JPS6456595U

JPS6456595U -

Info

Publication number: JPS6456595U
Application number: JP15241487U
Authority: JP
Priority date: 1987-10-05
Filing date: 1987-10-05
Publication date: 1989-04-07

Description

[Brief explanation of drawings]

第１図は本考案の液圧縮防止用逆止弁の第１実
施例の概要を示す断面図である。第２図は同じく
第２実施例の概要を示す断面図である。第３図は
第２図の実施例の変形例の概要を示す断面図であ
る。第４図は本考案が適用される液圧縮防止用逆
止弁をもつたベーン形回転圧縮機の縦断面図であ
る。第５図は従来の液圧縮防止用逆止弁の概要を
示す断面図である。第６図は第５図の弁の開弁時
の状態を示す断面図である。１……円筒形ハウジング、２，３……サイドプ
レート、５……ロータ、７……圧縮室、８……貯
油室、９……連通孔、１０……液圧縮防止用逆止
弁、１１……弁座、１２……弁体、１３……スプ
リング、１４……リテーナ、１７……リテーナ保
持部材、１８……凹所、１９……フランジ、２０
，２１……逃し通路。 FIG. 1 is a sectional view showing an outline of a first embodiment of the check valve for preventing liquid compression of the present invention. FIG. 2 is a sectional view showing an outline of the second embodiment. FIG. 3 is a sectional view schematically showing a modification of the embodiment shown in FIG. 2. FIG. FIG. 4 is a longitudinal sectional view of a vane-type rotary compressor having a check valve for preventing liquid compression to which the present invention is applied. FIG. 5 is a sectional view showing an outline of a conventional check valve for preventing liquid compression. FIG. 6 is a sectional view showing the state of the valve of FIG. 5 when it is open. DESCRIPTION OF SYMBOLS 1... Cylindrical housing, 2, 3... Side plate, 5... Rotor, 7... Compression chamber, 8... Oil storage chamber, 9... Communication hole, 10... Check valve for preventing liquid compression, 11 ... Valve seat, 12 ... Valve body, 13 ... Spring, 14 ... Retainer, 17 ... Retainer holding member, 18 ... Recess, 19 ... Flange, 20
, 21... Escape passage.

Claims

[Claims for Utility Model Registration] (1) A cylindrical housing, a side plate that closes both ends of the housing, and a compressor that is sandwiched between the side plates and rotates within the housing to expand and contract within the housing. and a rotor forming a chamber, the side plate is configured to communicate the compression chamber with an oil storage chamber provided on the outside of one of the side plates when the pressure in the compression chamber rises above a set value. A check valve for preventing liquid compression that opens and closes the communication hole provided in the plate.
a valve seat formed at an end of the communication hole on the oil storage chamber side;
a valve body that moves toward and away from the valve seat; a spring that biases the valve body against the valve seat with a predetermined elastic force; a retainer that receives a rear end of the spring; and a retainer that holds the retainer in a loosely fitted state. A check valve for preventing liquid compression in a rotary compressor, which has a retainer holding member formed with a recess, characterized in that the check valve is provided with means for suppressing movement of the retainer due to jet flow when the valve is opened. non-return valve. (2) The liquid according to claim 1, wherein the means for suppressing the movement of the retainer comprises a flange integrally formed with the retainer so as to cover the open end of the recess. Check valve to prevent compression. (3) Liquid compression prevention according to claim 1, wherein the means for suppressing the movement of the retainer comprises a relief passage passing through the center of the retainer from the rear end toward the front end. Check valve for use. (4) The utility model according to claim 1, wherein the means for suppressing the movement of the retainer comprises a relief passage passing through the retainer holding member and communicating the bottom of the recess with the oil storage chamber. Check valve to prevent liquid compression.