JP5963539B2 - Air conditioner - Google Patents

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JP5963539B2
JP5963539B2 JP2012122270A JP2012122270A JP5963539B2 JP 5963539 B2 JP5963539 B2 JP 5963539B2 JP 2012122270 A JP2012122270 A JP 2012122270A JP 2012122270 A JP2012122270 A JP 2012122270A JP 5963539 B2 JP5963539 B2 JP 5963539B2
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outdoor
refrigerant
rotational speed
heat exchanger
air
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JP2013245922A (en
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豊 青山
豊 青山
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Mitsubishi Electric Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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Description

この発明は、冷媒と空気との熱交換を行う空冷式熱交換器を有する空気調和装置に関するものである。特に起動時に屋外の風（外風）の影響を受けている場合の動作に関するものである。   The present invention relates to an air conditioner having an air-cooled heat exchanger that performs heat exchange between refrigerant and air. In particular, the present invention relates to an operation in the case of being influenced by an outdoor wind (outside wind) at the time of startup.

例えば、従来の空冷式熱交換器を用いたヒートポンプ式空気調和装置は、冷媒を圧縮もしくは膨張により高温もしくは低温にし、その冷媒と熱交換器における空気との温度差により熱交換を行い、ヒートポンプを形成するものである。そのため、熱交換器における熱交換量は空気温度と冷媒温度との温度差や風量に依存する。そのため、室外機では冷媒回路内の温度や圧力をセンサーなどで検知しながらファン回転数や圧縮機周波数を制御している。また起動時には、外気温度や室内機の運転容量からあらかじめ決めておいた最適となるファン回転数や圧縮機周波数で起動し、冷凍サイクルの安定ポイントに向けて最短となるよう制御を行う（例えば特許文献１、２参照）。   For example, a conventional heat pump type air conditioner using an air-cooled heat exchanger makes a heat pump hot or cold by compressing or expanding the refrigerant, exchanging heat by the temperature difference between the refrigerant and the air in the heat exchanger. To form. Therefore, the heat exchange amount in the heat exchanger depends on the temperature difference between the air temperature and the refrigerant temperature and the air volume. Therefore, in the outdoor unit, the fan speed and the compressor frequency are controlled while detecting the temperature and pressure in the refrigerant circuit with a sensor or the like. Also, at the time of start-up, it is started at the optimum fan speed and compressor frequency determined in advance from the outside air temperature and the operating capacity of the indoor unit, and control is performed so as to be the shortest toward the stable point of the refrigeration cycle (for example, patents) References 1 and 2).

特開２００１−２６８９７２号公報（第１図）JP 2001-268972 A (FIG. 1) 特開２００１−２９２５８９号公報（第１図）JP 2001-292589 A (FIG. 1)

ここで、室外に設置する空冷式室外機のファンにおいては、例えば屋外の風（外風）の影響を受ける場合があり、理想的な状態とならない場合がある。例えば、外風の影響でファンモータに回生電力が発生し、コンデンサの過電圧等により異常停止する場合がある。また、室外ファンが起動できる回転数を超えて逆回転している場合は、室外ファンが起動できない場合がある。そのような場合は、圧縮機やファンを含め、室外機は起動をやめ、ファン回転数が低下するまで待機する場合が一般的である。しかしながら、待機するだけでは通常運転の状態に至るまでに時間がかかってしまう。   Here, the fan of the air-cooled outdoor unit installed outside may be affected by, for example, outdoor wind (outside wind) and may not be in an ideal state. For example, there is a case where regenerative power is generated in the fan motor due to the influence of the external wind, and the motor stops abnormally due to an overvoltage of the capacitor. In addition, when the outdoor fan is rotating in the reverse direction exceeding the speed at which the outdoor fan can be activated, the outdoor fan may not be activated. In such a case, the outdoor unit including the compressor and the fan generally stops starting and waits until the fan rotation speed decreases. However, it takes time to reach the normal operation state only by waiting.

この発明は、上記の課題を解決するためになされたもので、通常運転に至るまでの時間を短縮させるようにする空気調和装置を得ることを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an air conditioner that shortens the time until normal operation.

本発明に係る空気調和装置は、室外機と室内機とを配管接続して冷媒回路を構成する空気調和装置であって、室外機は、周波数可変に駆動し、冷媒を圧縮して吐出する圧縮機と、冷媒の流路切替を行うための切替装置と、屋外の空気と冷媒との熱交換を行う室外熱交換器と、回転数可変に駆動し、室外熱交換器に屋外の空気を通過させる室外ファンと、室外ファンの回転数を検知する回転数検知手段と、液状の冷媒の流入出を制御する室外流量制御装置と、圧縮機の吐出側配管と吸入側配管とを接続するバイパス配管と、バイパス配管の冷媒通過を制御するバイパス流量制御装置と、運転を開始するときの回転数検知手段の検知に係る回転数が所定回転数以上であると判断すると、室外ファンの回転方向及び運転モードに基づき、室外ファンが起動可能な回転数となって室外ファンを起動させて通常運転の動作を開始するまで、予備動作を行うように制御する制御装置とを備え、制御装置は、運転モードが冷房運転であり、室外ファンの回転方向が室外ファンの通常回転方向と逆方向である逆回転であると判断すると、室外流量制御装置に冷媒を流出させないようにし、バイパス流量制御装置に冷媒をバイパス配管に通過させるようにして、圧縮機を通常運転よりも低い周波数で起動させ、室外ファンが起動可能な回転数であると判断すると、室外流量制御装置に冷媒を流出させるようにし、バイパス流量制御装置に冷媒を通過させないようにして、圧縮機を通常運転の周波数で駆動させるものである。 An air conditioner according to the present invention is an air conditioner in which an outdoor unit and an indoor unit are connected by pipes to form a refrigerant circuit. The outdoor unit is a variable frequency drive that compresses and discharges refrigerant. Machine, switching device for switching the refrigerant flow path, outdoor heat exchanger for exchanging heat between the outdoor air and the refrigerant, and driving the outdoor air through the outdoor heat exchanger with variable rotation speed An outdoor fan to be operated, a rotational speed detecting means for detecting the rotational speed of the outdoor fan, an outdoor flow rate control device for controlling inflow and outflow of the liquid refrigerant, and a bypass pipe for connecting a discharge side pipe and a suction side pipe of the compressor And the bypass flow rate control device for controlling the passage of the refrigerant in the bypass pipe, and the rotational direction and operation of the outdoor fan when it is determined that the rotational speed related to detection by the rotational speed detection means when starting operation is equal to or greater than a predetermined rotational speed. Outdoor fan based on mode Activated so the outdoor fan become bootable rotational speed to the start of operation in the normal operation, and a control unit for controlling to perform a preliminary operation, the controller, the operation mode is the cooling operation, the outdoor If it is determined that the rotation direction of the fan is the reverse rotation that is the reverse direction of the normal rotation direction of the outdoor fan, the refrigerant is not allowed to flow out to the outdoor flow rate control device, and the refrigerant is allowed to pass through the bypass pipe. When the compressor is started at a frequency lower than that of normal operation and the outdoor fan is determined to be capable of starting, the refrigerant is allowed to flow out to the outdoor flow rate control device, and the refrigerant is not allowed to pass through the bypass flow rate control device. In this way, the compressor is driven at the normal operation frequency .

本発明によれば、運転を行う際、制御装置は、例えば外風の影響を受けて、室外ファンが所定回転数以上で回転しているものと判断すると、室外ファンを起動させずに予備動作を行うようにしたので、例えば外風が収まって室外ファンを起動してから通常運転に至るまでの時間を短縮することができる。   According to the present invention, when performing the operation, when the control device determines that the outdoor fan is rotating at a predetermined rotational speed or more due to, for example, the influence of outside wind, the control device performs the preliminary operation without starting the outdoor fan. Thus, for example, it is possible to shorten the time from the start of the outdoor fan when the outside wind is settled to the normal operation.

本発明の実施の形態に１に係る空気調和装置の構成を示す図である。It is a figure which shows the structure of the air conditioning apparatus which concerns on embodiment 1 of this invention. 能力、室外ファンの回転数、外気温度及び室内温度の関係を説明する図である。It is a figure explaining the relationship between capability, the rotation speed of an outdoor fan, outdoor temperature, and room temperature. 実施の形態１に係る外風の影響を受けているときに冷房運転を行う際の動作を説明するための図である。It is a figure for demonstrating the operation | movement at the time of performing a cooling operation when it receives to the influence of the external wind which concerns on Embodiment 1. FIG. 実施の形態２に係る外風の影響を受けているときに暖房運転を行う際の動作を説明するための図である。It is a figure for demonstrating the operation | movement at the time of performing heating operation when it receives to the influence of the external wind which concerns on Embodiment 2. FIG.

実施の形態１．
図１は本発明の実施の形態に１に係る空気調和装置の構成を示す図である。本実施の形態の空気調和装置は、室外機１００と複数の室内機２００とを備え、これらが冷媒配管で連結され、主となる冷媒回路（主冷媒回路という）を構成して冷媒を循環させている。ここで、本実施の形態の空気調和装置は３台の室内機２００を備えているが、設置台数を３台に限定するものではない。また、添字で区別等している複数の同種の機器等について、特に区別したり、特定したりする必要がない場合には、添字を省略して記載する場合もある。そして、温度、圧力等の高低については、特に絶対的な値との関係で高低等が定まっているものではなく、システム、装置等における状態、動作等において相対的に定まるものとする。 Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of an air-conditioning apparatus 1 according to Embodiment 1 of the present invention. The air conditioner according to the present embodiment includes an outdoor unit 100 and a plurality of indoor units 200, which are connected by a refrigerant pipe, constitute a main refrigerant circuit (referred to as a main refrigerant circuit), and circulate the refrigerant. ing. Here, although the air conditioning apparatus of the present embodiment includes three indoor units 200, the number of installed units is not limited to three. In addition, when there is no need to particularly distinguish or specify a plurality of similar devices that are distinguished by subscripts, the subscripts may be omitted. The level of temperature, pressure, etc. is not particularly determined in relation to absolute values, but is relatively determined in the state, operation, etc. of the system, apparatus, and the like.

図１において、室外機１００は、本実施の形態においては、圧縮機２、切替装置６、室外熱交換器１、室外ファン４、アキュームレータ３、室外膨張弁９、二重管７及びバイパス膨張弁８の各装置（手段）を有している。   In FIG. 1, an outdoor unit 100 includes a compressor 2, a switching device 6, an outdoor heat exchanger 1, an outdoor fan 4, an accumulator 3, an outdoor expansion valve 9, a double pipe 7, and a bypass expansion valve in the present embodiment. 8 devices (means).

圧縮機２は、吸入した冷媒を圧縮して吐出する。ここで、圧縮機２は、インバータ装置等を備え、駆動周波数を任意に変化させることにより、圧縮機２の容量（単位時間あたりの冷媒を送り出す量）を細かく変化させることができるものとする。   The compressor 2 compresses and discharges the sucked refrigerant. Here, the compressor 2 includes an inverter device and the like, and can arbitrarily change the capacity of the compressor 2 (the amount of refrigerant sent out per unit time) by arbitrarily changing the drive frequency.

四方弁等の切替装置６は、室外制御装置１１０からの指示に基づいて、例えば冷房運転時と暖房運転時とによって冷媒の流れを切り換える。また、室外熱交換器１は、冷媒と空気（室外の空気）との熱交換を行う。例えば、暖房運転時においては蒸発器として機能し、室外膨張弁（絞り装置）９を介して流入した低圧の冷媒と空気との熱交換を行い、冷媒を蒸発させ、気化させる。また、冷房運転時においては凝縮器として機能し、切替装置６側から流入した圧縮機２において圧縮された冷媒と空気との熱交換を行い、冷媒を凝縮して液化させる。室外熱交換器１には、冷媒と空気との熱交換を効率よく行うため、送風機となる室外ファン４が設けられている。ファンモータ５は、室外ファン４を駆動させるためのモータである。室外ファン４についても、インバータ装置によりファンモータ５の駆動周波数を任意に変化させてファンの回転速度を細かく変化させることができる。ここで、ファンモータ５による室外ファン４の回転方向を正回転とする。   The switching device 6 such as a four-way valve switches the flow of the refrigerant, for example, depending on the cooling operation and the heating operation, based on an instruction from the outdoor control device 110. The outdoor heat exchanger 1 performs heat exchange between the refrigerant and air (outdoor air). For example, during the heating operation, the refrigerant functions as an evaporator, performs heat exchange between the low-pressure refrigerant flowing in through the outdoor expansion valve (throttle device) 9 and air, and evaporates and vaporizes the refrigerant. Moreover, it functions as a condenser during the cooling operation, and performs heat exchange between the refrigerant compressed in the compressor 2 flowing in from the switching device 6 side and air, thereby condensing and liquefying the refrigerant. The outdoor heat exchanger 1 is provided with an outdoor fan 4 serving as a blower in order to efficiently exchange heat between the refrigerant and the air. The fan motor 5 is a motor for driving the outdoor fan 4. Also for the outdoor fan 4, the rotational speed of the fan can be finely changed by arbitrarily changing the drive frequency of the fan motor 5 by the inverter device. Here, the rotation direction of the outdoor fan 4 by the fan motor 5 is assumed to be normal rotation.

冷媒間熱交換器となる二重管７は、冷媒回路の主となる流路を流れる冷媒と、その流路から分岐してバイパス膨張弁８により流量調整された冷媒との間で熱交換を行う。特に冷房運転時において冷媒を過冷却する必要がある場合に、冷媒を過冷却して室内機２００に供給するものである。バイパス膨張弁８を介して流れる液体は、バイパス配管を介してアキュームレータ３に戻される。アキュームレータ３は、圧縮機２の吸込み側（低圧側）において、例えば液体の余剰冷媒を溜めておく手段である。   The double pipe 7 serving as an inter-refrigerant heat exchanger exchanges heat between the refrigerant flowing through the main flow path of the refrigerant circuit and the refrigerant branched from the flow path and adjusted in flow rate by the bypass expansion valve 8. Do. In particular, when it is necessary to supercool the refrigerant during the cooling operation, the refrigerant is supercooled and supplied to the indoor unit 200. The liquid flowing through the bypass expansion valve 8 is returned to the accumulator 3 through the bypass pipe. The accumulator 3 is means for storing, for example, liquid excess refrigerant on the suction side (low pressure side) of the compressor 2.

また、本実施の形態の室外機１００は、外気温度センサ１０、高圧用圧力センサ１１及び低圧用圧力センサ１２を有している。外気温度センサ１０は、室外熱交換器１の付近に設けられ、外気温度（屋外の気温）を検出する。また、高圧用圧力センサ１１は、圧縮機２の吐出側（出口側）配管における圧力（ヒートポンプ回路の高圧側の圧力）を検出する。低圧用圧力センサ１２は、アキュームレータ３の入口側配管における圧力（ヒートポンプ回路の低圧側の圧力）を検出する。   The outdoor unit 100 according to the present embodiment includes an outside air temperature sensor 10, a high pressure sensor 11, and a low pressure sensor 12. The outside air temperature sensor 10 is provided in the vicinity of the outdoor heat exchanger 1 and detects the outside air temperature (outdoor air temperature). The high pressure sensor 11 detects the pressure (pressure on the high pressure side of the heat pump circuit) in the discharge side (outlet side) piping of the compressor 2. The low pressure sensor 12 detects the pressure in the inlet side piping of the accumulator 3 (pressure on the low pressure side of the heat pump circuit).

室外制御装置１１０は、例えばマイクロコンピュータ等からなる。例えば、冷凍空気調和装置内の各種検出手段（センサ）の検出に係るデータに基づいて、インバータ回路制御による圧縮機２の駆動周波数制御等、各手段を制御して空気調和装置全体の動作制御を行う。また、回転数検知手段１２０は、室外ファン４の回転数を検知する。   The outdoor control device 110 is composed of, for example, a microcomputer. For example, based on data relating to detection by various detection means (sensors) in the refrigeration air conditioner, the operation control of the entire air conditioner is controlled by controlling each means such as the drive frequency control of the compressor 2 by inverter circuit control. Do. Further, the rotation speed detection means 120 detects the rotation speed of the outdoor fan 4.

一方、室内機２００は、室内熱交換器１３、室内膨張弁２１及び室内ファン１７を有している。室内熱交換器１３は冷媒と空調対象空間の空気との熱交換を行う。例えば、暖房運転時においては凝縮器として機能し、気体の冷媒が流れる配管から流入した冷媒と空気との熱交換を行い、冷媒を凝縮させて液化（又は気液二相化）させて流出させる。一方、冷房運転時においては蒸発器として機能し、室内膨張弁２１により低圧状態にされた冷媒と空気との熱交換を行い、冷媒に空気の熱を奪わせて蒸発させて気化させて流出させる。また、室内機２００には、熱交換を行う空気の流れを調整するための室内ファン１７が設けられている。特に限定するものではないが、この室内ファン１７の駆動速度（風量）は、例えば利用者の設定により決定される。室内膨張弁２１は、開度を変化させることで、室内熱交換器１３内における冷媒の圧力を調整するために設ける。   On the other hand, the indoor unit 200 includes the indoor heat exchanger 13, the indoor expansion valve 21, and the indoor fan 17. The indoor heat exchanger 13 performs heat exchange between the refrigerant and the air in the air-conditioning target space. For example, during heating operation, it functions as a condenser, performs heat exchange between the refrigerant flowing in from the pipe through which the gaseous refrigerant flows and the air, condenses the refrigerant and liquefies (or gas-liquid two-phase) to flow out . On the other hand, during the cooling operation, the refrigerant functions as an evaporator, exchanges heat between the refrigerant and the air that have been brought to a low pressure state by the indoor expansion valve 21, evaporates the refrigerant by evaporating the heat of the air, and causes the refrigerant to flow out. . The indoor unit 200 is provided with an indoor fan 17 for adjusting the flow of air for heat exchange. Although it does not specifically limit, the drive speed (air volume) of this indoor fan 17 is determined by a user's setting, for example. The indoor expansion valve 21 is provided to adjust the pressure of the refrigerant in the indoor heat exchanger 13 by changing the opening degree.

次に冷房運転時における空気調和装置の動作について説明する。まず、冷房運転時の主となる回路における基本的な冷媒循環について説明する。ここで、冷房運転時には、室外流量制御装置となる室外膨張弁９は全開にしておくものとする。圧縮機２により加圧されて吐出した高温、高圧ガス（気体）の冷媒は、切替装置６から室外熱交換器１内を通過することで凝縮し、液冷媒となって室外機１００を流出する。このとき、二重管７を通過する冷媒は、バイパス膨張弁８を通過した冷媒との間で熱交換することで過冷却される。冷媒を過冷却して負荷側ユニット２００に供給するものである。バイパス膨張弁８、二重管７を通過した冷媒はアキュームレータ３に流れる。   Next, the operation of the air conditioner during cooling operation will be described. First, basic refrigerant circulation in a main circuit during cooling operation will be described. Here, during the cooling operation, the outdoor expansion valve 9 serving as the outdoor flow rate control device is fully opened. The high-temperature, high-pressure gas (gas) refrigerant pressurized and discharged by the compressor 2 is condensed by passing through the outdoor heat exchanger 1 from the switching device 6 and flows out of the outdoor unit 100 as a liquid refrigerant. . At this time, the refrigerant passing through the double pipe 7 is supercooled by exchanging heat with the refrigerant passing through the bypass expansion valve 8. The refrigerant is supercooled and supplied to the load side unit 200. The refrigerant that has passed through the bypass expansion valve 8 and the double pipe 7 flows to the accumulator 3.

配管を通って室内機２００に流入した冷媒は、各室内機２００においては、室内膨張弁２１の開度調整により圧力調整された低温低圧の気液二相冷媒が室内熱交換器１３内を通過して蒸発して流出する。そして、配管を通って室外機１００に流入し、切替装置６、アキュームレータ３を介して圧縮機２に吸入され、再度、圧縮機２において加圧され吐出することで循環する。   The refrigerant that has flowed into the indoor unit 200 through the pipe passes through the indoor heat exchanger 13 in each indoor unit 200 as low-temperature and low-pressure gas-liquid two-phase refrigerant whose pressure is adjusted by adjusting the opening of the indoor expansion valve 21. Evaporate and flow out. And it flows in into the outdoor unit 100 through piping, is suck | inhaled by the compressor 2 via the switching device 6 and the accumulator 3, and it circulates by being pressurized and discharged in the compressor 2 again.

