Professional coffee machine

A professional coffee machine comprising:

• a supporting frame (2);
• a boiler (12) mounted to said supporting frame and comprising a tank (11), which is supplied with water and which is provided with a heater;
• at least one preheater (30) for preparation of a coffee infusion, comprising a first heat exchanger, which is associated to said boiler (12) so that the water contained and heated in said boiler heats, by heat exchange, supply water which crosses said first heat exchanger to a first temperature T1, said first temperature T1 being lower or substantially equal to a second temperature T2 which corresponds to a desired temperature to prepare the coffee infusion;
• a dispensing unit (4) of the coffee infusion, provided with a thermo-controlled heating element (44), which is configured to bring the water released from said preheater (30) to said second temperature T2 if said first temperature T1 is lower than said second temperature T2;
• a thermal insulating member (34) that mechanically constrains said dispensing unit (4) to said supporting frame (2) of the coffee machine;
• a heater (28) for preparation of a tea infusion, comprising a second heat exchanger associated to said boiler (12) so that the water contained and heated in said boiler (12) heats, by heat exchange, supply water which crosses said second heat exchanger up to a third temperature T3, said third temperature T3 corresponding to desired temperature to prepare the tea infusion;
• and
• a dispenser (8) of hot water to prepare the tea infusion, connected to said second heat exchanger of said heater (28) with a conduit provided with an intercepting member (62) of water flow heated to said third temperature T3.