JP2010038320A - Valve element for four-way switching valve - Google Patents

Valve element for four-way switching valve Download PDF

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JP2010038320A
JP2010038320A JP2008204243A JP2008204243A JP2010038320A JP 2010038320 A JP2010038320 A JP 2010038320A JP 2008204243 A JP2008204243 A JP 2008204243A JP 2008204243 A JP2008204243 A JP 2008204243A JP 2010038320 A JP2010038320 A JP 2010038320A
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valve body
valve
conduit
way switching
rod
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JP2010038320A5 (en
JP5175144B2 (en
Inventor
Masayuki Imai
正幸 今井
Noriyuki Morita
紀幸 森田
Ryosuke Tsukui
良輔 津久井
Koji Higuchi
浩次 樋口
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Fujikoki Corp
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Fujikoki Corp
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Priority to CN 200910165252 priority patent/CN101644347B/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve element for a four-way switching valve securing smooth movement of fluid inside a valve element by improving mechanical strength of the valve element. <P>SOLUTION: The four-way switching valve includes a valve body 3 having a closed space, a first conducting pipe 5 connected to one side part of the valve body, a second conducting pipe 7 connected to the other side part of the valve body, third/fourth conducting pipe 11, 12 respectively arranged to be adjacent to both sides of the second conducting pipe, a valve seat 16 having opening parts 8, 13, 14 communicating with the conducting pipes in the valve body, and the valve element 1 slidable on the valve seat, and selectively switches the communication status between the first conducting pipe and the third conducting pipe or between the first conducting pipe and the fourth conducting pipe. The valve element is equipped with a pin 1d extended near an opening end surface part 1j of a bowl-like body 1c to cross the opening end surface part 1j, and a collar part (projection part) 1h integrally formed on the body and projecting to the axial direction of the pin from an outer surface of the body to a position near an inner wall surface 3c of the valve body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、冷凍機器、空調機器等の可逆冷凍サイクルを利用した機器等に用いられる四方切換弁の弁体に関する。   The present invention relates to a valve body of a four-way switching valve used in equipment using a reversible refrigeration cycle such as refrigeration equipment and air conditioning equipment.

従来、冷凍サイクルの冷媒通路に四方切換弁を配置して冷媒通路を切り換え、室内の冷房と暖房とを切り換えることが行なわれている。このような四方切換弁として、特許文献1及び2等において種々のものが提案されている。   Conventionally, a four-way switching valve is arranged in the refrigerant passage of the refrigeration cycle to switch the refrigerant passage to switch between indoor cooling and heating. As such a four-way switching valve, various ones have been proposed in Patent Documents 1 and 2 and the like.

上記四方切換弁の1つとして、例えば、図5に記載の四方切換弁61は、密閉中空のシリンダ状の弁本体62に、圧縮機63の吐出管64に連通する接続口65と、圧縮機63の吸入管66に連通する接続口67を設け、この接続口67を挟んで両側に、熱交換機68、69への導管70、71に連通する2つの接続口72、73を配置し、椀状の弁体74を弁座80に摺動自在に設け、この弁体74を摺動させ、中央の接続口67と両側の接続口72、73のいずれか一方との間を選択的に接続する。   As one of the four-way switching valves, for example, a four-way switching valve 61 shown in FIG. 5 includes a sealed hollow cylindrical valve body 62, a connection port 65 communicating with a discharge pipe 64 of a compressor 63, a compressor 63 is provided with a connection port 67 communicating with the suction pipe 66, and two connection ports 72 and 73 communicating with the conduits 70 and 71 to the heat exchangers 68 and 69 are disposed on both sides of the connection port 67. The valve body 74 is slidably provided on the valve seat 80, and the valve body 74 is slid to selectively connect between the central connection port 67 and one of the connection ports 72 and 73 on both sides. To do.

ここで、上記四方切換弁61を構成する弁体74は、金属、合成樹脂、又は金属と樹脂皮膜層とを組み合わせたものなどで形成することができるが、特に、弁体全体を合成樹脂で形成することにより、合成樹脂は摺動性がよいため、安定した弁体の動きを確保することができるとともに、合成樹脂は熱伝導率が低いため、冷凍サイクルの熱効率の低下を防止することもできる。   Here, the valve body 74 constituting the four-way switching valve 61 can be formed of a metal, a synthetic resin, or a combination of a metal and a resin film layer. In particular, the entire valve body is made of a synthetic resin. Since the synthetic resin has good slidability, the stable movement of the valve body can be ensured, and the synthetic resin has low thermal conductivity, so that it can prevent a decrease in the thermal efficiency of the refrigeration cycle. it can.

