JPH10267322A - Natural circulating type air conditioner - Google Patents

Natural circulating type air conditioner

Info

Publication number
JPH10267322A
JPH10267322A JP7155197A JP7155197A JPH10267322A JP H10267322 A JPH10267322 A JP H10267322A JP 7155197 A JP7155197 A JP 7155197A JP 7155197 A JP7155197 A JP 7155197A JP H10267322 A JPH10267322 A JP H10267322A
Authority
JP
Japan
Prior art keywords
heat exchanger
liquid
refrigerant
gas
pipe
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
Application number
JP7155197A
Other languages
Japanese (ja)
Inventor
Yuzo Sakon
勇三 佐近
Tadao Tsuji
忠男 辻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP7155197A priority Critical patent/JPH10267322A/en
Publication of JPH10267322A publication Critical patent/JPH10267322A/en
Pending legal-status Critical Current

Links

Landscapes

  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized indoor device by a method wherein a cooling operation and a heating operation are changed over from each other by one indoor heat exchanger. SOLUTION: This natural circulating type air conditioner is constructed such that an indoor heat exchanger 22 and a high-level located condenser 12 are connected to each other and the indoor heat exchanger 22 and a low-level located evaporator 13 are connected by a piping system 30. During a cooling operation of the indoor device 21, refrigerant is naturally circulated between the condenser 12 and the indoor heat exchanger 22 and in turn, during a heating operation of the indoor device 21, the refrigerant is naturally circulated between the evaporater 13 and the indoor heat exchanger 22.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、冷媒を自然循環さ
せて空気調和を行う自然循環式空気調和装置に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a natural circulation type air conditioner for circulating air by circulating a refrigerant naturally.

【0002】[0002]

【従来の技術】従来より自然循環式の空気調和装置に
は、特開平3−191236号公報に開示されているよ
うに、ビルの屋上に凝縮器を設置すると共に、室内に室
内熱交換器を設置し、凝縮器と室内熱交換器とを冷媒配
管によって接続してなる冷房専用回路を備えているもの
がある。この冷房専用回路は、凝縮器に供給された冷水
によって冷媒を凝縮させ、この凝縮した液冷媒を室内熱
交換器に自然落下によって供給する。この液冷媒は、室
内空気と熱交換して蒸発し、室内を冷房する。この蒸発
したガス冷媒は膨張によって室内熱交換器から凝縮器に
戻り、この循環を繰り返す。
2. Description of the Related Art Conventionally, in a natural circulation type air conditioner, a condenser is installed on the roof of a building and an indoor heat exchanger is installed in a room, as disclosed in Japanese Patent Application Laid-Open No. 3-191236. Some are provided with a circuit dedicated to cooling, which is installed and connects a condenser and an indoor heat exchanger by refrigerant piping. The cooling-only circuit condenses the refrigerant with the cold water supplied to the condenser, and supplies the condensed liquid refrigerant to the indoor heat exchanger by natural fall. The liquid refrigerant exchanges heat with room air and evaporates, thereby cooling the room. The evaporated gas refrigerant returns from the indoor heat exchanger to the condenser by expansion, and repeats this circulation.

【0003】一方、上記空気調和装置は、ビルの地下に
蒸発器を設置すると共に、室内に室内熱交換器を設置
し、蒸発器と室内熱交換器とを冷媒配管によって接続し
てなる暖房専用回路を備えているものがある。この暖房
専用回路は、蒸発器に供給された温水によって冷媒を蒸
発させ、この蒸発による膨張によってガス冷媒を室内熱
交換器に供給する。このガス冷媒は、室内空気と熱交換
して凝縮し、室内を暖房する。この凝縮した液冷媒は、
自然落下によって室内熱交換器から蒸発器に戻り、この
循環を繰り返す。
On the other hand, the above air conditioner has an evaporator installed in the basement of a building, an indoor heat exchanger installed indoors, and an evaporator and an indoor heat exchanger connected by a refrigerant pipe. Some have circuits. The dedicated heating circuit evaporates the refrigerant by the warm water supplied to the evaporator, and supplies the gas refrigerant to the indoor heat exchanger by expansion due to the evaporation. This gas refrigerant exchanges heat with room air to condense and heat the room. This condensed liquid refrigerant is
It returns from the indoor heat exchanger to the evaporator by natural fall and repeats this circulation.

【0004】[0004]

【発明が解決しようとする課題】上述した自然循環式空
気調和装置は、冷房専用回路と暖房専用回路とを個別に
構成しているため、冷暖房運転を行うようにするために
は、室内熱交換器を2つ設ける必要があり、室内ユニッ
トが大型化し、設置スペースが大きくなるという問題が
あった。
In the natural circulation type air conditioner described above, a circuit dedicated to cooling and a circuit dedicated to heating are separately provided. It is necessary to provide two vessels, and there is a problem that the indoor unit becomes large and the installation space becomes large.

【0005】本発明は、斯かる点に鑑みてなされたもの
で、1つの利用側熱交換器で冷房運転と暖房運転とを切
り換えて行えるようにし、利用側ユニットの小型化を図
ることを目的とするものである。
[0005] The present invention has been made in view of the above point, and an object of the present invention is to make it possible to switch between a cooling operation and a heating operation with one use-side heat exchanger, and to reduce the size of the use-side unit. It is assumed that.

【0006】[0006]

【課題を解決するための手段】[Means for Solving the Problems]

−発明の概要− 本発明は、利用側熱交換器(22)と高所の凝縮器(12)
とを配管系統(30)によって接続すると共に、利用側熱
交換器(22)と低所の蒸発器(13)とを配管系統(30)
によって接続する。冷房運転時に凝縮器(12)と利用側
熱交換器(22)との間で冷媒を自然循環させる一方、暖
房運転時に蒸発器(13)と利用側熱交換器(22)との間
で冷媒を自然循環させる。
-Summary of the invention-The present invention relates to a use side heat exchanger (22) and a condenser at a high place (12).
Are connected by a piping system (30), and the utilization side heat exchanger (22) and the low-level evaporator (13) are connected by a piping system (30).
Connect by. During the cooling operation, the refrigerant naturally circulates between the condenser (12) and the use-side heat exchanger (22), while during the heating operation, the refrigerant flows between the evaporator (13) and the use-side heat exchanger (22). Natural circulation.

【0007】−解決手段− 具体的に、図1に示すように、請求項1に係る発明が講
じた手段は、先ず、高所に配置された凝縮器(12)と、
低所に配置された蒸発器(13)と、上記凝縮器(12)と
蒸発器(13)との中間高さに配置された利用側熱交換器
(22)とが設けられている。そして、該利用側熱交換器
(22)と凝縮器(12)とを配管系統(30)によって接続
すると共に、該利用側熱交換器(22)と蒸発器(13)と
を配管系統(30)によって接続する。加えて、上記利用
側熱交換器(22)の冷房運転時に凝縮器(12)と該利用
側熱交換器(22)との間で冷媒が自然循環すると共に、
上記利用側熱交換器(22)の暖房運転時に蒸発器(13)
と該利用側熱交換器(22)との間で冷媒が自然循環する
ように配管系統(30)の冷媒の流通方向を切り換える流
路切換え手段(40)が設けられている。
[Solution Means] Specifically, as shown in FIG. 1, means taken by the invention according to claim 1 includes a condenser (12) arranged at a high place,
An evaporator (13) arranged at a low place and a use side heat exchanger (22) arranged at an intermediate height between the condenser (12) and the evaporator (13) are provided. Then, the use side heat exchanger (22) and the condenser (12) are connected by a piping system (30), and the use side heat exchanger (22) and the evaporator (13) are connected by a piping system (30). ) To connect. In addition, the refrigerant naturally circulates between the condenser (12) and the use-side heat exchanger (22) during the cooling operation of the use-side heat exchanger (22),
Evaporator (13) during heating operation of the above use side heat exchanger (22)
A flow path switching means (40) for switching the flow direction of the refrigerant in the piping system (30) is provided so that the refrigerant naturally circulates between the heat exchanger and the use-side heat exchanger (22).

【0008】上記の発明特定事項により、請求項1記載
の発明では、冷房運転時において、例えば、凝縮器(1
2)に冷水が供給され、この冷水と冷媒とを熱交換させ
て該冷媒を凝縮させる。この凝縮した液冷媒は、凝縮器
(12)から自然落下によって配管系統(30)を流れ、利
用側熱交換器(22)に流入する。該液冷媒は、利用側熱
交換器(22)で室内空気と熱交換して蒸発し、室内空気
を冷却する。この蒸発したガス冷媒は、膨張によって利
用側熱交換器(22)から配管系統(30)を流れて凝縮器
(12)に戻る。この循環を繰り返し、室内を冷房する。
According to the first aspect of the present invention, during the cooling operation, for example, the condenser (1)
Cold water is supplied to 2), and the cold water and the refrigerant exchange heat to condense the refrigerant. The condensed liquid refrigerant flows from the condenser (12) through the piping system (30) by natural fall, and flows into the use-side heat exchanger (22). The liquid refrigerant exchanges heat with room air in the use side heat exchanger (22) and evaporates, thereby cooling the room air. The vaporized gas refrigerant flows through the piping system (30) from the use-side heat exchanger (22) by expansion and returns to the condenser (12). This circulation is repeated to cool the room.

【0009】また、暖房運転時は、例えば、蒸発器(1
3)に温水が供給され、この温水と冷媒とを熱交換させ
て該冷媒を蒸発させる。この蒸発したガス冷媒は、膨張
によって蒸発器(13)から配管系統(30)を流れ、利用
側熱交換器(22)に流入する。該ガス冷媒は、利用側熱
交換器(22)で室内空気と熱交換して凝縮し、室内空気
を加温する。この凝縮した液冷媒は、自然落下によって
利用側熱交換器(22)から配管系統(30)を流れて蒸発
器(13)に戻る。この循環を繰り返して室内を暖房す
る。
During the heating operation, for example, the evaporator (1
Hot water is supplied to 3), and the hot water and the refrigerant exchange heat to evaporate the refrigerant. The vaporized gas refrigerant flows from the evaporator (13) through the piping system (30) by expansion, and flows into the use-side heat exchanger (22). The gas refrigerant exchanges heat with room air in the use side heat exchanger (22) to condense and heat the room air. The condensed liquid refrigerant flows through the piping system (30) from the use side heat exchanger (22) by natural fall and returns to the evaporator (13). This circulation is repeated to heat the room.

