High efficiency heat exchange for refrigeration suction line/capillary tube assembly
US4147037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1978 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Feb 21, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2400/054
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A suction line/capillary tube assembly which provides improved heat exchange between the cool gaseous refrigerant conveyed by the suction line and the warm liquid refrigerant conveyed by the capillary tube in a refrigeration system. The assembly is generally characterized by the capillary tube being within and in direct thermal contact with the suction line wall along a substantial length thereof, which length is at least approximately two feet. In a first specific embodiment, the capillary tube is soldered to the inside of the suction line, as opposed to merely being loosely passed therethrough. In a second specific embodiment, an aluminum suction line is fabricated with an internal extruded channel defined between a pair of ridges extending from the interior surface of the suction line. A copper capillary tube is snugly positioned in the channel and preferably the ridges are deformed toward each other so as to substantially surround the capillary tube. In a method of providing a suction line/capillary tube assembly as contemplated by the second specific embodiment, the operation of deforming the ridges is accomplished by forcing a closure tool through the suction line. In a third…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.