一方、上記四方切換弁61の弁体74については、弁体74の内外の圧力差による変形に留意する必要があり、特に、弁体74全体を合成樹脂で形成した場合には、弁体74の摺動面74aに微少な変形が生じると、その変形部分から弁体74の内外の冷媒ガスの圧力差によって冷媒が噴出し、冷媒が漏れることとなる。そこで、図6に示すように、合成樹脂製の椀状の本体74cに、本体74cの開口端面部74bを横断するように金属製のピン75を2本差し渡したものも提案されている。尚、ピン75は、両端に鍔部75aを備え、この鍔部75aを本体74cの内壁に形成された段部に圧入することにより本体74cに装着される。   On the other hand, regarding the valve body 74 of the four-way switching valve 61, it is necessary to pay attention to the deformation due to the pressure difference between the inside and the outside of the valve body 74. When a slight deformation occurs in the sliding surface 74a, the refrigerant is ejected from the deformed portion due to the pressure difference between the refrigerant gas inside and outside the valve body 74, and the refrigerant leaks. In view of this, as shown in FIG. 6, there has been proposed one in which two metal pins 75 are passed through a synthetic resin bowl-shaped main body 74 c so as to cross the open end surface portion 74 b of the main body 74 c. The pin 75 is provided with a collar portion 75a at both ends, and is fitted to the main body 74c by press-fitting the collar portion 75a into a step formed on the inner wall of the main body 74c.

特開平11−201297号公報JP 11-201297 A 特開2004−125238号公報JP 2004-125238 A

上記従来の構成において、高圧冷媒(例えばR410A等)の場合、弁体74内外の圧力差が高くなるため、弁体74が変形し、切換動作が円滑に行われなくなったり流体が漏れる等の不具合が生じることがあった。また、逆圧により弁体74が広がり、補強ピン75が脱落することもあった。   In the above-described conventional configuration, in the case of a high-pressure refrigerant (for example, R410A), the pressure difference between the inside and outside of the valve body 74 increases, so that the valve body 74 is deformed and the switching operation cannot be performed smoothly or fluid leaks. Sometimes occurred. In addition, the valve body 74 may spread due to the reverse pressure, and the reinforcing pin 75 may fall off.

そこで、本発明は、上記従来の四方切換弁における問題点に鑑みてなされたものであって、四方切換弁に用いられる弁体の機械的強度を向上させることを目的とする。   Therefore, the present invention has been made in view of the problems in the conventional four-way switching valve, and an object thereof is to improve the mechanical strength of the valve body used in the four-way switching valve.

上記目的を達成するため、本発明は、密閉空間を有する弁本体と、該弁本体の一側部に連結され、前記密閉空間と連通する第1導管と、前記弁本体の他側部に連結され、前記密閉空間と連通する第2導管と、該第2導管を挟んで両側に各々隣接して配置され、前記密閉空間と連通する第3及び第4導管と、前記弁本体内において前記第2乃至第4導管の各々に連通する開口部を有する弁座と、該弁座に摺動可能に配置された弁体とを備え、該弁体を一方向又は他方向に摺動させることにより、前記第1導管と前記第3導管との間、又は前記第1導管と前記第4導管との間の連通状態が選択的に切り換えられる四方切換弁に用いられる前記弁体であって、椀状の本体と、該本体の開口端面部を横断するように、該開口端面部に近接して差し渡される棒状部材と、前記本体の前記開口端面部に近接した位置において、該本体に一体に形成され、該本体の外表面より前記棒状部材の軸線方向に、前記弁本体の内壁面に近接する位置まで突出する鍔部とを備えることを特徴とする。   In order to achieve the above object, the present invention provides a valve body having a sealed space, a first conduit connected to one side of the valve body and communicating with the sealed space, and connected to the other side of the valve body. A second conduit communicating with the sealed space; third and fourth conduits disposed adjacent to both sides of the second conduit and communicating with the sealed space; and the second conduit in the valve body. A valve seat having an opening communicating with each of the second to fourth conduits, and a valve body slidably disposed on the valve seat, and sliding the valve body in one direction or the other direction A valve body used in a four-way switching valve that selectively switches a communication state between the first conduit and the third conduit or between the first conduit and the fourth conduit, The main body and the open end face of the main body so as to cross the open end face. And a position close to the inner wall surface of the valve body in the axial direction of the rod-shaped member from the outer surface of the main body at a position close to the opening end surface portion of the main body. And a ridge that protrudes to the top.

