EP2996517B1 - Améliorations dans ou relatives à des appareils d'affichage réfrigérés - Google Patents

Améliorations dans ou relatives à des appareils d'affichage réfrigérés Download PDF

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Publication number
EP2996517B1
EP2996517B1 EP14731326.6A EP14731326A EP2996517B1 EP 2996517 B1 EP2996517 B1 EP 2996517B1 EP 14731326 A EP14731326 A EP 14731326A EP 2996517 B1 EP2996517 B1 EP 2996517B1
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EP
European Patent Office
Prior art keywords
shelf
support
duct
return
wall
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
EP14731326.6A
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German (de)
English (en)
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EP2996517A1 (fr
Inventor
Edward Hammond
Ian Wood
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Applied Design and Engineering Ltd
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Applied Design and Engineering Ltd
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Priority to PL14731326T priority Critical patent/PL2996517T3/pl
Publication of EP2996517A1 publication Critical patent/EP2996517A1/fr
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    • 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
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • A47F3/0447—Cases or cabinets of the open type with forced air circulation with air curtains
    • 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
    • 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
    • A47F3/0469—Details, e.g. night covers
    • 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
    • A47F3/06—Show cases or show cabinets with movable or removable shelves or receptacles
    • 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
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • A47F2003/046—Cases or cabinets of the open type with forced air circulation with shelves having air ducts

Definitions

  • This invention relates to refrigerated display appliances, exemplified in this specification by refrigerated multi-deck display cases or cabinets that are used in retail premises for cold-storage, display and retailing of chilled or frozen food and drink products.
  • the invention is not limited to retail food and drink cabinets.
  • the principles of the invention could be used to display other items that require cold storage, such as medicines or scientific items that may be prone to degradation.
  • the principles of the invention are particularly advantageous for retail use.
  • Doors put a barrier between the shopper and the displayed items, which can reduce sales very significantly. Doors also create a barrier, and additional work, for staff tasked with restocking, cleaning and maintaining the cabinets, which adds significantly to retail overheads. Also, wider aisles may be needed to allow shoppers to open doors and to manage trolleys, which reduces the sales return per square metre of retail space. Additionally, heat may need to be applied to the doors to reduce fogging and misting following door opening, which increases energy consumption.
  • doors do not work effectively to retain cold air for the simple reason that shoppers and staff in busy retail premises will open the doors frequently and sometimes for extended periods. Whenever the doors are open, cold dense air will spill out. The cold air lost from inside the cabinet will inevitably be replaced by ambient air. Consequently, in real conditions, the addition of doors to a cabinet does not significantly improve energy consumption, temperature control and ingress of ambient air.
  • Ingress of ambient air is undesirable during the operation of any refrigerated display appliance.
  • the heat of incoming ambient air increases cooling duty and hence the energy consumption of the appliance.
  • the moisture that the air carries causes condensation, which may also lead to icing. Condensation is unsightly, offputting and unpleasant for shoppers, may threaten reliable operation of the appliance and promotes microbial activity which, like all life, requires the presence of water.
  • the incoming ambient air will itself contain microbes, dust and other undesirable contaminants.
  • open-fronted refrigerated display cabinets employ a large downwardly-projected refrigerated air curtain extending between discharge and return air terminals from top to bottom over an access opening defined by the open front face of the cabinet.
  • the purposes of the air curtain are twofold: to seal the access opening in an effort to prevent cold air spilling out from the product display space behind; and to remove heat from the product display space that is gained radiantly through the access opening and via infiltration of ambient air into the product display space.
  • a conventional air curtain requires high velocity to remain stable enough to seal the access opening of the cabinet. Unfortunately, however, high velocity increases the rate of entrainment of ambient air into the air curtain. Entrainment of ambient air drives infiltration of the ambient air into the product display space and contributes to spillage of cold air from the appliance. Also, a high-velocity stream of cold air is unpleasant for a shopper to reach through to access the product display space behind the air curtain.
  • Additional cooling air is typically supplied via a perforated back panel behind the product display space of the cabinet. That additional cooling air is bled from ducts supplying the air curtain to provide more cooling at each level within that space and to support the air curtain. This allows the air curtain velocity to be reduced and so reduces the entrainment rate of ambient air.
  • conventional cabinets can suffer from ambient air entrainment rates as high as 80% in real conditions, causing excessive energy consumption and uncomfortably cold aisles.
  • Back panel flow has the disadvantage that the coldest air blows over the coldest items at the back of the shelves, which are subject to the lowest heat gain because they are furthest from the access opening. This undesirably increases the spread of temperature across items stored in the product display space. In this respect, it is vital that tight temperature control is maintained throughout the product display space of the cabinet. Regions of a cabinet warmer than the desired temperature will suffer from faster food degradation. Conversely, regions of a cabinet colder than the desired temperature may cycle above and below the freezing point, again promoting faster food degradation.
  • the levels within a refrigerated display cabinet are typically defined by one or more shelves, which may for example comprise solid or perforated panels or open baskets. Shelves partition the interior of the cabinet into a stack of two or more smaller product display spaces. Shelves and their associated product display spaces may also be partitioned into side-by-side columns. Each product display space is accessible through a respective open frontal access opening. Specifically, each shelf defines an upper access opening above the shelf and a lower access opening below the shelf affording access to refrigerated items in respective product display spaces in a cold-storage volume above and below the shelf.
  • At least one forwardly-positioned discharge outlet communicates with a supply duct to project cold air as an air curtain across an access opening.
  • At least one forwardly-positioned return inlet communicates with a return duct to receive air from the air curtain.
  • the discharge outlet projects cold air as an air curtain across the lower access opening below the shelf and the return inlet receives air from another air curtain discharged above the shelf across the upper access opening above the shelf.
  • an air curtain it is possible, albeit unconventional, for an air curtain to flow upwardly across an access opening from bottom to top.
  • the discharge outlet projects cold air as an air curtain across the upper access opening and the return inlet receives air from another air curtain discharged below the shelf across the lower access opening.
  • the present invention also encompasses this possibility.
  • WO 2011/121284 teaches a ducted shelf whose frontal structure comprises a downwardly-facing discharge opening or outlet and an upwardly-facing return opening or inlet. Each of those openings extends parallel to the shelf front and communicates with a respective duct stacked one above the other in the shelf or lying one beside the other in the shelf to supply air to the outlet and to receive air from the inlet.
  • GB 950,480 discloses another ducted shelf.
  • the front of a ducted shelf comprises a downwardly-facing discharge opening and an upwardly-facing return opening, each communicating with a respective duct stacked one above the other in the shelf.
  • Airflow management features including baffles, risers and flow straighteners are associated with these openings to ensure good air curtain performance.
  • ducted shelves comprise more components than non-ducted shelves and therefore tend to be considerably bulkier and heavier. This presents challenges during installation, adjustment and maintenance if large and heavy assemblies must be lifted and manoeuvred. For example, health and safety guidelines on manual handling dictate that male workers may lift no more than 20kg at or above elbow height, even close to the body. This decreases to 5kg when the arms are extended at or above shoulder height. These limits are even lower for female workers.
  • the invention resides in a ducted shelf assembly according to the appended claim 1.
  • the assembly may further comprise a top shelf component, which may comprise a top plate of the shelf that overlies the, or each, duct element.
  • the top shelf component may comprise a shelf front strip that is insulated, heated or of low thermal conductivity and that is arranged to cover a front edge of the, or each, duct element.
  • the assembly comprises a supply duct element and a return duct element.
  • the assembly comprises separate upper and lower supports, each being separately engageable with support formations to hold the shelf assembly at a desired height against a wall of a display appliance, wherein the duct element is separate from and positionable between the lower support and the upper support, the duct element then being supported by the lower support and retained by the upper support.
  • the lower support and the upper support are separately and successively engageable with the support formations upon assembly of the structure against the wall.
  • the supply duct element and the return duct element are preferably in layered face-to-face relation and are held together by upper and lower supports.
  • upper supports positionable above the duct element and/or lower supports positionable below the duct element comprise sealing elements arranged to seal against the wall of the display appliance.
  • The, or each, sealing element is suitably arranged to seal against the, or each, duct element, and preferably has a wall that extends vertically to an extent that enables sealing against the wall of the display appliance to be maintained if a support is engaged with support formations at a different level on the wall.
  • the invention extends to a ducted-shelf air curtain display unit, comprising at least one ducted shelf assembly of the invention.
  • the unit suitably comprises an open-fronted cabinet having a display space bounded by an upright wall, that wall being disposed between the display space and at least one riser duct for the supply and/or return of air;
  • the unit of the invention suitably comprises an upper sealing element extending above the shelf to above an upper edge of the port and a lower sealing element extending below the shelf to below a lower edge of the port.
  • the unit may be arranged such that engagement of a support with the upright wall presses the sealing element against the upright wall.
  • the inventive concept extends to a method of assembling a ducted shelf assembly according to claim 1 in a display appliance, comprising:
  • the method of the invention preferably further comprises attaching a second support to the upright wall to retain the, or each, duct element on the first support.
  • Supply and return duct elements may be stacked on the first support before attaching the second support to the upright wall.
  • the duct element is coupled to a riser duct of the appliance via a port in the upright wall.
  • Seals may be effected between the first support and the upright wall and between the first support and the or each duct element. Seals may also be effected between the second support and the or each duct element, and between the second support and the upright wall. Indeed, the seals may be effected simply by assembling together a support and the duct element on the upright wall.
  • FIG. 1 this shows a refrigerated integrated multi-cellular display appliance 10.
  • the appliance 10 has a bottom-mounted evaporator 12 fed with air by supply fans 14, although other arrangements are possible for the production and circulation of cold air.
  • cold air from the evaporator 12 is supplied to a plurality of airflow-managed cells 16A, 16B, 16C that are stacked in a vertical array or column and are all disposed within a single insulated cabinet 18.
  • there are three cells in the stack namely a top cell 16A, an inner cell 16B and a bottom cell 16C.
  • the cells 16A, 16B, 16C are separated here by two ducted shelves 20 constructed in accordance with the invention.
  • the cells 16A, 16B, 16C can be of different heights and may be arranged to store items at different temperatures to reflect storage requirements for various items.
  • the shelves 20 could be fixed but are height-adjustable in this example, as shown by the dashed lines in Figure 1 , so that the relative heights of the cells 16A, 16B, 16C can be adapted to suit different retail requirements.
  • the ducted shelves 20 each comprise a sandwich of a supply duct 22 and a return duct 24.
  • the shelves 20 subdivide the internal volume of the cabinet 18 into a plurality of product display spaces stacked one atop another, each in its own airflow-managed cell 16A, 16B, 16C.
  • Each shelf 20 defines the top wall of a lower cell in the stack and the bottom wall of an adjacent upper cell in the stack.
  • the top wall of the top cell 16A is defined by an additional supply duct 22 above a top inner panel of the cabinet 18.
  • the bottom wall of the bottom cell 16C is defined by an additional return duct 24 beneath a bottom inner panel of the cabinet 18 that also serves as an additional shelf for the display of refrigerated items.
  • the additional supply duct 22 and the additional return duct 24 may be identical to those used in the shelves 20.
  • the ducted shelves 20 lie closely against the back inner panel 26 and the side walls 28 of the cabinet 18, to discourage airflow around those edges of the shelves 20. Seals may be provided along those edges of the shelves 20 if required.
  • Figure 1 also shows optional non-ducted intermediate shelves 30, one at an intermediate level in each cell 16A, 16B, 16C and set back from the front of the ducted shelves 20, to facilitate display of different types of food products and to make best use of the available space.
  • One or more of the intermediate shelves 30 may be perforated or slotted to improve air movement in the cells 16A, 16B, 16C.
  • the intermediate shelves 30 need not seal against the back inner panel 26 or the side walls 28 of the cabinet 18.
  • Each cell 16A, 16B, 16C is generally in the form of a hollow cuboid or box enclosing a correspondingly-shaped product display space.
  • Front access openings 32 give unhindered reach-in access to any items in the product display spaces defined by the cells 16A, 16B, 16C.
  • each access opening 32 is sealed by a generally-vertical air curtain 34 that flows downwardly in front of the associated cell 16A, 16B, 16C.
  • the air curtain 34 extends between a downwardly-facing discharge air grille (DAG) or discharge terminal 36 and an upwardly-facing return air grille (RAG) or return terminal 38. Cooled air is supplied through a supply duct 22 to the DAG 36, which projects the air curtain 34, and is returned through a return duct 24 via the RAG 38, which receives air from the air curtain 34.
  • the air received from the air curtain 34 will inevitably include some entrained ambient air, from which heat and moisture must be removed during recirculation within the appliance 10, although the arrangement illustrated will greatly reduce the rate of entrainment in comparison with standard designs.
  • the riser ducts 40, 42 extend upwardly between the back inner panel 26 and the adjacent insulated rear wall of the cabinet 18.
  • one supply riser duct 40 is disposed between two return riser ducts 42.
  • Figure 2 also shows ducted shelves 20 and riser ducts 40, 42 of two columns of cells 16 disposed side-by-side in the common insulated cabinet 18, divided here by a vertical partition 44 that is suitably of transparent material, such as perspex or tempered glass, for ease of viewing.
  • the partition 44 lies closely against, and is preferably sealed to, the back inner panel 26.
  • the partition 44 extends from the back inner panel 26 substantially the full depth of the shelves 20 from front to rear. Preferably, as shown, the partition 44 extends slightly forward of the front edges of the shelves 20. The partition 44 prevent air flows from spilling from one column to the next and possibly disrupting the air curtain dynamics of adjacent cells.
