JP2008010476A - Pressure valve for capacitor - Google Patents
Pressure valve for capacitor Download PDFInfo
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- JP2008010476A JP2008010476A JP2006176514A JP2006176514A JP2008010476A JP 2008010476 A JP2008010476 A JP 2008010476A JP 2006176514 A JP2006176514 A JP 2006176514A JP 2006176514 A JP2006176514 A JP 2006176514A JP 2008010476 A JP2008010476 A JP 2008010476A
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- pressure
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- 239000003990 capacitor Substances 0.000 title claims abstract description 67
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 229920001971 elastomer Polymers 0.000 claims abstract description 8
- 239000000806 elastomer Substances 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- 229920002379 silicone rubber Polymers 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229920006389 polyphenyl polymer Polymers 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Abstract
Description
本発明は、コンデンサもしくはキャパシタ等の密封容器の封口板に設けられ、密封容器内の圧力が、所定の圧力を上回ったときに、圧力弁を開放して密封容器の破裂を防ぐコンデンサ用圧力弁に関するものである。 The present invention provides a pressure valve for a capacitor that is provided on a sealing plate of a sealed container such as a capacitor or a capacitor and prevents the burst of the sealed container by opening the pressure valve when the pressure in the sealed container exceeds a predetermined pressure. It is about.
コンデンサ用圧力弁、特に、アルミニウム電解コンデンサ用圧力弁は、逆電圧、過電圧、過電流あるいは、これらに伴う絶縁破壊等で発生した大量のガスを圧力弁の弁膜の破壊によりケース外部に逃がすことにより、コンデンサ自体の破裂を阻止する機能を有している。
コンデンサ用圧力弁は、従来、図５のように、コンデンサの封口板８に圧力弁用貫通穴を設け、コンデンサ内部に開口していて開口端部の外周上には鍔部を設けた合成ゴムの圧力弁用支持体１を、下側（コンデンサ内部側）からその貫通穴に差し込んだ構造になっている。
また、コンデンサの封口板への取り付け作業がしやすいように、閉口端部の外周上には鍔部を設け、開口端部の外周上に肉厚部を設けた合成ゴムの圧力弁用支持体を、封口板の上側（コンデンサ外側）からその貫通穴に差し込んだ構造になっている（たとえば、実開昭５７−１９７６３５号）。
Capacitor pressure valves, especially aluminum electrolytic capacitor pressure valves, are designed to release a large amount of gas generated by reverse voltage, overvoltage, overcurrent, or dielectric breakdown associated with them to the outside of the case by breaking the valve membrane of the pressure valve. The capacitor has a function of preventing the capacitor itself from bursting.
Conventionally, as shown in FIG. 5, the capacitor pressure valve is a synthetic rubber provided with a pressure valve through-hole in the
Also, a synthetic rubber pressure valve support body is provided with a flange on the outer periphery of the closed end and a thick portion on the outer periphery of the open end so that the capacitor can be easily attached to the sealing plate. Is inserted into the through-hole from the upper side (outside of the capacitor) of the sealing plate (for example, Japanese Utility Model Publication No. 57-197635).
アルミニウム電解コンデンサは、有限寿命であり、寿命形態を大別すると
（Ａ）静電容量減少、ｔａｎδ増加などによる電気的特性寿命
（Ｂ）圧力弁開放作動による寿命
となる。
An aluminum electrolytic capacitor has a finite lifetime, and can be broadly classified into (A) electrical characteristic lifetime due to capacitance decrease, tan δ increase, etc. (B) lifetime due to pressure valve opening operation.
軽負荷時での寿命を想定する場合、実使用条件の多くは周囲温度６０℃程度以下、印加電圧＜定格電圧×０．８程度あり、本使用状態での寿命は前記寿命形態の（Ａ）である。 電気的特性寿命は、電解液の磨耗によるものであり、これは電解液蒸発とファラデー反応による電解液分解に分けられる。 後者のファラデー反応は漏れ電流によるものであり、漏れ電流は軽負荷となる程低下するので軽負荷での寿命は電解液蒸発に支配される。 従って、軽負荷では気密性が高いコンデンサが必要である。 Assuming the life under light load, most of the actual usage conditions are ambient temperature of about 60 ° C or less, applied voltage <rated voltage × 0.8, and the life in this usage state is the same as that of the above life form (A) It is. Electrical property life is due to electrolyte wear, which can be divided into electrolyte evaporation and electrolyte decomposition by Faraday reaction. The latter Faraday reaction is due to leakage current, and the leakage current decreases as the load becomes lighter, so the life at light load is governed by the evaporation of the electrolyte. Therefore, a capacitor with high airtightness is required at light loads.
定格負荷付近での寿命を想定する場合、定格負荷付近では、漏れ電流が大きい為、ファラデー反応が支配的となる。 ファラデー反応では電解液が電気分解され水素等のガスが発生する。 コンデンサは完全な密封状態ではないのでガス発生速度が遅い場合、スローリークとのバランスにてコンデンサ内は危険な圧力に達しない。 しかし定格負荷付近では、漏れ電流が大きくファラデー反応が活発である為、ガス発生速度が速く内圧が圧力弁作動圧力に達すれば圧力弁が作動する。 即ち定格負荷付近での寿命は、前記寿命形態の（Ａ）又は（Ｂ）であるが、（Ｂ）の場合、電気的特性寿命を全うしておらず内圧が除去できれば長寿命化可能である。 従って、定格負荷付近では、内圧増加に応じ適当なスローリークが必要である。 When assuming the life near the rated load, the Faraday reaction becomes dominant because the leakage current is large near the rated load. In the Faraday reaction, the electrolyte is electrolyzed to generate a gas such as hydrogen. Since the capacitor is not completely sealed, if the gas generation rate is slow, the inside of the capacitor will not reach a dangerous pressure due to the balance with the slow leak. However, near the rated load, the leakage current is large and the Faraday reaction is active, so that the pressure valve is activated when the gas generation rate is fast and the internal pressure reaches the pressure valve operating pressure. That is, the life in the vicinity of the rated load is (A) or (B) in the above-mentioned life form, but in the case of (B), if the internal pressure can be removed without completing the electrical characteristic life, the life can be extended. . Therefore, in the vicinity of the rated load, an appropriate slow leak is necessary as the internal pressure increases.
異常時での寿命を想定した場合、過電圧などの過負荷では、急激なファラデー反応や、ショートによってケース内が高圧力となり爆発に至る危険がある。 この為にアルミ電解コンデンサには圧力弁が設けられている。 Assuming a life under abnormal conditions, an overload such as overvoltage may cause an explosion due to a rapid Faraday reaction or short-circuit due to high pressure inside the case. For this purpose, the aluminum electrolytic capacitor is provided with a pressure valve.
以上を整理すると、
（１）内圧が電解液蒸発程度の低圧力の場合：電解液蒸発防止が必要であり気密性が高い必要がある。
（２）ファラデー反応が活発であり内圧増加速度が速い場合：適当なスローリークが必要
（３）急激な内圧増加（異常時）：速やかな内圧除去が必要
となる。
Organizing the above,
(1) When the internal pressure is as low as the electrolyte evaporation: It is necessary to prevent the electrolyte evaporation and to have high airtightness.
(2) When the Faraday reaction is active and the internal pressure increase rate is fast: an appropriate slow leak is required. (3) Rapid internal pressure increase (when abnormal): Rapid internal pressure removal is required.
上記の課題を解決するために、コンデンサの封口板に設けた、圧力弁用貫通穴と前記貫通穴に差し込まれる圧力弁用支持体とを備えるコンデンサ用圧力弁において、前記圧力弁用支持体は、前記コンデンサ内部に開口している円筒体のエラストマーで、中央の弁胴部と、閉口端部の外周上には鍔部と、開口端部の外周上には連続または間欠的な肉厚部とを有し、前記鍔部と前記肉厚部で前記封口板を挟み込むことと、前記閉口端部の端面には薄肉部を設けることと、前記肉厚部または前記肉厚部側の前記弁胴部から始まって、前記弁胴部の外表面の、前記圧力弁用貫通穴軸方向の途中まで伸びる一つまたは複数の溝部を設けるコンデンサ用圧力弁を提供するものである。
また、コンデンサの封口板に設けた、圧力弁用貫通穴と前記貫通穴に差し込まれる圧力弁用支持体とを備えるコンデンサ用圧力弁において、前記圧力弁用支持体は、前記コンデンサ内部に開口している円筒体のエラストマーで、中央の弁胴部と、閉口端部の外周上には鍔部と、開口端部の外周上には連続または間欠的な肉厚部とを有し、前記鍔部と前記肉厚部で前記封口板を挟み込むことと、前記閉口端部の端面には薄肉部を設けることと、前記弁胴部は段差構造であって、その肉厚部側は圧力弁用貫通穴径より小径でかつ、前記圧力弁用貫通穴には、前記圧力弁用貫通穴軸方向の、前記鍔部と前記弁胴部の境界から始まって前記弁胴部の段差手前途中まで伸びる一つまたは複数の溝部を設けることと、を特徴とするコンデンサ用圧力弁を提供するものである。
また、前記複数の溝部は、それぞれ長さまたは溝断面積が異なることを特徴とするコンデンサ用圧力弁を提供するものである。
また、前記圧力弁用貫通穴には、断面径が異なる断差部を設けることを特徴とするコンデンサ用圧力弁を提供するものである。
In order to solve the above-described problem, in the pressure valve for a capacitor, which is provided on a sealing plate of the capacitor and includes a pressure valve through hole and a pressure valve support inserted into the through hole, the pressure valve support is A cylindrical elastomer opening inside the capacitor, a central valve body, a flange on the outer periphery of the closed end, and a continuous or intermittent thick part on the outer periphery of the open end The sealing plate is sandwiched between the flange portion and the thick portion, a thin portion is provided on the end surface of the closed end portion, and the valve on the thick portion or the thick portion side There is provided a pressure valve for a capacitor provided with one or a plurality of groove portions starting from the body portion and extending partway along the axial direction of the pressure valve through hole on the outer surface of the valve body portion.
Further, in the capacitor pressure valve provided on the capacitor sealing plate and including the pressure valve through hole and the pressure valve support inserted into the through hole, the pressure valve support opens to the inside of the capacitor. A cylindrical elastomer having a central valve body, a flange on the outer periphery of the closed end, and a continuous or intermittent thick portion on the outer periphery of the open end; The sealing plate is sandwiched between the thick part and the thick part, a thin part is provided on the end face of the closed end part, and the valve body part is a step structure, and the thick part side is for a pressure valve. The diameter of the pressure valve is smaller than the diameter of the through hole, and the pressure valve through hole extends in the axial direction of the pressure valve through hole from the boundary between the flange portion and the valve body portion to the middle of the valve body portion before the step. Providing a pressure valve for a capacitor characterized by providing one or a plurality of grooves. It is intended to.
The plurality of groove portions may provide a pressure valve for a capacitor, wherein each of the groove portions has a different length or groove cross-sectional area.
Further, the present invention provides a capacitor pressure valve, wherein the pressure valve through-hole is provided with a gap portion having a different cross-sectional diameter.
ケース内圧力の昇圧が急激な場合、圧力弁用支持体の閉口端部の端面に設けた薄肉部が破れ、コンデンサの破裂を防止する従来の圧力弁の機能のほかに、ケース内圧力の昇圧が速い場合、内圧増加による圧力弁の、弁胴部の長さ方向の伸び変形で、ガスをスローリークさせ内部圧力を解除させる。また、圧力弁用支持体が、エラストマーでできていて、封口板を挟み込む構造なので、スローリークさせ内部圧力を解除後は、圧力弁の、弁胴部の長さ方向の伸び変形が収縮して戻り、コンデンサの気密性を復帰できるので、コンデンサの長寿命化がはかれる。
弁胴部の長さ方向の伸び変形で、ガスをスローリークさせ方法として、弁胴部に設けた圧力弁用貫通穴軸方向に伸びる溝部が、コンデンサの封口板の外側面から外に出ることにより、または、圧力弁用貫通穴に設けた圧力弁用貫通穴軸方向に伸びる溝部まで、弁胴部の段差の小径部分がより伸びることにより達せられる。
また、長さまたは溝断面積が異なる複数の溝部を設けることにより、内部圧力の度合いに応じて迅速にガスをリークさせ内部圧力を解除させることができる。
また、圧力弁用貫通穴に断面径が異なる断部を設けることにより、圧力弁用貫通穴の長さに関係なく、つまり封口板の厚さに関係なく、防爆機能を設計することができる。
When the pressure inside the case is suddenly increased, the thin wall provided on the end face of the closed end of the pressure valve support breaks, and in addition to the function of the conventional pressure valve that prevents the capacitor from bursting, the pressure inside the case is increased. When the pressure is fast, the internal pressure is released by slow leakage of the gas due to the longitudinal deformation of the pressure body of the pressure valve due to the increase in internal pressure. In addition, since the pressure valve support is made of elastomer and sandwiches the sealing plate, after the internal pressure is released by slow leak, the expansion deformation of the pressure valve in the length direction of the valve body shrinks. Since the airtightness of the capacitor can be restored, the life of the capacitor can be extended.
