JP2012021401A - Sealed compressor - Google Patents

Sealed compressor Download PDF

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JP2012021401A
JP2012021401A JP2010157457A JP2010157457A JP2012021401A JP 2012021401 A JP2012021401 A JP 2012021401A JP 2010157457 A JP2010157457 A JP 2010157457A JP 2010157457 A JP2010157457 A JP 2010157457A JP 2012021401 A JP2012021401 A JP 2012021401A
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Prior art keywords
slot
sectional area
discharge hole
cross
hermetic compressor
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JP5533373B2 (en
Inventor
Kosei Sakimoto
孝正 先本
Hiroshi Sugiura
洋 杉浦
Yasuo Nanbu
靖生 南部
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Panasonic Corp
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Panasonic Corp
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  • Compressor (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

PROBLEM TO BE SOLVED: To solve the problem that liquid refrigerant spouts out with great force from a vent hole on a valve cover of a compressor toward a slot of a motor stator on an upper part of the valve cover, and the impact force of the spout moves an insulating paper in the slot to cause a failure, when an excessive liquid returning operation is performed during a compressor operation.SOLUTION: In Fig.2, a position where the vent hole 6 and the slot 2 overlap is constituted of a small slot 7 of which a cross section is smaller than that of the slot 2, and thereby a movement of the insulating paper is suppressed even when the liquid refrigerant collides during liquid compression and reliability is improved.

Description

本発明は、空気調和器や冷蔵庫等の冷凍機器に用いられる密閉型圧縮機に関するものである。   The present invention relates to a hermetic compressor used in refrigeration equipment such as an air conditioner and a refrigerator.

従来から密閉型圧縮機について、内蔵されているモータ固定子のスロット部には巻線との絶縁性を保持する為に絶縁紙が挿入されている。   Conventionally, in a hermetic compressor, an insulating paper is inserted in a slot portion of a built-in motor stator in order to maintain insulation from a winding.

図4は、従来のモータ固定子のスロット部を表しており、モータ固定子101にあるスロット102には巻線103との絶縁性を保持する為に絶縁紙104が挿入されている。   FIG. 4 shows a slot portion of a conventional motor stator, and an insulating paper 104 is inserted into the slot 102 of the motor stator 101 in order to maintain insulation from the winding 103.

特開2003−324880号公報JP 2003-324880 A

しかしながら圧縮機運転時において過度な液戻り運転が行われた場合、圧縮機のバルブカバーにある吐出穴から液冷媒が、バルブカバー上部にあるモータ固定子のスロットに向かい勢いよく噴出され、その衝撃力で絶縁紙がスロット内を動き故障原因となる課題があった。   However, if excessive liquid return operation is performed during compressor operation, liquid refrigerant is ejected from the discharge hole in the valve cover of the compressor toward the slot of the motor stator at the top of the valve cover. There was a problem that the insulation paper moved in the slot by force and caused failure.

本発明は、前記従来の課題を解決するもので、バルブカバーにある吐出穴上部にあるスロット部分の絶縁紙の動きを抑制し、故障原因とならない密閉型圧縮機を提供することを目的とする。   The present invention solves the above-described conventional problems, and an object thereof is to provide a hermetic compressor that suppresses the movement of the insulating paper in the slot portion above the discharge hole in the valve cover and does not cause failure. .

前記従来の課題を解決するため本発明の密閉型圧縮機は、バルブカバーにある吐出穴上部に存在するスロット内における巻線の占める断面積割合を、吐出穴上部に存在しないスロット内における断面積割合より小さくさせたものである。   In order to solve the above-mentioned conventional problems, the hermetic compressor of the present invention is configured such that the cross-sectional area ratio occupied by the winding in the slot existing above the discharge hole in the valve cover is the cross-sectional area in the slot not existing above the discharge hole. It is made smaller than the ratio.

これによって吐出穴上部にあるスロットは、仮に過度な液戻りが生じ、液冷媒がスロットに向って噴出された場合でも、スロット内の巻線の断面積割合が大きくすることで、絶縁紙がスロット内を動くことを抑制でき、故障を発生させないようにできる。   As a result, the slot at the top of the discharge hole causes excessive liquid return, and even if liquid refrigerant is ejected toward the slot, the cross-sectional area ratio of the winding in the slot is increased, so that the insulating paper becomes the slot. It is possible to suppress the movement in the interior and prevent a failure from occurring.

本発明の密閉型圧縮機は絶縁性を損なわず、高信頼性を確保できる効果をもたらすことができる。   The hermetic compressor of the present invention can bring about an effect of ensuring high reliability without impairing the insulating properties.

本発明実施の形態1における密閉型圧縮機を示す断面図Sectional drawing which shows the hermetic compressor in Embodiment 1 of this invention 本発明実施の形態1におけるバルブカバー吐出穴とスロットの位置関係を示す図The figure which shows the positional relationship of the valve cover discharge hole and slot in Embodiment 1 of this invention. 図2におけるA部拡大図Part A enlarged view in FIG. 本発明の実施の形態2におけるスロット部の巻線の占める断面積割合を示す図The figure which shows the cross-sectional area ratio for which the coil | winding of the slot part in Embodiment 2 of this invention occupies 従来の密閉型圧縮機におけるスロット部の概略図Schematic of slot part in conventional hermetic compressor 図5におけるB部拡大図Part B enlarged view in FIG.

第1の発明はバルブカバー吐出穴上部に位置するモータ固定子のスロット断面積が、吐出穴上部以外の位置にあるスロット断面積より小さく構成されている。   In the first invention, the slot cross-sectional area of the motor stator located above the valve cover discharge hole is configured to be smaller than the slot cross-sectional area located at a position other than the top of the discharge hole.

バルブカバー吐出穴上部に位置するスロットは、断面積を小さくすることにより巻線の占める断面積をスロット断面積で除した数値(以下スペースファクタと呼ぶ)が大きくなる。このスペースファクタを大きくすることで、液圧縮の衝撃により液冷媒が直接スロットに向けて噴出されても、絶縁紙の動きを抑制することができ信頼性を高める効果がある。   The slot located in the upper part of the valve cover discharge hole has a larger value (hereinafter referred to as a space factor) obtained by dividing the sectional area occupied by the winding by the slot sectional area by reducing the sectional area. By increasing this space factor, even if the liquid refrigerant is directly ejected toward the slot due to the impact of liquid compression, the movement of the insulating paper can be suppressed and the reliability can be improved.

第2の発明はバルブカバー吐出穴上部に位置するモータ固定子のスロットにおける巻線の占める断面積を吐出穴上部以外の位置にあるスロットにおける巻線の占める断面積より大きくする。これは言い換えるとスロット断面積は固定したまま、スペースファクタを大きくするものであり、第1の発明と同様の効果を得ることができる。なお、この実施の形態によって本発明が限定されるものではない。   In the second aspect of the invention, the cross-sectional area occupied by the winding in the slot of the motor stator located above the valve cover discharge hole is made larger than the cross-sectional area occupied by the winding in the slot located at a position other than the upper discharge hole. In other words, the space factor is increased while the slot cross-sectional area is fixed, and the same effect as that of the first invention can be obtained. Note that the present invention is not limited to the embodiments.

(実施の形態1)
図1は、本発明の実施の形態1におけるバルブカバーとモータ固定子との位置関係を示すものである。
(Embodiment 1)
FIG. 1 shows the positional relationship between the valve cover and the motor stator in the first embodiment of the present invention.

図1において上軸受12、シリンダ13、ピストン14、下軸受15、ベーン(図示せず)で囲まれる圧縮室17に入った冷媒は、シャフト16に勘合されたモータのロータ11が回転することで、シャフト16外周部に嵌められたピストン14の外周部がシリンダ13の内周部に沿うかたちで回転することにより圧縮される。圧縮された冷媒は吐出ポート(図示せず)より吐出され、一旦、バルブカバー5の中に冷媒が導かれた後、吐出穴6からモータ固定子1の方向に噴出される。   In FIG. 1, the refrigerant that has entered the compression chamber 17 surrounded by the upper bearing 12, the cylinder 13, the piston 14, the lower bearing 15, and the vane (not shown) rotates the rotor 11 of the motor fitted into the shaft 16. The outer peripheral portion of the piston 14 fitted to the outer peripheral portion of the shaft 16 is compressed by rotating along the inner peripheral portion of the cylinder 13. The compressed refrigerant is discharged from a discharge port (not shown), and once the refrigerant is introduced into the valve cover 5, it is discharged from the discharge hole 6 toward the motor stator 1.

図2は、図1にあるバルブカバー5および吐出穴6とモータ固定子1にあるスロット2の位置関係を圧縮機上部からみたものであり、吐出穴6とスロット2が重なる位置についてはスロット2より断面積の小さい小スロット7で構成されている。   FIG. 2 shows the positional relationship between the valve cover 5 and the discharge hole 6 in FIG. 1 and the slot 2 in the motor stator 1 from the top of the compressor, and the position where the discharge hole 6 and the slot 2 overlap is shown in the slot 2. The small slot 7 has a smaller cross-sectional area.

密閉型圧縮機が寝込み起動や再起動を行うような場合、過渡的に液冷媒が圧縮され吐出穴6から鉛直方向に噴出され、小スロット7に衝突する。このとき小スロット7はスロット2に対して断面積が小さく、スペースファクタを大きくとっているため液圧縮の衝撃に対しても絶縁紙4の動きを抑制することができ信頼性を高めることが可能となる。   When the hermetic compressor stagnates or restarts, the liquid refrigerant is transiently compressed and ejected from the discharge hole 6 in the vertical direction and collides with the small slot 7. At this time, since the small slot 7 has a smaller cross-sectional area than the slot 2 and has a large space factor, the movement of the insulating paper 4 can be suppressed against the impact of liquid compression, and the reliability can be improved. It becomes.

