OVEN APPLIANCE WITH BOTTOM BROIL ELEMENT

Abstract

An oven appliance includes a cabinet defining a vertical direction, a lateral direction, and a transverse direction. The vertical, lateral, and transverse directions are mutually perpendicular. The cabinet comprising a front portion spaced apart from a back portion along the transverse direction and a left side spaced apart from a right side along the lateral direction. The oven appliance also includes a chamber defined within the cabinet for receipt of food items for cooking. A broil heating element is positioned proximate to a bottom portion of the chamber.

Claims

1. An oven appliance, comprising: a cabinet defining a vertical direction, a lateral direction, and a transverse direction, the vertical, lateral, and transverse directions being mutually perpendicular, the cabinet comprising a front portion spaced apart from a back portion along the transverse direction and a left side spaced apart from a right side along the lateral direction; a chamber defined within the cabinet for receipt of food items for cooking; and a broil heating element positioned below a bottom wall of the chamber.

2. The oven appliance of claim 1, wherein there are no heating elements positioned proximate a top wall of the chamber.

3. The oven appliance of claim 1, wherein the broil heating element is a gas burner.

4. The oven appliance of claim 3, wherein the gas burner is the only combustive heat source for the chamber.

5. The oven appliance of claim 3, further comprising an electric heating element proximate to the top wall of the chamber.

6. The oven appliance of claim 1, wherein the broil heating element is positioned proximate a back wall of the chamber.

7. The oven appliance of claim 1, further comprising a natural convection flow path defined through the chamber, the natural convection flow path extending from an origin at the broil heating element to a top wall of the chamber.

8. The oven appliance of claim 7, wherein the natural convection flow path extends from the broil heating element, upward along the vertical direction across a back wall of the chamber, and forward along the transverse direction across the top wall of the chamber.

9. The oven appliance of claim 1, further comprising a bake heating element proximate to the broil heating element.

10. The oven appliance of claim 9, wherein the bake heating element is an electric heating element.

11. An oven appliance, comprising: a cabinet defining a vertical direction, a lateral direction, and a transverse direction, the vertical, lateral, and transverse directions being mutually perpendicular, the cabinet comprising a front portion spaced apart from a back portion along the transverse direction and a left side spaced apart from a right side along the lateral direction; a chamber defined within the cabinet for receipt of food items for cooking; and a broil heating element positioned proximate to a bottom portion of the chamber.

12. The oven appliance of claim 11, wherein there are no heating elements positioned proximate a top wall of the chamber.

13. The oven appliance of claim 11, wherein the broil heating element is a gas burner.

14. The oven appliance of claim 13, wherein the gas burner is the only combustive heat source for the chamber.

15. The oven appliance of claim 13, further comprising an electric heating element proximate to the top wall of the chamber.

16. The oven appliance of claim 11, wherein the broil heating element is positioned proximate a back wall of the chamber.

17. The oven appliance of claim 11, further comprising a natural convection flow path defined through the chamber, the natural convection flow path extending from an origin at the broil heating element to a top wall of the chamber.

18. The oven appliance of claim 17, wherein the natural convection flow path extends from the broil heating element, upward along the vertical direction across a back wall of the chamber, and forward along the transverse direction across the top wall of the chamber.

19. The oven appliance of claim 11, further comprising a bake heating element proximate to the broil heating element.

20. The oven appliance of claim 19, wherein the bake heating element is an electric heating element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] A full and enabling disclosure of the present invention, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures.

[0011] FIG. 1 provides a front view of an exemplary oven appliance according to one or more embodiments of the present subject matter.

[0012] FIG. 2 is a cross-sectional view of the oven appliance of FIG. 1 according to one or more embodiments of the present subject matter.

[0013] FIG. 3 provides a cross-sectional view of the oven appliance of FIG. 1 according to one or more additional embodiments of the present subject matter.

[0014] FIG. 4 provides a schematic view of flow paths for hot gases within the oven appliance of FIG. 2.

[0015] FIG. 5 provides a schematic view of flow paths for hot gases within the oven appliance of FIG. 3.

DETAILED DESCRIPTION OF THE INVENTION

[0016] Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.

[0017] As used herein, terms of approximation, such as “generally,” or “about” include values within ten percent greater or less than the stated value. In the context of an angle or direction, such terms include values within ten degrees greater or less than the stated direction. For example, “generally vertical” includes directions within ten degrees of vertical in any direction, e.g., clockwise or counter-clockwise.

[0018] FIGS. 1 through 3 illustrate an oven appliance 100 according to an exemplary embodiment of the present subject matter. Oven appliance 100 includes an insulated cabinet 102 which defines a vertical direction V, a lateral direction L, and a transverse direction T. The vertical, lateral, and transverse directions V, L, and T are mutually perpendicular and form an orthogonal direction system. Cabinet 102 extends between a top portion 40 and a bottom portion 42 along the vertical direction V. Cabinet 102 extends between a left side 44 and a right side 46 along the lateral direction L and between a front portion 48 and a back portion 50 along the transverse direction T.

[0019] Still referring to FIGS. 1 through 3, in various exemplary embodiments, oven appliance 100 includes an insulated cabinet 102 with an interior cooking chamber 104 defined by a top wall 112, a bottom wall 114, a back wall 116, and a pair of opposing side walls 118. Cooking chamber 104 is configured for the receipt of one or more food items to be cooked. Oven appliance 100 includes a door 108 pivotally mounted to cabinet 102 at the opening 106 of cabinet 102 to permit selective access to cooking chamber 104 through opening 106. A handle 110 is mounted to door 108 and assists a user with opening and closing door 108. For example, a user can pull on handle 110 to open or close door 108 and access cooking chamber 104.

[0020] Oven appliance 100 can include a seal (not shown) between door 108 and cabinet 102 that assists with maintaining heat and cooking vapors within cooking chamber 104 when door 108 is closed as shown in FIGS. 1 through 3. Multiple parallel glass panes 122 provide for viewing the contents of cooking chamber 104 when door 108 is closed and assist with insulating cooking chamber 104. A baking rack 142 is positioned in cooking chamber 104 for the receipt of food items or utensils containing food items. Baking rack 142 is slidably received onto embossed ribs or sliding rails 144 such that rack 142 may be conveniently moved into and out of cooking chamber 104 when door 108 is open.

[0021] One or more heating elements may be included at the top, bottom, or both of cooking chamber 104 to provide heat to cooking chamber 104 for cooking. Such heating element(s) can be gas, electric, microwave, or a combination thereof. For example, in the embodiments shown in FIGS. 2 and 3, oven appliance 100 includes a first bottom heating element 126, where first bottom heating element 126 is positioned adjacent to and below bottom wall 114 and adjacent to and in front of back wall 116. In particular, the bottom heating element 126 in the embodiment illustrated in FIGS. 2 and 3 is a gas burner. In some example embodiments the oven appliance 100 may also include a second bottom heating element 125, such as the bottom electric heating element 125 illustrated in FIGS. 2 and 3. In additional embodiments, e.g., as illustrated in FIG. 3, the oven appliance 100 may also a top heating element 124 in addition to the bottom heating elements 125 and 126, where the top heating element 124 may be, e.g., a resistance heating element 124 as illustrated in FIG. 3.

[0022] In various embodiments, more than one top heating element 124 and/or more than one bottom heating element (gas burner) 126 may be provided in various combinations, e.g., one top heating element 124 with two or more gas burners 126, two or more gas burners 126 with no top heating element 124, etc.

[0023] Oven appliance 100 includes a user interface 128 having a display 130 positioned on an interface panel 132 and having a variety of controls 134. Interface 128 allows the user to select various options for the operation of oven 100 including, e.g., various cooking and cleaning cycles. Operation of oven appliance 100 can be regulated by a controller 140 that is operatively coupled to, i.e., in communication with, user interface 128, heating elements 124, 126, and other components of oven 100 as will be further described.

[0024] For example, in response to user manipulation of the user interface 128, controller 140 can operate the heating element(s). Controller 140 can receive measurements from one or more temperature sensors (not shown) which are in or in thermal communication with the cooking chamber 104. Controller 140 may also provide information such as a status indicator, e.g., a temperature indication, to the user with display 130. Controller 140 can also be provided with other features as will be further described herein.

[0025] Controller 140 may include a memory and one or more processing devices such as microprocessors, CPUs, or the like, such as general or special purpose microprocessors operable to execute programming instructions or micro-control code associated with operation of oven appliance 100. The memory may represent random access memory such as DRAM or read only memory such as ROM or FLASH. In one embodiment, the processor executes programming instructions stored in memory. The memory may be a separate component from the processor or may be included onboard within the processor. The memory can store information accessible by the processor(s), including instructions that can be executed by processor(s). For example, the instructions can be software or any set of instructions that when executed by the processor(s), cause the processor(s) to perform operations. For the embodiment depicted, the instructions may include a software package configured to operate the system, e.g., to execute exemplary methods of operating the oven appliance 100. Controller 140 may also be or include the capabilities of either a proportional (P), proportional-integral (PI), or proportional-integral-derivative (PID) control for feedback-based control implemented with, e.g., temperature feedback from one or more sensors such as temperature sensors and/or probes, etc.

[0026] Controller 140 may be positioned in a variety of locations throughout oven appliance 100. In the illustrated embodiment, controller 140 is located next to user interface 128 within interface panel 132. In other embodiments, controller 140 may be located under or next to the user interface 128, otherwise within interface panel 132, or at any other appropriate location with respect to oven appliance 100. Generally, controller 140 will be positioned within the cabinet 102. In the embodiment illustrated in FIG. 1, input/output (“I/O”) signals are routed between controller 140 and various operational components of oven appliance 100 such as heating elements 124, 126, 136, convection fan 138, controls 134, display 130, alarms, and/or other components as may be provided. In one embodiment, user interface 128 may represent a general purpose I/O (“GPIO”) device or functional block.

[0027] Although shown with touch type controls 134, it should be understood that controls 134 and the configuration of oven appliance 100 shown in FIG. 1 is provided by way of example only. More specifically, user interface 128 may include various input components, such as one or more of a variety of electrical, mechanical, or electro-mechanical input devices including rotary dials, push buttons, and touch pads. User interface 128 may include other display components, such as a digital or analog display device designed to provide operational feedback to a user. User interface 128 may be in communication with controller 140 via one or more signal lines or shared communication busses.

[0028] While oven 100 is shown as a wall oven, the present invention could also be used with other cooking appliances such as, e.g., a stand-alone oven, an oven with a stove-top, or other configurations of such ovens. Numerous variations in the oven configuration are possible within the scope of the present subject matter. For example, variations in the type and/or layout of the controls 134, as mentioned above, are possible. As another example, the oven appliance 100 may include multiple doors 108 instead of or in addition to the single door 108 illustrated. Such examples include a dual cavity oven, a French door oven, and others. As still another example, one or more of the illustrated electrical resistance heating elements may be substituted with gas burners or microwave heating elements, or any other suitable heating elements. The examples described herein are provided by way of illustration only and without limitation.

[0029] As shown in FIGS. 2 and 3, the gas burner 126 may be positioned proximate to a bottom portion of the chamber 104, e.g., outside of the chamber 104 but within the cabinet 102 and positioned most proximate to the bottom wall 114 of the chamber 104. Thus, the gas burner 126 may be in thermal communication and in fluid communication with the chamber 104 through the bottom wall 114, such as through a hood 146 defined in the bottom wall 114. The hood 146 may have an open end positioned and oriented to direct combustion products (e.g., flames and hot gases) 148 from the gas burner 126 into the chamber. More particularly, the gas burner 126 may be in direct fluid communication with the chamber 104 through the hood 146 of the bottom wall 114, e.g., where combustion products 148 from the gas burner 126 are oriented directly into the chamber 104 through the hood 146 and not against any intermediate solid structure, such as a solid portion of the bottom wall 114 or a flame spreader. Thus, the combustion products 148 may follow a direct flow path, e.g., a path that extends along a straight line, unobstructed and uninterrupted by any solid components of the oven appliance 100, from the gas burner 126 to the cooking chamber 104 through the hood 146, as illustrated in FIGS. 2 and 3. The gas burner 126 may also be positioned at a rear portion of the chamber 104, such as most proximate to the back wall 116 of the chamber 104. Moreover, the hood 146 may be oriented generally upward, e.g., towards the top wall 112 of the chamber 104, along the vertical direction V, whereby the combustion products 148 flow by natural convection (e.g., heat rising) from the gas burner 126 into the chamber 104 through the hood 146. The gas burner 126 may also be oriented such that the gas burner 126, e.g., a longitudinal axis thereof, extends along the lateral direction L generally parallel to the back wall 116 of the chamber 104.

[0030] As shown in FIGS. 2 through 6, in some embodiments, the gas burner 126 may be the only combustive heat source (e.g., there are no other gas burners but the one) for the chamber. In further embodiments, the gas burner 126 may also be the only heat source for the chamber 104. The term “heat source” is intended to mean a source of direct heating of the chamber 104, such as a heating element in direct thermal communication with the chamber 104, e.g., which is oriented into or towards the chamber 104 without any intermediate thermally insulating structures. For example, such embodiments may also include ambient heat sources which are separated from the chamber 104 by at least a portion of the insulation of the insulated cabinet 102 and/or the door 108, including the windows 122 of the door 108. Such ambient heat sources may include, e.g., one or more burners on a cooktop of the oven appliance 100 in embodiments where the oven appliance 100 is a range appliance including a cooktop. Those of ordinary skill in the art will recognize that such cooktop elements would be positioned above the chamber 104 and oriented away from the chamber 104, such that the cooktop heating elements would not be considered as heat sources for the chamber 104 because such elements are separated from the chamber 104 by insulation and/or are not oriented towards or into the chamber 104.

