Displacement control valve of clutchless variable displacement inclined plate-type compressor
A clutchless, capacity control technology, applied in the direction of liquid variable displacement machinery, machine/engine, mechanical equipment, etc., can solve the problems of large-scale electromagnetic solenoid, large electromagnetic force, etc.
Inactive Publication Date: 2009-07-01
SANDEN CORP
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AI Technical Summary
Problems solved by technology
In order to force the valve core to open in the area of high discharge pressure, a valve opening spring with relatively large elastic force must be used. In order to excite the electromagnetic solenoid to overcome the elastic force of the valve opening spring and attract the movable iron core, a large The electromagnetic force will increase the size of the electromagnetic solenoid
Method used
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Embodiment Construction
[0021] Next, with reference to the drawings, a description will be given of a preferred embodiment of the displacement control valve of the clutchless variable displacement swash plate compressor of the present invention.
[0022] figure 1 , figure 2 This shows a variable displacement swash plate compressor with a displacement control valve according to an embodiment of the present invention. Such as figure 1 As shown, the variable displacement type swash plate compressor 1 has a main shaft 10, a rotor 11 fixed to the main shaft 10, and a swash plate 12 supported on the main shaft 10 with a variable inclination angle. The swash plate 12 is connected to the rotor 11 by a link mechanism that allows the inclination angle of the swash plate 12 to change, and rotates synchronously with the rotor 11 and the main shaft 10. The piston 15 is engaged with the swash plate 12 by a pair of shoes 14 sliding in contact with the outer peripheral edge of the swash plate 12. The piston 15 is in...
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A capacity control valve for a clutchless variable capacity swash plate compressor, which opens and closes a passage between a discharge chamber and a crank chamber to control the discharge capacity of the compressor. The valve hole (106) communicating with the discharge chamber; the internal control valve that opens and closes the valve hole (106) by the valve core (112) that moves according to the expansion and contraction of the pressure-sensitive member (109) that senses the suction pressure (100); and being connected to the internal control valve, switching the internal control valve to an action state in which the valve core opens and closes the valve hole corresponding to the expansion and contraction of the pressure-sensitive member or independently of the expansion and contraction of the pressure-sensitive member An action switching device (120) for causing the valve core to enter a non-operating state of opening the valve hole. In the capacity control valve of the present invention, the discharge pressure Pd acts on the valve core (112) and the pressure sensing rod (110), so the force exerted by the discharge pressure Pd on the valve core (112) in the valve closing direction becomes (Sr-Sv) Pd. (Sr-Sv) is minute, so the capacity control valve (2) can be smaller than the conventional capacity control valve.
Description
Technical field [0001] The present invention relates to a displacement control valve of a clutchless variable displacement swash plate type compressor directly connected to a driving source without a clutch. Background technique [0002] Patent Document 1 discloses a clutchless opening and closing capacity swash plate compressor that opens and closes a valve hole formed in a passage between the discharge chamber and the crank chamber of a variable capacity swash plate compressor to control the discharge capacity of the compressor. Displacement control valve, that is, the displacement control valve has: a valve hole that always communicates with the crank chamber; an internal control valve that opens and closes the valve hole by a spool that is actuated by the expansion and contraction of a pressure-sensitive member that senses suction pressure ; Connect with the internal control valve, switch the internal control valve to an operating state in which the valve core opens and close...
Claims
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IPC IPC(8): F04B27/18
CPCF04B2027/1854F04B2027/1881F04B2027/1813F04B2027/1827F04B2027/1859F04B27/1804
Inventor 田口幸彦
Owner SANDEN CORP