Steam drainage energy-saving device

The invention provides a steam drainage energy-saving device which comprises a steam heat exchanger arranged in a machine body and used for conducting heat exchange on the interior of the machine body through steam; the drainage control unit is communicated with the steam heat exchanger and is used for discharging condensate water subjected to heat exchange in the steam heat exchanger; the acquisition unit is arranged on the drainage control unit and is used for acquiring the water temperature in the drainage control unit; and the control unit is electrically connected with the drainage control unit and the acquisition unit, and the control unit is used for controlling opening and closing of the drainage control unit according to the temperature information acquired by the acquisition unit. The steam heat exchanger is subjected to water drainage control through the arranged water drainage control unit, water drainage operation can be effectively conducted according to the water temperature change condition in