JP6320617B2 - Air conditioner - Google Patents

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JP6320617B2
JP6320617B2 JP2017500209A JP2017500209A JP6320617B2 JP 6320617 B2 JP6320617 B2 JP 6320617B2 JP 2017500209 A JP2017500209 A JP 2017500209A JP 2017500209 A JP2017500209 A JP 2017500209A JP 6320617 B2 JP6320617 B2 JP 6320617B2
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control unit
air
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JPWO2016132496A1 (en
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遼太 福田
遼太 福田
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Mitsubishi Electric Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/30—Velocity
    • 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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Description

本発明は、運転中に初期の静風圧値から外れた際に、自動で所定の風量となるように送風機を制御することができる空気調和機に関するものである。   The present invention relates to an air conditioner that can automatically control a blower so as to have a predetermined air volume when it deviates from an initial static wind pressure value during operation.

従来の空気調和機では、ダクト接続を行う場合には、設備設計の段階であらかじめ必要な静圧と風量を計算して、それに見合うプーリとベルトを選定することで所定の静圧と風量を得ていた。しかし、空気調和機の運転中にフィルタ詰まりなどの風路圧損の変化が生じることがある。風路圧損の変化によって風量の変化が発生した場合に、従来では運転を停止して風路圧損の復元を行うあるいはプーリベルトの設定を変更することで所定の風量を維持していた。   In conventional air conditioners, when duct connections are made, the required static pressure and air volume are calculated in advance at the equipment design stage, and the pulleys and belts that match them are selected to obtain the predetermined static pressure and air volume. It was. However, changes in air path pressure loss such as filter clogging may occur during operation of the air conditioner. When a change in the air flow occurs due to a change in the air passage pressure loss, conventionally, the operation is stopped and the air passage pressure loss is restored or the setting of the pulley belt is changed to maintain the predetermined air flow.

従来の空気調和機では、ダクトを介して空気調和した空気を搬送する形態の場合に、あらかじめダクトの風路圧損によって減少する風量を見積もり、所定の風量に上乗せすることで、ダクト出口にて所定風量となるように初期の風量を設定していた。
しかし、上述のように運転中に風路圧損の増減が生じた場合は所定の風量を維持することができない。そのため、ダクトにダンパーを設置して所定の風量へ調整することもある。上述の手法では、所要風量が減少しても送風機の動力負荷はほとんど変化しないため、エネルギーのロスが発生する。In a conventional air conditioner, when air conditioned air is conveyed through a duct, the air volume that is reduced due to the wind path pressure loss of the duct is estimated in advance, and added to the predetermined air volume, so that a predetermined amount is obtained at the duct outlet. The initial air volume was set to be the air volume.
However, as described above, when the increase or decrease in the wind path pressure loss occurs during operation, the predetermined air volume cannot be maintained. Therefore, a damper may be installed in the duct to adjust to a predetermined air volume. In the above-described method, even if the required air volume decreases, the power load of the blower hardly changes, so that energy loss occurs.

そこで、定風量システムにおいてバイパスダンパを用い、ダクト出口静圧によって送風機の回転数を制御する手法が示されている（例えば、特許文献１参照）。   In view of this, a technique has been shown in which a bypass damper is used in a constant air flow system, and the rotational speed of the blower is controlled by a duct outlet static pressure (for example, see Patent Document 1).

特開平８-１１００７９号公報JP-A-8-110079

しかしながら、静圧測定のための機器が必要であり、構成が複雑になるといった課題がある。また、単一のダクトに対して複数の室内機を接続する設置形態の場合に、それぞれの室内機が独立した制御となるため、全体の風量の調整と動力負荷の最適化とが困難である。   However, there is a problem that a device for measuring static pressure is required and the configuration becomes complicated. In addition, in the case of an installation configuration in which a plurality of indoor units are connected to a single duct, each indoor unit is controlled independently, making it difficult to adjust the overall air volume and optimize the power load. .

本発明は、上記課題を解決するためのものであり、単一のダクトに対して複数の室内機を接続する設置形態の場合に静圧および風量の測定を行うことなく全体の風量を効率よく制御する空気調和機を提供することを目的とする。   The present invention is for solving the above-described problems, and in the case of an installation configuration in which a plurality of indoor units are connected to a single duct, the entire air volume can be efficiently reduced without measuring static pressure and air volume. An object is to provide an air conditioner to be controlled.

本発明に係る空気調和機は、ファンおよび制御部をそれぞれ有する複数の室内機と、前記複数の室内機に接続され、当該複数の室内機によって調和された空気を送り出すダクトと、を備え、前記複数の室内機のうち１つを親機とし、他を子機とし、前記親機の制御部および前記子機の制御部は、それぞれ自機の送風量を求め、前記親機の制御部は、前記子機の送風量を取り込んで、自機を含む前記複数の室内機の全体の送風量を求め、前記全体の送風量が基準風量に対して過不足があるかどうかを判定し、過不足があると判定した場合には、自機を含む前記複数の室内機のうちで最も効率良く駆動可能な室内機のファンを選択し、前記ファンの回転数の変更を指令するものである。   An air conditioner according to the present invention includes a plurality of indoor units each having a fan and a control unit, and a duct connected to the plurality of indoor units and sending out air conditioned by the plurality of indoor units, One of the plurality of indoor units is a master unit, the other is a slave unit, and the control unit of the master unit and the control unit of the slave unit each determine the amount of air blown by the own unit, and the control unit of the master unit is , Taking in the blast volume of the slave unit, obtaining the overall blast volume of the plurality of indoor units including its own unit, determining whether the overall blast volume is excessive or insufficient with respect to the reference air volume, When it is determined that there is a shortage, the fan of the indoor unit that can be driven most efficiently among the plurality of indoor units including the own unit is selected, and a change in the rotation speed of the fan is commanded.

本発明に係る空気調和機によれば、全室内機のうちで最も効率良く駆動可能な室内機のファンを選択し、ファンの回転数の変更を指令することで、所定の風量に近づけるので、単一のダクトに対して複数の室内機を接続する設置形態の場合に静圧および風量の測定を行うことなく全体の風量を効率よく制御することができる。   According to the air conditioner according to the present invention, since the indoor unit fan that can be driven most efficiently among all the indoor units is selected and the rotation speed of the fan is instructed, it approaches the predetermined air volume. In the case of an installation configuration in which a plurality of indoor units are connected to a single duct, the entire air volume can be efficiently controlled without measuring the static pressure and the air volume.

本発明の実施の形態１に係る空気調和機の室内機の設置形態を説明する図である。It is a figure explaining the installation form of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和機の室内機の構成を説明する概略図である。It is the schematic explaining the structure of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置の概略構成を示す冷媒回路図である。It is a refrigerant circuit diagram which shows schematic structure of the air conditioning apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和機の室内機の試運転時のフローを示す図である。It is a figure which shows the flow at the time of the test run of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和機の親機の運転時のフローを示す図である。It is a figure which shows the flow at the time of the driving | operation of the main | base station of the air conditioner which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和機の子機の運転時のフローを示す図である。It is a figure which shows the flow at the time of the driving | operation of the subunit | mobile_unit of the air conditioner which concerns on Embodiment 1 of this invention.

以下、図面に基づいて本発明の実施の形態について説明する。
なお、各図において、同一の符号を付したものは、同一のまたはこれに相当するものであり、これは明細書の全文において共通している。
さらに、明細書全文に表れている構成要素の形態は、あくまで例示であってこれらの記載に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.
In addition, in each figure, what attached | subjected the same code | symbol is the same or it corresponds, and this is common in the whole text of a specification.
Furthermore, the form of the constituent elements appearing in the whole specification is merely an example, and is not limited to these descriptions.

実施の形態１．
図１は、本発明の実施の形態１に係る空気調和機１００の室内機１、２、３の設置形態を説明する図である。図１に示す空気調和機１００の室内機１、２、３を単一のダクト４に２台以上接続する。ここでは３台設置した場合を例として記述する。
ダクト４に対して室内機１、２、３を接続し、室内機１、２、３間を通信線５にて通信可能に接続する。通信線５は、有線や無線であってよい。この際、室内機１、２、３のうちの１つを親機として設定し、親機以外のその他の室内機を子機として設定する。ここでは、室内機１を親機とする。室内機２、３を子機とする。Embodiment 1 FIG.
FIG. 1 is a diagram illustrating an installation mode of indoor units 1, 2, and 3 of an air conditioner 100 according to Embodiment 1 of the present invention. Two or more indoor units 1, 2, and 3 of the air conditioner 100 shown in FIG. Here, a case where three units are installed will be described as an example.
The indoor units 1, 2, and 3 are connected to the duct 4, and the indoor units 1, 2, and 3 are communicably connected via the communication line 5. The communication line 5 may be wired or wireless. At this time, one of the indoor units 1, 2, and 3 is set as a master unit, and other indoor units other than the master unit are set as slave units. Here, the indoor unit 1 is assumed to be a master unit. The indoor units 2 and 3 are set as slave units.

図２は、本発明の実施の形態１に係る空気調和機１００の室内機１の構成を説明する概略図である。室内機１は、冷媒と室内空気とを熱交換する熱交換器６と、室内空気をダクト４に流出させるファン７と、ファン７に回転駆動力を付与するモータ８と、モータ８を制御するインバータ９と、インバータ９に制御指令を発するマイコン１０と、を備える。室内機２、３は、室内機１と同様な構成である。このため、室内機１のみの構成を説明する。   FIG. 2 is a schematic diagram illustrating the configuration of the indoor unit 1 of the air conditioner 100 according to Embodiment 1 of the present invention. The indoor unit 1 controls a heat exchanger 6 that exchanges heat between refrigerant and room air, a fan 7 that causes room air to flow out into the duct 4, a motor 8 that imparts rotational driving force to the fan 7, and the motor 8. An inverter 9 and a microcomputer 10 that issues a control command to the inverter 9 are provided. The indoor units 2 and 3 have the same configuration as the indoor unit 1. Therefore, the configuration of only the indoor unit 1 will be described.

空気調和機１００の室内機１は、熱交換器６によって空気を調和し、マイコン１０を備えたインバータ９で制御されるモータ８によってファン７を駆動し、室内機１外へと調和空気（室内空気）を吹き出す。
空気調和機１００の室内機１が備えるマイコン１０には、ファン７の回転数、風量、静圧、電流などのファン特性が記憶されている。
マイコン１０を搭載したインバータ９は、ファン７の回転数と電流を検知できる機構を備え、ファン７を駆動するモータ８への電流を変更することでファン７の回転数を変更できる。
室内機１、２、３のマイコン１０が通信線５によって相互に通信可能である。
室内機１が備えるマイコン１０は、空気調和機１００の親機の制御部を構成する。また、室内機２、３が備えるマイコン１０は、空気調和機１００の子機の制御部を構成する。The indoor unit 1 of the air conditioner 100 harmonizes the air by the heat exchanger 6, drives the fan 7 by the motor 8 controlled by the inverter 9 having the microcomputer 10, and conditioned air (outdoors) Blow out air).
The microcomputer 10 included in the indoor unit 1 of the air conditioner 100 stores fan characteristics such as the rotational speed of the fan 7, the air volume, the static pressure, and the current.
The inverter 9 equipped with the microcomputer 10 includes a mechanism that can detect the rotation speed and current of the fan 7, and can change the rotation speed of the fan 7 by changing the current to the motor 8 that drives the fan 7.
The microcomputers 10 of the indoor units 1, 2 and 3 can communicate with each other via the communication line 5.
The microcomputer 10 provided in the indoor unit 1 constitutes a control unit of the master unit of the air conditioner 100. Moreover, the microcomputer 10 with which the indoor units 2 and 3 are provided comprises the control part of the subunit | mobile_unit of the air conditioner 100. FIG.

図３は、本発明の実施の形態１に係る空気調和機１００の概略構成を示す冷媒回路図である。
次に、図３を参照して空気調和機１００の冷房運転時の動作例について説明する。マイコン１０によって四方弁１０３が冷房運転に切り替えられた場合には、冷媒が圧縮機１０１により圧縮されて高温高圧のガス冷媒となり、四方弁１０３を介して室外熱交換器１０４に流入する。室外熱交換器１０４に流入した高温高圧のガス冷媒は、室外熱交換器１０４を通過する室外空気と熱交換（放熱）され、高圧の液冷媒となって流出する。室外熱交換器１０４から流出した高圧の液冷媒は、毛細管１０５および電子制御式膨張弁１０６で減圧され、低圧の気液二相の冷媒となり、熱交換器６に流入する。熱交換器６に流入した気液二相の冷媒は、熱交換器６を通過する室内空気と熱交換され、室内空気を冷却して低温低圧のガス冷媒となって圧縮機１０１に吸入される。FIG. 3 is a refrigerant circuit diagram illustrating a schematic configuration of the air conditioner 100 according to Embodiment 1 of the present invention.
Next, an example of the operation of the air conditioner 100 during the cooling operation will be described with reference to FIG. When the microcomputer 10 switches the four-way valve 103 to the cooling operation, the refrigerant is compressed by the compressor 101 to become a high-temperature and high-pressure gas refrigerant, and flows into the outdoor heat exchanger 104 through the four-way valve 103. The high-temperature and high-pressure gas refrigerant that has flowed into the outdoor heat exchanger 104 undergoes heat exchange (heat radiation) with outdoor air that passes through the outdoor heat exchanger 104 and flows out as high-pressure liquid refrigerant. The high-pressure liquid refrigerant that has flowed out of the outdoor heat exchanger 104 is depressurized by the capillary tube 105 and the electronically controlled expansion valve 106, becomes a low-pressure gas-liquid two-phase refrigerant, and flows into the heat exchanger 6. The gas-liquid two-phase refrigerant that has flowed into the heat exchanger 6 is heat-exchanged with the room air passing through the heat exchanger 6, cools the room air, and is sucked into the compressor 101 as a low-temperature and low-pressure gas refrigerant. .

次に、図３を参照して空気調和機１００の暖房運転時の動作例について説明する。マイコン１０によって四方弁１０３が暖房運転に切り替えられた場合には、冷媒は、上記と同様に圧縮機１０１により圧縮されて高温高圧のガス冷媒となり、四方弁１０３を介して熱交換器６に流入する。熱交換器６に流入した高温高圧のガス冷媒は、熱交換器６を通過する室内空気と熱交換され、室内空気を暖めて高圧の液冷媒となる。熱交換器６から流出した高圧の液冷媒は、電子制御式膨張弁１０６および毛細管１０５で減圧され、低圧の気液二相の冷媒となり、室外熱交換器１０４に流入する。室外熱交換器１０４に流入した低圧の気液二相の冷媒は、室外熱交換器１０４を通過する室外空気と熱交換され、低温低圧のガス冷媒となって圧縮機１０１に吸入される。   Next, an example of the operation of the air conditioner 100 during the heating operation will be described with reference to FIG. When the four-way valve 103 is switched to the heating operation by the microcomputer 10, the refrigerant is compressed by the compressor 101 in the same manner as described above to become a high-temperature and high-pressure gas refrigerant and flows into the heat exchanger 6 through the four-way valve 103. To do. The high-temperature and high-pressure gas refrigerant that has flowed into the heat exchanger 6 is heat-exchanged with the room air that passes through the heat exchanger 6, and warms the room air to become a high-pressure liquid refrigerant. The high-pressure liquid refrigerant that has flowed out of the heat exchanger 6 is depressurized by the electronic control type expansion valve 106 and the capillary tube 105, becomes a low-pressure gas-liquid two-phase refrigerant, and flows into the outdoor heat exchanger 104. The low-pressure gas-liquid two-phase refrigerant that has flowed into the outdoor heat exchanger 104 is heat-exchanged with outdoor air that passes through the outdoor heat exchanger 104 and is sucked into the compressor 101 as a low-temperature and low-pressure gas refrigerant.

次に、実施の形態１に係る空気調和機１００のダクト４の風量を制御する動作について説明する。
図４は、本発明の実施の形態１に係る空気調和機１００の室内機１、２、３の試運転時のフローを示す図である。
まず、図４を用いて空気調和機１００の室内機１、２、３の試運転時の制御フローを説明する。Next, the operation | movement which controls the air volume of the duct 4 of the air conditioner 100 which concerns on Embodiment 1 is demonstrated.
FIG. 4 is a diagram showing a flow during a trial operation of the indoor units 1, 2, and 3 of the air conditioner 100 according to Embodiment 1 of the present invention.
First, the control flow at the time of trial operation of the indoor units 1, 2, and 3 of the air conditioner 100 will be described with reference to FIG.

