| 摘要 |
A refrigeration unit for coin-operated, food item vending machines having box-like metal cabinets with substantially flat, vertical front panels; substantially flat, horizontal top panels; coin mechanisms within the cabinets; food item supporting, transporting and dispensing mechanisms within the cabinets; item selecting and operating mechanisms; and, item discharge ducts extending through and accessible at the exterior of said front panels. The refrigeration unit operates to recirculate and cool the air within the cabinets and to maintain food items therein at desired, safe, low temperatures. The refrigeration unit includes a horizontal, downwardly opening box-like base supported atop the top panel of a related machine with said top panel closing the bottom thereof. The base has a vertical partition extending transverse its interior and defining a downwardly opening air delivery chamber and a downwardly opening air return chamber. The top panel has one or more air delivery ports and one or more air return ports communicating with the delivery and return chambers and selectively positioned in the top panel to most effectively and efficiently circulate air flowing from the delivery chamber throughout the interior of the cabinet and then into the return chamber. The refrigeration unit next includes a thermally insulated case supported by the base. The base has an evaporator coil unit with an air moving fan extending transverse the interior of the case and defining air intake and outlet compartments therein. The base has air intake and air outlet openings establishing communication between the air intake compartment and return chamber and between the air outlet compartment and delivery chamber.
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