Liquid processing apparatus

A liquid processing apparatus, comprising:

• a housing having an upper end opening and a sealed bottom, an outer wall of the housing close to the upper end opening being provided with threads;
• a cover covering the upper end opening of the housing and connected to the housing by the threads;
• a sealing portion provided inside the housing and located beneath a position of an inner wall of the housing to which the threads correspond, the sealing portion being in a shape of a circular disk and having a recessed portion, a seal ring for sealing being provided between a periphery of the sealing portion and the inner wall of the housing, and a sealed accommodation space being formed between the sealing portion and the bottom of the housing;
• a processing portion provided within the accommodation space and in which a liquid processing medium is provided, a peripheral wall of the processing portion being sealed, an upper end of the processing portion having a guide portion, a liquid entering into the processing portion through a bottom of the processing portion, and a liquid processed by the processing portion being guided by the guide portion;
• a liquid inflow portion and a liquid outflow portion provided at an upper part of the housing, the liquid inflow portion and liquid outflow portion being at the same horizontal level when an axis of the housing is in parallel with the gravity direction;
• wherein, the liquid flows into the accommodation space through the liquid inflow portion, and the liquid processed by the processing portion flows out of the accommodation space through the liquid outflow portion;
• and
• a connector connected between the guide portion and the liquid outflow portion and configured to guide the liquid processed by the processing portion to the liquid outflow portion;
• wherein, the connector has a protrusion portion, the protrusion portion being accommodated in the recessed portion of the sealing portion, and the connector is sealed by a second seal ring between an outer side edge of the connector and an inner wall surface of the guide portion.