US3707145A - Self-cleaning oven - Google Patents

Self-cleaning oven Download PDF

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Publication number
US3707145A
US3707145A US98694A US3707145DA US3707145A US 3707145 A US3707145 A US 3707145A US 98694 A US98694 A US 98694A US 3707145D A US3707145D A US 3707145DA US 3707145 A US3707145 A US 3707145A
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US
United States
Prior art keywords
self
oven
door
front door
air
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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
Application number
US98694A
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English (en)
Inventor
Richard J Anetsberger
John A Anetsberger
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Anetsberger Brothers Inc
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Anetsberger Brothers Inc
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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
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • 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
    • F24C14/025—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning pyrolytic type for gaseous fuels

Definitions

  • blower means comprising an inner fan disposed interiorly of the oven for circulating heated air therein, an outer fan in the rear air passage, and a motor exteriorly of the oven mounted coaxially with the fans, with shroud means spaced from the motor to insure movement through and around the motor of outside air drawn inwardly by the outer fan and blow thereby over the control and front door means for cooling purposes, plate and spacer means interconnecting the two fans to prevent direct transfer of heat from the inner fan to the motor, improved from door 1 operating mechanism, and temperature-responsive door locking means automatically operable during a cleaning cycle.
  • Self-cleaning ovens which employ inner and outer walls spaced from each other in insulating relationship and control means for selectively maintaining the ovens at desired cooking temperatures, as from 150 to 550 F., and cleaning temperatures between 750 and 950 F.,-and include blower or fan means interiorly-of the oven for circulating the heated air therein. And coaxially mounted fans driven'by a single motor are shown in US. Pat. No. 3,437,085, but the outer fan therein is used to supply primary and secondary air for the gas burner means employed.
  • a primary difficulty with such self-cleaning ovens is that the control means, the fan motor and the front door means are seriously adversely affected by the excessive heat generated during a cleaning cycle. And where interengaging front doors are employed, difficulties are encountered therewith during a cleaning cycle.
  • This invention provides means in a self-cleaning oven for effectively cooling the front door means, control means and motor, which is of particular importance during a cleaning cycle and materially increases the life of the motor and control means.
  • These novel results are accomplished by placing cool air ducts in the rear, bottom and side wall spaces of the oven terminating adjacent the bottom of the front door means and with apertures communicating with the side wall spaces, mounting the control means in one of the latter, and providing an outer cooling air circulating fan coaxial with the usual inner fan and disposed in the rear wall space and connected to the fan motor which is mounted exteriorly of the oven, with a shroud spaced from the motor to require cooling air drawn in by that outer fan to pass over the motor, and an imperforate plate mounted on the outer end of the inner fan to drivingly support the inner fan on the outer fan while preventing direct heat transmission from the inner fan to the motor shaft.
  • Novel front door means also are provided which overcome operating difficulties due to the extreme heat during a cleaning cycle and are automatically locked closed when the oven temperature is higher than normal maximum
  • FIG. 1 is a perspective view of an oven embodying the features of the invention
  • FIG. 2 is an end elevational view, as seen from the right side of FIG. 1;
  • FIG. 3 is a detail vertical section through the blower means
  • FIG. 4 is a horizontal sectional view taken substantially on the line 44 of FIG. 1;
  • FIG. 5 is a vertical section taken substantially on the line 5-5 of FIG. 2;
  • FIG. 6 is a detail perspective view of the lower front portion of the oven with the door operating and locking means exposed;
  • FIG. 7 is a detail horizontal section taken substantially on the line 7-7 of FIG. 6;
  • FIG. 8 is a detail horizontal section taken substantially on the line 88 of FIG. 6.
  • the oven 11 is provided with a hollow vertically extending column 25 within which the usual several control means 26 are mounted with their manually operable elements extending forwardly through suitable apertures in the column for convenient actuation by an operator.
  • the bottom of this column 25 andthe adjacent portion of the right-hand duct 23 are provided with a plurality of interconnecting apertures 27 (FIGS. 2 and 4), and the column 25 similarly communicates at its upper end with the space between the top walls 12 and 13.
  • the front end of the right-hand duct 23 has an inwardly directed extension for communication with the open bottom portion of the manifold 22.
  • the outer rear wall 16 is provided with air outlet means in the form of apertures 28 (FIG. 1) at the uPPer corner portions thereof.
  • the outer bottom wall structure 18 is provided with angularly disposed baffles or deflector portions 29 extending from front to rear of the oven for protecting the the side cool air ducts 23 from heat from the burner means 30 and deflecting heat rays from the latter upwardly against the inner bottom wall 19.
  • the burner means 30 is disposed in well-known manner in the bottom space between the walls 18 and 19, and it will be understood that either gas or electricity may be used as the energy source. 1
