JP2001133014A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2001133014A JP2001133014A JP31082899A JP31082899A JP2001133014A JP 2001133014 A JP2001133014 A JP 2001133014A JP 31082899 A JP31082899 A JP 31082899A JP 31082899 A JP31082899 A JP 31082899A JP 2001133014 A JP2001133014 A JP 2001133014A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- outdoor unit
- outdoor
- units
- unit
- 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
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複数台の室外ユニ
ットを室内ユニットから延びるユニット間配管に並列に
つないだ空気調和装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which a plurality of outdoor units are connected in parallel to an interunit pipe extending from an indoor unit.
【０００２】[0002]
【従来の技術】一般に、複数台の室外ユニットと複数台
の室内ユニットとを同一系統の冷媒配管で接続した空気
調和装置が知られている。この種のものでは各ユニット
が同一系統の冷媒配管で接続されているので、停止中の
室外ユニットに冷媒が寝込み、運転中の室外ユニットに
冷媒不足（ガス欠）が発生するおそれがある。2. Description of the Related Art In general, there is known an air conditioner in which a plurality of outdoor units and a plurality of indoor units are connected by the same refrigerant pipe. In this type, since the units are connected by the same system of refrigerant pipes, the refrigerant may stagnate in the stopped outdoor unit and the running outdoor unit may run out of refrigerant (gas shortage).
【０００３】このガス欠が発生した場合、従来では、停
止中の室外ユニットはその運転を停止したまま、いわゆ
るオイル回収用のバランス管を用いて、この停止中の室
外ユニットから運転中の室外ユニットに冷媒回収する制
御が実行される。[0003] When this gas shortage occurs, in the related art, the stopped outdoor unit is operated from the stopped outdoor unit using a so-called oil recovery balance pipe while the operation of the stopped outdoor unit is stopped. The control for recovering the refrigerant is executed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
構成では、停止中の室外ユニットから運転中の室外ユニ
ットに冷媒回収するため、複雑な配管と複数の開閉弁と
が必要になると共に、各開閉弁を開閉させる複雑な制御
が必要になるという問題がある。However, in the conventional configuration, in order to collect the refrigerant from the stopped outdoor unit to the operating outdoor unit, complicated piping and a plurality of on-off valves are required, and each open-close valve is required. There is a problem that complicated control for opening and closing the valve is required.
【０００５】また、従来の構成では、停止中の室外ユニ
ットに寝込んだ冷媒をいわゆるバランス管を用いて運転
中の室外ユニットの圧縮機の吸込圧によって吸引回収し
ているために冷媒回収に長時間がかかるという問題があ
る。Further, in the conventional structure, the refrigerant laid down in the stopped outdoor unit is suctioned and recovered by the suction pressure of the compressor of the operating outdoor unit using a so-called balance pipe, so that it takes a long time to recover the refrigerant. There is a problem that it takes.
【０００６】そこで、本発明の目的は、上述した従来の
技術が有する課題を解消し、短時間の内に確実に冷媒回
収を実行することができ、しかも配管の簡素化及び制御
の簡素化を図ることができる空気調和装置を提供するこ
とにある。Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, to make it possible to reliably recover refrigerant in a short time, and to simplify piping and control. An object of the present invention is to provide an air conditioner that can be achieved.
【０００７】[0007]
【課題を解決するための手段】請求項１記載の発明は、
複数台の室外ユニットと複数台の室内ユニットとを同一
系統の冷媒配管で接続した空気調和装置において、運転
中の一方の室外ユニットと停止中の他方の室外ユニット
とが存在し、運転中の一方の室外ユニットに冷媒不足が
発生した場合、停止中の他方の室外ユニットを運転させ
て、この他方の室外ユニットに寝込んだ冷媒を一方の室
外ユニットに回収する制御手段を備えたことを特徴とす
るものである。According to the first aspect of the present invention,
In an air conditioner in which a plurality of outdoor units and a plurality of indoor units are connected by the same refrigerant pipe, there is one outdoor unit in operation and the other outdoor unit in a stop state, and one in operation. When there is a shortage of refrigerant in the outdoor unit, control means is provided for operating the other stopped outdoor unit and recovering the refrigerant laid down in the other outdoor unit in the one outdoor unit. Things.
【０００８】請求項２記載の発明は、複数台の室外ユニ
ットと複数台の室内ユニットとを同一系統の冷媒配管で
接続した空気調和装置において、運転中の一方の室外ユ
ニットと停止中の他方の室外ユニットとが存在し、運転
中の一方の室外ユニットに冷媒不足が発生した場合、停
止中の他方の室外ユニットを運転させ、運転中の一方の
室外ユニットを停止させて、前記他方の室外ユニットに
寝込んだ冷媒を一方の室外ユニットに回収する制御手段
を備えたことを特徴とするものである。According to a second aspect of the present invention, in an air conditioner in which a plurality of outdoor units and a plurality of indoor units are connected by the same refrigerant pipe, one of the outdoor units being operated and the other being stopped are provided. When there is an outdoor unit and one of the operating outdoor units runs out of refrigerant, the other outdoor unit being stopped is operated, the one outdoor unit being operated is stopped, and the other outdoor unit is stopped. And a control means for collecting the refrigerant that has fallen into the outdoor unit in one of the outdoor units.
【０００９】請求項３記載の発明は、複数台の室外ユニ
ットと複数台の室内ユニットとを同一系統の冷媒配管で
接続した空気調和装置において、運転中の一方の室外ユ
ニットと停止中の他方の室外ユニットとが存在し、運転
中の一方の室外ユニットに冷媒不足が発生した場合、停
止中の他方の室外ユニットを運転させ、運転中の一方の
室外ユニットと所定時間並列運転させて、前記他方の室
外ユニットに寝込んだ冷媒を一方の室外ユニットに回収
する制御手段を備えたことを特徴とするものである。According to a third aspect of the present invention, in an air conditioner in which a plurality of outdoor units and a plurality of indoor units are connected by the same refrigerant pipe, one of the outdoor units being operated and the other being stopped are provided. When there is an outdoor unit and one of the outdoor units in operation runs short of refrigerant, the other outdoor unit being stopped is operated, and the one outdoor unit being operated is operated in parallel with the other outdoor unit for a predetermined time, and the other unit is operated in parallel. And control means for collecting the refrigerant laid down in the outdoor unit in one of the outdoor units.
【００１０】[0010]
【発明の実施の形態】以下、本発明の一実施形態を添付
の図面を参照して説明する。An embodiment of the present invention will be described below with reference to the accompanying drawings.
【００１１】図１において、１ａ，１ｂは室外ユニット
を示し、３ａ，３ｂは室内ユニットを示している。室外
ユニット１ａは、アキュームレータ１０ａと、ガスエン
ジン駆動による圧縮機１１ａと、オイルセパレータ１２
ａと、四方弁１３ａと、室外熱交換器１４ａと、室外電
動式膨脹弁１５ａとで構成されている。なお、１７ａは
室外熱交換器１４ａのファンである。室外ユニット１ｂ
については、以下の構成を含めて、室外ユニット１ａと
同じであるので、説明を省略する。In FIG. 1, 1a and 1b denote outdoor units, and 3a and 3b denote indoor units. The outdoor unit 1a includes an accumulator 10a, a compressor 11a driven by a gas engine, and an oil separator 12a.
a, a four-way valve 13a, an outdoor heat exchanger 14a, and an outdoor electric expansion valve 15a. In addition, 17a is a fan of the outdoor heat exchanger 14a. Outdoor unit 1b
Is the same as that of the outdoor unit 1a, including the following configuration, and the description thereof is omitted.
【００１２】また、室内ユニット３ａは、室内熱交換器
３４ａと、室内電動式膨脹弁３５ａ（以下「室内メカ弁
３５ａ」という。）とで構成されている。なお、室内ユ
ニット３ｂについては、以下の構成を含めて、室内ユニ
ット３ａと同じであるので、説明を省略する。この室内
ユニット３ａ，３ｂからは、ガス管５及び液管７からな
るユニット間配管が延び出し、このユニット間配管に
は、室外ユニット１ａ，１ｂが並列に接続されている。The indoor unit 3a includes an indoor heat exchanger 34a and an indoor electric expansion valve 35a (hereinafter, referred to as an "indoor mechanical valve 35a"). Note that the indoor unit 3b is the same as the indoor unit 3a, including the following configuration, and a description thereof will be omitted. From this indoor unit 3a, 3b, an inter-unit pipe composed of a gas pipe 5 and a liquid pipe 7 extends, and outdoor units 1a, 1b are connected in parallel to this inter-unit pipe.
【００１３】オイルセパレータ１２ａは、圧縮機１１ａ
から吐出される冷媒中の潤滑油を分離するものであり、
ここで分離された潤滑油は常時オイル戻し管２１ａと強
制オイル戻し管２２ａとを通じて圧縮機１１ａに戻され
る。常時オイル戻し管２１ａにはキャピラリーチューブ
２４ａが設けられ、このキャピラリーチューブ２４ａに
よって圧縮機１１ａに戻されるオイルに流路抵抗がかけ
られる。この常時オイル戻し管２１ａはオイルセパレー
タ１２ａの中程につながれ、これがつながれた位置より
もオイルセパレータ１２ａ内のオイルの油面が上回る限
りにおいて、この常時オイル戻し管２１ａを通じてオイ
ルが常時圧縮機１１ａの吸込管に戻される。強制オイル
戻し管２２ａには開閉弁２３ａ，２５ａが設けられる。
この強制オイル戻し管２２ａは、オイルセパレータ１２
ａの底部につながれ、開閉弁２３ａ，２５ａを開くこと
によってオイルセパレータ１２ａ内のオイルが強制的に
圧縮機１１ａの吸込管に戻される。The oil separator 12a includes a compressor 11a
To separate the lubricating oil in the refrigerant discharged from the
The lubricating oil separated here is always returned to the compressor 11a through the oil return pipe 21a and the forced oil return pipe 22a. A capillary tube 24a is always provided in the oil return pipe 21a, and a flow path resistance is applied to oil returned to the compressor 11a by the capillary tube 24a. This constant oil return pipe 21a is connected in the middle of the oil separator 12a, and as long as the oil level of the oil in the oil separator 12a is higher than the position where the oil return pipe 21a is connected, the oil is constantly supplied to the compressor 11a through the constant oil return pipe 21a. It is returned to the suction pipe. On-off valves 23a and 25a are provided in the forced oil return pipe 22a.
The forced oil return pipe 22a is connected to the oil separator 12
The oil in the oil separator 12a is forcibly returned to the suction pipe of the compressor 11a by opening the on-off valves 23a and 25a.
【００１４】室外ユニット１ａ，１ｂの強制オイル戻し
管２２ａ，２２ｂどうしは、バランス管５１によりつな
がれる。このバランス管５１は、第３の補助管５３ａを
通じて、四方弁１３ａとチェッキ弁１８ａとの間につな
がれ、第３の補助管５３ａには第３の開閉弁５５ａが設
けられる。The forced oil return pipes 22a and 22b of the outdoor units 1a and 1b are connected by a balance pipe 51. The balance pipe 51 is connected between the four-way valve 13a and the check valve 18a through a third auxiliary pipe 53a, and the third auxiliary pipe 53a is provided with a third on-off valve 55a.
【００１５】第３の開閉弁５５ａが開き、四方弁１３ａ
が図示の位置に切り替わると、バランス管５１は室外熱
交換器１４ａに連通する。The third on-off valve 55a opens, and the four-way valve 13a
Is switched to the illustrated position, the balance pipe 51 communicates with the outdoor heat exchanger 14a.
【００１６】上記構成の空気調和装置において、本実施
形態では、圧縮機１１ａ，１１ｂの冷媒吸込温度を検出
する吸込温度センサＳａと、圧縮機１１ａ，１１ｂの冷
媒吐出温度を検出する吐出温度センサＳｂとが設けら
れ、各センサＳａ、Ｓｂによって室外ユニット１ａ，１
ｂにおける冷媒不足（ガス欠）が検出される。In the air conditioner having the above configuration, in this embodiment, a suction temperature sensor Sa for detecting the refrigerant suction temperature of the compressors 11a and 11b and a discharge temperature sensor Sb for detecting the refrigerant discharge temperature of the compressors 11a and 11b. Is provided, and the outdoor units 1a, 1
Insufficient refrigerant (gas shortage) in b is detected.
【００１７】すなわち、ガス欠が発生すると、室外ユニ
ット１ａ，１ｂ内の冷媒温度が上昇して、各センサＳ
ａ、Ｓｂの検出温度が上昇するため、その検出温度が一
定温度以上に上昇した場合、「ガス欠」の発生が検出さ
れる。That is, when a gas shortage occurs, the temperature of the refrigerant in the outdoor units 1a and 1b rises, and each sensor S
Since the detected temperatures of a and Sb rise, if the detected temperature rises above a certain temperature, the occurrence of "out of gas" is detected.
【００１８】つぎに、室外ユニット間の冷媒回収につい
て説明する。Next, the refrigerant recovery between the outdoor units will be described.
【００１９】この実施形態では、同一システム内に運転
中の一方の室外ユニットと停止中の他方の室外ユニット
とが存在することが前提となる。この停止中の他方の室
外ユニットに寝込んだ冷媒を回収するための制御だから
である。In this embodiment, it is assumed that one outdoor unit that is operating and the other outdoor unit that is stopped are present in the same system. This is because the control is for recovering the refrigerant that has fallen into the other outdoor unit during the stop.
【００２０】図３は冷媒回収時の処理フローである。FIG. 3 is a processing flow at the time of refrigerant recovery.
