Wood in the hightemperature coefficient of expansion will obviously, consumer can carry on some simple wooden through the maintenance, prevent the "heatstroke".
The high-pressure liquid refrigerant through the expansion valve, because the expansion valve throttling pressure drop, the refrigerant into normal temperature low pressure liquid.
常温高压的液体冷媒流过膨胀阀，因为膨胀阀的节流作用压力降低，使得冷媒变成常温低压的液体。
3
No matter it is knot type furnace lining or fabricated furnace lining, when for long time working under the hightemperature it is certain to change (mainly is expansion and contraction or oxidation).