The present invention relates to a submersion device and a submersion method of a porous medium for injecting water into a porous medium used for mushroom cultivation, and more particularly, to the upper part of the internal space of the submersion tank through a backflow prevention port installed in a lid that closes the submersion tank. consists of a non-submerged space where water does not fill up, and the air in the non-submerged space is forcibly discharged through an exhaust pipe installed on the lid to be connected to the motor to depressurize the submerged tank, and the pressure bar to rise into the non-immersed space After removing air from the pores of the submerged porous medium to block this It relates to a submersion device and a submersion method for a porous medium that prevents the porous medium from being exposed to the outside of the water during the submersion process by re-injecting water.
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