JPH0968166A - Isolation structure of motor for refrigerator - Google Patents
Isolation structure of motor for refrigeratorInfo
- Publication number
- JPH0968166A JPH0968166A JP24848695A JP24848695A JPH0968166A JP H0968166 A JPH0968166 A JP H0968166A JP 24848695 A JP24848695 A JP 24848695A JP 24848695 A JP24848695 A JP 24848695A JP H0968166 A JPH0968166 A JP H0968166A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing material
- refrigerator
- electric motor
- mica tape
- insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Organic Insulating Materials (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、代替フロン対応の冷凍
機用電動機の絶縁構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating structure for a refrigerator electric motor compatible with an alternative CFC.
【０００２】[0002]
【従来の技術】従来、冷凍機に使用される圧縮機を駆動
する電動機は圧縮機と回転軸によって直結され、密閉容
器の中にそれぞれ収納されており、ジクロルフルオロメ
タン（ＣＦＣ１２）などのフロン冷媒と相溶性の良い鉱
油系の潤滑油との混合冷媒が採用されていた。したがっ
て、電動機の巻線等も混合冷媒によって冷却される。ま
た、電動機の巻線は、ポリエステル系のワニスを塗布し
たマグネットワイヤを使用し、その表面に絶縁マイカテ
ープを巻線に巻付け、さらに補強材料として絶縁マイカ
テープにポリエチレンテレフタレート樹脂を含浸する
か、ポリエチレンテレフタレートのフィルムを巻きつけ
ている。ところで、近年、フロンによるオゾン層破壊の
問題によって、従来使用されていたＣＦＣ１２など冷媒
の代わりに、１．１．１−トリフルオロエタン（以下、
ＨＣＦＣ１２３という）や１．１．１．２−テトラフル
オロエタン（以下、ＨＦＣ１３４ａという）などが用い
られるようになった。しかし、従来の鉱油系の潤滑油は
ＨＣＦＣ１２３やＨＦＣ１３４ａとの相溶性が悪いた
め、ポリアルキレングリコール系や脂肪酸エステル系な
どの潤滑油を冷凍機油として使用するものが開示されて
いる（例えば、特開平５−２３６６９３号）。2. Description of the Related Art Conventionally, an electric motor for driving a compressor used in a refrigerator is directly connected to the compressor by a rotary shaft and housed in a hermetically sealed container, and a fluorocarbon such as dichlorofluoromethane (CFC12) is used. A mixed refrigerant of a refrigerant and a mineral oil-based lubricating oil having good compatibility has been adopted. Therefore, the windings of the electric motor are also cooled by the mixed refrigerant. For the winding of the electric motor, use a magnet wire coated with polyester varnish, wind an insulating mica tape on the surface of the winding, and further impregnate the insulating mica tape with polyethylene terephthalate resin as a reinforcing material. A polyethylene terephthalate film is wrapped around. By the way, in recent years, due to the problem of ozone layer depletion due to CFCs, 1.1.1-trifluoroethane (hereinafter,
HCFC123) and 1.1.1.2-tetrafluoroethane (hereinafter referred to as HFC134a) have come to be used. However, since conventional mineral oil-based lubricating oils have poor compatibility with HCFC123 and HFC134a, there have been disclosed ones in which a polyalkylene glycol-based or fatty acid ester-based lubricating oil is used as a refrigerating machine oil (see, for example, Japanese Patent Application Laid-Open No. Hei 10 (1999) -242242). 5-236693).
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記従来技
術では、冷凍機油として使用しているポリアルキレング
リコール系や脂肪酸エステル系などの合成潤滑油は吸湿
性が高いため、混合冷媒中に溶解している水分により、
従来のポリエチレンテレフタレートを使用した補強材料
が加水分解し、絶縁性能を低下させてしまうという問題
があった。本発明は、絶縁マイカテープの補強材料に耐
加水分解性の高い絶縁材料を用いることにより、代替フ
ロンと合成潤滑油との混合冷媒による絶縁マイカテープ
の絶縁性低下を防ぐ冷凍機用電動機の絶縁構造を提供す
ることを目的とするものである。However, in the above-mentioned prior art, since the synthetic lubricating oil such as polyalkylene glycol type or fatty acid ester type used as the refrigerating machine oil has high hygroscopicity, it is dissolved in the mixed refrigerant. Depending on the water content
There is a problem that the conventional reinforcing material using polyethylene terephthalate is hydrolyzed and the insulation performance is deteriorated. The present invention uses an insulating material having a high hydrolysis resistance as a reinforcing material for an insulating mica tape to prevent the insulation of the insulating mica tape from being deteriorated by a mixed refrigerant of a CFC substitute and a synthetic lubricating oil. It is intended to provide a structure.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、ポリアルキレングリコール系または脂肪
酸エステル系の冷凍機油と１．１．１−トリフルオロエ
タンまたは１．１．１−２．テトラフルオロエタンから
なる冷媒との混合冷媒を用い、巻線に絶縁マイカテープ
と補強材料が巻付けられ、かつ密閉容器の中に収納した
圧縮機を駆動する冷凍機用電動機の絶縁構造において、
前記補強材料が耐加水分解性の高い材料からなるもので
ある。また、前記補強材料が、ポリエチレンナフタレー
ト、芳香族ポリアミド、芳香族ポリイミド、ポリフェニ
レンサルファイド、ポリスルホン、ポリエーテルスルホ
ン、ポリエーテルイミド、ポリエーテルエーテルケト
ン、ポリアミドイミド、ポリテトラフルオロエチレン、
ポリテトラフルオロエチレンのコポリマー、ポリふっ化
ビニリジン、ポリパラバラバン酸、ポリアリレート、ポ
リエチレン２、６−ナフタレート、またはポリブチレン
ナフタレートのいずれか一つの材料からなるものであ
る。In order to solve the above-mentioned problems, the present invention provides a polyalkylene glycol-based or fatty acid ester-based refrigerating machine oil and 1.1.1-trifluoroethane or 1.1.1-2. Using a mixed refrigerant with a refrigerant consisting of tetrafluoroethane, an insulating mica tape and a reinforcing material are wound around the winding, and in the insulation structure of the electric motor for the refrigerator, which drives the compressor housed in a closed container,
The reinforcing material is made of a material having high hydrolysis resistance. Further, the reinforcing material, polyethylene naphthalate, aromatic polyamide, aromatic polyimide, polyphenylene sulfide, polysulfone, polyether sulfone, polyether imide, polyether ether ketone, polyamide imide, polytetrafluoroethylene,
It is made of any one material of a copolymer of polytetrafluoroethylene, polyvinylidene fluoride, polyparabarabanic acid, polyarylate, polyethylene 2,6-naphthalate or polybutylene naphthalate.
【０００５】[0005]
【作用】上記手段により、冷凍機用電動機の巻線の絶縁
に用いる絶縁マイカテープの補強材料として、ポリエチ
レンナフタレート、芳香族ポリアミド、芳香族ポリイミ
ドまたはポリフェニレンサルファイドなどの耐加水分解
性の高い材料を用いているので、混合冷媒中に溶解して
いる水分によって補強材料が加水分解することがなく、
運転中の電動機の巻線の絶縁破壊電圧の低下を防ぐこと
ができる。By the above means, a material having a high hydrolysis resistance such as polyethylene naphthalate, aromatic polyamide, aromatic polyimide or polyphenylene sulfide is used as a reinforcing material for the insulating mica tape used for insulating the winding of the electric motor for the refrigerator. Since it is used, the reinforcing material is not hydrolyzed by the water dissolved in the mixed refrigerant,
It is possible to prevent a decrease in the dielectric breakdown voltage of the winding of the electric motor during operation.
【０００６】[0006]
【実施例】以下、本発明を図に示す実施例について説明
する。図１は本発明の実施例の巻線の絶縁構造を示す断
面図である。図において、１は巻線、２はマグネットワ
イヤで、表面にポリエステルイミド系またはポリアミド
イミド系のワニスを塗布してある。３は絶縁マイカテー
プ層で、マイカ粉をエポキシ系樹脂によって結合してテ
ープ状に形成したマイカテープを、マグネットワイヤ２
の表面に所定回数全長に亙って巻回してある。４はマイ
カテープ層３の表面に塗布したエポキシ系の接着剤層、
５は補強材料層である。補強材料層５は耐加水分解性の
高いポリエチレンナフタレート、芳香族ポリアミド、芳
香族ポリイミドまたはポリフェニレンサルファイドをフ
ィルム状またはテープ状に形成して、マイカテープ層３
の表面に接着剤層４を介して巻付けてある。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an insulating structure of a winding wire according to an embodiment of the present invention. In the figure, 1 is a winding wire, 2 is a magnet wire, and a polyesterimide-based or polyamideimide-based varnish is applied on the surface. Indicated at 3 is an insulating mica tape layer, which is a mica tape formed by combining mica powder with an epoxy resin to form a tape.
It is wound on the surface of the product for a predetermined number of times over its entire length. 4 is an epoxy adhesive layer applied on the surface of the mica tape layer 3,
5 is a reinforcing material layer. The reinforcing material layer 5 is formed by forming polyethylene naphthalate, aromatic polyamide, aromatic polyimide or polyphenylene sulfide having a high hydrolysis resistance into a film shape or a tape shape to form the mica tape layer 3
It is wound around the surface of the via the adhesive layer 4.
【０００７】図２は、本発明の絶縁構造を備えた巻線と
従来のポリエチレンテレフタレートを補強材料とした絶
縁構造を備えた巻線とを、代替フロンの冷媒として用い
られるＨＦＣ１３４ａ，ＨＣＦＣ１２３と、それぞれに
用いるポリアルキレングリコール系や脂肪酸エステル系
などの冷凍機油との混合冷媒に浸漬した場合の絶縁破壊
特性の実験結果を示す。これによると、本発明の絶縁構
造を備えた巻線は、図２に実線で示すように、冷媒浸漬
試験後に絶縁破壊電圧は約１０％程度の低下しかしなか
ったが、従来の絶縁構造を備えた巻線は、破線で示すよ
うに、約７０％程度の低下となり、本発明の絶縁構造を
備えた巻線は、代替フロンと合成潤滑油との混合冷媒に
よる絶縁マイカテープの絶縁性低下を防ぐことが明らか
である。なお、上記実施例では補強材料として、ポリエ
チレンナフタレート、芳香族ポリアミド、芳香族ポリイ
ミドまたはポリフェニレンサルファイドを用いた例につ
いて説明したが、これ以外の耐加水分解性の高い材料と
して、ポリスルホン、ポリエーテルスルホン、ポリエー
テルイミド、ポリエーテルエーテルケトン、ポリアミド
イミド、ポリテトラフルオロエチレン、ポリテトラフル
オロエチレンのコポリマー、ポリふっ化ビニリジン、ポ
リパラバラバン酸、ポリアリレート、ポリエチレン２、
６−ナフタレート、またはポリブチレンナフタレートの
いずれか一つの材料を用いて同様の実験を行った。その
結果、前記すべての材料について、上記実施例で説明し
た図２に実線で示す結果とほぼ同様の結果が得られた。FIG. 2 shows a winding having the insulating structure of the present invention and a conventional winding having an insulating structure using polyethylene terephthalate as a reinforcing material, and HFC134a and HCFC123 used as refrigerants for CFC substitutes, respectively. The experimental results of the dielectric breakdown characteristics when immersed in a mixed refrigerant with a refrigerating machine oil such as a polyalkylene glycol type or a fatty acid ester type used for are shown below. According to this, as shown by the solid line in FIG. 2, the winding having the insulating structure of the present invention has a decrease in the dielectric breakdown voltage of about 10% after the refrigerant immersion test, but has the conventional insulating structure. As shown by the broken line, the winding has a reduction of about 70%, and the winding having the insulating structure of the present invention reduces the insulation of the insulating mica tape due to the mixed refrigerant of the CFC substitute and the synthetic lubricating oil. It is clear to prevent. In the above examples, the reinforcing material was described as an example using polyethylene naphthalate, aromatic polyamide, aromatic polyimide or polyphenylene sulfide, but as the other material having high hydrolysis resistance, polysulfone, polyether sulfone is used. , Polyetherimide, polyetheretherketone, polyamideimide, polytetrafluoroethylene, copolymer of polytetrafluoroethylene, poly (vinylidene fluoride), polyparabarabanic acid, polyarylate, polyethylene 2,
Similar experiments were conducted using either one of 6-naphthalate or polybutylene naphthalate. As a result, for all the above-mentioned materials, almost the same results as the results shown by the solid line in FIG.
【０００８】[0008]
【発明の効果】以上述べたように、本発明によれば、冷
凍機用電動機の巻線の絶縁に用いる絶縁マイカテープの
補強材料として、耐加水分解性の高い材料を用いている
ので、混合冷媒中に溶解している水分によって補強材料
が加水分解することがなく、運転中の電動機の巻線の絶
縁破壊電圧の低下を防ぐ、代替フロン対応の冷凍機用モ
ータの絶縁構造を提供できる効果がある。As described above, according to the present invention, a material having a high hydrolysis resistance is used as a reinforcing material for the insulating mica tape used for insulating the windings of the electric motor for the refrigerator, so that the mixing Effect of being able to provide an alternative CFC-compatible refrigerator motor insulation structure that prevents the reinforcing material from being hydrolyzed by the water dissolved in the refrigerant and prevents the breakdown voltage of the windings of the electric motor during operation from decreasing. There is.
【図１】 本発明の実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】 本発明の実施例の絶縁破壊特性の実験結果を
示すグラフである。FIG. 2 is a graph showing an experimental result of dielectric breakdown characteristics of an example of the present invention.
１：巻線、２：マグネットワイヤ、３：絶縁マイカテー
プ層、４：接着剤層、５：補強材料層1: winding, 2: magnet wire, 3: insulating mica tape layer, 4: adhesive layer, 5: reinforcing material layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０２Ｋ 5/12 Ｈ０２Ｋ 5/12 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical indication H02K 5/12 H02K 5/12
Claims (2)
酸エステル系の冷凍機油と１．１．１−トリフルオロエ
タンまたは１．１．１．２−テトラフルオロエタンから
なる冷媒との混合冷媒を用い、巻線に絶縁マイカテープ
と補強材料が巻付けられ、かつ密閉容器の中に収納した
圧縮機を駆動する冷凍機用電動機の絶縁構造において、
前記補強材料が耐加水分解性の高い材料からなることを
特徴とする冷凍機用電動機の絶縁構造。1. A winding using a mixed refrigerant of a polyalkylene glycol-based or fatty acid ester-based refrigerating machine oil and a refrigerant consisting of 1.1.1-trifluoroethane or 1.1.1.2-tetrafluoroethane. Insulating mica tape and reinforcing material are wrapped around, and in the insulating structure of the electric motor for the refrigerator that drives the compressor housed in a closed container,
An insulating structure for a refrigerator electric motor, wherein the reinforcing material is made of a material having high hydrolysis resistance.
ート、芳香族ポリアミド、芳香族ポリイミド、ポリフェ
ニレンサルファイド、ポリスルホン、ポリエーテルスル
ホン、ポリエーテルイミド、ポリエーテルエーテルケト
ン、ポリアミドイミド、ポリテトラフルオロエチレン、
ポリテトラフルオロエチレンのコポリマー、ポリふっ化
ビニリジン、ポリパラバラバン酸、ポリアリレート、ポ
リエチレン２、６−ナフタレート、またはポリブチレン
ナフタレートのいずれか一つの材料からなる請求項１記
載の冷凍機用電動機の絶縁構造。2. The reinforcing material is polyethylene naphthalate, aromatic polyamide, aromatic polyimide, polyphenylene sulfide, polysulfone, polyether sulfone, polyether imide, polyether ether ketone, polyamide imide, polytetrafluoroethylene,
2. The electric motor for a refrigerator according to claim 1, which is made of any one material of polytetrafluoroethylene copolymer, polyvinylidene fluoride, polyparabarabanic acid, polyarylate, polyethylene 2,6-naphthalate, and polybutylene naphthalate. Insulation structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24848695A JPH0968166A (en) | 1995-09-01 | 1995-09-01 | Isolation structure of motor for refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24848695A JPH0968166A (en) | 1995-09-01 | 1995-09-01 | Isolation structure of motor for refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0968166A true JPH0968166A (en) | 1997-03-11 |
Family
ID=17178884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24848695A Pending JPH0968166A (en) | 1995-09-01 | 1995-09-01 | Isolation structure of motor for refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0968166A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1031610A4 (en) * | 1998-09-04 | 2000-11-22 | Idemitsu Petrochemical Co | Polyarylene sulfide resin composition and part for use in contact with refrigerant |
| GB2371089A (en) * | 1999-10-01 | 2002-07-17 | Scroll Tech | Reduced height sealed compressor and incorporation of suction tube |
-
1995
- 1995-09-01 JP JP24848695A patent/JPH0968166A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1031610A4 (en) * | 1998-09-04 | 2000-11-22 | Idemitsu Petrochemical Co | Polyarylene sulfide resin composition and part for use in contact with refrigerant |
| GB2371089A (en) * | 1999-10-01 | 2002-07-17 | Scroll Tech | Reduced height sealed compressor and incorporation of suction tube |
| GB2371089B (en) * | 1999-10-01 | 2005-04-13 | Scroll Tech | Reduced height sealed compressor and incorporation of suction tube |
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