JP2012052693A - Solenoid valve-integrated expansion valve - Google Patents

Solenoid valve-integrated expansion valve Download PDF

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JP2012052693A
JP2012052693A JP2010193545A JP2010193545A JP2012052693A JP 2012052693 A JP2012052693 A JP 2012052693A JP 2010193545 A JP2010193545 A JP 2010193545A JP 2010193545 A JP2010193545 A JP 2010193545A JP 2012052693 A JP2012052693 A JP 2012052693A
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valve
valve body
chamber
refrigerant
solenoid valve
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JP5619531B2 (en
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Makoto Sudo
真 須藤
Akinori Nanbu
晶紀 南部
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Fujikoki Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a solenoid valve-integrated expansion valve avoiding occurrence of malfunction by relieving impact pressure acting on a valve element by opening of a solenoid valve.SOLUTION: In this solenoid valve-integrated expansion valve, a high-pressure liquid refrigerant supplied from the compressor of a refrigerating cycle is delivered to an evaporator after the high-pressure liquid refrigerant is depressurized and the flow rate of the high-pressure liquid refrigerant is controlled. The solenoid valve-integrated expansion valve includes: a valve body 10 having a valve chamber 150, an orifice 134 communicating with the valve chamber, an inlet passage 102 introducing the high-pressure refrigerant into the valve chamber, and an outlet passage 140 introducing the refrigerant depressurized by the orifice to the outside; the valve element 120 slidably stored in the valve chamber and also opening/closing the orifice; a power element 20 driving the valve element; and the solenoid valve 30 opening/closing the inlet passage. A pressure equalizing passage Gis provided for allowing two spaces Pr, Prpositioned at both the ends of the valve element in a sliding direction in the valve chamber to communicate with each other.

Description

本発明は、冷凍・冷蔵ユニット等の冷凍システムに適用される電磁弁一体型膨張弁に関する。   The present invention relates to a solenoid valve-integrated expansion valve applied to a refrigeration system such as a refrigeration / refrigeration unit.

冷凍・冷蔵庫内の温度制御において、設定温度に達した場合には圧縮機を停止させ、設定温度より高くなった場合には再度圧縮機を運転する必要がある。圧縮機停止時に圧縮機手前に液冷媒が溜まり、圧縮機の再起動時に圧縮機が液冷媒の吸入により破損するのを防ぐため、膨張弁の手前に電磁弁が設けられる。また、複数の蒸発器への冷媒供給をそれぞれ制御する目的で膨張弁の手前に電磁弁が設けられることもある。そして、部品点数や設置スペースを削減することを目的として、電磁弁一体型膨張弁が提案されている。   In the temperature control in the freezer / refrigerator, it is necessary to stop the compressor when the set temperature is reached, and to operate the compressor again when the temperature becomes higher than the set temperature. An electromagnetic valve is provided in front of the expansion valve in order to prevent liquid refrigerant from accumulating before the compressor when the compressor is stopped and the compressor from being damaged by suction of the liquid refrigerant when the compressor is restarted. In addition, an electromagnetic valve may be provided in front of the expansion valve for the purpose of controlling the refrigerant supply to the plurality of evaporators. An electromagnetic valve-integrated expansion valve has been proposed for the purpose of reducing the number of parts and installation space.

この種の電磁弁一体型膨張弁は、弁本体、弁体、パワーエレメント及び電磁弁等で構成される。弁本体は、弁室、弁室に連通するオリフィス、弁室内に高圧冷媒を導入する入口通路、オリフィスで減圧した冷媒を外部に導出する出口通路等を有している。弁体は弁室内に摺動自在に収容され、パワーエレメントにより駆動されてオリフィスを開閉する。電磁弁は、凝縮器から供給される高圧の液冷媒を弁室に導入する入口通路を開閉するものであり、非通電時には当該入口通路を閉じており、通電時には当該入口通路を開くように構成されている。   This type of solenoid valve-integrated expansion valve includes a valve body, a valve body, a power element, a solenoid valve, and the like. The valve body has a valve chamber, an orifice communicating with the valve chamber, an inlet passage for introducing high-pressure refrigerant into the valve chamber, an outlet passage for leading the refrigerant decompressed by the orifice to the outside, and the like. The valve body is slidably accommodated in the valve chamber and is driven by the power element to open and close the orifice. The solenoid valve opens and closes an inlet passage for introducing high-pressure liquid refrigerant supplied from a condenser into the valve chamber, and is configured to close the inlet passage when not energized and open the inlet passage when energized. Has been.

このような電磁弁一体型膨張弁においては、電磁弁が開いたときに、高圧の液冷媒が弁室における弁体の一端側の空間に急激に流入することにより、弁体に衝撃的な圧力が与えられ、弁体が通常のストローク以上に移動して、弁体を支持するスプリング等の内蔵部品が破損する等の不具合が発生することがあった。   In such a solenoid valve-integrated expansion valve, when the solenoid valve is opened, high-pressure liquid refrigerant suddenly flows into the space on one end side of the valve body in the valve chamber, so that a shock pressure is applied to the valve body. In some cases, the valve body moves beyond the normal stroke and a built-in component such as a spring supporting the valve body is damaged.

特開平７−１５１２５９号公報JP 7-151259 A

本発明の目的は、電磁弁の開弁により弁体に加わる衝撃的圧力を緩和して不具合の発生を回避することができる電磁弁一体型膨張弁を提供するものである。   An object of the present invention is to provide a solenoid valve-integrated expansion valve that can relieve shock pressure applied to a valve body by opening a solenoid valve and avoid occurrence of a malfunction.

上記目的を達成するために、本発明は、冷凍サイクルの圧縮機側から供給される高圧の液冷媒を減圧するとともに流量を制御して蒸発器側へ送り出すものであって、弁室、該弁室に連通するオリフィス、前記弁室内に高圧冷媒を導入する入口通路、前記オリフィスで減圧した冷媒を外部に導出する出口通路を有する弁本体と、前記弁室内に摺動自在に収容されるとともに前記オリフィスを開閉する弁体と、該弁体を駆動するパワーエレメントと、前記入口通路を開閉する電磁弁とを備えた電磁弁一体型膨張弁において、前記弁室内における前記弁体の摺動方向両端に位置する二つの空間を相互に連通する均圧通路を設けたことを特徴とするものである。   In order to achieve the above object, the present invention reduces the pressure of high-pressure liquid refrigerant supplied from the compressor side of the refrigeration cycle and controls the flow rate to send it to the evaporator side. A valve body having an orifice communicating with the chamber, an inlet passage for introducing high-pressure refrigerant into the valve chamber, an outlet passage for leading the refrigerant decompressed by the orifice to the outside, and slidably accommodated in the valve chamber and the An expansion valve integrated with a solenoid valve, comprising: a valve element that opens and closes an orifice; a power element that drives the valve element; and an electromagnetic valve that opens and closes the inlet passage. The pressure equalizing passage which connects two spaces located in each other is provided.

本発明の電磁弁一体型膨張弁は、上述した構成を備えるので、電磁弁が開弁する際に、弁室内における弁体の一端側の空間に流入する冷媒を均圧通路を介して弁体の他端側の空間に逃がすことができる。これによって、弁体に与えられる衝撃圧が緩和されるので、弁体を支持するバネ等の内蔵部品が故障する等の不具合を回避することができる。   Since the solenoid valve-integrated expansion valve of the present invention has the above-described configuration, when the solenoid valve is opened, the refrigerant flowing into the space on one end side of the valve body in the valve chamber passes through the pressure equalizing passage. It can escape to the space of the other end side. As a result, the impact pressure applied to the valve body is relieved, so that problems such as failure of built-in parts such as a spring supporting the valve body can be avoided.

本発明の一実施形態である電磁弁一体型膨張弁の断面図。Sectional drawing of the solenoid valve integrated expansion valve which is one Embodiment of this invention. 図１の電磁弁一体型膨張弁が組み込まれる冷凍サイクルの説明図。Explanatory drawing of the refrigerating cycle in which the solenoid valve integrated expansion valve of FIG. 1 is integrated. 図１の電磁弁一体型膨張弁の斜視図。The perspective view of the solenoid valve integrated expansion valve of FIG. 図１の電磁弁一体型膨張弁の正面図。The front view of the solenoid valve integrated expansion valve of FIG. 図１の電磁弁一体型膨張弁の背面図。The rear view of the solenoid valve integrated expansion valve of FIG. 図１の電磁弁一体型膨張弁の右側面図。The right view of the solenoid valve integrated expansion valve of FIG. 図１の電磁弁一体型膨張弁の平面図。The top view of the solenoid valve integrated expansion valve of FIG.

