Collapsible hood

1 . An air handling unit (AHU) comprising:

a cabinet in which one or more components of the AHU are arranged and defining at least one air vent;

a collapsible hood comprising:

a cap plate fixedly connected to the cabinet above the at least one air vent;

a hinge plate fixedly connected to the cap plate;

a base bracket fixedly connected to the cabinet below the cap plate;

a hood plate pivotally connected to the hinge plate; and

a pair of side plates each of which is pivotally connected to the cap plate and the base bracket, wherein:

the hinge plate comprises a loop aperture;

the hood plate comprises an aperture that defines a hook shaped flange; and

the hook shaped flange of the hood plate is received in the loop aperture of the hinge plate to form the pivotal connection between the hood plate and the hinge plate.

2 . The AHU of claim 1 , wherein the collapsible hood is configured to be arranged in:

a working configuration in which the hood plate and the pair of side plates extend away from the cap plate and the base bracket and are configured to inhibit ingress of materials other than air through the at least one air vent; and

a collapsed configuration in which the hood plate and the pair of side plates are folded in a flat stacked arrangement toward the cabinet and over the at least one air vent.

3 . The AHU of claim 1 , wherein the collapsible hood is configured to be arranged in:

the working configuration in which the hood plate is inclined to extend down and out from the cap plate, and each of the pair of side plates extends away from the cap plate and the base bracket to mate with the hood plate; and

the collapsed configuration in which the pair of side plates are pivoted toward each other into approximately parallel alignment with the cap plate and the base bracket, the hood plate is pivoted down toward the cabinet into an approximately vertical arrangement at least partially over the pair of side plates.

4 . The AHU of claim 1 , further comprising a screen pivotally connected to the hood plate.

5 . The AHU of claim 4 , wherein the collapsible hood is configured to be arranged in:

a working configuration in which the hood plate is inclined to extend down and out from the cap plate, the screen extends toward the base bracket and the cabinet from the hood plate and is connected to the base bracket, each of the pair of side plates extends away from the cap plate and the base bracket to mate with the hood plate over the screen; and

a collapsed configuration in which the pair of side plates are pivoted toward each other into approximately parallel alignment with the cap plate and the base bracket, the hood plate is pivoted down toward the cabinet into an approximately vertical arrangement, and the screen is pivoted up toward the hood plate into an approximately vertical arrangement between the pair of side plates and the hood plate.

6 . The AHU of claim 1 , wherein:

a first side plate of the pair of side plates is pivotally connected toward a first end of the cap plate and pivotally connected toward a first end of the base bracket; and

a second side plate of the pair of side plates is pivotally connected toward a second end of the cap plate opposite the first end of the cap plate and pivotally connected toward a second end of the base bracket opposite the first end of the base bracket.

7 . The AHU of claim 1 , wherein each of the cap plate, the base bracket, the hood plate, and the pair of side plates comprise sheet metal.

8 . The AHU of claim 1 , further comprising a pair of side brackets, each of which is configured to be connected to the cabinet and one of the pair of side plates.

9 . The AHU of claim 8 , wherein the collapsible hood is configured to be arranged in:

the working configuration in which the hood plate is inclined to extend down and out from the cap plate, each of the pair of side plates extends away from the cap plate and the base bracket to mate with the hood plate, and each of the side brackets is connected to the cabinet and toward an edge of one of the side plates adjacent the cabinet.