【００２１】まず、運転中の一方の室外ユニット（例え
ば、室外ユニット１ａ）と停止中の他方の室外ユニット
（例えば、室外ユニット１ｂ）とが存在するか否かが判
定され（Ｓ１）、存在しない場合、本制御は実行されな
い。両ユニットが存在する場合、運転中の一方の室外ユ
ニット１ａにガス欠が発生しているか否かが判定される
（Ｓ２）。この判定は、各センサＳａ、Ｓｂの検出温度
が一定温度以上に上昇した場合、ガス欠が発生したと判
定される。First, it is determined whether there is one outdoor unit (eg, the outdoor unit 1a) in operation and the other outdoor unit (eg, the outdoor unit 1b) being stopped (S1). In this case, this control is not executed. If both units are present, it is determined whether or not one of the outdoor units 1a being operated is out of gas (S2). In this determination, when the detected temperature of each of the sensors Sa and Sb rises to a certain temperature or higher, it is determined that a gas shortage has occurred.
【００２２】運転中の一方の室外ユニット１ａにガス欠
が発生した場合、停止中の他方の室外ユニット１ｂから
冷媒を回収するため、この停止中の他方の室外ユニット
１ｂを運転する（Ｓ３）。また、それと同時に、この他
方の室外ユニット１ｂと運転中の一方の室外ユニット１
ａとを並列運転させる（Ｓ４）。When a gas shortage occurs in one of the operating outdoor units 1a, the stopped outdoor unit 1b is operated to recover the refrigerant from the stopped outdoor unit 1b (S3). At the same time, the other outdoor unit 1b and the one outdoor unit 1 in operation are simultaneously operated.
a is operated in parallel (S4).
【００２３】そして、例えば５分間が経過したか否かが
判定され（Ｓ５）、この５分間が経過するまで、並列運
転が実行される。Then, for example, it is determined whether or not five minutes have elapsed (S5), and the parallel operation is performed until the five minutes have elapsed.
【００２４】５分間としたのは、このオイル回収制御で
は、運転中の室外ユニット１ａ以外に、停止中の室外ユ
ニット１ｂを強制的に運転するため、室外ユニット側の
全体能力が、室内ユニット側の要求能力以上に増大し、
能力のバランスが崩れて、最大５分程度しか運転を継続
できないためである。The reason for the five minutes is that in this oil recovery control, the stopped outdoor unit 1b is forcibly operated in addition to the running outdoor unit 1a, so that the overall capacity of the outdoor unit is reduced to the indoor unit side. More than the required capacity of
This is because the balance of the performance is lost and the operation can be continued for only about 5 minutes at the maximum.
【００２５】この実施形態では、上記の冷媒回収制御を
実行することによって、図１（冷房運転時の冷媒回
路。）に点線の矢印で示すように冷媒が移動して、他方
の室外ユニット１ｂに寝込んだ冷媒が、ガス欠の発生し
た一方の室外ユニット１ａに回収される。すなわち、冷
媒は、他方の室外ユニット１ｂの室外熱交換器１４ｂに
寝込んでおり、ここに寝込んだ冷媒は、圧縮機１１ｂの
吐出圧力で押し流され、ここから点線の矢印で示すよう
に移動し、室内ユニット３ａ，３ｂ、一方の室外ユニッ
ト１ａの四方弁１３ａ、アキュームレータ１０ａの順に
流れて、圧縮機１１ａの吸込管に回収される。In this embodiment, by performing the above-described refrigerant recovery control, the refrigerant moves as shown by the dotted arrow in FIG. 1 (refrigerant circuit during cooling operation), and the refrigerant moves to the other outdoor unit 1b. The refrigerant that has fallen asleep is collected in one of the outdoor units 1a in which the lack of gas has occurred. That is, the refrigerant is laid down in the outdoor heat exchanger 14b of the other outdoor unit 1b, and the laid-down refrigerant is swept away by the discharge pressure of the compressor 11b, and moves therefrom as indicated by the dotted arrow, The air flows through the indoor units 3a and 3b, the four-way valve 13a of the one outdoor unit 1a, and the accumulator 10a in this order, and is collected by the suction pipe of the compressor 11a.
【００２６】この場合、冷媒が寝込んでいる室外ユニッ
ト１ｂの冷媒圧力は、ガス欠の発生した室外ユニット１
ａの冷媒圧力よりも高くなる。従って、冷媒回収中に
は、冷媒が寝込んでいる室外ユニット１ｂに冷媒が流入
することはなく、冷媒のほとんどがガス欠の発生した室
外ユニット１ａに回収され、所定時間並列運転後、両室
外ユニット１ａ，１ｂ間の負荷率が一定になる。In this case, the refrigerant pressure of the outdoor unit 1b in which the refrigerant is laid down is reduced by the outdoor unit 1b where the gas shortage has occurred.
It becomes higher than the refrigerant pressure of a. Therefore, during the refrigerant recovery, the refrigerant does not flow into the outdoor unit 1b in which the refrigerant is laid down, and most of the refrigerant is recovered to the outdoor unit 1a where the gas shortage has occurred. The load factor between 1a and 1b becomes constant.
【００２７】図２は暖房運転時の冷媒回路図である。図
３に示す処理フローは、冷房時の処理も暖房時の処理も
同じであり、処理が実行されると、暖房時には、図２に
点線矢印で示すように冷媒が移動して、他方の室外ユニ
ット１ｂに寝込んだ冷媒が、ガス欠の発生した一方の室
外ユニット１ａに回収される。FIG. 2 is a refrigerant circuit diagram during the heating operation. The processing flow shown in FIG. 3 is the same as the processing at the time of cooling and the processing at the time of heating. When the processing is executed, at the time of heating, the refrigerant moves as shown by a dotted arrow in FIG. The refrigerant that has fallen into the unit 1b is collected by the one outdoor unit 1a where the gas shortage has occurred.
【００２８】この場合も、冷媒は、他方の室外ユニット
１ｂの室外熱交換器１４ｂに寝込んでいる。この空調シ
ステムが暖房運転されると、室外ユニット１ｂの圧縮機
１１ｂからの冷媒は、四方弁１３ｂを通じて、点線の矢
印で示すように移動し、室内ユニット３ａ，３ｂ、一方
の室外ユニット１ａの室内電動式膨張弁１５ａ、室外熱
交換器１４ａ、四方弁１３ａ、アキュームレータ１０ａ
の順に流れて、圧縮機１１ａの吸込管に戻される。Also in this case, the refrigerant is laid down in the outdoor heat exchanger 14b of the other outdoor unit 1b. When the air-conditioning system is operated for heating, the refrigerant from the compressor 11b of the outdoor unit 1b moves as indicated by a dotted arrow through the four-way valve 13b, and the indoor units 3a and 3b, the indoor unit of one of the outdoor units 1a. Electric expansion valve 15a, outdoor heat exchanger 14a, four-way valve 13a, accumulator 10a
And returned to the suction pipe of the compressor 11a.
【００２９】この場合、冷媒が寝込んでいる室外ユニッ
ト１ｂの冷媒圧力は、ガス欠の発生した室外ユニット１
ａの冷媒圧力よりも高くなるので、冷媒回収中には冷媒
のほとんどがガス欠の発生した室外ユニット１ａに回収
され、所定時間並列運転後、両室外ユニット１ａ，１ｂ
間の負荷率が一定になる。In this case, the pressure of the refrigerant in the outdoor unit 1b in which the refrigerant is laid down is the same as the outdoor unit 1 in which the gas shortage has occurred.
Since the refrigerant pressure becomes higher than the refrigerant pressure of the outdoor units 1a and 1b, almost all of the refrigerant is recovered to the outdoor unit 1a where the gas shortage has occurred during the refrigerant recovery.
The load factor between them becomes constant.
【００３０】この実施形態では、冷媒が寝込んでいる室
外ユニット１ｂに冷媒がほとんど戻らないため、その圧
縮機１１ｂのサクション圧力によって、室外熱交換器１
４ｂに寝込んだ冷媒が吸い出され、点線の矢印で示すよ
うに、四方弁１３ｂ、アキュームレータ１０ｂの順に流
れて、圧縮機１１ｂの吸込管に戻され、この圧縮機１１
ｂから吐出されて、上述したように、一方の室外ユニッ
ト１ａの圧縮機１１ａの吸込管に回収される。In this embodiment, since the refrigerant hardly returns to the outdoor unit 1b in which the refrigerant is stored, the suction pressure of the compressor 11b causes the outdoor heat exchanger 1 to operate.
The refrigerant that has fallen into 4b is sucked out, flows in the order of the four-way valve 13b and the accumulator 10b, and is returned to the suction pipe of the compressor 11b, as shown by the dotted arrow.
b, and is collected in the suction pipe of the compressor 11a of one of the outdoor units 1a as described above.
【００３１】この実施形態では、冷房運転時も暖房運転
時も、通常運転モードの上で冷媒移動が行われるため、
従来の圧縮機の吸込圧によって吸引回収する制御に比
べ、冷媒回収を短時間で行うことができる。In this embodiment, the refrigerant moves in the normal operation mode during both the cooling operation and the heating operation.
Refrigerant recovery can be performed in a shorter time as compared with the conventional control of suction recovery by suction pressure of a compressor.
【００３２】また、通常冷媒回路を通じて、冷媒移動が
行われるため、従来のように複雑な配管と複数の開閉弁
とが必要になることはなく、各開閉弁を開閉させる複雑
な制御も必要になり、コストダウンが図られる。Further, since the refrigerant is normally moved through the refrigerant circuit, complicated piping and a plurality of on-off valves are not required as in the prior art, and complicated control for opening and closing each on-off valve is also required. And cost reduction is achieved.
【００３３】上記実施形態では、ガス欠が発生した室外
ユニットと冷媒が寝込んだ室外ユニットとを冷媒回収制
御時に５分程度の所定時間並列運転させているが、これ
に限定されず、冷媒が寝込んだ室外ユニットだけを運転
し、ガス欠が発生した室外ユニットを運転停止させても
よい。In the above-described embodiment, the outdoor unit in which the gas shortage has occurred and the outdoor unit in which the refrigerant has stagnated are operated in parallel for a predetermined time of about 5 minutes during the refrigerant recovery control. However, the present invention is not limited to this. Only the outdoor unit may be operated, and the operation of the outdoor unit in which the gas shortage has occurred may be stopped.
【００３４】ガス欠が発生した室外ユニット１ａの冷媒
圧力は、上述のように、冷媒が寝込んだ室外ユニット１
ｂの冷媒圧力よりも低圧力である。As described above, the refrigerant pressure of the outdoor unit 1a in which the gas shortage has occurred is determined as described above.
The pressure is lower than the refrigerant pressure of b.
【００３５】従って、冷房運転時には、図１を参照し
て、室内ユニット３を経た冷媒が、冷媒が寝込んだ室外
ユニット１ｂに戻ることはなく、ほとんどがガス欠の発
生した室外ユニット１ａに戻される。これによれば、ガ
ス欠が発生した室外ユニット１ａは運転停止しても、室
外ユニット１ａ，１ｂ間の冷媒圧力差によって、室外ユ
ニット１ｂからの冷媒回収が可能になる。Therefore, during the cooling operation, referring to FIG. 1, the refrigerant that has passed through the indoor unit 3 does not return to the outdoor unit 1b in which the refrigerant has stagnated, but is mostly returned to the outdoor unit 1a in which a gas shortage has occurred. . According to this, even if the operation of the outdoor unit 1a in which the gas shortage has occurred is stopped, the refrigerant can be recovered from the outdoor unit 1b due to the refrigerant pressure difference between the outdoor units 1a and 1b.
【００３６】暖房運転時において、ガス欠が発生した室
外ユニット１ａを停止させて冷媒回収を行う場合、図２
を参照して、室内電動式膨張弁１５ａを開く。室内ユニ
ットからの戻り冷媒は、上記のように、ほとんどガス欠
の発生した室外ユニット１ａに戻されるので、室内電動
式膨張弁１５ａが開かれていれば、この戻り冷媒の圧力
で、室外熱交換器１４ａ、四方弁１３ａ、アキュームレ
ータ１０ａの順に流れて、圧縮機１１ａの吸込管に回収
される。In the heating operation, when the outdoor unit 1a in which the gas shortage has occurred is stopped to collect the refrigerant, FIG.
, The indoor electric expansion valve 15a is opened. As described above, the refrigerant returned from the indoor unit is returned to the outdoor unit 1a where almost no gas is generated. Therefore, if the indoor electric expansion valve 15a is opened, the outdoor heat exchange is performed by the pressure of the returned refrigerant. It flows in the order of the compressor 14a, the four-way valve 13a, and the accumulator 10a, and is collected in the suction pipe of the compressor 11a.
【００３７】これによれば、ガス欠が発生した室外ユニ
ット１ａは運転を停止したとしても、室外ユニット１
ａ，１ｂ間の冷媒圧力差によって、室外ユニット１ｂか
らの冷媒回収が可能になる。According to this, even if the operation of the outdoor unit 1a in which the gas shortage has occurred is stopped, the outdoor unit 1a does not operate.
The refrigerant pressure difference between a and 1b enables the refrigerant to be recovered from the outdoor unit 1b.
【００３８】以上、一実施形態に基づいて本発明を説明
したが、本発明は、これに限定されるものでないことは
明らかである。Although the present invention has been described based on one embodiment, it is apparent that the present invention is not limited to this.
【００３９】[0039]
【発明の効果】本発明では、冷房運転時も暖房運転時
も、通常運転モードの上で冷媒移動が行われるため、従
来の圧縮機の吸込圧によって吸引回収する制御に比べ、
冷媒回収を短時間で行うことができる。According to the present invention, the refrigerant is moved in the normal operation mode in both the cooling operation and the heating operation, so that the refrigerant is suctioned and recovered by the suction pressure of the conventional compressor.
Refrigerant recovery can be performed in a short time.
【００４０】また、通常冷媒回路を通じて、冷媒移動が
行われるため、従来のように複雑な配管と複数の開閉弁
とが必要になることはなく、各開閉弁を開閉させる複雑
な制御も必要になり、コストダウンが図られる。Further, since the refrigerant is normally moved through the refrigerant circuit, complicated piping and a plurality of on-off valves are not required as in the prior art, and complicated control for opening and closing each on-off valve is also required. And cost reduction is achieved.
【図１】本発明による空気調和装置の一例を示す冷房運
転時の系統図である。FIG. 1 is a system diagram illustrating an example of an air conditioner according to the present invention during a cooling operation.
【図２】同じく暖房運転時の系統図である。FIG. 2 is a system diagram during a heating operation.
【図３】一実施形態の処理フローを示すフローチャート
である。FIG. 3 is a flowchart illustrating a processing flow according to an embodiment;
１ａ，１ｂ 室外ユニット ３ａ，３ｂ 室内ユニット ５ ガス管 ７ 液管 １０ａ，１０ｂ アキュームレータ １１ａ，１１ｂ 圧縮機 １２ａ，１２ｂ オイルセパレータ １４ａ，１４ｂ 室外熱交換器 ２１ａ，２１ｂ 戻し管 Ｓａ、Ｓｂ センサ 1a, 1b Outdoor unit 3a, 3b Indoor unit 5 Gas pipe 7 Liquid pipe 10a, 10b Accumulator 11a, 11b Compressor 12a, 12b Oil separator 14a, 14b Outdoor heat exchanger 21a, 21b Return pipe Sa, Sb Sensor
フロントページの続き (72)発明者 粂原 一夫 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 進藤 章 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 東 孝美 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 中村 由浩 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 平田 亮太 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 松栄 準治 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 永江 公二 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 Ｆターム(参考） 3L060 AA02 CC04 DD01 Continued on the front page (72) Inventor Kazuo Kumehara 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Akira Shindo 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Inside Sanyo Electric Co., Ltd. (72) Takami Higashi 2-5-5 Keihanhondori, Moriguchi City, Osaka Prefecture Inside Sanyo Electric Co., Ltd. (72) Yoshihiro Nakamura 2-5-2 Keihanhondori, Moriguchi City, Osaka Prefecture No. 5 Sanyo Electric Co., Ltd. (72) Ryota Hirata, Inventor 2-5-5 Keihanhondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Junji Matsue 2, Keihanhondori 2, Moriguchi City, Osaka 5-5-5 Sanyo Electric Co., Ltd. (72) Inventor Koji Nagae 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3L060 AA02 CC04 DD01
Claims (3)
ニットとを同一系統の冷媒配管で接続した空気調和装置
において、 運転中の一方の室外ユニットと停止中の他方の室外ユニ
ットとが存在し、運転中の一方の室外ユニットに冷媒不
足が発生した場合、停止中の他方の室外ユニットを運転
させて、この他方の室外ユニットに寝込んだ冷媒を一方
の室外ユニットに回収する冷媒回収制御手段を備えたこ
とを特徴とする空気調和装置。1. An air conditioner in which a plurality of outdoor units and a plurality of indoor units are connected by a refrigerant pipe of the same system, wherein one outdoor unit during operation and the other outdoor unit while stopped exist. When a shortage of refrigerant occurs in one of the outdoor units during operation, the refrigerant recovery control means for operating the other stopped outdoor unit and collecting the refrigerant laid down in the other outdoor unit in one of the outdoor units is provided. An air conditioner, comprising:
ニットとを同一系統の冷媒配管で接続した空気調和装置
において、 運転中の一方の室外ユニットと停止中の他方の室外ユニ
ットとが存在し、運転中の一方の室外ユニットに冷媒不
足が発生した場合、停止中の他方の室外ユニットを運転
させ、運転中の一方の室外ユニットを停止させて、前記
他方の室外ユニットに寝込んだ冷媒を一方の室外ユニッ
トに回収する冷媒回収制御手段を備えたことを特徴とす
る空気調和装置。2. An air conditioner in which a plurality of outdoor units and a plurality of indoor units are connected by a refrigerant pipe of the same system, wherein one outdoor unit during operation and another outdoor unit while stopped exist. If a shortage of refrigerant occurs in one of the outdoor units being operated, the other outdoor unit being stopped is operated, the one outdoor unit being operated is stopped, and the refrigerant laid down in the other outdoor unit is discharged to the other outdoor unit. An air conditioner comprising a refrigerant recovery control means for recovering the refrigerant in an outdoor unit.
ニットとを同一系統の冷媒配管で接続した空気調和装置
において、 運転中の一方の室外ユニットと停止中の他方の室外ユニ
ットとが存在し、運転中の一方の室外ユニットに冷媒不
足が発生した場合、停止中の他方の室外ユニットを運転
させ、運転中の一方の室外ユニットと所定時間並列運転
させて、前記他方の室外ユニットに寝込んだ冷媒を一方
の室外ユニットに回収する冷媒回収制御手段を備えたこ
とを特徴とする空気調和装置。3. An air conditioner in which a plurality of outdoor units and a plurality of indoor units are connected by the same system refrigerant pipe, wherein one outdoor unit in operation and the other outdoor unit in stop exist. When the shortage of refrigerant occurs in one of the outdoor units being operated, the other outdoor unit being stopped is operated, the one outdoor unit being operated is operated in parallel for a predetermined time, and the other outdoor unit is laid down. An air conditioner comprising a refrigerant recovery control means for recovering a refrigerant to one outdoor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31082899A JP3710972B2 (en) | 1999-11-01 | 1999-11-01 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31082899A JP3710972B2 (en) | 1999-11-01 | 1999-11-01 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001133014A true JP2001133014A (en) | 2001-05-18 |
| JP3710972B2 JP3710972B2 (en) | 2005-10-26 |
Family
ID=18009903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31082899A Expired - Fee Related JP3710972B2 (en) | 1999-11-01 | 1999-11-01 | Air conditioner |
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| Country | Link |
|---|---|
| JP (1) | JP3710972B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005308319A (en) * | 2004-04-22 | 2005-11-04 | Matsushita Electric Ind Co Ltd | Air conditioner with pump-down function |
| JP2006125665A (en) * | 2004-10-26 | 2006-05-18 | Sanyo Electric Co Ltd | Air conditioning device |
| JP2006220342A (en) * | 2005-02-09 | 2006-08-24 | Samsung Electronics Co Ltd | Air conditioner |
| CN103791588A (en) * | 2014-01-21 | 2014-05-14 | 宁波奥克斯电气有限公司 | Control method for solving problem of shortage of refrigerants of multi-link air conditioning unit |
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|---|---|---|---|---|
| JPH05240521A (en) * | 1992-02-28 | 1993-09-17 | Sanyo Electric Co Ltd | Recovering device or refrigerant of air conditioning apparatus |
| JPH07234038A (en) * | 1994-02-18 | 1995-09-05 | Sanyo Electric Co Ltd | Multiroom type cooling-heating equipment and operating method thereof |
| JPH08178447A (en) * | 1994-12-19 | 1996-07-12 | Toshiba Ave Corp | Multi-room split type air conditioner |
-
1999
- 1999-11-01 JP JP31082899A patent/JP3710972B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05240521A (en) * | 1992-02-28 | 1993-09-17 | Sanyo Electric Co Ltd | Recovering device or refrigerant of air conditioning apparatus |
| JPH07234038A (en) * | 1994-02-18 | 1995-09-05 | Sanyo Electric Co Ltd | Multiroom type cooling-heating equipment and operating method thereof |
| JPH08178447A (en) * | 1994-12-19 | 1996-07-12 | Toshiba Ave Corp | Multi-room split type air conditioner |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005308319A (en) * | 2004-04-22 | 2005-11-04 | Matsushita Electric Ind Co Ltd | Air conditioner with pump-down function |
| JP2006125665A (en) * | 2004-10-26 | 2006-05-18 | Sanyo Electric Co Ltd | Air conditioning device |
| JP4675083B2 (en) * | 2004-10-26 | 2011-04-20 | 三洋電機株式会社 | Air conditioner |
| JP2006220342A (en) * | 2005-02-09 | 2006-08-24 | Samsung Electronics Co Ltd | Air conditioner |
| JP4575184B2 (en) * | 2005-02-09 | 2010-11-04 | 三星電子株式会社 | Air conditioner |
| CN103791588A (en) * | 2014-01-21 | 2014-05-14 | 宁波奥克斯电气有限公司 | Control method for solving problem of shortage of refrigerants of multi-link air conditioning unit |
| CN103791588B (en) * | 2014-01-21 | 2016-08-24 | 宁波奥克斯电气股份有限公司 | Solve the control method that VRF Air Conditioning System cold-producing medium is on the low side |
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| Publication number | Publication date |
|---|---|
| JP3710972B2 (en) | 2005-10-26 |
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