Filter device

A filter device as a filtration device for filtering a freezable liquid, the filter device comprising:

• a filter case that includes an inflow portion and an outflow portion for the liquid;
• a filter element having a cylindrical shape provided inside the filter case with a center axis extending in a vertical direction, the filter element including a filtration member, an inner tube, a first plate, and a second plate, the filtration member having a cylindrical shape that filters the liquid, the inner tube having a cylindrical shape provided inside the filtration member, the first plate covering a lower end of the filtration member, the second plate covering an upper end of the filtration member;
• and
• a heater provided on a bottom surface of the filter case, wherein
• the inner tube includes a partition plate that partitions a hollow portion formed inside the inner tube,
• an inner tube side surface, as a side surface of the inner tube, has a first region and a second region, the first region is located vertically upward of the partition plate, and the second region is located vertically downward of the first region,
• in the first region, a plurality of holes penetrating the inner tube side surface are formed,
• the first plate has a first hole, the first hole communicating with the hollow portion of the inner tube, and
• the heater includes a rod-shaped heating unit, and the heating unit is inserted into a space surrounded by the second region in the inner tube side surface and the partition plate via the first hole.