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What is the expansion valve in HVAC & How it
works ????????????
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Answer Posted / phanikumar
In this expansion valve, at the discharge of evaporator,
the state of refregerant is in gasious state. Expansion
valve is provided at the inlet line of evaporator.
Depending upon the state of the evaporator outlet, the
expansion valve will allow the quantity of the refrigerant
or flow of the refrigerant.
ex: evaporator outlet refr. is in vapour state. that
vapour will enter into the top portion of the diaphragm.
so as pressure increases on the diaphragm, the diaphragm
will down the valve. then refr. enters into the inlet line.
when this pressure on the diaphragm increases?
whenever there is a load in the evaporator is higher than
refr. flow.
so we have to supply more refr. corrponding to that
evaporator load. so we have to supply more refr. for this
purpose we are providing an mechanical auto valve i.e.
expansion valve.
another point we have to consider is, the property of the
refrigerant. it can easily cooled and easily boiled.
if u want diagram, then u send ur mail address, then i will
send the clear diagram and explonation
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