As a method of slow-leaking the gas by elongating deformation in the length direction of the valve body, a groove extending in the axial direction of the pressure valve through hole provided in the valve body protrudes from the outer surface of the capacitor sealing plate. Or by extending the small diameter portion of the step of the valve body part further to the groove part extending in the axial direction of the pressure valve through hole provided in the pressure valve through hole.
In addition, by providing a plurality of groove portions having different lengths or groove cross-sectional areas, it is possible to quickly leak gas and release the internal pressure according to the degree of internal pressure.
Further, by providing the pressure valve through-holes with different cross-sectional diameters, an explosion-proof function can be designed regardless of the length of the pressure valve through-holes, that is, regardless of the thickness of the sealing plate.
コンデンサ用圧力弁は、コンデンサの封口板に設けていて、圧力弁用貫通穴と貫通穴に差し込まれる圧力弁用支持体からなっている。この圧力弁は、キャパシタ等の密封容器にも使用できる。
本発明に述べる封口板とは、コンデンサもしくはキャパシタ等の素子を収容する容器を密閉するもので、具体的には、フェノールやポリフェニルサルファイドなどの成形体からなり、封口板の表面から裏面（コンデンサ内部面）まで貫通する一箇所程度の圧力弁用貫通穴や外部電極用の引出電極を設ける。
本発明に述べる圧力弁用貫通穴とは、コンデンサもしくはキャパシタ等の容器内の内圧が上昇した場合のリークまたは開放させるための上記封口板に設けた貫通穴で、圧力弁用支持体と呼ばれる別部材をこの貫通穴に設けて圧力弁作用を行う。貫通穴の形状は、円柱状特で、圧力弁用支持体の挿入向きを限定する必要がない。
本発明に述べる圧力弁用支持体とは、圧力による弁作用をするための支持体で、シリコンゴム、ブチルゴムなどのエラストマーからなる。その形状は、コンデンサ内部に開口している円筒体からなり、中央の弁胴部と、閉口端部の外周上には鍔部と、開口端部の外周上には連続または間欠的な肉厚部とからなっている。閉口端部の端面には薄肉部を設ける。
本発明に述べる円筒体とは、断面が円径の筒形状からなり、コンデンサ内部に開口し、コンデンサ外部には閉口した端部を設けている。
本発明に述べる鍔部とは、前記圧力弁用支持体の閉口端部の外周上に設け、円板状であり、コンデンサ外面側の封口板側と接触している。気密性の点から面で接触していることが好ましい。
本発明に述べる弁胴部とは、前記圧力弁用支持体の中央部分で、断面が円径の筒形状からなり、外径が前記圧力弁用貫通穴の径と同じ程度であるが、コンデンサの内圧が上昇した場合、円筒体側面は、前記圧力弁用貫通穴の側面を圧接する。
本発明に述べる肉厚部とは、圧力弁用支持体が変形して圧力弁用貫通穴を通過し得る厚さで、ドーナツ状の連続体のほか、前記開口端部の外周上に間欠的な突起を複数設けたものである。
本発明に述べる薄肉部とは、異常時での急激な内圧上昇では、そこが選択的に破れ、防爆を防止するためのもので、前記圧力弁用支持体の閉口端部の端面に設ける。
本発明に述べる溝部とは、圧力弁用支持体または圧力弁用貫通穴に設けるもので、全体形状から見て幅の狭い形状で、圧力弁用支持体または圧力弁用貫通穴軸方向に伸びる。通過するガスの流量が安定するように溝部の形状は、防爆弁用支持体の変形により溝がつぶれないように、防爆弁用支持体に設ける場合は、深さより幅のある形状にするのが好ましいし、圧力弁用貫通穴に設ける場合は、幅より深さある形状にするのが好ましい。
以下、本発明の実施の形態を図面に基づいて説明する。
図１（ａ）は、コンデンサの封口板に設けた圧力弁用貫通穴に圧力弁用支持体差し込んだ状態の断面図を示している。図１（ｂ）は、圧力弁用支持体に、溝部を設けた一例の斜視図を示している。
１は、圧力弁用支持体で、シリコンゴム、ブチルゴムなどのエラストマーからなる。その形状は、コンデンサ内部に開口している円筒体からなり、中央の弁胴部２と、閉口端部３の外周上には鍔部４と、開口端部５の外周上には連続または間欠的な肉厚部６とからなっている。
また、閉口端部３の端面には薄肉部７を設ける。異常時での急激な内圧上昇では、薄肉部７が破れ、防爆を防止する。
８は、封口板で、フェノールやポリフェニルサルファイドなどの成型体からなり、封口板の表面から裏面（コンデンサ内部面）まで貫通する一箇所程度の圧力弁用貫通穴９を設ける。圧力弁用貫通穴９の穴形は、圧力弁用支持体１と接する部分の外形と同形状からなっている。
鍔部４と肉厚部６とで封口板８を挟み込むことでコンデンサの気密性をもたせている。気密性は、鍔部４または弁胴部２と、封口板８の接触している部分でもたせている。
１０は、圧力弁用支持体に設けた溝部で、圧力弁用支持体１の弁胴部２の外表面または弁胴部２の外表面と肉厚部６部分の、肉厚部６のほうから始まって弁胴部２の途中まで、圧力弁用貫通穴軸面方向に、一つまたは複数設ける。
弁胴部２に設けた圧力弁用貫通穴軸方向に伸びる溝部１０が、弁胴部２の長さ方向の伸び変形で、コンデンサの封口板８の外側面から外に出ることにより、ガスがスローリークする。
The capacitor pressure valve is provided on a capacitor sealing plate, and includes a pressure valve through hole and a pressure valve support inserted into the through hole. This pressure valve can also be used in a sealed container such as a capacitor.
The sealing plate described in the present invention is for sealing a capacitor or a container that accommodates an element such as a capacitor. Specifically, the sealing plate is formed of a molded body such as phenol or polyphenyl sulfide, and the sealing plate has a back surface (capacitor). Provide a pressure valve through-hole and a lead-out electrode for the external electrode that penetrates to the inner surface.
The through hole for a pressure valve described in the present invention is a through hole provided in the sealing plate for leaking or opening when the internal pressure in a container such as a capacitor or a capacitor increases, and is referred to as a support for a pressure valve. A member is provided in the through hole to perform a pressure valve action. The shape of the through hole is a cylindrical shape, and there is no need to limit the insertion direction of the support for the pressure valve.
The support for a pressure valve described in the present invention is a support for performing a valve action by pressure, and is made of an elastomer such as silicon rubber or butyl rubber. Its shape consists of a cylindrical body that opens inside the capacitor, with a central valve body, a flange on the outer periphery of the closed end, and a continuous or intermittent wall thickness on the outer periphery of the open end. It consists of parts. A thin portion is provided on the end face of the closed end.
The cylindrical body described in the present invention has a cylindrical shape with a circular cross section, and has an opening inside the capacitor and a closed end outside the capacitor.
The flange described in the present invention is provided on the outer periphery of the closed end portion of the pressure valve support body, has a disk shape, and is in contact with the sealing plate side on the capacitor outer surface side. In terms of airtightness, it is preferable that the contact is made on the surface.
The valve body described in the present invention is a central portion of the pressure valve support body, and has a cylindrical shape with a circular cross section. The outer diameter is the same as the diameter of the pressure valve through hole. When the internal pressure increases, the side surface of the cylindrical body presses the side surface of the pressure valve through hole.
The thick portion described in the present invention is a thickness that allows the pressure valve support to be deformed and pass through the pressure valve through hole. In addition to the donut-shaped continuous body, intermittently on the outer periphery of the opening end. A plurality of projections are provided.
