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WO2000053062A1 - Vitrine a panneau de verre chauffe - Google Patents

Vitrine a panneau de verre chauffe Download PDF

Info

Publication number
WO2000053062A1
WO2000053062A1 PCT/US2000/003601 US0003601W WO0053062A1 WO 2000053062 A1 WO2000053062 A1 WO 2000053062A1 US 0003601 W US0003601 W US 0003601W WO 0053062 A1 WO0053062 A1 WO 0053062A1
Authority
WO
WIPO (PCT)
Prior art keywords
window panel
glass pane
glass
electrically conductive
heated
Prior art date
Application number
PCT/US2000/003601
Other languages
English (en)
Inventor
Andrew G. Menke
Paul J. Artwohl
Original Assignee
Ardco, Inc.
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 Ardco, Inc. filed Critical Ardco, Inc.
Publication of WO2000053062A1 publication Critical patent/WO2000053062A1/fr

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
    • A47F3/0404—Cases or cabinets of the closed type
    • A47F3/0426—Details
    • A47F3/0434—Glass or transparent panels
    • 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
    • A47F3/005—Show cases or show cabinets with glass panels
    • A47F3/007—Cases or cabinets of the counter type
    • A47F2003/008—Cases or cabinets of the counter type with pivoting front glass panel

Definitions

  • the present invention relates generally to perishable merchandise display cabinets having thermally insulated, glass panel fronts, and more particularly, to display cabinets of this type that are used in supermarkets, butcher shops, bakeries and the like for displaying cooled or heated food products.
  • Display cabinets having glass panel fronts for displaying perishable merchandise, in particular food products ranging from red meats, fish and seafood, deli items, hot foods, baked goods, and ice cream.
  • Display cabinets having thermally insulated, bent and tempered glass panels in particular provide customers with enhanced visibility to the product zone wherein the products are maintained at the desired temperature.
  • Such display cabinets have an elongated hollow configuration defining the product zone within which the food products are contained and a plurality of glass panel fronts each extending forwardly and downwardly in curved fashion from a top of the cabinet for enclosing the front of the cabinet while permitting viewing of refrigerated food products and the like within the cabinet by passing customers.
  • each window panel may be hinged and provided with fluid controlled cylinders or springs to facilitate pivotal movement of the window panel between a lowered, closed position and an upwardly raised, open position that permits access to the interior of the cabinet from the customer side in order to facilitate refilling of the cabinet with merchandise and cleaning of the cabinet interior.
  • the window panels in such display cabinets typically comprise a thermally insulated glass unit made up of two or more glass panes that are supported in spaced apart relation with the interior space between the panes appropriately sealed. Thermal efficiency considerations further require that the window panels effectively seal the interior of the refrigerator cabinet from the outside environment when the panels are in their closed positions. Accordingly, sealing means is provided between adjacent pairs of glass panels for sealing the gap between the adjacent panels when in the lowered, closed position.
  • TJ.S. Patent 5, 116,274 discloses a display cabinet having a glass front formed by one or more pivotable, bent and tempered glass panels.
  • U.S Patent 5,622,414 discloses a display cabinet having a glass front formed by one or more bent and tempered glass panels mounted in side by side relationship for pivotable movement about an upper horizontal pivot axis. The space between the sides of adjacent glass panels is sealed by sealing members which extend outwardly from their respective panel to overlap in sealing relationship.
  • Such display cabinets are provided with appropriate auxiliary equipment, in a manner well known in the art, to cool or heat the product zone to a temperature dependent upon the particular application.
  • the product zone In frozen food applications, the product zone is typically maintained at a temperature in the range of about -5 F to about 10 F, as required for the particular frozen product being displayed.
  • the product zone For refrigerated foods, such as red meats, fish and seafood, deli items and the like, the product zone is typically maintained at a temperature in the range of about 30 F to about 45 F, again as required for the particular refrigerated food being displayed.
  • hot food applications for example baked goods and hot deli items, the product zone is typically maintained in a heated state within a temperature range required for the particular product being displayed.
  • Another object of the present invention is to provide a display cabinet of such type wherein each glass panel is a thermally insulated, bent and tempered glass panel having a heated surface for preventing frost formation and condensation.
