The utility model relates to a chemical industry equipment field, concretely relates to condenser. The utility model discloses an one -level condensation chamber and second grade condensation chamber carry out the secondary condensation to the solvent, then the condensate passes through during the return water pipe gets into the return tank, and not only the condensation is effectual, realizes the condensation function moreover simultaneously and retrieves function, convenience simple to use, the utility model discloses the condensing agent that the second grade condensation chamber adopted is the refrigerant, and is harmless to natural environment, does not damage the ozone layer, and green house effect is low, and is nontoxic, does not possess explosivity and flammability, effectively ensures staff's life safety, the utility model discloses simple structure consumes low battery, and use cost is little, does benefit to extensively to use widely.