JP2009228512A

JP2009228512A - Hermetic compressor

Info

Publication number: JP2009228512A
Application number: JP2008073290A
Authority: JP
Inventors: Toru Aya; 亨綾; Kosei Sakimoto; 孝正先本
Original assignee: Panasonic Corp
Current assignee: Panasonic Corp
Priority date: 2008-03-21
Filing date: 2008-03-21
Publication date: 2009-10-08

Abstract

<P>PROBLEM TO BE SOLVED: To solve such problems that, in a rotary type hermetic compressor in which an electric motor and a compression mechanism section connected to the electric motor are received in a closed vessel having an oil sump at a bottom and gas compressed by the compression mechanism section is once discharged in the closed vessel to provide high pressure in the closed vessel, a balance weight attached to a rotor of the electric motor agitates the inside of the compressor and causes wind noise and increase of a discharge amount of atomized refrigerant oil into a refrigeration cycle. <P>SOLUTION: The balance weight is constructed of a disk-like thing combining a half-circular metal part 7 and a resin part 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、底部にオイル溜を有する密閉容器内に回転子と固定子からなる電動機部と、圧縮機部とを備え、電動機から伝わった回転力によって圧縮機部を駆動することにより冷媒を圧縮する機構を有する密閉型圧縮機の構造に関するものである。 The present invention includes an electric motor unit including a rotor and a stator in a sealed container having an oil reservoir at the bottom, and a compressor unit, and compresses the refrigerant by driving the compressor unit by the rotational force transmitted from the electric motor. The present invention relates to a structure of a hermetic compressor having a mechanism for

一般的に、密閉型圧縮機に組み込まれる電動機の回転子には半環状のバランスウェイトが取り付けられ、圧縮機構のアンバランスを補正している。しかし、バランスウェイトの回転運動により、冷媒ガスとの風損によって圧縮機の入力値の増加や風切り音の発生が起こっていた。また圧縮機内部の撹拌によって冷凍機油が霧化、冷媒ガスと共に冷凍サイクルへと吐出され、冷凍システムの伝熱性に大きな悪影響を与えていた。また、圧縮機内の冷凍機油の減少により圧縮機部の潤滑不良等の問題が発生する要因ともなっていた。そのため特許文献１に示すようにバランスウェイトの体積を小さくし、圧縮機内部の撹拌を最小限に抑える試みがなされていた。
特開２００１−１６１０４１号公報 Generally, a semi-annular balance weight is attached to a rotor of an electric motor incorporated in a hermetic compressor to correct an imbalance of the compression mechanism. However, the rotational movement of the balance weight caused an increase in the input value of the compressor and the generation of wind noise due to windage loss with the refrigerant gas. Moreover, the compressor oil was atomized and discharged into the refrigeration cycle together with the refrigerant gas by stirring inside the compressor, which had a great adverse effect on the heat transfer performance of the refrigeration system. Moreover, it has become a factor that problems such as poor lubrication of the compressor portion occur due to a decrease in refrigerating machine oil in the compressor. Therefore, as shown in Patent Document 1, attempts have been made to reduce the volume of the balance weight and minimize stirring inside the compressor.
JP 2001-161041 A

従来の圧縮機では、バランスウェイトの回転により上記に述べた圧縮機の入力増加、風切り音の発生、冷凍機油の吐出量増加、潤滑不良等の不具合が起こっていた。 In conventional compressors, the rotation of the balance weight has caused the above-described problems such as an increase in compressor input, generation of wind noise, increase in refrigeration oil discharge, and poor lubrication.

本発明は上記事情に基づきなされたものであり、その目的とするところは、バランスウェイトの機能を損なうことなく上記不具合を解決し、より信頼性の高く、高効率で騒音の小さい密閉型圧縮機を提供しようとするものである。 The present invention has been made based on the above circumstances, and an object of the present invention is to solve the above problems without impairing the function of the balance weight, and to provide a hermetic compressor with higher reliability, higher efficiency and less noise. Is to provide.

上記目的を満足するため、本発明の密閉型圧縮機は、金属と樹脂を組み合わせた環状のバランスウェイトを電動機の回転子に取り付ける。 In order to satisfy the above-described object, the hermetic compressor of the present invention is provided with an annular balance weight in which a metal and a resin are combined, attached to a rotor of an electric motor.

本発明によれば、バランスウェイトによる圧縮機内部での冷媒の撹拌が起こらないため、静粛信頼性、省エネに優れた圧縮機を提供することができる。 According to the present invention, since the refrigerant is not stirred inside the compressor by the balance weight, it is possible to provide a compressor excellent in quiet reliability and energy saving.

