Membrane unit and hand washing device

A membrane unit comprising:

• a cross-flow membrane filter,
• a cylindrical casing that houses the membrane filter,
• a cap that detachably occludes the casing, the cap being provided with:
• an inflow port that allows water to flow into the casing;
• a first discharge port that discharges, to outside of the casing, permeated water obtained as a result of water that flows into the casing from the inflow port permeating the membrane filter;
• and
• a second discharge port that discharges, to the outside of the casing, concentrated water obtained as a result of water being concentrated as a result of the permeated water permeating the membrane filter, and
• a positioning member which is fixed to the cap taking the first discharge port as a reference, and which defines a position of the membrane filter inside the casing;
• wherein:
• in the cap, a first valve member is arranged in the inflow port, the first discharge port, and the second discharge port, respectively;
• and
• a socket is attached to the cap and causes the first valve members to open, respectively.

A hand washing device comprising:

• a first casing,
• a wash-hand basin provided in one part of the first casing,
• a faucet having a spout that spouts washing water, and
• a circulation mechanism which has at least one part provided inside the first casing, and which purifies drained water from the wash-hand basin and circulates the water that is purified as the washing water,
• wherein:
• the circulation mechanism comprises a membrane unit, and
• the membrane unit comprises:
• a cross-flow membrane filter,
• a cylindrical second casing that houses the membrane filter,
• a cap provided with:
• an inflow port that allows the drained water to flow into the second casing;
• a first discharge port that discharges, to the circulation mechanism, permeated water obtained as a result of drained water that flows in from the inflow port permeating the membrane filter;
• and a second discharge port that discharges, to the circulation mechanism, concentrated water obtained as a result of the drained water being concentrated as a result of the permeated water permeating the membrane filter, the cap detachably occluding the second casing, and
• a positioning member which is fixed to the cap taking the first discharge port as a reference, and which defines a position of the membrane filter inside the second casing,
• wherein, in the cap, a first valve member is arranged in the inflow port, the first discharge port, and the second discharge port, respectively, and
• wherein a socket is attached to the cap and causes the first valve members to open, respectively.