JP4788375B2 - Air conditioner - Google Patents
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- JP4788375B2 JP4788375B2 JP2006033389A JP2006033389A JP4788375B2 JP 4788375 B2 JP4788375 B2 JP 4788375B2 JP 2006033389 A JP2006033389 A JP 2006033389A JP 2006033389 A JP2006033389 A JP 2006033389A JP 4788375 B2 JP4788375 B2 JP 4788375B2
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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の制御手段を有する空気調和機に関するものである。 The present invention relates to an air conditioner having control means for improving 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し空気温度を上げて、吹出し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 condensing temperature to raise the blown air temperature, and performing air volume control based on the blown air temperature and the radiation temperature (see, for example, Patent Document 2).
図８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８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. 8 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９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９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くて湿度が高い場合には、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 outside air temperature is low and the humidity is high, 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. Thus, the indoor heat exchanger temperature may begin to decrease without increasing to the temperature range where the rotational 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.
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、送風ファン回転数変更手段の閾値を所定値より低く設定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-described 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 below a predetermined value, the blower fan rotation speed changing means It is an object of the present invention to provide an air conditioner characterized in that the threshold value is set lower than a predetermined 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、室内機に、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を備えた空気調和機であって、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、室内熱交換器温度検出手段により検出された室内熱交換器温度が上昇するに従って送風ファンの回転数を閾値毎にステップ状に上昇させる送風ファン回転数変更手段と、外気温を検出する外気温検出手段と、圧縮機とを有し、風向手段は、空気吹出口に上下方向に回動可能に軸支され、風向きを垂直方向に変化させる風向上下羽根と、空気吹出口近傍に左右方向に回動可能に軸支され、風向きを水平方向に変化させる複数の風向左右羽根で構成され、暖房運転の立ち上がり時の圧縮機の運転開始から所定時間内において、外気温度が所定値を超える場合は、予め設定された閾値に基づいて送風ファンの回転数を上昇させるとともに、外気温度が所定値以下の場合は、送風ファンの回転数をステップ状に上昇させる閾値を、予め設定された閾値より低く設定して送風ファンの回転数を上昇させ、風向上下羽根または風向左右羽根の開度を外気温度が所定値を超える場合の開度よりも風量を減少させるように設定することを特徴とするものである。 In order to solve the above-described conventional problems, an air conditioner of the present invention includes an indoor unit, an indoor heat exchanger, a blower fan, and a wind direction changing unit that changes a wind direction of blown air attached to the air outlet. An air conditioner provided with an indoor heat exchanger temperature detecting means for detecting the temperature of the indoor heat exchanger, and an air blower fan as the indoor heat exchanger temperature detected by the indoor heat exchanger temperature detecting means increases. It has a blower fan rotational speed changing means for increasing the rotational speed stepwise for each threshold value, an external air temperature detecting means for detecting the external air temperature, and a compressor, and the wind direction means is rotated vertically to the air outlet. A wind-enhancing lower blade that is pivotally supported and changes the wind direction in the vertical direction, and a plurality of wind direction left and right blades that are pivotally supported in the left-right direction near the air outlet and change the wind direction horizontally, Start of heating operation Within a predetermined time after starting the operation of the compressor when Ri, if the outside air temperature exceeds a predetermined value, with increases the rotational speed of the blower fan based on a preset threshold, when the outside air temperature is less than a predetermined value Sets the threshold for increasing the rotation speed of the blower fan in a stepwise manner to be lower than a preset threshold value, thereby increasing the rotation speed of the blower fan, and the opening temperature of the wind improving lower blade or the wind direction left and right blades is determined by the outside air temperature The air volume is set to be smaller than the opening when the value is exceeded .
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ために、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空気調和機を提供することが可能となるものである。 As a result, since the rotation speed of the blower fan is higher than the conventional speed, the shortage of the absolute heating capacity can be improved. It is possible to provide an air conditioner that improves performance.
本発明の空気調和機は、雪の日など外気温が低くて湿度が高い場合にも、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 and the humidity is high, 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, Since the start-up performance can be improved, a more comfortable indoor environment can be provided.
第１の発明は、室内機に、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を備えた空気調和機であって、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、室内熱交換器温度検出手段により検出された室内熱交換器温度が上昇するに従って送風ファンの回転数を閾値毎にステップ状に上昇させる送風ファン回転数変更手段と、外気温を検出する外気温検出手段と、圧縮機とを有し、風向手段は、空気吹出口に上下方向に回動可能に軸支され、風向きを垂直方向に変化させる風向上下羽根と、空気吹出口近傍に左右方向に回動可能に軸支され、風向きを水平方向に変化させる複数の風向左右羽根で構成され、暖房運転の立ち上がり時の圧縮機の運転開始から所定時間内において、外気温度が所定値を超える場合は、予め設定された閾値に基づいて送風ファンの回転数を上昇させるとともに、外気温度が所定値以下の場合は、送風ファンの回転数をステップ状に上昇させる閾値を、予め設定された閾値より低く設定して送風ファンの回転数を上昇させ、風向上下羽根または風向左右羽根の開度を外気温度が所定値を超える場合の開度よりも風量を減少させるように設定することにより、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ために、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空気調和機を提供することができ、風量を下げることで凝縮温度を上げて送風ファンの上のステップへと移行することが可能となり、結果として暖房能力が向上し、暖房運転時の立ち上がり性能を良くすることができ、圧縮機の運転開始から所定時間以内のみ実施することにより、室温安定状態での除霜運転終了からの立ち上がり時や室温安定状態による圧縮機の停止からの立ち上がり時に、冷風感を与えることを防止できる。 1st invention is an air conditioner provided with the indoor direction heat exchanger, the ventilation fan, and the wind direction change means which changes the wind direction of the blowing air attached to the air blower outlet in the indoor unit, Comprising: Indoor heat exchanger temperature detecting means for detecting the temperature of the heat exchanger, and air blowing that increases the rotational speed of the blower fan stepwise for each threshold as the indoor heat exchanger temperature detected by the indoor heat exchanger temperature detecting means rises It has a fan rotation speed changing means, an outside air temperature detecting means for detecting the outside air temperature, and a compressor, and the wind direction means is pivotally supported by the air outlet so as to be able to rotate in the vertical direction, and changes the wind direction in the vertical direction. It is composed of a wind improving lower blade and a plurality of wind direction left and right blades that are pivotally supported in the vicinity of the air outlet and turn in the left and right direction, and change the wind direction horizontally, from the start of compressor operation at the start of heating operation Within a given time There are, if the outside air temperature exceeds a predetermined value, increases with increases the rotational speed of the blower fan based on a preset threshold, if the outside air temperature is below the predetermined value, the rotational speed of the blower fan stepwise Set the threshold value to be lower than the preset threshold value to increase the rotation speed of the blower fan, and reduce the air volume from the opening degree when the outside air temperature exceeds the predetermined value for the opening degree of the wind improving lower blade or the wind direction left and right blades by setting so as to, for the rotational speed of the faster the blower fan than the conventional is higher rotational speed, can improve insufficient absolute heating capacity, it improved compared with the temperature rise of the whole room conventional simultaneously It is possible to provide an air conditioner that improves the startup performance during heating, and by lowering the air volume, it is possible to increase the condensation temperature and move to the step above the blower fan. As a result, the heating capacity can be improved and the startup performance during heating operation can be improved, and by performing it only within a predetermined time from the start of operation of the compressor, It is possible to prevent a feeling of cold air from being given when the compressor starts up from a stable state.
第２の発明は、第１の発明において、外気温度が所定値以下の暖房運転時であって、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、送風ファンの回転数をステップ状に上昇させる閾値を低くすることにより、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。 The second invention is the rotation of the blower fan according to the first invention , when the outside air temperature is not more than a predetermined value during heating operation and the difference between the set temperature of the remote controller and the suction temperature of the indoor unit is not less than the predetermined value. By lowering the threshold value for increasing the number in steps, it is possible to prevent the feeling of cold air from being given when the room temperature rises from a low state.
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を通過した後、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２は、本発明の第１の実施の形態における暖房運転の温度上昇時における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、図３は、暖房運転の温度上昇時における室内熱交換器温度と暖房能力の相関を示す図である。図において、温度の閾値Ａ、Ｂ、Ｃ、Ｄは外気温が所定値を超える場合と、所定値以下の場合によって表１のように設定されている。尚、本実施の形態では所定値を５℃、室内機の送風ファンの回転数は設定回転数に達するまでに、回転数１、回転数２、回転数３とステップ状に変化するように設定している。
FIG. 2 is a diagram showing a correlation between the temperature of the indoor heat exchanger and the rotation speed of the blower fan of the indoor unit when the temperature of the heating operation is increased in the first embodiment of the present invention, and FIG. 3 is the temperature of the heating operation It is a figure which shows the correlation of the indoor heat exchanger temperature at the time of a raise, and heating capability. In the figure, the temperature thresholds A, B, C, and D are set as shown in Table 1 depending on whether the outside air temperature exceeds a predetermined value or not more than a predetermined value. In the present embodiment, the predetermined value is set to 5 ° C., and the rotation speed of the blower fan of the indoor unit is set to change stepwise with
図２において、外気温度が所定値５℃を超える場合、室内機の送風ファンの回転数は、暖房運転時の吹出空気による冷風感が発生しないように、室内熱交換器温度に応じて回転数１、回転数２、回転数３とステップ状に変化するよう設定されている。 In FIG. 2, when the outside air temperature exceeds a predetermined value of 5 ° C., the rotation speed of the blower fan of the indoor unit is determined according to the indoor heat exchanger temperature so that the cool air feeling due to the blown air during the heating operation does not occur. It is set to change in steps of 1, 2, and 3.
一方、外気温度が所定値５℃以下の場合には、室内機の送風ファンの回転数が変化する室内熱交換器温度の閾値が表１で示されるように所定値より低く設定されている。 On the other hand, when the outside air temperature is a predetermined value of 5 ° C. or less, the threshold value of the indoor heat exchanger temperature at which the rotational speed of the blower fan of the indoor unit changes is set lower than the predetermined value as shown in Table 1.
例えば、室内機の送風ファンの回転数が回転数２から回転数３へ変更する室内熱交換器温度の閾値Ｂを３５℃から３３℃に変更することにより、外気温度が所定値５℃を超える時よりも早く、回転数２から回転数３に変更されることとなる。
For example, the outdoor air temperature exceeds a predetermined value of 5 ° C. by changing the threshold B of the indoor heat exchanger temperature at which the rotation speed of the blower fan of the indoor unit is changed from the rotation speed 2 to the
従って、図３のように、暖房運転開始時の絶対的な能力不足を送風ファンの回転数を早く上げることにより少しでも補うことが可能となり、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。 Therefore, as shown in FIG. 3, it is possible to compensate for the absolute shortage of capacity at the start of the heating operation by increasing the rotational speed of the blower fan as soon as possible, and the start-up performance in the heating operation can be improved.
次に、図４は、本発明の第１の実施の形態における風向上下羽根と室内機の空気吹出口近傍の斜視図、図５は、同一回転数での上下羽根角度と風量の相関を示す図である。 Next, FIG. 4 is a perspective view of the wind improving lower blade and the vicinity of the air outlet of the indoor unit in the first embodiment of the present invention, and FIG. 5 shows the correlation between the upper and lower blade angles and the air volume at the same rotational speed. FIG.
図４において、外気温が所定値５℃以下の場合に風向上下羽根の開度を、外気温が５℃を超える場合の開度よりも小さくすることにより、図５のように風量は減少する。従って、外気温が低くて湿度が高い雪の日などのように、送風ファンの回転数が回転数３から設定回転数に上昇せずに暖房運転を継続してしまうような場合にも、風向羽根の開度を小さくして風量を下げることにより凝縮温度を上げて室内熱交換器温度を上昇させることで、送風ファン回転数を上のステップ値へと移行することが可能となり、結果として暖房能力が向上し、暖房運転時の立ち上がり性能を良くすることが可能となる。
In FIG. 4, when the outside air temperature is a predetermined value of 5 ° C. or less, the air flow is reduced as shown in FIG. 5 by making the opening of the wind improving lower blade smaller than the opening when the outside air temperature exceeds 5 ° C. . Therefore, even in the case where the rotation speed of the blower fan does not increase from the
また、暖房運転時の羽根の下限開度位置よりももっと下向きに設定すれば、従来よりも低い温度の空気が人に当たる可能性が少なくなり、冷風感を与えることなく凝縮温度も上昇させることができ、速暖性を向上させることが可能となる。 In addition, if it is set to be more downward than the lower limit opening position of the blade during heating operation, the possibility that air with a lower temperature than hitting the person will hit the person is reduced, and the condensation temperature can be raised without giving a feeling of cold wind And quick warming can be improved.
次に、図６は、本発明の第１の実施の形態における風向左右羽根と室内機の空気吹出口近傍の平面図、図７は、同一回転数での上下羽根位置と左右羽根位置による風量の相関を示す図である。 Next, FIG. 6 is a plan view of the airflow direction left and right blades and the vicinity of the air outlet of the indoor unit according to the first embodiment of the present invention, and FIG. 7 is the airflow amount by the upper and lower blade positions and the left and right blade positions at the same rotational speed. It is a figure which shows correlation of these.
図６において、外気温が所定値５℃以下の場合に風向左右羽根の開度を、外気温が５℃を超える場合の開度よりも小さくすることにより、図７のように風量は減少する。従って、外気温が低くて湿度が高い雪の日などのように、送風ファンの回転数が回転数３から設定回転数に上昇せずに暖房運転を継続してしまうような場合にも、風向羽根の開度を小さくして風量を下げることにより凝縮温度を上げて室内熱交換器温度を上昇させることで、送風ファン回転数を上のステップ値へと移行することが可能となり、結果として暖房能力が向上し、暖房運転時の立ち上がり性能を良くすることが可能となる。
In FIG. 6, when the outside air temperature is a predetermined value of 5 ° C. or less, the airflow is reduced as shown in FIG. 7 by making the opening of the right and left blades smaller than the opening when the outside air temperature exceeds 5 ° C. . Therefore, even in the case where the rotation speed of the blower fan does not increase from the
また、複数の風向左右羽根位置を中央寄りから外向きにして開度を小さくすることにより、従来よりも低い温度の空気が人に当たる可能性が少なくなり、冷風感を与えることなく凝縮温度も上昇させることができ、速暖性を向上させることが可能となる。 In addition, by reducing the opening by setting the left and right blade positions of multiple wind directions outward from the center, the possibility of air hitting people at a lower temperature is reduced, and the condensation temperature rises without giving a cool wind feeling It is possible to improve the quick warming property.
更に、外気温が所定値５℃以下において、閾値Ｂを３５℃から３３℃に変更し、風向上下羽根角度を所定角度よりも小さく変更した状態で暖房運転を継続し、室内熱交換器温度が閾値Ｂの初期値である３５℃を所定時間の２０分継続した場合には、風向上下羽根の開度を所定角度に戻すことを行う。これにより、冷風感を与えることなく部屋の下部に風を届けることが可能となり、部屋全体の温度上昇も早めることが可能となる。 Further, when the outside air temperature is a predetermined value of 5 ° C. or less, the threshold value B is changed from 35 ° C. to 33 ° C., the heating operation is continued in a state where the wind improving lower blade angle is changed to be smaller than the predetermined angle, and the indoor heat exchanger temperature is When the initial value of the threshold value B of 35 ° C. is continued for a predetermined time of 20 minutes, the opening degree of the wind improving lower blade is returned to a predetermined angle. As a result, it is possible to deliver the wind to the lower part of the room without giving a feeling of cold wind, and it is possible to accelerate the temperature rise of the entire room.
更に、外気温が所定値５℃以下において、閾値Ｂを３５℃から３３℃に変更し、複数の風向左右羽根角度を所定角度よりも小さく変更した状態で暖房運転を継続し、室内熱交換器温度が閾値Ｂの初期値である３５℃を所定時間の２０分継続した場合には、複数の風向左右羽根の開度を所定角度に戻すことを行う。これにより、冷風感を与えることなく部屋の下部に風を届けることが可能となり、部屋全体の温度上昇も早めることが可能となる。 Furthermore, when the outside air temperature is a predetermined value of 5 ° C. or less, the threshold value B is changed from 35 ° C. to 33 ° C., and the heating operation is continued in a state where the plurality of wind direction left and right blade angles are changed to be smaller than the predetermined angle. When the temperature of 35 ° C., which is the initial value of the threshold value B, is continued for a predetermined time of 20 minutes, the opening degree of the plurality of wind direction left and right blades is returned to a predetermined angle. As a result, it is possible to deliver the wind to the lower part of the room without giving a feeling of cold wind, and it is possible to accelerate the temperature rise of the entire room.
更に、暖房運転時で、外気温が所定値５℃以下において設定した条件は、圧縮機の運転開始から所定時間以内のみ実施することとすることにより、室温安定状態での除霜運転終了からの立ち上がり時や室温安定状態による圧縮機の停止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。 Furthermore, the conditions set when the outside air temperature is a predetermined value of 5 ° C. or less during the heating operation are performed only within a predetermined time from the start of operation of the compressor. It is possible to prevent a feeling of cold air from being given at the time of start-up or at the time of start-up after the compressor is stopped due to a room temperature stable state.
更に、暖房運転時で、外気温が所定値５℃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場合のみ実施することにより、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。
Furthermore, the conditions set when the outside air temperature is a predetermined value of 5 ° C. or less during heating operation are performed 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, so that the room temperature is low. It is possible to prevent the feeling of cold wind from being given at the time of rising.
なお、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 addition, in this Embodiment, although the method controlled by an outside air temperature threshold value and an indoor heat exchanger temperature threshold value was demonstrated, you may use the pressure which can estimate an indoor heat exchanger temperature, or the blowing air temperature itself 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 startup performance during heating by controlling the rotation speed of the blower fan even when the outside air temperature is low during heating operation. Is also applicable.
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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