EP1584876A1 - Food serving trolley carrying a double amount of cooling material - Google Patents

Food serving trolley carrying a double amount of cooling material Download PDF

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Publication number
EP1584876A1
EP1584876A1 EP05356061A EP05356061A EP1584876A1 EP 1584876 A1 EP1584876 A1 EP 1584876A1 EP 05356061 A EP05356061 A EP 05356061A EP 05356061 A EP05356061 A EP 05356061A EP 1584876 A1 EP1584876 A1 EP 1584876A1
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EP
European Patent Office
Prior art keywords
compartment
wall
tank
delimiting
trolley according
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Granted
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EP05356061A
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German (de)
French (fr)
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EP1584876B1 (en
Inventor
Pierre Brossat
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Electro Alu
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Electro Alu
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    • 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
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/12—Devices using other cold materials; Devices using cold-storage bodies using solidified gases, e.g. carbon-dioxide snow
    • F25D3/125—Movable containers
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/38—Refrigerating devices characterised by wheels

Definitions

  • the present invention relates to the technical field of transport and distribution of meals using trays on which are placed dishes and various utensils necessary for the consumption of food.
  • the object of the invention finds a particularly advantageous application in the field of transport and distribution of meals, particularly in hospital.
  • a meal tray is intended to receive food cold and hot placed in containers adapted to the nature of food.
  • the hot dishes are, as soon as they are prepared, conveyed and kept at the temperature of consumption until the moment of their distribution to the consumer.
  • the hot dishes are set to consumption temperature just before their distribution to the consumer, in the as they were rapidly cooled as soon as they were prepared, with a view to cold storage for up to several days.
  • trolleys allowing the transport and distribution of meal trays.
  • a trolley of transport and distribution includes, for example, as illustrated by the US-A-3,975,393, two separate compartments, one of which is intended to receive trays provided with utensils and cold dishes, while the other receives the containers containing hot food.
  • the so-called hot compartment is equipped with means of heating to place and maintain foodstuffs at their consumption temperature.
  • the so-called cold compartment is connected to a unit on-board refrigeration system, generally comprising a compressor unit, a condenser and an evaporator.
  • Such trolleys have the disadvantage of being particularly bulky, heavy and expensive because, in particular, of the assembly of a production unit of cold inside each trolley.
  • the patent application EP 0 161 178 a proposed an installation with a fixed terminal for the production of cooling and hot and on which is intended to be connected at least one isothermal trolley of transport and distribution of meals.
  • the fixed terminal has a compartment including a source of cold air that can pulsate the air inside the cold compartment of the truck, when it is attached to the production terminal. If such an installation avoids boarding the refrigeration unit on each of the trolleys, it must be considered that such an installation does not allow the maintenance of the cold compartment of the cart at a given temperature for a period relatively long, after disconnecting the trolley from the power terminal.
  • Patent FR 2 068 042 has proposed an installation to ensure the carts cooling comprising a device for dispensing a fluid refrigerant mounted in a stationary position and comprising a circuit for supplying a fluid refrigerant cooled by a refrigerating unit.
  • the fluid supply circuit refrigerant is equipped with a controlled circulator and at least one pair of fittings intended to be connected to the inlet and outlet connections of a fluid accumulator refrigerant equipping a trolley.
  • Such an installation offers the advantage of having trolleys presenting a limited weight, since the refrigerating unit is not loaded on each of the trolleys, while offering a good autonomy by keeping the dishes placed at inside the truck at a set cold temperature for a period determined.
  • it appears that such a facility is relatively expensive because of the cooling capacity required to allow the cooling of a fleet of carts.
  • the carriage comprises at least one closed container containing statically the refrigerant and interposed between the receiving tray and a compartment to play the role of thermal buffer.
  • the closed reservoir comprises a wall delimiting at least a portion of the receiving pan and a diffusion wall opposite delimiting at least a portion of the compartment.
  • the carriage comprises two reservoirs defining on one side between them a common CO 2 receiving tank, the other side of each of the tanks delimiting a portion of the height of a compartment.
  • the wall delimiting the receiving tray extends substantially horizontally at the top of the carriage, the diffusion wall forming at least a portion of the top wall of the compartment.
