JPH1019427A - Air conditioner with diagnosis of trouble - Google Patents
Air conditioner with diagnosis of troubleInfo
- Publication number
- JPH1019427A JPH1019427A JP8174574A JP17457496A JPH1019427A JP H1019427 A JPH1019427 A JP H1019427A JP 8174574 A JP8174574 A JP 8174574A JP 17457496 A JP17457496 A JP 17457496A JP H1019427 A JPH1019427 A JP H1019427A
- Authority
- JP
- Japan
- Prior art keywords
- air conditioner
- failure
- outdoor
- compressor
- expansion valve
- 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.)
- Granted
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空気調和機におい
て運転状況を監視する装置に関し、特に故障診断などを
行う装置に好適である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for monitoring an operating condition in an air conditioner, and is particularly suitable for a device for performing a failure diagnosis or the like.
【０００２】[0002]
【従来の技術】故障診断装置としては、特開平７−７１
８０３号公報に記載のものが知られ、特開平７−１０３
５３９号公報には自己診断モードを設けることが述べら
れている。2. Description of the Related Art Japanese Patent Laid-Open No. 7-71 discloses a failure diagnosis apparatus.
No. 803 is known.
No. 539 describes that a self-diagnosis mode is provided.
【０００３】[0003]
【発明が解決しようとする課題】上記の自己診断方法
は、空気調和装置の運転を行いながらできるものでもな
く、操作不良であるのか、機械的故障（ハードウエア的
故障）であるかを判断していない。よって、診断自体に
曖昧さがあると共に、修理に要する時間、つまり使用者
に対して被害を最小限にすることが充分考慮されていな
い。The above self-diagnosis method cannot be performed while operating the air conditioner, and determines whether the operation is defective or a mechanical failure (hardware failure). Not. Therefore, the diagnosis itself is ambiguous, and the time required for repair, that is, minimizing damage to the user, is not sufficiently considered.
【０００４】本発明の目的は、空気調和装置の故障に際
して原因を明確にし、運転持続可能な場合には運転を止
めないなどの、融通性の高い故障診断付き空気調和装置
を提供することにある。[0004] It is an object of the present invention to provide a highly versatile air conditioner with a failure diagnosis, such as clarifying the cause of an air conditioner failure and not stopping operation when operation is sustainable. .
【０００５】[0005]
【課題を解決するための手段】本発明による空気調和装
置は、空気調和装置の運転状態を表す状態量を常にある
いは任意の時刻に監視する手段と、状態量が変化したと
き操作不良であるか、空気調和装置の機械的故障なのか
を自己診断する手段と、操作不良と判断された場合には
正常の状態となるように治療制御を行う手段と、機械的
故障と判断された場合には停止処置動作を行う手段と、
操作不良あるいは機械的故障と判断されたことを表示す
る表示手段とを備えている。SUMMARY OF THE INVENTION An air conditioner according to the present invention includes means for constantly or at an arbitrary time monitoring a state quantity representing an operation state of an air conditioner, and whether an operation failure occurs when the state quantity changes. Means for self-diagnosis of a mechanical failure of the air conditioner, means for performing treatment control so as to be in a normal state when operation is determined to be defective, and Means for performing a stop treatment operation;
Display means for displaying that operation failure or mechanical failure has been determined.
【０００６】これにより故障が発生した際に、操作不良
であるか、ハードウェア故障であるかを自己診断し、さ
らに操作不良の場合には正規の状態と性能を発揮するよ
う自己治療し、故障による使用者への不快感を最低限に
し、常に安定で快適な多室空気調和機の運転を保証する
ことができる。また、万が一ハードウェア故障が発生し
ても、どこが悪いのかを的確に指摘し、修理時間を短縮
して使用者の不快感を少なくし、サービスマンへの負担
を低減することができる。Accordingly, when a failure occurs, a self-diagnosis is made as to whether the operation is defective or a hardware failure, and in the case of a defective operation, self-treatment is performed so as to exhibit a normal state and performance. Therefore, it is possible to minimize the discomfort to the user and to guarantee the stable and comfortable operation of the multi-room air conditioner at all times. Also, even if a hardware failure occurs, it is possible to accurately point out what is wrong, shorten the repair time, reduce the discomfort of the user, and reduce the burden on the service person.
【０００７】以上により空気調和装置の運転を行いなが
ら、操作不良あるいは機械的故障であるかが即座に使用
者、サービスマンあるいは設計者へ明確に伝えることが
できる。したがって、空気調和装置の故障に際し、使用
者への被害を最小限にすることができる。As described above, while operating the air conditioner, it is possible to immediately and clearly notify the user, the service person or the designer whether the operation is defective or a mechanical failure has occurred. Therefore, when the air conditioner fails, damage to the user can be minimized.
【０００８】また、本発明による故障診断付き空気調和
装置は、上記において状態量、及び機械的故障と判断さ
れてからの原因、異常状態、異常状態に対して施した対
策の情報を保管する情報保管装置を備えている。Further, the air conditioner with a failure diagnosis according to the present invention stores information on a state quantity, a cause after being determined as a mechanical failure, an abnormal state, and information on measures taken for the abnormal state. It has a storage device.
【０００９】さらに、本発明による故障診断付き空気調
和装置は、操作不良あるいは機械的故障と判断されたこ
とを空気調和装置の設置された場所に対して遠隔地にあ
るサービスセンタへ通信する手段を備えている。Further, the air conditioner with a failure diagnosis according to the present invention has a means for communicating to the service center located at a remote place with respect to the place where the air conditioner is installed that the malfunction or the mechanical failure has been determined. Have.
【００１０】さらに、本発明による空気調和装置は、空
気調和装置の運転状態を表す圧縮機冷媒吐出過熱度を監
視する手段を備え、室外膨張弁の開度に対する圧縮機の
冷媒吐出過熱度の感度を表す係数パラメータが予め求め
られた正常範囲以下に低下したとき、機械的故障と判断
している。Further, the air conditioner according to the present invention is provided with a means for monitoring a compressor refrigerant discharge superheat indicating an operation state of the air conditioner, and the sensitivity of the refrigerant discharge superheat of the compressor to the opening of the outdoor expansion valve. Is determined to be a mechanical failure when the coefficient parameter representing the value falls below a normal range obtained in advance.
【００１１】さらに、本発明による空気調和装置は、圧
縮機の冷媒吐出過熱度を正規分布を成す確率密度関数と
して捉え、予め定めた診断基準に対する確率密度関数か
ら診断時点の冷媒吐出過熱度の状態が異常であるか正常
であるか検定を行うこととしている。Further, the air conditioner according to the present invention captures the refrigerant discharge superheat degree of the compressor as a probability density function forming a normal distribution, and obtains the state of the refrigerant discharge superheat degree at the time of diagnosis from the probability density function with respect to a predetermined diagnostic criterion. The test is to determine whether or not is abnormal or normal.
