ABNORMALITY DETERMINATION DEVICE, FREEZING DEVICE INCLUDING THIS ABNORMALITY DETERMINATION DEVICE, AND ABNORMALITY DETERMINATION METHOD FOR COMPRESSOR

WIPO Patent Application WO/2020/067295

A1

This abnormality determination unit (60) includes: a calculation unit (66) which calculates a deviation degree from a normal state of a compressor (11) on the basis of data related to the operation of a freezing device (1); and a determination unit (67) which determines whether there is an abnormality in the compressor (11) on the basis of the calculation result from the calculation unit (66) or predicts an abnormality occurrence time. The calculation unit (66) calculates a first index value calculated from data pertaining to the operation of the freezing device in a first period among data pertaining to the operation of the freezing device (1) and a second index value calculated from data pertaining to the operation of the freezing device (1) in a second period that has a different length from the first period. The calculation unit (66) calculates the deviation degree from the normal state of the compressor (11) on the basis of the first index value and the second index value. The determination unit (67) determines whether there is an abnormality in the compressor (11) on the basis of the deviation degree from the normal state of the compressor (11), or predicts the abnormality occurrence time.

SATOU KIICHIROU (JP)
NAKANO MASATAKA (JP)

PCT/JP2019/037873

April 02, 2020

September 26, 2019

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DAIKIN IND LTD (JP)

F25B49/02; F25D11/00

JP2009002650A	2009-01-08
JP2003214735A	2003-07-30
JP2015222151A	2015-12-10
JP2003161495A	2003-06-06
JP2006064307A	2006-03-09
JP2014098515A	2014-05-29

See also references of EP 3859250A4

FUKUI Hiroshi (JP)

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