Service manual

AUX air conditioner service manual
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To the air-conditioner with a large evaporating surface area, usually, the coil pipes of the evaporator
are ranked together side by side. For enhancing the evaporation efficiency, the liquid distributor is in
need to be assembled for having the refrigerant enter into the evaporator equably in various routes.
The liquid distributor of the air-conditioner generally consists of a coniform unit body and a throttling
nozzle. The refrigerant enters inside through the nozzle and to be guided in different ways following
the inner surface of the cone. There are many equally distributed holes at the bottom of the cone,
which are connected to the various accesses of the evaporator through the capillary tubes. When the
refrigerant flows through the nozzle of the throttling liquid distributor, its flow speed will be
accelerated due to the sudden contraction to the section area of the stream, and force the liquid and gas
mix together equally to flow into the capillary tubes which connect to the throttling ring. Consequently,
the flows will enter inside the various tubes of the evaporator so as to enhance the evaporating
efficiency for the evaporator. Refer to the below picture 2-7 of the figure of liquor separator.
⑺The stop valve
For controlling the braking of the refrigerant existing in the pipes of the refrigeration system, and
switching its flowing direction for the purpose of switching the heating and refrigerating function of
the air-conditioner as well as easy service operation, there are various types stop valve units are
amounted in the pipelines of the air-conditioner’s refrigeration system. The most important includes
the electromagnetic reversing valve, single direction valve and cut-off valve etc.
①the electromagnetic reversing valve it’s mainly applied in the heat pump air-conditioner. Since there
are four main pipelines connect to it regarding to the structure, it is usually called four-way valve. It is
used to changes the function of the condenser and evaporator and realize the shift between the
air-conditioner’s functions of refrigerating, heating or defrosting etc. through the way of changing the
direction of the flow of the refrigerant in the system. Refer to the below picture 2-8 for the figure of
the electromagnetic reversing valve.