[0031] As will be described in more detail below, the gas burner 126 proximate to the bottom portion of the chamber 104 and/or below the bottom wall 114 of the chamber 104 may be a broil heating element. For example, the gas burner 126 may be a source or the sole source of heat, e.g., in the form of combustion products 148 from the gas burner 126, for a broil operation which heats food in a top position within the chamber 104 by the bottom element 126.

[0032] Referring in particular to FIGS. 2 and 4, in some embodiments, the oven appliance 100 may not include any heating elements proximate the top wall 112 of the chamber 104, such that the gas burner 126 is the only heat source for a broil operation of the oven appliance 100. In such embodiments, combustion products 148 (FIG. 2) from the gas burner 126 may follow a natural convection flow path 200 (FIG. 4) within and through the chamber 104. As mentioned above, the natural convection flow path 200 may be partially defined by the positioning and orientation of the gas burner 126 and the hood 146, relative to each other and the chamber 104, such that the natural convection flow path 200 begins at the gas burner 126 and/or the hood 146. The hood 146 may be obliquely oriented and may thus be configured to direct the combustion products 148 up and back, e.g., to the back wall 116 and towards the top wall 112. Thus, the natural convection flow path 200 may be collectively defined by the hood 146, the back wall 116, the top wall 112, and at least partially defined by the door 108, as illustrated in FIG. 4.

[0033] More specifically, as illustrated in FIG. 4, the natural convection flow path 200 may, in some embodiments, extend from the gas burner 126, upward along the vertical direction V across the back wall 116 of the chamber 104, and forward along the transverse direction T across the top wall 112 of the chamber 104. As the combustion products 148 travel across the top wall 112, they may pass over and in close proximity to food items for broiling said food items. For example, such food items may be positioned on the rack 142 and the rack 142 may be placed on the uppermost rail 144 whereby the food items may absorb thermal energy from the combustion products 148 as the combustion products 148 travel forward across the top wall 112, such as across all or approximately the entire transverse length of the top wall 112. Also as illustrated in FIG. 4, the natural convection flow path 200 may then be directed downwards after reaching the end of the top wall 112, such as by encountering the door 108, as shown. Thus, the combustion products 148 may circulate throughout an entire perimeter of the chamber 104, or at least approximately all of each of three sides thereof, e.g., the sides of the chamber 104 defined by the back wall 116, the top wall 112, and the door 108. Thus, the gas burner 126 may thereby provide heat for broiling, e.g., when the combustion products 148 follow the natural convection flow path 200 from the gas burner 126 to the top wall 112 and across the top wall 112 from back to front.

[0034] As shown in FIGS. 3 and 5, in some embodiments, the oven appliance 100 may also include one or more top heating elements, such as the top electric resistance element 124. In such embodiments, where the top heating elements is an electric resistance heating element, the gas burner 126 is not the only heat source for the chamber, but may be the only combustive heat source for the chamber 104. In such embodiments, the broil operation may be similar to that described above with respect to FIGS. 2 and 5, where food items in the cooking chamber 104 may receive convection heat (illustrated by white arrows 204 in FIGS. 3 and 5) from the combustion products 148 travelling along the natural convection flow path 200 as described above. Additionally, when the top heating element 124 is provided, such food items may also receive radiant heat (illustrated by the downward shaded arrows 206 coming from top heating element 124 in FIG. 5) from the top heating element 124 during the broil operation.

[0035] As shown in FIGS. 2 through 5, in some embodiments, the oven appliance 100 may also include bottom electric heating element 125. In such embodiments, where the second bottom heating element is an electric resistance heating element, the gas burner 126 is not the only heat source for the chamber, but may be the only combustive heat source for the chamber 104. In such embodiments, a bake operation of the oven appliance 100 may include the additional, optional, activation of the bottom electric heating element 125 as well as the gas burner 126. When the bottom electric heating element 125 is activated, the cooking chamber 104 may thereby receive radiant heating (e.g., as illustrated by the upward shaded arrows 206 coming from the bottom electric heating element 125 and/or bottom wall 114 in FIGS. 4 and 5), e.g., directly from the bottom electric heating element 125 and/or via the thermally conductive bottom wall 114 of the chamber 104.

[0036] This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.