そして、本発明によれば、前記本体の前記開口端面部に近接した位置において、該本体に一体に形成され、該本体の外表面より前記棒状部材の軸線方向に、前記弁本体の内壁面に近接する位置まで突出する鍔部を備えるため、弁本体の寸法を維持したまま、弁体の機械的強度を増強することができる。また、棒状部材の外径を小さくすることができるとともに、棒状部材を弁座に近接して位置させることができる。これにより、棒状部材が弁体の流体通路の内部へ入り込むことがなく、棒状部材が流体抵抗となることを回避することができる。その結果、四方切換弁用弁体の機械的強度を維持しながら、該弁体の内部における円滑な流体の移動を確保することができる。   According to the present invention, at a position close to the opening end surface portion of the main body, the main body is integrally formed with the inner wall surface of the valve main body in the axial direction of the rod-shaped member from the outer surface of the main body. Since the flange portion protruding to the adjacent position is provided, the mechanical strength of the valve body can be increased while maintaining the dimensions of the valve body. Further, the outer diameter of the rod-shaped member can be reduced, and the rod-shaped member can be positioned close to the valve seat. As a result, the rod-shaped member does not enter the fluid passage of the valve body, and the rod-shaped member can be prevented from becoming a fluid resistance. As a result, smooth fluid movement inside the valve body can be ensured while maintaining the mechanical strength of the valve body for the four-way switching valve.

上記四方切換弁用弁体において、前記鍔部の外周面を、前記弁本体の内壁面の曲率半径と略々等しい曲率半径を有するように構成することができる。   In the valve body for a four-way switching valve, the outer peripheral surface of the flange portion can be configured to have a curvature radius substantially equal to the curvature radius of the inner wall surface of the valve body.

また、上記四方切換弁用弁体において、前記棒状部材の中心線が、前記鍔部における前記弁座と反対側の面よりも前記弁座側に位置するように構成することができる。   Moreover, the said valve body for four-way switching valves can be comprised so that the centerline of the said rod-shaped member may be located in the said valve seat side rather than the surface on the opposite side to the said valve seat in the said collar part.

上記四方切換弁用弁体において、前記棒状部材を2本設け、該2本の棒状部材を、互いに平行で、前記第1導管と前記第3導管とが連通した状態において前記第2導管及び前記第4導管の開口面に対向しないとともに、前記第1導管と前記第4導管とが連通した状態において前記第2導管及び前記第3導管の開口面に対向しないように配置することができる。これによって、弁体の機械的強度をさらに高めることができるとともに、2本の棒状部材が流体抵抗となることを回避することができる。尚、2本の棒状部材は、流路にかからない位置において、できるだけ離して配置することが好ましい。また、前記棒状部材を1本設け、該棒状部材が両端に前記弁体に接する矩形状の鍔部を備えるようにしてもよい。   In the valve body for a four-way switching valve, two rod-shaped members are provided, and the two rod-shaped members are parallel to each other, and the first conduit and the third conduit communicate with each other. It can be arranged so as not to oppose the opening surface of the fourth conduit and not to oppose the opening surfaces of the second conduit and the third conduit in a state where the first conduit and the fourth conduit communicate with each other. Accordingly, the mechanical strength of the valve body can be further increased, and the two rod-shaped members can be prevented from becoming fluid resistance. In addition, it is preferable to arrange | position two rod-shaped members as much as possible in the position which does not reach a flow path. Further, one rod-like member may be provided, and the rod-like member may be provided with a rectangular flange portion that is in contact with the valve body at both ends.

以上のように、本発明によれば、弁体の機械的強度が向上するとともに弁体の内部における円滑な流体の移動を確保することができる。   As described above, according to the present invention, the mechanical strength of the valve body can be improved and smooth fluid movement within the valve body can be ensured.

次に、本発明の実施の形態について図面を参照しながら説明する。尚、以下の説明においては、本発明にかかる弁体を備えた四方切換弁を空調機器に用いる場合を例にとって説明する。   Next, embodiments of the present invention will be described with reference to the drawings. In the following description, a case where a four-way switching valve provided with a valve body according to the present invention is used in an air conditioner will be described as an example.

図1は、本発明にかかる弁体1を用いた四方切換弁2を示す。この四方切換弁2は、大別して、円筒状の弁本体3と、圧縮機4の吐出管5に連通する開口部6と、圧縮機4の吸入管7に連通する開口部8と、この開口部8を挟んで両側に、熱交換機9、10への導管11、12に連通する2つの開口部13、14と、これらの開口部8、13、14を有し、椀状の弁体1が摺動する弁座16とを備え、弁体1が弁座16上を摺動することで、吐出管5と、導管11又は導管12のいずれか一方を選択的に接続する。   FIG. 1 shows a four-way switching valve 2 using a valve body 1 according to the present invention. The four-way switching valve 2 is roughly divided into a cylindrical valve body 3, an opening 6 communicating with the discharge pipe 5 of the compressor 4, an opening 8 communicating with the suction pipe 7 of the compressor 4, and this opening There are two openings 13 and 14 communicating with the conduits 11 and 12 to the heat exchangers 9 and 10 on both sides of the part 8, and these openings 8, 13 and 14, and the bowl-shaped valve body 1 And the valve body 1 slides on the valve seat 16 to selectively connect the discharge pipe 5 and either the conduit 11 or the conduit 12.

弁本体3は、両端部に栓体3a、3bが固着された円筒状に形成され、弁本体3の上側には開口部6が形成され、開口部6に圧縮機4に接続される吐出管5が連結される。弁本体3の下側には、圧縮機4の吸入管7と、熱交換機9、10への導管11、12が連結され、弁本体3の内部の弁座16に、これらの導管等の開口部8、13、14が穿設される。   The valve body 3 is formed in a cylindrical shape with stoppers 3 a and 3 b fixed to both ends, an opening 6 is formed on the upper side of the valve body 3, and a discharge pipe connected to the compressor 4 at the opening 6. 5 are connected. A suction pipe 7 of the compressor 4 and conduits 11 and 12 to the heat exchangers 9 and 10 are connected to the lower side of the valve body 3, and openings such as these conduits are opened in a valve seat 16 inside the valve body 3. Portions 8, 13, and 14 are drilled.

また、弁本体3の内部には、弁座16と栓体3aとの間にピストン17が、弁座16と栓体3bとの間にピストン18が設けられ、ピストン17、18の間に、高圧室20が形成される。ピストン17、18は、連結板19によって一体的に移動可能に連結される。また、ピストン17と栓体3aとの間に形成された作動室21と、ピストン18と栓体3bとの間に形成された作動室22とは、導管23、24を介して四方切換パイロット弁25に連結されている。パイロット弁25が、作動室21、22の間に介在することにより、作動室21、22のいずれか一方が、導管26によって吐出管5に連通するとき、他方の作動室が導管27によって吸入管7に連通するように構成される。   Further, inside the valve body 3, a piston 17 is provided between the valve seat 16 and the plug body 3a, a piston 18 is provided between the valve seat 16 and the plug body 3b, and between the pistons 17 and 18, A high pressure chamber 20 is formed. The pistons 17 and 18 are connected by a connecting plate 19 so as to be integrally movable. A working chamber 21 formed between the piston 17 and the plug body 3a and a working chamber 22 formed between the piston 18 and the plug body 3b are connected to the four-way switching pilot valve via conduits 23 and 24. 25. By interposing the pilot valve 25 between the working chambers 21, 22, when one of the working chambers 21, 22 communicates with the discharge pipe 5 through the conduit 26, the other working chamber is connected to the suction pipe by the conduit 27. 7 to be communicated.

弁本体3の内部の弁座16上には、連通用凹部(流体通路)1aと、環状の鍔部1bとを有する椀状の弁体1が設けられる。弁体1は、連結板19の孔19a内に緩く嵌合されている。これにより、弁体1は、ピストン17、18が図1において左右方向に移動することに伴って弁座16上を摺動し、圧縮機4に接続された吸入管7の低圧側の開口部8を、その両側の熱交換機側の開口部13、14のいずれか一方と連通させるとともに、他方の熱交換機側開口部を高圧室20に開放する。   On the valve seat 16 inside the valve body 3, a bowl-shaped valve body 1 having a communication recess (fluid passage) 1a and an annular flange 1b is provided. The valve body 1 is loosely fitted in the hole 19 a of the connecting plate 19. As a result, the valve body 1 slides on the valve seat 16 as the pistons 17 and 18 move in the left-right direction in FIG. 1, and opens on the low pressure side of the suction pipe 7 connected to the compressor 4. 8 is communicated with one of the heat exchanger side openings 13 and 14 on both sides thereof, and the other heat exchanger side opening is opened to the high pressure chamber 20.

