EP2781862A1 - Kühlwagen mit eingebauter Vorrichtung zum Kühlen und Aufrechterhaltung der Kühlung - Google Patents

Kühlwagen mit eingebauter Vorrichtung zum Kühlen und Aufrechterhaltung der Kühlung Download PDF

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Publication number
EP2781862A1
EP2781862A1 EP13305327.2A EP13305327A EP2781862A1 EP 2781862 A1 EP2781862 A1 EP 2781862A1 EP 13305327 A EP13305327 A EP 13305327A EP 2781862 A1 EP2781862 A1 EP 2781862A1
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EP
European Patent Office
Prior art keywords
refrigerant
compartment
cold
mobile trolley
refrigerated
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Withdrawn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
EP13305327.2A
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English (en)
French (fr)
Inventor
François Guillin
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.)
Socamel Technologies
Original Assignee
Socamel Technologies
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 Socamel Technologies filed Critical Socamel Technologies
Priority to EP13305327.2A priority Critical patent/EP2781862A1/de
Publication of EP2781862A1 publication Critical patent/EP2781862A1/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Withdrawn legal-status Critical Current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
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B31/00—Service or tea tables, trolleys, or wagons
    • A47B31/02—Service or tea tables, trolleys, or wagons with heating, cooling or ventilating means
    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B31/00—Service or tea tables, trolleys, or wagons
    • A47B2031/002—Catering trolleys
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/066—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply
    • F25D2317/0665—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply from the top
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
    • F25D2317/0682—Two or more fans

