Search International and National Patent Collections

1. (WO2018105041) REFRIGERATION CYCLE APPARATUS

Pub. No.:    WO/2018/105041    International Application No.:    PCT/JP2016/086270
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Wed Dec 07 00:59:59 CET 2016
IPC: F25B 49/02
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
MITSUBISHI ELECTRIC BUILDING TECHNO-SERVICE CO.,LTD.
三菱電機ビルテクノサービス株式会社
Inventors: NAKAMURA, Takaharu
中村 貴玄
OCHIAI, Yasutaka
落合 康敬
KOMATSU, Kazuhiro
小松 一宏
ARAI, Yosuke
荒井 洋介
Title: REFRIGERATION CYCLE APPARATUS
Abstract:
A control device of this refrigeration cycle apparatus includes: an operation state acquisition unit that successively acquires data at least including as components thereof, time, the rotational speed of a compressor, the detection result from a liquid surface sensor, first pressure, and second pressure; a classification unit that classifies a plurality of data sets of which the time is included in a period from a first time to a second time that is later than the first time, according to a plurality of rotational speed ranges relating to the rotational speed and a plurality of liquid surface height ranges relating to the liquid surface; a determination reference value acquisition unit that acquires a determination reference value indicating the deterioration trend of the compressor on the basis of the first pressure and the second pressure of the data sets classified by the classification unit; and a deterioration determination unit that determines the deterioration of the compressor by using the determination reference value.