JPS5838344Y2 - Kuukichiyou Wakinodenki Cairo - Google Patents
Kuukichiyou Wakinodenki CairoInfo
- Publication number
- JPS5838344Y2 JPS5838344Y2 JP1974128460U JP12846074U JPS5838344Y2 JP S5838344 Y2 JPS5838344 Y2 JP S5838344Y2 JP 1974128460 U JP1974128460 U JP 1974128460U JP 12846074 U JP12846074 U JP 12846074U JP S5838344 Y2 JPS5838344 Y2 JP S5838344Y2
- Authority
- JP
- Japan
- Prior art keywords
- contact
- compressor
- protection device
- temperature rise
- electromagnetic switch
- 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
Links
Description
【考案の詳細な説明】
本考案は、圧縮機用三相誘導電動機を電磁開閉器、サー
マルリレーおよび温度上昇保護装置で保護する空気調和
機の電気回路に関するものである。[Detailed Description of the Invention] The present invention relates to an electric circuit for an air conditioner that protects a three-phase induction motor for a compressor with an electromagnetic switch, a thermal relay, and a temperature rise protection device.
つぎに、上記の従来の電気回路を第１図により説明する
。Next, the above-mentioned conventional electric circuit will be explained with reference to FIG.
１は三相電源、２は単相電源、３，３′は単相電源２を
開閉する主操作スイッチ、４は電磁開閉器、４ａは電磁
開閉器接点、４ｂは電磁開閉器４のコイル、５はサーマ
ルリレー、５ａはバイメタル、５ｂはサーマルリレー５
の接点、６は圧縮機用三相誘導電動機でバイメタル５ａ
、接点４ａを介して三相電源１に接続されている。1 is a three-phase power supply, 2 is a single-phase power supply, 3 and 3' are main operation switches for opening and closing the single-phase power supply 2, 4 is an electromagnetic switch, 4a is an electromagnetic switch contact, 4b is a coil of the electromagnetic switch 4, 5 is a thermal relay, 5a is a bimetal, 5b is a thermal relay 5
Contact point 6 is a bimetallic 5a for a three-phase induction motor for a compressor.
, are connected to the three-phase power supply 1 via contacts 4a.
７は送風用電動機、８は温度上昇保護装置で、この保護
装置８は圧縮機の表面に取付けられている。7 is an electric motor for blowing air, and 8 is a temperature rise protection device, and this protection device 8 is attached to the surface of the compressor.
主操作スイッチ３，３′を閉じると、送風用電動機７が
運転され、また、電磁開閉器４のコイル４ｂにも通電さ
れるので、電磁開閉器接点４ａが閉じ、圧縮機用三相誘
導電動機６が運転される。When the main operation switches 3 and 3' are closed, the blower motor 7 is operated and the coil 4b of the electromagnetic switch 4 is also energized, so the electromagnetic switch contact 4a is closed and the three-phase induction motor for the compressor is 6 is driven.
ここで、何かの事故により圧縮機用三相誘導電動機６が
ロックした現象を考えると、バイメタル５ａに過電流が
流れ、サーマルリレー接点５ｂが開路する。Here, if we consider a phenomenon in which the compressor three-phase induction motor 6 is locked due to some kind of accident, an overcurrent flows through the bimetal 5a and the thermal relay contact 5b opens.
したがって、電磁コイル４ｂへの通電が遮断され、電磁
開閉器接点４ａが開路し、圧縮機用三相誘導電動機６へ
の通電が遮断され、同電動機６のコイル温度の一ヒ昇は
止まる。Therefore, the energization to the electromagnetic coil 4b is cut off, the electromagnetic switch contact 4a is opened, the energization to the three-phase induction motor 6 for the compressor is cut off, and the temperature of the coil of the motor 6 stops rising.
