Heat exchanger arrangement, especially for a fuel-operated vehicle heater

A vehicle heater, comprising a heat exchanger arrangement, the heat exchanger arrangement comprising:

• an outer housing having an outer bottom wall and an outer circumferential wall extending along a longitudinal axis for providing a pot shaped structure of the outer housing;
• an inner housing having an inner bottom wall and an inner circumferential wall extending along the longitudinal axis for providing a pot shaped structure of the inner housing, wherein a flow space is formed, for a fluid for which a temperature is to be regulated, between the inner housing and the outer housing;
• and
• at least one liquid uptake area for taking up liquid condensed in the inner housing, the at least one liquid uptake area being formed at the inner housing, the at least one liquid uptake area being in fluid connection with an inner space enclosed by the inner housing via an opening in the inner housing, the opening having a smaller extension in the circumferential direction and in the direction of the longitudinal axis than an extension of the at least one liquid uptake area in the circumferential direction and in the direction of the longitudinal axis, wherein one of at least one liquid guide channel is provided between a waste gas discharge opening, one of the at least one liquid uptake area and a step shoulder, the one of the at least one liquid guide channel is provided for guiding condensed liquid towards the one of the at least one liquid uptake area.

A heat exchanger arrangement comprising:

• an outer housing having an outer bottom wall and an outer circumferential wall extending along a longitudinal axis;
• an inner housing having an inner bottom wall and an inner circumferential wall extending along the longitudinal axis, wherein a flow space is formed, for a fluid for which a temperature is to be regulated, between the inner housing and the outer housing, the inner housing having an inner circumferential wall defining a space to be exposed to combustion gas;
• and
• a liquid uptake volume for taking up liquid condensed in the inner housing, the liquid uptake volume being in fluid communication, through an opening in the inner housing, with the space to be exposed to combustion gas, the liquid uptake volume being defined by at least one of the inner housing and the outer housing, the opening having a smaller extension in the circumferential direction and in the direction of the longitudinal axis than an extension of the liquid uptake volume in the circumferential direction and in the direction of the longitudinal axis, wherein a liquid guide channel is provided between a waste gas discharge opening, the liquid uptake volume and a step shoulder, wherein the liquid guide channel is provided for guiding condensed liquid towards the liquid uptake volume.