Lennox TSA024S4N41M, Руководство пользователя, Страница: 7 / 28

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DISCHARGE
SUCTION
Figure 3. Scroll Compressor
STATIONARY SCROLL
ORBITING SCROLL
DISCHARGE
SUCTION
TIPS SEALED BY
DISCHARGE PRESSURE
DISCHARGE
PRESSURE
Figure 4. Scroll Cross−Section
The counterclockwise orbiting scroll draws gas into the outer
crescent shaped gas pocket created by the two scrolls as
illustrated in Figure 5, detail A. The centrifugal action of the
orbiting scroll seals off the flanks of the scrolls as illustrate din
Figure 5, detail B. As the orbiting motion continues, the gas is
forced toward the center of the scroll and the gas pocket
becomes compressed as illustrated in Figure 5, detail C.
When the compressed gas reaches the center, it is
discharged vertically into a chamber and discharge port in the
top of the compressor as illustrate in Figure 4. The discharge
pressure forcing down on the top scroll helps seal off the
upper and lower edges (tips) of the scrolls as illustrated in
Figure 4. During a single orbit, several pockets of gas are
compressed simultaneously providing smooth continuous
compression.
The scroll compressor is tolerant to the effects of liquid
return. If liquid enters the scrolls, the orbiting scroll is allowed
to separate from the stationary scroll. The liquid is worked
toward the center of the scroll and is discharged. If the
compressor is replaced, conventional Lennox cleanup
practices must be used.
Due to its efficiency, the scroll compressor is capable of
drawing a much deeper vacuum than reciprocating
compressors. Deep vacuum operation can cause
internal fusite arcing resulting in damaged internal parts
and will result in compressor failure. Never use a scroll
compressor for evacuating or to pump system into a
vacuum. This type of damage can be detected and will
result in denial of warranty claims.
The scroll compressor is quieter than a reciprocating
compressor, however, the two compressors have much
different sound characteristics. The sounds made by a scroll
compressor do not affect system reliability, performance, or
indicate damage.
See compressor nameplate or ELECTRICAL DATA for
compressor specifications.
DETAIL A
SUCTION
POCKET
SUCTION
ORBITING SCROLL
STATIONARY SCROLL
SUCTION
SUCTION
DISCHARGE
POCKET
SUCTION
INTERMEDIATE PRESSURE
GAS
CRESCENT
SHAPED
GAS POCKET
HIGH PRESSURE GAS
FLANKS SEALED
BY CENTRIFUGAL
FORCE
MOVEMENT OF ORBIT
DETAIL B
DETAIL C DETAIL D
Figure 5. Scroll Compressors