Compression refrigeration machine
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United States of America Patent
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-
Sep 30, 1997
Grant Date -
N/A
app pub date -
Nov 7, 1995
filing date -
Nov 7, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A compression refrigeration machine is provided having ammonia as a refriant and including a condenser, a throttle device, an evaporator device, and a motor-compressor unit. The motor compressor unit includes an electric motor that drives a compressor and may be arranged in a semi-hermetic or hermetic encapsulation. In an hermetic encapsulation, the electric motor is located outside a suction gas stream flowing into the compressor and outside a discharge gas stream exiting from the compressor so that the electric motor is only exposed to an essentially static ammonia atmosphere. The motor-compressor unit and the semi-hermetic encapsulation are composed of materials stable or resistant to ammonia.
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