JPH0926233A - Expansion valve - Google Patents

Expansion valve

Info

Publication number
JPH0926233A
JPH0926233A JP7175215A JP17521595A JPH0926233A JP H0926233 A JPH0926233 A JP H0926233A JP 7175215 A JP7175215 A JP 7175215A JP 17521595 A JP17521595 A JP 17521595A JP H0926233 A JPH0926233 A JP H0926233A
Authority
JP
Japan
Prior art keywords
valve
diaphragm
stopper member
power element
expansion 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.)
Pending
Application number
JP7175215A
Other languages
Japanese (ja)
Inventor
Kazuhiko Watanabe
和彦 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujikoki Corp
Original Assignee
Fujikoki Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujikoki Corp filed Critical Fujikoki Corp
Priority to JP7175215A priority Critical patent/JPH0926233A/en
Publication of JPH0926233A publication Critical patent/JPH0926233A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To make a light weight stopper member and improve productivity by a method wherein the stopper member is provided with a disc-like main body of which upper surface is contacted with a lower surface of a diaphragm, a shaft part formed at a central part of a lower surface of the main body and a thin-walled part formed radially at a lower surface of the shaft. SOLUTION: An expansion valve 102 is made of brass and a thermo-sensitive cylinder 152 for converting a temperature into a pressure by a conduit 150 is connected to a power element 120 composed of austenite copper. Then, a valve main body space and a power element pressure space are divided by a diaphragm 126 composed of a thin stainless steel plate. A stopper member 230 for the diaphragm is arranged for limiting a displacement amount of the diaphragm to an value smaller than a specified value while being contacted with it. There are provided an operating rod 110 for transmitting displacement, a valve member 106 to be contacted with or moved away from a valve seat and a spring 104 for biasing the valve member toward a valve closing direction. In this case, there are provided more than one bridges at one surface of the plane of the stopper member 230 extending from the central shaft to an external line and then the remaining part is made thin.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は膨張弁、特に車両用
空調装置に用いられる冷凍システムにおいて、蒸発器に
必要な冷媒量を供給するための膨張弁に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion valve, and more particularly to an expansion valve for supplying a necessary amount of refrigerant to an evaporator in a refrigeration system used for a vehicle air conditioner.

【0002】[0002]

【従来の技術】車両用空調装置に用いられる冷凍システ
ムにおいて、外界と熱交換を行ない、熱を外界から奪う
ための熱交換機(蒸発器)の能力を充分に発揮させるた
め膨張弁が広く用いられている。従来の膨張弁として代
表的なものの一つは、図7に示す構造をとり、高圧の液
冷媒を減圧するための弁部100と、この弁部の弁開度
を制御するためのパワーエレメント120からなる。
2. Description of the Related Art In a refrigeration system used for a vehicle air conditioner, an expansion valve is widely used in order to perform heat exchange with the outside world and to fully exert the capacity of a heat exchanger (evaporator) to remove heat from the outside world. ing. One of the typical conventional expansion valves has a structure shown in FIG. 7, and has a valve portion 100 for reducing the pressure of a high-pressure liquid refrigerant and a power element 120 for controlling the valve opening of this valve portion. Consists of.

【0003】パワーエレメント120は、上蓋部122
と下支持部124の外周縁に挾持して溶接したダイアフ
ラム126を包含し、前記上蓋部122とダイアフラム
126でダイアフラムの上部の第1の圧力空間が形成さ
れる。この第1の圧力空間は導管150を介して感温筒
152の内部と連通している。この感温筒152は蒸発
器の出口部分に取付けられ、蒸発器出口近傍の冷媒温度
を感知し、この温度を圧力P1に変換して、パワーエレ
メントの第1の圧力空間に加える。前記圧力P1は、そ
れが増加するときダイアフラム126を下方に押して、
弁体106の開弁方向の力となる。
The power element 120 has an upper lid 122.
And a diaphragm 126 held and welded to the outer peripheral edge of the lower support portion 124, and the upper lid portion 122 and the diaphragm 126 form a first pressure space above the diaphragm. The first pressure space communicates with the inside of the temperature sensing cylinder 152 via the conduit 150. The temperature sensing tube 152 is attached to the outlet of the evaporator, senses the temperature of the refrigerant near the outlet of the evaporator, converts this temperature into pressure P1, and applies it to the first pressure space of the power element. The pressure P1 pushes the diaphragm 126 downwards as it increases,
The force acts in the valve opening direction of the valve body 106.

