JP2010151393A

JP2010151393A - Accumulator

Info

Publication number: JP2010151393A
Application number: JP2008331322A
Authority: JP
Inventors: Shinnosuke Maeta; 信之介前多
Original assignee: Calsonic Kansei Corp
Current assignee: Marelli Corp
Priority date: 2008-12-25
Filing date: 2008-12-25
Publication date: 2010-07-08

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accumulator free from vibration of a suction pipe due to impact shock and the like. <P>SOLUTION: A female screw 17a is formed on a peripheral wall face near an upper end of a container body 17, a male screw 18c engaged with the female screw 17a is formed on an outer peripheral wall face near a lower end of a top wall section 18g of a head section 18, a double pipe 20 is disposed in the container body 17, and the double pipe 20 is held and a discharge opening of the double pipe 20 is communicated with a refrigerant outflow pathway 18b, by fastening the container body 17 and the head section 18. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、例えば、二酸化炭素（ＣＯ_２）を冷媒とした超臨界冷凍サイクルに用いられるアキュムレータに関する。 The present invention relates to an accumulator used in a supercritical refrigeration cycle using carbon dioxide (CO ₂ ) as a refrigerant, for example.

従来、冷凍装置用のアキュムレータが知られている（例えば、特許文献１，２参照）。 Conventionally, accumulators for refrigeration apparatuses are known (see, for example, Patent Documents 1 and 2).

この特許文献１のアキュムレータ１は、図９に示すように、密閉されたアキュムレータ容器本体１ａと、蒸発器から気液混合冷媒と潤滑油をアキュムレータ容器本体１ａ内に取り込むための入口管１ｂと、取り込んだ気液混合冷媒を気液分離して気冷媒と潤滑油を圧縮機へ送るためのＵ字状の出口管１ｃを備えている。また、出口管１ｃの一端側は貫通穴１ｈに嵌入されて出口管１ｃがアキュムレータ１に取り付けられている。 As shown in FIG. 9, the accumulator 1 of Patent Document 1 includes a closed accumulator container main body 1 a, an inlet pipe 1 b for taking a gas-liquid mixed refrigerant and lubricating oil from an evaporator into the accumulator container main body 1 a, A U-shaped outlet pipe 1c is provided for gas-liquid separation of the taken gas-liquid mixed refrigerant and sending the gas refrigerant and lubricating oil to the compressor. Further, one end side of the outlet pipe 1c is fitted into the through hole 1h, and the outlet pipe 1c is attached to the accumulator 1.

特許文献２のアキュムレータは、上端が開口したタンク本体およびこの上端開口を閉塞するヘッダーとからなるタンクと、タンク本体の底壁に固定されたホルダ等とを備えている。このヘッダーには、冷媒流入口と冷媒流出口が形成されている。また、タンク本体内には、気冷媒を取り込む吸い込みパイプが設けられている。この吸い込みパイプは、小径の内管と大径の外管からなる２重管で、内管の上端はヘッダーの下面に固定され、外管の下端は前記ホルダに保持されている。
実公平５−３９４０９号公報特開２００８−３２２７０号公報 The accumulator of Patent Document 2 includes a tank including a tank body having an upper end opened and a header that closes the upper end opening, a holder fixed to the bottom wall of the tank body, and the like. The header is formed with a refrigerant inlet and a refrigerant outlet. A suction pipe for taking in the gas refrigerant is provided in the tank body. The suction pipe is a double pipe composed of a small-diameter inner pipe and a large-diameter outer pipe. The upper end of the inner pipe is fixed to the lower surface of the header, and the lower end of the outer pipe is held by the holder.
Japanese Utility Model Publication No. 5-39409 JP 2008-32270 A

しかしながら、前者の特許文献１のアキュムレータ１にあっては、出口管１ｃの一端側だけが貫通穴１ｈに固定されているため、アキュムレータ容器本体１ａに衝撃が加わったりすると出口管１ｃが振動してしまう虞があり、好ましいものではなかった。 However, in the former accumulator 1 of Patent Document 1, since only one end side of the outlet pipe 1c is fixed to the through hole 1h, the outlet pipe 1c vibrates when an impact is applied to the accumulator container main body 1a. This is not preferable.

また、パイプをＵ字状に曲げて出口管１ｃとして用いているため、出口管１ｃを収容するためには容器本体の直径が大きくなってしまう。 Further, since the pipe is bent into a U shape and used as the outlet pipe 1c, the diameter of the container main body is increased to accommodate the outlet pipe 1c.

後者の特許文献２のアキュムレータにあっては、２重管の内管と外管は一体ではなく、また内管の上端だけが固定され、外管の下端だけが固定されているため、タンクに衝撃が加わったりすると２重管が振動してしまう虞があり、好ましいものではなかった。 In the latter accumulator of Patent Document 2, the inner pipe and the outer pipe of the double pipe are not integrated, only the upper end of the inner pipe is fixed, and only the lower end of the outer pipe is fixed. If an impact is applied, the double tube may vibrate, which is not preferable.

本発明は、上記問題に着目してなされたもので、衝撃などによって吸込管が振動してしまうことがないアキュムレータを提供することを目的とする。 The present invention has been made paying attention to the above problem, and an object of the present invention is to provide an accumulator in which a suction pipe does not vibrate due to an impact or the like.

上記目的を達成するため、本発明では、上部に開口部を有し冷媒および潤滑油を貯留するための容器本体と、下端が開口するとともに前記冷媒および潤滑油を流入させるための流入口および前記冷媒のうち気相の冷媒を流出させるための流出口が形成され前記容器本体の開口部を塞ぐヘッド部と、
前記容器本体の潤滑油を取り込む潤滑油取込孔、前記容器本体の冷媒のうち気相の冷媒を取り込む気冷媒取込孔およびこの取り込んだ気相の冷媒および潤滑油を吐き出すための吐出孔を有して前記容器本体内に配置される吸込管とを備えたアキュムレータであって、
前記容器本体の開口部に前記ヘッド部を締結し、
この締結により、前記容器本体の底部とヘッド部とで前記吸込管を挟持するとともに前記吸込管の吐出孔を前記ヘッド部の流出口に連通させたことを特徴とする。 In order to achieve the above object, in the present invention, a container body having an opening in the upper part for storing refrigerant and lubricating oil, a lower end opening and an inlet for allowing the refrigerant and lubricating oil to flow in and A head portion that is formed with an outlet for flowing out the gas phase refrigerant out of the refrigerant and closes the opening of the container body;
A lubricating oil intake hole for taking in the lubricating oil in the container body, a gas refrigerant taking hole for taking in the gas phase refrigerant out of the refrigerant in the container body, and a discharge hole for discharging the taken in gas phase refrigerant and lubricating oil. An accumulator comprising a suction pipe disposed in the container body,
Fasten the head to the opening of the container body,
By this fastening, the suction pipe is sandwiched between the bottom part of the container body and the head part, and the discharge hole of the suction pipe is communicated with the outlet of the head part.

