CN104734311A - Compressor energy control circuit and method and centrifugal water chilling unit - Google Patents
Compressor energy control circuit and method and centrifugal water chilling unit Download PDFInfo
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- CN104734311A CN104734311A CN201310714476.7A CN201310714476A CN104734311A CN 104734311 A CN104734311 A CN 104734311A CN 201310714476 A CN201310714476 A CN 201310714476A CN 104734311 A CN104734311 A CN 104734311A
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- rectification circuit
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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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a compressor energy control circuit and method and a centrifugal water chilling unit. The compressor energy control circuit comprises a rectifying circuit and a charging loop. The rectifying circuit comprises a direct-current side and an alternating-current side. The alternating-current side of the rectifying circuit is connected with a motor of a compressor to convert the alternating current generated by motor reverse rotation into direct current and output the direct current through the direct-current side of the rectifying circuit. The charging loop is connected with the direct-current side of the rectifying circuit to store the direct current output by the direct-current side of the rectifying circuit. By means of the compressor energy control circuit and method and the centrifugal water chilling unit, the effect that waste of energy in an air conditioner is reduced is achieved.
Description
Technical field
The present invention relates to air conditioner field, in particular to a kind of compressor energy steering circuit and control method and centrifugal refrigerating machines.
Background technology
Usually, consuming parts all in air conditioner all needs to be powered by civil power, such as, compressor in air conditioner, blower fan even load, and the power supply of these consuming parts is powered by utility grid, causes the power consumption of air conditioner very large.Inventor finds, in air conditioner, compressor shutdown relies on inertia to stop slowly, and the energy total loss in compressor shutdown process is fallen, and there is the waste of energy.
There is the problem of energy dissipation for air conditioner in prior art, not yet propose effective solution at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of compressor energy steering circuit and control method and centrifugal refrigerating machines, to solve the problem that air conditioner in prior art exists energy dissipation.
To achieve these goals, according to an aspect of the present invention, a kind of compressor energy steering circuit is provided.Compressor energy steering circuit according to the present invention comprises: rectification circuit, this rectification circuit comprises DC side and AC, the AC of rectification circuit is connected with the motor of compressor, and the AC conversion for being produced by motor reversal is direct current, and is exported by the DC side of rectification circuit; And charge circuit, be connected with the DC side of rectification circuit, the direct current that the DC side for storing rectification circuit exports.
Further, charge circuit comprises: storage battery, and storage battery is connected with consuming parts respectively with the DC side of rectification circuit, for storing the direct current of DC side and providing electric energy to consuming parts, wherein, the consuming parts of the air conditioner of consuming parts residing for compressor; And relay, the contact of relay is connected between the AC of rectification circuit and storage battery.
Further, consuming parts is indicator light.
Further, compressor energy steering circuit also comprises: filter capacitor, and filter capacitor is connected to the DC side of rectification circuit, carries out filtering for the direct current exported DC side.
Further, rectification circuit is the inversion unit in the frequency converter of compressor.
To achieve these goals, according to a further aspect in the invention, provide a kind of centrifugal refrigerating machines, this centrifugal refrigerating machines comprises above-mentioned compressor energy steering circuit.
To achieve these goals, according to a further aspect in the invention, a kind of compressor energy control method is provided.Compressor energy control method is used for controlling the energy of compressor, and this compressor energy control method comprises: the alternating current that the motor reversal obtaining compressor produces; Be direct current by AC conversion; And storage direct current.
Further, controlled by the energy of compressor energy steering circuit to compressor, wherein,
Compressor energy steering circuit comprises: rectification circuit, rectification circuit comprises DC side and AC, the AC of rectification circuit is connected with the motor of compressor, and the AC conversion for being produced by motor reversal is direct current, and is exported by the DC side of rectification circuit; And charge circuit, be connected with the DC side of rectification circuit, the direct current that the DC side for storing rectification circuit exports,
Wherein, be that direct current comprises by AC conversion: the feedback signal receiving motor reversal in compressor; Feedback signal based on motor reversal sends instruction to connect charge circuit; And by connect after charge circuit by compressor motor reversal produce AC conversion be direct current.
Further, before the alternating current that the motor reversal obtaining compressor produces, compressor energy control method also comprises; Receive the feedback signal of compressor shutdown; The power supply of compressor is cut off by the feedback signal based on compressor shutdown; And read the time of motor reversal in compressor shutdown to compressor.
Further, while the time of reading motor reversal in compressor shutdown to compressor, compressor energy control method also comprises: to the components and parts sending controling instruction of needs electric discharge, and control command needs the components and parts of electric discharge to discharge for controlling; And control to need the components and parts of electric discharge to discharge based on control command.
Further, store direct current and comprise: stored the direct current after the AC conversion of motor reversal generation by charge circuit, wherein, when motor rotor stops operating, receive the feedback signal that motor rotor stops operating; And send instruction to cut off charge circuit based on the feedback signal that described motor rotor stops operating.
Further, charge circuit comprises storage battery, storage battery is connected with consuming parts respectively with the DC side of rectification circuit, for storing the direct current of DC side and providing electric energy to consuming parts, wherein, the consuming parts of the air conditioner of consuming parts residing for compressor, wherein, the direct current stored by charge circuit after the AC conversion of motor reversal generation is comprised: the direct current after the AC conversion produce motor reversal is stored in storage battery, after cut-out charge circuit, compressor energy control method comprises: starting storage battery is powered to consuming parts, when the electric energy of storage battery is lower than setting threshold, civil power is switched to power to consuming parts from storage battery.
Pass through the present invention; adopt the compressor energy steering circuit comprising rectification circuit and charge circuit; charge circuit is connected by the DC side at compressor rectification circuit; make when after compressor shutdown; the direct current that the motor reversal of compressor produces is stored; so that use for other consuming parts of the air conditioner residing for compressor, thus solve the problem that air conditioner in prior art exists energy dissipation, reach the effect of the waste reducing energy in air conditioner.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the compressor energy steering circuit according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of a kind of preferred compressor energy steering circuit according to the embodiment of the present invention;
Fig. 3 is the flow chart of compressor energy control method according to a first embodiment of the present invention;
Fig. 4 is the flow chart of compressor energy control method according to a second embodiment of the present invention; And
Fig. 5 is the flow chart of compressor energy control method according to a third embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that embodiments of the invention described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiments provide a kind of compressor energy steering circuit.
Fig. 1 is the schematic diagram of compressor energy steering circuit according to a first embodiment of the present invention.As shown in Figure 1, this compressor energy steering circuit comprises rectification circuit 1 and charge circuit 2.
Rectification circuit 1 comprises DC side 12 and AC 11, and the AC 11 of rectification circuit 1 is connected with the motor M of compressor, is direct current, and is exported by the DC side 12 of rectification circuit 1 for AC conversion motor M reversion produced.Wherein, compressor can be centrifugal compressor; motor M reversion can refer to the rotor reversion in motor M; when compressor normally works; rotor in motor M rotates forward, and when after compressor shutdown, compressor runs out of steam; the cold media gas refluence impeller reversion of high pressure, the rotor in impeller drive motor is by just changing reversion into.Because powerful air-flow drives, after making compressor shutdown, the rotor in motor M stops rotating forward very soon, and is reversed, until after the air pressure balance of two ends, motor M stops operating by air-flow drive.
Particularly, when air conditioner normally works, can be powered by the civil power of AC network, also can be that the direct current exported by photovoltaic plant is powered, and can also be jointly powered by civil power and photovoltaic plant.When air conditioner uses the civil power of AC network to power, first direct current can be rectified into civil power by frequency converter, again the DC inverter after rectification is become the alternating current of voltage needed for compressor operating and frequency-adjustable, in this course, the rectification circuit 1 of the embodiment of the present invention may be used for the direct current after to commercial power rectification and carries out inversion process, namely the rectification circuit 1 in the present embodiment can for compressor normally work time, the inversion unit in frequency converter.When after compressor shutdown, the motor M reversion of compressor, owing to can induce electromotive force at stator winding when rotor reverses; make motor be in generating state, send alternating current, this alternating current enters over commutation circuit 1 and carries out rectification; be converted into direct current, export from the DC side 12 of rectification circuit 1.Can find out, the rectification circuit 1 of the embodiment of the present invention, when compressor normally works, can use as inverter circuit, after compressor shutdown, can use as rectification circuit.When air conditioner uses the direct current of photovoltaic plant to power, directly the direct current of photovoltaic plant can be become the alternating current of voltage needed for compressor operating and changeable frequency through rectification circuit 1 inversion, the use of supply compressor.Certainly, the rectification circuit 1 of the embodiment of the present invention can also be the rectification circuit that the electric energy only for producing the reversion of compressor shutdown rear motor connected in addition carries out rectification.
When after compressor shutdown, motor M is reversed, and motor M is in generating state, is that direct current stores, can reduces the waste of energy by AC conversion motor M reversion produced.
Charge circuit 2 is connected with the DC side 12 of rectification circuit 1, the direct current that the DC side 12 for storing rectification circuit 1 exports.When after compressor shutdown, motor M is reversed, and can connect charge circuit 2, makes charge circuit 2 and rectification circuit 1 form path, thus is stored by the direct current that the DC side 12 of rectification circuit 1 exports.Wherein, charge circuit can be the circuit including storage battery, is stored in storage battery by the direct current that the DC side 12 of rectification circuit 1 exports by charge circuit.Wherein, the electric energy of storage may be used for other consuming parts use of the air conditioner supplied residing for compressor, the indicator light etc. of such as air conditioner
According to the embodiment of the present invention; charge circuit is connected by the DC side at compressor rectification circuit; make when after compressor shutdown; the direct current that the motor reversal of compressor produces is stored; so that use for other consuming parts of the air conditioner residing for compressor; thus solve the problem that air conditioner in prior art exists energy dissipation, reach the effect of the waste reducing energy in air conditioner.
As shown in Figure 2, rectification circuit can be three-phase PWM (pulse width modulation) rectification circuit, also can be Intelligent Power Module, wherein, rectification circuit comprises IGBT(Insulated Gate Bipolar Transistor, insulation bipolar transistor) pipe V1, V2, V3, V4, V5 and V6, each IGBT manages correspondingly reversal connection diode, by controlling the grid of six IGBT pipes, the rectified action to alternating current can be realized.Three terminals A, B and C of motor M are connected respectively to the AC of rectification circuit.
Preferably, charge circuit comprises storage battery S and relay.Storage battery S is connected with consuming parts respectively with the DC side of rectification circuit, and as shown in Figure 2, the two ends of storage battery S are connected to P terminals and the N terminals of rectification circuit DC side.This storage battery S is used for storing the direct current of DC side and providing electric energy to consuming parts, and wherein, the consuming parts of the air conditioner of consuming parts residing for compressor, consuming parts can be the consuming parts such as such as indicator light.The contact K1 of relay is connected between the AC of rectification circuit and storage battery S.
Motor M can be permagnetic synchronous motor, and its rotor is permanent magnet, therefore when the rotor is turning, will induce electromotive force at stator winding.When after compressor shutdown; driven by impeller; rotor in motor M can exist by the process just changing reversion into; in rotor Umklapp process; motor M is in generating state, now contact K1 can be closed, to connect charge circuit by control relay; export control signal control rectification circuit simultaneously and direct current is become to the AC rectification that motor M reversion produces, be stored in storage battery S.
According to the embodiment of the present invention, when motor reversal, by the contact closure of control relay, charge circuit is switched on, the alternating current that motor reversal produces becomes direct current by rectifier circuit rectifies, is stored in storage battery, thus avoids the energy dissipation of compressor.
Further preferably, consuming parts is indicator light.This indicator light can be for the light-emitting diode as indicator light in air conditioner.After compressor shutdown, the electric energy that motor reversal produces not is very sufficient, and this back electrical energy is uneconomical to the electrical network of civil power, the electric energy of storage can be used for the indicator light supplied in air conditioner, for the indicator light of air conditioner provides electric energy.As shown in Figure 2, circuit comprises indicator light L1, L2 and L3, and indicator light L1, L2 and L3 can be all the indicator lights adopting light-emitting diode.
According to the embodiment of the present invention, stored by the electric energy that motor reversal is produced, the indicator light of supply air conditioner, thus make the indicator lights such as the light-emitting diode of air conditioner not need to use the electric energy of civil power, reduce the consumption of the electric energy of air conditioner.
As shown in Figure 2, compressor energy steering circuit also comprises filter capacitor C1, and this filter capacitor C1 is connected to the DC side of rectification circuit, carries out filtering for the direct current exported DC side.Particularly, the two ends of filter capacitor C1 are connected to P terminals and the N terminals of rectification circuit DC side.When the alternating current of motor M reversion generation is after rectification circuit becomes direct current, is charged by accumulators S after filter capacitor filtering C1, thus the direct current after rectification is stored in storage battery.
Preferably; rectification circuit in the embodiment of the present invention is the inversion unit in the frequency converter of compressor; when after compressor shutdown; the AC conversion produced by motor reversal by the inversion unit in frequency converter is direct current; and stored by charge circuit, thus the energy that motor reversal produces is carried out transforming and storing.
According to the embodiment of the present invention, by adopting the inversion unit in frequency converter as the rectification circuit of energy steering circuit, thus not needing in air-conditioner set, increase extra rectification list, the energy after to compressor shutdown can be completed and transform and store.
The embodiment of the present invention additionally provides a kind of centrifugal refrigerating machines, and this centrifugal refrigerating machines comprises the compressor energy steering circuit provided in the embodiment of the present invention.By adopting the compressor energy steering circuit of the embodiment of the present invention; make centrifugal refrigerating machines can by after compressor shutdown; the electric energy that motor reversal produces carries out storing and utilizing; thus decrease the energy dissipation of centrifugal refrigerating machines; electric energy simultaneously by producing motor reversal is used, and reduces the power consumption of centrifugal refrigerating machines.
The embodiment of the present invention additionally provides a kind of compressor energy control method.The method may operate on air conditioner.It should be noted that, the compressor energy steering circuit that the compressor energy control method of the embodiment of the present invention can be provided by the embodiment of the present invention controls the energy of compressor, and the compressor energy steering circuit of the embodiment of the present invention also can control the energy of compressor according to the compressor energy control method of the embodiment of the present invention.Certainly, the compressor energy control method of the embodiment of the present invention can also be used for the centrifugal refrigerating machines of the embodiment of the present invention, and the centrifugal refrigerating machines of the embodiment of the present invention also can adopt the compressor energy control method of the embodiment of the present invention to carry out energy hole.
Fig. 3 is the flow chart of the ENERGY METHOD of compressor according to a first embodiment of the present invention.The compressor energy control method of this embodiment may be used for controlling the energy of compressor.As shown in Figure 3, to comprise step as follows for the ENERGY METHOD of this compressor:
Step S101, the alternating current that the motor reversal obtaining compressor produces.
Compressor can be photovoltaic centrifugal compressor; motor reversal can refer to the rotor reversion in motor; when compressor normally works; rotor in motor rotates forward; when after compressor shutdown; compressor runs out of steam, and the cold media gas refluence impeller reversion of high pressure, the rotor in impeller drive motor is by just changing reversion into.Because powerful air-flow drives, after making compressor shutdown, the rotor in motor stops rotating forward very soon, and is reversed by air-flow drive, until after the air pressure balance of two ends, and motor stalls.In the process of motor reversal, due to electromotive force can be induced at stator winding when rotor reverses, make motor be in generating state, send alternating current.Obtain the alternating current that motor reversal produces, so that carried out transforming rear storage by this alternating current, avoid the waste of energy.
AC conversion is direct current by step S102.
After the alternating current that the motor reversal obtaining compressor produces, can be direct current by the AC conversion got.The rectification circuit in the compressor energy steering circuit of the embodiment of the present invention can be adopted to be direct current by AC conversion, also can be the AC conversion adopting other rectification circuit to be produced by motor reversal be direct current.
Step S103, stores direct current.
Being direct current by AC conversion, the direct current after conversion can be stored.Storage battery can be adopted to store the direct current after conversion, thus avoid the waste of energy.For the electric energy stored, may be used for powering to the consuming parts in air conditioner, thus reduce the consumption to civil power.
According to the embodiment of the present invention, by obtaining the alternating current that compressor reverse rotation produces, and be that direct current stores by this AC conversion, thus avoid the waste of the electric energy that compressor reverse rotation produces, solve the problem that air conditioner in prior art exists energy dissipation, reach the effect of the waste reducing energy in air conditioner.
Fig. 4 is the flow chart of compressor energy control method according to a second embodiment of the present invention.The compressor energy control method of this embodiment can be a kind of preferred implementation of the compressor energy control method of above-described embodiment.The compressor energy control method of this embodiment can be controlled by the energy of compressor energy steering circuit to compressor, and wherein, compressor energy steering circuit comprises rectification circuit and charge circuit.
Rectification circuit comprises DC side and AC, and the AC of this rectification circuit is connected with the motor of compressor, and the AC conversion for being produced by motor reversal is direct current, and is exported by the DC side of rectification circuit.Charge circuit is connected with the DC side of rectification circuit, the direct current that the DC side for storing rectification circuit exports.
As shown in Figure 4, to comprise step as follows for this compressor energy control method:
Step S201, the alternating current that the motor reversal obtaining compressor produces.
Compressor can be photovoltaic centrifugal compressor, and motor reversal can refer to the rotor reversion in motor, when compressor normally works; rotor in motor rotates forward; when after compressor shutdown, driven by impeller, the rotor in motor can exist by the process just changing reversion into.Because powerful air-flow drives, after making compressor shutdown, the rotor in motor stops rotating forward very soon, and is reversed by air-flow drive, until after the air pressure balance of two ends, and motor stalls.In the process of motor reversal, due to electromotive force can be induced at stator winding when rotor reverses, make motor be in generating state, send alternating current.Obtain the alternating current that motor reversal produces, so that carried out transforming rear storage by this alternating current, avoid the waste of energy.
Step S202, receives the feedback signal of motor reversal in compressor.
Detector can be previously provided with within the compressor, when motor reversal in compressor, the feedback signal of motor reversal can be sent to main control unit, wherein main control unit can be digital signal processor (DSP), for receiving the feedback signal returning motor reversal from compressor, to process this signal.
Step S203, the feedback signal based on motor reversal sends instruction to connect charge circuit.
After the feedback signal receiving motor reversal in compressor, the feedback signal based on this motor reversal sends the control command controlling charge circuit and connect, to connect charge circuit.Wherein, charge circuit can adopt the charge circuit in the compressor energy steering circuit of the embodiment of the present invention.The instruction sent can be the control command that main control unit sends, and this control command can be the control command for controlling the relay in charge circuit.Control the contact closure of the relay in charge circuit by sending instruction, charge circuit is connected.
Step S204, the AC conversion produced by motor reversal in compressor by the charge circuit after connecting is direct current.
After charge circuit is connected in control, rectification circuit and charge circuit is made to form path.After rectification circuit and charge circuit form path, the alternating current that in compressor, motor reversal produces is through rectifier circuit rectifies, form direct current, then direct current can be stored by charge circuit, thus the AC conversion produced by motor reversal in compressor is direct current.
Step S205, stores direct current.
Being direct current by AC conversion, the direct current after conversion can be stored.Storage battery can be adopted to store the direct current after conversion, thus avoid the waste of energy.For the electric energy stored, may be used for powering to the consuming parts in air conditioner, thus reduce the consumption to civil power.
According to the embodiment of the present invention, the feedback signal of motor reversal in compressor is received by main control unit, and send instruction control connection charge circuit based on the feedback signal of this motor reversal, thus the AC conversion realizing motor reversal in compressor to produce is direct current, in this course, do not need to increase any auxiliary equipment in air conditioner, can complete AC conversion by main control unit output control is direct current.
Preferably, before step S201, compressor energy control method is further comprising the steps of:
The first step, receives the feedback signal of compressor shutdown.
In compressor shutdown moment, by detector, the signal of the compressor shutdown detected can be sent to main control unit as the feedback signal of compressor shutdown, main control unit can receive the feedback signal of this compressor shutdown.After main control unit receives the feedback signal of compressor shutdown, can judge that compressor quits work based on the feedback signal of this compressor shutdown.
Second step, the power supply of compressor is cut off by the feedback signal based on compressor shutdown.
After compressor shutdown, driven by impeller, the rotor in motor can exist by the process just changing reversion into.Compressor after shutdown does not need power supply, and therefore main control unit after the feedback signal receiving compressor shutdown, can send control signal, the power supply of compressor is cut off.Wherein, when air conditioner is powered by the AC network of civil power, control command can be sent to the inversion module in frequency converter by main control unit, to cut off inversion module, thus the power supply of compressor is cut off, reservation rectifier works independently, and this rectifier can be the rectification circuit in the above embodiment of the present invention.
3rd step, reads the time of motor reversal in compressor shutdown to compressor.
After compressor shutdown; rotor in the motor of compressor due to inertia still keep rotate forward; but due to air-flow powerful in compressor; rotor is rotated forward stop very soon; start reversion; read the time of motor reversal in compressor shutdown to compressor, so that calculate the time of carrying out generating electricity.When the motor reversal of compressor, the feedback signal of motor reversal can be sent to main control unit.
According to the embodiment of the present invention; power by cutting off compressor after compressor shutdown; and read the time of motor reversal in compressor shutdown to compressor, thus when the motor of compressor can be avoided to be in generating state, the electric energy sent conflicts with the electric energy of electrical network.
Preferably, while the time of reading motor reversal in compressor shutdown to compressor, compressor energy control method is further comprising the steps of:
Step 1, to the components and parts sending controling instruction needing electric discharge, this control command needs the components and parts of electric discharge to discharge for controlling.
Main control unit is to the components and parts sending controling instruction needing electric discharge, wherein, the components and parts of needs electric discharge can be the components and parts in frequency converter, and such as switching tube and filter capacitor etc. contain the components and parts of electric capacity or inductance, and control command is need the components and parts of electric discharge to carry out the instruction of discharging for controlling.
Step 2, controls to need the components and parts of electric discharge to discharge based on control command.
After receiving this control command, control to need the components and parts of electric discharge to carry out of short duration electric discharge based on this control command.
It should be noted that, the signal that carrying out needing the components and parts of electric discharge discharges can return electric discharge end is to main control unit, and the signal that main control unit can also terminate based on this electric discharge sends instruction and controls to connect charge circuit.
According to the embodiment of the present invention; send control command to control in compressor, to need the components and parts discharged to discharge; to needing electric energy residual in the components and parts of electric discharge or electrostatic to carry out discharge process, thus after improve compressor shutdown, the fail safe in motor reversal power generation process.
Fig. 5 is the flow chart of compressor energy control method according to a third embodiment of the present invention.The compressor energy control method of this embodiment can be a kind of preferred implementation of the compressor energy control method of above-described embodiment.As shown in Figure 5, the compressor energy control method of this embodiment comprises the following steps,
Step S301, the alternating current that the motor reversal obtaining compressor produces.
Compressor can be photovoltaic centrifugal compressor, and motor reversal can refer to the rotor reversion in motor, when compressor normally works; rotor in motor rotates forward; when after compressor shutdown, driven by impeller, the rotor in motor can exist by the process just changing reversion into.Because powerful air-flow drives, after making compressor shutdown, the rotor in motor stops rotating forward very soon, and is reversed by air-flow drive, until after the air pressure balance of two ends, and motor stalls.In the process of motor reversal, due to electromotive force can be induced at stator winding when rotor reverses, make motor be in generating state, send alternating current.Obtain the alternating current that motor reversal produces, so that carried out transforming rear storage by this alternating current, avoid the waste of energy.
Step S302, receives the feedback signal of motor reversal in compressor.
Detector can be previously provided with within the compressor, when motor reversal in compressor, the feedback signal of motor reversal can be sent to main control unit, wherein main control unit can be digital signal processor (DSP), for receiving the feedback signal returning motor reversal from compressor, to process this signal.
