JP2001227790A - Device for diagnosing fault of sensor of air conditioner - Google Patents
Device for diagnosing fault of sensor of air conditionerInfo
- Publication number
- JP2001227790A JP2001227790A JP2000040534A JP2000040534A JP2001227790A JP 2001227790 A JP2001227790 A JP 2001227790A JP 2000040534 A JP2000040534 A JP 2000040534A JP 2000040534 A JP2000040534 A JP 2000040534A JP 2001227790 A JP2001227790 A JP 2001227790A
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- Prior art keywords
- sensor
- failure diagnosis
- unit
- detected
- humidity
- Prior art date
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- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空気調和機のセン
サ故障診断装置に係わり、特に、湿度センサの故障を比
較的簡易に診断するための空気調和機のセンサ故障診断
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner sensor failure diagnosis apparatus, and more particularly to an air conditioner sensor failure diagnosis apparatus for relatively easily diagnosing a humidity sensor failure.
【０００２】[0002]
【従来の技術】空気調和機では、温度センサや湿度セン
サを備え、設定された温度や湿度と、温度センサや湿度
センサで検出される温度や湿度とを比較しながら、室内
の温度や湿度のコントロールを行い、快適性を保つよう
にして冷房、暖房、除湿などの運転を行う。従って、こ
れらのセンサが故障すると、正常な温度や湿度の制御が
できず、著しく快適性を損なう結果となっていた。従
来、これらの温度センサや湿度センサの故障は、運転
中、圧縮機を最大能力で運転しても室温や湿度が十分に
コントロールできない、などの現象が発生してから初め
て発見されるという場合が殆どであった。また、湿度セ
ンサについては、湿度の感覚は温度よりも感じ難いた
め、故障はなかなか発見しづらいという問題があった。
いずれのセンサの場合も、断線やショートのような極端
な故障の場合はたやすく発見が可能であったが、特性の
劣化については、なかなか発見しづらい、という問題が
あった。この問題を解決するために、運転の開始直後の
センサの検出値を監視し、所定の能力での運転に対し、
所定の値以上の変化がない場合をセンサ異常と判定する
方法が提案されているが、狭い部屋を空調運転する場合
は、センサの反応は早く、広い部屋を空調運転する場合
には、センサの反応は鈍いなどの環境条件で差があり、
このようなセンサの故障診断は不正確であった。これら
の環境条件に左右されない、比較的精度が高く、簡易な
センサの故障診断が可能なセンサ故障診断装置の出現が
望まれていた。2. Description of the Related Art An air conditioner is provided with a temperature sensor and a humidity sensor, and compares the set temperature and humidity with the temperature and humidity detected by the temperature sensor and the humidity sensor to determine the indoor temperature and humidity. Controls and performs operations such as cooling, heating, and dehumidification while maintaining comfort. Therefore, when these sensors fail, normal temperature and humidity cannot be controlled, resulting in a significant loss of comfort. Conventionally, failures of these temperature and humidity sensors may be discovered only after the occurrence of such a phenomenon that the room temperature and humidity cannot be sufficiently controlled even when the compressor is operated at the maximum capacity during operation. Almost. In addition, the humidity sensor has a problem that it is difficult to detect a failure because the sense of humidity is harder to sense than the temperature.
In any of the sensors, an extreme failure such as a disconnection or a short can be easily found, but there is a problem that it is difficult to find the deterioration of the characteristics. In order to solve this problem, the detection value of the sensor immediately after the start of operation is monitored, and for operation with a predetermined capacity,
A method of determining a sensor abnormality when there is no change greater than a predetermined value has been proposed.However, when air-conditioning operation is performed in a small room, the response of the sensor is fast. There is a difference in environmental conditions such as slow response,
Fault diagnosis of such sensors was inaccurate. There has been a demand for a sensor failure diagnostic device which is relatively insensitive to these environmental conditions, has relatively high accuracy, and is capable of performing simple sensor failure diagnosis.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記問題点に
鑑みなされたもので、温度センサや湿度センサ等の故障
診断が比較的精度が高く、簡易に診断可能な、故障診断
モードを備えた空気調和機のセンサ故障診断装置を提供
することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a failure diagnosis mode in which failure diagnosis of a temperature sensor, a humidity sensor, or the like is relatively high in accuracy and can be easily performed. An object of the present invention is to provide a sensor failure diagnosis device for an air conditioner.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記問題点を
解決するため、冷房、暖房、除湿、故障診断などの運転
モードの選択や設定値の入力を行う入力部と、室内の温
度を検出する温度センサや湿度を検出する湿度センサ等
のセンサと、同センサを加熱するための加熱部と、時間
を計時する計時部と、温度や湿度を記憶する記憶部と、
同記憶部に記憶された温度や湿度と前記センサが検出す
る温度や湿度の検出値との差を比較する比較部と、同比
較部の比較結果により故障かどうかの故障診断を行う故
障診断部と、同故障診断部の診断結果を表示する表示部
と、装置を制御する制御部とを備え、前記入力部が前記
故障診断モードを選択し、前記センサの故障診断を行う
故障診断時に、同故障診断の開始時に前記センサが検出
した検出値を前記記憶部に記憶し、前記加熱部を所定の
時間加熱させるとともに、所定の時間の経過後に前記セ
ンサが検出する検出値と前記記憶部に記憶する開始時の
検出値とを、前記比較部が比較し、前記センサで検出さ
れる検出値が所定の範囲にないと判定される場合、また
は、前記センサで検出される検出値が所定の条件に一致
すると判定される場合、前記故障診断部が、前記センサ
を異常と診断するとともに、診断結果を前記表示部に表
示する。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an input unit for selecting operation modes such as cooling, heating, dehumidification, and failure diagnosis, and inputting set values. A sensor such as a temperature sensor for detecting the humidity and a humidity sensor for detecting the humidity, a heating unit for heating the sensor, a timer for measuring time, and a storage unit for storing temperature and humidity,
A comparing unit that compares a difference between the temperature and humidity stored in the storage unit and a detected value of the temperature and humidity detected by the sensor, and a failure diagnosis unit that performs a failure diagnosis as to whether or not a failure has occurred based on the comparison result of the comparison unit A display unit that displays a diagnosis result of the failure diagnosis unit, and a control unit that controls the device, wherein the input unit selects the failure diagnosis mode and performs a failure diagnosis of the sensor. The detection value detected by the sensor at the start of the failure diagnosis is stored in the storage unit, the heating unit is heated for a predetermined time, and the detection value detected by the sensor after a predetermined time has elapsed and stored in the storage unit. The comparison unit compares the detection value at the start of the operation with the detection unit and determines that the detection value detected by the sensor is not in a predetermined range, or the detection value detected by the sensor is in a predetermined condition. Is determined to match If the fault diagnosis unit, as well as diagnosing the sensor abnormality, and displays the diagnosis result on the display unit.
【０００５】また、前記所定の条件を、前記センサで検
出する検出値が、前記センサの検出可能な上限値、下限
値またはその近傍に固定する場合とする。[0005] Further, it is assumed that the predetermined condition is that a detection value detected by the sensor is fixed to an upper limit value, a lower limit value, or a vicinity thereof that can be detected by the sensor.
【０００６】また、前記所定の条件を、前記加熱部によ
る加熱を停止し、所定の時間の経過以降、前記センサで
検出される検出値が、前記記憶部に記憶した故障診断の
開始時の検出値に復帰しないか、または故障診断の開始
時の検出値に復帰する傾向にない場合とする。[0006] Further, the predetermined condition is such that the heating by the heating unit is stopped, and after a lapse of a predetermined time, a detection value detected by the sensor is equal to a detection value at the start of the failure diagnosis stored in the storage unit. It is assumed that the value does not return to the original value or does not tend to return to the detected value at the start of the failure diagnosis.
【０００７】また、前記所定の条件を、前記加熱部を加
熱時および、停止時に、前記センサで検出される検出値
が、所定の範囲以上に振幅が上下する場合とする。[0007] The predetermined condition may be that the value detected by the sensor fluctuates in amplitude above or below a predetermined range when the heating unit is heated and stopped.
【０００８】また、前記加熱部を、前記センサの近傍に
設けた抵抗、またはヒーターなどの電熱体とする。[0008] The heating unit may be an electric heater such as a resistor or a heater provided near the sensor.
【０００９】また、前記加熱部を、検査者の指、濡れた
布、ドライヤーなどの温度を変化させる器具などとす
る。The heating unit may be an instrument for changing the temperature, such as a finger of an inspector, a wet cloth, a dryer, or the like.
【００１０】また、前記記憶部には、前記加熱部を所定
の時間加熱させた時の前記センサが検出する検出値の時
間的変化を示す基準環境条件時の標準変化パターンが記
憶され、故障診断時に前記加熱部を所定の時間加熱させ
た時の前記センサが検出する検出値の時間的変化パター
ンと、前記標準変化パターンとを前記比較部で比較し、
それぞれの変化の度合いが所定の差分以下と判定する場
合、前記故障診断部が、前記センサを正常と判定する。[0010] The storage unit stores a standard change pattern under a reference environmental condition indicating a temporal change of a detection value detected by the sensor when the heating unit is heated for a predetermined time, and performs failure diagnosis. Sometimes the temporal change pattern of the detection value detected by the sensor when the heating unit is heated for a predetermined time and the standard change pattern are compared by the comparison unit,
When it is determined that the degree of each change is equal to or smaller than a predetermined difference, the failure diagnosis unit determines that the sensor is normal.
【００１１】また、前記比較部には、基準環境条件と故
障診断時の環境条件との差による検出値の環境補正を行
う環境補正手段を備え、前記記憶部に記憶された前記標
準変化パターンと、前記センサが検出する検出値の時間
的変化パターンとのいずれかを、前記環境補正手段が環
境補正を行う。The comparing section includes an environmental correction means for performing an environmental correction of a detected value based on a difference between a reference environmental condition and an environmental condition at the time of failure diagnosis. The environment correction means performs environment correction on one of the temporal change pattern of the detection value detected by the sensor.
【００１２】また、前記標準変化パターンは所定の温度
や湿度毎に代表値がテーブル形式で記憶されるととも
に、故障診断時に温度と湿度に応じて参照され、参照さ
れた前記標準変化パターンと前記センサが検出する検出
値の時間的変化パターンとが、前記比較部で比較判定さ
れる。The standard change pattern is stored in a table format with a representative value for each predetermined temperature and humidity, and is referred to according to the temperature and humidity at the time of failure diagnosis. Is compared and determined by the comparing unit.
【００１３】また、前記センサが検出する検出値と、前
記記憶部に記憶された故障診断開始時の前記センサが検
出する検出値と、それらの差分値との少なくとも１つを
選択表示可能とするか、または定期的に順番に切換えて
表示する自動切換表示を可能とする。Further, at least one of a detected value detected by the sensor, a detected value detected by the sensor at the start of the failure diagnosis stored in the storage unit, and a difference value between the detected values can be selectively displayed. Alternatively, it is possible to perform automatic switching display in which the display is switched periodically and displayed.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施例を図面に基
づいて詳細に説明する。図１は本発明の一実施例を説明
するための、空気調和機のセンサ故障診断装置の要部ブ
ロック図である。図１に基づいて説明する。空気調和機
１では、リモコンやキーなどの入力部２からの温度や湿
度などの設定値や運転モードなどの指令を受信し、ＣＰ
Ｕからなる制御部３により、温度センサ４ａや湿度セン
サ４ｂなどのセンサ４が検出する検出値を取込み、設定
値と比較しながら冷房、暖房、除湿などの運転モードに
従い、圧縮機やファンモータなどの駆動部５の制御を行
い室内を快適に保つための空調運転を行う。制御部２に
は温度センサ４ａや湿度センサ４ｂなどのセンサ動作の
確認や、センサ４の故障診断を行うために、発熱体６
ａ、６ｂとして電熱体である所定の抵抗値を有する抵抗
からなる加熱部６への制御出力を備えており、故障診断
モードを選択する場合、センサ４に温度上昇などの環境
変化を与え、その環境変化を温度センサ４ａや湿度セン
サ４ｂで検出する検出値の変化度合いを確認し、故障診
断を行う。故障診断時は、開始時の温度センサ４ａや湿
度センサ４ｂなどのセンサ４が検出する初期検出値を記
憶部７に記憶し、計時部８で時間の経過を監視し、所定
の時間の経過での検出値の変化を監視する。所定の時間
の経過後に、記憶部８に記憶された初期検出値と、温度
センサ４ａや湿度センサ４ｂなどのセンサ４が検出する
検出値とを比較９で比較し、一致するか、所定の範囲以
下の差と判定されれば、故障診断部１０ではセンサ４を
正常と診断し、所定の範囲以上の差があれば、センサ４
を異常と判定する。故障診断部１０での正常、異常の診
断結果は、ＬＥＤや文字表示器などからなる表示部１１
に正常、異常の識別表示を行う。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram of a main part of an apparatus for diagnosing sensor failure of an air conditioner for explaining an embodiment of the present invention. A description will be given based on FIG. The air conditioner 1 receives a set value such as temperature and humidity and a command such as an operation mode from an input unit 2 such as a remote controller and a key, and receives a command such as a CP.
The control unit 3 made of U takes in the detection values detected by the sensors 4 such as the temperature sensor 4a and the humidity sensor 4b and compares them with the set values according to the operation modes such as cooling, heating, and dehumidification. Control of the driving unit 5 to perform an air-conditioning operation for keeping the room comfortable. The control unit 2 includes a heating element 6 for confirming the operation of the temperature sensor 4 a and the humidity sensor 4 b and performing a failure diagnosis of the sensor 4.
A and 6b are provided with a control output to the heating unit 6 made of a resistor having a predetermined resistance value as an electric heating element, and when the failure diagnosis mode is selected, an environmental change such as a temperature rise is given to the sensor 4 and the The degree of change of the detection value detected by the temperature sensor 4a or the humidity sensor 4b for detecting an environmental change is confirmed, and a failure diagnosis is performed. At the time of failure diagnosis, an initial detection value detected by the sensor 4 such as the temperature sensor 4a or the humidity sensor 4b at the time of the start is stored in the storage unit 7, and the elapse of time is monitored by the timer unit 8. The change of the detection value of is monitored. After a lapse of a predetermined time, an initial detection value stored in the storage unit 8 is compared with a detection value detected by the sensor 4 such as the temperature sensor 4a or the humidity sensor 4b in a comparison 9 to determine whether they match or are within a predetermined range. If it is determined that the difference is less than or equal to the following, the failure diagnosis unit 10 diagnoses the sensor 4 as normal, and if there is a difference larger than a predetermined range, the sensor 4
Is determined to be abnormal. The diagnosis result of normality or abnormality in the failure diagnosis unit 10 is displayed on a display unit 11 including an LED, a character display, and the like.
The normal and abnormal identification is displayed.
【００１５】記憶部７には、基準環境条件下で発熱体６
ａ、６ｂを所定の時間発熱させた時のセンサ４が検出す
る検出値の時間的変化を時間の経過毎にプロットした標
準変化パターンを記憶している。一方、比較部９には環
境補正手段９ａを有しており、基準条件で記憶部７に記
憶した標準変化パターンを診断時の環境条件に合わせる
か、あるいは、故障診断時に検出した検出値を基準条件
に合わせるための環境補正を行う。環境補正後の標準変
化パターンと、故障診断時に温度センサ４ａや湿度セン
サ４ｂなどのセンサ４が検出する検出値との比較を行
う。比較の結果、一致するか、所定の値以下の差であれ
ば一致と判定し、故障診断部１０では正常と診断し、所
定の差以上の差があれば、センサ４を異常と判定する。
記憶部７は、不揮発性のメモリで構成し、標準変化パタ
ーンを記憶するとともに、故障診断の経過、即ち検出値
の変化パターンや診断結果を選択記憶可能としており、
外部にデータ転送し、事後に内容を確認できるようにし
ている。制御部２には通信制御部１２が備えられてお
り、診断経過や診断結果を外部のパソコンなどに送信し
たり、外部からの指令により、センサ４の故障診断を行
うようにしている。この通信制御部１２による通信機能
は製造時あるいはサービス時のセンサ動作確認、故障診
断などに活用される。The storage unit 7 stores the heating element 6 under the reference environment conditions.
A standard change pattern is stored in which a temporal change of a detection value detected by the sensor 4 when a and 6b generate heat for a predetermined time is plotted with time. On the other hand, the comparing section 9 has an environment correcting means 9a, which matches the standard change pattern stored in the storage section 7 with the reference condition to the environmental condition at the time of diagnosis, or uses the detected value detected at the time of failure diagnosis as a reference. Perform environment correction to meet the conditions. The standard change pattern after the environmental correction is compared with the detection values detected by the sensors 4 such as the temperature sensor 4a and the humidity sensor 4b at the time of failure diagnosis. As a result of the comparison, if they match or the difference is equal to or less than a predetermined value, it is determined that they match, and the failure diagnosis unit 10 diagnoses that the sensor is normal.
The storage unit 7 is configured by a non-volatile memory and stores a standard change pattern, and is capable of selectively storing the progress of a failure diagnosis, that is, a change pattern of a detected value and a diagnosis result.
The data is transferred externally so that the contents can be checked later. The control unit 2 is provided with a communication control unit 12, which transmits a diagnosis progress and a diagnosis result to an external personal computer or the like, and performs a failure diagnosis of the sensor 4 according to an external command. The communication function of the communication control unit 12 is used for sensor operation confirmation and fault diagnosis at the time of manufacture or service.
【００１６】次に、本発明による空気調和機のセンサ故
障診断装置の実施例の動作を図２の制御フローに基づい
て説明する。入力部２が故障診断モードを選択し、故障
診断モードに入ると、故障診断のスタートの指示を確認
する（ＳＴ１）。スタートの指示があると、まず、故障
診断開始時点の温度センサ４ａや湿度センサ４ｂなどの
センサ４が検出する検出値を記憶部７に記憶する。記憶
後、加熱部６である抵抗やヒーターなどの発熱体６ａ、
６ｂによる環境変化をセンサ４に印加する。加熱部６に
よる環境変化の要因としては、他に検査者の指、濡れた
布、ドライヤーなどの温度または湿度を変化させる器具
などの手段が考えられる。加熱部６による環境変化の印
加と同時に計時部８での計時をスタートする。センサ４
で検出する検出値は所定の時間の経過とともにサンプリ
ングを行い、記憶部７に検出値を順番に記憶する。Next, the operation of the embodiment of the sensor failure diagnosis apparatus for an air conditioner according to the present invention will be described based on the control flow of FIG. When the input unit 2 selects the failure diagnosis mode and enters the failure diagnosis mode, an instruction to start the failure diagnosis is confirmed (ST1). When a start instruction is given, first, the detection values detected by the sensors 4 such as the temperature sensor 4a and the humidity sensor 4b at the start of the failure diagnosis are stored in the storage unit 7. After storage, a heating element 6a such as a resistor or a heater, which is a heating unit 6,
The environmental change by 6b is applied to the sensor 4. As a factor of the environmental change by the heating unit 6, other means such as an inspector's finger, a wet cloth, a drier, and other instruments for changing the temperature or humidity can be considered. At the same time as the application of the environmental change by the heating unit 6, the timer unit 8 starts counting time. Sensor 4
The detection values detected by are sampled as the predetermined time elapses, and the detection values are sequentially stored in the storage unit 7.
【００１７】所定の時間が経過したかどうか確認し、所
定の時間が経過するまで待つ（ＳＴ３）。所定の時間の
経過後、センサ４の検出値を確認し、経過時間に見合っ
た所定の変化があるか、所定の変化を超える変化がある
か即ち、所定の範囲内にあるか確認し（ＳＴ４）、所定
の範囲内でなければ、異常とし異常表示を行う（ＳＴ１
４）。また、検出値がセンサ４の上限または下限のそれ
ぞれの近傍に張り付いていないかどうか確認し（ＳＴ
５）、上限または下限のそれぞれの近傍に張り付いてい
れば異常とし異常表示を行う（ＳＴ１４）。 次に、加
熱部６による環境変化の要因の除去、即ち、発熱体６
ａ、６ｂへの通電を停止し（ＳＴ６）、所定の時間の経
過を確認する（ＳＴ７）。加熱部６による環境変化の要
因の除去後、所定の時間の経過したらセンサ４の検出値
の確認を行う。所定の時間の経過後、センサ４の検出値
を確認し、経過時間に見合った所定の変化があるか、所
定の変化を超える変化があるか即ち、所定の範囲内にあ
るか比較部９で確認し（ＳＴ８）、所定の範囲内でなけ
れば、故障診断部１０が異常と診断し、表示部１１で異
常表示を行う（ＳＴ１４）。センサ４で検出される検出
値が、故障診断の開始時の原状の値に復帰しないか、ま
たは原状に復帰する傾向かどうかを確認し（ＳＴ９）、
少なくとも原状に復帰する傾向にない場合、異常とし異
常表示を行う（ＳＴ１４）。It is confirmed whether or not a predetermined time has elapsed, and waits until the predetermined time has elapsed (ST3). After a lapse of a predetermined time, the detection value of the sensor 4 is checked, and it is checked whether there is a predetermined change corresponding to the elapsed time, or whether there is a change exceeding the predetermined change, that is, within a predetermined range (ST4). If it is not within the predetermined range, it is regarded as abnormal and an abnormal display is performed (ST1).
4). Also, it is checked whether the detected value is stuck near each of the upper and lower limits of the sensor 4 (ST4).
5) If it is stuck near each of the upper limit and the lower limit, it is regarded as abnormal and an abnormal display is performed (ST14). Next, the factor of the environmental change by the heating unit 6 is removed, that is, the heating element 6
The energization of a and 6b is stopped (ST6), and the elapse of a predetermined time is confirmed (ST7). After the factor of the environmental change is removed by the heating unit 6, the detection value of the sensor 4 is confirmed when a predetermined time has elapsed. After the lapse of a predetermined time, the detection value of the sensor 4 is checked, and whether there is a predetermined change corresponding to the elapsed time or a change exceeding the predetermined change, that is, whether the change is within a predetermined range, After confirming (ST8), if not within the predetermined range, the failure diagnosis unit 10 diagnoses as abnormal, and displays an abnormality on the display unit 11 (ST14). It is checked whether the detection value detected by the sensor 4 does not return to the original value at the start of the failure diagnosis or tends to return to the original state (ST9).
At least when there is no tendency to return to the original state, it is regarded as abnormal and an abnormal display is performed (ST14).
【００１８】また、故障診断中、時間の経過とともにプ
ロットした検出値の振幅の上下の振動や変動を確認し
（ＳＴ１０）、加熱部６がセンサ４に加えた環境変化に
対し、センサ４で検出される検出値が所定の値以上に振
動する場合、故障診断部１０が、センサ４を異常と診断
し異常表示を行う（ＳＴ１４）。Further, during the fault diagnosis, it is confirmed whether the amplitude of the detected value plotted with time elapses and fluctuations and fluctuations (ST10), and the sensor 4 detects the environmental change applied to the sensor 4 by the heating unit 6. When the detected value oscillates beyond a predetermined value, the failure diagnosis unit 10 diagnoses the sensor 4 as abnormal and displays an abnormality (ST14).
【００１９】次に、記憶部７には、予め基準環境条件下
で発熱体６ａ、６ｂを所定の時間発熱させた時のセンサ
４が検出する検出値の時間的変化を時間の経過毎にプロ
ットした標準変化パターンを記憶しており、この標準変
化パターンを読出し、診断時にセンサ４が検出する検出
値の時間的変化パターンとを比較部９で比較を行う。一
般的な環境条件下では、条件が多少異なっても、それぞ
れの変化の度合いはあまり差は生じないので、それぞれ
の差分を比較し、差が所定の範囲内であれば、正常と判
定してもよい。しかし、より、精度を高めるために、本
実施例では比較部９に備えられた環境補正手段９ａで、
故障診断時の環境条件に対する環境補正を行う。記憶し
ている標準変化パターンは基準条件が例えば、２５℃、
相対湿度７０％時の値であり、故障診断時の環境条件が
例えば３０℃、相対湿度８０％とすると、正常なセンサ
４で検出する検出値が異なってしまうのを、ほぼ同等と
なるように補正し、双方の比較が可能となるようにする
ためである。環境補正手段９ａで、環境補正を行った補
正済標準変化パターンと、記憶部７で記憶したセンサ４
の検出値のプロット結果とを比較部９で比較を行う（Ｓ
Ｔ１２）。所定の値以下かどうかを確認し、所定の値以
下であれば、故障診断部１０が正常と診断し、表示部１
１で正常表示を行い（ＳＴ１３）。所定の値以上であれ
ば、故障診断部１０が異常と診断し、表示部１１で異常
表示を行う（ＳＴ１４）。次に故障診断が終了かどうか
を確認し（ＳＴ１５）、継続するのであればステップ１
（ＳＴ１）に戻り、終了であれば終了する（ＳＴ１
６）。なお、環境補正手段９ａによる補正は、標準変化
パターンを補正する場合、診断時の検出値に補正する場
合、あるいは、差分値に対して補正する場合、などが考
えられるが、いずれでもよい。Next, the storage unit 7 plots a temporal change of a detection value detected by the sensor 4 when the heating elements 6a and 6b generate heat for a predetermined time under the reference environmental conditions in advance for each elapse of time. The standard change pattern is read out, and the standard change pattern is read out, and the comparison unit 9 compares the standard change pattern with the temporal change pattern of the detection value detected by the sensor 4 at the time of diagnosis. Under general environmental conditions, even if the conditions are slightly different, there is not much difference in the degree of each change, so each difference is compared, and if the difference is within a predetermined range, it is determined to be normal. Is also good. However, in order to further improve the accuracy, in the present embodiment, the environment correction unit 9a provided in the comparison unit 9 uses:
Perform environmental correction for environmental conditions at the time of failure diagnosis. The stored standard change pattern is such that the reference condition is, for example, 25 ° C.