【００１２】[0012]
【発明の実施の形態】以下、本発明の一実施の形態を、
故障診断法、通信方法、表示方法、情報入力方法、情報
保管方法の順で、図１ないし図５を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described.
The failure diagnosis method, the communication method, the display method, the information input method, and the information storage method will be described in this order with reference to FIGS.
【００１３】図２は、多室空気調和機と故障診断装置構
成を示すブロック図であり、室外機１７と、複数台の室
内機２５１、２５Ｎを有し、室外機１７と１台あるいは
複数台からなる室内機２５１、２５Ｎとを配管接続して
閉回路をなし、その閉回路の中に冷媒を封入している。FIG. 2 is a block diagram showing the configuration of a multi-room air conditioner and a failure diagnosis device. The multi-room air conditioner has an outdoor unit 17, a plurality of indoor units 251 and 25N, and the outdoor unit 17 and one or more units. And the indoor units 251 and 25N are connected by pipes to form a closed circuit, and a refrigerant is sealed in the closed circuit.
【００１４】室外機１７は、１台あるいは複数台の、周
波数可変あるいは固定の圧縮機１８と室外熱交換器１９
及び室外膨張弁２４を配管するとともに室外熱交換器１
９に送風する室外ファン２０を備えている。また、室内
機２５１、２５Ｎにおいては、室内空気と熱交換を行う
室内熱交換器２６１、２６Ｎとその室内熱交換器２５
１、２５Ｎの冷媒の流量を調節する室内膨張弁２８１、
２８Ｎを順次配管するとともに室内熱交換器２６１、２
６Ｎに送風する室内ファン２７１、２７Ｎが設けられて
いる。The outdoor unit 17 includes one or more variable frequency or fixed compressors 18 and an outdoor heat exchanger 19.
And piping the outdoor expansion valve 24 and the outdoor heat exchanger 1
An outdoor fan 20 that blows air to the fan 9 is provided. In the indoor units 251 and 25N, the indoor heat exchangers 261 and 26N that exchange heat with indoor air and the indoor heat exchangers 25
An indoor expansion valve 281, which regulates the flow rate of 1,25N refrigerant;
28N, and heat exchangers 261, 2
Indoor fans 271 and 27N that blow air to 6N are provided.
【００１５】室外機１７は、アキュムレータ２１、四方
弁２２及びレシーバ２３を有し、室外機１７及び室内機
２５１、２５Ｎの各ガス側及び液側を、各々ガス側管路
２９、液側管路３０及び分岐管３１１、３１Ｎで接続し
て閉回路となし、その閉回路の中に冷媒が封入してあ
る。◆また、室内機２５１、２５Ｎは、空気調和の対象
となる部屋などの内部である利用部３２１、３２Ｎに、
それぞれ配置してある。The outdoor unit 17 has an accumulator 21, a four-way valve 22 and a receiver 23, and connects the gas side and the liquid side of the outdoor unit 17 and the indoor units 251 and 25N to a gas side line 29, a liquid side line, respectively. 30 and the branch pipes 311 and 31N are connected to form a closed circuit, and a refrigerant is sealed in the closed circuit. ◆ In addition, the indoor units 251 and 25N are connected to the use units 321 and 32N inside a room or the like to be air-conditioned.
Each is arranged.
【００１６】さらに、室外機１７には、室外温度を検知
する室外温度検知器３３、圧縮機冷媒吐出温度検知器及
び冷媒過熱度演算器からなる圧縮機冷媒吐出過熱度検知
器３４、圧縮機冷媒吸入圧力を検知する圧縮機冷媒吸入
圧力検知器３５、圧縮機冷媒吐出圧力を検知する圧縮機
冷媒吐出圧力検知器３６、圧縮機１８の消費電力を検知
する圧縮機電力検知器３７、圧縮機１８の周波数を操作
するインバータ圧縮機周波数操作器３８、室外ファン２
０の送風能力を操作する室外側送風能力操作器３９、室
外ファン２０の消費電力を検知する室外ファン電力検知
器４０、室外膨張弁２４の開度を操作する室外膨張弁開
度操作器４１がそれぞれ設けられている。 さらに、室
内側となる利用部３２１、３２Ｎには、利用部室内温度
を検知する利用部室内温度検知器４２１、４２Ｎ、その
利用部への吹き出し空気温度を検知する利用部吹き出し
空気温度検知器４３１、４３Ｎ、室内ファン２７１、２
７Ｎの送風能力を操作する室内側送風能力操作器４４
１、４４Ｎ、室内ファン２７１、２７Ｎの電力を検知す
る室内ファン電力検知器４５１、４５Ｎ、室内膨張弁２
８１、２８Ｎの冷媒循環量を操作する室内膨張弁開度操
作器４６１、４６Ｎ、予め与えられた設定値を記憶ある
いは使用者が好みの熱環境を設定するための設定器４７
１、４７Ｎを有している。Further, the outdoor unit 17 includes an outdoor temperature detector 33 for detecting an outdoor temperature, a compressor refrigerant discharge superheat degree detector 34 comprising a compressor refrigerant discharge temperature detector and a refrigerant superheat degree calculator, a compressor refrigerant A compressor refrigerant suction pressure detector 35 for detecting suction pressure, a compressor refrigerant discharge pressure detector 36 for detecting compressor refrigerant discharge pressure, a compressor power detector 37 for detecting power consumption of the compressor 18, a compressor 18 Frequency controller 38 for controlling the compressor frequency, outdoor fan 2
An outdoor air blowing capacity controller 39 for controlling the air blowing capacity of 0, an outdoor fan power detector 40 for detecting the power consumption of the outdoor fan 20, and an outdoor expansion valve opening degree operating unit 41 for operating the opening degree of the outdoor expansion valve 24. Each is provided. Further, in the use units 321 and 32N on the indoor side, use unit room temperature detectors 421 and 42N for detecting the use unit room temperature and a use unit blowout air temperature detector 431 for detecting the temperature of the air blown out to the use unit. , 43N, indoor fans 271, 2
Indoor air blowing capacity controller 44 for controlling the blowing capacity of 7N
1, 44N, indoor fan power detectors 451, 45N for detecting the power of the indoor fans 271, 27N, and the indoor expansion valve 2
81, 28N, the indoor expansion valve opening degree controllers 461, 46N for controlling the refrigerant circulation amount, a setting unit 47 for storing a preset value or setting a desired thermal environment for the user.
1, 47N.
【００１７】さらに、通常の制御及びその他の演算を行
う制御演算装置４８、及び診断治療装置４９、使用者へ
の表示装置５０、情報保管装置５１、情報入力装置５
２、サービスマンあるいは設計者への表示装置５３、通
信手段５４がそれぞれ接続されている。以上で故障診断
装置は、空気調和機に付属させても良いし、取り外し可
能としても良い。Further, a control operation device 48 for performing normal control and other calculations, a diagnostic treatment device 49, a display device 50 for a user, an information storage device 51, and an information input device 5
2. A display device 53 for a serviceman or designer and a communication means 54 are connected to each other. As described above, the failure diagnosis device may be attached to the air conditioner, or may be removable.
【００１８】次に、本発明による多室空気調和機の動作
について説明する。◆初めに、室外膨張弁２４が、固渋
や駆動モータの空回りなどでハードウェアに支障をきた
したとする。◆このとき、圧縮機駆動周波数に対して室
外膨張弁開度が大きい場合、圧縮機冷媒吐出圧力Ｐｄが
やや小さくなり、圧縮機冷媒吐出温度Ｔｄは下降する。
逆に、圧縮機駆動周波数に対して室外膨張弁開度が小さ
い場合、圧縮機冷媒吐出圧力Ｐｄは大きくなるが、室外
膨張弁開度がさらに小さくなった場合、Ｐｄは低下し、
圧縮機冷媒吐出温度Ｔｄは上昇する。したがって、ハー
ドウェアの故障に関しては、単に、圧縮機冷媒吐出圧
力、圧縮機冷媒吐出温度などの状態量を観測しただけで
は、一定の傾向を見いだすことは困難となる。◆そこ
で、ハードウェアの故障に対しては、図１のフローチャ
ートでステップ４で示したシステム同定を用いる。シス
テム同定とは、ある状態変数と、他の状態変数の関係
を、動的挙動を観測することで、統計的に求める手法で
あり、以下に具体的に説明する。Next, the operation of the multi-room air conditioner according to the present invention will be described. At first, it is assumed that the outdoor expansion valve 24 has hindered the hardware due to hard traffic or idling of the drive motor. At this time, when the outdoor expansion valve opening is large with respect to the compressor drive frequency, the compressor refrigerant discharge pressure Pd becomes slightly smaller, and the compressor refrigerant discharge temperature Td decreases.
Conversely, when the outdoor expansion valve opening is small with respect to the compressor drive frequency, the compressor refrigerant discharge pressure Pd increases, but when the outdoor expansion valve opening further decreases, Pd decreases.
The compressor refrigerant discharge temperature Td increases. Therefore, regarding the hardware failure, it is difficult to find a certain tendency simply by observing the state quantities such as the compressor refrigerant discharge pressure and the compressor refrigerant discharge temperature. Therefore, for hardware failure, the system identification shown in step 4 in the flowchart of FIG. 1 is used. The system identification is a method of statistically obtaining a relationship between a certain state variable and another state variable by observing a dynamic behavior, and will be specifically described below.
【００１９】圧縮機冷媒吐出圧力検知器３６の検知信号
や、圧縮機冷媒吐出過熱度検知器３４の検知信号など
の、状態量の観測値を代表してｙ（ｋ）とする。ここで
ｋは、観測のステップ数である。また、室外膨張弁開度
操作器４１の操作信号などの、操作量を代表して、ｕ
（ｋ）とすると、これらの関係は、ＡＲＸモデルなどで
表すことができる。簡単のため、ここでは次数を１とす
ると下記数式で表される。The observed value of the state quantity, such as the detection signal of the compressor refrigerant discharge pressure detector 36 and the detection signal of the compressor refrigerant discharge superheat degree detector 34, is represented by y (k). Here, k is the number of observation steps. In addition, as an operation amount such as an operation signal of the outdoor expansion valve opening degree operation device 41, u
If (k), these relationships can be represented by an ARX model or the like. For simplicity, here, if the order is 1, it is expressed by the following equation.
【００２０】 ｙ（ｋ＋１）＝−Ａ１・ｙ（ｋ）＋Ｂ１・ｕ（ｋ） …（１）◆ 式（１）の係数の中で、Ａ１は、検知信号ｙ（ｋ）に対
する次のステップの検知信号ｙ（ｋ＋１）の係数であ
り、多室空気調和機自身の慣性の大きさを表す。係数パ
ラメータＢ１は、操作信号ｕ（ｋ）が多室空気調和機制
御演算装置４８から室外膨張弁開度操作器４１に送られ
た際に、圧縮機冷媒吐出過熱度検知器３４の検知信号ｙ
（ｋ）が如何に変化するかという、操作信号と検知信号
間の感度を表す。この係数パラメータを、多室空気調和
機を運転しながら同定することによって求める。Y (k + 1) = − A1 · y (k) + B1 · u (k) (1) ◆ In the coefficient of the equation (1), A1 is the next step with respect to the detection signal y (k). It is a coefficient of the detection signal y (k + 1) and represents the magnitude of inertia of the multi-room air conditioner itself. The coefficient parameter B1 is a detection signal y of the compressor refrigerant discharge superheat degree detector 34 when the operation signal u (k) is sent from the multi-room air conditioner control operation device 48 to the outdoor expansion valve opening degree operation device 41.
It represents the sensitivity between the operation signal and the detection signal, which indicates how (k) changes. This coefficient parameter is obtained by identifying the multi-room air conditioner while operating it.
【００２１】以上で得られた係数Ｂ１は、室外膨張弁の
固渋や駆動モータ空回りなどのハードウェア故障の際に
は、その値が減少する。つまり、操作信号を送ったにも
係わらず、実際には室外膨張弁が作動していないので、
操作信号の大きさに対して、検知信号が殆ど変化せず、
操作信号と検知信号の感度があたかも減少したように計
算されるからである。◆ここで、係数の正常な値、ある
いは正常な値の範囲が既知であれば、その範囲から逸脱
した時点で、ハードウェアに支障をきたしたと判断でき
る。The coefficient B1 obtained as described above decreases in the event of a hardware failure, such as a hardened outdoor expansion valve or the idling of the drive motor. In other words, despite sending the operation signal, the outdoor expansion valve is not actually operating,
The detection signal hardly changes with respect to the magnitude of the operation signal,
This is because the sensitivity of the operation signal and the detection signal is calculated as if it were reduced. Here, if the normal value of the coefficient or the range of the normal value is known, it can be determined that the hardware has been hindered when the coefficient deviates from the range.
【００２２】図４は、上記の説明によるハードウェアの
診断を行うシミュレーションを表し、係数の同定の様子
を示している。◆観測している同定ステップｎＢにおい
て、室外膨張弁などのアクチュエータが働かなくなった
とする。そのとき、ステップｎＤ以上においては、係数
パラメータＢ１が正常範囲（７２）以下に低下し、ハー
ドウェアが故障したことが分かり、さらには、圧縮機冷
媒吐出過熱度と室外膨張弁開度間の係数パラメータの値
が異常であることから、室外膨張弁の故障と的確に診断
して決定できる。◆このとき、故障が生じてからそれを
診断するまでに、（ｎＤ−ｎＢ）ステップの時間差を生
じるが、これはステップ４の同定アルゴリズムに、忘却
係数などとして重み係数を付加することによって等価的
に小さくすることができる。FIG. 4 shows a simulation for diagnosing hardware according to the above description, and shows how coefficients are identified. ◆ Assume that the actuator such as the outdoor expansion valve does not work in the identification step nB being observed. At that time, above step nD, the coefficient parameter B1 dropped below the normal range (72), indicating that the hardware failed, and furthermore, the coefficient between the compressor refrigerant discharge superheat degree and the outdoor expansion valve opening degree. Since the value of the parameter is abnormal, it can be accurately diagnosed and determined as a failure of the outdoor expansion valve. At this time, a time difference of (nD-nB) steps occurs between the occurrence of the failure and the diagnosis of the failure, which is equivalent to the identification algorithm of step 4 by adding a weight coefficient as a forgetting coefficient or the like. Can be made smaller.
【００２３】次に、操作不良の故障診断についての例を
挙げて説明する。上述と同様に室外膨張弁を例として述
べる。Next, a description will be given of an example of failure diagnosis of an operation failure. An outdoor expansion valve will be described as an example similarly to the above.
【００２４】今、制御アルゴリズムの不備によって、あ
るいは予想外の大きな外乱が多室空気調和機制御システ
ムに付加され、室外膨張弁が不適切な動作を行ったと仮
定する。この場合、圧縮機駆動周波数に対して室外膨張
弁開度が小さすぎると、圧縮機冷媒吐出過熱度が上昇す
る。このとき、従来は過上昇アラームの表示と共に運転
を中止することになる。It is now assumed that a control algorithm is defective or an unexpectedly large disturbance is added to the multi-room air conditioner control system, and that the outdoor expansion valve has performed improperly. In this case, if the outdoor expansion valve opening is too small with respect to the compressor drive frequency, the compressor refrigerant discharge superheat increases. At this time, conventionally, the operation is stopped together with the display of the excessive rise alarm.
【００２５】本発明による診断は、図１のステップ６に
示すように検定を利用する。検定とは、（Ａ）ある基準
を定めて（Ｂ）検査し、（Ｃ）合否、等級などを決定す
るときに、統計的な処理より決定することであり、以下
に具体的に説明する。◆いま、（Ａ）圧縮冷媒吐出過熱
度の制御目標値が３０Ｋ、異常の診断基準が４５Ｋのと
き、（Ｂ）検知信号に対して（Ｃ）それが正常か異常か
を判断することとして説明する。The diagnosis according to the present invention utilizes an assay as shown in step 6 of FIG. The test means that (A) a certain standard is determined, (B) inspection is performed, and (C) pass / fail, grade and the like are determined by a statistical process, which will be specifically described below. Now, (A) when the control target value of the superheat degree of the compressed refrigerant discharge is 30K and when the diagnostic reference of the abnormality is 45K, it is explained that (B) the detection signal is judged (C) whether it is normal or abnormal. I do.
【００２６】圧縮機冷媒吐出過熱度検知器３４の検知信
号を受け取ったとき、その検知信号は、圧縮機冷媒吐出
過熱度と室外膨張弁開度を（１）式に近似化したときの
近似誤差、測定誤差や電気ノイズなどの観測雑音によ
り、不規則変動をする確率的なものと考えられる。よっ
て、検知信号を確定的なものとして、１００％信頼でき
るものではない。そこで、この確率変数といえる検知信
号を検定するための処理として、次の仮説を定める。◆ 仮説Ｈ０：圧縮機冷媒吐出過熱度は正常である。◆ 仮説Ｈ１：圧縮機冷媒吐出過熱度は異常である。◆ 図５において、検知信号が境界値ｙＢを境に、領域Ｒ０
に入った際には、仮説Ｈ０を受容し、領域Ｒ１に入った
際に、仮説Ｈ１を受容する。When the detection signal of the compressor refrigerant discharge superheat degree detector 34 is received, the detection signal indicates an approximation error when the compressor refrigerant discharge superheat degree and the outdoor expansion valve opening degree are approximated by the equation (1). It is probable that irregular fluctuations occur due to observation noises such as measurement errors and electric noises. Therefore, the detection signal is not 100% reliable as a deterministic signal. Therefore, the following hypothesis is defined as a process for testing the detection signal which can be said to be a random variable. ◆ Hypothesis H0: The compressor refrigerant discharge superheat degree is normal. ◆ Hypothesis H1: The compressor refrigerant discharge superheat degree is abnormal. ◆ In FIG. 5, the detection signal is divided into a region R0 and a boundary value yB.
When entering, the hypothesis H0 is accepted, and when entering the region R1, the hypothesis H1 is accepted.
【００２７】７５は、圧縮機冷媒吐出過熱度が正常値で
あるという条件のもとでの検知信号の条件付確率密度関
数でありｐ（ｙ｜３０）、７６は圧縮機冷媒吐出過熱度
が異常値であるという条件のもとでの検知信号の条件付
確率密度関数でありｐ（ｙ｜４５）で表すこととする。
◆従って面積Ｅ０は、圧縮機冷媒吐出過熱度が３０Ｋで
あるにもかかわらず、仮説Ｈ１を受容し、圧縮機吐出過
熱度は異常であるという決定を下す確率であり、第１種
の過誤である。Numeral 75 is a conditional probability density function of the detection signal under the condition that the compressor refrigerant discharge superheat is a normal value, p (y | 30), and 76 is the compressor refrigerant discharge superheat. It is a conditional probability density function of a detection signal under the condition of an abnormal value, and is represented by p (y | 45).
Therefore, the area E0 is the probability of accepting the hypothesis H1 and determining that the compressor discharge superheat is abnormal even though the compressor refrigerant discharge superheat is 30K. is there.
【００２８】また、面積Ｅ１は、圧縮機吐出過熱度が４
５Ｋであるにもかかわらず、仮説Ｈ０を受容し、圧縮機
冷媒吐出過熱度は正常であるという決定を下す確率であ
り、第２種の過誤となる。◆さらに、これら２つの確率
密度関数は既知とし、一般的には正規分布と考えて差し
支えない。よって、検定することは境界値ｙＢを求める
ことに帰着される。The area E1 is such that the superheat degree of the compressor discharge is 4
Despite being 5K, this is the probability of accepting hypothesis H0 and making a determination that compressor refrigerant discharge superheat is normal and is a second type of error. ◆ Furthermore, these two probability density functions are known, and may be generally considered as a normal distribution. Therefore, the test results in obtaining the boundary value yB.
