Evaporator pressure regulating valve controlled by an auxiliary force for a refrigerator installation
US4934156A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1989 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Jun 30, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7764
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a refrigeration system there is provided a main valve that has its inlet port fluidly connected to an evaporator while its outlet port is fluidly connected to the suction port of a motor-compressor. The closing of the main valve is controlled by an auxiliary valve, the auxiliary valve being connected in an auxiliary line that at one end opens to the gas port of a condenser or to a line between the condenser and the motor compressor. The auxiliary valve is connected in the auxiliary line in series with a fixed throttle and is downstream of the throttle. The closure member of the auxiliary valve opens on an increase in the evaporator pressure. A check valve, for example a two way magnetic valve, is connected between the auxiliary valve and the suction port. An auxiliary chamber, when the auxiliary valve is in an open condition establishes an open fluid flow path from the evaporator to the magnetic valve, the pressure in the auxiliary chamber acting against the main valve closure member for urging it toward its closed condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.