US3130559A - Multiple jet conditioning cabinet - Google Patents

Multiple jet conditioning cabinet Download PDF

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Publication number
US3130559A
US3130559A US110713A US11071361A US3130559A US 3130559 A US3130559 A US 3130559A US 110713 A US110713 A US 110713A US 11071361 A US11071361 A US 11071361A US 3130559 A US3130559 A US 3130559A
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US
United States
Prior art keywords
air
panels
panel
nozzles
cabinet
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.)
Expired - Lifetime
Application number
US110713A
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English (en)
Inventor
Beckwith Sterling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dual Jet Refrigeration Co
Original Assignee
Dual Jet Refrigeration Co
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 Dual Jet Refrigeration Co filed Critical Dual Jet Refrigeration Co
Priority to US110713A priority Critical patent/US3130559A/en
Priority to GB15821/62A priority patent/GB1001403A/en
Priority to DK222562AA priority patent/DK117155B/da
Priority to CH594162A priority patent/CH415704A/de
Application granted granted Critical
Publication of US3130559A publication Critical patent/US3130559A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • This invention relates to the conditioning of an enclosed space having one side which is open to the atmosphere for yaccess to the interior of the conditioned space Ifor observation of the contents therein or for displacernent of material into and out of said conditioned space.
  • conditioning or conditioned space is intended to refer to the maintenance of the space under variously desired conditions, such for example ⁇ as under oxidizing conditions, as by the use of oxidizing ygases (oxygen); reducing conditions, as by use of reducing gases (hydrogen); inert conditions, as by use of an inert gas (argon); refrigerated conditions, as by the use of refrigerated air; heating conditions, as by the use of heated air; moist conditions, as by the use of air at high humidity; and dessicating conditions, as by the use of dry ⁇ air, etc.
  • oxidizing ygases oxygen
  • reducing conditions as by use of reducing gases (hydrogen)
  • inert conditions as by use of an inert gas (argon)
  • refrigerated conditions as by the use of refrigerated air
  • heating conditions as by the use of heated air
  • moist conditions as by the use of air at high humidity
  • dessicating conditions as by the use of dry ⁇ air, etc.
  • the invention will hereinafter be described with reference to the use of the enclosed space as a part of a refrigerated display cabinet for frozen or refrigerated foods whereby the storage Ispace is adapted to be maintained in a refrigerated state having a ternperature at or below freezing.
  • the same concepts for maintenance of the space in a refrigerated state will apply in the maintenance of the space lat Others of the described conditions, as will become apparent from the following.
  • the air curtain is adapted to be formed of adjacent panels of air with the inner panel corresponding to the condition desired to be maintained within the enclosed space and the outer panel corresponding more closely to the ⁇ ambient atmosphere with one or more panels in between, if desired, corresponding to conditions intermediate the inner panel and the outer panel.
  • the inner panel is referred to as the conditioned panel while the louter panels can be referred to as the guard panels.
  • an air curtain formed of but two panels comprising an inner cold air panel which is refrigerated yand continuously recircn'lated and ⁇ an outer ambient ⁇ air panel which is cut olf from the cold air par el for return to the atmosphere.
  • FIGURE l is a schematic sectional elevational View of a conditioning chamber embodying the features of this invention.
  • FiGURE 2 is a sectional elevational View similar to that of FIGURE l showing a modification in the construction of the cabinet;
  • FIGURE 3 is an enlarged detailed sectional View of the arrangement of nozzles which may be employed in accordance with the practice of this invention in the modication of the cabinet shown in FIGURE l;
  • FIGURE 4 is a sectional elevational view similar to that of FIGURE 3 showinL7 a further modification in the nozzle construction and arrangement;
  • FiGURE 5 is a sectional elevational view similar to that of FIGURE 3 showing the nozzle arrangement as employed in the construction of the cabinet shown in FIG. 2.
  • FIGS. 1 and 2 of the drawings illustration is made of a conditioning device formed or an enclosure having a top wall 12, a back wall 14, a bottom wall 16, side walls (not shown), and a front wall 18'.
  • the front v a wall is formed with an access opening communicating the enclosed space 22 within the housing with the outside atmosphere.
  • the housing rests upon a suitable 'base 274.
  • inner Walls includeing a top wall 26, back wall 28, bottom Wall 30, front wall 32 and side walls 34, all of which dene the enclosed space 22.
  • the space between the innerrwalls and the outer walls is subdivided in FIG. 1 'by a partitioning Wall 36 to define two separated passages 38 and 40 which extend substantially continuously about the storage space 22 from the outlet openings 39 and 41 4across one edge of the opening 20 to inlets 42 and 44 across the opposite edge of the opening 20.
  • the inner passage 38 is provided with refrigeration coils 46 through which a suitable refrigerant is circulated for indirect heat exchange with the air travelling through the passage 38 for the refrigeration thereof.
  • the refrigeration means 46 is illustrated as being located centrally within the passage 38, it will be understood that the refrigeration means may be disposed in other parts of the passage 3S but preferably in the direction towards the inlet 42.
  • an air circulating means such as a fan or blower 48 which induces the ow of a stream of air through the passage 33 from the inlet 42 to the outlet 39 and, in accordance with the concepts of this invention, from the outlet 39, across the open space to the inlet 42 for recirculation of the cold air stream.
  • an air circulating means such as a fan or blower 50, for inducing the ow of an air stream through the passage 40 from the inlet 44 to the outlet 41 and then, in accordance with the concepts of this invention, from the outlet 41 across the open space 20 to the inlet 44 for recirculation of the guard jet.
  • the outlet 39 of the inner passage 38 is in the form of a nozzle 52, such as a vaned or honeycomb section, preferably dimensioned to have a length greater than 1 inch, but less than about 6 inches, for directional control of air flow, and which extends continuously across the top side of the access opening 20 in the front Wall of the cabinet.
  • the outlet 41 for the outer passage 40 is in the form of a nozzle 54 of a vaned or honeycomb section which also extends substantially continuously across the top side of the access opening 20 along the notzhzle 52 and in substantially parallel relationship therew1v
  • the streams of air issuing from the outlets 39 and 41 form continuous inner and outer air panels 56 and 58 respectively which extend across the access opening 20 from the outlets 39 and 41 to the inlets 42 and 44.
  • Both of the inlets can be provided with screening members 60 to prevent entrainment of solid material, insects and the like into the air streams.
  • an inner cold air panel 56 and an outerpwarmer air panel 58 which is intermediate the temperature of the cold air panel and the ambient air.
  • the guard panel S8 at intermediate temperature, operates to guard the cold air from the heat of the atmosphere and to minimize the loss of cold air into the atmosphere since air entrained from the guard panel into the cold air panel will be at considerably lower temperature than the air from the atmosphere which otherwise would be the admixed component.
  • the arrangement for recirculation of one or more guard jets in combination with the cold or conditioned air jet to form an air curtain extending across the access opening also operates to enhance the laminar ilow characteristics of the air panels whereby a minimum amount of intermixing of air in the panels occurs.
  • additional guard jets may be provided whereby the air panels extending across the access opening 20 will correspond to the number of such jets.
  • an additional partition is provided in the cabinet to make available a third passage 70 provided with its own fan or blower 72 for lthe recirculation of an outer air stream Vthrough the passage 70 from an inlet 74 to an outlet 76 and, in accordance with the concepts of this invention, from the outlet 76 across the open space to the inlet 74.
  • the air curtain is provided with a third air panel 78 which is located outwardly adjacent to the air panels S and 56.
  • This -invention is :addressed to la still further concept for improving the laminar flow characteristics of lthe air curtain thereby to reduce intermixing and further to increase the eliiciency of operation of the conditioning system.
  • one of the concepts ⁇ of this invention is to arrange the nozzles -so that the ⁇ outlet nozzles terminate with the adjacent edges in side-.by-side relationship with a minimum of Wall space in between and preferably without any projection extending outwardly beyond the nozzles to extend linto the space between panels.
  • Another important concept of this invention resides in the further arrangement of the outlet nozzles 52, 54 and/ or 76 at slightly converging angles to cause mergence of the air panels .almost immediately upon issuance from the nozzles thereby to minimize the existence of a spaced relationship between panels.
  • the angle of convergence need be only a few degrees but not more than about It is preferred to construct the nozzles for an angle of convergence within a range of from 5 to 15 therebetween and preferably with the nozzles arranged for issuance of the panels in side-by-side relationship with practically no space in between.
  • the inner conditioned panel has application also independently of the direction of travel of the air panels that is from top to bottom across the open space, or from bottom to top, or Ifrom side to side across the open space or whether the inner conditioned panel is a cold air panel for maintaining .a refrigerated state, a hot fair panel for maintaining a heated state, a dry air panel for maintaining a dessicated state, a hydrogen enriched -air panel for providing a yreducing atmosphere, an oxygen enriched air panel ⁇ for maintaining an oxidizing state or the like within the conditioned space 22.
