Daikin RXYQ32PY1 [4/38] Vrviii created to respond to the needs of large sized buildings

Daikin RXQ40PY1 [4/38] Vrviii created to respond to the needs of large sized buildings
Cutting-Edge Technologies
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Daikin’s constant efforts have been devoted towards using the latest and most revolutionary technologies in the
development of the VRVIII system for large-sized buildings. The system offers larger outdoor capacities, greater energy
savings, easier installation, longer actual and total piping, and more.
VRVIII —Created to respond to the needs of large-sized buildings
The new heat exchanger contributes to a higher COP
because of an increase from 7% to 10% of the effective
length as well as an optimised e-Pass heat exchanger.
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2
6
3
7
5
3
4
7
2
A higher external static pressure has been achieved–from 58. 8 Pa to 78.4 Pa–thanks to
reduced internal pressure loss, use of the new fans and the new grilles.
The area of these new fan blades has been increased and optimised for each casing. This greatly reduces pressure loss, resulting in a
higher external static pressure.
The three-bladed fan on the 10 class (28 kW) unit, with a
diameter of 700 mm, has been redesigned to include four
blades and now has a diameter of 680 mm. Blade area has
been increased by 25%.
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Newly improved fans and grilles
Heat exchanger
DC fan motor
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Heat transfer circuit
By performing super cooling before the expansion
process, the volume of refrigerant that needs to be
circulated to the indoor units can be reduced without
lowering the evaporation temperature. This permits the
use of narrower piping.
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Compact aero box
Realises a compact casing by stacking the Inverter and
control PCBs plus optimising the internal design to suit
airflow speed. This achieves lower noise and reduces the
power required by the large-diameter fanned outdoor unit.
• Across entire range of models (from 5 to 54 class (from 14
to 147 kW)).
• Efficiency improvement by up to 40% especially at low
speed.
New
New
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Smooth sine wave DC Inverter
By adoption of the Sine
Wave, which smoothes the
rotation of the motor,
operation efficiency is
improved significantly.
DC fan motor
structure
200 300 400 500 600 700 800 900 1000
0
20
40
80
60
100
Efficiency (%)
Motor speed (
rpm
)
AC motor
AC motorAC motor
DC motor efficiency
(
comparison with a conventional AC motor
)
New aero spiral fan and aero asymmetrical fan
Aero smooth grille
New aero asymmetrical fan
In the 14 and 16 class (40 and 45 kW) unit, a single fan with a
diameter of 700 mm has been split into two fans with diameters
of 540 mm each. Blade area has been increased by 20% to
increase airflow.
New aero spiral fan (Powerful Dual DC fan)
Ferrite magnet
Secret to raising energy-efficiency!
Powerful magnets
Secret to raising energy-efficiency!
Powerful magnets
Neodymium magnets are much more
powerful than the widely used ferrite magnets.
Neodymium magnet
Reluctance
DC motor
Improving the high efficiency compressor to achieve
a higher COP and larger capacity
Reluctance DC scroll compressor
High torque and efficiency is attained by employing neodymium
magnets. Achieves 70% reduction in volume.
Daikin’s unique scroll compressor minimises heat loss, and is driven by a high
efficiency motor to achieve significant energy savings.
By introducing high pressure oil, the reactive
force from the fixed scroll is added to the internal
force, thereby reducing thrust losses. This
results in improved efficiency and suppressed
sound levels.
High-performance, low-noise new scroll
compressor operates at a faster rate.
The speed increase has been achieved
through advanced stress analysis for
increased strength and utilisation of the
advantages (oil film control) of the high
thrust mechanism*.
*High thrust mechanism
VRVII
The three-dimensional, integrated, soft woven steel grilles are
covered with a plastic coating that protects them from rotating
elements and the possibility of fire
damage.
Blade area
increased by
25%!
VRVII
Blade area
increased by
20%!
Diameter of 700 mm
Diameter of 540 mm x 2
Perspective view
New

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