JPH0587429A - Refrigerating cycle controller - Google Patents
Refrigerating cycle controllerInfo
- Publication number
- JPH0587429A JPH0587429A JP27321791A JP27321791A JPH0587429A JP H0587429 A JPH0587429 A JP H0587429A JP 27321791 A JP27321791 A JP 27321791A JP 27321791 A JP27321791 A JP 27321791A JP H0587429 A JPH0587429 A JP H0587429A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- pressure
- temperature
- layer separation
- fan
- 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
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、圧縮機、凝縮器、受液
器及び蒸発器が順に接続されて成る冷凍サイクルを有
し、該サイクル中に、２層分離温度以上になると白濁状
態となる冷媒とオイルとを用いる冷凍サイクル制御装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a refrigeration cycle in which a compressor, a condenser, a liquid receiver and an evaporator are connected in sequence, and when the temperature exceeds the separation temperature of two layers, a white turbid state occurs. The present invention relates to a refrigeration cycle control device using a refrigerant and an oil.
【０００２】[0002]
【従来の技術】従来、このような冷凍サイクル制御装置
としては、冷凍サイクル中の受液器にサイトグラスが設
けられていると共に、２層分離現象を抑制する抑制手段
と、冷媒充填量を点検するタイミングを発生するタイミ
ング発生手段と、前記タイミングの発生により前記抑制
手段を作動させる制御手段とを備えているものが知られ
ている（例えば、特開平２−２８７０７０号公報）。こ
の従来技術では、冷媒充填量を点検する際に、タイミン
グ発生手段により前記タイミングが発生すると、即ち冷
媒充填作業用スイッチが操作されると、前記制御手段が
抑制手段を作動させる。具体的には、蒸発器のファンの
風量が最低にされると共に凝縮器のファンの風量が最大
にされ、これによって冷媒の温度が低下して２層分離現
象が抑制される。このとき、サイトグラスを目視するこ
とにより冷媒量が不足しているか否かを判定する。2. Description of the Related Art Conventionally, as such a refrigerating cycle control device, a sight glass is provided in a receiver during a refrigerating cycle, and a suppressing means for suppressing a two-layer separation phenomenon and a refrigerant charging amount are inspected. There is known a device provided with a timing generating means for generating a timing to operate and a control means for operating the suppressing means by the generation of the timing (for example, Japanese Patent Application Laid-Open No. 2-287070). In this conventional technique, when checking the refrigerant charge amount, when the timing is generated by the timing generating means, that is, when the refrigerant charging operation switch is operated, the control means operates the suppressing means. Specifically, the air volume of the evaporator fan is minimized and the air volume of the condenser fan is maximized, which lowers the temperature of the refrigerant and suppresses the two-layer separation phenomenon. At this time, it is determined whether the amount of the refrigerant is insufficient by visually observing the sight glass.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来技術では、上述したように、冷媒充填量を点検する際
に、前記制御手段が抑制手段を作動させることによって
２層分離現象が抑制されるが、サイトグラスが受液器に
設けられているために、２層分離現象が十分に抑制され
ていないときでも、白濁状態となっている冷媒がサイト
グラスから見えてしまう。その結果、この白濁を冷媒量
不足による気泡と誤り、冷凍サイクルに冷媒を過充填し
てしまう虞れがあるという問題点がある。However, in the above-mentioned prior art, as described above, the two-layer separation phenomenon is suppressed by the control means operating the suppressing means when checking the refrigerant charge amount. Since the sight glass is provided in the liquid receiver, the white turbid refrigerant can be seen from the sight glass even when the two-layer separation phenomenon is not sufficiently suppressed. As a result, this white turbidity is mistaken for bubbles due to a shortage of the refrigerant, and there is a risk of overfilling the refrigeration cycle with the refrigerant.
【０００４】本発明は、このような従来の問題点に着目
して為されたもので、冷媒充填量のチェック時に誤判定
をなくし、冷媒が過充填されるのを防止した冷凍サイク
ル制御装置を提供することを目的としている。The present invention has been made by paying attention to such a conventional problem, and provides a refrigeration cycle control device which eliminates erroneous determination at the time of checking the refrigerant filling amount and prevents the refrigerant from being overfilled. It is intended to be provided.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、圧縮機、凝縮器、受液器及び蒸発器が順
に接続されて成る冷凍サイクルを有し、該サイクル中
に、２層分離温度以上になると白濁状態となる冷媒とオ
イルとを用いる冷凍サイクル制御装置において、前記圧
縮器の吐出側の冷媒温度又は圧力を検出する検出手段
と、冷媒量のチェック時に操作されるスイッチと、前記
受液器をバイパスするバイパス通路と、該通路の入り口
を開閉する常閉の電磁弁と、前記バイパス通路中に設け
られたサイトグラスと、制御手段とを備え、該制御手段
は、前記スイッチの操作後、前記検出手段により検出さ
れる冷媒温度又は圧力が２層分離温度又は２層分離温度
に相当する圧力以上のとき、少なくとも前記凝縮器のフ
ァン及び前記蒸発器のファンのいずれか一方を冷媒温度
が下がる方向に変速すると共に、前記検出される冷媒温
度又は圧力が２層分離温度又は２層分離温度に相当する
圧力以下のとき、前記電磁弁を開くように構成されてい
る。In order to solve the above-mentioned problems, the present invention has a refrigeration cycle in which a compressor, a condenser, a liquid receiver and an evaporator are connected in sequence, and during the cycle, 2 In a refrigeration cycle control device that uses a refrigerant and oil that become cloudy when the temperature exceeds the layer separation temperature, a detection unit that detects the refrigerant temperature or pressure on the discharge side of the compressor, and a switch that is operated when checking the refrigerant amount. A bypass passage that bypasses the liquid receiver, a normally-closed electromagnetic valve that opens and closes an inlet of the passage, a sight glass provided in the bypass passage, and control means, the control means comprising: After the switch is operated, when the refrigerant temperature or pressure detected by the detecting means is equal to or higher than the two-layer separation temperature or the pressure corresponding to the two-layer separation temperature, at least the fan of the condenser and the fan of the evaporator. The solenoid valve is opened when the detected refrigerant temperature or pressure is equal to or lower than the two-layer separation temperature or the pressure corresponding to the two-layer separation temperature. Has been done.
【０００６】[0006]
【作用】冷媒量のチェック時にスイッチが操作される
と、検出手段により検出される冷媒温度又は圧力が２層
分離温度又は２層分離温度に相当する圧力以上のとき、
制御手段は、少なくとも凝縮器のファン及び蒸発器のフ
ァンのいずれか一方を冷媒温度が下がる方向に変速す
る。これによって、検出される冷媒温度又は圧力が２層
分離温度又は２層分離温度に相当する圧力以下になった
とき、制御手段が電磁弁を開く。これによって、サイト
グラスのあるバイパス通路に冷媒が流れるので、サイト
グラスから白濁していない冷媒が見える。When the switch is operated when checking the amount of refrigerant, when the refrigerant temperature or pressure detected by the detecting means is equal to or higher than the two-layer separation temperature or the pressure corresponding to the two-layer separation temperature,
The control means shifts at least one of the condenser fan and the evaporator fan in a direction in which the refrigerant temperature decreases. Thereby, when the detected refrigerant temperature or pressure becomes equal to or lower than the two-layer separation temperature or the pressure corresponding to the two-layer separation temperature, the control means opens the solenoid valve. As a result, the refrigerant flows through the bypass passage having the sight glass, so that the non-cloudy refrigerant can be seen from the sight glass.
【０００７】[0007]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【０００８】図１は、本発明の一実施例に係る冷凍サイ
クル制御装置を示しており、この冷凍サイクル制御装置
は圧縮機１、凝縮器２、受液器３、膨張弁４及び蒸発器
５が順に接続されて成る冷凍サイクルを有する。この冷
凍サイクルでは、圧縮機１により圧縮された高温高圧の
冷媒は凝縮器２により冷却されて液体になり、この液状
冷媒は受液器３を経て膨張弁４に至り、ここで断熱膨張
して圧力が低くなり、蒸発器５内で蒸発熱を吸収して気
体になり、再び圧縮機１に流入する。また、この冷凍サ
イクルでは、２層分離温度以上になると白濁状態となる
冷媒とオイルとを使用する。例えば、冷媒としてはＲ１
３４ａのような代替冷媒を、オイルとしては二層分離温
度が約５０℃（同温度に相当する圧力が約１１．５kg/c
m2）である合成油を用いる。FIG. 1 shows a refrigeration cycle control apparatus according to an embodiment of the present invention. The refrigeration cycle control apparatus includes a compressor 1, a condenser 2, a liquid receiver 3, an expansion valve 4 and an evaporator 5. Has a refrigeration cycle which is connected in sequence. In this refrigeration cycle, the high-temperature and high-pressure refrigerant compressed by the compressor 1 is cooled by the condenser 2 into a liquid, and this liquid refrigerant reaches the expansion valve 4 via the liquid receiver 3 and is adiabatically expanded there. The pressure becomes low, and the heat of vaporization is absorbed in the evaporator 5 to become a gas, which then flows into the compressor 1 again. Further, in this refrigeration cycle, a refrigerant and an oil that become cloudy at a temperature of two-layer separation or higher are used. For example, as the refrigerant, R1
An alternative refrigerant such as 34a is used as oil and has a two-layer separation temperature of about 50 ° C (the pressure corresponding to the same temperature is about 11.5 kg / c.
m 2 ) is used.
【０００９】さらに、冷凍サイクル制御装置は、前記圧
縮機１の吐出側１ａの冷媒圧力を検出する圧力センサ６
と、冷媒量のチェック時に操作される冷媒量チェックス
イッチ７と、前記受液器３をバイパスするバイパス通路
８と、該通路８の入口を開閉する常閉の電磁弁９と、バ
イパス通路８中に設けられたサイトグラス１０と、冷媒
量のチェックが可能となったことを知らせるモニターラ
ンプ１１と、中央処理装置等を有するそれ自体公知のマ
イクロコンピュータから成る電子制御部（制御手段）２
０とを備えている。Further, the refrigeration cycle control device includes a pressure sensor 6 for detecting the refrigerant pressure on the discharge side 1a of the compressor 1.
A refrigerant amount check switch 7 that is operated when checking the amount of refrigerant, a bypass passage 8 that bypasses the liquid receiver 3, a normally closed solenoid valve 9 that opens and closes the inlet of the passage 8, and a bypass passage 8 An electronic control unit (control means) 2 including a sight glass 10 provided in the computer, a monitor lamp 11 for notifying that the amount of refrigerant can be checked, and a microcomputer known per se having a central processing unit and the like.
It has 0 and.
【００１０】前記電子制御部２０は、冷媒量チェックス
イッチ７の操作後、圧力センサ６によって検出される冷
媒圧力Ｐｄが２層分離温度（約５０℃）に相当する圧力
（約１１．５kg/cm2）以上のとき凝縮器２のファン２ａ
及び蒸発器５のファン５ａを冷媒圧力即ち冷媒温度が下
がる方向に変速すると共に、検出される冷媒圧力Ｐｄが
１１．５kg/cm2以下のとき、電磁弁９を開き、且つモニ
ターランプ１１を点灯させるように構成されている。After the operation of the refrigerant amount check switch 7, the electronic control unit 20 operates so that the refrigerant pressure Pd detected by the pressure sensor 6 corresponds to the two-layer separation temperature (about 50 ° C.) (about 11.5 kg / cm). 2 ) In the above case, the fan 2a of the condenser 2
Also, the fan 5a of the evaporator 5 is shifted in the direction in which the refrigerant pressure, that is, the refrigerant temperature is lowered, and when the detected refrigerant pressure Pd is 11.5 kg / cm 2 or less, the solenoid valve 9 is opened and the monitor lamp 11 is turned on. Is configured to let.
【００１１】次に上述した一実施例の作動を図２のフロ
ーチャートに従って説明する。Next, the operation of the above-described embodiment will be described with reference to the flowchart of FIG.
【００１２】まず、図示しないＡ／ＣスイッチをＯＮに
することによって電子制御部２０が作動を開始し、図２
のステップ２０１で冷媒量チェックスイッチ７がＯＮさ
れているか否かを判定する。この判定結果が否定（Ｎ
Ｏ）のとき、電子制御部２０は電磁弁９に通電せず、電
磁弁９を閉じた状態に保持し（ステップ２０２）、さら
にステップ２０３に進み、通常の冷凍サイクル運転を開
始する。この運転では、熱負荷に応じて、凝縮器２のフ
ァン２ａ、蒸発器５のファン５ａの風量、圧縮機１の吐
出量等が制御される。ステップ２０３で冷凍サイクル運
転を開始した後、ステップ２１０に進んでＡ／Ｃスイッ
チがＯＮされているか否かを判定する。このとき、Ａ／
ＣスイッチはＯＮされているので、ステップ２１０の判
定結果は肯定（ＹＥＳ）となって前記ステップ２０１に
戻る。First, the electronic control unit 20 starts its operation by turning on an A / C switch (not shown), and
In step 201, it is determined whether the refrigerant amount check switch 7 is turned on. This judgment result is negative (N
In the case of (O), the electronic control unit 20 does not energize the solenoid valve 9 and holds the solenoid valve 9 in a closed state (step 202), and further proceeds to step 203 to start the normal refrigeration cycle operation. In this operation, the air volume of the fan 2a of the condenser 2, the fan 5a of the evaporator 5, the discharge amount of the compressor 1 and the like are controlled according to the heat load. After starting the refrigeration cycle operation at step 203, the routine proceeds to step 210, where it is determined whether the A / C switch is ON. At this time, A /
Since the C switch is turned on, the determination result of step 210 becomes affirmative (YES), and the process returns to step 201.
【００１３】このような冷凍サイクル運転中に冷媒量チ
ェックスイッチ７がＯＮにされてステップ２０１の判定
結果が肯定（ＹＥＳ）になると、ステップ２０４に進ん
で圧力センサ６により検出される冷媒圧力Ｐｄを読込
む。この後、ステップ２０５に進んでステップ２０４で
読込んだ冷媒圧力Ｐｄが１１．５kg/cm2以上であるか否
かを判別する。このステップ２０５の判定結果が否定
（ＮＯ）のとき、すなわち冷媒圧力Ｐｄが１１．５kg/c
m2以下のとき、冷凍サイクル中の冷媒は白濁状態となっ
ていないので、電子制御部２０は、電磁弁９に通電して
電磁弁９を開く（ステップ２０８）と共に、モニターラ
ンプ１１を点灯させる（ステップ２０９）。When the refrigerant amount check switch 7 is turned on during such a refrigeration cycle operation and the determination result of step 201 becomes affirmative (YES), the routine proceeds to step 204, where the refrigerant pressure Pd detected by the pressure sensor 6 is set. Read in. After this, the routine proceeds to step 205, where it is judged if the refrigerant pressure Pd read at step 204 is 11.5 kg / cm 2 or more. When the determination result of step 205 is negative (NO), that is, the refrigerant pressure Pd is 11.5 kg / c.
When m 2 or less, the refrigerant in the refrigeration cycle is not clouded, so the electronic control unit 20 energizes the solenoid valve 9 to open the solenoid valve 9 (step 208) and turns on the monitor lamp 11. (Step 209).
【００１４】この点灯により、白濁していない冷媒がバ
イパス通路８中のサイトグラス１０に流れること、及び
冷媒量チェックが可能であることを作業者に知らせる。
したがって、作業者は、サイトグラス１０から白濁して
いない冷媒を目視でき、これによって冷媒充填量が適正
か否かを正しく判断できる。このとき、気泡が含まれて
いないときは適正と判断し、気泡が含まれているときは
冷媒量が不足していると判断して冷媒を充填する。By this lighting, the operator is informed that the non-white turbid refrigerant flows into the sight glass 10 in the bypass passage 8 and that the refrigerant amount can be checked.
Therefore, the operator can visually check the non-white turbid refrigerant from the sight glass 10, and thereby correctly determine whether the refrigerant charging amount is appropriate. At this time, when the bubbles are not included, it is determined to be appropriate, and when the bubbles are included, it is determined that the amount of the refrigerant is insufficient, and the refrigerant is charged.
【００１５】一方、前記ステップ２０５の判定結果が肯
定（ＹＥＳ）のとき、すなわち前記冷媒圧力Ｐｄが１
１．５kg/cm2以上のとき、冷媒サイクル中の冷媒は白濁
状態となっているので、電子制御部２０は、凝縮器２の
ファン２ａの風量を最大にする（ステップ２０６）と共
に、蒸発器５のファン５ａの風量を最小にする（ステッ
プ２０７）。これによって、冷凍サイクル中の冷媒圧力
即ち冷媒温度が低下していく。このような運転中に前記
ステップ２０１及び２０４を経てステップ２０５に再び
進んだとき、冷媒圧力Ｐｄが１１．５kg/cm2以下になっ
ていれば、ステップ２０５の判定結果が否定（ＮＯ）と
なる。このとき、電子制御部２０は、前記ステップ２０
８及び２０９を実行することにより、電磁弁９を開くと
共にモニターランプ１１を点灯させる。これによって上
述した場合と同様に、作業者は、冷媒量チェックが可能
であることを知り、サイトグラス１０から白濁していな
い冷媒を目視できる。On the other hand, when the determination result of step 205 is affirmative (YES), that is, the refrigerant pressure Pd is 1
When it is 1.5 kg / cm 2 or more, the refrigerant in the refrigerant cycle is in a cloudy state, so the electronic control unit 20 maximizes the air volume of the fan 2a of the condenser 2 (step 206) and the evaporator. The air volume of the fan 5a of No. 5 is minimized (step 207). As a result, the refrigerant pressure during the refrigeration cycle, that is, the refrigerant temperature, decreases. When the refrigerant pressure Pd is 11.5 kg / cm 2 or less when the operation proceeds to Step 205 again through Steps 201 and 204 during such operation, the determination result of Step 205 becomes negative (NO). .. At this time, the electronic control unit 20 determines
By executing steps 8 and 209, the solenoid valve 9 is opened and the monitor lamp 11 is turned on. As a result, similarly to the case described above, the operator knows that the refrigerant amount can be checked, and can visually check the non-cloudy refrigerant from the sight glass 10.
【００１６】このように、サイトグラス１０から白濁し
ていない状態の冷媒が目視されるので、白濁を冷媒量不
足による気泡と誤判定して冷媒を過充填することは無く
なる。As described above, since the refrigerant which is not clouded is visually observed from the sight glass 10, the cloudiness is not mistakenly judged to be bubbles due to the insufficient amount of the refrigerant, and the refrigerant is not overfilled.
【００１７】このようにして冷媒量をチェックした後
は、前記スイッチ７をＯＦＦにするので、前記ステップ
２０９からステップ２０１に戻ったとき、このステップ
２０１の判定結果が否定（ＮＯ）となり、電子制御部２
０はステップ２０２で電磁弁９を閉じ、さらにステップ
２０３に進んで通常の冷凍サイクル運転を続行する。そ
して、前記ステップ２１０に再び進んだとき、Ａ／Ｃス
イッチがＯＦＦになつていれば、その判定結果が否定
（ＮＯ）となって冷凍サイクル運転が終了する。After checking the amount of refrigerant in this way, the switch 7 is turned off. Therefore, when the process returns from the step 209 to the step 201, the determination result of the step 201 becomes negative (NO), and the electronic control is performed. Part 2
In step 0, the solenoid valve 9 is closed in step 202, and the routine proceeds to step 203 to continue the normal refrigeration cycle operation. If the A / C switch is off when the process proceeds to step 210 again, the determination result is negative (NO), and the refrigeration cycle operation ends.
【００１８】なお、本実施例では圧縮機１の吐出側１ａ
の冷媒圧力Ｐｄを圧力センサ６によって検出している
が、吐出側１ａの冷媒温度を温度センサで検出するよう
に構成してもよい。In this embodiment, the discharge side 1a of the compressor 1
Although the pressure Pd of the refrigerant is detected by the pressure sensor 6, the temperature of the refrigerant on the discharge side 1a may be detected by the temperature sensor.
【００１９】また、本実施例では、冷媒圧力Ｐｄが１
１．５kg/cm2以上の場合に凝縮器２のファン２ａの風量
が最大に及び蒸発器５のファン５ａの風量が最小になる
ように制御しているが、凝縮器２のファン２ａまたは蒸
発器５のファン５ａのいずれか一方を冷媒温度が下がる
方向に変速させてもよい。In this embodiment, the refrigerant pressure Pd is 1
When the air volume is 1.5 kg / cm 2 or more, the air volume of the fan 2a of the condenser 2 is controlled to be maximum and the air volume of the fan 5a of the evaporator 5 is minimized. Either one of the fans 5a of the container 5 may be shifted in the direction in which the refrigerant temperature decreases.
【００２０】[0020]
【効果】以上述べたように本発明の冷凍サイクル制御装
置によれば、冷媒量のチェック時にスイッチが操作され
ると、制御手段は、検出手段によって検出される冷媒温
度又は圧力が２層分離温度又は２層分離温度に相当する
圧力以上のとき、少なくとも凝縮器のファン及び蒸発器
のファンのいずれか一方を冷媒温度が下がる方向に変速
する。これによって、検出される冷媒温度又は圧力が２
層分離温度又は２層分離温度に相当する圧力以下になっ
たとき、制御手段は電磁弁を開く。その結果、サイトグ
ラスのあるバイパス通路に冷媒が流れるので、サイトグ
ラスから白濁していない冷媒が見える。したがって、冷
媒充填量のチェック時に、冷媒の白濁を冷媒量の不足に
よる気泡と誤判定することがなく、冷凍サイクルに冷媒
が過充填されるのを防止できる。As described above, according to the refrigeration cycle control device of the present invention, when the switch is operated at the time of checking the refrigerant amount, the control means causes the refrigerant temperature or pressure detected by the detection means to be the two-layer separation temperature. Alternatively, when the pressure is equal to or higher than the two-layer separation temperature, at least one of the condenser fan and the evaporator fan is shifted in the direction in which the refrigerant temperature decreases. As a result, the detected refrigerant temperature or pressure is 2
When the pressure falls below the layer separation temperature or the two-layer separation temperature, the control means opens the solenoid valve. As a result, since the refrigerant flows through the bypass passage having the sight glass, the refrigerant which is not clouded can be seen from the sight glass. Therefore, at the time of checking the refrigerant charging amount, it is possible to prevent the refrigerant turbidity from being erroneously determined to be bubbles due to a shortage of the refrigerant amount, and prevent the refrigeration cycle from being overfilled with the refrigerant.
【図１】本考案の一実施例に係る冷凍サイクル制御装置
を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing a refrigeration cycle control device according to an embodiment of the present invention.
【図２】本実施例における電子制御部の制御内容を示す
フローチャートである。FIG. 2 is a flowchart showing control contents of an electronic control unit in the present embodiment.
１ 圧縮機 １ａ 圧縮機の吐出側 ２ 凝縮器 ２ａ 凝縮器のファン ３ 受液器 ５ 蒸発器 ５ａ 蒸発器のファン ６ 圧力センサ（検出手段） ７ 冷媒量チェックスイッチ ８ バイパス通路 ９ 電磁弁 １０ サイトグラス ２０ 電子制御部（制御手段） 1 compressor 1a discharge side of compressor 2 condenser 2a condenser fan 3 receiver 5 evaporator 5a evaporator fan 6 pressure sensor (detection means) 7 refrigerant amount check switch 8 bypass passage 9 solenoid valve 10 sight glass 20 electronic control unit (control means)
Claims (1)
に接続されて成る冷凍サイクルを有し、該サイクル中
に、２層分離温度以上になると白濁状態となる冷媒とオ
イルとを用いる冷凍サイクル制御装置において、前記圧
縮機の吐出側の冷媒温度又は圧力を検出する検出手段
と、冷媒量のチェック時に操作されるスイッチと、前記
受液器をバイパスするバイパス通路と、該通路の入り口
を開閉する常閉の電磁弁と、前記バイパス通路中に設け
られたサイトグラスと、制御手段とを備え、該制御手段
は、前記スイッチの操作後、前記検出手段により検出さ
れる冷媒温度又は圧力が２層分離温度又は２層分離温度
に相当する圧力以上のとき、少なくとも前記凝縮器のフ
ァン及び前記蒸発器のファンのいずれか一方を冷媒温度
が下がる方向に変速すると共に、前記検出される冷媒温
度又は圧力が２層分離温度又は２層分離温度に相当する
圧力以下のとき、前記電磁弁を開くように構成されてい
ることを特徴とする冷凍サイクル制御装置。1. A refrigeration cycle comprising a compressor, a condenser, a liquid receiver, and an evaporator, which are connected in sequence, and a refrigerant and an oil which become cloudy at a temperature of two-layer separation or higher during the cycle. In the refrigeration cycle control device used, detection means for detecting the refrigerant temperature or pressure on the discharge side of the compressor, a switch operated at the time of checking the refrigerant amount, a bypass passage bypassing the liquid receiver, and a passage of the passage. A normally closed solenoid valve for opening and closing the inlet, a sight glass provided in the bypass passage, and a control means are provided, and the control means, after the operation of the switch, the refrigerant temperature or the refrigerant temperature detected by the detection means. When the pressure is equal to or higher than the two-layer separation temperature or the pressure corresponding to the two-layer separation temperature, at least one of the condenser fan and the evaporator fan is shifted in the direction in which the refrigerant temperature decreases. At the same time, the refrigeration cycle control device is configured to open the electromagnetic valve when the detected refrigerant temperature or pressure is equal to or lower than the two-layer separation temperature or the pressure corresponding to the two-layer separation temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27321791A JP2869904B2 (en) | 1991-09-25 | 1991-09-25 | Refrigeration cycle control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27321791A JP2869904B2 (en) | 1991-09-25 | 1991-09-25 | Refrigeration cycle control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0587429A true JPH0587429A (en) | 1993-04-06 |
| JP2869904B2 JP2869904B2 (en) | 1999-03-10 |
Family
ID=17524741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27321791A Expired - Lifetime JP2869904B2 (en) | 1991-09-25 | 1991-09-25 | Refrigeration cycle control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2869904B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100403023B1 (en) * | 2000-06-09 | 2003-10-23 | 삼성전자주식회사 | Outdoor fan control system of air conditioner and control method thereof |
| JP2009115340A (en) * | 2007-11-02 | 2009-05-28 | Hitachi Appliances Inc | Air conditioner |
| JP2010007993A (en) * | 2008-06-27 | 2010-01-14 | Daikin Ind Ltd | Refrigerant amount determining method of air conditioning device, and air conditioning device |
| WO2010047421A1 (en) * | 2008-10-23 | 2010-04-29 | サンデン株式会社 | Refrigeration cycle system and automotive air conditioning system using said refrigeration cycle system |
| CN103234341A (en) * | 2013-05-14 | 2013-08-07 | 楚天科技股份有限公司 | Dyer and device for detecting working state of draught fan of dryer and dryer |
| CN104833039A (en) * | 2014-02-12 | 2015-08-12 | 苏州三星电子有限公司 | Air conditioner |
-
1991
- 1991-09-25 JP JP27321791A patent/JP2869904B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100403023B1 (en) * | 2000-06-09 | 2003-10-23 | 삼성전자주식회사 | Outdoor fan control system of air conditioner and control method thereof |
| JP2009115340A (en) * | 2007-11-02 | 2009-05-28 | Hitachi Appliances Inc | Air conditioner |
| JP2010007993A (en) * | 2008-06-27 | 2010-01-14 | Daikin Ind Ltd | Refrigerant amount determining method of air conditioning device, and air conditioning device |
| WO2010047421A1 (en) * | 2008-10-23 | 2010-04-29 | サンデン株式会社 | Refrigeration cycle system and automotive air conditioning system using said refrigeration cycle system |
| JP2010101553A (en) * | 2008-10-23 | 2010-05-06 | Sanden Corp | Refrigerating cycle system and air-conditioning system for vehicle using the refrigerating cycle system |
| CN103234341A (en) * | 2013-05-14 | 2013-08-07 | 楚天科技股份有限公司 | Dyer and device for detecting working state of draught fan of dryer and dryer |
| CN104833039A (en) * | 2014-02-12 | 2015-08-12 | 苏州三星电子有限公司 | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2869904B2 (en) | 1999-03-10 |
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