JP2013108710A - Gas liquid separator - Google Patents

Gas liquid separator Download PDF

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JP2013108710A
JP2013108710A JP2011255881A JP2011255881A JP2013108710A JP 2013108710 A JP2013108710 A JP 2013108710A JP 2011255881 A JP2011255881 A JP 2011255881A JP 2011255881 A JP2011255881 A JP 2011255881A JP 2013108710 A JP2013108710 A JP 2013108710A
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refrigerant
strainer
gas
suction pipe
liquid separator
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JP5804911B2 (en
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Koji Hosokawa
侯史 細川
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Fujikoki Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a gas liquid separator capable of effectively preventing a strainer from clogging due to foreign matter and reliably returning oil to a compressor.SOLUTION: A gas liquid separator 1 has a cylindrical body 2 one end of which is open, a header 3 which seals an open end of the body and in which a refrigerant inflow hole 3d and a refrigerant outflow hole 3e are bored, a refrigerant ejection pipe 5 one end of which is connected to the refrigerant outflow hole and the other end of which is located near the bottom 2a of the body in the body, a refrigerant suction pipe 4 which surround the refrigerant ejection pipe an end of a header side of which is open, and in which an oil return hole 4a is formed at an end of the bottom side of the body, and the strainer 6 interposed between the oil return hole formed in the refrigerant suction pipe and the inside of the body and is characterized in that the body bottom side end of the refrigerant suction pipe protrudes to the body bottom side while being surrounded by the strainer, and the oil return hole is formed in the distal end of the same.

Description

本発明は、気液分離器に関し、特に、冷凍サイクルを循環する冷媒等を気液分離して貯留する気液分離器に関する。   The present invention relates to a gas-liquid separator, and more particularly to a gas-liquid separator that separates and stores a refrigerant or the like circulating through a refrigeration cycle.

上記気液分離器の一例として、特許文献１には、ハウジングと、ハウジングの上方部に開口して気液二相流体をハウジング内に導入する導入口と、ハウジングの上面に開口してハウジング内より気相流体を外部へ導出する導出口と、ハウジング内に上下方向に配設され、下端がハウジングの下方に開口すると共に、上端が前記導出口に接続される管部と、この管部の上方に形成され、側面が前記導入口と対向して導入流体を衝突させる笠部と、前記管部の外周の配設されて底部がハウジングの底面に固定されると共に、上方開口端が前記笠部内で開口する外側管体とを備えた二重管構造の気液分離器が開示されている。   As an example of the gas-liquid separator, Patent Document 1 discloses a housing, an introduction port that opens to an upper portion of the housing and introduces a gas-liquid two-phase fluid into the housing, and an opening that opens to an upper surface of the housing. A lead-out port for leading out the gas phase fluid to the outside, a pipe part disposed in the vertical direction in the housing, having a lower end opened below the housing, and an upper end connected to the lead-out port, and the pipe part A cap portion formed on the upper side and colliding with the introduction fluid with a side surface facing the introduction port; an outer periphery of the tube portion is disposed and a bottom portion is fixed to a bottom surface of the housing; A gas-liquid separator having a double tube structure including an outer tube body that opens in a section is disclosed.

また、上記気液分離器と同様の構造を有する気液分離器として、図３に示すように、有底筒状の胴体２２と、この胴体２２の上部開口端を封止するヘッダ２３と、胴体２２の内部に配置された筒状の冷媒吐出管２５と、冷媒吐出管２５を囲繞する冷媒吸込管２４と、冷媒吸込管２４の下端部に形成されたオイル戻し穴２４ａを囲繞するように胴体２２の底面２２ａ上に配置されたストレーナ２６と、下方に開口するカップ状の気液分離部材２７等を備える気液分離器が用いられている。   Further, as a gas-liquid separator having the same structure as the gas-liquid separator, as shown in FIG. 3, a bottomed cylindrical body 22 and a header 23 for sealing the upper opening end of the body 22, A cylindrical refrigerant discharge pipe 25 disposed inside the body 22, a refrigerant suction pipe 24 surrounding the refrigerant discharge pipe 25, and an oil return hole 24 a formed at the lower end of the refrigerant suction pipe 24 are surrounded. A gas-liquid separator including a strainer 26 disposed on the bottom surface 22a of the body 22 and a cup-shaped gas-liquid separation member 27 that opens downward is used.

上記気液分離器２１において、蒸発器等からヘッダ２３の冷媒流入孔２３ｄを介して胴体２２の内部に流入した冷媒は、気液分離部材２７によって気液分離され、分離された液冷媒、及び冷媒中に含まれていたコンプレッサオイル（圧縮機用の潤滑油、以下「オイル」という）は、そのまま直進下降して胴体２２の内部に貯留される。その後、液冷媒Ｌとオイルとの分離が進み、オイルは液冷媒Ｌの下方に溜まる。   In the gas-liquid separator 21, the refrigerant that has flowed into the body 22 from the evaporator or the like through the refrigerant inflow hole 23d of the header 23 is gas-liquid separated by the gas-liquid separation member 27, and the separated liquid refrigerant, and Compressor oil contained in the refrigerant (compressor lubricating oil, hereinafter referred to as “oil”) moves straight down and is stored in the fuselage 22. Thereafter, separation between the liquid refrigerant L and the oil proceeds, and the oil accumulates below the liquid refrigerant L.

一方、ガス冷媒は、胴体２２の内部の液冷媒Ｌに合流する前に上方へ移動し、冷媒吸込管２４の上部開口から冷媒吸込管２４の内部に進入し、冷媒吸込管２４の内周面と冷媒吐出管２５の外周面との間を下降した後、一旦冷媒吸込管２４の下端部に達し、オイル戻し穴２４ａから液冷媒Ｌの下方に溜まったオイルを吸引しながら上方へ折り返して冷媒吐出管２５の内部を上昇し、ヘッダ２３の冷媒流出孔２３ｅからオイルを含んだガス冷媒が排出され、圧縮機へ戻される。また、冷媒に含まれていた異物は、上記液冷媒と同様のルートにて胴体２２の底部に達し、ストレーナ２６によって捉えられ、圧縮機への異物の侵入を防止していた。   On the other hand, the gas refrigerant moves upward before joining the liquid refrigerant L inside the fuselage 22, enters the refrigerant suction pipe 24 from the upper opening of the refrigerant suction pipe 24, and the inner peripheral surface of the refrigerant suction pipe 24. And the outer peripheral surface of the refrigerant discharge pipe 25, once reaches the lower end of the refrigerant suction pipe 24, and turns upward while sucking the oil accumulated below the liquid refrigerant L from the oil return hole 24a. The inside of the discharge pipe 25 rises, and the gas refrigerant containing oil is discharged from the refrigerant outflow hole 23e of the header 23 and returned to the compressor. In addition, the foreign matter contained in the refrigerant reaches the bottom of the body 22 through the same route as the liquid refrigerant and is caught by the strainer 26 to prevent the foreign matter from entering the compressor.

実開昭５７−２３７１号公報Japanese Utility Model Publication No. 57-2371

しかし、上記従来の気液分離器２１においては、ストレーナ２６によって圧縮機への異物の侵入を防止しているが、長時間使用すると、異物によってストレーナ２６が目詰まりするおそれがある。また、ストレーナ２６の目詰まりを発生し難くするため、ストレーナ２６の面積を拡大すると、オイル戻し穴２４ａと底面２２ａ間の距離Ｔが長くなり、胴体２２の底部に溜まったオイルの液面高さが低い場合には、オイルがオイル戻し穴２４ａから吸引され難くなり、オイルを圧縮機に戻すことが困難になるおそれがある。   However, in the conventional gas-liquid separator 21, the strainer 26 prevents foreign matter from entering the compressor. However, when used for a long time, the strainer 26 may be clogged by the foreign matter. Further, when the area of the strainer 26 is increased in order to make the strainer 26 less likely to be clogged, the distance T between the oil return hole 24 a and the bottom surface 22 a becomes longer, and the liquid level of the oil accumulated at the bottom of the body 22 is increased. Is low, it is difficult for the oil to be sucked from the oil return hole 24a, and it may be difficult to return the oil to the compressor.

そこで、本発明は、上記従来の気液分離器における問題点に鑑みてなされたものであって、異物によるストレーナの目詰まりを効果的に防止すると共に、オイルを確実に圧縮機に戻すことができる気液分離器を提供することを目的とする。   Therefore, the present invention has been made in view of the above problems in the conventional gas-liquid separator, and can effectively prevent clogging of the strainer due to foreign matters and reliably return the oil to the compressor. An object of the present invention is to provide a gas-liquid separator that can be used.

上記目的を達成するため、本発明は、気液分離器であって、一端が開口した筒状の胴体と、該胴体の前記開口端を封止し、冷媒流入孔及び冷媒流出孔が穿設されたヘッダと、前記胴体の内部において、一端が前記冷媒流出孔に接続されると共に、他端が前記胴体の底部近傍に位置する冷媒吐出管と、該冷媒吐出管を囲繞し、前記ヘッダ側の端部が開口すると共に、前記胴体の底部側の端部にオイル戻し穴が形成された冷媒吸込管と、該冷媒吸込管に形成されたオイル戻し穴と、前記胴体の内部との間に介在するストレーナとを備え、前記冷媒吸込管の前記胴体底部側端部は、前記ストレーナに囲繞されながら前記胴体底部側に突出し、その先端部に前記オイル戻し穴が形成されることを特徴とする。   In order to achieve the above object, the present invention provides a gas-liquid separator, wherein a cylindrical body having one end opened, the opening end of the body being sealed, and a refrigerant inflow hole and a refrigerant outflow hole are formed. An inner end of the fuselage, and one end of which is connected to the refrigerant outflow hole and the other end is located near the bottom of the fuselage, and surrounds the refrigerant discharge tube, Between the refrigerant suction pipe in which an oil return hole is formed at the end on the bottom side of the fuselage, the oil return hole formed in the refrigerant suction pipe, and the inside of the fuselage. The fuselage bottom side end of the refrigerant suction pipe protrudes toward the fuselage bottom while being surrounded by the strainer, and the oil return hole is formed at the tip. .

そして、本発明によれば、冷媒吸込管の前記胴体底部側端部をストレーナに囲繞されるようにして胴体底部側に突出させ、その先端部にオイル戻し穴を形成したため、胴体内のオイルの液面高さが比較的低い場合でも、オイルを確実に圧縮機に戻すことができると共に、ストレーナの表面積を広くすることができ、異物によるストレーナの目詰まりを効果的に防止することができる。   And according to the present invention, the fuselage bottom side end of the refrigerant suction pipe is projected to the fuselage bottom side so as to be surrounded by the strainer, and the oil return hole is formed at the tip thereof, so that the oil in the fuselage Even when the liquid level is relatively low, the oil can be reliably returned to the compressor, the surface area of the strainer can be increased, and the strainer can be effectively prevented from being clogged.

上記気液分離器において、前記オイル戻し穴は、前記冷媒吸込管の端部を絞り加工することにより形成することができる。   In the gas-liquid separator, the oil return hole can be formed by drawing an end portion of the refrigerant suction pipe.

以上のように、本発明によれば、異物によるストレーナの目詰まりを効果的に防止すると共に、オイルを確実に圧縮機に戻すことが可能な気液分離器を提供することができる。   As described above, according to the present invention, it is possible to provide a gas-liquid separator that can effectively prevent clogging of the strainer due to foreign matters and can reliably return oil to the compressor.

本発明にかかる気液分離器の第１の実施形態を示す図であって、（ａ）は断面図、（ｂ）は（ａ）のストレーナ及びその近傍の拡大図である。It is a figure which shows 1st Embodiment of the gas-liquid separator concerning this invention, Comprising: (a) is sectional drawing, (b) is a strainer of (a), and the enlarged view of the vicinity. 本発明にかかる気液分離器の第２の実施形態を示す図であって、図１（ｂ）に相当する断面図である。It is a figure which shows 2nd Embodiment of the gas-liquid separator concerning this invention, Comprising: It is sectional drawing equivalent to FIG.1 (b). 従来の気液分離器の一例を示す図であって、（ａ）は断面図、（ｂ）は（ａ）のストレーナ及びその近傍の拡大図である。It is a figure which shows an example of the conventional gas-liquid separator, Comprising: (a) is sectional drawing, (b) is a strainer of (a), and the enlarged view of the vicinity.

次に、本発明を実施するための形態について、図面を参照しながら詳細に説明する。   Next, an embodiment for carrying out the present invention will be described in detail with reference to the drawings.

図１は、本発明にかかる気液分離器の第１の実施形態を示し、この気液分離器１は、有底筒状の胴体２と、この胴体２の開口端を封止するヘッダ３と、胴体２の内部に配置された筒状の冷媒吐出管５と、冷媒吐出管５を囲繞する冷媒吸込管４と、冷媒吸込管４の下端部に形成されたオイル戻し穴４ａを囲繞するように胴体２の底面２ａ上に配置されたストレーナ６と、下方に開口するカップ状の気液分離部材７等で構成される。   FIG. 1 shows a first embodiment of a gas-liquid separator according to the present invention. This gas-liquid separator 1 includes a bottomed cylindrical body 2 and a header 3 that seals the open end of the body 2. And a cylindrical refrigerant discharge pipe 5 disposed inside the body 2, a refrigerant suction pipe 4 surrounding the refrigerant discharge pipe 5, and an oil return hole 4 a formed at the lower end of the refrigerant suction pipe 4. In this way, the strainer 6 is disposed on the bottom surface 2a of the body 2 and the cup-shaped gas-liquid separation member 7 is opened downward.

胴体２は、アルミニウム合金等の金属からなり、有底円筒状で上部が開口する瓶状に形成される。上述のように、胴体２の上部開口はヘッダ３によって封止され、胴体２の内部には、冷媒吸込管４、冷媒吐出管５、ストレーナ６及び気液分離部材７が収容される。   The body 2 is made of a metal such as an aluminum alloy, and is formed in a bottle shape having a bottomed cylindrical shape with an upper portion opened. As described above, the upper opening of the body 2 is sealed by the header 3, and the refrigerant suction pipe 4, the refrigerant discharge pipe 5, the strainer 6, and the gas-liquid separation member 7 are accommodated in the body 2.

ヘッダ３は、アルミニウム合金等の金属からなり、円板状の基部３ａと、基部３ａから上方へ突出する上部３ｂと、基部３ａから下方に突出する円筒状の下部３ｃとで構成され、これらを冷媒流入孔３ｄ及び冷媒流出孔３ｅが上下方向に貫通する。上部３ｂの上面には、冷媒流入孔３ｄ及び冷媒流出孔３ｅと嵌合する配管をヘッダ３に装着するための雌ねじ部（不図示）が螺設される。   The header 3 is made of a metal such as an aluminum alloy, and includes a disc-shaped base 3a, an upper part 3b protruding upward from the base 3a, and a cylindrical lower part 3c protruding downward from the base 3a. The refrigerant inflow hole 3d and the refrigerant outflow hole 3e penetrate vertically. On the upper surface of the upper portion 3b, a female screw portion (not shown) for attaching a pipe that fits the refrigerant inflow hole 3d and the refrigerant outflow hole 3e to the header 3 is screwed.

冷媒吐出管５は、アルミニウム合金等の金属からなり、冷媒吐出管４の内部に軸線方向に延設されたリブ等（不図示）によって冷媒吸込管４内に圧入固定される。冷媒吐出管５の上端部５aが冷媒流出孔３ｅの下部にかしめ等によって固定される。   The refrigerant discharge pipe 5 is made of a metal such as an aluminum alloy, and is press-fitted and fixed in the refrigerant suction pipe 4 by a rib or the like (not shown) extending in the axial direction inside the refrigerant discharge pipe 4. The upper end portion 5a of the refrigerant discharge pipe 5 is fixed to the lower portion of the refrigerant outflow hole 3e by caulking or the like.

冷媒吸込管４は、冷媒吐出管５を囲繞し、上端部が開口すると共に、下端部にオイル戻し穴４ａが形成される。この冷媒吸込管４の下端部は、ストレーナ６に囲繞されながら下方に突出し、その先端部にオイル戻し穴４ａが絞り加工により形成されている。   The refrigerant suction pipe 4 surrounds the refrigerant discharge pipe 5, has an upper end opened, and an oil return hole 4a formed at the lower end. A lower end portion of the refrigerant suction pipe 4 protrudes downward while being surrounded by the strainer 6, and an oil return hole 4 a is formed at the front end portion thereof by drawing.

ストレーナ６は、冷媒吸込管４の下端部及びオイル戻し穴４ａを囲繞するように胴体２の底面２ａ上に固定される。   The strainer 6 is fixed on the bottom surface 2a of the body 2 so as to surround the lower end portion of the refrigerant suction pipe 4 and the oil return hole 4a.

ここで、図１（ｂ）に示すように、オイル戻し穴４ａを、図３に示した従来の気液分離器２１と同様に、底面２ａから高さＴの位置に形成すると、図３のストレーナ２６に比較してストレーナ６の表面積を広くすることができることが判る。これが本発明の特徴部分であって、胴体２の内部のオイルの液面高さが比較的低い場合でも、オイルを確実に圧縮機に戻すことができると共に、ストレーナ６の表面積を広くした分、冷媒中の異物によるストレーナ６の目詰まりを効果的に防止することができる。   Here, as shown in FIG. 1B, when the oil return hole 4a is formed at a height T from the bottom surface 2a as in the conventional gas-liquid separator 21 shown in FIG. It can be seen that the surface area of the strainer 6 can be increased compared to the strainer 26. This is a characteristic part of the present invention, and even when the oil level in the body 2 is relatively low, the oil can be reliably returned to the compressor, and the surface area of the strainer 6 is increased. Clogging of the strainer 6 due to foreign matter in the refrigerant can be effectively prevented.

気液分離部材７は、アルミニウム合金等の金属からなり、ヘッダ３の下方において下部３ｃに固着され、上面に上方に突出する突起部７ａを備える。   The gas-liquid separation member 7 is made of a metal such as an aluminum alloy, and is provided with a protrusion 7 a that is fixed to the lower portion 3 c below the header 3 and protrudes upward on the upper surface.

次に、上記構成を有する気液分離器１の動作について、図１を参照しながら説明する。なお、以下の説明においては、気液分離器１を冷凍サイクルの蒸発器と圧縮機との間に配置し、蒸発器からの冷媒を液冷媒とガス冷媒とに分離し、液冷媒を気液分離器１内に貯留し、ガス冷媒を圧縮機へ戻す場合（所謂アキュムレータ）を例にとって説明する。   Next, operation | movement of the gas-liquid separator 1 which has the said structure is demonstrated, referring FIG. In the following description, the gas-liquid separator 1 is disposed between the evaporator and the compressor of the refrigeration cycle, the refrigerant from the evaporator is separated into liquid refrigerant and gas refrigerant, and the liquid refrigerant is gas-liquid. A case where the gas refrigerant is stored in the separator 1 and the gas refrigerant is returned to the compressor (so-called accumulator) will be described as an example.

蒸発器からの冷媒は、図１のヘッダ３の冷媒流入孔３ｄから胴体２の内部に流入した後、気液分離部材７に衝突して気液分離される。この際、気液分離部材７に突起部７ａが設けられているため、冷媒は放射状に整流されて、滑らかに気液分離部材７の上面及び側面を移動し、気液分離部材７の上面で滞留することがなく、圧損も小さく抑えることができる。   The refrigerant from the evaporator flows into the body 2 from the refrigerant inflow hole 3d of the header 3 in FIG. 1, and then collides with the gas-liquid separation member 7 to be gas-liquid separated. At this time, since the gas-liquid separation member 7 is provided with the protrusions 7 a, the refrigerant is rectified radially and smoothly moves on the upper and side surfaces of the gas-liquid separation member 7. There is no stagnation and the pressure loss can be kept small.

気液分離部材７によって分離された液冷媒、及び冷媒中に含まれていたオイルは、そのまま直進下降して胴体２の内部に貯留される。その後、液冷媒Ｌとオイルとの分離が進み、オイルは液冷媒Ｌの下方に溜まる。   The liquid refrigerant separated by the gas-liquid separation member 7 and the oil contained in the refrigerant move straight down as they are and are stored in the body 2. Thereafter, separation between the liquid refrigerant L and the oil proceeds, and the oil accumulates below the liquid refrigerant L.

一方、ガス冷媒は、胴体２の内部の液冷媒Ｌに合流する前に上方へ移動し、冷媒吸込管４の上部開口から冷媒吸込管４の内部に進入し、冷媒吸込管４の内周面と冷媒吐出管５の外周面との間を下降した後、一旦冷媒吸込管４の下端部に達し、オイル戻し穴４ａから液冷媒Ｌの下方に溜まったオイルを吸引しながら上方へ折り返して冷媒吐出管５の内部を上昇し、ヘッダ３の冷媒流出孔３ｅからオイルを含んだガス冷媒が排出され、圧縮機へ戻される。また、冷媒に含まれていた異物は、上記液冷媒と同様のルートにて胴体２の底部に達し、ストレーナ６によって捉えられる。   On the other hand, the gas refrigerant moves upward before joining the liquid refrigerant L inside the body 2, enters the refrigerant suction pipe 4 from the upper opening of the refrigerant suction pipe 4, and the inner peripheral surface of the refrigerant suction pipe 4. And the outer peripheral surface of the refrigerant discharge pipe 5, then reaches the lower end of the refrigerant suction pipe 4, and then turns upward while sucking oil accumulated below the liquid refrigerant L from the oil return hole 4 a. The inside of the discharge pipe 5 rises, and the gas refrigerant containing oil is discharged from the refrigerant outflow hole 3e of the header 3 and returned to the compressor. Further, the foreign matter contained in the refrigerant reaches the bottom of the body 2 through the same route as the liquid refrigerant and is captured by the strainer 6.

次に、本発明にかかる気液分離器の第２の実施形態について、図２を参照しながら説明する。   Next, a second embodiment of the gas-liquid separator according to the present invention will be described with reference to FIG.

この気液分離器１１は、図１に示した気液分離器１の冷媒吸込管４及びストレーナ６とは異なる形状を有する冷媒吸込管１４及びストレーナ１６を備え、他の構成要素は、気液分離器１と同様である。   The gas-liquid separator 11 includes a refrigerant suction pipe 14 and a strainer 16 having shapes different from those of the refrigerant suction pipe 4 and the strainer 6 of the gas-liquid separator 1 shown in FIG. The same as the separator 1.

冷媒吸込管１４は、冷媒吐出管５を囲繞し、上端部１４ａが冷媒吸込管４と同様に開口する。冷媒吸込管１４の下端部は、縦断面が円錐状に形成され、外表面がストレーナ１６に囲繞され、先端部にオイル戻し穴１４ａが形成されている。   The refrigerant suction pipe 14 surrounds the refrigerant discharge pipe 5, and the upper end portion 14 a opens similarly to the refrigerant suction pipe 4. A lower end portion of the refrigerant suction pipe 14 has a conical shape in the longitudinal section, an outer surface is surrounded by the strainer 16, and an oil return hole 14a is formed at the tip end portion.

ストレーナ１６は、冷媒吸込管１４の下端部及びオイル戻し穴１４ａを囲繞するように胴体２の底面２ａ上に固定される。   The strainer 16 is fixed on the bottom surface 2a of the body 2 so as to surround the lower end portion of the refrigerant suction pipe 14 and the oil return hole 14a.

上記のような構成によっても、オイル戻し穴１４ａを、図３に示した従来の気液分離器２１と同様に、底面２ａから高さＴの位置に形成すると、図３のストレーナ２６に比較してストレーナ１６の表面積を広くすることができ、胴体２の内部のオイルの液面高さが比較的低い場合でも、オイルを確実に圧縮機に戻すことができると共に、ストレーナ１６の表面積を広くした分、冷媒中の異物によるストレーナ１６の目詰まりを効果的に防止することができる。   Even with the above configuration, when the oil return hole 14a is formed at a height T from the bottom surface 2a as in the conventional gas-liquid separator 21 shown in FIG. 3, it is compared with the strainer 26 of FIG. The surface area of the strainer 16 can be increased, and even when the oil level inside the fuselage 2 is relatively low, the oil can be reliably returned to the compressor and the surface area of the strainer 16 is increased. Therefore, clogging of the strainer 16 due to foreign matters in the refrigerant can be effectively prevented.

なお、冷媒吸込管及びストレーナの形状は、図１及び図２に示すものに限らず、冷媒吸込管の下方端部をストレーナに囲繞された状態で下方に突出させ、その先端部にオイル戻し穴を形成したものであれば、いかなる形状のものであってもよい。   The shapes of the refrigerant suction pipe and the strainer are not limited to those shown in FIGS. 1 and 2, and the lower end of the refrigerant suction pipe is projected downward in a state surrounded by the strainer, and an oil return hole is formed at the tip thereof. Any shape may be used as long as it is formed.

１ 気液分離器
２ 胴体
２ａ 底面
３ ヘッダ
３ａ 基部
３ｂ 上部
３ｃ 下部
３ｄ 冷媒流入孔
３ｅ 冷媒流出孔
４ 冷媒吸込管
４ａ オイル戻し穴
５ 冷媒吐出管
５ａ 上端部
６ ストレーナ
７ 気液分離部材
７ａ 突起部
１１ 気液分離器
１４ 冷媒吸込管
１４ａ オイル戻し穴
１６ ストレーナ DESCRIPTION OF SYMBOLS 1 Gas-liquid separator 2 Body 2a Bottom surface 3 Header 3a Base part 3b Upper part 3c Lower part 3d Refrigerant inflow hole 3e Refrigerant outflow hole 4 Refrigerant suction pipe 4a Oil return hole 5 Refrigerant discharge pipe 5a Upper end part 6 Strainer 7 Gas-liquid separation member 7a Protrusion part 11 Gas-liquid separator 14 Refrigerant suction pipe 14a Oil return hole 16 Strainer

Claims (2)

一端が開口した筒状の胴体と、
該胴体の前記開口端を封止し、冷媒流入孔及び冷媒流出孔が穿設されたヘッダと、
前記胴体の内部において、一端が前記冷媒流出孔に接続されると共に、他端が前記胴体の底部近傍に位置する冷媒吐出管と、
該冷媒吐出管を囲繞し、前記ヘッダ側の端部が開口すると共に、前記胴体の底部側の端部にオイル戻し穴が形成された冷媒吸込管と、
該冷媒吸込管に形成されたオイル戻し穴と、前記胴体の内部との間に介在するストレーナとを備え、
前記冷媒吸込管の前記胴体底部側端部は、前記ストレーナに囲繞されながら前記胴体底部側に突出し、その先端部に前記オイル戻し穴が形成されることを特徴とする気液分離器。 A cylindrical body with one end open;
A header that seals the open end of the body and has a coolant inflow hole and a coolant outflow hole;
Inside the fuselage, one end is connected to the refrigerant outflow hole, and the other end is located near the bottom of the fuselage, a refrigerant discharge pipe,
A refrigerant suction pipe that surrounds the refrigerant discharge pipe, has an end on the header side, and has an oil return hole formed on an end on the bottom side of the body;
A strainer interposed between the oil return hole formed in the refrigerant suction pipe and the inside of the fuselage,
The body bottom side end of the refrigerant suction pipe protrudes toward the body bottom while being surrounded by the strainer, and the oil return hole is formed at the tip of the gas / liquid separator. 前記オイル戻し穴は、前記冷媒吸込管の端部を絞り加工することにより形成されたことを特徴とする請求項１に記載の気液分離器。   The gas-liquid separator according to claim 1, wherein the oil return hole is formed by drawing an end portion of the refrigerant suction pipe.
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