US2644736A - Heat reflecting hood - Google Patents

Heat reflecting hood Download PDF

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Publication number
US2644736A
US2644736A US255659A US25565951A US2644736A US 2644736 A US2644736 A US 2644736A US 255659 A US255659 A US 255659A US 25565951 A US25565951 A US 25565951A US 2644736 A US2644736 A US 2644736A
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United States
Prior art keywords
hood
case
heat
heat reflecting
refrigerated
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Expired - Lifetime
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US255659A
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Leonard W Atchison
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General Electric Co
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General Electric Co
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Priority to US255659A priority Critical patent/US2644736A/en
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Publication of US2644736A publication Critical patent/US2644736A/en
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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
    • A47F3/0482—Details common to both closed and open types
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/01—Radiant cooling

Definitions

  • My invention relates to refrigerated display cases and, more particularly, to a refrigerated display case having an open top such as is commonly used to display perishable food products.
  • Open top refrigerated cases are now q'uite'com monly used to display various foods and other perishable products which require refrigeration. Cases of this type are frequently installed in food markets and the like because they permit an open display of the articles contained therein and also provide convenient access for customers. Even so-called frozen foods which must be maintained at a temperature considerably below the freezing point are now displayed in this manner, it being possible to maintain the necessary low temperatures in a refrigerated case having neither a top wall more cover, However, certain dimculties are encountered in maintaining the desired low temperatures in open top refrigerated display cases because of thetransfer of heat into the refrigerated space by radiation from heat sources outside the "cabinet and also by air currents circulating into the refrigerated space. R
  • a display case generally represented by the reference character II], the plan of which is preferably, although not necessarily, of rectangular form.
  • the case ID has a compartment II Company, a. corporation of New formed therein by a plurality of insulated'up;
  • the compartment II is refrigerated by any su t-- able refrigerating apparatus (not shown) .infa manner Well known in the art.
  • v w in n The heat reflecting hood generally designated by the character I4 is illustrated as being detachably secured to, the side walls I2 of the refrigere ated case It, by means of -suitablefastener elements.
  • the'hood 14 could be made an integral part of-the refrigerated case I0, and such a construction is Within the scope of my invention.
  • the heatreflecting hood comprises two spaced side walls, one of which is shown at I5, having a sector-shapedv configuration, and anupwardly and forwardly inclined curved rear wall I6 extending from the upper edge of the rear wall of the casevloto a point directly above the front'wall, when the hood is mounted on the case.
  • the side edges of curved wall. I6. are joined to the curved edges of the side walls I5 to form aunitary'structure.
  • a corrugated heat reflecting panel Ilof polished aluminum or any other suitable reflectingmater rial is attached to the interior surface of the curved rear wall I6, the. attaching means .(not' shown). being preferably, but not necessarily, rivets or screws.
  • the corrugations of thepanel. I1 extend longitudinally of the panel I! and of the rear wall l6 of which the panel forms a part.
  • the upper edge portion I8 and lower edge portion I9 of corrugated panel I! are folded over so as to provide channel sections which may be conveniently secured to the rear wall I 6.
  • a suitable tubular electric lamp 20 appropriately mounted forilluminating the interior II of the case ID.
  • the rear wall is evenly curved, having a radius of curvature approximately equal to the distance from the front to the rear wall of refrigerated case In, and the included angle between adjacent corrugations of the corrugated panel I1 is approximately It has been found that this configuration of the corrugated panel insures the reflection of substantially all heat rays back out through the openin between the forward edges of the hood panel; the angles between adjacent corrugations may be varied to meet particular conditions to secure a maximum of reflection of heat rays back through the opening at the front of the cabinet.
  • the manner in which heat rays are reflected by the corrugated panel I1 is shown in the drawing, the path, of the heat rays being represented by broken lines with arrows to indicate direction of travel. It will be seen that some of the rays are reflected only once before leaving the hood while others pass through a double reflection, depending on the angle of incidence.
  • the heat reflecting hood l4 effectively prevents the entrance of heat rays intocompartment H of the case ID from the top and three of the four sides of the case.
  • substanwall, and an upright rear wall forming an opentop compartment, and a hood extending over said compartment, said hood comprising two sectorshaped side walls extending upwardly from said compartment side walls and a curved wall extending between the said sector-shaped side walls, said curved wall extending from the upper edge of said rear wall and terminating along a line directly above and spaced from said front wall whereby access may be had to the said compartment, the interior of said curved wall having a corrugated heat reflecting surface extending longitudinally tially all of the heat rays entering the open side of the hood I4 and striking the corrugated panel I!
  • the end walls I5 and rear wall l6 of the hood prevent air currents from entering the compartment l I from both the ends and rear of the case I0.
  • a hood for a refrigerated display case which not only substantially prevents radiant heat and air currents-from entering the display case from three sides and the top, but also substantially prevents radiant heat entering the 'open'side of the hood from being reflected downwardly into the food-storage compartment of the case.
  • a refrigerated display case comprising a bottom wall, two upright side walls, an upright front thereof, said surface being constructed and arranged to reflect outwardly through the opening directly above said front wall heat rays entering said opening and impinging on said surface.
  • a refrigerated display case comprising thermally insulated bottom, front, rear and side walls forming a cabinet enclosing a storage compartment having a top opening, a hood structure including a curved wall overhanging said opening and supported by a pair of side walls so as to provide an opening at the front of the hood, the radius of curvature of said curved wall being equal'to the distance between the front and rear walls of the case, and a horizontally corrugated sheet supported adjacent the under side of said curved wall, the included angle between adjacent corrugations being substantially 90, said sheet having a heat-reflecting surface and being constructed and arranged to reflect outwardly through said front opening heat rays entering said opening and impinging on said surface.

Description

y 1953 L. w. ATCHISON ,7
HEAT REFLECTING noon Filed Nov. 9, 1951 Inventor Leonard WAtchisOn,
His Attor- -e Patented July 7, 1953 HEAT REFLECTING 11001); i .5 LeonardW. AtchisdmErie, Pa., assignor to Gen eral Electric York 'Applicatin N rmta 9, 1951, Serial No. 255,659 I r.
' 3'" Claims. (01. 312-237) My invention relates to refrigerated display cases and, more particularly, to a refrigerated display case having an open top such as is commonly used to display perishable food products.
Open top refrigerated cases are now q'uite'com monly used to display various foods and other perishable products which require refrigeration. Cases of this type are frequently installed in food markets and the like because they permit an open display of the articles contained therein and also provide convenient access for customers. Even so-called frozen foods which must be maintained at a temperature considerably below the freezing point are now displayed in this manner, it being possible to maintain the necessary low temperatures in a refrigerated case having neither a top wall more cover, However, certain dimculties are encountered in maintaining the desired low temperatures in open top refrigerated display cases because of thetransfer of heat into the refrigerated space by radiation from heat sources outside the "cabinet and also by air currents circulating into the refrigerated space. R
Accordingly, it is an object of my inventionto provide means for preventing .or substantially reducing the transfer of heat-by'radiation' and convection into the interior of an open top refrigerated display case.
It is another object of my invention to provide a heat reflecting hood for open top refrigerated display cases which minimizes the entrance of heat rays into the interior of the case and also minimizes air circulation within the interior of the case.
It is a further object of my invention to provide a heat reflecting hood arranged to reflect through the open side of the hood those rays of heat which may enter through this open side.
Further objects and advantages of my invention will become apparent as the following description proceeds, and the features of novelty Which characterize my invention will be pointed out with particularity in the claims annexed to and forming a part of this specification.
For a better understanding of my invention, reference is made to the accompanying drawin in which the single figure is a sectional elevation view through a refrigerated display case including an embodiment of my invention.
Referring to the drawing, I have shown therein a display case generally represented by the reference character II], the plan of which is preferably, although not necessarily, of rectangular form. The case ID has a compartment II Company, a. corporation of New formed therein by a plurality of insulated'up;
right walls'IZ and an insulated bottom wall 3.
The compartment II is refrigerated by any su t-- able refrigerating apparatus (not shown) .infa manner Well known in the art. v w in n The heat reflecting hood generally designated by the character I4 is illustrated as being detachably secured to, the side walls I2 of the refrigere ated case It, by means of -suitablefastener elements. However, it is obviousthat the'hood 14 could be made an integral part of-the refrigerated case I0, and such a construction is Within the scope of my invention. The heatreflecting hood comprises two spaced side walls, one of which is shown at I5, having a sector-shapedv configuration, and anupwardly and forwardly inclined curved rear wall I6 extending from the upper edge of the rear wall of the casevloto a point directly above the front'wall, when the hood is mounted on the case. The side edges of curved wall. I6. are joined to the curved edges of the side walls I5 to form aunitary'structure.
' A corrugated heat reflecting panel. Ilof polished aluminum or any other suitable reflectingmater rial is attached to the interior surface of the curved rear wall I6, the. attaching means .(not' shown). being preferably, but not necessarily, rivets or screws. ,The corrugations of thepanel. I1 extend longitudinally of the panel I! and of the rear wall l6 of which the panel forms a part. The upper edge portion I8 and lower edge portion I9 of corrugated panel I! are folded over so as to provide channel sections which may be conveniently secured to the rear wall I 6. At the upper longitudinal edge of the hood I4 is a suitable tubular electric lamp 20 appropriately mounted forilluminating the interior II of the case ID.
As illustrated in the drawing, the rear wall is evenly curved, having a radius of curvature approximately equal to the distance from the front to the rear wall of refrigerated case In, and the included angle between adjacent corrugations of the corrugated panel I1 is approximately It has been found that this configuration of the corrugated panel insures the reflection of substantially all heat rays back out through the openin between the forward edges of the hood panel; the angles between adjacent corrugations may be varied to meet particular conditions to secure a maximum of reflection of heat rays back through the opening at the front of the cabinet. The manner in which heat rays are reflected by the corrugated panel I1 is shown in the drawing, the path, of the heat rays being represented by broken lines with arrows to indicate direction of travel. It will be seen that some of the rays are reflected only once before leaving the hood while others pass through a double reflection, depending on the angle of incidence.
