Kubota B1830, Workshop Manual, Page: 488 / 548

CABIN B1830,B2230,B2530,B3030, WSM
10-M11
[1] COMPRESSOR
The compressor is installed on the engine and is driven by the crank pulley via a belt.
The compressor is a pump designed to raise the pressure of refrigerant. Raising the pressure means raising the
temperature. High temperature refrigerant vapor will condense rapidly in the condenser by releasing heat to the
surrounding.
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(1) Scroll Type Compressor
The scroll type compressor is composed of a pair of
swirl shaped fixed scroll (3) and movable scroll (2).
The fixed scroll (3) is fixed to the housing, and
movable scroll (2) rotates with the shaft (8). Therefore,
the capacity of the space partitioned with both scroll
changes. As a result, the refrigerant is inhaled and
compressed.
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Operation
When the capacity between fixed scroll (4) increases
with the rotational movement of the movable scroll (2),
the refrigerant is inhaled from the suction port (1). In
addition, the refrigerant is compressed by the rotational
movement of movable scroll (2).
When the refrigerant pressure rises, the discharge
valve is pushed open and the refrigerant gas is
discharged. In this way, the refrigerant gas is discharged
once in each rotation of the compressor shaft.
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(1) Bearing
(2) Movable Scroll
(3) Fixed Scroll
(4) Service Valve for High
Pressure
(5) Discharge Valve
(6) Discharge Port
(7) Bearing
(8) Shaft
(9) Shaft Seal
(1) Suction Port
(2) Movable Scroll
(3) Discharge Port
(4) Fixed Scroll A: Suction Stroke
B: Compression Stroke
C: Discharge Stroke
KiSC issued 05, 2012 A