JPH06235554A - Controlling method for air conditioner - Google Patents

Controlling method for air conditioner

Info

Publication number
JPH06235554A
JPH06235554A JP5044481A JP4448193A JPH06235554A JP H06235554 A JPH06235554 A JP H06235554A JP 5044481 A JP5044481 A JP 5044481A JP 4448193 A JP4448193 A JP 4448193A JP H06235554 A JPH06235554 A JP H06235554A
Authority
JP
Japan
Prior art keywords
compressor
fan motor
outdoor unit
current
detected
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.)
Withdrawn
Application number
JP5044481A
Other languages
Japanese (ja)
Inventor
Takaaki Oka
孝昭 岡
Haruyasu Kenmochi
晴康 剱持
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.)
Fujitsu General Ltd
Original Assignee
Fujitsu General 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 Fujitsu General Ltd filed Critical Fujitsu General Ltd
Priority to JP5044481A priority Critical patent/JPH06235554A/en
Publication of JPH06235554A publication Critical patent/JPH06235554A/en
Withdrawn legal-status Critical Current

Links

Landscapes

  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE:To prevent a decline in capacity and a bad effect on components during cooling operation by a method wherein a fan motor is operated prior to the operation of a compressor and the input current flowing into an outdoor unit is detected to keep the compressor from being brought into operation when the detected current does not reach a specified value. CONSTITUTION:When an operation instruction of a compressor 2 is input to an outdoor unit of an air conditioner, a fan motor 3 in the outdoor unit is operated before the compressor 2 is brought in operation and the current of an input power source 1 is detected. When the detected current does not reach a specified value, the fan motor 2 is deemed abnormal and the compressor 2 is not brought into operation. That is, the specified value is set at a value not larger than a current flowing into the fan motor 3 and a control circuit- Thereby, a decline in capacity and a bad effect on components during cooling operation can be prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は空気調和機の室外機に
用いられ、同室外機に流れる電流を検出し、この検出値
に基づいて同室外機を保護する空気調和機の制御方法に
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner control method for use in an outdoor unit of an air conditioner, detecting a current flowing through the outdoor unit and protecting the outdoor unit based on the detected value. Is.

【0002】[0002]

【従来の技術】この種の空気調和機の室外機は、例えば
図3に示す構成をしており、室内機を介して電源(例え
ば商用電源)1を入力するとともに、同室内機からの運
転指令を入力して圧縮機2やファンモータ3を制御す
る。
2. Description of the Related Art An outdoor unit of an air conditioner of this type has, for example, the configuration shown in FIG. 3, and a power source (for example, commercial power source) 1 is input through the indoor unit and operation from the indoor unit is performed. The command is input to control the compressor 2 and the fan motor 3.

【0003】図3において、この室外機は、圧縮機2
と、ファンモータ3と、入力電源1を直流電圧に変換し
て平滑化する整流回路4および平滑化回路5と、この平
滑化された直流電圧を交流に変換して圧縮機2を駆動す
るインバータ回路6と、その直流電圧を所定電圧(例え
ば5V)に変換するDC―DCコンバータ7と、入力電
源1の電流(室外機の入力電流)を検出する電流センサ
8および入力電流検出回路9と、その所定電圧を電源電
圧とし、室内機からの運転指令に基づいて圧縮機2およ
びファンモータ3を制御する制御部(マイクロコンピュ
ータ)10と、この制御部10から出力されるPWM信
号によりインバータ回路6のトランジスタを駆動するイ
ンバータドライブ回路11と、ファンモータ3に電源1
を供給可能とするリレー12と、制御部10から出力さ
れる駆動信号によりリレー12を駆動するファンモータ
駆動回路13とを備えている。
In FIG. 3, the outdoor unit is a compressor 2
A fan motor 3, a rectifier circuit 4 and a smoothing circuit 5 for converting the input power source 1 into a DC voltage for smoothing, and an inverter for converting the smoothed DC voltage into an AC to drive the compressor 2. A circuit 6, a DC-DC converter 7 for converting a DC voltage thereof into a predetermined voltage (for example, 5 V), a current sensor 8 for detecting a current of the input power source 1 (an input current of the outdoor unit), and an input current detection circuit 9, The control circuit (microcomputer) 10 that controls the compressor 2 and the fan motor 3 based on the operation command from the indoor unit using the predetermined voltage as a power supply voltage, and the inverter circuit 6 by the PWM signal output from the control unit 10. Inverter drive circuit 11 that drives the transistors of
And a fan motor drive circuit 13 that drives the relay 12 by a drive signal output from the control unit 10.