ステップＳ１として、各室内機１、２、３のマイコン１０は、施工時などの試運転時にダクト４の風量が一定化する所定の風量Ｑ０にて運転し、その時のファン７の電流値Ａ０と回転数Ｎ０をマイコン１０に記憶しておく。   As step S1, the microcomputer 10 of each indoor unit 1, 2, 3 operates at a predetermined air volume Q0 in which the air volume of the duct 4 is constant during a trial operation such as construction, and the current value A0 of the fan 7 and rotation at that time The number N0 is stored in the microcomputer 10.

図５は、本発明の実施の形態１に係る空気調和機１００の親機の運転時のフローを示す図である。
次に、図５を用いて空気調和機１００の室内機１に設定された親機の運転時の親機制御フローを説明する。FIG. 5 is a diagram showing a flow during operation of the master unit of the air-conditioning apparatus 100 according to Embodiment 1 of the present invention.
Next, the master unit control flow during operation of the master unit set in the indoor unit 1 of the air conditioner 100 will be described with reference to FIG.

ステップＳＴ１として、親機のマイコン１０は、運転開始中に親機から子機に対して送風量Ｑの計算指令を通信線５により送信する。また、親機も送風量Ｑの計算をする。送風量Ｑは、運転電流値Ａと運転回転数Ｎとを計測し、マイコン１０に記憶された関係を用いて計算される。
ステップＳＴ２では、親機のマイコン１０は、子機の送風量Ｑのデータを通信線５により受信する。
ステップＳＴ３では、親機のマイコン１０は、子機からの送風量Ｑの情報を通信線５により受信すると、ダクト４を一定風量にする所定の風量Ｑ０（基準風量）と全室内機１、２、３の送風量Ｑの総和（全体の送風量）とから送風過不足量ΔＱを計算する。
ステップＳＴ４では、親機のマイコン１０は、送風過不足量ΔＱが存在するか否かを判別する。ステップＳＴ４で送風過不足量ΔＱが存在する場合（ＹＥＳ）には、ステップＳＴ５に移行する。送風過不足量ΔＱが存在しない場合（ＮＯ）には、ステップＳＴ１に移行する。As step ST <b> 1, the microcomputer 10 of the parent device transmits a calculation command for the air flow rate Q from the parent device to the child device through the communication line 5 during the start of operation. The master unit also calculates the air flow rate Q. The air flow rate Q is calculated by measuring the operating current value A and the operating rotational speed N and using the relationship stored in the microcomputer 10.
In step ST <b> 2, the microcomputer 10 of the parent device receives the data of the blowing amount Q of the child device through the communication line 5.
In step ST3, when the microcomputer 10 of the master unit receives the information on the air flow rate Q from the slave unit via the communication line 5, the predetermined air volume Q0 (reference air volume) that makes the duct 4 a constant air volume and all the indoor units 1 and 2 are set. 3 is calculated from the sum of the airflow rates Q of 3 (the overall airflow rate).
In step ST4, the microcomputer 10 of the master unit determines whether or not there is an excess / shortage amount ΔQ of the air flow. If the excess air shortage amount ΔQ exists in step ST4 (YES), the process proceeds to step ST5. When there is no excess air shortage ΔQ (NO), the process proceeds to step ST1.

ステップＳＴ５では、親機のマイコン１０は、送風過不足量ΔＱだけ送風量を変化させた際の電流値Ａ１と現在の電流値Ａとの変化量ΔＡを計算する指令を子機に通信線５により送信する。また、親機も変化量ΔＡを計算する。
ステップＳＴ６では、親機のマイコン１０は、変化量ΔＡを子機から通信線５により受信する。
ステップＳＴ７では、親機のマイコン１０は、通信線５により送信されてきた各子機の変化量ΔＡおよび親機の変化量ΔＡを比較する。
ステップＳＴ８では、親機のマイコン１０は、変化量ΔＡによって送風過不足量ΔＱだけの送風量を充足させる最も効率良く駆動可能な（電流量が最も効率的に変更させられる）室内機に対して変化量ΔＡの変化分だけファン７の回転数Ｎを変更させる指令を通信線５により送信する。
ここで、変化量ΔＡによって最も効率良く駆動可能とは、送風過不足量ΔＱが不足の場合には風量を増量するため変化量ΔＡが最小値の室内機にてΔＡだけ電流値を増加させ、全体の電流量の増加を最少に抑えることをいう。また、送風過不足量ΔＱが過剰の場合には風量を減少するため変化量ΔＡが最大値の室内機にて変化量ΔＡだけ電流値を減少させ、全体の電流量の減少を最大にすることをいう。これにより、電流量を最も効率よく変更する。In step ST5, the microcomputer 10 of the master unit sends a command to the slave unit to calculate the change amount ΔA between the current value A1 and the current value A when the blower amount is changed by the excess or shortage amount ΔQ. Send by. The master unit also calculates the change amount ΔA.
In step ST <b> 6, the microcomputer 10 of the parent device receives the change amount ΔA from the child device via the communication line 5.
In step ST7, the microcomputer 10 of the parent device compares the change amount ΔA of each child device transmitted through the communication line 5 with the change amount ΔA of the parent device.
In step ST8, the microcomputer 10 of the master unit performs the most efficient driving (the amount of current can be changed most efficiently) for the indoor unit that satisfies the amount of ventilation excess / deficiency ΔQ by the change amount ΔA. A command for changing the rotational speed N of the fan 7 by the amount of change ΔA is transmitted through the communication line 5.
Here, the most efficient driving by the change amount ΔA means that when the excess air shortage amount ΔQ is insufficient, the air amount is increased to increase the current value by ΔA in the indoor unit having the minimum change amount ΔA, This refers to minimizing the increase in the total amount of current. In addition, when the air flow excess / deficiency ΔQ is excessive, the air flow is decreased, so that the current value is decreased by the change ΔA in the indoor unit having the maximum change ΔA, thereby maximizing the decrease in the total current. Say. Thereby, the amount of current is changed most efficiently.

ステップＳＴ９では、親機のマイコン１０は、ファン７の回転数Ｎを変更する指令があるか否かを判別する。ステップＳＴ９でファン７の回転数Ｎを変更する指令がある場合（ＹＥＳ）には、ステップＳＴ１０に移行する。ファン７の回転数Ｎを変更する指令が無い場合（ＮＯ）には、ステップＳＴ１に移行する。
ステップＳＴ１０では、親機のマイコン１０は、ファン７の回転数Ｎを変更する指令に従い、インバータ９を制御して変化量ΔＡの変化分だけファン７の回転数Ｎを変更する。ステップＳＴ１０からは、ステップＳＴ１に戻る。In step ST9, the microcomputer 10 of the parent device determines whether or not there is a command to change the rotational speed N of the fan 7. If there is a command to change the rotation speed N of the fan 7 in step ST9 (YES), the process proceeds to step ST10. If there is no command to change the rotational speed N of the fan 7 (NO), the process proceeds to step ST1.
In step ST10, the microcomputer 10 of the master unit changes the rotational speed N of the fan 7 by the amount of change of the change amount ΔA by controlling the inverter 9 in accordance with a command for changing the rotational speed N of the fan 7. From step ST10, the process returns to step ST1.

図６は、本発明の実施の形態１に係る空気調和機１００の子機の運転時のフローを示す図である。
図６を用いて空気調和機１００の室内機２、３の運転時の子機制御フローを説明する。FIG. 6 is a diagram showing a flow during operation of the slave unit of the air conditioner 100 according to Embodiment 1 of the present invention.
The subunit | mobile_unit control flow at the time of operation | movement of the indoor units 2 and 3 of the air conditioner 100 is demonstrated using FIG.

ステップＳＨ１では、子機のマイコン１０は、通常の運転開始後に親機からの情報発信指令（ステップＳＴ１の指令）を、通信線５を介して受信する。
ステップＳＨ２では、子機のマイコン１０は、室内機２、３に対して運転電流値Ａと運転回転数Ｎとを計測し、マイコン１０に記憶された関係を用いて送風量Ｑを計算する。
ステップＳＨ３では、子機のマイコン１０は、計算した送風量Ｑを親機へと通信線５により送信する。In step SH1, the microcomputer 10 of the slave unit receives an information transmission command (command of step ST1) from the master unit via the communication line 5 after the start of normal operation.
In step SH <b> 2, the microcomputer 10 of the slave unit measures the operating current value A and the operating rotational speed N for the indoor units 2 and 3, and calculates the air flow rate Q using the relationship stored in the microcomputer 10.
In step SH <b> 3, the microcomputer 10 of the child device transmits the calculated air flow rate Q to the parent device via the communication line 5.

ステップＳＨ４では、子機のマイコン１０は、通信線５を介して、所定の風量Ｑ０と全体の送風量Ｑから算出された送風過不足量ΔＱだけ送風量を変化させた際の電流値Ａ１と現在の電流値Ａとの変化量ΔＡを計算する指令（ステップＳＴ５の指令）があるか否かを判別する。ステップＳＨ４で変化量ΔＡを計算する指令がある場合（ＹＥＳ）には、ステップＳＨ５に移行する。変化量ΔＡを計算する指令が無い場合（ＮＯ）には、ステップＳＨ１に移行する。
ステップＳＨ５では、子機のマイコン１０は、変化量ΔＡを、送風過不足量ΔＱだけ送風量を変化させた際の電流値Ａ１と現在の電流値Ａとの差から計算する。
ステップＳＨ６では、子機のマイコン１０は、変化量ΔＡを親機に通信線５により送信する。In step SH4, the microcomputer 10 of the slave unit changes the current value A1 when the air flow rate is changed by the air flow excess / shortage amount ΔQ calculated from the predetermined air flow rate Q0 and the entire air flow rate Q via the communication line 5. It is determined whether or not there is a command (command in step ST5) for calculating the amount of change ΔA from the current value A. If there is a command to calculate the change amount ΔA in step SH4 (YES), the process proceeds to step SH5. If there is no command to calculate the change amount ΔA (NO), the process proceeds to step SH1.
In step SH5, the microcomputer 10 of the slave unit calculates the change amount ΔA from the difference between the current value A1 and the current value A when the air flow rate is changed by the air flow excess / deficiency amount ΔQ.
In step SH6, the microcomputer 10 of the child device transmits the change amount ΔA to the parent device via the communication line 5.

