Feature for Accelerating Evacuation of a Vacuum Insulated Structure

This application claims priority to U.S. patent application Ser. No. 18/140,140, filed on Apr. 27, 2023, entitled “FEATURE FOR ACCELERATING EVACUATION OF A VACUUM INSULATED STRUCTURE,” the disclosure of which is hereby incorporated herein by reference in its entirety.

The present disclosure generally relates to a vacuum insulated appliance, and more specifically, to a feature for accelerating evacuation from a vacuum insulated appliance.

According to one aspect of the present disclosure, a vacuum insulated appliance includes a cabinet with an outer wrapper and an inner liner coupled to the outer wrapper. A cabinet vacuum insulated cavity is defined between the outer wrapper and the inner liner. A trim breaker is coupled to the outer wrapper and the inner liner, and the trim breaker seals the cabinet vacuum insulated cavity. A wrapper evacuation port is defined by the outer wrapper. The wrapper evacuation port is in fluid communication with the cabinet vacuum insulated cavity for evacuating air from the cabinet vacuum insulated cavity. A first porous foam is coupled to an inner surface of the outer wrapper. The first porous foam defines a first plurality of pores. The first plurality of pores defines a first airflow path that is in fluid communication with the wrapper evacuation port. A door assembly is coupled to a front portion of the cabinet. The door assembly includes a door wrapper. A door liner is coupled to the door wrapper. A door vacuum insulated cavity is defined between the door wrapper and the door liner. A door evacuation port is defined by the door liner. The door evacuation port is in fluid communication with the door vacuum insulated cavity for evacuating air from the door vacuum insulated cavity. A second porous foam is coupled to an inner surface of the door liner. The second porous foam defines a second plurality of pores. The second plurality of pores defines a second airflow path in fluid communication with the door evacuation port.

According to another aspect of the present disclosure, a vacuum insulated appliance includes a cabinet with an outer wrapper and an inner liner coupled to the outer wrapper. A cabinet vacuum insulated cavity is defined between the outer wrapper and the inner liner. A trim breaker is coupled to the outer wrapper and the inner liner, and the trim breaker seals the cabinet vacuum insulated cavity. A wrapper evacuation port is defined by the outer wrapper. The wrapper evacuation port is in fluid communication with the cabinet vacuum insulated cavity for evacuating air from the cabinet vacuum insulated cavity. A porous foam is coupled to and extends along an inner surface of the outer wrapper. The porous foam defines a plurality of pores. The plurality of pores defines at least one first airflow path in fluid communication with the wrapper evacuation port for evacuating air from the cabinet vacuum insulated cavity through the at least one first airflow path.

According to yet another aspect of the present disclosure, a vacuum insulated door assembly for an appliance includes a door wrapper. A door liner is coupled to the door wrapper. The door liner defines a door evacuation port. A door vacuum insulated cavity is defined between the door wrapper and the door liner. Insulation powder is disposed within the door vacuum insulated cavity. A porous foam is coupled to an inner surface of the door liner. The porous foam defines a plurality of pores. The plurality of pores defines a plurality of airflow paths in fluid communication with the door vacuum insulated cavity and the door evacuation port for evacuating air from the door vacuum insulated cavity, through the plurality of airflow paths, and the door evacuation port.

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.

The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles described herein.

The present illustrated embodiments reside primarily in combinations of method steps and apparatus components related to a vacuum insulated 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. 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.

Referring to, reference numeralgenerally designates an appliance that includes a cabinet. The cabinetincludes an outer wrapperand an inner linercoupled to the outer wrapper. A vacuum insulated cavityis defined between the outer wrapperand the inner liner. A trim breakeris coupled to the outer wrapperand the inner liner, and the trim breakerseals the vacuum insulated cavity. An evacuation port, also referred to as a wrapper evacuation port, is defined by the outer wrapper. The evacuation portis in fluid communication with the vacuum insulated cavityfor evacuating air from the vacuum insulated cavity. A first porous foamis coupled to an inner surfaceof the outer wrapper. The first porous foamdefines a first plurality of pores. The first plurality of poresdefines a first airflow pathin fluid communication with the evacuation port.

