EP0600845A2 - Freezer display cabinet with a vertical air curtain - Google Patents
Freezer display cabinet with a vertical air curtain Download PDFInfo
- Publication number
- EP0600845A2 EP0600845A2 EP93850207A EP93850207A EP0600845A2 EP 0600845 A2 EP0600845 A2 EP 0600845A2 EP 93850207 A EP93850207 A EP 93850207A EP 93850207 A EP93850207 A EP 93850207A EP 0600845 A2 EP0600845 A2 EP 0600845A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- duct
- cooling element
- fan
- goods
- 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.)
- Ceased
Links
Images
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
- 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 invention refers to a freezer display cabinet showing a substantially vertical rear wall, a plurality of shelves for storing goods at freezing temperature arranged above each other along the wall, a first air duct extending from a first place at the front edge of the lowest shelf, in substantially horizontal direction under the lowest shelf, in substantially vertical direction behind the rear wall and in substantially horizontal direction above the uppermost shelf to a second place above the front edge of the uppermost shelf, a first fan to circulate air through the duct to the second place, from where the air moves downwards i an air curtain outside the front edges of the shelves to the first place and a cooling element to cool the air circulating through the duct to freezing temperature, the cooling element being defrosted by the fan circulating heated air through the duct.
- the object of the invention is to improve the known cabinet such, that this temperature difference of goods at different places in the cabinet decreases.
- This object is attained in the freezer display cabinet according to the invention by openings in the rear wall to bring about air flows from the first air duct through the spaces formed between the shelves and by means for shutting off the air flows, when the cooling element is defrosted.
- the goods will also be flowed through by cooling air, whereby the heat transfer from the goods to the cooling air being improved resulting in that the temperature difference between goods on different places in the cabinet decreases.
- the air flows are shut off during the defrosting of the cooling element in order that the humid defrosting air, which then appears, shall not flow through the frozen goods and form frost on them.
- By 10 is designated a freezer display cabinet with spaces 12, in which goods, which are stored at freezing temperature (about -18°C) on shelves 14, are available through a vertical access opening 16.
- the spaces 12 are surrounded by a duct 18, im which a fan 20 and a cooling element 22 are located.
- the fan 20 circulates air through the duct 18 from a first place 24 at the lower front edge of the lowest space 12 through the cooling element 22, which cools the air, to a second place 25 at the upper front edge of the uppermost space 12, from where the air moves downwards in front of the spaces 12 in an air curtain 26, which cools the goods, to the first place 24.
- the goods are also cooled by air, which has been cooled by the cooling element 22 and after that is sucked by a fan 28 into a duct 30 arranged behind a rear wall 32 of the spaces 12, from which duct 30 the fan 28 brings the air to flow through openings 34 in the rear wall 32, from where the air passes between the goods in substantially horizontal direction and after that is united to the air curtain 26.
- the air curtain 26 is heated by the surroundings of the cabinet during its movement from the second place 25 to the first place 24, goods in spaces 12 located at a lower level thereby becoming less cooled by the air curtain 26 than goods in spaces 12 located at a higher level.
- This poorer cooling is compensated thereby that one lets the air flows through the openings 34 become larger through spaces 12 located at a lower level, e.g. thereby that one arranges more openings 34 here, than through spaces 12 located at higher levels.
- a signal is given to a means 36, which puts the cooling element 22 out of operation, activates a heating element 38 and stops the fan 28.
- the fan 20 continues at this to circulate air, which now is heated by the element 38, through the duct 18, the cooling element 22 and the curtain 26.
- the humid defrosting air which now is circulated by the fan 20, is prevented from flowing via the openings 34 through the goods and form frost on them.
- Throttle valves which are not shown, can also be arranged to break the communication between the ducts 18 and 30 during the defrosting period.
- fans 40 circulate uncooled air in one or more further air curtains 42 outside the curtain 26.
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Defrosting Systems (AREA)
- Freezers Or Refrigerated Showcases (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
Description
- The invention refers to a freezer display cabinet showing a substantially vertical rear wall, a plurality of shelves for storing goods at freezing temperature arranged above each other along the wall, a first air duct extending from a first place at the front edge of the lowest shelf, in substantially horizontal direction under the lowest shelf, in substantially vertical direction behind the rear wall and in substantially horizontal direction above the uppermost shelf to a second place above the front edge of the uppermost shelf, a first fan to circulate air through the duct to the second place, from where the air moves downwards i an air curtain outside the front edges of the shelves to the first place and a cooling element to cool the air circulating through the duct to freezing temperature, the cooling element being defrosted by the fan circulating heated air through the duct.
- In a known such freezer display cabinet, where the goods should be kept at a temperature of about -18°C, the goods become, as a consequence of the air curtain being heated by the surroundings of the cabinet during its movement from the first to the second place, warmer the lower down they are located in the cabinet.
- The object of the invention is to improve the known cabinet such, that this temperature difference of goods at different places in the cabinet decreases.
- This object is attained in the freezer display cabinet according to the invention by openings in the rear wall to bring about air flows from the first air duct through the spaces formed between the shelves and by means for shutting off the air flows, when the cooling element is defrosted.
- By said air flows the goods will also be flowed through by cooling air, whereby the heat transfer from the goods to the cooling air being improved resulting in that the temperature difference between goods on different places in the cabinet decreases. The air flows are shut off during the defrosting of the cooling element in order that the humid defrosting air, which then appears, shall not flow through the frozen goods and form frost on them.
- An embodiment of a freezer display cabinet according to the invention is described below in connection with the figure of the attached drawing.
- By 10 is designated a freezer display cabinet with
spaces 12, in which goods, which are stored at freezing temperature (about -18°C) onshelves 14, are available through a vertical access opening 16. Thespaces 12 are surrounded by aduct 18, im which afan 20 and acooling element 22 are located. Thefan 20 circulates air through theduct 18 from afirst place 24 at the lower front edge of thelowest space 12 through thecooling element 22, which cools the air, to asecond place 25 at the upper front edge of theuppermost space 12, from where the air moves downwards in front of thespaces 12 in anair curtain 26, which cools the goods, to thefirst place 24. The goods are also cooled by air, which has been cooled by thecooling element 22 and after that is sucked by afan 28 into aduct 30 arranged behind arear wall 32 of thespaces 12, from whichduct 30 thefan 28 brings the air to flow throughopenings 34 in therear wall 32, from where the air passes between the goods in substantially horizontal direction and after that is united to theair curtain 26. - The
air curtain 26 is heated by the surroundings of the cabinet during its movement from thesecond place 25 to thefirst place 24, goods inspaces 12 located at a lower level thereby becoming less cooled by theair curtain 26 than goods inspaces 12 located at a higher level. This poorer cooling is compensated thereby that one lets the air flows through theopenings 34 become larger throughspaces 12 located at a lower level, e.g. thereby that one arrangesmore openings 34 here, than throughspaces 12 located at higher levels. - When the
cooling element 22 shall be defrosted a signal is given to ameans 36, which puts thecooling element 22 out of operation, activates aheating element 38 and stops thefan 28. Thefan 20 continues at this to circulate air, which now is heated by theelement 38, through theduct 18, thecooling element 22 and thecurtain 26. By thefan 28 now standing still, the humid defrosting air, which now is circulated by thefan 20, is prevented from flowing via theopenings 34 through the goods and form frost on them. Throttle valves, which are not shown, can also be arranged to break the communication between theducts - To lower the energy consumption of the cabinet one can in a way known per se by
fans 40 circulate uncooled air in one or morefurther air curtains 42 outside thecurtain 26.
Claims (3)
- Freezer display cabinet (10) showing a substantially vertical rear wall (32), a plurality of shelves (14) for storing goods at freezing temperature arranged above each other along the wall, a first air duct (18) extending from a first place (24) at the front edge of the lowest shelf, in substantially horizontal direction under the lowest shelf, in substantially vertical direction behind the rear wall (32) and in substantially horizontal direction above the uppermost shelf to a second place (25) above the front edge of the uppermost shelf, a first fan (20) to circulate air through the duct (18) to the second place (25), from where the air moves downwards i an air curtain (26) outside the front edges of the shelves to the first place (24) and a cooling element (22) to cool the air circulating through the duct to freezing temperature, the cooling element (22) being defrosted by the fan (20) circulating heated air through the duct, characterized by openings (34) in the rear wall (32) to bring about air flows from the first air duct (18) through the spaces (12) formed between the shelves (14), and means (36) for shutting off said air flows, when the cooling element (22) is defrosted.
- Feezer display cabinet according to claim 1, characterized in, that the openings (34) are such, that the air flows become larger through spaces located at a lower level than through spaces located at a higher level.
- Freezer display cabinet according to claim 1 or 2, characterized in, that the openings (34) communicate with the air duct (18) via a second air duct (30), that a second fan (28) is arranged in the second air duct (30) for bringing about said air flows and that said means (36) shuts off the second fan (28), when the cooling element (22) is defrosted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9203595A SE505561C2 (en) | 1992-11-30 | 1992-11-30 | Freezer with shelves arranged above each other and with means for defrosting its cooling element |
SE9203595 | 1992-11-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0600845A2 true EP0600845A2 (en) | 1994-06-08 |
EP0600845A3 EP0600845A3 (en) | 1997-05-21 |
Family
ID=20387974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93850207A Ceased EP0600845A3 (en) | 1992-11-30 | 1993-11-02 | Freezer display cabinet with a vertical air curtain. |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0600845A3 (en) |
SE (1) | SE505561C2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2787979A1 (en) | 1998-12-31 | 2000-07-07 | Abc Synergie | Refrigerated cabinet or counter for displaying foodstuff under room temperature has bulkhead in casing defining two air systems, one only in thermal contact with evaporator of refrigerating unit |
EP1629750A1 (en) * | 2004-08-24 | 2006-03-01 | Hussmann Corporation | Refrigerated merchandiser with fan-powered rear discharge |
RU2650401C2 (en) * | 2013-05-10 | 2018-04-11 | Эплайд Дизайн Энд Инжиниринг Лтд | Refrigerated display appliances |
US10314411B2 (en) | 2016-05-25 | 2019-06-11 | Hussmann Corporation | Refrigerated merchandiser with airflow support system |
KR102563935B1 (en) * | 2023-06-16 | 2023-08-07 | 주식회사 밤일마을제주흑돈 | Showcase for cold storage |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1282235A (en) * | 1960-12-27 | 1962-01-19 | Hussmann Refrigerator Co | Low temperature refrigerated display case and method for refrigerating an area where products are stored down to a low temperature |
GB2163244A (en) * | 1984-08-13 | 1986-02-19 | Sanden Corp | Refrigerated display cabinet |
GB2231947A (en) * | 1989-05-18 | 1990-11-28 | Clares Equip Ltd | Improvements related to refrigerated display units |
GB2247741A (en) * | 1990-09-04 | 1992-03-11 | Craig Nicol Ltd | Refrigerated food cabinet |
-
1992
- 1992-11-30 SE SE9203595A patent/SE505561C2/en not_active IP Right Cessation
-
1993
- 1993-11-02 EP EP93850207A patent/EP0600845A3/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1282235A (en) * | 1960-12-27 | 1962-01-19 | Hussmann Refrigerator Co | Low temperature refrigerated display case and method for refrigerating an area where products are stored down to a low temperature |
GB2163244A (en) * | 1984-08-13 | 1986-02-19 | Sanden Corp | Refrigerated display cabinet |
GB2231947A (en) * | 1989-05-18 | 1990-11-28 | Clares Equip Ltd | Improvements related to refrigerated display units |
GB2247741A (en) * | 1990-09-04 | 1992-03-11 | Craig Nicol Ltd | Refrigerated food cabinet |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2787979A1 (en) | 1998-12-31 | 2000-07-07 | Abc Synergie | Refrigerated cabinet or counter for displaying foodstuff under room temperature has bulkhead in casing defining two air systems, one only in thermal contact with evaporator of refrigerating unit |
EP1629750A1 (en) * | 2004-08-24 | 2006-03-01 | Hussmann Corporation | Refrigerated merchandiser with fan-powered rear discharge |
US7062932B2 (en) | 2004-08-24 | 2006-06-20 | Hussmann Corporation | Refrigerated merchandiser with fan-powered rear discharge |
RU2650401C2 (en) * | 2013-05-10 | 2018-04-11 | Эплайд Дизайн Энд Инжиниринг Лтд | Refrigerated display appliances |
US10314411B2 (en) | 2016-05-25 | 2019-06-11 | Hussmann Corporation | Refrigerated merchandiser with airflow support system |
KR102563935B1 (en) * | 2023-06-16 | 2023-08-07 | 주식회사 밤일마을제주흑돈 | Showcase for cold storage |
Also Published As
Publication number | Publication date |
---|---|
SE9203595L (en) | 1994-05-31 |
EP0600845A3 (en) | 1997-05-21 |
SE505561C2 (en) | 1997-09-15 |
SE9203595D0 (en) | 1992-11-30 |
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