JP6401585B2 - Air conditioner - Google Patents

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JP6401585B2
JP6401585B2 JP2014237542A JP2014237542A JP6401585B2 JP 6401585 B2 JP6401585 B2 JP 6401585B2 JP 2014237542 A JP2014237542 A JP 2014237542A JP 2014237542 A JP2014237542 A JP 2014237542A JP 6401585 B2 JP6401585 B2 JP 6401585B2
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heat exchanger
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room temperature
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哲平 武藤
哲平 武藤
彰 吉仕
彰 吉仕
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Corona Corp
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Description

この発明は、暖房運転停止時の運転制御機能を備えた空気調和機に関するものである。   The present invention relates to an air conditioner having an operation control function when heating operation is stopped.

従来から、従来、ヒートポンプ式空気調和機は、暖房運転に際し、例えば外気温度が低くい程、暖房の立上り特性が劣り、暖房運転の開始から室内に温風を吹き出すまで時間がかかっていた。そこで、暖房運転の停止後、例えば３時間継続して運転が行われず、かつ、外気温度が３℃以下になっているときには、圧縮機に高周波数の低電圧を印加し、その圧縮機に微弱電流（約30Wの消費電力）を流し、圧縮機を暖めるようにしている（予熱機能）。すなわち、その予熱機能により、空気調和機の暖房運転開始に際し、暖房の立上り特性が向上し、比較的短時間に温風を吹き出すことができ、室内を速やかに快適環境とすることができるようになっている。
また長期間外出等で暖房運転を行わない場合には自動的に予熱機能を停止して、無駄な電力消費を少なくし、経済性を向上した空気調和機があった。（例えば、特許文献１参照） Conventionally, a heat pump type air conditioner has conventionally suffered from poor heating start-up characteristics as the outside air temperature is lower, for example, during the heating operation, and it took time from the start of the heating operation to blowing out warm air into the room. Therefore, after the heating operation is stopped, for example, when the operation is not performed continuously for 3 hours and the outside air temperature is 3 ° C. or lower, a high-frequency low voltage is applied to the compressor, and the compressor is weak. Current (approx. 30W power consumption) is applied to warm the compressor (preheating function). That is, the preheating function improves the start-up characteristics of the heating when starting the heating operation of the air conditioner, can blow out warm air in a relatively short time, and can quickly make the room a comfortable environment. It has become.
In addition, when the heating operation is not performed due to going out for a long time, there is an air conditioner that automatically stops the preheating function to reduce wasteful power consumption and improve economy. (For example, see Patent Document 1)

特公平７−５６４０４号公報Japanese Patent Publication No. 7-56404

この従来例の空気調和機は、予熱運転を行うことによって暖房運転の立上り特性が向上し素早く暖房運転を開始することができるものであるが、寒冷地では秋の終わりと春先の比較的暖房負荷の小さい時期のみ空気調和機を使用し、冬期は運転コスト等の関係で石油ファンヒーターやガスストーブ等の暖房専用機によって暖房を行うことが一般的に行われている。
この場合、壁面の比較的上部に取り付けられている空気調和機の室内機は停止している。そして、室内機内部に備えた室内熱交換器は冷媒配管によって屋外に設置され冷え切った室外機と接続されているために、冷媒配管を通じた熱伝導で室内熱交換器は極めて低温になるため、室内機全体または吹出口の隙間から冷気が下降することで、室内の温度に比較して室内機の下方のみが寒く感じる問題があった。 This conventional air conditioner improves the start-up characteristics of the heating operation by performing the preheating operation and can start the heating operation quickly, but in a cold region, it is relatively heated at the end of autumn and early spring. In general, the air conditioner is used only during a small period of time, and in winter, heating is performed by a dedicated heating machine such as an oil fan heater or a gas stove because of operating costs.
In this case, the indoor unit of the air conditioner attached to the relatively upper part of the wall surface is stopped. And since the indoor heat exchanger provided in the interior of the indoor unit is connected to an outdoor unit that is installed outside by the refrigerant pipe and cooled down, the indoor heat exchanger becomes extremely low temperature due to heat conduction through the refrigerant pipe. Since the cool air descends from the entire indoor unit or the gap between the blowout ports, there is a problem that only the lower part of the indoor unit feels colder than the indoor temperature.

