Pressure controlled switching valve for refrigeration system
US5156016A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1992 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Feb 3, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B41/20
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A refrigerant flow switching device for alternatively conveying flow of refrigerant from either a high presure or a low pressure evaporator to a compressor of a refrigeration system and a refrigerator using such a refrigeration system. The device utilizes the pressure difference between the higher pressure refrigerant from the high pressure evaporator and the lower pressure refrigerant from the low pressure evaporator or atmospheric pressure to open and close a first flow controller of the device positioned in a conduit leading from the high pressure evaporator to the compressor. The device further comprises a second flow controller, such as a check valve positioned in a conduit leading the low pressure evaporator to the compressor, which stays open only when the first flow controller is closed. The first flow controller comprises a bellows which is expanded from a first position to a second position by the pressure of refrigerant from the high pressure evaporator against a constant force provided by a compression spring, positioned against the bellows. The bellows attached through "U" shaped preloaded springs to a gate having an orifice causes the gate orifice to snap open or clos…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.