JP3872191B2 - Rotary compressor and refrigeration cycle - Google Patents

Rotary compressor and refrigeration cycle Download PDF

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Publication number
JP3872191B2
JP3872191B2 JP32413197A JP32413197A JP3872191B2 JP 3872191 B2 JP3872191 B2 JP 3872191B2 JP 32413197 A JP32413197 A JP 32413197A JP 32413197 A JP32413197 A JP 32413197A JP 3872191 B2 JP3872191 B2 JP 3872191B2
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Japan
Prior art keywords
rotary compressor
lower shell
shell
curvature
cylinder
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JP32413197A
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JPH11159487A (en
Inventor
博光 岩田
悦郎 鈴木
俊造 渡壁
昌彦 尾坂
純 佐藤
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松下冷機株式会社
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Description

【０００１】
【発明の属する技術分野】
本発明は、冷蔵庫などに使用されるロータリー圧縮機およびこれを用いた冷凍サイクルに関するものである。
【０００２】
【従来の技術】
従来のロータリー圧縮機は、公開特許公報平８−２１９０５４に記載の図６に用いられているものが知られている。
【０００３】
以下、図面を参照しながら、従来のロータリー圧縮機について説明する。
図６において、符号１で示す下シェルは、ケースシェル２とのつなぎ部１ａの折り返し部１ｂを有すと共に、前記下シェル１の底部の曲面１ｃを有するシェルの有効径Ｌは大きく、またケースシェル２の中心軸Ｙ−Ｙより同曲率δで形成されている。
【０００４】
【発明が解決しようとする課題】
上述のような従来のロータリー圧縮機は、下シェル１の底部の曲面１ｃを有する下シェルの有効径Ｌは大きく、またケースシェル２の中心軸ＹーＹより同曲率で形成されているため、下シェル１の底部の曲率δが小さくなっている。また、ケースシェル２とのつなぎ部１ａの折り返し部１ｂの曲率も小さくなっている。
【０００５】
これら下シェル１の底部の曲率１ｃと、ケースシェル２とのつなぎ部１ａの折り返し部１ｂの曲率が小さいため、下シェル１の高さを押さえることはできるが、下シェルの剛性力は弱く、音を伝えやすいといった問題があった。
【０００６】
本発明は以上のような課題を解決するもので、下シェルの板厚ｔと高さｈを押さえつつ、下シェルの剛性力を強くし、低騒音のロータリー圧縮機を得ることを目的とする。
【０００７】
【課題を解決するための手段】
この課題を解決するために、本発明は、ケースシェルとのつなぎ部の折り返し部の内測半径を板厚と同等、又は、同等以下とすると共に、ケースシェルの中心軸上に中心を持ち、異なる曲率を有し曲面を形成することで、下シェルの板厚ｔと高さｈを押さえつつ、下シェルの剛性力を強くしたものである。
【０００８】
【発明の実施の形態】
請求項１記載の発明は、密閉シェル内の上部にローターとステーターとから成る電動要素を内装し、前記モーターの下部に上部軸受け、下部軸受け及びシリンダーをもち、前記シリンダーのシリンダーボア内に、シャフトの偏芯部と前記偏芯部に嵌合するローラーと、前記ローラーと当接する事により、前記シリンダー内を低圧室と高圧室に分割するベーンを内装した圧縮要素を設けたロータリー圧縮機において、前記密閉シェルの下シェルにケースシェルとのつなぎ部の折り返し部を有すと共に、ケースシェルの中心軸上に中心を持ち、異なる曲率を有した曲面を形成し、前記下シェルの前記ケースシェルとのつなぎ部の折り返し部の内側半径を板厚と同等、又は、同等以下にすることで、ケースシェルとのつなぎ部の折り返し部の形成が容易に出来ると共に、下シェルの板厚と高さを押さえつつ、下シェルの剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【０００９】
請求項２記載の発明は、請求項１記載のロータリー圧縮機において、下シェルの中心部の曲率を外側部の曲率より小さくすることで、下シェルの板厚と高さを押さえつつ、下シェルの剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００１０】
また、請求項３記載の発明は、請求項１記載の下シェルにおいて、外側部から中心部へ小さく、又は、中心部から外側部へ大きく、段階的に曲率を変化させることで、板厚と高さを押さえつつ、下シェルの剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００１１】
また、請求項４記載の発明は、請求項１，２，３いずれかに記載のロータリー圧縮機において、下シェルの中心部の曲率を０にして平面を設けることで、下シェルの板厚と高さを押さえつつ、下シェルの剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００１３】
また、請求項５記載の発明は、請求項１，２，３，４いずれかに記載のロータリー圧縮機を備え、凝縮器と、キャピラリーチューブと、蒸発器を有し、冷媒にＨＦＣ又はＨＣを用いた冷凍サイクルを有するものであり、低騒音の冷凍サイクルにすることが出来る。
【００１４】
【実施例】
以下、本発明によるロータリー圧縮機用の実施例について、図面を参照しながら説明する。なお、従来と同一構成については、同一符号を付して詳細な説明を省略する。
【００１５】
（実施例１）
図１は、本発明の一実施例を示すロータリー圧縮機の縦断面図である。また、図２は、本発明の一実施例を示すロータリー圧縮機の要部断面図である。
【００１６】
符号３で示す下シェルは、ケースシェル２とのつなぎ部３ａの折り返し部３ｂを有すと共に、下シェル３の底部の曲面３ｃを有す。前記底部の曲面３ｃは、Ｙ−Ｙ軸上に中心を持つ、異なる曲率δ１，δ２で形成されている。
【００１７】
下シェル３の剛性力を強くするためには、底部の曲面３ｃの曲率δ１を大きくすれば良い。しかし、前記曲面３ｃの曲率δ１を大きくしただけでは、下シェルの高さｈが高くなるため、前記底部の曲面３ｃは、ケースシェル２の中心軸Ｙ−Ｙに中心を持ち、中心部の曲率δ２を外側部の曲率δ１より小さくして形成させることで、下シェル３の板厚ｔと高さｈを押さえつつ、下シェル３の剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００１８】
（実施例２）
図３は、本発明の一実施例を示すロータリー圧縮機の縦断面図である。また、図４は、本発明の一実施例を示すロータリー圧縮機の要部断面図である。
【００１９】
符号４で示す下シェルは、ケースシェル２とのつなぎ部４ａの折り返し部４ｂを有すと共に、下シェル４の底部の曲面４ｃを有す。前記底部の曲面４ｃは、ケースシェル２の中心軸Ｙ−Ｙに中心を持つ、異なる曲率δ’で形成されている。
【００２０】
下シェル４の剛性力を強くするためには、前記底部の曲面４ｃの曲率δ’を大きくすれば良い。しかし、前記底部の曲面４ｃの曲率δ’を大きくしただけでは、高さｈが高くなるため、前記曲面４ｃは、ケースシェル２の中心軸Ｙ−Ｙに中心を持ち、外側部から中心部へ小さく、又は、中心部から外側部へ大きく、段階的に曲率δ’を変化させて形成させることで、下シェル４の板厚ｔと高さｈを押さえつつ、下シェル４の剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００２１】
（実施例３）
図３は、本発明の一実施例を示すロータリー圧縮機の縦断面図である。また、図４は、本発明の一実施例を示すロータリー圧縮機の要部断面図である。なお、実施例２と同一部分については、同一符号を付して詳細な説明を省略する。
【００２２】
本実施例は、実施例２に示したロータリー圧縮機において、下シェル４の中心部の曲率をδ’＝０にすることで平面を設けて形成させることで、下シェル４の板厚ｔと高さｈを押さえつつ、下シェル４の剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００２３】
（実施例４）
図３は、本発明の一実施例を示すロータリー圧縮機の縦断面図である。また、図４は、本発明の一実施例を示すロータリー圧縮機の要部断面図である。
【００２４】
なお、実施例２と同一部分については、同一符号を付して詳細な説明を省略する。
【００２５】
本実施例は、実施例１〜実施例３に示したロータリー圧縮機において、下シェル４のケースシェル２とのつなぎ部４ａの折り返し部４ｂの内側半径Ｒを板厚ｔと同等、又は、同等以下にして、前記折り返し部４ｂの形成が容易に出来ると共に、下シェルの板厚ｔと高さｈを押さえつつ、下シェル４の剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００２６】
（実施例５）
図５は、本発明のロータリー圧縮機を用いた冷凍装置の冷凍サイクル図を示す。図５において、０１は実施例１〜実施例４に示したロータリー圧縮機で、吐出管０５によって凝縮器０４と接続され、吸入管０６によって蒸発器０２と接続されている。０３はキャピラリーチューブで、図の如く順次、環状に接続されて周知の冷凍サイクルを構成している。
【００２７】
また、冷媒にＨＦＣ又はＨＣを用いた冷凍サイクルを構成している。
【００２８】
【発明の効果】
以上、説明したように、請求項１記載の発明は、密閉シェル内の上部にローターとステーターとから成る電動要素を内装し、前記モーターの下部に上部軸受け、下部軸受け及びシリンダーをもち、前記シリンダーのシリンダーボア内に、シャフトの偏芯部と前記偏芯部に嵌合するローラーと、前記ローラーと当接する事により、前記シリンダー内を低圧室と高圧室に分割するベーンを内装した圧縮要素を設けたロータリー圧縮機において、前記密閉シェルの下シェルにケースシェルとのつなぎ部の折り返し部を有すと共に、ケースシェルの中心軸上に中心を持ち、異なる曲率を有した曲面を形成し、下シェルのケースシェルとのつなぎ部の折り返し部の内側半径を板厚と同等、又は、同等以下にしたものである。
【００２９】
したがって、折り返し部の形成が容易に出来ると共に、下シェルの板厚と高さを押さえつつ、下シェルの剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００３０】
また、請求項２記載の発明は、下シェルの中心部の曲率を外側部の曲率より小さくした請求項１記載のロータリー圧縮機である。
【００３１】
したがって、下シェルの板厚と高さを押さえつつ、下シェルの剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００３２】
また、請求項３記載の発明は、下シェルの外側部から中心部へ小さく、又は、中心部から外側部へ大きく、段階的に曲率を変化させた請求項１記載のロータリー圧縮機である。
【００３３】
したがって、下シェルの板厚と高さを押さえつつ、下シェルの剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００３４】
また、請求項４記載の発明は、下シェルの中心部の曲率を０にすることで平面を設けた請求項１，２，３いずれかに記載のロータリー圧縮機である。
【００３５】
したがって、下シェルの板厚と高さを押さえつつ、下シェルの剛性力を強くし、低騒音のロータリー圧縮機を得ることが出来る。
【００３８】
また、請求項５記載の発明は、請求項１，２，３，４いずれかに記載のロータリー圧縮機を備え、凝縮器と、キャピラリーチューブと、蒸発器を有し、冷媒にＨＦＣ又はＨＣを用いた冷凍サイクルである。
【００３９】
したがって、冷媒にＨＦＣ又はＨＣを用いた冷凍サイクルにおいて、低騒音化を得ることができる。
【図面の簡単な説明】
【図１】 本発明の実施例１を示すロータリー圧縮機の縦断面図
【図２】 前記実施例１を示すロータリー圧縮機の要部断面図
【図３】 本発明の実施例２及び実施例３及び実施例４を示すロータリー圧縮機の断面図
【図４】 前記実施例２及び前記実施例３及び前記実施例４を示すロータリー圧縮機の要部断面図
【図５】 本発明のロータリー圧縮機を用いた冷凍装置の冷凍サイクル図
【図６】 従来のロータリー圧縮機の断面図
【符号の説明】
Ａ 圧縮要素
Ｂ 電動要素
１ 下シェル
２ ケースシェル
１ａ つなぎ部
１ｂ 折り返し部
１ｃ 底部の曲面
δ 同一曲率
ｒ 底部の曲面１ｃの半径
Ｙ−Ｙ ケースシェルの中心軸
Ｌ 底部の曲面１ｃを有するシェルの有効径
３ 下シェル
３ａ つなぎ部
３ｂ 折り返し部
３ｃ 底部の曲面
δ１ 外側部の曲率
δ２ 中心部の曲率
ｒ１ 外側部曲面の半径
ｒ２ 中心部曲面の半径
４ 下シェル
４ａ つなぎ
４ｂ 折り返し部
４ｃ 底部の曲面
δ’ 異なる曲率（変数）
ｒ’ 底部の曲面４ｃの半径（変数）
Ｒ 折り返し部４ｂの内側半径
ｈ 高さ
ｔ 板厚
０１ ロータリー圧縮機
０２ 蒸発器
０３ キャピラリーチューブ
０４ 凝縮器
０５ 吐出管
０６ 吸入管[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary compressor used in a refrigerator and the like and a refrigeration cycle using the same.
[0002]
[Prior art]
As a conventional rotary compressor, the one used in FIG. 6 described in Japanese Patent Application Laid-Open No. 8-219054 is known.
[0003]
Hereinafter, a conventional rotary compressor will be described with reference to the drawings.
In FIG. 6, the lower shell denoted by reference numeral 1 has a folded portion 1b of the connecting portion 1a with the case shell 2, and the effective diameter L of the shell having the curved surface 1c at the bottom of the lower shell 1 is large. The shell 2 is formed with the same curvature δ from the central axis YY of the shell 2.
[0004]
[Problems to be solved by the invention]
In the conventional rotary compressor as described above, the effective diameter L of the lower shell having the curved surface 1c at the bottom of the lower shell 1 is large, and is formed with the same curvature from the central axis YY of the case shell 2, The curvature δ at the bottom of the lower shell 1 is small. Further, the curvature of the folded portion 1b of the connecting portion 1a with the case shell 2 is also reduced.
[0005]
Since the curvature 1c of the bottom portion of the lower shell 1 and the curvature of the folded portion 1b of the connecting portion 1a with the case shell 2 are small, the height of the lower shell 1 can be suppressed, but the rigidity of the lower shell is weak, There was a problem that it was easy to convey sound.
[0006]
The present invention solves the above-described problems, and an object thereof is to obtain a low-noise rotary compressor by increasing the rigidity of the lower shell while suppressing the plate thickness t and height h of the lower shell. .
[0007]
[Means for Solving the Problems]
In order to solve this problem, the present invention has an internal measurement radius of the folded portion of the connection portion with the case shell equal to or less than or equal to the plate thickness, and has a center on the central axis of the case shell, By forming a curved surface having different curvatures, the rigidity of the lower shell is increased while suppressing the plate thickness t and height h of the lower shell.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, an electric element composed of a rotor and a stator is provided in an upper part of a sealed shell, and an upper bearing, a lower bearing and a cylinder are provided in a lower part of the motor, and a shaft is provided in a cylinder bore of the cylinder. In the rotary compressor provided with a compression element that includes a vane that divides the inside of the cylinder into a low pressure chamber and a high pressure chamber by contacting the roller with the eccentric portion of the roller and the roller that fits the eccentric portion, The lower shell of the hermetic shell has a folded portion of a connection portion with the case shell, has a center on the central axis of the case shell, forms a curved surface having a different curvature, and the case shell of the lower shell equivalent to the inner radius thickness of the folded portion of the connecting portion of, or, by the same or less, the formation of the folded portion of the connecting portion between the casing shell Together can the easy, while suppressing the thickness and height of the lower shell, and strong rigidity of the lower shell, it is possible to obtain a rotary compressor of low noise.
[0009]
According to a second aspect of the present invention, in the rotary compressor according to the first aspect, the curvature of the central portion of the lower shell is made smaller than the curvature of the outer portion, thereby suppressing the thickness and height of the lower shell The low-noise rotary compressor can be obtained.
