JP2002147899A - Expansion valve - Google Patents

Expansion valve

Info

Publication number
JP2002147899A
JP2002147899A JP2000346370A JP2000346370A JP2002147899A JP 2002147899 A JP2002147899 A JP 2002147899A JP 2000346370 A JP2000346370 A JP 2000346370A JP 2000346370 A JP2000346370 A JP 2000346370A JP 2002147899 A JP2002147899 A JP 2002147899A
Authority
JP
Japan
Prior art keywords
diaphragm receiving
rod
diaphragm
pressure refrigerant
receiving plate
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
Application number
JP2000346370A
Other languages
Japanese (ja)
Other versions
JP3924119B2 (en
Inventor
Isao Sendo
功 仙道
Kotaro Suzuki
康太郎 鈴木
Satoshi Kawakami
智 川上
Michio Matsumoto
道雄 松本
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.)
TGK Co Ltd
Original Assignee
TGK Co Ltd
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 TGK Co Ltd filed Critical TGK Co Ltd
Priority to JP2000346370A priority Critical patent/JP3924119B2/en
Publication of JP2002147899A publication Critical patent/JP2002147899A/en
Application granted granted Critical
Publication of JP3924119B2 publication Critical patent/JP3924119B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06Details of flow restrictors or expansion valves
    • F25B2341/068Expansion valves combined with a sensor
    • F25B2341/0683Expansion valves combined with a sensor the sensor is disposed in the suction line and influenced by the temperature or the pressure of the suction gas

Landscapes

  • Fluid-Driven Valves (AREA)
  • Temperature-Responsive Valves (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

PROBLEM TO BE SOLVED: To ensure stabilized dynamic characteristics of an expansion valve where a reaction pushing a diaphragm receiving board sideways acts on the diaphragm receiving board from a rod by preventing a sliding resistance from being generated irregularly in the diaphragm receiving board. SOLUTION: A foot piece 33a sliding on a fixed wall 31a on the periphery is projected from a diaphragm receiving board 33 so that sideward movement of the diaphragm receiving board 33 due to reaction from a rod 20 is regulated thus forming the sliding surface of the foot piece 33a into a smooth convex surface with respect to the fixed wall 31a.

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】この発明は、冷凍サイクルに
おいて蒸発器に送り込まれる冷媒の流量制御を行いつつ
冷媒を断熱膨張させ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 for adiabatically expanding a refrigerant while controlling the flow rate of the refrigerant sent to an evaporator in a refrigeration cycle.

【0002】[0002]

【従来の技術】膨張弁には各種のタイプがあるが、蒸発
器に送り込まれる高圧冷媒が通る高圧冷媒流路の途中を
細く絞って形成された弁座孔に対して上流側から対向す
るように弁体を配置し、蒸発器から送り出される低圧冷
媒の温度と圧力に対応して弁体を開閉動作させるように
した膨張弁が広く用いられている。
2. Description of the Related Art There are various types of expansion valves. An expansion valve is opposed to a valve seat hole formed by narrowing the middle of a high-pressure refrigerant flow path through which a high-pressure refrigerant is fed into an evaporator from an upstream side. An expansion valve is widely used in which a valve element is arranged in such a manner that the valve element opens and closes in accordance with the temperature and pressure of the low-pressure refrigerant sent from the evaporator.

【0003】そのような膨張弁においては、蒸発器から
送り出される低圧冷媒の温度と圧力に対応して動作する
ダイアフラムによって、軸線方向に進退自在なロッドを
介して弁体を開閉動作させるようにしている。
In such an expansion valve, a valve body is opened and closed by an axially movable rod by means of a diaphragm which operates in accordance with the temperature and pressure of the low-pressure refrigerant sent from the evaporator. I have.

【0004】そのような膨張弁の動作が敏感になりすぎ
ないようにするために、本件の出願人は、ダイアフラム
に当接するダイアフラム受け盤からロッドに対して偶力
が加わるように構成した膨張弁を発明して特許出願して
ある(特願平11−273559号)。
In order to prevent the operation of such an expansion valve from becoming too sensitive, the applicant of the present application has proposed an expansion valve in which a couple is applied to a rod from a diaphragm receiving plate abutting on the diaphragm. And applied for a patent (Japanese Patent Application No. 11-273559).

【0005】その膨張弁では、ロッドが軸線方向にスラ
イドする際に偶力の作用により摩擦抵抗が発生するの
で、高圧冷媒に圧力変動があっても弁体の動作がそれに
対して敏感に反応せず、高圧冷媒の圧力変動に対して動
作の安定した膨張弁を得ることができる。
In the expansion valve, when the rod slides in the axial direction, a frictional resistance is generated by the action of a couple, so that even if there is a pressure fluctuation in the high-pressure refrigerant, the operation of the valve body reacts sensitively to the fluctuation. Therefore, it is possible to obtain an expansion valve that operates stably with respect to pressure fluctuations of the high-pressure refrigerant.

【0006】上述のような膨張弁においては、ダイアフ
ラム受け盤からロッドに対して加わる偶力の反力が、ダ
イアフラム受け盤を側方(盤面に沿う方向)に押すよう
にロッドからダイアフラム受け盤に作用するので、図4
に示されるように、周囲の固定壁に摺接する足片90a
をダイアフラム受け盤90に突出形成してある。
In the above-described expansion valve, a couple of reaction forces acting on the rod from the diaphragm receiving plate pushes the diaphragm receiving plate laterally (in a direction along the plate surface) from the rod to the diaphragm receiving plate. Since it works, FIG.
As shown in the figure, the foot piece 90a slidingly contacting the surrounding fixed wall
Are formed on the diaphragm receiving board 90 so as to protrude.

【0007】[0007]

【発明が解決しようとする課題】図5に示されるよう
に、足片90aは周囲の固定壁91に対して稜線部分で
摺接する。したがって、ダイアフラム受け盤90のふら
つき等によって、摺接部分が足片90aの二つの稜線だ
ったり一つだけになったりする場合が発生して、ダイア
フラム受け盤90が周囲の固定壁91から受ける摺動抵
抗が不規則に変化し、その結果膨張弁の動作特性が不安
定なものになってしまう場合がある。
As shown in FIG. 5, the foot piece 90a is in sliding contact with the surrounding fixed wall 91 at the ridge. Therefore, the sliding portion may be two ridge lines of the foot piece 90a or only one due to wobbling of the diaphragm receiving board 90 or the like, and the sliding that the diaphragm receiving board 90 receives from the surrounding fixed wall 91 may occur. Dynamic resistance may change irregularly, resulting in unstable operating characteristics of the expansion valve.

【0008】そこで本発明は、ダイアフラム受け盤を側
方に押す反力がロッドからダイアフラム受け盤に作用す
る膨張弁において、ダイアフラム受け盤に生じる摺動抵
抗が不規則にならないようにして、安定した動作特性を
得ることができる膨張弁を提供することを目的とする。
In view of the above, the present invention provides an expansion valve in which a reaction force for pushing the diaphragm receiving plate to the side acts on the diaphragm receiving plate from the rod so that the sliding resistance generated on the diaphragm receiving plate does not become irregular, and the present invention provides a stable valve. An object of the present invention is to provide an expansion valve capable of obtaining operating characteristics.

【0009】[0009]

【課題を解決するための手段】上記の目的を達成するた
め、本発明の膨張弁は、蒸発器に送り込まれる高圧冷媒
が通る高圧冷媒流路の途中を細く絞って形成された弁座
孔に対して上流側から対向するように弁体を配置して、
蒸発器から送り出されて低圧冷媒流路を通る低圧冷媒の
温度と圧力に対応して変位するダイアフラムに当接する
ダイアフラム受け盤と弁体との間に軸線方向に進退自在
にロッドを挟設し、ロッドを介して弁体を開閉動作させ
るようにした膨張弁であって、ダイアフラム受け盤を側
方に押す反力がロッドからダイアフラム受け盤に作用す
る膨張弁において、ダイアフラム受け盤がロッドからの
反力によって側方に移動するのを規制するように周囲の
固定壁に摺接する足片をダイアフラム受け盤から突設し
て、固定壁に対する足片の摺接面を滑らかな凸状曲面に
形成したものである。
In order to achieve the above object, an expansion valve according to the present invention is provided in a valve seat hole formed by narrowing the middle of a high-pressure refrigerant flow path through which a high-pressure refrigerant sent to an evaporator passes. Arrange the valve body so as to face from the upstream side,
A rod is slidably moved in the axial direction between a diaphragm receiving plate and a valve body that comes into contact with a diaphragm that is displaced in accordance with the temperature and pressure of the low-pressure refrigerant that is sent out from the evaporator and passes through the low-pressure refrigerant flow path, An expansion valve in which a valve body is opened and closed via a rod, wherein a reaction force for pushing a diaphragm receiving plate to the side acts on the diaphragm receiving plate from the rod. A foot piece that slides on the surrounding fixed wall is provided so as to protrude from the diaphragm receiving plate so as to restrict lateral movement by force, and a sliding surface of the foot piece with the fixed wall is formed into a smooth convex curved surface. Things.

