EP0957732B1 - Open horizontal refrigerated display cabinet for frozen or refrigerated food - Google Patents

Open horizontal refrigerated display cabinet for frozen or refrigerated food Download PDF

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Publication number
EP0957732B1
EP0957732B1 EP96937385A EP96937385A EP0957732B1 EP 0957732 B1 EP0957732 B1 EP 0957732B1 EP 96937385 A EP96937385 A EP 96937385A EP 96937385 A EP96937385 A EP 96937385A EP 0957732 B1 EP0957732 B1 EP 0957732B1
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EP
European Patent Office
Prior art keywords
cold air
air
deflector
curtain
flow
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EP96937385A
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German (de)
French (fr)
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EP0957732A1 (en
Inventor
Christian Morillon
François Penot
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Individual
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Individual
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    • 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

Definitions

  • the present invention relates to a refrigeration unit of horizontal and open sale, intended for frozen food or refrigerated.
  • horizontal refrigeration cabinets such as verticals tend to be open, i.e. without protective cover or door, to facilitate and encourage spontaneous purchase of food by consumers.
  • the food are directly exposed to the ambient air which is generally at a temperature of around 25-30 ° C and are subject to infrared radiation from the environment outside that warms them.
  • These refrigeration units have a main circuit cold air to form one or more cold air curtains on the exposed surface of frozen or chilled food, in order to keep them in a satisfactory condition.
  • the aforementioned bathtub is generally materialized by side walls of the refrigeration unit which protrude one certain height the surface of the food.
  • the present invention therefore aims to eliminate the aforementioned drawbacks and to propose a piece of furniture horizontal and open sales refrigerator, intended for frozen or chilled food, ensuring optimal cooling of the latter while limiting the energy expenditure and despite flow rates of the higher cold air flows.
  • the subject of the present invention is a horizontal and open refrigerated sales unit, intended frozen or chilled foodstuffs, of the type comprising a box and a bin inside of it, for storage said foodstuffs, and a main cold air circuit flowing in the space delimited between the box and the tank below and next to it and having cold air blowing nozzles to form at least one curtain of cold air on the surface of commodities that are exposed between two opposite edges of the bin, on one of which are arranged said blowing nozzles, and a return of part of the cold air from said curtain, arranged at the edge opposite to that where the blowing nozzles, to recirculate this part of the cold air in said space, the cold air being blown at such a speed for example of the order of 2 m / s, that the air flow becomes turbulent, a deflector on the other part of the cold air flow from the cold air curtain being provided at level of cold air return to return this part of the air as a relatively mixed air stream colder than the ambient air in the opposite
  • the deflector has section a substantially U-shaped shape whose opening is oriented towards the inside of the cabinet.
  • the deflector has section a shape substantially C flattened or chistera whose opening is oriented towards the inside of the cabinet, the deflector can then also have the function to partially shield infrared radiation.
  • the part upper side of the deflector is fitted with an internal lining and spaced therefrom, said lining defining with said upper part of the deflector a divergent channel or with increasing section in the opposite direction to the flow of cold air flow, which slows the flow velocity of the surface layer of air mixed in the tub and thereby reduces turbulence to the interface between the ambient air and the air loop aforementioned intermediary.
  • the lower part of the deflector is equipped with a separator to separate the air flow drawn in by the main circuit of the mixed air flow returned in reverse in the furniture, thereby reducing the turbulence at the separation zone of the two flows.
  • the separator is a curved plate in the direction of the mixed air flow entering the deflector, said plate being spaced from the lower part of the deflector to define a passage secondary with air intake.
  • the separator is a curved plate towards the cold air flow drawn in by the main circuit, said plate being spaced from the lower part of the deflector to define a passage secondary with air intake.
  • the glazing can be functionally part of the aforementioned deflector.
  • the furniture of the invention comprises a structure with multiple air layers, growing cold, starting for example with a layer of air superficial slowed down to the curtain of cold air main, passing through the mixed air loop relatively cooler intermediate.
  • the refrigerated display cabinet of the invention comprises a double-walled box 1 containing an insulator 2, by polyurethane example, and having for example a shape substantially elongated and open upward defining a horizontal upper opening 3.
  • a tray 4 for the storage of frozen products or refrigerated 5 (shown schematically in Figures 2 to 8) is mounted inside the casing 1, so that a duct 6 for the main circulation of recycled cold air, i.e. defined between the internal wall of the box 1 and the wall outside of tray 4.
  • a suction fan 7 and an evaporator 8 are mounted through the sheath 6, the evaporator being supplied in refrigerant.
  • the aforementioned sheath 6 opens at the opening upper 3 in blowing nozzles 9 which produce at least one curtain of cold air R on the surface of the tank 4.
  • the heat absorbed by the food by radiation from the ambient environment is extracted from these by forced convection between the surface of frozen food or containers in tray 4 and the air curtain cold R.
  • the cold air curtain R is recycled in the duct 6 by suction at an air intake 10.
  • the upper part of box 1 at the recovery cold air 10 here consists of triple glazing vertical transparent 11 for easy viewing of consumer goods.
  • the most internal glazing of the aforementioned triple glazing 11 is functionally part of the deflector D1 of the invention which here comprises an upper wall 12 equipped with an internal lining 13, and a plate separation 14 in the shape of a longitudinal and curved fin downwards or in the direction of the cold air intake, in the vicinity of glazing 11.
  • the profiled fin 14 promotes the directional flow of the cold air curtain R to main circuit 6 and flow of mixed air entrained by the turbulent flow of the curtain R towards the deflector D1 to make it return in direction reverse above curtain R, following loop B.
  • the lining 13 which is in the form of a sheet bent downwards and towards the glazing 11, is spaced therefrom to define a C channel divergent or increasing in section through which passes a layer of superficial mixed air S whose speed is weak to reduce turbulence at the interface with external ambient air.
  • the curved end of the separating fin 14 is also spaced from the glazing 11 to define a passage secondary P1 to main circuit 6.
  • This secondary passage P1 facilitates the separation of cold air flow and air mixed with level of return air.
  • the T-shaped soil has been indicated in Figure 1 to define the orientation of the refrigerated display cabinet supra.
  • the deflector D2 has in section vertical perpendicular to the longitudinal extension of the furniture, a shape substantially flattened C or chistera whose opening is oriented towards the inside of the cabinet.
  • the deflector D2 here extends over a large part of the upper opening 3 of the box 1 to protect partially the foodstuffs 5 of the infrared radiation, whereas in figure 1, the deflector D1 is clearly smaller and confined to the air intake.
  • the deflector D2 here has neither separator nor lining.
  • the deflector D2 could alternatively be much smaller and confined to the level of the return air 10.
  • Figure 3 partially shows yet another mode of the furniture of the invention, in which the deflector D3 has a substantially U-shaped shape whose opening is oriented towards the inside of the cabinet.
  • the deflector D3 here has a larger size than the deflector D1 of Figure 1 and is distinguished from the latter in particular by the fact that the separator 15 is here a plate ensuring a continuous connection both with the inner wall of deflector D3 and with the inner wall of box 1, so the aforementioned passage P1 is here deleted.
  • FIG. 4 represents a variant of the embodiment shown in Figure 3, in which the separator 16 is a profiled fin-shaped plate curved towards the top towards the mixed air flow B.
  • the curved end of the fin 16 is spaced here from the lower part of deflector D3 to define a passage secondary P2 communicating with the main circuit 6.
  • FIG. 5 represents a variant of FIG. 3, in which the separator 14 has a shape substantially identical to that of figure 1.
  • Figure 7 is similar to Figure 6 except that the panel 17 has been deleted and replaced by a transparent plate horizontal, for example glass or plastic such as polymethacrylate, fixed on the deflector D3 in the plane of its upper wall 12, to facilitate viewing food 5.
  • a transparent plate horizontal for example glass or plastic such as polymethacrylate
  • Figure 8 groups together the variants of Figures 6 and 7, with the panel 17 mounted on the aforementioned plate 18.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Description

