JP3295710B2 - Valve element for four-way switching valve and method of manufacturing the same - Google Patents
Valve element for four-way switching valve and method of manufacturing the sameInfo
- Publication number
- JP3295710B2 JP3295710B2 JP32574293A JP32574293A JP3295710B2 JP 3295710 B2 JP3295710 B2 JP 3295710B2 JP 32574293 A JP32574293 A JP 32574293A JP 32574293 A JP32574293 A JP 32574293A JP 3295710 B2 JP3295710 B2 JP 3295710B2
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- valve
- bowl
- synthetic resin
- way switching
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、空調装置等における可
逆冷凍サイクルに用いられる四方切換弁用の弁体に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve element for a four-way switching valve used in a reversible refrigeration cycle in an air conditioner or the like.
【０００２】[0002]
【従来の技術】冷凍サイクルの冷媒通路に四方切換弁を
設け、この四方切換弁によって冷媒通路を切り換えるこ
とにより、例えば室内の冷房と暖房を切換ることを行っ
ている。この四方切換弁としては各種のものが採用され
ているが、その１つとして、シリンダ状の弁本体に圧縮
機の吐出管に対する接続口と圧縮機の吸入管に対する接
続口を設け、このうち圧縮機の吸入管に対する接続口を
挾んで両側に２個の熱交換機に連通する導管に対するる
接続口を配置し、中央に位置する吸入管に対する接続口
と、隣接する片側の熱交換機に連通する導管に対する接
続口とを覆うように椀状の弁体を摺動自在に設け、この
弁体の両側に設けたピストンに対して流体圧を供給する
ことにより弁体を摺動させ、中央の接続口と両側の接続
口のうちのいずれかとを接続するよう切換える四方切換
弁が採用されている。2. Description of the Related Art A four-way switching valve is provided in a refrigerant passage of a refrigeration cycle, and the refrigerant passage is switched by the four-way switching valve, for example, to switch between indoor cooling and heating. Various ones are used as the four-way switching valve. One of them is to provide a connection port for the discharge pipe of the compressor and a connection port for the suction pipe of the compressor in the cylinder-shaped valve body. A connection port for a conduit communicating with two heat exchangers is disposed on both sides of a connection port for a suction pipe of the machine, and a connection port for a suction pipe located at the center and a conduit communicating with an adjacent heat exchanger on one side. A bowl-shaped valve body is slidably provided so as to cover the connection port with respect to the valve body, and the valve body is slid by supplying fluid pressure to pistons provided on both sides of the valve body so that the center connection port is provided. And a four-way switching valve for switching between the two ports.
【０００３】このような四方切換弁の弁体は従来より金
属材で形成したが、弁シートに対する摺動面を気密状に
平滑に加工することが困難であり、その加工に多くの手
数を要していた。また、弁体の外周囲の高圧室内の高熱
と弁体の内部の低熱とが熱伝導性のよい金属製弁体を伝
導して熱交換して逃げてしまい、冷凍サイクルの熱効率
低下の原因ともなっていた。Conventionally, the valve element of such a four-way switching valve is formed of a metal material. However, it is difficult to smoothly and hermetically seal the sliding surface with respect to the valve seat. Was. In addition, high heat in the high-pressure chamber around the outside of the valve body and low heat inside the valve body conduct through the metal valve body having good thermal conductivity to exchange heat and escape, thereby causing a decrease in the thermal efficiency of the refrigeration cycle. I was
【０００４】上記摺動面の気密性保持の対策として椀状
の弁体の下面の摺動部に合成樹脂部材を配置し、弁体に
対しビス止め等の手段で固定することが考案されてい
る。しかしながら、弁体の繰り返しの摺動により合成樹
脂が摩滅してくると、ビスが摺動面に出現してくること
となり、円滑な弁体の摺動がなされなくなる。As a countermeasure for maintaining the airtightness of the sliding surface, it has been devised to dispose a synthetic resin member on the sliding portion on the lower surface of the bowl-shaped valve body and fix it to the valve body by means such as screws. I have. However, if the synthetic resin wears out due to repeated sliding of the valve body, screws will appear on the sliding surface, and smooth sliding of the valve body will not be achieved.
