JPH03122459A - Operating controller for refrigerating machine - Google Patents

Operating controller for refrigerating machine

Info

Publication number
JPH03122459A
JPH03122459A JP1261145A JP26114589A JPH03122459A JP H03122459 A JPH03122459 A JP H03122459A JP 1261145 A JP1261145 A JP 1261145A JP 26114589 A JP26114589 A JP 26114589A JP H03122459 A JPH03122459 A JP H03122459A
Authority
JP
Japan
Prior art keywords
output
electric current
compressor
inverter
output voltage
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
Application number
JP1261145A
Other languages
Japanese (ja)
Inventor
Takeshi Murakami
毅 村上
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries 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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP1261145A priority Critical patent/JPH03122459A/en
Publication of JPH03122459A publication Critical patent/JPH03122459A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/02Compressor control
    • F25B2600/021Inverters therefor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE:To shorten the low-frequency start-up period of time for improving the comfort of air conditioning by a method wherein the output voltage vs. output electric current characteristic of an inverter is shifted from an optimum point, where the electric current value becomes minimum, only during low-frequency start-up time period. CONSTITUTION:When a low-frequency command signal is output by a signal output device 51 to output a specified low-frequency for a certain time period after commencement of operation, an output characteristic change device 52 changes the output voltage vs. output electric current characteristic of an inverter 6 so as to shift the electric current value from an optimum value, so that the output electric current is increased from the optimum value, and the increase of the output electric current results in an increase of the heat loss of a compressor 1, causing an increase in the oil temperature. As this increase in the oil temperature accelerates separation of the refrigerant dissolved in the oil, the low-frequency start-up time period required for preventing foaming is shortened, and the normal operation with a high performance quickly takes place. Therefore, the room temperature quickly approaches the set point and the comfort of air conditioning is improved.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、圧縮機の運転周波数をインバータにより調節
するようにした冷凍装置の運転制御装置に係り、特に運
転開始時の空調効果の改善対策に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an operation control device for a refrigeration system in which the operating frequency of a compressor is adjusted by an inverter. Regarding.

(従来の技術) 従来より、例えば特公昭60−18899号公報に開示
される如く、圧縮機の運転周波数をインバータで調節す
るようにした空気調和装置において、空気調和装置の運
転開始直後は、しばらくの間、圧縮機の運転周波数を低
周波数値に制御するとともに、このような低周波数起動
の後は高能力運転に移行することにより、速やかに室温
を設定温度に近付けて、ウオームアツプ時間の短縮を図
ろうとするものは公知の技術である。
(Prior Art) Conventionally, as disclosed in Japanese Patent Publication No. 60-18899, for example, in an air conditioner in which the operating frequency of a compressor is adjusted by an inverter, immediately after the start of operation of the air conditioner, During this period, the compressor operating frequency is controlled to a low frequency value, and after such low frequency startup, the compressor is shifted to high capacity operation, which quickly brings the room temperature close to the set temperature and shortens warm-up time. What attempts to achieve this is a known technique.

(発明が解決しようとする課題) 上記従来のもののように運転開始時の圧縮機の容量を低
く制御することにより、潤滑油中に溶は込んでいる冷媒
によるホーミングのために浦の搬出量が増大し、圧縮機
が油切れを生じて焼付き等の事故が生じるのを防止する
ことはできる。
(Problem to be solved by the invention) By controlling the capacity of the compressor at the start of operation to be low as in the conventional system described above, the amount of water discharged from the ura can be reduced due to homing caused by the refrigerant dissolved in the lubricating oil. It is possible to prevent the compressor from running out of oil and causing accidents such as seizure.

しかしながら、このような低周波数起動の時間は、速暖
2速冷を図るためには、さらに短縮することが好ましい
。しかるに、運転開始時には、圧縮機の潤滑油の温度が
低いので、油中の冷媒が分離されにくいという問題があ
る。すなわち、冷媒を油から速やかに分離した方がホー
ミングの防止という点では好ましいにも拘らず、圧縮機
の運転容量が小さいと油温の上昇が遅れるために、冷媒
がなかなか油から分離されないという矛盾がある。
However, in order to achieve rapid heating and two-speed cooling, it is preferable to further shorten the time for such low frequency activation. However, since the temperature of the lubricating oil in the compressor is low at the start of operation, there is a problem in that the refrigerant in the oil is difficult to separate. In other words, although it is better to quickly separate the refrigerant from the oil in terms of preventing homing, there is a paradox in that if the operating capacity of the compressor is small, the rise in oil temperature is delayed, making it difficult to separate the refrigerant from the oil. There is.

