JPH1183206A - Operation controller for refrigerator - Google Patents
Operation controller for refrigeratorInfo
- Publication number
- JPH1183206A JPH1183206A JP9250297A JP25029797A JPH1183206A JP H1183206 A JPH1183206 A JP H1183206A JP 9250297 A JP9250297 A JP 9250297A JP 25029797 A JP25029797 A JP 25029797A JP H1183206 A JPH1183206 A JP H1183206A
- Authority
- JP
- Japan
- Prior art keywords
- expansion valve
- discharge pipe
- electronic expansion
- value
- pipe temperature
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/15—Hunting, i.e. oscillation of controlled refrigeration variables reaching undesirable values
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、冷凍装置の運転
制御装置に関し、さらに詳しくは電子膨張弁の動作量を
足切りするようにしたものにおいて、該電子膨張弁の開
動作時における動作量の設定制御に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for a refrigeration system, and more particularly, to an operation control device for reducing the operation amount of an electronic expansion valve. It is related to setting control.
【０００２】[0002]
【従来の技術】従来より、空気調和機等の冷凍装置にお
いては、電子膨張弁による冷媒の減圧量、即ち、開閉動
作量を、当該冷凍装置において最大の冷凍能力及び運転
効率が得られるように算出するとともに、その動作量
（即ち、目標動作量（パルス数））の算出を、冷媒の過
熱度あるいは湿り度をより的確に反映する圧縮機の吐出
管温度を基準として行うようにしている。2. Description of the Related Art Conventionally, in a refrigerating apparatus such as an air conditioner, the amount of pressure reduction of a refrigerant by an electronic expansion valve, that is, an opening / closing operation amount is determined so that the maximum refrigerating capacity and operating efficiency can be obtained. In addition to the calculation, the operation amount (that is, the target operation amount (the number of pulses)) is calculated based on the discharge pipe temperature of the compressor which more accurately reflects the degree of superheat or wetness of the refrigerant.
【０００３】また一方、この電子膨張弁の動作量は、こ
れが過度に大きくなると急激な開度変化によって圧縮機
の信頼性が損なわれることになるため、圧縮機の信頼性
の確保の観点から、冷凍装置の能力確保等の観点から求
められる上記目標動作量に、開動作方向及び閉動作方向
の双方にそれぞれ一定の足切り値を設定している。即
ち、例えば図４に示すように、目標動作量「Ｐｆｚｙ」
を開動作方向の値「＋８（パルス）」と閉動作方向の値
「−３（パルス）」とにより区画し、目標動作量「Ｐｆ
ｚｙ」が「＋８〜−３」の範囲内である場合には、該目
標動作量をそのまま実動作量「Ｐ」として採用するが、
目標動作量「Ｐｆｚｙ」が「Ｐｆｚｙ＞＋８」の範囲で
ある場合には一律にこれを「＋８」に足切りする。ま
た、目標動作量「Ｐｆｚｙ」が「Ｐｆｚｙ＜−３」の範
囲である場合には、該目標動作量「Ｐｆｚｙ」を一律に
「−３」に足切りするとともに、特に目標動作量「Ｐｆ
ｚｙ」が「−８以下」である場合には該目標動作量「Ｐ
ｆｚｙ」を一律に「−５」に足切りするようにしてい
る。On the other hand, when the operation amount of the electronic expansion valve becomes excessively large, a sudden change in the opening degree impairs the reliability of the compressor. Therefore, from the viewpoint of securing the reliability of the compressor, For the target operation amount obtained from the viewpoint of ensuring the performance of the refrigeration system, for example, constant cut-off values are set in both the opening operation direction and the closing operation direction. That is, as shown in FIG. 4, for example, the target operation amount “Pfzy”
Is divided by a value “+8 (pulse)” in the opening operation direction and a value “−3 (pulse)” in the closing operation direction, and the target operation amount “Pf”
When “zy” is within the range of “+8 to −3”, the target operation amount is used as it is as the actual operation amount “P”.
When the target operation amount “Pfzy” is in the range of “Pfzy> +8”, this is uniformly reduced to “+8”. When the target operation amount “Pfzy” is in the range of “Pfzy <−3”, the target operation amount “Pfzy” is uniformly reduced to “−3”, and the target operation amount “Pfzy” is particularly reduced.
zy ”is“ −8 or less ”, the target operation amount“ P
“fzy” is uniformly reduced to “−5”.
【０００４】[0004]
【発明が解決しようとする課題】ところが、このように
電子膨張弁の動作量を足切りするようにした場合、特に
該電子膨張弁の開動作時においては次のような問題があ
った。即ち、例えば、室内空調用の空気調和機におい
て、通常運転途中に部屋の窓が閉じた状態から急激に開
放されたような場合には吐出管温度が急激に上昇して冷
媒の過熱度が過大となり空調能力の低下を来すため、上
記電子膨張弁はかかる異常状態を解消して最適な運転状
態とすべく開動作するが、この電子膨張弁の開動作の動
作量が足切りを受けることから、その開動作が緩慢とな
り、最適な運転状態に移行するまでに時間がかかるとと
もに、場合によってはかかる電子膨張弁の開動作の緩慢
により吐出管温度がハンチングし、これらにより空調特
性が損なわれるという問題があった。However, when the operation amount of the electronic expansion valve is cut off as described above, there are the following problems particularly when the electronic expansion valve is opened. That is, for example, in an air conditioner for room air conditioning, when the room window is suddenly opened from a closed state during normal operation, the discharge pipe temperature rises sharply and the degree of superheat of the refrigerant becomes excessive. In order to reduce the air conditioning capacity, the electronic expansion valve is opened to eliminate the abnormal state and to achieve the optimal operation state, but the amount of operation of the electronic expansion valve is cut off. Therefore, the opening operation becomes slow, and it takes time to shift to the optimal operation state, and in some cases, the opening operation of the electronic expansion valve slows down, so that the discharge pipe temperature hunts, thereby impairing the air conditioning characteristics. There was a problem.
【０００５】そこで本願発明では、電子膨張弁の開動作
の動作量に足切りを設けたものにおいて、何らかの原因
により吐出管温度が過度に上昇する急激な過渡運転状態
時に、該電子膨張弁の迅速な開動作を確保し、より迅速
に最適な運転状態に移行し得るようにした冷凍装置の運
転制御装置を提供せんとしてなされたものである。Accordingly, in the present invention, in the case where the operation amount of the opening operation of the electronic expansion valve is provided with a cut-off amount, in a sudden transient operation state in which the discharge pipe temperature excessively rises for some reason, the electronic expansion valve is rapidly operated. The present invention has been made to provide an operation control device for a refrigeration apparatus that can ensure a proper opening operation and can quickly shift to an optimum operation state.
【０００６】[0006]
【課題を解決するための手段】本願発明ではかかる課題
を解決するための具体的手段として次のような構成を採
用している。Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.
【０００７】本願の第１の発明では、圧縮機と四路切換
弁と凝縮器とレシーバと電子膨張弁と蒸発器とを冷媒管
路で順次接続してなる冷媒回路を備え、通常の冷・暖房
運転時には、上記圧縮機の吐出管温度を最適値とする上
記電子膨張弁の目標動作量を算出するとともに、該目標
動作量が予め設定した足切り値を越える場合には該目標
動作量を該足切り値に足切りしてこれを実動作量とし、
該実動作量だけ上記電子膨張弁を動作させるようにした
冷凍装置の運転制御装置において、上記電子膨張弁が開
弁方向に動作する場合で且つ吐出管温度が所定値以上で
ある場合には、上記実動作量を、吐出管温度に応じて設
定した加算値だけ加算補正することを特徴としている。According to the first aspect of the present invention, a refrigerant circuit comprising a compressor, a four-way selector valve, a condenser, a receiver, an electronic expansion valve, and an evaporator sequentially connected by a refrigerant line is provided. During the heating operation, a target operation amount of the electronic expansion valve that optimizes the discharge pipe temperature of the compressor is calculated, and when the target operation amount exceeds a cut-off value set in advance, the target operation amount is reduced. Cut to the cut-off value and use this as the actual operation amount,
In the operation control device of the refrigeration system that operates the electronic expansion valve by the actual operation amount, when the electronic expansion valve operates in the valve opening direction and the discharge pipe temperature is equal to or higher than a predetermined value, It is characterized in that the actual operation amount is added and corrected by an addition value set according to the discharge pipe temperature.
【０００８】本願の第２の発明では、上記第１の発明に
かかる冷凍装置の運転制御装置において、上記加算値
を、上記吐出管温度が高いほど大きな値となるように複
数段階に設定したことを特徴としている。According to a second aspect of the present invention, in the operation control device for a refrigeration system according to the first aspect, the additional value is set in a plurality of steps so that the higher the discharge pipe temperature, the greater the value. It is characterized by.
【０００９】[0009]
【発明の効果】本願発明ではかかる構成とすることによ
り次のような効果が得られる。According to the present invention, the following effects can be obtained by adopting such a configuration.
