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.
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JP31082899A JP3710972B2 (en) | 1999-11-01 | 1999-11-01 | Air conditioner |
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JP31082899A JP3710972B2 (en) | 1999-11-01 | 1999-11-01 | Air conditioner |
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JP2001133014A true JP2001133014A (en) | 2001-05-18 |
JP3710972B2 JP3710972B2 (en) | 2005-10-26 |
Family
ID=18009903
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JP31082899A Expired - Fee Related JP3710972B2 (en) | 1999-11-01 | 1999-11-01 | Air conditioner |
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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 |
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1999
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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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JP3710972B2 (en) | 2005-10-26 |
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