したがって、圧縮機の低周波数起動の短縮を図るのが困
難であった。
Therefore, it has been difficult to shorten the low frequency startup time of the compressor.

本発明は斯かる矛盾点に鑑みてなされたものであり、そ
の目的は、起動時、圧縮機の低周波数運転を維持して油
の搬出量を抑制しながら、油温を速やかに上昇させる手
段を講することにより、圧縮機の低周波数起動の時間を
短縮し、もって、空調の快適性の向上を図ることにある
The present invention has been made in view of such contradictions, and its purpose is to provide a means for quickly raising the oil temperature while maintaining the low frequency operation of the compressor and suppressing the amount of oil discharged at the time of startup. The purpose is to shorten the low frequency startup time of the compressor, thereby improving the comfort of air conditioning.

(課題を解決するための手段) 上記目的を達成するため本発明の解決手段は、装置の立
ち上がり時のみ、インバータの出力電圧を最適点からず
らせ、圧縮機の熱損失を増大させて油温を上昇させるこ
とにある。
(Means for Solving the Problem) In order to achieve the above object, the solution of the present invention shifts the output voltage of the inverter from the optimum point only when the device starts up, increases the heat loss of the compressor, and lowers the oil temperature. It is about raising.

具体的には、第1の解決手段は、第1図に示すように、
圧縮機(1)と、出力電流が最小となる最適点における
出力電圧−出力電流特性に従い上記圧縮機の運転容量を
可変に1週節するインバータ(6)とを備えた冷凍装置
を前提とする。
Specifically, the first solution is as shown in FIG.
A refrigeration system is assumed to be equipped with a compressor (1) and an inverter (6) that variably adjusts the operating capacity of the compressor for one week according to the output voltage-output current characteristics at the optimum point where the output current is minimum. .

そ17て、冷凍装置の運転制御装置として、運転開始時
に、上記インバータ(6)の出力周波数を所定の低周波
数値にするよう指令する低周波数指令信号を出力する信
号出力手段(51)を設けるものとする。
17. As an operation control device for the refrigeration system, there is provided a signal output means (51) for outputting a low frequency command signal for instructing the output frequency of the inverter (6) to be a predetermined low frequency value at the start of operation. shall be taken as a thing.

さらに、該信号出力手段(51)の低周波数指令信号を
受けたときに、一定時間、その低周波数値における出力
電圧−出力電流特性を上記電流値が最小となる最適点か
らずらせるよう変更する出力特性変更手段(52)を設
ける構成と(7たものである。
Further, when a low frequency command signal is received from the signal output means (51), the output voltage-output current characteristic at that low frequency value is changed for a certain period of time so as to be shifted from the optimum point where the current value is minimum. This configuration includes an output characteristic changing means (52) and (7).

第2の解決手段は、上記第1の解決手段における出力特
性変更手段(52)を、出力電圧−出力電流特性を出力
電圧が増大する側にずらせるものとしたことにある。
A second solution is that the output characteristic changing means (52) in the first solution shifts the output voltage-output current characteristic to the side where the output voltage increases.

(作用) 以上の構成により、請求項(1)の発明では、運転開始
直後の所定時間が経過するまでの間、信号出力手段(5
1)により所定の低周波数値を出力するよう低周波数指
令信号が出力されると、出力特性変更手段(52)によ
り、インバータ(6)の出力電圧−出力電流特性が最適
点からずれるよう変更されるので、出力電流が最適点に
おける値から増大し、この出力電流の増大により圧縮機
(1)の熱損失が増大して、油温が上昇する。この油温
の上昇により、油中に溶は込んだ冷媒と浦との分離が促
進されるので、ホーミングを防止するための低周波数起
動の時間が短縮され、能力の高い通常運転に速やかに移
行することにより、室温が速やかに設定温度に近付くこ
とになり、空調の快適性が向上する。
(Function) With the above configuration, in the invention of claim (1), the signal output means (5
1), when a low frequency command signal is output to output a predetermined low frequency value, the output characteristic changing means (52) changes the output voltage-output current characteristic of the inverter (6) so as to deviate from the optimum point. Therefore, the output current increases from the value at the optimum point, and this increase in output current increases the heat loss of the compressor (1), causing the oil temperature to rise. This increase in oil temperature promotes the separation of the refrigerant dissolved in the oil from the ura, reducing the time required for low-frequency startup to prevent homing, and quickly transitioning to high-capacity normal operation. By doing so, the room temperature quickly approaches the set temperature, improving the comfort of the air conditioner.

請求項(2)の発明では、上記請求項(1)の発明にお
いて、出力特性変更手段(52)により、出力電圧−出
力電流特性が出力電圧の増大する側にずれるよう変更さ
れるので、特に電力損失が大きくなって、より圧縮機(
1)の発熱量が大きくなり、低周波数起動の時間がさら
に短縮されることになる。
In the invention of claim (2), in the invention of claim (1), the output characteristic changing means (52) changes the output voltage-output current characteristic so as to shift to the side where the output voltage increases. The power loss increases and the compressor (
The amount of heat generated in step 1) increases, and the time required for low frequency startup is further shortened.

(実施例) 以下、本発明の実施例について、図面に基づき説明する
(Example) Hereinafter, an example of the present invention will be described based on the drawings.

第2図は本発明の実施例に係る暖房専用の空気調和装置
の冷媒配管系統を示し、(])は容量調節機構としての
インバータ(6)により運転容量を可変に調節される圧
縮機、(2)は蒸発器として機能する室外熱交換器、(
3)は冷媒を減圧するためのキャピラリチューブ、(4
)は凝縮器として機能する室内熱交換器、(5)は吸入
冷媒中の液冷媒を分離するためのアキュムレータであっ
て、上記各機器(1)〜(5)は冷媒配管(7)により
冷媒の流通可能に接続されていて、室外空気との熱交換
により得り暖熱を室内空気に付与するようにした冷媒回
路が構成されている。
FIG. 2 shows a refrigerant piping system of an air conditioner exclusively for heating according to an embodiment of the present invention, where ( ) indicates a compressor whose operating capacity is variably adjusted by an inverter (6) serving as a capacity adjustment mechanism; 2) is an outdoor heat exchanger that functions as an evaporator, (
3) is a capillary tube for reducing the pressure of the refrigerant, (4)
) is an indoor heat exchanger that functions as a condenser, (5) is an accumulator for separating the liquid refrigerant in the suction refrigerant, and each of the above devices (1) to (5) is connected to the refrigerant by the refrigerant pipe (7). The refrigerant circuit is configured such that the refrigerant circuit is connected to the refrigerant so that the refrigerant can flow therethrough, and provides warm heat obtained through heat exchange with the outdoor air to the indoor air.

装置の運転時、圧縮機(1)からの吐出冷媒が室内熱交
換器(4)により凝縮された後、キャピラリチューブ(
3)で減圧され、室外熱交換器(2)で蒸発して圧縮機
(1)に戻るように循環することにより、室内の暖房運
転をするようになされている。
During operation of the device, the refrigerant discharged from the compressor (1) is condensed by the indoor heat exchanger (4) and then transferred to the capillary tube (
3), is evaporated in the outdoor heat exchanger (2), and is circulated back to the compressor (1), thereby heating the room.

ここで、装置全体の運転を制御するコントローラ(8)
による運転開始時の制御について第3図に基づき説明す
るに、ステップS1で装置の運転開始時から所定時間が
経過したか否かを判別し、経過していない間は、ステッ
プSコで、所定の低周波数値で運転するよう指令する低
周波数指令信号を出力し、ステップS3で、以下のよう
にして、インバータ(6)から出力される圧縮機(])
駆駆動出出の特性を変更する。
Here, a controller (8) that controls the operation of the entire device
To explain the control at the start of operation based on FIG. 3, in step S1 it is determined whether or not a predetermined time has elapsed since the start of operation of the device. In step S3, the compressor (]) output from the inverter (6) is outputted as follows:
Change the drive output characteristics.

すなわち、インバータ(6)の出力電圧−出力電流特性
は、第3図に示すように、各出力周波数値fl、f2+
 ・・・、fnに対する特性線において、通常運転時は
電流値が最小となる最適点(A+ )。
That is, the output voltage-output current characteristics of the inverter (6) are as shown in FIG.
..., the optimum point (A+) where the current value is minimum during normal operation in the characteristic line for fn.

(A2 ) 、・・・、(An)で設定するようになさ
れているが、この場合だけ意図的に上記最適点(例えば
A2)から出力電圧が増大する側にずれた点(B2)で
設定して、圧縮機(1)への入力電流値■を最適点(A
2)における電流値IAからIBに増大するようになさ
れている。なお、図の点(B2)ではなく、出力電圧が
減小する側の点(B2 ’ )に変更するようにしても
よい。
(A2), ..., (An), but only in this case it is intentionally set at a point (B2) that is shifted from the optimum point (for example, A2) to the side where the output voltage increases. Then, the input current value ■ to the compressor (1) is set to the optimum point (A
The current value increases from the current value IA in 2) to IB. Note that the point (B2') on the side where the output voltage decreases may be changed instead of the point (B2) in the figure.

一方、上記ステップs、、s3の制御を行っている間に
、運転開始時から所定時間が経過すると、ステップS4
に移行して、通常運転の制御によるインバータ(6)の
出力周波数fを指令し、ステップS5で、出力電圧VA
となる標準特性つまり上記第4図の各周波数fl+f2
+ ・・・、fnに対する最適点(A+ )、(A、!
 )、・・・、(An)で出力電圧−出力電流特性を設
定する。
On the other hand, when a predetermined period of time has elapsed from the start of operation while performing the control in steps s, s3, step S4
In step S5, the output frequency f of the inverter (6) under normal operation control is commanded, and in step S5, the output voltage VA is
In other words, each frequency fl+f2 in Fig. 4 above is the standard characteristic.
+..., optimal point (A+) for fn, (A,!
), . . . , (An) to set the output voltage-output current characteristics.

そして、ステップS6で、上記のステップS3又はB5
で設定した出力電圧−出力電流特性に従いインバータ(
6)から圧縮機(1)の駆動信号を出力する。
Then, in step S6, the above step S3 or B5
The inverter (
6) outputs a drive signal for the compressor (1).

上記フローにおいて、ステップS2により、指令信号出
力手段(5コ)が構成され、ステップS3により、出力
特性変更手段(52)が構成されている。
In the above flow, step S2 constitutes the command signal output means (5 pieces), and step S3 constitutes the output characteristic changing means (52).

したがって、上記実施例では、空気調和装置の暖房運転
開始直後の所定時間が経過するまでの間、信号出力手段
(51)により所定の低周波数値(例えばf2)を出力
するよう低周波数指令信号が出力されると、出力特性変
更手段(52)により、インバータ(6)の出力電圧−
出力電流特性が最適点(例えばA、)からずれるよう変
更されるので、出力電流Iが最適点(A2)における値
IAからIBに増大し、この出力電流■の増大により圧
縮機(1)の熱損失が増大して、油温が上昇する。この
油温の上昇により、油中に溶は込んだ冷媒と油との分離
が促進されるので、第5図に示すように、油温が通常運
転に移行可能な所定値Toまで上昇するのに要する時間
、っまりホーミング防止のための予熱運転時間(低周波
数起動の時間)が、最適点制御の場合の値tA (例え
ば5分間程度の時間)からtS  (例えば3分間程度
の時間)に短縮され、通常σUVに速やかに移行するこ
とで、室温を速やかに設定温度に近付けることができる
のである。
Therefore, in the above embodiment, the low frequency command signal is issued so that the signal output means (51) outputs a predetermined low frequency value (for example, f2) until a predetermined period of time has elapsed immediately after the start of heating operation of the air conditioner. When the output voltage is output, the output characteristic changing means (52) changes the output voltage of the inverter (6) to -
Since the output current characteristics are changed to deviate from the optimum point (for example, A), the output current I increases from the value IA at the optimum point (A2) to IB, and this increase in output current Heat loss increases and oil temperature rises. This increase in oil temperature promotes the separation of the refrigerant dissolved in the oil from the oil, so as shown in Figure 5, the oil temperature rises to a predetermined value To that allows transition to normal operation. The preheating operation time (low frequency startup time) to prevent stuck homing changes from the value tA (for example, about 5 minutes) in the case of optimal point control to tS (for example, about 3 minutes). By shortening the temperature and quickly shifting to normal σUV, the room temperature can be quickly brought close to the set temperature.

一方、圧縮機(1)の運転容量はほとんど変化しないの
で、冷媒循環量の増大により油の搬出量の増大を招くこ
とはない。
On the other hand, since the operating capacity of the compressor (1) hardly changes, an increase in the amount of refrigerant circulation does not cause an increase in the amount of oil carried out.

以上により、ホーミング防止の観点から生じる圧縮機(
1)の低容量の維持と、油温の上昇の必要性という相矛
盾する要求を同時に満足することができ、よって、圧縮
機(1)の油不足による焼付き等の事故を防止しながら
、速やかな通常制御の開始により速暖性の向上を図るこ
とができるのである。
As a result of the above, the compressor (
It is possible to simultaneously satisfy the contradictory demands of maintaining a low capacity (1) and the necessity of increasing oil temperature, thereby preventing accidents such as seizure due to lack of oil in the compressor (1). By starting the normal control quickly, it is possible to improve the heating speed.

しかも、電気ヒータ等の別途潤滑油を加熱する手段を設
ける必要がないので、コストの増大を抑制することがで
きる。
Furthermore, since there is no need to provide a separate means for heating the lubricating oil, such as an electric heater, an increase in cost can be suppressed.

また、請求項(2)の発明のように、上記請求項(1)
の発明において、出力電圧−出力電流特性をずらせる点
を第4図中右側の出力電圧を増大する側にずらせるよう
にした場合、特に出力電圧の増大により、電力損失が大
きくなって、より圧縮機(1)の発熱量を大きくするこ
とかでき、よって、著効を発揮することができる。
In addition, like the invention of claim (2), the above claim (1)
In the invention, when the point at which the output voltage-output current characteristic is shifted is shifted to the side where the output voltage increases on the right side in Fig. 4, the power loss increases especially due to the increase in the output voltage. The amount of heat generated by the compressor (1) can be increased, and therefore, significant effects can be exhibited.

なお、上記実施例では暖房運転専用の空気調和装置につ
いて説明したが、冷房運転を行うものにも、上記実施例
と同様に油温を速やかに上昇させることができ、圧縮機
の運転容量を速やかに増大させることができるので、室
内の速冷による空調の快適性の向上を図ることができる
Although the above embodiment describes an air conditioner dedicated to heating operation, it is also possible to quickly raise the oil temperature and increase the operating capacity of the compressor in an air conditioner that performs cooling operation, as in the above embodiment. Therefore, it is possible to improve the comfort of air conditioning by quickly cooling the room.

(発明の効果) 以上説明したように、請求項(1)の発明によれば、イ
ンバータにより圧縮機の運転容量を調節するようにした
冷凍装置において、装置の低周波数起動時のみ、インバ
ータの出力電圧−出力電流特性を電流が最小となる最適
点から意図的にずらせるようにしたので、冷媒循環量を
小さく維持してホーミングを防止しながら、圧縮機の熱
損失の増大により潤滑油温度を上昇させることができ、
よって、低周波数起動時間の短縮による空調の快適性の
向上を図ることができる。
(Effects of the Invention) As explained above, according to the invention of claim (1), in a refrigeration system in which the operating capacity of a compressor is adjusted by an inverter, the output of the inverter is By intentionally shifting the voltage-output current characteristic from the optimum point where the current is minimum, the refrigerant circulation rate is kept small to prevent homing, while the lubricating oil temperature is reduced due to increased compressor heat loss. can be raised,
Therefore, it is possible to improve the comfort of air conditioning by shortening the low frequency activation time.

請求項(′2Jの発明によれば、上記請求項(1)の発
明において、インバータの出力電圧−出力電流特性を出
力電圧が増大する側にずらせるようにしたので、電力損
失の増大により、低周波数起動時間の短縮効果をより顕
著に発揮することができる。
According to the invention of claim ('2J), in the invention of claim (1), the output voltage-output current characteristic of the inverter is shifted to the side where the output voltage increases, so that the power loss increases. The effect of shortening the low frequency startup time can be more significantly exhibited.

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

第1図は本発明の構成を示すブロック図である。 第2図以下は本発明の実施例を示し、第2図は空気調和
装置の冷媒配管系統図、第3図はコントローラの制御内
容を示すフローチャート図、第4図はインバータの出力
電圧−出力電流特性を示す特性図、第5図は油温の上昇
に要する時間の変化を示す特性図である。 1  圧縮機 6  インバータ 51 信号出力手段 52 出力特性変更手段 第1 図
FIG. 1 is a block diagram showing the configuration of the present invention. Figure 2 and the following diagrams show embodiments of the present invention. Figure 2 is a refrigerant piping system diagram of an air conditioner, Figure 3 is a flowchart showing the control details of the controller, and Figure 4 is an inverter output voltage-output current. FIG. 5 is a characteristic diagram showing the change in time required for the oil temperature to rise. 1 Compressor 6 Inverter 51 Signal output means 52 Output characteristic changing means FIG.

Claims (2)

【特許請求の範囲】[Claims] (1)圧縮機(1)と、出力電流が最小となる最適点に
おける出力電圧−出力電流特性に従い上記圧縮機の運転
容量を可変に調節するインバータ(6)とを備えた冷凍
装置において、 運転開始時に、上記インバータ(6)の出力周波数を所
定の低周波数値にするよう指令する低周波数指令信号を
出力する信号出力手段(51)を備えるとともに、 該信号出力手段(51)の低周波数指令信号を受けたと
きに、一定時間、その低周波数値における出力電圧−出
力電流特性を上記電流値が最小となる最適点からずらせ
るよう変更する出力特性変更手段(52)を備えたこと
を特徴とする冷凍装置の運転制御装置。
(1) In a refrigeration system equipped with a compressor (1) and an inverter (6) that variably adjusts the operating capacity of the compressor according to the output voltage-output current characteristics at the optimal point where the output current is minimum, The signal output means (51) outputs a low frequency command signal that commands the output frequency of the inverter (6) to be a predetermined low frequency value at the time of start, and the low frequency command of the signal output means (51) is provided. It is characterized by comprising an output characteristic changing means (52) for changing the output voltage-output current characteristic at the low frequency value for a certain period of time when receiving a signal so as to shift it from the optimal point where the current value is the minimum. Operation control device for refrigeration equipment.
(2)出力特性変更手段(52)は、出力電圧−出力電
流特性を出力電圧が増大する側にずらせるものであるこ
とを特徴とする請求項(1)記載の冷凍装置の運転制御
装置。
(2) The operation control device for a refrigeration system according to claim 1, wherein the output characteristic changing means (52) shifts the output voltage-output current characteristic to a side where the output voltage increases.
JP1261145A 1989-10-05 1989-10-05 Operating controller for refrigerating machine Pending JPH03122459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1261145A JPH03122459A (en) 1989-10-05 1989-10-05 Operating controller for refrigerating machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1261145A JPH03122459A (en) 1989-10-05 1989-10-05 Operating controller for refrigerating machine

Publications (1)

Publication Number Publication Date
JPH03122459A true JPH03122459A (en) 1991-05-24

Family

ID=17357726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1261145A Pending JPH03122459A (en) 1989-10-05 1989-10-05 Operating controller for refrigerating machine

Country Status (1)

Country Link
JP (1) JPH03122459A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018138796A1 (en) * 2017-01-25 2018-08-02 三菱電機株式会社 Refrigeration cycle device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018138796A1 (en) * 2017-01-25 2018-08-02 三菱電機株式会社 Refrigeration cycle device
CN110192070A (en) * 2017-01-25 2019-08-30 三菱电机株式会社 Refrigerating circulatory device
US11486620B2 (en) 2017-01-25 2022-11-01 Mitsubishi Electric Corporation Refrigeration cycle apparatus

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