  • the inner panel is a cold air panel for maintaining a refrigerated state .within the cabinet for use in the display and storage of frozen foods
  • a further important concept of this invention resides in the construction, as illustrated in FIGURE 4, wherein a thermal insulating barrier -Si is permitted to be provided between the angled nozzles 52 and 54 ⁇ forming the cold ⁇ air panel and the adjacent guard panel.
  • the nozzles with a heating element 82 lining the outside wall of the nozzle with the heating element 82 preferably being in the'form of resistance wires lying adjacent the outer surface of the nozzle so 'as to be out of the path of the air stream liowing therethrough.
  • the heating element it is desirable to extend the heating element beyond the ingoing side of the nozzle to preheat the adjacent portions of the air stream before engagement with the nozzle thereby :to militate against separation of snowsr on the ingoing side of the nozzle upon being contacted with the relatively swiftly moving stream of air making up the guard jet.
  • a cabinet yhaving an access opening in one side communicating a storage space within the cabinet with the ambient atmosphere, at least two outlet nozzle extending continuously across one side of the -access opening and corresponding inlet members extending across the opposite side of the opening, and means for continuously circulating panels of air from the outlet nozzles of the inlets across the opening with the inner panel being a conditioned air panel, ⁇ the improvement which comprises angling the outlet nozzles for convergence in the direction towards each other at the outlet end portion to merge the air panels issuing from the nozzles into a continuous air curtain owing across the access opening with the conditi-oned air panel located inwardly in the yair curtain.
  • a cabinet as claimed in claim l in which the outlet nozzles are positioned at an angle of convergence with the range of 3 to 30.
  • a display cabinet having an access opening in one side communicating a storage space /within the cabinet with the ambient atmosphere, at least two outlet nozzles extending continuously across the one side of the access opening and corresponding inlet members extending across the opposite side of the opening, and means for continuously circulating panels of air from 'the respective outlet nozzles to the inlet members across the access opening with the inner panel being a conditioned air panel
  • the improvement which comprises positioning the outlet nozzles in -side-by-side parallel relationship across the one side of the access opening with a thin Iwall separating the adjacent edges at the outlet end of the nozzles to .avoid tlie formation of a dead space between the air panels issuing from the nozzles, and positioning the nozzles at an angle converging inthe direction towards each other, and positioning adjacent nozzles at an angle of convergence to merge the air panels issuing from the nozzles into a continuous air curtain flowing across the access opening with the conditioned air panel located inwardly in the curtain.
  • a refrigerated display cabinet having an access opening in one side communicating a storage space adapted to be refrigerated within the cabinet with the ambient atmosphere, at least two outlet nozzles extending conresponding inlet members extending across the opposite side of the opening, means for continuously circulating panels of air from the "outlet nozzles to the inlet members ⁇ across the access opening With the inner panel being a cold air panel, and means recirculating the air panels from the inlet members to the outlet nozzles, the improvement which comprises positioning the outlet nozzles in side-by-side parallel relationship across the one side of the access opening with .a minimum of spaced relationship between the ⁇ adjacent edges at the outlet end to avoid the formation of la dead air space between the air panels issuing from the nozzles 'and angling the outlet nozzles to converge in the direction towards each other for mergence of the air panels into a continuous air curtain flowing ⁇ across the access opening with the cold ⁇ air panel located inwardly of the remainder.
  • a refrigerated cabinet as claimed in claim 7, which* includes a heating element alongside the adjac'emmair nozzle ⁇ between the ⁇ adjacent air. nozzle and the cold lair nozzle.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
US110713A 1961-05-17 1961-05-17 Multiple jet conditioning cabinet Expired - Lifetime US3130559A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US110713A US3130559A (en) 1961-05-17 1961-05-17 Multiple jet conditioning cabinet
GB15821/62A GB1001403A (en) 1961-05-17 1962-04-25 An improved refrigerated cabinet
DK222562AA DK117155B (da) 1961-05-17 1962-05-16 Skab med en åben side med dyser til dannelse af et lufttæppe over åbningen.
CH594162A CH415704A (de) 1961-05-17 1962-05-16 Kühltruhe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US110713A US3130559A (en) 1961-05-17 1961-05-17 Multiple jet conditioning cabinet

Publications (1)

Publication Number Publication Date
US3130559A true US3130559A (en) 1964-04-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US110713A Expired - Lifetime US3130559A (en) 1961-05-17 1961-05-17 Multiple jet conditioning cabinet

Country Status (4)

Country Link
US (1) US3130559A (da)
CH (1) CH415704A (da)
DK (1) DK117155B (da)
GB (1) GB1001403A (da)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3282193A (en) * 1963-04-19 1966-11-01 Minikay Ltd Air curtains
US3287929A (en) * 1965-06-30 1966-11-29 Dual Jet Refrigeration Company Refrigerated cabinet with improved nozzle construction
US3397631A (en) * 1966-08-01 1968-08-20 Dualjet Corp Air curtain using ionized air
US4840040A (en) * 1988-09-22 1989-06-20 American Standard Inc. Island type refrigeration display cabinet
US5195888A (en) * 1991-08-19 1993-03-23 Praxair Technology, Inc. Multi-layer fluid curtains for furnace openings
US5357767A (en) * 1993-05-07 1994-10-25 Hussmann Corporation Low temperature display merchandiser
US6041616A (en) * 1998-11-09 2000-03-28 Daewoo Electronics Co., Ltd. Cool air circulation apparatus in a refrigerator
US20050005611A1 (en) * 2001-11-01 2005-01-13 Norio Owada Highly-efficient freezing apparatus and highly-efficient freezing method
WO2006115824A3 (en) * 2005-04-25 2007-01-18 Capital Formation Inc Air curtain system for a refrigerated case
US20100058789A1 (en) * 2008-09-11 2010-03-11 Hill Phoenix, Inc Air distribution system for temperature-controlled case
US20100291856A1 (en) * 2007-10-16 2010-11-18 Handelsmaatschappij Willy Deweerdt Bvba Device for generating an air wall

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US983877A (en) * 1910-02-02 1911-02-14 Henry H Cummings Air-screen.
US2794325A (en) * 1956-03-13 1957-06-04 Gen Motors Corp Refrigerated display case
US2836039A (en) * 1955-09-19 1958-05-27 Weber Showcase & Fixture Co In Refrigerated self-service showcase
US3063256A (en) * 1961-08-17 1962-11-13 Lamb Frank Gilbert Upright refrigerator showcase
US3063252A (en) * 1961-08-17 1962-11-13 Lamb Frank Gilbert Upright refrigerator showcase

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US983877A (en) * 1910-02-02 1911-02-14 Henry H Cummings Air-screen.
US2836039A (en) * 1955-09-19 1958-05-27 Weber Showcase & Fixture Co In Refrigerated self-service showcase
US2794325A (en) * 1956-03-13 1957-06-04 Gen Motors Corp Refrigerated display case
US3063256A (en) * 1961-08-17 1962-11-13 Lamb Frank Gilbert Upright refrigerator showcase
US3063252A (en) * 1961-08-17 1962-11-13 Lamb Frank Gilbert Upright refrigerator showcase

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3282193A (en) * 1963-04-19 1966-11-01 Minikay Ltd Air curtains
US3287929A (en) * 1965-06-30 1966-11-29 Dual Jet Refrigeration Company Refrigerated cabinet with improved nozzle construction
US3397631A (en) * 1966-08-01 1968-08-20 Dualjet Corp Air curtain using ionized air
US4840040A (en) * 1988-09-22 1989-06-20 American Standard Inc. Island type refrigeration display cabinet
US5195888A (en) * 1991-08-19 1993-03-23 Praxair Technology, Inc. Multi-layer fluid curtains for furnace openings
US5336085A (en) * 1991-08-19 1994-08-09 Praxair Technology, Inc. Multi-layer fluid curtains for furnace openings
US5357767A (en) * 1993-05-07 1994-10-25 Hussmann Corporation Low temperature display merchandiser
US6041616A (en) * 1998-11-09 2000-03-28 Daewoo Electronics Co., Ltd. Cool air circulation apparatus in a refrigerator
US20050005611A1 (en) * 2001-11-01 2005-01-13 Norio Owada Highly-efficient freezing apparatus and highly-efficient freezing method
US7237400B2 (en) * 2001-11-01 2007-07-03 Abi Co., Ltd Highly-efficient freezing apparatus and highly-efficient freezing method
WO2006115824A3 (en) * 2005-04-25 2007-01-18 Capital Formation Inc Air curtain system for a refrigerated case
US8647183B2 (en) 2005-04-25 2014-02-11 Hill Phoenix, Inc. Air curtain system for a refrigerated case
US20100291856A1 (en) * 2007-10-16 2010-11-18 Handelsmaatschappij Willy Deweerdt Bvba Device for generating an air wall
US9551500B2 (en) 2007-10-16 2017-01-24 Handelsmaatschappij Willy Deweerdt Bvba Device for generating an air wall
US20100058789A1 (en) * 2008-09-11 2010-03-11 Hill Phoenix, Inc Air distribution system for temperature-controlled case
US9526354B2 (en) 2008-09-11 2016-12-27 Hill Phoenix, Inc. Air distribution system for temperature-controlled case

Also Published As

Publication number Publication date
CH415704A (de) 1966-06-30
DK117155B (da) 1970-03-23
GB1001403A (en) 1965-08-18

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