The thin-walled portion described in the present invention is for the purpose of preventing the explosion when the internal pressure is suddenly increased at the time of abnormality, and is provided on the end face of the closed end of the pressure valve support.
The groove described in the present invention is provided in the pressure valve support body or the pressure valve through hole, and has a narrow shape as viewed from the overall shape, and extends in the axial direction of the pressure valve support body or the pressure valve through hole. . In order to stabilize the flow rate of the passing gas, the shape of the groove part should be wider than the depth when it is provided on the explosion-proof valve support so that the groove is not crushed by deformation of the explosion-proof valve support. In the case of being provided in the through hole for the pressure valve, it is preferable to make the shape deeper than the width.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A shows a cross-sectional view of a state in which a pressure valve support is inserted into a pressure valve through hole provided in a capacitor sealing plate. FIG.1 (b) has shown the perspective view of an example which provided the groove part in the support body for pressure valves.
Further, a
The sealing
When the
図２は、溝部を圧力弁用貫通穴側に設けた、別の本願発明のコンデンサ用圧力弁を示している。
図２（ａ）は、コンデンサの封口板に設けた圧力弁用貫通穴に圧力弁用支持体差し込んだ状態の断面図を示している。図２（ｂ）は、圧力弁用支持体を、圧力弁用貫通穴差し込む前の一例の斜視図を示している。
弁胴部２は、肉厚部６側が圧力弁用貫通穴径より小径の段差構造で、圧力弁用貫通穴には、圧力弁用貫通穴軸方向の、鍔部４と弁胴部２の境界から始まって弁胴部の段差１２手前途中まで伸びる一つまたは複数の溝部を設ける。また、肉厚部６上面にも溝状の隙間も設ける。
このことにより、コンデンサの内圧が上昇した場合、弁胴部２が上に伸び変形し、段差１２が溝部１０以上に達すると、ガスがスローリークする。
FIG. 2 shows another condenser pressure valve of the present invention in which a groove is provided on the pressure valve through hole side.
FIG. 2A shows a cross-sectional view of the pressure valve support inserted into the pressure valve through hole provided in the sealing plate of the capacitor. FIG. 2B shows a perspective view of an example before the pressure valve support is inserted into the pressure valve through hole.
The
As a result, when the internal pressure of the capacitor increases, the
図３は、溝部１０を複数設けた場合の一例を示している。
溝部１０ａは、長く細い溝で、溝部１０ｂは、溝部１０ａより短く太い溝を示している。この構造により、コンデンサの内圧が上昇して、圧力弁用支持体１の弁胴部２が図２では上方に伸びた場合、まず、溝部１０ａの上部先端が封口板８の外側面から出てガスをリークさせ内部圧力を解除させようとするが、それでもコンデンサの内圧が上昇した場合、弁胴部２がさらに上方に伸び、溝部１０ｂの上部先端が封口板８の外側面から出てガスをより多くより早くリークさせ内部圧力を解除させる。
FIG. 3 shows an example in which a plurality of
The
図４は、本願発明の、別のコンデンサ用圧力弁の断面図を示している。１１は断部で、そこで圧力弁用貫通穴は、断面径が異なる。断部１１は、一つ設けてもかまわないが、複数設けてもかまわない。複数設けると、ガス圧によりガスの流量を調節することができる。
FIG. 4 shows a sectional view of another condenser pressure valve of the present invention.
１…圧力弁用支持体、２…弁胴部、３…閉口端部、４…鍔部、５…開口端部、６…肉厚部、７…薄肉部、８…封口板、９…圧力弁用貫通穴、１０…溝部、１１…断部、１２…段差。
DESCRIPTION OF
Claims (4)
前記鍔部と前記肉厚部で前記封口板を挟み込むことと、
前記閉口端部の端面には薄肉部を設けることと、
前記肉厚部または前記肉厚部側の前記弁胴部から始まって、前記弁胴部の外表面の、前記圧力弁用貫通穴軸方向の途中まで伸びる一つまたは複数の溝部を設けるコンデンサ用圧力弁。 In the pressure valve for a capacitor, which is provided on a sealing plate of the capacitor and includes a pressure valve through hole and a pressure valve support inserted into the through hole, the pressure valve support opens to the inside of the capacitor. It is an elastomer of a cylindrical body, has a central valve body, a flange on the outer periphery of the closed end, and a continuous or intermittent thick part on the outer periphery of the open end,
Sandwiching the sealing plate between the collar and the thick part;
Providing a thin-walled portion on the end face of the closed end;
For a capacitor provided with one or a plurality of grooves starting from the valve body on the thick part or the thick part side and extending to the middle of the pressure valve through hole axial direction on the outer surface of the valve body Pressure valve.
