JP3777110B2 - Bathroom heating system - Google Patents

Description

【００２４】
また、リモコン１１には、循環ファン２４の風量を「強」、「弱」、「微」の３段階で設定するための風量切替スイッチ（図示しない）と、暖房モードにおける目標温度を「高」、「中」、「低」の３段階で設定するための温度切替スイッチ（図示しない）が備えられている。そして、コントローラ２０は、該風量切替スイッチと該温度切替スイッチの操作に応じて、以下の表２に示したように、暖房モードにおいて切換える循環ファン２４の速数（Ａ，Ｂ，Ｃ）を１〜６の６段階で設定する。なお、速数の数字が大きくなるほど循環ファン２４の回転数が高く設定されている。
【００２５】
【表２】

【００２６】
暖房モードにおいて、コントローラ２０は、浴室内の温度を室温サーミスタ２９で検出し、浴室内の温度がリモコン１１で設定される「高」、「中」、「低」に対応して予め設定された目標温度に保たれるように、循環ファン２４の速数を切換える暖房運転を行う。以下、暖房運転におけるコントローラ２０の作動について説明する。
【００２７】
使用者がリモコン１１に備えられた運転モード切替スイッチを「暖房」に設定して、運転スイッチ（図示しない）をＯＮ操作すると、コントローラ２０は、熱動弁２２を開弁すると共に、熱源機ケーブル７を介して作動開始を指示する制御信号を熱源機６に送信する。
【００２８】
これにより、熱源機６が作動し、給湯往き管８ａを介して熱源機６から熱交換器２１に所定温度（例えば８０℃）の温水の供給が開始される。そして、コントローラ２０は、温水サーミスタ２８の検出温度が所定レベル以上（例えば４０℃以上）となったときに、循環ファン２４を作動させて浴室への温風の送出を開始する。
【００２９】
先ず、図３を参照して、コントローラ２０による暖房運転の第１の態様について説明する。本第１の態様においては、コントローラ２０は循環ファン２４を停止させずに暖房運転を実行する。そして、暖房運転中に循環ファン２４を停止しないことによって、循環ファン２４の停止時に浴室外からの隙間風や壁からの冷輻射により入浴者が冷風感を感じることを防止している。
【００３０】
図３の（ａ）は循環ファン２４の速数が切換わる様子を示したグラフであり、縦軸が循環ファン２４の速数（Ｎ）、横軸が時間（ｔ）に設定されている。また、図３の（ｂ）は浴室の温度の変化を示したグラフであり、縦軸が浴室の温度（Ｔ）、横軸が時間（ｔ）に設定されている。なお、（ａ）と（ｂ）の時間軸は共通である。また、（ｂ）のＴｓは上述した目標温度である。
【００３１】
コントローラ２０は、温水サーミスタ２８の検出温度が所定レベル以上となった時刻ｔ₁₁で、循環ファン２４を最速の「Ａ速」で回転させて暖房運転を開始して浴室内の温度を急速に目標温度（Ｔｓ）まで上昇させる。そして、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えた時刻ｔ₁₂で、コントローラ２０は、循環ファン２４の速数を「Ｂ速」に下げる。
【００３２】
そして、コントローラ２０は、予め定められた時間（ｔ₁₂〜ｔ₁₃）、循環ファン２４を「Ｂ速」で回転させ、該時間が経過した時刻ｔ₁₃で室温サーミスタ２９の検出温度と目標温度（Ｔａ）を比較する。
【００３３】
ここで、「Ａ速」と「Ｂ速」は、循環ファン２４の回転により吸気口２３から吸入される浴室内の空気によって、室温サーミスタ２９により浴室内の温度を検出することができる風量を生じさせる下限回転数よりも高い回転数に設定されている。そのため、「Ａ速」又は「Ｂ速」で循環ファン２４が回転しているときは、コントローラ２０は、室温サーミスタ２９により浴室の温度を常に検知することができる。
【００３４】
一方、「Ｃ速」（本発明の低速回転数に相当する）は上記下限回転数よりも低く設定されているため、「Ｃ速」で循環ファン２４が回転しているときには、コントローラ２０は、室温サーミスタ２９により浴室内の温度を検知することができない。
【００３５】
（ｂ）のグラフでは、時刻ｔ₁₃における室温サーミスタ２９の検出温度が目標温度（Ｔａ）を越えている。そして、これは、時刻ｔ₁₂で循環ファン２４の速数を「Ｂ速」に下げても、目標温度（Ｔｓ）に対して、浴室暖房装置１から浴室内に供給される熱量が多過ぎることを意味している。そこで、コントローラ２０は、時刻ｔ₁₃で循環ファン２４の速数をさらに「Ｃ速」まで下げて浴室内に供給される熱量を減少させ、浴室内の温度が目標温度（Ｔｓ）を超えて上昇することを抑制している。
【００３６】
また、コントローラ２０は、このように、循環ファン２４の回転数を「Ａ速」から「Ｂ速」、「Ｃ速」と予め定められた時間間隔をもって段階的に下げることによって、浴室暖房装置１から浴室内に供給される温風の風量が急に減少して入浴者が冷風感を感じることを防止している。
【００３７】
しかし、このように、循環ファン２４の速数を「Ｃ速」に下げると、コントローラ２０は室温サーミスタ２９により浴室の温度を検知することができなくなる。そこで、コントローラ２０は、予め定められた時間Ｘ₁（本発明の所定時間に相当する）が経過した時刻ｔ₁₄で、循環ファン２４の速数を室温サーミスタ２９により浴室の温度を検知することが可能な「Ｂ速」に上げる。
【００３８】
そして、吸気口２３から吸入される空気の流量が安定する時刻ｔ₁₅で、コントローラ２０は、室温サーミスタ２９の検出温度と目標温度（Ｔｓ）を比較する。（ｂ）のグラフでは、時刻ｔ₁₅における検出温度が目標温度（Ｔｓ）−２℃よりも低いので、コントローラ２０は、図中▲１▼で示したように循環ファン２４の速数を「Ａ速」に上げ、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えた時刻ｔ₁₆で、循環ファン２４の速数を「Ｂ速」に下げる。
【００３９】
一方、時刻ｔ₁₅における室温サーミスタ２９の検出温度が目標温度（Ｔｓ）−２℃以上で目標温度（Ｔｓ）以下であった場合は、コントローラ２０は、図中▲２▼で示したように循環ファン２４の速数を「Ｂ速」に維持する。そして、コントローラ２０は、その後、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えたときは循環ファン２４の速数を「Ｃ速」に下げ、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）−２℃よりも低くなったときには循環ファン２４の速数を「Ａ速」に上げる。
【００４０】
また、時刻ｔ₁₅における室温サーミスタ２９の検出温度が目標温度（Ｔｓ）よりも高かったとき、すなわち、時間Ｘ₁の間、循環ファン２４の速数を「Ｃ速」に下げても室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えていたときには、コントローラ２０は、図中▲３▼に示したように循環ファン２４の速数を再び「Ｃ速］に下げて時間Ｘ₁の経過を待つ。
【００４１】
そして、コントローラ２０は、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）以下となるまで、循環ファン２４の速数を「Ｃ速」で時間Ｘ₁の間回転させ、時間Ｘ₁の経過時に循環ファン２４の速数を「Ｂ速」に上げて室温サーミスタ２９の検出温度が目標温度（Ｔｓ）以下となったか否かを確認する処理を繰り返す。
【００４２】
以上説明したように、コントローラ２０は、循環ファン２４の速数を「Ｂ速」に下げても、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えるときには、循環ファン２４の速数を「Ｃ速」まで下げて浴室内に供給される熱量をさらに減少させる。そして、これにより、例えば、浴室暖房装置１の暖房能力に対して浴室が狭い場合や外気温と目標温度（Ｔｓ）との差が小さい場合であっても、コントローラ２０は、浴室の温度を目標温度（Ｔｓ）の付近に保って暖房運転を実行することができる。
【００４３】
なお、本第１の態様では、時刻ｔ₁₅で室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えていたときに、循環ファン２４の速数を再び「Ｃ速」に下げたが、図３の（ａ）の▲４▼に示したように、「Ｃ速」よりもさらに低い回転数で循環ファン２４を回転させるようにしてもよい。これにより、循環ファン２４の速数を「Ｃ速」まで下げてもなお浴室内に供給される熱量が多過ぎる場合に、浴室内に供給される熱量をさらに減少させて浴室内の温度の上昇を抑制することができる。そして、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）以下となるまで、このように、循環ファン２４の回転数を次第に下げることによって、浴室内の温度を目標温度（Ｔｓ）以下まで確実に低下させることができる。
【００４４】
また、「Ｂ速」から「Ｃ速」まで、或いは「Ｃ速」から「Ｃよりも低い回転数」まで、循環ファン２４の回転数を低下させるときに、所定の時間間隔をもって段階的に循環ファン２４の回転数を低下させるようにしてもよい。これにより、浴室暖房装置１から浴室内に供給される温風の風量が急に減少して、入浴者が冷風感を感じることを防止することができる。
【００４５】
次に、図４を参照して、コントローラ２０による暖房運転の第２の態様について説明する。本第２の形態においては、コントローラ２０は循環ファン２４を停止して暖房運転を実行する。
【００４６】
図４の（ｃ）は循環ファン２４の速数が切換わる様子を示したグラフであり、縦軸が循環ファン２４の速数（Ｎ）、横軸が時間（ｔ）に設定されている。また、図４の（ｄ）は浴室の温度の変化を示したグラフであり、縦軸が浴室の温度（Ｔ）、横軸が時間（ｔ）に設定されている。なお、（ｃ）と（ｄ）の時間軸は共通である。
【００４７】
コントローラ２０は、上述した第１の態様と同様に、温水サーミスタ２８の検出温度が所定レベル以上となった時刻ｔ₂₁で、循環ファン２４を最速の「Ａ速」で「回転」させて暖房運転を開始し、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えた時刻ｔ₂₂で、循環ファン２４の速数を「Ａ速」から「Ｂ速」に低下させる。
【００４８】
続いて、コントローラ２０は、予め定められた時間（ｔ₂₂〜ｔ₂₃）、循環ファン２４を「Ｂ速」で回転させ、該時間が経過した時刻ｔ₂₃で室温サーミスタ２９の検出温度と目標温度（Ｔｓ）とを比較する。そして、時刻ｔ₂₃で、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えているため、コントローラ２０は、循環ファン２４の速数を「Ｂ速」から「Ｃ速」に低下させて時間Ｘ₂の間、循環ファン２４を「Ｃ速」で回転させる。
【００４９】
そして、時間Ｘ₂が経過した時刻ｔ₂₄からｔ₂₅までの時間Ｘ₃の間、コントローラ２０は循環ファン２４を停止する。これにより、コントローラ２０は、浴室の温度が上昇することをさらに抑制している。続いて、コントローラ２０は、時刻ｔ₂₅で循環ファン２４の速数を「Ｃ速」に上げ、時刻ｔ₂₅から時間Ｘ₄が経過した時刻ｔ₂₆で循環ファン２４の速数を「Ｂ速」に上げる。なお、時刻ｔ₂₃〜ｔ₂₆の間は、循環ファン２４の回転数が上記下限回転数よりも低くなるため、室温サーミスタ２９により浴室の温度を検出することができない。また、時間Ｘ₂とＸ₃とＸ₄の合計時間が本発明の所定時間に相当する。
【００５０】
そして、コントローラ２０は、吸気口２３から吸入される空気の流量が安定する時刻ｔ₂₇で、室温サーミスタ２９の検出温度と目標温度（Ｔｓ）を比較する。（ｄ）のグラフでは、時刻ｔ₂₇における室温サーミスタ２９の検出温度が目標温度（Ｔｓ）−２℃よりも低いので、コントローラ２０は、図中▲５▼で示したように循環ファン２４の速数を「Ａ速」に上げ、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えた時刻ｔ₂₈で、循環ファン２４の速数を「Ｂ速」に下げる。
【００５１】
一方、時刻ｔ₂₇における室温サーミスタ２９の検出温度が目標温度（Ｔｓ）−２℃以上で目標温度（Ｔｓ）以下であった場合は、コントローラ２０は、図中▲６▼で示したように循環ファン２４の速数を「Ｂ速」に維持する。そして、コントローラ２０は、その後、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えたときは循環ファン２４の速数を「Ｃ速」に下げ、室温サーミスタ２９の検出温度が目標温度−２℃よりも低くなったときには循環ファン２４の速数を「Ａ速」に上げる。
【００５２】
また、時刻ｔ₂₇における室温サーミスタ２９の検出温度が目標温度（Ｔｓ）よりも高かったとき、すなわち、時間Ｘ₂の間、循環ファン２４の速数を「Ｃ速」とし、さらに時間Ｘ₃の間、循環ファン２４を停止しても、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えていたときには、コントローラ２０は、図中▲７▼に示したように再度循環ファン２４の速数を「Ｃ速」に下げる。そして、時間Ｘ₂が経過した時刻ｔ₂₈で、コントローラ２０は循環ファン２４を停止する。
【００５３】
そして、コントローラ２０は、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）以下となるまで、循環ファン２４を「Ｃ速」で時間Ｘ₂の間回転させた後に時間Ｘ₃の間停止し、時間Ｘ₃の経過時に循環ファン２４を「Ｃ速」で時間Ｘ₄の間回転させて「Ｂ速」に上げて、室温サーミスタ２９の検出温度が目標温度（Ｔｓ）以下となったか否かを確認する処理を繰り返す。
【００５４】
このように、コントローラ２０は、循環ファン２４の速数を「Ｃ速」に下げても室温サーミスタ２９の検出温度が目標温度（Ｔｓ）を超えると想定されるときには、循環ファン２４を停止して浴室への温風の送出を停止する。これにより、浴室の温度が下がり難い場合であっても浴室の温度を目標温度（Ｔｓ）以下まで確実に低下させることができる。
【００５５】
なお、本第２の態様においても、「Ｂ速」から「Ｃ速」、或いは「Ｃ速」から「停止」まで循環ファン２４の回転数を低下させるときに、所定の時間間隔をもって段階的に循環ファン２４の回転数を低下させるようにしてもよい。
【００５６】
また、本実施の形態では、上記下限回転数以下の「Ｃ速」を上記表（２）に示したように、予め定められた固定値としたが、暖房運転開始時の室温サーミスタ２９の検出温度の上昇度合が大きいほど、「Ｃ速」の回転数を低くするようにしてもよい。この場合、暖房運転開始時の室温サーミスタ２９の検出温度の上昇度合は浴室が狭いほど大きくなるため、一旦上昇した浴室内の温度が下がり難い状況にあるときに、「Ｃ速」の回転数をより低く設定して浴室内の温度を下げる効果を高めることができる。
【００５７】
また、本実施の形態においては、循環ファン２４を上記下限回転数以下の「Ｃ速」で回転させる時間Ｘ₁，Ｘ₂と、循環ファン２４を停止させる時間Ｘ₃を予め定められた固定値としたが、該時間Ｘ₁，Ｘ₂，Ｘ₃を暖房運転開始時の室温サーミスタ２９の検出温度の上昇度合が大きいほど長く設定し、浴室内に供給する熱量を減少させる時間を長くして浴室内の温度を低下させる効果を高めるようにしてもよい。
【００５８】
また、本実施の形態では、暖房運転において循環ファン２４の速数をＡ，Ｂ，Ｃの３段階で切換えたが、さらに多くの段階に切換えるようにしてもよい。
【図面の簡単な説明】
【図１】浴室暖房装置の設置状態を示した図。
【図２】図１に示した浴室暖房装置の全体構成図。
【図３】暖房運転時における循環ファンの速数の切換えと浴室の温度の推移を示したグラフ。
【図４】暖房運転時における循環ファンの速数の切換えと浴室の温度の推移を示したグラフ。
【符号の説明】
１…浴室暖房装置、３…浴室、６…熱源機、９…中間ダクト、１１…リモコン、２０…コントローラ、２１…熱交換器、２２…熱動弁、２４…循環ファン、２８…温水サーミスタ、２９…室温サーミスタ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bathroom heating device that heats a bathroom using hot water as a heat source.
[0002]
[Prior art]
Conventionally, there is a bathroom heating apparatus that includes a hot water type heat exchanger that is supplied with hot water at a predetermined temperature as a heat source, and that heats the air heated by the heat exchanger into the bathroom as warm air to heat the bathroom. Are known.
[0003]
In such a bathroom heating device, a temperature setting switch for setting the heating temperature desired by the user is provided, and after the heating operation is started, the temperature in the bathroom is set to the target temperature set by the temperature setting switch. Temperature control was performed so as to be maintained.
[0004]
The bathroom temperature sensor that detects the temperature in the bathroom is generally provided in a path through which the air in the bathroom is sucked by a circulation fan that circulates the air in the bathroom via the heat exchanger. However, in this case, in order to detect the temperature in the bathroom by the bathroom temperature sensor, the blower fan is rotated at a rotation speed of a certain level or more to generate an air volume that can introduce the air in the bathroom to the bathroom temperature sensor. It is necessary to let
[0005]
Therefore, in order to perform the heating operation while detecting the temperature in the bathroom by the bathroom temperature sensor, during the heating operation, the rotation speed of the blower fan generates the air volume necessary to introduce the air in the bathroom to the bathroom temperature sensor. It is required to keep the rotation speed above the lower limit rotational speed.
[0006]
However, if the bathroom is narrower than the heating capacity of the bathroom heating device, or if the difference between the target temperature and the outside air temperature is small, the temperature in the bathroom can be reduced even if the rotational speed of the blower fan is reduced to the lower limit rotational speed. May exceed the preset temperature, and in this case, there is a disadvantage that heating cannot be performed while keeping the temperature in the bathroom at the target temperature.
[0007]
[Problems to be solved by the invention]
The present invention provides a bathroom heating device that can solve the above inconveniences and can heat the bathroom while maintaining the inside of the bathroom at the target temperature even when the bathroom is small or when the difference between the target temperature and the outside air temperature is small. The purpose is to do.
[0008]
[Means for Solving the Problems]
The present invention has been made in order to achieve the above-described object, and includes a heat exchanger using hot water supplied at a predetermined temperature as a heat source, and sucking air through the heat exchanger and the heat exchanger. A fan that blows the air that has passed into the bathroom, a bathroom temperature sensor provided in an inflow path of air sucked by the fan, and the fan being operated in a state where hot water is supplied to the heat exchanger The air heated by passing through the heat exchanger is blown into the bathroom, and a heating operation is performed to control the rotational speed of the fan so that the temperature detected by the bathroom temperature sensor matches a predetermined target temperature. The present invention relates to an improvement of a bathroom heating device provided with heating control means.
[0009]
And the 1st aspect of this invention is a lower limit which the said heating control means produces the air volume which can detect the temperature in a bathroom by the said bathroom temperature sensor for the rotation speed of the said fan at the time of execution of the said heating operation. If the detected temperature of the bathroom temperature sensor exceeds the target temperature even when the rotational speed is decreased, the fan is operated at a low rotational speed set lower than the lower limit rotational speed for a predetermined time, and when the predetermined time has elapsed. The fan is operated at a rotation speed equal to or higher than the lower limit value to check whether or not the temperature detected by the bathroom temperature sensor is equal to or lower than the target temperature, and the temperature detected by the bathroom temperature sensor still exceeds the target temperature. The fan is operated at the low speed for the predetermined time until the temperature detected by the bathroom temperature sensor becomes equal to or lower than the target temperature, and when the predetermined time elapses, the fan is operated. The and repeating the process of detecting the temperature of the bath temperature sensor is operated at a rotational speed equal to or greater than the lower limit value to check whether or not equal to or less than the target temperature.
[0010]
According to the present invention, for example, when the difference between the target temperature and the outside air temperature is small, the detected temperature of the bathroom temperature sensor even if the rotational speed of the fan is reduced to the lower limit rotational speed during the heating operation. When the temperature exceeds the target temperature, the heating control means rotates the fan at the low speed that is set lower than the lower limit speed.
[0011]
Thereby, the amount of heat released from the bathroom heating device into the bathroom can be further reduced, and an increase in the temperature in the bathroom can be suppressed. Then, the heating control means rotates the fan at the low speed rotation speed for the predetermined time and then rotates the fan at the lower limit rotation speed to determine whether the temperature detected by the bathroom temperature sensor is equal to or lower than the target temperature. By repeating the process of checking, the temperature in the bathroom can be lowered to the target temperature.
[0012]
In addition, according to a second aspect of the present invention, the heating control means has a lower limit for generating an air volume that allows the temperature of the fan to be detected by the bathroom temperature sensor when the heating operation is performed. If the detected temperature of the bathroom temperature sensor exceeds the target temperature even when the rotational speed is decreased, the fan is operated at a low rotational speed set lower than the lower limit rotational speed for a predetermined time, and when the predetermined time has elapsed. The fan is operated at a rotation speed equal to or higher than the lower limit value to check whether or not the temperature detected by the bathroom temperature sensor is equal to or lower than the target temperature, and the temperature detected by the bathroom temperature sensor still exceeds the target temperature. When the detected temperature of the bathroom temperature sensor becomes equal to or lower than the target temperature, the fan rotational speed is gradually decreased from the low speed rotational speed every predetermined time, and the predetermined time The fan is operated at a rotational speed equal to or greater than the lower limit in the over-time detection temperature of the bath temperature sensor is characterized in that it checks whether a following said target temperature.
[0013]
According to the present invention, the heating control means, in the heating operation, when the detected temperature of the bathroom temperature sensor exceeds the target temperature even if the rotation speed of the fan is reduced to the lower limit rotation speed, Until the temperature detected by the bathroom temperature sensor becomes equal to or lower than the target temperature, the rotational speed of the fan is gradually decreased from the low-speed rotational speed every predetermined time. Therefore, it can suppress reliably that the temperature in a bathroom continues exceeding the said target temperature, and can reduce the temperature in a bathroom to below the said target temperature.
[0014]
The low-speed rotation speed in the first aspect and the second aspect includes a rotation speed of 0 that stops the fan.
[0015]
Further, in the first aspect and the second aspect, the heating control means sets the low-speed rotation speed to be lower as the degree of increase in the temperature detected by the bathroom temperature sensor during the heating operation is larger. Features.
[0016]
In the present invention, the degree of increase in the temperature detected by the bathroom temperature sensor during the heating operation increases as the bathroom is narrower. And the said heating control means sets the said low speed rotation speed so that the increase degree of the detection temperature of the said bathroom temperature sensor at the time of the said heating operation is large, ie, a bathroom is narrow. Accordingly, when the fan is rotated at the low speed, the amount of heat supplied from the bathroom heating device into the bathroom is reduced as the bathroom is narrowed, and the effect of lowering the temperature in the bathroom can be enhanced. .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
An example of an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing an installation state of a bathroom heating device of the present invention, FIG. 2 is an overall configuration diagram of the bathroom heating device shown in FIG. 1, and FIGS. 3 and 4 are speed switching of a circulation fan during heating operation. It is the graph which showed transition of the temperature in a bathroom.
[0018]
Referring to FIG. 1, a bathroom heating device 1 is installed on a ceiling portion of a bathroom 3 provided with a bathtub 2, and is operated by electric power supplied from a commercial power outlet 4 through a breaker 5. The bathroom heating device 1 is communicably connected to the heat source unit 6 and the heat source unit cable 7, and hot water of a predetermined temperature is supplied from the heat source unit 6 to the bathroom heating unit 1 through a hot water supply pipe 8a. It returns to the heat source machine 6 through the return pipe 8b.
[0019]
Furthermore, an intermediate duct 9 for ventilating the bathroom 3 communicates with the bathroom heating device 1, and a remote controller 11 for setting an operation mode and the like is connected via a remote control cable 10.
[0020]
Next, referring to FIG. 2, the bathroom heating device 1 includes a controller 20 (including the function of the heating control means of the present invention) that controls the overall operation of the bathroom heating device 1, and a hot water supply pipe 8 a. The heat exchanger 21 that heats air using the supplied hot water as a heat source, the thermal valve 22 that opens and closes the hot water supply pipe 8a, and the air sucked from the air inlet 23 is heated by the heat exchanger 21 as hot air in the bathroom. Circulating fan 24 to be sent out (corresponding to the fan of the present invention), fan motor 25 for operating the circulating fan 24, looper 26 for setting the direction of the air to be sent out, looper motor 27 for operating the looper 26, heat source machine 6, a hot water thermistor 28 for detecting the temperature of the hot water supplied from 6, a room temperature thermistor 29 for detecting the temperature of the air in the bathroom (= bathroom temperature) sucked from the air inlet 23, and the earth leakage breaker 3 Comprises a remote control connector 31, the heat source equipment connector 32, power supply connector 33, and an intermediate duct fan connector 34.
[0021]
In addition, an intermediate duct fan 40 is installed in the middle of the intermediate duct 9, and the controller 20 transmits a control signal to the intermediate duct fan 40 via the intermediate duct fan connector 34 and the intermediate duct fan cable 41. The operation / stop of the intermediate duct fan 40 is controlled.
[0022]
The controller 20 performs “heating”, “cool air”, “drying”, “ventilation”, and “freezing” shown in Table 1 below according to the operation of an operation mode changeover switch (not shown) provided in the remote controller 11. The bathroom heating device 1 is operated in each operation mode of “prevention”.
[0023]
[Table 1]

[0024]
Further, the remote controller 11 has an air volume changeover switch (not shown) for setting the air volume of the circulation fan 24 in three stages of “strong”, “weak”, and “fine”, and the target temperature in the heating mode is “high”. , A temperature changeover switch (not shown) for setting in three stages of “medium” and “low” is provided. Then, the controller 20 changes the speed (A, B, C) of the circulation fan 24 to be switched in the heating mode to 1 in accordance with the operation of the air volume change switch and the temperature change switch as shown in Table 2 below. Set in 6 stages of ~ 6. It should be noted that the rotational speed of the circulation fan 24 is set higher as the speed number increases.
[0025]
[Table 2]

[0026]
In the heating mode, the controller 20 detects the temperature in the bathroom with the room temperature thermistor 29, and the temperature in the bathroom is set in advance corresponding to “high”, “medium”, and “low” set by the remote controller 11. A heating operation for switching the speed of the circulation fan 24 is performed so that the target temperature is maintained. Hereinafter, the operation of the controller 20 in the heating operation will be described.
[0027]
When the user sets the operation mode change switch provided in the remote controller 11 to “heating” and turns on the operation switch (not shown), the controller 20 opens the thermal valve 22 and the heat source machine cable. A control signal instructing the start of operation is transmitted to the heat source unit 6 via 7.
[0028]
As a result, the heat source unit 6 is activated, and supply of hot water at a predetermined temperature (for example, 80 ° C.) is started from the heat source unit 6 to the heat exchanger 21 via the hot water supply pipe 8a. Then, when the temperature detected by the hot water thermistor 28 becomes equal to or higher than a predetermined level (for example, 40 ° C. or higher), the controller 20 starts the circulation fan 24 to start sending hot air to the bathroom.
[0029]
First, with reference to FIG. 3, the 1st aspect of the heating operation by the controller 20 is demonstrated. In the first aspect, the controller 20 performs the heating operation without stopping the circulation fan 24. In addition, by not stopping the circulation fan 24 during the heating operation, the bather is prevented from feeling a cold wind due to the gap air from outside the bathroom or the cold radiation from the wall when the circulation fan 24 is stopped.
[0030]
FIG. 3A is a graph showing how the speed of the circulation fan 24 is switched. The vertical axis indicates the speed (N) of the circulation fan 24 and the horizontal axis indicates time (t). FIG. 3B is a graph showing changes in bathroom temperature, where the vertical axis is set to the bathroom temperature (T) and the horizontal axis is set to time (t). The time axes of (a) and (b) are common. Moreover, Ts of (b) is the target temperature mentioned above.
[0031]
The controller 20 starts the heating operation by rotating the circulation fan 24 at the fastest “A speed” at the time t ₁₁ when the detected temperature of the hot water thermistor 28 becomes equal to or higher than a predetermined level, and rapidly sets the temperature in the bathroom. Increase to temperature (Ts). Then, at time t ₁₂ when the detected temperature of the room temperature thermistor 29 exceeds the target temperature (Ts), the controller 20 reduces the speed of the circulation fan 24 to “B speed”.
[0032]
Then, the controller 20 rotates the circulation fan 24 at “B speed” for a predetermined time (t _{12 to} t ₁₃ ), and at the time t ₁₃ when the time has elapsed, the detected temperature and the target temperature ( Ta) is compared.
[0033]
Here, the “A speed” and the “B speed” generate an air volume by which the room temperature thermistor 29 can detect the temperature in the bathroom by the air in the bathroom sucked from the air inlet 23 by the rotation of the circulation fan 24. The rotation speed is set to be higher than the lower limit rotation speed to be caused. Therefore, when the circulation fan 24 is rotating at “A speed” or “B speed”, the controller 20 can always detect the temperature of the bathroom by the room temperature thermistor 29.
[0034]
On the other hand, since “C speed” (corresponding to the low speed rotation speed of the present invention) is set lower than the lower limit rotation speed, when the circulation fan 24 is rotating at “C speed”, the controller 20 The room temperature thermistor 29 cannot detect the temperature in the bathroom.
[0035]
In the graph of (b), the temperature detected by the room temperature thermistor 29 at time t ₁₃ exceeds the target temperature (Ta). And even if this lowers the speed of the circulation fan 24 to “B speed” at time t ₁₂ , the amount of heat supplied from the bathroom heating device 1 to the bathroom is too much with respect to the target temperature (Ts). Means. Therefore, the controller 20 further decreases the speed of the circulation fan 24 to “C speed” at time t ₁₃ to reduce the amount of heat supplied into the bathroom, and the temperature in the bathroom rises above the target temperature (Ts). To suppress.
[0036]
In addition, the controller 20 reduces the rotational speed of the circulation fan 24 from “A speed” to “B speed” and “C speed” step by step at predetermined time intervals in this way, thereby heating the bathroom heating device 1. The amount of hot air supplied to the bathroom suddenly decreases, preventing the bather from feeling cold.
[0037]
However, when the speed of the circulation fan 24 is lowered to “C speed” in this way, the controller 20 cannot detect the temperature of the bathroom by the room temperature thermistor 29. Therefore, the controller 20, at time t ₁₄ to time the predetermined X ₁ (corresponding to a predetermined time of the present invention) has elapsed, that detects the temperature of the bath by room temperature thermistor 29 fast speed of the circulation fan 24 Increase to possible "B speed".
[0038]
The controller 20 compares the detected temperature of the room temperature thermistor 29 with the target temperature (Ts) at time t ₁₅ when the flow rate of the air drawn from the air inlet 23 is stabilized. In the graph of (b), since the detected temperature at time t ₁₅ is lower than the target temperature (Ts) −2 ° C., the controller 20 sets the speed of the circulation fan 24 to “A” as indicated by (1) in the figure. The speed of the circulation fan 24 is decreased to “B speed” at time t ₁₆ when the detected temperature of the room temperature thermistor 29 exceeds the target temperature (Ts).
[0039]
On the other hand, when the temperature detected by the room temperature thermistor 29 at time t ₁₅ is not less than the target temperature (Ts) −2 ° C. and not more than the target temperature (Ts), the controller 20 circulates as indicated by (2) in the figure. The speed of the fan 24 is maintained at “B speed”. After that, when the detected temperature of the room temperature thermistor 29 exceeds the target temperature (Ts), the controller 20 reduces the speed of the circulation fan 24 to “C speed”, and the detected temperature of the room temperature thermistor 29 becomes the target temperature (Ts). ) When the temperature is lower than -2 ° C, the speed of the circulation fan 24 is increased to "A speed".
[0040]
Further, when the detected temperature of the room temperature thermistor 29 at the time t ₁₅ is higher than the target temperature (Ts), that is, during the time X ₁ , the room temperature thermistor 29 even if the speed of the circulation fan 24 is lowered to “C speed”. When the detected temperature exceeds the target temperature (Ts), the controller 20 reduces the speed of the circulation fan 24 to “C speed” again as indicated by (3) in the figure, and the time X ₁ has elapsed. wait.
[0041]
Then, the controller 20 rotates the speed of the circulation fan 24 at “C speed” for the time X ₁ until the temperature detected by the room temperature thermistor 29 becomes equal to or lower than the target temperature (Ts), and circulates when the time X ₁ elapses. The speed of the fan 24 is increased to “B speed”, and the process of confirming whether or not the detected temperature of the room temperature thermistor 29 is equal to or lower than the target temperature (Ts) is repeated.
[0042]
As described above, the controller 20 reduces the speed of the circulation fan 24 when the detected temperature of the room temperature thermistor 29 exceeds the target temperature (Ts) even if the speed of the circulation fan 24 is lowered to “B speed”. The amount of heat supplied to the bathroom is further reduced by lowering to "C speed". Thus, for example, even when the bathroom is narrow with respect to the heating capacity of the bathroom heating device 1 or when the difference between the outside air temperature and the target temperature (Ts) is small, the controller 20 sets the target temperature of the bathroom. The heating operation can be executed while being kept near the temperature (Ts).
[0043]
In the first mode, when the temperature detected by the room temperature thermistor 29 exceeds the target temperature (Ts) at time t ₁₅ , the speed of the circulation fan 24 is lowered to “C speed” again. As shown in (4) of 3 (a), the circulation fan 24 may be rotated at a lower rotational speed than the “C speed”. As a result, if the amount of heat supplied to the bathroom is still too much even if the speed of the circulation fan 24 is lowered to “C speed”, the amount of heat supplied to the bathroom is further reduced to increase the temperature in the bathroom. Can be suppressed. Then, until the detected temperature of the room temperature thermistor 29 becomes equal to or lower than the target temperature (Ts), the temperature in the bathroom is surely lowered to the target temperature (Ts) or less by gradually decreasing the rotational speed of the circulation fan 24 in this way. Can be made.
[0044]
Further, when the rotational speed of the circulation fan 24 is decreased from “B speed” to “C speed”, or from “C speed” to “rotational speed lower than C”, it is circulated in stages at predetermined time intervals. The rotational speed of the fan 24 may be reduced. Thereby, the amount of warm air supplied from the bathroom heating device 1 into the bathroom is suddenly reduced, and the bather can be prevented from feeling a feeling of cold air.
[0045]
Next, a second aspect of the heating operation by the controller 20 will be described with reference to FIG. In the second embodiment, the controller 20 stops the circulation fan 24 and executes the heating operation.
[0046]
FIG. 4C is a graph showing how the speed of the circulation fan 24 is switched. The vertical axis is set to the speed (N) of the circulation fan 24 and the horizontal axis is set to time (t). FIG. 4D is a graph showing changes in bathroom temperature, where the vertical axis is the bathroom temperature (T) and the horizontal axis is the time (t). Note that the time axes of (c) and (d) are common.
[0047]
Similarly to the first aspect described above, the controller 20 performs the heating operation by “rotating” the circulation fan 24 at the fastest “A speed” at time t ₂₁ when the detected temperature of the hot water thermistor 28 becomes equal to or higher than a predetermined level. And the speed of the circulation fan 24 is reduced from “A speed” to “B speed” at time t ₂₂ when the detected temperature of the room temperature thermistor 29 exceeds the target temperature (Ts).
[0048]
Subsequently, the controller 20 rotates the circulation fan 24 at “B speed” for a predetermined time (t _{22 to} t ₂₃ ), and the detected temperature and the target temperature of the room temperature thermistor 29 at the time t ₂₃ when the time has elapsed. (Ts) is compared. Then, at time t _23, at room temperature since the detection temperature of the thermistor 29 exceeds a target temperature (Ts), the controller 20, the circulation fans time by reducing the speed number "C speed" from the "B speed" of 24 During X ₂ , the circulation fan 24 is rotated at “C speed”.
[0049]
The controller 20 stops the circulation fan 24 during the time X ₃ from the time t ₂₄ to the time t ₂₅ when the time X ₂ has elapsed. Thereby, the controller 20 has further suppressed that the temperature of a bathroom rises. Subsequently, the controller 20 increases the speed of the circulation fan 24 to “C speed” at time t ₂₅ , and sets the speed of the circulation fan 24 to “B speed” at time t ₂₆ when time X ₄ has elapsed from time t _25. Raise to. Incidentally, during the time t ₂₃ ~t _26, since the rotation speed of the circulation fan 24 is lower than the lower limit rotation speed, it is impossible to detect the temperature of the bath by room temperature thermistor 29. Further, the total time of the times X ₂ , X ₃ and X ₄ corresponds to the predetermined time of the present invention.
[0050]
Then, the controller 20 compares the detected temperature of the room temperature thermistor 29 with the target temperature (Ts) at time t ₂₇ when the flow rate of the air sucked from the air inlet 23 is stabilized. In the graph of (d), since the temperature detected by the room temperature thermistor 29 at time t ₂₇ is lower than the target temperature (Ts) −2 ° C., the controller 20 indicates the speed of the circulation fan 24 as indicated by (5) in the figure. The number is increased to “A speed”, and at time t _{28 when the} temperature detected by the room temperature thermistor 29 exceeds the target temperature (Ts), the speed of the circulation fan 24 is decreased to “B speed”.
[0051]
On the other hand, when the temperature detected by the room temperature thermistor 29 at time t ₂₇ is equal to or less than the target temperature (Ts) at the target temperature (Ts) -2 ° C. or higher, the controller 20 is circulated as shown in ▲ 6 in ▼ FIG The speed of the fan 24 is maintained at “B speed”. After that, when the detected temperature of the room temperature thermistor 29 exceeds the target temperature (Ts), the controller 20 reduces the speed of the circulation fan 24 to “C speed”, and the detected temperature of the room temperature thermistor 29 becomes the target temperature −2. When the temperature is lower than ° C., the speed of the circulation fan 24 is increased to “A speed”.
[0052]
Further, when the detected temperature of the room temperature thermistor 29 at the time t ₂₇ is higher than the target temperature (Ts), that is, during the time X ₂ , the speed of the circulation fan 24 is set to “C speed”, and further at time X ₃ . If the detected temperature of the room temperature thermistor 29 exceeds the target temperature (Ts) even if the circulation fan 24 is stopped, the controller 20 again determines the speed of the circulation fan 24 as indicated by (7) in the figure. To “C-speed”. The controller 20 stops the circulation fan 24 at time t ₂₈ when the time X ₂ has elapsed.
[0053]
Then, the controller 20 rotates the circulation fan 24 at “C speed” for the time X ₂ and stops for the time X ₃ until the temperature detected by the room temperature thermistor 29 becomes equal to or lower than the target temperature (Ts). When X ₃ has elapsed, the circulation fan 24 is rotated at “C speed” for a time X ₄ to raise it to “B speed”, and it is confirmed whether or not the detected temperature of the room temperature thermistor 29 has become equal to or lower than the target temperature (Ts). Repeat the process.
[0054]
As described above, the controller 20 stops the circulation fan 24 when the detected temperature of the room temperature thermistor 29 is assumed to exceed the target temperature (Ts) even if the speed of the circulation fan 24 is lowered to “C speed”. Stop sending hot air to the bathroom. Thereby, even if it is a case where the temperature of a bathroom is hard to fall, the temperature of a bathroom can be reliably reduced to below target temperature (Ts).
[0055]
Also in the second mode, when the rotational speed of the circulation fan 24 is decreased from “B speed” to “C speed” or from “C speed” to “stop”, it is stepwise with a predetermined time interval. You may make it reduce the rotation speed of the circulation fan 24. FIG.
[0056]
In the present embodiment, the “C speed” equal to or lower than the lower limit rotational speed is set to a predetermined fixed value as shown in the above table (2). However, the room temperature thermistor 29 is detected when the heating operation is started. You may make it make the rotation speed of "C speed" low, so that the raise degree of temperature is large. In this case, the degree of increase in the detected temperature of the room temperature thermistor 29 at the start of heating operation increases as the bathroom becomes narrower. Therefore, when the temperature in the bathroom once increased is difficult to decrease, the rotation speed of “C-speed” is set. The effect of lowering the temperature in the bathroom can be enhanced by setting it lower.
[0057]
Further, in the present embodiment, the time X ₁ and X ₂ for rotating the circulation fan 24 at “C speed” equal to or lower than the lower limit rotation speed and the time X ₃ for stopping the circulation fan 24 are set to predetermined fixed values. However, the time X ₁ , X ₂ , X ₃ is set longer as the degree of increase in the temperature detected by the room temperature thermistor 29 at the start of heating operation is increased, and the time for reducing the amount of heat supplied into the bathroom is lengthened. You may make it raise the effect which reduces the temperature in a bathroom.
[0058]
In the present embodiment, the speed of the circulation fan 24 is switched in three stages of A, B, and C in the heating operation, but it may be switched to more stages.
[Brief description of the drawings]
FIG. 1 is a diagram showing an installation state of a bathroom heating device.
2 is an overall configuration diagram of the bathroom heating device shown in FIG. 1. FIG.
FIG. 3 is a graph showing the change in the speed of the circulation fan and the transition of the bathroom temperature during heating operation.
FIG. 4 is a graph showing the change in the speed of the circulation fan and the transition of the bathroom temperature during heating operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Bathroom heating apparatus, 3 ... Bathroom, 6 ... Heat source machine, 9 ... Intermediate duct, 11 ... Remote control, 20 ... Controller, 21 ... Heat exchanger, 22 ... Thermal valve, 24 ... Circulation fan, 28 ... Hot water thermistor, 29 ... Room temperature thermistor

Claims (3)

A heat exchanger that uses hot water supplied at a predetermined temperature as a heat source, a fan that sucks air through the heat exchanger and blows the air that has passed through the heat exchanger into the bathroom, and is sucked by the fan A bathroom temperature sensor provided in the inflow path of the air to be heated, and air heated through the heat exchanger by operating the fan while hot water is supplied to the heat exchanger. In the bathroom heating device comprising heating control means for performing a heating operation for controlling the rotation speed of the fan so that the detected temperature of the bathroom temperature sensor coincides with a predetermined target temperature,
Even when the heating control means reduces the rotation speed of the fan to the lower limit rotation speed that generates an air volume that can detect the temperature in the bathroom by the bathroom temperature sensor during the heating operation, the bathroom temperature sensor When the detected temperature exceeds the target temperature, the fan is operated at a low speed that is set lower than the lower limit rotational speed for a predetermined time, and when the predetermined time has elapsed, the fan is operated at a rotational speed that is equal to or higher than the lower limit value. It is activated to check whether the detected temperature of the bathroom temperature sensor is equal to or lower than the target temperature. When the detected temperature of the bathroom temperature sensor still exceeds the target temperature, the detected temperature of the bathroom temperature sensor is The fan is operated at the low speed for the predetermined time until the temperature is equal to or lower than the target temperature, and the fan is operated at the speed equal to or higher than the lower limit when the predetermined time elapses. Bathroom heater device detects temperature of the bath temperature sensor by the and repeating the process of confirming whether or not equal to or less than the target temperature. A heat exchanger that uses hot water supplied at a predetermined temperature as a heat source, a fan that sucks air through the heat exchanger and blows the air that has passed through the heat exchanger into the bathroom, and is sucked by the fan A bathroom temperature sensor provided in the inflow path of the air to be heated, and air heated through the heat exchanger by operating the fan while hot water is supplied to the heat exchanger. In the bathroom heating device comprising heating control means for performing a heating operation for controlling the rotation speed of the fan so that the detected temperature of the bathroom temperature sensor coincides with a predetermined target temperature,
Even when the heating control means reduces the rotation speed of the fan to the lower limit rotation speed that generates an air volume that can detect the temperature in the bathroom by the bathroom temperature sensor during the heating operation, the bathroom temperature sensor When the detected temperature exceeds the target temperature, the fan is operated at a low speed that is set lower than the lower limit rotational speed for a predetermined time, and when the predetermined time has elapsed, the fan is operated at a rotational speed that is equal to or higher than the lower limit value. It is activated to check whether the detected temperature of the bathroom temperature sensor is equal to or lower than the target temperature. When the detected temperature of the bathroom temperature sensor still exceeds the target temperature, the detected temperature of the bathroom temperature sensor is The rotational speed of the fan is gradually decreased from the low-speed rotational speed every predetermined time until the temperature becomes equal to or lower than the target temperature, and when the predetermined time has elapsed, the fan is moved to the lower limit. Bathroom heating apparatus characterized by detecting the temperature of the bath temperature sensor is operated at a higher rotational speed to check whether it is equal to or less than the target temperature. 3. The bathroom heating device according to claim 1, wherein the heating control unit sets the low-speed rotation number to be lower as the degree of increase in the temperature detected by the bathroom temperature sensor during the heating operation is larger. .

Images