The utility model relates to the technical field of vacuum pumps, in particular to a low-temperature pump vacuum
assembly with an excellent
adsorption effect, which comprises a pump shell, a
radiation screen, a baffle
assembly and a cold umbrella
assembly, gas can be adsorbed or condensed at a low temperature, a required vacuum environment can be quickly realized, a stable
vacuum state can be kept, and the
machining precision is ensured. Specifically, by arranging the
radiation screen,
heat energy in the environment can be reflected, heat radiated to the internal cold umbrella assembly is reduced, fluctuation possibly caused by heat
radiation to the vacuum environment is reduced, and the stability is good; by arranging the baffle assembly and the cold umbrella assembly and matching with an adsorbent on the baffle assembly and the cold umbrella assembly, gas molecules in the environment can be subjected to multi-stage adsorption or condensation at a low temperature, and efficient adsorption is realized to achieve a required vacuum environment; meanwhile, the baffle assembly is arranged on the outer side of the cold umbrella assembly, heat radiation in the environment can be reflected, the influence of external environment factors on the vacuum degree and the stability of the vacuum degree is reduced, and the stability of the vacuum environment is good.