Microfluidic delivery cartridge for use with a microfluidic delivery device

A cartridge configured to be releasably connectable with a housing, the cartridge comprising:

• a reservoir for containing a fluid composition, the reservoir comprising a top surface, a bottom surface opposing the top surface, and a sidewall that joins the top and bottom surfaces, the reservoir defining a vertical axis extending from the bottom surface to the top surface;
• a microfluidic die in fluid communication with the reservoir, wherein the microfluidic die comprises a substrate, a plurality of intermediate layers, and a nozzle plate, wherein the plurality of intermediate layers include dielectric layers and a chamber layer that are positioned between the substrate and the nozzle plate, wherein the nozzle plate comprises a plurality of nozzles, and wherein the microfluidic die is disposed to dispense substantially all of a fluid composition in a horizontal direction parallel to a horizontal plane orthogonal to the vertical axis or in a downward direction at an angle of less than 0° relative to the horizontal plane;
• and
• an air flow channel defined between at least a portion of the bottom surface of the reservoir and a bottom wall connected to the reservoir,
• the air flow channel comprising an air inlet and an air outlet,
• wherein the air flow channel is configured to allow an air flow to pass from the air inlet in a horizontal direction direction parallel to the horizontal plane beneath the reservoir toward the air outlet,
• wherein at least a portion of the bottom wall of the air flow channel is angled upwardly at an angle of greater than 0° relative to the horizontal plane to redirect the air flow in an upward direction at an angle of greater than 0° relative to the horizontal plane before the air flow passes through the air outlet, and
• wherein the microfluidic die is positioned to release the fluid composition into the air flow channel to be entrained in the air flow.