La présente invention concerne un meuble frigorifique de vente horizontal et ouvert, destiné aux denrées surgelées ou réfrigérées.The present invention relates to a refrigeration unit of horizontal and open sale, intended for frozen food or refrigerated.

Actuellement, les meubles frigorifiques horizontaux comme verticaux ont tendance à être ouverts, c'est-à-dire sans couvercle ou porte de protection, pour faciliter et inciter l'achat spontané des denrées alimentaires par des consommateurs.Currently, horizontal refrigeration cabinets such as verticals tend to be open, i.e. without protective cover or door, to facilitate and encourage spontaneous purchase of food by consumers.

Dans de tels meubles frigorifiques ouverts, les denrées alimentaires sont directement exposées à l'air ambiant qui est généralement à une température d'environ 25-30°C et sont soumises au rayonnement infrarouge de l'environnement extérieur qui les réchauffe.In such open refrigerated cabinets, the food are directly exposed to the ambient air which is generally at a temperature of around 25-30 ° C and are subject to infrared radiation from the environment outside that warms them.

Ces meubles frigorifiques comportent un circuit principal d'air froid pour former un ou plusieurs rideaux d'air froid à la surface exposée des denrées surgelées ou réfrigérées, afin de les conserver dans un état satisfaisant.These refrigeration units have a main circuit cold air to form one or more cold air curtains on the exposed surface of frozen or chilled food, in order to keep them in a satisfactory condition.

Un tel dispositif est décrit par exemple dans US-A-2 447 759.Such a device is described for example in US-A-2 447 759.

