In-vehicle device including cooling apparatus

An in-vehicle device to be mounted on a vehicle, the in-vehicle device comprising:

• a cooler, comprising:
• a heat-receiving block with a first main surface to which a heating element is attachable;
• a plurality of heat-dissipating members fixed to a second main surface of the heat-receiving block opposite to the first main surface with spaces therebetween, the plurality of heat-dissipating members being configured to dissipate heat transferred from the heating element through the heat-receiving block to air flowing through the spaces;
• and
• a channel definer covering the plurality of heat-dissipating members and fixed to the second main surface of the heat-receiving block, the channel definer defining a flow channel for the air flowing through the spaces between the plurality of heat-dissipating members, wherein
• the channel definer includes a plurality of vents for the air to flow into the flow channel and for the air drawn in the flow channel to flow out,
• the channel definer includes
• a pair of side wall members each being a plate and being fixed to the heat-receiving block in a direction in which main surfaces of the pair of side wall members face each other with the plurality of heat-dissipating members in between, and
• a lid member being a plate and being fixed to the pair of side wall members in a direction in which the lid member faces the second main surface of the heat-receiving block with the plurality of heat-dissipating members in between,
• the channel definer includes the plurality of vents including a vent being a space surrounded by first ends of the pair of side wall members, the lid member, and the heat-receiving block, and a vent being a space surrounded by second ends of the pair of side wall members, the lid member, and the heat-receiving block, and
• the flow channel defined by the channel definer extends along the pair of side wall members facing each other,
• wherein the in-vehicle device further comprises:
• an electronic component being the heating element attached to the first main surface of the heat-receiving block included in the cooler and outside the flow channel;
• and
• a housing to accommodate the electronic component and an overall portion of the cooler, wherein
• the flow channel defined by the channel definer connects to outside the housing.