This is a value when the relative humidity is 70%, and if the environmental conditions at the time of failure diagnosis are, for example, 30 ° C. and the relative humidity is 80%, the detection values detected by the normal sensor 4 will be substantially the same. This is to make a correction so that the two can be compared. The corrected standard change pattern subjected to the environment correction by the environment correction unit 9a and the sensor 4 stored in the storage unit 7
The comparison unit 9 compares the plotted result of the detected value with the comparison result (S
T12). It is checked whether the value is equal to or less than a predetermined value. If the value is equal to or less than the predetermined value, the failure diagnosis unit 10 diagnoses that the display is normal.
A normal display is performed in step 1 (ST13). If the value is equal to or more than the predetermined value, the failure diagnosis unit 10 diagnoses as abnormal, and displays an abnormality on the display unit 11 (ST14). Next, it is confirmed whether or not the failure diagnosis has been completed (ST15).
Returning to (ST1), if it is completed, it ends (ST1).
6). The correction by the environment correction unit 9a may be performed when correcting the standard change pattern, when correcting the detection value at the time of diagnosis, or when correcting the difference value.
【００２０】図３は以上説明した制御方法を補足説明す
るための説明図で、製品の出荷前の製造時などに記憶部
７に記憶させる標準変化パターンについて説明する。加
熱部６でセンサ４に印加する環境変化を発熱体で行う場
合、発熱体６ａ、６ｂは（１）に示すようにｔ１で通電
を開始し、ｔ６で通電を中止する。その間に、センサ４
に印加された環境変化は（２）に示すように、ｔ２で温
度が上昇し、次第に緩やかなカーブを描いてｔ４に至
り、十分な時間が経過するとやがてｔ５で飽和に近づ
く。発熱体６ａ、６ｂの通電停止により、環境温度は下
がり始め、ｔ９ではゆるやかになり、やがてｔ１０で初
期の原状に復帰する。この間、温度センサ４ａで検出す
る検出値は（３）で示すように、温度センサ４ａが正常
な場合は、印加された環境変化からやや遅れてｔ３で立
上り、ｔ８で立下がるが、環境変化と同様のカーブを描
く。湿度センサ４ｂで検出する検出値は（４）で示すよ
うに、湿度センサ４ｂが正常な場合は、温度と反対のカ
ーブを描く。これは、温度が上昇すると、空気の飽和蒸
気圧が上がり、従って相対湿度は下がり、温度が下がる
と空気の飽和蒸気圧が下がり、従って相対湿度が上がる
ためで、相対湿度は印加された環境変化からやや遅れて
ｔ３で立下がり、ｔ８で立下がるが、温度による変化と
逆の上下反転したカーブを描く。FIG. 3 is an explanatory diagram for supplementarily explaining the above-described control method. A standard change pattern stored in the storage unit 7 at the time of manufacturing before shipment of a product will be described. When the heating unit 6 changes the environment applied to the sensor 4 by the heating element, the heating elements 6a and 6b start energizing at t1 as shown in (1) and stop energizing at t6. Meanwhile, sensor 4
(2), the temperature rises at t2, gradually draws a gentle curve to t4, and after a sufficient time elapses, approaches saturation at t5. When the power supply to the heating elements 6a and 6b is stopped, the environmental temperature starts to decrease, becomes gentle at t9, and returns to the initial state at t10. During this time, the detection value detected by the temperature sensor 4a rises at t3 and falls at t8 with a slight delay from the applied environmental change when the temperature sensor 4a is normal, as shown by (3). Draw a similar curve. As indicated by (4), the detection value detected by the humidity sensor 4b draws a curve opposite to the temperature when the humidity sensor 4b is normal. This is because as the temperature rises, the saturated vapor pressure of the air rises, and therefore the relative humidity decreases, and as the temperature falls, the saturated vapor pressure of the air falls, and thus the relative humidity rises. After a short delay from t3, the curve falls at t8, and falls at t8.
【００２１】故障診断時に、診断時間を十分に確保でき
れば、図３に示すように温度や湿度は上昇後および下降
後に飽和するが、診断時間が短い場合には飽和せず、図
４に示すようなパターンになる。発熱体６ａ、６ｂの通
電時間は（１）に示すようにｔ１〜ｔ６は短く、従っ
て、センサ４に印加される環境変化は（２）に示すよう
に、ｔ２で立上がるが、上昇の途中のｔ７で下がり始め
る。温度センサ４ａで検出されうる検出値も（３）に示
すようにｔ３から立上がり、ｔ８で立下がる。湿度セン
サ４ｂの検出値も（４）に示すように、ｔ３で立下が
り、ｔ８で立上がる。図から、発熱体６ａ、６ｂへの通
電時間は短くても、センサ４が正常な場合は、センサ４
で検出する立上がり、および立下がりの波形は同様であ
り、通電停止後も十分な時間を経過すれば、原状の値に
収束するようにして戻る。これらの標準変化パターンを
記憶しておき、同一の時間軸で比較を行えば、センサ４
の不良や特性の劣化を検出することができる。標準変化
パターンは、基準条件でのパターンを基本データとして
記憶し、故障診断時の環境条件に合わせて補正する方法
と、所定の環境条件の標準パターンを数種類用意し、テ
ーブル方式で記憶させておき、診断時の温度や湿度に適
合する標準パターンを参照する方法がある。基本データ
を補正で取得する方法は、メモリ容量を削減でき、テー
ブル方式は環境条件に応じて参照すればよいので、制御
を単純化することができる。At the time of failure diagnosis, if the diagnosis time is sufficiently ensured, the temperature and humidity are saturated after the rise and fall as shown in FIG. 3, but are not saturated when the diagnosis time is short, as shown in FIG. Pattern. The energization time of the heating elements 6a and 6b is short from t1 to t6 as shown in (1). Therefore, the environmental change applied to the sensor 4 rises at t2 as shown in (2), Starts falling at t7. The detection value that can be detected by the temperature sensor 4a rises from t3 as shown in (3), and falls at t8. The detection value of the humidity sensor 4b also falls at t3 and rises at t8, as shown in (4). As can be seen from the figure, even if the energizing time to the heating elements 6a and 6b is short, when the sensor 4 is normal, the sensor 4
The rising and falling waveforms detected by the above are the same, and after a sufficient time has elapsed even after the power supply is stopped, the waveform returns to converge to the original value. If these standard change patterns are stored and compared on the same time axis, the sensor 4
And the deterioration of characteristics can be detected. For the standard change pattern, a method of storing the pattern under the reference condition as basic data and correcting it according to the environmental condition at the time of failure diagnosis, and preparing several types of standard patterns of the predetermined environmental condition and storing them in a table format. There is a method of referring to a standard pattern suitable for temperature and humidity at the time of diagnosis. The method of acquiring the basic data by correction can reduce the memory capacity, and the table method can be referred to according to the environmental condition, so that the control can be simplified.
