ALFA LAVAL CORPORATE AB

A heat exchanger plate has two opposite parallel primary sides and two opposite parallel secondary sides, and a longitudinal central axis parallel with the primary sides. The plate includes a heat exchanging area with ridges and valleys having a longitudinal extension defining an inclination relative to the longitudinal central axis, four portholes, with at least two located at a respective corner of the plate extending through the plate, a first set of ridges and valleys and a second set of ridges and valleys. The longitudinal extension of the first set of ridges/valleys defines a first angle relative to a first primary side and the longitudinal extension of the second set of ridges/valleys defines a second angle relative to a second primary side. An intersection between the first set of ridges/valleys and the second set of ridges/valleys defines a transition area comprising a curvature of ridges/valleys concentric with a porthole.

A heat exchanger assembly is proposed comprising: a heat exchanger forming one or more electrically connected partitions separating a first fluid and a second fluid. The assembly further comprises: a first electrical connector and a second electrical connector that are operationally connected to the partitions of the heat exchanger and an electrical power source operationally connected to the first electrical connector and the second electrical connector. The electrical power source is configured to supply an electric current to the one or more partitions of the heat exchange via the first electrical connector and the second electrical connector.

A heat exchanger includes heat exchanger plates, first and second sets of channels, and in each channel in the first and second set fin structures are positioned between the heat exchanger plates. In a first channel of the first set, a first fin structure comprises at least first and second parts. In a first channel of the second set, the first channel of the second set is a neighbouring channel to the first channel of the first set, and a second fin structure comprises at least first and second parts. An interface between the first and second parts of the first fin structure extends across the fin direction and is at a first position, an interface between the first and second parts of the second fin structure extends across the fin direction and is at a second position, and the first and second positions are separated from each other.

To fasten a gasket to a heat transfer plate, an attachment device includes a connection member, a first finger, a second finger and a bridge. A first connection part of the connection member is arranged to engage with the gasket and a second connection part of the connection member engages with the bridge. A connection part of the first finger engages with the bridge and a connection part of the second finger engages with the bridge. The first and second fingers are arranged to extend from the bridge towards the gasket. The connection member extends between the first and second fingers. The connection member includes a first portion with a first width and a second portion with a second width. The second portion is arranged closer to the bridge than the first portion, and the second width is smaller than the first width.

A heat exchanger includes a stack of heat exchanger plates, and first and second sets of channels. In each channel in the respective set of channels fin structures are between the plates. Each plate includes first and second inlet ports, and first and second outlet ports at a respective corner portion and extending through the stack. A distribution structure is at the respective inlet port and a collection structure is at the respective outlet port. The distribution structure, respectively the collection structure is positioned between the port and the respective fin structure. An internal interface between the respective distribution structure and the fin structure and/or an internal interface between the respective collection structure and the fin structure in the respective channel of the first channel set and/or in the respective channel of the second channel set is inclined relative to both the longitudinally extending fin direction and a transversal direction.

The disclosure relates to a plate heat exchanger comprising: a package of heat exchanger plates, each having a peripheral portion and several port portions with through flow ports communicating with flow passages between adjacent heat exchanger plates. First guiding ribs are arranged in the port portions, which first guiding ribs in every other flow passage between the heat exchanger plates are configured to guide and distribute the first heat exchange medium from a first inlet channel to a heat exchange portion and from the heat exchange portion to a first outlet channel, and in that second guiding ribs are arranged in the port portions, which second guiding ribs in the remaining flow passages between the heat exchanger plates are configured to guide and distribute a second heat exchange medium from a second inlet channel to the heat exchange portion and from the heat exchange portion to a second outlet channel.

A brazed plate heat exchanger comprises alternating first and second heat exchanger plates each having two long side edges, two short side edges and a longitudinal axis parallel to the long side edges. Each first and second plate has a corrugation pattern forming a heat transfer area comprising mutually parallel ridges and grooves in which the ridges of one first plate abut the grooves of an adjoining second plate. Each ridge and groove of at least one first heat transfer area of each first late is inclined between 0° and 30° relative to the longitudinal axis. Each ridge and groove of at least one heat transfer area of each second plate is inclined between 90° and 45° relative to the longitudinal axis. Part of the ridges and grooves of each first plate extend without discontinuities between opposite edges of the heat transfer area parallel to the short side edges

A method for assembling a plate package of a plate and fin heat exchanger comprising plural flat plates and fin plates, wherein each flat plate comprises a peripheral flank portion on opposing longitudinal sides. Each flank portion is permanently joined to an adjacent flat plate such that a longitudinally extending flow channel exists between adjacent flat plates, and wherein each flat plate comprises a heat exchange portion having a transversal extension between the peripheral flank portions. The fin plates comprise longitudinally extending fins in the heat exchange portion, which fins form in a transversal direction parallel guide channels for first and second heat exchange mediums, respectively. The fin plates and flat plates are permanently attached to each other. The method comprises providing a larger fin plate than the heat exchange portion in the transversal direction and placing it onto the flat plate of the package before permanently joining the plates.

A plate heat exchanger comprises permanently joined plates including a first and a second heat transfer plate. A heat transfer pattern comprises ridges and groove portions. The ridges extend along ridge lines and the groove portions extend along groove lines. In a heat transfer area, the first heat transfer plate is permanently joined to the second heat transfer plate in a number of joints along the ridge lines of the first heat transfer plate and the groove lines of the second heat transfer plate. For each joint of the number of joints a quotient between a circumference, O, of the joint and an area, A, of the joint is O/A≥2.6 mm −1 .

A plate heat exchanger comprises heat exchanger plates each comprising a heat exchanger area extending in parallel with an extension plane and comprising a corrugation extending from a primary level on one side of the extension plane to a secondary level on an opposite side of the extension plane. Four porthole areas enclose a respective porthole and comprise two first porthole areas comprising a respective annular base area around the porthole at the secondary level. Each first porthole area comprises a first annular ridge around the porthole and projecting from the annular base area to the primary level, and a second annular ridge around and at a distance from the first annular ridge and projecting from the annular base area to the primary level. The first and second annular ridges are through-broken by a number of depressions.