REFRIGERATION CYCLE DEVICE - MITSUBISHI ELECTRIC CORP

Title:

REFRIGERATION CYCLE DEVICE

Document Type and Number:

WIPO Patent Application WO/2018/078883

Kind Code:

A1

Abstract:

This refrigeration cycle device (100) circulates a refrigerant through a compressor (1), an oil separator (2), a condenser (3), an expansion valve (4), an evaporator (5), and an accumulator (6) in this order. This refrigeration cycle device (100) comprises: an oil returning passage (21) which leads to the compressor (1) from the oil separator (2); a solenoid valve (7) which is provided on the oil returning passage (21); an oil returning passage (22) which leads to the compressor (1) from the accumulator (6); a solenoid valve (8) which is provided on the oil returning passage (22); and a control device (30) which controls the opening of the solenoid valve (7) and the opening of the solenoid valve (8). Preferably, the refrigeration cycle device (100) further comprises a self-heating sensor (91E) which detects the oil level position of refrigeration oil in the compressor (1). If the output of the self-heating sensor (91E) shows a shortage of the refrigeration oil in the compressor (1) at a first time point, the control device (30) increases the opening of the solenoid valve (8), whereas if the output of the self-heating sensor (91E) shows a shortage of the refrigeration oil in the compressor (1) at a second time point after the first time point, the control device (30) increases the opening of the solenoid valve (7).

Inventors:

MATSUDA HIROFUMI (JP)
YANACHI SATORU (JP)

Application Number:

PCT/JP2016/082348

Publication Date:

May 03, 2018

Filing Date:

October 31, 2016

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

F25B1/00; F25B43/02; F25B49/02

Foreign References:

JP2014181869A	2014-09-29
JPH03127165U	1991-12-20
JPH01302072A	1989-12-06
JP2014145554A	2014-08-14
JP2001012351A	2001-01-16

Other References: