EP0580494A1 - Vitrinenschaukasten mit gekühltem Regal - Google Patents

Vitrinenschaukasten mit gekühltem Regal Download PDF

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Publication number
EP0580494A1
EP0580494A1 EP93401864A EP93401864A EP0580494A1 EP 0580494 A1 EP0580494 A1 EP 0580494A1 EP 93401864 A EP93401864 A EP 93401864A EP 93401864 A EP93401864 A EP 93401864A EP 0580494 A1 EP0580494 A1 EP 0580494A1
Authority
EP
European Patent Office
Prior art keywords
air
refrigerated
tray
display case
shelf
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.)
Withdrawn
Application number
EP93401864A
Other languages
English (en)
French (fr)
Inventor
Hervé Farge
Jean-Claude Neyton
Ronald Budzik
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.)
Frigoforme Sarl
Original Assignee
Frigoforme Sarl
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 Frigoforme Sarl filed Critical Frigoforme Sarl
Publication of EP0580494A1 publication Critical patent/EP0580494A1/de
Withdrawn legal-status Critical Current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
    • A47F3/0482—Details common to both closed and open types
    • A47F3/0486—Details common to both closed and open types for charging, displaying or discharging the articles
    • A47F3/0491—Cooled shelves
    • 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
    • A47F3/0482—Details common to both closed and open types
    • A47F3/0495—Spraying, trickling or humidifying means

Definitions

  • the present invention relates to a display case with refrigerated tray, for the conservation and display of food-type products. It relates more particularly to a display case with a refrigerated tray comprising means for creating an air flow forming a loop around said refrigerated tray.
  • a refrigerated display case comprising a refrigerated tray, which is a hollow body, the upper face of which is flat and can serve as a support for food products, and the interior cavity of which serves as a housing for a refrigerated product, the temperature of which is regulated.
  • the means for regulating the temperature of the refrigerant product are for example constituted by a circuit which allows the circulation of the refrigerant product outside the body, and which is equipped with means for cooling the refrigerant product, by compression and expansion of it.
  • Such a refrigerated tray has the advantage of actively participating in the cooling of the food products which it supports, and thereby allows to a certain extent to obtain temperature gradients which are less important than those which can be observed in the display cases.
  • presentation which are refrigerated by means of a conventional cold battery, the enclosure of the display case in this case being refrigerated by natural convection of air, and / or by forced circulation of air.
  • the aim set by the applicant is to improve the display cases with refrigerated tray currently known, so as to obtain a temperature uniformity on the surface of the refrigerated tray which is almost perfect, and thereby keep the food products at a constant temperature which is identical for all products, regardless of their position in the refrigerated display case.
  • the refrigerated display case of the invention which in known manner comprises on the one hand at least one refrigerated tray, at least part of which constitutes an exhibition tray serving as a food-type support, and on the other hand, means of forced air circulation.
  • the means of forced circulation of air inject air under the refrigerated tray and suck the air above said tray;
  • the edge of the exposure plate which is opposite to the part of the refrigerated plate where the air is injected, is contiguous with a vertical deflection wall and bent upwards, so that the flow of rising air which passes into the space separating said edge and the deflection wall, is redirected in the opposite direction towards the top of the exposure plate.
  • the deflection wall makes it possible to obtain an air flow which is very close to the surface of the upper wall of the exposure plate.
  • this air flow surrounding the refrigerated tray, and passing close to the surface of the exposure tray, combined with the creation of cold by the refrigerated tray, makes it possible to obtain a very good temperature uniformity of the preserved products. on the exhibition shelf.
  • all or part of the lower wall of the exposure plate has undulations whose crests are parallel to the direction of circulation of the air flow. These undulations make it possible to have a larger heat exchange surface with the air flow created. The orientation of the corrugations makes it possible not to disturb the circulation of the air flow. Ventilation is therefore more efficient.
  • all or part of the upper wall of the exposure plate has undulations whose crests are parallel to the direction of circulation of the air flow.
  • This corrugated shape of the upper wall allows, on the one hand a better circulation of the air flow which is redirected, by the deflection wall, under the products supported by the plate, and on the other hand limits the contact zones between products and the refrigerated surface, which contributes to improving the temperature uniformity of the products.
  • a problem associated with keeping a food product at the right temperature lies in the water loss of this product, which induces an equivalent loss in weight of the product. To avoid this dehydration which harms the quality of the product, it is necessary to regulate very precisely the rate of hygrometry inside the display case.
  • a known method of regulation consists in injecting moist air inside the display case. To the knowledge of the applicant, the display cases which currently use such a regulation process have a humidity rate which varies considerably over time and according to the location of the window where it is measured. The Applicant has found that the injection of moist air into the space between the above-mentioned deflection wall and the front edge of the exposure plate, combined with the ventilation created by the air flow surrounding the refrigerated plate.
  • the display case includes means for humidifying the air capable of creating a flow of moist air and a duct, one end of which is connected to the humidification means and the opposite end of which opens into the space separating the deflection wall and the edge of the exposure plate.
  • the refrigerated display case shown in Figure 1, is intended to serve as a display for the sale of food products, especially in supermarkets. It comprises a frame 1, the front edge 10 of which is fitted over its entire length with a window 2, and which supports a refrigerated tray 3.
  • the refrigerated tray 3 consists of a hollow body 30, containing a heat transfer fluid, of the glycol water type, the temperature of which is kept constant.
  • the hollow body 30 is in the form of a block comprising a hollow exposure tray 301, which serves as a support for the products presented for sale, a vertical rear part 302 also hollow, and a reservoir 303 for supply and '' heat transfer fluid.
  • the cavities of these three elements communicate with each other.
  • the lower 304 and upper 305 walls of the exposure tray 301 respectively have lower 306 and upper 307 undulations, the crests of which have a transverse direction relative to the length of the front edge 10 of the frame 1.
  • These undulations extend between the locations corresponding to sections YY 'and ZZ', the views of which are shown in Figures 2 and 3 respectively.
  • the height of the lower corrugations 306 progressively decreases from the rear to the front of the platform, that is to say from the section YY 'towards section ZZ', while the height of the upper undulations 307 gradually increases.
  • these undulations delimit, inside the exposure plate 301, identical and separate internal conduits 308 allowing transverse circulation of the heat transfer fluid inside the exposure plate, it that is to say from the rear to the front of the plate and vice versa.
  • the front part 309 of the exposure plate which is not corrugated, constitutes a distribution duct 310, into which each internal duct 308 opens, and which is parallel to the front edge 10 of the frame 1.
  • FIG. 4 a schematic top view of the hollow body 30, which shows the direction of circulation of the heat transfer fluid inside the exposure plate 301, and on which the interior conduits 308 are shown in dotted lines.
  • the reservoir 303 consists of two compartments 303a, 303b, pierced respectively with an orifice 304a, 304b.
  • the compartments 303a and 303b are respectively used for supplying and removing the heat transfer fluid contained in the hollow body 30.
  • the refrigerated tray comprises means of forced circulation 32 of the heat transfer fluid connected to the orifices 304a, 304b by means of flexible circulation conduits 34a.
  • These means of forced circulation 32 of the heat transfer fluid are for example a suction and treading pump, of the rotary positive displacement pump type.
  • the forced circulation means 32 are also connected by means of conduits 34b to cooling means 33 of the heat transfer fluid.
  • these cooling means 33 consist of a compressor connected at the inlet and at the outlet respectively to an evaporator and to a condenser, the evaporator and the condenser being respectively connected at the inlet and at the outlet to the conduits 34b .
  • the forced circulation means 32, the cooling means 33 and the conduits 34a, 34b constitute a closed circuit for cooling the heat transfer fluid, external to the hollow body 30, and which makes it possible to regulate the temperature of the heat transfer fluid contained in said body. hollow.
  • the refrigerated tray also consists of the same hollow body 30 which contains a static heat transfer fluid and which is supported directly by a cold source, such as the cold coil which is generally used in refrigeration cabinets. Maintaining the heat transfer fluid at a constant temperature is in this case achieved by heat exchange between the surface of the lower wall 304 of the exposure plate 301 of the hollow body 30, and the surface of the upper wall of the cold pack. Thanks to the convection currents which are established within the heat transfer fluid, the refrigerated tray has a uniform temperature over the entire surface of the upper wall 305 of the exposure tray 301.
  • the hollow body 30 is in one piece, and its walls are made of polyethylene.
  • polyethylene makes it possible to obtain a relatively light refrigerated tray, and therefore easy to handle.
  • polyethylene has all the necessary characteristics of food hygiene.
  • rotational molding a manufacturing process called rotational molding, known to those skilled in the art.
  • This example embodiment of the plate is not, however, limiting. It can also be made of a plastic material other than polyethylene, or be made of a metallic material, of the aluminum type.
  • the plate may not be in one piece, but consist of two half-shells assembled by welding or gluing according to the material used.
  • the presentation window also includes means for forced air circulation 4, of the fan type. Said means are fixed to the rear of the display case, behind the vertical part 302 of the hollow body 30. To access these means of forced air circulation, and thereby to the reservoir 303, it suffices to remove the removable plate 8 closing a inspection hatch 9 located at the rear of the display case.
  • the means of forced air circulation 4 create an air flow around the hollow body 30, which forms a loop represented schematically by arrows in FIG. 1. The air is injected under the exposure plate 301 of the body hollow 30, then flows in the direction of the lower corrugations 306 under said plate to the front edge 311, where it is then sucked in opposite direction above the exposure plate.
  • the lower corrugations 306 define, with the upper wall 11 of the frame 1, air circulation ducts under the exposure plate; in addition, they also serve as heat exchange fins between the surface of the bottom wall 304 of the exposure plate 301 and the ventilated air. It is the same for the upper corrugations 307. These also make it possible to reduce the contact surface with the exposed products, which contributes to a better homogeneity of their temperature.
  • the surface of the upper wall 305 of the exposure plate 301 is inclined downwards from the rear towards the front of the plate, so that the water resulting for example from the melting of the film of ice which generally covers the exposed products, can flow into the hollow of the upper undulations 307 which act as channels.
  • the water can flow to a discharge duct 6 produced in the base 7 of the frame 1. It is possible to also take advantage of the inclination of the exposure plate 301 and the upper surface 11 of the frame 1 to directly clean the hollow body 30 and the frame 1 by injecting pressurized water on the surface of the exposure plate 301 , which water then flows to the evacuation duct 6, driving along any passage of dirt.
  • the front edge 10 of the frame 1 is also provided, over the entire length L of the exposure plate 301, with a part 15 bent upwards.
  • the air which arrives at the front edge 311 of the exposure plate 301 passes through the space 12 separating the deflection wall 16 of the part 15 and the front edge 311, and is deflected towards the rear of the exposure plate 301 by said deflection wall.
  • the air which is sucked above the exposure plate 301 thus circulates near the surface of the upper wall 305 of the exposure plate 301; the exposed products are therefore better ventilated, and at the same time the formation of condensation on the glass 2 is avoided.
  • Such means are known to those skilled in the art. They include a container containing a liquid which is most often water, and in which oscillations are created using an ultrasound system. The air located above the container is therefore highly charged with humidity, and is ventilated by means of ventilation type fan.
  • the humidification means 14 are connected to the end 13a of a humidification conduit 13 formed in the frame 1, and the opposite end 13b of which opens into the space 12.
  • the air ventilated by the means forced air circulation 4 is charged with moisture by crossing the space 12, which allows the humidity level to be maintained at a constant level.
  • the front part 17 of the frame 1 includes a cavity (not shown) which extends over the entire length of the front face of the display case.
  • the front part 17 of the frame is regularly pierced with orifices (not shown) which directly communicate said interior cavity with the space 12.
  • the end 13b of the humidification duct opens into the cavity of the front part 17 of the frame 1.
  • This cavity then acts as a distribution duct, over the entire length of the display case, for ventilated moist air which is created by the humidification means 14.
  • the window 2 shown in Figure 1 is a laminated glass, in which was incorporated during the manufacturing process, a material which filters the ultraviolet radiation.
  • Securit glass which has hitherto always been used for the manufacture of windows for refrigerated display cases.
  • the use of laminated glass makes it possible to obtain panes having a strongly curved shape, unlike Securit glass.
  • the invention is not limited to the description which has just been made of a particular embodiment of a refrigerated display case according to the invention.
  • a display case of the refrigerated cupboard type comprising either several superimposed refrigerated trays, or a single refrigerated tray whose hollow body consists of a plurality of exposure trays superimposed on each other so as to constitute a shelf.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
EP93401864A 1992-07-23 1993-07-20 Vitrinenschaukasten mit gekühltem Regal Withdrawn EP0580494A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9209318 1992-07-23
FR9209318A FR2693891B1 (fr) 1992-07-23 1992-07-23 Plateau et vitrine de présentation réfrigérés.

Publications (1)

Publication Number Publication Date
EP0580494A1 true EP0580494A1 (de) 1994-01-26

Family

ID=9432355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93401864A Withdrawn EP0580494A1 (de) 1992-07-23 1993-07-20 Vitrinenschaukasten mit gekühltem Regal

Country Status (2)

Country Link
EP (1) EP0580494A1 (de)
FR (1) FR2693891B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778733A1 (fr) 1998-05-12 1999-11-19 Austria Haus Technik Aktienges Etageres-echangeurs pour meuble frigorifique de vente et meuble frigorifique realise au moyen de telles etageres
FR2821730A1 (fr) 2001-03-08 2002-09-13 Fun Air Vitrine refrigeree pour la presentaiton de produits alimentaires

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE704532A (de) * 1967-09-29 1968-02-01
DE1501301A1 (de) * 1965-04-09 1969-06-26 Siemens Elektrogeraete Gmbh Rost fuer einen Kuehlbehaelter
DE2420632A1 (de) * 1974-04-27 1975-11-13 Broecker Ladenbau Kg Kuehltheke
NL8602780A (nl) * 1986-11-03 1988-06-01 Fri Jado Wilmeta B V Koeltoonbank.
GB2247068A (en) * 1990-07-07 1992-02-19 Invicta Plastics Ltd A container for cooling articles such as cans

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2029860A (en) * 1934-05-05 1936-02-04 Daemicke Company Refrigerator display case
US2068074A (en) * 1934-12-20 1937-01-19 Fay T Rodgers Refrigerator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1501301A1 (de) * 1965-04-09 1969-06-26 Siemens Elektrogeraete Gmbh Rost fuer einen Kuehlbehaelter
BE704532A (de) * 1967-09-29 1968-02-01
DE2420632A1 (de) * 1974-04-27 1975-11-13 Broecker Ladenbau Kg Kuehltheke
NL8602780A (nl) * 1986-11-03 1988-06-01 Fri Jado Wilmeta B V Koeltoonbank.
GB2247068A (en) * 1990-07-07 1992-02-19 Invicta Plastics Ltd A container for cooling articles such as cans

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778733A1 (fr) 1998-05-12 1999-11-19 Austria Haus Technik Aktienges Etageres-echangeurs pour meuble frigorifique de vente et meuble frigorifique realise au moyen de telles etageres
FR2821730A1 (fr) 2001-03-08 2002-09-13 Fun Air Vitrine refrigeree pour la presentaiton de produits alimentaires

Also Published As

Publication number Publication date
FR2693891A1 (fr) 1994-01-28
FR2693891B1 (fr) 1994-10-14

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