JP4830632B2 - Air conditioner - Google Patents
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- JP4830632B2 JP4830632B2 JP2006143847A JP2006143847A JP4830632B2 JP 4830632 B2 JP4830632 B2 JP 4830632B2 JP 2006143847 A JP2006143847 A JP 2006143847A JP 2006143847 A JP2006143847 A JP 2006143847A JP 4830632 B2 JP4830632 B2 JP 4830632B2
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Description
本発明は、暖房運転時の立ち上がり性能を向上させるために、外気温度に応じて送風フ
ァンの回転数を制御することを特徴とする空気調和機。
The present invention is an air conditioner that controls the rotational speed of a blower fan in accordance with the outside air temperature in order to improve the start-up performance during heating operation.
従来、この種の空気調和機において、冷房運転や暖房運転の開始時に、冷房能力および暖房能力不足とならないよう、外気温に応じて圧縮機の初期の運転周波数の上限値や下限値を設定することを特徴とするものがあった(例えば、特許文献1参照)。 Conventionally, in this type of air conditioner, at the start of cooling operation or heating operation, an upper limit value or a lower limit value of the initial operation frequency of the compressor is set according to the outside air temperature so that the cooling capacity and the heating capacity are not insufficient. There was a thing characterized by this (for example, refer patent document 1).
また、暖房運転時の立ち上がり性能向上および暖房運転時の足元暖房感を向上させるための方策としては、室内機の吹出口の吹出面積を狭くして風量を減少させ、同時に圧縮機の運転周波数を上げることにより凝縮温度を高くして吹出空気温度を上げ、吹出空気温度と輻射温度に基づいた風量制御を行っていた(例えば、特許文献2参照)。 In addition, as a measure to improve the start-up performance during heating operation and to improve the feeling of foot heating during heating operation, reduce the air volume by reducing the blowout area of the outlet of the indoor unit, and at the same time reduce the operating frequency of the compressor Increasing the condensation temperature to raise the blown air temperature, and controlling the air volume based on the blown air temperature and the radiation temperature (see, for example, Patent Document 2).
図4は、特許文献1に記載された従来の空気調和機の暖房運転時の外気温度に対する初期周波数、上限周波数、下限周波数の補正特性を示す図である。図4に示すように、基準外気温度よりも外気温度が高くなるにつれて必要な暖房能力は小さくなるため、徐々に初期周波数、上限周波数、下限周波数を低く設定するようにしている。
FIG. 4 is a diagram illustrating correction characteristics of the initial frequency, the upper limit frequency, and the lower limit frequency with respect to the outside air temperature during the heating operation of the conventional air conditioner described in
さらに、従来制御としては、室内熱交換器温度を検出し、室内熱交換器温度の上昇に応じて室内機の送風ファンの回転数を閾値毎にステップ状に変更させ、暖房時の吹出空気による冷風感を緩和するようにしている。 Furthermore, as conventional control, the temperature of the indoor heat exchanger is detected, and the number of rotations of the blower fan of the indoor unit is changed stepwise for each threshold according to the increase in the indoor heat exchanger temperature. I try to alleviate the cold wind.
図5は、従来の空気調和機の暖房運転時の室内熱交換器温度と室内機の送風ファンの回転数との相関を示す図である。図5に示すように、室内熱交換器温度の上昇に応じて室内機の送風ファンの回転数を室内熱交換器温度の閾値毎に、回転数1、回転数2、回転数3とステップ状に変更している。
しかしながら、前記従来の構成では、次のような課題があった。即ち、運転開始時は必要な能力に応じた周波数に設定可能であるが、特に外気温が低い時には、運転可能な電流制限値があるためその周波数まで上昇しないことがあり、結果として室温がある程度まで上昇するまで絶対的な暖房能力不足となる場合があった。 However, the conventional configuration has the following problems. That is, at the start of operation, the frequency can be set according to the required capacity, but when the outside air temperature is low, there is a current limit value that can be operated, so the frequency may not rise, and as a result the room temperature is somewhat There was a case where the absolute heating capacity was insufficient until it rose.
一方、室内熱交換器温度の上昇に応じて室内機の送風ファンの回転数を閾値毎にステップ状に変更させる方式では、次のような課題があった。即ち、室内熱交換器の温度が低くて送風ファンの回転数が低い場合には、風が部屋の下部にまで届かずに足元暖房感が損なわれることがあった。 On the other hand, the method of changing the rotation speed of the blower fan of the indoor unit in a stepwise manner for each threshold according to the rise in the indoor heat exchanger temperature has the following problems. That is, when the temperature of the indoor heat exchanger is low and the rotational speed of the blower fan is low, the wind does not reach the lower part of the room and the feeling of foot heating may be impaired.
また、雪の日など外気温が低い場合には、暖房運転開始とともに室外熱交換器への急速な着霜の進行により蒸発温度が低下することから、凝縮温度の上昇が妨げられて室内熱交換器温度が設定の送風ファンの回転数となる温度領域まで上昇せずに下がり始めるようになることがある。そのために、送風ファンの回転数が低いままで絶対的な暖房能力不足となり、部屋全体の温度がなかなか上昇せず、暖房時の立ち上がり性能が悪くなる傾向にあった。この場合には、送風ファンの回転数が低くて吹出空気温度が低いために暖房感が得られないばかりでなく、部屋の温度上昇が極端に悪くなり、設定の室温に到達する前に除霜運転が開始されてますます室温の上昇が遅くなるという悪循環に陥ることもまれにあった。 In addition, when the outdoor temperature is low, such as on a snowy day, the evaporation temperature decreases due to the rapid frost formation on the outdoor heat exchanger as the heating operation starts. The chamber temperature may begin to decrease without increasing to the temperature range where the rotation speed of the set blower fan is reached. For this reason, the absolute heating capacity is insufficient with the rotation speed of the blower fan being low, the temperature of the entire room does not rise easily, and the startup performance during heating tends to be poor. In this case, the rotation speed of the blower fan is low and the temperature of the blown air is low, so not only a feeling of heating is not obtained, but the temperature rise in the room becomes extremely bad, and defrosting is performed before reaching the set room temperature. In rare cases, the operation started and a vicious cycle occurred in which the rise in room temperature became slower.
また、ステップ状に規定されている送風ファンの回転数を単純に増加させた場合、ある閾値を超えて送風ファンの回転数が上がると、ステップ状に変更させるがゆえに、風量差が大きく、室内熱交換器温度が極端に低下し、それに伴って再度、送風ファンの回転数が低下する可能性があった。 In addition, when the rotational speed of the blower fan specified in a step shape is simply increased, if the rotational speed of the blower fan increases beyond a certain threshold value, the air flow difference is large due to the change in the step shape. There was a possibility that the temperature of the heat exchanger was extremely lowered, and the rotational speed of the blower fan was lowered again.
本発明は、前記従来の課題を解決するもので、暖房運転時の立ち上がり性能を向上させるために、外気温検出手段により検出された外気温度が所定値以下の場合に、ある特定の閾値間のみ送風ファンの回転数を段階的に増加させ、最終的には閾値で規定されている回転数に調整することを特徴とする空気調和機を提供することを目的とする。 The present invention solves the above-mentioned conventional problems, and in order to improve the start-up performance during heating operation, when the outside air temperature detected by the outside air temperature detecting means is equal to or less than a predetermined value, only between certain threshold values. An object of the present invention is to provide an air conditioner characterized in that the rotational speed of the blower fan is increased stepwise and finally adjusted to the rotational speed defined by the threshold value.
前記従来の課題を解決するために、本発明の空気調和機は、室内熱交換器と、送風ファンと、空気吹出口に取り付けられた吹出し空気の風向きを変化させる風向変更手段と、前記室内熱交換器の温度を検出する室内熱交換器温度検出手段と、外気温を検出する外気温検出手段とを有する室内機を備えた空気調和機であって、室内熱交換器温度に基づいて前記送風ファンの回転数がステップ状に変更されるとともに、外気温が所定値以下の時は、各ステップを決定する室内熱交換器温度の閾値間に前記室内熱交換器の温度がある場合は前記送風ファンの回転数を一定として、前記室内熱交換器の温度が閾値を越えた場合は前記送風ファンの回転数を増加または減少させ、前記室内熱交換器の温度がある特定の閾値間にある場合は前記送風ファンの回転数を時間に応じて段階的に増加または減少させ、前記ある特定の閾値間とは、前記送風ファンの回転数が増加時は、リモコンで設定した送風ファンの回転数に移行する直前のステップを決定する室内熱交換器の閾値間とし、前記送風ファンの回転数が減少時は、リモコンで設定した送風ファンの回転数から移行した直後のステップを決定する室内熱交換器の閾値間であることを特徴とするものである。 In order to solve the conventional problems, an air conditioner according to the present invention includes an indoor heat exchanger, a blower fan, a wind direction changing unit that changes a wind direction of blown air attached to an air outlet, and the indoor heat. An air conditioner comprising an indoor unit having an indoor heat exchanger temperature detecting means for detecting the temperature of an exchanger and an outside air temperature detecting means for detecting an outside air temperature, the air blower based on the indoor heat exchanger temperature When the rotational speed of the fan is changed in steps, and the outside air temperature is equal to or lower than a predetermined value, if the temperature of the indoor heat exchanger is between the threshold values of the indoor heat exchanger temperature that determines each step, the air flow When the rotation speed of the fan is constant and the temperature of the indoor heat exchanger exceeds a threshold value, the rotation speed of the blower fan is increased or decreased, and the temperature of the indoor heat exchanger is between a certain threshold value Is the blower fan Depending the number of revolutions to the time stepwise increase or decrease, step immediately before the transition the A between certain threshold, when increasing the rotation speed of the blower fan, the rotational speed of the blower fan set in the remote control Between the thresholds of the indoor heat exchanger for determining the step immediately after shifting from the rotational speed of the blower fan set by the remote controller when the rotational speed of the blower fan decreases. It is characterized by this.
これによって、従来に比べて早く送風ファンの回転数が高い回転数となると共に、再度送風ファンの回転数が低下すること防止し、絶対的な暖房能力不足を改善でき、同時に部屋全体の温度上昇を従来に比べて改善し、暖房時の立ち上がり性能を向上させることができるため、より快適な室内環境を提供することが可能となるものである。 As a result, the rotational speed of the blower fan is increased faster than before, and the rotational speed of the blower fan is prevented from decreasing again, and the absolute shortage of heating capacity can be improved. Can be improved compared to the prior art, and the startup performance during heating can be improved, so that a more comfortable indoor environment can be provided.
本発明の空気調和機は、雪の日など外気温が低い場合にも、絶対的な暖房能力不足を改善でき、同時に部屋全体の温度上昇を従来に比べて改善し、暖房時の立ち上がり性能を向上させることができるため、より快適な室内環境を提供できる。 The air conditioner of the present invention can improve the absolute shortage of heating capacity even when the outside air temperature is low, such as on a snowy day, and at the same time, the temperature rise of the entire room is improved compared to the conventional one, and the startup performance during heating is improved. Therefore, a more comfortable indoor environment can be provided.