  • the front edge regions of the partition 44 and the shelves 20 may be insulated and/or heated to fight condensation. It is also possible for the front edge regions of the partition 44 and the shelves 20 to be of a low-conductivity material and/or to have a high-emissivity finish.
  • the partition 44 may be removed to increase the effective display area.
  • each column has pair of keybars 46 that extend vertically on the outer sides of the return riser ducts 42.
  • the keybars 46 support the weight of the shelves 20 and provide a vertical array of slots into which spigots at the back of a shelf 20 can locate at any suitable height.
  • cold air is ducted from the evaporator 12 to each cell 16A, 16B, 16C and warmer return air is returned from each cell 16A, 16B, 16C to the coil 14 for cooling, drying, optional filtering and recirculation.
  • Air is blown through the evaporator 12 by the fans 14 and then propelled up the central supply riser duct 40. From there, the air enters the supply ducts 22 in the ducted shelves 20 and at the top of the cabinet 18 to be projected as a stack of air curtains 34 through the DAGs 36, one per cell 16A, 16B, 16C.
  • the return air from the air curtains 34 is returned via the RAGs 38 and the return ducts 24 in the shelves 20 and at the bottom of the cabinet 18, to enter the return riser ducts 42 on each side of the central supply riser duct 40.
  • the return air flows downwardly in those return riser ducts 42 under the suction of the fans 14 to enter the evaporator 12 again.
  • ports 48 in the back inner panel 26 leading to the supply riser duct 40 and the return riser ducts 42 require ports 48 in the back inner panel 26 leading to the supply riser duct 40 and the return riser ducts 42.
  • Various port arrangements are disclosed in WO 2011/121285 and so need no further elaboration here.
  • those ports 48 are spaced in vertical arrays aligned with the parallel vertically-extending supply riser duct 40 and the return riser ducts 42, to allow for the shelves 20 to be removed and optionally relocated at different heights.
  • those ports 48 are open only when a shelf 20 is coupled with them to reduce unwanted spillage of cold air into the cabinet 18.
  • WO 2011/121285 discloses ways in which the ports 48 could be closed off when not in use; other arrangements are described in parallel patent applications filed by the Applicant.
  • FIGS 3a, 3b , 4a and 4b show how separate supply and return duct components or elements 50, 52 respectively are assembled to form a ducted shelf 20 shown in Figures 1 and 2 .
  • the supply and return duct components 50, 52 are hollow plate-like structures that are laid together in face-to-face relation as part of a ducted shelf 20.
  • the supply and return duct components 50, 52 have supply and return connectors 54, 56 respectively on their rear edges for connection to respective riser ducts 40, 42 of the appliance 10 shown in Figures 1 and 2 .
  • the connectors 54, 56 are rearwardly-projecting vertically-enlarged extensions of the duct components 50, 52.
  • the connectors 54, 56 employ inclined or curved branch connections to promote even airflow and to minimise static pressure losses.
  • Blade connections 58 at the rear of the connectors 54, 56 facilitate a plug-in arrangement between the connectors 54, 56 and the riser ducts 40, 42 as will be described below in relation to Figure 5 .
  • the extensions of the respective duct components 50, 52 defining the connectors 54, 56 are offset laterally so as to lie side-by-side and at the same general horizontal level.
  • the supply connector 54 is nested between the return connectors 56 when the duct components 50, 52 are assembled together in face-to-face relation as shown in Figures 3b and 4b .
  • Inclined or curved transition sections between the duct components 50, 52 and the connectors 54, 56 promote even airflow and minimise static pressure losses as air flows through a throat 60 of reduced duct cross-sectional area.
  • This throat 60 creates a relatively high static pressure, which is desirable to balance airflows between shelves.
  • High-velocity contractions defined by the throats 60 and the lateral offset of the connectors 54, 56 reduce duct sizes and help to make airflow more uniform.
  • Figure 5 shows how the blade connections 58 at the rear of the connectors 54, 56 plug in to the riser ducts 40, 42 to couple the riser ducts 40, 42 to the supply and return ducts 22, 24 of a ducted shelf 20.
  • the blade connections 58 have resilience that helps them to seal against the side walls 62 of the riser ducts 40, 42 as the blade connections 58 slide into place.
  • Figure 5 also shows one of the pair of keybars 46 that extend vertically on the outer sides of the return riser ducts 42 to support the weight of the shelves 20. That keybar 46 is also shown in Figure 6 , which corresponds to Figure 5 but additionally shows a spigot 64 projecting rearwardly from the shelf 20 and engaged within a slot in the keybar 46.
  • the keybars 46 provide a vertical array of slots into which spigots 64 of a shelf 20 can locate at any suitable height, to allow the heights of the shelves 20 to be adjusted as required.
  • Symmetry, balance and airtightness are important aspects of the airflow-managed cells 16A, 16B, 16C used in the invention. Symmetry arises to a considerable extent from the advantageous modularity of the design. In relation to balance, testing has shown that static pressure losses in the vertical riser ducts 40, 42 are insignificant in comparison with the static pressure losses in the ducted shelves 20 and in the throats 60 leading to or within the shelves 20. Consequently, the relative positions of different shelves 20 along the riser ducts 40, 42 will have little bearing on the system balance. This means that air will flow substantially equally to and from each shelf 20 regardless of its vertical position along the riser ducts 40, 42.
  • ducted shelves 20 may be moved from the mid position by plus or minus 50mm in these examples. This enables various shelf configurations, some of which are illustrated here.
  • Figure 7a shows a total of six shelves comprising an upper ducted shelf 20 and a lower ducted shelf 20, each shown here at mid positions, plus three intermediate shelves 30, one per cell 16A, 16B, 16C, plus a bottom shelf 66 defined by the bottom inner panel of the cabinet 18.
  • FIG 7b there are four shelves comprising an upper ducted shelf 20 in a raised position and a lower ducted shelf 20 in a lowered position to maximise the depth of the inner cell 16B, plus one intermediate shelf 30 in that inner cell 16B, plus the bottom shelf 66.
  • the top cell 16A and the bottom cell 16C do not contain intermediate shelves 30 in this example.
  • Figure 7c shows five shelves, comprising the bottom shelf 66 plus an upper ducted shelf 20 in a lowered position and a lower ducted shelf 20 in a raised position. This minimises the depth of the inner cell 16B and maximises the depth of the top cell 16A and the bottom cell 16C. In this example, the top cell 16A and the bottom cell 16C contain intermediate shelves 30 but the inner cell 16B does not.
  • Figure 7d shows a total of six shelves, namely an upper ducted shelf 20 and a lower ducted shelf 20, plus three intermediate shelves 30, one per cell 16A, 16B, 16C, plus a bottom shelf 66.
  • the upper ducted shelf 20 and the lower ducted shelf 20 are each shown in raised positions to maximise the depth of the bottom cell 16C.
  • Figure 8 shows a lower support 68 being attached in front of the back inner panel 26 that conceals the riser ducts 40, 42.
  • the lower support 68 comprises side brackets with an inverted L-shape in side view, comprising a horizontal arm 70 for supporting other components of a ducted shelf 20 and a vertical leg 72 that fixes the lower support 68 to the keybars 46 shown in Figures 5 and 6 .
  • the leg 72 has a vertical array of rearwardly-projecting downwardly-opening hook-type spades serving as spigots 64 to fit into slots in the keybars 46.
  • the lower support 68 comprises two side brackets, one to each side of a shelf 20, connected by an upright resilient bottom seal plate 74 to form a single fabricated item that can be hooked into the keybars 46 via the spigots 64.
  • the bottom seal plate 74 has a vertical lower portion 76 that is integral with an upper portion 78, which is inclined forwardly and upwardly.
  • Figure 8 shows a port 80 provided in the back inner panel 26 that leads to the riser ducts 40, 42.
  • the bottom seal plate 74 overlaps the bottom edge of the port 80. In this way, the lower portion 76 of the bottom seal plate 74 seals against the back inner panel 26 immediately beneath the port 80.
  • Figure 9 shows the supply duct component 50 being placed onto the arms 70 of the lower supports 68.
  • the supply connector 54 at the rear of the supply duct component 50 is coupled to the riser supply duct 40 via the blade connections 58 at the rear of the connector 54 as shown in Figures 5 and 6 .
  • the supply connector 54 has a lower face 82 that is inclined upwardly and forwardly and seals against the similarly-inclined upper portion 78 of the seal plate 74.
  • Figure 10 shows the next step in the assembly process, namely the addition of the return duct component 52 being placed on top of the supply duct component 50.
  • the return connector 56 at the rear of the return duct component 52 lies beside the supply connector of the supply duct component, and is similarly coupled to the riser supply duct 42 via the blade connections 58 at the rear of the connector 56.
  • the return connector 56 also has a lower face 84 that is inclined upwardly and forwardly and also seals against the upper portion 78 of the seal plate 74.
  • Figures 11 and 12 show the addition of the final component of the ducted shelf 20, namely an upper support 86.
