US3818171A - Microwave cooking apparatus - Google Patents
Microwave cooking apparatus Download PDFInfo
- Publication number
- US3818171A US3818171A US00257185A US25718572A US3818171A US 3818171 A US3818171 A US 3818171A US 00257185 A US00257185 A US 00257185A US 25718572 A US25718572 A US 25718572A US 3818171 A US3818171 A US 3818171A
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- US
- United States
- Prior art keywords
- microwave oven
- duct
- chamber
- cross
- air
- 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
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-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6426—Aspects relating to the exterior of the microwave heating apparatus, e.g. metal casing, power cord
- H05B6/6429—Aspects relating to mounting assemblies of wall-mounted microwave ovens
Definitions
- An eye-level microwave oven having a set of cooking burners disposed therebelow includes a ventilation duct extending vertically from a bottom chamber of the apparatus to the microwave oven. The duct may terminate at either the bottom or the back of the microwave oven.
- Some commercially available cooking apparatus includes a set of cooking burners which may be gas or electric burners, and an eye-level oven disposed thereabove.
- the eye-level oven is also operated typically by either gas or electricity.
- the conventional eye level oven is replaced by a microwave oven of approximately the same size, and disposed above the cooking burners of the apparatus.
- the microwave oven is powered by a magnetron, or the like.
- the magnetron may have a maximum allowable operating temperature on the order of 235 F, and thus if the magnetron of the microwave oven is not properly ventilated continuous operation of the oven is not possible when heat is being generated therebelow from the conventional cooking burners.
- the oven In a commercial microwave oven, there is generally no heat generated below the oven, and the oven is not normally confined in a small space.
- the eyelevel microwave oven which is primarily meant for use in a dwelling place, has heat generated therebelow and is also usually disposed against a wall.
- the usual ventilation techniques used in commercial microwave ovens do not provide adequate magnetron cooling in the eye-level microwave oven application.
- one important object of the present invention is to provide an improved microwave cooking apparatus including an eye-level microwave oven.
- a further'object of the present invention is to provide a microwave cooling apparatus in accordance with the preceding objects wherein a conventional eye-level oven can be used and easily adapted for microwave cooking.
- a cooking apparatus having a typical set of cooking burners which may be either gas or electric operated, and a microwave oven disposed above and spaced from the cooking burners.
- the cooking apparatus has an enclosed chamber at the bottom thereof, and there is provided a ventilation duct preferably vertically arranged, and extending from the bottom chamber of the apparatus to the microwave oven.
- the ventilating duct terminates at the bottom of the microwave oven and in an alternate embodiment the duct terminates into the back of the microwave oven.
- the duct has a rectangular cross section of a first area and the opening into the microwave oven is dimensioned having a second area,
- FIG. 2 is a side view of the apparatus of FIG. 1 partially in cross section showing one embodiment for the ventilation duct;
- FIG. 3 is a back view of the cooking apparatus of FIG. 1;
- FIG. 5 is a side view similar to the one shown in FIG. 2 partially in cross section of another embodiment of the ventilation duct of the present invention.
- the microwave oven preferably has an insulating sheet 22 disposed therebelow to provide a limited amount of insulation between the heat generated from the burners l4 and the microwave oven itself.
- the range 10 is typically constructed as depicted in the cutaway section in FIG. 1, with the side walls 24 extending rearwardly to form a back cavity 26 (see also FIG. 3).
- the bottom portion 18 is also constructed so that there is an open bottom chamber 28 that forms an enclosed chamber when the range is supported on a floor or the like. This bottom chamber 28 is vented at the front vent 30.
- FIGS. 2 and 3 there is shown respective side and back views of the cooking range indicating the position for the vertical ventilating duct 32.
- Duct 32 connects from the bottom chamber 28 through an opening 34 in the back wall 36 defining the chamber 28.
- the bottom chamber 28 is a source of relatively cool input air coupled from input vent and the vertical duct 32 carries this relatively cool air to the microwave oven 12.
- the blower 60 may be of conventional design and includes a circulating fan 66 having an input port 68.
- FIG. 4 also shows the opening 38 in the back wall 40 which terminates the top end of the vertical duct 32.
- the magnetron When the oven was operated without the use of a vertical duct and with the use of a rear input port, there was not sufficient cooling provided for the magnetron, and thus the temperature limit switch associated therewith caused intermittent operation of the magnetron. Typically, the magnetron should not be operated at its coolingfins in excess of approximately 235 F. With the use of a vertical duct interconnecting to the bottom chamber 28 sufficient cooling was provided to enable continuous operation of a magnetron. Also, this operation was tried with all of the burners 14 on which would be the worst case condition.
