JPH0618166Y2 - Refrigerator with overvoltage protection device - Google Patents
Refrigerator with overvoltage protection deviceInfo
- Publication number
- JPH0618166Y2 JPH0618166Y2 JP1987161735U JP16173587U JPH0618166Y2 JP H0618166 Y2 JPH0618166 Y2 JP H0618166Y2 JP 1987161735 U JP1987161735 U JP 1987161735U JP 16173587 U JP16173587 U JP 16173587U JP H0618166 Y2 JPH0618166 Y2 JP H0618166Y2
- Authority
- JP
- Japan
- Prior art keywords
- refrigerator
- voltage
- relay
- power supply
- protection device
- 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
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
【考案の詳細な説明】 ［考案の目的］ （産業上の利用分野） 本考案は、電源電圧が冷蔵庫の定格電圧よりも所定の範
囲以上となったときに、冷蔵庫の電源回路を開放するよ
うにした過電圧保護装置付冷蔵庫に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention is designed to open the power supply circuit of a refrigerator when the power supply voltage exceeds a predetermined range of the rated voltage of the refrigerator. The present invention relates to a refrigerator with an overvoltage protection device.
（従来の技術） 近時新築された家では、単相三線式の配線が多くなって
いる。即ち、単相２００Ｖの電源を動力用モータまたは
電熱体等が使用されるコンセントに接続し、２００Ｖの
電源線の一方或いは他方と中性線との間から取出された
１００Ｖの電源を家庭用電気機器が使用されるコンセン
トに接続している。(Prior Art) Recently, in newly built houses, the number of single-phase three-wire wirings is increasing. That is, a single-phase 200V power source is connected to an outlet in which a power motor or electric heating element is used, and a 100V power source taken out between one or the other of the 200V power line and the neutral line is used for household electric power. The equipment is plugged into the outlet.
（考案が解決しようとする問題点） 上述の配線では、工事に際して１００Ｖのコンセントに
誤って２００Ｖを接続したときにそのコンセントに１０
０Ｖ定格電圧の冷蔵庫の電源プラグを差込んだ場合若し
くは使用者が２００Ｖのコンセントに誤って該冷蔵庫の
電源プラグを差込んだ場合には、冷蔵庫の電気部品に焼
損等の事故が発生するという問題がある。(Problems to be solved by the invention) With the above wiring, when accidentally connecting 200V to a 100V outlet during construction,
When the power plug of a refrigerator with a 0V rated voltage is inserted, or when the user mistakenly inserts the power plug of the refrigerator into a 200V outlet, an accident such as burnout may occur in electric parts of the refrigerator. There is.
尚、我が国においては冷蔵庫を輸出仕様（定格電圧２２
０Ｖ，２４０Ｖ等）にして諸外国に輸出しており、これ
らの中には電源電圧の不安定な地域があって冷蔵庫の電
源電圧が定格電圧より大きく変化することがあり、この
場合でも上述したような問題が生ずる。It should be noted that in Japan, refrigerators have export specifications (rated voltage 22
0V, 240V, etc.) and exported to other countries. In some of these areas, the power supply voltage is unstable and the power supply voltage of the refrigerator may change more than the rated voltage. Such problems arise.
そこで本考案は、定格電圧よりも所定の範囲以上となっ
た場合にも、電気部品の焼損等の事故を防止し得る過電
圧保護装置付冷蔵庫を提供するにある。Therefore, the present invention is to provide a refrigerator with an overvoltage protection device that can prevent accidents such as burning of electric parts even when the voltage exceeds a predetermined range from the rated voltage.
［考案の構成］ （問題点を解決するための手段） 本考案の過電圧保護装置付冷蔵庫は、冷蔵庫の電源電圧
若しくはこれと比例する電圧が電圧調整手段及びリセッ
トスイッチを直列に介して印加されるリレーを設けて、
前記電源電圧が定格電圧よりも所定の範囲以上となった
ときに前記リレーを作動させてその接点を開放させるよ
うになし、このリレーの接点を前記冷蔵庫の電源回路に
接続した構成に特徴を有する。[Structure of the Invention] (Means for Solving the Problems) In the refrigerator with an overvoltage protection device of the present invention, a power supply voltage of the refrigerator or a voltage proportional thereto is applied through a voltage adjusting means and a reset switch in series. With a relay,
It is characterized in that the relay is operated to open the contact when the power supply voltage becomes a predetermined range or more than the rated voltage, and the contact of the relay is connected to the power supply circuit of the refrigerator. .
