JPH02267471A - Refrigeration equipment operation control method - Google Patents
Refrigeration equipment operation control methodInfo
- Publication number
- JPH02267471A JPH02267471A JP8483789A JP8483789A JPH02267471A JP H02267471 A JPH02267471 A JP H02267471A JP 8483789 A JP8483789 A JP 8483789A JP 8483789 A JP8483789 A JP 8483789A JP H02267471 A JPH02267471 A JP H02267471A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- set pressure
- range
- pressure range
- inverter
- 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
- Control Of Positive-Displacement Pumps (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、インバータ周波数を制御して運転する冷ｇ装
置において、設定圧力（又は温度）範囲内での周波数を
制御する運転方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operating method for controlling the frequency within a set pressure (or temperature) range in a refrigeration device that operates by controlling the inverter frequency.
従来の制御は、半密閉形圧縮機４載のインバータ冷凍機
に採用しているように設定圧力（又は温度）範囲内にお
いて、上限と下限の間を圧力維持するためにインバータ
周波数をＶｔｒｌＪｆ４する運転方法であった。Conventional control is an operation in which the inverter frequency is set to VtrlJf4 in order to maintain the pressure between the upper and lower limits within the set pressure (or temperature) range, as used in inverter refrigerators equipped with four semi-hermetic compressors. It was a method.
ｇ２１ｊｊＡは従来の運転方法を示し、運転制御される
設定吸入圧力とインバータ周波数の運転変化の状態を示
す。低圧側の負荷条件により設定圧力Ｐｓｂと設定圧力
範囲ΔＰが設定される。冷凍機はこの設定圧力範囲ΔＰ
を維持するように運転を制−する。インバータ周波数は
設定圧力Ｐｓｂ迄は同一の高周波数で運転される。運転
圧力が設定圧力Ｐｓｂより低くなった時点で１ンバ一タ
周波数を下げる。この周波数で設定圧力範囲ΔＰ内に運
転圧力が高くなった時点でその同一周波数で設定圧力範
囲ΔＰ内を運転制御する。この周波数での運転状態が設
定圧力範囲ΔＰの上限Ｐａｂ＋ΔＰを越えると、インバ
ータ周波数は、高くなり設定圧力範囲ΔＰ内に戻すべき
運転制御する。このような運転制−の操返しにより設定
圧力範囲ΔＰを維持するように制御されるものである。g21jjA indicates a conventional operating method, and indicates the state of operating changes in the set suction pressure and inverter frequency that are controlled. The set pressure Psb and the set pressure range ΔP are set depending on the load condition on the low pressure side. The refrigerator is within this set pressure range ΔP
Control driving so as to maintain The inverter frequency is operated at the same high frequency up to the set pressure Psb. When the operating pressure becomes lower than the set pressure Psb, the 1-inverter frequency is lowered. When the operating pressure becomes high within the set pressure range ΔP at this frequency, the operation is controlled within the set pressure range ΔP at the same frequency. When the operating state at this frequency exceeds the upper limit Pab+ΔP of the set pressure range ΔP, the inverter frequency becomes higher and the operation is controlled to return to within the set pressure range ΔP. Control is performed to maintain the set pressure range ΔP by repeating such operation control.
上記従来技術は、設定圧力（又は温度）範囲内での運転
において、範囲の上限と下限の間を維持するようにイン
バータの周波数を制御だけの運転のため、設定圧力範囲
の下限迄運転するため、高い周波数で長時間運転する必
要があり、高い効率を確保する配慮がされておらず省エ
ネ運転の効率が悪くなる問題があった。The above conventional technology operates only by controlling the frequency of the inverter to maintain it between the upper and lower limits of the range when operating within the set pressure (or temperature) range, or to operate up to the lower limit of the set pressure range. , it is necessary to operate at a high frequency for a long time, and there is a problem that the efficiency of energy-saving operation deteriorates because no consideration is given to ensuring high efficiency.
本発明の目的は、設定圧力範囲の上限を維持するため低
周波数で運転制御し、省エネ運転を効率良く行うことに
ある。An object of the present invention is to efficiently perform energy-saving operation by controlling the operation at a low frequency to maintain the upper limit of the set pressure range.
上記目的を達成するために、設定圧力（又は温度）範Ｉ
ＩＪＡ同において、運転周波数を小刻みな幅にて、段階
的に減少させ、出来るだけ低い周ｅ、数にて、設定圧力
ａ−内を運転するようにしたものである。In order to achieve the above purpose, the set pressure (or temperature) range I
In IJA, the operating frequency is reduced step by step in small increments to operate within the set pressure a- at the lowest frequency e and number possible.
冷却負荷条件により、圧力（又は温度）及び圧力範囲幅
が設定される。その設定圧力範囲内を維持しながら運転
制御されるがこの運転制御方法として、設定圧力範囲内
での運転状態を設定した時間を継続した時点で、インバ
ータ周波数を、設定した周波数だけ下げて設定時間運転
する。この運転状態が設定圧力範囲内にある場合は更に
上記制御を繰返し、設定圧力範囲内を低周波数で運転制
御するものである。The pressure (or temperature) and pressure range width are set depending on the cooling load conditions. The operation is controlled while maintaining the set pressure range, but this operation control method is such that when the operating state continues within the set pressure range for the set time, the inverter frequency is lowered by the set frequency and the inverter frequency is lowered for the set time. drive. If this operating state is within the set pressure range, the above control is further repeated, and the operation is controlled at a low frequency within the set pressure range.
以下、本発明の一実施例をＡ１図により説明する。 Hereinafter, one embodiment of the present invention will be described with reference to Figure A1.