Definitions

  • the present invention relates to the technical field of mobile trolleys used for the storage and distribution of material, such as foodstuffs, for example placed on a meal tray, or in crates, or other, to cool or heat.
  • the invention relates more specifically to the cooling of the material stored in a carriage.
  • such a carriage consists of a generally parallelepiped shaped structure provided with a door in its front wall and delimiting at least one refrigerating compartment dedicated to the storage of the material to be cooled or kept cold.
  • the documents WO 2008/24545 and GB 2,424,476 for example, a solution where a fixed cooling dock can cool the truck when it is placed near or against the dock.
  • the dock cooling system includes a heat exchanger with coolant, and at least one fan for circulating cold airflow through the walls of the dock located near or against the cart. The latter is then cooled when it is placed in this cold "environment" created by the dock.
  • This solution therefore allows a distribution of cold in the structure of the carriage, regardless of its location.
  • the cold however remains trapped in the walls, and temperature differences remain inside the compartment to be cooled, the temperature is not homogeneous.
  • the natural convective circulation is very slow, thus preventing optimal transfer of the cold gas to the ends of the walls of the carriage distal of the storage tank of dry ice.
  • the present invention proposes to overcome the aforementioned drawbacks, by proposing a cooling and cold keeping device which is linked to the carriage and therefore displaceable with it, which also allows a dynamic and homogeneous distribution of cold within the carriage, offering finally a dynamic regulation of the cold.
  • the device of the invention also has a large operating autonomy.
  • the main feature of the invention is that said cold guiding means comprise homogenous cold distribution means within the compartment to be refrigerated.
  • the heart of the invention lies in the fact that the cold is now diffused directly into the volume of the compartment to be refrigerated, and more only in the walls defining the volume of the compartment to be refrigerated.
  • the cold is diffused homogeneously throughout the volume of the compartment to be refrigerated, in order to avoid temperature differences that were found in the solutions of the prior art at certain levels of the compartment to be refrigerated.
  • said cold guiding means consist of a vertical-looking chimney placed over the entire height of the compartment to be refrigerated and opening into the refrigerant compartment, and said means of homogeneous distribution of the cold consist of multiple openings of distribution of the cold practiced on the chimney along its height within the compartment to be refrigerated.
  • the cold from the refrigerant compartment is guided into this chimney and is evenly distributed over all levels of the refrigerator compartment.
  • connection means to an external refrigerant supply consist of a guiding and centering duct projecting from the refrigerant compartment and designed to receive an external supply line of liquid refrigerant under pressure, the injection then the expansion refrigerant liquid forming refrigerant snow and refrigerant vapor within the refrigerant compartment.
  • said cooling and cold keeping device also comprises means for distributing the refrigerant within the refrigerant compartment.
  • the refrigerant distribution means consist of a distribution comb where, in each passage between two adjacent arms of the comb or between a wall of the refrigerant compartment and the arm of the proximal comb of the latter, circulates and expands refrigerant liquid injected at the entrance of the truck which partly transforms into snow of refrigerant and partly into vapor of refrigerant within the refrigerant compartment.
  • This distribution is advantageous in the subsequent production of cold, carried out in a conventional manner by the gradual transformation of the refrigerant snow sublimate coolant resulting from the heat exchange effected by a flow of air.
  • the fact that the snow is distributed throughout the refrigerant compartment makes it possible to offer a greater heat exchange surface with the air coming from the compartment to be refrigerated, and thus to permanently and optimally create the sublimate of refrigerant, that is to say cold air, which will then be guided in the diffusion chimney and then distributed in the compartment to be refrigerated.
  • Another advantageous way of offering a greater heat exchange surface with the air of the compartment to be refrigerated is to provide the external surface of the refrigerant compartment with heat exchange fins extending towards the compartment to be refrigerated.
  • the refrigerant which cools the walls of the coolant compartment also cools the fins by thermal conduction.
  • These fins have a large heat exchange surface with the air of the compartment to be refrigerated, in addition to the surface of the walls of the refrigerant compartment.
  • the fins can be of any shape.
  • the cooling means in the refrigerant compartment consist of a somehowlic means creating an air circulation loop, sucking air from the compartment to be refrigerated and directing it to the refrigerant snow in the refrigerant compartment, then transferring this refrigerant vapor and coolant sublimate air to the chimney channels for distribution in the refrigerated compartment. Steam and sublimate refrigerant form cold air, which then cools the products stored in the compartment to be refrigerated.
  • These aeration means consist of electrical and / or pneumatic ventilation means arranged inside the refrigerant compartment.
  • At least one horizontally-shaped separation grid is disposed within the refrigerant compartment delimiting a lower refrigerant snow storage zone and an upper zone where the channels open to suck the vapor and the refrigerant sublimate. and where are the ventilation means sucking the air from the refrigerating compartment arriving from above the refrigerant compartment.
  • This grid is thus a very fine mesh filter that holds the snow and prevents clogging of the channels.
  • said lower zone of the refrigerant compartment comprises a partition of vertical shape delimiting with two adjacent walls of the compartment a confined injection zone of the liquid refrigerant, the injection pressure of the liquid refrigerant being able to redirect part of the refrigerant liquid and coolant snow to the area on the other side of said partition, opposite said confined injection zone.
