JP5697024B2 - Compressor - Google Patents

Compressor

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JP5697024B2
JP5697024B2 JP2010285563A JP2010285563A JP5697024B2 JP 5697024 B2 JP5697024 B2 JP 5697024B2 JP 2010285563 A JP2010285563 A JP 2010285563A JP 2010285563 A JP2010285563 A JP 2010285563A JP 5697024 B2 JP5697024 B2 JP 5697024B2
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JP2010285563A
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JP2012132372A (en )
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田口 幸彦
幸彦 田口
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サンデン株式会社
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00Multi-cylinder pumps characterised by number or arrangement of cylinders
    • F04B27/08Multi-cylinder pumps characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00Multi-cylinder pumps characterised by number or arrangement of cylinders
    • F04B27/08Multi-cylinder pumps characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14Control
    • F04B27/16Control of pumps with stationary cylinders
    • F04B27/18Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804Controlled by crankcase pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10Adaptations or arrangements of distribution members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00Multi-cylinder pumps characterised by number or arrangement of cylinders
    • F04B27/08Multi-cylinder pumps characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14Control
    • F04B27/16Control of pumps with stationary cylinders
    • F04B27/18Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804Controlled by crankcase pressure
    • F04B2027/1809Controlled pressure
    • F04B2027/1818Suction pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00Multi-cylinder pumps characterised by number or arrangement of cylinders
    • F04B27/08Multi-cylinder pumps characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14Control
    • F04B27/16Control of pumps with stationary cylinders
    • F04B27/18Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804Controlled by crankcase pressure
    • F04B2027/1822Valve-controlled fluid connection
    • F04B2027/1827Valve-controlled fluid connection between crankcase and discharge chamber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00Multi-cylinder pumps characterised by number or arrangement of cylinders
    • F04B27/08Multi-cylinder pumps characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14Control
    • F04B27/16Control of pumps with stationary cylinders
    • F04B27/18Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804Controlled by crankcase pressure
    • F04B2027/1822Valve-controlled fluid connection
    • F04B2027/1831Valve-controlled fluid connection between crankcase and suction chamber

Description

本発明は、吐出室を跨いで吸入室にまで延設される吸入通路の開度を調整する開度調整弁を備えた圧縮機に関する。 The present invention relates to a compressor provided with opening regulating valve for adjusting the opening of the suction passage which extends to the suction chamber across the discharge chamber.

従来、車輌エアコンシステムに使用される往復動圧縮機においては、冷媒吸入時に吸入リード弁が自励振動を起こして吸入圧力の脈動が発生し、係る圧力脈動が上流側回路(蒸発器)に伝播して異音が発生することがあった。 Conventionally, vehicle in the reciprocating compressor used in the air conditioning system, the pulsation of suction pressure suction reed valve when the refrigerant suction is causing self-excited vibration is generated, propagated to the pressure pulsation upstream circuit according (evaporator) noise was sometimes that occurs.
この吸入圧力の脈動を低減するため、特許文献1及び特許文献2には、吸入通路の開度を調整する開度調整弁を備えた圧縮機が開示されている。 To reduce the pulsation of the suction pressure, in Patent Document 1 and Patent Document 2, a compressor is disclosed which includes an opening degree adjustment valve that adjusts the opening of the suction passage.
また、特許文献3には、吸入冷媒が吸入通路内で加熱されて温度上昇することを抑制するため、吸入通路の壁面を断熱部材で被覆した圧縮機が開示されている。 Further, Patent Document 3, in order to prevent the suction refrigerant is heated the temperature rise in the suction passage, the compressor is disclosed in which covering the wall surface of the suction passage in the heat insulating member.

特開2000−136776号公報 JP 2000-136776 JP 特開2005−337232号公報 JP 2005-337232 JP 特開2005−147021号公報 JP 2005-147021 JP

ところで、特許文献2に開示されるように、吸入通路が吐出室を跨いで吸入室にまで延設される往復動圧縮機では、吸入通路内の吸入冷媒が吐出室内の高温の吐出冷媒によって加熱され易く、これによりシリンダボアへ吸入される冷媒の温度が上昇して冷媒の密度が小さくなり、圧縮機の性能を低下させる要因となっていた。 Incidentally heating, as disclosed in Patent Document 2, in the reciprocating compressor suction passage is extended to the suction chamber across the discharge chamber, the suction refrigerant in the suction passage by the high temperature of the discharge refrigerant in the discharge chamber liable to be, thereby the temperature of the coolant rises decreases the density of the refrigerant sucked into the cylinder bores, which is a factor of lowering the performance of the compressor.
従って、特許文献3に開示される、吸入通路を断熱部材で断熱する構造を、特許文献1,2に開示されるような圧縮機に適用し、吸入通路内での吸入冷媒の加熱を抑制することが望まれるが、専用の断熱部材を別途追加すると、圧縮機のコストが増加してしまうという問題があった。 Therefore, as disclosed in Patent Document 3, a structure to insulate the suction passage with a heat insulating member, applied to a compressor as disclosed in Patent Documents 1 and 2, to suppress the heating of the sucked refrigerant in the suction passage thing is desired, when a special insulating member to be added separately, the cost of the compressor there is a problem that increases.

そこで、本発明は、吐出室を跨いで吸入室まで延設される吸入通路の断熱を、簡便な構造で行える圧縮機を提供することを目的とする。 Accordingly, the present invention provides a thermal insulation of the suction passage that extends to the suction chamber across the discharge chamber, and an object thereof is to provide a compressor capable of performing a simple structure.

上記目的を達成するために、本発明に係る圧縮機は、駆動軸の軸線の延長線上に配設した吸入室、前記吸入室を囲む環状に配設した吐出室、及び、前記吐出室の径方向の外側から前記吐出室を跨いで前記吸入室にまで延設される吸入通路が形成されたシリンダヘッドと、前記吸入通路の開度を調整する開度調整弁と、を備えた圧縮機において、前記開度調整弁は、筒状に形成されて前記吸入通路の前記吐出室を跨ぐ部分に内挿される通路形成部材を備え、前記通路形成部材は前記シリンダヘッドの成形材料であるアルミ系材料よりも熱伝導率が低い断熱材料で形成されている To achieve the above object, a compressor according to the present invention, the suction chamber which is disposed on an extension of the axis of the drive shaft, the discharge chamber is disposed annularly surrounding the suction chamber, and the diameter of the discharge chamber a cylinder head having intake passage is formed extending from the outer direction to the suction chamber across said discharge chamber, and the opening regulating valve for adjusting an opening degree of the suction passage, the compressor provided with the opening regulating valve includes a passage forming member which is inserted into the portion is formed in a cylindrical shape to straddle the discharge chamber of the suction passage, wherein the passage forming member is an aluminum-based material is a molding material of the cylinder head thermal conductivity is formed at a lower heat-insulating material than.
このような構成では、吸入通路に内挿される通路形成部材は、 シリンダヘッドの成形材料であるアルミ系材料よりも熱伝導率が低い断熱材料で形成されるから、吸入通路と吐出室との間での熱交換を抑制する。 In such a configuration, the passage forming member is inserted into the suction passage, since the thermal conductivity is formed at a lower heat-insulating material than aluminum-based material which is a molding material of the cylinder head, between the suction passage and the discharge chamber to suppress the heat exchange.

ここで 、前記通路形成部材の外周と前記吸入通路の内周との間に、環状の隙間を設けることができる。 Here, between the inner periphery of the outer peripheral and the suction passage of the passage forming member may be provided with annular gap.
このような構成では、通路形成部材の外周と吸入通路の内周との間に隙間を設けることで、吐出室内の流体と吸入通路内の流体との間における熱交換をより一層抑制できる。 In such a configuration, by providing a gap between the inner periphery of the outer peripheral and the suction passage of the passage forming member, a heat exchange between the fluid ejection chamber and the fluid in the suction passage can be further suppressed.
また、前記通路形成部材を、前記吸入通路に対してOリングによって弾性支持することができる。 Furthermore, the passage forming member may be elastically supported by the O-ring with respect to the suction passage.

また、前記環状の隙間と前記通路形成部材の内部空間とを連通する連通孔を、前記通路形成部材に設けることができる。 Further, a communication hole for communicating the interior space of the passage forming member and the gap of said annular, may be provided in the passage forming member.
このような構成では、流体(冷媒) 封入する前の真空引きの際に、通路形成部材の外周と吸入通路の内周との間の隙間の空気を、連通孔を介して排出させることができる。 In this configuration, when the vacuum prior to enclosing the fluid (refrigerant), the air gap between the inner periphery of the outer peripheral and the suction passage of the passage forming member, be discharged through the communication hole it can.
また、前記通路形成部材は、前記吸入通路の開度を減少させる方向の弁体の移動を規制する規制部を一体的に有することができる。 Moreover, the passage member, a regulating portion for regulating movement of the valve body in a direction to reduce the opening of the suction passage may have integrally.
このような構成では、通路形成部材は、開度調整弁の弁体の移動を規制するから、通路形成部材は、吸入通路を断熱しつつ、開度調整弁の構成要素として機能する。 In such a configuration, the passage forming member, since to restrict movement of the valve body of the opening control valve, passage member while insulating the suction passage, and functions as a component of the opening regulating valve.

また、前記通路形成部材の上流側端部が、前記吸入通路の軸方向への移動を規制されて前記吸入通路の内周壁に対し係止されるようにできる。 Further, the upstream end of the passage forming member, it is restricted from moving in the axial direction of the suction passage as locked to the inner peripheral wall of the suction passage.
このような構成では、通路形成部材、引いては、開度調整弁全体を、吸入通路内の所定位置に位置決めできる。 In such a configuration, the passage forming member, pulls the entire opening regulating valve, it can be positioned at a predetermined position in the suction passage.

本発明の実施形態に係る圧縮機の縦断面図である。 It is a longitudinal sectional view of a compressor according to an embodiment of the present invention. 本発明の実施形態に係る圧縮機を構成する開度調整弁の縦断面図であり、(a)は最大開弁状態を示す縦断面図、(b)は最小開弁状態を示す縦断面図である。 Is a longitudinal sectional view of the opening regulating valve constituting the compressor according to an embodiment of the present invention, (a) shows the maximum open valve longitudinal sectional view showing a state, (b) is a longitudinal sectional view showing the minimum open state it is. 本発明の実施形態に係る圧縮機に対する開度調整弁の取り付け状態を示す部分拡大図である。 It is a partially enlarged view showing a mounting state of the opening regulating valve for a compressor according to an embodiment of the present invention.

以下、本発明の実施形態を添付図面に基づいて詳細に説明する。 It will be described in detail with reference to embodiments of the present invention in the accompanying drawings.
図1は、実施形態における圧縮機を示し、この圧縮機は、車輌エアコンシステムに使用する斜板式可変容量型の往復動圧縮機100である。 Figure 1 shows a compressor in the embodiment, the compressor is a reciprocating compressor 100 of the swash plate type variable displacement type used in a vehicle air-conditioning system.

圧縮機100は、シリンダブロック101と、シリンダブロック101の一端に連結したフロントハウジング102と、シリンダブロック101の他端にバルブプレート103を介して連結したシリンダヘッド104と、を備える。 Compressor 100 includes a cylinder block 101, a front housing 102 coupled to one end of the cylinder block 101, a cylinder head 104 which is connected through a valve plate 103 to the other end of the cylinder block 101, a.
シリンダブロック101とフロントハウジング102とによりクランク室105が画成され、駆動軸106は、クランク室105内を横断するように、シリンダブロック101及びフロントハウジング102に対してラジアル方向及びスラスト方向のベアリング113,115,116を介して回転可能に支持される。 The crank chamber 105 is defined by the cylinder block 101 and the front housing 102, drive shaft 106, so as to cross the crank chamber 105, the radial direction and the thrust direction relative to the cylinder block 101 and front housing 102 Bearing 113 It is rotatably supported through a 115.

駆動軸106の先端部は、フロントハウジング102のボス部102a内を貫通してフロントハウジング102の外部に突出し、この外部に突出した先端部に、車両のエンジンやモータなどの駆動源が動力伝達装置を介して連結される。 Tip of the drive shaft 106 projects through the inside boss portion 102a of the front housing 102 to the outside of the front housing 102, a tip portion that protrudes to the outside, the driving source is a power transmission device such as a vehicle engine or motor It is linked via a.
尚、駆動軸106とボス部102aとの間に軸封装置112を設け、フロントハウジング102の内部(クランク室105)を外部から遮断している。 Incidentally, the shaft sealing device 112 between the drive shaft 106 and the boss portion 102a is provided, and blocking the interior of the front housing 102 (the crank chamber 105) from the outside.

クランク室105内において、駆動軸106にはロータ108が固着され、このロータ108に対して連結部109を介して斜板107を取り付けてある。 In the crank chamber 105, the drive shaft 106 rotor 108 is fixed, is mounted to the swash plate 107 via a connecting portion 109 with respect to the rotor 108.
斜板107は、その中心部に形成した貫通孔に駆動軸106が貫通し、駆動軸106と一体的に回転すると共に、駆動軸106の軸方向にスライド可能でかつ傾動可能に支持されている。 Swash plate 107, the drive shaft 106 penetrates the through hole formed in the center, as well as rotate integrally with the drive shaft 106 is slidably and and tiltably supported in the axial direction of the drive shaft 106 . また、ロータ108は、フロントハウジング102の前端側内壁に配設したスラストベアリング114によって回転可能に支持されている。 The rotor 108 is rotatably supported by a thrust bearing 114 which is disposed on the front end side inner wall of the front housing 102.

ロータ108と斜板107との間には、斜板107の傾角を減少させる方向に向けて斜板107を付勢するコイルバネ110が装着され、また、駆動軸106に固定された止め輪130と斜板107との間には、斜板107の傾角を増大させる方向に向けて斜板107を付勢するコイルバネ111が装着されている。 Between the rotor 108 and the swash plate 107, coil spring 110 for urging the swash plate 107 toward a direction of decreasing the inclination angle of the swash plate 107 is mounted, also, the snap ring 130 fixed to the drive shaft 106 between the swash plate 107, coil spring 111 for urging the swash plate 107 in a direction to increase the inclination angle of the swash plate 107 is mounted.
シリンダブロック101には、駆動軸106を囲むように複数のシリンダボア101aが形成され、各シリンダボア101aには、ピストン117が駆動軸106の軸方向に往復動可能に収容されている。 The cylinder block 101, a plurality of cylinder bores 101a so as to surround the drive shaft 106 is formed, in each cylinder bore 101a, the piston 117 is reciprocally accommodated in the axial direction of the drive shaft 106. 各ピストン117は、シュー118を介して斜板107の外周部に係合していて、斜板107が駆動軸106と共に回転すると、各ピストン117は、シリンダボア101a内を往復動する。 Each piston 117 via shoes 118 engaged with the outer peripheral portion of the swash plate 107, the swash plate 107 rotates with the drive shaft 106, each piston 117 reciprocates in the cylinder bore 101a.

シリンダヘッド104には、駆動軸106の軸線の延長線上に吸入室119が配設されると共に、吸入室119を環状に取り囲む吐出室120が配設される。 The cylinder head 104, together with the suction chamber 119 is disposed on an extension of the axis of the drive shaft 106, the discharge chamber 120 is disposed to surround the suction chamber 119 annularly. 吸入室119は、バルブプレート103に設けた連通孔103a及び吸入弁(図示せず)を介してシリンダボア101aと連通し、吐出室120は、吐出弁(図示せず)及びバルブプレート103に設けた連通孔103bを介してシリンダボア101aと連通している。 Suction chamber 119 communicates with the cylinder bore 101a through the communication hole 103a and the suction valve provided in the valve plate 103 (not shown), the discharge chamber 120, a discharge valve (not shown) and is provided in the valve plate 103 and it communicates with the cylinder bore 101a through the communication hole 103b.
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、シリンダヘッド104が、図示しないガスケットを介して複数の通しボルト140によって締結され、圧縮機ハウジングが形成される。 Front housing 102, the cylinder block 101, valve plate 103, cylinder head 104, is fastened by a plurality of through bolts 140 via a gasket (not shown), the compressor housing is formed.

また、シリンダブロック101の外側には、マフラ121を設けてある。 Further, on the outside of the cylinder block 101 is provided with a muffler 121. マフラ121は、有底筒状の蓋部材122を、シリンダブロック101の外面に立設した筒状壁101bに対してシール部材を介して連結して形成される。 Muffler 121, a bottomed cylindrical lid member 122 is formed by connecting through a sealing member against the cylindrical wall 101b erected on the outer surface of the cylinder block 101. 蓋部材122には、吐出ポート122aが形成され、この吐出ポート122aは、車輌エアコンシステムの吐出側冷媒回路(凝縮器)に接続される。 The lid member 122, the discharge port 122a is formed, the discharge port 122a is connected to the discharge side refrigerant circuit of the vehicle air-conditioning system (condenser).
マフラ121内のマフラ空間123と吐出室120とを連通させる連通路124が、シリンダブロック101、バルブプレート103、シリンダヘッド104にわたって形成され、マフラ121と連通路124とは、吐出室120と吐出ポート122aとの間を連通させる吐出通路を形成し、マフラ121は、吐出通路途上の拡張空間を形成する。 Communication passage 124 for communicating the muffler space 123 in the muffler 121 with the discharge chamber 120, the cylinder block 101, valve plate 103, is formed over the cylinder head 104 and the muffler 121 and the communication path 124, the discharge chamber 120 and discharge port forming a discharge passage communicating between 122a, muffler 121 forms an expanded space of the discharge passage developing.

また、マフラ121の入口を開閉する逆止弁200が、マフラ121内に配置されている。 Further, a check valve 200 for opening and closing the inlet of the muffler 121 is disposed in the muffler 121. 逆止弁200は、連通路124とマフラ空間123との接続部に配置され、連通路124(上流側)とマフラ空間123(下流側)との圧力差に応答して動作し、連通路124内の圧力(上流側圧力)Puがマフラ空間123内の圧力(下流側圧力)Pdよりも所定値SL以上に高い場合(Pu−Pd>SL>0)に開弁し 、係る圧力差の条件を満たさない場合(Pu−Pd≦SL>0)に閉弁する。 The check valve 200 is disposed in the connecting portion between the communication passage 124 and the muffler space 123, and operates in response to a pressure differential of the communication passage 124 and (upstream side) and the muffler space 123 (downstream side), the communication passage 124 the pressure of the inner (upstream pressure) Pu is opened to the pressure in the muffler space 123 is higher than a predetermined value SL than (downstream pressure) Pd (Pu-Pd> SL > 0), the conditions of pressure difference according It closed when not satisfied (Pu-Pd ≦ SL> 0).

シリンダヘッド104には、吸入ポート104a、及び、吸入ポート104aと吸入室119とを連通させる連通路104bが形成され、吸入室119は、連通路104b及び吸入ポート104aで形成される吸入通路104cを介して、車輌エアコンシステムの吸入側冷媒回路(蒸発器)と接続される。 The cylinder head 104, the suction port 104a, and is formed communicating passage 104b which communicates with the suction port 104a and suction chamber 119, suction chamber 119, a suction passage 104c formed in the communication passage 104b and the suction port 104a through, it is connected to the suction side refrigerant circuit of the vehicle air-conditioning system (evaporator). 吸入通路104c(連通路104b)は、シリンダヘッド104の径方向外側から吐出室120を跨ぐように、シリンダヘッド104の径方向に略沿って直線的に延設される。 Suction passage 104c (the communication passage 104b) is so as to straddle the discharge chamber 120 from the radially outer side of the cylinder head 104, is linearly extends substantially along the radial direction of the cylinder head 104.

