CN104728998A - Control method and device of photovoltaically-powered air conditioning unit - Google Patents
Control method and device of photovoltaically-powered air conditioning unit Download PDFInfo
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- CN104728998A CN104728998A CN201310717716.9A CN201310717716A CN104728998A CN 104728998 A CN104728998 A CN 104728998A CN 201310717716 A CN201310717716 A CN 201310717716A CN 104728998 A CN104728998 A CN 104728998A
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- conditioner set
- air
- machine unit
- outer machine
- described air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method and device of a photovoltaically-powered air conditioning unit. The control method includes: acquiring actual output power of a photovoltaic inverter which powers the air conditioning unit; determining output capacity of the air conditioning unit through the actual output power of the photovoltaic inverter; on the basis of the output capacity of the air conditioning unit, adjusting the quantity of outdoor units to be started, in the air conditioning unit. The control method and device allow the photovoltaically-powered air conditioning unit to output more stably.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of control method and device of photovoltaic power supply air-conditioner set.
Background technology
At present, seldom or also there is no solar energy on the market as the air-conditioner set of the energy, along with the extensive use of solar energy, adopt the photovoltaic of the sun to power to air-conditioner set, realize the pure direct current supply of air-conditioner set or control to become the development trend of air-conditioning market.Inventor finds, the impact being subject to environment due to photovoltaic generation is larger, air-conditioner set is when using photovoltaic power supply, be difficult to the stability ensureing Properties of Air-conditioning Unit, the output of air-conditioner set is unstable, low to the utilization rate of the real output of photovoltaic DC-to-AC converter, make air-conditioner set carry out power supply at use photovoltaic and run into obstacle.
For the problem of the output instability of photovoltaic power supply air-conditioner set in prior art, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is the control method and the device that provide a kind of photovoltaic power supply air-conditioner set, to solve the problem of the output instability of photovoltaic power supply air-conditioner set in prior art.
To achieve these goals, according to an aspect of the present invention, a kind of control method of photovoltaic power supply air-conditioner set is provided.Control method according to photovoltaic power supply air-conditioner set of the present invention comprises: the real output being retrieved as the photovoltaic DC-to-AC converter that air-conditioner set is powered; By the fan-out capability of the real output determination air-conditioner set of photovoltaic DC-to-AC converter; And based on needing the quantity of the outer machine unit opened in the fan-out capability adjustment air-conditioner set of air-conditioner set.
Further, after the real output being retrieved as the photovoltaic DC-to-AC converter that air-conditioner set is powered, control method also comprises: the current system pressure value of sampling air-conditioner set, wherein, comprised by the fan-out capability of the real output determination air-conditioner set of photovoltaic DC-to-AC converter: the total capacity requirements obtaining air-conditioner set; By the total capacity requirements of the power of photovoltaic and the current system pressure value adjusting air conditioning group of air-conditioner set, obtain the service ability value of air-conditioner set; From service ability value, determine the fan-out capability of air-conditioner set, need the quantity of the outer machine unit opened to comprise based in the fan-out capability adjustment air-conditioner set of air-conditioner set: the quantity confirming to need in air-conditioner set the outer machine unit opened by the service ability value of air-conditioner set.
Further, the total capacity requirements obtaining air-conditioner set comprises: the temperature obtaining the temperature of the current operating environment of machine unit in air-conditioner set and the current operating environment of air-conditioner set China and foreign countries machine unit; The capacity factor of interior machine unit is obtained by the temperature computation of the temperature of the current operating environment of interior machine unit and the current operating environment of outer machine unit; Obtain the rated capacity of machine unit in air-conditioner set; And the total capacity requirements of air-conditioner set is calculated by the rated capacity of interior machine unit and the capacity factor of interior machine unit.
Further, after the service ability value by air-conditioner set confirms the quantity of the outer machine unit needing unlatching in air-conditioner set, control method also comprises: the quantity of the outer machine unit opened as required and the service ability value of air-conditioner set control the frequency needing the compressor opened in air-conditioner set.
Further, confirm to need the quantity of the outer machine unit opened to comprise in air-conditioner set: the start demand order obtaining current outer machine unit by the service ability value of air-conditioner set, the order of start demand is for opening outer machine unit, the unlatching quantity needing the outer machine unit opened is determined based on the order of start demand, after the service ability value by air-conditioner set confirms the quantity of the outer machine unit needing unlatching in air-conditioner set, control method also comprises: the quantity detecting the outer machine unit that needs are opened based on the order of start demand, the quantity of the outer machine unit opened as required and the service ability value of air-conditioner set control to need the frequency of the compressor opened to comprise in air-conditioner set: if detect the outer machine unit of unlatching one, then control by the service ability value of air-conditioner set the frequency needing the compressor opened, if detect and open multiple outer machine unit, then the service ability value of air-conditioner set is distributed in order the outer machine unit of unlatching, the outer machine unit being assigned to service ability value controls to need the frequency of the compressor opened according to the ability value of compressor.
To achieve these goals, according to a further aspect in the invention, a kind of control device of photovoltaic power supply air-conditioner set is provided.Control method according to photovoltaic power supply air-conditioner set of the present invention comprises: acquiring unit, for being retrieved as the real output of the photovoltaic DC-to-AC converter that air-conditioner set is powered; Determining unit, for the fan-out capability of the real output determination air-conditioner set by photovoltaic DC-to-AC converter; And adjustment unit, adjust for the fan-out capability based on air-conditioner set the quantity needing the outer machine unit opened in air-conditioner set.
