Quiet Nuisance Alarms
Kitchens are particularly susceptible to "nuisance" alarms. The horn on a typical alarm won't stop sounding until there's no more smoke to detect, which in a kitchen could take a while. Nuisance alarms are one of the main reasons people disable smoke alarms, and that's not a good idea, especially in the kitchen where the majority of fires start. Now there are smoke alarms available that have a "hush" button on them. Pushing it will kill the noise long enough for you to air out the room.
Some sensors are more sensitive than others, even if they're the same model. Before you go buy an alarm with a hush button, try swapping out the one in the kitchen with one from another part of the house.