【0010】請求項2記載の発明が講じた手段は、上記
請求項1記載の発明において、凝縮器(12)と蒸発器
(13)とが、主ガス管(MG)と主液管(ML)とによって
接続される一方、該主ガス管(MG)及び主液管(ML)に
は、主ガス管(MG)及び主液管(ML)より分岐した分岐
ガス管(BG)と分岐液管(BL)とを介して利用側熱交換
器(22)が連通した構成としている。
According to a second aspect of the present invention, in the first aspect of the present invention, the condenser (12) and the evaporator (13) include a main gas pipe (MG) and a main liquid pipe (ML). ), The main gas pipe (MG) and the main liquid pipe (ML) have a branch gas pipe (BG) branched from the main gas pipe (MG) and the main liquid pipe (ML), and a branch liquid. The use side heat exchanger (22) communicates with the pipe (BL).

【0011】上記の発明特定事項により、請求項2記載
の発明では、冷房運転時において、凝縮器(12)で凝縮
した液冷媒は、主液管(ML)及び分岐液管(BL)を経て
利用側熱交換器(22)に流入し、該利用側熱交換器(2
2)で蒸発したガス冷媒は、分岐ガス管(BG)及び主ガ
ス管(MG)を経て凝縮器(12)に戻る。
According to the invention, the liquid refrigerant condensed in the condenser (12) passes through the main liquid pipe (ML) and the branch liquid pipe (BL) during the cooling operation. The heat flows into the use side heat exchanger (22), and the use side heat exchanger (2
The gas refrigerant evaporated in 2) returns to the condenser (12) via the branch gas pipe (BG) and the main gas pipe (MG).

【0012】また、暖房運転時は、蒸発器(13)で蒸発
したガス冷媒は、冷房運転時と同じ主ガス管(MG)及び
分岐ガス管(BG)を経て利用側熱交換器(22)に流入
し、該利用側熱交換器(22)で凝縮した液冷媒は、冷房
運転時と同じ分岐液管(BL)及び主液管(ML)を経て蒸
発器(13)に戻る。
In the heating operation, the gas refrigerant evaporated in the evaporator (13) passes through the same main gas pipe (MG) and branch gas pipe (BG) as in the cooling operation, and the use-side heat exchanger (22). The liquid refrigerant that has flowed into the heat exchanger and condensed in the use side heat exchanger (22) returns to the evaporator (13) through the same branch liquid pipe (BL) and main liquid pipe (ML) as in the cooling operation.

【0013】請求項3記載の発明が講じた手段は、上記
請求項1記載の発明において、凝縮器(12)には、冷房
用の主ガス管(MG-1)と主液管(ML-1)とが接続され、
蒸発器(13)には、暖房用の主ガス管(MG-2)と主液管
(ML-2)とが接続された構成としている。そして、該冷
房用及び暖房用の各主ガス管(MG-1,MG-2)と各主液管
(ML-1,ML-2)とには、各主ガス管(MG-1,MG-2)及び
各主液管(ML-1,ML-2)より分岐した冷房用及び暖房用
の各分岐ガス管(BG-1,BG-2)と各分岐液管(BL-1,BL
-2)とを介して利用側熱交換器(22)が連通している。
The means adopted by the third aspect of the present invention is that, in the first aspect of the present invention, the condenser (12) has a main gas pipe (MG-1) for cooling and a main liquid pipe (ML- 1) is connected to
The main gas pipe (MG-2) for heating and the main liquid pipe (ML-2) are connected to the evaporator (13). Each main gas pipe (MG-1, MG-2) is connected to each of the main gas pipes (MG-1, MG-2) for cooling and heating and each of the main liquid pipes (ML-1, ML-2). -2) and each branch gas pipe (BG-1, BG-2) for cooling and heating branched from each main liquid pipe (ML-1, ML-2) and each branch liquid pipe (BL-1, BL)
-2) communicates with the use side heat exchanger (22).

【0014】上記の発明特定事項により、請求項3記載
の発明では、冷房運転時において、凝縮器(12)で凝縮
した液冷媒は、冷房専用の主液管(ML-1)及び分岐液管
(BL-1)を経て利用側熱交換器(22)に流入し、該利用
側熱交換器(22)で蒸発したガス冷媒は、冷房専用の分
岐ガス管(BG-1)及び主ガス管(MG-1)を経て凝縮器
(12)に戻る。
According to the third aspect of the present invention, the liquid refrigerant condensed in the condenser (12) during the cooling operation is supplied to the main liquid pipe (ML-1) and the branch liquid pipe exclusively for cooling. The gas refrigerant flowing into the use side heat exchanger (22) via the (BL-1) and evaporating in the use side heat exchanger (22) is supplied to the branch gas pipe (BG-1) and the main gas pipe dedicated to cooling. Return to the condenser (12) via (MG-1).

【0015】また、暖房運転時は、蒸発器(13)で蒸発
したガス冷媒は、暖房専用の主ガス管(MG-2)及び分岐
ガス管(BG-2)を経て利用側熱交換器(22)に流入し、
該利用側熱交換器(22)で凝縮した液冷媒は、暖房専用
の分岐液管(BL-2)及び主液管(ML-2)を経て蒸発器
(13)に戻る。
During the heating operation, the gas refrigerant evaporated in the evaporator (13) passes through the main gas pipe (MG-2) dedicated to heating and the branch gas pipe (BG-2) to use the heat exchanger (side). 22)
The liquid refrigerant condensed in the use side heat exchanger (22) returns to the evaporator (13) via the branch liquid pipe (BL-2) dedicated to heating and the main liquid pipe (ML-2).

【0016】請求項4記載の発明が講じた手段は、上記
請求項1記載の発明において、配管系統(30)には、少
なくとも凝縮器(12)で凝縮して利用側熱交換器(22)
に流れる冷媒及び、蒸発器(13)で蒸発して利用側熱交
換器(22)に流れる冷媒を液冷媒とガス冷媒とに分離す
る気液分離器(31)を設けた構成としている。
According to a fourth aspect of the present invention, in the first aspect of the present invention, the piping system (30) includes at least the condenser (12) that condenses the use-side heat exchanger (22).
And a gas-liquid separator (31) for separating the refrigerant flowing into the refrigerant and the refrigerant evaporated in the evaporator (13) and flowing into the use side heat exchanger (22) into liquid refrigerant and gas refrigerant.

【0017】上記の発明特定事項により、請求項4記載
の発明では、冷房運転時において、少なくとも凝縮器
(12)で凝縮した冷媒は、気液分離器(31)で液冷媒と
ガス冷媒とに分離され、この液冷媒のみが利用側熱交換
器(22)に流れる。一方、暖房運転時には、少なくとも
蒸発器(13)で蒸発した冷媒は、気液分離器(31)で液
冷媒とガス冷媒とに分離され、このガス冷媒のみが利用
側熱交換器(22)に流れる。
According to the fourth aspect of the present invention, during the cooling operation, at least the refrigerant condensed in the condenser (12) is converted into a liquid refrigerant and a gas refrigerant in the gas-liquid separator (31). It is separated and only this liquid refrigerant flows to the use side heat exchanger (22). On the other hand, during the heating operation, at least the refrigerant evaporated in the evaporator (13) is separated into a liquid refrigerant and a gas refrigerant by the gas-liquid separator (31), and only this gas refrigerant is supplied to the use-side heat exchanger (22). Flows.

【0018】[0018]

【発明の効果】したがって、請求項1記載の発明によれ
ば、利用側熱交換器(22)を凝縮器(12)と蒸発器(1
3)とに切り換えて連通するようにしたために、1の利
用側熱交換器(22)で冷房と暖房とを切り換えて行うこ
とができる。この結果、従来のように冷房専用の利用側
熱交換器と暖房専用の利用側熱交換器とを設ける必要が
なく、1つの利用側熱交換器(22)を設けるのみでよい
ことから、利用側ユニットの小型化を図ることができ、
省スペース化を図ることができる。
According to the first aspect of the present invention, the use-side heat exchanger (22) is connected to the condenser (12) and the evaporator (1).
Since the communication is performed by switching to 3), cooling and heating can be switched by one use side heat exchanger (22). As a result, there is no need to provide a use-side heat exchanger dedicated to cooling and a use-side heat exchanger dedicated to heating as in the related art, and only one provision of the use-side heat exchanger (22) is required. The size of the side unit can be reduced,
Space saving can be achieved.

【0019】また、暖房運転時に冷媒が凝縮器(12)を
流れることなしに利用側熱交換器(22)に流れるように
することができるので、圧力損失を小さくすることがで
き、配管径を小さくすることができる。
Further, since the refrigerant can flow to the use side heat exchanger (22) without flowing through the condenser (12) during the heating operation, the pressure loss can be reduced, and the pipe diameter can be reduced. Can be smaller.

【0020】また、請求項2記載の発明によれば、1本
の主ガス管(MG)と1本の主液管(ML)とを設けるのみ
であるので、配管系統(30)の簡略化を図ることができ
ると共に、配管施工の容易化を図ることができる。
According to the second aspect of the present invention, since only one main gas pipe (MG) and one main liquid pipe (ML) are provided, the piping system (30) is simplified. In addition to this, it is possible to facilitate piping work.

【0021】また、請求項3記載の発明によれば、上記
凝縮器(12)に接続された冷房用の主ガス管(MG-1)及
び主液管(ML-1)と、上記蒸発器(13)に接続された暖
房用の主ガス管(MG-2)及び主液管(ML-2)とを設け、
それぞれ利用側熱交換器(22)が連通するようにしたた
めに、冷房運転を行う利用側熱交換器(22)と暖房運転
を行う利用側熱交換器(22)とを併存させることがで
き、いわゆる冷暖同時運転を行うことができる。この結
果、例えば、冬季には、インテリアゾーンで冷房を、ペ
リメータゾーンで暖房を行うことができ、快適性の向上
を図ることができる。
According to the third aspect of the present invention, the cooling main gas pipe (MG-1) and the main liquid pipe (ML-1) connected to the condenser (12), and the evaporator A main gas pipe for heating (MG-2) and a main liquid pipe (ML-2) connected to (13) are provided,
Since the use side heat exchangers (22) communicate with each other, the use side heat exchangers (22) performing the cooling operation and the use side heat exchangers (22) performing the heating operation can coexist, So-called simultaneous cooling and heating operation can be performed. As a result, for example, in winter, cooling can be performed in the interior zone and heating can be performed in the perimeter zone, and comfort can be improved.

【0022】また、請求項4記載の発明によれば、配管
系統(30)に気液分離器(31)を設けているので、冷房
運転時に液冷媒にガス冷媒が混入することがなく、液冷
媒のみを利用側熱交換器(22)に供給することができる
ことから、利用側熱交換器(22)の蒸発能力の低下を防
止することができる。更に、暖房運転時にガス冷媒のみ
を利用側熱交換器(22)に供給することができることか
ら、液冷媒による利用側熱交換器(22)の凝縮能力の低
下を防止することができる。
According to the fourth aspect of the present invention, since the gas-liquid separator (31) is provided in the piping system (30), the gas refrigerant does not mix with the liquid refrigerant during the cooling operation, and Since only the refrigerant can be supplied to the use side heat exchanger (22), it is possible to prevent a decrease in the evaporation capacity of the use side heat exchanger (22). Furthermore, since only the gas refrigerant can be supplied to the use-side heat exchanger (22) during the heating operation, it is possible to prevent a reduction in the condensation capacity of the use-side heat exchanger (22) due to the liquid refrigerant.

【0023】また、複数の利用側熱交換器(22)のガス
側をそれぞれ別個に気液分離器(31)に接続すると、冷
媒の偏流を防止することができる。
If the gas sides of the plurality of use-side heat exchangers (22) are separately connected to the gas-liquid separator (31), it is possible to prevent the refrigerant from drifting.

【0024】[0024]

【発明の実施の形態1】以下、本発明の実施形態1を図
面に基づいて詳細に説明する。
Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings.

【0025】図1に示すように、空気調和装置(10)
は、例えば、ビルに設置されてビルの室内を空気調和す
るものであって、冷媒をガス相と液相とに相変化させつ
つ自然循環させる自然循環式の冷媒回路(11)を備えて
いる。
As shown in FIG. 1, the air conditioner (10)
For example, a refrigerant circuit (11) installed in a building and air-conditioning the interior of the building, and provided with a natural circulation type refrigerant circuit (11) that naturally circulates refrigerant while changing its phase into a gas phase and a liquid phase. .

【0026】該空気調和装置(10)は、高さ方向の高
所、例えば、ビルの屋上に凝縮器(12)が設置され、高
さ方向の低所、例えば、地下に蒸発器(13)が設置され
る一方、該凝縮器(12)と蒸発器(13)との間の中間高
さに2つの室内系統(20,20)が設けられている。つま
り、ビルの屋上と地下との間の中間のフロアに2つの室
内系統(20,20)が設けられ、該室内系統(20,20)
は、複数の室内ユニット(21,21,…)を備えている。
In the air conditioner (10), a condenser (12) is installed at a height in a height direction, for example, on the roof of a building, and an evaporator (13) is placed in a low place in a height direction, for example, underground. While two indoor systems (20, 20) are provided at an intermediate height between the condenser (12) and the evaporator (13). That is, two indoor systems (20, 20) are provided on an intermediate floor between the rooftop and the basement of the building, and the indoor systems (20, 20) are provided.
Has a plurality of indoor units (21, 21,...).

【0027】該室内ユニット(21,21,…)は、利用側
熱交換器である室内熱交換器(22)と室内ファン(23)
とを備えている。
The indoor units (21, 21,...) Include an indoor heat exchanger (22), which is a use side heat exchanger, and an indoor fan (23).
And

【0028】上記凝縮器(12)は、冷水系統の冷水の入
口管(14)と出口管(15)とが接続され、該冷水系統の
冷水と冷媒回路(11)の冷媒とを熱交換させて該冷媒を
凝縮させるものであり、冷媒回路(11)の冷熱源となっ
ている。
The condenser (12) is connected to an inlet pipe (14) and an outlet pipe (15) of the chilled water of the chilled water system, and exchanges heat between the chilled water of the chilled water system and the refrigerant of the refrigerant circuit (11). The refrigerant is condensed and serves as a cold heat source of the refrigerant circuit (11).

【0029】上記蒸発器(13)は、温水系統の温水の入
口管(16)と出口管(17)とが接続され、該温水系統の
温水と冷媒回路(11)の冷媒とを熱交換させて該冷媒を
蒸発させるものであり、冷媒回路(11)の温熱源となっ
ている。
The evaporator (13) is connected to an inlet pipe (16) and an outlet pipe (17) of hot water of a hot water system, and exchanges heat between the hot water of the hot water system and the refrigerant of the refrigerant circuit (11). The refrigerant evaporates and serves as a heat source for the refrigerant circuit (11).

【0030】一方、上記凝縮器(12)と蒸発器(13)と
各室内熱交換器(22,22,…)とは配管系統(30)によ
って接続され、該配管系統(30)は、冷房用の冷房主ガ
ス管(MG-1)及び冷房主液管(ML-1)の他、暖房用の暖
房主ガス管(MG-2)及び暖房主液管(ML-2)などを備え
ている。
On the other hand, the condenser (12), the evaporator (13) and each indoor heat exchanger (22, 22,...) Are connected by a piping system (30). Cooling main gas pipe (MG-1) and cooling main liquid pipe (ML-1), as well as heating main gas pipe (MG-2) and heating main liquid pipe (ML-2) for heating I have.

【0031】上記冷房主ガス管(MG-1)と冷房主液管
(ML-1)の一端は凝縮器(12)に接続されている。そし
て、該冷房主ガス管(MG-1)は、途中で各室内系統(2
0,20)に対応して2本の冷房用の冷房分岐ガス管(BG-
1,BG-1)に分岐され、該冷房分岐ガス管(BG-1,BG-
1)は、気液分離器(31,31)に接続されている。
One end of the cooling main gas pipe (MG-1) and one end of the cooling main liquid pipe (ML-1) are connected to a condenser (12). The cooling main gas pipe (MG-1) is connected to each indoor system (2
0, 20), two cooling branch gas pipes for cooling (BG-
1, BG-1) and the cooling branch gas pipes (BG-1, BG-
1) is connected to the gas-liquid separator (31, 31).

【0032】上記冷房主液管(ML-1)は、途中で各室内
系統(20,20)に対応して2本の冷房用の冷房分岐液管
(BL-1,BL-1)に分岐され、該冷房分岐液管(BL-1,BL
-1)は、途中に気液分離器(31,31)が接続されると共
に、各室内系統(20,20)の共通液管(CL,CL)に接続
されている。
The cooling main liquid pipe (ML-1) branches on the way into two cooling branch liquid pipes (BL-1, BL-1) corresponding to the respective indoor systems (20, 20). The cooling branch liquid pipes (BL-1, BL
-1) is connected to the common liquid pipes (CL, CL) of each indoor system (20, 20) while the gas-liquid separators (31, 31) are connected on the way.

【0033】上記暖房主ガス管(MG-2)と暖房主液管
(ML-2)の一端は蒸発器(13)に接続されている。そし
て、該暖房主ガス管(MG-2)は、途中で各室内系統(2
0,20)に対応して2本の暖房用の暖房分岐ガス管(BG-
2,BG-2)に分岐され、該暖房分岐ガス管(BG-2,BG-
2)は、気液分離器(31,31)に接続されている。
One end of the heating main gas pipe (MG-2) and one end of the heating main liquid pipe (ML-2) are connected to an evaporator (13). The heating main gas pipe (MG-2) is connected to each indoor system (2
0, 20), two heating branch gas pipes for heating (BG-
2, BG-2), and the heating branch gas pipe (BG-2, BG-
2) is connected to the gas-liquid separator (31, 31).

【0034】上記暖房主液管(ML-2)は、途中で各室内
系統(20,20)に対応して2本の暖房用の暖房分岐液管
(BL-2,BL-2)に分岐され、該暖房分岐液管(BL-2,BL
-2)は、各室内系統(20,20)の共通液管(CL,CL)に
接続されている。また、上記暖房主液管(ML-2)には、
冷媒の流量調節及び減圧等を行うキャピラリチューブよ
りなる絞り機構(32)が蒸発器(13)の近傍に設けられ
ている。
The heating main liquid pipe (ML-2) branches on the way into two heating branch liquid pipes (BL-2, BL-2) corresponding to the respective indoor systems (20, 20). And the heating branch liquid pipe (BL-2, BL
-2) is connected to the common liquid pipe (CL, CL) of each indoor system (20, 20). In addition, the heating main liquid pipe (ML-2)
A throttle mechanism (32) composed of a capillary tube for adjusting the flow rate of the refrigerant, reducing the pressure, and the like is provided near the evaporator (13).

【0035】上記室内ユニット(21,21,…)の室内熱
交換器(22,22,…)には、配管系統(30)を構成する
室内ガス管(RG)と室内液管(RL)の一端がそれぞれ接
続され、該各室内ガス管(RG,RG,…)の他端は、それ
ぞれ別個に気液分離器(31)に接続されている。上記各
室内液管(RL,RL,…)の他端は、それぞれ共通液管
(CL)に接続されると共に、該各室内液管(RL,RL,
…)には、冷媒の流量調節及び減圧等を行うキャピラリ
チューブよりなる室内絞り機構(33)と、室内熱交換器
(22,22,…)から共通液管(CL,CL)に向かう流通の
みを許容する一方向弁(34)とが並列に設けられてい
る。
The indoor heat exchangers (22, 22,...) Of the indoor units (21, 21,...) Have an indoor gas pipe (RG) and an indoor liquid pipe (RL) constituting a piping system (30). One end is connected to each, and the other end of each of the indoor gas pipes (RG, RG,...) Is separately connected to a gas-liquid separator (31). The other end of each of the indoor liquid pipes (RL, RL,...) Is connected to a common liquid pipe (CL), and the indoor liquid pipes (RL, RL,.
…) Includes only an indoor throttle mechanism (33) consisting of a capillary tube that controls the flow rate and decompression of the refrigerant, and the flow from the indoor heat exchangers (22, 22, ...) to the common liquid pipes (CL, CL). And a one-way valve (34) that allows the pressure to flow is provided in parallel.

【0036】また、上記冷媒回路(11)には、冷媒の流
通方向を切り換える流路切換え手段(40)が設けられて
いる。該流路切換え手段(40)は、冷房運転時に凝縮器
(12)と各室内熱交換器(22,22,…)との間で冷媒を
自然循環させる一方、暖房運転時に蒸発器(13)と各室
内熱交換器(22,22,…)との間で冷媒を自然循環させ
るもので、複数の電磁弁(SV11,SV21,…)で構成され
ている。
The refrigerant circuit (11) is provided with a flow path switching means (40) for switching the direction of refrigerant flow. The flow path switching means (40) allows the refrigerant to circulate naturally between the condenser (12) and each of the indoor heat exchangers (22, 22, ...) during the cooling operation, and the evaporator (13) during the heating operation. The refrigerant naturally circulates between each of the indoor heat exchangers (22, 22,...) And includes a plurality of solenoid valves (SV11, SV21,...).

【0037】具体的に、上記各冷房分岐ガス管(BG-1,
BG-1)には、冷房運転時に開口し、暖房運転時に閉鎖す
るガス電磁弁(SV11,SV21)が設けられると共に、上記
各冷房分岐液管(BL-1,BL-1)には、冷房運転時に開口
し、暖房運転時に閉鎖する液電磁弁(SV12,SV22,SV1
3,SV23)が気液分離器(31)の上流側と下流側とに設
けられている。
More specifically, each of the cooling branch gas pipes (BG-1,
BG-1) is provided with gas solenoid valves (SV11, SV21) that are opened during the cooling operation and closed during the heating operation, and each of the cooling branch liquid pipes (BL-1, BL-1) is provided with the cooling air. Liquid solenoid valves (SV12, SV22, SV1) that open during operation and close during heating operation
3, SV23) are provided upstream and downstream of the gas-liquid separator (31).

【0038】上記各暖房分岐ガス管(BG-2,BG-2)に
は、暖房運転時に開口し、冷房運転時に閉鎖するガス電
磁弁(SV14,SV24)が設けられると共に、上記各暖房分
岐液管(BL-2,BL-2)には、暖房運転時に開口し、冷房
運転時に閉鎖する液電磁弁(SV15,SV25)が設けられて
いる。
Each of the heating branch gas pipes (BG-2, BG-2) is provided with a gas solenoid valve (SV14, SV24) that opens during heating operation and closes during cooling operation. The pipes (BL-2, BL-2) are provided with liquid solenoid valves (SV15, SV25) that open during the heating operation and close during the cooling operation.

【0039】上記各室内ガス管(RG,RG,…)には、各
室内ユニット(21,21,…)の冷房運転時及び暖房運転
時に開口し、運転停止時に閉鎖する室内ガス電磁弁(SV
16,SV16,…)が設けられると共に、各室内液管(RL,
RL,…)には、各室内ユニット(21,21,…)の冷房運
転時及び暖房運転時に開口し、運転停止時に閉鎖する室
内液電磁弁(SV17,SV17,…)が設けられている。
The indoor gas pipes (RG, RG,...) Are opened during the cooling operation and the heating operation of each indoor unit (21, 21,...), And closed when the operation is stopped.
16, SV16, ...), and each indoor liquid pipe (RL,
RL,...) Are provided with indoor liquid solenoid valves (SV17, SV17,...) That open during the cooling operation and the heating operation of each indoor unit (21, 21,...) And close when the operation is stopped.

【0040】また、上記各分岐液管(BL-1,BL-1)に
は、気液分離器(31)の下流側と液電磁弁(SV13,SV2
3)との間に液戻し管(35,35)が接続され、該液戻し
管(35)は、暖房運転時に気液分離器(31)に溜った液
冷媒を蒸発器(13)に戻すもので、暖房主液管(ML-2)
に接続され、リターン電磁弁(SV18,SV28)が設けられ
ている。
The branch liquid pipes (BL-1, BL-1) are connected to the downstream side of the gas-liquid separator (31) and the liquid solenoid valves (SV13, SV2).
A liquid return pipe (35, 35) is connected between the evaporator (3) and the liquid return pipe (35). The liquid return pipe (35) returns the liquid refrigerant accumulated in the gas-liquid separator (31) during the heating operation to the evaporator (13). The main liquid pipe for heating (ML-2)
And return solenoid valves (SV18, SV28) are provided.

【0041】−冷暖房運転動作− 次に、上記空気調和装置(10)の空調運転の動作につい
て説明する。先ず、冷房運転の動作から説明する。
-Air-conditioning operation- Next, the air-conditioning operation of the air conditioner (10) will be described. First, the operation of the cooling operation will be described.

【0042】この冷房運転時においては、流路切換え手
段(40)における冷房分岐ガス管(BG-1,BG-1)のガス
電磁弁(SV11,SV21)及び、冷房分岐液管(BL-1,BL-
1)の液電磁弁(SV12,SV22,SV13,SV23)を開口する
一方、暖房分岐ガス管(BG-2,BG-2)のガス電磁弁(SV
14,SV24)、暖房分岐液管(BL-2,BL-2)の液電磁弁
(SV15,SV25)及び、液戻し管(35,35)のリターン電
磁弁(SV18,SV28)を閉鎖する。また、各室内ユニット
(21,21,…)の室内ガス電磁弁(SV16,SV16,…)及
び室内液電磁弁(SV17,SV17,…)は運転時に開口し、
運転停止時に閉鎖する。
During the cooling operation, the gas solenoid valves (SV11, SV21) of the cooling branch gas pipes (BG-1, BG-1) and the cooling branch liquid pipe (BL-1) in the flow path switching means (40). , BL-
While the liquid solenoid valves (SV12, SV22, SV13, SV23) of 1) are opened, the gas solenoid valves (SV) of the heating branch gas pipes (BG-2, BG-2) are opened.
14, SV24), the liquid solenoid valves (SV15, SV25) of the heating branch liquid pipes (BL-2, BL-2) and the return solenoid valves (SV18, SV28) of the liquid return pipes (35, 35) are closed. The indoor gas solenoid valves (SV16, SV16, ...) and indoor liquid solenoid valves (SV17, SV17, ...) of each indoor unit (21, 21, ...) are opened during operation,
Closes when operation is stopped.

【0043】この状態において、凝縮器(12)の凝縮動
作のみを行い、蒸発器(13)の蒸発動作を停止する。つ
まり、上記凝縮器(12)には、冷水系統から冷水が供給
され、この冷水と冷媒回路(11)の冷媒とが熱交換して
該冷媒を凝縮させる。この凝縮した液冷媒は、図1の実
線矢符に示すように、自然落下によって冷房主液管(ML
-1)から各室内系統(20,20)に対応した2本の冷房分
岐液管(BL-1,BL-1)を流れ、それぞれ気液分離器(3
1,31)に流入し、該気液分離器(31,31)でガス冷媒
が分離する。
In this state, only the condensation operation of the condenser (12) is performed, and the evaporation operation of the evaporator (13) is stopped. That is, cold water is supplied to the condenser (12) from the cold water system, and the cold water and the refrigerant in the refrigerant circuit (11) exchange heat to condense the refrigerant. The condensed liquid refrigerant is naturally dropped by the cooling main liquid pipe (ML) as shown by a solid arrow in FIG.
-1) flows through the two cooling branch liquid pipes (BL-1, BL-1) corresponding to each indoor system (20, 20), and the gas-liquid separators (3
1, 31), and the gas refrigerant is separated by the gas-liquid separator (31, 31).

【0044】その後、上記各気液分離器(31,31)の液
冷媒は、自然落下によって冷房分岐液管(BL-1,BL-1)
及び共通液管(CL,CL)を経て室内液管(RL,RL,…)
を流れ、室内絞り機構(33,33,…)を経て室内熱交換
器(22,22,…)に流入する。上記液冷媒は、室内熱交
換器(22,22,…)で室内空気と熱交換して蒸発し、室
内空気を冷却する。この蒸発したガス冷媒は、膨張によ
って室内熱交換器(22,22,…)から室内ガス管(RG,
RG,…)を流れて気液分離器(31,31)に流入し、該気
液分離器(31,31)で液冷媒が分離する。
Thereafter, the liquid refrigerant of each of the gas-liquid separators (31, 31) is allowed to fall naturally and the cooling branch liquid pipes (BL-1, BL-1)
And indoor liquid pipes (RL, RL, ...) through common liquid pipes (CL, CL)
Flows into the indoor heat exchanger (22, 22,...) Via the indoor throttle mechanism (33, 33,...). The liquid refrigerant exchanges heat with room air in the indoor heat exchangers (22, 22,...) To evaporate, thereby cooling the room air. The vaporized gas refrigerant is expanded by the indoor heat exchangers (22,22, ...) from the indoor gas pipes (RG,
RG, ...), flows into the gas-liquid separator (31, 31), and the liquid refrigerant is separated by the gas-liquid separator (31, 31).