Step S303, the feedback signal based on motor reversal sends instruction to connect charge circuit.
After the feedback signal receiving motor reversal in compressor, the feedback signal based on this motor reversal sends the control command controlling charge circuit and connect, to connect charge circuit.Wherein, charge circuit can adopt the charge circuit in the compressor energy steering circuit of the embodiment of the present invention.The instruction sent can be the control command that main control unit sends, and this control command can be the control command for controlling the relay in charge circuit.Control the contact closure of the relay in charge circuit by sending instruction, charge circuit is connected.
Step S304, the AC conversion produced by motor reversal in compressor by the charge circuit after connecting is direct current.
After charge circuit is connected in control, rectification circuit and charge circuit is made to form path.After rectification circuit and charge circuit form path, the alternating current that in compressor, motor reversal produces is through rectifier circuit rectifies, form direct current, then direct current can be stored by charge circuit, thus the AC conversion produced by motor reversal in compressor is direct current.
Step S305, stores the direct current after the AC conversion of motor reversal generation by charge circuit.
After the AC conversion produced by motor reversal is direct current, energy storage device can be set in charge circuit, such as storage battery etc., this direct current is stored by charge circuit.
Step S306, when motor rotor stops operating, receives the feedback signal that motor rotor stops operating.
When motor rotor stops operating, show that electric power generation terminates, now can send to main control unit the feedback signal that motor rotor stops operating, main control unit processes after receiving this feedback signal accordingly, so that control to cut off charge circuit.
Step S307, the feedback signal stopped operating based on motor rotor sends instruction to cut off charge circuit.
After the feedback signal that reception motor rotor stops operating, main control unit can cut off the instruction of charge circuit by sending control, to cut off charge circuit.Particularly, main control unit can to the relay sending controling instruction in charge circuit, thus make the contact of relay disconnect to cut off charge circuit.
Pass through the embodiment of the present invention, after rotor stops operating within the compressor, timely inverse signal is to main control unit, control to cut off charge circuit by main control unit, thus avoid rotor within the compressor stop operating after store electric energy again flow to compressor, cause the waste of electric energy.
Preferably, charge circuit comprises storage battery, and this storage battery is connected with consuming parts respectively with the DC side of rectification circuit, for storing the direct current of DC side and providing electric energy to consuming parts, wherein, the consuming parts of the air conditioner of consuming parts residing for compressor.
Step S305 can be that the direct current after the AC conversion produced by motor reversal is stored in storage battery.
After step S307, compressor energy control method comprises starting storage battery and powers to consuming parts.By the consuming parts in the electric energy of accumulators store supply air conditioner, the indicator light etc. be such as made up of light-emitting diode.
When the electric energy of storage battery is lower than setting threshold, civil power is switched to power to consuming parts from storage battery.
Particularly, when being powered to the consuming parts in air conditioner by storage battery, the electric energy in storage battery can be detected in real time, when the electric energy of storage battery being detected lower than setting threshold, to main control unit feedback signal, main control unit is after receiving to feedback signal, and system is cut off storage battery power supply and turned to mains-supplied.Wherein, setting threshold can set according to the parameter of storage battery.
In actual application; for a 400kW photovoltaic centrifugal chiller; compressor shutdown the energy of feedback can be about about 2kW; this part energy can maintain all LED operation 1-2 days of compressor bank, and such compressor stops once just providing sufficient energy for the light-emitting diode that unit is all every day.1 year can saves energy hundreds of kilowatts.And this energy feedback method does not need to add auxiliary equipment, only needs to work out rational signal controlling logic and executive circuit reasonable in design.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a compressor energy steering circuit, is characterized in that, comprising:
Rectification circuit, described rectification circuit comprises DC side and AC, and the AC of described rectification circuit is connected with the motor of compressor, and the AC conversion for being produced by described motor reversal is direct current, and is exported by the DC side of described rectification circuit; And
Charge circuit, is connected with the DC side of described rectification circuit, the described direct current that the DC side for storing described rectification circuit exports.
2. compressor energy steering circuit according to claim 1, is characterized in that, described charge circuit comprises:
Storage battery, described storage battery is connected with consuming parts respectively with the DC side of described rectification circuit, for storing the direct current of described DC side and providing electric energy to described consuming parts, wherein, the consuming parts of the air conditioner of described consuming parts residing for described compressor; And
Relay, the contact of described relay is connected between the AC of described rectification circuit and described storage battery.
3. compressor energy steering circuit according to claim 2, is characterized in that, described consuming parts is indicator light.
4. compressor energy steering circuit according to claim 1, is characterized in that, described compressor energy steering circuit also comprises:
Filter capacitor, described filter capacitor is connected to the DC side of described rectification circuit, carries out filtering for the direct current exported described DC side.
5. the compressor energy steering circuit according to any one of Claims 1-4, is characterized in that, described rectification circuit is the inversion unit in the frequency converter of described compressor.
6. a centrifugal refrigerating machines, is characterized in that, comprises the compressor energy steering circuit described in any one of claim 1 to 5.
7. a compressor energy control method, is characterized in that, described compressor energy control method is used for controlling the energy of compressor, and described compressor energy control method comprises:
The alternating current that the motor reversal obtaining described compressor produces;
Be direct current by described AC conversion; And
Store described direct current.
8. compressor energy control method according to claim 7, is characterized in that, is controlled by the energy of compressor energy steering circuit to described compressor, wherein:
Described compressor energy steering circuit comprises:
Rectification circuit, described rectification circuit comprises DC side and AC, and the AC of described rectification circuit is connected with the motor of compressor, and the AC conversion for being produced by described motor reversal is direct current, and is exported by the DC side of described rectification circuit; And
Charge circuit, is connected with the DC side of described rectification circuit, the direct current that the DC side for storing described rectification circuit exports,
Wherein, be that direct current comprises by described AC conversion:
Receive the feedback signal of motor reversal described in described compressor;
Feedback signal based on described motor reversal sends instruction to connect described charge circuit; And
The AC conversion produced by motor reversal described in described compressor by the described charge circuit after connecting is described direct current.
9. compressor energy control method according to claim 8, is characterized in that, before the alternating current that the motor reversal obtaining described compressor produces, described compressor energy control method also comprises;
Receive the feedback signal of described compressor shutdown;
The power supply of described compressor is cut off by the feedback signal based on described compressor shutdown; And
Read the time of motor reversal described in described compressor shutdown to described compressor.
10. compressor energy control method according to claim 9, is characterized in that, while the time of reading motor reversal described in described compressor shutdown to described compressor, described compressor energy control method also comprises:
To the components and parts sending controling instruction needing electric discharge, described control command is discharged for controlling the described components and parts of electric discharge that need; And
Control the described components and parts of electric discharge that need based on described control command to discharge.
11. compressor energy control methods according to claim 8, is characterized in that, store described direct current and comprise: stored the described direct current after the AC conversion of described motor reversal generation by described charge circuit, wherein,
When described motor rotor stops operating, receive the feedback signal that described motor rotor stops operating; And
The feedback signal stopped operating based on described motor rotor sends instruction to cut off described charge circuit.
12. compressor energy control methods according to claim 8, it is characterized in that, described charge circuit comprises storage battery, described storage battery is connected with consuming parts respectively with the DC side of described rectification circuit, for storing the direct current of described DC side and providing electric energy to described consuming parts, wherein, the consuming parts of the air conditioner of described consuming parts residing for described compressor
Wherein, the direct current stored by described charge circuit after the AC conversion of described motor reversal generation is comprised: the direct current after the AC conversion produce described motor reversal is stored in described storage battery,
After the described charge circuit of cut-out, described compressor energy control method comprises: start described storage battery and power to described consuming parts; When the electric energy of described storage battery is lower than setting threshold, civil power is switched to power to described consuming parts from described storage battery.
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| CN105689160A (en) * | 2016-01-20 | 2016-06-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Stopping method and device for magnetic suspension centrifugal machine |
| CN108759212A (en) * | 2018-06-15 | 2018-11-06 | 重庆美的通用制冷设备有限公司 | Halt control method, system and the handpiece Water Chilling Units of handpiece Water Chilling Units |
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