JP4395013B2 - Hermetic compressor - Google Patents

Hermetic compressor Download PDF

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JP4395013B2
JP4395013B2 JP2004176887A JP2004176887A JP4395013B2 JP 4395013 B2 JP4395013 B2 JP 4395013B2 JP 2004176887 A JP2004176887 A JP 2004176887A JP 2004176887 A JP2004176887 A JP 2004176887A JP 4395013 B2 JP4395013 B2 JP 4395013B2
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opening
cup
sealed container
separate member
hermetic
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JP2006002586A5 (en
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英司 坂本
英明 前山
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Mitsubishi Electric Corp
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Description

本発明は、密閉型圧縮機に関し、特に、気密端子の密閉容器への取付け改善による密閉容器の耐圧強度の向上に関するものである。   The present invention relates to a hermetic compressor, and more particularly to an improvement in the pressure resistance of a hermetic container by improving the attachment of an airtight terminal to the hermetic container.

圧力の高い冷媒が使用できる耐圧強度を持った密閉容器を提供するため、密閉容器に取付ける気密端子の破損を防止する従来技術には、冷媒としてＲ４１０Ａ使用の高圧型の密閉型圧縮機において、気密端子をドーナツ状の鋼製の平板に気密溶接し、この平板を密閉容器の上鏡板部に重なり部を持って気密溶接したものがある。ここで、平板の板厚は密閉容器の上鏡板部の板厚より厚く設定され、また、重なり部の長さは上鏡板部の板厚より長い重なり代とする（例えば、特許文献１参照）。
特開平１１−６４７９号公報（第５頁、第６頁、図１１） In order to provide a hermetic container having a pressure-resistant strength that can use a high-pressure refrigerant, the conventional technique for preventing damage to the hermetic terminal attached to the hermetic container includes a high-pressure hermetic compressor using R410A as the refrigerant, Some terminals are hermetically welded to a donut-shaped steel flat plate, and this flat plate is hermetically welded with an overlapping portion on the upper end plate portion of the sealed container. Here, the plate thickness of the flat plate is set to be thicker than the plate thickness of the upper end plate portion of the sealed container, and the length of the overlap portion is longer than the plate thickness of the upper end plate portion (see, for example, Patent Document 1). .
Japanese Patent Laid-Open No. 11-6479 (5th page, 6th page, FIG. 11)

しかしながら、上記従来の構成の密閉型圧縮機では、二酸化炭素のようなＲ４１０Ａより圧力が高い冷媒を使用する場合、変形に対する剛性が充分でない。そこで、剛性を向上するために、例えば、上鏡板部と気密端子のカップ形金属体の板厚を共に厚くしなければならない。ところで、厚さを厚くすると、気密端子を抵抗溶接により上鏡板部に取付ける際に、従来よりも大きな電流が必要となる。大電流で溶接すると、この大電流の影響で気密端子のガラス部に割れが生じたり、また、溶接強度のばらつきも大きくなり、密閉容器内の圧力が上昇した場合に、気密端子のガラス部に割れが生じたり、気密端子の溶接部が破壊する等の問題点があった。   However, in the above-described hermetic type compressor, when a refrigerant having a pressure higher than R410A such as carbon dioxide is used, rigidity against deformation is not sufficient. Therefore, in order to improve rigidity, for example, the plate thickness of the cup-shaped metal body of the upper end plate portion and the airtight terminal must be increased. By the way, when the thickness is increased, a larger current than that in the past is required when the hermetic terminal is attached to the upper end plate portion by resistance welding. When welding with a large current, the glass portion of the hermetic terminal is cracked due to the influence of this large current, and when the pressure in the sealed container rises due to large variations in welding strength, There have been problems such as cracking and destruction of the welded portion of the hermetic terminal.

本発明は、上記のような課題を解決するためになされたもので、気密端子の溶接時に気密端子のガラス部の割れが生じることがなく、また、密閉容器内の圧力が上昇した場合に、気密端子のガラス部の割れを防ぎ、気密端子の溶接部の破壊のない耐圧強度の向上した密閉容器を有する密閉型圧縮機を得ることを目的とする。   The present invention was made in order to solve the above-mentioned problems, the glass part of the hermetic terminal is not cracked during welding of the hermetic terminal, and when the pressure in the sealed container is increased, It is an object of the present invention to provide a hermetic compressor having a hermetic container having an improved pressure-resistant strength that prevents the glass part of the hermetic terminal from being broken and does not break the welded part of the hermetic terminal.

本発明に係る密閉型圧縮機は、密閉容器内に、圧縮機構及びその圧縮機構を駆動する電動機を収容し、また、別部材に開口部を形成し、該開口部に、電動機に電力を供給する気密端子を開口部を貫通するように取付け、さらに、別部材を密閉容器に形成した開口部に取付けることにより、気密端子を別部材を介して、密閉容器を貫通して密閉容器に取付けた密閉型圧縮機であって、
別部材は、鋼材からなり、底面部と側面部を有するカップ状体であり、その鋼材の降伏点応力を密閉容器の鋼材の降伏点応力より大きくし、また、その板厚を密閉容器の板厚より小さくするとともに、
カップ状体の底面部に別部材の開口部を形成し、
気密端子の別部材への取付けは、気密端子を開口部を貫通させ、気密端子と前記開口形成部との溶接で行い、
カップ状体は側面部で密閉容器に溶接固定されたものである。 A hermetic compressor according to the present invention houses a compression mechanism and an electric motor that drives the compression mechanism in a hermetic container, and forms an opening in a separate member, and supplies electric power to the motor through the opening. The airtight terminal is attached so as to pass through the opening, and further, another member is attached to the opening formed in the sealed container, so that the airtight terminal is attached to the sealed container through the separate member through the sealed container. A hermetic compressor,
Another member is a cup-shaped body made of steel and having a bottom surface portion and a side surface portion. The yield point stress of the steel material is made larger than the yield point stress of the steel material of the sealed container, and the plate thickness of the sealed container is increased. While making it smaller than the thickness,
Form an opening of another member on the bottom of the cup-shaped body,
The mounting of the airtight terminal to another member is performed by welding the airtight terminal and the opening forming portion through the opening of the airtight terminal,
The cup-shaped body is welded and fixed to the closed container at the side surface.

本発明の密閉型圧縮機においては、別部材は、鋼材からなり、底面部と側面部を有するカップ状体であり、その板厚を密閉容器の板厚より小さくするとともに、カップ状体の底面部に別部材の開口部を形成した。そして、気密端子の別部材への取付けは、気密端子を開口部を貫通させ、気密端子と開口形成部との溶接で行うので、溶接の際、小電流で行うことができ、溶接による気密端子のガラス部の割れを防止でき、溶接部の溶接強度のばらつきがなく、溶接強度を安定して確保することができる。また、別部材は、その鋼材の降伏点応力を密閉容器の鋼材の降伏点応力より大きくしたので、別部材を介してガラス端子を取付けた密閉容器内の圧力が上昇した時にも、別部材の開口形成部等の溶接部周辺の変形を抑えて気密端子のガラス部及び溶接部の破壊を防ぎ、密閉容器の耐圧強度を向上させることができるという効果を有する。   In the hermetic compressor of the present invention, the separate member is a cup-shaped body made of steel and having a bottom surface portion and a side surface portion. The plate thickness is made smaller than the plate thickness of the sealed container, and the bottom surface of the cup-shaped body. The opening part of another member was formed in the part. And, since the hermetic terminal is attached to another member by passing the hermetic terminal through the opening and welding the hermetic terminal and the opening forming part, the welding can be performed with a small current. The glass part can be prevented from cracking, there is no variation in the welding strength of the welded part, and the welding strength can be secured stably. Moreover, since the yield point stress of the steel member is larger than the yield point stress of the steel material of the sealed container, the separate member has a different member This has the effect that the deformation around the welded portion such as the opening forming portion can be suppressed to prevent the glass portion of the airtight terminal and the welded portion from being broken, and the pressure resistance strength of the sealed container can be improved.

参考例１．
図１は、本発明の参考例１における密閉型圧縮機を示す縦断面図であり、図２は、図１の気密端子取付け部周辺を示す要部断面図である。
これらの図において、密閉型圧縮機の密閉容器４内には、下部の圧縮機構１０と、圧縮機構１０の上方の電動機１３と、電動機１３の回転力により圧縮機構１０を駆動する駆動軸８等が収容される。
密閉容器４は、円筒形の胴部１と、その両端（図１では上下）の皿形の上鏡板部２及び皿形の下鏡板部３とが気密状に溶接固定される。
圧縮機構１０は、密閉容器４の胴部１の下部に溶接固定された円筒状のシリンダ５と、その上下を挟持する上軸受け６及び下軸受け７と、シリンダ５内で駆動軸８の偏心部に嵌合され、シリンダ５の内面とで圧縮を行うローラ９とで構成される。
電動機１３は、胴部１の上部に焼き嵌め固定されたステータ１１と、圧縮機構１０を駆動する駆動軸８に焼き嵌め固定されたロータ１２とで構成される。 Reference Example 1
FIG. 1 is a longitudinal sectional view showing a hermetic compressor in Reference Example 1 of the present invention, and FIG. 2 is a principal sectional view showing the periphery of an airtight terminal mounting portion in FIG.
In these drawings, in the hermetic container 4 of the hermetic compressor, a lower compression mechanism 10, an electric motor 13 above the compression mechanism 10, a drive shaft 8 that drives the compression mechanism 10 by the rotational force of the electric motor 13, and the like. Is housed.
In the sealed container 4, the cylindrical body 1 and the dish-shaped upper end plate part 2 and the dish-shaped lower end plate part 3 at both ends (upper and lower in FIG. 1) are welded and fixed in an airtight manner.
The compression mechanism 10 includes a cylindrical cylinder 5 welded and fixed to a lower portion of the body 1 of the sealed container 4, an upper bearing 6 and a lower bearing 7 that sandwich the upper and lower sides thereof, and an eccentric portion of the drive shaft 8 within the cylinder 5. And a roller 9 that compresses with the inner surface of the cylinder 5.
The electric motor 13 includes a stator 11 that is shrink-fitted and fixed to the upper portion of the body 1, and a rotor 12 that is shrink-fitted and fixed to the drive shaft 8 that drives the compression mechanism 10.

また、密閉型圧縮機の密閉容器４の胴部１の下部に、冷媒回路から圧縮機構１０に冷媒を吸入する吸入管１４が気密状に貫通して溶接固定されており、その内端部はシリンダ５に挿入されている。
また、上鏡板部２に、冷媒回路に冷媒を吐出する吐出管１５と電動機１３に電力を供給するために結線される気密端子１６が気密状に貫通して溶接固定されている。 A suction pipe 14 for sucking refrigerant from the refrigerant circuit to the compression mechanism 10 is hermetically sealed and fixed to the lower part of the body 1 of the hermetic container 4 of the hermetic compressor. It is inserted into the cylinder 5.
Further, a discharge pipe 15 that discharges the refrigerant to the refrigerant circuit and an airtight terminal 16 that is connected to supply electric power to the electric motor 13 penetrate the upper end plate portion 2 in an airtight manner and are fixed by welding.

次に、気密端子１６の取付け周辺部について詳しく説明する。
気密端子１６は、上部の平坦部と下方にスカート状に広がった下部のスカート部２１とを有するカップ形金属体１７と、その平坦部に有する孔に挿通された鋼製ピン１８と、カップ形金属体１７と鋼製ピン１８を絶縁するガラス部１９とで構成される。
そして、この気密端子１６は、平板２０の中央部に設けられた開口に嵌め込まれ、カップ形金属体１７のスカート部２１で抵抗溶接により開口を形成する開口形成部に気密状に取付けられる。このように、気密端子１６は、平板２０の開口部に溶接により気密状に取付けられる。この平板２０は、気密端子１６を密閉容器４の上鏡板部２に取付けるために使用する別部材であり、上鏡板部２の鋼材より降伏点応力が大きい鋼材が使用されており、その板厚は上鏡板部２の板厚より薄くなっている。例えば、上鏡板部２には板厚８ｍｍ、自動車構造用熱間圧延鋼板で、降伏点応力が１７５Ｎ／ｍｍ2 であるものを使用するのに対して、平板２０には、板厚６ｍｍ、自動車用加工性熱間圧延高張力鋼板で、降伏点応力が３２５Ｎ／ｍｍ2 のものを使用する。
気密端子１６が溶接された平板２０は、皿形の上鏡板部２の平坦部に形成した開口を気密端子１６が貫通するように、また、平板２０の周辺部が平坦部に重なり部を持って載置され、重なり部の先端部で気密状に上鏡板部２に溶接固定される。このように、気密端子１６を取付けた平板２０は、上鏡板部２の開口部に取付けられる。図２には、上鏡板部２の外側に取付けた例を示すが、内側に取付けてもよい。 Next, the mounting periphery of the airtight terminal 16 will be described in detail.
The airtight terminal 16 includes a cup-shaped metal body 17 having an upper flat portion and a lower skirt portion 21 spreading downward in a skirt shape, a steel pin 18 inserted through a hole in the flat portion, and a cup-shaped member. It is comprised by the glass part 19 which insulates the metal body 17 and the steel pins 18. FIG.
The hermetic terminal 16 is fitted into an opening provided in the central portion of the flat plate 20 and attached to an opening forming portion that forms an opening by resistance welding at the skirt portion 21 of the cup-shaped metal body 17. Thus, the airtight terminal 16 is attached to the opening of the flat plate 20 in an airtight manner by welding. The flat plate 20 is a separate member used for attaching the airtight terminal 16 to the upper end plate part 2 of the sealed container 4, and a steel material having a yield point stress larger than that of the upper end plate part 2 is used. Is thinner than the thickness of the upper end plate 2. For example, the upper end plate portion 2 is a hot rolled steel plate having a thickness of 8 mm and having a yield point stress of 175 N / mm 2 , whereas the flat plate 20 has a thickness of 6 mm and a vehicle. Workable hot-rolled high-tensile steel plate with a yield point stress of 325 N / mm 2 is used.
The flat plate 20 to which the hermetic terminal 16 is welded has an opening formed in the flat portion of the dish-shaped upper end plate portion 2 so that the hermetic terminal 16 penetrates, and the peripheral portion of the flat plate 20 has an overlap portion on the flat portion. And is welded and fixed to the upper end plate portion 2 in an airtight manner at the tip of the overlapping portion. Thus, the flat plate 20 to which the airtight terminal 16 is attached is attached to the opening of the upper end plate portion 2. FIG. 2 shows an example in which the upper end plate portion 2 is attached to the outside, but it may be attached to the inside.

次にこのように構成した密閉型圧縮機の動作について説明する。
冷媒は、冷凍回路から吸入管１４を通り圧縮機構１０に吸入され、圧縮機構１０で圧縮され、高圧となり密閉容器４内に吐出される。この冷媒は、吐出管１５より冷凍回路へ吐出される。したがって、通常の運転時は、密閉容器４内は高圧の冷媒で満たされる。密閉容器４内の圧力が上昇すると、密閉容器４は次第に膨らむ方向の力を受け、上鏡板部２は球形状に膨らむ力を受ける。 Next, the operation of the hermetic compressor configured as described above will be described.
The refrigerant passes through the suction pipe 14 from the refrigeration circuit, is sucked into the compression mechanism 10, is compressed by the compression mechanism 10, becomes high pressure, and is discharged into the sealed container 4. This refrigerant is discharged from the discharge pipe 15 to the refrigeration circuit. Therefore, during normal operation, the sealed container 4 is filled with a high-pressure refrigerant. When the pressure in the sealed container 4 rises, the sealed container 4 receives a force in a gradually expanding direction, and the upper end plate part 2 receives a force that expands into a spherical shape.

しかしながら、本密閉型圧縮機においては、気密端子１６を密閉容器４の上鏡板部２に上記のように取付けているので、密閉容器の耐圧強度が向上し、冷媒として二酸化炭素のような圧力の高い冷媒の使用も可能となる。
即ち、気密端子１６を取付けた別部材である鋼材からなる平板２０の板厚を薄くしている（上鏡板部２の板厚より薄くしている）ので、気密端子１６を平板２０の開口部に抵抗溶接で取付ける際に、小さな電流で溶接することができ、ガラス部１９に割れを生じることが無く、また、スカート部２１と平板２０の開口を形成する開口形成部との溶接部の溶接強度を安定して確保できる。
さらに、この平板２０は上鏡板部２より降伏点応力の大きい鋼材を使用し（材質的に剛性を大きくする効果）、かつ、気密端子１６が溶接固定された平板２０は、上鏡板部２に重なり部を持って溶接固定される（構造的に剛性を大きくする効果）ので、剛性が大きくなり、そこで、密閉容器４内の圧力が上昇した場合に、平板２０の変形（特に、開口形成部の変形）が抑えられ、気密端子１６に生じる応力を小さくすることができ、変形応力による気密端子１６のガラス部１９または溶接部が破壊するのを防止できる。
なお、気密端子１６の取り付け場所は、上鏡板部２に限らず、密閉容器４の胴部１でもよく、胴部１の場合も、部分的に平坦部を形成し、上記の上鏡板部２の場合と同様に取付ける。
また、気密端子１６の溶接は、熱影響によるガラス部１９の破損を防止する必要上、局所的に熱を加えて溶接するため抵抗溶接が実用的であり、別部材である平板２０と密閉容器４の溶接は、溶接金属が母材より高強度な材料を用いたアーク溶接又はロー付け等が剛性を向上させるために実用的である。 However, in the hermetic compressor, since the hermetic terminal 16 is attached to the upper end plate 2 of the hermetic container 4 as described above, the pressure resistance of the hermetic container is improved, and the pressure of carbon dioxide as a refrigerant is increased. The use of a high refrigerant is also possible.
That is, the plate thickness of the flat plate 20 made of steel, which is another member to which the hermetic terminal 16 is attached, is made thinner (thinner than the plate thickness of the upper end plate portion 2). Can be welded with a small current, and the glass part 19 is not cracked, and the welded part is welded between the skirt part 21 and the opening forming part that forms the opening of the flat plate 20. The strength can be secured stably.
Further, the flat plate 20 uses a steel material having a higher yield point stress than the upper end plate part 2 (effect of increasing the rigidity of the material), and the flat plate 20 to which the airtight terminal 16 is fixed by welding is attached to the upper end plate part 2. Since it is fixed by welding with an overlapping portion (an effect of structurally increasing rigidity), the rigidity is increased. Therefore, when the pressure in the sealed container 4 rises, the deformation of the flat plate 20 (particularly, the opening forming portion). Deformation of the airtight terminal 16 can be suppressed, and the glass portion 19 or the welded portion of the airtight terminal 16 due to the deformation stress can be prevented from being broken.
The mounting location of the airtight terminal 16 is not limited to the upper end plate portion 2 but may be the body portion 1 of the sealed container 4. In the case of the body portion 1, a flat portion is partially formed, and the upper end plate portion 2 described above. Install in the same way as above.
Further, the welding of the airtight terminal 16 is necessary to prevent the glass part 19 from being damaged due to the heat effect, so that resistance welding is practical because it is locally heated and welded. The welding of No. 4 is practical because arc welding or brazing using a material in which the weld metal is stronger than the base metal improves rigidity.

以上のように、別部材である、鋼材からなる平板２０の降伏点応力を密閉容器４の鋼材の降伏点応力より大きくし、また、その板厚を密閉容器４の板厚より小さくし、この平板２０に開口部を形成し、該開口部に気密端子１６を貫通するように溶接し、また、この平板２０は密閉容器４の開口部の開口形成部に重なり部を形成し、密閉容器４に溶接したので、溶接により気密端子１６を取付ける際のガラス部１９の破壊を防ぎ、且つ、密閉容器４内の圧力が上昇した場合に、気密端子１６を溶接した平板２０の変形を抑えて、ガラス部１９及び溶接部の破壊を防ぐことができる。
そこで、密閉容器４の耐圧強度を向上させることができる。
なお、上記において、平板２０及び密閉容器４（上鏡板部２）の開口、開口形成部及び開口部とは、平板２０又は密閉容器４（上鏡板部２）の開口を形成する開口周辺部が開口形成部であり、また、開口及び開口形成部を合せて開口部とする。実施の形態１以降におけるカップ状体であるカップ形金属体２２、２３においても同様である。 As described above, the yield point stress of the flat plate 20 made of steel, which is a separate member, is made larger than the yield point stress of the steel material of the sealed container 4, and the plate thickness is made smaller than the plate thickness of the sealed container 4, An opening is formed in the flat plate 20 and is welded so as to pass through the airtight terminal 16. The flat plate 20 forms an overlapping portion in the opening forming portion of the opening of the sealed container 4. Since the glass portion 19 is prevented from being broken when the airtight terminal 16 is attached by welding, and the pressure in the sealed container 4 is increased, the deformation of the flat plate 20 to which the airtight terminal 16 is welded is suppressed. Breakage of the glass part 19 and the welded part can be prevented.
Therefore, the pressure strength of the sealed container 4 can be improved.
In addition, in the above, the opening of the flat plate 20 and the airtight container 4 (upper end plate part 2), the opening forming part and the opening are the opening peripheral part that forms the opening of the flat plate 20 or the airtight container 4 (upper end plate part 2). It is an opening forming part, and the opening and the opening forming part are combined to form an opening. The same applies to the cup-shaped metal bodies 22 and 23 which are cup-shaped bodies in the first embodiment and thereafter.

実施の形態１．
参考例１では、気密端子１６の周辺部に、別部材として、平板２０が設けられたものであるが、次に、気密端子１６の周辺部に、別部材として、カップ状体であるカップ形金属体２２を設けた実施の形態１を説明する。
図３は、本実施の形態の気密端子取付け部周辺を示す要部断面図（参考例１の図２に対応する図）である。本実施の形態では、気密端子１６を取付ける別部材が変わり、それに伴い別部材の密閉容器４への取付けが変わった以外は、参考例１と同様であり、以下、主として相違点を説明する。
別部材であるカップ形金属体２２は、底面部２２ａとこの底面部２２ａから上方に突出する側面部２２ｂとからなるカップ状体であり、上鏡板部２の鋼材より降伏点応力が大きく板厚が薄い鋼材が使用され、その底面部２２ａには開口が設けられており、この開口に気密端子１６が嵌め込まれ、気密端子１６のスカート部２１で抵抗溶接により開口を形成する開口形成部に気密状に取付けられる。即ち、このように、気密端子１６は、カップ形金属体２２の底面部２２ａの開口部に溶接により気密状に取付けられる。 Embodiment 1 FIG .
In Reference Example 1 , the flat plate 20 is provided as a separate member in the peripheral portion of the hermetic terminal 16. Next, a cup shape which is a cup-shaped body as a separate member in the peripheral portion of the hermetic terminal 16. The first embodiment provided with the metal body 22 will be described.
FIG. 3 is a sectional view (a diagram corresponding to FIG. 2 of Reference Example 1 ) showing the periphery of the hermetic terminal mounting portion according to the present embodiment. The present embodiment is the same as Reference Example 1 except that another member for attaching the hermetic terminal 16 is changed and the attachment of the other member to the sealed container 4 is changed accordingly. Hereinafter, differences will be mainly described.
The cup-shaped metal body 22, which is a separate member, is a cup-shaped body that includes a bottom surface portion 22 a and a side surface portion 22 b that protrudes upward from the bottom surface portion 22 a, and has a higher yield point stress than the steel material of the upper end plate portion 2. A thin steel material is used, and an opening is provided in the bottom surface portion 22a. The airtight terminal 16 is fitted into the opening, and the opening forming portion that forms the opening by resistance welding at the skirt portion 21 of the airtight terminal 16 is airtight. Mounted in a shape. That is, in this way, the airtight terminal 16 is attached to the opening of the bottom surface portion 22a of the cup-shaped metal body 22 in an airtight manner by welding.

また、カップ形金属体２２のカップ内径は、気密端子１６を抵抗溶接するための電極が入る程度の大きさで、側面部２２ｂの高さは上鏡板部２の板厚より大きく、上鏡板部２に設けられた開口にカップ形金属体２２をはめ込み、カップ形金属体２２の側面部２２ｂと上鏡板部２の開口を形成する開口形成部とを気密状に溶接する。このようにカップ形金属体２２の側面部２２ｂを上鏡板部２の開口部に溶接固定する。   Further, the cup inner diameter of the cup-shaped metal body 22 is large enough to contain an electrode for resistance welding the hermetic terminal 16, and the height of the side surface portion 22b is larger than the plate thickness of the upper mirror plate portion 2. The cup-shaped metal body 22 is fitted into the opening provided in 2, and the side surface portion 22 b of the cup-shaped metal body 22 and the opening forming portion that forms the opening of the upper end plate portion 2 are welded in an airtight manner. In this way, the side surface portion 22b of the cup-shaped metal body 22 is fixed to the opening of the upper end plate portion 2 by welding.

以上のように、別部材を、鋼材からなり、底面部２２ａと側面部２２ｂを有するカップ状体であるカップ形金属体２２とし、その鋼材の降伏点応力を密閉容器４（上鏡板部２）の鋼材の降伏点応力より大きくし、また、その板厚を密閉容器４（上鏡板部２）の板厚より小さくし、カップ状体の底面部２２ａに開口部を形成し、該開口部に気密端子１６を貫通するように溶接し、また、カップ状体の側面部２２ａを密閉容器４（上鏡板部２）に形成した開口部に溶接したので、気密端子１６をカップ状体２２に溶接する際、カップ状体の底面部２２ａの板厚を密閉容器４（上鏡板部２）の板厚より小さくしたことにより、溶接が小さな電流でよく、大電流によるガラス部１９の割れを防ぐことができ、また、溶接部の安定した溶接強度を確保できる。
また、別部材をカップ状体とし、カップ状体の側面部２２ｂを密閉容器４（上鏡板部２）に形成した開口部に溶接し（構造的に剛性を大きくする効果）、かつ、カップ状体を密閉容器４（上鏡板部２）より降伏点応力が大きい鋼材とした（材質的に剛性を大きくする効果）ことにより、密閉容器４内の圧力が上昇した場合に、カップ状体の剛性が大きく、変形が抑えられ、気密端子１６のガラス部１９や気密端子１６とカップ状体との溶接部の破壊が防止できる。
よって、密閉容器４の耐圧強度を向上させることができる。 As described above, another member is made of a steel material, and is a cup-shaped metal body 22 which is a cup-shaped body having a bottom surface portion 22a and a side surface portion 22b, and the yield point stress of the steel material is determined as a sealed container 4 (upper end plate portion 2). Is made larger than the yield point stress of the steel material, and the plate thickness is made smaller than the plate thickness of the sealed container 4 (upper end plate portion 2), and an opening is formed in the bottom surface portion 22a of the cup-shaped body. Since welding is performed so as to penetrate the airtight terminal 16 and the side surface portion 22a of the cup-shaped body is welded to the opening formed in the sealed container 4 (upper end plate portion 2), the airtight terminal 16 is welded to the cup-shaped body 22. When the thickness of the bottom surface portion 22a of the cup-shaped body is made smaller than the thickness of the hermetic container 4 (upper end plate portion 2), welding can be performed with a small current, and the glass portion 19 can be prevented from cracking due to a large current. It can also ensure stable welding strength of the weld. That.
Further, another member is a cup-shaped body, and the side surface portion 22b of the cup-shaped body is welded to an opening formed in the sealed container 4 (upper end plate portion 2) (an effect of structurally increasing rigidity), and the cup shape The rigidity of the cup-shaped body when the pressure in the sealed container 4 rises by making the body a steel material having a higher yield point stress than the sealed container 4 (upper end plate part 2) (effect of increasing the rigidity of the material) Is large and deformation is suppressed, and breakage of the glass portion 19 of the airtight terminal 16 or the welded portion between the airtight terminal 16 and the cup-shaped body can be prevented.
Therefore, the pressure strength of the sealed container 4 can be improved.

実施の形態２．
本実施の形態の密閉圧縮機は、実施の形態１の密閉圧縮機のカップ状体であるカップ形金属体２２を別のカップ状体であるカップ形金属体２３としたもので、その他の構成等は、実施の形態１と同様であるので、以下、主として相違点を説明する。
図４は、本実施の形態の気密端子取付け部周辺を示す要部断面図（実施の形態１の図３に対応する図）である。
本実施の形態のカップ形金属体２３は、密閉容器４と同じ鋼材又は降伏点応力が同程度の鋼材が使用され、底面部２３ａとこの底面部２３ａから上方に突出する側面部２３ｂとからなり、側面部２３ｂの板厚は上鏡板部２の板厚と同等以上で、底面部２３ａの板厚は上鏡板部２の板厚より薄くする。
また、実施の形態１のカップ形金属体２２と同様に、その底面部２３ａには開口が設けられ、この開口に気密端子１６が嵌め込まれ、気密端子１６のスカート部２１で抵抗溶接により気密状に取り付けられる。カップ形金属体２３は、そのカップ内径が気密端子１６を抵抗溶接するための電極が入る程度の大きさで、側面部２３ｂの高さは上鏡板部２の板厚より大きく、上鏡板部２に設けられた開口部にカップ形金属体２３の側面部２３ｂが気密状に溶接固定される。 Embodiment 2 FIG .
The hermetic compressor of the present embodiment is obtained by changing the cup-shaped metal body 22 that is the cup-shaped body of the hermetic compressor of the first embodiment into a cup-shaped metal body 23 that is another cup-shaped body. Since these are the same as those in the first embodiment , the differences will be mainly described below.
FIG. 4 is a cross-sectional view of the main part showing the periphery of the hermetic terminal mounting portion of the present embodiment (a diagram corresponding to FIG. 3 of the first embodiment ).
The cup-shaped metal body 23 of the present embodiment is made of the same steel material as that of the sealed container 4 or a steel material having the same yield stress, and includes a bottom surface portion 23a and a side surface portion 23b protruding upward from the bottom surface portion 23a. The plate thickness of the side surface portion 23b is equal to or greater than the plate thickness of the upper end plate portion 2, and the plate thickness of the bottom portion 23a is made thinner than the plate thickness of the upper end plate portion 2.
Similarly to the cup-shaped metal body 22 of the first embodiment, an opening is provided in the bottom surface portion 23a, and the airtight terminal 16 is fitted into the opening, and the airtight terminal 16 is sealed by resistance welding at the skirt portion 21 of the airtight terminal 16. Attached to. The cup-shaped metal body 23 has a cup inner diameter that is large enough to receive an electrode for resistance welding the hermetic terminal 16, and the height of the side surface portion 23 b is larger than the plate thickness of the upper mirror plate portion 2. The side surface part 23b of the cup-shaped metal body 23 is welded and fixed in an airtight manner to the opening part provided in the container.

以上のように、別部材を、密閉容器４の材質と同じ鋼材又は降伏点応力が同程度の鋼材からなり、底面部２３ａと側面部２３ｂを有するカップ状体であるカップ形金属体２３とし、底面部２３ａの板厚を密閉容器４（上鏡板部２）の板厚より小さく、また、側面部２３ｂの板厚を密閉容器４（上鏡板部２）の板厚以上とし、カップ状体の底面部２３ａに開口部を形成し、該開口部に気密端子１６を貫通するように溶接し、また、カップ状体の側面部２３ｂを密閉容器４（上鏡板部２）に形成した開口部に溶接したので、気密端子１６をカップ状体２３に溶接する際、カップ状体の底面部２３ａの板厚を密閉容器４（上鏡板部２）の板厚より小さくしたことにより、溶接が小さな電流でよく、大電流によるガラス部１９の割れを防ぐことができ、また、溶接部の安定した溶接強度を確保できる。
また、カップ状体の板厚を密閉容器４（上鏡板部２）の板厚以上とした側面部２３ｂを密閉容器４（上鏡板部２）に形成した開口部に溶接したこと（構造的に剛性を大きくする効果）により、密閉容器４内の圧力が上昇した場合に、カップ状体の剛性が大きく、変形が抑えられ、気密端子１６のガラス部１９や気密端子１６とカップ状体との溶接部の破壊が防止できる。
よって、密閉容器４の耐圧強度を向上させることができる。 As described above, another member is made of the same steel material as the material of the sealed container 4 or a steel material having the same yield point stress, and is a cup-shaped metal body 23 that is a cup-shaped body having a bottom surface portion 23a and a side surface portion 23b. The plate thickness of the bottom surface portion 23a is smaller than the plate thickness of the sealed container 4 (upper end plate portion 2), and the plate thickness of the side surface portion 23b is set to be equal to or greater than the plate thickness of the closed vessel 4 (upper end plate portion 2). An opening is formed in the bottom surface portion 23a, welded so as to pass through the airtight terminal 16, and the side surface portion 23b of the cup-like body is formed in the opening formed in the sealed container 4 (upper end plate portion 2). Since welding is performed, when the hermetic terminal 16 is welded to the cup-shaped body 23, the thickness of the bottom surface portion 23a of the cup-shaped body is made smaller than the plate thickness of the hermetic container 4 (upper end plate portion 2), so that the welding current is small. And can prevent the glass part 19 from being broken by a large current. Moreover, it ensures stable welding strength of the welded portion.
In addition, the side surface portion 23b having a cup-like body thickness equal to or greater than the thickness of the sealed container 4 (upper end plate part 2) is welded to the opening formed in the closed container 4 (upper end plate part 2) (structurally). When the pressure in the sealed container 4 rises due to the effect of increasing the rigidity, the rigidity of the cup-shaped body is large and deformation is suppressed, and the glass portion 19 of the hermetic terminal 16 or the hermetic terminal 16 and the cup-shaped body Destruction of the weld can be prevented.
Therefore, the pressure strength of the sealed container 4 can be improved.

実施の形態３．
本実施の形態の密閉型圧縮機は、実施の形態１，２の密閉型圧縮機において、気密端子１６に保護カバー２５を取付けたもので、この保護カバー２５をカップ状体であるカップ形金属体２２又はカップ形金属体２３の側面部２２ｂ、２３ｂに取付けたバンド２６により固定したものである。その他の構成等は、実施の形態１，２と同様である。
図５は、図２の密閉型圧縮機に保護カバーを取付けた状態を示す要部断面図である。
図５に示すように、カップ形金属体２２の側面部２２ｂの上部には孔２２ｃが設けられており、その孔２２ｃに気密端子１６の保護カバー２５を止めるためのバンド２６が固定されている。このバンド２６の弾性力により、気密端子１６を上から覆う保護カバー２５をカップ形金属体２２のカップ内で、その底面部２２ａに押し付け固定する。 Embodiment 3 FIG .
The hermetic compressor of the present embodiment is the same as the hermetic compressors of the first and second embodiments , except that a protective cover 25 is attached to the airtight terminal 16, and this protective cover 25 is a cup-shaped metal that is a cup-shaped body. It is fixed by a band 26 attached to the side surface portions 22b and 23b of the body 22 or the cup-shaped metal body 23. Other configurations are the same as those in the first and second embodiments .
FIG. 5 is a cross-sectional view of a main part showing a state where a protective cover is attached to the hermetic compressor of FIG.
As shown in FIG. 5, a hole 22c is provided in the upper part of the side surface portion 22b of the cup-shaped metal body 22, and a band 26 for fixing the protective cover 25 of the airtight terminal 16 is fixed to the hole 22c. . Due to the elastic force of the band 26, the protective cover 25 covering the airtight terminal 16 from above is pressed and fixed to the bottom surface portion 22 a in the cup of the cup-shaped metal body 22.

以上のように、カップ形金属体２２の側面部２２ｂを利用してバンド２６を取付け、バンド２６により気密端子１６覆う保護カバー２５を固定するので、即ち、カップ状体を気密端子１６の保護カバー２５の取付具として使用するので、部品点数を削減し、コストアップを抑えて、気密端子１６を保護することができる。   As described above, the band 26 is attached using the side surface portion 22b of the cup-shaped metal body 22, and the protective cover 25 covering the hermetic terminal 16 is fixed by the band 26. That is, the cup-shaped body is protected by the protective cover of the hermetic terminal 16. Since it is used as a fixture of 25, the number of parts can be reduced, the cost increase can be suppressed, and the hermetic terminal 16 can be protected.

実施の形態４及び参考例２．
本実施の形態４及び参考例２の密閉型圧縮機は、参考例１、実施の形態１〜３の密閉型圧縮機において、気密端子１６を取付けた別部材である平板２０、カップ状体であるカップ形金属体２２、２３を密閉容器の上鏡板部２の中心付近に取り付けたものである。なお、気密端子１６を取付けた別部材である平板２０を密閉容器の上鏡板部２の中心付近に取り付けたものを参考例２とし、気密端子１６を取付けた別部材であるカップ形金属体２２、２３を密閉容器の上鏡板部２の中心付近に取り付けたものを実施の形態４とする。（図６は、参考例２の要部断面図を示す）。その他の構成等は、参考例１、実施の形態１〜３と同様である。
本実施の形態４及び参考例２のように、密閉容器４の上鏡板部２の中心部に密閉端子１６を取付けたことにより、密閉容器４内の圧力が上昇したとき、上鏡板部２は球形状に膨らむため、平板２０等の別部材及び気密端子１６に対して応力が均等に生じる。そこで、気密端子１６のガラス部１９や溶接部の応力を緩和でき、密閉容器４の耐圧強度を向上させることができる。 Embodiment 4 and Reference Example 2
The hermetic compressors of the fourth embodiment and the reference example 2 are the flat plate 20 and the cup-shaped body which are separate members to which the hermetic terminal 16 is attached in the hermetic compressors of the first reference example and the first to third embodiments. A cup-shaped metal body 22, 23 is attached near the center of the upper end plate 2 of the sealed container . In addition, what attached the flat plate 20 which is another member to which the airtight terminal 16 was attached to the vicinity of the center of the upper end plate part 2 of the sealed container is referred to as Reference Example 2, and a cup-shaped metal body 22 which is another member to which the airtight terminal 16 is attached. , 23 attached to the vicinity of the center of the upper end plate part 2 of the sealed container is referred to as a fourth embodiment. (FIG. 6 shows a cross-sectional view of the main part of Reference Example 2 ). Other configurations are the same as those in Reference Example 1 and Embodiments 1 to 3 .
As in Embodiment 4 and Reference Example 2 , when the sealed terminal 16 is attached to the center of the upper end plate part 2 of the closed container 4 and the pressure in the closed container 4 rises, the upper end plate part 2 is Since it swells into a spherical shape, stress is evenly generated on another member such as the flat plate 20 and the airtight terminal 16. Therefore, the stress of the glass part 19 and the welded part of the hermetic terminal 16 can be relaxed, and the pressure resistance of the sealed container 4 can be improved.

実施の形態５及び参考例３．
次に、本実施の形態５及び参考例３の密閉型圧縮機は、参考例１，２、実施の形態１〜４において、気密端子１６を密閉容器４の上鏡板部２に取付け、この上鏡板部２の形状を平坦部を有する略球形状（略球形状の一部）としたものである。なお、気密端子１６を取付けた別部材である平板２０を密閉容器４の上鏡板部２に取り付けたものを参考例３とし、気密端子１６を取付けた別部材であるカップ形金属体２２、２３を密閉容器４の上鏡板部２に取り付けたものを実施の形態５とする。（図７は、参考例３の要部断面図を示す）。
略球形状にすることにより、密閉容器４内の圧力が上昇すると、上鏡板部２は球形状に膨らむため、変形が小さく抑えられ、平板２０等の別部材及び気密端子１６に生じる応力が小さい。そこで、密閉容器４の耐圧強度を向上させることができる。 Embodiment 5 and Reference Example 3
Next, in the hermetic compressors of the fifth embodiment and the reference example 3 , the airtight terminal 16 is attached to the upper end plate part 2 of the sealed container 4 in the reference examples 1 and 2 and the first to fourth embodiments. The shape of the end plate portion 2 is a substantially spherical shape having a flat portion (a part of a substantially spherical shape) . In addition, what attached the flat plate 20 which is another member which attached the airtight terminal 16 to the upper end plate part 2 of the airtight container 4 is made into the reference example 3, and the cup-shaped metal bodies 22 and 23 which are another members which attached the airtight terminal 16 are used. In the fifth embodiment, this is attached to the upper end plate portion 2 of the sealed container 4. (Figure 7 shows a cross sectional view of Reference Example 3).
When the pressure in the hermetic container 4 increases due to the substantially spherical shape, the upper end plate portion 2 swells into a spherical shape, so that the deformation is suppressed to a small level, and the stress generated in another member such as the flat plate 20 and the airtight terminal 16 is small. . Therefore, the pressure strength of the sealed container 4 can be improved.

上記のそれぞれの実施の形態及び参考例では、密閉型圧縮機をロータリ圧縮機の例で説明したが、本発明の密閉容器４の耐圧強度を向上させる技術は、ロータリ圧縮機に限らず、スクロール圧縮機等その他の密閉型圧縮機に広く利用できる。 In each of the above-described embodiments and reference examples , the hermetic compressor has been described as an example of a rotary compressor. However, the technology for improving the pressure resistance of the hermetic container 4 according to the present invention is not limited to the rotary compressor, but a scroll. It can be widely used for other hermetic compressors such as compressors.

本発明の参考例１における密閉型圧縮機を示す断面図である。It is sectional drawing which shows the hermetic compressor in the reference example 1 of this invention. 本発明の参考例１における気密端子周辺部を示す断面図である。It is sectional drawing which shows the airtight terminal periphery part in the reference example 1 of this invention. 本発明の実施の形態１における気密端子周辺部を示す断面図である。It is sectional drawing which shows the airtight terminal periphery part in Embodiment 1 of this invention. 本発明の実施の形態２における気密端子周辺部を示す断面図である。It is sectional drawing which shows the airtight terminal periphery part in Embodiment 2 of this invention. 本発明の実施の形態３における気密端子周辺部を示す断面図である。It is sectional drawing which shows the airtight terminal periphery part in Embodiment 3 of this invention. 本発明の参考例２における上鏡板部を示す断面図である。It is sectional drawing which shows the upper end plate part in the reference example 2 of this invention. 本発明の参考例３における上鏡板部を示す断面図である。It is sectional drawing which shows the upper end plate part in the reference example 3 of this invention.

１ 密閉容器胴部、２ 密閉容器上鏡板部、３ 密閉容器下鏡板部、４ 密閉容器、１０ 圧縮機構、１３ 電動機、１６ 気密端子、２０ 別部材（平板）、２２ 別部材（カップ状体）、２２ａ 底面部、２２ｂ 側面部、２３ 別部材（カップ状体）、２５ 保護カバー。   DESCRIPTION OF SYMBOLS 1 Airtight container body part, 2 Airtight container upper end plate part, 3 Airtight container lower end plate part, 4 Airtight container, 10 Compression mechanism, 13 Electric motor, 16 Airtight terminal, 20 Separate member (flat plate), 22 Separate member (cup-shaped body) 22a Bottom part, 22b Side part, 23 Separate member (cup-shaped body), 25 Protective cover.

Claims (7)

密閉容器内に、圧縮機構及びその圧縮機構を駆動する電動機を収容し、また、別部材に開口部を形成し、該開口部に、前記電動機に電力を供給する気密端子を前記開口部を貫通するように取付け、さらに、前記別部材を前記密閉容器に形成した開口部に取付けることにより、前記気密端子を前記別部材を介して、前記密閉容器を貫通して該密閉容器に取付けた密閉型圧縮機において、
前記別部材は、鋼材からなり、底面部と側面部を有するカップ状体であり、その鋼材の降伏点応力を前記密閉容器の鋼材の降伏点応力より大きくし、また、その板厚を前記密閉容器の板厚より小さくするとともに、
前記カップ状体の底面部に前記別部材の開口部を形成し、
前記気密端子の前記別部材への取付けは、前記気密端子を前記別部材の開口部を貫通させ、前記気密端子と前記別部材の開口形成部との溶接で行い、
前記カップ状体は前記側面部で前記密閉容器に溶接固定されたことを特徴とする密閉型圧縮機。 A compression mechanism and an electric motor that drives the compression mechanism are accommodated in a sealed container, and an opening is formed in another member, and an airtight terminal that supplies electric power to the electric motor passes through the opening. Further, by attaching the separate member to the opening formed in the sealed container, the hermetic terminal is attached to the sealed container through the separate member and passing through the sealed container. In the compressor,
The separate member is made of steel and is a cup-shaped body having a bottom surface portion and a side surface portion. The yield point stress of the steel material is larger than the yield point stress of the steel material of the sealed container, and the plate thickness thereof is sealed. While making it smaller than the thickness of the container,
Forming an opening of the separate member on the bottom surface of the cup-shaped body;
The mounting of the airtight terminal to the separate member is performed by welding the airtight terminal and the opening forming portion of the separate member through the opening of the separate member,
Tightly closed compressor said cup-shaped body is you characterized in that it is welded to the closed container at the side portion. 密閉容器内に、圧縮機構及びその圧縮機構を駆動する電動機を収容し、また、別部材に開口部を形成し、該開口部に、前記電動機に電力を供給する気密端子を前記開口部を貫通するように取付け、さらに、前記別部材を前記密閉容器に形成した開口部に取付けることにより、前記気密端子を前記別部材を介して、前記密閉容器を貫通して該密閉容器に取付けた密閉型圧縮機において、
前記別部材が、前記密閉容器の材質と同じ鋼材からなり、底面部と側面部を有するカップ状体であり、前記底面部の板厚が前記密閉容器の板厚より小さく、また、前記側面部の板厚が前記密閉容器の板厚以上とするとともに、
前記カップ状体の底面部に前記開口部を形成し、
前記気密端子の前記別部材への取付けは、前記気密端子を前記別部材の開口部を貫通させ、前記気密端子と前記別部材の開口形成部との溶接で行い、
前記カップ状体は前記側面部で前記密閉容器に溶接固定されたことを特徴とする密閉型圧縮機。 A compression mechanism and an electric motor that drives the compression mechanism are accommodated in a sealed container, and an opening is formed in another member, and an airtight terminal that supplies electric power to the electric motor passes through the opening. Further, by attaching the separate member to the opening formed in the sealed container, the hermetic terminal is attached to the sealed container through the separate member and passing through the sealed container. In the compressor,
The separate member, the sealed container of a material with the same steel material or Rannahli a cup-shaped body having a bottom portion and side portions, the plate thickness of the bottom portion is smaller than the thickness of said closed container, also, the While the plate thickness of the side portion is equal to or greater than the plate thickness of the sealed container,
Forming the opening in the bottom of the cup-shaped body;
The mounting of the airtight terminal to the separate member is performed by welding the airtight terminal and the opening forming portion of the separate member through the opening of the separate member,
Tightly closed compressor said cup-shaped body is you characterized in that it is welded to the closed container at the side portion. 前記カップ状体が前記気密端子の保護カバーの取付具として使用されることを特徴とする請求項１又は請求項２に記載の密閉型圧縮機。 The hermetic compressor according to claim 1 or 2 , wherein the cup-like body is used as an attachment for a protective cover of the hermetic terminal. 前記密閉容器は上鏡板部を備え、前記密閉容器の開口部を、該上鏡板部に形成したことを特徴とする請求項１〜請求項３のいずれかの請求項に記載の密閉型圧縮機。 The sealed container includes an upper end plate, the opening of the closed container, hermetic compressor according to any one of claims 1 to claim 3, characterized in that formed in the upper end plate portion . 前記気密端子を取り付けた前記別部材が前記上鏡板部の中心部に取付けられたことを特徴とする請求項４に記載の密閉型圧縮機。 5. The hermetic compressor according to claim 4 , wherein the separate member to which the hermetic terminal is attached is attached to a central portion of the upper end plate portion. 前記気密端子を取り付けた前記別部材が取り付けられた前記上鏡板部が前記開口部を形成した平坦部を有する略球形状であることを特徴とする請求項４又は請求項５に記載の密閉型圧縮機。 The sealed mold according to claim 4 or 5 , wherein the upper end plate portion to which the separate member to which the hermetic terminal is attached is attached has a substantially spherical shape having a flat portion in which the opening is formed. Compressor. 使用冷媒が二酸化炭素であることを特徴とする請求項１〜請求項６のいずれかの請求項に記載の密閉型圧縮機。 The hermetic compressor according to any one of claims 1 to 6 , wherein the refrigerant used is carbon dioxide.
JP2004176887A 2004-06-15 2004-06-15 Hermetic compressor Expired - Fee Related JP4395013B2 (en)

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