EP2200483A2 - Carrosserie réfrigérée - Google Patents

Carrosserie réfrigérée

Info

Publication number
EP2200483A2
EP2200483A2 EP08839847A EP08839847A EP2200483A2 EP 2200483 A2 EP2200483 A2 EP 2200483A2 EP 08839847 A EP08839847 A EP 08839847A EP 08839847 A EP08839847 A EP 08839847A EP 2200483 A2 EP2200483 A2 EP 2200483A2
Authority
EP
European Patent Office
Prior art keywords
cooling
evaporator
display cabinet
air
temperature
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.)
Withdrawn
Application number
EP08839847A
Other languages
German (de)
English (en)
Other versions
EP2200483A4 (fr
Inventor
Zhong GU
Lianfu Zhu
Zhiwei He
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.)
Carrier Corp
Original Assignee
Carrier Corp
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 Carrier Corp filed Critical Carrier Corp
Publication of EP2200483A2 publication Critical patent/EP2200483A2/fr
Publication of EP2200483A4 publication Critical patent/EP2200483A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/04—Desuperheaters
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/141—Removal by evaporation
    • F25D2321/1412—Removal by evaporation using condenser heat or heat of desuperheaters
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/38—Refrigerating devices characterised by wheels

Definitions

  • the present disclosure relates to a complete display cabinet system, and in particular, to a self-contained plug-in product display cabinet system for preserving and refrigerating foods, beverages and fresh agricultural and livestock products.
  • plug-in product display cabinets for preserving and cooling (refrigerating) foods, beverages and fresh agricultural and livestock products are indispensable equipment for supermarkets and convenience stores.
  • Such display cabinets can be of an open type or they can also be provided with doors for providing a cooling environment for goods, such as fresh foods, beverages, etc. to be displayed to customers.
  • the refrigerating system of a display cabinet comprises at least the following parts: a compressor, a condenser, at least one evaporator incorporated in the display cabinet, a throttling mechanism, such as a float expansion valve, a thermal expansion valve or a throttle expansion valve (capillary), condenser, etc., and suitable refrigerant pipelines connecting these parts in a closed circulation loop.
  • the refrigerant in the evaporator boils to gasify under the evaporation pressure, the compressor continuously sucks the gas generated in the evaporator and compresses the same to a condensing pressure, and then sends the high-temperature and high-pressure refrigerant to the condenser, the refrigerant is isobarically cooled and condensed into a liquid under the condensing pressure, and the heat released when the refrigerant is cooled and condensed is transferred to the cooling medium (usually this is water or air).
  • the condensing temperature corresponding to the condensing pressure is above the temperature of the cooling medium.
  • the liquid refrigerant enters the evaporator via the throttling mechanism, and when the refrigerant passes through the expansion valve, the pressure is reduced from the condensation pressure to the evaporation pressure, a part of the liquid is gasified and the temperature of the rest of the liquid is lowered to the evaporation temperature, thereby the refrigerant coming out of the expansion valve becomes a two-phase mixture whose temperature is the evaporation temperature.
  • the liquid in the mixture evaporates in the evaporator, and during this process, the refrigerant absorbs latent heat it needs from the object being cooled or from the air, causing the temperature of the object being cooled or the air to be lowered to the required value.
  • the gasified refrigerant is again sucked by the compressor, so as to start a next cycle.
  • a freezing compressor is usually used as the core part of the system.
  • an air circulation system sends damp hot air returned from the display area to the evaporator, where the air exchanges heat with the refrigerant and becomes low-temperature, dry and cold air after having been cooled and dried, and then is injected into the product display area of the display cabinet via the cold air channel of the display cabinet to cool the displayed products; or, in an open type display cabinet, the low-temperature dry and cold air forms a cold air curtain between the product display area and the ambient air thereof, separating the products in the display area from the ambient.
  • the required evaporating operational evaporation temperature of the refrigeration system with freezing compressors must be lower than -6°C, (e.g., about -15 0 C), and the actual evaporating temperature of ordinary evaporators used is about -1O 0 C to -8 0 C.
  • -6°C e.g., about -15 0 C
  • the actual evaporating temperature of ordinary evaporators used is about -1O 0 C to -8 0 C.
