JPS61105047A - Air conditioner containing pwm inverter - Google Patents

Air conditioner containing pwm inverter

Info

Publication number
JPS61105047A
JPS61105047A JP59226350A JP22635084A JPS61105047A JP S61105047 A JPS61105047 A JP S61105047A JP 59226350 A JP59226350 A JP 59226350A JP 22635084 A JP22635084 A JP 22635084A JP S61105047 A JPS61105047 A JP S61105047A
Authority
JP
Japan
Prior art keywords
motor
noise
pwm inverter
air conditioner
carrier frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP59226350A
Other languages
Japanese (ja)
Other versions
JP2568486B2 (en
Inventor
Shigeki Yamane
茂樹 山根
Keijiro Mori
森 継治郎
Kiyouya Sakamoto
坂本 京也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Ecology Systems Co Ltd
Panasonic Holdings Corp
Original Assignee
Matsushita Seiko Co Ltd
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Seiko Co Ltd, Matsushita Electric Industrial Co Ltd filed Critical Matsushita Seiko Co Ltd
Priority to JP59226350A priority Critical patent/JP2568486B2/en
Publication of JPS61105047A publication Critical patent/JPS61105047A/en
Application granted granted Critical
Publication of JP2568486B2 publication Critical patent/JP2568486B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE:To prevent audible vibration and noise from a motor as well as to offer an air conditioner of low cost and, furthermore, the maintenance of a belt becoming unnecessary. CONSTITUTION:When a carrier frequency of a PWM inverter 16 is heightened, the noise value of the air conditioner is largely decreased from about 8kHz, and at about 20kHz the noise becomes the same with the operation noise when the motor 6 is drived by an AC electric source. When the carrier frequency is heightened the input electric power value becomes large and the loss increases. Accordingly, when the PWM inverter 16 of which carrier frequency is above 8kHz and below 30kHz is used, even if a fan and motor is drived directly connected, uncomfortable noise is not generated, and low cost because of pulley is not necessary and maintenance free of a belt can be realized.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、内蔵のファンモータにより熱交換器従来例の
構成と1題点 近年、空調機の吹き出す風量を細かく可変するため、フ
ァン駆動用のモータにPWMインバータ装置を接続した
ものがある。このPWMインバータ装置を利用した従来
のPWMインバータ装置内蔵空調機を第6図〜第7図に
基づいて説明する。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is based on the structure of a conventional heat exchanger using a built-in fan motor. There is one that has a PWM inverter connected to it. A conventional air conditioner with a built-in PWM inverter using this PWM inverter will be explained based on FIGS. 6 and 7.

第5図において、吸入口14と吹き出し口15を有した
ケーシング1内に冷・温水の供給をするための冷・温水
の接続口3,4を有した熱交換器2と、この熱交換器2
より吸入側に設けたフィルタ5と、熱交換器2に送風す
るファン9と、このファン9のファンシャフト10およ
びファンシャフト1oに設けられたファンプーリ11と
を設けている。ケーシング1の上部にはファン9駆動用
のモータ6が取付けられており、モータシャフト ′7
に設けられたモータプーリ8とファンプーリ11とはベ
ルト12によりモータ6の駆動を伝達するようになって
いる。またモータeの回転数を制御するPWMインバー
タ装置13がモータθに接続されている。
In FIG. 5, a heat exchanger 2 having connection ports 3 and 4 for cold and hot water for supplying cold and hot water into a casing 1 having an inlet 14 and an outlet 15, and this heat exchanger 2
A filter 5 provided closer to the suction side, a fan 9 for blowing air to the heat exchanger 2, and a fan shaft 10 of the fan 9 and a fan pulley 11 provided on the fan shaft 1o are provided. A motor 6 for driving the fan 9 is attached to the upper part of the casing 1, and a motor shaft '7
The drive of the motor 6 is transmitted to the motor pulley 8 and fan pulley 11 provided in the motor pulley 8 and the fan pulley 11 through a belt 12. Further, a PWM inverter device 13 that controls the rotation speed of the motor e is connected to the motor θ.

