JPH06257902A - Multiple room type air conditioning apparatus - Google Patents
Multiple room type air conditioning apparatusInfo
- Publication number
- JPH06257902A JPH06257902A JP5039599A JP3959993A JPH06257902A JP H06257902 A JPH06257902 A JP H06257902A JP 5039599 A JP5039599 A JP 5039599A JP 3959993 A JP3959993 A JP 3959993A JP H06257902 A JPH06257902 A JP H06257902A
- Authority
- JP
- Japan
- Prior art keywords
- outdoor
- way valve
- heat exchanger
- compressor
- indoor
- 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)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は多室型空気調和機に係わ
り、特に室外熱交換器の制御に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-room air conditioner, and more particularly to control of an outdoor heat exchanger.
【０００２】[0002]
【従来の技術】従来、この種の多室型空気調和機とし
て、例えば、特開平４−１１０５７６号公報に掲載され
たものがある。2. Description of the Related Art Conventionally, as a multi-room type air conditioner of this type, for example, there is one disclosed in Japanese Patent Laid-Open No. 4-110576.
【０００３】以下、図面を参照しながら上述した公報の
従来の多室型空気調和機について説明する。The conventional multi-room air conditioner of the above-mentioned publication will be described below with reference to the drawings.
【０００４】図７において、１は多室型空気調和機の室
外機であり、圧縮機２、四方弁３、第１の室外側熱交換
器４、第２の室外側熱交換器５、第１の室外側二方弁
６、第２の室外側二方弁７、第３の室外側二方弁８、第
４の室外側二方弁９、室外側膨張弁１０、吐出ガス管１
１から成っている。１２は室内機であり、室内側膨張弁
１３、室内側熱交換器１４から成っている。In FIG. 7, reference numeral 1 denotes an outdoor unit of a multi-room air conditioner, which includes a compressor 2, a four-way valve 3, a first outdoor heat exchanger 4, a second outdoor heat exchanger 5, and a second outdoor heat exchanger 5. 1 outdoor side 2 way valve 6, 2nd outdoor side 2 way valve 7, 3rd outdoor side 2 way valve 4, 4th outdoor side 2 way valve 9, outdoor side expansion valve 10, discharge gas pipe 1
Made of one. An indoor unit 12 includes an indoor expansion valve 13 and an indoor heat exchanger 14.
【０００５】そして室外機１と室内機１２は液管１５及
びガス管１６によって環状に接続され、冷媒回路１７を
構成している。四方弁３の第１路は圧縮機２の吐出側
に、四方弁３の第２路は圧縮機２の吸入側に、四方弁３
の第３路はガス管１６に連通し、第１、第２の室外側熱
交換器４、５の一方は、四方弁３の第４路に連通し、第
１、第２の室外側熱交換器４、５の他の一方は、それぞ
れ第１、第２の室外側二方弁６、７を介して合流し、室
外側膨張弁１０を介して液管１５に接続し、第１の室外
側熱交換器４と第１の室外側二方弁６の間の配管及び第
２の室外側熱交換器５と第２の室外側二方弁７の間の配
管をそれぞれ第３、第４の室外側二方弁６、７を介して
圧縮機２の吐出側に接続している。The outdoor unit 1 and the indoor unit 12 are annularly connected by a liquid pipe 15 and a gas pipe 16 to form a refrigerant circuit 17. The first path of the four-way valve 3 is on the discharge side of the compressor 2, the second path of the four-way valve 3 is on the suction side of the compressor 2, and the four-way valve 3
Of the first and second outdoor heat exchangers 4 and 5 communicate with the fourth passage of the four-way valve 3, and the first and second outdoor heat exchangers are connected to the gas pipe 16. The other one of the exchangers 4 and 5 joins via the first and second outdoor two-way valves 6 and 7, respectively, and is connected to the liquid pipe 15 via the outdoor expansion valve 10, The piping between the outdoor heat exchanger 4 and the first outdoor two-way valve 6 and the piping between the second outdoor heat exchanger 5 and the second outdoor two-way valve 7 are respectively the third and the third. 4 is connected to the discharge side of the compressor 2 via the outdoor two-way valves 6 and 7.
【０００６】室内側熱交換器１４の一方は、ガス管１６
に、室内側熱交換器１４の他の一方は、室内側膨張弁１
３を介し液管１５に接続している。尚、室内機１２は本
従来例では３台接続されており、区別する場合は添字
ａ、ｂ、ｃを付けることにする。One of the indoor heat exchangers 14 has a gas pipe 16
The other side of the indoor heat exchanger 14 is connected to the indoor expansion valve 1
It is connected to the liquid pipe 15 via 3. It should be noted that three indoor units 12 are connected in this conventional example, and the subscripts a, b, and c are added to distinguish them.
【０００７】次に上記構成の多室型空気調和機の動作に
ついて説明する。まず冷房運転の場合について説明す
る。この場合の冷媒の流れは実線矢印で表し、第１の室
外側二方弁６は開、第２の室外側二方弁７は開、第３の
室外側二方弁８は閉、第４の室外側二方弁９は閉、各室
内側膨張弁１３ａ，１３ｂ，１３ｃは各室内負荷に応じ
た開度である。圧縮機２より吐出された高温高圧ガス
は、四方弁３を介して第１の室外側熱交換器４、第２の
室外側熱交換器５で凝縮液化され、第１の室外側二方弁
６、第２の室外側二方弁７を通り、室外側膨張弁１０を
介して各室内側膨張弁１３ａ，１３ｂ，１３ｃで減圧さ
れ、各室内側熱交換器１４ａ，１４ｂ，１４ｃに入りそ
れぞれ蒸発気化したあと、四方弁３を介して圧縮機２に
戻り、冷房運転を行なう。Next, the operation of the multi-room air conditioner having the above structure will be described. First, the case of the cooling operation will be described. The flow of the refrigerant in this case is indicated by a solid arrow, the first outdoor two-way valve 6 is open, the second outdoor two-way valve 7 is open, the third outdoor two-way valve 8 is closed, and the fourth outdoor four-way valve is closed. The outdoor two-way valve 9 is closed, and each indoor expansion valve 13a, 13b, 13c has an opening degree corresponding to each indoor load. The high-temperature high-pressure gas discharged from the compressor 2 is condensed and liquefied by the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 via the four-way valve 3, and the first outdoor two-way valve. 6, passing through the second outdoor two-way valve 7, through the outdoor expansion valve 10 is decompressed by the indoor expansion valves 13a, 13b, 13c, and enters the indoor heat exchangers 14a, 14b, 14c, respectively. After evaporating and vaporizing, it returns to the compressor 2 through the four-way valve 3 to perform the cooling operation.
【０００８】次に暖房運転の場合について説明する。こ
の場合の冷媒の流れは破線矢印で表し、第１の室外側二
方弁６は開、第２の室外側二方弁７は開、第３の室外側
二方弁８は閉、第４の室外側二方弁９は閉、各室内側膨
張弁１３ａ，１３ｂ，１３ｃは各室内負荷に応じた開度
である。圧縮機２より吐出された高温高圧ガスは、四方
弁３を介して各室内側熱交換器１４ａ，１４ｂ，１４ｃ
に導かれ、ここで凝縮液化して各室内側膨張弁１３ａ，
１３ｂ，１３ｃを介して室外側膨張弁１０で減圧され、
第１の室外側二方弁６、第２の室外側二方弁７を通り、
第１の室外側熱交換器４、第２の室外側熱交換器５に入
り蒸発気化したあと、四方弁３を介して圧縮機２に戻
り、暖房運転を行なう。Next, the case of heating operation will be described. The flow of the refrigerant in this case is represented by a dashed arrow, the first outdoor two-way valve 6 is open, the second outdoor two-way valve 7 is open, the third outdoor two-way valve 8 is closed, and the fourth outdoor four-way valve is closed. The outdoor two-way valve 9 is closed, and each indoor expansion valve 13a, 13b, 13c has an opening degree corresponding to each indoor load. The high-temperature high-pressure gas discharged from the compressor 2 is passed through the four-way valve 3 to each indoor heat exchanger 14a, 14b, 14c.
To the interior of each indoor expansion valve 13a,
The pressure is reduced by the outdoor expansion valve 10 via 13b and 13c,
Passing through the first outdoor two-way valve 6 and the second outdoor two-way valve 7,
After entering the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 to evaporate and vaporize, the air is returned to the compressor 2 via the four-way valve 3 to perform the heating operation.
【０００９】次に除霜運転の場合について図８を用いて
説明する。まず、第１の室外側熱交換器４のみ除霜する
場合について説明する。この場合の冷媒の流れは実線矢
印で表し、第１の室外側二方弁６は閉、第２の室外側二
方弁７は開、第３の室外側二方弁８は開、第４の室外側
二方弁９は閉、各室内側膨張弁１３ａ，１３ｂ，１３ｃ
は各室内負荷に応じた開度である。圧縮機２より吐出さ
れた高温高圧ガスの一部は、四方弁３を介して各室内側
熱交換器１４ａ，１４ｂ，１４ｃに導かれ、ここで凝縮
液化して各室内側膨張弁１３ａ，１３ｂ，１３ｃを介し
て室外側膨張弁１０で減圧され、第２の室外側二方弁７
を通り、第２の室外側熱交換器５に入り蒸発気化する。
圧縮機２より吐出された高温高圧ガスの残りは、吐出ガ
ス管１１、第３の室外側二方弁８を通り、第１の室外側
熱交換器４で凝縮する（第１の室外側熱交換器４は除霜
される）。そのあと、第２の室外側熱交換器５を通った
冷媒と合流し、四方弁３を介して圧縮機２に戻り、除霜
運転を行なう。Next, the case of the defrosting operation will be described with reference to FIG. First, a case where only the first outdoor heat exchanger 4 is defrosted will be described. The flow of the refrigerant in this case is indicated by a solid arrow, the first outdoor two-way valve 6 is closed, the second outdoor two-way valve 7 is open, the third outdoor two-way valve 8 is open, and the fourth outdoor four-way valve is open. The outdoor two-way valve 9 is closed, and the indoor expansion valves 13a, 13b, 13c are closed.
Is an opening degree according to each indoor load. A part of the high-temperature high-pressure gas discharged from the compressor 2 is guided to the indoor heat exchangers 14a, 14b, 14c via the four-way valve 3, where it is condensed and liquefied to the indoor expansion valves 13a, 13b. , 13c, the pressure is reduced by the outdoor expansion valve 10, and the second outdoor two-way valve 7
And enters the second outdoor heat exchanger 5 and evaporates and vaporizes.
The rest of the high-temperature high-pressure gas discharged from the compressor 2 passes through the discharge gas pipe 11 and the third outdoor two-way valve 8 and is condensed in the first outdoor heat exchanger 4 (first outdoor heat The exchanger 4 is defrosted). After that, it merges with the refrigerant that has passed through the second outdoor heat exchanger 5, returns to the compressor 2 via the four-way valve 3, and performs the defrosting operation.
【００１０】次に、第２の室外側熱交換器５のみ除霜す
る場合について説明する。この場合の冷媒の流れは破線
矢印で表し、第１の室外側二方弁６は開、第２の室外側
二方弁７は閉、第３の室外側二方弁８は閉、第４の室外
側二方弁９は開、各室内側膨張弁１３ａ，１３ｂ，１３
ｃは各室内負荷に応じた開度である。圧縮機２より吐出
された高温高圧ガスの一部は、四方弁３を介して各室内
側熱交換器１４ａ，１４ｂ，１４ｃに導かれ、ここで凝
縮液化して各室内側膨張弁１３ａ，１３ｂ，１３ｃを介
して室外側膨張弁１０で減圧され、第１の室外側二方弁
６を通り、第１の室外側熱交換器４に入り蒸発気化す
る。圧縮機２より吐出された高温高圧ガスの残りは、吐
出ガス管１１、第４の室外側二方弁９を通り、第２の室
外側熱交換器５で凝縮する（第２の室外側熱交換器５は
除霜される）。そのあと、第１の室外側熱交換器４を通
った冷媒と合流し、四方弁３を介して圧縮機２に戻り、
除霜運転を行なう。Next, a case where only the second outdoor heat exchanger 5 is defrosted will be described. The flow of the refrigerant in this case is indicated by a broken line arrow, the first outdoor two-way valve 6 is open, the second outdoor two-way valve 7 is closed, the third outdoor two-way valve 8 is closed, and the fourth outdoor four-way valve is closed. The outdoor two-way valve 9 is open, and each indoor expansion valve 13a, 13b, 13
c is the opening degree according to each indoor load. A part of the high-temperature high-pressure gas discharged from the compressor 2 is guided to the indoor heat exchangers 14a, 14b, 14c via the four-way valve 3, where it is condensed and liquefied to the indoor expansion valves 13a, 13b. , 13c, the pressure is reduced by the outdoor expansion valve 10, passes through the first outdoor two-way valve 6, enters the first outdoor heat exchanger 4, and is evaporated and vaporized. The rest of the high-temperature high-pressure gas discharged from the compressor 2 passes through the discharge gas pipe 11 and the fourth outdoor two-way valve 9, and is condensed in the second outdoor heat exchanger 5 (second outdoor heat). The exchanger 5 is defrosted). After that, it merges with the refrigerant that has passed through the first outdoor heat exchanger 4, and returns to the compressor 2 via the four-way valve 3,
Perform defrosting operation.
【００１１】従って、このように室外側熱交換器の除霜
が必要な場合、暖房運転を行いながら第１の室外側熱交
換器４または第２の室外側熱交換器５を交互に除霜を行
うことができる。Therefore, when it is necessary to defrost the outdoor heat exchanger in this manner, the first outdoor heat exchanger 4 or the second outdoor heat exchanger 5 is alternately defrosted while performing the heating operation. It can be performed.
【００１２】[0012]
【発明が解決しようとする課題】しかしながら上記のよ
うな構成では、冷房小容量運転（例えば２９．１ｋＷの
室外機に対して２．３ｋＷの室内機運転）の場合、圧縮
機の最小能力（５．８ｋＷ相当）に比べ凝縮能力は１
４．０５ｋＷと大きいため、凝縮圧力が低下し、蒸発能
力は２．３ｋＷと小さく蒸発圧力が低下する。暖房小容
量運転（例えば２９．１ｋＷの室外機に対して２．３ｋ
Ｗの室内機運転）の場合、圧縮機の最小能力（５．８ｋ
Ｗ相当）に比べ凝縮能力は２．３ｋＷと小さく凝縮圧力
が上昇し、蒸発能力は１４．０５ｋＷと大きいため、蒸
発圧力が上昇する。そのため、圧縮機の信頼性の低下を
招くと共に、安定なシステムの運転を確保できないとい
う課題を有していた。However, in the above configuration, in the case of the cooling small capacity operation (for example, the indoor unit operation of 2.3 kW with respect to the outdoor unit of 29.1 kW), the minimum capacity of the compressor (5 1.8 kW equivalent) has a condensation capacity of 1
Since it is as large as 4.05 kW, the condensing pressure is lowered, and the evaporation capacity is as small as 2.3 kW, and the evaporation pressure is lowered. Small heating capacity operation (eg 2.3k for 29.1kW outdoor unit)
In the case of W indoor unit operation), the minimum capacity of the compressor (5.8k)
(Equivalent to W), the condensing capacity is as small as 2.3 kW and the condensing pressure rises, and the evaporation capacity is as large as 14.05 kW, so the evaporating pressure rises. Therefore, there are problems that the reliability of the compressor is deteriorated and stable operation of the system cannot be ensured.
【００１３】本発明は上記課題に鑑みなされたもので、
安価な仕様で室内機の運転状態に応じて蒸発能力、凝縮
能力を制御し、圧縮機の信頼性及び安定なシステムの運
転状態を確保できるとともに室外熱交換器の除霜中に暖
房運転可能な多室型空気調和機を提供するものである。The present invention has been made in view of the above problems,
Inexpensive specifications can control the evaporation capacity and condensation capacity according to the operating condition of the indoor unit to ensure the reliability of the compressor and the stable operating condition of the system, and the heating operation can be performed during defrosting of the outdoor heat exchanger. A multi-room air conditioner is provided.
【００１４】[0014]
【課題を解決するための手段】上記課題を解決するため
に本発明は、圧縮機、四方弁、第１の室外側熱交換器、
第２の室外側熱交換器、第１の室外側膨張弁、第２の室
外側膨張弁、第１の室外側二方弁、第２の室外側二方
弁、第３の室外側二方弁、第４の室外側二方弁、第５の
室外側二方弁から成る室外機と、室内側膨張弁、室内側
熱交換器から成る複数の室内機とをガス管及び液管を介
して接続し、前記四方弁の第１路は前記圧縮機の吐出側
に、前記四方弁の第２路は前記圧縮機の吸入側に、前記
四方弁の第３路は前記第１の室外側二方弁を介し前記ガ
ス管に連通すると共に、前記圧縮機の吐出側は前記第２
の室外側二方弁を介し前記ガス管に連通し、前記第１の
室外側熱交換器の一方は、前記第３の室外側二方弁を介
して前記四方弁の第４路に連通し、前記第１の室外側熱
交換器と前記第３の室外側二方弁の間の配管を、前記第
４の室外側二方弁を介して前記圧縮機の吐出側と、前記
第５の室外側二方弁を介して前記圧縮機の吸入側と接続
し、前記第２の室外側熱交換器の一方は、前記四方弁の
第４路に連通し、前記第１、第２の室外側熱交換器の他
の一方は、それぞれ前記第１、第２の室外側膨張弁を介
し、前記液管に合流接続し、前記室内側熱交換器の一方
は、前記ガス管に、前記室内側熱交換器の他の一方は、
前記室内側膨張弁を介し前記液管に接続したものであ
る。In order to solve the above problems, the present invention provides a compressor, a four-way valve, a first outdoor heat exchanger,
Second outdoor heat exchanger, first outdoor expansion valve, second outdoor expansion valve, first outdoor two-way valve, second outdoor two-way valve, third outdoor two-way Valve, a fourth outdoor two-way valve, an outdoor unit consisting of a fifth outdoor two-way valve, and a plurality of indoor units consisting of an indoor expansion valve, an indoor heat exchanger through a gas pipe and a liquid pipe The first passage of the four-way valve is on the discharge side of the compressor, the second passage of the four-way valve is on the suction side of the compressor, and the third passage of the four-way valve is on the first outdoor side. The discharge side of the compressor is connected to the second pipe while communicating with the gas pipe via a two-way valve.
Communicating with the gas pipe via the outdoor two-way valve, and one of the first outdoor heat exchangers communicates with the fourth passage of the four-way valve via the third outdoor two-way valve. A pipe between the first outdoor heat exchanger and the third outdoor two-way valve is connected to the discharge side of the compressor via the fourth outdoor two-way valve and the fifth outdoor pipe. It is connected to the suction side of the compressor via an outdoor two-way valve, and one of the second outdoor heat exchangers communicates with the fourth passage of the four-way valve, and the first and second chambers are connected. The other one of the outer heat exchangers is connected to the liquid pipe through the first and second outdoor expansion valves, respectively, and one of the indoor heat exchangers is connected to the gas pipe and the chamber. The other side of the inner heat exchanger is
It is connected to the liquid pipe via the indoor expansion valve.
【００１５】また、他の本発明は、圧縮機、四方弁、第
１の室外側熱交換器、第２の室外側熱交換器、第１の室
外側膨張弁、第２の室外側膨張弁、第１の室外側二方
弁、第２の室外側二方弁、第３の室外側二方弁、第４の
室外側二方弁から成る室外機と、室内側膨張弁、室内側
熱交換器から成る複数の室内機とをガス管及び液管を介
して接続し、前記四方弁の第１路は前記圧縮機の吐出側
に、前記四方弁の第２路は前記圧縮機の吸入側に、前記
四方弁の第３路は前記第１の室外側二方弁を介し前記ガ
ス管に連通すると共に、前記圧縮機の吐出側は前記第２
の室外側二方弁を介し前記ガス管に連通し、前記第１の
室外側熱交換器の一方は、前記第３の室外側二方弁を介
して前記四方弁の第４路に連通し、前記第１の室外側熱
交換器と前記第３の室外側二方弁の間の配管を、前記第
４の室外側二方弁を介して前記四方弁の第３路と前記第
１の室外側二方弁の間の配管と接続し、前記第２の室外
側熱交換器の一方は、前記四方弁の第４路に連通し、前
記第１、第２の室外側熱交換器の他の一方は、それぞれ
前記第１、第２の室外側膨張弁を介し、前記液管に合流
接続し、前記室内側熱交換器の一方は、前記ガス管に、
前記室内側熱交換器の他の一方は、前記室内側膨張弁を
介し前記液管に接続したものである。Another aspect of the present invention is to provide a compressor, a four-way valve, a first outdoor heat exchanger, a second outdoor heat exchanger, a first outdoor expansion valve, and a second outdoor expansion valve. An outdoor unit consisting of a first outdoor two-way valve, a second outdoor two-way valve, a third outdoor two-way valve, and a fourth outdoor two-way valve, an indoor expansion valve, an indoor heat A plurality of indoor units consisting of exchangers are connected via gas pipes and liquid pipes, the first path of the four-way valve is on the discharge side of the compressor, and the second path of the four-way valve is on the suction side of the compressor. Side, the third passage of the four-way valve communicates with the gas pipe through the first outdoor two-way valve, and the discharge side of the compressor is the second side.
Communicating with the gas pipe via the outdoor two-way valve, and one of the first outdoor heat exchangers communicates with the fourth passage of the four-way valve via the third outdoor two-way valve. A pipe between the first outdoor heat exchanger and the third outdoor two-way valve is connected to the third passage of the four-way valve and the first passage via the fourth outdoor two-way valve. One of the second outdoor heat exchangers is connected to the pipe between the outdoor two-way valves, and one of the second outdoor heat exchangers communicates with the fourth passage of the four-way valve to connect the first and second outdoor heat exchangers. The other one is joined and connected to the liquid pipe through the first and second outdoor expansion valves, respectively, and one of the indoor heat exchangers is connected to the gas pipe,
The other one of the indoor heat exchangers is connected to the liquid pipe via the indoor expansion valve.
【００１６】[0016]
【作用】本発明の多室型空気調和機は上記した構成によ
って、冷房、暖房小容量運転時に室外熱交換器の一方を
凝縮器に、室外熱交換器の他の一方を蒸発器として作用
させ、圧縮機能力、蒸発器能力、凝縮器能力をバランス
させるものである。また、室外熱交換器の除霜中に暖房
運転を可能とさせるものである。In the multi-room air conditioner of the present invention, one of the outdoor heat exchangers acts as a condenser and the other outdoor heat exchanger acts as an evaporator during the cooling and heating small capacity operation by the above-mentioned configuration. It balances compression capability, evaporator capacity and condenser capacity. In addition, the heating operation can be performed during defrosting of the outdoor heat exchanger.
【００１７】[0017]
【実施例】以下本発明の多室型空気調和機の第１の実施
例について図面を参照しながら説明する。尚、従来と同
一部分については同一符号を付しその詳細な説明を省略
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a multi-room air conditioner of the present invention will be described below with reference to the drawings. The same parts as those of the prior art will be designated by the same reference numerals, and detailed description thereof will be omitted.
【００１８】図１において、１８は多室型空気調和機の
室外機であり、第１の室外側膨張弁１９、第２の室外側
膨張弁２０、第１の室外側二方弁２１、第２の室外側二
方弁２２、第３の室外側二方弁２３、第４の室外側二方
弁２４、第５の室外側二方弁２５を有している。In FIG. 1, reference numeral 18 denotes an outdoor unit of a multi-room air conditioner, which includes a first outdoor expansion valve 19, a second outdoor expansion valve 20, a first outdoor two-way valve 21, and a second outdoor expansion valve 21. The second outdoor side two-way valve 22, the third outdoor side two-way valve 23, the fourth outdoor side two-way valve 24, and the fifth outdoor side two-way valve 25 are provided.
【００１９】四方弁３の第１路は圧縮機２の吐出側に、
四方弁３の第２路は圧縮機２の吸入側に、四方弁３の第
３路は第１の室外側二方弁２１を介しガス管１６に連通
すると共に、圧縮機２の吐出側は第２の室外側二方弁２
２を介しガス管１６に連通し、第１の室外側熱交換器４
の一方は、第３の室外側二方弁２３を介して四方弁３の
第４路に連通し、第１の室外側熱交換器４と第３の室外
側二方弁２３の間の配管を、第４の室外側二方弁２４を
介して圧縮機２の吐出側と、第５の室外側二方弁２５を
介して圧縮機２の吸入側と接続し、第２の室外側熱交換
器５の一方は、四方弁２の第４路に連通し、第１、第２
の室外側熱交換器４、５の他の一方は、それぞれ第１、
第２の室外側膨張弁１９、２０を介し、液管１５に合流
接続している。The first passage of the four-way valve 3 is on the discharge side of the compressor 2,
The second path of the four-way valve 3 communicates with the suction side of the compressor 2, the third path of the four-way valve 3 communicates with the gas pipe 16 via the first outdoor two-way valve 21, and the discharge side of the compressor 2 Second outdoor two-way valve 2
2 is connected to the gas pipe 16 via the first outdoor heat exchanger 4
One of them is connected to the fourth passage of the four-way valve 3 via the third outdoor two-way valve 23, and the pipe between the first outdoor heat exchanger 4 and the third outdoor two-way valve 23 is connected. Is connected to the discharge side of the compressor 2 via the fourth outdoor two-way valve 24 and to the suction side of the compressor 2 via the fifth outdoor two-way valve 25. One side of the exchanger 5 communicates with the fourth passage of the four-way valve 2, and the first and second
The other one of the outdoor heat exchangers 4 and 5 is
It is connected to the liquid pipe 15 through the second outdoor expansion valves 19 and 20.
【００２０】次に、このような構成においての動作につ
いて説明する。まず冷房運転の場合について説明する。
この場合の冷媒の流れは実線矢印で表し、第１の室外側
二方弁２１は開、第２の室外側二方弁２２は閉、第３の
室外側二方弁２３は開、第４の室外側二方弁２４は閉、
第５の室外側二方弁２５は閉、各室内側膨張弁１３ａ，
１３ｂ，１３ｃは各室内負荷に応じた開度である。圧縮
機２より吐出された高温高圧ガスは、四方弁３を介して
第１の室外側熱交換器４、第２の室外側熱交換器５で凝
縮液化され、第１の室外側膨張弁１９、第２の室外側膨
張弁２０を通り、各室内側膨張弁１３ａ，１３ｂ，１３
ｃで減圧され、各室内側熱交換器１４ａ，１４ｂ，１４
ｃに入りそれぞれ蒸発気化したあと、四方弁３を介して
圧縮機２に戻り、冷房運転を行なう。Next, the operation in such a configuration will be described. First, the case of the cooling operation will be described.
The flow of the refrigerant in this case is represented by a solid line arrow, the first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, the third outdoor two-way valve 23 is open, and the fourth outdoor four-way valve 23 is open. The outdoor two-way valve 24 of
The fifth outdoor two-way valve 25 is closed, each indoor expansion valve 13a,
13b and 13c are opening degrees according to each indoor load. The high-temperature high-pressure gas discharged from the compressor 2 is condensed and liquefied by the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 via the four-way valve 3, and the first outdoor expansion valve 19 , Through the second outdoor expansion valve 20 and through each indoor expansion valve 13a, 13b, 13
It is decompressed at c and each indoor heat exchanger 14a, 14b, 14
After entering c and evaporating, the air is returned to the compressor 2 via the four-way valve 3 and the cooling operation is performed.
【００２１】次に暖房運転の場合について説明する。こ
の場合の冷媒の流れは破線矢印で表し、第１の室外側二
方弁２１は開、第２の室外側二方弁２２は閉、第３の室
外側二方弁２３は開、第４の室外側二方弁２４は閉、第
５の室外側二方弁２５は閉、各室内側膨張弁１３ａ，１
３ｂ，１３ｃは各室内負荷に応じた開度である。圧縮機
２より吐出された高温高圧ガスは、四方弁３を介して各
室内側熱交換器１４ａ，１４ｂ，１４ｃに導かれ、ここ
で凝縮液化して各室内側膨張弁１３ａ，１３ｂ，１３ｃ
を介して第１の室外側膨張弁１９、第２の室外側膨張弁
２０で減圧され、第１の室外側熱交換器４、第２の室外
側熱交換器５に入り蒸発気化したあと、四方弁３を介し
て圧縮機２に戻り、暖房運転を行なう。Next, the case of heating operation will be described. The flow of the refrigerant in this case is represented by a dashed arrow, the first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, the third outdoor two-way valve 23 is open, and the fourth outdoor four-way valve 23 is open. The outdoor two-way valve 24 is closed, the fifth outdoor two-way valve 25 is closed, and each indoor expansion valve 13a, 1
3b and 13c are opening degrees according to the respective indoor loads. The high-temperature high-pressure gas discharged from the compressor 2 is guided to the indoor heat exchangers 14a, 14b, 14c via the four-way valve 3, where it is condensed and liquefied to the indoor expansion valves 13a, 13b, 13c.
After being decompressed by the first outdoor expansion valve 19 and the second outdoor expansion valve 20 through the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 to evaporate and vaporize, Returning to the compressor 2 via the four-way valve 3, the heating operation is performed.
【００２２】次に除霜運転の場合について図２を用いて
説明する。まず、第１の室外側熱交換器４のみ除霜する
場合について説明する。この場合の冷媒の流れは実線矢
印で表し、第１の室外側二方弁２１は開、第２の室外側
二方弁２２は閉、第３の室外側二方弁２３は閉、第４の
室外側二方弁２４は開、第５の室外側二方弁２５は閉、
各室内側膨張弁１３ａ，１３ｂ，１３ｃは各室内負荷に
応じた開度である。圧縮機２より吐出された高温高圧ガ
スの一部は、四方弁３、第１の室外側二方弁２１を介し
て各室内側熱交換器１４ａ，１４ｂ，１４ｃに導かれ、
ここで凝縮液化して各室内側膨張弁１３ａ，１３ｂ，１
３ｃを介して液管１５に流入する。圧縮機２より吐出さ
れた高温高圧ガスの残りは、第４の室外側二方弁２４を
通り、第１の室外側熱交換器４で凝縮し（第１の室外側
熱交換器４は除霜される）、第１の室外側膨張弁１９を
介して液管１５に流入する。そして、室内側熱交換器１
４ａ，１４ｂ，１４ｃを通った冷媒と合流し、第２の室
外側膨張弁２０で減圧され、第２の室外側熱交換器５に
入り蒸発気化し、四方弁３を介して圧縮機２に戻り、除
霜運転を行なう。Next, the case of defrosting operation will be described with reference to FIG. First, a case where only the first outdoor heat exchanger 4 is defrosted will be described. The flow of the refrigerant in this case is represented by a solid line arrow, the first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, the third outdoor two-way valve 23 is closed, and the fourth outdoor four-way valve 23 is closed. The outdoor two-way valve 24 is open, the fifth outdoor two-way valve 25 is closed,
Each indoor expansion valve 13a, 13b, 13c has an opening according to each indoor load. A part of the high-temperature high-pressure gas discharged from the compressor 2 is introduced to each indoor heat exchanger 14a, 14b, 14c via the four-way valve 3 and the first outdoor two-way valve 21,
Here, the indoor expansion valves 13a, 13b, 1 are condensed and liquefied.
It flows into the liquid pipe 15 via 3c. The rest of the high-temperature high-pressure gas discharged from the compressor 2 passes through the fourth outdoor two-way valve 24 and is condensed in the first outdoor heat exchanger 4 (the first outdoor heat exchanger 4 is removed). Frosted), and then flows into the liquid pipe 15 via the first outdoor expansion valve 19. And the indoor heat exchanger 1
4a, 14b, 14c merges with the refrigerant, is decompressed by the second outdoor expansion valve 20, enters the second outdoor heat exchanger 5, evaporates and vaporizes, and enters the compressor 2 via the four-way valve 3. Return and perform defrosting operation.
【００２３】次に、第２の室外側熱交換器５のみ除霜す
る場合について説明する。この場合の冷媒の流れは破線
矢印で表し、第１の室外側二方弁２１は閉、第２の室外
側二方弁２２は開、第３の室外側二方弁２３は閉、第４
の室外側二方弁２４は閉、第５の室外側二方弁２５は
開、各室内側膨張弁１３ａ，１３ｂ，１３ｃは各室内負
荷に応じた開度である。圧縮機２より吐出された高温高
圧ガスの一部は、第２の室外側二方弁２２を介して各室
内側熱交換器１４ａ，１４ｂ，１４ｃに導かれ、ここで
凝縮液化して各室内側膨張弁１３ａ，１３ｂ，１３ｃを
介して液管１５に流入する。圧縮機２より吐出された高
温高圧ガスの残りは、四方弁３を介して第２の室外側熱
交換器５で凝縮し（第２の室外側熱交換器５は除霜され
る）、第２の室外側膨張弁２０を介して液管１５に流入
する。そして、室内側熱交換器１４ａ，１４ｂ，１４ｃ
を通った冷媒と合流し、第１の室外側膨張弁１９で減圧
され、第１の室外側熱交換器４に入り蒸発気化し、第５
の室外側二方弁２５を通り、圧縮機２に戻り、除霜運転
を行なう。Next, a case where only the second outdoor heat exchanger 5 is defrosted will be described. The flow of the refrigerant in this case is represented by a dashed arrow, the first outdoor two-way valve 21 is closed, the second outdoor two-way valve 22 is open, the third outdoor two-way valve 23 is closed, and the fourth outdoor four-way valve 23 is closed.
The outdoor two-way valve 24 is closed, the fifth outdoor two-way valve 25 is open, and each indoor expansion valve 13a, 13b, 13c has an opening degree corresponding to each indoor load. A part of the high-temperature high-pressure gas discharged from the compressor 2 is guided to the indoor heat exchangers 14a, 14b, 14c via the second outdoor two-way valve 22, where it is condensed and liquefied. It flows into the liquid pipe 15 via the inner expansion valves 13a, 13b, 13c. The rest of the high-temperature high-pressure gas discharged from the compressor 2 is condensed in the second outdoor heat exchanger 5 via the four-way valve 3 (the second outdoor heat exchanger 5 is defrosted), and It flows into the liquid pipe 15 via the second outdoor expansion valve 20. Then, the indoor heat exchangers 14a, 14b, 14c
The refrigerant that has passed through the first outdoor expansion valve 19 is decompressed, enters the first outdoor heat exchanger 4, and is evaporated and vaporized.
After passing through the outdoor two-way valve 25, it returns to the compressor 2 to perform the defrosting operation.
【００２４】従って、このように室外側熱交換器の除霜
が必要な場合、暖房運転を行いながら第１の室外側熱交
換器４または第２の室外側熱交換器５を交互に除霜を行
うことができる。Therefore, when it is necessary to defrost the outdoor heat exchanger in this way, the first outdoor heat exchanger 4 or the second outdoor heat exchanger 5 is alternately defrosted while performing the heating operation. It can be performed.
【００２５】次に冷房小容量運転の場合について図３を
用いて説明する。ここで各室内機１２の運転状態は、室
内機１２ａ…冷房，室内機１２ｂ，１２ｃ…停止とし、
この場合の冷媒の流れは実線矢印で表し、第１の室外側
二方弁２１は開、第２の室外側二方弁２２は閉、第３の
室外側二方弁２３は閉、第４の室外側二方弁２４は閉、
第５の室外側二方弁２５は開、室内側膨張弁１３ａは各
室内負荷に応じた開度、室内側膨張弁１３ｂ，１３ｃは
全閉である。Next, the case of the cooling small capacity operation will be described with reference to FIG. Here, the operating state of each indoor unit 12 is: indoor unit 12a ... cooling, indoor unit 12b, 12c ... stopped,
The flow of the refrigerant in this case is represented by a solid line arrow, the first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, the third outdoor two-way valve 23 is closed, and the fourth outdoor four-way valve 23 is closed. The outdoor two-way valve 24 of
The fifth outdoor two-way valve 25 is open, the indoor expansion valve 13a is opened according to each indoor load, and the indoor expansion valves 13b and 13c are fully closed.
【００２６】圧縮機２より吐出された高温高圧ガスは、
四方弁３を介して、第２の室外側熱交換器５で凝縮液化
され、第２の室外側膨張弁２０を介して液管１５に流入
する。液管１５に流入した一部の冷媒は、室内側膨張弁
１３ａで減圧され、室内側熱交換器１４ａに入り、蒸発
気化したあと、第１の室外側二方弁２１、四方弁３を介
して圧縮機２の吸入側に流入する。液管１５に流入した
残りの冷媒は、第１の室外側膨張弁１９で減圧され、第
１の室外側熱交換器４に入り、蒸発気化したあと、第５
の室外側二方弁２５を介して圧縮機２の吸入側に流入
し、室内側熱交換器１４ａを通った冷媒と合流し、圧縮
機２戻り、冷房小容量運転を行なう。The high-temperature high-pressure gas discharged from the compressor 2 is
It is condensed and liquefied in the second outdoor heat exchanger 5 via the four-way valve 3, and flows into the liquid pipe 15 via the second outdoor expansion valve 20. A part of the refrigerant flowing into the liquid pipe 15 is decompressed by the indoor expansion valve 13a, enters the indoor heat exchanger 14a, evaporates and vaporizes, and then passes through the first outdoor two-way valve 21 and the four-way valve 3. And flows into the suction side of the compressor 2. The remaining refrigerant that has flowed into the liquid pipe 15 is decompressed by the first outdoor expansion valve 19, enters the first outdoor heat exchanger 4, and is evaporated and vaporized, and then the fifth
The refrigerant flows into the suction side of the compressor 2 via the outdoor two-way valve 25, merges with the refrigerant passing through the indoor heat exchanger 14a, returns to the compressor 2, and performs a small cooling capacity operation.
【００２７】次に暖房小容量運転の場合について説明す
る。ここで各室内機１２の運転状態は、室内機１２ａ…
暖房，室内機１２ｂ，１２ｃ…停止とし、この場合の冷
媒の流れは破線矢印で表し、第１の室外側二方弁２１は
開、第２の室外側二方弁２２は閉、第３の室外側二方弁
２３は閉、第４の室外側二方弁２４は開、第５の室外側
二方弁２５は閉、室内側膨張弁１３ａは各室内負荷に応
じた開度、室内側膨張弁１３ｂ，１３ｃは全閉である。Next, the case of the heating small capacity operation will be described. Here, the operating state of each indoor unit 12 is the indoor unit 12a ...
The heating and the indoor units 12b, 12c ... are stopped, and the flow of the refrigerant in this case is indicated by a dashed arrow. The first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, and the third outdoor two-way valve 22 is closed. The outdoor two-way valve 23 is closed, the fourth outdoor two-way valve 24 is open, the fifth outdoor two-way valve 25 is closed, and the indoor expansion valve 13a is opened according to each indoor load, indoor side. The expansion valves 13b and 13c are fully closed.
【００２８】圧縮機２より吐出された高温高圧ガスの一
部は、四方弁３、第１の室外側二方弁２１を介して各室
内側熱交換器１４ａに導かれ、ここで凝縮液化して各室
内側膨張弁１３ａを介して液管１５に流入する。圧縮機
２より吐出された高温高圧ガスの残りは、第４の室外側
二方弁２４を通り、第１の室外側熱交換器４で凝縮し、
第１の室外側膨張弁１９を介して液管１５に流入する。
そして、室内側熱交換器１４ａを通った冷媒と合流し、
第２の室外側膨張弁２０で減圧され、第２の室外側熱交
換器５に入り蒸発気化し、四方弁３を介して圧縮機２に
戻り、暖房小容量運転を行なう。A part of the high-temperature high-pressure gas discharged from the compressor 2 is guided to each indoor heat exchanger 14a via the four-way valve 3 and the first outdoor two-way valve 21, and condensed and liquefied there. And flows into the liquid pipe 15 via each indoor expansion valve 13a. The rest of the high-temperature high-pressure gas discharged from the compressor 2 passes through the fourth outdoor two-way valve 24 and is condensed in the first outdoor heat exchanger 4,
It flows into the liquid pipe 15 via the first outdoor expansion valve 19.
Then, it merges with the refrigerant passing through the indoor heat exchanger 14a,
The pressure is reduced by the second outdoor expansion valve 20, enters the second outdoor heat exchanger 5, evaporates and evaporates, and returns to the compressor 2 via the four-way valve 3 to perform heating small capacity operation.
【００２９】従って、冷房小容量運転（例えば２９．１
ｋＷの室外機に対して２．３ｋＷの室内機運転で圧縮機
の最小能力５．８ｋＷ）時、第２の室外側熱交換器５の
能力を５．８ｋＷに第１の室外側熱交換器４の能力を
３．５ｋＷに制御することにより、また、暖房小容量運
転（例えば２９．１ｋＷの室外機に対して２．３ｋＷの
室内機運転で圧縮機の最小能力５．８ｋＷ）時、第２の
室外側熱交換器５の能力を５．８ｋＷに第１の室外側熱
交換器４の能力を３．５ｋＷに制御することにより、圧
縮機能力、蒸発器能力、凝縮器能力をバランスさせるこ
とができ、サイクル的に安定な状態を確保できる。Therefore, the cooling small capacity operation (for example, 29.1)
When the minimum capacity of the compressor is 5.8 kW when the indoor unit operation is 2.3 kW with respect to the kW outdoor unit, the capacity of the second outdoor heat exchanger 5 is increased to 5.8 kW as the first outdoor heat exchanger. By controlling the capacity of No. 4 to 3.5 kW, and at the time of heating small capacity operation (for example, indoor unit operation of 2.3 kW for outdoor unit of 29.1 kW, minimum capacity of compressor 5.8 kW), By controlling the capacity of the outdoor heat exchanger 5 of No. 2 to 5.8 kW and the capacity of the first outdoor heat exchanger 4 to 3.5 kW, the compression function power, the evaporator capacity, and the condenser capacity are balanced. It is possible to secure a stable state in a cycle.
【００３０】以上のように、室外側熱交換器の除霜が必
要な場合、暖房運転を行いながら第１の室外側熱交換器
４または第２の室外側熱交換器５を交互に除霜を行うこ
とができる。さらに、冷房小容量運転、暖房小容量運転
時に、室外熱交換器の一方を凝縮器、他方を蒸発器とし
て動作させ、従来生じていた、圧縮機能力、蒸発器能
力、凝縮器能力のアンバランスを適正化でき、圧縮機の
信頼性および安定なシステムの運転状態を確保できる。As described above, when the outdoor heat exchanger needs to be defrosted, the first outdoor heat exchanger 4 or the second outdoor heat exchanger 5 is alternately defrosted while performing the heating operation. It can be performed. Furthermore, during cooling small capacity operation and heating small capacity operation, one of the outdoor heat exchangers is operated as a condenser and the other is operated as an evaporator, and the imbalance of compression function force, evaporator capacity, and condenser capacity, which has occurred conventionally, is unbalanced. Can be optimized, and the reliability of the compressor and the stable operating state of the system can be secured.
【００３１】次に、本発明の多室型空気調和機の第２の
実施例について図面を参照しながら説明する。尚、第１
の実施例と同一部分については同一符号を付しその詳細
な説明を省略する。Next, a second embodiment of the multi-room air conditioner of the present invention will be described with reference to the drawings. The first
The same parts as those of the embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.
【００３２】図４において、２６は多室型空気調和機の
室外機であり、第４の室外側二方弁２７を有している。In FIG. 4, reference numeral 26 is an outdoor unit of a multi-room air conditioner, which has a fourth outdoor two-way valve 27.
【００３３】四方弁３の第１路は圧縮機２の吐出側に、
四方弁２の第２路は圧縮機３の吸入側に、四方弁３の第
３路は第１の室外側二方弁２１を介しガス管１６に連通
すると共に、圧縮機２の吐出側は第２の室外側二方弁２
２を介しガス管１６に連通し、第１の室外側熱交換器４
の一方は、第３の室外側二方弁２３を介して四方弁３の
第４路に連通し、第１の室外側熱交換器４と第３の室外
側二方弁２３の間の配管を、第４の室外側二方弁２７を
介して四方弁３の第３路と第１の室外側二方弁２１の間
の配管と接続し、第２の室外側熱交換器５の一方は、四
方弁３の第４路に連通し、第１、第２の室外側熱交換器
４、５の他の一方は、それぞれ第１、第２の室外側膨張
弁１９、２０を介し、液管１５に合流接続している。The first passage of the four-way valve 3 is on the discharge side of the compressor 2,
The second path of the four-way valve 2 communicates with the suction side of the compressor 3, the third path of the four-way valve 3 communicates with the gas pipe 16 through the first outdoor two-way valve 21, and the discharge side of the compressor 2 Second outdoor two-way valve 2
2 is connected to the gas pipe 16 via the first outdoor heat exchanger 4
One of them is connected to the fourth passage of the four-way valve 3 via the third outdoor two-way valve 23, and the pipe between the first outdoor heat exchanger 4 and the third outdoor two-way valve 23 is connected. Is connected to the pipe between the third path of the four-way valve 3 and the first outdoor two-way valve 21 via the fourth outdoor two-way valve 27, and one of the second outdoor heat exchangers 5 is connected. Communicates with the fourth passage of the four-way valve 3, and the other one of the first and second outdoor heat exchangers 4 and 5 is connected via first and second outdoor expansion valves 19 and 20, respectively. It is joined to the liquid pipe 15.
【００３４】次に、このような構成においての動作につ
いて説明する。まず冷房運転の場合について説明する。
この場合の冷媒の流れは実線矢印で表し、第１の室外側
二方弁２１は開、第２の室外側二方弁２２は閉、第３の
室外側二方弁２３は開、第４の室外側二方弁２７は閉、
各室内側膨張弁１３ａ，１３ｂ，１３ｃは各室内負荷に
応じた開度である。圧縮機２より吐出された高温高圧ガ
スは、四方弁３を介して第１の室外側熱交換器４、第２
の室外側熱交換器５で凝縮液化され、第１の室外側膨張
弁１９、第２の室外側膨張弁２０を通り、各室内側膨張
弁１３ａ，１３ｂ，１３ｃで減圧され、各室内側熱交換
器１４ａ，１４ｂ，１４ｃに入りそれぞれ蒸発気化した
あと、四方弁３を介して圧縮機２に戻り、冷房運転を行
なう。Next, the operation in such a configuration will be described. First, the case of the cooling operation will be described.
The flow of the refrigerant in this case is represented by a solid line arrow, the first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, the third outdoor two-way valve 23 is open, and the fourth outdoor four-way valve 23 is open. The outdoor two-way valve 27 of
Each indoor expansion valve 13a, 13b, 13c has an opening according to each indoor load. The high-temperature high-pressure gas discharged from the compressor 2 is passed through the four-way valve 3 to the first outdoor heat exchanger 4 and the second outdoor heat exchanger 4.
Is condensed and liquefied in the outdoor heat exchanger 5 of the above, passes through the first outdoor expansion valve 19 and the second outdoor expansion valve 20, and is decompressed by the indoor expansion valves 13a, 13b, 13c, and the indoor heat After entering the exchangers 14a, 14b, 14c and evaporating and vaporizing respectively, the exchangers 14a, 14b, 14c are returned to the compressor 2 via the four-way valve 3 to perform the cooling operation.
【００３５】次に暖房運転の場合について説明する。こ
の場合の冷媒の流れは破線矢印で表し、第１の室外側二
方弁２１は開、第２の室外側二方弁２２は閉、第３の室
外側二方弁２３は開、第４の室外側二方弁２７は閉、各
室内側膨張弁１３ａ，１３ｂ，１３ｃは各室内負荷に応
じた開度である。圧縮機２より吐出された高温高圧ガス
は、四方弁３を介して各室内側熱交換器１４ａ，１４
ｂ，１４ｃに導かれ、ここで凝縮液化して各室内側膨張
弁１３ａ，１３ｂ，１３ｃを介して第１の室外側膨張弁
１９、第２の室外側膨張弁２０で減圧され、第１の室外
側熱交換器４、第２の室外側熱交換器５に入り蒸発気化
したあと、四方弁３を介して圧縮機２に戻り、暖房運転
を行なう。Next, the case of heating operation will be described. The flow of the refrigerant in this case is represented by a dashed arrow, the first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, the third outdoor two-way valve 23 is open, and the fourth outdoor four-way valve 23 is open. The outdoor two-way valve 27 is closed, and each indoor expansion valve 13a, 13b, 13c has an opening degree corresponding to each indoor load. The high-temperature high-pressure gas discharged from the compressor 2 is passed through the four-way valve 3 to the indoor heat exchangers 14a, 14a.
b, 14c, where it is condensed and liquefied to be decompressed by the first outdoor expansion valve 19 and the second outdoor expansion valve 20 via the indoor expansion valves 13a, 13b, 13c, and After entering the outdoor heat exchanger 4 and the second outdoor heat exchanger 5 to evaporate and vaporize, the air is returned to the compressor 2 via the four-way valve 3 to perform heating operation.
【００３６】次に除霜運転の場合について図５を用いて
説明する。まず、第１の室外側熱交換器４のみ除霜する
場合について説明する。この場合の冷媒の流れは実線矢
印で表し、第１の室外側二方弁２１は開、第２の室外側
二方弁２２は閉、第３の室外側二方弁２３は閉、第４の
室外側二方弁２７は開、各室内側膨張弁１３ａ，１３
ｂ，１３ｃは各室内負荷に応じた開度である。圧縮機２
より吐出された高温高圧ガスの一部は、四方弁３、第１
の室外側二方弁２１を介して各室内側熱交換器１４ａ，
１４ｂ，１４ｃに導かれ、ここで凝縮液化して各室内側
膨張弁１３ａ，１３ｂ，１３ｃを介して液管１５に流入
する。圧縮機２より吐出された高温高圧ガスの残りは、
四方弁３、第４の室外側二方弁２７を通り、第１の室外
側熱交換器４で凝縮し（第１の室外側熱交換器４は除霜
される）、第１の室外側膨張弁１９を介して液管１５に
流入する。そして、室内側熱交換器１４ａ，１４ｂ，１
４ｃを通った冷媒と合流し、第２の室外側膨張弁２０で
減圧され、第２の室外側熱交換器５に入り蒸発気化し、
四方弁３を介して圧縮機２に戻り、除霜運転を行なう。Next, the case of the defrosting operation will be described with reference to FIG. First, a case where only the first outdoor heat exchanger 4 is defrosted will be described. The flow of the refrigerant in this case is represented by a solid line arrow, the first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, the third outdoor two-way valve 23 is closed, and the fourth outdoor four-way valve 23 is closed. The outdoor two-way valve 27 is open, and the indoor expansion valves 13a, 13
b and 13c are opening degrees according to each indoor load. Compressor 2
A part of the high-temperature high-pressure gas discharged from the four-way valve 3, the first
Each indoor heat exchanger 14a via the outdoor two-way valve 21 of
14b, 14c, where it is condensed and liquefied and flows into the liquid pipe 15 via the indoor expansion valves 13a, 13b, 13c. The rest of the high temperature high pressure gas discharged from the compressor 2 is
The first outdoor side passes through the four-way valve 3 and the fourth outdoor two-way valve 27 and is condensed in the first outdoor heat exchanger 4 (the first outdoor heat exchanger 4 is defrosted). It flows into the liquid pipe 15 via the expansion valve 19. Then, the indoor heat exchangers 14a, 14b, 1
4c merges with the refrigerant, is decompressed by the second outdoor expansion valve 20, enters the second outdoor heat exchanger 5, and is evaporated and vaporized,
The defrosting operation is performed by returning to the compressor 2 via the four-way valve 3.
【００３７】次に、第２の室外側熱交換器５のみ除霜す
る場合について説明する。この場合の冷媒の流れは破線
矢印で表し、第１の室外側二方弁２１は閉、第２の室外
側二方弁２２は開、第３の室外側二方弁２３は閉、第４
の室外側二方弁２７は開、各室内側膨張弁１３ａ，１３
ｂ，１３ｃは各室内負荷に応じた開度である。圧縮機２
より吐出された高温高圧ガスの一部は、第２の室外側二
方弁２２を介して各室内側熱交換器１４ａ，１４ｂ，１
４ｃに導かれ、ここで凝縮液化して各室内側膨張弁１３
ａ，１３ｂ，１３ｃを介して液管１５に流入する。圧縮
機２より吐出された高温高圧ガスの残りは、四方弁３を
介して第２の室外側熱交換器５で凝縮し（第２の室外側
熱交換器５は除霜される）、第２の室外側膨張弁２０を
介して液管１５に流入する。そして、室内側熱交換器１
４ａ，１４ｂ，１４ｃを通った冷媒と合流し、第１の室
外側膨張弁１９で減圧され、第１の室外側熱交換器４に
入り蒸発気化し、第４の室外側二方弁２７を通り、四方
弁３を介して圧縮機２に戻り、除霜運転を行なう。Next, a case where only the second outdoor heat exchanger 5 is defrosted will be described. The flow of the refrigerant in this case is represented by a dashed arrow, the first outdoor two-way valve 21 is closed, the second outdoor two-way valve 22 is open, the third outdoor two-way valve 23 is closed, and the fourth outdoor four-way valve 23 is closed.
The outdoor two-way valve 27 is open, and the indoor expansion valves 13a, 13
b and 13c are opening degrees according to each indoor load. Compressor 2
A part of the high-temperature high-pressure gas discharged from the interior heat exchangers 14a, 14b, 1 passes through the second outdoor two-way valve 22.
4c, where it is condensed and liquefied, and each indoor expansion valve 13
It flows into the liquid pipe 15 via a, 13b, and 13c. The rest of the high-temperature high-pressure gas discharged from the compressor 2 is condensed in the second outdoor heat exchanger 5 via the four-way valve 3 (the second outdoor heat exchanger 5 is defrosted), and It flows into the liquid pipe 15 via the second outdoor expansion valve 20. And the indoor heat exchanger 1
4a, 14b, 14c merges with the refrigerant, is decompressed by the first outdoor expansion valve 19, enters the first outdoor heat exchanger 4, and is evaporated and vaporized, and the fourth outdoor two-way valve 27 is turned on. As described above, the defrosting operation is performed by returning to the compressor 2 via the four-way valve 3.
【００３８】従って、このように室外側熱交換器の除霜
が必要な場合、暖房運転を行いながら第１の室外側熱交
換器４または第２の室外側熱交換器５を交互に除霜を行
うことができる。Therefore, when it is necessary to defrost the outdoor heat exchanger in this way, the first outdoor heat exchanger 4 or the second outdoor heat exchanger 5 is alternately defrosted while performing the heating operation. It can be performed.
【００３９】次に冷房小容量運転の場合について図６を
用いて説明する。ここで各室内機１２の運転状態は、室
内機１２ａ…冷房，室内機１２ｂ，１２ｃ…停止とし、
この場合の冷媒の流れは実線矢印で表し、第１の室外側
二方弁２１は開、第２の室外側二方弁２２は閉、第３の
室外側二方弁２３は閉、第４の室外側二方弁２４は開、
室内側膨張弁１３ａは各室内負荷に応じた開度、室内側
膨張弁１３ｂ，１３ｃは全閉である。Next, the case of the cooling small capacity operation will be described with reference to FIG. Here, the operating state of each indoor unit 12 is: indoor unit 12a ... cooling, indoor unit 12b, 12c ... stopped,
The flow of the refrigerant in this case is represented by a solid line arrow, the first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, the third outdoor two-way valve 23 is closed, and the fourth outdoor four-way valve 23 is closed. The outdoor two-way valve 24 of
The indoor expansion valve 13a is opened according to each indoor load, and the indoor expansion valves 13b and 13c are fully closed.
【００４０】圧縮機２より吐出された高温高圧ガスは、
四方弁３を介して、第２の室外側熱交換器５で凝縮液化
され、第２の室外側膨張弁２０を介して液管１５に流入
する。液管１５に流入した一部の冷媒は、室内側膨張弁
１３ａで減圧され、室内側熱交換器１４ａに入り、蒸発
気化したあと、第１の室外側二方弁２１を介して四方弁
３の第３路に流入する。液管１５に流入した残りの冷媒
は、第１の室外側膨張弁１９で減圧され、第１の室外側
熱交換器４に入り、蒸発気化したあと、第４の室外側二
方弁２７を介して四方弁３の第３路に流入し、室内側熱
交換器１４ａを通った冷媒と合流し、四方弁３を介して
圧縮機２に戻り、冷房小容量運転を行なう。The high-temperature high-pressure gas discharged from the compressor 2 is
It is condensed and liquefied in the second outdoor heat exchanger 5 via the four-way valve 3, and flows into the liquid pipe 15 via the second outdoor expansion valve 20. A part of the refrigerant flowing into the liquid pipe 15 is decompressed by the indoor expansion valve 13a, enters the indoor heat exchanger 14a, evaporates and vaporizes, and then passes through the first outdoor two-way valve 21 and then the four-way valve 3 Flows into the third road. The remaining refrigerant flowing into the liquid pipe 15 is decompressed by the first outdoor expansion valve 19, enters the first outdoor heat exchanger 4, and is evaporated and vaporized, and then the fourth outdoor two-way valve 27 is operated. Through the four-way valve 3 into the third passage, merges with the refrigerant passing through the indoor heat exchanger 14a, returns to the compressor 2 via the four-way valve 3, and performs a small cooling capacity operation.
【００４１】次に暖房小容量運転の場合について説明す
る。ここで各室内機１２の運転状態は、室内機１２ａ…
暖房，室内機１２ｂ，１２ｃ…停止とし、この場合の冷
媒の流れは破線矢印で表し、第１の室外側二方弁２１は
開、第２の室外側二方弁２２は閉、第３の室外側二方弁
２３は閉、第４の室外側二方弁２４は開、第５の室外側
二方弁２５は閉、室内側膨張弁１３ａは各室内負荷に応
じた開度、室内側膨張弁１３ｂ，１３ｃは全閉である。Next, the case of the heating small capacity operation will be described. Here, the operating state of each indoor unit 12 is the indoor unit 12a ...
The heating and the indoor units 12b, 12c ... are stopped, and the flow of the refrigerant in this case is indicated by a dashed arrow. The first outdoor two-way valve 21 is open, the second outdoor two-way valve 22 is closed, and the third outdoor two-way valve 22 is closed. The outdoor two-way valve 23 is closed, the fourth outdoor two-way valve 24 is open, the fifth outdoor two-way valve 25 is closed, and the indoor expansion valve 13a is opened according to each indoor load, indoor side. The expansion valves 13b and 13c are fully closed.
