Solution dispenser for air conditioning microorganism control

A system for controlling the growth of microorganisms in the water condensate pans of air conditioning units, the system comprising:

• A) a volume reservoir means for containing a concentrated biocidal solution;
• B) a pump means having an inlet and an outlet for forcing a solution from said inlet through said outlet under pressure;
• C) a first fluid connection between said inlet and said reservoir means at the bottom thereof for conducting a solution from said reservoir means to said pump means;
• D) a second fluid connection between said outlet and at least one water condensate pan of an air conditioning unit which is unattended for periods of time;
• E) a normally closed, one-way check valve interposed in said second fluid connection for permitting fluid flow therein from said outlet to said at least one condensate pan only when under pressure, said valve preventing reverse fluid flow;
• F) electric power means for operating said pump means for preset intervals of time for dispensing fractions of a solution from said reservoir means;
• G) timer means operatively connected to said electric power means for adjustably controlling the duration of said preset intervals of time when said pump means is operating and the time between said intervals to enable said at least one pan to be periodically provided with a solution during an unattended period of time;
• and
• H) antisiphon means in said second fluid connection between said check valve and said at least one condensate pan, and at least two fluid channels directly connecting said antisiphon means with said at least one condensate pan, said antisiphon means preventing siphoning of fluid between said at least two fluid channels.