| 摘要 |
An evaporator coil includes a conduit having an interior passageway that provides a pathway for a flow of refrigerant. An outer wall of the conduit forms a channel having a longitudinal opening. The channel extends lengthwise adjacent to the interior passageway. The channel contains an electrical heating element that is in thermal contact with the conduit. The electrical heating element periodically provides heat to defrost the evaporator coil during an evaporator defrost cycle. The electrical heating element may be coupled directly to the channel or be housed within a second conduit that is at least partially contained within the channel.
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