CN115111749A - 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
CN115111749A
CN115111749A CN202210943322.4A CN202210943322A CN115111749A CN 115111749 A CN115111749 A CN 115111749A CN 202210943322 A CN202210943322 A CN 202210943322A CN 115111749 A CN115111749 A CN 115111749A
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current
started
modules
air conditioner
maximum number
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CN115111749B (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 and 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: and if the sum of the maximum protection currents of all the outer machine modules is greater than the current limit of the multi-split air conditioner, determining the maximum number of the outer machine modules to be started according to the maximum protection current and the current limit of each outer machine module. And then, according to the maximum number of the to-be-opened outer machine modules, opening each to-be-opened outer machine module, and when the number of the to-be-opened outer machine modules is equal to the maximum number, reducing the frequency limiting current and the frequency reducing current according to the maximum number of the to-be-opened outer machine modules and the current limiting current. And further, the situation that the operation current of the external on-line air conditioner is too large to exceed the current limit, so that the external on-line air conditioner is protected to stop.

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 and device, a multi-split air conditioner and a storage medium.
Background
The multi-split air conditioner comprises a plurality of outdoor unit modules connected in parallel, and is mainly used for large-scale commercial office buildings. Due to 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 the actual use effect of a user is influenced in such a way.
Disclosure of Invention
The present invention provides, for example, an air conditioner control method, an air conditioner control apparatus, a multi-split air conditioner, and a storage medium, which are capable of determining the maximum number of open outdoor unit modules according to a power limiting current and a maximum protection current of each outdoor unit module, and preventing the number of open outdoor unit modules from being excessive, which may result in an excessive operating current. And when the maximum number of the outer machine modules are started, reducing the frequency limiting current and the frequency reducing current so as to avoid the situation that the running current of the multi-split air conditioner exceeds the current limiting current to cause the protective shutdown of the multi-split air conditioner.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
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 outer unit module;
if the sum of the maximum protection currents of all the outer machine modules is larger than the electricity limiting current, determining the maximum number of the outer machine modules to be started according to the maximum protection current and the electricity limiting current of each outer machine module;
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 to-be-started outer machine modules is equal to the maximum number, reducing preset frequency limiting current and preset frequency reducing current according to the maximum number of the to-be-started outer machine modules and the electricity limiting current to obtain corrected frequency limiting current and corrected frequency reducing current, and controlling each to-be-started outer machine module to operate according to the corrected frequency limiting current and the corrected frequency reducing current.
Compared with the prior art, according to the air conditioner control method provided by the embodiment of the invention, when the sum of the maximum protection currents of all the outer unit modules is greater than the electricity limiting current of the multi-split air conditioner, the maximum number of the outer unit modules to be started is determined according to the maximum protection current and the electricity limiting current of each outer unit module. And then, according to the maximum number of the to-be-opened outer machine modules, opening each to-be-opened outer machine module, and when the number of the to-be-opened outer machine modules is equal to the maximum number, reducing the frequency limiting current and the frequency reducing current according to the maximum number of the to-be-opened outer machine modules and the current limiting current. And further, the situation that the operation current of the external on-line air conditioner is too large to exceed the current limit, so that the external on-line air conditioner is protected to stop.
In a possible implementation manner, the number of the external unit modules is N; the step of determining the maximum number of the outdoor unit modules to be opened according to the maximum protection current and the electricity limiting current of each outdoor unit module comprises the following steps:
sequencing the maximum protection current of each outdoor unit module from large to small;
calculating to obtain 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 greater than or equal to the (i-1) th total current and less than the ith total current, determining that the maximum number of the outdoor unit 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 a possible embodiment, the step of determining the maximum number of the outdoor unit modules to be turned on according to the maximum protection current and the current limit of each outdoor unit module further includes:
and if the electricity limiting current is smaller than the 1 st total current, determining that the maximum number of the to-be-started outer machine modules is 1.
In a possible embodiment, the step of reducing the preset down-conversion current and the preset frequency-limiting current according to the maximum number of the to-be-started outdoor unit modules and the power-limiting current to obtain a modified frequency-limiting current and a modified down-conversion current includes:
if the maximum number of the outdoor unit modules to be started is n, taking the nth total current as the correction current;
according to the correction current, the electricity limiting current and the frequency limiting current, a formula I is utilized x ′＝A×I limt /I re ×I x Calculating to obtain the corrected frequency limiting current;
according to the correction current, the limiting current and the down-conversion current, a formula I is utilized j ′＝A×I limt /I re ×I j Calculating to obtain the corrected down-conversion current;
wherein, I x 、I j The frequency limiting current and the frequency reducing current are respectively; i is x ' and I j ' the modified limiter current and the modified down-converter current are respectively; a is a coefficient; i is limt For said current limiting, I re Is the correction current.
In one possible embodiment, the multi-split air conditioner further comprises a plurality of internal machines; the step of opening each of the outdoor unit modules to be opened according to the maximum number of the outdoor unit modules to be opened includes:
determining the number of 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, the number of which is less than the maximum number of the external machine modules to be started;
and if the number of the started inner machines is more than or equal to half of the total number of the inner machines, starting the maximum number of the to-be-started outer machine modules, wherein the number of the to-be-started outer machine modules is equal to the maximum number of the to-be-started outer machine modules.
In one possible embodiment, after the step of obtaining the current limit of the multi-split air conditioner and the maximum protection current of each outer unit module, the method further includes:
and if the sum of the maximum protection currents of all the external machine modules is less 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 reduction current and the frequency limiting current.
In one possible embodiment, after the step of opening each of the to-be-opened outdoor unit modules according to the maximum number of the to-be-opened outdoor unit modules, the method further includes:
and when the number of the to-be-started outer machine modules is smaller than the maximum number, controlling each to-be-started outer machine module to operate according to the frequency limiting current and the frequency reducing current.
In a second aspect, an embodiment of the present invention further provides an air conditioner control device, which is applied to a multi-split air conditioner; the air conditioning control device includes:
the acquisition module is used for acquiring the current limit of the multi-split air conditioner and the maximum protection current of each outer unit module;
the determining module is used for determining the maximum number of the outdoor unit modules to be started according to the maximum protection current and the electricity limiting current of each outdoor unit module if the sum of the maximum protection currents of all the outdoor unit modules is larger than the electricity limiting current;
the opening module is used for opening each to-be-opened outer machine module according to the maximum number of the to-be-opened outer machine modules;
and the control module is used for reducing preset frequency limiting current and frequency reducing current according to the maximum number of the to-be-started outer machine modules and the electricity limiting current when the number of the to-be-started outer machine modules is equal to the maximum number, obtaining corrected frequency limiting current and corrected frequency reducing current, and controlling each to-be-started outer machine module 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, including:
one or more processors;
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 air conditioning control method described above.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the air conditioner control method described above.
Compared with the prior art, 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, wherein the method comprises the following steps: and if the sum of the maximum protection currents of all the outer machine modules is greater than the current limit of the multi-split air conditioner, determining the maximum number of the outer machine modules to be started according to the maximum protection current and the current limit of each outer machine module. And then, starting each to-be-started outer machine module according to the maximum number of the to-be-started outer machine modules, and reducing the frequency limiting current and the frequency reducing current according to the maximum number of the to-be-started outer machine modules and the power limiting current when the number of the to-be-started outer machine modules is equal to the maximum number. And further, the condition that the operation current of the external on-line air conditioner is overlarge and exceeds the current limit, so that the multi-on-line air conditioner is protected to stop.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic flow chart of an air conditioner control method according to an embodiment of the present invention.
Fig. 2 is another schematic flow chart of an air conditioner control method according to an embodiment of the present invention.
Fig. 3 is a schematic flowchart of another air conditioner control method according to an embodiment of the present invention.
Fig. 4 is a block diagram of an air conditioning control device according to an embodiment of the present invention.
Fig. 5 is a schematic block diagram of a multi-split air conditioner according to an embodiment of the present invention.
Icon: 100-a multi-split air conditioner; 101-a memory; 102-a processor; 103-an outdoor unit module; 104-inner machine; 200-air conditioning control device; 201-an acquisition module; 202-a determination module; 203-opening module; 204-control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of 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 present invention, 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 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 invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying 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 module outdoor units connected in parallel, and is mainly used for large-scale commercial office buildings. Due to government power limit requirements, the operating current of the multi-split air conditioning unit is often limited so as not to violate the government power limit requirements.
In the prior art, generally, the maximum operation frequency of the unit is limited through dial-up or parameter setting to limit the operation current, but the actual use effect of a user is influenced by the mode.
In view of the above problems, the present embodiment provides an air conditioner control method, which determines the maximum number of opened outdoor unit modules according to a current limit and the maximum protection current of each outdoor unit module, so as to avoid that the number of opened outdoor unit modules is too large, which results in too large running current. And when the maximum number of the outer machine modules are started, reducing the frequency limiting current and the frequency reducing current so as to avoid the situation that the running current of the multi-split air conditioner exceeds the current limiting current to cause the protective shutdown of the multi-split air conditioner.
On the basis of the above, the air conditioning control method provided in the present embodiment is described. Referring to fig. 1, fig. 1 is a schematic flow chart illustrating an air conditioner control method according to the present embodiment, where the method includes the following steps S110 to S140.
And 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 power-limited current refers to a maximum operation current specified by the government, and when the operation current of the multi-connected air conditioner is greater than the power-limited current, the multi-connected air conditioner is powered off and stops.
The maximum protection current is the maximum value of the set operation current allowed for the outer unit module, and when the operation current of the outer unit module exceeds the maximum protection current corresponding to the outer unit module, the multi-split air conditioner controls the compressor of the outer unit module to stop operating, so that the coincidence of the multi-split air conditioner is reduced, and the operation power is reduced.
And S120, if the sum of the maximum protection currents of all the outer machine modules is greater than the electricity limiting current, determining the maximum number of the outer machine modules to be started according to the maximum protection current and the electricity limiting current of each outer machine module.
In this embodiment, if the sum of the maximum protection currents of all the outer unit modules is greater than the current limit current, it is indicated that when all the outer unit modules are turned on, the operating current of the multi-split air conditioner may exceed the current limit current, which may cause the multi-split air conditioner to be powered off and shut down. Therefore, it is necessary to limit the number of the external unit modules to be turned on, or to adjust the frequency limiting current and the frequency reducing current of the external unit modules.
And S130, opening each to-be-opened outer machine module according to the maximum number of the to-be-opened outer machine modules.
And S140, when the number of the to-be-started outer machine modules is equal to the maximum number, reducing preset frequency limiting current and preset frequency reducing current according to the maximum number and the electricity limiting current of the to-be-started outer machine modules to obtain corrected frequency limiting current and corrected frequency reducing current, and controlling each to-be-started outer machine module to operate according to the corrected frequency limiting current and the corrected frequency reducing current.
In this embodiment, the frequency limiting current, the down-conversion current, and the maximum protection current are current protection values set according to a certain gradient, and their magnitude relationships are as follows: frequency limited current < down current < maximum protection current. When the running current of the outer machine module reaches the frequency limiting current, the running frequency of a compressor of the outer machine module is limited not to increase; when the operating current of the outer machine module reaches the frequency reduction current, the operating frequency of a compressor of the outer machine module is reduced; and when the running current of the outer machine module reaches the maximum protection current, controlling the compressor of the outer machine module to stop running.
The number of the outdoor unit modules to be opened may be less than or equal to the maximum number of the outdoor unit modules to be opened. When the number of the external unit 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 operating current of the external air conditioner may exceed the current limiting current. Therefore, it is required to reduce the frequency limiting current and the frequency reducing current of the outer unit 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 outdoor unit modules according to the power limiting current and the maximum protection current of each outdoor unit module, and avoids the phenomenon that the number of the opened outdoor unit modules is too large, so that the running current is too large. And when the maximum number of the outer machine modules are started, reducing the frequency limiting current and the frequency reducing current so as to avoid the situation that the running current of the multi-split air conditioner exceeds the current limiting current to cause the protective shutdown of the multi-split air conditioner.
Optionally, if the sum of the maximum protection currents of all the outdoor unit modules is less than or equal to the electricity limiting current, it is characterized that all the outdoor unit modules can be turned on, and the operation of each outdoor unit module is not limited.
Therefore, on the basis of fig. 1, please refer to fig. 2, after step S110, the air conditioning control method may further protect step S111 described below.
And S111, if the sum of the maximum protection currents of all the outdoor unit modules is less than or equal to the electricity limiting current, starting each outdoor unit module, and controlling each outdoor unit module to operate according to the frequency reduction current and the frequency limiting current.
Optionally, after each to-be-opened outer machine module is opened according to the maximum number of the to-be-opened outer machine modules, if the number of the to-be-opened outer machine modules is smaller than the maximum number, the operation of the to-be-opened outer machine modules is not affected by the limited current, and the to-be-opened outer machine modules can operate according to the preset limited current and the preset reduced current.
Therefore, on the basis of fig. 2, please refer to fig. 3 after step S130, the air conditioner controlling method may further include the following step S150.
And S150, when the number of the to-be-started outer machine modules is smaller than the maximum number, controlling each to-be-started outer machine module to operate according to the frequency limiting current and the frequency reducing current.
In the embodiment, the number of the external unit modules to be opened is limited, so that the situation that the running current of the multi-split air conditioner exceeds the electricity limiting current due to the fact that the number of the external unit modules to be opened is too large is avoided.
Optionally, since the maximum protection currents of the outdoor unit modules may be different, generally, when the sum of the maximum protection currents of all the outdoor unit modules is greater than the current limit current, the maximum number of the outdoor unit modules to be opened needs to be determined according to the relationship between the maximum protection current and the current limit current of each outdoor unit module.
Step S120 may include the following sub-steps S1201-S1203.
And S1201, sequencing the maximum protection current of each external unit module from large to small.
S1202, calculating to obtain 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 power limiting current is larger than or equal to the (i-1) th total current and smaller than the ith total current, determining that the maximum number of the outdoor unit 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, step S120 may further include the following sub-step S1204.
And S1204, if the electricity limiting current is smaller than the 1 st total current, determining that the maximum number of the outdoor unit modules to be started is 1.
In the present embodiment, assuming that the number of external unit modules is N and 2. ltoreq. N.ltoreq.4, the above steps S1201 to S1203 will be described for each case.
First, N is 2, that is, the multi-split air conditioner has two outdoor unit modules connected in parallel, and the maximum protection current of the two outdoor unit modules is I max1 、I max2 And I is max1 ≤I max2 (ii) a Current limit of I limt 。
Firstly to I max1 And I max2 Sorting according to the sequence from big to small to obtain I max2 、I max1 . Then, two total currents were calculated: i is max2 、I max2 +I max1 。
If I max2 ≤I limt <I max2 +I max1 And determining that the maximum number of the outdoor unit modules to be opened is 2.
If I limt <I max2 And determining that the maximum number of the outdoor unit modules to be opened is 1.
Secondly, N is 3, that is, the multi-split air conditioner has 3 outer machine modules connected in parallel, and the maximum protection current of the 3 outer machine modules is divided intoIs other than I max1 、I max2 、I max3 And I is max1 ≤I max2 ≤I max3 (ii) a Current limit of I limt 。
First to I max1 、I max2 、I max3 Sorting according to the sequence from big to small to obtain I max3 、I max2 、I max1 . Then, three total currents were calculated: i is max3 、I max3 +I max2 、I max3 +I max2 +I max1 。
If I max2 +I max1 ≤I limt <I max3 +I max2 +I max1 And determining that the maximum number of the outdoor unit modules to be opened is 3.
If I max3 ≤I limt <I max2 +I max1 And determining that the maximum number of the outdoor unit modules to be opened is 2.
If I limt <I max3 And determining that the maximum number of the outdoor unit modules to be opened is 1.
And thirdly, N is 4, that is, the multi-split air conditioner has 4 outer unit modules connected in parallel, and the maximum protection current of the 4 outer unit modules is I max1 、I max2 、I max3 、I max4 And I is max1 ≤I max2 ≤I max3 ≤I max4 (ii) a Current limit of I limt 。
First to I max1 、I max2 、I max3 、I max4 Sorting according to the sequence from big to small to obtain I max4 、I max3 、I max2 、I max1 . Then, 4 total currents were calculated: i is 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 that the maximum number of the outdoor unit modules to be opened is 4.
If I max4 +I max3 ≤I limt <I max4 +I max3 +I max2 And determining that the maximum number of the outdoor unit modules to be opened is 3.
If I max4 ≤I limt <I max4 +I max3 And determining that the maximum number of the outdoor unit modules to be opened is 1.
If I limt <I max4 And determining that the maximum number of the outdoor unit modules to be opened is 1.
Optionally, after the maximum number of the to-be-opened outer machine modules is determined, the to-be-opened outer machine modules need to be opened according to the actual situation of the multi-split air conditioner. The number of the to-be-opened outer machine modules can be less than or equal to the maximum number of the to-be-opened outer machine modules. Generally, when the load of the multi-split air conditioner is small, the corresponding outdoor unit modules with the number smaller than the maximum number of the outdoor unit modules to be started can be started; when the load of the multi-split air conditioner is large, the outdoor unit modules with the maximum number of the outdoor unit modules to be opened can be opened.
Thus, step S130 may include sub-steps S1301-S1303 described below.
And S1301, determining the number of the started internal machines.
S1302, if the number of the turned-on internal machines is less than half of the total number of the internal machines, turning on the external machine modules to be turned on, the number of which is less than the maximum number of the external machine modules to be turned on.
In this embodiment, if the number of the started internal machines is less than half of the total number of the internal machines, the load representing the multi-split air conditioner is smaller, and accordingly, a smaller number of external machine modules can be started.
For example, for N ═ 3, that is, the external air conditioner is formed by connecting 3 external unit modules in parallel. If I max2 +I max3 ≤I limt ＜I max1 +I max2 +I max3 That is, the determined maximum number of the modules to be opened is 3. And when the number of the started internal machines is less than half of the total number of the internal machines, preferentially starting a single external machine module or two external machine modules to operate. And, due to I max2 +I max3 ≤I limt And when the single outer machine module or the two outer machine modules are started to operate, the influence of limited electric current is avoided.
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 external machine modules to be started is equal to the maximum number of the external machine modules to be started.
In this embodiment, if the number of the started internal machines is greater than or equal to half of the total number of the internal machines, the load representing the multi-split air conditioner is large, and accordingly, a large number of external machine modules can be started.
For example, for N ═ 3, that is, the external air conditioner is formed by connecting 3 external unit modules in parallel. If I max2 +I max3 ≤I limt ＜I max1 +I max2 +I max3 That is, the determined maximum number of the modules to be opened is 3. And when the number of the started internal machines is more 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 outdoor unit modules are operated, the operation current of the multi-split air conditioner may exceed the electricity limiting current. Therefore, in this case, it is necessary to reduce the frequency-limited current and the down-converted current of each outer unit module in order to prevent the operating current of the multi-split air conditioner from exceeding the power-limited current.
Optionally, when the number of the to-be-started outer unit modules is equal to the maximum number of the to-be-started outer unit modules, the preset down-conversion current and the preset frequency-limiting current may be reduced according to the following manner, so as to obtain the corrected frequency-limiting current and the corrected down-conversion current. Step S140 may include the following sub-steps S1401-S1403.
S1401, if the maximum number of the external unit modules to be turned on is n, the nth total current is used as the correction current.
S1402, according to the correction current, the current limiting current and the frequency limiting current, utilizing formula I x ′＝A×I limt /I re ×I x And calculating to obtain the corrected frequency limiting current.
S1403, according to the correction current, the current limiting current and the frequency reduction current, a formula I is utilized j ′＝A×I limt /I re ×I j Calculating a corrected dropFrequency current.
Wherein, I x 、I j Respectively a frequency limiting current and a frequency reducing current; i is x ' and I j ' correction frequency-limiting current and correction frequency-reducing current respectively; a is a coefficient; i is limt For limiting the current, I re To correct the current.
In this embodiment, the above steps S1401 to S1403 are described for the case where N is 2 to 4.
