JPH083175Y2 - Electric motor cooling device - Google Patents
Electric motor cooling deviceInfo
- Publication number
- JPH083175Y2 JPH083175Y2 JP1990051053U JP5105390U JPH083175Y2 JP H083175 Y2 JPH083175 Y2 JP H083175Y2 JP 1990051053 U JP1990051053 U JP 1990051053U JP 5105390 U JP5105390 U JP 5105390U JP H083175 Y2 JPH083175 Y2 JP H083175Y2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- expansion valve
- refrigerant
- stator
- liquid
- 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
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は冷媒圧縮機用モータの冷却装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cooling device for a motor for a refrigerant compressor.
第２図は、例えば実公昭52-32884号公報に示された従
来の電動機の冷却装置であり、図において、（１）は圧
縮機、（２）はモータ、（３）は膨張弁、（４）は感温
筒、（５）は凝縮液管、（６）は凝縮液が膨張しながら
固定子を冷却するモータ（２）のフレームに設けられた
螺旋状溝、（７）は固定子、（８）はこの固定子（７）
の巻線、（９）は回転子、（10）は圧縮機と連結したモ
ータ（２）の駆動軸、（11）は冷却を終えた凝縮液（こ
の部位ではガス又は少量の液ミスト）の戻り通路、（1
2）は凝縮液が膨張後、フラッシュガスと液に分離され
て溜った冷媒液、（13）はエアギャップである。FIG. 2 shows a conventional cooling device for an electric motor disclosed in, for example, Japanese Utility Model Publication No. 52-32884, in which (1) is a compressor, (2) is a motor, and (3) is an expansion valve. 4) is a temperature sensitive cylinder, (5) is a condensate pipe, (6) is a spiral groove provided in the frame of the motor (2) for cooling the stator while the condensate expands, and (7) is a stator. , (8) is this stator (7)
Winding, (9) a rotor, (10) a drive shaft of a motor (2) connected to a compressor, and (11) a condensed liquid (gas or a small amount of liquid mist at this portion). Return corridor, (1
2) is a refrigerant liquid that is collected after the condensate is expanded and separated into flash gas and liquid, and (13) is an air gap.
次に動作について説明する。冷媒回路で凝縮液化した
冷媒液は液管（５）から供給され膨張弁（３）で減圧さ
れ、固定子外周を旋回する溝（６）で気化しながら固定
子（７）を冷却する。膨張弁（３）は、感温筒（４）取
付部のスーパヒートで流量を調節する。溝（６）を出た
冷媒液は巻線（８）を冷却し、エアギャップ（13）を通
って固定子及び回転子を冷却し、更に軸（10）側の巻線
（８）を冷却した後、戻り通路（11）を通って圧縮機
（１）に吸込まれる。Next, the operation will be described. The refrigerant liquid condensed and liquefied in the refrigerant circuit is supplied from the liquid pipe (5), decompressed by the expansion valve (3), and vaporizes in the groove (6) swirling the outer periphery of the stator to cool the stator (7). The expansion valve (3) adjusts the flow rate by superheat of the mounting portion of the temperature sensitive cylinder (4). The refrigerant liquid flowing out of the groove (6) cools the winding (8), cools the stator and the rotor through the air gap (13), and further cools the winding (8) on the shaft (10) side. After that, it is sucked into the compressor (1) through the return passage (11).
従来の装置は以上のように構成されているので、感温
筒（４）部位では概ね気化するものの、溝（６）を出た
状態では、まだ回転子及び巻線（８）を冷却する能力を
持っている必要があるので、液分を十分持っている。こ
の液は第２図に示すように溜り、巻線（８）は冷媒液に
浸たされる。化学的に活性な冷媒では、巻線（８）が冷
媒液に浸されることにより、巻線の絶縁が短期間に劣化
する問題点があった。Since the conventional device is configured as described above, it is substantially vaporized at the temperature sensing tube (4) portion, but is still capable of cooling the rotor and the winding (8) in the state of exiting the groove (6). You have to have enough liquid. This liquid accumulates as shown in FIG. 2, and the winding (8) is immersed in the refrigerant liquid. In the case of the chemically active refrigerant, the winding (8) is immersed in the refrigerant liquid, so that the insulation of the winding is deteriorated in a short period of time.
この考案は上記のような問題点を解消するためになさ
れたもので、取り分けＲ−22のように化学的に活性な冷
媒を使用する冷媒圧縮機のモータ冷却方式であって、巻
線の絶縁が活性な冷媒液に浸されることによって起こる
巻線の絶縁劣化を防止することが目的とした冷媒圧縮機
のモータの冷却装置を提供するものである。The present invention has been made to solve the above-mentioned problems, and in particular, it is a motor cooling system for a refrigerant compressor that uses a chemically active refrigerant such as R-22. The invention provides a cooling device for a motor of a refrigerant compressor, which is intended to prevent insulation deterioration of a winding caused by being immersed in an active refrigerant liquid.
この考案に係る電動機の冷却装置は、液溜りを防止す
るために第一膨張弁の感温筒を螺旋状溝の出口に設けて
流量を制御すると共に、回転子を冷却するために固定子
を貫通して回転子外径に至る第二の冷却通路を設け、第
二の膨張弁により流量を制御するようにしたものであ
る。A cooling device for an electric motor according to the present invention is provided with a temperature-sensing cylinder of a first expansion valve at an outlet of a spiral groove to control a flow rate in order to prevent liquid pooling, and a stator for cooling a rotor. A second cooling passage that penetrates to reach the outer diameter of the rotor is provided, and the flow rate is controlled by the second expansion valve.
この考案における第一膨張弁（３）は、第１図に示す
位置に配置してあるので、この部位に残溜液が発生しな
いように流量を制御する。第二膨張弁（14）はエアギャ
ップ（13）部の冷却と軸側の巻線（８）を冷却可能な流
量を流すように動作する。Since the first expansion valve (3) in this invention is arranged at the position shown in FIG. 1, the flow rate is controlled so that the residual liquid is not generated at this portion. The second expansion valve (14) operates so as to cool the air gap (13) and to flow the axial winding (8) at a flow rate capable of cooling.
以下、この考案の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図において、（３）は第一の膨張弁、（４）は第一
の膨張弁（３）の感温筒、（14）は固定子（７）の溝
（６）以外の固定子外周に連通する第二の膨張弁、（1
5）はこの第二の膨張弁（14）の感温筒であって、上記
戻り通路（11）の入口部のモータ（２）の外枠に取付け
られている。（16）は上記第二の膨張弁（14）から固定
子を貫通して成る冷却液通路である。In FIG. 1, (3) is a first expansion valve, (4) is a temperature sensing cylinder of the first expansion valve (3), and (14) is a stator other than the groove (6) of the stator (7). A second expansion valve communicating with the outer circumference, (1
Reference numeral 5) is a temperature sensitive cylinder of the second expansion valve (14), which is attached to the outer frame of the motor (2) at the inlet of the return passage (11). Reference numeral (16) is a cooling liquid passage formed by penetrating the stator from the second expansion valve (14).
なお、その他の構成については従来と同様につき説明
を省略する。The other configurations are the same as the conventional ones and will not be described.
第一の膨張弁（３）は螺旋状溝（６）の出口の空間の
スーパヒートが設定値になるように開閉して冷却液の流
量を制御する。すなわち、固定子外周と反軸側の巻線
（８）を冷却するのに十分な液を流すので反軸側の巻線
部に液が溜り、巻線（８）が冷媒液に浸されることはな
い。第一の膨張弁（３）を通った冷媒液は全て気化して
エアギャップ（13）を通って戻り通路（11）を通って圧
縮機（１）に吸引される冷媒液通路（16）はエアギャッ
プ（13）部位の熱を吸収するものであって、冷媒液の量
は余剰にならないように第二の膨張弁（14）を設けて制
御している。ここで、感温筒を持つ温度式膨張弁を使用
しているのは、冷媒回路の凝縮液を余分に消費すること
が冷媒回路の損失になること、圧縮機（１）が戻り通路
（11）を経由して吸引するモータを冷却して気化した冷
媒ガスが液分を残して湿める又は、その冷媒ガスが圧縮
機の吸引する冷媒回路の吸込ガスより大きく過熱するこ
とが圧縮機に不都合であるためである。The first expansion valve (3) is opened and closed so that the superheat in the space at the outlet of the spiral groove (6) reaches a set value to control the flow rate of the cooling liquid. That is, since a sufficient amount of liquid is supplied to cool the outer circumference of the stator and the non-axial winding (8), the liquid accumulates in the non-axial winding portion and the winding (8) is immersed in the refrigerant liquid. There is no such thing. The refrigerant liquid passage (16), which has been completely vaporized by the first expansion valve (3), passes through the air gap (13), passes through the return passage (11), and is sucked into the compressor (1), The second expansion valve (14) is provided and controlled so as to absorb the heat of the air gap (13) and prevent the amount of the refrigerant liquid from becoming excessive. Here, the temperature type expansion valve having a temperature sensitive cylinder is used because excessive consumption of the condensate in the refrigerant circuit causes a loss in the refrigerant circuit, and the compressor (1) uses a return passage (11 ), The refrigerant gas vaporized by cooling the motor is moistened by leaving a liquid, or the refrigerant gas overheats more than the suction gas of the refrigerant circuit drawn by the compressor. This is because it is inconvenient.
なお、上記実施例では、固定子外周に螺旋溝の有る例
を示したが直接巻線に液冷媒を噴霧する方式であって
も、また冷却後の冷媒の戻し先を圧縮機に直接戻す例を
示したが、蒸発器等の冷媒回路蒸発圧力側を経由して圧
縮機が最終的に吸込んでも良いことは言うまでもない。
また第二の膨張弁（14）は圧縮機が許容すれば固定絞り
等の膨張手段であっても良い。In the above embodiment, an example in which there is a spiral groove on the outer circumference of the stator is shown, but even if it is a method of directly spraying the liquid refrigerant on the winding, an example in which the return destination of the cooled refrigerant is returned directly to the compressor However, it goes without saying that the compressor may finally take in air via the refrigerant circuit evaporation pressure side such as an evaporator.
The second expansion valve (14) may be an expansion means such as a fixed throttle if the compressor allows it.
以上のように、この考案によればモータの巻線が冷却
冷媒液に浸たることがないようにモータ冷却液量を制御
できるので、冷媒がＲ−22（CHClF2）のように化学的に
活性なものでもモータ巻線が冷媒液に浸たることによっ
て発生する巻線の絶縁劣化を防止することができ、信頼
性の高い冷媒圧縮機を得られる効果がある。As described above, according to the present invention, the amount of the motor cooling liquid can be controlled so that the winding of the motor is not submerged in the cooling refrigerant liquid, so that the refrigerant is chemically controlled like R-22 (CHClF 2 ). Even if it is active, it is possible to prevent insulation deterioration of the winding caused by immersion of the motor winding in the refrigerant liquid, and it is possible to obtain a highly reliable refrigerant compressor.
第１図はこの考案の一実施例による冷媒圧縮機のモータ
冷却方法を示す断面図、第２図は従来の冷媒圧縮機のモ
ータ冷却方法を示す断面図である。 （16）は固定子鉄心を貫通する通路、（14）は冷媒量を
調節する手段、（１）は圧縮機、（２）はモータ、
（３）は第１の膨張弁、（４）は第１の膨張弁の感温
筒、（５）は液管、（６）は溝部、（７）は固定子、
（９）は回転子、（11）は戻り通路、（12）は冷媒液、
（14）は第２の膨張弁、（15）は第２の膨張弁の感温
筒、（16）は冷媒液通路である。 なお、図中、同一符号は同一または相当部分を示す。FIG. 1 is a sectional view showing a motor cooling method of a refrigerant compressor according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a motor cooling method of a conventional refrigerant compressor. (16) is a passage that penetrates the stator core, (14) is means for adjusting the amount of refrigerant, (1) is a compressor, (2) is a motor,
(3) is the first expansion valve, (4) is the temperature sensing cylinder of the first expansion valve, (5) is the liquid pipe, (6) is the groove, (7) is the stator,
(9) is a rotor, (11) is a return passage, (12) is a refrigerant liquid,
(14) is a second expansion valve, (15) is a temperature sensing cylinder of the second expansion valve, and (16) is a refrigerant liquid passage. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
管からモータフレームの溝部に冷媒液の流量を調整する
第１の膨張弁と、この第１の膨張弁に接続され、上記モ
ータのフレームを貫通して設けられた該第１の膨張弁の
感温部と、上記モータのフレームに内蔵された固定子お
よび回転子と、上記モータの内部から上記圧縮機側へ冷
媒を戻す、戻り通路とを有した電動機の冷却装置におい
て、上記第１の膨張弁の感温筒を上記モータのフレーム
の前面に取付け、上記固定子の上記溝部以外の外周から
内周へ貫通して上記回転子の外周に達する冷媒液通路を
設けるとともに、上記モータ外部から上記冷媒液通路に
接続された第２の膨張弁を設け、上記戻り通路の入口部
のモータのフレームには上記第２の膨張弁の感温部を取
付け、上記第１の膨張弁の感温筒を螺旋状溝の出口に設
けて流量を制御すると共に、上記回転子を冷却するため
に、上記固定子を貫通して回転子外径に至る第２の冷却
通路を設け、上記モータの固定子コイルが上記モータの
冷却液に浸らないようにしたことを特徴とする電動機の
冷却装置。1. A first expansion valve for adjusting a flow rate of a refrigerant liquid from an external liquid pipe of a motor attached to a refrigerant compressor to a groove portion of a motor frame; and a first expansion valve connected to the first expansion valve, The temperature-sensing part of the first expansion valve provided through the frame, the stator and rotor built in the frame of the motor, and returning the refrigerant from the inside of the motor to the compressor side. In a cooling device for an electric motor having a passage, the temperature-sensing cylinder of the first expansion valve is attached to the front surface of the frame of the motor, and the rotor penetrates from the outer periphery except the groove portion of the stator to the inner periphery. And a second expansion valve connected to the refrigerant liquid passage from the outside of the motor, and a motor frame at the inlet of the return passage is provided with a second expansion valve of the second expansion valve. Attach the temperature sensitive part, A temperature-sensing cylinder of a tension valve is provided at the outlet of the spiral groove to control the flow rate, and a second cooling passage that penetrates the stator and reaches the outer diameter of the rotor is provided to cool the rotor. A cooling device for an electric motor, characterized in that the stator coil of the motor is prevented from being immersed in the cooling liquid of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990051053U JPH083175Y2 (en) | 1990-05-15 | 1990-05-15 | Electric motor cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990051053U JPH083175Y2 (en) | 1990-05-15 | 1990-05-15 | Electric motor cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0410565U JPH0410565U (en) | 1992-01-29 |
| JPH083175Y2 true JPH083175Y2 (en) | 1996-01-29 |
Family
ID=31570143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990051053U Expired - Lifetime JPH083175Y2 (en) | 1990-05-15 | 1990-05-15 | Electric motor cooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH083175Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220239183A1 (en) * | 2019-04-24 | 2022-07-28 | Johnson Controls Tyco IP Holdings LLP | Hermetic motor cooling system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232884U (en) * | 1975-08-29 | 1977-03-08 | ||
| JPS6014658U (en) * | 1983-07-06 | 1985-01-31 | 三菱電機株式会社 | Electric motor for driving air conditioner blower |
| FR2620205A1 (en) * | 1987-09-04 | 1989-03-10 | Zimmern Bernard | HERMETIC COMPRESSOR FOR REFRIGERATION WITH ENGINE COOLED BY GAS ECONOMIZER |
-
1990
- 1990-05-15 JP JP1990051053U patent/JPH083175Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0410565U (en) | 1992-01-29 |
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