It is apparent that the heat reflecting hood l4 effectively prevents the entrance of heat rays intocompartment H of the case ID from the top and three of the four sides of the case. Also, substanwall, and an upright rear wall forming an opentop compartment, and a hood extending over said compartment, said hood comprising two sectorshaped side walls extending upwardly from said compartment side walls and a curved wall extending between the said sector-shaped side walls, said curved wall extending from the upper edge of said rear wall and terminating along a line directly above and spaced from said front wall whereby access may be had to the said compartment, the interior of said curved wall having a corrugated heat reflecting surface extending longitudinally tially all of the heat rays entering the open side of the hood I4 and striking the corrugated panel I! are reflected out again and thus are neither reflected into compartment ll nor absorbed by the rear wall I6. Furthermore, the end walls I5 and rear wall l6 of the hood prevent air currents from entering the compartment l I from both the ends and rear of the case I0.
From the above description, it will be seen that I have provided a hood for a refrigerated display case which not only substantially prevents radiant heat and air currents-from entering the display case from three sides and the top, but also substantially prevents radiant heat entering the 'open'side of the hood from being reflected downwardly into the food-storage compartment of the case. These desirable objects are obtained without sacrificing any advantages of an open top display case, the contents of the storage compartment being both visible and easily accessible. through the open side of the hood and the open top of the case.
While I have shown a particular embodiment of my invention, I do not desire my invention to be limited to the particular construction shown, and I intend in the appended claims to cover all modifications within the spirit and scope of: my,
invention. What I claim as new and desire to secure by Letters Patent of the United States is:
1. A refrigerated display case comprising a bottom wall, two upright side walls, an upright front thereof, said surface being constructed and arranged to reflect outwardly through the opening directly above said front wall heat rays entering said opening and impinging on said surface.
' 2. The structure of claim 1 in which the included angle between adjacent corrugations of the corrugated heat reflecting surface is substantially degrees. I
3. A refrigerated display case comprising thermally insulated bottom, front, rear and side walls forming a cabinet enclosing a storage compartment having a top opening, a hood structure including a curved wall overhanging said opening and supported by a pair of side walls so as to provide an opening at the front of the hood, the radius of curvature of said curved wall being equal'to the distance between the front and rear walls of the case, and a horizontally corrugated sheet supported adjacent the under side of said curved wall, the included angle between adjacent corrugations being substantially 90, said sheet having a heat-reflecting surface and being constructed and arranged to reflect outwardly through said front opening heat rays entering said opening and impinging on said surface.
LEONARD W. ATCHISON.
References Cited in the file of this patent UNITED STATES'PATENTS
US255659A 1951-11-09 1951-11-09 Heat reflecting hood Expired - Lifetime US2644736A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2855760A (en) * 1956-10-03 1958-10-14 Edward W Simons Method and means for maintaining material at a predetermined temperature in an open compartment
US3310102A (en) * 1962-12-27 1967-03-21 Centre Nat Rech Scient Devices for lowering the temperature of a body by heat radiation therefrom
US5421170A (en) * 1991-05-30 1995-06-06 Termofrost Ab Arrangement relating to refrigerator and freezer gondolas
DE29512039U1 (en) * 1995-07-26 1995-09-28 Isfort Paul Freezer cover
US5800905A (en) * 1990-01-22 1998-09-01 Atd Corporation Pad including heat sink and thermal insulation area
US5827057A (en) * 1995-07-10 1998-10-27 Cress; Steven B. Vacuum furnace method and apparatus
WO2007105204A2 (en) * 2006-03-10 2007-09-20 Rami Abraham Kalfon Refrigerator illumination system
US20110049253A1 (en) * 2009-08-27 2011-03-03 Thomas & Betts International, Inc. Radiant heat reflector and heat converter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2060088A (en) * 1934-07-28 1936-11-10 Alfred M Lane Reflector for heat radiators
US2441463A (en) * 1946-02-28 1948-05-11 Achs Nicholas Refrigerated display case
US2534488A (en) * 1946-06-21 1950-12-19 Weber Showcase & Fixture Co In Refrigerated structure with curved door
US2547342A (en) * 1946-12-03 1951-04-03 Patrick A Nirdlinger Reflecting mat for display windows

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2060088A (en) * 1934-07-28 1936-11-10 Alfred M Lane Reflector for heat radiators
US2441463A (en) * 1946-02-28 1948-05-11 Achs Nicholas Refrigerated display case
US2534488A (en) * 1946-06-21 1950-12-19 Weber Showcase & Fixture Co In Refrigerated structure with curved door
US2547342A (en) * 1946-12-03 1951-04-03 Patrick A Nirdlinger Reflecting mat for display windows

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2855760A (en) * 1956-10-03 1958-10-14 Edward W Simons Method and means for maintaining material at a predetermined temperature in an open compartment
US3310102A (en) * 1962-12-27 1967-03-21 Centre Nat Rech Scient Devices for lowering the temperature of a body by heat radiation therefrom
US5800905A (en) * 1990-01-22 1998-09-01 Atd Corporation Pad including heat sink and thermal insulation area
US5421170A (en) * 1991-05-30 1995-06-06 Termofrost Ab Arrangement relating to refrigerator and freezer gondolas
US5827057A (en) * 1995-07-10 1998-10-27 Cress; Steven B. Vacuum furnace method and apparatus
DE29512039U1 (en) * 1995-07-26 1995-09-28 Isfort Paul Freezer cover
WO2007105204A2 (en) * 2006-03-10 2007-09-20 Rami Abraham Kalfon Refrigerator illumination system
WO2007105204A3 (en) * 2006-03-10 2008-01-24 Rami Abraham Kalfon Refrigerator illumination system
US20090301124A1 (en) * 2006-03-10 2009-12-10 Rami Abraham Kalfon Refrigerator illumination system
US20110049253A1 (en) * 2009-08-27 2011-03-03 Thomas & Betts International, Inc. Radiant heat reflector and heat converter
US9022298B2 (en) * 2009-08-27 2015-05-05 Reznor Llc Radiant heat reflector and heat converter

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