Operating Principle; Structure - Carel HumiSonic Manual Del Usuario

Key
1 Air filter
2 Rear fans
3 Atomised water
4 Diffuser
5 Atomisation chamber
6 Fill valve
7 Overflow pipe
8 Drain valve

3.10 Operating principle

The operation of humiSonic humidifiers is based on the principle of
atomisation of demineralised water using ultrasound technology. The
humidifier operating principle can be summarised as follows:
• water fill via a fill solenoid valve until reaching the required level,
measured by the float;
• if the autotest is enabled (default), the drain solenoid valve opens and
empties the tank (function designed to clean the tank of any residues/
dirt);
• water filled again to the required level;
• start ultrasonic atomisation (the fans installed on the humidifier expel
the particles of moisture and distribute them into the surrounding
environment);
• water refill based on the float, which measures that the level has fallen
below the recommended value.
Ultrasound technology uses a voltage input signal that is transformed
via an oscillating circuit into a high frequency signal (1.7 MHz). This signal
supplies a transducer, the top of which is in contact with the water, which
starts vibrating at high frequency. The surface of the transducer vibrates
at very high speed (1.7 million times a second), a speed that does not
allow the water to move, due to its inertial mass. Consequently, a column
of water is created above the transducer. During the negative amplitude
of the transducer cycle, a void is created that is not filled by the water (as
this cannot respond to the extremely fast movements of the transducer).
The cavity thus created leads to the production of bubbles that are
pushed to the edge of the water column during the positive amplitude
of the cycle, thus colliding. During this process, very fine particles of water
are atomised on the edge of the water column. The resulting intersecting
sound waves created directly underneath the surface of the water cause
very small droplets of water to separate, forming a fine mist of water that
is immediately absorbed by the flow of air.
After switching on
Transducer
9 Float level sensor
10 Tank
11 Driver
12 Piezoelectric transducer
13 Power supply
14 Front fans
15 Laminar air flow
Negative amplitude
Positive amplitude

3.11 Structure

The figure shows the structure of the humidifier, once having removed
the side panels and the cover (see chap. "Maintenance and spare parts").
8
9
7
14
R
6
5
12
Key
F Front
R Rear
1 Rear diffuser
2 Front diffuser
3 Fill valve
4 Drain valve
5 Piezoelectric transducer
6 Driver
7 ON/OFF switch
8 Electronic control board
9 Transformer (24 V)
9 Direct version for room applic. +0300062EE - rel. 1.4 - 24.09.2020
Vacum
Transducer
Transducer
Fig. 3.j
F
1
2
6
11
5
B D
L N
PE
10 13
A C E
Fig. 3.k
10 Power supply (48 V)
11 Front fan
12 Rear fan
13 Terminal block
A Earth terminal (PE)
B Power terminals
(L, N) with fuse carrier
C Alarm relay terminals
D Power supply (48 V) terminal
with fuse carrier
E Reserved
14 Temperature and humidity probe
(where featured)
ENG
3
4