【0004】そして、上記室外機の制御部10は、室内
機からの運転指令により圧縮機2やファンモータ3を制
御する一方、例えば入力電流検出回路9による検出値に
基づいて入力電流保護機能(例えば圧縮機2の運転周波
数を可変することで入力電流を所定値以下に抑える機
能)を作動し、またインバータ回路6の過電流保護機能
および温度保護機能を作動する。
The control unit 10 of the outdoor unit controls the compressor 2 and the fan motor 3 in accordance with the operation command from the indoor unit, while the input current protection function (for example, based on the value detected by the input current detection circuit 9). For example, the function of suppressing the input current to a predetermined value or less by operating the operating frequency of the compressor 2) is activated, and the overcurrent protection function and the temperature protection function of the inverter circuit 6 are also activated.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、上記空
気調和機の室外機においては、上記ファンモータ3の駆
動を検出していないため、同ファンモータ3が動いてい
ない場合、例えばファンモータ3が故障し、あるいはリ
レー12やファンモータ駆動回路13が故障している場
合、室外側熱交換器における熱交換が正規に行われなく
なり、能力が低下するだけなく、圧縮機2の運転周波数
の増大、ひいては冷房運転時同圧縮機2への電流が増大
し、この結果各部品(回路)に悪影響を及ぼすという問
題点があった。
However, in the outdoor unit of the air conditioner, since the drive of the fan motor 3 is not detected, when the fan motor 3 is not operating, for example, the fan motor 3 fails. However, if the relay 12 or the fan motor drive circuit 13 is out of order, the heat exchange in the outdoor heat exchanger will not be performed properly, resulting in a decrease in capacity and an increase in the operating frequency of the compressor 2, There is a problem that the current to the compressor 2 increases during the cooling operation, and as a result, each component (circuit) is adversely affected.

【0006】この発明は上記課題に鑑みなされたもので
あり、その目的は圧縮機の運転に先だってファンモータ
の駆動を検出することができ、能力低下、各部品への悪
影響を防止し得る空気調和機の制御方法を提供すること
にある。
The present invention has been made in view of the above problems, and an object thereof is an air conditioner capable of detecting the drive of a fan motor prior to the operation of a compressor and capable of preventing performance deterioration and adverse effects on each component. It is to provide a control method of the machine.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
に、この発明は圧縮機とファンモータを有する室外機の
入力電流を検出し、この検出電流値に基づいて保護機能
を作動する空気調和機の制御方法において、上記圧縮機
の運転に先だって上記ファンモータを駆動するととも
に、上記室外機の入力電流を検出し、この検出電流値が
所定値に達していないときには上記圧縮機の運転を行わ
ないようにしたことを特徴としている。
In order to achieve the above object, the present invention detects an input current of an outdoor unit having a compressor and a fan motor and operates a protection function based on the detected current value. In the control method of the machine, the fan motor is driven prior to the operation of the compressor, the input current of the outdoor unit is detected, and the compressor is operated when the detected current value does not reach a predetermined value. It is characterized by not doing so.

【0008】[0008]

【作用】上記方法としたので、室内機からの運転指令
(圧縮機の運転指令)が室外機に入力されると、同室外
機においては圧縮機を運転する前に室外側熱交換器のフ
ァンモータを駆動するとともに、入力電源の電流(室外
機の入力電流)を検出する。そして、その検出電流値が
所定値に達していないときには、ファンモータが異常で
あるとして圧縮機の運転を行なわない。すなわち、その
所定値としては、ファンモータと制御回路に流れる電流
値以下の値を設定する(圧縮機に流れる電流は含まな
い)。
With the above method, when the operation command (operation command of the compressor) from the indoor unit is input to the outdoor unit, the fan of the outdoor heat exchanger in the outdoor unit is operated before the compressor is operated. While driving the motor, it detects the current of the input power supply (the input current of the outdoor unit). When the detected current value does not reach the predetermined value, it is determined that the fan motor is abnormal and the compressor is not operated. That is, the predetermined value is set to a value equal to or less than the current value flowing in the fan motor and the control circuit (excluding the current flowing in the compressor).

【0009】これにより、ファンモータが駆動していな
いにもかかわらず、圧縮機の運転が行われることもない
ため、能力低下、冷房運転時の各部品への悪影響を防止
することができる。
As a result, the compressor is not operated even though the fan motor is not driven, so that it is possible to prevent the performance from being deteriorated and adversely affecting each component during the cooling operation.

【0010】[0010]

【実施例】この発明の空気調和機の制御方法は、圧縮機
を運転する前に、室外側のファンモータを駆動するとと
もに、室外機の入力電流を検出し、この電流の検出値が
所定値に達していないときには圧縮機の運転を行わない
ようにする。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The air conditioner control method of this invention is to drive the fan motor on the outdoor side and detect the input current of the outdoor unit before operating the compressor, and the detected value of this current is a predetermined value. Do not operate the compressor when it has not reached.

【0011】そのため、図1に示すように、この空気調
和機の室外機は、室内機から出力される運転指令に基づ
いて圧縮機2を運転するに際し、同圧縮機2の運転に先
だってファンモータ3を駆動するとともに、入力電流検
出回路9による検出値(室外機の入力電流値)と記憶部
14aに記憶されている所定値とを比較し、そのファン
モータ3の回転を検出する制御部14を備えている。な
お、制御部14は図3に示す制御部10の機能を有して
おり、また図中、図3と同一部分には同一符号を付し重
複説明を省略する。
Therefore, as shown in FIG. 1, in the outdoor unit of this air conditioner, when the compressor 2 is operated based on the operation command output from the indoor unit, the fan motor is operated prior to the operation of the compressor 2. The control unit 14 that drives the motor 3 and compares the detection value (input current value of the outdoor unit) by the input current detection circuit 9 with a predetermined value stored in the storage unit 14a to detect the rotation of the fan motor 3. Is equipped with. The control unit 14 has the function of the control unit 10 shown in FIG. 3, and in the figure, the same parts as those in FIG.

【0012】次に、上記構成の空気調和機(室外機)の
制御方法を図2のフローチャート図を参照して詳しく説
明すると、まず当該空気調和機の室内機から圧縮機2の
運転指令(圧縮機2の運転周波数)が出力されているも
のとする。その運転指令が室外機の制御部14に入力さ
れると(ステップST1)、同制御部14にて圧縮機2
を運転する前にリレー12がオンされ、ファンモータ3
が駆動される(ステップST2)。
Next, the control method of the air conditioner (outdoor unit) having the above structure will be described in detail with reference to the flow chart of FIG. 2. First, the operation command (compression of the compressor 2 from the indoor unit of the air conditioner is compressed). The operating frequency of the machine 2) is output. When the operation command is input to the control unit 14 of the outdoor unit (step ST1), the control unit 14 causes the compressor 2 to operate.
Relay 12 is turned on before operating the fan motor 3
Are driven (step ST2).

