EP3311083A1 - Étagère réfrigérante - Google Patents

Étagère réfrigérante

Info

Publication number
EP3311083A1
EP3311083A1 EP16717905.0A EP16717905A EP3311083A1 EP 3311083 A1 EP3311083 A1 EP 3311083A1 EP 16717905 A EP16717905 A EP 16717905A EP 3311083 A1 EP3311083 A1 EP 3311083A1
Authority
EP
European Patent Office
Prior art keywords
cooling
shelf
group
compressor
evaporator
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.)
Granted
Application number
EP16717905.0A
Other languages
German (de)
English (en)
Other versions
EP3311083C0 (fr
EP3311083B1 (fr
Inventor
Reinhold Resch
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.)
AHT Cooling Systems GmbH
Original Assignee
AHT Cooling Systems GmbH
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 AHT Cooling Systems GmbH filed Critical AHT Cooling Systems GmbH
Publication of EP3311083A1 publication Critical patent/EP3311083A1/fr
Application granted granted Critical
Publication of EP3311083C0 publication Critical patent/EP3311083C0/fr
Publication of EP3311083B1 publication Critical patent/EP3311083B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/12—Inflammable refrigerants

Definitions

  • the invention relates to a refrigerated shelf having at least one unit comprising a plurality of wall groups, namely a floor assembly, a rear wall group and a roof group, which delimit a cooling space at the bottom, rear and top, and a cooling device having a refrigerant circuit, which as components at least one compressor, an evaporator, a condenser and an electrical control device.
  • a cooling rack of this kind is apparent, for example, from DE 10 2012 107 713 A1. It is particularly suitable for use in enclosed spaces and is characterized by a stable construction and a simple variation of the size of the cooling rack, which also allows the cooling of larger quantities of refrigerated goods. Refrigerated cabinets with a higher refrigeration capacity (about> 2 kW) are nowadays usually still operated with conventional, generally fluorinated refrigerants, especially when used in closed rooms. One reason is the properties of alternative, natural refrigerants, such as carbon dioxide or hydrocarbons, which make natural refrigerants not readily applicable in existing systems.
  • hydrocarbons such as propane or butane as natural refrigerants are subject to restrictive regulations (eg, IEC 600335-289) because of their ignitability, according to which their contents are limited to up to 150 g per refrigerant cycle in conventional refrigeration systems.
  • restrictive regulations eg, IEC 600335-289
  • such quantities are not sufficient for higher cooling capacities.
  • the safety requirements increase considerably, especially in confined areas, so that a considerable effort is required to meet these requirements.
  • hydrocarbons in refrigerated cabinets for interior spaces are usually, if at all, used in refrigerant circuits with capacities up to a maximum of 150 g, so that generally only smaller performance classes are used with hydrocarbons (cf., for example, climate Change 17/2014, Dr Michael Kauffeld, study "Decentralized plug-in refrigeration units", Federal Environmental Agency 2014, Table 3).
  • the invention has for its object to provide a cooling rack of the type mentioned, the climate-friendly, efficient and safe to operate.
  • propane with a filling quantity of more than 150 g is contained in the refrigerant circuit as the refrigerant.
  • higher cooling capacities of, for example, more than 2 kW using propane as a natural refrigerant can be efficiently covered with its positive properties with regard to greenhouse potential, availability and thermodynamic properties.
  • larger refrigerated shelves which may consist of several units or shelf modules, can be operated with only one propane-leading refrigerant circuit in this way.
  • one Cooling rack with a length of more than 2 m in particular a so-called multiaxial cooling rack of several (eg., Two or three) rack modules (each, for example, 1, 25 m in length), with only one refrigerant circuit operable, including at longer cooling shelves a high cooling capacity is maintained, as has further been shown in investigations of the inventors.
  • a cooling rack of this length does not need to use a plurality of refrigerant circuits, this has a favorable effect on the reduction of the complexity, since inter alia the number of components present in the cooling device, the total length of the refrigerant line and the assembly effort can be reduced. This in turn has an advantageous effect on the installation and maintenance and on the operating costs of z. As compared to the use of multiple refrigerant circuits with quantities below 150 g.
  • a filling amount of propane between 300 g and 1500 g in the refrigerant circuit to achieve the required cooling capacity is advantageous. Filling quantities above 1500 g, for which already stricter regulations apply, are not required. Be particularly advantageous, a filling amount between 500 g and 900 g, in particular between 650 g and 800 g has been found, as hereby also common z. B. can operate two- or three-axis cooling shelf sizes with a cooling device having only a refrigerant circuit. Surprisingly, it has been found that a certain amount of charge advantageous z. B. can be used for a single-axis and multi-axis cooling rack, so that with a designed cooling device with relatively minor modifications, such as. B.
  • the refrigerant circuit has a low pressure region with an operating pressure between 0.8 and 2.0 bar and a high pressure region with an operating pressure between 20 and 30 bar.
  • the maximum allowable pressure in the low pressure circuit is z. B. 17 bar.
  • the low-pressure region is located downstream of an expansion element and in particular comprises the evaporator.
  • the high pressure region extends from the compressor to upstream of the expansion device and includes the condenser.
  • the compressor and the condenser are spaced from each other, in particular arranged in different wall groups.
  • the evaporator is preferably arranged in the rear wall group, since, for example, a large area is available for heat exchange with the cooling space, so that an efficient cooling of the cooling material can be achieved. Furthermore, the rear wall group can offer a cheap installation space.
  • the spaced arrangement of compressor and condenser which is advantageously arranged on or in the roof group, allows a favorable placement of these individual components, for example, in terms of function, accessibility, space utilization and installation measures. Relating to Propane as a refrigerant also has the advantage that can be avoided by the distributed arrangement of the components of heat esters, since there is no addition of heat through several heat-generating elements in a small space. This measure thus contributes to avoiding high temperatures that could be critical with respect to propane ignition point.
  • the compressor is arranged in the lower region of the rear wall group below the evaporator and if at least one fan for supporting the cold air flow above the evaporator in the rear wall group is arranged.
  • the or the fan has a motor over-temperature protection / exhibit.
  • the blades of the fan can furthermore be made of a special material that prevents sparking, in particular plastic, or be coated accordingly.
  • solenoid valves which are particularly secured against sparking and / or overheating, is advantageous in connection with propane.
  • a further advantageous measure to this end is to dispense with a commonly used brine valve, as used in refrigerated shelves according to the prior art, ie without propane, in a secondary coolant circuit and which is arranged for example on or in the roof group.
  • the control device is preferably arranged on, in particular in or on the roof group, where it is not only visually inconspicuous, but at the same time easily accessible and protected placeable.
  • a safe operation in connection with propane contributes to the fact that the control device is surrounded by a housing, for example a metallic housing, in a shielding manner, this also offering protection against environmental influences such as moisture, in particular splash water, and damaging influences on electrical components ,
  • a housing shields electrical components in the control device additionally from the propane-leading refrigerant circuit.
  • the components of the cooling device arranged in the refrigerant circuit have a maximum surface temperature of less than 300 ° C., preferably less than 160 ° C., during operation. This temperature is sufficiently below the ignition temperature of Propan of 470 ° C to cause no ignition even in the unlikely event of a release of propane from the refrigerant circuit and formation of an ignitable mixture.
  • the compressor is designed as a fully hermetic and suction gas cooled compressor, in particular as a scroll compressor.
  • the hermetic closure prevents the escape of propane into the environment.
  • the cooling prevents excessive heating of the compressor, which on the one hand safety, on the other hand with respect to the life of the compressor is beneficial.
  • the compressor is located in the deepest part of the refrigerant circuit with respect to the geodetic height, this will facilitate the return of any oil in the refrigerant circuit, thus avoiding places in the circuit where oil accumulates.
  • the electrical system used on the cooling rack is at least partially spark-proof.
  • the electrics of the cooling rack includes, for example, the power supply of the individual components of the cooling device, but also the lighting, the rolling motor, etc., as well as connections for controlling and / or regulating components, possibly data connections and possibly other electrical. For example, areas where sparking can not be ruled out can be enclosed.
  • the measures are advantageous in that at least one safety contactor is arranged in a main circuit of the cooling rack, which allows, for example, a monitoring of the contacts in the contactor.
  • electrical components are preferably at least partially provided with a spark-suppressing coating.
  • the components can be electrical components such. B. capacitors and the like, but z. As well as surfaces of components in the cooling device or other mechanical components.
  • spark plug avoiding connectors can be used.
  • spark-proof relays and power supplies is advantageous, for. B. in the field of control device.
  • the evaporator comprises a heat transfer device with aluminum lamellae and / or copper tubes having an inner diameter between 8 mm and 20 mm, preferably between 10 mm and 15 mm (eg 12 mm) and / or have a maximum volume between 3 l and 7 l (eg 4 l and 6 l, respectively).
  • a heat exchanger is, for. Due to the Used, good heat-conducting materials and a well-to-realize flat design, the cooling of the refrigerator in conjunction with propane as a refrigerant efficiently possible. Also conceivable would be other heat transfer devices that are suitable for use with propane.
  • the condenser comprises a (for example soldered) plate heat exchanger with countercurrent principle, on the warm side of which the flow of propane is up to 100 kg / h, preferably up to 80 kg / h the cold side of which is used as a refrigerant in a secondary cycle a glycol / water mixture.
  • a glycol / water mixture A mixture of water with 30-50% by volume (eg 38% by volume) of propylene glycol has been found to be particularly suitable, but other mixtures can also be used.
  • the use of a glycol / water mixture also known as brine in connection with refrigerators, prevents ice from forming in the water.
  • the coolant absorbs the enthalpy discharged from the propane by the propane and thus discharges it from the refrigerant circuit. It would also be conceivable air cooling of the refrigerant circuit, but air has a poorer thermal conductivity than a water mixture.
  • the use of a glycol / water mixture in a secondary circuit which are connected to the secondary circuit of several cooling units with their heat exchangers and the coolant in turn is supplied to a central recooling device, where it is cooled.
  • a recooling device can be arranged at a distance from the cooling shelf, in particular in a separate room, via a supply and return line, which brings advantages with regard to installation space and accessibility.
  • the recooling device can dispense with special safety measures, for example as described above, owing to its distance from the propane-conducting refrigerant circuit.
  • a stable basic structure of the refrigerated shelf can be obtained in that the refrigerated shelf comprises at least two stackable shelf modules, which are constructed of the same module racks with frame profiles having side frames, which carry the bottom group, the rear wall group and the roof group with respective trim parts and that the shelf modules with the in the back wall group arranged common evaporator are provided which extends over several or all shelf modules.
  • a cooling rack of a plurality of shelf modules in which a cooling device is used with a refrigerant circuit, in turn, be integrated as a module in a cooling rack assembly of several refrigerated shelves.
  • the side frames preferably have a C-shape in lateral view.
  • An energy-efficient operation of the cooling rack can be achieved by a frontrollo driven by a roller motor is accommodated in the front section of the roof group.
  • the refrigerator is at times when it does not need to be accessible, closable or concealable, so that the cooling performance can be reduced to maintain the product cooling temperature.
  • the roller motor which is advantageously positioned anyway in the overall structure, has a structure which avoids sparking and / or is accommodated in a shielding encapsulation.
  • the structure avoiding sparking can be achieved, for example, as previously mentioned, by spark plug-avoiding plug connections, corresponding coatings or further measures.
  • the encapsulation is advantageously gas-tight, so that in the case of a propane outlet from the refrigeration circuit no ignitable mixture enters the housing. So could itself in the If there is a spark on the rolling motor or in case of overheating due to a defect, ignite any ignitable mixture.
  • the rolling motor can also advantageously be provided with a motor overtemperature protection, so that the motor is not operated when a certain temperature is exceeded.
  • 1 is a cooling rack with three lined-up shelf modules (not yet fully assembled state) in a perspective view from the front, side,
  • FIG. 2 is a schematic view of two refrigerated shelves of two shelf modules or three shelf modules with schematically illustrated components of a cooling device with a connection to a central recooling device,
  • Fig. 3 is a perspective view of a refrigerated shelf from obliquely laterally forward in laterally open representation
  • Fig. 4 is an open side view of a shelf module.
  • cooling rack 1 shows a suitable for installation in a sales room cooling shelf 1 with three shelf modules 1.1, 1.2, 1.3 (so-called three-axle design), wherein the cooling rack 1 includes a front accessible refrigerator 4 on the back and up and down by wall groups.
  • the cooling rack 1 can be combined with other refrigerated shelves 1 to a cooling rack assembly, the refrigerated shelves 1 also made less shelf modules 1.1, 1.2, 1.3, z. B. two biaxial design) or even one (single-axis design), may exist, so that the length of the cooling rack is preferably one or more times a module length (usually 1, 25 m).
  • side walls are preferably also laterally mounted on the two sides of the cooling rack 1 and the cooling rack assembly.
  • the front can be open-access or be provided for specific applications with at least one door element.
  • the front can be closed with a roller 63, which is located in the front roof area.
  • 4 shelves are mounted in the refrigerator, on which the refrigerated goods, such as meat products or dairy products or the like. In a sales room, is launched.
  • components of a cooling device 5 are integrated in the cooling rack 1, in particular a control unit 55.1 of a control device 55 (see Fig. 3) and fans 56, 57 for generating or supporting necessary Air flows (see Fig. 3), connecting means 53 including connecting lines 53.1 and in a refrigerant circuit, an evaporator 50, 50 ', a compressor 51, a condenser 52 and an expansion valve assembly.
  • pressure switches preferably one each on the high-pressure side and one on the low-pressure side, which are released for operation with flammable refrigerants, are additionally integrated in the refrigerant circuit.
  • pressure transmitters eg one each on the high pressure side and one on the low pressure side
  • a filter drier and at least one sight glass on the high pressure side in the refrigerant circuit are advantageously arranged.
  • the pipelines of the circuit are preferably made of copper, being used as a joining technique brazing.
  • the condenser 52 may be connected via the corresponding connecting lines 53.1 via a secondary circuit to a preferably located in another room recooling device 54 with a heat exchanger. If necessary, z. B.
  • a larger cooling rack assembly also several similar components of the cooling device 5 include, in particular a plurality of refrigerant circuits. In the present embodiment, the cooling rack 1 in uniaxial, biaxial or triaxial design only a refrigerant circuit.
  • propane is fed as a natural refrigerant, wherein the amount of propane is between 650 g and 800 g.
  • This amount has in the cooling rack 1 of said structure with a length between z. B. 1 m and 4 m proved to be particularly advantageous.
  • z. B. three-axis refrigerators larger amounts of propane in a refrigerant circuit are conceivable, but should not exceed 1500 g for safety reasons. Smaller quantities would also be conceivable.
  • the cooling rack 1 shown in the exemplary embodiments is particularly suitable for use with propane as a refrigerant in several respects, with some modifications being made in comparison with the variant operated with conventional refrigerant.
  • One reason for the good suitability is in particular the modular design with high flexibility with respect to the component arrangement, both components of the cooling unit 4 and other components.
  • the structure offers advantages in terms of efficiency, so that the relatively small amount of propane is sufficient as a refrigerant of preferably 650 g and 800 g for applying the required cooling capacity in the cooling space 4 of the cooling rack 1, which in turn is beneficial to safety.
  • the construction of advantageous design variants of the refrigerated shelf 1 will be described in more detail below.
  • each shelf module 1.1, 1.2, 1.3 are arranged on each side of the same side frame 10 with a side view C-shaped configuration with a vertical profile 10.1 along the back, a down at this connected and forward projecting lower horizontal section 10.2 and an upper, at the top End portion of the vertical profile 10.1 connected, forward projecting upper horizontal profile 10.3.
  • the lower horizontal profile 10.2 projects further forward than the upper horizontal profile 10.3.
  • an upper horizontal profile 10.3, which is just as long or longer than the lower horizontal profile 10.2 can be advantageous in order, for. B. an upper stem with blind and a lighting device stable and without bending to wear.
  • a support profile 10.4 is installed at a distance from the latter, between the lower and upper horizontal profiles 10.2, 10.3. Between the upper and lower end side of the support section 10.4 and the upper and lower horizontal profile 10.3, 10.2 are block-like heat-insulating elements z. B. of good heat insulating, stable plastic mounted to prevent thermal bridges from the outside in, which also results in advantageous assembly aids.
  • the lower horizontal profile 10.2 is supported on feet 60, 61 with leveling possibility.
  • the two side frames 10 form with them connecting longitudinal elements, for. B. longitudinal struts and / or trim parts, stable modular racks with frame profiles.
  • each shelf module 1.1, 1.2, 1.3 or the module racks carry by their lower horizontal profiles 10.2 the bottom group 11, by means of their vertical profiles 10.1 and 10.4 support the rear wall group 12 and by means of their upper horizontal profiles 10.3 the roof group 13 and give a stable structure with simple assembly steps.
  • they ensure a stable juxtaposition of several shelf modules 1.1, 1.2, 1.3 to the cooling rack 1 and the cooling rack assembly, wherein the cooling rack 1 is transportable as a stable unit by means of a lifting device or vehicle.
  • the condenser 52 with corresponding connection means 53 is arranged in a preferred embodiment according to the embodiment shown in or on the roof group 13 in a formed there upperdekomponentenage 13.30 in the region of a top cover 13.3 from above or behind easily accessible.
  • a pressure vessel of a dryer / collector unit of the condenser 52 can be acted upon with a maximum pressure of up to 30 bar or higher. He has a high bursting pressure, for example, more than 130 bar, so that a large safety margin is guaranteed to the operating pressure for the use of propane.
  • the volume of the pressure vessel is between 0.4 l and 1.4 l, preferably between 0.5 l and 0.8 l, and is thus significantly lower than conventionally used refrigerants, for. B. about half as large, depending on which conventional refrigerant is.
  • the pressure vessel has an elongated, cylindrical shape, whereby the pressure vessel can be arranged to save space in or on the roof group.
  • the compressor 51 is arranged in the lower region of the rear wall group 12 behind a cooling cover 4 to the rear limiting inner cover 12.1 in a (not shown in detail) receiving chamber of a receiving device. It is located in the lowest range of the refrigerant circuit with respect to the geodetic height.
  • the evaporator 50, 50 ' is also arranged behind the inner cover 12.1 and mounted with means of the receiving device. As can be seen from FIG.
  • the evaporator 50 extends continuously over all three shelf modules 1.1, 1.2, 1.3, while the compressor 51 and the condenser 52 are common for all shelf modules 1.1, 1.2, 1.3 of the refrigerated shelf 1 in two- or three-axle design in only one, namely in the embodiment of FIGS. 1 and 2 in the right shelf module 1.1 (module b) arranged and to the evaporator 50 'via corresponding connecting lines below Intermediate interconnecting links of the cooling device 5, such as expansion valve or throttle, are connected.
  • the arrangement in only one shelf module 1.1, 1.2, 1.3 is advantageous in the case of using propane in that the line length can be reduced in comparison to an arrangement in different rack modules, which can reduce the number of potential leak sites.
  • a sufficient distance between the compressor 51 and the condenser 52 is ensured by the arrangement in different wall groups of the cooling rack 1, namely the rear wall group 12 and the roof group 13, for example, to prevent heat transfer of the compressor 51 to the condenser 52 and the formation of Prevent hot springs from excessive temperature development.
  • the bottom group 11 delimited with an overhead floor cover 1 1 .1 the refrigerator 4 down and carries on its front a with Heil gutslö- ehern, in particular air passage slots, provided grille 1 1 .10 and a front cover 1 1.4 with bump or trim strip in lower front edge area.
  • an advantageous exemplary embodiment of the refrigerated shelf 1 is that only one shelf module 1.1 is provided with all components of a cooling device except for the possibly provided central recooling device 54 with respective supply and return connecting lines 53.1 (module with type of expansion b), while the other shelf modules of a cooling rack assembly are provided with only one evaporator 50, 50 ', wherein the evaporator 50, 50' is advantageously designed as a continuous unit (modules of the expansion type a). If the cooling rack 1 consists of only one rack module 1 .1, this rack module 1.1 advantageously forms a module of the expansion type b.
  • connection means 53 including connecting lines 53.1 and optionally electrical wiring for a signal transmission (sensors, control) and electrical power supply to the other relevant components of the cooling device in the shelf module 1 of the expansion type b connected.
  • connection means 53 including connecting lines 53.1 and optionally electrical wiring for a signal transmission (sensors, control) and electrical power supply to the other relevant components of the cooling device in the shelf module 1 of the expansion type b connected.
  • the electrical wiring and possibly other components for example, by spark plug avoiding connectors and / or special coatings are particularly protected against sparking.
  • the distances of the printed conductors in particular from high-voltage lines which serve to supply power to electrical components of higher power consumption, are increased in comparison with the cooling rack design with conventional refrigerants, eg. B.
  • control device 55 in which there is a large number of electrical components, additionally surrounded by a housing or encapsulated and thus shielded from the environment.
  • All shelf modules 1.1, 1.2, 1.3 can, however, in the same way for receiving all required components of the cooling device 5 and with preinstalled sections of the connecting lines 53.1 and connecting means for a simple, fast connection between the cooling components of the shelf modules and optionally with the central re-cooling device 54th be prepared so that modules
  • an extension type with low installation costs in a module of the other or possibly another type of expansion with other or other components of the cooling device can be converted.
  • a refrigerated shelf arrangement with a larger number of shelf modules more than just a shelf module of the expansion type b or a type of expansion with additional components of the cooling device may be present.
  • a one- or two-module refrigerated shelf 1 can simply be extended to a two- or three-module by the simple replacement of the evaporator 50 to 50 '.
  • Other essential components of the refrigerant circuit can be maintained, since with a uniform amount, the z. B. is between 650 g and 800 g, both uniaxial and multi-axis (eg., Two- or three-axis) refrigerated shelves are efficiently operated, as has been found in studies of the inventors. To optimize a respective cooling rack design but also different components can be installed. As FIG.
  • FIG. 2 further shows, only one shelf module 1.1 with the prepared connection means 53, which contain, for example, quick-release couplings and controllable valves, needs to be connected to the central recooling device 54, whereas the remaining shelf modules 1.2, 1.3 merely have the integrated Connecting means 53 are easily connected to each other.
  • the central recooling device 54 is usually connected via the secondary circuit to the condenser 52 of the relevant shelf module 1.1 (type of expansion b), wherein in the secondary circuit preferably a brine or a glycol / water mixture is used as a coolant.
  • the condenser 52 may, for. B. a compact plate or tube heat exchanger, in particular a soldered plate heat exchanger with countercurrent principle can be used.
  • the central re-cooling device 54 In the central recooling device 54 resulting heat can be dissipated for another use of thermal energy, as indicated by the arrow top right.
  • propane as the refrigerant, the central re-cooling device 54 additionally has the advantage that it is not subjected to increased safety requirements due to the distance to the cooling rack 1 and thus no additional measures are necessary for its protection.
  • the base group 11, the rear wall group 12 and the roof group 13 are configured in a multi-layered manner with interspaces formed between them for forming channels for the air guidance.
  • the air duct is effected or assisted by means of fans 56, 57 which are designed, for example, as radial fans or diagonal fans and of which one is arranged in the lower region and one or two in the upper region of the rear wall group 12 in the embodiment shown.
  • the or the upper fan 56 causes or thereby cause the flow of air through the evaporator 50, 50 ', from bottom to top.
  • a portion of the cooling air flow formed by the evaporator 50, 50 ' is on the back of the inner cover 12.1 again after passed down and flows through existing in the inner cover 12.1 vents in the refrigerator 4 to keep it at the required cooling temperature.
  • the one or more fans 56 arranged above the evaporator 50, 50 ' have proved to be particularly effective and favorable for safety, whereby the below the evaporator 50, 50' can be dispensed with.
  • the bottom cover 11.1, the inner cover 12.1 and the lower cover 13.1 of the roof group 13 are made of thin-walled plates, in particular made of metal or plastic, which are also easy to handle and clean for a good transfer of cooling power to the refrigerator 4.
  • the plates of the bottom cover 11.1 are advantageously segmented in the width direction and extend from the grille 11.10 in the front region of the bottom group 11 to the lower region of the inner cover 12.1 of the rear wall group 12.
  • the plates of the inner cover 12.1 of the rear wall group 12 are advantageously segmented in the vertical direction and extend over the entire width between the two side frames 10 of a shelf module 1.1, 1.2, 1.3, wherein a plurality of vertically stacked plates can be easily used and removed, for. B. uncovering relevant components of the cooling device 5, to clean or to install or remove.
  • anti-tilt devices 62 projecting downwards are attached to the lower end section of the vertical profiles 10. 1, which advantageously provide an adaptation to unevenness in the ground, for example. B. by resilient or elastic intermediate elements and / or adjusting allow.
  • a lighting device 64 may be arranged in the front region of the floor assembly 11 and / or the roof group 13.
  • the illumination device 64 is advantageously designed as LED illumination with matched drivers so as not to act as an ignition source in connection with the refrigerant used.
  • the roller 63 is arranged to z. For example, close the cold storage room outside the store hours and save cooling energy.
  • the motor for driving the roller blind 63 is also provided with spark-preventing means. For example, it is accommodated in a protective encapsulation and / or spark-generating transition points in the area of live rotating parts are to be avoided.

