JPH02122167A - Refrigerant circuit for multiroom air conditioner - Google Patents
Refrigerant circuit for multiroom air conditionerInfo
- Publication number
- JPH02122167A JPH02122167A JP27296188A JP27296188A JPH02122167A JP H02122167 A JPH02122167 A JP H02122167A JP 27296188 A JP27296188 A JP 27296188A JP 27296188 A JP27296188 A JP 27296188A JP H02122167 A JPH02122167 A JP H02122167A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- heat exchanger
- room
- electric expansion
- room heat
- 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
- 239000003507 refrigerant Substances 0.000 title claims abstract description 63
- 239000007788 liquid Substances 0.000 abstract description 16
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 238000001816 cooling Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は１台の室外ユニットに複数台の室内ユニッＩ−
を接続した多室形空気調和機に係り、特に冷媒回路の冷
媒の適正な配分に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for connecting a plurality of indoor units to one outdoor unit.
The present invention relates to a multi-room air conditioner connected to a multi-room air conditioner, and particularly to appropriate distribution of refrigerant in a refrigerant circuit.
従来、多室形空気調和機は複数の室内ユニットを１台の
室外ユニットに接続して、該室内ユニットを個別に運転
、停止するために各々の室内ユニットに電動膨張弁を設
けて、冷・房時は運転室内ユニッ１〜の電動膨張弁で冷
媒の減圧作用を行い、停止室内ユニットの電動膨張弁は
全閉することにより、冷媒の通過を停止していた。暖房
時は運転室内ユニットの電動膨張弁を開き、停止室内ユ
ニットは電動膨張弁をわずかに開くことにより冷媒が室
内ユニットに溜ることを防止していた。なお、この種の
多室形空気調和機として関連するものには例えば特開昭
６３−８３５６３号が挙げられる。Conventionally, in multi-room air conditioners, multiple indoor units are connected to one outdoor unit, and each indoor unit is provided with an electric expansion valve to operate and stop the indoor units individually. During operation, the electric expansion valves of the operating indoor units 1 to 1 reduce the pressure of the refrigerant, and the electric expansion valves of the stop indoor units are fully closed to stop the passage of refrigerant. During heating, the electric expansion valve of the operating indoor unit was opened, and for the stopped indoor unit, the electric expansion valve was slightly opened to prevent refrigerant from accumulating in the indoor unit. Incidentally, related to this type of multi-room air conditioner is, for example, Japanese Patent Application Laid-open No. 83563/1983.
上記のような従来の多室形空気調和機の構成は第２図に
示す通りであり、圧縮機１の吐出部に四方弁２が接続さ
れ、該四方弁２には室外熱交換器３および複数個の室内
熱交換器４ａ、４ｂ、４ｃが接続され、室外熱交換器３
と室内熱交換器４ａ。The configuration of the conventional multi-chamber air conditioner as described above is as shown in FIG. A plurality of indoor heat exchangers 4a, 4b, 4c are connected, and an outdoor heat exchanger 3
and indoor heat exchanger 4a.
４ｂ、４ｃを接続する配管の途中には電動膨張弁５ａ、
５ｂ、５ｃが配置され、該室内熱交換器４ａ、４ｂ、４
ｃの他端は四方弁２と接続され、圧縮機１の吸入部はア
キュムレータ６を介して四方弁２に接続されている。上
述の構成の多室形空気調和機において、冷房運転時は圧
縮機１から吐出された高圧カス冷媒は四方弁２を通り室
外熱交換器３に導かれ、凝縮潜熱を外気に放出して高圧
液冷媒となり、電動膨張弁５ａ、５ｂ、５ｃにより減圧
され室内熱交換器４ａ、４ｂ、４ｃ内で蒸発潜熱を吸収
して室内の冷房を行い、低圧カス冷媒となり四方弁２．
アキュムレータ６を通って圧縮機１に吸入される。室内
ユニットの冷房運転を停止する場合は該室内ユニットに
対応する電動膨張弁を閉じることにより、室内熱交換器
への低圧液冷媒の流入が無くなり、低圧カス冷媒で満た
されるので、余剰冷媒はアキュムレータ６内に貯えられ
る。暖房運転時は四方弁２を切換えて圧縮機１から吐出
された高圧ガス冷媒を室内熱交換器４ａ。There is an electric expansion valve 5a in the middle of the pipe connecting 4b and 4c.
