EP3311083B1 - Vitrine réfrigérée - Google Patents

Vitrine réfrigérée Download PDF

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Publication number
EP3311083B1
EP3311083B1 EP16717905.0A EP16717905A EP3311083B1 EP 3311083 B1 EP3311083 B1 EP 3311083B1 EP 16717905 A EP16717905 A EP 16717905A EP 3311083 B1 EP3311083 B1 EP 3311083B1
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EP
European Patent Office
Prior art keywords
display case
refrigerated display
refrigerated
group
shelf
Prior art date
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Application number
EP16717905.0A
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German (de)
English (en)
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EP3311083A1 (fr
EP3311083C0 (fr
Inventor
Reinhold Resch
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AHT Cooling Systems GmbH
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AHT Cooling Systems GmbH
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Publication date
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Publication of EP3311083A1 publication Critical patent/EP3311083A1/fr
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Publication of EP3311083C0 publication Critical patent/EP3311083C0/fr
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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—Component parts or details not otherwise provided for in this subclass
    • F25B2400/12—Inflammable refrigerants

Definitions

  • the invention relates to a refrigerated shelf according to claim 1 with at least one unit made up of several wall groups, namely a floor group, a rear wall group and a roof group, which delimit a cooling space at the bottom, back and top, and with a cooling device having a refrigerant circuit, which has at least one evaporator as components , a condenser and an electrical control device.
  • a cooling shelf of this type is in the JP 2004 273271 A specified.
  • This cooling shelf which can also be operated as a warming cabinet, contains propane as a refrigerant in a refrigerant circuit.
  • propane as a refrigerant in a refrigerant circuit.
  • the coiled tube of a heating component is provided with a large number of cooling fins arranged in a row.
  • Another cooling shelf goes out of the DE 10 2012 107 713 A1 out. It is particularly suitable for use in closed rooms and is characterized by a stable structure and a simple variation of the cooling shelf size, which also allows larger quantities of refrigerated goods to be cooled.
  • a device is shown with a cooling device in which propane is used as a refrigerant, for example.
  • propane is used as a refrigerant, for example.
  • B. is used with an amount of 250 g and in a comparative example an amount of 400 g of propane is also mentioned, with a cooling Machine oil with low solubility relative to propane is used, which means the amount of propane can be reduced.
  • FIG. 1 Another refrigeration shelf operated with a refrigerant formed by hydrocarbons is in the JP H08 200944 A shown.
  • a compressor and a condenser are housed in a machine room, which is arranged in a lower shelf area.
  • hydrocarbons such as propane or butane, which are natural refrigerants
  • restrictive regulations e.g. IEC 600335-2-89
  • such quantities are not sufficient for higher cooling capacities.
  • the safety requirements increase considerably, especially in closed rooms, so that considerable effort is required to meet these requirements.
  • hydrocarbons are usually used in refrigeration cabinets for indoor use, if at all, in refrigerant circuits with filling quantities of up to a maximum of 150 g, so that as a rule only smaller performance classes are served with hydrocarbons (cf. e.g. climate Change 17/2014, Dr . Michael Kauffeld, study "Decentralized plug-in cooling devices", Federal Environment Agency 2014, table 3).
  • the invention is based on the object of providing a refrigerated shelf of the type mentioned at the outset, which is climate-friendly, efficient and can be operated safely.
  • 0.8 bar is 80,000 Pa; 2 bar is 200,000 Pa; 20 bar is 2,000,000 Pa and 30 bar is 3,000,000 Pa.
  • larger refrigerated shelves which can consist of several units or shelf modules, can be operated in this way with only one refrigerant circuit carrying propane.
  • a refrigerated shelf with a length of more than 2 m in particular a so-called multi-axis refrigerated shelf made up of several (e.g. two or three) shelf modules (e.g.
  • each 1.25 m long can be operated with only one refrigerant circuit , whereby a high cooling performance is maintained even with longer refrigerated shelves, as the inventors' studies have shown. If there is no need to use several refrigerant circuits in a refrigerated shelf of this length, this has a positive effect on reducing complexity, since, among other things, 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 effort as well as on the operating costs, e.g. B. in comparison to using several refrigerant circuits with filling quantities below 150 g.
  • a filling quantity of propane between 300 g and 1500 g is present in the refrigerant circuit to achieve the required cooling capacity. Filling quantities above 1500 g, for which more stringent regulations apply anyway, are not required.
  • the compressor and the condenser are spaced apart, arranged in different wall groups.
  • the evaporator is arranged in the rear wall group, since here, for example, a large area is available for heat exchange with the cooling space, so that efficient cooling of the refrigerated goods can be achieved.
  • the rear wall group can offer a favorable installation space.
  • the spaced arrangement of the compressor and condenser, which is arranged on or in the roof group, allows these individual components to be placed favorably, for example in terms of function, accessibility, use of installation space and installation measures.
  • propane as a refrigerant results
  • heat pockets can be avoided due to the distributed arrangement of the components, since there is no accumulation of heat due to several heat-generating elements in a small space. This measure helps to avoid high temperatures, which could be critical with regard to the ignition point of the propane.
  • a filling quantity between 500 g and 900 g, in particular between 650 g and 800 g, has proven to be particularly advantageous, as this also allows common e.g. B. two- or three-axis refrigerated shelf sizes can be operated with a cooling device that only has one refrigerant circuit. Surprisingly, it has been found that a certain filling quantity is advantageous, for example. B. can be used for a single-axis and also multi-axis cooling shelf, so that with a cooling device designed for this purpose with relatively minor modifications, such as. B. Evaporator length, refrigerated shelves of different lengths can be operated with the required cooling capacity. Since largely the same components can be used for different shelf lengths, this can have an advantageous effect on storage and installation measures. However, to optimize refrigerated shelves of different lengths despite similar filling quantities in the circuit, it can also be advantageous to install different components.
  • the refrigerant circuit has a low-pressure area with an operating pressure between 0.8 and 2.0 bar and a high-pressure area with an operating pressure between 20 and 30 bar.
  • the low-pressure region is located downstream of an expansion element and in particular includes the evaporator.
  • the high pressure area extends from the compressor to upstream of the expansion element and includes the condenser.
  • the compressor is arranged in the lower region of the rear wall group below the evaporator.
  • At least one fan to support the cold air flow is advantageously arranged above the evaporator in the rear wall group.
  • valves e.g. B. Solenoid valves, which are particularly protected against sparks and/or overheating, are advantageous in connection with propane.
  • a further advantageous measure in this regard is to dispense with a commonly used brine valve, as is 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. In this way, complex protective measures in connection with this valve can be dispensed with.
  • the control device is preferably arranged on, in particular in or on, the roof group, where it is not only visually inconspicuous but can also be placed in an easily accessible and protected manner.
  • a contribution to safe operation in connection with propane is that the control device is surrounded by a housing, for example a metal housing, in a shielding manner, which also offers protection against environmental influences such as moisture influences, in particular splash water, and damaging influences on electrical components.
  • a housing additionally shields electrical components in the control device from the refrigerant circuit carrying propane.
  • a further safety-related advantage arises if 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 propane of 470 °C to not cause ignition even in the unlikely event of propane escaping from the refrigerant circuit and the formation of an ignitable mixture.
  • the compressor is preferably designed as a fully hermetic and suction gas-cooled compressor, in particular as a scroll compressor.
  • the fully hermetic seal prevents propane from escaping into the environment.
  • the cooling prevents the compressor from overheating, which is beneficial both in terms of safety and in terms of the service life of the compressor. If the compressor is also located in the lowest area of the refrigerant circuit with respect to the geodetic height, this promotes the return transport of any oil that may be in the refrigerant circuit and can thus avoid places in the circuit where oil accumulates.
  • the electrical system used on the refrigerated shelf is at least partially protected against spark shock.
  • the electrical system of the refrigerated shelf includes, for example, the power supply of the individual components of the cooling device, but also the lighting, the roller blind motor, etc., as well as connections for controlling and/or regulating components, possibly data connections and possibly other electrical equipment. Areas in which sparks cannot be ruled out can, for example, be enclosed.
