I t Di it l Inverter vs Digital Confidential Content – NOT for distribution
I t Di it lInverter vs Digital
Confidential Content – NOT for distribution
Issues
• The Inverter technology• The Inverter technology
• Comparison with Digital Scrollp g
Confidential Content – NOT for distribution
THE TECHNICS
The INVERTER COMPRESSOR 1. Frequency Modulation of power supplyq y p pp y
2. Modulation of cooling capacity and consumption
3 Two ways: DC motors or AC motors3. Two ways: DC motors or AC motors
4. + 70% EFFICIENCY vs. ON/OFF
DC MotorBrushless
Motor DC to improve efficiency
-High efficiency to reduce power conversion
P t M t d t d f di
AC Motor needs more power to
Brushless -Permanent Magnets do not need feeding
-Precise control
magnetize the rotor AC current needs to be converted into DC and again into AC
- Conversion Losses
- Additional power needed
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- Additional power needed
THE TECHNICS
LOW STARTING CURRENTS
The system includes a Soft Start:This eliminates the peak starting currents
with very big benefits like:
All t k diAll current peaks disappear
1. Lower maintenance costs ↓1. Lower maintenance costs ↓2. Smaller dimensions for the el. components↓ ↓3. Lower risks for all the el. aparatus ↓ ↓4. Lower vibrations ↓ ↓
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THE TECHNICS
ON/OFF Compressor
ssur
e (b
ar)
Delta Pressure
Pres
ON/OFF = No Modulation
Entalpy (kJ/kg)
Cooling Capacity
Consumpt.
ON/OFF = No Modulation
With half Load, half consumption
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THE TECHNICS
With Inverter modulation
ssur
e (b
ar)
Delta
Pres Pressure
Half capacity:ll d lt T
Entalpy(kJ/kg) Cooling Capacity Lavoro
smaller delta T => exploit coilssmaller delta P => less effort of compressor
But: this requires inverter compressor and EEV
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But: this requires inverter compressor and EEVThe system absorbs much less than a half!
TECHNOLOGY REVIEW
Is it really more efficient??? Note:A car engine is a compressor: it's a volumetric compressor Obviously
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volumetric compressor. Obviously thermodynamic cycle and used gas are very different from a chiller!
TECHNOLOGY REVIEWINVERTER vs DIGITAL SCROLLvs
C t 10%
Consumpt. 100%
Consumpt. 10%
ON: 100x0 5 = 50ON/OFF
ON: 100x0 5 = 50
ON: 100x0.5 = 50ON/OFF
1h3015 45 ON: 100x0.5 = 50OFF: 10x0.5 = 5
Digital unit 1h
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55
TECHNOLOGY REVIEWINVERTER vs Digital Compressor
In essence:
• Inverter exploit evaporating and condensing coil• Inverter exploit evaporating and condensing coilfor twice the time!!
• It's like driving at cruise speed!
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TECHNOLOGY REVIEW
EFFICIENCYGRAND PRIXGRAND PRIX
Std ScrollDigital
Std Scroll
1
32
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3
THE MILESTONE…….i-ACCURATE
• Inverter Compressors
• EEV – Electronic Expansion Valve
• NEW EC-Fan
TRUE• R410a
TRUEEFFICIENCY
TECHNOLOGIC LEADERSHIP
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LEADERSHIP