CN202267261U - Vortex frequency conversion parallel connection condensing unit - Google Patents
Vortex frequency conversion parallel connection condensing unit Download PDFInfo
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- CN202267261U CN202267261U CN2011202183329U CN201120218332U CN202267261U CN 202267261 U CN202267261 U CN 202267261U CN 2011202183329 U CN2011202183329 U CN 2011202183329U CN 201120218332 U CN201120218332 U CN 201120218332U CN 202267261 U CN202267261 U CN 202267261U
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Abstract
A vortex frequency conversion parallel connection condensing unit is characterized by comprising at least one fixed frequency compressor and at least one frequency conversion compressor which are in parallel. Compared with a traditional stand-alone fixed frequency unit and a parallel connection fixed frequency unit, the vortex frequency conversion parallel connection condensing unit has large cool quantity regulating range and high coefficient of performance (COP) under low load. After a frequency conversion speed governing system is introduced, a stepless starting mode is adopted, and rotating speed rises stably. When a low refrigeration requirement is needed, the rotating speed is decreased, cool quantity output is reduced, start-stop times of the compressor are reduced, and reduction of compressor efficiency is avoided. The unit is started under low rotating speed, liquid hammer phenomena are avoided, stable suction pressure control and accurate cool quantity control ability are achieved, product quality is improved, and noise pollution is reduced after the rotating speed is slowed down.
Description
Technical field
The utility model relates to a kind of energy saving refrigerator group, relates in particular to the vortex frequency conversion parallel condensing unit that is applied to outdoor version.
Background technology
At present the major technique defective of refrigeration unit mainly contain following some:
1. adopt the refrigeration unit of invariable frequency compressor, use the ON/OFF control mode, starting current is big, shortens electrical machinery life, electrical network is produced impact consume electric power.Periodically start-stop of compressor operating can not effectively move when hanging down refrigerating capacity, and the range of speeds can not be adjusted according to variations in temperature, and pressure of inspiration(Pi) is unstable, and fluctuation range is big, and the actual motion evaporating temperature will be lower than desired value, reduces compressor COP, increases energy consumption.
2. the condensation fan of refrigeration unit adopts the mode of speed regulation of constant speed or multistage speed, can not regulate wind speed continuously, and energy consumption is big, and efficient is low.In the tradition control model, condenser fan is according to the condensing pressure stepped starting, and when condensation temperature was low, condenser fan is start and stop constantly, caused condensing pressure unstable, increased the energy consumption of whole refrigeration system and the energy consumption of fan electromotor.
3. visual control degree is lower, can not be effectively to the running status of unit control, demonstration and data record and communication etc.The hydrojet magnetic valve adopts heating power expansion valve more, and adjustable range is little, and loss of refrigeration capacity is big.
Summary of the invention
The utility model is to the proposition of above problem, and a kind of vortex frequency conversion parallel condensing unit of development has: at least one invariable frequency compressor and at least one frequency-changeable compressor compose in parallel;
Said invariable frequency compressor is connected with the discharge port of gas-liquid separator and the discharge port of pneumatic filter through pipeline with the frequency-changeable compressor inhalation port; The discharge port of said invariable frequency compressor and frequency-changeable compressor is connected with the inhalation port of oil eliminator through exhaust header; On the main leg of described exhaust header, be provided with back pressure transducer; On the branch road pipeline section that the discharge port with invariable frequency compressor and frequency-changeable compressor directly is connected, be respectively equipped with exhaust gas temperature sensor; The discharge port of said oil eliminator links to each other with the inlet of air-cooled condenser via check valve through pipeline; Air-cooled condenser is discharged port and is linked to each other with the inhalation port of reservoir through pipeline;
The discharge port of reservoir is connected with liquid-sighting glass via device for drying and filtering through pipeline; Pipeline section between said device for drying and filtering and the liquid-sighting glass has the branch road pipeline section, and this branch road pipeline section is connected with liquid filter;
Said liquid filter (1A) is discharged port and is connected with the hydrojet port of said invariable frequency compressor and frequency-changeable compressor respectively through pipeline; On the branch road pipeline that connects said invariable frequency compressor, be in series with electric expansion valve, on the branch road pipeline that connects said frequency-changeable compressor, be in series with electric expansion valve;
The pneumatic filter that is used for filtering evaporator gas is connected with evaporimeter, discharges port and is connected with the inlet of said gas-liquid separator through pipeline, on this pipeline, is provided with the suction temperature sensor; On the pipeline between said suction temperature sensor and the said gas-liquid separator, have branch road, this branch road is connected with oil conservator; Said oil conservator is connected with frequency-changeable compressor with said invariable frequency compressor through parallel pipeline; On the branch road pipeline section of this parallel pipeline, be provided with the fuel feeding magnetic valve;
Gas-liquid separator is connected with frequency-changeable compressor with invariable frequency compressor through pipeline, and the port of export of said gas-liquid separator is provided with low pressure gauge and inspiratory pressure sensor; This pipeline has branch line and is connected with the discharge port of air-cooled condenser;
The discharge port of oil eliminator is connected with the oil conservator inhalation port through pipeline;
Said inspiratory pressure sensor, back pressure transducer, suction temperature sensor, exhaust gas temperature sensor, high-pressure manometer and low pressure gauge are connected with the control substrate;
Said air-cooled condenser has fan governor and condenser fan.
Owing to adopted above-mentioned technical scheme, the utility model compared to before technical scheme have following advantage:
With traditional unit surely frequently unit compare with the fixed frequency of parallel connection unit, it is big to the utlity model has the cold adjustable range, COP is higher under the underload situation.After introducing frequency conversion speed-adjusting system, adopt stepless Starting mode, rotating speed steadily rises; When hanging down refrigeration demand, reduce rotating speed, reduce cold output, reduce compressor start-stop number of times, avoid the compressor efficiency reduction; The slow-speed of revolution starts, and avoids the generation of liquid hit phenomenon; Stable pressure of inspiration(Pi) control, the cold control ability improves marketing quality more accurately; Rotating speed has reduced noise pollution after reducing.
The fan speed-regulating control system of the air-cooled condenser that unit uses carries out the electrodeless adjusting of rotating speed according to condensation temperature, and specific efficiency is higher, more energy-conservation mutually with multistage speed fan system.The condenser speed regulating control can reduce the condensing pressure fluctuation, makes condensing pressure more stable, helps reducing the energy consumption of whole unit.
The electric expansion valve spray system that has is compared the heating power expansion valve spray system, and compressor exhaust temperature is more stable, and loss of refrigeration capacity is little.Control substrate visualized management, the output of alarm code, alarm storage, the online adjustment of parameter, functions such as data communication improve the automation control program of unit greatly.
During unit operation, if wherein a compressor breaks down, another compressor can be kept the refrigeration requirement that part meets, thereby the reliability of refrigeration system is improved greatly.
Description of drawings
The utility model has accompanying drawing 1 width of cloth, wherein
Fig. 1. be the kind of refrigeration cycle sketch map of the utility model;
Among the figure: 1A. filter, 1B. filter, 2. gas-liquid separator, 3. oil level controllers, 4. invariable frequency compressor 4,5A electric expansion valve, 5B electric expansion valve, 6. frequency converter, 7. frequency-changeable compressor, 8. exhaust gas temperature sensor; 9. oil eliminator, 10. back pressure transducer, 11A. fuel feeding magnetic valve A, 11B fuel feeding electromagnetism B, 12. check valves, 13. control substrates, 14. oil conservators, 15. low pressure gauges, 16. inspiratory pressure sensors, 17. fan governors, 18. condenser fans, 19. air-cooled condensers, 20. high-pressure manometers, 21. reservoirs, 22. suction temperature sensors, 23. devices for drying and filtering, 24. liquid-sighting glass.
The specific embodiment
A kind of vortex frequency conversion parallel condensing unit shown in the kind of refrigeration cycle sketch map of Fig. 1 the utility model; Have the invariable frequency compressor 4 of parallel connection setting and the refrigeration unit that frequency-changeable compressor 7 is formed; When concrete work; As a preferred implementation: frequency-changeable compressor 7 starts earlier when the unit pressure of inspiration(Pi) is high, and invariable frequency compressor 4 starts subsequently; When pressure of inspiration(Pi) reduced, invariable frequency compressor 4 stopped earlier, stopped behind the frequency-changeable compressor 7.
Invariable frequency compressor 4 is transported to oil eliminator 9 with the refrigeration oil that frequency-changeable compressor 7 is discharged through a parallelly connected exhaust header, on the public pipeline section of this parallel pipeline, is provided with back pressure transducer 10.Refrigeration oil is transported to storage in the oil conservator 14 through after separating through pipeline.When the situation of oil starvation appears in invariable frequency compressor 4 or frequency-changeable compressor 7; Be that oil level is when being lower than the alarm oil level; Send the fuel feeding instruction by the compressor bank oil level controllers; And open fuel feeding magnetic valve 11A and fuel feeding magnetic valve 11B, the refrigeration oils that stored up in the oil conservator 14 flow out under gravity or action of pressure, flow in the corresponding compressor that lacks refrigeration oil via connecting line; The mechanism of continuous firing when preventing that as one compressor from not having refrigeration oil, when oil level was lower than the shutdown oil level, compressor shut down, and fuel feeding magnetic valve 11A and fuel feeding magnetic valve 11B continue to open; When the refrigeration oil bit recovery arrived user mode, oil level controllers will send signal, turns off corresponding fuel feeding magnetic valve.
Frequency converter 6 links to each other with frequency-changeable compressor 7; The pressure of inspiration(Pi) signal that SCV1 control substrate 13 is gathered through inspiratory pressure sensor 16; Compare with the air-breathing goal pressure of setting, frequency-changeable compressor 7 carries out PID control, again through the RS485 communication modes; Regulate the output frequency of frequency converter 6, and then the rotating speed of adjustment frequency-changeable compressor 7.
The parallel connection compressor bank, invariable frequency compressor 4 and frequency-changeable compressor 7 link to each other with oil eliminator 9 through exhaust header, and oil eliminator 9 links to each other with air-cooled condenser 19 inlets through check valve 12.Fan governor 17; A preferred implementation adopts the FC1A fan governor the most; Form the condenser fan governing systems with condenser fan 18, FC1A fan governor 17 is adjusted the rotating speed of condenser fan 18 according to condensation temperature linear (fan governor oneself is regulated, make condensation temperature and rotating speed linear); Speed governing is divided into high condensation temperature pattern, middle condensation temperature pattern, low condensation temperature pattern, the corresponding different temperature speed curves of different speed-regulating modes.Thereby reach purpose of energy saving.
Air-cooled condenser 19 outlets link to each other with reservoir 21 inlets; Reservoir 21 outlets link to each other with device for drying and filtering 23, liquid-sighting glass 24; Oil eliminator 9 outages link to each other with oil conservator 14 inlets; Oil conservator 14 links to each other with two compressors respectively through oil feed line, and oil conservator 14 low pressure impulse mouths link to each other with pipeline between gas-liquid separator 2 and the filter 1.SCV1 control substrate 13 links to each other with exhaust gas temperature sensor 8, back pressure transducer 10, inspiratory pressure sensor 16, suction temperature sensor 22, gathers delivery temperature, pressure at expulsion, suction temperature, pressure of inspiration(Pi) signal respectively.SCV1 controls substrate 13; Show delivery temperature, pressure at expulsion, pressure of inspiration(Pi), suction temperature, Historical Alerts code, suction superheat, the exhaust degree of superheat etc.; Can set delivery temperature alarm value, pressure at expulsion alarm value etc.; As a preferred implementation, carry out the transmission of data unit operation through the RS485 communication.
The above; Be merely the preferable specific embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technical staff who is familiar with the present technique field is equal to replacement or changes according to the technical scheme of the utility model and inventive concept thereof in the technical scope that the utility model discloses, and all should be encompassed within the protection domain of the utility model.
Claims (2)
1. vortex frequency conversion parallel condensing unit, it is characterized in that having: at least one invariable frequency compressor (4) and at least one frequency-changeable compressor (7) compose in parallel; Said invariable frequency compressor (4) is connected with the discharge port of gas-liquid separator (2) and the discharge port of pneumatic filter (1B) through pipeline with frequency-changeable compressor (7) inhalation port; The discharge port of said invariable frequency compressor (4) and frequency-changeable compressor (7) is connected through the inhalation port of exhaust header with oil eliminator (9); On the main leg of described exhaust header, be provided with back pressure transducer (10); On the branch road pipeline section that the discharge port with invariable frequency compressor (4) and frequency-changeable compressor (7) directly is connected, be respectively equipped with exhaust gas temperature sensor (8); The discharge port of said oil eliminator (9) links to each other via the inlet of check valve (12) with air-cooled condenser (19) through pipeline; Air-cooled condenser (19) is discharged port and is linked to each other with the inhalation port of reservoir (21) through pipeline;
The discharge port of reservoir (21) is connected with liquid-sighting glass (24) via device for drying and filtering (23) through pipeline; Pipeline section between said device for drying and filtering (23) and the liquid-sighting glass (24) has the branch road pipeline section, and this branch road pipeline section is connected with liquid filter (1A);
Said liquid filter (1A) is discharged port and is connected with the hydrojet port of said invariable frequency compressor (4) with frequency-changeable compressor (7) respectively through pipeline; On the branch road pipeline that connects said invariable frequency compressor (4), be in series with electric expansion valve (5A), on the branch road pipeline that connects said frequency-changeable compressor (7), be in series with electric expansion valve (5B);
The pneumatic filter (1B) that is used for filtering evaporator gas is connected with evaporimeter, discharges port and is connected through the inlet of pipeline with said gas-liquid separator (2), on this pipeline, is provided with suction temperature sensor (22); On the pipeline between said suction temperature sensor (22) and the said gas-liquid separator (2), have branch road, this branch road is connected with oil conservator (14); Said oil conservator (14) is connected with frequency-changeable compressor (7) with said invariable frequency compressor (4) through parallel pipeline; On the branch road pipeline section of this parallel pipeline, be provided with fuel feeding magnetic valve (11);
Gas-liquid separator (2) is connected with frequency-changeable compressor (7) with invariable frequency compressor (4) through pipeline, and on the pipeline that connects, is provided with low pressure gauge (15) and inspiratory pressure sensor (16);
The discharge port of oil eliminator (9) is connected with oil conservator (14) inhalation port through pipeline;
Said inspiratory pressure sensor (16), back pressure transducer (10), suction temperature sensor (22), exhaust gas temperature sensor (8), high-pressure manometer (20) and low pressure gauge (15) are connected with control substrate (13);
2. vortex frequency conversion parallel condensing unit according to claim 1, its characteristic also is: said air-cooled condenser (19) has fan governor (17) and condenser fan (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202183329U CN202267261U (en) | 2011-06-24 | 2011-06-24 | Vortex frequency conversion parallel connection condensing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202183329U CN202267261U (en) | 2011-06-24 | 2011-06-24 | Vortex frequency conversion parallel connection condensing unit |
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| Publication Number | Publication Date |
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| CN202267261U true CN202267261U (en) | 2012-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202183329U Expired - Lifetime CN202267261U (en) | 2011-06-24 | 2011-06-24 | Vortex frequency conversion parallel connection condensing unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705519A (en) * | 2015-11-12 | 2017-05-24 | 新特能源股份有限公司 | Multistage refrigerating device and control method thereof |
| CN110914609A (en) * | 2017-06-08 | 2020-03-24 | 开利公司 | Control method for an economizer of a transport refrigeration unit |
| WO2020177284A1 (en) * | 2019-03-01 | 2020-09-10 | 青岛海尔空调电子有限公司 | Control method and control system for preventing liquid hammer in compressor of air conditioner |
-
2011
- 2011-06-24 CN CN2011202183329U patent/CN202267261U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705519A (en) * | 2015-11-12 | 2017-05-24 | 新特能源股份有限公司 | Multistage refrigerating device and control method thereof |
| CN106705519B (en) * | 2015-11-12 | 2019-04-19 | 新特能源股份有限公司 | Multistage refrigerating plant and its control method |
| CN110914609A (en) * | 2017-06-08 | 2020-03-24 | 开利公司 | Control method for an economizer of a transport refrigeration unit |
| CN110914609B (en) * | 2017-06-08 | 2022-03-25 | 开利公司 | Control method for an economizer of a transport refrigeration unit |
| US11300341B2 (en) | 2017-06-08 | 2022-04-12 | Carrier Corporation | Method of control for economizer of transport refrigeration units |
| WO2020177284A1 (en) * | 2019-03-01 | 2020-09-10 | 青岛海尔空调电子有限公司 | Control method and control system for preventing liquid hammer in compressor of air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: PANASONIC APPLIANCES COMPRESSOR (DALIAN) CO., LTD. Free format text: FORMER NAME: DALIAN SANYO COMPRESSOR CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 116600 Dalian economic and Technological Development Zone, Liaoning Pine Street, No. 8 Patentee after: Panasonic's compressor (Dalian) Co., Ltd Address before: 116600 Dalian economic and Technological Development Zone, Liaoning Pine Street, No. 8 Patentee before: Dalian Sanyo Compressor Co., Ltd. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170126 Address after: 116600 Dalian economic and Technological Development Zone, Liaoning Pine Street, No. 8 Patentee after: Matsushita refrigeration system (Dalian) Co., Ltd. Address before: 116600 Dalian economic and Technological Development Zone, Liaoning Pine Street, No. 8 Patentee before: Panasonic's compressor (Dalian) Co., Ltd |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120606 |
|
| CX01 | Expiry of patent term |