Patent ID: 11913729
Assignee: DAIKIN INDUSTRIES, LTD.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  B  H | IPC B  F

Claim 0:
1. A heat exchanger comprising:
refrigerant channels that:
extend in a first direction,
are disposed along a second direction intersecting with the first direction, and
are disposed along a third direction intersecting with the first direction and the second direction; and

heat transfer tubes defining the refrigerant channels, wherein
one or both of a size of an outer edge and a size of an inner edge of the heat transfer tubes are different between a first position and a second position in the first direction,
outer surfaces of the heat transfer tubes each comprise a protrusion that:
protrudes in a direction intersecting with the first direction, and
is in contact with an outer surface of one of the heat transfer tubes adjacent thereto in the second direction,

the protrusion comprises a concave portion extending along the third direction.