【０００５】また、弁体の伝熱対策として金属製弁体を
二重に形成し、内部に空隙を形成することにより熱の伝
導防止を行うことが考慮されている。その際、弁体の円
滑な作動等のため弁体を軽量化する必要性から、二重の
弁体の各金属板を薄くする必要がある。しかしながら、
この弁体の外周囲は高圧室であり、内部は低圧室である
のでその圧力差により弁体が変形しないようにする必要
があり、そのため内部に空隙を有する二重の金属製弁体
を、適宜の位置に両者間に間隙を保持し、相互に固定す
るリベット止めを施す必要がある。そのため、リベット
止め作業はリベット止め部から冷媒漏れを生じることが
なく、かつ変形しないよう作業を行う必要があり、多く
の手数を要する。また、この場合もその摺動部には気密
性と円滑な作動のため、上記のような樹脂製摺動部材を
設ける必要があり、上記のような欠点を生じる。Further, as a measure against heat transfer of the valve body, it is considered to form a double metal valve body and form a gap therein to prevent heat conduction. At this time, it is necessary to reduce the weight of the valve body for smooth operation of the valve body, and thus it is necessary to make each metal plate of the double valve body thin. However,
The outer periphery of this valve body is a high-pressure chamber, and the inside is a low-pressure chamber, so it is necessary to prevent the valve body from being deformed by the pressure difference.Therefore, a double metal valve body having a void inside, It is necessary to provide a gap between the two at an appropriate position and to perform riveting to fix them to each other. Therefore, it is necessary to perform the riveting operation without causing the refrigerant to leak from the riveting portion and to prevent the refrigerant from being deformed, which requires much trouble. Also, in this case, it is necessary to provide the above-mentioned resin sliding member for the airtightness and smooth operation of the sliding portion, and the above-mentioned drawbacks occur.
【０００６】[0006]
【発明が解決しようとする課題】上記従来のものの欠点
を解消するため、弁体全体を合成樹脂製とすることが考
慮されている。この合成樹脂製弁体は、摺動部も当然合
成樹脂材であるので円滑に作動し、かつ摺動部が摩滅し
ても従来のようなビス等の金属部材が出現することな
く、長期に亘って円滑に作動することができる。また、
弁体全体が合成樹脂製であるので熱伝導率が低く、弁体
を通して伝熱する量が少なくなるので冷凍サイクルの効
率低下も防止することができる。In order to solve the above-mentioned disadvantages of the prior art, it has been considered that the entire valve body is made of synthetic resin. This synthetic resin valve element operates smoothly because the sliding part is also a synthetic resin material, and even if the sliding part is worn out, the conventional metal member such as a screw does not appear, and it can be used for a long time. It can operate smoothly throughout. Also,
Since the entire valve body is made of a synthetic resin, the thermal conductivity is low, and the amount of heat transferred through the valve body is reduced, so that a decrease in the efficiency of the refrigeration cycle can be prevented.
【０００７】しかしながら、前記のようにこの弁体の内
外は大きな圧力差があるため、その圧力差で変形し易
く、変形すると特に弁体の摺動面の微少な変形によって
内外の冷媒ガスの圧力差で冷媒が噴出し多量の漏れを生
じることとなる。その対策としては硬質樹脂を用いるか
弁体の厚さを大きくする等の手段が考えられるが、硬質
樹脂の使用の場合は高価となり、また摺動性が低下し、
また、弁体を厚くすると弁本体を大型にしなければなら
ず、更に急激な温度変化による歪の量が大きくなり、熱
変形により摺動面のシール性が低下することとなる。However, since there is a large pressure difference between the inside and outside of the valve element as described above, the valve element is easily deformed due to the pressure difference. The difference causes the refrigerant to squirt and cause a large amount of leakage. As a countermeasure, means such as using a hard resin or increasing the thickness of the valve body can be considered, but in the case of using a hard resin, it becomes expensive and the slidability is reduced,
Further, when the valve body is thickened, the valve body must be large, the amount of distortion due to a rapid temperature change increases, and the sealing performance of the sliding surface decreases due to thermal deformation.
【０００８】したがって、本発明は、軽量でかつ充分な
強度を有し、伝熱損失が少なくしかもシール性が良く、
長期間円滑に作動する四方切換弁用弁体を提供すること
することを目的とする。Therefore, the present invention is lightweight, has sufficient strength, has little heat transfer loss, and has good sealing properties.
It is an object of the present invention to provide a valve element for a four-way switching valve that operates smoothly for a long time.
【０００９】 本発明は、上記課題を解決するために、
圧縮機側に連通する吐出管と圧縮機側に連通する吸入管
と該吸入管に隣接して各々熱交換器に連通する２個の導
管とを配置し、前記吸入管と導管との開口上に弁シート
を設けた弁本体と、前記弁シート上を摺動して前記吸入
管と導管との連通状態を切換える外周囲に環状鍔部を有
する椀状弁体とを備えた四方切換弁において、前記弁体
の椀状部の外面側は合成樹脂材料で形成され、該弁体の
椀状部の内面側は金属板体を前記合成樹脂材料で一体成
形されるとともに前記環状鍔部は前記金属板体が前記合
成樹脂材料に埋設されて環状に形成され、前記椀状部の
内面側の長さ方向中央位置の下部には金属製ピンが押し
込まれ懸架されている四方切換弁用弁体、及び金属製ピ
ンの両端部を押し込むことができる下型の上面に、弁体
の椀状内面形状に一致する内面を有し、環状鍔部の埋込
部を有する金属板体を下型に載置する工程と、その上に
弁体の外面形状をなす上型を覆せる工程と、注入口から
合成樹脂を射出する工程と、冷却後、上型と下型を分離
し離型する工程と、離型直後に椀状の弁体の長さ方向中
央位置の下部に、金属製ピンを押し込む工程とからなる
四方切換弁用弁体を製造するものである。The present invention has been made in order to solve the above problems.
A discharge pipe communicating with the compressor side, a suction pipe communicating with the compressor side, and two conduits respectively adjacent to the suction pipe and communicating with the heat exchanger are arranged on the opening between the suction pipe and the conduit. A four-way switching valve comprising a valve body having a valve seat provided thereon, and a bowl-shaped valve body having an annular flange on an outer periphery for switching a communication state between the suction pipe and the conduit by sliding on the valve seat. The outer surface side of the bowl-shaped portion of the valve body is formed of a synthetic resin material, and the inner surface side of the bowl-shaped portion of the valve body is a metal plate integrally formed of the synthetic resin material, and the annular flange portion is formed of the synthetic resin material. A metal plate is buried in the synthetic resin material to form an annular shape, and a metal pin is pushed into and suspended at a lower portion of a central portion in the length direction on the inner surface side of the bowl-shaped portion. , And on the upper surface of the lower mold to which both ends of the metal pin can be pushed, A step of placing a metal plate having an inner surface to be fitted and having an embedded portion of an annular flange in a lower mold, and a step of covering an upper mold forming an outer shape of the valve body thereon, A step of injecting a synthetic resin, a step of separating an upper mold and a lower mold after cooling, and a step of pressing a metal pin into a lower portion of a bowl-shaped valve body in the longitudinal direction immediately after the mold release. And a valve element for a four-way switching valve.
【００１０】[0010]
【作用】本発明は、上記のように構成したので、弁シー
ト上を弁体がスライドすることにより、圧縮機の吐出管
に連通する高圧室が低圧側接続口に隣接して配置した２
個の接続口のうち一方と連通し、圧縮機の吸入管に連通
する低圧側接続口は他方の接続口と接続する。弁体が接
続口の開口上を他方側にスライドすると、高圧室は、そ
れまで低圧側接続口と接続していた接続口と接続する一
方、低圧側接続口は、それまで高圧室と連通していた接
続口と接続することにより四方切換弁の作用をなす。こ
の時、弁体に一体成形した金属板体により弁体が合成樹
脂製であるにもかかわらず、弁体内外の大きな圧力差に
よっても変形することなく、シール面が変形せず確実な
シールをなすとともに、シールを行いつつスライドする
スライド面が合成樹脂製であるので円滑にスライドし、
また、弁体が合成樹脂製であるので断熱性が良い。According to the present invention, the high pressure chamber communicating with the discharge pipe of the compressor is arranged adjacent to the low pressure side connection port by sliding the valve on the valve seat.
