Heat exchanger

A heat exchanger comprising:

• a heat exchanger block having a plurality of first fluid channels for a refrigerant and a plurality of second fluid channels for a liquid coolant, the first fluid channels and the second fluid channels being thermally connected to each other;
• and
• a fluid collector,
• wherein the first fluid channels have a first fluid channel section and a second fluid channel section,
• wherein a first fluid inlet for the refrigerant is fluidically connected to the first fluid channel section of the first fluid channels,
• wherein a first fluid outlet for the refrigerant is fluidically connected to the first fluid channel section of the first fluid channels,
• wherein a second fluid inlet for the refrigerant is fluidically connected to the second fluid channel section of the first fluid channels,
• wherein a second fluid outlet for the refrigerant is fluidically connected to the second fluid channel section of the first fluid channels,
• wherein the fluid collector has a third fluid inlet for the refrigerant and a third fluid outlet for the refrigerant, and
• wherein a fourth fluid inlet for the liquid coolant is fluidically connected to the second fluid channels,
• wherein a fourth fluid outlet for the liquid coolant is fluidically connected to the second fluid channels,
• wherein the first fluid outlet is fluidically connected to the third fluid inlet,
• wherein the third fluid outlet is fluidically connected to the second fluid inlet, and
• wherein the first fluid channel section of the first fluid channels has a first passage and a second passage, the first passage and the second passage being serially interconnected and thus allowing serial through-flow.