JP2003074728A - Differential pressure regulating valve - Google Patents
Differential pressure regulating valveInfo
- Publication number
- JP2003074728A JP2003074728A JP2001261596A JP2001261596A JP2003074728A JP 2003074728 A JP2003074728 A JP 2003074728A JP 2001261596 A JP2001261596 A JP 2001261596A JP 2001261596 A JP2001261596 A JP 2001261596A JP 2003074728 A JP2003074728 A JP 2003074728A
- Authority
- JP
- Japan
- Prior art keywords
- resin body
- small diameter
- diameter portion
- peripheral surface
- diameter part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Safety Valves (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Compressor (AREA)
- Valve Housings (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、差圧弁に関するも
のである。
【０００２】
【従来の技術】吸入弁の低流量時の自励振動により惹起
される吸入圧力の脈動を効果的に低減可能な差圧弁を備
えた容量制御型斜板式圧縮機が、特開２００１−１３６
７７６号に開示されている。当該圧縮機の縦断面図を図
３に示す。図３において、１はケーシング、２は主軸、
３はフロントハウジング、４は電磁クラッチ、５はシリ
ンダ、６はピストン、７はクランク機構、８はシリンダ
ヘッド、９は弁機構、１１は吐出孔、１２は吸入孔、１
３は吐出弁、１４は吸入弁、１５は吐出室、１６は吸入
室、１７は吸入ポート、１８はガス通路、１９は吐出ポ
ート、２１は弁室である。吸入室１６はガス通路１８と
弁室２１とを介して吸入ポート１７に連通している。差
圧弁２２がスプリング２３を介して上下動可能に弁室２
１内に配置されている。差圧弁２２はガス通路１８の面
積を増減制御する。差圧弁２２が最も下降した時にガス
通路１８の面積が最大になり、差圧弁２２が最も上昇し
た時にガス通路１８の面積が最小になる。吸入室１６
は、シリンダヘッド８に形成された連通孔２４と弁室２
１と差圧弁２２に形成された弁孔２５とを介して、吸入
ポート１７に連通している。吐出弁１３、吸入弁１４の
過剰撓みを抑制するリテーナ２６、ストッパ２７が配置
されている。
【０００３】図３の斜板式圧縮機においては、高流量時
には、吸入室１６の圧力低下量が吸入ポート１７の圧力
低下量よりも大きいので、差圧弁２２はスプリング２３
を圧縮しつつ下降し、ガス通路１８の面積が増加する。
吸入ポート１７から導入されたガスは、ガス通路１８を
通って吸入室１６へ流入する。高流量時には、吸入圧力
の脈動は小さいので、騒音は発生しない。低流量時に
は、吸入室１６と吸入ポート１７との圧力差が小さいの
で、差圧弁２２はスプリング２３の付勢力を受けて上昇
し、ガス通路１８の面積が減少する。低流量時には、吸
入ポート１７から導入されたガスの一部は、弁孔２５と
弁室２１と連通路２４とを通って吸入室１６へ流入す
る。低流量時には、吸入圧力の脈動は大きいが、吸入室
１６から連通路２４と弁室２１と弁孔２５とを通って吸
入ポート１７へ伝播する過程で減衰するので、騒音は発
生しない。
【０００４】図３の差圧弁２２は概念図であり、弁室２
１に組み込むことはできない。実際には図４に示す差圧
弁が従来使用されていた。図４の差圧弁は、有底筒状の
樹脂製ボデー３１と、大径部３２ａと小径部３２ｂとを
有し小径部３２ｂが樹脂製ボデー３１の開放端部に内嵌
合する２段構造の筒状のハウジング３２と、ハウジング
３２と樹脂製ボデー３１の底壁との間で摺動可能に樹脂
製ボデー３１に内嵌合する有天筒状の弁体３３と、弁体
３３の天井壁と樹脂製ボデー３１の底壁との間に介挿さ
れたバネ３４とを備えている。樹脂製ボデー３１の周壁
に、弁体３３の周壁によって面積が増減制御される複数
の開口３１ａが形成されるとともに、樹脂製ボデー３１
の底壁に開口３１ｂが形成されている。ハウジング大径
部３２ａの外周面に環状凸部３２ｃが形成されている。
ハウジング小径部３２ｂの弁体３３天井壁に対峙する端
部に、樹脂製ボデー３１に形成された複数の開口３１ａ
に連通する複数の切欠３２ｄが形成されている。ハウジ
ング３２は、小径部３２ｂの外周面が樹脂製ボデー３１
の開放端部の内周面に接着あるいは溶着されることによ
り、樹脂製ボデー３１に固定されている。上記構成の差
圧弁は、図４に示すように、吸入室１６と吸入ポート１
７との間に形成された室２１へ吸入ポート１７を介して
挿入され、環状凸部３２ｃがシリンダヘッド８に形成さ
れた環状溝８ａに弾性嵌合することにより、シリンダヘ
ッド８に固定される。樹脂製ボデー３１の底壁に形成さ
れた開口３１ｂは吸入室１６に連通している。
【０００５】図４の差圧弁を備える容量制御型斜板式圧
縮機にあっては、高流量時には、吸入室１６の圧力低下
量が吸入ポート１７の圧力低下量よりも大きいので、弁
体３３はスプリング３４を圧縮しつつ下降し、開口３１
ａの面積が増加する。吸入ポート１７から導入されたガ
スは、開口３１ａを通って吸入室１６へ流入する。高流
量時には、吸入圧力の脈動は小さいので、騒音は発生し
ない。低流量時には、吸入室１６と吸入ポート１７との
圧力差が小さいので、弁体３３はスプリング３４の付勢
力を受けて上昇し、開口３１ａの面積が減少する。低流
量時には、吸入ポート１７から導入されたガスの一部
は、切欠３２ｄから開口３１ａを通って吸入室１６へ流
入する。低流量時には、吸入圧力の脈動は大きいが、吸
入室１６から切欠３２ｄを通って吸入ポート１７へ伝播
する過程で減衰するので、騒音は発生しない。
【０００６】
【発明が解決しようとする課題】図４の差圧弁には、接
着又は溶着によりハウジング３２を樹脂製ボデー３１に
固定していたので、ハウジング３２と樹脂製ボデー３１
との組み付けに手間が掛かるという問題があった。本発
明は上記問題に鑑みてなされたものであり、構成部材同
士の組み付けに手間がかからない差圧弁を提供すること
を目的とする。
【０００７】
【課題を解決するための手段】上記課題を解決するため
に、本発明においては、開放端を含む大径部と底壁を含
む小径部とを有する２段構造の有底筒状の樹脂製ボデー
と、樹脂製ボデー小径部の大径部に隣接する部位に内嵌
合する筒状のハウジングと、ハウジングと樹脂製ボデー
の底壁との間で摺動可能に樹脂製ボデーの小径部に内嵌
合する有天筒状の弁体と、弁体の天井壁と樹脂製ボデー
の底壁との間に介挿されたバネとを備え、樹脂製ボデー
大径部の外周面に環状凸部が形成され、樹脂製ボデー小
径部の大径部に隣接する部位の内周面に環状溝が形成さ
れ、樹脂製ボデー小径部の周壁に弁体の周壁によって面
積が増減制御される複数の開口が形成されるとともに底
壁に開口が形成され、ハウジングの外周面に環状凸部が
形成されると共に弁体天井壁に対峙する端部に樹脂製ボ
デーの小径部に形成された複数の開口に連通する複数の
切欠が形成され、ハウジングは、外周面に形成された環
状凸部を樹脂製ボデー小径部の内周面に形成された環状
溝に弾性嵌合させて、樹脂製ボデー小径部に固定されて
いることを特徴とする差圧弁を提供する。
【０００８】本発明に係る差圧弁においては、ハウジン
グの外周面に形成した環状凸部を樹脂製ボデー小径部の
内周面に形成した環状溝に弾性嵌合させて、ハウジング
が樹脂製ボデーに固定されるので、ハウジングと樹脂製
ボデーの組み付けに手間が掛からない。樹脂製ボデーは
小径部の内周面に環状溝を有しているので、樹脂製ボデ
ーを成形する際に、ボデー内径部の型をむり抜きする必
要がある。樹脂製ボデーを、開放端を含む大径部と底壁
を含む小径部とを有する２段構造の有底筒体として、十
分な寸法のボデー押さえ部を形成したので、ボデー内径
部の型のむり抜きが可能となった。
【０００９】
【発明の実施の形態】本発明の実施例に係る差圧弁を説
明する。図１、２に示すように、本実施例に係る差圧弁
は、開放端を含む大径部４１ａと底壁を含む小径部４１
ｂとを有する２段構造の有底筒状の樹脂製ボデー４１
と、樹脂製ボデー小径部４１ｂの大径部４１ａに隣接す
る部位に内嵌合する筒状のハウジングと４２、ハウジン
グ４２と樹脂製ボデー４１の底壁との間で摺動可能に樹
脂製ボデー小径部４１ｂに内嵌合する有天筒状の弁体４
３と、弁体４３の天井壁と樹脂製ボデー４１の底壁との
間に介挿されたバネ４４とを備えている。樹脂製ボデー
大径部４１ａの外周面に環状凸部４１ｃが形成され、樹
脂製ボデー小径部４１ｂの大径部４１ａに隣接する部位
の内周面に環状溝４１ｄが形成され、樹脂製ボデー小径
部４１ｂの周壁に弁体４３の周壁によって面積が増減制
御される複数の開口４１ｅが形成され、樹脂製ボデー４
１の底壁に開口４１ｆが形成されている。ハウジング４
２の外周面に環状凸部４２ａが形成されると共に、弁体
４３天井壁に対峙する端部に、樹脂製ボデー小径部４１
ｂに形成された複数の開口４１ｅに連通する複数の切欠
４２ｂが形成されている。ハウジング４２は、外周面に
形成された環状凸部４２ａを樹脂製ボデー小径部４１ｂ
の内周面に形成された環状溝４１ｄに弾性嵌合させて、
樹脂製ボデー小径部４１ｂに固定されている。本差圧弁
は、容量制御型斜板式圧縮機の吸入室１６と吸入ポート
１７との間に形成された室２１へ吸入ポート１７を介し
て挿入され、環状凸部４１ｃがシリンダヘッド８に形成
された環状溝８ａに弾性嵌合することにより、シリンダ
ヘッド８に固定される。樹脂製ボデー４１の底壁に形成
された開口４１ｆが吸入室１６に連通している。
【００１０】本差圧弁を備える容量制御型斜板式圧縮機
にあっては、高流量時には、吸入室１６の圧力低下量が
吸入ポート１７の圧力低下量よりも大きいので、弁体４
３はスプリング４４を圧縮しつつ下降し、開口４１ｅの
面積が増加する。吸入ポート１７から導入されたガス
は、開口４１ｅを通って吸入室１６へ流入する。高流量
時には、吸入圧力の脈動は小さいので、騒音は発生しな
