Fluid control device

A fluid control apparatus comprising:

• a housing portion including an inlet port through which a fluid is introduced from an outside of the housing portion, an outlet port through which the fluid is discharged to the outside of the housing portion, and an internal space configured to fluidically-communicate with the inlet port and the outlet port;
• and
• a valve portion accommodated in the internal space of the housing portion and including one side fixedly coupled to an internal surface of the housing portion,
• wherein the valve portion includes:
• a lower plunger module;
• an upper plunger module provided above the lower plunger module;
• and
• a solenoid provided to surround a partial region of the upper plunger module and a partial region of the lower plunger module,
• wherein the lower plunger module includes a lower plunger member movable in a first direction relative to the housing portion, and
• wherein the upper plunger module includes:
• an upper plunger member movable in the first direction relative to the housing portion and including at least a partial region surrounded by the solenoid;
• and
• a core including at least a partial region surrounded by the solenoid,
• wherein the lower plunger member and the core include a magnetic material, and
• wherein a degree of magnetization of a material forming the upper plunger member is lower than a degree of magnetization of a material forming the lower plunger member and a degree of magnetization of a material forming the core.