Intercooler

An intercooler that cools supercharged intake air supercharged to an engine by a supercharger, the intercooler comprising:

• a heat exchanger including
• a first heat exchange portion through which a first heat exchange medium flows, and
• a second heat exchange portion through which a second heat exchange medium flows, a temperature of the second heat exchange medium being lower than a temperature of the first heat exchange medium, wherein
• the first heat exchange medium flowing through the first heat exchange portion cools the supercharged intake air by exchanging heat with the supercharged intake air,
• the second heat exchange medium flowing through the second heat exchange portion cools the supercharged intake air by exchanging heat with the supercharged intake air,
• the heat exchanger includes an inner fin configured to enhance the heat exchange between the supercharged intake air and the first heat exchange medium,
• the heat exchanger includes a boiling suppression portion configured to suppress a boiling of the first heat exchange medium flowing in an upstream part, in a flow direction of the supercharged intake air, of the first heat exchange portion,
• the heat exchanger includes a first plate and a second plate,
• one of the first plate and the second plate includes a recess portion,
• the first plate and the second plate are joined with each other such that another of the first plate and the second plate closes the recess portion to define the first heat exchange portion between the recess portion and the other of the first plate and the second plate,
• the inner fin includes
• a plurality of peak portions joined to the one of the first plate and the second plate, and
• a plurality of valley portions joined to the other of the first plate and the second plate,
• the inner fin has a corrugated shape in which the plurality of peak portions and the plurality of valley portions are arranged alternately one by one,
• the inner fin includes middle portions each of which is positioned between one of the plurality of peak portions and adjacent one of the plurality of valley portions,
• a plurality of flow paths through which the first heat exchange medium flows are defined between pairs of adjacent middle portions,
• a fin pitch is a distance between two adjacent middle portions, and
• the boiling suppression portion includes the inner fin in which the fin pitch on an upstream side with respect to the flow direction of the supercharged intake air is larger than the fin pitch on a downstream side with respect to the flow direction of the supercharged intake air.

An intercooler that cools supercharged intake air supercharged to an engine by a supercharger, the intercooler comprising:

• a heat exchanger including
• a first heat exchange portion through which a first heat exchange medium flows, and
• a second heat exchange portion through which a second heat exchange medium flows, a temperature of the second heat exchange medium being lower than a temperature of the first heat exchange medium, wherein
• the first heat exchange portion is configured to cool the supercharged intake air by exchanging heat between the supercharged intake air and the first heat exchange medium,
• the second heat exchange portion is configured to cool the supercharged intake air by exchanging heat between the supercharged intake air and the second heat exchange medium,
• the heat exchanger includes an inner fin configured to enhance the heat exchange between the supercharged intake air and the first heat exchange medium,
• the heat exchanger includes a boiling suppression portion configured to suppress a boiling of the first heat exchange medium flowing in an upstream part, in a flow direction of the supercharged intake air, of the first heat exchange portion,
• the inner fin defines, in the first heat exchange portion, a plurality of flow paths through which the first heat exchange medium flows,
• a first flow path of the plurality of flow paths is located on an upstream side with respect to the flow direction of the supercharged intake air,
• a second flow path of the plurality of flow paths is located on a downstream side with respect to the flow direction of the supercharged intake air,
• the boiling suppression portion includes a resistant body configured to cause a flow speed of the first heat exchange medium in the second flow path to be lower than a flow speed of the first heat exchange medium in the first flow path,
• the inner fin defines, in the first heat exchange portion, a plurality of flow paths through which the first heat exchange medium flows,
• a first flow path of the plurality of flow paths is located on an upstream side with respect to the flow direction of the supercharged intake air,
• a second flow path of the plurality of flow paths is located on a downstream side with respect to the flow direction of the supercharged intake air, and
• the boiling suppression portion includes a resistant body configured to cause a flow speed of the first heat exchange medium in the second flow path to be lower than a flow speed of the first heat exchange medium in the first flow path.