JPH04281159A - Refrigerating plant - Google Patents
Refrigerating plantInfo
- Publication number
- JPH04281159A JPH04281159A JP4178691A JP4178691A JPH04281159A JP H04281159 A JPH04281159 A JP H04281159A JP 4178691 A JP4178691 A JP 4178691A JP 4178691 A JP4178691 A JP 4178691A JP H04281159 A JPH04281159 A JP H04281159A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- compressor
- operating frequency
- motor
- refrigerant pipe
- 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.)
- Pending
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 7
- 238000005057 refrigeration Methods 0.000 claims description 26
- 238000010276 construction Methods 0.000 abstract 1
- 230000004913 activation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、圧縮機の駆動用電動
機への運転周波数を制御する制御器を備えた冷凍装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system equipped with a controller for controlling the operating frequency of a motor for driving a compressor.
【０００２】0002
【従来の技術】この種の冷凍装置の従来技術としては、
特公昭６２−３２３８３号公報に記載されたものがある
。[Prior Art] The conventional technology for this type of refrigeration equipment is as follows:
There is one described in Japanese Patent Publication No. 62-32383.
【０００３】この冷凍装置は、圧縮機と凝縮器と減圧器
と蒸発器とを冷媒管で接続した冷媒回路と、圧縮機の駆
動用電動機への運転周波数を制御する制御器とを備え、
圧縮機の回転速度を制御している。This refrigeration system includes a refrigerant circuit in which a compressor, a condenser, a pressure reducer, and an evaporator are connected through refrigerant pipes, and a controller that controls the operating frequency of the motor for driving the compressor.
Controls the rotation speed of the compressor.
【０００４】0004
【発明が解決しようとする課題】前述した冷凍装置等で
は、起動時には、制御器によって最低運転周波数から徐
々に運転周波数を上昇させるように制御することが一般
的である。SUMMARY OF THE INVENTION In the above-mentioned refrigeration equipment, etc., at the time of startup, the operating frequency is generally controlled by a controller so as to gradually increase the operating frequency from the lowest operating frequency.
【０００５】しかし、このような冷凍装置では、圧縮機
と冷媒管とが激しく振動する共振周波数が前記最低運転
周波数より少し高いことがあり、このような場合は、運
転周波数が前記共振周波数を通過するため、冷凍装置に
おける振動や騒音が大きいという欠点がある。However, in such a refrigeration system, the resonant frequency at which the compressor and refrigerant pipe violently vibrate may be slightly higher than the minimum operating frequency, and in such cases, the operating frequency may exceed the resonant frequency. Therefore, there is a drawback that vibration and noise in the refrigeration equipment are large.
【０００６】この発明は、起動時における大きな振動や
騒音を避けられる冷凍装置を提供するものである。[0006] The present invention provides a refrigeration system that can avoid large vibrations and noises during startup.
【０００７】[0007]
【課題を解決するための手段】この発明は、圧縮機と凝
縮器と減圧器と蒸発器とを冷媒管で接続した冷媒回路と
、圧縮機の駆動用電動機に供給する運転周波数を変換す
るための周波数変換手段を有する制御器とを備えた冷凍
装置において、前記制御器には、電動機の起動時に周波
数変換手段で変換された運転周波数を圧縮機と冷媒管と
の共振周波数より高く設定する起動手段を設けたもので
ある。[Means for Solving the Problems] The present invention provides a refrigerant circuit in which a compressor, a condenser, a pressure reducer, and an evaporator are connected by refrigerant pipes, and a system for converting the operating frequency supplied to the drive motor of the compressor. A refrigeration system comprising: a controller having a frequency conversion means, the controller having a startup function that sets the operating frequency converted by the frequency conversion means to be higher than the resonant frequency of the compressor and refrigerant pipes when starting the electric motor; This means that a means has been established.
【０００８】[0008]
【作用】この冷凍装置では、制御器には、電動機の起動
時に周波数制御手段で変換された運転周波数を圧縮機と
冷媒管との共振周波数より高く設定する起動手段を設け
ているので、起動時に電動機は共振周波数を避けた運転
周波数で駆動され、電動機は振動や騒音の激しい前記共
振周波数を通過しない。[Function] In this refrigeration system, the controller is equipped with a starting means that sets the operating frequency converted by the frequency control means higher than the resonant frequency of the compressor and refrigerant pipe when starting the electric motor. The electric motor is driven at an operating frequency that avoids the resonant frequency, and the electric motor does not pass through the resonant frequency where vibrations and noise are severe.
【０００９】[0009]
【実施例】この発明の実施例を図面に基づいて説明する
。[Embodiment] An embodiment of the present invention will be explained based on the drawings.
【００１０】図１において、１は分離型空気調和機等の
冷凍装置で室内ユニットＡと、室外ユニットＢと、両ユ
ニットを結ぶユニット間配管２とから構成されている。
室内ユニットＡには蒸発器３が内蔵されている。In FIG. 1, reference numeral 1 denotes a refrigeration system such as a separate air conditioner, which is composed of an indoor unit A, an outdoor unit B, and an inter-unit pipe 2 that connects the two units. The indoor unit A has a built-in evaporator 3.
【００１１】一方、室外ユニットＢにはアキュームレー
タ４と、圧縮機５と、凝縮器６と減圧器７とが内蔵され
ている。そして冷房運転時に例えば電源周波数を１５Ｈ
ｚ〜１５０Ｈｚに可変できる周波数変換手段８からの入
力で圧縮機５の回転速度を変えて、冷房能力を可変させ
ることができる。ここで１５Ｈｚが圧縮機５の運転可能
な最低周波数ｆ０であり、１５０Ｈｚが圧縮機５の運転
可能な最高周波数ｆ５である。On the other hand, the outdoor unit B includes an accumulator 4, a compressor 5, a condenser 6, and a pressure reducer 7. For example, the power frequency is set to 15H during cooling operation.
The cooling capacity can be varied by changing the rotational speed of the compressor 5 using the input from the frequency converting means 8 which can be varied from 100 Hz to 150 Hz. Here, 15 Hz is the lowest frequency f0 at which the compressor 5 can be operated, and 150 Hz is the highest frequency f5 at which the compressor 5 can be operated.
【００１２】尚、圧縮機５と凝縮器６と減圧器７と蒸発
器３とを冷媒管３０や配管２で接続して冷媒回路３１を
構成している。Note that a refrigerant circuit 31 is constructed by connecting the compressor 5, condenser 6, pressure reducer 7, and evaporator 3 through refrigerant pipes 30 and piping 2.
【００１３】前記周波数変換手段８は主にインバーター
主回路９と圧縮機駆動回路１０とベース駆動回路１１と
から構成されている。The frequency conversion means 8 mainly comprises an inverter main circuit 9, a compressor drive circuit 10, and a base drive circuit 11.
【００１４】１２は室内ユニットＡの制御装置１３から
の周波数指令信号を入力する入力回路、１４は１チップ
のマイクロコンピュータを用いた起動手段、１５は電動
機１６のローターに取付けられたディスク、１７はこの
ディスクに取付けられた磁石を検出する磁気検出センサ
で、このセンサからの信号は前記起動手段１４に入力さ
れる。12 is an input circuit for inputting a frequency command signal from the control device 13 of the indoor unit A; 14 is a starting means using a one-chip microcomputer; 15 is a disk attached to the rotor of the electric motor 16; A magnetic detection sensor detects a magnet attached to this disk, and a signal from this sensor is input to the activation means 14.
【００１５】尚、周波数変換手段８と起動手段１４と入
力回路１２とで圧縮機用の制御器１８を構成している。Note that the frequency conversion means 8, the starting means 14, and the input circuit 12 constitute a controller 18 for the compressor.
【００１６】前記起動手段１４は、圧縮機５の起動時に
は、圧縮機５と冷媒管３０とが共振する共振周波数ｆ１
［例えば１７〜１８Ｈｚ］より高い周波数ｆ２［２０Ｈ
ｚ］の電圧を周波数変換手段８に圧縮機５の電動機１６
に印加させるものである。The starting means 14 operates at a resonant frequency f1 at which the compressor 5 and the refrigerant pipe 30 resonate when starting the compressor 5.
[For example, 17 to 18 Hz] higher frequency f2 [20H
z] to the frequency conversion means 8 to the electric motor 16 of the compressor 5.
is applied.
【００１７】また、この起動手段１４は、印加電圧／周
波数の比を所定時間ｔ１、例えば１００秒間は一定に保
ち、この後は前記比を一定あるいは可変制御する。The starting means 14 also keeps the applied voltage/frequency ratio constant for a predetermined time t1, for example 100 seconds, and thereafter controls the ratio to be constant or variable.
【００１８】そして、この起動手段１４は前記１００秒
経過後は、運転周波数が高いとき、例えば５０Ｈｚ以上
のときは印加電圧／周波数の比を一定制御のままにする
と共に運転周波数の制御速度を１Ｈｚ／０．５秒のまま
とし、運転周波数が低いとき、例えば５０Ｈｚ未満のと
きは前記比を可変制御すると共に運転周波数の制御速度
を１Ｈｚ／３秒とする。After the 100 seconds have elapsed, when the operating frequency is high, for example, 50 Hz or higher, the starting means 14 keeps the applied voltage/frequency ratio constant and controls the operating frequency control speed to 1 Hz. /0.5 seconds, and when the operating frequency is low, for example less than 50 Hz, the ratio is variably controlled and the control speed of the operating frequency is set to 1 Hz/3 seconds.
【００１９】更にまた、前記起動手段１４は、前記比を
可変制御する場合は図３に示すフローチャートに従って
動作する。Furthermore, the starting means 14 operates according to the flowchart shown in FIG. 3 when the ratio is variably controlled.
【００２０】尚、図３には、周波数を制御する動作は示
していない。前記起動手段１４は、印加電圧／周波数の
制御量より負荷判断を行ない、最小とする周波数ｆ４を
決定し、この最小とする周波数ｆ４以上の運転周波数で
圧縮機５の電動機１６を駆動する。Note that FIG. 3 does not show the operation of controlling the frequency. The starting means 14 judges the load based on the applied voltage/frequency control amount, determines the minimum frequency f4, and drives the motor 16 of the compressor 5 at an operating frequency equal to or higher than the minimum frequency f4.
【００２１】このように構成された冷凍装置１では次に
説明するように動作する。まず最初に、起動手段１４か
らの信号により周波数変換手段８が共振周波数ｆ１［１
７〜１８Ｈｚ］より高い周波数ｆ２［２０Ｈｚ］で圧縮
機５の電動機１６を起動させる。The refrigeration system 1 thus constructed operates as described below. First of all, the frequency converting means 8 is activated by the signal from the starting means 14 at the resonant frequency f1[1
The electric motor 16 of the compressor 5 is started at a frequency f2 [20 Hz] higher than the frequency f2 [20 Hz].
【００２２】前記周波数ｆ２は圧縮機５と冷媒管３０の
共振周波数ｆ１［１７〜１８Ｈｚ］より大きな２０Ｈｚ
であるため、印加電圧／周波数の値を一定に保ちながら
周波数を上昇させると、圧縮機５の運転周波数は前記共
振周波数ｆ１を通過しない。The frequency f2 is 20 Hz, which is higher than the resonance frequency f1 [17 to 18 Hz] of the compressor 5 and the refrigerant pipe 30.
Therefore, if the frequency is increased while keeping the value of applied voltage/frequency constant, the operating frequency of the compressor 5 will not pass the resonance frequency f1.
【００２３】このため、圧縮機５と冷媒管３０とが共振
により振動することや振動に伴ない生ずる騒音を防止す
ることができる。[0023] Therefore, it is possible to prevent the compressor 5 and the refrigerant pipe 30 from vibrating due to resonance and the noise generated due to the vibration.
【００２４】また、印加電圧／周波数の値を一定に保っ
ていた１００秒間の制御中は電動機１６の運転周波数を
、周波数ｆ３以上の周波数に設定することによって、周
波数ｆ３より低い周波数で圧縮機５を運転することを制
限する。Furthermore, during the 100 seconds of control in which the applied voltage/frequency value is kept constant, the operating frequency of the motor 16 is set to a frequency higher than the frequency f3, so that the compressor 5 is operated at a frequency lower than the frequency f3. Restrict driving.
【００２５】このように、圧縮機５の運転周波数を一定
時間、周波数ｆ３以上に制御されると、凝縮器６内に冷
媒が必要量溜まり込む時間や、凝縮器６と蒸発器３との
差圧が生ずる時間もとれ、起動時における過渡的で冷媒
の不安定な状態において、圧縮機５の運転周波数を下げ
るような望ましくない制御が回避される。In this way, when the operating frequency of the compressor 5 is controlled to be higher than the frequency f3 for a certain period of time, the time required for the refrigerant to accumulate in the condenser 6 and the difference between the condenser 6 and the evaporator 3 are reduced. It takes time for the pressure to build up, and undesirable control such as lowering the operating frequency of the compressor 5 in a transient and unstable state of the refrigerant at startup is avoided.
【００２６】更にまた、この冷凍装置においては、１０
０秒が経過すると次のように動作する。Furthermore, in this refrigeration system, 10
When 0 seconds have elapsed, the following operation occurs.
【００２７】起動手段１４は印加電圧／周波数の比を一
定に保っていた制御から、前記比を一定にする制御ある
いは可変させる制御を行なう。The starting means 14 performs control to keep the ratio of applied voltage/frequency constant, and to control to keep the ratio constant or to vary it.
【００２８】前記起動手段１４は、運転周波数が高いと
き、例えば５０〜１５０Ｈｚのときは、運転周波数の制
御速度を１Ｈｚ／０．５秒のままとし、運転周波数が低
いとき、例えば１５〜５０Ｈｚのときは運転周波数の制
御速度を１Ｈｚ／３秒とする。When the operating frequency is high, for example from 50 to 150 Hz, the starting means 14 keeps the operating frequency control speed at 1 Hz/0.5 seconds, and when the operating frequency is low, for example from 15 to 50 Hz. In this case, the control speed of the operating frequency is set to 1Hz/3 seconds.
【００２９】起動手段１４が特に周波数が低いときに制
御速度を１Ｈｚ／３秒と制御速度を遅くする理由は、運
転周波数が低く、例えば１５〜５０Ｈｚであれば冷凍装
置の制御が安定していると判断できるため運転周波数の
制御速度を速くする必要がなく、しかも、このような状
態では制御速度が１Ｈｚ／０．５秒のように速いと冷凍
装置１における制御が追随できないからである。The reason why the starting means 14 slows down the control speed to 1 Hz/3 seconds when the frequency is particularly low is that the control of the refrigeration system is stable when the operating frequency is low, for example 15 to 50 Hz. Because it can be determined that the operating frequency is controlled faster, there is no need to increase the control speed of the operating frequency. Moreover, in such a state, if the control speed is as fast as 1 Hz/0.5 seconds, the control in the refrigeration system 1 cannot follow it.
【００３０】また、例えば１Ｈｚ／５秒等と制御速度を
もっと遅くすると冷凍装置１における制御が遅くなり過
ぎるため、制御が遅くなり過ぎないように運転周波数が
低いときは制御速度を１Ｈｚ／３秒と決めた。Furthermore, if the control speed is made much slower, such as 1 Hz/5 seconds, the control in the refrigeration system 1 will become too slow, so in order to prevent the control from becoming too slow, the control speed should be reduced to 1 Hz/3 seconds when the operating frequency is low. I decided.
【００３１】更に、このように印加電圧／周波数の比を
可変制御することにより、負荷の変化と出力電圧の周波
数変化とのマッチングがスムーズに行なえるようになる
。Further, by variably controlling the applied voltage/frequency ratio in this way, it becomes possible to smoothly match changes in the load with changes in the frequency of the output voltage.
【００３２】また、前記１００秒経過後は、起動手段１
４は印加電圧／周波数の制御量より負荷判断を行ない最
低運転周波数を決定し、この最低とする周波数以上で圧
縮機５の電動機１６を運転する。この具体的な動作を図
３に沿って説明する。[0032] Furthermore, after the 100 seconds have elapsed, the activation means 1
4 determines the minimum operating frequency by determining the load based on the control amount of applied voltage/frequency, and operates the motor 16 of the compressor 5 at a frequency higher than or equal to the minimum operating frequency. This specific operation will be explained along FIG. 3.
【００３３】図３のＶ，Ｖ１，ΔＶは夫々実際の印加電
圧、標準印加電圧、補正印加電圧を示している。V, V1, and ΔV in FIG. 3 indicate the actual applied voltage, standard applied voltage, and corrected applied voltage, respectively.
【００３４】また、Ｎ，Ｎｆは夫々実際の電動機回転数
、目標回転数を示し、ｎ，ｎ０は夫々補正数、基準補正
数、ｆ，ｆ４は夫々実際の運転周波数、設定される最小
運転周波数を示している。Further, N and Nf indicate the actual motor rotation speed and target rotation speed, respectively, n and n0 respectively indicate the correction number and reference correction number, and f and f4 respectively indicate the actual operating frequency and the minimum operating frequency to be set. It shows.
【００３５】まず最初に、ステップ５０で起動手段１４
は実際の印加電圧Ｖを演算し、実際の電動機回転数Ｎを
磁気センサ１７からの信号により算出する。First, in step 50, the activation means 14
calculates the actual applied voltage V and calculates the actual motor rotation speed N based on the signal from the magnetic sensor 17.
【００３６】そして、ステップ５１では実際の電動機回
転数Ｎと目標回転数Ｎｆとを比較し、電動機回転数Ｎが
目標回転数Ｎｆより大きい場合は補正数ｎにｎ−１を代
入し［ステップ５２］、電動機回転数Ｎが目標回転数Ｎ
ｆと同じ場合は補正数ｎはそのままにし［ステップ５３
］、電動機回転数Ｎが目標回転数Ｎｆより小さい場合は
補正数ｎにｎ＋１を代入する［ステップ５４］。Then, in step 51, the actual motor rotation speed N and the target rotation speed Nf are compared, and if the motor rotation speed N is larger than the target rotation speed Nf, n-1 is substituted for the correction number n [Step 52 ], the motor rotation speed N is the target rotation speed N
If it is the same as f, leave the correction number n as is [Step 53
], if the motor rotation speed N is smaller than the target rotation speed Nf, n+1 is substituted for the correction number n [step 54].
【００３７】次に、ステップ５５で不等式、補正数ｎ＞
基準補正数ｎ０が正しいかどうか判別し、正しい場合は
ステップ５６で不等式、実際の運転周波数ｆ＜設定され
た最小運転周波数ｆ４が正しいかどうか判別する。Next, in step 55, the inequality, correction number n>
It is determined whether the reference correction number n0 is correct, and if it is correct, it is determined in step 56 whether the inequality, actual operating frequency f<set minimum operating frequency f4, is correct.
【００３８】不等式、運転周波数ｆ＜設定された最小運
転周波数ｆ４が正しい場合はステップ５７で運転周波数
ｆに設定された最小運転周波数ｆ４を代入し、ステップ
５０に戻る。If the inequality, operating frequency f<the set minimum operating frequency f4 is correct, in step 57 the set minimum operating frequency f4 is substituted for the operating frequency f, and the process returns to step 50.
【００３９】尚、ステップ５５，５６での不等式が正し
くない場合は、ステップ５０に戻る。Note that if the inequalities at steps 55 and 56 are incorrect, the process returns to step 50.
【００４０】フローチャート中の補正数ｎは補正印加電
圧ΔＶに掛けられていてｎΔＶは標準印加電圧Ｖ１に対
する制御量となり、ΔＶを一定に設定しているので補正
数ｎを電圧／周波数の制御量とみなして良い。The correction number n in the flowchart is multiplied by the corrected applied voltage ΔV, and nΔV is the control amount for the standard applied voltage V1. Since ΔV is set constant, the correction number n is the voltage/frequency control amount. It's fine to consider it.
【００４１】そして、この補正数ｎが大きいとき、負荷
は大きく、補正数ｎが小さいとき、あるいはマイナスの
ときは負荷が小さい。When the correction number n is large, the load is large, and when the correction number n is small or negative, the load is small.
【００４２】従来、印加電圧／周波数の比を可変制御す
る場合、負荷に対する電流の変化率が小さいので検知精
度を考慮すると充分正確な負荷判断は望めなかった。Conventionally, when the ratio of applied voltage/frequency is variably controlled, since the rate of change of current with respect to the load is small, sufficiently accurate load judgment cannot be expected in consideration of detection accuracy.
【００４３】また、圧縮機の運転周波数が変化した場合
の過渡的な状態における負荷に対しては、外気温度を検
知して負荷判断を行なう方法でも充分正確な負荷判断が
できなかった。[0043]Furthermore, with respect to the load in a transient state when the operating frequency of the compressor changes, even the method of determining the load by detecting the outside air temperature has not been able to make a sufficiently accurate load determination.
【００４４】しかし、この冷凍装置では、制御手段１４
が印加電圧／周波数の制御量より負荷の大きさを判断を
行なうため、従来のものに比べてより正確な判断が行な
える。However, in this refrigeration system, the control means 14
Since the system determines the magnitude of the load based on the control amount of applied voltage/frequency, more accurate determination can be made compared to conventional systems.
【００４５】しかも、この冷凍装置では前記負荷判断に
合わせて最小運転周波数ｆ４を決定し、この最小運転周
波数ｆ４以上の周波数で圧縮機５の電動機１６を運転す
るので、次に説明するような利点がある。Moreover, in this refrigeration system, the minimum operating frequency f4 is determined in accordance with the load judgment, and the electric motor 16 of the compressor 5 is operated at a frequency higher than this minimum operating frequency f4, so there are advantages as described below. There is.
【００４６】印加電圧／周波数の比を可変する制御を行
なう場合は、運転周波数を急激に低下させると、冷凍装
置内の圧力差は急激には低下せず、実際の値と理論値が
ずれることになり、運転周波数の下げ量が大きい程この
ずれは大きくなる。[0046] When performing control that varies the ratio of applied voltage/frequency, if the operating frequency is suddenly reduced, the pressure difference within the refrigeration equipment will not decrease rapidly, and the actual value and theoretical value may deviate. The larger the amount of reduction in the operating frequency, the larger this deviation becomes.
【００４７】前記最小運転周波数ｆ４を決め、運転周波
数をこの周波数以上にすることにより、運転周波数をあ
る周波数より下げないように制御し、実際の値と理論値
とが大きくずれることのないようにする。By determining the minimum operating frequency f4 and making the operating frequency higher than this frequency, the operating frequency is controlled so as not to fall below a certain frequency, and the actual value and the theoretical value do not deviate greatly. do.
【００４８】このような制御により、この冷凍装置１に
おいては、実際の値と理論値とのずれが小さく、冷凍能
力の過不足が非常に少なく負荷にに見合った運転周波数
で圧縮機５の電動機１６を運転することができる。With such control, in this refrigeration system 1, the deviation between the actual value and the theoretical value is small, and there is very little excess or deficiency in the refrigerating capacity, and the electric motor of the compressor 5 is operated at an operating frequency commensurate with the load. 16 can be driven.
【００４９】[0049]
【発明の効果】以上説明したように、この発明によれば
周波数を制御する制御器には、電動機の起動時に周波数
変換手段で変換された運転周波数を圧縮機と冷媒管との
共振周波数より高く設定する起動手段を設けたので電動
機を前記共振周波数を避けた運転周波数で起動でき、冷
凍装置の起動時における大きな振動やこの振動に伴なう
騒音を防止することができる。As explained above, according to the present invention, the frequency controller has an operating frequency that is converted by the frequency conversion means at the time of starting the electric motor to be higher than the resonant frequency of the compressor and the refrigerant pipe. Since the starting means for setting is provided, the electric motor can be started at an operating frequency that avoids the resonance frequency, and large vibrations at the time of starting the refrigeration system and noise accompanying the vibrations can be prevented.
【図１】この発明を示す冷凍装置の回路図である。FIG. 1 is a circuit diagram of a refrigeration system showing the present invention.
【図２】同冷凍装置における運転周波数を示す説明図で
ある。FIG. 2 is an explanatory diagram showing operating frequencies in the refrigeration system.
【図３】同冷凍装置における制御手段の動作を示すフロ
ーチャートである。FIG. 3 is a flowchart showing the operation of a control means in the refrigeration system.
１ 冷凍装置 ３ 蒸発器 ５ 圧縮機 ６ 凝縮器 ７ 減圧器 ８ 周波数変換手段 １４ 起動手段 １６ 電動機 １８ 制御器 ３０ 冷媒管 ３１ 冷媒回路 1 Refrigeration equipment 3 Evaporator 5 Compressor 6 Condenser 7 Pressure reducer 8 Frequency conversion means 14 Activation means 16 Electric motor 18 Controller 30 Refrigerant pipe 31 Refrigerant circuit
Claims (1)
冷媒管で接続した冷媒回路と、圧縮機の駆動用電動機に
供給する運転周波数を変換するための周波数変換手段を
有する制御器とを備えた冷凍装置において、前記制御器
には、電動機の起動時に周波数変換手段で変換された運
転周波数を圧縮機と冷媒管との共振周波数より高く設定
する起動手段を設けたことを特徴とする冷凍装置。Claim 1: A controller comprising a refrigerant circuit in which a compressor, a condenser, a pressure reducer, and an evaporator are connected by refrigerant pipes, and a frequency conversion means for converting the operating frequency supplied to the motor for driving the compressor. The refrigeration system is characterized in that the controller is provided with a starting means for setting the operating frequency converted by the frequency converting means to be higher than the resonant frequency of the compressor and the refrigerant pipe when starting the electric motor. refrigeration equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4178691A JPH04281159A (en) | 1991-03-07 | 1991-03-07 | Refrigerating plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4178691A JPH04281159A (en) | 1991-03-07 | 1991-03-07 | Refrigerating plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04281159A true JPH04281159A (en) | 1992-10-06 |
Family
ID=12618035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4178691A Pending JPH04281159A (en) | 1991-03-07 | 1991-03-07 | Refrigerating plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04281159A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100508484B1 (en) * | 2003-11-20 | 2005-08-17 | 삼성전자주식회사 | Cooling apparatus and control method thereof |
-
1991
- 1991-03-07 JP JP4178691A patent/JPH04281159A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100508484B1 (en) * | 2003-11-20 | 2005-08-17 | 삼성전자주식회사 | Cooling apparatus and control method thereof |
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