JPH0460334A - Control method for air conditioner - Google Patents
Control method for air conditionerInfo
- Publication number
- JPH0460334A JPH0460334A JP2171254A JP17125490A JPH0460334A JP H0460334 A JPH0460334 A JP H0460334A JP 2171254 A JP2171254 A JP 2171254A JP 17125490 A JP17125490 A JP 17125490A JP H0460334 A JPH0460334 A JP H0460334A
- Authority
- JP
- Japan
- Prior art keywords
- outdoor fan
- value
- compressor
- current
- timer
- 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
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
- 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
- Air Conditioning Control Device (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
この発明は、圧縮機に電力を供給する電源経路の電流が
、制限値を超えたとき室外ファンの運転を停止させる空
気調和装置の制御装置に関する。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention provides an air conditioning system that stops the operation of an outdoor fan when the current in a power supply path that supplies power to a compressor exceeds a limit value. The present invention relates to a control device for a harmonization device.
（従来の技術）
ヒートポンプ式、スプリット形の空気調和装置のうち、
室温の検出値と設定値との偏差に応じて圧縮機を能力制
御運転するものは、電源電圧が降下すると電流は増大す
る。この電流を一定値以下に抑えるために、圧縮機及び
室外ファンに電力を供給する共通の電源経路の電流を検
出し、検出電流が第１の制限値を超えたとき室外ファン
を停止させ、この第１の制限値よりも大きい第２の制限
値を超えたとき圧縮機を停止させるものがある。(Conventional technology) Among heat pump type and split type air conditioners,
In the case where the compressor is operated under capacity control according to the deviation between the detected value of the room temperature and the set value, the current increases when the power supply voltage drops. In order to suppress this current below a certain value, the current in the common power supply path that supplies power to the compressor and outdoor fan is detected, and when the detected current exceeds a first limit value, the outdoor fan is stopped. Some compressors shut down when a second limit value, which is greater than the first limit value, is exceeded.
この場合、室外ファンの停止を室外ファンレリース、圧
縮機の停止を圧縮機レリースと呼ぶことがある。そこで
、本明細書では室外ファンを停止させる第１の制限値を
室外ファンレリース点、圧縮機を停止させる第２の制限
値を圧縮機レリース点と称する。 第４図はこの種の制
御を行う従来の空気調和装置の動作説明図であり、室外
ファンを停止させる室外ファンレリース点を１２［Ａ］
に、圧縮機を停止させる圧縮機レリース点を１４．５［
Ａ］にそれぞれ設定している。In this case, stopping the outdoor fan is sometimes called outdoor fan release, and stopping the compressor is sometimes called compressor release. Therefore, in this specification, the first limit value for stopping the outdoor fan is referred to as the outdoor fan release point, and the second limit value for stopping the compressor is referred to as the compressor release point. FIG. 4 is an explanatory diagram of the operation of a conventional air conditioner that performs this type of control, and the outdoor fan release point at which the outdoor fan is stopped is set at 12 [A].
The compressor release point at which the compressor is stopped is set to 14.5[
A] respectively.
二こで、圧縮機及び室外ファンに電力を供給する共通の
電源経路の電流■かＩＯ［Ａ］よりも低い値から増大し
、！２［Ａ］を超えると室外ファンを停止させ、さらに
、１４．５［Ａ］を超えると圧縮機も停止させる。この
ように室外ファン及び圧縮機の両方を停止させれば電流
Ｉは急速に降下する。しかし、圧縮機を停止させた直後
は、起動負荷か大きいので電流値が１４．５［＾コ以下
になったとしても圧縮機をしばらく待機させる。一方、
室外ファンについては室外ファンレリース点である１２
［Ａ］よりも低い１０ ［Ａ］で復帰運転させている
。At two points, the current in the common power supply path that supplies power to the compressor and outdoor fan increases from a value lower than ■ or IO [A], and! When it exceeds 2 [A], the outdoor fan is stopped, and when it exceeds 14.5 [A], the compressor is also stopped. If both the outdoor fan and the compressor are stopped in this way, the current I will drop rapidly. However, immediately after the compressor is stopped, the starting load is large, so even if the current value falls below 14.5, the compressor is kept on standby for a while. on the other hand,
For outdoor fans, the outdoor fan release point is 12
Return operation is performed at 10 [A], which is lower than [A].
（発明か解決しようとする課題）
上述した従来の空気調和装置にあっては、起動時に圧縮
機レリースを起こり難くするべく、室外ファンレリース
点を低目に設定し、電流か増大傾向にある初期の時点で
室外ファンを停止させて起動を助けていた。(Problem to be solved by the invention) In the conventional air conditioner described above, in order to make it difficult for the compressor to release at startup, the outdoor fan release point is set to a low value, and the initial current tends to increase. At this point, I stopped the outdoor fan to help it start up.
しかしなから、起動後のいイっゆる定常運転中も、起動
時と同一の室外ファンレリース点を採用していたため、
電源電圧の低下等により室外ファンレリースが発生しや
すかった。However, even during steady operation after startup, the same outdoor fan release point as at startup was used, so
Outdoor fan release was likely to occur due to a drop in power supply voltage, etc.
このように、通常運転中に室外ファンレリースが発生す
ると室外熱交換器に霜が着き、そのため除霜回数が増え
る結果となる。As described above, when outdoor fan release occurs during normal operation, frost forms on the outdoor heat exchanger, resulting in an increase in the number of times of defrosting.
第５図（ａ）はこのことを説明するために、電源電圧が
８５ ［Ｖ］であるときの運転時間と電流との関係を記
録した図であり、第５図（ｂ）はその一部を拡大して示
した図である。これら各図において、室外ファンレリー
スの発生により着霜し、ピーク電流は次第に下がり始め
ている。そして、このピーク電流が１２［Ａ］より低い
ある値まで下かった段階で除霜運転が行われる。In order to explain this, Fig. 5(a) is a diagram recording the relationship between operating time and current when the power supply voltage is 85 [V], and Fig. 5(b) is a part of it. FIG. In each of these figures, frost formation occurs due to the outdoor fan release, and the peak current gradually begins to decrease. Then, when this peak current drops to a certain value lower than 12 [A], defrosting operation is performed.
かくして、上述した従来の空気調和装置は、通常運転中
の室外ファンレリースに起因して除霜回数が増えること
になり、これによって、暖房能力か低下するという問題
かあった。Thus, in the conventional air conditioner described above, the number of times of defrosting increases due to the release of the outdoor fan during normal operation, which causes a problem in that the heating capacity decreases.
この発明は上記の問題点を解決するためになされたもの
で、室外ファンレリースに起因する除霜回数の増大を抑
え、これによって、暖房能力を十分に発揮させることの
できる空気調和装置の制御方法を提供することを目的と
する。This invention was made in order to solve the above problems, and is a control method for an air conditioner that can suppress the increase in the number of times of defrosting caused by outdoor fan release and thereby fully utilize the heating capacity. The purpose is to provide
（課題を解決するための手段）
本発明は、圧縮機に電力を供給する電源経路の電流が制
限値を超えたとき室外ファンの運転を停止させる空気調
和装置において、前記制限値として所定の偏差を有する
高低二つの値を設定し、運転開始から起動するまで低い
値を用い、起動した後は高い値を用いることを特徴とす
るものである。(Means for Solving the Problems) The present invention provides an air conditioner that stops operation of an outdoor fan when a current in a power supply path that supplies electric power to a compressor exceeds a limit value, wherein a predetermined deviation is set as the limit value. The system is characterized in that two values, high and low, are set, and the low value is used from the start of operation until it is activated, and the high value is used after activation.
（作 用）
この発明においては、電流の制限値、すなわち、室外フ
ァンのレリース点として所定の偏差を有する高低二つの
値を設定し、起動時に低い値を用いて圧縮機の起動を助
け、定常運転中はこれより高い値を用いるようにしたの
で、室外ファンレリースに起因する除霜回数の増大を抑
えることができ、これによって、暖房能力を十分に発揮
させることができる。(Function) In this invention, two high and low values with a predetermined deviation are set as the current limit value, that is, the release point of the outdoor fan, and the low value is used at startup to help start the compressor and maintain steady state. Since a value higher than this is used during operation, it is possible to suppress an increase in the number of times of defrosting due to outdoor fan release, and thereby the heating capacity can be fully demonstrated.
（実施例） 第１図はこの発明の一実施例を示すブロック図である。(Example) FIG. 1 is a block diagram showing one embodiment of the present invention.
同図において、交流電源１に接続される電源経路に電源
スィッチ２が設けられている。この電源スィッチ２の負
荷側に室内ファン３が接続されている。また、電源スィ
ッチ２の負荷側には、リレー接点４ａを介して四方弁４
が接続される他、リレー接点５を介して室外ファン６が
接続され、さらに、リレー接点７を介して圧縮機８が接
続されている。また、室外ファン６および圧縮機８に流
れる電流を一括検出する電流センサ９が設けられ、電流
検出信号が制御装置１０に取り込まれるようになってい
る。In the figure, a power switch 2 is provided in a power path connected to an AC power source 1. An indoor fan 3 is connected to the load side of the power switch 2. In addition, a four-way valve 4 is connected to the load side of the power switch 2 via a relay contact 4a.
In addition to being connected, an outdoor fan 6 is connected via a relay contact 5, and a compressor 8 is further connected via a relay contact 7. Further, a current sensor 9 is provided that collectively detects the current flowing through the outdoor fan 6 and the compressor 8, and the current detection signal is taken into the control device 10.
制御装置１０は内部にタイマ１１を備えており、電流セ
ンサ９の電流検出値、運転停止スイッチ１２の指令、室
温設定スイッチ１３の室温設定値、および、室温センサ
１４の室温検出値に基づいて、図示省略のインバータ装
置を制御すると共に、電源スィッチ２、リレー接点４ａ
、 ５． ７を制御する。The control device 10 is equipped with a timer 11 inside, and based on the current detection value of the current sensor 9, the command of the operation stop switch 12, the room temperature setting value of the room temperature setting switch 13, and the room temperature detection value of the room temperature sensor 14, In addition to controlling an inverter device (not shown), the power switch 2 and relay contact 4a
, 5. Control 7.
なお、制御装置１０が室温設定スイッチ１３および室温
センサ■４の各出力に基づいて、インバータを制御して
圧縮機８を能力制御する点、および、運転モードに応じ
てリレー接点４ａを制御する点については、本発明に直
接関係しないのでその説明を省略し、特に、制御装置１
０かリレー接点５．７を制御する点について、第２図の
説明図を参照し、第３図のフローチャートに従って以下
に説明する。Note that the control device 10 controls the inverter to control the capacity of the compressor 8 based on the outputs of the room temperature setting switch 13 and the room temperature sensor 4, and controls the relay contact 4a according to the operating mode. Since they are not directly related to the present invention, their explanation will be omitted, and in particular, the control device 1
The point of controlling the zero relay contact 5.7 will be explained below with reference to the explanatory diagram of FIG. 2 and according to the flowchart of FIG. 3.
ここで、制御装置１０はマイクロコンピュータでなり、
その内部にはタイマ１１を備える他に、第２図に示した
室外ファン復帰点１０［＾］、室外ファンレリース点１
２［Ａ］ 、 １４［＾］、および圧縮機レリース点１
４．５［Ａ］を記憶させた記憶装置を備えている。Here, the control device 10 is a microcomputer,
In addition to having a timer 11 inside, it also has an outdoor fan return point 10 [^] and an outdoor fan release point 1 shown in FIG.
2[A], 14[^], and compressor release point 1
It is equipped with a storage device that stores 4.5 [A].
また、電源経路に設けられている電源スィッチ２は閉成
しているものとする。Further, it is assumed that the power switch 2 provided in the power supply path is closed.
先ず、制御装置１０はステップ１０１にて運転停止スイ
ッチ１２の状態を判定し、もし、運転指令が出力されて
おればステップ１０２にて室温設定スイッチ１３で設定
された室温設定値Ｔ と室温センサー４で検出された室
温検出値Ｔ とを比較する。ここで、Ｔ ＜Ｔ で
あるとき、すなわち、室温か設Ｓ
定温度より低いときにはステップ１０３にてタイマ１１
をスタートさせる。このタイマ１１には起動時間か設定
されている。First, the control device 10 determines the state of the operation stop switch 12 in step 101, and if an operation command is output, in step 102, the room temperature setting value T set by the room temperature setting switch 13 and the room temperature sensor 4 are output. The detected room temperature value T is compared with the detected room temperature value T. Here, when T < T, that is, when the room temperature is lower than the set temperature, the timer 11 is activated in step 103.
Start. This timer 11 has a startup time set therein.
次に、制御装置１０はステップ１０４でタイマ１１がタ
イムアツプしたか否かを判定し、タイムアツプしていな
ければステップ１０５で室外ファン６のレリース点Ｉｌ
を１２［＾］に設定し、ステップ１０７で電流センサ９
の電流検出値Ｉを読込む。そして、ステップ１０８で室
外ファン６のレリース点１１と電流検出値Ｉとを比較し
、Ｉ＞１．でないとき、すなわち、室外ファン６および
圧縮機８の合計電流Ｉが室外ファン６のレリース点１１
−１２［Ａ］より小さいときには、さらに、ステップ１
０９てこの電流■が室外ファン復帰点１０［Ａ］より大
きいか否かを判定し、大きくなければステップ１１０で
リレー接点５，７を閉成して室外ファン６および圧縮機
８を運転する。Next, the control device 10 determines whether or not the timer 11 has timed up in step 104. If the timer 11 has not timed up, the control device 10 proceeds to step 105 to determine whether or not the timer 11 has timed up.
is set to 12[^], and in step 107 the current sensor 9
Read the detected current value I. Then, in step 108, the release point 11 of the outdoor fan 6 and the detected current value I are compared, and if I>1. When the total current I of the outdoor fan 6 and the compressor 8 is not equal to the release point 11 of the outdoor fan 6,
-12 [A], further step 1
09 It is determined whether or not the current (2) of the lever is larger than the outdoor fan return point 10 [A]. If not, the relay contacts 5 and 7 are closed in step 110, and the outdoor fan 6 and compressor 8 are operated.
次に、制御装置１０はステップ１１１で再び室温設定値
Ｔ と室温検出値Ｔ とを比較し、Ｔ くＳ
ａ
ａＴ であることを確認し、ステップ１０４，１
０５，１０７゜１０８．１０９，１１０．ＩＩＩの処理
を繰り返す。この処理過程のステップ１０８で、検出電
流値■か室外ファンのレリース点１１−１２［Ａ］を超
えたと判定すると、ステップ１１２で検出電流値Ｉが圧
縮機のレリース点１４．５［＾］を超えているか否かを
判定し、超えていなければステップ１１３でリレー接点
５を開放して室外ファン６のみを停止させる。なお、ス
テップ１１４では、圧縮機８が運転されておればそのま
ま運転状態を保持し、続いて、ステップＩｌｌ、１０４
゜１０５．１０７，１０８，１１２，１１３．１１４の
処理を繰返す。Next, in step 111, the control device 10 again compares the room temperature set value T and the detected room temperature value T, and
a
Confirm that it is aT, and proceed to step 104,1.
05,107°108.109,110. Repeat the process in III. In step 108 of this processing process, if it is determined that the detected current value ■ exceeds the release point 11-12 [A] of the outdoor fan, in step 112 the detected current value I exceeds the release point 14.5 [^] of the compressor. It is determined whether or not the limit is exceeded, and if it is not exceeded, the relay contact 5 is opened in step 113 to stop only the outdoor fan 6. Note that in step 114, if the compressor 8 is in operation, the operating state is maintained as it is, and then in step Ill, 104
゜Repeat the processes of 105.107, 108, 112, 113.114.
次に、制御装置ｌＯはステップ１１２で検出電流Ｉが圧
縮機のレリース点１４．５［Ａ］を超えていると判定し
た場合には、ステップ１１５てリレー接点７を開放して
圧縮機８を停止させ、ステップｌ１６でそのまま待機す
る。待機中に検出電流ＩがｌＯ［Ａ］以下になればステ
ップ１１０で室外ファン６が再び運転される。Next, if the control device IO determines in step 112 that the detected current I exceeds the compressor release point 14.5 [A], the control device IO opens the relay contact 7 in step 115 and releases the compressor 8. It is stopped and remains on standby in step l16. If the detected current I becomes less than 1O [A] during standby, the outdoor fan 6 is operated again in step 110.
かかる処理をする過程のステップ１０４てタイマ１１の
タイムアツプを検出したとすると、すなわち、通常運転
中の制御装置１０はステップ１０Ｂで室外ファン６のレ
リース点１１を１４［＾］に設定上ステップ１０７〜１
１６の処理を行う。このようにして、室温検出値Ｔ が
上昇し、室温設定値Ｔ を超えＳ
るとステップ１１７でリレー接点５および７の両方を開
放して、室外ファン６および圧縮機８の両方を停止させ
る。Assuming that the time-up of the timer 11 is detected in step 104 of the process of performing such processing, that is, the control device 10 during normal operation sets the release point 11 of the outdoor fan 6 to 14 [^] in step 10B, and then performs the steps 107 to 107. 1
16 processing is performed. In this way, when the detected room temperature value T 1 rises and exceeds the set room temperature value S 2 , both relay contacts 5 and 7 are opened in step 117, and both the outdoor fan 6 and the compressor 8 are stopped.
かくして、この実施例によれば、室外ファンのレリース
点として１２［Ａ］と１４［Ａ］とを設定し、起動時に
１２［Ａ］を用いて起動を助けるが、定常運転中は１４
［Ａ］を用いるようにしたので、室外ファンレリースに
起因する除霜回数を減らすと共に、暖房能力を増大させ
ることができる。Thus, according to this embodiment, 12[A] and 14[A] are set as the release points of the outdoor fan, and 12[A] is used to assist the startup, but 14[A] is used during steady operation.
By using [A], it is possible to reduce the number of times of defrosting caused by outdoor fan release and to increase heating capacity.
なお、上記実施例では、圧縮機８のレリース点を１４．
５［＾］に設定したことに対応して室外ファン６のレリ
ース点を１２［Ａ］と１４［＾］に設定したが、家庭や
工場における電源の許容電流値によっては、これらの値
を随時変更することができ、要は、室外ファンのレリー
ス点として所定の偏差を有する高低二つの値を設定し、
起動時に低い値を用いて起動を助け、定常運転中はこれ
より高い値を用いるようにすれば、上述したと同様な制
御ができる。In the above embodiment, the release point of the compressor 8 is set to 14.
The release points of the outdoor fan 6 were set to 12 [A] and 14 [^] to correspond to the setting of 5 [^], but these values may be adjusted at any time depending on the allowable current value of the power supply at home or factory. The key is to set two high and low values with a predetermined deviation as the release point of the outdoor fan, which can be changed,
The same control as described above can be achieved by using a low value at startup to aid startup, and by using a higher value during steady operation.
以上の説明によって明らかなようにこの発明によれば、
室外ファンのレリース点として所定の偏差を有する高低
二つの値を設定し、起動時に低い値を用い、定常運転中
はこれより高い値を用いるようにしたので、室外ファン
レリースに起因する除霜回数の増大を抑えることができ
、これによって、暖房能力を十分に発揮させることかで
きる。As is clear from the above explanation, according to this invention,
We set two high and low values with a predetermined deviation as the release points of the outdoor fan, and used the lower value at startup and the higher value during steady operation, so the number of defrosts caused by the outdoor fan release was reduced. As a result, the heating capacity can be fully utilized.
制御装置、１１・・・タイマ、 １３・・・室温設定スイッチ、Control device, 11... timer, 13...Room temperature setting switch,
Claims (1)
たとき室外ファンの運転を停止させる空気調和装置にお
いて、前記制限値として所定の偏差を有する高低二つの
値を設定し、運転開始から起動するまで低い値を用い、
起動した後は高い値を用いることを特徴とする空気調和
装置の制御方法。In an air conditioner that stops the operation of an outdoor fan when the current in the power supply path that supplies power to the compressor exceeds a limit value, two high and low values with a predetermined deviation are set as the limit value, and the limit value is set to two high and low values with a predetermined deviation, and Use low values until booting,
A method for controlling an air conditioner, characterized in that a high value is used after startup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2171254A JPH0460334A (en) | 1990-06-28 | 1990-06-28 | Control method for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2171254A JPH0460334A (en) | 1990-06-28 | 1990-06-28 | Control method for air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0460334A true JPH0460334A (en) | 1992-02-26 |
Family
ID=15919916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2171254A Pending JPH0460334A (en) | 1990-06-28 | 1990-06-28 | Control method for air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0460334A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009236373A (en) * | 2008-03-26 | 2009-10-15 | Sharp Corp | Integrated air conditioner |
-
1990
- 1990-06-28 JP JP2171254A patent/JPH0460334A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009236373A (en) * | 2008-03-26 | 2009-10-15 | Sharp Corp | Integrated air conditioner |
| CN101545658B (en) | 2008-03-26 | 2011-11-02 | 夏普株式会社 | Integral type air conditioner |
| US8159170B2 (en) | 2008-03-26 | 2012-04-17 | Sharp Kabushiki Kaisha | Integral type air conditioner |
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