Method and apparatus for refrigeration system control having electronic evaporator pressure regulators
US6578374B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2002 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Aug 28, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D2700/16
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method for refrigeration system control according to the invention includes identifying a lead circuit having a lowest temperature set point from a plurality of circuits, wherein each circuit includes at least one refrigeration case. The suction pressure set point for a compressor rack is initialized based upon the identified lead circuit, and a change in suction pressure set point is determined based on measured parameters from the lead circuit. The suction pressure set point is updated based upon the change in suction pressure set point. A first valve position for a first electronic evaporator pressure regulator associated with a first refrigeration circuit is determined based on the determined change in suction pressure set point, which is based upon the measured parameters from the lead circuit. A second valve position for a second electronic evaporation pressure regulator associated with a second refrigeration circuit is based upon a second measured parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.