  • the measures are advantageous in that at least one safety contactor is arranged in a main circuit of the refrigerated shelf, which, for example, allows monitoring of the contacts in the contactor.
  • electrical components are also at least partially provided with a coating that suppresses sparks.
  • the components can be electrical components such as. B. capacitors and the like, but z. B. also surfaces of components in the cooling device or other mechanical components. It also helps to suppress sparks if the conductor track spacing of the high-voltage lines is at least 3 mm, e.g. B. between 3 and 5 mm, or at least 5 mm.
  • plug connections that prevent sparks can be used.
  • the use of spark-protected relays and power supplies is also an advantage, e.g. B. in the area of the control device.
  • the evaporator comprises a heat transfer device with aluminum fins and/or copper tubes, which have an inner diameter between 8 mm and 20 mm, preferably between 10 mm and 15 mm (e.g. 12 mm) and/or a maximum Have a volume between 3 l and 7 l (e.g. 4 l or 6 l).
  • a heat exchanger e.g. B. due to the used, Good heat-conducting materials and an easy-to-implement flat design, the cooling of the cold room is possible efficiently in conjunction with propane as a refrigerant.
  • propane propane
  • Other heat transfer devices that are suitable for use with propane would also be conceivable.
  • the condenser comprises a (for example soldered) plate heat exchanger with the countercurrent principle, on the warm side of which the flow of propane is up to 100 kg/h, preferably up to 80 kg/h and on The cold side of which uses a glycol/water mixture as a coolant in a secondary circuit.
  • a glycol/water mixture A mixture of water with 30-50 vol% (e.g. 38 vol%) propylene glycol has proven 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 cooling devices, prevents ice formation in the water.
  • the coolant absorbs the enthalpy removed from the cooling space by the propane and thus removes it from the refrigerant circuit.
  • Air cooling of the refrigerant circuit would also be conceivable, although air has poorer thermal conductivity than a water mixture.
  • the use of a glycol/water mixture in a secondary circuit allows several cooling units with their heat exchangers to be connected to the secondary circuit and the coolant in turn to be fed to a central recooling device where it is cooled down.
  • a recooling device can be arranged at a distance from the refrigerated shelf via a return line, in particular in a separate room, which brings advantages in terms of installation space and accessibility.
  • propane there is also the additional advantage that special safety measures, such as those described above, can be dispensed with in the recooling device due to its distance from the propane-carrying 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 from identical module frames with side frames having frame profiles, which carry the floor group, the rear wall group and the roof group with respective cladding parts and that the shelf modules with the in The rear wall group is provided with a common evaporator which extends over several or all shelf modules.
  • Refrigerated shelves of different lengths can be easily produced using a varying number of shelf modules arranged in a row.
  • a refrigerated shelf made up of several shelf modules, in which a cooling device with a refrigerant circuit is used, can in turn be integrated as a module into a refrigerated shelf arrangement made up of several refrigerated shelves. In this way, a high degree of flexibility can be achieved with regard to the structure.
  • the side frames preferably have a C-shape when viewed from the side.
  • Energy-efficient operation of the refrigerated shelf can be achieved by mounting a front roller blind driven by a roller blind motor in the front section of the roof group.
  • the cooling space can be closed or covered at times when it does not need to be accessible, so that the cooling capacity can be reduced to maintain the product cooling temperature.
  • the roller blind motor which is already advantageously positioned in the entire structure, also has a structure that prevents sparks and/or it is housed in a shielding encapsulation.
  • the structure that prevents sparks can be achieved, for example, as mentioned above, by plug connections that prevent sparks, appropriate coatings or other measures.
  • the encapsulation is advantageously gas-tight, so that in the event of a propane leak from the refrigeration circuit, no ignitable mixture gets into the housing.
  • roller blind motor can also advantageously be provided with motor overtemperature protection, so that the motor no longer operates if a certain temperature is exceeded.