い。低流量時には、吸入室１６と吸入ポート１７との圧
力差が小さいので、弁体４３はスプリング４４の付勢力
を受けて上昇し、開口４１ｅの面積が減少する。低流量
時には、吸入ポート１７から導入されたガスの一部は、
切欠４２ｂから開口４１ｅを通って吸入室１６へ流入す
る。低流量時には、吸入圧力の脈動は大きいが、吸入室
１６から切欠４２ｂを通って吸入ポート１７へ伝播する
過程で減衰するので、騒音は発生しない。
【００１１】本差圧弁においては、ハウジング４２の外
周面に形成した環状凸部４２ａを樹脂製ボデー小径部４
１ｂの内周面に形成した環状溝４１ｄに弾性嵌合させ
て、ハウジング４２が樹脂製ボデー４１に固定されるの
で、ハウジング４２と樹脂製ボデー４１との組み付けに
手間が掛からない。樹脂製ボデー４１は小径部４１ｂの
内周面に環状溝４１ｄを有しているので、樹脂製ボデー
４１を成形する際に、ボデー内径部の型をむり抜きする
必要がある。樹脂製ボデー４１を、開放端を含む大径部
４１ａと底壁を含む小径部４１ｂとを有する２段構造の
有底筒体として、十分な寸法のボデー押さえ部Ｌを形成
したので、ボデー内径部の型のむり抜きが可能となっ
た。
【００１２】本発明に係る差圧弁は、斜板式圧縮機に限
らず、任意のピストン式可変容量圧縮機に適用可能であ
る。
【００１３】
【発明の効果】以上説明したごとく、本発明に係る差圧
弁においては、ハウジングの外周面に形成した環状凸部
を樹脂製ボデー小径部の内周面に形成した環状溝に弾性
嵌合させて、樹脂製ボデーに固定されるので、ハウジン
グと樹脂製ボデーの組み付けに手間が掛からない。樹脂
製ボデーは小径部の内周面に環状溝を有しているので、
樹脂製ボデーを成形する際に、ボデー内径部の型をむり
抜きする必要がある。樹脂製ボデーを、開放端を含む大
径部と底壁を含む小径部とを有する２段構造の有底筒体
として、十分な寸法のボデー押さえ部を形成したので、
ボデー内径部の型のむり抜きが可能となった。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a differential pressure valve. 2. Description of the Related Art A capacity-controlled swash plate compressor having a differential pressure valve capable of effectively reducing pulsation of suction pressure caused by self-excited vibration at a low flow rate of the suction valve is disclosed in Japanese Patent Laid-Open No. -136
No. 776. A longitudinal sectional view of the compressor is shown in FIG. In FIG. 3, 1 is a casing, 2 is a main shaft,
3 is a front housing, 4 is an electromagnetic clutch, 5 is a cylinder, 6 is a piston, 7 is a crank mechanism, 8 is a cylinder head, 9 is a valve mechanism, 11 is a discharge hole, 12 is a suction hole, 1
3 is a discharge valve, 14 is a suction valve, 15 is a discharge chamber, 16 is a suction chamber, 17 is a suction port, 18 is a gas passage, 19 is a discharge port, and 21 is a valve chamber. The suction chamber 16 communicates with the suction port 17 through a gas passage 18 and a valve chamber 21. The differential pressure valve 22 can be moved up and down via a spring 23.
1 is arranged. The differential pressure valve 22 increases or decreases the area of the gas passage 18. The area of the gas passage 18 is maximized when the differential pressure valve 22 is lowered most, and the area of the gas passage 18 is minimized when the differential pressure valve 22 is raised most. Suction chamber 16
The communication hole 24 formed in the cylinder head 8 and the valve chamber 2
