CN105588271B - Multi-compressor control method and device in a kind of multi-connected air conditioning system - Google Patents
Multi-compressor control method and device in a kind of multi-connected air conditioning system Download PDFInfo
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Abstract
The embodiment of the invention discloses multi-compressor control method and device in a kind of multi-connected air conditioning system, it is related to air-conditioning technical field, in the case where the power consumption for ensureing multi-connected air conditioning system is relatively low, to reduce the operand of multi-connected air conditioning system.This method includes：Determine it is N number of corresponding to N number of compressor currently can valid value；Determine that N number of currently can be in valid value M currently can valid value；Determine M currently can M compressor corresponding to valid value target operating frequency.This method can be used for being controlled multiple compressors in multi-connected air conditioning system, to reduce the power consumption of multi-connected air conditioning system.
Description
Technical field
The present invention relates to multi-compressor control method in air-conditioning technical field, more particularly to a kind of multi-connected air conditioning system and
Device.
Background technology
In multi-connected air conditioning system (hereinafter referred to as system), because multiple compressors, electric expansion valve and fan etc. exist
Do not operate under the state of a control of best of breed in most cases so that the operational efficiency of system is far below nominal value.Example
Such as, the system that a IPLV (Integrated Part Load Value, the comprehensive sub-load) coefficient of performance is nominally 5.4,
There was only 3.2 or so during actual motion, found in test, manually adjust frequency, the aperture of electric expansion valve of compressor
Or rotation speed of the fan, IPLV can be temporarily adjusted to 5.4.
In order to improve the operational efficiency of system, the power consumption of system is reduced, a kind of method is to calculate each compressor working as
Regulated quantity corresponding to all running frequencies under preceding condensation temperature and current evaporating temperature (regulated quantity refers to refrigerating capacity or heating capacity)
And performance number, the combination to all possible regulated quantity of all compressors are compared, and determine meet system requirements one
The combination of individual or multiple regulated quantitys, when the combination of multiple regulated quantitys is satisfied by system requirements, from the combination of the plurality of regulated quantity
In select the minimum combination of performance number, running frequency corresponding to the regulated quantity during this is combined be defined as corresponding to compressor mesh
Running frequency is marked, controls each compressor to be run with the target operating frequency of the compressor, being reached with this reduces system power dissipation
Purpose.Exemplary, when system includes 2 compressors, the running frequency scope of each compressor is 15Hz to 135Hz, then
Each compressor can run (including running frequency 0) operation with 122 frequencies, then can determine 122 × 122 kinds of combinations,
The combination of the regulated quantity that can meet system requirements and performance number minimum, the regulation during this is combined are selected from these combinations
Running frequency corresponding to amount is defined as the target operating frequency of corresponding compressor.Generally, the compression that system includes
More than 2 of the number of machine, the above method are computationally intensive it is determined that during the target operating frequency of compressor.
The content of the invention
Embodiments of the invention provide multi-compressor control method and device in a kind of multi-connected air conditioning system, to protect
Demonstrate,prove multi-connected air conditioning system power consumption it is relatively low in the case of, reduce the operand of multi-connected air conditioning system.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
First aspect, there is provided multi-compressor control method in a kind of multi-connected air conditioning system, the system include N number of compression
Machine, methods described include：
Determine corresponding to N number of compressor it is N number of currently can valid value, current highest energy efficiency corresponding to a compressor
Being worth can highest energy in valid value corresponding to all running frequencies under current condensation temperature and current evaporating temperature for the compressor
Valid value；
Determine N number of currently can be in valid value M currently can valid value, the M currently can valid value
Corresponding M regulated quantity sum currently can be in valid value not less than first threshold and the M any M-1 is current most
M-1 regulated quantity sum corresponding to high energy valid value is less than first threshold, and the first threshold is the most low-key of the system requirements
Section amount, the regulated quantity are refrigerating capacity or heating capacity；
Determine the M currently can M compressor corresponding to valid value target operating frequency；
Wherein, when the M regulated quantity sum is not more than Second Threshold, each compressor in the M compressor
Target operating frequency for currently can running frequency corresponding to valid value corresponding to the compressor；When the M regulated quantity it
During with more than Second Threshold, each compressor in the M-X compressor in addition to X compressor in the M compressor
Target operating frequency for corresponding to the compressor currently can running frequency corresponding to valid value, in the M compressor
When each compressor is run with the target operating frequency of the compressor, M-X corresponding to the M-X compressor currently can
The X regulated quantity sum corresponding with X target operating frequency of the X compressor of M-X regulated quantity corresponding to valid value is not small
In first threshold and no more than X performance number sum minimum corresponding to Second Threshold and the X target operating frequency；It is described
Second Threshold is the highest regulated quantity of the system requirements, and corresponding one an of running frequency can valid value, a regulated quantity and one
Individual performance number, 1≤M≤N, 1≤X≤M, N >=2, M, N and X are integer.
Second aspect, there is provided multi-compressor control device in a kind of multi-connected air conditioning system, the system include N number of compression
Machine, described device include：
First determining unit, for determine corresponding to N number of compressor it is N number of currently can valid value, a compressor
It is corresponding currently can valid value be that the compressor all running frequencies under current condensation temperature and current evaporating temperature are corresponding
Energy valid value in highest energy valid value；
Second determining unit, for determine N number of currently can be in valid value M currently can valid value, the M
It is individual currently can M regulated quantity sum corresponding to valid value currently can be in valid value not less than first threshold and the M
Any M-1 currently can M-1 regulated quantity sum corresponding to valid value be less than first threshold, the first threshold is the system
The minimum regulated quantity of system demand, the regulated quantity are refrigerating capacity or heating capacity；
3rd determining unit, for determine the M currently can M compressor corresponding to valid value object run frequently
Rate；
Wherein, when the M regulated quantity sum is not more than Second Threshold, each compressor in the M compressor
Target operating frequency for currently can running frequency corresponding to valid value corresponding to the compressor；When the M regulated quantity it
During with more than Second Threshold, each compressor in the M-X compressor in addition to X compressor in the M compressor
Target operating frequency for corresponding to the compressor currently can running frequency corresponding to valid value, in the M compressor
When each compressor is run with the target operating frequency of the compressor, M-X corresponding to the M-X compressor currently can
The X regulated quantity sum corresponding with X target operating frequency of the X compressor of M-X regulated quantity corresponding to valid value is not small
In first threshold and no more than X performance number sum minimum corresponding to Second Threshold and the X target operating frequency；It is described
Second Threshold is the highest regulated quantity of the system requirements, and corresponding one an of running frequency can valid value, a regulated quantity and one
Individual performance number, 1≤M≤N, 1≤X≤M, N >=2, M, N and X are integer.
Method and device provided in an embodiment of the present invention, it is first determined the N number of compressor pair in multi-connected air conditioning system
Answer it is N number of can valid value, according to it is N number of can the regulated quantity of regulated quantity and multi-connected air conditioning system demand corresponding to valid value
It is determined that the running frequency of each compressor.When N number of M that can be in valid value can M regulated quantity sum corresponding to valid value
, can be directly by the object run of each compressor in M compressor when meeting the regulated quantity of multi-connected air conditioning system demand
Frequency is defined as can running frequency corresponding to valid value corresponding to the compressor；When M regulated quantity sum is more than multiple air conditioner
During the regulated quantity of adjusting system demand, in order to reduce unnecessary power consumption, can by for X compressor in M compressor it is true
Set the goal running frequency so that each compressor in M compressor meets when being run with the target operating frequency of the compressor
Cause that the operation power consumption of X compressor is minimum on the premise of the regulated quantity of multi-connected air conditioning system demand；Because energy valid value is higher
When, the operating efficiency of compressor is higher, therefore, when each compressor is run with the target operating frequency of the compressor, is protecting
Demonstrate,prove multi-connected air conditioning system power consumption it is relatively low on the premise of, can greatly reduce controller operand (X set it is smaller, control
The operand of device processed is smaller), therefore can be widely used.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the flow chart of multi-compressor control method in a kind of multi-connected air conditioning system provided in an embodiment of the present invention；
Fig. 2 is the flow of multi-compressor control method in another multi-connected air conditioning system provided in an embodiment of the present invention
Figure；
Fig. 3 is the structural representation of multi-compressor control device in a kind of multi-connected air conditioning system provided in an embodiment of the present invention
Figure；
Fig. 4 is that the structure of multi-compressor control device in another multi-connected air conditioning system provided in an embodiment of the present invention is shown
It is intended to.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Embodiment one
The embodiment of the present invention provides multi-compressor control method in a kind of multi-connected air conditioning system, and the system includes N number of
Compressor, as shown in figure 1, methods described includes：
101st, determine corresponding to N number of compressor it is N number of currently can valid value, current highest energy efficiency corresponding to a compressor
Being worth can highest energy in valid value corresponding to all running frequencies under current condensation temperature and current evaporating temperature for the compressor
Valid value.
Executive agent in the embodiment of the present invention can be controller, and controller can periodically perform implementation of the present invention
The method that example provides.
It should be noted that in synchronization, the current condensation temperature and current evaporating temperature of different compressors can
Can be identical, it is also possible to different.Each compressor is under current condensation temperature and current evaporating temperature, all each correspondences of running frequency
One can valid value, the compressor currently can valid value refer under current condensation temperature and current evaporating temperature, Suo Youyun
Highest energy valid value in energy valid value corresponding to line frequency.Corresponding one of one compressor can valid value.
As shown in table 1, what the embodiment of the present invention was exemplary shows a compressor in different condensation temperature and difference
Evaporating temperature under can valid value (be indicated in table by E, by E subscript in different condensation temperatures and not
With evaporating temperature under can valid value make a distinction).
Table 1
By taking table 1 as an example, when the running frequency scope of the compressor is 15Hz~135Hz, the compressor can be with 121
Frequency is run, the corresponding energy valid value of a running frequency, when the current condensation temperature of the compressor and current evaporating temperature point
When Wei not be -15 DEG C and 40 DEG C, E0Refer to when the condensation temperature of the compressor and evaporating temperature are respectively -15 DEG C and 40 DEG C 121
Highest energy valid value in 121 energy valid value corresponding to running frequency.It should be noted that when compressor is not run, compressor
Running frequency be 0, " all running frequencies " in the embodiment of the present invention does not include running frequency 0.
The energy valid value of one compressor refers to the ratio of refrigeration (heat) amount and refrigeration (heat) power, and therefore, one can valid value
A corresponding refrigeration (heat) amount and refrigeration (heat) power.
Specifically, compressor efficiency corresponding to each running frequency under specific condensation temperature and specific evaporating temperature
The fan-out capability table and input power table that value can provide according to compressor producer are calculated using interpolation calculation method.
102nd, determine N number of currently can be in valid value M currently can valid value, M currently can valid value it is corresponding
M regulated quantity sum currently can be in valid value not less than first threshold and M any M-1 currently can valid value
Corresponding M-1 regulated quantity sum is less than first threshold, and first threshold is the minimum regulated quantity of system requirements, and regulated quantity is refrigeration
Amount or heating capacity.
Wherein, M currently can valid value can be N number of any M current highest energy efficiency that currently can be in valid value
Value.
It should be noted that generally, refrigeration (heat) amounts of system requirements is a scope, the system that compressor provides
Cold (heat) amount is preferably located within the scope of this.Refrigeration (heat) amount sum it can currently be needed when M corresponding to valid value more than system
During minimum refrigeration (heat) amount asked, illustrate that refrigeration (heat) amount that M compressor provides can meet system requirements.
103rd, determine M currently can M compressor corresponding to valid value target operating frequency.
Wherein, when M regulated quantity sum is not more than Second Threshold, the target fortune of each compressor in M compressor
Line frequency is currently can running frequency corresponding to valid value corresponding to the compressor；When M regulated quantity sum is more than the second threshold
During value, the target operating frequency of each compressor in the M-X compressor in addition to X compressor in M compressor is
Corresponding to the compressor currently can running frequency corresponding to valid value, each compressor in M compressor is with the compressor
Target operating frequency operation when, M-X corresponding to M-X compressor is individual currently can M-X regulated quantity and X corresponding to valid value
X regulated quantity sum corresponding to X target operating frequency of individual compressor not less than first threshold and no more than Second Threshold and
X performance number sum is minimum corresponding to X target operating frequency；Second Threshold is the highest regulated quantity of system requirements, and one is transported
The corresponding energy valid value of line frequency, a regulated quantity and a performance number, 1≤M≤N, 1≤X≤M, N >=2, M, N and X are whole
Number.
It should be noted that due to can valid value it is higher when, refrigeration (heat) efficiency of compressor is higher, thus when M currently
Can be when refrigeration (heat) amount sum be measured no more than the highest refrigeration (heat) of system requirements corresponding to valid value, in M compressor
Each compressor currently corresponding to valid value during operational efficiency operation, can cause the system of the M compressor with corresponding
Cold (heat) efficiency is higher, so that refrigeration (heat) efficiency of multi-connected air conditioning system is higher.
Refrigeration (heat) amount sum it can currently be measured when M is individual corresponding to valid value more than the highest refrigeration (heat) of system requirements
When, in order to reduce unnecessary power consumption, on the premise of the refrigeration (heat) for meeting system requirements is measured, can try one's best reduction system
Power consumption.Specifically, in order to reduce the power consumption of system, the target operating frequency of X compressor can be determined by the following method：
Each compressor in X compressor all running frequencies under current condensation temperature and current evaporating temperature
Corresponding regulated quantity determines R regulated quantity combination；Wherein, each regulated quantity combination includes X regulated quantity, a regulated quantity pair
A compressor is answered, the regulated quantity is that the compressor some running frequency under current condensation temperature and current evaporating temperature is corresponding
Regulated quantity, R is the product of the number of all running frequencies of X compressor；
Determine r the first regulated quantity combinations in R regulated quantity combination；Wherein, X regulation in the combination of the first regulated quantity
Amount and M-X can the corresponding M-X regulated quantity sum of valid value be not less than first threshold and be not more than Second Threshold, 1≤r≤
R, r, R are integer；
Determine the second regulated quantity combination in r the first regulated quantity combinations；Wherein, the second regulated quantity is combined as r first
The regulated quantity combination of performance number minimum in regulated quantity combination, the performance number of a regulated quantity combination refer in regulated quantity combination
X regulated quantity corresponding to X performance number sum corresponding to X running frequency, the corresponding regulated quantity of running frequency and
One performance number；
Determine the target operating frequency of each compressor in X compressor in the combination of the second regulated quantity with the compression
Running frequency corresponding to regulated quantity corresponding to machine.
The specific example of this method can be found in discussed below.
After step 103, the above method can also include：Controller control each compressor in N number of compressor with
The target operating frequency operation of the compressor.
It should be noted that the target operating frequency of the compressor of other in addition to M compressor in N number of compressor is
0。
Optionally, M currently can valid value be preceding M in target sequence currently can valid value, any M-1 are worked as
Before can valid value be preceding M-1 in target sequence currently can valid value, target sequence be by it is N number of currently can valid value
According to the sequence obtained after order arrangement from large to small.
Due to can valid value it is higher when, refrigeration (heat) efficiency of compressor is higher, it is preferred, therefore, that can cause M currently
Can valid value for M before N number of value highest that currently can be in valid value currently can valid value, multiple air conditioner can be caused
Refrigeration (heat) efficiency of adjusting system further improves.
Optionally, by it is N number of currently can valid value according to from large to small tactic during, if N number of current
When can have multiple identical values in valid value, by the pressure that the accumulated running time of compressor corresponding to multiple identical values is short
Corresponding to contracting machine currently can valid value arrangement it is forward.
It is exemplary, if multi-connected air conditioning system includes 6 compressors, 6 compressors currently can valid value point
Not Wei E (0), E (1), E (2), E (3), E (4) and E (5), wherein, the number of the digitized representation compressor in E unquotes.Assuming that
Wherein E (3)=E (4), 6 can the magnitude relationship of valid value be：E (5) ＞ E (2) ＞ E (3)=E (4) ＞ E (0) ＞ E (1).
Wherein, the accumulated running time of No. 3 compressor is 80 hours, and the accumulated running time of No. 4 compressor is 65 hours, the feelings
Under condition, target sequence can be：E(5)—E(2)—E(4)—E(3)—E(0)—E(1).
In this case, due to the method that is provided in the embodiment of the present invention preferentially unlatching value it is larger can be corresponding to valid value
Compressor, therefore, using the optional method to it is N number of can after valid value is ranked up, can balanced each compressor fortune
Row loss.
It should be noted that in order to reduce the operand of controller, generally, X value is less than or equal to 2.
Optionally, as X=1, X compressor is that the m-th in target sequence can currently be compressed corresponding to valid value
Machine.
It is determined that m-th currently can the target operating frequency of compressor corresponding to valid value when, may have multiple operations
Refrigeration (heat) amount corresponding to frequency and preceding M-1 in target sequence currently can corresponding freeze (heat) of valid value measure sum not
Less than first threshold and it is not more than Second Threshold, in this case, the corresponding performance number in the plurality of running frequency is minimum
Running frequency is defined as the target operating frequency of the compressor.The optional method so that preceding M-1 in target sequence are current
Can compressor corresponding to valid value with it is corresponding currently can corresponding to valid value running frequency run when, can reach most
High energy valid value, therefore, it can significantly reduce the power consumption of system.
It is exemplary, if m-th currently can compressor corresponding to valid value in current condensation temperature and when front evaporator temperature
Spend in 121 refrigeration (heat) amounts corresponding to lower 121 running frequencies, there are 5 refrigeration (heat) amounts to work as with preceding M-1 in target sequence
Before refrigeration (heat) amount sum can be not less than first threshold and be not more than Second Threshold corresponding to valid value, in this case, by 5
The running frequency of corresponding performance number minimum in 5 running frequencies corresponding to refrigeration (heat) amount is defined as the target of the compressor
Running frequency.
Optionally, when M >=2 and X=2, X compressor currently can valid value pair for M-1 in target sequence
M-th in the compressor and target sequence answered currently can compressor corresponding to valid value.
The optional method so that preceding M-2 in target sequence currently can compressor corresponding to valid value with right
That answers currently corresponding to valid value during running frequency operation, can reach highest energy valid value, therefore, can significantly drop
The power consumption of low system.
It is exemplary, describe for convenience, hereinafter by M-1 currently can compressor corresponding to valid value be referred to as the
M-1 compressor, by m-th currently can compressor corresponding to valid value be referred to as m-th compressor, with the M-1 compressor
Number with all running frequencies of m-th compressor is to determine M-1 compressor and m-th compressor exemplified by 121
The process of target operating frequency can be：R=121 × 121 regulated quantity combination is determined, each regulated quantity combination includes 2
Regulated quantity, respectively the M-1 compressor tune corresponding to some running frequency under current condensation temperature and current evaporating temperature
Section amount and m-th the compressor regulated quantity corresponding to some running frequency under current condensation temperature and current evaporating temperature；In R=
R the first regulated quantity combinations, 2 regulated quantitys and target in the combination of the first regulated quantity are selected in 121 × 121 regulated quantity combinations
Preceding M-2 in sequence M-2 regulated quantity sum not less than first threshold and can be not more than Second Threshold corresponding to valid value；
Determine that the second regulated quantity combines in r the first regulated quantity combinations, the second regulated quantity is combined as in r the first regulated quantity combinations
The minimum regulated quantity combination of performance number, the performance number of a regulated quantity combination refers to 2 regulated quantitys in regulated quantity combination
2 performance number sums corresponding to corresponding 2 running frequencies, a corresponding regulated quantity of running frequency and a performance number；
The target operating frequency for determining the M-1 compressor is the regulation corresponding with the M-1 compressor in the combination of the second regulated quantity
Running frequency corresponding to amount, the target operating frequency for determining m-th compressor are being compressed with m-th in the combination of the second regulated quantity
Running frequency corresponding to regulated quantity corresponding to machine.
Method provided in an embodiment of the present invention, it is first determined N number of corresponding to the N number of compressor in multi-connected air conditioning system
Can valid value, according to it is N number of can the regulated quantity of regulated quantity and multi-connected air conditioning system demand corresponding to valid value determine it is every
The running frequency of individual compressor.When N number of M that can be in valid value can M regulated quantity sum satisfaction corresponding to valid value it is more
, can be directly true by the target operating frequency of each compressor in M compressor during the regulated quantity of connection formula air-conditioning system demand
Being set to corresponding to the compressor can running frequency corresponding to valid value；When M regulated quantity sum is more than multi-connected air conditioning system
, can be by determining target for X compressor in M compressor in order to reduce unnecessary power consumption during the regulated quantity of demand
Running frequency so that each compressor in M compressor meets multiple when being run with the target operating frequency of the compressor
Cause that the operation power consumption of X compressor is minimum on the premise of the regulated quantity of air-conditioning system demand；Due to can valid value it is higher when, compression
The operating efficiency of machine is higher, therefore, when each compressor is run with the target operating frequency of the compressor, is ensureing multiple
On the premise of the power consumption of air-conditioning system is relatively low, can greatly reducing the operand of controller, (X sets smaller, the fortune of controller
Calculation amount is smaller), therefore can be widely used.
Embodiment two
Multi-compressor control method is further shown in the multi-connected air conditioning system that the embodiment is provided embodiment one
Example property explanation, as shown in Fig. 2 this method specifically includes：
201st, determine it is N number of corresponding to N number of compressor currently can valid value.
When performing this method first, before step 201, this method can also include：Compressor in acquisition system
Number.
Wherein, corresponding one an of compressor currently can valid value.Specifically, controller can exist N number of compressor
Under different condensation temperatures and evaporating temperature can valid value be stored in memory, when it needs to be determined that N number of compressor is corresponding
Currently can valid value when, search obtain in memory according to the current condensation temperature of each compressor and current evaporating temperature
Take each compressor currently can valid value.
Relevant explanation in the embodiment of the present invention can be found in above-described embodiment.
202nd, by it is N number of currently can valid value arranged to obtain target sequence according to order from large to small.
Wherein, it is if N number of when currently can have multiple identical values in valid value, will compression corresponding to multiple identical values
Corresponding to accumulated running time of machine short compressor currently can valid value arrangement it is forward.
It is exemplary, if multi-connected air conditioning system includes 6 compressors, 6 compressors currently can valid value point
Not Wei E (0), E (1), E (2), E (3), E (4) and E (5), wherein, the number of the digitized representation compressor in E unquotes.Assuming that
Wherein E (3)=E (4), 6 can the magnitude relationship of valid value be：E (5) ＞ E (2) ＞ E (3)=E (4) ＞ E (0) ＞ E (1).
Wherein, the accumulated running time of No. 3 compressor is 80 hours, and the accumulated running time of No. 4 compressor is 65 hours, the feelings
Under condition, target sequence can be：E(5)—E(2)—E(4)—E(3)—E(0)—E(1).
203rd, judge whether the preceding M in target sequence refrigeration (heat) amount sum can currently be not less than corresponding to valid value
Minimum refrigeration (heat) amount of system requirements.
Wherein, M initial value is that 1, M is integer.
If it is not, perform step 204；If so, perform step 205.
204th, M=M+1 is made.
After performing step 204, return to step 203.
205th, judge whether the preceding M in target sequence refrigeration (heat) amount sum can currently be not more than corresponding to valid value
Highest refrigeration (heat) amount of system requirements.
If so, perform step 206；If it is not, perform step 207.
206th, determine preceding M in target sequence currently can be in valid value each can currently be pressed corresponding to valid value
The target operating frequency of contracting machine is running frequency corresponding to the current highest energy efficiency value.
It is exemplary, the 1st currently can the target operating frequency of compressor corresponding to valid value be the 1st current highest
Can running frequency corresponding to valid value.
Step 208 is performed after performing step 206.
207th, preceding M-1 in target sequence each pressures that currently can be in M-1 compressor corresponding to valid value are determined
The target operating frequency of contracting machine be corresponding to the compressor can running frequency corresponding to valid value, determine the in target sequence
M currently can compressor corresponding to valid value target operating frequency.
Specifically, m-th currently can compressor corresponding to valid value be X compressor described in embodiment one, really
Determine m-th currently the method for the target operating frequency of compressor can be found in above-described embodiment corresponding to valid value, herein not
Repeat again.
Step 208 is performed after performing step 207.
208th, each compressor in N number of compressor is controlled to be run with the target operating frequency of the compressor.
It should be noted that the target operating frequency of the compressor of other in addition to M compressor in N number of compressor is
0, M compressor refer to preceding M in target sequence currently can M compressor corresponding to valid value.
In addition, in order to ensure that system is in the relatively low state of power consumption all the time, controller can perform every preset time period
This method, or periodically perform this method.
Method provided in an embodiment of the present invention, it is first determined N number of corresponding to the N number of compressor in multi-connected air conditioning system
Can valid value, according to it is N number of can the regulated quantity of regulated quantity and multi-connected air conditioning system demand corresponding to valid value determine it is every
The running frequency of individual compressor.When N number of M that can be in valid value can M regulated quantity sum satisfaction corresponding to valid value it is more
, can be directly true by the target operating frequency of each compressor in M compressor during the regulated quantity of connection formula air-conditioning system demand
Being set to corresponding to the compressor can running frequency corresponding to valid value；When M regulated quantity sum is more than multi-connected air conditioning system
, can be by determining target for X compressor in M compressor in order to reduce unnecessary power consumption during the regulated quantity of demand
Running frequency so that each compressor in M compressor meets multiple when being run with the target operating frequency of the compressor
Cause that the operation power consumption of X compressor is minimum on the premise of the regulated quantity of air-conditioning system demand；Due to can valid value it is higher when, compression
The operating efficiency of machine is higher, therefore, when each compressor is run with the target operating frequency of the compressor, is ensureing multiple
On the premise of the power consumption of air-conditioning system is relatively low, can greatly reducing the operand of controller, (X sets smaller, the fortune of controller
Calculation amount is smaller), therefore can be widely used.
