Refrigerant circulation device, method for circulating refrigerant and acid suppression method
US10443912B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 23, 2014 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Oct 23, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2205/126
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The present invention provides a heat pump device and an organic Rankine cycle device that are capable of maintaining a stable thermal cycle even when an HFO is used as the refrigerant in an environment in which the operating temperature reaches a high temperature. The refrigerant circulation device is filled with a refrigerant comprising a hydrofluoroolefin or hydrochlorofluoroolefin having a carbon-carbon double bond within the molecular structure, and has a region in the refrigerant circulation circuit where the operating temperature of the refrigerant reaches 175° C. or higher, wherein an acid suppression unit which suppresses any increase in the acid concentration in the refrigerant is provided in the region where the operating temperature of the refrigerant can reach 175° C. or higher, and the acid suppression unit contains an acid suppression material comprising at least two materials selected from the group consisting of copper, iron, aluminum, SUS, nickel, titanium, metallic silicon, silicon steel, tin, magnesium and zinc as the main components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.