JP2769600B2 - Protector for hermetic electric compressor - Google Patents
Protector for hermetic electric compressorInfo
- Publication number
- JP2769600B2 JP2769600B2 JP6052917A JP5291794A JP2769600B2 JP 2769600 B2 JP2769600 B2 JP 2769600B2 JP 6052917 A JP6052917 A JP 6052917A JP 5291794 A JP5291794 A JP 5291794A JP 2769600 B2 JP2769600 B2 JP 2769600B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- thermally responsive
- responsive switch
- holder
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Motor Or Generator Frames (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この出願は密閉形電動圧縮機に使
用されるプロテクタに関するものであり、取付けが容易
で且つ信頼性の高いプロテクタを得ることを目的とす
る。BACKGROUND OF THE INVENTION 1. Field of the Invention This application relates to a protector for use in a hermetic electric compressor, and an object thereof is to provide a protector which can be easily mounted and has high reliability.
【０００２】[0002]
【従来の技術】従来から密閉形電動圧縮機の過負荷等に
よる過熱から保護する為にプロテクタが使用されている
が、その中でも電動機や冷媒に対する熱交換関係の良さ
から密閉形電動圧縮機の密閉ハウジング内に取り付けら
れる熱応動開閉器を使用したものがある。この熱応動開
閉器の取付けは例えば実開昭５５−８７１７０号公報等
に従来例として示されている如く電動機のコイルに縛り
紐によって固定されたものや、実開昭６０−９５１８３
号公報の「密閉形圧縮機の過負荷保護装置」に示された
様に弾性体によってハウジング内部に取り付けられたも
のがある。2. Description of the Related Art Conventionally, protectors have been used to protect the hermetic electric compressor from overheating due to overload and the like. Among them, the hermetic electric compressor has been hermetically sealed because of its good heat exchange relationship with the electric motor and refrigerant. Some use a thermally responsive switch mounted in a housing . The heat-responsive switch may be mounted on a motor coil fixed by a tie string as shown in a conventional example in Japanese Utility Model Application Laid-Open No. 55-87170, or in Japanese Utility Model Application Laid-Open No. 60-95183.
As shown in "Overload protection device for hermetic compressor" in Japanese Patent Application Laid-Open Publication No. H10-209, there is a device mounted inside a housing by an elastic body.
【０００３】プロテクタを縛り紐などでコイルに縛り付
けるものにおいては、その取付作業は容易ではなく非常
に手間がかかるという問題があった。それに対して実開
昭６０−９５１８３号の過負荷保護装置は弾性体によっ
て密閉ハウジング内部に取り付けられるため過負荷保護
装置の取付作業は容易になるが、密閉ハウジング内部に
あらかじめ弾性体など過負荷保護装置の取付けの為の部
品を設置しておく必要があり、また密閉ハウジングや電
動機巻線との間に充分な絶縁距離を必要とするため電動
圧縮機の密閉ハウジング内の余分な空間を考慮したり、
密閉ハウジングを余分に大きくする必要がある。[0003] In the case where the protector is tied to the coil with a tying string or the like, there is a problem that the mounting work is not easy and it takes much time. It becomes easier the operation of mounting the overload protector for mounted inside the sealed housing overload protector real HirakiAkira No. 60-95183 by the elastic member to it, in advance such as elastic overload protection within the sealed housing It is necessary to install parts for mounting the device, and to take the extra space in the sealed housing of the electric compressor into consideration because a sufficient insulation distance is required between the sealed housing and the motor winding. Or
The sealed housing needs to be extra large.
【０００４】これに対して例えば特開昭６２−２９６７
３９号公報や特開昭６３−２８２４６の「密閉形電動圧
縮機用プロテクタ」などにおいては、プロテクタにタブ
やリセプタクルの様な接続端子を固着し、このプロテク
タをソケット内に収納、もしくはソケット外側に固定し
て密閉ハウジングのガラス密封端子のピンに前記接続端
子を直接取り付けたものが示されている。On the other hand, for example, Japanese Patent Laid-Open No. 62-2967
In Japanese Patent Publication No. 39 and JP-A-63-28246, for example, a "protector for hermetic electric compressor" has connection terminals such as tabs and receptacles fixed to the protector, and the protector is housed in the socket or outside the socket. The fixed terminal is shown in which the connection terminal is directly attached to the pin of the glass sealed terminal of the sealed housing .
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述の
如くプロテクタに固着された接続端子を直接密閉ハウジ
ングのガラス密封端子に取り付けるものにおいては、プ
ロテクタの取付けが容易になり且つ取付位置が最小限で
済むために電動圧縮機の密閉ハウジング内の余分な空間
を考慮したり、密閉ハウジングを余分に大きくする必要
がなくなるが、電動圧縮機の運転時の振動などによりプ
ロテクタと接続端子との固着部に捩れや曲げなどにより
大きな負担がかかり、従来の方法では必ずしも充分な強
度が得られないという問題があった。[SUMMARY OF THE INVENTION However, directly sealed housings the connection terminal secured to the protector as described above
In the case where the protector is attached to the glass sealed terminal of the compressor, the extra space in the sealed housing of the electric compressor is taken into consideration in order to facilitate the mounting of the protector and minimize the mounting position, or the sealed housing is made extra large. However, there is a problem that the conventional method does not always provide sufficient strength due to torsion or bending of the fixed part between the protector and the connection terminal due to vibration during operation of the electric compressor. there were.
【０００６】そこで本出願人は特願平５−２５９３３１
において、プロテクタと接続端子との固着部を樹脂等の
充填剤によって硬化し、外力が加わらないようにしたプ
ロテクタを提案している。このプロテクタは固着部に対
する外力の影響は排除する事ができるが、熱容量の比較
的大きい充填剤を少なくともプロテクタの熱応動開閉器
の金属容器の一面に接触するように充填する事になるた
め、異常時の温度上昇等に対する追従性が低下し、特に
温度上昇速度が早い電動圧縮機を保護することが難しく
なるという問題があった。また充填剤を充填、硬化させ
る工程を必要とするため、その製造作業が煩雑になり製
造に時間を要するという問題があった。Accordingly, the present applicant has filed Japanese Patent Application No. 5-259331.
Has proposed a protector in which a fixed portion between the protector and the connection terminal is hardened by a filler such as resin to prevent external force from being applied. Although this protector can eliminate the effect of external force on the fixed part, it will fill the filler with a relatively large heat capacity so as to contact at least one side of the metal container of the protector's thermally responsive switch. There is a problem that the ability to follow the temperature rise at the time is reduced, and it is particularly difficult to protect the electric compressor having a high temperature rise speed. In addition, since a step of filling and curing the filler is required, there has been a problem that the manufacturing operation is complicated and time is required for the manufacturing.
【０００７】[0007]
【課題を解決するための手段】そこで本発明の密閉形電
動圧縮機用プロテクタは金属製の密閉容器とこの密閉容
器を貫通して絶縁固定された２本のリード端子ピンを有
した熱応動開閉器と、熱応動開閉器より充分に大きな開
口部を有し収納された熱応動開閉器の密閉容器の大部分
を露出する電気絶縁物製の浅い箱形ホルダーを有し、該
ホルダーには一端が電動機巻線や電源等に接続され他端
が熱応動開閉器に接続される２個の接続端子が保持固定
されており、前記ホルダーの一側面にはガラス密封端子
に向けて壁が形成されており、その反対側の開口部には
熱応動開閉器を収納する凹部と熱応動開閉器のリード端
子ピンと各々の接続端子との固着部を収納する部分と接
続端子を固定する部分が配設されており、接続端子を固
定する部分にはそれぞれの接続端子がホルダーの一端に
受けた力を熱応動開閉器に接続された端部に伝達する事
の無いように固定され、固着部を収納する部分には熱応
動開閉器のリード端子ピンと前記接続端子の一端が収納
されて互いに導電的に固着され、このリセプタクルは前
記ガラス密封端子の導電端子に固定されたタブ端子に直
接挿入接続され、前記ホルダーの凹部に前記熱応動開閉
器が容器の大部分を周囲雰囲気中に暴露するように位置
決めされた上で収納され、該熱応動開閉器のリード端子
ピン又は密閉容器と前記接続端子とを導電的に固着する
ことにより熱応動開閉器のホルダーに対する固定が行わ
れる事を特徴とする。SUMMARY OF THE INVENTION Accordingly, a protector for a hermetic electric compressor according to the present invention is a thermally responsive opening / closing device having a metal hermetic container and two lead terminal pins insulated and fixed through the hermetic container. And a shallow box-shaped holder made of an electrically insulating material having an opening which is sufficiently larger than that of the thermally responsive switch and exposing most of the enclosed container of the accommodated thermal responsive switch. Are connected and fixed to two terminals connected to a motor winding and a power supply, and the other end is connected to a thermally responsive switch. A glass sealed terminal is provided on one side of the holder.
A wall is formed toward the opening, and a concave portion for accommodating the thermally responsive switch, a portion for accommodating a fixing portion between the lead terminal pin of the thermally responsive switch and each connection terminal, and a connection terminal are formed on the opposite opening. The part that fixes the connection terminals is provided so that each connection terminal does not transmit the force received at one end of the holder to the end connected to the thermally responsive switch. A lead terminal pin of the thermally responsive switch and one end of the connection terminal are housed in a portion where the fixed portion is housed, and are electrically conductively fixed to each other, and the receptacle is a tab fixed to the conductive terminal of the glass sealed terminal. The thermoresponsive switch is directly inserted into and connected to a terminal, and is housed in the recess of the holder after the thermoresponsive switch is positioned so as to expose most of the container to the surrounding atmosphere, and the lead terminal pin or the hermetic seal of the thermoresponsive switch is accommodated. container Characterized in that fixed against the holder of the thermally responsive switch is performed by fixing the said connection terminal conductively.
