Condensing heat-exchange copper tube for an flooded type electrical refrigeration unit
US7762318B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2006 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | May 6, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28D2021/007
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The present invention discloses a condensing heat-exchange copper tube for a flooded type electrical refrigeration unit, which comprises a smooth surface portion, a finned portion provided with plurality of fins and a transitional portion connecting the smooth surface portion to the finned portion. Said fin includes a fin base close to the outer surface of the heat-exchange tube and a fin top away from the outer surface. Said fin is further provided with a secondary fin at the central portion of the fin and a third fin at the top portion of the fin, wherein a certain distance is provided between two axially adjacent secondary fins or two axially adjacent third fins. Secondary fins as well as third fins according to the invention further increase the heat transfer area for the heat-exchange tube. Meanwhile, secondary fins and third fins help to attenuate the condensate film such that the condensate film is substantially eliminated, and vapor condensation and heat transfer may be carried out in a better way. At the same time, secondary fins and third fins help to guide the condensate film away from the surface of the heat-exchange tube such that heat resistance may be reduced. Thus, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.