JPH048791U

JPH048791U -

Info

Publication number: JPH048791U
Application number: JP4957090U
Authority: JP
Priority date: 1990-05-11
Filing date: 1990-05-11
Publication date: 1992-01-27

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の容量可変装置を
示す破断面図、第２図はその容量可変装置を備え
た可変容量型ベーン型圧縮機を示す縦断面図、第
３図は容量可変装置の開弁状態を示す概略断面図
、第４図は第２図の−線に沿う断面図で、制
御部材が全稼動位置にあるときの図、第５図は第
４図と同様の図で、制御部材が一部稼動位置にあ
るときの図、第６図は第２図の−線に沿う断
面図、第７図及び第１２図はクールダウン特性を
示すグラフ、第８図及び第９図はこの考案の他の
実施例を示す図、第１０図は従来の可変容量型ベ
ーン型圧縮機の容量可変装置を示す破断面図、第
１１図は従来の可変容量型ベーン型圧縮機の容量
可変装置を示す概略断面図である。１１……吸入室、２３_２……高圧室、３１，３
１ａ，３１ｂ，３１ｃ……連通路（第１の連通路
）、３２……容量可変装置、３２ａ……ベローズ
、３２ｂ……ボール弁体（弁体）、３２ｃ……ば
ね、３２ｅ……プランジヤ、３２ｆ……ロツド、
３４……貫通孔、３５……ケース、３９……連通
路（第２の連通路）、４０……可動仕切板、４１
……駆動装置（駆動手段）、４２……通路断面積
制御装置（通路断面積制御手段）。 Fig. 1 is a broken sectional view showing a variable capacity device according to an embodiment of this invention, Fig. 2 is a longitudinal sectional view showing a variable capacity vane type compressor equipped with the variable capacity device, and Fig. 3 is a variable capacity variable A schematic cross-sectional view showing the valve open state of the device, FIG. 4 is a cross-sectional view taken along the - line in FIG. 2, when the control member is in the fully operating position, and FIG. 5 is a view similar to FIG. 4. FIG. 6 is a sectional view taken along the - line in FIG. 2, FIGS. 7 and 12 are graphs showing the cool-down characteristics, and FIGS. Fig. 9 is a diagram showing another embodiment of this invention, Fig. 10 is a broken cross-sectional view showing a variable capacity device of a conventional variable displacement vane type compressor, and Fig. 11 is a conventional variable displacement vane type compressor. FIG. 2 is a schematic cross-sectional view showing a variable capacity device. 11...Suction chamber, 23 ₂ ...High pressure chamber, 31,3
1a, 31b, 31c... Communication path (first communication path), 32... Capacity variable device, 32a... Bellows, 32b... Ball valve body (valve body), 32c... Spring, 32e... Plunger, 32f... Rod,
34...Through hole, 35...Case, 39...Communication path (second communication path), 40...Movable partition plate, 41
... Drive device (driving means), 42 ... Passage cross-sectional area control device (passage cross-sectional area control means).

Claims

[Scope of utility model registration request]

A valve body that opens and closes a first communication path leading from a high pressure chamber into which discharge pressure is introduced to a bellows chamber, a spring that biases this valve body in the valve closing direction, and a pressure between the discharge pressure and the pressure inside the high pressure chamber. a plunger that pushes the valve body in the valve closing direction when the pressure difference exceeds a predetermined value; and a plunger that expands and contracts in response to pressure changes in the bellows chamber and is accommodated in the bellows chamber and whose pressure drops below a predetermined value. A variable capacity device for a variable capacity compressor comprising a bellows that is expanded when the valve body is pushed in a valve opening direction, and a second communication path that communicates the bellows chamber with a suction chamber into which refrigerant is sucked; a movable partition plate that increases or decreases the cross-sectional area of the passage, a drive means that drives the movable partition plate, and a passage cross-sectional area control means that drives the drive means to reduce the cross-sectional area of the passage when the detected temperature is equal to or higher than a predetermined value. A variable capacity device for a variable capacity compressor, comprising: