Method and apparatus for initiating coil defrost in a refrigeration system evaporator
US9188381B2 · kind B2 · utility
4Cited by
13References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 21, 2014 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Jul 11, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D21/006
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A system for controlling the defrost cycle of an evaporator comprising a sensor in the coil of an evaporator or downstream of the coil, the sensor configured to determine changes in the liquid mass ratio of the refrigerant in the evaporator. The difference in liquid mass ratio relating to frost buildup on the outside of said evaporator. When the difference in liquid mass ratio reaches a predetermined amount, corresponding to an unsatisfactory frost buildup, a defrost cycle is initiated. When the liquid mass ratio returns to a value that corresponds to a defrosted evaporator, the defrost cycle is discontinued.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.