JP2002174469A - Multichamber air conditioner - Google Patents
Multichamber air conditionerInfo
- Publication number
- JP2002174469A JP2002174469A JP2000371005A JP2000371005A JP2002174469A JP 2002174469 A JP2002174469 A JP 2002174469A JP 2000371005 A JP2000371005 A JP 2000371005A JP 2000371005 A JP2000371005 A JP 2000371005A JP 2002174469 A JP2002174469 A JP 2002174469A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- indoor
- pipe
- indoor unit
- expansion valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一台の室外ユニッ
トに対し複数の室内ユニットを備えた多室形空気調和機
に係わり、より詳細には、室内ユニットに掛かる負荷に
応じ、冷媒回路に流れる冷媒量を最適に調整できるとと
もに、他方の室内ユニットが暖房運転を行なっていたと
しても、特定された一方の室内ユニットが冷房運転を行
えるようにした構成に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-room air conditioner having a plurality of indoor units for one outdoor unit, and more particularly, to a refrigerant circuit in accordance with a load applied to an indoor unit. The present invention relates to a configuration in which the amount of refrigerant flowing can be adjusted optimally and one specified indoor unit can perform a cooling operation even if the other indoor unit performs a heating operation.
【０００２】[0002]
【従来の技術】従来の多室形空気調和機は、例えば、図
４で示すように冷媒回路を構成している。図４で示す多
室形空気調和機３０は、室外ユニット３１に対し、第一
室内ユニット３と第二室内ユニット４とを接続してい
る。前記第一室内ユニット３には第一室内熱交換器３ａ
が、前記第二室内ユニット４には第二室内熱交換器４ａ
が設けられ、前記室外ユニット３１には、圧縮機５と、
四方弁７と、室外熱交換器８が設けられるとともに、前
記第一室内ユニット３と前記第二室内ユニット４とに接
続される配管には膨張弁２０と膨張弁２１とが備えられ
ている。2. Description of the Related Art A conventional multi-chamber air conditioner forms a refrigerant circuit as shown in FIG. 4, for example. In the multi-room air conditioner 30 shown in FIG. 4, the first indoor unit 3 and the second indoor unit 4 are connected to the outdoor unit 31. The first indoor unit 3 includes a first indoor heat exchanger 3a.
However, the second indoor unit 4 includes a second indoor heat exchanger 4a.
The outdoor unit 31 includes a compressor 5 and
A four-way valve 7 and an outdoor heat exchanger 8 are provided, and a pipe connected to the first indoor unit 3 and the second indoor unit 4 is provided with an expansion valve 20 and an expansion valve 21.
【０００３】前記第一室内ユニット３と前記第二室内ユ
ニット４とが共に冷房運転を行う際の冷媒の流れについ
て説明をする。共に冷房運転を行う際は、前記室外ユニ
ット３１の前記圧縮機５から吐出された高温高圧の冷媒
は前記四方弁７を介して前記室外熱交換器８に流入し、
同室外熱交換器８で熱を放出して凝縮する。凝縮した冷
媒はディストリビュータにより分岐し前記膨張弁２０及
び前記膨張弁２１により絞られて低温低圧となり、前記
第一室内機ユニット３の前記第一室内熱交換器３ａに流
入するとともに、前記第二室内ユニット４の前記第二室
内熱交換器４ａに流入し蒸発して熱を吸収するとともに
気化する。気化した冷媒は前記四方弁７を介して前記圧
縮機５に還流し、同圧縮機５で圧縮されて再び高温高圧
となる。The flow of the refrigerant when the first indoor unit 3 and the second indoor unit 4 perform the cooling operation will be described. When performing the cooling operation together, the high-temperature and high-pressure refrigerant discharged from the compressor 5 of the outdoor unit 31 flows into the outdoor heat exchanger 8 through the four-way valve 7,
In the same outdoor heat exchanger 8, heat is released and condensed. The condensed refrigerant is branched by the distributor, throttled by the expansion valve 20 and the expansion valve 21 to have a low temperature and a low pressure, and flows into the first indoor heat exchanger 3a of the first indoor unit 3, and the second indoor It flows into the second indoor heat exchanger 4a of the unit 4 and evaporates to absorb heat and vaporize. The vaporized refrigerant is returned to the compressor 5 via the four-way valve 7 and is compressed by the compressor 5 to become high temperature and high pressure again.
【０００４】次に、前記第一室内ユニット３と前記第二
室内ユニット４とが共に暖房運転を行う際の冷媒の流れ
について説明をする。共に暖房運転を行う際は、前記圧
縮機７から吐出された冷媒は前記四方弁７を介して前記
第一室内ユニット３の前記第一室内熱交換器３ａに流入
するとともに、前記第二室内ユニット４の前記第二室内
熱交換器４ａに流入し、熱を放出して凝縮する。凝縮し
た冷媒は前記膨張弁２０及び前記膨張弁２１を通り、合
流して前記室外熱交換器８に流入し、同室外熱交換器８
で蒸発して熱を吸収し、前記四方弁７を介して前記圧縮
機５に還流する。Next, the flow of the refrigerant when the first indoor unit 3 and the second indoor unit 4 perform the heating operation will be described. When performing the heating operation together, the refrigerant discharged from the compressor 7 flows into the first indoor heat exchanger 3a of the first indoor unit 3 through the four-way valve 7 and the second indoor unit 4, and flows into the second indoor heat exchanger 4a to release heat and condense. The condensed refrigerant passes through the expansion valve 20 and the expansion valve 21 and joins and flows into the outdoor heat exchanger 8.
And evaporates to absorb heat, and is returned to the compressor 5 through the four-way valve 7.
【０００５】しかしながら、上記構成の冷媒回路では、
前記第一室内ユニット３と前記第二第二室内ユニット４
とが共に冷房運転あるいは暖房運転を行った際、その負
荷に応じ、前記膨張弁２０及び前記膨張弁２１の調節に
より冷媒回路に流れる冷媒量を最適に調整することには
困難な点があるとともに、前記第一室内ユニット３が冷
房運転となり、前記第二室内ユニット４が暖房運転とな
る混合運転を行うことができない。近年、パソコン等が
設置された部屋では冬場においても冷房運転が必要とさ
れる場合があり、例えば前記第一室内ユニット３がその
ような部屋に設置された際、前記第二室内ユニット４が
暖房運転を行っていても、前記第一室内ユニット３は冷
房運転を行うとともに、これら室内ユニットの負荷に応
じ、冷媒回路に最適の冷媒量を供給できる多室形空気調
和機が望まれていた。However, in the refrigerant circuit having the above structure,
The first indoor unit 3 and the second second indoor unit 4
When both the cooling operation and the heating operation are performed, it is difficult to optimally adjust the amount of refrigerant flowing in the refrigerant circuit by adjusting the expansion valve 20 and the expansion valve 21 according to the load. In addition, the first indoor unit 3 performs the cooling operation, and the second indoor unit 4 cannot perform the mixing operation in which the heating operation is performed. In recent years, in a room where a personal computer or the like is installed, cooling operation may be required even in the winter season. For example, when the first indoor unit 3 is installed in such a room, the second indoor unit 4 is heated. There is a need for a multi-room air conditioner that can perform the cooling operation of the first indoor unit 3 and supply the optimum amount of refrigerant to the refrigerant circuit according to the load of these indoor units even during operation.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記問題点に
鑑み、二つの室内ユニットを備えた多室形空気調和機に
おいて、室内ユニットに掛かる負荷に応じ、冷媒回路に
流れる冷媒量を最適に調整できるとともに、他方が暖房
運転を行っていても特定された一方の室内ユニットが冷
房運転を行うことのできる多室形空気調和機を提供する
ことを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in a multi-room air conditioner having two indoor units, the amount of refrigerant flowing through a refrigerant circuit is optimized according to the load applied to the indoor units. It is an object of the present invention to provide a multi-room air conditioner that can be adjusted and that allows one specified indoor unit to perform a cooling operation even when the other is performing a heating operation.
【０００７】[0007]
【課題を解決するための手段】本発明は上記課題を解決
するため、圧縮機と、四方弁と、室外熱交換器とを備え
た室外ユニットに対し、第一室内熱交換器を備えた第一
室内ユニットと、第二室内熱交換器を備えた第二室内ユ
ニットとを設け、前記圧縮機の吐出側と吸込側とを前記
四方弁に接続し、同四方弁に前記室外熱交換器の一側を
接続し、同室外熱交換器の他側に接続された配管を分岐
し、夫々膨張弁を介して前記第一室内熱交換器と、前記
第二室内熱交換器との一側に配管により接続するととも
に、これら第一及び第二室内熱交換器の他側に接続され
た配管を合流し、前記四方弁に接続して冷媒回路を構成
し、前記第一室内ユニットと前記第二室内ユニットと
を、共に冷房運転あるいは暖房運転を行えるようにした
多室形空気調和機において、前記室外熱交換器の他側に
接続された配管に膨張弁を設けるとともに、前記第一室
内熱交換器の他側に接続される配管と、前記室外熱交換
器の他側から分岐し前記第二室内熱交換器の一側に接続
される配管との間に、膨張弁を備えたバイパス管を設
け、前記第一室内熱交換器の他側に接続される配管の前
記バイパス管の接続部と、前記合流部との間に電磁開閉
弁を設け、前記第一及び第二室内ユニットの冷暖房運転
により掛かる負荷に応じ、前記室外熱交換器の他側に接
続された前記膨張弁で冷媒量を調整し、前記冷媒回路に
最適な冷媒量を供給する一方、前記四方弁を暖房運転に
切換えた際、前記バイパス管に備えられた膨張弁を絞り
状態にし、前記電磁開閉弁を閉じることにより、前記第
二室内ユニットが暖房運転を行いながら、前記第一室内
ユニットが冷房運転を行えるようにした構成となってい
る。According to the present invention, there is provided an outdoor unit having a compressor, a four-way valve, and an outdoor heat exchanger. One indoor unit and a second indoor unit provided with a second indoor heat exchanger are provided, and a discharge side and a suction side of the compressor are connected to the four-way valve, and the four-way valve is provided with the outdoor heat exchanger. One side is connected, the pipe connected to the other side of the same outdoor heat exchanger is branched, and the first indoor heat exchanger and the second indoor heat exchanger are respectively connected to one side via an expansion valve. Connected by pipes, the pipes connected to the other side of the first and second indoor heat exchangers are joined, connected to the four-way valve to form a refrigerant circuit, and the first indoor unit and the second An indoor unit and a multi-room air conditioner that can perform both cooling operation and heating operation An expansion valve is provided in a pipe connected to the other side of the outdoor heat exchanger, and a pipe connected to the other side of the first indoor heat exchanger is branched from the other side of the outdoor heat exchanger. A bypass pipe provided with an expansion valve is provided between a pipe connected to one side of the second indoor heat exchanger and a bypass pipe of a pipe connected to the other side of the first indoor heat exchanger. An electromagnetic on-off valve is provided between the connection portion and the junction, and the expansion valve connected to the other side of the outdoor heat exchanger according to a load applied by the cooling and heating operation of the first and second indoor units. While adjusting the refrigerant amount and supplying the optimal refrigerant amount to the refrigerant circuit, when the four-way valve is switched to the heating operation, the expansion valve provided in the bypass pipe is set to the throttle state, and the electromagnetic on-off valve is closed. Thereby, while the second indoor unit performs the heating operation It said first indoor unit has a configuration in which so as to perform a cooling operation.
【０００８】また、前記バイパス管と、同バイパス管に
備えられる膨張弁と、前記電磁開閉弁とは、前記室外ユ
ニット内に設けられてなる構成となっている。[0008] Further, the bypass pipe, the expansion valve provided in the bypass pipe, and the electromagnetic on-off valve are provided in the outdoor unit.
【０００９】また、前記第一室内ユニットを運転し、前
記第二室内ユニットを停止させる際、前記第二室内熱交
換器の一側に接続された前記膨張弁を微小開状態とし
て、冷媒の前記第二室内熱交換器内での滞留を防止して
なる構成となっている。[0009] When the first indoor unit is operated and the second indoor unit is stopped, the expansion valve connected to one side of the second indoor heat exchanger is set to a slightly open state, and the refrigerant is cooled. It is configured to prevent stagnation in the second indoor heat exchanger.
【００１０】更に、前記第二室内ユニットを運転し、前
記第一室内ユニットを停止させる際、前記第一室内熱交
換器の一側に接続された前記膨張弁を微小開状態とし
て、冷媒の前記第一室内熱交換器内での滞留を防止して
なる構成となっている。[0010] Further, when the second indoor unit is operated and the first indoor unit is stopped, the expansion valve connected to one side of the first indoor heat exchanger is set to a slightly open state, and the refrigerant is cooled. It is configured to prevent stagnation in the first indoor heat exchanger.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態を、添
付図面に基づいた実施例として詳細に説明する。図１は
本発明による多室形空気調和機の冷媒回路図であり、図
２（Ａ）は室内ユニットが共に冷房運転を行う際の冷媒
の流れを示す流れ図であり、図２（Ｂ）は室内ユニット
が共に暖房運転を行う際の冷媒の流れを示す流れ図であ
る。図３は室内ユニットの一方が冷房運転を行い、他方
が暖房運転を行う際の冷媒の流れを示す流れ図である。
本発明による多室形空気調和機１は、図１で示すよう
に、一台の室外ユニット２に対し、第一室内熱交換器３
ａを備えた第一室内ユニット３と、第二室内熱交換器４
ａを備えた第二室内ユニット４とを接続しており、これ
ら室内ユニットが共に冷房運転あるいは暖房運転が行え
る一方、前記第二室内ユニット４が暖房運転を行ってい
る際、例えばパソコンルーム等に設置された前記第一室
内ユニット３が冷房運転を行えるようになっている。Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a refrigerant circuit diagram of a multi-room air conditioner according to the present invention, FIG. 2 (A) is a flow chart showing a flow of a refrigerant when both indoor units perform a cooling operation, and FIG. It is a flowchart which shows the flow of the refrigerant | coolant when both indoor units perform a heating operation. FIG. 3 is a flowchart showing the flow of the refrigerant when one of the indoor units performs the cooling operation and the other performs the heating operation.
As shown in FIG. 1, a multi-room air conditioner 1 according to the present invention includes a first indoor heat exchanger 3 for one outdoor unit 2.
a and the second indoor heat exchanger 4
is connected to the second indoor unit 4 provided with a, and both of these indoor units can perform the cooling operation or the heating operation, while the second indoor unit 4 performs the heating operation, for example, in a personal computer room or the like. The installed first indoor unit 3 can perform a cooling operation.
【００１２】次に、前記冷媒回路の構成について説明を
する。前記室外ユニット２には、圧縮機５と、同圧縮機
５の吸込側に接続されたアキュームレータ６と、四方弁
７と、室外熱交換器８とが設けられている。前記圧縮機
５の吐出側は第一配管９により、吸込側は第九配管１８
により前記四方弁７に接続されており、同四方弁７は第
二配管１０により前記室外熱交換器８の一側に接続され
ている。同室外熱交換器８の他側は膨張弁１２を備えた
第三配管１１に接続され、同第三配管１１は、第四配管
１３と第五配管１４とに分岐し、分岐した一方の前記第
四配管１３は膨張弁２０を介して前記第一室内熱交換器
３ａの一側に接続され、分岐した他方の前記第五配管１
４は膨張弁２１を介して前記第二室内熱交換器４ａの一
側に接続されている。前記第一室内熱交換器３ａの他側
は第六配管１５に接続され、前記第二室内熱交換器４ａ
の他側は第七配管１６に接続されており、前記第六配管
１５と前記第七配管１６は合流して第八配管１７とな
り、前記四方弁７に接続されている。また、前記第一室
内熱交換器３ａの他側に接続された前記第六配管１５
と、前記第三配管１１から分岐し前記第二室内熱交換器
４ａの一側に接続された前記第五配管１４との間には、
膨張弁２２を設けたバイパス管１９が接続されており、
また、前記第六配管１５の前記バイパス管１９の接続部
と前記第八配管１７との接続部との間には、電磁開閉弁
２３が設けられている。Next, the configuration of the refrigerant circuit will be described. The outdoor unit 2 includes a compressor 5, an accumulator 6 connected to the suction side of the compressor 5, a four-way valve 7, and an outdoor heat exchanger 8. The discharge side of the compressor 5 is provided by a first pipe 9 and the suction side is provided by a ninth pipe 18.
Is connected to the four-way valve 7, and the four-way valve 7 is connected to one side of the outdoor heat exchanger 8 by a second pipe 10. The other side of the outdoor heat exchanger 8 is connected to a third pipe 11 provided with an expansion valve 12, and the third pipe 11 branches into a fourth pipe 13 and a fifth pipe 14, and one of the branched pipes The fourth pipe 13 is connected to one side of the first indoor heat exchanger 3a via an expansion valve 20, and the other branched fifth pipe 1
Reference numeral 4 is connected to one side of the second indoor heat exchanger 4a via an expansion valve 21. The other side of the first indoor heat exchanger 3a is connected to a sixth pipe 15, and the second indoor heat exchanger 4a
The other side is connected to a seventh pipe 16, and the sixth pipe 15 and the seventh pipe 16 merge to form an eighth pipe 17, which is connected to the four-way valve 7. Further, the sixth pipe 15 connected to the other side of the first indoor heat exchanger 3a
And the fifth pipe 14 branched from the third pipe 11 and connected to one side of the second indoor heat exchanger 4a.
The bypass pipe 19 provided with the expansion valve 22 is connected,
In addition, an electromagnetic on-off valve 23 is provided between the connection part of the sixth pipe 15 to the bypass pipe 19 and the connection part to the eighth pipe 17.
【００１３】次に、前記第一室内ユニット３と前記第二
室内ユニット４とが、共に冷房運転を行う際の冷媒の流
れについて説明をする。共に冷房運転を行う際は、前記
バイパス管１９に設けられた前記膨張弁２２が閉じら
れ、前記電磁開閉弁２３は開状態となる。また前記膨張
弁２０と前記膨張弁２１とは絞り状態となる。前記圧縮
機５の吐出側から吐出された冷媒は、図２（Ａ）で示す
ように、前記四方弁７を介して前記室外熱交換器８に流
入し、同室外熱交換器８で凝縮して熱を放出する。熱を
放出し凝縮した冷媒は前記第三配管１１を通り、前記第
四配管１３と前記第五配管１４とに分岐し、前記膨張弁
２０及び前記膨張弁２１により絞られ低温低圧となって
前記第一室内熱交換器３ａと前記第二室内熱交換器４ａ
とに流入する。これら室内熱交換器３ａ及び４ａに流入
した冷媒は蒸発して熱を吸収し、熱を吸収した冷媒は前
記第六配管１５と前記第七配管１６とを通り前記第八配
管１７で合流して、前記四方弁７を介し前記圧縮機５の
吸込側に還流する。また、前記室内ユニット３及び４の
冷房運転の負荷に応じ、前記膨張弁１２の開閉度が調節
され、前記室外熱交換器８から前記第四配管１３と前記
第五配管１４とに流れる冷媒量を調整し、前記室内ユニ
ット３及び４が効率の良い冷房運転を行えるようになっ
ている。Next, the flow of the refrigerant when both the first indoor unit 3 and the second indoor unit 4 perform the cooling operation will be described. When performing the cooling operation, the expansion valve 22 provided in the bypass pipe 19 is closed, and the electromagnetic on-off valve 23 is opened. The expansion valve 20 and the expansion valve 21 are in a throttled state. The refrigerant discharged from the discharge side of the compressor 5 flows into the outdoor heat exchanger 8 through the four-way valve 7 and is condensed in the outdoor heat exchanger 8 as shown in FIG. Release heat. The refrigerant that has released and condensed heat passes through the third pipe 11, branches into the fourth pipe 13 and the fifth pipe 14, is throttled by the expansion valves 20 and 21, and has a low temperature and low pressure. First indoor heat exchanger 3a and second indoor heat exchanger 4a
And flows into. The refrigerant flowing into these indoor heat exchangers 3a and 4a evaporates and absorbs heat, and the refrigerant that has absorbed heat passes through the sixth pipe 15 and the seventh pipe 16 and joins at the eighth pipe 17. The refrigerant is returned to the suction side of the compressor 5 through the four-way valve 7. The degree of opening and closing of the expansion valve 12 is adjusted according to the load of the cooling operation of the indoor units 3 and 4, and the amount of refrigerant flowing from the outdoor heat exchanger 8 to the fourth pipe 13 and the fifth pipe 14. So that the indoor units 3 and 4 can perform an efficient cooling operation.
