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1.10 Operating principle
The operation of humiSonic humidifiers is based on the principle of
atomisation of demineralized 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 air flow in the duct carries the particles
of moisture and distributes them into the surrounding environment);
•
water refill based on the float 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 vapour
that is immediately absorbed by the flow of air.
Dopo l'accensione
After switching on
Trasduttore / Transducer
Ampiezza negativa
Negative amplitude
Vuoto / Vacum
Trasduttore / Transducer
Ampiezza positiva
Positive amplitude
Trasduttore / Transducer
Fig. 1.h
1.11 Accessories
•
BMS/RS485 serial card (P/N PCOS004850): to be installed on the control
board on the ""Main"" panel, used for direct interface to an RS485
network, with a maximum baud rate of 19200. The board guarantees
opto-isolation of the controller from the RS485 serial network.
•
Humidity/temperature probes for ducts, CAREL P/Ns DPD*(T/H),
DPP*(T/H). Used in ducted heating and air-conditioning systems.
Supplied together with a mounting bracket. See manual +030220660.
1.12 Structure
The figure shows the body of the humidifier, once having removed the
side panels and the cover (see chap. "Spare parts and maintenance").
2
1
8
12
11
R
7
5
6
8
Key
F Front
R Rear
1 Lifting handles
2 Rear diffuser
3 Front diffuser
4 Baffle
5 Fill valve
6 Drain valve
9
"humiSonic ventilation" +0300063EN - rel. 1.3 - 14.05.2021
ENG
F
3
4
1
5
6
10
9
8
7
1
13
Fig. 1.i
7
Terminal block
8
Fastening bracket
9
Bracket with cable glands
10 Piezoelectric transducer
11 Electronic control board
12 Driver
13 Air intake
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