US3633561A - Built-in self-cleaning wall oven - Google Patents

Built-in self-cleaning wall oven Download PDF

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Publication number
US3633561A
US3633561A US362A US3633561DA US3633561A US 3633561 A US3633561 A US 3633561A US 362 A US362 A US 362A US 3633561D A US3633561D A US 3633561DA US 3633561 A US3633561 A US 3633561A
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United States
Prior art keywords
oven
wall
air
passages
duct
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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
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US362A
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English (en)
Inventor
Eugene J Barnett
Gerald E Baker
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CBS Corp
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Westinghouse Electric Corp
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Publication date
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Publication of US3633561A publication Critical patent/US3633561A/en
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    • 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
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • 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

Definitions

  • the oven structure shown in the patent is taught as including airflow inducing means (i.e., blower means) to ensure circulation of air in passages formed around most sides of the oven cavity and then direct the air over a vent duct which carries oven gases from the catalytic oxidation unit to the room in which the oven is situated.
  • airflow inducing means i.e., blower means
  • a construction according to our invention is also compatible with the apparatus and method of self-cleaning taught in US. Kastovich application Ser. No. 552,663, now U.S. Pat. No. 3,504,161, and with the control systems and oven door latch and lock arrangements disclosed in US. Pat. Nos. 3,387,874, 3,390,909, and 3,410,988.
  • a built-in, self-cleaning wall oven includes an insulated oven liner forming an oven cavity having an open front adapted to be closed by a door, air passages formed by panels spaced outwardly from the insulated liner along at least the top, rear and opposite sides of the cavity, the passages all being in open communication with each other, an air inlet across substantially the entire front width of the oven and below the oven to admit room air to the passages, a control and wiring chamber overlying the top air passage and having a control panel forming the front wall of the chamber, this control chamber being thermally and airflow isolated from the passages, an air outlet opening for the passages at the front of the top air passage, the air outlet opening being located between the control panel and the top of the door, an oven gas vent duct having an inlet communicating with the oven cavity and extending for at least half the depth of the oven in the top air passage to place the duct in open heat transfer relation with the air passing through the top air passage, the duct having a discharge
  • the bottom wall of the top air passage is formed by a metallic panel overlying the thennal insulation on the top of the oven cavity and the vent duct is secured to the metallic panel in a relatively good heat conducting relation to promote the transfer of heat from the exhaust duct to the metallic panel so that the flow over the entire area of the panel aids in picking up heat from the exhaust duct.
  • FIG. 1 is a partly broken and partly schematic isometric view of a built-in, self-cleaning oven incorporating the inven- LII tion, this view being intended to serve as an aid in understanding the overall airflow system;
  • FIG. 2 is a right side elevational view, partly broken and partly in section, and also showing the relative location of the front wall ofa cabinet in which the oven is installed.
  • the oven cavity 10 is generally defined by a box-shaped oven liner 12 provided with an open front 14 adapted to be closed by the insulated front door 16, all five sides of the oven liner are surrounded by thermal insulation l8 as is conventional in the pyrolytic type self-cleaning ovens.
  • Wall means spaced outwardly from the insulated oven cavity are provided along at least the top, rear, and opposite sidewalls to define airflow passages which are in open communication with each other.
  • the inner faces of the air passages are defined by metal panels which also serve to hold the blankets of thermal insulation 18 in place.
  • the side inner wall panel is designated 20, the top inner wall panel 22, the rear inner wall panel 24, the side outer wall panel 26, the top outer wall panel 28, and the rear outer wall panel 30.
  • the side air passage is designated 32, the top air passage 34, and the rear air passage 36.
  • the side opposite from that shown in FIGS. 1 and 2 is a mirror image from a constructional standpoint and accordingly provides a side air passage identical to the side air passage 32.
  • FIGS. 1 and 2 The paths that the airflow follows is indicated by the arrows in FIGS. 1 and 2.
  • the oven as a whole is so set in a rectangular opening the cabinet 38 (FIG. 2) that a gap forming an air inlet 40 is defined across substantially the entire front width of the oven below the door to admit room air to the space below the oven.
  • a relatively shallow bottom channel 42 which is open at the front and the rear ends thereof and has a width nearly as great as the width of the oven isolates the bottom inner panel 44 from wood cabinet structure therebelow and also insures the provision of an air passage for air to pass below the exterior face of the panel 44.
  • the air which enters through the gap 40 flows along the entire width of the bottom, part of it through the channel and part of it around the channel 42.
  • An openwork grill 56 is provided at the opening.
  • the air flow system as a whole is designed that room air will be admitted below the oven and flow along the bottom to the sides and the rear, and then upwardly along these opposite side and rear passages, and then forwardly through the top air passage to the outlet opening at the front.
  • the bottom channel 42 is desirable for the single wall oven, where a double-oven of the type having a self-cleaning wall oven mounted on top of an ordinary cooking oven is involved, the bottom channel 42 is obviously not necessary.
  • the airgap 40 is still provided at the bottom front edge of the lower oven and the air flows upwardly along the sides and rear of the bottom non-self-cleaning oven in less-confined paths and then flows through the already described passages of the upper selfcleaning oven.
  • the oven cavity 10 includes the usual heating elements such as the heating element 58 at the top of the oven cavity.
  • the element is mounted immediately below a plenum structure 60 provided with apertures therein in the same array as the array of the element so that the gases produced during a cleaning cycle are constrained to pass closely by the element and into the plenum in leaving the oven cavity during a heat cleaning cycle.
  • the gases are then directed through a vertical conduit 62 which extends through the insulation located between the upper wall of the inner liner and the lower wall 22 of the top air passage.
  • the conduit 62 is located more closely to the rear of the oven than to the front so that the vent duct 64 which receives the gases from the conduit 62 carries them a substantial distance to the forward end and outlet 66 of the vent duct.
  • the duct may take the general form of a downwardly open channel having edge flanges 68 secured directly, as by spot welding, to the face of the top inner panel 22 so that the duct is in excellent heat conducting relation with the inner panel 22.
