EP0383795B1 - Procede et appareil de regeneration de refrigerant - Google Patents

Procede et appareil de regeneration de refrigerant Download PDF

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Publication number
EP0383795B1
EP0383795B1 EP88909071A EP88909071A EP0383795B1 EP 0383795 B1 EP0383795 B1 EP 0383795B1 EP 88909071 A EP88909071 A EP 88909071A EP 88909071 A EP88909071 A EP 88909071A EP 0383795 B1 EP0383795 B1 EP 0383795B1
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EP
European Patent Office
Prior art keywords
refrigerant
compressor
storage means
gaseous
conduit
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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.)
Expired - Lifetime
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EP88909071A
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German (de)
English (en)
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EP0383795A4 (en
EP0383795A1 (fr
Inventor
Leon R Van Steenburgh Jr.
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Individual
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Individual
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Priority to AT88909071T priority Critical patent/ATE89914T1/de
Publication of EP0383795A1 publication Critical patent/EP0383795A1/fr
Publication of EP0383795A4 publication Critical patent/EP0383795A4/en
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Publication of EP0383795B1 publication Critical patent/EP0383795B1/fr
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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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the 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
    • 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

Definitions

  • This invention relates to a refrigeration recovery and purification system and to a method for reclaiming refrigerants.
  • US-A-4 364 236 discloses a refrigerant recovery and purification system comprising: a refrigerant compressor having an input and an output; means including an evaporator for connecting a refrigeration system from which refrigerant is to be recovered to said input of said compressor; means including condenser means coupled to said output of said compressor for bringing compressed refrigerant in heat exchange relation with refrigerant in said evaporator; refrigerant storage means having an inlet port and an outlet port; means for conveying liquid refrigerant from said condenser to said inlet port; and filter means for removing contaminants from refrigerant passing therethrough.
  • the present invention is characterized in that the system further comprises means for selectively circulating refrigerant in a closed path from said outlet port through said filter means to said inlet port of said refrigerant storage means; said means comprising expansion means for expanding liquid from said refrigerant storage means, and heat exchange means within said refrigerant storage means for indirect heat exchange between said expanded refrigerant and liquid refrigerant, and said compressor.
  • the present invention also provides a method for reclaiming refrigerant comprising: withdrawing refrigerant to be reclaimed from a refrigeration container; evaporating the refrigerant; compressing the gaseous refrigerant; cooling the gaseous refrigerant by indirect heat exchange with said refrigerant to evaporate said refrigerant; condensing the compressed gaseous refrigerant; discharging the liquid refrigerant thus formed into refrigerant storage means; withdrawing liquid from said refrigerant storage means; and passing said refrigerant through a filter; characterized in that said method further comprises the step of expanding liquid from said refrigerant storage means, and bringing said expanded fluid into heat exchange with said liquid refrigerant within said refrigerant storage means, and recompressing expanded fluid from said refrigerant storage means.
  • the reclaim system of this invention includes a heat exchanger 10, one portion of which is in fluid communication with a refrigerant intake fluid conduit 11 controlled by solenoid valve 12.
  • the conduit 11 is in fluid communication with conduit 13 which constitutes the cold side of heat exchanger 10.
  • the conduit 13 is illustrated as being joined to conduit 15 by thermally conductive weld 14.
  • Conduit 15 constitutes the hot side of heat exchanger 10.
  • the heat exchanger arrangement shown in the drawing is for illustration purposes only. In practice it is preferred that intake 11 be in fluid communication with a conduit with a spiral fin, or ridge and groove arrangement, facilitating its being mounted within a conduit to form a so-called tube-within-a-tube heat exchanger.
  • the tube-within-a-tube construction is in the form of a coil so as to provide greater length in a smaller space than would be possible with a straight tube-within-a-tube construction.
  • the coiled tube-within-a-tube is a standard item well known in the heat exchange art, and it will be apparent that the inner tube should be the cold side and the outer tube the hot side of the heat exchanger.
  • Conduit 16 constitutes the outlet from the cold side of heat exchanger 10 and is in fluid communication with oil separator 20 through the conduit 21.
  • the oil separator 20 is preferably an elongated pressure cylinder with partially spherical ends mounted so that its longitudinal axis extends vertically.
  • the fluid conduit 21 extends through the outer wall of the oil separator tank 20 somewhat above the lower end of the tank and extends inwardly so that its open end is near the axis of the tank.
