Control arrangement for controlling superheat
US9874385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2013 |
| Grant date | Jan 23, 2018 |
| Priority date | — |
| Expiry date | Mar 29, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/21175
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A control arrangement for controlling a superheat of a vapour compression system includes a first sensor and a second sensor for measuring control parameters allowing a superheat value to be derived, a first controller arranged to receive a signal from the first sensor, a second controller arranged to receive a superheat value derived by a subtraction element, and to supply a control signal, based on the derived superheat value and a reference superheat value, and a summation element arranged to receive input from the the controllers, the summation element being arranged to supply a control signal for controlling opening degree of the expansion device. According to a first aspect the control arrangement includes a low pass filter arranged to receive a signal from the first sensor and to supply a signal to the subtraction element. According to a second aspect the first controller includes a PD element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.