第１図は、不発明の一実施例の運転制御方法の吸入圧力
とインバータ周波数の運転状態図ン示す運転状態が設定
圧力範囲ΔＰの上限ｐｓｂ＋ΔＰに入り、設定圧力範囲
ΔＰにある状態が、設定したＡ時間、ｌａ絖するとイン
バータ周波数をＣＨｚ下げる。周波数Ｃ）Ｉｚ減少後、
設定した８時間経過後、まだ設定圧力範囲ΔＰにあれば
更にＣＨｚ下げ、この周波数制御を設定圧力範囲ΔＰの
上限Ｐｓｂ＋ΔＰになる迄繰返す。上限ｐｓｂ＋ΔＰを
越えると周波数を制くし、設定圧力範囲ΔＰ内に戻す。FIG. 1 is a diagram showing the operating state of the suction pressure and inverter frequency of the operation control method according to the embodiment of the invention. When the time A is reached, the inverter frequency is lowered by CHZ. Frequency C) After Iz decreases,
If the set pressure range ΔP is still within the set pressure range ΔP after the set 8 hours have elapsed, the frequency is further lowered and this frequency control is repeated until the set pressure range ΔP reaches the upper limit Psb+ΔP. When the upper limit psb+ΔP is exceeded, the frequency is controlled and returned to within the set pressure range ΔP.
再度、設定圧力範囲ΔＰに入ると設定したＡ時間継続す
ることを条件に上記運転制御を繰返す。Once the set pressure range ΔP is entered again, the above operation control is repeated on the condition that it continues for the set time A.
本実施例によれば、設定圧力範囲（ΔＰ）内に運転状態
があれば、小刻みに周波数を設定圧力範囲の上限になる
迄下げるため、低いインバータ周波数で運転することが
でき、高い運転効率を確保でき省エネ運転を実施するこ
とが可能となる。According to this embodiment, if the operating state is within the set pressure range (ΔP), the frequency is gradually lowered until it reaches the upper limit of the set pressure range, so it is possible to operate at a low inverter frequency and achieve high operating efficiency. This makes it possible to implement energy-saving operation.
本発明によれば、設定圧力範囲内に於いて、範囲内の上
限になる迄、インバータ周波数を下げることにより、必
要な冷却負荷の能力で運転することにより、冷やし過ぎ
運転を防止し、高効率で高い省エネルギー運転となる効
果がある。According to the present invention, within the set pressure range, by lowering the inverter frequency until the upper limit within the range is reached, the inverter frequency is operated at the required cooling load capacity, thereby preventing overcooling operation and achieving high efficiency. This has the effect of highly energy-saving operation.
第１図は従来運転の周波数と吸入圧力の（関係を示す変
化状態図、第２図は本発明の一実施例を示す運転方法の
周波数と吸入圧力の関係を示す変化状態図である。
Ｐｓｂ・・・設定圧力 Δｐｓ・・・設定圧力範囲Ａ
・・・設定範囲内での運転設定時間 Ｂ・・・周波数
減少設定時間 Ｃ・・・減少設定周波数。FIG. 1 is a change diagram showing the relationship between frequency and suction pressure in conventional operation, and FIG. 2 is a change diagram showing the relationship between frequency and suction pressure in an operating method according to an embodiment of the present invention. ...Set pressure Δps...Set pressure range A
... Operation setting time within the setting range B... Frequency reduction setting time C... Decreasing setting frequency.
Claims (1)
、設定圧力（又は温度）範囲内で、同一周波数を維持す
る運転状態が、予め設定した時間を継続した時点で、設
定したインバータ周波数を下げ、この周波数減少後、設
定した時間経過後いまだ設定圧力（又は温度）範囲内に
あれば、更に設定周波数を下げ、設定圧力範囲の上限に
なる迄、上記制御を繰返し、運転することを特徴とする
冷凍装置の運転制御方法。In a refrigeration system that operates under frequency control using an inverter, when the operating state that maintains the same frequency within the set pressure (or temperature) range continues for a preset time, the set inverter frequency is lowered, and after this frequency decrease If the pressure (or temperature) is still within the set pressure range after a set time has elapsed, the set frequency is further lowered and the above control is repeated until the upper limit of the set pressure range is reached. Control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8483789A JP2765934B2 (en) | 1989-04-05 | 1989-04-05 | Operation control method of refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8483789A JP2765934B2 (en) | 1989-04-05 | 1989-04-05 | Operation control method of refrigeration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02267471A true JPH02267471A (en) | 1990-11-01 |
| JP2765934B2 JP2765934B2 (en) | 1998-06-18 |
Family
ID=13841906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8483789A Expired - Lifetime JP2765934B2 (en) | 1989-04-05 | 1989-04-05 | Operation control method of refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2765934B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018009747A (en) * | 2016-07-14 | 2018-01-18 | オリオン機械株式会社 | Control method and device of chiller |
| JP2018009746A (en) * | 2016-07-14 | 2018-01-18 | オリオン機械株式会社 | Chiller control method and apparatus |
| CN110454371A (en) * | 2019-08-19 | 2019-11-15 | 蘑菇物联技术（深圳）有限公司 | A Method of Dynamically Matching the Lower Limit Pressure in Joint Control of Air Compressor Stations |
-
1989
- 1989-04-05 JP JP8483789A patent/JP2765934B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018009747A (en) * | 2016-07-14 | 2018-01-18 | オリオン機械株式会社 | Control method and device of chiller |
| JP2018009746A (en) * | 2016-07-14 | 2018-01-18 | オリオン機械株式会社 | Chiller control method and apparatus |
| CN110454371A (en) * | 2019-08-19 | 2019-11-15 | 蘑菇物联技术（深圳）有限公司 | A Method of Dynamically Matching the Lower Limit Pressure in Joint Control of Air Compressor Stations |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2765934B2 (en) | 1998-06-18 |
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