Filter matrix and casings

A filter matrix structure substantially overlying cooking equipment at a selective distance therefrom for reducing volatile particulate matter and organic compounds in cooking smoke, said filter matrix structure comprising:

• at least one filter matrix having:
• a stack of at least two expanded metal filter layers, each of said expanded metal filter layers having a plurality of predetermined apertures defined therein arranged in an array for the passage of cooking smoke therethrough;
• wherein each of said apertures in each of said expanded metal filter layers is diamond-shaped defined by four walls which are inclined at an angle to a plane defined by the expanded metal filter layers;
• wherein each of said expanded metal filter layers has a major axis and a minor axis such that when said expanded metal filter layers are stacked, said major axis of one of said expanded metal filter layers is perpendicular to the major axis of the next adjacent expanded metal filter layer;
• and
• wherein at least one of said filter matrices has at least one filter screen layer, said at least one filter screen layer being flat and contiguous to one of said expanded metal filter layers and having a plurality of pre-determined apertures defined therein arranged in an array for the passage of cooking smoke therethrough, and wherein each of said apertures is diamond shaped;
• and
• a casing for slidably receiving said at least one filter matrix.

A filter matrix structure substantially overlying cooking equipment at a selective distance therefrom for reducing volatile particulate matter and organic compounds in cooking smoke, said filter matrix structure comprising:

• at least two filter matrices hingedly mounted to one another, said filter matrices having:
• a stack of at least two expanded metal filter layers, each of said expanded metal filter layers having a plurality of predetermined apertures defined therein arranged in an array for the passage of cooking smoke therethrough;
• wherein each of said apertures in each of said expanded metal filter layers is diamond-shaped defined by four walls which are inclined at an angle to a plane defined by the expanded metal filter layers;
• and
• wherein each of said expanded metal filter layers has a major axis and a minor axis such that when said expanded metal filter layers are stacked, said major axis of one of said expanded metal filter layers is perpendicular to the major axis of the next adjacent expanded metal filter layer.

A filter matrix substantially overlying a broiler at a selective distance therefrom for reducing volatile particulate matter and organic compounds in broiler smoke, said filter matrix comprising:

• at least one filter screen layer horizontally disposed above the broiler for arresting the broiler flame;
• and
• a stack of at least two expanded metal filter layers, the first of which is contiguous to said filter screen layer which is directly above the broiler;
• wherein each of said at least one filter screen layer is flat and has a plurality of pre-determined apertures defined therein arranged in an array for the passage of broiler smoke therethrough and wherein each of said apertures is diamond shaped;
• wherein each of said expanded metal filter layers has a plurality of pre-determined apertures defined therein arranged in an array for the passage of broiler smoke therethrough,
• wherein each of. said apertures in each of said expanded metal filter layers is diamond-shaped defined by four wails which are inclined at an angle:
• and
• wherein each of said expanded metal filter layers has a major axis and a minor axis such that when said expanded metal filter layers are stacked. said major axis of one of said expanded metal filter lagers is perpendicular to the major axis of the next adjacent expanded metal filter layer:
• whereby when the broiler smoke is passing through said filter matrix. the pathway of the broiler smoke is labyrinthine.