EP2166296B1 - Top-opening freezer with improved cooling gas flow - Google Patents

Top-opening freezer with improved cooling gas flow Download PDF

Info

Publication number
EP2166296B1
EP2166296B1 EP09179831A EP09179831A EP2166296B1 EP 2166296 B1 EP2166296 B1 EP 2166296B1 EP 09179831 A EP09179831 A EP 09179831A EP 09179831 A EP09179831 A EP 09179831A EP 2166296 B1 EP2166296 B1 EP 2166296B1
Authority
EP
European Patent Office
Prior art keywords
goods compartment
flow
cooling gas
wall
flow path
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.)
Not-in-force
Application number
EP09179831A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2166296A1 (en
Inventor
Wolfgang Zäpf
Markus Schu
Jens Dielmann
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
Priority to PL09179831T priority Critical patent/PL2166296T3/pl
Publication of EP2166296A1 publication Critical patent/EP2166296A1/en
Application granted granted Critical
Publication of EP2166296B1 publication Critical patent/EP2166296B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/061—Walls with conduit means
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/066—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply
    • F25D2317/0664—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply from the side

Definitions

  • the present invention is directed to a top-opening freezer having an improved cooling gas flow distribution.
  • the present invention is directed to a top-opening freezer as defined in the preamble of claim 1.
  • a freezer is known, for example, from DE-A1-23 20 208 .
  • Top-opening freezers are widely used. E.g. in supermarkets, top-opening freezers are used both for deep-freezing consumer products such as food and at the same time displaying these products to customers. In these top-opening freezers having e.g. the form of chests cold air remains in the goods compartment as the goods compartment is only open at its upper side and the cold air being heavier than the air of the surrounding environment is captured within the goods compartment.
  • cooling air curtain In order to reduce the heat entry due to customers grasping into the goods compartment cold air is conventionally directed across the top opening of the goods compartment thereby creating a cooling air curtain.
  • the flow path of the cooling air curtain usually extends from an opening in an upper portion of a front wall in the goods compartment to an upper portion of a rear wall.
  • DE 2320208 discloses a freezing chest with a top-opening goods compartment.
  • the opening is insulated against the environmental air by a cold air cushion produced by cooling means in a transition chamber surrounding the top-opening above the goods compartment.
  • a transition chamber surrounding the top-opening above the goods compartment.
  • at least one fan to maintain the cold air cushion by a continuous cold air stream.
  • the top-opening freezer according to the present invention is defined in claim 1.
  • the top-opening freezer comprises a side wall cooling means cooling at least one of the side walls of the goods compartment and being positioned between a side wall of the goods compartment and the outer casing.
  • a second flow path is provided such that cooling gas is guided in at least one channel positioned between a side wall of the goods compartment and the outer casing.
  • cooling gas can flow in a closed loop.
  • the cooling gas is provided by cooled air which can circulate in the closed loop.
  • a cooling gas circulation means such as a fan is provided to circulate the cooling gas.
  • the cooling gas can flow to an entry to the second flow path being proximal to the front wall of the goods department, then flow through the second flow path and then from an exit of the second flow path back to its entry, optionally via the cooling gas circulating means.
  • a fan can be provided underneath the bottom wall of the goods compartment propelling a common cooling gas flow. Subsequently, this common cooling gas flow is divided into the first flow producing the cooling gas curtain from the front wall to the rear wall of the goods compartment and the second flow flowing through the channel positioned adjacent to the side wall of the goods compartment.
  • two separate cooling circulation means can be provided for the first and the second flow path, respectively.
  • a cooling means such as a heat exchanger is provided within the closed loop. Cooling gas for the first and/or second flow path can be cooled by passing it through the cooling means.
  • the cooling means is located within the top opening freezer, but can also be provided remotely thereof.
  • the cooling gas flowing in the second flow path serves for cooling the adjacent side wall. Thereby, the heat entry across the side wall to the goods compartment can be reduced significantly.
  • the channel of the second flow path is defined by one of the respective side walls and the outer casing.
  • walls defining the channel of the second flow path can be constituted by a side wall and a wall of the outer casing.
  • the cooling gas can enter the space between the side wall and the outer casing proximal to a front wall side, then flow through the space between the side wall and the outer casing and then exit at the opposite rear wall side. No additional tubing needs to be provided between the side walls of the goods department and the outer casing.
  • the second flow path is arranged such that cooling gas flows from a front wall side of the goods compartment across the entire side wall surface to a rear wall side of the goods compartment.
  • the side wall can be cooled along its entire length.
  • the channel of the second flow path is positioned laterally adjacent to an upper edge of the side wall of the goods compartment.
