US20040163401A1 - Refrigerated display merchandiser with improved air curtain - Google Patents

Refrigerated display merchandiser with improved air curtain Download PDF

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Publication number
US20040163401A1
US20040163401A1 US10/752,134 US75213404A US2004163401A1 US 20040163401 A1 US20040163401 A1 US 20040163401A1 US 75213404 A US75213404 A US 75213404A US 2004163401 A1 US2004163401 A1 US 2004163401A1
Authority
US
United States
Prior art keywords
air
air curtain
curtain
discharge velocity
refrigerated
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.)
Abandoned
Application number
US10/752,134
Other languages
English (en)
Inventor
Abbas Alahyari
Mary Saroka
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.)
Hill Phoenix Inc
Original Assignee
Carrier Comercial Refrigeration Inc
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
Priority to US10/752,134 priority Critical patent/US20040163401A1/en
Application filed by Carrier Comercial Refrigeration Inc filed Critical Carrier Comercial Refrigeration Inc
Priority to KR1020057015920A priority patent/KR100669308B1/ko
Priority to PCT/US2004/004935 priority patent/WO2004075694A1/en
Priority to EP04712421A priority patent/EP1596692A1/en
Priority to BRPI0407819-5A priority patent/BRPI0407819A/pt
Priority to CA002517219A priority patent/CA2517219C/en
Priority to MXPA05009078A priority patent/MXPA05009078A/es
Assigned to CARRIER COMMERCIAL REFRIGERATION reassignment CARRIER COMMERCIAL REFRIGERATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALAHYARI, ABBAS A., SAROKA, MARY D.
Publication of US20040163401A1 publication Critical patent/US20040163401A1/en
Priority to US11/018,281 priority patent/US7162882B2/en
Priority to RU2006128621/12A priority patent/RU2006128621A/ru
Priority to PCT/US2005/000347 priority patent/WO2005072566A1/en
Priority to AU2005209161A priority patent/AU2005209161B8/en
Priority to CNA2005800019929A priority patent/CN1909817A/zh
Priority to KR1020067013472A priority patent/KR20060127018A/ko
Priority to EP05711288A priority patent/EP1703825A4/en
Assigned to HILL PHOENIX, INC. reassignment HILL PHOENIX, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CARRIER COMMERCIAL REFRIGERATION, INC., CARRIER CORPORATION
Priority to US12/488,411 priority patent/US20090255287A1/en
Abandoned legal-status Critical Current

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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
    • 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

Definitions

  • the present invention relates generally to refrigerated display merchandisers of the type used in supermarkets, mini-marts, convenience stores and other commercial establishments for displaying and merchandising refrigerated or frozen products for sale. More particularly, the present invention relates to open-front refrigerated display merchandisers of the type wherein a curtain of cold refrigerated air is passed downwardly across the open front product display region of the merchandiser.
  • Refrigerated display merchandisers also commonly referred to as display cases, having open front display regions are commonly used in supermarkets, mini-marts, convenience stores and other commercial establishments for displaying and merchandising refrigerated or frozen products for sale.
  • the open front nature of such display cases permits the consumer to simply reach into the product display region to select and remove a product for purchase without the inconvenience of needing to open a door to access the product.
  • a curtain of cold refrigerated air is passed downwardly at a relatively high velocity across the open front of the display case to form an invisible boundary between the product display region and the region of the store in front of the display case.
  • This air curtain not only helps retain cool refrigerated air within the product display region of the display case, thereby cooling the display product on the shelves of the display case, but also functions to isolate, to a certain extent, the product display region from the ambient air within the store.
  • Ambient air that does enter into open product display region undesirably causes increased energy consumption by increasing the cooling demand on the refrigeration system associated with the display case. Further, such ambient air may also cause a local temperature rise within the product display region sufficient to result in an undesirable rise in product temperature that could adversely impact upon product quality.
  • a problem encountered with when passing a curtain of refrigerated air downwardly across the open front of the product display region of the display case lies in the entrainment of ambient air into the stream of refrigerated air forming the air curtain.
  • Turbulence exists at the boundary between the relatively high velocity curtain air and the generally quiescent ambient air lying in front of the display case.
  • some ambient air is undesirably entrained into the air curtain.
  • Multiple air curtain display cases have been developed in the prior art to address this entrainment problem.
  • display cases having two adjacent, parallel, but independently generated, air curtains of refrigerated air are common in the art.
  • the outermost air curtain has a slightly higher temperature than the innermost air curtain, so as to protect the colder innermost air curtain from the impact of ambient air entrainment.
  • 5,345,778 and 5,357,767 each disclose establishing an ambient air curtain outwardly of a pair of refrigerated air curtains.
  • the curtain closest the product display region of the display case is coolest, while the center curtain is at a temperature slightly warmer than the innermost curtain, but substantially cooler than the outermost ambient air curtain.
  • the center curtain of warmer refrigerated air serves to buffer the innermost colder refrigerated air curtain from warm air intrusion from the outermost ambient air curtain.
  • the outermost curtain of ambient air is directed substantially vertically downwardly, either parallel to and adjacent the center air curtain or slightly inwardly toward the center air curtain, so as to preclude refrigerated air from the center and innermost refrigerated air curtains from spilling out of the product display region of the display case.
  • the outermost ambient air curtain itself ideally spills into the store near the base of the display case so as to not be drawn into the air return inlets through which the refrigerated air curtains return to the evaporator compartment.
  • the refrigerated merchandiser of the present invention includes a display case defining a product display region having an open-front isolated from the ambient air of the store by means of a downwardly directed inner air curtain of relatively cold refrigerated air and a downwardly directed outer air curtain, most advantageously of relatively warmer air.
  • the discharge velocity of the outer air curtain is maintained at a velocity at least 1.4 times the discharge velocity of the inner air curtain, and most advantageously in the range of about 1.4 to about 2.4 times greater than the discharge velocity of the inner air stream.
  • the outer air curtain comprises ambient air.
  • FIG. 1 illustrates a side elevation profile of a preferred embodiment of a refrigerated merchandiser having an open-front display case with a dual stream air curtain separating a first environment within the display case from a second environment external of the display case;
  • FIG. 2 is a graphical presentation showing the variation of load demand on the cooling system associated with the refrigeration merchandiser as the air curtain velocity ratio changes.
  • the refrigerated merchandiser 10 includes an outer cabinet 12 and an inner cabinet liner 20 that defines within its bounds an open-front product display region 30 .
  • the outer cabinet has a base 13 , a rear wall 14 extending upwardly from the back of the base 13 , a top wall 15 extending forwardly from the rear wall and a pair of side walls 16 extending vertically from the base 13 to the top wall 15 and forwardly from the rear wall 14 .
  • the inner cabinet liner 20 has a top panel 28 , a back panel 26 , a bottom panel 24 and opposed side panels 23 which together bound the open-front product display region 30 .
  • Each of the cabinet base 13 , rear wall 14 , top wall 15 and side walls 16 is insulated, as in conventional practice, to thermally isolate the interior of the cabinet 12 , including the product display region 30 , from excessive heat transfer therethrough.
  • Perishable product 80 being merchandized may be displayed on shelves 18 disposed within the product display region 30 and upon the upper surface of the bottom panel 24 .
  • the product display region 30 has an open front 25 so as to permit consumers to not only view, but also reach into the product display region 30 to select and remove items of product 80 that they desire to purchase.
  • Product display region 30 is cooled in a conventional manner to a desired product temperature, typically to a temperature between ⁇ 10° F. to less than about 40° F., depending upon what product is being merchandised therein and whether the product is frozen or non-frozen.
  • the refrigerated merchandiser 10 further includes a refrigeration compartment 40 , typically disposed in the portion of the display cabinet 12 between the base 13 and the bottom panel 24 , as depicted in FIG. 1, wherein components of the refrigerant system, typically a tube coil evaporator 50 and a air mover 60 , such as for example one or more fans, are housed.
  • components of the refrigerant system typically a tube coil evaporator 50 and a air mover 60 , such as for example one or more fans, are housed.
  • the specific type of air mover employed is not relevant to or limiting of the present invention.
  • refrigerant passing through the tubes of the evaporator 40 cools air passing over the surface of the evaporator tubes.
  • the refrigerant is typically supplied from a remote refrigeration unit located elsewhere within the store.
  • the present invention may also be employed on stand-alone refrigerated merchandisers that include their own refrigeration unit for providing the cold refrigerant.
  • An air circulation duct 32 is formed between the rear wall 14 and the top wall 15 of the outer cabinet 12 and the back panel 26 and top panel 28 , respectively, of the inner cabinet liner 20 .
  • Air mover 60 serves to direct air from air inlet 42 through the compartment 40 so as to traverse evaporator 50 , and thence through duct 32 to a first air outlet 34 .
  • this circulating air has been cooled to a desired temperature as it traverses the evaporator 50 .
  • the cool refrigeration air is directed via vanes provided within the first air outlet 34 downwardly along first path across the open front 25 of the product display region back to air inlet 42 .
  • the refrigerating air is recycled and repeatedly recirculated through the compartment 40 and duct 32 to converse energy expended in cooling the refrigeration air.
  • a cool air curtain 45 is formed across the open-front product display region 30 from top to bottom thereof.
  • a plurality of openings 24 may be provided in the back panel 26 through which a portion of cold refrigerating air circulating through duct 32 may pass directly into the product display region 30 . This refrigerating air will also be drawn by the air mover back through the air inlet 42 into the compartment 40 to be recirculated.
  • a second air outlet 70 is provided outwardly of the first air outlet 34 at the top front of the cabinet 12 .
  • second air outlet 70 serves to direct relatively warm air generally downwardly along a second path lying outwardly of the first path followed by the cool refrigerating air.
  • a relatively warm outer air curtain 65 is formed outside, i.e. further away from the product display region 30 , of the relatively cool inner air curtain 45 .
  • the relatively warm outer air curtain 65 serves as a buffer between the relatively cool inner air curtain 45 and the ambient environment of the store.
  • first air outlet 34 and second air outlet 70 are located at top and forward region of display case 12 , with the second air outlet 70 being located outwardly of the first air outlet 34 , that is, closer to the front of the display cabinet 12 .
  • first air outlet 34 is in communication with duct 32 and directs relatively cool air driven by air mover 60 downwardly across open front of the product display region 30 to form the inner air curtain 45 .
  • the second air outlet 70 is in fluid communication with a source of relatively warm air, for example ambient air from the store, and directs relatively warm air driven by a second air mover 72 associated therewith downwardly to form an outer air curtain 65 .
  • the outer air curtain 65 is directed downwardly at a discharge velocity that is at least 1.4 times greater than the discharge velocity of the inner air curtain 45 .
  • discharge velocity refers to the velocity of the air stream discharging from its respective air outlet at the top of the display case 30 .
  • the discharge velocity of the inner air curtain 45 is the velocity of the air stream discharging from air outlet 34
  • the discharge velocity of the outer air curtain 65 is the velocity of the air stream discharging from air outlet 70 .
  • the discharge velocity of the outer air curtain 65 is maintained at a level of about 1.4 to about 2.4 times faster than the discharge velocity of the inner air stream 45 .
  • the vertical axis thereof represents the load reduction factor, which is the refrigeration load of the dual air curtain compared to the load for an inner air curtain only
  • the horizontal axis represents the ratio of the velocity of the outer air curtain in that of the inner air curtain. Accordingly, the lower the load reduction factor, the more effective is the dual air curtain.
  • the effectiveness of dual parallel air curtains as a barrier in reducing passage of flow across the air curtain is maximized by maintaining the ratio of the discharge velocity of the outer curtain to the discharge velocity of the inner curtain within the range of from about 1.4 to about 1.8.
  • Maintaining the air curtain velocity ratio within this range minimizes the velocity gradient, and therefore shear instabilities, between the adjacent air curtains along the length of the interface between the adjacent air curtains, thereby resulting in less entrainment of air from the higher velocity air curtain into the lower velocity air curtain. Therefore, an very effective separation barrier may be maintained between two environments through use of the present invention through a dual air curtain of parallel streams of a first and a second fluid by maintaining the discharge velocity of the outer air stream a level of about 1.4 to about 1.8 times faster than the discharge velocity of the inner air stream.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
  • Packages (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
US10/752,134 2003-01-07 2004-01-06 Refrigerated display merchandiser with improved air curtain Abandoned US20040163401A1 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
US10/752,134 US20040163401A1 (en) 2003-02-26 2004-01-06 Refrigerated display merchandiser with improved air curtain
KR1020057015920A KR100669308B1 (ko) 2003-02-26 2004-02-18 개선된 공기 커튼을 갖는 냉장 진열장
PCT/US2004/004935 WO2004075694A1 (en) 2003-02-26 2004-02-18 Refrigerated display merchandiser with improved air curtain
EP04712421A EP1596692A1 (en) 2003-02-26 2004-02-18 Refrigerated display merchandiser with improved air curtain
BRPI0407819-5A BRPI0407819A (pt) 2003-02-26 2004-02-18 expositor de mercadoria refrigerado
CA002517219A CA2517219C (en) 2003-02-26 2004-02-18 Refrigerated display merchandiser with improved air curtain
MXPA05009078A MXPA05009078A (es) 2003-02-26 2004-02-18 Aparato vendedor automatico con exhibicion refrigerada con cortina de aire mejorada.
US11/018,281 US7162882B2 (en) 2003-01-07 2004-12-21 Multi-band air curtain separation barrier
EP05711288A EP1703825A4 (en) 2004-01-06 2005-01-06 COOLING SYSTEM WITH IMPROVED AIR CURTAIN
RU2006128621/12A RU2006128621A (ru) 2004-01-06 2005-01-06 Охлаждаемая торговая установка
KR1020067013472A KR20060127018A (ko) 2004-01-06 2005-01-06 개선된 에어 커튼을 갖는 냉장 진열장
PCT/US2005/000347 WO2005072566A1 (en) 2004-01-06 2005-01-06 Refrigerated display merchandiser with improved air curtain
AU2005209161A AU2005209161B8 (en) 2004-01-06 2005-01-06 Refrigerated display merchandiser with improved air curtain
CNA2005800019929A CN1909817A (zh) 2004-01-06 2005-01-06 具有改进空气幕的冷藏陈列商品柜
US12/488,411 US20090255287A1 (en) 2003-02-26 2009-06-19 Refrigerated display merchandiser with improved air curtain

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37464003A 2003-02-26 2003-02-26
US10/752,134 US20040163401A1 (en) 2003-02-26 2004-01-06 Refrigerated display merchandiser with improved air curtain

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US37464003A Continuation-In-Part 2003-01-07 2003-02-26

Related Child Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2004/000137 Continuation-In-Part WO2004062762A2 (en) 2003-01-07 2004-01-06 Method for establishing an air curtain separation barrier
US12/488,411 Continuation US20090255287A1 (en) 2003-02-26 2009-06-19 Refrigerated display merchandiser with improved air curtain

Publications (1)

Publication Number Publication Date
US20040163401A1 true US20040163401A1 (en) 2004-08-26

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ID=32930203

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/752,134 Abandoned US20040163401A1 (en) 2003-01-07 2004-01-06 Refrigerated display merchandiser with improved air curtain
US12/488,411 Abandoned US20090255287A1 (en) 2003-02-26 2009-06-19 Refrigerated display merchandiser with improved air curtain

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/488,411 Abandoned US20090255287A1 (en) 2003-02-26 2009-06-19 Refrigerated display merchandiser with improved air curtain

Country Status (7)

Country Link
US (2) US20040163401A1 (pt)
EP (1) EP1596692A1 (pt)
KR (1) KR100669308B1 (pt)
BR (1) BRPI0407819A (pt)
CA (1) CA2517219C (pt)
MX (1) MXPA05009078A (pt)
WO (1) WO2004075694A1 (pt)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070251253A1 (en) * 2004-09-30 2007-11-01 Carrier Corporation Curtain Air Admission Assembly
US20090255287A1 (en) * 2003-02-26 2009-10-15 Hill Phoenix, Inc. Refrigerated display merchandiser with improved air curtain
EP1913314A4 (en) * 2005-08-12 2013-03-13 Carrier Corp THERMOELECTRIC COOLING FOR A COOLED SHOP
CN103300640A (zh) * 2012-11-29 2013-09-18 浙江盾安冷链系统有限公司 一种展示柜的高效冷空气循环风幕系统
US10314411B2 (en) 2016-05-25 2019-06-11 Hussmann Corporation Refrigerated merchandiser with airflow support system
US20210041156A1 (en) * 2019-08-09 2021-02-11 Samsung Electronics Co., Ltd. Refrigerator
US11085455B1 (en) * 2014-08-11 2021-08-10 Delta T, Llc System for regulating airflow associated with product for sale

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KR100705113B1 (ko) 2005-09-26 2007-04-06 기아자동차주식회사 자동차의 클러스터 크리닝장치
US8973385B2 (en) * 2007-03-02 2015-03-10 Hill Phoenix, Inc. Refrigeration system
US9675185B2 (en) 2010-04-23 2017-06-13 Hussmann Corporation Refrigerated merchandiser with shelf air discharge
US8713954B2 (en) 2010-08-23 2014-05-06 Hill Phoenix, Inc. Air curtain system for an open-front refrigerated case with dual temperature zones
KR20160059417A (ko) * 2014-11-18 2016-05-26 후지 덴키 가부시키가이샤 쇼케이스
US10016071B2 (en) * 2016-05-31 2018-07-10 Pepsico, Inc. Product merchandising systems and methods
US10629854B2 (en) 2017-08-18 2020-04-21 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Substrate pre-baking device
US20190142185A1 (en) 2017-11-10 2019-05-16 Hill Phoenix, Inc. Configuration for a heat exchanger in a temperature controlled case

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KR20050103968A (ko) 2005-11-01
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EP1596692A1 (en) 2005-11-23
WO2004075694A1 (en) 2004-09-10
US20090255287A1 (en) 2009-10-15
CA2517219C (en) 2009-07-21
BRPI0407819A (pt) 2006-02-14
CA2517219A1 (en) 2004-09-10

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