【０００８】また他の特徴はホルダーの凹部に熱応動開
閉器の密閉容器部分を収納すると共にその密閉容器が当
接する事により収納位置が決められる当接部を有してい
ることにある。Another feature resides in that the closed container portion of the thermally responsive switch is housed in the recess of the holder, and that the housing has a contact portion whose storage position is determined by contacting the closed container.
【０００９】さらに他の特徴は密閉形電動圧縮機のガラ
ス密封端子の導電端子に固定されたタブ端子に直接接続
される接続端子であるリセプタクルの導電端子に対する
撓みや捩れ等の動きを規制し変形や破損を防ぐためにリ
セプタクルの周囲を囲うようにした端子保持部をホルダ
ーに設け、この端子保持部はホルダーを貫通して設けら
れており前記接続端子の一方であるリセプタクルの先端
を収納していることにある。Still another feature is that the receptacle is a connection terminal which is directly connected to the tab terminal fixed to the conductive terminal of the glass sealed terminal of the hermetic electric compressor, and restricts the deformation such as bending or twisting of the conductive terminal with respect to the conductive terminal. A terminal holding portion surrounding the periphery of the receptacle is provided on the holder to prevent the terminal from being damaged or damaged.The terminal holding portion is provided through the holder and houses the tip of the receptacle which is one of the connection terminals. It is in.
【００１０】[0010]
【実施例】以下、図面を参照しながら実施例について説
明する。図１は本発明の密閉形電動圧縮機用プロテクタ
（以下プロテクタと言う）が取付けられた所謂高圧ハウ
ジングの密閉形電動圧縮機の縦断面図であり、図２はこ
の密閉形電動圧縮機のＡ−Ａ断面矢視図である。密閉形
電動圧縮機１は蓋２と下部ハウジング３からなる密閉ハ
ウジングを構成しており、この密閉ハウジング内には周
知の構造の電動機４と圧縮機５が収納固定されている。
この圧縮機５に図示しない熱交換器から送られてきた冷
媒を導入するための吸入管６が密閉ハウジングを貫通し
て接続されており、圧縮機５で圧縮された冷媒は密閉ハ
ウジング内に放出され電動機の周囲を流れ吐出管７から
再び熱交換器に送られる。密閉ハウジングの一部、実施
例では蓋２に貫通孔が設けられておりこの貫通孔には密
閉ハウジング内部の電動機４を外部の電源に接続するた
めのガラス密封端子８が溶接などにより気密に固定され
ている。また密閉ハウジング内には電動機４及び圧縮機
５のための潤滑油９が封入されている。Embodiments will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a hermetic electric compressor having a so-called high-pressure housing to which a protector (hereinafter referred to as a protector) for an hermetic electric compressor of the present invention is attached. FIG. FIG. Sealed electric compressor 1 comprises a lid 2 and a lower housing 3 closed Ha
Constitute a Ujingu, compressor 5 is housed fixed to the motor 4 of known construction is within the sealed housing.
The suction pipe 6 for transmitted from the compressor 5 the heat exchanger (not shown) to introduce a refrigerant have are connected through the sealed housing, the refrigerant compressed by the compressor 5 is sealed Ha
It is discharged into the housing , flows around the motor, and is sent again from the discharge pipe 7 to the heat exchanger. A through hole is provided in a part of the sealed housing , in the embodiment, the lid 2, and a glass sealed terminal 8 for connecting the electric motor 4 inside the sealed housing to an external power supply is hermetically fixed by welding or the like in this through hole. Have been. A lubricating oil 9 for the electric motor 4 and the compressor 5 is sealed in the sealed housing .
【００１１】実施例ではガラス密封端子８は３本の導電
端子８Ａ，８Ｂ，８Ｃを有し、それぞれの導電端子はガ
ラスの如き電気絶縁材料で気密に貫通固定されている。
また各々の導電端子には密閉ハウジング内側に接続用の
タブ端子が取り付けられており、そのうちの二本，８
Ｂ，８Ｃには各々に電動機の巻線からの複数のリード線
１０のうちの一本ずつが接続され、残る８Ａにはプロテ
クタ１１を介して電動圧縮機からのリード線が接続され
ている。In the embodiment, the glass sealed terminal 8 has three conductive terminals 8A, 8B and 8C, and each of the conductive terminals is air-tightly fixed by an electrically insulating material such as glass.
Each conductive terminal is provided with a connecting tab terminal inside the sealed housing.
Each of B and 8C is connected to one of a plurality of leads 10 from the windings of the electric motor, and the remaining 8A is connected to a lead from an electric compressor via a protector 11.
【００１２】このプロテクタ１１について図３乃至図８
を参照して説明する。図３はこのプロテクタ１１の平面
図であり、図４はそのＢ−Ｂ断面図、図５はＣ−Ｃ断面
図である。プロテクタ１１は例えば図６（Ａ）に示す如
き周知の構造の金属製の気密な容器を有した熱応動開閉
器１２を、図６（Ｃ）に示す如き電気絶縁性のホルダー
１３に収納固定している。この熱応動開閉器１２はバイ
メタルの如き熱応動素子を使用した周知の構造のもので
あり、その構造については説明を省略するが例えば特開
平２−２２７９２８号公報や特開平５−３６３３５号公
報に示されている。The protector 11 is shown in FIGS.
This will be described with reference to FIG. FIG. 3 is a plan view of the protector 11, FIG. 4 is a sectional view taken along line BB, and FIG. 5 is a sectional view taken along line CC. The protector 11 accommodates and fixes a thermally responsive switch 12 having an airtight metal container having a well-known structure as shown in FIG. 6A, for example, in an electrically insulating holder 13 as shown in FIG. 6C. ing. The thermally responsive switch 12 has a well-known structure using a thermally responsive element such as a bimetal. The description of the structure is omitted, but for example, Japanese Patent Application Laid-Open Nos. 2-22728 and 5-36335 disclose the structure. It is shown.
【００１３】熱応動開閉器１２にはその気密な容器を貫
通してリード端子ピン１２Ａ，１２Ｂがガラスやセラミ
ックスの如き電気絶縁性の封止材料１２Ｃにより気密に
固定されている。各々のリード端子ピンには前述のガラ
ス密封端子８や電動機からのリード線１０との接続のた
めの接続端子１４，１５が溶接などにより導電的に接続
固定されている。本実施例においては接続端子１５はガ
ラス密封端子の導電端子８Ａに接続され、接続端子１４
は前述の如く電動機からのリード線１０のうちの一本に
接続される。[0013] thermally responsive switch is the 12 lead terminal pins 12A through the airtight container, 12B is fixed to the hermetically by a sealing material 12C-described electrically insulating glass or ceramics. Connection terminals 14 and 15 for connection with the above-mentioned glass sealed terminal 8 and a lead wire 10 from an electric motor are conductively connected and fixed to each lead terminal pin by welding or the like. In this embodiment, the connection terminal 15 is connected to the conductive terminal 8A of the glass sealed terminal,
Is connected to one of the leads 10 from the motor as described above.
【００１４】ホルダー１３は図８（Ａ）に側面図を、ま
た図８（Ｂ）に正面図を示す様に概ね一方の側壁を欠い
た箱形を呈しており、予め一方の接続端子１４が接続端
子固定部１３Ａにおいてインサート成形によって固定さ
れ、その両端１４Ａ及び１４Ｂは電気的に接続するため
に露出されている。また他方の接続端子を固定する接続
端子保持部１３Ｂが設けられており、図６（Ｂ）に示す
如き形状の接続端子１５が挿入固定される。而して、接
続端子保持部１３Ｂの壁１３Ｃの図４に於ける上部が接
続端子１５の曲げ部１５Ａの幅よりも若干厚くされてお
り、接続端子１５を所定の位置まで挿入する事により端
子の肩部１５Ｂが段部１３Ｄに弾性的に係止されるため
接続端子１５全体がホルダー１３に保持される。なお１
３Ｅは接続端子１５の後述する溶接部１５Ｃ側端部の位
置決め用に設けられた棚状部である。As shown in a side view of FIG. 8A and a front view of FIG. 8B, the holder 13 has a substantially box-like shape having one side wall. The connection terminal fixing portion 13A is fixed by insert molding, and both ends 14A and 14B are exposed for electrical connection. A connection terminal holding portion 13B for fixing the other connection terminal is provided, and a connection terminal 15 having a shape as shown in FIG. 6B is inserted and fixed. The upper portion of the wall 13C of the connection terminal holding portion 13B in FIG. 4 is slightly thicker than the width of the bent portion 15A of the connection terminal 15, and the terminal is inserted by inserting the connection terminal 15 to a predetermined position. The shoulder 15B is elastically locked to the step 13D, so that the entire connection terminal 15 is held by the holder 13. 1
Reference numeral 3E denotes a shelf-shaped portion provided for positioning an end of the connection terminal 15 on the side of a welded portion 15C described later.
【００１５】図３及び図５に示す如く、接続端子１４及
び１５のそれぞれのホルダー１３内側の端部には熱応動
開閉器１２のリード端子ピン１２Ａ，１２Ｂを溶接によ
り固着する溶接部１４Ａ及び１５Ｃが設けられている。
ホルダー１３の前記各溶接部に対応する位置にはそれぞ
れ溶接用の電極を挿入するための貫通孔１３Ｆが穿たれ
ている。As shown in FIG. 3 and FIG. 5, welding portions 14A and 15C for fixing the lead terminal pins 12A and 12B of the thermoresponsive switch 12 to the ends of the connection terminals 14 and 15 inside the holder 13 by welding. Is provided.
A through-hole 13F for inserting a welding electrode is formed in a position of the holder 13 corresponding to each of the welding portions.
【００１６】熱応動開閉器１２はホルダー１３の図３、
図４等に示す如く収納部１３Ｇに収納され、リブ１３Ｈ
及び当接部１３Ｊにより位置決めされた後、リード端子
ピン１２Ａ，１２Ｂを予めホルダー１３に固定された接
続端子１４及び１５の溶接部１４Ａ及び１５Ｃに溶接さ
れる事によりホルダー１３に固定される。この溶接時に
は溶接用電極の一方は図５に示す断面図の上側からリー
ド端子ピン１２Ａ若しくは１２Ｂに当接され、また他方
の電極は図５下方から貫通孔１３Ｆを挿通して接続端子
の溶接部１４Ａ若しくは１５Ｃの下面に当接されたう
え、所定の圧力をかけて電気抵抗溶接される。なお本実
施例においては熱応動開閉器１２のリード端子ピンと金
属製容器との間の絶縁耐圧を高めるために接着剤や樹脂
の様な絶縁部材１６を塗布したり、ペレット状の絶縁部
材１６を溶融硬化させる事によりリード端子ピンと金属
製容器との絶縁距離を長くしているが、絶縁耐圧の性能
が充分である場合にはこれを省いてもよい。The thermally responsive switch 12 is shown in FIG.
As shown in FIG.
After being positioned by the contact portion 13J, the lead terminal pins 12A and 12B are fixed to the holder 13 by being welded to welding portions 14A and 15C of the connection terminals 14 and 15 fixed to the holder 13 in advance. During this welding, one of the welding electrodes is brought into contact with the lead terminal pin 12A or 12B from the upper side in the cross-sectional view shown in FIG. 5, and the other electrode is inserted through the through hole 13F from the lower side in FIG. After being brought into contact with the lower surface of 14A or 15C, electric resistance welding is performed by applying a predetermined pressure. In this embodiment, in order to increase the dielectric strength between the lead terminal pins of the thermally responsive switch 12 and the metal container , an insulating member 16 such as an adhesive or a resin is applied, or a pellet-shaped insulating member 16 is used. The insulation distance between the lead terminal pin and the metal container is increased by melting and hardening, but this may be omitted if the withstand voltage performance is sufficient.
【００１７】このプロテクタ１１の密閉形電動圧縮機へ
の取り付けについて説明すると、図１及び図２に示す電
動圧縮機１のガラス密封端子８の導電端子８Ａ，８Ｂ，
８Ｃには密閉ハウジング内側に接続用のタブ端子が取り
付けられている。この内の二本，８Ｂ，８Ｃには各々電
動機の巻線からの複数のリード線１０のうちの一本が、
その先端に取付けられたリセプタクルをタブ端子に挿入
する事により接続される。また残る導電端子８Ａにはプ
ロテクタ１１の一方の接続端子１５を挿入する事により
プロテクタ１１のガラス密封端子８への接続及び固定が
完了する。またプロテクタ１１の他方の接続端子１４に
は電動機の巻線からのリード線１０のうちの一本がその
先端に取付けられたリセプタクルによって接続固定され
る。このように取付作業は端子の挿入作業のみで行う事
ができるため本発明のプロテクタ１１の取り付けは非常
に容易である。The mounting of the protector 11 on the hermetic electric compressor will be described. The conductive terminals 8A, 8B, 8A, 8B of the glass sealed terminal 8 of the electric compressor 1 shown in FIGS.
8C is provided with a tab terminal for connection inside the sealed housing . Two of these, 8B and 8C, each have one of a plurality of leads 10 from the windings of the motor,
The connection is made by inserting the receptacle attached to the tip into the tab terminal. Inserting one connection terminal 15 of protector 11 into remaining conductive terminal 8A completes the connection and fixing of protector 11 to glass sealed terminal 8. One of the lead wires 10 from the winding of the electric motor is connected and fixed to the other connection terminal 14 of the protector 11 by a receptacle attached to the tip thereof. As described above, since the mounting operation can be performed only by the terminal inserting operation, the mounting of the protector 11 of the present invention is very easy.
