JP3598132B2 - Hermetic compressor - Google Patents

Hermetic compressor Download PDF

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JP3598132B2
JP3598132B2 JP17418894A JP17418894A JP3598132B2 JP 3598132 B2 JP3598132 B2 JP 3598132B2 JP 17418894 A JP17418894 A JP 17418894A JP 17418894 A JP17418894 A JP 17418894A JP 3598132 B2 JP3598132 B2 JP 3598132B2
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Prior art keywords
compressor
refrigerant gas
motor
hermetic
introduction path
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JPH0835496A (en
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弘一 島田
幸二 漆原
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カルソニックコンプレッサー株式会社
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Description

【0001】
【産業上の利用分野】
この発明は冷凍機あるいは車両のエアコンシステム等に用いられる密閉型圧縮機に関する。
【0002】
【従来の技術】
従来より、この種の密閉型圧縮機は密閉ケース内に圧縮機部と電動機とを内蔵し、電動機の起動により圧縮機部を作動させ、圧縮機部において冷媒ガスを圧縮する。
【0003】
このような密閉型圧縮機においては、電動機の能力を最大限に発揮させる手段として、電動機の周部に冷媒ガスの導入路を設け、この導入路を通過する圧縮前の冷媒ガスにより電動機を冷却する構成が採用されており、この種の冷却手段の構成は特開平4−112990号公報または特開平5−113188号公報にも記載されている。
【0004】
【発明が解決しようとする課題】
しかしながら、上記のような従来の密閉型圧縮機にあっては、冷媒ガスが電動機の熱を奪い加熱されながら導入路を流れるものであるため、導入路の下流では上流よりも冷媒ガスの温度が比較的高くなることは避けられない。このため導入路の下流側では冷媒ガスによる電動機の冷却が充分になされず、また導入路の下流側には熱源となる圧縮機部が位置することから、特に電動機の導入路下流側が高温になり、電動機全体の温度が不均一となるとともに、熱による電動機のトラブル、例えば効率および耐久性の低下、あるいはオーバーヒート等が生じる等の不具合がある。
【0005】
また、従来の密閉型圧縮機においては、高温である吐出室側の熱が密閉ケースを経て電動機に到達し、電動機の温度をより一層上昇させることも、上記のような電動機のトラブルを招く原因の一つとして挙げられている。
【0006】
この発明は上述の事情に鑑みてなされたもので、その目的とするところは熱による電動機のトラブルを防止した信頼性の高い密閉型圧縮機を提供することにある。
【0007】
【課題を解決するための手段】
上記目的を達成するために、請求項1記載の発明は密閉ケース内に、冷媒ガスを圧縮するための圧縮機部と、この圧縮機部を作動させるための電動機とを内蔵し、かつ電動機の周部に冷媒ガスの導入路を備える密閉型圧縮機において、上記圧縮機部から密閉ケースを経て電動機に至るまでの途中に断熱材を介挿したことを特徴とする。
【0008】
請求項2記載の発明は圧縮機部と電動機との間に断熱材を配置したことを特徴とする。
【0009】
請求項3記載の発明は密閉ケースと電動機との間に断熱材を配置したことを特徴とする。
【0010】
請求項4記載の発明は密閉ケース内に、冷媒ガスを圧縮するための圧縮機部と、この圧縮機部を作動させるための電動機とを内蔵し、かつ電動機の周部に冷媒ガスの導入路を備える密閉型圧縮機において、上記圧縮機部と電動機との間に放熱部を設けたことを特徴とする。
【0011】
請求項5記載の発明は密閉ケース内に、冷媒ガスを圧縮するための圧縮機部と、この圧縮機部を作動させるための電動機とを内蔵し、かつ電動機の周部に冷媒ガスの導入路を備える密閉型圧縮機において、上記導入路に、その上流側では冷媒ガスを速く通過させる一方、下流側では冷媒ガスを遅く通過させるためのガス流速変更部を設けたことを特徴とする。
【0012】
請求項6記載の発明は密閉ケース内に、冷媒ガスを圧縮するための圧縮機部と、この圧縮機部を作動させるための電動機とを内蔵し、かつ電動機の動力を圧縮機部側に伝達するための駆動シャフト内に冷媒ガスの導入路を形成した密閉型圧縮機において、上記導入路に、その上流側では冷媒ガスを速く通過させる一方、下流側では冷媒ガスを遅く通過させるためのガス流速変更部を設けたことを特徴とする。
【0013】
請求項7記載の発明はガス流速変更部として導入路の内側にテーパー部を設けたことを特徴とする。
【0014】
請求項8記載の発明はガス流速変更部として導入路の内側に段部を設けたことを特徴とする。
【0015】
【作用】
請求項1ないし3記載の発明では、圧縮機部側から密閉ケースを介して電動機側に伝達される余分な熱が断熱材により遮断される。
【0016】
請求項4記載の発明によると、密閉ケースを介して電動機側に移行しようとする圧縮機部側の熱は放熱部を通過するとき外部に放出される。
【0017】
請求項5ないし8記載の発明では、導入路の下流側では上流側より冷媒ガスの流れが遅く、冷媒ガスによる冷却効率が高くなる。このため冷媒ガスの温度が比較的高く、冷媒ガスによる冷却が十分になされず、圧縮機部の熱の影響を特に受けるとして従来より問題となっていた部分、すなわち電動機の導入路下流側をよく冷やすことができる。
【0018】
【実施例】
以下、この発明に係る密閉型圧縮機の実施例について図1ないし図6を用いて詳細に説明する。
【0019】
この密閉型圧縮機は図1に示すような密閉ケース1を有し、密閉ケース1内には圧縮機部2および電動機3が配設されている。
【0020】
密閉ケース1は両端開口筒型の中央ケース100と、この中央ケース100の両開口端面にそれぞれ取り付けたサイドケース101,102から構成されており、一方のサイドケース101内は圧縮機部2を収納する圧縮機室として、また他方のサイドケース102および中央ケース100内は電動機3を収納する電動機室として設けられている。
【0021】
圧縮機部2はいわゆる周知のベーンロータリー型圧縮機と同様の構成が採用されている。
【0022】
すなわち、圧縮機部2は図2に示すような内周楕円状のシリンダ200を具備し、シリンダ200の両端面にはサイドブロック201,202が取り付けられており(図1参照)、シリンダ200内にはロータ203が回転可能に配設されている。
【0023】
ロータ203には径方向にベーン溝203a,203a…が形成され、またベーン溝203a,203a…にはベーン204,204…が装着されており、ベーン204,204…はロータ203の外周面からシリンダ200の内壁に向かって進退移動でき、かつ所定の付勢力によりシリンダ200の内壁側に付勢される。なお、この種の付勢力はベーン204底部の背圧とロータ203の遠心力とにより得られ、またベーン204底部の背圧はベーン溝203aに供給される潤滑油により発生する。
【0024】
ロータ203の軸心には図1に示すように駆動シャフト4が一体に設けられており、駆動シャフト4の一部はサイドブロック201,202の軸受部201a,202aにより回転可能に支持されている。
【0025】
このような圧縮機部2では、駆動シャフト4を介しロータ203を回転させると、シリンダ200、サイドブロック201,202、ロータ203、ベーン204,204…により仕切られる圧縮作業室a,a…の容量が変化し、この容量変化により冷媒ガスを圧縮する。
【0026】
電動機3は回転子300およびこれに対向する固定子301を備え、回転子300は駆動シャフト4の外周面に一体に取り付けられている一方、固定子301は取付金具等を介して密閉ケース1側に固定されており、この電動機3は固定子301側に電力を供給すると駆動シャフト4を回転させることができる。
【0027】
電動機3の周部には冷媒ガスの導入路5が形成されており、導入路5の上流側5aは密閉ケース1の吸入口1aに連通し、また導入路5の下流側5bは圧縮機部2と電動機3の間に設けた吸気室d、およびサイドブロック201の吸入連絡穴201bを介してシリンダ200内に連通するように設けられている。
【0028】
圧縮機部2から密閉ケース1を経て電動機3に至るまでの途中にはシート状の断熱材6が配設されている。
【0029】
断熱材6は圧縮機部2と電動機3の間に設けた吸気室bに位置し、かつ圧縮機部2のサイドブロック201の表面に密着するように設けられており、また断熱材6の周縁部は中央ケース100とサイドケース101との間に挾まれ密着固定されている。つまり、断熱材6は、圧縮機部2から密閉ケース1のサイドケース101、中央ケース100を経て電動機3に至るまでの途中に介挿された断熱材と、圧縮機部2と電動機3との間に配置した第2の断熱材とからなっている。
【0030】
なお、断熱材6には導入路5側と連絡口201b側とを連通させるための開口部6aが設けられている。
【0031】
次に、上記の如く構成された密閉型圧縮機の動作について図1および図2を用いて説明する。
【0032】
この密閉型圧縮機によれば、電動機3の起動により駆動シャフト4と一体にロータ203が回転すると、圧縮作業室a,a…の容量が変化し、この容量変化により冷媒ガスが圧縮される。
【0033】
なお、圧縮前の低圧の冷媒ガスは図中実線矢印で示すように吸入口1aから導入路5、吸気室b、断熱材6の開口部6aおよび連絡路201bを通過して圧縮作業室a,a…に導かれる。
【0034】
また、圧縮後の高圧の冷媒ガスは図中破線矢印で示すようにシリンダ200の吐出ポート200a,200a、吐出弁200b,200b、およびサイドブロック202の吐出連絡穴(図示省略)、およびサイドブロック202の後部に設けた油分離器205を経て吐出室cに吐出し、その後吐出口1bに至る。
【0035】
この際、圧縮後の高圧の冷媒ガスは圧縮時に高温となり、圧縮機部2および吐出室c側の温度を上昇させる。
【0036】
そして、圧縮機部2および吐出室c側の熱の一部は密閉ケース1を介し電動機3側に移行しようとするが、この熱は電動機3側に伝達される前に断熱材6により遮断される。
【0037】
以上のように、本実施例の密閉型圧縮機にあっては圧縮機部2および吐出室c側から密閉ケース1を介して電動機3側に伝達される余分な熱を断熱材6で遮断するように構成したものであるため、この種の熱による電動機3の温度上昇を防止でき、熱による電動機3のトラブル、例えば効率および耐久性の低下、あるいはオーバーヒート等を未然に回避することができる。
【0038】
本実施例では断熱材6を圧縮機部2と電動機3の境に配置したが、断熱材6は図3に示すように密閉ケース1と電動機3との間に配置してもよく、この場合には断熱材6を筒状に形成し、この筒状断熱材6の内側に電動機3の固定子301を収納設置する。
【0039】
このように断熱材6を配置しても、圧縮機部2および吐出室c側から密閉ケース1を介して電動機3側に伝達される余分な熱が断熱材6で遮断されることから、この種の熱による電動機3の温度上昇を防止でき、熱による電動機3のトラブルを回避することができる。
【0040】
図4はこの発明の他の実施例を示すもので、同図に示す密閉型圧縮機の基本構成、即ち密閉ケース1内に、冷媒ガスを圧縮するための圧縮機部2と、この圧縮機部2を作動させるための電動機3とを内蔵すること、および電動機3の周部に冷媒ガスの導入路5を備えること等は上記実施例と同様なため、その詳細説明は省略する。
