Evaporator in a refrigerant circuit B

An evaporator in a refrigerant circuit, comprising:

• an inlet chamber fluidly connected to an evaporator outlet chamber via evaporator tubes, and
• a separator integrated into the evaporator inlet chamber, the separator having an expansion member in which a refrigerant is expanded as a two-phase liquid/vapour mixture and then divided into a vapour phase and into a liquid phase which is separate therefrom,
• wherein the vapour phase and the liquid phase both exit the separator and collect in the same inlet chamber,
• wherein the vapour phase is conducted via a bypass line to the evaporator outlet chamber,
• wherein the liquid phase is conducted counter to the direction of gravity into the evaporator tubes,
• wherein at least one evaporator tube is a flat tube with a plurality of micro-channels, through which the refrigerant is guided,
• wherein, as a first flat tube, the evaporator flat tube is a constituent part of a first evaporator tube set which guides the refrigerant from the inlet chamber counter to the direction of gravity into a deflecting chamber,
• wherein the refrigerant is guided back from the deflecting chamber via at least one second flat tube which is a constituent part of a second evaporator tube set into a compressor chamber which is connected in flow terms to a suction side of a compressor, and
• wherein all the micro-channels of the first flat tube provide a flat tube flow cross section which is greater than the flat tube flow cross section which is provided by all the micro-channels of the second flat tube wherein a flow cross section which is provided by the micro-channels of the flat tube is reduced on account of the phase separation which takes place in the separator,
• wherein the inlet chamber is delimited by a chamber bottom, side walls which are raised from the chamber bottom in an evaporator height direction, and a chamber top wall,
• wherein the first evaporator flat tube protrudes through the chamber top wall into the inlet chamber in the evaporator height direction in such a way that orifice openings of the micro-channels are spaced apart from the chamber bottom by a spacing,
• wherein the liquid phase collects in the inlet chamber with a filling level,
• wherein the liquid phase micro-channel is dipped with at least one of a liquid phase micro-channel orifice opening into the liquid phase which is collected in the inlet chamber, and
• wherein the vapour phase micro-channel is positioned with a vapour phase micro-channel orifice opening above the liquid phase level by a height offset.