Heat exchanger plate and plate heat exchanger comprising such a heat exchanger plate

Patent metadata

Field	Value
Publication number	US-9759494-B2
Application number	US-201314428390-A
Country	US
Kind code	B2
Filing date	Oct 10, 2013
Priority date	Oct 30, 2012
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A heat exchanger plate has a vertical center axis dividing the plate into a left and a right half delimited by a first and second long side, respectively. A horizontal center axis divides the plate into an upper and a lower half delimited by a first and second short side, respectively. The plate includes a port hole with a reference point that coincides with a center point of a biggest imaginary circle that can be fitted into the port hole. The port hole is arranged within the left half and the upper half. The porthole has a form defined by a number of corner points of an imaginary plane geometric figure of which at least one is displaced from an arc of the circle, and the same number of thoroughly curved lines connecting the corner points. The corner points include first, second and third corner points.

First claim

The invention claimed is:

1. A heat exchanger plate having a vertical center axis dividing the heat exchanger plate into a left and a right half delimited by a first and second long side, respectively, a horizontal center axis dividing the heat exchanger plate into an upper and a lower half delimited by a first and second short side, respectively, and a port hole with a reference point coinciding with a center point of a biggest imaginary circle that can be fitted into the port hole, the port hole being arranged within the left half and the upper half, wherein the porthole has a form defined by
a number of corner points of an imaginary plane geometric figure of which at least one is displaced from an arc of the circle, and
the same number of curved lines having no straight parts and connecting the corner points,

wherein a first corner point of the corner points is arranged closest to a transition between the first short side and the first long side and on a first distance from the reference point, a second one of the corner points is arranged closest to the first corner point in a clockwise direction and on a second distance from the reference point and a third one of the corner points is arranged closest to the first corner point in a counter clockwise direction and on a third distance from the reference point, the port hole having one symmetry axis only which extends through the first corner point and the reference point.

2. A heat exchanger plate according claim 1 , wherein the number of corner points and curved lines is equal to three.

3. A heat exchanger plate according to claim 1 , wherein the curved lines are concave seen from the reference point of the port hole.

4. A heat exchanger plate according to claim 1 , wherein the first distance between the first corner point and the reference point is smaller than the second distance between the second corner point and the reference point.

5. A heat exchanger plate according to claim 1 , wherein the first distance between the first corner point and the reference point is smaller than the third distance between the third corner point and the reference point.

6. A heat exchanger plate according to claim 1 , wherein the upper half of the heat exchanger plate comprises a first area provided with a first corrugation pattern, a second area provided with a second corrugation pattern and a third area provided with a third corrugation pattern, the second and third areas being arranged in succession along the vertical center axis of the heat exchanger plate with the second area closest to the first short side, the second area adjoining the third area along a second border line, and the second and third corrugation patterns differing from each other, and wherein a fourth imaginary straight line extends from the reference point, through one of the corner points and to an end point of the second border line that is arranged closest to the first long side.

7. A plate heat exchanger comprising a heat exchanger plate according to claim 1 .

Assignees

• Alfa Laval Corp Ab

Inventors

• Nilsson Johan
• Hedberg Magnus

Classifications

• F28D9/005

  the plates having openings therein for both heat-exchange media · CPC title

• F28F3/08 Primary

  Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning · CPC title

• F28D9/0043

  the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another · CPC title

• F28F3/083

  capable of being taken apart · CPC title

• F28F3/046 Primary

  the deformations being linear, e.g. corrugations · CPC title