CROSS-REFERENCE TO EARLIER APPLICATIONS

This application is a § 371 National Stage Entry of PCT/EP2017/077015 filed Oct. 23, 2017. PCT/EP2017.077015 claims priority of IT102016000108293 filed Oct. 26, 2016. The entire content of these application are incorporated herein by reference.

BACKGROUND OF THE INVENTION

The present invention relates to a mixer valve device, intended for mixing hot and cold fluid, in particular hot and cold water.

Electronic thermoregulating mixer valves are known for installations for dispensing domestic hot water.

These valves provide a valve body and a gearmotor that controls the position of a ball shutter arranged inside the valve body, in function of the instantaneous temperature of the mixed water and of the desired temperature. The temperature of the mixed water is detected by a2thermal probe arranged along the outlet path of the mixed water.

Owing to this type of mixer valve it is also possible to thermally disinfect the installation automatically to reduce the risk of proliferation of the legionella bacterium in the installation.

In order to perform this automatic disinfection, at the time and on the day set by the user, the gearmotor moves the ball shutter so as to open completely the hot path and close completely the cold path for a time that is a function of the temperature detected by the thermal probe. The circulation of water at high temperature in the installation causes the installation to be disinfected.

One problem of these mixer valves is that, as they are controlled by a gearmotor that is always moving, they are subject to wear.

Another problem of these mixer valves is that in the event of an interruption to the electric power supply to the gearmotor or of a gearmotor motor fault these mixer valves are unable to perform the thermoregulating task.

The main object of the present invention is to propose a mixer valve device that is able to solve the aforesaid problems.

Another object of the present invention is for this mixer valve device to have low electric consumption.

A further object of the present invention is for this mixer valve device to be reliable over time.

