液体汽化制冷是利用液体汽化时的吸热、冷凝时的放热效应来实现制冷的。液体汽化形成蒸汽。当液体（制冷工质）处在密闭的容器中时，此容器中除了液体及液体本身所产生的蒸汽外，不存在其他任何气体，液体和蒸汽将在某一压力下达到平衡，此时的汽体称为饱和蒸汽，压力称为饱和压力，温度称为饱和温度。平衡时液体不再汽化，这时如果将一部分蒸汽从容器中抽走，液体必然要继续汽化产生一部分蒸汽来维持这一平衡。 液体汽化时要吸收热量，此热量称为汽化潜热。汽化潜热来自被冷却对象，使被冷却对象变冷。为了使这一过程连续进行，就必须从容器中不断地抽走井盖钢模具 U型槽模具 天津水处理设备 检查井钢模具 保定公司注册 u型槽模具 流水槽模具 蒸汽，并使其凝结成液体后再回到容器中去。从容器中抽出的蒸汽如直接冷凝成液体，则所需冷却介质的温度比液体的蒸发温度还要低，我们希望蒸汽的冷凝是在常温下进行，因此需要将蒸汽的压力提高到常温下的饱和压力。
Liquid vaporization refrigeration is based on the heat absorption of liquid vaporization and the exothermic effect of condensation. The liquid vaporizes to form vapor. When the liquid (refrigerant) is in a closed container, there is no other gas except the liquid and the vapor generated by the liquid itself. The liquid and steam will reach equilibrium at a certain pressure. The vapor at this time is called saturated steam, the pressure is called saturation pressure, and the temperature is called saturation temperature. In equilibrium, the liquid will not vaporize any more. At this time, if a part of steam is pumped from the container, the liquid must continue to vaporize to produce a part of steam to maintain this balance. Liquid vaporization to absorb heat, this heat is called latent heat of vaporization. The latent heat of vaporization comes from the object to be cooled and makes it cool. In order to make this process continuous, it is necessary to continuously extract the steam from the container and condense it into liquid before returning to the container. If the steam extracted from the container condenses directly into liquid, the temperature of the cooling medium required is lower than the evaporation temperature of the liquid. We hope that the condensation of the steam is carried out at normal temperature, so it is necessary to increase the steam pressure to the saturation pressure at normal temperature