Coolant gas guiding mechanism in compressor

A coolant gas guiding mechanism in a compressor, for compressing and discharging the coolant gas supplied from an external coolant circuit, said mechanism comprising;

• a casing;
• a rotary shaft disposed in said casing;
• a plurality of cylinder bores disposed around said rotary shaft;
• a plurality of pistons mounted for reciprocating movement within the respective of said cylinder bores, each said piston moving between a lower dead point and an upper dead point within its said associated cylinder;
• a working chamber defined by each piston in its corresponding cylinder bore;
• a rotary valve disposed coaxially and connected for rotation with the rotary shaft and having a hollow central suction chamber and an inlet through which the coolant gas is introduced into said control suction chamber from an external coolant circuit, the cross-sectional area of said suction chamber being larger than the cross-sectional area of said inlet, and an outlet for sequentially communicating with a selected plurality, but fewer than all of said working chambers in synchrony with the reciprocating movements of said pistons for supplying the coolant gas to the working chambers;
• and
• a plurality of suction ports each connecting said suction chamber and said plurality of working chambers when the pistons in said plurality of working chambers are moving toward their said lower dead points, and said rotary valve sequentially disconnecting said suction chamber from each of said working chambers when said piston in the working chamber is moving toward its said upper dead point.

A coolant gas guiding mechanism in a compressor, for compressing and discharging the coolant gas supplied from an external coolant circuit, said mechanism comprising;

• a casing;
• a rotary shaft disposed in said casing;
• a plurality of cylinder bores disposed around said rotary shaft;
• a plurality of pistons mounted for reciprocating movement within the respective of said cylinder bores;
• a wobble plate connected to said pistons, for causing said pistons to reciprocate in accordance with the rotation of said rotary shaft;
• a working chamber defined by each piston in its corresponding cylinder bore;
• a rotary valve disposed coaxially and connected for rotation with the rotary shaft for causing the coolant gas to be sucked into the casing from an external coolant circuit, said rotary valve communicating with a plurality, but fewer than all of said working chambers in synchrony with the reciprocating movements of said pistons for supplying coolant gas to each working chamber, said rotary valve being cylindrical and including a suction chamber therein, an inlet through which the coolant gas is sucked into said suction chamber from the external coolant circuit, the cross sectional area of said suction chamber being larger than the cross-sectional area of said inlet, and an outlet communicating with a selected plurality, but fewer than all of said working chambers, in accordance with the rotation of the rotary shaft;
• and
• a plurality of suction ports, each port connecting said suction chamber to one of said working chambers when the inner pressure of the working chamber is being lowered, and said rotary valve disconnecting said suction chamber from said working chamber when the inner pressure of the working chamber is being increased.