AUX E Series, Руководство по обслуживанию

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AUX air conditioner service manual
177
There is only one cylinder installed in the Single-stage rotary Vacuum pump. Inside the cylinder, the
rotor is eccentrically mounted inside the cylinder. There are two rotary blades fixed inside the rotor
groove, and two of them are oppressed tightly to the surface of the cylinder by the central spring force
and the centrifugal force produced in the process of rotation. The tangents created by the two rotary
blades to the rotor and cyclones divide the crescent space between the cylinder and rotor into three (or
two) parts. The space connects with the air intake is called air absorbing space; the spaced connects
with the air vent is called air exhausting space; the space between two rotary blades is called air
compressing space. When the rotor is rotated, the air absorbing space formed by the two tangents
between the right side rotary blade to the rotor and cylinder is continuously expanding, and the air
exists in the object system is sucked and filling in the space. When the left side rotary blade arrives at
the very position that can seal the orifice of the air absorbing channel, the air absorbing process is
ended and the volume of the absorbed air reach the maximum value. Along with the continuous
rotation of the rotor, the air exists between the two rotary blades is compressed, and its pressure is
consequently increased step by step. After the former right side rotary blade arrives at the orifice
connecting with the exhaust channel, and when the air pressure exists in the compression space is over
one standard atmosphere pressure value, the air will burst through the exhaust valve and vent. Two of
the rotary blades work together by turn. The rotor completes the air-absorbing and air-exhausting
process twice in every rotation circle. The exhaust valve is soaked in the oil in case of the atmosphere
enters into the pump.
The utmost pressure the single-stage vacuum pump can tolerate is 5Pa, and the utmost pressure the
double lever rotary vacuum pump can tolerate is 0.01Pa.
The attention proceeding during the application of the vacuum pump: The location site for the vacuum
pump shall be dry, ventilated and clean. The blow-off proof hose connects with the refrigerating
system and vacuum shall be short and without bend. Before starting the vacuum pump, check the
joints and the welding joints carefully to ensure there are no defects available, and confirm whether the
rubber plug to the air vent is off or not. Before turning off the vacuum pump, switch off the
Throughway valve firstly for separating the refrigerating system and the vacuum. When the vacuum
leaves unused, block the air intake and air vent by the rubber plug in case of the entry of the dust and
ordure to the pump body, which may affect the precision of the interior cavity. It’s necessary to
maintain the neatness of the vacuum pump, check the volume of the lubricating oil through the oil
window frequently, and enforce the daily maintenance applied to the vacuum pump for enhancing the
equipments’ perfectness ratio.
2. Pressure gauge
Due to the usual refrigerant leakage to the air-conditioner, the pressure gauge applied for the fullness
inspection to the refrigerant in the system is often in need. The pressure gauge is the usual inspection
tool for the refrigerant cooling system. It is in various specifications with the outer diameter from
60mm
～
250mm. The applicable measurement range of the vacuum pressure gauge to the
air-conditioner refrigerating system is
－
0.1MPa
～
2.5Mpa, which is indicated in the Picture 2-33.
The pressure gauge usually matches with the three-way mend valve in application. The rotation
applied to the knob of the three-way mend valve in clockwise direction may reduce the size of the
valve bore. When the knob reaches the bottom of the rotation, the connection between the
corresponding tubing and the gas path of the outdoor unit will be cut off; The rotation applied to the