EP0431335A2 - Dispositif pour décharger le réfrigérant de systèmes frigorifiques à absorption - Google Patents

Dispositif pour décharger le réfrigérant de systèmes frigorifiques à absorption Download PDF

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Publication number
EP0431335A2
EP0431335A2 EP90121324A EP90121324A EP0431335A2 EP 0431335 A2 EP0431335 A2 EP 0431335A2 EP 90121324 A EP90121324 A EP 90121324A EP 90121324 A EP90121324 A EP 90121324A EP 0431335 A2 EP0431335 A2 EP 0431335A2
Authority
EP
European Patent Office
Prior art keywords
line
valve
pressure
container
pressure vessel
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.)
Granted
Application number
EP90121324A
Other languages
German (de)
English (en)
Other versions
EP0431335B1 (fr
EP0431335A3 (en
Inventor
Rolf-Dieter Giesler
Volker Müller
Karl-Gösta Almèn
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.)
Electrolux Siegen GmbH
Original Assignee
Electrolux Siegen GmbH
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 Electrolux Siegen GmbH filed Critical Electrolux Siegen GmbH
Publication of EP0431335A2 publication Critical patent/EP0431335A2/fr
Publication of EP0431335A3 publication Critical patent/EP0431335A3/de
Application granted granted Critical
Publication of EP0431335B1 publication Critical patent/EP0431335B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F25B2345/004—Details for charging or discharging refrigerants; Service stations therefor with several tanks to collect or charge a cycle

Definitions

  • the invention relates to a device for environmentally friendly emptying and disposal of absorption refrigeration systems.
  • Refrigeration devices based on absorption therefore accumulate in large quantities in the depots for municipal waste disposal and in specialist disposal companies.
  • the refrigerant in absorber refrigeration devices is under increased pressure, usually up to 25 bar. In contrast to the refrigerant contained in the compressor unit, it does not evaporate when the pressure is released, but remains in liquid form in the now open cooling system.
  • the ammonia contained in the refrigeration system is eagerly absorbed by water; at 20 ° C 100 ml of water dissolve about 52 g of NH3. For this reason, even in the event of leaks, most of the ammonia can remain in the aqueous solution of the refrigeration system.
  • ammonia is formed in many ways even in natural processes and has a relatively low toxicity, health impairments can occur at higher concentrations, which make regulated disposal appear necessary.
  • the sodium chromate also contained in the refrigeration system represents a considerably greater risk. Chromium compounds and especially chromates are known to be highly carcinogenic and can also lead to serious allergies if they come into frequent contact. The sodium chromate contained in the refrigeration system of an absorption device also remains in the refrigeration device if there are any leaks.
  • the invention is therefore based on the object of enabling safe disposal of the refrigerant from absorption devices which have a refrigeration unit which is still intact or has no pressure.
  • the system essentially consists of two pressure vessels arranged on a mobile frame, which are integrated into a special pipeline construction.
  • Each container has a safety valve, which is connected to the exhaust air chimney via a pipe system and a level indicator.
  • the level indicator can also be a sight glass in the container wall.
  • the respective tank pressure is indicated by at least one manometer on one of the tanks.
  • the container II has a water reservoir in the operating state, preferably with about half the filling.
  • a so-called pipe separator is particularly suitable for this.
  • the system has two pressure hose lines with special adapters for connection to the refrigeration units. These adapters should be designed for pipe diameters from 16 mm to 20 mm. Corresponding adapters are described in the applicant's parallel application P 39 39 248.1 with the same filing date.
  • the hose lines are connected to the pressure vessel system.
  • a compressed air connection is provided on container 1 for blowing out the refrigeration units.
  • Fig. 1 shows an embodiment of the system according to the invention with a first pressure vessel 1 and a downstream pressure vessel II, which are connected by a connecting line 29.
  • the connecting line 29 is attached to the upper part of the pressure vessel I and ends in the lower half of the pressure vessel II.
  • the pressure vessel II is approximately half filled with water so that line 29 ends below the water level.
  • Both pressure vessels have pressure gauges 34, 35 and pressure relief valves 36, 37 which are connected to the exhaust air line 31 via lines. This arrangement prevents harmful vapors from entering the installation room and endangering personnel in the event of incorrect operation or malfunction.
  • the exhaust line 31 starts in the upper half of the container II; it can be closed by a valve 10.
  • Both pressure vessels also have drain lines 28, 32 with drain valves 7, 8, which lead to a line to a collecting container for the refrigerant to be disposed of.
  • the container II is also connected via a line 30 and a valve 9 to a fresh water supply.
  • a check valve 13 is preferably located in this line.
  • the container I has connections for a separate compressed air line 27 with a valve 6 and a line 26 for the refrigerant to be disposed with a valve 5.
  • the compressed air line 27 is fed via a compressor 23, which supplies compressed air with preferably approximately 18 bar, and via a throttle valve 11 with compressed air of approximately 7 bar.
  • Compressed air can be supplied via line 27 to the two containers I and II when the valve 6 is open and can be blown out in this way when the valve 10 is closed and the valves 7 and 8 are open.
  • the pressure line 26 for the refrigerant to be disposed is connected on the side of the valve 5 remote from the container via a line 33 to the compressed air line 27, which supplies compressed air at a pressure of approximately 7 bar.
  • the mouth of the compressed air line 33 is designed as an injector 12, which emits its compressed air flow in the direction of the container I and is able to generate a negative pressure of approximately 40 mbar in the line 26 on the side facing away from the container. In this way it is ensured that, when a pressurized refrigerant line is pierced, refrigerant escaping is drawn into the pressure container I and does not get into the environment.
  • the pressure line 26 for the refrigerant to be disposed further has a valve 3 and continues to the second adapter 22, which is connected to the refrigeration system to be disposed of.
  • the adapter 22 can be, for example, a gripper with attached, movably arranged mandrel, which is pressed into the refrigerant line to be pierced via a pressure nut through a rubber seal, as described in the above-mentioned patent application of the same day.
  • a line 25 with a valve 2 branches off from line 26 between injector 12 and valve 3.
  • This line 25 opens into line 24, which connects the first adapter 21 for connection to the refrigeration system with the compressed air line from the compressor 23.
  • the valve 1 is preferably a time-controlled solenoid valve which is set to a time which is sufficient for the complete blowing out of all common absorber systems, for example about ten minutes.
  • the system according to the invention is operated as follows.
  • the container II is filled about half with water. This can be checked, for example, via a sight glass 39. Valves 1 to 8 are closed, valves 9 (fresh water) and 10 (ventilation) are open.
  • the adapter 21 is attached to the refrigeration unit, preferably in the vicinity of the storage container, and the pipe system is opened with the piercing device integrated in the adapter. Valves 1 and 3 and 6 to 9 are closed and 2, 4, 5 and 10 are open so that the pressure of approx. 25 bar can escape into pressure vessel I; as a result, the lines 24, 25 and 26 are released into the pressure vessel I.
  • Compressed air of approximately 7 bar enters the injector 12 via the line 33 and the valve 4 and generates a slight negative pressure in the line 26, which ensures that the hydrogen escaping from the pierced refrigeration unit with its saturation content ammonia enters the container I and arrives in the water reservoir of container II where the major part of the ammonia vapor is absorbed and the hydrogen reaches the atmosphere through the exhaust air line 31 and the opened valve 10.
  • the adapter 22 is attached in the area of the water separator / condenser of the refrigeration unit.
  • valves 1, 3, 5 and 10 are opened and valves 2, 4 and 6 to 9 are closed.
  • a compressed air flow of approximately 17 l / s and 18 bar is applied to the refrigeration unit.
  • a time-controlled solenoid valve 1 a defined period of ten minutes is usually sufficient to empty the cooling unit.
  • the refrigerant is flushed through the line 26 and the opened valves 3 and 5 into the pressure vessel I, while the air stream containing ammonia is passed through the water reservoir in the vessel II, where the majority of the ammonia content is removed is sorbed and the cleaned air reaches the atmosphere via line 31 and valve 10.
  • Most of the chromate contained in the refrigerant remains with the refrigerant in pressure vessel I; A small proportion is carried along with the compressed air into tank II, where it is separated in the water reservoir.
  • the exhaust air flowing out via line 31 therefore only has chromate particles in a concentration below the permissible values.
  • the containers I and II are filled or saturated with ammonia vapor so that further disposal is no longer possible.
  • valves 1 to 5 and 9 and 10 are closed and 6 and one of 7 and 8 are opened so that compressed air can be supplied to container I via line 27 and valve 6.
  • the valve 7 is open, the container I is emptied via the valve 7 and the line 28 into a collecting container for such waste.
  • the pressure vessel II is emptied into the collecting vessel via the line 32.
  • the adapters 21, 22 and the compressor 23 are connected to the system according to the invention via hose quick couplings.
  • the collecting container for the collected refrigerant can also be connected via a quick coupling, in which case a transparent hose line makes it easier to follow the decanting process.
  • Fig. 2 shows a pressure vessel system according to the invention in front view.
  • the two pressure vessels I and II are connected to one another in the manner described above by the connecting line 29.
  • the container II has a manometer 35 and a valve 10 with the exhaust air line 31 at its upper end.
  • the pressure lines of the pressure relief valves 36, 37 open into the exhaust air line 31 (covered).
  • the container II also has a fresh water supply 30 with a shut-off valve 9 and a check valve 13.
  • Both containers I, II are provided with sight glasses 39 which allow the liquid level to be checked.
  • the compressed air is supplied via line 24. This leads via line 27, throttle valve 11, line 33, valve 4 and injector 12 into line 26, which leads into container I after passing valve 5.
  • the line 24 leads via the valve 1 to a quick hose connection 41, via which it then continues as a pressure hose 24 to the first adapter 21.
  • Line 25 connects line 24 via valve 2 to line 26 and container I.
  • the second adapter 22 is connected to the line 26 with the valve 3 by means of a hose via a hose quick connector 42.
  • compressed air can be applied to the refrigeration unit to be drained via the pressure line 24 with the valve 1 and valve 2 closed, via the hose quick connector 41, a pressure hose 24 connected to it and the adapter 21, so that the refrigerant via the adapter 22 Hose quick connector 42, the valve 3, the line 26 and the opened valve 5 is pressed into the container I. Valves 2 and 4 are closed.
  • the compressed air line 27 opens via the valve 6 into the container I, which can thus be emptied via the line 28 when the valve 7 is open and the valve 10 is closed.
  • the lines 26 and 27 preferably open tangentially into the container in order to avoid splashing.
  • FIG. 3 shows a top view of the device according to the invention according to FIG. 2.
  • the pressure vessels I and II which are closed in a conventional manner on the top, each have a pressure gauge 34, 35 and pressure relief valves 36, 37, which are connected via a line the exhaust line 31 are connected.
  • the exhaust air line 31 has a valve 10.
  • the two containers I and II are connected to one another via the connecting line 29.
  • Sight glasses 39 enable the liquid level to be checked.
  • FIG. 4 shows a section through the system according to the invention according to FIG. 2 along the line A - A.
  • the containers I and II are connected via the connecting line 29 (partially shown).
  • the line 26 leads via the injector 12 and the valve 5 tangentially into the container I; likewise the compressed air line 27 leads tangentially into this container via the valve 6.
  • the compressed air line 27 leads tangentially into this container via the valve 6.
  • compressed air, refrigerant and drain lines with the corresponding valves.
  • the container II is supplied with fresh water via the line 30 and the valve 9, a check valve 13 preventing water from flowing back into the line from the possibly pressurized container.
  • a pipe separator can also be provided, which consists of a solenoid valve and a component that combines the functions of a backstop and an overflow.
  • the solenoid valve shuts off the fresh water supply during operation, the backstop prevents dirty water from flowing back into the fresh water line, and with the help of an overflow designed in the manner of a siphon, the water between the solenoid valve and the backstop can be drained off, so that fresh water and Dirty water is safely avoided.
  • Both containers I and II are equipped with sight glasses 39 for checking the liquid level.
  • the container II also has a ring line 38 in its interior, into which the line 29 opens.
  • This ring line has numerous perforations pointing downwards or obliquely downwards, which allow the gas flowing in via line 29 to exit below the water surface in container II. This enables the absorption of ammonia and the washing out of chromate.
  • FIG. 5 is a side view of a pressure vessel I used according to the invention according to FIG. 2 with a pressure gauge 34, a pressure relief valve 36, the discharge line 28 together with valve 7. In the background the exhaust line 31 is indicated, in the foreground parts of the connected line system.
  • the system according to the invention is particularly suitable for mobile use. To do this, it can be mounted on a trolley or on a truck.

