JPH05346276A - Expansion valve - Google Patents
Expansion valveInfo
- Publication number
- JPH05346276A JPH05346276A JP4123409A JP12340992A JPH05346276A JP H05346276 A JPH05346276 A JP H05346276A JP 4123409 A JP4123409 A JP 4123409A JP 12340992 A JP12340992 A JP 12340992A JP H05346276 A JPH05346276 A JP H05346276A
- Authority
- JP
- Japan
- Prior art keywords
- pressure side
- valve
- orifice
- side flow
- valve body
- 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
Links
Landscapes
- Temperature-Responsive Valves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、冷凍サイクルに組み込
まれる膨張弁に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion valve incorporated in a refrigeration cycle.
【０００２】[0002]
【従来の技術】従来より、例えば図５に示したように、
カーエアコン等の冷凍サイクルに組み込まれる膨張弁１
００は、真鍮製の弁本体１０１の内部を高圧側流路１０
２と低圧側流路１０３とに区画する区画壁１０４にオリ
フィス１０５が形成されている。そして、弁本体１０１
内には、低圧側流路１０３とオリフィス１０５を貫通す
る作動棒１０６が軸方向に移動自在に配されている。ま
た、作動棒１０６の先端部には、オリフィス１０５の開
度を制御するボール弁１０７が当接しており、そのボー
ル弁１０７にはコイルスプリング１０８の弁座１０９が
取り付けられている。2. Description of the Related Art Conventionally, for example, as shown in FIG.
Expansion valve 1 incorporated in the refrigeration cycle of car air conditioners, etc.
00 indicates the high pressure side flow passage 10 inside the valve body 101 made of brass.
An orifice 105 is formed on a partition wall 104 that partitions the low pressure side flow path 103 and the low pressure side flow path 103. And the valve body 101
An operating rod 106 that penetrates the low-pressure side flow path 103 and the orifice 105 is disposed inside thereof so as to be movable in the axial direction. A ball valve 107 that controls the opening of the orifice 105 is in contact with the tip of the operating rod 106, and a valve seat 109 of a coil spring 108 is attached to the ball valve 107.
【０００３】[0003]
【発明が解決しようとする課題】ところが、従来の膨張
弁１００においては、ボール弁１０７のリフト時に、作
動棒１０６の先端部を支持する部材が存在しないため、
図６に示したように、作動棒１０６が傾いてしまい、ボ
ール弁１０７のリフト量が乱れが生じる（図７のグラフ
参照：実線がボール弁１０７の下降時を示し、破線がボ
ール弁１０７の上昇時を示す）。よって、所望の冷媒の
流量が得られないので、冷凍サイクルの性能を低下させ
るという課題があった。また、本発明者等は、ボール弁
１０７が最大リフトして冷媒が高流速で流れている際
に、ボール弁１０７とオリフィス１０５との間を通過す
る際に急激に膨張して生じた気泡がオリフィス１０５と
作動棒１０６との間を通過する際の少量の圧縮作用によ
り破裂するとき、オリフィス１０５が侵食されることを
発見した。However, in the conventional expansion valve 100, when the ball valve 107 is lifted, there is no member that supports the tip end portion of the actuation rod 106.
As shown in FIG. 6, the actuation rod 106 is tilted, and the lift amount of the ball valve 107 is disturbed (see the graph in FIG. 7: the solid line indicates the time when the ball valve 107 is descending, and the broken line indicates the ball valve 107). Indicates the time of rise). Therefore, since the desired flow rate of the refrigerant cannot be obtained, there is a problem that the performance of the refrigeration cycle is deteriorated. Further, the present inventors have found that when the ball valve 107 is maximally lifted and the refrigerant is flowing at a high flow rate, bubbles generated by rapid expansion when passing between the ball valve 107 and the orifice 105 are generated. It has been discovered that the orifice 105 is eroded when it ruptures due to a small amount of compressive action as it passes between the orifice 105 and the actuation rod 106.