(実施の形態2)
図3は、本発明の実施の形態2におけるスロット部の巻線3の占める断面積割合を示しており、吐出穴6とスロット2が重なる位置についての巻線3の占める断面積割合aは、吐出穴6とスロット2が重なっていない位置についての巻線の占める断面積割合bより大きくしている。スペースファクタa>bとなり液圧縮の衝撃に対しても絶縁紙4の動きを抑制することができ信頼性を高めることが可能となる。
(Embodiment 2)
FIG. 3 shows the cross-sectional area ratio occupied by the winding 3 in the slot portion in Embodiment 2 of the present invention, and the cross-sectional area ratio a occupied by the winding 3 at the position where the discharge hole 6 and the slot 2 overlap is The cross-sectional area ratio b occupied by the winding at the position where the discharge hole 6 and the slot 2 do not overlap is larger. Since the space factor a> b, the movement of the insulating paper 4 can be suppressed against the impact of liquid compression, and the reliability can be improved.

以上のように、本発明にかかる密閉型圧縮機は、絶縁紙の動きを抑制し信頼性を高めることが可能となるので空気調和器や冷蔵庫等の冷凍機器に用いられる密閉型圧縮機の用途に適用できる。   As described above, since the hermetic compressor according to the present invention can improve the reliability by suppressing the movement of the insulating paper, the use of the hermetic compressor used in refrigeration equipment such as an air conditioner and a refrigerator. Applicable to.

1 モータ固定子
2 スロット
3 巻線
4 絶縁紙
5 バルブカバー
6 吐出穴
7 小スロット
11 ロータ
12 上軸受
13 シリンダ
14 ピストン
15 下軸受
16 シャフト
17 圧縮室
101 モータ固定子
102 スロット
103 巻線
104 絶縁紙
DESCRIPTION OF SYMBOLS 1 Motor stator 2 Slot 3 Winding 4 Insulating paper 5 Valve cover 6 Discharge hole 7 Small slot 11 Rotor 12 Upper bearing 13 Cylinder 14 Piston 15 Lower bearing 16 Shaft 17 Compression chamber 101 Motor stator 102 Slot 103 Winding 104 Insulating paper

Claims (6)

バルブカバー吐出穴上部に位置するモータ固定子のスロット断面積が、吐出穴上部以外の位置にあるスロット断面積より小さく構成されているモータ固定子を有する密閉型圧縮機。 A hermetic compressor having a motor stator in which a slot cross-sectional area of a motor stator located above a valve cover discharge hole is smaller than a slot cross-sectional area located at a position other than the top of the discharge hole. 塩素を含まないHCFCやHFC等を冷媒とした請求項1記載の密閉型圧縮機。 The hermetic compressor according to claim 1, wherein HCFC, HFC or the like not containing chlorine is used as a refrigerant. 二酸化炭素やアンモニア等の自然冷媒を冷媒とした請求項1記載の密閉型圧縮機。 The hermetic compressor according to claim 1, wherein a natural refrigerant such as carbon dioxide or ammonia is used as a refrigerant. バルブカバー吐出穴上部に位置するモータ固定子のスロットにおける巻線の占める断面積割合をaとし、吐出穴上部以外の位置にあるスロットにおける巻線の占める断面積割合をbとしたときにa>bの関係であり、スロット断面積は同じであるモータ固定子を有する密閉型圧縮機。 When the cross-sectional area ratio occupied by the winding in the slot of the motor stator positioned above the valve cover discharge hole is a and the cross-sectional area ratio occupied by the winding in the slot located at a position other than the upper discharge hole is b> a> A hermetic compressor having a motor stator having the same slot cross-sectional area as shown in b. 塩素を含まないHCFCやHFC等を冷媒とした請求項4記載の密閉型圧縮機。 The hermetic compressor according to claim 4, wherein HCFC, HFC or the like not containing chlorine is used as a refrigerant. 二酸化炭素やアンモニア等の自然冷媒を冷媒とした請求項4記載の密閉型圧縮機。 The hermetic compressor according to claim 4, wherein a natural refrigerant such as carbon dioxide or ammonia is used as a refrigerant.
JP2010157457A 2010-07-12 2010-07-12 Hermetic compressor Expired - Fee Related JP5533373B2 (en)

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JP2010157457A JP5533373B2 (en) 2010-07-12 2010-07-12 Hermetic compressor

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JP2012021401A true JP2012021401A (en) 2012-02-02
JP5533373B2 JP5533373B2 (en) 2014-06-25

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008144675A (en) * 2006-12-11 2008-06-26 Daikin Ind Ltd Compressor
JP2009216025A (en) * 2008-03-12 2009-09-24 Panasonic Corp Hermetic compressor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008144675A (en) * 2006-12-11 2008-06-26 Daikin Ind Ltd Compressor
JP2009216025A (en) * 2008-03-12 2009-09-24 Panasonic Corp Hermetic compressor

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