WO2003085334A1 - Ameliorations apportees a un systeme de pompe a chaleur a couplages multiples - Google Patents

Ameliorations apportees a un systeme de pompe a chaleur a couplages multiples Download PDF

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Publication number
WO2003085334A1
WO2003085334A1 PCT/CN2003/000153 CN0300153W WO03085334A1 WO 2003085334 A1 WO2003085334 A1 WO 2003085334A1 CN 0300153 W CN0300153 W CN 0300153W WO 03085334 A1 WO03085334 A1 WO 03085334A1
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WO
WIPO (PCT)
Prior art keywords
oil
compressor
pipe
level line
parallel
Prior art date
Application number
PCT/CN2003/000153
Other languages
English (en)
Chinese (zh)
Inventor
Kefang You
Xintian You
Original Assignee
Kefang You
Xintian You
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN 02206127 external-priority patent/CN2554390Y/zh
Priority claimed from CN 03202396 external-priority patent/CN2596284Y/zh
Application filed by Kefang You, Xintian You filed Critical Kefang You
Priority to AU2003211676A priority Critical patent/AU2003211676A1/en
Publication of WO2003085334A1 publication Critical patent/WO2003085334A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/06—Several compression cycles arranged in parallel
    • F25B2400/061—Several compression cycles arranged in parallel the capacity of the first system being different from the second

Definitions

  • the present invention relates to improvements in multi-junction heat pump systems, and in particular to improvements in system oil performance and defrosting performance.
  • CN 1097711C discloses the invention of "multiple refrigeration compressor oil equalization devices" to improve the oil supply performance of the system.
  • the multi-refrigeration compressor oil-removing automatic control device failed to solve the problem of lack of oil after the compressor that was originally stopped working alone, and failed to prevent any one of the compressors from being shut down in the absence of oil, and the oil was shut off during the shutdown. If the compressor is started separately in the absence of oil, there will be a consequence of continued oil shortage and burning of the compressor; and because the device lacks measures to quickly establish oil pressure, oil breakage may occur when the compressor is started in a low temperature environment.
  • the suction port of the known moving parts of the compressor is placed in the lower position of the oil pool.
  • the machine After the machine is stopped for a period of time, it will start, and the lean layer in the lower position will be sucked first. Since the compressor accumulates in the oil sump after shutdown in a low temperature environment, it is mutually soluble with the lubricating oil to form a higher-position rich layer and a lower-position lean layer. Excessive refrigerant contained in the lean layer is sucked into the pressure chamber by the compressor. The refrigerant is vaporized and evaporated to increase the pressure of the medium pressure chamber, which blocks the feeding of the lubricating oil to the high-pressure moving parts. The oil pressure cannot be established and reaches the high pressure. Moving parts, high-pressure moving parts are not lubricated and cooled by oil, causing the temperature to rise continuously to burn out the compressor.
  • the "Heat Pump Air Conditioner Operation Control Method" published in the JP 312281/86 publication uses a scheme in which the compressor simultaneously decompresses the compression of the outdoor heat exchanger and the indoor heat exchanger, but the heat pump system is eliminated.
  • the circulation circuit, the program can provide limited defrosting heat, low defrosting efficiency and system instability. Summary of the invention
  • the present invention provides a multi-joint heat pump system improvement scheme, including an improved compressor parallel oil supply device.
  • pre-evaporation defrosting device which can make any compressor start without oil shortage, tend to be rich when running, and keep oil when it stops.
  • the system does not stop heating when defrosting, and obviously improves the comfort of indoor temperature in winter.
  • the heat pump system only has one oil separator, the oil separator is placed at the same level as each compressor, and the lowest working oil level line, the system stable oil level line and the pre-filled oil level line are determined from the bottom up, each compressor A pair of guide oil pipes are drawn at the bottom, so that each high-pressure oil pool is juxtaposed with the bottom of the oil separator through the respective oil guiding tubes.
  • One end of the oil guiding tube is open at the lean layer at the bottom of the oil pool, and the lean oil layer is first drained through the oil guiding tube when the compressor starts.
  • the oil separator is retained in the oil reservoir, and the oil level is reduced and maintained at the lowest working oil level line.
  • the high-pressure moving parts are continuously lubricated and cooled by the oil, and the compressor can work normally, avoiding the oil-breaking phenomenon that occurs in the compressor in the low-temperature environment due to the failure of the oil pressure to be established;
  • a return pipe is taken out from the bottom of the oil separator, and the return pipe is connected to an inlet of the oil pipe through a pressure limiter, and the ends of the oil pipes which are branched from the oil pipe are juxtaposed with the suction pipes at the near suction port of the corresponding compressor respectively.
  • the ends of the oil traps are tightly nested inside the corresponding suction pipe and provided with an oil hole.
  • the high-speed airflow in the suction pipe disperses the oil droplets into a mist and is taken up by the compressor, because the amount of oil that the compressor draws from the oil hole is not less than the oil discharged from the exhaust port by the compressor. Therefore, any compressor tends to be rich in oil during operation, which avoids the phenomenon that the amount of oil returned to each compressor in the prior art is uneven and lacks oil;
  • the other end of the oil guiding pipe is flush with the system stable oil level line in the oil separator.
  • the oil discharged from the compressor in operation causes the oil level of the oil separator to rise and exceed the system stable oil level line.
  • Gravity action through the other oil guiding pipe to actively introduce lubricating oil into the compressor in the shutdown, so that the oil level of any unstarted compressor rises after the system is turned on and tends to approach the oil level of the oil separator, so, in the operating system Any uncompressed compressor will not be short of oil, which provides the necessary conditions for the compressor to start without starting the oil, avoiding the lack of oil before the start of the prior art compressor;
  • the oil guiding pipe is provided with an oil guiding hole in the compressor and in the oil separator at the position of the lowest working oil level line, and each compressor and oil separator is filled with lubricating oil and reaches the pre-filling oil level line before the system is opened.
  • each compressor and oil separator is filled with lubricating oil and reaches the pre-filling oil level line before the system is opened.
  • the one end of the liquid infusion tube of the liquid pump in the heat pump circulation system is connected to the collection points of the electronic expansion valves at the rear end of the plurality of indoor heat exchangers, and the other end of the liquid storage tube is connected to an electronic expansion valve.
  • the gas pipe at the top of the liquid reservoir is connected to a solenoid valve and then connected to the outdoor heat exchanger in parallel with the aforementioned electronic expansion valve.
  • the electronic expansion valves at the rear end of several indoor heat exchangers are adjusted. Large, let each inverter compressor run at high frequency, provide more high temperature and high pressure gas, maintain the heating operation of the indoor heat exchanger, open the gas pipe and solenoid valve at the top of the liquid reservoir, and let the liquid in the liquid reservoir The refrigerant is pre-evaporated into medium-temperature and medium-pressure gas and enters the outdoor heat exchanger for defrosting.
  • the invention has the beneficial effects that the compressor can be operated under normal lubrication and cooling conditions, and can effectively defrost without affecting the comfort of the indoor temperature in winter, and has the advantages of simple structure, few components and high reliability. The overall performance of the system has been improved.
  • Figure 1 is a configuration diagram of a first embodiment of an improved multi-junction heat pump system.
  • Figure 2 is a cross-sectional view of the oil hole.
  • FIG. 1 Compressor, 2. Lubricating oil pool, 3. Oil guiding hole, 4. Double-guide oil pipe, 5. Oil separator, 6. Exhaust pipe, 7. Oil return hole, 8. Oil return pipe, 9. Pressure limiter, 10. Oil pipe inlet, 11. Oil pipe end, 12. Oil hole, 13. Check valve, 14. Suction pipe, 15. Oil suction hole, 16. Intake pipe, 17. Outlet pipe, 18 Pre-filled oil level line, 19. System stable oil level line, 20. Minimum working oil level line, 21. Four-way valve, 22. Outdoor heat exchanger, 23. Solenoid valve, 24. Outdoor electronic expansion valve, 25. Storage Liquid, 26. Indoor electronic expansion valve, 27. Indoor heat exchanger
  • a plurality of double-guide oil pipes 4 are taken out from the bottom of the oil separator 5, in order to realize the oil pool of each compressor 1 through the double-guide oil pipe 4 and the bottom of the oil separator 5
  • the opening of the oil guiding pipe 4 at one end of the compressor 1 is set at the bottom of the oil pool 2 below the lowest working oil level line 20, and the other end of the oil guiding pipe 4 is extended from the bottom of the oil separator 5 to the system stable oil level line 19.
  • the wall of the arm is bent and opened.
  • the oil guiding pipe 4 When the compressor 1 is started, the oil guiding pipe 4 first drains the lean layer at the bottom of the oil pool 2 into the oil separator 5 to retain the rich layer in the oil pool 2 Inside, the pressure difference causes the oil pressure to quickly build up and reach the high-pressure moving parts, and the high-pressure moving parts are continuously lubricated and cooled by the oil.
  • the oil discharged from the compressor 1 causes the oil level of the oil separator 5 to rise, and the oil guiding tube 4 in turn causes the oil in the oil separator 5 higher than the system stabilizing oil line 19 to be actively introduced into the oil pool 2 of the compressor 1 that is stopped. in.
  • the oil guiding pipe 4 opens the oil guiding hole 3 in the compressor 1 and in the oil separator 5 according to the lowest working oil line 20, and the communication between the oil guiding pipe 4 and the oil guiding hole 3 makes the compressor 1 when the system is static. And the oil level of the oil separator 5 is balanced on the system stabilizing oil line 19;
  • a return oil pipe 8 is drawn from the bottom of the oil separator 5, and the oil return pipe 8 is connected to an inlet of an adjustable or fixed pressure limiter 9.
  • the outlet of the pressure limiter 9 is connected with the oil inlet pipe inlet 10 to supply oil to the oil collecting pipe after pressure limiting. .
  • the oil return pipe 8-end is opened below the lowest working oil line 20 at the bottom of the oil separator 5. In order to preferentially supply the oil-rich layer portion to the oil pipeline, the opening may also be extended upwards slightly below the system stable oil level line 19 and separated from the oil.
  • the oil return hole 7 is disposed below the lowest working oil level line 20 at the bottom of the device 5, and the other end of the oil return pipe 8 distributes the oil through the oil collecting pipe inlet 10 to the end 11 of each oil collecting pipe, and the end portions 11 of the oil collecting pipes are tightly fitted into the vicinity of the suction port of the corresponding compressor 1.
  • the inside of the suction pipe 14 is provided with an oil hole 12, and FIG.
  • FIG. 2 is a cross-sectional view of the oil hole 12, and the end of the oil pipe end 11 is inserted into the suction pipe 14 to reduce the cross-sectional area of the corresponding portion in the suction pipe 14, The speed of the local air flow is increased, and the oil from the oil hole 12 is atomized by the speed-up airflow and sent to the compressor 1 to supply oil to the compressor 1.
  • the oil guiding pipe 4 opens the oil guiding hole 3 in the compressor 1 and in the oil separator 5 according to the lowest working oil line 20, and the communication between the oil guiding pipe 4 and the oil guiding hole 3 makes the compressor 1 when the system is static.
  • the oil level of the oil separator 5 is balanced on the system stabilizing oil line 19. This ensures the reliability of the oil supply to each compressor 1 of the system, that is, there is no shortage of oil when any compressor is started, it tends to be rich when it is running, and it is constantly oiled when it is stopped.
  • the one-end infusion tube of the accumulator 25 in the system is connected to the collection point of each of the indoor electronic expansion valves 26, and the other end of the accumulator 25 is passed through the infusion tube.
  • the outdoor heat exchanger 22 is connected, and the gas pipe at the top end of the accumulator 25 is connected to the electromagnetic valve 23, and then connected to the outdoor heat exchanger 22 in parallel with the outdoor electronic expansion.
  • the upper solenoid valves 23 together form a pre-evaporation defroster.
  • the indoor electronic expansion valve 26 at the rear end of the plurality of indoor heat exchangers 27 is turned on, and each of the inverter compressors 1 operates at a high frequency to provide more high-temperature and high-pressure gas to maintain the indoors.
  • the heat supply function of the heat exchanger 27 is such that the gas pipe at the top end of the accumulator 25 is opened to the solenoid valve 23, and the liquid refrigerant in the accumulator 25 is pre-evaporated into a medium-temperature medium-pressure gas and enters the outdoor heat exchanger 22 for defrosting.

Abstract

La présente invention concerne un système de pompe à chaleur à couplages multiples qui comprend : une pluralité de compresseurs à cavité sous pression élevée dont la fréquence peut être variable ou non variable ; un dispositif amélioré d'alimentation en huile en parallèle pour les différents compresseurs ; et un dispositif amélioré de dégivrage et pré-vaporisation. Le système de l'invention permet de garantir qu'aucun compresseur ne manque d'huile au cours du démarrage, que les compresseurs reçoivent tous de l'huile en suffisance en cours de fonctionnement, et que l'huile n'arrive pas par intermittence aux compresseurs au cours de l'arrêt. Le système de l'invention n'arrête pas le chauffage pendant l'opération de dégivrage. Par comparaison avec l'état antérieur de la technique, le système précité possède une construction simple, une fiabilité supérieure et un meilleur rendement global.
PCT/CN2003/000153 2002-02-28 2003-02-27 Ameliorations apportees a un systeme de pompe a chaleur a couplages multiples WO2003085334A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003211676A AU2003211676A1 (en) 2002-02-28 2003-02-27 Improvement for multi-coupled heat pump system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN02206127.4 2002-02-28
CN 02206127 CN2554390Y (zh) 2002-02-28 2002-02-28 高压腔压缩机并联给油装置
CN03202396.0 2003-01-05
CN 03202396 CN2596284Y (zh) 2003-01-05 2003-01-05 一种具有预蒸发除霜装置的多联式热泵

Publications (1)

Publication Number Publication Date
WO2003085334A1 true WO2003085334A1 (fr) 2003-10-16

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PCT/CN2003/000153 WO2003085334A1 (fr) 2002-02-28 2003-02-27 Ameliorations apportees a un systeme de pompe a chaleur a couplages multiples

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AU (1) AU2003211676A1 (fr)
WO (1) WO2003085334A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107735625A (zh) * 2015-07-31 2018-02-23 三菱重工制冷空调系统株式会社 制冷机系统
WO2022039703A1 (fr) * 2020-08-21 2022-02-24 Ottonom Mühendi̇sli̇k Çözümleri̇ Tasarim Otomasyon Danişmanlik Anoni̇m Şi̇rketi̇ Procédé de commande de fonctionnement de refroidissement

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0415478A (ja) * 1990-05-10 1992-01-20 Takahashi Kogyo Kk ヒートポンプを使用した解凍、保冷装置
JPH0942788A (ja) * 1995-07-31 1997-02-14 Sanyo Electric Co Ltd 冷凍装置の油面制御装置
JPH10220880A (ja) * 1997-02-07 1998-08-21 Hitachi Ltd 空気調和機
JPH1114171A (ja) * 1997-06-24 1999-01-22 Zexel Corp 空調装置の室外機
JPH11173706A (ja) * 1997-12-08 1999-07-02 Mitsubishi Electric Corp オイルセパレータ
JPH11294907A (ja) * 1998-04-10 1999-10-29 Daikin Ind Ltd 冷凍装置
CN2447696Y (zh) * 2000-10-17 2001-09-12 江苏春兰电器有限公司 双压缩机油位均衡装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0415478A (ja) * 1990-05-10 1992-01-20 Takahashi Kogyo Kk ヒートポンプを使用した解凍、保冷装置
JPH0942788A (ja) * 1995-07-31 1997-02-14 Sanyo Electric Co Ltd 冷凍装置の油面制御装置
JPH10220880A (ja) * 1997-02-07 1998-08-21 Hitachi Ltd 空気調和機
JPH1114171A (ja) * 1997-06-24 1999-01-22 Zexel Corp 空調装置の室外機
JPH11173706A (ja) * 1997-12-08 1999-07-02 Mitsubishi Electric Corp オイルセパレータ
JPH11294907A (ja) * 1998-04-10 1999-10-29 Daikin Ind Ltd 冷凍装置
CN2447696Y (zh) * 2000-10-17 2001-09-12 江苏春兰电器有限公司 双压缩机油位均衡装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107735625A (zh) * 2015-07-31 2018-02-23 三菱重工制冷空调系统株式会社 制冷机系统
CN107735625B (zh) * 2015-07-31 2020-05-08 三菱重工制冷空调系统株式会社 制冷机系统
US11221166B2 (en) 2015-07-31 2022-01-11 Mitsubishi Heavy Industries Thermal Systems, Ltd. Refrigerator system
WO2022039703A1 (fr) * 2020-08-21 2022-02-24 Ottonom Mühendi̇sli̇k Çözümleri̇ Tasarim Otomasyon Danişmanlik Anoni̇m Şi̇rketi̇ Procédé de commande de fonctionnement de refroidissement

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