  • Fig.1 shows a refrigerated shelf 1 suitable for installation in a sales room according to claim 1 with three shelf modules 1.1, 1.2, 1.3 (so-called three-axis version), the refrigerated shelf 1 comprising a cold room 4 accessible from the front on the back and above and below through wall groups.
  • the refrigerated shelf 1 can be combined with further refrigerated shelves 1 to form a refrigerated shelf arrangement, the refrigerated shelves 1 also being made of fewer shelf modules 1.1, 1.2, 1.3, e.g. B. two two-axis versions) or even just one (single-axis version), so that the length of the cooling shelf is preferably one or more times a module length (usually 1.25 m).
  • side walls are preferably also attached laterally on both sides of the refrigerated shelf 1 or the refrigerated shelf arrangement.
  • the front can be openly accessible or can be provided with at least one door element for special applications.
  • the front can be closed with a roller blind 63, which is arranged in the front roof area.
  • a cooling device 5 (cf. Fig. 2 ) integrated, namely a control unit 55.1 of a control device 55 (cf. Fig. 3 ) and fans 56, 57 to generate or support the necessary air flows (cf. 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 arrangement.
  • additional pressure switches are integrated into the refrigerant circuit, preferably one on the high-pressure side and one on the low-pressure side, which are approved for operation with flammable refrigerants.
  • pressure transmitters e.g.
  • a filter dryer and at least one sight glass on the high-pressure side are advantageously arranged in the refrigerant circuit.
  • the circuit pipes are preferably made of copper, with brazing being used as the connection technique.
  • the condenser 52 can be connected via the corresponding connecting lines 53.1 via a secondary circuit to a recooling device 54 with a heat exchanger, preferably located in another room.
  • a larger refrigerated shelf arrangement also includes several similar components of the cooling device 5, in particular several refrigerant circuits.
  • the refrigerated shelf 1 has only one refrigerant circuit in the case of a single-axis, two-axis or three-axis design.
  • Propane is used as a natural refrigerant in the refrigerant circuit, with the propane filling quantity being between 650 g and 800 g.
  • This quantity has a length between z. B. 1 m and 4 m have proven to be particularly advantageous.
  • propane For longer than e.g. B. three-axis refrigerated shelves, larger amounts of propane are also conceivable in a refrigerant circuit, but for safety reasons these should not exceed 1500 g. Smaller amounts are also part of the invention according to claim 1.
  • the refrigerated shelf 1 shown in the exemplary embodiments is particularly suitable for use with propane as a refrigerant in several respects, with some modifications being made compared to the variant operated with conventional refrigerant.
  • One reason for the good suitability is in particular the modular structure with high flexibility with regard to the component arrangement, both components of the cooling unit 4 and other components.
  • the structure also offers advantages in terms of efficiency, so that the relatively small amount of propane as a refrigerant, preferably 650 g and 800 g, is sufficient to apply the required cooling capacity in the cold room 4 of the refrigerated shelf 1, which in turn is beneficial for safety.
  • the structure of advantageous design variants of the refrigerated shelf 1 is described in more detail below.
  • each shelf module 1.1, 1.2, 1.3 are side frames 10 arranged on each side of the same, with a C-shaped shape in side view with a vertical profile 10.1 along the back, a lower horizontal profile 10.2 connected to it at the bottom and protruding forward, and an upper one at the top End section of the vertical profile 10.1 connected, forwardly 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 that is just as long or longer than the lower horizontal profile 10.2 can be advantageous, for example.
  • a support profile 10.4 is installed at a distance to the front between the lower and upper horizontal profiles 10.2, 10.3. Between the upper and lower end faces of the support profile 10.4 and the upper and lower horizontal profiles 10.3, 10.2 there are block-like heat-insulating elements, for. B. made of good heat-insulating, stable plastic to avoid thermal bridges from the outside to the inside, which also results in advantageous assembly aids.
  • the lower horizontal profile 10.2 is supported on feet 60, 61 with leveling options.
  • the two side frames 10 form longitudinal elements connecting them, e.g. B. longitudinal struts and/or paneling parts, stable module frames with frame profiles.