Further, control device also comprises: sampling unit, and for the current system pressure value of air-conditioner set of sampling, wherein, determining unit comprises: the first acquisition module, for obtaining the total capacity requirements of air-conditioner set; Adjustment module, for the total capacity requirements by the power of photovoltaic and the current system pressure value adjusting air conditioning group of air-conditioner set, obtains the service ability value of air-conditioner set; First determination module, for determining the fan-out capability of air-conditioner set from service ability value, adjustment unit is also for confirming by the service ability value of air-conditioner set the quantity needing the outer machine unit opened in air-conditioner set.
Further, the first acquisition module comprises: first obtains submodule, for the temperature of current operating environment of machine unit and the temperature of the current operating environment of air-conditioner set China and foreign countries machine unit in obtaining in air-conditioner set; First calculating sub module, the temperature computation for the temperature of the current operating environment by interior machine unit and the current operating environment of outer machine unit obtains the capacity factor of interior machine unit; Second obtains submodule, for obtaining the rated capacity of machine unit in air-conditioner set; And second calculating sub module, for being calculated the total capacity requirements of air-conditioner set by the rated capacity of interior machine unit and the capacity factor of interior machine unit.
Further, control device also comprises: control unit, after confirming the quantity of the outer machine unit needing unlatching in air-conditioner set in the service ability value by air-conditioner set, the quantity of the outer machine unit opened as required and the service ability value of air-conditioner set control the frequency needing the compressor opened in air-conditioner set.
Further, adjustment unit comprises: the second acquisition module, and for obtaining the start demand order of current outer machine unit, the order of start demand is for opening outer machine unit; Second determination module, for determining based on the order of start demand the quantity needing the outer machine unit opened, control device also comprises: detecting unit, after confirming the quantity of the outer machine unit needing unlatching in air-conditioner set in the service ability value by air-conditioner set, detect the quantity needing the outer machine unit opened, control unit comprises: the first control module, for when detecting a unlatching outer machine unit, controls by the service ability value of air-conditioner set the frequency needing the compressor opened; Second control module, for when detecting the multiple outer machine unit of unlatching, the service ability value of air-conditioner set is distributed in order the outer machine unit of unlatching, the outer machine unit being assigned to service ability value controls to need the frequency of the compressor opened according to the ability value of compressor.
Pass through the present invention, adopt the control method of photovoltaic power supply air-conditioner set, by obtaining the real output of photovoltaic DC-to-AC converter, by the fan-out capability of the real output determination air-conditioner set of this photovoltaic DC-to-AC converter, thus the quantity of the outer machine unit opened can be needed based on the fan-out capability adjustment of air-conditioner set, make air-conditioner set when using photovoltaic power supply, the quantity needing the outer machine unit opened can be adjusted adaptively according to the real output of photovoltaic DC-to-AC converter, the outer machine unit work requirements avoiding the real output due to photovoltaic DC-to-AC converter can not meet air-conditioner set causes the problem of the output instability of air-conditioner set, reach the effect improving the stability that photovoltaic power supply air-conditioner set exports.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the control device of photovoltaic power supply air-conditioner set according to a first embodiment of the present invention;
Fig. 2 is the structural representation of the control device of photovoltaic power supply air-conditioner set according to a second embodiment of the present invention;
Fig. 3 is the flow chart of the control method of photovoltaic power supply air-conditioner set according to a first embodiment of the present invention; And
Fig. 4 is the flow chart of the control method of photovoltaic power supply air-conditioner set according to a second embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in description of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that embodiments of the invention described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiments provide a kind of control device of photovoltaic power supply air-conditioner set, this device can realize its function by air-conditioner set.It should be noted that, the air-conditioner set mentioned of the embodiment of the present invention is photovoltaic power supply air-conditioner set, namely adopts the air-conditioner set of photovoltaic power supply.
Fig. 1 is the structural representation of the control device of photovoltaic power supply air-conditioner set according to a first embodiment of the present invention.As shown in Figure 1, the control device of this photovoltaic power supply air-conditioner set comprises acquiring unit 10, determining unit 20 and adjustment unit 30.
The real output of photovoltaic DC-to-AC converter of acquiring unit 10 for being retrieved as air-conditioner set and powering.
Air-conditioner set obtains electric energy by photovoltaic DC-to-AC converter from photovoltaic power supply unit (as photovoltaic plant).After photovoltaic DC-to-AC converter receives the direct current of photovoltaic power supply unit output, be translated into compressor and other loads of alternating current supply air-conditioner set.Because the power output of photovoltaic plant can produce power attenuation on photovoltaic DC-to-AC converter and other components and parts, acquiring unit 10 can obtain the input power of real output as air-conditioner set of photovoltaic DC-to-AC converter.The control system of air-conditioner set, then according to the real output of photovoltaic DC-to-AC converter, adjusts the fan-out capability of air-conditioner set.
Determining unit 20 is for the fan-out capability of the real output determination air-conditioner set by photovoltaic DC-to-AC converter.
The fan-out capability of air-conditioner set can be the fan-out capability of the reality of air-conditioner set.After the real output getting photovoltaic DC-to-AC converter, can by the fan-out capability of the real output determination air-conditioner set of photovoltaic DC-to-AC converter.Can be the fan-out capability determining air-conditioner set according to the size of the real output of photovoltaic DC-to-AC converter, such as, when the real output of photovoltaic DC-to-AC converter is larger, correspondingly increase the fan-out capability of air-conditioner set; When the real output of photovoltaic DC-to-AC converter is smaller, correspondingly reduce the fan-out capability of air-conditioner set.The corresponding power output of air-conditioner set etc. can be obtained by the fan-out capability of air-conditioner set.
Particularly, can be the total capacity requirements first calculating air-conditioner set, this total capacity requirements can be total fan-out capability of air-conditioner set.This total capacity requirements can be calculated according to the unlatching requirement capability of interior machine unit and the operating ambient temperature of interior machine unit, obtain the requirement capability of air-conditioner set.After the total capacity requirements obtaining air-conditioner set, the current system pressure value of air-conditioner set can be obtained by sampling, this force value can be the force value in the refrigerant pipeline in air-conditioner set, according to the total capacity requirements of this force value adjustment unit, obtains the fan-out capability of air-conditioner set.Because the force value in refrigerant pipeline is larger, the fan-out capability of air-conditioner set correspondingly also can increase, and the fan-out capability of air-conditioner set can be adjusted to suitable value according to the force value in refrigerant pipeline.Finally regulate further according to the fan-out capability of real output to the air-conditioner set obtained of photovoltaic DC-to-AC converter, the final fan-out capability of air-conditioner set and the real output of photovoltaic DC-to-AC converter are adapted.
Adjustment unit 30 adjusts for the fan-out capability based on air-conditioner set the quantity needing the outer machine unit opened in air-conditioner set.
After the fan-out capability determining air-conditioner set, can based on the quantity needing the outer machine unit opened in the fan-out capability adjustment air-conditioner set of air-conditioner set.Wherein, outer machine unit can be called outer machine module, and multiple outdoor machine of air-conditioner unit can be combined into an outdoor machine of air-conditioner system, can be needed the quantity of the outer machine module of opening by the fan-out capability of air-conditioner set from outdoor machine of air-conditioner system validation.
Particularly, by the demand of the fan-out capability of air-conditioner set according to outer machine unit, multiple outer machine unit can be distributed to, if only include an outer machine unit in air-conditioner set, then directly can regulate the frequency of compressor according to the fan-out capability demand of air-conditioner set.Further, following algorithm can be adopted to regulate:
f=Qf/K*90
Wherein, Qf is the ability need (i.e. the fan-out capability of air-conditioner set) of air-conditioner set, and f is the frequency of compressor, and K is the amount of capacity of compressor, and 90 is compressor frequency conversion coefficient.Obtained the frequency of compressor by this formulae discovery, thus the frequency of compressor is regulated.
According to the embodiment of the present invention, by obtaining the real output of photovoltaic DC-to-AC converter, by the fan-out capability of the real output determination air-conditioner set of this photovoltaic DC-to-AC converter, thus the quantity of the outer machine unit opened can be needed based on the fan-out capability adjustment of air-conditioner set, make air-conditioner set when using photovoltaic power supply, the quantity needing the outer machine unit opened can be adjusted adaptively according to the real output of photovoltaic DC-to-AC converter, the outer machine unit work requirements avoiding the real output due to photovoltaic DC-to-AC converter can not meet air-conditioner set causes the problem of the output instability of air-conditioner set, reach the effect improving the stability that photovoltaic power supply air-conditioner set exports.
Fig. 2 is the structural representation of the control device of photovoltaic power supply air-conditioner set according to a second embodiment of the present invention.The control device of the photovoltaic power supply air-conditioner set of this embodiment can as a kind of preferred embodiment of the control device of the photovoltaic power supply air-conditioner set shown in Fig. 1.As shown in Figure 2, the control device of this photovoltaic power supply air-conditioner set comprises acquiring unit 10, determining unit 20, adjustment unit 30 and sampling unit 40, and wherein, determining unit 20 comprises the first acquisition module 201, adjustment module 202 and the first determination module 203.Acquiring unit 10 is identical with acquiring unit 10 function shown in Fig. 1, does not repeat here.
Sampling unit 40 is for the current system pressure value of air-conditioner set of sampling.
The current system pressure value of air-conditioner set can be the current force value in the refrigerant pipeline of air-conditioner set, and this current system pressure value of sampling is so that adjust the fan-out capability of air-conditioner set.
It should be noted that, the current system pressure value of sampling air-conditioner set can be before the real output obtaining photovoltaic DC-to-AC converter, and also can be after the real output obtaining photovoltaic DC-to-AC converter, can be all realize object of the present invention.
First acquisition module 201 is for obtaining the total capacity requirements of air-conditioner set.
The total capacity requirements of the air-conditioner set obtained, can be obtain the total capacity requirements precalculating the air-conditioner set obtained, this total capacity requirements can be total fan-out capability of air-conditioner set, can calculate total capacity requirements according to the unlatching requirement capability of interior machine unit and the operating ambient temperature of interior machine unit.Obtain this total capacity requirements so that obtain the actual fan-out capability of air-conditioner set.
Preferably, the first acquisition module 201 comprises the first acquisition submodule, the first calculating sub module, second obtains submodule and the second calculating sub module.
First obtains submodule for the temperature of current operating environment of machine unit and the temperature of the current operating environment of air-conditioner set China and foreign countries machine unit in obtaining in air-conditioner set.An outer machine unit can to there being multiple interior machine unit, and in same air-conditioner set, environment residing for outer machine unit is substantially identical, the temperature of the current operating environment of the interior machine unit of acquisition, can be the temperature of the current operating environment obtaining multiple interior machine unit.First calculating sub module is for being obtained the capacity factor of interior machine unit by the temperature computation of the temperature of the current operating environment of interior machine unit and the current operating environment of outer machine unit.Correspondingly, when interior machine unit is multiple, the capacity factor of machine unit in each can be calculated respectively.Second obtains submodule for obtaining the rated capacity of machine unit in air-conditioner set, and this rated capacity can be corresponding interior rated power needed for the work of machine unit, also can be the power consumption needed for the work of interior machine unit.Second calculating sub module is used for the total capacity requirements being calculated air-conditioner set by the rated capacity of interior machine unit and the capacity factor of interior machine unit.
Particularly, can be after the controller control system of air-conditioner set powers on, the current operating environment temperature Ti-env of machine unit in control system receives, with the operating ambient temperature To-env of outer machine unit, the capacity factor Ac value (see formula 1) of machine unit in calculating respectively, the rated capacity Q of machine in control system receives
volume in, by the rated capacity Q of each interior machine unit
volume inbe multiplied with the capacity factor Ac of each interior machine unit and obtain the ability need of this interior machine, and the demand of each interior machine is added the total capacity demand Q obtaining complete machine machine set system
c is total(see formula 2)
Formula 1:
A
c={[(T
i-env-27)×1.5+100]+0.9×(T
o-env-35)}/100
Formula 2:
Q
c is total=∑ (Q
volume in* Ac)
According to the embodiment of the present invention, the total capacity requirements of air-conditioner set is obtained by the temperature computation of the running environment based on air-conditioner set, so that adjust to this total capacity requirements the fan-out capability obtaining air-conditioner set, thus ensure that the stability of Properties of Air-conditioning Unit further, meet the cooling and warming demand of user.
Adjustment module 202, for the total capacity requirements by the power of photovoltaic and the current system pressure value adjusting air conditioning group of air-conditioner set, obtains the service ability value of air-conditioner set.
Sample air-conditioner set current system pressure value and after getting the power of photovoltaic and the total capacity requirements of air-conditioner set, can be regulated by the total capacity requirements of power to air-conditioner set of current system pressure value and photovoltaic, obtain the service ability value of air-conditioner set; Also can be first regulated by the total capacity requirements of current system pressure value to air-conditioner set, then by the power of photovoltaic, adjustment result be regulated further, obtain the service ability value of final air-conditioner set.
First determination module 203 for determining the fan-out capability of air-conditioner set from service ability value.
Particularly, after the service ability value obtaining air-conditioner set, it can be the fan-out capability determining the reality of air-conditioner set from this ability runtime value.
Adjustment unit 30 is also for confirming by the service ability value of air-conditioner set the quantity needing the outer machine unit opened in air-conditioner set.
After the service ability value obtaining air-conditioner set, can based on the quantity needing the outer machine unit opened in the service ability value adjustment air-conditioner set of air-conditioner set.Wherein, outer machine unit can be called outer machine module, and multiple outdoor machine of air-conditioner unit can be combined into an outdoor machine of air-conditioner system, can be needed the quantity of the outer machine module of opening by the fan-out capability of air-conditioner set from outdoor machine of air-conditioner system validation.
Preferably, the control device of photovoltaic power supply air-conditioner set also comprises control unit, this control unit is used for after the service ability value by air-conditioner set confirms to need in air-conditioner set the quantity of the outer machine unit opened, and the quantity of the outer machine unit opened as required and the service ability value of air-conditioner set control the frequency needing the compressor opened in air-conditioner set.
Particularly, after can being the start demand of reception user, detect the quantity of current air-conditioner set China and foreign countries machine unit, when only having an outer machine unit in air-conditioner set, then directly according to the demand of air-conditioner set, the frequency of compressor can be controlled by control logics such as compressor capacity control algolithms.When the outer machine unit having multiple outer machine unit the service ability value of air-conditioner set can be distributed to unlatching according to the sequencing opened in air-conditioner set, know till distributing, then the ability be assigned to is controlled the frequency of compressor by each outer machine unit according to control logic, thus controls the power of compressor.
According to the embodiment of the present invention, the quantity of the outer machine unit opened as required and the service ability value of air-conditioner set control the frequency needing the compressor opened in air-conditioner set, thus ensure the peak use rate that the real output of photovoltaic DC-to-AC converter exports, realize energy-conservation while, ensure the stable output of air-conditioner set.
Preferably, adjustment unit 30 comprises the second acquisition module and the second determination module.Second acquisition module is for obtaining the start demand order of current outer machine unit, and the order of start demand is for opening outer machine unit.The order of start demand can be the order that user inputs as required, and user can control by the order of input start demand the quantity needing the outer machine unit opened.Second determination module is used for the quantity determining to need the outer machine unit opened based on the order of start demand.After getting outer machine unit power-on command, based on this power-on command using the service ability value of air-conditioner set as judgement basis, open the outer machine unit of respective numbers.
