JP2012219762A - Hermetic compressor - Google Patents

Hermetic compressor Download PDF

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JP2012219762A
JP2012219762A JP2011088735A JP2011088735A JP2012219762A JP 2012219762 A JP2012219762 A JP 2012219762A JP 2011088735 A JP2011088735 A JP 2011088735A JP 2011088735 A JP2011088735 A JP 2011088735A JP 2012219762 A JP2012219762 A JP 2012219762A
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compressor
oil
refrigerant
hermetic compressor
stator
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Takushi Sasa
卓士 佐々
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Panasonic Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a hermetic compressor excelling in performance and reliability by sufficiently separating oil from discharged gas refrigerant to reduce a discharge amount of the refrigerating machine oil.SOLUTION: In the compressor provided with a discharge port inside a valve cover 10, a spouting part 11 formed of a gap between the valve cover 10 and the boss of an upper bearing 9 is set in the inside at 1/4-3/4 of the height of a lower coil end 7 of a stator 5, so that separation of oil from the discharged gas refrigerant can be performed sufficiently in the inside of the compressor and the hermetic compressor with a small discharge amount of refrigerating machine oil can be constructed.

Description

本発明は、密閉容器内に電動要素と圧縮要素とを備えてなる、密閉型圧縮機の構造に関するものである。   The present invention relates to a structure of a hermetic compressor including an electric element and a compression element in a hermetic container.

一般に、冷凍サイクル中に冷凍機油が混入すると、熱交換器の熱抵抗が増え、配管の圧力損失が増大し、冷凍サイクルの効率を低下させることが知られている。また、冷凍機油の吐出量が増加すると、圧縮機は潤滑不足となり、圧縮機の信頼性が損なわれるという問題がある。このため、空気調和装置等に使用される密閉型圧縮機では、様々な油分離手段が設けられている（例えば、特許文献１参照）。   In general, it is known that when refrigeration oil is mixed in a refrigeration cycle, the heat resistance of the heat exchanger increases, the pressure loss of the piping increases, and the efficiency of the refrigeration cycle decreases. Moreover, when the discharge amount of refrigerating machine oil increases, there is a problem that the compressor becomes insufficiently lubricated and the reliability of the compressor is impaired. For this reason, various oil separation means are provided in a hermetic compressor used in an air conditioner or the like (see, for example, Patent Document 1).

図２は特許文献１に記載された従来の油分離手段を示すものである。図２に示すように、圧縮機要素３で圧縮され、密閉容器１内に吐出されたガスは、固定子５の外周に設けた前記密閉容器１との冷媒通路１３及び前記固定子５と回転子６との間に形成されたエアギャップ１２を通って前記密閉容器１内の上部空間に導かれる。   FIG. 2 shows a conventional oil separating means described in Patent Document 1. In FIG. As shown in FIG. 2, the gas compressed by the compressor element 3 and discharged into the sealed container 1 rotates with the refrigerant passage 13 and the stator 5 provided in the outer periphery of the stator 5 and the sealed container 1. The air gap 12 formed with the child 6 is guided to the upper space in the sealed container 1.

前記回転子６の上部には薄い鉄板等で作った油分離板１４が上部エンドリング１５等を利用してカシメ固定されている。また、吐出管１６の入口開口端１７に、前記油分離板１４に平行に、かつ、中央部に穴を有する平行板１８を固着させる。前記平行板１８の中央穴部１９は、前記吐出管１６の入口開口端１７に固着されている。   An oil separation plate 14 made of a thin iron plate or the like is fixed to the upper portion of the rotor 6 by using an upper end ring 15 or the like. Further, a parallel plate 18 having a hole in the central portion thereof is fixed to the inlet opening end 17 of the discharge pipe 16 in parallel with the oil separation plate 14. A central hole 19 of the parallel plate 18 is fixed to the inlet opening end 17 of the discharge pipe 16.

そして、上部空間に導かれたガスは油分離板１４と平行板１８の間を通り、吐出管１６より吐出されるが、圧縮機運転中は前記回転子６とともに前記油分離板１４も回転するので、前記吐出管１６の入口開口端１７に流入する際、前記油分離板１４に油成分は付着し、遠心力によって、半径方向へ吹き飛ばされるが、ガス成分は、前記吐出管１６の入口開口端１７に流入する。   The gas guided to the upper space passes between the oil separation plate 14 and the parallel plate 18 and is discharged from the discharge pipe 16, but the oil separation plate 14 rotates together with the rotor 6 during the compressor operation. Therefore, when flowing into the inlet opening end 17 of the discharge pipe 16, the oil component adheres to the oil separation plate 14 and is blown away in the radial direction by centrifugal force. It flows into the end 17.

特開昭６２−１４７０８２号公報JP-A-62-147082

しかしながら、前記従来の構成では、密閉容器内の底部に貯溜された冷凍機油が圧縮機運転中に発泡し、圧縮機要素から吐出されるガスにミスト状に溶け込み、密閉容器内上部に導かれ、その油成分を吐出管入口開口端付近で分離させるよう構成しているため、冷凍サイクルの循環量が増加した場合では、油分離板の回転の遠心力よりも吐出ガスの流速の力の方が強く、十分な油分離作用が期待できないという課題を有していた。   However, in the conventional configuration, the refrigerating machine oil stored at the bottom of the sealed container is foamed during the compressor operation, dissolved in the gas discharged from the compressor element in the form of a mist, led to the upper part in the sealed container, Since the oil component is separated near the opening end of the discharge pipe inlet, when the circulation rate of the refrigeration cycle is increased, the force of the discharge gas flow rate is more than the centrifugal force of rotation of the oil separation plate. There was a problem that it was strong and sufficient oil separation action could not be expected.

本発明は、前記従来の課題を解決するもので、圧縮機内部、特に電動機要素と圧縮機要素との間で吐出ガス冷媒と油分離を十分に行うことを可能とした密閉型圧縮機を提供することを目的とする。   The present invention solves the above-mentioned conventional problems, and provides a hermetic compressor capable of sufficiently separating the discharged gas refrigerant and oil inside the compressor, particularly between the motor element and the compressor element. The purpose is to do.

前記従来の課題を解決するために、本発明の密閉型圧縮機は、上軸受に内部に吐出孔を設け、これにバルブカバーを固着し、このバルブカバーからの噴出し部を、前記電動機要素の固定子の下部コイルエンドの高さ方向の１／４〜３／４の内部に位置するように配置
したものである。 In order to solve the above-described conventional problems, a hermetic compressor according to the present invention is provided with a discharge hole in an upper bearing, a valve cover is fixed to the upper bearing, and an ejection portion from the valve cover is defined as the electric motor element. The lower coil ends of the stators are arranged so as to be located within 1/4 to 3/4 of the height direction.

これによって、冷凍機油がミスト状に溶け込んだ冷媒ガスが外周を固定子の下部コイルエンドで囲まれた内部空間に確実に噴出し、その内部で循環、滞留しながらその大部分が固定子の下部コイルエンドを通過、衝突することにより冷媒ガスと冷凍機油とを分離し、冷凍サイクルの循環量が増加しても冷凍機油の吐出を抑えることができる。   As a result, the refrigerant gas in which the refrigeration oil is dissolved in the form of mist is surely jetted into the inner space surrounded by the lower coil end of the stator, and most of the refrigerant gas is circulated and retained inside the lower part of the stator. The refrigerant gas and the refrigerating machine oil are separated by passing through and colliding with the coil end, and the discharge of the refrigerating machine oil can be suppressed even if the circulation amount of the refrigerating cycle increases.

本発明の密閉型圧縮機は、圧縮機の油吐出量を低く抑えることができ、冷凍サイクルの効率を低下させることがない。また、圧縮機の潤滑不足により圧縮機の信頼性が損なわれるという問題の発生を防止できる。   The hermetic compressor of the present invention can keep the amount of oil discharged from the compressor low, and does not reduce the efficiency of the refrigeration cycle. Further, it is possible to prevent the occurrence of the problem that the reliability of the compressor is impaired due to insufficient lubrication of the compressor.

本発明の実施の形態１における密閉型圧縮機の断面図Sectional drawing of the hermetic compressor in Embodiment 1 of this invention 従来の密閉型圧縮機の断面図Cross section of a conventional hermetic compressor

本発明の密閉型圧縮機は、密閉容器内の上部に電動機要素を収納し、下部に前記電動機要素により駆動される圧縮機要素を収納し、前記密閉容器内の底部に冷凍機油を貯溜し、前記圧縮機要素の上軸受にバルブカバーを固着した密閉型圧縮機であって、前記バルブカバーと前記上軸受ボス部との隙間からなる噴出し部を、前記電動機要素の固定子の下部コイルエンドの高さ方向の１／４以上３／４以下に位置するように配置されている。これにより、冷凍機油がミスト状に溶け込んだ冷媒ガスが外周を固定子の下部コイルエンドで囲まれた内部空間に確実に噴出し、その内部で循環、滞留しながらその大部分が固定子の下部コイルエンドを通過、衝突することにより冷媒ガスと冷凍機油とを分離した状態で、固定子外周に設けた冷媒通路を通過して密閉容器外部に吐出され、冷凍サイクルの循環量が増加しても冷凍機油の吐出を抑えることができる。
ある実施形態において、塩素を含まないＨＣＦＣ、ＨＦＣを冷媒として用いる。
ある実施形態において、自然冷媒を冷媒として用いる。 The hermetic compressor of the present invention accommodates an electric motor element in the upper part of the hermetic container, accommodates a compressor element driven by the electric motor element in the lower part, stores refrigerating machine oil at the bottom of the hermetic container, A hermetic compressor in which a valve cover is fixed to an upper bearing of the compressor element, wherein a jetting portion formed by a gap between the valve cover and the upper bearing boss portion is provided at a lower coil end of a stator of the motor element. It is arrange | positioned so that it may be located in 1/4 or more and 3/4 or less of the height direction. As a result, the refrigerant gas in which the refrigeration oil is dissolved in a mist state is surely ejected into the inner space surrounded by the lower coil end of the stator, and most of the refrigerant gas is circulated and retained inside the stator. Even if the refrigerant gas and the refrigerating machine oil are separated by passing through and colliding with the coil end, the refrigerant gas passes through the refrigerant passage provided on the outer periphery of the stator and is discharged to the outside of the hermetic container. Discharge of refrigeration oil can be suppressed.
In an embodiment, HCFC and HFC not containing chlorine are used as the refrigerant.
In some embodiments, a natural refrigerant is used as the refrigerant.

以下、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。なお、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
図１は、本発明の第１の実施の形態における密閉型圧縮機の断面図である。密閉容器１内の上部に電動機要素２と、下部に電動機要素２により駆動される圧縮機要素３を収納する。圧縮機要素３は気液分離器４より吸入された冷媒ガスを高温高圧にし、密閉容器１内に排出するものである。電動機要素２は固定子５と回転子６とから成り、固定子５の下部コイルエンド７は密閉容器１内径近傍で圧縮機要素３側にリング状に盛り上った形状である。 (Embodiment 1)
FIG. 1 is a cross-sectional view of a hermetic compressor according to a first embodiment of the present invention. An electric motor element 2 is housed in the upper part of the hermetic container 1 and a compressor element 3 driven by the electric motor element 2 is housed in the lower part. The compressor element 3 is configured to change the refrigerant gas sucked from the gas-liquid separator 4 to a high temperature and high pressure and discharge the refrigerant gas into the sealed container 1. The electric motor element 2 includes a stator 5 and a rotor 6, and the lower coil end 7 of the stator 5 has a shape raised in a ring shape on the compressor element 3 side in the vicinity of the inner diameter of the hermetic container 1.

図１において、圧縮機要素３の上軸受９に圧縮機要素３により吐出されたガスを受けるバルブカバー１０を設けている。バルブカバー１０の噴出し部１１を、上軸受９のボス部との隙間に位置するようリング状に吐出させ、噴出し部１１の開口部を固定子５の下部コイルエンド７の高さ（Ｌｓ）の１／４以上３／４以下の間に位置するよう設ける。   In FIG. 1, a valve cover 10 that receives gas discharged from the compressor element 3 is provided on the upper bearing 9 of the compressor element 3. The ejection part 11 of the valve cover 10 is discharged in a ring shape so as to be positioned in the gap with the boss part of the upper bearing 9, and the opening part of the ejection part 11 is the height (Ls) of the lower coil end 7 of the stator 5. ) To be located between 1/4 and 3/4.

以上のように構成された密閉型圧縮機について、以下その動作、作用を説明する。
まず、前記圧縮機要素３により圧縮されたガスは、バルブカバー１０の噴出し部１１を通り密閉容器１内に吐出されるが、噴出し部１１の開口部が固定子５下部コイルエンド７の高さの１／４以上３／４以下の間に位置するため、吐出された冷凍機油がミスト状に溶け
込んだ冷媒ガスは外周を固定子５の下部コイルエンド７で囲まれた内部空間に噴出し、その内部で循環、滞留しながらその大部分が固定子５の下部コイルエンド７を通過、衝突により冷媒ガスと冷凍機油とを分離することが出来る。これにより、冷凍サイクルの循環量が増加しても圧縮機内部から冷凍機油の吐出を抑えることができる。
なお、冷媒には、塩素を含まないＨＣＦＣ、ＨＦＣを用いることができる。また、二酸化炭素やアンモニア等の自然冷媒を用いることができる。 The operation and action of the hermetic compressor configured as described above will be described below.
First, the gas compressed by the compressor element 3 passes through the ejection part 11 of the valve cover 10 and is discharged into the hermetic container 1, but the opening part of the ejection part 11 is formed in the lower coil end 7 of the stator 5. Because it is located between 1/4 and 3/4 of the height, the refrigerant gas that has been discharged from the refrigerating machine oil is injected into the inner space surrounded by the lower coil end 7 of the stator 5 as a mist. However, most of the refrigerant passes through the lower coil end 7 of the stator 5 while circulating and staying inside, and the refrigerant gas and the refrigerating machine oil can be separated by collision. Thereby, even if the circulation amount of a refrigerating cycle increases, discharge of refrigerating machine oil from the inside of a compressor can be suppressed.
Note that HCFC or HFC not containing chlorine can be used as the refrigerant. Natural refrigerants such as carbon dioxide and ammonia can be used.

本発明は、空気調和器や冷蔵庫等の種々の冷凍機器の圧縮機に適用できる。   The present invention can be applied to compressors of various refrigeration equipment such as air conditioners and refrigerators.

１ 密閉容器
２ 電動機要素
３ 圧縮機要素
４ 気液分離器
５ 固定子
６ 回転子
７ 下部コイルエンド
９ 上軸受
１０ バルブカバー
１１ 噴出し部
１２ エアギャップ
１３ 冷媒通路
１４ 油分離板
１５ 上部エンドリング
１６ 吐出管
１７ 入口開口端
１８ 平行板 DESCRIPTION OF SYMBOLS 1 Airtight container 2 Electric motor element 3 Compressor element 4 Gas-liquid separator 5 Stator 6 Rotor 7 Lower coil end 9 Upper bearing 10 Valve cover 11 Blowing part 12 Air gap 13 Refrigerant passage 14 Oil separation plate 15 Upper end ring 16 Discharge pipe 17 Inlet opening end 18 Parallel plate

Claims (3)

密閉容器内の上部に電動機要素を収納し、下部に前記電動機要素により駆動される圧縮機要素を収納し、前記密閉容器内の底部に冷凍機油を貯溜し、前記圧縮機要素の上軸受にバルブカバーを固着した密閉型圧縮機であって、
前記バルブカバーと前記上軸受ボス部との隙間からなる噴出し部を、前記電動機要素の固定子の下部コイルエンドの高さ方向の１／４以上３／４以下に位置するように配置した密閉型圧縮機。 A motor element is housed in the upper part of the sealed container, a compressor element driven by the motor element is housed in the lower part, refrigerating machine oil is stored in the bottom part of the sealed container, and a valve is mounted on the upper bearing of the compressor element. A hermetic compressor with a cover fixed,
A sealing part in which a jetting part formed by a gap between the valve cover and the upper bearing boss part is disposed so as to be located at ¼ or more and ¾ or less of the height direction of the lower coil end of the stator of the motor element. Mold compressor. 塩素を含まないＨＣＦＣ、ＨＦＣを冷媒とした請求項１記載の密閉型圧縮機。 The hermetic compressor according to claim 1, wherein HCFC and HFC not containing chlorine are used as a refrigerant. 自然冷媒を冷媒とした請求項１記載の密閉型圧縮機。 The hermetic compressor according to claim 1, wherein a natural refrigerant is used as the refrigerant.
JP2011088735A 2011-04-13 2011-04-13 Hermetic compressor Withdrawn JP2012219762A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020026745A (en) * 2018-08-09 2020-02-20 東芝キヤリア株式会社 Rotating compressor and refrigeration cycle device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020026745A (en) * 2018-08-09 2020-02-20 東芝キヤリア株式会社 Rotating compressor and refrigeration cycle device
JP7360785B2 (en) 2018-08-09 2023-10-13 東芝キヤリア株式会社 Rotary compressor and refrigeration cycle equipment

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