（実施の形態１）
本発明における圧縮機の断面図を図１に示す。固定子１と回転子２から構成される電動機には回転軸３が取り付けられ、下部の圧縮機部４と接続されている。固定子１の上部と下部にはそれぞれ上部バランスウェイト５、下部バランスウェイト６が取り付けられ、これらが一体となって回転し、回転軸３によって圧縮機部４に動力が伝えられる。本発明では上部バランスウェイト５、下部バランスウェイト６双方を金属部分と樹脂部分の組み合わせによって構成した。図２に具体的形状を示す。半環状の金属部分７と、同じく半環状の樹脂部分８の組み合わせにより環状のバランスウェイトを構成する。従来の半環状のバランスウェイトが回転すると、回転方向に鉛直に相対する端面が冷媒を撹拌していたが、本発明の当該バランスウェイトは円盤状であるため、回転運動中も圧縮機中の冷媒を撹拌することなく、また冷凍機油を霧化させることもない。一般的に鉄、真鍮等の金属材料は樹脂材料に比べ比重大きいので、図２に示す環状のバランスウェイトでも、圧縮機部のアンバランスを解消するという本来の機能を損なうことはない。 (Embodiment 1)
A cross-sectional view of the compressor according to the present invention is shown in FIG. A rotating shaft 3 is attached to an electric motor composed of a stator 1 and a rotor 2, and is connected to a lower compressor unit 4. An upper balance weight 5 and a lower balance weight 6 are attached to an upper portion and a lower portion of the stator 1, respectively, and rotate integrally, and power is transmitted to the compressor portion 4 by the rotating shaft 3. In the present invention, both the upper balance weight 5 and the lower balance weight 6 are constituted by a combination of a metal portion and a resin portion. FIG. 2 shows a specific shape. An annular balance weight is constituted by a combination of the semicircular metal portion 7 and the semicircular resin portion 8. When the conventional semi-annular balance weight rotates, the end face perpendicular to the rotation direction stirs the refrigerant. However, since the balance weight of the present invention is disk-shaped, the refrigerant in the compressor is also in rotation. Is not agitated and the refrigerating machine oil is not atomized. Since metal materials such as iron and brass are generally higher in specific gravity than resin materials, the annular balance weight shown in FIG. 2 does not impair the original function of eliminating unbalance of the compressor section.

（実施の形態２）
前記半環状の金属部分及び樹脂部分の形状は半環状に限定されることは無く、図２に示すとおり中心角を変えることも可能である。この場合、圧縮機部のアンバランス量に応じた比率にすることによって設計の際の自由度が向上するというメリットもある。 (Embodiment 2)
The shapes of the semicircular metal portion and the resin portion are not limited to the semicircular shape, and the center angle can be changed as shown in FIG. In this case, there is also an advantage that the degree of freedom in design is improved by setting the ratio according to the unbalance amount of the compressor section.

（実施の形態３）
また、近年オゾン層保護の観点から、塩素を含まないＨＦＣ冷媒を用いた圧縮機が開発されている。当機構を有した圧縮機をこのようなＨＦＣ冷媒に用いることも可能である。 (Embodiment 3)
In recent years, a compressor using an HFC refrigerant not containing chlorine has been developed from the viewpoint of protecting the ozone layer. It is also possible to use a compressor having this mechanism for such an HFC refrigerant.

（実施の形態４）
また、近年地球温暖化防止の観点から二酸化炭素、ヘリウム、アンモニア等の自然冷媒を用いた圧縮機が開発されている。そのような自然冷媒を用いた圧縮機に当発明を適用することも可能である。 (Embodiment 4)
In recent years, compressors using natural refrigerants such as carbon dioxide, helium, and ammonia have been developed from the viewpoint of preventing global warming. The present invention can be applied to a compressor using such a natural refrigerant.

（実施の形態５）
通常圧縮機には、使用する冷媒や圧縮機構部４に用いられる材質によって様々な種類のオイルが使用されている。当発明は、圧縮機で主に用いられているナフテン油、パラフィン油、アルキルベンゼン油などの天然物あるいは天然物由来のオイル、およびポリエーテル系油、ポリオールエステル系油などの合成オイル、または前記天然物あるいは天然物由来のオイルと合成オイルの混合オイルなどにも適用することが可能である。 (Embodiment 5)
Normally, various types of oil are used in the compressor depending on the refrigerant used and the material used for the compression mechanism section 4. The present invention includes natural products such as naphthenic oils, paraffin oils, and alkylbenzene oils mainly used in compressors or oils derived from natural products, and synthetic oils such as polyether oils and polyol ester oils, or the natural oils described above. It is also possible to apply to mixed oils of oils derived from products or natural products and synthetic oils.

以上のように本発明にかかる密閉型圧縮機は、静粛信頼性、省エネに優れた圧縮機を提供することがが可能となるので、空気調和機や冷蔵庫などの冷凍機器に適用できる。 As described above, since the hermetic compressor according to the present invention can provide a compressor excellent in quiet reliability and energy saving, it can be applied to refrigeration equipment such as an air conditioner and a refrigerator.

密閉型圧縮機の断面図Cross section of hermetic compressor 実施の形態１によるバランスウェイトを示す斜視図The perspective view which shows the balance weight by Embodiment 1. FIG. 実施の形態２によるバランスウェイトを示す斜視図The perspective view which shows the balance weight by Embodiment 2. FIG.

Explanation of symbols

１固定子
２回転子
３回転軸
４圧縮機部
５上部バランスウェイト
６下部バランスウェイト
７金属部分
８樹脂部分 DESCRIPTION OF SYMBOLS 1 Stator 2 Rotor 3 Rotating shaft 4 Compressor part 5 Upper balance weight 6 Lower balance weight 7 Metal part 8 Resin part

Claims

In a hermetic compressor having an electric motor and a compression mechanism in an airtight container having an oil reservoir at the bottom, the balance weight attached to the stator of the electric motor includes a semi-annular metal part and a semi-annular resin part. A hermetic compressor with a disk shape combined at opposite positions.

The hermetic compressor according to claim 1, wherein the central angle of the metal portion of the balance weight is 180 degrees or less.

The hermetic compressor according to claim 1, wherein HCFC, HFC or the like not containing chlorine is used as a refrigerant.

The hermetic compressor according to claim 1, wherein a natural refrigerant such as carbon dioxide, ammonia, or helium is used as a refrigerant.

Natural products such as naphthenic oils, paraffin oils, alkylbenzene oils, or oils derived from natural products, and synthetic oils such as polyether oils and polyol ester oils, or mixed oils of the above natural products or natural products and oils The hermetic compressor according to claim 1, wherein