  • each shelf module 1.1, 1.2, 1.3 or the module frames support the floor group 11 by means of their lower horizontal profiles 10.2, the rear wall group 12 by means of their vertical profiles 10.1 and support profiles 10.4 and the roof group 13 by means of their upper horizontal profiles 10.3 and result in a stable structure with simple assembly steps.
  • they ensure a stable arrangement of several shelf modules 1.1, 1.2, 1.3 to form the refrigerated shelf 1 or the refrigerated shelf arrangement, with the refrigerated shelf 1 being able to be transported as a stable unit by means of a lifting device or vehicle.
  • the condenser 52 with corresponding connecting means 53 is arranged in or on the roof group 13 in an upper cooling component receptacle 13.30 formed there in the area of an upper cover 13.3, easily accessible from above or behind.
  • a pressure vessel of a dryer/collector unit of the condenser 52 can be pressurized to a maximum pressure of up to 3,000,000 Pa or higher. It has a high bursting pressure, for example more than 13,000,000 Pa, so that a large safety distance from the operating pressure for the use of propane is guaranteed.
  • 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 therefore significantly lower than that of conventionally used refrigerants, e.g. B. about half as large, depending on which conventional refrigerant is used.
  • the pressure vessel has an elongated, cylindrical shape, which means that the pressure vessel can be arranged in or on the roof group to save space.
  • the compressor 51 is arranged in the lower area of the rear wall group 12 behind an inner cover 12.1 which delimits the cooling space 4 to the rear in a receiving chamber (not shown) of a receiving device. In terms of geodetic height, it is in the lowest area of the refrigerant circuit. In the middle area of the rear wall group 12, the evaporator 50, 50 'is also arranged behind the inner cover 12.1 and mounted with means of the receiving device. How out 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 in a two- or three-axis design for all shelf modules 1.1, 1.2, 1.3 of the refrigerated shelf 1 together in just one, and although in the exemplary embodiment according to the Fig. 1 and 2 arranged in the right shelf module 1.1 (module b). and to the evaporator 50' via appropriate connecting lines Interposition of relevant intermediate members of the cooling device 5, such as expansion valve or throttle, are connected.
  • the arrangement in just one shelf module 1.1, 1.2, 1.3 is advantageous when using propane in that the line length can be reduced compared to an arrangement in different shelf modules, which can reduce the number of potential leaks.
  • a sufficient distance between the compressor 51 and the condenser 52 is ensured by the arrangement in different wall groups of the refrigerated shelf 1, namely the rear wall group 12 and the roof group 13, in order, for example, to avoid heat transfer from the compressor 51 to the condenser 52 and the formation of To prevent hot spots of excessive temperature development.
  • the floor assembly 11 delimits the cooling space 4 downwards with an overhead floor cover 11.1 and carries on its front a cover grille 11.10 provided with air passage holes, in particular air passage slots, and a front cover 11.4 with a bumper or decorative strip in the lower front edge area.
  • an advantageous embodiment of the refrigerated shelf 1 according to claim 1 is that only one shelf module 1.1 with all components of a cooling device except for the possibly provided central recooling device 54 is provided with relevant outward and return connecting lines 53.1 (module with expansion type b), while the remaining shelf modules of a refrigerated shelf arrangement are only provided with an evaporator 50, 50', the evaporator 50, 50' being advantageously designed as a continuous unit (modules of expansion type a). If the refrigerated shelf 1 consists of only one shelf module 1.1, this shelf module 1.1 advantageously forms a module of expansion type b.
  • the evaporator of the modules of expansion type a is connected via appropriate connecting means 53 including connecting lines 53.1 and optionally electrical cabling for signal transmission (sensors, control) and electrical energy supply connected to the other relevant components of the cooling device in the shelf module 1 of expansion type b.
  • connecting means 53 including connecting lines 53.1 and optionally electrical cabling for signal transmission (sensors, control) and electrical energy supply connected to the other relevant components of the cooling device in the shelf module 1 of expansion type b.
