Plate heat exchanger
US8857504B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2008 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Jul 30, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F2275/04
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A plate heat exchanger includes a plurality of heat exchanger plates. The plates are provided beside each other and permanently joined to each other to form a plate package having first plate interspaces and second plate interspaces. Each plate has a heat transfer area and four porthole areas defined by a porthole edge. Each of the porthole areas includes an annular flat area located at one of a primary and secondary level, and a set of inner portions on the annular flat area at the other of the primary and secondary level. Each inner portion has an inner part adjoining the porthole edge and an outer segment adjoining the inner part and having an angular extension of at least 180°. The outer segment has a continuous contour and a radius R, which is allowed to vary within the range 0.8R≦R≦1.2R.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.