Bi-directional refrigerant expansion valve
US5966960A · kind A · utility
10Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1998 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Jun 26, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2500/12
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An automotive air conditioning system orifice tube type refrigerant expansion valve is axially symmetrical, so as to be error proof at installation, and/or so as to operate in a bi directional refrigerant flow. A pair of coaxial screens surrounding each end of the orifice tube, an inner noise attenuation screen of finer mesh, and an outer particulate screen of coarser mesh, provide upstream particulate exclusion and downstream noise attenuation without the potential for reverse installation. In addition, by pass ports allow for a by pass flow should the downstream inner screen become plugged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.