JPH06323639A - Method for controlling chilled water supplying device - Google Patents
Method for controlling chilled water supplying deviceInfo
- Publication number
- JPH06323639A JPH06323639A JP10839893A JP10839893A JPH06323639A JP H06323639 A JPH06323639 A JP H06323639A JP 10839893 A JP10839893 A JP 10839893A JP 10839893 A JP10839893 A JP 10839893A JP H06323639 A JPH06323639 A JP H06323639A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- condition
- expansion valve
- electronic expansion
- cold water
- 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
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は一定温度の冷水を必要と
するコンピュータ冷却装置や、一般産業用冷水供給装置
に係り、特に、冷凍サイクルの制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer cooling device that requires cold water at a constant temperature and a general industrial cold water supply device, and more particularly to a method for controlling a refrigeration cycle.
【０００２】[0002]
【従来の技術】従来の技術として特開平2−4165 号公報
では発熱体の熱負荷を吸収して冷凍装置に戻ってきた冷
水を冷却するために、インバータにより冷凍サイクルの
冷凍能力を容量制御で、安定した温度の冷水を供給する
ことを可能とする方式が記載されている。2. Description of the Related Art As a conventional technique, in Japanese Patent Laid-Open No. 2-4165, an inverter controls the refrigerating capacity of a refrigerating cycle in order to absorb the heat load of a heating element and cool the chilled water returned to a refrigerating apparatus. , A method that makes it possible to supply cold water at a stable temperature is described.
【０００３】[0003]
【発明が解決しようとする課題】上記技術は、負荷から
戻ってくる戻り冷水温度に基づきインバータの出力周波
数が制御され、その値に応じて圧縮機の運転周波数を制
御し、冷凍サイクルの冷却能力を制御し、負荷との間を
循環する冷水を冷却する方式であるが、本方式ではイン
バータ出力周波数を制御しているが、圧縮機の使用条件
に対し、考慮されておらず、圧縮機の寿命が短くなる問
題がある。In the above technique, the output frequency of the inverter is controlled on the basis of the temperature of the return chilled water returned from the load, the operating frequency of the compressor is controlled according to the value, and the cooling capacity of the refrigeration cycle is controlled. This is a method of cooling the chilled water that circulates between the load and the load.In this method, the inverter output frequency is controlled, but it is not taken into consideration in the usage conditions of the compressor. There is a problem that the life is shortened.
【０００４】本発明の目的は、圧縮機の使用条件を満足
し、かつ安定した冷凍サイクルの制御を行い、安定した
冷水を供給することにある。An object of the present invention is to satisfy the usage conditions of the compressor, to control the refrigeration cycle in a stable manner, and to supply a stable cold water.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、圧縮機の運転状態を監視するための吐出
圧力センサ及び吸入圧力センサ，吐出温度，吸入温度セ
ンサ及び冷水の温度を測定する温度センサにより、圧縮
機の運転状態を監視し、圧縮機の使用条件から電子式膨
張弁を調節する。To achieve the above object, the present invention measures a discharge pressure sensor and a suction pressure sensor for monitoring the operating state of a compressor, a discharge temperature, a suction temperature sensor, and the temperature of cold water. The operating condition of the compressor is monitored by the temperature sensor, and the electronic expansion valve is adjusted according to the usage conditions of the compressor.
【０００６】[0006]
【作用】各センサからの情報から圧縮機の運転状態を判
断し、圧縮機の使用条件を満足させるために電子式膨張
弁を調節する。これにより、圧縮機の使用条件を満たす
ことができ寿命を短くすることは無い。The operation state of the compressor is judged from the information from each sensor, and the electronic expansion valve is adjusted to satisfy the usage condition of the compressor. As a result, the usage conditions of the compressor can be satisfied and the service life is not shortened.
【０００７】[0007]
【実施例】本発明の一実施例を図１より説明する。図１
は本実施例に係る冷水供給装置の系統図である。本冷水
供給装置は圧縮機１，凝縮器２，電子式膨張弁３，蒸発
器４、及びこれらを結ぶ冷媒配管５により冷凍サイクル
が構成されており、蒸発器４で冷却された冷水はポンプ
６，冷水配管７により負荷８へ送水される。制御手段と
して冷水入口温度センサ９，冷水出口温度センサ１０が
設けられ、そこから得られる情報は制御器１１に入力さ
れ、圧縮機１の運転周波数を算出し、インバータ１２よ
り圧縮機１を制御し、冷凍サイクルの冷却の能力を制御
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. Figure 1
FIG. 3 is a system diagram of a cold water supply device according to this embodiment. The refrigerating cycle of this cold water supply device is constituted by the compressor 1, the condenser 2, the electronic expansion valve 3, the evaporator 4, and the refrigerant pipe 5 connecting them, and the cold water cooled by the evaporator 4 is pumped by the pump 6 Water is sent to the load 8 through the cold water pipe 7. A chilled water inlet temperature sensor 9 and a chilled water outlet temperature sensor 10 are provided as control means, and information obtained from them is input to a controller 11, which calculates an operating frequency of the compressor 1 and controls the compressor 1 by an inverter 12. , Control the cooling capacity of the refrigeration cycle.
【０００８】吐出圧力センサ１３，吸入圧力センサ１４
より得られた情報は、制御器１２に入力され圧縮機１の
使用条件が満たされているかどうかを判断する。圧縮機
１の使用条件とは、吸入圧力が１〜７kg／cm2Ｇ、吐出
圧力が１１〜２５kg／cm2Ｇ、圧力比εが１.８〜８ の
間にある必要がある。なお、圧力比εは数１より算出す
る。Discharge pressure sensor 13 and suction pressure sensor 14
The obtained information is input to the controller 12 and it is determined whether the usage conditions of the compressor 1 are satisfied. The usage conditions of the compressor 1 are that the suction pressure is 1 to 7 kg / cm 2 G, the discharge pressure is 11 to 25 kg / cm 2 G, and the pressure ratio ε is between 1.8 and 8. The pressure ratio ε is calculated from the equation 1.
【０００９】[0009]
【数１】 [Equation 1]
【００１０】圧縮機１の運転状態が使用条件より外れて
いる場合、例えば、吸入圧力が低い場合には電子式膨張
弁３の減圧量を小さくして吸入圧力が高くなるようにす
る。また、吸入圧力が高ければ、電子式膨張弁３の減圧
量を多くして吸入圧力を低下させる。When the operating condition of the compressor 1 is out of the operating condition, for example, when the suction pressure is low, the decompression amount of the electronic expansion valve 3 is reduced to increase the suction pressure. If the suction pressure is high, the pressure reduction amount of the electronic expansion valve 3 is increased to reduce the suction pressure.
【００１１】吐出圧力が高い場合には、電子式膨張弁３
の減圧量を小さくし、吐出圧力を下げる様にする。ま
た、吐出圧力が低ければ電子式膨張弁３の減圧量を多く
して吐出圧力が高くなるようにする。When the discharge pressure is high, the electronic expansion valve 3
Decrease the amount of pressure reduction and reduce the discharge pressure. If the discharge pressure is low, the pressure reduction amount of the electronic expansion valve 3 is increased to increase the discharge pressure.
【００１２】圧力比が小さければ電子式膨張弁３の減圧
量を大きくして吐出圧力を高くし、吸入圧力を低くし、
圧力比が高くなるようにする。圧力比が高ければ逆の調
節をし、圧力比を小さくするようにする。If the pressure ratio is small, the decompression amount of the electronic expansion valve 3 is increased to increase the discharge pressure and decrease the suction pressure,
Try to increase the pressure ratio. If the pressure ratio is high, reverse the adjustment to reduce the pressure ratio.
【００１３】電子式膨張弁３を調節して圧縮機１の使用
条件に入るよう冷凍サイクルの調節をする。The electronic expansion valve 3 is adjusted to adjust the refrigeration cycle so that the usage conditions of the compressor 1 are met.
