JPH0437890U

JPH0437890U -

Info

Publication number: JPH0437890U
Application number: JP7840690U
Authority: JP
Priority date: 1990-07-24
Filing date: 1990-07-24
Publication date: 1992-03-31

Description

[Brief explanation of drawings]

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１０図はクールダウン特性を
示すグラフ、第８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９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……高圧作動室、３１
，３１ａ，３１ｂ，３１ｃ……連通路、３２……
容量可変装置、３２ａ……ベローズ、３２ａ_１…
…ベローズの自由端、３２ａ_２……ベローズの固
定端、３２ｂ……ボール弁体（弁体）、３２ｃ…
…ばね、３２ｅ……プランジヤ、３２ｆ……ロツ
ド、３２ｇ……電磁コイル、３２ｈ……コイルホ
ルダ、３３，３３ａ，３３ｂ……高圧導入路、３
４……貫通孔、３５……ケース、４０……コント
ロールユニツト（通電制御手段）。 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. 6 is a sectional view taken along the - line in FIG. 2, FIGS. 7 and 10 are graphs showing the cool-down characteristics, and FIG. 8 is a conventional FIG. 9 is a schematic sectional view showing a variable capacity device of a conventional variable capacity vane compressor. 11... Suction chamber, 23 ₂ ... High pressure working chamber, 31
, 31a, 31b, 31c... communication path, 32...
Capacity variable device, 32a... bellows, 32a ₁ ...
...Free end of the bellows, 32a ₂ ...Fixed end of the bellows, 32b...Ball valve body (valve body), 32c...
... Spring, 32e ... Plunger, 32f ... Rod, 32g ... Electromagnetic coil, 32h ... Coil holder, 33, 33a, 33b ... High voltage introduction path, 3
4...Through hole, 35...Case, 40...Control unit (energization control means).

Claims

[Scope of utility model registration request]

A valve body that opens and closes a communication path leading from a high-pressure working chamber into which discharge pressure is introduced to a suction 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 working chamber. a plunger that pushes the valve body in the valve closing direction when the difference exceeds a predetermined value; and a plunger that expands and contracts in response to pressure changes in the suction chamber and expands when the pressure in the suction chamber falls below a predetermined value. A variable displacement device for a variable displacement compressor, which includes a bellows and a magnetic rod fixed to the free end of the bellows and which pushes the valve body in the valve opening direction when the bellows is expanded, generates magnetic flux when energized. comprising an electromagnetic coil that moves the rod toward the fixed end of the bellows, and energization control means that energizes the electromagnetic coil when a detected temperature is equal to or higher than a predetermined value, the electromagnetic coil being fixed to the fixed end of the bellows within the bellows; A variable displacement device for a variable displacement compressor, characterized in that one end of the rod protrudes into the bellows, and one end of the rod is loosely inserted into the electromagnetic coil.