本発明によれば、容器本体に衝撃が加わっても吸込管が振動してしまうことを防止することができる。 According to the present invention, it is possible to prevent the suction pipe from vibrating even when an impact is applied to the container body.

本実施例のアキュムレータは、例えば、ＣＯ_２冷凍サイクル（超臨界冷凍サイクル）用のアキュムレータである。 The accumulator of the present embodiment is, for example, an accumulator for a CO ₂ refrigeration cycle (supercritical refrigeration cycle).

近年、環境にあまり負荷をかけないＣＯ_２を冷媒に用いたＣＯ_２冷凍サイクルによる冷却システムの開発が進められている。 In recent years, the development of a cooling system using a CO ₂ refrigeration cycle using CO ₂ as a refrigerant, which does not place much load on the environment, has been promoted.

二酸化炭素ＣＯ_２は、臨界温度（圧縮してもそれ以下の温度でなければ液体にできない境界温度）が３１．１℃と低く、このＣＯ_２を冷媒とするＣＯ_２冷凍サイクルにおいて高圧側では冷媒圧力をＣＯ_２の臨界圧（７．４ＭＰａ）を超えるように設定することで冷媒を高温高圧の超臨界状態として、超臨界冷凍サイクルにおいて高温となる高圧側を設け、この超臨界冷凍サイクルにおいて低温度となる低圧側との熱交換に利用する。このようにＣＯ_２臨界圧を超えるように冷媒圧力を設定するため、ＣＯ_２冷凍サイクルは超臨界冷凍サイクルと呼ばれる。 Carbon dioxide CO ₂ has a low critical temperature (boundary temperature that cannot be converted into a liquid unless compressed to a temperature below it) as low as 31.1 ° C., and in the CO ₂ refrigeration cycle using this CO ₂ as a refrigerant, it is a refrigerant on the high pressure side. By setting the pressure to exceed the critical pressure of CO ₂ (7.4 MPa), the refrigerant is placed in a supercritical state of high temperature and high pressure, and a high pressure side that is high in the supercritical refrigeration cycle is provided. It is used for heat exchange with the low-pressure side that is the temperature. Since the refrigerant pressure is set to exceed the CO ₂ critical pressure in this way, the CO ₂ refrigeration cycle is called a supercritical refrigeration cycle.

ＣＯ_２冷凍サイクル１００を循環するＣＯ_２が飽和した高圧のガス冷媒は、従来のフロン類（代替フロン）の冷媒に比べて約７倍の密度であり、フロン類（代替フロン）の約１．２倍の蒸発潜熱（単位質量あたり）であるので、単位体積当たりの冷房能力（蒸発潜熱×気体密度）は、約８倍となる。このため、コンプレッサの吐き出し容量は、１５〜３０ｃｃ程度で十分性能が発揮できる。 The high-pressure gas refrigerant saturated with CO ₂ that circulates in the CO ₂ refrigeration cycle 100 has a density about 7 times that of conventional refrigerants of chlorofluorocarbons (alternative chlorofluorocarbons). Since it is twice the latent heat of vaporization (per unit mass), the cooling capacity per unit volume (latent heat of vaporization x gas density) is about eight times. For this reason, if the discharge capacity of the compressor is about 15 to 30 cc, sufficient performance can be exhibited.

以下、本発明のアキュムレータを実現する最良の形態を、図面に示す実施例１乃至実施例３に基づいて説明する。 Hereinafter, the best mode for realizing an accumulator of the present invention will be described based on Examples 1 to 3 shown in the drawings.

図１は、実施例のアキュムレータが適用された車両用空調装置のＣＯ_２冷凍サイクル（超臨界冷凍サイクル用）１００を示すサイクルシステム図である。図２は、図１のエバポレータ１３を示す平面図である。 FIG. 1 is a cycle system diagram showing a CO ₂ refrigeration cycle (for a supercritical refrigeration cycle) 100 of a vehicle air conditioner to which an accumulator of an embodiment is applied. FIG. 2 is a plan view showing the evaporator 13 of FIG.

自然冷媒であるＣＯ_２冷媒を用いたＣＯ_２冷凍サイクル１００は、図１に示すように、コンプレッサ１０と、ガスクーラ１１と、膨張弁１２と、エバポレータ１３と、アキュムレータ１５をこの順で環状に金属管で接続して構成される。また、ＣＯ_２冷凍サイクル１００は内部熱交換器１６を有している。 CO ₂ refrigeration cycle 100 using the CO ₂ refrigerant is a natural refrigerant, as shown in FIG. 1, a compressor 10, a gas cooler 11, an expansion valve 12, the metal and the evaporator 13, the accumulator 15 annularly in this order Connected with a tube. The CO ₂ refrigeration cycle 100 has an internal heat exchanger 16.

ガスクーラ１１は、車両の前面に配置されていてコンプレッサ１０からの高温・高圧のガス冷媒を外気と熱交換し、中温・高圧のガス冷媒とする熱交換器である。 The gas cooler 11 is a heat exchanger that is disposed on the front surface of the vehicle and exchanges heat between the high-temperature and high-pressure gas refrigerant from the compressor 10 with the outside air to obtain a medium-temperature and high-pressure gas refrigerant.

膨張弁１２は、エンジンルーム内に設置され、ガスクーラ１１からの中温・高圧のガス冷媒を減圧し低温・低圧の液ガス混合冷媒にする。この膨張弁１２は、ガスクーラ１１出口の冷媒温度および冷媒圧力に基づいて、最大の冷房性能を保持するように弁の開度を制御する。 The expansion valve 12 is installed in the engine room and depressurizes the medium / high pressure gas refrigerant from the gas cooler 11 to form a low temperature / low pressure liquid / gas mixed refrigerant. The expansion valve 12 controls the opening degree of the valve so as to maintain the maximum cooling performance based on the refrigerant temperature and refrigerant pressure at the outlet of the gas cooler 11.

エバポレータ１３は、車室内の空調を行う車両用空調装置１４内（図示せず）に、送風機等と共に配置される熱交換器である。膨張弁１２からの低温・低圧の液ガス混合冷媒を循環させることで周囲の空気から熱を奪い、冷媒温度を高めてガス化を促進する（図２参照）。 The evaporator 13 is a heat exchanger that is arranged together with a blower or the like in a vehicle air conditioner 14 (not shown) that performs air conditioning of the vehicle interior. By circulating the low-temperature / low-pressure liquid-gas mixed refrigerant from the expansion valve 12, heat is taken from the surrounding air, and the refrigerant temperature is increased to promote gasification (see FIG. 2).

アキュムレータ１５は、エバポレータ１３から導入される液ガス混合冷媒から気液分離（液冷媒とガス冷媒とに分離）し、ガス冷媒をコンプレッサ１０に供給し、ＣＯ_２冷凍サイクル１００中の余剰液冷媒を本体内部に貯留し、ＣＯ_２冷凍サイクル１００の冷媒適正量を管理する。 The accumulator 15 performs gas-liquid separation (separated into liquid refrigerant and gas refrigerant) from the liquid-gas mixed refrigerant introduced from the evaporator 13, supplies the gas refrigerant to the compressor 10, and removes excess liquid refrigerant in the CO ₂ refrigeration cycle 100. The refrigerant is stored inside the main body, and the appropriate amount of refrigerant in the CO ₂ refrigeration cycle 100 is managed.

内部熱交換器１６は、ガスクーラ１１を出た中温高圧の冷媒とアキュムレータ１５を出た低温低圧の冷媒との間で熱交換する。 The internal heat exchanger 16 exchanges heat between the medium-temperature and high-pressure refrigerant exiting the gas cooler 11 and the low-temperature and low-pressure refrigerant exiting the accumulator 15.

この内部熱交換器１６により、膨張弁１２の入口における冷媒温度をさらに下げて、ＣＯ_２冷凍サイクル１００の成績係数（ＣＯＰ、ＣｏｅｆｆｉｃｉｅｎｔｏｆＰｅｒｆｏｒｍａｎｃｅ）を向上させる。 By this internal heat exchanger 16, the refrigerant temperature at the inlet of the expansion valve 12 is further lowered to improve the coefficient of performance (COP) of the CO ₂ refrigeration cycle 100.

図３は、実施例１のアキュムレータ１５の全体構成を示す垂直縦断面図である。図４（ａ）は、アキュムレータ１５の２重管（吸込管）２０を示す斜視図である。図４（ｂ）は、２重管２０の部分断面図である。図４（ｃ）は、アキュムレータ１５のオイルブリーダ２３を示す斜視図である。 FIG. 3 is a vertical longitudinal sectional view showing the overall configuration of the accumulator 15 according to the first embodiment. FIG. 4A is a perspective view showing a double pipe (suction pipe) 20 of the accumulator 15. FIG. 4B is a partial cross-sectional view of the double tube 20. FIG. 4C is a perspective view showing the oil bleeder 23 of the accumulator 15.

アキュムレータ１５は、図３に示すように、上部に口部１７Ａを有する円筒状の容器本体１７と、その口部１７Ａに取り付けられたヘッド部１８と、気液分離された冷媒のうち気冷媒を取り込むための２重管２０と、２重管２０の上端の開口を塞ぐ蓋部材１９と、２重管２０の下端に取り付けられるオイルブリーダ２３等とを有している。 As shown in FIG. 3, the accumulator 15 includes a cylindrical container body 17 having a mouth portion 17A at the upper portion, a head portion 18 attached to the mouth portion 17A, and a gas refrigerant out of the gas-liquid separated refrigerant. It has a double pipe 20 for taking in, a lid member 19 that closes the opening at the upper end of the double pipe 20, and an oil bleeder 23 attached to the lower end of the double pipe 20.

容器本体１７は、潤滑油と液冷媒を貯留するためのもので、容器本体１７の口部１７Ａの内周壁面には、周方向に沿って雌ネジ１７ａが切られている。そして、容器本体１７とヘッド部１８は溶接により固定されている。このようにネジを切るのは、この固定を締結により、さらに強固にするためである。また、この容器本体１７には、液冷媒と潤滑油が比重の違いから上層と下層とに２層に分かれた状態で貯留される（一部不図示）。 The container main body 17 is for storing lubricating oil and liquid refrigerant, and a female screw 17a is cut along the circumferential direction on the inner peripheral wall surface of the mouth portion 17A of the container main body 17. And the container main body 17 and the head part 18 are being fixed by welding. The reason for cutting the screw in this way is to further strengthen the fixing by fastening. Further, the liquid refrigerant and the lubricating oil are stored in the container main body 17 in a state of being divided into two layers, an upper layer and a lower layer, due to the difference in specific gravity (partially not shown).

ヘッド部１８は、容器本体１７の口部１７Ａの内径と略同一且つ上下端が開口された円筒部（筒部）１８ｆとこの円筒部１８ｆの上端に一体形成されこの上端開口を閉塞する頂壁部１８ｇを有している。 The head portion 18 has a cylindrical portion (cylindrical portion) 18f that is substantially the same as the inner diameter of the mouth portion 17A of the container body 17 and has upper and lower ends opened, and a top wall that is formed integrally with the upper end of the cylindrical portion 18f and closes the upper end opening. Part 18g.

円筒部１８ｆの下端近傍の外周壁面には雄ネジ１８ｃが切られており、容器本体１７の雌ネジ１７ａに螺合している。この螺合により、容器本体１７とヘッド部１８が締結され、容器本体１７とヘッド部１８を溶接のみでつなぐ場合より強固に固定される。 A male screw 18 c is cut on the outer peripheral wall surface near the lower end of the cylindrical portion 18 f and is screwed into the female screw 17 a of the container body 17. By this screwing, the container main body 17 and the head part 18 are fastened and fixed more firmly than when the container main body 17 and the head part 18 are connected only by welding.

また、この雄ネジ１８ｃより上の円筒部１８ｆの周壁には、側方（図３において左側）に突出する口部１８Ａが形成され、この口部１８Ａの孔が、冷媒流入口（流入口）１８ａ（図３において左側）となっている。この口部１８Ａには、コネクタ２２が装着され、コネクタ２２の孔２２Ａと口部１８Ａの冷媒流入口１８ａとが連通している。 Further, the peripheral wall of the cylindrical portion 18f above the male screw 18c is formed with a mouth portion 18A protruding sideward (left side in FIG. 3), and the hole of the mouth portion 18A serves as a refrigerant inlet (inlet). 18a (left side in FIG. 3). A connector 22 is attached to the opening 18A, and a hole 22A of the connector 22 and a refrigerant inlet 18a of the opening 18A communicate with each other.

この頂壁部１８ｇには冷媒流出通路１８ｂが上下方向に貫通して形成されている。また、この冷媒流出通路１８ｂの上部は径の大きい冷媒流出口１８ｄとなっており、この冷媒流出口１８ｄにコネクタ２１の口部２１ａが嵌入され、コネクタ２１の孔２１Ａとヘッド部の冷媒流出通路１８ｂとが連通している。コネクタ２１，２２のそれぞれには配管された冷媒用の金属管９，８が連結される。 A refrigerant outflow passage 18b is formed in the top wall portion 18g so as to penetrate in the vertical direction. The upper part of the refrigerant outflow passage 18b is a refrigerant outlet 18d having a large diameter, and the opening 21a of the connector 21 is fitted into the refrigerant outlet 18d, so that the hole 21A of the connector 21 and the refrigerant outflow passage of the head portion are inserted. 18b communicates. Connected to each of the connectors 21 and 22 are piped metal tubes 9 and 8 for refrigerant.

このヘッド部１８の頂壁部１８ｇの冷媒流出通路１８ｂは、好ましくは容器本体１７の中心軸線と一致するように形成する。 The refrigerant outflow passage 18b of the top wall portion 18g of the head portion 18 is preferably formed so as to coincide with the central axis of the container body 17.

２重管２０は、図３および図４（ａ）に示すように、外管部（外管）２０ｂとこの外管部２０ｂより長さが短い内管部（内管）２０ａを有している。内管部２０ａの両端の開口面は外管部２０ｂの両端の開口面から没した状態となっている。 As shown in FIGS. 3 and 4A, the double pipe 20 includes an outer pipe part (outer pipe) 20b and an inner pipe part (inner pipe) 20a shorter in length than the outer pipe part 20b. Yes. The opening surfaces at both ends of the inner tube portion 20a are in a state of being submerged from the opening surfaces at both ends of the outer tube portion 20b.

外管部２０ｂと内管部２０ａは、押し出し加工等により成形され、一体形成された連結壁２０ｄによって繋がっている。また、外管部２０ｂの周壁上部には、図４（ａ）および（ｂ）に示すように、気冷媒を取り込むためのスリット（気冷媒取込孔）２０ｃが内側から外側に向かって斜め下方に形成され、外管部２０ｂの外部がスリット２０ｃを介して外管部２０ｂと内管部２０ａとの間の空間に連通している。
また、このスリット２０ｃは、図３に示すように、ヘッド部１８の冷媒流入口１８ａに対して反対側となる外管部２０ｂの周壁部分に形成されている。このように構成されていることにより、冷媒流入口１８ａから流入した冷媒のうち、液冷媒が外管部２０ｂの外壁を流れてきても上記空間に流れ込まないようにしている。
このスリット２０ｃは、液冷媒の液面より高い高さ位置（液冷媒の液面から所定の距離をとった高さ位置）であれば、一つに限らず複数も形成してもよい。 The outer tube portion 20b and the inner tube portion 20a are formed by an extrusion process or the like, and are connected by an integrally formed connecting wall 20d. Further, as shown in FIGS. 4A and 4B, a slit (gas refrigerant intake hole) 20c for taking in the gas refrigerant is obliquely downward from the inner side toward the outer side in the upper portion of the peripheral wall of the outer pipe portion 20b. The outside of the outer tube portion 20b communicates with the space between the outer tube portion 20b and the inner tube portion 20a via the slit 20c.
In addition, as shown in FIG. 3, the slit 20 c is formed in the peripheral wall portion of the outer tube portion 20 b that is opposite to the refrigerant inlet 18 a of the head portion 18. By being configured in this manner, liquid refrigerant from the refrigerant flowing in from the refrigerant inlet 18a is prevented from flowing into the space even if it flows through the outer wall of the outer pipe portion 20b.
The slit 20c is not limited to one and may be formed in a plurality as long as it is a height position higher than the liquid level of the liquid refrigerant (a height position at a predetermined distance from the liquid level of the liquid refrigerant).

この所定の距離は、例えば、ＣＯ_２冷凍サイクル１００が一般車両に搭載された場合、通常の走行による振動で液冷媒の液面が２重管２０の外管部２０ｂを伝って上方に到達することがない高さ位置である。 For example, when the CO ₂ refrigeration cycle 100 is mounted on a general vehicle, the predetermined distance is such that the liquid level of the liquid refrigerant reaches the upper side through the outer pipe portion 20b of the double pipe 20 due to vibration caused by normal traveling. There is no height position.

オイルブリーダ２３は、図３および図４（ｃ）に示すように、一端が閉塞され他端が開口した円筒部２３ｂを有し、この円筒部２３ｂの他端部には径方向外方へ突出したフランジ２３ｄが形成され、このフランジ２３ｄに対して円筒部２３ｂと反対の面に、複数の脚部２３ｃ，２３ｃ，２３ｃが形成されている。円筒部２３ｂの閉塞壁部２３ｅには潤滑油取込孔２３ａが形成されている。 As shown in FIGS. 3 and 4C, the oil bleeder 23 has a cylindrical portion 23b whose one end is closed and the other end is opened, and the other end portion of the cylindrical portion 23b protrudes radially outward. The flange 23d is formed, and a plurality of leg portions 23c, 23c, and 23c are formed on the surface of the flange 23d opposite to the cylindrical portion 23b. A lubricating oil intake hole 23a is formed in the closed wall portion 23e of the cylindrical portion 23b.

この脚部２３ｃ，２３ｃ，２３ｃは、例えば容器本体１７の底壁１７ｂの中央部にロウ接で固定されている。ロウ接に限らず容器本体１７の底壁１７ｂの中央部に脚部２３ｃに係合する係合部を固設してここに脚部２３ｃを係合させて固定しても良い。また、脚部２３ｃを形成せずに、容器本体１７の底壁１７ｂの中央部に筒状部を固設してこの筒状部をオイルブリーダ２３の円筒部２３ｂの他端開口に嵌入させて固定しても良い。 The leg portions 23c, 23c, and 23c are fixed to the central portion of the bottom wall 17b of the container body 17 by brazing, for example. Not only the brazing but also the engaging portion that engages with the leg portion 23c may be fixed at the center of the bottom wall 17b of the container main body 17, and the leg portion 23c may be engaged and fixed here. Further, without forming the leg portion 23 c, a cylindrical portion is fixed to the central portion of the bottom wall 17 b of the container body 17, and this cylindrical portion is fitted into the other end opening of the cylindrical portion 23 b of the oil bleeder 23. It may be fixed.

上述した脚部２３ｃ，２３ｃ，２３ｃはオイルブリーダ２３に設けられているが、２重管２０側にロウ接等して設けてもよい。 The above-described legs 23c, 23c, and 23c are provided on the oil bleeder 23, but may be provided on the double pipe 20 side by brazing or the like.

また、上記したものではヘッド部１８に雄ネジ１８ｃを形成し、容器本体１７に雌ネジ１７ａを形成したが、これに限らずヘッド部１８の円筒部１８ｆ下部の内周壁に雌ネジを形成し、容器本体１７の口部１７Ａの外周壁面に雄ネジを形成して、この口部１７Ａをヘッド部１８の円筒部１８ｆ内に取り付けるようにしても良い。 Further, in the above, the male screw 18c is formed on the head portion 18 and the female screw 17a is formed on the container body 17. However, the present invention is not limited to this, and a female screw is formed on the inner peripheral wall below the cylindrical portion 18f of the head portion 18. Alternatively, a male screw may be formed on the outer peripheral wall surface of the mouth portion 17A of the container body 17, and the mouth portion 17A may be attached within the cylindrical portion 18f of the head portion 18.

オイルブリーダ２３の円筒部２３ｂは、２重管２０の外管部２０ｂの下端開口に嵌入している。この円筒部２３ｂの高さは、外管部２０ｂの下端面から内管部２０ａの下端面までの高さより低く設定されており、円筒部２３ｂの閉塞壁部２３ｅと内管部２０ａの下端面との間に所定の隙間が形成されている、この隙間に拠り外管部２０ｂと内管部２０ａとの間に形成された流路２０ｆと内管部２０ａ内の流路２０ｅとが連通している。 The cylindrical part 23 b of the oil bleeder 23 is fitted into the lower end opening of the outer pipe part 20 b of the double pipe 20. The height of the cylindrical portion 23b is set lower than the height from the lower end surface of the outer tube portion 20b to the lower end surface of the inner tube portion 20a, and the lower end surface of the closed wall portion 23e of the cylindrical portion 23b and the inner tube portion 20a. A predetermined gap is formed between the flow path 20f formed between the outer tube portion 20b and the inner tube portion 20a and the flow channel 20e in the inner tube portion 20a communicating with each other. ing.

また、オイルブリーダ２３は、オイルブリーダ２３の内を流れるガス冷媒の流れを利用して、容器本体１７内底部に溜まった潤滑油を潤滑油取込孔２３ａを介して上記隙間部分へ吸引して取り込むようになっている。
蓋部材１９は、図３に示すように、大径筒部（大径凸部）１９ａとこの大径筒部１９ａの一方の面に一体形成された小径筒部（小径凸部）１９ｂと有し、大径筒部１９ａに対して小径筒部１９ｂと反対側の端部にフランジ１９ｃが形成され、このフランジ１９ｃがヘッド部１８の頂壁部１８ｇの面に固定されている。また、この小径筒部１９ｂの孔１９ｅと大径筒部１９ａの孔１９ｄとが連通されている。 The oil bleeder 23 uses the flow of the gas refrigerant flowing in the oil bleeder 23 to suck the lubricating oil accumulated in the bottom of the container body 17 into the gap through the lubricating oil intake hole 23a. It comes to capture.
As shown in FIG. 3, the lid member 19 has a large-diameter cylindrical portion (large-diameter convex portion) 19a and a small-diameter cylindrical portion (small-diameter convex portion) 19b integrally formed on one surface of the large-diameter cylindrical portion 19a. A flange 19c is formed at the end opposite to the small diameter cylindrical portion 19b with respect to the large diameter cylindrical portion 19a, and the flange 19c is fixed to the surface of the top wall portion 18g of the head portion 18. Further, the hole 19e of the small diameter cylindrical portion 19b and the hole 19d of the large diameter cylindrical portion 19a communicate with each other.

この小径筒部１９ｂは内管部２０ａの上端開口に嵌入しており、この内管部２０ａ内は蓋部材１９の孔１９ｅ，１９ｄを介してヘッド部１８の冷媒流出通路１８ｂに連通している。また、大径筒部１９ａは外管部２０ｂの他端開口に嵌入しており、この嵌入によりこの他端開口が閉塞されている。また、蓋部材１９を用いずにヘッド部１８に開口した冷媒流出口１８ｂを外管部２０ｂの外径と同等にして外管部２０ｂを冷媒流出口１８ｂに直接嵌入するようにしてもよい。 The small diameter cylindrical portion 19b is fitted into the upper end opening of the inner tube portion 20a, and the inner tube portion 20a communicates with the refrigerant outflow passage 18b of the head portion 18 through the holes 19e and 19d of the lid member 19. . The large-diameter cylindrical portion 19a is fitted into the other end opening of the outer tube portion 20b, and the other end opening is closed by this fitting. Further, the refrigerant outlet 18b opened in the head portion 18 without using the lid member 19 may be made equal to the outer diameter of the outer pipe portion 20b so that the outer pipe portion 20b is directly fitted into the refrigerant outlet 18b.

次に、実施例１のアキュムレータ１５の作用を説明する。 Next, the operation of the accumulator 15 according to the first embodiment will be described.

ヘッド部１８の雄ネジ１８ｃと容器本体１７の雌ネジ１７ａとを螺合させてヘッド部１８と容器本体１７を締結することにより、ヘッド部１８の頂壁部１８ｇの下面と容器本体１７の底壁１７ｂとにより２重管２０である内管部２０ａおよび外管部２０ｂを上下から挟持し、この挟持により内管部２０ａおよび外管部２０ｂの上下端部が固定されるため、容器本体１７に衝撃が加えられてもこの衝撃によって内管部２０ａおよび外管部２０ｂが振動してしまうことがない。 The male screw 18c of the head part 18 and the female screw 17a of the container body 17 are screwed together to fasten the head part 18 and the container main body 17, whereby the bottom surface of the top wall part 18g of the head part 18 and the bottom of the container main body 17 are obtained. The inner tube portion 20a and the outer tube portion 20b, which are the double tubes 20, are sandwiched from above and below by the wall 17b, and the upper and lower ends of the inner tube portion 20a and the outer tube portion 20b are fixed by this sandwiching. Even if an impact is applied, the inner tube portion 20a and the outer tube portion 20b do not vibrate due to the impact.

上記した挟持により２重管２０の外管部２０ｂの上端開口が閉塞されているので、ヘッド部１８の冷媒流入口１８ａから流入してくる気液混合冷媒および潤滑油が内管部２０ａおよび外管部２０ｂの上端開口から入ってしまうことがない。 Since the upper end opening of the outer pipe portion 20b of the double pipe 20 is closed by the above-described clamping, the gas-liquid mixed refrigerant and the lubricating oil flowing from the refrigerant inlet 18a of the head portion 18 are separated from the inner pipe portion 20a and the outer pipe. It does not enter from the upper end opening of the pipe part 20b.

また、スリット２０ｃを冷媒流入口１８ａに対して反対側となる外管部２０ｂの周壁部分に形成し、しかもスリット２０ｃを図３に示すように傾斜させたので、冷媒流入口１８ａから流入した液冷媒および潤滑油がスリット２０ｃから外管部２０ｂ内へ入ることが防止される。このため、このスリット２０ｃから混合冷媒および潤滑油が直接入るのを防止するための傘部材を設ける必要がなく、容器本体１７の径を小さくできる。 Further, since the slit 20c is formed in the peripheral wall portion of the outer tube portion 20b opposite to the refrigerant inlet 18a, and the slit 20c is inclined as shown in FIG. 3, the liquid flowing in from the refrigerant inlet 18a Refrigerant and lubricating oil are prevented from entering the outer tube portion 20b from the slit 20c. For this reason, it is not necessary to provide an umbrella member for preventing the mixed refrigerant and the lubricating oil from directly entering from the slit 20c, and the diameter of the container body 17 can be reduced.

また、オイルブリーダ２３を容器本体１７の底壁１７ｂに固定したので、２重管２０を容器本体１７に取り付ける際にその位置決めが容易となる。 Further, since the oil bleeder 23 is fixed to the bottom wall 17 b of the container body 17, when the double pipe 20 is attached to the container body 17, the positioning becomes easy.

冷媒流入口１８ａをヘッド部１８の円筒部１８ｆの周壁に形成したので、ヘッド部１８の頂壁部１８ｇに冷媒流入口を形成しなくてもよいものとなり、その分ヘッド部１８の径を小さくできる。そのため、冷媒の圧力を受けるヘッド部１８の頂壁部１８ｇ下面の面積が小さくなり、この結果、ヘッド部１８の頂壁部１８ｇの下面を押し上げる力を低減させることができる。このため、ヘッド部１８の雄ネジ１８ｃと容器本体１７の雌ネジ１７ａとが螺合している部分（接続部分）に働く応力が低減し、アキュムレータ１５の耐圧性を向上させることができる。 Since the refrigerant inlet 18a is formed on the peripheral wall of the cylindrical portion 18f of the head portion 18, it is not necessary to form a refrigerant inlet on the top wall portion 18g of the head portion 18, and the diameter of the head portion 18 is reduced accordingly. it can. Therefore, the area of the lower surface of the top wall portion 18g of the head portion 18 that receives the pressure of the refrigerant is reduced. As a result, the force that pushes up the lower surface of the top wall portion 18g of the head portion 18 can be reduced. For this reason, the stress which acts on the part (connection part) which the male screw 18c of the head part 18 and the female screw 17a of the container main body 17 are screwing together reduces, and the pressure resistance of the accumulator 15 can be improved.

図５は、実施例２のアキュムレータ１５０の垂直縦断面図である。図６（ａ）は、図５の管本体２００を示す斜視図である。（ｂ）は、（ａ）のＡ−Ａ線に沿う管本体２００の断面を示す斜視図である。 FIG. 5 is a vertical longitudinal sectional view of the accumulator 150 according to the second embodiment. FIG. 6A is a perspective view showing the tube main body 200 of FIG. (B) is a perspective view which shows the cross section of the pipe main body 200 which follows the AA line of (a).

実施例２のアキュムレータ１５０の構成を説明する。 The structure of the accumulator 150 of Example 2 is demonstrated.

実施例２のアキュムレータ１５０は、図５に示すように、気液分離された冷媒のうち気冷媒を取り込むための管本体２００と、管本体２００の上端の開口を塞ぐ蓋部材１９０等とを備えている。 As shown in FIG. 5, the accumulator 150 according to the second embodiment includes a tube main body 200 for taking in the gas refrigerant out of the gas-liquid separated refrigerant, and a lid member 190 that closes the opening at the upper end of the tube main body 200. ing.

管本体２００は、図５および図６に示すように、その内部に管本体２００の長手方向に沿って併設され且つ貫通した第１穴２００ａ，第２穴２００ｂを有している。 As shown in FIGS. 5 and 6, the pipe body 200 has a first hole 200 a and a second hole 200 b that are provided along and penetrated along the longitudinal direction of the pipe body 200.

また、管本体２００の第１穴２００ａと第２穴２００ｂとの間の仕切壁部２００ｄは管本体２００より短く、その仕切壁部２００ｄの上端および下端は、管本体２００の上端および下端の開口面から没した状態となっている（図６（ａ）参照）。 The partition wall 200d between the first hole 200a and the second hole 200b of the tube body 200 is shorter than the tube body 200, and the upper and lower ends of the partition wall 200d are openings at the upper and lower ends of the tube body 200. It is in a state of being submerged from the surface (see FIG. 6A).

図５に示すように、第１穴２００ａは左側に、第２穴２００ｂは右側に位置している。また、管本体２００の周壁の右側上部には、スリット２００ｃが形成されている。 As shown in FIG. 5, the first hole 200a is located on the left side and the second hole 200b is located on the right side. A slit 200 c is formed in the upper right portion of the peripheral wall of the tube body 200.

オイルブリーダ２３の円筒部２３ｂは、管本体２００の下端開口に嵌入している。円筒部２３ｂの高さは、この管本体２００の下端面から仕切壁部２００ｄの下端までの高さより低く設定されており、円筒部２３ｂの閉塞壁部２３ｅと仕切壁部２００ｄの下端面との間に所定の隙間が形成されている。この隙間により第１穴２００ａと第２穴２００ｂとが連通している。また、オイルブリーダ２３はこの隙間部分に潤滑油取込孔２３ａを介して容器本体１７内の潤滑油を取り込む。 The cylindrical portion 23 b of the oil bleeder 23 is fitted into the lower end opening of the pipe body 200. The height of the cylindrical portion 23b is set to be lower than the height from the lower end surface of the pipe body 200 to the lower end of the partition wall portion 200d, and the height between the closing wall portion 23e of the cylindrical portion 23b and the lower end surface of the partition wall portion 200d. A predetermined gap is formed between them. The first hole 200a and the second hole 200b communicate with each other through this gap. The oil bleeder 23 takes in the lubricating oil in the container main body 17 through the lubricating oil taking-in hole 23a into the gap portion.

蓋部材１９０は、円柱状の基部１９０ｅを有し、この基部１９０ｅの上部にフランジ１９０ｃが形成されている。また、基部１９０ｅの下面には、より小径の嵌入部１９０ｆが形成されており、管本体２００の上端開口２００Ａ（図６の（ａ）参照）に嵌入している。また、嵌入部１９０ｆの下面から下方に突出する第１，２凸部１９０ａ，１９０ｂが併設されており、それぞれ第１穴，第２穴２００ａ，２００ｂに嵌入している。 The lid member 190 has a cylindrical base portion 190e, and a flange 190c is formed on the upper portion of the base portion 190e. A smaller-diameter fitting portion 190f is formed on the lower surface of the base portion 190e, and is fitted into the upper end opening 200A (see FIG. 6A) of the tube main body 200. Moreover, the 1st, 2nd convex parts 190a and 190b which protrude below from the lower surface of the insertion part 190f are provided side by side, and are inserted in the 1st hole and the 2nd holes 200a and 200b, respectively.

また、蓋部材１９０には、その第１凸部１９０ａおよび基部１９０ｅを貫通する貫通穴（連通孔）１９０ｄが形成されており、第１穴２００ａと冷媒流出通路１８ｂがこの貫通穴１９０ｄを介して連通している。 Further, the lid member 190 is formed with a through hole (communication hole) 190d penetrating the first convex portion 190a and the base portion 190e, and the first hole 200a and the refrigerant outflow passage 18b are interposed through the through hole 190d. Communicate.

なお、他の構成は、実施例１と同様であるので、対応する構成に同一符号を付して説明を省略する。 Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.

このアキュムレータ１５０によれば、実施例１と同様な作用・効果が得られ、管本体２００を用いたことにより、実施例１の２重管２０より簡単な構造となり、また管本体２００の第１，２穴２００ａ，２００ｂの上下端の開口が大きいので組み付けが容易となる。また、管本体２００の成形時の管の押し出しが実施例１の２重管２０に比べて良くなり管の加工が安価となる。また、管本体２００は構造が簡単であるので、管本体２００の径やその開口形状を容易に変更することができレイアウト自由度が高いものとなる。 According to this accumulator 150, the same operation and effect as in the first embodiment can be obtained. By using the tube main body 200, the structure is simpler than that of the double tube 20 in the first embodiment. The two holes 200a and 200b have large openings at the upper and lower ends, so that assembly is facilitated. Further, the extrusion of the tube during the formation of the tube main body 200 is better than the double tube 20 of the first embodiment, and the processing of the tube becomes inexpensive. Moreover, since the pipe body 200 has a simple structure, the diameter of the pipe body 200 and the opening shape thereof can be easily changed, and the degree of freedom in layout becomes high.

図６（ｃ）に示すように、管本体２００の仕切壁部２００ｄの厚さを薄くしてもよい。このようにすれば管本体の小型化および軽量化が達成できる。 As shown in FIG. 6C, the thickness of the partition wall 200d of the pipe body 200 may be reduced. In this way, the tube body can be reduced in size and weight.

図７は、実施例３のアキュムレータ１５１の垂直縦断面図である。図８は、図７に示す２つの丸パイプ（直管）３００Ａ，３００Ｂおよびオイルブリーダ２３１を示す斜視図である。 FIG. 7 is a vertical longitudinal sectional view of the accumulator 151 according to the third embodiment. FIG. 8 is a perspective view showing the two round pipes (straight pipes) 300A and 300B and the oil bleeder 231 shown in FIG.

まず、実施例３のアキュムレータ１５１構成を説明する。 First, the configuration of the accumulator 151 according to the third embodiment will be described.

実施例３のアキュムレータ１５１は、図７に示すように、気液分離された冷媒のうち気冷媒を取り込むための２つの丸パイプ３００Ａ，３００Ｂと、この２つの丸パイプ３００Ａ，３００Ｂの下端開口に取り付けられるオイルブリーダ２３１等とを備えている。 As shown in FIG. 7, the accumulator 151 according to the third embodiment includes two round pipes 300A and 300B for taking in the gas refrigerant out of the gas-liquid separated refrigerant, and the lower end openings of the two round pipes 300A and 300B. And an oil bleeder 231 to be attached.

丸パイプ３００Ｂの周壁上部には、図７および図８に示すように、このスリット３００Ｂｃ，３００Ｂｃが形成されている。 As shown in FIGS. 7 and 8, slits 300Bc and 300Bc are formed in the upper part of the peripheral wall of the round pipe 300B.

オイルブリーダ２３１には、丸パイプ３００Ａ，３００Ｂと略同一径の開口を有する嵌合凹部２３１Ａ，２３１Ｂが形成されている。また、この嵌合凹部２３１Ａ，２３１Ｂには２つの丸パイプ３００Ａ，３００Ｂの下部が嵌入している。また、この嵌合凹部２３１Ａ，２３１Ｂを仕切る仕切壁２３１ｄの下部に穴（流路）２３１ｂが形成され、穴２３１ｂを介してこの丸パイプ３００Ａ，３００Ｂが連通している。また、この嵌合凹部２３１Ａの底壁２３１Ａａには、潤滑油取込孔２３１ａが形成されており、嵌合凹部２３１Ａ内に容器本体１７から潤滑油を取り込む。 The oil bleeder 231 is formed with fitting recesses 231A and 231B having openings having substantially the same diameter as the round pipes 300A and 300B. Further, the lower portions of the two round pipes 300A and 300B are fitted into the fitting recesses 231A and 231B. A hole (flow path) 231b is formed in the lower part of the partition wall 231d that partitions the fitting recesses 231A and 231B, and the round pipes 300A and 300B communicate with each other through the hole 231b. A lubricating oil intake hole 231a is formed in the bottom wall 231Aa of the fitting recess 231A, and the lubricating oil is taken into the fitting recess 231A from the container body 17.

なお、他の構成は、実施例１，２と同様であるので、対応する構成に同一符号を付して説明を省略する。 Since other configurations are the same as those of the first and second embodiments, the corresponding components are denoted by the same reference numerals and description thereof is omitted.

このアキュムレータ１５１によれば、実施例２と同様な作用・効果が得られ、丸パイプ３００Ａ，３００Ｂが別体であるので丸パイプ３００Ａ，３００Ｂへのスリット３００Ｂｃの形成が容易である。 According to this accumulator 151, the same operation and effect as in the second embodiment can be obtained, and since the round pipes 300A and 300B are separate, it is easy to form the slit 300Bc in the round pipes 300A and 300B.

また、丸パイプ３００Ａ，３００Ｂは簡単な構造であるので、加工コストがかからず安価となる。 Further, since the round pipes 300A and 300B have a simple structure, the processing cost is not required and the cost is low.

丸パイプ３００Ａ，３００Ｂが別体であるので、丸パイプ３００Ａに対向する丸パイプ３００Ｂの周壁部分のみにスリット３００Ｂｃを形成しても良い。このようにすれば、ヘッド部１８の冷媒流入口１８ａから入ってくる混合冷媒や潤滑油がかかりにくく、また容器本体１７が振動した場合、左右方向から液冷媒がかかりにくいものとなる。 Since the round pipes 300A and 300B are separate bodies, the slit 300Bc may be formed only in the peripheral wall portion of the round pipe 300B facing the round pipe 300A. In this way, the mixed refrigerant and lubricating oil entering from the refrigerant inlet 18a of the head portion 18 are difficult to be applied, and when the container body 17 vibrates, the liquid refrigerant is difficult to be applied from the left and right directions.

以上、本発明の実施例に係るアキュムレータ１５，１５０，１５１を説明してきたが、具体的な構成については、これらに限られるものではなく、特許請求の範囲の各請求項に係る発明の要旨を逸脱しない限り、設計の変更や追加等は許容される。 As described above, the accumulators 15, 150, and 151 according to the embodiments of the present invention have been described. However, the specific configuration is not limited to these, and the gist of the invention according to each claim of the claims is described. Unless it deviates, design changes and additions are allowed.

実施例１〜実施例３では、ＣＯ_２冷凍サイクル１００に対しアキュムレータ１５，１５０，１５１を適用する例を示したが、フロン類を用いる冷凍サイクルのアキュムレータに対しても適用することができる。 In the first to third embodiments, the example in which the accumulators 15, 150, and 151 are applied to the CO ₂ refrigeration cycle 100 is shown, but the present invention can also be applied to an accumulator of a refrigeration cycle that uses chlorofluorocarbons.

実施例のアキュムレータが適用されたＣＯ_２冷凍サイクル（超臨界冷凍サイクル用）を示すサイクルシステム図である。It is a cycle system diagram showing the accumulator applied CO ₂ refrigeration cycle of the embodiment (for supercritical refrigeration cycle). 図１のエバポレータ１３を示す平面図である。It is a top view which shows the evaporator 13 of FIG. 実施例１のアキュムレータ１５の全体構成を示す垂直縦断面図である。1 is a vertical longitudinal sectional view illustrating an overall configuration of an accumulator 15 according to a first embodiment. （ａ）アキュムレータ１５の２重管２０を示す斜視図である。（ｂ）２重管２０の部分断面図である。（ｃ）アキュムレータ１５のオイルブリーダ２３を示す斜視図である。(A) It is a perspective view which shows the double tube 20 of the accumulator 15. FIG. (B) It is a fragmentary sectional view of the double pipe 20. FIG. (C) It is a perspective view which shows the oil bleeder 23 of the accumulator 15. FIG. 実施例２のアキュムレータ１５０の垂直縦断面図である。It is a vertical longitudinal cross-sectional view of the accumulator 150 of Example 2. FIG. （ａ）図６の管本体２００を示す斜視図である。（ｂ）この管本体２００のＡ−Ａ線に沿って切断した断面斜視図である。（ｃ）（ａ）の管本体の厚さをより薄くした実施例２の他の例の管本体の断面斜視図を示す。(A) It is a perspective view which shows the pipe | tube main body 200 of FIG. (B) It is the cross-sectional perspective view cut | disconnected along the AA line of this pipe | tube main body 200. FIG. (C) The cross-sectional perspective view of the pipe main body of the other example of Example 2 which made the thickness of the pipe main body of (a) thinner was shown. 実施例３のアキュムレータ１５１の垂直縦断面図である。It is a vertical longitudinal cross-sectional view of the accumulator 151 of Example 3. 図７に示す２つの丸パイプ３００Ａ，３００Ｂおよびオイルブリーダ２３１を示す斜視図である。FIG. 8 is a perspective view showing two round pipes 300A and 300B and an oil bleeder 231 shown in FIG. 従来のアキュムレータ１の垂直縦断面図である。It is a vertical longitudinal cross-sectional view of the conventional accumulator 1.

Explanation of symbols

１７容器本体
１７ａ雌ネジ（第１ネジ部）
１８ヘッド部
１８ｂ冷媒流出通路
１８ｃ雄ネジ（第２ネジ部）
１８ｆ円筒部
２０２重管（吸込管）
２０ｂ外管（外管部）
２０ｃスリット（気冷媒取込孔）
17 Container body 17a Female screw (first screw part)
18 Head part 18b Refrigerant outflow passage 18c Male thread (second thread part)
18f Cylindrical part 20 Double pipe (suction pipe)
20b Outer pipe (outer pipe part)
20c slit (air refrigerant intake hole)

Claims

A container main body having an opening in the upper part for storing refrigerant and lubricating oil, a lower end opening, an inlet for allowing the refrigerant and lubricating oil to flow in, and a gas phase refrigerant out of the refrigerant. A head portion in which an outlet is formed and closes the opening of the container body;
A lubricating oil intake hole for taking in the lubricating oil in the container body, a gas refrigerant taking hole for taking in the gas phase refrigerant out of the refrigerant in the container body, and a discharge hole for discharging the taken in gas phase refrigerant and lubricating oil. An accumulator comprising a suction pipe disposed in the container body,
Fasten the head to the opening of the container body,
By this fastening, the suction pipe is sandwiched between the bottom part of the container main body and the head part, and the discharge hole of the suction pipe is communicated with the outlet of the head part.

2. The accumulator according to claim 1, wherein the refrigerant intake hole of the suction pipe is formed to be inclined obliquely downward from the inside to the outside of the refrigerant intake pipe.

Both ends of the suction pipe are open, the opening of one end of the suction pipe is the discharge hole,
The oil bleeder in which the lubricating oil intake hole is formed is fixed to the bottom of the container body,
The accumulator according to claim 1 or 2, wherein the oil bleeder is fitted into an opening at the other end of the suction pipe.

The suction pipe is a double pipe having an outer pipe extending in the vertical direction and an inner pipe disposed in the outer pipe and having a shorter length than the outer pipe,
The head portion has a cylindrical portion whose upper and lower ends are open, and a top wall portion that closes the upper end opening of the cylindrical portion and forms the outlet that communicates with the cylindrical portion,
A lid member having a large-diameter convex portion and a small-diameter convex portion integrally formed on the lower end surface of the large-diameter convex portion is joined to the lower surface of the top wall portion of the head portion,
Inserting the small-diameter convex portion of the lid member into the upper end opening of the inner tube and inserting the large-diameter convex portion into the upper end opening of the outer tube,
Forming a communication hole in the lid member for communicating the outlet of the top wall and the inside of the inner pipe;
The gas refrigerant intake hole is formed in a peripheral wall of the outer pipe,
4. The accumulator according to claim 2, wherein the oil bleeder is fitted into a lower end opening of the outer pipe and a gap is formed between a lower end surface of the inner pipe and the oil bleeder. 5. .

The suction pipe has a pipe body extending vertically, and two first and second holes that are arranged in parallel along the longitudinal direction in the pipe body and penetrated.
The head portion has a cylindrical portion whose upper and lower ends are open, and a top wall portion that closes the upper end opening of the cylindrical portion and forms the outlet that communicates with the cylindrical portion,
Bonding a lid member in which first and second protrusions projecting downward are arranged in parallel to the lower surface of the top wall portion of the head portion,
The first convex portion of the lid member is fitted into the first hole of the tube body and the second convex portion of the lid member is fitted into the second hole of the tube body,
Forming a communication hole in the lid member for communicating the outlet of the top wall with the first hole of the tube body;
The gas refrigerant intake hole is formed in the peripheral wall on the second hole side of the pipe body,
The oil bleeder is fitted into a lower end opening of the pipe body, and a gap is formed between the lower end of a partition wall that partitions the first hole and the second hole of the pipe body and the oil bleeder. The accumulator according to claim 2 or claim 3.

The suction pipe has two straight pipes extending in the vertical direction,
The head portion has a cylindrical portion whose upper and lower ends are opened, and a top wall portion which closes the upper end opening of the cylindrical portion and forms the outlet port communicating with the cylindrical portion,
Bonding a lid member in which first and second protrusions projecting downward are arranged in parallel to the lower surface of the top wall portion of the head portion,
The first convex part of the lid member is fitted into the upper end opening of one straight pipe and the second convex part is fitted into the upper end opening of the other straight pipe,
Forming a communication hole in the lid member for communicating the outlet of the top wall with the one of the straight pipes;
The gas refrigerant intake hole is formed in a peripheral wall of the other straight pipe, and the oil bleeder has two insertion holes and a flow path in which the two insertion holes communicate with each other.
4. The accumulator according to claim 2, wherein lower ends of the two straight pipes are respectively inserted into two insertion holes of the oil bleeder. 5.

The accumulator according to any one of claims 1 to 6, wherein the inlet is formed in a peripheral wall of a cylindrical portion of the head portion.

The accumulator according to claim 1, wherein the refrigerant intake hole is formed at a position opposite to the inlet.