Flow amount control device

A fluid flow control device comprising:

• a housing whose peripheral wall is cylindrical and penetrated by a plurality of fluid passages;
• a valve member contained in the housing and controlling a flow amount of fluid that passes through the fluid passages;
• and
• a filter that is attached, circumferentially with respect to an axis of the housing, around the peripheral wall of the housing, the filter including:
• a filtering element that covers a certain fluid passage of the fluid passages for inhibiting a foreign object from entering the certain fluid passage;
• a supporting portion that extends circumferentially with respect to the axis of the housing, for supporting a peripheral edge of the filtering element, with having certain breadth that is formed in parallel with the axis of the housing;
• and
• a connecting portion that extends circumferentially with respect to the axis of the housing for connecting between circumferential both ends of the supporting portion, with having given breadth that is formed in parallel with the axis of the housing, wherein the given breadth of the connecting portion is narrower than the certain breadth of the supporting portion,
• wherein a first sealing portion is formed in a portion, which surrounds an opening of the certain fluid passage, of an outer surface of the peripheral wall of the housing, and a second sealing portion is formed in a portion, which surrounds the filtering element, of an inner surface of the supporting portion of the filter,
• wherein the first sealing portion and the second sealing portion seal a gap between them with each other by contacting with each other,
• wherein the connecting portion of the filter can be divided into a first and a second division portions at a circumferentially intermediate point of the connecting portion,
• wherein the first division portion has a first convex portion and the second division portion has a first concave portion, and one of the first and second division portions has a second convex portion and the other of the first and second division portions has a second concave portion, and
• wherein the first convex portion and the first concave portion are hooked with each other, with being unable to be circumferentially detached, and the second convex portion and the second concave portion are hooked with each other, with being unable to be radially detachable.