JPH0794873B2 - 2-stage operation solenoid valve - Google Patents
2-stage operation solenoid valveInfo
- Publication number
- JPH0794873B2 JPH0794873B2 JP62127023A JP12702387A JPH0794873B2 JP H0794873 B2 JPH0794873 B2 JP H0794873B2 JP 62127023 A JP62127023 A JP 62127023A JP 12702387 A JP12702387 A JP 12702387A JP H0794873 B2 JPH0794873 B2 JP H0794873B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- piston
- refrigerant
- valve body
- fluid passage
- 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.)
- Expired - Lifetime
Links
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- Magnetically Actuated Valves (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、電磁弁の開口を徐々に行う技術に関するもの
であり、特に複数台の室内ユニットを接続したマルチタ
イプのヒートポンプ式空調機に用いられる冷媒流路開閉
用電磁弁である。TECHNICAL FIELD The present invention relates to a technique for gradually opening a solenoid valve, and is particularly used for a multi-type heat pump type air conditioner in which a plurality of indoor units are connected. 2 is a solenoid valve for opening and closing a refrigerant passage.
１台の室外ユニットと複数台の室内ユニットからなる空
気調和機としては、例えば第２図に示すようなヒートポ
ンプを利用したマルチエアコンがある。図においてＡは
室外ユニット、Ｂは室内ユニット、Ｃは気化された冷媒
を圧縮する圧縮機、Ｄは４方弁、Ｅは冷媒液化防止のた
めに用いられる電磁弁、Ｆは電気式膨張弁、Ｇは逆止弁
である。図中の矢符号の実線は冷房時、破線は暖房時の
冷媒の流れる方向を示している。An air conditioner including one outdoor unit and a plurality of indoor units is, for example, a multi-air conditioner using a heat pump as shown in FIG. In the figure, A is an outdoor unit, B is an indoor unit, C is a compressor for compressing vaporized refrigerant, D is a four-way valve, E is a solenoid valve used to prevent refrigerant liquefaction, and F is an electric expansion valve. G is a check valve. In the figure, the solid line of the arrow mark indicates the cooling medium flowing direction, and the broken line indicates the flowing direction of the refrigerant during heating.
このシステムでは、暖房時には電磁弁Ｅを開けて室内ユ
ニットへ高温高圧ガスとなっている冷媒の供給をする。In this system, at the time of heating, the electromagnetic valve E is opened to supply the refrigerant, which is high-temperature and high-pressure gas, to the indoor unit.
一方冷房時にはこの電磁弁Ｅは不要であり、開口してお
けばよいのであるが、単に開口しておくためだけに通電
するのは無駄であり、開口し忘れる危険性もある。その
ために、冷房時にはこの電磁弁Ｅは通電を止めて閉止
し、室内ユニットＢで蒸発し過熱蒸気となった冷媒ガス
はこの電磁弁Ｅと並列に設けられた逆止弁Ｇを通って圧
縮機Ｃに流れるようにしている。On the other hand, at the time of cooling, the electromagnetic valve E is not necessary and may be opened. However, it is useless to energize only to keep it open, and there is a risk of forgetting to open it. Therefore, during cooling, the electromagnetic valve E stops energizing and closes, and the refrigerant gas evaporated in the indoor unit B and turned into superheated vapor passes through the check valve G provided in parallel with the electromagnetic valve E to compress the compressor. I am trying to flow to C.
このマルチシステムにおいて、暖房時に室内ユニットを
使用しない場合、その室内ユニットへの冷媒液化防止用
電磁弁Ｅを閉じて高温高圧のガスの状態にある冷媒の供
給を止める。しかし室内ユニットＢに充満していたガス
はその後室内の温度により冷却され液化する。この液化
した冷媒が室内ユニットに溜るのを防ぐために膨張弁Ｆ
は開けておき、冷媒が室外ユニットＡ側に吸引されるよ
うにしておく。一方圧縮機Ｃは１台でも室内ユニットが
使用されていれば稼働するので、冷媒ガスの圧力は同じ
レベルを保つ。従って冷媒液化防止用電磁弁Ｅの両側に
は大きな圧力差がかかることになり、次に暖房をしよう
として電磁弁Ｅを開口すると、急激に大量の冷媒が通過
するので大きな冷媒通過音を発生するという問題を有し
ている。In this multi-system, when the indoor unit is not used during heating, the refrigerant liquefaction prevention solenoid valve E is closed to the indoor unit to stop the supply of the refrigerant in the high temperature and high pressure gas state. However, the gas filled in the indoor unit B is cooled and liquefied by the temperature in the room thereafter. In order to prevent the liquefied refrigerant from accumulating in the indoor unit, the expansion valve F
Is opened so that the refrigerant is sucked to the outdoor unit A side. On the other hand, even if only one compressor C is used when the indoor unit is used, the pressure of the refrigerant gas is kept at the same level. Therefore, a large pressure difference is applied to both sides of the refrigerant liquefaction prevention solenoid valve E, and when the solenoid valve E is opened for heating next time, a large amount of refrigerant rapidly passes and a large refrigerant passage noise is generated. I have a problem.
上記の冷媒通過音が発生するのは、従来の電磁弁はその
電磁コイルに通電されると、直ちに弁を全開してしまい
開口速度を加減出来ないという欠点があるためである。
また冷房時のために逆止弁を並列に取りつけるので、器
具や配管が余計に必要となりコストアップの原因ともな
る。電磁弁と逆止弁を並列に設けるかわりに１つの可逆
弁を設けることも考えられるが、冷房時には弁として機
能しないことが要件であり、この目的に合う可逆弁はな
い。The above-mentioned refrigerant passing sound is generated because the conventional solenoid valve has a drawback that when the solenoid coil is energized, the valve is immediately fully opened and the opening speed cannot be adjusted.
Also, since the check valves are mounted in parallel for cooling, extra equipment and piping are required, which causes a cost increase. It is conceivable to provide one reversible valve instead of providing the solenoid valve and the check valve in parallel, but it is a requirement that they do not function as valves during cooling, and there is no reversible valve for this purpose.
本発明は上記従来技術の欠点の解消を図ったもので、弁
の開口を徐々に行うとともに、逆方向の流れに対しては
弁として機能しない電磁弁を提供することを目的として
いる。The present invention is intended to solve the above-mentioned drawbacks of the prior art, and an object thereof is to provide a solenoid valve that gradually opens a valve and does not function as a valve against a flow in the opposite direction.
本発明は、上記の目的を達成するために、弁本体に第１
流体通路，第２流体通路開口部を設けるとともに、その
間に弁座を設け、弁室内に該弁座に接離する弁体を摺動
自在に嵌挿し、該弁体の上部にピストンを移動自在に設
け、該弁体とピストンとの間の弁室と上記第２流体通路
開口部との差圧を制御するパイロット電磁弁を設け、弁
体が弁座に当接している状態では該弁体はピストンとの
間に間隙を有し、該弁体の上昇時において該ピストンに
当接し押し上げることを特徴としている。In order to achieve the above object, the present invention provides a first valve body.
A fluid passage and a second fluid passage opening are provided, and a valve seat is provided between them, and a valve body that comes into contact with and separates from the valve seat is slidably inserted into the valve chamber, and a piston is movable above the valve body. And a pilot solenoid valve for controlling the pressure difference between the valve chamber between the valve body and the piston and the second fluid passage opening, and the valve body is in contact with the valve seat. Has a gap between it and the piston, and when the valve body rises, it comes into contact with the piston and pushes it up.
本発明の実施例を第１図により説明する。図において１
は弁本体、２は弁室で、弁室の上部は拡大されて弁室拡
大部２′となっており、弁室と拡大部の間に仕切壁３が
介在している。弁室２の下部には第１流体通路開口部４
と、弁座５を形成された第２流体通路開口部６が設けら
れている。弁室２の下部には弁座５を開閉する弁体７が
摺動可能に嵌挿され、弁室上部の拡大部２′にはピスト
ン８がやはり摺動可能に嵌挿され、これら両者の間には
若干の間隙９があり、弁体７が弁座５から少し離れたと
きに当接するようになっている。ピストン８の上下の圧
力を均一にするために、ピストン８と弁室拡大部２′の
間に微小間隙による均圧路10が設けられている。弁体７
とピストン８の間の弁室２と第２流体通路６をつなぐ管
路11,11′とこの管路の中間にパイロット電磁弁12が設
けられ、管路の両端の差圧を制御する。符号P1は第１流
体通路４における圧力を示し、P2は第２流体通路６にお
ける圧力を示す。An embodiment of the present invention will be described with reference to FIG. 1 in the figure
Is a valve body, 2 is a valve chamber, and the upper portion of the valve chamber is enlarged to form a valve chamber expanded portion 2 ', and a partition wall 3 is interposed between the valve chamber and the expanded portion. A first fluid passage opening 4 is provided at the bottom of the valve chamber 2.
And a second fluid passage opening 6 having a valve seat 5 is provided. A valve body 7 for opening and closing the valve seat 5 is slidably inserted in the lower portion of the valve chamber 2, and a piston 8 is also slidably inserted in an enlarged portion 2'of the upper portion of the valve chamber. There is a slight gap 9 between them so that the valve body 7 abuts when the valve body 7 is slightly separated from the valve seat 5. In order to make the upper and lower pressures of the piston 8 uniform, a pressure equalizing passage 10 with a minute gap is provided between the piston 8 and the valve chamber expanding portion 2 '. Disc 7
Pilot solenoid valve 12 is provided in the middle of the pipe lines 11 and 11 'that connect the valve chamber 2 between the piston 8 and the second fluid passage 6, and the pipe line 11 and 11' to control the differential pressure between both ends of the pipe line. Reference symbol P 1 indicates the pressure in the first fluid passage 4, and P 2 indicates the pressure in the second fluid passage 6.
第３図は第１図に示す電磁弁を第２図の従来のマルチシ
ステムに使用したもので、対応する構成要素には同一の
符号を付して示してある。FIG. 3 shows the solenoid valve shown in FIG. 1 used in the conventional multi-system shown in FIG. 2. Corresponding components are designated by the same reference numerals.
次ぎに本発明の作用について第１図，第３図によって説
明する。室外ユニットＡにより加熱され過熱蒸気となっ
た冷媒は、四方弁Ｄにより圧縮機Ｃに送られ高温高圧の
ガスとなり再び四方弁を通って電磁弁Ｅに供給される。
この電磁弁Ｅが開口されていると冷媒は室内ユニットＢ
へと流れ、室内ユニットの表面で室内の冷気と熱交換
し、室内を暖房するとともに自身は放熱して冷却され、
過冷却液となる。液化して冷媒は膨張弁Ｆを通り室外ユ
ニットＡに戻って再び加熱され、暖房のサイクルを構成
する。複数の室内ユニットＢのうち、不使用のものにつ
いては電磁弁Ｅを閉じて冷媒の供給を停止する。第１図
においてパイロット電磁弁12が閉じ、弁体７が弁座５に
圧接した状態になるが、高温高圧の冷媒は第１流体通路
４から弁室２および弁室拡大部２′に充満し、その圧力
はP1と等しくなる。一方P2はP1より低いので弁体７は弁
座５に圧接され弁は閉止の状態をたもつ。このまま不使
用としておけば、やがて室内ユニット内の圧力が下が
り、前述したようにP1とP2の差が大きくなってくる。Next, the operation of the present invention will be described with reference to FIGS. The refrigerant that has been heated by the outdoor unit A and has become superheated steam is sent to the compressor C by the four-way valve D, becomes high-temperature and high-pressure gas, and is again supplied to the solenoid valve E through the four-way valve.
When the solenoid valve E is opened, the refrigerant is discharged from the indoor unit B.
Flows into the room, exchanges heat with the cool air in the room on the surface of the indoor unit, heats the room and at the same time radiates and cools itself.
It becomes supercooled liquid. The liquefied refrigerant passes through the expansion valve F, returns to the outdoor unit A, and is heated again to form a heating cycle. For the unused indoor units B, the electromagnetic valve E is closed to stop the supply of the refrigerant. In FIG. 1, the pilot solenoid valve 12 is closed and the valve body 7 is in pressure contact with the valve seat 5, but the high temperature and high pressure refrigerant is filled from the first fluid passage 4 into the valve chamber 2 and the valve chamber expansion portion 2 ′. , Its pressure is equal to P 1 . On the other hand, since P 2 is lower than P 1 , the valve element 7 is pressed against the valve seat 5 and the valve remains closed. If it is not used as it is, the pressure in the indoor unit will eventually decrease, and the difference between P 1 and P 2 will increase as described above.
P1とP2の差が大きくなった状態から再び使用する場合
は、まず第１図においてパイロット電磁弁12をオンにす
ると弁室の弁体７とピストン８の間にある冷媒が第２流
体通路６へと流出し、弁室の圧力が下がりP2と等しくな
るので弁体７は上方へ若干の間隙９だけ押し上げられ弁
は第１段階の開口をする。この開口は小さく通過する冷
媒の量も少ないことから冷媒の通過音は生じない。一方
弁室拡大部２′は当初P1の圧力となっていたが、均圧路
10から弁体上部へ徐々に冷媒が流出し、弁室拡大部２′
内の圧力は低下してピストン８は弁体７に徐々に押し上
げられるように上昇し、弁の第２段階の開口がされる。When the pilot solenoid valve 12 is turned on in FIG. 1 when the valve is to be used again after the difference between P 1 and P 2 becomes large, the refrigerant between the valve body 7 and the piston 8 in the valve chamber becomes the second fluid. As it flows out into the passage 6 and the pressure in the valve chamber falls and becomes equal to P 2 , the valve body 7 is pushed upward by a slight gap 9 and the valve opens in the first stage. Since this opening is small and the amount of the refrigerant passing therethrough is small, no refrigerant passing sound is generated. On the other hand the valve chamber expanding section 2 'had initially a pressure of P 1, Hitoshi passage
The refrigerant gradually flows out from 10 to the upper part of the valve body, and the valve chamber expansion part 2 '
The internal pressure decreases and the piston 8 rises so as to be gradually pushed up by the valve body 7, and the valve is opened in the second stage.
弁が開口され冷媒が流れている状態であっても弁による
圧力降下によってP2はP1と等しくならず、若干低い圧力
となっている。Even when the valve is opened and the refrigerant is flowing, P 2 is not equal to P 1 due to the pressure drop due to the valve, and the pressure is slightly lower.
弁を閉じる場合は、電磁弁12を閉じる。すると冷媒が第
１流体通路開口部から弁体７と弁本体１との間隙を通っ
て弁体７の上部に流入し弁体７の上部の圧力は上昇して
P1となり、弁体の下部は第２流体通路６に面しているの
でP1より若干低いP2の圧力しかないから、P1とP2の圧力
差及び弁体７の自重により弁体７は下方に押し下げられ
弁座５に当接して弁を閉じる。弁室拡大部２′の内部の
圧力も均圧路10からの冷媒の流入により、P1の圧力へと
上昇しピストン８は仕切壁３に当接する。When closing the valve, the solenoid valve 12 is closed. Then, the refrigerant flows into the upper part of the valve body 7 through the gap between the valve body 7 and the valve body 1 from the opening of the first fluid passage, and the pressure of the upper part of the valve body 7 rises.
