CN111023429B - Control method and system and air conditioner - Google Patents

Control method and system and air conditioner Download PDF

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Publication number
CN111023429B
CN111023429B CN201911402156.1A CN201911402156A CN111023429B CN 111023429 B CN111023429 B CN 111023429B CN 201911402156 A CN201911402156 A CN 201911402156A CN 111023429 B CN111023429 B CN 111023429B
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temperature
actual
frequency
environment temperature
evaporation
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CN111023429A (en
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陈体宁
张秋玉
秦宪
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Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • 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
    • 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
    • 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 multi-split heating operation, and the method comprises the following steps: acquiring a critical environment temperature corresponding to a preset multi-online evaporation 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-connected air-conditioning 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 heating 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

Control method and system and air conditioner
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 is operated in a heating mode, the frequency of a compressor is controlled according to a target discharge pressure, and when a detected evaporation pressure is greater than a target suction pressure, the frequency of the compressor is controlled according to the target suction 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 heating operation, including: acquiring a critical environment temperature corresponding to a preset multi-online evaporation 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 heating 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 a multi-split system mode, and adjusting the frequency of the compressor according to the actual condensation temperature and a preset target condensation temperature.
Therefore, the control scheme that the outdoor environment temperature is used for determining the frequency of the compressor is adopted, the control scheme that the high-pressure sensor and the low-pressure sensor are used for determining the frequency of the compressor 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 evaporation temperature of the multi-split heating mode comprises: and arranging a temperature detection device in the outdoor heat exchanger tube of the multi-split air conditioner to detect the actual evaporation temperature.
Optionally, the detecting the actual condensing temperature of the multi-split heating mode includes: and arranging a temperature detection device in the indoor 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.
Optionally, when the number of the turned-on indoor units of the multi-split air conditioner is at least two, the actual condensation temperature is obtained by calculating an average value of temperatures in the indoor heat exchanger tubes of the turned-on indoor units.
Therefore, the actual condensation temperature is obtained according to the average value, so that the judgment is more accurate, and the control is more accurate.
In another aspect of the present invention, a control system for controlling the frequency of a compressor during heating operation of a multi-split air conditioning system is provided, the system comprising: the acquisition module is used for acquiring a critical environment temperature corresponding to a preset multi-online evaporation 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 heating 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 a preset target evaporation temperature; and the second adjusting module is used for acquiring the actual condensation temperature of the multi-split heating 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 condensation temperature and a preset target condensation 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 evaporation pressure (P) is generated during heating operatione) Decreases with increasing outdoor ambient temperature, finding the evaporation pressure PeThe 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 the frequency of the compressor during heating operation of the multiple refrigerant flow trains, 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 evaporation pressure.
In operation S101, the evaporation pressure of the multi-split air conditioner required by the actual demand is preset (e.g., 0.4MPa), the evaporation pressure decreases with the increase of the outdoor ambient temperature during the heating operation, the change of the actual evaporation pressure is observed, and when the actual evaporation pressure is equal to the preset evaporation pressure, the outdoor ambient temperature at this time is recorded as the critical ambient temperature, for example, when the evaporation pressure of the multi-split air conditioner is 0.4MPa, the corresponding critical ambient temperature is-4 ℃.
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 heating 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 outdoor ambient temperature is less than the critical ambient temperature as a result of the comparison in operation S102, the actual evaporation temperature T of the multi-connected heating mode needs to be obtained at this timeoeA temperature detecting device may be arranged in the outdoor heat exchanger tube to obtain the actual evaporating temperature Toe. Wherein the temperature detection means may, for example, beWith the temperature sensor, for example, the temperature sensor b is arranged in the outdoor heat exchanger tube, the arrangement position of the temperature sensor in the outdoor heat exchanger tube can 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 immediately. Actual evaporation temperature ToeStill equal to the temperature in the heat exchange tube of the outdoor unit. And S104, acquiring the actual condensation temperature of the multi-connected heating 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 condensation temperature and the preset target condensation temperature.
If the outdoor ambient temperature is greater than the critical ambient temperature as a result of the comparison in operation S102, the actual condensing temperature T of the multi-connected heating mode needs to be obtainedic. A temperature detection device can be arranged in the indoor heat exchanger tube of the multi-split air conditioner to detect the actual condensation temperature Tic. The temperature detection device may be, for example, a temperature sensor d 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 multiple 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 condensation 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 condensation temperature, namely:
Tic＝(Tic1+Tic2+…+Ticn)/n
wherein n is the number of internal units for starting up, Tic1、Tic2、…、TicnAnd the temperature value is the temperature value in each internal heat exchange tube. The condensing temperature obtained in this way is more accurate.
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 preset target evaporation temperature may be set according to actual requirements, for example, for different regions, the target evaporation temperature for heating the air conditioner 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-20 ℃ (0.4 MPa). The frequency of the compressor is increased when the actual evaporating temperature in the outdoor heat exchanger tubes of the multi-split air conditioner is higher than-20 ℃, and the frequency of the compressor is decreased when the actual evaporating temperature in the outdoor heat exchanger tubes of the multi-split air conditioner is lower than-20 ℃.
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, due to different latitudes and longitudes, the target condensation temperature for air conditioning refrigeration may be inconsistent, and may be set according to specific latitudes and longitudes, 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 at the time of actual use during the multi-split operation is 48 ℃ (2.8 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 48 c, and increased when the actual condensing temperature in the indoor heat exchanger tubes of the multi-split air conditioning system is lower than 48 c.
In the embodiment, the frequency of the compressor is controlled by taking the evaporation temperature acquired from the outdoor heat exchanger tube and the condensation temperature acquired from the indoor 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 evaporation 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, when the outdoor environment temperature is less than the critical environment temperature, obtain an actual evaporation temperature of the multi-split heating mode, and adjust the frequency of the compressor according to the actual evaporation temperature and a preset target evaporation temperature.
And a second adjusting module 450, configured to obtain an actual condensing temperature of the multi-split heating mode when the outdoor environment temperature is greater than the critical environment 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 an embodiment of the present 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 a computer program module 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 heating operation, comprising:
acquiring a critical environment temperature corresponding to a preset multi-online evaporation pressure, wherein the change of the actual evaporation pressure is observed, and when the actual evaporation pressure is equal to the preset evaporation pressure, recording the outdoor environment temperature at the moment as the critical environment temperature;
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 heating mode, and adjusting the frequency of the compressor according to the actual evaporation temperature and a preset target evaporation temperature;
under the condition that the outdoor environment temperature is higher than the critical environment temperature, acquiring the actual condensation temperature of the multi-split heating mode, and adjusting the frequency of the compressor according to the actual condensation temperature and a preset target condensation temperature;
the actual evaporation temperature of the multi-connected air-conditioning mode is obtained by arranging a temperature detection device in an outdoor heat exchanger tube of the multi-connected air-conditioning system;
the actual condensation temperature of the multi-split heating mode is obtained by arranging a temperature detection device in the indoor heat exchanger tubes of the multi-split air conditioner.
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 a temperature detection device is arranged at a return air inlet of the multi-connected outdoor heat exchanger to detect the outdoor environment temperature.
5. The control method according to any one of claims 1 to 3, wherein the acquiring the actual evaporation temperature of the multi-split heating mode comprises:
and arranging a temperature detection device in the outdoor 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 acquiring the actual condensing temperature of the multi-split heating mode comprises:
and arranging a temperature detection device in the indoor heat exchanger tube of the multi-split air conditioner to obtain the actual condensation temperature.
7. The control method according to claim 5, wherein the actual condensing temperature is obtained by calculating an average value of temperatures in the indoor heat exchanger tubes of the turned-on indoor units in the case where the number of turned-on indoor units of the multi-split air conditioner is at least two.
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 the frequency of a compressor during heating operation of a plurality of trains, comprising:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a critical environment temperature corresponding to a preset multi-split evaporation pressure, observing the change of an actual evaporation pressure, and recording the outdoor environment temperature as the critical environment temperature when the actual evaporation pressure is equal to the preset evaporation 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 heating 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 a preset target evaporation temperature;
and the second adjusting module is used for acquiring the actual condensation temperature of the multi-split heating 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 condensation temperature and a preset target condensation temperature.
10. An air conditioner comprising a processor and a computer readable storage medium storing a computer program which, when read and executed by the processor, implements the method of any one of claims 1-8.
CN201911402156.1A 2019-12-27 2019-12-27 Control method and system and air conditioner Active CN111023429B (en)

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CN112797603B (en) * 2020-12-28 2022-02-22 珠海格力电器股份有限公司 Air conditioner, starting control method and device thereof, storage medium and processor
CN113531827B (en) * 2021-06-30 2023-01-03 苏州英维克温控技术有限公司 Variable frequency air conditioner control method and device, electronic equipment and medium
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