JPH0544585B2 - - Google Patents
Info
- Publication number
- JPH0544585B2 JPH0544585B2 JP61170625A JP17062586A JPH0544585B2 JP H0544585 B2 JPH0544585 B2 JP H0544585B2 JP 61170625 A JP61170625 A JP 61170625A JP 17062586 A JP17062586 A JP 17062586A JP H0544585 B2 JPH0544585 B2 JP H0544585B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- temperature
- inverter
- commercial
- refrigerator
- 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 - Fee Related
Links
- 238000005057 refrigeration Methods 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000512259 Ascophyllum nodosum Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明はインバータ電源から冷凍装置を構成す
る能力可変形コンプレツサへ周波数制御された電
力を供給すると共に、スイツチの切換えにより商
用電源から前記能力可変形コンプレツサへ直接電
力を供給する冷凍装置の給電制御装置に関する。[Detailed Description of the Invention] (a) Industrial Application Field The present invention supplies frequency-controlled power from an inverter power source to a variable capacity compressor that constitutes a refrigeration system, and also supplies power from a commercial power source to a variable capacity compressor by switching a switch. The present invention relates to a power supply control device for a refrigeration system that directly supplies power to a variable compressor.
(ロ) 従来の技術
例えば実開昭58−188554号公報には能力可変形
圧縮機をそれぞれ有する複数の冷凍サイクルと、
前記各圧縮機の駆動用モータを駆動するためのイ
ンバータ回路と、このインバータ回路から前記各
駆動用モータへの通電路または電源から各駆動用
モータへの通電路を選択的に形成する複数個のス
イツチと、負荷の大きさに応じて前記各スイツチ
の制御およびインバータ回路の制御を行なう制御
部とを具備した冷凍サイクル装置が開示されてい
る。(b) Conventional technology For example, Japanese Utility Model Application Publication No. 58-188554 discloses a plurality of refrigeration cycles each having a variable capacity compressor,
an inverter circuit for driving the drive motor of each of the compressors; and a plurality of inverter circuits that selectively form an energization path from the inverter circuit to each of the drive motors or from a power source to each of the drive motors. A refrigeration cycle device is disclosed that includes a switch and a control section that controls each of the switches and an inverter circuit according to the magnitude of the load.
(ハ) 発明が解決しようとする問題点
上記従来の技術において、負荷の大きさに応じ
て各圧縮機のうちいずれかをインバータ回路にて
駆動し、且つその他の圧縮機を電源電圧にて駆動
するとき、前記インバータ回路又は温度センサ等
に故障が発生し、例えば前記インバータ回路に過
電流が流れた場合又は庫内温度制御が行なわれな
くなつた場合には、前記インバータ回路は動作を
停止して圧縮機へ電力を供給しなくなり、電源か
ら直接電力を供給されてる圧縮機のみの運転にな
り、このため、冷却負荷が大きい場合には庫内温
度の上昇を招くという問題点が発生していた。本
発明は前記問題点を解決することを目的とする。(c) Problems to be Solved by the Invention In the above conventional technology, one of the compressors is driven by an inverter circuit depending on the size of the load, and the other compressors are driven by the power supply voltage. When a failure occurs in the inverter circuit or the temperature sensor, for example, if an overcurrent flows through the inverter circuit or if the temperature inside the refrigerator is no longer controlled, the inverter circuit stops operating. The compressor is no longer supplied with electricity, and only the compressor that is supplied with electricity directly from the power supply is operated, which causes the problem of an increase in temperature inside the refrigerator when the cooling load is large. Ta. The present invention aims to solve the above problems.
(ニ) 問題点を解決するための手段
本発明は上記問題点を解決するために成された
もので、以下実施例に基づいて説明すると、３相
商用電源１に接続されて冷凍装置を構成する能力
可変形の第１、第２コンプレツサ５，６へ周波数
制御された電力を供給するインバータ電源７と、
庫内に設けられた第１温度センサ４３から温度信
号を入力してインバータ電源７へ前記電力の周波
数を決める周波数信号を出力するコントローラ１
５と、インバータ電源７から第１、第２コンプレ
ツサ５，６への通電路と、商用電源１から第１、
第２コンプレツサ５，６への通電路とを選択的に
切換える第１〜第４リレー８，９，１１，１２の
第１〜第４常開スイツチ８Ｓ，９Ｓ，１１Ｓ，１
２Ｓと、庫内に設けられた商用運転用の第２温度
センサ５２からの信号を入力して商用電源１から
第１、第２コンプレツサ５，６への通電を制御す
る商用運転コントロール基盤３２とを備えた冷凍
装置の給電制御装置において、インバータ電源７
から第１、第２コンプレツサ５，６へ電力が供給
されているとき、例えば第１温度センサ４３の断
線等により温度制御が不能になり、庫内温度が予
じめ設定された上限温度域又は下限温度域になつ
たことを検出する第３温度センサ５３と、この温
度センサの前記検出が所定時間継続したとき信号
を出力するタイマ回路３１Ｔとを備え、このタイ
マ回路３１Ｔからの信号に基づいて前記第１、第
２常開スイツチ８Ｓ，９Ｓをオフさせると共に、
第３、第４常開スイツチ１１Ｓ，１２Ｓをオンさ
せ、前記第１、第２コンプレツサ５，６へ商用電
力を供給させると共に、商用運転用の第２温度セ
ンサ５２の検出温度に基づいて通電制御を行なわ
せる冷凍装置の給電制御装置を提供するものであ
る。(d) Means for Solving the Problems The present invention has been made to solve the above problems, and will be explained below based on an embodiment. an inverter power supply 7 that supplies frequency-controlled power to the first and second compressors 5 and 6 with variable capacity;
A controller 1 inputs a temperature signal from a first temperature sensor 43 provided in the refrigerator and outputs a frequency signal determining the frequency of the electric power to the inverter power supply 7.
5, an energizing path from the inverter power supply 7 to the first and second compressors 5 and 6, and a power supply path from the commercial power supply 1 to the first and second compressors 5 and 6;
The first to fourth normally open switches 8S, 9S, 11S, 1 of the first to fourth relays 8, 9, 11, 12 selectively switch the energization paths to the second compressors 5, 6.