  • the inner panel 22, to which the duct is secured in good heat conducting relation forms the bottom of the top air passage 34 and there is provided a substantial surface area of duct in open heat transfer relation with the air passing through the top air passage.
  • the long vent duct path results in the hottest part of the duct being located at a point where the convection airflow passing thereover is cooler than if the duct started near the front part of the oven. It will also be appreciated that by placing the vent duct in good heat conducting relation with the inner panel 22, heat is conducted from the exhaust duct out over an extended surface area of the panel 22 for being swept by the air passing forwardly through the top air passage 34.
  • the temperature of the air exiting from the oven cavity during a cycling portion of the heat cleaning operation is in the order of about 1,000 to L050 F.
  • the temperature of this gas is reduced substantially by the time it is exhausted from the opening 66 at the forward end of the vent duct 64 by virtue of the relatively cooler convection air passing over the duct so as to cool the vent gases passing through the duct.
  • a control and wiring chamber 70 is provided in overlying relation to the top air passage 34.
  • the forward face of the chamber is provided with a control panel 72 for carrying the usual control knobs, clocks and the like typically provided with such ovens.
  • the open-work grill 56 serving as the vent trim is made as a separate piece from the control panel frame 74 so that they may be mounted in spaced-apart relation with an airgap therebetwe en to prevent conductive heat flow between the separate pieces. This also permits the vent trim 56 to be separately moved for making adjustments on forward portions of the latch-lock arrangement which are located near the forward end of the top air passage 34.
  • a separate blanket of thermal insulation such as fiber glass 76 is placed upon the outer face of the top outer panel 28. It will be noted from FIG. 2 that the top outer panel 28 has a rear edge 78 which terminates short of the rearmost wall 30 so that a gap 80 is provided therebetween.
  • the blanket of fiber glass or comparable thermal insulation 76 extends rearwardly to the rear wall 30 to provide a flexible type of seal through which the bundles of control wires 82 can pass.
  • the control wires 82 of course connect the various operable controls at the front panel 72 with other electrical components located in the rear air passage 36.
  • the top wall of the control and wiring chamber 70 is formed by a top panel 84.
  • This panel and the rear outer wall 30 are, in the currently preferred version of an oven incorporating our invention, of a high emissivity such as so-called black beauty steel, for the purpose of absorbing and radiating heat to a greater degree than the heat is reflected.
  • the inner wall panels 20, 22 and 24, forming the inner walls of the air passages are of aluminum-coated steel
  • the outer sidewalls 26 are of galvanized steel.
  • the aluminum-coated steel and galvanized steel of course provide a substantially greater degree of reflectivity of heat than the dark-colored panels 84 and 30 at the top and rear of the oven. The reasons for using panels of different heat reflectivity may be understood better from the following.
  • the top wall 84 and the rear wall 30 are spaced a substantially greater distance from the oven cavity than the other panels and accordingly are typically cooler than the panels forming the sidewalls of the side passages which latter passages are relatively narrow.
  • the darker top panel 84 and the rear panel 30 may be used to absorb and transmit heat to the cooler areas adjacent thereto, while the light-colored panels with low emissivity are used to reflect heat back towards its source.
  • the object of the black panels is to lower the clock motor tempera ture located in switch compartment and the solenoid and 1- hour timer motor temperatures located in the back air passage. This is to use standard parts. Higher temperature resistance coil and solenoid insulation could be used to solve the problem in an alternate way.
  • the provision of the air passages in open communication with each other, the isolation thermally and from an airflow standpoint of the control and wiring chamber from the air passages, the provision of the relatively lengthy vent duct in the top air passage, and with the exhaust duct being in good heat conducting relation to the lower wall of the top air passage, all contribute substantially to the performance of the cooling system according to the invention.
  • a distinct advantage provided by the use of a free convection cooling system is that the omission of a fan also results in the omission of any bafiles or restricted area openings in which the fan operates, so that there is no problem of fan failure and blockage by fans and baffles if there is a fan failure.
  • a built-in wall oven of the pyrolytic self-cleaning type including:
  • an oven liner forming an oven cavity having an open front
  • thermal insulation surrounding said liner on the top, bottom, rear and opposite sides thereof; wall means spaced outwardly from said insulation along at least the top, rear and opposite ones of said sides to define airflow passages in open communication with each other;
  • control and wiring chamber overlying said top air passage and having a control panel forming the front wall of said chamber
  • an oven exhaust gas duct having an inlet communicating with said oven cavity and extending for at least half the depth of the oven in said top air passage to place said duct in open heat transfer relation with the air passing through said top air passage, said duct having a discharge opening between said top of said door and said control panel;
  • said airflow passages being devoid of air flow inducing means therein whereby the airflow through said passages results from free convection of room air in accordance with the emission of heat from said oven.
  • said thermal insulation overlying said top wall of said top passage extends to said rear wall means to provide a flexible seal through which wiring can pass through said gap.
  • a built-in wall oven of the pyrolytic self-cleaning type including:
  • an oven liner forming an oven cavity having an open front
  • wall means space outwardly from said insulation along at least the top, rear and opposite ones of said sides to define airflow passages in open communication with each other;
  • control and wiring chamber overlying said top air passage and having a control panel forming the front wall of said chamber
  • an oven exhaust gas duct having an inlet communicating with said oven cavity and extending for at least half the depth of the oven in said top air passage to place said duct in open heat transfer relation with the air passing through said top air passage, said duct having a discharge opening between said top of said door and said control panel;
  • a top wall for said control chamber having a relatively high emissivity for promoting the absorption and radiation of heat from said top wall;
  • said wall means forming the outer walls of said side passages are of a relatively low emissivity for promoting the reflection of heat back towards said oven;
  • said airflow passages being devoid of airflow inducing means therein whereby the airflow through said passages resulting from free convection of room air in accordance with the emission of heat from said oven.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electric Stoves And Ranges (AREA)
  • Processing Of Solid Wastes (AREA)
US362A 1970-01-02 1970-01-02 Built-in self-cleaning wall oven Expired - Lifetime US3633561A (en)

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US36270A 1970-01-02 1970-01-02

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ES (1) ES194479Y (es)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851820A (en) * 1974-02-28 1974-12-03 T Hudson Spray gun for producing a fan-like pattern
US3882843A (en) * 1974-06-24 1975-05-13 Westinghouse Electric Corp Self-cleaning wall oven with air flow system
US3921617A (en) * 1971-08-26 1975-11-25 Hugh M Rumbaugh Kitchen appliance for cooking food
US3924601A (en) * 1974-11-04 1975-12-09 Gen Electric Wall oven exhaust duct system
US4327274A (en) * 1978-08-21 1982-04-27 General Electric Company Ventilation system for combination microwave oven and exhaust vent
US4539469A (en) * 1984-04-16 1985-09-03 Lincoln Manufacturing Company, Inc. Oven control circuitry cooling system for a double-stack food preparation oven arrangement
US4591645A (en) * 1983-08-27 1986-05-27 Rhein-Chemie Rheinau Gmbh Process for the production of 2-(hydrocarbyldithio)-5-mercapto-1,3,4-thiadiazoles
US4616562A (en) * 1985-06-21 1986-10-14 Kuechler Irvin R Ventilation system for pizza ovens
GB2190486A (en) * 1986-05-17 1987-11-18 Edward Rose Air flow insulated ovens
US4848311A (en) * 1988-03-11 1989-07-18 General Electric Company Method and apparatus for reducing side panel hot spots in a kitchen range
US6172338B1 (en) * 1999-10-05 2001-01-09 Maytag Corporation Cooling system for a cooking appliance
US20040115583A1 (en) * 2002-12-11 2004-06-17 Hohenshelt John S. Portable kiln
US6761159B1 (en) 2003-03-12 2004-07-13 Maytag Corporation Exhaust cooling system for a cooking appliance
US20060201493A1 (en) * 2005-03-01 2006-09-14 Chacko Jacob T Range design for surface temperature control
US20100258549A1 (en) * 2009-04-10 2010-10-14 Koninklijke Fabriek Inventum B.V. Oven with External Cooling, and Use Thereof
US20110209626A1 (en) * 2009-09-01 2011-09-01 Manitowoc Foodservice Companies, Llc Method and Apparatus for Cooling a User Interface and/or Door of a Cooking Device
US20120152224A1 (en) * 2010-12-15 2012-06-21 General Electric Company Venting system for cooking appliance
US20130008427A1 (en) * 2011-01-13 2013-01-10 W.C. Bradley Co. Outdoor cooker and lid therefor
US10066839B2 (en) 2014-07-23 2018-09-04 Samsung Electronics Co., Ltd. Oven
US20180340694A1 (en) * 2017-05-26 2018-11-29 Electrolux Home Products, Inc. Balanced cooling duct for cooking oven