以上の構成によれば、PWMインバータ装置13でモー
タ6の回転数を設定すれば、モータブー980回転がベ
ルト12を介してファンブーIJ 10に伝達されファ
ン9が回転する。このファン9の回転によ゛り空気は吸
入口14からフィルタ6を通り熱交換器2により冷却ま
たは加熱され、吹き出し口16より吹き出し、室内の冷
・暖房を行なう。
According to the above configuration, when the rotation speed of the motor 6 is set by the PWM inverter device 13, 980 rotations of the motor boot are transmitted to the fan boot IJ 10 via the belt 12, and the fan 9 rotates. As the fan 9 rotates, air passes through the filter 6 from the suction port 14, is cooled or heated by the heat exchanger 2, and is blown out from the air outlet 16 to cool and heat the room.

またモータ6を介してファンeの回転を制御するPWM
インバータ装置13の出力電圧は、第6図に示すように
、設定周波数の正弦波aと、111J+L〜のPWM信
号に基づいて出力されるものであるが、このような、P
WMインバータ装置13でモータ6を駆動し空調機を運
転すれば、キャリア周波数の2倍の振動、騒音が発生す
ることが判明している。現在、このPWMインバータ装
置13に用いられるスイッチング素子として、パワート
ランジスタが使用されており、素子の特性上キャリア周
波数の上限は、2此程度となりモータ運転時4凸程度の
騒音が発生する。このモータ6からの振動がファン9へ
伝播すれば、ファン9によりモータの数倍の騒音値が発
生するため、モータプーリ8゜ファンプーリ11を使用
し、振動伝播を防止するベルト駆動を用いる構成として
いる。そのため、以下の問題点をあげることができる。
Also, PWM controls the rotation of the fan e via the motor 6.
As shown in FIG. 6, the output voltage of the inverter device 13 is output based on a sine wave a of a set frequency and a PWM signal of 111J+L.
It has been found that when the motor 6 is driven by the WM inverter device 13 and the air conditioner is operated, vibrations and noise twice the carrier frequency are generated. Currently, a power transistor is used as a switching element used in this PWM inverter device 13, and due to the characteristics of the element, the upper limit of the carrier frequency is about 2, and noise of about 4 convex is generated when the motor is operated. If the vibrations from the motor 6 are propagated to the fan 9, the fan 9 will generate a noise value several times that of the motor. Therefore, a configuration using a motor pulley of 8 degrees and a fan pulley 11 and a belt drive to prevent vibration propagation is used. There is. Therefore, the following problems can be raised.

(1)  PWMインバータ装置13により、モータ6
運転すると、空調機から不快音が発生する。
(1) By the PWM inverter device 13, the motor 6
When driving, the air conditioner makes an unpleasant noise.

(2)モータプーリ8.ファンプーリ11およびベルト
12が必要となり・コスト高となる。
(2) Motor pulley 8. A fan pulley 11 and a belt 12 are required, resulting in high cost.

(3)ベルト駆動方式を採用しなければならず、ベルト
切れによるメンテナンスが必要となる。
(3) A belt drive system must be adopted, which requires maintenance due to belt breakage.

発明の目的 本発明は、上記従来例の問題点を解消するものであり、
PWMインバータ装置によるモータ運転において、モー
タからの可聴域での振動、騒音を防止するとともに、低
コストでかつベルトのメンテナンスが不要となるPWM
インバータ装置内蔵空調機を提供することを目的とする
Purpose of the Invention The present invention solves the problems of the above-mentioned conventional example.
When driving a motor using a PWM inverter device, PWM prevents vibration and noise in the audible range from the motor, is low cost, and does not require belt maintenance.
The purpose of the present invention is to provide an air conditioner with a built-in inverter device.

発明の構成 この目的を達成するため、本発明のインバータ装置内蔵
空調機は熱交換器と、この熱交換器に風を通す送風手段
を備え、前記送風手段に用いられるファンと直結したモ
ータを変速するためのPWMインバータ装置のキャリア
周波数を8匹以上3゜i以下とする構成としている。
Structure of the Invention In order to achieve this object, an air conditioner with a built-in inverter device of the present invention is provided with a heat exchanger and a blower means for passing air through the heat exchanger, and a motor directly connected to a fan used in the blower means is speed-changed. The carrier frequency of the PWM inverter device for this purpose is set to 8 or more and 3°i or less.

以上のようにPWMインバータ装置のキャリア周波数を
8klb以上、30klb以下とすることによシ、モー
タから発生する振動、騒音を16i以上とし、PWMイ
ンバータ装置による不快音を聞こえにくくし、併せてフ
ァンとモータの直結駆動により、コストダウンとベルト
のメンテナンス不要を実現するものである。
As mentioned above, by setting the carrier frequency of the PWM inverter device to 8 klb or more and 30 klb or less, the vibration and noise generated from the motor can be increased to 16 i or more, making it difficult to hear the unpleasant noise caused by the PWM inverter device. The direct drive of the motor reduces costs and eliminates the need for belt maintenance.

実施例の説明 本発明の実施例を第1図〜第4図に基づいて説明する。Description of examples Embodiments of the present invention will be described based on FIGS. 1 to 4.

第1図および第2図において、1はケーシング、2は熱
交換器、3,4は冷・温水の接続口、6はフィルタ、6
はモータ、7はモータシャフト、9はファン、14.1
5は空調機の吸入口、吹き出し口であり、これらは従来
と同一の構成要素であシ説明は省略する。モータ6とフ
ァン9は従来のようにベルトを用いず、モータシャフト
で直結されている。また、PWMインバータ装置16は
キャリア周波数8i以上30晶以下で動作するために、
スイッチング素子としてパワーMO8−FETを使用し
ている。このパワーMOS−FETはパワートランジス
タと本質的に構造が異なり、100klb以上のキャリ
ア周波数での出力も可能である。
In Figures 1 and 2, 1 is a casing, 2 is a heat exchanger, 3 and 4 are cold/hot water connections, 6 is a filter, 6
is the motor, 7 is the motor shaft, 9 is the fan, 14.1
Reference numeral 5 denotes an inlet and an outlet of the air conditioner, and since these are the same components as in the prior art, their explanation will be omitted. The motor 6 and the fan 9 are directly connected by a motor shaft without using a belt as in the conventional case. In addition, since the PWM inverter device 16 operates at a carrier frequency of 8i or more and 30c or less,
A power MO8-FET is used as a switching element. This power MOS-FET is essentially different in structure from a power transistor, and is also capable of outputting at a carrier frequency of 100 klb or more.

以上の構成の動作について説明する。第3図に示すよう
に、PWMインバータ装置1eのキャリア周波数を高く
すれば、8此程度から、空調機の騒音値が大きく低減し
、20klb程度でAC電源でモータ6を駆動させたと
きの運転音と同一になるのが確認できた。また、同時に
第4図に示すように、キャリア周波数を高くすると入力
電力値が大きくなり、損失が増加することも判明した。
The operation of the above configuration will be explained. As shown in Fig. 3, if the carrier frequency of the PWM inverter device 1e is increased, the noise value of the air conditioner will be significantly reduced from about 8 to this level, and the operation when the motor 6 is driven by AC power at about 20 klb. I was able to confirm that the sound was the same. Furthermore, as shown in FIG. 4, it has also been found that increasing the carrier frequency increases the input power value and increases the loss.

よって、キャリア周波数を8晶以上30klb以下とす
るPWMインバータ装置16を用いれば、ファン、モー
タ直結駆動としても、可聴範囲内での騒音は発生せず不
快音を生ずることがなく、かつプーリ不要による低コス
トとベルトのメンテナンス不要を実現することができる
Therefore, if the PWM inverter device 16 with a carrier frequency of 8 crystals or more and 30 klb or less is used, even if the fan and motor are directly connected to each other, no noise will be generated within the audible range and no unpleasant noise will be generated, and there will be no need for pulleys. It is possible to realize low cost and no need for belt maintenance.

発明の効果 以上の実施例の説明から明らかなように、本発明はPW
Mインバータ装置のキャリア周波数を8kHz以上、3
0klk以下とすることによシケーシング内でファンと
モータを直結して構成を簡易化し、低コストでベルトの
メンテナンスの不要を図す、かつ不快音が発生しないP
WMインバータ装置内蔵空調器の実現をもたらすもので
ある。
Effects of the Invention As is clear from the description of the embodiments above, the present invention
Set the carrier frequency of the M inverter device to 8kHz or higher, 3
By making the fan and motor less than 0 klk, the configuration is simplified by directly connecting the fan and motor within the casing, which reduces the cost and eliminates the need for belt maintenance, and does not generate unpleasant noise.
This brings about the realization of an air conditioner with a built-in WM inverter device.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明の一実施例におけるPWMインバータ
装置内蔵空調機の平面図、第2図は同正面図、第3図は
同PWMインバータ装置内蔵空調機に関する騒音特性図
、第4図は、同人力電力特性図、第5図は、従来例のP
WMインバータ装置内蔵空調機の基本構成図、第6図お
よび第7図は従来例のPWMインバータ装置の各部波形
図である。 2・・・・・・熱交換器、6・・・・・・フィルタ、6
・・・・・・モータ、9・・・・・・フ゛7ン、16・
・・・・・PWMインバータ装置。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 第 3f!t!ff 千ヤリア序シ1チ廻CWHK ) 狛4図 千ヤリア■巳波J矢 (kHz) 第5図 第6図 邪 7 図
FIG. 1 is a plan view of an air conditioner with a built-in PWM inverter according to an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a noise characteristic diagram of the air conditioner with a built-in PWM inverter, and FIG. , the same human power characteristic diagram, FIG. 5 is the conventional example P
A basic configuration diagram of an air conditioner with a built-in WM inverter device, and FIGS. 6 and 7 are waveform diagrams of various parts of a conventional PWM inverter device. 2...Heat exchanger, 6...Filter, 6
...Motor, 9...Fine 7, 16.
...PWM inverter device. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3f! T! ff Chiyaria sequence 1st turn CWHK) Koma 4 figure Chiyaria ■ Minami J arrow (kHz) Figure 5 Figure 6 Evil Figure 7

Claims (1)

【特許請求の範囲】[Claims] 熱交換器と、この熱交換器に風を通す送風手段を備え、
前記送風手段に用いられるファンと直結したモータを変
速するためのPWMインバータ装置のキャリア周波数を
8kHz以上、30kHz以下とするPWMインバータ
装置内蔵空調機。
Equipped with a heat exchanger and a blower means for passing air through the heat exchanger,
An air conditioner with a built-in PWM inverter device, wherein the carrier frequency of the PWM inverter device for changing the speed of a motor directly connected to a fan used in the air blowing means is 8 kHz or more and 30 kHz or less.
JP59226350A 1984-10-26 1984-10-26 Air conditioner equipped with PM inverter system Expired - Lifetime JP2568486B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59226350A JP2568486B2 (en) 1984-10-26 1984-10-26 Air conditioner equipped with PM inverter system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59226350A JP2568486B2 (en) 1984-10-26 1984-10-26 Air conditioner equipped with PM inverter system

Publications (2)

Publication Number Publication Date
JPS61105047A true JPS61105047A (en) 1986-05-23
JP2568486B2 JP2568486B2 (en) 1997-01-08

Family

ID=16843782

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59226350A Expired - Lifetime JP2568486B2 (en) 1984-10-26 1984-10-26 Air conditioner equipped with PM inverter system

Country Status (1)

Country Link
JP (1) JP2568486B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6704212B2 (en) 2002-01-30 2004-03-09 Hitachi, Ltd. PWM inverter with long carrier wave insertion

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5350422A (en) * 1976-10-18 1978-05-08 Mitsubishi Electric Corp Ac motor drive system
JPS5543916A (en) * 1978-09-20 1980-03-28 Hitachi Ltd Modulation device of pwm inverter
JPS5686809A (en) * 1979-12-14 1981-07-15 Hitachi Ltd Air flow rate controller for car air conditioner
JPS60129900U (en) * 1984-02-06 1985-08-31 ダイキン工業株式会社 Air flow control device for air conditioner fans

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5350422A (en) * 1976-10-18 1978-05-08 Mitsubishi Electric Corp Ac motor drive system
JPS5543916A (en) * 1978-09-20 1980-03-28 Hitachi Ltd Modulation device of pwm inverter
JPS5686809A (en) * 1979-12-14 1981-07-15 Hitachi Ltd Air flow rate controller for car air conditioner
JPS60129900U (en) * 1984-02-06 1985-08-31 ダイキン工業株式会社 Air flow control device for air conditioner fans

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6704212B2 (en) 2002-01-30 2004-03-09 Hitachi, Ltd. PWM inverter with long carrier wave insertion
DE10237882B4 (en) 2002-01-30 2018-06-28 Hitachi, Ltd. Pulse Width Modulation, Voltage Transformer and Inverter

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