CN111023424A - Control method and system and air conditioner - Google Patents
Control method and system and air conditioner Download PDFInfo
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- CN111023424A CN111023424A CN201911389717.9A CN201911389717A CN111023424A CN 111023424 A CN111023424 A CN 111023424A CN 201911389717 A CN201911389717 A CN 201911389717A CN 111023424 A CN111023424 A CN 111023424A
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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
- F24F11/70—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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The invention provides a control method system and an air conditioner, which are used for controlling the frequency of a compressor during the refrigeration operation of a multi-split air conditioner, and the method comprises the following steps: acquiring a critical environment temperature corresponding to a preset multi-split condensing pressure; detecting the outdoor environment temperature; judging whether the outdoor environment temperature is greater than the critical environment temperature; under the condition that the outdoor environment temperature is lower than the critical environment temperature, acquiring the actual evaporation temperature of the multi-split air conditioner in the refrigeration mode, and adjusting the frequency of the compressor according to the actual evaporation temperature and the preset target evaporation temperature; and under the condition that the outdoor environment temperature is higher than the critical environment temperature, acquiring the actual condensation temperature of the multi-split air conditioner in the refrigeration mode, and adjusting the frequency of the compressor according to the actual condensation temperature and the preset target condensation temperature. The method greatly saves cost, increases market competitiveness of products, enables system operation parameters to be closer to design values compared with the prior control, and improves system operation efficiency.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and system and an air conditioner.
Background
At present, in the related art, when a multi-split air conditioner operates, the frequency of a compressor is controlled according to a target suction pressure, and when a detected discharge pressure is greater than a target discharge pressure, the frequency of the compressor is controlled according to the target discharge pressure in order to ensure the reliability of the compressor. The control method needs to install a high-pressure sensor on an exhaust pipe of the multi-split air-conditioning system to detect the exhaust pressure (P)d) The low pressure sensor is installed on the air suction pipe of the compressor to detect the air suction pressure (P)s)。
The compressor row and the suction pipe are required to be provided with high and low pressure sensors, so that the cost of the multi-online system is higher. In order to reduce the cost and increase the product competitiveness, the multi-split air conditioner will gradually remove the components such as a high pressure sensor, a low pressure sensor and the like, so that a compressor frequency control scheme is required to replace the existing scheme.
Disclosure of Invention
The present application provides a control method, a control system and an air conditioner, which are used to at least partially solve the above technical problems.
To solve the above problems, an aspect of the present invention provides a control method for controlling a frequency of a compressor in a multi-split cold operation, including: acquiring a critical environment temperature corresponding to a preset multi-split condensing pressure; detecting the outdoor environment temperature; judging whether the outdoor environment temperature is greater than the critical environment temperature; under the condition that the outdoor environment temperature is lower than the critical environment temperature, acquiring the actual evaporation temperature of a multi-split air conditioner refrigeration mode, and adjusting the frequency of the compressor according to the actual evaporation temperature and a preset target evaporation temperature; and under the condition that the outdoor environment temperature is higher than the critical environment temperature, acquiring the actual condensation temperature of the multi-split air-conditioning system in the refrigeration mode, and adjusting the frequency of the compressor according to the actual condensation temperature and the preset target condensation temperature.
Therefore, the outdoor environment temperature is adopted to determine the frequency control scheme of the compressor, the control scheme that the frequency of the compressor is determined by using the high-pressure sensor and the low-pressure sensor in the traditional scheme is replaced, the high-pressure sensor and the low-pressure sensor can be removed by the multi-split system, the cost is greatly saved, and the market competitiveness of products is increased.
Optionally, the adjusting the frequency of the compressor according to the actual evaporation temperature and a preset target evaporation temperature includes: judging whether the actual evaporation temperature is greater than a preset target evaporation temperature or not; if the actual evaporation temperature is higher than the target evaporation temperature, increasing the frequency of the compressor; and if the actual evaporation temperature is lower than the target evaporation temperature, reducing the frequency of the compressor.
Optionally, the adjusting the frequency of the compressor according to the actual condensing temperature and a preset target condensing temperature includes: judging whether the actual condensation temperature is greater than a preset target condensation temperature or not; if the actual condensing temperature is higher than the target condensing temperature, reducing the frequency of the compressor; and if the actual condensation temperature is lower than the target condensation temperature, increasing the frequency of the compressor.
Optionally, the frequency of the compressor is not adjusted in case the outdoor ambient temperature is equal to the critical ambient temperature.