A door assemblyis coupled to a front portionof the cabinet. The door assemblyincludes a door wrapper. A door lineris coupled to the door wrapper. A door vacuum insulated cavityis defined between the door wrapperand the door liner. A door evacuation portis defined by the door liner. The door evacuation portis in fluid communication with the door vacuum insulated cavityfor evacuating air from the door vacuum insulated cavity. A second porous foamis coupled to an interior surfaceof the door wrapper. The second porous foamdefines a second plurality of pores. The second plurality of poresdefines a second airflow pathin fluid communication with the door evacuation port.

Referring to, the applianceis illustrated as a refrigerator appliance, however, it is contemplated that the cabinetwith the outer wrapper, the inner liner, and the vacuum insulated cavitymay be used with a variety of appliances, structures, or insulation purposes other than with an appliance. Moreover, the illustrated refrigerating applianceis a bottom-mount refrigerator. In non-limiting examples, the refrigerating appliancecan be a bottom-mount refrigerator, a bottom-mount French door refrigerator, a top-mount refrigerator, a side-by-side refrigerator, a four-door French door refrigerator, and/or a five-door French door refrigerator, each of which can have one or more door assemblies.

With reference still to, the illustrated applianceincludes the door assemblythat is pivotably coupled to the cabinet. The door assemblyis operable between open and closed positions and selectively provides access to a refrigerator compartment. The appliancealso includes a lower pull-out drawerthat defines or provides access to a freezer compartment. It will generally be understood that the features, as set forth herein, could be applied to any appliance having any general configuration. Further, the door assemblyconfiguration of the appliancecan vary from that shown in. The door assembly, as illustrated in, includes a handleconfigured to allow a user to move the door assemblybetween the opened and closed positions. The refrigerator compartmentand the freezer compartmentinclude shelving, as shown in, that can be adjusted and moved, depending on consumer preference. It is also generally contemplated that the door assemblydisclosed herein may be used with a variety of appliances, structures, or insulation purposes other than with an appliance.

The cabinetis a vacuum insulated cabinet. As illustrated in, the cabinetincludes the outer wrappercoupled with the inner linerto define the vacuum insulated cavitytherebetween. The outer wrapperand the inner linermay alternatively be referred to as a structural wrapper that defines the vacuum insulated cavity. The door assemblyis a vacuum insulated door assembly. The door assemblyincludes the door wrappercoupled with the door linerto define the door vacuum insulated cavitytherebetween.

In the depicted example of, the cabinetincludes the outer wrapperthat is coupled to the inner linerand the trim breakerto define the vacuum insulated cavity, which may alternatively be referred to as the cabinet vacuum insulated cavity. The outer wrapperincludes a front edgedefining an opening, a rear panelopposing the front edge, a top paneland an opposing bottom panelbetween the front edgeand the rear panel, and a first side paneland an opposing second side panelbetween the front edgeand the rear panel. The outer wrappermay be made from a material at least partially resistant to bending, deformation, or otherwise being formed in response to an inward compressive force(). These materials for the outer wrapperinclude, but are not limited to, metals, polymers, metal alloys, combinations thereof, and/or other similar substantially rigid materials that can be used for vacuum insulated structures.

Referring further to, the inner lineris at least partially enclosed by the outer wrapper. The inner linerincludes a front edge, a rear sectionthat opposes the front edge, a top sectionand an opposing bottom sectionbetween the front edgeand the rear section, and a first side sectionand an opposing second side sectionbetween the top sectionand the bottom section. Further, as illustrated in, the inner linermay have intermediate sections extending between the refrigerator and freezer compartments,. One intermediate section may form a lower portion of the refrigerator compartment, with a second intermediate section may form an upper portion of the freezer compartment. The intermediate sections extend from the front edgeto the rear sectionand are configured to separate the compartments,and define a mullion region therebetween. In such configurations, the inner linermay be multiple components.

As illustrated in, each section,,,,,of the inner linermay be proximate a respective section,,,,,of the outer wrapper. Similarly, each section,,,,,of the inner linermay have a shape and size that coincides with the shape and size of the respective section,,,,,of the outer wrapper. The inner linermay be made from a material at least partially resistant to bending, deformation, or otherwise being formed in response to the inward compressive force(). These materials for the inner linerinclude, but are not limited to, metals, polymers, metal alloys, combinations thereof, and/or other similar substantially rigid materials that can be used for vacuum insulated structures.

The trim breakercouples to the outer wrapperto the inner linerto define and seal the vacuum insulated cavity. The trim breakeris generally disposed proximate the openingof the outer wrapper. The trim breakerincludes one or more channels that receive the front edgeof the outer wrapperand the front edgeof the inner liner. An adhesive is then disposed within one or more of the channels to couple the front edgeof the outer wrapperand the front edgeof the inner linerto the trim breakersuch that a sealed interface is defined. The outer wrapper, the inner liner, and the trim breakerare sealed and airtight such that air can neither escape nor enter into the vacuum insulated cavitybetween the outer wrapperand the inner liner.

Referring still to, the door assemblyis shown coupled to the cabinet. The door assemblyincludes the door wrapperthat is coupled to the door linerto define the door vacuum insulated cavity. The door wrapperand the door linermay alternatively be referred to as a door structural wrapper that defines the door vacuum insulated cavity. The door wrapperincludes an exterior surfacefacing outward from the cabinetand an interior surfaceopposing the exterior surface, generally facing the door vacuum insulated cavity. The door linerlikewise defines an exterior surfaceconfigured to face the refrigerator compartmentwhen the door assemblyis closed, and an interior surfacethat opposes the door linerexterior surface, generally facing the door vacuum insulated cavity.

According to various aspects, the interior surfaceof the door wrapperand the interior surfaceof the door linerat least partially enclose the door vacuum insulated cavity. The door wrapperand the door linermay be made from a material at least partially resistant to bending, deformation, or otherwise being formed in response to the inward compressive force(). These materials for the door wrapperand the door linerinclude, but are not limited to, metals, polymers, metal alloys, combinations thereof, and/or other similar substantially rigid materials that can be used for vacuum insulated structures.

Referring further to, an at least partial vacuumis defined within the vacuum insulated cavityand the door vacuum insulated cavity. In the cabinet, the at least partial vacuumdefines a pressure differentialbetween an environment external to the cabinetand the vacuum insulated cavity. Similarly, in the door assembly, the at least partial vacuumdefines the pressure differentialbetween an environment external to the door assemblyand the door vacuum insulated cavity. The pressure differentialserves to define the inward compressive forcethat is exerted on both the outer wrapperand the inner linerof the cabinet(), and both the door wrapperand the door linerof the door assembly(). The inward compressive forcetends to bias the outer wrapperand the inner linertowards the vacuum insulated cavity, and, similarly, the inward compressive forcetends to bias the door wrapperand the door linertowards the door vacuum insulated cavity. It is also contemplated that the pull-out drawermay be a vacuum insulated door assembly constructed similarly to the door assembly.

Each of the vacuum insulated cavityof the cabinetand the door vacuum insulated cavityof the door assemblytypically includes one or more insulation powdersdisposed therein. It is generally contemplated that the insulation powdermay be a carbon-based powder, a glass-type powder, a silicon oxide-based powder, silica-based powders, and/or other standard insulation powdersknown in the art. According to various aspects, the insulation powerincludes a plurality of insulation particles. The insulation powdersubstantially fills the vacuum insulated cavityand the door vacuum insulated cavity, forming a substantially continuous layer in each cavity,. In the cabinet, the layer may be disposed between the first porous foamand the inner liner. Likewise, in the door assembly, the layer may be disposed between the second porous foamand the door wrapper.

To increase evacuation of fluid, while still ensuring the insulation powderremains disposed within the vacuum insulated cavity,, respectively, the appliancedisclosed herein may incorporate the evacuation portthat is in fluid communication with the first porous foam, and the door evacuation portthat is in fluid communication with the second porous foam. In particular, the use of the first porous foamand the second porous foampermit more uniform and more efficient extraction of the gas from each vacuum insulated cavity,, while still filtering out the insulation powdersuch that the insulation powderis maintained within each vacuum insulated cavity,. Accordingly, while the gas is evacuated during the evacuation process, the insulation powderis not.

Referring still to, as well as, the appliancedefines one or more evacuation ports,. In the illustrated example, the outer wrapperdefines the evacuation port, which is an opening into the vacuum insulated cavity. The evacuation portmay be alternatively referred to as the cabinet evacuation port and/or the wrapper evacuation port. The at least partial vacuumwithin the vacuum insulated cavityis typically defined by evacuation of gas through the evacuation portvia an evacuation port assemblyA operably disposed in the evacuation port.

The door assemblydefines one or more door evacuation ports. In the illustrated example, the door linerdefines the door evacuation port, which is an opening into the door vacuum insulated cavity. The at least partial vacuumwithin the door vacuum insulated cavityis typically defined by evacuation of gas through the door evacuation portvia the evacuation port assemblyB.

It is generally contemplated that the appliancemay include a plurality of evacuation port assembliesA,B disposed throughout the appliance. For example, the appliancemay include a first evacuation port assemblyA coupled to the evacuation portand a second evacuation port assemblyB coupled to the door evacuation port. In such examples, both evacuation port assembliesA,B may have a structure and size that coincides with or differs from the other evacuation port assemblyA,B. For example, the first evacuation port assemblyA may be of a greater size than the second evacuation port assemblyB. According to various aspects, both evacuation port assembliesA,B are coupled to the outer wrapperand the door liner, respectively, before bonding the porous foams,to the outer wrapperand the door liner.

The first evacuation port assemblyA includes a baseA and a service tubeA extending from the baseA. In various aspects, the first evacuation port assemblyA is in fluid communication with the vacuum insulated cavityvia the evacuation portto expel gas from the vacuum insulated cavity.

The baseA of the first evacuation port assemblyA may be coupled to the outer wrapperand is adjacent to the evacuation port. Typically, the baseA extends over and surrounds the evacuation port. The baseA may be coupled to an outer surfaceor the inner surfaceof the outer wrapper. It is also generally contemplated that the baseA may be coupled to the inner liner. For example, the baseA may be coupled to an outer surfaceor an inner surfaceof the inner liner.

As illustrated in, the service tubeA extends from the baseA and is external from the vacuum insulated cavity. The service tubeA is in fluid communication with the vacuum insulated cavity. The service tubeA defines an evacuation path such that gas can be exhausted from the vacuum insulated cavity.

Referring further to, the first evacuation port assemblyA may include an evacuation shaftA to aid in the removal of gas from the vacuum insulated cavity. The evacuation shaftA may extend from the baseA, through the evacuation portand into the vacuum insulated cavity.

According to various examples, the evacuation shaftA may include one or more apertures that are in fluid communication with the vacuum insulated cavity. For example, the evacuation shaftA may include one or more apertures disposed along a length of the evacuation shaftA, or the evacuation shaftA may include a central end opening. Additionally, or alternatively, it is generally contemplated that the evacuation port assemblyA may include various other components for aiding in the removal and/or filtration of gasses from the vacuum insulated cavity. For example, filter paper or a mesh screen may be disposed over the evacuation port.

Similarly, the second evacuation port assemblyB includes a baseB and a service tubeB extending from the baseB. In various aspects, the second evacuation port assemblyB is in fluid communication with the door vacuum insulated cavityvia the door evacuation portto expel gas from the door vacuum insulated cavity.

The baseB of the second evacuation port assemblyB may be coupled to the door linerand is adjacent to the door evacuation port. Typically, the baseB extends over and surrounds the door evacuation port. The baseB may be coupled to the exterior surfaceor the interior surfaceof the door wrapper, or that the baseB may be coupled to the exterior surfaceor the interior surfaceof the door liner.

The service tubeB of the second evacuation port assemblyB extends from the baseB and is external from the door vacuum insulated cavity. The service tubeB is in fluid communication with the door vacuum insulated cavity. The service tubeB defines an evacuation path such that gas can be exhausted from the door vacuum insulated cavity. The second evacuation port assemblyB may include an evacuation shaftB to aid in the removal of gas from the door vacuum insulated cavity. The evacuation shaftB may extend from the baseB, through the door evacuation port, and into the door vacuum insulated cavity.

According to various examples, the evacuation shaftB may include one or more apertures that are in fluid communication with the door vacuum insulated cavity. For example, the evacuation shaftB may include one or more apertures disposed along a length of the evacuation shaftB, or the evacuation shaftB may include a central end opening. Additionally, or alternatively, it is generally contemplated that the evacuation port assemblyB may include various other components for aiding in the removal and/or filtration of gasses from the door vacuum insulated cavity. For example, filter paper or a mesh screen may be disposed over the door evacuation port.

Referring again to, the first porous foamis disposed within the vacuum insulated cavity. In the illustrated example, the first porous foamis shown disposed within the vacuum insulated cavityand coupled to the inner surfaceof the outer wrapper. Generally, the first porous foamis directly bonded to the inner surface. For example, the first porous foammay be a spray foam that is applied to the inner surfaceof the outer wrapper. The first porous foammay bond to the inner surfaceof the outer wrapperduring a curing process. For example, the first porous foamcan be sprayed to the outer wrapperin an uncured state. The first porous foammay then cure to the outer wrapper, wherein during the curing process, the first porous foambonds to the inner surfaceof the outer wrapper. In various aspects, the first porous foammay be bonded to various surfaces within the vacuum insulated cavity, such as the inner surfaceof the inner liner.

According to various aspects, the first porous foammay be disposed in the vacuum insulated cavitysuch that the first porous foamextends along a portion or an entirety of the inner surfaceof the outer wrapperand/or the inner surfaceof the inner liner. In some examples, the first porous foammay be the spray foam that is bonded to the inner surfaceof the outer wrapperand extends along an entirety of the inner surfaceof the outer wrapper.

In various aspects, the first porous foammay be bonded to various areas of the cabinet. For example, the first porous foamcan be bonded to the rear panelof the outer wrapper, which may be advantageous when the evacuation portis defined in the rear panel. In additional aspects, the first porous foammay be disposed in the vacuum insulated cavitysuch that one or more patterns are defined. For example, the first porous foammay include a plurality of foam strips extending along the vacuum insulated cavity. In such examples, the plurality of foam strips may individually, as a group, and/or as an entirety, define various patterns, such as a grid pattern, an X-pattern, and/or other various patterns.

Referring still to, as well as, the second porous foamis disposed within the door vacuum insulated cavity. In the illustrated example, the second porous foamis shown disposed within the door vacuum insulated cavityand coupled to the interior surfaceof the door liner. In some examples, the second porous foamis directly bonded to the interior surfaceof the door liner. For example, the second porous foamcan be sprayed on the door linerin an uncured state. The second porous foammay then cure to the door liner, wherein during the curing process, the second porous foambonds to the door liner. In various aspects, the second porous foammay be bonded to various surfaces within the door vacuum insulated cavity, such as the interior surfaceof the door wrapper.

According to various aspects, the second porous foammay be disposed in the door vacuum insulated cavitysuch that the second porous foamextends along a portion or an entirety of the interior surfaceof the door lineror the interior surfaceof the door wrapper. In certain aspects, the second porous foammay be a spray foam that is bonded to the interior surfaceof the door linerand extends along an entirety of the interior surfaceof the door liner.

Additionally, or alternatively, the second porous foammay be bonded to various areas of the door assembly. For example, the second porous foamcan be bonded to a central region of the door liner, which may align with the door evacuation port. In additional aspects, the second porous foammay be disposed in the door vacuum insulated cavitysuch that one or more patterns are defined. For example, the second porous foammay include a plurality of foam strips extending along the door vacuum insulated cavity. In such examples, the plurality of foam strips may individually, as a group, and/or as an entirety, define various patterns, such as a grid pattern, an X-pattern, and/or other various patterns.

According to various aspects, the thickness of the first porous foamand the second porous foammay be one of multiple thicknesses. Generally, the first porous foammay have a thickness that is less than the space between the inner surfaceof the outer wrapperand the inner surfaceof the inner liner, and the second porous foammay have a thickness that is less than the space between the door wrapperinterior surfaceand the door linerinterior surface. For example, the first porous foamand/or the second porous foammay have a thickness of about 5 millimeters (mm). In some examples, the first porous foammay have a thickness that is equal to or less than a thickness of the outer wrapperand/or the inner liner. Similarly, the second porous foammay have a thickness that is equal to or less than the thickness of the door wrapperand/or the door liner.

In various aspects, the first porous foamand/or the second porous foammay define multiple thicknesses. For example, either porous foam,may have a first region with a greater thickness than a second, central region. In such examples, it is contemplated that the varying thicknesses of either porous foam,may define one or more gas extraction channels within the vacuum insulated cavityand/or the door vacuum insulated cavity. According to various aspects, where either porous foam,is a spray foam, the thickness of either porous foam,may be determined by the amount of spray foam applied to various sections of the cabinetand/or door assembly.

Referring again to, and still to, the first porous foamand the second porous foammay each be configured as an open-cell foam that defines a plurality of pores. For example, the first porous foammay be an open-cell foam that defines the first plurality of poresand the second porous foammay be an open-cell foam that defines the second plurality of pores. It is also generally contemplated that the first porous foamand/or the second porous foammay define a partially open-cell foam or a foam having regions of open-cell foam and closed-cell foam.

The first plurality of poresof the first porous foammay define at least one airflow paththat is in fluid communication with the vacuum insulated cavityand the evacuation port. For example, the first porous foammay be an open-cell foam that defines the first airflow pathfrom an outer regionof the first porous foam, which is distal from the inner surfaceof the outer wrapperand in contact with gasses retained within the vacuum insulated cavity, to an inner regionof the first porous foam, which is proximate the inner surfaceand extends to the evacuation port. In such examples, the gasses are evacuated out of the vacuum insulated cavityby being pulled along the first airflow path, which pulls the gas from the vacuum insulated cavity, through the first porous foam, and out of the evacuation port, where the gas is then expelled out of the appliance.

According to various aspects, the first airflow pathgenerally directs the fluid being evacuated towards the evacuation port. In some examples, the first airflow pathmay be defined such that the fluid flows in a direction parallel to the outer wrapperand/or the inner liner. For example, the first plurality of poresmay generally align with one another such that the first airflow pathtravels parallel to the outer wrapper. In this way, the gas from distal locations, such as upper and lower portions of the cabinetmay flow through the first airflow pathof the porous foam, generally parallel to the outer wrapperto the evacuation port.

In various aspects, the first plurality of poresmay define a plurality of first airflow paths. For example, the first airflow pathmay include a plurality of airflow channels that are each in communication with the vacuum insulated cavityand the evacuation port. In such examples, the plurality of airflow channels of the first airflow pathpermits the more uniform evacuation of gas out of the vacuum insulated cavitydue to the gas being more uniformly pulled along a plurality of inlet points and airflow channels that collectively direct the gas towards the evacuation port.

Further, in such examples, the gas being uniformly pulled along at the plurality of inlet points may flow in various directions. For example, gas being uniformly pulled at an inlet point that is distal from the evacuation portmay flow perpendicular to the inner surfaceof the outer wrapperas the gas enters the inlet point. The gas may then be pulled parallel to the inner surfaceand combined with other gases, where the combined gas then travels to the evacuation port. Additionally, or alternatively, the first porous foamcan be an open-cell foam and the plurality of channels can be defined by the open-cell structure of the first porous foam. In such examples, the plurality of airflow channels may be defined by various factors such as, pores per cell, permeability of the porous foam, and/or various other factors.

The second plurality of poresof the second porous foammay likewise define at least one airflow paththat is in fluid communication with the door vacuum insulated cavityand the door evacuation port. For example, the second porous foammay be an open-cell foam that defines the second airflow pathfrom an outer regionof the second porous foam, which is in contact with gasses retained within the door vacuum insulated cavity, to an inner regionof the second porous foam, which extends to the door evacuation port. In such examples, the gasses are evacuated out of the door vacuum insulated cavityby being pulled along the second airflow path, which pulls the gas from the door vacuum insulated cavity, through the second porous foam, and out of the door evacuation port, where the gas is then expelled out of the door assembly.