P 1 becomes, since there is only a slight pressure of lower P 2 than P 1 because the lower portion of the valve body facing the second fluid passage 6, the valve body by the weight of the pressure difference and the valve body 7 of the P 1 and P 2 7 is pushed down and abuts on the valve seat 5 to close the valve. The pressure inside the valve chamber expansion portion 2'also rises to the pressure P 1 due to the inflow of the refrigerant from the pressure equalizing passage 10, and the piston 8 contacts the partition wall 3.
本発明においては、ピストン８の慣性は弁体７のそれよ
り大きい方が弁の開口はよりゆっくりとなるので効果が
上がることから、ピストン８を下方に付勢するばね手段
を設けてもよい。均圧路10を狭くすれば第２段階の開口
を遅くすることができるので、ピストン８を嵌挿する弁
室は必ずしも拡大部である必要はなく、逆に小さくてし
もよい。In the present invention, if the inertia of the piston 8 is larger than that of the valve body 7, the valve opening becomes slower and the effect is improved. Therefore, spring means for urging the piston 8 downward may be provided. Since the second-stage opening can be delayed by narrowing the pressure equalizing passage 10, the valve chamber in which the piston 8 is fitted and inserted does not necessarily have to be an enlarged portion, but may be made smaller on the contrary.
冷房時は、冷媒の流れる向きは反対となり、室内ユニッ
トで気化された冷媒は第２流体通路６に供給され、圧力
はP2の方がP1より高くなり、弁体７は押し上げられ冷媒
は弁を通過していく。即ち、この方向の流体の流れに対
しては弁として機能しない。従って第３図に図示するよ
うに逆止弁が不要となる。ただし、この場合電磁弁12は
閉じられていなければならず、もし開けられているとP2
の圧が弁体７の上下から加わり、受圧面積の大きい上方
からの力が強くなり、弁体７は弁座５に圧接されて開か
なくなってしまう。During cooling, the refrigerant flows in the opposite direction, the refrigerant vaporized in the indoor unit is supplied to the second fluid passage 6, the pressure P 2 becomes higher than P 1 , the valve body 7 is pushed up, and the refrigerant becomes Pass through the valve. That is, it does not function as a valve for the fluid flow in this direction. Therefore, the check valve is not required as shown in FIG. However, in this case the solenoid valve 12 must be closed, and if it is opened P 2
Is applied from above and below the valve body 7, and the force from above with a large pressure receiving area becomes strong, and the valve body 7 is pressed against the valve seat 5 and cannot open.
本発明によれば、弁本体に第１流体通路，第２流体通路
開口部を設けるとともに、その間に弁座を設け、弁体の
上部にピストンを移動自在に設け、弁体とピストンとの
間の弁室と上記第２流体通路開口部との差圧を制御する
パイロット電磁弁を設け、弁体が弁座に当接している状
態では該弁体はピストンとの間に間隙を有し、該弁体の
上昇時において該ピストンに当接し押し上げることを特
徴としているので、第１流体通路から第２流体通路への
流れの流体に対しては、徐々に開口する電磁弁となり、
第２流体通路から第１流体通路への流れの流体に対して
は弁として機能させないことができる。According to the present invention, the valve body is provided with the first fluid passage and the second fluid passage opening, the valve seat is provided between them, and the piston is movably provided on the upper portion of the valve body so that the piston is provided between the valve body and the piston. Is provided with a pilot solenoid valve for controlling the differential pressure between the valve chamber and the second fluid passage opening, and when the valve body is in contact with the valve seat, the valve body has a gap between it and the piston, It is characterized in that when the valve body rises, it abuts against the piston and pushes it up, so it becomes a solenoid valve that gradually opens for fluid flowing from the first fluid passage to the second fluid passage,
The fluid of the flow from the second fluid passage to the first fluid passage may not function as a valve.
以上のような簡単な構造によりヒートポンプ式マルチシ
ステム運転等における電磁弁開口時に発生する冷媒の通
過音を防止することができるという格別の効果を達成す
ることができる。With such a simple structure as described above, it is possible to achieve a special effect of preventing the passage noise of the refrigerant generated when the solenoid valve is opened in the heat pump type multi-system operation or the like.
第１図は本発明の１実施例の２段階動作型電磁弁の断面
図、 第２図はヒートポンプ式冷暖房装置のマルチシステムの
従来例を示す構成図、 第３図は同上のシステムへの本発明の使用例を示す構成
図であり、第４図は第１図のＸ−Ｘ線に沿う平面におい
て切断した断面図である。 １……弁本体、２……弁室、４……第１流体通路開口
部、５……弁座、６……第２流体通路開口部、７……弁
体、８……ピストン、９……間隙、12……パイロット電
磁弁。FIG. 1 is a sectional view of a two-stage operation type solenoid valve of one embodiment of the present invention, FIG. 2 is a configuration diagram showing a conventional example of a multi-system of a heat pump type air conditioner, and FIG. 3 is a book for the same system. It is a block diagram which shows the usage example of invention, and FIG. 4 is sectional drawing cut | disconnected in the plane which follows the XX line of FIG. 1 ... Valve body, 2 ... Valve chamber, 4 ... First fluid passage opening, 5 ... Valve seat, 6 ... Second fluid passage opening, 7 ... Valve body, 8 ... Piston, 9 …… Gap, 12 …… Pilot solenoid valve.
Claims (1)
部を設けるとともに、その間に弁座を設け、弁室内に該
弁座に接離する弁体を摺動自在に嵌挿し、該弁体の上部
にピストンを移動自在に設け、該弁体とピストンとの間
の弁室と上記第２流体通路開口部との差圧を制御するパ
イロット電磁弁を設け、弁体が弁座に当接している状態
では該弁体はピストンとの間に間隙を有し、該弁体の上
昇時において該ピストンに当接し押し上げることを特徴
とする２段階動作型電磁弁。1. A valve body is provided with a first fluid passage opening and a second fluid passage opening portion, a valve seat is provided between them, and a valve element which is brought into contact with and separated from the valve seat is slidably fitted into the valve chamber. A piston is movably provided above the valve body, and a pilot solenoid valve for controlling the differential pressure between the valve chamber between the valve body and the piston and the second fluid passage opening is provided, and the valve body is a valve seat. The two-stage operation type solenoid valve, wherein the valve element has a gap between the piston and the piston when the valve element is in contact with the piston, and the valve element contacts and pushes up when the valve element rises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62127023A JPH0794873B2 (en) | 1987-05-26 | 1987-05-26 | 2-stage operation solenoid valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62127023A JPH0794873B2 (en) | 1987-05-26 | 1987-05-26 | 2-stage operation solenoid valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63293373A JPS63293373A (en) | 1988-11-30 |
| JPH0794873B2 true JPH0794873B2 (en) | 1995-10-11 |
Family
ID=14949770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62127023A Expired - Lifetime JPH0794873B2 (en) | 1987-05-26 | 1987-05-26 | 2-stage operation solenoid valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0794873B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10240835B2 (en) | 2012-10-03 | 2019-03-26 | Denso Corportion | Refrigeration cycle device and pilot on-off valve |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006316852A (en) * | 2005-05-11 | 2006-11-24 | Saginomiya Seisakusho Inc | Pilot operated solenoid valve and heat exchange system using the same |
| CN102052468A (en) * | 2009-11-01 | 2011-05-11 | 浙江三花制冷集团有限公司 | Flow path switch control device |
| CN108223891B (en) * | 2014-12-08 | 2019-07-12 | 宝嘉智能科技(南通)有限公司 | Power station main steam system top steam discharge electromagnetic relief valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531498Y2 (en) * | 1977-12-02 | 1980-07-26 |
-
1987
- 1987-05-26 JP JP62127023A patent/JPH0794873B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10240835B2 (en) | 2012-10-03 | 2019-03-26 | Denso Corportion | Refrigeration cycle device and pilot on-off valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63293373A (en) | 1988-11-30 |
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