また、連通路104bには、吸入通路104cの開度を調整する開度調整弁250を配置してある。 Further, the communication passage 104b is are disposed opening regulating valve 250 for adjusting the opening of the suction passage 104c.
開度調整弁250は、断熱材料で円筒状に形成され連通路104bに内挿される通路形成部材254と、この通路形成部材254の下流側に係止される出口孔253aを備えた弁ハウジング253と、弁ハウジング253内に収容される弁体251と、弁体251を吸入通路104cの開度が小さくなる方向(閉弁方向)に向けて付勢する圧縮コイルバネ252とを備える。 Opening regulating valve 250 includes a passage forming member 254 inserted into the communicating path 104b is formed in a cylindrical shape by insulating material, a valve housing 253 with an outlet hole 253a to be locked to the downstream side of the passage forming member 254 When provided with a valve body 251 which is accommodated in the valve housing 253, and a compression coil spring 252 for urging the opening decreases direction of the suction passage 104c of the valve body 251 (valve closing direction).

そして、吸入ポート104aに吸入された冷媒(流体)は、通路形成部材254の内部空間254a(実質的な吸入通路104c)及び弁ハウジング253の出口孔253aを介して吸入室119内に導入される。 The refrigerant sucked into the suction port 104a (fluid) is introduced into suction chamber 119 through the outlet hole 253a of the internal space 254a (substantial suction passage 104c) and the valve housing 253 of the passage forming member 254 .
開度調整弁250は、吸入通路104cを構成する通路形成部材254の内部空間254a(上流側)と吸入室119(下流側)との圧力差、つまり冷媒流量の変化に追従して吸入通路104cの開度を調整するもので、冷媒流量が減少すれば圧縮コイルバネ252の閉弁付勢力によって吸入通路104c(出口孔253a)の開度を小さくし、冷媒流量が増大すれば圧縮コイルバネ252の閉弁付勢力に抗して吸入通路104c(出口孔253a)の開度を大きくするように動作する。 Opening regulating valve 250, the internal space 254a pressure difference (an upstream side) and the suction chamber 119 (the downstream side), i.e. the suction passage 104c following the change of the refrigerant flow passage forming member 254 constituting a suction passage 104c It adjusts the opening, and decreases the opening of the suction passage 104c (exit hole 253a) by closing biasing force of the compression coil spring 252 a decrease refrigerant flow rate, closing of the compression coil spring 252 an increase coolant flow against the biasing force valve operating to increase the opening of the suction passage 104c (exit hole 253a).

本実施形態において、シリンダヘッド104は、アルミ系材料によって形成される一方、弁ハウジング253、通路形成部材254及び弁体251は、アルミ系材料よりも熱伝導率が低い断熱材料である、ポリアミド系樹脂などの樹脂材料で形成されている。 In the present embodiment, the cylinder head 104, while being formed of an aluminum-based material, the valve housing 253, passage forming member 254 and the valve body 251, a heat insulating material lower thermal conductivity than aluminum-based materials, polyamide-based It is formed of a resin material such as a resin.
尚、開度調整弁250の詳細な構造については、後で詳細に説明する。 The detailed structure of the opening regulating valve 250 will be described later in detail.

シリンダヘッド104には、容量制御弁300を取り付けてある。 The cylinder head 104, is mounted to the displacement control valve 300.
容量制御弁300は、吐出室120とクランク室105とを連通する連通路125の開度を調整し、クランク室105への吐出冷媒の導入量を制御する。 Displacement control valve 300, the discharge chamber 120 and the crank chamber 105 to adjust the opening degree of the communication passage 125 which communicates to control the introduction amount of discharged refrigerant to the crank chamber 105.
また、クランク室105内の冷媒は、ベアリング115,116と駆動軸106との隙間を抜け、シリンダブロック101に形成した空間127、更に、バルブプレート103に形成したオリフィス103cを介して吸入室119へ流入する。 The refrigerant in the crank chamber 105, passes through the gap of the bearing 115, 116 and the drive shaft 106, the space 127 formed in the cylinder block 101, further into the suction chamber 119 through the orifice 103c formed in the valve plate 103 It flows.

従って、容量制御弁300によりクランク室105への吐出冷媒の導入量を調整してクランク室105の圧力を変化させ、斜板107の傾斜角、つまりピストン117のストローク量を変化させることにより、圧縮機100の吐出容量を制御することができる。 Therefore, the displacement control valve 300 to adjust the introduction amount of discharged refrigerant to the crank chamber 105 to change the pressure in the crank chamber 105, the inclination angle of the swash plate 107, i.e. by varying the stroke of the piston 117, the compression it is possible to control the discharge capacity of the machine 100.
尚、容量制御弁300は、外部信号に基づいて内蔵するソレノイドへの通電量を調整し、連通路126を介して容量制御弁300の感圧室に導入される吸入室119の圧力が所定値になるように、圧縮機100の吐出容量を制御し、また、内蔵するソレノイドへの通電を遮断することにより、連通路125を強制開放して、圧縮機100の吐出容量を最小に制御する。 The capacity control valve 300 adjusts the amount of current supplied to the solenoid of built based on an external signal, the pressure is a predetermined value of the suction chamber 119 through the communication passage 126 is introduced into the pressure sensitive chamber of the displacement control valve 300 so that, by controlling the discharge displacement of the compressor 100, also by turning off the power to the internal solenoid, to force open the communication passage 125, controls the discharge capacity of the compressor 100 to the minimum.

次に、開度調整弁250の構造を、図2及び図3を参照して詳細に説明する。 Next, the structure of the opening regulating valve 250 will be described in detail with reference to FIGS.
開度調整弁250の弁ハウジング253は、周壁に複数の出口孔253aを備える有底筒状に形成され、弁ハウジング253の開放端の内周に通路形成部材254の下流側端の外周が嵌合して、通路形成部材254の内部空間254aに連続する内部空間253bを形成する。 The valve housing 253 of the opening regulating valve 250 is formed in a bottomed cylindrical shape having a plurality of exit holes 253a in the peripheral wall, fitting the outer circumference of the downstream end of the passage forming member 254 on the inner periphery of the open end of the valve housing 253 combined with, to form an internal space 253b continuous with the internal space 254a of the passage forming member 254.