Embodiment three
The embodiments of the invention provide multi-compressor control device 30 in a kind of multi-connected air conditioning system, for performing Fig. 1
Shown method, as shown in figure 3, device 30 includes：
First determining unit 301, for determine corresponding to N number of compressor it is N number of currently can valid value, a compressor pair
Answer currently can valid value be the compressor under current condensation temperature and current evaporating temperature corresponding to all running frequencies
Highest energy valid value in energy valid value；
Second determining unit 302, for determine N number of currently can be in valid value M currently can valid value, M are worked as
Before can M regulated quantity sum corresponding to valid value currently can be in valid value not less than first threshold and M any M-1
It is individual currently can M-1 regulated quantity sum corresponding to valid value be less than first threshold, first threshold is the most low-key of system requirements
Section amount, regulated quantity are refrigerating capacity or heating capacity；
3rd determining unit 303, for determine M currently can M compressor corresponding to valid value object run frequently
Rate；
Wherein, when M regulated quantity sum is not more than Second Threshold, the target fortune of each compressor in M compressor
Line frequency is currently can running frequency corresponding to valid value corresponding to the compressor；When M regulated quantity sum is more than the second threshold
During value, the target operating frequency of each compressor in the M-X compressor in addition to X compressor in M compressor is
Corresponding to the compressor currently can running frequency corresponding to valid value, each compressor in M compressor is with the compressor
Target operating frequency operation when, M-X corresponding to M-X compressor is individual currently can M-X regulated quantity and X corresponding to valid value
X regulated quantity sum corresponding to X target operating frequency of individual compressor not less than first threshold and no more than Second Threshold and
X performance number sum is minimum corresponding to X target operating frequency；Second Threshold is the highest regulated quantity of system requirements, and one is transported
The corresponding energy valid value of line frequency, a regulated quantity and a performance number, 1≤M≤N, 1≤X≤M, N >=2, M, N and X are whole
Number.
Optionally, M currently can valid value be preceding M in target sequence currently can valid value, any M-1 are worked as
Before can valid value be preceding M-1 in target sequence currently can valid value, target sequence be by it is N number of currently can valid value
According to the sequence obtained after order arrangement from large to small.
Optionally, by it is N number of currently can valid value according to from large to small tactic during, if N number of current
When can have multiple identical values in valid value, by the pressure that the accumulated running time of compressor corresponding to multiple identical values is short
Corresponding to contracting machine currently can valid value arrangement it is forward.
Optionally, as X=1, X compressor is that the m-th in target sequence can currently be compressed corresponding to valid value
Machine.
Optionally, when M >=2 and X=2, X compressor currently can valid value pair for M-1 in target sequence
M-th in the compressor and target sequence answered currently can compressor corresponding to valid value.
Device provided in an embodiment of the present invention, it is first determined N number of corresponding to the N number of compressor in multi-connected air conditioning system
Can valid value, according to it is N number of can the regulated quantity of regulated quantity and multi-connected air conditioning system demand corresponding to valid value determine it is every
The running frequency of individual compressor.When N number of M that can be in valid value can M regulated quantity sum satisfaction corresponding to valid value it is more
, can be directly true by the target operating frequency of each compressor in M compressor during the regulated quantity of connection formula air-conditioning system demand
Being set to corresponding to the compressor can running frequency corresponding to valid value；When M regulated quantity sum is more than multi-connected air conditioning system
, can be by determining target for X compressor in M compressor in order to reduce unnecessary power consumption during the regulated quantity of demand
Running frequency so that each compressor in M compressor meets multiple when being run with the target operating frequency of the compressor
Cause that the operation power consumption of X compressor is minimum on the premise of the regulated quantity of air-conditioning system demand；Due to can valid value it is higher when, compression
The operating efficiency of machine is higher, therefore, when each compressor is run with the target operating frequency of the compressor, is ensureing multiple
On the premise of the power consumption of air-conditioning system is relatively low, can greatly reducing the operand of controller, (X sets smaller, the fortune of controller
Calculation amount is smaller), therefore can be widely used.
Example IV
In hardware realization, the unit in said apparatus 30 can be embedded in or independently of device 30 in the form of hardware
Processor in, can also be stored in a software form in the memory of device 30, in order to processor call perform more than it is each
Operated corresponding to individual unit, the processor can be CPU (CPU), microprocessor, single-chip microcomputer etc..
As shown in figure 4, the embodiment of the present invention provides multi-compressor control device 40 in another multi-connected air conditioning system, use
In performing the method shown in Fig. 1, the device 40 includes：Memory 401, processor 402 and bus system 403.
Wherein, it is coupled between memory 401 and processor 402 by bus system 403, wherein memory
401 may include random access memory, it is also possible to also including nonvolatile memory, for example, at least a magnetic disk storage.
Bus system 403, can be isa bus, pci bus or eisa bus etc..The bus system 403 can be divided into address bus,
Data/address bus, controlling bus etc..Only represented for ease of representing, in Fig. 4 with a thick line, it is not intended that an only bus or
A type of bus.
Memory 401 is used to store one group of code, and the code performs following action for control processor 402：
Determine corresponding to N number of compressor it is N number of currently can valid value, corresponding to a compressor currently can valid value be
The compressor can highest energy valid value in valid value corresponding to all running frequencies under current condensation temperature and current evaporating temperature；
Determine N number of currently can be in valid value M currently can valid value, M currently can be M corresponding to valid value
Regulated quantity sum currently can be in valid value not less than first threshold and M any M-1 currently can be corresponding to valid value
M-1 regulated quantity sum is less than first threshold, and first threshold is the minimum regulated quantity of system requirements, and regulated quantity is refrigerating capacity or system
Heat；
Determine M currently can M compressor corresponding to valid value target operating frequency；
Wherein, when M regulated quantity sum is not more than Second Threshold, the target fortune of each compressor in M compressor
Line frequency is currently can running frequency corresponding to valid value corresponding to the compressor；When M regulated quantity sum is more than the second threshold
During value, the target operating frequency of each compressor in the M-X compressor in addition to X compressor in M compressor is
Corresponding to the compressor currently can running frequency corresponding to valid value, each compressor in M compressor is with the compressor
Target operating frequency operation when, M-X corresponding to M-X compressor is individual currently can M-X regulated quantity and X corresponding to valid value
X regulated quantity sum corresponding to X target operating frequency of individual compressor not less than first threshold and no more than Second Threshold and
X performance number sum is minimum corresponding to X target operating frequency；Second Threshold is the highest regulated quantity of system requirements, and one is transported
The corresponding energy valid value of line frequency, a regulated quantity and a performance number, 1≤M≤N, 1≤X≤M, N >=2, M, N and X are whole
Number.
