JPH04350442A - Control method of air conditioner - Google Patents
Control method of air conditionerInfo
- Publication number
- JPH04350442A JPH04350442A JP3151211A JP15121191A JPH04350442A JP H04350442 A JPH04350442 A JP H04350442A JP 3151211 A JP3151211 A JP 3151211A JP 15121191 A JP15121191 A JP 15121191A JP H04350442 A JPH04350442 A JP H04350442A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- circuit
- inverter
- voltage
- output voltage
- 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
- 238000000034 method Methods 0.000 title claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 5
- 239000003507 refrigerant Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001934 delay Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/26—Problems to be solved characterised by the startup of the refrigeration cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
- Air Conditioning Control Device (AREA)
- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、空気調和機の制御方法
に関し、詳しくは圧縮機起動時の過電流遮断の防止手段
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling an air conditioner, and more particularly to means for preventing overcurrent interruption when starting a compressor.
【０００２】0002
【従来の技術】従来、圧縮機の停止直後のように吐出側
の圧力が高く冷媒回路の圧力バランスが偏った状態で電
源を投入し圧縮機を起動させると、圧縮機は負荷過大の
ためロック状態になり入力電流が増大し過電流検出器が
作動して電源を遮断し、圧力バランスが平衡に近く戻り
、かつ過電流検出器が正常に復帰するまでは圧縮機が動
作せず、その間空気調和機の冷房または暖房が停止して
室内の快適性を損なう事例が多く発生している。また、
圧縮機の起動直前に入力電流の増加に見合う分だけ電流
値を下げるように予じめ圧縮機の運転周波数を下げて起
動する方法も取られているが、この場合起動時の突入電
流が安定し運転周波数が元に戻るまでの間は圧縮機は低
能力運転を継続することになり、圧縮機が冷媒回路の圧
力バランスの偏りによりロックした場合は起動せず、圧
力バランスが回復するまで結果として冷房または暖房の
立上がりを遅らせ、室内の快適性を損なうことが避けら
れなかった。[Prior Art] Conventionally, when the power is turned on and the compressor is started when the pressure on the discharge side is high and the pressure balance in the refrigerant circuit is unbalanced, such as immediately after the compressor has stopped, the compressor locks due to excessive load. The compressor will not operate until the pressure balance returns to near equilibrium and the overcurrent detector returns to normal, during which time the air There are many cases where the air conditioner stops cooling or heating, which impairs indoor comfort. Also,
Another method of starting the compressor is to lower the operating frequency of the compressor in advance so that the current value is lowered by an amount commensurate with the increase in input current just before starting the compressor, but in this case, the inrush current at startup is stable. The compressor will continue to operate at low capacity until the operating frequency returns to normal, and if the compressor locks due to an imbalance in the pressure balance of the refrigerant circuit, it will not start and the result will be reduced until the pressure balance is restored. This inevitably delays the start-up of the air conditioner or heating and impairs indoor comfort.
【０００３】0003
【発明が解決しようとする課題】本発明は、上記従来の
問題点に鑑みなされたもので、圧縮機の起動時に冷媒回
路の圧力バランスが偏った状態でも過電流検出器が作動
せずに圧縮機を起動できるようにして、圧縮機の停止に
よる冷房または暖房能力の低下を防止し、室内の快適性
を損なわない空気調和機の制御方法を提供しようとする
ことを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional art. The purpose of the present invention is to provide a control method for an air conditioner that allows the air conditioner to be started, prevents a decrease in cooling or heating capacity due to stopping of the compressor, and does not impair indoor comfort.
【０００４】0004
【課題を解決するための手段】上記目的を達成するため
に、制御部により負荷電流値を検出し運転周波数におけ
るインバータ制御回路の出力電圧を上げ、圧縮機の運転
電流を含む全電流が過電流検出器の最大許容範囲を超え
ない範囲まで下げて起動し、圧縮機の運転が安定した後
に同インバータ制御回路の出力電圧を下げ、所定の出力
電圧に復帰するようにした。[Means for solving the problem] In order to achieve the above object, a control unit detects the load current value and increases the output voltage of the inverter control circuit at the operating frequency, so that the total current including the operating current of the compressor becomes an overcurrent. The system started by lowering the voltage to a range that did not exceed the maximum permissible range of the detector, and after the compressor operation stabilized, the output voltage of the inverter control circuit was lowered to return to the predetermined output voltage.
【０００５】[0005]
【作用】上記の構成によれば、制御部により運転周波数
におけるインバータ制御回路の出力電圧を上げ、圧縮機
の運転電流を含む全電流を過電流検出器の動作電流を超
えない範囲に下げて過電流検出器の作動を防ぎ、圧縮機
の運転が安定した後にインバータ制御回路の出力電圧を
下げて所定の出力電圧まで戻し、圧縮機の運転を継続す
ることにより冷房または暖房能力の低下を抑え、室内の
快適性を保持することができる。[Operation] According to the above configuration, the control section increases the output voltage of the inverter control circuit at the operating frequency and lowers the total current including the operating current of the compressor to a range that does not exceed the operating current of the overcurrent detector. By preventing the current detector from operating, and after the compressor operation has stabilized, the output voltage of the inverter control circuit is lowered and returned to the specified output voltage, and the compressor continues to operate, thereby suppressing the decline in cooling or heating capacity. Indoor comfort can be maintained.
【０００６】[0006]
【実施例】本発明の実施例を添付図面を参照して詳細に
説明する。図１は、本発明の構成を示すブロック図で、
交流電源１から倍電圧整流回路２によりインバータ回路
３を介して圧縮機４に電圧が供給され、設定入力回路５
または室温センサ６等からの制御信号が制御部７に入り
、制御部７から運転条件に基づく周波数変換信号をイン
バータ制御回路８に与えて、インバータ回路３を駆動し
て圧縮機４の運転を制御している。一方、交流電源１か
らインバータ回路２に接続する通電路には電流センサ９
が配設され、その出力は入力電流検出回路１０を経て制
御部７に送られている。圧縮機４の起動時に、入力電流
検出回路１０により起動時の入力電流を検出し、予じめ
制御部７に記憶された圧縮機４の運転電流を含む全電流
の限界値（過電流検出器の動作値）と比較し、起動時の
入力電流が圧縮機４のロック状態等の原因により限界値
を超えている場合には、制御部７は運転周波数に対する
インバータ制御回路８の出力電圧を一定電圧値（例えば
２Ｖ）ずつ上げていき、入力電流を下げて圧縮機４の運
転を継続し、圧縮機４の運転が安定し入力電流が所定の
解除値を下回った状態で、所定の出力電圧に戻すように
している。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of the present invention.
Voltage is supplied from the AC power supply 1 to the compressor 4 via the inverter circuit 3 by the voltage doubler rectifier circuit 2, and the setting input circuit 5
Alternatively, a control signal from the room temperature sensor 6 or the like enters the control section 7, and the control section 7 gives a frequency conversion signal based on the operating conditions to the inverter control circuit 8 to drive the inverter circuit 3 and control the operation of the compressor 4. are doing. On the other hand, a current sensor 9 is connected to the current-carrying path connecting the AC power source 1 to the inverter circuit 2.
is provided, and its output is sent to the control section 7 via the input current detection circuit 10. When starting the compressor 4, the input current detection circuit 10 detects the input current at the time of starting, and detects the limit value of the total current including the operating current of the compressor 4 (overcurrent detector) stored in the control unit 7 in advance. If the input current at startup exceeds the limit value due to a locked state of the compressor 4, etc., the control unit 7 adjusts the output voltage of the inverter control circuit 8 to a constant value with respect to the operating frequency. Increase the voltage value (for example, 2V) step by step, lower the input current, and continue operating the compressor 4. When the operation of the compressor 4 is stable and the input current is below the predetermined release value, the predetermined output voltage is increased. I'm trying to change it back to .
【０００７】図２は、インバータ回路２の出力電圧／周
波数（Ｖ／Ｆ）特性を示す図で、図中に示すように、圧
縮機４の起動時に運転周波数Ｆの電圧値ａに対し、出力
電圧Ｖは加算されたｂの状態で起動するようにし、入力
電流を所定の上限値以下になるようにしている。図３は
本発明の詳細を示すフローチャートで、電源が投入され
圧縮機４が起動すると電流センサ９により入力電流検出
回路１０を経て入力電流が検出され（２１）、予じめ制
御部７に記憶された入力電流の限界値と比較し（２２）
、検出した入力電流が限界値を超える場合に、制御部７
はインバータ制御回路８を通じてインバータ回路２の出
力電圧を一定値ずつ上げることにより入力電流を下げて
（２３）、圧縮機４の運転を継続させる。以後、圧縮機
４の運転が安定すると、入力電流が低下し予じめ設定し
た解除値を下回ると（２４）、インバータ回路２の出力
電圧を下げ直前の出力電圧に戻し、（２５）圧縮機４の
運転を継続する。FIG. 2 is a diagram showing the output voltage/frequency (V/F) characteristics of the inverter circuit 2. As shown in the figure, the output voltage varies with respect to the voltage value a of the operating frequency F when the compressor 4 is started. The voltage V is set to start in the state of added b, and the input current is set to be below a predetermined upper limit value. FIG. 3 is a flowchart showing details of the present invention. When the power is turned on and the compressor 4 starts, the input current is detected by the current sensor 9 via the input current detection circuit 10 (21), and is stored in the control unit 7 in advance. (22)
, when the detected input current exceeds the limit value, the control unit 7
By increasing the output voltage of the inverter circuit 2 by a fixed value through the inverter control circuit 8, the input current is lowered (23), and the compressor 4 continues to operate. Thereafter, when the operation of the compressor 4 becomes stable, when the input current decreases and falls below a preset release value (24), the output voltage of the inverter circuit 2 is lowered and returned to the previous output voltage, and (25) the compressor Continue operation in step 4.
【０００８】[0008]
【発明の効果】以上のように本発明においては、圧縮機
の起動電流が、予じめ設定された上限値を超える場合に
、インバータ回路の出力周波数に対する電圧値を上げ、
起動電流を低く抑えることにより、圧縮機の保護装置等
の動作を避けるとともに、一定時間経過後に圧縮機の安
定運転を取り戻すことにより、冷房または暖房能力の低
下を防止し、室内の快適性を維持することができる。As described above, in the present invention, when the starting current of the compressor exceeds a preset upper limit, the voltage value relative to the output frequency of the inverter circuit is increased;
By keeping the starting current low, it avoids the operation of the compressor's protection device, etc., and by restoring stable operation of the compressor after a certain period of time, it prevents a decline in cooling or heating capacity and maintains indoor comfort. can do.
【図１】本発明の構成を示すブロック図である。FIG. 1 is a block diagram showing the configuration of the present invention.
【図２】インバータ回路の出力電圧／周波数特性図であ
る。FIG. 2 is an output voltage/frequency characteristic diagram of an inverter circuit.
【図３】本発明の詳細を示すフローチャートである。FIG. 3 is a flowchart showing details of the invention.
１ 交流電源 ２ 倍電圧整流回路 ３ インバータ回路 ４ 圧縮機 ５ 設定入力回路 ６ 室温センサ ７ 制御部 ８ インバータ制御回路 ９ 電流センサ １０ 入力電流検出回路 １１ 過電流検出回路 1 AC power supply 2 Voltage doubler rectifier circuit 3 Inverter circuit 4 Compressor 5 Setting input circuit 6 Room temperature sensor 7 Control section 8 Inverter control circuit 9 Current sensor 10 Input current detection circuit 11 Overcurrent detection circuit
Claims (1)
流電圧を生成しインバータ回路に印加するとともに、制
御部より周波数変換装置を経て所定の運転周波数に変換
してインバータ制御回路に印加し圧縮機の運転を制御し
てなる空気調和機において、上記制御部により負荷電流
値を検出し運転周波数におけるインバータ制御回路の出
力電圧を上げ、圧縮機の運転電流を含む全電流が過電流
検出器の最大許容範囲を超えない範囲まで下げて起動し
、圧縮機の運転が安定した後に同インバータ制御回路の
出力電圧を下げ、所定の出力電圧に復帰するようにして
なることを特徴とする空気調和機の制御方法。Claim 1: A DC voltage is generated from an AC power supply by a voltage doubler rectifier circuit and applied to an inverter circuit, and at the same time, the control unit converts it to a predetermined operating frequency via a frequency converter and applies it to the inverter control circuit. In an air conditioner whose operation is controlled, the control unit detects the load current value and increases the output voltage of the inverter control circuit at the operating frequency, so that the total current including the compressor operating current reaches the maximum allowable value of the overcurrent detector. Control of an air conditioner, characterized in that the air conditioner is started by lowering the voltage to a range that does not exceed the range, and after the operation of the compressor becomes stable, the output voltage of the inverter control circuit is lowered, and the output voltage is restored to a predetermined output voltage. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3151211A JPH04350442A (en) | 1991-05-27 | 1991-05-27 | Control method of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3151211A JPH04350442A (en) | 1991-05-27 | 1991-05-27 | Control method of air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04350442A true JPH04350442A (en) | 1992-12-04 |
Family
ID=15513668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3151211A Pending JPH04350442A (en) | 1991-05-27 | 1991-05-27 | Control method of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04350442A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195731A (en) * | 2013-04-11 | 2013-07-10 | 朱慧玲 | Discontinuous running ventilator controller |
| CN105299818A (en) * | 2014-06-30 | 2016-02-03 | 广东美的集团芜湖制冷设备有限公司 | Air conditioner and control method for air conditioner |
| CN107052904A (en) * | 2017-04-16 | 2017-08-18 | 赵洁 | A kind of safety monitoring device of Digit Control Machine Tool |
| CN108953182A (en) * | 2018-06-14 | 2018-12-07 | 珠海格力电器股份有限公司 | Control device, method and the warm-air drier using the device of starting fan |
| WO2020129246A1 (en) * | 2018-12-21 | 2020-06-25 | 三菱電機株式会社 | Air-conditioning device and control method therefor |
-
1991
- 1991-05-27 JP JP3151211A patent/JPH04350442A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195731A (en) * | 2013-04-11 | 2013-07-10 | 朱慧玲 | Discontinuous running ventilator controller |
| CN105299818A (en) * | 2014-06-30 | 2016-02-03 | 广东美的集团芜湖制冷设备有限公司 | Air conditioner and control method for air conditioner |
| CN105299818B (en) * | 2014-06-30 | 2018-03-13 | 广东美的集团芜湖制冷设备有限公司 | The control method of air conditioner and air conditioner |
| CN107052904A (en) * | 2017-04-16 | 2017-08-18 | 赵洁 | A kind of safety monitoring device of Digit Control Machine Tool |
| CN108953182A (en) * | 2018-06-14 | 2018-12-07 | 珠海格力电器股份有限公司 | Control device, method and the warm-air drier using the device of starting fan |
| WO2020129246A1 (en) * | 2018-12-21 | 2020-06-25 | 三菱電機株式会社 | Air-conditioning device and control method therefor |
| JPWO2020129246A1 (en) * | 2018-12-21 | 2021-09-09 | 三菱電機株式会社 | Air conditioner and its control method |
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