【0045】続いて、上記気液分離器(31,31)のガス
冷媒は、冷房分岐ガス管(BG-1,BG-1)及び冷房主ガス
管(MG-1)を流れて凝縮器(12)に戻り、この循環を繰
り返す。この冷媒循環によって室内を冷房する。
Subsequently, the gas refrigerant of the gas-liquid separators (31, 31) flows through the cooling branch gas pipes (BG-1, BG-1) and the cooling main gas pipe (MG-1), and flows through the condenser (31). Return to 12) and repeat this cycle. The room is cooled by the circulation of the refrigerant.

【0046】次に、暖房運転の動作について説明する
と、この暖房運転時は、暖房分岐ガス管(BG-2,BG-2)
のガス電磁弁(SV14,SV24)、暖房分岐液管(BL-2,BL
-2)の液電磁弁(SV15,SV25)及び、液戻し管(35,3
5)のリターン電磁弁(SV18,SV28)を開口する一方、
冷房分岐ガス管(BG-1,BG-1)のガス電磁弁(SV11,SV
21)及び、冷房分岐液管(BL-1,BL-1)の液電磁弁(SV
12,SV22,SV13,SV23)を閉鎖する。また、冷房運転時
と同様に、各室内ユニット(21,21,…)の室内ガス電
磁弁(SV16,SV16,…)及び室内液電磁弁(SV17,SV1
7,…)は運転時に開口し、運転停止時に閉鎖する。
Next, the operation of the heating operation will be described. During the heating operation, the heating branch gas pipes (BG-2, BG-2)
Gas solenoid valve (SV14, SV24), heating branch liquid pipe (BL-2, BL
-2) liquid solenoid valve (SV15, SV25) and liquid return pipe (35, 3
5) Open return solenoid valves (SV18, SV28),
Gas solenoid valve (SV11, SV) for cooling branch gas pipe (BG-1, BG-1)
21) and the liquid solenoid valve (SV) of the cooling branch liquid pipe (BL-1, BL-1)
12, SV22, SV13, SV23). Similarly to the cooling operation, the indoor gas solenoid valves (SV16, SV16, ...) and indoor liquid solenoid valves (SV17, SV1) of each indoor unit (21, 21, ...)
7, ...) open during operation and close when operation is stopped.

【0047】この状態において、蒸発器(13)の蒸発動
作のみを行い、凝縮器(12)の凝縮動作を停止する。つ
まり、上記蒸発器(13)には、温水系統から温水が供給
され、この温水と冷媒回路(11)の冷媒とが熱交換して
該冷媒を蒸発させる。この蒸発したガス冷媒は、図1の
鎖線矢符に示すように、膨張によって蒸発器(13)から
暖房主ガス管(MG-2)を流れ、各室内系統(20,20)に
対応した2本の暖房分岐ガス管(BG-2,BG-2)を流れ、
それぞれ気液分離器(31,31)に流入し、該気液分離器
(31,31)で液冷媒が分離する。
In this state, only the evaporation operation of the evaporator (13) is performed, and the condensation operation of the condenser (12) is stopped. That is, hot water is supplied from the hot water system to the evaporator (13), and the hot water and the refrigerant in the refrigerant circuit (11) exchange heat to evaporate the refrigerant. The vaporized gas refrigerant flows through the heating main gas pipe (MG-2) from the evaporator (13) due to expansion as shown by a chain line arrow in FIG. 1, and corresponds to each indoor system (20, 20). Flow through the heating branch gas pipes (BG-2, BG-2)
Each flows into the gas-liquid separator (31, 31), and the liquid refrigerant is separated by the gas-liquid separator (31, 31).

【0048】その後、上記各気液分離器(31,31)のガ
ス冷媒は、各室内ガス管(RG,RG,…)を流れて室内熱
交換器(22,22,…)に流入し、該ガス冷媒は、室内熱
交換器(22,22,…)で室内空気と熱交換して凝縮し、
室内空気を加温する。この凝縮した液冷媒は、自然落下
によって室内熱交換器(22,22,…)から室内液管(R
L,RL,…)を流れ、一方向弁(34)を経て共通液管(C
L,CL)を流れる。そして、上記液冷媒は、暖房分岐液
管(BL-2,BL-2)及び暖房主液管(ML-2)を流れ、絞り
機構(32)を介して蒸発器(13)に戻り、この循環を繰
り返す。この冷媒循環によって室内を暖房する。
Thereafter, the gas refrigerant of each of the gas-liquid separators (31, 31) flows through each indoor gas pipe (RG, RG,...) And flows into the indoor heat exchangers (22, 22,...). The gas refrigerant exchanges heat with indoor air in the indoor heat exchangers (22, 22,...) To condense,
Warm the room air. The condensed liquid refrigerant flows from the indoor heat exchangers (22, 22, ...) to the indoor liquid pipe (R
L, RL, ...), and through the one-way valve (34), the common liquid pipe (C
L, CL). Then, the liquid refrigerant flows through the heating branch liquid pipes (BL-2, BL-2) and the heating main liquid pipe (ML-2), and returns to the evaporator (13) via the throttle mechanism (32). Repeat circulation. The room is heated by the circulation of the refrigerant.

【0049】尚、上記暖房運転時において、気液分離器
(31,31)に溜る液冷媒は、自然落下によって液戻し管
(35,35)を流れて蒸発器(13)に戻る。
During the heating operation, the liquid refrigerant stored in the gas-liquid separator (31, 31) flows through the liquid return pipes (35, 35) by natural fall and returns to the evaporator (13).

【0050】また、冷房運転と暖房運転とを同時に行う
場合には、上記凝縮器(12)の凝縮動作と蒸発器(13)
の蒸発動作とを同時に行う。
When the cooling operation and the heating operation are performed simultaneously, the condensation operation of the condenser (12) and the evaporator (13)
And the evaporating operation are performed simultaneously.

【0051】例えば、図1における上段の第1の室内系
統(20)が冷房運転を行い、下段の第2の室内系統(2
0)が暖房運転を行う場合、第1の室内系統(20)に対
応した冷房分岐ガス管(BG-1)のガス電磁弁(SV11)及
び、冷房分岐液管(BL-1)の液電磁弁(SV12,SV13)を
開口し、暖房分岐ガス管(BG-2)のガス電磁弁(SV1
4)、暖房分岐液管(BL-2)の液電磁弁(SV15)及び、
液戻し管(35)のリターン電磁弁(SV18)を閉鎖する。
For example, the upper first indoor system (20) in FIG. 1 performs a cooling operation, and the lower second indoor system (2)
0) performs heating operation, the gas solenoid valve (SV11) of the cooling branch gas pipe (BG-1) corresponding to the first indoor system (20) and the liquid solenoid of the cooling branch liquid pipe (BL-1). Open the valves (SV12, SV13) and open the gas solenoid valve (SV1) of the heating branch gas pipe (BG-2).
4) Liquid solenoid valve (SV15) of heating branch liquid pipe (BL-2) and
Close the return solenoid valve (SV18) of the liquid return pipe (35).

【0052】一方、第2の室内系統(20)に対応した暖
房分岐ガス管(BG-2)のガス電磁弁(SV24)、暖房分岐
液管(BL-2)の液電磁弁(SV25)及び、液戻し管(35)
のリターン電磁弁(SV28)を開口し、冷房分岐ガス管
(BG-1)のガス電磁弁(SV21)及び、冷房分岐液管(BL
-1)の液電磁弁(SV22,SV23)を閉鎖する。また、各室
内ユニット(21,21,…)の室内ガス電磁弁(SV16,SV
16,…)及び室内液電磁弁(SV17,SV17,…)は運転時
に開口し、運転停止時に閉鎖する。
On the other hand, the gas solenoid valve (SV24) of the heating branch gas pipe (BG-2), the liquid solenoid valve (SV25) of the heating branch liquid pipe (BL-2) corresponding to the second indoor system (20), and , Liquid return pipe (35)
Opening the return solenoid valve (SV28) of the cooling branch gas pipe (BG-1) and the gas solenoid valve (SV21) of the cooling branch gas pipe (BG-1)
-1) Close the liquid solenoid valves (SV22, SV23). Also, the indoor gas solenoid valves (SV16, SV16) of each indoor unit (21, 21, ...)
16,) and the indoor liquid solenoid valves (SV17, SV17, ...) are opened during operation and closed when operation is stopped.

【0053】この状態において、第1の室内系統(20)
と凝縮器(12)との間で上述した冷房運転動作が行わ
れ、第2の室内系統(20)と蒸発器(13)との間で上述
した暖房運転動作が行われる。
In this state, the first indoor system (20)
The above-described cooling operation is performed between the second indoor system (20) and the evaporator (13), and the above-described heating operation is performed between the second indoor system (20) and the evaporator (13).

【0054】逆に、上段の第1の室内系統(20)が暖房
運転を行い、下段の第2の室内系統(20)が冷房運転を
行う場合、第1の室内系統(20)に対応した暖房分岐ガ
ス管(BG-2)のガス電磁弁(SV14)、暖房分岐液管(BL
-2)の液電磁弁(SV15)及び、液戻し管(35)のリター
ン電磁弁(SV18)を開口し、冷房分岐ガス管(BG-1)の
ガス電磁弁(SV11)及び、冷房分岐液管(BL-1)の液電
磁弁(SV12,SV13)を閉鎖する。
Conversely, when the upper first indoor system (20) performs the heating operation and the lower second indoor system (20) performs the cooling operation, the first indoor system (20) corresponds to the first indoor system (20). Gas solenoid valve (SV14) for heating branch gas pipe (BG-2), heating branch liquid pipe (BL
-2) Open the liquid solenoid valve (SV15) and the return solenoid valve (SV18) of the liquid return pipe (35), and open the gas solenoid valve (SV11) of the cooling branch gas pipe (BG-1) and the cooling branch liquid. Close the liquid solenoid valves (SV12, SV13) of the pipe (BL-1).

【0055】一方、第2の室内系統(20)に対応した冷
房分岐ガス管(BG-1)のガス電磁弁(SV21)及び、冷房
分岐液管(BL-1)の液電磁弁(SV22,SV23)を開口し、
暖房分岐ガス管(BG-2)のガス電磁弁(SV24)、暖房分
岐液管(BL-2)の液電磁弁(SV25)及び、液戻し管(3
5)のリターン電磁弁(SV28)を閉鎖する。また、各室
内ユニット(21,21,…)の室内ガス電磁弁(SV16,SV
16,…)及び室内液電磁弁(SV17,SV17,…)は運転時
に開口し、運転停止時に閉鎖する。
On the other hand, the gas solenoid valve (SV21) of the cooling branch gas pipe (BG-1) and the liquid solenoid valve (SV22, SV22) of the cooling branch liquid pipe (BL-1) corresponding to the second indoor system (20). SV23)
Gas solenoid valve (SV24) for heating branch gas pipe (BG-2), liquid solenoid valve (SV25) for heating branch liquid pipe (BL-2), and liquid return pipe (3
5) Close the return solenoid valve (SV28). Also, the indoor gas solenoid valves (SV16, SV16) of each indoor unit (21, 21, ...)
16,) and the indoor liquid solenoid valves (SV17, SV17, ...) are opened during operation and closed when operation is stopped.

【0056】この状態において、第1の室内系統(20)
と蒸発器(13)との間で上述した暖房運転動作が行わ
れ、第2の室内系統(20)と凝縮器(12)との間で上述
した冷房運転動作が行われる。
In this state, the first indoor system (20)
The above-described heating operation is performed between the second indoor system (20) and the condenser (12), and the above-described cooling operation is performed between the second indoor system (20) and the condenser (12).

【0057】−実施形態1の効果− 以上のように、本実施形態によれば、各室内熱交換器
(22,22,…)を凝縮器(12)と蒸発器(13)とに切り
換えて連通するようにしたために、1の室内熱交換器
(22)で冷房と暖房とを切り換えて行うことができる。
この結果、従来のように冷房専用の室内熱交換器と暖房
専用の室内熱交換器とを設ける必要がなく、1つの室内
熱交換器(22)を設けるのみでよいことから、室内ユニ
ット(21,21,…)の小型化を図ることができ、省スペ
ース化を図ることができる。
-Effects of Embodiment 1- As described above, according to the present embodiment, each indoor heat exchanger (22, 22, ...) is switched to the condenser (12) and the evaporator (13). Because of the communication, cooling and heating can be switched by one indoor heat exchanger (22).
As a result, there is no need to provide an indoor heat exchanger exclusively for cooling and an indoor heat exchanger exclusively for heating as in the related art, and only one indoor heat exchanger (22) needs to be provided. , 21,...) Can be reduced, and space can be saved.

【0058】また、冷房分岐液管(BL-1,BL-1)を気液
分離器(31,31)に接続しているので、冷房運転時に液
冷媒にガス冷媒が混入することがなく、液冷媒のみを室
内熱交換器(22,22,…)に供給することができること
から、室内熱交換器(22,22,…)の蒸発能力の低下を
防止することができる。
Further, since the cooling branch liquid pipes (BL-1, BL-1) are connected to the gas-liquid separators (31, 31), the gas refrigerant does not mix with the liquid refrigerant during the cooling operation. Since only the liquid refrigerant can be supplied to the indoor heat exchangers (22, 22,...), It is possible to prevent a decrease in the evaporation capacity of the indoor heat exchangers (22, 22,...).

【0059】また、暖房分岐ガス管(BG-2,BG-2)を気
液分離器(31,31)に接続しているので、暖房運転時に
ガス冷媒のみを室内熱交換器(22,22,…)に供給する
ことができることから、液冷媒による室内熱交換器(2
2,22,…)の凝縮能力の低下を防止することができ
る。
Further, since the heating branch gas pipes (BG-2, BG-2) are connected to the gas-liquid separators (31, 31), only the gas refrigerant is supplied to the indoor heat exchangers (22, 22) during the heating operation. , ...), the indoor heat exchanger (2
2, 22, ...) can be prevented from lowering.

【0060】また、凝縮器(12)に接続された冷房主ガ
ス管(MG-1)及び冷房主液管(ML-1)と、蒸発器(13)
に接続された暖房主ガス管(MG-2)及び暖房主液管(ML
-2)とを設け、それぞれ室内熱交換器(22,22,…)が
連通するようにしたために、冷房運転を行う室内熱交換
器(22,22,…)と暖房運転を行う室内熱交換器(22,
22,…)とを併存させることができ、いわゆる冷暖同時
運転を行うことができる。この結果、例えば、冬季に
は、インテリアゾーンで冷房を、ペリメータゾーンで暖
房を行うことができ、快適性の向上を図ることができ
る。
A cooling main gas pipe (MG-1) and a cooling main liquid pipe (ML-1) connected to the condenser (12), and an evaporator (13)
Main gas pipe (MG-2) and main liquid pipe (ML) connected to
-2) and the indoor heat exchangers (22, 22, ...) communicate with each other, so that the indoor heat exchangers (22, 22, ...) that perform cooling operation and the indoor heat exchange that performs heating operation Vessels (22,
22) can coexist, and so-called simultaneous cooling and heating operation can be performed. As a result, for example, in winter, cooling can be performed in the interior zone and heating can be performed in the perimeter zone, and comfort can be improved.

【0061】また、各室内熱交換器(22,22,…)の室
内ガス管(RG,RG,…)をそれぞれ別個に気液分離器
(31,31)に接続しているので、冷媒の偏流を防止する
ことができる。
Further, since the indoor gas pipes (RG, RG,...) Of the indoor heat exchangers (22, 22,...) Are individually connected to the gas-liquid separators (31, 31), respectively. Drift can be prevented.

【0062】また、暖房運転時に冷媒が凝縮器(12)を
流れることなしに室内熱交換器(22,22,…)に流れる
ので、圧力損失を小さくすることができ、配管径を小さ
くすることができる。
Further, since the refrigerant flows through the indoor heat exchangers (22, 22,...) Without flowing through the condenser (12) during the heating operation, the pressure loss can be reduced and the pipe diameter can be reduced. Can be.

【0063】また、液戻し管(35)を設けているので、
暖房運転時に気液分離器(31,31)に溜った液冷媒を蒸
発器(13)に戻すことができる。
Since the liquid return pipe (35) is provided,
The liquid refrigerant accumulated in the gas-liquid separator (31, 31) during the heating operation can be returned to the evaporator (13).

【0064】[0064]

【発明の実施の形態2】本発明の実施形態2は、図2に
示すように、上記実施形態1が室内ガス管(RG,RG,
…)をそれぞれ気液分離器(31,31)に接続したのに代
えて、共通ガス管(CG)を設けるようにしたものであ
る。
Second Embodiment As shown in FIG. 2, the second embodiment of the present invention is different from the first embodiment in that the indoor gas pipes (RG, RG,
) Are connected to the gas-liquid separators (31, 31), respectively, and a common gas pipe (CG) is provided.

【0065】つまり、各室内ユニット(21,21,…)の
室内熱交換器(22,22,…)に接続された各室内ガス管
(RG,RG,…)は、共通ガス管(CG)に接続され、該共
通ガス管(CG)が気液分離器(31)に接続されている。
したがって、本実施形態2によれば、配管施工の容易化
を図ることができる。その他の構成並びに作用及び効果
は実施形態1と同様である。
That is, each indoor gas pipe (RG, RG,...) Connected to the indoor heat exchangers (22, 22,...) Of each indoor unit (21, 21,...) Is a common gas pipe (CG). And the common gas pipe (CG) is connected to the gas-liquid separator (31).
Therefore, according to the second embodiment, it is possible to facilitate the piping work. Other configurations, operations and effects are the same as those of the first embodiment.

【0066】[0066]

【発明の実施の形態3】本発明の実施形態3は、図3に
示すように、上記実施形態2が暖房分岐液管(BL-2)を
共通液管(CL)に直接に接続したのに代えて、暖房分岐
液管(BL-2)を気液分離器(31)に接続するようにした
ものである。
Embodiment 3 In Embodiment 3 of the present invention, as shown in FIG. 3, Embodiment 2 is different from Embodiment 2 in that the heating branch liquid pipe (BL-2) is directly connected to the common liquid pipe (CL). Instead of this, the heating branch liquid pipe (BL-2) is connected to the gas-liquid separator (31).

【0067】つまり、冷房分岐ガス管(BG-1,BG-1)及
び冷房分岐液管(BL-1,BL-1)の他、暖房分岐ガス管
(BG-2,BG-2)及び暖房分岐液管(BL-2,BL-2)が気液
分離器(31,31)にそれぞれ接続される一方、共通ガス
管(CG,CG)及び共通液管(CL,CL)が気液分離器(3
1,31)に接続されている。
That is, in addition to the cooling branch gas pipes (BG-1, BG-1) and the cooling branch liquid pipes (BL-1, BL-1), the heating branch gas pipes (BG-2, BG-2) and the heating branch gas pipes (BG-2, BG-2) The branch liquid pipes (BL-2, BL-2) are connected to the gas-liquid separators (31, 31), respectively, while the common gas pipes (CG, CG) and the common liquid pipes (CL, CL) are used for gas-liquid separation. Bowl (3
1, 31).

【0068】したがって、暖房運転時において、室内熱
交換器(22,22,…)で凝縮した液冷媒は、共通液管
(CL,CL)から一旦気液分離器(31,31)に流入した
後、暖房分岐液管(BL-2,BL-2)及び暖房主液管(ML-
2)を経て蒸発器(13)に戻る。その他の構成並びに作
用及び効果は実施形態2と同様である。尚、図3は、概
略構成を示し、室内液電磁弁(SV16,SV16,…)及び室
内ガス電磁弁(SV17,SV17,…)などは省略している。
Therefore, during the heating operation, the liquid refrigerant condensed in the indoor heat exchanger (22, 22,...) Once flows into the gas-liquid separator (31, 31) from the common liquid pipe (CL, CL). Later, the heating branch liquid pipe (BL-2, BL-2) and the heating main liquid pipe (ML-
After 2), return to the evaporator (13). Other configurations, operations and effects are the same as those of the second embodiment. FIG. 3 shows a schematic configuration, in which the indoor liquid solenoid valves (SV16, SV16,...) And the indoor gas solenoid valves (SV17, SV17,...) Are omitted.

【0069】[0069]

【発明の実施の形態4】本発明の実施形態4は、図4に
示すように、上記実施形態1〜実施形態3が冷房主ガス
管(MG-1)及び冷房主液管(ML-1)と暖房主ガス管(MG
-2)及び暖房主液管(ML-2)とを別個に設けたのに代え
て、1本の主ガス管(MG)及び1本の主液管(ML)を設
けるようにしたものである。
Embodiment 4 In Embodiment 4 of the present invention, as shown in FIG. 4, Embodiments 1 to 3 are different from the cooling main gas pipe (MG-1) and the cooling main liquid pipe (ML-1). ) And heating main gas pipe (MG
-2) and one main gas pipe (MG) and one main liquid pipe (ML) instead of separately providing the heating main liquid pipe (ML-2). is there.

【0070】つまり、凝縮器(12)と蒸発器(13)と
は、1本の主ガス管(MG)及び1本の主液管(ML)によ
って接続される一方、該主ガス管(MG)及び主液管(M
L)から各室内系統(20,20)に対応して2本の分岐ガ
ス管(BG,BG)及び2本の分岐液管(BL,BL)が分岐し
ている。そして、該各分岐ガス管(BG,BG)及び各分岐
液管(BL,BL)が気液分離器(31,31)に接続されると
共に、該気液分離器(31,31)には、実施形態3と同様
に共通ガス管(CG,CG)と共通液管(CL,CL)とを介し
て各室内熱交換器(22,22,…)が接続されている。
That is, the condenser (12) and the evaporator (13) are connected by one main gas pipe (MG) and one main liquid pipe (ML), while the main gas pipe (MG) is connected. ) And main liquid pipe (M
From L), two branch gas pipes (BG, BG) and two branch liquid pipes (BL, BL) are branched corresponding to each indoor system (20, 20). Each of the branch gas pipes (BG, BG) and each of the branch liquid pipes (BL, BL) are connected to a gas-liquid separator (31, 31). Each indoor heat exchanger (22, 22,...) Is connected via a common gas pipe (CG, CG) and a common liquid pipe (CL, CL) in the same manner as in the third embodiment.

【0071】また、上記主ガス管(MG)及び主液管(M
L)には、凝縮器(12)の近傍に暖房運転時に閉鎖し、
冷房運転時に開口する冷房用の電磁弁(SV31,SV32)
が、蒸発器(13)の近傍に冷房運転時に閉鎖し、暖房運
転時に開口する暖房用の電磁弁(SV33,SV34)がそれぞ
れ設けられている。
The main gas pipe (MG) and the main liquid pipe (M
L) closes during heating operation near the condenser (12),
Solenoid valves for cooling that are opened during cooling operation (SV31, SV32)
However, heating electromagnetic valves (SV33, SV34) are provided near the evaporator (13) and closed during the cooling operation and opened during the heating operation.

【0072】したがって、冷房運転時は、暖房用の電磁
弁(SV33,SV34)を閉鎖し、凝縮器(12)と各室内熱交
換器(22,22,…)との間で冷媒を自然循環させる一
方、暖房運転時は、冷房用の電磁弁(SV31,SV32)を閉
鎖し、蒸発器(13)と各室内熱交換器(22,22,…)と
の間で冷媒を自然循環させる。そして、本実施形態4で
は、全室内熱交換器(22,22,…)が冷房運転、又は暖
房運転の何れか一方のみを同時に行うことになり、冷房
運転の室内熱交換器(22,22,…)と暖房運転の室内熱
交換器(22,22,…)とが併存する冷暖同時運転は行わ
れない。
Therefore, during the cooling operation, the heating solenoid valves (SV33, SV34) are closed, and the refrigerant is naturally circulated between the condenser (12) and each indoor heat exchanger (22, 22,...). On the other hand, during the heating operation, the cooling electromagnetic valves (SV31, SV32) are closed, and the refrigerant is naturally circulated between the evaporator (13) and each indoor heat exchanger (22, 22,...). In the fourth embodiment, all the indoor heat exchangers (22, 22,...) Simultaneously perform only one of the cooling operation and the heating operation, and the indoor heat exchangers (22, 22 ,...) And the indoor heat exchangers (22, 22,...) Of the heating operation coexist.

【0073】本実施形態4によれば、1本の主ガス管
(MG)と1本の主液管(ML)とを設けるのみであるの
で、配管系統(30)の簡略化を図ることができると共
に、配管施工の容易化を図ることができる。その他の構
成並びに作用及び効果は実施形態3と同様である。尚、
図4は、概略構成を示し、室内液電磁弁(SV16,SV16,
…)及び室内ガス電磁弁(SV17,SV17,…)などは省略
している。
According to the fourth embodiment, since only one main gas pipe (MG) and one main liquid pipe (ML) are provided, the piping system (30) can be simplified. In addition to this, it is possible to facilitate piping work. Other configurations, operations and effects are the same as those of the third embodiment. still,
FIG. 4 shows a schematic configuration, and the indoor liquid solenoid valves (SV16, SV16,
…) And indoor gas solenoid valves (SV17, SV17, ...) are omitted.

【0074】[0074]

【発明の実施の形態5】本発明の実施形態5は、図5に
示すように、上記実施形態3が気液分離器(31,31)を
設けたのに代えて、この気液分離器(31,31)を省略し
たものである。つまり、冷房分岐ガス管(BG-1,BG-1)
及び冷房分岐液管(BL-1,BL-1)と、暖房分岐ガス管
(BG-2,BG-2)及び暖房分岐液管(BL-2,BL-2)とが、
室内系統(20,20)の共通ガス管(CG,CG)と共通液管
(CL,CL)とに直接に接続されている。
Fifth Embodiment A fifth embodiment of the present invention is different from the third embodiment in that a gas-liquid separator (31, 31) is provided as shown in FIG. (31, 31) is omitted. In other words, cooling branch gas pipes (BG-1, BG-1)
And cooling branch liquid pipes (BL-1, BL-1), heating branch gas pipes (BG-2, BG-2) and heating branch liquid pipes (BL-2, BL-2),
It is directly connected to the common gas pipe (CG, CG) and the common liquid pipe (CL, CL) of the indoor system (20, 20).

【0075】したがって、本実施形態5によれば、冷房
運転時においては、凝縮器(12)で凝縮した冷媒が直接
に室内熱交換器(22,22,…)に流れ、該室内熱交換器
(22,22,…)で蒸発した冷媒が直接に凝縮器(12)に
戻る。また、暖房運転時においては、蒸発器(13)で蒸
発した冷媒が直接に室内熱交換器(22,22,…)に流
れ、該室内熱交換器(22,22,…)で凝縮した冷媒が直
接に蒸発器(13)に戻る。その他の構成並びに作用及び
効果は実施形態3と同様である。
Therefore, according to the fifth embodiment, during the cooling operation, the refrigerant condensed in the condenser (12) flows directly to the indoor heat exchangers (22, 22,...) The refrigerant evaporated at (22, 22,...) Returns directly to the condenser (12). During the heating operation, the refrigerant evaporated in the evaporator (13) directly flows into the indoor heat exchangers (22, 22, ...) and condensed in the indoor heat exchangers (22, 22, ...). Returns directly to the evaporator (13). Other configurations, operations and effects are the same as those of the third embodiment.

【0076】[0076]

【発明の実施の形態6】本発明の実施形態6は、図6に
示すように、上記実施形態4が気液分離器(31,31)を
設けたのに代えて、この気液分離器(31,31)を省略し
たものである。つまり、上記分岐ガス管(BG,BG)と分
岐液管(BL,BL)とが、各室内系統(20,20)の共通ガ
ス管(CG,CG)と共通液管(CL,CL)とに直接に接続さ
れている。
Sixth Embodiment A sixth embodiment of the present invention is different from the fourth embodiment in that a gas-liquid separator (31, 31) is provided as shown in FIG. (31, 31) is omitted. That is, the branch gas pipes (BG, BG) and the branch liquid pipes (BL, BL) are connected to the common gas pipes (CG, CG) and the common liquid pipes (CL, CL) of each indoor system (20, 20). Connected directly to.

【0077】したがって、本実施形態6によれば、上記
実施形態5と同様に、冷房運転時においては、凝縮器
(12)で凝縮した冷媒が直接に室内熱交換器(22,22,
…)に流れ、該室内熱交換器(22,22,…)で蒸発した
冷媒が直接に凝縮器(12)に戻る。また、暖房運転時に
おいては、蒸発器(13)で蒸発した冷媒が直接に室内熱
交換器(22,22,…)に流れ、該室内熱交換器(22,2
2,…)で凝縮した冷媒が直接に蒸発器(13)に戻る。
その他の構成並びに作用及び効果は実施形態4と同様で
ある。
Therefore, according to the sixth embodiment, similarly to the fifth embodiment, during the cooling operation, the refrigerant condensed in the condenser (12) is directly transferred to the indoor heat exchanger (22, 22,
...), and the refrigerant evaporated in the indoor heat exchangers (22, 22, ...) returns directly to the condenser (12). During the heating operation, the refrigerant evaporated in the evaporator (13) flows directly to the indoor heat exchangers (22, 22,.
The refrigerant condensed in (2, ...) returns directly to the evaporator (13).
Other configurations, operations, and effects are the same as those of the fourth embodiment.

【0078】[0078]

【発明の他の実施の形態】本各実施形態においては、2
つの室内系統(20,20)のみを設けたが、本発明は、3
つ以上の室内系統(20,20)を設けてもよいことは勿論
のこと、逆に1つの室内ユニット(21)のみを設けるも
のであってもよい。
Other embodiments of the present invention
Although only two indoor systems (20, 20) were provided, the present invention
Needless to say, one or more indoor systems (20, 20) may be provided, and conversely, only one indoor unit (21) may be provided.

【0079】また、配管系統(30)及び流路切換え手段
(40)は各実施形態に限定されるものではなく、要する
に、冷房運転時に凝縮器(12)と室内熱交換器(22)と
の間で冷媒が自然循環し、暖房運転時に同じ室内熱交換
器(22)と蒸発器(13)との間で冷媒が自然循環すれば
よい。
Further, the piping system (30) and the flow path switching means (40) are not limited to the respective embodiments. In short, the cooling system is operated by the condenser (12) and the indoor heat exchanger (22). It is sufficient that the refrigerant circulates naturally between the indoor heat exchanger (22) and the evaporator (13) during the heating operation.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施形態1を示す空気調和装置の冷媒
回路図である。
FIG. 1 is a refrigerant circuit diagram of an air-conditioning apparatus according to Embodiment 1 of the present invention.

【図2】本発明の実施形態2を示す空気調和装置の冷媒
回路図である。
FIG. 2 is a refrigerant circuit diagram of the air-conditioning apparatus according to Embodiment 2 of the present invention.

【図3】本発明の実施形態3を示す空気調和装置の冷媒
回路図である。
FIG. 3 is a refrigerant circuit diagram of an air-conditioning apparatus according to Embodiment 3 of the present invention.

【図4】本発明の実施形態4を示す空気調和装置の冷媒
回路図である。
FIG. 4 is a refrigerant circuit diagram of an air-conditioning apparatus showing Embodiment 4 of the present invention.

【図5】本発明の実施形態5を示す空気調和装置の冷媒
回路図である。
FIG. 5 is a refrigerant circuit diagram of an air-conditioning apparatus according to Embodiment 5 of the present invention.

【図6】本発明の実施形態6を示す空気調和装置の冷媒
回路図である。
FIG. 6 is a refrigerant circuit diagram of an air-conditioning apparatus showing Embodiment 6 of the present invention.

【符号の説明】[Explanation of symbols]

10 空気調和装置 11 冷媒回路 12 凝縮器 13 蒸発器 20 室内系統 21 室内ユニット(利用側ユニット) 22 室内熱交換器(利用側熱交換器) 30 配管系統 31 気液分離器 MG 主ガス管 ML 主液管 BG 分岐ガス管 BL 分岐液管 CG 共通ガス管 CL 共通液管 RG 室内ガス管 RL 室内液管 40 流路切換え手段 SV11〜SV34 電磁弁 10 Air conditioner 11 Refrigerant circuit 12 Condenser 13 Evaporator 20 Indoor system 21 Indoor unit (use side unit) 22 Indoor heat exchanger (use side heat exchanger) 30 Piping system 31 Gas-liquid separator MG Main gas pipe ML Main Liquid pipe BG Branch gas pipe BL Branch liquid pipe CG Common gas pipe CL Common liquid pipe RG Indoor gas pipe RL Indoor liquid pipe 40 Flow path switching means SV11 to SV34 Solenoid valve

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 高所に配置された凝縮器(12)と、 低所に配置された蒸発器(13)と、 上記凝縮器(12)と蒸発器(13)との中間高さに配置さ
れた利用側熱交換器(22)と、 該利用側熱交換器(22)と凝縮器(12)とを接続すると
共に、該利用側熱交換器(22)と蒸発器(13)とを接続
する配管系統(30)と、 上記利用側熱交換器(22)の冷房運転時に凝縮器(12)
と該利用側熱交換器(22)との間で冷媒が自然循環する
と共に、上記利用側熱交換器(22)の暖房運転時に蒸発
器(13)と該利用側熱交換器(22)との間で冷媒が自然
循環するように配管系統(30)の冷媒の流通方向を切り
換える流路切換え手段(40)とを備えていることを特徴
とする自然循環式空気調和装置。
1. A condenser (12) arranged at a high place, an evaporator (13) arranged at a low place, and arranged at an intermediate height between the condenser (12) and the evaporator (13). The connected use side heat exchanger (22), the use side heat exchanger (22) and the condenser (12) are connected, and the use side heat exchanger (22) and the evaporator (13) are connected. The piping system (30) to be connected and the condenser (12) during the cooling operation of the use side heat exchanger (22)
The refrigerant naturally circulates between the heat exchanger (22) and the use-side heat exchanger (22), and the evaporator (13) and the use-side heat exchanger (22) during the heating operation of the use-side heat exchanger (22). And a flow path switching means (40) for switching the flow direction of the refrigerant in the piping system (30) so that the refrigerant naturally circulates between the natural circulation type air conditioners.
【請求項2】 請求項1記載の自然循環式空気調和装置
において、 凝縮器(12)と蒸発器(13)とは、主ガス管(MG)と主
液管(ML)とによって接続される一方、 該主ガス管(MG)及び主液管(ML)には、主ガス管(M
G)及び主液管(ML)より分岐した分岐ガス管(BG)と
分岐液管(BL)とを介して利用側熱交換器(22)が連通
していることを特徴とする自然循環式空気調和装置。
2. The natural circulation air conditioner according to claim 1, wherein the condenser (12) and the evaporator (13) are connected by a main gas pipe (MG) and a main liquid pipe (ML). On the other hand, the main gas pipe (MG) and the main liquid pipe (ML)
G) and a use-side heat exchanger (22) communicating with a branch gas pipe (BG) branched from the main liquid pipe (ML) and a branch liquid pipe (BL). Air conditioner.
【請求項3】 請求項1記載の自然循環式空気調和装置
において、 凝縮器(12)には、冷房用の主ガス管(MG-1)と主液管
(ML-1)とが接続され、 蒸発器(13)には、暖房用の主ガス管(MG-2)と主液管
(ML-2)とが接続される一方、 該冷房用及び暖房用のと各主液管(ML-1,ML-2)とに
は、各主ガス管(MG-1,MG-2)及び各主液管(ML-1,ML
-2)より分岐した冷房用及び暖房用の各分岐ガス管(BG
-1,BG-2)と各分岐液管(BL-1,BL-2)とを介して利用
側熱交換器(22)が連通していることを特徴とする自然
循環式空気調和装置。
3. The natural circulation air conditioner according to claim 1, wherein the condenser (12) is connected to a main gas pipe (MG-1) for cooling and a main liquid pipe (ML-1). The main gas pipe (MG-2) for heating and the main liquid pipe (ML-2) are connected to the evaporator (13), while the main liquid pipes (ML-2) for cooling and heating are connected. -1, ML-2) means each main gas pipe (MG-1, MG-2) and each main liquid pipe (ML-1, ML
-2) Branch gas pipes for cooling and heating (BG
1, a natural circulation type air conditioner characterized in that a use side heat exchanger (22) communicates with each of the branch liquid pipes (BL-1, BL-2).
【請求項4】 請求項1記載の自然循環式空気調和装置
において、 配管系統(30)には、少なくとも凝縮器(12)で凝縮し
て利用側熱交換器(22)に流れる冷媒及び、蒸発器(1
3)で蒸発して利用側熱交換器(22)に流れる冷媒を、
液冷媒とガス冷媒とに分離する気液分離器(31)が設け
られていることを特徴とする自然循環式空気調和装置。
4. The natural circulation type air conditioner according to claim 1, wherein the piping system (30) has at least a refrigerant condensed in the condenser (12) and flowing to the use side heat exchanger (22), and an evaporator. Bowl (1
The refrigerant that evaporates in 3) and flows to the use-side heat exchanger (22)
A natural circulation air conditioner, comprising a gas-liquid separator (31) for separating liquid refrigerant and gas refrigerant.
JP7155197A 1997-03-25 1997-03-25 Natural circulating type air conditioner Pending JPH10267322A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7155197A JPH10267322A (en) 1997-03-25 1997-03-25 Natural circulating type air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7155197A JPH10267322A (en) 1997-03-25 1997-03-25 Natural circulating type air conditioner

Publications (1)

Publication Number Publication Date
JPH10267322A true JPH10267322A (en) 1998-10-09

Family

ID=13463994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7155197A Pending JPH10267322A (en) 1997-03-25 1997-03-25 Natural circulating type air conditioner

Country Status (1)

Country Link
JP (1) JPH10267322A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009222331A (en) * 2008-03-18 2009-10-01 Hitachi Plant Technologies Ltd Air conditioning system and its operating method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009222331A (en) * 2008-03-18 2009-10-01 Hitachi Plant Technologies Ltd Air conditioning system and its operating method

Similar Documents

Publication Publication Date Title
US6918264B2 (en) Multi-type air conditioner
EP1391660A1 (en) Multi-unit air conditioner and method for controlling operation of outdoor unit fan thereof
JP2004085179A (en) Multi-air conditioner and operation control method of outdoor fan
JP4828789B2 (en) Multi air conditioner
JP2005133976A (en) Air-conditioner
JP2997504B2 (en) Air conditioner
JP3324420B2 (en) Refrigeration equipment
JP2004108715A (en) Air conditioner for many rooms
JPH10267322A (en) Natural circulating type air conditioner
JPH11142015A (en) Engine-driven type refrigerating unit
JP2998740B2 (en) Air conditioner
JP3511161B2 (en) Air conditioner
JP4020705B2 (en) Heat pump and dehumidifying air conditioner
JPH0719665A (en) Air conditioner for vehicle
JPH10325641A (en) Refrigerating device
JP2998739B2 (en) Air conditioner
JPH1089803A (en) Air conditioner
JPH0615275Y2 (en) Air-conditioning heat source device
JPH05332638A (en) Air conditioner
JPH10141815A (en) Air conditioner
JP2022052743A (en) Multi-air conditioner for heating, cooling and ventilation
JPS5815822Y2 (en) air conditioner
JP2662126B2 (en) Air conditioner
JPH08105668A (en) Air conditioner
JPH025323Y2 (en)

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20040316

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20050512

A131 Notification of reasons for refusal

Effective date: 20050517

Free format text: JAPANESE INTERMEDIATE CODE: A131

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20050920