CN204141794U - Photovoltaic air conditioner and photovoltaic air conditioning system - Google Patents
Photovoltaic air conditioner and photovoltaic air conditioning system Download PDFInfo
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- CN204141794U CN204141794U CN201420467588.7U CN201420467588U CN204141794U CN 204141794 U CN204141794 U CN 204141794U CN 201420467588 U CN201420467588 U CN 201420467588U CN 204141794 U CN204141794 U CN 204141794U
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- 238000004378 air conditioning Methods 0.000 title abstract description 33
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- 230000003993 interaction Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 230000010349 pulsation Effects 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 4
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Abstract
The utility model discloses a photovoltaic air conditioner and photovoltaic air conditioning system. Wherein, photovoltaic air conditioner includes: an air conditioning load; the alternating current side of the inverter circuit is connected with the air conditioner load and the commercial power grid respectively, and the direct current side of the inverter circuit is connected with the photovoltaic cell panel and used for converting direct current output by the photovoltaic cell panel into alternating current required by the work of the air conditioner load; the rectification circuit is connected between the inverter circuit and the commercial power grid and is used for converting alternating current output by the commercial power grid into direct current; and the movable positions of the movable contact of the relay comprise a first position and a second position, the alternating current side of the inverter circuit is communicated with the air conditioner load under the condition that the movable contact is positioned at the first position, and the alternating current side of the inverter circuit is communicated with the commercial power grid under the condition that the movable contact is positioned at the second position. Through the utility model discloses, the effect of the cost that reduces photovoltaic air conditioning system has been reached.
Description
Technical field
The utility model relates to air-conditioner field, in particular to a kind of PV air-conditioner device and PV air-conditioner system.
Background technology
Existing PV air-conditioner device, can realize grid-connected function, photovoltaic is air-conditioning function of supplying power and simultaneously grid-connectedly power with for air-conditioning.But existing PV air-conditioner device all has two cover inversion systems usually, a set of for generating electricity by way of merging two or more grid systems, a set of for driving air conditioner load, such as compressor.
Due in PV air-conditioner device, the cost of inverter circuit power conversion device occupies the larger part of whole PV air-conditioner device, therefore, adopt two cover inversion systems that the cost of PV air-conditioner device certainly will be caused to raise, this brings huge obstacle to promoting the use of of PV air-conditioner device.
For in prior art owing to adopting two cover inversion systems to cause the problem that the cost of PV air-conditioner device is high, at present effective solution is not yet proposed.
Utility model content
Main purpose of the present utility model is to provide a kind of PV air-conditioner device and PV air-conditioner system, to solve in prior art owing to adopting two cover inversion systems to cause the problem that the cost of PV air-conditioner system is high.
To achieve these goals, according to an aspect of the present utility model, a kind of PV air-conditioner device is provided.Comprise according to PV air-conditioner device of the present utility model: air conditioner load; Inverter circuit, the AC of inverter circuit is connected with utility grid respectively with air conditioner load, and the DC side of inverter circuit is connected with photovoltaic battery panel, for the alternating current of DC conversion needed for air conditioner load work exported by photovoltaic battery panel; Rectification circuit, is connected between inverter circuit and utility grid, and the AC conversion for utility grid being exported is direct current; And relay, be connected between the AC of inverter circuit and air conditioner load, and be connected between the AC of inverter circuit and utility grid, the moving position of the movable contact of relay comprises primary importance and the second place, when movable contact is in primary importance, the AC of inverter circuit and air conditioner load are connected, and when movable contact is in the second place, the AC of inverter circuit and utility grid are connected.
Further, PV air-conditioner device also comprises: control circuit, is connected with relay, and when movable contact is in the second place, control circuit is used for controlling movable contact when producing island effect and is switched to primary importance.
Further, control circuit comprises: sampling and modulate circuit, for the electric network information of utility grid of sampling; Master controller, is connected with sampling and modulate circuit, for carrying out logical operation according to the employing signal received, controls the connection status of relay.
Further, the DC potential that rectification circuit exports has the direct current of the voltage of pulsation, and PV air-conditioner device also comprises: booster circuit, is connected between photovoltaic battery panel and the DC side of inverter circuit, direct current for exporting photovoltaic battery panel boosts, and obtains the first direct current; Pfc circuit, be connected between rectification circuit and the DC side of inverter circuit, the voltage for the pulsation exported rectification circuit boosts, and obtains the second direct current, wherein, booster circuit and pfc circuit are all connected with the DC side of inverter circuit by dc bus.