- the cross sectional area A1 of the duct 32 should be larger than the cross section of the opening 38.
- the ventilation duct 32 has an 8 X 1 1/2 inch cross section and the opening 38 has a 7 X 1 H2 inch opening.
- the area Al should not be made too much larger than the area A2 as this would decrease the velocity of the air moving up the vertical duct 32.
- the air should be drawn up the duct at approximately 80 cu. ft. per minute.
- the opening 34 in the bottom be slightly larger in area than the area Al. The dimensions of this opening may be 8 inches by 2 inches for example.
- a cooking apparatus comprising; a bottom section having a plurality of upright walls, a back wall and a bottom plate defining a chamber having'at least one port for carrying air from outside the apparatus to the chamber, said chamber being a source of relatively cool air, a top section including a microwave oven having electrical components including a magnetron, and
- a circulating blower with an air intake port means intermediate the top and bottom sections for structurally interconnecting the top and bottom sections with the top section disposed at normal eye level,v and a ventilation duct that continuously extends from said bottom chamber to said microwave oven, said microwave oven having an opening for receiving the top end of the ventilation duct and said bottom section having a rear wall defining in part the chamber, said rear wall having an opening for receiving the bottom end of the ventilation duct, said ventilation duct having a cross-sectional area smaller than the cross-sectional area of the opening I from the rear wall defining the bottom chamber.
- blower and duct are constructed to pass air at a rateof approximately cubic feet per minute.
- microwave oven has an output air vent and means defining an output plenum chamber for receiving area from the blower and exiting air via the output air vent.
Abstract
Description
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00257185A US3818171A (en) | 1972-05-26 | 1972-05-26 | Microwave cooking apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00257185A US3818171A (en) | 1972-05-26 | 1972-05-26 | Microwave cooking apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US3818171A true US3818171A (en) | 1974-06-18 |
Family
ID=22975242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00257185A Expired - Lifetime US3818171A (en) | 1972-05-26 | 1972-05-26 | Microwave cooking apparatus |
Country Status (1)
Country | Link |
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US (1) | US3818171A (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3912349A (en) * | 1974-08-19 | 1975-10-14 | Gen Electric | Base grille of a household refrigerator |
US4021642A (en) * | 1975-02-28 | 1977-05-03 | General Electric Company | Oven exhaust system for range with solid cooktop |
US4180049A (en) * | 1978-01-09 | 1979-12-25 | Whirlpool Corporation | Oven assembly air circulation system |
US4254450A (en) * | 1978-08-21 | 1981-03-03 | General Electric Company | Lamp assembly for combination microwave oven and exhaust vent |
US4282416A (en) * | 1978-08-21 | 1981-08-04 | General Electric Co. | Unitized structure for a microwave oven |
US4297558A (en) * | 1979-05-01 | 1981-10-27 | Rinnai Kabushiki Kaisha | Composite cooking device |
US4313043A (en) * | 1978-08-21 | 1982-01-26 | General Electric Company | Combination microwave oven and exhaust vent and installation mounting method therefor |
US4327274A (en) * | 1978-08-21 | 1982-04-27 | General Electric Company | Ventilation system for combination microwave oven and exhaust vent |
US4354084A (en) * | 1978-06-09 | 1982-10-12 | Bosch Siemens Hausgerate Gmbh | Twin baking oven, particularly built-in baking oven |
US4418261A (en) * | 1982-01-15 | 1983-11-29 | Amana Refrigeration, Inc. | Microwave oven and ventilator system |
US4444175A (en) * | 1982-12-29 | 1984-04-24 | Reynolds Howard S | Convection heated secondary oven |
US4549055A (en) * | 1983-12-12 | 1985-10-22 | Whirlpool Corporation | Ventilating means for cooking apparatus |
US4618756A (en) * | 1985-07-08 | 1986-10-21 | Whirlpool Corporation | Air circulation system for microwave oven |
US4628185A (en) * | 1985-08-05 | 1986-12-09 | Black & Decker, Inc. | Toaster oven and protective hood |
US5866886A (en) * | 1997-04-10 | 1999-02-02 | General Electric Company | Triangular shaped air inlet for an over-the-range type oven |
US5981929A (en) * | 1996-12-20 | 1999-11-09 | Matsushita Electric Industrial Co., Ltd. | Heating cooker with a space-efficient ventilating arrangement |
US6543250B1 (en) | 2001-11-27 | 2003-04-08 | Dometic Corporation | Installation template for a mobile refrigerator |
US20110049136A1 (en) * | 2009-09-01 | 2011-03-03 | Manitowoc Foodservice Companies, Llc | Method and apparatus for venting a cooking device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3422809A (en) * | 1966-12-06 | 1969-01-21 | Modern Maid Inc | Self-cleaning oven |
US3654417A (en) * | 1970-10-30 | 1972-04-04 | Litton Precision Prod Inc | Microwave oven including air flow system |
-
1972
- 1972-05-26 US US00257185A patent/US3818171A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3422809A (en) * | 1966-12-06 | 1969-01-21 | Modern Maid Inc | Self-cleaning oven |
US3654417A (en) * | 1970-10-30 | 1972-04-04 | Litton Precision Prod Inc | Microwave oven including air flow system |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3912349A (en) * | 1974-08-19 | 1975-10-14 | Gen Electric | Base grille of a household refrigerator |
US4021642A (en) * | 1975-02-28 | 1977-05-03 | General Electric Company | Oven exhaust system for range with solid cooktop |
US4180049A (en) * | 1978-01-09 | 1979-12-25 | Whirlpool Corporation | Oven assembly air circulation system |
US4354084A (en) * | 1978-06-09 | 1982-10-12 | Bosch Siemens Hausgerate Gmbh | Twin baking oven, particularly built-in baking oven |
US4282416A (en) * | 1978-08-21 | 1981-08-04 | General Electric Co. | Unitized structure for a microwave oven |
US4313043A (en) * | 1978-08-21 | 1982-01-26 | General Electric Company | Combination microwave oven and exhaust vent and installation mounting method therefor |
US4327274A (en) * | 1978-08-21 | 1982-04-27 | General Electric Company | Ventilation system for combination microwave oven and exhaust vent |
US4254450A (en) * | 1978-08-21 | 1981-03-03 | General Electric Company | Lamp assembly for combination microwave oven and exhaust vent |
US4297558A (en) * | 1979-05-01 | 1981-10-27 | Rinnai Kabushiki Kaisha | Composite cooking device |
US4418261A (en) * | 1982-01-15 | 1983-11-29 | Amana Refrigeration, Inc. | Microwave oven and ventilator system |
US4444175A (en) * | 1982-12-29 | 1984-04-24 | Reynolds Howard S | Convection heated secondary oven |
US4549055A (en) * | 1983-12-12 | 1985-10-22 | Whirlpool Corporation | Ventilating means for cooking apparatus |
US4618756A (en) * | 1985-07-08 | 1986-10-21 | Whirlpool Corporation | Air circulation system for microwave oven |
US4628185A (en) * | 1985-08-05 | 1986-12-09 | Black & Decker, Inc. | Toaster oven and protective hood |
US5981929A (en) * | 1996-12-20 | 1999-11-09 | Matsushita Electric Industrial Co., Ltd. | Heating cooker with a space-efficient ventilating arrangement |
US5866886A (en) * | 1997-04-10 | 1999-02-02 | General Electric Company | Triangular shaped air inlet for an over-the-range type oven |
US6543250B1 (en) | 2001-11-27 | 2003-04-08 | Dometic Corporation | Installation template for a mobile refrigerator |
US20110049136A1 (en) * | 2009-09-01 | 2011-03-03 | Manitowoc Foodservice Companies, Llc | Method and apparatus for venting a cooking device |
US9191999B2 (en) | 2009-09-01 | 2015-11-17 | Manitowoc Foodservice Companies, Llc | Method and apparatus for venting a cooking device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MICRO-QUARTZ TECHNOLOGY CORPORATION, 1010 LYNDALE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MICRO-TRONICS, LTD. A CORP. F MN.;REEL/FRAME:004004/0072 Effective date: 19820603 Owner name: MICRO-QUARTZ TECHNOLOGY CORPORATION, A CORP. OF MN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MICRO-TRONICS, LTD. A CORP. F MN.;REEL/FRAME:004004/0072 Effective date: 19820603 |
|
AS | Assignment |
Owner name: MICRO-TRONICS, LTD., INC., 1010 LYNDALE AVE. NORTH Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MICRO-TRONICS, INC. A WI CORP.;REEL/FRAME:004024/0294 Effective date: 19820603 Owner name: MICRO-QUARTZ TECHNOLOGY CORPORATION 1010 LYNDALE A Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MICRO-TRONICS, LTD., INC. A MN CORP.;REEL/FRAME:004024/0290 Effective date: 19820714 |