| 摘要 |
A refrigeration apparatus (10) contains an oil sump (30) which houses an oil reservoir (32) defined by a wall (40). The apparatus (10) also contains at least one oil sump heater (36, 37) in thermal contact with the wall (40). The heater (36, 37) is associated with a structure (34, 35) for localizing heat output from the heater (36, 37). The oil sump heater (36, 37) is in a substantially non-contacting relationship with any oil in the sump (30). The structure (34, 35) for localizing heat output from the heater (36, 37) may contain a cavity (34, 35). This cavity (34, 35) may contain the oil sump heater (36, 37). The oil sump heater (36, 37) does not substantially contact the oil to avoid oil-coking and to eliminate an oil-leak path from the reservoir (32).
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