【００１８】電動圧縮機が運転されるとその振動等によ
りリード線やガラス密封端子から接続端子１４及び１５
を通じてプロテクタ１１に捩りや曲げ等の力が加わる
が、接続端子１４の中間部がホルダー１３にインサート
成形により固定されており、また接続端子１５は曲げ部
１５Ａをホルダー１３の壁部１３Ｃに弾性的に係止され
ている。そのため上記の捩りや曲げ等の力をホルダー全
体で受けることになり接続端子と熱応動開閉器の固着部
である溶接部に力が集中することはなく固着部の変形や
破損を防ぐことができる。さらに接続端子１５のガラス
密封端子との接続部を接続端子保持部１３Ｂで保持され
ているため撓みや捩りの動きが規制され変形や破損を防
ぐことができる。When the electric compressor is operated, the connection terminals 14 and 15 are removed from the lead wires or the glass sealed terminals by the vibration or the like.
A force such as torsion or bending is applied to the protector 11 through the connector, but the intermediate portion of the connection terminal 14 is fixed to the holder 13 by insert molding, and the connection terminal 15 elastically attaches the bent portion 15A to the wall 13C of the holder 13. It is locked to. Therefore, the above-mentioned force such as torsion or bending is received by the entire holder, so that the force does not concentrate on the welded portion, which is the fixed portion between the connection terminal and the thermally responsive switch, and deformation and breakage of the fixed portion can be prevented. . Further, since the connection portion of the connection terminal 15 with the glass sealed terminal is held by the connection terminal holding portion 13B, the bending and torsional movements are restricted, so that deformation and breakage can be prevented.
【００１９】また熱応動開閉器１２の容器のドーム状部
分１２Ｄが周囲に対して開放されているため密閉形電動
圧縮機中の冷媒が直接熱応動開閉器の周囲を流れプロテ
クタ１１は冷媒の温度変化にすばやく追従する事ができ
る。ここで熱応動開閉器１２のドーム状部分１２Ｄは絶
縁されていないが、密閉形電動圧縮機１の蓋２及び下部
ハウジング３とは充分な距離があるためその絶縁が問題
になる事はない。Further, since the dome-shaped portion 12D of the container of the thermally responsive switch 12 is open to the surroundings, the refrigerant in the hermetic electric compressor flows directly around the thermally responsive switch and the protector 11 controls the temperature of the refrigerant. You can quickly follow changes. Here, the dome-shaped portion 12D of the thermoresponsive switch 12 is not insulated, but the lid 2 and the lower portion of the hermetic electric compressor 1 are not insulated.
Since there is a sufficient distance from the housing 3, its insulation does not matter.
【００２０】また実施例では熱応動開閉器として２端子
のものを例に説明をしたが、熱応動開閉器の形式は金属
製の密閉容器とこの密閉容器を貫通して絶縁固定された
１本以上のリード端子ピンを有したものであれば実施例
の形式に限るものではなく、例えば接続端子の一方を金
属容器に導電的に固着する事により熱応動開閉器をホル
ダーに固定するものであってもよい。In the embodiment, the two-terminal thermal responsive switch has been described as an example. However, the type of the thermal responsive switch is a metal hermetic container and a one-piece which is insulated and fixed through the hermetic container. The present invention is not limited to the embodiment as long as it has the above-mentioned lead terminal pins. For example, the thermally responsive switch is fixed to a holder by conductively fixing one of the connection terminals to a metal container. You may.
【００２１】[0021]
【発明の効果】本発明のプロテクタにおいては接続端子
をインサート成形したり接続端子の弾性を利用してホル
ダーに固定したり接続端子の撓みや捩れを規制する保持
部を設ける事により、従来電動圧縮機の運転時の振動な
どにより熱応動開閉器と接続端子との固着部にかかって
いた力は大部分がホルダーにより受け止められるため、
固着部の強度は従来と同様の溶接等により充分得る事が
できる。According to the protector of the present invention, the connection terminal is insert-molded, the connection terminal is fixed to the holder by utilizing the elasticity of the connection terminal, and the holding portion for restricting the bending and torsion of the connection terminal is provided. Since most of the force applied to the fixed part between the thermally responsive switch and the connection terminal due to vibration during operation of the machine is received by the holder,
The strength of the fixed portion can be sufficiently obtained by welding or the like as in the past.
【００２２】また熱応動開閉器と接続端子との固着部に
樹脂等の充填剤を充填硬化したものと比較して全体の熱
容量が少ないため電流による発熱や周囲温度への追従性
が良くなり、また熱応動開閉器の容器の周囲が開放され
ているため周囲の冷媒との熱交換関係が良好になり、異
常時には迅速に密閉形電動圧縮機の保護をする事ができ
る。さらに充填剤の充填硬化の作業を省略する事ができ
るため、製造が容易になり作業時間が短縮される。Further, since the entire heat capacity is smaller than that obtained by filling and hardening a filler such as a resin in the fixing portion between the thermally responsive switch and the connection terminal, heat generation due to electric current and followability to the ambient temperature are improved. In addition, since the periphery of the container of the thermally responsive switch is open, the heat exchange relationship with the surrounding refrigerant is improved, and in the event of an abnormality, the hermetic electric compressor can be quickly protected. Further, since the operation of filling and curing the filler can be omitted, the production becomes easy and the operation time is shortened.