ステップＳＨ７では、子機のマイコン１０は、通信線５を介して、ファン７の回転数Ｎを変更する指令（ステップＳＴ８の指令）があるか否かを判別する。ステップＳＨ７でファン７の回転数Ｎを変更する指令がある場合（ＹＥＳ）には、ステップＳＨ８に移行する。ファン７の回転数Ｎを変更する指令が無い場合（ＮＯ）には、ステップＳＨ１に移行する。
ステップＳＨ８では、子機のマイコン１０は、通信線５を介したファン７の回転数Ｎを変更する指令に従い、インバータ９を制御して変化量ΔＡの変化分だけファン７の回転数Ｎを変更する。ステップＳＨ８からは、ステップＳＨ１に戻る。In step SH7, the microcomputer 10 of the slave unit determines whether or not there is a command for changing the rotational speed N of the fan 7 (command in step ST8) via the communication line 5. If there is a command to change the rotational speed N of the fan 7 in step SH7 (YES), the process proceeds to step SH8. If there is no command to change the rotational speed N of the fan 7 (NO), the process proceeds to step SH1.
In step SH8, the microcomputer 10 of the slave unit changes the rotational speed N of the fan 7 by the amount of change ΔA by controlling the inverter 9 in accordance with a command to change the rotational speed N of the fan 7 via the communication line 5. To do. From step SH8, the process returns to step SH1.

以上のように、図５、図６のフローが運転時に実行されることで、子機のマイコン１０は、親機のマイコン１０の指令に従い送風量Ｑを計算して親機のマイコン１０へと通信線５により送信する。子機のマイコン１０からの送風量Ｑを通信線５により受信した親機のマイコン１０は、所定の風量Ｑ０と全室内機１、２、３の全体の送風量Ｑとから送風過不足量ΔＱを計算する。
親機のマイコン１０が送風過不足量ΔＱが存在すると判断すると、通信線５を介して子機のマイコン１０に指令を出し、子機のマイコン１０に送風過不足量ΔＱだけ送風量を変化させた際の電流値Ａ１と現在の電流値Ａとの変化量ΔＡを計算させ、親機のマイコン１０に通信線５により送信させる。親機のマイコン１０でも変化量ΔＡを計算する。
親機のマイコン１０は、送信されてきた親機および各子機の変化量ΔＡを比較し、親機および子機の全室内機１、２、３のうち変化量ΔＡによって最も効率良く駆動可能な室内機に対してファン７の回転数Ｎを制御させる指令を通信線５により送信する。
指令を受信した室内機のマイコン１０は、変化量ΔＡの変化分だけファン７の回転数を変更する。これを繰り返すことで送風量Ｑを所定の風量Ｑ０へ調整することができる。As described above, the flow of FIG. 5 and FIG. 6 is executed during operation, so that the microcomputer 10 of the slave unit calculates the air flow rate Q in accordance with the command of the microcomputer 10 of the master unit and transfers it to the microcomputer 10 of the master unit. It transmits by the communication line 5. The microcomputer 10 of the master unit that has received the air flow rate Q from the microcomputer 10 of the slave unit via the communication line 5 uses the air flow excess / shortage amount ΔQ from the predetermined air volume Q0 and the total air volume Q of all the indoor units 1, 2, and 3. Calculate
If the microcomputer 10 of the master unit determines that there is an excess / shortage amount ΔQ of the blower, it issues a command to the microcomputer 10 of the slave unit via the communication line 5 to change the blower amount by the excess / shortage amount ΔQ of the slave unit. The amount of change ΔA between the current value A1 and the current value A is calculated and transmitted to the microcomputer 10 of the parent machine via the communication line 5. The change amount ΔA is also calculated by the microcomputer 10 of the parent machine.
The microcomputer 10 of the master unit compares the transmitted change ΔA of the master unit and each slave unit, and can be driven most efficiently by the change amount ΔA of all indoor units 1, 2, and 3 of the master unit and the slave units. A command to control the rotational speed N of the fan 7 is transmitted through the communication line 5 to a simple indoor unit.
The microcomputer 10 of the indoor unit that has received the command changes the rotational speed of the fan 7 by the change amount of the change amount ΔA. By repeating this, the air flow rate Q can be adjusted to a predetermined air flow rate Q0.

実施の形態１によれば、運転中にフィルタ詰まりなどの風路圧損の増減が発生しても所定の風量Ｑ０（設定値）となるように全体の送風量Ｑを調整することができる。また、複数の室内機の間で運転中の室内機１、２、３の情報を通信し、親機のマイコン１０が全室内機のうち変化量ΔＡによって最も効率良く駆動可能な室内機に対してファン７の回転数Ｎの変更を指令することで、電流値が効率的に変更されて所定の風量Ｑ０（設定値）に近づけ、単一のダクト４に対して複数の室内機１、２、３を接続する設置形態の場合に、静圧および風量の測定を行うことなく全体の風量を効率よく制御することができる。また、親機が子機に指令を発信して総合制御するので、複数の室内機１、２、３全体での風量の調整と動力負荷の最適化とを達成することができる。   According to the first embodiment, it is possible to adjust the entire air flow rate Q so that the air flow rate Q0 (set value) becomes a predetermined air flow amount even if an increase or decrease in air path pressure loss such as filter clogging occurs during operation. Moreover, the information of the indoor units 1, 2, and 3 in operation is communicated among a plurality of indoor units, and the microcomputer 10 of the master unit is the most efficient indoor unit that can be driven by the change amount ΔA among all the indoor units. By instructing the change of the rotational speed N of the fan 7, the current value is efficiently changed to approach a predetermined air volume Q 0 (set value), and a plurality of indoor units 1, 2 for a single duct 4. 3 can be efficiently controlled without measuring static pressure and air volume. Further, since the master unit transmits a command to the slave unit and performs overall control, it is possible to achieve adjustment of the air volume and optimization of the power load in the plurality of indoor units 1, 2, and 3 as a whole.