The low-pressure side connection port communicating with one of the connection ports and communicating with the suction pipe of the compressor is connected to the other connection port. When the valve slides over the opening of the connection port to the other side, the high-pressure chamber connects to the connection port previously connected to the low-pressure connection port, while the low-pressure connection port communicates with the high-pressure chamber until then. By connecting to the connection port, the function of the four-way switching valve is achieved. At this time, despite the fact that the valve body is made of a synthetic resin by means of a metal plate integrally molded with the valve body, the seal surface is not deformed even by a large pressure difference inside and outside the valve body, and a reliable seal is obtained without deformation of the sealing surface. As well as sliding, the slide surface that slides while performing sealing is made of synthetic resin, so it slides smoothly,
In addition, since the valve body is made of a synthetic resin, heat insulation is good.
【００１１】[0011]
【実施例】本発明の実施例を図面に沿って説明する。図
１に示すように、シリンダ状の四方切換弁の弁本体１の
両端部には栓体２，３が固着されており、弁本体１の上
部側壁には圧縮機４の吐出管５が連結され、また下部側
壁には、圧縮機４の吸入管６に接続される低圧接続口１
１ａを挾んで、それぞれ２個の熱交換器７，８へ連結す
る導管９，１０に接続される接続口１１ｂ，１１ｃが、
軸方向に隣接して形成された弁シート１１に設けられて
いる。An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, stoppers 2 and 3 are fixed to both ends of a valve body 1 of a cylindrical four-way switching valve, and a discharge pipe 5 of a compressor 4 is connected to an upper side wall of the valve body 1. The lower side wall has a low-pressure connection port 1 connected to a suction pipe 6 of the compressor 4.
The connection ports 11b and 11c connected to the conduits 9 and 10 connected to the two heat exchangers 7 and 8, respectively, sandwiching 1a,
It is provided on a valve seat 11 formed adjacent to the axial direction.
【００１２】弁本体１内において、弁シート１１と栓体
２との間にはピストン１２が、また栓体３との間にはピ
ストン１３が摺動自在に設けられ、ピストン１２とピス
トン１３との間に高圧室Ｒ1 が形成されている。ピスト
ン１２とピストン１３とは連結板１４によって連結され
て連動するように構成され、ピストン１２と栓体２との
間に形成された作動室Ｒ2 及びピストン１３と栓体３と
の間に形成された作動室Ｒ3 とは、それぞれ導管２´
及び導管３´ によって四方切換パイロット弁１５に連
結しており、作動室Ｒ2 及びＲ3 のいずれか一方が導管
５´ によつて吐出管５に連通するとき、他方が導管６
´ によって吸入管６に連通するよう構成されている。In the valve body 1, a piston 12 is provided between the valve seat 11 and the plug 2, and a piston 13 is provided between the valve 3 and the plug 3 so as to be slidable. high pressure chamber R 1 is formed between the. The piston 12 and the piston 13 is configured to work are connected by a connecting plate 14, formed between the piston 12 and the plug working chamber is formed between the 2 R 2 and the piston 13 and the plug 3 The working chamber R 3 is connected to the conduit 2 ′.
And it is connected to the four-way switching pilot valve 15 by a conduit 3 ', when either one of the working chambers R 2 and R 3 are communicated with by connexion discharge pipe 5 to the conduit 5' and the other conduit 6
′ To communicate with the suction pipe 6.
【００１３】弁シート１１上には、連通用凹部１６ａを
有する椀状の弁体１６が設けられ、弁体１６は連結板１
４の穴に緩く嵌合されている。したがって、弁体１６
は、ピストン１２及び１３が移動するに伴って弁シート
１１上を摺動し、低圧側接続口１１ａをその両側の熱交
換器側接続口１１ｂ，１１ｃのいずれか一方と連通させ
ると共に、他方の熱交換器側接続口を高圧室Ｒ1 に開放
する。On the valve seat 11, a bowl-shaped valve element 16 having a communication recess 16a is provided.
4 is loosely fitted. Therefore, the valve element 16
Is slid on the valve seat 11 as the pistons 12 and 13 move, making the low-pressure side connection port 11a communicate with one of the heat exchanger side connection ports 11b and 11c on both sides thereof, and the other side. opening the heat exchanger-side connection port to the high pressure chamber R 1.
【００１４】この弁体１６の外側は合成樹脂製であり、
その内面に金属板体２０を一体形成している。また、図
２、図３に示すように、椀状の弁体の長さ方向中央位置
には、両側壁２１，２２を支持するピン２３を固定して
いる。The outside of the valve body 16 is made of synthetic resin.
The metal plate 20 is integrally formed on the inner surface. Further, as shown in FIGS. 2 and 3, a pin 23 for supporting the side walls 21 and 22 is fixed at a longitudinal center position of the bowl-shaped valve body.
【００１５】その製造に際しては、図５に示すように、
弁体１６の内面形状をなす下型２４の上面の適宜の位置
に突起２５を設けておき、その上に前記突起２５に係合
する孔２６を設け、弁体１６の内面形状に一致する内面
を有し、水平状の埋込部２７を有する金属板体２０を下
型２４の突起２５に孔２６を係合させて載置する。その
上に弁体１６の外面形状をなす上型２８を覆せ、注入口
２９から合成樹脂を射出し、冷却後上型と下型を分離し
離型する。離型直後に椀状の弁体１６の長さ方向中央位
置の下部に、両端に突起３１を備えた金属製のピン２３
を押し込み、１６０℃で２乃至４時間気中アニールを行
い、冷却後下端面の摺動面３３を０．３乃至０．５ｍｍ
切削研削することにより弁体１６は完成する。At the time of manufacture, as shown in FIG.
A projection 25 is provided at an appropriate position on the upper surface of the lower mold 24 that forms the inner surface shape of the valve body 16, and a hole 26 that engages with the projection 25 is provided thereon, and an inner surface that matches the inner surface shape of the valve body 16 is provided. And the metal plate 20 having the horizontal embedded portion 27 is placed with the hole 26 engaged with the projection 25 of the lower mold 24. The upper mold 28 which forms the outer surface of the valve body 16 is covered thereon, and synthetic resin is injected from the injection port 29. After cooling, the upper mold and the lower mold are separated and separated. Immediately after release, a metal pin 23 having projections 31 at both ends is provided at the lower portion of the bowl-shaped valve body 16 in the longitudinal center position.
, And air-annealed at 160 ° C. for 2 to 4 hours. After cooling, the sliding surface 33 on the lower end face is 0.3 to 0.5 mm.
The valve body 16 is completed by cutting and grinding.
【００１６】上記弁体１６を形成する樹脂としては、耐
熱、耐圧性を有し適度の摺動なじみを有する各種の樹脂
が使用可能であるが、例えばＰＰＳ（ポリフェニレンサ
ルファイド）樹脂あるいはＰＦＡ（四弗化エチレン・パ
ーフルオロアルコキシエチレン）樹脂等が適切であり、
補強用の金属板体２０としてはステンレス鋼等が適切で
ある。As the resin forming the valve body 16, various resins having heat resistance and pressure resistance and having a suitable sliding fit can be used. For example, PPS (polyphenylene sulfide) resin or PFA (tetrafluoroethylene) resin is used. Ethylene perfluoroalkoxyethylene) resin, etc.
As the reinforcing metal plate 20, stainless steel or the like is appropriate.
【００１７】このように構成された本発明の四方弁は、
冷凍システムにおいて冷媒の流れを冷房時と暖房時とに
切換える時等に使用され、図１は例えば冷房運転時の四
方切換弁の状態を示している。すなわち、パイロット弁
１５は、作動室Ｒ3 が導管３´と５´を経て吐出管５に
連通し、また作動室Ｒ2 が導管２´と６´を経て吸入管
６に連通する状態となっており、ピストン１２が引かれ
るとともにピストン１３が押されて弁シート１１に接近
している。The four-way valve of the present invention having the above-described structure is
It is used when switching the flow of refrigerant between cooling and heating in a refrigeration system, and FIG. 1 shows, for example, the state of a four-way switching valve during cooling operation. That is, the pilot valve 15 is in a state where the working chamber R 3 communicates with the discharge pipe 5 via the conduits 3 ′ and 5 ′, and the working chamber R 2 communicates with the suction pipe 6 via the conduits 2 ′ and 6 ′. The piston 12 is pulled and the piston 13 is pushed to approach the valve seat 11.
【００１８】したがって、弁体１６は、連結板１４によ
って接続口１１ａと接続口１１ｃとを連通する位置にあ
り、接続口１１ｂは高圧室Ｒ1 に対し開放されている。
そのため、圧縮機４から吐出管５を経て高圧室Ｒ1に供
給された高圧高温の冷媒は、接続口１１ｂから導管９を
経て熱交換器７に入って凝縮し、絞り手段１７を経て熱
交換器８に入り、蒸発して導管１０から弁体１６の連通
用凹部１６ａを通り、吸入管６を経て圧縮機４に戻るよ
うに循環する。[0018] Thus, the valve body 16 is at a position to communicate the connection port 11c and the connection port 11a by a connecting plate 14, connecting port 11b is open to the high pressure chamber R 1.
Therefore, the high-pressure and high-temperature refrigerant supplied from the compressor 4 to the high-pressure chamber R 1 via the discharge pipe 5 enters the heat exchanger 7 via the connection port 11 b via the conduit 9, condenses, and exchanges heat via the throttle means 17. The gas enters the vessel 8, evaporates and circulates from the conduit 10 through the communication recess 16 a of the valve body 16, and returns to the compressor 4 via the suction pipe 6.
【００１９】次にパイロット弁１５が転換すると、作動
室Ｒ3 内の冷媒は、導管３´及び６´を経て吸入管６に
逃げ、一方、作動室Ｒ2 には、導管５´及び２´を経て
高圧冷媒が供給される。そのためピストン１２は圧力の
差によって押され、弁シート１１へ接近する。したがっ
て、弁体１６は、連結板１４によって押され接続口１１
ａと接続口１１ｂとを連通する位置に移動し、接続口１
１ｃは高圧室Ｒ1 に対し、開放される。その結果、冷媒
は、導管１０を経て熱交換器８で凝縮し、絞り手段１７
を経て熱交換器７で蒸発し、導管９から吸入管６へと流
れ圧縮機４に戻り、図１に示した冷房時の通過順序に対
して逆転し、暖房運転に切り換わる。[0019] Then when the pilot valve 15 is converted, the refrigerant in the working chamber R 3 is fled to the suction pipe 6 through conduits 3 'and 6', while the working chamber R 2 are conduits 5 'and 2' The high-pressure refrigerant is supplied through. Therefore, the piston 12 is pushed by the pressure difference and approaches the valve seat 11. Therefore, the valve body 16 is pushed by the connecting plate 14 and the connection port 11 is pressed.
a to the position where the connection port 11b communicates with the connection port 11b.
1c whereas the high pressure chamber R 1, is opened. As a result, the refrigerant is condensed in the heat exchanger 8 through the conduit 10, and the condensing means 17
After that, it evaporates in the heat exchanger 7, flows from the conduit 9 to the suction pipe 6, returns to the compressor 4, reverses the cooling passage order shown in FIG. 1, and switches to the heating operation.
【００２０】このように、弁体１６は外周囲から高温の
冷媒の圧力を受けて弁シート１１に圧着された状態で摺
動するが、合成樹脂製弁体に金属板体２０が一体成形さ
れているので、弁体を薄くしても金属板体の補強作用に
より変形することなく、変形によりシート面とのシール
性が低下し、冷媒ガス漏れ等を生じることがなくなる。
また金属板体２０は弁体に一体成形されているので、冷
凍システムの霜取り作動時等のように、弁体内に急激な
温度変化を生じる際に合成樹脂製弁体に変形を生じよう
とするが、金属板体２０で一体的に保持されているので
変形することなく、金属板体の剥離を生じることもな
い。As described above, the valve body 16 slides in a state of being pressed against the valve seat 11 by receiving the pressure of the high-temperature refrigerant from the outer periphery, but the metal plate 20 is integrally formed with the synthetic resin valve body. Therefore, even if the valve body is made thin, it does not deform due to the reinforcing action of the metal plate body, and the deformation reduces the sealing performance with the seat surface, thereby preventing refrigerant gas leakage and the like.
Further, since the metal plate 20 is integrally formed with the valve body, the synthetic resin valve body tends to be deformed when a sudden temperature change occurs in the valve body, such as during a defrosting operation of the refrigeration system. However, since they are integrally held by the metal plate 20, they are not deformed and the metal plate does not peel off.
【００２１】[0021]
【００２２】[0022]
【発明の効果】本発明は、上記のように構成し作用する
ので、弁体は合成樹脂製のため熱伝導率が低く、弁体を
通じて高温の冷媒と低温の冷媒が熱交換し、冷凍サイク
ルの効率を低下させることが少なくなる。また、弁体の
スライド時に、摺動面が合成樹脂であるので円滑に作動
することができ、摩耗しても直ちに金属製部材が露出す
ることがないので、長期間安定して作動することができ
る。Since the present invention is constructed and operated as described above, the valve body is made of a synthetic resin and has a low thermal conductivity. High-temperature refrigerant and low-temperature refrigerant exchange heat through the valve body, and the refrigeration cycle is performed. The efficiency of the process is reduced. In addition, when the valve body slides, the sliding surface is made of a synthetic resin, so that it can operate smoothly, and even if it is worn, the metal member is not immediately exposed, so that it can operate stably for a long period of time. it can.
【００２３】また、合成樹脂製弁体に金属板体を一体成
形して設けているので、弁体全体を薄くしても充分強度
を保持することができ、弁全体を小型化することができ
る。また、霜取り時等、弁体内が急激に温度変化する際
に合成樹脂製弁体に変形を生じようとするが、金属板体
で一体的に保持されているので、変形することがなく、
金属板体の剥離も生じない。更に弁体が金属板体により
強固になるので、弁体の内外圧差により変形することが
なく、弁体の変形によりシールしつつスライドする弁体
のスライド面が変形することがなくなり、変形によりシ
ール性が低下し、弁体の内外間で冷媒の漏れを生じなく
なり、冷凍機が長期間安定して作動することができる。Further, since the metal plate is formed integrally with the valve body made of synthetic resin, sufficient strength can be maintained even if the entire valve body is thinned, and the entire valve can be downsized. . In addition, when the temperature inside the valve body suddenly changes, such as when defrosting, the synthetic resin valve body tends to deform, but since it is integrally held by the metal plate, it does not deform,
No peeling of the metal plate occurs. Further, since the valve body is made stronger by the metal plate body, the valve body does not deform due to the pressure difference between the inside and outside of the valve body, and the sliding surface of the valve body that slides while sealing due to the deformation of the valve body does not deform. Therefore, the refrigerant does not leak between the inside and outside of the valve body, and the refrigerator can operate stably for a long period of time.
【００２３】また、金属板体は、合成樹脂により弁体を
成形する際、同時に埋め込み固定が行われるので、弁体
に後で金属弁体を固定する場合と比較し、速くかつ容易
に製作することができる。Further, since the metal plate is embedded and fixed at the same time when the valve is molded from synthetic resin, the metal plate is manufactured quickly and easily as compared with the case where the metal valve is fixed to the valve later. be able to.
【図１】本発明の実施例の冷凍サイクルへの適用状態と
共に示す断面図である。FIG. 1 is a cross-sectional view showing a state in which an embodiment of the present invention is applied to a refrigeration cycle.
【図２】本発明の弁体の実施例の断面図である。FIG. 2 is a sectional view of an embodiment of the valve body of the present invention.
【図３】同底面図である。FIG. 3 is a bottom view of the same.
【図４】図２のＡ−Ａ部分断面図である。FIG. 4 is a partial sectional view taken along line AA of FIG. 2;
【図５】図２に示す弁体の製造時の状態を示す断面図で
ある。FIG. 5 is a sectional view showing a state at the time of manufacturing the valve body shown in FIG. 2;
１ 弁本体 ２ 栓体 ３ 栓体 ４ 圧縮機 ５ 吐出管 ６ 吸入管 ７ 熱交換器 ８ 熱交換器 ９ 導管 １０ 導管 １１ 弁シート １１ａ 接続口 １１ｂ 接続口 １１ｃ 接続口 １２ ピストン １３ ピストン １４ 連結板 １５ パイロット弁 １６ 弁体 １６ａ 連通用凹部 ２０ 金属板体 ２１ 側壁 ２２ 側壁 ２３ ピン ２４ 下型 ２５ 突起 ２６ 孔 ２７ 埋込部 ２８ 上型 ２９ 注入口 ３１ 突起 ３３ 摺動面 DESCRIPTION OF SYMBOLS 1 Valve main body 2 Plug body 3 Plug body 4 Compressor 5 Discharge pipe 6 Suction pipe 7 Heat exchanger 8 Heat exchanger 9 Duct 10 Duct 11 Valve seat 11a Connection port 11b Connection port 11c Connection port 12 Piston 13 Piston 14 Connecting plate 15 Pilot valve 16 Valve element 16a Communication recess 20 Metal plate 21 Side wall 22 Side wall 23 Pin 24 Lower mold 25 Projection 26 Hole 27 Embedded part 28 Upper mold 29 Injection 31 Projection 33 Sliding surface
Claims (2)
連通する吸入管と該吸入管に隣接して各々熱交換器に連
通する２個の導管とを配置し、前記吸入管と導管との開