【００１４】次に、前記第一室内ユニット３と前記第二
室内ユニット４とが、共に暖房運転を行う際の冷媒の流
れについて説明をする。共に暖房運転を行う際は、上記
した冷房運転と同様に、前記バイパス管１９に設けられ
た前記膨張弁２２が閉じられ、前記電磁開閉弁２３は開
状態となる。また前記膨張弁２０と前記膨張弁２１とは
絞り状態となる。前記圧縮機５の吐出側から吐出された
冷媒は、図２（Ｂ）で示すように、前記四方弁７を介し
て前記第八配管１７に流入し、同第八配管１７から前記
第六配管１５と前記第七配管１６に分岐する。分岐した
一方の冷媒は前記第六配管１５に備えられた開状態の前
記電磁開閉弁２３を介して前記第一室内熱交換器３ａに
流入し、分岐した他方は前記第七配管１６を通り、前記
第二室内熱交換器４ａに流入する。これら室内熱交換器
に流入した冷媒は凝縮して熱を放出し、熱を放出した冷
媒は夫々前記第四配管１３と前記第五配管１４を通り、
前記第三配管１１に合流し、同第三配管１１から前記室
外熱交換器８に流入する。同室外熱交換器８に流入した
冷媒は蒸発して熱を吸収し、その後前記四方弁７を介し
て前記圧縮機５の吸込側に還流する。また、前記室内ユ
ニット３及び４の暖房運転の負荷に応じ、前記第三配管
１１に備えられた前記膨張弁１２の開閉度が調節され、
前記室外熱交換器８に流入する冷媒量を調整し、前記室
内ユニット３及び４が効率の良い暖房運転を行えるよう
になっている。Next, the flow of the refrigerant when both the first indoor unit 3 and the second indoor unit 4 perform the heating operation will be described. When the heating operation is performed together, the expansion valve 22 provided in the bypass pipe 19 is closed and the electromagnetic on-off valve 23 is opened as in the cooling operation described above. The expansion valve 20 and the expansion valve 21 are in a throttled state. The refrigerant discharged from the discharge side of the compressor 5 flows into the eighth pipe 17 through the four-way valve 7 as shown in FIG. 15 and the seventh pipe 16. One of the branched refrigerants flows into the first indoor heat exchanger 3a via the electromagnetic on-off valve 23 provided in the sixth pipe 15 in an open state, and the other branches through the seventh pipe 16, It flows into the second indoor heat exchanger 4a. The refrigerant flowing into these indoor heat exchangers is condensed and releases heat, and the refrigerant that has released heat passes through the fourth pipe 13 and the fifth pipe 14, respectively.
It joins the third pipe 11 and flows into the outdoor heat exchanger 8 from the third pipe 11. The refrigerant flowing into the outdoor heat exchanger 8 evaporates and absorbs heat, and then returns to the suction side of the compressor 5 via the four-way valve 7. Further, the degree of opening and closing of the expansion valve 12 provided in the third pipe 11 is adjusted according to the load of the heating operation of the indoor units 3 and 4,
The amount of the refrigerant flowing into the outdoor heat exchanger 8 is adjusted so that the indoor units 3 and 4 can perform an efficient heating operation.
【００１５】次に、前記第一室内ユニット３が冷房運転
を行い、前記第二室内ユニット４が暖房運転を行う冷暖
房混合運転の際の冷媒の流れについて説明をする。冷暖
房混合運転の際は、前記第六配管１５に備えられた前記
電磁開閉弁２３と、前記第五配管１４に備えられた前記
膨張弁２１とは閉じられ、前記第四配管１３に備えられ
た前記膨張弁２０は開けられる。また前記バイパス管１
９に設けられた前記膨張弁２２は絞り状態に設定され
る。前記圧縮機５の吐出側から吐出された冷媒は、前記
四方弁７を介して前記第八配管１７に流入し、前記電磁
開閉弁２３が閉じられていることにより前記第七配管１
６に流入する。冷媒は前記第七配管１６を通り、前記第
二室内熱交換器４ａに流入し、同第二室内熱交換器４ａ
で凝縮して熱を放出し、熱を放出した冷媒は、前記膨張
弁２１が閉じられていることにより、前記バイパス管１
９に流入する。同バイパス管１９に設けられた前記膨張
弁２２により冷媒は絞られ、低温低圧となって前記第一
室内熱交換器３ａに流入し、同第一室内熱交換器３ａで
蒸発して熱を吸収し、熱を吸収した冷媒は前記第四配管
１３と前記第三配管１１と前記室外熱交換器８とを通
り、前記四方弁７を介して前記圧縮機５の吸込側に還流
する。この冷暖房混合運転の際も、前記室内ユニット３
の冷房運転及び前記室内ユニット４の暖房運転の負荷に
応じ、前記第三配管１１に備えられた前記膨張弁１２の
開閉度が調節され、前記室外熱交換器８に流入する冷媒
量を調整し、前記室内ユニット３及び４が効率の良い運
転を行えるようになっている。Next, the flow of the refrigerant during the cooling / heating mixing operation in which the first indoor unit 3 performs the cooling operation and the second indoor unit 4 performs the heating operation will be described. At the time of the cooling / heating mixing operation, the electromagnetic on-off valve 23 provided in the sixth pipe 15 and the expansion valve 21 provided in the fifth pipe 14 were closed and provided in the fourth pipe 13. The expansion valve 20 is opened. The bypass pipe 1
The expansion valve 22 provided at 9 is set in a throttled state. The refrigerant discharged from the discharge side of the compressor 5 flows into the eighth pipe 17 via the four-way valve 7, and the seventh pipe 1 is closed by closing the electromagnetic on-off valve 23.
Flow into 6. The refrigerant passes through the seventh pipe 16 and flows into the second indoor heat exchanger 4a.
The refrigerant that has condensed and released the heat and released the heat, the expansion pipe 21 is closed and the bypass pipe 1
Flow into 9 The refrigerant is throttled by the expansion valve 22 provided in the bypass pipe 19, flows into the first indoor heat exchanger 3a at low temperature and low pressure, and is evaporated by the first indoor heat exchanger 3a to absorb heat. Then, the refrigerant having absorbed heat passes through the fourth pipe 13, the third pipe 11, and the outdoor heat exchanger 8, and returns to the suction side of the compressor 5 through the four-way valve 7. During the cooling / heating mixed operation, the indoor unit 3
The degree of opening and closing of the expansion valve 12 provided in the third pipe 11 is adjusted according to the load of the cooling operation and the heating operation of the indoor unit 4 to adjust the amount of refrigerant flowing into the outdoor heat exchanger 8. The indoor units 3 and 4 can operate efficiently.
【００１６】更に、前記第一室内ユニット３を冷房ある
いは暖房運転し、前記第二室内ユニット４を停止させる
際、前記第二室内熱交換器４ａの一側に接続された前記
膨張弁２１を微小開状態として、冷媒の前記第二室内熱
交換器４ａ内での滞留を防止するとともに、前記第二室
内ユニット４を冷房あるいは暖房運転し、前記第一室内
ユニット３を停止させる際、前記第一室内熱交換器３ａ
の一側に接続された前記膨張弁２０を微小開状態とし
て、冷媒の前記第一室内熱交換器３ａ内での滞留を防止
するようになっている。Further, when the first indoor unit 3 is operated for cooling or heating and the second indoor unit 4 is stopped, the expansion valve 21 connected to one side of the second indoor heat exchanger 4a is minutely moved. In the open state, while preventing the refrigerant from staying in the second indoor heat exchanger 4a, cooling or heating the second indoor unit 4 to stop the first indoor unit 3, the first indoor unit 3 Indoor heat exchanger 3a
The expansion valve 20 connected to one side is set to a minute open state to prevent the refrigerant from staying in the first indoor heat exchanger 3a.
【００１７】上記したように、本発明による多室形空気
調和機１においては、前記第一室内ユニット３と前記第
二室内ユニット４の冷暖房運転の負荷に応じ、前記第三
配管１１に備えられた前記膨張弁１２により、冷媒回路
を流れる冷媒量を調整して前記室内ユニット３及び４が
効率の良い運転を行えるとともに、前記第二室内ユニッ
ト４が暖房運転を行なっていても、前記第一室内ユニッ
ト３が冷房運転を行うことができる多室形空気調和機と
なる。As described above, in the multi-room air conditioner 1 according to the present invention, the multi-room air conditioner 1 is provided in the third pipe 11 according to the load of the cooling / heating operation of the first indoor unit 3 and the second indoor unit 4. The expansion valve 12 adjusts the amount of refrigerant flowing through the refrigerant circuit so that the indoor units 3 and 4 can operate efficiently, and even if the second indoor unit 4 performs heating operation, The indoor unit 3 is a multi-room air conditioner capable of performing a cooling operation.
【００１８】[0018]
【発明の効果】以上説明したように、本発明によると、
室内ユニットが共に冷房運転あるいは暖房運転が行える
多室形空気調和機の室外熱交換器の一側に膨張弁を接続
するとともに、膨張弁を備えたバイパス管を設け、室内
ユニットと室外ユニットとを接続する配管に電磁開閉弁
を設けることにより、夫々の室内ユニットに掛かる負荷
に応じて冷媒回路を流れる冷媒量を最適に調整できると
ともに、特定された一方の室内ユニットが冷房運転を行
う一方、他方が暖房運転を行うことができ、特定された
一方の室内ユニットが例えばパソコンルーム等に設置さ
れた際、冬場においても、冷房運転を行うことのできる
使い勝手の良い多室形空気調和機となる。As described above, according to the present invention,
An expansion valve is connected to one side of an outdoor heat exchanger of a multi-room air conditioner in which both indoor units can perform a cooling operation or a heating operation, and a bypass pipe provided with an expansion valve is provided. By providing an electromagnetic open / close valve on the connecting pipe, the amount of refrigerant flowing through the refrigerant circuit can be optimally adjusted according to the load applied to each indoor unit, and one specified indoor unit performs cooling operation, while the other indoor unit performs cooling operation. Can perform a heating operation, and when one of the specified indoor units is installed in, for example, a personal computer room or the like, a user-friendly multi-room air conditioner that can perform a cooling operation even in winter.
【図１】本発明による多室形空気調和機の冷媒回路図で
ある。FIG. 1 is a refrigerant circuit diagram of a multi-room air conditioner according to the present invention.
【図２】（Ａ）は、本発明による多室形空気調和機の、
室内ユニットが共に冷房運転を行う際の冷媒の流れを示
す流れ図である。（Ｂ）は、本発明による多室形空気調
和機の、室内ユニットが共に暖房運転を行う際の冷媒の
流れを示す流れ図である。FIG. 2 (A) shows a multi-room air conditioner according to the present invention.
It is a flowchart which shows the flow of the refrigerant | coolant when an indoor unit performs a cooling operation together. (B) is a flowchart which shows the flow of the refrigerant when the indoor units of the multi-room air conditioner according to the present invention perform the heating operation together.
【図３】本発明による多室形空気調和機の、一方の特定
された室内ユニットが冷房運転を行い、他方の室内ユニ
ットが暖房運転を行う際の冷媒の流れを示す流れ図であ
る。FIG. 3 is a flowchart showing the flow of refrigerant when one specified indoor unit performs a cooling operation and the other indoor unit performs a heating operation in the multi-room air conditioner according to the present invention.
【図４】従来例による多室形空気調和機の冷媒回路図で
ある。FIG. 4 is a refrigerant circuit diagram of a conventional multi-room air conditioner.
１ 多室形空気調和機 ２ 室外ユニット ３ 室内ユニット ３ａ 室内熱交換器 ４ 室内ユニット ４ａ 室内熱交換器 ５ 圧縮機 ６ アキュームレータ ７ 四方弁 ８ 室外熱交換器 ９ 第一配管 １０ 第二配管 １１ 第三配管 １２ 膨張弁 １３ 第四配管 １４ 第五配管 １５ 第六配管 １６ 第七配管 １７ 第八配管 １８ 第九配管 １９ バイパス配管 ２０ 第一膨張弁 ２１ 第二膨張弁 ２２ 第三膨張弁 ２３ 電磁開閉弁 DESCRIPTION OF SYMBOLS 1 Multi-room air conditioner 2 Outdoor unit 3 Indoor unit 3a Indoor heat exchanger 4 Indoor unit 4a Indoor heat exchanger 5 Compressor 6 Accumulator 7 Four-way valve 8 Outdoor heat exchanger 9 First pipe 10 Second pipe 11 Third Piping 12 Expansion valve 13 Fourth piping 14 Fifth piping 15 Sixth piping 16 Seventh piping 17 Eighth piping 18 Ninth piping 19 Bypass piping 20 First expansion valve 21 Second expansion valve 22 Third expansion valve 23 Electromagnetic on-off valve
Claims (4)
備えた室外ユニットに対し、第一室内熱交換器を備えた
第一室内ユニットと、第二室内熱交換器を備えた第二室
内ユニットとを設け、前記圧縮機の吐出側と吸込側とを
前記四方弁に接続し、同四方弁に前記室外熱交換器の一
側を接続し、同室外熱交換器の他側に接続された配管を
分岐し、夫々膨張弁を介して前記第一室内熱交換器と、
前記第二室内熱交換器との一側に配管により接続すると
ともに、これら第一及び第二室内熱交換器の他側に接続
された配管を合流し、前記四方弁に接続して冷媒回路を
構成し、前記第一室内ユニットと前記第二室内ユニット
とを、共に冷房運転あるいは暖房運転を行えるようにし
た多室形空気調和機において、 前記室外熱交換器の他側に接続された配管に膨張弁を設
けるとともに、前記第一室内熱交換器の他側に接続され
る配管と、前記室外熱交換器の他側から分岐し前記第二
室内熱交換器の一側に接続される配管との間に、膨張弁
を備えたバイパス管を設け、前記第一室内熱交換器の他
側に接続される配管の前記バイパス管の接続部と、前記
合流部との間に電磁開閉弁を設け、 前記第一及び第二室内ユニットの冷暖房運転により掛か
る負荷に応じ、前記室外熱交換器の他側に接続された前
記膨張弁で冷媒量を調整し、前記冷媒回路に最適な冷媒
量を供給する一方、前記四方弁を暖房運転に切換えた
際、前記バイパス管に備えられた膨張弁を絞り状態に
し、前記電磁開閉弁を閉じることにより、前記第二室内
ユニットが暖房運転を行いながら、前記第一室内ユニッ
トが冷房運転を行えるようにしたことを特徴とする多室
形空気調和機。1. An outdoor unit having a compressor, a four-way valve, and an outdoor heat exchanger, a first indoor unit having a first indoor heat exchanger, and a second indoor heat exchanger. A second indoor unit, connecting the discharge side and the suction side of the compressor to the four-way valve, connecting one side of the outdoor heat exchanger to the four-way valve, and the other side of the outdoor heat exchanger Branch pipe connected to the first indoor heat exchanger via an expansion valve, respectively,
A pipe connected to one side of the second indoor heat exchanger and a pipe connected to the other side of the first and second indoor heat exchangers, connected to the four-way valve to form a refrigerant circuit. In the multi-room air conditioner configured and configured to perform the cooling operation or the heating operation together with the first indoor unit and the second indoor unit, a pipe connected to the other side of the outdoor heat exchanger A pipe provided with an expansion valve and connected to the other side of the first indoor heat exchanger, and a pipe branched from the other side of the outdoor heat exchanger and connected to one side of the second indoor heat exchanger. A bypass pipe provided with an expansion valve is provided between the connection part of the bypass pipe of the pipe connected to the other side of the first indoor heat exchanger, and an electromagnetic on-off valve is provided between the junction. , The negative effect caused by the cooling and heating operation of the first and second indoor units According to the, adjusting the refrigerant amount by the expansion valve connected to the other side of the outdoor heat exchanger, while supplying the optimal refrigerant amount to the refrigerant circuit, when switching the four-way valve to heating operation, The first indoor unit can perform a cooling operation while the second indoor unit performs a heating operation by closing an expansion valve provided in a bypass pipe and closing the electromagnetic on-off valve. Multi-room air conditioner.
られる膨張弁と、前記電磁開閉弁とは、前記室外ユニッ
ト内に設けられてなることを特徴とする請求項１に記載
の多室形空気調和機。2. The multi-chamber type according to claim 1, wherein the bypass pipe, an expansion valve provided in the bypass pipe, and the electromagnetic on-off valve are provided in the outdoor unit. Air conditioner.
二室内ユニットを停止させる際、前記第二室内熱交換器
の一側に接続された前記膨張弁を微小開状態として、冷
媒の前記第二室内熱交換器内での滞留を防止してなるこ
とを特徴とする請求項１に記載の多室形空気調和機。3. When the first indoor unit is operated and the second indoor unit is stopped, the expansion valve connected to one side of the second indoor heat exchanger is set to a minute open state, and the refrigerant is cooled. 2. The multi-room air conditioner according to claim 1, wherein stagnation in the second indoor heat exchanger is prevented.
一室内ユニットを停止させる際、前記第一室内熱交換器
の一側に接続された前記膨張弁を微小開状態として、冷
媒の前記第一室内熱交換器内での滞留を防止してなるこ
とを特徴とする請求項１に記載の多室形空気調和機。4. When the second indoor unit is operated and the first indoor unit is stopped, the expansion valve connected to one side of the first indoor heat exchanger is set to a slightly open state, and the refrigerant is cooled. The multi-room air conditioner according to claim 1, wherein stagnation in the first indoor heat exchanger is prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000371005A JP2002174469A (en) | 2000-12-06 | 2000-12-06 | Multichamber air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000371005A JP2002174469A (en) | 2000-12-06 | 2000-12-06 | Multichamber air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002174469A true JP2002174469A (en) | 2002-06-21 |
Family
ID=18840793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000371005A Pending JP2002174469A (en) | 2000-12-06 | 2000-12-06 | Multichamber air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002174469A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101119335B1 (en) | 2005-02-15 | 2012-03-06 | 엘지전자 주식회사 | Multi-air conditioner capable of cooling and heating simultaneously and condensed refrigerant control method thereof |
| KR101119383B1 (en) | 2005-02-15 | 2012-03-06 | 엘지전자 주식회사 | Multi-air conditioner capable of heating and cooling simultaneously |
| KR101172445B1 (en) | 2005-02-15 | 2012-08-07 | 엘지전자 주식회사 | Multi-air conditioner capable of cooling and heating simultaneously |
| KR101497772B1 (en) * | 2012-12-31 | 2015-03-05 | 고려대학교 산학협력단 | Heat Exchanging System |
| WO2022137510A1 (en) * | 2020-12-25 | 2022-06-30 | 三菱電機株式会社 | Refrigeration cycle device |
-
2000
- 2000-12-06 JP JP2000371005A patent/JP2002174469A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101119335B1 (en) | 2005-02-15 | 2012-03-06 | 엘지전자 주식회사 | Multi-air conditioner capable of cooling and heating simultaneously and condensed refrigerant control method thereof |
| KR101119383B1 (en) | 2005-02-15 | 2012-03-06 | 엘지전자 주식회사 | Multi-air conditioner capable of heating and cooling simultaneously |
| KR101172445B1 (en) | 2005-02-15 | 2012-08-07 | 엘지전자 주식회사 | Multi-air conditioner capable of cooling and heating simultaneously |
| KR101497772B1 (en) * | 2012-12-31 | 2015-03-05 | 고려대학교 산학협력단 | Heat Exchanging System |
| WO2022137510A1 (en) * | 2020-12-25 | 2022-06-30 | 三菱電機株式会社 | Refrigeration cycle device |
| GB2615469A (en) * | 2020-12-25 | 2023-08-09 | Mitsubishi Electric Corp | Refrigeration cycle device |
| JP7471460B2 (en) | 2020-12-25 | 2024-04-19 | 三菱電機株式会社 | Refrigeration Cycle Equipment |
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