JPH0191086U - - Google Patents

Description

[Brief explanation of the drawing]

1 to 4 show an embodiment embodying the present invention, FIG. 1 is a side sectional view of a compressor and a capacity control valve mechanism, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. Figure 3 is a side sectional view showing a small capacity operating state, Figure 4 is a graph showing fluctuations in control pressure and discharge capacity, and Figures 5 to 7 are vertical cross sections showing the electromagnetic three-way valve used as the capacity control valve mechanism. It is a diagram. Cylinder block 1 constituting the housing, as well as front housing 2 and rear housing 3
, a rotating shaft 4, a swash plate 9, a double-ended piston 10, a control pressure chamber 20a, a sliding partition body 24 as a sliding control body,
A capacity control valve mechanism 29, an electromagnetic three-way valve 37 as a capacity control valve mechanism, a flow rate restricting member 36, and a swing center C.

Claims (1)

[Scope of utility model registration request] A swash plate chamber for introducing refrigerant gas, a pair of front and rear suction chambers, a pair of front and rear discharge chambers, and a plurality of cylinder bores forming a pair of front and rear connecting these chambers are defined in the housing, and a swash plate chamber and both front and rear suction chambers are formed. A rotary shaft is rotatably accommodated and supported in a housing which connects the two cylinders through a suction passage and accommodates a double-headed piston in both the front and rear cylinder bores so as to be able to move back and forth.
A swash plate is supported on this rotating shaft so that it cannot rotate relative to the rotating shaft but can swing back and forth around its peripheral edge.The center of this swing is set close to the rear cylinder bore, and the swash plate is supported as it rotates as the rotating shaft rotates. In a swash plate compressor, the reciprocating region of the double-headed piston is set above the rotational region of the center, and the top dead center of the compression stroke in the rear cylinder bore of the double-headed piston, which is reciprocated by the rotation of the swash plate, is the fixed position. In addition to providing a control pressure chamber for control, a sliding control body that changes the volume of this control pressure chamber is inserted, and the control pressure chamber and discharge pressure area are connected to introduce refrigerant gas equivalent to the discharge pressure. The pressure in the front cylinder bore and the pressure in the control pressure chamber are made to oppose each other through a plate and a sliding control body, and the control pressure chamber and the suction pressure area are connected, and a capacity control valve mechanism is interposed on this connection passage. A flow restricting member made of a porous material is provided on any of the connecting passages between the control pressure chamber and the discharge pressure region, between the control pressure chamber and the suction pressure region, and between the discharge pressure region and the suction pressure region. Variable capacity swash plate type compressor.