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    • 33. 发明专利
    • AUXILIARY COOLING EQUIPMENT
    • JPH0915379A
    • 1997-01-17
    • JP16331195
    • 1995-06-29
    • HITACHI LTD
    • MORIYA KENJIOKURA MINORUYAMANARI SHOZO
    • G21D1/00
    • PURPOSE: To provide a rust preventives concentration controlling method and concentration controlling device for an auxiliary cooling equipment capable of adding rust preventives into a system and controlling of concentration without a special rust preventives adding tank. CONSTITUTION: This equipment has circulation pumps 1a, 1b and heat exchangers 2a, 2b connected in parallel and the system water is circulated with the circulation pumps 1a and 1b to cool the heat generated in each cooling object component with heat exchangers 2a and 2b. In inlet piping part 12, a surge tank 4 and connection pipe 13 are provided for ensuring the forced pressure of the circulation pumps 1a, 1b and absorbing the volume expansion of the system water. To the surge tank 4, an injection pipe 41, an injection valve 51 and an inlet 8 for enabling adding rust preventives into the system are provided. Also to the surge tank 4, a surge tank system water circulation pipe 40 and a surge tank system water circulation valve 50 connecting from the outlet pipe of the heat exchangers to the surge tank 4 are provided so as to circulate part of system water.