  • the side wall is especially cooled in a region adjacent to the top-opening where heat losses occur due to turbulences in the cooling gas curtain.
  • the channel of the second flow path includes one or more flow connections to the goods compartment.
  • cooling gas can flow from the second flow path into the goods compartment thereby providing improved cooling of the goods compartment especially in a region close to the side walls.
  • the flow connections can be provided by holes or cut-outs in the side wall of the goods compartment. These holes or cut-outs can have any geometry allowing a gas flow between the cooling channel and the goods compartment.
  • the second flow path is closed at its rear wall side such that the entire gas flow is forced through the flow connections into the goods compatment.
  • the holes or cut-outs can be made larger in regions where additional cooling is especially desired, such as at a region proximal to the rear wall, compared to other regions such that more cooling gas enters at these regions.
  • the second flow path can be divided into a first continuous flow portion extending from a front wall side of the goods compartment to a rear wall side and a second flow portion having flow connections to the goods compartment.
  • the first flow portion serves for better isolating the goods compartment against the surrounding environment of the top-opening freezer while the second flow portion improves the cooling within the goods compartment within the region close to the side walls.
  • the first and second flow portions can be separated e.g. by a guide vane.
  • the flow connections can be arranged at the filling limit of the goods compartment. That means that the openings for introducing cooling gas from the channel of the second flow path to the goods compartment are approximately arranged in a height of the side wall up to which the goods compartment is to be filled at maximum with goods to be stored therein. By such arrangements, the goods closest to the cooling gas curtain are especially cooled.
  • the flow connections are preferably arranged at a portion of the side wall proximal to the rear wall. Accordingly, cooling gas can specifically be introduced into the goods compartment in a region downstream of the middle of the first flow path, i.e. the middle of the cooling gas curtain. Thereby, especially the region closer to the opening in the rear wall for returning the cooling gas of the first flow back to cooling gas circulation means, i.e., the region where the cooling gas curtain is warmest and most disturbed, can be additionally cooled.
  • a top-opening freezer 1 includes an outer casing 3 and a goods compartment 5 disposed within the outer casing 3 and having a bottom wall 7, a front wall 9, a rear wall 11 and a top-opening 13.
  • a cooling gas circulating and cooling means 15 like e.g. a fan coupled with a heat exchanger.
  • the fan propels cooling gas for flowing round a cooling gas circuit.
  • the cooling gas first flows through a space between the bottom wall 7 and front wall 9 of the goods compartment and the outer casing 3.
  • cooling gas exits through an opening 17 in an upper portion of the front wall 9.
  • the cooling gas flows along the top opening 13 of the goods compartment 5 thereby forming a cooling gas curtain.
  • the cooling gas enters an opening 19 in an opposite upper portion of the rear wall 11 and flows back to the cooling gas circulating and cooling means 15 through the space between the rear wall 11 and bottom wall 7 of the goods compartment 5 and the outer casing 3.
  • the illustrated top-opening freezer 1 further includes a heat exchanger (not shown) positioned within the cooling gas circuit and connected to a cooling unit (not shown) included in a lower part 21 of the top-opening freezer 1.
  • FIG. 2 illustrates a conventional top-opening freezer wherein a cooling gas curtain 23 (indicated as arrows) is flowing from a front wall 9, across the top-opening 13 to a rear rear wall 11 of the goods compartment 5.
  • the side walls 25, 27 of the goods compartment 5 are not specifically cooled.
  • Figure 3 shows an embodiment of the top-opening freezer according to an embodiment of the invention.
  • additional second flow paths are provided in a space between the side walls 25, 27 and the outer casing 3, respectively.
  • the two second flow paths are provided with a first flow portion 33, 35, respectively, extending from a front wall 9 side of the goods compartment 5 to a rear wall 11 side, and second flow portions 37, 39, respectively, having flow connections 38 to the goods compartment 5.
  • a part of the cooling gas flows from a front side along the first flow portions 33. 35 to the rear side thereby cooling the side walls.
  • Another part of the cooling gas flows through the second flow portions 37, 39 from the front side through the flow connections 38 into the goods compartment 5 thereby cooling the regions of the goods compartment 5 close to the side walls 25, 27.
  • the cooling gas returning from the rear wall side 11 flows linearly along the surface underneath the bottom wall and through a unit 41, comprising a fan and a heat exchanger extending almost along the entire width of the bottom wall before again flowing to the front wall 9.
  • a unit 41 comprising a fan and a heat exchanger extending almost along the entire width of the bottom wall before again flowing to the front wall 9.
  • the cooling gas coming from the fan/evaporator unit 41 is divided by a guide vane 43 into two separate streams. The middle stream continues to form the cooling gas curtain whereas the border region streams are diverted into the direction of the second flow path in the side walls 25, 27.

