Flow regulating valve apparatus for air conditioning systems
US6058730A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Oct 1, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/025
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A flow regulating valve (100) for an air conditioning system is shown in which a body member (104) is provided with a fixed passageway (104a) and a variable passageway (104b) which results in regulating flow of refrigerant into the evaporator of the air conditioning system. Under high ambient and low or idle speeds, the system refrigerant pressure rises. This increases pressure in the evaporator and an increase in the saturation temperature of refrigerant in the evaporator. This increase in temperature is sensed by a helical thermostatic metal element (110) which moves to rotate an inlet sleeve (112) having a web (104c) formed between first and second windows (112a, 112b) to move into alignment with the inlet port (104c) of passageway (104b) to increase restriction to the flow of the refrigerant fluid through the valve thereby decreasing pressure of the refrigerant entering the evaporator. Upon continued increase in ambient temperature, the web continues to rotate bringing window (112b) into alignment with the inlet (104c) to increase refrigerant flow to prevent excessive pressure build-up in the compressor with resulting compressor cycling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.