  • the upper support 86 comprises two side brackets, each with an L-shape in side view, one to each side of the shelf 20.
  • Each bracket comprises a horizontal arm 88 supporting a horizontal top tray 90 that extends between the upper supports 86 and covers the entire shelf 20, and an upright member 92 that fixes the upper support 86 to the keybars 46 shown in Figures 5 and 6 .
  • the upright member 92 has a vertical array of rearwardly-projecting upwardly-opening cam-type spades serving as spigots 64 to fit into slots in the keybars 46.
  • the side brackets of the upper support 86 are also connected by an upright resilient top seal plate 94 to form a single fabricated item that can be hooked into the keybars 46 via the spigots 64.
  • the top seal plate 94 overlaps the top edge of the port 80. In this way, the top seal plate 94 seals against the back inner panel 26 immediately above the port 80.
  • the tray 90 has a transparent front 96, suitably of perspex, and supports a front finisher 98 that is shaped to fit around the front edges of the return duct component 52 and the supply duct component 50 beneath.
  • the finisher 98 is suitably insulated, heated or of low thermal conductivity so as to combat condensation.
  • the rear of the tray 90 is also seen from above in Figure 6 closing a gap in front of the keybar 46.
  • Flexible sides of the tray 90 help to seal air inside a cell 16A, 16B, 16C that is partially defined by the shelf 20.
  • Figure 13 shows how the shelf 20 may be adjusted vertically by moving the spigots 64 into different levels of slots in the keybars 46.
  • the upper support 86 has not yet been fitted but the lower support 68 is in place, together with the supply duct component 50 and the return duct component 52.
  • the shelf 20 is shown here adjusted to a raised position with respect to the back inner panel 26. It will be apparent that the overlap between the bottom seal plate 74 and the back inner panel 26 beneath the port 80 has been reduced but that a seal has been maintained between the bottom seal plate 74 and the back inner panel 26.
  • the upper support 86 is fitted, there will be an increased overlap between the top seal plate 94 and the back inner panel 26 above the port 80. Again, therefore, a seal will be maintained between the top seal plate 94 and the back inner panel 26 above the port 80.
  • the overlap between the top seal plate 94 and the back inner panel 26 above the port 80 is sufficient to allow the shelf 20 to be adjusted into a lowered position while maintaining sealing between the top seal plate 94 and the back inner panel 26 above the port 80.
  • Figure 14 shows a variant 100 of the lower support 68, having cross-members 102 extending between the arms 70 and legs 72 of the side brackets 102.
  • This view omits the bottom seal plate for clarity.
  • the design loading for supermarket shelves is in the order of 250 kg/m 2 to take the weight of bottles, cartons and other heavy items that may be densely packed on them. Consequently, the cross-members 102 provide structural integrity to meet the demands placed on shelves in a supermarket environment.
  • the principal components of the shelf 20 are suitably made of light-gauge materials of minimum thickness, utilising bending and folding to achieve strength, rigidity, and straightness. Whilst painted mild steel could be used for most fabricated parts, aluminium could be used for adjustable or removable shelves to reduce their weight and so to make it easier to handle them manually.
  • a potentially bulky and heavy ducted shelf is broken down into easily-handled elements that can, in effect, be hung sequentially at a desired height and location on a wall of the display appliance. Placing the lower support creates a platform for the subsequently-added duct elements. This eases the installation operation, reduces the risk of injury to workers or damage to equipment and preferably avoids the need for additional manpower or lifting apparatus.
  • Disassembling the shelf is a simple reverse process that enables easy access to and replacement of components. Disassembly also divides the weight of the shelf into easily-handled components that can be reassembled quickly at a desired alternative height or position.
  • One or both of the side walls of the cabinet could be transparent to enhance visibility of the items displayed in the product display spaces, in which case the side walls are suitably of tempered glass and double- or triple-glazed to maintain a degree of insulation.
  • the appliance need not have an internal refrigerator engine if cold air is produced elsewhere, for example in a remote fan coil unit, and pumped to the appliance.
  • the refrigerator engine can be included in the cabinet as an integral unit or cooling can be supplied remotely from a typical supermarket refrigeration pack unit. Local cooling necessitates a drainage system for condensate water.
  • a return duct in a ducted shelf could be inclined downwardly and rearwardly to fall toward the rear of the cabinet, where it may lead water to a drainage system provided for the evaporator to reject water from the cabinet.