【００２９】上記の２種類の過ちを犯したときに、それ
ぞれ損害高を決めておく。Ｅ０を犯したときの損害をＣ
０、Ｅ１を犯したときの損害をＣ１とする。また、もし
圧縮機冷媒吐出過熱度が異常となる確率βが先験的に分
かっていれば、それも利用し、損害高の総和である全平
均危険高を下式（２）のように定義する。◆ Ｃ（ｙＢ）＝（１−β）・Ｃ０・Ｅ０＋β・Ｃ１・Ｅ１ …（２）◆ 上記数式を最小にするように境界値ｙＢを定める。それ
はｄＣ（ｙＢ）／ｄｙＢ＝０を計算すれば良く、具体的
にｄＣ（ｙＢ）／ｄｙＢ＝０を満足する条件は下式
（３）で与えられる。When the above two types of mistakes are committed, the damage amount is determined. The damage when committing E0 is C
0, the damage when committing E1 is C1. Also, if the probability β that the compressor refrigerant discharge superheat degree becomes abnormal is known a priori, it is also used, and the total average risk height, which is the sum of the damage amounts, is defined as the following equation (2). I do. ◆ C (yB) = (1−β) · C0 · E0 + β · C1 · E1 (2) ◆ Determine the boundary value yB so as to minimize the above equation. It suffices to calculate dC (yB) / dyB = 0. Specifically, the condition that satisfies dC (yB) / dyB = 0 is given by the following equation (3).
【００３０】 ｐ（ｙ｜４５）／ｐ（ｙ｜３０）＝β・Ｃ１／（１−β）Ｃ０ …（３）◆ 上式（３）で左辺の条件付確率密度関数の比は尤度比で
あり、右辺の値は閾値である。尤度比が閾値を超えたと
き仮説Ｈ１を受容して、圧縮機吐出過熱度は異常である
と決定し、閾値以下であるならば、圧縮機吐出過熱度は
正常と決定する。 実際には、圧縮機冷媒吐出過熱度は
動特性を持ち、検知信号ｙ（ｋ）は、時刻と共に変動
し、正常、異常状態も３０Ｋ、４５Ｋとなるような単純
な事態ではない。しかし、確率微分、確率積分、伊藤の
微分則を用いれば上記と同様に決定することができる。
◆以上述べたように現在の検知信号からの状態を正常値
に対して検定することによって、操作不良の故障診断を
行うことができる。P (y | 45) / p (y | 30) = β · C1 / (1−β) C0 (3) ◆ In the above equation (3), the ratio of the conditional probability density function on the left side is likelihood. Ratio, and the value on the right side is a threshold. When the likelihood ratio exceeds the threshold, the hypothesis H1 is accepted, the compressor discharge superheat is determined to be abnormal, and if it is less than the threshold, the compressor discharge superheat is determined to be normal. Actually, the degree of superheat of the compressor refrigerant discharge has a dynamic characteristic, the detection signal y (k) fluctuates with time, and the normal and abnormal states are not 30K and 45K. However, it can be determined in the same manner as described above by using probability differentiation, probability integration, and Ito's differentiation rule.
As described above, a fault diagnosis of an operation failure can be performed by testing the state from the current detection signal against a normal value.
【００３１】つぎに、操作不良と診断した後、その原因
を決定することを説明する。原因を明らかにするにはハ
ードウェアの故障の場合と異なり、係数パラメータの低
下のように明確に箇所を決定できないので、図１の手続
き１３、１４に示したように過去故障事例を参照する。Next, a description will be given of how to determine the cause after diagnosing an operation failure. In order to clarify the cause, unlike the case of a hardware failure, the location cannot be clearly determined as in the case of a decrease in the coefficient parameter. Therefore, the past failure cases are referred to as shown in procedures 13 and 14 in FIG.
【００３２】まず、情報保管装置５１より、診断治療装
置４９に過去故障事例をダウンロードし、事例を一つ一
つ参照していく。過去故障事例には検知手段毎に過去の
故障事例の原因をまとめてあり、Ｔｒｕｅ、Ｆａｌｓｅ
判断により、原因を決定することができる。図３は、図
１におけるステップ１４の具体例であり、圧縮機冷媒吐
出過熱度異常時の原因決定フローである。詳細な説明は
図示の通りであるが、ステップ５５からスッテプ６８の
ように順次判定していくことにより、原因を確定するこ
とができる。◆原因を確定した後は、自己治療が可能な
場合にはアラームを表示し、停止する従来の制御に代わ
って治療制御に移行する。First, past failure cases are downloaded from the information storage device 51 to the diagnostic treatment device 49, and the cases are referred to one by one. In the past failure case, the cause of the past failure case is summarized for each detecting means. True, False
By the judgment, the cause can be determined. FIG. 3 is a specific example of step 14 in FIG. 1 and is a flow of determining the cause when the compressor refrigerant discharge superheat is abnormal. Although the detailed description is as shown in the figure, the cause can be determined by sequentially determining from step 55 to step 68. ◆ After determining the cause, if self-treatment is possible, an alarm is displayed, and the control shifts to treatment control instead of the conventional control of stopping.
【００３３】治療制御とは、多室空気調和機の負荷が小
さくなる方向に操作手段を操作して、一時的に性能、能
力を犠牲にし、その後正常状態に復帰させることを意味
している。例えば、室外膨張弁を圧縮機吐出過熱度の許
容範囲内で全開し、室内膨張弁開度も同様に全開、圧縮
機駆動周波数は最低回転数として負荷を小さくしてい
く。但し、これはどの操作器が操作不良となっているか
で、その内容は当然異なる。The treatment control means that the operating means is operated in a direction in which the load of the multi-room air conditioner is reduced, temporarily sacrificing the performance and ability, and thereafter returning to the normal state. For example, the outdoor expansion valve is fully opened within the allowable range of the compressor discharge superheat, the indoor expansion valve is also fully opened, and the compressor drive frequency is set to the minimum rotation speed to reduce the load. However, this differs depending on which operating device is malfunctioning, and the content is naturally different.
【００３４】以上の故障診断を行なった後、故障機の使
用者名、設置地域、設置場所、ハードウェア故障、操作
不良による異常状態などの故障状態、故障部品、故障回
数などの内容を、通信手段５４を介して表示装置５０、
５３に表示する。After performing the above fault diagnosis, the user name of the faulty machine, the installation area, the installation location, the hardware status, the fault status such as the abnormal status due to the operation failure, the fault parts, and the contents such as the number of faults are communicated. The display device 50 via the means 54,
Display at 53.
【００３５】表示装置は使用者元ないしはサービスセン
タ、製造工場に設置することが望ましく、ハードウェア
故障など自己治療できない場合、治療制御では完治しな
かった際には、サービスマンが早急に現場へ駆け付け、
最善の処置をとることができる。さらに、情報入力装置
５２を用いて情報保管装置５１に原因、異常状態、対策
法などを入力することによって、これらの情報はその後
の故障診断に用いることができる。The display device is desirably installed at a user, a service center, or a manufacturing factory. If self-medication cannot be performed due to a hardware failure or the like, and treatment control is not complete, a serviceman immediately rushes to the site. ,
The best action can be taken. Further, by inputting a cause, an abnormal state, a countermeasure, and the like to the information storage device 51 using the information input device 52, such information can be used for a subsequent failure diagnosis.
【００３６】以上の例では、圧縮機冷媒吐出過熱度につ
いて説明を行ったが、その他冷媒封入量過多、過小、圧
縮機軸受け磨耗などの様々な故障条件にも同様のことを
行うことができる。In the above example, the superheat degree of the discharge of the compressor refrigerant has been described. However, the same can be applied to various other failure conditions such as an excessively large or small amount of the charged refrigerant and a worn bearing of the compressor.
【００３７】[0037]
【発明の効果】以上述べたように本発明によれば、空気
調和装置の故障に際して故障診断を行い原因を明確に
し、運転持続可能な場合には運転を止めないなどの、融
通性の高い故障診断付き空気調和装置を得ることができ
る。As described above, according to the present invention, when an air conditioner fails, a failure diagnosis is performed to clarify the cause, and if the operation is sustainable, the operation is not stopped. An air conditioner with a diagnosis can be obtained.
【００３８】さらに、多室空気調和機がハードウェアに
支障をきたした際には、その箇所を明確に指摘し、サー
ビスマンに早急に伝えることにより、修理までの時間を
最短にできる。さらに、不良操作に対しては、原因の明
確化と共に自己治療できるものに対しては治療制御を行
うことにより、使用者の不快感を最低限にし、サービス
マンへの負担を軽減することができる。Further, when the multi-room air conditioner has a problem with the hardware, the time until the repair can be minimized by clearly pointing out the location and notifying the service person immediately. Furthermore, by performing treatment control for malfunctions that can be self-treated together with clarifying the cause, the discomfort of the user can be minimized, and the burden on service personnel can be reduced. .
【図１】 一実施の形態による主要部のフローチャート
図である。FIG. 1 is a flowchart of a main part according to an embodiment.
【図２】 一実施の形態の構成を表すブロック図であ
る。FIG. 2 is a block diagram illustrating a configuration of an embodiment.
【図３】 図１におけるステップ１４の詳細な判定方法
を示すフローチャート図である。FIG. 3 is a flowchart illustrating a detailed determination method of step 14 in FIG. 1;
【図４】 室外膨張弁が故障した際の、圧縮機冷媒吐出
過熱度と室外膨張弁間の係数パラメータの時間（ステッ
プ）に対する変化を示すグラフ線図である。FIG. 4 is a graph showing changes with time (steps) of a coefficient parameter between the compressor refrigerant discharge and the outdoor expansion valve when the outdoor expansion valve fails.
【図５】 横軸に検知信号の大きさ、縦軸にその度数で
ある確率密度関数を表すグラフ線図である。FIG. 5 is a graph showing the magnitude of the detection signal on the horizontal axis, and the probability density function as the frequency on the vertical axis.
１…運転開始信号入力部、２…多室空気調和機運転開始
部、３…観測部、４…システム同定部、５…係数パラメ
ータ判定部、６…検定部、７…状態判定部、８…通常制
御部、９…表示部１、１０…通信部、１１…表示部２、
１２…アラーム停止部、１３…過去故障事例ダウンロー
ド部、１４…操作不良原因判定部、１５…自己治療可不
可判定部、１６…治療制御部、１７…室外機、１８…圧
縮機、１９…室外熱交換器、２０…室外ファン、２１…
アキュムレータ、２２…四方弁、２３…レシーバ、２４
…室外膨張弁、２５１…室内機、２５Ｎ…室内機、２６
１…室内熱交換器、２６Ｎ…室内熱交換器、２７１…室
内ファン、２７Ｎ…室内ファン、２８１…室内膨張弁、
２８Ｎ…室内膨張弁、２９…ガス管、３０…液管、３１
１…分岐管、３１Ｎ…分岐管、３２１…利用部、３２Ｎ
…利用部、３３…室外温度検知器、３４…圧縮機冷媒吐
出過熱度検知器、３５…圧縮機冷媒吸入圧力検知器、３
６…圧縮機冷媒吐出圧力検知器、３７…圧縮起電力検知
器、３８…インバータ圧縮機操作器、３９…室外側送風
能力操作器、４０…室外ファン電力検知器、４１…室外
膨張弁開度操作器、４２１…室内温度検知器、４２Ｎ…
室内温度検知器、４３１…吹き出し空気温度検知器、４
３Ｎ…吹き出し空気温度検知器、４４１…室内側送風能
力操作器、４４Ｎ…室内側送風能力操作器、４５１…室
内ファン電力検知器、４５Ｎ…室内ファン電力検知器、
４６１…室内膨張弁開度操作器、４６Ｎ…室内膨張弁開
度操作器、４７１…設定器、４７Ｎ…設定器、４８…制
御演算装置、４９…診断治療装置、５０…使用者側表示
装置、５１…情報保管装置、５２…情報入力装置、５３
…表示装置、５４…通信手段、５５…サーミスタ故障判
定部、５６…サーミスタ故障決定部、５７…冷房暖房判
定部、５８…プリント板判定部、５９…プリント板異常
決定部、６０…プリント板判定部、６１…プリント板異
常決定部、６２…室内膨張弁開度判定部、６３…空調負
荷異常決定部、６４…室外膨張弁開度判定部、６５…室
外空調負荷異常決定部、６６…冷媒量判定部、６７…封
入冷媒量異常決定部、６８…膨張弁故障決定部、６９…
自己治療可能決定部、７０…自己治療不可能決定部、７
１…パラメータ同定値、７２…パラメータ正常範囲部、
７３…正常判定領域、７４…異常判定領域、７５…圧縮
機冷媒吐出過熱度正常条件付確率密度関数、７６…圧縮
機冷媒吐出過熱度異常条件付確率密度関数、７７…第２
種過誤確率、７８…第１種過誤確率。DESCRIPTION OF SYMBOLS 1 ... Operation start signal input part, 2 ... Multi-room air conditioner operation start part, 3 ... Observation part, 4 ... System identification part, 5 ... Coefficient parameter judgment part, 6 ... Test part, 7 ... State judgment part, 8 ... Normal control unit, 9 display unit 1, 10 communication unit, 11 display unit 2,
12: alarm stop unit, 13: past failure case download unit, 14: operation failure cause determination unit, 15: self-treatment possible / impossible determination unit, 16: treatment control unit, 17: outdoor unit, 18: compressor, 19: outdoor Heat exchanger, 20 ... outdoor fan, 21 ...
