Air conditioning circuit using a refrigerant fluid in the supercritical state, in particular for a vehicle
US6178761A · kind A · utility
24Cited by
5References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 26, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | May 26, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2600/0253
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The CO.sub.2 refrigerant fluid, compressed by the compressor to a supercritical pressure, is delivered through a three-way valve selectively into a cooler and/or into a bypass branch, so that in the former case, after passing through an expansion device, the fluid is vaporised in an evaporator so as to cool the cabin of the vehicle; while flow of the fluid through the bypass branch avoids the cooler so that the fluid is then cooled in the evaporator, thereby heating the cabin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.