【0004】一方、ダイアフラム126の下部の第2の
圧力空間には、導管160を介して蒸発器出口の冷媒圧
力P2が配管取付部162から直接導かれる。この圧力
P2はダイアフラム126の下部に形成される第2の圧
力室140に供給され、バイアスばね104の力と共に
弁体106の閉弁方向に働く。すなわち過熱度(冷媒の
蒸発器出口温度と蒸発温度との差:これは力として取出
すため上記P1−P2となっている)の大きいとき弁を
大きく開き、小さいときは弁を閉まり気味にして、蒸発
器に流れ込む冷媒の量を制御する。
On the other hand, the refrigerant pressure P2 at the evaporator outlet is directly introduced from the pipe mounting portion 162 into the second pressure space below the diaphragm 126 via the conduit 160. The pressure P2 is supplied to the second pressure chamber 140 formed in the lower portion of the diaphragm 126, and works in the valve closing direction of the valve body 106 together with the force of the bias spring 104. That is, when the degree of superheat (the difference between the outlet temperature of the evaporator of the refrigerant and the evaporation temperature: this is P1-P2 because it is taken out as force) is large, the valve is opened greatly, and when it is small, the valve is closed, Controls the amount of refrigerant flowing into the evaporator.

【0005】弁の基本構造部(弁部100)は、高圧冷
媒の入口107と低圧冷媒の出口109及び均圧導管1
32を接続するための均圧口103を有する弁本体10
2を外郭とする。この外郭としての弁本体102には、
ダイアフラム126の下方への変位を規制するストッパ
部材(変位規制部材)130と、ダイアフラム126の
変位を下方に伝達する作動棒110(この作動棒110
には、その動きに一定の拘束を与えるための拘束部材1
16,118を配置することが多い)と、弁座(符号省
略)に接離する弁体106(図ではボール弁を示してい
る)と、上述したバイアスばね104とが、このばねの
バイアス力を調整するための調節部材108と共に組込
まれている。
The basic structural portion of the valve (valve portion 100) is composed of a high pressure refrigerant inlet 107, a low pressure refrigerant outlet 109, and a pressure equalizing conduit 1.
Valve body 10 having pressure equalizing port 103 for connecting 32
2 is the outer shell. In the valve body 102 as the outer shell,
A stopper member (displacement restricting member) 130 that restricts the downward displacement of the diaphragm 126, and an actuating rod 110 that transmits the displacement of the diaphragm 126 downward (this actuating rod 110).
Has a restraint member 1 for giving a certain restraint to its movement.
16 and 118 are often arranged), a valve body 106 (a ball valve is shown in the drawing) that comes in contact with and separates from a valve seat (reference numeral is omitted), and the bias spring 104 described above is the bias force of this spring. Is incorporated with an adjusting member 108 for adjusting

【0006】前記弁部100の主構成部材は弁本体10
2、ダイアフラム変位規制部材130、作動棒110、
弁体106、バイアスばね104である。望ましい構成
として更に調節部材108、作動棒110の拘束部材1
16,118が追加される。かかる膨張弁を構成する主
要部材のうち、パワーエレメント120の上蓋部122
及び下支持部124の材質を例えばオーステナイト系ス
テンレス鋼を用い、ダイアフラム126を析出硬化型ス
テンレス鋼またはオーステナイト系ステンレス鋼とし、
この三者を溶接によって結合することによって、パワー
エレメント120には洩れがなく信頼性の高い構成にで
き、さらに弁の基本構造部である弁本体102は内部を
精度よく切削加工することができる黄銅材の鍛造品と
し、作動棒110や弁体106のような部材を単純形状
のオーステナイト鋼とすることにより、信頼性の高いも
のにしている。
The main constituent member of the valve section 100 is the valve body 10.
2, diaphragm displacement regulating member 130, actuating rod 110,
The valve body 106 and the bias spring 104. As a preferable configuration, the restraint member 1 for the adjusting member 108 and the operating rod 110 is further provided.
16,118 are added. Among the main members constituting the expansion valve, the upper lid portion 122 of the power element 120
And the material of the lower support portion 124 is, for example, austenitic stainless steel, and the diaphragm 126 is precipitation hardening stainless steel or austenitic stainless steel,
By joining these three members by welding, the power element 120 can be configured to have no leakage and high reliability, and further, the valve main body 102, which is the basic structural part of the valve, can be accurately machined inside brass. The forged product is made highly reliable by making the members such as the actuating rod 110 and the valve body 106 simple austenitic steel.

【0007】[0007]

【発明が解決しようとする課題】しかし上記のような信
頼性の高い膨張弁でも、車両用空調用システム(冷凍シ
ステム)に採用すると、次のような不具合点が生じた。
実際に空調システムが作動しているときは、何等の不具
合を生じない場合であっても、あるシステムには次のよ
うな現象が生じる。
However, even if the expansion valve having high reliability as described above is used in a vehicle air conditioning system (refrigeration system), the following problems occur.
When the air conditioning system is actually operating, the following phenomenon occurs in a certain system even if no trouble occurs.

【0008】すなわち、冷凍システムの作動を停止した
後、ある条件で膨張弁に起因する、人に不安感をもたら
す不快な振動音が発生することである。これは空調シス
テムの故障とかシステムの不具合に起因するものではな
い。
That is, after the operation of the refrigeration system is stopped, an unpleasant vibration sound that causes anxiety to a person is generated under a certain condition due to the expansion valve. This is not due to an air conditioning system failure or system malfunction.

【0009】このような振動音が発生するのは、前述し
た図7に示す膨張弁の構成において、空調システムが停
止したとき、ダイアフラム126を下方に押しつける圧
力P1に対して、これに対向する圧力P2が相対的に大
きい(このようなことは冷凍システムの作動中には生じ
ないように設計されている)とき、ストッパー部材13
0とダイアフラム126との間に隙間が発生する。
Such a vibrating sound is generated because, in the configuration of the expansion valve shown in FIG. 7 described above, when the air conditioning system is stopped, the pressure P1 that presses the diaphragm 126 downwardly is opposed to the pressure P1. When P2 is relatively large (this is designed not to occur during operation of the refrigeration system), the stopper member 13
A gap is generated between 0 and the diaphragm 126.

【0010】このような時には、外部の振動源によって
部品間に微少な振動を拾う。この振動がダイアフラム1
26のような弾性膜に伝播すると、接続的な振動の原因
となり、可聴の音源となる。この音は不安感をもたらす
不快音と判断されることがしばしばあり、基本的には、
このような音を発生させないようにすることが要求され
る。
In such a case, a slight vibration is picked up between the parts by an external vibration source. This vibration is diaphragm 1
When it propagates to an elastic film such as 26, it causes a connecting vibration and becomes an audible sound source. This sound is often judged to be an uncomfortable sound that causes anxiety, and basically,
It is required not to generate such a sound.

【0011】図8は従来の膨張弁の振動数を横軸に、振
動ピックアップによる振動レベル測定値を縦軸にとった
ときの測定結果を示す。本発明の第1の目的は、ダイア
フラムと弁の作動棒との間に配設するストッパ部材の改
良に係り、ストッパ部材の軽量化と生産性の向上を図る
ものである。
FIG. 8 shows the measurement results when the horizontal axis represents the frequency of the conventional expansion valve and the vertical axis represents the vibration level measurement value by the vibration pickup. A first object of the present invention relates to an improvement of a stopper member arranged between a diaphragm and an actuating rod of a valve, and is intended to reduce the weight of the stopper member and improve productivity.

【0012】[0012]

【課題を解決するための手段】前記の目的を達成するた
め、次のような手段をとる。すなわち、本発明は黄銅で
構成した弁本体102、オーステナイト銅からなるパワ
ーエレメント120、温度を圧力に変換する感温筒15
2、この感温筒と前記パワーエレメント120を連結す
る導管150、弁本体内部空間とパワーエレメント圧力
空間を区割するステンレス鋼の薄板からなるダイアフラ
ム126、該ダイアフラムに隣接してその変位を一定量
以下に制限するためのダイアフラムのストッパ部材23
0、変位伝達のための作動棒110、弁座と接離する弁
体106、該弁体を閉弁方向にバイアスするためのばね
104を主構成部品とする膨張弁であって、ストッパ部
材230にいわゆる肉抜き部を設けた構成とする。
In order to achieve the above-mentioned object, the following means are taken. That is, the present invention is a valve body 102 made of brass, a power element 120 made of austenite copper, and a temperature sensing tube 15 for converting temperature into pressure.
2. A conduit 150 connecting the temperature sensing cylinder and the power element 120, a diaphragm 126 made of a stainless steel thin plate that divides the valve body internal space and the power element pressure space, and a certain amount of displacement adjacent to the diaphragm 126. Diaphragm stopper member 23 for limiting to:
0, an actuating rod 110 for transmitting displacement, a valve body 106 that comes in contact with and separates from a valve seat, and an expansion valve whose main components are a spring 104 for biasing the valve body in the valve closing direction. A so-called lightening portion is provided in the structure.

