US3850003A - Air defrost air curtain display case - Google Patents

Air defrost air curtain display case Download PDF

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Publication number
US3850003A
US3850003A US00458104A US45810474A US3850003A US 3850003 A US3850003 A US 3850003A US 00458104 A US00458104 A US 00458104A US 45810474 A US45810474 A US 45810474A US 3850003 A US3850003 A US 3850003A
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United States
Prior art keywords
air
passage
cabinet
refrigerated display
defrost
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Expired - Lifetime
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US00458104A
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English (en)
Inventor
S Beckwith
W Johnston
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Kysor Industrial Corp
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Kysor Industrial Corp
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Priority to US00458104A priority Critical patent/US3850003A/en
Application granted granted Critical
Publication of US3850003A publication Critical patent/US3850003A/en
Priority to JP49141649A priority patent/JPS523128B2/ja
Assigned to KYSOR INDUSTRIAL CORPORATION, A CORP. OF reassignment KYSOR INDUSTRIAL CORPORATION, A CORP. OF ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KYSOR INDUSTRIAL CORPORATION, A CORP. OF DE.
Anticipated expiration legal-status Critical
Assigned to JPMORGAN CHASE BANK, N.A. AS AGENT reassignment JPMORGAN CHASE BANK, N.A. AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KYSOR INDUSTRIAL CORPORATION
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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
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
    • F25D21/125—Removing frost by hot-fluid circulating system separate from the refrigerant system the hot fluid being ambient air

Definitions

  • ABSTRACT A multiple recirculating curtain refrigerated display case specially constructed to achieve low power air defrost. The defrosting function occurs by ambient air being drawn into the innermost passage through both ends, i.e., the air curtain outlet nozzle and the air curtain inlet, then across the refrigeration evaporator unit from both ends, to exhaust conduits near the coil midpoint and blowers forcing the air out through controlled trap doors to the ambient atmosphere.
  • This invention relates to air curtain type refrigerated display cabinets, and more particularly to a novel air defrost refrigerated display cabinet.
  • the cabinets generally employ two or three air curtains, with the innermost one and the adjacent one normally being recirculated around the cabinet through passages.
  • the innermost-curtain is normally the coldest, ,the second one being somewhat warmer, and the third outer one being basically an ambient temperature curtain to reinforce the jet inertia and warm the aisle.
  • Refrigeration means normally in the form of one or more evaporator coil units, is located in the innermost passage for cooling the air flowing past. Periodically during operation, this innermost passage and its refrigeration means must be defrosted to remove accumulated ice, frost, and condensation collected from the cooled air and tending to 'impede the operation of the equipment. Such defrosting is usually achieved with electrical heaters adjacent the coils of the refrigeration means, or in some instances, by passing hot gas through the coils of the refrigeration means. Hot gas defrost is complex, and is practical in only a small percentage of the installations, however. With electrical defrost, the refrigeration operation is temporarily halted, allowing the recirculating air curtain to be warmed by the high voltage electrical heaters.
  • An important object of this invention is to provide a multiple curtain, open front refrigerated display case or cabinet capable of rapid defrosting of the refrigeration means, the inner passage, and the air curtain inlet and outlet nozzles, using ambient air, without the complexities of the hot gas system, and without periodically demanding large amounts of electrical power as at present.
  • the novel combination case is specially constructed to draw ambient air through it in a unique fashion from opposite ends for defrosting, and of achieving defrost in a time period as short as or shorter than that required for high energy electrical defrost.
  • This rapid defrost is achieved by a special arrangement of components relative to the evaporator coils and air flow passages. Power consumption required for defrost has been proven to be only a fraction of that previously required, such that total power consumption of the display is lowered considerably.
  • the novel display cabinet during defrost, has warm ambient air drawn into both the inlet and the outlet nozzle of the innermost air curtain, the air being passed through the refrigeration evaporator unit from opposite directions, and out special exhaust conduits intermediate the ends of the refrigeration unit, drawn by blowers that force the defrosting air out controlled trap doors to the ambient atmosphere. Defrosting by pulling warm air into the outlet face of the evaporator coil as well as into the inlet face reduces the length of the warm air path and thus speeds defrost.
