JPS63191285U

JPS63191285U -

Info

Publication number: JPS63191285U
Application number: JP8125687U
Authority: JP
Priority date: 1987-05-29
Filing date: 1987-05-29
Publication date: 1988-12-09

Description

[Brief explanation of the drawing]

第１図はこの考案および従来の可変容量型ベー
ン圧縮機を示す縦断面図、第２および第３図はそ
れぞれ第１図のＡ―Ａ線、Ｂ―Ｂ線に沿つての断
面図、第４図はこの考案によるチヤタリング防止
用バルブを示す部分断面図、第５図〜第８図は可
変容量型ベーンの作動状態を示すチヤタリング防
止用バルブと切換弁の部分拡大断面図、第９図は
この考案の第２の実施例を示す第５図〜第８図と
同様な図である。図中、２……シリンダ、３……フロントサイドプレー
ト、４……リヤサイドプレート、５……ロータ、
６……ベーン溝、７……ベーン、８……圧縮室、
１０……油分離室、１３……環状溝、１４……吸
入室、１５……回動板、４２ａ，４２ｂ……連通
路、４５，７０……切換弁、４９，４９′……チ
ヤタリング防止用バルブ、５５……弁スプール、
５６，５７……圧縮ばね、５８……連通路、５９
……ガス流通路、６０……ガス流通管。 Fig. 1 is a longitudinal sectional view showing this invention and a conventional variable displacement vane compressor, and Figs. 2 and 3 are sectional views taken along lines AA and BB in Fig. 1, respectively. Figure 4 is a partial cross-sectional view showing the chattering prevention valve according to this invention, Figures 5 to 8 are partial enlarged cross-sectional views of the chattering prevention valve and the switching valve showing the operating state of the variable displacement vane, and Figure 9 is a partial cross-sectional view showing the chattering prevention valve according to this invention. FIG. 8 is a diagram similar to FIGS. 5 to 8 showing a second embodiment of the invention. In the figure, 2...Cylinder, 3...Front side plate, 4...Rear side plate, 5...Rotor,
6... Vane groove, 7... Vane, 8... Compression chamber,
10... Oil separation chamber, 13... Annular groove, 14... Suction chamber, 15... Rotating plate, 42a, 42b... Communication passage, 45, 70... Switching valve, 49, 49'... Chattering prevention valve, 55...valve spool,
56, 57... Compression spring, 58... Communication path, 59
...Gas flow passage, 60...Gas flow pipe.

Claims

[Claims for Utility Model Registration] A rotor is rotatably supported inside a front side plate and a rear side plate fixed to both open ends of a cylinder housed in a housing.
A vane is slidably fitted into each of a plurality of vane grooves provided at equal intervals in the circumferential direction of the rotor, and hydraulic pressure is supplied from an oil separation chamber to the bottom of the vane groove through a communication path to drive the vane. The vane compressor is configured such that the refrigerant gas in the suction chamber is sucked into the compression chamber through the suction port and discharged into the discharge chamber through the discharge port by slidingly contacting the inner circumferential surface of the cylinder and rotating the rotor. In the variable capacity vane compressor, the discharge capacity is varied by controlling the suction amount and compression start timing of refrigerant gas supplied from the suction chamber to the compression chamber during the suction stroke, wherein the oil A gas flow passage is provided for supplying the discharge gas pressure in the separation chamber to the bottom of the vane groove, and the communication passage from the oil separation chamber and the gas flow passage are connected to a differential pressure between the discharge pressure and the suction pressure. Accordingly, a switching valve is provided to selectively communicate with the vane groove, and when the differential pressure becomes less than a required value, the gas flow passage and the vane groove are communicated with each other, thereby controlling the compression capacity and controlling the vane groove. A variable capacity vane compressor characterized by controlling taring with a single control valve.