【0013】上記ダイアフラムのストッパ部材230を
黄銅あるいはアルミニウムを主成分とする合金によって
作成することを特徴とする。さらに、本発明は、このス
トッパ部材230の平面である面の一方に中心軸部23
4から外縁に通じる一以上のブリッジ部238を設け、
残りの部分をいわゆる肉抜きして軽量化を図る。
It is characterized in that the diaphragm stopper member 230 is made of brass or an alloy containing aluminum as a main component. Further, according to the present invention, the central shaft portion 23 is provided on one of the plane surfaces of the stopper member 230.
4 to provide one or more bridge portions 238 leading to the outer edge,
The remaining part is so-called meat-reduced to reduce weight.

【0014】[0014]

【発明の実施の形態】以下、本発明の実施例を図1乃至
図6に従い説明する。なお、構成の説明を簡素化するた
め、図7と同一の構成部分については、同一の符号を付
し、図7に示す従来例の説明で述べた部分については説
明を省略する。
DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. In order to simplify the description of the configuration, the same components as those in FIG. 7 are denoted by the same reference numerals, and the description of the portions described in the description of the conventional example shown in FIG. 7 is omitted.

【0015】図1において円板状のストッパ部材230
は、図2に示す断面図、図3に示す底面図のような形状
に構成した。すなわち、本実施例のダイアフラムのスト
ッパ部材230は、上面232がダイアフラム126の
下面に接し、ストッパ部材230の下面の中心部に作動
棒110との組合わせを可能とする円柱状または中空状
(図2では円柱状を示している)の作動棒110が当接
する中心軸部234を設け、この中心軸部234から外
周に延びるブリッジ部238を設ける。そしてブリッジ
部238以外を肉抜きして薄肉部236を形成し、スト
ッパ部材230全体の軽量化を図る。
In FIG. 1, a disk-shaped stopper member 230 is provided.
Was formed into a shape as shown in the sectional view of FIG. 2 and the bottom view of FIG. That is, the diaphragm stopper member 230 of this embodiment has a cylindrical or hollow shape in which the upper surface 232 is in contact with the lower surface of the diaphragm 126 and the central portion of the lower surface of the stopper member 230 can be combined with the operating rod 110 (see FIG. 2 has a cylindrical shape), a central shaft portion 234 with which the actuation rod 110 abuts is provided, and a bridge portion 238 extending from the central shaft portion 234 to the outer periphery is provided. Then, parts other than the bridge part 238 are thinned to form a thin part 236 to reduce the weight of the entire stopper member 230.

【0016】ストッパ部材230は、例えば黄銅のよう
な、耐蝕性の高い材料でつくられる。黄銅の比重は比較
的大きいので、肉抜き部を形成することによって軽量化
を図ることができる。ストッパ部材230の下縁部は、
ダイアフラム126をとりつけた下支持部124に当接
する。この際に、ストッパ部材230の下縁部が下支持
部124の上面に対して環状の線接触部を形成すると、
両者はシールを形成する場合がある。
The stopper member 230 is made of a material having high corrosion resistance such as brass. Since the specific gravity of brass is relatively large, it is possible to reduce the weight by forming the lightening portion. The lower edge of the stopper member 230 is
It abuts on the lower support portion 124 to which the diaphragm 126 is attached. At this time, if the lower edge portion of the stopper member 230 forms an annular line contact portion with the upper surface of the lower support portion 124,
Both may form a seal.

【0017】而して、膨張弁のダイアフラムの洩れを検
査するためにダイアフラムの上部室にガスを封入した状
態でダイアフラム下部へガスが流出しないことを確認す
ることが行なわれる。したがって、ストッパ部材と下支
持部との間にシールが存在すると、この流出を検査する
ことができない。
Thus, in order to check the leakage of the diaphragm of the expansion valve, it is confirmed that the gas does not flow out to the lower part of the diaphragm in a state where the upper chamber of the diaphragm is filled with the gas. Therefore, if there is a seal between the stopper member and the lower support, this outflow cannot be inspected.

【0018】本発明のストッパ部材230にあっては、
このブリッジ部238が下支持部124の上面に当接
し、シールを形成することはない。したがって、正確な
検査を達成することができる。
In the stopper member 230 of the present invention,
The bridge portion 238 contacts the upper surface of the lower support portion 124 and does not form a seal. Therefore, an accurate inspection can be achieved.

【0019】図6に本発明の一実施例である膨張弁の上
記に対応する測定結果を示す。本発明の一実施例である
膨張弁の振動レベルは、従来例に比してきわめて低く、
かつ振動数ピークも低振動数側に移行している。このこ
とは本発明により不安感をもたらす不快音の発生が著し
く抑制されたことを示す。
FIG. 6 shows the measurement results corresponding to the above of the expansion valve which is an embodiment of the present invention. The vibration level of the expansion valve according to the embodiment of the present invention is extremely lower than that of the conventional example,
Moreover, the frequency peak has also shifted to the low frequency side. This indicates that the present invention significantly suppressed the generation of uncomfortable sounds that cause anxiety.

【0020】図4,図5は本発明のストッパ部材の他の
実施例を示し、図4はその断面図、図5はその底面図で
ある。円板状のストッパ部材250は、その上面252
がダイアフラムの下面に接し、その下面258の中央部
に軸部254を有する。この下面258に外周縁から延
びる複数の溝256を形成してある。特にこの実施例で
はストッパ部材250を、アルミニウム合金等の軽合金
で製造することによって、更なる軽量化を図ることがで
きる。
4 and 5 show another embodiment of the stopper member of the present invention, FIG. 4 is a sectional view thereof, and FIG. 5 is a bottom view thereof. The disc-shaped stopper member 250 has an upper surface 252.
Is in contact with the lower surface of the diaphragm, and has a shaft portion 254 at the center of the lower surface 258. A plurality of grooves 256 extending from the outer peripheral edge are formed on the lower surface 258. Particularly, in this embodiment, the weight of the stopper member 250 can be further reduced by manufacturing the stopper member 250 with a light alloy such as an aluminum alloy.

【0021】[0021]

【発明の効果】前記のように本発明は膨張弁のダイアフ
ラムに隣接する構成部材(ダイアフラム変位規制部材)
の一つだけの材質と形状の変更改善で膨張弁の本来の機
能や製造方法に何等の不具合を生ずることなく、空調シ
ステム(冷凍システム)の機能停止時に一時的に生じ
る、人に不安感を与える振動音を抑制するという効果が
ある。また一方上記目的のため、選択したアルミニウム
合金が腐食環境にさらされないように上記部材の形状を
改善したので、この部材の信頼性を維持することができ
る。
As described above, according to the present invention, the constituent member adjacent to the diaphragm of the expansion valve (diaphragm displacement restricting member).
Only by changing the material and shape of one of them, without causing any trouble in the original function of the expansion valve or the manufacturing method, the temporary anxiety of people when the air conditioning system (refrigeration system) stops functioning This has the effect of suppressing the vibration noise given. On the other hand, for the above purpose, the shape of the member is improved so that the selected aluminum alloy is not exposed to the corrosive environment, so that the reliability of the member can be maintained.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す膨張弁の中央縦断面
図。
FIG. 1 is a central vertical sectional view of an expansion valve showing an embodiment of the present invention.

【図2】図1の膨張弁に組込まれるダイアフラムのスト
ッパ部材の拡大縦断面図。
FIG. 2 is an enlarged vertical sectional view of a stopper member of a diaphragm incorporated in the expansion valve of FIG.

【図3】図2に示すダイアフラムのストッパ部材を下方
から見た底面図。
FIG. 3 is a bottom view of a stopper member of the diaphragm shown in FIG. 2 viewed from below.

【図4】ダイアフラムのストッパ部材の他の実施例を示
す拡大縦断面図。
FIG. 4 is an enlarged vertical cross-sectional view showing another embodiment of the diaphragm stopper member.

【図5】図4のストッパ部材を下からみた底面図。5 is a bottom view of the stopper member of FIG. 4 seen from below.

【図6】図1に示す本発明の一実施例による膨張弁の部
品拘束力が一時的に失われる条件下での振動測定結果を
示した説明図。
FIG. 6 is an explanatory view showing a vibration measurement result under a condition in which the component restraining force of the expansion valve according to the embodiment of the present invention shown in FIG. 1 is temporarily lost.

【図7】本発明の膨張弁と共通の外形を有する従来の膨
張弁を示した中央縦断面図。
FIG. 7 is a central longitudinal sectional view showing a conventional expansion valve having the same outer shape as the expansion valve of the present invention.

【図8】図7に示す従来の膨張弁の部品拘束力が一時的
に失われる条件下での振動測定結果を示した説明図。
8 is an explanatory diagram showing vibration measurement results under conditions in which the component restraining force of the conventional expansion valve shown in FIG. 7 is temporarily lost.

【符号の説明】[Explanation of symbols]

100 弁部 102 弁本体 104 バイアスばね 106 弁体 107 高圧冷媒の入口 109 低圧冷媒の出口 110 作動棒 120 パワーエレメント 122 上蓋部 124 下支持部 126 ダイアフラム 128 導管、 130 感温筒 230 ストッパ部材 234 中心軸部 236 肉抜き部 238 ブリッジ部 100 Valve Part 102 Valve Body 104 Bias Spring 106 Valve Body 107 High Pressure Refrigerant Inlet 109 Low Pressure Refrigerant Outlet 110 Operating Rod 120 Power Element 122 Upper Lid 124 Lower Support 126 Diaphragm 128 Conduit, 130 Temperature Sensitive Tube 230 Stopper 234 Central Shaft Part 236 lightening part 238 bridge part

Claims (8)

【特許請求の範囲】[Claims] 【請求項1】 弁本体と、パワーエレメントと、温度を
圧力に変換する感温筒と、該感温筒と前記パワーエレメ
ントを連結する導管と、弁本体内部空間とパワーエレメ
ント圧力空間を区割するダイアフラムと、該ダイアフラ
ムに隣接してその変位を一定量以下に制限するためのス
トッパ部材と、変位伝達のための作動棒、弁座と接離す
る弁体、該弁体を閉弁方向にバイアスするためのばねと
からなる温度膨張弁において、 上記ストッパ部材は、上面がダイアフラムの下面に接す
る円板状の本体と、本体の下面中心部に形成される軸部
と、その下面に放射状に形成される肉抜き部とを有する
ことを特徴とする膨張弁。
1. A valve body, a power element, a temperature-sensitive tube for converting temperature into pressure, a conduit connecting the temperature-sensitive tube and the power element, a valve body internal space and a power element pressure space. A diaphragm, a stopper member adjacent to the diaphragm for limiting the displacement thereof to a certain amount or less, an actuation rod for transmitting displacement, a valve element that comes in contact with and separates from a valve seat, and the valve element in a valve closing direction. In a temperature expansion valve including a spring for biasing, the stopper member includes a disk-shaped main body whose upper surface is in contact with the lower surface of the diaphragm, a shaft portion formed at the center of the lower surface of the main body, and a radial shape on the lower surface. An expansion valve having a thinned portion formed.
【請求項2】 上記ストッパ部材は、アルミニウム合金
材料でつくられることを特徴とする請求項1記載の膨張
弁。
2. The expansion valve according to claim 1, wherein the stopper member is made of an aluminum alloy material.
【請求項3】 弁本体と、パワーエレメントと、温度を
圧力に変換する感温筒と、この感温筒と上記パワーエレ
メントを連結する導管と、上記弁本体の内部空間とパワ
ーエレメント圧力空間を区割するダイアフラムと、この
ダイアフラムに隣接してその変位を所定量以下に制御す
るためのストッパ部材と、上記変位を弁体に伝達するた
めの作動棒と、上記弁体が接離する弁座と、上記弁体を
閉弁方向にバイアスするばねとからなる膨張弁におい
て、 上記ストッパ部材は、上記ダイアフラムの非接面に上記
作動棒の当接する当接部分と肉抜き部分とを有すること
を特徴とする膨張弁。
3. A valve body, a power element, a temperature sensing tube for converting temperature into pressure, a conduit connecting the temperature sensing tube and the power element, an internal space of the valve body and a power element pressure space. A diaphragm for partitioning, a stopper member adjacent to the diaphragm for controlling the displacement thereof to a predetermined amount or less, an operating rod for transmitting the displacement to the valve body, and a valve seat for contacting and separating the valve body. And a spring for biasing the valve element in the valve closing direction, the stopper member has a contact portion with which the actuation rod abuts and a thinned portion on a non-contact surface of the diaphragm. A characteristic expansion valve.
【請求項4】 上記ストッパ部材は、黄銅で構成されて
いることを特徴とする請求項3記載の膨張弁。
4. The expansion valve according to claim 3, wherein the stopper member is made of brass.
【請求項5】 上記ストッパ部材は、アルミニウム合金
で構成されていることを特徴とする請求項3記載の膨張
弁。
5. The expansion valve according to claim 3, wherein the stopper member is made of an aluminum alloy.
【請求項6】 上記ストッパ部材は、アルミニウム合金
であると共に、上記当接部分は中心部に形成され、上記
肉抜き部分は外縁部に形成されることを特徴とする請求
項3記載の膨張弁。
6. The expansion valve according to claim 3, wherein the stopper member is made of an aluminum alloy, the abutting portion is formed in a central portion, and the lightening portion is formed in an outer edge portion. .
【請求項7】 上記肉抜き部分は、上記中心部から外縁
部に延びる複数のブリッジ部を残して形成されることを
特徴とする請求項6記載の膨張弁。
7. The expansion valve according to claim 6, wherein the lightening portion is formed leaving a plurality of bridge portions extending from the central portion to the outer edge portion.
【請求項8】 黄銅で構成した弁本体と、ステンレスで
構成されたパワーエレメントと、温度を圧力に変換する
感温筒と、この感温筒と上記パワーエレメントを連結す
る導管と、上記弁本体の内部空間と上記パワーエレメン
トの圧力空間を区割するステンレスで構成されるダイア
フラムと、このダイアフラムに隣接してその変位を所定
量に制限するためのストッパ部材と、変位を伝達するた
めの作動棒と、弁座と接離する弁体と、この弁体を閉弁
方向にバイアスするためのばねとからなる膨張弁におい
て、上記ストッパ部材はアルミニウム合金によって構成
され、かつ上記ストッパ部材は、その平面である上記ダ
イアフラムとの非接触面にその中央部から外縁部に延び
て設けられた一以上のブリッジ部と、このブリッジ部以
外に設けられた肉抜き部とを有することを特徴とすする
膨張弁。
8. A valve body made of brass, a power element made of stainless steel, a temperature sensing tube for converting temperature into pressure, a conduit connecting the temperature sensing tube and the power element, and the valve body. Diaphragm made of stainless steel for partitioning the internal space of the power element and the pressure space of the power element, a stopper member adjacent to the diaphragm for limiting the displacement thereof to a predetermined amount, and an operating rod for transmitting the displacement. In the expansion valve consisting of a valve body that comes into contact with and separates from the valve seat, and a spring for biasing the valve body in the valve closing direction, the stopper member is made of an aluminum alloy, and the stopper member has a flat surface. And one or more bridge portions provided on the non-contact surface with the diaphragm extending from the central portion to the outer edge portion, and the lightening provided on other than the bridge portion. An expansion valve characterized by having a groove.
JP7175215A 1995-07-11 1995-07-11 Expansion valve Pending JPH0926233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7175215A JPH0926233A (en) 1995-07-11 1995-07-11 Expansion valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7175215A JPH0926233A (en) 1995-07-11 1995-07-11 Expansion valve

Publications (1)

Publication Number Publication Date
JPH0926233A true JPH0926233A (en) 1997-01-28

Family

ID=15992312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7175215A Pending JPH0926233A (en) 1995-07-11 1995-07-11 Expansion valve

Country Status (1)

Country Link
JP (1) JPH0926233A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002267291A (en) * 2001-03-13 2002-09-18 Fuji Koki Corp Thermal expansion valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002267291A (en) * 2001-03-13 2002-09-18 Fuji Koki Corp Thermal expansion valve

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