JPH0139019B2 - - Google Patents
Info
- Publication number
- JPH0139019B2 JPH0139019B2 JP58028123A JP2812383A JPH0139019B2 JP H0139019 B2 JPH0139019 B2 JP H0139019B2 JP 58028123 A JP58028123 A JP 58028123A JP 2812383 A JP2812383 A JP 2812383A JP H0139019 B2 JPH0139019 B2 JP H0139019B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- power supply
- value
- supply frequency
- control 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、空気調和機における電流制御装置の
改良に関するもので、電源周波数の差異による負
荷条件の変動を補正し、より理想的な電流制御が
得られるようにすることを目的の一つとするもの
である。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in a current control device for an air conditioner, and it corrects fluctuations in load conditions due to differences in power supply frequency to achieve more ideal current control. One of the objectives is to make it possible to
従来例の構成とその問題点
従来、商用電源周波数を判別して制御内容を切
換える制御装置としては、タイマ機能の修正、電
動機の速度制御等に例があるが、周波数の変動に
ともなつて電流制御を行うようにしたものはなか
つた。Conventional configurations and their problems Conventionally, there are examples of control devices that distinguish the commercial power supply frequency and switch control contents, such as modifying timer functions and controlling the speed of electric motors, but as the frequency changes, the current There was nothing to control it.
一方、電流制御装置の主負荷、例えば空気調和
機であれば圧縮機であるが、この場合、圧縮機は
吐出圧力−通電々流値の関係において、電源周波
数が50Hzの場合と、60Hzの場合とでは違つた関係
を持つている。一般に同一冷凍サイクルをもつ圧
縮機の通電々流が同一であれば60Hz時よりも50Hz
時の方が吐出圧力は高くなる。 On the other hand, the main load of a current control device, for example in the case of an air conditioner, is a compressor. They have different relationships with each other. In general, if the current flow of compressors with the same refrigeration cycle is the same, 50Hz will be lower than 60Hz.
The discharge pressure is higher when the time is higher.
そこで同一の圧縮機を使用した冷凍サイクルで
は、電源ブレーカによる電流の上限と、吐出圧力
値の上限を規制して圧縮機の機能、性能を保障す
るようにしている。したがつて、電源周波数が変
動すると、60Hz時は電源ブレーカの電流容量によ
る制限が厳しく、また50Hz時は吐出圧力の制限が
厳しい数字となる。 Therefore, in refrigeration cycles using the same compressor, the upper limit of the current and the upper limit of the discharge pressure value by the power breaker are regulated to ensure the function and performance of the compressor. Therefore, if the power supply frequency fluctuates, the current capacity of the power supply breaker will be severely limited at 60Hz, and the discharge pressure will be severely limited at 50Hz.
これを解消する一つの手段として50Hz、60Hzに
関わらず、電流設定を同一とすると、50Hz時の圧
力制限のために60Hz時は電源容量に充分余裕のあ
る時点で圧縮機を停止することになり、電源周波
数が60Hz地区では春および秋の高負荷時で暖房運
転しているときに突然圧縮機が停止し、暖房能力
が確保できないという事態になる等の問題があ
る。 One way to solve this problem is to make the current setting the same regardless of whether it is 50Hz or 60Hz. Because of the pressure limit at 50Hz, the compressor will have to stop when there is sufficient power capacity at 60Hz. In areas where the power supply frequency is 60Hz, there are problems such as the compressor suddenly stopping during heating operation during high loads in spring and autumn, resulting in a situation where heating capacity cannot be secured.
発明の目的
本発明の空気調和機の電流制御装置は、上記従
来の問題点を解消するもので、異つた周波数の電
源を用いたとしても、その周波数の差異による負
荷条件の変動を補正し、より理想的な電流制御が
得られるようにするものである。OBJECT OF THE INVENTION The current control device for an air conditioner of the present invention solves the above-mentioned conventional problems, and even when power supplies with different frequencies are used, it corrects fluctuations in load conditions due to the difference in frequency, This allows more ideal current control to be obtained.
発明の構成
本発明の空気調和機の電流制御装置は、運転機
器の電流を検出する電流検知器とこの電流検知器
の検出電流値が設定値に達すると前記運転機器へ
の通電を制御する制御装置を具備し、使用する電
源の周波数に応じて前記制御装置における運転機
器の電流設定値を複数設け、使用する電源の周波
数に応じて前記制御信号の電流設定値を切換える
切換手段を設けたもので、使用電源の周波数が異
つたとしても常に効率のよい運転が行なえる。Configuration of the Invention The current control device for an air conditioner of the present invention includes a current detector that detects the current of an operating device, and a control that controls energization to the operating device when the detected current value of the current detector reaches a set value. A device comprising: a plurality of current setting values for the operating equipment in the control device according to the frequency of the power source used; and a switching means for switching the current setting value of the control signal according to the frequency of the power source used. Therefore, even if the frequency of the power source used differs, efficient operation can always be performed.
実施例の説明
以下、本発明の一実施例について添付図面によ
り説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.
まず、第１図により空気調和機の概略について
説明する。 First, the outline of the air conditioner will be explained with reference to FIG.
同図において、１は室内側フアンモータ、２は
補助ヒータ、３は室外側フアンモータ、４は圧縮
機で、本実施例によれば電流変成器（以下CTと
称す）５により総合電流を検知し、補助ヒータ
２、および室外側フアンモータ３、圧縮機４をそ
の総合電流値が設定値を越える場合にCT５によ
りリレー９，１０を介して制御する。 In the figure, 1 is an indoor fan motor, 2 is an auxiliary heater, 3 is an outdoor fan motor, 4 is a compressor, and according to this embodiment, a current transformer (hereinafter referred to as CT) 5 detects the total current. However, the auxiliary heater 2, the outdoor side fan motor 3, and the compressor 4 are controlled by the CT 5 via the relays 9 and 10 when their total current value exceeds the set value.
次に第２図により前記空気調和機の運転を制御
する制御部の電子回路図について説明する。ここ
で第１図と同一のものについては同一の番号を付
して説明を省略する。 Next, an electronic circuit diagram of a control section that controls the operation of the air conditioner will be explained with reference to FIG. Components that are the same as those in FIG. 1 are given the same numbers and their explanations will be omitted.
同図において６はＰチヤンネルのマイクロコン
ピユータを示す。O0〜O3はマイクロコンピユー
タ６の出力ポートを示し、またI0，I1はマイクロ
コンピユータ６の入力ポートを示す。７はCT５
から出力された電流を電圧に変換する電流−電圧
変換回路で、その出力電圧はVIで表わされ、CT
５を流れる電流ICTと電流−電圧変換回路７の出
力電圧VIとの相関関係は第３図に示すようにほ
ぼ比例関係にある。８は出力電圧VIと基準電圧
VREFとを比較する比較器である。この基準電圧
VREFには、マイクロコンピユータ６の出力ポート
O0，O1からの２ビツトのスキヤンニングにより、
第４図に示すような４点の電位が繰返し与えら
れ、出力ポートO0は復帰信号、出力ポートO1は
50Hzの信号を与えている。出力ポートO2からは
補助ヒータ２用のリレー９の制御信号が出力さ
れ、また出力ポートO3からは圧縮機４用のリレ
ー１０の制御信号が出力される。１１は50Hz、60
Hz切換用のスイツチで、電源周波数に応じて切換
えられる。 In the figure, 6 indicates a P channel microcomputer. O 0 to O 3 indicate output ports of the microcomputer 6, and I 0 and I 1 indicate input ports of the microcomputer 6. 7 is CT5
This is a current-to-voltage conversion circuit that converts the current output from the
The correlation between the current I CT flowing through the circuit 5 and the output voltage V I of the current-voltage conversion circuit 7 is approximately proportional as shown in FIG. 8 is the output voltage V I and the reference voltage
This is a comparator that compares V REF . This reference voltage
V REF is the output port of microcomputer 6.
By scanning 2 bits from O 0 and O 1 ,
Potentials at four points as shown in Figure 4 are repeatedly applied, output port O 0 is a return signal, output port O 1 is a return signal, and output port O 1 is a return signal.
It is giving a 50Hz signal. A control signal for the relay 9 for the auxiliary heater 2 is output from the output port O 2 , and a control signal for the relay 10 for the compressor 4 is output from the output port O 3 . 11 is 50Hz, 60
This is a Hz changeover switch that can be changed according to the power supply frequency.
上記構成において、スイツチ１１を切換え操作
すると第５図に示すように２つのモードが選択さ
れるとともに、同図に示す如く50Hz時および60Hz
時の検出電流ICTによりマイクロコンピユータ６
によつて制御される補助ヒータ２および圧縮機４
の動作モードが得られる。ここで、実線部が60Hz
時を、また破線部が50Hz時を表わす。暖房運転時
で60Hzの場合の動作を簡単に説明するとCT５に
よる検出電流ICTが補助ヒータ２、圧縮機４共に
通電している状態から動作設定値に達すると、補
助ヒータ２のみがOFFされる。そして更に電流
ICTが上昇し、動作設定値をt1の期間以上連続して
越えると、圧縮機４も停止する。圧縮機４の復帰
は、マイクロコンピユータ６に付加された再起動
禁止タイマにより時間t2後に行われる。またヒー
タ２がOFFで圧縮機４が運転されているとき、
検出電流ICTが復帰設定を下回ると、補助ヒータ
２が再通電される。 In the above configuration, when the switch 11 is operated, two modes are selected as shown in FIG.
When the detection current I CT is detected by the microcomputer 6
Auxiliary heater 2 and compressor 4 controlled by
operating modes are obtained. Here, the solid line part is 60Hz
The broken line represents the time of 50Hz. To briefly explain the operation during heating operation at 60Hz, when the detected current I CT by CT5 reaches the operating setting value from a state where both auxiliary heater 2 and compressor 4 are energized, only auxiliary heater 2 is turned off. . and even more current
When I CT increases and exceeds the operating setpoint continuously for a period of time t 1 , compressor 4 also stops. The compressor 4 is restored after time t2 by a restart prohibition timer added to the microcomputer 6. Also, when the heater 2 is OFF and the compressor 4 is operating,
When the detection current I CT falls below the recovery setting, the auxiliary heater 2 is re-energized.
以上が概略の動作であるが、次に50Hz、60Hz切
換用のスイツチ１１を60Hzから50Hzに切換えたと
き上記CT５が検出する電流ICTは破線のようにな
り設定値が若干異動、補正される。すなわち、こ
の50Hzの状態でした場合設定値が補正されるのみ
でマイクロコンピユータ６により同種の制御が行
われることになる。 The above is an outline of the operation.Next, when the switch 11 for switching between 50Hz and 60Hz is switched from 60Hz to 50Hz, the current I CT detected by the above CT5 will be as shown by the broken line, and the set value will change and be corrected slightly. . That is, in this 50 Hz state, the same type of control will be performed by the microcomputer 6 only by correcting the set value.
したがつて電源周波数が50Hzおよび60Hzいずれ
の場合においても、圧縮機電流−吐出圧力の関係
の相違を補正することができ、電源周波数が50
Hz、60Hzいずれの地区においても充分な暖房能力
を確保することができる。またそのために構成も
電子回路上わずかの部品の増加で対処できる。 Therefore, it is possible to correct the difference in the relationship between compressor current and discharge pressure when the power supply frequency is 50Hz or 60Hz.
Sufficient heating capacity can be secured in both Hz and 60Hz areas. Moreover, the configuration can be handled by adding only a small number of components to the electronic circuit.
ここで、電源周波数50Hz、60Hzの入力切換え
は、外付の切換用のスイツチ１１によらなくと
も、マイクロコンピユータ６の有する基準発振周
波数とタイマ機能の基準用の50Hzまたは60Hz入力
との演算により判別して行うこともできる。さら
に電源周波数の切換えに応じてヒータ２の電流設
定値を変えずに圧縮機４の電流設定値を変えるよ
うにしてもよく、またその両者を最適値に変える
ようにしてもよい。 Here, the input switching between the power supply frequency of 50 Hz and 60 Hz is determined by calculating the reference oscillation frequency of the microcomputer 6 and the reference 50 Hz or 60 Hz input of the timer function, without using the external switching switch 11. You can also do this by Furthermore, the current setting value of the compressor 4 may be changed without changing the current setting value of the heater 2 in accordance with the switching of the power supply frequency, or both may be changed to an optimum value.
なお、本実施例においては、電源周波数の変動
検出およびその変動検出による電流設定値の変更
を、マイクロコンピユータ６にて行うようにした
が、これに限らず、一般に知られているデイスク
リート回路にても同様に実施できる。 In this embodiment, the microcomputer 6 is used to detect fluctuations in the power supply frequency and change the current setting value based on the detected fluctuations, but the present invention is not limited to this. It can also be implemented in the same way.
発明の効果
上記実施例より明らかなように、本発明におけ
る空気調和機の電流制御装置は、運転機器の設定
電流値を、低い電源周波数のときは低い値に、高
い電源周波数のときは前記値よりも高い値に設定
しているため、いずれの電源周波数の場合であつ
ても確実に運転機器の保護が行え、また運転機器
は、電源周波数に応じた能力が発揮でき、特に運
転機器が高い電源周波数で運転される場合、低い
電源周波数で運転される設定電流値によつてその
能力が抑えられ、運転機器が持つ能力を最大限に
発揮できないといつたこともなく、効率の良い空
気調和が行える等、種々の利点を有するものであ
る。Effects of the Invention As is clear from the above embodiments, the current control device for an air conditioner according to the present invention sets the set current value of the operating equipment to a low value when the power supply frequency is low, and to the above value when the power supply frequency is high. Because it is set to a higher value than When operated at the power supply frequency, its performance is suppressed by the set current value that is operated at a low power supply frequency, and the operating equipment is not able to demonstrate its full potential, ensuring efficient air conditioning. It has various advantages, such as the ability to perform
第１図は本発明の一実施例の電流制御装置を具
備した空気調和機の概略電気回路図、第２図は同
電流制御装置の概略電気回路図、第３図は同電流
制御装置における電流、電圧変換回路の出力電圧
−電流特性図、第４図は同電流制御装置における
比較器の基準電圧の変化を示す説明図、第５図は
同電流制御装置の異なる電源周波数時における運
転機器の運転状態を示す説明図である。
１……室内側フアンモータ、２……補助ヒー
タ、３……室外側フアンモータ、４……圧縮機、
５……CT（電流検知器）、６……マイクロコンピ
ユータ（制御装置）。
FIG. 1 is a schematic electrical circuit diagram of an air conditioner equipped with a current control device according to an embodiment of the present invention, FIG. 2 is a schematic electrical circuit diagram of the same current control device, and FIG. , an output voltage-current characteristic diagram of the voltage conversion circuit, Fig. 4 is an explanatory diagram showing changes in the reference voltage of the comparator in the same current control device, and Fig. 5 shows the operating equipment of the same current control device at different power supply frequencies. It is an explanatory diagram showing an operating state. 1...Indoor fan motor, 2...Auxiliary heater, 3...Outdoor fan motor, 4...Compressor,
5...CT (current detector), 6...microcomputer (control device).
Claims (1)
この電流検知器の検出電流値が設定値に達すると
前記運転機器への通電を停止する制御装置を具備
し、この制御装置を、異なる電源周波数に対応し
た複数の電流設定値を記憶した電流設定値記憶手
段と、前記電流検知器の検出電流値と使用してい
る電源周波数の電流設定値との比較を行い、その
比較結果を前記運転機器へ出力する出力手段と、
使用する電源周波数に応じて前記電流設定値を切
換える切換手段より構成し、前記電源周波数が高
い電流設定値を、電源周波数が低い電流設定値よ
りも高い値に設定した空気調和機の電流制御装
置。1 Equipped with a current detector that detects the current of the operating equipment and a control device that stops energizing the operating equipment when the detected current value of the current detector reaches a set value, and this control device is configured to operate at a different power frequency. A current setting value storage means that stores a plurality of corresponding current setting values compares the detected current value of the current detector with the current setting value of the power supply frequency being used, and sends the comparison result to the operating equipment. an output means for outputting;
A current control device for an air conditioner, comprising a switching means for switching the current setting value according to the power supply frequency used, the current setting value having a high power supply frequency being set to a higher value than the current setting value having a low power supply frequency. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58028123A JPS58156143A (en) | 1983-02-21 | 1983-02-21 | Electric current controller of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58028123A JPS58156143A (en) | 1983-02-21 | 1983-02-21 | Electric current controller of air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58156143A JPS58156143A (en) | 1983-09-17 |
| JPH0139019B2 true JPH0139019B2 (en) | 1989-08-17 |
Family
ID=12240012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58028123A Granted JPS58156143A (en) | 1983-02-21 | 1983-02-21 | Electric current controller of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58156143A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030073417A (en) * | 2002-03-11 | 2003-09-19 | 엘지전선 주식회사 | Current control system of the chiller compressor motor |
| CN100424431C (en) * | 2006-09-30 | 2008-10-08 | 四川长虹电器股份有限公司 | Cooling system for cold and hot water machine set with fan disc pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5585841A (en) * | 1978-12-22 | 1980-06-28 | Hitachi Ltd | Air conditioner |
-
1983
- 1983-02-21 JP JP58028123A patent/JPS58156143A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58156143A (en) | 1983-09-17 |
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