Further, control circuit is connected with pfc circuit respectively with booster circuit, wherein, when movable contact is in primary importance, control circuit exports the second direct current to dc bus for controlling pfc circuit, and the first galvanic voltage controlling booster circuit output is less than the second galvanic voltage; When movable contact is in primary importance, control circuit is used for exporting the first direct current to dc bus by booster circuit, and the second galvanic voltage controlling pfc circuit output is less than the first galvanic voltage; When movable contact is in primary importance, control circuit controls booster circuit and pfc circuit respectively, makes the first direct current identical with the second galvanic voltage; When movable contact is in the second place, control circuit is for the electric network information of utility grid of sampling, and controlling the second direct current that the first galvanic voltage that booster circuit exports exports higher than pfc circuit or the connection controlling cut-out pfc circuit, control circuit is also that alternating current is incorporated in utility grid for controlling inverter circuit by the voltage inversion of dc bus.
Further, PV air-conditioner device also comprises: power supply circuits, is connected respectively with control circuit with dc bus, for providing direct current energy to control circuit; Man-machine interaction circuit, is connected with control circuit, for realizing man-machine data interaction.
Further, man-machine interaction circuit comprises: display circuit, is connected with control circuit, for showing duty and the parameter information of photovoltaic air-conditioner; And key circuit, be connected with control circuit, for realizing the Non-follow control to PV air-conditioner device.
Further, PV air-conditioner device also comprises: the first filter circuit, is connected between photovoltaic battery panel and booster circuit, filters for the common and different mode interference inputted photovoltaic battery panel.
Further, PV air-conditioner device also comprises: the second filter circuit, is connected between utility grid and rectification circuit, filters for the high-frequency conduction that produces PV air-conditioner device and radiation.
Further, PV air-conditioner device also comprises filter inductance, and the first end of filter inductance is connected with utility grid, and the second end of filter inductance is connected with relay, for carrying out shaping to the alternating current being incorporated into utility grid.
To achieve these goals, according to another aspect of the present utility model, provide a kind of PV air-conditioner system.Comprise according to PV air-conditioner system of the present utility model: above-mentioned PV air-conditioner device, PV air-conditioner device is connected with utility grid; Photovoltaic battery panel, is connected with PV air-conditioner device, for providing electric energy to PV air-conditioner device.
According to the utility model embodiment, PV air-conditioner device is adopted to comprise: air conditioner load, inverter circuit, the AC of described inverter circuit is connected with described air conditioner load, and the DC side of described inverter circuit is connected with photovoltaic battery panel, for the alternating current of DC conversion needed for described air conditioner load work exported by described photovoltaic battery panel, rectification circuit, is connected between described inverter circuit and utility grid, and the AC conversion for described utility grid being exported is direct current, and relay, be connected between the AC of described inverter circuit and described air conditioner load, and be connected between the AC of described inverter circuit and described utility grid, the moving position of the movable contact of described relay comprises primary importance and the second place, when described movable contact is in primary importance, the AC of described inverter circuit and described air conditioner load are connected, when described movable contact is in the second place, AC and the described utility grid of described inverter circuit are connected, solve owing to adopting two cover inversion systems to cause the problem that the cost of PV air-conditioner device is high, reach the effect of the cost reducing PV air-conditioner device.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the PV air-conditioner device according to the utility model embodiment; And
Fig. 2 is the structural representation according to the preferred PV air-conditioner device of the utility model embodiment.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
The utility model scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the embodiment of the utility model part, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the utility model protection.
It should be noted that, term " first ", " second " etc. in description of the present utility model and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that embodiment of the present utility model described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those components and parts that the system of a series of components and parts, product or equipment are not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other components and parts of these systems, product or equipment.
The utility model embodiment provides a kind of PV air-conditioner device.
Fig. 1 is the structural representation of the PV air-conditioner device according to the utility model embodiment.As shown in Figure 1, this PV air-conditioner device comprises: air conditioner load 11, inverter circuit 12, rectification circuit 13 and relay 14.
Air conditioner load can be such as compressor, DC fan etc.
The AC of inverter circuit 12 is connected with utility grid 16 respectively with air conditioner load 11, the DC side of inverter circuit 12 is connected with photovoltaic battery panel 15, is converted into alternating current (AC) for the direct current (DC) exported by photovoltaic battery panel 15.This alternating current can be that air conditioner load 11 works required alternating current or grid-connected alternating current.Rectification circuit 13 is connected between inverter circuit 12 and utility grid 16, AC conversion for utility grid 16 being exported is direct current, rectification circuit 13 can be full bridge rectifier, and the AC conversion for utility grid being exported is the forward voltage of pulsation.
Relay 14 is connected between the AC of inverter circuit 12 and air conditioner load 11, and is connected between the AC of inverter circuit 12 and utility grid 16, and relay is for switching the load object (air conditioner load or utility grid) of inverter circuit 12.
