Plate heat exchanger

• US 4,489,778 A
• Filed: 03/02/1983
• Issued: 12/25/1984
• Est. Priority Date: 03/04/1982
• Status: Expired due to Fees

• Current Assignee: Malte Skoog
• Original Assignee: Malte Skoog
• Inventors: Skoog, Malte
• Primary Examiner(s): Richter, Sheldon J.
• Application Number:
  US06/471,288
• Time in Patent Office: 664 Days
• Field of Search: 165/166, 165/167
• US Class Current: 165/166
• CPC Class Codes: F28D 9/00 Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall F28F3/083, F28F3/086 take precedence
• CPC Class Codes: F28D 9/005 the plates having openings therein for both heat-exchange media
• CPC Class Codes: F28F 3/046 the deformations being linear, e.g. corrugations
• CPC Class Codes: F28F 3/083 capable of being taken apart

Abstract

A heat exchanger comprising a plurality of plates arranged adjacent to each other, whereby passages for two mutually heat exchanging fluids are formed between the plates. The plates comprise corrugations or ridges, whereby the corrugations form an angle with the longitudinal rim of the plate. In the first type of plates the corrugations form a first angle with said rim and in the second type of plates the corrugations form a second angle with the rim. The plates are combined in order to form two types of passages having different thermal length. The first type of passage is obtained by combining a first plate and a second plate and the second type of passage is formed by combining a first plate and a second plate, wherein one of the plates is turned 180° in its own plane. Thus, two types of passages having different thermal lengths are obtained. The two types of passages can be combined for each heat exchanging fluid in order to provide the desired thermal length for that fluid.

Claims

1. Heat exchanger comprising a plurality of plates (5, 6), provided with corrugations (7, 8) and arranged adjacent to each other in order to define sealed passages (9, 1O) therebetween for enclosing two separate mutually heat exchanging fluids, said plates being of a first type in which the corrugations form a first angle (α

₁) with the longitudinal rim of the plate, and of a second type in which the corrugations form a second angle (α

₂) with the longitudinal rim of the plate, and at least a portion of said plurality of plates being alternately arranged, i.e. a plate of the first type is followed by a plate of a second type and so on, wherein in said portion of alternately arranged plates a plurality of a first couple of plates are arranged with the corrugations thereof directed in the same direction, whereby the corrugations intersect at a first angle (β

₁) in order to define first passages having a first thermal length, and a plurality of a second couple of plates are arranged with the corrugations thereof directed in the opposite directions, whereby the corrugations intersect at a second angle (β

₂) in order to define second passages having a second thermal length.

2. Heat exchanger according to claim 1, wherein for at least one of the heat exchanging fluids a certain number of first and second passages are combined in order to achieve the desired thermal length for the fluid.

3. Heat exchanger according to claim 2, wherein for both heat exchanging fluids a certain number of first and second passages are combined in order to achieve the desired thermal lengths for the fluids.

4. Heat exchanger according to claim 1, wherein the ratios between the number of first passages and the number of second passages are different for the two heat exchanging fluids.