  • Another fluid conduit 22 has its open end fixed near the inner surface of the rounded top of the tank. This fluid conduit extends downwardly and supports a circular baffle 23 composed of a disc-like portion 24 and a downwardly extending partially cone-shaped skirt 25.
  • Conduit 22 is arranged to extend along the axis of the tank and is connected to fluid conduits 26 and 31 controlled by a low pressure activated electrical control device 27 having a pressure gauge indicator associated with it.
  • the control 27 will automatically shut down compressor 30 when the pressure in conduit 31 drops to virtually zero.
  • Oil from the bottom of oil separator 20 can be discharged through fluid conduit 28 controlled by solenoid valve 29.
  • Fluid conduit 31 extends through the outer wall of compressor 30 and a short distance into its interior as illustrated.
  • Compressor 30 is provided with a fluid conduit outlet 32 and an oil sight gauge and oil supply device 33.
  • Outlet conduit 32 has a high pressure activated electrical control device 34 associated with it and is in fluid communication with conduit 15 of heat exchanger 10 and is thus in fluid communication with conduit 41, which in turn is in fluid communication with a condenser 40 through condenser inlet conduit 42. If pressure in conduit 32 is too high, control 34 acts automatically to shut down compressor 30.
  • Outlet conduit 43 connects condenser 40 in fluid communication with chill tank 50, which as illustrated is an elongated, cylindrical pressure tank arranged with its longitudinal axis extending vertically and having upper and lower ends of partially spherical shape. Outlet end 51 of fluid conduit 43 is located substantially on the axis of chill tank 50.
  • a fluid conduit 52 controlled by solenoid valve 53 and arranged in fluid communication with the interior of chill tank 50.
  • an air outlet conduit 54 controlled by solenoid valve 55 having a pressure gauge indicator associated with it.
  • Conduit 54 is vented to the atmosphere through a small orifice to prevent an explosive discharge of air.
  • Fluid conduits 52 and 54 open into the interior of chill tank 50 at points preferably on the longitudinal axis of the tank.
  • a high pressure activated safety valve 56 located at the upper end of chill tank 50.
  • a cooling and recycling system 60 Located partially within and partially outside chill tank 50 is a cooling and recycling system 60 composed of a conduit 61 in fluid communication with conduit 52 and controlled by solenoid valve 62.
  • the fluid conduit 61 is in fluid communication with filter-dryer 63, which in turn is connected in fluid communication with an expansion device 64, illustrated in the drawing as being a capillary tube.
  • the expansion device 64 is in fluid communication with conduit 65 arranged in the form of a coil within chill tank 50.
  • the cooling coil 65 is in fluid communication with conduit 66, which in turn is in fluid communication with inlet conduit 31 of compressor 30.
  • All the elements of the reclaim system of this invention can be mounted within a mobile cabinet (not shown) having a control panel in one outer surface and casters underneath it.
  • the control panel includes a power on-off switch which, depending on the positions of various valves and the pressures at various points in the system, energizes the compressor 30 and the valves 12, 29, 55, 53 and 62. Since controls 27 and 34 shut down or start up compressor 30 automatically when power is on, and since relief valve 56 responds automatically to pressure, the control panel need not include switches for manually activating these devices. Hence the control panel need include only, in addition to the power on-off switch, switches for valve 12 (refrigerant in), valve 29 (oil out), valve 53 (refrigerant out), valve 55 (air out) and valve 62 (control for cooling and recycling system 60), or a total of six switches.
  • the control panel also includes two pressure gauge indicators, one for displaying the pressure entering conduit 31 and the other for displaying the pressure at valve 55 and the upper portion of chill tank 50. Details of the circuitry for electrically connecting switches, controls, valves and gauges will be apparent to those skilled in this art.
  • Chill tank 50 being the largest element of the reclaim system, and being about 122 cm (48 inches) in height, the cabinet should be about 157 cm (62 inches) in height including the height of the casters.
  • the cabinet can be about 71 cm (28 inches) in width and 61 cm (24 inches) in depth if the cabinet contains the system illustrated in the drawing which has only one chill tank 50.
  • one or more additional chill tanks can be provided and connected to run in parallel with the first chill tank 50.
  • Each chill tank is preferably about 15 cm (6 inches) in diameter, has a capacity to store or hold 20.5 kg (45 lbs) of refrigerant such as "Freon" 12, 22 or 502 and meets ASME and Underwriters Laboratory specifications for pressure tanks.
  • the tank for oil separator 20 preferably meets the same specifications and is 91 cm (36 inches) long and 15 cm (6 inches) in diameter.
  • Compressor 30 is of a type in which a combination sight gauge and oil inlet cap 33 can be provided for maintaining proper lubrication in compressor 30.
  • fluid conduit 11 When the system illustrated is utilized in repair of the refrigerating system of an air conditioner, for example, fluid conduit 11 is connected to a refrigerant outlet in the refrigeration system, the power is turned on and valve 12 is opened. Control 27 at the inlet to the compressor is activated when it senses pressure in fluid conduit 31, and with the power turned on compressor 30 begins to function. Refrigerant from the refrigeration system is drawn into the reclaim system through conduit 11. Normally the refrigerant at this point will be a liquid, which has been illustrated in the drawings by double cross hatching inside the fluid conduit. At some point in fluid conduit 13 of heat exchanger 10 the refrigerant is converted to gaseous form by the heat transferred to it from conduit 15 carrying the output of compressor 30. The single cross hatching in fluid conduit.
  • FIG. 13 is illustrative of refrigerant in gaseous form.
  • double cross-hatching indicates liquid and single cross-hatching gas or vapour.
  • the refrigerant flows through fluid conduits 16 and 21 into oil separator 20. It is at this point relatively hot and is an expanding gas rising rapidly within the tank of oil separator 20. The upward flow of gas is abruptly interrupted by the baffle 23 causing oil to be separated and to drop to the bottom of the tank.
  • the gaseous refrigerant passes around the outer (lower) edge of skirt 25 which is spaced from the interior wall Of the surrounding tank by an amount providing a total open area which is approximately equal to the open area at the upper end of conduit 22.
  • the gaseous refrigerant passes around skirt 25 into the upper end of fluid conduit 22, then through fluid conduit 26 into fluid conduit 31.
  • compressor 30 will continue to run. Refrigerant from fluid conduit 31 passes into the compressor, is compressed and discharged through fluid conduit 32 and passes through the heat exchanger in fluid conduit 15 and then through fluid conduit 41 into condenser 40 through condenser inlet 42. The gaseous refrigerant entering the condenser is converted into a fluid at some point in the condenser such as 44.
  • Liquid refrigerant passes out of the condenser 40 into conduit 43 and through that conduit into the upper portion of chill tank 50.
  • valves 53 and 62 are closed and the compressor will continue to withdraw refrigerant from the refrigeration system of the air conditioner, and to cause liquid refrigerant to be discharged into chill tank 50 until the pressure at the inlet to compressor 30 drops to virtually zero gauge indicating all of the refrigerant has been removed from the refrigeration system of the air conditioner.
  • control 27 will act to shut down compressor 30.
  • valve 12 refrigerant intake
  • open valve 62 causing liquid refrigerant to leave the chill tank 50 through fluid conduit 52 and pass into the filter dryer 63 through fluid conduit 61.
  • the liquid refrigerant then passes through expansion device 64, where it is converted into a gas and passes through coil 65 to cool the liquid refrigerant, illustrated in the drawing as filling approximately 3/4 of chill tank 50 and having the coil 65 submerged in it.
  • expansion device 64 When expanding gas from coil 65 reaches the compressor inlet conduit 31 via fluid conduit 66, there will be sufficient pressure to actuate control 27, and the compressor will automatically start running again.
  • valve 12 With valve 12 closed, the cold side of heat exchanger 10 and the entirety of oil separator 20 are shut down. With pressure in fluid conduit 31, the compressor continues to operate and the gaseous refrigerant which entered the compressor through conduits 66 and 31 is compressed and discharged from the compressor through fluid conduit 32 and thence through the heat exchanger 10 and condenser 40 back into the chill tank 50 and the cycle just described is repeated again and again until the temperature of the liquid refrigerant in chill tank 50 has been reduced to the desired level, normally about 3.3 to 7.2°C (38 to 45°F).
  • any oil which has been collected in the bottom of oil separator 20, as schematically illustrated in the drawing, should be removed through outlet 28 by opening valve 29.
  • the amount of oil removed should be measured so that an appropriate amount of oil can be resupplied to the refrigeration system.
  • the refrigerant reclaim system described with reference to the drawing can be utilized to transfer refrigerant from one container to another. This is done by connecting the fluid conduit 11 to the container from which refrigerant is to be taken (the first container) and fluid conduit 52 to the receiving or second container. Upon opening valve 12 and supplying power to compressor 30, refrigerant will be removed from the container and passed through the heat exchanger 10, the oil remover 20, the compressor 30, the condenser 40, and into chill tank 50. Operation is continued in this mode until the pressure display on the control panel indicates the first container has been evacuated.
  • valve 12 is then closed. Since it will facilitate discharging the refrigerant into the receiving container, it is desirable that valve 53 first be closed and valve 62 opened so that cooling device 60 will be operative. Operation in this mode is continued for a sufficient period to reduce the liquid refrigerant in chill tank 50 to the desired temperature. When the desired temperature is reached, valve 62 is closed, valve 53 opened, and liquid refrigerant will flow from the chill tank 50 into the receiving container by gravity, and any pressure from gases in the upper portion of chill tank 50.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Drying Of Gases (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Claims (12)

  1. Système de récupération et de purification de réfrigérant comprenant :
       un compresseur de réfrigérant (30) ayant une entrée et une sortie ;
       un moyen comportant un évaporateur (10) pour connexion à un système de réfrigération à partir duquel le réfrigérant doit être récupéré à ladite entrée dudit compresseur (30) ;
       un moyen comportant un moyen de condenseur (40) raccordé à ladite sortie dudit compresseur (30) pour amener le réfrigérant compressé en relation d'échange de chaleur avec le réfrigérant dans ledit évaporateur (10) ;
       un moyen de stockage de réfrigérant (50) ayant un orifice d'entrée et un orifice de sortie ;
       un moyen (43) pour transporter le réfrigérant liquide dudit condenseur (40) audit orifice d'entrée ; et
       un moyen de filtre (63) pour enlever les contaminants ou impuretés du réfrigérant passant par celui-ci ;
       caractérisé en ce que ledit système comprend de plus un moyen pour faire circuler sélectivement le réfrigérant dans un trajet fermé à partir dudit orifice de sortie par l'intermédiaire dudit moyen de filtre (63) vers ledit orifice d'entrée du moyen de stockage de réfrigérant (50), ledit moyen comprenant un moyen de dilatation (64) pour dilater le liquide provenant du moyen de stockage de réfrigérant (50), un moyen d'échange de chaleur (65) à l'intérieur dudit moyen de stockage de réfrigérant (50) pour échange de chaleur indirect entre ledit réfrigérant dilaté et le réfrigérant liquide, et ledit compresseur (30).
  2. Système selon la revendication 1, caractérisé en ce qu'il comporte des moyens (61, 63, 65, 66, 31) pour raccorder ledit second orifice dudit moyen de stockage de réfrigérant (50) à ladite entrée dudit compresseur (30).
  3. Système selon la revendication 1 ou 2, caractérisé en ce que ledit moyen de filtre (63) comprend un moyen pour enlever la vapeur d'eau du réfrigérant passant par celui-ci.
  4. Système selon la revendication 1, 2 ou 3, caractérisé en ce que ledit évaporateur (10) comprend un tube intérieur à l'intérieur d'un tube extérieur, un moyen en serpentin positionnant le tube intérieur à l'intérieur du tube extérieur et définissant un canal en serpentin entre la surface extérieure du tube intérieur et la surface intérieure du tube extérieur, un moyen (11) pour raccorder une extrémité du tube intérieur au système de réfrigérant à partir duquel le réfrigérant doit être récupéré, un moyen raccordant l'extrémité opposée du tube extérieur à une source de réfrigérant gazeux relativement chaud, et un moyen pour amener le réfrigérant provenant du système à partir duquel le réfrigérant doit être récupéré à circuler dans le tube intérieur dans un sens et pour amener le réfrigérant gazeux relativement chaud à circuler dans le sens opposé par l'intermédiaire du canal en serpentin entre les tubes.
  5. Système selon la revendication 4, caractérisé en ce que l'entrée vers le tube extérieur de l'évaporateur (10) est raccordée au côté sortie dudit compresseur (30).
  6. Système selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte un séparateur (20) pour séparer l'huile entraînée dans le réfrigérant gazeux quittant ledit évaporateur (10) en route vers l'entrée dudit compresseur (30), ledit séparateur (20) comprend un réservoir séparateur allongé dans le sens vertical, un moyen de chicane (24, 25) dans la partie supérieure du réservoir séparateur (20) pour arrêter l'écoulement du réfrigérant gazeux chaud se dilatant, la périphérie du moyen de chicane (24, 25) procurant une ouverture étroite entre le moyen de chicane (24, 25) et la paroi intérieure du réservoir séparateur (20) pour permettre l'échappement du réfrigérant gazeux autour du moyen de chicane (24, 25) et un conduit de fluide (22) ayant une entrée au-dessus du moyen de chicane (24, 25) pour enlever le réfrigérant gazeux du réservoir séparateur (20).
  7. Système selon la revendication 6, caractérisé en ce que la zone de l'ouverture étroite et la zone de l'entrée au-dessus du moyen de chicane (24, 25) sont approximativement égales.
  8. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit moyen d'échange de chaleur (65) comprend un conduit de fluide (65) à l'intérieur dudit moyen de stockage de réfrigérant (50), ledit conduit de fluide (65) se prolongeant vers le haut à partir de la partie inférieure dudit moyen de stockage de réfrigérant (50), et un moyen pour raccorder ledit conduit de fluide (65) à l'entrée dudit compresseur (30).
  9. Système selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une ouverture (54) à l'extrémité supérieure dudit moyen de stockage de réfrigérant (50), et un moyen (55) pour évacuer l'air par l'intermédiaire de ladite ouverture (54).
  10. Procédé pour régénérer du réfrigérant comprenant les étapes consistant à :
       extraire le réfrigérant qui doit être régénéré à partir d'un conteneur de réfrigérant ;
       faire évaporer le réfrigérant ;
       compresser le réfrigérant gazeux ;
       refroidir le réfrigérant gazeux par échange de chaleur indirect avec ledit réfrigérant pour faire évaporer ledit réfrigérant ;
       condenser le réfrigérant gazeux compressé ;
       décharger le réfrigérant liquide ainsi formé dans le moyen de stockage de réfrigérant (50),
       extraire le liquide à partir dudit moyen de stockage de réfrigérant (50), et
       passer ledit réfrigérant par un filtre ;
       caractérisé en ce que ledit procédé comprend de plus l'étape consistant à dilater le liquide à partir du moyen de stockage de réfrigérant, amener ledit fluide dilaté en échange de chaleur avec ledit réfrigérant liquide à l'intérieur dudit moyen de stockage de réfrigérant (50), et recompresser le fluide dilaté à partir dudit moyen de stockage de réfrigérant (50).
  11. Procédé selon la revendication 10, caractérisé en ce qu'il comporte l'étape consistant à séparer l'huile du réfrigérant évaporé en arrêtant soudainement l'écoulement de la vapeur et séparant de ce fait l'huile de celle-ci par gravité.
  12. Procédé selon la revendication 11, caractérisé en ce qu'il comprend l'étape consistant à faire passer le réfrigérant gazeux par l'intermédiaire d'une ouverture étroite de type disque après interruption de la vapeur et de faire passer ensuite le gaz par l'intermédiaire d'une ouverture ayant une zone approximativement égale à la zone de l'ouverture de type disque.
EP88909071A 1987-10-19 1988-10-10 Procede et appareil de regeneration de refrigerant Expired - Lifetime EP0383795B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88909071T ATE89914T1 (de) 1987-10-19 1988-10-10 Kuehlmittelregenerierungsverfahren und vorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10995887A 1987-10-19 1987-10-19
US109958 1987-10-19

Publications (3)

Publication Number Publication Date
EP0383795A1 EP0383795A1 (fr) 1990-08-29
EP0383795A4 EP0383795A4 (en) 1990-12-27
EP0383795B1 true EP0383795B1 (fr) 1993-05-26

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Application Number Title Priority Date Filing Date
EP88909071A Expired - Lifetime EP0383795B1 (fr) 1987-10-19 1988-10-10 Procede et appareil de regeneration de refrigerant

Country Status (8)

Country Link
EP (1) EP0383795B1 (fr)
JP (1) JPH0633920B2 (fr)
KR (1) KR940003734B1 (fr)
AT (1) ATE89914T1 (fr)
AU (1) AU628302B2 (fr)
CA (1) CA1328355C (fr)
DE (1) DE3881399T2 (fr)
WO (1) WO1989003963A1 (fr)

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US5022230A (en) * 1990-05-31 1991-06-11 Todack James J Method and apparatus for reclaiming a refrigerant
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US5214927A (en) * 1990-10-05 1993-06-01 Squires David C Method and apparatus for passive refrigerant and storage
US5072594A (en) * 1990-10-05 1991-12-17 Squire David C Method and apparatus for passive refrigerant retrieval and storage
FR2758998B1 (fr) * 1997-02-05 1999-04-02 Dehon Sa Anciens Etablissement Procede de regeneration d'un fluide pollue et installation pour la mise en oeuvre du procede
US7172651B2 (en) * 2003-06-17 2007-02-06 J.M. Huber Corporation Pigment for use in inkjet recording medium coatings and methods
DK176740B1 (da) 2004-12-14 2009-05-25 Agramkow Fluid Systems As Fremgangsmåde og anlæg til kölemiddelpåfyldning på et köleanlæg
KR101673676B1 (ko) 2014-10-10 2016-11-07 현대자동차주식회사 폐냉매로부터 고비등 잔류물을 제거하는 장치 및 방법
CN106524609A (zh) * 2016-11-29 2017-03-22 珠海格力电器股份有限公司 制冷剂净化装置

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US4476688A (en) * 1983-02-18 1984-10-16 Goddard Lawrence A Refrigerant recovery and purification system
US4646527A (en) * 1985-10-22 1987-03-03 Taylor Shelton E Refrigerant recovery and purification system
US4766733A (en) * 1987-10-19 1988-08-30 Scuderi Carmelo J Refrigerant reclamation and charging unit
US4768347A (en) * 1987-11-04 1988-09-06 Kent-Moore Corporation Refrigerant recovery and purification system

Also Published As

Publication number Publication date
JPH03502236A (ja) 1991-05-23
EP0383795A4 (en) 1990-12-27
ATE89914T1 (de) 1993-06-15
AU628302B2 (en) 1992-09-17
EP0383795A1 (fr) 1990-08-29
DE3881399T2 (de) 1993-09-02
WO1989003963A1 (fr) 1989-05-05
DE3881399D1 (de) 1993-07-01
CA1328355C (fr) 1994-04-12
JPH0633920B2 (ja) 1994-05-02
KR940003734B1 (ko) 1994-04-28
AU2548288A (en) 1989-05-23
KR890701965A (ko) 1989-12-22

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