【0010】なお、固定壁に対する足片の摺接面の断面
形状が、ダイアフラム受け盤の盤面と平行な断面におい
て、外方に凸で突端が滑らかなアール状に丸められたV
字状或いはU字状、又は球面状であってもよい。
The cross-sectional shape of the sliding surface of the foot piece with respect to the fixed wall is V-shaped in a cross section parallel to the surface of the diaphragm receiving board, which is outwardly convex and whose tip is rounded in a round shape.
The shape may be a letter shape, a U shape, or a spherical shape.

【0011】[0011]

【発明の実施の形態】図面を参照して本発明の実施例を
説明する。図1において、1は蒸発器、2は圧縮機、3
は凝縮器、4は、凝縮器3の出口側に接続されて高圧の
液体冷媒を収容する受液器、10は膨張弁である。これ
らによって冷凍サイクルが形成されており、例えば自動
車の室内冷房装置(カーエアコン)に用いられる。
Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is an evaporator, 2 is a compressor, 3
Is a condenser, 4 is a liquid receiver connected to the outlet side of the condenser 3 and contains a high-pressure liquid refrigerant, and 10 is an expansion valve. These components form a refrigeration cycle, and are used, for example, for indoor cooling devices (car air conditioners) of automobiles.

【0012】膨張弁10の本体ブロック11には、蒸発
器1から圧縮機2へ送り出される低温低圧の冷媒ガスを
通すための低圧冷媒流路12と、蒸発器1に送り込まれ
る高温高圧の冷媒液を通して断熱膨張させるための高圧
冷媒流路13とが形成されている。
The main body block 11 of the expansion valve 10 has a low-pressure refrigerant passage 12 through which a low-temperature and low-pressure refrigerant gas sent from the evaporator 1 to the compressor 2 passes, and a high-temperature and high-pressure refrigerant liquid sent to the evaporator 1. And a high-pressure refrigerant channel 13 for adiabatic expansion through the passage.

【0013】低圧冷媒流路12は、入口側の端部が蒸発
器1の出口に接続され、出口側が圧縮機2の入口に接続
されている。高圧冷媒流路13は、入口側の端部が受液
器4の出口に接続され、出口側が蒸発器1の入口に接続
されている。
The low-pressure refrigerant passage 12 has an inlet end connected to the outlet of the evaporator 1 and an outlet connected to the inlet of the compressor 2. The high-pressure refrigerant flow path 13 has an inlet-side end connected to the outlet of the liquid receiver 4, and an outlet connected to the inlet of the evaporator 1.

【0014】低圧冷媒流路12と高圧冷媒流路13とは
互いに平行に形成されており、これに垂直な貫通孔14
が低圧冷媒流路12と高圧冷媒流路13との間を貫通し
ている。また、低圧冷媒流路12の途中から側方に抜け
るように、貫通孔14と同じ向きに形成された開口部に
は、パワーエレメント30が取り付けられている。
The low-pressure refrigerant flow path 12 and the high-pressure refrigerant flow path 13 are formed in parallel with each other.
Penetrates between the low-pressure refrigerant channel 12 and the high-pressure refrigerant channel 13. In addition, a power element 30 is attached to an opening formed in the same direction as the through hole 14 so as to pass sideways from the middle of the low-pressure refrigerant flow channel 12.

【0015】高圧冷媒流路13の途中には、流路面積を
途中で狭く絞った形の弁座孔15が中央部に形成されて
いて、その弁座孔15に上流側から対向して球状の弁体
16が配置されている。
In the middle of the high-pressure refrigerant flow path 13, a valve seat hole 15 is formed at the center, the shape of which is narrowed in the middle of the flow path area. Is disposed.

【0016】その結果、弁体16と弁座孔15の入口部
との間の隙間の最も狭い部分が高圧冷媒流路13の絞り
部になり、そこから蒸発器1に到る下流側の流路内にお
いて、高圧冷媒が断熱膨張する。弁体16は、圧縮コイ
ルスプリング17によって弁座孔15に接近する方向
(即ち、閉じ方向)に付勢されている。18はスプリン
グ受けである。
As a result, the narrowest part of the gap between the valve element 16 and the inlet of the valve seat hole 15 becomes the throttle part of the high-pressure refrigerant flow path 13, from which the downstream flow reaching the evaporator 1 reaches. In the passage, the high-pressure refrigerant adiabatically expands. The valve body 16 is urged by the compression coil spring 17 in a direction approaching the valve seat hole 15 (that is, a closing direction). 18 is a spring receiver.

