Method for refrigerant and oil collecting operation and refrigerant and oil collection controller
US7178347B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2001 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Oct 20, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2400/19
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method for refrigerant and oil collecting operation capable of assuring the cleanliness of the inside of an existing communication pipe at a low cost and installing, at a low cost, a new air conditioner, comprising a compressor (1), a heat source side heat exchanger (3), a decompressing mechanism (4), and a user side heat exchanger (5), comprising the steps of performing a pipe heating operation in a heating operation mode and performing a refrigerant and oil collecting operation to collect refrigerant to a heat source side heat exchanger (3), namely, with the refrigerant heated to a temperature higher than that where contaminants such as refrigerator oil inside a refrigerant circuit is dissolved into the refrigerant, performing the refrigerant and oil collecting operation so as to assure the cleanliness of the inside of the existing communication pipes (7, 8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.