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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
EP09179831A 2006-07-28 2006-07-28 Top-opening freezer with improved cooling gas flow Not-in-force EP2166296B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09179831T PL2166296T3 (pl) 2006-07-28 2006-07-28 Zamrażarka otwierana od góry, z udoskonalonym przepływem gazu chłodzącego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06762884A EP2047190B1 (en) 2006-07-28 2006-07-28 Top-opening freezer with improved cooling gas flow
PCT/EP2006/007503 WO2008011906A1 (en) 2006-07-28 2006-07-28 Top-opening freezer with improved cooling gas flow

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP06762884.2 Division 2006-07-28

Publications (2)

Publication Number Publication Date
EP2166296A1 EP2166296A1 (en) 2010-03-24
EP2166296B1 true EP2166296B1 (en) 2011-11-16

Family

ID=38180401

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09179831A Not-in-force EP2166296B1 (en) 2006-07-28 2006-07-28 Top-opening freezer with improved cooling gas flow
EP06762884A Ceased EP2047190B1 (en) 2006-07-28 2006-07-28 Top-opening freezer with improved cooling gas flow

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP06762884A Ceased EP2047190B1 (en) 2006-07-28 2006-07-28 Top-opening freezer with improved cooling gas flow

Country Status (8)

Country Link
US (1) US20100031692A1 (pl)
EP (2) EP2166296B1 (pl)
CN (1) CN101501426B (pl)
AT (1) ATE534005T1 (pl)
DE (1) DE602006017749D1 (pl)
PL (1) PL2166296T3 (pl)
TW (1) TW200821519A (pl)
WO (1) WO2008011906A1 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6308662B2 (ja) * 2014-05-12 2018-04-11 福島工業株式会社 ２温度式のショーケース
CN106123429A (zh) * 2016-06-24 2016-11-16 安徽维烨制冷设备有限公司 一种顶置制冷式冷藏柜
JP6547764B2 (ja) * 2017-01-11 2019-07-24 トヨタ自動車株式会社 車両用燃料電池システム及びその制御方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55152371A (en) * 1979-05-15 1980-11-27 Fuji Electric Co Ltd Flat wall type frozen*refrigerated open display case
US4399662A (en) * 1980-05-01 1983-08-23 Tyler Refrigeration Corporation Island refrigerated display case with air defrost
US5442932A (en) * 1993-06-21 1995-08-22 Seco Products Corporation Open topped, air curtain closed cooler chest
CN2357288Y (zh) * 1998-12-09 2000-01-05 高世乐 一种新型冷冻冷藏商品展销柜
JP2004045018A (ja) * 2002-05-22 2004-02-12 Sanden Corp オープンショーケース

Also Published As

Publication number Publication date
ATE534005T1 (de) 2011-12-15
EP2047190B1 (en) 2010-10-20
DE602006017749D1 (de) 2010-12-02
TW200821519A (en) 2008-05-16
WO2008011906A1 (en) 2008-01-31
CN101501426A (zh) 2009-08-05
CN101501426B (zh) 2010-09-22
HK1134128A1 (en) 2010-04-16
PL2166296T3 (pl) 2012-04-30
US20100031692A1 (en) 2010-02-11
EP2047190A1 (en) 2009-04-15
EP2166296A1 (en) 2010-03-24

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