First, when N is 2, the limited frequency current and the down frequency current are I respectively x 、I j 。
If I max2 ≤I limt ＜I max1 +I max2 That is, the maximum number of the outdoor unit modules to be opened is 2. When the number of the outdoor unit modules to be started is 2, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current 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 Where A can be set empirically by the skilled person, typically A ranges from [0.9, 1]For example, a may take 1.
If I limt ＜I max2 That is, the maximum number of the outdoor unit modules to be opened is 1. When the number of the outdoor unit 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 is 3, the limited frequency current and the down frequency current are I respectively x 、I j 。
If I max2 +I max3 ≤I limt ＜I max1 +I max2 +I max3 That is, the maximum number of the outdoor unit modules to be opened is 3. When the number of the outdoor unit modules to be started is 3, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current 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 That is, the maximum number of the outdoor unit modules to be opened is 2. When the number of the outdoor unit modules to be started is 2, 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 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 That is, the maximum number of the outdoor unit modules to be opened is 1. When the number of the outdoor unit 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 。
Thirdly, when N is 4, the frequency limiting current and the frequency reducing current are I respectively x 、I j 。
If I max2 +I max3 +I max4 ≤I limt ＜I max1 +I max2 +I max3 +I max4 That is, the maximum number of the outdoor unit modules to be opened is 4. When the number of the outdoor unit modules to be started is 4, reducing the frequency limiting current and the frequency reducing current to obtain a corrected frequency limiting current 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 That is, the maximum number of the outdoor unit modules to be opened is 3. When waiting to be openedWhen the number of the machine modules is 3, 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 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 That is, the maximum number of the outdoor unit modules to be opened is 2. When the number of the outdoor unit modules to be started is 2, 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 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 That is, the maximum number of the outdoor unit modules to be opened is 1. When the number of the outdoor unit 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:
first, according to the air conditioner control method provided in this embodiment, the maximum number of the opened outdoor unit modules is determined according to the power limiting current and the maximum protection current of each outdoor unit module, so that the phenomenon that the number of the opened outdoor unit modules is too large, which causes an excessive operating current, is avoided. And when the maximum number of the outdoor unit modules are started, reducing the frequency limiting current and the frequency reducing current so as to avoid the situation that the operation current of the multi-split air conditioner exceeds the electricity limiting current to cause the protective shutdown of the multi-split air conditioner.
Secondly, after determining the maximum number of the modules of the external unit to be started, determining the number of the modules to be started according to the starting number of the internal unit, and reducing the loss of air conditioner resources to a certain extent.
Referring to fig. 4, fig. 4 is a block diagram illustrating an air conditioning control device 200 according to the present embodiment. The air-conditioning control device 200 is applied to a multi-split air conditioner, and includes: an acquisition module 201, a determination module 202, a start module 203, and a control module 204.
The obtaining module 201 is configured to obtain a current limit of the multi-split air conditioner and a maximum protection current of each external unit module.
A determining module 202, configured to determine the maximum number of the external unit modules to be started according to the maximum protection current and the power limiting current of each external unit module if the sum of the maximum protection currents of all the external unit modules is greater than the power limiting current.
And the opening module 203 is used for opening each to-be-opened outer machine module according to the maximum number of the to-be-opened outer machine modules.
And the control module 204 is configured to, when the number of the to-be-started outer unit modules is equal to the maximum number, reduce a preset frequency limiting current and a preset frequency reducing current according to the maximum number of the to-be-started outer unit modules and the current limiting current to obtain a modified frequency limiting current and a modified frequency reducing current, and control each to-be-started outer unit module to operate according to the modified frequency limiting current and the modified frequency reducing current.
Optionally, the number of the external unit modules is N.
A determining module 202, further configured to:
sequencing the maximum protection current of each outdoor unit module from large to small;
calculating to obtain 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 greater than or equal to the (i-1) th total current and less than the ith total current, determining that the maximum number of the outdoor unit 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 the to-be-started outer machine modules is 1 if the current limit current is smaller than the 1 st total current.
Optionally, the control module 204 is further configured to:
if the maximum number of the outdoor unit modules to be started is n, taking the nth total current as the correction current;
according to the correction current, the electricity limiting current and the frequency limiting current, a formula I is utilized x ′＝A×I limt /I re ×I x Calculating to obtain the corrected frequency limiting current;
according to the correction current, the electricity limiting current and the frequency reduction current, a formula I is utilized j ′＝A×I limt /I re ×I j Calculating to obtain the corrected down-conversion current;
wherein, I x 、I j The frequency limiting current and the frequency reducing current are respectively; i is x ' and I j ' the modified limiting current and the modified down-converting current are respectively; a is a coefficient; i is limt For said current limiting, I re Is the correction current.
Optionally, the multi-split air conditioner further includes a plurality of internal machines; the enabling module 203 is further configured to:
determining the number of 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, the number of which is less than the maximum number of the external machine modules to be started;
and if the number of the started inner machines is more than or equal to half of the total number of the inner machines, starting the maximum number of the to-be-started outer machine modules, wherein the number of the to-be-started outer machine modules is equal to the maximum number of the to-be-started outer machine modules.
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 less 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 reduction current and the frequency limiting current.
Optionally, the control module 204 is further configured to:
and when the number of the to-be-started outer machine modules is smaller than the maximum number, controlling each to-be-started outer machine module 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 above-described specific operation of the air conditioning control apparatus 200 is provided for convenience and brevity of description. Reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.
The embodiment also provides a multi-split air conditioner 100 for implementing the air conditioner control method. Referring to fig. 5, fig. 5 is a block schematic diagram of a multi-split air conditioner 100 according to the present embodiment, wherein the multi-split air conditioner 100 includes a memory 101, a processor 102, an outdoor unit module 103, and an indoor unit 104. The memory 101, the external unit module 103, and the internal unit 104 are all connected to the processor 102, such as a disk, ROM, or RAM, or any combination thereof. Illustratively, the multi-split air conditioner 100 may further 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 can be implemented according to these program instructions.
The memory 101 is used to store a program, such as the air conditioning control device 200. The air conditioner control device 200 includes at least one software functional module which 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 the present embodiment after receiving the execution instruction.
The Memory 101 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.
The processor 102 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the air conditioner control method in this embodiment may be implemented by integrated logic of hardware in the processor 102 or instructions in the form of software. The processor 102 may be a general-purpose processor, and includes a Central Processing Unit (CPU), a Micro Control Unit (MCU), a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), and an embedded ARM.
For convenience of explanation, only one processor is described in the multi-split air conditioner 100. However, it should be noted that the multi-split air conditioner 100 in 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 a plurality of processors in combination or individually. For example, if the processors of the multi-split air conditioner 100 execute step a and step B, it should be understood that step a and step B may be executed by two different processors together or executed in one processor separately. For example, a first processor performs step a and a second processor performs step B, or the first processor and the second processor perform steps a and B together.
The present embodiment also provides a computer-readable storage medium on which a computer program is stored, the computer program implementing the air conditioner control method disclosed in the above embodiments when executed by the processor 102.
In summary, in the air conditioner control method and apparatus, the multi-split air conditioner and the storage medium provided in the embodiments of the present invention, the method includes: and if the sum of the maximum protection currents of all the outer machine modules is greater than the current limit of the multi-split air conditioner, determining the maximum number of the outer machine modules to be started according to the maximum protection current and the current limit of each outer machine module. And then, according to the maximum number of the to-be-opened outer machine modules, opening each to-be-opened outer machine module, and when the number of the to-be-opened outer machine modules is equal to the maximum number, reducing the frequency limiting current and the frequency reducing current according to the maximum number of the to-be-opened outer machine modules and the current limiting current. And further, the situation that the operation current of the external on-line air conditioner is too large to exceed the current limit, so that the external on-line air conditioner is protected to stop.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The 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 outdoor unit module;
if the sum of the maximum protection currents of all the outer machine modules is larger than the electricity limiting current, determining the maximum number of the outer machine modules to be started according to the maximum protection current and the electricity limiting current of each outer machine module;
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 to-be-started outer machine modules is equal to the maximum number, reducing preset frequency limiting current and preset frequency reducing current according to the maximum number of the to-be-started outer machine modules and the power limiting current to obtain corrected frequency limiting current and corrected frequency reducing current, and controlling each to-be-started outer machine module to operate according to the corrected frequency limiting current and the corrected frequency reducing current.
