US3331942A - Domestic oven with smoke leakage prevention - Google Patents

Domestic oven with smoke leakage prevention Download PDF

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Publication number
US3331942A
US3331942A US436615A US43661565A US3331942A US 3331942 A US3331942 A US 3331942A US 436615 A US436615 A US 436615A US 43661565 A US43661565 A US 43661565A US 3331942 A US3331942 A US 3331942A
Authority
US
United States
Prior art keywords
oven
air
chamber
cavity
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
US436615A
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English (en)
Inventor
George A Scott
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Priority to US436615A priority Critical patent/US3331942A/en
Priority to GB8819/66A priority patent/GB1131016A/en
Priority to NL6602693A priority patent/NL6602693A/xx
Priority to DE1966G0046201 priority patent/DE1579664B2/de
Application granted granted Critical
Publication of US3331942A publication Critical patent/US3331942A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J39/00—Heat-insulated warming chambers; Cupboards with heating arrangements for warming kitchen utensils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
    • F24C14/02—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning pyrolytic type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/006—Arrangements for circulation of cooling air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators

Definitions

  • This cooling air tends to draw smoke from the oven cavity through oven component mounting openings in the said walls during an oven heating cycle.
  • This smoke leakage is prevented by a shroud that encircles the oven components either individually or as a group and blocks the cooling chamber to isolate the components from the negative pressure area induced by the air circulating means.
  • the present invention relates to domestic baking ovens and particularly to -a high temperature oven that is provided with an air cooling means outside of the oven cavity for removing some of the heat in the walls of the oven liner so as to restrict the maximum external temperatures of the oven cabinet.
  • This invention was conceived during the development of a built-in wall oven design that incorporates a high temperature self-cleaning oven cycle using the principle of pyrolysis for removing the food soil and grease spatter from the surfaces of the oven liner.
  • the basic principles of a self-cleaning oven are described and claimed in the recent patent of Bohdan Hurko, No. 3,121,158, which is assigned to General Electric Company, assignee of the present invention.
  • Such a self-cleaning oven cycle has a maximum oven temperature between about 750 F. and about 950 F.
  • the principal object of the present invention is to provide a domestic oven with an air cooling system around the outside of the oven liner with means for preventing the leakage of smoke into the cooling system.
  • a further object of the present invention is to provide, in the external air cooling system of a high temperature oven, a shroud means to isolate the possible avenues of smoke leakage from the cooling system.
  • a still further object of the present invention is to provide a high temperature oven with an external air cooling system where a negative pressure area in the cooling system is isolated from any air leakage paths from the oven cavity.
  • the present invention in accordance with one form thereof, is embodied in a domestic oven having inner walls defining an oven cooking cavity where the Walls are surrounded 'by an oven cabinet that is spaced therefrom to form a cooling air chamber.
  • An air circulation means is combined with the air chamber for creating a draft of relatively cool room air to remove some of the heat present in the oven liner walls.
  • Certain oven components are mounted through one wall of the oven liner, and a partition or isolation means serves to close the air chamber in this vicinity and prevent the reduced air pressure area of the air circulation means from drawing smoke from out of the oven cavity.
  • FIGURE 1 is a right side elevational view of an electric Ioven for use as a built-in wall oven with parts broken away and some in cross-section to show the means for removing some of the heat from the oven liner walls, as well as the means for preventing smoke leakage into the cooling system;
  • FIGURE 2 is a fragmentary cross-sectional plan view at the back of the oven taken on the lines 2-2 of FIGURE 1 to show the isolation means to prevent smoke leakage from the oven cavity into the cooling air circulation system;
  • FIGURE 3 is a rear elevational view of the oven of FIGURE l with parts broken away along the left side of the oven to show the air space between the insulation guard and outer oven cabinet as well as the nature of the oven components mounted through the back wall of the oven liner.
  • FIG. 1 a right side elevational view of a built-in wall oven 10 having an oven cavity 11 formed by a box-like oven liner 12 with a front opening that is adapted to be closed by an oven door 13.
  • This particular oven in an electric oven having a lower baking element 14 and an upper broiling element 15, as is conventional in this art.
  • An additional heating means is used in the form of ya perimeter or mullion heater 17 adjacent the front of the oven and encircling the oven liner so as to compensate for heat loss through and around the oven door as well as for obtaining generally uniform temperature throughout the oven cavity during the high temperature heat cleaning cycle, as was mentioned heretofore.
  • thermal insulation 19 such as berglass or the like, is assembled around the outside of the oven liner 12 for retaining as much of the oven heat as is possible within the open cavity.
  • the oven door 13 is heavily insulated as compared with a standard oven door.
  • a special high temperature door gasket 21 is adapted to be compressed against the front peripheral edge of the oven liner 12 for sealing the oven cavity when the -door is closed as well as restricting the amount of air that enters the cavity during the heat-cleaning cycle so as to control the rate of decomposition of the food soil.
  • an oven door latching mechanism 22 diagrammatically shown as only a latch handle for locking the oven door 13 in the closed position and preventing the unlocking thereof while the oven temperature is labove a predetermined maximum cooking temperature.
  • Su-ch a door latching mechanism does not form part of the present invention, therefore, it is neither shown nor described in detail as many different types of door latching mechanisms m-ay be used without departing from the scope of the present invention.
  • an insulation guard 24 of thin sheet metal surrounds the insulation especially adjacent the bottom of the oven and along t-he vertical walls, that is, the two side walls and the back wall. This support means is not as necessary at the top wall because of the force of gravity.
  • the insulation guard 24 is a box-like structure into which the insulation 19 is assembled prior to the insertion of the oven liner 12 through the front wall of the 4outer cabinet of the oven.
  • An outer oven cabinet structure 26 sur-rounds the insulation guard and is spaced outwardly therefrom to provide an :air space 27 that completely surrounds the insulated oven liner as is best seen in FIGURES 1 and 2. Also, in actual practice it is easier to assemble these various oven elements from the outside in rather than from the inside out as has been described above.
  • a control panel 32 is positioned above the oven door 13 and it contains the various electrical controls indicated broadly as element 33 and including such devices as an oven selector switch, an oven thermostat, a clock-timer, meat thermometer indicator and perhaps a convenience outlet. Such devices are not shown but they are readily recognizable by those skilled in this art. Beneath the control panel 32 is shown the beforementioned handle 22 for operating the door latching mechanism.
  • the handle extends through a suitable elongated slot in an open ⁇ grill work 34 which serves as an air outlet means for the air space 27.
  • Behind the grill '34 is -a second grill 35 which serves to obstruct vision into the air space 27 behind the control panel 32.
  • a blower means 36 in the form of a motor driven fan 37, is mounted in the air space 27 at the top of the oven for directing air toward the control components 33 positioned 'behind the control panel 32 so as to draw relatively cool room air into the air space 27 through the air inlet openings 29 ⁇ and 30 and carry the air generally towards the back of the oven and up the back and sides and then across the top and out through the air outlet opening 34 beneath the control panel 32.
  • the oven 1t? is also supplied with a catalytic oxidation unit 39 mounted over an opening in the top wall of the oven liner 12 and serving -as a venting means for the oven cavity 11 so that the hot gases emanating from the oven cavity pass through the oxidation unit Where they are further decomposed before vbeing returned to the kitchen through a horizontal duct work 40 having a nozzle 41.
  • This oxidation unit 39 is of the general type described and claimed in the patent of Stanley B. Welch, No. 2,900,483, which is assigned to the General Electric Company, assignee of the present' invention, and it does not form part of the present invention.
  • oven components are mounted through the lback wall of t-he oven liner 12 as is best seen in FIGURES 1 and 3.
  • Usually small clearances are provided around these oven components in the back wall of the oven liner 12 as well as in the insulation guard 24 in order to allow for both expansion and contraction of the different materials having dissimilar coeiicients of thermal expansion.
  • the bake element 14 is adapted to be hinged at its supported end at the back wall of t-he oven liner so that it may be tilted up slightly for ease of sweeping away a slight amount of ash that may form on the bottom lwall of the oven liner.
  • This hinging action also requires oversized openings in the back wall for the extension of the bake unit terminals therethrough las will be understood by those skilled in the art.
  • ⁇ a single four-sided shroud Sil encircles the several oven components 45-48 and extends rearwardly between the insulation guard 24 and the outer oven cabinet 26, as is best seen in FIGURE 2.
  • This shroud 50 is in the form of a series of four Z-shaped angular members arranged in a rectangular coniiguration as elements SL54, as is seen in FIGURE 3.
  • the back wall of the outer oven cabinet 26 is removable so as to permit access to the oven components 45-48 for assembly and wiring purposes.
  • the space encompassed by the shroud 50 may be considered as a Wiring chamber S5 that is separate or isolated from the air space 27.
  • louvers are shown .at the bottom and some are at the top of the oven so as to obtain a slight chimney effect of room air passing through the wiring chamber, but in a sepa-rate closed circuit from the cooling -air that passes through the air space 27, as mentioned heretofore.
  • a domestic oven comprising inner walls defining an oven cooking cavity, one wall having an access opening and a door for closing said opening, heating means in heat transfer relation with the ⁇ oven cavity for cooking foods placed therein, thermal insulating means surrounding the walls of the oven cavity, an outer oven cabinet surrounding the insulated oven Walls but outwardly spaced therefrom to form a cooling air chamber therebetween, the air chamber having an air inlet means and an air outlet means, draft inducing means within the oven cabinet for moving cooling lair through the air chamber, and a shroud in the air chamber for formin-g a wiring chamber adjacent the back of the oven that is closed to the air chamber, and vent openings in the exterior of the oven cabinet for communicating with the Wiring chamber, whereby the said draft inducing means creates a negative press-ure in the air chamber downstream of the draft inducing means, while the air pressure in the wiring chamber functions at about atmospheric pressure so there is substantially no air movement in the wiring chamber that is caused by the said draft inducing means.
  • a domestic oven comprising oven liner walls forming an oven cavity Where one wall of the cavity includes a door for gaining access thereto, heating means in heat transfer relation with the oven cavity for cooking foods placed therein, thermal insulating means surrounding the oven liner, an outer oven cabinet surrounding the insulated oven liner and spaced outwardly therefrom to form a cooling air chamber therebetween, the air chamber including in series relationship an air inlet opening, a blower means and an air outlet opening for circulating ambient air over the oven liner walls, oven components having portions extending through the back wall of the insulated over liner, Ia shroud located between the back wall of the insulated oven liner and the oven cabinet and encircling at least some of the said oven components to form a wiring chamber that is closed to the air chamber and has a substantially -dead air space -that is not subject to the drawing power of the said blower means.
  • a domestic ⁇ oven comprising oven liner Walls forming an oven cavity where one wall of the cavity includes a door for gaining access thereto, heating means in heat transfer relation with the oven cavity for cooking foods placed therein, thermal insulating lmaterial covering the oven liner walls, -a first oven cabinet surrounding the insulated oven liner walls, and a second oven cabinet surrounding the first oven cabinet but spaced outwardly therefrom to form an air space there between, air inlet means and air outlet means communicating with the air space, blower means located within the air space for creating a forced draft of room ai-r through the air space, a first group of holes formed in one wall of the oven liner and communicating with a second group of holes in the first oven cabinet for mounting oven components therethrough, and means for sealing the oven cavity from the air space, said second group of holes being surrounded by said sealing means comprising a continuous frame which extends between the first and second cabinet structures and surrounds the said second group of holes thereby forming a partial obstruction in the air space as Well ⁇ as creating a
  • a domestic oven comprising oven liner walls for-ming an oven cavity, where one wall of the cavity includes a door for gaining access thereto, heating means in heat transfer relation with the oven cavity for cooking foods placed therein, thermal insulating material covering the oven liner walls, an insulation guard surrounding the insulated oven liner Walls, and an outer oven cabinet surrounding the said insulation guard but spaced therefrom to forman air space therearound, and an air inlet and air outlet communicating with the air space, and a blower means within the air space so that relatively cool room air may circulate through the air space and dissipate some of the heat from the oven liner walls, oven components having portions extending through a back wall of the oven liner, and a single box-like shroud extending between the insulation guard and the outer oven cabinet and encircling at least some of the said component portions for isolating the said component portions from the air space.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electric Stoves And Ranges (AREA)
  • Baking, Grill, Roasting (AREA)
  • Electric Ovens (AREA)
US436615A 1965-03-02 1965-03-02 Domestic oven with smoke leakage prevention Expired - Lifetime US3331942A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US436615A US3331942A (en) 1965-03-02 1965-03-02 Domestic oven with smoke leakage prevention
GB8819/66A GB1131016A (en) 1965-03-02 1966-03-01 Improvements in domestic oven with smoke leakage prevention
NL6602693A NL6602693A (https=) 1965-03-02 1966-03-02
DE1966G0046201 DE1579664B2 (de) 1965-03-02 1966-03-02 Haushaltsherd

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US436615A US3331942A (en) 1965-03-02 1965-03-02 Domestic oven with smoke leakage prevention

Publications (1)

Publication Number Publication Date
US3331942A true US3331942A (en) 1967-07-18

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Application Number Title Priority Date Filing Date
US436615A Expired - Lifetime US3331942A (en) 1965-03-02 1965-03-02 Domestic oven with smoke leakage prevention

Country Status (4)

Country Link
US (1) US3331942A (https=)
DE (1) DE1579664B2 (https=)
GB (1) GB1131016A (https=)
NL (1) NL6602693A (https=)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889100A (en) * 1974-07-31 1975-06-10 Gen Electric Oven ventilating system
US3889099A (en) * 1974-07-31 1975-06-10 Gen Electric Door cooling system
US20070158327A1 (en) * 2006-01-08 2007-07-12 Whirlpool Corporation Warming Drawer
US20120033406A1 (en) * 2009-04-30 2012-02-09 Electrolux Home Products Corporation N.V. Oven, especially domestic oven
US20150323194A1 (en) * 2014-05-09 2015-11-12 Bsh Home Appliances Corporation Home cooking appliance having a rear exhaust louver
US20160209051A1 (en) * 2015-01-16 2016-07-21 Lg Electronics Inc. Cooking appliance
US20230135267A1 (en) * 2021-10-28 2023-05-04 Haier Us Appliance Solutions, Inc. Mesh screen to prevent access to hot surfaces within an oven appliance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2620521A1 (fr) * 1987-09-15 1989-03-17 Licentia Gmbh Moufle de four a cuire et a rotir

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756319A (en) * 1953-10-29 1956-07-24 Hatch Gordon Radiant heating unit and oven
US3036193A (en) * 1959-10-14 1962-05-22 Gen Motors Corp Removable oven liner
US3121158A (en) * 1962-12-13 1964-02-11 Gen Electric Household cooking ovens and methods of cleaning the same
US3211892A (en) * 1961-10-09 1965-10-12 Auto Bake Inc Industrial radiant heating oven

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756319A (en) * 1953-10-29 1956-07-24 Hatch Gordon Radiant heating unit and oven
US3036193A (en) * 1959-10-14 1962-05-22 Gen Motors Corp Removable oven liner
US3211892A (en) * 1961-10-09 1965-10-12 Auto Bake Inc Industrial radiant heating oven
US3121158A (en) * 1962-12-13 1964-02-11 Gen Electric Household cooking ovens and methods of cleaning the same

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889100A (en) * 1974-07-31 1975-06-10 Gen Electric Oven ventilating system
US3889099A (en) * 1974-07-31 1975-06-10 Gen Electric Door cooling system
US20070158327A1 (en) * 2006-01-08 2007-07-12 Whirlpool Corporation Warming Drawer
US7619182B2 (en) * 2006-01-08 2009-11-17 Whirlpool Corporation Warming drawer
US20120033406A1 (en) * 2009-04-30 2012-02-09 Electrolux Home Products Corporation N.V. Oven, especially domestic oven
US20150323194A1 (en) * 2014-05-09 2015-11-12 Bsh Home Appliances Corporation Home cooking appliance having a rear exhaust louver
US10119706B2 (en) * 2014-05-09 2018-11-06 Bsh Home Appliances Corporation Home cooking appliance having a rear exhaust louver
US20160209051A1 (en) * 2015-01-16 2016-07-21 Lg Electronics Inc. Cooking appliance
US10371392B2 (en) * 2015-01-16 2019-08-06 Lg Electronics Inc. Cooking appliance
US20230135267A1 (en) * 2021-10-28 2023-05-04 Haier Us Appliance Solutions, Inc. Mesh screen to prevent access to hot surfaces within an oven appliance
US12359825B2 (en) * 2021-10-28 2025-07-15 Haier Us Appliance Solutions, Inc. Mesh screen to prevent access to hot surfaces within an oven appliance

Also Published As

Publication number Publication date
NL6602693A (https=) 1966-09-05
DE1579664A1 (de) 1970-08-13
DE1579664B2 (de) 1976-07-29
GB1131016A (en) 1968-10-16

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