CN101876472B - Device and method for controlling solar air conditioner - Google Patents
Device and method for controlling solar air conditioner Download PDFInfo
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- CN101876472B CN101876472B CN2010101434438A CN201010143443A CN101876472B CN 101876472 B CN101876472 B CN 101876472B CN 2010101434438 A CN2010101434438 A CN 2010101434438A CN 201010143443 A CN201010143443 A CN 201010143443A CN 101876472 B CN101876472 B CN 101876472B
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Abstract
The invention relates to a device and a method for controlling a solar air conditioner. The device for controlling the solar air conditioner comprises an indoor solar air conditioner control device, an outdoor solar air conditioner control device, an outdoor power supply circuit, an indoor outdoor communication circuit and an outdoor communication circuit. The indoor solar air conditioner control device and the outdoor solar air conditioner control device respectively comprises a solar air conditioner control function unit, a shared energy-storage capacitor, a solar DC-DC boosting, isolating and exchanging device and a solar battery; the outdoor power supply circuit comprises a power switch, an EMC circuit and an outdoor DC high-voltage power supply which are respectively connected with the commercial power network; the outdoor DC high-voltage power supply, the output of the solar DC-DC boosting, isolating and exchanging device, the DC high-voltage power supply input of the indoor solar air conditioner control device and the DC high-voltage power supply input of the outdoor solar air conditioner control device are all directly connected with the shared energy-storage capacitor in parallel; the solar battery is connected with the solar DC-DC boosting, isolating and exchanging device; and the solar DC-DC boosting, isolating and exchanging device is connected with the indoor solar air conditioner control device and the outdoor solar air conditioner control device by the indoor outdoor communication circuit and the outdoor communication circuit.
Description
Technical field
The present invention relates to a bladder meridian connecting with nape can be in the control device and the control method thereof of the application technology of field of air conditioning, particularly a kind of solar air conditioner.
Background technology
Existing heliotechnics basically all is based on illumination, large-scale generation engineering; To the application of the power supply of air-conditioning also all is to convert direct current at secondary after being reverse into alternating current to solar energy, because more than once inversion, efficient is lower; Simultaneously need be synchronous with civil power, complicated circuit; Networking is not having the solar time result of use not good enough separately.
Chinese patent document number CN2665593Y discloses a kind of solar energy and electric main dual power supply air-conditioning system on December 2nd, 2004, and it comprises air-conditioning system body and power supply.Body comprises compressor, condenser, throttling arrangement, evaporimeter, pipeline, casing and electric control circuit.Power supply comprises solar panel and controller thereof, inversion boosting transformer, the control panel that is connected with controller, inversion boosting transformer, batteries, the change-over switch that is connected with the output of electric main power supply and inversion boosting transformer.The output of change-over switch is connected with body.Solar panel and controller thereof can have a plurality of parallel connections.The inversion boosting transformer comprises inversion module and boost module.Its complex structure, cost are higher, and energy loss is serious, is not easy to apply.
Summary of the invention
The object of the invention aims to provide a kind of simple and reasonable, link of utilizing of on the basis of existing air-conditioner, adding solar energy; Make solar energy clean energy resource is provided for the air-conditioner of common family expenses or other purposes; And the control device of the solar air conditioner that cost is low, efficient is high, easy to utilize and control method thereof, to overcome weak point of the prior art.
Press the control device of a kind of solar air conditioner of this purpose design; Comprise by air conditioner chamber's inner controller, air conditioner chamber's outer control device, outdoor power circuit and indoor and outdoor order circuit and forming; Air conditioner chamber's inner controller and outdoor control device comprise air-conditioning control functional unit, and its architectural feature is that air conditioner controlling device also comprises public storage capacitor C1 and solar energy DC-DC boost isolated variable device, solar cell; Outdoor power circuit comprises power switch, EMC circuit, the outdoor DC high-voltage power supply that is connected with city's point electrical network successively; The boost high-voltage DC power supply input of high-voltage DC power supply input and outdoor control device of output, Indoor Control Device of isolated variable device of the output of outdoor DC high-voltage power supply, solar energy DC-DC is all directly parallelly connected with storage capacitor C1; Air conditioner chamber's inner controller is not connected with utility grid, does not have rectification circuit, and its high voltage source is taken from outdoor storage capacitor C1; The high voltage source of air conditioner chamber's outer control device is also directly taken from outdoor storage capacitor C1; Outdoor solar cell and the solar energy DC-DC isolated variable device sequence that boosts is connected, and solar energy DC-DC boosts and is connected by an order circuit between isolated variable device and the air conditioner chamber outer control device.Because the power supply of general domestic air conditioner is all provided by indoor set, indoor set has the electric main power supply, and the handlebar alternating current is transformed to galvanic rectification circuit; Because solar cell generally all is installed in outdoorly, it is the thing that follows a well mapped-out plan that the DC-DC converter unit is placed on outdoor, so the present invention just provides and provide DC high-voltage power supply to indoor power supply by outdoor on scheme.
Said solar cell and solar energy DC-DC boost and also are connected with a line switching between the isolated variable device, in order to realize controlling manually the access of solar energy, the convenient use.
Said solar energy DC-DC boost the isolated variable device by communication interface unit, high voltage source high pressure isolate sampling unit, heterogeneous phase shift is isolated DC-DC converting means, current detecting unit, voltage detection unit and solar energy conversion control main control MCU (hereinafter to be referred as main control MCU) and is formed; Voltage detection unit detects the voltage of solar cell in real time, and output links to each other with main control MCU, to main control MCU the information of voltage of solar cell is provided, and supplies main control MCU to carry out DC-DC conversion usefulness, and this parameter is one of major parameter of DC-DC conversion participation transform operation; Current detecting unit is series at solar cell and heterogeneous phase shift isolates between the DC-DC converting means, and links to each other with main control MCU, in order to the total current of each phase of detection converting means; Also can use the scheme of the branch electric current that detects each phase; Its control method is the same, and is more accurate to the control meeting of each phase during just to minute Current Control, when using total current to control; Because the electric current handling capacity on each road is pre-set as required when conceptual design; They become the fixed proportion relation with total current, detect the branch electric current that total current can be calculated each road, detect and just obtain total current after the branch electric current gathers; High-voltage power voltage is isolated the voltage of DC high-voltage power supply outside the sampling unit sensing chamber; Output links to each other with main control MCU; Communication interface unit links to each other with the order circuit of air conditioner chamber's outer control device; And be connected with main control MCU, in order to carry out carrying out communication with air conditioner chamber outer control device, heterogeneous phase shift is isolated the DC-DC converting means and is linked to each other with main control MCU.
Said current detecting unit is series at solar cell and heterogeneous phase shift is isolated between the DC-DC converting means, and links to each other with solar energy conversion control main control MCU, can also detect the branch electric current of each phase of converting means.
Said heterogeneous phase shift is isolated the DC-DC converting means and is made up of 1～8 tunnel isolation DC-DC basic transformation device parallel connection; Every road isolates DC-DC basic transformation device by the control of solar energy conversion control main control MCU, directly parallel connection of its output.It is at most 8 the tunnel to be come by the resource limit of MCU that heterogeneous phase shift is isolated the DC-DC converting means, and reality can arrive unlimited multichannel in theory, and way does not have the use value of reality too much yet.
Said isolation DC-DC basic transformation device detects Alarm Unit by PWM driver element, flyback isolation boosting converter unit and overcurrent protection and is linked in sequence and forms, and the input of PWM driver element is controlled main control MCU with the solar energy conversion respectively with the output of overcurrent protection detection Alarm Unit and is connected.Isolate the PWM signal controlling that DC-DC basic transformation device is produced by solar energy conversion control main control MCU.What flyback isolated variable unit used is known technology: the flyback switched mode power supply technology, utilize the elementary of a switch controlled switch transformer, and primary inductance is designated as Lc; When switching tube is opened, make that the power Vcc of elementary and primary side of switch transformer is parallelly connected, realize the short circuit charging; Charging interval is designated as Tc, and the Tc time is on-off switching tube later, and the electric current that at this moment flows through in the primary inductance is Ic; Then energy stored is in the transformer: Lc*Ic2/2; The primary switch pipe closes has no progeny transformer to secondary output energy, is guaranteeing that secondary in theory voltage almost can reach arbitrary value under the undersaturated prerequisite of magnetic core of transformer; Consider the maximum conditions of actual parasitic parameter, device, actual circuit environment that uses or the like; Output voltage is to be set to a scope than broad, and can adjust through adjustment charging interval Tc value and primary inductance L value, and secondary inductance is related with primary inductance and think that because of what the difference of the degree of coupling can be similar to its adjusting range is identical with L.
Said solar energy conversion control main control MCU comprises a communication unit, solar energy peak power output MPPT algorithm unit, peak point current algorithm unit, heterogeneous phase shift algorithm unit, timer multicircuit time unit, output voltage control module, soft start control module and abnormal protection control module; The boost communication interface unit of isolated variable device of communication unit and solar energy DC-DC is connected.
The output that said heterogeneous phase shift is isolated DC-DC converting means (hereinafter to be referred as converting means) includes the diode component of unilateal conduction, makes that the high pressure in the outgoing position parallel connection can not damage converting means when converting means is not worked; The diode component that also includes unilateal conduction in the outdoor DC high-voltage power supply makes the high-tension electricity that converting means produces when civil power cuts off the power supply can not damage outdoor DC high-voltage power supply and front stage circuits device thereof.
A kind of control method of control device of solar air conditioner is characterized in that receiving the order that needs the solar inverter power supply when carrying out information exchange through communication unit and air conditioner chamber's outer control device; Solar energy conversion control main control MCU is at first isolated sampling unit through high-voltage power voltage outdoor DC high-voltage power supply is carried out voltage sampling; Detect concrete magnitude of voltage, be designated as Vdc, if voltage Vdc is lower than below the 200V; Carry out soft start control; The concrete control method of soft start control is: with lower dutycycle output pwm signal, the output voltage that makes heterogeneous phase shift isolate the DC-DC converting means can match, and lowers the dash current when opening for the first time simultaneously; And then increase dutycycle one by one, up to the bid value of the voltage conforms air conditioner chamber outer control device of exporting;
If civil power has been connected and has not then been launched soft start function; The standard of judging is to detect the voltage Vdc of outdoor DC high-voltage power supply more than or equal to 200V; Controlled by output control unit this moment; Concrete grammar is: with Δ V is increment, and Vdc+ Δ V is that target is carried out output voltage control, and maximum is no more than control target limit value Vdcmax; The dutycycle of calculating by this control algolithm is designated as δ 1;
The magnitude of voltage of the solar cell of voltage detection unit input; Be designated as Vt, the primary electrical sensibility reciprocal of contained flyback isolating transformer is designated as L in the flyback isolation boosting converter unit, and the carrier wave of setting PWM pulsewidth adjustment waveform is Fc; Calculate ON time by δ 1 and be designated as T; The peak point current algorithm unit is obtained the maximum current that can reach according to formula: I=Vt*T/L, is designated as I1; Maximum ON time T is limited by following formula: T=L*I/Vt, the I in the formula be the maximum operating currenbt that allows of all flyback isolation boosting converter units and;
Solar energy peak power output MPPT algorithm unit, concrete control method is Vt1 for the voltage of setting detected solar cell last time, and detected this time voltage is Vt2, and both differences are designated as X, X=Vt1-Vt2; Last time, detected electric current was designated as It1, and detected this time electric current is designated as It2,, both are designated as Y at difference, Y=It1-It2, change in current recently realizes through the duty that changes pwm signal;
Make R=X/Y, R1=Vt2/It2, the preset worst error that allows is: Δ Rmax, Δ Rmax are positive number, Δ R=R+R1, if the absolute value of Δ R: | Δ R|≤Δ Rmax, the power that then is judged as solar cell output this moment is maximum; Further suppose two preset worst error values that allow: Δ Rmax1, Δ Rmax2, Δ Rmax1＞Δ Rmax2; Duty through regulating pwm signal is recently sought maximum power point (mpp), and the amplitude of at first regulating is big, judges, adjusts according to Δ Rmax1; When satisfying: | get into the fine tuning stage during Δ R|≤Δ Rmax1; Serve as to regulate target with Δ Rmax2 this moment, through the dutycycle of conversion pwm signal, makes and finally realize | Δ R|≤Δ Rmax2; Realize the maximum capacity output of solar cell, note current value I t2 at this moment is I2; According to the size of I1 and I2, if I1 more than or equal to I2, then controls according to the peak power output mode of I2 and works, if I1 less than I2, then controls according to the control mode of I1;
Timer multicircuit time unit is according to carrying out man-to-man PWM timing controlled with the quantity of isolating DC-DC basic transformation device; In order to regulate the PWM dutycycle of each converting means; The phase controlling that heterogeneous phase shift algorithm unit of while carries out conducting; The initial edge time that makes each isolation DC-DC basic transformation device under the identical situation of pwm signal carrier wave, open has nothing in common with each other and in the time interval in a PWM cycle, evenly distributes, and realizes heterogeneous phase shifting control.Phase shifting control has two kinds of control methods: after current opening turn-offed mutually, next was just open-minded mutually, and all are opened the back mutually and get into the next PWM cycle, and the dutycycle of this kind control method relatively can be smaller; Current next just begins mutually open-mindedly during opening mutually, and the starting point in PWM cycle is also asynchronous, and the dutycycle of this control method relatively can be bigger.
Also comprise an abnormal protection control module in the said solar energy conversion control main control MCU; When the voltage that detects solar cell is lower than a certain predetermined value V01; Solar energy conversion control main control MCU is turn-offed all outputs of isolating DC-DC basic transformation devices, recovers output when being higher than V01 and adding a return difference surplus; When the overcurrent alarm appearred in wherein some isolation DC-DC basic transformation devices, solar energy conversion control main control MCU was just turn-offed this and is exported mutually, only used remainingly to work on mutually; Automatically recover after surpassing the designated time, this is exported mutually with regard to permanent shut-down if alarm the times N time back that reaches reservation continuously; When detecting that output voltage V dc reaches or turn-offing the output of all phases when being higher than alarm threshold value, alarm simultaneously.When mains failure or when artificially breaking off; Under user's operating command, sunshine enough makes when the DC-DC converter can be worked, and is can independent startup solar powered; The high direct voltage of output is predetermined value Vdc0; If load is when too heavy, voltage follow descends, and simultaneously outdoor control device 2 reduces running loads until outdoor indoor control and fan operation stop solar energy DC-DC converter when the voltage of the high direct voltage of exporting is lower than 200V the work that only keeps out of service.
The demand of judging electric weight when solar energy conversion control main control MCU hour is turn-offed a certain phase or the heterogeneous isolation DC-DC basic transformation device of wherein working, and raises the efficiency to reduce the wastage.
The present invention utilizes inexhaustible green energy resource solar energy to drive the operation of air-conditioner, and solar energy is directly parallelly connected through the direct current of over commutation with civil power after the DC-DC conversion, for air-conditioner provides power supply.The Indoor Control Device of air-conditioner adopts dc source; In the middle of do not have rectification circuit, its dc source is directly taken from outdoor public storage capacitor C1, has avoided the secondary inversion of solar energy; Can be implemented in civil power in the controller simultaneously changes behind the direct current and solar-electricity parallelly connected behind isolation boosting; And can realize the maximum using of controlled solar energy, and when solar energy is not enough, utilize civil power to replenish simultaneously, do not reduce the air conditioning effect of air-conditioner.The control device of solar air conditioner; Air conditioner chamber's inner controller and outdoor control device by known technology are formed, and on this basis, Indoor Control Device is from outdoor power taking; The power taking power supply is a DC high-voltage power supply, and Indoor Control Device does not have the rectification circuit of electric main; Outdoor control device also comprises a solar energy DC-DC parallelly connected with outdoor DC high-voltage power supply boost isolated variable device and a solar battery group, gives outdoor DC high-voltage power supply power supply in order to utilize solar energy.In addition; Between outdoor control device and outdoor DC high-voltage power supply, added a switch; In order to the power supply of control room outer control device, outdoor control device and solar energy DC-DC boost and also have a communication branch road between the isolated variable device, in order to carry out information exchange.This device can realize that solar energy DC-DC boosts behind isolated variable device and the commercial power rectification or rectification and safe and reliable parallelly connected through between the outdoor DC high-voltage power supply after the PFC, and the height of voltage is in the nominal range of use of air-conditioner and unrestricted.The control method of this control device has realized the follow-up algorithm controls of the best fan-out capability of solar cell and kinds of protect function, output voltage following function, the power control function of outdoor control device.
Description of drawings
Fig. 1 is one embodiment of the invention theory diagram.
Fig. 2 is the solar energy DC-DC isolated variable device catenation principle block diagram that boosts.
Fig. 3 is solar energy conversion control main control MCU theory diagram.
Fig. 4 is the phase shift sequential chart of a phase-shifting control method.
Fig. 5 is the phase shift sequential chart of another phase-shifting control method.
Fig. 6 is a kind of flyback boost conversion circuit figure.
Fig. 7 is another kind of flyback boost conversion circuit figure.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Referring to Fig. 1-Fig. 3; The control device of this solar air conditioner; Comprise by air conditioner chamber's inner controller 1, air conditioner chamber's outer control device 2, outdoor power circuit and indoor and outdoor order circuit and forming; Air conditioner chamber's inner controller and outdoor control device comprise air-conditioning control functional unit, and air conditioner controlling device also comprises public storage capacitor C1 and solar energy DC-DC boost isolated variable device 4, solar cell 7; Outdoor power circuit comprises power switch, EMC circuit, the outdoor DC high-voltage power supply 3 that is connected with city's point electrical network successively; The boost high-voltage DC power supply input of high-voltage DC power supply input and outdoor control device of output, Indoor Control Device of isolated variable device of the output of outdoor DC high-voltage power supply, solar energy DC-DC is all directly parallelly connected with storage capacitor C1; Outdoor solar cell and the solar energy DC-DC isolated variable device sequence that boosts is connected, and solar energy DC-DC boosts and is connected by order circuit between isolated variable device and the air conditioner chamber outer control device.
The a complete set of controller of air-conditioner has been used the principle of common full DC variable frequency air conditioner controller; Shown in accompanying drawing 1; Air conditioner chamber's inner controller 1 has comprised indoor main control MCU, has given low voltage control part powered switch power supply, the EMC circuit unit on the high-voltage DC power supply, display unit, dc fan, the communication unit with outdoor, temperature sensor, other functional unit or the like; But the rectification circuit that does not have commercial power interface and mains ac power supply, dc source are directly taken from outdoor public storage capacitor C1.Air conditioner chamber's outer control device 2 comprise outdoor main control MCU, outdoor switch power supply, with indoor communication and with compositions such as the communication unit of solar energy DC-DC isolated variable device 4 communications, outdoor dc fan, display unit, outdoor temperature sensor, VFC and driver element, frequency-changeable compressor, other functional units; Its power supply is a dc source, directly takes from public storage capacitor C1; At outdoor outdoor power unit in addition, specifically comprise: the power switch that is electrically connected with the city, EMC circuit, outdoor DC high-voltage power supply 3; Outdoor DC high-voltage power supply 3 comprises known rectification circuit, PFC PFC control and drive circuit; Its output meets public storage capacitor C1.
Solar energy DC-DC boost isolated variable device 4 by communication interface unit 41, high voltage source high pressure isolate sampling unit 42, heterogeneous phase shift is isolated DC-DC converting means 43, current detecting unit 44, voltage detection unit 45 and solar energy conversion control main control MCU 46 and is formed; The output that high-voltage power voltage is isolated sampling unit links to each other with solar energy conversion control main control MCU; Communication interface unit links to each other with the order circuit of outdoor control device 2, and is connected with solar energy conversion control main control MCU; Heterogeneous phase shift is isolated the DC-DC converting means and is linked to each other with solar energy conversion control main control MCU.
