Forced circulation

Inherent heating of the air in an oven by a high-velocity recirculating blower is used as constant rate thermal energy source. Constant temperature is maintained by varying the rate of blending of source of cooler air with the heated oven air. Automatic control of temperature is provided by a variable...     

The oven cooking cavity has a perforated top wall above which there is a substantially full width plenum chamber which receives from a rear exterior duct heated air and gases under pressure for discharge of the same downwardly through the cavity top substantially uniformly over the area of the same....     

Inherent heating of the air in an oven by a high-velocity recirculating blower is used as constant rate thermal energy source. Constant temperature is maintained by varying the rate of blending of source of cooler air with the heated oven air. Automatic control of temperature is provided by a variable...     

A convection oven is disclosed in which a duct for drawing hot air from the combustion chamber conveys the hot air to the heating chamber, said duct extending through the ventilation chamber and communicates therewith; it also communicates with an outlet duct so as to convey all the air drawn from the...     

An oven for treating food including a well of sheet metal material that is open at the top, a removable insert open at the top end located in the well, the side walls and bottom of the insert being spaced from the side walls and bottom of the well to define air circulating passages therebetween with...     

Food products are baked in a forced-convection oven having a baking chamber into and out of which a rack carrying the food products on superposed trays may be rolled. Air is circulated horizontally through the baking chamber by a pair of vertically disposed cross-flow fans. The circulating air enters...     

Disclosed is a portable grill assembly adapted for use on, for example, a kitchen countertop area. The assembly includes a somewhat L-shaped housing, the horizontally extending portion of which encloses a heating element and is topped by a grill element for supporting meat or other edibles for exposed...     

A tunnel oven for bakery purposes has a plurality of horizontally- and vertically-spaced hot air supply orifices in each of its vertical walls. At least some and preferably all such orifices are individually adjustable slots. Each wall also has air extraction orifices connected to suitable ducting.

An apparatus and method for holding food and the like at desired temperature and moisture levels for an extended period of time wherein there is provided a relatively still volume of air about the food which is heated by maintaining a regulated, temperature controlled, recirculating flow of heated air...     

An oven is disclosed having an inner shell forming a heatable oven chamber, a conveyor within the oven chamber, a layer of insulation around the inner shell, an exterior cabinet shell spaced outward from the insulation, and a fan for moving a flow of cooling air between the insulation and the exterior...     

Disclosed is an oven which may or may not be incorporated in a domestic cooking range. The oven is characterized by the presence of a fan inset in one side wall of the oven. A plate having upper and lower slots approximately aligned with the conventionally located upper and lower oven heating elements...     

A hot blast type oven comprising an outer casing defining a heating chamber adapted to receive foodstuff to be cooked and having a front door for opening and closing the heating chamber. A main burner serves for producing hot gases sent to the heating chamber by a blower. A gas control section including...     

A fast food service technique in which a meal is pre-cooked and then transferred to a tray in which the food is refrigerated at a temperature just above its freezing point to preserve the meal without degrading its texture or flavor. When the food is to be made available to customers, the cold trays...     

A microwave oven providing the combination of dielectric heating by the use of microwaves and resistive heating for scorching the surface of a food. An isolation chamber for accommodating an article to be heated by a resistive heater is formed adjacent to the resistive heater provided in a heating cavity....     

The gas burner and blower powered oven includes a mixing chamber of appreciable length that receives bottom outflow air from the oven and, in general opposition, an input from the burner which includes make-up room air. A substantial flame is produced in the chamber for combusting volatiles in the oven...     

A forced convection oven heated by burners in a combustion chamber beneath the oven. Hot gases pass via an outlet port into the restricted part of a pressure-reducing throat forming the central lower portion of a U-shaped passageway whose vertical limbs provide inlet and outlet manifolds to the oven...     

A microwave oven in which the amount of ventilation for a heating chamber is changed dependent upon whether the heating time is controlled automatically or whether the heating time is controlled by manually setting a timer or a like device, whereby the deposition of dew on the wall of the heating chamber...     

A method and apparatus for heating articles, such as eyeglass frames, includes a bed of heat retentive beads supported above a plenum chamber by a mesh or screen. Heated air is delivered to the plenum chamber at low velocity and high volume for flowing upwardly through the bed for heating the same. The...     

An industrial process oven is provided with a false outer skin spaced from the oven wall. A plurality of air currents are induced and estalished in a like plurality of air passages provided between the oven wall and the outer skin. As ambient air passes over the oven wall it is preheated. The preheated...     

A food service system for institutional or other use is provided by a stack of insulated trays and a cart. In one embodiment the cart includes a heating and/or cooling source with an outlet and a return. The trays are provided with openings to permit the passage of heated or cooled air from the outlet...     

In a high-frequency energy apparatus, a heat generating element is disposed on a ventilation path of the high-frequency energy apparatus, which path is channeled through a heating chamber. When the heating time is automatically controlled, external air is introduced into the heating chamber, and when...     

A ventilated stove for use in recreational vehicles and the like that includes an oven which is divided into an upper and lower compartment. Positioned between the upper and the lower compartments is a gas burner. A reversible blower communicates with the oven through a duct and can be selectively rotated...     

Jets of heated gaseous fluid are perpendicularly directed against the surface of a food product, moving relative to said jets, such that the jets impinge against discrete points on said surface, before fluid in the jets is diffused, to wipe away the boundary layer of air and moisture from said discrete...     

A circulating air oven having a power portion which provides heat which is sent through its open front. The power portion is permanently mounted onto a pedestal which can detachably receive an oven portion. The oven portion includes a removable rear wall so that the entire rear of the oven portion can...     

An assembly of vertically spaced ovens with an air passage at the bottom of the upper oven and top of the lower oven having an inlet at the rear, and an outlet at the front of the assembly. An air moving device is provided for causing air flow forwardly through the passage to cool the oven structure....     

An apparatus for heating food includes a treating chamber, a multilevel shelving in the treating chamber for supporting the food to be heated; a plurality of blowers arranged in the treating chamber; and heating elements associated with the blowers for generating hot air currents. All the blowers are...     

A machine for dehydrating food, as an aid toward preservation of food for extended periods of time. Intake air may be obtained from either the exterior of the machine or a combination of exterior and recycled air. Intake air is electrically heated and pressurized in a plenum chamber by a fan. The pressurized...     

An electrical hot air grill includes a control and stand unit, a blower and heating unit, a grilling compartment bounded by two shells, a device for supporting articles to be grilled in the grilling compartment and an apertured plate mounted on the blower and heating unit and arranged between the blower...     

The invention relates to a cabinet in which food packages, such as prepared school lunch packages, can be heated prior to serving, and maintained at a desired temperature before and during serving. The cabinet comprises an upwardly opening well closed by removable lids, a housing connected to and surrounding...     

An electrically operated dehydrator in the form of perforated trays stacked one on top of the other where the bottom tray is equipped with a blower-heater package and the top tray forms a solid cover. Air is drawn in by the blower from underneath the bottom tray, it is heated and then forced to rise...     

The problem of properly cooking food and handling heated food so that it retains a fresh-cooked taste, fragrance and appealing appearance is solved by apparatus that includes an inner wall means (15) defining an inner chamber (16) and an outer wall means (17) defining an air circulating passage (18)...     

A microwave oven for cooking food by means of both microwave energy and convective heating which includes within it, a substantially closed microwave transparent container into which food to be cooked is placed, a heating element for convectively heating air, and means for blowing air past the heating...     

A cartridge formed by a vertical stack of sealed trays nested within an open carton, the cartridge being used in conjunction with a hot-air oven which reheats pre-cooked meals contained in the trays to a temperature suitable for serving. The geometry of the carton and the distribution of openings in...     