Control device also comprises detecting unit, and this detecting unit is used for, after the service ability value by air-conditioner set confirms to need in air-conditioner set the quantity of the outer machine unit opened, detecting the unlatching quantity needing the outer machine unit opened.Detecting and need the quantity of the outer machine unit opened can be detect from the start demand order of user's input the quantity needing the outer machine unit opened, also can be the quantity detecting air-conditioner set China and foreign countries machine unit.
Control unit comprises the first control module, distribution module and the second control module.First control module is used for when detecting a unlatching outer machine unit, controls by the service ability value of air-conditioner set the frequency needing the compressor opened.If only have an outer machine unit in air-conditioner set, then directly can be controlled the frequency of compressor by control logic according to unit, because the power of the frequency compression machine of compressor has certain relation, the frequency therefore by controlling compressor can control the power of compressor.
Second control module is used for when detecting the multiple outer machine unit of unlatching, the service ability value of air-conditioner set is distributed in order the outer machine unit of unlatching, the outer machine unit being assigned to service ability value controls to need the frequency of the compressor opened according to the ability value of compressor.Particularly, if detect in current air-conditioner set when having multiple outer machine unit, then the service ability value of air-conditioner set can be distributed to the outer machine unit of unlatching according to the opening sequence of outer machine unit, until distribute.Then the frequency of capability control compressor that will be assigned to of each outer machine unit opened.Wherein,
The embodiment of the present invention additionally provides a kind of control method of photovoltaic power supply air-conditioner set.The method operates in the control system of air-conditioner set.It should be noted that, the control device of the photovoltaic power supply air-conditioner set that the control method of the photovoltaic power supply air-conditioner set of the embodiment of the present invention can be provided by the embodiment of the present invention performs, and the control device of the photovoltaic power supply air-conditioner set of the embodiment of the present invention also may be used for the control method performing the photovoltaic power supply air-conditioner set that the embodiment of the present invention provides.
Fig. 3 is the flow chart of the control method of photovoltaic power supply air-conditioner set according to a first embodiment of the present invention.As shown in Figure 3, to comprise step as follows for the control method of this photovoltaic power supply air-conditioner set:
Step S101, is retrieved as the real output of the photovoltaic DC-to-AC converter that air-conditioner set is powered.
Air-conditioner set obtains electric energy by photovoltaic DC-to-AC converter from photovoltaic power supply unit (as photovoltaic plant).After photovoltaic DC-to-AC converter receives the direct current of photovoltaic power supply unit output, be translated into compressor and other loads of alternating current supply air-conditioner set.Because the power output of photovoltaic plant can produce power attenuation on photovoltaic DC-to-AC converter and other components and parts, but to obtain the input power of real output as air-conditioner set of photovoltaic DC-to-AC converter.The control system of air-conditioner set, then according to the real output of photovoltaic DC-to-AC converter, adjusts the fan-out capability of air-conditioner set.
Step S102, by the fan-out capability of the real output determination air-conditioner set of photovoltaic DC-to-AC converter.
The fan-out capability of air-conditioner set can be the fan-out capability of the reality of air-conditioner set.After the real output getting photovoltaic DC-to-AC converter, can by the fan-out capability of the real output determination air-conditioner set of photovoltaic DC-to-AC converter.Can be the fan-out capability determining air-conditioner set according to the size of the real output of photovoltaic DC-to-AC converter, such as, when the real output of photovoltaic DC-to-AC converter is larger, correspondingly increase the fan-out capability of air-conditioner set; When the real output of photovoltaic DC-to-AC converter is smaller, correspondingly reduce the fan-out capability of air-conditioner set.The corresponding power output of air-conditioner set etc. can be obtained by the fan-out capability of air-conditioner set.
Particularly, can be the total capacity requirements first calculating air-conditioner set, this total capacity requirements can be total fan-out capability of air-conditioner set.This total capacity requirements can be calculated according to the unlatching requirement capability of interior machine unit and the operating ambient temperature of interior machine unit, obtain the requirement capability of air-conditioner set.After the total capacity requirements obtaining air-conditioner set, the current system pressure value of air-conditioner set can be obtained by sampling, this force value can be the force value in the refrigerant pipeline in air-conditioner set, according to the total capacity requirements of this force value adjustment unit, obtains the fan-out capability of air-conditioner set.Because the force value in refrigerant pipeline is larger, the fan-out capability of air-conditioner set correspondingly also can increase, and the fan-out capability of air-conditioner set can be adjusted to suitable value according to the force value in refrigerant pipeline.Finally regulate further according to the fan-out capability of real output to the air-conditioner set obtained of photovoltaic DC-to-AC converter, the final fan-out capability of air-conditioner set and the real output of photovoltaic DC-to-AC converter are adapted.
Step S103, based on the quantity needing the outer machine unit opened in the fan-out capability adjustment air-conditioner set of air-conditioner set.
After the fan-out capability determining air-conditioner set, can based on the quantity needing the outer machine unit opened in the fan-out capability adjustment air-conditioner set of air-conditioner set.Wherein, outer machine unit can be called outer machine module, and multiple outdoor machine of air-conditioner unit can be combined into an outdoor machine of air-conditioner system, can be needed the quantity of the outer machine module of opening by the fan-out capability of air-conditioner set from outdoor machine of air-conditioner system validation.
Particularly, by the demand of the fan-out capability of air-conditioner set according to outer machine unit, multiple outer machine unit can be distributed to, if only include an outer machine unit in air-conditioner set, then directly the fan-out capability demand of air-conditioner set can be regulated the frequency of compressor.
According to the embodiment of the present invention, by obtaining the real output of photovoltaic DC-to-AC converter, by the fan-out capability of the real output determination air-conditioner set of this photovoltaic DC-to-AC converter, thus the quantity of the outer machine unit opened can be needed based on the fan-out capability adjustment of air-conditioner set, make air-conditioner set when using photovoltaic power supply, the quantity needing the outer machine unit opened can be adjusted adaptively according to the real output of photovoltaic DC-to-AC converter, the outer machine unit work requirements avoiding the real output due to photovoltaic DC-to-AC converter can not meet air-conditioner set causes the problem of the output instability of air-conditioner set, reach the effect improving the stability that photovoltaic power supply air-conditioner set exports.
Fig. 4 is the flow chart of the control method of photovoltaic power supply air-conditioner set according to a second embodiment of the present invention.The control method of the photovoltaic power supply air-conditioner set of this embodiment can be a kind of preferred embodiment of the control method of the photovoltaic power supply air-conditioner set of above-described embodiment.As shown in Figure 4, to comprise step as follows for the control method of this photovoltaic power supply air-conditioner set:
Step S201, is retrieved as the real output of the photovoltaic DC-to-AC converter that air-conditioner set is powered.
Air-conditioner set obtains electric energy by photovoltaic DC-to-AC converter from photovoltaic power supply unit (as photovoltaic plant).After photovoltaic DC-to-AC converter receives the direct current of photovoltaic power supply unit output, be translated into compressor and other loads of alternating current supply air-conditioner set.Because the power output of photovoltaic plant can produce power attenuation on photovoltaic DC-to-AC converter and other components and parts, but to obtain the input power of real output as air-conditioner set of photovoltaic DC-to-AC converter.The control system of air-conditioner set, then according to the real output of photovoltaic DC-to-AC converter, adjusts the fan-out capability of air-conditioner set.
Step S202, the current system pressure value of sampling air-conditioner set.
The current system pressure value of air-conditioner set can be the current force value in the refrigerant pipeline of air-conditioner set, and this current system pressure value of sampling is so that adjust the fan-out capability of air-conditioner set.
It should be noted that, the current system pressure value of sampling air-conditioner set can be before the real output obtaining photovoltaic DC-to-AC converter, and also can be after the real output obtaining photovoltaic DC-to-AC converter, can be all realize object of the present invention.
Step S203, obtains the total capacity requirements of air-conditioner set.
The total capacity requirements of the air-conditioner set obtained, can be obtain the total capacity requirements precalculating the air-conditioner set obtained, this total capacity requirements can be total fan-out capability of air-conditioner set, can calculate total capacity requirements according to the unlatching requirement capability of interior machine unit and the operating ambient temperature of interior machine unit.Obtain this total capacity requirements so that obtain the actual fan-out capability of air-conditioner set.
Preferably, step S203 can realize in the following manner: first, obtains the temperature of the temperature of the current operating environment of machine unit in air-conditioner set and the current operating environment of air-conditioner set China and foreign countries machine unit.An outer machine unit can to there being multiple interior machine unit, and in same air-conditioner set, environment residing for outer machine unit is substantially identical, the temperature of the current operating environment of the interior machine unit of acquisition, can be the temperature of the current operating environment obtaining multiple interior machine unit.
Secondly, the capacity factor of interior machine unit is obtained by the temperature computation of the temperature of the current operating environment of interior machine unit and the current operating environment of outer machine unit.Correspondingly, when interior machine unit is multiple, the capacity factor of machine unit in each can be calculated respectively.
Then, the rated capacity of machine unit in air-conditioner set is obtained.This rated capacity can be corresponding interior rated power needed for the work of machine unit, also can be the power consumption needed for the work of interior machine unit.
Finally, the total capacity requirements of air-conditioner set is calculated by the rated capacity of interior machine unit and the capacity factor of interior machine unit.
Particularly, can be after the controller control system of air-conditioner set powers on, the current operating environment temperature Ti-env of machine unit in control system receives, with the operating ambient temperature To-env of outer machine unit, the capacity factor Ac value (see formula 1) of machine unit in calculating respectively, the rated capacity Q of machine in control system receives
volume in, by the rated capacity Q of each interior machine unit
volume inbe multiplied with the capacity factor Ac of each interior machine unit and obtain the ability need of this interior machine, and the demand of each interior machine is added the total capacity demand Q obtaining complete machine machine set system
c is total(see formula 2)
Formula 1:
A
c={[(T
i-env-27)×1.5+100]+0.9×(T
o-env-35)}/100
Formula 2:
Q
c is total=∑ (Q
volume in* Ac)
According to the embodiment of the present invention, the total capacity requirements of air-conditioner set is obtained by the temperature computation of the running environment based on air-conditioner set, so that adjust to this total capacity requirements the fan-out capability obtaining air-conditioner set, thus ensure that the stability of Properties of Air-conditioning Unit further, meet the cooling and warming demand of user.
Step S204, by the total capacity requirements of the power of photovoltaic and the current system pressure value adjusting air conditioning group of air-conditioner set, obtains the service ability value of air-conditioner set.
Sample air-conditioner set current system pressure value and after getting the power of photovoltaic and the total capacity requirements of air-conditioner set, can be regulated by the total capacity requirements of power to air-conditioner set of current system pressure value and photovoltaic, obtain the service ability value of air-conditioner set; Also can be first regulated by the total capacity requirements of current system pressure value to air-conditioner set, then by the power of photovoltaic, adjustment result be regulated further, obtain the service ability value of final air-conditioner set.
Step S205, confirms the fan-out capability of air-conditioner set from service ability value.
Particularly, after the service ability value obtaining air-conditioner set, it can be the fan-out capability determining the reality of air-conditioner set from this ability runtime value.
Step S206, confirms by the service ability value of air-conditioner set the quantity needing the outer machine unit opened in air-conditioner set.
After the service ability value obtaining air-conditioner set, can based on the quantity needing the outer machine unit opened in the service ability value adjustment air-conditioner set of air-conditioner set.Wherein, outer machine unit can be called outer machine module, and multiple outdoor machine of air-conditioner unit can be combined into an outdoor machine of air-conditioner system, can be needed the quantity of the outer machine module of opening by the fan-out capability of air-conditioner set from outdoor machine of air-conditioner system validation.
Preferably, after step S206, the control method of photovoltaic power supply air-conditioner set also comprises: the quantity of the outer machine unit opened as required and the service ability value of air-conditioner set control the frequency needing the compressor opened in air-conditioner set.
Particularly, after can being the start demand of reception user, detect the quantity of current air-conditioner set China and foreign countries machine unit, when only having an outer machine unit in air-conditioner set, then directly according to the demand of air-conditioner set, the frequency of compressor can be controlled by control logics such as compressor capacity control algolithms.When the outer machine unit having multiple outer machine unit the service ability value of air-conditioner set can be distributed to unlatching according to the sequencing opened in air-conditioner set, know till distributing, then the ability be assigned to is controlled the frequency of compressor by each outer machine unit according to control logic, thus controls the power of compressor.
According to the embodiment of the present invention, the quantity of the outer machine unit opened as required and the service ability value of air-conditioner set control the frequency needing the compressor opened in air-conditioner set, thus ensure the peak use rate that the real output of photovoltaic DC-to-AC converter exports, realize energy-conservation while, ensure the stable output of air-conditioner set.
Preferably, step S206 can also comprise: the start demand order obtaining current outer machine unit, and the order of start demand is for opening outer machine unit.The order of start demand can be the order that user inputs as required, and user can control by the order of input start demand the quantity needing the outer machine unit opened.The unlatching quantity needing the outer machine unit opened is determined based on the order of start demand.After getting outer machine unit power-on command, based on this power-on command using the service ability value of air-conditioner set as judgement basis, open the outer machine unit of respective numbers.
After step S206, the control method of photovoltaic power supply air-conditioner set can also detect based on the order of start demand the unlatching quantity needing the outer machine unit opened.Detecting and need the quantity of the outer machine unit opened can be detect from the start demand order of user's input the quantity needing the outer machine unit opened, also can be the quantity detecting air-conditioner set China and foreign countries machine unit.
Wherein, the quantity of the outer machine unit opened as required and the service ability value of air-conditioner set control to need the frequency of the compressor opened to comprise in air-conditioner set:
If detect the outer machine unit of unlatching one, then control by the service ability value of air-conditioner set the frequency needing the compressor opened.Particularly, can be if only have an outer machine unit in air-conditioner set, then directly can be controlled the frequency of compressor by control logic according to unit, because the power of the frequency compression machine of compressor has certain relation, the frequency therefore by controlling compressor can control the power of compressor.
If detect and open multiple outer machine unit, then the service ability value of air-conditioner set is distributed in order the outer machine unit of unlatching, the outer machine unit being assigned to service ability value controls to need the frequency of the compressor opened according to the ability value of compressor.Particularly, if detect in current air-conditioner set when having multiple outer machine unit, then the service ability value of air-conditioner set can be distributed to the outer machine unit of unlatching according to the opening sequence of outer machine unit, until distribute.Then the frequency of capability control compressor that will be assigned to of each outer machine unit opened.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a control method for photovoltaic power supply air-conditioner set, is characterized in that, comprising:
Be retrieved as the real output of the photovoltaic DC-to-AC converter that air-conditioner set is powered;
The fan-out capability of described air-conditioner set is determined by the real output of described photovoltaic DC-to-AC converter; And
Fan-out capability based on described air-conditioner set adjusts in described air-conditioner set the quantity needing the outer machine unit opened.
2. the control method of photovoltaic power supply air-conditioner set according to claim 1, it is characterized in that, after the real output being retrieved as the photovoltaic DC-to-AC converter that air-conditioner set is powered, described control method also comprises: the current system pressure value of described air-conditioner set of sampling, wherein
Determine that the fan-out capability of described air-conditioner set comprises by the real output of described photovoltaic DC-to-AC converter: the total capacity requirements obtaining described air-conditioner set; Regulated the total capacity requirements of described air-conditioner set by the power of described photovoltaic and the current system pressure value of described air-conditioner set, obtain the service ability value of described air-conditioner set; The fan-out capability of described air-conditioner set is determined from described service ability value,
Fan-out capability based on described air-conditioner set adjusts in described air-conditioner set needs the quantity of the outer machine unit opened to comprise: the quantity being confirmed the described outer machine unit needing in described air-conditioner set to open by the service ability value of described air-conditioner set.
3. the control method of photovoltaic power supply air-conditioner set according to claim 2, is characterized in that, the total capacity requirements obtaining air-conditioner set comprises:
The temperature of the current operating environment of outer machine unit described in the temperature of the current operating environment of machine unit and described air-conditioner set in obtaining in described air-conditioner set;
The capacity factor of described interior machine unit is obtained by the temperature computation of the temperature of the current operating environment of described interior machine unit and the current operating environment of described outer machine unit;
Obtain the rated capacity of machine unit in described in described air-conditioner set; And
The total capacity requirements of described air-conditioner set is calculated by the rated capacity of described interior machine unit and the capacity factor of described interior machine unit.
4. the control method of photovoltaic power supply air-conditioner set according to claim 2, it is characterized in that, after the service ability value by described air-conditioner set confirms the quantity of the outer machine unit needing unlatching in described air-conditioner set, described control method also comprises: the quantity of described outer machine unit of opening as required and the service ability value of described air-conditioner set control the frequency needing the compressor opened in described air-conditioner set.
5. the control method of photovoltaic power supply air-conditioner set according to claim 4, is characterized in that,
Confirmed that by the service ability value of described air-conditioner set the quantity of the outer machine unit needing in described air-conditioner set to open comprises: the start demand order obtaining current described outer machine unit, the order of described start demand is for opening described outer machine unit; The unlatching quantity of the described outer machine unit needing to open is determined based on the order of described start demand,
After the service ability value by described air-conditioner set confirms the quantity of the outer machine unit needing unlatching in described air-conditioner set, described control method also comprises: the quantity detecting the described outer machine unit that needs are opened based on described start demand order,
The quantity of described outer machine unit of opening as required and the service ability value of described air-conditioner set control to need the frequency of the compressor opened to comprise in described air-conditioner set: if detect the described outer machine unit of unlatching one, then control the described frequency needing the compressor opened by the service ability value of described air-conditioner set; If detect and open multiple described outer machine unit, then the service ability value of described air-conditioner set is distributed in order the described outer machine unit of unlatching, the described outer machine unit being assigned to described service ability value controls the described frequency needing the compressor opened according to the ability value of described compressor.
6. a control device for photovoltaic power supply air-conditioner set, is characterized in that, comprising:
Acquiring unit, for being retrieved as the real output of the photovoltaic DC-to-AC converter that air-conditioner set is powered;
Determining unit, for determining the fan-out capability of described air-conditioner set by the real output of described photovoltaic DC-to-AC converter; And
Adjustment unit, for adjusting in described air-conditioner set the quantity needing the outer machine unit opened based on the fan-out capability of described air-conditioner set.
7. the control device of photovoltaic power supply air-conditioner set according to claim 6, is characterized in that, described control device also comprises: sampling unit, for the current system pressure value of described air-conditioner set of sampling, wherein,
Described determining unit comprises: the first acquisition module, for obtaining the total capacity requirements of described air-conditioner set; Adjustment module, for being regulated the total capacity requirements of described air-conditioner set by the power of described photovoltaic and the current system pressure value of described air-conditioner set, obtains the service ability value of described air-conditioner set; First determination module, for determining the fan-out capability of described air-conditioner set from described service ability value,
Described adjustment unit is also for confirming the quantity needing the described outer machine unit opened in described air-conditioner set by the service ability value of described air-conditioner set.
8. the control device of photovoltaic power supply air-conditioner set according to claim 7, is characterized in that, described first acquisition module comprises:
First obtains submodule, for the temperature of the current operating environment of outer machine unit described in the temperature of the current operating environment of machine unit in obtaining in described air-conditioner set and described air-conditioner set;
First calculating sub module, the temperature computation for the temperature of the current operating environment by described interior machine unit and the current operating environment of described outer machine unit obtains the capacity factor of described interior machine unit;
Second obtains submodule, for obtaining the rated capacity of machine unit in described in described air-conditioner set; And
Second calculating sub module, for being calculated the total capacity requirements of described air-conditioner set by the rated capacity of described interior machine unit and the capacity factor of described interior machine unit.
9. the control device of photovoltaic power supply air-conditioner set according to claim 7, it is characterized in that, described control device also comprises: control unit, for confirm to need in described air-conditioner set the outer machine unit opened in the service ability value by described air-conditioner set quantity after, the quantity of described outer machine unit of opening as required and the service ability value of described air-conditioner set control the frequency needing the compressor opened in described air-conditioner set.
10. the control device of photovoltaic power supply air-conditioner set according to claim 9, is characterized in that,
Described adjustment unit comprises: the second acquisition module, and for obtaining the start demand order of current described outer machine unit, the order of described start demand is for opening described outer machine unit; Second determination module, for determining the quantity needing the described outer machine unit opened based on the order of described start demand,
Described control device also comprises: detecting unit, for confirm to need in described air-conditioner set the outer machine unit opened in the service ability value by described air-conditioner set quantity after, detect the quantity needing the described outer machine unit opened,
Described control unit comprises: the first control module, for when detecting a unlatching described outer machine unit, controls the described frequency needing the compressor opened by the service ability value of described air-conditioner set; Second control module, for when detecting the multiple described outer machine unit of unlatching, the service ability value of described air-conditioner set is distributed in order the described outer machine unit of unlatching, the described outer machine unit being assigned to described service ability value controls the described frequency needing the compressor opened according to the ability value of described compressor.
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