FR3054025B1 - Position d'injection d'economiseur variable - Google Patents
Position d'injection d'economiseur variable Download PDFInfo
- Publication number
- FR3054025B1 FR3054025B1 FR1756710A FR1756710A FR3054025B1 FR 3054025 B1 FR3054025 B1 FR 3054025B1 FR 1756710 A FR1756710 A FR 1756710A FR 1756710 A FR1756710 A FR 1756710A FR 3054025 B1 FR3054025 B1 FR 3054025B1
- Authority
- FR
- France
- Prior art keywords
- compressor
- injection position
- compression chamber
- economizer
- bore
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C28/12—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
-
- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/10—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member
- F04C18/107—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member with helical teeth
-
- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- 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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
-
- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/21—Pressure difference
- F04C2270/215—Controlled or regulated
-
- 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
-
- 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
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
- F25B1/047—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
-
- 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
- F25B2400/13—Economisers
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2507—Flow-diverting valves
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2509—Economiser valves
-
- 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
- F25B31/006—Cooling of compressor or motor
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
Un compresseur (100) comprend un alésage (20), un rotor (25) disposé à l'intérieur de l'alésage (20), une entrée de compresseur (10) et une sortie de compresseur (30). Le compresseur comprend en outre une chambre de compression (11) définie entre l'alésage (20) et le rotor (25), dans lequel un volume de la chambre de compression se réduit progressivement de l'entrée de compresseur à la sortie de compresseur. Le compresseur comprend un économiseur (44). L'économiseur est raccordé de manière fluidique à la chambre de compression (11). L'économiseur est configuré pour injecter un fluide de travail dans la chambre de compression (11) dans une position d'injection. La position d'injection peut être modifiée selon un état de fonctionnement du compresseur.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201662361817P | 2016-07-13 | 2016-07-13 | |
US62361817 | 2016-07-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR3054025A1 FR3054025A1 (fr) | 2018-01-19 |
FR3054025B1 true FR3054025B1 (fr) | 2021-05-14 |
Family
ID=60782660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1756710A Active FR3054025B1 (fr) | 2016-07-13 | 2017-07-13 | Position d'injection d'economiseur variable |
Country Status (4)
Country | Link |
---|---|
US (2) | US10837445B2 (fr) |
CN (1) | CN107621100B (fr) |
DE (1) | DE102017115623A1 (fr) |
FR (1) | FR3054025B1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110285060B (zh) * | 2019-07-29 | 2023-10-10 | 珠海格力电器股份有限公司 | 具有多重补气结构的压缩机及空调系统 |
CN116480588B (zh) * | 2023-04-18 | 2024-02-23 | 北京通嘉宏瑞科技有限公司 | 定子及真空泵 |
Family Cites Families (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3408826A (en) * | 1967-01-27 | 1968-11-05 | Dunham Bush Inc | Refrigeration system and systems for cooling and controlling compressors |
US4180986A (en) * | 1978-04-25 | 1980-01-01 | Dunham-Bush, Inc. | Refrigeration system on/off cycle |
US4383802A (en) * | 1981-07-06 | 1983-05-17 | Dunham-Bush, Inc. | Oil equalization system for parallel connected compressors |
SE461927B (sv) | 1987-10-15 | 1990-04-09 | Svenska Rotor Maskiner Ab | Roterande deplacementskompressor med anordning foer reglering av dess inre volymfoerhaallande |
DE69414077T2 (de) * | 1993-12-14 | 1999-06-10 | Carrier Corp | Betrieb eines Economisers für Anlagen mit zweistufigem Verdichter |
US6446451B1 (en) | 1998-01-26 | 2002-09-10 | York International Corporation | Variable capacity compressor having adjustable crankpin throw structure |
US5996364A (en) * | 1998-07-13 | 1999-12-07 | Carrier Corporation | Scroll compressor with unloader valve between economizer and suction |
US6196816B1 (en) * | 1998-08-17 | 2001-03-06 | Carrier Corporation | Unequal injection ports for scroll compressors |
US6116046A (en) * | 1999-03-05 | 2000-09-12 | American Standard Inc. | Refrigeration chiller with assured start-up lubricant supply |
JP2001090684A (ja) | 1999-09-22 | 2001-04-03 | Daikin Ind Ltd | スクリュー圧縮機および冷凍装置 |
US6293767B1 (en) * | 2000-02-28 | 2001-09-25 | Copeland Corporation | Scroll machine with asymmetrical bleed hole |
US6520758B1 (en) | 2001-10-24 | 2003-02-18 | Ingersoll-Rand Company | Screw compressor assembly and method including a rotor having a thrust piston |
US6739853B1 (en) * | 2002-12-05 | 2004-05-25 | Carrier Corporation | Compact control mechanism for axial motion control valves in helical screw compressors |
US7100386B2 (en) | 2003-03-17 | 2006-09-05 | Scroll Technologies | Economizer/by-pass port inserts to control port size |
US7278832B2 (en) * | 2004-01-07 | 2007-10-09 | Carrier Corporation | Scroll compressor with enlarged vapor injection port area |
US6973797B2 (en) * | 2004-05-10 | 2005-12-13 | York International Corporation | Capacity control for economizer refrigeration systems |
CN101171464B (zh) * | 2005-05-04 | 2011-11-23 | 开利公司 | 具有变速涡旋压缩机和经济器回路的制冷系统及运行方法 |
WO2007046810A2 (fr) * | 2005-10-20 | 2007-04-26 | Carrier Corporation | Systeme refrigerant a injection de vapeur a basse pression dote d'un cycle economiseur |
US7770376B1 (en) * | 2006-01-21 | 2010-08-10 | Florida Turbine Technologies, Inc. | Dual heat exchanger power cycle |
US8769982B2 (en) * | 2006-10-02 | 2014-07-08 | Emerson Climate Technologies, Inc. | Injection system and method for refrigeration system compressor |
US7674098B2 (en) * | 2006-11-07 | 2010-03-09 | Scroll Technologies | Scroll compressor with vapor injection and unloader port |
CN101334029A (zh) * | 2007-06-29 | 2008-12-31 | 上海汉钟精机股份有限公司 | 半封闭螺杆式制冷压缩机中能量调节机构 |
WO2009048447A1 (fr) | 2007-10-10 | 2009-04-16 | Carrier Corporation | Système de distributeur à tiroir pour compresseur à vis |
CN101532496A (zh) * | 2008-03-11 | 2009-09-16 | 上海日立电器有限公司 | 一种带经济器的容量可调节型转子式压缩机系统 |
WO2010017384A2 (fr) * | 2008-08-07 | 2010-02-11 | Carrier Corporation | Fonctionnement amélioré d'un système de réfrigération |
GB0821275D0 (en) * | 2008-11-20 | 2008-12-31 | Aaf Mcquay Inc | Screw compressor |
CN102356240B (zh) * | 2009-03-16 | 2015-03-11 | 大金工业株式会社 | 螺杆式压缩机 |
JP5334905B2 (ja) * | 2010-03-31 | 2013-11-06 | 三菱電機株式会社 | 冷凍サイクル装置 |
WO2012166338A2 (fr) * | 2011-05-31 | 2012-12-06 | Carrier Corporation | Système de compresseur hybride et procédés |
DE102011051730A1 (de) * | 2011-07-11 | 2013-01-17 | Bitzer Kühlmaschinenbau Gmbh | Schraubenverdichter |
CN104736952B (zh) * | 2012-10-09 | 2016-09-14 | 开利公司 | 离心式压缩机入口导向叶片控制 |
EP3006740B1 (fr) * | 2013-05-30 | 2018-11-14 | Mitsubishi Electric Corporation | Compresseur à vis et dispositif de cycle de réfrigération |
DE102015116324A1 (de) * | 2014-10-08 | 2016-04-14 | Bitzer Kühlmaschinenbau Gmbh | Schraubenverdichter |
US10808699B2 (en) * | 2017-09-28 | 2020-10-20 | Ingersoll-Rand Industrial U.S., Inc. | Suction side slide valve for a screw compressor |
-
2017
- 2017-07-12 DE DE102017115623.2A patent/DE102017115623A1/de active Pending
- 2017-07-13 US US15/648,565 patent/US10837445B2/en active Active
- 2017-07-13 CN CN201710571547.0A patent/CN107621100B/zh active Active
- 2017-07-13 FR FR1756710A patent/FR3054025B1/fr active Active
-
2020
- 2020-11-16 US US17/099,426 patent/US11959483B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN107621100B (zh) | 2021-06-11 |
US20180017059A1 (en) | 2018-01-18 |
US10837445B2 (en) | 2020-11-17 |
FR3054025A1 (fr) | 2018-01-19 |
US20210071668A1 (en) | 2021-03-11 |
DE102017115623A1 (de) | 2018-01-18 |
CN107621100A (zh) | 2018-01-23 |
US11959483B2 (en) | 2024-04-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU118371U1 (ru) | Поршневой насос-компрессор | |
EP2363594A3 (fr) | Pompe à carburant | |
BRPI0815068A2 (pt) | Bomba a vácuo e uso de uma bomba a vácuo | |
CL2008002373A1 (es) | Motor de combustion interna de ciclo dividido, con un conducto de transferencia que posee una valvula de compresion y una valvula de expansion, un equilibrador de presiones de fluido asistido por la presion del fluido en el conducto de transferencia que desvia la valvula de compresion para equilibrar las presiones en la valvula. | |
EP1959143A3 (fr) | Dispositif de contrôle de la pression dans une pompe à huile | |
MX359094B (es) | Dispositivo de suministro de aceite para motor de combustión interna. | |
EP2600004A3 (fr) | Pompe à huile variable | |
FR3054025B1 (fr) | Position d'injection d'economiseur variable | |
MX2017004692A (es) | Bomba de fondo pozo hidraulicamente activada con valvula de marcha. | |
EA201390533A1 (ru) | Дозирующий жидкостной насос и устройство для определения изменения давления для такого насоса | |
EP2865893A3 (fr) | Ensemble de soupape pour compresseur à plateau oscillant variable | |
UA91003C2 (en) | Piston machine | |
CN103470493B (zh) | 一种高压泵头 | |
WO2014207520A8 (fr) | Pompe à carburant haute pression | |
EA201690875A1 (ru) | Диафрагменный насос и клапанное устройство для такого насоса | |
CN104315166B (zh) | 止水阀结构 | |
CN207879563U (zh) | 一种往复泵的缸体结构 | |
CN100465441C (zh) | 弹性密封阀抽油泵 | |
FR3054635B1 (fr) | Detendeur pour la detente d’un gaz liquefie a compensation de pression integree | |
RU2018100476A (ru) | Система добычи нефти | |
SG147377A1 (en) | Miniflow valve | |
CN205560233U (zh) | 一种便携式自动加脂器 | |
CA3002258A1 (fr) | Pompe alternative dotee d'un trou perpendiculaire ameliore | |
FR3071277B1 (fr) | Pompe cryogenique | |
PL421120A1 (pl) | Silnik turbinowy i części składowe do stosowania w nim |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PLFP | Fee payment |
Year of fee payment: 2 |
|
PLFP | Fee payment |
Year of fee payment: 3 |
|
PLFP | Fee payment |
Year of fee payment: 4 |
|
PLSC | Publication of the preliminary search report |
Effective date: 20200731 |
|
PLFP | Fee payment |
Year of fee payment: 5 |
|
PLFP | Fee payment |
Year of fee payment: 6 |
|
PLFP | Fee payment |
Year of fee payment: 7 |