  • cooling coils and fans may be located behind the cells but could instead be situated to the top, bottom or sides of the cells.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Claims (15)

  1. Ensemble étagère à gaine (20) comprenant :
    au moins un support (68) qui peut être mis en prise avec des formations de support d'un appareil d'affichage pour maintenir l'ensemble étagère à une hauteur souhaitée contre une paroi (26) de l'appareil d'affichage ;
    un élément de gaine d'alimentation (22, 50) comprenant une grille de refoulement d'air (36) pour projeter de l'air froid à l'avant de l'élément de gaine d'alimentation sous forme de rideau d'air (34) et un raccord d'alimentation (54) pour une communication avec une gaine montante d'alimentation au niveau du bord arrière de l'élément de gaine d'alimentation ; et
    un élément de gaine de reprise (24, 52) comprenant une grille de reprise d'air (38) pour recevoir de l'air à l'avant de l'élément de gaine de reprise à partir d'un rideau d'air et un raccord de reprise (56) pour une communication avec une gaine montante de reprise au niveau du bord arrière de l'élément de gaine de reprise ;
    dans lequel l'élément de gaine d'alimentation et l'élément de gaine de reprise sont séparés l'un de l'autre et sont séparés du support et peuvent être positionnés sur celui-ci, l'élément de gaine de reprise pouvant être placé amovible au-dessus de l'élément de gaine d'alimentation, les éléments de gaine étant alors supportés par le support.
  2. Ensemble selon la revendication 1, comprenant en outre un composant d'étagère supérieure, facultativement dans lequel le composant d'étagère supérieure comprend une plaque supérieure de l'étagère qui recouvre les éléments de gaine.
  3. Ensemble selon la revendication 2, dans lequel le composant d'étagère supérieure comprend une bande avant d'étagère qui est isolée, chauffée ou de faible conductivité thermique et est agencée pour couvrir un bord avant d'au moins l'un des éléments de gaine.
  4. Ensemble selon l'une quelconque des revendications précédentes et comprenant des supports supérieur et inférieur séparés, chacun pouvant être mis en prise séparément avec des formations de support pour maintenir l'ensemble étagère à une hauteur souhaitée contre une paroi de l'appareil d'affichage, dans lequel les éléments de gaine sont séparés du support inférieur et du support supérieur et peuvent être positionnés entre ceux-ci, les éléments de gaine étant alors supportés par le support inférieur et retenus par le support supérieur.
  5. Ensemble selon la revendication 4, dans lequel le support inférieur et le support supérieur peuvent être mis en prise séparément et successivement avec les formations de support lors de l'assemblage de la structure contre la paroi, facultativement dans lequel l'élément de gaine d'alimentation et l'élément de gaine de reprise sont dans une relation en face à face en couches et sont maintenus ensemble par des supports supérieur et inférieur.
  6. Ensemble selon l'une quelconque des revendications précédentes, dans lequel des supports supérieurs pouvant être positionnés au-dessus des éléments de gaine et/ou des supports inférieurs pouvant être positionnés en dessous des éléments de gaine comprennent des éléments d'étanchement agencés pour assurer un étanchement contre la paroi de l'appareil d'affichage, facultativement dans lequel l'élément ou chaque élément d'étanchement est agencé pour assurer un étanchement contre au moins l'un des éléments de gaine.
  7. Ensemble selon la revendication 6, dans lequel l'élément ou chaque élément d'étanchement comporte une paroi qui s'étend verticalement jusqu'à un point qui permet le maintien de l'étanchement contre la paroi de l'appareil d'affichage si un support est mis en prise avec des formations de support à un niveau différent sur la paroi.
  8. Unité d'affichage à rideau d'air d'étagère à gaine, comprenant au moins un ensemble étagère à gaine de l'une quelconque des revendications précédentes.
  9. Unité selon la revendication 8, comprenant une armoire à façade ouverte ayant un espace d'affichage délimité par une paroi verticale, cette paroi étant disposée entre l'espace d'affichage et des gaines montantes pour l'alimentation et la reprise d'air ; dans laquelle :
    l'étagère à gaine peut être positionnée sélectivement dans l'espace d'affichage à différentes hauteurs par rapport à la paroi verticale et communique avec les gaines montantes par la mise en prise de raccords de l'étagère par l'intermédiaire d'orifices dans la paroi verticale ;
    les orifices sont plus profonds verticalement que les raccords de l'étagère, de sorte que l'étagère puisse être repositionnée verticalement avec les raccords restants en communication avec les gaines montantes par l'intermédiaire des orifices après un repositionnement ; et
    un élément d'étanchement peut être repositionné avec l'étagère pour s'étendre entre l'étagère et la paroi verticale, l'élément d'étanchement chevauchant des bords des orifices pour obturer des portions des orifices non fermées par les raccords.
