US Patent 11397014 Auxiliary heat exchanger for HVAC system

A heating, ventilation, and/or air conditioning (HVAC) system, includes a housing having a wall with an exterior surface configured to be exposed to an ambient environment. The HVAC system further includes a first heat exchanger disposed within the housing and forming part of a refrigerant circuit of the HVAC system and a second heat exchanger disposed within the housing and forming part of the refrigerant circuit, in which the second heat exchanger includes a coil coupled to the wall, such that the coil and the wall are configured to transfer heat between the ambient environment and refrigerant passing through the second heat exchanger.