reduced.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide an air conditioner control method which aims to improve the energy efficiency of a refrigerating system and increase the running reliability of the system.
In order to achieve the above object, the present invention provides an air conditioner control method comprising the steps of:
acquiring the operating frequency of a compressor, the inlet temperature of an evaporator and the outlet temperature of the evaporator;
When the operating frequency is greater than a preset frequency threshold, judging whether the rotating speed of the outdoor fan needs to be reduced according to the inlet temperature and the outlet temperature;
and if the rotating speed of the outdoor fan is judged to be required to be reduced, controlling the outdoor fan to reduce the rotating speed.
Optionally, when the operating frequency is greater than a preset frequency threshold, after the step of judging whether the rotation speed of the outdoor fan needs to be reduced according to the inlet temperature and the outlet temperature, the method further includes:
And if the judgment that the rotation speed of the outdoor fan does not need to be reduced, controlling the outdoor fan to maintain the current rotation speed to operate.
Optionally, after the step of controlling the outdoor fan to maintain the current rotation speed, the method further includes: acquiring the current exhaust temperature of the compressor;
judging whether the exhaust temperature is greater than or equal to a preset temperature threshold;
if yes, controlling the compressor to reduce the operating frequency;
if not, controlling the compressor to maintain the operating frequency.
Optionally, the step of controlling the compressor to reduce the operating frequency includes:
Obtaining a compressor adjustment coefficient;
According to a preset frequency adjustment amplitude and the compressor adjustment coefficient, determining the adjustment amplitude of the compressor frequency as a first adjustment amplitude;
controlling the compressor to reduce the operating frequency according to the first adjustment amplitude.
Optionally, after the step of controlling the compressor to reduce the operating frequency according to the first adjustment amplitude, the method further comprises:
and a first target time period is spaced, and the step of judging whether the exhaust temperature is greater than or equal to a preset temperature threshold value is carried out.
Optionally, the step of obtaining the compressor adjustment coefficient includes:
Acquiring an adjustment coefficient of the compressor in the last frequency-reducing operation;
And determining the compressor adjustment coefficient according to the adjustment coefficient of the compressor in the last down-conversion operation and a first preset value.
Optionally, the step of obtaining the compressor adjustment coefficient includes:
And when the exhaust temperature is judged to be greater than or equal to the preset temperature threshold for the first time, acquiring the compressor adjustment coefficient according to the current exhaust temperature of the compressor.
Optionally, the step of determining whether the rotation speed of the outdoor fan needs to be reduced according to the inlet temperature and the outlet temperature includes:
Judging whether the inlet temperature is smaller than the outlet temperature;
and if the inlet temperature is smaller than the outlet temperature, judging that the rotating speed of the outdoor fan needs to be reduced.
Optionally, the step of controlling the outdoor fan to reduce the rotation speed includes:
acquiring an outdoor fan adjusting coefficient;
according to the preset rotating speed adjusting amplitude and the outdoor fan adjusting coefficient, determining the adjusting amplitude of the rotating speed of the outdoor fan as a second adjusting amplitude;
and controlling the outdoor fan to reduce the rotating speed according to the second adjusting amplitude.
Optionally, after the step of controlling the outdoor fan to reduce the rotation speed according to the second adjustment amplitude, the method further includes:
A second target time length is spaced, and the step of judging whether the rotating speed of the outdoor fan needs to be reduced or not according to the inlet temperature and the outlet temperature is carried out in a returning mode;
the step of obtaining the outdoor fan adjustment coefficient comprises the following steps:
Acquiring an adjustment coefficient of the outdoor fan during last speed-down operation;
and determining the outdoor fan adjusting coefficient according to the adjusting coefficient of the outdoor fan in the last speed-down operation and a second preset value.
Optionally, before the step of obtaining the current operating frequency of the compressor, the inlet temperature of the evaporator and the outlet temperature of the evaporator of the air conditioner, the method further comprises:
Acquiring the current power-on operation time of the air conditioner;
and when the power-on operation time is longer than or equal to the preset time, executing the step of acquiring the current operation frequency of the compressor, the inlet temperature of the evaporator and the outlet temperature of the evaporator of the air conditioner.
