Beverage dispensing machine with improved liquid chiller

A beverage dispensing machine connected with an electric power supply and a pressurized water supply, said machine includes a water-chilling and delivery means, a liquid beverage concentrate supply and delivery means;

• a water and concentrate mixing means with a related beverage dispensing tube and connected with and receiving water and concentrate from the water-chilling and delivery means and the concentrate supply and delivery means;
• the water-chilling and deliver means includes an elongate pressure sealed water tank with upstream and downstream end portions, a water supply line connecting one end portion of the tank with the water pressurized water supply a check valve in the water supply line, a water delivery line connecting the other end portion of the tank with the mixing means;
• a normally closed electrically actuated water valve means connected in the water delivery line and operating to start and stop the flow of water from the water supply system to the mixing means;
• an electrical-powered refrigeration machine connected with the power supply and including an elongate expansion coil with upstream and downstream end portions at opposite end portions of the tank and extending throughout the tank, an electric-powered water pump with suction and discharge sides connected with opposite end portions of with the tank and operating to maintain water recirculating through the tank and about the expansion coil;
• the concentrate supply means includes a bottle of liquid concentrate, a concentrate delivery line extending between the bottle and the mixing means, an electric-powered concentrate pump in the concentrate delivery line to move concentrate from the bottle to the mixing means;
• and, a manually operable switch connected in the power supply to the valve means and concentrate pump and selectively operable to energize the concentrate pump and to open the valve means;
• and, a normally closed pressure-actuated switch in the power supply to the refrigeration machine and responsive to pressure in the tank and operating to open when the pressure in the tank exceeds a set maximum operating pressure.