尚、弁ハウジング253の開放端の内周に、全周にわたって溝(凹部)253eを形成する一方、通路形成部材254の下流側端部の外周に、全周にわたって突起部(凸部)254eを形成してある。 Incidentally, the inner periphery of the open end of the valve housing 253, while forming a groove (recess) 253e over the entire circumference, the outer circumference of the downstream end of the passage forming member 254, projections over the entire periphery (the convex portion) 254e It is formed. そして、通路形成部材254と弁ハウジング253とを嵌合させるときに、相互に弾性変形して突起部(凸部)254eが弁ハウジング253の開放端の内周に嵌合することを許容し、弾性復帰力によって前記溝(凹部)253e内に突起部(凸部)254eに嵌まり込んで、通路形成部材254と弁ハウジング253とが抜け防止された状態で嵌合されるようにしてある。 Then, allows the fitting to the protrusions and mutually elastically deformed to the inner periphery of the open end of the (convex portion) 254e valve housing 253 when fitting the passage forming member 254 and the valve housing 253, fits with the protrusion (convex portion) 254e in the groove (recess) in 253e by the elastic restoring force, are then so that the passage forming member 254 and the valve housing 253 is fitted in prevention state missing.

また、弁体251は、弁ハウジング253の内部空間253b内に嵌合する外径の有底筒状に形成され、弁ハウジング253の内部空間253b内に、底部を内部空間253bの開放端側として嵌挿される。 Further, the valve body 251 is formed in a bottomed cylindrical shape having an outer diameter that fits within the interior space 253b of the valve housing 253, within the interior space 253b of the valve housing 253, the bottom as an open end side of the internal space 253b It is fitted.
そして、弁体251が、弁ハウジング253の内部空間253b内を軸方向に沿って移動することで、弁ハウジング253の周壁に開口する出口孔253aの開口面積を可変とする。 Then, the valve body 251 and moving along the inner space 253b of the valve housing 253 in the axial direction, and varies the open area of ​​the outlet hole 253a that opens in the circumferential wall of the valve housing 253.

即ち、弁体251が弁ハウジング253の内部空間253bの底側に近づくと、弁体251の周壁で閉鎖される出口孔253aの面積が減って、吸入通路104cの開度が増加する一方、弁体251が弁ハウジング253の内部空間253bの底側から遠ざかると、弁体251の周壁で閉鎖される出口孔253aの面積が増え、吸入通路104cの開度が減少する。 In other words, approaches the bottom side of the internal space 253b of the valve body 251 valve housing 253, decreases the area of ​​the outlet holes 253a are closed by the peripheral wall of the valve body 251, while the opening of the suction passage 104c is increased, the valve moves away from the bottom side of the internal space 253b of the body 251 the valve housing 253, increasing the area of ​​the outlet holes 253a are closed by the peripheral wall of the valve body 251, the opening degree of the suction passage 104c is decreased.
圧縮コイルバネ252は、弁ハウジング253の底部と弁体251の底部との間に配設され、弁体251を弁ハウジング253の内部空間253bの開放端側、即ち、吸入通路104cの開度が減少する側に向けて付勢する付勢手段である。 Compression coil spring 252 is disposed between the bottom of the bottom and the valve body 251 of the valve housing 253, the open end side of the internal space 253b of the valve body 251 valve housing 253, i.e., the opening degree of the suction passage 104c decreases a biasing means for urging on the side.

また、通路形成部材254は、弁ハウジング253の開放端の内側に一端が嵌合する筒状に形成され、弁体251の底壁と当接することで弁体251の通路形成部材254側に向かう移動、即ち、吸入通路104cの開度を減少させる方向(閉弁方向)の移動を規制する規制部254bを、前記一端の環状端部に複数突出形成してある。 Furthermore, the passage forming member 254, inside one end of the open end of the valve housing 253 is formed in a cylindrical shape to be fitted, towards the passage forming member 254 side of the valve body 251 by contact with the bottom wall of the valve body 251 movement, i.e., a regulating portion 254b for restricting the movement of the direction of decreasing the opening of the suction passage 104c (valve closing direction), are a plurality of protruded annular end of said one end.
規制部254bは、通路形成部材254の筒状部の内外径と同じ内外径の円弧状に形成され、各規制部254bの高さを揃えてある。 Regulating portion 254b is formed in a circular arc shape having the same inner and outer diameter as the inner and outer diameters of the cylindrical portion of the passage forming member 254, it is aligned the height of each restricting portion 254b.

弁体251の底壁が規制部254bに当接して弁体251の移動が規制されている状態では、吸入通路104cが最小の開度になるが、本実施形態においては、最小開度は全閉状態ではなく、出口孔253aが僅かに開くように設定してある。 In a state where the bottom wall of the valve body 251 is moved in contact with the valve body 251 to the regulating portion 254b is restricted, but suction passage 104c is minimized opening, in the present embodiment, the minimum opening is all rather than closed, the outlet holes 253a has been set to be slightly open. これにより、冷媒循環が停止したときに、吸入室119内の圧力と、吸入ポート104a側の圧力とが等しくなる。 Thus, when the refrigerant circulation is stopped, the pressure in the suction chamber 119, and the pressure in the suction port 104a side is equal.
尚、規制部254bの数は、1個であってもよいが、等角度間隔で複数(2〜4個)の規制部254bを設けることが好ましい。 The number of regulating portion 254b may be one, but it is preferable to provide a regulating portion 254b of the plurality (2 to 4) at equal angular intervals.

また、通路形成部材254の下流側の環状端部から突出する規制部254bを設けずに、通路形成部材254の下流側の環状端部を規制部として用い、弁体251の底壁と通路形成部材254とが環状に当接する構造とすることが可能である。 Also, without providing the restricting portion 254b projecting from the annular end portion of the downstream side of the passage forming member 254, with annular end of the downstream side of the passage forming member 254 as a restricting portion, the bottom wall and the passage formed in the valve body 251 and the member 254 is capable of abutting against structure annularly.
但し、係る構造とした場合、弁体251の底壁と通路形成部材254とが環状に密着することで、吸入通路104cと吸入室119とを連通させる経路を確保できなくなる。 However, when the above structure, a bottom wall and the passage forming member 254 of the valve body 251 by close contact with the annular, can not be secured a path communicating the suction passage 104c and the suction chamber 119. そこで、本実施形態では、通路形成部材254の下流側の環状端部から突出する規制部254bを設け、弁体251の底壁が規制部254bに当接した状態で、通路形成部材254の下流側の環状端部と弁体251の底壁との間に隙間が生じるようにしてある。 Therefore, in this embodiment, provided with a regulating portion 254b projecting from the annular end portion of the downstream side of the passage forming member 254, with the bottom wall of the valve body 251 abuts on the regulating portion 254b, downstream of the passage forming member 254 between the bottom wall side of the annular end portion and the valve body 251 are as a gap is formed.

一方、吸入通路104cの開度を増大させる方向(開弁方向)、換言すれば、弁ハウジング253の底部に近づく方向への弁体251の移動は、弁体251の筒状部の開放側端部が、弁ハウジング253の底壁が当接することで規制される。 Meanwhile, the direction of increasing the opening of the suction passage 104c (valve opening direction), in other words, movement of the valve body 251 in the direction approaching the bottom of the valve housing 253, the open end of the cylindrical portion of the valve body 251 part is the bottom wall of the valve housing 253 is restricted by abutment.
弁ハウジング253の底壁には、弁体251の背面側空間250bと吸入室119とを連通する小孔253bが形成され、これにより、弁体251は上流側(内部空間254a、吸入通路104c)と下流側(吸入室119)との圧力差に応答して動作し、吸入通路104cの開度を調整する。 The bottom wall of the valve housing 253, the small holes 253b are formed for communicating the back side space 250b and the suction chamber 119 of the valve body 251, thereby, the valve body 251 is upstream (interior space 254a, the suction passage 104c) and it operates in response to a pressure difference between the downstream side (the suction chamber 119), adjusting the opening of the suction passage 104c.

また、弁ハウジング253の開放端にフランジ253cが形成される一方、通路形成部材254には、弁ハウジング253と通路形成部材254とを嵌合させたときに、前記フランジ253cと共に周溝250cを形成するフランジ254fを形成してある。 Further, while the formed flange 253c at the open end of the valve housing 253, the passage forming member 254, when mated to the valve housing 253 and the passage forming member 254, forming a circumferential groove 250c with the flange 253c It is formed with a flange 254f to.
そして、周溝250cにエラストマーで形成したOリング255を装着し、周溝250cから突出するOリング255を押し潰すようにして、連通路104bに嵌合させることで、開度調整弁250は、Oリング255によって連通路104bに対して弾性支持される。 Then, mounting the O-ring 255 formed in elastomer circumferential groove 250c, so as to crush the O-ring 255 that projects from the circumferential groove 250c, that fitted in the communication passage 104b, the opening regulating valve 250, It is elastically supported with respect to the communication passage 104b by O-ring 255.

また、連通路104bの内径よりも吸入ポート104aの内径を大きくし、連通路104bと吸入ポート104aとの境界部分に段差部104eを形成してある一方、通路形成部材254の上流側端部には、連通路104bに連続する拡径部である吸入ポート104a(拡径部)に嵌合するフランジ254cを形成してある。 Moreover, than the inner diameter of the communication passage 104b to increase the inner diameter of the suction port 104a, while is formed a step portion 104e to a boundary portion between the communication passage 104b and the suction port 104a, the upstream end of the passage forming member 254 is is formed with flanges 254c to fit into the suction port 104a (enlarged diameter portion) is expanded diameter portion continuous with the communication passage 104b.
即ち、フランジ254cの径は、連通路104bの内径よりも大きく、かつ、吸入ポート104aの内径よりも小さく設定され、通路形成部材254を含む開度調整弁250は、弁ハウジング253側を下流に向けて、吸入ポート104aから連通路104bに対して差し入れられ、フランジ254cが、連通路104bと吸入ポート104aとの境界部分の段差部104eに突き当たることで、開度調整弁250(通路形成部材254)の連通路104b(吸入通路104c)に対する位置決めがなされる。 That is, the diameter of the flange 254c is larger than the inner diameter of the communication passage 104b, and is set smaller than the inner diameter of the suction port 104a, the opening regulating valve 250 includes a passage forming member 254, the valve housing 253 side to the downstream towards, pledged against the communication passage 104b from the suction port 104a, the flange 254c is that abuts the step portion 104e of the boundary portion between the communication passage 104b and the suction port 104a, the opening regulating valve 250 (passage forming member 254 ) positioned with respect to the communication passage 104b (suction passage 104c) is made of.

そして、吸入ポート104aに、外部冷媒回路(外部流体回路)のフランジ400を内挿接続すると、通路形成部材254のフランジ254cが、フランジ400の先端部400aと段差部104eとで挟まれて、開度調整弁250の抜けがフランジ400によって阻止される。 Then, the suction port 104a, when interpolation connecting flange 400 of the external refrigerant circuit (external fluid circuit), the flange 254c of the passage forming member 254, sandwiched between the front end portion 400a and the step portion 104e of the flange 400, the opening omission in degrees adjustment valve 250 is blocked by the flange 400.
尚、シリンダヘッド104から開度調整弁250を取り外す場合には、フランジ254cに形成した複数個所の切り欠き254gから工具差し込み、工具にフランジ254cを引っ掛けて取り出す。 Note that when detaching the opening regulating valve 250 from the cylinder head 104, insert the notch 254g of a plurality of points which is formed in the flange 254c, taken hooking flange 254c to the tool.

外部冷媒回路のフランジ400の外周面には溝400bが形成され、この溝400bにエラストマーで形成したOリング259を装着することで、吸入ポート104aの内周面とフランジ400の外周面との隙間をシールしている。 The outer peripheral surface of the flange 400 of the external refrigerant circuit is formed a groove 400b, by attaching the O-ring 259 which is formed of an elastomeric into the groove 400b, the gap between the inner and outer circumferential surfaces of the flange 400 of the suction port 104a sealing the.
また、開度調整弁250が連通路104bに対して位置決めされた状態で、連通路104bの内周と通路形成部材254の外周との間に環状の隙間260が形成されるように、連通路104bの内径及び通路形成部材254の外径を設定してある。 Further, as the opening regulating valve 250 is in a state of being positioned with respect to the communication passage 104b, an annular gap 260 is formed between the outer periphery of the inner periphery and the passage forming member 254 of the communication passage 104b, the communication passage It is set the outer diameter of the inner diameter and the passage forming member 254 of 104b. 更に、通路形成部材254の周壁には、隙間260と、通路形成部材254の内部空間254aとを連通させる連通孔254dを形成してある。 Further, the peripheral wall of the passage forming member 254, a gap 260, is formed a communication hole 254d for communicating the internal space 254a of the passage forming member 254.

次に、上記の開度調整弁250の作用を説明する。 Next, the operation of the opening control valve 250.
前述のように、シリンダヘッド104等のハウジングはアルミ系材料(金属材料)で形成される一方、開度調整弁250を構成する弁ハウジング253,通路形成部材254及び弁体251は樹脂材料で形成される。 As described above, forming a housing, such as cylinder head 104 while being formed by an aluminum-based material (metal material), the valve housing 253 that constitutes the opening regulating valve 250, the passage forming member 254 and the valve body 251 of a resin material It is.