弁体1は、図2に示すように、全体が合成樹脂により射出成形され、内部に連通用凹部1aと、環状の鍔部1bとを備える椀状の本体1cと、金属からなり、両端に矩形状の鍔部1fを一体に備えたピン(棒状部材)1dと、本体1cを弁座16に圧接する押さえ部材としての板ばね1eとで構成される。ピン1dは、両端の鍔部1fを、本体1cの段部1gに圧入するとともに、鍔部1fの外側面から突出した突起1hを本体1cの凹部1iに嵌入することで、本体1cの開口端面部1jを横断するように、開口端面部1jに近接して差し渡される。板ばね1eは平面視矩形の環状に形成され、両端部が本体1cの鍔部1bの上面に接している。板ばね1eにおける両端部よりも内側の部分は台形状に隆起し、その上面が連結板19に当接して下方に撓んだ状態になっており、本体1cを弁座16に圧接している。   As shown in FIG. 2, the valve body 1 is made of a synthetic resin and is entirely molded by a synthetic resin. The valve body 1 is formed of a bowl-shaped main body 1 c having a communication recess 1 a and an annular flange 1 b, and metal. A pin (bar-shaped member) 1 d integrally provided with a rectangular flange 1 f and a leaf spring 1 e as a pressing member that presses the main body 1 c against the valve seat 16 are configured. The pin 1d presses the flange portions 1f at both ends into the stepped portion 1g of the main body 1c, and the projection 1h protruding from the outer surface of the flange portion 1f is fitted into the concave portion 1i of the main body 1c, thereby opening the opening end surface of the main body 1c. It is passed close to the opening end face part 1j so as to cross the part 1j. The leaf spring 1e is formed in an annular shape having a rectangular shape in plan view, and both end portions are in contact with the upper surface of the flange portion 1b of the main body 1c. The portion of the leaf spring 1e that is inside the both ends protrudes in a trapezoidal shape, the upper surface of which is in contact with the connecting plate 19 and is bent downward, and presses the main body 1c against the valve seat 16. .

また、弁体1の鍔部1bのうち、ピン1dの軸線方向に突出する部分(以下、「突出部」という)1kの外周面は、図2(c)、(d)に示すように、弁本体3の内壁面3cに近接する位置まで突出し、その外周面は、図2(d)に明示されるように、弁本体3の内壁面3cの曲率半径R1と略々等しい曲率半径R2を有する。これにより、突出部1kの下端と弁本体3の内壁面3cとの間の隙間aと、突出部1kの外周面と弁本体3の内壁面3cとの間の隙間a’とが略々等しくなり、弁体1が流体の圧力の影響で弁本体3側へ移動しても、内壁面3cに接触するおそれが少なくなる。また、弁体1に逆圧(流体が図2(d)の下から上へ流れる)が発生して弁体1が浮き上がったとき、弁体1内部の流体が鍔部1bと弁座16の間から弁体1の上側に逃げることになるが、aとa’とが略々等しく、流体が逃げる通路の断面積が略々同一で変化しないため、弁体1の内圧が上昇するのを防ぐことができる。   Further, the outer peripheral surface of a portion 1b of the flange 1b of the valve body 1 that protrudes in the axial direction of the pin 1d (hereinafter referred to as “projection”) is as shown in FIGS. As shown in FIG. 2D, the outer peripheral surface of the valve body 3 protrudes to a position close to the inner wall surface 3c of the valve body 3, and has a curvature radius R2 that is substantially equal to the curvature radius R1 of the inner wall surface 3c of the valve body 3. Have. Thereby, the clearance gap a between the lower end of the protrusion part 1k and the inner wall face 3c of the valve main body 3, and the clearance gap a 'between the outer peripheral surface of the protrusion part 1k and the inner wall face 3c of the valve main body 3 are substantially equal. Thus, even if the valve body 1 moves to the valve body 3 side due to the influence of the fluid pressure, the possibility of contact with the inner wall surface 3c is reduced. Further, when a reverse pressure (fluid flows from the bottom to the top in FIG. 2D) is generated in the valve body 1 and the valve body 1 is lifted up, the fluid in the valve body 1 flows between the flange 1b and the valve seat 16. However, since a and a ′ are substantially equal and the cross-sectional area of the passage through which the fluid escapes is substantially the same and does not change, the internal pressure of the valve body 1 increases. Can be prevented.

