JP2002340451A - Outdoor unit of air conditioner - Google Patents
Outdoor unit of air conditionerInfo
- Publication number
- JP2002340451A JP2002340451A JP2001150259A JP2001150259A JP2002340451A JP 2002340451 A JP2002340451 A JP 2002340451A JP 2001150259 A JP2001150259 A JP 2001150259A JP 2001150259 A JP2001150259 A JP 2001150259A JP 2002340451 A JP2002340451 A JP 2002340451A
- Authority
- JP
- Japan
- Prior art keywords
- rotation speed
- motor
- current value
- outdoor unit
- current
- 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
Links
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気調和機の室外機
に関わり、特に軸流ファンとＤＣモータから成る軸流送
風機を備えた空気調和機の室外機に好適である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit of an air conditioner, and is particularly suitable for an outdoor unit of an air conditioner provided with an axial blower comprising an axial fan and a DC motor.
【０００２】[0002]
【従来の技術】室外ファンを回転させるＤＣモータの出
力電圧を検出して、正常電圧範囲になるまで除霜運転を
繰り返すことにより、暖房時、室外熱交換器に着霜・氷
結した霜を確実に融解し、円滑な暖房運転を行うことが
知られ、例えば特開平１０−２４６５４２号公報に記載
されている。2. Description of the Related Art An output voltage of a DC motor for rotating an outdoor fan is detected, and a defrosting operation is repeated until a normal voltage range is reached. And a smooth heating operation is known, for example, as described in JP-A-10-246542.
【０００３】また、ファン回転数の不安定な変化状態を
回転数検出手段により検出して、着霜を判定することが
特開平９−３２４９６８号公報に記載されている。Japanese Patent Application Laid-Open No. 9-324968 describes that frost formation is detected by detecting an unstable change state of the fan speed by a speed detecting means.
【０００４】[0004]
【発明が解決しようとする課題】上記ＤＣモータの出力
電圧または出力電流を検出して熱交換器の着霜を判定す
る方法では、熱交換器が着霜した場合にＤＣモータの駆
動手段はＤＣモータの回転数を一定に保つようＤＣモー
タの運転電流を増加させるため、着霜していない状態の
ＤＣモータの運転電流と比較すると電流値は非常に大き
くなる。そのため、ＤＣモータならびに駆動手段を小型
化、低コスト化するうえで不利となる。In the above-described method of determining the frost of the heat exchanger by detecting the output voltage or the output current of the DC motor, when the heat exchanger is frosted, the driving means of the DC motor uses a DC motor. In order to increase the operating current of the DC motor so as to keep the rotation speed of the motor constant, the current value is very large as compared with the operating current of the DC motor in a non-frosted state. This is disadvantageous in reducing the size and cost of the DC motor and the driving means.
【０００５】また、軸流ファンを採用した室外機におい
ては、ある着霜量に達してもファン回転数の変化状態が
さほど変わらず、着霜を判定することが困難である。Further, in an outdoor unit employing an axial fan, even if a certain amount of frost is reached, the state of change in the fan speed does not change so much, and it is difficult to determine frost formation.
【０００６】本発明の目的は、上記課題を解決し、正確
に着霜が判定でき、かつ熱交換器に着霜した霜を確実に
取り除くことができる空気調和機の室外機を提供するこ
とにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an outdoor unit of an air conditioner which solves the above-mentioned problems, can accurately determine frost formation, and can reliably remove frost formed on a heat exchanger. is there.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、熱交換器と、ＤＣモータで駆動される軸
流送風機と、を備えた空気調和機の室外機において、Ｄ
Ｃモータの回転数を検出する回転数検出手段を備え、予
めＤＣモータの回転数と、熱交換器の着霜量と、の関係
より除霜開始回転数と除霜終了回転数を定め、回転数検
出手段により検出される回転数が除霜開始回転数以下に
なると除霜を開始し、除霜終了回転数以上になると除霜
を終了するものである。In order to solve the above-mentioned problems, the present invention relates to an outdoor unit of an air conditioner having a heat exchanger and an axial blower driven by a DC motor.
A rotation speed detecting means for detecting the rotation speed of the C motor is provided, and the rotation speed of the DC motor and the amount of frost of the heat exchanger are determined in advance to determine the rotation speed of the defrosting start and the rotation speed of the defrosting end. The defrosting is started when the rotation speed detected by the number detecting means is equal to or lower than the defrosting start rotation speed, and is ended when the rotation speed is equal to or higher than the defrosting end rotation speed.