【００４２】圧縮機２より吐出された高温高圧ガスの一
部は、四方弁３、第１の室外側二方弁２１を介して各室
内側熱交換器１４ａに導かれ、ここで凝縮液化して各室
内側膨張弁１３ａを介して液管１５に流入する。圧縮機
２より吐出された高温高圧ガスの残りは、第４の室外側
二方弁２４を通り、第１の室外側熱交換器４で凝縮し、
第１の室外側膨張弁１９を介して液管１５に流入する。
そして、室内側熱交換器１４ａを通った冷媒と合流し、
第２の室外側膨張弁２０で減圧され、第２の室外側熱交
換器５に入り蒸発気化し、四方弁３を介して圧縮機２に
戻り、暖房小容量運転を行なう。A portion of the high-temperature high-pressure gas discharged from the compressor 2 is guided to each indoor heat exchanger 14a via the four-way valve 3 and the first outdoor two-way valve 21, and condensed and liquefied there. And flows into the liquid pipe 15 via each indoor expansion valve 13a. The rest of the high-temperature high-pressure gas discharged from the compressor 2 passes through the fourth outdoor two-way valve 24 and is condensed in the first outdoor heat exchanger 4,
It flows into the liquid pipe 15 via the first outdoor expansion valve 19.
Then, it merges with the refrigerant passing through the indoor heat exchanger 14a,
The pressure is reduced by the second outdoor expansion valve 20, enters the second outdoor heat exchanger 5, evaporates and evaporates, and returns to the compressor 2 via the four-way valve 3 to perform heating small capacity operation.
【００４３】従って、冷房小容量運転（例えば２９．１
ｋＷの室外機に対して２．３ｋＷの室内機運転で圧縮機
の最小能力５．８ｋＷ）時、第２の室外側熱交換器５の
能力を５．８ｋＷに第１の室外側熱交換器４の能力を
３．５ｋＷに制御することにより、また、暖房小容量運
転（例えば２９．１ｋＷの室外機に対して２．３ｋＷの
室内機運転で圧縮機の最小能力５．８ｋＷ）時、第２の
室外側熱交換器５の能力を５．８ｋＷに第１の室外側熱
交換器４の能力を３．５ｋＷに制御することにより、圧
縮機能力、蒸発器能力、凝縮器能力をバランスさせるこ
とができ、サイクル的に安定な状態を確保できる。Therefore, the cooling small capacity operation (for example, 29.1) is performed.
When the minimum capacity of the compressor is 5.8 kW when the indoor unit operation is 2.3 kW with respect to the kW outdoor unit, the capacity of the second outdoor heat exchanger 5 is increased to 5.8 kW as the first outdoor heat exchanger. By controlling the capacity of No. 4 to 3.5 kW, and at the time of heating small capacity operation (for example, indoor unit operation of 2.3 kW for outdoor unit of 29.1 kW, minimum capacity of compressor 5.8 kW), By controlling the capacity of the outdoor heat exchanger 5 of No. 2 to 5.8 kW and the capacity of the first outdoor heat exchanger 4 to 3.5 kW, the compression function power, the evaporator capacity, and the condenser capacity are balanced. It is possible to secure a stable state in a cycle.
【００４４】以上のように、室外側熱交換器の除霜が必
要な場合、暖房運転を行いながら第１の室外側熱交換器
４または第２の室外側熱交換器５を交互に除霜を行うこ
とができる。さらに、冷房小容量運転、暖房小容量運転
時に、室外熱交換器の一方を凝縮器、他方を蒸発器とし
て動作させ、従来生じていた、圧縮機能力、蒸発器能
力、凝縮器能力のアンバランスを適正化でき、圧縮機の
信頼性および安定なシステムの運転状態を確保できる。As described above, when the outdoor heat exchanger needs to be defrosted, the first outdoor heat exchanger 4 or the second outdoor heat exchanger 5 is alternately defrosted while performing the heating operation. It can be performed. Furthermore, during cooling small capacity operation and heating small capacity operation, one of the outdoor heat exchangers is operated as a condenser and the other is operated as an evaporator, and the imbalance of compression function force, evaporator capacity, and condenser capacity, which has occurred conventionally, is unbalanced. Can be optimized, and the reliability of the compressor and the stable operating state of the system can be secured.
【００４５】[0045]
【発明の効果】以上の説明から明らかなように本発明
は、四方弁の第１路は前記圧縮機の吐出側に、前記四方
弁の第２路は前記圧縮機の吸入側に、前記四方弁の第３
路は前記第１の室外側二方弁を介し前記ガス管に連通す
ると共に、前記圧縮機の吐出側は前記第２の室外側二方
弁を介し前記ガス管に連通し、前記第１の室外側熱交換
器の一方は、前記第３の室外側二方弁を介して前記四方
弁の第４路に連通し、前記第１の室外側熱交換器と前記
第３の室外側二方弁の間の配管を、前記第４の室外側二
方弁を介して前記圧縮機の吐出側と、前記第５の室外側
二方弁を介して前記圧縮機の吸入側と接続し、前記第２
の室外側熱交換器の一方は、前記四方弁の第４路に連通
し、前記第１、第２の室外側熱交換器の他の一方は、そ
れぞれ前記第１、第２の室外側膨張弁を介し、前記液管
に合流接続した構成とするものである。As is apparent from the above description, according to the present invention, the first passage of the four-way valve is on the discharge side of the compressor, the second passage of the four-way valve is on the suction side of the compressor, and the four-way valve is on the four-way side. Valve third
The passage communicates with the gas pipe through the first outdoor two-way valve, and the discharge side of the compressor communicates with the gas pipe through the second outdoor two-way valve, One of the outdoor heat exchangers communicates with the fourth passage of the four-way valve via the third outdoor two-way valve, and the first outdoor heat exchanger and the third outdoor two-way A pipe between the valves is connected to the discharge side of the compressor via the fourth outdoor two-way valve and to the suction side of the compressor via the fifth outdoor two-way valve; Second
One of the outdoor heat exchangers of the four outdoor valves is connected to the fourth passage of the four-way valve, and the other one of the first and second outdoor heat exchangers is connected to the first and second outdoor expansions, respectively. The liquid pipe is joined and connected via a valve.
【００４６】そのため、室外側熱交換器の除霜が必要な
場合、暖房運転を行いながら第１の室外側熱交換器４ま
たは第２の室外側熱交換器５を交互に除霜を行うことが
できる。さらに、冷房小容量運転、暖房小容量運転時
に、室外熱交換器の一方を凝縮器、他方を蒸発器として
動作させようにし、従来生じていた、圧縮機能力、蒸発
器能力、凝縮器能力のアンバランスを適正化でき、圧縮
機の信頼性および安定なシステムの運転状態を確保でき
る。Therefore, when the outdoor heat exchanger needs to be defrosted, the first outdoor heat exchanger 4 or the second outdoor heat exchanger 5 is alternately defrosted while performing the heating operation. You can Furthermore, during cooling small capacity operation and heating small capacity operation, one of the outdoor heat exchangers is operated as a condenser and the other is operated as an evaporator, so that the compression function, the evaporator capacity, and the condenser capacity, which have been generated conventionally, can be reduced. The imbalance can be optimized, and the reliability of the compressor and the stable operating state of the system can be secured.
【００４７】また、他の本発明は、四方弁の第１路は前
記圧縮機の吐出側に、前記四方弁の第２路は前記圧縮機
の吸入側に、前記四方弁の第３路は前記第１の室外側二
方弁を介し前記ガス管に連通すると共に、前記圧縮機の
吐出側は前記第２の室外側二方弁を介し前記ガス管に連
通し、前記第１の室外側熱交換器の一方は、前記第３の
室外側二方弁を介して前記四方弁の第４路に連通し、前
記第１の室外側熱交換器と前記第３の室外側二方弁の間
の配管を、前記第４の室外側二方弁を介して前記四方弁
の第３路と前記第１の室外側二方弁の間の配管と接続
し、前記第２の室外側熱交換器の一方は、前記四方弁の
第４路に連通し、前記第１、第２の室外側熱交換器の他
の一方は、それぞれ前記第１、第２の室外側膨張弁を介
し、前記液管に合流接続した構成とするものである。According to another aspect of the present invention, the first passage of the four-way valve is on the discharge side of the compressor, the second passage of the four-way valve is on the suction side of the compressor, and the third passage of the four-way valve is While communicating with the gas pipe through the first outdoor two-way valve, the discharge side of the compressor communicates with the gas pipe through the second outdoor two-way valve, and the first outdoor side One of the heat exchangers communicates with the fourth passage of the four-way valve via the third outdoor two-way valve, and connects one of the first outdoor heat exchanger and the third outdoor two-way valve. A pipe between the third passage of the four-way valve and the pipe between the first outdoor two-way valve via the fourth outdoor two-way valve, and the second outdoor heat exchange One of the units communicates with the fourth passage of the four-way valve, and the other of the first and second outdoor heat exchangers passes through the first and second outdoor expansion valves, respectively, and Join the liquid pipe It is an continue to configuration.
【００４８】そのため、第５の室外側二方弁を省略で
き、さらに安価な構成で、圧縮機能力、蒸発器能力、凝
縮器能力のアンバランスを適正化でき、圧縮機の信頼性
および安定なシステムの運転状態を確保できる。Therefore, the fifth outdoor two-way valve can be omitted, and the imbalance of the compression function force, the evaporator capacity, and the condenser capacity can be optimized with a more inexpensive structure, and the reliability and stability of the compressor can be improved. The operating state of the system can be secured.
【図１】本発明の第１の実施例における多室型空気調和
機の冷凍サイクル図FIG. 1 is a refrigeration cycle diagram of a multi-room air conditioner according to a first embodiment of the present invention.
【図２】同実施例の多室型空気調和機の除霜運転状態を
示す冷凍サイクル図FIG. 2 is a refrigeration cycle diagram showing a defrosting operation state of the multi-room air conditioner of the same embodiment.
【図３】同実施例の多室型空気調和機の小容量運転状態
を示す冷凍サイクル図FIG. 3 is a refrigeration cycle diagram showing a small capacity operation state of the multi-room air conditioner of the same embodiment.
【図４】本発明の第２の実施例における多室型空気調和
機の冷凍サイクル図FIG. 4 is a refrigeration cycle diagram of a multi-room air conditioner according to a second embodiment of the present invention.
【図５】同実施例の多室型空気調和機の除霜運転状態を
示す冷凍サイクル図FIG. 5 is a refrigeration cycle diagram showing a defrosting operation state of the multi-room air conditioner of the same embodiment.