【0017】貫通孔14に挿通されたロッド20は、軸
線方向に摺動自在に設けられていて、その上端はパワー
エレメント30の裏面付近に達し、中間部分が低圧冷媒
流路12を垂直に横切って貫通孔14内に嵌合し、下端
は、弁座孔15内を通って弁体16の頭部に当接してい
る。
The rod 20 inserted into the through hole 14 is provided so as to be slidable in the axial direction, the upper end thereof reaches near the back surface of the power element 30, and the middle portion vertically crosses the low-pressure refrigerant flow channel 12. The lower end passes through the valve seat hole 15 and contacts the head of the valve body 16.

【0018】なおロッド20は、弁座孔15の壁面との
間が冷媒流路になるよう、弁座孔15に比べて細く形成
されている。また、プラスチック製のガイド筒19が、
低圧冷媒流路12を横切ってロッド20を囲んで配置さ
れている。
The rod 20 is formed to be thinner than the valve seat hole 15 so that a space between the rod 20 and the wall surface of the valve seat hole 15 serves as a coolant flow path. Also, the plastic guide cylinder 19 is
It is arranged so as to surround the rod 20 across the low-pressure refrigerant flow path 12.

【0019】パワーエレメント30の上半部は、厚い金
属板製のハウジング31と可撓性のある金属製薄板(例
えば厚さ0.1mmのステンレス鋼板)からなるダイア
フラム32によって気密に囲まれている。
The upper half of the power element 30 is hermetically surrounded by a housing 31 made of a thick metal plate and a diaphragm 32 made of a flexible thin metal plate (for example, a stainless steel plate having a thickness of 0.1 mm). .

【0020】その気密空間30a内には、冷媒流路1
2,13内に流されている冷媒と同じか又は性質の似て
いる飽和蒸気状態のガスが封入されていて、ガス封入用
の注入孔は、栓34によって閉塞されている。
In the airtight space 30a, a refrigerant flow path 1 is provided.
A gas in a saturated vapor state having the same or similar properties as the refrigerant flowing in the refrigerants 2 and 13 is sealed therein, and a gas injection hole is closed by a stopper 34.

【0021】ダイアフラム32の裏面に当接するよう
に、大きな皿状に形成された金属製のダイアフラム受け
盤33が配置されていて、ダイアフラム受け盤33の裏
面にロッド20の端部が当接している。
A large dish-shaped metal diaphragm receiving plate 33 is disposed so as to abut against the back surface of the diaphragm 32, and the end of the rod 20 abuts on the back surface of the diaphragm receiving plate 33. .

【0022】ロッド20は一本の真っ直ぐな棒状である
が、ロッド20が当接するダイアフラム受け盤33の面
がロッド20の軸線に対して斜めに傾いて形成されてい
る(斜面36)。
The rod 20 is in the form of a single straight rod, but the surface of the diaphragm receiving plate 33 with which the rod 20 comes into contact is formed obliquely inclined with respect to the axis of the rod 20 (slope 36).

【0023】40は、パワーエレメント30が低圧冷媒
の急激な温度変化に影響されないように、ダイアフラム
32の裏面への低圧冷媒の回り込みを規制するために、
ダイアフラム受け盤33に形成された冷媒通路である。
Numeral 40 is for restricting the low-pressure refrigerant from flowing to the back surface of the diaphragm 32 so that the power element 30 is not affected by a sudden change in the temperature of the low-pressure refrigerant.
This is a refrigerant passage formed in the diaphragm receiving board 33.

【0024】このように構成された膨張弁10において
は、低圧冷媒流路12内を流れる低圧冷媒の温度が下が
ると、ダイアフラム32の温度が下がって、パワーエレ
メント30内の飽和蒸気ガスがダイアフラム32の内表
面で凝縮する。
In the expansion valve 10 configured as described above, when the temperature of the low-pressure refrigerant flowing in the low-pressure refrigerant flow path 12 decreases, the temperature of the diaphragm 32 decreases, and the saturated steam gas in the power element 30 is removed from the diaphragm 32. Condenses on the inner surface of

【0025】すると、パワーエレメント30内の圧力が
下がってダイアフラム32とダイアフラム受け盤33が
変位するので、ロッド20が圧縮コイルスプリング17
に押されて移動し、その結果、弁体16が弁座孔15側
に移動して高圧冷媒の流路面積が狭くなって、蒸発器1
に送り込まれる冷媒の流量が減る。
Then, the pressure in the power element 30 decreases, and the diaphragm 32 and the diaphragm receiving plate 33 are displaced.
As a result, the valve element 16 moves to the valve seat hole 15 side, and the flow passage area of the high-pressure refrigerant is reduced.
The flow rate of the refrigerant sent to is reduced.

【0026】低圧冷媒流路12内を流れる低圧冷媒の温
度が上がると、上記と逆の動作により、ダイアフラム受
け盤33で押されたロッド20によって弁体16が弁座
孔15から離れる方向に移動させられ、高圧冷媒の流路
面積が広がって、蒸発器1に送り込まれる高圧冷媒の流
量が増える。図1は、全開状態を示している。
When the temperature of the low-pressure refrigerant flowing in the low-pressure refrigerant flow path 12 rises, the valve body 16 is moved in a direction away from the valve seat hole 15 by the rod 20 pushed by the diaphragm receiving plate 33 by the reverse operation. As a result, the flow path area of the high-pressure refrigerant increases, and the flow rate of the high-pressure refrigerant sent to the evaporator 1 increases. FIG. 1 shows a fully opened state.

【0027】このような膨張弁10において、ロッド2
0が当接するダイアフラム受け盤33側の面がロッド2
0の軸線に対して傾いた斜面36になっているので、パ
ワーエレメント30と圧縮コイルスプリング17とから
ロッド20が受ける力は、ロッド20の軸線方向を回転
させようとする偶力としても作用する。
In such an expansion valve 10, the rod 2
0 is the rod 2
Since the inclined surface 36 is inclined with respect to the axis 0, the force received by the rod 20 from the power element 30 and the compression coil spring 17 also acts as a couple force for rotating the rod 20 in the axial direction. .

【0028】その結果、ロッド20が進退する際には貫
通孔14の内面壁との間において摩擦抵抗が発生するの
で、高圧冷媒流路13内の高圧冷媒に圧力変動があった
とき、ロッド20の動作(即ち弁体16の開閉動作)が
それに対して敏感に反応しない。
As a result, when the rod 20 moves forward and backward, frictional resistance is generated between the rod 20 and the inner wall of the through-hole 14. (I.e., the opening / closing operation of the valve element 16) does not react sensitively thereto.

【0029】このような膨張弁10では、斜面36にお
いて、ダイアフラム受け盤33を側方(盤面に沿う方向
であり、図1において右方)に押す反力がロッド20か
らダイアフラム受け盤33に対して作用する。
In such an expansion valve 10, a reaction force that pushes the diaphragm receiving plate 33 to the side (in the direction along the plate surface, to the right in FIG. 1) on the slope 36 is applied to the diaphragm receiving plate 33 from the rod 20. Act.

【0030】そこでダイアフラム受け盤33には、図2
に単体でも示されるように、ロッド20からの反力によ
ってダイアフラム受け盤33が側方に移動するのを規制
するように、パワーエレメント30のハウジング31の
下端筒状部31aの内面に摺接する足片33aが突設さ
れている。
Therefore, the diaphragm receiving board 33 has
As shown in FIG. 3, a foot that slides on the inner surface of the lower cylindrical portion 31a of the housing 31 of the power element 30 so as to restrict the diaphragm receiving board 33 from moving laterally due to the reaction force from the rod 20. A piece 33a protrudes.

【0031】なお、この実施例では足片33aはダイア
フラム受け盤33の一部を折り曲げて形成されている
が、ダイアフラム受け盤33に他の部材を連結して形成
しても差し支えない。
In this embodiment, the foot piece 33a is formed by bending a part of the diaphragm receiving board 33, but it may be formed by connecting another member to the diaphragm receiving board 33.

【0032】この足片33aは、図1に示されるよう
に、本体ブロック11に取り付けられるパワーエレメン
ト30のハウジング31の筒状部31aの内周面に沿っ
てその筒状部31aの軸線方向と略平行に長く配置され
ている。
As shown in FIG. 1, the foot piece 33a extends in the axial direction of the cylindrical portion 31a along the inner peripheral surface of the cylindrical portion 31a of the housing 31 of the power element 30 attached to the main body block 11. It is arranged substantially parallel and long.

【0033】この実施例においては、足片33aは、図
3に示されるように、ダイアフラム受け盤33の盤面と
平行な断面において、外方に凸で突端が滑らかなアール
状に丸められたV字状の断面形状に形成されて、ダイア
フラム受け盤33の斜面36の背面側の位置に一本だけ
設けられており、ロッド20から受ける反力によりダイ
アフラム受け盤33が側方に移動しようとすると、足片
33aの外面側が筒状部31aの内周面に押し付けられ
る位置にある。
In this embodiment, as shown in FIG. 3, the foot piece 33a has a V-shaped section which is outwardly convex and whose tip is smoothly rounded in a cross section parallel to the board surface of the diaphragm receiving board 33. It is formed in a U-shaped cross-sectional shape, and only one is provided at a position on the back side of the slope 36 of the diaphragm receiving board 33, and when the diaphragm receiving board 33 tries to move sideways due to the reaction force received from the rod 20. The outer surface side of the foot piece 33a is located at a position pressed against the inner peripheral surface of the tubular portion 31a.