また、電流の変化量ΔＡによって最も効率良く駆動可能な室内機に対してのみ電流の変化量ΔＡの変化分だけファン７の回転数を変更するので、電流値の変化が最も少なく増加するか最も多く減少するように電流値が効率的に変更されて所定の風量Ｑ０（設定値）に近づけることができる。   Further, since the number of rotations of the fan 7 is changed by the change amount of the current change amount ΔA only for the indoor unit that can be driven most efficiently by the current change amount ΔA, the change in the current value is the least increased. The current value is efficiently changed so as to decrease a lot, and can be brought close to a predetermined air volume Q0 (set value).

以上の実施の形態１によれば、親機のマイコン１０は、過不足があると判定した場合には、自機を含む複数の室内機１、２、３のうちで最も効率良く駆動可能な室内機のファン７を選択し、ファン７の回転数の変更を指令する。これによると、最も効率良く駆動可能な室内機のファン７の回転数が変更されることで、所定の風量Ｑ０（設定値）に近づけ、単一のダクト４に対して複数の室内機１、２、３を接続する設置形態の場合に、静圧および風量の測定を行うことなく全体の風量を効率よく制御することができる。   According to the first embodiment described above, when it is determined that there is an excess or deficiency, the microcomputer 10 of the parent device can be driven most efficiently among the plurality of indoor units 1, 2, and 3 including the own device. The fan 7 of the indoor unit is selected, and the change of the rotation speed of the fan 7 is instructed. According to this, by changing the rotation speed of the fan 7 of the indoor unit that can be driven most efficiently, it approaches the predetermined air volume Q0 (set value), and a plurality of indoor units 1, In the case of the installation configuration in which two or three are connected, the entire air volume can be efficiently controlled without measuring the static pressure and the air volume.

子機のマイコン１０は、親機のマイコン１０からの指令に基づいて自機の送風量Ｑを求めて親機のマイコン１０に送信する。これによると、親機のマイコン１０による総合制御を実現することができ、複数の室内機１、２、３全体での風量の調整と動力負荷の最適化を達成することができる。   The microcomputer 10 of the slave unit obtains the air flow rate Q of its own unit based on a command from the microcomputer 10 of the master unit and transmits it to the microcomputer 10 of the master unit. According to this, comprehensive control by the microcomputer 10 of the master unit can be realized, and adjustment of the air volume and optimization of the power load in the plurality of indoor units 1, 2, and 3 can be achieved.

親機のマイコン１０は、子機の電流の変化量ΔＡを取得し、自機を含む複数の室内機１、２、３の電流の変化量ΔＡに基づいて、最も効率良く駆動可能な室内機のファン７を選択し、過不足分の風量を充足するように、ファン７の回転数の変更を指令する。これによると、電流値が効率的に変更されて所定の風量Ｑ０（設定値）に近づけ、単一のダクト４に対して複数の室内機１、２、３を接続する設置形態の場合に、静圧および風量の測定を行うことなく全体の風量を効率よく制御することができる。   The microcomputer 10 of the master unit acquires the change amount ΔA of the current of the slave unit, and is the indoor unit that can be driven most efficiently based on the change amount ΔA of the current of the plurality of indoor units 1, 2, and 3 including its own unit The fan 7 is selected, and a change in the rotational speed of the fan 7 is commanded so as to satisfy the excess / deficiency air volume. According to this, in the case of the installation form in which the current value is efficiently changed to approach a predetermined air volume Q0 (set value) and a plurality of indoor units 1, 2, and 3 are connected to a single duct 4, The entire air volume can be controlled efficiently without measuring the static pressure and the air volume.

親機のマイコン１０は、子機の電流の変化量ΔＡを取得し、自機を含む複数の室内機１、２、３の電流の変化量ΔＡのうち、最も小さい電流の変化量ΔＡである室内機を最も効率良く駆動可能な室内機のファンとして選択し、不足分の風量を充足するように、ファン７の回転数の増加を指令する。これによると、電流値が効率良く必要最小限増加して所定の風量Ｑ０（設定値）に近づけ、単一のダクト４に対して複数の室内機１、２、３を接続する設置形態の場合に、静圧および風量の測定を行うことなく全体の風量を効率よく制御することができる。   The microcomputer 10 of the master unit obtains the change amount ΔA of the current of the slave unit, and is the smallest change amount ΔA of the current among the change amounts ΔA of the plurality of indoor units 1, 2, and 3 including the self unit. The indoor unit is selected as the fan of the indoor unit that can be driven most efficiently, and an increase in the number of rotations of the fan 7 is commanded so as to satisfy the insufficient air volume. According to this, in the case of an installation configuration in which a plurality of indoor units 1, 2, 3 are connected to a single duct 4 while the current value efficiently increases to the minimum necessary and approaches the predetermined air volume Q 0 (set value). In addition, the entire air volume can be efficiently controlled without measuring the static pressure and the air volume.

子機のマイコン１０は、親機のマイコン１０からの指令に基づいて自機の電流の変化量ΔＡを求めて親機のマイコン１０に送信する。これによると、親機のマイコン１０による総合制御を実現することができ、複数の室内機１、２、３全体での風量の調整と動力負荷の最適化とを達成することができる。   The microcomputer 10 of the slave unit obtains a change amount ΔA of the current of its own unit based on a command from the microcomputer 10 of the master unit and transmits it to the microcomputer 10 of the master unit. According to this, comprehensive control by the microcomputer 10 of the master unit can be realized, and adjustment of the air volume and optimization of the power load in the plurality of indoor units 1, 2, and 3 can be achieved.

１ 室内機、２ 室内機、３ 室内機、４ ダクト、５ 通信線、６ 熱交換器、７ ファン、８ モータ、９ インバータ、１０ マイコン、１００ 空気調和機、１０１ 圧縮機、１０３ 四方弁、１０４ 室外熱交換器、１０５ 毛細管、１０６ 電子制御式膨張弁。   DESCRIPTION OF SYMBOLS 1 Indoor unit, 2 Indoor unit, 3 Indoor unit, 4 Duct, 5 Communication line, 6 Heat exchanger, 7 Fan, 8 Motor, 9 Inverter, 10 Microcomputer, 100 Air conditioner, 101 Compressor, 103 Four-way valve, 104 Outdoor heat exchanger, 105 capillary tube, 106 electronically controlled expansion valve.

Claims (5)

ファンおよび制御部をそれぞれ有する複数の室内機と、
前記複数の室内機に接続され、当該複数の室内機によって調和された空気を送り出すダクトと、
を備え、
前記複数の室内機のうち１つを親機とし、他を子機とし、
前記親機の制御部および前記子機の制御部は、それぞれ自機の送風量を求め、
前記親機の制御部は、
前記子機の送風量を取り込んで、自機を含む前記複数の室内機の全体の送風量を求め、前記全体の送風量が基準風量に対して過不足があるかどうかを判定し、
過不足があると判定した場合には、自機を含む前記複数の室内機のうちで最も効率良く駆動可能な室内機のファンを選択し、前記ファンの回転数の変更を指令する
空気調和機。A plurality of indoor units each having a fan and a control unit;
A duct connected to the plurality of indoor units and for sending out air conditioned by the plurality of indoor units;
With
One of the plurality of indoor units is a master unit, the other is a slave unit,
The control unit of the master unit and the control unit of the slave unit respectively obtain the air volume of the own unit,
The control unit of the master unit is
Taking in the blast volume of the slave unit, obtaining the overall blast volume of the plurality of indoor units including the self unit, determining whether the overall blast volume is excessive or insufficient with respect to the reference air volume,
When it is determined that there is an excess or deficiency, an air conditioner that selects an indoor unit fan that can be driven most efficiently among the plurality of indoor units including the own unit and commands a change in the rotation speed of the fan. . 前記子機の制御部は、前記親機の制御部からの指令に基づいて自機の送風量を求めて親機の制御部に送信する
請求項１に記載の空気調和機。2. The air conditioner according to claim 1, wherein the control unit of the slave unit obtains an amount of air blown from the base unit based on a command from the control unit of the base unit, and transmits the amount to the control unit of the base unit. 前記親機の制御部が、前記全体の送風量が基準風量に対して過不足であると判定した場合には、
前記親機の制御部および前記子機の制御部は、それぞれ自機において過不足分の風量を変化させたときの電流の変化量を求め、
前記親機の制御部は、前記子機の電流の変化量を取得し、自機を含む前記複数の室内機の前記電流の変化量に基づいて、最も効率良く駆動可能な室内機のファンを選択し、前記過不足分の風量を充足するように、前記ファンの回転数の変更を指令する
請求項１または２に記載の空気調和機。When the control unit of the master unit determines that the overall air flow rate is excessive or insufficient with respect to the reference air flow rate,
The control unit of the master unit and the control unit of the slave unit each determine the amount of change in current when the air volume for excess and deficiency is changed in the own machine,
The control unit of the master unit obtains the amount of change in current of the slave unit, and determines the fan of the indoor unit that can be driven most efficiently based on the amount of change in current of the plurality of indoor units including its own unit. The air conditioner according to claim 1 or 2, wherein the air conditioner is selected and commanded to change the rotational speed of the fan so as to satisfy the excess / deficiency air volume. 前記親機の制御部が、前記全体の送風量が基準風量に対して不足であると判定した場合には、
前記親機の制御部および前記子機の制御部は、それぞれ自機において不足分の風量を増加させたときの電流の変化量を求め、
前記親機の制御部は、前記子機の電流の変化量を取得し、自機を含む前記複数の室内機の前記電流の変化量のうち、最も小さい電流の変化量である室内機を最も効率良く駆動可能な室内機のファンとして選択し、前記不足分の風量を充足するように、前記ファンの回転数の増加を指令する
請求項１または２に記載の空気調和機。When the control unit of the base unit determines that the overall air flow rate is insufficient with respect to the reference air flow rate,
The control unit of the master unit and the control unit of the slave unit respectively determine the amount of change in current when increasing the air volume of the shortage in the own unit,
The control unit of the master unit acquires the amount of change in the current of the slave unit, and selects the indoor unit having the smallest current change amount among the amount of change in the current of the plurality of indoor units including the self unit. 3. The air conditioner according to claim 1, wherein the air conditioner is selected as an indoor unit fan that can be driven efficiently, and commands to increase the rotational speed of the fan so as to satisfy the insufficient air volume. 前記子機の制御部は、前記親機の制御部からの指令に基づいて自機の電流の変化量を求めて親機の制御部に送信する
請求項３または４に記載の空気調和機。The air conditioner according to claim 3 or 4, wherein the control unit of the slave unit calculates a change amount of the current of the own unit based on a command from the control unit of the master unit and transmits the change amount to the control unit of the master unit.
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