【００２２】図５は故障診断時の表示方法の実施例を説
明するための説明図である。（１）は、スタンバイ時に
は時計を表示させ、運転時は設定温度や検出温度を表示
させたり、設定湿度や検出湿度を表示させる表示器を有
する空気調和器の例を示す。運転時は左２桁に設定温度
を、右２桁に検出温度を表示させる。故障診断時には、
故障診断の時間経過に従って、検出される温度や湿度の
検出値を順次表示させる。（２）（ａ）に示すように、
左２桁に温度を、右２桁に湿度を表示させる。図の例は
故障診断開始時の温度と湿度、２０℃、湿度７０％の例
を示し、２秒間程度表示させる。次の２秒間は（ｂ）に
示すようにセンサ４で検出する検出値、図の例では３０
℃、６６％を表示させる。検出値は時間の経過ととも
に、変化する。次の２秒間は（ｃ）に示すようにセンサ
４で検出する検出値と、故障診断開始時の温度と湿度の
初期検出値との差分を表示させる。図の例では１０℃、
４％の表示であるので、故障診断開始時の２０℃、湿度
７０％から１０℃、４％変化したことを示している。こ
のような表示を順次繰り返す。（ｄ）は診断結果を表示
する例を示す。正常な場合はｏｏ、異常な場合はＥＥと
表示している。FIG. 5 is an explanatory diagram for explaining an embodiment of a display method at the time of failure diagnosis. (1) shows an example of an air conditioner having a display for displaying a clock during standby, displaying a set temperature and a detected temperature during operation, and displaying a set humidity and a detected humidity. During operation, the set temperature is displayed in the left two digits and the detected temperature is displayed in the right two digits. At the time of failure diagnosis,
The detected values of the detected temperature and humidity are sequentially displayed as the time of the failure diagnosis elapses. (2) As shown in (a),
Temperature is displayed on the left two digits and humidity is displayed on the right two digits. The example in the figure shows an example in which the temperature and humidity at the start of the failure diagnosis, 20 ° C., and humidity 70%, are displayed for about 2 seconds. In the next two seconds, the detection value detected by the sensor 4 as shown in FIG.
C., 66% is indicated. The detected value changes over time. In the next two seconds, the difference between the detection value detected by the sensor 4 and the initial detection values of temperature and humidity at the start of the failure diagnosis is displayed as shown in FIG. In the example of the figure, 10 ° C,
Since the display is 4%, it indicates that the temperature has changed from 20% at the start of the failure diagnosis and the humidity 70% to 10 ° C and 4%. Such display is sequentially repeated. (D) shows an example of displaying a diagnosis result. Oo is displayed in the case of normal, and EE is displayed in the case of abnormal.
【００２３】表示部１１での表示方法は、何を表示させ
るか、入力部２からの選択を可能としており、加熱部６
の検査方法によって、確認し易い方法を選択可能として
いる。現在値のみを表示させることで、検出値の変化が
監視でき、センサ４の状態や正常、異常を目視でも確認
可能となる。差分表示のみの表示では差分の変化が一目
で確認可能である。故障診断開始時の検出値、診断中の
検出値、それらの差分値とを時分割で順番に切換えて表
示する方法は、少ない桁数の表示器を有効に活用して多
くの情報を表示することができ、初期状態からの変化と
差分とを確認することができる。正常、異常の診断結果
の表示については、（ｄ）に示すように、文字での表示
と、および、ＬＥＤを利用し、正常が緑ＬＥＤの点滅、
異常が赤ＬＥＤの点滅とし、識別表示する方法とを併用
している。The display method on the display unit 11 can be selected from the input unit 2 as to what to display.
According to this inspection method, a method that is easy to confirm can be selected. By displaying only the current value, a change in the detected value can be monitored, and the state, normality, and abnormality of the sensor 4 can be visually confirmed. In the display of only the difference display, the change of the difference can be confirmed at a glance. The method of displaying the detection value at the start of the failure diagnosis, the detection value during the diagnosis, and the difference value thereof in a time-division manner and displaying the information in a time-division manner effectively displays a large number of information by using a display device having a small number of digits. It is possible to confirm the change from the initial state and the difference. As for the display of the diagnosis result of normality and abnormality, as shown in (d), the display is in text, and the LED is used.
An abnormality is indicated by blinking of a red LED, and a method of identifying and displaying is used in combination.
【００２４】以上、加熱部６として発熱体６ａ、６ｂを
用いた場合の実施例について説明したが、別の簡易な方
法として、検査者の指、濡れた布、ドライヤーなどの温
度または湿度を変化させる器具などの、いずれかの組合
せをも可能としている。検査者の指は温度が低い場合
に、濡れた布は温度が高いか、湿度が低い場合、ドライ
ヤーは湿度が高い場合などにそれぞれ有効であり、セン
サ４の反応を確認することができる。センサ４に変化が
なかったり、センサ４の上限や下限に張りつき、原状に
戻らないなどの現象でセンサ４の正常、異常を簡易に判
定することができる。なお、これらの簡易的な方法によ
る故障診断では、検出値の時間的変化パターンと標準変
化パターンとの比較による診断はできないが、立上り、
あるいは、立下りの変化特性などから確認や判定は可能
である。Although the embodiment in which the heating elements 6a and 6b are used as the heating section 6 has been described above, another simple method is to change the temperature or humidity of an inspector's finger, a wet cloth, a dryer, or the like. Any combination, such as a tool to make it possible, is also possible. The finger of the inspector is effective when the temperature is low, the wet cloth is effective when the temperature is high or the humidity is low, and the dryer is effective when the humidity is high, and the reaction of the sensor 4 can be confirmed. It is possible to easily determine whether the sensor 4 is normal or abnormal based on a phenomenon that the sensor 4 does not change, sticks to the upper or lower limit of the sensor 4, and does not return to the original state. In the failure diagnosis by these simple methods, the diagnosis cannot be made by comparing the temporal change pattern of the detected value with the standard change pattern.
Alternatively, confirmation and determination can be made based on the change characteristics of the falling edge.
【００２５】[0025]
【発明の効果】以上のように本発明によると、冷房、暖
房、除湿、故障診断などの運転モードの選択や設定値の
入力を行う入力部と、室内の温度を検出する温度センサ
や湿度を検出する湿度センサ等のセンサと、同センサを
加熱するための加熱部と、時間を計時する計時部と、温
度や湿度を記憶する記憶部と、同記憶部に記憶された温
度や湿度とセンサが検出する温度や湿度の検出値との差
を比較する比較部と、同比較部の比較結果により故障か
どうかの故障診断を行う故障診断部と、同故障診断部の
診断結果を表示する表示部と、制御部とを備え、入力部
が故障診断モードを選択し、センサの故障診断を行う故
障診断時に、同故障診断の開始時にセンサが検出した検
出値を記憶部に記憶し、加熱部を所定の時間加熱させる
とともに、所定の時間の経過後にセンサが検出する検出
値と記憶部に記憶する開始時の検出値とを、比較部が比
較し、センサで検出される検出値が所定の範囲にないと
判定される場合、または、前記センサで検出される検出
値が所定の条件に一致すると判定される場合、故障診断
部が、センサを異常と診断するとともに、診断結果を表
示部に表示するようにしたので、温度センサや湿度セン
サ等の故障診断が比較的精度が高く、簡易に診断可能
な、故障診断モードを備えた空気調和機のセンサ故障診
断装置を提供することができる。As described above, according to the present invention, an input section for selecting operation modes such as cooling, heating, dehumidification, and failure diagnosis and inputting set values, a temperature sensor for detecting indoor temperature, and a humidity are provided. A sensor such as a humidity sensor for detecting, a heating unit for heating the sensor, a timing unit for measuring time, a storage unit for storing temperature and humidity, and a temperature and humidity and sensor stored in the storage unit A comparison unit that compares the difference between the detected values of temperature and humidity detected by the unit, a failure diagnosis unit that performs a failure diagnosis based on the comparison result of the comparison unit, and a display that displays the diagnosis result of the failure diagnosis unit And a control unit, wherein the input unit selects a failure diagnosis mode, and performs a failure diagnosis of the sensor, stores a detection value detected by the sensor at the start of the failure diagnosis in the failure diagnosis, and stores the detected value in the heating unit. Is heated for a predetermined time, and When the comparison unit compares the detection value detected by the sensor after the lapse of time and the detection value at the start stored in the storage unit, and it is determined that the detection value detected by the sensor is not within a predetermined range, or When it is determined that the detection value detected by the sensor matches a predetermined condition, the failure diagnosis unit diagnoses the sensor as abnormal and displays the diagnosis result on the display unit. It is possible to provide a sensor failure diagnosis device for an air conditioner provided with a failure diagnosis mode, in which failure diagnosis of a humidity sensor or the like is relatively accurate and can be easily performed.
【図１】 本発明の空気調和機のセンサ故障診断装置の
一実施例を示す要部ブロック図である。FIG. 1 is a main part block diagram showing one embodiment of a sensor failure diagnosis device for an air conditioner of the present invention.
【図２】 本発明の空気調和機のセンサ故障診断装置の
故障診断方法を説明するための制御フロー図である。FIG. 2 is a control flowchart for explaining a failure diagnosis method of the sensor failure diagnosis device for an air conditioner of the present invention.
【図３】 本発明の空気調和機のセンサ故障診断装置の
故障診断方法を説明するための説明図である。FIG. 3 is an explanatory diagram for explaining a failure diagnosis method of the sensor failure diagnosis device for an air conditioner of the present invention.
【図４】 本発明の空気調和機のセンサ故障診断装置の
故障診断方法を説明するための説明図である。FIG. 4 is an explanatory diagram for explaining a failure diagnosis method of the sensor failure diagnosis device for an air conditioner of the present invention.
【図５】 本発明の空気調和機のセンサ故障診断装置の
表示方法を説明するための説明図である。FIG. 5 is an explanatory diagram for explaining a display method of the sensor failure diagnosis device for an air conditioner of the present invention.
１ 空気調和機 ２ 入力部 ３ 制御部 ４ センサ ４ａ 温度センサ ４ｂ 湿度センサ ５ 駆動部 ６ 加熱部 ６ａ、６ｂ 発熱体 ７ 記憶部 ８ 計時部 ９ 比較判定部 ９ａ 環境補正手段 １０ 故障診断部 １１ 表示部 １２ 通信制御部 DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Input part 3 Control part 4 Sensor 4a Temperature sensor 4b Humidity sensor 5 Drive part 6 Heating part 6a, 6b Heating element 7 Storage part 8 Clock part 9 Comparison judgment part 9a Environment correction means 10 Failure diagnosis part 11 Display part 12 Communication control unit
Claims (10)
モードの選択や設定値の入力を行う入力部と、室内の温
度を検出する温度センサや湿度を検出する湿度センサ等
のセンサと、同センサを加熱するための加熱部と、時間
を計時する計時部と、前記温度センサや前記湿度センサ
が検出する温度や湿度を記憶する記憶部と、同記憶部に
記憶された温度や湿度と前記センサが検出する温度や湿
度の検出値との差を比較する比較部と、同比較部の比較
結果により故障かどうかの故障診断を行う故障診断部
と、同故障診断部の診断結果を表示する表示部と、装置
を制御する制御部とを備え、 前記入力部が前記故障診断モードを選択し、前記センサ
の故障診断を行う故障診断時に、同故障診断の開始時に
前記センサが検出した検出値を前記記憶部に記憶し、前
記加熱部を所定の時間加熱させるとともに、所定の時間
の経過後に前記センサが検出する検出値と前記記憶部に
記憶する開始時の検出値とを、前記比較部が比較し、前
記センサで検出される検出値が所定の範囲にないと判定
される場合、または、前記センサで検出される検出値が
所定の条件に一致すると判定される場合、前記故障診断
部が、前記センサを異常と診断するとともに、診断結果
を前記表示部に表示することを特徴とする空気調和機の
センサ故障診断装置。An input unit for selecting operation modes such as cooling, heating, dehumidification, and failure diagnosis and inputting set values, a sensor such as a temperature sensor for detecting indoor temperature and a humidity sensor for detecting humidity, A heating unit for heating the sensor, a clock unit for measuring time, a storage unit for storing temperature and humidity detected by the temperature sensor and the humidity sensor, and a temperature and humidity stored in the storage unit. A comparison unit that compares the difference between the detected value of the temperature and humidity detected by the sensor, a failure diagnosis unit that performs a failure diagnosis as to whether or not there is a failure based on the comparison result of the comparison unit, and a diagnosis result of the failure diagnosis unit is displayed. And a control unit for controlling the apparatus, wherein the input unit selects the failure diagnosis mode, and performs a failure diagnosis of the sensor, and detects a failure detected by the sensor at the start of the failure diagnosis. Write the value to the storage The heating unit is heated for a predetermined time, and the comparison unit compares a detection value detected by the sensor after a predetermined time has elapsed with a detection value at the start of storage in the storage unit. If it is determined that the detection value detected by the sensor is not within a predetermined range, or if it is determined that the detection value detected by the sensor matches a predetermined condition, the failure diagnosis unit sets the sensor to abnormal. And a diagnostic result is displayed on the display unit.
る検出値が、前記センサの検出可能な上限値、下限値ま
たはその近傍に固定する場合とすることを特徴とする請
求項１記載の空気調和機のセンサ故障診断装置。2. The method according to claim 1, wherein the predetermined condition is such that a detection value detected by the sensor is fixed to an upper limit value, a lower limit value, or a vicinity thereof that can be detected by the sensor. Air conditioner sensor failure diagnosis device.
熱を停止し、所定の時間の経過以降、前記センサで検出
される検出値が、前記記憶部に記憶した故障診断の開始
時の検出値に復帰しないか、または故障診断の開始時の
検出値に復帰する傾向にない場合とすることを特徴とす
る請求項１記載の空気調和機のセンサ故障診断装置。3. A method according to claim 1, wherein the predetermined condition is such that heating by the heating unit is stopped, and a detection value detected by the sensor after a lapse of a predetermined time is detected at the time of start of the failure diagnosis stored in the storage unit. The sensor failure diagnosis apparatus for an air conditioner according to claim 1, wherein the case does not return to the value or does not tend to return to the detection value at the start of the failure diagnosis.
および、停止時に、前記センサで検出される検出値が、
所定の範囲以上に振幅が上下する場合とすることを特徴
とする請求項１記載の空気調和機のセンサ故障診断装
置。4. The method according to claim 1, wherein when the heating unit is heated and when the heating unit is stopped, a detection value detected by the sensor is:
2. The sensor failure diagnosis device for an air conditioner according to claim 1, wherein the amplitude rises and falls above a predetermined range.
た抵抗、またはヒーターなどの電熱体とすることを特徴
とする請求項１ないし４記載の空気調和機のセンサ故障
診断装置。5. The apparatus according to claim 1, wherein the heating unit is a resistor provided near the sensor or an electric heating element such as a heater.
ドライヤーなどの温度を変化させる器具などとすること
を特徴とする請求項１ないし５記載の空気調和機のセン
サ故障診断装置。6. The heating unit may include an inspector's finger, a wet cloth,
The device for diagnosing a sensor failure of an air conditioner according to any one of claims 1 to 5, wherein the device is a device for changing a temperature, such as a dryer.
間加熱させた時の前記センサが検出する検出値の時間的
変化を示す基準環境条件時の標準変化パターンが記憶さ
れ、故障診断時に前記加熱部を所定の時間加熱させた時
の前記センサが検出する検出値の時間的変化パターン
と、前記標準変化パターンとを前記比較判定部で比較判
定し、それぞれの変化の度合いが所定の差分以下と判定
する場合、前記故障診断部が、前記センサを正常と判定
することを特徴とする請求項１ないし６記載の空気調和
機のセンサ故障診断装置。7. A standard change pattern under a reference environmental condition indicating a temporal change of a detection value detected by the sensor when the heating unit is heated for a predetermined time in the storage unit, and a failure diagnosis is performed. Sometimes the temporal change pattern of the detection value detected by the sensor when the heating unit is heated for a predetermined time and the standard change pattern are compared and determined by the comparison and determination unit, and the degree of each change is a predetermined value. 7. The sensor failure diagnosis device for an air conditioner according to claim 1, wherein the failure diagnosis unit determines that the sensor is normal when determining that the difference is equal to or less than the difference.
障診断時の環境条件との差による検出値の環境補正を行
う環境補正手段を備え、前記記憶部に記憶された前記標
準変化パターンと、前記センサが検出する検出値の時間
的変化パターンとのいずれかを、前記環境補正手段が環
境補正を行うことを特徴とする請求項７記載の空気調和
機のセンサ故障診断装置。8. The comparison / determination unit includes environment correction means for correcting an environment of a detected value based on a difference between a reference environment condition and an environment condition at the time of failure diagnosis, and the standard change pattern stored in the storage unit. 8. The sensor failure diagnosis apparatus for an air conditioner according to claim 7, wherein the environment correction means performs an environment correction on one of a time change pattern and a detection value detected by the sensor.
度毎に代表値がテーブル形式で記憶されるとともに、故
障診断時に温度と湿度に応じて参照され、参照された前
記標準変化パターンと前記センサが検出する検出値の時
間的変化パターンとが、前記比較判定部で比較判定され
ることを特徴とする請求項７記載の空気調和機のセンサ
故障診断装置。9. The standard change pattern, wherein a representative value is stored in a table format for each predetermined temperature and humidity, and is referred to according to temperature and humidity at the time of failure diagnosis. 8. The sensor failure diagnosis apparatus for an air conditioner according to claim 7, wherein the temporal change pattern of the detection value detected by the detection unit is compared and determined by the comparison determination unit.
記憶部に記憶された故障診断開始時の前記センサが検出
する検出値と、それらの差分値との少なくとも１つを選
択表示可能とするか、または定期的に順番に切換えて表
示する自動切換表示を可能とすることを特徴とする請求
項１ないし９記載の空気調和機のセンサ故障診断装置。10. A method for selectively displaying at least one of a detection value detected by the sensor, a detection value detected by the sensor at the time of starting a failure diagnosis stored in the storage unit, and a difference value between them. 10. The sensor failure diagnosis apparatus for an air conditioner according to claim 1, wherein an automatic switching display for periodically or sequentially switching display is enabled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000040534A JP2001227790A (en) | 2000-02-18 | 2000-02-18 | Device for diagnosing fault of sensor of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000040534A JP2001227790A (en) | 2000-02-18 | 2000-02-18 | Device for diagnosing fault of sensor of air conditioner |
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| Publication Number | Publication Date |
|---|---|
| JP2001227790A true JP2001227790A (en) | 2001-08-24 |
Family
ID=18563896
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000040534A Pending JP2001227790A (en) | 2000-02-18 | 2000-02-18 | Device for diagnosing fault of sensor of air conditioner |
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| Country | Link |
|---|---|
| JP (1) | JP2001227790A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003222369A (en) * | 2002-01-29 | 2003-08-08 | Mitsubishi Heavy Ind Ltd | Air conditioner |
| JP2006244376A (en) * | 2005-03-07 | 2006-09-14 | Toshiba Corp | Toll collection system and maintenance method thereof |
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| JP2009109139A (en) * | 2007-10-31 | 2009-05-21 | Daikin Ind Ltd | Humidity conditioner |
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| JP2006244376A (en) * | 2005-03-07 | 2006-09-14 | Toshiba Corp | Toll collection system and maintenance method thereof |
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