Low-temperature adsorption device

The invention provides a low-temperature adsorption device. The low-temperature adsorption device comprises an adsorption container, a plurality of porous sieve plates and a cooling unit. A regeneration adsorbent inlet and a fluid outlet are arranged at the top of the adsorption container. A saturated adsorbent outlet and a fluid inlet are arranged at the bottom of the adsorption container. The porous sieve plates are located inside the adsorption container and installed from top to bottom in order. Each porous sieve plate comprises an upper sieve plate, a lower sieve plate and a refrigerant evaporator. The refrigerant evaporator is located between the upper sieve plate and the lower sieve plate. The cooling unit is located outside the adsorption container. The refrigerant evaporators are connected with the cooling unit. The cooling unit and the porous sieve plates can ensure that a fluid is in a relatively constant temperature state, and the adsorption rate of the adsorption device and the saturated adsorption capacity of adsorbents can be raised effectively.