  • each of the window panels has a region which may be selectively heated to prevent condensation, fog and frost formation on the outside surface of the glass panel.
  • the heated region is formed of an electrically conductive coating deposited on a surface of the glass panel to extend between a pair of spaced apart electrically conductive strips, one of which serves as an anode, the other as a cathode.
  • electrical current is applied to the conductive strips, a voltage potential is established between the strips whereby electric current passes through the conductive coating to heat the glass panel.
  • the display case may have one or more heated, thermally insulated, bent and tempered glass window panels disposed in side-by-side relation. The panels may be stationary or mounted for pivotal movement about an upper horizontal pivot axis for opening to provide access to the interior of the display case.
  • FIG. 1 is a top plane view of a refrigerator display cabinet embodying the present invention
  • FIG. 2 is a fragmentary section of the refrigerator display cabinet in FIG. 1 taken in the plane of line 2-2, showing a window panel of the display cabinet in a closed position;
  • FIG. 3 is top view of a window panel
  • FIG. 4 is sectional side elevation view of a two-pane window panel
  • FIG. 5 is sectional side elevation view of a three-pane window panel
  • FIG. 6A and 6B are a top view and sectional side elevation view, respectively, of a first embodiment of a heated window pane in accordance with the present invention
  • FIG. 7A and 7B are a top view and sectional side elevation view, respectively, of a second embodiment of a heated window pane in accordance with the present invention.
  • FIG. 8A and 8B are a top view and sectional side elevation view, respectively, of a third embodiment of a heated window pane in accordance with the present invention.
  • FIG. 9A and 9B are a top view and sectional side elevation view, respectively, of a fourth embodiment of a heated window pane in accordance with the present invention. Description of the Preferred Embodiments
  • an illustrative perishable merchandise display case 10 of a conventional configuration comprising an upper cabinet section 12 and a lower cabinet section 14.
  • the upper cabinet section 12 defines within its interior a product zone 13 wherein the perishable merchandise is displayed and maintained within a desired temperature range as required for the particular merchandise housed therein. If desired, one or more shelves 18 may be provided within the product zone 13 above the floor 11 thereof to provide additional display area.
  • the lower cabinet section 14 houses conventional auxiliary equipment, not shown, for cooling or heating the product zone 13 defined within the upper cabinet section 12.
  • the upper cabinet section 12 has, in this instance, a forwardly and upwardly inclined rear wall 15 on the back side, also commonly referred to as the service side, of the display case 10 and a horizontal top wall 16 extending forwardly therefrom.
  • the upper cabinet section 12 of the display case 10 has a plurality of window glass panels 20 mounted in side-by-side relation along the length of the cabinet.
  • each glass panel 20 is supported by respective pairs of hinge and clamp assemblies 21, and associated support bracket 44 and lifting means 45, shown for illustration purposes as a pneumatic cylinder, that permit pivotal movement of the window panel 20 about a horizontal axis between a lowered, closed position and a raised, open position.
  • the window panels each have side sealing members 55 secured in a respective side spacer element of the window panel 20 with a sealing portion thereof extending outwardly therefrom for overlapping sealing contact with the side sealing member of an adjacent window panel when the window panels 20 are in a closed position.
  • a particularly advantageous structure for the side sealing members 55 is disclosed in commonly assigned U.S. Patent No.
  • each glass panel 20 in this case comprises a thermally insulated glass unit formed of a pair of outwardly and downwardly curved and tempered glass panes 24, 25 disposed in parallel surface-to- surface relation separated by a spacer.
  • the spacer comprises a pair of curved side spacer elements 26 disposed adjacent opposite sides of an arcuate outer glass pane 24 and an arcuate inner glass pane 25, a lower horizontal spacer element 28, and an upper horizontal spacer element 29.
  • the two pane embodiment of the glass panel 20 is best suited for applications wherein the temperature to be maintained within the product zone 13 is maintained in the range from about 25 F upward.
  • each thermally insulated glass panel 20 would more advantageously comprise a three pane structure.
  • a three pane thermally insulated glass panel may, for example, comprise a set of three outwardly and downwardly curved and tempered glass panes, an arcuate outer pane 24, an arcuate inner pane 25 and an arcuate intermediate pane 23, disposed in parallel, spaced, surface-to-surface relation, each adjacent pair of glass panes being separated by a spacer.