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

Abstract

L'invention concerne une étagère réfrigérante (1) qui comporte au moins une unité composée de plusieurs groupes de parois, notamment un groupe formant fond (11), un groupe formant paroi arrière (12) et un groupe formant paroi de recouvrement (13), qui délimitent un espace frigorifique (4) en bas, du côté arrière et en haut, ainsi qu'un dispositif de refroidissement (5) présentant un circuit de fluide réfrigérant et comprenant comme composants au moins un compresseur (51), un évaporateur (50), un condenseur (52) et un dispositif de commande électrique (55). Une étagère réfrigérante efficace et écologique, qui fonctionne de manière sûre, peut ainsi être obtenue du fait que le circuit de fluide réfrigérant contient, en tant que fluide réfrigérant, du propane, dans une quantité de remplissage supérieure à 150 g.
EP16717905.0A 2015-06-16 2016-05-13 Vitrine réfrigérée Active EP3311083B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015109611.0A DE102015109611A1 (de) 2015-06-16 2015-06-16 Kühlregal
PCT/EP2016/058665 WO2016202486A1 (fr) 2015-06-16 2016-05-13 Étagère réfrigérante

Publications (3)

Publication Number Publication Date
EP3311083A1 true EP3311083A1 (fr) 2018-04-25
EP3311083C0 EP3311083C0 (fr) 2024-03-27
EP3311083B1 EP3311083B1 (fr) 2024-03-27

Family

ID=57466711

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16717905.0A Active EP3311083B1 (fr) 2015-06-16 2016-05-13 Vitrine réfrigérée

Country Status (7)

Country Link
US (1) US10368659B2 (fr)
EP (1) EP3311083B1 (fr)
CN (1) CN107532838B (fr)
AR (1) AR105021A1 (fr)
BR (1) BR112017018256A2 (fr)
DE (1) DE102015109611A1 (fr)
WO (1) WO2016202486A1 (fr)

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DE102015106620A1 (de) * 2015-04-29 2016-11-03 Aht Cooling Systems Gmbh Kühlregalvorrichtung
USD820619S1 (en) 2017-04-06 2018-06-19 Apple Inc. Retail display
WO2019102252A1 (fr) * 2017-11-22 2019-05-31 Uab "Freor Lt" Îlot réfrigéré autonome d'armoires semi-verticales et procédé de réfrigération
USD867037S1 (en) * 2018-05-30 2019-11-19 Apple Inc. Retail display
USD885805S1 (en) 2018-07-10 2020-06-02 Apple Inc. Retail fixture
DE202018004422U1 (de) 2018-09-25 2018-10-11 Edgar Hakemann Steckerfertiges Kühlmöbel
USD931019S1 (en) 2019-09-19 2021-09-21 Apple Inc. Retail fixture
JP7321297B2 (ja) * 2020-02-03 2023-08-04 三菱電機株式会社 ショーケース
CN112586951B (zh) * 2020-12-08 2022-06-10 深圳市亚讯威视数字技术有限公司 一种产品展览用针对计算机旋转式展示台
USD1011102S1 (en) * 2022-09-29 2024-01-16 Navone Associati S.R.L. Display stand

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JP3386615B2 (ja) * 1995-01-23 2003-03-17 株式会社東芝 冷凍冷蔵庫
JP3592514B2 (ja) * 1998-03-02 2004-11-24 松下電器産業株式会社 冷凍装置
US7146290B2 (en) * 2000-11-27 2006-12-05 Uview Ultraviolet Systems, Inc. Apparatus and method for diagnosing performance of air-conditioning systems
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Also Published As

Publication number Publication date
US20180146799A1 (en) 2018-05-31
BR112017018256A2 (pt) 2018-05-15
WO2016202486A1 (fr) 2016-12-22
EP3311083C0 (fr) 2024-03-27
EP3311083B1 (fr) 2024-03-27
AR105021A1 (es) 2017-08-30
US10368659B2 (en) 2019-08-06
CN107532838A (zh) 2018-01-02
DE102015109611A1 (de) 2016-12-22
CN107532838B (zh) 2021-09-21

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