CN115111749B - Air conditioner control method and device, multi-split air conditioner and storage medium - Google Patents

Air conditioner control method and device, multi-split air conditioner and storage medium Download PDF

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Publication number
CN115111749B
CN115111749B CN202210943322.4A CN202210943322A CN115111749B CN 115111749 B CN115111749 B CN 115111749B CN 202210943322 A CN202210943322 A CN 202210943322A CN 115111749 B CN115111749 B CN 115111749B
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current
external machine
started
machine modules
air conditioner
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CN115111749A (en
Inventor
陈东
黄春
鲍洋
李龙威
吉金浩
肖旭东
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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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • 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
    • F24F2140/00—Control inputs relating to system states
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The embodiment of the invention provides an air conditioner control method, an air conditioner control device, a multi-split air conditioner and a storage medium, and relates to the technical field of air conditioners. The method comprises the following steps: if the sum of the maximum protection currents of all the external machine modules is larger than the limit current of the multi-split air conditioner, determining the maximum number of the external machine modules to be started according to the maximum protection current and the limit current of each external machine module. And then, starting each external machine module to be started according to the maximum number of the external machine modules to be started, and reducing the frequency limiting current and the frequency reducing current according to the maximum number of the external machine modules to be started and the current limiting current when the number of the external machine modules to be started is equal to the maximum number. And further, the protection shutdown of the multi-split air conditioner of the external air conditioner caused by the fact that the running current of the external air conditioner is overlarge and exceeds the limit current is avoided.

Description

Air conditioner control method and device, multi-split air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method, an air conditioner control device, a multi-split air conditioner and a storage medium.
Background
The multi-split air conditioner comprises a plurality of outer machine modules which are connected in parallel and is used for large commercial office buildings. Because of the government electricity limiting requirements, the operating current of the multi-split air conditioner is often limited so as not to violate the government electricity limiting requirements.
In the prior art, the operation current is generally limited by limiting the maximum operation frequency of the unit, but this mode affects the actual use effect of the user.
Disclosure of Invention
The invention aims at providing an air conditioner control method, an air conditioner control device, a multi-split air conditioner and a storage medium, which can determine the maximum number of external machine modules started according to the electricity limiting current and the maximum protection current of each external machine module, and avoid the excessive number of the external machine modules started to cause the excessive running current. And when the external machine modules with the maximum number are started, the frequency limiting current and the frequency reducing current are reduced so as to avoid the situation that the running current of the multi-split air conditioner exceeds the frequency limiting current and the multi-split air conditioner is protected and stopped.
In order to achieve the above object, the technical scheme adopted by the embodiment of the invention is as follows:
in a first aspect, an embodiment of the present invention provides an air conditioner control method, which is applied to a multi-split air conditioner; the method comprises the following steps:
acquiring the electricity limiting current of the multi-split air conditioner and the maximum protection current of each external unit module;
if the sum of the maximum protection currents of all the external machine modules is larger than the limit current, determining the maximum number of the external machine modules to be started according to the maximum protection current of each external machine module and the limit current;
opening each external machine module to be opened according to the maximum number of the external machine modules to be opened;
when the number of the external machine modules to be started is equal to the maximum number, reducing preset frequency limiting current and frequency reducing current according to the maximum number of the external machine modules to be started and the current limiting current to obtain corrected frequency limiting current and corrected frequency reducing current, and controlling each external machine module to be started to operate according to the corrected frequency limiting current and the corrected frequency reducing current.
Compared with the prior art, the air conditioner control method provided by the embodiment of the invention determines the maximum number of the external machine modules to be started according to the maximum protection current and the limit current of each external machine module when the sum of the maximum protection currents of all the external machine modules is larger than the limit current of the multi-split air conditioner. And then, starting each external machine module to be started according to the maximum number of the external machine modules to be started, and reducing the frequency limiting current and the frequency reducing current according to the maximum number of the external machine modules to be started and the current limiting current when the number of the external machine modules to be started is equal to the maximum number. And further, the protection shutdown of the multi-split air conditioner of the external air conditioner caused by the fact that the running current of the external air conditioner is overlarge and exceeds the limit current is avoided.
In one possible implementation manner, the number of the external machine modules is N; the step of determining the maximum number of the external machine modules to be started according to the maximum protection current and the limit current of each external machine module comprises the following steps:
sequencing the maximum protection current of each external machine module according to the sequence from big to small;
calculating N total currents based on each sequenced maximum protection current; wherein the nth total current is the sum of the first N maximum protection currents, N is more than or equal to 1 and less than or equal to N, and N is an integer;
if the electricity limiting current is larger than or equal to the ith-1 total current and smaller than the ith total current, determining that the maximum number of the external machine modules to be started is i; wherein i is more than or equal to 2 and less than or equal to N, and i is an integer.
In one possible implementation manner, the step of determining the maximum number of external machine modules to be started according to the maximum protection current and the limit current of each external machine module further includes:
and if the limited current is smaller than the 1 st total current, determining that the maximum number of the external machine modules to be started is 1.
