JPH05118617A - Controller of air conditioner - Google Patents
Controller of air conditionerInfo
- Publication number
- JPH05118617A JPH05118617A JP3279351A JP27935191A JPH05118617A JP H05118617 A JPH05118617 A JP H05118617A JP 3279351 A JP3279351 A JP 3279351A JP 27935191 A JP27935191 A JP 27935191A JP H05118617 A JPH05118617 A JP H05118617A
- Authority
- JP
- Japan
- Prior art keywords
- power failure
- pulse signal
- compressor
- electric power
- instantaneous power
- 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
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、空気調和機の制御装置
に関し、詳しくは商用電源の瞬時停電時の再起動保護に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an air conditioner, and more particularly to restart protection in the event of a momentary power failure of a commercial power source.
【0002】[0002]
【従来の技術】従来、商用電源の瞬時停電が発生する
と、マイコン制御部は電源回路に挿入された大容量のコ
ンデンサによりバックアップされ、十数サイクル程度の
瞬時停電に対しては影響を受けず誤動作することがない
が、圧縮機は数サイクルの瞬時停電により停止状態にな
り、この間マイコン制御部からは圧縮機の運転指令が継
続して出され、圧縮機は商用電源の瞬時停電が回復する
と直ちに再起動する状態に設定されている。しかし、圧
縮機の停止時点では、冷媒回路の高圧側と低圧側には高
い圧力差が一定時間経過するまで残されており、そのま
ま圧縮機を再起動すると圧縮機モータにかかる負荷が大
きくなり、圧縮機モータのロックを生じたり、圧縮機に
設けた過電流リレーが動作したり、過電流リレーの接点
が焼付き、結果として過電流による発熱で圧縮機モータ
を損傷する等の事故が発生している。2. Description of the Related Art Conventionally, when an instantaneous power failure of a commercial power source occurs, the microcomputer control unit is backed up by a large-capacity capacitor inserted in the power supply circuit and malfunctions without being affected by an instantaneous power failure of about ten and several cycles. However, the compressor goes into a stopped state due to a momentary power failure for several cycles, during which the microcomputer control unit continues to issue a command to operate the compressor, and the compressor immediately after the momentary power failure of commercial power is restored. It is set to restart. However, when the compressor is stopped, a high pressure difference remains on the high pressure side and the low pressure side of the refrigerant circuit until a certain period of time elapses, and if the compressor is restarted as it is, the load on the compressor motor increases, The compressor motor may be locked, the overcurrent relay installed in the compressor may operate, the contacts of the overcurrent relay may seize, and as a result, heat generated by overcurrent may cause damage to the compressor motor. ing.
【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、商用電源の瞬時停電によ
り圧縮機が停止し、瞬時停電回復後直ちにマイコン制御
部により再起動する場合に、一定時間圧縮機の再起動を
遅らせ、圧縮機の高圧側低圧側の圧力差を軽減してから
再起動するようにした空気調和機の制御装置を提供する
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 problems of the prior art. In the case where the compressor is stopped by the momentary power failure of the commercial power supply and is restarted by the microcomputer controller immediately after the recovery from the momentary power failure. Another object of the present invention is to provide a control device for an air conditioner that delays the restart of the compressor for a certain period of time to reduce the pressure difference between the high pressure side and the low pressure side of the compressor and then restarts the compressor.
【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、商用電源の電圧波形をパルス信号に変換するパルス
信号変換回路と、同パルス信号をマイコン制御部の電源
割り込みポートより取込みパルス信号の欠落により瞬時
停電を検出し瞬時停電中の割込み検索回数により瞬時停
電時間をカウントするカウンタと、検出された瞬時停電
時間値と予じめ設定された基準値と比較する比較回路と
遅延タイマとを具え、瞬時停電を検出し上記瞬時停電時
間値が基準値を上回る時に、圧縮機の再起動を遅延タイ
マにより一定時間遅らせ制御するようにした。In order to achieve the above object, a pulse signal conversion circuit for converting a voltage waveform of a commercial power supply into a pulse signal and a pulse signal taken in from a power supply interrupt port of a microcomputer control unit A counter that detects an instantaneous power failure due to missing and counts the instantaneous power failure time by the number of interrupt searches during the instantaneous power failure, a comparison circuit that compares the detected instantaneous power failure time value with a preset reference value, and a delay timer When the instantaneous power failure is detected and the instantaneous power failure time value exceeds the reference value, the restart of the compressor is delayed by a delay timer and controlled.
