An apparatus for producing a strong current of air, as for sounding a pipe organ or increasing the draft to a fire, consisting of a flexible, valved air chamber that is contracted and expanded by pumping to force the air through a nozzle.

• 风箱能产生强气流的一种装置，如用于探检管状器官或给火增加风量，由一个活动的带有阀门的空气室组成，可通过一喷嘴向空气室打气使之压缩或膨胀