Heat pump

A heat pump comprising:

• a water inlet pipe assembly configured to receive water from an outside, the water inlet pipe assembly comprising:
• a first water inlet part configured to receive the water from the outside;
• a second water inlet part laterally bent from the first water inlet part;
• and
• a third water inlet part bent rearward from the second water inlet part and extending parallel to the first water inlet part;
• a pump connected to the water inlet pipe assembly;
• the pump being connected to the third water inlet part;
• a heat exchanger configured to exchange a heat of the water discharged from the pump with a refrigerant, the first water inlet part extending forward from a lateral side of the heat exchanger;
• and
• a water outlet pipe assembly configured to supply the heat-exchanged water to the outside.