CN107255350A - The energy-saving control method and device of multiple on-line system, multiple on-line system - Google Patents
The energy-saving control method and device of multiple on-line system, multiple on-line system Download PDFInfo
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- CN107255350A CN107255350A CN201710509114.2A CN201710509114A CN107255350A CN 107255350 A CN107255350 A CN 107255350A CN 201710509114 A CN201710509114 A CN 201710509114A CN 107255350 A CN107255350 A CN 107255350A
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Abstract
The invention discloses the energy-saving control method and device of a kind of multiple on-line system, multiple on-line system, the multiple on-line system includes outdoor unit and multiple indoor sets, wherein, the outdoor unit includes many frequency-changeable compressors in parallel, and the energy-saving control method comprises the following steps：When the multiple on-line system is under partial load condition, the demand frequency of the multiple on-line system is obtained；Demand frequency to the multiple on-line system judges, and control the number of units that the frequency-changeable compressor is opened to improve the efficiency of the multiple on-line system according to judged result, thus when multiple on-line system is under partial load condition, the number of units that can be opened according to the demand FREQUENCY CONTROL frequency-changeable compressor of multiple on-line system, so as to improve the efficiency of multiple on-line system, the effectively save energy, lifts the experience of user.
Description
Technical field
The present invention relates to air conditioner technical field, more particularly to a kind of energy-saving control method of multiple on-line system, Yi Zhongfei
Provisional computer-readable recording medium, a kind of energy-saving control device of multiple on-line system and a kind of multiple on-line system.
Background technology
As people require more and more higher to the comfortableness of environment temperature, multi-online air-conditioning system is widely used.In phase
In the technology of pass, the compressor control of multi-online air-conditioning system is that can not meet each indoor set in the compressor currently opened mostly
Next compressor is opened during existing demand.But, the problem of it is present be, without effective Energy Saving Control, efficiency compared with
It is low.
The content of the invention
It is contemplated that at least solving one of technical problem in above-mentioned technology to a certain extent.Therefore, the present invention
One purpose is to propose a kind of energy-saving control method of multiple on-line system, it is possible to increase the efficiency of multiple on-line system, effectively section
The about energy.
Second object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.The 3rd of the present invention
Individual purpose is to propose a kind of energy-saving control device of multiple on-line system.Fourth object of the present invention is to propose that one kind is multi-joint
Machine system.
To reach above-mentioned purpose, first aspect present invention embodiment proposes a kind of Energy Saving Control side of multiple on-line system
Method, the multiple on-line system includes outdoor unit and multiple indoor sets, wherein, the outdoor unit includes many frequency conversion compressions in parallel
Machine, the energy-saving control method comprises the following steps：When the multiple on-line system is under partial load condition, obtain described many
The demand frequency of on-line system；Demand frequency to the multiple on-line system judges, and according to judged result control
The number of units that frequency-changeable compressor is opened is to improve the efficiency of the multiple on-line system.
The energy-saving control method of the multiple on-line system proposed according to embodiments of the present invention, is in part negative in multiple on-line system
During lotus operating mode, the demand frequency of multiple on-line system is obtained, then the demand frequency to multiple on-line system judges, and according to sentencing
The number of units that disconnected output control frequency-changeable compressor is opened.Thus when multiple on-line system be in partial load condition under, can be according to many
The number of units that the demand FREQUENCY CONTROL frequency-changeable compressor of on-line system is opened, so that the efficiency of multiple on-line system is improved, it is effectively save
The energy, lifts the experience of user.
In addition, the energy-saving control method of the multiple on-line system proposed according to the above embodiment of the present invention, can also have such as
The technical characteristic added down：
According to one embodiment of present invention, many frequency-changeable compressors in parallel are the first frequency-changeable compressor and second
During frequency-changeable compressor, the number of units opened according to the judged result control frequency-changeable compressor, including：When the demand frequency
During less than predeterminated frequency, a unlatching in first frequency-changeable compressor and the second frequency-changeable compressor is controlled；When the demand
When frequency is more than predeterminated frequency, first frequency-changeable compressor and the second frequency-changeable compressor is controlled to open.
According to one embodiment of present invention, many frequency-changeable compressors in parallel are the first frequency-changeable compressor and second
During frequency-changeable compressor, the number of units opened according to the judged result control frequency-changeable compressor, including：When the multi-connected machine system
When the demand frequency of system is in ascendant trend, if the demand frequency of the multiple on-line system is more than predeterminated frequency and first frequency
Threshold value sum and continue the first preset time, then control first frequency-changeable compressor and the second frequency-changeable compressor to open；When
When the demand frequency of the multiple on-line system is in downward trend, if the demand frequency of the multiple on-line system is less than default frequency
The difference of rate and second frequency threshold value and continue the second preset time, then control first frequency-changeable compressor and the second frequency conversion to compress
A unlatching in machine.
According to one embodiment of present invention, it is described many when in the multiple indoor set when being partially in working condition
On-line system is in partial load condition.
To reach above-mentioned purpose, second aspect of the present invention embodiment proposes a kind of non-transitory computer-readable storage medium
Matter, is stored thereon with computer program, and its program stored realizes above-mentioned energy-saving control method when being executed by processor.
The non-transitorycomputer readable storage medium proposed according to embodiments of the present invention, the Energy Saving Control of multiple on-line system
Method is stored in wherein in the form of a computer program, by performing the program, can realize the demand by multiple on-line system
The number of units that FREQUENCY CONTROL frequency-changeable compressor is opened, so that the efficiency of multiple on-line system is improved, the effectively save energy, lifting user's
Experience.
To reach above-mentioned purpose, third aspect present invention embodiment proposes a kind of Energy Saving Control dress of multiple on-line system
Put, the multiple on-line system includes outdoor unit and multiple indoor sets, wherein, the outdoor unit includes many frequency conversion compressions in parallel
Machine, the energy-saving control device includes：Acquisition module, institute is obtained for being in the multiple on-line system under partial load condition
State the demand frequency of multiple on-line system；Judge module, judges for the demand frequency to the multiple on-line system；Control mould
Block, for controlling the number of units of the frequency-changeable compressor unlatching to improve the efficiency of the multiple on-line system according to judged result.
The energy-saving control device of the multiple on-line system proposed according to embodiments of the present invention, by acquisition module in multi-connected machine system
System is in the demand frequency that multiple on-line system is obtained under partial load condition, and judge module enters to the demand frequency of multiple on-line system
Row judges that then control module controls the number of units that frequency-changeable compressor is opened to improve the energy of multiple on-line system according to judged result
Effect.Thus, can be according to the demand FREQUENCY CONTROL frequency conversion pressure of multiple on-line system when multiple on-line system is under partial load condition
The number of units that contracting machine is opened, so as to improve the efficiency of multiple on-line system, the effectively save energy lifts the experience of user.
In addition, the energy-saving control device of the multiple on-line system proposed according to the above embodiment of the present invention, can also have such as
The technical characteristic added down：
According to one embodiment of present invention, when many frequency-changeable compressors in parallel are the first frequency-changeable compressor and the
During two frequency-changeable compressors, the control module is additionally operable to, and when the demand frequency is less than predeterminated frequency, controls described first to become
A unlatching in frequency compressor and the second frequency-changeable compressor；When the demand frequency is more than predeterminated frequency, described the is controlled
One frequency-changeable compressor and the second frequency-changeable compressor are opened.
According to one embodiment of present invention, when many frequency-changeable compressors in parallel are the first frequency-changeable compressor and the
During two frequency-changeable compressors, the control module is additionally operable to, when the demand frequency of the multiple on-line system is in ascendant trend, such as
The demand frequency of really described multiple on-line system is more than predeterminated frequency and first frequency threshold value sum and continues the first preset time, then
First frequency-changeable compressor and the second frequency-changeable compressor is controlled to open；When the demand frequency of the multiple on-line system is in down
During drop trend, if the demand frequency of the multiple on-line system is less than the difference of predeterminated frequency and second frequency threshold value and continues second
Preset time, then control one in first frequency-changeable compressor and the second frequency-changeable compressor to open.
According to one embodiment of present invention, it is described many when in the multiple indoor set when being partially in working condition
On-line system is in partial load condition.
To reach above-mentioned purpose, fourth aspect present invention embodiment proposes a kind of multiple on-line system, and it includes above-mentioned
Energy-saving control device.
The multiple on-line system proposed according to embodiments of the present invention, when multiple on-line system be in partial load condition under, can
The number of units opened according to the demand FREQUENCY CONTROL frequency-changeable compressor of multiple on-line system, so as to improve the efficiency of multiple on-line system, has
Effect saves the energy, lifts the experience of user.
