EP2047190B1 - Von oben zu öffnender gefrierschrank mit verbessertem kühlgasstrom - Google Patents

Von oben zu öffnender gefrierschrank mit verbessertem kühlgasstrom Download PDF

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Publication number
EP2047190B1
EP2047190B1 EP06762884A EP06762884A EP2047190B1 EP 2047190 B1 EP2047190 B1 EP 2047190B1 EP 06762884 A EP06762884 A EP 06762884A EP 06762884 A EP06762884 A EP 06762884A EP 2047190 B1 EP2047190 B1 EP 2047190B1
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.)
Expired - Fee Related
Application number
EP06762884A
Other languages
English (en)
French (fr)
Other versions
EP2047190A1 (de
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 EP09179831A priority Critical patent/EP2166296B1/de
Priority to PL09179831T priority patent/PL2166296T3/pl
Priority to AT09179831T priority patent/ATE534005T1/de
Publication of EP2047190A1 publication Critical patent/EP2047190A1/de
Application granted granted Critical
Publication of EP2047190B1 publication Critical patent/EP2047190B1/de
Expired - Fee Related 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 according to the preamble of claim 1.
  • a freezer is known, for example, from DE-A- 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.
  • the top-opening freezer according to the present invention is defined in claim 1.
  • 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 are 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 flow connections to the goods compartment. Through these flow connections 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. By using special geometries for the flow connections or the holes the flow of cooling gas into the goods compartment can be enhanced, thereby providing even better cooling.
  • 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 7 and through a unit 41, comprising a fan and a heat exchanger extending almost along the entire width of the bottom wall 7 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 7 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.

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  • 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)

Claims (11)

  1. Tiefkühlgerät (1) mit Öffnung an der Oberseite, aufweisend:
    ein Außengehäuse (3);
    einen in dem Außengehäuse (3) angeordneten Warenraum (5) mit einer Bodenwand (7), einer vorderen Wand (9), einer hinteren Wand (11), zwei Seitenwänden (25, 27) und einer oberen Öffnung (13);
    wobei ein erster Strömungsweg derart vorgesehen ist, dass Kühlgas von einer Öffnung (17) in einem oberen Bereich auf der Seite der vorderen Wand (9) des Warenraums zu einer Öffnung (19) in einem oberen Bereich auf der Seite der gegenüberliegenden hinteren Wand (11) des Warenraums geführt wird, um dadurch einen Kühlgasvorhang über die obere Öffnung (13) zu schaffen;
    wobei eine Seitenwand-Kühleinrichtung zum Kühlen von mindestens einer Seitenwand des Warenraums zwischen einer Seitenwand (25, 27) des Warenraums (5) und dem Außengehäuse (3) angeordnet ist, wobei die Seitenwand-Kühleinrichtung mindestens einen Kanal (29, 31) für einen zweiten Strömungsweg (39) aufweist, der derart vorgesehen ist, dass Kühlgas in den mindestens einen Kanal (29, 31) geleitet wird,
    dadurch gekennzeichnet, dass der Kanal (29, 31) des zweiten Strömungsweges (39) Strömungsverbindungen (38) zu dem Warenraum (5) aufweist.
  2. Tiefkühlgerät nach Anspruch 1,
    wobei der Kanal (29, 31) des zweiten Strömungsweges (39) durch eine jeweilige Seitenwand (25, 27) des Warenraums (5) und des Außengehäuses (3) gebildet ist.
  3. Tiefkühlgerät nach Anspruch 1 oder 2,
    wobei der Kanal (29, 31) des zweiten Strömungsweges (39) sich von einer Seite an der vorderen Wand (9) des Warenraums (5) zu einer Seite an der hinteren Wand (11) des Warenraums (5) erstreckt.
  4. Tiefkühlgerät nach einem der Ansprüche 1 bis 3,
    wobei der Kanal (29, 31) des zweiten Strömungsweges (39) seitlich neben einem oberen Rand der einen Seitenwand (29, 31) des Warenraums (5) angeordnet ist.
  5. Tiefkühlgerät nach einem der Ansprüche 1 bis 4,
    wobei die Strömungsverbindungen (38) durch Öffnungen in der einen Seitenwand (25, 27) des Warenraums (5) gebildet sind.
  6. Tiefkühlgerät nach einem der Ansprüche 1 bis 5,
    wobei der zweite Strömungsweg ferner erste Strömungsbereiche (33, 35) aufweist, die sich von einer Seite an der vorderen Wand (9) des Warenraums (5) zu einer Seite an der hinteren Wand (11) des Warenraums (5) erstrecken.
  7. Tiefkühlgerät nach Anspruch 6,
    wobei der zweite Strömungsweg in einen ersten Strömungsbereich (33, 35), der sich von einer Seite an der vorderen Wand (9) des Warenraums (5) zu einer Seite an der hinteren Wand (11) des Warenraums (5) erstreckt, und einen zweiten Strömungsbereich (39) unterteilt ist, der Strömungsverbindungen (38) zu dem Warenraum (5) aufweist.
  8. Tiefkühlgerät nach einem der Ansprüche 1 bis 7,
    wobei die Strömungsverbindungen (38) an einer Füllgrenze des Warenraums (5) angeordnet sind.
  9. Tiefkühlgerät nach einem der Ansprüche 1 bis 8,
    wobei die Strömungsverbindungen (38) in einem Bereich der einen Seitenwand (25, 27) in der Nähe der hinteren Wand (11) angeordnet sind.
  10. Tiefkühlgerät nach einem der Ansprüche 1 bis 9,
    weiterhin aufweisend eine Kühlgas-Zirkulationseinrichtung (15) zum Zirkulieren eines Kühlgases durch mindestens einen von dem ersten und dem zweiten Strömungsweg (33, 35; 39).
  11. Tiefkühlgerät nach Anspruch 10,
    wobei eine von der Kühlgas-Zirkulationseinrichtung (15) kommende Gasströmung mittels einer Leitplatte (43) auf den ersten und den zweiten Strömungsweg aufgeteilt wird.
EP06762884A 2006-07-28 2006-07-28 Von oben zu öffnender gefrierschrank mit verbessertem kühlgasstrom Expired - Fee Related EP2047190B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP09179831A EP2166296B1 (de) 2006-07-28 2006-07-28 Gefriertruhe mit verbessertem Kühlgasstrom
PL09179831T PL2166296T3 (pl) 2006-07-28 2006-07-28 Zamrażarka otwierana od góry, z udoskonalonym przepływem gazu chłodzącego
AT09179831T ATE534005T1 (de) 2006-07-28 2006-07-28 Gefriertruhe mit verbessertem kühlgasstrom

Applications Claiming Priority (1)

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

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP09179831.4 Division-Into 2009-12-18

Publications (2)

Publication Number Publication Date
EP2047190A1 EP2047190A1 (de) 2009-04-15
EP2047190B1 true EP2047190B1 (de) 2010-10-20

Family

ID=38180401

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09179831A Not-in-force EP2166296B1 (de) 2006-07-28 2006-07-28 Gefriertruhe mit verbessertem Kühlgasstrom
EP06762884A Expired - Fee Related EP2047190B1 (de) 2006-07-28 2006-07-28 Von oben zu öffnender gefrierschrank mit verbessertem kühlgasstrom

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09179831A Not-in-force EP2166296B1 (de) 2006-07-28 2006-07-28 Gefriertruhe mit verbessertem Kühlgasstrom

Country Status (9)

Country Link
US (1) US20100031692A1 (de)
EP (2) EP2166296B1 (de)
CN (1) CN101501426B (de)
AT (1) ATE534005T1 (de)
DE (1) DE602006017749D1 (de)
HK (1) HK1134128A1 (de)
PL (1) PL2166296T3 (de)
TW (1) TW200821519A (de)
WO (1) WO2008011906A1 (de)

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
EP2166296A1 (de) 2010-03-24
ATE534005T1 (de) 2011-12-15
EP2047190A1 (de) 2009-04-15
PL2166296T3 (pl) 2012-04-30
HK1134128A1 (en) 2010-04-16
WO2008011906A1 (en) 2008-01-31
DE602006017749D1 (de) 2010-12-02
EP2166296B1 (de) 2011-11-16
US20100031692A1 (en) 2010-02-11
TW200821519A (en) 2008-05-16
CN101501426B (zh) 2010-09-22
CN101501426A (zh) 2009-08-05

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