  • Each spacer again comprising a pair of curved side spacer elements 26 disposed adjacent opposite sides of neighboring glass panes 23, 24, 25, a lower horizontal spacer element 28, and an upper horizontal spacer element 29.
  • the thermally insulated glass panels depicted in Figures 3, 4 and 5, wherein the window glass panels each have a clean modernistic appearance, with the exterior surfaces thereof being unencumbered and free of unsightly moldings, clamps or external trim, is disclosed in the aforementioned U.S. Patent No. 5,622,414.
  • the upper horizontal spacer element 29 of each glass panel 20 is in the form of a pivot bar disposed between the glass panes 24, 25 and is for securable by screws to the hinge plate 30 of the clamp and hinge assembly 21 for enabling pivotal movement of the window panel 20.
  • the spacer elements are disposed at the upper peripheral edge of the window panel 20 between the window panes and thus are not externally exposed as in many conventional glass panel display cases.
  • a thermally insulated glass panel display case having externally exposed clamps is disclosed in commonly assigned U.S. Patent No. 5,116,274, the entire disclosure of which is hereby incorporated by reference.
  • the particular construction of the hinge and clamp assembly associated with the glass panel is not germane and the present invention may be applied to glass panels having externally exposed or hidden clamps.
  • exemplary hinge and clamp assemblies for use with thermally insulated glass panels reference may be made to the aforementioned U.S. Patents.
  • a sealant such as butyl
  • a secondary seal formed by a sealant for example polysulfide, urethrane, silicone, permapol or other conventional sealing compounds, preferably encompasses a rear side of the pivot bar 29 along the length thereof between the hinge mounting sections 30.
  • the pivot bar 29 may be formed with a recess adjacent the peripheral edge of the inner glass pane 25 in which sealant, for example polysulfide, urethrane, silicone, permapol or other conventional sealing compounds, is also provided. Sealant is similarly provided in a pocket defined by the underside of the outer glass pane and bevels in the upper ends of the pivot bar hinge mounting sections 30.
  • sealant for example polysulfide, urethrane, silicone, permapol or other conventional sealing compounds
  • Sealant is similarly provided in a pocket defined by the underside of the outer glass pane and bevels in the upper ends of the pivot bar hinge mounting sections 30.
  • a butyl sealant preferably is provided therebetween.
  • a secondary seal may be formed by polysulfide, or other sealant, enclosing the areas defined between the spacer neck portion and the adjacent surfaces of the bounding glass panes.
  • desiccant strips 76 may be provided across the upper portion of each window panel 20 inwardly from the pivot bar 29, preferably in the upper curved portion thereof.
  • the desiccant strips 76 preferably are made of a conventional material, commercially available under the name "Super Spacer" by Edge Tech division of Lauren Manufacturing Co.
  • the desiccant strips 76 preferably are of rectangular cross section and extend across the entire upper length of the window panel so as to both absorb moisture within the interior of the window panel 20, as well as assist in maintaining the glass panes 24, 25 in properly spaced relation to each other.
  • an interior portion of the spacers may be filled with desiccant.
  • a silk screen masking 50 such as an opaque ceramic ink, may be provided on the underside of the upper marginal edge region of the outer glass pane 24 for preventing viewing of the pivot bar 29 and the hinge plate 40 and hinge pin 42 of the hinge and clamp assembly 21 and for providing the door with a clean, modernistic appearance free of exterior clamps, hardware or moldings.
  • a narrow width border of silk screen 74 again preferably of an opaque ceramic ink, may be provided on the underside of the outer glass pane along its outer peripheral side.
  • a similar narrow width, opaque silk screen may be provided on the underside of the glass pane along the lower peripheral edge of the window panel, which may have a conventional tubular spacer, and when in a closed position, is positionable into sealing contact with an appropriate gasket on the cabinet. Additionally, silk screen masking 50 may be provided on the underside of the outer glass to conceal the existence of any desiccant strips 76 from outside viewing
  • each of the curved glass panels has a surface that is heated to prevent moisture condensation and/or frost from forming on the glass and obstructing the view of the merchandise within the display case.
  • a pair of busbars 60 are mounted on a surface of one of the glass panes and disposed in spaced relationship at opposite extremities of a region of the glass surface to be heated.
  • An electrically conductive coating 80 is disposed on the surface of the glass pane so as to extend over the region to be heated so as to electrically interconnect the spaced busbars.