【０００８】これにより、正確な着霜を判定でき、かつ
熱交換器に着霜した霜を確実に取り除くことができる。[0008] This makes it possible to accurately determine frost formation and to reliably remove frost formed on the heat exchanger.
【０００９】また、上記のものにおいて、ＤＣモータの
電流値を検出する電流検出手段と、送風運転時の電流値
と前記除霜開始回転数及び除霜終了回転数との関係を示
したデータテーブルと、を備え、暖房運転前に送風運転
を行い、電流検出手段により検出されたＤＣモータの電
流値と、データテーブルと、に基づいて前記除霜開始回
転数及び除霜終了回転数を決定することが望ましい。Further, in the above-mentioned apparatus, a current detecting means for detecting a current value of the DC motor, a data table showing a relationship between a current value during a blowing operation and the defrost start rotation speed and defrost end rotation speed. And performing a blowing operation before the heating operation, and determining the defrost start rotation speed and the defrost end rotation speed based on the current value of the DC motor detected by the current detection unit and the data table. It is desirable.
【００１０】これにより、暖房運転前の熱交換器の目詰
まり状態を把握することができ、着霜以外の目詰まりの
影響を無視した状態で熱交換器の着霜をより正確に判定
することが可能となる。さらに、上記のものにおいて、
ＤＣモータの電流値を検出する電流検出手段と、電流検
出手段により検出される電流値が予め設定された電流値
を超えないようにＤＣモータの回転数を制御する電流制
御手段と、送風運転時の電流値と予め設定された電流値
との関係を示したデータテーブルと、を備え、 暖房運
転前に送風運転を行い、電流検出手段により検出された
ＤＣモータの電流値と、データテーブルと、に基づいて
予め設定された電流値を決定することが望ましい。[0010] Thereby, the clogging state of the heat exchanger before the heating operation can be grasped, and the frost formation of the heat exchanger can be more accurately determined while ignoring the influence of clogging other than frost formation. Becomes possible. Further, in the above,
Current detection means for detecting the current value of the DC motor; current control means for controlling the number of revolutions of the DC motor so that the current value detected by the current detection means does not exceed a preset current value; A data table showing the relationship between the current value of the current and a preset current value, performing a blowing operation before the heating operation, the current value of the DC motor detected by the current detection means, a data table, It is desirable to determine a preset current value based on the current value.
【００１１】さらに、上記のものにおいて、送風運転時
の回転数と除霜開始回転数及び除霜終了回転数との関係
を示したデータテーブルを備え、暖房運転前に送風運転
を行い、回転数検出手段から検出されたＤＣモータの回
転数と、データテーブルと、に基づいて除霜開始回転数
及び除霜終了回転数を決定することが望ましい。Further, in the above apparatus, a data table is provided which shows a relationship between a rotation speed during the air blowing operation, a defrost start rotation speed and a defrost end rotation speed, and the air blowing operation is performed before the heating operation. It is desirable to determine the defrost start rotation speed and the defrost end rotation speed based on the DC motor rotation speed detected by the detection means and the data table.
【００１２】さらに、上記のものにおいて、ＤＣモータ
の電流値を検出する電流検出手段と、電流検出手段によ
り検出される電流値が予め設定された電流値を超えない
ようにＤＣモータの回転数を制御する電流制御手段と、
送風運転時の回転数と予め設定された電流値との関係を
示したデータテーブルと、を備え、 暖房運転前に送風
運転を行い、回転数検出手段から検出されたＤＣモータ
の回転数と、データテーブルと、に基づいて予め設定さ
れた電流値を決定することが望ましい。Further, in the above-mentioned device, a current detecting means for detecting a current value of the DC motor, and a rotational speed of the DC motor such that the current value detected by the current detecting means does not exceed a preset current value. Current control means for controlling;
A data table showing a relationship between the number of rotations during the blowing operation and a preset current value, and performing a blowing operation before the heating operation, the number of rotations of the DC motor detected by the number of rotations detection unit, It is desirable to determine a preset current value based on the data table.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図面
を用いて説明する。図１は本発明の第１の実施例におけ
る空気調和機の室外機の構成を示したもので、室外機は
熱交換器１と、軸流ファン２ならびにＤＣモータ３を有
する軸流送風機と、を備え、ＤＣモータを駆動する駆動
手段４と、ＤＣモータの回転数を検出する回転数検出手
段５と、ＤＣモータの電流値を検出する電流検出手段６
と、電流検出手段から出力された電流値が予め設定した
電流値を超えないようにＤＣモータの回転数を制御する
電流制御手段７と、回転数検出手段から検出された回転
数と予め設定した除霜開始回転数および除霜終了回転数
とを比較する回転数判定手段８とを有する。室外機制御
手段９は電流制御手段７、回転数判定手段８を備える。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of an outdoor unit of an air conditioner according to a first embodiment of the present invention. The outdoor unit includes a heat exchanger 1, an axial fan 2 and an axial blower having a DC motor 3, A driving means 4 for driving a DC motor, a rotation speed detecting means 5 for detecting the rotation speed of the DC motor, and a current detecting means 6 for detecting a current value of the DC motor.
