Method and apparatus for control of carbon dioxide gas cooler pressure by use of a capillary tube
US7131294B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2004 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Jan 29, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2600/17
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A transcritical vapor compression system that includes a fluid circuit circulating a refrigerant in a closed loop. The fluid circuit has operably disposed therein, in serial order, a compressor, a first heat exchanger, a first capillary tube and a second heat exchanger. The compressor compresses the refrigerant from a low pressure to a supercritical pressure. The first heat exchanger is positioned in a high pressure side of the fluid circuit and the second heat exchanger is positioned in a low pressure side of the fluid circuit. The first capillary tube reduces the pressure of the refrigerant from a supercritical pressure to a relatively lower pressure. The refrigerant flows through the first capillary tube at its critical velocity and means for controlling the temperature of the refrigerant in the first capillary tube are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.