  • the electrical cabling and possibly other components are particularly secured against sparks, for example by plug connections that prevent sparks and/or special coatings.
  • the distances between the conductor tracks, in particular of high-voltage lines, which are used to power electrical components with higher power consumption, are also increased compared to the refrigerated shelf version with conventional refrigerant, e.g. B.
  • control device 55 which contains a large number of electrical components, is additionally surrounded or encapsulated by a housing and is thus shielded from the environment.
  • all shelf modules 1.1, 1.2, 1.3 can be prepared in the same way to accommodate all the necessary components of the cooling device 5 and also with pre-installed sections of the connecting lines 53.1 and connecting means for a simple, quick connection between the cooling components of the shelf modules and, if necessary, with the central recooling device 54 , so that modules One expansion type can be converted into a module of the other expansion type with little assembly effort.
  • more than just one shelf module of expansion type b can be present.
  • An evaporator 50, 50' that extends over several shelf modules 1.1, 1.2, 1.3 can also be relatively easily inserted subsequently between the relevant vertical profiles 10.1 and the support profiles 10.4 located at a distance in front of them and attached to the vertical profiles and/or an intermediate partition, in particular an intermediate wall 12.2 become.
  • the vertical profiles 10.1 in question and the support profiles 10.4 located at a distance in front of them advantageously form a continuous space that extends over several shelf modules 1.1, 1.2, 1.3.
  • Subsequent installation is carried out e.g. B. by inserting the heat exchanger of the evaporator 50, 50 'from one side parallel to the rear wall plane or from the front, after the relevant support profiles 10.4 have been removed, which are then reinstalled.
  • the special assembly method of the support profiles 10.4 results in easy installation and removal.
  • a one- or two-modular refrigerated shelf 1 can easily be extended to a two- or three-modular one simply by simply replacing the evaporator 50 to 50'.
  • Other essential components of the refrigerant circuit can be retained, since with a uniform filling quantity, e.g. B. is between 650 g and 800 g, both single-axis and multi-axis (e.g. two- or three-axis) refrigerated shelves can be operated efficiently, as has been shown in the inventors' studies.
  • FIG. 2 further shows, in the structure shown, only one shelf module 1.1 needs to be connected to the central recooling device 54 with the prepared connecting means 53, which contain, for example, quick couplings and controllable valves, while the remaining shelf modules 1.2, 1.3 only need to be connected via the integrated connecting means 53 in a simple manner be 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 (expansion type b), with brine or a glycol/water mixture preferably being used as a coolant in the secondary circuit.
  • brine or a glycol/water mixture preferably being used as a coolant in the secondary circuit.
  • a compact plate or tube heat exchanger in particular a brazed plate heat exchanger with the countercurrent principle, can be used.
  • Heat generated in the central recooling device 54 can be dissipated for other use of the thermal energy, as indicated by the arrow at the top right.
  • propane as a refrigerant, the central recooling device 54 has the additional advantage that, due to the distance from the refrigerated shelf 1, it is not subject to increased safety requirements and so no additional measures are required to secure it.
  • the base group 11, the rear wall group 12 and the roof group 13 are designed in multiple layers with interconnecting spaces formed therein to form channels for the air flow.
  • the air flow is effected or supported by fans 56, 57, which are designed, for example, as radial fans or diagonal fans and of which, in the exemplary embodiment shown, one is/are arranged in the lower region and one or two in the upper region of the rear wall group 12.
  • the upper fan or fans 56 cause or cause the air flow through the evaporator 50, 50 ', from bottom to top.
  • a portion of the cooling air flow formed by the evaporator 50, 50' is released again on the back of the inner cover 12.1 directed at the bottom and flows through ventilation slots in the inner cover 12.1 into the cooling chamber 4 in order to keep it at the required cooling temperature.
  • the fan or fans 56 arranged above the evaporator 50, 50' have proven to be particularly effective and favorable for safety, although the fan 56 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, for good transmission of the cooling power to the cooling space 4, which are also easy to handle and clean.