  • the diffusion wall also extends vertically to form at least a portion of the vertical wall of the compartment.
  • each tank contains in as coolant, brine.
  • the carriage comprises a solid CO 2 receiving tray in the form of pads or snow.
  • such a solid CO 2 receiving pan is equipped with a means for adjusting the sublimation of solid CO 2 .
  • Fig. 1 is a schematic elevation showing an embodiment of an isothermal carriage according to the invention.
  • Fig. 2 is a sectional view taken substantially along lines AA of FIG. 1.
  • each carriage 1 comprises an insulating envelope 2 whose internal volume is accessible by at least one door 3 .
  • This insulating envelope 2 internally delimits at least one, and in the illustrated example, two closed compartments 5 each accessible by a door 3 and each provided internally with support means 6 to maintain superimposed meal trays.
  • each compartment 5 comprises a so-called cold part and a so-called hot part.
  • each so-called hot part is provided with means for reheating the meal trays.
  • each carriage 1 is equipped with rolling means 7.
  • carriages 1 will not be described in more detail to the extent that they are well known in the state of the art. It is to be considered that the object of the invention applies to any type of trolley for storing and transporting meal trays having at least one compartment with at least one cold part and at least one hot part.
  • the carriage 1 is provided with cold generating means 10 comprising at least one, and in the illustrated example, two closed tanks or accumulators 11 containing a refrigerant and mounted inside the casing 2.
  • Each closed tank 11 thus contains the refrigerant fluid statically.
  • each closed tank 11 contains, as static coolant, brine.
  • the closed tanks 11 are designed to provide cold in each compartment 5.
  • each closed tank 11 has a wall 11 1 of diffusion delimiting at least a portion of a closed compartment 5.
  • each closed reservoir 11 extends over substantially the entire height of a compartment 5.
  • the diffusion wall 11 1 constitutes a wall portion of the compartment 5 or as in the example illustrated, a wall vertical compartment 5.
  • each closed tank 11 delimits at least in part a tank 14 for receiving CO 2 for example solid or dry ice having a loading opening 16 provided with shutter means not shown, such as a lid.
  • the two closed tanks 11 are placed in such a way that their two walls 11 2 facing each other opposite the diffusion walls 11 1 delimit the common reception tank 14.
  • the two closed tanks 11 are mounted substantially parallel to each other being spaced apart to define the receiving tank 14.
  • the two closed tanks 11 and the tray 14 receiving are arranged to form a kind of partition median inside the carriage separating the two compartments 5.
  • the receiving tray 14 opens on the upper face of the carriage so as to allow solid CO 2 filling of the tray 14.
  • the filling of the receiving tray 14 can be achieved at a different place and by any appropriate means.
  • the tray 14 may be provided with a opening or a CO 2 loading port, equipped with injection means of all types such as cannula or gun.
  • dual-stage or double-expansion cooling means allows a better control of the temperature inside the compartments 5 while limiting the consumption of CO 2 .
  • a closed tank 11 is interposed between a compartment 5 and the tank 14 so that each closed tank 11 acts as a heat buffer especially for the CO 2 loading of the tank 14 thus avoiding a fall in the temperature of the compartments to negative values.
  • the solid CO 2 receiving pan 14 can be equipped with a means for controlling the sublimation of the solid CO 2 , for example, by a supply of calories.
  • the receiving tray 14 is located at the top of the carriage.
  • the wall 11 2 common between the receiving tray 14 and the reservoir extends substantially horizontally to the upper part of the carriage.
  • the diffusion wall 11 1 thus forms part or all of the top wall of the compartment 5.
  • the diffusion wall 11 1 can also extend vertically to form part or all of the vertical wall of one or more compartments 5.
  • the reservoir 5 extends both at the top wall of the compartment 5 and a vertical wall of said compartment 5.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Warehouses Or Storage Devices (AREA)

Abstract

The cart has an insulating case (2) accessible through a door and delimiting a compartment (5) equipped with a support (6), in superposed position of a meal tray. A chillness producing unit (10) produces chillness at the interior of the compartment and includes a closed container (11) having cooling medium e.g. glycol water. The container delimits a solid carbon dioxide reception bag (14) having a sprue equipped with an obturation unit.

Description

La présente invention concerne le domaine technique du transport et de la distribution de repas à l'aide de plateaux sur lesquels sont disposés des mets et divers ustensiles nécessaires à la consommation des aliments.The present invention relates to the technical field of transport and distribution of meals using trays on which are placed dishes and various utensils necessary for the consumption of food.

L'objet de l'invention trouve une application particulièrement avantageuse dans le domaine du transport et de la distribution de repas notamment en milieu hospitalier.The object of the invention finds a particularly advantageous application in the field of transport and distribution of meals, particularly in hospital.

D'une manière habituelle, un plateau-repas est destiné à recevoir des mets froids et chauds placés dans des récipients adaptés à la nature des aliments. Selon le procédé dit en liaison chaude, les mets chauds sont, dès leur préparation, acheminés et conservés à la température de consommation jusqu'au moment de leur distribution au consommateur. Dans le procédé dit en liaison froide, les mets chauds sont mis à la température de consommation juste avant leur distribution au consommateur, dans la mesure où ils ont été rapidement refroidis dès la fin de leur préparation, en vue d'un stockage au froid pouvant atteindre plusieurs jours.In a usual way, a meal tray is intended to receive food cold and hot placed in containers adapted to the nature of food. According to a process known as a hot link, the hot dishes are, as soon as they are prepared, conveyed and kept at the temperature of consumption until the moment of their distribution to the consumer. In the so-called cold-binding process, the hot dishes are set to consumption temperature just before their distribution to the consumer, in the as they were rapidly cooled as soon as they were prepared, with a view to cold storage for up to several days.

Il est connu dans l'art antérieur différentes solutions de chariots permettant le transport et la distribution de plateaux-repas. D'une manière générale, un tel chariot de transport et de distribution comporte, par exemple, comme illustré par le brevet US-A-3 975 393, deux compartiments séparés, dont l'un est destiné à recevoir les plateaux pourvus des ustensiles et des mets froids, tandis que l'autre reçoit les récipients contenant les mets chauds. Le compartiment dit chaud est équipé de moyens de chauffage permettant de placer et de maintenir les denrées à leur température de consommation. Le compartiment dit froid est relié à une unité frigorifique embarquée, comportant généralement un groupe compresseur, un condenseur et un évaporateur.It is known in the prior art different solutions of trolleys allowing the transport and distribution of meal trays. In general, such a trolley of transport and distribution includes, for example, as illustrated by the US-A-3,975,393, two separate compartments, one of which is intended to receive trays provided with utensils and cold dishes, while the other receives the containers containing hot food. The so-called hot compartment is equipped with means of heating to place and maintain foodstuffs at their consumption temperature. The so-called cold compartment is connected to a unit on-board refrigeration system, generally comprising a compressor unit, a condenser and an evaporator.

De tels chariots présentent l'inconvénient d'être particulièrement encombrants, lourds et coûteux en raison, notamment, du montage d'une unité de production de froid à l'intérieur de chaque chariot.Such trolleys have the disadvantage of being particularly bulky, heavy and expensive because, in particular, of the assembly of a production unit of cold inside each trolley.

Pour tenter de résoudre ce problème, la demande de brevet EP 0 161 178 a proposé une installation comportant une borne fixe de production de froid et de chaud et sur laquelle est destiné à être raccordé au moins un chariot isotherme de transport et de distribution de repas. La borne fixe comporte un compartiment incluant une source d'air froid susceptible de pulser l'air à l'intérieur du compartiment froid du chariot, lorsque ce dernier est accolé à la borne de production. Si une telle installation évite d'embarquer l'unité frigorifique sur chacun des chariots, il doit être considéré qu'une telle installation ne permet pas de maintenir le compartiment froid du chariot à une température donnée pendant une durée relativement longue, après le débranchement du chariot de la borne d'alimentation.In an attempt to solve this problem, the patent application EP 0 161 178 a proposed an installation with a fixed terminal for the production of cooling and hot and on which is intended to be connected at least one isothermal trolley of transport and distribution of meals. The fixed terminal has a compartment including a source of cold air that can pulsate the air inside the cold compartment of the truck, when it is attached to the production terminal. If such an installation avoids boarding the refrigeration unit on each of the trolleys, it must be considered that such an installation does not allow the maintenance of the cold compartment of the cart at a given temperature for a period relatively long, after disconnecting the trolley from the power terminal.

Le brevet FR 2 068 042 a proposé une installation pour assurer le refroidissement de chariots comportant un appareil de distribution d'un fluide réfrigérant monté à poste fixe et comportant un circuit de fourniture d'un fluide réfrigérant refroidi par une unité frigorifique. Le circuit de fourniture en fluide réfrigérant est équipé d'un circulateur commandé et d'au moins une paire de raccords destinés à être reliés aux raccords d'entrée et de sortie d'un accumulateur de fluide réfrigérant équipant un chariot.Patent FR 2 068 042 has proposed an installation to ensure the carts cooling comprising a device for dispensing a fluid refrigerant mounted in a stationary position and comprising a circuit for supplying a fluid refrigerant cooled by a refrigerating unit. The fluid supply circuit refrigerant is equipped with a controlled circulator and at least one pair of fittings intended to be connected to the inlet and outlet connections of a fluid accumulator refrigerant equipping a trolley.