2. The method of claim 1, wherein the number of the outdoor unit modules is N; the step of determining the maximum number of the outdoor unit modules to be opened according to the maximum protection current and the electricity limiting current of each outdoor unit module comprises the following steps:
sequencing the maximum protection current of each outdoor unit module from large to small;
calculating to obtain 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 current limit current is larger than or equal to the (i-1) th total current and smaller than the ith total current, determining that the maximum number of the outdoor unit 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.
3. The method of claim 2, wherein the step of determining the maximum number of outdoor unit modules to be turned on based on the maximum protection current and the limit current of each outdoor unit module further comprises:
and if the electricity limiting current is smaller than the 1 st total current, determining that the maximum number of the to-be-started outer machine modules is 1.
4. The method according to claim 2 or 3, wherein the step of reducing the preset down-conversion current and the preset frequency-limiting current according to the maximum number of the to-be-started outer unit modules and the power-limiting current to obtain a modified frequency-limiting current and a modified down-conversion current comprises:
if the maximum number of the outdoor unit modules to be started is n, taking the nth total current as a correction current;
according to the correction current, the current limiting current and the frequency limiting current, a formula I is utilized x ′＝A×I limt /I re ×I x Calculating to obtain the corrected frequency limiting current;
according to the correction current, the electricity limiting current and the frequency reduction current, a formula I is utilized j ′＝A×I limt /I re ×I j Calculating to obtain the corrected down-conversion current;
wherein, I x 、I j The frequency limiting current and the frequency reducing current are respectively; I.C. A x ' and I j ' the modified limiter current and the modified down-converter current are respectively; a is a coefficient; i is limt For said current limiting, I re Is the correction current.
5. The method according to claim 1, wherein the multiple on-line air conditioner further comprises a plurality of internal machines; the step of opening each external machine module to be opened according to the maximum number of the external machine modules to be opened comprises the following steps:
determining the number of 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, the number of which is less than the maximum number of the external machine modules to be started;
and if the number of the started inner machines is more than or equal to half of the total number of the inner machines, starting the maximum number of the to-be-started outer machine modules.
6. The method as claimed in claim 1, wherein after the step of obtaining the power limiting current of the multi-connected air conditioner and the maximum protection current of each outdoor unit module, the method further comprises:
and if the sum of the maximum protection currents of all the external machine modules is less 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 reduction current and the frequency limiting current.
7. The method as claimed in claim 1, wherein after the step of opening each of the outdoor unit modules to be opened according to the maximum number of the outdoor unit modules to be opened, the method further comprises:
and when the number of the to-be-started outer machine modules is smaller than the maximum number, controlling each to-be-started outer machine module to operate according to the frequency limiting current and the frequency reducing current.
8. An air conditioner control device is characterized by being applied to a multi-split air conditioner; the air conditioning control device includes:
the acquisition module is used for acquiring the current limit of the multi-split air conditioner and the maximum protection current of each outer unit module;
the determining module is used for determining the maximum number of the outdoor unit modules to be started according to the maximum protection current and the electricity limiting current of each outdoor unit module if the sum of the maximum protection currents of all the outdoor unit modules is larger than the electricity limiting current;
the opening module is used for opening each to-be-opened outer machine module according to the maximum number of the to-be-opened outer machine modules;
and the control module is used for reducing preset frequency limiting current and frequency reducing current according to the maximum number of the to-be-started outer machine modules and the electricity limiting current when the number of the to-be-started outer machine modules is equal to the maximum number, obtaining corrected frequency limiting current and corrected frequency reducing current, and controlling each to-be-started outer machine module to operate according to the corrected frequency limiting current and the corrected frequency reducing current.
9. The multi-split air conditioner is characterized by comprising:
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 1-7.
10. A computer-readable storage medium on which a computer program is stored, the computer program, when being executed by a processor, implementing the air-conditioning control method according to any one of claims 1 to 7.
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