本発明の室外機１００において、室外熱交換器１の熱交換容量は風量（＝室外ファン４の回転数）により決まってくる。そして、風量は、正回転と、正回転とは逆の回転（逆回転）とで回転数に対して異なる特性を有している。そこで、運転を行う際、例えば外風等により室外ファン４が正回転している場合と逆回転している場合とにおける室外制御装置１１０による制御等の処理について説明する。   In the outdoor unit 100 of the present invention, the heat exchange capacity of the outdoor heat exchanger 1 is determined by the air volume (= the rotational speed of the outdoor fan 4). The air volume has different characteristics with respect to the number of rotations between forward rotation and reverse rotation (reverse rotation). Therefore, when performing the operation, for example, processing such as control by the outdoor control device 110 in the case where the outdoor fan 4 is rotating forward and in the reverse rotation due to the outside wind or the like will be described.

本実施の形態においては冷房運転を行う際の動作について説明する。室外制御装置１１０は、ファンモータ５を電力駆動させていないのに、例えば外風により、室外ファン４が所定回転数以上で正回転又は逆回転しているかどうかを判断する。従来は通常動作が可能となるまで待機していたが、本実施の形態では、所定回転数以上で回転しているものと判断すると、通常動作に移行する前の予備動作を行う。   In this embodiment, an operation when performing a cooling operation will be described. The outdoor control device 110 determines whether the outdoor fan 4 is rotating forward or backward at a predetermined rotational speed or more by, for example, outside wind, although the fan motor 5 is not driven by electric power. Conventionally, it waits until normal operation becomes possible. However, in this embodiment, when it is determined that the motor is rotating at a predetermined rotation speed or higher, a preliminary operation before shifting to the normal operation is performed.

図２は能力、室外ファンの回転数、外気温度及び室内温度の関係を説明する図である。所定回転数以上で正回転していると判断すると、室外制御装置１１０は、例えば回転数検知手段１２０の検知に係る回転数、外気温度、室外機性能の特性等に基づいて室外熱交換器１の凝縮器能力（凝縮器として機能する場合の能力）を計算する（図２（ａ））。次に運転要求のある室内機２００の室内温度、設定風量等に基づいて、発揮させることができる蒸発能力を計算する（図２（ｂ））。さらに、凝縮器能力に対応する蒸発器能力となるように蒸発器能力に制限を掛ける（図２（ｃ））。この制限は、室内機２００の馬力設定（熱交換容量）などの定格能力に係る情報（データ）、室内機２００の運転要求の有無等に基づいて、発揮させることができる蒸発能力以下となるように、運転を行う室内機２００を選択し、運転可否の指令を送る。ここで、室内機２００を選択する判断基準として、例えば、吸い込み温度と設定温度との温度差が大きい室内機２００の優先順位を高くするようにする。さらに、圧縮機２が凝縮器能力に対応した最大周波数制限値（図２（ｄ））を超えないように制御しつつ、選択した室内機２００により冷房運転を行うようにする。   FIG. 2 is a diagram for explaining the relationship among the capacity, the rotational speed of the outdoor fan, the outside air temperature, and the room temperature. If it is determined that the vehicle is rotating forward at a predetermined rotational speed or higher, the outdoor control device 110 determines the outdoor heat exchanger 1 based on, for example, the rotational speed related to detection by the rotational speed detection means 120, the outside air temperature, the outdoor unit performance characteristics, and the like. Is calculated (capacity when functioning as a condenser) (FIG. 2A). Next, the evaporation capacity that can be exhibited is calculated based on the indoor temperature, the set air volume, etc., of the indoor unit 200 that is requested to operate (FIG. 2B). Further, the evaporator capacity is limited so that the evaporator capacity corresponds to the condenser capacity (FIG. 2 (c)). This restriction is less than the evaporation capacity that can be exhibited based on information (data) related to the rated capacity such as the horsepower setting (heat exchange capacity) of the indoor unit 200, the presence / absence of an operation request of the indoor unit 200, and the like. Next, the indoor unit 200 to be operated is selected, and a command for whether or not to drive is sent. Here, as a criterion for selecting the indoor unit 200, for example, the priority of the indoor unit 200 having a large temperature difference between the suction temperature and the set temperature is set higher. Further, the cooling operation is performed by the selected indoor unit 200 while controlling the compressor 2 so as not to exceed the maximum frequency limit value (FIG. 2D) corresponding to the condenser capacity.

外風等による室外ファン４の回転数が低下し、外風の影響が小さくなり、室外ファン４を電力で駆動できる状態となったものと判断すると、ファンモータ５を電力により駆動させて室外ファン４を回転させ、圧縮機の最大周波数制限や室内機の運転容量制限を解除させ、通常運転に戻すようにする。   If it is determined that the rotational speed of the outdoor fan 4 due to the outside wind or the like is reduced, the influence of the outside wind is reduced, and the outdoor fan 4 can be driven with electric power, the fan motor 5 is driven with electric power to drive the outdoor fan. 4 is rotated to release the maximum frequency limit of the compressor and the operation capacity limit of the indoor unit, and return to the normal operation.

図３は実施の形態１に係る外風の影響を受けているときに冷房運転起動を行う際の動作を説明するための図である。一方、室外制御装置１１０は、室外ファン４が所定回転数以上で逆回転していると判断すると、室外膨張弁９を閉止させる。また、バイパス膨張弁８を開にさせる。その後、通常時の駆動周波数よりも低い駆動周波数で圧縮機２の駆動を開始する。この場合、基本的には蒸発器として機能する熱交換器がないために低圧側の圧力が低下する。そして、室外熱交換器と二重管７との間の配管にある冷媒は二重管７、バイパス膨張弁８を通過して、圧縮機２の吸入側配管からアキュームレータ３に流入する。   FIG. 3 is a view for explaining an operation when the cooling operation is started when the influence of the external wind according to the first embodiment is received. On the other hand, if the outdoor control device 110 determines that the outdoor fan 4 is rotating backward at a predetermined rotational speed or more, the outdoor control device 110 closes the outdoor expansion valve 9. Further, the bypass expansion valve 8 is opened. Thereafter, driving of the compressor 2 is started at a driving frequency lower than the normal driving frequency. In this case, basically, since there is no heat exchanger functioning as an evaporator, the pressure on the low pressure side decreases. Then, the refrigerant in the pipe between the outdoor heat exchanger and the double pipe 7 passes through the double pipe 7 and the bypass expansion valve 8 and flows into the accumulator 3 from the suction side pipe of the compressor 2.