【００１０】 本願の第１の発明にかかる冷凍装置の
運転制御装置によれば、電子膨張弁が開弁方向に動作す
る場合で且つ吐出管温度が所定値以上である場合、即
ち、吐出管温度の過上昇の危険性があり迅速に電子膨張
弁を開動作させて素早く最適な運転状態に移行させる必
要がある場合には、目標動作量を足切りして求められた
実動作量が、さらに吐出管温度に応じて設定された加算
値だけ加算補正され、この加算補正後の実動作量に基づ
いて上記電子膨張弁が開動作することになる。この結
果、例えば、かかる加算補正が行われず、足切り後の実
動作量そのままで開動作される場合に比して、上記電子
膨張弁の開動作の動作がより迅速となり、それだけ素早
く短時間で冷凍装置の運転状態が最適な運転状態に移行
され、吐出管温度の過度の上昇が可及的に抑制されると
ともに、電子膨張弁の緩慢な開動作に基づく吐出管温度
のハンチングの発生が未然に防止され、これらの結果、
電子膨張弁の開動作の動作量に足切りを設けている構成
にも拘わらず、良好な運転特性が実現されるものであ
る。According to the operation control device for a refrigeration apparatus according to the first aspect of the present invention, when the electronic expansion valve operates in the valve opening direction and the discharge pipe temperature is equal to or higher than a predetermined value, that is, the discharge pipe temperature If it is necessary to quickly open the electronic expansion valve and quickly shift to the optimal operating state due to the danger of excessive rise of the actual operation amount obtained by cutting off the target operation amount, The electronic expansion valve is opened based on the actual operation amount after the addition correction by the addition value set according to the discharge pipe temperature. As a result, for example, compared to the case where the addition correction is not performed and the opening operation is performed with the actual operation amount after the cut off, the operation of opening the electronic expansion valve is more rapid, and the operation is quicker and shorter. The operating state of the refrigeration system is shifted to the optimal operating state, and excessive rise of the discharge pipe temperature is suppressed as much as possible, and hunting of the discharge pipe temperature due to the slow opening operation of the electronic expansion valve occurs. These results,
In spite of the configuration in which the operation amount of the opening operation of the electronic expansion valve is cut off, good operation characteristics are realized.
【００１１】 本願の第２の発明にかかる冷凍装置の
運転制御装置によれば、上記第１の発明にかかる冷凍装
置の運転制御装置において、上記加算値を、上記吐出管
温度が高いほど大きな値となるように複数段階に設定し
ているので、吐出管温度に基づく電子膨張弁の開動作の
制御がより緻密に行われることとなり、それだけ上記
に記載の効果がさらに顕著となるものである。According to the operation control apparatus for a refrigeration apparatus according to the second invention of the present application, in the operation control apparatus for the refrigeration apparatus according to the first invention, the addition value is set to a larger value as the discharge pipe temperature is higher. Is set in a plurality of stages so that the opening operation of the electronic expansion valve based on the discharge pipe temperature is more precisely controlled, and the effect described above becomes more remarkable.
【００１２】[0012]
【発明の実施の形態】以下、本願発明にかかる冷凍装置
の運転制御装置を、空気調和機の運転制御装置を例にと
って具体的に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an operation control device for a refrigerating apparatus according to the present invention will be specifically described by taking an operation control device for an air conditioner as an example.
【００１３】図１には、本願発明の運転制御装置が適用
される空気調和機の全体システムを示している。この空
気調和機は、圧縮機１と四路切換弁２と冷房運転時には
疑縮器として作用し暖房運転時には蒸発器として作用す
る室外熱交換器３とレシーバ４と減圧機構として作用す
る電子膨張弁５と冷房運転時には蒸発器として作用し暖
房運転時には凝縮器として作用する室内熱交換器６とを
冷媒配管を介して順次接続してなる冷媒回路Ａを備えて
おり、上記四路切換弁２の切換作動により、冷房運転時
には実線矢印で示す方向に、暖房運転時には破線矢印で
示す方向に冷楳を可逆流通させ得るようにされている。
尚、符号７は室外熱交換器３に送風する室外ファン、８
は室内熱交換器６に送風する室内ファンである。FIG. 1 shows an overall system of an air conditioner to which the operation control device of the present invention is applied. This air conditioner has a compressor 1, a four-way switching valve 2, an outdoor heat exchanger 3 which acts as a simulator during cooling operation and acts as an evaporator during heating operation, a receiver 4, and an electronic expansion valve which acts as a pressure reducing mechanism. And a refrigerant circuit A which is connected in sequence via a refrigerant pipe to an indoor heat exchanger 6 which acts as an evaporator during cooling operation and acts as a condenser during heating operation. By the switching operation, the cooling water can be reversibly circulated in the direction indicated by the solid arrow during the cooling operation and in the direction indicated by the broken arrow during the heating operation.
Reference numeral 7 denotes an outdoor fan that blows air to the outdoor heat exchanger 3;
Is an indoor fan that blows air to the indoor heat exchanger 6.
【００１４】上記冷媒回路Ａには、４個の逆止弁９Ａ〜
９Ｄからなる冷媒流通制御機構９が付設されており、該
冷媒流通制御機構９により、冷房運転時には室外熱交換
器３からの液冷媒がレシーバ４及び上記電子膨張弁５を
経て室内熱交換器６へ流れ、暖房運転時には室内熱交換
器６からの液冷媒がレシーバ４及び電子膨張弁５を経て
室外熱交換器３へ流れるように冷楳流通方向が制御され
る。The refrigerant circuit A has four check valves 9A to 9A.
9D, a refrigerant flow control mechanism 9 is provided. The refrigerant flow control mechanism 9 allows the liquid refrigerant from the outdoor heat exchanger 3 to pass through the receiver 4 and the electronic expansion valve 5 during the cooling operation. During the heating operation, the cold circulation direction is controlled such that the liquid refrigerant from the indoor heat exchanger 6 flows to the outdoor heat exchanger 3 via the receiver 4 and the electronic expansion valve 5.
【００１５】また、上記レシーバ４の上部と上記電子膨
張弁５の下流側とは、キャピラリチューブ２０を介設し
たガス抜き通路１９により連通されている。このガス抜
き通路１９により上記レシーバ４内のガスを抜き取るこ
とで該レシーバ４への液冷媒の溜め込み量を最大とする
ことができるようになっている。The upper part of the receiver 4 and the downstream side of the electronic expansion valve 5 are communicated with each other by a gas vent passage 19 provided with a capillary tube 20. By extracting gas from the receiver 4 through the gas vent passage 19, the amount of liquid refrigerant accumulated in the receiver 4 can be maximized.
【００１６】また、上記冷媒回路Ａには、圧縮機１の吸
入圧力が所定値以下となった時に動作する低圧スイッチ
１０と、圧縮機１の吐出圧力が所定値以上となった時に
動作する高圧スイッチ１１と、圧縮機１の吐出管温度
「Ｔ２」を検出する吐出管温度センサー１２と、外気温
度を検出する外気温センサー１３と、室外熱交換器３の
冷媒温度を検出する外熱交温度センサー１４と、室内熱
交換器６の冷媒温度を検出する内熱交温度センサー１５
と、室内空気温度を検出する室温センサー１６とが付設
されている。The refrigerant circuit A has a low-pressure switch 10 that operates when the suction pressure of the compressor 1 becomes lower than a predetermined value, and a high-pressure switch 10 that operates when the discharge pressure of the compressor 1 becomes higher than a predetermined value. A switch 11, a discharge pipe temperature sensor 12 for detecting a discharge pipe temperature "T2" of the compressor 1, an outside air temperature sensor 13 for detecting an outside air temperature, and an outside heat exchange temperature for detecting a refrigerant temperature of the outdoor heat exchanger 3. Sensor 14 and an internal heat exchange temperature sensor 15 for detecting the refrigerant temperature of the indoor heat exchanger 6
And a room temperature sensor 16 for detecting the indoor air temperature.
【００１７】上記圧縮機１と上記四路切換弁２と上記室
外熱交換器３と上記レシーバ４と上記電子膨張弁５及び
上記室外ファン７とで室外ユニットＸが構成され、ま
た、上記室内熱交換器６と上記室内ファン８とで室内ユ
ニットＹが構成される。尚、符号２４は液側閉鎖弁、２
５はガス側閉鎖弁である。The compressor 1, the four-way switching valve 2, the outdoor heat exchanger 3, the receiver 4, the electronic expansion valve 5, and the outdoor fan 7 constitute an outdoor unit X. The exchanger 6 and the indoor fan 8 constitute an indoor unit Y. Reference numeral 24 denotes a liquid-side stop valve, 2
5 is a gas side shut-off valve.
【００１８】上記室外ユニットＸには、上記低圧スイッ
チ１０，高圧スイッチ１１，吐出管温度センサー１２，
外気温センサー１３及び外熱交温度センサー１４のそれ
ぞれからの信号を受けて各種の演算処理を行って、上記
圧縮機１，四路切換弁２，室外ファン７及び上記電子膨
張弁５のそれぞれに制御信号を出力する室外制御ユニッ
ト２１が設けられている。The outdoor unit X includes a low-pressure switch 10, a high-pressure switch 11, a discharge pipe temperature sensor 12,
Upon receiving signals from the outside air temperature sensor 13 and the outside heat exchange temperature sensor 14, various types of arithmetic processing are performed, and the compressor 1, the four-way switching valve 2, the outdoor fan 7, and the electronic expansion valve 5 are respectively supplied to the compressor 1. An outdoor control unit 21 that outputs a control signal is provided.
【００１９】一方、上記室内ユニットＹには、上記内熱
交温度センサー１５及び上記室温センサー１６からの信
号入力により各種の演算処理を行って、上記室内ファン
８へ制御信号を出力する室内制御ユニット２３が設けら
れている。尚、上記室内制御ユニット２３は、リモート
コントローラ２２との間で信号の授受が行われる。ま
た、上記室外制御ユニット２１と室内制御ユニット２３
との間においても信号の授受が行われる。On the other hand, the indoor unit Y performs various arithmetic processings based on signal inputs from the internal heat exchange temperature sensor 15 and the room temperature sensor 16 and outputs a control signal to the indoor fan 8. 23 are provided. The indoor control unit 23 exchanges signals with the remote controller 22. The outdoor control unit 21 and the indoor control unit 23
The transmission and reception of the signal is also performed between.
【００２０】ところで、このような空気調和機において
は、従来より、空気調和機等の冷凍装置においては、電
子膨張弁の開閉動作量を、当該冷凍装置において最大の
冷凍能力及び運転効率が得られるように算出するととも
に、その目標とすべき動作量の算出を、冷媒の過熱度あ
るいは湿り度をより的確に反映する圧縮機の吐出管温度
を基準として行うようにする一方、さらにこれに加え
て、電子膨張弁の動作量が過度に大きくなると急激な開
度変化によって圧縮機の信頼性が損なわれることから圧
縮機の信頼性確保の観点から、上記電子膨張弁の目標動
作量に一定の足切り値を設定し、目標動作量が過大であ
る場合にはこれを足切りして電子膨張弁が急激な開度変
化をしないようにしているが、このように電子膨張弁の
動作量に足切りを設けた場合、例えば、室内空調用の空
気調和機において何らかの原因で冷・暖房負荷が急増し
圧縮機１の吐出管温度が急激に上昇し、これを受けて、
最適な運転状態に移行させるべく上記電子膨張弁５が開
動作する場合に、上記動作量の足切りにより上記電子膨
張弁５の開動作が緩慢となり、吐出管温度の過度の上
昇、あるいは開動作の緩慢さに起因して吐出管温度にハ
ンチングが発生し空調特性が損なわれるおそれがあるこ
とは既述の通りである。By the way, in such an air conditioner, conventionally, in a refrigerating device such as an air conditioner, the opening / closing operation amount of an electronic expansion valve can be obtained to obtain the maximum refrigerating capacity and operating efficiency in the refrigerating device. In addition to the above calculation, the target operation amount is calculated based on the discharge pipe temperature of the compressor that more accurately reflects the degree of superheat or wetness of the refrigerant. However, if the operation amount of the electronic expansion valve becomes excessively large, the reliability of the compressor is impaired due to a sudden change in the opening degree, so that from the viewpoint of securing the reliability of the compressor, a certain footprint is required for the target operation amount of the electronic expansion valve. The cut-off value is set, and when the target operation amount is excessive, it is cut off so that the electronic expansion valve does not suddenly change in the opening degree. Set the cut And if, for example, the discharge pipe temperature of the compressor 1 cooling and heating load increases suddenly for some reason increases rapidly in the air conditioner for room air conditioning, In response to this,
When the electronic expansion valve 5 is opened to shift to an optimal operation state, the opening operation of the electronic expansion valve 5 becomes slow due to the cutoff of the operation amount, and the discharge pipe temperature excessively increases or opens. As described above, hunting may occur in the discharge pipe temperature due to the slowness of the air conditioner, and the air conditioning characteristics may be impaired.
【００２１】かかる従来の問題点を解決すべくこの実施
形態のものにおいては、従来と同様に電子膨張弁の動作
量に一定の足切りを設けたものにおいて、その足切り後
の動作量（即ち、従来ならば、そのまま実動作量として
出力される値）に、吐出管温度に応じて(換言すれば電
子膨張弁の開度要求度合いに応じて)設定した加算値を
加算補正してこれを補正後の実動作量として出力するこ
とで、動作量の足切りを基本制御としたものでありなが
ら吐出管温度が所定値以上の場合には足切りされた動作
量よりも大きな動作量で電子膨張弁を迅速に開動作させ
て吐出管温度の過度の上昇を的確に抑えることができる
ようにしている。以下、この電子膨張弁の動作量の加算
補正制御の内容を、図２及び図３を参照して説明する。In order to solve such a conventional problem, in this embodiment, a fixed amount of cut is provided for the operation amount of the electronic expansion valve as in the conventional case, and the operation amount after the cut (ie, Conventionally, the addition value set according to the discharge pipe temperature (in other words, according to the required degree of opening of the electronic expansion valve) is added to the value output as the actual operation amount as it is, and corrected. By outputting as a corrected actual operation amount, when the discharge pipe temperature is equal to or higher than a predetermined value, the electronic operation is performed with a larger operation amount than the operation amount when the discharge pipe temperature is equal to or higher than a predetermined value, even though the operation amount is cut off as the basic control. The expansion valve is quickly opened so that an excessive rise in the discharge pipe temperature can be accurately suppressed. Hereinafter, the content of the addition correction control of the operation amount of the electronic expansion valve will be described with reference to FIGS. 2 and 3.
【００２２】図２のフローチャートにおいて、制御開始
後、先ず最初に、現在の運転状態が通常の冷房あるいは
暖房運転時がどうかを判定する（ステップＳ１）。ここ
で、通常運転時でない場合、例えば起動制御時とかサー
モオフ制御時等においては足切り制御等は行わないので
そのままリターンする。In the flowchart of FIG. 2, after the control is started, first, it is determined whether or not the current operation state is a normal cooling or heating operation (step S1). Here, when it is not the normal operation, for example, at the time of the start control or the thermo-off control, since the cut-off control or the like is not performed, the process returns as it is.
【００２３】これに対して、通常運転時であると判定さ
れた場合には、先ずステップＳ２において、現在の吐出
管温度「Ｔ２」等のデータを読み込むとともに、ステップ
Ｓ３において最適吐出管制御により電子膨張弁５の目標
動作量「Ｐｆｚｙ」を求める。尚、この目標動作量「Ｐ
ｆｚｙ」は、最大の冷暖房能力及び運転効率等が得られ
るように、吐出管温度、外気温度、室内及び室外の各熱
交換器の温度等に基づいて演算により算出されるもので
あり、その算出方法は従来周知であるためここでの説明
は省略する。On the other hand, when it is determined that the normal operation is being performed, first, in step S2, data such as the current discharge pipe temperature "T2" is read, and in step S3, the electronic control is performed by the optimal discharge pipe control. A target operation amount “Pfzy” of the expansion valve 5 is obtained. Note that this target operation amount “P
fzy "is calculated based on the discharge pipe temperature, the outside air temperature, the temperature of each indoor and outdoor heat exchanger, and the like so that the maximum cooling and heating capacity and operating efficiency can be obtained. Since the method is well known in the art, a description thereof will be omitted.
【００２４】次に、上記目標動作量「Ｐｆｚｙ」を一定
の足切り条件の下で（例えば、図４に示す如き足切り値
の設定の下で）足切りし、足切り後の動作量、即ち、足
切り動作量「Ｐ1」を求める（ステップＳ４）。Next, the target motion amount "Pfzy" is cut off under a certain cut-off condition (for example, under setting of a cut-off value as shown in FIG. 4), and the motion amount after the cut-off is calculated. That is, the stepping motion amount “P 1 ” is obtained (step S4).
【００２５】しかる後、吐出管温度に応じた動作量の加
算補正を行う。先ず、ステップＳ５において加算補正の
条件の適否を判定する。即ち、吐出管温度「Ｔ２」が１
１０℃以上で、且つ上記足切り動作量「Ｐ1」が「Ｐ1＞
０」である時（即ち、開動作の要求である時）に初めて
加算補正の条件成立と判定し、これ以外の場合には加算
補正は行わず、上記足切り動作量「Ｐ1」をそのまま実
動作量「Ｐ」とし（ステップＳ１３）、この実動作量
「Ｐ」を出力して電子膨張弁５を開動作させる。Thereafter, an addition correction of the operation amount according to the discharge pipe temperature is performed. First, in step S5, it is determined whether the conditions for the addition correction are appropriate. That is, the discharge pipe temperature “T2” is 1
10 ° C. or more, and the above-mentioned stepping movement amount “P 1 ” is “P 1 >
When 0 "(that is, when is a request of opening operation) for the first time is determined that the condition is satisfied of the addition correction, the addition correction is not performed in other cases, the cutback operations amount to" P 1 "as it is The actual operation amount "P" is set (step S13), and the electronic operation valve 5 is opened by outputting the actual operation amount "P".
【００２６】これに対して、ステップＳ５において、加
算補正の条件成立と判定された場合には、加算補正の実
行に移行する。尚、ここで、加算補正の加算値「α」の
設定について説明する。この実施形態においては、図３
に示すように、動作量の加算補正が必要な運転状態とし
て、吐出管温度「Ｔ２」が１１０℃以上の領域を設定
し、さらにこの運転領域を吐出管温度「Ｔ２」によって
「１２０＜Ｔ２」の領域と「１１５＜Ｔ２≦１２０」の
領域及び「１１０＜Ｔ２≦１１５」の領域の三つの領域
に分け、それぞれその吐出管温度領域における加算値
「α」を、「１０パルス」、「５パルス」及び「２パル
ス」と、吐出管温度が高くなる程（換言すれば、開動作
要求が大きい程）加算値の値が大きくなるように（換言
すれば、電子膨張弁の開動作時が迅速となるように）設
定している。On the other hand, when it is determined in step S5 that the conditions for the addition correction are satisfied, the flow shifts to the execution of the addition correction. Here, the setting of the addition value “α” of the addition correction will be described. In this embodiment, FIG.
As shown in (2), as an operation state in which addition correction of the operation amount is required, a region where the discharge pipe temperature “T2” is 110 ° C. or more is set, and this operation region is further set to “120 <T2” by the discharge pipe temperature “T2”. , A region of “115 <T2 ≦ 120” and a region of “110 <T2 ≦ 115”, and the added value “α” in the discharge pipe temperature region is set to “10 pulses”, “5”, respectively. The “pulse” and “two pulses” are set such that the higher the discharge pipe temperature (in other words, the greater the opening operation request), the larger the value of the added value (in other words, the time of the opening operation of the electronic expansion valve). To be quick).
【００２７】フローチャートのステップＳ６に戻って、
ここで現在の吐出管温度「Ｔ２」が１２０℃よりも高い
と判定された場合には、図３のテーブルから加算値「α
＝１０」を読み出し（ステップＳ８）、またステップＳ
７において吐出管温度「Ｔ２」が１１５℃〜１２０℃の
範囲であると判定された場合には加算値「α＝５」を読
み出し（ステップＳ９）、さらに吐出管温度「Ｔ２」が
１１０℃〜１１５℃の範囲である場合には加算値「α＝
２」を読み出す（ステップＳ７及びステップＳ１０）。Returning to step S6 of the flowchart,
Here, when it is determined that the current discharge pipe temperature “T2” is higher than 120 ° C., the addition value “α” is obtained from the table of FIG.
= 10 ”(step S8) and step S8.
7, when it is determined that the discharge pipe temperature “T2” is in the range of 115 ° C. to 120 ° C., the addition value “α = 5” is read (step S9), and the discharge pipe temperature “T2” is set to 110 ° C. or less. When the temperature is in the range of 115 ° C.,
2 "is read out (step S7 and step S10).
【００２８】しかる後、ステップＳ１１において、吐出
管温度「Ｔ２」に対応して求められた加算値「α」を上
記ステップＳ３で求めた足切り動作量「Ｐ1」に加算し
てそれぞれ吐出管温度「Ｔ２」に対応した実動作量
「Ｐ」を求める。そして、この実動作量「Ｐ」を出力
し、上記電子膨張弁５をこの実動作量「Ｐ」にて開動作
させる（ステップＳ１２）。Thereafter, in step S11, the added value "α" obtained corresponding to the discharge pipe temperature "T2" is added to the cut-off operation amount "P 1 " obtained in step S3, and the discharge pipes are added. An actual operation amount “P” corresponding to the temperature “T2” is obtained. Then, the actual operation amount "P" is output, and the electronic expansion valve 5 is opened with the actual operation amount "P" (step S12).
【００２９】このように、吐出管温度「Ｔ２」が所定温
度（この実施形態では「１１０℃」）よりも高いとき
に、電子膨張弁５の開動作の動作量を、目標動作量「Ｐ
ｆｚｙ」を足切りして求めた足切り動作量「Ｐ1」に吐
出管温度「Ｔ２」に対応して設定した加算値「α」を加
算して求め、これを実動作量「Ｐ」とし、この加算補正
後の実動作量「Ｐ」によって上記電子膨張弁５を開動作
させることで、例えば、かかる加算補正が行われず足切
り動作量「Ｐ1」によって上記電子膨張弁５が開動作さ
れる場合に比して、上記電子膨張弁５の開動作の動作が
より迅速となり、それだけ素早く短時間で空気調和機の
運転状態が最適な運転状態に移行され、吐出管温度「Ｔ
２」の過度の上昇が可及的に抑制されるとともに、電子
膨張弁５の緩慢な開動作に基づく吐出管温度のハンチン
グの発生が未然に防止され、これらの結果、電子膨張弁
５の開動作の動作量に足切りを設けている構成にも拘わ
らず、良好な運転特性が実現されるものである。As described above, when the discharge pipe temperature “T2” is higher than the predetermined temperature (“110 ° C.” in this embodiment), the operation amount of the opening operation of the electronic expansion valve 5 is changed to the target operation amount “P
fzy ”is obtained by adding the addition value“ α ”set corresponding to the discharge pipe temperature“ T2 ”to the cut-off operation amount“ P 1 ”obtained by cutting off, and this is set as the actual operation amount“ P ”. By opening the electronic expansion valve 5 with the actual operation amount “P” after the addition correction, for example, the electronic expansion valve 5 is opened with the cutoff operation amount “P 1 ” without performing the addition correction. The operation of opening the electronic expansion valve 5 is quicker than in the case where the air conditioner is operated.
2) is suppressed as much as possible, and hunting of the discharge pipe temperature due to the slow opening operation of the electronic expansion valve 5 is prevented beforehand. As a result, the opening of the electronic expansion valve 5 is prevented. In spite of the configuration in which the amount of operation is cut off, good driving characteristics are realized.
【図１】本願発明にかかる運転制御装置が適用される空
気調和機の冷媒回路図である。FIG. 1 is a refrigerant circuit diagram of an air conditioner to which an operation control device according to the present invention is applied.
【図２】本願発明にかかる運転制御装置における電子膨
張弁の開動作時の制御のフローチャートである。FIG. 2 is a flowchart of control at the time of an opening operation of an electronic expansion valve in the operation control device according to the present invention.
【図３】電子膨張弁の動作量の補正テーブルである。FIG. 3 is a correction table of an operation amount of an electronic expansion valve.
【図４】電子膨張弁の動作量の足切り制御の説明図であ
る。FIG. 4 is an explanatory diagram of cut-off control of an operation amount of an electronic expansion valve.
１は圧縮機、２は四路切換弁、３は室外熱交換器、４は
レシーバ、５は電子膨張弁、６は室内熱交換器、７は室
外ファン、８は室内ファン、９は冷媒流通制御機構、９
Ａ〜９Ｄは逆止弁、１０は低圧スイッチ、１１は高圧ス
イッチ、１２は吐出管温度センサ、１３は外気温セン
サ、１４は外熱交温度センサ、１５は内熱交温度セン
サ、１６は室温センサ、１９はガス抜き通路、２０はキ
ャピラリチューブ、２１は室外制御ユニット、２２はリ
モートコントローラ、２３は室内制御ユニット、２４は
液側閉鎖弁、２５はガス側閉鎖弁、Ｘは室外ユニット、
Ｙは室内ユニット、Ｚは冷媒回路である。1 is a compressor, 2 is a four-way switching valve, 3 is an outdoor heat exchanger, 4 is a receiver, 5 is an electronic expansion valve, 6 is an indoor heat exchanger, 7 is an outdoor fan, 8 is an indoor fan, and 9 is refrigerant flow. Control mechanism, 9
A to 9D are check valves, 10 is a low pressure switch, 11 is a high pressure switch, 12 is a discharge pipe temperature sensor, 13 is an outside air temperature sensor, 14 is an external heat exchange temperature sensor, 15 is an internal heat exchange temperature sensor, and 16 is room temperature. Sensor, 19 is a gas vent passage, 20 is a capillary tube, 21 is an outdoor control unit, 22 is a remote controller, 23 is an indoor control unit, 24 is a liquid side shutoff valve, 25 is a gas side shutoff valve, X is an outdoor unit,
Y is an indoor unit, and Z is a refrigerant circuit.
Claims (2)
器（３）とレシーバ（４）と電子膨張弁（５）と蒸発器
（６）とを冷媒管路で順次接続してなる冷媒回路（Ｚ）
を備え、通常の冷・暖房運転時には、上記圧縮機（１）
の吐出管温度(Ｔ２)を最適値とする上記電子膨張弁
（５）の目標動作量（Ｐｆｚｙ）を算出するとともに、
該目標動作量（Ｐｆｚｙ）が予め設定した足切り値を越
える場合には該目標動作量（Ｐｆｚｙ）を該足切り値に
足切りしてこれを実動作量（Ｐ）とし、該実動作量
（Ｐ）だけ上記電子膨張弁（５）を動作させるようにし
た冷凍装置の運転制御装置であって、 上記電子膨張弁（５）が開弁方向に動作する場合で且つ
吐出管温度(Ｔ２)が所定値以上である場合には、上記実
動作量（Ｐ）を、吐出管温度に応じて設定した加算値
（α）だけ加算補正することを特徴とする冷凍装置の運
転制御装置。1. A compressor (1), a four-way switching valve (2), a condenser (3), a receiver (4), an electronic expansion valve (5), and an evaporator (6) are sequentially connected by a refrigerant line. Refrigerant circuit (Z)
During normal cooling / heating operation, the compressor (1)
Calculating the target operation amount (Pfzy) of the electronic expansion valve (5), which makes the discharge pipe temperature (T2) of the above the optimum value,
If the target movement amount (Pfzy) exceeds a preset cut-off value, the target movement amount (Pfzy) is cut off to the cut-off value, which is set as an actual movement amount (P). An operation control device for a refrigeration system in which the electronic expansion valve (5) is operated only by (P), wherein the electronic expansion valve (5) operates in a valve opening direction and a discharge pipe temperature (T2). Is greater than or equal to a predetermined value, the actual operation amount (P) is added and corrected by an addition value (α) set in accordance with the discharge pipe temperature.
きな値となるように複数段階に設定したことを特徴とす
る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 added value (α) is set in a plurality of stages so as to increase as the discharge pipe temperature (T2) increases. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9250297A JPH1183206A (en) | 1997-09-16 | 1997-09-16 | Operation controller for refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9250297A JPH1183206A (en) | 1997-09-16 | 1997-09-16 | Operation controller for refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1183206A true JPH1183206A (en) | 1999-03-26 |
Family
ID=17205817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9250297A Pending JPH1183206A (en) | 1997-09-16 | 1997-09-16 | Operation controller for refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1183206A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016513781A (en) * | 2013-03-27 | 2016-05-16 | 三菱電機株式会社 | Vapor compression system and method for controlling a vapor compression system |
-
1997
- 1997-09-16 JP JP9250297A patent/JPH1183206A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016513781A (en) * | 2013-03-27 | 2016-05-16 | 三菱電機株式会社 | Vapor compression system and method for controlling a vapor compression system |
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