Jusqu'à présent, pour conserver les denrées surgelées, on soufflait généralement de l'air froid à la surface exposée des denrées à une température comprise par exemple entre -28 et -30°C et à une vitesse d'environ 0,8-1 m/s par exemple, pour extraire par convection forcée la chaleur absorbée par rayonnement par les denrées.So far, to keep frozen food, we usually blows cold air to the exposed surface food at a temperature for example between -28 and -30 ° C and at a speed of about 0.8-1 m / s per example, to extract heat by forced convection absorbed by radiation from food.

A cette vitesse, l'écoulement d'air froid à la surface des denrées est laminaire et donc peu de turbulences se produisent à l'interface entre le rideau d'air froid et l'air ambiant, de sorte que :

  • le rideau d'air froid soufflé se mélange peu avec l'air ambiant, minimisant ainsi le réchauffement du rideau d'air froid par transfert convectif de chaleur avec l'air ambiant, ce qui réduit la quantité d'énergie que doit fournir l'évaporateur du circuit principal, à chaque cycle de réfrigération,
  • la faible quantité d'air mélangé au-dessus du rideau d'air froid est faiblement entraínée par la circulation du flux d'air froid et reste confinée dans le meuble du fait de sa faible vitesse, formant ainsi une "baignoire" remplie d'air relativement plus froid que l'air ambiant, ce qui réduit le transfert de chaleur avec le rideau d'air.
At this speed, the flow of cold air on the surface of the foodstuffs is laminar and therefore little turbulence occurs at the interface between the curtain of cold air and the ambient air, so that:
  • the cold air curtain blows little with the ambient air, thus minimizing the heating of the cold air curtain by convective heat transfer with the ambient air, which reduces the amount of energy that the main circuit evaporator, at each refrigeration cycle,
  • the small amount of air mixed above the curtain of cold air is weakly driven by the circulation of the cold air flow and remains confined in the cabinet due to its low speed, thus forming a "bathtub" filled with air relatively cooler than ambient air, which reduces heat transfer with the air curtain.

La baignoire précitée est généralement matérialisée par les parois latérales du meuble frigorifique qui dépassent d'une certaine hauteur la surface des denrées.The aforementioned bathtub is generally materialized by side walls of the refrigeration unit which protrude one certain height the surface of the food.

Toutefois, pour atteindre des températures plus basses, de l'ordre de -18°C au coeur des denrées, comme cela est désormais exigé pour les aliments surgelés, il peut être nécessaire d'augmenter la vitesse d'écoulement du rideau d'air froid, par exemple à une vitesse de soufflage de l'ordre de 2-2,5 m/s.However, to reach lower temperatures, around -18 ° C at the heart of the food, as is now required for frozen food, it can be necessary to increase the flow speed of the curtain cold air, for example at a blowing speed of in the range of 2-2.5 m / s.

A cette vitesse, l'écoulement d'air froid passe du régime laminaire au régime turbulent, ce qui a les conséquences suivantes :

  • l'air ambiant se mélange beaucoup plus avec le flux d'air froid, ce qui provoque un réchauffement nettement plus important de ce dernier et nécessite donc plus d'énergie pour le refroidir à chaque cycle dans l'évaporateur,
  • la grande quantité d'air mélangé située au-dessus du rideau d'air froid est entraínée par la circulation du flux d'air froid à une vitesse trop élevée pour que l'air ainsi mélangé reste confiné dans le meuble et s'en échappe donc, supprimant l'effet "baignoire".
At this speed, the flow of cold air changes from the laminar regime to the turbulent regime, which has the following consequences:
  • the ambient air mixes much more with the cold air flow, which causes a much greater heating of the latter and therefore requires more energy to cool it each cycle in the evaporator,
  • the large amount of mixed air located above the curtain of cold air is caused by the circulation of the flow of cold air at a speed too high for the air thus mixed remains confined in the cabinet and escapes from it therefore, removing the "bathtub" effect.

La solution consistant à élever encore la hauteur des parois latérales du meuble frigorifique n'est pas acceptable car les denrées deviendraient alors inaccessibles au consommateur. The solution of further raising the height of the side walls of the refrigerator is not acceptable because the food would then become inaccessible to the consumer.

Bien entendu, le même problème peut se poser pour les denrées simplement réfrigérées à une température d'environ +4°C pour des produits sensibles tels que la viande et +8°C pour les produits tels que les laitages, si l'on souhaite augmenter la vitesse d'écoulement du flux d'air froid.Of course, the same problem can arise for food simply chilled to a temperature of about + 4 ° C for sensitive products such as meat and + 8 ° C for products such as dairy products, if you wish increase the flow speed of the cold air flow.

