自動排水器是怎樣工作的？

當(dāng)排水器貯水杯內(nèi)水位未達(dá)到一定高度時，壓縮空氣的壓力將浮球壓下關(guān)閉排水孔，就不會造成氣流泄漏；隨著貯水杯內(nèi)水位升高（此時冷凍式干燥機(jī)內(nèi)并不積水），浮球上升到一定高度便打開排水孔，杯內(nèi)凝結(jié)水在氣壓作用下很快排出機(jī)外。

When the water level in the water cup of the drainer does not reach a certain height, the pressure of compressed air will depress the floating ball and close the drain hole, which will not cause air leakage; as the water level in the water storage cup increases (at this time, there is no water in the freezing dryer), the floating ball rises to a certain height and the drain hole will be opened, and the condensed water in the cup will be discharged out of the machine quickly under the action of air pressure.

凝結(jié)水排盡后浮球又在氣壓作用下關(guān)閉排水孔。所以自動排水器是一種器。它不僅在冷凍式干燥機(jī)中得到應(yīng)用，而且在貯氣罐、后部冷卻器及過濾器等多種氣源處理設(shè)備上都得到廣泛應(yīng)用。

After the condensate is drained, the floating ball will close the drain hole under the action of air pressure. So the automatic drainer is an energy-saving device. It is not only used in freeze dryer, but also widely used in many kinds of air source processing equipment such as air storage tank, rear cooler and filter.

除了常用的浮球式自動排水器外，還經(jīng)常使用電子自動定時排水器，這種排水器的排水時間及兩次排水的時間間隔都可調(diào)整，而且能耐較高壓力，應(yīng)用也很普遍。

In addition to the commonly used floating ball automatic drainer, electronic automatic timing drainer is often used. The drainage time and the time interval between two times of drainage can be adjusted, and it can withstand high pressure, so it is widely used.

自動排水器的數(shù)量與位置如何確定？

How to determine the number and location of automatic drainers?

自動排水器的一次排水量是有一定限度的。如果在同一時間里冷凍式干燥機(jī)凝結(jié)水的生成量大于自動排水器的排水量，那么機(jī)內(nèi)就會有凝結(jié)水積存。時間一長，凝結(jié)水會越聚越多，因此在大、中型冷凍式干燥機(jī)中，往往要裝兩只以上的自動排水器，以保證機(jī)內(nèi)不積存凝結(jié)水。自動排水器應(yīng)安裝在預(yù)冷器和蒸發(fā)器的下游，常見的是直接裝在氣水分離器下方。

There is a certain limit to the primary displacement of the automatic drainer. If at the same time, the amount of condensate generated by the freezing dryer is greater than that of the automatic drainer, then there will be condensate accumulation in the machine. As time goes on, condensate will accumulate more and more. Therefore, in large and medium-sized freeze dryer, more than two automatic drainers are often installed to ensure that there is no condensate accumulation in the machine. The automatic drainer should be installed downstream of the precooler and evaporator, usually directly under the gas-water separator.

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