Daikin RKS85HVM Benutzerhandbuch - Seite 4

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Energy Savings
Inverter Advantages Compared to Non-Inverter
Inverters are devices that are able to vary their operating capacity by adjusting frequency. Inverter air
conditioners can vary their cooling capacity by adjusting the power supply frequency of their compressors.
In contrast, non-inverter air conditioners have a xed cooling capacity and can only control the indoor
temperature by starting or stopping their compressors.
Powerful
Variable Capacity Operation
Inverter air conditioners operate at
Inverter Power Control
maximum capacity as soon as they
Power
start up. As a result, the set
source
temperature can be reached more
quickly.
Non-inverter type air conditioner
Energy Saving
Power
source
After the indoor temperature
approaches the set temperature,
Inverter air conditioners are able to vary their operating capacity. Non-inverter air conditioners can
Inverter Control adjusts to low
only operate at a xed capacity.
capacity operation to maintain this
temperature. This makes inverter
models more energy-saving than
Comfortable Temperature Control
non-inverter models, which must
repeatedly start or stop their
Temp.
compressors to maintain the room
temperature.
Comfortable
Set
Inverter air conditioners nely adjust
temp.
capacity according to changes in the
air-conditioning load and the di erence
Cools a room
between the indoor temperature and
in less time
set temperature is small. These give
higher comfort levels than with non-
inverter air conditioners.
Starts
Compressor
High
capacity
Raise frequency
High-speed rotation
Low
Lower frequency
Low-speed rotation
capacity
Compressor
Constant speed
Fixed capacity
rotation
Not cool
Compressor o
Compressor o
Small temp.
di erence
Too cool
During cooling operation
Non-inverter type
Inverter type
This diagram is a representation for illustrative purpose only.
5
Energy-Saving Technological Features
Swing Compressor
Swing compressor
Reluctance DC motor
Reluctance DC Motor for Compressor
Daikin DC Inverter models are equipped with
the Reluctance DC motor for compressor. The
Reluctance DC motor uses 2 di erent types of
torque, neodymium magnet*
torque*
more power with a smaller electric current than
AC or conventional DC motors. It is more
e cient at the low frequencies most commonly
Neodymium magnets are used
used by air conditioners,*
in the pink-coloured area.
by approximately 20%.
*1. A neodymium magnet is approximately 10 times stronger than a standard ferrite
magnet.
*2. The torque created by the change in power between the iron and magnet parts.
*3. The frequency range used by air conditioners during periods of stable operation.
This is the range in which air conditioners operate for the longest periods.
DC Motor for Fan
Time
The DC motor allows ne rotation
control, which reduces energy
consumption. The motor also
provides improvements in
operational e ciency of up to 40%,
compared to an AC motor. These
improvements are particularly
noticeable in the low-speed range.
What Is DC Inverter?
Daikin calls an inverter model that is equipped with a DC motor DC Inverter. A DC motor o ers higher e ciency
than an AC motor. A DC motor uses the power of magnets to attract and repel to generate rotation. A DC motor
that is equipped with high-power neodymium magnets, which enable even greater e ciency, is called a Reluctance
DC motor.
Thanks to its smooth rotation, the
swing compressor decreases
friction and vibration. It also
prevents the leakage of
refrigerant gas during
compression. These advantages
provide quiet and e cient
compression.
The swing compressor can
reduce operational vibration and
sound because its piston moves
smoothly inside the compressor.
E ciency of Reluctance DC motor
90
and reluctance
1
. This motor saves energy by generating
2
80
70
3
improving e ciency
60
50
0
Small load
Low capacity
*4. Data are based on studies conducted
under controlled conditions at a Daikin
laboratory using Daikin products.
PAM Control
5
E ciency of DC motor for fan
*
(comparison with a conventional AC motor )
100
80
DC motor
Approx.
60
20%
increase
PAM (Pulse Amplitude Modulation)
40
control reduces energy loss by
Approx.
AC motor
40%
controlling how often the converter
increase
20
switches on and o .
0
200
300
400
500
600
700
800
900 1000
Motor speed (rpm)
*5. Data are based on studies conducted
under controlled conditions at a Daikin
laboratory using Daikin products.
6
Refrigerant gas
Swing bush
Integral piston of
blade and roller
*
4
Reluctance DC motor
Conventional
DC motor
More than 20%
AC motor
30
60
90
120
Rotational speed (rps)
Large load
High capacity