Optionally, M currently can valid value be preceding M in target sequence currently can valid value, any M-1 are worked as
Before can valid value be preceding M-1 in target sequence currently can valid value, target sequence be by it is N number of currently can valid value
According to the sequence obtained after order arrangement from large to small.
Optionally, by it is N number of currently can valid value according to from large to small tactic during, if N number of current
When can have multiple identical values in valid value, by the pressure that the accumulated running time of compressor corresponding to multiple identical values is short
Corresponding to contracting machine currently can valid value arrangement it is forward.
Optionally, as X=1, X compressor is that the m-th in target sequence can currently be compressed corresponding to valid value
Machine.
Optionally, when M >=2 and X=2, X compressor currently can valid value pair for M-1 in target sequence
M-th in the compressor and target sequence answered currently can compressor corresponding to valid value.
Device provided in an embodiment of the present invention, it is first determined N number of corresponding to the N number of compressor in multi-connected air conditioning system
Can valid value, according to it is N number of can the regulated quantity of regulated quantity and multi-connected air conditioning system demand corresponding to valid value determine it is every
The running frequency of individual compressor.When N number of M that can be in valid value can M regulated quantity sum satisfaction corresponding to valid value it is more
, can be directly true by the target operating frequency of each compressor in M compressor during the regulated quantity of connection formula air-conditioning system demand
Being set to corresponding to the compressor can running frequency corresponding to valid value；When M regulated quantity sum is more than multi-connected air conditioning system
, can be by determining target for X compressor in M compressor in order to reduce unnecessary power consumption during the regulated quantity of demand
Running frequency so that each compressor in M compressor meets multiple when being run with the target operating frequency of the compressor
Cause that the operation power consumption of X compressor is minimum on the premise of the regulated quantity of air-conditioning system demand；Due to can valid value it is higher when, compression
The operating efficiency of machine is higher, therefore, when each compressor is run with the target operating frequency of the compressor, is ensureing multiple
On the premise of the power consumption of air-conditioning system is relatively low, can greatly reducing the operand of controller, (X sets smaller, the fortune of controller
Calculation amount is smaller), therefore can be widely used.
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function
The division progress of module, can be as needed and by above-mentioned function distribution by different function moulds for example, in practical application
Block is completed, i.e., the internal structure of device is divided into different functional modules, to complete all or part of work(described above
Energy.The device of foregoing description and the specific work process of module, may be referred to the corresponding process in preceding method embodiment, herein
Repeat no more.
In several embodiments provided herein, it should be understood that disclosed apparatus and method, it can be passed through
Its mode is realized.For example, device embodiment described above is only schematical, for example, the division of the module, only
Only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple module or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or discussed
Mutual coupling or direct-coupling or communication connection can be the INDIRECT COUPLINGs or logical by some interfaces, device or unit
Letter connection.
In addition, each functional module in each embodiment of the application can be integrated in a processing module, can also
That modules are individually physically present, can also two or more modules be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, can also be realized in the form of software function module.
Described above, above example is only to illustrate the technical scheme of the application, rather than its limitations；Although with reference to before
Embodiment is stated the application is described in detail, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of each embodiment technical scheme of the application.
Claims (10)
1. multi-compressor control method in a kind of multi-connected air conditioning system, the system includes N number of compressor, it is characterised in that
Methods described includes：
Determine corresponding to N number of compressor it is N number of currently can valid value, corresponding to a compressor currently can valid value be
The compressor can highest energy valid value in valid value corresponding to all running frequencies under current condensation temperature and current evaporating temperature；
Determine N number of currently can be in valid value M currently can valid value, the M currently can valid value it is corresponding
M regulated quantity sum currently can be in valid value not less than first threshold and the M any M-1 currently can
M-1 regulated quantity sum corresponding to valid value is less than first threshold, and the first threshold is the minimum regulated quantity of the system requirements,
The regulated quantity is refrigerating capacity or heating capacity；
Determine the M currently can M compressor corresponding to valid value target operating frequency；
Wherein, when the M regulated quantity sum is not more than Second Threshold, the mesh of each compressor in the M compressor
Marking running frequency currently can running frequency corresponding to valid value corresponding to the compressor；When the M regulated quantity sum is big
When Second Threshold, the mesh of each compressor in the M-X compressor in addition to X compressor in the M compressor
Mark running frequency be corresponding to the compressor currently can running frequency corresponding to valid value, it is each in the M compressor
When compressor is run with the target operating frequency of the compressor, M-X corresponding to the M-X compressor currently can valid value
Corresponding M-X regulated quantity X regulated quantity sum corresponding with X target operating frequency of the X compressor is not less than the
One threshold value and no more than X performance number sum minimum corresponding to Second Threshold and the X target operating frequency；Described second
Threshold value is the highest regulated quantity of the system requirements, and corresponding one an of running frequency can valid value, a regulated quantity and a work(
Rate value, 1≤M≤N, 1≤X≤M, N >=2, M, N and X are integer.
