| 摘要 |
A method for expansion control in a closed fluid circulation system wit h varying temperature, in which system air is withdrawn from the circulating fluid through the formation of an air head wherein air to be withdrawn is collecte d and from which air can be blown off, controlled by a valve, to the environme nt or a receiving space, whilst, further, measures are taken for taking up, whe n the temperature varies, an attendant expansion and shrinking of the fluid within the closed system, and measures for enabling adding fluid to the system, which fluid is withdrawn from an external stock of fluid under pressure, and the air hea d volume is measured and when a predetermined value is exceeded, a fluid valve is opened through which fluid is introduced into the air head until the volu me of the air head is substantially equal to the predetermined value and the fluid valve is closed.
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