【0041】
同図に示す密閉型圧縮機は放熱部として密閉ケース1の一部に窪み部7が形成されており、窪み部7は圧縮機部2と電動機3との間に設けられ、この間での密閉ケース1の表面積を拡大し、外界との熱交換率を向上させるものである。
【0042】
このような構成の密閉型圧縮機によると、密閉ケース1を介して電動機3側に移行しようとする圧縮機部2および吐出室c側の熱は窪み部7を通過するとき外部に放出される。このため最終的に電動機3側に至る熱が可及的に減少し、この種の熱による電動機3の温度上昇および電動機3のトラブルを防止することができる。
【0043】
図5はこの発明の他の実施例を示すもので、同図に示す密閉型圧縮機の基本構成は上記実施例と同様なため、その詳細説明は省略する。
【0044】
同図に示す密閉型圧縮機はガス流速変更部として導入路5内にテーパー部8を具備し、テーパー部8は導入路5の上流側5aから下流側5bに向かって次第に広がるように形成されており、このテーパ部7により導入路5内の冷媒ガスは上流側5aでは速く、下流側5bでは遅く流れるように設定されている。
【0045】
このような構成の密閉型圧縮機によると、導入路5の下流側5bでは上流側5aより冷媒ガスの流れが遅く、このため冷媒ガスによる冷却効率が高くなることから、圧縮機部2の熱の影響を特に受ける部分、すなわち電動機3の導入路下流側をよく冷やすことができ、電動機3の温度を均一とすることが可能となるとともに、熱による電動機3のトラブルを未然に防止することができる。
【0046】
本実施例ではガス流速変更部としてテーパー部8を設けたが、これに代えて図6に示すような段部9,9を設けてもよく、段部9,9を設ける場合には当該段部9,9を境に導入路5の下流側5bが上流側5aより大径となるように形成する。
【0047】
このように段部9,9を形成すると、テーパー部8の場合と同様に、導入路5内の冷媒ガスは上流側5aでは速く、下流側5bでは遅く流れるように設定されるので、テーパー部8を設けた場合と同様な効果が得られる。
【0048】
図7はこの発明の他の実施例を示すもので、同図に示す密閉型圧縮機は図1等に示すような導入路5を駆動シャフト4内に形成するとともに、その導入路5内にガス流速変更部としてテーパー部8を設けたものである。
【0049】
本実施例のテーパー部8も上記実施例と同じく導入路5の上流側5aから下流側5bに向かって次第に広がるように形成されており、これにより導入路5内の冷媒ガスは上流側5aでは速く、また下流側5bでは遅く流れるように設定される。
【0050】
なお、密閉ケース1内に、冷媒ガスを圧縮するための圧縮機部2と、この圧縮機部2を作動させるための電動機3とを内蔵すること等は上記実施例と同様であるため、その詳細説明は省略する。
【0051】
このような構成の密閉型圧縮機においても、導入路5の下流側5bでは上流側5aより冷媒ガスの流れが遅く、冷媒ガスによる冷却効率が高くなる。このため冷媒ガスの温度が比較的高く、冷媒ガスによる冷却が十分になされず、圧縮機部の熱の影響を特に受けるとして従来より問題となっていた部分、すなわち電動機の導入路下流側をよく冷やすことができ、電動機3の温度を均一とすることが可能となるとともに、熱による電動機3のトラブルを未然に防止することができる。
【0052】
本実施例ではガス流速変更部としてテーパー部8を設けたが、これに代えて図6に示すような段部9,9を駆動シャフト4内に形成しても上記と同様な効果が得られる。
【0053】
なお、上記各実施例は断熱材6およびガス流速変更部のいずれか一方を具備するものであるが、この断熱材6とガス流速変更部の両者を密閉型圧縮機に設けてもよいことは勿論である。
【0054】
上記実施例では圧縮機部2をベーンロータリー型圧縮機として構成したが、この圧縮機部2については例えばローリングピストン型等、各種形式の圧縮機を適用することができる。
【0055】
【発明の効果】
請求項1ないし3記載の発明にあっては、圧縮機部側から密閉ケースを介して電動機側に伝達される余分な熱を断熱材で遮断するように構成したものであるため、この種の熱による電動機の温度上昇を防止でき、熱による電動機のトラブル、例えば効率および耐久性の低下、あるいはオーバーヒート等を未然に回避することができる。
【0056】
請求項4記載の発明にあっては、圧縮機部と電動機との間に放熱部を設けたため、密閉ケースを介して電動機側に移行しようとする圧縮機部側の熱は放熱部を通過するとき外部に放出され、最終的に電動機側に至る熱が可及的に減少することから、この種の熱による電動機の温度上昇および電動機のトラブルを防止することができる。
【0057】
請求項5ないし8記載の発明によると、導入路の下流側では上流側より冷媒ガスの流れが遅く、冷媒ガスによる冷却効率が高くなるように構成したものである。このため冷媒ガスの温度が比較的高く、冷媒ガスによる冷却が十分になされず、圧縮機部の熱の影響を特に受けるとして従来より問題となっていた部分、すなわち電動機の導入路下流側をよく冷やすことができ、電動機の温度を均一とすることが可能となるとともに、熱による電動機のトラブルを未然に防止することができる。
【図面の簡単な説明】
【図1】この発明の一実施例を示す断面図。
【図2】図1に示すII−II線断面図。
【図3】この発明の他の実施例の要部を示す断面図。
【図4】この発明の他の実施例の要部を示す断面図。
【図5】この発明の他の実施例の要部を示す断面図。
【図6】この発明の他の実施例の要部を示す断面図。
【図7】この発明の他の実施例の要部を示す断面図。
【符号の説明】
1 密閉ケース
2 圧縮機部
3 電動機
4 駆動シャフト
5 導入路
6 断熱材
7 窪み部(放熱部)
8 テーパー部(ガス流速変更部)
9 段部(ガス流速変更部)
[0001]
[Industrial applications]