  10. Unité selon la revendication 9 et comprenant un élément d'étanchement supérieur s'étendant au-dessus de l'étagère jusqu'au-dessus de bords supérieurs des orifices et un élément d'étanchement inférieur s'étendant en dessous de l'étagère jusqu'en dessous de bords inférieurs des orifices.
  11. Unité selon la revendication 9 ou la revendication 10 et étant agencée de sorte qu'une mise en prise d'un support avec une paroi verticale appuie l'élément d'étanchement contre la paroi verticale.
  12. Procédé d'assemblage d'un ensemble étagère à gaine selon la revendication 1 dans un appareil d'affichage, comprenant :
    la fixation d'un premier support (68) à une paroi verticale (26) qui délimite un espace d'affichage de l'appareil ; et
    le placement d'un élément de gaine d'alimentation (22, 50) et d'un élément de gaine de reprise (24, 52) sur le premier support fixé à la paroi.
  13. Procédé selon la revendication 12, comprenant en outre la fixation d'un second support à la paroi verticale pour retenir les éléments de gaine sur le premier support.
  14. Procédé selon la revendication 12 ou la revendication 13, comprenant :
    (i) le couplage des éléments de gaine aux gaines montantes de l'appareil par l'intermédiaire d'orifices dans la paroi verticale ; et/ou
    (ii) l'empilement des éléments de gaine d'alimentation et de reprise sur le premier support avant la fixation du second support à la paroi verticale ; et/ou
    (iii) la réalisation de joints d'étanchéité entre le premier support et la paroi verticale et entre le premier support et l'élément de gaine d'alimentation.
  15. Procédé selon la revendication 13, partie (iii), comprenant en outre la réalisation de joints d'étanchéité entre le second support et l'élément de gaine de reprise, et entre le second support et la paroi verticale, facultativement dans lequel lesdits joints d'étanchéité sont réalisés par l'assemblage d'un support et d'un élément de gaine ensemble sur la paroi verticale.
EP14731326.6A 2013-05-13 2014-05-12 Améliorations dans ou relatives à des appareils d'affichage réfrigérés Active EP2996517B1 (fr)

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PL14731326T PL2996517T3 (pl) 2013-05-13 2014-05-12 Udoskonalenia w chłodzonych ekspozycyjnych urządzeniach lub ich dotyczące

Applications Claiming Priority (2)

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GBGB1308570.9A GB201308570D0 (en) 2013-05-13 2013-05-13 Height adjustment of ducted shelves
PCT/GB2014/051453 WO2014184531A1 (fr) 2013-05-13 2014-05-12 Améliorations dans ou relatives à des appareils d'affichage réfrigérés

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EP2996517A1 EP2996517A1 (fr) 2016-03-23
EP2996517B1 true EP2996517B1 (fr) 2017-07-12

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US (1) US20160081493A1 (fr)
EP (1) EP2996517B1 (fr)
CN (1) CN105377086A (fr)
AU (1) AU2014267047A1 (fr)
BR (1) BR112015028607A2 (fr)
ES (1) ES2641046T3 (fr)
GB (1) GB201308570D0 (fr)
HK (1) HK1218696A1 (fr)
PL (1) PL2996517T3 (fr)
PT (1) PT2996517T (fr)
WO (1) WO2014184531A1 (fr)

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GB201308439D0 (en) 2013-05-10 2013-06-19 Applied Design & Eng Ltd Shelves for open-fronted display units
GB201308437D0 (en) 2013-05-10 2013-06-19 Applied Design & Eng Ltd Shelves for open-fronted display units
GB2549950A (en) * 2016-05-03 2017-11-08 The Marmon Group Ltd Merchandise display system and unit
WO2017196266A1 (fr) * 2016-05-13 2017-11-16 Sosongsermkul Aphinan Mécanisme permettant l'ouverture et la fermeture automatiques de portes qui sont indépendantes les unes des autres pour une vitrine
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CN114027675B (zh) * 2021-11-15 2023-07-21 珠海格力电器股份有限公司 陈列柜

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HK1218696A1 (zh) 2017-03-10
GB201308570D0 (en) 2013-06-19
ES2641046T3 (es) 2017-11-07
PL2996517T3 (pl) 2017-11-30
WO2014184531A1 (fr) 2014-11-20
CN105377086A (zh) 2016-03-02
US20160081493A1 (en) 2016-03-24
EP2996517A1 (fr) 2016-03-23
BR112015028607A2 (pt) 2017-07-25
PT2996517T (pt) 2017-09-26
AU2014267047A1 (en) 2015-12-03

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