（作用） 本考案の過電圧保護装置付冷蔵庫は、冷蔵庫の電源電圧
が定格電圧よりも所定の範囲以上となったときにリレー
が作動するので、その接点の開放により冷蔵庫の電源回
路を遮断する。そして、電源電圧の一時的な変化によっ
てリレーが作動した後にその電源電圧が定格電圧に戻っ
た場合には、リレーは、通常、作動電圧と復帰電圧との
間にヒステリシス特性を有するので、復帰しないことに
なるが、ここで、リセットスイッチを開放させることに
よって、冷蔵庫の電源プラグをコンセントから抜かなく
てもリレーを復帰させることができる。(Operation) In the refrigerator with the overvoltage protection device of the present invention, the relay operates when the power supply voltage of the refrigerator exceeds the rated voltage by a predetermined range or more, and thus the power supply circuit of the refrigerator is cut off by opening the contact. Then, when the power supply voltage returns to the rated voltage after the relay operates due to a temporary change in the power supply voltage, the relay usually has a hysteresis characteristic between the operating voltage and the return voltage, and therefore does not recover. By opening the reset switch, the relay can be restored without disconnecting the power plug of the refrigerator from the outlet.
（従来の技術） 以下、本考案の一実施例につき図面を参照して説明す
る。(Prior Art) An embodiment of the present invention will be described below with reference to the drawings.
１は図示しないコンセントに差込まれる電源プラグで、
その両端子に電源回路たる母線２及び３が接続されてお
り、一方の母線２の端部は例えば定格電圧１００Ｖの冷
蔵庫４の一方の電源端子４ａに接続されている。５は全
波整流回路で、これの交流入力端子５ａ及び５ｂは夫々
母線２及び母線３に接続され、直流出力端子５ｃ，５ｄ
間に平滑用コンデンサ６が接続されているとともに、こ
の平滑用コンデンサ６と並列に電圧調整手段たる可変抵
抗器７，リレー８及び常閉形のリセットスイッチ９の直
列回路が接続されている。リレー８は常閉形の接点８ａ
を有しており、この接点８ａは母線３と冷蔵庫４の他方
の電源端子４ｂとの間に接続されている。ここで、リレ
ー８は、可変抵抗器７の抵抗を調整することにより、電
源電圧即ち全波整流回路５の交流入力端子５ａ及び５ｂ
間の電圧が冷蔵庫４の定格電圧の所定の範囲たる１２０
％即ち１２０Ｖ未満の場合には作動せず、１２０％即ち
１２０Ｖ以上になった場合に作動するようになされてい
る。又、リレー８は、一度作動すると冷蔵庫４の定格電
圧よりも低い電圧（例えば９０Ｖ）以下にならないと復
帰しないヒステリシス特性を有する。1 is a power plug plugged into an outlet not shown,
Bus terminals 2 and 3 which are power supply circuits are connected to both terminals, and an end portion of one bus bar 2 is connected to one power supply terminal 4a of a refrigerator 4 having a rated voltage of 100V, for example. Reference numeral 5 is a full-wave rectifier circuit, the AC input terminals 5a and 5b of which are connected to the bus 2 and the bus 3, respectively, and the DC output terminals 5c and 5d.
A smoothing capacitor 6 is connected in between, and a series circuit of a variable resistor 7, a relay 8 and a normally-closed reset switch 9, which are voltage adjusting means, is connected in parallel with the smoothing capacitor 6. Relay 8 is normally closed contact 8a
This contact 8a is connected between the bus bar 3 and the other power supply terminal 4b of the refrigerator 4. Here, the relay 8 adjusts the resistance of the variable resistor 7 to adjust the resistance of the variable resistor 7, that is, the AC input terminals 5a and 5b of the full-wave rectifier circuit 5.
The voltage between them is 120 which is a predetermined range of the rated voltage of the refrigerator 4.
%, Ie, less than 120V, it does not operate, and 120%, ie, 120V or more, it operates. Also, the relay 8 has a hysteresis characteristic that, once it operates, it does not recover unless the voltage becomes lower than the rated voltage of the refrigerator 4 (for example, 90 V).
次に上記構成の作用について説明する。Next, the operation of the above configuration will be described.