Brief description of the drawings
Fig. 1 is the flow chart of the energy-saving control method of the multiple on-line system according to the embodiment of the present invention；
Fig. 2 is the structural representation of the multiple on-line system according to one embodiment of the invention；
Fig. 3 is the schematic diagram of the frequency according to the multiple on-line system of one embodiment of the invention and efficiency relation；
Fig. 4 is the frequency and the schematic diagram of time relationship of the multiple on-line system according to one embodiment of the invention；
Fig. 5 is the block diagram of the energy-saving control device of the multiple on-line system according to the embodiment of the present invention；And
Fig. 6 is the block diagram of the multiple on-line system according to the embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below in conjunction with the accompanying drawings come the energy-saving control method of the multiple on-line system that describes the embodiment of the present invention, multiple on-line system
Energy-saving control device and multiple on-line system.
Fig. 1 is the flow chart of the energy-saving control method of the multiple on-line system according to the embodiment of the present invention.Wherein, multi-connected machine system
System includes outdoor unit and multiple indoor sets, and outdoor unit includes many frequency-changeable compressors in parallel, for example, outdoor as shown in Figure 2
Machine includes two frequency-changeable compressors (i.e. the first frequency-changeable compressor and the second frequency-changeable compressor), and specifically, multiple compressors can be simultaneously
Connection connection, the exhaust outlet of multiple compressors is connected after being connected with the first end of four-way valve, the second end of four-way valve successively with outdoor
Heat exchanger, outdoor throttle part are connected with high-pressure stop valve, one end phase after the gas returning port of multiple compressors is connected with low-pressure tank
Even, the other end of low-pressure tank is connected with the 3rd end of four-way valve, and the 4th end of four-way valve is connected with low-pressure shutoff valve.
As shown in figure 1, the energy-saving control method of the multiple on-line system of the embodiment of the present invention comprises the following steps：
S1：When multiple on-line system is under partial load condition, the demand frequency of multiple on-line system is obtained.
Wherein, according to one embodiment of present invention, when in multiple indoor sets when being partially in working condition, multi-connected machine
System is in partial load condition.
S2：Demand frequency to multiple on-line system judges, and controls what frequency-changeable compressor was opened according to judged result
Number of units is to improve the efficiency of multiple on-line system.
Specifically, in multiple on-line system running, when being partially in multiple indoor sets of multiple on-line system
During working condition, multiple on-line system is in partial load condition, now, the demand frequency of multiple on-line system is obtained, then to many
The demand frequency of on-line system is judged, and controls the number of units that frequency-changeable compressor is opened according to judged result, multi-joint to improve
The efficiency of machine system.
According to one embodiment of present invention, as shown in Fig. 2 many frequency-changeable compressors in parallel are the first frequency-changeable compressor
During with the second frequency-changeable compressor, the number of units that frequency-changeable compressor is opened is controlled according to judged result, including：When demand frequency is less than in advance
If during frequency, a unlatching in the first frequency-changeable compressor of control and the second frequency-changeable compressor；When demand frequency is more than default frequency
During rate, the first frequency-changeable compressor of control and the second frequency-changeable compressor are opened.
It should be noted that as shown in figure 3, the characteristic being had by oneself according to frequency-changeable compressor, opens separate unit frequency-changeable compressor
The relation of efficiency and frequency as shown in the curve a1 in Fig. 3, that is, can open the efficiency of separate unit frequency-changeable compressor, meet with frequency
Increase first rises the relation declined afterwards；The efficiency of two frequency-changeable compressors of unlatching and the relation of frequency can be such as the curve a2 in Fig. 3
It is shown, wherein, curve a2 can be understood as the frequency sum of two frequency-changeable compressors, will two frequency-changeable compressors total energy effect
Efficiency curve equal with the frequency that frequency relation is reduced to two frequency-changeable compressors and with separate unit frequency-changeable compressor characteristic, because
This is met as frequency increase first rises the relation declined afterwards due to the efficiency curve of separate unit frequency-changeable compressor, then opens two changes
The total energy effect of frequency compressor, also meets and first rises the relation that declines afterwards as frequency increases, but due to two frequency-changeable compressors
Peak lags far behind the frequency rising part that two frequency-changeable compressors are only chosen in a frequency-changeable compressor, Fig. 3.Also,
The efficiency that separate unit frequency-changeable compressor is opened when frequency is relatively low is more than the efficiency for opening two frequency-changeable compressors, in frequency compared with Gao Shikai
The efficiency for opening two frequency-changeable compressors is more than the efficiency for opening separate unit frequency-changeable compressor.In other words, curve a1 and curve a2 is present
Intersection point, as shown in figure 3, curve a1 intersects with curve a2 in X points, predeterminated frequency X can be the frequency values of X points, and predeterminated frequency X is represented
The critical value when efficiency of two frequency-changeable compressors of efficiency and unlatching of unlatching separate unit frequency-changeable compressor is equal, wherein, preset frequency
Rate X changes with every frequency-changeable compressor and the attribute of multiple on-line system.Open single when demand frequency is less than predeterminated frequency X
The efficiency of platform frequency-changeable compressor is more than the efficiency for opening two frequency-changeable compressors, is opened when demand frequency is higher than predeterminated frequency X
The efficiency of two frequency-changeable compressors is more than the efficiency for opening separate unit frequency-changeable compressor.
That is, in the situation that many frequency-changeable compressors in parallel are the first frequency-changeable compressor and the second frequency-changeable compressor
Under, when multiple on-line system is in partial load condition, the opening ways of compressor may include compressor high frequency operation or
Two compressor low-frequency operations, i.e., when demand frequency is less than predeterminated frequency, open the first frequency-changeable compressor or the second frequency conversion pressure
Contracting machine；When demand frequency is more than predeterminated frequency, the first frequency-changeable compressor and the second frequency-changeable compressor are opened.
In addition, in some embodiments of the invention, when the number of units of frequency-changeable compressor is more than two, such as frequency-changeable compressor
Number of units when being N (N for integer) more than 2, can according to the efficiency and the relation of frequency for opening separate unit frequency-changeable compressor, open two
The efficiency of platform frequency-changeable compressor and the relation of frequency ..., open the efficiency of N platform frequency-changeable compressors and the relation of frequency set to
A few predeterminated frequency X, for example, obtaining at least one according to the intersection point above between this three efficiencies and the relation curve of frequency
Predeterminated frequency X, then divides frequency separation according at least one predeterminated frequency X.And then, obtaining the demand frequency of multiple on-line system
After rate, the frequency separation residing for demand frequency is determined, and according to corresponding of the optimal curve of efficiency in residing frequency separation
The number of units that numerical control frequency-changeable compressor is opened, to improve the efficiency of multiple on-line system.
According to one embodiment of present invention, as shown in figure 4, when the demand frequency of multiple on-line system is in ascendant trend
When, if the demand frequency of multiple on-line system is more than predeterminated frequency and first frequency threshold value a sums and continues the first preset time
T1, then control the first frequency-changeable compressor and the second frequency-changeable compressor to open；Decline when the demand frequency of multiple on-line system is in
During trend, if the demand frequency of multiple on-line system is less than predeterminated frequency and second frequency threshold value b difference and to continue second default
Time t2, then control one in the first frequency-changeable compressor and the second frequency-changeable compressor to open.
It should be noted that first frequency threshold value a can be preset with second frequency threshold value b, both can also may be used with equal
With unequal.Wherein, predeterminated frequency and first frequency threshold value a sums can be 90Hz, predeterminated frequency and second frequency threshold value b difference
Can be 70Hz, the first preset time t 1 and the second preset time t 2 can be 1 minute.
That is, many frequency-changeable compressors in parallel of multiple on-line system are the first frequency-changeable compressor and the second frequency conversion pressure
Contracting machine, when the indoor set intermediate portion of multiple on-line system is in working condition, obtains the demand frequency of multiple on-line system, when multi-joint
When the demand frequency of machine system is in ascendant trend, judge the demand frequency of multiple on-line system whether more than predeterminated frequency X and the
One frequency threshold a sums, if the demand frequency of multiple on-line system is more than predeterminated frequency X and first frequency threshold value a sums, i.e. X+
A, then determine whether that the demand frequency of multiple on-line system is more than predeterminated frequency X and the duration of first frequency threshold value a sums
Whether the first preset time t 1 is more than or equal to, if the demand frequency of multiple on-line system is more than predeterminated frequency X and first frequency
Threshold value a sums and continue the first preset time t 1, then control the first frequency-changeable compressor and the second frequency-changeable compressor to open, i.e.,
Speech, as shown in figure 4, falling on interval A when the demand frequency of multiple on-line system is increased over X+a and continuing the first preset time
During t1, two frequency-changeable compressors are opened；When the demand frequency of multiple on-line system is in downward trend, multiple on-line system is judged
Whether demand frequency is less than predeterminated frequency X and second frequency threshold value b difference, i.e. X-b, if the demand frequency of multiple on-line system is small
In predeterminated frequency X and second frequency threshold value b difference, then determine whether that the demand frequency of multiple on-line system is less than predeterminated frequency X
And whether the duration of second frequency threshold value b difference is more than or equal to the second preset time t 2, if the need of multiple on-line system
Ask frequency to be less than predeterminated frequency X and second frequency threshold value b difference and continue the second preset time t 2, then control the first frequency conversion to compress
One in machine and the second frequency-changeable compressor unlatching, that is, say, as shown in figure 4, when the demand frequency of multiple on-line system drop to it is low
It is to fall on interval B and when continuing the second preset time t 2 in X-b, opens any frequency-changeable compressor.
