Flow-path structure
A flow-path structure through which fluid flows includes: a barrel body through which fluid flows in an inner circumference; and a frame body configured to connect a flow path member, the flow path member being configured to guide the fluid into the barrel body, wherein the frame body has: a ring-shaped frame part configured to be fitted into an outer surface of the barrel body; and an inner engagement portion configured to engage with an inner surface of the barrel body so as to hold a state in which the outer surface of the barrel body is brought into contact with the frame part.
1. A flow-path structure through which fluid flows, the flow-path structure comprising:
a barrel body through which fluid flows in an inner circumference; and
a frame body configured to connect a flow path member, the flow path member being configured to guide the fluid into the barrel body, wherein
the frame body has:
a ring-shaped frame part configured to be fitted into an outer surface of the barrel body; and
an inner engagement portion configured to engage with an inner surface of the barrel body so as to hold a state in which the outer surface of the barrel body is brought into contact with the frame part,
the barrel body comprises a first case and a second case configured to be assembled to a barrel-shape by being overlapped to each other,
the frame body is configured to hold an overlapped part between the frame part and the inner engagement portion, the overlapped part being a part where the first case and the second case are overlapped to each other,
the first case is formed into a U-shape and includes a first bottom plate portion and first side plate portions, the first side plate portions being respectively bent from both ends of the first bottom plate portion,
the second case is formed into a U-shape and includes a second bottom plate portion and second side plate portions, the second side plate portions being respectively bent from both ends of the second bottom plate portion,
the barrel body is formed into the barrel-shape by the first side plate portions and the second side plate portions being respectively overlapped,
the first side plate portions having ribs that allow positioning of tubes with respect to the barrel body,
the ribs are formed by bending a portion that is cut out from central portions of the first side plate portions,
the first case has opening portions that open after the ribs have been bent, and
the second case overlaps with the first case and closes the opening portions.
2. The flow-path structure according to claim 1 , wherein
the tubes comprise a plurality of tubes which are stacked,
the barrel body is provided with at least one tube of the plurality of tubes through which fluid flows, and heat exchange is performed between the fluid flowing through an inside of the at least one tube and the fluid flowing through an outside of the at least one tube,
the barrel body comprises the first case and the second case configured to hold the plurality of tubes in a stacked direction, and
the first side plate portions and the second side plate portions extend in the stacked direction.
3. The flow-path structure according to claim 2 , wherein
intake air to be sucked into an engine flows through the outside of the at least one tube via the barrel body and coolant liquid cooling the intake air flows through the inside of the at least one tube.