JPH036088U

JPH036088U -

Info

Publication number: JPH036088U
Application number: JP6537789U
Authority: JP
Priority date: 1989-06-06
Filing date: 1989-06-06
Publication date: 1991-01-22

Description

[Brief explanation of the drawing]

第１図は第１の考案の一実施例としての可変容
量ベーン型圧縮機の全体断面図、第２図は同回転
圧縮機の連通路、ピストン及びアジヤストプレー
トの連結状態を示す説明図、第３図は第２の考案
の実施例を示す第２図と同じ説明図、第４図は従
来の可変容量ベーン型回転圧縮機の要部断面図で
ある。２０……ピストン、２７……ベーン、３９……
吐出室、４６……パイロツト圧路、５０……ベロ
ーズ室、５２……ボール弁（切換弁）、５５……
プランジヤ、５３……連通路、ａ……絞り部、６
０……チエツク弁、６１……ベーン背圧室、６２
……ベーン背圧通路。 FIG. 1 is an overall sectional view of a variable capacity vane type compressor as an embodiment of the first invention, and FIG. 2 is an explanatory diagram showing the connection state of the communication passage, piston, and adjuster plate of the rotary compressor. FIG. 3 is the same explanatory view as FIG. 2 showing an embodiment of the second invention, and FIG. 4 is a sectional view of the main part of a conventional variable capacity vane type rotary compressor. 20... Piston, 27... Vane, 39...
Discharge chamber, 46... Pilot pressure path, 50... Bellows chamber, 52... Ball valve (switching valve), 55...
Plunger, 53... Communication path, a... Restricted portion, 6
0... Check valve, 61... Vane back pressure chamber, 62
...Vane back pressure passage.

Claims

[Claims for Utility Model Registration] (1) A piston that operates to vary the discharge amount of the compressor, a communicating passage in which a pilot pressure passage is opened to guide pilot pressure to the piston, and one end of this communicating passage. a switching valve that selectively guides the suction pressure in the bellows chamber at the side and the discharge pressure in the discharge chamber at the other end of the communication path to the pilot pressure path; The vane back pressure passage is provided with a plunger forming a throttle portion, a check valve is provided at the other end of the communication passage, and a vane back pressure passage through which vane back pressure is conducted is opened in the communication passage between the check valve and the switching valve. A variable capacity vane type rotary compressor. (2) A piston that operates to vary the discharge amount of the compressor, a communication passage in which a pilot pressure passage that leads pilot pressure to the piston side is open, and a suction pressure and a bellows chamber at one end of this communication passage. The valve includes a switching valve that selectively guides the discharge pressure of the discharge chamber at the other end of the communication passage to a pilot pressure passage, and a plunger that is housed in the communication passage and forms a constricted portion between the communication passage and the inner wall of the communication passage. A variable capacity vane type rotary compressor, characterized in that the plunger is formed of a material having a higher coefficient of thermal expansion than the compressor body housing the plunger.