JP4155680B2

JP4155680B2 - Air conditioner

Info

Publication number: JP4155680B2
Application number: JP29927899A
Authority: JP
Inventors: 正行熊倉; 正徳森; 雅男横山; 光浩 ▲土▼橋; 栄二大橋
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 1999-10-21
Filing date: 1999-10-21
Publication date: 2008-09-24
Anticipated expiration: 2019-10-21
Also published as: JP2001116320A

Description

【０００１】
【発明の属する技術分野】
本発明は、室外ユニット及び室内ユニットを制御装置が制御する空気調和装置に関する。
【０００２】
【従来の技術】
空気調和装置には、一般に、冷房運転と暖房運転とを択一に実施できる冷・暖房切換可能機種と、冷房運転のみしか実施できない冷房専用機種とがある。
【０００３】
また、空気調和装置における室外ユニット及び室内ユニットを制御する制御装置には、冷・暖房切換可能機種と冷房専用機種の両者に共用な制御基板を備えたものがある。このような制御装置では、制御基板に設けられた切換スイッチの操作により、当該制御基板が冷・暖房切換可能機種の空気調和装置用に設定されたり、冷房専用機種の空気調和装置用に設定される。
【０００４】
【発明が解決しようとする課題】
ところで、上述のような制御基板を冷房専用機種の空気調和装置における制御装置に搭載し、このとき制御基板の切換スイッチを誤って操作して、この制御基板を冷・暖房切換可能な空気調和装置用のものに設定してしまう場合がある。このような場合、上記制御装置が暖房運転指令を受け入れて空気調和装置を運転させても、当該空気調和装置は構造上冷房運転しか実施できないので、室内を暖房できない不具合を生ずる。
【０００５】
このような不具合は、空気調和装置の使用者が、暖房運転指令を出したにもかかわらず室温が上昇しないのは妙だというように人が判断していた。
【０００６】
また、空気調和装置における機種（冷・暖房切換可能機種または冷房専用機種）と、制御装置における制御基板の切換スイッチにより設定された機種とが一致している場合にも、冷房運転または暖房運転中に、四方弁などの部品の不良や冷媒量の不足などの冷凍サイクルの異常によって、室内が冷房または暖房されない場合がある。このときにも、上述のようにして、使用者が空気調和装置の運転の適否を判断していた。
【０００７】
上述の事情を考慮し、請求項１に記載の発明の目的は、冷・暖房切換可能機種と冷房専用機種に共用な制御基板を用いた制御装置における機種設定の過誤を迅速に検知できる空気調和装置を提供することにあり、また、請求項３に記載の発明の目的は、冷凍サイクルの異常を迅速に検知できる空気調和装置を提供することにある。
【０００８】
【課題を解決するための手段】
請求項１に記載の発明は、室外熱交換器を備えた室外ユニットと、室内熱交換器を備えた室内ユニットと、これらの室外ユニット及び室内ユニットを制御する制御装置とを有する空気調和装置において、上記室外ユニットには、上記室外熱交換器内を流れる冷媒の温度を検出する室外熱交換器温度センサが設置され、上記室内ユニットには、上記室内熱交換器内を流れる冷媒の温度を検出する室内熱交換器温度センサが設置され、
上記制御装置は、冷・暖房切換可能機種と冷房専用機種に共用な制御基板を備え、この制御基板に設けられた切換手段により、この制御基板が上記いずれか一方の機種用に設定され、更に、冷房専用機種の空気調和装置の場合、上記制御装置は、暖房運転指令を入力したとき、運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも低いときに、現在の運転が異常であると判断し、前記異常の検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させるとともに、冷・暖房切換可能機種と冷房専用機種に共用な制御基板における機種設定の過誤を含む前記異常を使用者に知らせる、ことを特徴とするものである。
【０００９】
請求項２に記載の発明は、室外熱交換器を備えた室外ユニットと、室内熱交換器を備えた室内ユニットと、これらの室外ユニット及び室内ユニットを制御する制御装置とを有する空気調和装置において、上記室外ユニットには、上記室外熱交換器内を流れる冷媒の温度を検出する室外熱交換器温度センサが設置され、上記室内ユニットには、上記室内熱交換器内を流れる冷媒の温度を検出する室内熱交換器温度センサが設置され、冷・暖房切換可能機種の空気調和装置の場合、上記制御装置は、冷房運転指令を入力したとき、運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも高いときに、現在の運転が異常であると判断し、前記異常の検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させて前記異常を使用者に知らせる、ことを特徴とするものである。
【００１０】
請求項３に記載の発明は、室外熱交換器を備えた室外ユニットと、室内熱交換器を備えた室内ユニットと、これらの室外ユニット及び室内ユニットを制御する制御装置とを有する空気調和装置において、上記室外ユニットには、上記室外熱交換器内を流れる冷媒の温度を検出する室外熱交換器温度センサが設置され、上記室内ユニットには、上記室内熱交換器内を流れる冷媒の温度を検出する室内熱交換器温度センサが設置され、冷・暖房切換可能機種の空気調和装置の場合、上記制御装置は、暖房運転指令を入力したとき、運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも低いときに、現在の運転が異常であると判断し、前記異常の検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させて前記異常を使用者に知らせる、ことを特徴とするものである。
【００１１】
請求項４に記載の発明は、室外熱交換器を備えた室外ユニットと、室内熱交換器を備えた室内ユニットと、これらの室外ユニット及び室内ユニットを制御する制御装置とを有する空気調和装置において、上記室外ユニットには、上記室外熱交換器内を流れる冷媒の温度を検出する室外熱交換器温度センサが設置され、上記室内ユニットには、上記室内熱交換器内を流れる冷媒の温度を検出する室内熱交換器温度センサが設置され、冷房専用機種の空気調和装置の場合、上記制御装置は、冷房運転指令を入力したとき、運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも高いときに、現在の運転が異常であると判断し、前記異常の検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させて前記異常を使用者に知らせる、ことを特徴とするものである。
である。
【００１４】
請求項１記載の発明には、次の作用がある。
【００１５】
冷房専用機種の空気調和装置において、暖房運転指令を入力したとき、運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも低いときに、現在の運転が異常であると判断することから、異常検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させるとともに、機種設定の過誤を含む異常を使用者に知らせることができる。
【００１６】
請求項２乃至４に記載の発明には、次の作用がある。
【００１７】
制御装置は、冷・暖房切換可能機種の空気調和装置の場合、冷房運転指令を入力したとき運転開始後所定時間経過した時点における室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも高いときに、暖房運転指令を入力したとき運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも低いときに、あるいは、冷房専用機種の空気調和装置の場合、冷房運転指令を入力したとき、運転開始後所定時間経過した時点における室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも高いときに、現在の運転が異常であると判断し、前記異常の検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させて前記異常を使用者に知らせることができる。
【００１８】
【発明の実施の形態】
以下、本発明の実施の形態を、図面に基づき説明する。
【００１９】
［Ａ］第一の実施の形態
図１は、本発明に係る空気調和装置の第一の実施の形態が適用された冷・暖房切換可能機種の空気調和装置を示す冷媒回路図である。
【００２０】
