With vacuum insulation, at the same vacuum level, is the insulation effect the same whether pumping continuously or intermittently?
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With vacuum insulation, at the same vacuum level, is the insulation effect the same whether pumping continuously or intermittently?
What about the time for intermittent pumping and continuous pumping?
There’s a problem with this logic; it’s a false proposition. How to achieve “the same vacuum level”? If it has already been achieved at “the same vacuum level”. What’s the point of drawing continuously?
Intermittent pumping means pumping when the pressure exceeds a certain level or several times a day; continuous pumping means the pump runs non-stop
How many times per day should intermittent pumping be done? As long as the sealing is proper, the pressure won’t rise; with continuous pumping, the pump keeps running non-stop
To determine the quality of vacuum extraction, it’s not the numerical value that matters, but rather the speed at which this value increases over time. Since an absolute vacuum cannot be achieved, the rate of gas leakage also needs to be taken into consideration
The same vacuum level has been achieved; it now depends on whether that vacuum level can be maintained
It still mainly depends on the difference between the two, but generally speaking, the difference is not significant; it’s primarily the difference in heat transfer coefficients that matters