【0034】足片33aをこのようにダイアフラム受け
盤33の斜面36の背面側に設けたことにより、ロッド
20から受ける反力によってダイアフラム受け盤33が
側方(図1において右方)に移動してしまうことが規制
される。
By providing the foot piece 33a on the back side of the slope 36 of the diaphragm receiving board 33 in this manner, the diaphragm receiving board 33 moves to the side (to the right in FIG. 1) by the reaction force received from the rod 20. Is regulated.

【0035】そして、足片33aが、滑らかなアール状
に丸められたV字状断面の突端部分でハウジング31の
筒状部31aと摺接するので、ダイアフラム受け盤33
がふらついて足片33aの向きが変動しても、ハウジン
グ31の筒状部31aに対する摺接面の状態はほとんど
変わらない。その結果、ダイアフラム受け盤33がハウ
ジング31の筒状部31aの内周面から受ける摺動抵抗
がばらつかず、膨張弁10が常に安定した特性で動作す
る。
Then, the foot piece 33a slides on the cylindrical portion 31a of the housing 31 at the protruding end portion of the V-shaped cross section which is rounded into a smooth radius, so that the diaphragm receiving board 33
Even if the direction of the foot piece 33a fluctuates due to wobble, the state of the sliding contact surface of the housing 31 with respect to the cylindrical portion 31a hardly changes. As a result, the sliding resistance that the diaphragm receiving board 33 receives from the inner peripheral surface of the cylindrical portion 31a of the housing 31 does not vary, and the expansion valve 10 always operates with stable characteristics.

【0036】なお、足片33aは、V字状断面のV部分
の角度θが90〜95°であると、上述のような動作が
安定して得られ、またダイアフラム受け盤33を折り曲
げて製造する製造上も問題が生じない。
When the angle θ of the V portion of the V-shaped cross section is 90 to 95 °, the above-mentioned operation is stably obtained, and the foot piece 33a is manufactured by bending the diaphragm receiving plate 33. There is no problem in manufacturing.

【0037】また、パワーエレメント30のハウジング
31のうちダイアフラム受け盤33の外縁部分を囲む位
置にある部分31bが、本体ブロック11に近い側から
ダイアフラム32に近い側へ(即ち、ダイアフラム受け
盤33の全開時にダイアフラム受け盤33の外縁部分に
面する位置から全閉時にダイアフラム受け盤33の外縁
部分に面する位置方向へ)次第に大きな径に広がって形
成されている。この実施例では、その部分31bがアー
ル面に形成されている。ただし、テーパ面等であっても
よい。
Further, a portion 31b of the housing 31 of the power element 30 at a position surrounding the outer edge of the diaphragm receiving plate 33 is moved from the side closer to the main body block 11 to the side closer to the diaphragm 32 (that is, the diaphragm receiving plate 33). The diameter gradually increases from the position facing the outer edge portion of the diaphragm receiving plate 33 when fully opened (to the position facing the outer edge portion of the diaphragm receiving plate 33 when fully closed). In this embodiment, the portion 31b is formed on the radius surface. However, it may be a tapered surface or the like.

【0038】したがって、ダイアフラム受け盤33が例
えば紙面と垂直方向に横振れした状態になっても、図1
に示される全開状態のときダイアフラム受け盤33がハ
ウジング31にガイドされて最も内側位置に寄せられ、
そこから少しでも閉弁方向に移行すればダイアフラム受
け盤33の外縁がハウジング31に触れなくなる。した
がって、ダイアフラム受け盤33は足片33a以外の部
分では摺動抵抗を受けることがなく安定した動作をす
る。
Therefore, even if the diaphragm receiving plate 33 is swayed, for example, in the direction perpendicular to the plane of FIG.
When the diaphragm receiving plate 33 is fully opened, the diaphragm receiving plate 33 is guided by the housing 31 and moved to the innermost position,
If a slight transition is made in the valve closing direction, the outer edge of the diaphragm receiving plate 33 will not touch the housing 31. Therefore, the diaphragm receiving plate 33 operates stably without receiving sliding resistance in portions other than the foot piece 33a.

【0039】なお、本発明は上記実施例に限定されるも
のではなく、例えばハウジング31の筒状部31aに対
する足片33aの摺接面は、滑らかな凸状曲面に形成さ
れていればよく、V字状に限らずU字状その他どのよう
な形状であっても差し支えなく、球面状であってもよ
い。また、足片33aがダイアフラム受け盤33から複
数突設されていてもよい。
The present invention is not limited to the above embodiment. For example, the sliding contact surface of the foot piece 33a with the cylindrical portion 31a of the housing 31 may be formed as a smooth convex curved surface. The shape is not limited to the V shape, and may be a U shape or any other shape, and may be a spherical shape. Further, a plurality of foot pieces 33a may be provided from the diaphragm receiving board 33.

【0040】[0040]

【発明の効果】本発明によれば、ダイアフラム受け盤が
ロッドからの反力によって側方に移動するのを規制する
ように周囲の固定壁に摺接する足片の摺接面を滑らかな
凸状曲面に形成したことにより、ダイアフラム受け盤に
生じる摺動抵抗が不規則にならず、膨張弁が安定した特
性で作動する優れた効果を有する。
According to the present invention, the sliding contact surface of the foot piece which slides on the surrounding fixed wall so as to restrict the diaphragm receiving plate from moving sideways due to the reaction force from the rod has a smooth convex shape. Due to the curved surface, the sliding resistance generated in the diaphragm receiver is not irregular, and the expansion valve has an excellent effect of operating with stable characteristics.

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

【図1】本発明の実施例の膨張弁の縦断面図である。FIG. 1 is a longitudinal sectional view of an expansion valve according to an embodiment of the present invention.

【図2】本発明の実施例のダイアフラム受け盤の斜視図
である。
FIG. 2 is a perspective view of a diaphragm receiving board according to the embodiment of the present invention.

【図3】本発明の実施例のダイアフラム受け盤から突設
された足片の、ダイアフラム受け盤の盤面に平行な断面
における断面図である。
FIG. 3 is a cross-sectional view of a foot piece protruding from a diaphragm receiving board according to an embodiment of the present invention in a cross section parallel to the board surface of the diaphragm receiving board.

【図4】従来のダイアフラム受け盤の斜視図である。FIG. 4 is a perspective view of a conventional diaphragm receiving board.

【図5】従来のダイアフラム受け盤から突設された足片
の、ダイアフラム受け盤の盤面に平行な断面における断
面図である。
FIG. 5 is a cross-sectional view of a foot piece protruding from a conventional diaphragm receiving board in a cross section parallel to the surface of the diaphragm receiving board.

【符号の説明】[Explanation of symbols]

16 弁体 20 ロッド 30 パワーエレメント 31 ハウジング 31a 筒状部(固定壁) 32 ダイアフラム 33 ダイアフラム受け盤 33a 足片 36 斜面 DESCRIPTION OF SYMBOLS 16 Valve body 20 Rod 30 Power element 31 Housing 31a Cylindrical part (fixed wall) 32 Diaphragm 33 Diaphragm receiving board 33a Foot 36 Slope

───────────────────────────────────────────────────── フロントページの続き (72)発明者 川上 智 東京都八王子市椚田町1211番地4 株式会 社テージーケー内 (72)発明者 松本 道雄 東京都八王子市椚田町1211番地4 株式会 社テージーケー内 Fターム(参考) 3H056 AA01 BB01 CA07 CB03 CB07 CD06 DD10 EE03 GG08 GG13 3H057 AA04 BB06 CC06 DD05 EE01 HH02 HH05 HH16 HH18  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Kawakami 1211-4 Nukuda-cho, Hachioji-shi, Tokyo Inside T-G Co., Ltd. (72) Inventor Michio Matsumoto 1211-4 Nugita-machi, Hachioji-shi, Tokyo F. Inside T-G Co., Ltd. F Terms (reference) 3H056 AA01 BB01 CA07 CB03 CB07 CD06 DD10 EE03 GG08 GG13 3H057 AA04 BB06 CC06 DD05 EE01 HH02 HH05 HH16 HH18

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】蒸発器に送り込まれる高圧冷媒が通る高圧
冷媒流路の途中を細く絞って形成された弁座孔に対して
上流側から対向するように弁体を配置して、上記蒸発器
から送り出されて低圧冷媒流路を通る低圧冷媒の温度と
圧力に対応して変位するダイアフラムに当接するダイア
フラム受け盤と上記弁体との間に軸線方向に進退自在に
ロッドを挟設し、上記ロッドを介して上記弁体を開閉動
作させるようにした膨張弁であって、 上記ダイアフラム受け盤を側方に押す反力が上記ロッド
から上記ダイアフラム受け盤に作用する膨張弁におい
て、 上記ダイアフラム受け盤が上記ロッドからの反力によっ
て側方に移動するのを規制するように周囲の固定壁に摺
接する足片を上記ダイアフラム受け盤から突設して、上
記固定壁に対する上記足片の摺接面を滑らかな凸状曲面
に形成したことを特徴とする膨張弁。
1. A valve element is disposed so as to oppose a valve seat hole formed by narrowing the middle of a high-pressure refrigerant flow path through which a high-pressure refrigerant fed into an evaporator flows from an upstream side. A rod is slidably moved in the axial direction between the diaphragm receiving plate and the valve body that abuts on the diaphragm that is displaced in accordance with the temperature and pressure of the low-pressure refrigerant that is sent out from the low-pressure refrigerant flow path, An expansion valve configured to open and close the valve element via a rod, wherein a reaction force for pushing the diaphragm receiving plate to the side acts on the diaphragm receiving plate from the rod, wherein the diaphragm receiving plate A foot is slidably contacted with a surrounding fixed wall to protrude from the diaphragm receiving plate so as to restrict the lateral movement by the reaction force from the rod, and the foot is slid on the fixed wall. Expansion valve, characterized in that the formation of the surface in a smooth convex curved surface.
【請求項2】上記固定壁に対する上記足片の摺接面の断
面形状が、上記ダイアフラム受け盤の盤面と平行な断面
において、外方に凸で突端が滑らかなアール状に丸めら
れたV字状或いはU字状、又は球面状である請求項1記
載の膨張弁。
2. A V-shape in which a cross-sectional shape of a sliding surface of the foot piece with respect to the fixed wall is outwardly convex and a protruding end is smoothly rounded in a cross section parallel to the board surface of the diaphragm receiving board. The expansion valve according to claim 1, wherein the expansion valve has a shape of a U, a U, or a sphere.
JP2000346370A 2000-11-14 2000-11-14 Expansion valve Expired - Lifetime JP3924119B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000346370A JP3924119B2 (en) 2000-11-14 2000-11-14 Expansion valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000346370A JP3924119B2 (en) 2000-11-14 2000-11-14 Expansion valve

Publications (2)

Publication Number Publication Date
JP2002147899A true JP2002147899A (en) 2002-05-22
JP3924119B2 JP3924119B2 (en) 2007-06-06

Family

ID=18820252

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000346370A Expired - Lifetime JP3924119B2 (en) 2000-11-14 2000-11-14 Expansion valve

Country Status (1)

Country Link
JP (1) JP3924119B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011007355A (en) * 2009-06-23 2011-01-13 Fuji Koki Corp Diaphragm-actuated fluid control valve
JP2020071006A (en) * 2018-11-02 2020-05-07 株式会社不二工機 Expansion valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011007355A (en) * 2009-06-23 2011-01-13 Fuji Koki Corp Diaphragm-actuated fluid control valve
US9765904B2 (en) 2009-06-23 2017-09-19 Fujikoki Corporation Diaphragm-actuated fluid control valve
JP2020071006A (en) * 2018-11-02 2020-05-07 株式会社不二工機 Expansion valve
JP7217504B2 (en) 2018-11-02 2023-02-03 株式会社不二工機 expansion valve

Also Published As

Publication number Publication date
JP3924119B2 (en) 2007-06-06

Similar Documents

Publication Publication Date Title
JP3576886B2 (en) Expansion valve
JPH08145505A (en) Expansion valve
KR20040080959A (en) Expansion Valve
JP3452719B2 (en) Expansion valve
JP6231509B2 (en) Throttle device and refrigeration cycle
JP2003090647A (en) Expansion valve
JP2002147899A (en) Expansion valve
JP3897974B2 (en) Expansion valve
JP3481036B2 (en) Expansion valve
JP3507615B2 (en) Expansion valve
JP3485748B2 (en) Expansion valve
JP3507616B2 (en) Expansion valve
JP3782896B2 (en) Supercooling control type expansion valve
JPH10238903A (en) Expansion valve
JP2001159465A (en) Structure of seal part
JP3507612B2 (en) Expansion valve
JP3859913B2 (en) Expansion valve
JP3780127B2 (en) Expansion valve
JPH09113072A (en) Expansion valve
JP2001153498A (en) Supercooling degree control type expansion valve
JP2001091109A (en) Expansion valve
JPH10205926A (en) Expansion valve
JP2001091108A (en) Expansion valve
JP2001091106A (en) Expansion valve
JP2001091107A (en) Expansion valve

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20040602

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20061130

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20061214

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070112

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20070215

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20070223

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 3924119

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100302

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120302

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150302

Year of fee payment: 8

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term