Method for operating a refrigerant circuit as a heat pump and heat pump operable as a refrigerant circuit

US9625188B2 · kind B2 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Peter Satzger · Landsberg am Lech, DE
• Oliver Horn · Munich, DE
• Robert HERBOLZHEIMER · Gröbenzell, DE
• Martin Knott · Balderstone, GB
• Stefan Morgenstern · Stuttgart, DE
• Felix Schedel · Gauting, DE

Key dates

• Filing date: Jun 9, 2015
• Grant date: Apr 18, 2017
• Expiry date: Sep 22, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60H2001/00928
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method of operating a refrigerant circuit as a heat pump is provided. By way of a compressor, refrigerant is compressed and is pumped through a refrigerant/heating heat exchanger. The refrigerant coming from the refrigerant/heating heat exchanger is expanded in at least a first expansion element. The refrigerant expanded by way of the first expansion element flows to a suction input of the compressor through at least one evaporator. At a branch-off point of the refrigerant/heating heat exchanger situated between a refrigerant input and a refrigerant output of the refrigerant/heating heat exchanger, refrigerant is branched off and is guided by way of a second expansion element in the direction of the suction input of the refrigerant compressor.