当选定真空泵抽空一个容器的时候,首要考虑的一个问题是抽气时间。解决这个问题传统的方法是用盖德公式,该式给出了容积为V的真空室内的抽气压力变化速率: (注意Pa是真空泵所能产生的最低压强,在这个压强下,抽气速率为零。Pa通常由真空泵的生产厂所提供的抽气速率一压强曲线获 One of the top issues to consider when choosing a vacuum pump to evacuate a container is the evacuation time. The traditional method of solving this problem is the Gade equation, which gives the rate of change of the suction pressure in a vacuum chamber of volume V: (Note that Pa is the lowest pressure that the vacuum pump can produce and at this pressure the rate of aspiration Is zero. Pa is usually obtained by the vacuum pump manufacturer provides a rate of pressure-pressure curve