[0010]
Further, in the lower shell according to the first aspect, the thickness of the lower shell can be reduced by gradually changing the curvature from the outer portion to the central portion, or from the central portion to the outer portion. While suppressing the height, the lower shell rotary compressor can be obtained by increasing the rigidity of the lower shell.
[0011]
According to a fourth aspect of the present invention, in the rotary compressor according to any one of the first, second, and third aspects, by providing a flat surface with the curvature of the central portion of the lower shell being zero, While suppressing the height, the lower shell rotary compressor can be obtained by increasing the rigidity of the lower shell.
[0013]
The invention according to claim 5 includes the rotary compressor according to any one of claims 1, 2, 3 and 4 , and includes a condenser, a capillary tube, and an evaporator, and HFC or HC is used as a refrigerant. It has the used refrigeration cycle and can be a low noise refrigeration cycle.
[0014]
【Example】
Embodiments for a rotary compressor according to the present invention will be described below with reference to the drawings. In addition, about the same structure as the past, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0015]
Example 1
FIG. 1 is a longitudinal sectional view of a rotary compressor showing an embodiment of the present invention. FIG. 2 is a sectional view of an essential part of the rotary compressor showing an embodiment of the present invention.
[0016]
The lower shell denoted by reference numeral 3 has a folded portion 3 b of the connecting portion 3 a with the case shell 2 and has a curved surface 3 c at the bottom of the lower shell 3. The curved surface 3c at the bottom is formed with different curvatures δ1 and δ2 having a center on the Y-Y axis.
[0017]
In order to increase the rigidity of the lower shell 3, the curvature δ1 of the curved surface 3c at the bottom may be increased. However, since the height h of the lower shell is increased only by increasing the curvature δ1 of the curved surface 3c, the curved surface 3c of the bottom portion is centered on the central axis YY of the case shell 2, and the curvature of the central portion is increased. By forming δ2 smaller than the curvature δ1 of the outer portion, the rigidity of the lower shell 3 is increased while the plate thickness t and height h of the lower shell 3 are suppressed, and a low noise rotary compressor is obtained. I can do it.
[0018]
(Example 2)
FIG. 3 is a longitudinal sectional view of a rotary compressor showing an embodiment of the present invention. FIG. 4 is a cross-sectional view of an essential part of a rotary compressor showing an embodiment of the present invention.
[0019]
The lower shell indicated by reference numeral 4 has a folded portion 4 b of the connecting portion 4 a with the case shell 2 and has a curved surface 4 c at the bottom of the lower shell 4. The bottom curved surface 4c is formed with a different curvature δ ′ centered on the central axis YY of the case shell 2.
[0020]
In order to increase the rigidity of the lower shell 4, the curvature δ ′ of the curved surface 4c at the bottom may be increased. However, since the height h increases only by increasing the curvature δ ′ of the curved surface 4c at the bottom, the curved surface 4c is centered on the central axis YY of the case shell 2 and extends from the outer portion to the central portion. The rigidity of the lower shell 4 is increased while suppressing the plate thickness t and height h of the lower shell 4 by forming it with a smaller or larger curvature δ ′ stepwise from the center part to the outer part. In addition, a low noise rotary compressor can be obtained.
[0021]
(Example 3)
FIG. 3 is a longitudinal sectional view of a rotary compressor showing an embodiment of the present invention. FIG. 4 is a cross-sectional view of an essential part of a rotary compressor showing an embodiment of the present invention. In addition, about the same part as Example 2, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0022]
In this embodiment , in the rotary compressor shown in the second embodiment, a flat surface is formed by setting the curvature of the central portion of the lower shell 4 to δ ′ = 0, so that the plate thickness t of the lower shell 4 and While suppressing the height h, the rigidity of the lower shell 4 is increased and a low noise rotary compressor can be obtained.
[0023]
Example 4
FIG. 3 is a longitudinal sectional view of a rotary compressor showing an embodiment of the present invention. FIG. 4 is a cross-sectional view of an essential part of a rotary compressor showing an embodiment of the present invention.
[0024]
In addition, about the same part as Example 2, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0025]
In this embodiment , in the rotary compressor shown in Examples 1 to 3 , the inner radius R of the folded portion 4b of the connecting portion 4a of the lower shell 4 and the case shell 2 is equal to or equal to the plate thickness t. In the following, it is possible to easily form the folded portion 4b and to increase the rigidity of the lower shell 4 while suppressing the plate thickness t and height h of the lower shell, thereby obtaining a low noise rotary compressor. I can do it.
[0026]
(Example 5)
FIG. 5 shows a refrigeration cycle diagram of a refrigeration apparatus using the rotary compressor of the present invention. In FIG. 5, 01 is the rotary compressor shown in the first to fourth embodiments, which is connected to the condenser 04 by the discharge pipe 05 and connected to the evaporator 02 by the suction pipe 06. Reference numeral 03 denotes a capillary tube, which is sequentially connected in an annular shape as shown in the figure to constitute a known refrigeration cycle.
[0027]
In addition, a refrigeration cycle using HFC or HC as a refrigerant is configured.
[0028]
【The invention's effect】
As described above, according to the first aspect of the present invention, an electric element comprising a rotor and a stator is provided in the upper part of the hermetic shell, and an upper bearing, a lower bearing and a cylinder are provided at the lower part of the motor. In the cylinder bore, a compression element including a shaft eccentric part, a roller fitted to the eccentric part, and a vane that divides the inside of the cylinder into a low pressure chamber and a high pressure chamber by contacting the roller. In the provided rotary compressor, the lower shell of the hermetic shell has a folded portion of a connecting portion with the case shell, has a center on the central axis of the case shell, forms a curved surface having a different curvature , The inner radius of the folded portion of the joint portion between the shell and the case shell is equal to or less than the plate thickness .
[0029]
Therefore, the folded portion can be easily formed, and the rigidity and strength of the lower shell can be increased while suppressing the plate thickness and height of the lower shell, and a low-noise rotary compressor can be obtained.
[0030]
Moreover, invention of Claim 2 is the rotary compressor of Claim 1 which made the curvature of the center part of the lower shell smaller than the curvature of an outer side part.
[0031]
Accordingly, it is possible to increase the rigidity of the lower shell while suppressing the thickness and height of the lower shell, and to obtain a low noise rotary compressor.
[0032]
The invention according to claim 3 is the rotary compressor according to claim 1, wherein the curvature is changed stepwise from the outer portion of the lower shell to the center portion or from the center portion to the outer portion.
[0033]
Accordingly, it is possible to increase the rigidity of the lower shell while suppressing the thickness and height of the lower shell, and to obtain a low noise rotary compressor.
[0034]
The invention according to claim 4 is the rotary compressor according to any one of claims 1, 2 and 3, wherein a flat surface is provided by setting the curvature of the central portion of the lower shell to zero.
[0035]
Accordingly, it is possible to increase the rigidity of the lower shell while suppressing the thickness and height of the lower shell, and to obtain a low noise rotary compressor.
[0038]
The invention according to claim 5 includes the rotary compressor according to any one of claims 1, 2, 3 and 4 , and includes a condenser, a capillary tube, and an evaporator, and HFC or HC is used as a refrigerant. The refrigeration cycle used.
[0039]
Therefore, low noise can be obtained in a refrigeration cycle using HFC or HC as a refrigerant.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a rotary compressor showing Embodiment 1 of the present invention. FIG. 2 is a sectional view of essential parts of the rotary compressor showing Embodiment 1. FIG. 3 is an embodiment of the present invention. sectional view of a rotary compressor showing a 3 and example 4 [4] rotary compression of the embodiment fragmentary cross-sectional view of a rotary compressor shown 2 and example 3 and example 4 [5] the present invention Refrigeration cycle diagram of a refrigeration system using a compressor [Fig. 6] Cross-sectional view of a conventional rotary compressor
A Compression element B Electric element 1 Lower shell 2 Case shell 1a Joint part 1b Folding part 1c Curved surface of bottom part δ Same curvature r Radius of curved surface 1c of bottom part YY Center axis of case shell L Effective shell having curved surface 1c of bottom part Diameter 3 Lower shell 3a Joint part 3b Folded part 3c Curved surface of bottom part δ1 Curvature of outer part δ2 Curvature of central part r1 Radius of curved part of outer part r2 Radius of curved surface of central part 4 Lower shell 4a Joint 4b Folded part 4c Curved surface of bottom part δ ' Different curvature (variable)
r 'Radius of bottom curved surface 4c (variable)
R Inside radius of folded portion 4b h Height t Thickness 01 Rotary compressor 02 Evaporator 03 Capillary tube 04 Condenser 05 Discharge pipe 06 Suction pipe

Claims (5)

密閉シェル内の上部にローターとステーターとから成る電動要素を内装し、前記モーターの下部に上部軸受け、下部軸受け及びシリンダーをもち、前記シリンダーのシリンダーボア内に、シャフトの偏芯部と前記偏芯部に嵌合するローラーと、前記ローラーと当接する事により、前記シリンダー内を低圧室と高圧室に分割するベーンを内装した圧縮要素を設けたロータリー圧縮機において、前記密閉シェルの下シェルにケースシェルとのつなぎ部の折り返し部を有すと共に、ケースシェルの中心軸上に中心を持ち、異なる曲率を有した曲面を形成し、前記下シェルの前記ケースシェルとのつなぎ部の折り返し部の内側半径を板厚と同等、又は、同等以下にしたロータリー圧縮機。An electric element consisting of a rotor and a stator is installed in the upper part of the hermetic shell, and an upper bearing, a lower bearing and a cylinder are provided in the lower part of the motor. The eccentric part of the shaft and the eccentric part are provided in the cylinder bore of the cylinder. A rotary compressor provided with a compression element having a vane that divides the inside of the cylinder into a low-pressure chamber and a high-pressure chamber by contacting the roller with a roller that fits in a portion, and a case in a lower shell of the hermetic shell A curved portion having a center portion on the central axis of the case shell and having a different curvature is formed and has an inner portion of the folded portion of the lower shell connecting portion with the case shell. A rotary compressor whose radius is equal to or less than the plate thickness . 下シェルの中心部の曲率を外側部の曲率より小さくした請求項１記載のロータリー圧縮機。  The rotary compressor according to claim 1, wherein the curvature of the center portion of the lower shell is smaller than the curvature of the outer portion. 下シェルの外側部から中心部へ小さく、又は、中心部から外側部へ大きく、段階的に曲率を変化させた請求項１記載のロータリー圧縮機。  The rotary compressor according to claim 1, wherein the curvature is changed stepwise from the outer portion of the lower shell to the center portion or from the center portion to the outer portion. 下シェルの中心部の曲率を０にすることで平面を設けた請求項１，２，３いずれかに記載のロータリー圧縮機。  The rotary compressor according to any one of claims 1, 2, and 3, wherein a flat surface is provided by setting the curvature of the center portion of the lower shell to zero. 請求項１，２，３，４いずれかに記載のロータリー圧縮機を備え、凝縮器と、キャピラリーチューブと、蒸発器を有し、冷媒にＨＦＣ又はＨＣを用いた冷凍サイクル。A refrigeration cycle comprising the rotary compressor according to any one of claims 1, 2, 3 and 4 , comprising a condenser, a capillary tube, and an evaporator, and using HFC or HC as a refrigerant.
JP32413197A 1997-11-26 1997-11-26 Rotary compressor and refrigeration cycle Expired - Fee Related JP3872191B2 (en)

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JPS53134213A (en) * 1977-04-27 1978-11-22 Hitachi Ltd Seal vessel for totally-enclosed type motor compressor
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JPS58150092A (en) * 1982-03-02 1983-09-06 Sanyo Electric Co Ltd Enclosed type rotary compressor
JPS6480779A (en) * 1987-09-21 1989-03-27 Matsushita Refrigeration Enclosed type motor-driven compressor
JP2980259B2 (en) * 1991-07-03 1999-11-22 松下冷機株式会社 Hermetic electric compressor
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