JP2008223696A

JP2008223696A - Control valve and variable displacement compressor provided with control valve

Info

Publication number: JP2008223696A
Application number: JP2007065846A
Authority: JP
Inventors: Yukihiko Taguchi; 幸彦田口
Original assignee: Sanden Corp
Current assignee: Sanden Corp
Priority date: 2007-03-14
Filing date: 2007-03-14
Publication date: 2008-09-25
Anticipated expiration: 2027-03-14
Also published as: JP5025294B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure control valve providing the simplified structure of a movable member, suppressed noise, and suppressed wear of a component. <P>SOLUTION: This control valve is provided with: a pressure sensing chamber which is formed by a recessed part formed in a valve housing and a pressure sensing member covering the recessed part; a valve hole and a communication hole which are formed in the valve housing and communicate with the pressure sensing chamber; a valve seat which is formed around the valve hole in the pressure sensing chamber and approaches and is opposed to the pressure sensing chamber; and a pressing means which applies to the pressure sensing member, pressing force opposing pressing force applied to the pressure sensing member by pressure in the pressure sensing chamber. The pressure sensing member is displaced according to variations in pressure in the pressure sensing chamber, abuts/is separated on/from the valve seat to open/close the valve hole. Thereby, a fluid passage including the valve hole, the pressure sensing chamber, and the communication hole is controlled for opening/closing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、制御弁及び制御弁を備える可変容量圧縮機に関するものである。 The present invention relates to a control valve and a variable displacement compressor including the control valve.

バルブハウジングに形成された凹部と当該凹部を覆う感圧部材とにより形成された感圧室と、バルブハウジングに形成され感圧室に連通する弁孔と連通孔と、感圧室内で弁孔の周囲に形成された弁座と、弁座に対向して感圧室に配設され感圧部材に当接する弁体と、感圧室圧力が感圧部材に印加する付勢力に対向する付勢力を感圧部材に印加する付勢手段とを備え、感圧室圧力の変化に応じて感圧部材が変位し、感圧部材の変位に連動して弁体が移動し、弁座に当接、離間して弁孔を開閉することにより、弁孔と感圧室と連通孔とを含む流体通路を開閉制御する圧力制御弁が特許文献１に開示されている。
特許文献１の図２に示された制御弁においては、バネ２３４の付勢力を受けた弁体２３２が一方側からダイアフラム２３３に当接し、バネ２４０の付勢力を受けたストッパー２３９とロッド２３８とプランジャ２４１の連結体が他方側からダイアフラム２３３に当接して、一体の可動部材を形成している。ガイドリング２３５が弁体２３２を摺動可能に支持している。
特開平４−１８３９８０号公報 A pressure-sensitive chamber formed by a recess formed in the valve housing and a pressure-sensitive member covering the recess, a valve hole formed in the valve housing and communicating with the pressure-sensitive chamber, and a valve hole in the pressure-sensitive chamber. A valve seat formed in the periphery, a valve body that is disposed in the pressure-sensitive chamber so as to face the valve seat and contacts the pressure-sensitive member, and a biasing force that opposes the biasing force that the pressure-sensitive chamber pressure applies to the pressure-sensitive member And a biasing means for applying pressure to the pressure sensitive member, the pressure sensitive member is displaced in response to a change in the pressure sensitive chamber pressure, the valve body moves in conjunction with the displacement of the pressure sensitive member, and contacts the valve seat Patent Document 1 discloses a pressure control valve that controls opening and closing of a fluid passage including a valve hole, a pressure sensing chamber, and a communication hole by opening and closing the valve hole at a distance.
In the control valve shown in FIG. 2 of Patent Document 1, the valve body 232 that receives the biasing force of the spring 234 contacts the diaphragm 233 from one side, and the stopper 239 and the rod 238 that receive the biasing force of the spring 240. The connecting body of the plunger 241 contacts the diaphragm 233 from the other side to form an integral movable member. A guide ring 235 supports the valve body 232 in a slidable manner.
JP-A-4-183980

可動部材が複数の部品で構成されると、複数箇所で可動部材を支持する必要を生じ、摺動抵抗が増加して可動部材のスムーズな動きが阻害される。特に感圧室内に支持部材があると、支持部材と可動部材との間の隙間に流体中の微小異物が入り込み、可動部材の運動が妨げられる場合を生ずる。可動部材が複数の部品で構成されると、可動部材の重量が増加し、弁座やストッパーに当接する際の衝撃力が増加し、騒音や部品の磨耗の増大を招く。
本発明は上記問題に鑑みてなされたものであり、可動部材の構成が簡素化され、騒音や部品の磨耗が抑制された制御弁を提供することを目的とする。 When the movable member is composed of a plurality of parts, it is necessary to support the movable member at a plurality of locations, the sliding resistance is increased, and the smooth movement of the movable member is hindered. In particular, when there is a support member in the pressure-sensitive chamber, a minute foreign substance in the fluid may enter the gap between the support member and the movable member, and the movement of the movable member may be hindered. When the movable member is composed of a plurality of parts, the weight of the movable member increases, the impact force when contacting the valve seat and the stopper increases, and noise and wear of the parts increase.
The present invention has been made in view of the above problems, and an object thereof is to provide a control valve in which the configuration of the movable member is simplified and noise and wear of parts are suppressed.

上記課題を解決するために、本発明においては、バルブハウジングに形成された凹部と当該凹部を覆う感圧部材とにより形成された感圧室と、バルブハウジングに形成され感圧室に連通する弁孔と連通孔と、感圧室内で弁孔の周囲に形成され感圧部材に近接して対向する弁座と、感圧室圧力が感圧部材に印加する付勢力に対向する付勢力を感圧部材に印加する付勢手段とを備え、感圧室圧力の変化に応じて感圧部材が変位し、弁座に当接、離間して弁孔を開閉することにより、弁孔と感圧室と連通孔とを含む流体通路を開閉制御することを特徴とする制御弁を提供する。
本発明に係る制御弁においては、感圧部材が弁体を形成することにより可動部材の構成が簡素化されている。この結果、可動部材の摺動抵抗が減少して可動部材の動きがスムーズになり、可動部材の重量が減少して騒音や部品の磨耗が減少している。 In order to solve the above problems, in the present invention, a pressure-sensitive chamber formed by a recess formed in a valve housing and a pressure-sensitive member covering the recess, and a valve formed in the valve housing and communicating with the pressure-sensitive chamber A hole, a communicating hole, a valve seat formed around the valve hole in the pressure-sensitive chamber and facing the pressure-sensitive member, and a biasing force opposed to the biasing force applied to the pressure-sensitive member by the pressure-sensitive chamber pressure And a biasing means for applying pressure to the pressure member, and the pressure sensitive member is displaced according to a change in the pressure sensitive chamber pressure. Provided is a control valve that controls opening and closing of a fluid passage including a chamber and a communication hole.
In the control valve according to the present invention, the configuration of the movable member is simplified by the pressure-sensitive member forming the valve body. As a result, the sliding resistance of the movable member is reduced, the movement of the movable member is smoothed, the weight of the movable member is reduced, and noise and wear of parts are reduced.

本発明の好ましい態様においては、感圧部材は金属ダイアフラムである。
金属ダイアフラムは、薄板なので弁座への着座性が良好であり、閉弁時のシール性向上に寄与する。
本発明の好ましい態様においては、金属ダイアフラムは弁座よりも高硬度の材料で形成されている。
弁座よりも高硬度の材料で形成された金属ダイアフラムは、弁座との接離の繰り返しによる磨耗が抑制され、制御弁の信頼性向上に寄与する。
本発明の好ましい態様においては、弁座は金属ダイアフラムへ向けて感圧室内に突出している。
弁座が金属ダイアフラムへ向けて感圧室内に突出することにより、金属ダイアフラムの弁座への着座性が向上する。
本発明の好ましい態様においては、制御弁は、弁座と金属ダイアフラムとの間の隙間を調節する調節手段を備える。
弁座と金属ダイアフラムとの間の隙間を調節する調節手段を配設することは、金属ダイアフラムのストロークを調節して適正化することを可能にし、制御弁の信頼性向上に寄与する。
本発明の好ましい態様においては、付勢手段は介挿部材を介して金属ダイアフラムを弁座へ向けて付勢し、金属ダイアフラムの介挿部材との当接部は介挿部材に寄り添う形状に加圧成形されている。
金属ダイアフラムの介挿部材との当接部を介挿部材に寄り添う形状に成形することは、ダイアフラムと介挿部材との密着性を向上させ、ダイアフラムの弁座への着座性を向上させて、閉弁時のシール性向上に寄与する。
本発明の好ましい態様においては、付勢手段はソレノイドを有し、介挿部材は磁性材料から成るソレノイドの可動コア又は可動コアと連結したソレノイドロッドである。
付勢手段がソレノイドを有する場合、介挿部材を可動コア又は可動コアと連結したソレノイドロッドとして兼用することは、可動部材の構成を簡素化し、生産性の向上に寄与する。 In a preferred embodiment of the present invention, the pressure sensitive member is a metal diaphragm.
Since the metal diaphragm is a thin plate, the seating property on the valve seat is good and contributes to the improvement of the sealing performance when the valve is closed.
In a preferred embodiment of the present invention, the metal diaphragm is made of a material having a hardness higher than that of the valve seat.
The metal diaphragm formed of a material having a hardness higher than that of the valve seat suppresses wear due to repeated contact with and separation from the valve seat, and contributes to improving the reliability of the control valve.
In a preferred embodiment of the present invention, the valve seat protrudes into the pressure sensitive chamber toward the metal diaphragm.
Since the valve seat projects into the pressure sensitive chamber toward the metal diaphragm, the seating property of the metal diaphragm on the valve seat is improved.
In a preferred embodiment of the present invention, the control valve includes adjusting means for adjusting a gap between the valve seat and the metal diaphragm.
Providing the adjusting means for adjusting the gap between the valve seat and the metal diaphragm makes it possible to adjust and optimize the stroke of the metal diaphragm, and contributes to improving the reliability of the control valve.
In a preferred aspect of the present invention, the urging means urges the metal diaphragm toward the valve seat through the insertion member, and the contact portion of the metal diaphragm with the insertion member is added to a shape that leans against the insertion member. It is pressure formed.
Forming the contact portion of the metal diaphragm with the insertion member close to the insertion member improves the adhesion between the diaphragm and the insertion member, improves the seating property of the diaphragm on the valve seat, Contributes to improved sealing performance when the valve is closed.
In a preferred embodiment of the present invention, the urging means has a solenoid, and the insertion member is a solenoid core made of magnetic material or a solenoid rod connected to the movable core.
When the biasing means has a solenoid, using the insertion member as a movable core or a solenoid rod connected to the movable core simplifies the configuration of the movable member and contributes to improvement in productivity.

本発明の好ましい態様においては、制御弁は、感圧部材を間に挟んで感圧室に対向配置された第２感圧室と、感圧部材を除く第２感圧室囲壁に形成され第２感圧室に連通する第２連通孔とを備え、付勢手段は感圧室圧力と第２感圧室圧力との差圧が感圧部材に印加する付勢力に対向する付勢力を感圧部材に印加し、前記差圧の変化に応じて感圧部材が変位し、弁座に当接、離間して弁孔を開閉することにより、弁孔と感圧室と連通孔とを含む流体通路を開閉制御する。
感圧部材を間に挟んで第２感圧室を感圧室に対向配置し、感圧室圧力と第２感圧室圧力との差圧の変化に応じて感圧部材を変位させ、弁孔を開閉させても良い。この場合でも、感圧部材が弁体を形成することにより可動部材の構成が簡素化され、可動部材の摺動抵抗が減少して可動部材の動きがスムーズになり、可動部材の重量が減少して騒音や部品の磨耗が減少する。 In a preferred aspect of the present invention, the control valve is formed in a second pressure sensing chamber disposed opposite the pressure sensing chamber with the pressure sensing member interposed therebetween, and a second pressure sensing chamber surrounding wall excluding the pressure sensing member. And a second communication hole communicating with the pressure sensing chamber, and the biasing means senses a biasing force opposite to the biasing force applied to the pressure sensitive member by a differential pressure between the pressure sensing chamber pressure and the second pressure sensing chamber pressure. The pressure-sensitive member is applied to the pressure member, and the pressure-sensitive member is displaced according to the change in the differential pressure. The valve hole is opened and closed by contacting and separating from the valve seat, thereby including a valve hole, a pressure-sensitive chamber, and a communication hole. Open / close control of fluid passage.
A second pressure sensing chamber is disposed opposite the pressure sensing chamber with a pressure sensing member interposed therebetween, and the pressure sensing member is displaced in accordance with a change in pressure difference between the pressure sensing chamber pressure and the second pressure sensing chamber pressure, and the valve The hole may be opened and closed. Even in this case, since the pressure-sensitive member forms a valve body, the structure of the movable member is simplified, the sliding resistance of the movable member is reduced, the movement of the movable member is smoothed, and the weight of the movable member is reduced. This reduces noise and wear on parts.

本発明においては、傾角可変の斜板要素と斜板要素の回転に従動して往復動するピストンとを含む可変容量圧縮機であって、クランク室と吸入室との間の抽気通路と、当該抽気通路の途上に配設された、第２感圧室を備える制御弁を除く上記何れかの制御弁とを備え、弁孔はクランク室又は吸入室の一方に連通し、連通孔はクランク室又は吸入室の他方に連通し、クランク室圧力又は吸入室圧力の変化に応答して感圧部材が変位し、弁座に当接、離間して前記抽気通路を開閉制御することにより、クランク室圧力が可変制御され、ピストンストロークが可変制御されることを特徴とする可変容量圧縮機を提供する。
上記可変容量圧縮機においては、制御弁の作動によりクランク室圧力が調節され、斜板傾角が調節されて吐出容量が制御され、吸入室圧力又はクランク室圧力が所定値に制御される。上記可変容量圧縮機においては、制御弁がスムーズに作動して吐出容量制御がスムーズに行われ、制御弁作動時の騒音が減少し、制御弁の経時劣化が抑制される。
第２感圧室を備える制御弁を除く上記何れかの制御弁に、吐出室とクランク室との間の給気通路を開閉する第２の制御弁を付加し、第２感圧室を備える制御弁を除く上記何れかの制御弁による抽気通路の開閉と第２の制御弁による給気通路の開閉とを連動させて、クランク室圧力を調節しても良い。 In the present invention, a variable capacity compressor including a swash plate element having a variable tilt angle and a piston that reciprocates following the rotation of the swash plate element, the bleed passage between the crank chamber and the suction chamber, And any one of the above control valves except for the control valve having the second pressure sensing chamber, which is disposed in the middle of the bleed passage, the valve hole communicating with one of the crank chamber and the suction chamber, and the communication hole serving as the crank chamber Alternatively, the pressure chamber is communicated with the other of the suction chambers, and the pressure sensitive member is displaced in response to a change in the crank chamber pressure or the suction chamber pressure, and is brought into contact with and separated from the valve seat to control the opening and closing of the bleed passage. Provided is a variable capacity compressor characterized in that pressure is variably controlled and piston stroke is variably controlled.
In the variable capacity compressor, the crank chamber pressure is adjusted by the operation of the control valve, the swash plate tilt angle is adjusted to control the discharge capacity, and the suction chamber pressure or the crank chamber pressure is controlled to a predetermined value. In the variable displacement compressor, the control valve operates smoothly and discharge capacity control is performed smoothly, noise during operation of the control valve is reduced, and deterioration of the control valve over time is suppressed.
A second control valve that opens and closes an air supply passage between the discharge chamber and the crank chamber is added to any one of the above control valves except the control valve having the second pressure chamber, and the second pressure chamber is provided. The crank chamber pressure may be adjusted by interlocking the opening / closing of the bleed passage by any one of the control valves other than the control valve and the opening / closing of the supply passage by the second control valve.

本発明においては、傾角可変の斜板要素と斜板要素の回転に従動して往復動するピストンとを含む可変容量圧縮機であって、クランク室と吐出室との間の給気通路と、当該給気通路の途上に配設された、第２感圧室を備える上記制御弁とを備え、弁孔はクランク室に連通し、連通孔は吐出室に連通し、第２連通孔は吸入室又はクランク室又は吐出室よりも下流側の吐出通路に連通し、吐出室圧力と吸入室圧力との差圧、又は吐出室圧力とクランク室圧力との差圧、又は吐出室圧力と吐出通路圧力との差圧に応答して感圧部材が変位し、弁座に当接、離間して前記連通路を開閉制御することにより、クランク室圧力が可変制御され、ピストンストロークが可変制御されることを特徴とする可変容量圧縮機を提供する。
上記可変容量圧縮機においては、制御弁の作動によりクランク室圧力が調節され、斜板傾角が調節されて吐出容量が制御され、吐出室圧力と吸入室圧力との差圧、又は吐出室圧力とクランク室圧力との差圧、又は吐出室圧力と吐出通路圧力との差圧が所定値に制御される。上記可変容量圧縮機においては、制御弁がスムーズに作動して吐出容量制御がスムーズに行われ、制御弁作動時の騒音が減少し、制御弁の経時劣化が抑制される。 In the present invention, a variable capacity compressor including a swash plate element having a variable inclination angle and a piston that reciprocates following the rotation of the swash plate element, an air supply passage between the crank chamber and the discharge chamber, A control valve having a second pressure sensing chamber disposed in the air supply passage, the valve hole communicating with the crank chamber, the communication hole communicating with the discharge chamber, and the second communication hole serving as the suction port A pressure difference between the discharge chamber pressure and the suction chamber pressure, or a differential pressure between the discharge chamber pressure and the crank chamber pressure, or a discharge chamber pressure and a discharge passage. The pressure-sensitive member is displaced in response to the pressure difference from the pressure, and the crank chamber pressure is variably controlled and the piston stroke is variably controlled by controlling the opening and closing of the communication passage by contacting and separating from the valve seat. A variable capacity compressor is provided.
In the variable capacity compressor, the crank chamber pressure is adjusted by the operation of the control valve, the swash plate inclination angle is adjusted, the discharge capacity is controlled, and the differential pressure between the discharge chamber pressure and the suction chamber pressure, or the discharge chamber pressure The differential pressure between the crank chamber pressure or the differential pressure between the discharge chamber pressure and the discharge passage pressure is controlled to a predetermined value. In the variable displacement compressor, the control valve operates smoothly and discharge capacity control is performed smoothly, noise during operation of the control valve is reduced, and deterioration of the control valve over time is suppressed.

本発明に係る制御弁においては、感圧部材が弁体を形成することにより可動部材の構成が簡素化されている。この結果、可動部材の摺動抵抗が減少して可動部材の動きがスムーズになり、可動部材の重量が減少して騒音や部品の磨耗が減少している。
本発明に係る制御弁を備える可変容量圧縮機においては、制御弁がスムーズに作動して吐出容量制御がスムーズに行われ、制御弁作動時の騒音が減少し、制御弁の経時劣化が抑制される。 In the control valve according to the present invention, the configuration of the movable member is simplified by the pressure-sensitive member forming the valve body. As a result, the sliding resistance of the movable member is reduced, the movement of the movable member is smoothed, the weight of the movable member is reduced, and noise and wear of parts are reduced.
In the variable displacement compressor including the control valve according to the present invention, the control valve operates smoothly and discharge capacity control is performed smoothly, noise during operation of the control valve is reduced, and deterioration of the control valve over time is suppressed. The

本発明の実施例を説明する。 Examples of the present invention will be described.

図１に示すように、可変容量斜板式圧縮機１００は、複数のシリンダボア１０１ａを備えたシリンダブロック１０１と、シリンダブロック１０１の一端に設けられたフロントハウジング１０２と、バルブプレート１０３を介してシリンダブロック１０１の他端に設けられたリアハウジング１０４とを備えている。
シリンダブロック１０１とフロントハウジング１０２とによって画成されるクランク室１０５内を横断して、駆動軸１０６が配設されている。駆動軸１０６は斜板１０７に挿通されている。斜板１０７は、駆動軸１０６に固定されたロータ１０８と連結部１０９を介して結合し、駆動軸１０６により傾角可変に支持されている。ロータ１０８と斜板１０７との間に、斜板１０７を最小傾角へ向けて付勢するコイルバネ１１０が配設されている。斜板１０７を挟んでコイルバネ１１０の反対側に、最小傾角状態にある斜板１０７を傾角増大方向へ付勢するコイルバネ１１１が配設されている。 As shown in FIG. 1, a variable capacity swash plate compressor 100 includes a cylinder block 101 having a plurality of cylinder bores 101a, a front housing 102 provided at one end of the cylinder block 101, and a cylinder block via a valve plate 103. And a rear housing 104 provided at the other end of 101.
A drive shaft 106 is disposed across the crank chamber 105 defined by the cylinder block 101 and the front housing 102. The drive shaft 106 is inserted through the swash plate 107. The swash plate 107 is coupled to a rotor 108 fixed to the drive shaft 106 via a connecting portion 109 and is supported by the drive shaft 106 so that the tilt angle is variable. A coil spring 110 is disposed between the rotor 108 and the swash plate 107 to urge the swash plate 107 toward the minimum inclination angle. On the opposite side of the coil spring 110 across the swash plate 107, a coil spring 111 for urging the swash plate 107 in the minimum tilt state in the direction of increasing the tilt angle is disposed.

駆動軸１０６の一端はフロントハウジング１０２のボス部１０２ａを貫通してハウジング外まで延在しており、図示しない電磁クラッチを介して図示しない車両エンジンに連結している。駆動軸１０６とボス部１０２ａとの間に軸封装置１１２が配設されている。
駆動軸１０６は、ベアリング１１３、１１４、１１５、１１６によりラジアル方向及びスラスト方向に支持されている。 One end of the drive shaft 106 passes through the boss portion 102a of the front housing 102 and extends to the outside of the housing, and is connected to a vehicle engine (not shown) via an electromagnetic clutch (not shown). A shaft seal device 112 is disposed between the drive shaft 106 and the boss portion 102a.
The drive shaft 106 is supported in the radial direction and the thrust direction by bearings 113, 114, 115, and 116.

シリンダボア１０１ａ内に、ピストン１１７が配設され、ピストン１１７の一端部の窪み１１７ａ内に収容された一対のシュー１１８が斜板１０７の外周部を相対摺動可能に挟持している。駆動軸１０６の回転は、斜板１０７とシュー１１８とを介してピストン１１７の往復動に変換される。 A piston 117 is disposed in the cylinder bore 101a, and a pair of shoes 118 housed in a recess 117a at one end of the piston 117 sandwich the outer peripheral portion of the swash plate 107 so as to be slidable relative to each other. The rotation of the drive shaft 106 is converted into a reciprocating motion of the piston 117 via the swash plate 107 and the shoe 118.

リアハウジング１０４には、吸入室１１９と吐出室１２０とが形成されている。
吸入室１１９は、バルブプレート１０３に形成された連通孔１０３ａと図示しない吸入弁とを介してシリンダボア１０１ａに連通し、吐出室１２０は図示しない吐出弁とバルブプレート１０３に形成された連通孔１０３ｂとを介してシリンダボア１０１ａに連通している。吸入室１１９は吸入ポート１０４ａを介して図示しない車両空調装置の蒸発器に接続している。吐出室１２０は吐出ポート１０４ｂを介して図示しない車両空調装置の凝縮器に接続している。
フロントハウジング１０２、シリンダブロック１０１、バルブプレート１０３、リアハウジング１０４は、協働して、駆動軸１０６、ロータ１０８、連結部１０９、斜板１０７、シュー１１８、ピストン１１７、シリンダボア１０１ａ、吸入弁、吐出弁等で形成される圧縮機構を収容するハウジングを形成している。 A suction chamber 119 and a discharge chamber 120 are formed in the rear housing 104.
The suction chamber 119 communicates with the cylinder bore 101a via a communication hole 103a formed in the valve plate 103 and a suction valve (not shown), and the discharge chamber 120 communicates with a discharge hole (not shown) and a communication hole 103b formed in the valve plate 103. Is communicated with the cylinder bore 101a. The suction chamber 119 is connected to an evaporator of a vehicle air conditioner (not shown) through a suction port 104a. The discharge chamber 120 is connected to a condenser of a vehicle air conditioner (not shown) through a discharge port 104b.
Front housing 102, cylinder block 101, valve plate 103, and rear housing 104 cooperate to drive shaft 106, rotor 108, connecting portion 109, swash plate 107, shoe 118, piston 117, cylinder bore 101a, intake valve, discharge valve. A housing for accommodating a compression mechanism formed by a valve or the like is formed.

フロントハウジング１０２、シリンダブロック１０１、バルブプレート１０３、リアハウジング１０４は図示しないガスケットを介して隣接し、複数の通しボルトを用いて一体に組付けられている。 The front housing 102, the cylinder block 101, the valve plate 103, and the rear housing 104 are adjacent to each other through a gasket (not shown), and are integrally assembled using a plurality of through bolts.

リアハウジング１０４に制御弁２００が取り付けられている。制御弁２００は、クランク室１０５と吸入室１１９との間の抽気通路１２１の開度を調整し、ピストン１１７がガスを圧縮する際にクランク室１０５へ漏出するブローバイガスの吸入室１１９への流出量を制御する。抽気通路１２１は、クランク室１０５から、ベアリング１１５、１１６と駆動軸１０６との間の隙間と、シリンダブロック１０１に形成された空間１２２と、制御弁２００とを経由して、吸入室１１９に至る。
また、吐出室１２０とクランク室１０５との間の給気通路１２３には図示しない固定オリフィスを配設し、微小量の吐出ガスをクランク室１０５に導入して、ブローバイガスが不足する領域でのクランク室圧力上昇を補助している。
従って、制御弁２００によりクランク室圧力を変化させて、可変容量圧縮機１００の吐出容量を制御することができる。 A control valve 200 is attached to the rear housing 104. The control valve 200 adjusts the opening degree of the extraction passage 121 between the crank chamber 105 and the suction chamber 119, and the blow-by gas that leaks into the crank chamber 105 when the piston 117 compresses the gas flows out to the suction chamber 119. Control the amount. The bleed passage 121 extends from the crank chamber 105 to the suction chamber 119 via the gaps between the bearings 115 and 116 and the drive shaft 106, the space 122 formed in the cylinder block 101, and the control valve 200. .
In addition, a fixed orifice (not shown) is provided in the air supply passage 123 between the discharge chamber 120 and the crank chamber 105, and a small amount of discharge gas is introduced into the crank chamber 105 so that the blow-by gas is insufficient. Helps increase crankcase pressure.
Therefore, the discharge capacity of the variable capacity compressor 100 can be controlled by changing the crank chamber pressure by the control valve 200.

制御弁２００の構成を詳述する。
図２に示すように、制御弁２００は、感圧アクチュエータ２０１を備えている。感圧アクチュエータ２０１は、ステンレス系材料の薄板で形成されたダイアフラム２１０と、ステンレス系材料で形成された環状プレート２１１と、開放端にフランジ２１２ａが形成された有底円筒状のスリーブ２１２とを有している。ダイアフラム２１０は、環状プレート２１１とフランジ２１２ａとで挟持されている。前記３部材の接合部は真空中で外周側から全周溶接されて密閉されている。ダイアフラム２１０とスリーブ２１２とにより形成された真空の空間内に、可動コア２１３と、所定隙間を介して可動コア２１３に対向配置した固定コア２１４と、可動コア２１３に固定されると共に固定コア２１４に挿通されたソレノイドロッド２１５と、一端がソレノイドロッド２１５に係合し、ソレノイドロッド２１５を介して可動コア２１３をダイアフラム２１０側へ付勢する感圧バネ２１６と、感圧バネ２１６の他端を支持するバネガイド２１７とが配設されている。可動コア２１３のダイアフラム２１０との当接面は円形の平坦面を形成している。前記当接面は、なだらかな曲面を介して、円筒外周面に接続している。ダイアフラム２１０の可動コア２１３との当接部は、可動コア２１３に寄り添う形状に加圧成形されている。感圧アクチュエータ２０１は更に、スリーブ２１２の径方向外方に配設されたモールドコイル２２０と、モールドコイル２２０を収容するソレノイドケース２２１と、スリーブ２１２の底壁近傍部とソレノイドケース２２１との間の環状隙間を塞ぐ環状プレート２２２とを有している。可動コア２１３、固定コア２１４、環状プレート２２２、ソレノイドケース２２１により磁気回路が形成される。モールドコイル２２０に通電することにより、ダイアフラムに当接している可動コア２１３に吸引力が作用するので、前記通電力を調整することにより、感圧バネ２１６に付勢された可動コア２１３がダイアフラム２１０に印加する付勢力を調整することができる。 The configuration of the control valve 200 will be described in detail.
As shown in FIG. 2, the control valve 200 includes a pressure sensitive actuator 201. The pressure-sensitive actuator 201 has a diaphragm 210 made of a thin plate of stainless steel material, an annular plate 211 made of stainless steel material, and a bottomed cylindrical sleeve 212 having a flange 212a formed at the open end. is doing. The diaphragm 210 is sandwiched between the annular plate 211 and the flange 212a. The joint portion of the three members is hermetically sealed from the outer peripheral side in a vacuum. In the vacuum space formed by the diaphragm 210 and the sleeve 212, the movable core 213, the fixed core 214 arranged to face the movable core 213 through a predetermined gap, and the fixed core 214 fixed to the movable core 213 are fixed to the fixed core 214. The inserted solenoid rod 215, one end engaged with the solenoid rod 215, and the other end of the pressure-sensitive spring 216 is supported by the solenoid rod 215 for biasing the movable core 213 toward the diaphragm 210. A spring guide 217 is disposed. The contact surface of the movable core 213 with the diaphragm 210 forms a circular flat surface. The contact surface is connected to the outer peripheral surface of the cylinder via a gentle curved surface. The abutting portion of the diaphragm 210 with the movable core 213 is pressure-molded into a shape close to the movable core 213. The pressure-sensitive actuator 201 further includes a molded coil 220 disposed radially outward of the sleeve 212, a solenoid case 221 that accommodates the molded coil 220, and a portion near the bottom wall of the sleeve 212 and the solenoid case 221. And an annular plate 222 that closes the annular gap. The movable core 213, the fixed core 214, the annular plate 222, and the solenoid case 221 form a magnetic circuit. By energizing the mold coil 220, an attractive force acts on the movable core 213 that is in contact with the diaphragm. Therefore, the movable core 213 urged by the pressure-sensitive spring 216 is adjusted by adjusting the power transmission. The urging force applied to can be adjusted.

感圧アクチュエータ２０１は、黄銅系材料で形成されたバルブハウジング２３０にかしめ固定されている。
バルブハウジング２３０に形成された凹部と当該凹部を覆うダイアフラム２１０とにより感圧室２３１が形成されている。感圧室２３１に連通する弁孔２３０ａと連通孔２３０ｂとがバルブハウジング２３０に形成されている。感圧室２３１内で弁孔２３０ａの周囲に且つバルブハウジング２３０と一体に形成された弁座２３０ｃが、ダイアフラム２１０へ向けて突出し、ダイアフラム２１０に近接して対向している。弁孔２３０ａはクランク室１０５に連通し、連通孔２３０ｂは吸入室１１９に連通している。
感圧室圧力は、ダイアフラム２１０を弁座２３０ｃから離隔させる付勢力をダイアフラム２１０に印加し、感圧バネ２１６は、感圧室圧力の付勢力に抗してダイアフラム２１０を弁座２３０ｃに接近させる付勢力を、ソレノイドロッド２１５と可動コア２１３とを介してダイアフラム２１０に印加する。モールドコイル２２０の電磁力は、感圧バネ２１６の付勢力に対抗する付勢力を可動コア２１３に印加することにより、結果的にダイアフラム２１０を弁座２３０ｃから離隔させる付勢力をダイアフラム２１０に印加する。 The pressure sensitive actuator 201 is caulked and fixed to a valve housing 230 made of a brass material.
A pressure sensitive chamber 231 is formed by a recess formed in the valve housing 230 and a diaphragm 210 covering the recess. A valve hole 230 a communicating with the pressure sensing chamber 231 and a communication hole 230 b are formed in the valve housing 230. A valve seat 230 c formed integrally with the valve housing 230 around the valve hole 230 a in the pressure-sensitive chamber 231 protrudes toward the diaphragm 210 and faces the diaphragm 210 in close proximity. The valve hole 230 a communicates with the crank chamber 105, and the communication hole 230 b communicates with the suction chamber 119.
The pressure-sensitive chamber pressure applies a biasing force that separates the diaphragm 210 from the valve seat 230c to the diaphragm 210, and the pressure-sensitive spring 216 causes the diaphragm 210 to approach the valve seat 230c against the biasing force of the pressure-sensitive chamber pressure. An urging force is applied to the diaphragm 210 via the solenoid rod 215 and the movable core 213. The electromagnetic force of the mold coil 220 applies an urging force that opposes the urging force of the pressure-sensitive spring 216 to the movable core 213, and as a result, an urging force that separates the diaphragm 210 from the valve seat 230 c is applied to the diaphragm 210. .

ダイアフラム２１０は吸入室圧力に応答して変位し、弁座２３０ｃに当接、離間して弁孔２３０ａを開閉制御し、クランク室１０５と吸入室１１９との間の抽気通路１２１を開閉制御してクランク室圧力を変化させ、可変容量圧縮機１００の吐出容量を制御して、吸入室圧力を所定値に制御する。モールドコイル２２０の電磁力を調整することにより、感圧バネ２１６がソレノイドロッド２１５と可動コア２１３とを介してダイアフラム２１０に印加する付勢力を調整し、吸入室圧力を可変制御することができる。 The diaphragm 210 is displaced in response to the suction chamber pressure, contacts and separates from the valve seat 230c, controls the opening / closing of the valve hole 230a, and controls the opening / closing of the extraction passage 121 between the crank chamber 105 and the suction chamber 119. The crank chamber pressure is changed, the discharge capacity of the variable capacity compressor 100 is controlled, and the suction chamber pressure is controlled to a predetermined value. By adjusting the electromagnetic force of the mold coil 220, the biasing force applied to the diaphragm 210 by the pressure sensitive spring 216 via the solenoid rod 215 and the movable core 213 can be adjusted, and the suction chamber pressure can be variably controlled.

制御弁２００の作動を詳述する。
可変容量斜板式圧縮機１００が作動していない状態では、冷媒圧力はバランスしており、例えば外気温度が高ければ、吸入室圧力は著しく高くなっている。この状態では、ダイアフラム２１０は吸入室圧力を受けてバネガイド２１７側へ変位して弁座２３０ｃから離間し、抽気通路１２１は開放されている。可動コア２１３とソレノイドロッド２１５の連結体が図示しな位置決め部に当接して、ダイアフラム２１０の変位が規制されている。
上述の状態から可変容量斜板式圧縮機１００が起動すると、クランク室１０５内の冷媒ガスは抽気通路１２１を介して吸入室１１９に流出し、クランク室圧力が吸入室圧力と同等になる。この結果、斜板１０７の傾角が増加してピストンストロークが最大に維持される。
可変容量斜板式圧縮機１００の作動により吸入室圧力が徐々に低下すると、ダイアフラム２１０が弁座２３０ｃ側に変位し、吸入室圧力が所定値に達すると、ダイアフラム２１０が弁座２３０ｃに極めて接近するか当接し、クランク室１０５と吸入室１１９との連通が制限されてクランク室圧力が上昇し、斜板１０７の傾角が減少してピストンストロークが減少する。ピストンストロークの減少により吸入室圧力が上昇しようとするが、吸入室圧力が上昇すると、ダイアフラム２１０がバネガイド２１７側へ変位してクランク室１０５と吸入室１１９との連通が増大し、クランク室圧力が低下し、ピストンストロークの減少が止まって、ダイアフラム２１０の開度が所定開度に維持される。何らかの原因で吸入室圧力が低下すると、再びダイアフラム２１０が弁座２３０ｃ側へ変位し、クランク室１０５と吸入室１１９との連通が制限されてクランク室圧力が上昇し、斜板１０７の傾角が減少してピストンストロークが減少し、吸入室圧力が上昇する。
制御弁２００の上述の動作により、吸入室圧力を所定値に維持するようにピストンストローク、ひいては吐出容量が制御される。前記所定値は、モールドコイル２２０への通電量を調節することにより、可変調節可能である。 The operation of the control valve 200 will be described in detail.
When the variable capacity swash plate compressor 100 is not operating, the refrigerant pressure is balanced. For example, if the outside air temperature is high, the suction chamber pressure is remarkably high. In this state, the diaphragm 210 receives the suction chamber pressure and is displaced toward the spring guide 217 to be separated from the valve seat 230c, and the bleed passage 121 is opened. The connecting body of the movable core 213 and the solenoid rod 215 is brought into contact with a positioning portion (not shown), so that the displacement of the diaphragm 210 is restricted.
When the variable capacity swash plate compressor 100 is started from the above state, the refrigerant gas in the crank chamber 105 flows out to the suction chamber 119 through the extraction passage 121, and the crank chamber pressure becomes equal to the suction chamber pressure. As a result, the inclination angle of the swash plate 107 is increased and the piston stroke is maintained at the maximum.
When the suction chamber pressure gradually decreases due to the operation of the variable capacity swash plate compressor 100, the diaphragm 210 is displaced toward the valve seat 230c, and when the suction chamber pressure reaches a predetermined value, the diaphragm 210 is very close to the valve seat 230c. As a result, the communication between the crank chamber 105 and the suction chamber 119 is restricted, the crank chamber pressure increases, the inclination angle of the swash plate 107 decreases, and the piston stroke decreases. The suction chamber pressure tends to increase due to a decrease in the piston stroke. However, when the suction chamber pressure increases, the diaphragm 210 is displaced toward the spring guide 217 and the communication between the crank chamber 105 and the suction chamber 119 increases, and the crank chamber pressure is increased. The piston stroke decreases, and the opening of the diaphragm 210 is maintained at a predetermined opening. When the suction chamber pressure decreases for some reason, the diaphragm 210 is displaced again toward the valve seat 230c, the communication between the crank chamber 105 and the suction chamber 119 is restricted, the crank chamber pressure increases, and the inclination angle of the swash plate 107 decreases. As a result, the piston stroke decreases and the suction chamber pressure increases.
With the above-described operation of the control valve 200, the piston stroke and thus the discharge capacity are controlled so as to maintain the suction chamber pressure at a predetermined value. The predetermined value can be variably adjusted by adjusting the energization amount to the mold coil 220.

制御弁２００においては、感圧部材であるダイアフラム２１０が弁孔２３０ｃを開閉する弁体を形成することにより、可動部材の構成が簡素化されている。この結果、可動部材の摺動抵抗が減少して可動部材の動きがスムーズになり、可動部材の重量が減少して騒音や部品の磨耗が減少している。
ダイアフラム２１０は、薄板なので弁座２３０ｃへの着座性が良好であり、閉弁時のシール性が向上している。
黄銅系の材利で形成された弁座２３０ｃよりも高硬度のステンレス系材料でダイアフラム２１０を形成したので、弁座２３０ｃとの接離の繰り返しによるダイアフラム２１０の磨耗が抑制され、制御弁２００の信頼性が向上している。
弁座２３０ｃがダイアフラム２１０へ向けて感圧室２３１内に突出することにより、ダイアフラム２１０の弁座２３０ｃへの着座性が向上している。
ダイアフラム２１０の可動コア２１３との当接部を可動コア２１３に寄り添う形状に成形したので、ダイアフラム２１０と可動コア２１３との密着性が向上し、ダイアフラム２１０の弁座２３０ｃへの着座性が向上し、閉弁時のシール性が向上している。
感圧バネ２１６の付勢力をダイアフラム２１０に伝達する介挿部材が、電磁ソレノイドの可動コア２１３とソレノイドロッド２１５とを兼用しているので、可動部材の構成が簡素化され、生産性が向上している。 In the control valve 200, the configuration of the movable member is simplified by forming a valve body that opens and closes the valve hole 230c by the diaphragm 210 that is a pressure-sensitive member. As a result, the sliding resistance of the movable member is reduced, the movement of the movable member is smoothed, the weight of the movable member is reduced, and noise and wear of parts are reduced.
Since the diaphragm 210 is a thin plate, the seating property to the valve seat 230c is good, and the sealing property when the valve is closed is improved.
Since the diaphragm 210 is formed of a stainless steel material having a hardness higher than that of the valve seat 230c formed of brass material, wear of the diaphragm 210 due to repeated contact with and separation from the valve seat 230c is suppressed, and the control valve 200 Reliability is improved.
Since the valve seat 230c protrudes into the pressure sensing chamber 231 toward the diaphragm 210, the seating property of the diaphragm 210 on the valve seat 230c is improved.
Since the contact portion of the diaphragm 210 with the movable core 213 is shaped so as to be close to the movable core 213, the adhesion between the diaphragm 210 and the movable core 213 is improved, and the seating property of the diaphragm 210 on the valve seat 230c is improved. The sealing performance when the valve is closed is improved.
Since the insertion member that transmits the urging force of the pressure-sensitive spring 216 to the diaphragm 210 also serves as the movable core 213 and the solenoid rod 215 of the electromagnetic solenoid, the configuration of the movable member is simplified and the productivity is improved. ing.

弁孔２３０ａを吸入室１１９に連通させ、連通孔２３０ｂをクランク室１０５に連通させても良い。クランク室圧力を所定値に制御することができる。
弁孔２３０ａをクランク室１０５に連通させ、連通孔２３０ｂを吐出室１２０に連通させても良い。吐出室圧力を所定値に制御することができる。
図３に示すように、バルブハウジング２３０とは別体の弁座形成体２４０をバルブハウジング２３０に圧入固定し、弁座形成体２４０の先端に弁座２４０ｃを形成しても良い。弁座形成体２４０の圧入量を調節することにより、弁座２４０ｃとダイアフラム２１０との間の隙間を調節し、ダイアフラム２１０のストロークを調節して適正化し、制御弁２００の信頼性を向上させることができる。
制御弁２００に代えて、図４に示すように、バルブハウジング２３０’に形成された凹部と当該凹部を覆うダイアフラム２１０’とにより形成された感圧室２３１’と、バルブハウジング２３０’に形成され感圧室２３１’に連通する弁孔２３０ａ’と連通孔２３０ｂ’と、弁孔２３０ａ’の周囲に形成された弁座２３０ｃ’と、介挿部材２１３’を介してダイアフラム２１０’を付勢する感圧バネ２１６’とを備え、ソレノイドを備えない機械式制御弁２００’を配設しても良い。
制御弁２００に加えて、クランク室１０５と吐出室１２０との間の給気通路を別途設け、当該給気通路上に図４に示す制御弁２００’を配設し、弁孔２３０ａ’をクランク室１０５に連通させ、連通孔２３０ｂ’を吐出室１２０に連通させ、制御弁２００’の動作を制御弁２００の動作に優先させて、吐出室圧力が所定値を超えないように可変容量圧縮機１００の吐出容量を制御しても良い。 The valve hole 230 a may be communicated with the suction chamber 119 and the communication hole 230 b may be communicated with the crank chamber 105. The crank chamber pressure can be controlled to a predetermined value.
The valve hole 230a may be communicated with the crank chamber 105, and the communication hole 230b may be communicated with the discharge chamber 120. The discharge chamber pressure can be controlled to a predetermined value.
As shown in FIG. 3, a valve seat forming body 240 separate from the valve housing 230 may be press-fitted and fixed to the valve housing 230, and a valve seat 240 c may be formed at the tip of the valve seat forming body 240. By adjusting the press-fitting amount of the valve seat forming body 240, the clearance between the valve seat 240c and the diaphragm 210 is adjusted, the stroke of the diaphragm 210 is adjusted and optimized, and the reliability of the control valve 200 is improved. Can do.
Instead of the control valve 200, as shown in FIG. 4, a pressure-sensitive chamber 231 ′ formed by a recess formed in the valve housing 230 ′ and a diaphragm 210 ′ covering the recess is formed in the valve housing 230 ′. A diaphragm 210 'is urged through a valve hole 230a' and a communication hole 230b 'communicating with the pressure sensing chamber 231', a valve seat 230c 'formed around the valve hole 230a', and an insertion member 213 '. A mechanical control valve 200 ′ having a pressure-sensitive spring 216 ′ and not having a solenoid may be provided.
In addition to the control valve 200, a separate air supply passage is provided between the crank chamber 105 and the discharge chamber 120, and the control valve 200 'shown in FIG. 4 is disposed on the air supply passage, and the valve hole 230a' is cranked. The variable displacement compressor communicates with the chamber 105, communicates the communication hole 230b ′ with the discharge chamber 120, prioritizes the operation of the control valve 200 ′ over the operation of the control valve 200, and the discharge chamber pressure does not exceed a predetermined value. The discharge capacity of 100 may be controlled.

図５に示すように、給気通路１２３に配設された固定オリフィスに代えて、給気通路１２３を開閉制御する第２制御弁３００が制御弁２００に付加されている。第２制御弁３００は、制御弁２００のバルブハウジング２３０に形成された弁室２３０ｄと、弁室２３０ｄに連通する第２弁孔２３０ｅと、第２弁孔２３０ｅに連通する第２連通孔２３０ｆと、弁室２３０ｄに配設されバネ２４０の付勢力を受けて第２弁孔２３０ｅを開閉する弁体２４１と、弁体２４１と制御弁２００のダイアフラム２１０との間に配設され、制御弁２００の弁孔２３０ａに遊動可能に挿通されて一端がダイアフラム２１０部材に当接し他端が弁体２４１に当接する伝達ロッド２４２とを備えている。弁室２３０ｄは吐出室１２０に連通し、第２連通孔２３０ｆはクランク室１０５に連通している。第２制御弁３００は制御弁２００の開閉動作と連動して動作し、制御弁２００のダイアフラム２１０が弁座２３０ｃから離間して制御弁２００が開弁状態にある時には第２制御弁３００の弁体２４１が第２弁孔２３０ｅを塞いで第２制御弁３００は閉弁状態にあり、制御弁２００のダイアフラム２１０が弁座２３０ｃに当接して制御弁２００が閉弁状態にある時には第２制御弁３００の弁体２４１が第２弁孔２３０ｅを開いて第２制御弁３００は開弁状態にある。制御弁２００に制御弁３００を付加することにより、抽気通路１２１の開閉と給気通路１２３の開閉とを連動制御して、クランク室圧力を調整することができる。
尚、制御弁２００に第２制御弁３００を付加する場合には、抽気通路１２１に固定オリフィスを設ける。 As shown in FIG. 5, a second control valve 300 for opening and closing the air supply passage 123 is added to the control valve 200 in place of the fixed orifice disposed in the air supply passage 123. The second control valve 300 includes a valve chamber 230d formed in the valve housing 230 of the control valve 200, a second valve hole 230e communicating with the valve chamber 230d, and a second communication hole 230f communicating with the second valve hole 230e. The valve body 241 is disposed in the valve chamber 230d and receives the urging force of the spring 240 to open and close the second valve hole 230e, and is disposed between the valve body 241 and the diaphragm 210 of the control valve 200. And a transmission rod 242 that is movably inserted into the valve hole 230a and that has one end in contact with the diaphragm 210 member and the other end in contact with the valve body 241. The valve chamber 230 d communicates with the discharge chamber 120, and the second communication hole 230 f communicates with the crank chamber 105. The second control valve 300 operates in conjunction with the opening / closing operation of the control valve 200. When the diaphragm 210 of the control valve 200 is separated from the valve seat 230c and the control valve 200 is in the open state, the valve of the second control valve 300 is operated. When the body 241 closes the second valve hole 230e, the second control valve 300 is in a closed state, and when the diaphragm 210 of the control valve 200 abuts the valve seat 230c and the control valve 200 is in the closed state, the second control is performed. The valve body 241 of the valve 300 opens the second valve hole 230e, and the second control valve 300 is in the open state. By adding the control valve 300 to the control valve 200, the opening and closing of the extraction passage 121 and the opening and closing of the air supply passage 123 can be controlled in an interlocked manner to adjust the crank chamber pressure.
When the second control valve 300 is added to the control valve 200, a fixed orifice is provided in the extraction passage 121.

図６に示すように、給気通路１２３に配設された固定オリフィスに代えて、給気通路１２３を開閉制御する第２制御弁４００が制御弁２００に付加されている。第２制御弁４００は、制御弁２００のバルブハウジング２３０に形成された弁室２３０ｇと、弁室２３０ｇに連通する第２弁孔２３０ｈと、第２弁孔２３０ｈに連通する第２連通孔２３０ｉと、弁室２３０ｇに配設されバネ２５０の付勢力を受けて第２弁孔２３０ｈを開閉する弁体２５１と、弁体２５１と制御弁２００のダイアフラム２１０との間に配設され、第２弁孔２３０ｈに遊動可能に挿通され制御弁２００の弁孔２３０ａに相当する支持孔に摺動可能に挿通されて、一端がダイアフラム２１０に対峙し他端が弁体２５１に当接する伝達ロッド２５２とを有している。弁体２５１と伝達ロッド２５２とは一体形成されている。弁体２５１と伝達ロッド２５２との一体形成体に制御弁２００の感圧室２３１と弁室２３０ｇとの間の連通路２５３が形成されている。伝達ロッド２５２のダイアフラム２１０に対峙する一端が制御弁２００の弁座を形成し、連通路２５３がダイアフラム２１０によって開閉される制御弁２００の弁孔を形成している。
弁室２３０ｇひいては連通路２５３はクランク室１０５に連通し、第２連通孔２３０ｉは吐出室１２０に連通し、制御弁２００の連通孔２３０ｂは吸入室１１９に連通している。第２制御弁４００は制御弁２００の開閉動作と連動して動作し、制御弁２００のダイアフラム２１０が弁座から離間して制御弁２００が開弁状態にある時には第２制御弁４００の弁体２５１が第２弁孔２３０ｈを塞いで第２制御弁４００は閉弁状態にあり、制御弁２００のダイアフラム２１０が弁座に当接して制御弁２００が閉弁状態にある時には第２制御弁４００の弁体２５１が第２弁孔２３０ｈを開いて第２制御弁４００は開弁状態ある。制御弁２００に第２制御弁４００を付加することにより、抽気通路１２１の開閉と給気通路１２３の開閉とを連動制御して、クランク室圧力を調整することができる。
尚、制御弁２００に第２制御弁４００を付加する場合には、抽気通路１２１に固定オリフィスを設ける。 As shown in FIG. 6, a second control valve 400 for opening and closing the air supply passage 123 is added to the control valve 200 in place of the fixed orifice disposed in the air supply passage 123. The second control valve 400 includes a valve chamber 230g formed in the valve housing 230 of the control valve 200, a second valve hole 230h communicating with the valve chamber 230g, and a second communication hole 230i communicating with the second valve hole 230h. The valve body 251 is disposed in the valve chamber 230g and opens and closes the second valve hole 230h under the urging force of the spring 250, and is disposed between the valve body 251 and the diaphragm 210 of the control valve 200. A transmission rod 252 that is slidably inserted into the hole 230h and is slidably inserted into a support hole corresponding to the valve hole 230a of the control valve 200, with one end facing the diaphragm 210 and the other end contacting the valve body 251. Have. The valve body 251 and the transmission rod 252 are integrally formed. A communication passage 253 between the pressure sensing chamber 231 and the valve chamber 230g of the control valve 200 is formed in an integrally formed body of the valve body 251 and the transmission rod 252. One end of the transmission rod 252 facing the diaphragm 210 forms a valve seat of the control valve 200, and the communication passage 253 forms a valve hole of the control valve 200 that is opened and closed by the diaphragm 210.
The valve chamber 230g and thus the communication passage 253 communicate with the crank chamber 105, the second communication hole 230i communicates with the discharge chamber 120, and the communication hole 230b of the control valve 200 communicates with the suction chamber 119. The second control valve 400 operates in conjunction with the opening / closing operation of the control valve 200. When the diaphragm 210 of the control valve 200 is separated from the valve seat and the control valve 200 is in the open state, the valve body of the second control valve 400 is used. 251 closes the second valve hole 230h, the second control valve 400 is in a closed state, and when the diaphragm 210 of the control valve 200 contacts the valve seat and the control valve 200 is in the closed state, the second control valve 400 is closed. The valve body 251 opens the second valve hole 230h, and the second control valve 400 is in the open state. By adding the second control valve 400 to the control valve 200, the opening / closing of the extraction passage 121 and the opening / closing of the supply passage 123 can be controlled in an interlocked manner to adjust the crank chamber pressure.
When the second control valve 400 is added to the control valve 200, a fixed orifice is provided in the extraction passage 121.