Une telle installation offre l'avantage de disposer de chariots présentant un poids limité, puisque l'unité frigorifique n'est pas embarquée sur chacun des chariots, tout en offrant une bonne autonomie en maintenant les mets placés à l'intérieur du chariot à une température froide de consigne pendant une durée déterminée. Toutefois, il apparaít qu'une telle installation est relativement coûteuse en raison de la puissance frigorifique requise pour permettre le refroidissement d'une flotte de chariots.Such an installation offers the advantage of having trolleys presenting a limited weight, since the refrigerating unit is not loaded on each of the trolleys, while offering a good autonomy by keeping the dishes placed at inside the truck at a set cold temperature for a period determined. However, it appears that such a facility is relatively expensive because of the cooling capacity required to allow the cooling of a fleet of carts.

L'objet de l'invention vise à remédier aux inconvénients de l'art antérieur en proposant une nouvelle technique pour laquelle, d'une part, chaque chariot isotherme de transport et de distribution de plateaux-repas embarque une capacité de froid autonome suffisante pour assurer son maintien à une température froide pendant une durée relativement longue, et d'autre part, la puissance frigorifique nécessaire au refroidissement d'une flotte de chariots est diminuée par rapport aux solutions connues.
L'objet de l'invention vise à proposer un nouveau chariot isotherme comportant :

  • une enveloppe isolante accessible par au moins une porte et délimitant au moins un compartiment fermé muni intérieurement de moyens de support en position superposée de plateaux-repas,
  • des moyens de production de froid à l'intérieur du compartiment comportant au moins un bac de réception de CO2 adapté pour refroidir un fluide réfrigérant,
  • et des moyens de remise en température des plateaux-repas.
The object of the invention is to overcome the drawbacks of the prior art by proposing a new technique for which, on the one hand, each isothermal trolley of transport and distribution meal trays embeds an autonomous cold capacity sufficient for maintain it at a cold temperature for a relatively long period, and secondly, the cooling capacity necessary for cooling a fleet of trucks is reduced compared to known solutions.
The object of the invention is to propose a new isothermal trolley comprising:
  • an insulating envelope accessible by at least one door and delimiting at least one closed compartment provided internally with support means in superimposed position of meal trays,
  • means for generating cold inside the compartment comprising at least one CO 2 receiving tank adapted to cool a refrigerant,
  • and means for reheating the meal trays.

Selon l'invention, le chariot comporte au moins un réservoir fermé contenant statiquement le fluide réfrigérant et interposé entre le bac de réception et un compartiment pour jouer le rôle de tampon thermique.According to the invention, the carriage comprises at least one closed container containing statically the refrigerant and interposed between the receiving tray and a compartment to play the role of thermal buffer.

Selon une caractéristique préférée de réalisation, le réservoir fermé comporte une paroi délimitant au moins une partie du bac de réception et une paroi de diffusion opposée délimitant au moins une partie du compartiment.According to a preferred embodiment, the closed reservoir comprises a wall delimiting at least a portion of the receiving pan and a diffusion wall opposite delimiting at least a portion of the compartment.

Selon un autre exemple de réalisation, le chariot comporte deux réservoirs délimitant d'un côté entre eux un bac commun de réception de CO2, l'autre côté de chacun des réservoirs délimitant une partie de la hauteur d'un compartiment.According to another exemplary embodiment, the carriage comprises two reservoirs defining on one side between them a common CO 2 receiving tank, the other side of each of the tanks delimiting a portion of the height of a compartment.

Selon une variante de réalisation, la paroi délimitant le bac de réception s'étend sensiblement horizontalement à la partie supérieure du chariot, la paroi de diffusion formant au moins une partie de la paroi de dessus du compartiment.According to an alternative embodiment, the wall delimiting the receiving tray extends substantially horizontally at the top of the carriage, the diffusion wall forming at least a portion of the top wall of the compartment.

Selon une autre forme de réalisation, la paroi de diffusion s'étend aussi verticalement pour former au moins une partie de la paroi verticale du compartiment.According to another embodiment, the diffusion wall also extends vertically to form at least a portion of the vertical wall of the compartment.

