US4911235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate heat exchanger
Assignee: Alfa Laval Thermal AB
•
Filing: 1989-04-26
•
Granted: 1990-03-27
•
Expires: 2009-04-26
Abstract
Abstract A plate heat exchanger especially adapted for viscous fluids or fluids containing fibers has spacing means extending above the normal corrugations thus widening the normal interplate channels and the inlets and outlets to and from said channels are formed by juxtaposing the plates containing ports forming said inlets and outlets to give the maximum throughflow.
Inventors
- 👤 Jarl Andersson
- 👤 Jan-Ove Bergqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:21
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
244 words
In a plate heat exchanger comprising a number of heat exchange plates mounted between a frame plate and a pressure plate and forming channels between adjacent plates for the throughflow of two heat exchange media, every second one of said channels being connected with an inlet and an outlet for a first medium and the other being connected with an inlet and an outlet for a second medium, each of said plates having four ports and being provided with a pressed gasket groove on one of its sides enclosing only two of said ports and an intermediate heat exchange portion of the plate, a corrugation pattern of ridges and valleys being pressed in the heat exchange portion of each plate, which ridges cross and abut each other in the channels for said first heat exchange medium, all of the gasket grooves in the plates being turned in the same direction and containing gaskets sealing adjacent plates, the improvement comprising spacing means pressed out of at least every second one of the heat exchange plates into the channels for said second medium, said spacing means having a height above that of said corrugation pattern, plate portions forming opposing ports outside of the gasket defining each channel for said first medium being located and placed in contact with each other to form as large throughflow areas as possible for said second medium near the ports situated inside the gaskets defining the channels for said second medium.
Claim 2
Dependent Claim
244 words
In a plate heat exchanger comprising a number of heat exchange plates mounted between a frame plate and a pressure plate and forming channels between adjacent plates for the throughflow of two heat exchange media, every second one of said channels being connected with an inlet and an outlet for a first medium and the other being connected with an inlet and an outlet for a second medium, each of said plates having four ports and being provided with a pressed gasket groove on one of its sides enclosing only two of said ports and an intermediate heat exchange portion of the plate, a corrugation pattern of ridges and valleys being pressed in the heat exchange portion of each plate, which ridges cross and abut each other in the channels for said first heat exchange medium, all of the gasket grooves in the plates being turned in the same direction and containing gaskets sealing adjacent plates, the improvement comprising spacing means pressed out of at least every second one of the heat exchange plates into the channels for said second medium, said spacing means having a height above that of said corrugation pattern, plate portions forming opposing ports outside of the gasket defining each channel for said first medium being located and placed in contact with each other to form as large throughflow areas as possible for said second medium near the ports situated inside the gaskets defining the channels for said second medium.
Claim 3
Dependent Claim
27 words
The plate heat exchanger according to claim 1, and comprising elongated spacing means extending substantially between the two communicating ports in at least some of said channels.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |