JPH07133972A - Expansion valve - Google Patents
Expansion valveInfo
- Publication number
- JPH07133972A JPH07133972A JP5302220A JP30222093A JPH07133972A JP H07133972 A JPH07133972 A JP H07133972A JP 5302220 A JP5302220 A JP 5302220A JP 30222093 A JP30222093 A JP 30222093A JP H07133972 A JPH07133972 A JP H07133972A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- reinforcing ring
- expansion valve
- peripheral edge
- valve
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、冷凍機の冷凍サイクル
に用いる膨張弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion valve used in a refrigeration cycle of a refrigerator.
【０００２】[0002]
【従来の技術】冷凍機の冷凍サイクルは、冷媒を圧縮機
により圧縮し、高温高圧になった冷媒を凝縮器で凝縮
し、液化した冷媒を膨張弁で制御しつつ膨張気化させ、
この低温冷媒を蒸発器で空気等と熱交換して冷凍作用を
行い、その冷媒を再び圧縮機で圧縮するサイクルを繰り
返している。2. Description of the Related Art In the refrigeration cycle of a refrigerator, a refrigerant is compressed by a compressor, a high-temperature and high-pressure refrigerant is condensed by a condenser, and a liquefied refrigerant is expanded and vaporized while being controlled by an expansion valve.
This low temperature refrigerant exchanges heat with air or the like in the evaporator to perform a refrigerating action, and the refrigerant is compressed again in the compressor.
【０００３】このような冷凍サイクルに用いる膨張弁
は、弁の開口面積を調節するための弁体をダイヤフラム
により上下動させるようにし、そのダイヤフラムの上側
室と、蒸発器の出口管の管壁に密着させ、その内部にガ
スを封入した感温筒とをキャピラリチューブにより連結
し、ダイヤフラムの下側室には蒸発器の出口管の冷媒ガ
ス圧を均圧管により導き、上側室と下側室の圧力に応じ
て膨張弁の開度調整を行っている。In an expansion valve used in such a refrigeration cycle, a valve body for adjusting the opening area of the valve is moved up and down by a diaphragm, and the upper chamber of the diaphragm and the pipe wall of the outlet pipe of the evaporator are provided. The temperature-sensing cylinder filled with gas is connected to the temperature-sensing cylinder by a capillary tube, and the refrigerant gas pressure in the outlet tube of the evaporator is guided to the lower chamber of the diaphragm by a pressure equalizing pipe, and the pressure in the upper chamber and the lower chamber is adjusted. Accordingly, the opening degree of the expansion valve is adjusted.
【０００４】膨張弁はこのような構成により、冷凍サイ
クルにおいて蒸発器での熱交換量が増大し、冷媒の過熱
度が大きくなると、感温筒の温度上昇により内部のガス
圧が増大し、ダイヤフラム上側室の圧力が高まる結果、
ダイヤフラムは弁体を下方に押下して開弁作動をし、冷
媒量を増加させる。また、蒸発器での熱交換量が減少
し、冷媒の過熱度が減少すると、感温筒の温度低下によ
り内部のガス圧が低下し、ダイヤフラム上側室の圧力が
減少する結果、ダイヤフラムを下方に押下する力が減少
し、閉弁方向の作動をし、冷媒量を減少させる。この作
動に際し、ダイヤフラムの下側室には蒸発器出口の冷媒
圧が作用し、この冷媒圧に応じた補正作用をなしてい
る。With such a structure, the expansion valve increases the amount of heat exchange in the evaporator in the refrigeration cycle and increases the degree of superheat of the refrigerant, which increases the temperature of the temperature sensing cylinder and increases the gas pressure inside the diaphragm. As a result of the increased pressure in the upper chamber,
The diaphragm pushes the valve element downward to open the valve, increasing the amount of refrigerant. When the amount of heat exchange in the evaporator decreases and the degree of superheat of the refrigerant decreases, the internal gas pressure decreases due to the temperature drop in the temperature sensing cylinder, and the pressure in the upper chamber of the diaphragm decreases, causing the diaphragm to move downward. The pressing force is reduced, the valve is closed, and the amount of refrigerant is reduced. At the time of this operation, the refrigerant pressure at the outlet of the evaporator acts on the lower chamber of the diaphragm, and corrects the refrigerant pressure.
