| 摘要 |
A Refrigerating circuit according to the invention comprises a compressor, a condenser/gas cooler, an expansion device (2), an evaporator (4), and refrigerant conduits circulating a refrigerant therethrough. The evaporator (4) comprises refrigerant piping comprising a plurality of substantially horizontal layers (8, 10) each layer comprising a plurality of pipes (8a-8h, 10a-10h) the pipes being substantially perpendicular to an air flow direction (12) from an air inlet region to an air outlet region of the evaporator (4). A pipe selected from the group of the second pipe (8b) to the last but one pipe (8g) in the bottom layer (8) forms the entry pipe (8c) of the evaporator (4). The entry pipe (8c) is connectable with the expansion device (2) to provide a refrigerating mode, and the entry pipe (8c) is connectable with a hot gas conduit (6) to provide a defrosting mode for the evaporator (4).
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