2. according to the method for claim 1, it is characterised in that the M currently can valid value be in target sequence
Preceding M currently can valid value, described any M-1 currently can valid value be preceding M-1 in the target sequence current
Can valid value, the target sequence be by it is described it is N number of currently can valid value according to from large to small order arrangement after obtain
Sequence.
3. according to the method for claim 2, it is characterised in that by it is described it is N number of currently can valid value according to by greatly extremely
It is small it is tactic during, if described N number of when currently can have multiple identical values in valid value, by the multiple phase
With value corresponding to compressor accumulated running time short compressor corresponding to currently can valid value arrangement it is forward.
4. according to the method in claim 2 or 3, it is characterised in that as X=1, the X compressor is the target
M-th in sequence currently can compressor corresponding to valid value.
5. according to the method in claim 2 or 3, it is characterised in that when M >=2 and X=2, the X compressor is institute
It is current most to state M-1 in target sequence m-ths that currently can be in compressor and the target sequence corresponding to valid value
Compressor corresponding to high energy valid value.
6. multi-compressor control device in a kind of multi-connected air conditioning system, the system includes N number of compressor, it is characterised in that
Described device includes：
First determining unit, for determine corresponding to N number of compressor it is N number of currently can valid value, compressor is corresponding
Currently can valid value be compressor energy corresponding to all running frequencies under current condensation temperature and current evaporating temperature
Highest energy valid value in valid value；
Second determining unit, for determine N number of currently can be in valid value M currently can valid value, the M are worked as
Before can M regulated quantity sum corresponding to valid value currently can be in valid value not less than first threshold and the M it is any
M-1 currently can M-1 regulated quantity sum corresponding to valid value be less than first threshold, the first threshold is system need
The minimum regulated quantity asked, the regulated quantity are refrigerating capacity or heating capacity；
3rd determining unit, for determine the M currently can M compressor corresponding to valid value target operating frequency；
Wherein, when the M regulated quantity sum is not more than Second Threshold, the mesh of each compressor in the M compressor
Marking running frequency currently can running frequency corresponding to valid value corresponding to the compressor；When the M regulated quantity sum is big
When Second Threshold, the mesh of each compressor in the M-X compressor in addition to X compressor in the M compressor
Mark running frequency be corresponding to the compressor currently can running frequency corresponding to valid value, it is each in the M compressor
When compressor is run with the target operating frequency of the compressor, M-X corresponding to the M-X compressor currently can valid value
Corresponding M-X regulated quantity X regulated quantity sum corresponding with X target operating frequency of the X compressor is not less than the
One threshold value and no more than X performance number sum minimum corresponding to Second Threshold and the X target operating frequency；Described second
Threshold value is the highest regulated quantity of the system requirements, and corresponding one an of running frequency can valid value, a regulated quantity and a work(
Rate value, 1≤M≤N, 1≤X≤M, N >=2, M, N and X are integer.
7. device according to claim 6, it is characterised in that the M currently can valid value be in target sequence
Preceding M currently can valid value, described any M-1 currently can valid value be preceding M-1 in the target sequence current
Can valid value, the target sequence be by it is described it is N number of currently can valid value according to from large to small order arrangement after obtain
Sequence.
8. device according to claim 7, it is characterised in that by it is described it is N number of currently can valid value according to by greatly extremely
It is small it is tactic during, if described N number of when currently can have multiple identical values in valid value, by the multiple phase
With value corresponding to compressor accumulated running time short compressor corresponding to currently can valid value arrangement it is forward.
9. the device according to claim 7 or 8, it is characterised in that as X=1, the X compressor is the target
M-th in sequence currently can compressor corresponding to valid value.
10. the device according to claim 7 or 8, it is characterised in that when M >=2 and X=2, the X compressor is institute
It is current most to state M-1 in target sequence m-ths that currently can be in compressor and the target sequence corresponding to valid value
Compressor corresponding to high energy valid value.
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| CN106871379B (en) * | 2017-03-30 | 2019-12-03 | 广东美的暖通设备有限公司 | Air-conditioning system and its compressor control method and device |
| CN106940075B (en) * | 2017-05-15 | 2019-05-07 | 特灵空调***(中国)有限公司 | Condenser of central air conditioner blower fan control system based on the autonomous optimizing of efficiency |
| CN108613327B (en) * | 2018-03-30 | 2019-10-08 | 珠海格力电器股份有限公司 | Combined alternate operation method and device of outdoor unit and multi-split system |
| CN109237709B (en) * | 2018-08-31 | 2020-12-08 | 青岛海尔空调电子有限公司 | Multi-split control method |
| CN109579230B (en) * | 2018-11-16 | 2021-01-08 | 青岛海信日立空调***有限公司 | Compressor frequency distribution method and device |
| CN109855192B (en) * | 2019-03-06 | 2021-05-25 | 杭州享福多智能科技有限公司 | Air conditioner with outer unit regulated and controlled in grading mode |
| CN112361684B (en) * | 2020-11-30 | 2021-09-07 | 珠海格力电器股份有限公司 | Control method and device for two-stage variable frequency compression refrigeration system and air conditioning unit |
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