EP2821739B1 - Chambre froide transportable - Google Patents

Chambre froide transportable Download PDF

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Publication number
EP2821739B1
EP2821739B1 EP14176020.7A EP14176020A EP2821739B1 EP 2821739 B1 EP2821739 B1 EP 2821739B1 EP 14176020 A EP14176020 A EP 14176020A EP 2821739 B1 EP2821739 B1 EP 2821739B1
Authority
EP
European Patent Office
Prior art keywords
cooling chamber
cooling
housing
chamber according
holding space
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.)
Active
Application number
EP14176020.7A
Other languages
German (de)
English (en)
Other versions
EP2821739A3 (fr
EP2821739A2 (fr
Inventor
Helmut Dipl. Ing. Schumacher
Norbert Kesselmann
Willem Kruit
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.)
Hupfer Metallwerke GmbH and Co KG
Original Assignee
Hupfer Metallwerke GmbH and Co KG
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 Hupfer Metallwerke GmbH and Co KG filed Critical Hupfer Metallwerke GmbH and Co KG
Publication of EP2821739A2 publication Critical patent/EP2821739A2/fr
Publication of EP2821739A3 publication Critical patent/EP2821739A3/fr
Application granted granted Critical
Publication of EP2821739B1 publication Critical patent/EP2821739B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/02—Devices using other cold materials; Devices using cold-storage bodies using ice, e.g. ice-boxes
    • F25D3/06—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
    • F25D2400/20—Carts specially adapted for transporting objects to be cooled

Definitions

  • the invention relates to a transportable cooling space according to the preamble of claim 1 with a housing and with a refrigerant reservoir for cooling a refrigerated goods receiving space within the housing.
  • the transportable cold room can be used, for example, to cool food and food distribution components or for the cooled transport of blood and medicines.
  • the term "transportable cold room” includes in particular tray transport trolleys for trays that are equipped with crockery components and dishes served on them, as well as mobile transport devices that are used, for example, in the context of food regeneration and food distribution and have a housing or a container with an interior to be cooled . In large kitchens, for example in hospitals, meals are often prepared and put together well in advance of consumption.
  • a transportable cold room whose refrigerant reservoir contains pourable ice, with used refrigerant being drained from the refrigerant reservoir in the form of melt water.
  • the filling space of the refrigerant reservoir consists of a vertical shaft and is arranged in a partition which divides the receiving space for the goods to be cooled into at least two areas.
  • the filling space of the refrigerant reservoir can contain a sieve insert, which the ice in a defined Holds altitude and lets melt water through.
  • the arrangement creates a cooling wall within the refrigerated goods receiving space, which extends from the bottom of the housing to the top of the housing and has a surface temperature predetermined by the ice or the ice / melt water mixture.
  • the cooling effect of the cooling wall is insufficient. A temperature stratification with an uneven temperature distribution from top to bottom sometimes occurs within the refrigerated goods receiving space.
  • Out FR 700 071 A a transportable cold room is known which is designed according to the preamble of claim 1.
  • the refrigerant reservoir is arranged above the refrigerated goods receiving space and, to improve the heat exchange, has a cooling body with cooling surfaces which extend along a wall surface into the bottom area of the refrigerated goods receiving space.
  • the cooling effect on the cooling surfaces creates natural convection and a circulation flow within the refrigerated goods receiving space.
  • a guide surface is provided within the filling material receiving space, which is arranged below the refrigerant reservoir.
  • the interior space of the housing that can be used as a space for accommodating refrigerated goods is restricted over the entire height by the arrangement and necessary dimensions of the cooling body. Furthermore, the cooling body arranged within a flow channel cannot be cleaned or can only be cleaned with difficulty.
  • a cooling space according to the preamble of claim 1 is known, in which two adjoining refrigerated goods receiving spaces are separated from each other by a partition, the partition having a guide surface via which a circulating free convection flow can be generated in the lower refrigerated goods receiving space.
  • the invention is based on the object of designing the transportable cooling space in such a way that a substantially constant temperature is established within the cooling goods receiving space.
  • the heat sink provided for this purpose should be designed in a structurally simple manner, have a structure that is as compact as possible and be easy to clean.
  • the subject matter of the invention and the solution to this problem is a transportable cold room according to claim 1.
  • the refrigerant reservoir is arranged above the refrigerated goods receiving space and has a cooling body protruding into the refrigerated goods receiving space to improve the heat exchange. Furthermore, a guide surface is provided for initiating and guiding a free convection flow circulating in the receiving space.
  • Free convection - also known as natural convection - is based on differences in density in the air space enclosed by the housing. Because of the cooling, air layers directly on the surface of the heat sink have a lower temperature and greater density than the room air within the cooling goods receiving space spaced apart from the heat sink. As a result, the air inside the refrigerated goods receiving space experiences a thermal lift, the guide surface directing the air flow based on natural convection. A circulation flow is created.
  • the cooling body is arranged above the guide surface and has an arrangement of several cooling ribs protruding into the cooling goods receiving space.
  • the circulating air sweeps along the cooling fins of the heat sink, is directed downwards along a thermally insulated wall surface of the housing and rises again on an opposite wall surface.
  • the guide surface is aligned essentially horizontally, with a slight inclination the circulation flow is stimulated and amplified much faster.
  • the guide surface is therefore an obliquely inclined flat surface, the angle of inclination to the horizontal being 0.5 to 10 degrees, preferably about 1 to 5 degrees.
  • the invention provides that the refrigerant reservoir has a tub for filling with pourable ice and that the cooling body is arranged on the underside of the tub and connected to the tub directly or indirectly through heat-conducting intermediate elements.
  • the housing can have a front door that is expediently thermally insulated.
  • the circulating free convection flow is established between a thermally insulated side wall of the housing and a thermally insulated front door.
  • side wall also includes, in particular, a rear wall of the housing.
  • the front door expediently extends over the entire height of the refrigerated goods receiving space.
  • Pourable ice which consists of water, can be used as the refrigerant for operating the device according to the invention.
  • crushed ice, ice cubes and flake ice can be used as pourable ice.
  • the heat sink can have additional heat transfer surfaces which extend into the interior of the tub. Used refrigerant is drained from the pan in the form of melt water.
  • a device for draining off melt water is connected to the tank. It is also within the scope of the invention that at least one side wall of the housing and / or a vertical partition wall within the receiving space has a channel for discharging melt water.
  • the tub for receiving the pourable ice can with a lid z. B. be closed with a removable lid or hinged lid.
  • the device according to the invention is not limited to operation with pourable ice consisting of water. Eutectic plates, pre-cooled ice packs or dry ice can also be used as a cooling source. In such configurations, the refrigerant reservoir has at least one compartment for pre-cooled eutectic plates or pre-cooled cooling packs or a tub for dry ice that can be closed with a cover.
  • the figures show a transportable cold room using the example of a tray transport trolley.
  • the tray transport trolley has a housing 1 with thermally insulated side walls 2 and a front door 3 that is likewise thermally insulated.
  • the tray transport trolley is also equipped with a refrigerant reservoir 4 for cooling a refrigerated goods receiving space 5 within the housing 1.
  • the housing 1 can be moved on rollers 6.
  • lateral support surfaces in the form of strips 7 for inserting trays 8 are provided.
  • the trays 8 maintain a distance from the side wall 2 of the housing and the inside of the door 3.
  • the free space stands for an in Fig. 1 indicated circulating air flow available.
  • the refrigerant reservoir 4 is arranged above the refrigerated goods receiving space 5 and has a cooling body 9 protruding into the refrigerated goods receiving space to improve the heat exchange.
  • a guide surface 10 for initiating and guiding a free convection flow circulating in the refrigerated goods receiving space 5 is also arranged below the cooling body 9.
  • the guide surface 10 consists of a guide plate and forms an obliquely inclined flat surface. The angle of inclination is about 1 to 5 degrees to the horizontal.
  • the guide plate 10 preferably maintains a distance of at least 30 mm to the side wall 2 or rear wall of the housing and to the inside of the door 3 in order not to hinder the circulation of the free convection flow.
  • the heat sink 9 is designed as a ribbed heat sink. It has an arrangement of several parallel cooling ribs 11 protruding into the refrigerated goods receiving space and is arranged on the underside of a trough 12, which is filled, for example, with pourable ice.
  • the tub 12 filled with pourable ice forms the refrigerant reservoir 4.
  • the cooling body 9 is connected to the tub 12 directly or indirectly through heat-conducting intermediate elements. Like the heat sink 9, this consists of a material with good thermal conductivity properties.
  • the tub 12 is made of sheet metal in the exemplary embodiment. As shown in Fig. 2 if the heat sink 9 has additional heat transfer surfaces 13, which extend into the interior of the trough 12, to improve the heat transfer.
  • the heat transfer surfaces 13 are designed as ribs, the distance between the ribs being selected to be sufficiently large so that the pourable ice 14 can fill the spaces between the ribs.
  • the tub 12 is expediently closed with a cover 15 and is also suitable for receiving dry ice as a refrigerant. If the tub is designed with a flat bottom surface, the tub can also be charged with pre-cooled ice packs or pre-cooled eutectic plates.
  • To the tub 12 can be in the Fig. 1 and 2 Not shown device for draining melt water be connected.
  • Fig. 3 has a vertical partition 16 within the refrigerated goods receiving space 5 on a channel 17 for draining melt water.
  • the channel for discharging melt water is arranged on or in a side wall 2 of the housing 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Claims (11)

  1. Chambre froide transportable avec un bâti (1), un espace de réception de produits de réfrigération (5) à l'intérieur de ce bâti (1) et avec un réservoir d'agent réfrigérant (4) pour le refroidissement de cet espace de réception de produits de réfrigération (5) à l'intérieur du bâti (1), dans laquelle le réservoir d'agent réfrigérant (4) est disposé au-dessus de l'espace de réception de produits de réfrigération (5) et présente un corps de refroidissement (9) pour l'amélioration de l'échange de chaleur et dans laquelle une surface de guidage (10) est prévue pour initier et guider un écoulement de convection libre circulant dans l'espace de réception de produits de réfrigération (5), dans laquelle le corps de refroidissement (9) est disposé au-dessus de la surface de guidage (10) et présente un agencement de plusieurs ailettes de refroidissement parallèles (11) faisant saillie dans l'espace de réception de produits de réfrigération et dans laquelle l'écoulement de convection libre en circulation est orienté vers le bas le long d'une surface de paroi isolée thermiquement du bâti (1) et remonte à nouveau au niveau d'une surface de paroi située en vis-à-vis, dans laquelle le réservoir d'agent réfrigérant (4) présente un bac (12) pour le remplissage avec de la glace en vrac (14),
    caractérisée en ce que le corps de refroidissement (9) est disposé sur le dessous du bac (12) et est relié directement au bac (12) ou de manière indirecte grâce à des éléments intermédiaires thermoconducteurs.
  2. Chambre froide selon la revendication 1, caractérisée en ce que l'écoulement de convection libre en circulation s'établit entre une paroi latérale isolée thermiquement du bâti et une porte côté avant isolée
  3. Chambre froide selon la revendication 2, caractérisée en ce que l'espace de réception de produits de réfrigération (5) est doté de surfaces d'appui latérales (7) pour l'insertion de plateaux (8).
  4. Chambre froide selon l'une des revendications 1 à 3, caractérisée en ce que la surface de guidage (10) est une surface plane inclinée en biais.
  5. Chambre froide selon la revendication 4, caractérisée en ce que la surface de guidage (10) est inclinée d'un angle de 1 à 5 degrés par rapport à l'horizontale.
  6. Chambre froide selon l'une des revendications 1 à 5, caractérisée en ce que le corps de refroidissement (9) présente, pour l'amélioration de la transmission de chaleur, des surfaces de transmission de chaleur (13) supplémentaires qui s'étendent dans l'espace intérieur du bac (12).
  7. Chambre froide selon l'une des revendications 1 à 6, caractérisée en ce qu'un dispositif pour l'évacuation de l'eau de fonte est relié au bac (12).
  8. Chambre froide selon l'une des revendications 1 à 7, caractérisé en ce qu'au moins une paroi latérale (2) du bâti et/ou une cloison verticale (16) à l'intérieur de l'espace de réception de produits de réfrigération (5) présente un canal (17) pour l'évacuation d'eau de fonte.
  9. Chambre froide selon l'une des revendications 1 à 8, caractérisée en ce que le bac (12) est fermé par un couvercle (15).
  10. Chambre froide selon l'une des revendications 1 à 9, caractérisée en ce que le réservoir d'agent réfrigérant (4) présente au moins un compartiment pour des plaques eutectiques pré-refroidies ou des accumulateurs de froid pré-refroidis.
  11. Chambre froide selon l'une des revendications 1 à 10, caractérisée en ce que le bâti (1) peut se déplacer sur des rouleaux (6).
EP14176020.7A 2013-07-05 2014-07-07 Chambre froide transportable Active EP2821739B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013107125 2013-07-05
DE102013111813.5A DE102013111813B4 (de) 2013-07-05 2013-10-25 Transportabler Kühlraum

Publications (3)

Publication Number Publication Date
EP2821739A2 EP2821739A2 (fr) 2015-01-07
EP2821739A3 EP2821739A3 (fr) 2015-03-25
EP2821739B1 true EP2821739B1 (fr) 2020-09-09

Family

ID=51062730

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14176020.7A Active EP2821739B1 (fr) 2013-07-05 2014-07-07 Chambre froide transportable

Country Status (2)

Country Link
EP (1) EP2821739B1 (fr)
DE (1) DE102013111813B4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017101011A1 (de) * 2017-01-19 2018-07-19 Hupfer Metallwerke Gmbh & Co. Kg Lebensmittelausgabeeinrichtung sowie Verfahren zum Betrieb einer Lebensmittelausgabeeinrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2263522A (en) * 1936-12-24 1941-11-18 James G Scott Apparatus for control and utilization of dry ice

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1921147A (en) * 1929-07-13 1933-08-08 William F Baird Method of and means for controlling low temperature refrigerants
FR700071A (fr) * 1930-08-04 1931-02-24 Perfectionnements aux appareils frigorifiques en particulier aux glacières
US2026353A (en) * 1932-06-09 1935-12-31 William G Mayer Method and apparatus for refrigerating with solid refrigerants
US2073700A (en) * 1934-03-22 1937-03-16 Lester S Keilholtz Device for using solid refrigerant to effect rapid cooling of small enclosed spaces
US2123678A (en) * 1937-05-01 1938-07-12 Refrigerator container
DE29813189U1 (de) * 1998-07-24 1999-02-04 Hupfer Metallwerke GmbH & Co., 48653 Coesfeld Speisentransportwagen mit Kühlwänden
DE102010027541A1 (de) * 2010-07-16 2012-01-19 Hupfer Metallwerke Gmbh & Co. Kg Verfahren zum Kühlen eines Speisentransportwagens und Speisentransportwagen zur Durchführung des Verfahrens
BE1020015A5 (nl) * 2011-02-09 2013-03-05 Acp Belgium N V Systeem voor het inbrengen van koelmiddel in een container.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2263522A (en) * 1936-12-24 1941-11-18 James G Scott Apparatus for control and utilization of dry ice

Also Published As

Publication number Publication date
EP2821739A3 (fr) 2015-03-25
EP2821739A2 (fr) 2015-01-07
DE102013111813B4 (de) 2016-07-28
DE102013111813A1 (de) 2015-01-08

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