The invention provides a low-condensing-pressure deep
supercooling efficient dehumidifier. The low-condensing-pressure deep
supercooling efficient dehumidifier comprises an air
flue, a first draught fan and a refrigerating and dehumidifying
system. The refrigerating and dehumidifying
system comprises an
evaporator, a first condenser, a second condenser, a compressor and a throttling device. According to the low-condensing-pressure deep
supercooling efficient dehumidifier, a bypass
airflow channel is additionally arranged in the air
flue between the first condenser and the second condenser, so that the ventilation quantity of the first condenser is increased, and the condensing pressure of refrigerating fluid gas in the condensers is reduced; the first condenser is used for heat release and cooling of a
sensible heat portion of the overheated refrigerating fluid gas and heat release, condensation and
liquefaction of the refrigerating fluid gas, and the second condenser is used for cooling and supercooling of refrigerating fluid; since a finned
thermal bridge between the first condenser and the second condenser is disconnected, the supercooling degree of the refrigerating fluid at the
tail end of the second condenser is improved, the
vaporization ratio of the refrigerating fluid in the throttling device can be lowered, the
evaporation and heat
absorption capacity of the refrigerating fluid in the
evaporator is improved, and the energy efficiency ratio of the dehumidifier is increased substantially.