JPS5966668A - Refrigeration cycle - Google Patents
Refrigeration cycleInfo
- Publication number
- JPS5966668A JPS5966668A JP17576782A JP17576782A JPS5966668A JP S5966668 A JPS5966668 A JP S5966668A JP 17576782 A JP17576782 A JP 17576782A JP 17576782 A JP17576782 A JP 17576782A JP S5966668 A JPS5966668 A JP S5966668A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- heat exchanger
- indoor heat
- valve
- refrigeration cycle
- 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
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は冷凍サイクルに係り、特に複数の室内側熱交換
器を有するいわゆるマルチ型空気調和機の冷凍サイクル
に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a refrigeration cycle, and particularly to a refrigeration cycle for a so-called multi-type air conditioner having a plurality of indoor heat exchangers.
第１図は従来のマルチ型空気調和機の冷凍サイクルを示
したもので、圧Ｒｉｉ磯１、四方弁２、室外側熱交換器
３の一端を１１１４４次管路４で接続し、室外側熱交換
器３の他端には、逆止弁５および暖房キャピラリチュー
ブ６が接続された１置房管路７と、冷房キャピラリチュ
ーブ８および逆止弁９か接続された冷房管路］Ｏとが並
列に接続されるとともに、第１室内側熱交換器】１およ
び、第２室内側熱交換器１２が、それぞれ上記冷暖房管
路７ 、１０（ｔｉｌｌおよび上記四方弁２４Ｕｌに例
えば電磁弁等の開閉弁１：３ａ 。Figure 1 shows the refrigeration cycle of a conventional multi-type air conditioner, in which one end of a pressure Rii 1, a four-way valve 2, and an outdoor heat exchanger 3 are connected by a 11144th conduit 4, and the outdoor heat At the other end of the exchanger 3, a cooling pipe 7 connected to a check valve 5 and a heating capillary tube 6 and a cooling pipe O connected to a cooling capillary tube 8 and a check valve 9 are connected in parallel. The first indoor heat exchanger [1] and the second indoor heat exchanger 12 are connected to the air conditioning pipes 7, 10 (till) and the four-way valve 24Ul, respectively, and are equipped with an on-off valve such as a solenoid valve. 1:3a.
１３１） 、 １３ｃ 、 １３ｄ を介して、並列に
接続されている。131), 13c, and 13d are connected in parallel.
さらに、第１室内側熱交換器１１と開閉弁１３ａとの間
の管路４ａおよび、第２室内側熱交換器１２と開閉弁１
３ｃとの間の管路４ｂからそれぞれ分岐され、この分岐
された管路１４ａ 、 １４ｂをそれぞれキャピラリチ
ューブ１５ａ 、 １５ｂを介して接続するとともに、
その端部な上記暖房キャピラリチューブ６と逆止弁５と
の間の管路４ｃＫ、逆止弁１６を介して接続してなる冷
媒戻し管１７を有し、四方弁２側の開閉弁１３ｂ 、
１３ｄの前俳をそれぞれ逆止弁、１８ａ 、１８ｂを介
：１１１１１１ ｄｌ
して接続してなる冷房管１９ａ 、 １９ｂが設ゆ５れ
てい □る。： ・′ □上記
冷凍サイクルにおい、て、冷房時には図中実線矢印で示
すように、圧縮機１で圧縮された高温高圧ガス冷媒は四
方弁２を通り、室外側熱交換器３で熱交換を行なって高
温高圧液冷媒となり１．冷唐管路１０を坤り、冷房キャ
ピラリチューブ８で膨張されて低温低圧液冷媒となる。Furthermore, the pipe line 4a between the first indoor heat exchanger 11 and the on-off valve 13a, and the second indoor heat exchanger 12 and the on-off valve 1
3c, and connect the branched pipes 14a and 14b via capillary tubes 15a and 15b, respectively.
It has a pipe line 4cK between the heating capillary tube 6 and the check valve 5 at its end, a refrigerant return pipe 17 connected via the check valve 16, and an on-off valve 13b on the four-way valve 2 side,
Cooling pipes 19a and 19b are provided in which the front pipes 13d are connected via check valves 18a and 18b, respectively. : ・' □ In the above refrigeration cycle, during cooling, the high temperature, high pressure gas refrigerant compressed by the compressor 1 passes through the four-way valve 2 and undergoes heat exchange in the outdoor heat exchanger 3, as shown by the solid line arrow in the figure. 1. It becomes a high temperature, high pressure liquid refrigerant. The refrigerant passes through the cooling pipe 10 and is expanded in the cooling capillary tube 8 to become a low-temperature, low-pressure liquid refrigerant.
そして、この冷媒は分岐され、それぞ、れ第１室内側熱
交換器１１および第２室内側熱交換器１２にお（ミて熱
交換を行ない、低温低圧ガスとなり二逆止弁１８ａ 、
１８ｂおよ赫一方弁２を通り、圧縮機１へ戻る。Then, this refrigerant is branched and is transferred to the first indoor heat exchanger 11 and the second indoor heat exchanger 12 (where heat exchange is performed and the refrigerant becomes a low-temperature, low-pressure gas, which is connected to the two check valves 18a,
18b and the one-way valve 2, and return to the compressor 1.
また、暖房時には図中破線矢印で示すように、冷房時と
は逆に圧縮機１、四方弁２、開閉弁１３ｂ。Also, during heating, as shown by the broken line arrow in the figure, the compressor 1, four-way valve 2, and on-off valve 13b are operated in the opposite direction to those during cooling.
１３ｄ、第１および第２室内側熱交換器１１ 、１２、
開閉弁１３ａ 、 １３ｂ、暖房管路７の暖房キャピラ
リチューブ６、室外側熱交換器３、四方弁２、圧縮機１
の順序で冷媒が循環する。このとき、第１および第乏室
内側熱交換器１１ 、１２によって２部屋の暖房が行ケ
われでいるものであるが、例えば、第２室、′、、′
内側熱交換器１２の運転を休止して１部屋のみの暖房を
行なう場各、第１室内側熱交換器１１の□み、運転が行
なわれ、第２室内側熱交換器１２側の管路に設けられた
開閉弁１３ｃ 、 １３ｄは閉止される。そして、第２
室内側熱交換器１２の内部に残留している冷媒は、冷媒
戻し管１７を通り暖房キャピラリチューブ６の低圧であ
る出口側へ送られろ。13d, first and second indoor heat exchangers 11, 12,
On-off valves 13a, 13b, heating capillary tube 6 of heating pipe line 7, outdoor heat exchanger 3, four-way valve 2, compressor 1
The refrigerant circulates in this order. At this time, two rooms are being heated by the first and poor indoor heat exchangers 11 and 12, but for example, the operation of the inner heat exchangers 12 in the second room, ', ,' When heating only one room during a pause, the first indoor heat exchanger 11 is operated, and the on-off valve 13c provided in the conduit on the second indoor heat exchanger 12 side, 13d is closed. And the second
The refrigerant remaining inside the indoor heat exchanger 12 is sent to the low-pressure outlet side of the heating capillary tube 6 through the refrigerant return pipe 17.
上記のような冷凍サイクルの場合、２つの室内側熱交換
器を運転している状態で最適となるように冷媒量等の調
整が行なわれている場合には、一方の室内側熱交換器を
休止したとき、他方の室内側熱交換器に冷媒の過充填が
発生し、この冷媒が冷媒戻し管１７を通り低圧側へ液冷
媒の状態で戻るいわゆる液バツク現象が生じることによ
る能力不足が生じるという欠点を有している。In the case of the above-mentioned refrigeration cycle, if the amount of refrigerant, etc. is adjusted to be optimal with two indoor heat exchangers in operation, one indoor heat exchanger may be operated. When it is stopped, the other indoor heat exchanger is overfilled with refrigerant, and this refrigerant passes through the refrigerant return pipe 17 and returns to the low pressure side in the form of liquid refrigerant, resulting in a capacity shortage due to the so-called liquid refrigerant phenomenon. It has the following drawbacks.
また、上記のような冷媒戻し管を有さない冷凍サイクル
では、休止した室内側熱交換器の内部に冷媒が残留した
ままとなり、運転中の室内側熱交換器への冷媒量不足が
生じるという欠点を有している。 、
・
〔発明の目的〕
本発明は上記欠点に鑑み□てなされたもので、マル、チ
型空気調和機の冷凍サイクルにおいて複数の室内側熱交
換器の内、一部が休止した場合の負荷変動に対して、冷
媒量の過不足が生じ′ない冷凍サイクルを提供すること
を目的とするものである。In addition, in a refrigeration cycle without a refrigerant return pipe as described above, refrigerant remains inside the indoor heat exchanger when it is stopped, resulting in a shortage of refrigerant to the indoor heat exchanger during operation. It has its drawbacks. ,
・ [Objective of the Invention] The present invention has been made in view of the above-mentioned drawbacks, and is intended to solve the problem of load fluctuations when some of the indoor heat exchangers are stopped in the refrigeration cycle of a double- or triple-type air conditioner. However, the object of the present invention is to provide a refrigeration cycle in which there is no excess or deficiency in the amount of refrigerant.
〔発明の概要〕 □
上記目的を達成するため本発明に係る冷凍サイクルは、
圧縮機、四方弁、室外側熱交換器、減圧器を順次管路で
接続するととも・に、複、数の室内側熱交換器を上記減
圧器およ、び四方弁側にそれぞれ開閉弁を介して並列に
接続し、上記複数の室内側熱交換器と上記減圧側開閉弁
との間の管路と、上記室外側熱交換器と上記減圧器との
間の管路とを減圧器を介して接続してなる冷媒戻し管を
有する冷凍サイクルにおいて、上記四方弁側開閉弁をバ
イパスし、減圧器を有するバイパス管を設けて構成され
、室内側熱交換器の休止時においても、冷媒が流れるよ
うになされている。[Summary of the invention] □ In order to achieve the above object, the refrigeration cycle according to the present invention has the following features:
The compressor, four-way valve, outdoor heat exchanger, and pressure reducer are connected in sequence through pipes, and multiple indoor heat exchangers are connected to the pressure reducer and the four-way valve with on-off valves, respectively. A pressure reducer is connected in parallel through a pipe line between the plurality of indoor heat exchangers and the pressure reduction side on-off valve, and a pipe line between the outdoor heat exchanger and the pressure reducer. In a refrigeration cycle having a refrigerant return pipe connected through It is made to flow.
以下、本発明の実施例を第２図を参照して説明し、第１
図と同一部分には同一符号を付してその説明を省略する
。Hereinafter, embodiments of the present invention will be explained with reference to FIG.
Components that are the same as those in the figures are given the same reference numerals and their explanations will be omitted.
第２図に示すように本実施例においては、四方弁２と開
閉弁１３ｂ 、 １３ｄとの間の管路と、この開閉弁１
３ｂ 、 １３ｄと第１および８ｒ！２室内側熱交換器
１１゜１２との間の管路とをそれぞれキャピラリチュー
ブ２０ａ、２０ｂを介して接続してなるバイパス管２１
ａ。As shown in FIG. 2, in this embodiment, the pipe line between the four-way valve 2 and the on-off valves 13b and 13d, and the on-off valve 1
3b, 13d and 1st and 8r! Bypass pipe 21 connecting the two indoor heat exchangers 11 and 12 via capillary tubes 20a and 20b, respectively.
a.
２１ｂが設けられている。21b is provided.
本実施例においては、例えば暖房時に第２室内側熱交換
器１２が休止して、第１室内側熱交換器１１のみを運転
している場合、図中の破線矢印に示すように、圧縮機１
から送り出された冷媒は四方弁２を通り、第１霊内側熱
交換器１１へ流れるが、その冷媒の一部は上記バイパス
管２１ｂを通り、さらに休止している第２室内側熱交換
器１２を通った後、冷媒戻し管１７により、暖房キャビ
ラリチューブ６の出口側に流れる。In this embodiment, for example, when the second indoor heat exchanger 12 is stopped during heating and only the first indoor heat exchanger 11 is operated, the compressor 1
The refrigerant sent out passes through the four-way valve 2 and flows to the first indoor heat exchanger 11, but a part of the refrigerant passes through the bypass pipe 21b and then flows into the second indoor heat exchanger 12, which is inactive. After passing through the refrigerant return pipe 17 , the refrigerant flows to the outlet side of the heating cavity tube 6 .
したがって、２つの室内側熱交換器１１ 、１２の運転
時に適切な冷媒量を調節した場合であっても、休止した
第２室内側熱交換器１２に冷媒が流れるため運転中の第
１室内側熱交換器１１に冷媒の過充填が発生することが
ない。しかも、冷媒戻し管１７を併有しているため、冷
媒が第２電内側熱交換器１２に残留することもない。Therefore, even if an appropriate amount of refrigerant is adjusted during operation of the two indoor heat exchangers 11 and 12, the refrigerant flows to the second indoor heat exchanger 12 that is inactive, so the first indoor heat exchanger 12 is in operation. Overfilling of the refrigerant in the heat exchanger 11 does not occur. Moreover, since the refrigerant return pipe 17 is also included, the refrigerant does not remain in the second electric inner heat exchanger 12.
また、休止中の室内側熱交換器を流れろ冷媒は、バイパ
ス管２１ｂのキャピラリチューブ２０ｂおよび冷媒戻し
管】７のキャピラリチューブ１５ｂにより低温低圧ガス
となって流れるため、熱喪失もほとんどなく効率がよい
。In addition, the refrigerant flowing through the indoor heat exchanger that is inactive flows as a low-temperature, low-pressure gas through the capillary tube 20b of the bypass pipe 21b and the capillary tube 15b of the refrigerant return pipe 7, resulting in high efficiency with almost no heat loss. .
なお、本実施例においては、室内側熱交換器が２つの場
合を示したが、それ以上の熱交換器を接続する場合であ
っても同様であることはもちろんである。In this embodiment, the case where there are two indoor heat exchangers is shown, but it goes without saying that the same applies even when more heat exchangers are connected.
以上述べたように本発明に係る冷凍サイクルは、複数の
室内側熱交換器の減圧器および四方弁側に設けられた開
閉弁の減圧器側開閉弁をバイパスして冷媒を低圧側へ流
す冷媒戻し管を設けてなる冷凍サイクルにおいて、上記
四方弁側開閉弁をバイパスするバイパス管を減圧器を介
１〜で接続して構成され、室内側熱交換器が休止して上
記開閉弁が閉止された場合でも、冷媒の一部が上記バイ
パス管および冷媒戻し管をが１つて流れろようにしたの
で、運転中の室内側熱交換器への冷媒の過充填を防ぐこ
とができ、能力不足が生じることもないので、冷媒量を
最大負Ｍ点に調整することか可能である。As described above, in the refrigeration cycle according to the present invention, the refrigerant bypasses the pressure reducer of the plurality of indoor heat exchangers and the pressure reducer side on-off valve of the four-way valve side and flows the refrigerant to the low pressure side. In a refrigeration cycle provided with a return pipe, a bypass pipe that bypasses the four-way valve side on-off valve is connected to 1 through a pressure reducer, and the indoor heat exchanger is stopped and the on-off valve is closed. Even if the refrigerant is in use, a portion of the refrigerant is allowed to flow through the bypass pipe and refrigerant return pipe, which prevents overfilling of the refrigerant into the indoor heat exchanger during operation, resulting in insufficient capacity. Therefore, it is possible to adjust the amount of refrigerant to the maximum negative M point.
また、冷媒戻し管により、休止中の熱交換器内に冷媒が
残留ずろことがないので、再運転時の立上がりも速くな
る。さらに、休止中の熱交換器を流れる冷媒は減圧器に
より低温低圧となつ−（流れるため熱喪失を少なくする
ことかできる等の効果を有する。In addition, the refrigerant return pipe prevents refrigerant from remaining in the heat exchanger when the heat exchanger is not in use, so that the restart is faster. Furthermore, since the refrigerant flowing through the heat exchanger when it is inactive is brought to a low temperature and low pressure by the pressure reducer, it has the effect of reducing heat loss.
第１図は従来の冷凍ザイクルを示す系統図、第２図は本
発明に係る冷凍サイクルの一実施例を示す系統図である
。
１、・・・圧縮機、２・・・四方弁、３・・・室外側熱
交換器、４・・・管路、５ 、９．１６．１８・・・逆
止弁、６・・・暖房キャピラリチューブ、７・・・暖房
管路、８・・・冷房キャピラリチューブ、１０・・・冷
房管路、１１ 、１２・・・室内側熱交換器、１３・・
・開閉弁、１４・・・分岐管、１５゜２０・・・ギヤピ
ラリチューブ、１７・・・冷媒戻し管、１９・・・冷房
管、２１・・・バイパス管。
出願人代理人 猪 股 清
３１５FIG. 1 is a system diagram showing a conventional refrigeration cycle, and FIG. 2 is a system diagram showing an embodiment of the refrigeration cycle according to the present invention. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Four-way valve, 3... Outdoor heat exchanger, 4... Pipe line, 5, 9.16.18... Check valve, 6... Heating capillary tube, 7... Heating pipe line, 8... Cooling capillary tube, 10... Cooling pipe line, 11, 12... Indoor heat exchanger, 13...
- Opening/closing valve, 14... Branch pipe, 15° 20... Gear pillar tube, 17... Refrigerant return pipe, 19... Cooling pipe, 21... Bypass pipe. Applicant's agent Kiyoshi Inomata 315
Claims (1)
接続するとともに、複数の室内側熱交換器を上記減圧器
および四方弁側にそれぞれ開閉弁を介して並列に接続し
、上記枚数の室内側熱交換器と上記減圧器側開閉弁との
間の管路と、上記室外ｆｌ−１１１熱交換器と上記減圧
器との間の管路とを減圧器を介して接続してなる冷媒戻
し管を有する冷凍サイクルにおいて、上記四方弁側開閉
弁をバイパスし、減圧器を有するバイパス管を設けてな
る冷凍サイクル。A compressor, a four-way valve, an outdoor heat exchanger, and a pressure reducer are connected in sequence through pipes, and a plurality of indoor heat exchangers are connected in parallel to the pressure reducer and the four-way valve through on-off valves, respectively. A pipe line between the above number of indoor heat exchangers and the pressure reducer side on-off valve is connected to a pipe line between the outdoor FL-111 heat exchanger and the pressure reducer via a pressure reducer. A refrigeration cycle having a refrigerant return pipe comprising a refrigerant return pipe, which bypasses the four-way valve side on-off valve and is provided with a bypass pipe having a pressure reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17576782A JPS5966668A (en) | 1982-10-06 | 1982-10-06 | Refrigeration cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17576782A JPS5966668A (en) | 1982-10-06 | 1982-10-06 | Refrigeration cycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5966668A true JPS5966668A (en) | 1984-04-16 |
Family
ID=16001898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17576782A Pending JPS5966668A (en) | 1982-10-06 | 1982-10-06 | Refrigeration cycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5966668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525266U (en) * | 1985-09-26 | 1993-04-02 | キヤリア・コーポレイシヨン | Multi-zone air conditioning system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54142851A (en) * | 1978-04-27 | 1979-11-07 | Matsushita Electric Ind Co Ltd | Heat pump type multi-room air conditioner |
-
1982
- 1982-10-06 JP JP17576782A patent/JPS5966668A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54142851A (en) * | 1978-04-27 | 1979-11-07 | Matsushita Electric Ind Co Ltd | Heat pump type multi-room air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525266U (en) * | 1985-09-26 | 1993-04-02 | キヤリア・コーポレイシヨン | Multi-zone air conditioning system |
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