Heat exchanger cooling system

A heat exchanger cooling system comprising:

• a heat exchanger configured to dissipate heat of refrigerant circulating through a vehicle engine, a battery of a vehicle or a vehicle fuel cell system;
• a storage tank configured to store liquid;
• a passage extending from the storage tank and branching off into a first passage and a second passage at a branch portion provided in a middle of extension of the passage, the passage including a liquid discharge portion provided on a distal end side of the first passage so as to face the heat exchanger;
• a pump configured to send the liquid into the passage from the storage tank;
• a first opening-closing valve connected to the first passage and configured to open and close the first passage;
• a second opening-closing valve connected to the second passage and configured to open and close the second passage;
• and
• a controlling portion configured to control an operation of the pump and control opening and closing of the first opening-closing valve and opening and closing of the second opening-closing valve, wherein, in response to stopping the pump, the controlling portion is configured to close the first opening-closing valve prior to the second opening-closing valve.

A heat exchanger cooling system comprising:

• a heat exchanger configured to dissipate heat of refrigerant circulating through a vehicle engine, a battery of a vehicle or a vehicle fuel cell system;
• a storage tank configured to store liquid;
• a passage extending from the storage tank and branching off into a first passage and a second passage at a branch portion provided in a middle of extension of the passage, the passage including a liquid discharge portion provided on a distal end side of the first passage so as to face the heat exchanger, wherein the liquid discharge portion is below the storage tank in a vertical direction;
• a pump configured to send the liquid into the passage from the storage tank;
• a first opening-closing valve connected to the first passage and configured to open and close the first passage;
• a second opening-closing valve connected to the second passage and configured to open and close the second passage, wherein each of the first opening-closing valve and the second opening-closing valve is a normally-closed type electromagnetic valve;
• and
• a controlling portion configured to control an operation of the pump and control opening and closing of the first opening-closing valve and opening and closing of the second opening-closing valve, wherein, in response to stopping the pump, the controlling portion is configured to close the first opening-closing valve prior to the second opening-closing valve.