Variable displacement swash plate compressor

Abstract

The present invention addresses the problem of providing a variable displacement swash plate compressor having excellent rapidity in increasing capacity from a minimum capacity state. The variable displacement swash plate compressor includes a displacement control valve (13) that is configured to change crank chamber pressure (Pc), and an opening adjusting valve (61) that adjusts an amount of refrigerant sucked into a suction chamber (5a). The opening adjusting valve includes a valve case (63), a first valve element (65), a second valve element, and an urging spring. The valve case has a valveseat (75a) on which the second valve element (67) is seated. The valve seat regulates movement of the second valve element toward the first valve element. A sealing member (82) is provided between aninner peripheral surface of the valve case that defines a second valve chamber (71b) and an outer peripheral surface of the second valve element (67) to prevent refrigerant in the second valve chamber so that leakage between a bleed passage (52a) and a control passage (59) is prevented.

Description

technical field [0001] The present invention relates to variable capacity inclined plate compressors. Background technique [0002] Patent Document 1 discloses a conventional variable capacity swash plate compressor (hereinafter, simply referred to as a compressor). The compressor includes a housing, a swash plate, a plurality of pistons, a displacement control valve, and an opening adjustment valve. [0003] A suction chamber, a plurality of cylinder bores, a crank chamber, and a discharge chamber are formed in the housing. The swash plate is installed in the crank chamber, and the inclination angle is changed by the crank chamber pressure in the crank chamber. Each piston engages with the swash plate and is accommodated in the cylinder bore to form a compression chamber with the housing. The displacement control valve can change the crank chamber pressure. The opening adjustment valve adjusts the amount of refrigerant sucked into the suction chamber. [0004] The casi...

AI Technical Summary

Problems solved by technology

In addition, even if the second valve body is slightly separated from the valve housing by the high crank chamber pressure and the suction passage is slightly opened, since the refrigerant at the high crank chamber pressure flows to the second valve chamber at a large flow rate, the valve Negative pressure is generated between the casing and the second valve body, and the second valve body will also seat on the valve casing again

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