A cooking device with a microwave heater and a gas heater as well as a cooling fan for the microwave heater. A first circuit operates the microwave heater and is connected to a source of electric power through a first switching circuit. A second circuit operates the gas heater and is connected to the...     

A hot air grill comprises a base having a vertical portion and a horizontal portion, which are hingedly connected with one another. A transparent casing for food to be cooked sits on the horizontal base portion and has an opening in one side to receive a heating assembly mounted on the vertical base...     

An oven that is particularly suited for preparing barbecued foods with minimal consumption of wood includes a housing that encloses an oven chamber and an apertured firebox that extends into the oven chamber from one of the housing walls. The firebox is closed by a door that is located at the exterior...     

A system for rapidly raising the temperature of a product having low thermal conductivity from a cold to a heated state in a manner bringing the internal temperature of the entire body of the product to substantially the same predetermined elevated temperature level. The system includes a chamber having...     

Forced hot air alimentary oven comprises an insulated housing, vertically extending chambers situated at opposite sides of the housing, a plurality of parallel, superposed cooking compartments extending horizontally across the housing, heating elements, and a motor-driven fan for forcing the heated air...     

A gas-fueled oven which is capable of safely assuming high temperatures such as occur during pyrolytic self-clean cycles and which employs a single multi-purpose fan for directing cool air flows over wall surfaces, for providing aspiration and temperature dilution of hot flue products, and for providing...     

A microwave oven of the type which is built in a recess formed in a wall of, for example, a home kitchen includes a box-like air guide member to be mounted on the microwave oven. The air guide member generally comprises side panels, front and rear panels, and top panel, and the front panel is provided...     

A cooking gas oven of the type with a heating housing having a door on its front and a combustion chamber of forcible exhaust type disposed below the heating housing. A burner is provided in an oven main body. There is formed in the combustion chamber, an intake passage for introducing the external air...     

A space heating stove is located near a wall-supported shield which has an internal airflow passage. Heat radiated by the stove to the shield heats air in the airflow passage, and a fan moves this heated air from the channel into a duct system which releases the heated air into the building.

Directed jets of temperature controlled gaseous fluids are applied to irregularly shaped products, such as food portions, to subject discrete areas of the surface to a very high heat transfer rate and to cause these areas to be passed over surfaces of the product at a proper rate to obtain over-all surface...     

A food processing unit and method of processing food uses a housing which receives vertically disposed layers of food product. The temperature of the fluid within the housing is controlled to process the food product. A pressurized fluid is supplied into the housing and the fluid within the housing is...     

Baking oven including chamber walls defining a baking oven chamber, a door for closing off the chamber, a broiler heating element and at least one further heating element being disposed in vicinity of opposite chamber walls, and air blowing and guiding means disposed between the heating elements for...     

A portable air circulating apparatus for use in cooking ovens which is used to create air currents in the oven which transfer heat to cooking foodstuffs to promote more rapid and more uniform cooking or baking, the apparatus including a motor, fan blade and housing of metallic materials selected from...     

A convection oven in which vapor is circulated through the oven by a pair of counter rotating blowers positioned in the rear of the oven which draw vapor from the oven along with combustion products from a multi-section ribbon burner which has a secondary air passage between the sections and which is...     

A counter-top oven adapted to effect low-temperature cooking of food at a relatively rapid rate whereby food nutrients and other valuable constituents are preserved. The oven includes a food-receiving compartment having a perforated wall and means to heat air to a temperature well above the cooking temperature...     

A self-clean oven having means for passing cooling air over the heated walls of the oven and further having means for supplying combustion air by normal inspiration to the oven burners independently of the flow of cooling air, and having still further means for mixing hot combustion products exhausted...     

The invention concerns a stove comprising a burner, a combustion chamber, transport and exit ducts for the combustion gases, and at least one heating unit, such as a hearth plate or an oven. According to the invention, the stove comprises warm air duct with inlet and outlet and a blower, arranged to...     

