Cooling device for power source for ship propulsion device

A cooling device for a power source for a ship propulsion device comprising:

• a cooling water route that supplies water pumped up from underwater to a cooling water passage to cool a power source and discharges cooling water after the cooling from the cooling water passage to outside foreign matters with sizes that cause clogging of the cooling water route having been removed from the cooling water flowing through the cooling water route;
• a cartridge-type filtration device that is provided at a midpoint of a first water passage in the cooling water route and incorporates a filter for filtrating foreign matters remaining in the cooling water;
• and
• a second water passage that is branched from the first water passage and adapted such that a valve member is opened to cause the cooling water to flow in a case in which clogging occurs in the filter,
• wherein the valve member is disposed upward beyond the filtration device, and the first water passage and the second water passage are caused to communicate with each other with a relay water passage above the valve member and above the filter, and
• wherein the relay water passage is connected to the second water passage at a position which is lower than the branch point of the first water passage and the second water passage.

A cooling device for a power source for a ship propulsion device comprising:

• a cooling water route that supplies water pumped up from underwater to a cooling water passage to cool a power source and discharges cooling water after the cooling from the cooling water passage to outside, foreign matters with sizes that cause clogging of the cooling water route having been removed from the cooling water flowing through the cooling water route;
• a cartridge-type filtration device that is provided at a midpoint of a first water passage in the cooling water route and incorporates a filter for filtrating foreign matters remaining in the cooling water;
• and
• a second water passage that is branched from the first water passage and adapted such that a valve member is opened to cause the cooling water to flow in a case in which clogging occurs in the filter,
• wherein the ship propulsion device is an outboard motor including the power source that is an internal combustion engine,
• wherein the internal combustion engine includes a cylinder, the cylinder is disposed at the center of the outboard motor in the left-right direction,
• wherein the internal combustion engine includes a catalyst that is provided in an exhaust conduit line thereof,
• wherein the catalyst is provided, in the left-right direction, on the side of the cylinder,
• wherein the filtration device is disposed behind the catalyst and is disposed, in the left-right direction, on the side of a cylinder head of the internal combustion engine, and
• wherein the second water passage is disposed behind the filtration device.

A cooling device for a power source for a ship propulsion device comprising:

• a cooling water route that supplies water pumped up from underwater to a cooling water passage to cool a power source and discharges cooling water after the cooling from the cooling water passage to outside, foreign matters with sizes that cause clogging of the cooling water route having been removed from the cooling water flowing through the cooling water route;
• a cartridge-type filtration device that is provided at a midpoint of a first water passage in the cooling water route and incorporates a filter for filtrating foreign matters remaining in the cooling water;
• and
• a second water passage that is branched from the first water passage and adapted such that a valve member is opened to cause the cooling water to flow in a case in which clogging occurs in the filter,
• wherein the ship propulsion device is an outboard motor including the power source that is an internal combustion engine,
• wherein the internal combustion engine includes a cylinder, the cylinder is disposed at the center of the outboard motor in the left-right direction,
• wherein the internal combustion engine includes an intake conduit line, the intake conduit line extends, in the front-back direction of the outboard motor, along the inner surface of an engine case of the outboard motor and is bent at rear side of a cylinder block of the internal combustion engine, and is connected to an intake port, and
• wherein the filtration device is disposed between the intake conduit line and the cylinder block.

A cooling device for a power source for a ship propulsion device comprising:

• a cooling water route that supplies water pumped up from underwater to a cooling water passage to cool a power source and discharges cooling water after the cooling from the cooling water passage to outside foreign matters with sizes that cause clogging of the cooling water route having been removed from the cooling water flowing through the cooling water route;
• a cartridge-type filtration device that is provided at a midpoint of a first water passage in the cooling water route and incorporates a filter for filtrating foreign matters remaining in the cooling water;
• and
• a second water passage that is branched from the first water passage and adapted such that a valve member is opened to cause the cooling water to flow in a case in which clogging occurs in the filter,
• wherein the filtration device includes a swirling flow generation member that causes a flow of the cooling water swirling along a surface of the filter to be generated,
• wherein the swirling flow generation member includes a blade portion that is formed in a twisted-shaped surface, a peripheral position of the twisted-shaped surface varies, in the up-down direction and the radial direction of the filtration device, along the circumferential direction thereof, and
• wherein the filter includes a capturing unit, and an inner cross-sectional area defined by a side wall thereof gradually decreases from the upper side toward the lower side in the up-down direction.