(57) A heat pump is provided. The heat pump that may include an outdoor heat exchanger,
in which a refrigerant may be condensed by being heat-exchanged with outdoor air in
a cooling operation, and evaporated by being heat-exchanged with the outdoor air in
a heating operation, and an outdoor fan that allows the outdoor air to be moved to
the outdoor heat exchanger. The outdoor heat exchanger may include a front-row heat
exchange device, through which the outdoor air moved by the outdoor fan may pass,
and a rear-row heat exchange device, through which the outdoor air having passed through
the front-row heat exchange device may pass; a water-repellent coating layer formed
on a surface of the front-row heat exchange device, which the outdoor air contacts;
and a hydrophilic coating layer formed on a surface of the rear-row heat exchange
device, which the outdoor air contacts. Accordingly, the outdoor heat exchanger may
have a longer frost formation time in comparison to a hydrophilic coated double-row
heat exchanger, and a high heat exchange performance and lower pressure loss in comparison
to a water-repellent coated heat exchanger.
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