圧縮機用三相誘導電動機６への通電が遮断されると、バ
イメタル５ａの温度は下がり、サーマルリレー接点５ｂ
は閉路し、再び電磁コイル４ｂに通電され、電磁開閉器
接点４ａが閉路し、再び圧縮機用三相誘導電動機６に過
電流が流れる。When the power supply to the three-phase induction motor 6 for the compressor is cut off, the temperature of the bimetal 5a decreases, and the thermal relay contact 5b
is closed, the electromagnetic coil 4b is energized again, the electromagnetic switch contact 4a is closed, and an overcurrent flows through the compressor three-phase induction motor 6 again.
この動作がくり返されるが、圧縮機用三相誘導電動機６
のコイル温度は徐々に上昇する。This operation is repeated, but the three-phase induction motor 6 for the compressor
The coil temperature gradually increases.
圧縮機の表面温度もそれにともなって上昇する。The surface temperature of the compressor also rises accordingly.
そして、圧縮機の表面温度が温度上昇保護装置８のオー
プン温度に達すると、この保護装置８の接点が開路し、
圧縮機用三相誘導電動機６への過電流通型が中止され、
温度上昇は止まる。When the surface temperature of the compressor reaches the open temperature of the temperature rise protection device 8, the contacts of this protection device 8 open,
The overcurrent type to the three-phase induction motor 6 for the compressor is discontinued,
The temperature will stop rising.
ところが、圧縮機用三相誘導電動機６のコイル温度と圧
縮機表面温度との間にはかなりの差が生じるため、圧縮
機表面温度が温度上昇保護装置８のオープン温度に達す
るころには、すでに圧縮機用三相誘導電動機６のコイル
は異常温度まで上昇してしまうことがある。However, since there is a considerable difference between the coil temperature of the three-phase induction motor 6 for the compressor and the compressor surface temperature, by the time the compressor surface temperature reaches the open temperature of the temperature rise protection device 8, the The coil of the three-phase induction motor 6 for the compressor may rise to an abnormal temperature.
本考案は上記の欠点を除くためのもので、ヒータ付の温
度上昇保護装置を設け、温度上昇保護装置のヒータとサ
ーマルリレーの逆接点とを直列に結線し、サーマルリレ
ーの正接点が開路するとともに逆接点が閉路したときに
は、温度上昇保護装置のヒータに電流が流れて発熱し、
温度上昇保護装置のオープン温度の到達を速めるように
したものである。The present invention is intended to eliminate the above-mentioned drawbacks. A temperature rise protection device with a heater is provided, and the heater of the temperature rise protection device and the reverse contact of the thermal relay are connected in series, and the positive contact of the thermal relay is opened. When the reverse contact closes, current flows to the heater of the temperature rise protection device and generates heat.
This is designed to speed up the temperature rise protection device reaching its opening temperature.
以下、本考案の一実施態様を第２図により説明する。Hereinafter, one embodiment of the present invention will be explained with reference to FIG.
１１は三相電源、１２は単相電源、１３．１３’は単相
電源１２を開閉する主操作スイッチ、１４は電磁開閉器
、１４ ａは電磁開閉器接点、１４ ｂは電磁開閉器１
４のコイル、１５はサーマルリレー、１５ａはバイメタ
ル、１５ｂはサーマルリレー１５の正接点、１５Ｃはサ
ーマルリレー１５の逆接点、１６は圧縮機用三相誘導電
動機でバイメタル１５ａ、接点１４ ａを介して三相電
源１１に接続されている。11 is a three-phase power supply, 12 is a single-phase power supply, 13.13' is a main operation switch that opens and closes the single-phase power supply 12, 14 is an electromagnetic switch, 14 a is an electromagnetic switch contact, 14 b is an electromagnetic switch 1
Coil 4, 15 is a thermal relay, 15a is a bimetal, 15b is a positive contact of the thermal relay 15, 15C is a reverse contact of the thermal relay 15, 16 is a three-phase induction motor for a compressor, which is connected to a bimetal 15a through a contact 14a. It is connected to a three-phase power supply 11.
１７は送風用電動機、１８は温度上昇保護装置で、この
保護装置１８は圧縮機の表面に取付けられている。17 is an electric motor for blowing air; 18 is a temperature rise protection device; this protection device 18 is attached to the surface of the compressor.
１８ ａは温度上昇保護装置１８の接点、１８ ｂは温
度上昇保護装置１８内のヒータで゛、このヒータ１８ｂ
とサーマルリレー１５の逆接点１５Ｃとは直列に結線さ
れている。18a is a contact point of the temperature rise protection device 18, 18b is a heater in the temperature rise protection device 18, and this heater 18b
and the reverse contact 15C of the thermal relay 15 are connected in series.
主操作スイッチ１３．１３’を閉路すると送風用電動機
１７が運転され、また電磁開閉器１４のコイル１４ｂに
も通電されるので電磁開閉器接点１４ ａが閉路し、圧
縮機用三相誘導電動機１６が運転される。When the main operation switch 13.13' is closed, the blower motor 17 is operated, and the coil 14b of the electromagnetic switch 14 is also energized, so the electromagnetic switch contact 14a is closed, and the three-phase induction motor 16 for the compressor is closed. is driven.
事故により圧縮機用三相誘導電動機１６がロックした場
合には、バイメタル１５ ａに過電流が発生し、サーマ
ルリレー接点１５ｂが開路するとともにサーマルリレー
接点１５ Ｃが閉路する。When the three-phase induction motor 16 for the compressor is locked due to an accident, an overcurrent is generated in the bimetal 15a, the thermal relay contact 15b is opened, and the thermal relay contact 15C is closed.
これにより電磁開閉器１４のコイル１４ｂへの通電が中
断され、圧縮機用三相誘導電動機１６への通電が中断さ
れると同時に、温度上昇保護装置１８のヒータ１８ｂに
通電される。As a result, the energization to the coil 14b of the electromagnetic switch 14 is interrupted, and at the same time, the energization to the compressor three-phase induction motor 16 is interrupted, and at the same time, the heater 18b of the temperature rise protection device 18 is energized.
圧縮機用三相誘導電動機１６への通電が中断されるとバ
イメタル１５ ａの温度は下がり、サーマルリレー１５
の接点１５ｂが閉路するとともに接点１５ Ｃが開路し
て、再び電磁開閉器１４のコイル１４ｂに通電され、圧
縮機用三相誘導電動機１６に過電流が流れる。When the power supply to the three-phase induction motor 16 for the compressor is interrupted, the temperature of the bimetal 15a decreases, and the thermal relay 15
The contact 15b is closed and the contact 15C is opened, the coil 14b of the electromagnetic switch 14 is energized again, and an overcurrent flows through the three-phase induction motor 16 for the compressor.
この動作がくり返されるが、圧縮機用三相誘導電動機１
６のコイル温度は徐々に上昇し、それにともなって圧縮
機の表面温度も上昇する。This operation is repeated, but the three-phase induction motor 1 for the compressor
The temperature of the coil 6 gradually rises, and the surface temperature of the compressor also rises accordingly.
しかし、サーマルリレー１５の接点１５ Ｃが閉路して
いる時には、温度上昇保護装置１８のヒータ１８ ｂに
通電されているので、この部分では強制的に温度上昇が
行なわれる。However, when the contact 15C of the thermal relay 15 is closed, the heater 18b of the temperature rise protection device 18 is energized, so the temperature is forcibly increased in this part.
したがって、温度上昇保護装置１８はすぐにオープン温
度に達し、接点１８ａを開路し、圧縮機用三相誘導電動
機１６への過電流通電は中断され、同機のコイル温度上
昇が低くおさえられる。Therefore, the temperature rise protection device 18 quickly reaches the open temperature, the contact 18a is opened, the overcurrent supply to the three-phase induction motor 16 for the compressor is interrupted, and the temperature rise in the coil of the same machine is suppressed to a low level.
以上説明したように、本考案は温度上昇保護装置のヒー
タをサーマルリレーの逆接点に直列に結線したので、圧
縮機用三相誘導型・動機をロックによる焼損から保護す
ることができ、安全性を向上することができる。As explained above, in this invention, the heater of the temperature rise protection device is connected in series with the reverse contact of the thermal relay, so the three-phase induction type compressor/motor can be protected from burnout due to locking, and safety is improved. can be improved.
第１図は圧縮機用三相誘導電動機を電磁開閉器、サーマ
ルリレーおよび温度上昇保護装置で保護する空気調和機
の従来の電気回路を示す結線図、第２図は本考案による
電気回路を示す結線図である。
１１・・・・・・三相電源、１２・・・・・・単相電源
、１３．１３’・・・・・・主操作スイッチ、１４・・
・・・・電磁開閉器、１４ａ・・・・・・電磁開閉器接
点、１４ｂ・・・・・・電磁開閉器のコイル、１５・・
・・・・サーマルリレー、１５ ａ・・・・・・バイメ
タル、１５ｂ、１５Ｃ・・・・・・サーマルリレーの接
点、１６・・・・・・圧縮機用三相誘導電動機、１７・
・・・・・送風用電動機、１８・・・・・・温度上昇保
護装置、１８ ａ・・・・・・温度上昇保護装置の接点
、１８ ｂ・・・・・・温度上昇保護装置のヒータ。Figure 1 is a wiring diagram showing a conventional electric circuit for an air conditioner that protects a three-phase induction motor for a compressor with an electromagnetic switch, a thermal relay, and a temperature rise protection device, and Figure 2 shows an electric circuit according to the present invention. It is a wiring diagram. 11...Three-phase power supply, 12...Single-phase power supply, 13.13'...Main operation switch, 14...
... Electromagnetic switch, 14a... Electromagnetic switch contact, 14b... Coil of electromagnetic switch, 15...
...Thermal relay, 15 a... Bimetal, 15b, 15C... Thermal relay contact, 16... Three-phase induction motor for compressor, 17.
...Blower electric motor, 18...Temperature rise protection device, 18a...Temperature rise protection device contact, 18b...Temperature rise protection device heater .
Claims (1)
点１４ ａとサーマルリレー１５のバイメタル１５ａと
を直列にし、一方、電磁開閉器１４のコイル１４ｂとサ
ーマルリレー１５の接点１５ｂと温度上昇保護装置１８
の接点１８ ａとを直列に接続して圧縮機用三相誘導電
動機１６を保護する空気調和機の電気回路において、温
度上昇保護装置１８を加熱するヒータ１８ ｂを設け、
該ヒータ１８ ｂを前記サーマルリレー１５の接点１５
ｂの逆接点１５ Ｃに直列接続して、温度上昇保護装置
１８の接点１８ ａと電磁開閉器１４のコイル１４ｂと
の直列回路とヒータ１８ｂとを切換接続したことを特徴
とする空気調和機の電気回路。The switching contact 14a of the electromagnetic switch 14 and the bimetal 15a of the thermal relay 15 are connected in series to the three-phase induction motor 16 for the compressor, and the coil 14b of the electromagnetic switch 14 and the contact 15b of the thermal relay 15 are connected in series to protect against temperature rise. device 18
In the electrical circuit of an air conditioner that protects the compressor three-phase induction motor 16 by connecting the contacts 18a in series, a heater 18b is provided to heat the temperature rise protection device 18,
The heater 18b is connected to the contact 15 of the thermal relay 15.
An air conditioner characterized in that the series circuit of the contact 18a of the temperature rise protection device 18 and the coil 14b of the electromagnetic switch 14 and the heater 18b are connected in series to the reverse contact 15C of the temperature rise protection device 18. electric circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1974128460U JPS5838344Y2 (en) | 1974-10-25 | 1974-10-25 | Kuukichiyou Wakinodenki Cairo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1974128460U JPS5838344Y2 (en) | 1974-10-25 | 1974-10-25 | Kuukichiyou Wakinodenki Cairo |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5154948U JPS5154948U (en) | 1976-04-27 |
| JPS5838344Y2 true JPS5838344Y2 (en) | 1983-08-30 |
Family
ID=28384380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1974128460U Expired JPS5838344Y2 (en) | 1974-10-25 | 1974-10-25 | Kuukichiyou Wakinodenki Cairo |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5838344Y2 (en) |
-
1974
- 1974-10-25 JP JP1974128460U patent/JPS5838344Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5154948U (en) | 1976-04-27 |
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