Current control means 7 for controlling the number of rotations of the DC motor so that the current value output from the current detection means does not exceed a preset current value; and the number of rotations detected by the number of rotations detection means is set in advance. A rotation speed judging means for comparing a defrost start rotation speed and a defrost end rotation speed; The outdoor unit control means 9 includes a current control means 7 and a rotation speed determination means 8.
【００１４】図２は電流制御手段７の制御フローを示
し、電流制御手段７は電流検出手段６から出力される電
流Ｉを監視して、予め設定した電流値Ｉ１、Ｉ２、Ｉ３
とを比較して、Ｉ≧Ｉ3の関係が成立すると、ＤＣモー
タの回転数をΔＮ下げるよう駆動手段４に信号を伝達し
て、Ｉ＜Ｉ2となるまで伝達し続ける。Ｉ＜Ｉ2となった
時点で電流制御手段７はその時点の回転数を保つように
駆動手段４に信号を伝達する。また、Ｉ＜Ｉ１の関係が
成立すると、電流制御手段７は室外機制御手段９で設定
されている回転数Ｎ１で運転するよう駆動手段４に信号
を伝達する。このとき、ＤＣモータの回転数は、Ｉ≧Ｉ
3の関係が成立すれば、再度ＤＣモータの回転数をΔＮ
下げるよう駆動手段４に信号を伝達する。Ｉ≧Ｉ3の関
係が成立しなければ、そのまま回転数Ｎ１で運転する。
図３は上記において空気調和機を運転した場合のＤＣモ
ータの運転電流ならびに回転数の変化を示したものであ
る。空気調和機の運転を開始すると、室外機制御手段９
はＤＣモータの駆動手段４に設定された回転数Ｎ1で運
転するよう信号を伝達する。これにより、ＤＣモータ３
ならびに軸流ファン２が回転して熱交換器１が冷却され
る。冷却された熱交換器１は着霜が進行し、室外機の通
風抵抗が増加する。ＤＣモータ３はこの負荷変動で回転
数が低下するが、ＤＣモータの駆動手段４はＤＣモータ
３の運転電流を増加させて、設定された回転数Ｎ１を保
つように制御される。(図３ａ部)電流制御手段７は電流
検出手段６から出力される電流値Ｉと予め設定した電流
値Ｉ１、Ｉ２、Ｉ３とを比較して、Ｉ≧Ｉ3の関係が成
立すると、Ｉ＜Ｉ2となるまで回転数低下の信号を駆動
手段４に伝達する。暖房運転中は着霜が進行して室外機
の通風抵抗が増加し続けるため、電流制御手段７は上記
動作を繰り返し行い、ＤＣモータの回転数は徐々に低下
しいく(図３ｂ部)。一方、回転数判定手段８は、回転数
検出手段４から出力される回転数Ｎと予め設定した除霜
開始回転数Ｎ２とを比較して、Ｎ≦Ｎ２の関係が成立す
ると、熱交換器１が着霜で目詰まりし、熱交換能力が低
下していると判断して、室外機の運転を暖房運転から除
霜運転に切替える。次に、除霜運転が進むと熱交換器１
の着霜量の減少に伴い、室外機の通風抵抗も減少し、同
時にＤＣモータの運転電流Ｉも減少する。電流制御手段
７は、Ｉ＜Ｉ１となると室外機制御手段９で設定された
回転数Ｎ １で運転するよう駆動手段４に信号を伝達す
る。除霜開始回転数Ｎ２まで低下していたＤＣモータの
回転数は設定された回転数Ｎ１まで上昇しようとする。
しかし、熱交換器に着霜した霜が融解し除霜が完全に終
了していなければ、室外機の通風抵抗が十分減少してい
ないためにＩ≧Ｉ3の関係が成立して、電流制御手段７
はＤＣモータの回転数をΔＮ下げるよう駆動手段４に信
号を伝達して、Ｉ＜Ｉ 2となるまで伝達し続ける。さら