Heterogeneous phase shift is isolated DC-DC converting means 43 and is made up of 1～8 tunnel isolation DC-DC basic transformation device parallel connection; Every road isolates DC-DC basic transformation device by 46 controls of solar energy conversion control main control MCU, directly parallel connection of its output.Isolation DC-DC basic transformation device is linked in sequence by PWM driver element 71, flyback isolation boosting converter unit 72 and overcurrent protection detection Alarm Unit 73 and forms; The input of PWM driver element is connected with solar energy conversion control main control MCU 46 respectively with the output that overcurrent protection detects Alarm Unit, sees Fig. 3.
The output that above-mentioned heterogeneous phase shift is isolated DC-DC converting means 43 includes the diode component of unilateal conduction; The diode component that also includes unilateal conduction in the outdoor DC high-voltage power supply 3.Specifically see accompanying drawing 7, accompanying drawing 6 shows another kind of circuit structure; Implement the actual circuit that also comprises the PFC part in the circuit.
Timer multicircuit time unit is according to carrying out man-to-man PWM timing controlled with the quantity of isolating DC-DC basic transformation device; In order to regulate the PWM dutycycle of each converting means; The phase controlling that heterogeneous phase shift algorithm unit of while carries out conducting; The initial edge time that makes each isolation DC-DC basic transformation device under the identical situation of pwm signal carrier wave, open has nothing in common with each other and in the time interval in a PWM cycle, evenly distributes, and realizes heterogeneous phase shifting control.Phase shifting control has two kinds of control methods: method shown in Figure 4 is that next was just open-minded mutually after current opening turn-offed mutually, and all are opened the back mutually and get into the next PWM cycle, and the dutycycle of this kind control method relatively can be smaller; Method shown in Figure 5 is that next just begins mutually open-mindedly during opening mutually current, and the starting point in PWM cycle is also asynchronous, and the dutycycle of this control method relatively can be bigger.
All these professional persons through circuit structure conversion or pro forma conversion, do not have the present invention substantial innovation to belong to protection scope of the present invention.
Claims (10)
1. the control device of a solar air conditioner; Comprise air conditioner chamber's inner controller (1), air conditioner chamber's outer control device (2), outdoor power circuit and indoor and outdoor order circuit; Air conditioner chamber's inner controller and outdoor control device comprise air-conditioning control functional unit, it is characterized in that air conditioner controlling device also comprises public storage capacitor C1 and solar energy DC-DC boost isolated variable device (4), solar cell (7); Outdoor power circuit comprises power switch, EMC circuit, the outdoor DC high-voltage power supply (3) that is connected with city's point electrical network successively; The boost high-voltage DC power supply input of high-voltage DC power supply input and outdoor control device of output, Indoor Control Device of isolated variable device of the output of outdoor DC high-voltage power supply, solar energy DC-DC is all directly parallelly connected with storage capacitor C1; Outdoor solar cell and the solar energy DC-DC isolated variable device sequence that boosts is connected, and solar energy DC-DC boosts and is connected by order circuit between isolated variable device and the air conditioner chamber outer control device.
2. according to the control device of the said solar air conditioner of claim 1, it is characterized in that said solar cell (7) and solar energy DC-DC boost also to be connected with line switching (8) between the isolated variable device (4).
3. according to the control device of the said solar air conditioner of claim 2, it is characterized in that the said solar energy DC-DC isolated variable device (4) that boosts isolates sampling unit (42), heterogeneous phase shift by communication interface unit (41), high voltage source high pressure and isolate DC-DC converting means (43), current detecting unit (44), voltage detection unit (45) and solar energy conversion and control main control MCU (46) and form; The output that high-voltage power voltage is isolated sampling unit links to each other with solar energy conversion control main control MCU; Communication interface unit links to each other with the order circuit of outdoor control device (2), and is connected with solar energy conversion control main control MCU; Heterogeneous phase shift is isolated the DC-DC converting means and is linked to each other with solar energy conversion control main control MCU.
4. according to the control device of the said solar air conditioner of claim 3; It is characterized in that said current detecting unit (44) is series at solar cell (7) and heterogeneous phase shift is isolated between the DC-DC converting means (43), and link to each other with solar energy conversion control main control MCU (46).