図１に示すように、空気調和装置１０は冷・暖房切換可能な機種であり、室外ユニット１１、室内ユニット１２及び制御装置１３を有してなり、室外ユニット１１の室外冷媒配管１４と室内ユニット１２の室内冷媒配管１５とが、連結配管２４、２５を介して連結されている。
【００２１】
室外ユニット１１は室外に設置され、室外冷媒配管１４に圧縮機１６が配設され、この圧縮機１６の吸込側にアキュムレータ１７が、吐出側に四方弁１８が室外冷媒配管１４を介してそれぞれ接続され、この四方弁１８に室外熱交換器１９が室外冷媒配管１４を介して接続されて構成される。室外熱交換器１９には、この室外熱交換器１９へ向かって送風する室外ファン２０が隣接して配置されている。
【００２２】
一方、室内ユニット１２は室内に設置され、室内冷媒配管１５に室内熱交換器２１が配設されると共に、室内冷媒配管１５において室内熱交換器２１近傍に電動膨張弁２２が配設されて構成される。上記室内熱交換器２１には、この室内熱交換器２１へ送風する室内ファン２３が隣接して配置されている。
【００２３】
上記室外ユニット１１には、室外熱交換器１９内を流れる冷媒の温度を検出する室外熱交換器温度センサ２６が設置される。また、上記室内ユニット１２には、室内熱交換器２１内を流れる冷媒の温度を検出する室内熱交換器温度センサ２７が設置される。
【００２４】
また、上記制御装置１３は、室外ユニット１１及び室内ユニット１２の運転を制御し、具体的には、室外ユニット１１における圧縮機１６、四方弁１８及び室外ファン２０、並びに室内ユニット１２における電動膨張弁２２、及び室内ファン２３をそれぞれ制御する。
【００２５】
制御装置１３により四方弁１８が切り換えられることにより、空気調和装置１０が冷房運転又は暖房運転に設定される。つまり、制御装置１３が四方弁１８を冷房側に切り換えたときには、冷媒が実線矢印の如く流れ、室外熱交換器１９が凝縮器に、室内熱交換器２１が蒸発器になって冷房運転状態となり、室内ユニット１２の室内熱交換器２１が室内を冷房する。また、制御装置１３が四方弁１８を暖房側に切り換えたときには、冷媒が破線矢印の如く流れ、室内熱交換器２１が凝縮器に、室外熱交換器１９が蒸発器になって暖房運転状態となり、室内ユニット１２の室内熱交換器２１が室内を暖房する。
【００２６】
また、制御装置１３は、室内ユニット１２の空調負荷に応じて、室内ユニット１２における電動膨張弁２２の開度を制御し、室内ユニット１２における室内ファン２３のファン駆動系を制御する。
【００２７】
また、制御装置１３は、サーモＯＮ運転時には圧縮機１６、室外ファン２０及び室内ファン２３を運転させ、サーモＯＦＦ運転時には室外ファン２０及び室内ファン２３を運転させつつ圧縮機１６を停止させる。
【００２８】
更に、制御装置１３は、冷・暖房切換可能機種と冷房専用機種に共用な制御基板（不図示）を用いて構成され、この制御基板に設けられた切換手段としての切換スイッチ（不図示）が空気調和装置１０の据付時などに操作されることにより、当該制御基板が上記いずれか一方の機種用に設定される。この空気調和装置１０の場合には、切換スイッチの操作により、制御基板は冷・暖房切換可能機種用に設定されるべきである。
【００２９】
そして、この制御装置１３は、運転開始後所定時間経過した時点、例えばサーモＯＮ運転開始後約１分経過した時点における、室内熱交換器温度センサ２７の温度検出値と室外熱交換器温度センサ２６の温度検出値とを比較して、空気調和装置１０の現在の運転の適否を判断する。つまり、制御装置１３は、冷房運転時には、室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも低いかまたは等しいときにのみ空気調和装置１０の現在の運転が正常であると判断し、暖房運転時には、室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも高いかまたは等しいときにのみ空気調和装置１０の現在の運転が正常であると判断する。
【００３０】
例えば、この空気調和装置１０の制御装置１３は、制御基板が冷・暖房切換可能機種用に適正に設定されている場合、冷房運転指令を入力したとき、サーモＯＮ運転から約１分経過した後における室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも高いときには、現在の運転が異常であると判断する。このとき、制御装置１３は、空気調和装置１０の運転を停止して警報を出力したり、空気調和装置１０をサーモＯＦＦ運転として、室外ユニット１１の四方弁１８や制御装置１３の制御基板などの部品の不良、または室外ユニット１１と室内ユニット１２間を流れる冷媒量の不足等を修正させる動作を使用者に促す。
【００３１】
また、例えば、空気調和装置１０の制御装置１３は、制御基板が冷・暖房切換可能機種用に適正に設定されている場合、暖房運転指令を入力したとき、サーモＯＮ運転から約１分経過した後における室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも低いときに、現在の運転が異常であると判断する。この場合も、制御装置１３は、空気調和装置１０の運転を停止して警報を出力したり、空気調和装置１０をサーモＯＦＦ運転として、室外ユニット１１の四方弁１８や制御装置１３の制御基板などの部品の不良、または室外ユニット１１と室内ユニット１２間を流れる冷媒量の不足等を修正させる動作を使用者に促す。
【００３２】
尚、制御基板が冷房専用機種用に過誤設定された場合には、制御装置１３は、暖房運転指令を入力してもこれを受け入れることができず、空気調和装置１０を運転させることがない。
【００３３】
従って、上記実施の形態によれば、次の効果▲１▼を奏する。
【００３４】
▲１▼制御装置１３は、サーモＯＮ運転開始後所定時間（例えば１分）経過した時点における室内熱交換器温度センサ２７による温度検出値と室外熱交換器温度センサ２６による温度検出値とを比較して、現在の空気調和装置１０の運転の適否を判断することから、室外ユニット１１の四方弁１８や制御装置１３の制御基板などの不良、或いは室外ユニット１１と室内ユニット１２間を流れる冷媒量の不足などの冷凍サイクルの異常を迅速に検知することができる。
【００３５】
［Ｂ］第二の実施の形態
図２は、本発明に係る空気調和装置の第二の実施の形態が適用された冷房専用機種の空気調和装置を示す冷媒回路図である。この第二の実施の形態において、前記第一の実施の形態と同様な部分は、同一の符号を付すことにより説明を省略する。
【００３６】
この第二の実施の形態の空気調和装置３０は冷房専用機種の空気調和装置であり、室外ユニット３１に四方弁１８が存在せず、空気調和装置３０の運転時に室外熱交換器１９が常に凝縮器となり、室内熱交換器２１が常に蒸発器となって、冷媒が実線矢印のごとく流れる。
【００３７】
また、この空気調和装置３０の制御装置３２は、制御装置１３と同様な構造であり、且つ四方弁１８の制御を除き制御装置１３と同様に機能するが、その構造及び一部の機能を、制御装置１３との重複部分も含め以下に説明する。
【００３８】
制御装置３２は、冷・暖房切換可能機種と冷房専用機種に共用な制御基板（不図示）を用いて構成され、この制御基板に設けられた切換手段としての切換スイッチ（不図示）が空気調和装置３０の据え付け時に操作されることにより、当該制御基板が上記いずれか一方の機種用に設定される。この空気調和装置３０の場合には、切換スイッチの操作により、制御基板は冷房専用機種用に設定されるべきである。
【００３９】
そして、この空気調和装置３０には、運転開始後所定時間経過した時点、例えばサーモＯＮ運転開始後約１分経過した時点における、室内熱交換器温度センサ２７の温度検出値と室外熱交換器温度センサ２６の温度検出値とを比較して、現在の空気調和装置３０の運転の適否を判断する。つまり、空気調和装置３０の運転時には、室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも低いかまたは等しいときにのみ空気調和装置３０の現在の運転が正常であると判断する。
【００４０】
例えば、この空気調和装置３０の制御装置３２は、制御基板が冷房専用機種用に適正に設定されている場合、冷房運転指令を入力したとき、サーモＯＮ運転開始後約１分経過した時点における、室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも高いときに、現在の空気調和装置３０の運転が異常であると判断する。このとき、制御装置３２は、空気調和装置３０の運転を停止して警報を出力したり、空気調和装置３０をサーモＯＦＦ運転として、制御装置３２の制御基板などの部品の不良、または室外ユニット３１と室内ユニット１２間を流れる冷媒量の不足等を修正させる動作を使用者に促す。
【００４１】
また、例えば、この空気調和装置３０の制御装置３２は、制御基板が誤って冷・暖房切換可能機種用に設定されている場合で、暖房運転指令を入力したときには、この指令に基づき空気調和装置３０を暖房運転させようとする。しかし、空気調和装置３０は構造上冷房サイクル運転しか実施できないので、例えばサーモＯＮ運転開始後約１分経過した時点において、室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも低くなってしまう。このため、制御装置３２は、室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも高いかまたは等しくならないので、現在の空気調和装置３０の運転が異常であると判断し、空気調和装置３０の運転を停止して警報を出力したり、空気調和装置３０をサーモＯＦＦ運転して、制御基板の機種設定の不一致の修正を使用者に促す。
【００４２】
従って、この第二の実施の形態によれば、次の効果▲２▼及び▲３▼を奏する。
【００４３】
▲２▼制御装置３２は、制御基板における機種設定が適正である場合には、冷房運転指令を入力したとき、例えばサーモＯＮ運転開始後約１分経過した時点における、室内熱交換器温度センサ２７による温度検出値と室外熱交換器温度センサ２６による温度検出値とを比較して、現在の空気調和装置３０の運転の適否を判断することから、室外ユニット３１の制御基板などの部品の不良、或いは室外ユニット３１と室内ユニット１２間を流れる冷媒量の不足などの冷凍サイクルの異常を迅速に検知することができる。
【００４４】
▲３▼制御装置３２は、制御基板における機種設定が不適正である場合には、冷房運転指令を入力して、この指令を受け入れたとき、例えばサーモＯＮ運転開始後約１分経過した時点における、室内熱交換器温度センサ２７による温度検出値と室外熱交換器温度センサ２６による温度検出値とを比較して、現在の空気調和装置３０の運転の適否を判断することから、冷・暖房切換可能機種と冷房専用機種に共用な制御基板における機種設定の過誤を迅速に検出できる。
【００４５】
［Ｃ］第三の実施の形態
この第三の実施の形態では、空気調和装置が暖房専用機種の場合であり、室外熱交換器１９が常に蒸発器、室内熱交換器２１が常に凝縮器として機能する。この空気調和装置における制御装置においても、冷・暖房切換可能機種と暖房専用機種に共用な制御基板を採用し、この制御基板の切換スイッチの設定により、当該制御基板を暖房専用機種用に設定している。ところが、この空気調和装置における制御装置の制御基板が、冷・暖房切換可能機種用に過誤設定される場合がある。
【００４６】
この場合、制御装置は、冷房運転指令を受け入れて空気調和装置を例えばサーモＯＮ運転させることがある。しかし、この空気調和装置は暖房運転しか実施できないので、例えばサーモＯＮ運転開始後約１分経過した時点における、室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも低いかまたは等しくならず、高くなってしまう。このようなときには、制御装置は、現在の運転が異常であると判断し、警報を出力して空気調和装置の運転を停止するか、または空気調和装置をサーモＯＦＦ運転させて、使用者に制御基板の機種設定の不適正の修正を促す。
【００４７】
また、この空気調和装置において、制御装置における制御基板の設定が適正に行われている場合、例えば暖房サーモＯＮ運転開始後約１分経過した時点における、室内熱交換器温度センサ２７の温度検出値が室外熱交換器温度センサ２６の温度検出値よりも低い場合にはこの運転が異常であると判断し、警報を出力して空気調和装置を停止させるか、または空気調和装置をサーモＯＦＦ運転させて、各種部品の不良や冷媒量不足等の修正を使用者に促す。
【００４８】
以上、本発明を上記実施の形態に基づいて説明したが、本発明はこれに限定されるものではない。
【００４９】
例えば、制御装置１３及び３２は、制御基板が冷・暖房切換可能機種と冷房専用機種に共用のものであったが、それぞれに専用な機種の制御基板を用いて構成されるものでもよい。この場合には、制御基板の機種設定の不適正による空気調和装置の運転異常は起こりえず、従って、制御装置は、各種部品の不良や冷媒量不足に基づく運転異常のみを判断する。
【００５０】
また、制御装置１３、３２は、それぞれ、室外ユニット１１と室内ユニット１２に個別に設置されて相互に送受信可能に構成された室外ユニット側空気調和装置と室内ユニット側空気調和装置とに分離されていてもよい。この場合、室外ユニット側制御装置が、電動膨張弁２２及び室内ファン２３の制御を除き、本発明の制御装置１３、３２の構造及び機能を果たす。
【００５１】
【発明の効果】
以上のように、請求項１に記載の発明に係る空気調和装置によれば、室外ユニットには、上記室外熱交換器内を流れる冷媒の温度を検出する室外熱交換器温度センサが設置され、上記室内ユニットには、上記室内熱交換器内を流れる冷媒の温度を検出する室内熱交換器温度センサが設置され、上記制御装置は、冷・暖房切換可能機種と冷房専用機種に共用な制御基板を備え、この制御基板に設けられた切換手段により、この制御基板が上記いずれか一方の機種用に設定され、更に、冷房専用機種の空気調和装置の場合、上記制御装置は、暖房運転指令を入力したとき、運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも低いときに、現在の運転が異常であると判断することから、異常の検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させるとともに、冷・暖房切換可能機種と冷房専用機種に共用な制御基板における機種設定の過誤を含む前記異常を使用者に知らせることができる。
【００５２】
請求項２に記載の発明に係る空気調和装置によれば、室外ユニットには、上記室外熱交換器内を流れる冷媒の温度を検出する室外熱交換器温度センサが設置され、上記室内ユニットには、上記室内熱交換器内を流れる冷媒の温度を検出する室内熱交換器温度センサが設置され、冷・暖房切換可能機種の空気調和装置の場合、上記制御装置は、冷房運転指令を入力したとき、運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも高いときに、現在の運転が異常であると判断することから、異常の検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させて異常を迅速に使用者に知らせることができる。
また、請求項３記載の発明にかかる空気調和装置によれば、室外ユニットには、上記室外熱交換器内を流れる冷媒の温度を検出する室外熱交換器温度センサが設置され、上記室内ユニットには、上記室内熱交換器内を流れる冷媒の温度を検出する室内熱交換器温度センサが設置され、冷・暖房切換可能機種の空気調和装置の場合、上記制御装置は、暖房運転指令を入力したとき、運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも低いときに、現在の運転が異常であると判断することから、異常の検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させて異常を迅速に使用者に知らせることができる。
また、請求項４記載の発明に係る空気調和装置によれば、室外ユニットには、上記室外熱交換器内を流れる冷媒の温度を検出する室外熱交換器温度センサが設置され、上記室内ユニットには、上記室内熱交換器内を流れる冷媒の温度を検出する室内熱交換器温度センサが設置され、冷房専用機種の空気調和装置の場合、上記制御装置は、冷房運転指令を入力したとき、運転開始後所定時間経過した時点における、室内熱交換器温度センサによる温度検出値が室外熱交換器温度センサによる温度検出値よりも高いときに、現在の運転が異常であると判断することから、異常の検出時には、空気調和装置の運転を停止して警報を出力し、あるいは、空気調和装置をサーモＯＦＦ運転させて異常を迅速に使用者に知らせることができる。
【図面の簡単な説明】
【図１】本発明に係る空気調和装置の第一の実施の形態が適用された冷・暖房切換可能機種の空気調和装置を示す冷媒回路図である。
【図２】本発明に係る空気調和装置の第二の実施の形態が適用された冷房専用機種の空気調和装置を示す冷媒回路図である。
【符号の説明】
１０空気調和装置
１１室外ユニット
１２室内ユニット
１３制御装置
１９室外熱交換器
２１室内熱交換器
２６室外熱交換器温度センサ
２７室内熱交換器温度センサ
３０空気調和装置
３１室外ユニット
３２制御装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outdoor unit and an air conditioner in which a control device controls an indoor unit.
[0002]
[Prior art]
In general, there are air-conditioning apparatuses that can be switched between a cooling operation and a heating operation, and a cooling-only model that can perform only the cooling operation.
[0003]
Some control devices that control outdoor units and indoor units in an air conditioner include a control board that is shared by both the cooling / heating switching model and the cooling-only model. In such a control device, the control board is set for an air conditioner of a model that can be switched between cooling and heating, or set for an air conditioner of a model dedicated to cooling, by operating a changeover switch provided on the control board. The
[0004]
[Problems to be solved by the invention]
By the way, the control board as described above is mounted on a control apparatus in an air conditioner of a cooling-only model, and an air conditioner capable of switching the cooling / heating of the control board by operating the changeover switch of the control board by mistake at this time. It may be set to the one for use. In such a case, even if the control device accepts the heating operation command and operates the air conditioner, the air conditioner can structurally perform only the cooling operation, so that the room cannot be heated.
[0005]
Such an inconvenience has been determined by humans that it is strange that the user of the air conditioner does not raise the room temperature despite issuing a heating operation command.
[0006]
Also, when the model in the air conditioner (model that can be switched between cooling and heating or a model dedicated to cooling) matches the model set by the switch on the control board in the controller, the cooling or heating operation is in progress. In addition, the room may not be cooled or heated due to an abnormality in the refrigeration cycle such as a defective part such as a four-way valve or an insufficient amount of refrigerant. Also at this time, as described above, the user has determined whether or not the air conditioner is suitable for operation.
[0007]
In view of the above-described circumstances, the object of the invention described in claim 1 is to provide air conditioning that can quickly detect model setting errors in a control device using a control board shared between a cooling / heating switching model and a cooling-only model. An object of the present invention is to provide an air conditioner that can quickly detect an abnormality in the refrigeration cycle.
[0008]
[Means for Solving the Problems]
Invention of Claim 1 in the air conditioning apparatus which has an outdoor unit provided with the outdoor heat exchanger, an indoor unit provided with the indoor heat exchanger, and a control device which controls these outdoor units and the indoor unit The outdoor unit is provided with an outdoor heat exchanger temperature sensor for detecting the temperature of the refrigerant flowing in the outdoor heat exchanger, and the indoor unit detects the temperature of the refrigerant flowing in the indoor heat exchanger. Indoor heat exchanger temperature sensor to be installed,
The control device includes a control board shared by a cooling / heating switching model and a cooling-only model, and the control board is set for any one of the models by the switching means provided on the control board. In the case of a cooling-only model air conditioner, when the heating operation command is input, the controller detects the temperature detected by the indoor heat exchanger temperature sensor at the time when a predetermined time has elapsed after the start of operation. When the temperature is lower than the temperature detected by the sensor, it is determined that the current operation is abnormal. When the abnormality is detected, the operation of the air conditioner is stopped and an alarm is output, or the air conditioner is turned off. The system is operated, and the user is informed of the abnormality including a model setting error in a control board shared by a cooling / heating switching model and a cooling only model. .