In order to achieve the above object, the present application also provides an air conditioner control device including: the air conditioner control method comprises a memory, a processor and an air conditioner control program which is stored in the memory and can run on the processor, wherein the air conditioner control program realizes the steps of the air conditioner control method when being executed by the processor.
In addition, in order to achieve the above object, the present application also proposes an air conditioner including the air conditioner control device as described above.
In addition, in order to achieve the above object, the present application also proposes a readable storage medium having stored thereon an air conditioning control program which, when executed by a processor, implements the steps of the air conditioning control method according to any one of the above.
According to the air conditioner control method provided by the embodiment of the invention, when the operation frequency of the compressor is larger than the preset frequency threshold, whether the rotation speed of the outdoor fan needs to be reduced is judged according to the inlet temperature of the evaporator and the outlet temperature of the evaporator, and if the rotation speed of the outdoor fan needs to be reduced, the rotation speed of the outdoor fan is reduced. The operation frequency of the compressor can be used for representing the refrigerating output capacity of the refrigerating system, when the refrigerating output capacity is higher, the outlet temperature and the inlet temperature of the comprehensive evaporator can accurately reflect whether the refrigerating system is overheated by evaporation, under the condition, the rotating speed of the outdoor fan is reduced when the rotating speed of the outdoor fan is required to be reduced, even if the refrigerating system is operated with less refrigerant quantity in high-capacity output, the evaporator is prevented from being in an overheated state due to the overhigh rotating speed of the outdoor fan, so that the system can reach higher refrigerating capacity, the exhaust temperature of the system is reduced, and the operation reliability of the system is improved.
Drawings
FIG. 1 is a schematic diagram of a hardware configuration of an embodiment of an air conditioner control device according to the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of an air conditioner control method according to the present invention;
FIG. 3 is a flow chart of a second embodiment of the air conditioner control method of the present invention;
FIG. 4 is a flow chart of a third embodiment of an air conditioner control method according to the present invention;
FIG. 5 is a flowchart of a fourth embodiment of an air conditioner control method according to the present invention;
FIG. 6 is a flowchart of a fifth embodiment of an air conditioner control method according to the present invention;
fig. 7 is a flowchart of a sixth embodiment of an air conditioner control method according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The main solutions of the embodiments of the present invention are: acquiring the operating frequency of a compressor, the inlet temperature of an evaporator and the outlet temperature of the evaporator; when the operating frequency is greater than a preset frequency threshold, judging whether the rotating speed of the outdoor fan needs to be reduced according to the inlet temperature and the outlet temperature; and if the rotating speed of the outdoor fan is judged to be required to be reduced, controlling the outdoor fan to reduce the rotating speed.
In the prior art, when the refrigerant amount in the refrigeration system is small but the system is in high-capacity output operation, the problems of poor air conditioner energy efficiency and reduced reliability can occur.
The invention provides the solution, which aims to improve the energy efficiency of the refrigeration system and the operational reliability of the system.
The invention provides an air conditioner control device which can be applied to heat pump systems such as air conditioners with refrigeration regulation function.
In an embodiment of the present invention, referring to fig. 1, an air conditioner control device includes: a processor 1001 such as a CPU, a memory 1002, a temperature sensor 1003, a timer 1004, and the like. The memory 1002 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1002 may alternatively be a storage device separate from the processor 1001 described above.
The temperature sensor 1003 may specifically include a first sensor, a second sensor, and a third sensor, and the first sensor may be provided at an inlet of the evaporator to detect an inlet temperature of the evaporator; the second sensor can be arranged at the outlet of the evaporator to detect the outlet temperature of the evaporator; the third sensor is used for being arranged at a refrigerant outlet of the compressor so as to detect the exhaust temperature of the compressor.
The timer 1004 is specifically configured to count a duration of time after the air conditioner is powered on, and an interval duration after the compressor is down-scaled or the outdoor fan is down.
The processor 1001 is communicatively connected to the memory 1002, the temperature sensor 1003, and the timer 1004, respectively. The processor 1001 may acquire temperature data collected by the temperature sensor 1003, may acquire time data counted by the timer 1004, and may read time data from the timer 1004. Temperature data, time data, adjustment coefficients, preset time thresholds, etc. acquired by the processor 1001 may also be stored in the memory 1002 as needed. In addition, the processor 1001 may be connected to a control device of the compressor and the outdoor fan to read the compressor operating frequency and the fan rotational speed.
It will be appreciated by those skilled in the art that the device structure shown in fig. 1 is not limiting of the device and may include more or fewer components than shown, or may be combined with certain components, or a different arrangement of components.
As shown in fig. 1, an air conditioner control program may be included in a memory 1002 as a readable storage medium. In the apparatus shown in fig. 1, a processor 1001 may be used to call an air conditioner control program stored in a memory 1002 and perform the relevant step operations of the air conditioner control method of the following embodiments.
The invention also provides an air conditioner control method.
Referring to fig. 2, a first embodiment of the air conditioner control method of the present invention is presented, the air conditioner control method comprising:
step S10, acquiring the operation frequency of a compressor, the inlet temperature of an evaporator and the outlet temperature of the evaporator;
Specifically, after the air conditioner is powered on or when the user set temperature is less than or equal to the preset temperature and the rotation speed is at the highest gear, the current operation mode of the air conditioner is obtained first, and when the operation mode is the refrigeration mode, the step S10 is executed.
The inlet temperature of the evaporator is the temperature value at the inlet of the evaporator; the outlet temperature of the evaporator is the temperature value at the outlet of the evaporator. In addition, the current rotating speed of the outdoor fan can be obtained as a reference value for rotating speed adjustment.
Step S20, judging whether the rotating speed of the outdoor fan needs to be reduced or not according to the inlet temperature and the outlet temperature when the operating frequency is larger than a preset frequency threshold value; if it is determined that the fan rotation speed needs to be reduced, executing step S30; if it is determined that the fan rotation speed does not need to be reduced, step S40 is performed.
Here, the preset frequency threshold is a rated operation frequency of the compressor at the time of cooling operation of the air conditioner. When the operating frequency is less than or equal to a preset frequency threshold, the compressor can be controlled to maintain the current operating frequency, and the outdoor fan is controlled to maintain the current rotating speed to operate.
Specifically, the superheat degree in the evaporator can be calculated according to the inlet temperature and the outlet temperature, and whether the rotating speed of the outdoor fan needs to be reduced or not is judged according to the superheat degree. When the superheat degree is larger than or equal to a preset threshold value, the evaporator is in a overheat state with lower energy efficiency, and the rotating speed of the outdoor fan is judged to need to be reduced; and when the superheat degree is smaller than a preset threshold value, the evaporator is not in a superheat state, and the rotation speed of the outdoor fan is judged not to be required to be reduced. In addition, whether the rotation speed of the outdoor fan needs to be reduced can be judged according to the temperature difference or the magnitude relation between the inlet temperature of the evaporator and the outlet temperature of the evaporator.
Step S30, controlling the outdoor fan to reduce the rotating speed;
specifically, the rotation speed of the outdoor fan can be directly reduced to a preset rotation speed, and the reduction of the rotation speed of the outdoor fan can be realized according to the preset rotation speed adjustment range.
And S40, controlling the outdoor fan to maintain the current rotation speed to operate.
According to the air conditioner control method provided by the embodiment of the invention, when the operation frequency of the compressor is larger than the preset frequency threshold, whether the rotation speed of the outdoor fan needs to be reduced is judged according to the inlet temperature of the evaporator and the outlet temperature of the evaporator, and if the rotation speed of the outdoor fan needs to be reduced, the rotation speed of the outdoor fan is reduced. The operation frequency of the compressor can be used for representing the refrigerating output capacity of the refrigerating system, when the refrigerating output capacity is higher, the outlet temperature and the inlet temperature of the comprehensive evaporator can accurately reflect whether the refrigerating system is overheated by evaporation, under the condition, the rotating speed of the outdoor fan is reduced when the rotating speed of the outdoor fan is required to be reduced, even if the refrigerating system is operated with less refrigerant quantity in high-capacity output, the evaporator is prevented from being in an overheated state due to the overhigh rotating speed of the outdoor fan, so that the system can reach higher refrigerating capacity, the exhaust temperature of the system is reduced, and the operation reliability of the system is improved.
Further, in the first embodiment, step S01 may be further included before executing step S10, where the current power-on operation duration of the air conditioner is obtained, step S02 is executed, whether the power-on operation duration is greater than or equal to a preset duration is determined, and when the power-on operation duration is greater than or equal to the preset duration, step S10 is executed. The preset duration may be determined according to the cooling output efficiency of the air conditioner. The step S10 is executed when the power-on operation time of the air conditioner reaches the first preset time, so that the refrigerating system is guaranteed to be in a stable operation state, the phenomenon that the rotation speed is reduced when each part in the refrigerating system does not reach the output capacity required by the heat exchange requirement on the part is avoided, the heat exchange efficiency of the air conditioner during starting is influenced, the accuracy of rotation speed adjustment is guaranteed, and the improvement of the energy efficiency and the operation reliability of the air conditioner is guaranteed.
Further, based on the first embodiment, a second embodiment of the air conditioner control method of the present application is proposed. In the second embodiment, referring to fig. 3, after step S40, the method further includes:
step S50, obtaining the current exhaust temperature of the compressor;
the exhaust temperature is specifically the temperature value of the gaseous refrigerant at the outlet of the compressor.
Step S60, judging whether the exhaust temperature is greater than or equal to a preset temperature threshold;
If yes, step S70 is executed, and if no, step S80 is executed.
Step S70, controlling a compressor to reduce the operating frequency;
Specifically, the operating frequency can be directly reduced to a preset frequency, or the operating frequency can be reduced according to the preset frequency adjustment amplitude. The corresponding preset frequency adjustment amplitude can be obtained according to the exhaust temperature, and the operation frequency of the compressor is reduced according to the obtained preset frequency adjustment amplitude.
And step S80, controlling the compressor to maintain the operation frequency.
In this embodiment, when the discharge temperature of the compressor is too high, the operation frequency of the compressor is reduced, so that the discharge temperature of the compressor is reduced, and the operation reliability of the refrigeration system is improved.
Further, based on the second embodiment, a third embodiment of the air conditioner control method of the present application is proposed. In a third embodiment, referring to fig. 4, the step S70 includes:
step S71, obtaining a compressor adjustment coefficient;
The compressor adjustment coefficient can have different values according to the adaptability of different running states of the air conditioner. Specifically, a corresponding compressor adjustment factor may be determined based on a current discharge temperature of the compressor. Different temperature intervals correspond to different compressor adjustment coefficients, and the larger the exhaust temperature is, the larger the corresponding compressor adjustment coefficient is. The corresponding compressor adjustment factor may further be obtained based on the exhaust temperature, and the temperature difference between the inlet temperature and the outlet temperature of the evaporator.
Step S72, determining the adjustment amplitude of the compressor frequency as a first adjustment amplitude according to a preset frequency adjustment amplitude and the compressor adjustment coefficient;
The preset frequency adjustment range is specifically the frequency adjustment range of the compressor under the set working conditions (such as set exhaust temperature, set frequency adjustment times, current rotation speed of the indoor or outdoor fan and the like) according to a large amount of data analysis. The compressor adjustment coefficient is used for adjusting the preset frequency adjustment amplitude, and is suitable for being obtained by the compressor under the current working condition (such as the current exhaust temperature, the current frequency adjustment times, the current rotating speed of the indoor or outdoor fan and the like), so as to obtain the target adjustment amplitude of the compressor frequency.
The product of the preset frequency adjustment amplitude and the compressor adjustment coefficient can be used as the first adjustment amplitude.
And step S73, controlling the compressor to reduce the operating frequency according to the first adjustment amplitude.
And (2) subtracting the first adjustment amplitude from the operation frequency of the compressor acquired in the step (S10) to obtain a target frequency, and controlling the compressor to operate according to the target frequency.
In this embodiment, the first adjustment amplitude is determined by combining the preset frequency adjustment amplitude and the compressor adjustment coefficient, so that the air conditioner can have better refrigeration output capability while reducing the exhaust temperature after the frequency of the compressor is reduced. The corresponding compressor adjustment coefficient is obtained according to the exhaust temperature and/or the temperature difference between the inlet temperature and the outlet temperature of the evaporator, so that the adjustment of the compressor frequency can be adapted to the running condition of the current refrigerating system, the adjustment is more accurate, and the energy efficiency and the reliability of the refrigerating system are further improved.
Further, based on the third embodiment, a fourth embodiment of the air conditioner control method of the present application is proposed. In the fourth embodiment, referring to fig. 5, after step S73, the method further includes:
and a first target time period is spaced, and the step of judging whether the exhaust temperature is greater than or equal to a preset temperature threshold value is carried out.
The first target duration may be a preset fixed value, and specifically set to be greater than the preset duration. In addition, the first target time period may also be preferably determined according to the preset time period and the compressor adjustment coefficient described above.
When it is determined that the rotation speed of the fan needs to be reduced again, the step of obtaining the adjustment coefficient of the compressor includes:
step S711, obtaining an adjustment coefficient of the compressor in the last down-conversion operation;
The compressor adjustment coefficient may have an initial value, and the compressor adjustment coefficient may be initialized to an initial value each time the air conditioner is powered on or when an initialization command generated based on a setting parameter input by a user is acquired. For example, when the user-set temperature is less than or equal to the preset temperature and the rotational speed is at the highest gear, an initialization command may be generated. When the compressor adjustment coefficient is not first determined to be reduced according to the compressor operation frequency, the inlet temperature of the evaporator, the outlet temperature of the evaporator and the exhaust temperature after the initialization (after power-on), the compressor adjustment coefficient obtained when the compressor operation frequency is required to be reduced according to the compressor operation frequency, the inlet temperature of the evaporator, the outlet temperature of the evaporator and the exhaust temperature is determined last time can be used as the adjustment coefficient when the compressor is in the last frequency-reducing operation.
In addition, when the exhaust temperature is determined to be greater than or equal to the preset temperature threshold value for the first time (i.e. the compressor needs to be operated in a frequency-reducing mode), a corresponding compressor adjustment coefficient can be obtained according to the exhaust temperature. The greater the discharge temperature value, the greater the compressor adjustment factor.
Step S712, determining the compressor adjustment coefficient according to the adjustment coefficient and the first preset value when the compressor was last down-converting.
When the operation frequency of the compressor needs to be reduced according to the operation frequency of the compressor, the inlet temperature of the evaporator, the outlet temperature of the evaporator and the exhaust temperature for the first time after the initialization of the compressor adjustment coefficient (after power-on), the compressor adjustment coefficient of the compressor can be an initial value, and the sum of the initial value and a preset value can be used as the compressor adjustment coefficient.
When the operation frequency of the compressor needs to be reduced according to the operation frequency of the compressor, the inlet temperature of the evaporator, the outlet temperature of the evaporator and the exhaust temperature for the non-first time after the initialization of the adjustment coefficient of the compressor (after the power-on), the sum of the adjustment coefficient of the compressor in the last speed-down operation and a preset value can be used as the adjustment coefficient of the compressor.
The preset value can be set to a fixed value according to actual adjustment requirements, and can also be determined according to the current exhaust temperature of the compressor.
By the mode, the running reliability of the air conditioner can be continuously monitored, and the running frequency of the compressor can be adaptively adjusted. And when the reliability of the air conditioner is poor, the running frequency of the compressor is gradually reduced, so that the air conditioner can be ensured to have the refrigerating output capacity as large as possible while the energy efficiency and the reliability of the air conditioner are improved. After the effect of the compressor on the refrigerating system is balanced by setting the first target duration, whether the refrigerating system needs to be subjected to frequency reduction again is judged again only when the refrigerating system is in a stable running state, and the accuracy of the frequency adjustment of the compressor can be realized. The first target duration is determined by combining the compressor adjustment coefficient consistent with the compressor frequency adjustment, so that the first target duration can be adjusted synchronously according to the reduction degree of the frequency, the energy efficiency state of the refrigerating system can be judged timely and accurately, the accuracy of fan rotation speed adjustment is ensured, and the energy efficiency and the reliability of the refrigerating system are effectively improved.
Further, based on any one of the above embodiments, a fifth embodiment of the air conditioner control method of the present application is provided. In a fifth embodiment, referring to fig. 6, the step of determining whether the rotation speed of the outdoor fan needs to be reduced according to the inlet temperature and the outlet temperature includes:
Step S21, judging whether the inlet temperature is smaller than the outlet temperature;
If the inlet temperature is smaller than the outlet temperature, judging that the rotating speed of the outdoor fan needs to be reduced, and executing step S30; if the inlet temperature is greater than or equal to the outlet temperature, judging that the rotating speed of the outdoor fan needs to be reduced; step S50 is performed.
Wherein, the step S30 includes:
Step S31, obtaining an outdoor fan adjustment coefficient;
The adjusting coefficient of the outdoor fan can have different values according to the adaptability of different running states of the air conditioner. For example, the corresponding outdoor fan adjustment coefficient may be obtained according to the current temperature difference between the inlet temperature and the outlet temperature of the evaporator, different temperature differences correspond to different outdoor fan adjustment coefficients, and the larger the temperature difference is, the larger the corresponding outdoor fan adjustment coefficient may be.
Step S32, determining the adjustment amplitude of the rotating speed of the outdoor fan as a second adjustment amplitude according to the preset rotating speed adjustment amplitude and the outdoor fan adjustment coefficient;
the preset rotation speed adjustment range is specifically the adjustment range of the fan under the set working conditions (such as set exhaust temperature, set frequency, set adjustment times, current rotation speed of the indoor or outdoor fan and the like) according to a large amount of data analysis. The fan adjusting coefficient is used for adjusting the preset rotating speed adjusting amplitude, and is suitable for being obtained by the outdoor fan under the current working condition (such as the current exhaust temperature, the current adjusting times, the current rotating speed of the indoor or outdoor fan and the like), so as to obtain the target adjusting amplitude of the fan.
The product of the preset rotation speed adjustment amplitude and the outdoor fan adjustment coefficient can be used as a second adjustment amplitude.
And step S33, controlling the outdoor fan to reduce the rotating speed according to the second adjusting amplitude.
And (3) directly subtracting the corresponding second adjustment amplitude from the rotating speed of the indoor fan obtained in the step (S10) to obtain the target rotating speed of the outdoor fan, and controlling the outdoor fan to operate according to the target rotating speed so as to reduce the rotating speed of the outdoor fan.
In this embodiment, the second adjustment range is determined according to the preset rotation speed adjustment range and the outdoor fan adjustment coefficient, so that it is ensured that the energy efficiency of the air conditioner can be improved after the rotation speed of the outdoor fan is reduced.
Further, based on the fifth embodiment described above, a sixth embodiment of the air conditioner control method of the present application is proposed. In a sixth embodiment, referring to fig. 7, after the step of controlling the outdoor fan to reduce the rotation speed according to the second adjustment range, the method further includes:
A second target time length is spaced, and the step of judging whether the rotating speed of the outdoor fan needs to be reduced or not according to the inlet temperature and the outlet temperature is carried out in a returning mode;
When it is determined that the rotation speed of the outdoor fan needs to be reduced again, the step of obtaining the adjustment coefficient of the outdoor fan includes:
step S311, obtaining an adjustment coefficient of the outdoor fan during the last speed-down operation;
The outdoor fan adjustment coefficient may have an initial value, and when the air conditioner is powered on each time or an initialization instruction generated based on a setting parameter input by a user is acquired, the outdoor fan adjustment coefficient may be initialized, so that the value of the outdoor fan adjustment coefficient is the initial value. For example, when the user-set temperature is less than or equal to the preset temperature and the rotational speed is at the highest gear, an initialization command may be generated. When the outdoor fan adjusting coefficient is initialized (after power-on) and the outdoor fan rotating speed is not judged to be required to be reduced according to the compressor operating frequency, the inlet temperature of the evaporator and the outlet temperature of the evaporator for the first time, the outdoor fan adjusting coefficient obtained when the outdoor fan rotating speed is judged to be required to be reduced according to the compressor operating frequency, the inlet temperature of the evaporator and the outlet temperature of the evaporator for the last time can be used as the adjusting coefficient when the outdoor fan is in the last time of speed reduction operation.
