JPH01118176U - - Google Patents
Info
- Publication number
- JPH01118176U JPH01118176U JP489789U JP489789U JPH01118176U JP H01118176 U JPH01118176 U JP H01118176U JP 489789 U JP489789 U JP 489789U JP 489789 U JP489789 U JP 489789U JP H01118176 U JPH01118176 U JP H01118176U
- Authority
- JP
- Japan
- Prior art keywords
- frequency power
- power supply
- variable voltage
- voltage frequency
- cooling system
- 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.)
- Pending
Links
- 238000001816 cooling Methods 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 230000006698 induction Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Description
図は本考案の一実施例を示すブロツク図である
。
１…商用周波数電源、２…可変電圧周波数電源
装置、４１，４２…第１のスイツチ群、５１，５
２…第２のスイツチ群、６１，６２…電動機、７
１，７２…体質型圧縮機、８…冷却機器、１１…
制御装置部。
The figure is a block diagram showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Commercial frequency power supply, 2... Variable voltage frequency power supply device, 4 1 , 4 2 ... First switch group, 5 1 , 5
2 ...Second switch group, 6 1 , 6 2 ...Electric motor, 7
1 , 7 2 ... Constitution type compressor, 8... Cooling equipment, 11...
Control device section.
Claims (1)
機で駆動される各体積型圧縮機をを備えた冷却シ
ステムにおいて、 商用周波数電源およびこの商用周波数電源に接
続された可変電圧周波数電源装置と、 前記各電動機と商用周波数電源との間にそれぞ
れ挿入され前記可変電圧周波数電源装置の出力周
波数が商用周波数電源に同期する毎に順次閉成動
作するとともにその可変電圧周波数電源装置の出
力周波数が零に達する毎に順次開成動作する第１
のスイツチ群と、 前記各電動機と可変電圧周波数電源装置との間
にそれぞれ挿入され対応する前記第１のスイツチ
群の閉成動作に基づき開成動作しかつその開成動
作に基づいて前記可変電圧周波数電源装置の出力
周波数を零に設定する第２のスイツチ群と、 前記各圧縮機の吸入温度または圧力の設定値に
対し冷却負荷となる各圧縮機の吸入温度または圧
力との差を比較しその差に応じて前記可変電圧周
波数電源装置の出力周波数を増大または減少させ
るとともに前記第２のスイツチ群を順次閉成動作
させる制御装置部と を具備したことを特徴とする冷却システムの制
御装置。 (2) 電動機が誘導電動機または同期電動機であ
ることを特徴とする請求項１記載の冷却システム
の制御装置。[Claims for Utility Model Registration] (1) In a cooling system equipped with a volumetric compressor driven by a plurality of electric motors operating in parallel with respect to cooling equipment, a commercial frequency power source and a cooling system connected to the commercial frequency power source a variable voltage frequency power supply device inserted between each of the electric motors and the commercial frequency power source, and each time the output frequency of the variable voltage frequency power supply device is synchronized with the commercial frequency power source, the output frequency of the variable voltage frequency power supply device is sequentially closed, and the variable voltage frequency The first circuit opens sequentially each time the output frequency of the power supply reaches zero.
a group of switches inserted between each of the electric motors and the variable voltage frequency power supply, each of which opens based on the closing operation of the corresponding first switch group, and opens the variable voltage frequency power supply based on the opening operation of the corresponding first switch group. Compare the difference between the second switch group that sets the output frequency of the device to zero and the suction temperature or pressure of each compressor serving as a cooling load with respect to the set value of the suction temperature or pressure of each compressor, and calculate the difference. A control device for a cooling system, comprising: a control device section that increases or decreases the output frequency of the variable voltage frequency power supply device and sequentially closes the second switch group in accordance with the above. (2) The control device for a cooling system according to claim 1, wherein the electric motor is an induction motor or a synchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP489789U JPH01118176U (en) | 1989-01-19 | 1989-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP489789U JPH01118176U (en) | 1989-01-19 | 1989-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01118176U true JPH01118176U (en) | 1989-08-09 |
Family
ID=31207811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP489789U Pending JPH01118176U (en) | 1989-01-19 | 1989-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01118176U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5426501A (en) * | 1977-07-30 | 1979-02-28 | Kawamoto Pump Mfg | Constant pressure water feeder |
-
1989
- 1989-01-19 JP JP489789U patent/JPH01118176U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5426501A (en) * | 1977-07-30 | 1979-02-28 | Kawamoto Pump Mfg | Constant pressure water feeder |
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