1 and a valve hole 25 formed in the differential pressure valve 22 communicate with the suction port 17. A retainer 26 and a stopper 27 for suppressing excessive deflection of the discharge valve 13 and the suction valve 14 are disposed. In the swash plate compressor shown in FIG. 3, the pressure drop in the suction chamber 16 is larger than the pressure drop in the suction port 17 at a high flow rate.
, While lowering, the area of the gas passage 18 increases.
The gas introduced from the suction port 17 flows into the suction chamber 16 through the gas passage 18. At high flow rate, the pulsation of the suction pressure is small, so no noise is generated. When the flow rate is low, since the pressure difference between the suction chamber 16 and the suction port 17 is small, the differential pressure valve 22 rises due to the urging force of the spring 23 and the area of the gas passage 18 decreases. When the flow rate is low, part of the gas introduced from the suction port 17 flows into the suction chamber 16 through the valve hole 25, the valve chamber 21, and the communication passage 24. When the flow rate is low, the pulsation of the suction pressure is large, but it is attenuated in the process of propagating from the suction chamber 16 through the communication path 24, the valve chamber 21 and the valve hole 25 to the suction port 17, so that no noise is generated. The differential pressure valve 22 shown in FIG.
Cannot be incorporated into 1. Actually, a differential pressure valve shown in FIG. 4 has been conventionally used. The differential pressure valve shown in FIG. 4 has a bottomed cylindrical resin body 31, a large diameter portion 32a, and a small diameter portion 32b, and the small diameter portion 32b is fitted inside the open end of the resin body 31. A cylindrical housing 32, a ceiling-shaped valve body 33 that fits in the resin body 31 so as to be slidable between the housing 32 and the bottom wall of the resin body 31, and the ceiling of the valve body 33 A spring 34 is provided between the wall and the bottom wall of the resin body 31. A plurality of openings 31 a whose area is controlled to increase or decrease by the peripheral wall of the valve body 33 are formed on the peripheral wall of the resin body 31, and the resin body 31 is formed.
