吸附式制冷，也称吸附式制冷系统，是一种制冷系统。其基本结构由发生器、冷凝器、储液器、蒸发器、吸附器和阀门等模块组成。

吸附式制冷系统的运作机制为：

• 在白天，集热器温度随着气温的升高而升高，制冷剂蒸发集热器中压力升高，气体进入冷凝器并冷凝、制成液体。
• 在晚上，温度降低，吸附剂会吸收制冷剂蒸汽，蒸发器中压力降低，于是会有更多液体气化，蒸发中吸收热量降温。

An absorption refrigerator is a refrigerator that uses a heat source (e.g., solar energy, a fossil-fueled flame, waste heat from factories, or district heating systems) which provides the energy needed to drive the cooling process.

Absorption refrigerators are often used for food storage in recreational vehicles. The principle can also be used to air-condition buildings using the waste heat from a gas turbine or water heater. Using waste heat from a gas turbine makes the turbine very efficient because it first produces electricity, then hot water, and finally, air-conditioning (called cogeneration/trigeneration).