In one possible implementation manner, the step of reducing the preset frequency-limiting current and the preset frequency-limiting current according to the maximum number of the external machine modules to be started and the limited current to obtain the corrected frequency-limiting current and the corrected frequency-limiting current includes:
if the maximum number of the external machine modules to be started is n, taking the nth total current as the correction current;
based on the correction current, the limiting current, and the limiting frequency current, formula I is used x ′＝A×I limt /I re ×I x Calculating to obtain the corrected frequency-limiting current;
based on the correction current, the limiting current, and the down-conversion current, formula I is used j ′＝A×I limt /I re ×I j Calculating to obtain the corrected down-conversion current;
wherein I is x 、I j The frequency limiting current and the frequency reducing current are respectively; i x ' and I j ' the corrected frequency limited current and the corrected down-converted current, respectively; a is a coefficient; i limt For the limited current, I re For the correction current.
In one possible implementation manner, the multi-split air conditioner further comprises a plurality of internal machines; the step of starting each external machine module to be started according to the maximum number of the external machine modules to be started comprises the following steps:
determining the number of the started internal machines;
if the number of the started internal machines is less than half of the total number of the internal machines, starting the external machine modules to be started, wherein the number of the external machine modules to be started is less than the maximum number of the external machine modules to be started;
and if the number of the started internal machines is greater than or equal to half of the total number of the internal machines, starting the external machine modules to be started, wherein the number of the external machine modules to be started is equal to the maximum number of the external machine modules to be started.
In one possible implementation manner, after the step of obtaining the electricity limiting current of the multi-split air conditioner and the maximum protection current of each external unit module, the method further includes:
and if the sum of the maximum protection currents of all the external machine modules is smaller than or equal to the electricity limiting current, starting each external machine module, and controlling each external machine module to operate according to the frequency reducing current and the frequency limiting current.
In one possible implementation manner, after the step of starting each external machine module to be started according to the maximum number of external machine modules to be started, the method further includes:
when the number of the external machine modules to be started is smaller than the maximum number, controlling each external machine module to be started to operate according to the frequency limiting current and the frequency reducing current.
In a second aspect, the embodiment of the invention also provides an air conditioner control device, which is applied to the multi-split air conditioner; the air conditioner control device includes:
the acquisition module is used for acquiring the electricity limiting current of the multi-split air conditioner and the maximum protection current of each external unit module;
the determining module is used for determining the maximum number of the external machine modules to be started according to the maximum protection current and the limit current of each external machine module if the sum of the maximum protection currents of all the external machine modules is larger than the limit current;
the starting module is used for starting each external machine module to be started according to the maximum number of the external machine modules to be started;
and the control module is used for reducing preset frequency limiting current and frequency reducing current according to the maximum number of the external machine modules to be started and the limit current when the number of the external machine modules to be started is equal to the maximum number, obtaining corrected frequency limiting current and corrected frequency reducing current, and controlling each external machine module to be started to operate according to the corrected frequency limiting current and the corrected frequency reducing current.
In a third aspect, an embodiment of the present invention further provides a multi-split air conditioner, where the multi-split air conditioner includes:
one or more processors;
and a memory for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the above-described air conditioning control method.
In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium having stored thereon a computer program that when executed by a processor implements the above-described air conditioner control method.
Compared with the prior art, the air conditioner control method and device, the multi-split air conditioner and the storage medium provided by the embodiment of the invention comprise the following steps: if the sum of the maximum protection currents of all the external machine modules is larger than the limit current of the multi-split air conditioner, determining the maximum number of the external machine modules to be started according to the maximum protection current and the limit current of each external machine module. And then, starting each external machine module to be started according to the maximum number of the external machine modules to be started, and reducing the frequency limiting current and the frequency reducing current according to the maximum number of the external machine modules to be started and the current limiting current when the number of the external machine modules to be started is equal to the maximum number. And further, the protection shutdown of the multi-split air conditioner caused by overlarge running current of the outer-split air conditioner exceeding the limit current is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of an air conditioner control method according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of another air conditioner control method according to an embodiment of the present invention.
Fig. 3 is a schematic flow chart of an air conditioner control method according to an embodiment of the present invention.
Fig. 4 is a block schematic diagram of an air conditioner control device according to an embodiment of the present invention.
Fig. 5 is a block schematic diagram of a multi-split air conditioner according to an embodiment of the present invention.
Icon: 100-multi-split air conditioner; 101-memory; 102-a processor; 103-an external machine module; 104-an internal machine; 200-an air conditioner control device; 201-an acquisition module; 202-a determination module; 203-opening a module; 204-control module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The multi-split air conditioner comprises a plurality of parallel module external machines and is mainly used for large commercial office buildings. Because of the government electricity limiting requirements, the operating current of the multi-split air conditioning unit is often limited so as not to violate the government electricity limiting requirements.
In the prior art, the maximum operating frequency of the unit is limited by dialing codes or parameter setting to limit the operating current, but the mode can influence the actual use effect of a user.
In view of the above problems, the present embodiment provides an air conditioner control method, which determines the maximum number of external machine modules that are turned on according to the current limit and the maximum protection current of each external machine module, so as to avoid excessive number of external machine modules that are turned on, resulting in excessive running current. And when the external machine modules with the maximum number are started, the frequency limiting current and the frequency reducing current are reduced so as to avoid the situation that the running current of the multi-split air conditioner exceeds the frequency limiting current and the multi-split air conditioner is protected and stopped.
On the basis of the above, the air conditioner control method provided by the present embodiment will be described. Referring to fig. 1, fig. 1 shows a flow chart of an air conditioner control method according to the present embodiment, and the method includes the following steps S110 to S140.
S110, acquiring the electricity limiting current of the multi-split air conditioner and the maximum protection current of each external unit module.
In this embodiment, the electricity limiting current refers to a maximum running current specified by the government, and when the running current of the multi-split air conditioner is greater than the electricity limiting current, the multi-split air conditioner is powered off and stopped.
The maximum protection current is the maximum value of the set running current of the external machine module, and when the running current of the external machine module exceeds the maximum protection current corresponding to the external machine module, the multi-split air conditioner controls the compressor of the external machine module to stop running, so that the coincidence of the multi-split air conditioner is reduced, and the running power is reduced.
And S120, if the sum of the maximum protection currents of all the external machine modules is larger than the limit current, determining the maximum number of the external machine modules to be started according to the maximum protection current and the limit current of each external machine module.
In this embodiment, if the sum of the maximum protection currents of all the external machine modules is greater than the limit current, it is indicated that when all the external machine modules are turned on, the running current of the multi-split air conditioner may exceed the limit current, resulting in power-off and shutdown of the multi-split air conditioner. Therefore, it is necessary to limit the number of external machine modules to be turned on, or to adjust the frequency limiting current and the frequency reducing current of the external machine modules.
S130, according to the maximum number of the external machine modules to be started, starting each external machine module to be started.
And S140, when the number of the external machine modules to be started is equal to the maximum number, reducing preset frequency limiting current and frequency reducing current according to the maximum number of the external machine modules to be started and the limit current to obtain corrected frequency limiting current and corrected frequency reducing current, and controlling each external machine module to be started to operate according to the corrected frequency limiting current and the corrected frequency reducing current.
In this embodiment, the frequency limiting current, the frequency reducing current and the maximum protection current are current protection values set according to a certain gradient, and the magnitude relation is as follows: frequency limiting current < down current < maximum protection current. When the running current of the external machine module reaches the frequency limiting current, the running frequency of the compressor of the external machine module is limited not to increase; when the running current of the external machine module reaches the frequency-reducing current, the running frequency of the compressor of the external machine module is reduced; and when the running current of the external machine module reaches the maximum protection current, controlling the compressor of the external machine module to stop running.
The number of external machine modules to be started may be less than or equal to the maximum number of external machine modules to be started. When the number of the external machine modules to be started is equal to the maximum number, if the multi-split air conditioner operates according to the preset frequency limiting current and the preset frequency reducing current, the risk that the operation current of the external air conditioner exceeds the frequency limiting current may occur. Therefore, it is necessary to reduce the frequency limiting current and the frequency reducing current of the external machine module to be turned on.
Compared with the prior art, the air conditioner control method provided by the embodiment of the invention determines the maximum number of the opened external machine modules according to the electricity limiting current and the maximum protection current of each external machine module, and avoids the overlarge running current caused by the overlarge number of the opened external machine modules. And when the external machine modules with the maximum number are started, the frequency limiting current and the frequency reducing current are reduced so as to avoid the situation that the running current of the multi-split air conditioner exceeds the frequency limiting current and the multi-split air conditioner is protected and stopped.
Alternatively, if the sum of the maximum protection currents of all the external machine modules is less than or equal to the limiting current, the characterization may turn on all the external machine modules, and the operation of each external machine module is not limited.
Therefore, referring to fig. 2 on the basis of fig. 1, after step S110, the air conditioner control method may further protect step S111 described below.
And S111, if the sum of the maximum protection currents of all the external machine modules is smaller than or equal to the electricity limiting current, starting each external machine module, and controlling each external machine module to operate according to the frequency reducing current and the frequency limiting current.
Optionally, after each external machine module to be started is started according to the maximum number of external machine modules to be started, if the number of external machine modules to be started is smaller than the maximum number, the operation of the external machine modules to be started is characterized to be not influenced by the current, and the external machine modules to be started can be operated according to preset frequency limiting current and frequency reducing current.
Therefore, on the basis of fig. 2, please refer to fig. 3 after step S130, the air conditioner control method may further include the following step S150.
