Modulated electrically operated refrigerant expansion valve
US4892285A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Apr 29, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solenoid operated refrigerant expansion valve for providing control of refrigerant flow with a modulated electrical signal having a valve block with an armature guide post cantilevered therefrom with a tubular valve spool slidably received thereon and a cover thereover attached to the block which forms a valving chamber communicating with the inlet, the guide post has a cavity formed therein which communicates with the outlet and cross ports which are valved by movement of the spool. The free end of the guide post is registered in a recess formed in the cover. The cover has a controlled clearance over the valve member to provide viscous dampening thereof. A coil and pole frame are received over the cover and retained thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.