Title:
OIL CONCENTRATION DETECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/209429
Kind Code:
A1
Abstract:
This concentration detection system (1) comprises: an oil concentration sensor (55) disposed in a fluid, which contains refrigerant and refrigeration machine oil, inside a compressor (10); a measurement part (101) that obtains a first index indicating the concentration of the refrigeration machine oil on the basis of a predetermined relational expression indicating the relationship between a detection value of the oil concentration sensor (55) and the oil concentration of the refrigeration machine oil; and a correction unit (102) that obtains a second index indicating the saturation concentration of the refrigeration machine oil when the refrigerant is superheated, and at the same time, corrects the predetermined relational expression on the basis of the difference between the first index and the second index at the same degree of superheating, wherein the correction unit (102) corrects the first index on the basis of the corrected predetermined relational expression.
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Inventors:
HANAZAKI TOMOYA (JP)
IKEBE HIROKI (JP)
YAMAGUCHI JUNKI (JP)
IKEBE HIROKI (JP)
YAMAGUCHI JUNKI (JP)
Application Number:
PCT/JP2022/007162
Publication Date:
October 06, 2022
Filing Date:
February 22, 2022
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B49/02; F04B39/04
Domestic Patent References:
| WO2020058004A1 | 2020-03-26 |
Foreign References:
| JP2019215140A | 2019-12-19 | |||
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Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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