【００１４】条件が満たされていれば電子式膨張弁３を
調節する必要は無いが圧縮機１の使用条件が満たされて
いなければ、その満たされていない状態に合わせて電子
式膨張弁３の減圧量を補正して、圧縮機１の使用条件を
満たす迄行う。冷水温度が高ければ、運転周波数を高く
して冷凍能力を大きくする。そのときに運転周波数に対
応した減圧量に電子式膨張弁３を調節する。以前補正し
た量をそのままにしておくことにより、補正量の変化を
小さく押さえることができる。そして冷凍サイクルの運
転状態を観測し、圧縮機１の使用条件が満足されている
かどうかを判断する。使用条件が満足されていればその
ままとし、満足されなければ電子式膨張弁３の減圧量を
調節する。If the conditions are satisfied, it is not necessary to adjust the electronic expansion valve 3, but if the usage conditions of the compressor 1 are not satisfied, the electronic expansion valve 3 is adjusted according to the unsatisfied state. The amount of pressure reduction is corrected until the usage condition of the compressor 1 is satisfied. If the cold water temperature is high, the operating frequency is increased to increase the refrigeration capacity. At that time, the electronic expansion valve 3 is adjusted to a pressure reduction amount corresponding to the operating frequency. By keeping the previously corrected amount as it is, the change in the corrected amount can be suppressed small. Then, the operating state of the refrigeration cycle is observed to determine whether the usage conditions of the compressor 1 are satisfied. If the usage condition is satisfied, the condition is left as it is, and if not satisfied, the decompression amount of the electronic expansion valve 3 is adjusted.
【００１５】常に冷凍サイクルの状態を監視し、ある範
囲内に冷凍サイクルの運転状態を保つことにより、安定
した冷凍サイクル状態にでき、安定した冷水を供給する
ことができ圧縮機１の使用条件を満たすことができる。By constantly monitoring the state of the refrigerating cycle and maintaining the operating state of the refrigerating cycle within a certain range, a stable refrigerating cycle state can be obtained, stable cold water can be supplied, and the operating conditions of the compressor 1 can be controlled. Can be satisfied.
【００１６】[0016]
【発明の効果】本発明によれば、圧縮機の使用条件を満
足できるので圧縮機の寿命を短くすること無く製品を使
用できる。また、安定した温度の冷水を供給することが
できる。According to the present invention, since the usage conditions of the compressor can be satisfied, the product can be used without shortening the life of the compressor. Further, cold water having a stable temperature can be supplied.
【図１】本発明を適用した冷水供給装置の系統図。FIG. 1 is a system diagram of a cold water supply device to which the present invention is applied.
１…圧縮機、２…凝縮器、３…電子式膨張弁、４…蒸発
器、５…冷媒配管、６…ポンプ、７…冷水配管、８…負
荷、９…冷水入口温度センサ、１０…冷水出口温度セン
サ、１１…制御器、１２…インバータ、１３…吐出圧力
センサ、１４…吸入圧力センサ。1 ... Compressor, 2 ... Condenser, 3 ... Electronic expansion valve, 4 ... Evaporator, 5 ... Refrigerant piping, 6 ... Pump, 7 ... Cold water piping, 8 ... Load, 9 ... Cold water inlet temperature sensor, 10 ... Cold water Outlet temperature sensor, 11 ... Controller, 12 ... Inverter, 13 ... Discharge pressure sensor, 14 ... Suction pressure sensor.
Claims (1)
器，外部より減圧量を調節できる電子式膨張弁，蒸発器
を冷媒配管で順次接続した冷凍サイクル並びに、前記蒸
発器により熱交換された冷水を負荷との間を循環させる
冷水配管，ポンプを持ち、前記圧縮機の吸入圧力と、吐
出圧力を測定できる圧力センサ及び、冷水温度を測定す
る温度センサを有する冷水供給装置の制御方法におい
て、前記冷凍サイクルの状態を把握し、前記電子式膨張
弁の減圧量を調整することにより、前記圧縮機の使用条
件を満足し、かつ安定した冷凍サイクルに制御すること
を特徴とする冷水供給装置の制御方法。1. A compressor having a variable capacity by capacity control, a condenser, an electronic expansion valve capable of adjusting a decompression amount from the outside, a refrigeration cycle in which an evaporator is sequentially connected by a refrigerant pipe, and heat exchange by the evaporator. In a method for controlling a cold water supply device having a cold water pipe and a pump for circulating cold water between a load and a pump, capable of measuring suction pressure and discharge pressure of the compressor, and a temperature sensor for measuring cold water temperature. A chilled water supply device characterized in that a condition of the refrigeration cycle is grasped and a decompression amount of the electronic expansion valve is adjusted to satisfy a usage condition of the compressor and to control a stable refrigeration cycle. Control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10839893A JPH06323639A (en) | 1993-05-10 | 1993-05-10 | Method for controlling chilled water supplying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10839893A JPH06323639A (en) | 1993-05-10 | 1993-05-10 | Method for controlling chilled water supplying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06323639A true JPH06323639A (en) | 1994-11-25 |
Family
ID=14483751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10839893A Pending JPH06323639A (en) | 1993-05-10 | 1993-05-10 | Method for controlling chilled water supplying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06323639A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002318014A (en) * | 2001-04-17 | 2002-10-31 | Mitsubishi Heavy Ind Ltd | Method and apparatus for controlling expansion valve in freezer |
| WO2005098328A1 (en) * | 2004-04-09 | 2005-10-20 | Matsushita Electric Industrial Co. Ltd. | Drying equipment |
| JP2008241072A (en) * | 2007-03-26 | 2008-10-09 | Mitsubishi Electric Corp | Refrigerating cycle device |
| US7472559B2 (en) * | 2003-04-04 | 2009-01-06 | Lg Electronics Inc. | Method for controlling air conditioner |
| JP2012067967A (en) * | 2010-09-24 | 2012-04-05 | Panasonic Corp | Refrigeration cycle apparatus and hot water heating apparatus |
| KR101867207B1 (en) * | 2014-07-30 | 2018-06-12 | 미츠비시 쥬코 서멀 시스템즈 가부시키가이샤 | Turbo refrigerator, control device therefor, and control method therefor |
| JPWO2021005705A1 (en) * | 2019-07-09 | 2021-01-14 |
-
1993
- 1993-05-10 JP JP10839893A patent/JPH06323639A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002318014A (en) * | 2001-04-17 | 2002-10-31 | Mitsubishi Heavy Ind Ltd | Method and apparatus for controlling expansion valve in freezer |
| JP4690574B2 (en) * | 2001-04-17 | 2011-06-01 | 三菱重工業株式会社 | Control method and control device for expansion valve in refrigerator |
| US7472559B2 (en) * | 2003-04-04 | 2009-01-06 | Lg Electronics Inc. | Method for controlling air conditioner |
| WO2005098328A1 (en) * | 2004-04-09 | 2005-10-20 | Matsushita Electric Industrial Co. Ltd. | Drying equipment |
| CN100453922C (en) * | 2004-04-09 | 2009-01-21 | 松下电器产业株式会社 | Drying equipment |
| JP2008241072A (en) * | 2007-03-26 | 2008-10-09 | Mitsubishi Electric Corp | Refrigerating cycle device |
| JP2012067967A (en) * | 2010-09-24 | 2012-04-05 | Panasonic Corp | Refrigeration cycle apparatus and hot water heating apparatus |
| KR101867207B1 (en) * | 2014-07-30 | 2018-06-12 | 미츠비시 쥬코 서멀 시스템즈 가부시키가이샤 | Turbo refrigerator, control device therefor, and control method therefor |
| JPWO2021005705A1 (en) * | 2019-07-09 | 2021-01-14 | ||
| WO2021005705A1 (en) * | 2019-07-09 | 2021-01-14 | 日本電気株式会社 | Cooling system, surge generation prevention device, surge generation prevention method, and surge generation prevention program |
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