OUTDOOR UNIT AND REFRIGERATION CYCLE DEVICE

Title:

OUTDOOR UNIT AND REFRIGERATION CYCLE DEVICE

Document Type and Number:

WIPO Patent Application WO/2021/048905

Kind Code:

A1

Abstract:

An outdoor unit (2) is provided with: a first flow path (F1); a second flow path (F2); and a control device (100). A compressor (10) and a condenser (20) are arranged in order from a refrigerant inlet port (PI2) toward a refrigerant outlet port (PO2) on the first flow path (F1). The second flow path (F2) branches from a part between the condenser (20) and the refrigerant outlet port (PO2) on the first flow path (F1), and is configured to return a refrigerant having passed through the condenser (20) to the compressor (10). A first expansion valve (71), a liquid receiver (73), and a second expansion valve (72) are arranged on the second flow path (F2) in order from a branch point of the second flow path (F2) from the first flow path (F1) . The control device (100) controls the compressor (10), the first expansion valve (71), and the second expansion valve (72). The control device (100) provides notification regarding a shortage of the refrigerant if the duration, in which opening of the second expansion valve (72) is at an upper limit opening, exceeds a determination time.

Inventors:

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

Application Number:

PCT/JP2019/035407

Publication Date:

March 18, 2021

Filing Date:

September 09, 2019

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

F25B49/02; F25B1/00

Domestic Patent References:

WO2017199391A1	2017-11-23
WO2017199391A1	2017-11-23

Foreign References:

JP2010156536A	2010-07-15
JPH05288438A	1993-11-02
JP2013087966A	2013-05-13
JP2013164242A	2013-08-22
JP2011226704A	2011-11-10

Other References: