WO2006087009A1 - Refridgerated display chest - Google Patents

Refridgerated display chest Download PDF

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Publication number
WO2006087009A1
WO2006087009A1 PCT/EP2005/001725 EP2005001725W WO2006087009A1 WO 2006087009 A1 WO2006087009 A1 WO 2006087009A1 EP 2005001725 W EP2005001725 W EP 2005001725W WO 2006087009 A1 WO2006087009 A1 WO 2006087009A1
Authority
WO
WIPO (PCT)
Prior art keywords
chest
refrigerated
venting
refrigerated display
display
Prior art date
Application number
PCT/EP2005/001725
Other languages
French (fr)
Inventor
Thomas Krieger
Bernhard Möller
Dimitri Keller
Markus Schuster
Ines Spettmann
Stefan Strupp
Stefan Ullrich
Olivier Merker
Original Assignee
Carrier Corporation
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 Corporation filed Critical Carrier Corporation
Priority to PCT/EP2005/001725 priority Critical patent/WO2006087009A1/en
Priority to EP05728735.1A priority patent/EP1853139B1/en
Publication of WO2006087009A1 publication Critical patent/WO2006087009A1/en

Links

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
    • 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
    • F25D2323/00—General constructional features not provided for in other groups of this subclass
    • F25D2323/002—Details for cooling refrigerating machinery
    • F25D2323/0028—Details for cooling refrigerating machinery characterised by the fans
    • F25D2323/00283—Details for cooling refrigerating machinery characterised by the fans the fans allowing rotation in reverse direction

Definitions

  • Fig. 1 shows a first embodiment of a refrigerated display chest according to the present invention
  • Fig. 3 shows a third embodiment of a refrigerated display chest of the invention having a single cooler 3 and at least one fan 4.
  • the fan or fans 4 is/are operated with alternating blowing direction.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The invention relates to a refrigerated display chest (1) comprising a display platform (2) supporting the goods to be refrigerated, a cooler (3a, 3b) and means for venting (4) an air flow,wherein the means for venting (4) are adapted to change the flow direction of the air flow during operation of the refrigerated display chest (1).

Description

REFRIGERATED DISPLAY CHEST
The present invention relates to a refrigerated display chest comprising a display platform supporting the goods to be refrigerated and displayed, a cooler and means for venting an air flow. The cooler may be an evaporator.
Refrigerated display chests comprise means for cooling air and means for venting an air flow. The cooled air flow is directed into the display area where the goods to be refrigerated are supported by a display platform. The space above the display platform supporting the goods to be refrigerated is called the display area. Two operational principles are known for directing the flow of the cooling air. According to the first principle, an inlet for cooled air into the display area is provided at one side of the refrigerated display chest and an outlet is provided at the opposite side. According to the second principle, an inlet for cooled air into the display area is provided in the middle of the refrigerated display chest and outlets are provided at two sides located opposite to each other. Both principles have in common that the flow direction of the cooled air remains the same for the whole operation time of the refrigerated display case, i. e. as long as goods are refrigerated.
The present invention is provoked by the cognition that the temperature distribution in such a refrigerated display chest is to a certain extent inhomogeneous, because of the cooling air is becoming warmer on its way from the inlet to the outlet. Especially for open-top refrigerated display chests the average difference in the
temperature of goods between the coldest area at the air inlet side and the warmest area at the air outlet side in the display area is about 6 °K.
Thus, it is an object of the present invention to provide a refrigerated display chest with a more homogeneous temperature distribution.
To meet said object, the invention provides a refrigerated display chest comprising a display platform supporting the goods to be refrigerated, means for cooling and means for venting an air flow, wherein the means for venting are adapted to change the air flow direction during operation of the refrigerated display chest.
Therefore, the former coldest and warmest areas do no longer occur. The change of flow direction prevents the build up of such areas and an in essence homogeneous temperature distribution can be achieved. As a result, in case of a refrigerated display chest of the present invention, the area which was the warmest in conventional refrigerated display chests has a lower average temperature than in the prior art.
In accordance with an embodiment of the present invention at least one of the means for cooling and the means for venting an air flow are located underneath the display platform. This is especially useful to create a balanced flow of the cooled air along the sides of the refrigerated display case. In addition, in essence the whole length and width of the refrigerated display chest can be used as display area without any cooling means obstructing.
In accordance with an embodiment of the present invention the means for venting comprise a fan with a blowing side and a suction side, which is designed to change its direction of rotation which means that the blowing side and the suction side alternate. Therefore, the flow direction alternates. Depending on the frequency of the alternation of the flow direction, a substantially homogeneous temperature distribution is achieved.
In accordance with an embodiment of the present invention the means for venting comprise at least two fans being operated alternately, with the blowing direction of one of the fans being opposite to the blowing direction of the other one of the fans. As the two fans are operated alternately, the resulting blowing direction, and in turn the air flow direction, alternate correspondingly.
In accordance with an embodiment of the present invention the cooling means or cooler comprises at least two cooling elements. For example evaporators are used as cooling elements, e.g. evaporators, which may have fins the air to be cooled flows through.
In accordance with an embodiment of the present invention there are provided two cooling elements, one cooling element is arranged on one side and the other cooling element is arranged on the other side of the means for venting, e.g. a fan. This arrangement is especially useful to make sure there is no snow build up at the outlet of the cooling air, where the cooling air leaves the display area. In the prior art devices like air baffles or air flow distributors are used at the blowing side of the fan to improve the distribution of the cooled air. The same devices are not useful at the suction side of the fan where the cooling air is sucked in again after having cooled the displayed goods, because of the possibility of the aforementioned build up of snow which could occur due to the cooling air being almost saturated with moisture at this point. According to the present invention both sides have to be able to function as blowing side and as suction side. To improve the distribution of the cooled air without the risk of snow build up a cooling element is provided at each side of the fan. Each cooling element for example comprises an evaporator with fins suitable to be located at either side. The fins improve the distribution of the cooled air at the blowing side, but do not cause any build up of snow at the suction side.
Embodiments of the present invention are described below with reference to 90 Figures wherein:
Fig. 1 shows a first embodiment of a refrigerated display chest according to the present invention;
95
Fig. 2 shows a second embodiment of a refrigerated display chest according to the present invention;
Fig. 3 shows a third embodiment of a refrigerated display chest according to the loo present invention;
Fig. 1 shows a first embodiment of a refrigerated display chest 1 according to the invention, comprising a display platform 2 supporting the goods to be refrigerated,
105 cooling means (3 a, 3b) and means for venting (4) an air flow which is a fan 4 in the embodiment shown in the Figure. In the embodiment shown in the Figure, the cooling means are embodied as two cooling elements 3 a, 3b each being located at a different side of the fan 4. Adjacent to side walls 5 of the refrigerated display chest 1, there are arranged air channels 6 each having a lower inlet/outlet 7 located no adjacent to one of the cooling elements 3a and 3b, and an upper inlet/outlet 8 for blowing/sucking the air to/from the display area above the display platform 2.
The means for venting (4) are designed to be able to change the air flow direction during operation of the refrigerated display chest 1. In the embodiment using a fan 115 4, the fan 4 changes its direction of rotation every few minutes, for example. This means that the blowing side and the suction side alternate. With the air flow direction alternating every few minutes a quite homogeneous temperature distribution over the display area is achieved.
120 In Fig. 1, one air flow direction is indicated by black arrows, the other air flow direction is indicated by white arrows.
Fig. 2 shows a second embodiment of a refrigerated display chest of the invention having venting means in the form of two fans 4b each arranged in a different air
125 flow channel 10a and 10b, respectively, to each of the fans 4a and 4b is associated one cooler 3a and 3b, respectively, arranged in the same channel as the associated fan 4a and 4b, respectively. The fans 4a and 4b are operated alternately so that only one of the fans 4a and 4b is operated at a time. The fans 4a and 4b have different blowing directions so that there result alternating air flows through channel 10a and
130 channel 10b resulting in alternating air flow direction above the display platform 2.
Fig. 3 shows a third embodiment of a refrigerated display chest of the invention having a single cooler 3 and at least one fan 4. The fan or fans 4 is/are operated with alternating blowing direction.

Claims

CLAMS145
1. Refrigerated display chest (1) comprising a display platform (2) supporting the goods to be refrigerated, a cooler (3a, 3b) and means for venting (4) an air flow, wherein the means for venting (4) are adapted to change the flow direction of the
150 air flow during operation of the refrigerated display chest (1). ,
2. Refrigerated display chest (1) according to claim 1 wherein the cooler (3a, 3b) is located underneath the display platform (2).
155 3. Refrigerated display chest (1) according to claim 1 or 2 wherein the means for venting (4) an air flow are located underneath the display platform (2).
4. Refrigerated display chest (1) according to any of claims 1 to 3 wherein the means for venting (4) comprise a fan having a blowing side and a suction side
160 which depend on the direction of rotation of the fan, the fan being adapted to be controlled to change its direction of rotation so that the blowing side and the suction side alternate.
5. Refrigerated display chest (1) according to any of claims 1 to 3 wherein the 165 means for venting (4) comprise at least two fans adapted to be operated alternately, the fans being adapted to have opposite blowing directions.
6. Refrigerated display chest (1) according to any of claims 1 to 5 wherein the cooler (3a, 3b) comprises at least two cooling elements (3a, 3b).
7. Refrigerated display chest (1) according to claim 6 having two cooling elements (3a, 3b) wherein on each side of the means for venting (4), one of the cooling elements (3a, 3b) is provided.
175 8. Refrigerated display chest (1) according to any of claims 1 to 5 wherein the cooler (3a, 3b) comprises one cooling element (3).
PCT/EP2005/001725 2005-02-18 2005-02-18 Refridgerated display chest WO2006087009A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2005/001725 WO2006087009A1 (en) 2005-02-18 2005-02-18 Refridgerated display chest
EP05728735.1A EP1853139B1 (en) 2005-02-18 2005-02-18 Refridgerated display chest

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/001725 WO2006087009A1 (en) 2005-02-18 2005-02-18 Refridgerated display chest

Publications (1)

Publication Number Publication Date
WO2006087009A1 true WO2006087009A1 (en) 2006-08-24

Family

ID=34982352

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/001725 WO2006087009A1 (en) 2005-02-18 2005-02-18 Refridgerated display chest

Country Status (2)

Country Link
EP (1) EP1853139B1 (en)
WO (1) WO2006087009A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013210126A (en) * 2012-03-30 2013-10-10 Panasonic Corp Open showcase
US20160135615A1 (en) * 2014-11-13 2016-05-19 The Vollrath Company, L.L.C. Forced cold air well with false bottom insert
DE102019128365A1 (en) * 2019-10-21 2021-04-22 Kramer Gmbh Sales counter and method of operating a sales counter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3005286A1 (en) * 1979-02-14 1980-09-04 Tyler Refrigeration Corp SHOWCASE CONTAINER COUNTER WITH TOP-SIDED OPENING OR WITH LID AND WITH COOLING
US4723414A (en) 1984-10-31 1988-02-09 Sanyo Electric Co. Ltd. Low-temperature showcase
EP0889294A1 (en) * 1997-07-02 1999-01-07 EEM Tecnica Holding AG Method for performing evaporator defrosts in refrigerating cabinets and refrigerating cabinet for carrying out the method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE508865C2 (en) * 1997-03-07 1998-11-09 Electrolux Ab Refrigerated

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3005286A1 (en) * 1979-02-14 1980-09-04 Tyler Refrigeration Corp SHOWCASE CONTAINER COUNTER WITH TOP-SIDED OPENING OR WITH LID AND WITH COOLING
US4723414A (en) 1984-10-31 1988-02-09 Sanyo Electric Co. Ltd. Low-temperature showcase
EP0889294A1 (en) * 1997-07-02 1999-01-07 EEM Tecnica Holding AG Method for performing evaporator defrosts in refrigerating cabinets and refrigerating cabinet for carrying out the method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013210126A (en) * 2012-03-30 2013-10-10 Panasonic Corp Open showcase
US20160135615A1 (en) * 2014-11-13 2016-05-19 The Vollrath Company, L.L.C. Forced cold air well with false bottom insert
US9861213B2 (en) * 2014-11-13 2018-01-09 The Vollrath Company, L.L.C. Forced cold air well with false bottom insert
DE102019128365A1 (en) * 2019-10-21 2021-04-22 Kramer Gmbh Sales counter and method of operating a sales counter

Also Published As

Publication number Publication date
EP1853139A1 (en) 2007-11-14
EP1853139B1 (en) 2017-04-05

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