に除霜運転が進むと、室外機の通風抵抗が減少するため
再びＩ＜Ｉ１の関係が成立して、ＤＣモータの回転数は
設定された回転数Ｎ１まで再度上昇しようとする。電流
制御手段７は上記動作を繰り返し行い、ＤＣモータ３の
回転数は徐々に上昇していく（図３ｃ部）。一方、回転
数判定手段８は、回転数検出手段４から出力される回転
数Ｎと予め設定した除霜終了回転数Ｎ３を比較して、Ｎ
≧Ｎ３の関係が成立すると、熱交換器に着霜した霜が完
全に融解し、除霜が完全に終了したと判断して、室外機
の運転を除霜運転から暖房運転に切替える。図４は第２
の実施例における空気調和機の室外機の構成を示したも
ので、本実施例の室外機は熱交換器１と軸流ファン２な
らびにＤＣモータ３を有し、ＤＣモータを駆動する駆動
手段４と、ＤＣモータの回転数を検出する回転数検出手
段５と、ＤＣモータの電流値を検出する電流検出手段６
と、電流検出手段から出力された電流値が予め設定した
電流値を超えないようにＤＣモータの回転数を制御する
電流制御手段７と、回転数検出手段から検出された回転
数と予め設定した除霜開始回転数および終了回転数とを
比較する回転数判定手段８とを有する。室外制御手段９
は電流制御手段７、回転数判定手段８ならびに送風運転
でのＤＣモータの電流値と回転数判定手段８の除霜開始
回転数および終了回転数との相関関係を示したデータを
記憶したデータテーブル１０ａを備える。上記におい
て、空気調和機の暖房運転を開始する前に軸流送風機の
みで送風運転を行い、電流検出手段６から出力される電
流値を用いて、電流制御手段の電流値Ｉ１、Ｉ２、Ｉ３
と回転数判定手段の除霜開始回転数Ｎ２および終了回転
数Ｎ ３とを、データテーブル１０ａから決定する。図５
は第３の実施例における空気調和機の室外機の構成を示
したもので、熱交換器１と軸流ファン２ならびにＤＣモ
ータ３を有し、ＤＣモータを駆動する駆動手段４と、Ｄ
Ｃモータの回転数を検出する回転数検出手段５と、ＤＣ
モータの電流値を検出する電流検出手段６と、電流検出
手段から出力された電流値が予め設定した電流値を超え
ないようにＤＣモータの回転数を制御する電流制御手段
７と、回転数検出手段から検出された回転数と予め設定
した除霜開始回転数および終了回転数とを比較する回転
数判定手段８とを有する。室外制御手段９は電流制御手
段７、回転数判定手段８ならびに送風運転でのＤＣモー
タの回転数と回転数判定手段８の除霜開始回転数および
終了回転数との相関関係を示したデータを記憶したデー
タテーブル１０ｂを備える。上記において、空気調和機
の暖房運転を開始する前に軸流ファン２ならびにＤＣモ
ータ３から成る軸流送風機３のみで送風運転を行い、回
転数検出手段から出力される回転数を用いて、電流制御
手段の電流値Ｉ１、Ｉ２、Ｉ３と回転数判定手段の除霜
開始回転数Ｎ２および終了回転数Ｎ３とを、データテー
ブル１０ｂから決定する。FIG. 2 shows a control flow of the current control means 7.
The current control means 7 outputs the electric power output from the current detection means 6.
The current I is monitored and the current I1, I2, I3
And I ≧ IThreeIs established, the DC mode
Signal to the driving means 4 so as to decrease the rotation speed of the motor by ΔN.
And I <ITwoContinue to communicate until I <ITwoBecame
At this time, the current control means 7 keeps the rotation speed at that time.