さらに、鍔部1bの上面が広いため、弁体1を弁座16に圧接する板ばね1eを安定して支持することができ、弁体1を確実に押さえて弁体1と弁座16の間からの流体の漏れを防ぐことができる。また、板ばね1eの外周縁を鍔部1bの上面の外周縁よりも内側に位置させることができるので、弁体1が移動しても板ばね1eの外周縁が弁本体3の内壁面3cに接触するおそれがないとともに、板ばね1eが吐出圧力により変形しにくいので、弁体1に対する荷重が均一になって流体漏れが生じにくく、弁体1のスライドがスムーズになる。   Furthermore, since the upper surface of the flange 1b is wide, the leaf spring 1e that presses the valve body 1 against the valve seat 16 can be stably supported, and the valve body 1 and the valve seat 16 can be reliably pressed down. It is possible to prevent fluid leakage from between. Further, since the outer peripheral edge of the leaf spring 1e can be positioned inside the outer peripheral edge of the upper surface of the flange portion 1b, the outer peripheral edge of the leaf spring 1e remains the inner wall surface 3c of the valve body 3 even when the valve body 1 moves. Since the leaf spring 1e is not easily deformed by the discharge pressure, the load on the valve body 1 becomes uniform and fluid leakage hardly occurs, and the valve body 1 slides smoothly.

さらに、本実施形態では、図2(d)に示すように、本体1cの鍔部1bを高くして、その上面がピン1dの中心線よりも距離bだけ上方に位置するようにしている。従来品は、ピン1dの中心線が鍔部1bの上面よりも上方に位置しており、それに比べて鍔部1bの強度が向上するとともに、ピン1dを本体1cに圧入する際や、本体1cの内外に圧力差が生じた場合に本体1cが広がりにくくなるため、ピン1dが脱落しにくくなる。   Further, in the present embodiment, as shown in FIG. 2D, the flange portion 1b of the main body 1c is raised so that the upper surface thereof is positioned above the center line of the pin 1d by a distance b. In the conventional product, the center line of the pin 1d is located above the upper surface of the flange portion 1b. Compared with this, the strength of the flange portion 1b is improved, and when the pin 1d is press-fitted into the main body 1c, or the main body 1c. When a pressure difference occurs between the inside and outside of the body, the main body 1c is difficult to spread, and thus the pin 1d is difficult to drop off.

上記構成を有する四方切換弁2は、図1に示すように、空調機器において冷媒の流れを冷房と暖房に切り換える場合に使用される。このとき、弁体1は、外周囲から高温の冷媒の圧力を受けて、弁座16に押圧された状態で弁座16上を摺動する。この際、図3に示すように、突出部1kを弁本体3の内壁面3cに近接する位置まで突出させることで、弁体1の本体1cの機械的強度を高めているため、2本のピン1dの外径を小さくすることができるとともに、2本のピン1dを弁座16に近接した位置で、互いに近接して位置させることができる。これにより、吐出管5と導管11が連通した状態において各ピン1dが吸入管7と導管12の開口面に対向しないとともに、吐出管5と導管12とが連通した状態において各ピン1dが吸入管7と導管11の開口面に対向しない。よって、ピン1dが導管11、12の流れを直接遮ることはなく、また、ピン1dが弁座16の摺動面16aから所定距離以上離れて弁体1の連通用凹部1aの流体通路内部へ入り込むことがないため、流体L3の抵抗となり難く、円滑な流体の移動を確保することができる。尚、図4に示すように、ピン1dは1本であってもよい。   As shown in FIG. 1, the four-way switching valve 2 having the above-described configuration is used when the refrigerant flow is switched between cooling and heating in an air conditioner. At this time, the valve body 1 receives the pressure of the high-temperature refrigerant from the outer periphery and slides on the valve seat 16 while being pressed by the valve seat 16. At this time, as shown in FIG. 3, the projecting portion 1 k is projected to a position close to the inner wall surface 3 c of the valve body 3 to increase the mechanical strength of the body 1 c of the valve body 1. The outer diameter of the pin 1d can be reduced, and the two pins 1d can be positioned close to each other at a position close to the valve seat 16. Accordingly, each pin 1d does not face the opening surface of the suction pipe 7 and the conduit 12 in a state where the discharge pipe 5 and the conduit 11 communicate with each other, and each pin 1d becomes a suction pipe in a state where the discharge pipe 5 and the conduit 12 communicate with each other. 7 and the opening surface of the conduit 11 are not opposed. Therefore, the pin 1d does not directly block the flow of the conduits 11 and 12, and the pin 1d is separated from the sliding surface 16a of the valve seat 16 by a predetermined distance or more into the fluid passage of the communication recess 1a of the valve body 1. Since it does not enter, it is difficult to become resistance of the fluid L3, and smooth fluid movement can be ensured. In addition, as shown in FIG. 4, the pin 1d may be one.

尚、上記実施の形態においては、弁体1の突出部1kの外周面を弁本体3の内壁面3cの曲率半径R1と略々等しい曲率半径R2を有するように構成したが、突出部1kの形状はこれに限定されず、弁体1の突出部1kの外周面が弁本体3の内壁面3cと当接しない範囲で種々の形状とすることができる。   In the above embodiment, the outer peripheral surface of the protrusion 1k of the valve body 1 is configured to have a curvature radius R2 that is substantially equal to the curvature radius R1 of the inner wall surface 3c of the valve body 3. The shape is not limited to this, and various shapes can be employed as long as the outer peripheral surface of the protruding portion 1 k of the valve body 1 does not contact the inner wall surface 3 c of the valve body 3.

また、上記実施の形態においては、本発明にかかる弁体1を備えた四方切換弁2を空調機器に用いる場合を例にとって説明したが、空調機器以外にも、冷凍機器等他の可逆冷凍サイクルを利用した機器、さらには、冷凍サイクルを利用した機器以外にも、流体を四方に切り換える必要がある機器に使用することができる。   Moreover, in the said embodiment, although the case where the four-way switching valve 2 provided with the valve body 1 concerning this invention was used for an air-conditioning apparatus was demonstrated to the example, other reversible refrigeration cycles, such as refrigeration equipment other than an air-conditioning apparatus, were demonstrated. In addition to equipment using the refrigeration, and equipment using the refrigeration cycle, it can be used for equipment that needs to switch the fluid in four directions.

本発明にかかる弁体を用いた四方切換弁を示す断面図である。It is sectional drawing which shows the four-way switching valve using the valve body concerning this invention. 図1の弁体を示す図であって、(a)は正面断面図、(b)は底面図、(c)は側断面図、(d)は(c)の一部拡大図である。It is a figure which shows the valve body of FIG. 1, Comprising: (a) is front sectional drawing, (b) is a bottom view, (c) is side sectional drawing, (d) is the partially expanded view of (c). 図2の弁体と弁座との関係を示す図であって、(a)は正面断面図、(b)は(a)のB−B線断面図、(c)は(a)のA−A線断面図である。It is a figure which shows the relationship between the valve body of FIG. 2, and a valve seat, Comprising: (a) is front sectional drawing, (b) is BB sectional drawing of (a), (c) is A of (a). FIG. 弁体の他の実施形態を示す図であって、(a)は正面断面図、(b)は底面図である。It is a figure which shows other embodiment of a valve body, Comprising: (a) is front sectional drawing, (b) is a bottom view. 従来の四方切換弁の一例を示す断面図である。It is sectional drawing which shows an example of the conventional four-way switching valve. 図5の四方切換弁に用いられる弁体の一例を示す図であって、(a)は正面断面図、(b)は底面図、(c)は側断面図である。It is a figure which shows an example of the valve body used for the four-way selector valve of FIG. 5, Comprising: (a) is front sectional drawing, (b) is a bottom view, (c) is a sectional side view.

符号の説明Explanation of symbols

1 弁体
1a 連通用凹部
1b 鍔部
1c 本体
1d ピン(棒状部材)
1e 板ばね
1f 鍔部
1g 段部
1h 突起
1i 凹部
1j 開口端面部
2 四方切換弁
3 弁本体
3a 栓体
3b 栓体
3c 内壁面
4 圧縮機
5 吐出管
6 開口部
7 吸入管
8 開口部
9 熱交換機
10 熱交換機
11 導管
12 導管
13 開口部
14 開口部
16 弁座
16a 摺動面
17 ピストン
18 ピストン
19 連結板
20 高圧室
21 作動室
22 作動室
23 導管
24 導管
25 四方切換パイロット弁
26 導管
27 導管
DESCRIPTION OF SYMBOLS 1 Valve body 1a Communication recessed part 1b Gutter part 1c Body 1d Pin (bar-shaped member)
1e leaf spring 1f flange 1g step 1h projection 1i recess 1j open end face 2 four-way switching valve 3 valve body 3a plug 3b plug 3c inner wall 4 compressor 5 discharge pipe 6 opening 7 suction pipe 8 opening 9 heat Exchanger 10 Heat exchanger 11 Conduit 12 Conduit 13 Opening 14 Opening 16 Valve seat 16a Sliding surface 17 Piston 18 Piston 19 Connecting plate 20 High pressure chamber 21 Working chamber 22 Working chamber 23 Conduit 24 Conduit 25 Four-way switching pilot valve 26 Conduit 27 Conduit

Claims (5)

密閉空間を有する弁本体と、該弁本体の一側部に連結され、前記密閉空間と連通する第1導管と、前記弁本体の他側部に連結され、前記密閉空間と連通する第2導管と、該第2導管を挟んで両側に各々隣接して配置され、前記密閉空間と連通する第3及び第4導管と、前記弁本体内において前記第2乃至第4導管の各々に連通する開口部を有する弁座と、該弁座に摺動可能に配置された弁体とを備え、該弁体を一方向又は他方向に摺動させることにより、前記第1導管と前記第3導管との間、又は前記第1導管と前記第4導管との間の連通状態が選択的に切り換えられる四方切換弁に用いられる前記弁体であって、
椀状の本体と、
該本体の開口端面部を横断するように、該開口端面部に近接して差し渡される棒状部材と、
前記本体の前記開口端面部に近接した位置において、該本体に一体に形成され、該本体の外表面より前記棒状部材の軸線方向に、前記弁本体の内壁面に近接する位置まで突出する鍔部とを備えることを特徴とする四方切換弁用弁体。
A valve body having a sealed space, a first conduit connected to one side of the valve body and communicating with the sealed space, and a second conduit connected to the other side of the valve body and communicating with the sealed space A third and a fourth conduit that are arranged adjacent to each other on both sides of the second conduit and communicate with the sealed space, and an opening that communicates with each of the second to fourth conduits in the valve body. A valve seat having a portion, and a valve body slidably disposed on the valve seat, and by sliding the valve body in one direction or the other direction, the first conduit and the third conduit Or the valve body used in a four-way switching valve in which the communication state between the first conduit and the fourth conduit is selectively switched,
A bowl-shaped body,
A rod-shaped member that is passed close to the opening end surface so as to cross the opening end surface of the main body;
A flange that is formed integrally with the main body at a position close to the opening end surface portion of the main body and protrudes from the outer surface of the main body to the position close to the inner wall surface of the valve main body in the axial direction of the rod-shaped member. And a valve body for a four-way switching valve.
前記鍔部の外周面は、前記弁本体の内壁面の曲率半径と略々等しい曲率半径を有することを特徴とする請求項1に記載の四方切換弁用弁体。   2. The valve body for a four-way switching valve according to claim 1, wherein an outer peripheral surface of the flange has a curvature radius substantially equal to a curvature radius of an inner wall surface of the valve body. 前記棒状部材の中心線が、前記鍔部における前記弁座と反対側の面よりも前記弁座側に位置することを特徴とする請求項1又は2に記載の四方切換弁用弁体。   3. The valve body for a four-way switching valve according to claim 1, wherein a center line of the rod-shaped member is positioned on the valve seat side with respect to a surface of the flange portion opposite to the valve seat. 前記棒状部材を2本備え、該2本の棒状部材は、互いに平行で、前記第1導管と前記第3導管とが連通した状態において前記第2導管及び前記第4導管の開口面に対向しないとともに、前記第1導管と前記第4導管とが連通した状態において前記第2導管及び前記第3導管の開口面に対向しないように配置されることを特徴とする請求項1、2又は3に記載の四方切換弁用弁体。   Two rod-shaped members are provided, and the two rod-shaped members are parallel to each other and do not oppose the opening surfaces of the second conduit and the fourth conduit in a state where the first conduit and the third conduit communicate with each other. In addition, the first conduit and the fourth conduit are arranged so as not to face the opening surfaces of the second conduit and the third conduit in a state where the first conduit and the fourth conduit are in communication with each other. The valve body for a four-way switching valve described. 前記棒状部材を1本備え、該棒状部材は両端に前記弁体に接する矩形状の鍔部を備えることを特徴とする請求項1、2又は3に記載の四方切換弁用弁体。   4. The valve body for a four-way switching valve according to claim 1, wherein one rod-shaped member is provided, and the rod-shaped member is provided with a rectangular flange portion in contact with the valve body at both ends.
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JP2012159101A (en) * 2011-01-31 2012-08-23 Fuji Koki Corp Four-way switching valve
JP2019078283A (en) * 2017-10-20 2019-05-23 株式会社鷺宮製作所 Slidable selector valve and refrigeration cycle system
JP2019124336A (en) * 2018-01-19 2019-07-25 株式会社鷺宮製作所 Slide-type selector valve and refrigeration cycle system including the same

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