Cold control damper assembly

Details Cold control damper assembly Cold control damper assembly

2006-09-19

2006-09-19

Ali, Mohammad M. (Department: 3744)

Refrigeration

Automatic control

Of external fluid or means

C062S408000

Reexamination Certificate

active

07107775

ABSTRACT:
The invention consists of a unit10including a two-piece, snap together housing made of elements40and50which forms the orifice seat and the transitions which direct moisture away from the seat area and prevents the accumulation of moisture in the seat area. Left-Hand (LH) housing50contains a blind journal and right-hand (RH) housing portion40contains a through journal for support and location of the gate60. Also integral to the RH housing portion40are bosses for attaching the snap action switches80, which determine gate orientation and mounting a gear motor90, and can generally be referenced as “gate position sensors”. Such switches could also be replaced with other gate position sensors such as know in the art such as hall effect switches, magnetic switches, optical devices, etc.The gear motor provides the driving torque to the gate60through a cam-coupling70, which has four switch detents71, oriented to an internal shaft indexing means. Insulation members20, 30minimize condensation in the housing portions40, 50by separating the cold air flowing through housing from the warmer air which surrounds the damper assembly10. In operation, a temperature sensing device/system senses the compartment temperature and energizes the gear motor90, rotating the gate60into the open or closed position. The position of the gate60is determined by the combination of the states of the two switches80. When used with mechanical controls the gate will rotate 90 degrees per cycle. When used with an electronic control system, the gate60can be rotated to any desired position and then stopped.

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