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921617A (en) * 1971-08-26 1975-11-25 Hugh M Rumbaugh Kitchen appliance for cooking food
US3851820A (en) * 1974-02-28 1974-12-03 T Hudson Spray gun for producing a fan-like pattern
US3882843A (en) * 1974-06-24 1975-05-13 Westinghouse Electric Corp Self-cleaning wall oven with air flow system
US3924601A (en) * 1974-11-04 1975-12-09 Gen Electric Wall oven exhaust duct system
US4327274A (en) * 1978-08-21 1982-04-27 General Electric Company Ventilation system for combination microwave oven and exhaust vent
US4591645A (en) * 1983-08-27 1986-05-27 Rhein-Chemie Rheinau Gmbh Process for the production of 2-(hydrocarbyldithio)-5-mercapto-1,3,4-thiadiazoles
US4539469A (en) * 1984-04-16 1985-09-03 Lincoln Manufacturing Company, Inc. Oven control circuitry cooling system for a double-stack food preparation oven arrangement
US4616562A (en) * 1985-06-21 1986-10-14 Kuechler Irvin R Ventilation system for pizza ovens
GB2190486A (en) * 1986-05-17 1987-11-18 Edward Rose Air flow insulated ovens
US4848311A (en) * 1988-03-11 1989-07-18 General Electric Company Method and apparatus for reducing side panel hot spots in a kitchen range
US6172338B1 (en) * 1999-10-05 2001-01-09 Maytag Corporation Cooling system for a cooking appliance
US7458809B2 (en) * 2002-12-11 2008-12-02 Jsh Management, Inc. Portable kiln
US20040115583A1 (en) * 2002-12-11 2004-06-17 Hohenshelt John S. Portable kiln
US6761159B1 (en) 2003-03-12 2004-07-13 Maytag Corporation Exhaust cooling system for a cooking appliance
US20060201493A1 (en) * 2005-03-01 2006-09-14 Chacko Jacob T Range design for surface temperature control
US7814896B2 (en) 2005-03-01 2010-10-19 Owens Corning Intellectual Capital, Llc Range design for surface temperature control
US20100258549A1 (en) * 2009-04-10 2010-10-14 Koninklijke Fabriek Inventum B.V. Oven with External Cooling, and Use Thereof
US8502117B2 (en) * 2009-04-10 2013-08-06 Leonard Emanuel Cusell Oven with external cooling, and use thereof
US20110209626A1 (en) * 2009-09-01 2011-09-01 Manitowoc Foodservice Companies, Llc Method and Apparatus for Cooling a User Interface and/or Door of a Cooking Device
US9686825B2 (en) * 2009-09-01 2017-06-20 Manitowoc Foodservice Uk Limited Method and apparatus for cooling a user interface and/or door of a cooking device
US20120152224A1 (en) * 2010-12-15 2012-06-21 General Electric Company Venting system for cooking appliance
US20130008427A1 (en) * 2011-01-13 2013-01-10 W.C. Bradley Co. Outdoor cooker and lid therefor
US8662068B2 (en) * 2011-01-13 2014-03-04 W.C. Bradley Co. Outdoor cooker and lid therefor
US10066839B2 (en) 2014-07-23 2018-09-04 Samsung Electronics Co., Ltd. Oven
US20180340694A1 (en) * 2017-05-26 2018-11-29 Electrolux Home Products, Inc. Balanced cooling duct for cooking oven
US10495318B2 (en) * 2017-05-26 2019-12-03 Electrolux Home Products, Inc. Balanced cooling duct for cooking oven

Also Published As

Publication number Publication date
CA925142A (en) 1973-04-24
ES194479Y (es) 1975-04-16
ES194479U (es) 1974-12-16

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