Selon une caractéristique préférée de réalisation, chaque réservoir contient en tant que fluide réfrigérant, de l'eau glycolée.According to a preferred embodiment, each tank contains in as coolant, brine.

Selon une autre caractéristique préférée de réalisation, le chariot comporte un bac de réception de CO2 solide sous forme de plaquettes ou de neige.According to another preferred embodiment, the carriage comprises a solid CO 2 receiving tray in the form of pads or snow.

De préférence, un tel bac de réception de CO2 solide est équipé d'un moyen de réglage de la sublimation du CO2 solide.Preferably, such a solid CO 2 receiving pan is equipped with a means for adjusting the sublimation of solid CO 2 .

Diverses autres caractéristiques ressortent de la description faite ci-dessous en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, des formes de réalisation de l'objet de l'invention.Various other features are apparent from the description given below in reference to the accompanying drawings which show, by way of non-limiting examples, embodiments of the subject of the invention.

La fig. 1 est une vue en élévation schématique montrant un exemple de réalisation d'un chariot isotherme conforme à l'invention. Fig. 1 is a schematic elevation showing an embodiment of an isothermal carriage according to the invention.

La fig. 2 est une vue en coupe prise sensiblement selon les lignes A-A de la fig. 1. Fig. 2 is a sectional view taken substantially along lines AA of FIG. 1.

Tel que cela ressort plus précisément des figures, l'objet de l'invention vise un chariot isotherme 1 destiné à assurer le stockage et le transport de plateaux-repas non représentés, en position superposée. Classiquement, chaque chariot 1 comporte une enveloppe isolante 2 dont le volume interne est accessible par au moins une porte 3. Cette enveloppe isolante 2 délimite intérieurement au moins un, et dans l'exemple illustré, deux compartiments fermés 5 accessibles chacun par une porte 3 et munis chacun intérieurement de moyens de support 6 permettant de maintenir en position superposée des plateaux-repas. De manière classique, chaque compartiment 5 comporte une partie dite froide et une partie dite chaude. A cet effet et de manière classique, chaque partie dite chaude est munie de moyens de remise en température des plateaux- repas. De tels moyens de remise en température ne sont pas décrits plus précisément car ils ne font pas partie de l'invention et sont bien connus de l'Homme du Métier. Bien entendu, les parties dites chaudes et froides sont destinées à recevoir respectivement les mets chauds et froids des plateaux-repas. D'une manière classique, chaque chariot 1 est équipé de moyens de roulement 7.As is more specifically apparent from the figures, the object of the invention is an isothermal trolley 1 for storing and transporting unrepresented meal trays in superimposed position. Conventionally, each carriage 1 comprises an insulating envelope 2 whose internal volume is accessible by at least one door 3 . This insulating envelope 2 internally delimits at least one, and in the illustrated example, two closed compartments 5 each accessible by a door 3 and each provided internally with support means 6 to maintain superimposed meal trays. In a conventional manner, each compartment 5 comprises a so-called cold part and a so-called hot part. For this purpose and in a conventional manner, each so-called hot part is provided with means for reheating the meal trays. Such reheating means are not described more precisely because they are not part of the invention and are well known to those skilled in the art. Of course, the so-called hot and cold parts are intended to respectively receive hot and cold dishes meal trays. In a conventional manner, each carriage 1 is equipped with rolling means 7.

Il est à noter que les chariots 1 ne seront pas décrits de manière plus détaillée dans la mesure où ils sont bien connus de l'état de la technique. Il est à considérer que l'objet de l'invention s'applique à tout type de chariot de stockage et de transport de plateaux-repas comportant au moins un compartiment avec au moins une partie froide et au moins une partie chaude.It should be noted that the carriages 1 will not be described in more detail to the extent that they are well known in the state of the art. It is to be considered that the object of the invention applies to any type of trolley for storing and transporting meal trays having at least one compartment with at least one cold part and at least one hot part.

Conformément à l'invention, le chariot 1 est pourvu de moyens de production de froid 10 comportant au moins un, et dans l'exemple illustré, deux réservoirs ou accumulateurs fermés 11 contenant un fluide réfrigérant et montés à l'intérieur de l'enveloppe isolante 2. Chaque réservoir fermé 11 contient ainsi de manière statique le fluide réfrigérant. De préférence, chaque réservoir fermé 11 contient en tant que fluide réfrigérant statique, de l'eau glycolée. Les réservoirs fermés 11 sont conçus de manière à fournir du froid dans chaque compartiment 5. A cet effet, chaque réservoir fermé 11 présente une paroi 11 1 de diffusion délimitant au moins une partie d'un compartiment fermé 5. Dans l'exemple de réalisation illustré, chaque réservoir fermé 11 s'étend sur pratiquement toute la hauteur d'un compartiment 5. En d'autres termes, la paroi de diffusion 11 1 constitue une partie de paroi du compartiment 5 ou comme dans l'exemple illustré, une paroi verticale du compartiment 5. According to the invention, the carriage 1 is provided with cold generating means 10 comprising at least one, and in the illustrated example, two closed tanks or accumulators 11 containing a refrigerant and mounted inside the casing 2. Each closed tank 11 thus contains the refrigerant fluid statically. Preferably, each closed tank 11 contains, as static coolant, brine. The closed tanks 11 are designed to provide cold in each compartment 5. For this purpose, each closed tank 11 has a wall 11 1 of diffusion delimiting at least a portion of a closed compartment 5. In the embodiment example illustrated, each closed reservoir 11 extends over substantially the entire height of a compartment 5. In other words, the diffusion wall 11 1 constitutes a wall portion of the compartment 5 or as in the example illustrated, a wall vertical compartment 5.

Selon une autre caractéristique de l'invention, chaque réservoir fermé 11 délimite au moins en partie un bac 14 de réception de CO2 par exemple solide ou de carboglace présentant une ouverture de chargement 16 munie de moyens d'obturation non représentés, tels qu'un couvercle. Dans l'exemple de réalisation, les deux réservoirs fermés 11 sont placés de manière que leurs deux parois 11 2 en vis-à-vis opposés aux parois de diffusion 11 1 délimitent le bac commun de réception 14. Selon cette variante de réalisation, les deux réservoirs fermés 11 sont montés sensiblement parallèles l'un à l'autre en étant écartés pour délimiter le bac de réception 14. De préférence, les deux réservoirs fermés 11 et le bac 14 de réception sont disposés de manière à constituer une sorte de cloison médiane à l'intérieur du chariot séparant les deux compartiments 5. Selon l'exemple illustré, le bac de réception 14 s'ouvre sur la face supérieure du chariot de manière à permettre le remplissage en CO2 solide du bac 14. Bien entendu, le remplissage du bac de réception 14 peut être réalisé à un endroit différent et par tous moyens appropriés. Ainsi, le bac 14 peut être muni d'une ouverture ou d'un orifice de chargement en CO2, équipé de moyens d'injection de tous types tels que canule ou pistolet.According to another characteristic of the invention, each closed tank 11 delimits at least in part a tank 14 for receiving CO 2 for example solid or dry ice having a loading opening 16 provided with shutter means not shown, such as a lid. In the exemplary embodiment, the two closed tanks 11 are placed in such a way that their two walls 11 2 facing each other opposite the diffusion walls 11 1 delimit the common reception tank 14. According to this variant embodiment, the two closed tanks 11 are mounted substantially parallel to each other being spaced apart to define the receiving tank 14. Preferably, the two closed tanks 11 and the tray 14 receiving are arranged to form a kind of partition median inside the carriage separating the two compartments 5. According to the illustrated example, the receiving tray 14 opens on the upper face of the carriage so as to allow solid CO 2 filling of the tray 14. Of course, the filling of the receiving tray 14 can be achieved at a different place and by any appropriate means. Thus, the tray 14 may be provided with a opening or a CO 2 loading port, equipped with injection means of all types such as cannula or gun.

Il est à noter que le rechargement en froid d'un tel chariot est relativement aisé et rapide, dans la mesure où il suffit de remplir le bac 14 de CO2 sous la forme de plaquettes ou de neige par exemple. La présence de CO2 dans le bac 14 conduit au refroidissement des réservoirs fermés de fluide réfrigérant 11. Lorsque le CO2 solide est sublimé, les réservoirs fermés 11 assurent ensuite le maintien du froid à l'intérieur des compartiments 5.It should be noted that the cold refilling of such a carriage is relatively easy and fast, insofar as it suffices to fill the tray 14 of CO 2 in the form of chips or snow for example. The presence of CO 2 in the tank 14 leads to the cooling of the closed refrigerant tanks 11. When the solid CO 2 is sublimed, the closed tanks 11 then maintain the cold inside the compartments 5 .