5b, 5c are arranged, and the indoor heat exchangers 4a, 4b, 4
The other end of c is connected to the four-way valve 2, and the suction part of the compressor 1 is connected to the four-way valve 2 via the accumulator 6. In the multi-room air conditioner configured as described above, during cooling operation, the high-pressure waste refrigerant discharged from the compressor 1 passes through the four-way valve 2 and is guided to the outdoor heat exchanger 3, where the latent heat of condensation is released to the outside air and the high-pressure It becomes a liquid refrigerant, is depressurized by the electric expansion valves 5a, 5b, and 5c, and absorbs the latent heat of vaporization in the indoor heat exchangers 4a, 4b, and 4c to cool the room, and becomes a low-pressure waste refrigerant and becomes a four-way valve 2.
It is sucked into the compressor 1 through the accumulator 6. When stopping the cooling operation of an indoor unit, by closing the electric expansion valve corresponding to the indoor unit, the flow of low-pressure liquid refrigerant into the indoor heat exchanger is stopped and the room is filled with low-pressure waste refrigerant, so excess refrigerant is transferred to the accumulator. It can be stored within 6. During heating operation, the four-way valve 2 is switched to transfer the high-pressure gas refrigerant discharged from the compressor 1 to the indoor heat exchanger 4a.
４ｂ、４．ｃに導き、凝縮潜熱を室内空気に放出して室
内の暖房を行い高圧の液冷媒となり、電動膨張弁５ａ、
５ｂ、５ｃにより減圧されて室外熱交換器３に入り外気
から蒸発潜熱を吸収して低圧ガス冷媒となり、四方弁２
．アキュムレータ６を通って圧縮機１に吸入される。室
内ユニットの暖房運転を停止する場合には該室内ユニッ
１〜に対応する電動膨張弁の開度を少なくして冷媒流量
を少なくして室内熱交換器内に液冷媒か溜ることを防止
していた。4b, 4. c, the latent heat of condensation is released into the indoor air to heat the room and become a high-pressure liquid refrigerant, and the electric expansion valve 5a,
5b and 5c, it enters the outdoor heat exchanger 3, absorbs latent heat of vaporization from the outside air, becomes a low-pressure gas refrigerant, and enters the four-way valve 2.
．． It is sucked into the compressor 1 through the accumulator 6. When stopping the heating operation of an indoor unit, the opening degree of the electric expansion valve corresponding to the indoor unit 1 is reduced to reduce the refrigerant flow rate and prevent liquid refrigerant from accumulating in the indoor heat exchanger. Ta.
しかし上記のような多室形空気調和機においては、冷房
運転における室内ユニッ１へ停止時の余剰冷媒を貯溜す
るために大形のアキュムレータ６を必要とする問題があ
った。However, in the multi-room air conditioner as described above, there is a problem in that a large accumulator 6 is required to store surplus refrigerant in the indoor unit 1 during cooling operation when the indoor unit 1 is stopped.
本発明の目的はアキュムレータ６を大形化することなく
多室形空気調和機を構成することにある。１〔課題を解
決するための手段〕
上記目的は、室内熱交換器の冷媒通路の途中に電磁弁を
設けることにより達成される。An object of the present invention is to configure a multi-room air conditioner without increasing the size of the accumulator 6. 1 [Means for Solving the Problem] The above object is achieved by providing a solenoid valve in the middle of the refrigerant passage of the indoor heat exchanger.
室内熱交換器の運転中に冷媒通路に存在する冷媒の状態
は、暖房時には入口部は過熱ガスであり順次凝縮に伴っ
て液比率か増加し出Ｌ１部は若１′−過冷却した液であ
る。一方冷房時は入口部は減圧後のガス液混合状態であ
り順次蒸発に伴って液比率が低下し出口部はガスである
。従って室内ユニットを停止する場合には、上記のよう
な暖冷房時の冷媒量を室内熱交換器に貯溜させれば余剰
冷媒が生じることがないので、室内熱交換器の冷媒通路
の途中に電磁弁を設置して、該電磁弁の位置を暖冷房時
の冷媒入口部から電磁弁迄の冷媒通路容積を液冷媒で満
たした冷媒量が、運転中の室内熱交換器の全冷媒量と一
致させることにより達成される。The state of the refrigerant present in the refrigerant passage during operation of the indoor heat exchanger is that during heating, the inlet part is superheated gas, the liquid ratio increases as it condenses, and the outlet L1 part is a 1'-supercooled liquid. be. On the other hand, during cooling, the inlet section is in a gas-liquid mixed state after the pressure is reduced, and the liquid ratio gradually decreases as evaporation occurs, and the outlet section is in a gas-liquid state. Therefore, when stopping the indoor unit, if the amount of refrigerant used for heating and cooling as described above is stored in the indoor heat exchanger, surplus refrigerant will not be generated. Install a valve and adjust the position of the solenoid valve so that the amount of refrigerant that fills the volume of the refrigerant passage from the refrigerant inlet to the solenoid valve with liquid refrigerant during heating and cooling matches the total amount of refrigerant in the indoor heat exchanger during operation. This is achieved by
以ド、本発明の一実施例を第１図により説明する。室内
熱交換器７ａ、７ｂ、７ｃは冷媒通路の途中に電磁弁８
ａ、８ｂ、８ｃを有し、該電磁弁８ａ、８ｂ、８ｃは運
転時は開き停止時は閉しる。Hereinafter, one embodiment of the present invention will be explained with reference to FIG. The indoor heat exchangers 7a, 7b, and 7c have solenoid valves 8 in the middle of the refrigerant passages.
The electromagnetic valves 8a, 8b, and 8c are opened during operation and closed when stopped.
上記のような構成において室内熱交換器７ａを有する室
内二ニットを暖房時に停止すると電磁弁８ａが閉しるの
で圧縮機１から吐出された高圧ガス冷媒は該電磁弁８ａ
で区分された室内熱交換器７ａの反電動膨張弁５ａ側に
液冷媒として貯溜され、室内熱交換器７ａの電動膨張弁
５ａ側はガス冷媒となる。冷房時には室内熱交換器７ａ
の電動膨張弁５ ｆＪ側に液冷媒が貯溜して、反電動膨
張弁５ａ側はガス冷媒となる。室内熱交換器７ａの冷媒
通路に設ける電磁弁８ａの位置を、暖房運転時の室内熱
交換器７ａ全体に存在する冷媒量と一致するように液冷
媒で存在する内容積を電磁弁８ｄて仕切られる反電動膨
張弁５ａ側の室内熱交換器内容積とし、冷房運転時の室
内熱交換器７ａの全体に存在する冷媒量と一致するよう
に液冷媒で存在する内容積を電磁弁８ａで仕切られる電
動膨張弁５ａ側の室内熱交換器内容積とする。このよう
な室内熱交換器７ａ、７ｂ、７ｃの冷媒の通路途中への
電磁弁８ａ、８ｂ、８ｃの配置を行うと、停止した室内
ユニット内と運転中の室内ユニット内に存在する冷媒量
が等しくなるので、多室形空気調和機の複数台の室内ユ
ニットを任意に停止しても冷媒回路の所要冷媒の過不足
が生じることが無いので、冷媒量調整のためのアキュム
レ−タ９が小形化できる効果がある。In the above-described configuration, when the indoor two-unit unit having the indoor heat exchanger 7a is stopped during heating, the solenoid valve 8a closes, so that the high-pressure gas refrigerant discharged from the compressor 1 is transferred to the solenoid valve 8a.
The refrigerant is stored as a liquid refrigerant on the side opposite to the electric expansion valve 5a of the indoor heat exchanger 7a divided by , and the refrigerant on the electric expansion valve 5a side of the indoor heat exchanger 7a becomes a gas refrigerant. Indoor heat exchanger 7a during cooling
Liquid refrigerant is stored on the electric expansion valve 5 fJ side, and gas refrigerant is stored on the side opposite to the electric expansion valve 5a. The position of the solenoid valve 8a provided in the refrigerant passage of the indoor heat exchanger 7a is partitioned by the solenoid valve 8d so that the internal volume of the liquid refrigerant matches the amount of refrigerant present in the entire indoor heat exchanger 7a during heating operation. The internal volume of the indoor heat exchanger on the opposite side of the electric expansion valve 5a is divided by the electromagnetic valve 8a so that the internal volume of the liquid refrigerant matches the amount of refrigerant present in the entire indoor heat exchanger 7a during cooling operation. This is the internal volume of the indoor heat exchanger on the electric expansion valve 5a side. By arranging the solenoid valves 8a, 8b, and 8c midway through the refrigerant passages of the indoor heat exchangers 7a, 7b, and 7c, the amount of refrigerant present in the stopped indoor units and in the operating indoor units can be reduced. Therefore, even if multiple indoor units of a multi-room air conditioner are stopped arbitrarily, there will be no excess or deficiency of the required refrigerant in the refrigerant circuit, so the accumulator 9 for adjusting the amount of refrigerant can be made small. It has the effect of making it more effective.
本発明によれば、１台の室外ユニットと該室外ユニッ１
〜に接続される複数台の室内ユニソ１−により構成され
る多室形空気調和機において、室内二ニットの熱交換器
の冷媒通路の途中に電磁弁を設置し、該電磁弁により仕
切られる高圧側冷媒部の内容積を暖房運転および冷房運
転時に室内熱交換器の所要の冷媒量か液冷媒として貯溜
される冷媒量と一致させることにより、室内ユニットを
任意に停止しても全体の冷媒配管系に余剰冷媒を生じる
ことがないので圧縮機への液冷媒の戻りを防止するアキ
ュムレータを小形化できる効果がある。According to the present invention, one outdoor unit and the outdoor unit 1
In a multi-room air conditioner consisting of a plurality of indoor unit heat exchangers connected to ~, a solenoid valve is installed in the middle of the refrigerant passage of the indoor two-nit heat exchanger, and the high pressure that is separated by the solenoid valve is installed. By matching the internal volume of the side refrigerant section with the amount of refrigerant required for the indoor heat exchanger or the amount of refrigerant stored as liquid refrigerant during heating and cooling operations, the entire refrigerant piping can be maintained even if the indoor unit is stopped arbitrarily. Since no surplus refrigerant is generated in the system, the accumulator that prevents liquid refrigerant from returning to the compressor can be made smaller.
第１図は本発明の一実施例を具備した多室形空気調和機
の冷凍サイクル説明図、第２図は従来の多室形空気調和
機の冷凍サイクル説明図である。
１・圧縮機、
２・・四方弁、
３ ・室外熱交換器、
４５１〜４ｃ 室内熱交換器、
５８〜５ｃ 電動膨張弁、
６・・・アキュムレータ、
７ａ〜７ｃ・室内熱交換器、
８８〜８ｃ・・電磁弁、
アキュムレータ。FIG. 1 is an explanatory diagram of a refrigeration cycle of a multi-chamber air conditioner equipped with an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a refrigeration cycle of a conventional multi-chamber air conditioner. 1. Compressor, 2. Four-way valve, 3. Outdoor heat exchanger, 451-4c Indoor heat exchanger, 58-5c Electric expansion valve, 6. Accumulator, 7a-7c. Indoor heat exchanger, 88- 8c...Solenoid valve, accumulator.
Claims (1)
１台の室外ユニットと、該室外ユニットに接続される複
数台の室内熱交換器、電動膨張弁等により構成される室
内ユニットの室内熱交換器の冷媒通路の途中に電磁弁を
設置したことを特徴とする多室形空気調和機の冷媒回路
。1. One outdoor unit consisting of a compressor, four-way valve, outdoor heat exchanger, etc., and an indoor unit consisting of multiple indoor heat exchangers, electric expansion valves, etc. connected to the outdoor unit. A refrigerant circuit for a multi-room air conditioner, characterized in that a solenoid valve is installed in the middle of a refrigerant passage of an indoor heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27296188A JPH02122167A (en) | 1988-10-31 | 1988-10-31 | Refrigerant circuit for multiroom air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27296188A JPH02122167A (en) | 1988-10-31 | 1988-10-31 | Refrigerant circuit for multiroom air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02122167A true JPH02122167A (en) | 1990-05-09 |
Family
ID=17521202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27296188A Pending JPH02122167A (en) | 1988-10-31 | 1988-10-31 | Refrigerant circuit for multiroom air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02122167A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144259A (en) * | 1984-08-09 | 1986-03-03 | 株式会社日立製作所 | Air conditioner |
-
1988
- 1988-10-31 JP JP27296188A patent/JPH02122167A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144259A (en) * | 1984-08-09 | 1986-03-03 | 株式会社日立製作所 | Air conditioner |
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