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

Confidential Content – NOT for distribution

- 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 ↓ ↓

Confidential Content – NOT for distribution

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

Confidential Content – NOT for distribution

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

Confidential Content – NOT for distribution

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

Confidential Content – NOT for distribution

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

Confidential Content – NOT for distribution

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!

Confidential Content – NOT for distribution

TECHNOLOGY REVIEW

EFFICIENCYGRAND PRIXGRAND PRIX

Std ScrollDigital

Std Scroll

1

32

Confidential Content – NOT for distribution

3

THE MILESTONE…….i-ACCURATE

• Inverter Compressors

• EEV – Electronic Expansion Valve

• NEW EC-Fan

TRUE• R410a

TRUEEFFICIENCY

TECHNOLOGIC LEADERSHIP

Confidential Content – NOT for distribution

LEADERSHIP