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1. (WO2013117187) HEAT PUMP APPARATUS

Pub. No.:    WO/2013/117187    International Application No.:    PCT/DE2013/100033
Publication Date: Fri Aug 16 01:59:59 CEST 2013 International Filing Date: Thu Jan 31 00:59:59 CET 2013
IPC: F25B 43/00
Applicants: VIESSMANN WERKE GMBH & CO. KG
Inventors: HAFNER, Ulrich
IMMEL, Markus
Title: HEAT PUMP APPARATUS
Abstract:
The invention relates to a heat pump apparatus, comprising a compressor (1), downstream of which a liquefier (2) is connected, downstream of which a refrigerant collector (3) is connected that, for the intermediate injection of refrigerant into the compressor (1), is connected to the compressor via a refrigerant line (4). According to the invention, in order to set the refrigerant level in the refrigerant collector (3), a controllable expansion valve (5) is arranged between the liquefier (2) and the refrigerant collector (3) and, depending on the setting of the expansion valve (5), the refrigerant line (4) has a refrigerant feed opening (6) opening above and/or below the refrigerant level during the operation of the heat pump apparatus.