Deioniser for a fluid circuit, fluid circuit comprising such a deioniser, method for filling a deioniser

A deioniser for a fluid circuit, the deionizer comprising:

• a fluid connection base suitable for being connected to a fluid circuit, this base comprising a fluid inlet port, a fluid outlet port and an attachment interface, and
• a cartridge comprising a body and a cover, the body being generally tubular along a longitudinal axis (X), and comprising a first closed longitudinal end and a second longitudinal end which is configured to be attached to the attachment interface of the base, the body comprising an internal storage cavity suitable for storing an ion exchange resin (A), the cover being configured to be attached to the second longitudinal end of the body and comprising a platform connected to a central well,
• the platform extending transversely with respect to the longitudinal axis (X) and closing the second end of the body and the internal cavity, this platform comprising first orifices covered by a first sieve or comprising this first sieve, the first orifices being configured to allow a fluid (F) to pass from the internal cavity towards the outlet port, and the first sieve being configured to retain the resin and prevent it from leaving the internal cavity, and
• the central well extending inside the body and having a generally tubular shape along the longitudinal axis (X), the central well comprising a first closed longitudinal end located on a side of the first longitudinal end of the body, and a second longitudinal end which is connected to the platform and which is fluidly connected to the inlet port, the central well comprising two sections adjacent between its first and second longitudinal ends, an upper section located on a side of the first end and comprising second orifices covered by a second sieve or comprising this second sieve, the second orifices being configured to allow the fluid (F) to pass from the central well into the internal cavity, and the second sieve being configured to retain the resin (A) and prevent it from leaving the internal cavity, and a lower section which is located on a side of the second end and which is devoid of orifices.