以下、添付した図面に基づいて、本発明による電磁弁一体型膨張弁の実施例を説明する。
図２は本発明の電磁弁一体型膨張弁が組み込まれる冷凍サイクルの概要を示す説明図である。 Hereinafter, embodiments of an expansion valve integrated with a solenoid valve according to the present invention will be described with reference to the accompanying drawings.
FIG. 2 is an explanatory diagram showing an outline of a refrigeration cycle in which the expansion valve integrated with a solenoid valve of the present invention is incorporated.

圧縮機Ｃで加圧された冷媒は、ラインＬ１を通って凝縮器Ｄに送られ、液化される。液冷媒はラインＬ２を介して電磁弁一体型膨張弁１に送られ、電磁弁３０が開くと、弁本体１０の弁室へ送られる。弁本体１０で減圧されて流量が制御された冷媒は、ラインＬ３を通って蒸発器Ｅへ送られ、冷風等を発生させる。蒸発器Ｅを出た冷媒は、ラインＬ４を介して圧縮機Ｃに戻る。本発明の電磁弁一体型膨張弁１にあっては、蒸発器Ｅの出口側に設けた感温筒Ｓにより蒸発器Ｅの出口の冷媒の温度を感知して、その温度情報をラインＬ６を介して電磁弁一体型膨張弁１へ送るとともに、ラインＬ４の冷媒の圧力を外均管となるラインＬ５を介して電磁弁一体型膨張弁１へ送る構造を備える。 The refrigerant pressurized by the compressor C is fed to a condenser D through line L 1, liquefied. The liquid refrigerant is sent to the solenoid valves integrated expansion valve 1 via the line L 2, the electromagnetic valve 30 is opened, is sent to the valve chamber of the valve body 10. The refrigerant decompressed by the flow rate is controlled by the valve body 10 is sent to the evaporator E through line L 3, to generate cool air and the like. Refrigerant discharged from the evaporator E is returned to the compressor C via the line L 4. In the solenoid valve-integrated expansion valve 1 of the present invention, the temperature of the refrigerant at the outlet of the evaporator E is sensed by the temperature sensing cylinder S provided on the outlet side of the evaporator E, and the temperature information is displayed on the line L 6. And the pressure of the refrigerant in the line L 4 is sent to the solenoid valve-integrated expansion valve 1 via the line L 5 serving as an outer equalizing pipe.

図１は本発明の一実施形態である電磁弁一体型膨張弁の断面図、図３は斜視図、図４は正面図、図５は背面図、図６は右側面図、図７は平面図である。   1 is a sectional view of an expansion valve integrated with a solenoid valve according to an embodiment of the present invention, FIG. 3 is a perspective view, FIG. 4 is a front view, FIG. 5 is a rear view, FIG. 6 is a right side view, and FIG. FIG.

この電磁弁一体型膨張弁は、弁本体１０を備え、弁本体１０の上部に弁本体１０内に装備される弁体１２０の駆動機構であるパワーエレメント２０を備える。そして、弁本体１０の側面には電磁弁３０が装備される。弁本体１０には、凝縮器Ｄ側からラインＬ２を介して送られてくる高圧の冷媒が導入されるパイプＰ１と、弁本体１０内で減圧されるとともに流量が制御された冷媒を蒸発器Ｅ側へ送り出すパイプＰ２が連結される。また、弁本体１０には、外均管として機能するパイプＰ３が設けられ、このパイプＰ３には、蒸発器Ｅを出て圧縮機Ｃ側へ戻る冷媒がラインＬ５を介して導入される。さらに、パワーエレメント２０の頂部には、パイプＰ４が接続されており、このパイプＰ４には、蒸発器Ｅを出て圧縮機Ｃ側へ戻る冷媒の温度を伝達する感温ガスがラインＬ６を介して導入される。 This solenoid valve-integrated expansion valve includes a valve body 10 and a power element 20 that is a drive mechanism of a valve body 120 provided in the valve body 10 at the upper part of the valve body 10. An electromagnetic valve 30 is provided on the side surface of the valve body 10. The valve body 10, a pipe P 1 which high-pressure refrigerant sent via the line L 2 from the condenser D side is introduced, the refrigerant whose flow rate is controlled with the reduced pressure within the valve body 10 evaporates pipe P 2 for feeding to the vessel E side is connected. Further, the valve body 10 is provided with a pipe P 3 that functions as SotoHitoshikan, this pipe P 3, the refrigerant returning exits the evaporator E to the compressor C side is introduced via a line L 5 The Further, a pipe P 4 is connected to the top of the power element 20, and a temperature sensitive gas that transmits the temperature of the refrigerant that leaves the evaporator E and returns to the compressor C side is connected to the pipe P 4. 6 is introduced.

図１に示すように、弁本体１０は、その下端部から上方に向けて段付穴状に形成された弁室１５０とその上端に連通するオリフィス１３４とを有する。弁室１５０の上部は弁体収容室１５０ａとなっており、その片側には、紙面に直交する方向に入口通路１０２が形成され、その一端はパイプＰ１に連通し、他端は電磁弁３０の弁室に連通している。また、オリフィス１３４の上方には出口通路１４０が水平に形成され、その一端はオリフィス１３４に連通し、他端はパイプＰ２に連通している。さらに出口通路１４０の上方には上方に向けて挿入孔１４が形成され、その下端は出口通路１４０に連通し、上端はパワーエレメント２０の下部圧力室２２２（後述）に連通している。 As shown in FIG. 1, the valve body 10 includes a valve chamber 150 formed in a stepped hole shape from the lower end portion thereof upward and an orifice 134 communicating with the upper end thereof. The upper portion of the valve chamber 150 has a valve chamber 150a, the one side, the inlet passage 102 is formed in a direction perpendicular to the paper surface, one end of which communicates with the pipe P 1, the other end solenoid valve 30 It communicates with the valve chamber. Further, above the orifice 134 outlet passage 140 is formed horizontally, one end communicates with the orifice 134, the other end is communicated with the pipe P 2. Further, the insertion hole 14 is formed upward above the outlet passage 140, its lower end communicates with the outlet passage 140, and its upper end communicates with a lower pressure chamber 222 (described later) of the power element 20.

弁体収容室１５０ａには弁体１２０が上下に摺動自在に挿入されている。弁体１２０の上端は円錐状に形成され、そのテーパ面１２２がオリフィス１３４の下端に形成された弁座１３２に接離することによりオリフィス１３４を開閉する。弁体１２０の下端はサポート１５２により支持され、このサポート１５２はスプリング１５４により上方に付勢されている。このスプリング１５４の下端部は有底筒状の調整ナット部材１５６により支持されている。   The valve body 120 is slidably inserted in the valve body storage chamber 150a up and down. The upper end of the valve body 120 is formed in a conical shape, and the orifice 134 is opened and closed by the tapered surface 122 coming into contact with and separating from the valve seat 132 formed at the lower end of the orifice 134. The lower end of the valve body 120 is supported by a support 152, and the support 152 is biased upward by a spring 154. The lower end of the spring 154 is supported by a bottomed cylindrical adjustment nut member 156.

調整ナット部材１５６はネジ部１５６ｂを介して弁本体１０に螺着されており、その下端に形成されたスリット１５６ａにドライバ等の工具を挿入して回転させることによりスプリング１５４の圧縮量を変更して弁体１２０への付勢力を調節する。なお、調整ナット部材１５６の上端外周部には、弁室１５０内の冷媒が外部へ漏れるのを防止するためのシール部材１５６ｃが嵌着されている。調整ナット部材１５６の下方には有底筒状のキャップ１５８が設けられており、このキャップ１５８はネジ部１５８ａを介して弁本体１０に螺着されている。   The adjustment nut member 156 is screwed to the valve body 10 via a screw portion 156b, and a compression amount of the spring 154 is changed by inserting and rotating a tool such as a screwdriver in a slit 156a formed at the lower end thereof. The biasing force to the valve body 120 is adjusted. A sealing member 156c for preventing the refrigerant in the valve chamber 150 from leaking to the outside is fitted on the outer periphery of the upper end of the adjustment nut member 156. A bottomed cylindrical cap 158 is provided below the adjustment nut member 156, and the cap 158 is screwed to the valve body 10 via a screw portion 158a.

挿入孔１４にはステンレス等で形成される作動棒１６０が摺動自在に挿入されている。作動棒１６０の下端は弁体１２０に当接し、上端はパワーエレメント２０のストッパ２３０（後述）に当接している。パワーエレメント２０は、上蓋２００と、下蓋２０２と、それらの間に挟み込まれるダイアフラム２１０とを有する。ダイアフラム２１０と上蓋２００の間に形成される上部圧力室２２０内には、感温筒ＳからパイプＰ４を介して送られてくる感温ガスが充填される。ダイアフラム２１０と下蓋２０２の間には下部圧力室２２２が形成され、この下部圧力室２２２には、弁本体１０に設けた外均通路１２を介して、蒸発器Ｅを出た冷媒の圧力が伝達される。ダイアフラム２１０の下面が上下に移動自在のストッパ部材２３０を押圧することで、ストッパ部材２３０が作動棒１６０を介して弁体１２０を駆動する構成となっている。   An operating rod 160 made of stainless steel or the like is slidably inserted into the insertion hole 14. The lower end of the operating rod 160 is in contact with the valve body 120, and the upper end is in contact with a stopper 230 (described later) of the power element 20. The power element 20 includes an upper lid 200, a lower lid 202, and a diaphragm 210 sandwiched therebetween. The upper pressure chamber 220 formed between the diaphragm 210 and the upper lid 200 is filled with the temperature sensitive gas sent from the temperature sensitive cylinder S through the pipe P4. A lower pressure chamber 222 is formed between the diaphragm 210 and the lower lid 202, and the pressure of the refrigerant exiting the evaporator E is passed through the outer pressure passage 12 provided in the valve body 10 in the lower pressure chamber 222. Communicated. When the lower surface of the diaphragm 210 presses the stopper member 230 that can move up and down, the stopper member 230 drives the valve body 120 via the operating rod 160.

電磁弁３０は、凝縮器Ｄから供給される高圧の液冷媒を弁室１５０に導入する入口通路１０２を開閉するものであり、非通電時には入口通路１０２と弁室１５０との間を遮断し、通電時には入口通路１０２と弁室１５０とを連通させるように構成されている。   The electromagnetic valve 30 opens and closes the inlet passage 102 through which the high-pressure liquid refrigerant supplied from the condenser D is introduced into the valve chamber 150, and shuts off the inlet passage 102 and the valve chamber 150 when not energized. When energized, the inlet passage 102 and the valve chamber 150 are configured to communicate with each other.

弁体１２０は、図１のＡ―Ａ断面図で示すように、断面六角形の棒材で形成されている。弁体１２０の角部１２４が摺接する弁体収容室１５０ａは円柱状の空間で、弁体１２０の外周面と弁体収容室１５０ａの内周面との間には、弁体の１２０の軸方向に延びる６本の均圧通路Ｇ１が形成されている。これらの均圧通路Ｇ１によって、弁体１２０の上端側の空間Ｐｒ１と下端側の空間Ｐｒ２とが相互に連通している。弁体１２０を断面多角形の棒材で構成することで、汎用の棒材を用いて弁体１２０を製作することができるため、製造コストが安価となる。 The valve body 120 is formed of a rod having a hexagonal cross section, as shown in the AA cross section of FIG. The valve body storage chamber 150a in which the corner portion 124 of the valve body 120 is in sliding contact is a cylindrical space, and the shaft of the valve body 120 is provided between the outer peripheral surface of the valve body 120 and the inner peripheral surface of the valve body storage chamber 150a. pressure equalizing path G 1 six extending direction is formed. By these pressure equalization passages G 1 , the space Pr 1 on the upper end side of the valve body 120 and the space Pr 2 on the lower end side communicate with each other. By configuring the valve body 120 with a bar having a polygonal cross section, the valve body 120 can be manufactured using a general-purpose bar, and thus the manufacturing cost is low.

本発明によれば、電磁弁３０が開弁するときに弁室１５０の上端側の空間Ｐｒ１に急激に流れ込む高圧の液冷媒は、均圧通路Ｇ１を介して弁室１５０の下端側の空間Ｐｒ２に流入するため、弁体１２０に与えられる衝撃圧が緩和される。これによって、弁体１２０が通常のストローク以上に移動して、スプリング１５４等の内蔵部品が破損する等の不具合を回避することができる。 According to the present invention, high-pressure liquid refrigerant flowing rapidly into the space Pr 1 of the upper end of the valve chamber 150 when the electromagnetic valve 30 is opened, the valve chamber 150 via the pressure equalizing path G 1 the lower end of the for flowing into the space Pr 2, impact pressure applied to the valve body 120 is relaxed. As a result, it is possible to avoid problems such as the valve body 120 moving beyond the normal stroke and the built-in components such as the spring 154 being damaged.

なお、上述した実施例にあっては、弁体の断面形状を六角形状に形成した例を示したが、四角形状や八角形状の他の多角形状とすることもできる。
また、多角形状にかえて、弁体の外周面に逃げ溝等を形成することも当然に可能である。
その他にも、本発明の要旨を逸脱しない範囲で上述した実施例に種々の改変を施すことができる。 In the above-described embodiment, an example in which the cross-sectional shape of the valve body is formed in a hexagonal shape has been shown, but other rectangular shapes such as a quadrangular shape and an octagonal shape may be used.
It is also possible to form relief grooves or the like on the outer peripheral surface of the valve body instead of the polygonal shape.
In addition, various modifications can be made to the above-described embodiments without departing from the gist of the present invention.

１０ 弁本体
２０ パワーエレメント
３０ 電磁弁
１０２ 入口通路
１２０ 弁体
１３４ オリフィス
１４０ 出口通路
１５０ 弁室
Ｇ１ 均圧通路 DESCRIPTION OF SYMBOLS 10 Valve body 20 Power element 30 Solenoid valve 102 Inlet passage 120 Valve body 134 Orifice 140 Outlet passage 150 Valve chamber G 1 Pressure equalizing passage

Claims (2)

冷凍サイクルの圧縮機側から供給される高圧の液冷媒を減圧するとともに流量を制御して蒸発器側へ送り出すものであって、弁室、該弁室に連通するオリフィス、前記弁室内に高圧冷媒を導入する入口通路、前記オリフィスで減圧した冷媒を外部に導出する出口通路を有する弁本体と、前記弁室内に摺動自在に収容されるとともに前記オリフィスを開閉する弁体と、該弁体を駆動するパワーエレメントと、前記入口通路を開閉する電磁弁とを備えた電磁弁一体型膨張弁において、前記弁室内における前記弁体の摺動方向両端に位置する二つの空間を相互に連通する均圧通路を設けたことを特徴とする電磁弁一体型膨張弁。   High pressure liquid refrigerant supplied from the compressor side of the refrigeration cycle is decompressed, and the flow rate is controlled and sent to the evaporator side. The valve chamber, an orifice communicating with the valve chamber, and the high pressure refrigerant in the valve chamber A valve body having an inlet passage for introducing the refrigerant, an outlet passage for leading the refrigerant decompressed by the orifice to the outside, a valve body slidably received in the valve chamber and opening and closing the orifice, and the valve body A solenoid valve-integrated expansion valve having a driving power element and an electromagnetic valve that opens and closes the inlet passage, and two spaces located at both ends in the sliding direction of the valve body in the valve chamber communicate with each other. A solenoid valve-integrated expansion valve, characterized in that a pressure passage is provided. 前記弁体が断面多角形状の棒材からなり、前記弁室における前記弁体が摺接する部位が円柱状の空間であり、前記弁体の外周面と前記円柱状の空間の内周面との間に前記均圧通路が形成されることを特徴とする請求項１記載の電磁弁一体型膨張弁。   The valve body is made of a rod having a polygonal cross section, and the portion of the valve chamber where the valve body slides is a cylindrical space, and the outer peripheral surface of the valve body and the inner peripheral surface of the cylindrical space The solenoid valve-integrated expansion valve according to claim 1, wherein the pressure equalizing passage is formed therebetween.
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WO2020189092A1 (en) * 2019-03-15 2020-09-24 株式会社不二工機 Expansion valve
CN113574303A (en) * 2019-03-15 2021-10-29 株式会社不二工机 Expansion valve
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