Heat exchanger

A heat exchanger, which includes a refrigerant flow path having a refrigerant inlet for introducing refrigerant into the heat exchanger and a refrigerant outlet for discharging refrigerant, and a coolant flow path through which coolant flows to exchange heat with the refrigerant flowing through the refrigerant flow path,

• wherein the coolant flow path includes a first coolant flow path through which first coolant flows, and a second coolant flow path through which second coolant flowing in another place relative to the first coolant flows, and
• wherein the heat exchanger is partitioned into a first heat exchange section, in which the first coolant of the first coolant flow path exchanges heat with the refrigerant and a second heat exchange section, in which the second coolant of the second coolant flow path exchanges heat with the refrigerant, and the heat exchange in the first heat exchange section and the heat exchange in the second heat exchange are carried out independently,
• wherein the refrigerant flowing through the refrigerant flow path first exchanges heat with the coolant, which is higher in temperature, of the first coolant and the second coolant,
• wherein the refrigerant first absorbs heat by a heat exchange with the first coolant and then, second absorbs heat by a heat exchange with the second coolant;
• wherein a bypass channel is disposed on at least one of the first coolant flow path and the second coolant flow path to bypass the coolant;
• and
• wherein, in a cooling mode that the refrigerant radiates heat, the refrigerant exchanges heat with the second coolant after exchanging heat with the first coolant, and
• wherein, in a heating mode that the refrigerant absorbs heat, the coolant of the second coolant flow path exchanges heat only with the first coolant after being bypassed.