【０００５】[0005]
【発明が解決しようとする課題】上記膨張弁において、
内部のダイヤフラムの上側室及び下側室には各々ガス圧
が作用し、その圧力に応じて弁体を上下に作動している
ため、ダイヤフラムは常に上下動を繰り返している。し
たがって、ダイヤフラムの周縁の支持部に集中的に繰り
返し曲げ応力が作用し、この部分に亀裂を生じてガス漏
れを生じることがある。特に、ダイヤフラムの周縁は、
ダイヤフラム下方の下蓋とその上方の上蓋で挾み込み、
その後、上蓋と下蓋の周縁をダイヤフラムと共に溶接す
ることにより一体化しており、ダイヤフラムは、その際
の溶接熱で特に周縁部がもろくなっている。したがっ
て、ダイヤフラムの作動時に、このもろくなった部分に
繰り返し曲げ応力が作用する結果、特に亀裂を生じ易く
ガス漏れを生じ易い。In the expansion valve described above,
Gas pressure acts on each of the upper chamber and the lower chamber of the internal diaphragm, and the valve element is operated up and down according to the pressure, so that the diaphragm constantly repeats vertical movement. Therefore, bending stress may be repeatedly and intensively applied to the supporting portion at the peripheral edge of the diaphragm, and cracks may occur in this portion to cause gas leakage. Especially, the periphery of the diaphragm is
Insert the lower lid below the diaphragm and the upper lid above it,
After that, the peripheral edges of the upper lid and the lower lid are integrated by welding together with the diaphragm, and the peripheral edge portion of the diaphragm is particularly fragile due to the welding heat at that time. Therefore, when the diaphragm is operated, bending stress is repeatedly applied to the brittle portion, and as a result, cracking is particularly likely to occur and gas leakage is likely to occur.
【０００６】ダイヤフラムに亀裂を生じてガス漏れを生
じると、特にダイヤフラムの上側室の感温筒に通じてい
る感温作動ガスが、下側室の蒸発器出口側で圧縮機吸入
側の低圧の冷媒ガス中に吸引され、その結果、感温筒の
作用が全くなくなり、冷凍サイクルは制御不能となり冷
凍機は使用できなくなる。When the diaphragm is cracked and gas leaks, the temperature-sensitive working gas, which is communicated with the temperature-sensitive cylinder in the upper chamber of the diaphragm, is a low-pressure refrigerant on the compressor suction side at the evaporator outlet side of the lower chamber. As a result of being sucked into the gas, the effect of the temperature sensing tube is completely lost, the refrigeration cycle becomes uncontrollable, and the refrigerator cannot be used.
【０００７】したがって、本発明は、ダイヤフラムの耐
久性を向上し、ダイヤフラムに移動が大きく規制される
ことがなく、膨張弁の感温特性を低下させることがない
膨張弁を提供することを目的とするものである。Therefore, it is an object of the present invention to provide an expansion valve which improves the durability of the diaphragm, does not greatly restrict the movement of the diaphragm, and does not deteriorate the temperature-sensitive characteristics of the expansion valve. To do.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記課題を解
決するために、弁体ｉ当接したダイヤフラムの周縁を上
蓋と下蓋間に挾持して固定してなる膨張弁において、ダ
イヤフラムの周縁と下蓋間に補強リングを挾持して固定
し、該補強リングの内周端を下蓋のダイヤフラム挾持部
から内方に突出させ、かつダイヤフラムの外側波部より
外方に位置させるようにしたものである。In order to solve the above-mentioned problems, the present invention provides an expansion valve in which a peripheral edge of a diaphragm, which abuts on a valve element i, is clamped and fixed between an upper lid and a lower lid. The reinforcement ring is clamped and fixed between the peripheral edge and the lower lid, and the inner peripheral end of the reinforcement ring is projected inward from the diaphragm holding portion of the lower lid, and is positioned outside the outer corrugated portion of the diaphragm. It was done.
【０００９】[0009]
【作用】本発明は、上記のように構成したので、膨張弁
の弁体は、ダイヤフラムと上蓋間に形成される上部室
と、ダイヤフラムと下蓋間に形成される下部室とに導入
されるガス圧に応じて、ダイヤフラムの中心部が上下動
することにより上下動し、弁の開閉作動を行う。その
際、ダイヤフラム周縁の下方は補強リングにより支持さ
れているので、ダイヤフラムにおいて最も集中的に交番
曲げ応力が作用する周縁部において、ダイヤフラムの下
方への過大な移動が規制され、かつ上方への撓み時の曲
げ部を補強リングの突出部全体及びその内周縁とするこ
とにより曲げ応力の作用点を分散させ、かつ補強リング
によりダイヤフラムの下方に当接された弁体の重量を受
ける作用をなす。Since the present invention is configured as described above, the valve body of the expansion valve is introduced into the upper chamber formed between the diaphragm and the upper lid and the lower chamber formed between the diaphragm and the lower lid. Depending on the gas pressure, the central part of the diaphragm moves up and down to move up and down, opening and closing the valve. At this time, since the lower part of the diaphragm peripheral edge is supported by the reinforcing ring, excessive downward movement of the diaphragm is restricted and the upward bending of the diaphragm is restricted at the peripheral edge portion where the alternating bending stress acts most intensively in the diaphragm. By making the bent portion at this time the entire projecting portion of the reinforcing ring and the inner peripheral edge thereof, the point of action of bending stress is dispersed, and the reinforcing ring acts to receive the weight of the valve element abutting below the diaphragm.
【００１０】[0010]
【実施例】本発明の実施例を図面に沿って説明する。図
２は、本発明の膨張弁１の全体構成を示し、図３は、こ
の膨張弁１を適用する冷凍機の冷凍サイクルを示す。膨
張弁１の弁本体２の下方には、切換弁３が図示実線に示
す方向に切り換えている状態において、圧縮機４で圧縮
された高温高圧冷媒を凝縮する凝縮器５から液化冷媒を
導入する導入管６を接続しており、弁本体２の側方に
は、蒸発器７に接続する排出管８を接続している。Embodiments of the present invention will be described with reference to the drawings. 2 shows the overall configuration of the expansion valve 1 of the present invention, and FIG. 3 shows a refrigeration cycle of a refrigerator to which the expansion valve 1 is applied. The liquefied refrigerant is introduced below the valve body 2 of the expansion valve 1 from the condenser 5 that condenses the high-temperature high-pressure refrigerant compressed by the compressor 4 while the switching valve 3 is switched in the direction shown by the solid line in the figure. An inlet pipe 6 is connected, and a discharge pipe 8 connected to an evaporator 7 is connected to the side of the valve body 2.
【００１１】弁本体２の内部には、導入管６と排出管８
を連通する連通路１０を設け、連通路１０には通孔１１
を有する弁座１２を備えている。この弁座１２には常時
スプリング１３により閉弁方向に付勢されている弁体１
５を有し、弁体１５を作動するため弁本体２の上部に配
置したダイヤフラム１６に対し、ロッド１７及び受け板
１８を介して連結している。Inside the valve body 2, an introduction pipe 6 and a discharge pipe 8 are provided.
Is provided with a communication passage 10, and the communication passage 10 has a through hole 11
Is provided with a valve seat 12. The valve seat 1 is constantly urged in the valve closing direction by a spring 13 toward the valve seat 12.
5, which is connected to a diaphragm 16 arranged above the valve body 2 for operating the valve body 15 via a rod 17 and a receiving plate 18.
