Design of a Freezer Lock
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Loading a palletized frozen-food warehouse using a forklift requires a large door, through which air is exchanged every time it is opened. The cold air, which is generated at great energy cost, is unnecessarily lost, and the moisture brought in with the warm air causes unwanted ice formation. Furthermore, it must be assumed that the pallets are transported on the loading dock and within the warehouse using various industrial trucks—meaning that rehandling is required.
Cold or Warm Lock
The frozen food airlock serves as the entrance to the frozen food warehouse and typically must handle a temperature difference of over 50° C. Here, in particular, special requirements are placed on the conveyor system to ensure smooth pallet transport. Depending on the type of transfer chamber selected, a distinction is made between a cold transfer chamber and a warm transfer chamber, both of which are equipped with frozen-food doors and high-speed doors.
Flush-with-the-floor Pallet Loading
The solution is the frozen food airlock with floor-level pallet loading. The pallets are placed directly onto the feed roller conveyor using (electric) hand pallet trucks; the high-speed door (SLT) then closes, and the frozen food door opens. The pallet is transported to a storage roller conveyor in the warehouse; the cold storage door closes immediately, the high-speed door (SLT) then opens, and the transfer station is ready to receive another pallet. Pallets accumulated in the warehouse can be removed and stored using a reach truck or similar equipment. The retrieval process follows the reverse sequence.