連通路104bは、吐出室120を跨いで延設されるため、連通路104bと吐出室120との間における断熱性が低いと、連通路104b内の吸入冷媒に吐出室120内の吐出冷媒の熱が伝達し、吸入冷媒の温度が上昇してしまう。 Communicating path 104b is to be extended across the discharge chamber 120, the lower heat insulation between the communication passage 104b and the discharge chamber 120, the discharge refrigerant in the discharge chamber 120 to the suction refrigerant in the communication passage 104b heat is transferred, the temperature of suction refrigerant rises. しかし、上記圧縮機100においては、シリンダヘッド104の成形材料であるアルミ系材料に比べて熱伝導率が極めて小さい樹脂材料で筒状に形成した通路形成部材254を、連通路104bに内挿させてあるので、吐出室120内の吐出冷媒の熱が、連通路104b(通路形成部材254の内部空間254a)内の吸入冷媒に伝達することが抑制され、吸入冷媒の温度上昇が抑制される。 However, in the compressor 100, the passage forming member 254 thermal conductivity is formed in a cylindrical shape with an extremely small resin material as compared with aluminum-based material is a molding material of the cylinder head 104, thereby inserted in the communication passage 104b because are heat discharge refrigerant in the discharge chamber 120, it is suppressed that transmits the refrigerant sucked in (the internal space 254a of the passage forming member 254) communicating passage 104b, the temperature rise of the suction refrigerant is prevented.

また、連通路104bの内周と通路形成部材254の外周との間には隙間260が形成され、かつ、開度調整弁250は、Oリング255によって連通路104bに対して弾性支持され、開度調整弁250の通路形成部材254及び弁ハウジング253が、連通路104bと直接に接する面積を少なくすることで、通路形成部材254による断熱効果を更に高めている。 Further, the gap 260 is formed between the outer periphery of the inner periphery and the passage forming member 254 of the communication passage 104b, and the opening regulating valve 250 is elastically supported with respect to the communication passage 104b by O-ring 255, opening path forming member 254 and the valve housing 253 in degrees regulating valve 250, by reducing the area in direct contact and the communication path 104b, and further enhance the thermal insulation effect by the passage forming member 254.

また、連通路104bの内周と通路形成部材254の外周との間の隙間260と、通路形成部材254の内部空間254aとを連通させる連通孔254dを通路形成部材254に形成してあるので、冷媒回路に冷媒を封入する際に圧縮機100内の空気を排出すべく行われる真空引きにおいて、隙間260の空気が排出され易く、また、フランジ254cと吸入ポート104aとの隙間から冷媒やオイルが隙間260内に入り込んだ場合に、冷媒やオイルが内部空間254a側に抜け易くなる。 Further, a gap 260 between the outer periphery of the inner periphery and the passage forming member 254 of the communication passage 104b, since the communication hole 254d for communicating the internal space 254a of the passage forming member 254 is formed in the passage forming member 254, in vacuuming is performed so as to discharge the air in the compressor 100 when encapsulating the refrigerant in the refrigerant circuit, easily air gap 260 is discharged, the refrigerant and oil from the clearance of the flange 254c and the suction port 104a is If that intrudes into the gap 260, the refrigerant and oil is easily removed in the internal space 254a side.

次に、上記の開度調整弁250の効果を説明する。 Next, the effect of the opening control valve 250.
上記圧縮機100では、断熱部材として機能する通路形成部材254を、連通路104b(吸入通路104c)に内挿し、連通路104b(吸入通路104c)内の冷媒の温度上昇を抑制するので、温度上昇による冷媒の密度低下、引いては、圧縮機100の性能低下を防止できる。 In the compressor 100, the passage forming member 254 that functions as a heat insulating member, interpolates the communication passage 104b (suction passage 104c), so to suppress the temperature rise of the refrigerant in the communication passage 104b (suction passage 104c), the temperature rise decrease the density of the refrigerant by, pulls, can prevent performance degradation of the compressor 100.

更に、連通路104bの内周と通路形成部材254の外周との間に隙間260を設け、また、通路形成部材254を連通路104bに対してOリング255によって弾性支持したことで、通路形成部材254の断熱性能がより高まり、連通路104b(吸入通路104c)内の冷媒の温度上昇をより効果的に抑制できる。 Further, a gap 260 is provided between the outer periphery of the inner periphery and the passage forming member 254 of the communication passage 104b, also by elastically supported by the O-ring 255 a passage forming member 254 with respect to the communication passage 104b, the passage forming member 254 of the heat insulating performance is enhanced more, can be more effectively suppress the temperature rise of the refrigerant in the communication passage 104b (suction passage 104c).
また、開度調整弁250は、冷媒流量に応じて吸入通路104cの開度を調整するので、吸入圧力の脈動を低減でき、吸入圧力の脈動による異音の発生を抑制できる。 Further, the opening regulating valve 250, so adjusting the opening of the suction passage 104c in accordance with the flow rate of refrigerant, it is possible to reduce the pulsation of suction pressure, it is possible to suppress occurrence of abnormal noise due to pulsation of suction pressure.

また、通路形成部材254は、連通路104b(吸入通路104c)の断熱部材として機能とすると共に、開度調整弁250の弁体251の移動を規制する規制部254bを一体的に備え、開度調整機能の一部を担うので、断熱部材と、弁体251の移動を規制する部材とを個別に備える場合に比べて、圧縮機100の構造を簡略化でき、圧縮機100のコストアップを抑制できる。 Furthermore, the passage forming member 254, with the function as a heat insulating member of the communication path 104b (suction passage 104c), integrally includes a restricting portion 254b for restricting the movement of the valve body 251 of the opening regulating valve 250, opening since becomes a part of the adjustment function, and the heat insulating member, as compared with the case where a member that restricts movement of the valve body 251 includes individually, the structure of the compressor 100 can be simplified, suppressing an increase in cost of the compressor 100 it can.

以上、好ましい実施形態を参照して本発明の内容を具体的に説明したが、本発明の基本的技術思想及び教示に基づいて、当業者であれば、種々の変形態様を採り得ることは自明である。 Having specifically described the contents of the present invention with reference to the preferred embodiment, based on the basic technical concept and teachings of the present invention, those skilled in the art, obvious that it can take various modifications it is.
例えば、上記実施形態では、吸入通路104cの軸線は駆動軸106の軸線に略直交し、吸入通路104cはシリンダヘッド104の径方向外側から吐出室120の一部を横切るように直線状に延設されるが、吸入通路104cは吐出室120を跨ぐものであれば良く、吸入通路104cの延設方向は径方向に限定されず、また、吸入通路104cの軸線が、駆動軸106の軸線に対して傾斜していても良い。 For example, in the above embodiment, the axis of the suction passage 104c is substantially orthogonal to the axis of the drive shaft 106, extends in a straight line as the suction passage 104c crosses a part of the discharge chamber 120 from the radially outer side of the cylinder head 104 but is the intake passage 104c is as long as it straddles the discharge chamber 120, the extending direction of the suction passage 104c is not limited in the radial direction, the axial line of the suction passage 104c is, with respect to the axis of the drive shaft 106 it may be inclined Te.

また、実施形態では、通路形成部材254をポリアミド系樹脂材料で形成したが、ポリフェニレンサルファイドなどの他の樹脂材料で形成することができ、更に、例えば金属材料の表面を断熱作用のある樹脂被膜等で被覆した層構造の材料を用いて通路形成部材254を形成することもでき、本願では、前述のような層構造の材料を含めて断熱材料と称するものとする。 Further, in the embodiment, the passage forming member 254 is formed by polyamide resin material can be formed of other resin material such as polyphenylene sulfide, further, for example, the surface of the metallic material with heat insulating effect resin coating or the like in the material of the coating layer structure can be formed a passage forming member 254 using, in the present application shall be referred to as a heat insulating material including the material of the layer structure as described above.

また、実施形態では、開度調整弁250は、最小開度状態であっても全閉にならない構造としたが、開度調整弁250が最小開度状態において全閉となる構造(吸入逆止弁)としても良い。 Further, in the embodiment, the opening regulating valve 250 has been a structure that does not fully closed even minimum opening condition, structure opening regulating valve 250 is fully closed in the minimum opening condition (intake check valve) may be used.
また、通路形成部材254のフランジ254c側を連通路104bに対しOリングで弾性支持するようにすれば、更に断熱効果を高めることができる。 Further, if the flange 254c side of the passage forming member 254 so as to elastically supported by the O-ring with respect to the communication passage 104b, it is possible to further enhance the heat insulating effect.
また、圧縮機100は、電磁クラッチを備えた往復動圧縮機、クラッチレス圧縮機またモータで駆動される圧縮機であってもよい。 Further, the compressor 100 is a reciprocating compressor having an electromagnetic clutch may be a clutchless compressor also compressor driven by a motor.

100…圧縮機、101…シリンダブロック、101a…シリンダボア、102…フロントハウジング、103…バルブプレート、104…シリンダヘッド、104a…吸入ポート、104b…連通路、104c…吸入通路、105…クランク室、106…駆動軸、107…斜板、250…開度調整弁、251…弁体、252…圧縮コイルバネ、253…弁ハウジング、253a…出口孔、254…通路形成部材、254b…規制部、254c…フランジ、254d…連通孔、260…隙間 100 ... compressor, 101 ... cylinder block, 101a ... cylinder bores, 102 ... front housing, 103 ... valve plate, 104 ... cylinder head, 104a ... intake port, 104b ... communicating passage, 104c ... suction passage, 105 ... crank chamber, 106 ... drive shaft, 107 ... swash plate, 250 ... opening regulating valve, 251 ... valve, 252 ... compression coil spring, 253 ... valve housing, 253a ... outlet hole, 254 ... passage forming member, 254b ... restricting portion, 254c ... flange , 254d ... the communication hole, 260 ... gap

Claims (6)

  1. 駆動軸の軸線の延長線上に配設した吸入室、前記吸入室を囲む環状に配設した吐出室、及び、前記吐出室の径方向の外側から前記吐出室を跨いで前記吸入室にまで延設される吸入通路が形成されたシリンダヘッドと、 Suction chamber which is disposed on an extension of the axis of the drive shaft, the discharge chamber is disposed annularly surrounding the suction chamber, and, extending from the outer side in the radial direction of the discharge chamber to the suction chamber across said discharge chamber a cylinder head intake passage is formed to be set,
    前記吸入通路の開度を調整する開度調整弁と、 And opening regulating valve for adjusting an opening degree of the suction passage,
    を備えた圧縮機において、 In the compressor provided with,
    前記開度調整弁は、筒状に形成されて前記吸入通路の前記吐出室を跨ぐ部分に内挿される通路形成部材を備え、前記通路形成部材は前記シリンダヘッドの成形材料であるアルミ系材料よりも熱伝導率が低い断熱材料で形成されていることを特徴とする圧縮機。 The opening regulating valve includes a passage forming member which is inserted into the portion is formed in a cylindrical shape to straddle the discharge chamber of the suction passage, wherein the passage forming member is of aluminum-based material is a molding material of the cylinder head compressor, characterized in that the thermal conductivity is formed at a lower heat-insulating material also.
  2. 前記通路形成部材の外周と前記吸入通路の内周との間に、環状の隙間を設けたことを特徴とする請求項1記載の圧縮機。 Between the inner circumference of the suction passage and the outer periphery of the passage forming member, the compressor according to claim 1, characterized in that an annular gap.
  3. 前記通路形成部材を、前記吸入通路に対してOリングによって弾性支持したことを特徴とする請求項 2記載の圧縮機。 The passage forming member, the compressor according to claim 2, characterized in that the elastically supported by the O-ring against the suction passage.
  4. 前記環状の隙間と前記通路形成部材の内部空間とを連通する連通孔を、前記通路形成部材に設けたことを特徴とする請求項2又は3記載の圧縮機。 The communication hole for communicating the interior space of the passage forming member and the gap of said annular compressor according to claim 2 or 3, wherein the provided in the passage forming member.
  5. 前記通路形成部材は、前記吸入通路の開度を減少させる方向の弁体の移動を規制する規制部を一体的に有することを特徴とする請求項1から 4のいずれか1つに記載の圧縮機。 The passage forming member is compressed according to any one of claims 1 to 4, characterized in that it has a regulating portion for regulating the movement of the suction passage direction of the valve body to decrease the opening integrally machine.
  6. 前記通路形成部材の上流側端部が、前記吸入通路の軸方向への移動を規制されて前記吸入通路の内周壁に対し係止されることを特徴とする請求項1から5のいずれか1つに記載の圧縮機。 Upstream end of the passage forming member is any of claims 1-5, characterized in that it is locked to the inner peripheral wall of the suction passage is restricted from moving in the axial direction of the suction passage 1 the compressor according to One.
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