5. according to the control device of the said solar air conditioner of claim 4, it is characterized in that said heterogeneous phase shift isolation DC-DC converting means (43) is made up of 1～8 tunnel isolation DC-DC basic transformation device parallel connection; Every road isolates DC-DC basic transformation device by solar energy conversion control main control MCU (46) control, directly parallel connection of its output.
6. according to the control device of the said solar air conditioner of claim 5; It is characterized in that said isolation DC-DC basic transformation device detects Alarm Unit (73) by PWM driver element (71), flyback isolation boosting converter unit (72) and overcurrent protection and is linked in sequence and forms, the input of PWM driver element is controlled main control MCU (46) with the solar energy conversion respectively with the output of overcurrent protection detection Alarm Unit and is connected.
7. according to the control device of the said solar air conditioner of claim 6, it is characterized in that said solar energy conversion control main control MCU (46) comprises communication unit (51), solar energy peak power output MPPT algorithm unit (52), peak point current algorithm unit (53), heterogeneous phase shift algorithm unit (54), timer multicircuit time unit (55), output voltage control module (56), soft start control module (57) and abnormal protection control module (58); The boost communication interface unit (41) of isolated variable device (4) of communication unit and solar energy DC-DC is connected; The output that said heterogeneous phase shift is isolated DC-DC converting means (43) includes the diode component of unilateal conduction; The diode component that also includes unilateal conduction in the outdoor DC high-voltage power supply (3).
8. according to the control method of the said solar air conditioner control device of claim 7; It is characterized in that when carrying out information exchange through communication unit (51) and air conditioner chamber's outer control device (2); Receive the order that needs the solar inverter power supply, solar energy conversion control main control MCU (46) is at first isolated sampling unit (42) through high-voltage power voltage outdoor DC high-voltage power supply (3) is carried out voltage sampling, detects concrete magnitude of voltage; Be designated as Vdc; If voltage Vdc is lower than below the 200V, carry out soft start control, the concrete control method of soft start control is: with lower dutycycle output pwm signal; The output voltage that makes heterogeneous phase shift isolate DC-DC converting means (43) can match; Lower the dash current when opening for the first time simultaneously, and then increase dutycycle one by one, up to the bid value of the voltage conforms air conditioner chamber outer control device of exporting (2);
If civil power has been connected and has not then been launched soft start function; The standard of judging is to detect the voltage Vdc of outdoor DC high-voltage power supply (3) more than or equal to 200V; Controlled by output control unit (56) this moment; Concrete grammar is: with Δ V is increment, and Vdc+ Δ V is that target is carried out output voltage control, and maximum is no more than control target limit value Vdcmax; The dutycycle of calculating by this control algolithm is designated as δ 1;
The magnitude of voltage of the solar cell (7) of voltage detection unit (45) input; Be designated as Vt, the primary electrical sensibility reciprocal of contained flyback isolating transformer is designated as L in the flyback isolation boosting converter unit (72), and the carrier wave of setting PWM pulsewidth adjustment waveform is Fc; Calculate ON time by δ 1 and be designated as T; Peak point current algorithm unit (53) is obtained the maximum current that can reach according to formula: I=Vt*T/L, is designated as I1; Maximum ON time T is limited by following formula: T=L*I/Vt, the I in the formula be the maximum operating currenbt that allows of all flyback isolation boosting converter units and;
Solar energy peak power output MPPT algorithm unit (52), concrete control method is Vt1 for the voltage of setting detected solar cell last time (7), and detected this time voltage is Vt2, and both differences are designated as X, X=Vt1-Vt2; Last time, detected electric current was designated as It1, and detected this time electric current is designated as It2,, both are designated as Y at difference, Y=It1-It2, change in current recently realizes through the duty that changes pwm signal;
Make R=X/Y, R1=Vt2/It2, the preset worst error that allows is: Δ Rmax, Δ Rmax are positive number, Δ R=R+R1, if the absolute value of Δ R: | Δ R|≤Δ Rmax, the power that then is judged as solar cell output this moment is maximum; Further suppose two preset worst error values that allow: Δ Rmax1, Δ Rmax2, Δ Rmax1＞Δ Rmax2; Duty through regulating pwm signal is recently sought maximum power point (mpp), and the amplitude of at first regulating is big, judges, adjusts according to Δ Rmax1; When satisfying: | get into the fine tuning stage during Δ R|≤Δ Rmax1; Serve as to regulate target with Δ Rmax2 this moment, through the dutycycle of conversion pwm signal, makes and finally realize: | Δ R|≤Δ Rmax2; Realize the maximum capacity output of solar cell, note current value I t2 at this moment is I2; According to the size of I1 and I2, if I1 more than or equal to I2, then controls according to the peak power output mode of I2 and works, if I1 less than I2, then controls according to the control mode of I1;
Timer multicircuit time unit (55) is according to carrying out man-to-man PWM timing controlled with the quantity of isolating DC-DC basic transformation device; In order to regulate the PWM dutycycle of each converting means; The phase controlling that heterogeneous phase shift algorithm unit of while (54) carries out conducting; The initial edge time that makes each isolation DC-DC basic transformation device under the identical situation of pwm signal carrier wave, open has nothing in common with each other and in the time interval in a PWM cycle, evenly distributes, and realizes heterogeneous phase shifting control.
