Patent attributes
A liquid circulation device includes a liquid discharge head, a circulation channel through which a liquid is circulated via the liquid discharge head, a first liquid feed pump to supply the liquid to the liquid discharge head in a circulation direction, a second liquid feed pump to collect the liquid from the liquid discharge head in the circulation direction, a filter disposed in the circulation channel upstream from the first liquid feed pump and downstream from the second liquid feed pump in the circulation direction, and a decompression-side reverse channel to bypass the second liquid feed pump. One end of the decompression-side reverse channel is connected to the circulation channel upstream from the second liquid feed pump, and another end of the decompression-side reverse channel is connected to the circulation channel downstream from the filter in the circulation direction.
