Control method of control system for controlling water purification module

A control method of a control system for controlling a water purification module for processing water on two sides of a reverse osmosis membrane, the control system including:

• the water purification module having
• a preliminary filter;
• a reverse osmosis filter disposed posterior to the preliminary filter;
• a clean water flow path mounted between the preliminary filter and the reverse osmosis filter;
• an inlet solenoid valve mounted on the clean water flow path;
• a waste water flow path mounted on a waste water side of the reverse osmosis filter;
• an end of the waste water flow path communicating with a waste water outlet;
• a waste water solenoid valve mounted on the waste water flow path;
• a pure water flow path mounted on a pure water side of the reverse osmosis filter;
• an end of the pure water flow path communicating with a pure water outlet;
• a stale water flow path mounted on the waste water flow path;
• an end of the stale water flow path communicating with the pure water flow path;
• another end of the stale water flow path communicating with the waste water flow path;
• and
• an outlet solenoid valve mounted on the stale water flow path;
• and
• a control module connected to the water purification module,
• the control method comprising:
• when the pure water outlet stops discharging water, the control module immediately controlling the water purification module opens the inlet solenoid valve and the waste water solenoid valve to communicate with the clean water flow path, the reverse osmosis filter, and the waste water flow path;
• when the pure water outlet is closed for a period of time, the control module controlling the water purification module opens the inlet solenoid valve and the outlet solenoid valve to communicate with the clean water flow path, the reverse osmosis filter, the stale water flow path, and the waste water flow path;
• and
• when the pure water outlet is open, closing the outlet solenoid valve mounted on the stale water flow path, such that the clean water flow path, the reverse osmosis filter, and the pure water flow path communicate with each other.