第1の発明は、室内熱交換器と、送風ファンと、空気吹出口に取り付けられた吹出し空気の風向きを変化させる風向変更手段と、前記室内熱交換器の温度を検出する室内熱交換器温度検出手段と、外気温を検出する外気温検出手段とを有する室内機を備えた空気調和機であって、室内熱交換器温度に基づいて前記送風ファンの回転数がステップ状に変更されるとともに、外気温が所定値以下の時は、各ステップを決定する室内熱交換器温度の閾値間に前記室内熱交換器の温度がある場合は前記送風ファンの回転数を一定として、前記室内熱交換器の温度が閾値を越えた場合は前記送風ファンの回転数を増加または減少させ、前記室内熱交換器の温度がある特定の閾値間にある場合は前記送風ファンの回転数を時間に応じて段階的に増加または減少させ、前記ある特定の閾値間とは、前記送風ファンの回転数が増加時は、リモコンで設定した送風ファンの回転数に移行する直前のステップを決定する室内熱交換器の閾値間とし、前記送風ファンの回転数が減少時は、リモコンで設定した送風ファンの回転数から移行した直後のステップを決定する室内熱交換器の閾値間であることを特徴とするものである。 1st invention is an indoor heat exchanger which detects the temperature of the indoor heat exchanger, the ventilation fan, the wind direction change means which changes the wind direction of the blowing air attached to the air blower outlet, and the temperature of the said indoor heat exchanger An air conditioner including an indoor unit having a detection means and an outside air temperature detection means for detecting an outside air temperature, wherein the rotational speed of the blower fan is changed in a step shape based on an indoor heat exchanger temperature. When the outside air temperature is below a predetermined value, if the temperature of the indoor heat exchanger is between the thresholds of the indoor heat exchanger temperature that determines each step, the number of rotations of the blower fan is constant and the indoor heat exchange is performed When the temperature of the cooler exceeds a threshold value, the rotational speed of the blower fan is increased or decreased. When the temperature of the indoor heat exchanger is between a certain threshold value, the rotational speed of the blower fan is set according to time. Incrementally or Small Toe, wherein A between certain threshold, when increasing the rotation speed of the blowing fan, and between the thresholds of the indoor heat exchanger to determine the step of immediately before entering the rotational speed of the blower fan set in the remote control, wherein when the rotation speed of the blower fan is reduced, Ru der those which is a between the threshold of the indoor heat exchanger to determine the steps immediately after transition from the rotational speed of the blower fan set in the remote control.
第2の発明は、特に、第1の発明において、リモコンによる運転開始時にのみ実施することを特徴とするものである。 The second invention is characterized in that, in particular, in the first invention , it is implemented only at the start of operation by the remote controller.
第3の発明は、特に、第1の発明において、リモコンの設定温度と室内機の吸い込み温度の差が所定値以上の場合のみ実施することを特徴とするものである。 The third invention is characterized in that, in particular, in the first invention , the third invention is implemented only when the difference between the set temperature of the remote controller and the suction temperature of the indoor unit is a predetermined value or more.
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
(実施の形態1)
図1は、本発明の第1の実施の形態における空気調和機の冷凍サイクル図を示すものである。
(Embodiment 1)
FIG. 1 shows a refrigeration cycle diagram of an air conditioner according to a first embodiment of the present invention.
図1において、冷房運転時、冷媒は、圧縮機1を吐出された後、四方弁2を通過した後、室外熱交換器3で凝縮し、膨張弁4で減圧され、室内熱交換器5で蒸発し、再び四方弁2を通過して圧縮機1に戻る構成となっている。
In FIG. 1, during the cooling operation, after the refrigerant is discharged from the
一方、暖房運転時、冷媒は、圧縮機1を吐出された後、四方弁2を通過て、室内熱交換器5で凝縮し、膨張弁4で減圧され、室外熱交換器3で蒸発し、再び四方弁2を通過して圧縮機1に戻る。
On the other hand, during the heating operation, the refrigerant is discharged from the
図3は、従来の空気調和機の暖房運転時の室内熱交換器温度と室内機の送風ファンの回転数との相関を示す図である。 FIG. 3 is a diagram showing the correlation between the indoor heat exchanger temperature during the heating operation of the conventional air conditioner and the rotational speed of the blower fan of the indoor unit.
図3において、室内熱交換器温度に基づき、室内送風ファン回転数はステップ状に変更される。この時、各ステップを決定する室内熱交換器温度の閾値と送風ファンの回転数は、体感的に寒さを感じない吹出温度となるように設定され、かつ、最終的にリモコンで設定された送風ファンの回転数となった場合に違和感が無い様、リモコンで選択できる最低の送風ファンの回転数が直前の設定1回転数となっている。 In FIG. 3, based on the indoor heat exchanger temperature, the rotational speed of the indoor fan is changed in steps. At this time, the threshold value of the indoor heat exchanger temperature that determines each step and the rotation speed of the blower fan are set so as to be a blowout temperature that does not feel cold cold, and is finally set by the remote controller. The lowest rotation speed of the blower fan that can be selected by the remote controller is the previous set rotation speed so that there is no sense of incongruity when the rotation speed of the fan is reached.
外気温が10℃以下の様な低い状態での立ち上がり時において、部屋を急速に暖めたいがゆえにリモコンで最大の回転数を設定された場合は、室内熱交換器温度が上昇し、39℃を超えた場合、設定1の最低回転数から、最大回転数に移行することとなり、結果、その風量差により、急激な室内熱交換器温度の低下を招き、再度、送風ファンの回転数が低下し、部屋が暖まらない可能性があった。
When the maximum number of rotations is set with the remote control because it is desired to warm the room rapidly at the start-up when the outside air temperature is 10 ° C or less, the indoor heat exchanger temperature rises to 39 ° C. If exceeded, the minimum rotational speed of
図2は、本発明の第1の実施の形態における空気調和機の暖房運転時の室内熱交換器温度と室内機の送風ファン回転数のステップとの相関を示す図である。 FIG. 2 is a diagram illustrating a correlation between the indoor heat exchanger temperature during the heating operation of the air conditioner and the step of the fan rotation speed of the indoor unit according to the first embodiment of the present invention.
図2において、外気温度が10℃以下の場合には、室内熱交換器の温度が37℃〜39℃の間にA領域を設け、この領域の設定は20rpm/min分だけ送風ファンの回転数を増加させ、MAX:設定回転数とする。このA領域を設けることで、前記のような場合においても急激な室内風量変化が回避可能で、確実に最大回転数を維持させることができ、暖房運転における立ち上がり性能を向上させることができる。 In FIG. 2, when the outside air temperature is 10 ° C. or lower, an A region is provided between the indoor heat exchanger temperature of 37 ° C. and 39 ° C., and the setting of this region is the number of rotations of the blower fan by 20 rpm / min. Is increased to MAX: set rotational speed. By providing this A region, a sudden change in the indoor air volume can be avoided even in the above case, the maximum number of rotations can be reliably maintained, and the start-up performance in the heating operation can be improved.
また、外気温度が10℃以下の場合には、室内熱交換器の温度が36℃〜33℃の間にB領域を設け、この領域の設定は10rpm/min分だけ送風ファンの回転数を減少させ、MIN:設定1とする。 In addition, when the outside air temperature is 10 ° C. or lower, a B region is provided between the temperature of the indoor heat exchanger of 36 ° C. to 33 ° C. The setting of this region reduces the rotational speed of the blower fan by 10 rpm / min. MIN: setting 1.
このことで、外気温度が低いために着霜が成長し、能力不足による室内熱交換器温度の
低下が発生した場合においても、送風ファンの急激な低下が防止でき、暖房運転における立ち上がり性能を向上させることができる。
As a result, frost grows because the outside air temperature is low, and even if the indoor heat exchanger temperature decreases due to insufficient capacity, it can prevent the fan fan from rapidly decreasing and improve startup performance in heating operation Can be made.
また、暖房運転時で、外気温10℃以下において設定した条件は、リモコンによる運転開始時のみ実施することにより、室温が設定温度近辺で安定し、サーモON/OFF(運転/停止)を繰り返している状態では、送風機の回転数を即時リモコン設定回転数とすることができ、室温の安定性の向上が図れる。 In addition, the conditions set at the outside temperature of 10 ° C or less during heating operation are performed only at the start of operation by the remote controller, so that the room temperature is stabilized near the set temperature and the thermo ON / OFF (run / stop) is repeated. In this state, the rotation speed of the blower can be set to the immediate remote control setting rotation speed, and the room temperature stability can be improved.
また、暖房運転時で、外気温10℃以下において設定した条件は、リモコンの設定温度と室内機の吸い込み温度の差が所定値以上のみ実施することとすることにより、室温が低い状態からの立ち上がり時に、冷風感を与えることを防止することが可能となる。 In addition, the condition set at the outside air temperature of 10 ° C or less during heating operation is that the difference between the set temperature of the remote controller and the suction temperature of the indoor unit is performed only at a predetermined value or more, so that the room temperature rises from a low state. Sometimes it is possible to prevent the feeling of cold wind.
尚、本実施の形態において、外気温閾値と室内熱交換器温度閾値によって制御する方法を説明したが、室内熱交換器温度を推定できる圧力や、吹出し空気温度そのものをパラメータとしても構わない。 In the present embodiment, the method of controlling by the outside air temperature threshold and the indoor heat exchanger temperature threshold has been described. However, the pressure at which the indoor heat exchanger temperature can be estimated, or the blown air temperature itself may be used as a parameter.
以上のように、本発明にかかる空気調和機は、暖房運転時、外気温度が低い場合でも外気温に応じて送風ファン回転数を制御することで暖房時の立ち上がり性能を向上できるので、ヒートポンプ給湯器等の用途にも適用できる。 As described above, the air conditioner according to the present invention can improve the start-up performance during heating by controlling the rotational speed of the blower fan according to the outside air temperature even when the outside air temperature is low during the heating operation. It can also be used for purposes such as vessels.
1 圧縮機
2 四方弁
3 室外側熱交換器
4 膨張弁
5 室内側熱交換器
1 Compressor 2 Four-
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CN108195038A (en) * | 2017-11-29 | 2018-06-22 | 珠海格力电器股份有限公司 | A kind of air conditioning exhausting control method, device, storage medium and air-conditioning |
CN110243049A (en) * | 2019-06-20 | 2019-09-17 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioning heating control method, device and air conditioner |
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JP5507231B2 (en) * | 2009-12-16 | 2014-05-28 | 三洋電機株式会社 | Air conditioner |
CN103029715B (en) * | 2012-12-31 | 2015-07-15 | 石家庄国祥运输设备有限公司 | Indoor temperature control method of subway vehicle |
JP6789399B2 (en) * | 2017-08-24 | 2020-11-25 | 三菱電機株式会社 | Air conditioner |
JP6493486B1 (en) * | 2017-10-30 | 2019-04-03 | ダイキン工業株式会社 | Air conditioner |
CN110715421B (en) * | 2019-10-08 | 2021-06-18 | 广东美的制冷设备有限公司 | Air conditioner and control method and device thereof |
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JP2878806B2 (en) * | 1990-08-28 | 1999-04-05 | 株式会社東芝 | Air conditioner |
JPH07332740A (en) * | 1994-06-03 | 1995-12-22 | Toshiba Corp | Operation control method of air conditioner |
JPH10267372A (en) * | 1997-03-26 | 1998-10-09 | Fujitsu General Ltd | Controlling method for air conditioner |
JPH11264599A (en) * | 1998-03-18 | 1999-09-28 | Fujitsu General Ltd | Method for controlling air conditioner |
JP3599011B2 (en) * | 2000-09-29 | 2004-12-08 | ダイキン工業株式会社 | Air conditioner |
JP4231247B2 (en) * | 2002-06-25 | 2009-02-25 | シャープ株式会社 | Air conditioner |
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CN108195038A (en) * | 2017-11-29 | 2018-06-22 | 珠海格力电器股份有限公司 | A kind of air conditioning exhausting control method, device, storage medium and air-conditioning |
CN110243049A (en) * | 2019-06-20 | 2019-09-17 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioning heating control method, device and air conditioner |
CN110243049B (en) * | 2019-06-20 | 2021-07-16 | 宁波奥克斯电气股份有限公司 | Air conditioner heating control method and device and air conditioner |
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