【０００４】そのオリフィス１０５の侵食現象が進む
と、冷凍サイクルの停止時、すなわち、ボール弁１０７
が区画壁１０４に当接する閉弁時でも、高圧側流路１０
２と低圧側流路１０３とが連通してしまい、高圧側流路
１０２から低圧側流路１０３へ冷媒が流出し、異音が発
生する不具合を生じる。この対応策として、オリフィス
１０５をコーティングしたり、弁本体１０１の硬度を向
上させることが考えられるが、製造コストが上昇してし
まう。本発明は、弁体のリフト時に作動棒が傾くことを
防止するとともに、製造コストを上昇させることなく絞
り部の侵食を防止する膨張弁の提供を目的とする。When the erosion phenomenon of the orifice 105 progresses, when the refrigeration cycle is stopped, that is, the ball valve 107.
Even when the valve is in contact with the partition wall 104 and is closed, the high pressure side flow path 10
2 and the low-pressure side flow passage 103 are communicated with each other, the refrigerant flows out from the high-pressure side flow passage 102 to the low-pressure side flow passage 103, and an abnormal noise occurs. As a countermeasure against this, coating the orifice 105 or improving the hardness of the valve body 101 can be considered, but the manufacturing cost increases. It is an object of the present invention to provide an expansion valve that prevents the actuation rod from tilting when the valve body is lifted and prevents erosion of the throttle portion without increasing manufacturing costs.
【０００５】[0005]
【課題を解決するための手段】本発明は、内部に、高圧
側流路と低圧側流路とを区画する区画壁が設けられ、且
つこの区画壁に前記高圧側流路および前記低圧側流路よ
り内径の小さい絞り部が形成された弁本体と、前記高圧
側流路内に移動可能に配され、前記絞り部の開度を制御
する弁体と、先端部が前記絞り部を貫通して前記弁体に
当接するとともに、軸方向に変位して前記弁体を作動さ
せる作動棒と、この作動棒の外周または前記区画壁の内
周に固定され、前記区画壁の内周または前記作動棒の外
周に摺動自在に配され、前記２つの冷媒流路を連通する
連通路が形成された耐侵食性の環状部材とを備えた技術
手段を採用した。According to the present invention, a partition wall for partitioning a high pressure side flow path and a low pressure side flow path is provided inside, and the high pressure side flow path and the low pressure side flow path are provided in the partition wall. A valve body formed with a throttle portion having an inner diameter smaller than that of the passage, a valve body movably arranged in the high-pressure side flow passage, for controlling the opening of the throttle portion, and a tip portion penetrating the throttle portion. Is fixed to the outer circumference of the actuating rod or the inner circumference of the partition wall and the inner circumference of the partition wall or the actuation. A technical means including a corrosion-resistant annular member which is slidably arranged on the outer circumference of the rod and in which a communication passage that communicates the two refrigerant flow passages is formed.
【０００６】[0006]
【作用】本発明は、作動棒の外周または区画壁の内周に
固定された環状部材が、区画壁の内周または作動棒の外
周に摺動自在に取り付けられているので、弁体が区画壁
よりリフトしても作動棒の先端部が傾くことはない。ま
た、耐侵食性の材料を用いていない弁本体の絞り部を、
耐侵食性の材料を用いた環状部材で覆っているので、冷
媒が高流速で絞り部内を通過することにより絞り部内で
気泡が破裂しても、製造コストを上昇させることなく絞
り部の侵食を防げる。According to the present invention, since the annular member fixed to the outer circumference of the actuation rod or the inner circumference of the partition wall is slidably attached to the inner circumference of the partition wall or the outer circumference of the actuation rod, the valve body is partitioned. Even if lifted from the wall, the tip of the operating rod does not tilt. In addition, the throttle part of the valve body that does not use erosion resistant material,
Since it is covered with an annular member made of an erosion resistant material, even if bubbles are ruptured in the throttle due to the refrigerant passing through the throttle at a high flow rate, the erosion of the throttle is prevented without increasing the manufacturing cost. Can be prevented.
【０００７】[0007]
【実施例】つぎに、本発明の膨張弁を図１ないし図４に
示す一実施例に基づいて説明する。図１および図２は冷
凍サイクルに組み込まれる温度作動式の膨張弁の主要部
を示した図で、図３はその膨張弁の全体構造を示した図
である。温度作動式の膨張弁１は、内部を冷媒が流れる
管状の弁本体２と、この弁本体２の上部に設けられたエ
レメント３と、このエレメント３にキャピラリチューブ
４を介して連結する感温筒５と、弁本体２内に移動可能
に配されたボール弁６と、このボール弁６を図示上方に
付勢するコイルスプリング７と、ボール弁６を往復方向
に作動させる作動棒８と、この作動棒８の先端部（図示
下端部）に取り付けられたガイド９とを備える。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an expansion valve of the present invention will be described based on an embodiment shown in FIGS. 1 and 2 are diagrams showing a main part of a temperature-operated expansion valve incorporated in a refrigeration cycle, and FIG. 3 is a diagram showing an entire structure of the expansion valve. The temperature-operated expansion valve 1 includes a tubular valve body 2 in which a refrigerant flows, an element 3 provided on an upper portion of the valve body 2, and a temperature-sensitive tube connected to the element 3 via a capillary tube 4. 5, a ball valve 6 movably arranged in the valve body 2, a coil spring 7 for urging the ball valve 6 upward in the drawing, and an operating rod 8 for operating the ball valve 6 in the reciprocating direction. A guide 9 attached to the tip (lower end in the figure) of the actuation rod 8 is provided.
【０００８】弁本体２は、真鍮製で断面形状がＴ字型の
形状に形成されている。この弁本体２には、内部を高圧
側流路１０と低圧側流路１１とに２分する区画壁１２が
冷媒の流れ方向に直交する方向に設けられている。この
区画壁１２には、高圧側流路１０と低圧側流路１１より
内径の小さいオリフィス１３がその区画壁１２の両側面
を連通するように形成されている。高圧側流路１０は、
冷凍サイクルのレシーバ（図示せず）の出口側に冷媒配
管（図示せず）を介して連通している。また、低圧側流
路１１は、冷凍サイクルの冷媒蒸発器（図示せず）の入
口側に冷媒配管（図示せず）を介して連通している。区
画壁１２の高圧側流路１０側の端面は、膨張弁１の閉弁
時にボール弁６がシートするシール部１４とされてい
る。オリフィス１３は、本発明の絞り部であって、円形
状に形成されており、内部を作動棒８が往復移動すると
ともに、内周面にガイド９が摺動自在に往復移動する。The valve body 2 is made of brass and has a T-shaped cross section. A partition wall 12 that divides the interior of the valve body 2 into a high-pressure side flow passage 10 and a low-pressure side flow passage 11 is provided in a direction orthogonal to the flow direction of the refrigerant. The partition wall 12 is formed with an orifice 13 having an inner diameter smaller than that of the high pressure side flow path 10 and the low pressure side flow path 11 so as to connect both side surfaces of the partition wall 12. The high pressure side flow passage 10 is
It communicates with the outlet side of a receiver (not shown) of the refrigeration cycle via a refrigerant pipe (not shown). Further, the low pressure side flow passage 11 communicates with an inlet side of a refrigerant evaporator (not shown) of the refrigeration cycle via a refrigerant pipe (not shown). The end surface of the partition wall 12 on the high pressure side flow path 10 side is a seal portion 14 on which the ball valve 6 seats when the expansion valve 1 is closed. The orifice 13 is a throttle portion of the present invention and is formed in a circular shape. The operating rod 8 reciprocates inside and the guide 9 slidably reciprocates on the inner peripheral surface.
【０００９】エレメント３は、内部を上側圧力室１５と
下側圧力室１６とに区画するダイヤフラム１７が変位自
在に配されている。上側圧力室１５は、キャピラリチュ
ーブ４を介して感温筒５の内部に連通している。また、
下側圧力室１６は、弁本体２に形成された連通孔１８を
介して低圧側流路１１に連通している。このため、下側
圧力室１６内には、オリフィス１３の出口側の圧力（冷
凍サイクルの低圧側圧力）が加わる。ダイヤフラム１７
の下側圧力室１６側の面には、中央部に作動棒８の後端
部（図示上端部）に連結する円盤状のストッパ１９が同
軸的に装着されている。The element 3 has a diaphragm 17 partitioning the inside thereof into an upper pressure chamber 15 and a lower pressure chamber 16 which are displaceable. The upper pressure chamber 15 communicates with the inside of the temperature sensing tube 5 via the capillary tube 4. Also,
The lower pressure chamber 16 communicates with the low pressure side flow passage 11 via a communication hole 18 formed in the valve body 2. Therefore, the pressure on the outlet side of the orifice 13 (pressure on the low pressure side of the refrigeration cycle) is applied to the lower pressure chamber 16. Diaphragm 17
On the surface of the lower pressure chamber 16 side, a disk-shaped stopper 19 that is connected to the rear end portion (upper end portion in the drawing) of the actuating rod 8 is coaxially mounted at the center portion.
【００１０】感温筒５は、内部に冷凍サイクルを循環す
る冷媒と同種の冷媒ガスが封入され、冷媒蒸発器の出口
側の冷媒配管（図示せず）に接触して取り付けられてお
り、その冷媒配管内を流れる冷媒の温度変化を圧力変化
に変換して、キャピラリチューブ４を介してエレメント
３の上側圧力室１５内に伝える。ボール弁６は、本発明
の弁体であって、高圧側流路１０内に変位自在に配さ
れ、上側に作動棒８の先端部が当接し、下側に弁座２０
が当接する。このボール弁６は、上側圧力室１５内に作
用する感温筒５内の圧力と下側圧力室１６内に作用する
低圧側圧力およびコイルスプリング７のばね力とがバラ
ンスする位置に変位し、このボール弁６のオリフィス１
３からのリフト量に応じて冷媒の流量が制御される。The temperature-sensitive cylinder 5 is filled with a refrigerant gas of the same kind as the refrigerant circulating in the refrigeration cycle, and is attached in contact with a refrigerant pipe (not shown) on the outlet side of the refrigerant evaporator. The temperature change of the refrigerant flowing in the refrigerant pipe is converted into a pressure change and transmitted to the upper pressure chamber 15 of the element 3 via the capillary tube 4. The ball valve 6 is a valve element of the present invention, is displaceably arranged in the high-pressure side flow passage 10, the tip end of the operating rod 8 abuts on the upper side, and the valve seat 20 on the lower side.
Abut. The ball valve 6 is displaced to a position where the pressure in the temperature sensitive cylinder 5 acting in the upper pressure chamber 15, the low pressure side pressure acting in the lower pressure chamber 16 and the spring force of the coil spring 7 are balanced, Orifice 1 of this ball valve 6
The flow rate of the refrigerant is controlled according to the lift amount from 3.
【００１１】コイルスプリング７は、上端が弁座２０に
保持され、下端が弁本体２の下端部に螺着された調節ね
じ２１に保持されている。このコイルスプリング７は、
ボール弁６、作動棒８、ストッパ１９を介してダイヤフ
ラム１７を図示上方に付勢している。調節ねじ２１は、
弁本体２の固定位置に応じてボール弁６の開弁圧を変更
する。作動棒８は、弁本体２の硬度より硬い材料（例え
ばＳＵＳ等）製の丸棒状に形成されており、ダイヤフラ
ム１７の変位をボール弁６に伝えるもので、先端部がオ
リフィス１３内を往復移動する。The coil spring 7 has an upper end held by the valve seat 20 and a lower end held by the adjusting screw 21 screwed to the lower end of the valve body 2. This coil spring 7
The diaphragm 17 is urged upward in the drawing via the ball valve 6, the operating rod 8 and the stopper 19. The adjusting screw 21 is
The valve opening pressure of the ball valve 6 is changed according to the fixed position of the valve body 2. The actuating rod 8 is formed in a round bar shape made of a material harder than the hardness of the valve body 2 (for example, SUS or the like), transmits the displacement of the diaphragm 17 to the ball valve 6, and the tip part reciprocates in the orifice 13. To do.
【００１２】ガイド９は、本発明の環状部材であって、
局部侵食に耐え、弁本体２の硬度より硬い材料（例えば
ＳＵＳ等）製でリング状に形成されており、作動棒８の
先端部に固定されている。このガイド９は、図４にも示
したように、オリフィス１３を構成する区画壁１２の内
周面を摺動することによって作動棒８を軸方向のみに誘
導する円筒部２２と、この円筒部２２の内周壁より中心
側に延ばされて作動棒８の先端部の外周に固定される３
本の取付片２３とから構成されている。ガイド９の作動
棒８の先端部への取付方法は、作動棒８を弁本体２内に
組み付ける前に、作動棒８の先端部の外周にガイド９の
取付片２３を螺着、溶着または接着等の手段により組み
付けてガイド９を作動棒８の先端部に固定する。なお、
円筒部２２および３本の取付片２３と作動棒８とに囲ま
れた３箇所の空間は、高圧側流路１０と低圧側流路１１
とを連通し、内部を冷媒が流れる円弧状の連通路２４と
されている。The guide 9 is the annular member of the present invention,
It is made of a material (for example, SUS or the like) that is resistant to local erosion and harder than the hardness of the valve body 2 and is formed in a ring shape, and is fixed to the distal end portion of the operating rod 8. As shown in FIG. 4, the guide 9 slides on the inner peripheral surface of the partition wall 12 forming the orifice 13 to guide the operating rod 8 only in the axial direction, and the cylindrical portion 22. It is extended to the center side from the inner peripheral wall of 22 and is fixed to the outer periphery of the tip end portion of the operating rod 8.
It is composed of a mounting piece 23 of a book. Before mounting the operating rod 8 in the valve body 2, the guide 9 is attached to the distal end of the operating rod 8 by screwing, welding or adhering the mounting piece 23 of the guide 9 to the outer periphery of the distal end of the operating rod 8. The guide 9 is fixed to the tip portion of the actuation rod 8 by assembling it by such means. In addition,
Three spaces surrounded by the cylindrical portion 22 and the three mounting pieces 23 and the actuating rod 8 have high-pressure side flow passages 10 and low-pressure side flow passages 11.
And an arc-shaped communication passage 24 through which the refrigerant flows.
【００１３】つぎに、本実施例の温度作動式の膨張弁１
の作用を図１ないし図４に基づいて簡単に説明する。冷
凍サイクルを起動させると、上側圧力室１５内に作用す
る感温筒５内の圧力が、下側圧力室１６内に作用する低
圧側圧力およびコイルスプリング７のばね力より上回る
ため、ダイヤフラム１７が図示下方に変位する。そし
て、ダイヤフラム１７が変位することによって、ストッ
パ１９および作動棒８も図示下方に変位する。このた
め、作動棒８の先端部が当接するボール弁６が区画壁１
２のシール部１４より図示下方にリフト〔膨張弁１が開
弁（図２参照）〕する。Next, the temperature-operated expansion valve 1 of this embodiment
The operation will be briefly described with reference to FIGS. When the refrigeration cycle is activated, the pressure in the temperature sensitive cylinder 5 acting in the upper pressure chamber 15 exceeds the low pressure side pressure acting in the lower pressure chamber 16 and the spring force of the coil spring 7. It is displaced downward in the figure. When the diaphragm 17 is displaced, the stopper 19 and the operating rod 8 are also displaced downward in the figure. Therefore, the ball valve 6 with which the tip portion of the operating rod 8 abuts is separated from the partition wall 1.
The second seal portion 14 is lifted downward in the figure (the expansion valve 1 is opened (see FIG. 2)).
【００１４】一方、レシーバより流出する液冷媒が冷媒
配管を通り膨張弁１の高圧側流路１０内に流入する。こ
の高圧側流路１０内に流入した液冷媒は、調節ねじ２１
の内部を通り、オリフィス１３とボール弁６との位置関
係により冷媒の流量が制御される。そして、液冷媒は、
オリフィス１３とボール弁６との間で急激に断熱膨張し
て気泡が発生し、気液二相冷媒となる。この気液二相冷
媒は、作動棒８の先端部に固定されたガイド９の連通路
２４を通って低圧側流路１１を通り、冷媒配管を通って
冷媒蒸発器内に流入する。On the other hand, the liquid refrigerant flowing out from the receiver flows through the refrigerant pipe into the high pressure side flow passage 10 of the expansion valve 1. The liquid refrigerant that has flowed into the high-pressure side channel 10 is adjusted by the adjusting screw 21.
And the flow rate of the refrigerant is controlled by the positional relationship between the orifice 13 and the ball valve 6. And the liquid refrigerant is
A sudden adiabatic expansion occurs between the orifice 13 and the ball valve 6 to generate bubbles, which serve as a gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant passes through the communication passage 24 of the guide 9 fixed to the tip end of the actuation rod 8, the low-pressure side flow passage 11, the refrigerant pipe, and flows into the refrigerant evaporator.
【００１５】ここで、図２に示したように、ボール弁６
のリフト量が最大となり冷媒の流量が最大流量となる
と、オリフィス１３内に位置するガイド９の連通路２４
を通過する冷媒の流速も最大となる。このとき、局部侵
食に耐え、弁本体２の硬度より硬い材料（例えばＳＵ
Ｓ）製のガイド９によって、真鍮製の弁本体２に形成さ
れたオリフィス１３の表面（区画壁１２の内周縁）を覆
っているので、オリフィス１３内の連通路２４を通過す
る際に気泡が破裂してもオリフィス１３の表面（区画壁
１２の内周縁）が侵食されることはない。また、弁本体
２に局部侵食に耐えうる材料（例えばＳＵＳ）を用いて
いないので、膨張弁１の製造コストの上昇を抑えられ
る。Here, as shown in FIG. 2, the ball valve 6
When the lift amount of the refrigerant reaches the maximum and the flow rate of the refrigerant reaches the maximum flow rate, the communication passage 24 of the guide 9 located in the orifice 13
The flow velocity of the refrigerant passing through is also maximum. At this time, a material that withstands local erosion and is harder than the hardness of the valve body 2 (for example, SU
Since the surface of the orifice 13 formed in the brass valve body 2 (inner peripheral edge of the partition wall 12) is covered by the guide 9 made of S), air bubbles are generated when passing through the communication passage 24 in the orifice 13. Even if it ruptures, the surface of the orifice 13 (the inner peripheral edge of the partition wall 12) is not eroded. Further, since the valve body 2 is not made of a material that can withstand local erosion (for example, SUS), an increase in the manufacturing cost of the expansion valve 1 can be suppressed.
【００１６】この結果、冷凍サイクルの停止時、すなわ
ち、ボール弁６が区画壁１２のシール部１４に当接〔膨
張弁１が閉弁（図１参照）〕した時でも、高圧側流路１
０と低圧側流路１１とが連通することはなく、高圧側流
路１０から低圧側流路１１へ冷媒が流出するという不具
合を防止できる。また、ボール弁６の最大リフト時にガ
イド９が区画壁１２の内周に摺動しながら図示下方に移
動するので、作動棒８が常に軸方向に移動し、作動棒８
が傾くことはない。この結果、ボール弁６とオリフィス
１３との間の距離が安定するため、ボール弁６のリフト
量に応じて冷媒の流量が決まることによって、冷凍サイ
クルの性能の低下を防止することができる。As a result, even when the refrigeration cycle is stopped, that is, when the ball valve 6 comes into contact with the seal portion 14 of the partition wall 12 (the expansion valve 1 is closed (see FIG. 1)), the high pressure side passage 1
0 and the low-pressure side flow passage 11 do not communicate with each other, and it is possible to prevent the problem that the refrigerant flows out from the high-pressure side flow passage 10 to the low-pressure side flow passage 11. Further, when the ball valve 6 is maximally lifted, the guide 9 moves downward in the drawing while sliding on the inner circumference of the partition wall 12, so that the actuation rod 8 always moves in the axial direction and the actuation rod 8 is moved.
Does not tilt. As a result, the distance between the ball valve 6 and the orifice 13 becomes stable, so that the refrigerant flow rate is determined according to the lift amount of the ball valve 6, so that the performance of the refrigeration cycle can be prevented from being degraded.
【００１７】〔変形例〕本実施例では、作動棒８とガイ
ド（環状部材）９とを別途設けたが、作動棒と環状部材
とを一体的に設けても良い。また、環状部材を区画壁の
内周に固定して、作動棒を環状部材の内周で摺動させて
も良い。本実施例では、オリフィス１３を円形状に形成
し、ガイド９をリング状に形成したが、各々の摺動面に
スプライン等のように凹凸を設けても良い。本実施例で
は、弁体としてボール弁６を採用したが、円錐弁等のそ
の他の形状の弁体を用いても良い。本実施例では、円弧
状の連通路２４を３箇所形成したが、連通路の形状や個
数は自由に設計変更できる。[Modification] In this embodiment, the operating rod 8 and the guide (annular member) 9 are separately provided, but the operating rod and the annular member may be integrally provided. Further, the annular member may be fixed to the inner circumference of the partition wall and the actuation rod may be slid on the inner circumference of the annular member. In the present embodiment, the orifice 13 is formed in a circular shape and the guide 9 is formed in a ring shape, but each sliding surface may be provided with irregularities such as splines. In the present embodiment, the ball valve 6 is used as the valve element, but a valve element having another shape such as a conical valve may be used. In this embodiment, three arc-shaped communication passages 24 are formed, but the shape and number of the communication passages can be freely changed in design.
【００１８】[0018]
【発明の効果】本発明は、弁体が区画壁よりリフトした
時に作動棒が傾くことを防止することができ、且つ膨張
弁の製造コストを上昇させることなく冷媒の高流速時の
絞り部の侵食を防止することができる。The present invention can prevent the actuating rod from tilting when the valve body is lifted from the partition wall, and can increase the production cost of the expansion valve without increasing the manufacturing cost of the refrigerant. Erosion can be prevented.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例に適用された膨張弁の主要部
を示した断面図である。FIG. 1 is a cross-sectional view showing a main part of an expansion valve applied to an embodiment of the present invention.
【図２】本発明の一実施例に適用された膨張弁の主要部
を示した断面図である。FIG. 2 is a sectional view showing a main part of an expansion valve applied to an embodiment of the present invention.
【図３】本発明の一実施例に適用された膨張弁の全体構
造を示した断面図である。FIG. 3 is a cross-sectional view showing the entire structure of an expansion valve applied to one embodiment of the present invention.
【図４】本発明の一実施例に適用されたガイドを示した
斜視図である。FIG. 4 is a perspective view showing a guide applied to an embodiment of the present invention.
【図５】従来の膨張弁の主要部を示した断面図である。FIG. 5 is a sectional view showing a main part of a conventional expansion valve.
【図６】従来の膨張弁の主要部を示した断面図である。FIG. 6 is a sectional view showing a main part of a conventional expansion valve.
【図７】従来の膨張弁のリフト量と冷凍サイクルの低圧
側圧力との関係を示したグラフである。FIG. 7 is a graph showing a relationship between a lift amount of a conventional expansion valve and a low pressure side pressure of a refrigeration cycle.
１ 膨張弁 ２ 弁本体 ６ ボール弁（弁体） ８ 作動棒 ９ ガイド（環状部材） １０ 高圧側流路（高圧側の冷媒流路） １１ 低圧側流路（低圧側の冷媒流路） １２ 区画壁 １３ オリフィス（絞り部） ２４ 連通路 DESCRIPTION OF SYMBOLS 1 expansion valve 2 valve body 6 ball valve (valve body) 8 actuating rod 9 guide (annular member) 10 high-pressure side passage (high-pressure side refrigerant passage) 11 low-pressure side passage (low-pressure side refrigerant passage) 12 sections Wall 13 Orifice (throttle) 24 Communication passage
Claims (1)
とを区画する区画壁が設けられ、 且つこの区画壁に前記高圧側流路および前記低圧側流路
より内径の小さい絞り部が形成された弁本体と、 （ｂ）前記高圧側流路内に移動可能に配され、前記絞り
部の開度を制御する弁体と、 （ｃ）先端部が前記絞り部を貫通して前記弁体に当接す
るとともに、軸方向に変位して前記弁体を作動させる作
動棒と、 （ｄ）この作動棒の外周または前記区画壁の内周に固定
され、前記区画壁の内周または前記作動棒の外周に摺動
自在に配され、前記２つの冷媒流路を連通する連通路が
形成された耐侵食性の環状部材とを備えた膨張弁。1. A partition wall for partitioning a high-pressure side flow path and a low-pressure side flow path is provided inside, and the partition wall has an inner diameter smaller than that of the high-pressure side flow path and the low-pressure side flow path. A valve body in which a throttle portion is formed; (b) a valve body that is movably arranged in the high-pressure side flow passage and controls the opening of the throttle portion; and (c) a tip portion penetrates the throttle portion. An actuating rod that is brought into contact with the valve body and is displaced in the axial direction to actuate the valve body; and (d) is fixed to the outer circumference of the operating rod or the inner circumference of the partition wall, An expansion valve, which is provided slidably around the circumference or the outer circumference of the actuation rod, and has an erosion-resistant annular member in which a communication passage that connects the two refrigerant passages is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4123409A JPH05346276A (en) | 1992-05-15 | 1992-05-15 | Expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4123409A JPH05346276A (en) | 1992-05-15 | 1992-05-15 | Expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05346276A true JPH05346276A (en) | 1993-12-27 |
Family
ID=14859846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4123409A Pending JPH05346276A (en) | 1992-05-15 | 1992-05-15 | Expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05346276A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004293779A (en) * | 2003-03-12 | 2004-10-21 | Fuji Koki Corp | Expansion valve |
| JP2008202800A (en) * | 2001-07-12 | 2008-09-04 | Fuji Koki Corp | Expansion valve vibration absorbing member |
| KR100876046B1 (en) * | 2001-07-12 | 2008-12-26 | 가부시기가이샤 후지고오키 | Expansion valve and dustproof member for expansion valve |
| WO2022030309A1 (en) * | 2020-08-03 | 2022-02-10 | イーグル工業株式会社 | Valve |
-
1992
- 1992-05-15 JP JP4123409A patent/JPH05346276A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008202800A (en) * | 2001-07-12 | 2008-09-04 | Fuji Koki Corp | Expansion valve vibration absorbing member |
| KR100876046B1 (en) * | 2001-07-12 | 2008-12-26 | 가부시기가이샤 후지고오키 | Expansion valve and dustproof member for expansion valve |
| JP2004293779A (en) * | 2003-03-12 | 2004-10-21 | Fuji Koki Corp | Expansion valve |
| WO2022030309A1 (en) * | 2020-08-03 | 2022-02-10 | イーグル工業株式会社 | Valve |
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