The present invention relates to a hermetic compressor used for a refrigerator or an air conditioner system of a vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, this type of hermetic compressor has a compressor section and an electric motor built in a hermetically sealed case, and operates the compressor section by starting the electric motor to compress refrigerant gas in the compressor section.
[0003]
In such hermetic compressors, as a means for maximizing the performance of the electric motor, a refrigerant gas introduction passage is provided around the periphery of the electric motor, and the electric motor is cooled by the refrigerant gas before compression passing through the introduction passage. The configuration of this type of cooling means is also described in JP-A-4-112990 or JP-A-5-113188.
[0004]
[Problems to be solved by the invention]
However, in the conventional hermetic compressor as described above, since the refrigerant gas flows through the introduction path while being heated by depriving the heat of the motor, the temperature of the refrigerant gas is lower at the downstream of the introduction path than at the upstream. Relatively high is inevitable. For this reason, the cooling of the motor by the refrigerant gas is not sufficiently performed on the downstream side of the introduction path, and the compressor section serving as a heat source is located on the downstream side of the introduction path. In addition, the temperature of the entire electric motor becomes non-uniform, and there are problems such as trouble of the electric motor due to heat, for example, reduction in efficiency and durability, overheating, and the like.
[0005]
Also, in the conventional hermetic compressor, the heat of the discharge chamber, which is high temperature, reaches the motor through the hermetic case, and further increases the temperature of the motor. It is listed as one of the.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a highly reliable hermetic compressor in which a trouble of an electric motor due to heat is prevented.
[0007]
[Means for Solving the Problems]
Means for Solving the Problems To achieve the above object, the invention according to claim 1 incorporates, in a closed case, a compressor unit for compressing refrigerant gas and a motor for operating the compressor unit, and In a hermetic compressor having a refrigerant gas introduction path in a peripheral portion, a heat insulating material is interposed midway from the compressor section to a motor through a hermetic case.
[0008]
The invention according to claim 2 is characterized in that a heat insulating material is arranged between the compressor section and the electric motor.
[0009]
The invention according to claim 3 is characterized in that a heat insulating material is arranged between the closed case and the electric motor.
[0010]
According to a fourth aspect of the present invention, a compressor portion for compressing the refrigerant gas and a motor for operating the compressor portion are built in the closed case, and a refrigerant gas introduction passage is provided around the motor. Wherein a heat radiating section is provided between the compressor section and the electric motor.
[0011]
According to a fifth aspect of the present invention, a compressor portion for compressing the refrigerant gas and a motor for operating the compressor portion are built in the closed case, and a refrigerant gas introduction passage is provided around the motor. In the hermetic-type compressor provided with the above, the introduction path is provided with a gas flow rate changing portion for allowing the refrigerant gas to pass quickly on the upstream side and for allowing the refrigerant gas to pass slowly on the downstream side.
[0012]
According to a sixth aspect of the present invention, a compressor portion for compressing the refrigerant gas and a motor for operating the compressor portion are incorporated in the closed case, and the power of the motor is transmitted to the compressor portion side. In the hermetic compressor in which a refrigerant gas introduction path is formed in a drive shaft for performing the above operation, a gas for allowing the refrigerant gas to pass quickly on the upstream side and for allowing the refrigerant gas to pass slowly on the downstream side is provided in the introduction path. It is characterized in that a flow velocity changing unit is provided.
[0013]
The invention according to claim 7 is characterized in that a tapered portion is provided inside the introduction path as the gas flow rate changing portion.
[0014]
The invention according to claim 8 is characterized in that a step portion is provided inside the introduction path as the gas flow rate changing portion.
[0015]
[Action]
According to the first to third aspects of the present invention, excess heat transmitted from the compressor section side to the electric motor side via the closed case is blocked by the heat insulating material.
[0016]
According to the fourth aspect of the invention, the heat of the compressor section which is going to move to the motor side via the closed case is released to the outside when passing through the heat radiating section.
[0017]
In the invention according to claims 5 to 8, the flow of the refrigerant gas is slower on the downstream side of the introduction path than on the upstream side, and the cooling efficiency by the refrigerant gas is higher. For this reason, the temperature of the refrigerant gas is relatively high, the cooling by the refrigerant gas is not sufficiently performed, and the portion which has been a problem as compared with the related art as being particularly affected by the heat of the compressor portion, that is, the downstream side of the introduction path of the electric motor is often improved. Can be cooled.
[0018]
【Example】
Hereinafter, an embodiment of a hermetic compressor according to the present invention will be described in detail with reference to FIGS.
[0019]
The hermetic compressor has a hermetic case 1 as shown in FIG. 1, in which a compressor section 2 and an electric motor 3 are disposed.
[0020]
The closed case 1 is composed of a cylindrical central case 100 having both ends open, and side cases 101 and 102 attached to both open end faces of the central case 100, respectively. The inside of the other side case 102 and the center case 100 is provided as a motor room for housing the motor 3.
[0021]
The compressor unit 2 employs the same configuration as a so-called well-known vane rotary type compressor.
[0022]
That is, the compressor section 2 includes an inner peripheral elliptical cylinder 200 as shown in FIG. 2, and side blocks 201 and 202 are attached to both end surfaces of the cylinder 200 (see FIG. 1). , A rotor 203 is rotatably disposed.
[0023]
Are formed in the rotor 203 in the radial direction, and vanes 204, 204 are mounted in the vane grooves 203a, 203a, and the vanes 204, 204,. The cylinder 200 can move forward and backward toward the inner wall of the cylinder 200 and is urged toward the inner wall of the cylinder 200 by a predetermined urging force. This kind of urging force is obtained by the back pressure at the bottom of the vane 204 and the centrifugal force of the rotor 203, and the back pressure at the bottom of the vane 204 is generated by lubricating oil supplied to the vane groove 203a.
[0024]
As shown in FIG. 1, a drive shaft 4 is provided integrally with the axis of the rotor 203, and a part of the drive shaft 4 is rotatably supported by bearings 201a and 202a of the side blocks 201 and 202. .
[0025]
In such a compressor section 2, when the rotor 203 is rotated via the drive shaft 4, the capacity of the compression working chambers a, a ... divided by the cylinder 200, the side blocks 201, 202, the rotor 203, the vanes 204, 204 ... Changes, and the refrigerant gas is compressed by the change in capacity.
[0026]
The electric motor 3 includes a rotor 300 and a stator 301 opposed thereto. The rotor 300 is integrally attached to the outer peripheral surface of the drive shaft 4, while the stator 301 is attached to the sealed case 1 via a mounting bracket or the like. The electric motor 3 can rotate the drive shaft 4 when supplying electric power to the stator 301 side.
[0027]
A refrigerant gas introduction path 5 is formed around the electric motor 3. An upstream side 5 a of the introduction path 5 communicates with a suction port 1 a of the sealed case 1, and a downstream side 5 b of the introduction path 5 is a compressor section. It is provided so as to communicate with the cylinder 200 via an intake chamber d provided between the motor 2 and the electric motor 3 and an intake communication hole 201b of the side block 201.
[0028]
A sheet-like heat insulating material 6 is provided on the way from the compressor section 2 to the electric motor 3 via the closed case 1.
[0029]
The heat insulating material 6 is located in an intake chamber b provided between the compressor unit 2 and the electric motor 3, and is provided so as to be in close contact with the surface of the side block 201 of the compressor unit 2. The part is sandwiched and fixed between the central case 100 and the side case 101. That is, the heat insulating material 6 is provided between the compressor unit 2 and the electric motor 3 through the side case 101 of the closed case 1, the central case 100, and the electric motor 3. It is composed of a second heat insulating material disposed therebetween.
[0030]
In addition, the heat insulating material 6 is provided with an opening 6a for communicating the introduction path 5 side and the communication port 201b side.
[0031]
Next, the operation of the hermetic compressor configured as described above will be described with reference to FIGS.
[0032]
According to this hermetic compressor, when the rotor 203 rotates integrally with the drive shaft 4 by the activation of the electric motor 3, the capacity of the compression working chambers a, a ... changes, and the refrigerant gas is compressed by the change in capacity.
[0033]
Note that the low-pressure refrigerant gas before compression passes through the introduction path 5, the suction chamber b, the opening 6a of the heat insulating material 6, and the communication path 201b from the suction port 1a as shown by the solid arrow in the drawing, and the compression work chamber a, a.
[0034]
The compressed high-pressure refrigerant gas is supplied to the discharge ports 200a, 200a, the discharge valves 200b, 200b of the cylinder 200, the discharge communication holes (not shown) of the side block 202, and the side block 202, as indicated by broken arrows in the figure. The oil is discharged into the discharge chamber c via the oil separator 205 provided at the rear of the discharge port c, and thereafter reaches the discharge port 1b.
[0035]
At this time, the high-pressure refrigerant gas after compression has a high temperature during compression, and raises the temperature of the compressor section 2 and the discharge chamber c side.
[0036]
Then, part of the heat on the compressor section 2 and the discharge chamber c side tends to transfer to the electric motor 3 via the closed case 1, but this heat is blocked by the heat insulating material 6 before being transmitted to the electric motor 3 side. You.
[0037]
As described above, in the hermetic compressor of the present embodiment, the surplus heat transmitted from the compressor section 2 and the discharge chamber c side to the electric motor 3 via the closed case 1 is blocked by the heat insulating material 6. With such a configuration, it is possible to prevent the temperature of the electric motor 3 from rising due to this kind of heat, and to avoid a trouble of the electric motor 3 due to heat, such as a decrease in efficiency and durability, or overheating.
[0038]
In this embodiment, the heat insulating material 6 is arranged at the boundary between the compressor unit 2 and the electric motor 3, but the heat insulating material 6 may be arranged between the closed case 1 and the electric motor 3 as shown in FIG. The heat insulating material 6 is formed in a cylindrical shape, and the stator 301 of the electric motor 3 is housed and installed inside the cylindrical heat insulating material 6.
[0039]
Even if the heat insulating material 6 is arranged in this manner, since the excess heat transmitted from the compressor section 2 and the discharge chamber c side to the electric motor 3 via the closed case 1 is blocked by the heat insulating material 6, It is possible to prevent the temperature of the electric motor 3 from rising due to some kinds of heat, and to avoid trouble of the electric motor 3 due to the heat.
[0040]
FIG. 4 shows another embodiment of the present invention. The basic structure of the hermetic compressor shown in FIG. 4, that is, a compressor section 2 for compressing refrigerant gas in a hermetic case 1 and this compressor Since the electric motor 3 for operating the unit 2 and the provision of the refrigerant gas introduction path 5 around the electric motor 3 are similar to those of the above-described embodiment, the detailed description thereof is omitted.
[0041]
The hermetic compressor shown in FIG. 1 has a recess 7 formed in a part of the sealed case 1 as a heat radiating portion, and the recess 7 is provided between the compressor section 2 and the electric motor 3, and the hermetic seal is provided therebetween. This is to increase the surface area of the case 1 and improve the heat exchange rate with the outside world.
[0042]
According to the hermetic-type compressor having such a configuration, the heat of the compressor portion 2 and the discharge chamber c which is going to move to the electric motor 3 side through the hermetic case 1 is released to the outside when passing through the hollow portion 7. . For this reason, the heat finally reaching the motor 3 side is reduced as much as possible, and it is possible to prevent the temperature rise of the motor 3 and the trouble of the motor 3 due to this kind of heat.
[0043]
FIG. 5 shows another embodiment of the present invention. Since the basic structure of the hermetic compressor shown in FIG. 5 is the same as that of the above embodiment, detailed description thereof will be omitted.
[0044]
The hermetic compressor shown in the figure has a tapered portion 8 in the introduction passage 5 as a gas flow rate changing portion, and the tapered portion 8 is formed so as to gradually expand from the upstream side 5a of the introduction passage 5 toward the downstream side 5b. Due to the tapered portion 7, the refrigerant gas in the introduction path 5 is set to flow faster on the upstream side 5a and flow slowly on the downstream side 5b.
[0045]
According to the hermetic compressor having such a configuration, the flow of the refrigerant gas is slower on the downstream side 5b of the introduction path 5 than on the upstream side 5a, and the cooling efficiency by the refrigerant gas is higher. In particular, it is possible to cool the portion particularly affected by the above, that is, the downstream side of the introduction path of the motor 3, to make the temperature of the motor 3 uniform, and to prevent trouble of the motor 3 due to heat. it can.
[0046]
In the present embodiment, the tapered portion 8 is provided as the gas flow rate changing portion. However, instead of the tapered portion 8, steps 9 as shown in FIG. 6 may be provided. The downstream side 5b of the introduction path 5 is formed so as to have a larger diameter than the upstream side 5a with the parts 9, 9 as boundaries.
[0047]
When the steps 9 and 9 are formed in this manner, the refrigerant gas in the introduction path 5 is set so as to flow faster on the upstream side 5a and flow slowly on the downstream side 5b, similarly to the case of the taper section 8, so that the taper section The same effect as in the case where 8 is provided can be obtained.
[0048]
FIG. 7 shows another embodiment of the present invention. In the hermetic compressor shown in FIG. 7, an introduction path 5 as shown in FIG. A tapered portion 8 is provided as a gas flow rate changing portion.
[0049]
The tapered portion 8 of the present embodiment is also formed so as to gradually expand from the upstream side 5a to the downstream side 5b of the introduction path 5 similarly to the above-described embodiment, so that the refrigerant gas in the introduction path 5 is It is set to flow fast and to flow slowly on the downstream side 5b.
[0050]
Since the compressor unit 2 for compressing the refrigerant gas and the electric motor 3 for operating the compressor unit 2 are incorporated in the closed case 1 as in the above embodiment, Detailed description is omitted.
[0051]
Also in the hermetic compressor having such a configuration, the flow of the refrigerant gas is slower on the downstream side 5b of the introduction path 5 than on the upstream side 5a, and the cooling efficiency by the refrigerant gas is higher. For this reason, the temperature of the refrigerant gas is relatively high, the cooling by the refrigerant gas is not sufficiently performed, and the portion which has been a problem as compared with the related art as being particularly affected by the heat of the compressor portion, that is, the downstream side of the introduction path of the electric motor is often improved. The motor 3 can be cooled, the temperature of the electric motor 3 can be made uniform, and trouble of the electric motor 3 due to heat can be prevented.
[0052]
In this embodiment, the tapered portion 8 is provided as the gas flow speed changing portion. However, instead of this, the steps 9 and 9 as shown in FIG. .
[0053]
In each of the above embodiments, one of the heat insulating material 6 and the gas flow rate changing unit is provided. However, both the heat insulating material 6 and the gas flow rate changing unit may be provided in the hermetic compressor. Of course.
[0054]
In the above embodiment, the compressor unit 2 is configured as a vane rotary type compressor, but various types of compressors such as a rolling piston type can be applied to the compressor unit 2.
[0055]
【The invention's effect】
According to the first to third aspects of the present invention, since the excess heat transmitted from the compressor section side to the electric motor side via the sealed case is blocked by the heat insulating material, this kind of the invention is provided. A rise in the temperature of the motor due to heat can be prevented, and troubles in the motor due to heat, such as a reduction in efficiency and durability, or overheating can be avoided.
[0056]
According to the fourth aspect of the present invention, since the heat radiating section is provided between the compressor section and the electric motor, heat of the compressor section which is going to move to the electric motor side through the closed case passes through the heat radiating section. At this time, since the heat released to the outside and finally reaching the motor side is reduced as much as possible, it is possible to prevent the temperature rise of the motor and the trouble of the motor due to this kind of heat.
[0057]
According to the invention of claims 5 to 8, the flow of the refrigerant gas is slower on the downstream side of the introduction path than on the upstream side, and the cooling efficiency by the refrigerant gas is higher. For this reason, the temperature of the refrigerant gas is relatively high, the cooling by the refrigerant gas is not sufficiently performed, and the portion which has been a problem as compared with the related art as being particularly affected by the heat of the compressor portion, that is, the downstream side of the introduction path of the electric motor is often improved. The motor can be cooled, the temperature of the motor can be made uniform, and trouble of the motor due to heat can be prevented.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of the present invention.
FIG. 2 is a sectional view taken along line II-II shown in FIG.
FIG. 3 is a sectional view showing a main part of another embodiment of the present invention.
FIG. 4 is a sectional view showing a main part of another embodiment of the present invention.
FIG. 5 is a sectional view showing a main part of another embodiment of the present invention.
FIG. 6 is a sectional view showing a main part of another embodiment of the present invention.
FIG. 7 is a sectional view showing a main part of another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sealing case 2 Compressor part 3 Electric motor 4 Drive shaft 5 Introductory path 6 Insulation material 7 Depression part (radiation part)
8 Tapered part (gas flow rate changing part)
9 steps (gas flow rate changing part)

Claims (8)

密閉ケース内に、冷媒ガスを圧縮するための圧縮機部と、この圧縮機部を作動させるための電動機とを内蔵し、かつ電動機の周部に冷媒ガスの導入路を備える密閉型圧縮機において、
上記圧縮機部から密閉ケースを経て電動機に至るまでの途中に断熱材を介挿したことを特徴とする密閉型圧縮機。
In a hermetic case, a compressor part for compressing the refrigerant gas and a motor for operating the compressor part are built in, and a hermetic compressor having a refrigerant gas introduction path around the motor. ,
A hermetic compressor characterized in that a heat insulating material is interposed from the compressor section to a motor through a hermetic case.
圧縮機部と電動機との間に更に第2の断熱材を配置したことを特徴とする請求項1記載の密閉型圧縮機。The hermetic compressor according to claim 1, wherein a second heat insulating material is further disposed between the compressor section and the electric motor. 密閉ケースと電動機との間に断熱材を配置したことを特徴とする請求項1記載の密閉型圧縮機。2. The hermetic compressor according to claim 1, wherein a heat insulating material is disposed between the hermetic case and the electric motor. 密閉ケース内に、冷媒ガスを圧縮するための圧縮機部と、この圧縮機部を作動させるための電動機とを内蔵し、かつ電動機の周部に冷媒ガスの導入路を備える密閉型圧縮機において、
上記圧縮機部と電動機との間に放熱部を設けたことを特徴とする密閉型圧縮機。
In a hermetic case, a compressor part for compressing the refrigerant gas and a motor for operating the compressor part are built in, and a hermetic compressor having a refrigerant gas introduction path around the motor. ,
A hermetic compressor, wherein a heat radiator is provided between the compressor section and the electric motor.
密閉ケース内に、冷媒ガスを圧縮するための圧縮機部と、この圧縮機部を作動させるための電動機とを内蔵し、かつ電動機の周部に冷媒ガスの導入路を備える密閉型圧縮機において、
上記導入路に、その上流側では冷媒ガスを速く通過させる一方、下流側では冷媒ガスを遅く通過させるためのガス流速変更部を設けたことを特徴とする密閉型圧縮機。
In a hermetic case, a compressor part for compressing the refrigerant gas and a motor for operating the compressor part are built in, and a hermetic compressor having a refrigerant gas introduction path around the motor. ,
A hermetic compressor characterized in that a gas flow rate changing section is provided in the introduction path for allowing the refrigerant gas to pass quickly on the upstream side and for allowing the refrigerant gas to pass slowly on the downstream side.
密閉ケース内に、冷媒ガスを圧縮するための圧縮機部と、この圧縮機部を作動させるための電動機とを内蔵し、かつ電動機の動力を圧縮機部側に伝達するための駆動シャフト内に冷媒ガスの導入路を形成した密閉型圧縮機において、
上記導入路に、その上流側では冷媒ガスを速く通過させる一方、下流側では冷媒ガスを遅く通過させるためのガス流速変更部を設けたことを特徴とする密閉型圧縮機。
In a closed case, a compressor part for compressing the refrigerant gas and a motor for operating the compressor part are built in, and a drive shaft for transmitting the power of the motor to the compressor part side is provided. In a hermetic compressor that has formed a refrigerant gas introduction path,
A hermetic compressor characterized in that a gas flow rate changing section is provided in the introduction path for allowing the refrigerant gas to pass quickly on the upstream side and for allowing the refrigerant gas to pass slowly on the downstream side.
ガス流速変更部として導入路の内側にテーパー部を設けたことを特徴とする請求項5または請求項6記載の密閉型圧縮機。7. The hermetic compressor according to claim 5, wherein a tapered portion is provided inside the introduction path as the gas flow rate changing portion. ガス流速変更部として導入路の内側に段部を設けたことを特徴とする請求項5ないし請求項7のいずれかに記載の密閉型圧縮機。The hermetic compressor according to any one of claims 5 to 7, wherein a step portion is provided inside the introduction path as the gas flow rate changing portion.
JP17418894A 1994-07-26 1994-07-26 Hermetic compressor Expired - Lifetime JP3598132B2 (en)

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JP3598132B2 true JP3598132B2 (en) 2004-12-08

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CN106640662B (en) * 2017-01-24 2019-09-13 广东美芝制冷设备有限公司 Compressor
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