Fluid container unit and method for injecting different kinds of fluids into fluid usage equipment

A method for injecting different kinds of fluids into a predetermined fluid usage equipment, the method comprising:

• a first step for preparing a fluid container unit configured by integrally-assembling a first container and a second container for respectively accumulating the different kinds of fluids in a parallel arrangement, the fluid container unit comprising:
• a) a container coupling for coupling a first supply/discharge port located at one end of the first container with a second supply/discharge port located at one end of the second container;
• b) a single nozzle member having a nozzle tube, and being configured so as to be removably fixed to an injection site of the fluid usage equipment;
• c) a connection cap having one end for holding a base portion of the nozzle member and an other end for covering one side of the container coupling by fitting around an outer periphery thereof;
• d) an intermediate adaptor having a pair of pusher elements facing to the first supply/discharge port and the second supply/discharge port respectively, and being held movably in a direction along a longitudinal axis of the nozzle tube in the connection cap, and
• e) a supply/discharge port opening mechanism for moving the intermediate adaptor toward the container coupling and opening the first supply/discharge port and the second supply/discharge port by the pair of pusher elements,
• a second step for inserting the single nozzle member into the injection site, having a single injection port, of the fluid usage equipment,
• a third step for rotating the nozzle member by the required angle in one direction after said second step.