La présente invention a donc pour but d'éliminer les inconvénients précités et de proposer un meuble frigorifique de vente horizontal et ouvert, destiné aux denrées surgelées ou réfrigérées, assurant une réfrigération optimale de ces dernières tout en limitant la dépense d'énergie et malgré des vitesses d'écoulement du flux d'air froid plus élevées.The present invention therefore aims to eliminate the aforementioned drawbacks and to propose a piece of furniture horizontal and open sales refrigerator, intended for frozen or chilled food, ensuring optimal cooling of the latter while limiting the energy expenditure and despite flow rates of the higher cold air flows.

A cet effet, la présente invention a pour objet un meuble frigorifique de vente horizontal et ouvert, destiné aux denrées surgelées ou réfrigérées, du type comprenant un caisson et un bac à l'intérieur de celui-ci, pour le stockage desdites denrées, et un circuit principal d'air froid s'écoulant dans l'espace délimité entre le caisson et le bac en-dessous et à côté de celui-ci et ayant des buses de soufflage d'air froid pour former au moins un rideau d'air froid à la surface des denrées qui sont exposées entre deux bords opposés du bac, sur l'un desquels sont disposées lesdites buses de soufflage, et une reprise d'une partie de l'air froid dudit rideau, disposée au niveau du bord opposé à celui où sont situées les buses de soufflage, pour recirculer cette partie de l'air froid dans ledit espace, l'air froid étant soufflé à une vitesse telle par exemple de l'ordre de 2 m/s, que l'écoulement d'air devient turbulent, un déflecteur de l'autre partie de l'écoulement d'air froid du rideau d'air froid étant prévu au niveau de la reprise d'air froid pour retourner cette partie de l'air sous forme d'un flux d'air mélangé relativement plus froid que l'air ambiant en sens inverse au-dessus du rideau d'air froid précité, formant une boucle d'air mélangé relativement froid intermédiaire entre le rideau d'air froid et l'air ambiant.To this end, the subject of the present invention is a horizontal and open refrigerated sales unit, intended frozen or chilled foodstuffs, of the type comprising a box and a bin inside of it, for storage said foodstuffs, and a main cold air circuit flowing in the space delimited between the box and the tank below and next to it and having cold air blowing nozzles to form at least one curtain of cold air on the surface of commodities that are exposed between two opposite edges of the bin, on one of which are arranged said blowing nozzles, and a return of part of the cold air from said curtain, arranged at the edge opposite to that where the blowing nozzles, to recirculate this part of the cold air in said space, the cold air being blown at such a speed for example of the order of 2 m / s, that the air flow becomes turbulent, a deflector on the other part of the cold air flow from the cold air curtain being provided at level of cold air return to return this part of the air as a relatively mixed air stream colder than the ambient air in the opposite direction above the curtain above cold air, forming a mixed air loop relatively cold intermediate between the curtain of cold air and the ambient air.

Dans une variante de réalisation, le déflecteur a en section une forme sensiblement en U couché dont l'ouverture est orientée vers l'intérieur du meuble.In an alternative embodiment, the deflector has section a substantially U-shaped shape whose opening is oriented towards the inside of the cabinet.

Selon une autre variante de réalisation, le déflecteur a en section une forme sensiblement en C aplati ou en chistera dont l'ouverture est orientée vers l'intérieur du meuble, le déflecteur pouvant alors également avoir pour fonction de faire partiellement écran au rayonnement infrarouge. According to another alternative embodiment, the deflector has section a shape substantially C flattened or chistera whose opening is oriented towards the inside of the cabinet, the deflector can then also have the function to partially shield infrared radiation.

Selon une autre caractéristique de l'invention, la partie supérieure du déflecteur est équipée d'une doublure interne et espacée de celle-ci, ladite doublure définissant avec ladite partie supérieure du déflecteur un canal divergent ou à section croissante dans le sens contraire à l'écoulement du flux d'air froid, ce qui ralentit la vitesse d'écoulement de la couche superficielle d'air mélangé dans la baignoire et réduit ainsi les turbulences à l'interface entre l'air ambiant et la boucle d'air intermédiaire précitée.According to another characteristic of the invention, the part upper side of the deflector is fitted with an internal lining and spaced therefrom, said lining defining with said upper part of the deflector a divergent channel or with increasing section in the opposite direction to the flow of cold air flow, which slows the flow velocity of the surface layer of air mixed in the tub and thereby reduces turbulence to the interface between the ambient air and the air loop aforementioned intermediary.

Selon encore une autre caractéristique de l'invention, la partie inférieure du déflecteur est équipée d'un séparateur pour séparer le flux d'air aspiré par le circuit principal du flux d'air mélangé retourné en sens inverse dans le meuble, ce qui atténue ainsi les turbulences au niveau de la zone de séparation des deux écoulements.According to yet another characteristic of the invention, the lower part of the deflector is equipped with a separator to separate the air flow drawn in by the main circuit of the mixed air flow returned in reverse in the furniture, thereby reducing the turbulence at the separation zone of the two flows.