Particularly, the moving position of the movable contact of relay 14 comprises primary importance and the second place, when movable contact is in primary importance, AC and the air conditioner load 11 of inverter circuit 12 are connected, when movable contact is in the second place, AC and the utility grid 16 of inverter circuit 12 are connected.The load object (air conditioner load or utility grid) that inverter circuit connects is switched by controlling the position of movable contact.When movable contact is in primary importance, PV air-conditioner device is in air conditioning mode, air conditioner load work, and electric energy needed for its work can be the electric energy that photovoltaic battery panel provides, and can be also the electric energy that utility grid provides, or the two provides electric energy jointly; When movable contact is in the second place, PV air-conditioner device is in the pattern of generating electricity by way of merging two or more grid systems, and air conditioner load does not work, and the electric energy that photovoltaic battery panel exports is incorporated in utility grid.
Particularly, above-mentioned air conditioner load can be the compressor of air-conditioner, in the utility model embodiment, photovoltaic grid-connected inversion module and DRIVEN BY AIR CONDITIONING COMPRESSOR module is united two into one, can realize grid-connected work or compressor operating by relay switch load.
The PV air-conditioner device of the utility model embodiment saves an inversion module and radiator thereof and corresponding drive circuit relative to existing photovoltaic controller, save the grid-connected control relay of inverters simultaneously, significantly reduce PV air-conditioner device cost, be conducive to the penetration and promotion of PV air-conditioner device, more practical.
According to the utility model embodiment, PV air-conditioner device comprises: air conditioner load, inverter circuit, the AC of inverter circuit is connected with air conditioner load, and the DC side of inverter circuit is connected with photovoltaic battery panel, for the alternating current of DC conversion needed for air conditioner load work exported by photovoltaic battery panel, rectification circuit, is connected between inverter circuit and utility grid, and the AC conversion for utility grid being exported is direct current, and relay, be connected between the AC of inverter circuit and air conditioner load, and be connected between the AC of inverter circuit and utility grid, the moving position of the movable contact of relay comprises primary importance and the second place, when movable contact is in primary importance, the AC of inverter circuit and air conditioner load are connected, when movable contact is in the second place, the AC of inverter circuit and utility grid are connected, solve owing to adopting two cover inversion systems to cause the problem that the cost of PV air-conditioner device is high, reach the effect of the cost reducing PV air-conditioner device.
Fig. 2 is the structural representation according to the preferred PV air-conditioner device of the utility model embodiment.As shown in Figure 2, PV air-conditioner device also comprises control circuit 17, and this control circuit 17 is connected with relay 14 (not shown).Wherein, the movable contact of relay 14 comprises K1, K2 and K3, and above-mentioned primary importance is the A of position shown in figure, and the second place is the B of position shown in figure.When movable contact K1 ~ K3 is in second place B, control circuit 17 is switched to primary importance for controlling movable contact K1 ~ K3 when producing island effect, wherein, when movable contact K1 ~ K3 is in primary importance, AC and the utility grid 16 of inverter circuit 12 disconnect.
When movable contact K1 ~ K3 is in second place B, PV air-conditioner device is in the pattern of generating electricity by way of merging two or more grid systems.Wherein, when producing island effect, cut off the connection of inverter circuit and utility grid by control circuit control relay, thus without the need to increasing grid-connected control relay again, reduce the cost of PV air-conditioner device further.
Preferably, control circuit 17 comprises: sampling and modulate circuit, for the electric network information of utility grid 16 of sampling; Master controller, is connected with sampling and modulate circuit, for carrying out logical operation according to the sampled signal received and above-mentioned electric network information, controls the connection status of relay.Wherein, when monitoring utility grid power down, the AC and the utility grid 16 that control inverter circuit 12 disconnect.
Particularly, control circuit 17 comprises master controller, sampling and modulate circuit, protection circuit, drive circuit etc.The different analog signals such as sampling and the main sampled voltage of modulate circuit, electric current, frequency, phase place, temperature, line level of going forward side by side is changed, and is entered into master controller; Protection circuit, mainly for overvoltage, overcurrent, the abnormal conditions such as overheated, controls the protection of power device emergency shutdown, to ensure element, equipment and personal safety; Drive circuit provides enough drive currents, to control the timely conducting of power device and shutoff.
The PV air-conditioner utensil of the utility model embodiment has islanding detect function, by the electric network information of utility grid of sampling, when utility grid power down being detected, disconnecting the electrical connection of inverter circuit and utility grid in time, load is switched to compressor.
Preferably, the direct current that rectification circuit exports is the direct current of the voltage with pulsation, and PV air-conditioner device also comprises booster circuit 18 and pfc circuit 19.Booster circuit 18 is connected between the DC side of photovoltaic battery panel 15 and inverter circuit 12, boosts, obtain the first direct current for the direct current exported photovoltaic battery panel 15.Booster circuit 18 is for being upgraded to high voltage direct current i.e. the first direct current by the low-voltage DC of photovoltaic battery panel, carry out photovoltaic Maximum Power Output point simultaneously and follow the tracks of (MPPT), namely booster circuit 18 can comprise MPPT module, booster circuit 18 is made to have MPPT maximum power point tracking function, by MPPT module acquires photovoltaic current output voltage and electric current, and rated output, and control the maximum power point following the trail of photovoltaic battery panel 15 output.Booster circuit 18 can be boost circuit or DC/DC circuit or the combination of the two.