2S, and a commercial operation control board 32 that inputs a signal from a second temperature sensor 52 for commercial operation provided in the refrigerator and controls the supply of electricity from the commercial power source 1 to the first and second compressors 5 and 6. In the power supply control device for the refrigeration equipment, the inverter power supply 7
When power is being supplied to the first and second compressors 5, 6 from It is equipped with a third temperature sensor 53 that detects that the temperature has reached the lower limit temperature range, and a timer circuit 31T that outputs a signal when the detection of the temperature sensor continues for a predetermined period of time, and based on the signal from the timer circuit 31T. While turning off the first and second normally open switches 8S and 9S,
The third and fourth normally open switches 11S and 12S are turned on to supply commercial power to the first and second compressors 5 and 6, and control energization based on the temperature detected by the second temperature sensor 52 for commercial operation. The present invention provides a power supply control device for a refrigeration system that performs the following operations.
(ホ) 作 用
実施例によると、インバータ電源７から周波数
制御された電力が、第１又は第２コンプレツサ５
又は６に供給されているとき、インバータ電源７
に過電流が発生した場合又は、第１温度センサ４
３の不良又はコントローラ１５内の基板の不良等
により温度制御が不能になつて、第３温度センサ
５３が検出する温度が所定時間継続して上限温度
域又は下限温度域のときには、商用運転コントロ
ール基板３２が動作し、第１、第２コンプレツサ
５，６へは商用電源から直接電力が供給され、
又、第２温度センサ５２は庫内温度を検出してこ
の庫内温度に基づいて夫々のコンプレツサへの通
電は制御され、温度制御が行なわれる。(E) Effect According to the embodiment, the frequency-controlled power from the inverter power supply 7 is supplied to the first or second compressor 5.
or 6, when the inverter power supply 7
or when an overcurrent occurs in the first temperature sensor 4.
If temperature control becomes impossible due to a defect in the third temperature sensor 53 or a defect in the board in the controller 15, and the temperature detected by the third temperature sensor 53 continues to be in the upper limit temperature range or the lower limit temperature range for a predetermined period of time, the commercial operation control board 32 is in operation, and the first and second compressors 5 and 6 are directly supplied with power from the commercial power source.
Further, the second temperature sensor 52 detects the temperature inside the refrigerator, and based on this temperature inside the refrigerator, the supply of electricity to each compressor is controlled, thereby performing temperature control.
(ヘ) 実施例
以下、本発明の一実施例を図面に基づいて詳細
に説明する。(F) Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.
第１図は冷凍装置の給電制御装置概略ブロツク
図を示し、Ａはインバータ運転用回路、Ｂは商用
運転用回路、１５はコントローラで、このコント
ローラはＩ／Ｏ基板４０、コントロール基板４
１、及び表示部４２から構成され、例えば庫内温
度を検出するインバータ制御用の第１温度センサ
４３から温度信号がＩ／Ｏ基板４０へ与えられ
る。又、７はインバータ基板４５とインバータ
IC４６とから構成されたインバータ電源で、こ
のインバータ電源７から周波数制御された電力が
３相用の第１、第２ロータリ式コンプレツサ（以
下コンプという）５，６を備えたコンプレツサ運
転回路４７へ出力される。さらに、４８はインバ
ータ運転用操作回路で、この操作回路の動作によ
り第１、第２コンプ５，６の一方づつの運転及び
同時運転は制御される。又、３２は商用運転コン
トロール基板、５０は商用運転用操作回路、３１
は温度警報基板でタイマ回路３１Ｔを備えてお
り、又、商用運転コントロール基板３２及び温度
警報基板３１には夫々庫内温度を感知する商用運
転用の第２温度センサ５２及び切換用の第３温度
センサ５３が接続されている。 FIG. 1 shows a schematic block diagram of a power supply control device for a refrigeration system, where A is a circuit for inverter operation, B is a circuit for commercial operation, and 15 is a controller, which includes an I/O board 40 and a control board 4.
A temperature signal is provided to the I/O board 40 from a first temperature sensor 43 for controlling an inverter that detects, for example, the temperature inside the refrigerator. In addition, 7 is an inverter board 45 and an inverter.
This is an inverter power supply composed of an IC 46, and the frequency-controlled power from this inverter power supply 7 is output to a compressor operation circuit 47 equipped with three-phase first and second rotary compressors (hereinafter referred to as compressors) 5 and 6. be done. Furthermore, 48 is an operation circuit for operating the inverter, and the operation of the first and second compressors 5 and 6 individually and simultaneously is controlled by the operation of this operation circuit. Further, 32 is a commercial operation control board, 50 is a commercial operation operation circuit, and 31
is a temperature alarm board equipped with a timer circuit 31T, and the commercial operation control board 32 and the temperature alarm board 31 are equipped with a second temperature sensor 52 for commercial operation that senses the temperature inside the refrigerator, and a third temperature sensor for switching, respectively. A sensor 53 is connected.
上記運転制御装置のブロツク図における動作に
ついて説明する。今、第１温度センサ４３からの
信号に基づいてＩ／Ｏ基板４０が動作して信号処
理を行ない、コントロール基板４１へ信号出力し
てこのコントロール基板にてデータ処理されて再
びＩ／Ｏ基板４０へ出力され、このＩ／Ｏ基板か
ら周波数信号がインバータ電源７へ出力され、イ
ンバータ電源７から第１又は第２コンプ５又は６
へ周波数制御された電力が供給され、冷凍サイク
ルは運転されて冷却運転が行なわれる。又、コン
トロール基板４１から表示部４２へデータ処理さ
れた温度信号等が与えられ、表示部４２にて庫内
温度等が表示される。 The operation in the block diagram of the above operation control device will be explained. Now, the I/O board 40 operates based on the signal from the first temperature sensor 43, processes the signal, outputs the signal to the control board 41, processes the data on this control board, and returns the I/O board 40 to the I/O board 40. The frequency signal is output from this I/O board to the inverter power supply 7, and from the inverter power supply 7 to the first or second compressor 5 or 6.
Frequency-controlled power is supplied to the refrigeration cycle, and the refrigeration cycle is operated to perform cooling operation. Further, data-processed temperature signals and the like are given from the control board 41 to the display unit 42, and the internal temperature and the like are displayed on the display unit 42.
上記のように、第１、第２コンプ５，６がイン
バータ運転を行なつているとき、例えばインバー
タIC４６が故障してインバータICを構成するパ
ワートランジスタに過電流が流れたときには、イ
ンバータIC４６はこのパワートランジスタをオ
フさせてインバータ基板４５へ故障信号を出力す
る。そして、インバータ基板４５はインバータ
IC４６への周波数信号の出力を停止し、コント
ロール基板４１へ故障信号を出力する。ここで、
コントロール基板４１は所定の間隔例えば10分に
７回の割合即ち略86秒毎に前記故障信号の有無を
検出し、７回繰り返して故障信号を検出したとき
には、コントロール基板３２は動作して商用運転
への切換え信号を出力する。そして、この信号に
基づいてＩ／Ｏ基板４０は動作し、それによりイ
ンバータ運転用操作回路４８はインバータ運転停
止側へ切換わる。又、Ｉ／Ｏ基板４０の動作によ
り商用運転コントロール基板３２は通電され、第
２センサ５２からの温度信号に基づいて動作を開
始する。この商用運転コントロール基板３２の動
作により、商用運転用操作回路５０は動作して第
１、第２コンプ５，６へ３相交流電源から直接商
用電力が供給される。 As mentioned above, when the first and second compressors 5 and 6 are performing inverter operation, for example, if the inverter IC 46 fails and an overcurrent flows through the power transistors that constitute the inverter IC, the inverter IC 46 The power transistor is turned off and a failure signal is output to the inverter board 45. The inverter board 45 is an inverter.
It stops outputting the frequency signal to the IC 46 and outputs a failure signal to the control board 41. here,
The control board 41 detects the presence or absence of the failure signal at a predetermined interval, for example, at a rate of 7 times every 10 minutes, that is, approximately every 86 seconds, and when the failure signal is detected repeatedly 7 times, the control board 32 is activated and the commercial operation begins. Outputs a switching signal to Then, the I/O board 40 operates based on this signal, thereby switching the inverter operation operation circuit 48 to the inverter operation stop side. Furthermore, the commercial operation control board 32 is energized by the operation of the I/O board 40 and starts operating based on the temperature signal from the second sensor 52. This operation of the commercial operation control board 32 causes the commercial operation operation circuit 50 to operate, and commercial power is directly supplied to the first and second compressors 5 and 6 from the three-phase AC power source.
第１、第２コンプ５，６へ商用電力が供給され
始めると同時に、第２温度センサ５２から庫内の
温度信号を入力していた商用運転コントロール基
板３２は前記温度信号に基づいて、第１、第２コ
ンプ５，６への商用電力の供給を制御する信号を
出力する。そしてこの信号により商用運転用操作
回路５０は動作して第１、第２コンプ５，６への
通電をオンオフさせ、これら第１、第２コンプ
５，６の運転、停止即ち商用運転により庫内温度
は略一定に保たれる。尚、このとき、第１、第２
コンプ５，６のインバータ運転時よりは庫内温度
の変化は大きくなる。 At the same time that commercial power begins to be supplied to the first and second compressors 5 and 6, the commercial operation control board 32, which had been inputting the temperature signal inside the refrigerator from the second temperature sensor 52, , outputs a signal for controlling the supply of commercial power to the second compressors 5 and 6. In response to this signal, the commercial operation operation circuit 50 operates to turn on and off the power supply to the first and second comps 5 and 6, and operate and stop these first and second comps 5 and 6, that is, the commercial operation allows the inside of the refrigerator to operate. The temperature is kept approximately constant. In addition, at this time, the first and second
The change in temperature inside the refrigerator is greater than when the compressors 5 and 6 are operated by inverters.
さらに、インバータ運転が行なわれていると
き、例えば第１温度センサ４３の断線等の故障、
Ｉ／Ｏ基板４０等の不良即ちパターン切れ又は断
線、夫々の基板間の信号線の断線等が発生した場
合には、インバータ電源７へ誤つた周波数信号が
与えられる。このため、インバータ電源７から庫
内温度とは無関係な周波数の電力が第１、第２コ
ンプ５，６へ与えられ、これらコンプの運転能力
による冷凍サイクルの冷却能力が庫内温度と無関
係なため、庫内温度は設定温度より上昇又は低下
する。そして、その庫内温度を第３温度センサ５
３は感知して温度信号を温度警報基板３１へ与え
ており、例えば設定温度に対して予じめ設けられ
た上限温度又は下限温度を庫内温度が越え、上限
温度域又は下限温度域に入りその状態が設定時間
続いた場合には温度警報基板３１のタイマ回路３
０Ｔは信号を出力して、商用運転コントロール基
板３２は通電され、第２センサ５２からの温度信
号に基づいて動作開始する。そして上記、インバ
ータIC４６の故障時と同様に第１、第２コンプ
５，６の商用運転が開始される。 Furthermore, when inverter operation is performed, a failure such as a disconnection of the first temperature sensor 43, for example,
If the I/O board 40 or the like is defective, such as a broken pattern or disconnection, or a break in the signal line between the respective boards, an erroneous frequency signal is given to the inverter power supply 7. For this reason, power with a frequency unrelated to the temperature inside the refrigerator is supplied from the inverter power supply 7 to the first and second comps 5 and 6, and the cooling capacity of the refrigeration cycle due to the operating capacity of these compressors is unrelated to the temperature inside the refrigerator. , the internal temperature rises or falls below the set temperature. Then, the temperature inside the refrigerator is measured by a third temperature sensor 5.