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)
  • Fire-Extinguishing Compositions (AREA)
  • Sorption Type Refrigeration Machines (AREA)
EP90121324A 1989-11-28 1990-11-07 Dispositif pour décharger le réfrigérant de systèmes frigorifiques à absorption Expired - Lifetime EP0431335B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3939296 1989-11-28
DE3939296A DE3939296C3 (de) 1989-11-28 1989-11-28 Vorrichtung zum Entsorgen des Kältemittels von Absorptions-Kältesystemen

Publications (3)

Publication Number Publication Date
EP0431335A2 true EP0431335A2 (fr) 1991-06-12
EP0431335A3 EP0431335A3 (en) 1991-06-19
EP0431335B1 EP0431335B1 (fr) 1992-08-26

Family

ID=6394342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90121324A Expired - Lifetime EP0431335B1 (fr) 1989-11-28 1990-11-07 Dispositif pour décharger le réfrigérant de systèmes frigorifiques à absorption

Country Status (7)

Country Link
US (1) US5090215A (fr)
EP (1) EP0431335B1 (fr)
JP (1) JP2863308B2 (fr)
BR (1) BR9005999A (fr)
DE (2) DE3939296C3 (fr)
ES (1) ES2034808T3 (fr)
FI (1) FI91561C (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4209439C2 (de) * 1992-03-24 1994-06-09 Kuehl System Recycling Verfahren und Vorrichtung zur Entleerung und Entsorgung von flüssigen und gasförmigen Medien aus einem Behälter und damit verbundenen Rohrleitungen
US5442930A (en) * 1993-10-22 1995-08-22 Stieferman; Dale M. One step refrigerant recover/recycle and reclaim unit
ES2208039B1 (es) * 2001-12-21 2005-09-16 Gestioines Estudios Y Realizaciones S.A. Dispositivo de vaciado automatico para bandeja de acondicionamiento evaporativo, torres de refrigeracion y otros.
JP3885817B2 (ja) * 2005-04-19 2007-02-28 ダイキン工業株式会社 分岐冷媒中継ユニットおよびその製造方法
KR101371323B1 (ko) * 2012-04-12 2014-03-10 박창기 냉매 회수 장치
US9683515B2 (en) * 2013-07-02 2017-06-20 Cummins, Inc. Waste heat recovery system including a mechanism for collection, detection and removal of non-condensable gas
USD1002676S1 (en) 2019-08-30 2023-10-24 Dometic Sweden Ab Appliance
USD1053913S1 (en) 2020-08-31 2024-12-10 Dometic Sweden Ab Refrigerator
CN112856864B (zh) * 2021-01-16 2023-07-21 北海职业学院 一种制冷剂净化系统

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1513172A (en) * 1923-01-06 1924-10-28 Hill Bert Eugene Apparatus and process for removing noncondensible gases
GB395535A (en) * 1931-09-22 1933-07-20 Westinghouse Electric & Mfg Co Improvements in or relating to a method of drying refrigerator units
US2327081A (en) * 1941-11-06 1943-08-17 Roscoe E Walters Air purger
US2510737A (en) * 1946-09-18 1950-06-06 Servel Inc Refrigeration apparatus, including means for limited removal of noncondensable gases
US2972235A (en) * 1958-12-05 1961-02-21 Exxon Research Engineering Co Purification of refrigerant
FR1395017A (fr) * 1964-02-28 1965-04-09 Inv Rech Applic Et De Realisat Dispositif de charge automatique de fluides sous pression
US3503221A (en) * 1968-06-17 1970-03-31 Frank C Martin Dehydration,cleaning and sterilization method and apparatus
US3699781A (en) * 1971-08-27 1972-10-24 Pennwalt Corp Refrigerant recovery system
DE2202540A1 (de) * 1972-01-20 1973-07-26 Vorwerk & Co Elektrowerke Kg Kocher fuer absorptionskuehlaggregate
US3896633A (en) * 1974-10-15 1975-07-29 Cleo J Moore Combination air drying and cleaning apparatus
FR2411802A1 (fr) * 1977-12-15 1979-07-13 Raffinage Cie Francaise Procede d'elimination de l'hydrogene sulfure contenu dans un melange gazeux
CH625609A5 (fr) * 1977-12-23 1981-09-30 Sulzer Ag
US4476688A (en) * 1983-02-18 1984-10-16 Goddard Lawrence A Refrigerant recovery and purification system
DE3616591A1 (de) * 1986-05-16 1987-11-19 Weiss Umwelttechnik Gmbh Verfahren und vorrichtung zur ueberfuehrung von kaeltemittel aus einem kaeltekreislauf in einen kaeltemittelspeicher
US4768347A (en) * 1987-11-04 1988-09-06 Kent-Moore Corporation Refrigerant recovery and purification system
EP0421999A4 (en) * 1988-01-11 1992-01-15 Thomas Duran Merritt Refrigerant recovery system
DE3829923C2 (de) * 1988-02-26 1996-01-25 Kuehl System Recycling Vorrichtung zur Entsorgung und Wiederaufbereitung umweltgefährdender Stoffe aus Kälteanlagen
US4776174A (en) * 1988-02-12 1988-10-11 Carrier Corporation Refrigerant recovery device
DE8900164U1 (de) * 1989-01-09 1989-09-07 Walter GmbH, 6642 Mettlach Vorrichtung zur Entsorgung von Kühlaggregaten
US4984431A (en) * 1990-06-20 1991-01-15 Carrier Corporation High efficiency purge system

Also Published As

Publication number Publication date
DE3939296A1 (de) 1991-06-06
EP0431335B1 (fr) 1992-08-26
BR9005999A (pt) 1991-09-24
FI91561B (fi) 1994-03-31
FI905856A7 (fi) 1991-05-29
DE59000276D1 (de) 1992-10-01
US5090215A (en) 1992-02-25
DE3939296C2 (fr) 1992-03-05
DE3939296C3 (de) 1996-02-08
ES2034808T3 (es) 1993-04-01
FI91561C (fi) 1994-07-11
JP2863308B2 (ja) 1999-03-03
FI905856A0 (fi) 1990-11-28
EP0431335A3 (en) 1991-06-19
JPH03211379A (ja) 1991-09-17

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