CN104362612A - Power supply system of air conditioner and family micro grid system based on photovoltaic power supply - Google Patents
Power supply system of air conditioner and family micro grid system based on photovoltaic power supply Download PDFInfo
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- CN104362612A CN104362612A CN201410567887.2A CN201410567887A CN104362612A CN 104362612 A CN104362612 A CN 104362612A CN 201410567887 A CN201410567887 A CN 201410567887A CN 104362612 A CN104362612 A CN 104362612A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/12—Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a power supply system of an air conditioner. The air conditioner comprises a direct current load and an alternating current load. The power supply system of the air conditioner comprises a direct current power supply device and an alternating current power supply device, wherein the direct current power supply device comprises a photovoltaic array and a direct current converter, the direct current converter is used to convert direct current electricity output by the photovoltaic array into load electricity so as to supply the electricity to the direct current load, and the alternating current power supply device is used to supply electricity for the alternating current load. The power supply system of the air conditioner can guarantee electricity supply for the air conditioner, saves the electricity and energy, and meets demands of a user. The invention further provides a family micro grid system based on photovoltaic power supply.
Description
Technical field
The present invention relates to technical field of electric appliances, particularly a kind of electric power system of air conditioner, and based on family's micro-grid system of photovoltaic power supply.
Background technology
Air conditioner is one of major electrical equipment in household electricity, when user's using air-condition device, the electric energy of consumption and the electricity charge of payment be far longer than not using air-condition device time, therefore, people urgently wish that air conditioner can power and energy saving.In addition, what air conditioner generally adopted at present is civil power, such as direct current varied-frequency air conditioner, needs to adopt the civil power exchanged, thus extra rectification circuit and circuit of power factor correction is needed, alternating current is converted to direct current, then DC power transmission is used to air conditioner, because the conversion links of electric energy process is more, loss is larger, so, not only increase the cost of air conditioner, also reduce the utilance of electric energy.
Summary of the invention
Object of the present invention is intended to solve one of above-mentioned technical problem at least to a certain extent.For this reason, the present invention needs the electric power system proposing a kind of air conditioner, and this electric power system can ensure air conditioner electricity consumption, and power and energy saving, meet consumers' demand.
Of the present invention a kind of family's micro-grid system based on photovoltaic power supply is also proposed.
For solving the problem, one aspect of the present invention embodiment proposes a kind of electric power system of air conditioner, described air conditioner comprises DC load and AC load, described electric power system comprises: DC power supply apparatus, described DC power supply apparatus comprises photovoltaic array and DC converter, and described DC converter is used for that the direct current that described photovoltaic array exports is converted to load electricity consumption and thinks that described DC load is powered; AC power supply device, for powering for described AC load.
According to the electric power system of the air conditioner of the embodiment of the present invention, the DC load of air conditioner is respectively and AC load is powered by DC power supply apparatus and AC power supply device, namely alternating current-direct current is powered respectively, wherein, directly DC load is powered at by DC power supply apparatus, thus save in correlation technique extra the setting such as the rectifying part adopting AC-powered DC load, reduce power supply cost, direct current is provided by adopting photovoltaic array, thus the power consumption of existing employing mains-supplied can be saved, and then reduce user power utilization defrayment.
In some embodiments of the invention, wherein, described DC load comprises first kind DC load and Equations of The Second Kind DC load, described DC converter comprises: booster converter, direct current for being exported by photovoltaic array carries out boosting and exports the direct current after boosting to first DC bus, thinks that described first kind DC load is powered; For the direct current on described first DC bus being carried out step-down and the direct current after step-down being exported to the second DC bus, buck converter, thinks that described Equations of The Second Kind DC load is powered.
Wherein, described booster converter adopts maximum power point tracking MPPT (the Maximum Power PointTracking) power stage of mode to described photovoltaic array to control.
Can ensure that photovoltaic array is with maximum power output.
Particularly, described buck converter comprises: power switching modules, and described power switching modules is connected with described first DC bus, and described power switching modules comprises: the first control module; First power switch, the control end of described first power switch is connected with described first control module, and the first end of described first power switch is connected with the positive terminal of described first DC bus; Second power switch, the control end of described second power switch is connected with described first control module, the first end of described second power switch is connected with the second end of described first power switch, second end of described second power switch is connected with the negative pole end of described first DC bus, has first node between the second end of described first power switch and the first end of described second power switch; 3rd power switch, the control end of described 3rd power switch is connected with described first control module, and the first end of described 3rd power switch is connected with the positive terminal of described first DC bus; 4th power switch, the control end of described 4th power switch is connected with described first control module, the first end of described 4th power switch is connected with the second end of described 3rd power switch, second end of described 4th power switch is connected with the negative pole end of described first DC bus, has Section Point between the second end of described 3rd power switch and the first end of described 4th power switch; Transformer module, described transformer module comprises primary coil and secondary coil, and the number of turn of described secondary coil is less than the number of turn of described primary coil, wherein, one end of described primary coil is connected with described first node, and the other end of described primary coil is connected with described Section Point; Rectification output module, described rectification output module comprises: the first diode, and one end of described first diode is connected with the positive terminal of described second DC bus; Second diode, one end of described second diode is connected with the other end of described first diode, the other end of described second diode is connected with the negative pole end of described second DC bus, have the 3rd node between one end of described second diode and the other end of described first diode, described 3rd node is connected with one end of described secondary coil; 3rd diode, one end of described 3rd diode is connected with the positive terminal of described second DC bus; 4th diode, one end of described 4th diode is connected with the other end of described 3rd diode, the other end of described 4th diode is connected with the negative pole end of described second DC bus, have the 4th node between one end of described 4th diode and the other end of described 3rd diode, described 4th node is connected with the other end of described secondary coil.
Particularly, in some embodiments of the invention, described AC power supply device can be mains power supply, to ac bus, output AC electricity in described mains power supply thinks that described AC load is powered.
In addition, in some embodiments of the invention, described AC power supply device comprises: photovoltaic DC-to-AC converter, thinks that described AC load is powered for the DC inverter on described first DC bus being alternating current and the alternating current after inversion being exported to ac bus.
By the DC inverter that exported by photovoltaic array for alternating current directly provides alternating current, thus go for the area not having civil power.
Particularly, described photovoltaic DC-to-AC converter comprises: the first electric capacity, and one end of described first electric capacity is connected with the positive terminal of described first DC bus, and the other end of described first electric capacity is connected with the negative pole end of described first DC bus; Inverter bridge module, described inverter bridge module comprises: the second control module; 5th power switch, the control end of described 5th power switch is connected with described second control module, and the first end of described 5th power switch is connected with the positive terminal of described first DC bus; 6th power switch, the control end of described 6th power switch is connected with described second control module, the first end of described 6th power switch is connected with the second end of described 5th power switch, second end of described 6th power switch is connected with the negative pole end of described first DC bus, has the 5th node between the second end of described 5th power switch and the first end of described 6th power switch; 7th power switch, the control end of described 7th power switch is connected with described second control module, and the first end of described 7th power switch is connected with the positive terminal of described first DC bus; 8th power switch, the control end of described 8th power switch is connected with described second control module, the first end of described 8th power switch is connected with the second end of described 7th power switch, second end of described 8th power switch is connected with the negative pole end of described first DC bus, has the 6th node between the second end of described 7th power switch and the first end of described 8th power switch; Filter module, described filter module comprises the second electric capacity and inductance, and one end of described inductance is connected with described 5th node, and one end of described second electric capacity is connected with the other end of described inductance, and the other end of described second electric capacity is connected with described 6th node; Transformer module, described transformer module comprises primary coil and secondary coil, wherein, one end of described primary coil is connected with one end of described second electric capacity and the other end of described inductance respectively, the other end of described primary coil is connected with the other end of described second electric capacity, and described secondary coil is connected with described ac bus.
In some embodiments of the invention, described electric power system also comprises: batteries and charging-discharging controller, and described charging-discharging controller controls described batteries according to the electricity of the operating state of described photovoltaic array and described batteries and carries out discharge and recharge.
In some embodiments of the invention, described photovoltaic array is multiple, and described electric power system also comprises: header box, and the direct current for being exported by multiple photovoltaic array is collected to described first DC bus.
Based on the electric power system of the air conditioner of above-mentioned aspect embodiment, another aspect of the present invention embodiment proposes a kind of family's micro-grid system based on photovoltaic power supply, and this family's micro-grid system comprises: the electric power system of the air conditioner described in above-mentioned aspect embodiment; And DC electric apparatus and ac electric apparatus, described DC electric apparatus is powered by DC power supply apparatus, and described ac electric apparatus is powered by AC power supply device.
According to the family's micro-grid system based on photovoltaic power supply of the embodiment of the present invention, DC electric apparatus in family is respectively and ac electric apparatus is powered by the DC power supply apparatus in the electric power system of the air conditioner in above-mentioned aspect embodiment and AC power supply device, the electricity consumption making photovoltaic power supply not only can meet air conditioner can also be powered for other DC electric apparatus in family and ac electric apparatus, thus expand the function and efficacy of photovoltaic power supply, the need for electricity of different electrical equipment can be met.
In some embodiments of the invention, described DC electric apparatus comprises first kind DC electric apparatus and Equations of The Second Kind DC electric apparatus, and wherein, described first kind DC electric apparatus is connected with the first DC bus by the first direct current jack; Described Equations of The Second Kind DC electric apparatus is connected with the second DC bus by the second direct current jack.
Particularly, described second direct current jack is USB jack structure, and described second direct current jack is built-in type jack structure.
In addition, described ac electric apparatus is connected with ac bus by AC socket.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the block diagram of the electric power system of air conditioner according to an embodiment of the invention;
Fig. 2 is the schematic diagram of the family's micro-grid system according to a specific embodiment of the present invention;
Fig. 3 is the circuit diagram of the electric power system mesolow converter of air conditioner according to another specific embodiment of the present invention;
Fig. 4 is the schematic diagram of the family's micro-grid system according to another specific embodiment of the present invention;
Fig. 5 is the circuit diagram of the photovoltaic DC-to-AC converter according to another specific embodiment of the present invention;
Fig. 6 is the block diagram of the family's micro-grid system based on photovoltaic power supply according to an embodiment of the invention; And
Fig. 7 is the schematic diagram of the wiring board side by side according to a specific embodiment AC socket of the present invention and direct current jack.
Reference numeral
Electric power system 1000, DC power supply apparatus 200 and AC power supply device 300, photovoltaic array 201 and DC converter 202, boost converter 2021 and step-down controller 2022, power switching modules 01, transformer module 02 and rectification output module 03, photovoltaic DC-to-AC converter 301, first electric capacity C1, inverter bridge module 04, filter module 05 and transformer module 06, first DC bus 1, second DC bus 2 and ac bus 3, first controller 010 and the second control module 041, second electric capacity C2 and inductance L, batteries 400 and charging-discharging controller 500, header box 600, family's micro-grid system 2000, DC electric apparatus 3000 and ac electric apparatus 4000, first direct current jack 3100, second direct current jack 3200 and AC socket 4100, the panel 5000 of AC socket 4100 and the panel 6000 of direct current jack.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
With reference to description below and accompanying drawing, these and other aspects of embodiments of the invention will be known.Describe at these and in accompanying drawing, specifically disclose some particular implementation in embodiments of the invention, representing some modes of the principle implementing embodiments of the invention, but should be appreciated that the scope of embodiments of the invention is not limited.On the contrary, embodiments of the invention comprise fall into attached claims spirit and intension within the scope of all changes, amendment and equivalent.
The electric power system of air conditioner and the family's micro-grid system based on photovoltaic power supply that propose according to the embodiment of the present invention are described with reference to the accompanying drawings.
First the electric power system of the air conditioner of the embodiment of the present invention is described.Fig. 1 is the block diagram of the electric power system of air conditioner according to an embodiment of the invention, wherein, air conditioner 100 comprises DC load 101 and AC load 102, such as, DC load 101 can comprise such as DC frequency-changeable compressor 13, controller 15, and AC load 102 such as can comprise indoor fan 11 and outdoor fan 12.
As shown in Figure 1, the electric power system 1000 of the air conditioner of one embodiment of the present of invention comprises DC power supply apparatus 200 and AC power supply device 300.
DC power supply apparatus 200 comprises photovoltaic array 201 and DC converter 202.In practice, photovoltaic array 201 can be arranged on roof, be responsible for transform light energy as electric energy is to provide direct current, DC converter 202 is converted to load electricity consumption for the direct current exported by photovoltaic array 201 and thinks that the DC load 101 of air conditioner 100 is powered, such as, for the compressor of air conditioner 100, controller are powered.Wherein, the direct current that the direct current that photovoltaic array 201 exports can be converted to different voltage by DC converter 202 thinks that different DC load 101 is powered.
Particularly, direct current supply can be carried out by multiple photovoltaic array 201, such as, as shown in Figure 2, photovoltaic array 201 is installed on the inclined-plane on roof respectively, completes opto-electronic conversion, and then by direct current transducer 202, the low-voltage DC that photovoltaic array 201 exports is converted to each DC load 101 required voltage of air conditioner 100, thus realizes the power supply to DC load 101.
The AC load 102 such as indoor fan 11 and outdoor fan 12 of air conditioner 100 can be powered by AC power supply device 300.Such as, shown in Fig. 2, the indoor fan 11 of air conditioner 100 and outdoor fan 12 directly adopt electric main to power.
Can find out, the electric power system 1000 of the air conditioner of the embodiment of the present invention, the AC and DC of air conditioner 100 is powered and provides respectively, the direct power supply of the DC load 101 to air conditioner 100 is realized by photovoltaic array 201 and direct current transducer 202, without the need to extra rectifying conversion link and/or power supply adaptor, thus the cost of air conditioner 100 power supply can be reduced, in addition, the power supply of DC load 101 is provided by photovoltaic array 201, and then can reduce the electricity charge of user's payment.
Further, the DC load 101 of air conditioner 100 can comprise first kind DC load and Equations of The Second Kind DC load, wherein, can think that the supply power voltage of first kind DC load is greater than the supply power voltage of Equations of The Second Kind DC load.And then direct current transducer 202 comprises boost converter 2021 and step-down controller 2022.Boost converter 2021 carries out boosting for the direct current exported by photovoltaic array 201 and exports the direct current after boosting to first DC bus 1, think that first kind DC load is powered, such as, DC frequency-changeable compressor 13 is the main high voltage direct current loads of air conditioner 100, direct current after boosting directly can be provided to DC frequency-changeable compressor 13, as in Fig. 2, the DC frequency-changeable compressor 13 of air conditioner 100 is directly connected with the first DC bus 1.Buck converter 2022 is for carrying out step-down by the direct current on the first DC bus 1 and exporting the direct current after step-down to second DC bus 2, think that Equations of The Second Kind DC load is powered, such as, in Fig. 2, the controller 15 of air conditioner 100 is low-voltage direct load, controller 15 is directly connected with the second DC bus 2, thus the direct current after step-down directly can be powered for controller 15.Be understandable that, the demand that the direct current that photovoltaic array 201 exports can be converted to corresponding load by direct current transducer 202 by the DC load 101 in air conditioner 100 is powered and is directly supplied to load, and without the need to being provided to DC load 101 by taking electric main to be converted to direct current again.
Wherein, when carrying out opto-electronic conversion by multiple photovoltaic array 201, booster converter 2021 adopts the power stage of multichannel maximum power point tracking MPPT mode to photovoltaic array 201 to control respectively, effectively can improve the power stage of the photovoltaic array 201 being positioned at different inclined-plane, make photovoltaic array 201 all can work in respective maximum power point, avoid shadow effect.
Wherein, step-down controller 2022 has the effect of electrical isolation, can adopt the direct current transformational structure of the full-bridge DC/DC with transformer, in one particular embodiment of the present invention, as shown in Figure 3, be the structural representation of the step-down controller 2022 of a specific embodiment according to the present invention.Step-down controller 2022 comprises power switching modules 01, transformer module 02 and rectification output module 03.
Power switching modules 01 is connected with the first DC bus 1, power switching modules 01 comprises the first control module 010, first power switch Q1, the second power switch Q2, the 3rd power switch Q3 and the 4th power switch 04, first power switch Q1 connects with the second power switch Q2,3rd power switch Q3 and the 4th power switch Q4 connects, and then two groups of power switchs are in parallel again.Particularly, the control end of the first power switch Q1 is connected with the first control module 010, and the first end of the first power switch Q1 is connected with the positive terminal of the first DC bus 1; The control end of the second power switch Q2 is connected with the first control module 010, the first end of the second power switch Q2 is connected with second end of the first power switch Q1, second end of the second power switch Q2 is connected with the negative pole end of the first DC bus 1, has first node O1 between second end of the first power switch Q1 and the first end of the second power switch Q2; The control end of the 3rd power switch Q3 is connected with the first control module 010, and the first end of the 3rd power switch Q3 is connected with the positive terminal of the first DC bus 1; The control end of the 4th power switch Q4 is connected with the first control module 010, the first end of the 4th power switch Q4 is connected with second end of the 3rd power switch Q3, second end of the 4th power switch Q4 is connected with the negative pole end of the first DC bus 1, has Section Point O2 between second end of the 3rd power switch Q3 and the first end of the 4th power switch Q4.
Transformer module 02 comprises primary coil T11 and secondary coil T12, and the number of turn of secondary coil T12 is less than the number of turn of primary coil T11, and such as, the turn ratio of primary coil T11 and secondary coil T12 is n:1, n>1.Wherein, one end of primary coil T11 is connected with first node O1, and the other end of primary coil T12 is connected with Section Point O2.
Rectification output module 03 comprises the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, wherein, first diode D1 and the second diode D2 connects, and the 3rd diode D3 and the 4th diode D4 connects, then two groups of diodes in parallel engineer outputting circuit.Particularly, one end of the first diode D1 is connected with the positive terminal of the second DC bus 2; One end of second diode D2 is connected with the other end of the first diode D1, the other end of the second diode D2 is connected with the negative pole end of the second DC bus 2, have the 3rd node O3 between one end of second diode D2 and the other end of the first diode D1, the 3rd node O3 is connected with one end of secondary coil T12; One end of 3rd diode D3 is connected with the positive terminal of the second DC bus 2; One end of 4th diode D4 is connected with the other end of the 3rd diode D3, the other end of the 4th diode D4 is connected with the negative pole end of the second DC bus 2, have the 4th node O4 between one end of 4th diode D4 and the other end of the 3rd diode D3, the 4th node O4 is connected with the other end of secondary coil T12.
Can find out, the primary coil T11 of transformer module 02 is connected with the neutral point of two groups of series power switch respectively, and secondary coil T12 is connected with the neutral point of two groups of diodes of series connection respectively.
Particularly, the input voltage of step-down controller 2022 is the high-voltage dc voltage Uin on the first DC bus 1, complementary two-way PWM (Pulse width Modulation is driven by the first control module 010, pulse-width modulation) ripple signal, control the break-make of power switch respectively, direct current is converted to high-frequency alternating current, through transformer module 02, high-frequency alternating current is converted to the high-frequency alternating current of low pressure again, eventually pass the rectification output module 03 be made up of four diodes to be transformed to direct current Uout and to export, the conversion process that an orthogonal is straight can be thought.It should be noted that in the PWM ripple signal of the two-way complementation that the first control module 010 exports and will add Dead Time, cause short trouble with conducting while preventing upper and lower two power switchs (Q1 and Q2 or Q3 and Q4) of same brachium pontis.The voltage transmission ratio of this buck converter 2022 can be expressed as: Uout=(D/n) * Uin, wherein, n is the turn ratio of transformer module 02 primary coil T11 and secondary coil T12, and D is the duty ratio of PWM ripple, such as, 0<D<0.5.Because there is the existence of transformer module 02, make buck converter 2022 have the effect of electrical isolation, achieve two the different voltage level buses i.e. isolation of the first DC bus 1 and the second DC bus 2, improve the fail safe of system.
In the electric power system 1000 of the air conditioner of the embodiment of the present invention, the AC load 102 being air conditioner 100 by AC power supply device 300 is powered, in the place having civil power, AC power supply device 300 can be mains power supply, as shown in Figure 2, mains power supply exports industrial-frequency alternating current to ac bus 3 and thinks that AC load 102 is powered, such as, the indoor fan 11 of air conditioner 100 is connected with ac bus 3 with outdoor fan 12, and indoor fan 11 and outdoor fan 12 directly adopt electric main.
In addition, the place of electrical network can not adopted, the Li Island such as not having electrical network to set up or the remote mountain areas of power shortage, the direct current on the first DC bus 1 can be converted to alternating current, and then power for AC load 102.In one embodiment of the invention, as shown in Figure 4, AC power supply device 300 comprises photovoltaic DC-to-AC converter 301, for the DC inverter on the first DC bus 1 being alternating current and the alternating current after inversion being exported to ac bus 2, photovoltaic DC-to-AC converter 301 thinks that AC load 102 is powered.
That is, when there being civil power, the DC power supply apparatus 200 of electric power system 1000 provides direct current by photovoltaic array 201 and direct current transducer 202, AC portion is provided by AC power supply device 300 i.e. civil power, thus the link of inversion can be reduced, both improve the reliability of system, turn improve the utilance of electric energy, because the electric energy conversion links of process is more, electric energy loss is larger.And do not having civil power to deposit in case, then increase inversion link, to meet the power demands of AC load 102.
Further, as shown in Figure 5, photovoltaic DC-to-AC converter 301 can adopt the inverter structure of full-bridge DC/AC.Photovoltaic DC-to-AC converter 301 comprises the first electric capacity C1, inverter bridge module 04, filter module 05 and transformer module 06.
One end of first electric capacity C1 is connected with the positive terminal of the first DC bus 1, the other end of the first electric capacity C1 is connected with the negative pole end of the first DC bus 1, namely the first electric capacity C1 such as decoupling capacitance is connected in parallel on input, ripple on the first DC bus 1 can be reduced, and then reduce the THD (Total HarmonicDistortion, total harmonic distortion) of photovoltaic DC-to-AC converter 301 output current.
Inverter bridge module 04 comprises the second control module 041, the 5th power switch Q5, the 6th power switch Q6, the 7th power switch Q7 and the 8th power switch Q8, wherein, after 5th power switch Q5 is connected in parallel on decoupling capacitance C1 after connecting with the 6th power switch Q6 again, the 7th power switch Q7 and the 8th power switch Q8 is connected in parallel on the circuit of the 5th power switch Q5 and the 6th power switch Q6 composition after connecting after.Particularly, the control end of the 5th power switch Q5 is connected with the second control module 041, and the first end of the 5th power switch Q5 is connected with the positive terminal of the first DC bus 1; The control end of the 6th power switch Q6 is connected with the second control module 041, the first end of the 6th power switch Q6 is connected with second end of the 5th power switch Q5, second end of the 6th power switch Q6 is connected with the negative pole end of the first DC bus 1, has the 5th node O5 between second end of the 5th power switch Q5 and the first end of the 6th power switch Q6; The control end of the 7th power switch Q7 is connected with the second control module 041, and the first end of the 7th power switch Q7 is connected with the positive terminal of the first DC bus 1; The control end of the 8th power switch Q8 is connected with the second control module 041, the first end of the 8th power switch Q8 is connected with second end of the 7th power switch Q7, second end of the 8th power switch Q8 is connected with the negative pole end of the first DC bus 1, has the 6th node O6 between second end of the 7th power switch Q7 and the first end of the 8th power switch Q8.Second control module 041 obtains (Sinusoidal Pulse Width Modulation, sinusoidal pulse width modulation) signal by inquiry sine table, to drive the inverter bridge of four power switch compositions.
Filter module 05 comprises the second electric capacity C2 and inductance L, and one end of inductance L is connected with the 5th node O5, and one end of the second electric capacity C2 is connected with the other end of inductance L, and the other end of the second electric capacity C2 is connected with the 6th node O6.By the high order harmonic component filtering of filter module 05 by inverter bridge module 04 output current, wherein, the second electric capacity C2 and inductance L choose as follows: L
f>=(U
dcu
acη)/(0.3P
of
c), wherein Udc is the voltage on the first DC bus 1, and Uac is photovoltaic DC-to-AC converter 301 output voltage, and η is the efficiency of system, P
ofor power output, f
cfor the switching frequency of inverter bridge module 04 breaker in middle device, the second electric capacity C2 chooses the frequency depending on LC resonance
get f
sfor 15 times of fundamental frequency (50Hz), wherein, L
ffor the inductance parameters of inductance L, C
fit is the capacitance parameter of the second electric capacity C2.
Transformer module 06 comprises primary coil T21 and secondary coil T22, wherein, one end of primary coil T21 is connected with one end of the second electric capacity C2 and the other end of inductance L respectively, the other end of primary coil T21 is connected with the other end of the second electric capacity C2, secondary coil T22 is connected with ac bus 3, namely, the primary coil T21 of transformer module 06 is connected in parallel on the two ends of the second electric capacity C2, and secondary coil T22 is connected to the output of photovoltaic DC-to-AC converter 301.After transformer module 06 is connected to filter module 05, mainly play the effect of isolation first DC bus 1 and ac bus 3, improve security of system.
In addition, as shown in figures 2 or 4, in an embodiment of the present invention, electric power system 1000 also comprises batteries 400 and charging-discharging controller 500, and charging-discharging controller 500 carries out discharge and recharge according to the electricity control batteries 400 of the operating state of photovoltaic array 201 and batteries 400.Such as, time by day, photovoltaic array 201 can generate electricity, photovoltaic array 201 export electric energy be air conditioner 100 DC load 101 power while, charging-discharging controller 500 can obtain the power storage more than needed of photovoltaic array 201 output in batteries 400, until the electricity of batteries 400 reaches limit value, charging-discharging controller 500 controls batteries 400 and stops charging.When night, photovoltaic array 201 can not generate electricity, then charging-discharging controller 500 controls batteries 400 and discharges electric energy, thus ensures the power supply of DC load 101.
In addition, when photovoltaic array 201 is multiple, electric power system 1000 also comprises header box 600, and header box 600 is collected to the first DC bus 1 for the direct current exported by multiple photovoltaic array 201.Such as shown in Fig. 2 or Fig. 4, header box 600 is connected to the output of DC booster 2021, the direct current after boosting is converged into a road and exports the first DC bus 1 to.
Put it briefly, photovoltaic array 201 is connected with booster converter 2021, then by header box 600, electric energy output is converged into a road direct current to export, charging-discharging controller 500 and batteries 400 are connected in the output of header box 600, after first DC bus 1 is connected on header box 600 and batteries 400, ac bus 3 and the first DC bus 1 are isolated, when there being civil power, ac bus 3 is directly powered by civil power, if there is no civil power, then connect the first DC bus 1 and ac bus 3 by the photovoltaic DC-to-AC converter 301 of band isolation, the indoor fan of air conditioner 100 is connected with ac bus 3 with outdoor fan, air-conditioning DC frequency-changeable compressor is connected with the first DC bus 1, buck converter 2022 is connected between the first DC bus 1 and the second DC bus 2, the controller of air conditioner 100 is connected on the second DC bus 2, thus the power supply realized air conditioner 100.
In sum, according to the electric power system of the air conditioner of the embodiment of the present invention, the DC load of air conditioner is respectively and AC load is powered by DC power supply apparatus and AC power supply device, directly DC load is powered at by DC power supply apparatus, thus save in correlation technique extra the setting such as the rectifying part adopting AC-powered DC load, reduce power supply cost, direct current is provided by adopting photovoltaic array, thus the power consumption of existing employing mains-supplied can be saved, and then reduce the payment of demand charge.In addition, between bus, adopt electrical isolation, can Electrical Safety be ensured.
On the other hand, for the photovoltaic air-conditioning in correlation technique, the electricity generate function of photovoltaic cell is utilized directly to provide direct current to air conditioner, but current occurred PV air-conditioner, except the central air-conditioning of commercialization, general domestic air conditioning all power is general less, and photovoltaic cell quantity used is also very limited, only be confined in the use of air conditioner, do not give full play of the advantage of photovoltaic generation.In addition, household electricity is nearly all the alternating current of taking utility grid, but, similar with air conditioner, a lot of electrical equipment needs to use direct current often, such as, LED (Light Emitting Diode, light-emitting diode) lamp, various battery chargers etc., thus, this electric appliances just unavoidably has rectifier circuit peace ripple link or needs extra power supply adaptor, and this adds cost undoubtedly, also reduces efficiency.
In addition, the Li Island set up for not having electrical network or remote districts, normal household electricity all can be difficult to meet.Can find out, current domestic power system also exists following deficiency: (1), only in air conditioner, employ solar energy, does not make full use of the advantage of photovoltaic generation.(2), most household electricity takes electric main, also needs alternating current to be converted to direct current, additionally increases the electric cost of direct current supply electrical equipment.(3), the variation of household electricity, determine single interchange or direct current supply all not optimally meets its demand.(4), do not have the place of utility grid, the basic electricity of family has difficulties.
For above problem, based on the electric power system of the air conditioner of above-mentioned aspect embodiment, another aspect of the present invention embodiment proposes a kind of family's micro-grid system based on photovoltaic power supply.Below the family's micro-grid system based on photovoltaic power supply of the embodiment of the present invention is described.
Fig. 6 is the block diagram of the family's micro-grid system based on photovoltaic power supply according to an embodiment of the invention.As shown in Figure 6, the family's micro-grid system 2000 based on photovoltaic power supply of the embodiment of the present invention comprises the electric power system 1000 of the air conditioner of above-mentioned aspect embodiment, DC electric apparatus 3000 and ac electric apparatus 4000.
DC electric apparatus 3000 is powered by DC power supply apparatus.Particularly, as shown in figures 2 or 4, direct current is exported by DC power supply apparatus such as photovoltaic array, and then be converted to different voltage by DC converter and export DC bus to, pass through DC bus, part of direct current directly can be supplied to the DC load of air conditioner 100, and the DC electric apparatus 3000 in family also can connect different DC buss to obtain electric energy according to the power demands of self, meets the need of work of self.
Ac electric apparatus 4000 is powered by AC power supply device.Particularly, as shown in figures 2 or 4, ac bus 3 collects from AC power supply device such as mains power supply or the alternating current that obtained by photovoltaic DC-to-AC converter, a part directly can be supplied to the AC load such as indoor fan and outdoor fan of air conditioner, and another part can be supplied to other ac electric apparatus 4000 in family.
Be understandable that, in the remote mountain areas of the Li Island or electricity consumption difficulty that do not have civil power, similarly, the DC electric apparatus 3000 that can be family by the photovoltaic array of DC power supply apparatus is powered, and be that alternating current is collected to ac bus 3 by photovoltaic DC-to-AC converter by the DC inverter on the first DC bus 1, thus ensure the electricity consumption of ac electric apparatus 4000 in family, meet the need for electricity of user.
In one embodiment of the invention, as shown in Fig. 2 or 4, DC electric apparatus 3000 comprises first kind DC electric apparatus and Equations of The Second Kind DC electric apparatus, can think, the supply power voltage of first kind DC electric apparatus is greater than the supply power voltage of the second DC electric apparatus.Wherein, first kind DC electric apparatus is connected with the first DC bus 1 by the first direct current jack 3100; Equations of The Second Kind DC electric apparatus is connected with the second DC bus 2 by the second direct current jack 3200.Such as, first DC bus 1 and the second DC bus 2 collect the direct current of different voltage, first DC bus 1 can by connected first direct current jack 3100 for first kind DC electric apparatus be powered, and the second DC bus 2 can by connected second direct current jack 3200 for Equations of The Second Kind DC electric apparatus be powered.
Ac electric apparatus 4000 can be connected with ac bus 3 by AC socket 4100, and in other words, ac bus 3 can be powered for ac electric apparatus 4000 by connected AC socket 4100.As the schematic diagram that Fig. 7 is according to the direct current jack of a specific embodiment of the present invention and the patch panel of AC socket.It should be noted that, just exemplarily give the socket of a type in Fig. 7, in practical application, the number of socket can carry out suitable increase and decrease according to electrical equipment quantity.
Particularly, consider, Equations of The Second Kind DC electric apparatus and household low pressure electrical equipment substantially all have USB data line or power line, and, the Electrical Safety of first kind DC electric apparatus, in one particular embodiment of the present invention, the second direct current jack 3200 is USB jack structure, and the first direct current jack 3100 is built-in type jack structure.Such as shown in 7, the first direct current jack 3100 can be designed to bury cartridge type jack in high pressure, and the positive pole of direct voltage is connected on inner core, negative pole is connected on urceolus, these jacks all have fool-proof design, there will not be the thing mispluged, but also have the function of child-resistant electric shock.Wherein, the jack of AC socket 4100 can continue to use existing household AC jack.
Wherein, the panel 6000 of AC socket 4100 and the panel 5000 of direct current jack are installed side by side, family is facilitated to use, high-low pressure direct current has, the need for electricity of different voltage level household electrical appliance can be met, eliminate the equipment that the rectifier bridge stack and/or power supply adaptor etc. of existing household electrical appliance are extra.In addition, there is between each bus the effect of electrical equipment isolation, thus can ensure that user passes through socket Electrical Safety.
According to the family's micro-grid system based on photovoltaic power supply of the embodiment of the present invention, DC electric apparatus in family is respectively and ac electric apparatus is powered by the DC power supply apparatus in the electric power system of the air conditioner in above-mentioned aspect embodiment and AC power supply device, the electricity consumption making photovoltaic power supply not only can meet air conditioner can also be powered for other DC electric apparatus in family and ac electric apparatus, thus expand the function and efficacy of photovoltaic power supply, the need for electricity of different electrical equipment can be met.In addition, DC electric apparatus is directly connected with DC bus by direct current jack, thus to save in correlation technique by alternating current being converted to the extras such as galvanic rectification link and/or power supply adaptor, reduce cost, make DC electric apparatus electricity consumption convenient.In addition, there is between different buses electrical isolation effect, ensure Electrical Safety.Family's micro-grid system of the embodiment of the present invention, the DC inverter that can be provided by photovoltaic array by AC power supply device such as photovoltaic DC-to-AC converter is alternating current, so can solve the electricity consumption difficulty not having civil power area to a certain extent.
Each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (13)
1. an electric power system for air conditioner, is characterized in that, described air conditioner comprises DC load and AC load, and described electric power system comprises:
DC power supply apparatus, described DC power supply apparatus comprises photovoltaic array and DC converter, and described DC converter is used for that the direct current that described photovoltaic array exports is converted to load electricity consumption and thinks that described DC load is powered;
AC power supply device, for powering for described AC load.
2. the electric power system of air conditioner as claimed in claim 1, it is characterized in that, wherein, described DC load comprises first kind DC load and Equations of The Second Kind DC load, and described DC converter comprises:
Booster converter, the direct current for being exported by photovoltaic array carries out boosting and exports the direct current after boosting to first DC bus, thinks that described first kind DC load is powered;
For the direct current on described first DC bus being carried out step-down and the direct current after step-down being exported to the second DC bus, buck converter, thinks that described Equations of The Second Kind DC load is powered.
3. the electric power system of air conditioner as claimed in claim 2, is characterized in that, described booster converter adopts the power stage of maximum power point tracking MPPT mode to described photovoltaic array to control.
4. the electric power system of air conditioner as claimed in claim 2, it is characterized in that, described buck converter comprises:
Power switching modules, described power switching modules is connected with described first DC bus, and described power switching modules comprises:
First control module;
First power switch, the control end of described first power switch is connected with described first control module, and the first end of described first power switch is connected with the positive terminal of described first DC bus;
Second power switch, the control end of described second power switch is connected with described first control module, the first end of described second power switch is connected with the second end of described first power switch, second end of described second power switch is connected with the negative pole end of described first DC bus, has first node between the second end of described first power switch and the first end of described second power switch;
3rd power switch, the control end of described 3rd power switch is connected with described first control module, and the first end of described 3rd power switch is connected with the positive terminal of described first DC bus;
4th power switch, the control end of described 4th power switch is connected with described first control module, the first end of described 4th power switch is connected with the second end of described 3rd power switch, second end of described 4th power switch is connected with the negative pole end of described first DC bus, has Section Point between the second end of described 3rd power switch and the first end of described 4th power switch; Transformer module, described transformer module comprises primary coil and secondary coil, and the number of turn of described secondary coil is less than the number of turn of described primary coil, wherein, one end of described primary coil is connected with described first node, and the other end of described primary coil is connected with described Section Point;
Rectification output module, described rectification output module comprises:
First diode, one end of described first diode is connected with the positive terminal of described second DC bus;
Second diode, one end of described second diode is connected with the other end of described first diode, the other end of described second diode is connected with the negative pole end of described second DC bus, have the 3rd node between one end of described second diode and the other end of described first diode, described 3rd node is connected with one end of described secondary coil;
3rd diode, one end of described 3rd diode is connected with the positive terminal of described second DC bus;
4th diode, one end of described 4th diode is connected with the other end of described 3rd diode, the other end of described 4th diode is connected with the negative pole end of described second DC bus, have the 4th node between one end of described 4th diode and the other end of described 3rd diode, described 4th node is connected with the other end of described secondary coil.
5. the electric power system of air conditioner as claimed in claim 1, it is characterized in that, described AC power supply device is mains power supply, to ac bus, output AC electricity in described mains power supply thinks that described AC load is powered.
6. the electric power system of air conditioner as claimed in claim 2, it is characterized in that, described AC power supply device comprises:
For the DC inverter on described first DC bus being alternating current and the alternating current after inversion being exported to ac bus, photovoltaic DC-to-AC converter, thinks that described AC load is powered.
7. the electric power system of air conditioner as claimed in claim 6, it is characterized in that, described photovoltaic DC-to-AC converter comprises:
First electric capacity, one end of described first electric capacity is connected with the positive terminal of described first DC bus, and the other end of described first electric capacity is connected with the negative pole end of described first DC bus;
Inverter bridge module, described inverter bridge module comprises:
Second control module;
5th power switch, the control end of described 5th power switch is connected with described second control module, and the first end of described 5th power switch is connected with the positive terminal of described first DC bus;
6th power switch, the control end of described 6th power switch is connected with described second control module, the first end of described 6th power switch is connected with the second end of described 5th power switch, second end of described 6th power switch is connected with the negative pole end of described first DC bus, has the 5th node between the second end of described 5th power switch and the first end of described 6th power switch;
7th power switch, the control end of described 7th power switch is connected with described second control module, and the first end of described 7th power switch is connected with the positive terminal of described first DC bus;
8th power switch, the control end of described 8th power switch is connected with described second control module, the first end of described 8th power switch is connected with the second end of described 7th power switch, second end of described 8th power switch is connected with the negative pole end of described first DC bus, has the 6th node between the second end of described 7th power switch and the first end of described 8th power switch;
Filter module, described filter module comprises the second electric capacity and inductance, and one end of described inductance is connected with described 5th node, and one end of described second electric capacity is connected with the other end of described inductance, and the other end of described second electric capacity is connected with described 6th node;
Transformer module, described transformer module comprises primary coil and secondary coil, wherein, one end of described primary coil is connected with one end of described second electric capacity and the other end of described inductance respectively, the other end of described primary coil is connected with the other end of described second electric capacity, and described secondary coil is connected with described ac bus.
8. the electric power system of air conditioner as claimed in claim 1, it is characterized in that, described electric power system also comprises:
Batteries and charging-discharging controller, described charging-discharging controller controls described batteries according to the electricity of the operating state of described photovoltaic array and described batteries and carries out discharge and recharge.
9. the electric power system of air conditioner as claimed in claim 2, it is characterized in that, described photovoltaic array is multiple, and described electric power system also comprises:
Header box, the direct current for being exported by multiple photovoltaic array is collected to described first DC bus.
10., based on family's micro-grid system of photovoltaic power supply, it is characterized in that, comprising:
The electric power system of the air conditioner as described in any one of claim 1-9; And
DC electric apparatus and ac electric apparatus, described DC electric apparatus is powered by DC power supply apparatus, and described ac electric apparatus is powered by AC power supply device.
11. as claimed in claim 10 based on family's micro-grid system of photovoltaic power supply, and it is characterized in that, described DC electric apparatus comprises first kind DC electric apparatus and Equations of The Second Kind DC electric apparatus, wherein,
Described first kind DC electric apparatus is connected with the first DC bus by the first direct current jack;
Described Equations of The Second Kind DC electric apparatus is connected with the second DC bus by the second direct current jack.
12. as claimed in claim 11 based on family's micro-grid system of photovoltaic power supply, and it is characterized in that, described second direct current jack is USB jack structure, and described second direct current jack is built-in type jack structure.
13. as claimed in claim 10 based on family's micro-grid system of photovoltaic power supply, and it is characterized in that, described ac electric apparatus is connected with ac bus by AC socket.
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| CN107086462A (en) * | 2017-06-19 | 2017-08-22 | 浙江工贸职业技术学院 | A kind of switch cubicle |
| CN108931957A (en) * | 2018-08-22 | 2018-12-04 | 珠海格力电器股份有限公司 | Power supply method of air conditioner water chilling unit, air conditioner water chilling unit and air conditioner |
| CN109210655A (en) * | 2018-10-17 | 2019-01-15 | 珠海格力电器股份有限公司 | Air conditioning equipment and electric energy processing method for air conditioning equipment |
| CN110774995A (en) * | 2019-10-31 | 2020-02-11 | 广东美的制冷设备有限公司 | Power supply device of vehicle-mounted air conditioner and vehicle-mounted air conditioner |
| CN110774995B (en) * | 2019-10-31 | 2022-10-21 | 广东美的制冷设备有限公司 | Power supply device of vehicle-mounted air conditioner and vehicle-mounted air conditioner |
| CN112310966A (en) * | 2020-10-15 | 2021-02-02 | 珠海格力电器股份有限公司 | Photovoltaic energy storage air conditioner power supply system and control method thereof |
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Application publication date: 20150218 |