前記鍔部と前記肉厚部で前記封口板を挟み込むことと、
前記閉口端部の端面には薄肉部を設けることと、
前記弁胴部は段差構造であって、その肉厚部側は圧力弁用貫通穴径より小径でかつ、前記圧力弁用貫通穴には、前記圧力弁用貫通穴軸方向の、前記鍔部と前記弁胴部の境界から始まって前記弁胴部の段差手前途中まで伸びる一つまたは複数の溝部を設けることと、を特徴とするコンデンサ用圧力弁。 In the pressure valve for a capacitor, which is provided on a sealing plate of the capacitor and includes a pressure valve through hole and a pressure valve support inserted into the through hole, the pressure valve support opens to the inside of the capacitor. It is an elastomer of a cylindrical body, has a central valve body, a flange on the outer periphery of the closed end, and a continuous or intermittent thick part on the outer periphery of the open end,
Sandwiching the sealing plate between the collar and the thick part;
Providing a thin-walled portion on the end face of the closed end;
The valve body portion has a step structure, and the thick portion side is smaller in diameter than the pressure valve through hole diameter, and the pressure valve through hole has the flange portion in the axial direction of the pressure valve through hole. And one or a plurality of grooves extending from the boundary of the valve body part to the middle of the step part of the valve body part.
4. The capacitor pressure valve according to claim 1, wherein the pressure valve through hole is provided with a gap portion having a different cross-sectional diameter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103515105A (en) * | 2012-06-28 | 2014-01-15 | 尼吉康株式会社 | Pressure valve for electrolytic capacitor, and electrolytic capacitor using same |
| JP2019053934A (en) * | 2017-09-18 | 2019-04-04 | タイガースポリマー株式会社 | Explosion-proof valve body for sealed electrochemical device |
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| JPS6258035A (en) * | 1985-09-06 | 1987-03-13 | Mazda Motor Corp | Air-fuel ratio controller for engine |
| JP2004190802A (en) * | 2002-12-12 | 2004-07-08 | Kokoku Intech Co Ltd | Pressure regulating valve and capacitor provided therewith |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6258035A (en) * | 1985-09-06 | 1987-03-13 | Mazda Motor Corp | Air-fuel ratio controller for engine |
| JP2004190802A (en) * | 2002-12-12 | 2004-07-08 | Kokoku Intech Co Ltd | Pressure regulating valve and capacitor provided therewith |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515105A (en) * | 2012-06-28 | 2014-01-15 | 尼吉康株式会社 | Pressure valve for electrolytic capacitor, and electrolytic capacitor using same |
| US20140233156A1 (en) * | 2012-06-28 | 2014-08-21 | Nichicon Corporation | Pressure valve for electrolytic capacitor, and electrolytic capacitor using same |
| US9299502B2 (en) * | 2012-06-28 | 2016-03-29 | Nichicon Corporation | Pressure valve for electrolytic capacitor, and electrolytic capacitor using same |
| TWI557762B (en) * | 2012-06-28 | 2016-11-11 | Nichicon Corp | A pressure valve for an electrolytic capacitor, and an electrolytic capacitor using the pressure valve |
| EP2869322A4 (en) * | 2012-06-28 | 2016-11-16 | Nichicon Corp | Pressure valve for electrolytic capacitor, and electrolytic capacitor using same |
| CN103515105B (en) * | 2012-06-28 | 2017-04-26 | 尼吉康株式会社 | Pressure valve for electrolytic capacitor, and electrolytic capacitor using same |
| JP2019053934A (en) * | 2017-09-18 | 2019-04-04 | タイガースポリマー株式会社 | Explosion-proof valve body for sealed electrochemical device |
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