Method of operating a refrigeration cycle apparatus

US12392531B2 · kind B2 · utility

Assignee

• Viessmann Climate Solutions SE · DE

Inventors

• Ulrich Hafner · Möckmühl, DE
• Christopher WREDE · Medebach, DE

Key dates

• Filing date: Oct 6, 2021
• Grant date: Aug 19, 2025
• Expiry date: Jun 25, 2042

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25B2700/171
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A method of operating a refrigeration cycle apparatus uses a compressor to compress a coolant. The compressed coolant is fed to a condenser for release of heat, the condensed coolant is later fed to a primary side of an internal heat exchanger for release of heat, and the cooled coolant is guided through an expansion device. The coolant expanded in the expansion device is fed to an evaporator for absorption of heat, the evaporated coolant is later fed to a secondary side of the internal heat exchanger for absorption of heat, and the heated coolant is fed to the compressor. For suction gas temperature control, an amount of heat transferred from the primary side to the secondary side of the internal heat exchanger is controlled with the aid of an additional expansion device arranged parallel to the heat exchanger and between the condenser and the evaporator.