  • Blower means are mounted at the rear of the oven 1 1 for the dual purpose of circulating heated air within the oven proper, as defined by the inner walls 13, 15, 17 and 19 and the front door means 21, and forcing cooling air from the outside, over the motor employed, through the wall spaces, and particularly over the control means 26 and the outer surfaces of the door means 21.
  • this blower means 31 may be secured in position in a suitable aperture in the inner rear wall 17 by means of a mounting plate 32 and nuts and bolts 33.
  • An air duct 34 the upper portion of which is substantially cylindrical, has its inner wall secured by suitable nuts and bolts 35 to the mounting plate 32, with a gasket of appropriate insulating material 36 disposed therebetween.
  • the rear wall of this air duct 34 has a circular inlet aperture 37, and a motor 38 is secured to the air duct by means of suitable bolts and nuts 39 spaced around and adjacent to the periphery of the aperture 37 and having spacing washers 41 thereon to substantially align the motor base with the outer rear wall 16, the latter being provided with an air inlet aperture 42 surrounding and spaced from the motor base.
  • a cooling fan 44 which is disposed within the cylindrical portion of the air duct 34.
  • An imperforate circular plate 45 is secured to the inner end of the cooling fan 44 by bolt and nut means 46 and spacers 47, and mounted upon the inner surface of the plate 45, PF ferably by the bolt and nut'means 46, is an inner fan 48 which is coaxial with the cooling fan 44. It will be noted from HO. 3
  • imperforate plate 45 substantially fills the apertures 49 which coincide with each other and extend through the mounting plate 32, insulating gasket 36 and inner wall of the air duct 34.
  • a shroud means in the form of a cylindrical casing 51 is mounted in any suitable manner on the outer rear wall 16 surrounding the inlet aperture 42, being provided in its outer wall with a circular air inlet aperture 52. Air drawnin through this aperture 52 by the cooling fan 44 will pass over the motor 38 and into the air duct 34 through its inlet aperture 37.
  • the air duct 34 has a discharge outlet 53 (FIG.
  • Cooling air drawn in over the motor 38 by the fan 44 thus will be directed from the lower ends of the duct extension 54 into the side ducts 23, the side wall spaces through the apertures 24, and the control column 25 through the apertures 27. Some of this cooling air also will be directed into the manifold 22 and upwardly over the front surfaces of the door means 21, while part of it will effectively dissipate heat from the several control means 26, and that portion of the cooling air not directed over the front doors will be discharged rearwardly from the oven through the apertures 28.
  • the net result is the accomplishment of the objectives initially noted herein to make practical the self-cleaning of the oven by means of temperatures between 750 and 950 F. by effectively cooling the exterior of the oven and, most importantly, the control means 26 and the motor 38.
  • the novel mounting of the inner fan 48 by means of the imperforate plate 45 and spacers 47 performs the function of preventing direct transfer of heat to the shaft of motor 38. This is particularly important.
  • the shroud 51 also helps to insure normal life for the motor despite frequent high temperature oven self-cleaning operations.
  • the front door means for the oven 11, as previously noted, comprises a pair of doors 21 interengaging with each other in the usual manner, as by means of a sealing edge flange at the rear and along the inner edge of the right-hand door, and manual means are provided for opening and closing the doors which include a han die 56 secured to and extending forwardly from the inner portion of the left-hand door 21.
  • Each door 21 is mounted for swinging movement by means of a pintle S7 vertically disposed adjacent its outer edge which is rotatably supported in any suitable manner.
  • a sprocket wheel 58 is mounted on each of the pintles 57 adjacent the lower ends thereof and a chain segment 59 passes around and engages each of the sprockets 58 (FIG. 6).
  • the forward portion of the left-hand chain segment 59 is connected to the rear portion of the right-hand chain segment 59 by means of an adjustable solid linkage comprising an outer link 61 and an inner link 62 adjustably interconnected by suitable bolt means 63 (H6. 7).
  • a plate or bracket 64 is secured in any suitable manner at its upper end to the inner link 62, with the lower end of that bracket connected to the frame of the oven by a spring 65 (P16. 6).
  • the forward end of the right-hand chain segment 59 likewise is connected to the rear end of the left-hand segment 59 by a similar adjustable solid linkage 61-63 which also includes a depending bracket 64 and a spring 65 connecting the lower end of that plate to the frame of the oven.
  • Means also are provided as part of such door swinging means for releasably maintaining the doors in selectively adjusted positions, i.e., fully closed, partially opened or fully opened.
  • This means comprises a cam disc 66 mounted upon and secured to the lower end portion of the pintle 57 of the left-hand door 21 below the sprocket 58. As shown in FIG. 8, this cam disc is provided with three peripherally spaced notches 67, 68 and 69.
  • a vertically extending pin or roller 71 on the forward end of a cam follower lever 72 cooperates with the edge notches in the cam disc 66.
  • the lever 72 is pivotally mounted in any suitable manner at its inner end at 73 to the frame of the oven (FIG. 6) and a spring 74 is connected at its inner end in any desired manner to the oven and at its outer end to the forward portion of the lever 72 to resiliently and releasably maintain the pin or roller '71 in edge engagement with the cam disc 66.
  • this cam follower pin 71 is held against the forward surface of the notch'67 to maintain the doors in closed position.
  • the notch 67 is so shaped as to cooperate with the pin 71 under the acl060 l 2 MR6 tion of the spring 74 to cammingly complete a door closing operation when the doors have been moved close to a closed position. Swinging of the doors 21 outwardly to a partially open position in which they extend substantially parallel to the sides of the oven will result in the cam disc 66 being rotated to dispose its notch 68 in alignment with the pin 71. The spring 74 and cam follower 71, 72 thus will function to releasably maintain the doors in that partially opened position. Likewise, further swinging of the doors 21 to fully opened position will align the third notch 69 of the cam disc 66 with the pin 71 to releasably maintain the doors in that selected position.
  • Means also are provided for automatically locking the doors 21 in closed position during a self-cleaning cycle of operations.
  • This means comprises a normally inoperative keeper or door lock 75 (FIG. 6) pivotally mounted on the oven frame intermediate its ends with its upper end adapted to be swung into operative engagement with a suitable pin 76 depending from the left-hand door 21 to prevent opening thereof. That lower end of the keeper 75 is connected by a link 77 to a bell crank 78 pivoted on the oven frame, which in turn is connected to the vertically disposed armature of a solenoid 79. When the latter is energized, the link 77 is pulled to the right in FIG. 6 to swing the upper end of the keeper 75 into operative position in engagement with the pin 76.
  • the doors 21 thus are locked in closed position whenever the solenoid 79 is energized.
  • a spring 81 (FIG. 2) connected to the bell crank 78 adjacent the connection thereof with the link 77 and on the opposite side of the bell crank pivot from the point of attachment of the solenoid armature returns the latter and the link 77 and keeper 75 to normal inoperative position, as shown in FIG. 6.
  • An oven cleaning control which comprises one of the control means 26 causes energization of the solenoid 79 when it is actuated manually to initiate a cleaning operation.
  • the locking of the oven doors 21 in closed position thus is effected and they are maintained locked throughout a cleaning operation.
  • a'high temperature thermostat 82 (FIG. 2) which is mounted interiorly of the oven in well-known manner automatically deenergizes the solenoid 79 when the oven temperature falls below 580 F. to permit the spring 81 to swing the keeper 75 back to its normal inoperative position of FIG. 6.
  • the doors 21 which normally can be swung open at any time will be locked closed whenever the temperature of the oven is above normal maximum cooking temperature.
  • a self-cleaning oven having a doublewalled construction of inner and outer top, bottom, rear and side walls defining interconnecting rear, bottom and side wall spaces, front door means, control means mounted in a side wall space, means for directing air into the latter said side wall space and to the lower exterior of said front door means from said bottom wall space, blower means comprising a cooling fan and rear duct means mounted in said rear wall space for drawing in ambient air and forcing the same forwardly through said bottom wall space and through said side wall spaces to direct cooling air upwardly over said front door means and said control means, and a motor for said fan mounted on said rear wall.
  • shroud means mounted on said outer rear wall for requiring air drawn in by said cooling fan to pass in close proximity to said motor.
  • blower means includes a second inner fan mounted coaxially with said cooling fan interiorly of the oven, and plate means mounted on adjacent ends of said fans and interconnected by peripherally spaced spacers to drivingly support said inner fan on said cooling fan and prevent direct transfer of heat from said inner fan to the shaft of said motor.
  • side air ducts mounted in the lower ends of said side wall spaces for directing cooling air from said rear air duct means over said front door means and having apertures in their upper walls for supplying cooling air to said side wall spaces and said control means.
  • burner means disposed between said inner and outer bottom walls, and deflector means extending laterally upwardly from and forming a part of said outer bottom wall for protecting said side air ducts from the heat generated by said burner means.
  • said front door means comprises a pair of interengaging doors mounted on vertical pintles and a handle attached to a first of one of said doors, means for swinging the second said door in response to swinging of said first door by aid handle, comprising sprockets mounted on the lower ends of the door pintles, chain means drivingly engaging said sprockets and including adjustable solid links, and a spring interconnected between said side walls and each of said solid links.
  • a cam disc mounted on the lower end of the pintle of said first door having peripherally spaced notches, and a cam follower resiliently urged into engagement with said notches to releasably maintain said doors in selectively adjusted positions.
  • one of said cam notches is so disposed as to function as a camming surface against which said cam follower exerts a door-closing force on the pintle of said first door.
  • a self-cleaning oven for said front door means, an oven cleaning control comprising one of said control means, and means operable by said oven cleaning control for moving said lock to operative position to prevent opening of said front door means whenever the temperature of said oven is above normal maximum cooking temperature
  • said door locking means comprises a keeper, spring means urging said keeper to an inoperative position, a solenoid having an armature connected to said keeper, and a high temperature ther-

