Heat pump system

A heat pump system, comprising:

• a compressor configured to compress a refrigerant;
• a first heat exchanger configured to exchange heat between the refrigerant and air;
• a second heat exchanger configured to exchange heat between the refrigerant heat exchanged by the first heat exchanger and water;
• a first water pipe configured to guide water to heat exchange in the second heat exchanger;
• a second water pipe configured to guide the water heat exchanged in the second heat exchanger to the outside;
• a first refrigerant pipe configured to discharge the refrigerant heat exchanged in the first heat exchanger during a defrosting operation for the first heat exchanger;
• a second refrigerant pipe connected to the first refrigerant pipe and configured to guide the refrigerant in the first refrigerant pipe to the second heat exchanger;
• a third refrigerant pipe configured to discharge the refrigerant heat exchanged in the second heat exchanger;
• a bypass pipe having a first end connected to the first refrigerant pipe and a second end connected to the third refrigerant pipe and configured to bypass the second heat exchanger;
• and
• a fourth refrigerant pipe connected to the second end of the bypass pipe to guide refrigerant introduced through the second end of the bypass pipe and including a third heat exchanger configured to exchange heat with the water flowing in the second water pipe,
• wherein the refrigerant flowing in the first refrigerant pipe is guided to the second refrigerant pipe or the bypass pipe.

A heat pump system, comprising:

• a compressor configured to compress a refrigerant;
• a first heat exchanger configured to heat exchange between the refrigerant and air, a second heat exchanger configured to heat exchange between the refrigerant and water;
• a first refrigerant pipe configured to discharge the refrigerant heat exchanged in the first heat exchanger during a defrosting operation for the first heat exchanger;
• a second refrigerant pipe configured to guide the refrigerant from the first refrigerant pipe to the second heat exchanger;
• a third refrigerant pipe configured to discharge the refrigerant heat exchanged in the second heat exchanger;
• an expansion valve configured to expand the refrigerant flowing in the second refrigerant pipe and to open and close the second refrigerant pipe;
• a first water pipe configured to supply water to be heat exchanged in the second heat exchanger;
• a second water pipe configured to return the water heat exchanged in the second heat exchanger;
• a third heat exchanger configured to exchange heat between the refrigerant with the water flowing in the second water pipe during the defrosting operation;
• and
• a bypass pipe including a first end connected to the first refrigerant pipe and a second end connected to the third refrigerant pipe and configured to bypass the second heat exchanger and guide the refrigerant heat exchanged by the first heat exchanger to the third heat exchanger side through the second end of the bypass pipe during the defrosting operation.