Combustion chamber assembly unit for a vaporizing burner

A vehicle heater comprising:

• a combustion chamber assembly unit comprising:
• a combustion chamber housing comprising a circumferential wall extending in a direction of a combustion chamber housing longitudinal axis and a bottom area, the bottom area and the circumferential wall together defining a combustion chamber, wherein the bottom area comprises an evaporating medium carrier and porous evaporating medium on a side of the evaporating medium carrier facing the combustion chamber;
• a first flame diaphragm with a first diaphragm opening, the first flame diaphragm being connected to the circumferential wall;
• a second flame diaphragm with a second diaphragm opening the second flame diaphragm being connected to the circumferential wall and being disposed at an axial distance to the first flame diaphragm and on an axial side of the first flame diaphragm facing away from the porous evaporating medium;
• and
• an air admission opening arrangement provided in the circumferential wall, the air admission opening arrangement comprising at least one air admission opening between the first flame diaphragm and the second flame diaphragm;
• a combustion air feed device feeding combustion air to the combustion chamber via the air admission opening arrangement;
• and
• a fuel feed device feeding fuel to the combustion chamber via the porous evaporating medium, wherein no air admission opening is provided in the circumferential wall in an axial area between the porous evaporating medium and the first flame diaphragm.

A combustion chamber assembly unit for a vaporizing burner, the combustion chamber assembly unit comprising:

• a combustion chamber housing comprising a circumferential wall extending in a direction of a combustion chamber housing longitudinal axis and a bottom area, the bottom area and the circumferential wall together defining a combustion chamber, wherein the bottom area comprises an evaporating medium carrier and porous evaporating medium on a side of the evaporating medium carrier facing the combustion chamber;
• a first flame diaphragm with a first diaphragm opening, the first flame diaphragm being connected to the circumferential wall;
• a second flame diaphragm with a second diaphragm opening the second flame diaphragm being connected to the circumferential wall and being disposed at an axial distance to the first flame diaphragm and on an axial side of the first flame diaphragm facing away from the porous evaporating medium, the circumferential wall comprising a circumferential wall portion extending between the first flame diaphragm and the second flame diaphragm and the circumferential wall comprising another circumferential wall portion extending between the porous evaporating medium and the first flame diaphragm, the another circumferential wall portion extending in an axial direction with respect to a longitudinal axis of the combustion chamber housing;
• and
• an air admission opening arrangement provided only in the circumferential wall portion extending between the first flame diaphragm and the second flame diaphragm, wherein no air admission opening is provided in the another circumferential wall portion extending between the porous evaporating medium and the first flame diaphragm.