Global Patent Index - EP 3267130 A1

EP 3267130 A1 20180110 - REFRIGERATION CYCLE DEVICE

Title (en)

REFRIGERATION CYCLE DEVICE

Title (de)

KÄLTEKREISLAUFVORRICHTUNG

Title (fr)

DISPOSITIF À CYCLE FRIGORIFIQUE

Publication

EP 3267130 A1 20180110 (EN)

Application

EP 15883950 A 20150304

Priority

JP 2015056397 W 20150304

Abstract (en)

Provided is a refrigeration cycle apparatus configured to suppress a liquid backflow operation to a compressor during a hot-gas reverse type defrosting operation. A refrigeration cycle apparatus (1) according to the present invention includes a refrigerant circuit (2) including a compressor (21), a flow switching valve (29), a heat source-side heat exchanger (22), a main-expansion valve (24), and a use-side heat exchanger (25) that are connected by refrigerant pipes, and is configured to perform the hot-gas reverse type defrosting operation. The refrigeration cycle apparatus (1) includes a pressure sensor (3) configured to measure pressure on a high-pressure side of the refrigerant circuit, and a controller (4) configured to control the compressor (21), the flow switching valve (29), and the main-expansion valve (24). The main-expansion valve (24) connected between the heat source-side heat exchanger (22) and the use-side heat exchanger (25) is connected in parallel to a series circuit including a sub-expansion valve (26) having a variable opening degree, a refrigerant tank (27) configured to accumulate surplus refrigerant, and a solenoid valve (28) that are connected in series. The controller (4) is configured to control the opening degree of the sub-expansion valve (26) and opening and closing of the solenoid valve (28), based on the pressure measured by the pressure sensor (3).

IPC 8 full level

F25B 47/02 (2006.01); F25B 1/00 (2006.01)

CPC (source: EP)

F25B 1/00 (2013.01); F25B 13/00 (2013.01); F25B 41/04 (2013.01); F25B 45/00 (2013.01); F25B 47/02 (2013.01); F25B 47/025 (2013.01); F25B 49/02 (2013.01); F25B 2341/0661 (2013.01); F25B 2345/003 (2013.01); F25B 2400/0411 (2013.01); F25B 2500/28 (2013.01); F25B 2600/2501 (2013.01); F25B 2600/2513 (2013.01); F25B 2600/2519 (2013.01); F25B 2700/1931 (2013.01)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3267130 A1 20180110; EP 3267130 A4 20181107; EP 3267130 B1 20191009; JP 6545252 B2 20190717; JP WO2016139783 A1 20170914; WO 2016139783 A1 20160909

DOCDB simple family (application)

EP 15883950 A 20150304; JP 2015056397 W 20150304; JP 2017503277 A 20150304