【図１】本発明のプロテクタを使用した密閉形電動圧縮
機の一実施例。FIG. 1 shows an embodiment of a hermetic electric compressor using a protector of the present invention.
【図２】図１の密閉形電動圧縮機のＡ−Ａ断面矢視図。FIG. 2 is a sectional view of the hermetic electric compressor shown in FIG.
【図３】本発明のプロテクタの一実施例の平面図。FIG. 3 is a plan view of one embodiment of the protector of the present invention.
【図４】図３のプロテクタのＢ−Ｂ断面矢視図。FIG. 4 is a sectional view of the protector of FIG.
【図５】図３のプロテクタのＣ−Ｃ断面矢視図。FIG. 5 is a sectional view of the protector in FIG.
【図６】図３の実施例に使用されるものであり、（Ａ）
は熱応動開閉器、（Ｂ）は一方の接続端子、（Ｃ）はホ
ルダーの斜視図。FIG. 6 (A) used in the embodiment of FIG.
FIG. 3 is a perspective view of a thermoresponsive switch, (B) is one connection terminal, and (C) is a holder.
【図７】図３のプロテクタの斜視図。FIG. 7 is a perspective view of the protector of FIG. 3;
【図８】図３の実施例に使用されるホルダーであり、
（Ａ）は側面図、（Ｂ）は正面図。8 is a holder used in the embodiment of FIG. 3,
(A) is a side view, (B) is a front view.
１：密閉形電動圧縮機 ８：ガラス密封端子 １１：プロテクタ １２：熱応動開閉器 １２Ａ，１２Ｂ：リード端子ピン １３：ホルダー １３Ａ：接続端子固定部 １３Ｂ：接続端子保持部 １４，１５：接続端子 1: Hermetic electric compressor 8: Glass sealed terminal 11: Protector 12: Thermally responsive switch 12A, 12B: Lead terminal pin 13: Holder 13A: Connection terminal fixing portion 13B: Connection terminal holding portion 14, 15: Connection terminal
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H02K 11/00 F04B 39/00 106──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) H02K 11/00 F04B 39/00 106
Claims (3)
を冷媒と共に気密に収容してなる密閉形電動圧縮機のガ
ラス密封端子の導電端子に接続されるプロテクタであっ
て、 金属製の密閉容器とこの密閉容器を貫通して絶縁固定さ
れた２本のリード端子ピンを有した熱応動開閉器と、 熱応動開閉器より充分に大きな開口部を有し収納された
熱応動開閉器の密閉容器の大部分を露出する電気絶縁物
製の浅い箱形ホルダーを有し、 該ホルダーには一端が電動機巻線や電源等に接続され他
端が熱応動開閉器に接続される２個の接続端子が保持固
定されており、前記ホルダーの一側面にはガラス密封端子に向けて壁が
形成されており、 その反対側の開口部には熱応動開閉器を収納する凹部と
熱応動開閉器のリード端子ピンと各々の接続端子との固
着部を収納する部分と接続端子を固定する部分が配設さ
れており、 接続端子を固定する部分にはそれぞれの接続端子がホル
ダーの一端に受けた力を熱応動開閉器に接続された端部
に伝達する事の無いように固定され、 固着部を収納する部分には熱応動開閉器のリード端子ピ
ンと前記接続端子の一端が収納されて互いに導電的に固
着され、 このリセプタクルは前記ガラス密封端子の導電端子に固
定されたタブ端子に直接挿入接続され、 前記ホルダーの凹部に前記熱応動開閉器が容器の大部分
を周囲雰囲気中に暴露するように位置決めされた上で収
納され、 該熱応動開閉器のリード端子ピン又は密閉容器と前記接
続端子とを導電的に固着することにより熱応動開閉器の
ホルダーに対する固定が行われる事を特徴とする密閉形
電動圧縮機用プロテクタ。1. A protector connected to a conductive terminal of a glass sealed terminal of a hermetic electric compressor in which a motor and a compressor are hermetically housed in a metal housing together with a refrigerant in a metal housing . A thermally responsive switch having two lead terminal pins that are insulated and fixed through the hermetic container; and a hermetically closed container of the thermally responsive switch housed with an opening that is sufficiently larger than the thermally responsive switch. It has a shallow box-shaped holder made of an electrically insulating material that exposes the most part. The holder has two connection terminals, one end of which is connected to a motor winding or a power supply and the other end of which is connected to a thermally responsive switch. It is held and fixed, and a wall is formed on one side of the holder toward the glass sealed terminal.
