Runner type mold dehumidifier

The utility model relates to the technical field of plastic molding machinery and particularly relates to a runner type mold dehumidifier. The runner type mold dehumidifier comprises an adsorption runner, a regeneration system and a drying system, wherein the regeneration system comprises a regeneration filter, a regeneration fan and a heater; air sequentially passes through the regeneration filter, the regeneration fan and the heater and then enters a regeneration region of the adsorption runner; the drying system comprises a returned air filter, a returned air cooler, a drying fan, an output air cooler and a water storage tank; returned air or air of a mold is subjected to returned air filtering, cooling and drying, then enters a treatment region of the adsorption runner, is output from the treatment region of the adsorption runner, passes through the output air cooler and then is dried and discharged; dew condensed on the returned air cooler is received by the water storage tank; and an adjusting valve is arranged at a cooling water inlet end of the output air cooler. According to the runner type mold dehumidifier provided by the utility model, the temperature for drying the air can be reduced so that the dew is not condensed on the surface of the mold, and the quality of a plastic product is improved; and the water storage tank has an automatic water discharging function and can be used for discharging the condensed dew out of the machine in time, so that the stable dehumidification performance is realized.