一方、室内機２００側では、室内ファン１７を少ない回転数で駆動させる。このとき、室内熱交換器１３では、室内ファン１７の駆動によって発生する微風により、空気と室内熱交換器１３内に溜まっている冷媒とが熱交換することで、擬似的に蒸発器として機能する。このため、室内熱交換器１３内に溜まっている冷媒は蒸発し、切替装置６、アキュームレータ３を通って圧縮機２へ吸入される。そして、室外熱交換器１へ送られたガス状の冷媒は外風で回っている室外ファン４によって凝縮され、室外熱交換器１に溜まる。以上の動作を、室外ファン４が外風により所定回転数以上で逆回転している間行う。   On the other hand, on the indoor unit 200 side, the indoor fan 17 is driven at a low rotational speed. At this time, the indoor heat exchanger 13 functions as a pseudo-evaporator by exchanging heat between the air and the refrigerant accumulated in the indoor heat exchanger 13 by the breeze generated by driving the indoor fan 17. . Therefore, the refrigerant accumulated in the indoor heat exchanger 13 evaporates and is sucked into the compressor 2 through the switching device 6 and the accumulator 3. Then, the gaseous refrigerant sent to the outdoor heat exchanger 1 is condensed by the outdoor fan 4 that is rotating by the outside wind, and accumulates in the outdoor heat exchanger 1. The above operation is performed while the outdoor fan 4 is rotating in the reverse direction at a predetermined rotational speed or more due to the external wind.

そして、室外ファン４の回転数が所定回転数より少なくなったものと判断すると、ファンモータ５の駆動により、室外ファン４を駆動させるようにする。また、圧縮機２を通常の駆動周波数で駆動させる。   If it is determined that the rotational speed of the outdoor fan 4 is less than the predetermined rotational speed, the outdoor fan 4 is driven by driving the fan motor 5. Further, the compressor 2 is driven at a normal driving frequency.

以上のように、実施の形態１の空気調和装置においては、冷房運転を行う際、室外制御装置１１０は、例えば外風の影響を受けて、室外ファン４が所定回転数以上で正回転又は逆回転しているかどうかを判断し、所定回転数以上で正回転しているものと判断すると、室外機１００における凝縮器能力等に基づいて、最大周波数制限値を設定し、選択した室内機２００を運転制御する予備動作を行うようにする。また、所定回転数以上で逆回転しているものと判断すると、室外ファン４を起動させずに圧縮機２だけを起動させてアキュームレータ３、室内機熱交換器１３にある冷媒を室外熱交換器１へ移動させる予備動作を行うようにする。このため、起動後の高圧の上昇を早めることができ、例えば外風が収まって室外ファン４を起動してから通常運転に至るまでの時間を短縮することができる。   As described above, in the air-conditioning apparatus of Embodiment 1, when performing the cooling operation, the outdoor control device 110 is affected by, for example, the outside wind, and the outdoor fan 4 rotates forward or backward at a predetermined rotational speed or higher. It is determined whether or not it is rotating, and if it is determined that it is rotating forward at a predetermined rotational speed or more, a maximum frequency limit value is set based on the condenser capacity or the like in the outdoor unit 100, and the selected indoor unit 200 is Perform preliminary operation to control operation. If it is determined that the reverse rotation is greater than a predetermined number of revolutions, only the compressor 2 is activated without activating the outdoor fan 4, and the refrigerant in the accumulator 3 and the indoor unit heat exchanger 13 is transferred to the outdoor heat exchanger. The preliminary movement to move to 1 is performed. For this reason, the increase in the high pressure after the start can be accelerated, and for example, the time from the start of the outdoor fan 4 to the normal operation after the outside wind has settled can be shortened.

実施の形態２．
上述の実施の形態においては、冷房運転を行う際、外風の影響により室外ファン４が所定回転数以上で正回転又は逆回転している場合の予備動作について説明した。本実施の形態においては暖房運転での起動を行う際の動作について説明する。 Embodiment 2. FIG.
In the above-described embodiment, the preliminary operation in the case where the outdoor fan 4 is rotating forward or backward at a predetermined rotational speed or more due to the influence of the outside wind when performing the cooling operation has been described. In the present embodiment, the operation when starting in the heating operation will be described.

ここで、暖房運転時における空気調和装置の動作について説明する。まず、暖房運転時の主となる冷媒回路における基本的な冷媒循環について説明する。圧縮機２により加圧されて吐出した高温、高圧ガス（気体）の冷媒は、切替装置６を通過して室外機１００から流出する。そして、配管を通って、各室内機２００に流入する。各室内機２００においては、室内膨張弁２１の開度調整により圧力調整され、室内熱交換器１３内を通過することにより凝縮し、中間圧力の液体または気液二相状態の冷媒となって室内機２００を流出する。配管を通って室外機１００に流入した冷媒は、室外膨張弁９の開度調整により圧力調整され、室外熱交換器１内を通過することで蒸発し、ガスの冷媒となって切替装置６、アキュームレータ３を介して圧縮機２に吸入され、前述したように再度加圧され吐出することで循環する。   Here, operation | movement of the air conditioning apparatus at the time of heating operation is demonstrated. First, basic refrigerant circulation in the main refrigerant circuit during heating operation will be described. The high-temperature, high-pressure gas (gas) refrigerant pressurized and discharged by the compressor 2 passes through the switching device 6 and flows out of the outdoor unit 100. And it flows into each indoor unit 200 through piping. In each indoor unit 200, the pressure is adjusted by adjusting the opening degree of the indoor expansion valve 21, condensed by passing through the indoor heat exchanger 13, and becomes an intermediate-pressure liquid or a gas-liquid two-phase refrigerant. The machine 200 flows out. The refrigerant flowing into the outdoor unit 100 through the pipe is pressure-adjusted by adjusting the opening degree of the outdoor expansion valve 9, evaporates by passing through the outdoor heat exchanger 1, becomes a gas refrigerant, and the switching device 6. It is sucked into the compressor 2 through the accumulator 3 and circulated by being pressurized and discharged again as described above.

室外制御装置１１０は、例えば外風により、ファンモータ５を電力で駆動させることなく、室外ファン４が所定回転数以上で正回転又は逆回転しているかどうかを判断する。所定回転数以上で回転しているものと判断すると、通常動作に移行する前の予備動作を行う。   The outdoor control device 110 determines whether the outdoor fan 4 is rotating forward or backward at a predetermined rotational speed or more without driving the fan motor 5 with electric power, for example, by outside wind. If it is determined that the motor is rotating at a predetermined rotational speed or more, a preliminary operation before the transition to the normal operation is performed.

まず、所定回転数以上で正回転していると判断すると、室外制御装置１１０は、例えば回転数検知手段１２０の検知に係る回転数、外気温度、室外機性能の特性等に基づいて室外熱交換器１の蒸発器能力（蒸発器として機能する場合の能力）を計算する。次に運転要求のある室内機２００の室内温度、設定風量等に基づいて、発揮させることができる凝縮能力を計算する。さらに、蒸発器能力に対応する凝縮器能力となるように凝縮器能力に制限を掛ける。この制限は、室内機２００の馬力設定などの定格能力に係る情報（データ）、室内機２００の運転要求の有無等とに基づいて、発揮させることができる凝縮能力以下となるように、運転を行う室内機２００を選択し、運転可否の指令を送る。ここで、室内機２００を選択する判断基準として、例えば、吸い込み温度と設定温度との温度差が大きい室内機２００の優先順位を高くするようにする。さらに、圧縮機２が蒸発器能力に対応した最大周波数制限値を超えないように制御しつつ、選択した室内機２００により暖房運転を行うようにする。   First, when it is determined that the vehicle is rotating forward at a predetermined rotational speed or more, the outdoor control device 110 performs outdoor heat exchange based on, for example, the rotational speed, the outdoor temperature, the outdoor unit performance characteristics, and the like related to detection by the rotational speed detection means 120. The evaporator capacity (capacity when functioning as an evaporator) of the container 1 is calculated. Next, the condensing capacity that can be exhibited is calculated based on the indoor temperature, the set air volume, etc., of the indoor unit 200 that is requested to operate. Furthermore, the condenser capacity is limited so that the condenser capacity corresponds to the evaporator capacity. Based on information (data) relating to the rated capacity such as the horsepower setting of the indoor unit 200, presence / absence of an operation request of the indoor unit 200, etc., this restriction is performed so that the operation is less than the condensing capacity that can be exhibited. The indoor unit 200 to be performed is selected, and a command for whether or not to drive is sent. Here, as a criterion for selecting the indoor unit 200, for example, the priority of the indoor unit 200 having a large temperature difference between the suction temperature and the set temperature is set higher. Furthermore, heating operation is performed by the selected indoor unit 200 while controlling so that the compressor 2 does not exceed the maximum frequency limit value corresponding to the evaporator capacity.

図４は実施の形態２に係る外風の影響を受けているときに暖房運転を行う際の動作を説明するための図である。一方、例えば運転を停止した状態から暖房運転を行う際、室外制御装置１１０は、室外ファン４が所定回転数以上で逆回転していると判断すると、圧縮機２を通常時より低い駆動周波数で起動させる。   FIG. 4 is a diagram for explaining an operation when performing the heating operation when being affected by the external wind according to the second embodiment. On the other hand, for example, when performing the heating operation from a state in which the operation is stopped, the outdoor control device 110 determines that the outdoor fan 4 is rotating backward at a predetermined rotation speed or higher, and causes the compressor 2 to be driven at a lower drive frequency than normal. Start.

また、室内機２００側では、室内膨張弁２１を通常の初期開度より小さく設定し、冷媒の流れを制限すると共に室内ファン１７を少ない回転数で駆動させる。このとき、室内熱交換器１３では、室内ファン１７の駆動によって発生する微風により、空気と冷媒とが熱交換することで凝縮器として機能する。このため、アキュームレータ３に溜まっている液冷媒を室内熱交換器１３へ移動させ、室内熱交換器１３に液状の冷媒をためることができる。これにより、その後、通常動作に移行したときに凝縮器である室内熱交換器１３の性能を制限し、高圧が上昇しやすくなると共にアキュームレータ３に溜まっている液冷媒を回路内に移動することでヒートポンプ回路を循環する冷媒量を確保することができる。このため、例えば、冷媒寝込み等による冷媒不足を解消して起動遅延を防止することができる。   On the indoor unit 200 side, the indoor expansion valve 21 is set to be smaller than the normal initial opening, restricting the flow of the refrigerant and driving the indoor fan 17 at a low rotational speed. At this time, the indoor heat exchanger 13 functions as a condenser by exchanging heat between the air and the refrigerant by the breeze generated by driving the indoor fan 17. For this reason, the liquid refrigerant accumulated in the accumulator 3 can be moved to the indoor heat exchanger 13, and the liquid refrigerant can be accumulated in the indoor heat exchanger 13. As a result, the performance of the indoor heat exchanger 13 that is a condenser is limited when the operation is shifted to the normal operation, and the high pressure is easily increased and the liquid refrigerant accumulated in the accumulator 3 is moved into the circuit. The amount of refrigerant circulating in the heat pump circuit can be secured. For this reason, for example, the refrigerant shortage due to the refrigerant stagnation or the like can be solved and the activation delay can be prevented.

以上のように、実施の形態２の空気調和装置においては、暖房運転を行う際、室外制御装置１１０は、例えば外風の影響を受けて、室外ファン４が所定回転数以上で正回転又は逆回転しているかどうかを判断し、所定回転数以上で正回転しているものと判断すると、室外機１００における蒸発器能力等に基づいて、最大周波数制限値を設定し、選択した室内機２００を運転制御する予備動作を行うようにする。また、室外ファン４が所定回転数以上で逆回転している場合に、圧縮機２のみを起動させて、アキュームレータ３から室内熱交換器１３へ冷媒を移動しておくようにする。このため、通常運転になったときに、アキュームレータ３への冷媒寝込みによる冷媒回路内の冷媒不足を解消することができ、暖房運転時の低圧側の圧力低下を防止することができる。以上のことから、空気調和装置において、冷凍サイクルが安定するまでの時間を短縮することが可能である。   As described above, in the air conditioning apparatus of the second embodiment, when performing the heating operation, the outdoor control device 110 is affected by, for example, the outside wind, and the outdoor fan 4 rotates forward or backward at a predetermined rotational speed or higher. If it is determined whether or not it is rotating, and if it is determined that it is rotating forward at a predetermined number of revolutions or more, a maximum frequency limit value is set based on the evaporator capacity or the like in the outdoor unit 100, and the selected indoor unit 200 is Perform preliminary operation to control operation. Further, when the outdoor fan 4 rotates in the reverse direction at a predetermined rotational speed or higher, only the compressor 2 is activated to move the refrigerant from the accumulator 3 to the indoor heat exchanger 13. For this reason, when it becomes a normal driving | operation, the refrigerant | coolant shortage in the refrigerant circuit by the refrigerant stagnation to the accumulator 3 can be eliminated, and the pressure drop by the side of the low voltage | pressure at the time of heating operation can be prevented. From the above, in the air conditioner, it is possible to shorten the time until the refrigeration cycle is stabilized.