Pfc circuit 19 is connected between the DC side of rectification circuit 13 and inverter circuit 12, voltage for the pulsation exported rectification circuit 13 boosts, obtain the second direct current, wherein, booster circuit 18 and pfc circuit 19 are all connected by the DC side of dc bus 20 with inverter circuit 12.
Pfc circuit is used for carrying out boosting to the voltage of the pulsation that rectification circuit 13 exports and obtains the second direct current, and accesses dc bus 20, and pfc circuit also has power factor emendation function simultaneously, makes input voltage and input current homophase.
Preferably, control circuit 17 is connected with pfc circuit 19 respectively with booster circuit 18, wherein, when movable contact K1 ~ K3 is in primary importance A, control circuit 17 exports the second direct current to dc bus 20 for controlling pfc circuit 19, and the first galvanic voltage controlling booster circuit 18 output is less than the second galvanic voltage, then booster circuit 18 exports by dc bus 20 voltage clamp, PV air-conditioner device consumes the energy of utility grid, and this pattern is identical with common air-conditioning mode of operation.
When movable contact K1 ~ K3 is in primary importance A, control circuit 17 is for exporting the first direct current to dc bus 20 by booster circuit 18, and the second galvanic voltage controlling pfc circuit 19 output is less than the first galvanic voltage, then PFC exports by dc bus 20 voltage clamp, and PV air-conditioner device consumes the energy of photovoltaic battery panel input.
When movable contact PV air-conditioner device is in primary importance A, control circuit 17 controls booster circuit 18 and pfc circuit 19 respectively, make the first direct current identical with the second galvanic voltage, jointly for dc bus 20 provides energy, air conditioner load 11 obtains work institute energy requirement from dc bus 20.
When movable contact is in second place B, control circuit 17 is for the electric network information of utility grid 16 of sampling, and controlling the second direct current that the first galvanic voltage that booster circuit 18 exports exports higher than pfc circuit 19 or the connection controlling cut-out pfc circuit 19, control circuit 17 is also that alternating current is incorporated in utility grid 16 for controlling inverter circuit 12 by the voltage inversion of dc bus 20.
Particularly, the PV air-conditioner utensil of the utility model embodiment has 4 kinds of mode of operations:
1. common air-conditioning pattern: identical with common air-conditioning mode of operation, PV air-conditioner device obtains institute's energy requirement from utility grid 16.
2. photovoltaic power supply pattern: PV air-conditioner device consumes the energy of photovoltaic battery panel 15.
3. mixed powering mode: utility grid 16 and photovoltaic battery panel 15 are jointly for PV air-conditioner device provides institute's energy requirement.
4. to generate electricity by way of merging two or more grid systems pattern: the electric energy that photovoltaic battery panel 15 produces is incorporated to utility grid 16.
Wherein, 1. common air-conditioning pattern: relay K 1 ~ K3 is closed to A point, PV air-conditioner device switches to air conditioning mode, the AC conversion of utility grid 16 is be sent to dc bus 20 after high voltage direct current by rectification circuit 13 and pfc circuit 19 by control circuit 17, controlling booster circuit 18 makes its output voltage (i.e. the first galvanic voltage) be less than the output voltage (i.e. the second galvanic voltage) of pfc circuit 19, then the output of booster circuit 18 is by dc bus 20 voltage clamp, PV air-conditioner device consumes the energy of utility grid 16, this pattern is identical with common air-conditioning mode of operation.
2. photovoltaic power supply pattern: relay K 1 ~ K3 is closed to A point, PV air-conditioner device switches to air conditioning mode, control circuit 17 controls to be sent to dc bus 20 after the output voltage of photovoltaic battery panel 15 boosts by booster circuit 18, controlling pfc circuit 19 makes its output voltage (i.e. the second galvanic voltage) be less than the output voltage (i.e. the first galvanic voltage) of booster circuit 18, then the output of pfc circuit 19 is by dc bus 20 voltage clamp, and PV air-conditioner device consumes the energy that photovoltaic battery panel 15 inputs.
3. mixed powering mode: relay K 1 ~ K3 is closed to A point, PV air-conditioner device switches to air conditioning mode, control circuit 17 controls booster circuit 18 and pfc circuit 19 respectively, making the output voltage of the two identical is that the first direct current is identical with the second galvanic voltage, jointly for dc bus 20 provides energy, air conditioner load 11 obtains work institute energy requirement from dc bus 20.
