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Balancing oil control technology
Balancing oil technology among modules
Change the defect of traditional timer oil return; it’s needless to turn off the unit to balance the oil, judge
the operation status of each module and compressor, calculate the oil reserve capacity of compressor,
adjust the operation status of compressor to realize oil balance among modules. The non-balancing oil
pipe design ensures the reliability and will not affect the capacity output of the system to maintain AC
comfort.
Oil balance technology among compressor
The refrigerant has a suction pipe in the compression working chamber of the compressor, and is
compressed and discharged into the cavity of the totally enclosed compressor, and then flows through
the refrigeration system through the exhaust pipe. According to the principle of motion fluid mechanics
and the actual amount of oil required in the working process of the compressor, the height of the oil
balance pipe is determined, the oil level of the oil pool is controlled; the minimum oil quantity required
for each compressor during operation is ensured to realize the oil balance among the compressors.
Cooling adopts the subcooling control technology to reduce cooling capacity substantially
New generation of efficient plate subcooler and condensate depression control method is adopted, the
maximum condensate depression is 35
℃
, AC effect is more obvious.
Unique comfort control
ODU adopts dual electronic expansion valve for adjustment, the grade of main electronic expansion
valve is 3,000 and the subcooling electronic expansion valve is 480, precisely controlling the flow of
modules in IDU and ODU.
Considering the installation characteristic (IDU type, pipe length, fall etc.), actual startup rate of IDU,
ambient indoor and outdoor temperature, diversified system startup is realized under different ambient
temperature and installation condition, the fastest startup is completed in 75s.
Humanized operation
Auto address allocation and non-polarity communication
Auto debugging and error detection
Five kinds of auto debugging function
Auto allocation of IDU and ODU address
Auto detection of IDU and ODU quantity
Auto detection of internal error of the unit
Start operation debugging automatically
Real-time judgment of pieline abnormality
The unit has three emergency functions of module, compressor and fan
The unit has two methods of recycling refrigerant
Intelligent management
Dual energy saving operation mode;
With the deepening of energy conservation and emission reduction and the stricter national
requirements to urban electricity consumption, especially in summer, the peak season of electricity
consumption, many cities will introduce corresponding power-limiting measures. Gree DC inverter multi
VRF system has two energy-saving modes for users to choose freely to meet the requirement on peak
power consumption and power-limiting.
Capacity first: If there is sufficient power supply, priority is given to meeting the capacity needs. This
mode is default factory setting.
Auto energy-saving: System will automatically adjust parameters and balance the capacity and
energy consumption according to the running state.
Forcible energy-saving: Capacity output of ODU is limited. Depending on power consumption and
user needs, a 90% or 80% capacity ratio can be selected.
Energy consumption analysis and solution
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