Patents Assigned to Vahterus Oy
  • Publication number: 20140305620
    Abstract: A Plate and Shell type plate heat exchanger, which comprises an inner shell (9) completely surrounding a plate pack (2) and inner end plates (11a, 11b) in the direction of the ends of the plate pack. The inner shell (9) is by its inner surface arranged into contact with the outer edge of the baffle plates (8a, 8b) arranged on the surface of the plate pack and by its outer surface the inner shell (9) is arranged to support itself against the inner surface of the shell (3) of the outer casing of the heat exchanger. The inner end plates (11a, 11b) are supported by their outer surface against the inner surface of the end plates (4a, 4b) of the outer casing.
    Type: Application
    Filed: November 16, 2012
    Publication date: October 16, 2014
    Applicant: Vahterus OY
    Inventor: Tapio Heiniƶ
  • Patent number: 7347253
    Abstract: The invention comprises a heat exchanger with plate structure and a flow guide plate (32). The flow guide plate (32) comprises at least one recess (42) for turning the stream of a heat transfer medium substantially from the direction of the thickness of the plate to be parallel with the plane of the plate.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: March 25, 2008
    Assignee: Vahterus Oy
    Inventors: Kari Tauren, Juha Suominen, Mauri Kontu
  • Patent number: 7204300
    Abstract: The invention relates to a heat exchanger (1) with plate structure, comprising a stack (6) of plates fitted inside a housing unit (2) assembled by welding circular heat transfer plates (10) and used as a pressure vessel. All the passages (7, 8, 26, 27) of the heat exchanger (1) are arranged to extend through an end plate (4). A flow guide (24) with the shape of the letter Z, or the like, is placed between the end plate (14) of the housing unit (2) and the end plate (14) of the stack (6) of plates.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: April 17, 2007
    Assignee: Vahterus Oy
    Inventors: Mauri Kontu, Juha Suominen
  • Patent number: 7013963
    Abstract: The invention relates to a method and a device for improving heat transfer in a circular plate heat exchanger (1), as well as a heat transfer plate to be used therein. The invention is based on changing the flow conditions in the radial direction in such a way that the heat transfer remains even. The ridges between the grooves of the heat transfer plates (10) may be, in their shape, evolvent graphs or the like.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: March 21, 2006
    Assignee: Vahterus Oy
    Inventors: Jouko Laine, Mauri Kontu
  • Patent number: 6918433
    Abstract: The invention relates to a heat exchanger (1) with plate structure, comprising a stack (6) of plates composed of circular heat transfer plates (10) by welding and fitted inside a housing unit (2) used as a pressure vessel, whose periphery is provided with flow guides (21, 22), by means of which the second heat transfer medium is guided to desired ducts in the stack (6) of plates. By means of spacing plates (32) fixed inside the flow guides (21, 22), it is possible to arranged several draughts for the stream of the heat transfer medium.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: July 19, 2005
    Assignee: Vahterus Oy
    Inventor: Mauri Kontu
  • Patent number: 6158238
    Abstract: An apparatus for transferring heating and cooling power by means of two heat transfer media, wherein at least one of the heating media is arranged to be evaporated or condensed. To reduce the need for space, the apparatus includes a shell (3) inside which at least one plate heat exchanger (1,2) is arranged loosely, flow slots (19) of the heat exchanger being arranged to be completely or mainly open towards the shell (3) in such a manner that the evaporating or condensing heat transfer medium can flow to the plate heat exchanger or from the plate heat exchanger from different sides of the plate heat exchanger on the whole length of that slot (19) which is open.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: December 12, 2000
    Assignees: ABB Power Oy, Vahterus Oy
    Inventors: Markku Lampinen, Mauri Kontu
  • Patent number: 5801353
    Abstract: A method and apparatus for welding thin sheets (34) and (35) at the periphery of aligned holes therein by melting the sheets together by a rotating electrode (23) in a protective gas atmosphere. The sheets (34) and (35) are pressed together by copper rings (32) and (33) which also function as heat transfer members to conduct the heat away from the welding seam and thus prevent distortion thereat. The electrode (23) is adjusted to the proper vertical position by a guide (9) in a jig (7), and it is locked to the position determined by the sheets (34) and (35) by a clamp (31).
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: September 1, 1998
    Assignee: Vahterus Oy
    Inventor: Timo Mauno Pirila