Transcript SURGICAL ROOM AIR CONDITIONERS SURGICAL ROOM AIR CONDITIONERS The air conditioning system for surgical rooms must assure a “high air quality”. To get it the following “six goals” must.

SURGICAL ROOM AIR CONDITIONERS
SURGICAL ROOM AIR CONDITIONERS
The air conditioning
system for surgical rooms
must assure a
“high air quality”.
To get it the
following
“six goals”
must be
achieved:
First goal
Elimination or
minimization
of the chemical
contamination
due to the
anestetical gas
Second goal
Elimination
of the
batteriological
contamination
coming from
the external
environement
(through
fresh air).
Third goal
Elimination
of the
batteriological
contamination
coming from
the surrounding
environments
Fourth goal
Fourth goal
Reduction
of the
batteriological
pollution
due to the
surgical team
or to
the patient
himself
Reduction of
the
batteriological
contamination
due to the
surgical team
or to the
patient himself
Fifth goal
Guaranty a
good level
of control of
temperature
and
humidity
Sixth goal
Obtain the
first 5 goals
guarantiing
the
maximum
energy
saving
The air conditioning system for surgical rooms must assure a
“high air quality”.
First goal:
Elimination or
minimization
of the chemical
contamination
due to the
anestetical gas
Chemical contamination
cannot be filtered;
the only solution
is the dilution with a
great quantity of fresh air.
First goal:
Elimination or
minimization
of the chemical
contamination
due to the
anestetical gas
How great?
This depends by the local Standard:
In Italy
15 volumes per hour
In Germany
1.200 m3/per hour
In Switzerland
800 m3/per hour
The fresh air flow must be constant in
time even if the filters become dirty and
therefore raise there pressure drop.
Technical
considerations
about the
first goal
Within the unit an air flow measurer is
therefore foreseen to informs the
microprocessor of the reduction.
The microprocessor raises through the
inverter the number of revolution of the
fan so to get the set air flow.
Double fan for
supplying and
expelling air
for the maximum
functionment
security.
(Accessory)
Second goal
Eliminationg of the
batteriological
pollution from
the external
environement
(through fresh air).
The batteriological pollution
coming from outside is
eliminated through the absolute
filters to be fitetd at the end of
the supply ducts: H12 for
general surgery, and H14 for
orthopedics and more delicate
operations.
Technical
considerations
about the
second goal
The absolute filter must be
the last component of the
aeraulic circuit since everything
between it and the patient can
contaminate the treated air.
The absolute filter is therefore
installed in the surgical
room immediately above
the operating bed.
Technical
considerations
about the
second goal
The EN10339 Standard , for the
duration in time of the fresh air
filters, foresees that before an
absolute filter another F9 fine
filter be installed and before this
a G4 filter.
Direct expansion
surgical room air
conditioner
MODEL OHA
132/R407
AIR FLOW:
4.400 m3/h
Technical
considerations
about the
second goal
The blocking device of the filter
on its gasket must guaranty that
the air cannot by-pass the filter
itself. The good efficency of the
filtrating section must be
guarantied and not only of the
filter according to the EN 1886
Standard
Third goal
Elimination of the
batteriological
contamination from
the surrounding
environments
The batteriological
contamination coming from the
surrounding environments is
eliminated by mantaining the
room is overpressure respect to
them.
Third goal
Elimination of the
batteriological
contamination from
the surrounding
environments
To mantain an environment
in over/underpressure in
respect to a reference one
it is sufficient to extract
more or less air than the
one supplyed in.
Third goal
Elimination of the
batteriological
contamination from
the surrounding
environments
The opposite is true in case of septic
or dirty operations; the surgical room
must be mantained in depression so
not to pollute the surrounding
environements.
Technical
considerations
about the
third goal
A differential pressure pressostat
mounted between the surgical room
and the clean corridor informs the
microprocessor of the situation of
over/underpressure in the room.
The microprocessor then confronts this
with the desired situation and acts on
the exaust fan inverter raising or
reducing the quantity of the expelled air
from the environment.
Mounting within
the room
Fourth goal
Reduction of the
batteriological
pollution due to the
surgical team
or to the patient
himself
The endogenous
batteriological pollution
from the patient or from the
surgical team is eliminated
by filtering with absolute
filters as frequently as
possible the treated air.
How is it done?
Fifth goal
Guaranty a
good level
of control of
temperature and
humidity
With treatment sections that guaranty
the high quantity of fresh air throught
thermodynamic components both for
the control of humidity and temperature
with modulating capacity control.
Even in the case of direct expansion
units the frigorific capacity is modulated
by an electronic injection of hot gas.
Sixth goal
Guaranty the
maximum
energy saving
How is it done?
Raising as much as possible
the recirculation: obviously in
respect to the local Standard
How is it done?
Sixth goal
Guaranty the
maximum
energy saving
Night Stand-by of the units, activable from
the presence feelers, BMS, hour timetables
or manualy:
1: Reducion of the capacity by 1/3 of theal
fffffffnominal one, external one
2: Mantaining the overpressure
3: Raising the dead range from 0,3 ° to 10 °
How is it done?
Sixth goal
Guaranty the
maximum
energy saving
In case of no
recirculation:
Local Standards or septic
environemnts to be
mantained in depression
a heat recovery system
must be foreseen.
CHILLED WATER
SURGICAL ROOM AIR
CONDITIONER
WITH HEAT
RECOVERY SYSTEM
MODEL OHU 208
AIR FLOW: 6.900 m3/h
DIF-O.T.
CEILING
FILTRATION
SYSTEM
DIF-O.T.
CEILING
FILTRATION
SYSTEM
Thank you