A system for installation on aircraft to serve trays containing precooked food to passengers, the food-loaded trays being placed in the aircraft in the cold state and being heated to a service temperature level. The system includes a locker adapted to accommodate a bank of open-end racks, each having...     

Disclosed is a commercial convection cooking equipment having an outer casing and inner food cooking chamber forming channel(s) therebetween with air intake vent and fan to force air through such channel(s) to cool portions of the outer casing and then when such air is heated, to redirect the hot air...     

A microwave convection oven in which a gas burner positioned outside the oven cavity has its combustion products circulated through the oven through screens for preventing escape of the microwave energy from the oven cavity with the burner being of the multi-ported type providing high burner density...     

A burner box divided into two chambers by a partition having two orifice hoods and an electrical connector rigidly mounted thereto, the hoods and connector facing into one of the chambers which functions as a compartment for removably inserting a modular gas burner cartridge. The cartridge may include...     

A system of combining a microwave oven and ventilator over a range top or the like wherein the ventilator comprises an assembly including a central oven receiving compartment and air handling components providing for an exhausting of the range top atmosphere and a maintenance of the oven in a relatively...     

An energy efficient convection barbecue pit for uniform cooking of meat. Heated smoke from a firebox passes through a joinder flue into a cooking chamber and is there urged upward by means of an inlet baffle. A convection fan located within a discharge duct connected to the ceiling of the cooking chamber...     

A storage device for processed foods comprising a sealed storage chamber, an air passage provided in the storage chamber so as to extend along an inner surface thereof and having a suction port and a discharge port at upper and lower sections thereof, respectively, to permit the air to be circulated...     

A combination microwave gas convection oven having a tubular burner operating in an induced draft environment. A blower system draws air from a combustion chamber forcing it into the heating cavity. The slight pressure created in the combustion chamber draws in air from the heating cavity through perforations...     

A gas cooking range includes a number of energy-efficient features. The range includes an oven section in which combustion air is preheated by heated discharge gases. Panels are spaced from the walls of the oven and circulation fans are included to provide exceedingly effective airflow within the oven....     

A combination microwave and convection oven in which a gas burner positioned outside the oven provides heated combustion products which are drawn from the burner area along with vapor from an outlet of the oven by a blower system and the combined output of the blower system is blown into the oven through...     

Disclosed are an improved method and apparatus for convection heating which enables rapid heating of foods to obtain a fried taste, texture and appearance without using large amounts of oil or encountering the other disadvantages of frying. According to a preferred embodiment of the apparatus which performs...     

A portable air circulating apparatus for use in cooking ovens which is used to create air currents in the oven which transfer heat to cooking foodstuffs to promote more rapid and more uniform cooking or baking, the apparatus including a motor, fan blade and housing of metallic materials selected from...     

An improved apparatus and method for heating food products by forced air convection are disclosed. The apparatus comprises a tunnel heater having a tunnel-like cavity through which food products to be heated are conveyed. Air is drawn from within the tunnel cavity by a circulating blower arrangement,...     

A heat exchanger for use with a portable oven. The disclosed heat exchanger maximizes the conversion of heat caloric content of a combustible fuel to useable heat energy. A gas fueled infra-red burner mounted above the heat exchanger directs radiant energy toward a metal plate which also is contacted...     

A cooking apparatus for performing a microwave cooking operation and a convection cooking operation wherein heated air is circulated in an oven cavity. An air intake aperture is formed at the center of the ceiling wall of the oven cavity. The air removed through the air intake aperture is heated up by...     

A convection oven being an air distribution chamber above the main cooking compartment is the subject of the present invention. A centrifugal fan draws air from the cooking compartment into the air chamber and directs the air outwardly past an electrical heating element mounted within the air chamber...     

A gas-fired convection oven for processing food, for example, having a fan for moving air along a circulatory path over, along and about the food to be processed. A package type gas burner outside the oven is directed into a heat exchanger tube of substantial length extending into the oven. High-temperature...     

An oven having a heating chamber in which a perforate food container is rotatably mounted about a center axis of rotation. The container has, relative to its longitudinal center axis, a symmetrical octagonal configuration so as to comprise two planar end walls and eight symmetrically arranged sidewalls....     

An airtight oven comprises at least two doors and a filter arrangement, through which the air within the oven is circulated in a closed circuit by means of a circulator. This closed circuit optionally includes means for adjusting the temperature of the air. The filter arrangement comprises a frame loosely...     

Apparatus and method for imparting thermal energy to food products, the apparatus comprising a heating section with microwave generating apparatus and impingement heating apparatus for either sequentially or sequentially and simultaneously thermally treating the interior and surface portions of food...     

A conventional gas oven having exhaust holes in the high air pressure region of a heating chamber has a drawback that when a circulation fan is rotating, hot air is constantly discharged to cause a great heat loss. According to the present invention, exhaust holes are provided in or adjacent a region...     

An oven for food comprises a housing and a stationary support inside the housing with a position for supporting the food. A fan and an electric element supply a stream of hot air to the inside of the housing. A rotating drum has a supply opening for directing the stream of hot air towards the position...     

An oven for heating foodstuffs, i.e. cooking pizza, has a heated enclosure substantially L-shape in plan to leave an exposed sector. A rotor is turned intermittently by power to carry pizzas from the exposed sector, through the heated enclosure and back to the exposed sector. In the heated enclosure...     

A highly compact oven for preparing barbecued foods on a commercial basis includes a cabinet having a vertical partition wall that divides its interior into an oven chamber and an equipment compartment, and a door which closes the front of the oven chamber. In addition, the oven has a rotisserie for...     

A muffle oven for the heating of foodstuffs has a closed housing with a treatment chamber separated by a perforated partition from an air-circulating compartment which forms rear and lateral air spaces surrounding that chamber on three sides. A radial blower, driven by an external motor located at an...     

A fiber treatment oven is disclosed in which hot gas is flowed parallel to and between fiber pathways within the oven to reduce deflection and breakage of fibers and to reduce end-to-end temperature variations in the oven. Hot gas is emitted centrally of the oven and flows toward ends of the oven. Preferably,...     

A forced air circulation heating apparatus in which an air stream is heated at a first location in a conduit means and transported to a second location within the apparatus by the conduit means and is forced into a heating compartment and mixed with a recirculated forced air flow within the compartment....     

The oven includes a muffle 1 in which are mounted at least one upper heating element 11b, 11b, at least one lower heating element 14, an air circulating fan 4 provided in the rear wall 3 of the muffle 1, a heating element 6 placed in the current of air produced by the fan 4, a device 8 for ducting the...     

An oven and method for cooking food products. The oven comprises an elongated housing having an inlet for food products to be cooked in the oven and an outlet for emitting cooked food product from the oven, together with means for heating a gaseous cooking medium in the housing for cooking the food products...     

A cooking apparatus wherein a control for controlling the operation of one or more portions thereof is located in a position where it could be affected by hot, contaminated air rising from heating portions of the apparatus. The control is mounted in a cabinet space which is pressurized so as to prevent...     

An air circulator for an oven is described formed of a self-contained housing sized to be placed at a convenient location inside the oven with food being heated. The housing encloses a spring motor and a propeller connected to the motor through a reduction gear train. An air flow is produced from a housing...     

Food articles tending to exclude fat are heated in cooking apparatus provided with a floor removable for cleaning and of double-walled construction so that cooling air can be blown through to reduce or eliminate the risk that fat collected on the floor will ignite. The air flow is controlled so as to...     

A highly compact oven for preparing barbecued foods on a commercial basis includes a cabinet having a vertical partition wall that divides its interior into an oven chamber and an equipment compartment, and doors which provide access to the oven chamber. In addition, the oven has a rotisserie for supporting...     

An improved apparatus and method for heating food products by forced air convection are disclosed. The apparatus comprises a tunnel heater having a tunnel-like cavity through which food products to be heated are conveyed. Air is drawn from within the tunnel cavity by a circulating blower arrangement,...     

Disclosed are an improved method and apparatus for heating which enables rapid heating of foods to obtain any one of a number of textures. A fried taste, texture and appearance can be achieved without using large amounts of oil or encountering the other disadvantages of frying. According to a preferred...     

A food processor (20), such as a smokehouse, cooker, dryer or the like, includes a food receiving chamber (22) having left and right ports (24 and 26) closed and opened by air flow control means provided by pivoted perforated louvers (44 and 46). For rightward horizontal air flow across flat-lying food...     

A heating cabinet is formed of inner and outer side and bottom walls defining an antechamber between them which communicates only at the bottom wall portion with a rear air passage chamber formed between the inner and outer rear walls. A one-piece U-shaped heater of meander-like shape is contained in...     

A baking oven comprising a housing having a proofer compartment and a baking compartment. Doors are provided for access to the compartment. Support racks are disposed in the compartments for supporting dough products therein. A heating element and conduit are associated with the proofer compartment for...     

A baking oven has a baking chamber in which plate members carrying the baking good are stepwisely conveyed along an endless path. The baking chamber has a charging and discharging opening through which a branch of this endless path is fed to a charging and discharging station located outside of the baking...     

A food preparation oven for baking foods which require less heat energy input into a first surface than into a second surface such as pizzas. A radiant panel is provided which is heated by means of hot air and which is positioned to heat one surface of the food product by radiant heat energy. The second...     

An oven system comprises a grill unit and a microwave oven unit built into a standard kitchen unit framework or other structure for receiving same with the grill unit surmounting the microwave oven unit. A duct extends from the rear of the microwave oven unit, upwardly past the rear of the grill unit,...     

A damper control is employed in the exhaust duct of a bakery oven to maintain constant air mass flow through the duct during a baking cycle to ensure even baking conditions. The damper control can include a pitot tube from which velocity pressure can be derived, and a pneumatic or electronic control...     

The device for mounting a cooking apparatus of the present invention on a wall and the like in a kitchen comprises a wall fixing member to be fixedly mounted on the wall and provided with reinforcing members projecting forward; a supporting member rotatable up-and downwardly and provided with grooves...     

A roaster for roasting meat is proposed. Smoke emitted by meat while it is roasted is drawn into a smoke intake flue through a pair of openings provided along and over the longitudinal edges of a rectangular griddle. Then the smoke is purified by a smoke purifier disposed under the griddle.

A microwave oven has a trivet in the form of a perforated metal plate which is a receptacle for food, is metal and is supported on a turntable of the oven. The metal plate and the turntable are both insulated by stove enamel to prevent sparking. The plate and the turntable enclose a space which is thereby...     

An efficient, low cost, gas-fired convection oven is disclosed. The oven includes a burner, such as a ceramic induced draft/boosted burner with premixed pressurized air/fuel gas supply, which fires combustion products through an opening in a baffle directly into a convection blower. The blower assembly,...     

An impingement device (10) for preparing food product comprises an enclosure (12) having a conveyor (18) received therethrough for conveying food product through the enclosure (12). Positioned within the enclosure (12) and about the conveyor (18) portion therein are ducts (36) for impinging gas against...     

Described herein is a controlled circulation incubator device having a plurality of plate receiving trays held by a tray bracket. Heated air is circulated by a blower and heater assembly around the trays held by the tray bracket and the temperature of the flowing heated air is sensed by a thermister...     

A cooking oven for cooking foodstuffs with either steam or forced convection hot air. In the steam mode, steam is continuously generated in the oven cavity. Alternatively, in the convection mode, the amount of moisture supplied to the cavity is controlled. A fan circulates the air or steam in the oven...     

A rethermalization oven for heating food is disclosed, characterized by uniform distribution of heat and air through a heating chamber. The oven includes a housing and partitions for defining an outer U-shaped air plenum, a rectangular heating chamber, and a burner chamber. The side panels of the partition...