１ 室外熱交換器、２ 圧縮機、３ アキュームレータ、４ 室外ファン、５ ファンモータ、６ 切替装置、７ 二重管、８ バイパス膨張弁、９ 室外膨張弁、１０ 外気温度センサ、１１ 高圧用圧力センサ、１２ 低圧用圧力センサ、１３，１３ａ，１３ｂ，１３ｃ 室内熱交換器、１７，１７ａ，１７ｂ，１７ｃ 室内ファン、２１，２１ａ，２１ｂ，２１ｃ 室内膨張弁、１００ 室外機、１１０ 室外制御装置、１２０ 回転数検知手段、２００ 室内機。   1 outdoor heat exchanger, 2 compressor, 3 accumulator, 4 outdoor fan, 5 fan motor, 6 switching device, 7 double pipe, 8 bypass expansion valve, 9 outdoor expansion valve, 10 outdoor temperature sensor, 11 high pressure sensor , 12 Low pressure sensor, 13, 13a, 13b, 13c Indoor heat exchanger, 17, 17a, 17b, 17c Indoor fan, 21, 21a, 21b, 21c Indoor expansion valve, 100 Outdoor unit, 110 Outdoor control device, 120 Rotational speed detection means, 200 indoor unit.

Claims (6)

室外機と室内機とを配管接続して冷媒回路を構成する空気調和装置であって、
前記室外機は、
周波数可変に駆動し、冷媒を圧縮して吐出する圧縮機と、
冷媒の流路切替を行うための切替装置と、
屋外の空気と冷媒との熱交換を行う室外熱交換器と、
回転数可変に駆動し、前記室外熱交換器に前記屋外の空気を通過させる室外ファンと、
該室外ファンの回転数を検知する回転数検知手段と、
液状の冷媒の流入出を制御する室外流量制御装置と、
前記圧縮機の吐出側配管と吸入側配管とを接続するバイパス配管と、
該バイパス配管の冷媒通過を制御するバイパス流量制御装置と、
運転を開始するときの前記回転数検知手段の検知に係る回転数が所定回転数以上であると判断すると、前記室外ファンの回転方向及び運転モードに基づき、前記室外ファンが起動可能な回転数となって前記室外ファンを起動させて通常運転の動作を開始するまで、予備動作を行うように制御する制御装置とを備え、
前記制御装置は、
前記運転モードが冷房運転であり、前記室外ファンの回転方向が前記室外ファンの通常回転方向と逆方向である逆回転であると判断すると、前記室外流量制御装置に冷媒を流出させないようにし、前記バイパス流量制御装置に冷媒を前記バイパス配管に通過させるようにして、前記圧縮機を通常運転よりも低い周波数で起動させ、前記室外ファンが起動可能な回転数であると判断すると、前記室外流量制御装置に冷媒を流出させるようにし、前記バイパス流量制御装置に冷媒を通過させないようにして、前記圧縮機を通常運転の周波数で駆動させることを特徴とする空気調和装置。 An air conditioner that configures a refrigerant circuit by pipe-connecting an outdoor unit and an indoor unit,
The outdoor unit is
A compressor that is driven with variable frequency and compresses and discharges the refrigerant;
A switching device for switching the flow path of the refrigerant;
An outdoor heat exchanger for exchanging heat between outdoor air and refrigerant;
An outdoor fan that is variably driven and allows the outdoor air to pass through the outdoor heat exchanger;
A rotational speed detection means for detecting the rotational speed of the outdoor fan;
An outdoor flow rate control device for controlling inflow and outflow of liquid refrigerant;
A bypass pipe connecting a discharge side pipe and a suction side pipe of the compressor;
A bypass flow rate control device for controlling passage of refrigerant in the bypass pipe;
When it is determined that the rotational speed related to detection by the rotational speed detection means when starting operation is equal to or higher than a predetermined rotational speed, the rotational speed at which the outdoor fan can be started based on the rotational direction and the operation mode of the outdoor fan, A controller for controlling to perform a preliminary operation until the outdoor fan is started and normal operation is started ,
The controller is
When it is determined that the operation mode is cooling operation and the rotation direction of the outdoor fan is reverse rotation that is opposite to the normal rotation direction of the outdoor fan, the refrigerant is prevented from flowing out to the outdoor flow rate control device, When the refrigerant is passed through the bypass pipe in the bypass flow control device, the compressor is started at a frequency lower than that of normal operation, and the outdoor flow control is performed when it is determined that the outdoor fan has a rotation speed that can be started. An air-conditioning apparatus , wherein the compressor is driven at a normal operation frequency so that the refrigerant flows out of the apparatus and the bypass flow rate control apparatus does not pass the refrigerant . 前記室内機は、
空調対象空間の空気と冷媒との熱交換を行う室内熱交換器と、
回転数可変に駆動し、前記室内熱交換器に前記空調対象空間の空気を通過させる室内ファンと、
前記室内熱交換器を通過する冷媒の流量を調整する冷媒流量調整装置と
を備え、
前記制御装置は、
前記室内ファンを通常よりも低い回転数で駆動させて前記室内熱交換器の冷媒を蒸発させるように制御することを特徴とする請求項１に記載の空気調和装置。 The indoor unit is
An indoor heat exchanger for exchanging heat between the air in the air-conditioned space and the refrigerant;
An indoor fan that is variably driven and allows the air in the air-conditioned space to pass through the indoor heat exchanger;
A refrigerant flow rate adjusting device for adjusting the flow rate of the refrigerant passing through the indoor heat exchanger,
The control device includes:
2. The air conditioner according to claim 1 , wherein the indoor fan is controlled to be driven at a lower rotational speed than normal so that the refrigerant of the indoor heat exchanger is evaporated. 室外機と室内機とを配管接続して冷媒回路を構成する空気調和装置であって、
前記室外機は、
周波数可変に駆動し、冷媒を圧縮して吐出する圧縮機と、
冷媒の流路切替を行うための切替装置と、
屋外の空気と冷媒との熱交換を行う室外熱交換器と、
回転数可変に駆動し、前記室外熱交換器に前記屋外の空気を通過させる室外ファンと、
該室外ファンの回転数を検知する回転数検知手段と、
運転を開始するときの前記回転数検知手段の検知に係る回転数が所定回転数以上であると判断すると、前記室外ファンの回転方向及び運転モードに基づき、前記室外ファンが起動可能な回転数となって前記室外ファンを起動させて通常運転の動作を開始するまで、予備動作を行うように制御する制御装置と
を備え、
前記制御装置は、
前記運転モードが冷房運転であり、前記室外ファンの回転方向が前記室外ファンの通常回転方向である正回転であると判断すると、前記室外熱交換器の凝縮器としての能力に基づいて、前記圧縮機の最大周波数制限値及び運転させる前記室内機を決定することを特徴とする空気調和装置。 An air conditioner that configures a refrigerant circuit by pipe-connecting an outdoor unit and an indoor unit,
The outdoor unit is
A compressor that is driven with variable frequency and compresses and discharges the refrigerant;
A switching device for switching the flow path of the refrigerant;
An outdoor heat exchanger for exchanging heat between outdoor air and refrigerant;
An outdoor fan that is variably driven and allows the outdoor air to pass through the outdoor heat exchanger;
A rotational speed detection means for detecting the rotational speed of the outdoor fan;
When it is determined that the rotational speed related to detection by the rotational speed detection means when starting operation is equal to or higher than a predetermined rotational speed, the rotational speed at which the outdoor fan can be started based on the rotational direction and the operation mode of the outdoor fan, A control device that controls to perform a preliminary operation until the outdoor fan is started and the normal operation starts.
With
The control device includes:
When it is determined that the operation mode is a cooling operation and the rotation direction of the outdoor fan is a normal rotation that is the normal rotation direction of the outdoor fan, the compression is performed based on the capacity of the outdoor heat exchanger as a condenser. air conditioner you and determines a maximum frequency limits of the machine and the indoor unit to be operated. 室外機と室内機とを配管接続して冷媒回路を構成する空気調和装置であって、
前記室外機は、
周波数可変に駆動し、冷媒を圧縮して吐出する圧縮機と、
冷媒の流路切替を行うための切替装置と、
屋外の空気と冷媒との熱交換を行う室外熱交換器と、
回転数可変に駆動し、前記室外熱交換器に前記屋外の空気を通過させる室外ファンと、
該室外ファンの回転数を検知する回転数検知手段と、
運転を開始するときの前記回転数検知手段の検知に係る回転数が所定回転数以上であると判断すると、前記室外ファンの回転方向及び運転モードに基づき、前記室外ファンが起動可能な回転数となって前記室外ファンを起動させて通常運転の動作を開始するまで、予備動作を行うように制御する制御装置と
を備え、
前記制御装置は、
前記運転モードが暖房運転であり、前記室外ファンの回転方向が前記室外ファンの通常回転方向である正回転であると判断すると、前記室外熱交換器の蒸発器としての能力に基づいて、前記圧縮機の最大周波数制限値及び運転させる前記室内機を決定することを特徴とする空気調和装置。 An air conditioner that configures a refrigerant circuit by pipe-connecting an outdoor unit and an indoor unit,
The outdoor unit is
A compressor that is driven with variable frequency and compresses and discharges the refrigerant;
A switching device for switching the flow path of the refrigerant;
An outdoor heat exchanger for exchanging heat between outdoor air and refrigerant;
An outdoor fan that is variably driven and allows the outdoor air to pass through the outdoor heat exchanger;
A rotational speed detection means for detecting the rotational speed of the outdoor fan;
When it is determined that the rotational speed related to detection by the rotational speed detection means when starting operation is equal to or higher than a predetermined rotational speed, the rotational speed at which the outdoor fan can be started based on the rotational direction and the operation mode of the outdoor fan, A control device that controls to perform a preliminary operation until the outdoor fan is started and the normal operation starts.
With
The control device includes:
When it is determined that the operation mode is heating operation and the rotation direction of the outdoor fan is normal rotation that is the normal rotation direction of the outdoor fan, the compression is performed based on the capability of the outdoor heat exchanger as an evaporator. air conditioner you and determines a maximum frequency limits of the machine and the indoor unit to be operated. 前記室内機は、
室内熱交換器に流入する空気の温度を検知する温度検知手段と、
空調対象空間の温度を設定する温度設定手段と
をさらに備え、
前記制御装置は、前記温度検知手段の検知に係る温度と前記温度設定手段の設定に係る温度との差が大きい前記室内機を優先して動作させることを特徴とする請求項３又は４に記載の空気調和装置。 The indoor unit is
Temperature detecting means for detecting the temperature of the air flowing into the indoor heat exchanger;
Temperature setting means for setting the temperature of the air conditioning target space,
The control device according to claim 3 or 4, characterized in that to operate giving priority to the indoor unit having a large difference between the temperature of the setting temperature and the temperature setting means according to the detection of said temperature detecting means Air conditioner. 室外機と室内機とを配管接続して冷媒回路を構成する空気調和装置であって、
前記室外機は、
周波数可変に駆動し、冷媒を圧縮して吐出する圧縮機と、
冷媒の流路切替を行うための切替装置と、
屋外の空気と冷媒との熱交換を行う室外熱交換器と、
回転数可変に駆動し、前記室外熱交換器に前記屋外の空気を通過させる室外ファンと、
該室外ファンの回転数を検知する回転数検知手段と、
前記圧縮機の吸入側において液状の冷媒を貯留するアキュームレータと、
運転を開始するときの前記回転数検知手段の検知に係る回転数が所定回転数以上であると判断すると、前記室外ファンの回転方向及び運転モードに基づき、前記室外ファンが起動可能な回転数となって前記室外ファンを起動させて通常運転の動作を開始するまで、予備動作を行うように制御する制御装置と
を備え、
前記室内機は、
空調対象空間の空気と冷媒との熱交換を行う室内熱交換器、回転数可変に駆動し、前記室内熱交換器に前記空調対象空間の空気を通過させる室内ファン及び前記室内熱交換器を通過する冷媒の流量を調整する冷媒流量調整装置を備え、
前記制御装置は、
前記室外ファンの回転方向が前記室外ファンの通常回転方向と逆方向である逆回転であり、前記運転モードが暖房運転であると判断すると、前記室内ファンを通常よりも低い回転数で駆動させて前記室内熱交換器の冷媒を凝縮させるように制御することを特徴とする空気調和装置。 An air conditioner that configures a refrigerant circuit by pipe-connecting an outdoor unit and an indoor unit,
The outdoor unit is
A compressor that is driven with variable frequency and compresses and discharges the refrigerant;
A switching device for switching the flow path of the refrigerant;
An outdoor heat exchanger for exchanging heat between outdoor air and refrigerant;
An outdoor fan that is variably driven and allows the outdoor air to pass through the outdoor heat exchanger;
A rotational speed detection means for detecting the rotational speed of the outdoor fan;
An accumulator for storing liquid refrigerant on the suction side of the compressor;
When it is determined that the rotational speed related to detection by the rotational speed detection means when starting operation is equal to or higher than a predetermined rotational speed, the rotational speed at which the outdoor fan can be started based on the rotational direction and the operation mode of the outdoor fan, A control device that controls to perform a preliminary operation until the outdoor fan is started and the normal operation starts.
With
The indoor unit is
An indoor heat exchanger for exchanging heat between the air in the air-conditioning target space and the refrigerant, passing through the indoor heat exchanger and the indoor heat exchanger that are driven at a variable speed and pass the air in the air-conditioning target space through the indoor heat exchanger A refrigerant flow rate adjusting device for adjusting the flow rate of the refrigerant to be
The control device includes:
When it is determined that the rotation direction of the outdoor fan is reverse rotation that is opposite to the normal rotation direction of the outdoor fan and the operation mode is heating operation, the indoor fan is driven at a lower rotation speed than normal. air conditioner you and controls so as to condense the refrigerant in the indoor heat exchanger.
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