Cooking appliance with steam generator and ventilation system
The microwave oven's steam generator and ventilation system effectively manage steam flow using a vent flap and fan mechanism, improving cooking quality and reducing condensation and odor by retaining steam within the cavity.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- WHIRLPOOL CORP
- Filing Date
- 2024-12-27
- Publication Date
- 2026-07-02
AI Technical Summary
Managing steam and ventilation within microwave ovens to prevent steam leakage and condensation, which can affect surrounding items and environments.
A microwave oven with a steam generator and ventilation system that includes a vent flap and fan mechanism controlled by a controller to manage steam flow, allowing selective activation and deactivation based on steam generator activity.
Enhances cooking quality by retaining steam within the cavity, maintaining humidity, and reducing energy consumption while minimizing condensation and odor buildup.
Smart Images

Figure CN2024143362_02072026_PF_FP_ABST
Abstract
Description
COOKING APPLIANCE WITH STEAM GENERATOR AND VENTILATION SYSTEMBACKGROUND OF THE DISCLOSUREThe present invention relates generally to cooking appliances with steam cooking functionality, and more particularly to a microwave oven equipped with a steam generator and a ventilation system.Microwave ovens are widely used for cooking and heating food. Incorporating steam into the cooking process can enhance the quality of the cooked food by maintaining moisture and improving texture. However, managing steam and ventilation within the microwave oven presents challenges. In particular, during steam cooking within a microwave (or other appliances that incorporate steam cooking) , some steam may leak from out of the appliance, including via an exhaust duct associated with the cooking cavity, which can cause undesirable condensation in the area surrounding the appliance, or may adversely affect surrounding items, including adjacent cabinetry.SUMMARY OF THE DISCLOSUREAccording to one aspect of the present disclosure, a microwave oven includes an outer housing defining a vent outlet and an inner liner defining a cooking cavity and a steam inlet and a vent inlet. The outer housing and the inner liner defining a mechanical room therebetween. The microwave oven also includes a steam generator mounted within the mechanical room and fluidly connected with the steam inlet for providing steam to the cooking cavity via the steam inlet and a vent duct extending from the vent inlet of the inner liner to the vent outlet. A vent flap is positioned within the vent duct and is moveable between a closed position and an open position. The microwave oven further includes a fan in fluid communication with a portion of the vent duct between the vent inlet and the vent outlet and a controller for causing selective activation and deactivation of the steam generator. The controller further activates the fan and causes movement of the vent flap into the closed position when the steam generator is active and deactivates the fan and causes movement of the vent flap into the open position when the steam generator is inactive.According to another aspect of the present disclosure, a steam cooking assembly for use in a cooking appliance includes a steam generator coupled with a steam supply line having an output end configurable for providing steam to a steam inlet of the appliance and a vent duct extending from an inlet end to an outlet end. A vent flap is positioned within the vent duct and is moveable between a closed position and an open position. The assembly further includes a fan in fluid communication with a portion of the vent duct between the inlet end and the outlet end and a controller for causing selective activation and deactivation of the steam generator. The controller further activates the fan while causing movement of the vent flap into the closed position, when the steam generator is active, and deactivates the fan while causing movement of the vent flap into the open position, when the steam generator is inactive.According to yet another aspect of the present disclosure, a cooking appliance includes an outer housing defining a vent outlet and an inner liner defining a cooking cavity, a steam inlet, and a vent inlet. The outer housing and the inner liner define a mechanical room therebetween. A primary heat source is operable to provide cooking heat to the cooking cavity. A steam generator is mounted within the mechanical room and is fluidly connected with the steam inlet for providing steam to the cooking cavity via the steam inlet. The appliance further includes a vent duct extends from the vent inlet of the inner liner to the vent outlet. A vent flap is positioned within the vent duct and moveable between a closed position and an open position. The appliance further includes a fan in fluid communication with a portion of the vent duct between the vent inlet and the vent outlet and operable when the vent flap is in the closed position to cool steam passing the vent flap within the vent duct.These and other features, advantages, and objects of the present disclosure will be further understood and appreciated by those skilled in the art by reference to the following specification, claims, and appended drawings.BRIEF DESCRIPTION OF THE DRAWINGSIn the drawings:FIG. 1 is a is a perspective view of a cooking appliance according to an aspect of the disclosure microwave oven;FIG. 2 is a is a perspective view of the cooking appliance shown with a door thereof in an open position;FIG. 3 is a back perspective view of the cooking appliance showing various internal components thereof;FIG. 4 is a further perspective view showing additional internal components of the cooking appliance;FIG. 5 is a cross-sectional view of the cooking appliance showing a vent duct incorporated therein;FIG. 6 is a detailed perspective view of a portion of the cooking appliance, showing a vent flap in an open position;FIG. 7 is a detailed perspective view of a portion of the cooking appliance, showing the vent flap in a closed position; andFIG. 8 is a detailed view showing operation of an actuator in moving the vent flap between the open and closed positions.The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles described herein.DETAILED DESCRIPTIONThe present illustrated embodiments reside primarily in combinations of method steps and apparatus components related to a cooking appliance. Accordingly, the apparatus components and method steps have been represented, where appropriate, by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein. Further, like numerals in the description and drawings represent like elements.For purposes of description herein, the terms "upper, " "lower, " "right, " "left, " "rear, " "front, " "vertical, " "horizontal, " and derivatives thereof shall relate to the disclosure as oriented in FIG. 1. Unless stated otherwise, the term "front" shall refer to the surface of the element closer to an intended viewer, and the term "rear" shall refer to the surface of the element further from the intended viewer. However, it is to be understood that the disclosure may assume various alternative orientations, except where expressly specified to the contrary. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.The terms "including, " "comprises, " "comprising, " or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element preceded by "comprises a ... " does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.Ordinal modifiers (i.e., “first” , “second” , etc. ) may be used to distinguish between various structures of a disclosed article in various contexts, but such ordinals are not necessarily intended to apply to such elements outside of the particular context in which they are used and that, in various aspects different ones of the same class of elements may be identified with the same, context-specific ordinal. In such instances, other particular designations of the elements are used to clarify the overall relationship between such elements. Ordinals are not used to designate a position of the elements, nor do they exclude additional, or intervening, non-ordered elements or signify an importance or rank of the elements within a particular class.For purposes of this disclosure, the term "coupled" (in all of its forms, couple, coupling, coupled, etc. ) generally means the joining of two components (electrical or mechanical) directly or indirectly to one another. Such joining may be stationary in nature or movable in nature. Such joining may be achieved with the two components (electrical or mechanical) and any additional intermediate members being integrally formed as a single unitary body with one another or with the two components. Such joining may be permanent in nature or may be removable or releasable in nature unless otherwise stated.For purposes of this disclosure, the terms “about” , “approximately” , or “substantially” are intended to mean that a value of a parameter is close to a stated value or position. However, minor differences may prevent the values or positions from being exactly as stated. Thus, unless otherwise noted, differences of up to ten percent (10%) for a given value are reasonable differences from the ideal goal of exactly as described. In many instances, a significant difference can be when the difference is greater than ten percent (10%) , except as where would be generally understood otherwise by a person of ordinary skill in the art based on the context in which such term is used.Referring to FIGS. 1-7, reference numeral 10 generally designates a cooking appliance 10. The cooking appliance 10 includes an outer housing 12 defining a vent outlet 14 and an inner liner 16 defining a cooking cavity 18 with a steam inlet 20, and a vent inlet 22. The outer housing 12 and the inner liner 16 define a mechanical room 24 therebetween. A primary heat source 26 is operable to provide cooking heat to the cooking cavity 18. Each of the steam generator 30, the vent duct 40, the vent fan 48, and the controller 62 can be mounted in the mechanical room 24 at various desired locations.As shown more specifically in FIG. 4, the cooking appliance 10 incorporates a steam cooking assembly 28. The steam cooking assembly 28 includes a steam generator 30 coupled with a steam supply line 32 having an output end 34 configurable for providing steam to the steam inlet 20 of the appliance 10. The steam generator 30 is mounted within the mechanical room 24 and fluidly connected with the steam inlet 20 for providing steam to the cooking cavity 18 via the steam inlet 20. The steam generator 30 includes a heater 36 and a water supply 38 fluidly coupled with the heater 36 to generate steam. The steam cooking assembly 28 further includes a vent duct 40 extending from the vent inlet 22 of the inner liner 16 to the vent outlet 14. A vent flap 42 is positioned within the vent duct 40 and is moveable between a closed position (as shown in FIG. 7) and an open position (as shown in FIG. 6) . When the vent flap 42 is in the closed position (FIG. 7) , a fluid flow through the vent is at least partially blocked, and when the vent flap 42 is in the open position (FIG. 6) , the fluid flow through the vent is permitted. The steam cooking assembly 28 also includes a fan 48 in fluid communication with a portion of the vent duct 40 between the vent inlet 22 and the vent outlet 14. A controller 62 is provided for causing selective activation and deactivation of the steam generator 30. The controller 62 further activates the fan 48 and causes movement of the vent flap 42 into the closed position (FIG. 7) when the steam generator 30 is active and deactivates the fan 48 and causes movement of the vent flap 42 into the open position (FIG. 6) when the steam generator 30 is inactive.In at least one aspect, the cooking appliance 10 can be a microwave oven, as shown in the figures. In this respect, the primary heat source 26 can be a microwave generator positioned below or otherwise just outside of the inner liner 16 within the mechanical room 24. It is noted that the steam cooking assembly 28 discussed herein can be incorporated into other types of cooking appliances, including conventional ovens, in which the primary heat source can be an electric heating element, a gas burner, or any other suitable type of heat source, as well as a countertop toaster or convection oven. As shown in the system-level view of FIG. 4, the microwave oven 10 can also include a secondary heat source 27 in the form of a convection unit having an electrical (resistance) heating element and a convection fan. The primary heat source 26 and secondary heat source 27 can be used in various combinations, including combinations that further incorporate the use of the steam generator 30, according to various cooking modes that can be selected by the user and implemented by the controller 62.Continuing with respect to FIG. 4, the heater 36 can be an electric resistance heater or any other suitable type of heater capable of rapidly heating water to produce steam. The heater 36 is in communication with the water supply 38 to receive water to be heated. In the illustrated assembly 28, the water supply 38 includes a tank 44, removably received in an open portion of the mechanical room 24, connected with a pump 46 by a segment of supply line 47. In other aspects, the water supply can include an external connection to a household water source and a regulator. As shown, the pump 46 connects via the supply line 47 to the heater 36, which is further connected to the steam inlet 20, which is coupled with the inner liner 16 along a lower portion thereof. Both the pump 46 and heater 36 can be connected with the controller 62 for activation and deactivation of the steam functionality, as needed or desired. The controller 62 can be a microprocessor-based control unit with software programmed to manage the operation of the steam generator 30, the fan 48, the vent flap 42, etc.. The controller 62 can be a part of a control unit positioned within a separate housing in the mechanical room 24 that can also enclose other electronic components associated with the microwave oven 10. The controller 62 can also be operably associated with various sensors to monitor the temperature and humidity within the cooking cavity 18 and adjust the operation of the steam generator 30 (and, optionally, the secondary heat source 27) during use thereof.The vent duct 40 is incorporated into the cooking appliance 10 to provide for the exhaust of steam and other gases that may be produced during cooking food products using primary heat source 26 (i.e., food produced by cooking and not introduced by steam cooking assembly 28) from the cooking cavity 18 to the exterior of the cooking appliance 10. The vent duct 40 can be made of a heat-resistant material to withstand the temperatures of such gasses and generally resulting from the exposure to the cooking cavity 18. As shown, the vent duct 40 extends from a vent inlet end 50 positioned adjacent the vent inlet 22 of the inner liner 16, which may be generally centrally disposed within the upper surface 64 thereof and may include an arrangement of perforations therein. From the vent inlet 22, the vent duct defines a generally closed conduit (except with respect to incorporation of the fan 48, as discussed below) that extends to a vent outlet end 58 positioned the general location of the vent outlet 14. In this respect, it is noted that the vent outlet 14 may be positioned behind a large cover that may provide a cosmetic covering for one or more additional inlets or outlets used in connection with other systems or components of the cooking appliance 10, including but not limited to providing an inlet for the cooling fan 68 that is positioned adjacent the controller 62 and provides cooling therefor, along with cooling of the primary heat source 26, when in the form of the above-mentioned microwave generator.The vent flap 42 operates to help manage the flow of steam and air within the vent duct 40. The vent flap 42 is positioned within the vent duct 40 and is moveable between two primary positions: a closed position (FIG. 7) and an open position (FIG. 6) . The movement of the vent flap 42 is controlled by the linear actuator 60. When the vent flap 42 is in the open position, it allows fluid flow through the vent duct 40, as discussed above. This position is implemented when the steam generator 30 is inactive. As discussed above, when steam cooking is not used, proper ventilation and moisture management is desired to help protect internal components from damage caused by excessive humidity and heat, extending the lifespan of the appliance 10.When the vent flap 42 is in the closed position, it partially or fully blocks the fluid flow through the vent duct 40. This position is typically activated when the steam generator 30 is active. The controller 62 sends a signal to the linear actuator 60 to move the vent flap 42 into the closed position. Blocking the vent duct 40 helps to retain steam within the cooking cavity 18, enhancing the steam cooking process by maintaining higher humidity levels. The use of a vent flap 42 in a microwave oven 10 with a steam generator 30 can help enhance cooking quality by retaining steam within the cooking cavity 18 when the steam generator 30 is active, which helps maintain higher humidity levels and improves the texture and moisture of the food being cooked. This efficient steam utilization reduces the need for continuous steam generation, conserving energy. By closing the vent flap 42 during steam generation, heat loss is minimized, allowing the microwave oven 10 to maintain the desired cooking temperature more effectively. As discussed further below, the vent flap 42 can also be configured to help regulate the pressure within the cooking cavity 18, preventing excessive pressure buildup.As shown in the cross-section view of FIGS. 5-7, the vent flap 42 is positioned adjacent a sealing flange 70 that encircles the interior of the vent duct 40. The vent flap 42 can abut the sealing flange 70 when in the closed position (FIG. 7) . In this respect, it is noted that the sealing flange 70 and the vent flap 42 can be made of rigid materials such that the vent flap 42 does not achieve a compressive seal against the sealing flange 70. Accordingly, the closure of the vent flap 42 may not completely seal against movement of steam upstream of the vent flap 42 within the vent duct 40. Although the closure of the vent flap 42 in this manner is intended to retain steam within the cooking cavity 18 such that the desired effects of steam cooking using the steam generator 30 are achieved, it may be acceptable or desirable for some steam to leak past the vent flap 42 to escape from the cooking cavity 18 and to be vented from the cooking appliance 10 via the vent outlet 14. In one respect, this may prevent pressure build up within the cooking cavity 18. As noted above, however, it may be undesirable to subject objects adjacent the cooking appliance 10 to high-temperature steam, particularly in the case of a built-in cooking appliance, such as that which is depicted in the figures, which can be positioned adjacent cabinetry or other somewhat sensitive items. The vent flap 42 can be made of a durable material such as stainless steel or a high-temperature plastic so that it can withstand being frequently subject to high temperature steam while maintaining the ability to occlude the vent duct, when desired.In one example, the movement of the vent flap 42 between the open position and the closed position can be achieved by a linear actuator 60 included in the steam cooking assembly 28 and mounted within the mechanical room 24. In the example shown in FIG. 8, the linear actuator 60 is operably coupled with the vent flap 42 by way of an arm 72 that is contacted by an operative end 74 of the actuator for causing movement of the vent flap 42 between the open position (FIG. 6) and the closed position (FIG. 7) . The linear actuator 60 can be an electric motor with a screw drive, a pneumatic actuator, a wax motor or any other suitable type of actuator capable of precisely controlling the position of the vent flap 42. In the example shown, the actuator 60 is configured such that the inactive state thereof corresponds with the open position of the vent flap 42, with activation of the actuator 60 causing movement into the closed position and retention in such position as long as the actuator 60 is active. In other examples, the position of the vent flap 42 can be controlled by a rotational motor or actuator or other suitable devices.As discussed above, the vent fan 48 can be used to cool the steam that may leak or otherwise pass the vent flap 42 when in the closed position. In one respect this cooling may prevent the steam from being exhausted out of the vent outlet 14, while still allowing escape thereof from the cooking cavity 18 by causing the steam to condense within the vent duct 40. This can reduce or eliminate the effect of such steam escaping into the kitchen environment . In other respects, the use of the vent fan 48 can be sufficient to cool the steam to an extent that adverse effects are minimized or reduced to a more acceptable level. In some aspects, the use of the vent fan 48 can achieve one or both effects at various points or combinations, depending on the specific operating conditions and use of the steam generator 30. In an implementation where the fan 48 is operable to cool the steam to cause condensation within the vent duct 40, the condensation can be collected and drained away through a drain channel or returned to the water supply tank 44 of the steam generator 30.The vent duct 40 can define a fan aperture 56 between the vent flap 42 and the vent duct outlet end 58, allowing the fan 48 to draw air and steam through the vent duct 40. The fan 48 is in fluid communication with a portion of the vent duct 40 between the vent inlet 22 and the vent outlet 14. When the vent flap 42 is in the closed position, the fan 48 can be activated to introduce air into the vent duct 40, cooling the steam and causing condensation within the duct. In one implementation, the vent fan 48 can be operated to draw ambient air in from within the mechanical room 24 and direct the air through fan aperture 56 into the vent duct 40. In this respect, the cooling fan 68 can operate to introduce air from outside of the outer housing 12 to the mechanical room 24 and to cause circulation of air therein. In another example, the fan 48 can be configured to draw ambient air in from the vent outlet end 58 back through the vent outlet and into the vent duct 40 before being exhausted into the mechanical room 24. The fan 48 can be an axial fan, a centrifugal fan, or any other type of fan suitable for moving air into and through the vent duct 40. The fan 48 is mounted in a fan housing 52 having a first opening 54 and coupled with the vent duct 40 at the fan aperture 56. The fan housing 52 can be designed to minimize noise and vibration during operation.In one respect, the controller 62 can be configured to activate the vent fan 48 whenever the steam generator 30 is in use. In another implementation, either or both of a temperature sensor or a moisture sensor can be mounted in the vent duct 40 and in communication with the controller 62 so that the controller 62 can selectively activate or deactivate the vent fan 48, when needed, such as when steam or excessive heat is present within the vent duct 40 while the steam generator 30 is in use. In such an implementation, the controller 62 can also control the speed of the fan 48 to achieve and maintain the desired effects thereof, depending on the amount of steam leaking through the vent flap 42.The controller 62 can be configured to send a signal to the linear actuator 60 to move the vent flap 42 into the open position upon deactivation of the steam generator 30. This can occur at various intervals of a steam cooking cycle, depending on the particular configuration of the cycle. In a further aspect, controller 62 can open the vent flap 42 at the end of a cooking cycle using steam to allow the steam to escape through the vent outlet 14 before the door is opened, with the vent fan 48 being be run for a predetermined or controlled interval to cool the steam for venting thereof at a reduced temperature compared to what would result from allowing the steam to escape through the open microwave door. In general, opening the vent duct 40 allows steam and other gases to be vented out of the cooking cavity 18, which helps to clear the cavity of excess moisture and odors after cooking. Secondly, the vent flap 42 allows for controlled ventilation of steam and other gases. When the steam generator 30 is inactive, opening the vent flap 42 helps to vent excess moisture and odors from the cooking cavity 18, maintaining a balanced environment and reducing lingering odors inside the microwave oven 10. Secondly, the vent flap 42 allows for controlled ventilation of steam and other gases. When the steam generator 30 is inactive, opening the vent flap 42 helps to vent excess moisture and odors from the cooking cavity 18, maintaining a balanced environment and reducing lingering odors inside the microwave oven10.The invention disclosed herein is further summarized in the following paragraphs and is further characterized by combinations of any and all of the various aspects described therein.According to another aspect of the present disclosure, a microwave oven includes an outer housing defining a vent outlet and an inner liner defining a cooking cavity and a steam inlet and a vent inlet. The outer housing and the inner liner defining a mechanical room therebetween. The microwave oven also includes a steam generator mounted within the mechanical room and fluidly connected with the steam inlet for providing steam to the cooking cavity via the steam inlet and a vent duct extending from the vent inlet of the inner liner to the vent outlet. A vent flap is positioned within the vent duct and is moveable between a closed position and an open position. The microwave oven further includes a fan in fluid communication with a portion of the vent duct between the vent inlet and the vent outlet and a controller for causing selective activation and deactivation of the steam generator. The controller further activates the fan and causes movement of the vent flap into the closed position when the steam generator is active and deactivates the fan and causes movement of the vent flap into the open position when the steam generator is inactive.In the microwave oven of
[0036] , the fan can be in fluid communication with a portion of the vent duct between the vent flap and the vent outlet.In the microwave oven of
[0037] , the vent duct can define a fan aperture between the vent flap and the vent outlet, and the fan can be mounted in a fan housing having a first opening and coupled with the vent duct with the first opening.In the microwave oven of
[0036] or
[0037] , the fan can be configured to draw ambient air in from the vent opening to the vent duct.In the microwave oven of
[0036] ,
[0037] , or
[0039] , the fan can be configured to draw ambient air from within the mechanical room into the vent duct.In the microwave oven of
[0036] ,
[0037] ,
[0039] , or
[0040] , when the vent flap is in the closed position, a fluid flow through the vent can be at least partially blocked, and when the vent flap is in the open position, the fluid flow through the vent can be permitted.The microwave oven of
[0036] ,
[0037] ,
[0039] ,
[0040] , or
[0041] can further include a linear actuator mounted within the mechanical room and operably coupled with the vent flap for causing movement thereof between the open position and the closed position.In the microwave oven of
[0036] ,
[0037] ,
[0039] , or
[0040] -
[0042] , the steam generator can include a heater and a water supply fluidly coupled with the heater.In the microwave oven of
[0036] ,
[0037] ,
[0039] , or
[0040] -
[0043] , each of the steam generator, the vent duct, the vent fan, and the controller can be mounted in the mechanical room.In the microwave oven of
[0036] ,
[0037] ,
[0039] , or
[0040] -
[0044] , the vent fan can be operable to cool steam passing the vent flap within the vent duct.In the microwave oven of
[0045] , the vent fan can be operable to cool steam passing the vent flap within the vent duct to cause condensation thereof within the vent duct.According to another aspect of the present disclosure, a steam cooking assembly for use in a cooking appliance includes a steam generator coupled with a steam supply line having an output end configurable for providing steam to a steam inlet of the appliance and a vent duct extending from an inlet end to an outlet end. A vent flap is positioned within the vent duct and is moveable between a closed position and an open position. The assembly further includes a fan in fluid communication with a portion of the vent duct between the inlet end and the outlet end and a controller for causing selective activation and deactivation of the steam generator. The controller further activates the fan while causing movement of the vent flap into the closed position, when the steam generator is active, and deactivates the fan while causing movement of the vent flap into the open position, when the steam generator is inactive.In the steam cooking assembly of
[0047] , the fan is in fluid communication with a portion of the vent duct between the vent flap and the outlet end.In the steam cooking assembly of
[0048] , the vent duct can define a fan aperture between the vent flap and the outlet end, and the fan can be mounted in a fan housing having a first opening and coupled with the vent duct with the first opening.In the steam cooking assembly of
[0047] -
[0049] , when the vent flap is in the closed position, a fluid flow through the vent can be at least partially blocked, and when the vent flap is in the open position, the fluid flow through the vent can be permitted.The steam cooking assembly of
[0047] -
[0050] , can include a linear actuator mounted within the mechanical room and operably coupled with the vent flap for causing movement thereof between the open position and the closed position.In the steam cooking assembly of
[0047] -
[0051] , the steam generator can include a heater and a water supply fluidly coupled with the heater.In the steam cooking assembly of
[0047] -
[0052] , the vent fan can be operable to cool steam passing the vent flap within the vent duct.In the steam cooking assembly of
[0053] , wherein the vent fan can be operable to cool steam passing the vent flap within the vent duct to cause condensation thereof within the vent duct.According to another aspect of the present disclosure, a cooking appliance includes an outer housing defining a vent outlet and an inner liner defining a cooking cavity, a steam inlet, and a vent inlet. The outer housing and the inner liner define a mechanical room therebetween. A primary heat source is operable to provide cooking heat to the cooking cavity. A steam generator is mounted within the mechanical room and is fluidly connected with the steam inlet for providing steam to the cooking cavity via the steam inlet. The appliance further includes a vent duct extends from the vent inlet of the inner liner to the vent outlet. A vent flap is positioned within the vent duct and moveable between a closed position and an open position. The appliance further includes a fan in fluid communication with a portion of the vent duct between the vent inlet and the vent outlet and operable when the vent flap is in the closed position to cool steam passing the vent flap within the vent duct.It will be understood by one having ordinary skill in the art that construction of the described disclosure and other components is not limited to any specific material. Other exemplary embodiments of the disclosure disclosed herein may be formed from a wide variety of materials, unless described otherwise herein.It is also important to note that the construction and arrangement of the elements of the disclosure as shown in the exemplary embodiments is illustrative only. Although only a few embodiments of the present innovations have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc. ) without materially departing from the novel teachings and advantages of the subject matter recited. For example, elements shown as integrally formed may be constructed of multiple parts or elements shown as multiple parts may be integrally formed, the operation of the interfaces may be reversed or otherwise varied, the length or width of the structures and / or members or connector or other elements of the system may be varied, the nature or number of adjustment positions provided between the elements may be varied. It should be noted that the elements and / or assemblies of the system may be constructed from any of a wide variety of materials that provide sufficient strength or durability, in any of a wide variety of colors, textures, and combinations. Accordingly, all such modifications are intended to be included within the scope of the present innovations. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the desired and other exemplary embodiments without departing from the spirit of the present innovations.It will be understood that any described processes or steps within described processes may be combined with other disclosed processes or steps to form structures within the scope of the present disclosure. The exemplary structures and processes disclosed herein are for illustrative purposes and are not to be construed as limiting.
Claims
1.A microwave oven, comprising:an outer housing defining a vent outlet;an inner liner defining a cooking cavity and a steam inlet and a vent inlet, the outer housing and the inner liner defining a mechanical room therebetween;a steam generator mounted within the mechanical room and fluidly connected with the steam inlet for providing steam to the cooking cavity via the steam inlet;a vent duct extending from the vent inlet of the inner liner to the vent outlet, a vent flap being positioned within the vent duct and moveable between a closed position and an open position;a fan in fluid communication with a portion of the vent duct between the vent inlet and the vent outlet; anda controller for causing selective activation and deactivation of the steam generator, the controller further:activating the fan and causing movement of the vent flap into the closed position when the steam generator is active; anddeactivating the fan and causing movement of the vent flap into the open position when the steam generator is inactive.2.The microwave oven of claim 1, wherein the fan is in fluid communication with a portion of the vent duct between the vent flap and the vent outlet.3.The microwave oven of claim 2, wherein:the vent duct defines a fan aperture between the vent flap and the vent outlet; andthe fan is mounted in a fan housing having a first opening and coupled with the vent duct with the first opening.4.The microwave oven of any one of claims 1 to 3, wherein the fan is configured to draw ambient air in from the vent outlet to the vent duct.5.The microwave oven of any one of claims 1 to 3, wherein the fan is configured to draw ambient air from within the mechanical room into the vent duct.6.The microwave oven of claim 1, wherein:when the vent flap is in the closed position, a fluid flow through the vent duct is at least partially blocked; andwhen the vent flap is in the open position, the fluid flow through the vent duct is permitted.7.The microwave oven of claim 1 or claim 6, further including a linear actuator mounted within the mechanical room and operably coupled with the vent flap for causing movement thereof between the open position and the closed position.8.The microwave oven of claim 1, wherein the steam generator includes a heater and a water supply fluidly coupled with the heater.9.The microwave oven of claim 1 or claim 8, wherein each of the steam generator, the vent duct, the vent fan, and the controller are mounted in the mechanical room.10.The microwave oven of claim 1, wherein the vent fan is operable to cool steam passing the vent flap within the vent duct.11.The microwave oven of claim 10, wherein the vent fan is operable to cool steam passing the vent flap within the vent duct to cause condensation thereof within the vent duct12.A steam cooking assembly for use in a cooking appliance, comprising:a steam generator coupled with a steam supply line having an output end configurable for providing steam to a steam inlet of the appliance;a vent duct extending from an inlet end to an outlet end, a vent flap being positioned within the vent duct and moveable between a closed position and an open position;a fan in fluid communication with a portion of the vent duct between the inlet end and the outlet end; anda controller for causing selective activation and deactivation of the steam generator, the controller further:activating the fan and causing movement of the vent flap into the closed position when the steam generator is active; anddeactivating the fan and causing movement of the vent flap into the open position when the steam generator is inactive.13.The steam cooking assembly of claim 12, wherein the fan is in fluid communication with a portion of the vent duct between the vent flap and the outlet end.14.The steam cooking assembly of claim 13, wherein:the vent duct defines a fan aperture between the vent flap and the outlet end; andthe fan is mounted in a fan housing having a first opening and coupled with the vent duct with the first opening.15.The steam cooking assembly of claim 12 or claim 13, wherein:when the vent flap is in the closed position, a fluid flow through the vent duct is at least partially blocked; andwhen the vent flap is in the open position, the fluid flow through the vent is permitted.16.The steam cooking assembly of claim 12 or claim 13, further including a linear actuator mounted to the vent duct and operably coupled with the vent flap for causing movement thereof between the open position and the closed position.17.The steam cooking assembly of claim 12, wherein the steam generator includes a heater and a water supply fluidly coupled with the heater.18.The steam cooking assembly of claim 12 or claim 17, wherein the vent fan is operable to cool steam passing the vent flap within the vent duct.19.The steam cooking assembly of claim 18, wherein the vent fan is operable to cool steam passing the vent flap within the vent duct to cause condensation thereof within the vent duct.20.A cooking appliance, comprising:an outer housing defining a vent outlet,an inner liner defining a cooking cavity and a steam inlet and a vent inlet, the outer housing and the inner liner defining a mechanical room therebetween;a primary heat source operable to provide cooking heat to the cooking cavity;a steam generator mounted within the mechanical room and fluidly connected with the steam inlet for providing steam to the cooking cavity via the steam inlet;a vent duct extending from the vent inlet of the inner liner to the vent outlet, a vent flap being positioned within the vent duct and moveable between a closed position and an open position;a fan in fluid communication with a portion of the vent duct between the vent inlet and the vent outlet and operable when the vent flap is in the closed position to cool steam passing the vent flap within the vent duct.