4. to generate electricity by way of merging two or more grid systems pattern: relay K 1 ~ K3 is closed to B point, PV air-conditioner device switches to the pattern of generating electricity by way of merging two or more grid systems, the sample voltage of utility grid 16 of control circuit 17 obtains electric network information (voltage, amplitude, phase place etc.), control circuit 17 controls booster circuit 18 to be made its output voltage (i.e. the first galvanic voltage) higher than the output voltage (i.e. the second galvanic voltage) of pfc circuit 19 or cuts off pfc circuit 19, by photovoltaic battery panel 15 for dc bus 20 provides energy, controlling inverter circuit 12 is alternating current by the inversion of dc bus 20 voltage, be incorporated in utility grid 16.
Above-mentioned several mode of operation is not changeless, and the mode of operation of PV air-conditioner device changes with the power output of photovoltaic battery panel and the change of air conditioner load power demand.Such as, because the power output of photovoltaic battery panel 15 changes greatly by illumination, the impact of blocking, when working in air conditioning mode, priority task is in 2. photovoltaic power supply pattern, when the power output of photovoltaic battery panel 15 is less than air-conditioning power demand, PV air-conditioner device switches to 3. hybrid power supply pattern, and when photovoltaic input voltage is lower than the minimum input voltage (photograph as unglazed in night or low light situation) of booster circuit 18, PV air-conditioner device switches to 1. common air-conditioning pattern.
Wherein, when illumination is lower, the power output of solar photovoltaic cell panel is less, now photovoltaic power output is lower, during the work of PV air-conditioner device, relay K 1 ~ K3 adhesive is to A point, and PV air-conditioner device now is operationally still powered by utility grid, its working method and common air-conditioning working method completely the same.
When illumination is more sufficient, and when needing to open PV air-conditioner device, relay K 1 ~ K3 adhesive, to A point, provides PV air-conditioner device to run institute's energy requirement by photovoltaic DC-to-AC converter.
When PV air-conditioner device operate power is greater than the power that photovoltaic battery panel provides, PV air-conditioner device is jointly provided to run institute's energy requirement by photovoltaic battery panel and utility grid.
When illumination is more sufficient, and during without the need to opening PV air-conditioner device, relay K 1 ~ K3 adhesive is to B point, and photovoltaic DC-to-AC converter is started working, and the energy that photovoltaic battery panel exports is fed to utility grid.
Preferably, PV air-conditioner device also comprises: power supply circuits 21 and man-machine interaction circuit 22.Power supply circuits 21 are connected with control circuit 17 respectively with dc bus 20, for providing direct current energy to control circuit 17; Man-machine interaction circuit 22 is connected with control circuit 17, for realizing man-machine data interaction.
Power supply circuits 21 can provide galvanic current source for various low voltage equipment (comprising control circuit).Man-machine interaction circuit may be used for realizing man-machine interaction, such as, the running status of PV air-conditioner device shown, and receives the control instruction of user's input to control etc. PV air-conditioner device.
Further, man-machine interaction circuit 22 comprises: display circuit, is connected with control circuit 17, for showing duty and the parameter information of photovoltaic air-conditioner; And key circuit, be connected with control circuit 17, for realizing the Non-follow control to PV air-conditioner device.
Particularly, man-machine interaction circuit 22 comprises display circuit, key circuit etc., realizes the interactive functions such as display, Non-follow control and auditory tone cues.Display circuit is used for working state of system, parameter, statistical information etc. to show in mode intuitively; Key circuit is for realizing the various controlling functions to air-conditioning.
Preferably, PV air-conditioner device also comprises the first filter circuit 23, and this first filter circuit 23 is connected between photovoltaic battery panel 15 and booster circuit 18, filters for the common and different mode interference inputted photovoltaic battery panel 15.
First filter circuit 23 can be photovoltaic input EMI filter circuit, and common and different mode input through photovoltaic battery panel 15 for filtering disturbs, and the protection such as lightning-protection surge.
Preferably, PV air-conditioner device also comprises the second filter circuit 24, and this second filter circuit 24 is connected between utility grid 16 and rectification circuit 13, filters for the high-frequency conduction that produces PV air-conditioner device and radiation.
Second filter circuit 24 can be exchange input EMI filter circuit, and the high-frequency conduction produced when working for filtering convertible frequency air-conditioner and radiation, reduce the interference to utility grid 16.
As shown in Figure 2, PV air-conditioner device also comprises filter inductance 25, and the first end of this filter inductance 25 is connected with utility grid 16, and the second end of filter inductance 25 is connected with relay, for carrying out shaping to the alternating current being incorporated into utility grid 16.Particularly, filter inductance 25 can be linked in utility grid 16 by the second filter circuit 24.
When PV air-conditioner device be in generate electricity by way of merging two or more grid systems pattern time, carry out shaping by filter inductance 25 pairs of grid-connected current, the grid-connected current that the electric energy that photovoltaic battery panel is exported is linked into utility grid 16 meets the requirement of utility grid 16.
Below in conjunction with Fig. 2, the PV air-conditioner device of the utility model embodiment is described in detail.
The PV air-conditioner device of the utility model embodiment mainly comprises and exchanges input EMI filter circuit i.e. the second filter circuit 24, full bridge rectifier and rectification circuit 13, pfc circuit 19, power supply circuits 21, control circuit 17, man-machine interaction circuit 22, inverter circuit 12, compressor and air conditioner load 11, photovoltaic input EMI filter circuit i.e. the first filter circuit 23, booster circuit 18 and for relay K 1 ~ K3 part of switch load and relay 14.
Exchange the high-frequency conduction and radiation that produce when input EMI filter circuit is used for the work of filtering convertible frequency air-conditioner, reduce the interference to utility grid.
Full bridge rectifier is used for voltage alternating voltage being changed into pulsation.
Pfc circuit 19 carries out boosting for the voltage of the pulsation exported rectification circuit 13 and obtains the second direct current, and accesses dc bus 20, and pfc circuit 19 also has power factor emendation function simultaneously, makes input voltage and input current homophase.
Power supply circuits 21 are for providing galvanic current source for various low voltage equipment.
Compressor flows and State Transferring in air-conditioning duct for driving refrigerant, to realize the refrigeration of air-conditioning or to heat running.
Photovoltaic input EMI filter circuit is used for the common and different mode that filtering input through photovoltaic battery panel and disturbs, and the protection such as lightning-protection surge.
Booster circuit 18, for the low-voltage DC of photovoltaic battery panel 15 is upgraded to high voltage direct current, carries out photovoltaic Maximum Power Output point simultaneously and follows the tracks of (MPPT).
DC inverter both can be that the three-phase alternating current of frequency-adjustable is supplied to compressor by inverter circuit 12, also reversiblely became single-phase or three-phase main-frequency electric current, was incorporated to utility grid 16.
Relay 14 is for switching the load object (compressor or utility grid) of inverter circuit 12.
Man-machine interaction circuit 22 comprises display circuit, key circuit etc., realizes the interactive functions such as display, Non-follow control and auditory tone cues.Display circuit is used for working state of system, parameter, statistical information etc. to show in mode intuitively; Key circuit is for realizing the various controlling functions to air-conditioning.
Control circuit 17 comprises master controller, sampling and modulate circuit, protection circuit, drive circuit etc.The different analog signals such as sampling and the main sampled voltage of modulate circuit, electric current, frequency, phase place, temperature, line level of going forward side by side is changed, and is entered into master controller; Protection circuit, mainly for overvoltage, overcurrent, the abnormal conditions such as overheated, controls the protection of power device emergency shutdown, to ensure element, equipment and personal safety; Drive circuit provides enough drive currents, to control the timely conducting of power device and shutoff.
Above-mentioned booster circuit 18 has MPPT function, gathers photovoltaic current output voltage and electric current by MPPT algorithm, and rated output, and control the maximum power point following the trail of photovoltaic battery panel output.
Above-mentioned PV air-conditioner utensil has islanding detect function, by islanding detect algorithm sampling utility grid voltage, when utility grid power down being detected, load is switched to compressor to disconnect the electrical connection of inverter circuit and utility grid in time.
Above-mentioned PV air-conditioner utensil has network voltage detection function, can the amplitude of detection of grid voltage, frequency and phase information, and by these information transmission in master controller, controls inverter circuit 12 and work in and net state.
The PV air-conditioner utensil of the utility model embodiment has following several mode of operation as follows:
1. common air-conditioning pattern: relay K 1 ~ K3 is closed to A point, PV air-conditioner device switches to air conditioning mode, the AC conversion of utility grid 16 is be sent to dc bus 20 after high voltage direct current by rectification circuit 13 and pfc circuit 19 by control circuit 17, controlling booster circuit 18 makes its output voltage (i.e. the first galvanic voltage) be less than the output voltage (i.e. the second galvanic voltage) of pfc circuit 19, then the output of booster circuit 18 is by dc bus 20 voltage clamp, PV air-conditioner device consumes the energy of utility grid 16, this pattern is identical with common air-conditioning mode of operation.
2. photovoltaic power supply pattern: relay K 1 ~ K3 is closed to A point, PV air-conditioner device switches to air conditioning mode, control circuit 17 controls to be sent to dc bus 20 after the output voltage of photovoltaic battery panel 15 boosts by booster circuit 18, controlling pfc circuit 19 makes its output voltage (i.e. the second galvanic voltage) be less than the output voltage (i.e. the first galvanic voltage) of booster circuit 18, then the output of pfc circuit 19 is by dc bus 20 voltage clamp, and PV air-conditioner device consumes the energy of photovoltaic battery panel input.
3. mixed powering mode: relay K 1 ~ K3 is closed to A point, PV air-conditioner device switches to air conditioning mode, control circuit 17 controls booster circuit 18 and pfc circuit 19 respectively, making the output voltage of the two identical is that the first direct current is identical with the second galvanic voltage, jointly for dc bus 20 provides energy, air conditioner load 11 obtains work institute energy requirement from dc bus 20.
4. to generate electricity by way of merging two or more grid systems pattern: relay K 1 ~ K3 is closed to B point, PV air-conditioner device switches to the pattern of generating electricity by way of merging two or more grid systems, the sample voltage of utility grid 16 of control circuit 17 obtains electric network information (voltage, amplitude, phase place etc.), control circuit 17 controls booster circuit 18 to be made its output voltage (i.e. the first galvanic voltage) higher than the output voltage (i.e. the second galvanic voltage) of pfc circuit 19 or cuts off pfc circuit 19, by photovoltaic battery panel 15 for dc bus 20 provides energy, controlling inverter circuit 12 is alternating current by the inversion of dc bus 20 voltage, be incorporated in utility grid 16.
Above-mentioned several mode of operation is not changeless, and the mode of operation of PV air-conditioner device changes with the power output of photovoltaic battery panel and the change of air conditioner load power demand.Such as, because the power output of photovoltaic battery panel 15 changes greatly by illumination, the impact of blocking, when working in air conditioning mode, priority task is in 2. photovoltaic power supply pattern, when the power output of photovoltaic battery panel 15 is less than air-conditioning power demand, PV air-conditioner device switches to 3. hybrid power supply pattern, and when photovoltaic input voltage is lower than the minimum input voltage (photograph as unglazed in night or low light situation) of booster circuit 18, PV air-conditioner device switches to 1. common air-conditioning pattern.
Wherein, when illumination is lower, the power output of solar photovoltaic cell panel is less, now photovoltaic power output is lower, during the work of PV air-conditioner device, relay K 1 ~ K3 adhesive to A point, PV air-conditioner device device now operationally still by mains-supplied, its working method and common air-conditioning working method completely the same.
When illumination is more sufficient, and when needing to open PV air-conditioner device, relay K 1 ~ K3 adhesive, to A point, provides PV air-conditioner device to run institute's energy requirement by photovoltaic DC-to-AC converter.
When PV air-conditioner device operate power is greater than the power that photovoltaic battery panel provides, PV air-conditioner device is jointly provided to run institute's energy requirement by photovoltaic battery panel and utility grid.
When illumination is more sufficient, and during without the need to opening PV air-conditioner device, relay K 1 ~ K3 adhesive is to B point, and photovoltaic DC-to-AC converter is started working, and the energy that photovoltaic battery panel exports is fed to utility grid.
The utility model embodiment still provides a kind of PV air-conditioner system.This PV air-conditioner system comprises: PV air-conditioner device, and PV air-conditioner device is connected with utility grid; Photovoltaic battery panel, is connected with PV air-conditioner device, for providing electric energy to PV air-conditioner device.Wherein, the PV air-conditioner device that provides for the utility model embodiment of PV air-conditioner device.Specific descriptions about PV air-conditioner system see the description of the utility model above-described embodiment to PV air-conditioner device, can not repeat here.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (11)
1. a PV air-conditioner device, is characterized in that, comprising:
Air conditioner load;
Inverter circuit, the AC of described inverter circuit is connected with utility grid respectively with described air conditioner load, and the DC side of described inverter circuit is connected with photovoltaic battery panel, and the DC conversion for being exported by described photovoltaic battery panel is alternating current;
Rectification circuit, is connected between described inverter circuit and described utility grid, and the AC conversion for described utility grid being exported is direct current; And
Relay, be connected between the AC of described inverter circuit and described air conditioner load, and be connected between the AC of described inverter circuit and described utility grid, the moving position of the movable contact of described relay comprises primary importance and the second place, when described movable contact is in primary importance, the AC of described inverter circuit and described air conditioner load are connected, when described movable contact is in the second place, AC and the described utility grid of described inverter circuit are connected.
2. PV air-conditioner device according to claim 1, it is characterized in that, described PV air-conditioner device also comprises: control circuit, be connected with described relay, when described movable contact is in the second place, described control circuit is used for controlling described movable contact when producing island effect and is switched to primary importance, wherein, when described movable contact is in described primary importance, AC and the described utility grid of described inverter circuit disconnect.
3. PV air-conditioner device according to claim 2, is characterized in that, described control circuit comprises:
Sampling and modulate circuit, for the electric network information of described utility grid of sampling; And
Master controller, is connected with described sampling and modulate circuit, for carrying out logical operation according to the sampled signal received, controls the connection status of relay.
4. PV air-conditioner device according to claim 2, is characterized in that, the direct current that described rectification circuit exports is the direct current of the voltage with pulsation, and described PV air-conditioner device also comprises:
Booster circuit, between the DC side being connected to described photovoltaic battery panel and described inverter circuit, boosts for the direct current exported described photovoltaic battery panel, obtains the first direct current; And
Pfc circuit, between the DC side being connected to described rectification circuit and described inverter circuit, the voltage for the pulsation exported described rectification circuit boosts, and obtains the second direct current,
Wherein, described booster circuit and described pfc circuit are all connected by the DC side of dc bus with described inverter circuit.
5. PV air-conditioner device according to claim 4, is characterized in that, described control circuit is connected with described pfc circuit respectively with described booster circuit, wherein,
When described movable contact is in described primary importance, described control circuit exports described second direct current to described dc bus for controlling described pfc circuit, and the first galvanic voltage controlling the output of described booster circuit is less than described second galvanic voltage;
When described movable contact is in described primary importance, described control circuit is used for exporting described first direct current to described dc bus by described booster circuit, and the second galvanic voltage controlling the output of described pfc circuit is less than described first galvanic voltage;
When described movable contact is in described primary importance, described control circuit controls described booster circuit and described pfc circuit respectively, makes described first direct current identical with described second galvanic voltage;
When described movable contact is in the described second place, described control circuit is for the electric network information of described utility grid of sampling, and controlling the second direct current that the first galvanic voltage that described booster circuit exports exports higher than described pfc circuit or the connection controlling to cut off described pfc circuit, described control circuit is also that alternating current is incorporated in described utility grid for controlling described inverter circuit by the voltage inversion of described dc bus.
6. PV air-conditioner device according to claim 4, is characterized in that, described PV air-conditioner device also comprises:
Power supply circuits, are connected with described control circuit respectively with described dc bus, for providing direct current energy to described control circuit;
Man-machine interaction circuit, is connected with described control circuit, for realizing man-machine data interaction.
7. PV air-conditioner device according to claim 6, is characterized in that, described man-machine interaction circuit comprises:
Display circuit, is connected with described control circuit, for showing duty and the parameter information of described PV air-conditioner device; And
Key circuit, is connected with described control circuit, for realizing the Non-follow control to described PV air-conditioner device.
8. PV air-conditioner device according to claim 4, is characterized in that, described PV air-conditioner device also comprises:
First filter circuit, is connected between described photovoltaic battery panel and described booster circuit, filters for the common and different mode interference inputted described photovoltaic battery panel.
9. PV air-conditioner device according to claim 1, is characterized in that, described PV air-conditioner device also comprises:
Second filter circuit, is connected between described utility grid and described rectification circuit, filters for the high-frequency conduction that produces described PV air-conditioner device and radiation.
10. PV air-conditioner device according to any one of claim 1 to 5, is characterized in that, described PV air-conditioner device also comprises:
Filter inductance, the first end of described filter inductance is connected with described utility grid, and the second end of described filter inductance is connected with described relay, for carrying out shaping to the alternating current being incorporated into described utility grid.
11. 1 kinds of PV air-conditioner systems, is characterized in that, comprising:
PV air-conditioner device according to any one of claim 1 to 10, described PV air-conditioner device is connected with utility grid;
Photovoltaic battery panel, is connected with described PV air-conditioner device, for providing electric energy to described PV air-conditioner device.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104980091A (en) * | 2015-06-23 | 2015-10-14 | 四川蜀旺科技有限公司 | Luminous energy storage inversion system |
| WO2016026363A1 (en) * | 2014-08-18 | 2016-02-25 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner and photovoltaic air conditioning system |
| CN107168448A (en) * | 2017-01-16 | 2017-09-15 | 广东美的制冷设备有限公司 | Solar air conditioner control device, solar air conditioner and control method |
| CN114256879A (en) * | 2022-01-27 | 2022-03-29 | 青岛海信日立空调***有限公司 | Photovoltaic air conditioner, control method thereof and photovoltaic air conditioning system |
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2014
- 2014-08-18 CN CN201420467588.7U patent/CN204141794U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016026363A1 (en) * | 2014-08-18 | 2016-02-25 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner and photovoltaic air conditioning system |
| CN104980091A (en) * | 2015-06-23 | 2015-10-14 | 四川蜀旺科技有限公司 | Luminous energy storage inversion system |
| CN107168448A (en) * | 2017-01-16 | 2017-09-15 | 广东美的制冷设备有限公司 | Solar air conditioner control device, solar air conditioner and control method |
| CN114256879A (en) * | 2022-01-27 | 2022-03-29 | 青岛海信日立空调***有限公司 | Photovoltaic air conditioner, control method thereof and photovoltaic air conditioning system |
| WO2023142261A1 (en) * | 2022-01-27 | 2023-08-03 | 青岛海信日立空调***有限公司 | Photovoltaic air conditioner and control method therefor and photovoltaic air conditioner system |
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