  • the performance of a refrigerating compressor varies with the changes of the evaporation temperature and the condensing temperature, in which the evaporation temperature has more influence on the performance of the refrigerating compressor and therefore, the system performance.
  • the cooling capacity amount of refrigeration energy and the system efficiency of the refrigeration circuit drop significantly as the evaporation temperature lowers and therefore, in operation, as long as the temperature requirements by the objects to be cooled are met, the chiller should be kept at a relatively high evaporation temperature, so as to ensure a higher energy efficiency and a better energy economy.
  • a self-contained plug-in display cabinet system may be provided, in which the evaporator's evaporation temperature can be increased by 6-12 0 C, so that the compression ratio of the compressor can be reduced to meet the requirements of an air-conditioning compressor, thus an air-conditioning compressor can be used to realize the refrigeration circulation, thereby resulting in significant reduction of energy consumption and noise as well as the reduction of the costs of the product.
  • a complete display cabinet system may comprise: a display cabinet containing a product display area and a compartment separated from the display area; an airflow circulation channel connecting the display area of the display cabinet to the airflow within the compartment; and a cooling system disposed in the compartment of the display cabinet and comprising an air-conditioning compressor, a condenser, a throttling mechanism, a condenser and pipelines connecting these parts, wherein the evaporation temperature of the evaporator is -4 to 2 0 C.
  • the saturated suction temperature (SST) of the cooling system with air-conditioning compressor may be above -5 0 C.
  • the cooling system may further comprise condensed water evaporating and cooling means for pre-cooling the high-temperature and high-pressure refrigerant flowing out of the outlet of the air-conditioning compressor.
  • the condensed water evaporating and cooling means may comprise a cooling water container and a coiled pipe before the condenser disposed within the cooling water container, and the cooling water container can constantly collect and contain the water condensed on the surface of heat exchange fins of the evaporator for pre-cooling the refrigerant.
  • the display cabinet may contain a first compartment connected with the airflow circulation channel, and the evaporator may be disposed in the first compartment.
  • the display cabinet may further contain a second compartment, and the air-conditioning compressor, the condensed water evaporating and cooling means, the condenser and the throttling mechanism may be disposed in the second compartment.
  • a cooling system comprises an air-conditioning compressor, a condenser, a throttling mechanism, an evaporator and pipelines connecting these parts, in which the evaporation temperature of the evaporator is -4 to 2 0 C.
  • the saturated suction temperature of the cooling system with air-conditioning compressor may be above -5 0 C.
  • It may further comprise condensed water evaporating and cooling means for pre-cooling the high-temperature and high-pressure refrigerant flowing out of the outlet of the air-conditioning compressor.
  • the condensed water evaporating and cooling means may comprise a cooling water container and a pre-condenser coiled pipe disposed within the cooling water container, and the cooling water container can collect and contain the water condensed on the surface of heat exchange fins of the evaporator for pre-cooling the refrigerant.
  • the evaporation temperature of the evaporator can be increased by 6-12 0 C to between -4 0 C and 2 0 C, and by the adaptation of pre-cooling means, the condensate water from the evaporator pre-cools the refrigerant gas discharged by the compressor to decrease the condensing pressure, so as to make the working conditions of the core part of the system, i.e. the compressor, meet the requirements of an air-conditioning system and to realize the refrigeration circulation by an air-conditioning compressor.
  • the display cabinet system integrated by the above-mentioned parts may save energy by 49% and have better silencing effects and higher operational reliability. Furthermore, since the evaporation temperature of the system may be close to O 0 C, there is no need for the evaporator to be defrosted, which overcomes the drawback of the currently available display cabinet systems that the refrigeration circulation has to be interrupted for the evaporator to be defrosted, so as to save energy further and to be advantageous in keeping the temperature of the foods not being increased to protect displayed products.
  • Figure 1 is a diagram of a cooling refrigeration system.
  • Figure 2 is a schematic diagram of the structure of a self-contained plug-in display cabinet system .
  • the refrigeration system 20 comprises an air-conditioning compressor 21, condensed water evaporating and cooling (refrigerant precooling) means 22, a heat rejection heat exchanger (e.g., condenser) 23, a throttling mechanism (expansion device) 24 and a high-performance evaporator 25, which parts of the system are connected sequentially by connecting pipelines 26.
  • air-conditioning compressor 21 condensed water evaporating and cooling (refrigerant precooling) means 22
  • a heat rejection heat exchanger e.g., condenser
  • throttling mechanism expansion device
  • high-performance evaporator 25 which parts of the system are connected sequentially by connecting pipelines 26.
  • the saturated suction temperature (SST) of the air-conditioning compressor 21 is above -5 0 C
  • the condensed water evaporating and cooling means 22 can employ an evaporating cooling coiled pipe with a condensed water container, and the condensed water container is used to collect and contain the water 30 condensed on and flowing off the surface of heat exchange fins of the evaporator 25.
  • a float expansion valve, a thermal expansion valve or a throttle expansion valve can be selected as the throttling mechanism 24.
  • the evaporation temperature of the high-performance evaporator 25 is -4 to 2 0 C
  • a high-performance evaporator which was developed by the present applicant and has been granted US patent No. 6,460,372 Bl (the disclosure of which is incorporated by reference herein in its entirety as if set forth at length) can be selected as the high-performance evaporator 25.
  • the high-temperature and high-pressure refrigerant flowing out of the air-conditioning compressor 21 enters the condensed water evaporating and cooling means 22 via the pipeline 26, exchanges heat with the condensed water 30 discharged from the evaporator and is pre-cooled when passing through the coiled cooling pipe, and then enters the condenser 23 for cooling; the refrigerant becomes a low-temperature and low-pressure liquid or a two-phase liquid and gas mixture after having been throttled by the throttling mechanism 24, and then enters the evaporator 25.
  • the refrigerant evaporates in the evaporator 5, and during this process the refrigerant absorbs heat from the air or the object being cooled, which are in contact with the heat exchange fins of the evaporator 25, so that the temperature of the air or the object being cooled which are in contact with the heat exchange fins of the evaporator 25 is lowered to the required value. Since the evaporation temperature of the evaporator 25 is close to O 0 C, the moisture in the air is constantly condensed to water on the surface of the heat exchange fins of the evaporator 25, but does not freeze/frost.
  • the condensed water 21 flowing off the surface of the heat exchange fins of the evaporator 25 is collected and contained by using the condensed water container (e.g., tray or pan) 28 of the condensed water evaporating and cooling means 22 for pre-cooling the high-temperature and high-pressure refrigerant gas in the cooling coiled pipe 29 of the means 22 in the container.
  • the condensed water container e.g., tray or pan
  • the pre-cooling of the present disclosure differs, for example, from post-cooling (e.g., cooling between the condenser and the expansion device).
  • post-cooling e.g., cooling between the condenser and the expansion device.
  • WO2006/101564 discloses post-cooling to maximize cooling upstream of the expansion device. However, that does not maximize cooling of compressor discharged conditions and, thereby, does not maximize compressor protection and minimize the compression ratio.
  • the high-temperature and high-pressure refrigerant flowing out of the outlet of the compressor 21 is better cooled by using the condensed water evaporating and cooling means 22.
  • the evaporation temperature of the refrigerant flowing out of the outlet of the high-performance evaporator 25 can be increased by about 6-12 0 C to between -4 0 C and 2 0 C, so as to make the working conditions of the core part of the system, i.e. the compressor, meet the requirements of an air-conditioning system and to realize the above refrigeration circulation with the air-conditioning compressor.
  • the display cabinet system integrated by the above-mentioned parts, may save more energy and shows better silencing effects and higher operational reliability. Furthermore, since the evaporation temperature of the system is close to O 0 C, there is no need for the evaporator to be defrosted, which overcomes the drawbacks of the currently available display cabinet systems that the refrigeration circulation has to be interrupted for the evaporator to be defrosted, thereby saving more energy and being advantageous in keeping the temperature of the foods stable.
  • condensate collection and associated pre-cooling are distinguished from intermittent collection associated with collecting condensate melted from the evaporator during defrost. Whereas defrost condensate is collected only during a relatively small portion of the normal operating cycle, condensate may be collected and delivered to the cooling means 22 a much greater percentage of the time (e.g., 50-100% of the time, more narrowly, 90-100%).
  • the identified pre-cooling may be defined as occurring generally before the traditional cooling associated with the condenser (e.g., at least 50% of the pre-cooling occurring before at least 50% of the traditional air cooling of refrigerant in the condenser).
  • FIG. 2 shows a schematic diagram of the structure of the new self-contained plug-in display cabinet system 100 incorporating the refrigerant system 20.
  • the display cabinet system 100 comprises an upright front-open insulated cabinet 110 and a first compartment 120 and a second compartment 130 disposed below the insulated cabinet 110.
  • the insulated cabinet 110 can also be provided with a door 111, with airflow channels 112, 114, 116 and 118 being disposed on the inside of walls, in which the airflow channels 112, 118 are connected respectively with the first compartment 120.
  • the front-open area of the insulated cabinet 110 provides a product display area 140, in which several shelves 150 are disposed for displaying goods.
  • the evaporator 25 is disposed within the first compartment 120 of the display cabinet 100, while the air-conditioning compressor 21, the condensed water evaporating and cooling means 22, the condenser 23 and the throttling mechanism 24 are disposed within the second compartment 130, and all of these parts are connected by the connecting pipes 26.
  • the returned damp and hot air in the display area 140 is sucked using air circulation mean, such as a fan 27, into the first compartment 120 from the airflow channel 118, passes through the evaporator 25, comes into contact with the surface of heat exchange fins of the evaporator 25, becomes low-temperature and dry air after exchanging heat with the refrigerant and being cooled, and is discharged into the airflow channel 112 and to the product display area 140 via the airflow channels 114, 116, thereby lowering the temperature of the foods.
  • air circulation mean such as a fan 27
  • the moisture therein is condensed to water on the surface of the heat exchange fins of the evaporator 25 and flows off into the condensed water container of the condensed water evaporating and cooling means 22 below, to be used for pre-cooling the high-temperature and high-pressure refrigerant coming out of the outlet of the compressor 21.
  • the refrigerant coming out of the outlet of the evaporator 25 returns again to the air-conditioning compressor 21 for compression, thus forming a refrigeration circulation.
  • the above product display cabinet system employing the technical solution of the present disclosure saves energy by 49% and has the advantages of better silencing effects and higher operational reliability due to the integration of high COP and reliable air conditioning compressor used in cooling refrigeration system, high efficient evaporator to increase the evaporating pressure, and evaporator condensate pre-cooler to reduce condensing pressure to maximize the compression efficiency.
  • An example is given in the context of ISO23953-1 and the associated 3Ml, 3M2, and 3Hl case temperatures. 3 (ambient) M (MT)I (product temperature) - ambient 25C, Humidity 60% and product temperature -1 to 5 C.
  • an HT compressor may be used in an application normally requiring an MT compressor.
  • An exemplary such substitution may reduce the system pressure ratio from that of one without the cooling means.
  • the baseline system may have a system pressure ratio of (about 3.4 to about 3.6) to (about 2.4 to about 2.8) using R22 refrigerant.
  • the product display cabinet system 100 is not limited to the structure as described in the above embodiment, other alternative structures or embodiments can be proposed by a person skilled in the art.
  • the first and the second compartments 120, 130 can be disposed above the cabinet 110, or the positions of the first and the second compartments 120, 130 can be exchanged or there can be no division between them, or the positions of the airflow channels 112, 114, 116 and/or 118 can be varied, etc.
  • an embodiment is described above in detail, such description is not intended for limiting the scope of the present disclosure. It will be understood that various modifications may be made without departing from the spirit and scope of the disclosure. For example, when implemented in the reengineering of an existing container configuration, details of the existing configuration may influence or dictate details of any particular implementation. Accordingly, other embodiments are within the scope of the following claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Defrosting Systems (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Removal Of Water From Condensation And Defrosting (AREA)

Abstract

Dans un système d'armoire vitrée électrique autonome (100), la température d'évaporation de l'évaporateur (25) est comprise entre -4°C et 2°C, et avec l'adaptation d'un moyen de pré-refroidissement constant (22), le gaz frigorigène à température élevée et à pression élevée évacué par le compresseur (21) est pré-refroidi, permettant l'utilisation d'un faible taux de compression du système et, ainsi, un compresseur haute température (21). En outre, le dégivrage de l'évaporateur n'est plus nécessaire, ce qui permet de remédier aux inconvénients des systèmes d'armoires vitrées actuellement disponibles, caractérisés par le fait que les cycles de réfrigération doivent être interrompus pour dégivrer l'évaporateur, des économies d'énergie supplémentaires pouvant ainsi être réalisées et ledit système étant avantageux pour maintenir stable la température des aliments.
EP08839847.4A 2007-10-17 2008-10-17 Carrosserie réfrigérée Withdrawn EP2200483A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710181322.0A CN101413748A (zh) 2007-10-17 2007-10-17 整机展示柜系统
PCT/US2008/080301 WO2009052372A2 (fr) 2007-10-17 2008-10-17 Carrosserie réfrigérée

Publications (2)

Publication Number Publication Date
EP2200483A2 true EP2200483A2 (fr) 2010-06-30
EP2200483A4 EP2200483A4 (fr) 2013-11-20

Family

ID=40568079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08839847.4A Withdrawn EP2200483A4 (fr) 2007-10-17 2008-10-17 Carrosserie réfrigérée

Country Status (4)

Country Link
US (1) US20100300127A1 (fr)
EP (1) EP2200483A4 (fr)
CN (1) CN101413748A (fr)
WO (1) WO2009052372A2 (fr)

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EP3465017A1 (fr) 2016-05-27 2019-04-10 Electrolux Appliances Aktiebolag Climatiseur avec raccordement de fenêtre
CN107752587A (zh) * 2016-08-16 2018-03-06 开利公司 制冷展示柜、制冷系统及恒温控制方法
WO2019114944A1 (fr) 2017-12-13 2019-06-20 Electrolux Appliances Aktiebolag Climatiseur de fenêtre
WO2019114943A1 (fr) 2017-12-13 2019-06-20 Electrolux Appliances Aktiebolag Dispositif d'installation pour climatiseur à deux blocs
US11519615B2 (en) 2017-12-13 2022-12-06 Electrolux Appliances Aktiebolag Outdoor unit of an air conditioner
CN109236625B (zh) * 2018-08-30 2020-10-23 珠海格力电器股份有限公司 压缩机控制方法、装置及电器设备
US11116333B2 (en) 2019-05-07 2021-09-14 Carrier Corporation Refrigerated display cabinet including microchannel heat exchangers
US11559147B2 (en) 2019-05-07 2023-01-24 Carrier Corporation Refrigerated display cabinet utilizing a radial cross flow fan
CN111086736A (zh) * 2020-01-13 2020-05-01 广东多乐信电器有限公司 一种用于茶叶存储的冷气设备
CN111456972B (zh) * 2020-05-13 2024-07-26 珠海格力电器股份有限公司 电机冷却机构、风机装置及抽油烟机
CN113739502B (zh) * 2021-08-30 2024-10-01 江苏飒雪制冷设备工程有限公司 一种冷库制冷设备
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CN101413748A (zh) 2009-04-22
EP2200483A4 (fr) 2013-11-20
WO2009052372A2 (fr) 2009-04-23
WO2009052372A3 (fr) 2009-07-16

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