Daikin VRV III - Page 19

Features ED34-862
14 General Information
3
7
DC fan motor
4
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.
5
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 HP).
• Efficiency improvement by approximately 40% especially
at low speed.
6
Smooth sine wave DC Inverter
By adoption of the Sine
Wave, which smoothes the
rotation of the motor,
operation efficiency is
improved sharply.
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 motor
AC motor
AC motor
AC motor
DC motor efficiency
( comparison with a conventional AC motor )
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 high COP and larger capacity
Reluctance DC scroll compressor
High torque and efficiency is attained with the adoption of
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
Note: Data are based on studies conducted under controlled conditions
at a Daikin laboratory.
Approx.
Approx.
40%
increase
increase
Approx.
40%
increase
DC motor
DC motor
DC motor
DC motor
DC motor
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