EP2336690A1 - Verfahren zur Erzeugung eines Kaltluftvorhangs für eine gekühlte Vitrine - Google Patents

Verfahren zur Erzeugung eines Kaltluftvorhangs für eine gekühlte Vitrine Download PDF

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Publication number
EP2336690A1
EP2336690A1 EP09460057A EP09460057A EP2336690A1 EP 2336690 A1 EP2336690 A1 EP 2336690A1 EP 09460057 A EP09460057 A EP 09460057A EP 09460057 A EP09460057 A EP 09460057A EP 2336690 A1 EP2336690 A1 EP 2336690A1
Authority
EP
European Patent Office
Prior art keywords
air
display case
flow
external
air curtain
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Withdrawn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
EP09460057A
Other languages
English (en)
French (fr)
Inventor
Tomasz Kukla
Krzysztof Swoboda
Grzegorz Ozóg
Mariusz Stankiewicz
Lech Gold
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.)
Jbg-2 Sp Zoo
Original Assignee
Jbg-2 Sp Zoo
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 Jbg-2 Sp Zoo filed Critical Jbg-2 Sp Zoo
Priority to EP09460057A priority Critical patent/EP2336690A1/de
Publication of EP2336690A1 publication Critical patent/EP2336690A1/de
Withdrawn legal-status Critical Current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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/023—Air curtain closures
    • 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
    • A47F3/0447—Cases or cabinets of the open type with forced air circulation with air curtains
    • 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

Definitions

  • the invention comprises the method of generating an air curtain for refrigerated display case, particularly for vertical one.
  • Refrigerated display cases are usually used in commercial establishments for storage and presentation purposes of food in temperatures lower than the ambient temperature.
  • Such display cases consist of a display chamber with thermally isolated walls and an open front and separated from the surroundings by an curtain of air cooled to a temperature below the temperature of the surroundings.
  • a vertical display case is included in the lower part of which air is sucked in from the outside, cooled down ad transported up, some of the air stream being fed to a display chamber open in the front, and the remaining part of the air stream flowing down to the downwardly directed outlet in the upper wall of the display chamber.
  • the cooled air floes downwards along the front part of the display chamber as a cool air stream, most of it at the bottom of the display case being sucked into the cool air system, losing the remaining part of the air stream that flows into the surroundings.
  • the disadvantage of the known solution is that it loses part of the cool and warm air streams, thus resulting in greater energy consumption in order to cool the air sucked in from the surroundings.
  • the solution according to the invention consists in that the external warm air stream of the air curtain is produced by sucking in at the bottom of the display case the cooled air that is a part of the internal cool air stream lost from the flow and supplemented by air from the surroundings. Having been sucked in, the two air streams mix with each other and are sent to the upper part of the display case, from where they are directed downwards as the external stream of the air curtain, with decreased difference in temperatures between the internal and external flows. Different temperature flows are isolated from each other during their transport by channels. Preferably, the external stream of the air curtain flows slower that the internal stream. The temperatures of both internal cool air stream and external warm air stream are lower than the ambient temperature.
  • the advantage of the presented method is that it enables to recover cold air released to the surroundings from the internal flow in front of the bottom part of the display case, and next to introduce it to the warmer air flow.
  • heat exchange between the flows decreases, and thus less energy is consumed for purposes of cooling the air introduced to the internal stream.
  • the tests conducted proved that energy consumption decreased by a few percent as a result of this.
  • a side effect of sealing the closed flow of cooler air is removing the reason for lowering the ambient temperature, which decreases the energy consumption for heating the room.
  • the solution according to the invention is illustrated by a sample embodiment, wherein the air curtain in front of the open-front display chamber of the display case consists of two tangent air flows, flowing generally vertically downwards.
  • the temperature of the internal air flow (closer to the display case) is lower than in case of the external stream (closer to the surroundings) and the former flows more slowly than the latter, this way preventing the two air streams from mixing and their temperatures becoming level.
  • the internal cool air flow is created by sucking in the air initially from the surroundings near the floor, cooling it down and transporting upwards along the display case, from where it is directed through the outlet downwards, generally vertically, along the open front of the display case. At the bottom, the major part of the internal flow is sucked into the closed circuit and the remaining part flows outside the inlet.
  • the cool air flow in the closed circuit is replenished with the air from external air flow or with the air from the surroundings
  • the external warm air flow is created by sucking in the air initially from the surroundings near the floor and transporting it upwards along the display case, from where it is directed through the outlet downwards, generally vertically, as the external flow of the air curtain tangent to the cooler air flow. At the bottom, part of the warmer air flow is sucked into the cooler air stream, majority to the closed circuit, and the remaining part is released to the surroundings. The air released to the surroundings is replaced by air sucked in to the closed circuit from the surroundings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
EP09460057A 2009-12-17 2009-12-17 Verfahren zur Erzeugung eines Kaltluftvorhangs für eine gekühlte Vitrine Withdrawn EP2336690A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09460057A EP2336690A1 (de) 2009-12-17 2009-12-17 Verfahren zur Erzeugung eines Kaltluftvorhangs für eine gekühlte Vitrine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09460057A EP2336690A1 (de) 2009-12-17 2009-12-17 Verfahren zur Erzeugung eines Kaltluftvorhangs für eine gekühlte Vitrine

Publications (1)

Publication Number Publication Date
EP2336690A1 true EP2336690A1 (de) 2011-06-22

Family

ID=42126008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09460057A Withdrawn EP2336690A1 (de) 2009-12-17 2009-12-17 Verfahren zur Erzeugung eines Kaltluftvorhangs für eine gekühlte Vitrine

Country Status (1)

Country Link
EP (1) EP2336690A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109716046A (zh) * 2016-12-15 2019-05-03 三星电子株式会社 冰箱

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756038A (en) * 1972-04-07 1973-09-04 Emhart Corp Refrigerated display equipment
GB2198220A (en) * 1986-09-27 1988-06-08 Barker George & Co Ltd Refrigeration display cabinet
FR2787979A1 (fr) * 1998-12-31 2000-07-07 Abc Synergie Meuble frigorifique de vente equipe d'un rideau d'air dedouble a debit constant
PL367690A1 (en) 2001-08-06 2005-03-07 Bonnet Neve Refrigerated display case, in particular vertical display case, with front refrigerated air curtain
US20070012059A1 (en) * 2005-07-12 2007-01-18 Hussmann Corporation Ambient air curtain with floor air inlet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756038A (en) * 1972-04-07 1973-09-04 Emhart Corp Refrigerated display equipment
GB2198220A (en) * 1986-09-27 1988-06-08 Barker George & Co Ltd Refrigeration display cabinet
FR2787979A1 (fr) * 1998-12-31 2000-07-07 Abc Synergie Meuble frigorifique de vente equipe d'un rideau d'air dedouble a debit constant
PL367690A1 (en) 2001-08-06 2005-03-07 Bonnet Neve Refrigerated display case, in particular vertical display case, with front refrigerated air curtain
US20070012059A1 (en) * 2005-07-12 2007-01-18 Hussmann Corporation Ambient air curtain with floor air inlet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109716046A (zh) * 2016-12-15 2019-05-03 三星电子株式会社 冰箱
CN109716046B (zh) * 2016-12-15 2022-01-04 三星电子株式会社 冰箱

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