5. CONSTRUCTION
Major components of the air heater PROTON GUARD
Diuser
Fan
Heat exchanger
The heat exchanger consists of copper tubes and aluminum lamellas pressed on
them. It is equipped with copper pipes with threading connection (external
thread 3/4”). The copper-aluminum heat exchanger is distinguished by high
eciency, is not exposed to corrosion if you don’t use substances and
impurities in a heat medium causing copper corrosion. Maximal parameters of
heat medium supply are 105 °C/1,6 MPa. The air heaters PROTON GUARD are
equipped with the heat exchanger with polymeric protection cover with
enlarged thickness and interlamellar distance, that allows to use them
eectively in the agriculture sector.
Only plastic diusers are used for this series produced by the method of
vacuum molding. In addition to creating a form around an impeller, the diuser
performs a role of a body to fix a fan and additional stiening ribs are provided
ad hoc. The diuser is fixed to a heat exchanger by a flat side, that enables to
fully use air charged by a fan to move through lamellas of the heat exchanger.
The fan is fixed in a plastic diuser on the back of the unit, thanks to which air
can be eectively charged in a heat exchanger. The diuser is made in the
shape of a ring around fan blades as well as creates a body of the air heater.
Fans applied are axial and can have either single-phase electronically
commutated or single-phase asynchronous motors. These fans are
manufactured in a single production process, tested and balanced by the
manufacturer, installed on a protection grill which protects the heater from
falling in of debris, leaves etc. as well as prevents possible personnel injures or
death caused by rotating fan blades.
PROTON G 710 with single-phase asynchronous motor
This type of motors can work only with nominal voltage of 230 V. To start the
motor a capacitor is needed, so the latter is installed into the motor, and this
eliminates the necessity of using external elements to be connected to the
power network. The use of the single-phase motor enables regulation of
rotation speed by additional step-down transformers or to use of additional
contacts from motor windings with dierent powers.
PROTON G 750 with electronically commutated motor
The motor contains a built-in electronic controller which enables to set rotation
speed. This technology makes possible remote smooth regulation of the motor
and increases its eciency. Using appropriate control elements in an automatic
mode you can maintain necessary speed for as comfortable as possible relation
between noise of blades and heating power of the unit. Construction of these
motors doesn’t dier from asynchronous ones.
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