  • FIG. 1 is a side elevational, sectional view of the novel display cabinet
  • FIG. 2 is a fragmentary perspective view of the top of the cabinet in FIG. 1;
  • FIG. 3 is a perspective view of the rear of the novel cabinet, with certain housing components removed;
  • FIG. 4 is an enlarged, fragmentary, perspective view of the inside of the cabinet with certain panels removed;
  • FIG. 5 is a perspective view of the evaporator coil unit, showing the position of defrost air outlets therefrom;
  • FIG. 6 is a fragmentary enlarged sectional view of the upper right portion of the cabinet in FIG. 1.
  • the novel refrigerated display cabinet assembly 10 includes a food storage and display space 12 defined by an upper panel or ceiling 14, a rear wall 16, and a bottom 18, the front having an enlarged access opening 20 communicating between storage space 12 and the ambient atmosphere 22 normally in a grocery store or supermarket.
  • End panels 24 (FIG. 3) enclose the opposite ends of the storage area.
  • Rear wall 16 preferably is slightly downwardly forwardly sloping, having a plurality of shelves 26 mounted generally normal thereto, i.e., having a slightly forwardly upward slope for optimum display of products.
  • Extending around and adjacent the bottom, back, and top of the display area is an inner refrigerated air flow passage 28.
  • elongated air flow inlet 30 extending along the lower edge of access opening 20, covered by a perforate grid 32. It also has an elongated air flow outlet nozzle 34 extending along the upper edge of the access opening, opposite inlet 30.
  • Outlet nozzle 34 contains air directing means such as honeycomb.
  • elongated evaporator type refrigeration coil unit 40 containing the usual sets of coils 42 and fins 44 as depicted in FIG. 5.
  • Passage 28 is basically defined between the noted panels 14, 16 and 18 and a spaced partition 50 extending around the bottom, back, and top of the case. Panel 50 not only forms outer wall of inner passage 28, but also forms inner wall of a second adjacent passage 52 which likewise extends around the bottom, back and top of the case adjacent passage 28. Passage 52 has an elongated outlet nozzle 54 along the upper edge of the access opening, outwardly of inner nozzle 34. It includes air directing means such as honeycomb.
  • This outlet nozzle 54 is at a small acute angle to nozzle 34 and cooperates with an elongated inlet 56 on the lower edge of the opening.
  • Inlet member 56 is generally adjacent inlet 30, outwardly of the storage area, and has a perforate protective grid 58 thereover.
  • Passage 52 includes a series of motor operated fans 60 for propelling the air through the passage, out outlet 54, across the face of the storage space adjacent the inner refrigerated air curtain, and through inlet 56 for recirculation.
  • the guard curtain of air recirculated in this fashion is at a temperature higher than the temperature of the inner refrigerated air curtain but, normally below ambient temperature.
  • a third curtain of air at ambient temperature is preferably also employed.
  • This third curtain does not recirculate around the case as the first and second curtains do. It includes a series of inlets 64 at the top of the case, in which are mountedmotor operated fans 66 communicating with a passage 68 and an elongated outlet nozzle 70 outwardly of and adjacent nozzle 54 and preferably at a small acute angle thereto.
  • This ambient air curtain is passed over opening outwardly of the two air curtains from outlet nozzles 34 and 54 and flows into aisle area 72 in front of the lower front wall 74 of the case, to cause an aisle warming effect as well as participating in this multiple air curtain action.
  • protruding through panel 50 and the outer panel 80 is a series of spaced defrost air exhaust conduits 82 that communicate between passage 28 adjacent refrigeration evaporative coils 40 and a plenum chamber 86 at the rear of the case.
  • Plenum 86 is defined between outer wall 80 and an L-shaped housing 90 extending upwardly at the back of the structure and over a portion of the top of the cabinet.
  • Conduits 82 are arranged in a series along the back of the case or cabinet, each being small enough to allow proper air flow therearound of the curtain flowing through passage 52 therearound.
  • the inner open ends of these conduits 82 are intermediate the upper and lower ends 40 and 40" respectively of the evaporator coils.
  • Upper end 40' of the evaporative unit is basically oriented towards nozzle outlet 34, while lower end 40" is basically oriented towards inlet 30, i.e., oriented towards the air flow relative to the nozzle and inlet.
  • Conduits 82 are preferably located closer to the upper end 40' of the coils than the lower end 40", with the optimum position having been found by experimentation to be about two thirds towards the upper end.
  • housing 90 At the top of housing 90, along the length of the cabinet, is a series of air propelling and suction blowers 94 of conventional squirrel cage type, each having an axial inlet 94a and a tangential outlet 94b.
  • a series of trap doors 96 Mounted on top of the housing is a series of trap doors 96, the forward edge of which is pivotally mounted at 98. Each trap door is located above one of the blowers. These trap doors are biased shut under normal conditions by their own weight, i.e., gravity, and are opened by air pressure from blowers 94 when operated.
  • the trap doors are mounted to have the exhaust therefrom ejected upwardly and rearwardly, i.e., away from the ambient air inlet 64.
  • the two recirculatory curtains of air are continuously propelled, the inner one by fans 36 through the evaporative cooling unit 40, out nozzle 34, across the front of the display area, and back into inlet 30, and the adjacent recirculatory guard curtain by fans 60, through the passage 52, out nozzle 54, across the open front, and into inlet 56.
  • the ambient air curtain is drawn by blowers 66 through inlets 64, through passage 68 and out nozzle 70 across the front of the display area. (See solid arrows)
  • no flow occurs through conduits 82 and plenum 86, the trap doors 96 being closed and the blowers 94 being inactive.
  • the frost build-up on the evaporator coil portions, and in passageway 28 as well as the outlet nozzle 34 and the inlet 30 requires momentary defrosting to enable the unit to operate at reasonable efficiency.
  • the defrosting operation may be manually activated, or more commonly, will be activated on a time or temperature controlled basis. This defrosting must be done rapidly, without thawing the frozen food products or the like in the display area, or creating a heavy frost layer on the food products.
  • fans 36, and 66 continue to operate, while blowers 94 are activated.
  • the positive pressure of blowers 94 forces trap doors 96 open for discharge of defrosting air.
  • This air is drawn by these blowers into passage 28 from opposite directions simultaneously, i.e., into outlet nozzle 34 at the top front of the case and simultaneously into inlet 30 at the bottom front of the case, causing the air to flow in both directions through the inner passage 28 toward the evaporator coil unit. (See broken arrows)
  • This is warm ambient air out of the room which quickly thaws the frost out of both the outlet nozzle and the inlet and out of both ends of the passage.
  • This ambient air then enters both ends of the evaporator coil unit, i.e., upper end 40 and lower end 40" towards the central portions thereof, where it flows to and through outlet conduits 82.
  • This air from both ends causes the evaporator coil, where most of the frost is concentrated, to defrost rapidly.
  • the defrost air flows into plenum 86 and to blowers 94 which ejects them from the display case upwardly and rearwardly so as not to disturb customers in the store or the food products in the display area.
  • conduits 82 operate most efficiently when positioned closer to the upper end 40 than the lower end 40" in the particular display case depicted. In fact, a position about two thirds of the way toward the upper end is optimum.
  • the defrost time can be lowered significantly, e.g., from approximately 1.5 hours per day to 0.8 hours per day when the case is converted from the conventional electric defrost to this novel air defrost system.
  • the warm air does not need to slowly defrost its way from one end of the passage to the other and from one end of the evaporator coil to the other.
  • approximately 0.73 kilowatt hours per day per foot of display case are saved using this system. l.e., approximately 266.5 kilowatt hours per year per foot of display case.
  • an air curtain refrigerated display cabinet said cabinet having an access opening in one side communicating a storage and display space within the cabinet with the ambient atmosphere, at least two outlet nozzles, an inner one and an adjacent one, extending across the upper edge of the access opening, and corresponding inner and adjacent inlet members extending across the lower edge of said opening; an inner passage and an adjacent passage connecting said inlet members with respective ones of said outlet nozzles; circulating means in each of said passages for circulating panels of air through said passages and across the access opening from said outlet nozzles to said inlet members; refrigeration evaporator coil means in said inner passage for cooling circulated air flowing therepast; the improvement comprising: air defrost means comprising a housing forming at least one plenum chamber; defrost air conduit means from said inner passage, adjacent said evaporator coil means, to said plenum chamber; air discharge outlet means from said plenum chamber to the ambient atmosphere; and air propulsion means operably associated with said plenum chamber, said conduit means, and said discharge outlet means
  • the refrigerated display cabinet in claim 1 including trap doors over said air discharge outlet means, said trap doors being normally closed, and shiftable to open condition by air pressure from said propulsion means.
  • said evaporator coil means has a first end generally oriented toward said inner outlet nozzle and a second end generally oriented toward said inner inlet member; and said defrost air conduits are located intermediate said first and second ends.
  • the refrigerated display cabinet in claim 6 includ ing a third outlet nozzle extending across said access opening adjacent to and outwardly of said two outlet nozzles, ambient air inlets at the top of said cabinet, and passage means with air movement means therein, between said ambient air inlets and said third outlet nozzle: and said trap doors being arranged to open in a direction causing discharge of defrost air away from said ambient air inlets.
  • a refrigerated display cabinet having an access opening in one side communicating a storage and display space within the cabinet with the ambient atmosphere, at least two outlet nozzles, an inner one and an adjacent one, extending across one edge of the access opening, and corresponding inner and adjacent inlet members extending across the opposite edge of the opening; an inner passage and an adjacent passage connecting said inlet members with respective ones of said outlet nozzles; circulating means for circulating panels of air through said passages and across the access opening from the outlet nozzles to the inlet members; refrigeration means in the innermost one of said passage means, having one end oriented generally toward said inner inlet member and a second end oriented generally toward said inner outlet nozzle; the improvement comprising: air defrost means for said refrigeration means and said inner passage means, nozzle, and inlet member, comprising exhaust conduit means communieating with said innermost passage means between the ends of said refrigeration means, and suction means communicating with said exhaust conduit means and exhausted to the ambient atmosphere, whereby, with actuation of said suction means, ambient air flows into the
  • the refrigerated display cabinet in claim 8 including a plenum chamber communicating with said exhaust conduit means and suction means, and trap door means from said plenum chamber, operably associated with said suction means to open only during actuation of said suction means.
  • suction means constitues blowers in communication with said exhaust conduit means, and to the ambient atmosphere through trap door means; said trap door means being openable during operation of said blowers.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Defrosting Systems (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
US00458104A 1974-04-05 1974-04-05 Air defrost air curtain display case Expired - Lifetime US3850003A (en)

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Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937033A (en) * 1975-02-07 1976-02-10 Kysor Industrial Corporation Air defrost display case
FR2306411A1 (fr) * 1975-04-03 1976-10-29 Anorga Joseph Evaporateur perfectionne de chambre froide
US4026121A (en) * 1975-05-20 1977-05-31 Fuji Denki Seizo Kabushiki Kaisha Defrosting in open show case of cold-air-circulation type
US4072488A (en) * 1976-12-10 1978-02-07 Kysor Industrial Corporation Air defrost reach-in refrigerated display cabinet
FR2383634A1 (fr) * 1977-03-16 1978-10-13 Kysor Industrial Corp Meuble d'etalage refrigere a degivrage par air
FR2389083A1 (fr) * 1977-04-25 1978-11-24 Tyler Refrigeration Corp Meuble refrigere d'etalage
US4207747A (en) * 1977-04-25 1980-06-17 Tyler Refrigeration Corporation Air defrost system using secondary air band components
US4242882A (en) * 1979-07-19 1981-01-06 Tyler Refrigeration Corporation Glass door merchandiser
US4245482A (en) * 1979-03-30 1981-01-20 Tyler Refrigeration Corporation Glass door merchandiser
US4265090A (en) * 1979-03-30 1981-05-05 Tyler Refrigeration Corporation Glass door merchandiser with ambient air defrost
US4265092A (en) * 1979-12-26 1981-05-05 Tyler Refrigeration Corporation Refrigerated display case using air defrost with supplemental heater
US4267706A (en) * 1979-05-31 1981-05-19 Tyler Refrigeration Corporation Shop around refrigerated merchandiser
FR2473866A2 (fr) * 1979-08-29 1981-07-24 Tyler Refrigeration Corp Meuble d'etalage refrigere, ouvert a l'avant, presentant plusieurs conduits d'air avec degivrage par l'air ambiant, et son procede de mise en oeuvre
US4283922A (en) * 1978-07-26 1981-08-18 Tyler Refrigeration Corporation Air defrost system using secondary air band components
US4299092A (en) * 1979-12-07 1981-11-10 Tyler Refrigeration Corporation Energy conserving refrigerated merchandiser display case
US4300358A (en) * 1979-05-15 1981-11-17 Fuji Electric Co., Ltd. Flat wall type refrigerated and chilled open display case
US4302946A (en) * 1979-02-02 1981-12-01 Tyler Refrigeration Corporation Refrigeration system using air defrost
US4304098A (en) * 1978-02-01 1981-12-08 Aktiebolaget Electrolux Method and apparatus for defrosting cooling elements in an open type freezer chest
US4319463A (en) * 1978-10-20 1982-03-16 Aktiebolaget Electrolux Refrigerated display chest
US4320631A (en) * 1981-01-23 1982-03-23 Emhart Industries, Inc. Air defrost for low-bed refrigerated display cases, utilizing sill-mounted auxiliary fan
US4326385A (en) * 1979-02-02 1982-04-27 Tyler Refrigeration Corporation Refrigerated merchandiser cabinet with air defrost ports
US4341082A (en) * 1979-02-14 1982-07-27 Tyler Refrigeration Corporation Open top refrigerated display case having ambient air defrost
EP0031953A3 (de) * 1980-01-03 1982-08-11 Eisvoigt Ludwig Voigtländer GmbH & Co KG Verfahren und Vorrichtung zum Konservieren und Gären von Teiglingen
US4361012A (en) * 1980-05-01 1982-11-30 Tyler Refrigeration Corporation Energy efficient refrigerated merchandiser display case
US4367632A (en) * 1981-05-08 1983-01-11 Tyler Refrigeration Corporation Flexible door operating mechanism for refrigerated merchandizer display cabinet
US4369631A (en) * 1979-12-07 1983-01-25 Tyler Refrigeration Corporation Refrigerated merchandizer display case adapted for energy conservation
US4369632A (en) * 1979-12-07 1983-01-25 Tyler Refrigeration Corporation Refrigerated merchandiser display case
US4375155A (en) * 1981-12-24 1983-03-01 Emhart Industries, Inc. Reach-in refrigerated display case with ambient air defrost
US4393664A (en) * 1981-12-24 1983-07-19 Emhart Industries, Inc. Multiple damper assembly for reach-in cases of the air defrost type
US4404816A (en) * 1981-04-14 1983-09-20 Tyler Refrigeration Corporation Modular refrigeration assembly having air defrost system
US4483153A (en) * 1983-02-02 1984-11-20 Emhart Industries, Inc. Wide island air defrost refrigerated display case having a defrost-only center passage
US5357767A (en) * 1993-05-07 1994-10-25 Hussmann Corporation Low temperature display merchandiser
US5983659A (en) * 1996-09-23 1999-11-16 Valeo Climatisation Method and apparatus for evacuating bad smells for an air conditioning installation for a motor vehicle
US6722149B1 (en) 2003-01-07 2004-04-20 Carrier Commercial Refrigeration, Inc. Refrigerated display merchandiser
WO2004062762A2 (en) 2003-01-07 2004-07-29 Carrier Commercial Refrigeration, Inc. Method for establishing an air curtain separation barrier
US20040163401A1 (en) * 2003-02-26 2004-08-26 Alahyari Abbas A. Refrigerated display merchandiser with improved air curtain
US20050076662A1 (en) * 2003-10-10 2005-04-14 Hussmann Corporation Evaporator for refrigerated merchandisers
US20050132744A1 (en) * 2003-12-22 2005-06-23 Hussmann Corporation Flat-tube evaporator with micro-distributor
US20050138943A1 (en) * 2003-01-07 2005-06-30 Carrier Commercial Refrigeration, Inc. Multi-band air curtain separation barrier
CN1332166C (zh) * 2004-06-14 2007-08-15 三洋电机株式会社 制冷储藏库
US20070251253A1 (en) * 2004-09-30 2007-11-01 Carrier Corporation Curtain Air Admission Assembly
US20130319030A1 (en) * 2012-02-17 2013-12-05 Hussmann Corporation Merchandiser with airflow divider
US20150314874A1 (en) * 2014-05-01 2015-11-05 The Boeing Company Optimally configured air-flow galley cart
US20160058207A1 (en) * 2014-08-26 2016-03-03 Hill Phoenix, Inc. Refrigeration system having a common air plenum
US20170258247A1 (en) * 2013-04-08 2017-09-14 Heatcraft Refrigeration Products Llc Deflector for Display Cases
US20180058746A1 (en) * 2012-10-22 2018-03-01 Whirlpool Corporation Low energy evaporator defrost