【0005】[0005]
【作用】上記の構成によれば、商用電源の電圧波形をパ
ルス信号変換回路によりパルス信号に変換して、電源割
り込みポートよりマイコン制御部に取り込み、同パルス
信号をマイコン制御部の割り込みチェックにより確認
し、パルス信号の欠落により瞬時停電を検出し、瞬時停
電中のマイコン制御部のクロックにより操作される割込
み検索の回数をカウンタによりカウントして瞬時停電時
間を計測し、瞬時停電時間を予じめメモリに記憶した基
準値と比較し、基準値を超える場合に遅延タイマを駆動
し、一定時間経過後に圧縮機を再起動することにより、
停止直後の過負荷状態での圧縮機の再起動を阻止し、圧
縮機モータのロックや過負荷電流による発熱を防止する
ことがてきる。According to the above configuration, the voltage waveform of the commercial power supply is converted into a pulse signal by the pulse signal conversion circuit, is taken into the microcomputer control unit from the power supply interrupt port, and the pulse signal is confirmed by the interrupt check of the microcomputer control unit. The instantaneous power failure time is detected by detecting a momentary power failure due to the lack of a pulse signal, counting the number of interrupt searches operated by the clock of the microcomputer control unit during the momentary power failure by the counter, and measuring the instantaneous power failure time. By comparing with the reference value stored in the memory, driving the delay timer when exceeding the reference value, and restarting the compressor after a certain period of time,
It is possible to prevent the compressor from being restarted in the overload state immediately after the stop, and to prevent the compressor motor from being locked and the heat generation due to the overload current.
【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要部ブロック図
で、商用電源を整流する整流回路1、マイコン制御部
2、商用電源の電圧波形をパルス信号に変換するパルス
信号変換回路3と、圧縮機4を駆動する圧縮機駆動回路
5とから構成されている。圧縮機4が運転している時
に、商用電源で十数サイクル程度の瞬時停電が発生する
と、マイコン制御部2は整流回路1に設けられた大容量
のコンデンサ6により、電圧の瞬間的降下をバックアッ
プされ、商用電源での瞬時停電が回復するまで正常な動
作を維持している。一方、圧縮機4は商用電源の数サイ
クルを超える瞬時停電が発生すると停止し、瞬時停電が
終了するとマイコン制御部2からの起動信号により、直
ちに再起動するように作動する。Embodiments 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. A rectifier circuit 1 for rectifying a commercial power source, a microcomputer control unit 2, a pulse signal conversion circuit 3 for converting a voltage waveform of the commercial power source into a pulse signal, and a compressor. 4 and a compressor drive circuit 5 for driving the compressor 4. When the compressor 4 is operating and an instantaneous power failure of about 10 cycles occurs with the commercial power supply, the microcomputer controller 2 backs up the instantaneous voltage drop by the large-capacity capacitor 6 provided in the rectifier circuit 1. The normal operation is maintained until the momentary power failure with commercial power is recovered. On the other hand, the compressor 4 stops when a momentary power failure that exceeds several cycles of the commercial power source occurs, and when the momentary power failure ends, the compressor 4 is restarted immediately by a start signal from the microcomputer control unit 2.
【0007】圧縮機4が運転している時には、吐出側の
冷媒ガス圧力が高く吸入側の冷媒ガス圧力は低く保持さ
れ、瞬時停電による圧縮機4の停止で吐出側の冷媒ガス
は冷媒回路の蒸発器、膨張弁、凝縮器を通じて徐々に吸
入側に流れるとともに、圧縮機4の内部を吸入側に流れ
るがその流量は少量で、瞬時停電が終了した時点では吐
出側と吸入側の圧力差が大きいまま残り、マイコン制御
部2からの起動信号により圧縮機4を再起動すると、圧
縮機モータが過負荷状態になる。この状態を避けるため
に、本発明では整流回路1から商用電源の電圧波形を取
り出し、パルス信号変換回路3によりパルス信号化し
て、マイコン制御部2の電源割り込み端子に入力し、マ
イコン制御部2による割込み検索によりパルス信号が継
続していることから商用電源が正常であることを確認
し、瞬時停電が発生した時にパルス信号変換回路3から
のパルス信号の欠落を検出して瞬時停電と判断し、瞬時
停電中のマイコン制御部2の割込み検索回数をカウンタ
7によりカウントすることにより瞬時停電時間を計測
し、予じめ圧縮機4が停止する瞬時停電時間を実測等に
より求めてマイコン制御部2のメモリ8に記憶させた基
準値と計測した瞬時停電時間を比較回路9により比較
し、計測した瞬時停電時間が基準値を上回る場合に、遅
延タイマ10を駆動し一定時間マイコン制御部2からの再
起動信号を遮断し、吐出側と吸入側の圧力差が再起動に
支障ない状態になるまで待ち、タイムアップ後再起動信
号により圧縮機4を再起動するようにしている。When the compressor 4 is in operation, the refrigerant gas pressure on the discharge side is kept high and the refrigerant gas pressure on the suction side is kept low. When the compressor 4 is stopped due to an instantaneous power failure, the refrigerant gas on the discharge side is kept in the refrigerant circuit. It gradually flows to the suction side through the evaporator, expansion valve, and condenser, and also flows inside the compressor 4 to the suction side, but its flow rate is small, and when the momentary power failure ends, the pressure difference between the discharge side and the suction side is When it remains large, the compressor motor is overloaded when the compressor 4 is restarted by the start signal from the microcomputer control unit 2. In order to avoid this state, in the present invention, the voltage waveform of the commercial power supply is taken out from the rectifier circuit 1, converted into a pulse signal by the pulse signal conversion circuit 3, and input to the power supply interrupt terminal of the microcomputer control unit 2 and then by the microcomputer control unit 2. It is confirmed by the interrupt search that the commercial power supply is normal because the pulse signal is continuing, and when a momentary power failure occurs, the lack of the pulse signal from the pulse signal conversion circuit 3 is detected and it is determined that the power failure has occurred. The momentary power failure time is measured by counting the number of interrupt searches of the microcomputer controller 2 during the momentary power failure by the counter 7, and the momentary power failure time when the preliminary compressor 4 stops is obtained by actual measurement and the like. The reference value stored in the memory 8 and the measured instantaneous power failure time are compared by the comparison circuit 9, and if the measured instantaneous power failure time exceeds the reference value, the delay time is delayed. Drive the motor 10 and shut off the restart signal from the microcomputer control unit 2 for a certain period of time, wait until the pressure difference between the discharge side and the suction side does not interfere with the restart, and after the time is up, restart the compressor 4 I'm trying to restart.
【0008】図2は本発明の詳細を示すフローチャート
で、圧縮機4の運転中にマイコン制御部2の電源割込み
ポートに入るパルス信号の欠落から商用電源の瞬時停電
を検出し、瞬時停電中の割込み検索回数から瞬時停電時
間をカウントし(21)、瞬時停電時間が基準値tを上回
った時(22)圧縮機4の運転停止状態を確認し(23)、
圧縮機4が停止状態にある時に遅延タイマ10をスタート
させ(24)、一定時間経過してタイムアップした後に
(25)、マイコン制御部2からの信号により圧縮機4を
再起動する(26)ようにしている。FIG. 2 is a flow chart showing the details of the present invention. During the operation of the compressor 4, a momentary power failure of the commercial power source is detected from the lack of the pulse signal entering the power source interrupt port of the microcomputer control unit 2, and during the momentary power failure. The momentary power failure time is counted from the number of interrupt searches (21), and when the momentary power failure time exceeds the reference value t (22), the operation stop state of the compressor 4 is confirmed (23),
The delay timer 10 is started when the compressor 4 is in a stopped state (24), and after a certain period of time elapses (25), the compressor 4 is restarted by a signal from the microcomputer control unit 2 (26). I am trying.
