Disclosed are a damper switch mounted on a damper having a blade opening/closing structure to open/close blades of the damper, and a damper including the same. The damper switch configured to open/close a plurality of blades of a damper according to the present invention includes a rotating part mounted on a damper shaft of the damper and rotated together with the damper shaft, a driving part configured to provide a power for rotating the rotating part, and a controller configured to measure a load applied to the driving part when the blades are closed, and interrupt an electric power supplied to the driving part when the measured load is not less than a predetermined value.

Disclosed are a damper switch mounted on a damper having a blade opening/closing structure to open/close blades of the damper, and a damper including the same. The damper switch configured to open/close a plurality of blades of a damper according to the present invention includes a rotating part mounted on a damper shaft of the damper and rotated together with the damper shaft, a driving part configured to provide a power for rotating the rotating part, and a controller configured to measure a load applied to the driving part when the blades are closed, and interrupt an electric power supplied to the driving part when the measured load is not less than a predetermined value.

A fire damper including a frame and a plurality of blades rotatably mounted to the frame such that each blade is rotatable about a respective rotational axis between an open rotational position and a closed rotational position, each blade including at least one substantially planar portion; and a side edge portion which is curved away from a plane of the substantially planar portion, wherein a first curved side edge portion of a first of the blades is adapted to engage a second curved side edge portion of a second of the blades, adjacent the first, when the blades are in the closed position; and wherein the first curved side edge portion curves in an opposite direction to the second curved side edge portion when the first and second blades are engaged.

A fire damper including a frame and a plurality of blades rotatably mounted to the frame such that each blade is rotatable about a respective rotational axis between an open rotational position and a closed rotational position, each blade including at least one substantially planar portion; and a side edge portion which is curved away from a plane of the substantially planar portion, wherein a first curved side edge portion of a first of the blades is adapted to engage a second curved side edge portion of a second of the blades, adjacent the first, when the blades are in the closed position; and wherein the first curved side edge portion curves in an opposite direction to the second curved side edge portion when the first and second blades are engaged.

A generator enclosure for an engine-generator includes multiple walls defining at least one air path. In one example, a first wall includes an exhaust path for the engine-generator, and a second wall includes an intake path for the engine-generator. The generator enclosure may include at least one air flow frame associated with the exhaust path or the intake path and at least one movable wall supported by the at least one air flow frame, At least one thermal fuse may be coupled to the at least one movable wall and configured to release the at least one movable wall to block the exhaust path or the intake path.

Disclosed are a damper switch mounted on a damper having a blade opening/closing structure to open/close blades of the damper, and a damper including the same. The damper switch configured to open/close a plurality of blades of a damper according to the present invention includes a rotating part mounted on a damper shaft of the damper and rotated together with the damper shaft, a driving part configured to provide a power for rotating the rotating part, and a controller configured to measure a load applied to the driving part when the blades are closed, and interrupt an electric power supplied to the driving part when the measured load is not less than a predetermined value.

Disclosed are a damper switch mounted on a damper having a blade opening/closing structure to open/close blades of the damper, and a damper including the same. The damper switch configured to open/close a plurality of blades of a damper according to the present invention includes a rotating part mounted on a damper shaft of the damper and rotated together with the damper shaft, a driving part configured to provide a power for rotating the rotating part, and a controller configured to measure a load applied to the driving part when the blades are closed, and interrupt an electric power supplied to the driving part when the measured load is not less than a predetermined value.