In addition, in some embodiments of the invention, when the number of units of frequency-changeable compressor is more than two, predeterminated frequency X can
For at least one, in each predeterminated frequency X vicinity, can according to two frequency-changeable compressors in previous embodiment control mode
The number of units for controlling frequency-changeable compressor to open.
In summary, the energy-saving control method of multiple on-line system according to embodiments of the present invention, by multiple on-line system
During in partial load condition, the demand frequency of multiple on-line system is obtained, then the demand frequency to multiple on-line system is sentenced
It is disconnected, and the number of units that frequency-changeable compressor is opened is controlled according to judged result, thus when multiple on-line system is under partial load condition,
The number of units that can be opened according to the demand FREQUENCY CONTROL frequency-changeable compressor of multiple on-line system, so as to improve the energy of multiple on-line system
Effect, the effectively save energy lifts the experience of user.
This hair embodiment also proposed a kind of non-transitorycomputer readable storage medium, be stored thereon with computer journey
Sequence, the program realizes above-mentioned energy-saving control method when being executed by processor.
Non-transitorycomputer readable storage medium according to embodiments of the present invention, the energy-saving control method of multiple on-line system
It is stored in the form of a computer program wherein, by performing the program, the demand frequency by multiple on-line system can be realized
The number of units for controlling frequency-changeable compressor to open, so as to improve the efficiency of multiple on-line system, the effectively save energy lifts the body of user
Test.
Fig. 5 is the block diagram of the energy-saving control device of the multiple on-line system according to the embodiment of the present invention.Wherein, it is multi-joint
Machine system includes outdoor unit and multiple indoor sets, and outdoor unit includes many frequency-changeable compressors in parallel, for example, as shown in Figure 2
Outdoor unit includes two frequency-changeable compressors (i.e. the first frequency-changeable compressor 1 and the second frequency-changeable compressor 2), specifically, many compressions
Machine can be connected in parallel, and the exhaust outlet of multiple compressors is connected after being connected with the first end D of four-way valve 3, the second end C of four-way valve 3
Be connected successively with outdoor heat exchanger 4, outdoor throttle part 5 and high-pressure stop valve 6, the gas returning ports of multiple compressors be connected afterwards with it is low
One end of tank 7 is pressed to be connected, the other end of low-pressure tank 7 connects with the 3rd end S-phase of four-way valve 3, the 4th end E and low pressure of four-way valve 3
Stop valve 8 is connected.
As shown in figure 5, the energy-saving control device of the multiple on-line system of the embodiment of the present invention includes：Acquisition module 10, judgement
Module 20 and control module 30.
Wherein, acquisition module 10 is used for the demand that multiple on-line system is obtained in the case where multiple on-line system is in partial load condition
Frequency；Judge module 20 is used to judge the demand frequency of multiple on-line system；Control module 30 is used for according to judged result
The number of units that frequency-changeable compressor is opened is controlled to improve the efficiency of multiple on-line system.
Specifically, according to one embodiment of present invention, it is multi-joint when in multiple indoor sets when being partially in working condition
Machine system is in partial load condition.
That is, in multiple on-line system running, when being partially in multiple indoor sets of multiple on-line system
During working condition, multiple on-line system is in partial load condition, now, and acquisition module 10 obtains the demand frequency of multiple on-line system
Rate, then judge module 20 control module 30 is sentenced according to judge module 20 to be judged to the demand frequency of multiple on-line system
The number of units that disconnected output control frequency-changeable compressor is opened, to improve the efficiency of multiple on-line system.
According to one embodiment of present invention, as shown in Fig. 2 when many frequency-changeable compressors in parallel compress for the first frequency conversion
When machine 1 and the second frequency-changeable compressor 2, control module 30 is additionally operable to, and when demand frequency is less than predeterminated frequency, controls the first frequency conversion
A unlatching in the frequency-changeable compressor 2 of compressor 1 and second；When demand frequency is more than predeterminated frequency, the first frequency conversion pressure is controlled
The frequency-changeable compressor 2 of contracting machine 1 and second is opened.
It should be noted that as shown in figure 3, the characteristic being had by oneself according to frequency-changeable compressor, opens separate unit frequency-changeable compressor
The relation of efficiency and frequency as shown in the curve a1 in Fig. 3, that is, can open the efficiency of separate unit frequency-changeable compressor, meet with frequency
Increase first rises the relation declined afterwards；The efficiency of two frequency-changeable compressors of unlatching and the relation of frequency can be such as the curve a2 in Fig. 3
It is shown, wherein, curve a2 can be understood as the frequency sum of two frequency-changeable compressors, will two frequency-changeable compressors total energy effect
Efficiency curve equal with the frequency that frequency relation is reduced to two frequency-changeable compressors and with separate unit frequency-changeable compressor characteristic, because
This is met as frequency increase first rises the relation declined afterwards due to the efficiency curve of separate unit frequency-changeable compressor, then opens two changes
The total energy effect of frequency compressor, also meets and first rises the relation that declines afterwards as frequency increases, but due to two frequency-changeable compressors
Peak lags far behind the frequency rising part that two frequency-changeable compressors are only chosen in a frequency-changeable compressor, Fig. 3.Also,
The efficiency that separate unit frequency-changeable compressor is opened when frequency is relatively low is more than the efficiency for opening two frequency-changeable compressors, in frequency compared with Gao Shikai
The efficiency for opening two frequency-changeable compressors is more than the efficiency for opening separate unit frequency-changeable compressor.In other words, curve a1 and curve a2 is present
Intersection point, as shown in figure 3, curve a1 intersects with curve a2 in X points, predeterminated frequency X can be the frequency values of X points, and predeterminated frequency X is represented
The critical value when efficiency of two frequency-changeable compressors of efficiency and unlatching of unlatching separate unit frequency-changeable compressor is equal, wherein, preset frequency
Rate X changes with every frequency-changeable compressor and the attribute of multiple on-line system.Open single when demand frequency is less than predeterminated frequency X
The efficiency of platform frequency-changeable compressor is more than the efficiency for opening two frequency-changeable compressors, is opened when demand frequency is higher than predeterminated frequency X
The efficiency of two frequency-changeable compressors is more than the efficiency for opening separate unit frequency-changeable compressor.
That is, in the feelings that many frequency-changeable compressors in parallel are the first frequency-changeable compressor 1 and the second frequency-changeable compressor 2
Under condition, when multiple on-line system is in partial load condition, the opening ways of compressor may include compressor high frequency operation or
The compressor low-frequency operation of person two, i.e., when demand frequency is less than predeterminated frequency, open the first frequency-changeable compressor 1 or the second frequency conversion
Compressor 2；When demand frequency is more than predeterminated frequency, the first frequency-changeable compressor 1 and the second frequency-changeable compressor 2 are opened.
In addition, in some embodiments of the invention, when the number of units of frequency-changeable compressor is more than two, such as frequency-changeable compressor
Number of units when being N (N for integer) more than 2, can according to the efficiency and the relation of frequency for opening separate unit frequency-changeable compressor, open two
The efficiency of platform frequency-changeable compressor and the relation of frequency ..., open the efficiency of N platform frequency-changeable compressors and the relation of frequency set to
A few predeterminated frequency X, for example, it is pre- to obtain at least one according to the intersection point above between three efficiencies and the relation curve of frequency
If frequency X, then frequency separation is divided according at least one predeterminated frequency X.And then, obtaining the demand frequency of multiple on-line system
Afterwards, the frequency separation residing for demand frequency is determined, and according to the corresponding number of units of the optimal curve of efficiency in residing frequency separation
The number of units for controlling frequency-changeable compressor to open, to improve the efficiency of multiple on-line system.
According to one embodiment of present invention, as shown in figure 4, when the demand frequency of multiple on-line system is in ascendant trend
When, if the demand frequency of multiple on-line system is more than predeterminated frequency and first frequency threshold value a sums and continues the first preset time
T1, then control the first frequency-changeable compressor 1 and the second frequency-changeable compressor 2 to open；When the demand frequency of multiple on-line system is in down
During drop trend, if the demand frequency of multiple on-line system is less than predeterminated frequency and second frequency threshold value b difference and to continue second pre-
If time t2, then one in the first frequency-changeable compressor 1 and the second frequency-changeable compressor 2 is controlled to open.
It should be noted that first frequency threshold value a can be preset with second frequency threshold value b, both can also may be used with equal
With unequal.Wherein, predeterminated frequency and first frequency threshold value a sums can be 90Hz, predeterminated frequency and second frequency threshold value b difference
Can be 70Hz, the first preset time t 1 and the second preset time t 2 can be 1 minute.
That is, many frequency-changeable compressors in parallel of multiple on-line system are the first frequency-changeable compressor 1 and the second frequency conversion
Compressor 2, when the indoor set intermediate portion of multiple on-line system is in working condition, acquisition module 10 obtains the need of multiple on-line system
Frequency is sought, when the demand frequency of multiple on-line system is in ascendant trend, judge module 20 judges the demand frequency of multiple on-line system
Whether rate is more than predeterminated frequency X and first frequency threshold value a sums, i.e. X+a is preset if the demand frequency of multiple on-line system is more than
Frequency X and first frequency threshold value a sums, then determine whether that module 20 judges that the demand frequency of multiple on-line system is more than default frequency
Whether rate X and the duration of first frequency threshold value a sums are more than or equal to the first preset time t 1, if multiple on-line system
Demand frequency is more than predeterminated frequency X and first frequency threshold value a sums and continues the first preset time t 1, then control module 30 is controlled
First frequency-changeable compressor 1 and the second frequency-changeable compressor 2 are opened, that is, are sayed, as shown in figure 4, when the demand frequency of multiple on-line system
When being increased over X+a and falling on interval A and continue the first preset time t 1, two frequency-changeable compressors are opened；When multi-connected machine system
When the demand frequency of system is in downward trend, judge module 20 judges whether the demand frequency of multiple on-line system is less than predeterminated frequency
X and second frequency threshold value b difference, i.e. X-b, if the demand frequency of multiple on-line system is less than predeterminated frequency X and second frequency threshold
Value b difference, then determine whether that module 20 judges that the demand frequency of multiple on-line system is less than predeterminated frequency X and second frequency threshold value
Whether the duration of b difference is more than or equal to the second preset time t 2, is preset if the demand frequency of multiple on-line system is less than
Frequency X and second frequency threshold value b difference and continue the second preset time t 2, then control module 30 controls the first frequency-changeable compressor 1
With a unlatching in the second frequency-changeable compressor 2, that is, say, as shown in figure 4, when the demand frequency of multiple on-line system is decreased below
X-b is when falling on interval B and continuing the second preset time t 2, to open any frequency-changeable compressor.
In addition, in some embodiments of the invention, when the number of units of frequency-changeable compressor is more than two, predeterminated frequency X can
For at least one, in each predeterminated frequency X vicinity, can according to two frequency-changeable compressors in previous embodiment control method
The number of units for controlling frequency-changeable compressor to open.
In summary, the energy-saving control device of multiple on-line system according to embodiments of the present invention, by acquisition module many
On-line system is in the demand frequency that multiple on-line system is obtained under partial load condition, demand of the judge module to multiple on-line system
Frequency is judged that then control module controls the number of units that frequency-changeable compressor is opened to improve multiple on-line system according to judged result
Efficiency.Thus when multiple on-line system is under partial load condition, it can be become according to the demand FREQUENCY CONTROL of multiple on-line system
The number of units that frequency compressor is opened, so as to improve the efficiency of multiple on-line system, the effectively save energy lifts the experience of user.
This hair embodiment also proposed a kind of multiple on-line system.
Fig. 6 is the block diagram of the multiple on-line system according to the embodiment of the present invention.As shown in fig. 6, multiple on-line system
200, it includes above-mentioned energy-saving control device 100.
Multiple on-line system according to embodiments of the present invention, when multiple on-line system be in partial load condition under, being capable of basis
The number of units that the demand FREQUENCY CONTROL frequency-changeable compressor of multiple on-line system is opened, so as to improve the efficiency of multiple on-line system, is effectively saved
About the energy, lifts the experience of user.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device or element of meaning must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are directly contacted, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. a kind of energy-saving control method of multiple on-line system, it is characterised in that the multiple on-line system includes outdoor unit and multiple
Indoor set, wherein, the outdoor unit includes many frequency-changeable compressors in parallel, and the energy-saving control method comprises the following steps：
When the multiple on-line system is under partial load condition, the demand frequency of the multiple on-line system is obtained；
Demand frequency to the multiple on-line system judges, and controls what the frequency-changeable compressor was opened according to judged result
Number of units is to improve the efficiency of the multiple on-line system.