La mise en oeuvre de moyens de production de froid à double étage ou double détente permet une meilleure maítrise de la température à l'intérieur des compartiments 5 tout en limitant la consommation en CO2. Par ailleurs, un réservoir fermé 11 se trouve interposé entre un compartiment 5 et le bac 14 de sorte que chaque réservoir fermé 11 joue le rôle de tampon thermique lors notamment du chargement en CO2 du bac 14 évitant ainsi une descente de la température des compartiments à des valeurs négatives.The implementation of dual-stage or double-expansion cooling means allows a better control of the temperature inside the compartments 5 while limiting the consumption of CO 2 . Furthermore, a closed tank 11 is interposed between a compartment 5 and the tank 14 so that each closed tank 11 acts as a heat buffer especially for the CO 2 loading of the tank 14 thus avoiding a fall in the temperature of the compartments to negative values.

Il est à noter que le bac de réception 14 de CO2 solide peut être équipé d'un moyen de réglage de la sublimation du CO2 solide, par exemple, par un apport de calories.It should be noted that the solid CO 2 receiving pan 14 can be equipped with a means for controlling the sublimation of the solid CO 2 , for example, by a supply of calories.

De même, il peut être prévu de réaliser de manière différente les moyens de production du froid. Ainsi, il peut être prévu que le bac de réception 14 soit situé à la partie supérieure du chariot. A cet égard, la paroi 11 2 commune entre le bac de réception 14 et le réservoir, s'étend sensiblement de manière horizontale à la partie supérieure du chariot. Par suite, la paroi de diffusion 11 1 forme ainsi, une partie ou la totalité de la paroi de dessus du compartiment 5. Selon cette dernière forme de réalisation, il est à noter que la paroi de diffusion 11 1 peut aussi s'étendre verticalement pour former une partie ou la totalité de la paroi verticale d'un ou des compartiments 5. Ainsi, le réservoir 5 s'étend à la fois au niveau de la paroi de dessus du compartiment 5 et d'une paroi verticale dudit compartiment 5. Similarly, it can be expected to achieve different ways of producing cold. Thus, it can be expected that the receiving tray 14 is located at the top of the carriage. In this regard, the wall 11 2 common between the receiving tray 14 and the reservoir, extends substantially horizontally to the upper part of the carriage. As a result, the diffusion wall 11 1 thus forms part or all of the top wall of the compartment 5. According to this latter embodiment, it should be noted that the diffusion wall 11 1 can also extend vertically to form part or all of the vertical wall of one or more compartments 5. Thus, the reservoir 5 extends both at the top wall of the compartment 5 and a vertical wall of said compartment 5.

L'invention n'est pas limitée aux exemples décrits et représentés car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the examples described and shown because various changes can be made without departing from its scope.

Claims (8)

Chariot isotherme comportant : une enveloppe isolante (2) accessible par au moins une porte (3) et délimitant au moins un compartiment fermé (5) muni intérieurement de moyens (6) de support en position superposée de plateaux-repas, des moyens (10) de production de froid à l'intérieur du compartiment comportant au moins un bac de réception de CO2, adapté pour refroidir un fluide réfrigérant, et des moyens de remise en température des plateaux-repas,    caractérisé en ce qu'il comporte au moins un réservoir fermé (11) contenant statiquement le fluide réfrigérant et interposé entre le bac de réception (14) et un compartiment (5) pour jouer le rôle de tampon thermique.Isothermal cart with: an insulating envelope (2) accessible by at least one door (3) and delimiting at least one closed compartment (5) internally provided with support means (6) in a superimposed position of meal trays, means (10) for producing cold inside the compartment comprising at least one CO 2 receiving tank, adapted to cool a refrigerant, and means for reheating the meal trays, characterized in that it comprises at least one closed reservoir (11) statically containing the refrigerant fluid and interposed between the receiving tank (14) and a compartment (5) to act as a thermal buffer. Chariot isotherme selon la revendication 1, caractérisé en ce qu'un réservoir fermé (11) comporte une paroi (11 2 ) délimitant au moins une partie du bac (14) de réception et une paroi de diffusion (11 1 ) opposée délimitant au moins une partie du compartiment (5). Isothermal trolley according to claim 1, characterized in that a closed reservoir (11) has a wall (11 2 ) delimiting at least a portion of the receiving tank (14) and an opposite diffusion wall (11 1 ) delimiting at least part of the compartment (5). Chariot isotherme selon la revendication 1 ou 2, caractérisé en ce qu'il comporte deux réservoirs (11) délimitant d'un côté, entre eux, un bac commun de réception (14) de CO2, l'autre côté de chacun des réservoirs (11) délimitant une partie de la hauteur du compartiment (5). Isothermal trolley according to claim 1 or 2, characterized in that it comprises two tanks (11) delimiting on one side, between them, a common receiving tank (14) CO 2 , the other side of each of the tanks (11) delimiting part of the height of the compartment (5). Chariot isotherme selon la revendication 2, caractérisé en ce que la paroi (11 2 ) délimitant le bac (14) de réception s'étend sensiblement horizontalement à la partie supérieure du chariot, la paroi de diffusion (11 1 ) formant au moins une partie de la paroi de dessus du compartiment.Isothermal trolley according to claim 2, characterized in that the wall (11 2 ) defining the receiving tray (14) extends substantially horizontally to the upper part of the carriage, the diffusion wall (11 1 ) forming at least a part from the top wall of the compartment. Chariot isotherme selon la revendication 4, caractérisé en ce que la paroi de diffusion (11 1 ) s'étend aussi verticalement pour former au moins une partie de la paroi verticale du compartiment.Isothermal trolley according to claim 4, characterized in that the diffusion wall (11 1 ) also extends vertically to form at least a portion of the vertical wall of the compartment. Chariot isotherme selon l'une des revendications 1 à 3, caractérisé en ce que chaque réservoir (11) contient de l'eau glycolée.Isothermal trolley according to one of claims 1 to 3, characterized in that each tank ( 11 ) contains brine. Chariot isotherme selon l'une des revendications 1 à 3, caractérisé en ce qu'il comporte un bac (14) de réception de CO2 solide sous forme de plaquettes ou de neige. Isothermal trolley according to one of claims 1 to 3, characterized in that it comprises a tank (14) solid CO 2 receiving platelets or snow. Chariot isotherme selon l'une des revendications 1 à 3, caractérisé en ce que le bac (14) de réception de CO2 solide est équipé d'un moyen de réglage de la sublimation du CO2 solide.Isothermal trolley according to one of claims 1 to 3, characterized in that the tank (14) for receiving solid CO 2 is equipped with a means for adjusting the sublimation of solid CO 2 .
EP20050356061 2004-04-07 2005-04-07 Food serving trolley carrying a double amount of cooling material Active EP1584876B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0403634A FR2868670B1 (en) 2004-04-07 2004-04-07 TROLLEY FOR DISTRIBUTION OF MEALS EMBARKING A DOUBLE COLD RESERVE
FR0403634 2004-04-07

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EP1584876A1 true EP1584876A1 (en) 2005-10-12
EP1584876B1 EP1584876B1 (en) 2009-11-04

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US11730263B2 (en) 2021-07-02 2023-08-22 Regethermic Canada Inc. System for storing and delivering food trays

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2068042A5 (en) 1969-11-26 1971-08-20 Freez Porter Systems Inc
US3783633A (en) * 1970-08-26 1974-01-08 Liquid Carbonic Corp Co{11 {11 {0 refrigeration system
US3975393A (en) 1974-05-10 1976-08-17 The Dow Chemical Company Certain 2-pyridyl-phosphonamidothioates and derivatives thereof
GB2030277A (en) * 1978-09-27 1980-04-02 Lampard R Container for storage of articles and device for utilization of solid carbon dioxide
EP0161178A1 (en) 1984-04-17 1985-11-13 Michel Hervieu Food service trolleys combined with heating and cooling units

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2068042A5 (en) 1969-11-26 1971-08-20 Freez Porter Systems Inc
US3783633A (en) * 1970-08-26 1974-01-08 Liquid Carbonic Corp Co{11 {11 {0 refrigeration system
US3975393A (en) 1974-05-10 1976-08-17 The Dow Chemical Company Certain 2-pyridyl-phosphonamidothioates and derivatives thereof
GB2030277A (en) * 1978-09-27 1980-04-02 Lampard R Container for storage of articles and device for utilization of solid carbon dioxide
EP0161178A1 (en) 1984-04-17 1985-11-13 Michel Hervieu Food service trolleys combined with heating and cooling units

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FR2868670A1 (en) 2005-10-14
EP1584876B1 (en) 2009-11-04
FR2868670B1 (en) 2008-07-25
DE602005017442D1 (en) 2009-12-17

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