【図６】同実施例の多室型空気調和機の小容量運転状態
を示す冷凍サイクル図FIG. 6 is a refrigeration cycle diagram showing a small capacity operation state of the multi-room air conditioner of the same embodiment.
【図７】従来の多室型空気調和機の冷凍サイクル図FIG. 7 is a refrigeration cycle diagram of a conventional multi-room air conditioner.
【図８】同従来例の多室型空気調和機の除霜運転状態を
示す冷凍サイクル図FIG. 8 is a refrigeration cycle diagram showing a defrosting operation state of the conventional multi-room air conditioner.
２ 圧縮機 ３ 四方弁 ４ 第１の室外側熱交換器 ５ 第２の室外側熱交換器 １２ 室内機 １３ 室内側膨張弁 １４ 室内側熱交換器 １５ 液管 １６ ガス管 １８ 室外機 １９ 第１の室外側膨張弁 ２０ 第２の室外側膨張弁 ２１ 第１の室外側二方弁 ２２ 第２の室外側二方弁 ２３ 第３の室外側二方弁 ２４ 第４の室外側二方弁 ２５ 第５の室外側二方弁 2 Compressor 3 Four-way valve 4 First outdoor heat exchanger 5 Second outdoor heat exchanger 12 Indoor unit 13 Indoor expansion valve 14 Indoor heat exchanger 15 Liquid pipe 16 Gas pipe 18 Outdoor unit 19 1st Outdoor expansion valve 20 second outdoor expansion valve 21 first outdoor two-way valve 22 second outdoor two-way valve 23 third outdoor two-way valve 24 fourth outdoor two-way valve 25 Fifth outdoor two-way valve
Claims (2)
器、第２の室外側熱交換器、第１の室外側膨張弁、第２
の室外側膨張弁、第１の室外側二方弁、第２の室外側二
方弁、第３の室外側二方弁、第４の室外側二方弁、第５
の室外側二方弁から成る室外機と、室内側膨張弁、室内
側熱交換器から成る複数の室内機とをガス管及び液管を
介して接続し、前記四方弁の第１路は前記圧縮機の吐出
側に、前記四方弁の第２路は前記圧縮機の吸入側に、前
記四方弁の第３路は前記第１の室外側二方弁を介し前記
ガス管に連通すると共に、前記圧縮機の吐出側は前記第
２の室外側二方弁を介し前記ガス管に連通し、前記第１
の室外側熱交換器の一方は、前記第３の室外側二方弁を
介して前記四方弁の第４路に連通し、前記第１の室外側
熱交換器と前記第３の室外側二方弁の間の配管を、前記
第４の室外側二方弁を介して前記圧縮機の吐出側と、前
記第５の室外側二方弁を介して前記圧縮機の吸入側と接
続し、前記第２の室外側熱交換器の一方は、前記四方弁
の第４路に連通し、前記第１、第２の室外側熱交換器の
他の一方は、それぞれ前記第１、第２の室外側膨張弁を
介し、前記液管に合流接続し、前記室内側熱交換器の一
方は、前記ガス管に、前記室内側熱交換器の他の一方
は、前記室内側膨張弁を介し前記液管に接続した多室型
空気調和機。1. A compressor, a four-way valve, a first outdoor heat exchanger, a second outdoor heat exchanger, a first outdoor expansion valve, a second
Outdoor expansion valve, first outdoor two-way valve, second outdoor two-way valve, third outdoor two-way valve, fourth outdoor two-way valve, fifth
The outdoor unit consisting of the outdoor two-way valve and the plurality of indoor units consisting of the indoor expansion valve and the indoor heat exchanger are connected via a gas pipe and a liquid pipe, and the first path of the four-way valve is On the discharge side of the compressor, the second path of the four-way valve communicates with the suction side of the compressor, and the third path of the four-way valve communicates with the gas pipe through the first outdoor two-way valve, The discharge side of the compressor communicates with the gas pipe through the second outdoor two-way valve,
One of the outdoor heat exchangers of No. 2 and 3 communicates with the fourth passage of the four-way valve via the third outdoor two-way valve, and the first outdoor heat exchanger and the third outdoor two-way valve. A pipe between the one-way valves is connected to the discharge side of the compressor via the fourth outdoor two-way valve and to the suction side of the compressor via the fifth outdoor two-way valve, One of the second outdoor heat exchangers communicates with the fourth passage of the four-way valve, and the other one of the first and second outdoor heat exchangers has the first and second outdoor heat exchangers, respectively. Through the outdoor expansion valve, is joined and connected to the liquid pipe, one of the indoor heat exchanger is connected to the gas pipe, and the other one of the indoor heat exchanger is connected to the liquid expansion pipe via the indoor expansion valve. A multi-room air conditioner connected to a liquid pipe.
器、第２の室外側熱交換器、第１の室外側膨張弁、第２
の室外側膨張弁、第１の室外側二方弁、第２の室外側二
方弁、第３の室外側二方弁、第４の室外側二方弁から成
る室外機と、室内側膨張弁、室内側熱交換器から成る複
数の室内機とをガス管及び液管を介して接続し、前記四
方弁の第１路は前記圧縮機の吐出側に、前記四方弁の第
２路は前記圧縮機の吸入側に、前記四方弁の第３路は前
記第１の室外側二方弁を介し前記ガス管に連通すると共
に、前記圧縮機の吐出側は前記第２の室外側二方弁を介
し前記ガス管に連通し、前記第１の室外側熱交換器の一
方は、前記第３の室外側二方弁を介して前記四方弁の第
４路に連通し、前記第１の室外側熱交換器と前記第３の
室外側二方弁の間の配管を、前記第４の室外側二方弁を
介して前記四方弁の第３路と前記第１の室外側二方弁の
間の配管と接続し、前記第２の室外側熱交換器の一方
は、前記四方弁の第４路に連通し、前記第１、第２の室
外側熱交換器の他の一方は、それぞれ前記第１、第２の
室外側膨張弁を介し、前記液管に合流接続し、前記室内
側熱交換器の一方は、前記ガス管に、前記室内側熱交換
器の他の一方は、前記室内側膨張弁を介し前記液管に接
続した多室型空気調和機。2. A compressor, a four-way valve, a first outdoor heat exchanger, a second outdoor heat exchanger, a first outdoor expansion valve, a second
Outdoor unit including an outdoor expansion valve, a first outdoor two-way valve, a second outdoor two-way valve, a third outdoor two-way valve, and a fourth outdoor two-way valve, and an indoor expansion A plurality of indoor units consisting of a valve and an indoor heat exchanger are connected via a gas pipe and a liquid pipe, the first passage of the four-way valve is on the discharge side of the compressor, and the second passage of the four-way valve is On the suction side of the compressor, the third passage of the four-way valve communicates with the gas pipe via the first outdoor two-way valve, and the discharge side of the compressor has the second outdoor two-way. Communicates with the gas pipe via a valve, and one of the first outdoor heat exchangers communicates with a fourth passage of the four-way valve via the third outdoor two-way valve, The pipe between the outdoor heat exchanger and the third outdoor two-way valve is connected to the third passage of the four-way valve via the fourth outdoor two-way valve and the first outdoor two-way valve. Connect with the piping between One of the second outdoor heat exchangers communicates with the fourth passage of the four-way valve, and the other one of the first and second outdoor heat exchangers has the first and second outdoor heat exchangers, respectively. Through the outdoor expansion valve, is joined and connected to the liquid pipe, one of the indoor heat exchanger is connected to the gas pipe, and the other one of the indoor heat exchanger is connected to the liquid expansion pipe via the indoor expansion valve. A multi-room air conditioner connected to a liquid pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5039599A JPH06257902A (en) | 1993-03-01 | 1993-03-01 | Multiple room type air conditioning apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5039599A JPH06257902A (en) | 1993-03-01 | 1993-03-01 | Multiple room type air conditioning apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06257902A true JPH06257902A (en) | 1994-09-16 |
Family
ID=12557583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5039599A Pending JPH06257902A (en) | 1993-03-01 | 1993-03-01 | Multiple room type air conditioning apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06257902A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1197710A2 (en) * | 2000-10-13 | 2002-04-17 | Eaton-Williams Group Limited | Heat pump equipment |
| KR100337921B1 (en) * | 1999-11-29 | 2002-05-23 | 윤종용 | Multi type refrigerating cycle and air conditioner having multi type refrigerating |
| WO2010082325A1 (en) * | 2009-01-15 | 2010-07-22 | 三菱電機株式会社 | Air conditioner |
| CN112594871A (en) * | 2020-12-31 | 2021-04-02 | 广东积微科技有限公司 | Defrosting control method of multifunctional multi-split system with double four-way valves |
-
1993
- 1993-03-01 JP JP5039599A patent/JPH06257902A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100337921B1 (en) * | 1999-11-29 | 2002-05-23 | 윤종용 | Multi type refrigerating cycle and air conditioner having multi type refrigerating |
| EP1197710A2 (en) * | 2000-10-13 | 2002-04-17 | Eaton-Williams Group Limited | Heat pump equipment |
| EP1197710A3 (en) * | 2000-10-13 | 2003-03-05 | Eaton-Williams Group Limited | Heat pump equipment |
| US6751976B2 (en) | 2000-10-13 | 2004-06-22 | Eaton-Williams Group Limited | Heat pump equipment |
| WO2010082325A1 (en) * | 2009-01-15 | 2010-07-22 | 三菱電機株式会社 | Air conditioner |
| CN102272534A (en) * | 2009-01-15 | 2011-12-07 | 三菱电机株式会社 | Morimoto osamu [jp]; saito makoto [jp]; yanachi satoru [jp]; yamashita koji |
| US9506674B2 (en) | 2009-01-15 | 2016-11-29 | Mitsubishi Electric Corporation | Air conditioner including a bypass pipeline for a defrosting operation |
| CN112594871A (en) * | 2020-12-31 | 2021-04-02 | 广东积微科技有限公司 | Defrosting control method of multifunctional multi-split system with double four-way valves |
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