A signal is transmitted to the driving means 4. Also, I <I1The relationship
When it is established, the current control means 7 is set by the outdoor unit control means 9
Rotation speed N1To drive means 4 to drive
To communicate. At this time, the rotation speed of the DC motor is I ≧ I
ThreeIs satisfied, the rotation speed of the DC motor is again set to ΔN
A signal is transmitted to the driving means 4 so as to lower it. I ≧ IThreeNoseki
If the engagement is not established, the rotation speed N1Drive with
FIG. 3 shows the DC mode when the air conditioner is operated in the above.
The change in operating current and rotation speed of the motor.
You. When the operation of the air conditioner is started, the outdoor unit control means 9
Is the number of revolutions N set in the driving means 4 of the DC motor.1Luck in
Signal to turn. Thereby, the DC motor 3
And the axial fan 2 rotates to cool the heat exchanger 1
You. In the cooled heat exchanger 1, frost formation progresses, and the communication of the outdoor unit is performed.
Wind resistance increases. The DC motor 3 rotates with this load fluctuation
Although the number decreases, the driving means 4 for the DC motor
3, the operating current is increased, and the set rotational speed N1Keep
Is controlled as follows. (FIG. 3a) Current control means 7
The current value I output from the detecting means 6 and the preset current
Value I1, I2, I3And I ≧ IThreeRelationship
When standing, I <ITwoDrives the signal of rotation speed reduction until
Transmit to means 4. During the heating operation, frost formation progresses and the outdoor unit
Since the ventilation resistance of the current controller continues to increase, the current control means 7
Repeat the operation and the DC motor speed gradually decreases
(Fig. 3b). On the other hand, the rotation speed determining means 8
The rotational speed N output from the detecting means 4 and a preset defrosting
Start rotation speed N2And N ≦ N2Holds
Then, the heat exchanger 1 is clogged by frost and the heat exchange capacity is low.
Operation of the outdoor unit is excluded from the heating operation.
Switch to frost operation. Next, when the defrosting operation proceeds, the heat exchanger 1
As the amount of frost on the outdoor unit decreased, the ventilation resistance of the outdoor unit also decreased.
At times, the operating current I of the DC motor also decreases. Current control means
7 is I <I1Is set by the outdoor unit control means 9
Revolution N 1A signal is transmitted to the driving means 4 so as to operate with
You. Defrosting start rotation speed N2DC motor
The rotation speed is the set rotation speed N1Try to rise up.
However, the frost that had formed on the heat exchanger was thawed and defrosting was completed.
If not, the ventilation resistance of the outdoor unit is sufficiently reduced.
I ≧ IThreeAnd the current control means 7
Signals the drive means 4 to decrease the rotation speed of the DC motor by ΔN.
Signal and I <I TwoContinue to communicate until Further
If the defrosting operation proceeds, the ventilation resistance of the outdoor unit will decrease.
Again I <I1Is established, and the rotation speed of the DC motor is
Set rotation speed N1Try to rise again. Current
The control means 7 repeats the above operation, and controls the DC motor 3.
The rotation speed gradually increases (FIG. 3c). Meanwhile, rotation
The number judging means 8 determines the rotation output from the rotation number detecting means 4.
Number N and preset defrosting end rotation speed N3And N
≧ N3Is established, the frost that has formed on the heat exchanger is completely
The outdoor unit judges that it has completely melted and that defrosting has been completely completed.
Is switched from the defrosting operation to the heating operation. FIG. 4 shows the second
The configuration of the outdoor unit of the air conditioner in the embodiment of
Therefore, the outdoor unit of this embodiment includes the heat exchanger 1 and the axial fan 2.
In addition, a drive that has a DC motor 3 and drives the DC motor
Means 4 and a rotation speed detecting means for detecting the rotation speed of the DC motor.
A stage 5 and a current detecting means 6 for detecting a current value of the DC motor
And the current value output from the current detecting means is set in advance.
Control the DC motor speed so that the current value is not exceeded
The current control unit 7 and the rotation detected by the rotation speed detection unit
The number of rotations and the preset defrost start rotation speed and end rotation speed
And a rotational speed determination means 8 for comparison. Outdoor control means 9
Means current control means 7, rotation number determination means 8 and air blowing operation
Value of the DC motor and the start of defrosting of the rotation speed judging means 8
Data showing the correlation between the rotation speed and the end rotation speed
It has a stored data table 10a. Smell above
Before starting the heating operation of the air conditioner,
The air blowing operation is performed only by the
Using the current value, the current value I1, I2, I3
And defrost start rotation speed N of rotation speed determination means2And end rotation
Number N 3Are determined from the data table 10a. FIG.
Shows the configuration of the outdoor unit of the air conditioner in the third embodiment.
Heat exchanger 1, axial fan 2 and DC motor
A driving means 4 for driving a DC motor,
A rotation speed detecting means 5 for detecting the rotation speed of the C motor;
Current detecting means 6 for detecting a current value of the motor;
The current value output from the means exceeds the preset current value
Current control means for controlling the number of rotations of the DC motor so that there is no
7 and the number of revolutions detected by the number of revolutions detection means and preset
Rotation comparing the defrost start rotation speed and end rotation speed
Number determining means 8. The outdoor control means 9 is a current control means.
Step 7, the rotation speed determination means 8 and the DC mode
Rotation speed of the motor and the defrost start rotation speed of the rotation speed determination means 8 and
Data that stores data showing the correlation with the end rotation speed
The table 10b is provided. In the above, the air conditioner
Before starting the heating operation, the axial fan 2 and the DC
The blow operation is performed only by the axial blower 3
Current control using the rotation speed output from the rotation speed detection means
Current value of means I1, I2, I3And defrosting of rotation speed judgment means
Start rotation speed N2And end rotation speed N3And the data
Bull 10b.
【００１５】以上のように、回転数検出手段から出力さ
れた回転数と回転数判定手段の除霜開始回転数ならびに
終了回転数とを比較することで正確な着霜を判定でき、
かつ熱交換器に着霜した霜を確実に取り除くことができ
る。よって、熱交換能力の低下を防ぎ、良好な暖房運転
が可能となる。また、電流制御手段によりＤＣモータな
らびに駆動手段の運転電流を制限すれば、ＤＣモータな
らびに駆動手段の小型化、低コスト化が可能となる。さ
らに、暖房運転前の熱交換器の目詰まり状態を把握する
ことができ、着霜以外の目詰まりの影響を無視した状態
で熱交換器の着霜をより正確に判定することが可能とな
る。 さらに、上記送風運転の回転数が異常低下した場
合は暖房運転を開始せず、室外熱交換器の目詰まり異常
を使用者に表示することも可能である。As described above, accurate frost formation can be determined by comparing the rotation speed outputted from the rotation speed detection means with the defrost start rotation speed and the end rotation speed of the rotation speed determination means.
In addition, frost formed on the heat exchanger can be reliably removed. Therefore, a decrease in heat exchange capacity is prevented, and a good heating operation can be performed. Further, if the operating current of the DC motor and the driving means is limited by the current control means, the size and cost of the DC motor and the driving means can be reduced. Further, it is possible to grasp the clogged state of the heat exchanger before the heating operation, and it is possible to more accurately determine the frost formation of the heat exchanger while ignoring the influence of clogging other than frost formation. . Further, when the rotation speed of the air blowing operation is abnormally reduced, the heating operation is not started, and it is also possible to display the clogging abnormality of the outdoor heat exchanger to the user.
【００１６】[0016]
【発明の効果】以上述べたように本発明によれば、正確
に着霜が判定でき、かつ熱交換器に着霜した霜を確実に
取り除くことができる空気調和機の室外機を得ることが
できる。As described above, according to the present invention, it is possible to obtain an outdoor unit of an air conditioner capable of accurately determining frost formation and reliably removing frost formed on the heat exchanger. it can.
【図１】本発明の一実施の形態である空気調和機の室外
機の構成。FIG. 1 is a configuration of an outdoor unit of an air conditioner according to an embodiment of the present invention.
【図２】一実施の形態による制御フローチャート。FIG. 2 is a control flowchart according to one embodiment.
【図３】一実施の形態による暖房運転時のＤＣモータ電
流値ならびに回転数の変化を示すグラフ。FIG. 3 is a graph showing changes in a DC motor current value and a rotation speed during a heating operation according to one embodiment.
【図４】本発明の他の実施の形態である空気調和機の室
外機の構成図。FIG. 4 is a configuration diagram of an outdoor unit of an air conditioner according to another embodiment of the present invention.