US9930974B2 (en) * 2012-08-22 2018-04-03 Aht Cooling Systems Gmbh Cooling device
US11085455B1 (en) * 2014-08-11 2021-08-10 Delta T, Llc System for regulating airflow associated with product for sale
US11304544B2 (en) * 2019-10-09 2022-04-19 Fri-Jado B.V. System comprising a display unit for storing and displaying food products, and multiple shelves, and method for storing and displaying food products in a display unit
US11576501B2 (en) * 2019-11-08 2023-02-14 Hill Phoenix, Inc. Guide vane for refrigerated display case

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JPS5358845A (en) * 1976-10-29 1978-05-27 Murata Mach Ltd Air curtain for winder
JPS5726154Y2 (enExample) * 1977-05-09 1982-06-07

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US3403525A (en) * 1967-02-03 1968-10-01 Dual Jet Refrigeration Co Defrost system for air curtain type refrigerated display case

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US3082612A (en) * 1961-02-13 1963-03-26 Dual Jet Refrigeration Company Refrigerated cabinet and defrosting means
US3403525A (en) * 1967-02-03 1968-10-01 Dual Jet Refrigeration Co Defrost system for air curtain type refrigerated display case

Cited By (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937033A (en) * 1975-02-07 1976-02-10 Kysor Industrial Corporation Air defrost display case
FR2306411A1 (fr) * 1975-04-03 1976-10-29 Anorga Joseph Evaporateur perfectionne de chambre froide
US4026121A (en) * 1975-05-20 1977-05-31 Fuji Denki Seizo Kabushiki Kaisha Defrosting in open show case of cold-air-circulation type
US4072488A (en) * 1976-12-10 1978-02-07 Kysor Industrial Corporation Air defrost reach-in refrigerated display cabinet
FR2373759A1 (fr) * 1976-12-10 1978-07-07 Kysor Industrial Corp Meuble d'etalage refrigere clos a degivrage par air
FR2383634A1 (fr) * 1977-03-16 1978-10-13 Kysor Industrial Corp Meuble d'etalage refrigere a degivrage par air
US4120174A (en) * 1977-03-16 1978-10-17 Kysor Industrial Corporation Air defrost display case
FR2389083A1 (fr) * 1977-04-25 1978-11-24 Tyler Refrigeration Corp Meuble refrigere d'etalage
US4144720A (en) * 1977-04-25 1979-03-20 Tyler Refrigeration Corporation Air defrost system using secondary air band components
US4207747A (en) * 1977-04-25 1980-06-17 Tyler Refrigeration Corporation Air defrost system using secondary air band components
US4304098A (en) * 1978-02-01 1981-12-08 Aktiebolaget Electrolux Method and apparatus for defrosting cooling elements in an open type freezer chest
US4283922A (en) * 1978-07-26 1981-08-18 Tyler Refrigeration Corporation Air defrost system using secondary air band components
US4319463A (en) * 1978-10-20 1982-03-16 Aktiebolaget Electrolux Refrigerated display chest
US4302946A (en) * 1979-02-02 1981-12-01 Tyler Refrigeration Corporation Refrigeration system using air defrost
US4326385A (en) * 1979-02-02 1982-04-27 Tyler Refrigeration Corporation Refrigerated merchandiser cabinet with air defrost ports
US4341082A (en) * 1979-02-14 1982-07-27 Tyler Refrigeration Corporation Open top refrigerated display case having ambient air defrost
US4265090A (en) * 1979-03-30 1981-05-05 Tyler Refrigeration Corporation Glass door merchandiser with ambient air defrost
US4245482A (en) * 1979-03-30 1981-01-20 Tyler Refrigeration Corporation Glass door merchandiser
US4300358A (en) * 1979-05-15 1981-11-17 Fuji Electric Co., Ltd. Flat wall type refrigerated and chilled open display case
US4267706A (en) * 1979-05-31 1981-05-19 Tyler Refrigeration Corporation Shop around refrigerated merchandiser
US4242882A (en) * 1979-07-19 1981-01-06 Tyler Refrigeration Corporation Glass door merchandiser
FR2473866A2 (fr) * 1979-08-29 1981-07-24 Tyler Refrigeration Corp Meuble d'etalage refrigere, ouvert a l'avant, presentant plusieurs conduits d'air avec degivrage par l'air ambiant, et son procede de mise en oeuvre
US4299092A (en) * 1979-12-07 1981-11-10 Tyler Refrigeration Corporation Energy conserving refrigerated merchandiser display case
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JPS50134249A (enExample) 1975-10-24

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