Compression refrigeration machine

US5671607A · kind A · utility

Assignee

• SEP Gesellschaft fur technische Studien Entwicklung Planung mbH · DE

Inventors

• Herbert Clemens · Munich, DE
• Ulrich Plantikow · Düsseldorf, DE
• Detlef Wusthoff · Berlin, DE

Key dates

• Filing date: Nov 7, 1995
• Grant date: Sep 30, 1997
• Expiry date: Nov 7, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B30/70
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

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.