The present invention is directed to a home cooking appliance having an air guide, and more particularly, to a home cooking appliance having a cooling fan and an air guide capable of restricting air from a space between a cooktop and the chassis floor from being drawn into the cooling fan.
A conventional home cooking appliance, such as a slide-in gas range, may include a housing having a cooking compartment, such as a baking oven, convection oven, steam oven, warming drawer, etc., and a cooking surface formed, for example, by cooking grates disposed over gas burners on the top of the housing. Such a conventional slide-in range may be installed in a cooking area of a home kitchen between countertops and floor cabinets with a rear wall of the appliance facing a back wall of the kitchen. Industry standards and regulations commonly dictate acceptable temperatures of the combustible back wall behind the appliance, acceptable temperatures of cabinets or components over the range or adjacent to the range, as well as acceptable door temperatures for the appliance during operation. As a result, many conventional appliances include a cooling air system to maintain acceptable surface temperatures and oven door temperatures, to protect components in and around the appliance, etc.
The present invention recognizes that a home cooking appliance, such as a slide-in gas range, may include a cooktop having one or more gas burners or the like configured as bottom-breathing gas burners. In operation, such bottom-breathing gas burners may draw air (e.g., primary air) from a space between a cooktop surface supporting the gas burner (i.e., cooktop floor) and a chassis floor of the cooktop and mix the primary air with fuel (e.g., natural gas) to supply an air-gas mixture to a burner head of the gas burner. During operation of one or more cooking components of the home cooking appliance, one or more cooling fans or blowers of a cooling air system of the home cooking appliance may draw cooler air into the housing of the appliance from areas outside of the appliance and convey this lower temperature air (i.e., cooling air) through, for example, the space between a top insulation retainer of a cooking compartment (such as a baking oven, convection oven, steam oven, warming drawer, etc.) of the appliance and a chassis floor of the cooktop. In this way, a quantity of heat from components of the appliance, such as components of the cooking compartment, can be transferred to the cooling air, which can then be exhausted from the appliance by the cooling fan.
The present invention recognizes that, in some instances, for example when a cooling fan is operating at a maximum rate, the fan may draw a large enough volume of air through the range that air from the space between the cooktop and the chassis floor, which is used as primary air by the bottom-breathing gas burners for mixing with fuel, can be undesirably drawn through holes, gaps, etc. in the chassis floor toward the fan/blower, which may decrease the performance of the bottom-breathing gas burners. For example, the fan may draw a large enough volume of air from the space between the cooktop and the chassis floor such that insufficient air is available for use as primary air by the bottom-breathing gas burners for mixing with fuel or such that a flow of the air and/or fuel into a venturi of one or more burners is disrupted, among other things, which may decrease the performance of one or more of the cooktop burners, affect the stability of flame kernels of one or more burners, etc.
To solve these and other problems, the present invention provides a home cooking appliance comprising a housing, a cooktop on the housing, the cooktop having at least one gas burner, a cooking compartment in the housing and accessible through a door in a front of the housing, a cooling air system having a cooling fan that conveys cooling air through the housing, and an air guide between the cooktop and the cooking compartment, the air guide including an inlet located away from a space below the at least one gas burner of the cooktop and an outlet in fluid communication with the cooling fan, the air guide configured to restrict air from being drawn into the cooling fan from the space below the at least one gas burner of the cooktop. In this way, the present invention provides a home cooking appliance having an air guide capable of restricting (e.g., preventing or minimizing) air from the space between the cooktop and the chassis floor from being drawn into the fan, thereby avoiding disruption of air in the space between the cooktop and the chassis floor that is available for use as primary air by the burners, stabilizing burner flames, and increasing overall burner performance.
An exemplary embodiment of the invention provides an air guide that forms a designated air duct in a simple manner that is capable of controlling, or at least constraining or limiting, a flow of air being drawn toward or into the cooling fan such that the cooling fan can only draw air through areas of the appliance housing at, near, or adjacent to a front frame of the housing and not through the chassis floor from the space between the cooktop and the chassis floor. The exemplary embodiments can control the flow of air though the appliance in order to increase the cooktop burner performance By isolating the air which the fan draws through the appliance, the air which the burners need to function properly can be left undisturbed. The exemplary embodiments of an air guide can provide these benefits without affecting thermal test results which are important (e.g., critical) to the safety of an appliance, such as an oven range. The minimalistic air guide according to the exemplary embodiments can be compatible and effective across various models and configurations of appliances, such as stand-alone ranges, thereby providing a functional, versatile, and efficient solution for controlling, or at least constraining or limiting, a flow of air being drawn toward or into one or more cooling fans from the space between the cooktop and the chassis floor, thereby increasing the performance and efficiency of gas cooktop burners on the appliance.
In some examples, an air guide can form a designated air duct that is capable of restricting or limiting the amount of air being drawn toward or into a cooling fan from the space between the cooktop and the chassis floor. For example, the air guide can form a designated air duct that restricts the amount of air from the space between the cooktop and the chassis floor that can be drawn toward or into a cooling fan, for example, with the exception of minor leaks of air around or between connections of the air guide to other components. In other examples, an air guide can form a sealed air flow duct that is capable of isolating (e.g., completely isolating) a flow of air being drawn toward or into a cooling fan from the air in the space between the cooktop and the chassis floor. For example, the air guide can form a sealed air duct configured to prevent any air from the space between the cooktop and the chassis floor from being drawn into the cooling fan.
The exemplary embodiments of the air guide can be configured in a simple manner that minimizes complexity of parts. The air guide can be configured such that a part or element of the air guide forms a designated air duct between at least a portion of the chassis floor and a top of the cooking compartment, and more particularly, between at least a portion of the chassis floor and a top insulation retainer above a cooking compartment. The air guide can be configured to separately form an air duct or to cooperate with one or more other components, such as a portion of the top insulation retainer, to form an air duct.
In an exemplary embodiment, the air guide can include a top wall and two sidewalls that cooperate with the top insulation retainer to form an air duct. In an example, the air guide can include one or more portions, such as one or more flanges, configured to couple the air guide to a component of the appliance, such as the top insulation retainer. Each flange can be coupled to the top insulation retainer, for example, by one or more fasteners, such as one or more rivets. In these ways, the exemplary embodiments can minimize noise transmission from the cooling fan to the air guide or from the air flow through the duct to other components of the appliance, while also creating as close to a sealed air flow duct as possible between the air guide and the top insulation retainer.
In some examples, the air guide can be configured such that a predetermined clearance is provided between a top surface of the air guide and an underside of the chassis floor, which may minimize noise transmission from the air guide to the chassis floor or other components of the appliance.
In some examples, the air guide can be configured such that a part or element of the air guide (e.g., a downstream end of the air guide adjacent to the cooling fan) is essentially hung off of a part of the cooling fan, such as a structural component or part of a housing of the cooling fan, and fit (e.g., snugly fit) between the chassis floor and a top insulation retainer. In an example, the air guide can include a flange on an upper part that is configured to provide a secure press fit against a part of the cooling fan, such as a structural component or part of a housing of the cooling fan. In an example embodiment, the cooling fan can include a separate or integrally formed component configured to receive the flange of the air guide such that the flange can be simply and easily secured (e.g., in a press fit manner) on the component of the cooling fan. For example, the cooling fan can include a lip, flange, tab, or the like, on a structural cross member of the fan or the housing of the fan configured to receive an end of the flange of the air guide to secure (e.g., in a press fit manner) the air guide to the cooling fan. In this way, the air guide can be coupled or secured to the cooling fan (e.g., a top flange of the air guide can be coupled to a lip on a structural cross member of the cooling fan), thereby minimizing noise or vibration, while also creating as close to a sealed air flow duct as possible between the air guide and the cooling fan.
In some examples, the air guide can be configured such that a part or element of the air guide (e.g., a downstream end of the air guide adjacent to the cooling fan) extends from the air guide such that the air can flow unrestricted into the intake of the cooling fan. The downstream part or element of the air guide can be formed by one or more angled plates or flanges (or curved plates, flanges, or the like) and can include a flange configured to provide a secure press fit against a part of the cooling fan. The downstream part or element of the air guide can be configured to further constrain or minimize air from the space between the cooktop and the chassis floor from being drawn into the fan through other components of the appliance, such as through openings, gaps, etc. formed in a sidewall of the cooktop chassis or other structural or sheet metal components between the cooling fan and the space below the cooktop. In some examples, the air guide can be configured such that a predetermined clearance is provided between the downstream part or element of the air guide and a sidewall of the cooktop chassis or other structural or sheet metal components, which may minimize noise transmission to the cooktop chassis or other components of the appliance. In some examples, the downstream part or element of the air guide can include one or more cutouts, tapered or angled portions, etc. to facilitate installation and provide clearance between the air guide and the sidewall of the cooktop chassis, other structural or sheet metal components of the appliance, or functional components of the appliance (e.g., gas supply lines, electrical components, etc.).
Other features and advantages of the present invention will become apparent to those skilled in the art upon review of the following detailed description and drawings.
These and other aspects and features of embodiments of the present invention will be better understood after a reading of the following detailed description, together with the attached drawings, wherein:
The present invention now is described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
With reference to
As shown in
One or more of the gas burners 108 can be configured as a bottom-breathing gas burner. In operation, a bottom-breathing gas burner 108 may draw air (e.g., primary air A1) from a space below the cooktop floor 109 and between the cooktop floor 109 supporting the gas burner 108 and a chassis floor 124 of the cooktop. The bottom-breathing gas burner 108 can mix the primary air A1 with fuel (e.g., gas) to supply an air-gas mixture to a burner head of a gas burner 108.
The home cooking appliance 100 can include a cooling air system having one or more cooling fans or blowers 114 configured to draw cooler air into the appliance 100 from areas outside of the appliance 100 such as from openings in or around the door 104, openings in or around a front frame or other part of the housing 102, etc. The cooling fan 114 of the cooling air system can convey this lower temperature air (i.e., cooling air) through various interior areas of the door 104 and/or the housing 102, and then exhaust the air from the housing 102 from one or more locations, such as from the rear vent trim 116, in order to maintain acceptable surface temperatures and oven door temperatures, to protect components in and around the appliance, etc. For example, a cooling fan 114 can be disposed toward a rear of the housing 102 and above a cooking compartment 110. The cooling fan 114 can be configured to draw cooler air into the appliance 100 from areas outside of the appliance 100 and convey the cooler air through the space between the cooking compartment 110 and the cooktop floor 109. In this way, a quantity of heat from components of the appliance, such as heat from the operation of the cooking compartment 110, can be transferred to the cooler air being drawn through the appliance 100 by the cooling fan 114. The cooling fan 114 then can exhaust the now heated air (e.g., A3) from one or more openings in the rear vent trim 116. In some examples, the appliance 100 can include a plurality of cooking compartments 110 and one or more cooling fans 114 can be provided for the cooking compartments 110, such as a corresponding cooling fan 114 for each cooking compartment 110. One of ordinary skill will recognize that a cooling fan 114 can circulate cooling air of a cooling air system for cooling components of one or more cooking compartments 110.
The present invention recognizes that, when a cooling fan 114 is operating, for example at a maximum flow rate, the cooling fan 114 may be capable of drawing a larger volume of air through the housing 102 than can be conveyed to the cooling fan 114 through, for example, a space between the top insulation retainer 122 and the chassis floor 124 of the cooktop. In some circumstances, the cooling fan 114 may additionally draw air A1 from the space between the cooktop floor 109 and the chassis floor 124 through one or more openings, perforations, cut-outs, knock-outs, etc. 401 in the chassis floor 124, chassis sidewall 126, or another component, and/or through gaps between parts of the chassis floor 124, chassis sidewall 126, or other components, as schematically illustrated in
For example, as shown in
With reference to
With reference to
As shown in
As explained, the appliance 100 can include a plurality of cooking compartments 110 and one or more cooling fans 114 can be provided for the cooking compartments 110. A single cooling fan 114 can circulate cooling air of a cooling air system for one or more cooking compartments 110. In other examples, the appliance 100 can include a plurality of cooling fans 114. For example, a cooling fan 114 can be provided for each of a plurality of cooking compartments 110. According to the exemplary embodiments of the invention, the appliance 100 can include a plurality of air guides 300, such as a corresponding air guide 300 for each cooling fan 114.
Referring to
As shown in the example assemblies illustrated in
In another exemplary embodiment, as illustrated in
With reference again to
As shown in the assembled embodiments illustrated in
Referring again to
With reference again to the assembled embodiments illustrated in
As explained with reference to
With reference again to
The present invention has been described herein in terms of several preferred embodiments. However, modifications and additions to these embodiments will become apparent to those of ordinary skill in the art upon a reading of the foregoing description. It is intended that all such modifications and additions comprise a part of the present invention to the extent that they fall within the scope of the several claims appended hereto.
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