JP2004028429A - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
JP2004028429A
JP2004028429A JP2002184464A JP2002184464A JP2004028429A JP 2004028429 A JP2004028429 A JP 2004028429A JP 2002184464 A JP2002184464 A JP 2002184464A JP 2002184464 A JP2002184464 A JP 2002184464A JP 2004028429 A JP2004028429 A JP 2004028429A
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Prior art keywords
temperature
heat exchanger
indoor
indoor heat
reference temperature
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JP2002184464A
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JP4231247B2 (en
Inventor
Toru Ariga
有賀 徹
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Sharp Corp
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Sharp Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Air Conditioning Control Device (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for reducing hunting in an indoor fan without allowing cold air to blow continuously for a long time. <P>SOLUTION: The air conditioner comprises: an indoor heat exchanger 6; an indoor fan 9 for sucking indoor air for heat-exchanging with the indoor heat exchanger 6 for discharging indoors; a temperature detection means 10 for detecting the temperature of the indoor heat exchanger 6; and a controlling apparatus 11 for switching and controlling between a normal operation and a weak-wind operation having less amount of wind according to the detection result of the temperature detection means 10. The controlling apparatus 11 has a means for extending the weak-wind operation time when temperature variations in the indoor heat exchanger 6 exceed a set tolerance. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、空気調和機に関するものであり、より詳細には暖房時における室内ファンの回転数の変化による使用感の低下を防止することが可能な空気調和機に関するものである。
【0002】
【従来の技術】
通常暖房運転の場合、特にノーマルタイプと呼ばれる定回転でしかコンプレッサーが回らないタイプの空気調和機において自動風量にした場合、設定温度と室内温度との差でファン速を決めていくのが普通であり、設定温度と室内温度の差が大きいほどファン回転数を大きくする。
【0003】
ところが、室内熱交換器温度が十分に暖まっていない状態でファン回転数を多くすると、吹き出し空気が温まっていないので冷風を出すことになる。これを防止するために、室内熱交換器温度を測定し、ある一定以上の温度に上がった場合には、ファン回転数を設定回転数にまで上げる通常運転を行い、それ以下の温度の場合は、冷風を防止するためファン回転数を少なくした弱風運転を行うか、あるいはファンは停止ししたままとする。これは、ユーザーの使用感を上げるためには必ず必要な制御となる。
【0004】
しかしながら、外気温が極低温で室内熱交換器温度が非常に上がりにくい場合、一旦、熱交換器温度が弱風運転終了温度まで上がり、通常運転になって風量が上がることにより、熱交換器がすぐに弱風運転開始温度まで落ちることがある。
【0005】
図11は従来の空気調和機における室内熱交換器と室内ファンの回転数との関係を示すグラフである。グラフに示すように、何も対策をとっていない場合、室内ファンから送り出される風が強風になったり、弱風になったりの繰り返しとなり(以下ハンチングという)、ユーザーの使用感を非常に損なう結果となる。
【0006】
このような問題を解決する方法としては、特開平10−267372号公報に記載されているように、ハンチングを起こしたと判断したときには、室内ファン回転数を所定値に下げるようにする方法が知られている。
【0007】
また、特開平11−264599号公報には、室内熱交換器温度低下を検知して、室内ファンを所定回転数ごとに熱交換器温度が所定温度以上に維持できるまで下げ、室温が所定値以上になるまでこの制御を続けた後、室内ファンの回転数を元の設定回転数まで戻す制御方法が記載されている。これらの方法を用いることにより、室内ファンの回転数の変化を抑える効果が認められ、ユーザーの使用性があがる。
【0008】
【発明が解決しようとする課題】
しかしながら、上記方法によって室内ファンの回転数を制御した場合、どちらの方法も、設定回転数で熱交換器温度が維持できない場合には、設定回転数から、順次、ファン回転数を少なくしていく制御を行う。
【0009】
この場合、熱交換器温度を検知ながら、設計意図の吹出し温度になるまで順次ファン回転数を少しずつ少なくしていく制御なので、ファン回転数が弱風運転時より少しだけ高いところでないと熱交換器温度を維持できない場合などは、そのファン回転数になるまでファンの回転数を変更し続けなければならず、所定回転数になるまでの時間がかかるという問題が生じる。
【0010】
そして前述の特開平10−267372号公報記載の方法においては、制御終了条件がコンプレッサー停止、除霜運転、運転停止などでカウンタをリセットしなければ終了しないので、そのような終了条件動作がない状態では、すでにハンチングしない条件になっても、ファン回転数が通常制御に戻らないのでファン回転数を規制したまま(低い回転数)の運転が続くことになる。
【0011】
また、特開平11−264599号公報記載の方法の場合は、初期の設定風量からいきなり超微風ゾーンにならないために、所定値ごとに少しずつファン回転数を少なくしていく制御になっているが、この場合、所定熱交換器温度以上になっているかの判定には、通常、ファン回転数が安定し、熱交換器温度を検知できるまでに、1〜2分間必要となる。
【0012】
したがって、例えば、実施形態に記載されている強風(1400rpm)から超微風(800rpm)まで熱交換器温度を下げなければ、熱交換器温度が維持できない場合、20rpmずつ下げていくのであれば、30ステップ踏むことになり約30分間、冷たい風が吹続けることになる。
【0013】
そこで、本発明は、上記問題に鑑み、長時間にわたって冷風が続くことなく、室内ファンのハンチングを低減することが可能な空気調和機を提供することを目的とする。
【0014】
【課題を解決するための手段】
上記目的を達成するため、本発明に係る空気調和機は、室内熱交換器と、室内空気を吸込んで室内熱交換器と熱交換させて室内に放出する室内ファンと、室内熱交換器の温度を検出する温度検出手段と、温度検出手段による検出温度が基準温度以下になったときに室内ファンの回転数を少なくする弱風運転を行い、基準温度以上になったときに室内ファンの回転数を通常の設定回転数にする通常運転を行うようにした制御装置とを備え、制御装置は、室内熱交換器の温度変動が設定許容範囲を超えたときに、弱風運転時間を延長する延長手段を有することを特徴とする。
【0015】
上記構成により、ハンチングの頻度を減少させることが可能となり、冷風の吹出しを防止することができ、良好な使用感を維持することが可能となる。
【0016】
制御装置としては、制御マイコンを利用し、温度検出手段によって検出された室内熱交換器の温度変動が設定許容範囲内のときは通常運転と弱風運転とに切換え制御し、設定許容範囲を超えたときは、延長手段により、弱風運転を延長するようにすればよい。
【0017】
室内熱交換器の温度変動が設定許容範囲内にあるか否かについては、制御装置において、一定時間における通常運転と弱風運転との切換え回数、すなわち、運転切換えの頻度を計測し、頻度がある一定の値よりも高いときは設定許容範囲外(ハンチングが生じている)と判断して延長手段が作動するように設定してもよいし、室内熱交換器の温度変化率がある一定値よりも大きいときは設定許容範囲外と判断するように設定することも可能である。
【0018】
室内熱交換器の温度変動が設定許容範囲内にある場合、通常運転と弱風運転を切換え制御するには、制御装置にひとつの基準温度を設定し、この温度よりも低いときは弱風運転を行い、高いときは通常運転を行うようにしてもよい。
【0019】
また、制御装置に第一基準温度T1と第二基準温度T2(ただしT1<T2)とを予め設定しておき、室内熱交換器の温度が第一基準温度T1以下のときに室内ファンの回転数の少ない弱風運転を行い、室内熱交換器の温度が第二基準温度T2以上のときに室内ファンの回転数を通常の設定回転数にする通常運転を行うようにすれば、弱風運転と通常運転との切換えの自由度が広がる点で好ましい。
【0020】
延長手段は、弱風運転時間を延長する機能を備えたものであればよく、弱風運転時に室内ファンの回転数を一定にしたままとしてもよいが、室内熱交換器の温度上昇に合わせて室内ファンの回転数を連続的あるいは段階的に上げるようにすれば、早期に温風を室内に吹き出すことが可能になるとともに、熱交換効率を高めることができる。
【0021】
この場合、室内ファンの回転数の上昇速度は、予め設定しておいてもよいが、室内熱交換器の温度を検出しつつ、検出された室内熱交換器の温度が、通常運転から弱風運転に切換えるときの基準となる温度よりも高くなったときに、室内ファンの回転数をさらに上げ、前記基準温度よりも低くなったときに、室内ファンの回転数を下げるようにすれば、実際の室内熱交換器の温度とのずれが少なく、冷風が吹き出すのを抑制することができる。
【0022】
ただ、室内熱交換器の温度は、室内ファンの回転数を変更すると、すぐに変化せず、温度が変化して安定するまでにしばらく時間がかかる。そこで、本発明においては、延長手段として、弱風運転における室内ファンの回転数を段階的に複数設定し、設定されたひとつの回転数で所定時間運転し、その所定時間経過後に検出された室内熱交換器の温度が通常運転から弱風運転に切換えるときの基準となる温度よりも高くなったときに室内ファンの回転数を一段階あるいは複数段上げ、前記基準温度よりも低くなったときに、室内ファンの回転数を一段階あるいは複数段階下げる構成を採用可能とした。
【0023】
所定時間とは、室内ファンの回転数を変更したときに、室内熱交換器の温度が安定するのに必要な時間を意味する。したがって、上記構成によれば、設定されたひとつの回転数で室内ファンを所定時間運転するため、その間に室内熱交換器の温度が安定する。
【0024】
その安定した温度を基に次の所定時間運転する室内ファンの回転数を決定するため、室内ファンの回転数と、実際の室内熱交換器の温度とのずれがほとんどなくなり、冷風が吹き出すのをより確実に抑制することが可能となる。
【0025】
なお、室内ファンの回転数については、一段階ずつ変更してもよいが、所定時間運転する前と後との温度変化率を基に一段階あるいは複数段階変更するようにすれば、よりはやく室内に温風を供給することができる。
【0026】
延長手段が一度作動した後は、そのまま作動状態を持続させてもよいが、弱風運転中に室内ファンの回転数が通常運転時の回転数と同じになったとき、すなわち、室内温度が設定温度に近づいたときに延長手段の動作を終了させるようにすれば、その後、多少の室温の変化があってもその温度変動が設定許容範囲内であれば、延長手段が作動するおそれがない。
【0027】
例えば、ドアや窓の開閉によって一時的に室温が下がっても、延長手段作動時のように、その温度変化に敏感に反応して室内ファンの回転数が変化するおそれがなく、使用感の低下を防止することが可能となる。
【0028】
また、本発明においては、室内熱交換器と、室内空気を吸込んで室内熱交換器と熱交換させて室内に放出する室内ファンと、室内熱交換器の温度を検出する温度検出手段と、室内熱交換器の温度が第一基準温度T1以下になったときに室内ファンの回転数を少なくする弱風運転を行い、室内熱交換器の温度が第二基準温度T2(ただしT1<T2)以上になったときに室内ファンの回転数を通常の設定回転数にする通常運転を行うようにした制御装置とを備え、制御装置は、室内熱交換器の温度変動が設定許容範囲を超えたときに、第一基準温度と第二基準温度との温度差を大きくする構成を採用可能とした。
【0029】
上記構成のように、第一基準温度と第二基準温度との温度差を大きくすることによってもハンチングの頻度を少なくすることが可能となる。第一基準温度と第二基準温度との温度差を大きくするには、例えば、第一基準温度を下げてもよいし、第二基準温度を上げてもよいし、あるいは、第一基準温度を下げ、かつ第二基準温度を上げるようにすることも可能である。
【0030】
第一基準温度を下げる場合には室内ファン通常運転の時間が増加するため、室内をはやく暖めることができ、第二基準温度を上げる場合には弱風運転の時間が増加するため、冷風が吹出しを抑制することができる。
【0031】
制御装置は、第一基準温度と第二基準温度との温度差を大きくした後、室内熱交換器の温度が第一基準温度よりも高い温度を一定時間維持したときには、室内が十分暖められてハンチングを起こすおそれがなくなったと判断して前記第一基準温度と第二基準温度との温度差を元に戻せば、適正な温度範囲の風を室内に供給することができる。
【0032】
本発明における空気調和機は、室内機と室外機とからなるセパレート型であってもよいし、窓枠に取付けるタイプのように凝縮器と蒸発器とが本体内に一体的に収容された一体型であってもよい。なお、後者の場合には、凝縮器が室内熱交換器となる。
【0033】
また、暖房運転のみを行うものであってもよいし、冷凍サイクルを暖房運転サイクルと冷房運転サイクルのいずれかに切換える四方弁のような切換え弁を設けることにより、暖房運転及び冷房運転の両方の運転を可能としたものであってもよい。
【0034】
いずれの場合であっても、本発明によれば、暖房運転時に室内空気を吸込んで凝縮器と熱交換させて室内に放出するための室内ファンのハンチングを効果的に抑制することができる。
【0035】
【発明の実施の形態】
[第1の実施形態]
図1〜4は、本発明の第1の実施形態を示す図であり、図1は空気調和機の構成図を、図2は制御装置を示すブロック図を、図3は制御装置に記憶された動作プログラムを示すフローチャート図を、図4は本実施形態における室内熱交換器の温度と室内ファン回転数との関係を示すグラフをそれぞれ示す。
【0036】
本実施形態においては、制御装置がハンチング頻度が高いと判断したとき、延長手段を作動させて、弱風運転を延長する点に特徴があり、これによりハンチングの頻度を減少させることが可能な構成とされている。
【0037】
図1中、空気調和機内には、圧縮機1、四方弁2、室外熱交換器3、絞り機構4及び室内熱交換器6が設けられており、それぞれが冷媒配管5で順次接続されて、冷媒を循環させる冷媒サイクルが構成されおり、その他、室内ファン9、室外ファン8等を備えている。
【0038】
本実施形態における空気調和機は、セパレート型のものであって、室内機7内には、室内熱交換器6、室内空気を吸込んで室内熱交換器6と熱交換させて室内に放出する室内ファン9、室内熱交換器6の温度を検出する温度検出手段10として温度サーミスタ及び制御装置11が収容されている。
【0039】
制御装置11は、入力回路、CPU、メモリ、出力回路等を備えたマイコンから構成されており、図2に示すように、温度検出手段10からの出力を受けて室内ファン9の回転数を制御するようになっている。
【0040】
本空気調和機においては、弱風運転における室内ファン9の回転数が強風、弱風、微風、超微風の4段階に設定されている。制御装置11は、室内熱交換器6の温度により室内ファン9の運転を切換え制御するようになっている。すなわち、弱風運転の開始温度(第一基準温度)は28℃であり、室内熱交換器6の温度がこの温度以下のときは超微風の風量にて弱風運転が始まる。
【0041】
また、弱風運転が終了する温度(第二基準温度)は、35℃であり、この温度以上のときは通常運転が始まるようになっている。さらに、20℃以下ではファン9を停止させる。なお、運転開始時やリバース除霜終了時のように、ファン9が停止しているときは、室内熱交換器6の温度が35℃以上にならなければ、室内ファン9が回りださないようになっている。
【0042】
制御装置11の制御について、図3、4を基に説明する。暖房運転を開始すると、冷媒は冷媒サイクル14を圧縮機1から四方弁2、室外熱交換器3、絞り機構4、室内熱交換器6、四方弁2、圧縮機1と循環する。
【0043】
今、外気温、室内温度共に−10℃の時に暖房運転を行うとすると、室内熱交換器6の温度が暖まるまでしばらく室内ファン9は停止している。やがて室内熱交換器6温度が上昇し、弱風運転終了温度35℃以上になると、室内ファン9が強風で回り、急激に室内熱交換器6の温度が低下して28℃以下となり、弱風運転が開始されて超微風となる。
【0044】
この通常運転と弱風運転との切換えが所定時間の間に2回繰り返えして起こると、制御装置11は、ハンチングの頻度が高いと判断(ST1)し、延長手段を作動させる。延長手段は、通常運転から弱風運転に切り換って室内熱交換器6の温度が35℃以上になったとき、室内ファン9を弱風運転から通常運転に切換えずに、超微風より一段階高いファン回転数である微風で弱風運転を延長させる。
【0045】
そして、10分間その回転数で運転を行い、室内熱交換器6の温度が第一基準温度(28℃)よりも高い温度を維持できるかどうかを判断する(ST2)。第一基準温度よりも高い温度を維持できたら、もう一段階上げて弱風として10分間その回転数で延長運転を行う。
【0046】
室内熱交換器6の温度が28℃以下となった場合は回転数を一段階下げて10分間その回転数で延長運転を行う。この操作を繰り返し、通常運転の設定風量(この状態では強風)までファン回転数が上がると、ハンチングが生じるおそれがないと判断し(ST3)、延長手段の動作を終了させて通常の切換え制御に戻す。
【0047】
[第2の実施形態]
図5及び図6は第2の実施形態を示す図であり、図5は制御装置が行う制御のフローチャート図を、図6は本実施形態における室内熱交換器の温度と室内ファン回転数との関係を示すグラフをそれぞれ示す。
【0048】
本実施形態においては、制御装置11がハンチング頻度が高いと判断したとき、第一基準温度を下げるようにした点に特徴があり、これによりハンチングの頻度を減少させることが可能な構成とされており、その他の構成は第1の実施形態と同じとされている。
【0049】
本実施形態における制御装置11の制御について、図5、6を基に説明する。制御装置11が、ハンチングの頻度が高いと判断(ST1)したとき、弱風運転の開始温度である第一基準温度を下げて弱風運転に入りにくくする。すなわち、28℃以下で弱風運転に入るところを22℃以下で弱風運転に入るようにする。
【0050】
これは、部屋全体温度上昇を優先させるために、できるだけ長い時間室内ファン9を設定風量(ここでは強風)で回し続けようとするためであり、このような制御にすると、ハンチング頻度が低くなるとともに、室内ファン9が設定風量で回転しやすくなるので、熱交換効率が向上して早く部屋が暖まるという効果を奏する。
【0051】
図6では、第一基準温度が28℃から22℃に変更され、その分室内ファン9の通常運転時間が長くなる。22℃以下になると、超微風となり、室内熱交換器6の温度が35℃になったところで、再び、設定風量である強風となる。
【0052】
これを繰り返すうちに、部屋の温度が高くなり、30分間、熱交換器温度が22℃よりも高い温度を維持するかどうかを判断し(ST2)、維持した場合には、制御装置は第一基準温度を28℃に戻し、通常の切換え制御にもどる。この30分という時間は、通常の切換え制御に復帰したときに熱交換器温度6が28℃になりやすいことを前提にした時間であり、この時間自体は、エアコンの大きさなどにより当然変更されるものである。
【0053】
[第3の実施形態]
図7及び図8は第3の実施形態を示す図であり、図7は制御装置が行う制御のフローチャート図を、図8は本実施形態における室内熱交換器の温度と室内ファン回転数との関係を示すグラフをそれぞれ示す。
【0054】
本実施形態においては、制御装置11がハンチング頻度が高いと判断したとき、第二基準温度を上げるようにした点に特徴があり、これによりハンチングの頻度を減少させることが可能な構成とされており、その他の構成は第1の実施形態と同じとされている。
【0055】
本実施形態における制御装置11の制御について、図7、8を基に説明する。制御装置11が、ハンチングの頻度が高いと判断(ST1)したとき、弱風運転の終了温度、すなわち、第二基準温度を35℃から40℃までに上げる。これにより室内ファンの通常運転が開始されたとき、40℃まで室内熱交換器6温度を上げているので、弱風運転開始温度である28℃まで下がるには時間がかかることになる。
【0056】
上記条件で弱風運転と通常運転とを繰り返しているうちに、熱交換器温度6が28℃以下にならなくなる。そこで、30分間28℃よりも高い温度を維持したかどうかを判断し(ST2)、維持した場合には、制御装置は第二基準温度を35℃に戻し、通常の切換え制御にもどる。
【0057】
このような機能を有する制御装置11を用いれば、ハンチングの頻度を減少させることが可能になるとともに、冷風感を抑えることができる。
【0058】
[第4の実施形態]
図9及び図10は第4の実施形態を示す図であり、図9は制御装置が行う制御のフローチャート図を、図10は本実施形態における室内熱交換器の温度と室内ファン回転数との関係を示すグラフをそれぞれ示す。
【0059】
本実施形態においては、制御装置11がハンチング頻度が高いと判断したとき、第一基準温度を下げ、さらに、第二基準温度を上げるようにした点に特徴があり、これによりハンチングの頻度を減少させることが可能な構成とされており、その他の構成は第1の実施形態と同じとされている。
【0060】
本実施形態における制御装置11の制御について、図9、10を基に説明する。制御装置11が、ハンチングの頻度が高いと判断(ST1)したとき、弱風運転の開始温度である第一基準温度を28℃から22℃に下げて弱風運転に入りにくくするとともに、第二基準温度を35℃から40℃に上げる。このように温度変動幅を大きくすることにより、ハンチングを抑制し、より安定的に通常運転を行うことが可能となる。
【0061】
図10では、室内熱交換器6の温度が40℃になったところで、通常運転である強風となり、熱交換器温度が下がっても22℃まで、長時間通常運転が行われる。そして22℃以下になったところで、超微風になり、これを繰り返すうちに熱交換器温度が22℃を下回らなくなり、30分間、熱交換器温度が22℃よりも高い温度を維持するかどうかを判断し(ST2)、維持した場合には、制御装置は第一基準温度と第二基準温度をそれぞれ28℃と35℃に戻し、通常の切換え制御に復帰する。
【0062】
【発明の効果】
以上の説明から明らかなように、本発明によると、温度検出手段の検出結果によって通常運転と風量の少ない弱風運転とに切換え制御する制御装置が、室内熱交換器の温度変動が設定許容範囲を超えたときに、弱風運転時間を延長する延長手段を有するため、ハンチングの頻度を減少させることが可能となる。
【0063】
延長手段として、弱風運転における室内ファンの回転数を段階的に複数設定し、設定されたひとつの回転数で所定時間運転する手段と、所定時間経過後に検出された室内熱交換器の温度が通常運転から弱風運転に切換えるときの基準となる温度よりも高い場合は、回転数を一段階あるいは複数段階上げる手段と、前記基準温度よりも低い場合には、回転数を一段階あるいは複数段階下げる手段とを有する構成を採用すれば、室内ファンの回転数と、実際の室内熱交換器の温度とのずれが殆どなくなり、冷風が吹き出すのをより確実に抑制することが可能となる。
【0064】
また、制御装置が、室内熱交換器の温度変動が設定許容範囲を超えたときに、室内熱交換器の温度変動幅を大きくするような構成とすることによってもハンチングの頻度を減少させることが可能となる。
【図面の簡単な説明】
【図1】空気調和機の構成図
【図2】制御装置を示すブロック図
【図3】第1の実施形態における制御装置の制御を示すフローチャート図
【図4】図3における室内熱交換器の温度とファン回転数との関係を示すグラフ
【図5】第2の実施形態における制御装置の制御を示すフローチャート図
【図6】図5における室内熱交換器の温度とファン回転数との関係を示すグラフ
【図7】第3の実施形態における制御装置の制御を示すフローチャート図
【図8】図6における室内熱交換器の温度とファン回転数との関係を示すグラフ
【図9】第4の実施形態における制御装置の制御を示すフローチャート図
【図10】図6における室内熱交換器の温度とファン回転数との関係を示すグラフ
【図11】従来の室内熱交換器の温度とファン回転数との関係を示すグラフ
【符号の説明】
1    圧縮機
2    四方弁
3    室外熱交換器
4    絞り機構
5    冷媒配管
6    室内熱交換器
7    室内機
8    室外ファン
9    室内ファン
10    温度検出手段
11    制御装置
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air conditioner, and more particularly, to an air conditioner that can prevent a decrease in usability due to a change in the number of revolutions of an indoor fan during heating.
[0002]
[Prior art]
In normal heating operation, especially in the case of automatic air flow in an air conditioner where the compressor rotates only at a constant rotation called the normal type, it is usual to determine the fan speed based on the difference between the set temperature and the indoor temperature. Yes, the greater the difference between the set temperature and the room temperature, the greater the fan speed.
[0003]
However, if the number of rotations of the fan is increased in a state where the temperature of the indoor heat exchanger is not sufficiently warm, the blown air is not warm, so that cool air is blown. To prevent this, the indoor heat exchanger temperature is measured, and when the temperature rises above a certain level, normal operation is performed to increase the fan speed to the set speed. In order to prevent the cold wind, a weak wind operation with a reduced fan rotation speed is performed, or the fan is stopped. This is a necessary control for improving the user's usability.
[0004]
However, when the outside air temperature is extremely low and the indoor heat exchanger temperature is extremely difficult to rise, the heat exchanger temperature once rises to the weak wind operation end temperature, and the air volume rises in normal operation. The temperature may immediately drop to the low wind operation start temperature.
[0005]
FIG. 11 is a graph showing a relationship between an indoor heat exchanger and a rotation speed of an indoor fan in a conventional air conditioner. As shown in the graph, if no countermeasures are taken, the wind sent from the indoor fan repeatedly becomes a strong wind or a weak wind (hereinafter referred to as hunting), which greatly impairs the user's feeling of use It becomes.
[0006]
As a method for solving such a problem, as described in Japanese Patent Application Laid-Open No. H10-267372, a method is known in which when it is determined that hunting has occurred, the indoor fan speed is reduced to a predetermined value. ing.
[0007]
Also, Japanese Patent Application Laid-Open No. H11-264599 discloses that a temperature decrease of an indoor heat exchanger is detected until the temperature of an indoor fan can be maintained at a predetermined temperature or higher at every predetermined number of rotations, and the room temperature is equal to or higher than a predetermined value. A control method is described in which this control is continued until the rotational speed of the indoor fan is returned to the original set rotational speed. By using these methods, the effect of suppressing a change in the number of revolutions of the indoor fan is recognized, and the usability of the user is improved.
[0008]
[Problems to be solved by the invention]
However, in the case where the rotation speed of the indoor fan is controlled by the above method, in both cases, if the heat exchanger temperature cannot be maintained at the set rotation speed, the fan rotation speed is sequentially reduced from the set rotation speed. Perform control.
[0009]
In this case, the control is to gradually decrease the fan speed until the blow-out temperature of the design intention is reached, while detecting the heat exchanger temperature. When the temperature of the fan cannot be maintained, for example, it is necessary to keep changing the rotation speed of the fan until the rotation speed of the fan is reached, and it takes time to reach the predetermined rotation speed.
[0010]
In the method described in Japanese Patent Application Laid-Open No. H10-267372, the control end condition does not end unless the counter is reset by stopping the compressor, defrosting operation, stopping operation, or the like. In this case, even if the hunting condition is not satisfied, the fan rotation speed does not return to the normal control, and the operation with the fan rotation speed regulated (low rotation speed) continues.
[0011]
Further, in the case of the method described in Japanese Patent Application Laid-Open No. H11-264599, the control is such that the fan rotation speed is gradually decreased at every predetermined value in order to prevent the air volume from suddenly changing from the initially set air volume to the ultra-low wind zone. In this case, in order to determine whether the temperature is equal to or higher than the predetermined heat exchanger temperature, it usually takes 1 to 2 minutes before the fan speed is stabilized and the heat exchanger temperature can be detected.
[0012]
Therefore, for example, if the heat exchanger temperature cannot be maintained unless the heat exchanger temperature is reduced from the strong wind (1400 rpm) to the super breeze (800 rpm) described in the embodiment, and if the heat exchanger temperature is to be decreased by 20 rpm, 30 It takes a step and the cold wind keeps blowing for about 30 minutes.
[0013]
In view of the above problems, an object of the present invention is to provide an air conditioner that can reduce hunting of an indoor fan without continuing cool air for a long time.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, an air conditioner according to the present invention includes an indoor heat exchanger, an indoor fan that sucks indoor air, exchanges heat with the indoor heat exchanger, and discharges the indoor heat exchanger, and a temperature of the indoor heat exchanger. Temperature detection means for detecting the rotation speed of the indoor fan when the temperature detected by the temperature detection means falls below the reference temperature. And a control device for performing a normal operation of setting the normal rotation speed to a normal setting rotation speed, the control device extends the weak wind operation time when the temperature fluctuation of the indoor heat exchanger exceeds the set allowable range. It is characterized by having means.
[0015]
According to the above configuration, it is possible to reduce the frequency of hunting, prevent blowing of cool air, and maintain a good feeling of use.
[0016]
When the temperature fluctuation of the indoor heat exchanger detected by the temperature detecting means is within the set allowable range, the control device is switched to the normal operation and the weak wind operation using the control microcomputer as the control device. In such a case, the weak wind operation may be extended by the extension means.
[0017]
Regarding whether the temperature fluctuation of the indoor heat exchanger is within the set allowable range, the control device measures the number of times of switching between the normal operation and the weak wind operation in a certain time, that is, the frequency of the operation switching, and the frequency is determined. If it is higher than a certain value, it may be determined that the setting is outside the allowable range (hunting has occurred) and the extension means may be set to operate, or the temperature change rate of the indoor heat exchanger may be a certain value. If it is larger than the setting, it is also possible to set so that it is determined to be out of the setting allowable range.
[0018]
When the temperature fluctuation of the indoor heat exchanger is within the set allowable range, one control temperature is set in the control device to control switching between normal operation and low wind operation, and if it is lower than this temperature, low wind operation And the normal operation may be performed when it is high.
[0019]
Further, a first reference temperature T1 and a second reference temperature T2 (where T1 <T2) are set in advance in the control device, and when the temperature of the indoor heat exchanger is equal to or lower than the first reference temperature T1, the rotation of the indoor fan is performed. If a small number of light wind operations are performed, and the temperature of the indoor heat exchanger is equal to or higher than the second reference temperature T2, the normal operation of setting the rotation speed of the indoor fan to the normal set rotation speed is performed, This is preferable in that the degree of freedom for switching between normal operation and normal operation is increased.
[0020]
The extending means may have a function of extending the low wind operation time, and the rotation speed of the indoor fan may be kept constant during the low wind operation, but in accordance with the temperature rise of the indoor heat exchanger. If the number of revolutions of the indoor fan is increased continuously or stepwise, warm air can be blown into the room at an early stage, and the heat exchange efficiency can be increased.
[0021]
In this case, the rising speed of the rotation speed of the indoor fan may be set in advance, but while detecting the temperature of the indoor heat exchanger, the detected temperature of the indoor heat exchanger is changed from the normal operation to the weak wind. If the rotation speed of the indoor fan is further increased when the temperature becomes higher than the reference temperature at the time of switching to the operation, and the rotation speed of the indoor fan is decreased when the temperature becomes lower than the reference temperature, The deviation from the temperature of the indoor heat exchanger is small, and blowing of cold air can be suppressed.
[0022]
However, the temperature of the indoor heat exchanger does not change immediately when the rotation speed of the indoor fan is changed, and it takes a while for the temperature to change and stabilize. Therefore, in the present invention, as the extension means, the number of rotations of the indoor fan in the weak wind operation is set in a plurality of steps, and the indoor fan is operated at the set one rotation number for a predetermined time, and the indoor room detected after the predetermined time has elapsed. When the temperature of the heat exchanger becomes higher than the reference temperature when switching from the normal operation to the low wind operation, the number of rotations of the indoor fan is increased by one or more stages, and when the temperature becomes lower than the reference temperature. In addition, a configuration in which the number of revolutions of the indoor fan is reduced by one step or a plurality of steps can be adopted.
[0023]
The predetermined time means the time required for the temperature of the indoor heat exchanger to stabilize when the number of revolutions of the indoor fan is changed. Therefore, according to the above configuration, the indoor fan is operated at the set one rotation speed for the predetermined time, so that the temperature of the indoor heat exchanger is stabilized during the operation.
[0024]
Since the rotational speed of the indoor fan that operates for the next predetermined time is determined based on the stable temperature, there is almost no difference between the rotational speed of the indoor fan and the actual temperature of the indoor heat exchanger. It is possible to more reliably suppress it.
[0025]
The number of rotations of the indoor fan may be changed by one step at a time, but if the number of steps is changed by one step or a plurality of steps based on the temperature change rate before and after the operation for a predetermined time, the indoor speed is improved more quickly. Can be supplied with warm air.
[0026]
After the extension means is operated once, the operating state may be maintained as it is, but when the rotation speed of the indoor fan becomes the same as the rotation speed during normal operation during the weak wind operation, that is, the indoor temperature is set. If the operation of the extension means is terminated when the temperature approaches, there is no danger that the extension means will operate even if there is a slight change in room temperature if the temperature fluctuation is within the set allowable range.
[0027]
For example, even if the room temperature drops temporarily due to opening and closing of doors and windows, there is no danger that the rotation speed of the indoor fan will change in response to the temperature change as in the case of the operation of the extension means, and the usability will decrease. Can be prevented.
[0028]
Further, in the present invention, an indoor heat exchanger, an indoor fan that sucks indoor air, exchanges heat with the indoor heat exchanger, and discharges the indoor heat, a temperature detecting unit that detects the temperature of the indoor heat exchanger, When the temperature of the heat exchanger falls below the first reference temperature T1, a weak wind operation is performed to reduce the number of revolutions of the indoor fan, and the temperature of the indoor heat exchanger rises above the second reference temperature T2 (where T1 <T2). And a control device that performs a normal operation of setting the rotation speed of the indoor fan to a normal set rotation speed when the temperature of the indoor heat exchanger exceeds a set allowable range. In addition, a configuration in which the temperature difference between the first reference temperature and the second reference temperature is increased can be adopted.
[0029]
As in the above configuration, the frequency of hunting can be reduced by increasing the temperature difference between the first reference temperature and the second reference temperature. In order to increase the temperature difference between the first reference temperature and the second reference temperature, for example, the first reference temperature may be lowered, the second reference temperature may be increased, or the first reference temperature may be increased. It is also possible to lower and raise the second reference temperature.
[0030]
When the first reference temperature is lowered, the time for the indoor fan normal operation increases, so that the room can be quickly warmed. When the second reference temperature is raised, the time for the weak wind operation increases, so that the cool air blows out. Can be suppressed.
[0031]
The control device, after increasing the temperature difference between the first reference temperature and the second reference temperature, when the temperature of the indoor heat exchanger is maintained at a temperature higher than the first reference temperature for a certain time, the room is sufficiently warmed up. If it is determined that the hunting is no longer likely to occur, and the temperature difference between the first reference temperature and the second reference temperature is returned to the original level, wind in an appropriate temperature range can be supplied to the room.
[0032]
The air conditioner of the present invention may be a separate type including an indoor unit and an outdoor unit, or a type in which a condenser and an evaporator are integrally housed in a main body as in a type attached to a window frame. It may be a figure. In the latter case, the condenser becomes an indoor heat exchanger.
[0033]
Further, it may be one that performs only the heating operation, or by providing a switching valve such as a four-way valve that switches the refrigeration cycle to one of the heating operation cycle and the cooling operation cycle, both the heating operation and the cooling operation are performed. It may be one that enables driving.
[0034]
In any case, according to the present invention, it is possible to effectively suppress hunting of the indoor fan for sucking indoor air, exchanging heat with the condenser, and discharging the indoor air during the heating operation.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION
[First Embodiment]
1 to 4 show a first embodiment of the present invention. FIG. 1 is a block diagram showing an air conditioner, FIG. 2 is a block diagram showing a control device, and FIG. 3 is stored in the control device. FIG. 4 is a flowchart showing the operation program, and FIG. 4 is a graph showing the relationship between the temperature of the indoor heat exchanger and the number of rotations of the indoor fan in the present embodiment.
[0036]
The present embodiment is characterized in that, when the control device determines that the hunting frequency is high, the extension means is operated to extend the weak wind operation, whereby the hunting frequency can be reduced. It has been.
[0037]
In FIG. 1, a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a throttle mechanism 4, and an indoor heat exchanger 6 are provided in the air conditioner, each of which is sequentially connected by a refrigerant pipe 5, A refrigerant cycle for circulating the refrigerant is configured, and further includes an indoor fan 9, an outdoor fan 8, and the like.
[0038]
The air conditioner in the present embodiment is of a separate type, and has an indoor heat exchanger 6 inside an indoor unit 7, an indoor air exchanger that sucks indoor air, exchanges heat with the indoor heat exchanger 6, and discharges the indoor air. A temperature thermistor and a control device 11 are housed as temperature detecting means 10 for detecting the temperatures of the fan 9 and the indoor heat exchanger 6.
[0039]
The control device 11 includes a microcomputer having an input circuit, a CPU, a memory, an output circuit, and the like. As shown in FIG. 2, the control device 11 receives an output from the temperature detection unit 10 and controls the rotation speed of the indoor fan 9. It is supposed to.
[0040]
In the present air conditioner, the number of rotations of the indoor fan 9 in the weak wind operation is set to four levels of strong wind, weak wind, light wind, and ultra light wind. The control device 11 switches and controls the operation of the indoor fan 9 based on the temperature of the indoor heat exchanger 6. That is, the starting temperature of the weak wind operation (first reference temperature) is 28 ° C., and when the temperature of the indoor heat exchanger 6 is equal to or lower than this temperature, the weak wind operation starts with the flow rate of the ultra-small wind.
[0041]
The temperature at which the weak wind operation ends (second reference temperature) is 35 ° C. When the temperature is equal to or higher than this temperature, the normal operation starts. Further, at a temperature lower than 20 ° C., the fan 9 is stopped. When the fan 9 is stopped, such as at the start of operation or at the end of reverse defrosting, the indoor fan 9 is prevented from turning unless the temperature of the indoor heat exchanger 6 reaches 35 ° C. or higher. It has become.
[0042]
The control of the control device 11 will be described with reference to FIGS. When the heating operation is started, the refrigerant circulates through the refrigerant cycle 14 from the compressor 1 to the four-way valve 2, the outdoor heat exchanger 3, the throttle mechanism 4, the indoor heat exchanger 6, the four-way valve 2, and the compressor 1.
[0043]
Now, assuming that the heating operation is performed when the outside air temperature and the indoor temperature are both −10 ° C., the indoor fan 9 is stopped for a while until the temperature of the indoor heat exchanger 6 is warmed. Eventually, when the temperature of the indoor heat exchanger 6 rises and reaches a temperature of 35 ° C. or higher at the end of the weak wind operation, the indoor fan 9 rotates by strong wind, and the temperature of the indoor heat exchanger 6 rapidly drops to 28 ° C. or less. The operation starts and the wind becomes very light.
[0044]
When the switching between the normal operation and the low wind operation is repeated twice during the predetermined time, the control device 11 determines that the frequency of the hunting is high (ST1) and activates the extension means. When the temperature of the indoor heat exchanger 6 is switched to 35 ° C. or higher by switching from the normal operation to the low wind operation, the extension means does not switch the indoor fan 9 from the low wind operation to the normal operation, and The low wind speed is extended by the breeze, which is a high fan speed.
[0045]
Then, the operation is performed for 10 minutes at the rotation speed, and it is determined whether or not the temperature of the indoor heat exchanger 6 can be maintained higher than the first reference temperature (28 ° C.) (ST2). When the temperature higher than the first reference temperature can be maintained, the temperature is raised by another level and the extended operation is performed at the rotation speed for 10 minutes as a weak wind.
[0046]
When the temperature of the indoor heat exchanger 6 becomes 28 ° C. or less, the rotation speed is reduced by one step, and the extended operation is performed at the rotation speed for 10 minutes. This operation is repeated, and when the fan rotation speed increases to the set airflow for normal operation (in this state, strong wind), it is determined that there is no risk of hunting (ST3), the operation of the extension means is terminated, and normal switching control is performed. return.
[0047]
[Second embodiment]
5 and 6 are diagrams showing a second embodiment. FIG. 5 is a flowchart of the control performed by the control device. FIG. 6 is a graph showing the relationship between the temperature of the indoor heat exchanger and the number of rotations of the indoor fan in the present embodiment. The graph which shows a relationship is each shown.
[0048]
The present embodiment is characterized in that, when the control device 11 determines that the hunting frequency is high, the first reference temperature is lowered, whereby the hunting frequency can be reduced. The other configuration is the same as that of the first embodiment.
[0049]
Control of the control device 11 in the present embodiment will be described based on FIGS. When the control device 11 determines that the frequency of hunting is high (ST1), the control device 11 lowers the first reference temperature, which is the start temperature of the light wind operation, to make it difficult to enter the light wind operation. That is, the place where the weak wind operation is started at 28 ° C. or less is set to start the weak wind operation at 22 ° C. or less.
[0050]
This is to keep the indoor fan 9 rotating at the set airflow (in this case, strong wind) for as long as possible in order to give priority to a rise in the temperature of the entire room. With such control, the hunting frequency decreases and In addition, since the indoor fan 9 can be easily rotated at the set air volume, the heat exchange efficiency is improved and the room is quickly warmed.
[0051]
In FIG. 6, the first reference temperature is changed from 28 ° C. to 22 ° C., and the normal operation time of the indoor fan 9 is correspondingly increased. When the temperature becomes 22 ° C. or less, the wind becomes an ultra-breeze, and when the temperature of the indoor heat exchanger 6 becomes 35 ° C., the wind becomes the strong wind again at the set air volume.
[0052]
By repeating this, the temperature of the room becomes high, and it is determined whether or not the heat exchanger temperature is maintained at a temperature higher than 22 ° C. for 30 minutes (ST2). The reference temperature is returned to 28 ° C., and the control returns to the normal switching control. This time of 30 minutes is a time on the premise that the heat exchanger temperature 6 tends to be 28 ° C. when returning to the normal switching control, and this time itself is naturally changed depending on the size of the air conditioner and the like. Things.
[0053]
[Third Embodiment]
7 and 8 are diagrams showing a third embodiment. FIG. 7 is a flowchart of the control performed by the control device. FIG. 8 is a graph showing the relationship between the temperature of the indoor heat exchanger and the indoor fan speed in this embodiment. The graph which shows a relationship is each shown.
[0054]
The present embodiment is characterized in that, when the control device 11 determines that the hunting frequency is high, the second reference temperature is raised, whereby the hunting frequency can be reduced. The other configuration is the same as that of the first embodiment.
[0055]
Control of the control device 11 in the present embodiment will be described based on FIGS. When the control device 11 determines that the frequency of hunting is high (ST1), it raises the end temperature of the weak wind operation, that is, the second reference temperature from 35 ° C. to 40 ° C. As a result, when the normal operation of the indoor fan is started, the temperature of the indoor heat exchanger 6 is raised to 40 ° C., so it takes time to lower the temperature to 28 ° C., which is the weak wind operation start temperature.
[0056]
While the weak wind operation and the normal operation are repeated under the above conditions, the heat exchanger temperature 6 does not become 28 ° C. or less. Therefore, it is determined whether or not the temperature higher than 28 ° C. has been maintained for 30 minutes (ST2). If the temperature has been maintained, the control device returns the second reference temperature to 35 ° C. and returns to the normal switching control.
[0057]
By using the control device 11 having such a function, the frequency of hunting can be reduced and the feeling of cool wind can be suppressed.
[0058]
[Fourth embodiment]
9 and 10 are diagrams showing a fourth embodiment. FIG. 9 is a flowchart of the control performed by the control device. FIG. 10 is a diagram showing the relationship between the temperature of the indoor heat exchanger and the indoor fan speed in this embodiment. The graph which shows a relationship is each shown.
[0059]
The present embodiment is characterized in that when the control device 11 determines that the hunting frequency is high, the first reference temperature is lowered and further the second reference temperature is raised, thereby reducing the hunting frequency. The other configuration is the same as that of the first embodiment.
[0060]
Control of the control device 11 in the present embodiment will be described based on FIGS. When the control device 11 determines that the frequency of hunting is high (ST1), the first reference temperature, which is the starting temperature of the weak wind operation, is reduced from 28 ° C. to 22 ° C. to make it difficult to enter the weak wind operation, and Raise the reference temperature from 35 ° C to 40 ° C. By increasing the temperature fluctuation range in this way, hunting can be suppressed and normal operation can be performed more stably.
[0061]
In FIG. 10, when the temperature of the indoor heat exchanger 6 reaches 40 ° C., a strong wind, which is a normal operation, occurs, and the normal operation is performed for a long time up to 22 ° C. even if the temperature of the heat exchanger drops. Then, when the temperature falls below 22 ° C., it becomes a super breeze, and while repeating this, the heat exchanger temperature does not fall below 22 ° C., and for 30 minutes, it is determined whether the heat exchanger temperature is maintained at a temperature higher than 22 ° C. If it is determined (ST2) and maintained, the control device returns the first reference temperature and the second reference temperature to 28 ° C. and 35 ° C., respectively, and returns to the normal switching control.
[0062]
【The invention's effect】
As is clear from the above description, according to the present invention, the control device that controls the switching between the normal operation and the weak wind operation with a small air volume based on the detection result of the temperature detection means is capable of controlling the temperature fluctuation of the indoor heat exchanger within the allowable setting range. , The frequency of hunting can be reduced because of the extension means for extending the low wind operation time.
[0063]
As extension means, the number of rotations of the indoor fan in the low wind operation is set in a plurality of steps in a stepwise manner, a means for operating for a predetermined time at the set number of rotations, and a temperature of the indoor heat exchanger detected after a predetermined time has elapsed. When the temperature is higher than the reference temperature when switching from the normal operation to the low wind operation, the rotation speed is increased by one or more steps, and when the temperature is lower than the reference temperature, the rotation speed is increased by one or more steps. If a configuration having a means for lowering the temperature is adopted, there is almost no difference between the rotational speed of the indoor fan and the actual temperature of the indoor heat exchanger, and it is possible to more reliably suppress the blowing of cool air.
[0064]
In addition, the control device may reduce the frequency of hunting by increasing the temperature fluctuation range of the indoor heat exchanger when the temperature fluctuation of the indoor heat exchanger exceeds the set allowable range. It becomes possible.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an air conditioner. FIG. 2 is a block diagram showing a control device. FIG. 3 is a flowchart diagram showing control of the control device in the first embodiment. FIG. FIG. 5 is a graph showing the relationship between the temperature and the fan speed. FIG. 5 is a flowchart showing the control of the control device in the second embodiment. FIG. 6 is a diagram showing the relationship between the temperature of the indoor heat exchanger and the fan speed in FIG. FIG. 7 is a flowchart showing the control of the control device according to the third embodiment. FIG. 8 is a graph showing the relationship between the temperature of the indoor heat exchanger and the fan speed in FIG. 6. FIG. FIG. 10 is a flowchart showing the control of the control device in the embodiment. FIG. 10 is a graph showing the relationship between the temperature of the indoor heat exchanger and the fan speed in FIG. 6. FIG. 11 is the temperature and the fan speed of the conventional indoor heat exchanger. Relationship with Graph [Description of the code] indicating the
DESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Throttle mechanism 5 Refrigerant piping 6 Indoor heat exchanger 7 Indoor unit 8 Outdoor fan 9 Indoor fan 10 Temperature detection means 11 Control device

Claims (10)

室内熱交換器と、室内空気を吸込んで前記室内熱交換器と熱交換させて室内に放出する室内ファンと、前記室内熱交換器の温度を検出する温度検出手段と、該温度検出手段による検出温度が、基準温度以下になったときに室内ファンの回転数を少なくする弱風運転を行い、基準温度以上になったときに室内ファンの回転数を通常の設定回転数にする通常運転を行うようにした制御装置とを備え、前記制御装置は、室内熱交換器の温度変動が設定許容範囲を超えたときに、弱風運転中に弱風運転時間を延長する延長手段を有することを特徴とする空気調和機。An indoor heat exchanger, an indoor fan that sucks indoor air, exchanges heat with the indoor heat exchanger and discharges the indoor air, temperature detecting means for detecting the temperature of the indoor heat exchanger, and detection by the temperature detecting means. When the temperature falls below the reference temperature, perform a weak wind operation to reduce the number of rotations of the indoor fan, and when the temperature exceeds the reference temperature, perform normal operation to set the rotation number of the indoor fan to the normal setting rotation number. And a control device, wherein the control device has an extension means for extending the low wind operation time during the low wind operation when the temperature fluctuation of the indoor heat exchanger exceeds a set allowable range. And air conditioner. 前記延長手段は、弱風運転時の室内ファンの回転数を多くすることを特徴とする請求項1記載の空気調和機。The air conditioner according to claim 1, wherein the extension unit increases the number of rotations of the indoor fan during the low wind operation. 前記延長手段は、前記室内ファンの回転数を上げているときに検出された室内熱交換器の温度が、通常運転から弱風運転に切換えるときの基準となる温度よりも高くなったときに、室内ファンの回転数をさらに上げ、前記基準温度よりも低くなったときに、室内ファンの回転数を下げる請求項2記載の空気調和機。The extension means, when the temperature of the indoor heat exchanger detected when increasing the rotation speed of the indoor fan becomes higher than the reference temperature when switching from normal operation to low wind operation, The air conditioner according to claim 2, wherein the rotation speed of the indoor fan is further increased, and the rotation speed of the indoor fan is reduced when the rotation speed becomes lower than the reference temperature. 弱風運転における室内ファンの回転数が段階的に複数設定され、前記延長手段は、設定されたひとつの回転数で所定時間運転し、その所定時間経過後に検出された室内熱交換器の温度が通常運転から弱風運転に切換えるときの基準となる温度よりも高くなったときに室内ファンの回転数を一段階あるいは複数段階上げ、前記基準温度よりも低くなったときに、室内ファンの回転数を一段階あるいは複数段階下げる請求項1〜3のいずれかに記載の空気調和機。The number of rotations of the indoor fan in the low wind operation is set in a plurality of steps, and the extension means operates at the set one rotation number for a predetermined time, and the temperature of the indoor heat exchanger detected after the predetermined time elapses. When the temperature becomes higher than the reference temperature when switching from the normal operation to the low wind operation, the rotation speed of the indoor fan is increased by one or more steps, and when the rotation speed becomes lower than the reference temperature, the rotation speed of the indoor fan is changed. The air conditioner according to any one of claims 1 to 3, wherein the air conditioner is lowered by one or more steps. 前記制御装置は、前記弱風運転中に室内ファンの回転数が通常運転時の回転数と同じになったとき、延長手段の動作を終了させる請求項2〜4のいずれかに記載の空気調和機。The air conditioner according to any one of claims 2 to 4, wherein the control device terminates the operation of the extension unit when the number of revolutions of the indoor fan becomes equal to the number of revolutions during normal operation during the low wind operation. Machine. 室内熱交換器と、室内空気を吸込んで前記室内熱交換器と熱交換させて室内に放出する室内ファンと、前記室内熱交換器の温度を検出する温度検出手段と、室内熱交換器の温度が第一基準温度T1以下になったときに室内ファンの回転数を少なくする弱風運転を行い、室内熱交換器の温度が第二基準温度T2(ただしT1<T2)以上になったときに室内ファンの回転数を通常の設定回転数にする通常運転を行うようにした制御装置とを備え、前記制御装置は、室内熱交換器の温度変動が設定許容範囲を超えたときに、前記第一基準温度と第二基準温度との温度差を大きくする空気調和機。An indoor heat exchanger, an indoor fan that sucks indoor air, exchanges heat with the indoor heat exchanger, and discharges the indoor heat exchanger, a temperature detecting unit that detects a temperature of the indoor heat exchanger, and a temperature of the indoor heat exchanger. When the temperature of the indoor heat exchanger is lower than the first reference temperature T1 and the temperature of the indoor heat exchanger is higher than the second reference temperature T2 (T1 <T2), A control device for performing a normal operation to set the rotation speed of the indoor fan to a normal set rotation speed, wherein the control device is configured to perform the second operation when the temperature change of the indoor heat exchanger exceeds a set allowable range. An air conditioner that increases the temperature difference between the first reference temperature and the second reference temperature. 前記制御装置は、室内熱交換器の温度変動が設定許容範囲を超えたときに、第一基準温度を下げる請求項6記載の空気調和機。The air conditioner according to claim 6, wherein the control device lowers the first reference temperature when a temperature change of the indoor heat exchanger exceeds a set allowable range. 前記制御装置は、室内熱交換器の温度変動が設定許容範囲を超えたときに、第二基準温度を上げる請求項6記載の空気調和機。The air conditioner according to claim 6, wherein the control device increases the second reference temperature when a temperature change of the indoor heat exchanger exceeds a set allowable range. 前記制御装置は、室内熱交換器の温度変動が設定許容範囲を超えたときに、第一基準温度を下げ、かつ第二基準温度を上げる請求項6記載の空気調和機。The air conditioner according to claim 6, wherein the control device lowers the first reference temperature and increases the second reference temperature when the temperature fluctuation of the indoor heat exchanger exceeds a set allowable range. 前記制御装置は、第一基準温度と第二基準温度との温度差を大きくした後、室内熱交換器の温度が第一基準温度よりも高い温度を一定時間維持したとき、前記第一基準温度と第二基準温度との温度差を元に戻すことを特徴とする請求項6〜9のいずれかに記載の空気調和機。The controller, after increasing the temperature difference between the first reference temperature and the second reference temperature, when the temperature of the indoor heat exchanger is maintained at a temperature higher than the first reference temperature for a certain time, the first reference temperature The air conditioner according to any one of claims 6 to 9, wherein a temperature difference between the first reference temperature and the second reference temperature is restored.
JP2002184464A 2002-06-25 2002-06-25 Air conditioner Expired - Fee Related JP4231247B2 (en)

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Cited By (12)

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JP2005274052A (en) * 2004-03-25 2005-10-06 Mitsubishi Electric Corp Air-conditioner
JP2007315641A (en) * 2006-05-24 2007-12-06 Matsushita Electric Ind Co Ltd Air conditioner
JP2011058734A (en) * 2009-09-10 2011-03-24 Chofu Seisakusho Co Ltd Method of controlling fan of air conditioner, and air conditioner
JP2011064432A (en) * 2009-09-18 2011-03-31 Chofu Seisakusho Co Ltd Fan control method for air temperature control device and the air temperature control device
JP2011127802A (en) * 2009-12-16 2011-06-30 Sanyo Electric Co Ltd Air conditioner
KR101105764B1 (en) 2004-12-18 2012-01-17 엘지전자 주식회사 Iudoor fan hot control apparatus of air conditioner and control method of the same
JP2012042211A (en) * 2011-11-29 2012-03-01 Chofu Seisakusho Co Ltd Method of controlling fan of air conditioner, and air conditioner
JP2013228114A (en) * 2012-04-24 2013-11-07 Panasonic Corp Range hood
JP2015025638A (en) * 2013-07-29 2015-02-05 ダイキン工業株式会社 Air blowing device
CN106440043A (en) * 2016-10-19 2017-02-22 珠海格力电器股份有限公司 Air conditioner and control method thereof
CN108006906A (en) * 2017-11-03 2018-05-08 特灵空调***(中国)有限公司 Air conditioner temperature controlling method, temperature control equipment and air-conditioning
WO2019008946A1 (en) * 2017-07-07 2019-01-10 株式会社デンソー Vehicle air conditioning device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005274052A (en) * 2004-03-25 2005-10-06 Mitsubishi Electric Corp Air-conditioner
KR101105764B1 (en) 2004-12-18 2012-01-17 엘지전자 주식회사 Iudoor fan hot control apparatus of air conditioner and control method of the same
JP2007315641A (en) * 2006-05-24 2007-12-06 Matsushita Electric Ind Co Ltd Air conditioner
JP2011058734A (en) * 2009-09-10 2011-03-24 Chofu Seisakusho Co Ltd Method of controlling fan of air conditioner, and air conditioner
JP2011064432A (en) * 2009-09-18 2011-03-31 Chofu Seisakusho Co Ltd Fan control method for air temperature control device and the air temperature control device
JP2011127802A (en) * 2009-12-16 2011-06-30 Sanyo Electric Co Ltd Air conditioner
JP2012042211A (en) * 2011-11-29 2012-03-01 Chofu Seisakusho Co Ltd Method of controlling fan of air conditioner, and air conditioner
JP2013228114A (en) * 2012-04-24 2013-11-07 Panasonic Corp Range hood
JP2015025638A (en) * 2013-07-29 2015-02-05 ダイキン工業株式会社 Air blowing device
CN106440043A (en) * 2016-10-19 2017-02-22 珠海格力电器股份有限公司 Air conditioner and control method thereof
WO2019008946A1 (en) * 2017-07-07 2019-01-10 株式会社デンソー Vehicle air conditioning device
CN108006906A (en) * 2017-11-03 2018-05-08 特灵空调***(中国)有限公司 Air conditioner temperature controlling method, temperature control equipment and air-conditioning
CN108006906B (en) * 2017-11-03 2020-11-06 特灵空调***(中国)有限公司 Air conditioner temperature control method, temperature control device and air conditioner

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