口上に弁シートを設けた弁本体と、前記弁シート上を摺
動して前記吸入管と導管との連通状態を切換える外周囲
に環状鍔部を有する椀状弁体とを備えた四方切換弁にお
いて、前記弁体の椀状部の外面側は合成樹脂材料で形成
され、該弁体の椀状部の内面側は金属板体を前記合成樹
脂材料で一体成形されるとともに前記環状鍔部は前記金
属板体が前記合成樹脂材料に埋設されて環状に形成さ
れ、前記椀状部の内面側の長さ方向中央位置の下部には
金属製ピンが押し込まれ懸架されていることを特徴とす
る四方切換弁用弁体。1. A discharge pipe communicating with a compressor side, a suction pipe communicating with a compressor side, and two conduits respectively adjacent to the suction pipe and communicating with a heat exchanger, respectively, are arranged. A valve body provided with a valve seat on an opening to a conduit; and a bowl-shaped valve body having an annular flange on an outer periphery for sliding over the valve seat to switch a communication state between the suction pipe and the conduit. In the four-way switching valve, the outer surface side of the bowl-shaped portion of the valve body is formed of a synthetic resin material, and the inner surface side of the bowl-shaped portion of the valve body is integrally formed of a metal plate with the synthetic resin material. The annular flange portion is formed in a ring shape by embedding the metal plate body in the synthetic resin material, and a metal pin is pushed into and suspended from a lower portion of the inner side of the bowl-shaped portion in the longitudinal center position. A valve element for a four-way switching valve.
きる下型の上面に、弁体の椀状内面形状に一致する内面
を有し、環状鍔部の埋込部を有する金属板体を下型に載
置する工程と、その上に弁体の外面形状をなす上型を覆
せる工程と、注入口から合成樹脂を射出する工程と、冷
却後、上型と下型を分離し離型する工程と、離型直後に
椀状の弁体の長さ方向中央位置の下部に、金属製ピンを
押し込む工程とからなることを特徴とする四方切換弁用
弁体の製造方法。2. A metal plate having an inner surface corresponding to a bowl-shaped inner surface shape of a valve body and an embedded portion of an annular flange is provided on an upper surface of a lower die into which both ends of a metal pin can be pushed. A step of placing on the lower mold, a step of covering the upper mold forming the outer surface of the valve body thereon, a step of injecting the synthetic resin from the injection port, and separating and separating the upper mold and the lower mold after cooling. A method of manufacturing a valve element for a four-way switching valve, comprising: a step of molding; and a step of pressing a metal pin into a lower portion of a central portion in a length direction of a bowl-shaped valve element immediately after release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32574293A JP3295710B2 (en) | 1993-12-01 | 1993-12-01 | Valve element for four-way switching valve and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32574293A JP3295710B2 (en) | 1993-12-01 | 1993-12-01 | Valve element for four-way switching valve and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07151251A JPH07151251A (en) | 1995-06-13 |
| JP3295710B2 true JP3295710B2 (en) | 2002-06-24 |
Family
ID=18180150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32574293A Expired - Fee Related JP3295710B2 (en) | 1993-12-01 | 1993-12-01 | Valve element for four-way switching valve and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3295710B2 (en) |
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| JP3263360B2 (en) * | 1998-04-10 | 2002-03-04 | ダイキン工業株式会社 | Four-way switching valve |
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|---|---|---|---|---|
| CN102147023A (en) * | 2010-02-10 | 2011-08-10 | 浙江三花制冷集团有限公司 | Sliding block and manufacturing method thereof as well as reversing valve using sliding block |
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| CN102235522B (en) * | 2010-04-30 | 2014-12-10 | 浙江三花制冷集团有限公司 | Heat exchange equipment and reversing valve thereof |
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| JPH07151251A (en) | 1995-06-13 |
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