And S150, when the number of the external machine modules to be started is smaller than the maximum number, controlling each external machine module to be started to operate according to the frequency limiting current and the frequency reducing current.
In this embodiment, the number of external units to be started is limited, so that the excessive starting number of external units is avoided, and the running current of the multi-split air conditioner exceeds the limit current.
Alternatively, since the maximum protection current of each external unit module may be different, generally, when the sum of the maximum protection currents of all external unit modules is greater than the limit current, the maximum number of external unit modules to be turned on needs to be determined according to the relationship between the maximum protection current and the limit current of each external unit module.
Step S120 may include sub-steps S1201-S1203 described below.
And S1201, sequencing the maximum protection current of each external machine module in order from large to small.
S1202, calculating N total currents based on each sequenced maximum protection current; wherein the nth total current is the sum of the first N maximum protection currents, N is more than or equal to 1 and less than or equal to N, and N is an integer.
S1203, if the limited current is greater than or equal to the i-1 th total current and is smaller than the i-1 th total current, determining the maximum number of external machine modules to be started as i; wherein i is more than or equal to 2 and less than or equal to N, and i is an integer.
Optionally, step S120 may further include a sub-step S1204 described below.
And S1204, if the limited current is smaller than the 1 st total current, determining that the maximum number of the external machine modules to be started is 1.
In the present embodiment, the number of the external machine modules is assumed to be N, and 2+.n+.4, and the above steps S1201-S1203 are described below for each case.
First, n=2, i.e. the multi-split air conditioner is formed by connecting two external units in parallel, and the maximum protection currents of the two external units are I respectively max1 、I max2 And I max1 ≤I max2 The method comprises the steps of carrying out a first treatment on the surface of the The current limit is I limt 。
First of all for I max1 And I max2 Sequencing from big to small to obtain I max2 、I max1 . Then, two total currents are calculated: i max2 、I max2 +I max1 。
If I max2 ≤I limt <I max2 +I max1 And determining the maximum number of the external machine modules to be started to be 2.
If I limt <I max2 And determining the maximum number of the external machine modules to be started to be 1.
Second, n=3, i.e. the multi-split air conditioner is formed by connecting 3 external machine modules in parallel, and the maximum protection currents of the 3 external machine modules are I respectively max1 、I max2 、I max3 And I max1 ≤I max2 ≤I max3 The method comprises the steps of carrying out a first treatment on the surface of the The current limit is I limt 。
First of all for I max1 、I max2 、I max3 Sequencing from big to small to obtain I max3 、I max2 、I max1 . Then, three total currents were calculated: i max3 、I max3 +I max2 、I max3 +I max2 +I max1 。
If I max2 +I max1 ≤I limt <I max3 +I max2 +I max1 Then confirm to wait for opening outsideThe maximum number of machine modules is 3.
If I max3 ≤I limt <I max2 +I max1 And determining the maximum number of the external machine modules to be started to be 2.
If I limt <I max3 And determining the maximum number of the external machine modules to be started to be 1.
Thirdly, n=4, namely the multi-split air conditioner is formed by connecting 4 external machine modules in parallel, and the maximum protection currents of the 4 external machine modules are respectively I max1 、I max2 、I max3 、I max4 And I max1 ≤I max2 ≤I max3 ≤I max4 The method comprises the steps of carrying out a first treatment on the surface of the The current limit is I limt 。
First of all for I max1 、I max2 、I max3 、I max4 Sequencing from big to small to obtain I max4 、I max3 、I max2 、I max1 . Then, 4 total currents were calculated: i max4 、I max4 +I max3 、I max4 +I max3 +I max2 、I max4 +I max3 +I max2 +I max1 。
If I max4 +I max3 +I max2 ≤I limt <I max4 +I max3 +I max2 +I max1 And determining the maximum number of the external machine modules to be started to be 4.
If I max4 +I max3 ≤I limt <I max4 +I max3 +I max2 And determining the maximum number of the external machine modules to be started to be 3.
If I max4 ≤I limt <I max4 +I max3 And determining the maximum number of the external machine modules to be started to be 1.
If I limt <I max4 And determining the maximum number of the external machine modules to be started to be 1.
Optionally, after determining the maximum number of the external machine modules to be started, the external machine modules to be started need to be started according to the actual situation of the multi-split air conditioner. The number of the external machine modules to be started can be smaller than or equal to the maximum number of the external machine modules to be started. Generally, when the load of the multi-split air conditioner is smaller, the corresponding external machine modules with the number smaller than the maximum number of the external machine modules to be started can be started; when the load of the multi-split air conditioner is large, the outer machine modules with the number being the maximum number of the outer machine modules to be started can be started.
Thus, step S130 may include sub-steps S1301-S1303 described below.
S1301, determining the number of the started internal machines.
S1302, if the number of the started internal machines is less than half of the total number of the internal machines, the starting number is less than the maximum number of the external machine modules to be started.
In this embodiment, if the number of the opened internal units is less than half of the total number of the internal units, the load representing the multi-split air conditioner is smaller, and correspondingly, a smaller number of external unit modules can be opened.
For example, for n=3, i.e. the external air conditioner is 3 external modules connected in parallel. If I max2 +I max3 ≤I limt ＜I max1 +I max2 +I max3 And the determined maximum number of the modules to be opened is 3. When the number of the started internal machines is less than half of the total number of the internal machines, a single external machine module or two external machine modules are started to operate preferentially. And due to I max2 +I max3 ≤I limt And when a single external machine module or two external machine modules are started to operate, the external machine module is not influenced by the limited electric current.
And S1303, if the number of the started internal machines is greater than or equal to half of the total number of the internal machines, starting the external machine modules to be started, wherein the number of the started external machine modules is equal to the maximum number of the external machine modules to be started.
In this embodiment, if the number of the opened internal units is greater than or equal to half of the total number of the internal units, the load of the multi-split air conditioner is larger, and correspondingly, a larger number of external unit modules can be opened.
For example, for n=3, i.e. the external air conditioner is 3 external modules connected in parallel. If I max2 +I max3 ≤I limt ＜I max1 +I max2 +I max3 And the determined maximum number of the modules to be opened is 3. And when the number of the started internal machines is greater than half of the total number of the internal machines, starting 3 external machine modules. Due to I limt ＜I max1 +I max2 +I max3 When the 3 external machine modules are represented to operate, the operating current of the multi-split air conditioner may exceed the limit current. Therefore, in this case, it is necessary to reduce the frequency limiting current and the frequency reducing current of each external machine module in order to avoid that the operation current of the multi-split air conditioner exceeds the frequency limiting current.
Optionally, when the number of the external machine modules to be started is equal to the maximum number of the external machine modules to be started, the preset frequency-limiting current and the preset frequency-limiting current can be reduced according to the following mode, so as to obtain the corrected frequency-limiting current and the corrected frequency-limiting current. Step S140 may include sub-steps S1401-S1403 described below.
And S1401, if the maximum number of the external machine modules to be started is n, taking the nth total current as the correction current.
S1402, according to the correction current, the limiting current and the limiting frequency current, using formula I x ′＝A×I limt /I re ×I x And calculating to obtain the corrected frequency limiting current.
S1403, based on the correction current, the limiting current and the down-conversion current, using formula I j ′＝A×I limt /I re ×I j And calculating to obtain the corrected down-conversion current.
Wherein I is x 、I j Limiting frequency current and reducing frequency current respectively; i x ' and I j ' corrected frequency limited current and corrected down current, respectively; a is a coefficient; i limt Limiting current, I re To correct the current.
In this embodiment, the above steps S1401 to S1403 are described for the case where N has a value of 2 to 4.
First, when n=2, the frequency limiting current and the down-conversion current are I x 、I j 。
If I max2 ≤I limt ＜I max1 +I max2 I.e. to be openedThe maximum number of the external machine starting modules is 2. When the number of the external machine modules to be started is 2, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current which is I x ′＝A×I limt /(I max1 +I max2 )×I x The obtained corrected down-conversion current is I j ′＝A×I limt /(I max1 +I max2 )×I j Wherein A can be set empirically by the skilled artisan, typically A is in the range of [0.9,1 ]]For example, a may take 1.
If I limt ＜I max2 I.e. the maximum number of the external machine modules to be started is 1. When the number of the external machine modules to be started is 1, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current I x ′＝A×I limt /I max2 ×I x The obtained corrected down-conversion current is I j ′＝A×I limt /I max2 ×I j 。
Second, when n=3, the frequency limiting current and the down-conversion current are respectively I x 、I j 。
If I max2 +I max3 ≤I limt ＜I max1 +I max2 +I max3 I.e. the maximum number of the external machine modules to be started is 3. When the number of the external machine modules to be started is 3, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current which is I x ′＝A×I limt /(I max1 +I max2 +I max3 )×I x The obtained corrected down-conversion current is I j ′＝A×I limt /(I max1 +I max2 +I max3 )×I j 。
If I max3 ≤I limt ＜I max2 +I max3 I.e. the maximum number of the external machine modules to be started is 2. When the number of the external machine modules to be started is 2, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current which is I x ′＝A×I limt /(I max2 +I max3 )×I x The obtained corrected down-conversion current is I j ′＝A×I limt /(I max2 +I max3 )×I j 。
If I limt ＜I max3 I.e. the maximum number of the external machine modules to be started is 1. When the number of the external machine modules to be started is 1, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current I x ′＝A×I limt /I max3 ×I x The obtained corrected down-conversion current is I j ′＝A×I limt /I max3 ×I j 。
Third, when n=4, the frequency limiting current and the frequency reducing current are respectively I x 、I j 。
If I max2 +I max3 +I max4 ≤I limt ＜I max1 +I max2 +I max3 +I max4 I.e. the maximum number of the external machine modules to be started is 4. When the number of the external machine modules to be started is 4, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current which is I x ′＝A×I limt /(I max1 +I max2 +I max3 +I max4 )×I x The obtained corrected down-conversion current is I j ′＝A×I limt /(I max1 +I max2 +I max3 +I max4 )×I j 。
If I max3 +I max4 ≤I limt ＜I max2 +I max3 +I max4 I.e. the maximum number of the external machine modules to be started is 3. When the number of the external machine modules to be started is 3, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current which is I x ′＝A×I limt /(I max2 +I max3 +I max4 )×I x The obtained corrected down-conversion current is I j ′＝A×I limt /(I max2 +I max3 +I max4 )×I j 。
If I max4 ≤I limt ＜I max3 +I max4 I.e. the maximum number of the external machine modules to be started is 2. When the number of the external machine modules to be started is 2, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current which is I x ′＝A×I limt /(I max3 +I max4 )×I x The obtained corrected down-conversion current is I j ′＝A×I limt /(I max3 +I max4 )×I j 。
If I limt ＜I max4 I.e. the maximum number of the external machine modules to be started is 1. When the number of the external machine modules to be started is 1, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current I x ′＝A×I limt /I max4 ×I x The obtained corrected down-conversion current is I j ′＝A×I limt /I max4 ×I j 。
Compared with the prior art, the embodiment has the following beneficial effects:
firstly, according to the air conditioner control method provided by the embodiment, the maximum number of the opened external machine modules is determined according to the electricity limiting current and the maximum protection current of each external machine module, so that the situation that the operation current is overlarge due to the fact that the number of the opened external machine modules is too large is avoided. And when the external machine modules with the maximum number are started, the frequency limiting current and the frequency reducing current are reduced so as to avoid the situation that the running current of the multi-split air conditioner exceeds the frequency limiting current and the multi-split air conditioner is protected and stopped.
And secondly, after the maximum number of the outer machine modules to be started is determined, the number of the modules to be started is determined according to the starting number of the inner machines, so that the loss of air conditioner resources can be reduced to a certain extent.
Referring to fig. 4, fig. 4 is a block diagram illustrating an air conditioner control device 200 according to the present embodiment. The air conditioner control device 200 is applied to a multi-split air conditioner, and comprises: an acquisition module 201, a determination module 202, an opening module 203 and a control module 204.
And the acquisition module 201 is used for acquiring the electricity limiting current of the multi-split air conditioner and the maximum protection current of each external unit module.
And the determining module 202 is configured to determine, if the sum of the maximum protection currents of all the external machine modules is greater than the limit current, the maximum number of external machine modules to be turned on according to the maximum protection current and the limit current of each external machine module.
And the starting module 203 is configured to start each external machine module to be started according to the maximum number of external machine modules to be started.
And the control module 204 is configured to reduce a preset frequency limiting current and a preset frequency reducing current according to the maximum number of the external machine modules to be started and the current limiting current when the number of the external machine modules to be started is equal to the maximum number, obtain a corrected frequency limiting current and a corrected frequency reducing current, and control each external machine module to be started to operate according to the corrected frequency limiting current and the corrected frequency reducing current.
Optionally, the number of the external machine modules is N.
The determining module 202 is further configured to:
sequencing the maximum protection current of each external machine module according to the sequence from big to small;
calculating N total currents based on each sequenced maximum protection current; wherein the nth total current is the sum of the first N maximum protection currents, N is more than or equal to 1 and less than or equal to N, and N is an integer;
if the electricity limiting current is larger than or equal to the ith-1 total current and smaller than the ith total current, determining that the maximum number of the external machine modules to be started is i; wherein i is more than or equal to 2 and less than or equal to N, and i is an integer.
Optionally, the determining module 202 is further configured to determine that the maximum number of external machine modules to be turned on is 1 if the limited current is less than the 1 st total current.
Optionally, the control module 204 is further configured to:
if the maximum number of the external machine modules to be started is n, taking the nth total current as the correction current;
based on the correction current, the limiting current, and the limiting frequency current, formula I is used x ′＝A×I limt /I re ×I x Calculating to obtain the corrected frequency-limiting current;
based on the correction current, the limiting current, and the down-conversion current, formula I is used j ′＝A×I limt /I re ×I j Calculating to obtain the corrected down-conversion current;
wherein I is x 、I j The frequency limiting current and the frequency reducing current are respectively; i x ' and I j ' the corrected frequency limited current and the corrected down-converted current, respectively; a is a coefficient; i limt For the limited current, I re For the correction current.
Optionally, the multi-split air conditioner further comprises a plurality of internal machines; the opening module 203 is further configured to:
determining the number of the started internal machines;
if the number of the started internal machines is less than half of the total number of the internal machines, starting the external machine modules to be started, wherein the number of the external machine modules to be started is less than the maximum number of the external machine modules to be started;
and if the number of the started internal machines is greater than or equal to half of the total number of the internal machines, starting the external machine modules to be started, wherein the number of the external machine modules to be started is equal to the maximum number of the external machine modules to be started.
Optionally, the control module 204 is further configured to:
and if the sum of the maximum protection currents of all the external machine modules is smaller than or equal to the electricity limiting current, starting each external machine module, and controlling each external machine module to operate according to the frequency reducing current and the frequency limiting current.
Optionally, the control module 204 is further configured to:
when the number of the external machine modules to be started is smaller than the maximum number, controlling each external machine module to be started to operate according to the frequency limiting current and the frequency reducing current.
It will be apparent to those skilled in the art that the specific operation of the air conditioner control device 200 is described for convenience and brevity. Reference may be made to the corresponding procedure in the foregoing method embodiments, and no further description is given here.
The embodiment also provides a multi-split air conditioner 100 for implementing the air conditioner control method. Referring to fig. 5, fig. 5 shows a block schematic diagram of a multi-split air conditioner 100 according to the present embodiment, where the multi-split air conditioner 100 includes a memory 101, a processor 102, an external unit module 103, and an internal unit 104. The memory 101, external machine module 103, and internal machine 104 are all coupled to the processor 102, such as a disk, ROM, or RAM, or any combination thereof. Illustratively, multi-split air conditioner 100 may also include program instructions stored in ROM, RAM, or other types of non-transitory storage media, or any combination thereof. The method of the present invention may be implemented in accordance with these program instructions.
The memory 101 is used to store programs, such as the air conditioner control device 200. The air conditioner control device 200 includes at least one software function module that may be stored in the memory 101 in the form of software or firmware (firmware), and the processor 102 executes the program to implement the air conditioner control method in this embodiment after receiving an execution instruction.
The Memory 101 may be, but is not limited to, a random access Memory (Random Access Memory, RAM), a Read Only Memory (ROM), a programmable Read Only Memory (Programmable Read-OnlyMemory, PROM), an erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), an electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.
The processor 102 may be an integrated circuit chip having signal processing capabilities. In the implementation process, the steps of the air conditioner control method in this embodiment may be completed by an integrated logic circuit of hardware in the processor 102 or an instruction in the form of software. The processor 102 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a micro control unit (Microcontroller Unit, MCU), a complex programmable logic device (Complex Programmable Logic Device, CPLD), a field programmable gate array (Field Programmable Gate Array, FPGA), an embedded ARM, and the like.
For ease of illustration, only one processor is depicted in multi-split air conditioner 100. However, it should be noted that the multi-split air conditioner 100 of the present invention may further include a plurality of processors, and thus the steps performed by one processor described in the present invention may also be performed by the plurality of processors in combination or separately. For example, if the processors of the multi-split air conditioner 100 perform the step a and the step B, it should be understood that the step a and the step B may be performed by two different processors together or performed separately in one processor. For example, the first processor performs step a, the second processor performs step B, or the first processor and the second processor together perform steps a and B.
The present embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when executed by the processor 102, implements the air conditioner control method disclosed in the above embodiment.
In summary, the method and device for controlling an air conditioner, a multi-split air conditioner and a storage medium provided by the embodiments of the present invention, the method includes: if the sum of the maximum protection currents of all the external machine modules is larger than the limit current of the multi-split air conditioner, determining the maximum number of the external machine modules to be started according to the maximum protection current and the limit current of each external machine module. And then, starting each external machine module to be started according to the maximum number of the external machine modules to be started, and reducing the frequency limiting current and the frequency reducing current according to the maximum number of the external machine modules to be started and the current limiting current when the number of the external machine modules to be started is equal to the maximum number. And further, the protection shutdown of the multi-split air conditioner of the external air conditioner caused by the fact that the running current of the external air conditioner is overlarge and exceeds the limit current is avoided.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. An air conditioner control method is characterized by being applied to a multi-split air conditioner; the method comprises the following steps:
acquiring the electricity limiting current of the multi-split air conditioner and the maximum protection current of each external unit module, wherein the number of the external unit modules is N, and the electricity limiting current refers to the maximum running current regulated by government;
if the sum of the maximum protection currents of all the external machine modules is larger than the limit current, determining the maximum number of the external machine modules to be started according to the maximum protection current of each external machine module and the limit current;
opening each external machine module to be opened according to the maximum number of the external machine modules to be opened;
when the number of the external machine modules to be started is equal to the maximum number, reducing preset frequency limiting current and frequency reducing current according to the maximum number of the external machine modules to be started and the current limiting current to obtain corrected frequency limiting current and corrected frequency reducing current, and controlling each external machine module to be started to operate according to the corrected frequency limiting current and the corrected frequency reducing current;
the step of determining the maximum number of the external machine modules to be started according to the maximum protection current and the limit current of each external machine module comprises the following steps:
sequencing the maximum protection current of each external machine module according to the sequence from big to small;
calculating N total currents based on each sequenced maximum protection current; wherein the nth total current is the sum of the first N maximum protection currents, N is more than or equal to 1 and less than or equal to N, and N is an integer;
if the electricity limiting current is larger than or equal to the ith-1 total current and smaller than the ith total current, determining that the maximum number of the external machine modules to be started is i; wherein i is more than or equal to 2 and less than or equal to N, i is an integer;
the step of reducing preset frequency-reducing current and frequency-limiting current according to the maximum number of the external machine modules to be started and the limit current to obtain corrected frequency-limiting current and corrected frequency-reducing current comprises the following steps:
if the maximum number of the external machine modules to be started is n, taking the nth total current as a correction current;
calculating the corrected frequency limiting current according to the corrected current, the limited current and the frequency limiting current by using a formula Ix' =A×Ilimt/Ire×Ix;
calculating the corrected down-conversion current according to the corrected current, the limited current and the down-conversion current by using a formula Ij' =a×ilimt/ire×ij;
wherein Ix and Ij are the frequency limiting current and the frequency reducing current respectively; ix 'and Ij' are the corrected frequency limited current and the corrected down-converted current, respectively; a is a coefficient; ilimt is the limit current and Ire is the correction current.
