Working Principle Diagram - Gree KF-70DW/NA1 Technical & Service Manual

Table of Contents

Working principle diagram

５．１　

Cooling system diagram for cooling only type

Evaporator

When the power is on, indoor and outdoor units will start to run. The compressor sucks low-pressure refrigerant gas from the evaporator of indoor unit and

then discharges high-temperature, high-pressure refrigerant gas into outdoor condenser. Then air exchanges the heat with outdoor air and becomes refrigerant

liquid. The liquid is throttled by the capillary and changes into low-temperature and low-pressure liquid and then flows into indoor evaporator. Then liquid exchanges

the heat with the required air and changes into low-temperature and low-pressure refrigerant gas. the cycle introduced above goes on and on, and the demanded low

temperature environment is maintained.

５．２　

Cooling system diagram for cooling/heating type

Evaporator

Heating

Cooling

When the power is on, indoor and outdoor units will start to run. When the system operates in cool mode, the compressor sucks low-temperature, low-

pressure refrigerant gas from indoor evaporator and then discharges high-temperature, high-pressure refrigerant gas into outdoor heat exchanger. With the

help of axial flow fan, the gas transfers its latent heat into outdoor air and becomes high-pressure refrigerant liquid. The liquid is throttled by the capillary

and changes into low-temperature and low-pressure liquid and then flows into indoor heat exchanger. With the help of centrifugal fan, the liquid evaporates

into low-temperature refrigerant gas and indoor air is cooled down. The refrigerant gas is sucked into the compressor and the cycle introduced above goes

on and on, and the demanded low temperature environment is maintained.

When the system operates in heat mode, 4-way valve changes its way and the refrigerant flows in the reversible cycle as the cool mode. The refrigerant

discharges its latent heat in the indoor heat exchanger, and sucks heat from outdoor heat exchanger and forms the heat pump cycle. This cycle goes on and

on, and the demanded high temperature environment is maintained.

Cross flow fan

Gas-liquid separator

One-way valve

Cross flow fan

Auxillary capillary

electromagnetic

4-way valve

Gas-liquid separator

Filter

Capillary

Axial flow fan