AUX air conditioner service manual
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and air system etc., and each of them is composed of different parts. It’s necessary to know the
specific composition of the air-conditioner before learning it. In this case, we’d like to specify the
structure and performance of each parts of the air-conditioner as the following:
1. Refrigerating system parts
The main parts of the refrigerating system of the air-conditioner include: Compressor,
heat-exchanging unit (Condenser, evaporator), throttling unit (capillary tubes), brake & valve unit and
other auxiliary units. All of these units form a closed refrigerating cycle system after being connected
and jointed by copper pipes. The refrigerant stored inside the system complete the cooling and heating
cycle depending on the performance of the compressor.
The low-pressure refrigerant gas will be compressed by the compressor and turn into the high
temperature and pressure gas, and it will be cooled down and turn into the fluid again after passing
through the drying and filtering unit. Such fluid will flow through the capillary tubes and to be
throttled and cooled and finally inflood into the evaporator. Inside it, the fluid absorbs the quantity of
heat in the air and to be gasified. In this way, the indoor room air will be cooled down and to be
brought to the indoor room by the air-delivery system for further cooling down the indoor temperature,
then, the fluid refrigerant inside the evaporator will turn into gas again and will be absorbed by the
compressor repeatedly. Consequently by this way, the refrigerant keeps circulating between the units
of compressor-condenser-capillary tubes-evaporator continuously.
⑴Compressor
Compressor is the power core of the refrigerating cycle system in the air-conditioner. It realizes the
refrigeration purpose by the way of raising the temperature and pressure of the low temperature &
pressure refrigerant gas it absorbed after being compressed by the compressor and the consequent
conversion between the heat and power. In the air-conditioner, the structure of the compressor is
usually hermetic, and the electric motor, as the impulsion of the whole unit is airproofed inside a
container together with the compressor used for compressing the refrigerant, and the container is filled
with the lubricating oil as well as the corresponding lubricating agents mounted. The air compressors
of the air-conditioners are divided in three types: Reciprocating type, Rotary type and Scroll type.
①Reciprocating type
The Reciprocating type compressor mainly consists of cylinder, piston, crankshaft and connecting rod
agent. The crankshaft is powered and circumrotates by the electric motor, and push the piston to move
up and down inside the cylinder through the connecting rod. Once a cycle completed by the
compressor, the crankshaft will turn one round for undertaking the compressing, air discharge,
expansion and air absorbing process in turn. The compressor driven by the electric motor keeps
continuous running, and the piston runs repeatedly in the cylinder for finally realize the refrigerating
cycle. The practicality is as picture 2-1:
② Rotary type
The electric motor of the Rotary type compressor is on its top, and the compressor is at the bottom.
The whole cylinder almost soaked in the freezing oil completely. The rotor inside the cylinder rolls on
the surface of the cylinder wall with the guide of the eccentric shaft. There is a through groove on the
surface of the cylinder wall, which contains a slide. The slide cooperates with the rotor precisely in the
groove and contacts the outer surrounding surface of the rotor tightly with the impact of the spring so
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