Ion exchanger

An ion exchanger comprising:

• a case that has an opening that opens upward, the case including, in a lower portion, an intake port through which coolant is drawn in and a discharge port through which the coolant is discharged;
• an ion exchanging resin member that is arranged in the case and removes ions from the coolant, the ion exchanging resin member comprising a porous body that allows passage of coolant to remove the ions;
• a cap that is detachably attached to the case and closes the opening of the case;
• and
• a tube member having first and second ends, the tube member being arranged to extend in a vertical direction within the case, wherein
• the first end of the tube member includes a lower end aperture, the lower end aperture being connected to the discharge port,
• the second end of the tube member includes an upper end aperture,
• the second end of the tube member protrudes from an upper end surface of the ion exchanging resin member such that the upper end aperture faces an inner top surface in an upper end portion of the cap,
• the cap includes a tubular body portion, through which the coolant is configured to flow, that extends in the vertical direction and a lid portion that is arranged at an upper end of the tubular body portion,
• wherein at least a portion of the porous body of the ion exchanging resin member is accommodated inside the tubular body portion,
• the lid portion closes the upper end of the tubular body portion, and
• the tubular body portion holds the tube member such that the tube member extends through the porous body of the ion exchanging resin member in the vertical direction.