【0009】[0009]
【発明の効果】以上のように本発明において、商用電源
の瞬時停電が発生した時に、瞬時停電を検出するととも
に瞬時停電時間をカウントし、瞬時停電時間が圧縮機モ
ータの停止までの時間を超える場合に、圧縮機の再起動
を遅延タイマにより一定時間遅らせ、瞬時停電直後の過
負荷状態での圧縮機の再起動を避け、圧縮機モータのロ
ックや過負荷電流による発熱を防止することができる。As described above, in the present invention, when an instantaneous power failure of the commercial power source occurs, the instantaneous power failure is detected and the instantaneous power failure time is counted, and the instantaneous power failure time exceeds the time until the compressor motor is stopped. In this case, the restart of the compressor can be delayed by the delay timer for a certain period of time to avoid restarting the compressor in the overload state immediately after the momentary power failure, and prevent the compressor motor from locking and heat generation due to overload current. .
【図1】本発明の構成を示す要部ブロック図である。FIG. 1 is a principal block diagram showing a configuration of the present invention.
【図2】本発明の詳細を示すフローチャートである。FIG. 2 is a flow chart showing details of the present invention.
1 整流回路 2 マイコン制御部 3 パルス信号変換回路 4 圧縮機 5 圧縮機駆動回路 6 コンデンサ 7 カウンタ 8 メモリ 9 比較回路 10 遅延タイマ 1 Rectifier circuit 2 Microcomputer control unit 3 Pulse signal conversion circuit 4 Compressor 5 Compressor drive circuit 6 Capacitor 7 Counter 8 Memory 9 Comparison circuit 10 Delay timer
Claims (1)
するパルス信号変換回路と、同パルス信号をマイコン制
御部の電源割り込みポートより取込みパルス信号の欠落
により瞬時停電を検出し瞬時停電中の割込み検索回数に
より瞬時停電時間をカウントするカウンタと、検出され
た瞬時停電時間値と予じめ設定された基準値と比較する
比較回路と遅延タイマとを具え、瞬時停電を検出し上記
瞬時停電時間値が基準値を上回る時に、圧縮機の再起動
を遅延タイマにより一定時間遅らせ制御するようにして
なることを特徴とする空気調和機の制御装置。1. A pulse signal conversion circuit for converting a voltage waveform of a commercial power supply into a pulse signal, and the same pulse signal is taken from a power supply interrupt port of a microcomputer control unit to detect an instantaneous power failure due to a missing pulse signal, and an interrupt during the instantaneous power failure. It is equipped with a counter that counts the instantaneous power failure time according to the number of searches, a comparator circuit that compares the detected instantaneous power failure time value with a preset reference value, and a delay timer. When the value exceeds a reference value, the restart of the compressor is controlled by delaying it for a certain period of time by a delay timer to control the air conditioner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3279351A JPH05118617A (en) | 1991-10-25 | 1991-10-25 | Controller of air conditioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3279351A JPH05118617A (en) | 1991-10-25 | 1991-10-25 | Controller of air conditioner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05118617A true JPH05118617A (en) | 1993-05-14 |
Family
ID=17609963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3279351A Pending JPH05118617A (en) | 1991-10-25 | 1991-10-25 | Controller of air conditioner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05118617A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20010018553A (en) * | 1999-08-20 | 2001-03-05 | 전주범 | Compressor protection method when momentary power failure for air conditioner |
KR101427424B1 (en) * | 2007-12-27 | 2014-08-08 | 한라비스테온공조 주식회사 | Control method of air conditioner for vehicle |
JP2015153637A (en) * | 2014-02-17 | 2015-08-24 | 岩崎電気株式会社 | Led power supply device and led illuminating device |
US9574785B2 (en) | 2009-05-21 | 2017-02-21 | Lennox Industries Inc. | Staggered start-up HVAC system, a method for starting an HVAC unit and an HVAC controller configured for the same |
-
1991
- 1991-10-25 JP JP3279351A patent/JPH05118617A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20010018553A (en) * | 1999-08-20 | 2001-03-05 | 전주범 | Compressor protection method when momentary power failure for air conditioner |
KR101427424B1 (en) * | 2007-12-27 | 2014-08-08 | 한라비스테온공조 주식회사 | Control method of air conditioner for vehicle |
US9574785B2 (en) | 2009-05-21 | 2017-02-21 | Lennox Industries Inc. | Staggered start-up HVAC system, a method for starting an HVAC unit and an HVAC controller configured for the same |
JP2015153637A (en) * | 2014-02-17 | 2015-08-24 | 岩崎電気株式会社 | Led power supply device and led illuminating device |
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