Dans un mode de réalisation particulier, le séparateur est une plaque courbée en direction du flux d'air mélangé entrant dans le déflecteur, ladite plaque étant espacée de la partie inférieure du déflecteur pour définir un passage secondaire avec la reprise d'air.In a particular embodiment, the separator is a curved plate in the direction of the mixed air flow entering the deflector, said plate being spaced from the lower part of the deflector to define a passage secondary with air intake.

Dans un autre mode de réalisation, le séparateur est une plaque courbée en direction du flux d'air froid aspiré par le circuit principal, ladite plaque étant espacée de la partie inférieure du déflecteur pour définir un passage secondaire avec la reprise d'air.In another embodiment, the separator is a curved plate towards the cold air flow drawn in by the main circuit, said plate being spaced from the lower part of the deflector to define a passage secondary with air intake.

Lorsque le meuble frigorifique est équipé d'un vitrage vertical au niveau de la reprise d'air, le vitrage peut faire fonctionnellement partie du déflecteur précité.When the refrigeration unit is fitted with glazing vertical at the air intake, the glazing can be functionally part of the aforementioned deflector.

Selon encore une autre caractéristique de l'invention, on peut monter un panneau vertical au-dessus du déflecteur précité pour former une seconde baignoire au-dessus de la boucle intermédiaire précitée. According to yet another characteristic of the invention, one can mount a vertical panel above the deflector above to form a second bathtub above the aforementioned intermediate loop.

On voit ainsi que le meuble de l'invention comporte une structure à couches d'air multiples, de plus en plus froide, en partant par exemple d'une couche d'air superficielle ralentie jusqu'au rideau d'air froid principal, en passant par la boucle d'air mélangé relativement plus froid intermédiaire.It can thus be seen that the furniture of the invention comprises a structure with multiple air layers, growing cold, starting for example with a layer of air superficial slowed down to the curtain of cold air main, passing through the mixed air loop relatively cooler intermediate.

L'invention sera mieux comprise, et d'autres buts, caractéristiques et détails de l'invention apparaítront plus clairement au cours de la description explicative qui va suivre de plusieurs modes de réalisation actuellement préférés de l'invention, donnés uniquement à titre illustratif et non limitatif en référence aux dessins schématiques annexés, dans lesquels :

  • La figure 1 est une vue schématique, en coupe verticale et en élévation d'un meuble frigorifique conforme à l'invention.
  • La figure 2 est une vue schématique et en coupe verticale de la partie supérieure d'un autre mode de réalisation du meuble de l'invention.
  • La figure 3 est une vue schématique et en coupe verticale de la partie de reprise d'air d'encore un autre mode de réalisation du meuble de l'invention.
  • Les figures 4 et 5 sont des vues analogues à la figure 3, mais représentant des variantes de réalisation dans lesquelles le séparateur est respectivement recourbé vers le haut et vers le bas.
  • Les figures 6 à 8 représentent le même déflecteur que celui de la figure 4, sur lequel est monté respectivement un panneau vertical, une plaque transparente horizontale et l'ensemble combiné du panneau et de la plaque.
    • The invention will be better understood, and other objects, characteristics and details of the invention will appear more clearly during the explanatory description which will follow of several currently preferred embodiments of the invention, given solely by way of illustration and not limiting with reference to the appended schematic drawings, in which:
  • Figure 1 is a schematic view, in vertical section and in elevation of a refrigeration unit according to the invention.
  • Figure 2 is a schematic view in vertical section of the upper part of another embodiment of the furniture of the invention.
  • Figure 3 is a schematic view in vertical section of the air return portion of yet another embodiment of the furniture of the invention.
  • Figures 4 and 5 are views similar to Figure 3, but showing alternative embodiments in which the separator is respectively curved upwards and downwards.
  • Figures 6 to 8 show the same deflector as that of Figure 4, on which is mounted respectively a vertical panel, a transparent horizontal plate and the combined assembly of the panel and the plate.

    • Suivant l'exemple de réalisation représenté sur la figure 1, le meuble frigorifique de vente de l'invention comporte un caisson 1 à double paroi renfermant un isolant 2, par exemple en polyuréthane, et ayant par exemple une forme sensiblement allongée et ouverte vers le haut définissant une ouverture supérieure horizontale 3.According to the embodiment shown in the figure 1, the refrigerated display cabinet of the invention comprises a double-walled box 1 containing an insulator 2, by polyurethane example, and having for example a shape substantially elongated and open upward defining a horizontal upper opening 3.

    Un bac 4 pour le stockage de produits surgelés ou réfrigérés 5 (montrés schématiquement sur les figures 2 à 8) est monté à l'intérieur du caisson 1, de sorte qu'une gaine 6 de circulation principale d'air froid recyclé soit définie entre la paroi interne du caisson 1 et la paroi externe du bac 4.A tray 4 for the storage of frozen products or refrigerated 5 (shown schematically in Figures 2 to 8) is mounted inside the casing 1, so that a duct 6 for the main circulation of recycled cold air, i.e. defined between the internal wall of the box 1 and the wall outside of tray 4.