  • the plates of the floor cover 11.1 are advantageously segmented in the width direction and extend from the cover grid 11.10 in the front area of the floor group 11 to the lower area 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 and extend in the vertical direction over the entire width between the two side frames 10 of a shelf module 1.1, 1.2, 1.3, whereby several vertically stacked panels can be easily inserted or removed, for example. B. to expose, clean or install or remove relevant components of the cooling device 5.
  • tilt protection devices 62 which protrude downwards are attached to the lower end section of the vertical profiles 10.1, which advantageously adapt to uneven floors, e.g. B. allow by resilient or elastic intermediate elements and / or adjusting elements.
  • a lighting device 64 can be arranged in the front area of the floor group 11 and/or the roof group 13.
  • the lighting device 64 is advantageously designed as LED lighting with drivers tailored to it in order not to act as an ignition source in connection with the refrigerant used.
  • the roller blind 63 is advantageously arranged in the area, for. B. to close the cold room at the front outside of business hours and save cooling energy.
  • the motor for driving the roller blind 63 is also provided with means to prevent sparks. For example, it is housed in a protective encapsulation and/or transition points that generate sparks in the area of live rotating parts must be avoided.

Landscapes

  • 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)

Claims (14)

  1. Étagère réfrigérée (1) comportant au moins une unité composée de plusieurs groupes formant parois, à savoir un groupe formant fond (11), un groupe formant paroi arrière (12) et un groupe formant paroi de recouvrement (13), lesquels délimitent un espace réfrigéré (4) en bas, à l'arrière et en haut, et comportant un dispositif de réfrigération (5) présentant un circuit de réfrigérant et comprenant comme composants au moins un évaporateur (50), un condenseur (52) et un dispositif de commande (55) électrique et contenant du propane comme réfrigérant, dans lequel le dispositif de réfrigération (5) présente comme autres composants un compresseur (51),
    caractérisée en ce
    que du propane comportant une capacité de remplissage comprise entre 300 g et 1 500 g est contenu dans le circuit de réfrigérant en tant que réfrigérant,
    que le compresseur (51) et le condenseur (52) sont disposés à distance l'un de l'autre dans des groupes formant parois différents, dans lequel le compresseur (51) est disposé dans la zone inférieure du groupe formant paroi arrière (12) en dessous de l'évaporateur (50) et le condenseur (52) est disposé sur ou dans le groupe formant paroi de recouvrement (13) et un réservoir sous pression d'une unité de séchage/de collecte du condenseur (52) possède un volume compris entre 0,4 l et 1,4 l,
    que l'évaporateur (50) est disposé dans le groupe formant paroi arrière (12) et que le circuit de réfrigérant présente une zone basse pression comportant une pression de fonctionnement comprise entre 80 000 Pa et 200 000 Pa et une zone haute pression comportant une pression de fonctionnement comprise entre 2 000 000 Pa et 3 000 000 Pa.
  2. Étagère réfrigérée (1) selon la revendication 1,
    caractérisée en ce
    que du propane comportant une capacité de remplissage comprise entre 500 g et 900 g est contenu dans le circuit de réfrigérant en tant que réfrigérant.
  3. Étagère réfrigérée (1) selon l'une des revendications précédentes,
    caractérisée en ce
    qu'au moins une soufflante (56) destinée à soutenir le flux d'air froid est disposée au-dessus de l'évaporateur (50) dans le groupe formant paroi arrière (12).
  4. Étagère réfrigérée (1) selon la revendication 3,
    caractérisée en ce
    que la ou les soufflantes (56, 57) présentent un moyen de protection contre la surchauffe du moteur.
  5. Étagère réfrigérée (1) selon l'une des revendications précédentes,
    caractérisée en ce
    que le dispositif de commande (55) est disposé au niveau du groupe formant paroi de recouvrement, en particulier dans ou sur le groupe formant paroi de recouvrement (13), et/ou
    que le dispositif de commande (55) est entouré d'un boîtier de manière à être protégé.
  6. Étagère réfrigérée (1) selon l'une des revendications précédentes,
    caractérisée en ce
    que les composants du dispositif de réfrigération (5) disposés dans le circuit de réfrigérant présentent, pendant le fonctionnement, une température de surface maximale inférieure à 300 °C, de préférence inférieure à 160 °C.
  7. Étagère réfrigérée (1) selon l'une des revendications précédentes,
    caractérisée en ce
    que le compresseur (51) est conçu comme un compresseur entièrement hermétique et réfrigéré par gaz d'aspiration, en particulier un compresseur à spirale, et
    que le compresseur (51) est disposé dans la zone la plus basse du circuit de réfrigérant par rapport à la hauteur géodésique.
  8. Étagère réfrigérée (1) selon l'une des revendications précédentes, caractérisée en ce
    que le système électrique utilisé sur l'étagère réfrigérée (1) est au moins partiellement protégé contre les étincelles.
  9. Étagère réfrigérée (1) selon la revendication 8,
    caractérisée en ce
    qu'au moins un contacteur de sécurité est disposé dans un circuit principal de l'étagère réfrigérée (1),
    que les pièces électriques sont au moins partiellement pourvues d'un revêtement supprimant les étincelles,
    que les distances entre les pistes conductrices des lignes haute tension sont d'au moins 3 mm et/ou
    que des connecteurs évitant les étincelles sont utilisés.
  10. Étagère réfrigérée (1) selon l'une des revendications précédentes,
    caractérisée en ce
    que l'évaporateur (50) comprend un dispositif de transfert de chaleur comportant des lamelles en aluminium et/ou comportant des tubes en cuivre qui présentent des diamètres intérieurs compris entre 10 mm et 15 mm et/ou un volume maximal compris entre 3 l et 7 l.
  11. Étagère réfrigérée (1) selon l'une des revendications précédentes,
    caractérisée en ce
    que le condenseur (51) comprend un échangeur de chaleur à plaques à contrecourant, sur le côté chaud duquel le débit de propane va jusqu'à 100 kg/h, de préférence jusqu'à 80 kg/h, et sur le côté froid duquel un mélange glycol/eau est utilisé comme réfrigérant dans un circuit de réfrigération secondaire.
  12. Étagère réfrigérée (1) selon l'une des revendications précédentes,
    caractérisée en ce
    que l'étagère réfrigérée (1) comprend au moins deux modules d'étagère (1.1, 1.2, 1.3) pouvant être alignés l'un à côté de l'autre, lesquels sont construits à partir de cadres latéraux (10) présentant des bâtis de module identiques comportant des profilés de cadre, lesquels cadres latéraux supportent le groupe formant fond (11), le groupe formant paroi arrière (12) et le groupe formant paroi de recouvrement (13) avec des parties d'habillage respectives et
    que les modules d'étagère (1.1, 1.2, 1.3) sont pourvus de l'évaporateur (50) commun disposé dans le groupe formant paroi arrière (12), lequel évaporateur s'étend sur plusieurs modules d'étagère ou sur tous les modules d'étagère (1.1, 1.2, 1.3).
  13. Étagère réfrigérée (1) selon l'une des revendications précédentes,
    caractérisée en ce
    que les cadres latéraux (10) présentent une forme en C en vue latérale.
  14. Étagère réfrigérée (1) selon l'une des revendications précédentes,
    caractérisée en ce
    qu'un store frontal (63) entraîné par un moteur de store est reçu dans la section avant du groupe formant paroi de recouvrement (13) et
    que le moteur de store possède une structure évitant les étincelles et/ou est logé dans un encapsulage de protection.
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

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

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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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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
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Also Published As

Publication number Publication date
CN107532838B (zh) 2021-09-21
EP3311083A1 (fr) 2018-04-25
WO2016202486A1 (fr) 2016-12-22
DE102015109611A1 (de) 2016-12-22
AR105021A1 (es) 2017-08-30
EP3311083C0 (fr) 2024-03-27
CN107532838A (zh) 2018-01-02
US20180146799A1 (en) 2018-05-31
BR112017018256A2 (pt) 2018-05-15
US10368659B2 (en) 2019-08-06

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