WO1992016802A2 - Recuperation et epuration de refrigerant - Google Patents

Recuperation et epuration de refrigerant Download PDF

Info

Publication number
WO1992016802A2
WO1992016802A2 PCT/US1992/001485 US9201485W WO9216802A2 WO 1992016802 A2 WO1992016802 A2 WO 1992016802A2 US 9201485 W US9201485 W US 9201485W WO 9216802 A2 WO9216802 A2 WO 9216802A2
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
inlet
oil
additionally
outlet
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.)
Ceased
Application number
PCT/US1992/001485
Other languages
English (en)
Other versions
WO1992016802A3 (fr
Inventor
Robert E. Young
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ashland LLC
Original Assignee
Ashland Oil Inc
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
Application filed by Ashland Oil Inc filed Critical Ashland Oil Inc
Publication of WO1992016802A2 publication Critical patent/WO1992016802A2/fr
Publication of WO1992016802A3 publication Critical patent/WO1992016802A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • 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
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/002—Collecting refrigerant from a 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
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/005—Service stations therefor
    • F25B2345/0052—Service stations therefor having wheels

Definitions

  • the present invention relates to the field of recovery of 4
  • a compressor means 40 and/or a vacuum pump means 200 withdraw refrigerant from a system to be evacuated for repair or other reasons, and discharge it with suitable heat exchange 20/22 to a liquefaction unit which supplies liquid refrigerant to a purification unit 30 & 90, which in turn feeds a refrigerant recharging system 120, 132, 11 capable of receiving refrigerant from storage means 120 or from new containers of newly purchased refrigerant 170.
  • the process being capable of being controlled by vaiving which alternately switches 256 from the evacuating, purification and admitting of new refrigerant, or optional vacuum pump means 200 for even greater recovery of refrigerant from the system being evacuated.
  • the invention is valuable from both an economic and an
  • the invention can be used for
  • Figure 1 is a schematic diagram of the system of the
  • Figure 2a is a detail of a distiller.
  • Figure 2b is a detail of the storage cylinder useful with the
  • Figure 3 is a isometric view of the front and one side of an
  • Figure 4 is a detail of the can-piercing manifold useful as an 7 optional component of the invention.
  • 38 9 0 Figure 5 is a schematic electric circuit diagram. Description of the Preferred Embodiments
  • inlet/outlet means 10 suction accumulator means 20
  • low-side purifying means 30 compressor means 40
  • secondary coil means 70 purifying means
  • (highside) 90 pump-down manifold means 100, storage means 120, oil injection means 140, virgin refrigerant supply means 170 and 180, vacuum pump means 200, and circulation control means 240.
  • inlet/outlet means 10 is connected to suction accumulator means 20, which includes canister means 21 in heat exchange relationship to external coil 22, and side inlet 24 and an oil drain system comprising electric oil dump valve 26 connected to the bottom of canister means 21 and feeding into used oil reservoir 25, which can be drained through valved outlet 28.
  • the top outlet of canister means 21 feeds compressor means 40 through low side purifying means 30.
  • Compressor means 40 includes oil check valve on suction 43 and oil separator on return 44 with heater 48, which feeds oil back to compressor 42 through solenoid valve 54. Oil separator on return 44 feeds through check valve 59 into hot gas external coil 22, as mentioned above.
  • Cooled vapor from external coil 22 is conducted to secondary coil (condenser) means 70 where it is liquified and then passed through highside purifying means 90, which consists of various check valves and manual valves, pump-down manifold 100 and purification filter dryers.
  • Filter dryer 30 preferably SPORLAN Model 403
  • the liquid refrigerant then flows into storage means 120 which includes 10-pound cylinder 122, which is fitted with gauge glass 128, and protected by safety /vent valves 126, and which is equipped with float switch
  • oil injection means 140 can be used to add oil to the system being charged.
  • Oil injection means 140 consists of reservoir 142, drain valve 144, hand valve 146, solenoid valve 148, check valve 152 and fill part 143 connected to a standard refrigeration serviceman's gauge
  • the contents can be discharged through solenoid valve 132, check valve 134 with hand valve 11 closed so that the refrigerant continues through check valve 242, solenoid valve 244 which is open and through debris screen 214, gauge 216, pressure swftch-75 psig 204, pressure switch-15 psig 206, pressure switch-4 ⁇ g 212 pressure switch-4 psig 208, through 3-way solenoid valve 202 which directs the flow back through line side inlet 24 into canister means 21 and then back to compressor means 40, to recirculate for additional purification until moisture indicator 98 shows sufficient dryness.
  • New or previously stored refrigerant can be added through virgin refrigerant supply means 170 which includes can-tapper (detail from U. S. Patent 4,852,769 to Robertson), 30-pound cylinder connection 180, check valve 186, and solenoid valve 188 with 3-way solenoid valve 202 in the position to feed through its side outlet into canister means 21 and then through compressor means 40, external coil 22, secondary coil means 70, highside purifying means 90 and into storage means 120.