Accumulator, 22: Four-way valve, 23: Receiver, 24
... outdoor expansion valve, 251 ... indoor unit, 25N ... indoor unit, 26
1: indoor heat exchanger, 26N: indoor heat exchanger, 271: indoor fan, 27N: indoor fan, 281: indoor expansion valve,
28N: indoor expansion valve, 29: gas pipe, 30: liquid pipe, 31
1 ... Branch pipe, 31N ... Branch pipe, 321 ... Utilization part, 32N
... Utilization part, 33 ... Outdoor temperature detector, 34 ... Compressor refrigerant discharge superheat degree detector, 35 ... Compressor refrigerant suction pressure detector, 3
6 ... Compressor refrigerant discharge pressure detector, 37 ... Compression electromotive force detector, 38 ... Inverter compressor operation device, 39 ... Outdoor air blowing capacity operation device, 40 ... Outdoor fan power detector, 41 ... Outdoor expansion valve opening Operating device, 421 ... indoor temperature detector, 42N ...
Indoor temperature detector, 431 ... blow-out air temperature detector, 4
3N: blow-out air temperature detector, 441: indoor-side blowing capacity operation device, 44N: indoor-side blowing capacity operation device, 451: indoor fan power detector, 45N: indoor fan power detector,
461: Indoor expansion valve opening operation device, 46N: Indoor expansion valve opening operation device, 471: Setting device, 47N: Setting device, 48: Control operation device, 49: Diagnostic treatment device, 50: User side display device 51: information storage device, 52: information input device, 53
... Display device, 54 ... Communication means, 55 ... Thermistor failure determination section, 56 ... Thermistor failure determination section, 57 ... Cooling / heating determination section, 58 ... Printed board determination section, 59 ... Printed board abnormality determination section, 60 ... Printed board determination Unit, 61: printed board abnormality determination unit, 62: indoor expansion valve opening degree determination unit, 63: air conditioning load abnormality determination unit, 64: outdoor expansion valve opening degree determination unit, 65: outdoor air conditioning load abnormality determination unit, 66 ... refrigerant Amount judging section, 67 ... refrigerant circulating amount abnormality determining section, 68 ... expansion valve malfunction determining section, 69
Self-treatment possible determination unit, 70… Self-treatment impossible determination unit, 7
1 ... parameter identification value, 72 ... parameter normal range part,
73: Normal determination area, 74: Abnormal determination area, 75: Compressor refrigerant discharge superheat degree normal conditional probability density function, 76: Compressor refrigerant discharge superheat degree abnormal conditional probability density function, 77: Second
Species error probability, 78...
Claims (5)
器、及び室外膨張弁を配管接続するとともに室外ファン
を有する空気調和装置において、 前記空気調和装置の運転状態を表す状態量を常にあるい
は任意の時刻に監視する手段と、 前記状態量が変化したとき操作不良であるか、前記空気
調和装置の機械的故障なのかを自己診断する手段と、 操作不良と判断された場合には正常の状態となるように
治療制御を行う手段と、 機械的故障と判断された場合
には停止処置動作を行う手段と、 操作不良あるいは機械的故障と判断されたことを表示す
る表示手段とを備えたことを特徴とする故障診断付き空
気調和装置。1. An air conditioner having an outdoor fan connected to an outdoor unit, an indoor unit, a compressor, an outdoor heat exchanger, and an outdoor expansion valve by piping, wherein a state quantity representing an operation state of the air conditioner is always set. Alternatively, means for monitoring at an arbitrary time; means for self-diagnosis of operation failure when the state quantity changes or mechanical failure of the air conditioner; normal if operation failure is determined Means for performing treatment control so as to be in the state described above, means for performing a stop action operation when it is determined that a mechanical failure has occurred, and display means for displaying that operation failure or mechanical failure has been determined. An air conditioner with a failure diagnosis.
量、及び機械的故障と判断されてからの原因、異常状
態、異常状態に対して施した対策の情報を保管する情報
保管装置を備えたことを特徴とする故障診断付き空気調
和装置。2. An apparatus according to claim 1, further comprising an information storage device for storing information on the state quantity, a cause after being determined to be a mechanical failure, an abnormal state, and measures taken for the abnormal state. An air conditioner with a failure diagnosis.
あるいは機械的故障と判断されたことを空気調和装置の
設置された場所に対して遠隔地にあるサービスセンタへ
通信する手段を備えたことを特徴とする故障診断付き空
気調和装置。3. The apparatus according to claim 1, further comprising means for communicating that the operation is determined to be malfunctioning or mechanical failure to a service center located at a place remote from the place where the air conditioner is installed. An air conditioner with a failure diagnosis.
器、及び室外膨張弁を配管接続するとともに室外ファン
を有する空気調和装置において、 前記空気調和装置の運転状態を表す前記圧縮機冷媒吐出
過熱度を監視する手段を備え、 前記室外膨張弁の開度に対する前記圧縮機の冷媒吐出過
熱度の感度を表す係数が予め求められた正常範囲以下に
低下したとき、機械的故障と判断することを特徴とする
故障診断付き空気調和装置。4. An air conditioner having an outdoor fan connected to an outdoor unit, an indoor unit, a compressor, an outdoor heat exchanger, and an outdoor expansion valve by piping, wherein the compressor refrigerant indicating an operation state of the air conditioner. Means for monitoring the degree of discharge superheat, when a coefficient representing the sensitivity of the refrigerant discharge superheat of the compressor to the degree of opening of the outdoor expansion valve falls below a predetermined normal range, it is determined that a mechanical failure has occurred. An air conditioner with a failure diagnosis.
器、及び室外膨張弁を配管接続するとともに室外ファン
を有する空気調和装置において、 前記圧縮機の冷媒吐出過熱度を正規分布を成す確率密度
関数として捉え、予め定めた診断基準に対する確率密度
関数から診断時点の冷媒吐出過熱度の状態が異常である
か正常であるか検定を行うことを特徴とする故障診断付
き空気調和装置。5. An air conditioner having an outdoor fan connected to an outdoor unit, an indoor unit, a compressor, an outdoor heat exchanger, and an outdoor expansion valve by piping, wherein the refrigerant discharge superheat degree of the compressor has a normal distribution. An air conditioner with a failure diagnosis, characterized as a probability density function, which tests whether the state of refrigerant superheat at the time of diagnosis is abnormal or normal from a probability density function with respect to a predetermined diagnostic criterion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17457496A JP3491449B2 (en) | 1996-07-04 | 1996-07-04 | Air conditioner with fault diagnosis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17457496A JP3491449B2 (en) | 1996-07-04 | 1996-07-04 | Air conditioner with fault diagnosis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1019427A true JPH1019427A (en) | 1998-01-23 |
| JP3491449B2 JP3491449B2 (en) | 2004-01-26 |
Family
ID=15980945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17457496A Expired - Fee Related JP3491449B2 (en) | 1996-07-04 | 1996-07-04 | Air conditioner with fault diagnosis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3491449B2 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002081809A (en) * | 2000-09-01 | 2002-03-22 | Mitsubishi Electric Building Techno Service Co Ltd | Cold remote monitoring device with trouble diagnosis function |
| JP2004085088A (en) * | 2002-08-27 | 2004-03-18 | Daikin Ind Ltd | Failure diagnostic device and failure diagnostic method |
| JP2005308419A (en) * | 2004-04-16 | 2005-11-04 | Mitsubishi Heavy Ind Ltd | Condition detector for radiation substance container |
| JP2006284074A (en) * | 2005-03-31 | 2006-10-19 | Sanyo Electric Co Ltd | Control device of cooling device |
| KR100677264B1 (en) | 2005-02-15 | 2007-02-02 | 엘지전자 주식회사 | Error detecting method of compressor for multi air-conditioner and error detecting apparatus thereof |
| CN1330973C (en) * | 2004-12-30 | 2007-08-08 | 南京化工职业技术学院 | Experimental installation for failure diagnosis of air conditioner control circuit |
| CN100340819C (en) * | 2004-06-25 | 2007-10-03 | 三星电子株式会社 | Multiple air conditioner system and operation of its indoor units |
| JP2009002650A (en) * | 2008-10-06 | 2009-01-08 | Daikin Ind Ltd | Abnormality diagnosis system |
| KR20110074106A (en) * | 2009-12-24 | 2011-06-30 | 엘지전자 주식회사 | Air conditioner and control process of the same |
| JP2011163576A (en) * | 2010-02-04 | 2011-08-25 | Toenec Corp | Malfunction detecting device of total enthalpy heat exchanger and peripheral equipment in air conditioning system |
| CN104534759A (en) * | 2014-12-11 | 2015-04-22 | 广东芬尼克兹节能设备有限公司 | Exhausting assisted method for controlling electronic expansion valve |
| JP2015132439A (en) * | 2014-01-15 | 2015-07-23 | 株式会社日立ビルシステム | Equipment diagnostic apparatus, equipment diagnostic method, and equipment diagnostic program |
| JP2020091079A (en) * | 2018-12-06 | 2020-06-11 | 三菱電機株式会社 | Air conditioning system |
| JP2020153563A (en) * | 2019-03-19 | 2020-09-24 | ダイキン工業株式会社 | Device evaluation system and device evaluation method |
| CN114413410A (en) * | 2022-03-11 | 2022-04-29 | 青岛海信日立空调***有限公司 | Fault-tolerant control method for refrigerant improper charging of multi-split air-conditioning system and multi-split air-conditioning system |
| CN114427735A (en) * | 2022-02-14 | 2022-05-03 | 珠海格力电器股份有限公司 | Air conditioner control method, control device and nonvolatile storage medium |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03247960A (en) * | 1990-02-23 | 1991-11-06 | Daikin Ind Ltd | Degree of overheat control device for compressor |
| JPH03118481U (en) * | 1990-03-20 | 1991-12-06 | ||
| JPH04222349A (en) * | 1990-12-21 | 1992-08-12 | Daikin Ind Ltd | Operation controller for freezer |
| JPH07103539A (en) * | 1993-10-04 | 1995-04-18 | Mitsubishi Electric Corp | Air-conditioner with self-diagnosis display device |
-
1996
- 1996-07-04 JP JP17457496A patent/JP3491449B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03247960A (en) * | 1990-02-23 | 1991-11-06 | Daikin Ind Ltd | Degree of overheat control device for compressor |
| JPH03118481U (en) * | 1990-03-20 | 1991-12-06 | ||
| JPH04222349A (en) * | 1990-12-21 | 1992-08-12 | Daikin Ind Ltd | Operation controller for freezer |
| JPH07103539A (en) * | 1993-10-04 | 1995-04-18 | Mitsubishi Electric Corp | Air-conditioner with self-diagnosis display device |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002081809A (en) * | 2000-09-01 | 2002-03-22 | Mitsubishi Electric Building Techno Service Co Ltd | Cold remote monitoring device with trouble diagnosis function |
| JP2004085088A (en) * | 2002-08-27 | 2004-03-18 | Daikin Ind Ltd | Failure diagnostic device and failure diagnostic method |
| JP2005308419A (en) * | 2004-04-16 | 2005-11-04 | Mitsubishi Heavy Ind Ltd | Condition detector for radiation substance container |
| CN100340819C (en) * | 2004-06-25 | 2007-10-03 | 三星电子株式会社 | Multiple air conditioner system and operation of its indoor units |
| CN1330973C (en) * | 2004-12-30 | 2007-08-08 | 南京化工职业技术学院 | Experimental installation for failure diagnosis of air conditioner control circuit |
| KR100677264B1 (en) | 2005-02-15 | 2007-02-02 | 엘지전자 주식회사 | Error detecting method of compressor for multi air-conditioner and error detecting apparatus thereof |
| JP2006284074A (en) * | 2005-03-31 | 2006-10-19 | Sanyo Electric Co Ltd | Control device of cooling device |
| JP2009002650A (en) * | 2008-10-06 | 2009-01-08 | Daikin Ind Ltd | Abnormality diagnosis system |
| KR20110074106A (en) * | 2009-12-24 | 2011-06-30 | 엘지전자 주식회사 | Air conditioner and control process of the same |
| JP2011163576A (en) * | 2010-02-04 | 2011-08-25 | Toenec Corp | Malfunction detecting device of total enthalpy heat exchanger and peripheral equipment in air conditioning system |
| JP2015132439A (en) * | 2014-01-15 | 2015-07-23 | 株式会社日立ビルシステム | Equipment diagnostic apparatus, equipment diagnostic method, and equipment diagnostic program |
| CN104534759A (en) * | 2014-12-11 | 2015-04-22 | 广东芬尼克兹节能设备有限公司 | Exhausting assisted method for controlling electronic expansion valve |
| JP2020091079A (en) * | 2018-12-06 | 2020-06-11 | 三菱電機株式会社 | Air conditioning system |
| WO2020115935A1 (en) * | 2018-12-06 | 2020-06-11 | 三菱電機株式会社 | Air conditioning system |
| JP2020153563A (en) * | 2019-03-19 | 2020-09-24 | ダイキン工業株式会社 | Device evaluation system and device evaluation method |
| CN114427735A (en) * | 2022-02-14 | 2022-05-03 | 珠海格力电器股份有限公司 | Air conditioner control method, control device and nonvolatile storage medium |
| CN114413410A (en) * | 2022-03-11 | 2022-04-29 | 青岛海信日立空调***有限公司 | Fault-tolerant control method for refrigerant improper charging of multi-split air-conditioning system and multi-split air-conditioning system |
| CN114413410B (en) * | 2022-03-11 | 2023-07-14 | 青岛海信日立空调***有限公司 | Multi-split air conditioner system |
| CN114811862A (en) * | 2022-03-31 | 2022-07-29 | 青岛海尔空调电子有限公司 | Refrigerant system, and control method and control device thereof |
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