bellows
鞴 centers on a device that blows air: a bellows, used to fan flames or supply a forced draft.
鞴 combines 革 (leather) with a right side that likely contributes sound and relates to blowing or a container. The exact historical development of the right component is uncertain.
The leather radical 革 suggests something made of leather, and the right side looks like a container with a blowing mechanism. Picture a leather bag that you squeeze to blow air: a bellows.
For ヒ, imagine the bellows making a soft 'hee' sound as air rushes out: hee -> ヒ.