    Un ventilateur d'aspiration 7 et un évaporateur 8 sont montés à travers la gaine 6, l'évaporateur étant alimenté en fluide frigorigène.A suction fan 7 and an evaporator 8 are mounted through the sheath 6, the evaporator being supplied in refrigerant.

    On peut bien entendu prévoir plusieurs ventilateurs ou évaporateurs dans le circuit principal d'air froid.It is of course possible to provide several fans or evaporators in the main cold air circuit.

    La gaine 6 précitée débouche au niveau de l'ouverture supérieure 3 dans des buses de soufflage 9 qui produisent au moins un rideau d'air froid R à la surface du bac 4.The aforementioned sheath 6 opens at the opening upper 3 in blowing nozzles 9 which produce at least one curtain of cold air R on the surface of the tank 4.

    La chaleur absorbée par les denrées par rayonnement de l'environnement ambiant est extraite de celles-ci par convection forcée entre la surface des denrées surgelées ou réfrigérées contenues dans le bac 4 et le rideau d'air froid R.The heat absorbed by the food by radiation from the ambient environment is extracted from these by forced convection between the surface of frozen food or containers in tray 4 and the air curtain cold R.

    Le rideau d'air froid R est recyclé dans la gaine 6 par aspiration au niveau d'une reprise d'air 10.The cold air curtain R is recycled in the duct 6 by suction at an air intake 10.

    Dans l'exemple particulier de réalisation de la figure 1, la partie supérieure du caisson 1 au niveau de la reprise d'air froid 10 est constituée ici d'un triple vitrage transparent vertical 11 pour faciliter la visualisation des denrées par le consommateur.In the particular embodiment of FIG. 1, the upper part of box 1 at the recovery cold air 10 here consists of triple glazing vertical transparent 11 for easy viewing of consumer goods.

    Le vitrage le plus interne du triple vitrage 11 précité fait fonctionnellement partie du déflecteur D1 de l'invention qui comprend ici une paroi supérieure 12 équipée d'une doublure interne 13, et une plaque de séparation 14 en forme d'ailette longitudinale et recourbée vers le bas ou dans le sens de l'aspiration de l'air froid, au voisinage du vitrage 11.The most internal glazing of the aforementioned triple glazing 11 is functionally part of the deflector D1 of the invention which here comprises an upper wall 12 equipped with an internal lining 13, and a plate separation 14 in the shape of a longitudinal and curved fin downwards or in the direction of the cold air intake, in the vicinity of glazing 11.

    L'ailette profilée 14 favorise l'écoulement directionnel du rideau d'air froid R vers le circuit principal 6 et du flux d'air mélangé entraíné par l'écoulement turbulent du rideau R vers le déflecteur D1 pour le faire retourner en sens inverse au-dessus du rideau R, suivant la boucle B.The profiled fin 14 promotes the directional flow of the cold air curtain R to main circuit 6 and flow of mixed air entrained by the turbulent flow of the curtain R towards the deflector D1 to make it return in direction reverse above curtain R, following loop B.

    On voit toujours sur la figure 1 que la doublure 13 qui est en forme de tôle recourbée vers le bas et vers le vitrage 11, est espacée de celui-ci pour définir un canal C divergent ou à section croissante à travers lequel passe une couche d'air mélangé superficielle S dont la vitesse est faible pour réduire les turbulences à l'interface avec l'air ambiant externe.We always see in Figure 1 that the lining 13 which is in the form of a sheet bent downwards and towards the glazing 11, is spaced therefrom to define a C channel divergent or increasing in section through which passes a layer of superficial mixed air S whose speed is weak to reduce turbulence at the interface with external ambient air.

    L'extrémité recourbée de l'ailette de séparation 14 est également espacée du vitrage 11 pour définir un passage secondaire P1 vers le circuit principal 6.The curved end of the separating fin 14 is also spaced from the glazing 11 to define a passage secondary P1 to main circuit 6.

    La présence de ce passage secondaire P1 facilite la séparation de l'écoulement d'air froid et d'air mélangé au niveau de la reprise d'air.The presence of this secondary passage P1 facilitates the separation of cold air flow and air mixed with level of return air.

    On a indiqué sur la figure 1 le sol en T pour définir l'orientation du meuble frigorifique de vente panoramique précité.The T-shaped soil has been indicated in Figure 1 to define the orientation of the refrigerated display cabinet supra.

    On a représenté schématiquement sur la figure 2 la partie supérieure d'un autre mode de réalisation du meuble de l'invention.Schematically shown in Figure 2 the part top of another embodiment of the furniture the invention.