[0009]
Invention of Claim 2 in the air conditioning apparatus which has an outdoor unit provided with the outdoor heat exchanger, an indoor unit provided with the indoor heat exchanger, and a control device which controls these outdoor units and the indoor unit The outdoor unit is provided with an outdoor heat exchanger temperature sensor for detecting the temperature of the refrigerant flowing in the outdoor heat exchanger, and the indoor unit detects the temperature of the refrigerant flowing in the indoor heat exchanger. In the case of an air conditioner of a model in which an indoor heat exchanger temperature sensor is installed and can be switched between cooling and heating, the control device performs indoor heat exchange when a predetermined time has elapsed after the start of operation when a cooling operation command is input. When the temperature detection value by the temperature sensor is higher than the temperature detection value by the outdoor heat exchanger temperature sensor, it is determined that the current operation is abnormal. And outputs an alarm to stop the operation of the sum device or an air conditioner by thermo OFF operation inform the user the abnormality, it is characterized in.
[0010]
Invention of Claim 3 in the air conditioning apparatus which has an outdoor unit provided with the outdoor heat exchanger, an indoor unit provided with the indoor heat exchanger, and a control device which controls these outdoor units and the indoor unit The outdoor unit is provided with an outdoor heat exchanger temperature sensor for detecting the temperature of the refrigerant flowing in the outdoor heat exchanger, and the indoor unit detects the temperature of the refrigerant flowing in the indoor heat exchanger. In the case of an air conditioner of a model in which an indoor heat exchanger temperature sensor is installed and can be switched between cooling and heating, the control device performs indoor heat exchange when a predetermined time elapses after starting operation when a heating operation command is input. When the temperature detection value by the temperature sensor is lower than the temperature detection value by the outdoor heat exchanger temperature sensor, it is determined that the current operation is abnormal. And outputs an alarm to stop the operation of the sum device or an air conditioner by thermo OFF operation inform the user the abnormality, it is characterized in.
[0011]
Invention of Claim 4 in the air conditioning apparatus which has an outdoor unit provided with the outdoor heat exchanger, an indoor unit provided with the indoor heat exchanger, and a control device which controls these outdoor units and the indoor unit The outdoor unit is provided with an outdoor heat exchanger temperature sensor for detecting the temperature of the refrigerant flowing in the outdoor heat exchanger, and the indoor unit detects the temperature of the refrigerant flowing in the indoor heat exchanger. In the case of an air conditioner of a cooling-only model, where the indoor heat exchanger temperature sensor is installed, the control device, when a cooling operation command is input, the indoor heat exchanger temperature sensor at the time when a predetermined time has elapsed after the start of operation When the detected temperature value is higher than the detected temperature value by the outdoor heat exchanger temperature sensor, it is determined that the current operation is abnormal. And outputs an alarm stop operation, or an air conditioner by thermo OFF operation inform the user the abnormality, it is characterized in.
It is.
[0014]
The invention according to claim 1 has the following effects.
[0015]
When a heating operation command is input in an air conditioner of a dedicated model for cooling, the temperature detection value by the indoor heat exchanger temperature sensor is higher than the temperature detection value by the outdoor heat exchanger temperature sensor when a predetermined time elapses after the operation starts. When it is low, it is determined that the current operation is abnormal. When an abnormality is detected, the operation of the air conditioner is stopped and an alarm is output, or the air conditioner is thermo-off operated, Users can be notified of abnormalities including errors.
[0016]
The inventions according to claims 2 to 4 have the following effects.
[0017]
In the case of an air conditioner of a type that can be switched between cooling and heating, the control device indicates that the temperature detection value by the indoor heat exchanger temperature sensor at the time when a predetermined time has elapsed after the start of operation when the cooling operation command is input is the outdoor heat exchanger temperature sensor When the heating operation command is input and the temperature detection value by the indoor heat exchanger temperature sensor is higher than the temperature detection value by the outdoor heat exchanger temperature sensor when a predetermined time has elapsed after the start of operation when the heating operation command is input. In the case of an air conditioner of a cooling-only model when it is low or when a cooling operation command is input, the temperature detected by the indoor heat exchanger temperature sensor at the time when a predetermined time has elapsed after the start of operation is the outdoor heat exchanger temperature sensor When the detected temperature is higher than the detected temperature, it is determined that the current operation is abnormal, and when the abnormality is detected, the operation of the air conditioner is stopped and a warning is issued. Outputs, or it can be informed of air conditioner to the user the abnormality by thermo OFF operation.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
[A] First embodiment
FIG. 1 is a refrigerant circuit diagram showing an air conditioner of a model capable of switching between cooling and heating to which the first embodiment of the air conditioner according to the present invention is applied.
[0020]
As shown in FIG. 1, the air conditioner 10 is a model that can be switched between cooling and heating, and includes an outdoor unit 11, an indoor unit 12, and a control device 13, and the outdoor refrigerant pipe 14 and the indoor unit of the outdoor unit 11. 12 indoor refrigerant pipes 15 are connected via connecting pipes 24 and 25.
[0021]
The outdoor unit 11 is installed outside, and a compressor 16 is disposed in the outdoor refrigerant pipe 14. An accumulator 17 is connected to the suction side of the compressor 16, and a four-way valve 18 is connected to the discharge side via the outdoor refrigerant pipe 14. The outdoor heat exchanger 19 is connected to the four-way valve 18 via the outdoor refrigerant pipe 14. An outdoor fan 20 that blows air toward the outdoor heat exchanger 19 is disposed adjacent to the outdoor heat exchanger 19.
[0022]
On the other hand, the indoor unit 12 is installed indoors, and an indoor heat exchanger 21 is provided in the indoor refrigerant pipe 15, and an electric expansion valve 22 is provided in the indoor refrigerant pipe 15 near the indoor heat exchanger 21. Is done. An indoor fan 23 that blows air to the indoor heat exchanger 21 is disposed adjacent to the indoor heat exchanger 21.
[0023]
The outdoor unit 11 is provided with an outdoor heat exchanger temperature sensor 26 that detects the temperature of the refrigerant flowing in the outdoor heat exchanger 19. The indoor unit 12 is provided with an indoor heat exchanger temperature sensor 27 that detects the temperature of the refrigerant flowing in the indoor heat exchanger 21.
[0024]
The control device 13 controls the operation of the outdoor unit 11 and the indoor unit 12, specifically, the compressor 16 in the outdoor unit 11, the four-way valve 18 and the outdoor fan 20, and the electric expansion valve in the indoor unit 12. 22 and the indoor fan 23 are controlled.
[0025]
When the four-way valve 18 is switched by the control device 13, the air conditioner 10 is set to the cooling operation or the heating operation. That is, when the control device 13 switches the four-way valve 18 to the cooling side, the refrigerant flows as indicated by solid arrows, the outdoor heat exchanger 19 becomes the condenser, and the indoor heat exchanger 21 becomes the evaporator, and the cooling operation state is entered. The indoor heat exchanger 21 of the indoor unit 12 cools the room. Further, when the control device 13 switches the four-way valve 18 to the heating side, the refrigerant flows as indicated by broken arrows, the indoor heat exchanger 21 becomes a condenser, and the outdoor heat exchanger 19 becomes an evaporator to enter a heating operation state. The indoor heat exchanger 21 of the indoor unit 12 heats the room.
[0026]
Further, the control device 13 controls the opening degree of the electric expansion valve 22 in the indoor unit 12 according to the air conditioning load of the indoor unit 12 and controls the fan drive system of the indoor fan 23 in the indoor unit 12.
[0027]
Further, the control device 13 operates the compressor 16, the outdoor fan 20 and the indoor fan 23 during the thermo-ON operation, and stops the compressor 16 while operating the outdoor fan 20 and the indoor fan 23 during the thermo-OFF operation.
[0028]
Further, the control device 13 is configured by using a control board (not shown) shared by a cooling / heating switching model and a cooling only model, and a switching switch (not shown) as a switching means provided on the control board is provided. The control board is set for one of the above models by being operated when the air conditioner 10 is installed. In the case of the air conditioner 10, the control board should be set for a model capable of switching between cooling and heating by operating the changeover switch.
[0029]
Then, the control device 13 detects the temperature detection value of the indoor heat exchanger temperature sensor 27 and the outdoor heat exchanger temperature sensor 26 at a time when a predetermined time has elapsed after the start of operation, for example, when approximately 1 minute has elapsed after the start of the thermo-ON operation. Is compared with the detected temperature value, and the suitability of the current operation of the air conditioner 10 is determined. That is, during the cooling operation, the control device 13 presents the current air conditioner 10 only when the temperature detection value of the indoor heat exchanger temperature sensor 27 is lower than or equal to the temperature detection value of the outdoor heat exchanger temperature sensor 26. It is determined that the operation is normal, and during the heating operation, only when the temperature detection value of the indoor heat exchanger temperature sensor 27 is higher than or equal to the temperature detection value of the outdoor heat exchanger temperature sensor 26, Judge that the current driving is normal.
[0030]
For example, the control device 13 of the air conditioner 10 is configured such that when the control board is appropriately set for a model that can be switched between cooling and heating, when a cooling operation command is input, after about 1 minute has elapsed from the thermo-ON operation. When the detected temperature value of the indoor heat exchanger temperature sensor 27 is higher than the detected temperature value of the outdoor heat exchanger temperature sensor 26, it is determined that the current operation is abnormal. At this time, the control device 13 stops the operation of the air conditioner 10 and outputs an alarm, or sets the air conditioner 10 to the thermo OFF operation, such as the four-way valve 18 of the outdoor unit 11 or the control board of the control device 13. The user is prompted to take action to correct a defective part or a shortage of refrigerant flowing between the outdoor unit 11 and the indoor unit 12.
[0031]
Also, for example, when the control board 13 of the air conditioner 10 is appropriately set for a model capable of switching between cooling and heating, when a heating operation command is input, about 1 minute has elapsed since the thermo-ON operation. When the detected temperature value of the indoor heat exchanger temperature sensor 27 later is lower than the detected temperature value of the outdoor heat exchanger temperature sensor 26, it is determined that the current operation is abnormal. Also in this case, the control device 13 stops the operation of the air conditioner 10 and outputs an alarm, or sets the air conditioner 10 to the thermo-OFF operation, and the four-way valve 18 of the outdoor unit 11, the control board of the control device 13, etc. The user is urged to correct the defective parts or the amount of refrigerant flowing between the outdoor unit 11 and the indoor unit 12.
[0032]
If the control board is erroneously set for the cooling-only model, the control device 13 cannot accept the heating operation command even if it is input, and does not operate the air conditioner 10.
[0033]
Therefore, according to the above embodiment, the following effect (1) is achieved.
[0034]
(1) The control device 13 compares the temperature detection value by the indoor heat exchanger temperature sensor 27 with the temperature detection value by the outdoor heat exchanger temperature sensor 26 when a predetermined time (for example, 1 minute) has passed after the thermo-ON operation is started. Then, since it is determined whether or not the current operation of the air conditioner 10 is appropriate, the four-way valve 18 of the outdoor unit 11 and the control board of the control device 13 are defective, or the amount of refrigerant flowing between the outdoor unit 11 and the indoor unit 12 Abnormalities in the refrigeration cycle such as lack of can be detected quickly.
[0035]
[B] Second embodiment
FIG. 2 is a refrigerant circuit diagram showing an air conditioner of a cooling-only model to which the second embodiment of the air conditioner according to the present invention is applied. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0036]
The air conditioner 30 according to the second embodiment is an air conditioner of a cooling only model, the outdoor unit 31 does not have the four-way valve 18, and the outdoor heat exchanger 19 is always condensed during the operation of the air conditioner 30. The indoor heat exchanger 21 is always an evaporator, and the refrigerant flows as indicated by solid arrows.
[0037]
The control device 32 of the air conditioner 30 has the same structure as the control device 13 and functions in the same manner as the control device 13 except for the control of the four-way valve 18. This will be described below, including the overlap with the control device 13.
[0038]
The control device 32 is configured by using a control board (not shown) shared by a cooling / heating switchable model and a cooling-only model, and a change-over switch (not shown) provided as a switching means provided on the control board is air-conditioned. By operating when the apparatus 30 is installed, the control board is set for one of the above models. In the case of the air conditioner 30, the control board should be set for a cooling-only model by operating the changeover switch.
[0039]
The air conditioner 30 includes a temperature detection value of the indoor heat exchanger temperature sensor 27 and an outdoor heat exchanger temperature at a time when a predetermined time has elapsed after the start of operation, for example, when approximately 1 minute has elapsed after the start of the thermo-ON operation. The temperature detection value of the sensor 26 is compared to determine whether the current operation of the air conditioner 30 is appropriate. That is, during the operation of the air conditioner 30, the current operation of the air conditioner 30 is performed only when the temperature detection value of the indoor heat exchanger temperature sensor 27 is lower than or equal to the temperature detection value of the outdoor heat exchanger temperature sensor 26. Is determined to be normal.
[0040]
For example, when the control board 32 is appropriately set for a cooling-only model, the control device 32 of the air conditioner 30 receives a cooling operation command, and when approximately 1 minute has elapsed after the start of the thermo-ON operation, When the temperature detection value of the indoor heat exchanger temperature sensor 27 is higher than the temperature detection value of the outdoor heat exchanger temperature sensor 26, it is determined that the current operation of the air conditioner 30 is abnormal. At this time, the control device 32 stops the operation of the air conditioner 30 and outputs an alarm, or sets the air conditioner 30 as a thermo-OFF operation, or a defective part such as a control board of the control device 32, or the outdoor unit 31. The user is urged to correct the shortage of the refrigerant amount flowing between the indoor units 12.
[0041]
Further, for example, the control device 32 of the air conditioner 30 is configured so that when the control board is erroneously set for a model capable of switching between cooling and heating, and a heating operation command is input, the air conditioner is based on this command. 30 is going to be heated. However, since the air conditioner 30 can only perform the cooling cycle operation because of its structure, for example, when about 1 minute has passed since the start of the thermo-ON operation, the temperature detection value of the indoor heat exchanger temperature sensor 27 becomes the outdoor heat exchanger temperature sensor 26. It will be lower than the detected temperature value. For this reason, since the temperature detection value of the indoor heat exchanger temperature sensor 27 is higher than or not equal to the temperature detection value of the outdoor heat exchanger temperature sensor 26, the control device 32 operates abnormally at the current air conditioner 30. Therefore, the operation of the air conditioner 30 is stopped and an alarm is output, or the air conditioner 30 is thermo-OFF operated to prompt the user to correct the mismatch in the model setting of the control board.
[0042]
Therefore, according to the second embodiment, the following effects (2) and (3) are achieved.
[0043]
(2) When the model setting on the control board is appropriate, the control device 32 inputs the cooling operation command, for example, when the indoor heat exchanger temperature sensor 27 is about 1 minute after the start of the thermo-ON operation. The temperature detection value by the outdoor heat exchanger temperature sensor 26 is compared with the temperature detection value by the outdoor heat exchanger 30 to determine whether or not the current operation of the air conditioner 30 is appropriate. Alternatively, an abnormality in the refrigeration cycle such as an insufficient amount of refrigerant flowing between the outdoor unit 31 and the indoor unit 12 can be quickly detected.
[0044]
(3) When the model setting on the control board is inappropriate, the control device 32 inputs a cooling operation command, and when this command is received, for example, at the time when about 1 minute has passed since the start of the thermo-ON operation. The temperature detection value by the indoor heat exchanger temperature sensor 27 and the temperature detection value by the outdoor heat exchanger temperature sensor 26 are compared to determine whether or not the current operation of the air conditioner 30 is appropriate. It is possible to quickly detect model setting errors on control boards that are shared between possible models and cooling-only models.
[0045]
[C] Third embodiment
In the third embodiment, the air conditioner is a heating-only model, and the outdoor heat exchanger 19 always functions as an evaporator and the indoor heat exchanger 21 always functions as a condenser. In the control device for this air conditioner, a common control board is used for the cooling / heating switching model and the heating-only model, and the control board is set for the heating-only model by setting the switch on the control board. ing. However, the control board of the control device in this air conditioner may be erroneously set for a model that can be switched between cooling and heating.
[0046]
In this case, the control device may accept a cooling operation command and cause the air conditioner to perform a thermo-ON operation, for example. However, since this air conditioner can only perform the heating operation, for example, the temperature detection value of the indoor heat exchanger temperature sensor 27 is the temperature detection of the outdoor heat exchanger temperature sensor 26 when about 1 minute has elapsed since the start of the thermo-ON operation. It is lower than or not equal to the value and will be higher. In such a case, the control device determines that the current operation is abnormal, and outputs a warning to stop the operation of the air conditioner, or causes the air conditioner to perform a thermo-OFF operation and controls the user. Encourage incorrect correction of board model settings.
[0047]
In this air conditioner, when the control board is properly set in the control device, for example, the temperature detection value of the indoor heat exchanger temperature sensor 27 at the time when about 1 minute has elapsed after the start of the heating thermo-ON operation. Is lower than the temperature detection value of the outdoor heat exchanger temperature sensor 26, it is determined that this operation is abnormal, and an alarm is output to stop the air conditioner, or the air conditioner is operated in a thermo-OFF state. Therefore, the user is encouraged to correct various parts, such as defective parts and insufficient refrigerant.
[0048]
As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.
[0049]
For example, although the control boards 13 and 32 are common to both the cooling / heating switchable model and the cooling-only model, the control devices 13 and 32 may be configured using a dedicated control board for each. In this case, the operation abnormality of the air conditioner due to the inappropriate setting of the model of the control board cannot occur. Therefore, the control apparatus determines only the operation abnormality based on the defect of various parts or the insufficient refrigerant amount.
[0050]
The control devices 13 and 32 are separated into an outdoor unit-side air conditioner and an indoor unit-side air conditioner that are individually installed in the outdoor unit 11 and the indoor unit 12 and configured to be able to transmit and receive each other. May be. In this case, the outdoor unit side control device fulfills the structures and functions of the control devices 13 and 32 of the present invention except for the control of the electric expansion valve 22 and the indoor fan 23.
[0051]
【The invention's effect】
As described above, according to the air conditioner according to the first aspect of the present invention, the outdoor unit is provided with the outdoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the outdoor heat exchanger, The indoor unit is provided with an indoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the indoor heat exchanger, and the control device is a control board that is shared between a cooling / heating switching model and a cooling-only model. The control board is set for one of the above models by the switching means provided on the control board, and further, in the case of an air conditioner of a cooling-only model, the control apparatus issues a heating operation command. If the temperature detection value by the indoor heat exchanger temperature sensor is lower than the temperature detection value by the outdoor heat exchanger temperature sensor at the time when a predetermined time has elapsed after the operation starts, the current operation is abnormal. Therefore, when an abnormality is detected, the operation of the air conditioner is stopped and an alarm is output, or the air conditioner is operated in a thermo-OFF state. It is possible to notify the user of the abnormality including a model setting error in the control board.
[0052]
According to the air conditioning apparatus of the second aspect of the present invention, the outdoor unit is provided with an outdoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the outdoor heat exchanger, and the indoor unit includes When the indoor heat exchanger temperature sensor for detecting the temperature of the refrigerant flowing in the indoor heat exchanger is installed and the air conditioner is a model that can be switched between cooling and heating, the control device receives a cooling operation command. When the temperature detected value by the indoor heat exchanger temperature sensor is higher than the temperature detected value by the outdoor heat exchanger temperature sensor when a predetermined time has elapsed after the start of operation, it is determined that the current operation is abnormal. When an abnormality is detected, the operation of the air conditioner can be stopped and an alarm can be output, or the air conditioner can be operated in a thermo-OFF state to notify the user of the abnormality quickly.
According to the air conditioner pertaining to the invention of claim 3, the outdoor unit is provided with an outdoor heat exchanger temperature sensor for detecting the temperature of the refrigerant flowing in the outdoor heat exchanger, and the indoor unit Is an indoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the indoor heat exchanger, and in the case of an air conditioner of a model that can be switched between cooling and heating, the control device inputs a heating operation command When the temperature detection value by the indoor heat exchanger temperature sensor is lower than the temperature detection value by the outdoor heat exchanger temperature sensor at the time when a predetermined time has elapsed after the start of operation, it is determined that the current operation is abnormal Accordingly, when an abnormality is detected, the operation of the air conditioner can be stopped and an alarm can be output, or the air conditioner can be operated in a thermo-OFF state to promptly notify the user of the abnormality.
According to the air conditioner of the invention described in claim 4, the outdoor unit is provided with an outdoor heat exchanger temperature sensor for detecting the temperature of the refrigerant flowing in the outdoor heat exchanger, and the indoor unit is provided with the outdoor unit. Is an indoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the indoor heat exchanger, and in the case of an air conditioner of a cooling-only model, the control device operates when a cooling operation command is input. When the temperature detection value by the indoor heat exchanger temperature sensor is higher than the temperature detection value by the outdoor heat exchanger temperature sensor when a predetermined time has elapsed after the start, it is determined that the current operation is abnormal. When the air conditioner is detected, the operation of the air conditioner can be stopped and an alarm can be output, or the air conditioner can be operated in a thermo-OFF state to promptly notify the user of the abnormality.
[Brief description of the drawings]
FIG. 1 is a refrigerant circuit diagram showing an air conditioner of a model capable of switching between cooling and heating to which a first embodiment of an air conditioner according to the present invention is applied.
FIG. 2 is a refrigerant circuit diagram showing an air conditioner of a cooling-only model to which a second embodiment of the air conditioner according to the present invention is applied.
[Explanation of symbols]
10 Air conditioner
11 Outdoor unit
12 Indoor units
13 Control device
19 Outdoor heat exchanger
21 Indoor heat exchanger
26 Outdoor heat exchanger temperature sensor
27 Indoor heat exchanger temperature sensor
30 Air conditioner
31 outdoor unit
32 Controller

Claims

In an air conditioner having an outdoor unit including an outdoor heat exchanger, an indoor unit including an indoor heat exchanger, and a control device that controls the outdoor unit and the indoor unit.
In the outdoor unit, an outdoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the outdoor heat exchanger is installed,
The indoor unit is provided with an indoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the indoor heat exchanger,
The control device includes a control board shared by the cooling / heating switching model and the cooling-only model, and the control board is set for any one of the above models by the switching means provided on the control board,
Furthermore, in the case of an air conditioner of a cooling-only model, the control device detects the temperature detected by the indoor heat exchanger temperature sensor when a predetermined time has elapsed after the start of operation when the heating operation command is input. When it is lower than the temperature detection value by the temperature sensor, it is determined that the current operation is abnormal,
When the abnormality is detected, the operation of the air conditioner is stopped and an alarm is output, or the air conditioner is thermo-off operated, and the model setting on the control board that is shared between the cooling / heating switching model and the cooling only model Informing the user of the abnormality including the error of
An air conditioner characterized by that.

In an air conditioner having an outdoor unit including an outdoor heat exchanger, an indoor unit including an indoor heat exchanger, and a control device that controls the outdoor unit and the indoor unit.
In the outdoor unit, an outdoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the outdoor heat exchanger is installed,
The indoor unit is provided with an indoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the indoor heat exchanger,
In the case of an air conditioner of a model that can be switched between cooling and heating, when the control device inputs a cooling operation command, the temperature detection value by the indoor heat exchanger temperature sensor at the time when a predetermined time has elapsed after the start of operation is the outdoor heat exchange When the temperature detected by the temperature sensor is higher than the temperature detection value, it is determined that the current operation is abnormal,
Upon detection of the abnormality, the operation of the air conditioner is stopped and an alarm is output, or the air conditioner is thermo-off operated to notify the user of the abnormality.
An air conditioner characterized by that.

In an air conditioner having an outdoor unit including an outdoor heat exchanger, an indoor unit including an indoor heat exchanger, and a control device that controls the outdoor unit and the indoor unit.
In the outdoor unit, an outdoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the outdoor heat exchanger is installed,
The indoor unit is provided with an indoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the indoor heat exchanger,
In the case of an air conditioner of a model that can be switched between cooling and heating, when the heating control command is input, the controller detects the temperature detected by the indoor heat exchanger temperature sensor at the time when a predetermined time has elapsed after the start of operation. When the temperature is lower than the temperature detected by the temperature sensor, it is determined that the current operation is abnormal,
Upon detection of the abnormality, the operation of the air conditioner is stopped and an alarm is output, or the air conditioner is thermo-off operated to notify the user of the abnormality.
An air conditioner characterized by that.

In an air conditioner having an outdoor unit including an outdoor heat exchanger, an indoor unit including an indoor heat exchanger, and a control device that controls the outdoor unit and the indoor unit.
In the outdoor unit, an outdoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the outdoor heat exchanger is installed,
The indoor unit is provided with an indoor heat exchanger temperature sensor that detects the temperature of the refrigerant flowing in the indoor heat exchanger,
In the case of an air conditioner of a cooling-only model, when the cooling operation command is input, the control device detects the temperature detected by the indoor heat exchanger temperature sensor at the time when a predetermined time has elapsed after the start of operation. When the detected temperature is higher than the detected temperature, it is determined that the current operation is abnormal,
Upon detection of the abnormality, the operation of the air conditioner is stopped and an alarm is output, or the air conditioner is thermo-off operated to notify the user of the abnormality.
An air conditioner characterized by that.