In the opening on the opposite side, a concave portion for accommodating the thermally responsive switch, a portion for accommodating a fixing portion between the lead terminal pin of the thermally responsive switch and each connection terminal, and a portion for fixing the connection terminal are provided. The connection terminals are fixed to the part where the connection terminals are fixed so that each connection terminal does not transmit the force received at one end of the holder to the end connected to the thermally responsive switch. The lead terminal pin of the thermally responsive switch and one end of the connection terminal are housed in a portion for housing the connector, and are electrically conductively fixed to each other. This receptacle is directly inserted and connected to a tab terminal fixed to the conductive terminal of the glass sealed terminal. The thermally responsive switch is housed in the recess of the holder after being positioned so as to expose most of the container to the surrounding atmosphere, and is connected to the lead terminal pin or the sealed container of the thermally responsive switch. Sealed electric compressor protector, characterized in that fixed against the holder of the thermally responsive switch is performed by fixing the terminal conductively.
容器部分を収納すると共にその密閉容器が当接する事に
より収納位置が決められる当接部を有している請求項１
に記載の密閉形電動圧縮機用プロテクタ。2. A holder for accommodating a sealed container portion of a thermally responsive switch in a concave portion of the holder and having a contact portion whose storage position is determined by contacting the sealed container.
2. The protector for a hermetic electric compressor according to item 1.
電端子に固定されたタブ端子に直接接続される接続端子
であるリセプタクルの導電端子に対する撓みや捩れ等の
動きを規制し変形や破損を防ぐためにリセプタクルの周
囲を囲うようにした端子保持部をホルダーに設け、この
端子保持部はホルダーを貫通して設けられており前記接
続端子の一方であるリセプタクルの先端を収納している
ことを特徴とする請求項１または請求項２に記載の密閉
形電動圧縮機用プロテクタ。3. Restriction of deformation or damage to the conductive terminal of the receptacle, which is a connection terminal directly connected to the tab terminal fixed to the conductive terminal of the glass sealed terminal of the hermetic electric compressor, to prevent deformation or breakage. A terminal holding portion surrounding the periphery of the receptacle is provided on the holder to prevent this, and the terminal holding portion is provided penetrating the holder and houses the tip of the receptacle which is one of the connection terminals. The protector for a hermetic electric compressor according to claim 1 or 2, wherein
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6052917A JP2769600B2 (en) | 1994-02-25 | 1994-02-25 | Protector for hermetic electric compressor |
| US08/298,431 US5515217A (en) | 1993-09-22 | 1994-08-30 | Thermal protector for hermetic electrically-driven compressors |
| CN94116451A CN1064436C (en) | 1993-09-22 | 1994-09-21 | Thermal protector for hermetic electrically-driven compressors |
| KR1019940024168A KR0134848B1 (en) | 1993-09-22 | 1994-09-22 | Protector for hermetic electrically driven compressors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6052917A JP2769600B2 (en) | 1994-02-25 | 1994-02-25 | Protector for hermetic electric compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07241061A JPH07241061A (en) | 1995-09-12 |
| JP2769600B2 true JP2769600B2 (en) | 1998-06-25 |
Family
ID=12928188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6052917A Expired - Lifetime JP2769600B2 (en) | 1993-09-22 | 1994-02-25 | Protector for hermetic electric compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2769600B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536769A (en) * | 2010-12-13 | 2012-07-04 | 上海珂纳电气机械有限公司 | Built-in type heat protector fixing device and fixing structure |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3600781B2 (en) | 2000-06-06 | 2004-12-15 | 株式会社日立製作所 | Protection device for hermetic electric compressor, hermetic electric compressor and cooling system using the same |
| JP4522132B2 (en) * | 2004-04-02 | 2010-08-11 | 株式会社生方製作所 | Protection device for electric compressor |
| KR100643020B1 (en) * | 2004-10-18 | 2006-11-10 | 센서스앤드컨트롤스코리아 주식회사 | Overload protector for compressor |
| JP4799180B2 (en) | 2006-01-05 | 2011-10-26 | サンデン株式会社 | Electric compressor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5885280A (en) * | 1981-11-17 | 1983-05-21 | Matsushita Electric Ind Co Ltd | Thermal battery |
| JPH0767255B2 (en) * | 1986-06-16 | 1995-07-19 | 生方 眞哉 | Hermetic protector for electric compressor |
| JP2568293B2 (en) * | 1990-03-03 | 1996-12-25 | 株式会社日立製作所 | Motor with temperature protection switch |
-
1994
- 1994-02-25 JP JP6052917A patent/JP2769600B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536769A (en) * | 2010-12-13 | 2012-07-04 | 上海珂纳电气机械有限公司 | Built-in type heat protector fixing device and fixing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07241061A (en) | 1995-09-12 |
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