CN104539184A - Efficient transport refrigeration machine - Google Patents
Efficient transport refrigeration machine Download PDFInfo
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- CN104539184A CN104539184A CN201410763894.XA CN201410763894A CN104539184A CN 104539184 A CN104539184 A CN 104539184A CN 201410763894 A CN201410763894 A CN 201410763894A CN 104539184 A CN104539184 A CN 104539184A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention provides an efficient transport refrigeration machine which comprises a compressor, a condenser, a motor, a drying liquid accumulator, an evaporator, a switch power source connected with the motor in series, a control switch and a driver. The switch power source comprises a three-phase resonant converter with a middle tapped transformer. The efficient transport refrigeration machine is provided with the three-phase resonant converter with the middle tapped transformer, and is low in loss and high in power density, the work life of the transport refrigeration machine can be prolonged, and the reliability of the transport refrigeration machine can be improved.
Description
Technical field
The invention belongs to refrigeration machine field, particularly a kind of DC frequency-changing transportation refrigerating machine with the three-phase resonate converter of interphase reactor transformer.
Background technology
In recent years, more domestic cars, commercial vehicle manufacturer develop small-sized business refrigerator car one after another, and this car is converted by car, minibus or commercial vehicle, more attractive in appearance than van, small volume, and be more suitable for city dispensing, future market prospect is considerable.
It is the transport refrigeration unit of its exploitation specially that this type of small-sized business refrigerator car has, and the DC frequency-changing transportation refrigerating machine system of current advanced transport refrigeration unit does not rely on the running of engine and works, without the need to fuel consumption; And automobile in driving process by generator or powered battery for unit; The external civil power of Switching Power Supply is utilized to use, with energy savings during parking.
The course of work of the Switching Power Supply of the transport refrigeration unit used in current small-sized business refrigerator car is by " copped wave ", namely the direct voltage of input is cut into amplitude and equals that the pulse voltage of input voltage amplitude realizes.The duty ratio of pulse is regulated by the controller of Switching Power Supply; Once input voltage is cut into ac square wave, its amplitude just can be raised by transformer or reduce, just can be increased the magnitude of voltage of output by the secondary winding number increasing transformer, finally these AC wave shape just obtain VD after rectifying and wave-filtering.
But use the transportation refrigerating machine of above-mentioned Switching Power Supply to there is switching loss, the surge voltage that can produce when cut-off switch element and the transportation refrigerating machine poor work stability caused because of voltage instability, its loss is high, power density is low, working life and the low problem of reliability.
Summary of the invention
Technical problem to be solved by this invention, for the defect in aforementioned background art and deficiency, a kind of DC frequency-changing transportation refrigerating machine with the three-phase resonate converter of interphase reactor transformer is proposed, its loss is low, power density is high, can improve the working life of transportation refrigerating machine, operating efficiency and reliability.
The present invention is achieved through the following technical solutions above-mentioned purpose:
For the technical disadvantages that the structure of existing refrigerating machine of refrigerated truck exists, redesign a kind of efficient transportation refrigeration machine, comprise compressor, condenser, motor, drying liquid storage device and rapid steamer, described motor is in series with Switching Power Supply, control switch and driver, be connected with an oil scavenger between described compressor and condenser, described Switching Power Supply comprises three-phase inverter.
Further, described its topological structure of three-phase resonate converter is: comprise input voltage Uin, former limit and secondary and all have tapped transformer T, and there are 3 groups of vice-side winding, switch element S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, diode D1, D2, D3, D4, D5, D6, D7, D8, inductance L 1, L2, L3.Above-mentioned switch element can be IGBT, and diode is fast recovery diode.
The concrete annexation of structure of the present invention is: comprise input voltage Uin, former limit and secondary and all have tapped transformer T, switch element S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, diode D1, D2, D3, D4, D5, D6, D7, D8, inductance L 1, L2, L3 and controller, described each switching tube has antiparallel parasitic diode and parasitic capacitance, described transformer T has 3 vice-side winding, first vice-side winding is N3, N4, second vice-side winding is N5, N6, and the 3rd vice-side winding is N7, N8;
Further, the different name end of former limit winding centre tap the first half winding connects the anode of diode D1, the Same Name of Ends of former limit winding centre tap the latter half winding connects the anode of diode D2, the Same Name of Ends of former limit winding centre tap the first half winding N1 is connected with the anode of input voltage Uin with the tie point of the different name end of former limit winding centre tap the latter half winding N2, and the negative terminal of input voltage Uin connects the negative electrode of diode D1, D2;
Further, the first structure exporting phase is: the collector electrode of anode connecting valve element S1, S3 of input voltage Uin, the emitter of negative terminal connecting valve element S2, S4 of input voltage Uin; The emitter of switch element S1 connects the anode of diode D3, the negative electrode of diode D3 connects the Same Name of Ends of first vice-side winding centre tap the first half winding, the different name end of first vice-side winding centre tap the first half winding N3 is connected with the Same Name of Ends of first vice-side winding centre tap the latter half winding N4, and its tie point is connected with one end of inductance L 1, the different name end of first vice-side winding centre tap the latter half winding is connected with the anode of diode D4, the collector electrode of the negative electrode connecting valve element S2 of diode D4; The emitter of switch element S3 is connected with the collector electrode of switch element S4, and the other end of its tie point and inductance L 1 and load are connected;
Further, the second structure exporting phase is: the collector electrode of anode connecting valve element S5, S7 of input voltage Uin, the emitter of negative terminal connecting valve element S6, S8 of input voltage Uin; The emitter of switch element S5 connects the anode of diode D5, the negative electrode of diode D5 connects the Same Name of Ends of second vice-side winding centre tap the first half winding, the different name end of second vice-side winding centre tap the first half winding N5 is connected with the Same Name of Ends of second vice-side winding centre tap the latter half winding N6, and its tie point is connected with one end of inductance L 2, the different name end of second vice-side winding centre tap the latter half winding is connected with the anode of diode D6, the collector electrode of the negative electrode connecting valve element S6 of diode D6; The emitter of switch element S7 is connected with the collector electrode of switch element S8, and the other end of its tie point and inductance L 2 and load are connected;
Further, the 3rd structure exporting phase is: the collector electrode of anode connecting valve element S9, S11 of input voltage Uin, the emitter of negative terminal connecting valve element S10, S12 of input voltage Uin; The emitter of switch element S9 connects the anode of diode D7, the negative electrode of diode D7 connects the Same Name of Ends of the 3rd vice-side winding centre tap the first half winding, the different name end of the 3rd vice-side winding centre tap the first half winding N7 is connected with the Same Name of Ends of the 3rd vice-side winding centre tap the latter half winding N8, and its tie point is connected with one end of inductance L 3, the different name end of the 3rd vice-side winding centre tap the latter half winding is connected with the anode of diode D8, the collector electrode of the negative electrode connecting valve element S10 of diode D8; The emitter of switch element S11 is connected with the collector electrode of switch element S12, and the other end of its tie point and inductance L 3 and load are connected; Controller control switch S1 and S2 alternate conduction, S3 and S4 alternate conduction, S5 and S6 alternate conduction, S7 and S8 alternate conduction, S9 and S10 alternate conduction, S11 and S12 alternate conduction, each output is mutually by resonance circuit that the stray capacitance of respective inductance L 1, L2, L3 and each switch element is formed, the each switch element of conducting when the terminal voltage of each switch element is 0, thus it is open-minded to realize no-voltage.
Further, described driver is DC frequency-changing driver.
Further, an oil scavenger is connected with between described compressor and condenser.
Further, the arbor of described compressor is connected with the rotating shaft on driver by gearbox.
Further, described each diode is fast recovery diode or Schottky diode.
Compared with prior art, efficient transportation refrigeration machine of the present invention has following advantages:
The switching frequency that the DC frequency-changing transportation refrigerating machine with the three-phase resonate converter of interphase reactor transformer utilizes the form of interphase reactor transformer can realize by control circuit control switch element, makes output voltage become predetermined value.
And because electric current flows through negative direction during each switching elements ON, therefore do not produce switching losses.
And because carried out three phase resonance actions, surge voltage during cut-off switch element also can not be produced.
While realizing energy feedback, utilize the parasitic capacitance of inductance and switch element to form Sofe Switch form, do not have unnecessary power capacity, its loss is low, and power density is high, can improve the working life of transportation refrigerating machine, operating efficiency and reliability.
Accompanying drawing explanation
Fig. 1: transportation refrigerating machine structural representation of the present invention;
Fig. 2: the structural representation with the three-phase resonate converter of interphase reactor transformer of the present invention;
Fig. 3: the control impuls sequential chart of switch element S1, S2, S3, S4.
Wherein, 1-compressor, 11-arbor, 2-condenser, 3-motor, 4-drying liquid storage device, 5-driver, 51-rotating shaft, 6-conduit, 7-gearbox, 8-oil scavenger, 9-speed changer, U
in-input voltage, T-tapped transformer, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12-switch element, D1, D2, D3, D4, D5, D6, D7, D8-diode, L1, L2, L3-inductance, N1-former limit winding centre tap the first half winding, N2-former limit winding centre tap the latter half winding, N3, N4-first vice-side winding, N5, N6-second vice-side winding, N7, N8 the-the 3rd vice-side winding.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
As shown in Figure 1, transportation refrigerating machine of the present invention comprises compressor 1, condenser 2, motor 3, drying liquid storage device 4 and rapid steamer not shown in the diagram, described motor 3 is in series with Switching Power Supply, control switch and driver 5, described Switching Power Supply comprises the three-phase resonate converter with interphase reactor transformer, and described condenser 2 is communicated with drying liquid storage device 4 with compressor 1 by conduit 6.Described compressor 1 is connected by speed changer 9 with motor 3 (this motor can adopt direct current variable frequency motor); When refrigerator car travels, described motor 3 drives work (automobile power source refers to mobile generator or storage battery) by DC frequency-changing actuator electrical by automobile power source; When refrigerator car switch-off, control switch cuts off automobile power source automatically, external civil power for motor 3 provides the energy, is connected with an oil scavenger 8 by Switching Power Supply between compressor 1 and condenser 2, and the arbor 11 of compressor 1 is connected with the rotating shaft 51 on driver 5 by gearbox 7.
Three-phase resonate converter of the present invention comprises input voltage Uin, former limit and secondary and all has tapped transformer T, switch element S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, diode D1, D2, D3, D4, D5, D6, D7, D8, inductance L 1, L2, L3 and controller, described each switching tube has antiparallel parasitic diode and parasitic capacitance, described transformer T has 3 vice-side winding, first vice-side winding is N3, N4, second vice-side winding is N5, N6, and the 3rd vice-side winding is N7, N8;
The different name end of former limit winding centre tap the first half winding connects the anode of diode D1, the Same Name of Ends of former limit winding centre tap the latter half winding connects the anode of diode D2, the Same Name of Ends of former limit winding centre tap the first half winding N1 is connected with the anode of input voltage Uin with the tie point of the different name end of former limit winding centre tap the latter half winding N2, and the negative terminal of input voltage Uin connects the negative electrode of diode D1, D2;
First structure exporting phase is: the collector electrode of anode connecting valve element S1, S3 of input voltage Uin, the emitter of negative terminal connecting valve element S2, S4 of input voltage Uin; The emitter of switch element S1 connects the anode of diode D3, the negative electrode of diode D3 connects the Same Name of Ends of first vice-side winding centre tap the first half winding, the different name end of first vice-side winding centre tap the first half winding N3 is connected with the Same Name of Ends of first vice-side winding centre tap the latter half winding N4, and its tie point is connected with one end of inductance L 1, the different name end of first vice-side winding centre tap the latter half winding is connected with the anode of diode D4, the collector electrode of the negative electrode connecting valve element S2 of diode D4; The emitter of switch element S3 is connected with the collector electrode of switch element S4, and the other end of its tie point and inductance L 1 and load are connected;
Second structure exporting phase is: the collector electrode of anode connecting valve element S5, S7 of input voltage Uin, the emitter of negative terminal connecting valve element S6, S8 of input voltage Uin; The emitter of switch element S5 connects the anode of diode D5, the negative electrode of diode D5 connects the Same Name of Ends of second vice-side winding centre tap the first half winding, the different name end of second vice-side winding centre tap the first half winding N5 is connected with the Same Name of Ends of second vice-side winding centre tap the latter half winding N6, and its tie point is connected with one end of inductance L 2, the different name end of second vice-side winding centre tap the latter half winding is connected with the anode of diode D6, the collector electrode of the negative electrode connecting valve element S6 of diode D6; The emitter of switch element S7 is connected with the collector electrode of switch element S8, and the other end of its tie point and inductance L 2 and load are connected;
3rd structure exporting phase is: the collector electrode of anode connecting valve element S9, S11 of input voltage Uin, the emitter of negative terminal connecting valve element S10, S12 of input voltage Uin; The emitter of switch element S9 connects the anode of diode D7, the negative electrode of diode D7 connects the Same Name of Ends of the 3rd vice-side winding centre tap the first half winding, the different name end of the 3rd vice-side winding centre tap the first half winding N7 is connected with the Same Name of Ends of the 3rd vice-side winding centre tap the latter half winding N8, and its tie point is connected with one end of inductance L 3, the different name end of the 3rd vice-side winding centre tap the latter half winding is connected with the anode of diode D8, the collector electrode of the negative electrode connecting valve element S10 of diode D8; The emitter of switch element S11 is connected with the collector electrode of switch element S12, and the other end of its tie point and inductance L 3 and load are connected;
Export for first: the first each switch element S1 ~ S4 exporting phase carries out alternate conduction and shutoff by controller according to the pulse sequence figure of Fig. 3; From circuit structure and above-mentioned pulse sequence figure, at S1, S2 blocking interval, energy in the winding of former limit feeds back to input power by diode D1, D2, and one of them conducting of controller control S3 or S4, resonance circuit is formed by the parasitic capacitance of inductance L and switching tube S1, S2, when the terminal voltage of S1, S2 is 0, conducting S1 or S2, realizes no-voltage open-minded; At S3, S4 blocking interval, one of them conducting of controller control S1 or S2, the resonance circuit formed by the parasitic capacitance of inductance L and switching tube S3, S4, conducting S3 or S4 when the terminal voltage of S3, S4 is 0, thus it is open-minded to realize no-voltage.Other two driving pulses exporting phase are according to corresponding relation advanced or delayed 120 ° respectively, and control mode and first exports similar, belongs to basic phase-shift control mode, repeats no more.
Above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, the those of ordinary skill in described field is to be understood that: still can modify to the specific embodiment of the present invention or replace on an equal basis, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. an efficient transportation refrigeration machine, comprise compressor, condenser, motor, drying liquid storage device and rapid steamer, described motor is in series with Switching Power Supply, control switch and driver, an oil scavenger is connected with between described compressor and condenser, it is characterized in that, described Switching Power Supply comprises three-phase inverter.
2. transportation refrigerating machine as claimed in claim 1, it is characterized in that, described three-phase inverter comprises input voltage Uin, former limit and secondary all have tapped transformer T, switch element S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, diode D1, D2, D3, D4, D5, D6, D7, D8, inductance L 1, L2, L3 and controller, described each switching tube has antiparallel parasitic diode and parasitic capacitance, described transformer T has 3 vice-side winding, first vice-side winding is N3, N4, second vice-side winding is N5, N6, 3rd vice-side winding is N7, N8,
The different name end of former limit winding centre tap the first half winding connects the anode of diode D1, the Same Name of Ends of former limit winding centre tap the latter half winding connects the anode of diode D2, the Same Name of Ends of former limit winding centre tap the first half winding N1 is connected with the anode of input voltage Uin with the tie point of the different name end of former limit winding centre tap the latter half winding N2, and the negative terminal of input voltage Uin connects the negative electrode of diode D1, D2;
First structure exporting phase is: the collector electrode of anode connecting valve element S1, S3 of input voltage Uin, the emitter of negative terminal connecting valve element S2, S4 of input voltage Uin; The emitter of switch element S1 connects the anode of diode D3, the negative electrode of diode D3 connects the Same Name of Ends of first vice-side winding centre tap the first half winding, the different name end of first vice-side winding centre tap the first half winding N3 is connected with the Same Name of Ends of first vice-side winding centre tap the latter half winding N4, and its tie point is connected with one end of inductance L 1, the different name end of first vice-side winding centre tap the latter half winding is connected with the anode of diode D4, the collector electrode of the negative electrode connecting valve element S2 of diode D4; The emitter of switch element S3 is connected with the collector electrode of switch element S4, and the other end of its tie point and inductance L 1 and load are connected;
Second structure exporting phase is: the collector electrode of anode connecting valve element S5, S7 of input voltage Uin, the emitter of negative terminal connecting valve element S6, S8 of input voltage Uin; The emitter of switch element S5 connects the anode of diode D5, the negative electrode of diode D5 connects the Same Name of Ends of second vice-side winding centre tap the first half winding, the different name end of second vice-side winding centre tap the first half winding N5 is connected with the Same Name of Ends of second vice-side winding centre tap the latter half winding N6, and its tie point is connected with one end of inductance L 2, the different name end of second vice-side winding centre tap the latter half winding is connected with the anode of diode D6, the collector electrode of the negative electrode connecting valve element S6 of diode D6; The emitter of switch element S7 is connected with the collector electrode of switch element S8, and the other end of its tie point and inductance L 2 and load are connected;
3rd structure exporting phase is: the collector electrode of anode connecting valve element S9, S11 of input voltage Uin, the emitter of negative terminal connecting valve element S10, S12 of input voltage Uin; The emitter of switch element S9 connects the anode of diode D7, the negative electrode of diode D7 connects the Same Name of Ends of the 3rd vice-side winding centre tap the first half winding, the different name end of the 3rd vice-side winding centre tap the first half winding N7 is connected with the Same Name of Ends of the 3rd vice-side winding centre tap the latter half winding N8, and its tie point is connected with one end of inductance L 3, the different name end of the 3rd vice-side winding centre tap the latter half winding is connected with the anode of diode D8, the collector electrode of the negative electrode connecting valve element S10 of diode D8; The emitter of switch element S11 is connected with the collector electrode of switch element S12, and the other end of its tie point and inductance L 3 and load are connected.
3. transportation refrigerating machine as claimed in claim 2, it is characterized in that, described three phase controllers control switch S1 and S2 alternate conduction, S3 and S4 alternate conduction, S5 and S6 alternate conduction, S7 and S8 alternate conduction, S9 and S10 alternate conduction, S11 and S12 alternate conduction, each output is mutually by resonance circuit that the parasitic capacitance of respective inductance L 1, L2, L3 and each switch element is formed, the each switch element of conducting when the terminal voltage of each switch element is 0, thus it is open-minded to realize no-voltage.
4. transportation refrigerating machine as claimed in claim 2, it is characterized in that, wherein said each diode is fast recovery diode or Schottky diode.
5. transportation refrigerating machine as claimed in claim 1, it is characterized in that, described driver is DC frequency-changing driver.
6. transportation refrigerating machine as claimed in claim 1, it is characterized in that, the arbor of described compressor is connected with the rotating shaft on driver by gearbox.
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| CN201410763894.XA CN104539184A (en) | 2014-12-12 | 2014-12-12 | Efficient transport refrigeration machine |
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