Patent ID: 11892206
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A heat exchanger comprising:
a distributor; and
a first heat transfer tube and a second heat transfer tube connected in parallel with each other with respect to the distributor,
the first heat transfer tube being disposed above the second heat transfer tube,
the first heat transfer tube having a first inner circumferential surface, and at least one first groove recessed relative to the first inner circumferential surface and arranged side by side in a circumferential direction of the first heat transfer tube,
the second heat transfer tube having a second inner circumferential surface, and at least one second groove recessed relative to the second inner circumferential surface and arranged side by side in a circumferential direction of the second heat transfer tube,
an internal pressure loss of the first heat transfer tube being smaller than an internal pressure loss of the second heat transfer tube,
the heat exchanger further comprising a third heat transfer tube connected in series with the first heat transfer tube and the second heat transfer tube via the distributor wherein:
the internal pressure loss of the first heat transfer tube is smaller than the internal pressure loss of the second heat transfer tube, and is greater than an internal pressure loss of the third heat transfer tube, and
with regard to at least one of a number, a depth, and a lead angle of each of the at least one first groove and the at least one second groove, and a tube thickness of each of the first heat transfer tube and the second heat transfer tube,
at least one of the number, the depth, and the lead angle of the at least one first groove, and the tube thickness of the first heat transfer tube is smaller than at least one of the number, the depth, and the lead angle of the at least one second groove, and the tube thickness of the second heat transfer tube.