Slide holding device of rotary compressor and control method thereof

Abstract

The invention relates to relates to a sliding vane holding device of a rotary compressor and a controlling method thereof; a motor and a compressing component connected with the motor are arranged in a sealed shell in which the pressure is a high-pressure side; the compressing component comprises two cylinders, and an intermediate baffle is arranged between the cylinders; each cylinder are held in a cylinder cavity of a circular piston which can carry out a free eccentric rotation; the sliding of a sliding vane is set in a sliding vane groove; the rear end part of the sliding vane is held in a sliding vane cavity; the sliding vane is pressed, and the front end of the sliding vane is in contact with and closely follows with the outer diameter of the circular piston, wherein, a first sliding cavity is provided with a spring connected with the sliding vane. The sliding vane holding device is characterized in that a cross hole is arranged on a second cylinder; one end of the cross hole isat the high-pressure side, and the other end of the cross hole is at the sliding groove of the second cylinder; a first concave part with a diameter more than the diameter of the cross hole is arranged on the lateral motion surface of a second sliding vane corresponding to the cross hole; a second sliding vane cavity is communicated with one end of a pressure switching pipe, and the other end of the pressure switching pipe stretches out of the shell and is communicated with a pressure switching valve.

Description

Technical field [0001] The invention relates to a rotary compressor, in particular to a sliding vane holding device of the rotary compressor and a control method thereof. Background technique [0002] In recent years, as two-cylinder rotary compressors have been applied to air conditioners, as one example, a method for stopping the compression of the cylinders to control the cooling capacity of the compressor has been disclosed. As a representative example of these cold capacity control technologies, the internal pressure of the closed sliding vane cavity or the pressure of the cylinder compression cavity is switched between low pressure and high pressure, and the sliding vane is moved away from the piston direction through the retaining device to keep the sliding vane in the direction of the piston. The inside of the sliding vane cavity and the method of releasing the hold to suspend and release the compression of the cylinder cavity have been disclosed. For example, Japanese P...

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Problems solved by technology

Such as Japanese patent: patent publication No. 1-247786, i.e. patent document 1, and patent publication No. 2004-301114 communique, i.e. the design problem that occurs when the slide plate is kept away from the piston disclosed in patent document 2. It is difficult to equip large devices such as magnets or tension springs in the cavity, and when the compression of the cylinder cavity stops and the moment the suspension is released, the slide will have unstable vibration problems; especially the unstable vibration of the slide will bring The following reliability problems: slide beating sound caused by the collision between the front end of the slide and the outer circumference of the piston, and the resulting damage to the slide

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