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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)
  • Cleaning In General (AREA)
US98694A 1970-12-16 1970-12-16 Self-cleaning oven Expired - Lifetime US3707145A (en)

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US9869470A 1970-12-16 1970-12-16

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2207259A1 (en) * 1972-11-21 1974-06-14 Burger Eisenwerke Ag Built-in fan oven - having cooling jacket for oven outside and motor with ventilator on fan shaft
US3847134A (en) * 1973-03-01 1974-11-12 Tom S O Catering Equipment Ltd Ovens
FR2230942A1 (mo) * 1973-05-23 1974-12-20 Lca Corp
JPS5271967U (mo) * 1975-11-22 1977-05-28
US4089319A (en) * 1975-12-22 1978-05-16 Kazumi Tamada Hot blast type oven
US4549055A (en) * 1983-12-12 1985-10-22 Whirlpool Corporation Ventilating means for cooking apparatus
US6474702B1 (en) 2000-08-16 2002-11-05 France/Scott Fetzer Company Range door lock with nuisance latch
US20070039605A1 (en) * 2005-08-18 2007-02-22 Maytag Corp. Door linkage system for an oven having french-style doors
US20070246036A1 (en) * 2006-04-20 2007-10-25 Maytag Corp. French door cooking appliance closure system
US20100206289A1 (en) * 2005-08-18 2010-08-19 Whirlpool Corporation Door locking mechanism for an oven having french-style doors
EP2031310A3 (en) * 2007-07-24 2011-08-31 DragonAire Cooking Technologies, Inc. Systems and methods for heating food
US20130255657A1 (en) * 2012-03-29 2013-10-03 B/E Aerospace, Inc. Vehicle Oven Having Optimized Airflow
US20140283811A1 (en) * 2013-03-21 2014-09-25 General Electric Company Oven appliance with dual opening doors
US20150267921A1 (en) * 2014-03-20 2015-09-24 General Electric Company Mounting bracket with thermal maze to reduce heat transfer rate
US20160116171A1 (en) * 2014-10-22 2016-04-28 General Electric Company Oven airflow control
WO2016196669A1 (en) * 2015-06-01 2016-12-08 June Life, Inc. Thermal management system and method for a connected oven
CN113384166A (zh) * 2021-07-27 2021-09-14 珠海猛犸象科技有限公司 一种便于自清洁的烤箱
US11503940B2 (en) * 2017-05-17 2022-11-22 Lg Electronics Inc. Cooking appliance

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2923577A1 (de) * 1979-06-11 1980-12-18 Gaggenau Werke Backofen mit luftkuehlung
GB8421487D0 (en) * 1984-08-24 1984-09-26 Belling & Co Ltd Cookers
GB9109435D0 (en) * 1991-05-01 1991-06-26 Stoves Ltd Improvements in and relating to cookers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525614A (en) * 1947-06-21 1950-10-10 Cribben And Sexton Company Ventilated range
US3081392A (en) * 1955-02-24 1963-03-12 Tappan Co High-frequency oven
US3463138A (en) * 1968-04-29 1969-08-26 South Bend Range Corp Convection oven
US3512514A (en) * 1968-10-18 1970-05-19 Gen Electric Air cooling system for walls of self-cleaning oven
US3529582A (en) * 1968-12-09 1970-09-22 Gen Electric Self-cleaning forced convection oven

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525614A (en) * 1947-06-21 1950-10-10 Cribben And Sexton Company Ventilated range
US3081392A (en) * 1955-02-24 1963-03-12 Tappan Co High-frequency oven
US3463138A (en) * 1968-04-29 1969-08-26 South Bend Range Corp Convection oven
US3512514A (en) * 1968-10-18 1970-05-19 Gen Electric Air cooling system for walls of self-cleaning oven
US3529582A (en) * 1968-12-09 1970-09-22 Gen Electric Self-cleaning forced convection oven

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2207259A1 (en) * 1972-11-21 1974-06-14 Burger Eisenwerke Ag Built-in fan oven - having cooling jacket for oven outside and motor with ventilator on fan shaft
US3847134A (en) * 1973-03-01 1974-11-12 Tom S O Catering Equipment Ltd Ovens
FR2230942A1 (mo) * 1973-05-23 1974-12-20 Lca Corp
JPS5271967U (mo) * 1975-11-22 1977-05-28
US4089319A (en) * 1975-12-22 1978-05-16 Kazumi Tamada Hot blast type oven
US4549055A (en) * 1983-12-12 1985-10-22 Whirlpool Corporation Ventilating means for cooking apparatus
US6474702B1 (en) 2000-08-16 2002-11-05 France/Scott Fetzer Company Range door lock with nuisance latch
US8327835B2 (en) * 2005-08-18 2012-12-11 Whirlpool Corporation Door locking mechanism for an oven having french-style doors
US20100206289A1 (en) * 2005-08-18 2010-08-19 Whirlpool Corporation Door locking mechanism for an oven having french-style doors
US7814897B2 (en) 2005-08-18 2010-10-19 Maytag Corporation Door linkage system for an oven having french-style doors
US20070039605A1 (en) * 2005-08-18 2007-02-22 Maytag Corp. Door linkage system for an oven having french-style doors
US8336535B2 (en) 2006-04-20 2012-12-25 Whirlpool Corporation French door cooking appliance closure system
US20070246036A1 (en) * 2006-04-20 2007-10-25 Maytag Corp. French door cooking appliance closure system
EP2031310A3 (en) * 2007-07-24 2011-08-31 DragonAire Cooking Technologies, Inc. Systems and methods for heating food
US9618212B2 (en) * 2012-03-29 2017-04-11 B/E Aerospace, Inc. Vehicle oven having optimized airflow
US20130255657A1 (en) * 2012-03-29 2013-10-03 B/E Aerospace, Inc. Vehicle Oven Having Optimized Airflow
US20140283811A1 (en) * 2013-03-21 2014-09-25 General Electric Company Oven appliance with dual opening doors
US9255437B2 (en) * 2013-03-21 2016-02-09 General Electric Company Oven appliance with dual opening doors
US20150267921A1 (en) * 2014-03-20 2015-09-24 General Electric Company Mounting bracket with thermal maze to reduce heat transfer rate
US9551494B2 (en) * 2014-03-20 2017-01-24 Haier Us Appliance Solutions, Inc. Mounting bracket with thermal maze to reduce heat transfer rate
US20160116171A1 (en) * 2014-10-22 2016-04-28 General Electric Company Oven airflow control
WO2016196669A1 (en) * 2015-06-01 2016-12-08 June Life, Inc. Thermal management system and method for a connected oven
US11503940B2 (en) * 2017-05-17 2022-11-22 Lg Electronics Inc. Cooking appliance
CN113384166A (zh) * 2021-07-27 2021-09-14 珠海猛犸象科技有限公司 一种便于自清洁的烤箱

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Publication number Publication date
JPS4848672A (mo) 1973-07-10
JPS515469B2 (mo) 1976-02-20
CA934257A (en) 1973-09-25
GB1327366A (en) 1973-08-22

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