EP0126673A1 - Refrigeration plant with centralized cold production - Google Patents
Refrigeration plant with centralized cold production Download PDFInfo
- Publication number
- EP0126673A1 EP0126673A1 EP84400903A EP84400903A EP0126673A1 EP 0126673 A1 EP0126673 A1 EP 0126673A1 EP 84400903 A EP84400903 A EP 84400903A EP 84400903 A EP84400903 A EP 84400903A EP 0126673 A1 EP0126673 A1 EP 0126673A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- refrigerant
- compressors
- cold production
- evaporators
- production system
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 238000005057 refrigeration Methods 0.000 title claims description 12
- 239000003507 refrigerant Substances 0.000 claims abstract description 30
- 238000009413 insulation Methods 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims description 18
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Images
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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- 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
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
-
- 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
- F25B2400/22—Refrigeration systems for supermarkets
-
- 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
Definitions
- the present invention relates to a refrigeration installation with a centralized cold production system.
- a centralized cold production system comprises, in a known manner, a certain number of motor compressors constituting one or more compression stages which pass the gaseous refrigerant from its low pressure state at their inlet, to the state of high pressure fluid at their outlet, and a condenser which lets this high pressure fluid transform into liquid before being distributed in the evaporators of the showcases of the installation.
- the liquid refrigerant by expanding in these evaporators provides cold to these showcases, and returns in gaseous form to the inlet of the compressors of the centralized cold production system.
- the gaseous refrigerant having supplied cold and leaving the evaporators still remains at a temperature below ambient temperature until it arrives at these motor-compressors.
- the pipe which connects the evaporators of these showcases to the motor compressors of the centralized cold production system and which ensures the circulation of this cold gaseous fluid, is usually insulated to avoid annoying condensation of moisture along its length and a disturbance of the air conditioning from where this pipeline crosses.
- This pipe also has a relatively large diameter in order to give this gaseous refrigerant a sufficient flow to supply these motorcycles. compressors without disturbing the normal operation of the refrigeration circuit of the installation.
- the present invention aiming to bring an improvement to a refrigeration installation with a centralized cold production system, mainly allowing to eliminate the usual insulation of the refrigerant pipe connecting the evaporators to the input of the motor compressors of this cold production system and to reduce appreciably the diameter of this pipe without compromising the normal operation of the installation, has for its object an efficient and economic refrigeration installation with centralized cold production system.
- a refrigeration installation with centralized cold production system in which there is a pipe for refrigerant, which provides a connection between sets of evaporators of the points of use and the compressors of this centralized cold production system and at least one compressor mounted upstream of this connecting pipe at the outlet of these evaporator assemblies, characterized in that, in order to obtain a reduction in the diameter of the connecting pipe and an absence of insulation of the latter, it comprises compressors providing precompression of the gaseous expanded refrigerant leaving the evaporator assemblies in order to make it denser and raising its temperature to a level equivalent to that of the temperature of the ambient medium.
- an embodiment is illustrated below, illustrated by an appended drawing which represents a schematic view of a refrigeration installation with a centralized cold production system comprising several points of use such as display cases. refrigerated.
- the illustrated refrigeration installation comprises a centralized cold production system 1 and points of use such as refrigerated display cases 2, 3, and 4 respectively represented schematically by rectangles in broken lines.
- the centralized cold production system 1 includes mainly one or more compression stages constituted by motor-compressors 5 and a condenser 6.
- the refrigerated display cases 2, 3 and 4 include sets of evaporators 7, 8 and 9 supplied in parallel with liquid refrigerant through regulators 10, 11 and 12. In this installation, the hot compressed refrigerant leaving the motor compressors 5 passes through the condenser 6 to transform into fluid in the form of liquid and expands in the evaporator assemblies 7, 8 and 9, producing cold.
- the gaseous expanded refrigerant leaving the evaporator assemblies 7, 8, 9 respectively is precompressed in compressors 13, 14, 15 before being returned through a suction line 16 in the motor compressors 5 of the centralized cold production system 1.
- a precompression of the gaseous expanded refrigerant by the compressors 13, 14, 15 makes this gaseous refrigerant more dense at low pressure which makes it possible to transfer to the compressors of the centralized cold production system, a volume normal of this gaseous refrigerant through a connecting pipe 16 having a smaller diameter than that of a connecting pipe in a known refrigeration installation where no precompression of this fluid is carried out.
- a reduction in the diameter of this connecting pipe, associated with an increase in the density of this refrigerant by precompression of the latter, makes it possible to achieve, compared to a known refrigeration installation, an appreciable saving of raw material and consequently a reduction in the cost of the installation. Furthermore, precompression of the cold gaseous refrigerant collected at the outlet of the evaporator assemblies 7, 8, 9 makes it possible to bring this fluid to a higher temperature.
- a degree of precompression chosen according to the invention makes it possible to raise the temperature of this fluid to the level of the temperature of the ambient medium. It follows that at the level of the pipe 16 which transports a precompressed refrigerant whose temperature is equivalent to that of the medium ambient, no moisture condensation occurs on its surface and that this pipe does not require any insulation. Elimination of the thermal insulation of this refrigerant pipe which connects the evaporator assemblies 2, 3, 4 to the motor compressors 5 of the centralized cold production system 1, makes it possible to further strengthen the saving of raw materials and the lowering of the price cost of the
- the rise in temperature by precompression of the gaseous expanded refrigerant before the return of the latter to the compressors of the centralized cold production system facilitates the return to these compressors of their lubricating oil, driven by the refrigerant flow, because miscibility of the oil and of the gaseous refrigerant is favored by an increase in the temperature of this fluid.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Removal Of Water From Condensation And Defrosting (AREA)
Abstract
Description
La présente invention concerne une installation frigorifique à système de production de froid centralisé.The present invention relates to a refrigeration installation with a centralized cold production system.
Dans une installation frigorifique telle que celle des vitrines réfrigérées destinées à l'exposition des denrées alimentaires, le système de production de froid est habituellement regroupé ou centralisé dans un endroit différent de celui où se trouvent les vitrines. La liaison entre ces vitrines et le système de production de froid se fait par des canalisations qui assurent la circulation du fluide frigorigène. Un système de production de froid centralisé comprend d'une manière connue un certain nombre de motocompresseurs constituant un ou plusieurs étages de compression qui font passer le fluide frigorigène gazeux de son état basse pression à leur entrée, à l'état de fluide à haute pression à leur sortie, et un condenseur qui laisse ce fluide à haute pression se transformer en liquide avant d'être réparti dans des évaporateurs des vitrines de l'installation. Le fluide frigorigène liquide en se détendant dans ces évaporateurs fournit du froid à ces vitrines, et retourne sous forme gazeux à l'entrée des motocompresseurs du système de production de froid centralisé. Le fluide frigorigène gazeux ayant fourni du froid et sortant des évaporateurs, reste encore à une température inférieure à la température ambiante jusqu'à son arrivée à ces motocompresseurs. La canalisation qui relie les évaporateurs de ces vitrines aux motocompresseurs du système de production de froid centralisé et qui assure la circulation de ce fluide gazeux froid, est habituellement calorifugé pour éviter une gênante condensation de l'humidité sur sa longueur et une perturbation de la climatisation de l'endroit où traverse cette canalisation. Cette canalisation a en outre un diamètre relativement grand afin de donner à ce fluide frigorigène gazeux, un débit suffisant pour alimenter ces motocompresseurs sans perturber le fonctionnement normal du circuit frigorifique de l'installation.In a refrigeration installation such as that of refrigerated display cases intended for the exhibition of foodstuffs, the cold production system is usually grouped together or centralized in a different location from that where the display cases are located. The connection between these showcases and the cold production system is made by pipes which ensure the circulation of the refrigerant. A centralized cold production system comprises, in a known manner, a certain number of motor compressors constituting one or more compression stages which pass the gaseous refrigerant from its low pressure state at their inlet, to the state of high pressure fluid at their outlet, and a condenser which lets this high pressure fluid transform into liquid before being distributed in the evaporators of the showcases of the installation. The liquid refrigerant by expanding in these evaporators provides cold to these showcases, and returns in gaseous form to the inlet of the compressors of the centralized cold production system. The gaseous refrigerant having supplied cold and leaving the evaporators, still remains at a temperature below ambient temperature until it arrives at these motor-compressors. The pipe which connects the evaporators of these showcases to the motor compressors of the centralized cold production system and which ensures the circulation of this cold gaseous fluid, is usually insulated to avoid annoying condensation of moisture along its length and a disturbance of the air conditioning from where this pipeline crosses. This pipe also has a relatively large diameter in order to give this gaseous refrigerant a sufficient flow to supply these motorcycles. compressors without disturbing the normal operation of the refrigeration circuit of the installation.
La présente invention, visant à apporter une amélioration à une installation frigorifique à système de production de froid centralisé, permettant principalement de supprimer le calorifugeage habituel de la canalisation pour fluide frigorigène reliant les évaporateurs à l'entrée des motocompresseurs de ce système de production de froid et de réduire d'une manière appréciable le diamètre de cette canalisation sans compromettre le fonctionnement normal de l'installation, a pour objet une installation frigorifique efficace et économique à système de production de froid centralisé.The present invention, aiming to bring an improvement to a refrigeration installation with a centralized cold production system, mainly allowing to eliminate the usual insulation of the refrigerant pipe connecting the evaporators to the input of the motor compressors of this cold production system and to reduce appreciably the diameter of this pipe without compromising the normal operation of the installation, has for its object an efficient and economic refrigeration installation with centralized cold production system.
Selon l'invention, une installation frigorifique à système de production de froid centralisé dans laquelle existe une canalisation pour fluide frigorigène, qui assure une liaison entre des ensembles d'évaporateurs des points d'utilisation et des motocompresseurs de ce système de production de froid centralisé et au moins un compresseur monté en amont de cette canalisation de liaison à la sortie de ces ensembles d'évaporateurs, caractérisé en ce que pour obtenir une réduction du diamètre de la canalisation de liaison et une absence de calorifugeage de celle-ci elle comprend des compresseurs assuant une précompression du fluide frigorigène détendu gazeux sortant des ensembles d'évaporateurs en vue de le rendre plus dense et une élévation de sa température à un niveau équivalent à celui de la température du milieu ambiant.According to the invention, a refrigeration installation with centralized cold production system in which there is a pipe for refrigerant, which provides a connection between sets of evaporators of the points of use and the compressors of this centralized cold production system and at least one compressor mounted upstream of this connecting pipe at the outlet of these evaporator assemblies, characterized in that, in order to obtain a reduction in the diameter of the connecting pipe and an absence of insulation of the latter, it comprises compressors providing precompression of the gaseous expanded refrigerant leaving the evaporator assemblies in order to make it denser and raising its temperature to a level equivalent to that of the temperature of the ambient medium.
Pour mieux faire comprendre l'invention on décrit ci-après un exemple de réalisation illustré par un dessin ci-annexé qui représente une vue schématique d'une installation frigorifique à système de production de froid centralisé comprenant plusieurs points d'utilisation tels que des vitrines réfrigérées.To better understand the invention, an embodiment is illustrated below, illustrated by an appended drawing which represents a schematic view of a refrigeration installation with a centralized cold production system comprising several points of use such as display cases. refrigerated.
L'installation frigorifique illustrée comprend un système de production de froid centralisé 1 et des points d'utilisation tels que des vitrines réfrigérées 2, 3, et 4 respectivement représentées schématiquement par des rectangles en traits discontinus.The illustrated refrigeration installation comprises a centralized cold production system 1 and points of use such as refrigerated display cases 2, 3, and 4 respectively represented schematically by rectangles in broken lines.
Le système de production de froid centralisé 1 comprend principalement un ou plusieurs étages de compression constitués par des motocompresseurs 5 et un condenseur 6. Les vitrines réfrigérées 2, 3 et 4 comprennent des ensembles d'évaporateurs 7, 8 et 9 alimentés en parallèle en fluide frigorigène liquide à travers des détendeurs 10, 11 et 12. Dans cette installation, le fluide frigorigène comprimé, chaud sortant des motocompresseurs 5, passe dans le condenseur 6 pour se transformer en fluide sous forme de liquide et se détend dans les ensembles d'évaporateurs 7, 8 et 9 en y produisant du froid.The centralized cold production system 1 includes mainly one or more compression stages constituted by motor-
Selon l'invention, le fluide frigorigène détendu gazeux sortant respectivement des ensembles d'évaporateurs 7, 8, 9 est précomprimé dans des compresseurs 13, 14, 15 avant d'être renvoyé à travers une canalisation d'aspiration 16 dans les motocompresseurs 5 du système de production de froid centralisé 1. Une précompression du fluide frigorigène détendu gazeux par les compresseurs 13, 14, 15 rend plus dense à basse pression ce fluide frigorigène gazeux ce qui permet de tranférer aux motocompresseurs du système de production de froid centralisé, un volume normal de ce fluide frigorigène gazeux à travers une canalisation de liaison 16 présentant un diamètre plus faible que celui d'une canalisation de liaison dans une installation frigorifique connue où aucune précompression de ce fluide n'est effectuée. Une réduction de diamètre de cette canalisation de liaison, associée à une augmentation de la densité de ce fluide frigorigène par précompression de ce dernier, permet de réaliser par rapport à une installation frigorifique connue, une apprèciable économie de matière première et par conséquent une réduction du prix de revient de l'installation. Par ailleurs une précompression du fluide frigorigène gazeux froid recueilli à la sortie des ensembles d'évaporateurs 7, 8, 9 permet de porter ce fluide à une température plus élevée. Un degré de précompression choisi selon l'invention permet d'élever la température de ce fluide au niveau de la température du milieu ambiant. Il en résulte qu'au niveau de la canalisation 16 qui transporte un fluide frigorigène précomprimé dont la température est équivalente à celle du milieu ambiant, ne se produit aucune condensation d'humidité sur sa surface et que cette canalisation ne nécessite aucun calorifugeage. Une élimination du calorifugeage de cette canalisation pour fluide frigorigène qui relie les ensembles d'évaporateurs 2, 3, 4 aux motocompresseurs 5 du système de production de froid centralisé 1, permet de renforcer encore l'économie de matière première et l'abaissement du prix de revient de l'installation.According to the invention, the gaseous expanded refrigerant leaving the
En dehors de ces économies, l'élévation de la température par précompression du fluide frigorigène détendu gazeux avant le retour de ce dernier aux motocompresseurs du système de production de froid centralisé, facilite le retour à ces motocompresseurs de leur huile de graissage, entraînée par le courant de fluide frigorigène, car une miscibilité de l'huile et du fluide frigorigène gazeux est favorisé par une élévation de la température de ce fluide.In addition to these savings, the rise in temperature by precompression of the gaseous expanded refrigerant before the return of the latter to the compressors of the centralized cold production system, facilitates the return to these compressors of their lubricating oil, driven by the refrigerant flow, because miscibility of the oil and of the gaseous refrigerant is favored by an increase in the temperature of this fluid.
Enfin cette précompression du fluide frigorigène sortant des ensembles d'évaporateurs 7, 8, 9 permet selon l'invention d'améliorer le rendement de l'installation.Finally, this precompression of the refrigerant leaving the
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8307794A FR2545913B1 (en) | 1983-05-10 | 1983-05-10 | REFRIGERATION SYSTEM WITH CENTRALIZED COLD PRODUCTION SYSTEM |
| FR8307794 | 1983-05-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0126673A1 true EP0126673A1 (en) | 1984-11-28 |
| EP0126673B1 EP0126673B1 (en) | 1986-04-30 |
Family
ID=9288751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19840400903 Expired EP0126673B1 (en) | 1983-05-10 | 1984-05-03 | Refrigeration plant with centralized cold production |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0126673B1 (en) |
| DE (1) | DE3460111D1 (en) |
| ES (1) | ES8502778A1 (en) |
| FR (1) | FR2545913B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2598788A1 (en) * | 1986-05-15 | 1987-11-20 | Copeland Corp | Refrigeration device |
| US4748820A (en) * | 1984-01-11 | 1988-06-07 | Copeland Corporation | Refrigeration system |
| EP1921399A2 (en) * | 2006-11-13 | 2008-05-14 | Hussmann Corporation | Two stage transcritical refrigeration system |
| CN101535735B (en) * | 2006-11-21 | 2012-09-05 | 大金工业株式会社 | Air conditioner |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR431893A (en) * | 1911-07-04 | 1911-11-22 | Linde Eismasch Ag | Process for regulating refrigeration machines with three or more evaporators, for low temperatures |
| US1710300A (en) * | 1927-02-24 | 1929-04-23 | Dunkerley William | Refrigerating system |
| FR979196A (en) * | 1948-02-02 | 1951-04-23 | Escher Wyss & Cie Const Mec | Heat pump refrigeration or heating installation comprising several refrigeration or heating stations |
| GB660771A (en) * | 1949-02-03 | 1951-11-14 | Svenska Turbinfab Ab | Improvements in refrigerating machinery |
| US3580006A (en) * | 1969-04-14 | 1971-05-25 | Lester K Quick | Central refrigeration system with automatic standby compressor capacity |
| US3932159A (en) * | 1973-12-07 | 1976-01-13 | Enserch Corporation | Refrigerant expander compressor |
| FR2365763A2 (en) * | 1972-05-24 | 1978-04-21 | Gaspard Andre | Multi-room air conditioning system - has automatic valve and capillary tube for each room evaporator |
| FR2432692A1 (en) * | 1978-08-03 | 1980-02-29 | Audi Ag | COMPRESSION HEAT PUMP |
-
1983
- 1983-05-10 FR FR8307794A patent/FR2545913B1/en not_active Expired
-
1984
- 1984-05-03 DE DE8484400903T patent/DE3460111D1/en not_active Expired
- 1984-05-03 EP EP19840400903 patent/EP0126673B1/en not_active Expired
- 1984-05-09 ES ES532323A patent/ES8502778A1/en not_active Expired
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR431893A (en) * | 1911-07-04 | 1911-11-22 | Linde Eismasch Ag | Process for regulating refrigeration machines with three or more evaporators, for low temperatures |
| US1710300A (en) * | 1927-02-24 | 1929-04-23 | Dunkerley William | Refrigerating system |
| FR979196A (en) * | 1948-02-02 | 1951-04-23 | Escher Wyss & Cie Const Mec | Heat pump refrigeration or heating installation comprising several refrigeration or heating stations |
| GB660771A (en) * | 1949-02-03 | 1951-11-14 | Svenska Turbinfab Ab | Improvements in refrigerating machinery |
| US3580006A (en) * | 1969-04-14 | 1971-05-25 | Lester K Quick | Central refrigeration system with automatic standby compressor capacity |
| FR2365763A2 (en) * | 1972-05-24 | 1978-04-21 | Gaspard Andre | Multi-room air conditioning system - has automatic valve and capillary tube for each room evaporator |
| US3932159A (en) * | 1973-12-07 | 1976-01-13 | Enserch Corporation | Refrigerant expander compressor |
| FR2432692A1 (en) * | 1978-08-03 | 1980-02-29 | Audi Ag | COMPRESSION HEAT PUMP |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4748820A (en) * | 1984-01-11 | 1988-06-07 | Copeland Corporation | Refrigeration system |
| FR2598788A1 (en) * | 1986-05-15 | 1987-11-20 | Copeland Corp | Refrigeration device |
| FR2609326A1 (en) * | 1987-01-07 | 1988-07-08 | Copeland Corp | REFRIGERATION SYSTEM, PARTICULARLY FOR FOOD DISPLAY FURNITURE |
| GB2199931A (en) * | 1987-01-07 | 1988-07-20 | Copeland Corp | Refrigeration system |
| GB2232471A (en) * | 1987-01-07 | 1990-12-12 | Copeland Corp | Refrigeration system |
| AU606371B2 (en) * | 1987-01-07 | 1991-02-07 | Copeland Corporation | Refrigeration system |
| GB2199931B (en) * | 1987-01-07 | 1991-04-24 | Copeland Corp | Refrigeration system |
| GB2232471B (en) * | 1987-01-07 | 1991-04-24 | Copeland Corp | Refrigeration system |
| AU629058B2 (en) * | 1987-01-07 | 1992-09-24 | Copeland Corporation | Refrigeration system |
| EP1921399A2 (en) * | 2006-11-13 | 2008-05-14 | Hussmann Corporation | Two stage transcritical refrigeration system |
| EP1921399A3 (en) * | 2006-11-13 | 2010-03-10 | Hussmann Corporation | Two stage transcritical refrigeration system |
| CN101535735B (en) * | 2006-11-21 | 2012-09-05 | 大金工业株式会社 | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2545913A1 (en) | 1984-11-16 |
| ES532323A0 (en) | 1985-01-16 |
| FR2545913B1 (en) | 1985-10-11 |
| DE3460111D1 (en) | 1986-06-05 |
| ES8502778A1 (en) | 1985-01-16 |
| EP0126673B1 (en) | 1986-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
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