9. the control method of said according to Claim 8 solar air conditioner control device; It is characterized in that also comprising an abnormal protection control module (58) in the said solar energy conversion control main control MCU (46); When the voltage that detects solar cell (7) is lower than a certain predetermined value V01; Solar energy conversion control main control MCU is turn-offed all outputs of isolating DC-DC basic transformation devices, recovers output when being higher than V01 and adding a return difference surplus; When the overcurrent alarm appearred in wherein some isolation DC-DC basic transformation devices, solar energy conversion control main control MCU was just turn-offed this and is exported mutually, only used remainingly to work on mutually; Automatically recover after surpassing the designated time, this is exported mutually with regard to permanent shut-down if alarm the times N time back that reaches reservation continuously; When detecting that output voltage V dc reaches or turn-offing the output of all phases when being higher than alarm threshold value, alarm simultaneously.
10. according to the control method of the said solar air conditioner control device of claim 9; It is characterized in that the said demand of judging electric weight when solar energy conversion control main control MCU (46) hour; Turn-off a certain phase or the heterogeneous isolation DC-DC basic transformation device of wherein working, raise the efficiency to reduce the wastage.
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| CN102003769B (en) * | 2010-11-05 | 2012-11-07 | 广东美的电器股份有限公司 | Method for controlling solar air-conditioning system |
| CN102798176B (en) * | 2012-08-09 | 2015-09-09 | 深圳市索阳新能源科技有限公司 | Solar environment friendly intelligent air condition |
| CN104135027B (en) * | 2014-07-11 | 2016-09-14 | 珠海格力电器股份有限公司 | Photovoltaic transducer air conditioning and method for controlling power supply thereof |
| CN105202666A (en) * | 2015-10-22 | 2015-12-30 | 广东美的制冷设备有限公司 | Solar air conditioning system and control method thereof |
| CN107659146B (en) * | 2017-04-26 | 2021-04-13 | 珠海天兆新能源技术有限公司 | Method and circuit for improving MPPT current sampling precision of photovoltaic water pump system |
| CN110460105B (en) * | 2019-09-26 | 2021-02-23 | 珠海格力电器股份有限公司 | Starting method and controller of photovoltaic air conditioning system and photovoltaic air conditioning system |
| CN111219820A (en) * | 2020-01-19 | 2020-06-02 | 山东华宇工学院 | Household air conditioner hybrid energy control device and air conditioner |
| CN114234307A (en) * | 2021-11-17 | 2022-03-25 | 青岛海尔空调器有限总公司 | Solar air conditioner, control method thereof, electronic device and storage medium |
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| CN2665593Y (en) * | 2003-11-05 | 2004-12-22 | 海尔集团公司 | Air-conditioning system powered by solar energy and alternating current |
| US20060149422A1 (en) * | 2004-12-30 | 2006-07-06 | James Edward Dunstan | Air circulation control device |
| CN201715661U (en) * | 2010-03-04 | 2011-01-19 | 广东美的电器股份有限公司 | Control device of solar air conditioner |
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