OUTDOOR UNIT AND REFRIGERATION CYCLE DEVICE

Title:

OUTDOOR UNIT AND REFRIGERATION CYCLE DEVICE

Document Type and Number:

WIPO Patent Application WO/2021/192292

Kind Code:

A1

Abstract:

In the present invention, a refrigeration cycle device (1) is provided with a load device (3) and an outdoor unit (2). The outdoor unit (2) comprises a compressor (10), a condenser (20), a heat exchanger (30), a second expansion valve (40), an injection flow path (101) via which a refrigerant is caused to flow from piping (81) between the outlet of the condenser (20) and the inlet of a first passage (H1), a control device (100), and a notification device (150). The injection flow path (101) is provided with a first refrigerant flow path (91-94), a second refrigerant flow path (96), a liquid receiver (73), a third expansion valve (71), and a flow rate adjustment valve (72). The control device (100) determines whether there is a shortage of the refrigerant on the basis of the opening degree of the flow rate adjustment valve (72) if the discharge pressure of the compressor (10) is in a supercritical state in which the critical pressure of the refrigerant is exceeded.

Inventors:

HAYASAKA MOTOSHI (JP)
ARII YUSUKE (JP)
ISHIKAWA TOMOTAKA (JP)

Application Number:

PCT/JP2020/014278

Publication Date:

September 30, 2021

Filing Date:

March 27, 2020

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

F25B49/02; F25B1/00

Domestic Patent References:

WO2015063838A1

2015-05-07

Foreign References:

JP2009156531A	2009-07-16
JP2007263390A	2007-10-11
JP2015049024A	2015-03-16
JP2009236483A	2009-10-15
JP2010127531A	2010-06-10
JP2013167386A	2013-08-29
JP2014119221A	2014-06-30

Other References: