Heat cycle system

Patent metadata

Field	Value
Publication number	US-11548267-B2
Application number	US-201916285257-A
Country	US
Kind code	B2
Filing date	Feb 26, 2019
Priority date	Aug 29, 2016
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A heat cycle system is a heat cycle system ( 1 ) using a working medium containing hydrofluoroolefin (HFO) that has a double bond in a molecule structure, the heat cycle system ( 1 ) having a compressor ( 10 ), a high-pressure side heat exchanger ( 12 ), a low-pressure side heat exchanger ( 14 ), an expansion mechanism ( 13 ), and an acid detection means ( 40 ) which is disposed in a discharge pipe ( 21 ) connecting the compressor ( 10 ) and the high-pressure side heat exchanger ( 12 ) and which detects acid generated by decomposition of the working medium in a heat cycle.

First claim

What is claimed is:

1. A heat cycle system, comprising a working medium containing hydrofluoroolefin (HFO), the heat cycle system comprising:
a compressor;
a high-pressure side heat exchanger;
a low-pressure side heat exchanger;
an expansion mechanism; and
an acid detector to detect acid generated by decomposition of the working medium, the acid detector being provided in a discharge pipe connecting the compressor and the high-pressure side heat exchanger,
wherein the acid detector comprises a sight glass having an observation window to observe the working medium passing inside the discharge pipe,
wherein the observation window has a double structure, wherein in the observation window, at least a surface on a side to be in contact with the working medium is formed of glass, wherein a surface of the glass is colored by the presence of acid, and a surface on an opposite side to the side to be in contact with the working medium is formed of an acid-resistant transparent member.

2. The heat cycle system according to claim 1 ,
wherein the observation window is formed to have a larger thickness than a thickness necessary to maintain pressure resistance performance.

3. The heat cycle system according to claim 1 ,
wherein the sight glass is provided in a trap portion of the discharge pipe.

4. The heat cycle system according to claim 1 ,
wherein the HFO contains 1,1,2-trifluoroethylene.

5. The heat cycle system according to claim 1 , wherein the acid-resistant transparent member is an acrylic resin.

Assignees

• Agc Inc

Inventors

• Hayamizu Hiroki
• Fukushima Masato
• Takagi Hirokazu

Classifications

• C09K5/04

  the change of state being from liquid to vapour or vice versa · CPC title

• B32B17/10 Primary

  of synthetic resin · CPC title

• G01N21/783

  for analysing gases · CPC title

• F25B2500/04

  Clogging · CPC title

• F16L55/24

  Preventing accumulation of dirt or other matter in pipes, e.g. by traps, by strainers · CPC title