Selecting control strategy for an expansion valve
US10352607B2 · kind B2 · utility
1Cited by
5References
20Claims
0Family size
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Key dates
| Filing date | Aug 21, 2015 |
| Grant date | Jul 16, 2019 |
| Priority date | — |
| Expiry date | Aug 21, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method for controlling a vapor compression system, in particular an opening degree of an expansion valve. According to a first control strategy, the expansion valve is closed until the superheat value has increased above a lower threshold superheat value. According to a second control strategy, the expansion valve is kept open until the suction pressure has increased above a lower threshold suction pressure value. In the case of low superheat value as well as low suction pressure, the second control strategy is selected for a limited period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.