  • can-tapper detail from U. S. Patent 4,852,769 to Robertson
  • 30-pound cylinder connection 180 check valve 186
  • solenoid valve 188 with 3-way solenoid valve 202 in the position to feed through its side outlet into canister means 21 and then through compressor means 40, external coil 22, secondary coil means 70, highside purifying means 90 and into storage means 120.
  • vacuum pump means 200 can be used to pull a strong vacuum on the unit which is to be evacuated. This extracts additional moisture which can be vented to the air and/or additional refrigerant which can be (through piping not shown) also recovered and liquified in secondary coil means 70 for reuse.
  • oil separator 44 which has a ball float switch which opens oil separator 44 to return oil to compressor means solenoid 54 is opened in response to pressure switch 56 sensing 15 psig or more.
  • compressor oil can be drained by opening hand drain valve 45 and new oil added through compressor oil adding port 46.
  • the invention will be better understood by tracing several of the alternatives:
  • solenoid valve 244 open and 3-way solenoid valve 202 set for right-angle flow, refrigerant flows from the system connected to inlet/outlet means 10 through a refrigeration serviceman's gauge set (not shown) into canister means 21 where it is evaporated with vapor moving through low side purifying means 30 and oil check valve on suction into compressor means
  • 3-way solenoid valve 202 is actuated to connect vacuum pump means 200 to the system being evacuated until manually shut off when a sufficiently deep vacuum is achieved. Hand valve 11 can then be closed.
  • Three-way solenoid valve 202 can again be set to right-angle flow by turning rotary control switch 256 and the refrigerant from cylinder ' 122 can be cycled through compressor means 40, having external coil 22, secondary coil means 70, highside purifying means 90, and back to storage means 120. This can be continued until moisture indicator shows a satisfactory moisture level, so that the refrigerant is now suitable for use in recharging other systems.
  • rotary control switch 256 is a 3-port valve with the opening and closing configurations for the various ports controlled by multi-position switch 256 which can be set for any of the various cycles as described herein; e.g., refrigerant recovery, purification, oil recovery, deep vacuum, refrigerant charging, oil addition, etc.
  • Multi-position switch 256 can also control the opening and closing of the various other solenoid valves in the system.
  • the switch positions are labeled with the short-names of the cycles so that, in operation, it is merely necessary to turn the switch to the desired cycle, much as one would set an oven on an electric range.
  • a refrigeration system for recharging can be connected through the above serviceman's gauge set (not shown) and valve 11 opened.
  • Vacuum pump means 200 can be used to fully vacuum if necessary.
  • the system can then be recharged from 20-pound cylinder by opening hand valve 11, pressing charging button 13 to open solenoid valve 132.
  • Oil can additionally be added from reservoir by opening hand valve 11 and solenoid valve 148 to measure the desired quantity of oil from sight glass 142 which can be refilled through inlet 143.
  • Refrigerant can be accurately measured by gauge glass 128 which corrects temperature variations and dispenses a pre-measured volume.
  • a 10-pound refrigerant cylinder can be mounted on a load cell so that the refrigerant recharge is measured by weight.
  • Recharging with Virgin Refrigerant Solenoid valve 132 and 3-way solenoid valve 202 can both be closed, and hand valve 11 and solenoid valve 244 both opened so the refrigerant flows from virgin refrigerant supply means 170 through 11 which is opened and out through the above refrigerant serviceman's gauge set into the new system. Oil can be added from oil injection means 140 as described previously under
  • Figure 4 shows a manifold 172 suitable for tapping into refrigerant cans, a convenient source of virgin refrigerant.
  • Piercing and sealing devices 172 are preferable according to U. S. Patent 4,852,769 to Robertson.
  • Other alternative sources of refrigerant are storage means 120 cylinders filled with recovered and purified refrigerant from the present system, larger disposable containers or refillable refrigerant cylinders and connected to source inlet 180.
  • Service port 101 and 104 are preferably schrader valves and can be used to remove all refrigerant from the system prior to replacing any of filter dryers 92, 94, 96 or 30.
  • Port 104 is connected by hose to an external storage cylinder and connect port 101 by hose to service outlet 10. Then compressor 40 can pump all refrigerant into the storage cylinder. Modifications
  • compositions, methods, or embodiments discussed are intended to be only illustrative of the invention disclosed by this specification. Variation on these compositions, methods, or embodiments are readily apparent to a person of skill in the art based upon the teachings of this specification and are therefore intended to be included as part of the inventions disclosed herein

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Compressor (AREA)

Abstract

Système de récupération et d'épuration de réfrigérant pouvant exercer au besoin le vide presque complet sur le système devant être vidangé et comportant un dispositif de clapet à plusieurs ajutatges pour déterminer différentes configurations, pour différents cycles de traitement de réfrigérant; par exemple vidange, vide intense, récupération, cycle d'épuration, chargement en réfrigérant, chargement en huile, etc. Le réfrigérant épuré peut être déversé de récipients en usage dans le commerce ou de réservoirs à réfrigérant par l'intermédiaire d'un collecteur. les principaux composants sont: un dispositif d'admission/évacuation (10), un dispositif accumulateur à succion (20), un dispositif d'épuration basse ( déshydrateur à filtre) (30) , un compresseur (40), un circuit secondaire (70), un dispositif d'épuration (haute) (90), un collecteur d'évacuation par pompage (100), un dispositif de stockage (120), un dispositif d'injection d'huile (140), un dispositif d'apport de régrigérant propre (170) et (180), un dispositif de pompage à vide (200) et un dispositif de régulation de la circulation (240).
PCT/US1992/001485 1991-03-11 1992-02-25 Recuperation et epuration de refrigerant Ceased WO1992016802A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66769591A 1991-03-11 1991-03-11
US667,695 1991-03-11

Publications (2)

Publication Number Publication Date
WO1992016802A2 true WO1992016802A2 (fr) 1992-10-01
WO1992016802A3 WO1992016802A3 (fr) 1992-11-26

Family

ID=24679250

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/001485 Ceased WO1992016802A2 (fr) 1991-03-11 1992-02-25 Recuperation et epuration de refrigerant

Country Status (2)

Country Link
AU (1) AU1645492A (fr)
WO (1) WO1992016802A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568261A1 (fr) * 1992-04-27 1993-11-03 Mueller Refrigeration Products Company Filtre déshydrateur pour réfrigérant pour un dispositif de recyclage de réfrigérant
US6314749B1 (en) 2000-02-03 2001-11-13 Leon R. Van Steenburgh, Jr. Self-clearing vacuum pump with external cooling for evacuating refrigerant storage devices and systems
GB2404969A (en) * 2003-08-13 2005-02-16 Graham James Wright Complete refrigerant recovery

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4285206A (en) * 1979-02-05 1981-08-25 Draf Tool Co., Inc. Automatic refrigerant recovery, purification and recharge apparatus
US4441330A (en) * 1980-12-01 1984-04-10 Robinair Manufacturing Corporation Refrigerant recovery and recharging system
US4768347A (en) * 1987-11-04 1988-09-06 Kent-Moore Corporation Refrigerant recovery and purification system
US4969495A (en) * 1989-06-27 1990-11-13 Grant David C H Direct condensation refrigerant recovery and restoration system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568261A1 (fr) * 1992-04-27 1993-11-03 Mueller Refrigeration Products Company Filtre déshydrateur pour réfrigérant pour un dispositif de recyclage de réfrigérant
US6314749B1 (en) 2000-02-03 2001-11-13 Leon R. Van Steenburgh, Jr. Self-clearing vacuum pump with external cooling for evacuating refrigerant storage devices and systems
GB2404969A (en) * 2003-08-13 2005-02-16 Graham James Wright Complete refrigerant recovery

Also Published As

Publication number Publication date
AU1645492A (en) 1992-10-21
WO1992016802A3 (fr) 1992-11-26

Similar Documents

Publication Publication Date Title
EP0329321B1 (fr) Système de récupération, de purification et de recharge pour réfrigérant
US5361594A (en) Refrigeration recovery and purification
US5875638A (en) Refrigerant recovery system
CA1331922C (fr) Systeme de recuperation et de purification de refrigerant
US4441330A (en) Refrigerant recovery and recharging system
US6029472A (en) Refrigerant recycle and reclaim system
US6244055B1 (en) Refrigerant recovery and recycling system
US5548966A (en) Refrigerant recovery system
US4939905A (en) Recovery system for differing refrigerants
US4364236A (en) Refrigerant recovery and recharging system
US4938031A (en) Refrigerant recovery and purification system
US5203177A (en) Refrigerant handling system with inlet refrigerant liquid/vapor flow control
WO1991000485A1 (fr) Systeme de recuperation et de reconstitution de refrigerant a condensation directe
US5291743A (en) Refrigerant reclaim with automatic air purge
CA2071632A1 (fr) Unite de recuperation, de traitement et de stockage de frigorigene
US20010025496A1 (en) Filling device for motor vehicle air-conditioning systems
US7937957B2 (en) Method for using high pressure refrigerant for leak checking a system
US5247802A (en) Method for recovering refrigerant
US5761924A (en) Refrigerant recycling apparatus and method
US5097667A (en) Apparatus and a method for emptying and recharging a refrigeration system
US5934091A (en) Refrigerant recovery and recycling system
US5086630A (en) Refrigerant reclaim apparatus
US5685161A (en) Refrigerant recovery and recycling apparatus
US5678415A (en) Refrigerant recovery apparatus
WO1992016802A2 (fr) Recuperation et epuration de refrigerant

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AU BB BG BR CA CS DK FI HU JP KP KR LK MG MN MW NO PL RO RU SD

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE BF BJ CF CG CH CI CM DE DK ES FR GA GB GN GR IT LU MC ML MR NL SE SN TD TG

AK Designated states

Kind code of ref document: A3

Designated state(s): AU BB BG BR CA CS DK FI HU JP KP KR LK MG MN MW NO PL RO RU SD

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE BF BJ CF CG CH CI CM DE DK ES FR GA GB GN GR IT LU MC ML MR NL SE SN TD TG

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA