Abstract: An improved apparatus for regulating air flow between a cooling unit and a compartment in a refrigeration system includes a first baffle element having an array of first air passages, and a second baffle element having an array of second air passages. The first baffle element and the second baffle element are slidingly engaged and are slidingly positionable with respect to each other. The first air passages and the second air passages cooperate to pass air through the apparatus when the first baffle element and the second baffle element are in a first position, and the first air passages and the second air passages cooperate to substantially block air from passing through the apparatus when the first baffle element and the second baffle element are in a second position. The apparatus further includes an actuator coupled with the first baffle element and the second baffle element for slidingly positioning the baffle elements, the actuator having an actuated state and an idle state.

Abstract: A defrost recycle apparatus and method for use with a temperature control system is provided. The temperature control system includes a heat transfer unit for removing heat from an enclosed space. The temperature control system automatically defrosts the heat transfer unit based upon a default defrost control strategy. After the termination of a defrost operation initiated according to the default defrost control strategy, the defrost recycle apparatus determines if the defrost operation was successful (completely defrosted the heat transfer unit) based upon two parameters associated with the defrost operation. In the preferred embodiment, the defrost recycle apparatus determines the success of the defrost operation based upon the temperature in the vicinity of the heat transfer unit after a predetermined period of time has elapsed after the termination of the defrost operation.