    Dans ce mode de réalisation, le déflecteur D2 a en section verticale perpendiculaire à l'extension longitudinale du meuble, une forme sensiblement en C aplati ou en chistera dont l'ouverture est orientée vers l'intérieur du meuble. In this embodiment, the deflector D2 has in section vertical perpendicular to the longitudinal extension of the furniture, a shape substantially flattened C or chistera whose opening is oriented towards the inside of the cabinet.

    Le déflecteur D2 s'étend ici sur une grande partie de l'ouverture supérieure 3 du caisson 1 pour protéger partiellement les denrées 5 du rayonnement infrarouge, alors que dans la figure 1, le déflecteur D1 est nettement plus petit et confiné au niveau de la reprise d'air.The deflector D2 here extends over a large part of the upper opening 3 of the box 1 to protect partially the foodstuffs 5 of the infrared radiation, whereas in figure 1, the deflector D1 is clearly smaller and confined to the air intake.

    Le déflecteur D2 ne comporte ici ni séparateur ni doublure.The deflector D2 here has neither separator nor lining.

    Bien entendu, le déflecteur D2 pourrait en variante être beaucoup plus petit et confiné au niveau de la zone de reprise d'air 10.Of course, the deflector D2 could alternatively be much smaller and confined to the level of the return air 10.

    La figure 3 représente partiellement encore un autre mode de réalisation du meuble de l'invention, dans lequel le déflecteur D3 présente une forme sensiblement en U couché dont l'ouverture est orientée vers l'intérieur du meuble.Figure 3 partially shows yet another mode of the furniture of the invention, in which the deflector D3 has a substantially U-shaped shape whose opening is oriented towards the inside of the cabinet.

    Le déflecteur D3 a ici une taille plus grande que le déflecteur D1 de la figure 1 et se distingue de ce dernier notamment par le fait que le séparateur 15 est ici une plaque assurant une liaison continue à la fois avec la paroi interne du déflecteur D3 et avec la paroi interne du caisson 1, de sorte que le passage P1 précité est ici supprimé.The deflector D3 here has a larger size than the deflector D1 of Figure 1 and is distinguished from the latter in particular by the fact that the separator 15 is here a plate ensuring a continuous connection both with the inner wall of deflector D3 and with the inner wall of box 1, so the aforementioned passage P1 is here deleted.

    La figure 4 représente une variante du mode de réalisation représenté sur la figure 3, dans laquelle le séparateur 16 est une plaque en forme d'ailette profilée recourbée vers le haut en direction du flux d'air mélangé B.FIG. 4 represents a variant of the embodiment shown in Figure 3, in which the separator 16 is a profiled fin-shaped plate curved towards the top towards the mixed air flow B.

    L'extrémité recourbée de l'ailette 16 est espacée ici de la partie inférieure du déflecteur D3 pour définir un passage secondaire P2 communiquant avec le circuit principal 6.The curved end of the fin 16 is spaced here from the lower part of deflector D3 to define a passage secondary P2 communicating with the main circuit 6.

    La figure 5 représente une variante de la figure 3, dans laquelle le séparateur 14 a une forme sensiblement identique à celui de la figure 1.FIG. 5 represents a variant of FIG. 3, in which the separator 14 has a shape substantially identical to that of figure 1.

    Sur la figure 6, on a représenté le déflecteur D3 de la figure 4 sur la paroi supérieure 12 duquel est monté un panneau vertical 17 qui est destiné à créer une seconde "baignoire" au-dessus de la boucle intermédiaire B précitée.In FIG. 6, the deflector D3 of the Figure 4 on the upper wall 12 which is mounted a vertical panel 17 which is intended to create a second "bathtub" above the intermediate loop B supra.

    La figure 7 est analogue à la figure 6, sauf que le panneau 17 a été supprimé et remplacé par une plaque transparente horizontale, par exemple en verre ou en plastique tel que polyméthacrylate, fixée sur le déflecteur D3 dans le plan de sa paroi supérieure 12, pour faciliter la visualisation des denrées 5.Figure 7 is similar to Figure 6 except that the panel 17 has been deleted and replaced by a transparent plate horizontal, for example glass or plastic such as polymethacrylate, fixed on the deflector D3 in the plane of its upper wall 12, to facilitate viewing food 5.

    La figure 8 regroupe ensemble les variantes des figures 6 et 7, avec le panneau 17 monté sur la plaque 18 précitée.Figure 8 groups together the variants of Figures 6 and 7, with the panel 17 mounted on the aforementioned plate 18.

    On voit mieux sur la figure 1 que dans le meuble de l'invention, les écoulements d'air froid ou relativement froid par rapport à l'air ambiant définissent une structure stratifiée ou à couche d'air multiple assurant une déperdition d'énergie minimale au niveau de l'ouverture 3.We can see better in Figure 1 than in the cabinet of the invention, cold air flows or relatively cold in relation to the ambient air define a structure laminate or multiple air layer ensuring minimum energy loss at the opening 3.

    Bien -que l'invention ait été décrite en liaison avec plusieurs modes de réalisation particuliers, il est bien évident qu'elle n'y est pas limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci sont effectuées dans le cadre des revendications qui suivent.Although the invention has been described in connection with several particular embodiments, it is well obvious that she is not limited to it and that she understands all technical equivalents of the means described thus than their combinations if these are performed in the The scope of the following claims.

    Claims (5)

    1. Open and horizontal sales refrigerator cabinet intended for frozen or chilled foodstuffs (5) of the type including a box and a container inside said box for storing said foodstuffs, and a main circuit for cold air flowing into the space defined between the box and the container below and adjacent to the latter and having cold air blowing nozzles so as to form at least one cold air curtain ( R) on the surface of the foodstuffs exposed between two opposing edges of the container, one of said blowing nozzles (9) being placed on one of said edges of cold air, and a pick up point (10) for a portion of the cold air of said curtain ( R ) placed at the level of the edge opposite the one where the blowing nozzles are situated so as to recirculate this portion of cold air in said space, the cold air being blown at such a speed of for example 2 m/secs so that the air flow becomes turbulent, a deflector (D1, D2, D3) for the other portion of the cold air flow of the cold air curtain being provided at the level of the cold air pick up point (10) so as to return this portion of air in the form of a mixed flow of air relatively colder than the ambient air in an opposite direction above said cold air curtain ( R ) and forming a relatively cold intermediate mixed air loop (B) between the cold air curtain and the ambient air.
    2. Cabinet according to claim 1, characterised in that the deflector (D1, D3) has an approximately U-shaped layered section having its opening orientated towards the inside of the cabinet.
    3. Cabinet according to claim 1, characterised in that the deflector (D2) has an flattened approximately C or chistera racket-shaped section having its opening orientated towards the inside of the cabinet.
    4. Cabinet according to one of the preceding claims, characterised in that the upper portion (12) of the deflector is equipped with an internal casing (13) and spaced from the latter, said casing (13) defining with said upper portion (12) of the deflector a diverging channel ( C) or having a section increasing in a direction contrary to the flowing of the cold air flow (R).
    5. Cabinet according to one of the preceding claims, characterised in that the lower portion (10) of the deflector is equipped with a separator (14, 15, 16) so as to separate the flow of air sucked up by the main circuit (6).
    EP96937385A 1995-11-10 1996-10-31 Open horizontal refrigerated display cabinet for frozen or refrigerated food Expired - Lifetime EP0957732B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FR9513359 1995-11-10
    FR9513359A FR2741141B1 (en) 1995-11-10 1995-11-10 HORIZONTAL AND OPEN REFRIGERATED SALES FURNITURE FOR FROZEN OR CHILLED FOOD
    PCT/FR1996/001725 WO1997017003A1 (en) 1995-11-10 1996-10-31 Open horizontal refrigerated display cabinet for frozen or refrigerated food

    Publications (2)

    Publication Number Publication Date
    EP0957732A1 EP0957732A1 (en) 1999-11-24
    EP0957732B1 true EP0957732B1 (en) 2002-08-14

    Family

    ID=9484456

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96937385A Expired - Lifetime EP0957732B1 (en) 1995-11-10 1996-10-31 Open horizontal refrigerated display cabinet for frozen or refrigerated food

    Country Status (4)

    Country Link
    EP (1) EP0957732B1 (en)
    DE (1) DE69623061T2 (en)
    FR (1) FR2741141B1 (en)
    WO (1) WO1997017003A1 (en)

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2786999B1 (en) 1998-12-09 2001-02-23 Nevoret Concept REFRIGERATION SALES FURNITURE
    CN103720244A (en) * 2013-12-19 2014-04-16 大连三洋冷链有限公司 Heat-pump-type cooling-heating display cabinet
    US9861213B2 (en) 2014-11-13 2018-01-09 The Vollrath Company, L.L.C. Forced cold air well with false bottom insert

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR965379A (en) * 1950-09-11
    US2447759A (en) * 1941-10-20 1948-08-24 C V Hill & Company Inc Open top access refrigerated display case
    FR2276545A1 (en) * 1974-06-24 1976-01-23 Linde Ag Open-topped deep freeze container - with ventilator, container sidewall cooling element and cold air curtain vapouriser in transition space(SW-12.1.76)
    US4628697A (en) * 1985-09-20 1986-12-16 Convex Display Systems, Inc. Air-flow temperature and humidity management for maintaining freshness of delicate produce

    Also Published As

    Publication number Publication date
    FR2741141A1 (en) 1997-05-16
    FR2741141B1 (en) 1998-01-02
    DE69623061T2 (en) 2003-03-20
    WO1997017003A1 (en) 1997-05-15
    EP0957732A1 (en) 1999-11-24
    DE69623061D1 (en) 2002-09-19

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