この発明はこの点に着目し上記欠点を解決する為、特にその構成を、室内機上面または前面に吸込口を、底面に吹出口を、内部には室内熱交換器と室内ファンを備え、前記吸込口と室内熱交換器と室内ファンと吹出口とを連通して送風経路を形成し、室外機には圧縮機と四方弁と室外熱交換器と膨張弁と室外ファンを備え、前記圧縮機と四方弁と室内熱交換器と膨張弁と室外熱交換器とを冷媒配管で順次接続して冷凍回路を形成し、この冷凍回路と室内ファンと室外ファンを制御部で制御し、室内の温度調節を行う空気調和機に於いて、前記吹出口には運転時に上下の送風方向を調整すると共に、停止時には自動で吹出口を閉じる水平羽根を設け、前記室内熱交換器の温度を検知する室内熱交センサと、室温を検知する室温センサとを設け、運転停止時に前記室内熱交換器の温度が第１の所定温度未満を第１の所定時間継続した時に、前記室内ファンを低回転で運転すると共に室温センサの読込を断続的に行い、前記室温センサの値が第２の所定時間以内で第２の所定温度以上上昇した時には、前記水平羽根にて吹出口を閉じたまま、圧縮機を低回転で暖房運転を開始し、室内熱交温度が室温以上に上昇したときに運転停止状態に戻るコールドドラフト防止機能を備えたものである。 This invention pays attention to this point, and in order to solve the above-mentioned drawbacks, in particular, the configuration is provided with a suction port on the upper surface or front surface of the indoor unit, a blower outlet on the bottom surface, an indoor heat exchanger and an indoor fan inside, A suction passage, an indoor heat exchanger, an indoor fan, and an air outlet are communicated to form a ventilation path, and the outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an outdoor fan, and the compressor And a four-way valve, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger are sequentially connected by a refrigerant pipe to form a refrigeration circuit, and the refrigeration circuit, the indoor fan, and the outdoor fan are controlled by a control unit to control the indoor temperature In the air conditioner that performs adjustment, the air outlet is provided with a horizontal blade that adjusts the upper and lower air blowing directions during operation and automatically closes the air outlet when stopped, and detects the temperature of the indoor heat exchanger. A heat exchange sensor and a room temperature sensor for detecting the room temperature are provided. When the temperature of rolling the indoor heat exchanger when stopping is less than a first predetermined temperature is continued first predetermined time, intermittently perform reading of temperature sensor as well as operating the indoor fan at a low rotation speed, the room temperature sensor When the value rises above the second predetermined temperature within the second predetermined time, the heating operation is started at a low rotation of the compressor while the outlet is closed by the horizontal blade, and the indoor heat exchange temperature is room temperature. It is equipped with a cold draft prevention function that returns to the operation stop state when it rises above.

この発明によれば、コールドドラフト防止機能を設けることによって、冬期間空気調和機を使用しないで石油ファンヒーターやガスストーブ等の暖房専用機のみによって暖房を行った場合でも、室外機から室内機を通じて冷気が発生し、部屋上部に設置される室内機１から冷気が下降して室内機の下方が寒く感じることを防止することができるものである。
また、コールドドラフト防止機能をリモコンにて選択可能にしたことで、家具などの配置の関係で室内機の下方には人があまり近づかないような場合にはコールドドラフト防止機能を停止することを可能となる。 According to the present invention, by providing a cold draft prevention function, even when heating is performed only by a dedicated heating machine such as an oil fan heater or a gas stove without using an air conditioner during the winter period, the outdoor unit passes through the indoor unit. It is possible to prevent cold air from being generated and the cold air descending from the indoor unit 1 installed at the upper part of the room and feeling the cold below the indoor unit.
In addition, the cold draft prevention function can be selected with the remote control, so that it is possible to stop the cold draft prevention function when people are not very close to the indoor unit due to the arrangement of furniture, etc. It becomes.

この発明一実施例の設置状態の説明図。Explanatory drawing of the installation state of one Example of this invention. この発明一実施例の概略説明図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 同要部のフローチャート図。The flowchart figure of the principal part.

次に、この発明に係る空気調和機を図面に示された一実施例で説明する。
１は空気調和機の室内機で、室内壁面の比較的上部に取り付けられ暖房運転では室内の下方に向けて温風を吹出し、冷房運転では水平方向に冷風を吹き出して室温を設定温度に調整する。前記室内機１の上面または前面には横長状の開口部である吸込口２が設けられ、室内機１の底面には横長状の開口部である吹出口３が設けられている。 Next, an air conditioner according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes an indoor unit of an air conditioner, which is attached to a relatively upper part of an indoor wall surface and blows out hot air toward the lower part of the room in heating operation, and blows out cold air in the horizontal direction in cooling operation to adjust the room temperature to the set temperature. . A suction port 2 that is a horizontally long opening is provided on the top surface or the front surface of the indoor unit 1, and a blower outlet 3 that is a horizontally long opening is provided on the bottom surface of the indoor unit 1.

前記室内機１の内部には多数のアルミニューム片に銅管を貫通して形成されるフィンチューブ式の室内熱交換器４と、クロスローファンの室内ファン５を備え、前記吸込口２と室内熱交換器４と室内ファン５と吹出口３とを連通して送風経路６を形成している。   The indoor unit 1 includes a fin tube type indoor heat exchanger 4 formed by penetrating a copper tube through a number of aluminum pieces, and an indoor fan 5 of a cross low fan, and the intake port 2 and the indoor unit The heat exchanger 4, the indoor fan 5, and the blower outlet 3 are connected, and the ventilation path 6 is formed.

７は前記室内機１側に配置されたリモコンで、空気調和機の運転および停止スイッチや冷房運転・暖房運転・除湿運転等の運転コースを変更するコース選択スイッチ、冷房・暖房温度の室温設定スイッチ、および空気調和機の暖房運転停止後のコールドドラフト防止機能の選択をする選択スイッチ等のスイッチ類８と、温度や時間を液晶パネル等で表示する表示部９を設けている。   7 is a remote controller arranged on the indoor unit 1 side, an air conditioner operation / stop switch, a course selection switch for changing an operation course such as cooling operation / heating operation / dehumidification operation, and room temperature setting switch for cooling / heating temperature And a switch 8 such as a selection switch for selecting a cold draft prevention function after the heating operation of the air conditioner is stopped, and a display unit 9 for displaying temperature and time on a liquid crystal panel or the like.

１０は前記吸込口２と室内熱交換器４の間の送風経路６に備えた室温センサで、吸込口２より吸い込まれた空気の温度を検知する。１１は室内熱交センサで、前記室内熱交換器４の表面や近接する冷媒配管に取り付けられ室内熱交換器４の温度を検知する。１２は室内制御部で、前記リモコン７で設定された暖房温度や運転信号が入ると、室温センサ１１から送られてくる室温を読み込み、運転条件を指令する。   Reference numeral 10 denotes a room temperature sensor provided in the blower path 6 between the suction port 2 and the indoor heat exchanger 4 and detects the temperature of air sucked from the suction port 2. Reference numeral 11 denotes an indoor heat exchange sensor, which is attached to the surface of the indoor heat exchanger 4 or a nearby refrigerant pipe and detects the temperature of the indoor heat exchanger 4. An indoor control unit 12 reads the room temperature sent from the room temperature sensor 11 when a heating temperature or an operation signal set by the remote controller 7 is input, and instructs an operation condition.

１３は前記室内ファン５を回転駆動する室内ファンモータで、インバータ制御により回転数を多段階に変化可能で有り、約３００〜１２００ｒｐｍの範囲で回転する。１４は前記吹出口３に設けた水平羽根で、運転時には上下の送風方向を調整すると共に、停止時には自動で吹出口３を蓋状に閉じるものであり、ルーバーモータ１５によって回動する。   Reference numeral 13 denotes an indoor fan motor that rotationally drives the indoor fan 5, the number of rotations of which can be changed in multiple stages by inverter control, and rotates in a range of about 300 to 1200 rpm. Reference numeral 14 denotes a horizontal blade provided at the air outlet 3, which adjusts the upper and lower air blowing directions during operation and automatically closes the air outlet 3 in a lid shape when stopped, and is rotated by a louver motor 15.

１６は室外機で、内部には圧縮機１７と四方弁１８、室外熱交換器１９、膨張弁２０を備え、前記室内機１の室内熱交換器４とを含めて圧縮機１７、四方弁１８、室内熱交換器４、膨張弁２０、室外熱交換器１９とを冷媒配管２１で順次接続して冷凍回路２２を形成し、この冷凍回路２２内をフロン等の冷媒が循環して室温調整を行うものであり、暖房運転では図１の実線矢印で示すように、圧縮機１７、四方弁１８、室内熱交換器４、膨張弁２０、室外熱交換器１９、四方弁１８の方向で冷媒が循環することで、室内熱交換器４は高温になり室内ファン５で温風を室内に吹き出すことで室内の暖房をするものであり、暖房運転時は室外熱交換器１９は低温になり、室外ファン２３によって外気を室外熱交換器１９に送風することで、外気から熱をくみあげるものである。   Reference numeral 16 denotes an outdoor unit, which includes a compressor 17 and a four-way valve 18, an outdoor heat exchanger 19 and an expansion valve 20, and includes the compressor 17 and the four-way valve 18 including the indoor heat exchanger 4 of the indoor unit 1. The indoor heat exchanger 4, the expansion valve 20, and the outdoor heat exchanger 19 are sequentially connected by a refrigerant pipe 21 to form a refrigeration circuit 22, and a refrigerant such as chlorofluorocarbon circulates in the refrigeration circuit 22 to adjust the room temperature. In the heating operation, as indicated by the solid line arrows in FIG. 1, the refrigerant flows in the direction of the compressor 17, the four-way valve 18, the indoor heat exchanger 4, the expansion valve 20, the outdoor heat exchanger 19, and the four-way valve 18. By circulating, the indoor heat exchanger 4 becomes hot and the indoor fan 5 blows warm air into the room to heat the room indoors. During the heating operation, the outdoor heat exchanger 19 becomes low temperature and the outdoor By blowing the outside air to the outdoor heat exchanger 19 by the fan 23, It is intended for pumping up the heat.

前記圧縮機１７はインバータ制御によって、約３０〜１２０Ｈｚの範囲で多段階に回転制御され、設定室温と現在室温の差等に応じて回転制御、能力制御が行われる。２４は室外制御部で、前記室内制御部１２からの信号や外気温センサ２５の値等から、情報を得ながら圧縮機１７の運転周波数や室外ファン２３の回転数を決定し、運転制御する。   The compressor 17 is rotationally controlled in multiple stages in the range of about 30 to 120 Hz by inverter control, and rotational control and capacity control are performed according to the difference between the set room temperature and the current room temperature. An outdoor control unit 24 determines the operating frequency of the compressor 17 and the rotational speed of the outdoor fan 23 while obtaining information from the signal from the indoor control unit 12, the value of the outside air temperature sensor 25, and the like to control the operation.

２５は前記室内制御部１２に備えたコールドドラフト防止機能を司るコールドドラフト防止部、２６はタイマー部。２７は前記室内機１と室外機１６を接続する連絡配管で、前記冷媒配管２１の一部になる。   Reference numeral 25 denotes a cold draft preventing unit that controls the cold draft preventing function provided in the indoor control unit 12, and 26 denotes a timer unit. Reference numeral 27 is a connecting pipe for connecting the indoor unit 1 and the outdoor unit 16 and becomes a part of the refrigerant pipe 21.

寒冷地では秋の終わりと春先の比較的暖房負荷の小さい時期のみ空気調和機を使用し、冬期は運転コスト等の関係で石油ファンヒーターやガスストーブ等の暖房専用機２８によって暖房を行うことが一般的に行われている。前記暖房専用機２８によって室内の暖房が行われ室温が２５〜２８℃等の快適温度に暖房が行われたとき、壁面の比較的上部に取り付けられている室内機は停止している。そして、室内機１内部に備えた室内熱交換器４は冷媒配管２１（連絡配管２７）によって屋外に設置され冷え切った室外機１６と接続されているために、冷媒配管２１を通じた熱伝導で室内熱交換器４は極めて低温（外気温に応じて変動する）になるため、室内機１全体または吹出口３の隙間から室内熱交換器４の冷気が下降する（コールドドラフトの発生）ことで、室温に比較して室内機１の下方のみが寒く感じる。   In cold regions, air conditioners are used only in the late autumn and early spring when the heating load is relatively small, and in winter, heating is performed by dedicated heating devices 28 such as oil fan heaters and gas stoves because of operating costs. Generally done. When the room heating is performed by the heating unit 28 and the room temperature is heated to a comfortable temperature such as 25 to 28 ° C., the indoor unit attached to the relatively upper part of the wall surface is stopped. And since the indoor heat exchanger 4 provided in the interior of the indoor unit 1 is connected to the outdoor unit 16 which is installed outdoors and cooled down by the refrigerant pipe 21 (connection pipe 27), heat conduction through the refrigerant pipe 21 is achieved. Since the indoor heat exchanger 4 becomes extremely low temperature (varies depending on the outside air temperature), the cold air in the indoor heat exchanger 4 descends from the gap between the entire indoor unit 1 or the outlet 3 (occurrence of a cold draft). Only the lower part of the indoor unit 1 feels colder than the room temperature.

図３のフローチャート図によってコールドドラフト防止機能を説明すれば、ステップ１において空気調和機は停止状態にあり、リモコン７のスイッチ８にてコールドドラフト防止機能を実施することが選択されている状態にある。   If the cold draft prevention function is described with reference to the flowchart of FIG. 3, the air conditioner is in a stopped state in step 1, and the switch 8 of the remote controller 7 is selected to perform the cold draft prevention function. .

次に、ステップ２にて室内制御部１２は室内熱交センサ１１の読込を定期的に行う。ステップ３にて、室内熱交センサ１１が第１の所定温度である１０℃未満を第１の所定時間である２時間継続することで、寒くなり暖房の必要な季節になったかを判断し、Ｎｏの場合はステップ１に戻り、Ｙｅｓの場合にはステップ４に進む。   Next, in step 2, the indoor control unit 12 periodically reads the indoor heat exchange sensor 11. In step 3, the indoor heat exchange sensor 11 continues for less than 10 ° C., which is the first predetermined temperature, for 2 hours, which is the first predetermined time, thereby determining whether the season has become cold and needs heating, If No, return to Step 1; if Yes, go to Step 4.

ステップ４では室内ファン５を最低回転数である３００ｒｐｍで１分間運転後に室温センサ１０の読込を約１０分間隔で断続的に行う。室内に冷風が吹き出すことを防止するために吹出口３の水平羽根１４は閉じた状態を保ち、ステップ５に進む。   In step 4, the room temperature sensor 10 is intermittently read at intervals of about 10 minutes after the indoor fan 5 is operated at 300 rpm, which is the minimum rotation speed, for 1 minute. In order to prevent cold air from blowing into the room, the horizontal blades 14 of the outlet 3 are kept closed, and the process proceeds to Step 5.

ステップ５では第２の所定時間である過去３０分間の室温上昇を比較し、室温上昇が５ｄｅｇ以上で無い場合は、Ｎｏでステップ１に戻り、室温上昇が５ｄｅｇ以上の場合には、石油ファンヒータやガスストーブなどの暖房専用機２８によって室内の暖房が行われていると判断し、Ｙｅｓでステップ６に進む。   In step 5, the room temperature rise of the past 30 minutes, which is the second predetermined time, is compared. If the room temperature rise is not 5 deg or more, the process returns to step 1 with No, and if the room temperature rise is 5 deg or more, the oil fan heater It is determined that the room is being heated by a dedicated heating device 28 such as a gas stove or the like, and the process proceeds to step 6 in Yes.

ステップ６では水平羽根１４を閉じたまま、室内ファン５は最低回転数である３００ｒｐｍ、圧縮機１７は最低回転の３０Ｈｚで暖房運転を開始する。   In step 6, with the horizontal blades 14 closed, the indoor fan 5 starts the heating operation at a minimum rotation speed of 300 rpm, and the compressor 17 starts at a minimum rotation of 30 Hz.

次に、ステップ７にて約１０分間隔で断続的に室内熱交センサ１１と室温センサ１０の読込を行いステップ８に進む。ステップ８では、室温と室内熱交温度の温度差を監視し、暖房運転によって室内熱交温度が室温以上の温度まで上昇するかを判断し、室内熱交温度が低い場合にはＮｏでステップ６に戻って現在の運転を継続し、室内熱交温度が上昇して室温以上の温度に成った場合には、室内機によるコールドドラフトが発生する心配が無くなったと判断して、ステップ１の運転停止状態に戻る。   Next, in step 7, the indoor heat exchange sensor 11 and the room temperature sensor 10 are intermittently read at intervals of about 10 minutes, and the process proceeds to step 8. In step 8, the temperature difference between the room temperature and the indoor heat exchange temperature is monitored, and it is determined whether the indoor heat exchange temperature rises to a temperature equal to or higher than the room temperature due to the heating operation. If the indoor heat exchange temperature rises to a temperature higher than room temperature, it is determined that there is no longer a concern about the cold draft caused by the indoor unit, and the operation of Step 1 is stopped. Return to state.

このようなコールドドラフト防止機能を設けることによって、冬期間空気調和機を使用しないで石油ファンヒーターやガスストーブ等の暖房専用機２８のみによって暖房を行った場合でも、室外機１６から室内機１を通じて冷気が発生し、部屋上部に設置される室内機１から冷気が下降して室内機１の下方が寒く感じることを防止することができるものである。また、コールドドラフト防止機能をリモコンにて選択可能にしたことで、家具などの配置の関係で室内機１の下方には人があまり近づかないような場合にはコールドドラフト防止機能を停止することを可能となる。   By providing such a cold draft prevention function, even when heating is performed only by a dedicated heating machine 28 such as an oil fan heater or a gas stove without using an air conditioner during the winter period, the outdoor unit 16 through the indoor unit 1 is used. It is possible to prevent cold air from being generated and the cold air descending from the indoor unit 1 installed in the upper part of the room and feeling the cold below the indoor unit 1. In addition, since the cold draft prevention function can be selected by the remote controller, the cold draft prevention function is stopped when a person is not very close to the lower side of the indoor unit 1 due to the arrangement of furniture or the like. It becomes possible.

１ 室内機
２ 吸込口
３ 吹出口
４ 室内熱交換器
５ 室内ファン
１０ 室温センサ
１１ 室内熱交センサ
１２ 室内制御部
１４ 水平羽根
１６ 室外機
１７ 圧縮機
２５ コールドドラフト防止部
２８ 暖房専用機 DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Suction port 3 Air outlet 4 Indoor heat exchanger 5 Indoor fan 10 Room temperature sensor 11 Indoor heat exchange sensor 12 Indoor control part 14 Horizontal blade | wing 16 Outdoor unit 17 Compressor 25 Cold draft prevention part 28 Heating exclusive machine

Claims (2)

室内機上面または前面に吸込口を、底面に吹出口を、内部には室内熱交換器と室内ファンを備え、前記吸込口と室内熱交換器と室内ファンと吹出口とを連通して送風経路を形成し、室外機には圧縮機と四方弁と室外熱交換器と膨張弁と室外ファンを備え、前記圧縮機と四方弁と室内熱交換器と膨張弁と室外熱交換器とを冷媒配管で順次接続して冷凍回路を形成し、この冷凍回路と室内ファンと室外ファンを制御部で制御し、室内の温度調節を行う空気調和機に於いて、前記吹出口には運転時に上下の送風方向を調整すると共に、停止時には自動で吹出口を閉じる水平羽根を設け、前記室内熱交換器の温度を検知する室内熱交センサと、室温を検知する室温センサとを設け、運転停止時に前記室内熱交換器の温度が第１の所定温度未満を第１の所定時間継続した時に、前記室内ファンを低回転で運転すると共に室温センサの読込を断続的に行い、前記室温センサの値が第２の所定時間以内で第２の所定温度以上上昇した時には、前記水平羽根にて吹出口を閉じたまま、圧縮機を低回転で暖房運転を開始し、室内熱交温度が室温以上に上昇したときに運転停止状態に戻るコールドドラフト防止機能を備えたことを特徴とする空気調和機。 A suction port is provided on the top or front surface of the indoor unit, a blower outlet is provided on the bottom, an indoor heat exchanger and an indoor fan are provided therein, and the suction port, the indoor heat exchanger, the indoor fan, and the blower outlet communicate with each other. The outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an outdoor fan, and the compressor, the four-way valve, the indoor heat exchanger, the expansion valve, and the outdoor heat exchanger are connected to a refrigerant pipe. Are connected in order to form a refrigeration circuit, and the refrigeration circuit, the indoor fan, and the outdoor fan are controlled by a control unit, and an air conditioner that adjusts the indoor temperature. with adjusting the direction, provided the horizontal vane to close the outlet automatically, upon stopping, the indoor heat exchange sensor for detecting the temperature of the indoor heat exchanger, provided a temperature sensor for detecting the room temperature, the chamber during shutdown temperature of the heat exchanger is less than the first predetermined temperature the first When the indoor fan is operated at a low speed and the room temperature sensor is intermittently read when the constant time continues, and when the value of the room temperature sensor rises above a second predetermined temperature within a second predetermined time, It has a cold draft prevention function that starts the heating operation at a low rotation of the compressor with the horizontal blades closed and returns to the shutdown state when the indoor heat exchange temperature rises above room temperature. Air conditioner. 前記コールドドラフト防止機能は、リモコンの操作によって選択可能とした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 cold draft prevention function can be selected by operating a remote controller .
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