Optionally, the detecting the outdoor ambient temperature includes: and arranging a temperature detection device at a return air inlet of the multi-online outdoor heat exchanger to detect the outdoor environment temperature.
Optionally, the detecting the actual evaporating temperature of the multi-split air conditioning system comprises: and arranging a temperature detection device in the indoor heat exchanger tube of the multi-split air conditioner to detect the actual evaporation temperature.
Optionally, the detecting the actual evaporating temperature of the multi-split air conditioning system comprises: and arranging a temperature detection device in the outdoor heat exchanger tube of the multi-split air conditioner to detect the actual condensation temperature.
Therefore, the target value of the temperature in the indoor heat exchanger tube and the outdoor heat exchanger tube is adopted to control the frequency of the compressor, the target value of the exhaust pressure and the suction pressure in the traditional scheme is replaced to control the frequency of the compressor, and compared with the traditional control, the system operation parameter is closer to the design value, and the system operation efficiency is improved.
Another aspect of the present invention provides a control system for controlling a frequency of a compressor in a multi-split cold operation, the system including: the acquisition module is used for acquiring a critical environment temperature corresponding to a preset multi-split condensing pressure; the detection module is used for detecting the outdoor environment temperature; the judging module is used for judging whether the outdoor environment temperature is greater than the critical environment temperature; the first adjusting module is used for acquiring the actual evaporation temperature of the multi-split air conditioner in the refrigeration mode under the condition that the outdoor environment temperature is lower than the critical environment temperature, and adjusting the frequency of the compressor according to the actual evaporation temperature and the preset target evaporation temperature; and the second adjusting module is used for acquiring the actual condensing temperature of the multi-split air conditioner in the refrigeration mode under the condition that the outdoor environment temperature is greater than the critical environment temperature, and adjusting the frequency of the compressor according to the actual condensing temperature and the preset target condensing temperature.
The control system has the same advantages as the control method, and the description is omitted.
Yet another aspect of the present invention provides an air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read by the processor and when executed, implementing the method as described above.
The advantages of the air conditioner are the same as those of the control method, and the description is omitted.
Drawings
FIG. 1 is a flow chart that schematically illustrates a control method provided by an embodiment of the present invention;
FIG. 2 is a flow chart schematically illustrating a method for adjusting the frequency of the compressor according to the actual evaporating temperature and the preset target evaporating temperature, provided by the embodiment of the present invention;
FIG. 3 is a flow chart schematically illustrating a method for adjusting a frequency of a compressor according to an actual condensing temperature and a preset target condensing temperature, according to an embodiment of the present invention;
FIG. 4 schematically illustrates a block diagram of a control system provided by an embodiment of the present invention;
fig. 5 schematically shows a block diagram of an air conditioner provided by an embodiment of the present invention.
Detailed Description
In order to make the purpose, features and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
For the multi-split air conditioning system, the outdoor environment temperature affects the operation parameters of the multi-split air conditioning system, and the condensing pressure (P) during the refrigeration operationc) The condensing pressure P is found out along with the increase of the outdoor environment temperaturecThe corresponding critical environment temperature can be directly used to determine the compressor frequency f control method by using the outdoor environment temperature and the critical environment.
Referring to fig. 1, fig. 1 schematically illustrates a flowchart of a control method according to an embodiment of the present invention, which may be used to control a frequency of a compressor during a multi-split cold operation, and the method may include operations S101 to S104, which are as follows:
s101, obtaining a critical environment temperature corresponding to a preset multi-split condensing pressure.
In operation S101, a magnitude of a condensing pressure (e.g., 3.7MPa) of the multi-split air conditioner required by an actual demand is preset, since the condensing pressure increases with an increase in outdoor ambient temperature during a cooling operation, a change in the actual condensing pressure is observed, and when the actual condensing pressure is equal to the preset condensing pressure, the outdoor ambient temperature at that time is recorded as a critical ambient temperature. For example, when the condensing pressure of the multi-split air-conditioning system is 3.7Mpa, the corresponding critical ambient temperature is 45 ℃.
S102, detecting the outdoor environment temperature, and judging whether the outdoor environment temperature is greater than the critical environment temperature.
In operation S102, a temperature detection device may be disposed at a return air inlet of the multi-online outdoor heat exchanger to dynamically detect an outdoor ambient temperature T. The temperature checking device can be a temperature sensor, for example, and the arrangement position of the temperature sensor in the return air inlet of the multi-split outdoor heat exchanger can be obtained through multiple experiments.
S103, under the condition that the outdoor environment temperature is lower than the critical environment temperature, the actual evaporation temperature of the multi-split air conditioner refrigeration mode is obtained, and the frequency of the compressor is adjusted according to the actual evaporation temperature and the preset target evaporation temperature.
If the comparison result of operation S102 is that the outdoor ambient temperature is less than the critical ambient temperature, for example, the outdoor ambient temperature is 39 ℃ and less than the critical ambient temperature 45 ℃, then the actual evaporation temperature T of the multi-split air-conditioning system is required to be obtainedieA temperature detecting device may be disposed in the indoor heat exchanger tube to obtain the actual evaporating temperature Tie. The temperature checking device may employ a temperature sensor, for example, a temperature sensor a is disposed in an indoor heat exchanger tube, and the disposition position of the temperature sensor in the indoor heat exchanger tube may be obtained through a plurality of experiments.
The multi-connected machine is provided with a plurality of internal machines, and in the actual working process, not every internal machine is in an opening state, so that the obtained evaporation temperature needs to be the temperature value in the heat exchange tube of the opened internal machine. Under the condition that the number of the internal machines which are started in the multi-online mode is at least two, the mathematical average value of the temperature in the indoor heat exchanger tube of each started internal machine is calculated to be used as the actual evaporation temperature, namely:
Tie＝(Tie1+Tie2+...+Tien)/n
wherein n is the number of internal units for starting up, Tie1、Tie2、...、TienAnd the temperature value is the temperature value in each internal heat exchange tube. The evaporating temperature obtained in this way is more accurate.
And S104, acquiring the actual condensing temperature of the multi-split air conditioner in the refrigeration mode under the condition that the outdoor environment temperature is higher than the critical environment temperature, and adjusting the frequency of the compressor according to the actual condensing temperature and the preset target condensing temperature.
If the outdoor ambient temperature is less than the critical ambient temperature as a result of the comparison in operation S102, the actual condensing temperature of the multi-split air-conditioning system needs to be obtainedToc. The temperature detection device can be arranged in the outdoor heat exchanger tube of the multi-split air conditioner to detect the actual condensation temperature Toc. The temperature checking device may employ a temperature sensor, for example, a temperature sensor c is disposed in an outdoor heat exchanger tube, and the disposition position of the temperature sensor in the outdoor heat exchanger tube may be obtained through a plurality of experiments.
Because the multi-connected outdoor unit generally only has one outdoor unit, a plurality of indoor units are started in time. Actual condensation temperature TocStill equal to the temperature in the heat exchange tube of the outdoor unit.
Furthermore, in the case where the outdoor ambient temperature is equal to the critical ambient temperature, there is no need to adjust the frequency of the compressor.
To this end, the adjustment of the compressor frequency may be accomplished based on the ambient temperature.
The control scheme that outdoor environment temperature determines the frequency of the compressor is adopted in the embodiment, the control scheme that the frequency of the compressor is determined by using the high-pressure sensor and the low-pressure sensor in the traditional scheme is replaced, the high-pressure sensor and the low-pressure sensor can be removed by the multi-split system, the cost is greatly saved, and the market competitiveness of products is increased. The target value of the temperature in the indoor heat exchanger tube and the outdoor heat exchanger tube is adopted to control the frequency of the compressor, and the target value of the exhaust pressure and the suction pressure in the traditional scheme is replaced to control the frequency of the compressor.
Referring to fig. 2, fig. 2 schematically shows a flowchart of a method for adjusting a frequency of a compressor according to an actual evaporating temperature and a preset target evaporating temperature, where the adjusting method may include operations S201 to S203, as shown in fig. 2.
S201, judging whether the actual evaporation temperature is larger than a preset target evaporation temperature.
The evaporation temperature is the most important parameter in the operation of the refrigeration device. If the evaporation temperature is too high, the low temperature requirement of the cooled object cannot be met. An excessively low evaporation temperature would reduce the operating economy of the refrigeration unit and bring about other undesirable consequences. The preset target evaporation temperature may be set according to actual requirements, for example, for different regions, the target evaporation temperature of air-conditioning refrigeration may be inconsistent due to the difference of the longitude and latitude, and the preset target evaporation temperature may be set according to the specific longitude and latitude, which is not limited in the present invention.
If so, operation S202 is performed, and if not, operation S203 is performed.
And S202, improving the frequency of the multi-split compressor.
The operation can be realized by sending an instruction to the execution module through the multi-connected controller so as to adjust the frequency of the compressor.
And S203, reducing the frequency of the multi-split compressor.
The operation can be realized by sending an instruction to the execution module through the multi-connected controller so as to adjust the frequency of the compressor.
For example, the target evaporation temperature at the time of actual use during the multi-split operation is-5 ℃. The compressor frequency is increased when the actual evaporating temperature in the indoor heat exchanger tubes of the multi-split air conditioner is higher than-5 ℃, and the compressor frequency is decreased when the actual evaporating temperature in the indoor heat exchanger tubes of the multi-split air conditioner is lower than-5 ℃.
Referring to fig. 3, fig. 3 schematically illustrates a flowchart of a method for adjusting a frequency of a compressor according to an actual condensing temperature and a preset target condensing temperature according to an embodiment of the present invention, and as shown in fig. 3, the adjusting method may include operations S301 to S303, for example.
S301, judging whether the actual condensing temperature is larger than a preset target condensing temperature.
The condensation temperature is: the temperature at which the state of the substance changes from gaseous to liquid under a certain pressure. The preset target condensation temperature may be set according to actual requirements, for example, for different regions, the target condensation temperature of air-conditioning refrigeration may be inconsistent due to the difference of the longitude and latitude, and the preset target condensation temperature may be set according to the specific longitude and latitude, which is not limited in the present invention.
If so, operation S302 is performed, and if not, operation S303 is performed.
And S302, reducing the frequency of the multi-split compressor.
The operation can be realized by sending an instruction to the execution module through the multi-connected controller so as to adjust the frequency of the compressor.
And S303, improving the frequency of the multi-split compressor.
The operation can be realized by sending an instruction to the execution module through the multi-connected controller so as to adjust the frequency of the compressor.
For example, the target condensation temperature in actual use during the multi-split operation is 58 ℃ (3.65 MPa). The compressor frequency is decreased when the actual condensing temperature in the indoor heat exchanger tubes of the multi-split air conditioning system is higher than 58 c, and increased when the actual condensing temperature in the indoor heat exchanger tubes of the multi-split air conditioning system is lower than 58 c.
In the embodiment, the frequency of the compressor is controlled by taking the evaporation temperature acquired from the indoor heat exchanger tube and the condensation temperature acquired from the outdoor heat exchanger tube as target values, so that the system operation parameters are closer to the design values, and the system operation efficiency is improved.
Referring to fig. 4, fig. 4 schematically illustrates a block diagram of a control system according to an embodiment of the present invention, and as shown in fig. 4, the control system 400 may include, for example, an obtaining module 410, a detecting module 420, a determining module 430, a first adjusting module 440, and a second adjusting module 450.
The obtaining module 410 is configured to obtain a critical environment temperature corresponding to a preset multi-split condensing pressure.
And the detection module 420 is used for detecting the outdoor environment temperature.
The determining module 430 is configured to determine whether the outdoor ambient temperature is greater than the critical ambient temperature.
The first adjusting module 440 is configured to obtain an actual evaporation temperature of the multi-split air conditioner in the refrigeration mode when the outdoor ambient temperature is less than the critical ambient temperature, and adjust the frequency of the compressor according to the actual evaporation temperature and a preset target evaporation temperature.
The second adjusting module 450 is configured to obtain an actual condensing temperature of the multi-split air conditioner in the refrigeration mode when the outdoor ambient temperature is greater than the critical ambient temperature, and adjust the frequency of the compressor according to the actual condensing temperature and a preset target condensing temperature.
For some embodiments of the system, please refer to the above method embodiments for details, which have the same advantages as the above control method, and are not repeated herein.
Referring to fig. 5, fig. 5 schematically illustrates a block diagram of an air conditioner according to an embodiment of the present invention. The air conditioner 500 may include, for example, a processor 510 and a computer readable storage medium 520 storing a computer program 521.
In particular, processor 510 may include, for example, a general purpose microprocessor, an instruction set processor and/or related chip set and/or a special purpose microprocessor (e.g., an Application Specific Integrated Circuit (ASIC)), and/or the like. The processor 510 may also include on-board memory for caching purposes. Processor 510 may be a single processing unit or a plurality of processing units for performing different actions of a method flow according to embodiments of the disclosure.
Computer-readable storage media 520, for example, may be non-volatile computer-readable storage media, specific examples including, but not limited to: magnetic storage systems, such as magnetic tape or Hard Disk Drives (HDDs); optical storage systems, such as compact discs (CD-ROMs); memory such as Random Access Memory (RAM) or flash memory, etc.
The computer-readable storage medium 520 may include a computer program 521, which computer program 521 may include code/computer-executable instructions that, when executed by the processor 510, cause the processor 510 to perform a method according to an embodiment of the disclosure, or any variation thereof.
The computer program 521 may be configured with, for example, computer program code comprising computer program modules. For example, in an example embodiment, code in computer program 521 may include one or more program modules, including for example, modules 521A, 521B, … …. It should be noted that the division and number of modules are not fixed, and those skilled in the art may use suitable program modules or program module combinations according to actual situations, and when these program modules are executed by the processor 510, the processor 510 may execute the method according to the embodiment of the present disclosure or any variation thereof.
At least one of the obtaining module 410, the detecting module 420, the determining module 430, the first adjusting module 440, and the second adjusting module 450 according to embodiments of the present disclosure may be implemented as computer program modules described with reference to fig. 5, which, when executed by the processor 510, may implement the respective operations described above.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A control method for controlling a frequency of a compressor in a multi-split refrigerant operation, comprising:
acquiring a critical environment temperature corresponding to a preset multi-split condensing pressure;
detecting the outdoor environment temperature;
judging whether the outdoor environment temperature is greater than the critical environment temperature;
under the condition that the outdoor environment temperature is lower than the critical environment temperature, acquiring the actual evaporation temperature of a multi-split air conditioner refrigeration mode, and adjusting the frequency of the compressor according to the actual evaporation temperature and a preset target evaporation temperature;
and under the condition that the outdoor environment temperature is higher than the critical environment temperature, acquiring the actual condensation temperature of the multi-split air-conditioning system in the refrigeration mode, and adjusting the frequency of the compressor according to the actual condensation temperature and the preset target condensation temperature.
2. The control method according to claim 1, wherein the adjusting the frequency of the compressor according to the actual evaporating temperature and a preset target evaporating temperature comprises:
judging whether the actual evaporation temperature is greater than a preset target evaporation temperature or not;
if the actual evaporation temperature is higher than the target evaporation temperature, increasing the frequency of the compressor;
and if the actual evaporation temperature is lower than the target evaporation temperature, reducing the frequency of the compressor.
3. The control method of claim 1, wherein the adjusting the frequency of the compressor according to the actual condensing temperature and a preset target condensing temperature comprises:
judging whether the actual condensation temperature is greater than a preset target condensation temperature or not;
if the actual condensing temperature is higher than the target condensing temperature, reducing the frequency of the compressor;
and if the actual condensation temperature is lower than the target condensation temperature, increasing the frequency of the compressor.
4. The control method according to any one of claims 1 to 3, wherein the detecting the outdoor ambient temperature includes:
and arranging a temperature detection device at a return air inlet of the multi-online outdoor heat exchanger to detect the outdoor environment temperature.
5. The control method according to any one of claims 1 to 3, wherein the obtaining the actual evaporating temperature of the multi-split air-conditioning system comprises:
and arranging a temperature detection device in the indoor heat exchanger tube of the multi-split air conditioner to obtain the actual evaporation temperature.
6. The control method according to any one of claims 1 to 3, wherein the obtaining the actual evaporating temperature of the multi-split air-conditioning system comprises:
and arranging a temperature detection device in the outdoor heat exchanger tube of the multi-split air conditioner to obtain the actual condensation temperature.
7. The control method according to claim 5, wherein in the case that the number of the plurality of indoor units that are turned on is at least two, the actual evaporation greenhouse is obtained by calculating an average value of the temperatures in the indoor heat exchanger tubes of the respective turned-on indoor units.
8. The control method according to claim 1, characterized by further comprising:
without adjusting the frequency of the compressor in the event that the outdoor ambient temperature is equal to the critical ambient temperature.
9. A control system for controlling a frequency of a compressor in a multi-split refrigerant operation, comprising:
the acquisition module is used for acquiring a critical environment temperature corresponding to a preset multi-split condensing pressure;
the detection module is used for detecting the outdoor environment temperature;
the judging module is used for judging whether the outdoor environment temperature is greater than the critical environment temperature;
the first adjusting module is used for acquiring the actual evaporation temperature of the multi-split air conditioner in the refrigeration mode under the condition that the outdoor environment temperature is lower than the critical environment temperature, and adjusting the frequency of the compressor according to the actual evaporation temperature and the preset target evaporation temperature;
and the second adjusting module is used for acquiring the actual condensing temperature of the multi-split air conditioner in the refrigeration mode under the condition that the outdoor environment temperature is greater than the critical environment temperature, and adjusting the frequency of the compressor according to the actual condensing temperature and the preset target condensing temperature.
10. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method according to any one of claims 1 to 8.
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