【００１２】ダイヤフラム１６は、弁本体２の上部に固
定した下蓋２０とその上部に配置した上蓋２１間で、そ
の周縁部において挾持されて密封状態に固定されてい
る。上蓋２１にはキャピラリチューブ２３の一端が固定
され、その他端は内部に感熱膨張材を封入した感温筒２
４に固定し、感温筒２４は、蒸発器７と圧縮機４の吸込
口を連結する蒸発器出口管２５の外壁に密着固定され、
蒸発器出口管２５の温度に応じて膨張する感温筒２４内
の感熱膨張材の変位を、キャピラリチューブ２３内の作
動ガス圧変化に変換し、その圧力を上側室２２に導き、
弁体１５の作動圧力とする。The diaphragm 16 is sandwiched between the lower lid 20 fixed to the upper portion of the valve main body 2 and the upper lid 21 arranged on the upper portion thereof and fixed in a hermetically sealed state. One end of a capillary tube 23 is fixed to the upper lid 21, and the other end has a thermosensitive tube 2 in which a thermosensitive expansion material is enclosed.
4, the temperature sensitive tube 24 is closely fixed to the outer wall of the evaporator outlet pipe 25 that connects the evaporator 7 and the suction port of the compressor 4,
The displacement of the heat-sensitive expansion material in the temperature-sensitive cylinder 24, which expands according to the temperature of the evaporator outlet pipe 25, is converted into a change in the working gas pressure in the capillary tube 23, and the pressure is guided to the upper chamber 22,
The operating pressure of the valve body 15 is used.
【００１３】一方、感温筒２４を固定した蒸発器出口管
２５の冷媒ガスを導く均圧管２６を弁本体２に連結し、
その出口２７をスプリング室２８を介してダイヤフラム
の下側室３０と連通させ、下側室３０には、蒸発器出口
管２５の冷媒ガス圧力を導入している。On the other hand, a pressure equalizing pipe 26 for guiding the refrigerant gas of the evaporator outlet pipe 25 to which the temperature sensitive cylinder 24 is fixed is connected to the valve body 2.
The outlet 27 is communicated with the lower chamber 30 of the diaphragm via the spring chamber 28, and the refrigerant gas pressure of the evaporator outlet pipe 25 is introduced into the lower chamber 30.
【００１４】ダイヤフラム１６は、図１に示すように、
その周縁部３１においてその上側は上蓋縁部３２に接
し、下側は補強リング３３に接し、補強リング３３の下
面は下蓋縁部３４に接している。その製造に際しては、
下蓋２０の下蓋縁部３４に補強リング３３を載置し、そ
の上部にダイヤフラム１６を載置し、更にその上に上蓋
２１を載置し、ダイヤフラム１６と補強リング３３とを
下蓋縁部３４と上蓋縁部３２間で挾持し、全体の接合外
周部を溶接することにより一体的に固定する。The diaphragm 16 is, as shown in FIG.
The upper side of the peripheral edge portion 31 is in contact with the upper lid edge portion 32, the lower side thereof is in contact with the reinforcing ring 33, and the lower surface of the reinforcing ring 33 is in contact with the lower lid edge portion 34. In its manufacture,
The reinforcing ring 33 is placed on the lower lid edge portion 34 of the lower lid 20, the diaphragm 16 is placed on the upper portion thereof, and the upper lid 21 is further placed on the diaphragm 16, and the diaphragm 16 and the reinforcing ring 33 are placed on the lower lid edge. It is sandwiched between the portion 34 and the upper lid edge portion 32, and the entire joint outer peripheral portion is welded to be integrally fixed.
【００１５】補強リング３３は、ステンレス等のダイヤ
フラムと同様の材質でリング状に成形し、必要に応じて
その硬度及び厚さを任意に選定する。その外径は、ダイ
ヤフラム１６及び上蓋２１及び下蓋２０と同一外径と
し、その内径は、下蓋縁部３４上面３５の内周端３６よ
り内方に突出し、ダイヤフラム１６の上下への移動吸収
用波部３７，３８のうち、最も外側の波部３８より外側
に位置するように設定される。その結果、ダイヤフラム
１６が下方へ移動する際、ダイヤフラムの周縁部３１
は、補強リング３３の下蓋縁部３４から内方に突出した
支持部４０を下方に曲げつつ、補強リング３３の内周端
４１で支持されることなく下方に曲がる。その際、内周
端４１は、ダイヤフラム１６の下方への移動を一部吸収
する波部３７，３８の作用を阻害することがない。The reinforcing ring 33 is formed into a ring shape with the same material as the diaphragm such as stainless steel, and its hardness and thickness are arbitrarily selected as required. The outer diameter thereof is the same as the outer diameter of the diaphragm 16, the upper lid 21 and the lower lid 20, and the inner diameter thereof projects inward from the inner peripheral end 36 of the upper surface 35 of the lower lid edge portion 34 to absorb the movement of the diaphragm 16 up and down. It is set so as to be located outside the outermost wave portion 38 of the wave portions 37 and 38. As a result, when the diaphragm 16 moves downward, the peripheral edge portion 31 of the diaphragm is
Bends downward while the supporting portion 40 protruding inward from the lower lid edge portion 34 of the reinforcing ring 33 is bent downward, without being supported by the inner peripheral end 41 of the reinforcing ring 33. At this time, the inner peripheral edge 41 does not hinder the action of the wave portions 37 and 38 that partially absorb the downward movement of the diaphragm 16.
【００１６】上記膨張弁の作動時において、例えば夏の
高負荷時や停止時等において、ダイヤフラム室内に大き
な圧力が作用し、このような大きな圧力が繰り返し作用
している内に、上蓋と下蓋が次第に脹らむ方向に変形す
ることがある。その時には図４に示すように、上蓋２１
と下蓋２０との内面が、周縁の溶接部４２から内径側に
いく程互いに離れるように変形する。When the expansion valve is operated, for example, when a high load is applied in summer or when it is stopped, a large pressure is applied to the diaphragm chamber, and while such a large pressure is repeatedly applied, the upper lid and the lower lid are operated. May be gradually expanded. At that time, as shown in FIG.
The inner surfaces of the lower lid 20 and the lower lid 20 are deformed so that the inner surfaces of the lower lid 20 and the welded portion 42 at the peripheral edge are separated from each other.
【００１７】しかし、その場合においても、ダイヤフラ
ム１６の周縁部３１の下側には補強リング３３が存在す
るので、ダイヤフラム１６の下方への移動範囲は、下蓋
縁部３４の上面３５の内周端３６より上方でかつ内径側
に存在する補強リング３３の内周端４１となるため、移
動範囲が規制され、ダイヤフラム１６の外周端の溶接部
に大きな交番曲げ応力が作用することがなくなる。ま
た、この際、ダイヤフラム１６の下方への移動は、その
周縁部３１において補強リング３３の上面で均等に接し
つつ移動するため、ダイヤフラム１６の溶接部にかかる
応力は補強リング３３の変形となって吸収され、しかも
応力が大きくなるにつれて補強リングの弾性力に応じて
その内周端４１から外周端の溶接部に向けて受圧点が移
動するため、ダイヤフラム１６の変形点も補強リング３
３の内周端４１から外周端に向けて次第に移動すること
となるため、変形点の移動によりダイヤフラムの特定の
箇所に応力が常時作用することがなくなり、ダイヤフラ
ム１６において最も損傷し易い周縁部の、特に溶接によ
り材質変化を生じている部分の保護をはかることができ
る。その結果、補強リングを付設した場合とそれを付設
しない場合との耐久試験の結果を比較すると、図５に示
すように、補強リングを付設しない場合は、平均６万回
の往復動で使用に耐えない亀裂を生じるのに対し、補強
リングを付設した場合は、平均８万５千回の往復動まで
耐えることができることが判明した。However, even in that case, since the reinforcing ring 33 exists below the peripheral edge portion 31 of the diaphragm 16, the downward movement range of the diaphragm 16 is within the inner periphery of the upper surface 35 of the lower lid edge portion 34. Since it is the inner peripheral end 41 of the reinforcing ring 33 existing above the end 36 and on the inner diameter side, the movement range is restricted, and a large alternating bending stress does not act on the welded portion of the outer peripheral end of the diaphragm 16. Further, at this time, the downward movement of the diaphragm 16 moves evenly in contact with the upper surface of the reinforcing ring 33 at the peripheral edge portion 31, so that the stress applied to the welded portion of the diaphragm 16 becomes the deformation of the reinforcing ring 33. As the stress is absorbed and the stress increases, the pressure receiving point moves from the inner peripheral end 41 toward the welded portion at the outer peripheral end in accordance with the elastic force of the reinforcing ring, so that the deformation point of the diaphragm 16 also increases.
Since it gradually moves from the inner peripheral end 41 to the outer peripheral end of 3, the stress does not always act on a specific portion of the diaphragm due to the movement of the deformation point, and the peripheral edge portion of the diaphragm 16 which is most easily damaged. In particular, it is possible to protect the part where the material is changed by welding. As a result, comparing the results of the durability test with and without the reinforcement ring, as shown in Fig. 5, when the reinforcement ring was not attached, it was used with an average of 60,000 reciprocating motions. It was found that while an unbearable crack is generated, when the reinforcing ring is attached, it can withstand up to 85,000 reciprocating movements on average.
【００１８】また、この補強リング３３の内周端４１の
位置を、ダイヤフラム１６における最も外側の波部３８
より内方まで突出させ、波部３８の底部が補強リング３
３の上面に当接する状態にすると、ダイヤフラム１６の
周縁部３１の下面と補強リング３３の上面とは接触する
ことなく間隙を有することとなる。そのため、ダイヤフ
ラム１６の下方への変形時において、その変形を下方で
支持し補強する補強リングは、常時波部３８の底部でダ
イヤフラム１６に対して作用するので、この波部３８に
集中的に交番応力が作用することとなる。そのためダイ
ヤフラムはこの部分で変形し、破損し易すくなるととも
に、波部３８の底部と補強リング３３との接触点より外
周縁部においては、この接触点を支点としたダイヤフラ
ムの上方への変形を生じ、ダイヤフラム１６の中心部の
上下動とは逆方向の上下動を生じることとなり、ダイヤ
フラム１６の外周縁の溶接部４２には、この交番応力が
作用することとなる。その結果、溶接部には次第に亀裂
を生じることとなり、ダイヤフラム１６の耐久性は必ず
しも向上しない。Further, the position of the inner peripheral end 41 of the reinforcing ring 33 is set to the outermost corrugated portion 38 of the diaphragm 16.
The bottom portion of the corrugated portion 38 protrudes further inward and the reinforcing ring 3
When brought into contact with the upper surface of 3, the lower surface of the peripheral edge portion 31 of the diaphragm 16 and the upper surface of the reinforcing ring 33 have a gap without contacting each other. Therefore, when the diaphragm 16 is deformed downward, the reinforcing ring that supports and reinforces the deformation downward always acts on the diaphragm 16 at the bottom of the corrugated portion 38, so that the corrugated portion 38 is alternately concentrated. Stress will act. Therefore, the diaphragm is easily deformed at this portion, and is easily damaged. At the outer peripheral edge of the contact point between the bottom portion of the wave portion 38 and the reinforcing ring 33, the diaphragm is not deformed upward with this contact point as a fulcrum. This causes vertical movement in the direction opposite to the vertical movement of the central portion of the diaphragm 16, and this alternating stress acts on the welded portion 42 at the outer peripheral edge of the diaphragm 16. As a result, cracks gradually occur in the welded portion, and the durability of the diaphragm 16 does not necessarily improve.
【００１９】また、上記のように補強リングが波部３８
の底部に当接している場合は、感温筒２４の温度変化に
応じてダイヤフラムが上下動し、弁体１５を上下動させ
るリフトは、図６の（ロ）のグラフに示すような性状を
示すのに対し、補強リング３３の内周端４１が波部３８
より外周に存在し、補強リング３３と波部３８が当接し
ない場合は、同図（イ）のグラフに示す性状を示す。こ
のグラフから明らかなように、補強リング３３が波部３
８に当接するとダイヤフラム１６の下方への移動は大き
く規制され、膨張弁の感温特性が低下する。Further, as described above, the reinforcing ring has the corrugated portion 38.
When it is in contact with the bottom of the valve, the diaphragm moves up and down according to the temperature change of the temperature sensing cylinder 24, and the lift that moves the valve body 15 up and down has the property as shown in the graph of (b) of FIG. On the other hand, the inner peripheral end 41 of the reinforcing ring 33 has the corrugated portion 38.
When the reinforcing ring 33 and the corrugated portion 38 are located further on the outer periphery and do not come into contact with each other, the properties shown in the graph of FIG. As is clear from this graph, the reinforcing ring 33 has the corrugated portion 3
When it comes into contact with No. 8, the downward movement of the diaphragm 16 is largely restricted, and the temperature-sensing characteristic of the expansion valve deteriorates.
【００２０】上記のように補強リング３３の内周端４１
の位置は、下蓋のダイヤフラム挾持部から内方に突出さ
せ、かつダイヤフラムの外側波部より外方に位置させる
ことが、ダイヤフラム外周縁部の溶接部分の保護及びダ
イヤフラムの応動特性の観点から重要である。As described above, the inner peripheral end 41 of the reinforcing ring 33 is
It is important from the viewpoint of the protection of the welded part of the outer peripheral edge of the diaphragm and the response characteristics of the diaphragm that the position of is projected inward from the diaphragm holding part of the lower lid and positioned outside the outer corrugated part of the diaphragm. Is.
【００２１】[0021]
【発明の効果】本発明は、上記のように構成し作用する
ので、ダイヤフラムの動作支点の位置を分散し、特に交
番曲げ応力に弱いダイヤフラムの外周縁の固定部から遠
ざけることができ、ダイヤフラムの耐久性を向上するこ
とができる。また補強板により、ダイヤフラムに移動が
大きく規制されることがなく、膨張弁の感温特性を低下
させることもない。Since the present invention is constructed and operates as described above, the positions of the fulcrums of the diaphragm are dispersed, and the diaphragm can be moved away from the fixed portion of the outer peripheral edge of the diaphragm which is particularly vulnerable to alternating bending stress. The durability can be improved. Further, the movement of the diaphragm is not largely restricted by the reinforcing plate, and the temperature-sensitive characteristic of the expansion valve is not deteriorated.
【図１】本発明の実施例の要部断面図である。FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.
【図２】本発明による膨張弁の全体構成を示す断面図で
ある。FIG. 2 is a sectional view showing the overall configuration of an expansion valve according to the present invention.
【図３】本発明の膨張弁を適用する冷凍サイクルのシス
テム図である。FIG. 3 is a system diagram of a refrigeration cycle to which the expansion valve of the present invention is applied.
【図４】本発明の実施例における上蓋と下蓋の変形状態
を示す要部断面図である。FIG. 4 is a cross-sectional view of essential parts showing a deformed state of an upper lid and a lower lid according to an embodiment of the present invention.
【図５】本発明における補強リングを付設した場合とこ
れを付設しない場合の膨張弁の耐久性試験グラフであ
る。FIG. 5 is a durability test graph of an expansion valve with and without a reinforcing ring according to the present invention.
【図６】同補強リングをダイヤフラムの波部に当接した
場合と当接させない本発明との膨張弁のリスト特性比較
グラフである。FIG. 6 is a list characteristic comparison graph of the expansion valve of the present invention in which the reinforcing ring is brought into contact with the corrugated portion of the diaphragm and in the case of not being brought into contact with the same.
１ 膨張弁 ２ 弁本体 ３ 切換弁 ４ 圧縮機 ５ 凝縮機 ７ 蒸発器 １２ 弁座 １３ スプリング １５ 弁体 １６ ダイヤフラム １７ ロッド ２０ 下蓋 ２１ 上蓋 ２２ 上側室 ２３ キャピラリチューブ ２４ 感温筒 ２６ 均圧管 ３０ 下側室 ３１ 周縁部 ３３ 補強リング ３４ 下蓋縁部 ３７ 波部 ３８ 波部 ４０ 支持部 ４１ 内周端 ４２ 溶接部 1 Expansion valve 2 Valve body 3 Switching valve 4 Compressor 5 Condenser 7 Evaporator 12 Valve seat 13 Spring 15 Valve body 16 Diaphragm 17 Rod 20 Lower lid 21 Upper lid 22 Upper chamber 23 Capillary tube 24 Temperature sensing tube 26 Pressure equalizing pipe 30 Lower Side chamber 31 Peripheral portion 33 Reinforcement ring 34 Lower lid edge portion 37 Wave portion 38 Wave portion 40 Support portion 41 Inner peripheral end 42 Weld portion
Claims (1)
蓋と下蓋間に挾持して固定してなる膨張弁において、ダ
イヤフラムの周縁と下蓋間に補強リングを挾持して固定
し、該補強リングの内周端を下蓋のダイヤフラム挾持部
から内方に突出させ、かつダイヤフラムの外側波部より
外方に位置させたことを特徴とする膨張弁。1. An expansion valve in which a peripheral edge of a diaphragm in contact with a valve element is sandwiched and fixed between an upper lid and a lower lid, and a reinforcing ring is sandwiched and fixed between the peripheral edge of the diaphragm and the lower lid. An expansion valve characterized in that an inner peripheral end of a reinforcing ring is protruded inward from a diaphragm holding portion of a lower lid and is positioned outside an outer corrugated portion of the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30222093A JP3388365B2 (en) | 1993-11-09 | 1993-11-09 | Expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30222093A JP3388365B2 (en) | 1993-11-09 | 1993-11-09 | Expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07133972A true JPH07133972A (en) | 1995-05-23 |
| JP3388365B2 JP3388365B2 (en) | 2003-03-17 |
Family
ID=17906402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30222093A Expired - Fee Related JP3388365B2 (en) | 1993-11-09 | 1993-11-09 | Expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3388365B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021085548A (en) * | 2019-11-25 | 2021-06-03 | 株式会社不二工機 | Power element and expansion valve using the same |
| WO2021106932A1 (en) * | 2019-11-25 | 2021-06-03 | 株式会社不二工機 | Power element and expansion valve using same |
-
1993
- 1993-11-09 JP JP30222093A patent/JP3388365B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021085548A (en) * | 2019-11-25 | 2021-06-03 | 株式会社不二工機 | Power element and expansion valve using the same |
| WO2021106932A1 (en) * | 2019-11-25 | 2021-06-03 | 株式会社不二工機 | Power element and expansion valve using same |
| WO2021106934A1 (en) * | 2019-11-25 | 2021-06-03 | 株式会社不二工機 | Power element and expansion valve using same |
| JP2021085546A (en) * | 2019-11-25 | 2021-06-03 | 株式会社不二工機 | Power element and expansion valve using the same |
| CN114667423A (en) * | 2019-11-25 | 2022-06-24 | 株式会社不二工机 | Power element and expansion valve using the same |
| CN114667422A (en) * | 2019-11-25 | 2022-06-24 | 株式会社不二工机 | Power element and expansion valve using the same |
| EP4067714A4 (en) * | 2019-11-25 | 2023-11-22 | Fujikoki Corporation | Power element and expansion valve using same |
| EP4067713A4 (en) * | 2019-11-25 | 2023-11-22 | Fujikoki Corporation | Power element and expansion valve using same |
| CN114667422B (en) * | 2019-11-25 | 2024-04-12 | 株式会社不二工机 | Power element and expansion valve using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3388365B2 (en) | 2003-03-17 |
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