Device for changing displacement of slide vane compressor

[0010] Fig. 1 and Fig. 2 respectively show a structural cross-sectional schematic diagram and a schematic working principle schematic diagram of a variable displacement device of a compressor according to the present invention. This embodiment adopts the structural scheme of double working chambers. The compressor includes a rotor 1, a cylinder body 2, a sliding vane 3, a front end cover 4 and a rear end cover 5; the two ends of the rotor 1 are made into journals 6a and 6b, respectively supported on On the front end cover 4 and the rear end cover 5, the front end cover 4 and the rear end cover 5 are directly or indirectly fixedly connected to the cylinder body 2; a chute 7 is provided along the radial direction of the rotor 1, more generally, The chute 7 is offset along the direction parallel to the axis of the rotor 1 (not shown in the figure); the flat sliding piece 3 is fitted in the chute 7 and slidably fit with it, the sliding piece 3 and the The quantity of the chute 7 is f