Embodiments relate to an atomizer unit that has a chamber assembly with an injection chamber and an atomizer chamber. The injection chamber is connected to the atomizer chamber by a nozzle, and the atomizer unit has a first feed channel for feeding a first compressed air flow into the injection chamber, a second feed channel for feeding a second compressed air flow into the atomizer chamber, and an injection valve for injecting a coolant and/or lubricant into the first compressed air flow in the injection region of the injection chamber. The first compressed air flow flows from the injection chamber into the atomizer chamber through the nozzle, is atomized in the atomizer chamber by the nozzle, is combined with the second compressed air flow in the atomizer chamber in order to form a transport flow for transporting the injected coolant and/or lubricant, and can be conducted to the machining location.