3 senses and gives a temperature signal to the temperature alarm board 31. For example, if the temperature inside the refrigerator exceeds the upper limit temperature or lower limit temperature set in advance for the set temperature and enters the upper limit temperature range or the lower limit temperature range. If this condition continues for the set time, the timer circuit 3 of the temperature alarm board 31
0T outputs a signal, the commercial operation control board 32 is energized, and starts operating based on the temperature signal from the second sensor 52. Then, the commercial operation of the first and second compressors 5 and 6 is started in the same manner as when the inverter IC 46 fails.
第３図は本発明にかかる給電制御装置の概略回
路図を示し、１は３相商用電源、２ａ，２ｂ，２
ｃは夫々第１、第２、第３電源ラインで、各電源
ライン２ａ，２ｂ，２ｃはコンセント３にて３相
商用電源１に接続されている。又、４は逆相防止
リレーで、この逆相防止リレー４は第１、第２、
第３電源ライン２ａ，２ｂ，２ｃに接続されてい
る。さらに、第１、第２コンプ５，６には第１、
第２、第３電源ライン２ａ，２ｂ，２ｃから電力
が供給される。又、７は上記の如く第１、第２コ
ンプ５，６へ周波数制御された電力を供給するイ
ンバータ電源で、このインバータ電源７と各コン
プ５，６との間には第１、第２リレー８，９の第
１、第２リレースイツチ８Ｓ，９Ｓが設けられ、
さらに、第１、第２、第３電源ライン２ａ，２
ｂ，２ｃと第１、第２コンプ５，６とは第３、第
４リレー１１，１２の第３、第４リレースイツチ
１１Ｓ，１２Ｓを介して接続されている。又、第
２電源ライン２ｂの逆相防止リレー４より制御回
路側には逆相防止リレー４の給電遮断スイツチ４
Ｓが設けられている。 FIG. 3 shows a schematic circuit diagram of the power supply control device according to the present invention, in which 1 is a three-phase commercial power supply, 2a, 2b, 2
Reference characters c denote first, second, and third power lines, respectively, and each power line 2a, 2b, and 2c is connected to a three-phase commercial power source 1 through an outlet 3. Further, 4 is a reverse phase prevention relay, and this reverse phase prevention relay 4 has the first, second,
It is connected to third power supply lines 2a, 2b, and 2c. Furthermore, the first and second comps 5 and 6 include a first
Power is supplied from second and third power lines 2a, 2b, and 2c. Further, 7 is an inverter power supply that supplies frequency-controlled power to the first and second comps 5 and 6 as described above, and between this inverter power supply 7 and each of the comps 5 and 6, there are first and second relays. 8 and 9 first and second relay switches 8S and 9S are provided,
Furthermore, first, second, and third power supply lines 2a, 2
b, 2c and the first and second compressors 5, 6 are connected via third and fourth relay switches 11S and 12S of third and fourth relays 11 and 12, respectively. Further, a power supply cutoff switch 4 of the reverse phase prevention relay 4 is connected to the control circuit side of the second power supply line 2b from the reverse phase prevention relay 4.
S is provided.
又、１５はコントローラ、１６は手動の商用運
転切換スイツチで、１６ａはインバータ運転側の
接点（以下第１接点という）、１６ｂは商用運転
側の接点（以下第２接点という）である。そし
て、第１接点１６ａと第２接点１６ｂとの間には
常開な第５、第６、第７リレースイツチ２１Ｓ，
２２S1，２３S1が夫々並列に接続され、さらに２
２S2は常閉な第６リレースイツチで、この常閉第
６リレースイツチ２２S2はコントローラ１５の第
１コンプ通電スイツチ２６を介して第１リレー８
に接続されると共に、コントローラ１５の第２コ
ンプ通電スイツチ２７を介して第２リレー９に接
続されている。 Further, 15 is a controller, 16 is a manual commercial operation changeover switch, 16a is a contact on the inverter operation side (hereinafter referred to as a first contact), and 16b is a contact on the commercial operation side (hereinafter referred to as a second contact). Between the first contact 16a and the second contact 16b are fifth, sixth, and seventh relay switches 21S, which are normally open.
22S 1 and 23S 1 are connected in parallel, and 2
2S 2 is a normally closed sixth relay switch.
It is also connected to the second relay 9 via the second compressor energization switch 27 of the controller 15.
前記第２接点１６ｂは第８リレースイツチ２４
S1及び、常閉な商用運転コントロールスイツチ１
５Ｓを介して第３リレー１１又は第４リレー１２
に接続されている。又、２３，２３S2は夫々第８
リレー及び常開な第８リレースイツチ、２１は第
１リレー、２８はコントローラ１５の商用運転切
換スイツチ、３０は第９リレーで温度警報スイツ
チ３１Ｓを介して第１接点１６ａに接続されてい
る。さらに、２４は第８リレー、３０Ｓは常開な
第９リレースイツチ、２４S2は常開な第３リレー
スイツチである。又、２２は第２リレー、３１は
温度警報基板、３２は商用運転コントロール基板
である。又、４３，５２及び５３は夫々庫内温度
を感知して温度信号を出力する第１、第２、及び
第３温度センサである。 The second contact 16b is an eighth relay switch 24
S 1 and normally closed commercial operation control switch 1
Third relay 11 or fourth relay 12 via 5S
It is connected to the. Also, 23 and 23S 2 are respectively the 8th
A relay and a normally open eighth relay switch 21, a first relay, 28 a commercial operation selector switch of the controller 15, and a ninth relay 30 are connected to the first contact 16a via a temperature alarm switch 31S. Furthermore, 24 is an eighth relay, 30S is a normally open ninth relay switch, and 24S2 is a normally open third relay switch. Further, 22 is a second relay, 31 is a temperature alarm board, and 32 is a commercial operation control board. Moreover, 43, 52, and 53 are first, second, and third temperature sensors that respectively sense the temperature inside the refrigerator and output a temperature signal.
以下、上記回路の動作について説明する。今、
冷凍装置の第１、第２、第３電源ライン２ａ，２
ｂ，２ｃをコンセント３に接続したとき、３相商
用電源１の相順と第１、第２、第３電源ライン２
ａ，２ｂ，２ｃの相順、即ち第１、第２コンプ
５，６への供給電力の相順とが等しい場合には、
逆相防止リレー４は相順が等しいことを検知し
て、給電遮断スイツチ４Ｓをオンに保つ。又、３
相商用電源１の相順と第１、第２、第３電源ライ
ン２ａ，２ｂ，２ｃの相順とが異なつている場合
には、逆相防止リレー４は相順が異なつているこ
とを検知して動作し、給電遮断スイツチ４Ｓはオ
フする。 The operation of the above circuit will be explained below. now,
First, second, and third power lines 2a, 2 of the refrigeration equipment
b, 2c are connected to the outlet 3, the phase order of the three-phase commercial power supply 1 and the first, second, and third power supply lines 2
When the phase order of a, 2b, and 2c, that is, the phase order of the power supplied to the first and second compressors 5 and 6, is the same,
The reverse phase prevention relay 4 detects that the phase order is equal and keeps the power supply cutoff switch 4S on. Also, 3
If the phase order of the phase commercial power supply 1 is different from the phase order of the first, second, and third power supply lines 2a, 2b, and 2c, the reverse phase prevention relay 4 detects that the phase order is different. The power supply cutoff switch 4S is turned off.
給電遮断スイツチ４Ｓのオフにより、第１、第
２リレー８，９、及び第３、第４リレー１１，１
２は他のスイツチのオンオフに関係なく非通電に
なり、第１、第２リレースイツチ８Ｓ，９Ｓ、及
び、第３、第４リレースイツチ１１Ｓ，１２Ｓは
共にオフを継続する。このため、第１、第２、第
３電源ライン２ａ，２ｂ，２ｃを商用電源１に接
続したにもかかわらず、第１、第２コンプ５，６
は停止を継続する。そして、冷凍装置の管理者が
冷凍装置の停止に気付き、第１、第２、第３電源
ライン２ａ，２ｂ，２ｃのうち２電源ラインのコ
ンセント３での接続を切換えることにより、３相
商用電源１と第１、第２、第３電源ライン２ａ，
２ｂ，２ｃの相順とは等しくなる。このため、逆
相防止リレー４は夫々の相順が等しいことを検知
して、給電遮断スイツチ４Ｓをオンに切換える。 When the power supply cutoff switch 4S is turned off, the first and second relays 8 and 9, and the third and fourth relays 11 and 1 are turned off.
2 becomes de-energized regardless of whether other switches are on or off, and both the first and second relay switches 8S, 9S and the third and fourth relay switches 11S, 12S continue to be off. Therefore, even though the first, second, and third power supply lines 2a, 2b, and 2c are connected to the commercial power supply 1, the first and second compressors 5 and 6
continues to stop. Then, the administrator of the refrigeration equipment notices that the refrigeration equipment has stopped, and switches the connection of two of the first, second, and third power lines 2a, 2b, and 2c at the outlet 3 to connect the three-phase commercial power supply. 1 and the first, second, and third power supply lines 2a,
The phase orders of 2b and 2c are equal. Therefore, the reverse phase prevention relay 4 detects that the respective phase orders are equal and turns on the power supply cutoff switch 4S.
給電遮断スイツチ４Ｓがオンのとき、コントロ
ーラ１５の例えば第１コンプ通電スイツチ２６が
オンした場合には、給電遮断スイツチ４Ｓ及び商
用運転切換スイツチ１６の第１接点１６ａ、常閉
第６リレースイツチ２２S2、及び第１コンプ通電
スイツチ２６を介して第１リレー１１は通電さ
れ、第１リレースイツチ８Ｓはオンして第１コン
プ５へはインバータ電源７から周波数制御された
電力が供給される。このため、第１コンプ５へは
庫内温度に基づいて周波数制御された電力が供給
され庫内温度は略一定に保たれる。又、庫内温度
が高い傾向にあるときには第２コンプ通電スイツ
チ２７はオンして上記と同様に第２コンプ６も運
転を開始する。又、第１、第２コンプ５，６のう
ち１台のコンプの運転が行われるときには夫々の
コンプが交互に運転される。 When the power supply cutoff switch 4S is on, if, for example, the first compressor energization switch 26 of the controller 15 is turned on, the power supply cutoff switch 4S, the first contact 16a of the commercial operation changeover switch 16, and the normally closed sixth relay switch 22S 2 The first relay 11 is energized via the first compressor energizing switch 26, the first relay switch 8S is turned on, and frequency-controlled power is supplied from the inverter power supply 7 to the first compressor 5. Therefore, frequency-controlled power is supplied to the first compressor 5 based on the temperature inside the refrigerator, and the temperature inside the refrigerator is kept substantially constant. Further, when the temperature inside the refrigerator tends to be high, the second compressor energizing switch 27 is turned on and the second compressor 6 also starts operating in the same manner as described above. Further, when one of the first and second compressors 5 and 6 is operated, each compressor is operated alternately.
上記の如くインバータ電源７からの給電により
第１、第２コンプ５，６がインバータ運転を行な
つているとき、例えばインバータ電源７を構成し
ているパワートランジスタに通電流が発生した場
合には、インバータ電源７からコントローラ１５
へ故障信号を出力する。この故障信号に基づいて
コントローラ１５の商用運転切換スイツチ２８は
オンし、第５リレー２１は通電され、常開リレー
スイツチ２１Ｓはオンする。このため、商用運転
コントロール基板３２は通電され、さらに第６リ
レー２２に通電され、常閉第６リレースイツチ２
２S2はオフして第１、第２リレー１１，１２は非
通電になり、第１、第２常開スイツチ８Ｓ，９Ｓ
は共にオフし、インバータ電源７から第１、第２
コンプ５，６への給電は停止する。又、常閉第２
リレースイツチ２２S1はオンする。又、第９リレ
ー３０は通電され、第９リレースイツチ３０Ｓは
オンして第８リレー２４は通電される。 When the first and second compressors 5 and 6 are performing inverter operation by being supplied with power from the inverter power supply 7 as described above, for example, if current occurs in the power transistors that constitute the inverter power supply 7, From the inverter power supply 7 to the controller 15
Outputs a fault signal to. Based on this failure signal, the commercial operation selector switch 28 of the controller 15 is turned on, the fifth relay 21 is energized, and the normally open relay switch 21S is turned on. Therefore, the commercial operation control board 32 is energized, the sixth relay 22 is energized, and the normally closed sixth relay switch 2 is energized.
2S 2 is turned off, the first and second relays 11 and 12 are de-energized, and the first and second normally open switches 8S and 9S are turned off.
are both turned off, and the first and second
Power supply to the compressors 5 and 6 is stopped. Also, the normally closed second
Relay switch 22S1 is turned on. Further, the ninth relay 30 is energized, the ninth relay switch 30S is turned on, and the eighth relay 24 is energized.
第８リレー２４の通電により第４リレースイツ
チ２４S1，２４S2はオンし、第３、第４リレー１
１，１２は共に通電され、第３、第４常開スイツ
チ１１Ｓ，１２Ｓは共にオンする。これらのスイ
ツチのオンにより第１、第２コンプ５，６には３
相交流電源１から交流電力が供給され、第１、第
２コンプ５，６は商用運転を開始する。尚、この
ときブザー、又はランプ等を動作させ、商用運転
が開始されたことを報知しても良い。又、商用運
転コントロール基板３２は通電されており、第２
温度センサ５２からの温度信号を入力して、この
温度信号に基づいて商用運転コントロールスイツ
チ１５Ｓはオンオフし、第３、第４リレー１１，
１２への通電は制御される。このため、第３、第
４常閉スイツチ１１Ｓ，１２Ｓはオンオフし、第
１、第２コンプ５，６の商用運転に伴う運転及び
停止によりインバータ運転時よりは庫内温度の変
動幅は大きくなるが、庫内の温度は略設定温度に
保たれる。 When the eighth relay 24 is energized, the fourth relay switches 24S 1 and 24S 2 are turned on, and the third and fourth relays 1
1 and 12 are both energized, and the third and fourth normally open switches 11S and 12S are both turned on. By turning on these switches, the first and second compressors 5 and 6 receive 3
AC power is supplied from the phase AC power supply 1, and the first and second compressors 5 and 6 start commercial operation. Incidentally, at this time, a buzzer, a lamp, or the like may be operated to notify that commercial operation has started. Further, the commercial operation control board 32 is energized, and the second
The temperature signal from the temperature sensor 52 is input, and the commercial operation control switch 15S is turned on and off based on this temperature signal, and the third and fourth relays 11,
12 is controlled. For this reason, the third and fourth normally closed switches 11S and 12S are turned on and off, and due to the operation and stop of the first and second compressors 5 and 6 due to commercial operation, the fluctuation range of the temperature inside the refrigerator becomes larger than when the inverter is operated. However, the temperature inside the refrigerator is maintained at approximately the set temperature.
又、例えばコントローラ１５に庫内の温度信号
を出力する第１温度センサ４３に断線等の故障が
発生した場合には、コントローラ１５による周波
数制御が不正確になり、例えば庫内温度が上昇傾
向にあるにもかかわらず、コントローラ１５から
の周波数信号に基づくインバータ電源７からの電
力の周波数が低い場合には庫内温度は上昇する。
この庫内温度を温度警報基板３１に接続された第
３温度センサ５３は感知しており、庫内温度が設
定温度より例えば10℃以上高い上限温度域になつ
たときには、温度警報基板３１に設けられたタイ
マ回路３１Ｔは動作を開始する。そして、庫内温
度が前記上限温度域内の状態が例えば２時間断続
したときには、タイマ回路３１Ｔはカウントアツ
プして、このカウントアツプに伴ない温度警報基
板３１は温度警報スイツチ３１Ｓをオンさせる。
前記スイツチ３１Ｓのオンにより、第９リレー３
０は通電され、第９リレースイツチ３０Ｓはオン
し、以下、商用運転切換スイツチ２８のオンによ
りインバータ運転から商用運転に移るときと同様
に、冷凍装置はインバータ運転から商用運転へ移
る。 Further, for example, if a failure such as a disconnection occurs in the first temperature sensor 43 that outputs a temperature signal inside the refrigerator to the controller 15, the frequency control by the controller 15 will become inaccurate, and for example, the temperature inside the refrigerator will tend to rise. Despite this, if the frequency of the power from the inverter power supply 7 based on the frequency signal from the controller 15 is low, the temperature inside the refrigerator will rise.
The third temperature sensor 53 connected to the temperature alarm board 31 detects this temperature inside the refrigerator, and when the temperature inside the refrigerator reaches the upper limit temperature range, which is higher than the set temperature by, for example, 10°C or more, a third temperature sensor 53 connected to the temperature alarm board 31 detects the temperature inside the refrigerator. The timer circuit 31T starts operating. When the internal temperature remains within the upper limit temperature range for, for example, two hours intermittently, the timer circuit 31T counts up, and as the count increases, the temperature alarm board 31 turns on the temperature alarm switch 31S.
By turning on the switch 31S, the ninth relay 3
0 is energized, the ninth relay switch 30S is turned on, and the refrigeration system is subsequently shifted from inverter operation to commercial operation in the same manner as when switching from inverter operation to commercial operation by turning on commercial operation changeover switch 28.
又、コントローラ１５による周波数制御が不正
確になり、庫内温度が低下傾向になり、庫内温度
が設定温度より例えば５℃以上低い下限温度域に
なり、所定時間経過したときも温度警報基板３１
は温度警報スイツチ３１Ｓをオンさせ、第１、第
２コンプ５，６の運転をインバータ運転から商用
運転へ移行させる。 Furthermore, if the frequency control by the controller 15 becomes inaccurate, the temperature inside the refrigerator tends to decrease, and the temperature inside the refrigerator falls into the lower limit temperature range, for example, 5 degrees Celsius or more lower than the set temperature, and a predetermined period of time has elapsed, the temperature alarm board 31 is activated.
turns on the temperature alarm switch 31S and shifts the operation of the first and second compressors 5 and 6 from inverter operation to commercial operation.
さらに、冷凍装置を設置して初めて電源を投入
したとき、又は冷凍装置が設けられた例えばプレ
ハブ式低温庫の庫内掃除を前記冷凍装置の運転を
停止させて行なつた後の電源投入時、即ちプルダ
ウン時インバータ運転が開始される。しかし乍
ら、このとき庫内温度は高く上限温度域内にあ
り、この温度を感知している第３温度センサ５３
からの温度信号により温度警報基板３１のタイマ
回路３１Ｔは動作を開始する。このとき、タイマ
回路３１Ｔが動作を開始してから所定時間経過す
る前に、上記インバータ運転により、庫内温度が
上限温度域より低くなつた場合には、タイマ回路
３１Ｔは動作を停止して温度警報スイツチ３１Ｓ
はオフを断続し、インバータ運転が断続され庫内
温度は次第に設定温度に近づく。このため、電源
投入時、さらには貯蔵品の搬入又は搬出時等、庫
内温度が一時的に上限温度を超えても直ちにイン
バータ運転から商用運転に切換わることは回避さ
れる。 Furthermore, when the power is turned on for the first time after installing the refrigeration equipment, or when the power is turned on after the operation of the refrigeration equipment has been stopped and the interior of a prefabricated low-temperature refrigerator equipped with the refrigeration equipment has been cleaned, That is, inverter operation is started during pulldown. However, at this time, the temperature inside the refrigerator is high and within the upper limit temperature range, and the third temperature sensor 53 detects this temperature.
The timer circuit 31T of the temperature alarm board 31 starts operating according to the temperature signal from the temperature alarm board 31. At this time, if the temperature inside the refrigerator falls below the upper limit temperature range due to the inverter operation before a predetermined period of time has elapsed after the timer circuit 31T starts operating, the timer circuit 31T stops operating and Alarm switch 31S
is turned off intermittently, inverter operation is intermittent, and the temperature inside the refrigerator gradually approaches the set temperature. Therefore, even if the temperature inside the refrigerator temporarily exceeds the upper limit temperature, such as when the power is turned on, or when storing items are brought in or taken out, an immediate switch from inverter operation to commercial operation is avoided.
従つて、インバータ電源７から周波数制御され
た電力が第１又は第２コンブ５又は６に供給され
インバータ運転が行なわれているとき、例えばイ
ンバータIC４６のパワートランジスタ故障のた
めの過電流発生時、又は第１温度センサ４３の断
線又はシヨート、コントローラ１５の各基板又は
インバータ基板４５のパターン切れ又は断線、又
は前記各基板間の信号断線等により、庫内温度と
無関係な周波数の電力がインバータ電源７から第
１、第２コンブ５，６へ供給され庫内温度が予じ
め設定された上限又は下限温度域になつたとき、
コントローラ１５又は温度警報基板３１の動作に
よりインバータ電源７からの電力供給は停止する
と略同時に、商用電力が供給され、第１、第２コ
ンプ５，６は第２温度センサ５２からの温度信号
に基づく商用運転コントロール基板３２の商用運
転コントロールスイツチ２７のオンオフにより運
転制御され、この結果、インバータ電源７の故
障、又はインバータ運転に基づく庫内温度制御が
例えば第１温度センサ４３の故障等のため不能に
なつた場合には、前記インバータ運転から商用運
転に切換わり、第２温度センサ５２の検出温度に
基づいて第１、第２コンプ５，６は運転制御され
て、庫内温度は略設定温度に保たれるため、貯蔵
物の損傷を回避することができる。 Therefore, when frequency-controlled power is supplied from the inverter power supply 7 to the first or second combination unit 5 or 6 and inverter operation is performed, for example, when an overcurrent occurs due to a power transistor failure of the inverter IC 46, or Due to a disconnection or short circuit of the first temperature sensor 43, a disconnection or disconnection of the pattern on each board of the controller 15 or the inverter board 45, or a signal disconnection between the boards, power at a frequency unrelated to the internal temperature of the refrigerator is discharged from the inverter power supply 7. When the temperature inside the refrigerator reaches the preset upper or lower limit temperature range after being supplied to the first and second kelp 5, 6,
Almost at the same time when the power supply from the inverter power supply 7 is stopped due to the operation of the controller 15 or the temperature alarm board 31, commercial power is supplied, and the first and second compressors 5 and 6 are operated based on the temperature signal from the second temperature sensor 52. The operation is controlled by turning on and off the commercial operation control switch 27 of the commercial operation control board 32, and as a result, if the inverter power supply 7 malfunctions or the internal temperature control based on the inverter operation becomes impossible, for example, due to a malfunction of the first temperature sensor 43, etc. If the temperature is too high, the inverter operation is switched to commercial operation, and the operation of the first and second compressors 5 and 6 is controlled based on the temperature detected by the second temperature sensor 52, so that the temperature inside the refrigerator is approximately at the set temperature. Therefore, damage to stored items can be avoided.
尚、本発明は上記実施例に限定されるものでは
なく、例えば１台コンプ又は３台以上のコンプを
備えた冷凍装置においても、インバータ電源又は
温度センサ等の故障等が発生したときに自動的に
インバータ運転から商用運転に切換えることによ
り上記実施例と同様な作用効果を得ることができ
る。 Note that the present invention is not limited to the above-mentioned embodiments. For example, even in a refrigeration system equipped with one compressor or three or more compressors, when a failure of the inverter power supply or temperature sensor, etc. occurs, the automatic By switching from inverter operation to commercial operation at the same time, the same effects as in the above embodiment can be obtained.
(ト) 発明の効果
本発明は上記実施例にて説明された冷凍装置の
給電制御装置であるから、インバータ運転時、イ
ンバータ電源あるいはコントローラの故障ばかり
でなく、イバータ運転用の温度センサの不良等に
より温度制御が行なわれなくなり庫内温度が上限
温度域又は下限温度域になり、その状態が所定時
間断続した場合等には、切換用の温度センサの検
出温度に基づいてインバータ電源と商用電源とを
切換える切換スイツチが確実に動作して、所謂フ
エールセーフが行なわれ自動的にコンプレツサへ
商用電源から電力が供給されるようになり、商用
運転に切換わり商用運転用の温度センサの検出温
度に基づいて温度制御が行なわれるため、前記故
障が発生しても庫内温度は略設定温度に保たれ、
この結果、貯蔵物の損傷を回避することができ
る。(G) Effects of the Invention Since the present invention is a power supply control device for a refrigeration system as explained in the above embodiment, it is possible to avoid not only a failure of the inverter power supply or controller but also a failure of the temperature sensor for inverter operation during inverter operation. When temperature control is no longer performed and the temperature inside the refrigerator reaches the upper limit temperature range or lower limit temperature range, and this state continues intermittently for a predetermined period of time, the inverter power supply and commercial power supply are switched off based on the temperature detected by the switching temperature sensor. The changeover switch operates reliably, a so-called fail-safe is performed, and power is automatically supplied to the compressor from the commercial power supply, and the compressor switches to commercial operation based on the temperature detected by the temperature sensor for commercial operation. Since temperature control is carried out by
As a result, damage to stored items can be avoided.
第１図乃至第３図は本発明の一実施例を示し、
第１図は給電制御装置の概略ブロツク図、第２図
はコンプレツクサの運転状態を示したフローチヤ
ート図、第３図は給電制御装置の概略回路図であ
る。
１……３相商用電源、５，６……第１、第２コ
ンプレツサ、７……インバータ電源、８，９，１
１，１２……第１〜第４リレー、１５……コント
ローラ、３１Ｔ……タイマ回路、４３……第１温
度センサ、５２……第２温度センサ、５３……第
３温度センサ。
1 to 3 show an embodiment of the present invention,
FIG. 1 is a schematic block diagram of the power supply control device, FIG. 2 is a flowchart showing the operating state of the compressor, and FIG. 3 is a schematic circuit diagram of the power supply control device. 1... 3-phase commercial power supply, 5, 6... 1st and 2nd compressor, 7... Inverter power supply, 8, 9, 1
1, 12...First to fourth relays, 15...Controller, 31T...Timer circuit, 43...First temperature sensor, 52...Second temperature sensor, 53...Third temperature sensor.
Claims (1)
力可変形コンプレツサへ周波数制御された電力を
供給するインバータ電源と、庫内に設けられたイ
ンバータ制御用の温度センサからの信号を入力し
て前記インバータ電源へ周波数信号を出力するコ
ントローラと、前記インバータ電源から前記コン
プレツサへの通電路と前記商用電源から前記コン
プレツサへの通電路とを選択的に切換える切換ス
イツチと、庫内に設けられた商用運転用の温度セ
ンサからの信号を入力して前記商用電源から前記
コンプレツサへの通電を制御するコントローラと
を備えた冷凍装置の給電制御装置において、前記
インバータ電源から前記コンプレツサへ、電力が
給電されているとき、庫内温度が予じめ設定され
た上限温度域又は下限温度域になつたことを検出
する切換用の温度センサと、この切換用の温度セ
ンサによる庫内温度の上限温度域又は下限温度域
の検出が所定時間継続したとき信号を出力するタ
イマ回路とを備え、このタイマ回路からの信号に
基づき前記切換スイツチを商用電源側に切換え、
商用運転用の温度センサの検出温度に基づいて庫
内温度制御を行なわせるようにしたことを特徴と
する冷凍装置の給電制御装置。1. An inverter power supply that is connected to a commercial power supply and supplies frequency-controlled power to a variable capacity compressor that constitutes a refrigeration system, and a signal from a temperature sensor for controlling the inverter installed in the refrigerator to be input to the inverter. a controller that outputs a frequency signal to a power source; a changeover switch that selectively switches between a current-carrying path from the inverter power source to the compressor and a current-carrying path from the commercial power source to the compressor; and a switch for commercial operation provided in the refrigerator. In a power supply control device for a refrigeration equipment, the power supply control device includes a controller that inputs a signal from a temperature sensor to control power supply from the commercial power supply to the compressor, when power is being supplied from the inverter power supply to the compressor. , a switching temperature sensor that detects when the internal temperature reaches a preset upper or lower temperature range; and a switching temperature sensor that detects the upper or lower temperature range of the internal temperature. and a timer circuit that outputs a signal when the detection of
1. A power supply control device for a refrigeration device, characterized in that the temperature inside the refrigerator is controlled based on the temperature detected by a temperature sensor for commercial operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17062586A JPS6329175A (en) | 1986-07-18 | 1986-07-18 | Feed controller for refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17062586A JPS6329175A (en) | 1986-07-18 | 1986-07-18 | Feed controller for refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6329175A JPS6329175A (en) | 1988-02-06 |
| JPH0544585B2 true JPH0544585B2 (en) | 1993-07-06 |
Family
ID=15908343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17062586A Granted JPS6329175A (en) | 1986-07-18 | 1986-07-18 | Feed controller for refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6329175A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003083621A (en) * | 2001-09-12 | 2003-03-19 | Mitsubishi Heavy Ind Ltd | Marine refrigerating unit |
| RU2652291C2 (en) | 2012-09-05 | 2018-04-25 | Форд Глобал Технолоджис, ЛЛК | Method for producing raised seam |
| CN104603473B (en) | 2012-09-05 | 2018-07-06 | 福特全球技术公司 | It is used to form the method for convex seam |
| JP7186662B2 (en) * | 2019-04-26 | 2022-12-09 | 三菱電機エンジニアリング株式会社 | Showcase |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60223966A (en) * | 1984-04-20 | 1985-11-08 | 三菱電機株式会社 | Refrigerator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57144326U (en) * | 1981-03-06 | 1982-09-10 |
-
1986
- 1986-07-18 JP JP17062586A patent/JPS6329175A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60223966A (en) * | 1984-04-20 | 1985-11-08 | 三菱電機株式会社 | Refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6329175A (en) | 1988-02-06 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |