Patent ID: 11970048
Assignee: THERMO KING LLC
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A transport climate control system for providing climate control to a climate controlled space of a transport unit, the transport climate control system comprising:
a transport climate control circuit comprising:
a compressor that compresses a working fluid passing through the transport climate control circuit,
an evaporator that absorbs heat from the climate controlled space and evaporates the working fluid, said evaporator comprising:
an evaporator coil having an inlet side for receiving the working fluid from an inlet of the evaporator coil, the inlet side extending from a first side of the evaporator coil to a second side of the evaporator coil, and an outlet side for returning the working fluid to an outlet of the evaporator coil, the outlet side extending from the first side of the evaporator coil to the second side of the evaporator coil,
at least two fans that control air flow around the first side of the evaporator coil and the second side of the evaporator coil,
an electric heating device positioned on the outlet side of the evaporator coil and only extends between the first side and the second side on the outlet side of the evaporator coil, and
a damper that moves between at least an open position and a closed position to separate the evaporator from the climate controlled space and to control an amount of the air flow between the evaporator and the climate controlled space,

a controller configured to control the transport climate control circuit and configured to defrost the evaporator coil by:
closing the damper when a defrost event is triggered to separate the evaporator from the climate controlled space,
instructing the transport climate control circuit to supply heat to or around the outlet side of the evaporator coil by turning on the electric heating device to generate heat, and
independently controlling each of the at least two fans to move the air around the evaporator coil in a controlled direction so that heat from the electric heating device at the outlet side of the evaporator coil at one of the first side or the second side of the evaporator coil is used to convectively heat frost formed on the inlet side of the evaporator coil.