An opening 31b is formed in the bottom wall. An annular convex portion 32c is formed on the outer peripheral surface of the housing large diameter portion 32a.
A plurality of openings 31 a formed in the resin body 31 at the end of the housing small diameter portion 32 b facing the valve body 33 ceiling wall.
A plurality of cutouts 32d communicating with is formed. In the housing 32, the outer peripheral surface of the small diameter portion 32b is a resin body 31.
It is fixed to the resin body 31 by being bonded or welded to the inner peripheral surface of the open end. As shown in FIG. 4, the differential pressure valve having the above configuration includes a suction chamber 16 and a suction port 1.
7 is inserted through the suction port 17 into the chamber 21 formed between the cylinder 7 and the annular protrusion 32c is fixed to the cylinder head 8 by being elastically fitted into an annular groove 8a formed in the cylinder head 8. . An opening 31 b formed in the bottom wall of the resin body 31 communicates with the suction chamber 16. In the capacity-controlled swash plate compressor having the differential pressure valve shown in FIG. 4, the pressure drop amount in the suction chamber 16 is larger than the pressure drop amount in the suction port 17 when the flow rate is high. The spring 34 descends while compressing, and the opening 31
The area of a increases. The gas introduced from the suction port 17 flows into the suction chamber 16 through the opening 31a. At high flow rate, the pulsation of the suction pressure is small, so no noise is generated. When the flow rate is low, since the pressure difference between the suction chamber 16 and the suction port 17 is small, the valve element 33 is lifted by the urging force of the spring 34, and the area of the opening 31a is reduced. When the flow rate is low, part of the gas introduced from the suction port 17 flows into the suction chamber 16 from the notch 32d through the opening 31a. When the flow rate is low, the pulsation of the suction pressure is large, but since it attenuates in the process of propagating from the suction chamber 16 through the notch 32d to the suction port 17, no noise is generated. In the differential pressure valve shown in FIG. 4, since the housing 32 is fixed to the resin body 31 by adhesion or welding, the housing 32 and the resin body 31 are fixed.
There was a problem that it took time and effort to assemble. This invention is made | formed in view of the said problem, and it aims at providing the differential pressure | voltage valve which does not require an effort for the assembly | attachment of structural members. In order to solve the above problems, in the present invention, a bottomed cylindrical shape having a two-stage structure having a large diameter portion including an open end and a small diameter portion including a bottom wall. The resin body, a cylindrical housing that fits in the portion adjacent to the large diameter portion of the resin body small diameter portion, and the resin body slidable between the housing and the bottom wall of the resin body The outer peripheral surface of the resin-made large-diameter portion includes a dome-shaped tubular valve body that fits inside the small-diameter portion, and a spring that is interposed between the ceiling wall of the valve body and the bottom wall of the resin-made body. An annular groove is formed on the inner peripheral surface of the portion adjacent to the large diameter portion of the resin body small diameter portion, and the area is controlled to increase or decrease by the peripheral wall of the valve body on the peripheral wall of the resin body small diameter portion. Are formed in the bottom wall, and an annular protrusion is formed on the outer peripheral surface of the housing. In addition, a plurality of cutouts communicating with a plurality of openings formed in the small diameter portion of the resin body are formed at the end facing the valve body ceiling wall, and the housing is made of resin with an annular convex portion formed on the outer peripheral surface. Provided is a differential pressure valve characterized by being elastically fitted to an annular groove formed on an inner peripheral surface of a small diameter body-made part and fixed to the small-diameter part made of a resin. In the differential pressure valve according to the present invention, the annular convex portion formed on the outer peripheral surface of the housing is elastically fitted into the annular groove formed on the inner peripheral surface of the small diameter portion of the resin body so that the housing becomes the resin body. Since it is fixed, it does not take time to assemble the housing and the resin body. Since the resin body has an annular groove on the inner peripheral surface of the small diameter portion, when molding the resin body, it is necessary to peel off the mold of the inner diameter portion of the body. Since the body pressing part of a sufficient size is formed as a two-stage bottomed cylindrical body having a large-diameter part including an open end and a small-diameter part including a bottom wall, the resin body is formed with a body inner diameter part mold. Stripping is possible. DESCRIPTION OF THE PREFERRED EMBODIMENTS A differential pressure valve according to an embodiment of the present invention will be described. As shown in FIGS. 1 and 2, the differential pressure valve according to this embodiment includes a large diameter portion 41a including an open end and a small diameter portion 41 including a bottom wall.
b. A bottomed tubular resin body 41 having a two-stage structure
And a cylindrical housing 42 that fits in a portion adjacent to the large-diameter portion 41a of the resin-made small-diameter portion 41b, and the resin-made body slidable between the housing 42 and the bottom wall of the resin-made body 41. A cylinder-shaped valve body 4 fitted inside the small-diameter portion 41b.
3, and a spring 44 interposed between the ceiling wall of the valve body 43 and the bottom wall of the resin body 41. An annular convex portion 41c is formed on the outer peripheral surface of the resin body large diameter portion 41a, and an annular groove 41d is formed on the inner peripheral surface of the portion adjacent to the large diameter portion 41a of the resin body small diameter portion 41b. A plurality of openings 41e whose area is controlled to increase or decrease by the peripheral wall of the valve body 43 are formed in the peripheral wall of the portion 41b, and the resin body 4
An opening 41 f is formed in the bottom wall of 1. Housing 4
An annular convex portion 42 a is formed on the outer peripheral surface of the valve body 43, and the resin body small-diameter portion 41 is formed at an end portion facing the ceiling wall of the valve body 43.
A plurality of notches 42b communicating with the plurality of openings 41e formed in b are formed. The housing 42 has an annular convex portion 42a formed on the outer peripheral surface thereof and a resin body small diameter portion 41b.
Are elastically fitted into an annular groove 41d formed on the inner peripheral surface of
The resin body is fixed to the small diameter portion 41b. The differential pressure valve is inserted into the chamber 21 formed between the suction chamber 16 and the suction port 17 of the capacity-controlled swash plate compressor via the suction port 17, and an annular convex portion 41 c is formed in the cylinder head 8. The cylinder head 8 is fixed by being elastically fitted in the annular groove 8a. An opening 41 f formed in the bottom wall of the resin body 41 communicates with the suction chamber 16. In the capacity control type swash plate compressor having this differential pressure valve, the pressure drop in the suction chamber 16 is larger than the pressure drop in the suction port 17 at a high flow rate.
3 descends while compressing the spring 44, and the area of the opening 41e increases. The gas introduced from the suction port 17 flows into the suction chamber 16 through the opening 41e. At high flow rate, the pulsation of the suction pressure is small, so no noise is generated. When the flow rate is low, since the pressure difference between the suction chamber 16 and the suction port 17 is small, the valve body 43 is lifted by the urging force of the spring 44, and the area of the opening 41e is reduced. When the flow rate is low, part of the gas introduced from the suction port 17 is
It flows into the suction chamber 16 from the notch 42b through the opening 41e. When the flow rate is low, the pulsation of the suction pressure is large, but since it attenuates in the process of propagating from the suction chamber 16 through the notch 42b to the suction port 17, no noise is generated. In the present differential pressure valve, an annular convex portion 42a formed on the outer peripheral surface of the housing 42 is provided with a resin body small diameter portion 4.
Since the housing 42 is fixed to the resin body 41 by being elastically fitted to the annular groove 41d formed on the inner peripheral surface of 1b, it does not take time to assemble the housing 42 and the resin body 41. Since the resin body 41 has an annular groove 41d on the inner peripheral surface of the small-diameter portion 41b, when molding the resin body 41, it is necessary to peel off the mold of the inner diameter portion of the body. Since the body pressing portion L having a sufficient size is formed as a two-stage bottomed cylindrical body having a large-diameter portion 41a including an open end and a small-diameter portion 41b including a bottom wall, the resin body 41 is formed. The mold of the part can be removed. The differential pressure valve according to the present invention is not limited to a swash plate type compressor, but can be applied to any piston type variable displacement compressor. As described above, in the differential pressure valve according to the present invention, the annular convex portion formed on the outer peripheral surface of the housing is elastically fitted into the annular groove formed on the inner peripheral surface of the resin body small diameter portion. In addition, since it is fixed to the resin body, it does not take time to assemble the housing and the resin body. Since the resin body has an annular groove on the inner peripheral surface of the small diameter part,
When molding the resin body, it is necessary to peel off the mold at the inner diameter part of the body. Since the resin body is formed as a two-stage bottomed cylindrical body having a large-diameter portion including an open end and a small-diameter portion including a bottom wall, a body pressing portion having a sufficient size is formed.
The mold on the inner diameter of the body can be removed.
【図面の簡単な説明】
【図１】本発明の実施例に係る差圧弁の断面図である。
【図２】本発明の実施例に係る差圧弁の分解斜視図であ
る。
【図３】差圧弁を備える容量制御型斜板式圧縮機の断面
図である。
【図４】従来構造の差圧弁の断面図である。
【符号の説明】
１６ 吸入室
１７ 吸入ポート
２１ 弁室
３１、４１ 樹脂製ボデー
３２、４２ ハウジング
３３、４３ 弁体
３４、４４ バネBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a differential pressure valve according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a differential pressure valve according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a capacity-controlled swash plate compressor including a differential pressure valve. FIG. 4 is a sectional view of a differential pressure valve having a conventional structure. [Description of Symbols] 16 Suction chamber 17 Suction port 21 Valve chambers 31, 41 Resin body 32, 42 Housing 33, 43 Valve body 34, 44 Spring
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高井 和彦 群馬県伊勢崎市寿町20番地 サンデン株式 会社内 (72)発明者 塚越 正義 群馬県伊勢崎市寿町20番地 サンデン株式 会社内 (72)発明者 春日井 清隆 岐阜県大垣市久徳町100番地 太平洋工業 株式会社内 Ｆターム(参考） 3H051 AA01 AA03 BB02 BB03 CC11 DD07 FF15 3H076 AA06 BB40 BB41 BB45 CC43 CC92 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kazuhiko Takai Sanden Stock, 20 Kotobuki-cho, Isesaki-shi, Gunma In the company (72) Inventor Masayoshi Tsukakoshi Sanden Stock, 20 Kotobuki-cho, Isesaki-shi, Gunma In the company (72) Inventor Kiyotaka Kasugai 100 Kutoku-cho, Ogaki-shi, Gifu Pref. Incorporated F-term (reference) 3H051 AA01 AA03 BB02 BB03 CC11 DD07 FF15 3H076 AA06 BB40 BB41 BB45 CC43 CC92
Claims (1)
とを有する２段構造の有底筒状の樹脂製ボデーと、樹脂
製ボデー小径部の大径部に隣接する部位に内嵌合する筒
状のハウジングと、ハウジングと樹脂製ボデーの底壁と
の間で摺動可能に樹脂製ボデーの小径部に内嵌合する有
天筒状の弁体と、弁体の天井壁と樹脂製ボデーの底壁と
の間に介挿されたバネとを備え、樹脂製ボデー大径部の
外周面に環状凸部が形成され、樹脂製ボデー小径部の大
径部に隣接する部位の内周面に環状溝が形成され、樹脂
製ボデー小径部の周壁に弁体の周壁によって面積が増減
制御される複数の開口が形成されるとともに底壁に開口
が形成され、ハウジングの外周面に環状凸部が形成され
ると共に弁体天井壁に対峙する端部に樹脂製ボデーの小
径部に形成された複数の開口に連通する複数の切欠が形
成され、ハウジングは、外周面に形成された環状凸部を
樹脂製ボデー小径部の内周面に形成された環状溝に弾性
嵌合させて、樹脂製ボデー小径部に固定されていること
を特徴とする差圧弁。What is claimed is: 1. A bottomed cylindrical resin body having a two-stage structure having a large diameter portion including an open end and a small diameter portion including a bottom wall; and a large diameter of the resin body small diameter portion. A cylindrical housing that is internally fitted in a portion adjacent to the portion, and a hollow cylindrical valve body that is internally fitted to a small diameter portion of the resin body slidably between the housing and the bottom wall of the resin body And a spring interposed between the ceiling wall of the valve body and the bottom wall of the resin body, an annular convex portion is formed on the outer peripheral surface of the resin body large diameter portion, and the resin body small diameter portion An annular groove is formed in the inner peripheral surface of the portion adjacent to the large diameter portion, and a plurality of openings whose area is controlled to increase or decrease by the peripheral wall of the valve body are formed in the peripheral wall of the resin body small diameter portion, and the bottom wall has openings. An annular convex portion is formed on the outer peripheral surface of the housing, and a resin body is formed on the end facing the valve body ceiling wall. A plurality of notches communicating with a plurality of openings formed in the diameter portion are formed, and the housing is elastically fitted with an annular convex portion formed on the outer peripheral surface in an annular groove formed on the inner peripheral surface of the resin body small diameter portion. A differential pressure valve characterized by being fixed to a resin body small diameter portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001261596A JP3964641B2 (en) | 2001-08-30 | 2001-08-30 | Differential pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001261596A JP3964641B2 (en) | 2001-08-30 | 2001-08-30 | Differential pressure valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003074728A true JP2003074728A (en) | 2003-03-12 |
| JP3964641B2 JP3964641B2 (en) | 2007-08-22 |
Family
ID=19088615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001261596A Expired - Fee Related JP3964641B2 (en) | 2001-08-30 | 2001-08-30 | Differential pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3964641B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007303409A (en) * | 2006-05-12 | 2007-11-22 | Toyota Industries Corp | Suction throttle valve in variable displacement compressor |
| JP2008196465A (en) * | 2007-02-16 | 2008-08-28 | Toyota Industries Corp | Suction throttle valve for variable displacement compressor |
| US7648346B2 (en) | 2004-04-28 | 2010-01-19 | Kabushiki Kaisha Toyota Jidoshokki | Variable displacement compressor |
| US7651321B2 (en) | 2005-01-27 | 2010-01-26 | Kabushiki Kaisha Toyota Jidoshokki | Variable displacement compressor |
| DE102006005535B4 (en) * | 2005-02-07 | 2013-11-21 | Sanden Corp. | Opening control valve |
| KR101607711B1 (en) | 2009-11-25 | 2016-03-30 | 한온시스템 주식회사 | Variable displacement swash plate type compressor |
| JP2021148092A (en) * | 2020-03-23 | 2021-09-27 | 株式会社デンソー | Working fluid control valve and valve timing adjusting device |
-
2001
- 2001-08-30 JP JP2001261596A patent/JP3964641B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7648346B2 (en) | 2004-04-28 | 2010-01-19 | Kabushiki Kaisha Toyota Jidoshokki | Variable displacement compressor |
| US7651321B2 (en) | 2005-01-27 | 2010-01-26 | Kabushiki Kaisha Toyota Jidoshokki | Variable displacement compressor |
| DE102006005535B4 (en) * | 2005-02-07 | 2013-11-21 | Sanden Corp. | Opening control valve |
| JP2007303409A (en) * | 2006-05-12 | 2007-11-22 | Toyota Industries Corp | Suction throttle valve in variable displacement compressor |
| JP4640253B2 (en) * | 2006-05-12 | 2011-03-02 | 株式会社豊田自動織機 | Suction throttle valve in variable capacity compressor |
| JP2008196465A (en) * | 2007-02-16 | 2008-08-28 | Toyota Industries Corp | Suction throttle valve for variable displacement compressor |
| JP4640351B2 (en) * | 2007-02-16 | 2011-03-02 | 株式会社豊田自動織機 | Suction throttle valve for variable displacement compressor |
| KR101607711B1 (en) | 2009-11-25 | 2016-03-30 | 한온시스템 주식회사 | Variable displacement swash plate type compressor |
| JP2021148092A (en) * | 2020-03-23 | 2021-09-27 | 株式会社デンソー | Working fluid control valve and valve timing adjusting device |
| WO2021193197A1 (en) * | 2020-03-23 | 2021-09-30 | 株式会社デンソー | Hydraulic oil control valve and valve timing adjuster |
| JP7192821B2 (en) | 2020-03-23 | 2022-12-20 | 株式会社デンソー | Hydraulic oil control valve and valve timing adjustment device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3964641B2 (en) | 2007-08-22 |
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