【図５】本発明のさらに他の実施の形態である空気調和
機の室外機の構成図。FIG. 5 is a configuration diagram of an outdoor unit of an air conditioner according to still another embodiment of the present invention.
１…熱交換器、２…軸流ファン、３…ＤＣモータ、４…
駆動手段、５…回転数検出手段、６…電流検出手段、７
…電流制御手段、８…回転数判定手段、９…室外機制御
手段、１０ａ、１０ｂ…データテーブル。DESCRIPTION OF SYMBOLS 1 ... Heat exchanger, 2 ... Axial flow fan, 3 ... DC motor, 4 ...
Driving means, 5 ... rotation speed detecting means, 6 ... Current detecting means, 7
... current control means, 8 ... rotation number determination means, 9 ... outdoor unit control means, 10a, 10b ... data tables.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 奥園 秀樹 静岡県清水市村松390番地 株式会社日立 空調システム清水生産本部内 (72)発明者 牧野 宏彦 静岡県清水市村松390番地 日立清水エン ジニアリング株式会社内 (72)発明者 岡部 眞幸 静岡県清水市村松390番地 日立清水エン ジニアリング株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Okuzono 390 Muramatsu, Shimizu-shi, Shizuoka Pref.Hitachi Air Conditioning Systems Shimizu Production Headquarters (72) Inventor Hirohiko Makino 390 Muramatsu, Shimizu-shi Shizuoka Hitachi Engineering (72) Inventor Masayuki Okabe 390 Muramatsu, Shimizu-shi, Shizuoka Pref.Hitachi Shimizu Engineering Co., Ltd.
Claims (5)
送風機と、を備えた空気調和機の室外機において、 前記ＤＣモータの回転数を検出する回転数検出手段を備
え、予め前記ＤＣモータの回転数と、前記熱交換器の着
霜量と、の関係より除霜開始回転数と除霜終了回転数を
定め、前記回転数検出手段により検出される回転数が前
記除霜開始回転数以下になると除霜を開始し、前記除霜
終了回転数以上になると除霜を終了することを特徴とし
た空気調和機の室外機。1. An outdoor unit of an air conditioner comprising a heat exchanger and an axial blower driven by a DC motor, comprising: a rotational speed detecting means for detecting a rotational speed of the DC motor; From the relationship between the number of rotations of the DC motor and the amount of frost on the heat exchanger, the number of rotations for starting defrosting and the number of rotations for ending defrosting are determined. An outdoor unit of an air conditioner, wherein defrosting is started when the rotation speed is equal to or lower than the rotation speed, and is ended when the rotation speed is equal to or higher than the rotation speed at which the defrosting is completed.
ＤＣモータの電流値を検出する電流検出手段と、送風運
転時の電流値と前記除霜開始回転数及び除霜終了回転数
との関係を示したデータテーブルと、を備え、 暖房運転前に送風運転を行い、前記電流検出手段により
検出された前記ＤＣモータの電流値と、前記データテー
ブルと、に基づいて前記除霜開始回転数及び除霜終了回
転数を決定することを特徴とする空気調和機の室外機。2. The apparatus according to claim 1, further comprising: a current detecting means for detecting a current value of the DC motor; and a current value at the time of the air blowing operation and the defrost start rotation speed and the defrost end rotation speed. A data table showing the relationship, performing a blowing operation before the heating operation, and the defrost start rotation speed based on the current value of the DC motor detected by the current detecting means and the data table. An outdoor unit for an air conditioner, wherein the outdoor unit determines a rotation speed at which defrosting ends.
ＤＣモータの電流値を検出する電流検出手段と、前記電
流検出手段により検出される電流値が予め設定された電
流値を超えないように前記ＤＣモータの回転数を制御す
る電流制御手段と、送風運転時の電流値と前記予め設定
された電流値との関係を示したデータテーブルと、を備
え、 暖房運転前に送風運転を行い、前記電流検出手段により
検出された前記ＤＣモータの電流値と、前記データテー
ブルと、に基づいて前記予め設定された電流値を決定す
ることを特徴とした空気調和機の室外機。3. The DC motor according to claim 1, wherein said current detection means detects a current value of said DC motor, and a current value detected by said current detection means does not exceed a preset current value. Current control means for controlling the number of rotations of the DC motor, and a data table showing the relationship between the current value during the blowing operation and the preset current value, performing the blowing operation before the heating operation An outdoor unit for an air conditioner, wherein the preset current value is determined based on the current value of the DC motor detected by the current detection means and the data table.
運転時の回転数と除霜開始回転数及び除霜終了回転数と
の関係を示したデータテーブルを備え、 暖房運転前に送風運転を行い、前記回転数検出手段から
検出された前記ＤＣモータの回転数と、前記データテー
ブルと、に基づいて前記除霜開始回転数及び除霜終了回
転数を決定することを特徴とする空気調和機の室外機。4. The air conditioner according to claim 1, further comprising a data table indicating a relationship between a rotation speed during a blowing operation, a defrost start rotation speed, and a defrost end rotation speed, wherein the air blowing operation is performed before the heating operation. And determining the defrost start rotation speed and the defrost end rotation speed based on the rotation speed of the DC motor detected by the rotation speed detection means and the data table. Machine outdoor unit.
ＤＣモータの電流値を検出する電流検出手段と、前記電
流検出手段により検出される電流値が予め設定された電
流値を超えないように前記ＤＣモータの回転数を制御す
る電流制御手段と、送風運転時の回転数と前記予め設定
された電流値との関係を示したデータテーブルと、を備
え、 暖房運転前に送風運転を行い、前記回転数検出手段から
検出された前記ＤＣモータの回転数と、前記データテー
ブルと、に基づいて前記予め設定された電流値を決定す
ることを特徴とした空気調和機の室外機。5. A current detecting device according to claim 1, wherein said current detecting means detects a current value of said DC motor, and a current value detected by said current detecting means does not exceed a preset current value. Current control means for controlling the number of rotations of the DC motor, and a data table showing the relationship between the number of rotations during the blowing operation and the preset current value, performing the blowing operation before the heating operation An outdoor unit for an air conditioner, wherein the preset current value is determined based on the rotation speed of the DC motor detected by the rotation speed detection means and the data table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001150259A JP4548815B2 (en) | 2001-05-21 | 2001-05-21 | Air conditioner outdoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001150259A JP4548815B2 (en) | 2001-05-21 | 2001-05-21 | Air conditioner outdoor unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002340451A true JP2002340451A (en) | 2002-11-27 |
| JP4548815B2 JP4548815B2 (en) | 2010-09-22 |
Family
ID=18995299
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001150259A Expired - Fee Related JP4548815B2 (en) | 2001-05-21 | 2001-05-21 | Air conditioner outdoor unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4548815B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807113A (en) * | 2015-04-30 | 2015-07-29 | 广东美的暖通设备有限公司 | Air conditioner outdoor unit, air conditioner outdoor unit defrosting judging system and air conditioner outdoor unit defrosting judging method |
| CN108397870A (en) * | 2018-02-14 | 2018-08-14 | 青岛海尔空调器有限总公司 | Indoor unit anti-freeze control method and air conditioner for air conditioner |
| EP3502598A1 (en) * | 2017-12-19 | 2019-06-26 | Vestel Elektronik Sanayi ve Ticaret A.S. | Method and apparatus for defrosting a refrigeration apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017179165A1 (en) | 2016-04-14 | 2017-10-19 | 三菱電機株式会社 | Refrigeration cycle device |
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| JPH08271099A (en) * | 1995-03-31 | 1996-10-18 | Mitsubishi Heavy Ind Ltd | Heat pump type air conditioner |
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| JPS6446530A (en) * | 1987-08-10 | 1989-02-21 | Daikin Ind Ltd | Air conditioner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807113A (en) * | 2015-04-30 | 2015-07-29 | 广东美的暖通设备有限公司 | Air conditioner outdoor unit, air conditioner outdoor unit defrosting judging system and air conditioner outdoor unit defrosting judging method |
| CN104807113B (en) * | 2015-04-30 | 2017-11-10 | 广东美的暖通设备有限公司 | A kind of air conditioner outdoor machine defrosting decision method |
| EP3502598A1 (en) * | 2017-12-19 | 2019-06-26 | Vestel Elektronik Sanayi ve Ticaret A.S. | Method and apparatus for defrosting a refrigeration apparatus |
| CN108397870A (en) * | 2018-02-14 | 2018-08-14 | 青岛海尔空调器有限总公司 | Indoor unit anti-freeze control method and air conditioner for air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4548815B2 (en) | 2010-09-22 |
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