Patent ID: 11933547
Assignee: DANFOSS A/S
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A plate heat exchanger comprising a stack of plate elements each plate element being of a double wall construction comprising a first heat transfer plate and a second heat transfer plate each comprising a central heat exchanging portion provided with surface patterns adapted for contacting a first neighbouring plate element thereby forming a first flow path for a first fluid at the one side and adapted for contacting a second neighbouring plate element thereby forming a second flow path for a second fluid at the second side of the plate element, where the plate elements are formed with openings in opening areas, wherein the first heat transfer plate in an opening area is formed with a closed projection projecting transversely from the plane of the plate element in a first direction, and in the same opening area the second heat transfer plate is formed with an open projection projecting transversely from the plane of the plate element in a second direction being opposite to the first direction, such that the closed and open projections together defines a first leak cavity.