Patent ID: 8881547
Filing Date: 2014-11-11
Classification: F25B,F25D,F28D

Abstract:
1. A heat exchanger comprising: a housing having an overall tubular configuration, the housing having an exterior sheet metal wall and one end that is open and an opposite end that is open, a conduit having an uncoiled length exceeding the length of the housing, a first heat-transfer fluid being conducted through the conduit, the housing being operable to receive the conduit therewithin, the housing being operable to guide therethrough a second heat transfer fluid such that a heat exchange operation takes place between the second heat transfer fluid guided through the housing and the conduit having therein the first heat transfer fluid while the first heat transfer fluid advances along the conduit in a direction from the one end of the housing toward the opposite end of the housing, and the housing having surface area portions forming passages through which the second heat transfer fluid can enter the housing, the surface area portions of the housing being located in a region more proximate to the one end of the housing than the opposite end of the housing, wherein all passages in the sheet metal wall adapted to allow the second heat transfer fluid to enter the housing, except for the opposite end that is open, are closer to the one end than the opposite end.