EP2310773A1 - Remote refrigeration display case system - Google Patents
Remote refrigeration display case systemInfo
- Publication number
- EP2310773A1 EP2310773A1 EP08772997A EP08772997A EP2310773A1 EP 2310773 A1 EP2310773 A1 EP 2310773A1 EP 08772997 A EP08772997 A EP 08772997A EP 08772997 A EP08772997 A EP 08772997A EP 2310773 A1 EP2310773 A1 EP 2310773A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- display case
- evaporator
- refrigeration
- case system
- condenser
- 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- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
-
- 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
- A47F3/0404—Cases or cabinets of the closed type
- A47F3/0426—Details
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
-
- 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
- F25D15/00—Devices not covered by group F25D11/00 or F25D13/00, e.g. non-self-contained movable devices
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
Definitions
- the present invention relates generally to a remote refrigeration display case system, which is used in the field of commercial cooling systems to display and preserve refrigerated foodstuff or the like.
- a refrigeration display case system is equipped in the supermarket and convenient stores to present fresh food or drinks to the customers.
- All refrigeration display case systems include at least the following components: a compressor, a condenser, at least one evaporator associated with a display case, an expansion/throttle device such as expansion valve, and appropriate refrigerant pipes connecting these devices.
- the expansion valve is disposed in the pipe upstream with respect to refrigerant flow of the inlet to the evaporator for expanding liquid refrigerant.
- the expansion valve functions to expand the liquid refrigerant to a desired lower pressure, selected for the particular refrigerant, prior to entering the evaporator. As a result of this expansion, the temperature of the liquid refrigerant also falls down significantly.
- the low pressure, low temperature liquid evaporates as it absorbs heat in passing through the evaporator tubes from the air passing over the surface of the evaporator.
- supermarket and convenient store refrigeration systems include multiple evaporators disposed in multiple display cases, an assembly of a plurality of compressors, termed a compressor rack, and one or more condensers.
- an operation evaporating temperature of the condenser and compressor is about -15°C, and the evaporating temperature of the commonly adopted evaporator is about -10°C to -8 "CAs all known, the performance of the condenser and compressor varies as the evaporating temperature and the condensing temperature, wherein particularly the refrigeration efficiency falls as the evaporating temperature drops. In this regard, to obtain higher refrigeration efficiency, the evaporating temperature should be kept as high as possible.
- An object of the present application is to provide a remote refrigeration display case system including a display case comprising a product display area and at least one compartment separated from the display area, air flow passages for connecting the air between the display area and the compartments, and a refrigeration system including a air condition duty compressor, a condenser, an expansion/throttle device, a evaporator, and pipes connecting these components, wherein the air condition duty compressor and the condenser are installed remotely, and the saturated evaporating temperature of the evaporator is -4 to 2 ° C.
- Fig. 1 shows a schematic block diagram of a refrigeration display case system with a condensing unit(CDU) according to one or more aspects of the invention
- Fig. 2 shows an elevation view of representative layout of the remote refrigeration display system shown schematically in FIG. 1.
- FIGS. 1 and 2 depicted as having a single evaporator associated with a refrigeration display case, a single condenser, and a single compressor.
- the refrigeration display case may be used in various embodiments of commercial refrigeration systems having single or multiple display cases, with one or more evaporators per case , single or multiple condensers and/or single or multiple compressor arrangements.
- Fig. 1 is a schematic block diagram of a refrigeration display case system with a condensing unit (CDU) according to one or more aspects of the invention.
- CDU condensing unit
- a preferred refrigeration display case consists of five basic components, a condensing unit 010 including a compressor 01 land a condenser 012 therein, an expansion/throttle device 020, an evaporator 030 associated with a refrigeration display case 100, and a pressure balance device 040 having a capillary tube 041 and a solenoid valve 042, as well as the pipes 050 used for connecting these components.
- the refrigeration system may include additional components, controls and accessories.
- the evaporating temperature of compressor 01 1 could be above -5°C.
- the expansion device 020 most advantageously comprises an expansion valve having a thermal sensing element, such as a sensing bulb mounted in thermal contact with suction line downstream of the outlet of the evaporator 030.
- the sensing bulb connects back to the thermostatic expansion valve 020 through a conventional capillary tube 041 and a solenoid valve 042, wherein the capillary tube 041 and solenoid valve 042 constitute a pressure balance device 040, which is added between the high and low pressure pipes in order to balance the pressure during the compressor stopping time.
- a high efficiency evaporator mentioned the US patent 6460372B1, is employed as the evaporator in the present embodiment, the evaporating temperature of which is -4 ° C to 2 ° C.
- the refrigerant from the compressor 01 1 is transmitted into the condenser 012 and then cooled down therein.
- compressor 011 and condenser 012 construct a condensing unit (CDU), which is installed remotely. After being processed in the CDU, the refrigerant is depressed by the expansion/throttle device 020 and flows into the evaporator.
- the evaporator functions to evaporate the refrigerant and to drop down the temperature to a desired level.
- the saturated evaporating temperature is increased to be higher than -5 "C, and the compressing ratio is reduced, as a result of which cost effective A.C. duty compressor can be employed.
- the refrigeration display case 100 includes an upright, open-front, insulated cabinet 110 with a product display area 140 therein and a compartment 120.
- the evaporator 030 which is a fin and tube heat exchanger coil, is disposed within compartment 120 separate from and, in the depicted embodiment, beneath the product display area 140.
- the compartment 120 may, however, be disposed above or behind the product display area as desired.
- air circulation means for example one or more fans 130, disposed in the compartment 120, through the air flow passages 112, 114 and 116 formed in the walls of the cabinet 110 into the product display area 140 to maintain products stored on the shelves 150 in the product display area 140 at a desired temperature.
- a portion of the refrigerated air passes out the airflow passage generally downwardly across the front of the display area 140 thereby forming an air curtain between the refrigerated product display area 140 and the ambient temperature in the region of the store near the display case lOO.
- the expansion/throttle device 020 which is generally located within the display case 100 close to the evaporator 030 , but may be mounted at any location in the pipes, serves to meter the correct amount of liquid refrigerant flow into the evaporator 030.
- the evaporator pressure balance device 040 which may comprise a capillary tube 041 and a solenoid valve 042, operates to maintain the pressure in the evaporator at a preselected desired operating pressure by modulating the flow of refrigerant leaving the evaporate.
- the temperature of the refrigerant expanding from a liquid to a vapor within the evaporator 030 will be maintained at a specific temperature associated with the particular refrigerant passing through the evaporator.
- the display case system adopting aforesaid technical solutions can reduce the power consumption by 20%, and can be produced with lower cost. Furthermore, the display case system according to the above embodiment operates with lower noise level and higher reliability.
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)
- Freezers Or Refrigerated Showcases (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2008/001244 WO2010000088A1 (en) | 2008-06-30 | 2008-06-30 | Remote refrigeration display case system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2310773A1 true EP2310773A1 (en) | 2011-04-20 |
| EP2310773A4 EP2310773A4 (en) | 2014-01-01 |
Family
ID=41465442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08772997.6A Withdrawn EP2310773A4 (en) | 2008-06-30 | 2008-06-30 | Remote refrigeration display case system |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2310773A4 (en) |
| CN (1) | CN102077043A (en) |
| WO (1) | WO2010000088A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009009143A1 (en) | 2007-07-11 | 2009-01-15 | Gr Intellectual Reserve, Llc | Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) resulting therefrom |
| CN107752587A (en) * | 2016-08-16 | 2018-03-06 | 开利公司 | Refrigerated display case, refrigeration system and constant-temperature control method |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56110864A (en) | 1980-02-07 | 1981-09-02 | Mitsubishi Electric Corp | Heat accumulation type heat recovery system |
| US4748820A (en) * | 1984-01-11 | 1988-06-07 | Copeland Corporation | Refrigeration system |
| JPH0650646A (en) | 1992-07-31 | 1994-02-25 | Sanyo Electric Co Ltd | Refrigerator |
| JPH08128760A (en) * | 1994-10-28 | 1996-05-21 | Hitachi Ltd | Air conditioner |
| JPH09145245A (en) * | 1995-11-20 | 1997-06-06 | Sanyo Electric Co Ltd | Cooling showcase |
| CN1197191A (en) * | 1997-03-11 | 1998-10-28 | 三电有限公司 | Refrigerating/freezing display case unit |
| US6324856B1 (en) * | 2000-07-07 | 2001-12-04 | Spx Corporation | Multiple stage cascade refrigeration system having temperature responsive flow control and method |
| US6460372B1 (en) | 2001-05-04 | 2002-10-08 | Carrier Corporation | Evaporator for medium temperature refrigerated merchandiser |
| EP1963760A4 (en) * | 2005-03-18 | 2011-03-09 | Carrier Comm Refrigeration Inc | High side pressure regulation for transcritical vapor compression |
| US20070089453A1 (en) * | 2005-10-20 | 2007-04-26 | Hussmann Corporation | Refrigeration system with distributed compressors |
| JP2010507770A (en) * | 2006-09-18 | 2010-03-11 | キャリア コーポレイション | Refrigeration system with expander bypass |
| GB2442241B (en) * | 2006-09-29 | 2008-11-26 | Sew Hing Woo | Improved refrigeration apparatus for supermarkets |
-
2008
- 2008-06-30 EP EP08772997.6A patent/EP2310773A4/en not_active Withdrawn
- 2008-06-30 WO PCT/CN2008/001244 patent/WO2010000088A1/en not_active Ceased
- 2008-06-30 CN CN2008801301460A patent/CN102077043A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010000088A1 (en) | 2010-01-07 |
| EP2310773A4 (en) | 2014-01-01 |
| CN102077043A (en) | 2011-05-25 |
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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 |
|
| 17P | Request for examination filed |
Effective date: 20110128 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
| DAX | Request for extension of the european patent (deleted) | ||
| A4 | Supplementary search report drawn up and despatched |
Effective date: 20131128 |
|
| RIC1 | Information provided on ipc code assigned before grant |
Ipc: F25D 17/06 20060101AFI20131122BHEP Ipc: F25D 15/00 20060101ALI20131122BHEP Ipc: F25B 41/06 20060101ALN20131122BHEP |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20170503 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20181017 |