図７に示すように、ソレノイドケース２２１に形成されダイアフラム２１０を間に挟んで感圧室２３１に対向配置された第２感圧室２３１”と、ソレノイドケース２２１に形成され第２感圧室２３１”に連通する第２連通孔２２１ａとを、制御弁２００に付加して、制御弁５００を形成しても良い。弁孔２３０ａをクランク室１０５に連通させ、連通孔２３０ｂを吐出室１２０に連通させ、第２連通孔２２１ａを吸入室１１９又はクランク室１０５又は吐出室１２０よりも下流側の吐出通路に連通させる。感圧室圧力と第２感圧室圧力との差圧がダイアフラム２１０に印加され、前記差圧の変化に応じてダイアフラム２１０が変位し、弁座２３０ｃに当接、離間して弁孔２３０ａを開閉することにより、吐出室１２０とクランク室１０５との間の給気通路が開閉制御されてクランク室圧力が調節され、斜板傾角が調節されて吐出容量が制御され、吐出室圧力と吸入室圧力との差圧、又は吐出室圧力とクランク室圧力との差圧、又は吐出室圧力と吐出通路圧力との差圧が所定値に制御される。 As shown in FIG. 7, a second pressure sensing chamber 231 ″ formed in the solenoid case 221 and disposed opposite to the pressure sensing chamber 231 with the diaphragm 210 interposed therebetween, and a second pressure sensing chamber 231 formed in the solenoid case 221. The control valve 500 may be formed by adding the second communication hole 221 a communicating with the control valve 200 to the control valve 200. The valve hole 230 a is communicated with the crank chamber 105, the communication hole 230 b is communicated with the discharge chamber 120, and the second communication hole 221 a is communicated with the suction chamber 119, the crank chamber 105, or the discharge passage downstream of the discharge chamber 120. A differential pressure between the pressure sensing chamber pressure and the second pressure sensing chamber pressure is applied to the diaphragm 210, and the diaphragm 210 is displaced in accordance with the change in the differential pressure, abuts on and separates from the valve seat 230c, and opens the valve hole 230a. By opening and closing, the supply passage between the discharge chamber 120 and the crank chamber 105 is controlled to be opened and closed, the crank chamber pressure is adjusted, the swash plate inclination is adjusted, the discharge capacity is controlled, and the discharge chamber pressure and the suction chamber are controlled. The differential pressure from the pressure, or the differential pressure between the discharge chamber pressure and the crank chamber pressure, or the differential pressure between the discharge chamber pressure and the discharge passage pressure is controlled to a predetermined value.

本発明は、可変容量圧縮機の容量制御弁のみならず流体通路を開閉制御する制御弁に広く適用可能である。
感圧アクチュエータ２０１の内部を大気圧としても良い。
可動コア２１３のダイアフラム２１０との当接部を平坦面としたが、曲面や円錐面としても良い。
弁座２３０ｃ、２３０ｃ’、２４０ｃは平面でも良く、曲面や円錐面としても良い。
感圧アクチュエータ２０１を移動させて、座２３０ｃとダイアフラム２１０との間の隙間を調節しても良い。
ダイアフラム２１０と弁座２３０ｃとの間に耐磨耗性被膜を介在させても良い。
本発明を揺動板式可変容量圧縮機に適用しても良く、モータで駆動される可変容量圧縮機に適用しても良い。
本発明は、現状のＲ１３４ａ冷媒を使用する可変容量圧縮機のみならずＣＯ２等の新冷媒を使用する可変容量圧縮機にも適用可能である。 The present invention can be widely applied not only to a capacity control valve of a variable capacity compressor but also to a control valve that controls opening and closing of a fluid passage.
The inside of the pressure sensitive actuator 201 may be atmospheric pressure.
Although the contact portion of the movable core 213 with the diaphragm 210 is a flat surface, it may be a curved surface or a conical surface.
The valve seats 230c, 230c ′, and 240c may be flat surfaces, and may be curved surfaces or conical surfaces.
The gap between the seat 230c and the diaphragm 210 may be adjusted by moving the pressure sensitive actuator 201.
A wear-resistant coating may be interposed between the diaphragm 210 and the valve seat 230c.
The present invention may be applied to a swing plate type variable displacement compressor or a variable displacement compressor driven by a motor.
The present invention can be applied not only to a variable capacity compressor using the current R134a refrigerant but also to a variable capacity compressor using a new refrigerant such as CO2.

本発明の実施例に係る制御弁を備える可変容量斜板式圧縮機の断面図である。It is sectional drawing of a variable capacity | capacitance swash plate type compressor provided with the control valve based on the Example of this invention. 本発明の実施例１に係る制御弁の断面図である。（ａ）は開弁状態を示し、（ｂ）は閉弁状態を示す。It is sectional drawing of the control valve which concerns on Example 1 of this invention. (A) shows a valve open state, (b) shows a valve closed state. 本発明の実施例１に係る制御弁の変形例の部分断面図である。It is a fragmentary sectional view of the modification of the control valve concerning Example 1 of the present invention. 本発明の実施例１に係る制御弁の変形例の断面図である。It is sectional drawing of the modification of the control valve which concerns on Example 1 of this invention. 本発明の実施例２に係る制御弁の部分断面図である。（ａ）は第２制御弁の閉弁状態を示し、（ｂ）は第２制御弁の開弁状態を示す。It is a fragmentary sectional view of the control valve concerning Example 2 of the present invention. (A) shows the closed state of the second control valve, and (b) shows the opened state of the second control valve. 本発明の実施例３に係る制御弁の部分断面図である。（ａ）は第２制御弁の閉弁状態を示し、（ｂ）は第２制御弁の開弁状態を示す。It is a fragmentary sectional view of the control valve concerning Example 3 of the present invention. (A) shows the closed state of the second control valve, and (b) shows the opened state of the second control valve. 本発明の実施例４に係る制御弁の断面図である。It is sectional drawing of the control valve which concerns on Example 4 of this invention.

符号の説明Explanation of symbols

１００可変容量斜板式圧縮機
１１９吸入室
１２０吐出室
２００、５００制御弁
３００、４００第２制御弁 100 Variable capacity swash plate compressor 119 Suction chamber 120 Discharge chamber 200, 500 Control valve 300, 400 Second control valve

Claims

バルブハウジングに形成された凹部と当該凹部を覆う感圧部材とにより形成された感圧室と、バルブハウジングに形成され感圧室に連通する弁孔と連通孔と、感圧室内で弁孔の周囲に形成され感圧部材に近接して対向する弁座と、感圧室圧力が感圧部材に印加する付勢力に対向する付勢力を感圧部材に印加する付勢手段とを備え、感圧室圧力の変化に応じて感圧部材が変位し、弁座に当接、離間して弁孔を開閉することにより、弁孔と感圧室と連通孔とを含む流体通路を開閉制御することを特徴とする制御弁。 A pressure-sensitive chamber formed by a recess formed in the valve housing and a pressure-sensitive member covering the recess, a valve hole formed in the valve housing and communicating with the pressure-sensitive chamber, and a valve hole in the pressure-sensitive chamber. A valve seat formed in the vicinity and facing the pressure-sensitive member; and a biasing means for applying a biasing force to the pressure-sensitive member opposite to a biasing force applied by the pressure-sensitive chamber pressure to the pressure-sensitive member. The pressure sensitive member is displaced according to the change in the pressure chamber pressure, contacts and separates from the valve seat, and opens and closes the valve hole, thereby opening and closing the fluid passage including the valve hole, the pressure sensitive chamber, and the communication hole. A control valve characterized by that.

感圧部材は金属ダイアフラムであることを特徴とする請求項１に記載の制御弁。 The control valve according to claim 1, wherein the pressure sensitive member is a metal diaphragm.

金属ダイアフラムは弁座よりも高硬度の材料で形成されていることを特徴とする請求項２に記載の制御弁。 The control valve according to claim 2, wherein the metal diaphragm is made of a material having a hardness higher than that of the valve seat.

弁座は金属ダイアフラムへ向けて感圧室内に突出していることを特徴とする請求項２又は３に記載の制御弁。 The control valve according to claim 2 or 3, wherein the valve seat protrudes into the pressure sensitive chamber toward the metal diaphragm.

弁座と金属ダイアフラムとの間の隙間を調節する調節手段を備えることを特徴とする請求項２乃至４の何れか１項に記載の制御弁。 The control valve according to any one of claims 2 to 4, further comprising adjusting means for adjusting a gap between the valve seat and the metal diaphragm.

付勢手段は介挿部材を介して金属ダイアフラムを弁座へ向けて付勢し、金属ダイアフラムの介挿部材との当接部は介挿部材に寄り添う形状に加圧成形されていることを特徴とする請求項２乃至５の何れか１項に記載の制御弁。 The urging means urges the metal diaphragm toward the valve seat through the insertion member, and the contact portion of the metal diaphragm with the insertion member is pressure-molded into a shape close to the insertion member. The control valve according to any one of claims 2 to 5.

付勢手段はソレノイドを有し、介挿部材は磁性材料から成るソレノイドの可動コア又は可動コアと連結したソレノイドロッドであることを特徴とする請求項６に記載の制御弁。 7. The control valve according to claim 6, wherein the urging means includes a solenoid, and the insertion member is a solenoid core made of a magnetic material or a solenoid rod connected to the movable core.

感圧部材を間に挟んで感圧室に対向配置された第２感圧室と、感圧部材を除く第２感圧室囲壁に形成され第２感圧室に連通する第２連通孔とを備え、付勢手段は感圧室圧力と第２感圧室圧力との差圧が感圧部材に印加する付勢力に対向する付勢力を感圧部材に印加し、前記差圧の変化に応じて感圧部材が変位し、弁座に当接、離間して弁孔を開閉することにより、弁孔と感圧室と連通孔とを含む流体通路を開閉制御することを特徴とする請求項１乃至７の何れか１項に記載の制御弁。 A second pressure sensing chamber disposed opposite the pressure sensing chamber with the pressure sensing member interposed therebetween, a second communication hole formed in the second pressure sensing chamber surrounding wall excluding the pressure sensing member and communicating with the second pressure sensing chamber; And the biasing means applies a biasing force opposite to the biasing force applied to the pressure-sensitive member by the differential pressure between the pressure-sensitive chamber pressure and the second pressure-sensitive chamber pressure, and changes the differential pressure. In response, the pressure sensitive member is displaced, contacts and separates from the valve seat, and opens and closes the valve hole to control opening and closing of the fluid passage including the valve hole, the pressure sensitive chamber, and the communication hole. Item 8. The control valve according to any one of Items 1 to 7.

傾角可変の斜板要素と斜板要素の回転に従動して往復動するピストンとを含む可変容量圧縮機であって、クランク室と吸入室との間の抽気通路と、当該抽気通路の途上に配設された請求項１乃至７の何れか１項に記載の制御弁とを備え、弁孔はクランク室又は吸入室の一方に連通し、連通孔はクランク室又は吸入室の他方に連通し、クランク室圧力又は吸入室圧力の変化に応答して感圧部材が変位し、弁座に当接、離間して前記抽気通路を開閉制御することにより、クランク室圧力が可変制御され、ピストンストロークが可変制御されることを特徴とする可変容量圧縮機。 A variable displacement compressor including a swash plate element having a variable tilt angle and a piston that reciprocates following the rotation of the swash plate element, and a bleed passage between the crank chamber and the suction chamber, and in the middle of the bleed passage A control valve according to any one of claims 1 to 7, wherein the valve hole communicates with one of the crank chamber or the suction chamber, and the communication hole communicates with the other of the crank chamber or the suction chamber. The pressure-sensitive member is displaced in response to the change in the crank chamber pressure or the suction chamber pressure, and the crank chamber pressure is variably controlled by controlling the opening and closing of the extraction passage by contacting and separating from the valve seat. Is a variable capacity compressor characterized in that it is variably controlled.

吐出室とクランク室との間の給気通路と、当該給気通路を開閉制御する第２制御弁とを備え、第２制御弁は、弁室と、弁室に連通する第２弁孔と、第２弁孔に連通する第２連通孔と、弁室に配設され第２弁孔を開閉する弁体と、当該弁体と請求項１乃至７の何れか１項に記載の制御弁の感圧部材との間に配設され、請求項１乃至７の何れか１項に記載の制御弁の弁孔に挿通されて一端が請求項１乃至７の何れか１項に記載の制御弁の感圧部材に当接し他端が弁体に当接する伝達ロッドとを有し、第２制御弁は請求項１乃至７の何れか１項に記載の制御弁の開閉動作と連動して動作し、請求項１乃至７の何れか１項に記載の制御弁が開弁状態にある時には第２制御弁は閉弁状態にあり、請求項１乃至７の何れか１項に記載の制御弁が閉弁状態にある時には第２制御弁は開弁状態にあることを特徴とする請求項９に記載の可変容量圧縮機。 An air supply passage between the discharge chamber and the crank chamber, and a second control valve for controlling the opening and closing of the air supply passage. The second control valve includes a valve chamber and a second valve hole communicating with the valve chamber. 8. A second communication hole that communicates with the second valve hole, a valve body that is disposed in the valve chamber and opens and closes the second valve hole, the valve body, and the control valve according to claim 1. The control according to any one of claims 1 to 7, wherein the control valve is disposed between the pressure-sensitive member and inserted into the valve hole of the control valve according to any one of claims 1 to 7. 8. A transmission rod that abuts on the pressure-sensitive member of the valve and the other end abuts on the valve body, and the second control valve is interlocked with the opening / closing operation of the control valve according to claim 1. The second control valve is in a closed state when operating and the control valve according to any one of claims 1 to 7 is in an open state, and the control according to any one of claims 1 to 7. The valve is closed Variable displacement compressor according to claim 9 second control valve, characterized in that in the open state when that.

弁体と伝達ロッドとは一体形成され、弁体と伝達ロッドとの一体形成体に形成された感圧室と弁室との間の連通路が請求項１乃至７の何れか１項に記載の制御弁の弁孔を形成し、伝達ロッドの感圧部材に対峙する一端が請求項１乃至７の何れか１項に記載の制御弁の弁座を形成し、請求項１乃至７の何れか１項に記載の制御弁の連通孔は吸入室に連通し、第２制御弁の弁室はクランク室に連通し、第２連通孔は吐出室に連通することを特徴とする請求項１０に記載の可変容量圧縮機。 The valve body and the transmission rod are integrally formed, and the communication path between the pressure sensing chamber and the valve chamber formed in the integral body of the valve body and the transmission rod is any one of claims 1 to 7. A valve hole of the control valve is formed, and one end facing the pressure-sensitive member of the transmission rod forms the valve seat of the control valve according to any one of claims 1 to 7, and any one of claims 1 to 7 The communication hole of the control valve according to claim 1 communicates with the suction chamber, the valve chamber of the second control valve communicates with the crank chamber, and the second communication hole communicates with the discharge chamber. The variable capacity compressor described in 1.

傾角可変の斜板要素と斜板要素の回転に従動して往復動するピストンとを含む可変容量圧縮機であって、クランク室と吐出室との間の給気通路と、当該給気通路の途上に配設された請求項１乃至７の何れか１項に記載の制御弁とを備え、弁孔はクランク室に連通し、連通孔は吐出室に連通し、吐出室圧力の変化に応答して感圧部材が変位し、弁座に当接、離間して前記連通路を開閉制御することにより、クランク室圧力が可変制御され、ピストンストロークが可変制御されることを特徴とする可変容量圧縮機。 A variable capacity compressor including a swash plate element having a variable tilt angle and a piston that reciprocates following the rotation of the swash plate element, and an air supply passage between a crank chamber and a discharge chamber, A control valve according to any one of claims 1 to 7 disposed on the way, wherein the valve hole communicates with the crank chamber, the communication hole communicates with the discharge chamber, and responds to changes in the discharge chamber pressure. Then, the pressure sensing member is displaced, abuts on and away from the valve seat, and the communication passage is controlled to open and close, whereby the crank chamber pressure is variably controlled and the piston stroke is variably controlled. Compressor.

傾角可変の斜板要素と斜板要素の回転に従動して往復動するピストンとを含む可変容量圧縮機であって、クランク室と吐出室との間の給気通路と、当該給気通路の途上に配設された請求項８に記載の制御弁とを備え、弁孔はクランク室に連通し、連通孔は吐出室に連通し、第２連通孔は吸入室又はクランク室又は吐出室よりも下流側の吐出通路に連通し、吐出室圧力と吸入室圧力との差圧、又は吐出室圧力とクランク室圧力との差圧、又は吐出室圧力と吐出通路圧力との差圧に応答して感圧部材が変位し、弁座に当接、離間して前記連通路を開閉制御することにより、クランク室圧力が可変制御され、ピストンストロークが可変制御されることを特徴とする可変容量圧縮機。 A variable capacity compressor including a swash plate element having a variable tilt angle and a piston that reciprocates following the rotation of the swash plate element, and an air supply passage between a crank chamber and a discharge chamber, And a control hole according to claim 8 disposed in the middle, wherein the valve hole communicates with the crank chamber, the communication hole communicates with the discharge chamber, and the second communication hole extends from the suction chamber, the crank chamber, or the discharge chamber. Communicates with the downstream discharge passage and responds to the differential pressure between the discharge chamber pressure and the suction chamber pressure, the differential pressure between the discharge chamber pressure and the crank chamber pressure, or the differential pressure between the discharge chamber pressure and the discharge passage pressure. The variable pressure compression is characterized in that the pressure-sensitive member is displaced, abuts on and away from the valve seat, and the communication passage is controlled to open and close, whereby the crank chamber pressure is variably controlled and the piston stroke is variably controlled. Machine.