  • This partition consists of a piece of sheet metal for example. Indeed, during the injection, the pressure of the liquid refrigerant is so important (20 bar) that it generates gas velocities preventing, by expulsion, any snow formation in a nearby perimeter. The confinement of this injection zone thus makes it possible to increase the surface / volume occupied by the snow in the rest of the compartment. The surface of this injection zone can be variable.
  • the mobile carriage comprises cooling control means for servocontrolling the aeration means to a selected set temperature for the compartment to be refrigerated.
  • the electrical and / or pneumatic ventilation means are therefore activated or deactivated according to the cold requirement of the compartment to be cooled.
  • the refrigerant vapor created during the injection and expansion of the liquid refrigerant under pressure and then distributed in the compartment to be refrigerated, must be recovered to ensure the safety of the user. Indeed, this CO vapor is a danger because it presents both a risk of toxicity and a risk of asphyxiation from certain thresholds of concentration in the ambient air. It is therefore necessary to evacuate.
  • the compartment to be refrigerated is provided with a pipe for discharging refrigerant vapor to the outside of the truck. Therefore, the present invention allows both the use of refrigerant vapor for cooling the compartment to be refrigerated, and then recovering the same refrigerant vapor to be evacuated outside the compartment safely.
  • said evacuation pipe surrounds at least a portion of said guide and centering duct. This configuration allows a clean finish of the carriage, with a single hole visible from the outside.
  • the carriage according to the invention may comprise other compartments to be cooled or heated, and other cooling and heating means.
  • FIG. 1 On the view of the figure 1 a carriage (1) according to the invention is shown.
  • This mobile trolley (1) has in the upper part a refrigerant compartment (2), and in the lower part a refrigerating compartment (3).
  • a chimney (4) extends over the entire height of the refrigerating compartment (3), and has multiple cold dispensing apertures (5) for diffusing the cold homogeneously in the refrigerating compartment (3). These openings (5) are separated by a constant pitch over the entire height of the chimney (4), as is also visible in figure 2 .
  • This refrigerant compartment (2) comprises a guiding and centering duct (8), intended to accommodate an external supply line (9) of liquid refrigerant under pressure.
  • the liquid refrigerant is injected under pressure into a lower zone of the refrigerant compartment (2), inside which it relaxes, and transforms into snow of refrigerant.
  • Vertically straight through channels (10) extending the upper end of the chimney (4) are positioned at a constant pitch along a vertical plane perpendicular to the direction of injection, in the manner of a comb, creating stop blocks alternating with passages to stop or pass the liquid to distribute it evenly throughout the width of the compartment (2), and therefore a fortiori to evenly distribute the snow refrigerant.
  • This phase of injection and expansion of the liquid refrigerant creates a refrigerant vapor which is also found in the refrigerant compartment (2).
  • the sublimate-laden air thus created, and charged with refrigerant vapor created during the injection of the liquid, is then sent, again via the air flow created by the fans (11), to the upper zone through a grid (13) separating it from the lower zone, and towards the open end of the channels (10), then into the chimney (4), then is diffused in the refrigerating compartment (3) via the openings (5).
  • This ventilated cold air thus makes it possible to cool the compartment (3) homogeneously.
  • Said grid (13) is provided with a mesh sufficiently fine to make filter office, holding the snow in the lower zone, and letting the gases pass into the upper zone.
  • the walls of the refrigerating compartment (3) form an outer casing, and the walls of the refrigerant compartment (2) form an inner casing. There is therefore a double envelope system in the carriage (1).
  • the gap (14) between the two envelopes allows air to flow from the refrigerating compartment (3) to the top of the refrigerant compartment (2).
  • the refrigerant snow is contained within the inner envelope, while the vapor and the sublimate of refrigerant are removed from this inner envelope to be diffused in the environment defined by the outer envelope to cool the ambient air within of the compartment to be refrigerated (3).
  • the refrigerant snow consists for example of dry ice.
  • the refrigerant vapor that is in the refrigerating compartment (3) is then discharged and recovered via a discharge pipe (6) connected to an orifice (7) provided for this purpose in the upper part of the refrigerated compartment (3).
  • the diameter of the orifice (7) is dimensioned so as to also accommodate the guide and centering duct (8) with the supply line (9) external liquid refrigerant under pressure.
  • the supply line (9) external liquid refrigerant under pressure.
  • a vertical wall (12) is arranged in the lower zone of the refrigerating compartment (2) in a direction parallel to the direction of injection and against the side wall (15) of the compartment (2). accommodating the guide and centering duct (8).
  • This side wall (15), the adjacent proximal side wall (16) of the duct (8), and the partition (12) form an injection zone, consisting of a containment lock, where the pressure is relatively high during operation. 'injection.
  • This partition (12) consists of a piece of sheet metal.
  • This partition (12) could be positioned differently to distribute the coolant in another way if necessary.
  • the air circulation and thus the production of cold by activating or deactivating the fans (11).
  • the latter are controlled by an electronic central unit or by electromechanical means, which retrieves (s) the information of at least one ambient temperature sensor positioned in the compartment to be refrigerated (3) and compares (s) this information to a temperature preset setpoint.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP13305327.2A 2013-03-19 2013-03-19 Kühlwagen mit eingebauter Vorrichtung zum Kühlen und Aufrechterhaltung der Kühlung Withdrawn EP2781862A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13305327.2A EP2781862A1 (de) 2013-03-19 2013-03-19 Kühlwagen mit eingebauter Vorrichtung zum Kühlen und Aufrechterhaltung der Kühlung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13305327.2A EP2781862A1 (de) 2013-03-19 2013-03-19 Kühlwagen mit eingebauter Vorrichtung zum Kühlen und Aufrechterhaltung der Kühlung

Publications (1)

Publication Number Publication Date
EP2781862A1 true EP2781862A1 (de) 2014-09-24

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EP13305327.2A Withdrawn EP2781862A1 (de) 2013-03-19 2013-03-19 Kühlwagen mit eingebauter Vorrichtung zum Kühlen und Aufrechterhaltung der Kühlung

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE626577C (de) * 1934-01-04 1936-02-28 Kuehltransit Verkehrs Akt Ges Kuehlfahrzeug mit einem Kohlensaeureeisbehaelter
US3866435A (en) * 1972-06-05 1975-02-18 Burger Eisenwerke Ag Cooling container
FR2621386A1 (fr) * 1987-10-02 1989-04-07 Cime Sarl Procede de generation d'un debit de gaz refrigere et son application pour le maintien et l'homogeneisation des temperatures dans les enceintes refrigerees mobiles pour denrees alimentaires ou autres
FR2760826A1 (fr) 1997-03-11 1998-09-18 Carboxyque Francaise Chariot refrigere et installation de rechargement en agent refrigerant
GB2424476A (en) 2005-03-22 2006-09-27 Burlodge Ltd A food regeneration trolley and workstation
EP1724538A1 (de) * 2005-05-20 2006-11-22 Olivo Logistiksystem für den Transport von frischen oder gefrorenen Produkten
FR2891899A1 (fr) * 2005-10-12 2007-04-13 Air Liquide Systeme d'injection de neige carbonique dans des conteneurs isothermes et conteneurs associes
WO2008024545A2 (en) 2006-08-25 2008-02-28 Motorola, Inc. Method and apparatus for facilitating a conveyance of informational content using wireless addresses

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE626577C (de) * 1934-01-04 1936-02-28 Kuehltransit Verkehrs Akt Ges Kuehlfahrzeug mit einem Kohlensaeureeisbehaelter
US3866435A (en) * 1972-06-05 1975-02-18 Burger Eisenwerke Ag Cooling container
FR2621386A1 (fr) * 1987-10-02 1989-04-07 Cime Sarl Procede de generation d'un debit de gaz refrigere et son application pour le maintien et l'homogeneisation des temperatures dans les enceintes refrigerees mobiles pour denrees alimentaires ou autres
FR2760826A1 (fr) 1997-03-11 1998-09-18 Carboxyque Francaise Chariot refrigere et installation de rechargement en agent refrigerant
GB2424476A (en) 2005-03-22 2006-09-27 Burlodge Ltd A food regeneration trolley and workstation
EP1724538A1 (de) * 2005-05-20 2006-11-22 Olivo Logistiksystem für den Transport von frischen oder gefrorenen Produkten
FR2891899A1 (fr) * 2005-10-12 2007-04-13 Air Liquide Systeme d'injection de neige carbonique dans des conteneurs isothermes et conteneurs associes
WO2008024545A2 (en) 2006-08-25 2008-02-28 Motorola, Inc. Method and apparatus for facilitating a conveyance of informational content using wireless addresses

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