In addition, when the outdoor fan is judged to be in need of down running for the first time, the temperature difference value of the inlet temperature and the outlet temperature can be determined; and acquiring an outdoor fan adjusting coefficient of the outdoor fan according to the temperature difference value. The larger the temperature difference value is, the larger the outdoor fan adjusting coefficient is when the outdoor fan is operated at the first time of speed reduction.
Step S312, determining the outdoor fan adjusting coefficient according to the adjusting coefficient of the outdoor fan in the last speed-down operation and a second preset value.
When the outdoor fan rotation speed needs to be reduced according to the compressor running frequency, the inlet temperature of the evaporator and the outlet temperature of the evaporator for the first time after the outdoor fan adjustment coefficient is initialized (after the power-on), the outdoor fan adjustment coefficient of the outdoor fan can be an initial value, and the sum of the initial value and a preset value can be used as the outdoor fan adjustment coefficient.
When the outdoor fan adjusting coefficient is initialized (after power-on) and the outdoor fan rotating speed needs to be reduced according to the compressor operating frequency, the inlet temperature of the evaporator and the outlet temperature of the evaporator for the non-first time, the sum of the adjusting coefficient and a preset value when the outdoor fan is in the last speed-down operation can be used as the outdoor fan adjusting coefficient.
The preset value can be set to be a fixed value according to actual requirements, and can also be determined according to the current temperature difference between the outlet temperature and the inlet temperature of the evaporator.
By the mode, the energy efficiency condition of the air conditioner can be continuously monitored, and the rotating speed of the outdoor fan can be adaptively adjusted. The rotating speed of the outdoor fan can be gradually reduced when the energy efficiency of the air conditioner is poor, so that the energy efficiency and the reliability of the air conditioner are improved, and the air conditioner is ensured to have the heat exchange capacity as large as possible.
In addition, the embodiment of the invention also provides an air conditioner which comprises an outdoor fan, a compressor and the air conditioner control device in the embodiment. The air conditioner control device is respectively connected with the outdoor fan, the compressor and the like to acquire the operation data of each component and simultaneously control the operation of the component according to the relevant steps in any embodiment of the air conditioner control method.
In addition, the embodiment of the invention also provides a readable storage medium, wherein the readable storage medium stores an air conditioner control program, and the air conditioner control program realizes the relevant steps of any embodiment of the air conditioner control method when being executed by a processor.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (13)
1. An air conditioner control method, characterized by comprising the following steps:
when the operation mode of the air conditioner is a refrigeration mode, acquiring the operation frequency of the compressor, the inlet temperature of the evaporator and the outlet temperature of the evaporator;
When the running frequency is greater than a preset frequency threshold value, calculating the superheat degree in the evaporator according to the inlet temperature and the outlet temperature, and judging whether the rotating speed of the outdoor fan needs to be reduced according to the superheat degree;
And when the superheat degree is greater than or equal to a preset threshold value, controlling the outdoor fan to reduce the rotating speed.
2. The air conditioner control method as set forth in claim 1, wherein after the step of judging whether the rotation speed of the outdoor fan needs to be reduced according to the degree of superheat, further comprising:
and when the superheat degree is smaller than a preset threshold value, controlling the outdoor fan to maintain the current rotating speed to operate.
3. The air conditioner control method as set forth in claim 2, further comprising, after said step of controlling said outdoor fan to maintain a current rotational speed operation:
acquiring the current exhaust temperature of the compressor;
judging whether the exhaust temperature is greater than or equal to a preset temperature threshold;
if yes, controlling the compressor to reduce the operating frequency;
if not, controlling the compressor to maintain the operating frequency.
4. The air conditioner control method as set forth in claim 3, wherein said step of controlling the compressor to reduce the operating frequency includes:
Obtaining a compressor adjustment coefficient;
According to a preset frequency adjustment amplitude and the compressor adjustment coefficient, determining the adjustment amplitude of the compressor frequency as a first adjustment amplitude;
controlling the compressor to reduce the operating frequency according to the first adjustment amplitude.
5. The air conditioner control method as set forth in claim 4, further comprising, after the step of controlling the compressor to decrease the operating frequency in accordance with the first adjustment amplitude:
and a first target time period is spaced, and the step of judging whether the exhaust temperature is greater than or equal to a preset temperature threshold value is carried out.
6. The air conditioner control method as set forth in claim 5, wherein said step of acquiring the adjustment coefficient of the compressor includes:
Acquiring an adjustment coefficient of the compressor in the last frequency-reducing operation;
And determining the compressor adjustment coefficient according to the adjustment coefficient of the compressor in the last down-conversion operation and a first preset value.
7. The air conditioner control method as set forth in claim 6, wherein said step of acquiring the adjustment coefficient of the compressor includes:
And when the exhaust temperature is judged to be greater than or equal to the preset temperature threshold for the first time, acquiring the compressor adjustment coefficient according to the current exhaust temperature of the compressor.
8. The air conditioner control method as set forth in any one of claims 1 to 7, wherein the step of controlling the outdoor fan to reduce the rotation speed includes:
acquiring an outdoor fan adjusting coefficient;
Determining the adjusting amplitude of the rotating speed of the outdoor fan according to the preset rotating speed adjusting amplitude and the outdoor fan adjusting coefficient, and taking the adjusting amplitude as a second adjusting amplitude;
and controlling the outdoor fan to reduce the rotating speed according to the second adjusting amplitude.
9. The air conditioner control method as set forth in claim 8, wherein after said step of controlling said outdoor fan to decrease the rotation speed according to said second adjustment range, further comprising:
The second target duration is spaced, and the step of calculating the superheat degree in the evaporator according to the inlet temperature and the outlet temperature and judging whether the rotating speed of the outdoor fan needs to be reduced according to the superheat degree is carried out;
the step of obtaining the outdoor fan adjustment coefficient comprises the following steps:
Acquiring an adjustment coefficient of the outdoor fan during last speed-down operation;
and determining the outdoor fan adjusting coefficient according to the adjusting coefficient of the outdoor fan in the last speed-down operation and a second preset value.
10. The air conditioner control method according to any one of claims 1 to 7, characterized by further comprising, before the step of acquiring the current operating frequency of the compressor, the inlet temperature of the evaporator, and the outlet temperature of the evaporator of the air conditioner:
When the operation mode of the air conditioner is a refrigeration mode, the current power-on operation time length of the air conditioner is obtained;
and when the power-on operation time is longer than or equal to the preset time, executing the step of acquiring the current operation frequency of the compressor, the inlet temperature of the evaporator and the outlet temperature of the evaporator of the air conditioner.
11. An air conditioner control device, characterized by comprising: a memory, a processor, and an air conditioner control program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the air conditioner control method according to any one of claims 1 to 10.
12. An air conditioner, characterized in that the air conditioner comprises the air conditioner control device according to claim 11.
13. A readable storage medium, wherein an air conditioning control program is stored on the readable storage medium, which when executed by a processor, implements the steps of the air conditioning control method according to any one of claims 1 to 10.
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| CN114312212A (en) * | 2021-12-07 | 2022-04-12 | 青岛海尔空调器有限总公司 | Vehicle-mounted air conditioning unit and frequency control method of variable frequency compressor thereof |
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