図示しないコンセントに冷蔵庫４の定格電圧即ち交流１
００Ｖが供給されている場合、コンセントに電源プラグ
１を差込むと、冷蔵庫４の電源端子４ａ，４ｂ間に１０
０Ｖが印加され、各種の電気部品に通電されて冷蔵庫４
が運転を開始する。また、全波整流回路５の交流入力端
子５ａ，５ｂ間にも交流１００Ｖが印加され、この電圧
は全波整流回路５で整流され、且つ平滑コンデンサ６で
平滑されて電源電圧１００Ｖに比例する直流電圧として
可変抵抗器７を通してリレー８に印加される。従って、
リレー８は作動せず、接点８ａは閉成状態を保つので、
冷蔵庫４は運転を継続する。The rated voltage of the refrigerator 4, that is, the alternating current 1 in an outlet not shown.
When the power plug 1 is inserted into the outlet when 00V is supplied, the power supply terminals 4a and 4b of the refrigerator 4 are connected to each other by 10
0V is applied, electricity is supplied to various electric parts, and the refrigerator 4
Starts driving. In addition, AC 100V is applied between the AC input terminals 5a and 5b of the full-wave rectifier circuit 5, and this voltage is rectified by the full-wave rectifier circuit 5 and smoothed by the smoothing capacitor 6 to generate a DC voltage proportional to 100V of the power supply voltage. The voltage is applied to the relay 8 through the variable resistor 7. Therefore,
Since the relay 8 does not operate and the contact 8a remains closed,
The refrigerator 4 continues to operate.
図示しないコンセントに冷蔵庫４の定格電圧の所定の範
囲例えば１２０％以上の電圧が掛った場合、例えば単相
三線式における２００Ｖのコンセントに電源プラグ１を
差込んだすると、当然のことながら冷蔵庫４の電源端子
４ａ，４ｂ間に２００Ｖが印加される。同時に、全波整
流回路５の交流入力端子５ａ，５ｂ間にも交流２００Ｖ
が印加され、この電圧は全波整流回路５で整流され、且
つ平滑コンデンサ６で平滑されて電源電圧２００Ｖに比
例する直流電圧が可変抵抗器７を通してリレー８に印加
される。すると、リレー８が作動して接点８ａを開放し
て他方の母線３を開放するので、冷蔵庫４は２００Ｖの
過電圧から開放され、冷蔵庫４の各種電気部品の過電圧
による焼損等の事故が防止できる。When a voltage within a predetermined range of the rated voltage of the refrigerator 4, for example, 120% or more, is applied to an outlet not shown, for example, if the power plug 1 is inserted into a 200V outlet of a single-phase three-wire system, the refrigerator 200V is applied between the power supply terminals 4a and 4b. At the same time, AC 200V is also applied between the AC input terminals 5a and 5b of the full-wave rectifier circuit 5.
This voltage is rectified by the full-wave rectifier circuit 5, smoothed by the smoothing capacitor 6, and a DC voltage proportional to the power supply voltage 200V is applied to the relay 8 through the variable resistor 7. Then, the relay 8 operates to open the contact 8a and open the other bus bar 3, so that the refrigerator 4 is released from an overvoltage of 200 V, and accidents such as burning due to overvoltage of various electric parts of the refrigerator 4 can be prevented.
リレー８が作動した後は、電源プラグ１をコンセントか
ら抜きまたはリセットスイッチ９を押してリレー８を断
電復帰させれば、接点８ａが閉成して元の状態に戻る。After the relay 8 is activated, if the power plug 1 is pulled out from the outlet or the reset switch 9 is pushed to restore the relay 8 by disconnection, the contact 8a is closed and the original state is restored.
上記実施例によれば、電源電圧が冷蔵庫４の定格電圧よ
りも所定の範囲以上となったとき、リレー８を作動させ
てその接点８ａを開放することにより冷蔵庫４の母線３
を遮断するので、冷蔵庫４の各種電気部品が焼損等の事
故を発生することを防止できる。しかも、リレー８が一
度作動した後は、電源プラグ１をコンセントから抜き又
はリセットスイッチ９を開放させるまではリレー８は復
帰せずに冷蔵庫４の電源が遮断されたままとなるので、
過電圧の原因が解消されて使用者等が意思をもって再運
転を開始させることになるものである。According to the above-mentioned embodiment, when the power supply voltage becomes higher than the rated voltage of the refrigerator 4 by a predetermined range or more, the relay 8 is operated to open the contact 8a thereof, so that the bus bar 3 of the refrigerator 4 is opened.
Since the electric power is shut off, it is possible to prevent accidents such as burnout of various electric parts of the refrigerator 4. Moreover, after the relay 8 is once actuated, the relay 8 does not recover and the power of the refrigerator 4 remains shut off until the power plug 1 is unplugged from the outlet or the reset switch 9 is opened.
The cause of the overvoltage is eliminated, and the user or the like will intentionally start restarting.
尚、本考案は上記し且つ図面に示す実施例にのみ限定さ
れるものではなく、例えば、リレー８の代りに母線２，
３間に交流用のリレーを電圧調整手段及びリセットスイ
ッチを直列に介して接続するようにしても良い等、要旨
を逸脱しない範囲で種々の変形が可能である。The present invention is not limited to the embodiment described above and shown in the drawings. For example, instead of the relay 8, the bus bar 2,
Various modifications may be made without departing from the scope of the invention, such as connecting an AC relay between the three via a voltage adjusting means and a reset switch in series.
以上の説明から明らかなように本考案の過電圧保護装置
付冷蔵庫は、冷蔵庫の電源電圧が定格電圧よりも所定の
範囲以上となったとき作動して接点を開放するリレーを
設け、このリレーの接点を前記冷蔵庫の電源回路に接続
したので、冷蔵庫にその定格電圧よりも高い過電圧が印
加された場合でも電気部品の焼損等の事故を防止し得、
しかも、一時的な電源電圧の変化によりリレーが作動し
た場合には、電源プラグをコンセントから抜かなくても
リセットスイッチを開放させることによってリレーを復
帰させることができるという効果を奏する。As is clear from the above description, the refrigerator with an overvoltage protection device of the present invention is provided with a relay that operates to open the contact when the power supply voltage of the refrigerator exceeds the rated voltage by a predetermined range or more. Since it is connected to the power supply circuit of the refrigerator, even if an overvoltage higher than the rated voltage is applied to the refrigerator, it is possible to prevent accidents such as burnout of electrical parts,
In addition, when the relay operates due to a temporary change in the power supply voltage, the relay can be restored by opening the reset switch without disconnecting the power plug from the outlet.
【図面の簡単な説明】 第１図は本考案の一実施例を示す結線図である。 図中、２，３は母線（電源回路）、４は冷蔵庫、４ａ，
４ｂは電源端子、７は可変抵抗器（電圧調整手段）、８
はリレー、８ａは接点、９はリセットスイッチを示す。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a connection diagram showing an embodiment of the present invention. In the figure, 2 and 3 are bus bars (power supply circuits), 4 is a refrigerator, 4a,
4b is a power supply terminal, 7 is a variable resistor (voltage adjusting means), 8
Is a relay, 8a is a contact, and 9 is a reset switch.
Claims (1)
電圧が電圧調整手段及びリセットスイッチを直列に介し
て印加されるリレーを設けて、前記電源電圧が定格電圧
よりも所定の範囲以上となったときに前記リレーを作動
させてその接点を開放させるようになし、このリレーの
接点を前記冷蔵庫の電源回路に接続したことを特徴とす
る過電圧保護装置付冷蔵庫。1. A relay to which a power supply voltage of a refrigerator or a voltage proportional to the power supply voltage is applied via a voltage adjusting means and a reset switch in series, and the power supply voltage exceeds a rated voltage by a predetermined range or more. A refrigerator with an overvoltage protection device, characterized in that the relay is sometimes operated to open the contact, and the contact of the relay is connected to the power supply circuit of the refrigerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987161735U JPH0618166Y2 (en) | 1987-10-22 | 1987-10-22 | Refrigerator with overvoltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987161735U JPH0618166Y2 (en) | 1987-10-22 | 1987-10-22 | Refrigerator with overvoltage protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0166575U JPH0166575U (en) | 1989-04-27 |
| JPH0618166Y2 true JPH0618166Y2 (en) | 1994-05-11 |
Family
ID=31444938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987161735U Expired - Lifetime JPH0618166Y2 (en) | 1987-10-22 | 1987-10-22 | Refrigerator with overvoltage protection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0618166Y2 (en) |
-
1987
- 1987-10-22 JP JP1987161735U patent/JPH0618166Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0166575U (en) | 1989-04-27 |
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