  • Each of the busbars 60 comprises a strip of electrically conductive material, such as copper or silver, electrically connected to an power source (not shown) through a lead wire (not shown) soldered or connected by contacts to the busbar and typically passed through a corner of the window panel assembly where the spacers meet.
  • the particular glass surface of the glass panel 20 to be heated depends on the application.
  • the inside surface of the outer pane of glass is the desired surface to be heated.
  • the inside surface 24A of the outer glass pane 24 is heated by coating the desired region thereof to be heated with an electrically conductive coating 80 extending between a pair of spaced apart busbars disposed at opposite edges of the electrically conductive coating.
  • the present invention is not limited in application to the inside surface of the outer pane of a glass panel. If desired, in a two pane glass panel, the busbars and electrically conductive coating could alternatively be applied to the inside surface 25 A of the inner panel 25.
  • busbars and electrically conductive coating could alternatively be applied to the inside surface 23A or the outside surface 23B of the intermediate panel 23.
  • the busbars 60 may be placed along opposite sides of the glass pane as depicted in Figures 6A and 6B or along the top and bottom of the glass pane as depicted in Figures 7 A and 7B. Additionally, more than two busbars 60 could be mounted to the surface of glass pane to heat separate limited areas of the glass pane.
  • a first set of busbars 60 A may be interconnected by an electrically conductive coating 80A disposed to heat a first area on the surface of the glass pane and a second set of busbars 60B may be interconnected by an electrically coating 80B to heat a second area on the surface of the same glass pane.
  • three busbars 60C, 60D and 60E could be disposed in spaced relationship with busbars 60C and 60D interconnected by an electrically conductive coating 80A and busbars 60D and 60E interconnected by an electrically conductive coating 80B, whereby the two respective coated areas are heated at differing levels.
  • the electrically conductive coating 80 must be light transmissive, that is, when applied to the glass, the coating can not substantially reduce visibility through the glass pane.
  • the electrically conductive coating may comprise tin oxide, indium-tin oxide, zinc oxide, cadmium stannate or other electrically conductive material that is substantially light transmissive.
  • the electrically conductive coating is applied as a uniform, relatively thin coating having a thickness in the range of 500 to 9000 Angstroms.
  • voltage is applied across the electrically conductive coating 80 by supplying electric current through the paired busbars 60 electrically interconnected by conductive coating 80, one of which serves as an anode and the other as a cathode, thereby heating the glass pane surface covered by the coating 80.
  • the electric loading applied to the conductive coating 80 ranges from about 5 to about 18 watts per square foot of coated surface area of the glass pane. At loadings significantly below 5 watts per square foot surface area, it is generally more economical to add an additional pane to a panel.
  • the electrically conductive coating may advantageously be applied to the desired surface of the glass pane prior to the bending and tempering operation.
  • masking is applied to a surface of the glass pane except in those areas where the busbars 60 are to be located.
  • the busbars 60 are then deposited on the unmasked areas using conventional application techniques.
  • electrical barrier strips are then applied along the perimeter edges of the glass pane about the circumference thereof, including the edges located outside of the busbars along the sides on which the busbars extend.
  • the electrically conductive coating 80 is applied by conventional techniques, such as for example spray coating, to extend between and electrically interconnect the paired busbars 60.
  • the barrier strips are removed and silk screen masking is applied as desired to hide the busbars from view.
  • the coated glass pane is now ready for passing to the glass furnace to be bent to the desired contoured and tempered.
  • the contour of the bent glass pane has a plurality if arcs of different radius of curvature, as opposed to being formed of a single arc of a particular radius of curvature.
  • the arcs forming the contour have a radii of curvature ranging from four (4) to ten (100) inches.
  • the bent, tempered glass window panel of the present invention is particularly suited for use in merchandise display cases housing merchandise in environmental conditions promote condensation, fogging or frost formation.
  • a desired surface of one or more of the bent and tempered panes of the window panel may be selectively heated by providing elect ⁇ c current to the busbars to establish an electric potential across the pane surface area that is coated with the elect ⁇ cally conductive coating.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

Une vitrine (10) pour marchandise périssable comprend une pluralité de panneaux (20) de fenêtre thermoisolés en verre, bombé et trempé, disposés côte à côte. Les panneaux peuvent être fixes ou montés pour avoir un mouvement pivotant autour d'un axe de pivot horizontal supérieur. Chacun des panneaux (20) de fenêtre présente une région pouvant être chauffée sélectivement afin d'empêcher une condensation d'humidité et une formation de givre sur le panneau vitré. La région chauffée est constituée d'un revêtement électroconducteur (80) déposé sur une surface du panneau vitré de manière à s'étendre entre une paire de bandes (60) espacées électroconductrices, dont chacune sert d'anode, l'autre constituant la cathode. Lorsque l'on applique un courant électrique aux bandes conductrices, un potentiel de tension est établi entre les bandes de manière que le courant électrique passe à travers le revêtement conducteur pour chauffer le panneau vitré.
PCT/US2000/003601 1999-03-10 2000-02-14 Vitrine a panneau de verre chauffe WO2000053062A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26609699A 1999-03-10 1999-03-10
US09/266,096 1999-03-10

Publications (1)

Publication Number Publication Date
WO2000053062A1 true WO2000053062A1 (fr) 2000-09-14

Family

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Family Applications (1)

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PCT/US2000/003601 WO2000053062A1 (fr) 1999-03-10 2000-02-14 Vitrine a panneau de verre chauffe

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002028234A1 (fr) * 2000-10-02 2002-04-11 Tyler Refrigeration Corporation Meuble d'immersion
EP1203551A1 (fr) * 2000-11-06 2002-05-08 Industrie Scaffalature Arredamenti- ISA SpA Présentoir réfrigéré et procédé pour empêcher la formation de buée sur ses parties transparentes
EP1462743A1 (fr) * 2003-03-28 2004-09-29 Samsung Electronics Co., Ltd. Réfrigérateur encastré
EP2278851A1 (fr) 2009-07-24 2011-01-26 THERM-IC Products GmbH Nfg. & Co. KG Plaque de verre pouvant être chauffée électriquement, son procédé de fabrication et fenêtre
DE102019210574A1 (de) * 2019-07-17 2021-01-21 Schott Ag Tür für ein Gefrier- oder Kühlmöbel
CN113229682A (zh) * 2021-06-28 2021-08-10 青岛海力商用电器有限公司 一种冷冻展示柜用除霜结构
US11116333B2 (en) 2019-05-07 2021-09-14 Carrier Corporation Refrigerated display cabinet including microchannel heat exchangers
US11559147B2 (en) 2019-05-07 2023-01-24 Carrier Corporation Refrigerated display cabinet utilizing a radial cross flow fan

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911245A (en) * 1974-04-15 1975-10-07 Cardinal Insulated Glass Co Heated multiple-pane glass units
US5116274A (en) 1990-10-02 1992-05-26 Ardco, Inc. Refrigerator display cabinet with thermally insulated pivotable window pane
US5449885A (en) * 1991-03-05 1995-09-12 Saint-Gobain Vitrage International Method for preparing a heater glazing for a refrigerated display case
US5622414A (en) 1993-06-07 1997-04-22 Ardco, Inc. Refrigerator display cabinet with thermally insulated pivotable all glass front window panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911245A (en) * 1974-04-15 1975-10-07 Cardinal Insulated Glass Co Heated multiple-pane glass units
US5116274A (en) 1990-10-02 1992-05-26 Ardco, Inc. Refrigerator display cabinet with thermally insulated pivotable window pane
US5449885A (en) * 1991-03-05 1995-09-12 Saint-Gobain Vitrage International Method for preparing a heater glazing for a refrigerated display case
US5622414A (en) 1993-06-07 1997-04-22 Ardco, Inc. Refrigerator display cabinet with thermally insulated pivotable all glass front window panel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002028234A1 (fr) * 2000-10-02 2002-04-11 Tyler Refrigeration Corporation Meuble d'immersion
EP1203551A1 (fr) * 2000-11-06 2002-05-08 Industrie Scaffalature Arredamenti- ISA SpA Présentoir réfrigéré et procédé pour empêcher la formation de buée sur ses parties transparentes
EP1462743A1 (fr) * 2003-03-28 2004-09-29 Samsung Electronics Co., Ltd. Réfrigérateur encastré
EP2278851A1 (fr) 2009-07-24 2011-01-26 THERM-IC Products GmbH Nfg. & Co. KG Plaque de verre pouvant être chauffée électriquement, son procédé de fabrication et fenêtre
US11116333B2 (en) 2019-05-07 2021-09-14 Carrier Corporation Refrigerated display cabinet including microchannel heat exchangers
US11559147B2 (en) 2019-05-07 2023-01-24 Carrier Corporation Refrigerated display cabinet utilizing a radial cross flow fan
DE102019210574A1 (de) * 2019-07-17 2021-01-21 Schott Ag Tür für ein Gefrier- oder Kühlmöbel
US12078407B2 (en) 2019-07-17 2024-09-03 Schott Ag Door for a freezer or refrigerator cabinet
CN113229682A (zh) * 2021-06-28 2021-08-10 青岛海力商用电器有限公司 一种冷冻展示柜用除霜结构

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