JP5169305B2 - Air conditioner - Google Patents
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- JP5169305B2 JP5169305B2 JP2008044209A JP2008044209A JP5169305B2 JP 5169305 B2 JP5169305 B2 JP 5169305B2 JP 2008044209 A JP2008044209 A JP 2008044209A JP 2008044209 A JP2008044209 A JP 2008044209A JP 5169305 B2 JP5169305 B2 JP 5169305B2
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Description
本発明は最大暖房能力を向上させる空気調和機に関するものである。 The present invention relates to an air conditioner that improves the maximum heating capacity.
従来、最大暖房能力を向上させる空気調和機として、図4に示すように圧縮機駆動用ブラシレスDCモータの電流の位相を進み方向にずらせることにより、モータのロータ磁束をモータコイルで発生する磁束で弱め、最高回転数を上昇させて、最大暖房能力を増加させるようにしたものがある(例えば、特許文献1参照)。
しかしながら、上記従来の構成では、運転状況が変化してもモータ電流位相の進み度合いを変えていないため、最大負荷での高電流運転時にインバータ回路の電流値と室外機の運転電流値が許容範囲に収まるようにモータ電流位相の進み幅を抑える必要があり、その結果、最大暖房能力の増加も少なくなるという課題を有していた。 However, in the above conventional configuration, the degree of advancement of the motor current phase is not changed even when the operating condition changes, so that the current value of the inverter circuit and the operating current value of the outdoor unit are within an allowable range during high current operation at the maximum load. Therefore, it has been necessary to suppress the advance width of the motor current phase so as to be within the range, and as a result, the increase in the maximum heating capacity is reduced.
本発明は上記従来の課題を解決するもので、高負荷運転でのインバータ回路の電流値と室外機の運転電流値を許容範囲に収め、低負荷運転ではモータの回転数を最大限まで高くすることにより、最大暖房能力を大幅に向上させることができる空気調和機を提供することを目的とする。 The present invention solves the above-described conventional problems, and keeps the current value of the inverter circuit and the operation current value of the outdoor unit in a high load operation within an allowable range, and increases the rotation speed of the motor to the maximum in a low load operation. Thus, an object of the present invention is to provide an air conditioner that can greatly improve the maximum heating capacity.
前記従来の課題を解決するために、本発明の空気調和機は、ブラシレスDCモータの回転数と前記モータの運転電流に基づきモータの電流位相を制御することによって、高負荷運転でのインバータ回路の電流値を許容範囲に収め、低負荷運転ではモータの回転数を最大限まで高くすることにより、最大暖房能力を大幅に向上させるものである。 In order to solve the above-described conventional problems, an air conditioner according to the present invention controls the current phase of a motor based on the rotational speed of a brushless DC motor and the operating current of the motor, so The maximum heating capacity is greatly improved by keeping the current value within an allowable range and by increasing the rotational speed of the motor to the maximum during low load operation.
また、本発明の空気調和機は、ブラシレスDCモータの回転数と空気調和機の運転電流に基づきモータの電流位相を制御することによって、高負荷運転での室外機の運転電流値を許容範囲に収め、低負荷運転ではモータの回転数を最大限まで高くすることにより、最大暖房能力を大幅に向上させるものである。 Further, the air conditioner of the present invention controls the current phase of the motor based on the rotation speed of the brushless DC motor and the operating current of the air conditioner, so that the operating current value of the outdoor unit in the high load operation is within an allowable range. In the low load operation, the maximum heating capacity is greatly improved by increasing the rotational speed of the motor to the maximum.
また、本発明の空気調和機は、ブラシレスDCモータの回転数が所定の目標回転数に到達していない場合、前記モータの電流位相を電圧に対して進めることによりモータの回転数を最大限まで高くし最大暖房能力を大幅に向上させるものである。 In addition, the air conditioner of the present invention maximizes the rotational speed of the motor by advancing the current phase of the motor with respect to the voltage when the rotational speed of the brushless DC motor has not reached the predetermined target rotational speed. Increase the maximum heating capacity significantly.
本発明の空気調和機は高負荷運転と低負荷運転時のモータの電流位相を変化させ、負荷に応じた電流位相の制御を行うことができる。 The air conditioner of the present invention can control the current phase according to the load by changing the current phase of the motor during high load operation and low load operation.
第1の発明は、回転数可変のブラシレスDCモータで駆動される圧縮機と、前記モータを駆動するインバータ回路と、インバータ回路を制御する制御回路を備えた室外機において、前記モータの回転数と前記モータの運転電流に基づき前記モータの電流位相を制御し、前記モータの電流値が所定値を超えた場合は前記モータの電流位相の最大値を所定値以下に制御することにより、高負荷運転と低負荷運転時のモータの電流位相を変化させ、負荷に応じた電流位相の制御を行い、モータ電流を常にインバータ回路の許容範囲に収めることができる。 A first aspect of the present invention is an outdoor unit including a compressor driven by a brushless DC motor having a variable rotation speed, an inverter circuit that drives the motor, and a control circuit that controls the inverter circuit. By controlling the current phase of the motor based on the operating current of the motor, and when the current value of the motor exceeds a predetermined value, the maximum value of the current phase of the motor is controlled to be equal to or lower than the predetermined value, thereby operating at a high load. and varying the motor current phase of the low load operation, have row control current phase in accordance with the load, it can be kept in the allowable range of constantly inverter circuit of the motor current.
第2の発明は、回転数可変のブラシレスDCモータで駆動される圧縮機と、前記モータを駆動するインバータ回路と、インバータ回路を制御する制御回路を備えた空気調和機において、前記モータの回転数と前記空気調和機の運転電流に基づき前記モータの電流位相を制御し、前記空気調和機の運転電流が所定値を超えた場合は前記モータの電流位相の最大値を所定値以下に制御することにより、高負荷運転と低負荷運転時のモータの電流位相を変化させ、負荷に応じた電流位相の制御を行い、室外機の運転電流を常に許容範囲に収めることができる。 According to a second aspect of the present invention, there is provided an air conditioner including a compressor driven by a brushless DC motor having a variable rotation speed, an inverter circuit for driving the motor, and a control circuit for controlling the inverter circuit. And controlling the current phase of the motor based on the operating current of the air conditioner, and if the operating current of the air conditioner exceeds a predetermined value, the maximum value of the current phase of the motor is controlled to a predetermined value or less. Accordingly, by changing the high-load operation and low load operation of a motor current phase, have row control current phase in accordance with the load, it can be kept always allowable range operating current of the outdoor unit.
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
(実施の形態1)
図1は、本発明の第1の実施の形態における空気調和機の構成を示すものである。
(Embodiment 1)
FIG. 1 shows a configuration of an air conditioner according to a first embodiment of the present invention.
圧縮機1は回転数可変のブラシレスDCモータで駆動される能力可変圧縮機で、インバータ回路を含む制御回路を備えた制御装置2により回転数の制御を行う。また制御装置2は圧縮機1と室外機3のそれぞれの運転電流値を検出している。圧縮機1から吐出された冷媒は、四方弁4をとおり、暖房時は室内機5の室内熱交換器6で液化凝縮され、減圧膨張弁7で減圧膨張し、室外熱交換器8で吸熱し四方弁2を経て圧縮機1へ吸入される。 The compressor 1 is a variable capacity compressor driven by a brushless DC motor having a variable rotation speed, and the rotation speed is controlled by a control device 2 having a control circuit including an inverter circuit. The control device 2 detects the operating current values of the compressor 1 and the outdoor unit 3. The refrigerant discharged from the compressor 1 passes through the four-way valve 4 and is liquefied and condensed in the indoor heat exchanger 6 of the indoor unit 5 during heating, is decompressed and expanded by the decompression expansion valve 7, and absorbs heat by the outdoor heat exchanger 8. It is sucked into the compressor 1 through the four-way valve 2.
以上のように構成された空気調和機について、図2のフローチャートを用いて以下その動作、作用を説明する。 About the air conditioner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below using the flowchart of FIG.
まず、STEP1で圧縮機1のモータの回転数NHzとモータ電流Im、室外機3の運転電流Igを検出し、STEP2で図3に示す予めマイコンに記録されているNHzに対する位相進み幅βの特性に基づき、Im<所定値ImhかつIg<Ighのときはβ0の特性、そうでないときはβ1の特性よりモータ電圧に対するモータの電流位相βを決定する。 First, in step 1, the motor rotation speed NHz and motor current Im, and the outdoor unit 3 operating current Ig are detected, and in step 2, the characteristic of the phase advance width β with respect to NHz previously recorded in the microcomputer shown in FIG. Based on the above, the current phase β of the motor with respect to the motor voltage is determined from the characteristic of β0 when Im <predetermined value Imh and Ig <Igh, and otherwise the characteristic of β1.
STEP3ではNHzが目標回転数SHzに達していない場合はSTEP4でβに進み幅1を加算し進み幅を大きくする。SHzに到達していればそのままSTEP5に進む。 In STEP 3, when NHz has not reached the target rotational speed SHz, the process proceeds to β in STEP 4 and the width 1 is added to increase the advance width. If SHz has been reached, proceed directly to STEP5.
STEP5ではモータ電流Imと所定電流Imsを比較し、Imsを超えている場合はSTEP6でβを最大負荷においてもImが許容電流を超えない位相βsにする。Imsを超えていない場合はそのままSTEP7へ進む。
STEP7では室外機電流Igと所定電流Igsを比較し、Igsを超えている場合はSTEP8でβを最大負荷においてもIgが許容電流を超えない位相βsにしてリターンへ進み、制御1サイクルを終了する。Imgを超えていない場合はそのままリターンへ進む制御サイクルを繰り返す。
In STEP5, the motor current Im is compared with the predetermined current Ims, and if it exceeds Ims, β is set in STEP6 to a phase βs in which Im does not exceed the allowable current even at the maximum load. If it does not exceed Ims, proceed to STEP 7 as it is.
In STEP 7, the outdoor unit current Ig is compared with the predetermined current Igs. If it exceeds Igs, β is set to STEP βs in which Ig does not exceed the allowable current even in the maximum load in STEP 8, and the process proceeds to return to complete one cycle of control. . If the value does not exceed Img, the control cycle for proceeding to return is repeated.
このようにモータの電流位相をモータの回転数、モータの運転電流、室外機運転電流によって制御することにより、高負荷運転でのインバータ回路の電流値と室外機の運転電流値を許容範囲に収め、低負荷運転では位相を最大限に進めてモータの回転数を最大限まで高くすることにより、最大暖房能力を大幅に向上させることができる。 In this way, by controlling the motor current phase with the motor speed, motor operating current, and outdoor unit operating current, the current value of the inverter circuit and the operating current value of the outdoor unit during high-load operation are kept within an allowable range. In the low load operation, the maximum heating capacity can be greatly improved by maximizing the phase and maximizing the rotation speed of the motor.
なお、実施の形態の説明では、室外機の運転電流を用いる例で説明したが、一般に空気調和機の消費電力の大半は圧縮機であるため、駆動に用いるインバータ回路の入力電流や、空気調和機全体の運転電流で代用できる。また、この種の空気調和機には空間的に離れた少なくとも2つの機械ブロックより構成される空気調和機もあり、このような空気調和機の場合は、空気調和機の運転電流として、インバータ回路が備えられている側の機械ブロックの運転電流もしくはインバータ回路の入力電流を用いることもできる。 In the description of the embodiment, the example in which the operating current of the outdoor unit is used has been described. However, since most of the power consumption of the air conditioner is generally a compressor, the input current of the inverter circuit used for driving and the air conditioning The operating current of the entire machine can be substituted. In addition, this type of air conditioner also includes an air conditioner composed of at least two machine blocks that are spatially separated. In such an air conditioner, an inverter circuit is used as the operating current of the air conditioner. It is also possible to use the operating current of the machine block on the side provided with or the input current of the inverter circuit.
以上のように、本発明の空気調和機は高負荷運転でのインバータ回路の電流値と装置全体の運転電流値を許容範囲に収め、低負荷運転では位相を最大限に進めてモータの回転数を最大限まで高くすることができるので、ブラシレスDCモータをインバータで駆動するヒートポンプ給湯機や冷蔵庫等の用途にも適用できる。 As described above, the air conditioner of the present invention keeps the current value of the inverter circuit in the high load operation and the operation current value of the entire apparatus within the allowable range, and the motor speed is increased by maximizing the phase in the low load operation. Therefore, it can be applied to applications such as a heat pump water heater or a refrigerator that drives a brushless DC motor with an inverter.
1 圧縮機
2 制御装置(制御回路)
8 室外熱交換機(室外機)
1 Compressor 2 Control device (control circuit)
8 Outdoor heat exchanger (outdoor unit)
Claims (2)
In an air conditioner comprising a compressor driven by a brushless DC motor having a variable rotation speed, an inverter circuit for driving the motor, and a control circuit for controlling the inverter circuit, the rotation speed of the motor and the air conditioner of the air conditioner An air conditioner that controls a current phase of the motor based on an operating current, and controls a maximum value of a current phase of the motor to be a predetermined value or less when the operating current of the air conditioner exceeds a predetermined value. Machine.
Priority Applications (1)
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JP2008044209A JP5169305B2 (en) | 2008-02-26 | 2008-02-26 | Air conditioner |
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JP2008044209A JP5169305B2 (en) | 2008-02-26 | 2008-02-26 | Air conditioner |
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JP2009204173A JP2009204173A (en) | 2009-09-10 |
JP5169305B2 true JP5169305B2 (en) | 2013-03-27 |
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JP2008044209A Expired - Fee Related JP5169305B2 (en) | 2008-02-26 | 2008-02-26 | Air conditioner |
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Families Citing this family (1)
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JP5994631B2 (en) * | 2012-12-27 | 2016-09-21 | ダイキン工業株式会社 | Rotating electrical machine |
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JP2003033069A (en) * | 2001-07-12 | 2003-01-31 | Matsushita Electric Ind Co Ltd | Inverter controller and washing machine using it |
JP2003348875A (en) * | 2002-05-27 | 2003-12-05 | Matsushita Electric Ind Co Ltd | Motor driving device |
JP4259173B2 (en) * | 2003-04-28 | 2009-04-30 | パナソニック株式会社 | Electric compressor drive device |
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