2. The method of claim 1, wherein the step of determining the maximum number of external machine modules to be turned on based on the maximum protection current and the limit current of each of the external machine modules further comprises:
and if the limited current is smaller than the 1 st total current, determining that the maximum number of the external machine modules to be started is 1.
3. The method of claim 1, wherein the multi-split air conditioner further comprises a plurality of internal machines; the step of starting each external machine module to be started according to the maximum number of the external machine modules to be started comprises the following steps:
determining the number of the started internal machines;
if the number of the started internal machines is less than half of the total number of the internal machines, starting the external machine modules to be started, wherein the number of the external machine modules to be started is less than the maximum number of the external machine modules to be started;
and if the number of the started internal machines is greater than or equal to half of the total number of the internal machines, starting the external machine modules to be started, wherein the number of the external machine modules to be started is equal to the maximum number of the external machine modules to be started.
4. The method of claim 1, further comprising, after the step of obtaining the electric power limit current of the multi-split air conditioner and the maximum protection current of each of the outdoor units, the step of: and if the sum of the maximum protection currents of all the external machine modules is smaller than or equal to the electricity limiting current, starting each external machine module, and controlling each external machine module to operate according to the frequency reducing current and the frequency limiting current.
5. The method according to claim 1, wherein after the step of starting each external machine module to be started up according to the maximum number of external machine modules to be started up, the method further comprises:
when the number of the external machine modules to be started is smaller than the maximum number, controlling each external machine module to be started to operate according to the frequency limiting current and the frequency reducing current.
6. An air conditioner control device is characterized by being applied to a multi-split air conditioner; the air conditioner control device includes:
the acquisition module is used for acquiring the electricity limiting current of the multi-split air conditioner and the maximum protection current of each external machine module, wherein the number of the external machine modules is N, and the electricity limiting current refers to the maximum running current regulated by the government;
the determining module is used for determining the maximum number of the external machine modules to be started according to the maximum protection current and the limit current of each external machine module if the sum of the maximum protection currents of all the external machine modules is larger than the limit current;
the starting module is used for starting each external machine module to be started according to the maximum number of the external machine modules to be started;
the control module is used for reducing preset frequency limiting current and frequency reducing current according to the maximum number of the external machine modules to be started and the limit current when the number of the external machine modules to be started is equal to the maximum number, obtaining corrected frequency limiting current and corrected frequency reducing current, and controlling each external machine module to be started to operate according to the corrected frequency limiting current and the corrected frequency reducing current;
the determining module is specifically configured to: sequencing the maximum protection current of each external machine module according to the sequence from big to small;
calculating N total currents based on each sequenced maximum protection current; wherein the nth total current is the sum of the first N maximum protection currents, N is more than or equal to 1 and less than or equal to N, and N is an integer;
if the electricity limiting current is larger than or equal to the ith-1 total current and smaller than the ith total current, determining that the maximum number of the external machine modules to be started is i; wherein i is more than or equal to 2 and less than or equal to N, i is an integer;
the control module is specifically configured to: if the maximum number of the external machine modules to be started is n, taking the nth total current as a correction current;
calculating the corrected frequency limiting current according to the corrected current, the limited current and the frequency limiting current by using a formula Ix' =A×Ilimt/Ire×Ix;
calculating the corrected down-conversion current according to the corrected current, the limited current and the down-conversion current by using a formula Ij' =a×ilimt/ire×ij;
wherein Ix and Ij are the frequency limiting current and the frequency reducing current respectively; ix 'and Ij' are the corrected frequency limited current and the corrected down-converted current, respectively; a is a coefficient; ilimt is the limit current and Ire is the correction current.
7. The utility model provides a many online air conditioner which characterized in that, many online air conditioner includes:
one or more processors;
a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the air conditioning control method of any of claims 1-5.
8. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the air-conditioning control method according to any one of claims 1 to 5.
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