2. the energy-saving control method of multiple on-line system according to claim 1, it is characterised in that many changes in parallel
It is described that the frequency-changeable compressor is controlled according to judged result when frequency compressor is the first frequency-changeable compressor and the second frequency-changeable compressor
The number of units of unlatching, including：
When the demand frequency is less than predeterminated frequency, one in first frequency-changeable compressor and the second frequency-changeable compressor is controlled
Platform is opened；
When the demand frequency is more than predeterminated frequency, first frequency-changeable compressor and the second frequency-changeable compressor is controlled to open
Open.
3. the energy-saving control method of multiple on-line system according to claim 1, it is characterised in that many changes in parallel
It is described that the frequency-changeable compressor is controlled according to judged result when frequency compressor is the first frequency-changeable compressor and the second frequency-changeable compressor
The number of units of unlatching, including：
When the demand frequency of the multiple on-line system is in ascendant trend, if the demand frequency of the multiple on-line system is more than
Predeterminated frequency and first frequency threshold value sum and continue the first preset time, then control first frequency-changeable compressor and second to become
Frequency compressor is opened；
When the demand frequency of the multiple on-line system is in downward trend, if the demand frequency of the multiple on-line system is less than
The difference of predeterminated frequency and second frequency threshold value and continue the second preset time, then control first frequency-changeable compressor and second to become
A unlatching in frequency compressor.
4. the energy-saving control method of the multiple on-line system according to any one of claim 1-3, it is characterised in that when described
In multiple indoor sets when being partially in working condition, the multiple on-line system be in partial load condition.
5. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, it is characterised in that the program quilt
The energy-saving control method according to any one of claim 1-4 is realized during computing device.
6. a kind of energy-saving control device of multiple on-line system, it is characterised in that the multiple on-line system includes outdoor unit and multiple
Indoor set, wherein, the outdoor unit includes many frequency-changeable compressors in parallel, and the energy-saving control device includes：
Acquisition module, the demand frequency of the multiple on-line system is obtained for being in the multiple on-line system under partial load condition
Rate；
Judge module, judges for the demand frequency to the multiple on-line system；
Control module, for controlling the number of units of the frequency-changeable compressor unlatching to improve the multiple on-line system according to judged result
Efficiency.
7. the energy-saving control device of multiple on-line system according to claim 6, it is characterised in that when described many it is in parallel
When frequency-changeable compressor is the first frequency-changeable compressor and the second frequency-changeable compressor, the control module is additionally operable to,
When the demand frequency is less than predeterminated frequency, one in first frequency-changeable compressor and the second frequency-changeable compressor is controlled
Platform is opened；
When the demand frequency is more than predeterminated frequency, first frequency-changeable compressor and the second frequency-changeable compressor is controlled to open
Open.
8. the energy-saving control device of multiple on-line system according to claim 6, it is characterised in that when described many it is in parallel
When frequency-changeable compressor is the first frequency-changeable compressor and the second frequency-changeable compressor, the control module is additionally operable to,
When the demand frequency of the multiple on-line system is in ascendant trend, if the demand frequency of the multiple on-line system is more than
Predeterminated frequency and first frequency threshold value sum and continue the first preset time, then control first frequency-changeable compressor and second to become
Frequency compressor is opened；
When the demand frequency of the multiple on-line system is in downward trend, if the demand frequency of the multiple on-line system is less than
The difference of predeterminated frequency and second frequency threshold value and continue the second preset time, then control first frequency-changeable compressor and second to become
A unlatching in frequency compressor.
9. the energy-saving control device of the multiple on-line system according to any one of claim 6-8, it is characterised in that when described
In multiple indoor sets when being partially in working condition, the multiple on-line system be in partial load condition.
10. a kind of multiple on-line system, it is characterised in that including the multiple on-line system according to any one of claim 6-9
Energy-saving control device.
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| CN108800467A (en) * | 2018-06-19 | 2018-11-13 | 广东美的制冷设备有限公司 | Control method, device and the air-conditioning with it of air-conditioning |
| CN109163427A (en) * | 2018-08-14 | 2019-01-08 | 广东美的暖通设备有限公司 | Control method, control device and the multi-line system of multi-line system |
| CN109237709A (en) * | 2018-08-31 | 2019-01-18 | 青岛海尔空调电子有限公司 | A kind of multi-connected machine control method |
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| CN110160126B (en) * | 2019-04-18 | 2021-02-09 | 广东智科电子股份有限公司 | Variable-frequency heating multi-split control method, device, equipment and storage medium |
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Application publication date: 20171017 |