【0013】続いて、制御部14にて電流センサ8およ
び入力電流検出回路9によって検出されている入力電源
1の電流値(室外機の入力電流値)が入力され、この入
力電流値と記憶部14aの所定値とが比較される(ステ
ップST3)。この記憶部14aの所定値としては、フ
ァンモータと制御回路に流れる電流以下の値が設定され
ている。
Then, the current value of the input power source 1 (the input current value of the outdoor unit) detected by the current sensor 8 and the input current detection circuit 9 is input to the control unit 14, and the input current value and the storage unit are input. The predetermined value of 14a is compared (step ST3). As the predetermined value of the storage unit 14a, a value equal to or less than the current flowing through the fan motor and the control circuit is set.

【0014】そして、上記比較結果により入力電流の検
出値が所定値に達していないときにはステップST4に
進み、ファンモータ3が駆動していないと判断し、つま
りファンモータ3あるいはファンモータ駆動回路13等
が故障しているものと判断し、ファンモータ3の異常を
表示部15に表示するとともに、入力運転指令にかかわ
らず、圧縮機2を停止したままとする。なお、表示部1
5は室内機に設けるようにしてもよい。また、このファ
ンモータ3の異常表示により、当該空気調和機が故障で
ある旨を知ることができる。
When the detected value of the input current does not reach the predetermined value as a result of the comparison, the process proceeds to step ST4, and it is determined that the fan motor 3 is not driven, that is, the fan motor 3 or the fan motor drive circuit 13 or the like. Is determined to be faulty, the abnormality of the fan motor 3 is displayed on the display unit 15, and the compressor 2 is kept stopped regardless of the input operation command. The display unit 1
5 may be provided in the indoor unit. Further, it is possible to know that the air conditioner is out of order by the abnormality display of the fan motor 3.

【0015】一方、上記比較結果により室外機の入力電
流の検出値が所定値を越えているときにはステップST
5に進み、ファンモータ3が回転していると判断し、入
力運転指令にしたがって通常運転を行なう(圧縮機2を
回転する)。
On the other hand, when the detected value of the input current of the outdoor unit exceeds the predetermined value as a result of the comparison, step ST
5, the fan motor 3 is determined to be rotating, and the normal operation is performed according to the input operation command (the compressor 2 is rotated).

【0016】このように、圧縮機2を運転する前に、室
外機の入力電流を検出し、この検出値が所定値に達して
いないときにはファンモータ3が回転していないと判断
し、入力運転指令にかからわずに圧縮機2を運転しない
ようにしたので、ファンモータ3の異常を検知でき、例
えば冷房運転時に圧縮機2への電流が増大し、ひいては
各部品への悪影響を防止することができる。なお、ファ
ンモータ3が回転しているか否かの判断を繰り返して行
い、かつ数回行って異常を判断すればより正確な判断が
可能である。
As described above, before operating the compressor 2, the input current of the outdoor unit is detected, and when the detected value does not reach the predetermined value, it is determined that the fan motor 3 is not rotating, and the input operation is performed. Since the compressor 2 is not operated regardless of the command, an abnormality of the fan motor 3 can be detected, and for example, the current to the compressor 2 is increased during the cooling operation, thereby preventing adverse effects on each component. be able to. It should be noted that a more accurate determination can be made by repeatedly determining whether or not the fan motor 3 is rotating, and performing the determination several times to determine an abnormality.

【0017】[0017]

【発明の効果】以上説明したように、この発明の空気調
和機の制御方法は、圧縮機の運転に際し、同圧縮機の運
転に先だってファンモータを駆動するとともに、室外機
の入力電流を検出し、この電流の検出値が所定値に達し
ていないときには圧縮機2の運転を行わないようにした
ので、ファンモータ3の異常を検知でき、例えば冷房運
転時に圧縮機2への電流が増大し、ひいては各部品への
悪影響を防止することができる。
As described above, according to the method for controlling an air conditioner of the present invention, when the compressor is operated, the fan motor is driven prior to the operation of the compressor, and the input current of the outdoor unit is detected. Since the compressor 2 is not operated when the detected value of this current has not reached the predetermined value, an abnormality of the fan motor 3 can be detected, and the current to the compressor 2 increases during cooling operation, for example. As a result, it is possible to prevent adverse effects on each component.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の一実施例を示す空気調和機の室外機
の概略的部分ブロック線図である。
FIG. 1 is a schematic partial block diagram of an outdoor unit of an air conditioner showing an embodiment of the present invention.

【図2】図1に示す室外機の動作を説明する概略的フロ
ーチャート図である。
FIG. 2 is a schematic flowchart illustrating the operation of the outdoor unit shown in FIG.

【図3】従来の空気調和機の室外機の概略的部分ブロッ
ク線図である。
FIG. 3 is a schematic partial block diagram of an outdoor unit of a conventional air conditioner.

【符号の説明】[Explanation of symbols]

1 電源(商用電源) 2 圧縮機 3 ファンモータ 8 電流センサ 9 入力電流検出回路 10,14 制御部(マイクロコンピュータ) 13 ファンモータ駆動回路 14a 記憶部 15 表示部 1 Power Supply (Commercial Power Supply) 2 Compressor 3 Fan Motor 8 Current Sensor 9 Input Current Detection Circuit 10, 14 Control Section (Microcomputer) 13 Fan Motor Drive Circuit 14a Storage Section 15 Display Section

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 圧縮機とファンモータを有する室外機の
入力電流を検出し、該検出電流値に基づいて保護機能を
作動する空気調和機の制御方法において、前記圧縮機の
運転に先だって前記ファンモータを駆動するとともに、
前記室外機の入力電流を検出し、該検出電流が所定値に
達していないときには前記圧縮機の運転を行わないよう
にしたことを特徴とする空気調和機の制御方法。
1. A method for controlling an air conditioner, which detects an input current of an outdoor unit having a compressor and a fan motor and operates a protection function based on the detected current value, wherein the fan is operated prior to the operation of the compressor. While driving the motor,
An air conditioner control method comprising detecting the input current of the outdoor unit and not operating the compressor when the detected current does not reach a predetermined value.
JP5044481A 1993-02-09 1993-02-09 Controlling method for air conditioner Withdrawn JPH06235554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5044481A JPH06235554A (en) 1993-02-09 1993-02-09 Controlling method for air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5044481A JPH06235554A (en) 1993-02-09 1993-02-09 Controlling method for air conditioner

Publications (1)

Publication Number Publication Date
JPH06235554A true JPH06235554A (en) 1994-08-23

Family

ID=12692734

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5044481A Withdrawn JPH06235554A (en) 1993-02-09 1993-02-09 Controlling method for air conditioner

Country Status (1)

Country Link
JP (1) JPH06235554A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008029411A (en) * 2006-07-26 2008-02-14 Sanyo Electric Co Ltd Cold showcase
JP2011027347A (en) * 2009-07-27 2011-02-10 Mitsubishi Electric Corp Air conditioner
WO2017217383A1 (en) * 2016-06-14 2017-12-21 東芝キヤリア株式会社 Refrigeration cycle device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008029411A (en) * 2006-07-26 2008-02-14 Sanyo Electric Co Ltd Cold showcase
JP2011027347A (en) * 2009-07-27 2011-02-10 Mitsubishi Electric Corp Air conditioner
WO2017217383A1 (en) * 2016-06-14 2017-12-21 東芝キヤリア株式会社 Refrigeration cycle device
JPWO2017217383A1 (en) * 2016-06-14 2019-01-17 東芝キヤリア株式会社 Refrigeration cycle equipment
KR20190006544A (en) * 2016-06-14 2019-01-18 도시바 캐리어 가부시키가이샤 Refrigeration cycle unit
JP2020073849A (en) * 2016-06-14 2020-05-14 東芝キヤリア株式会社 Refrigeration cycle device

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20000509