Dishwasher

A dishwasher comprising:

• a tub having a washing space defined therein, wherein a washing target is received in the washing space;
• a base disposed under the tub;
• and
• a heat pump apparatus for heating washing water to be introduced into the tub,
• wherein the heat pump apparatus includes:
• a compressor for compressing refrigerant;
• a first heat-exchanger configured to receive the refrigerant having flowed through the compressor and to heat the washing water to be supplied to the tub in a washing mode of the dishwasher;
• a second heat-exchanger configured to condense water vapor contained in the air discharged from the tub in a drying mode of the dishwasher;
• a third heat-exchanger configured to heat the air having flowed through the second heat-exchanger in the drying mode;
• a heat-exchanger duct constructed to accommodate therein the second heat-exchanger and the third heat-exchanger, wherein the heat-exchanger duct has an inlet through which the air is introduced, and an outlet through which the air having flowed through the second heat-exchanger and the third heat-exchanger is discharged;
• a first duct having a first inlet communicating with the tub and a first outlet communicating with the heat-exchanger duct;
• a second duct having a second inlet communicating with the heat-exchanger duct and a second outlet communicating with the tub;
• a first damper configured to open or close the inlet of the heat-exchanger duct and the first outlet of the first duct;
• and
• a second damper configured to open or close the outlet of the heat-exchanger duct and the second inlet of the second duct.