JP2001174090A - Multiple-chamber air-conditioner - Google Patents
Multiple-chamber air-conditionerInfo
- Publication number
- JP2001174090A JP2001174090A JP36076099A JP36076099A JP2001174090A JP 2001174090 A JP2001174090 A JP 2001174090A JP 36076099 A JP36076099 A JP 36076099A JP 36076099 A JP36076099 A JP 36076099A JP 2001174090 A JP2001174090 A JP 2001174090A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- heat exchanger
- indoor heat
- refrigerant
- 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]
【発明の属する技術分野】本発明は、多室形空気調和機
に係わり、より詳細には、一方の室内機を冷房運転する
と同時に、他方の室内機を暖房運転できるようにした冷
媒回路の構成に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-room air conditioner, and more particularly, to a configuration of a refrigerant circuit in which one indoor unit can be operated for cooling while the other indoor unit can be operated for heating. About.
【０００２】[0002]
【従来の技術】従来の多室形空気調和機は、例えば図５
で示すような冷媒回路で構成されている。図において、
21は室外機、22a および22b は第一室内機と、第二室内
機である。23は冷媒を圧縮し高温高圧のガスにする圧縮
機、24は冷媒の流れる方向を変えて冷房運転と暖房運転
の切り換えを行う四方弁、25は冷房運転時に凝縮器、暖
房運転時に蒸発器として機能する室外熱交換器である。
26a および26b は冷房運転時に蒸発器、暖房運転時に凝
縮器として機能し、前記第一室内機22a および第二室内
機22b にそれぞれ搭載された第一室内熱交換器と第一室
内熱交換器である。2. Description of the Related Art A conventional multi-room air conditioner is shown in FIG.
And a refrigerant circuit as shown in FIG. In the figure,
21 is an outdoor unit, 22a and 22b are a first indoor unit and a second indoor unit. 23 is a compressor that compresses the refrigerant into a high-temperature and high-pressure gas, 24 is a four-way valve that changes the direction of flow of the refrigerant to switch between cooling operation and heating operation, 25 is a condenser during cooling operation and an evaporator during heating operation It is an outdoor heat exchanger that works.
26a and 26b function as an evaporator during the cooling operation and as a condenser during the heating operation, and include a first indoor heat exchanger and a first indoor heat exchanger mounted on the first indoor unit 22a and the second indoor unit 22b, respectively. is there.
【０００３】前記室外熱交換器25に第一膨張弁27および
前記第一室内機22a の第一室内熱交換器26a と、第二膨
張弁28および前記第二室内機22b の第二室内熱交換器26
b とを、ディストリビュータ29により分岐し、接続配管
により前記四方弁24に並列に接続して冷凍サイクルを形
成した構成となっている。The outdoor heat exchanger 25 has a first expansion valve 27 and a first indoor heat exchanger 26a of the first indoor unit 22a, and a second expansion valve 28 and a second indoor heat exchange of the second indoor unit 22b. Container 26
b is branched by a distributor 29 and connected in parallel to the four-way valve 24 by a connection pipe to form a refrigeration cycle.
【０００４】上記構成において、冷房運転時は、圧縮機
27から吐出された高温高圧の冷媒は破線矢印で示すよう
に前記四方弁24を通り、前記室外熱交換器25に流入し、
室外に熱を放出して凝縮液化し、前記ディストリビュー
タ29により分岐して、前記第一膨張弁27および第二膨張
弁28により減圧膨張し、前記室内機22a の室内熱交換器
26a および前記室内機22b の室内熱交換器26b に流入し
て蒸発気化し、室内の熱を吸収した後、四方弁24を経
て、再び前記圧縮機23に流入する。[0004] In the above configuration, during the cooling operation, the compressor
The high-temperature and high-pressure refrigerant discharged from 27 passes through the four-way valve 24 as shown by a dashed arrow, flows into the outdoor heat exchanger 25,
The heat is released to the outside of the room, condensed and liquefied, branched by the distributor 29, decompressed and expanded by the first expansion valve 27 and the second expansion valve 28, and the indoor heat exchanger of the indoor unit 22a.
After flowing into the indoor heat exchanger 26b of the indoor unit 26b and evaporating and evaporating and absorbing the indoor heat, it flows into the compressor 23 again through the four-way valve 24.
【０００５】暖房運転時は、前記圧縮機23から吐出され
た高温高圧の冷媒は、実線矢印で示すように前記四方弁
24を通り前記室内機22a の室内熱交換器26a および前記
室内機22b の室内熱交換器26b に流入し、室内に熱を放
出して凝縮液化した後、前記第一膨張弁27および第二膨
張弁28により減圧膨張し、前記ディストリビュータ29に
より合流して前記室外熱交換器25に流入する。同室外熱
交換器25にて冷媒は蒸発気化して室外の熱を吸収した
後、前記四方弁24をを経て再び前記圧縮機23に流入す
る。During the heating operation, the high-temperature and high-pressure refrigerant discharged from the compressor 23 is supplied to the four-way valve as indicated by a solid arrow.
After flowing into the indoor heat exchanger 26a of the indoor unit 22a and the indoor heat exchanger 26b of the indoor unit 22b, and releasing heat into the room to condense and liquefy, the first expansion valve 27 and the second expansion valve It is decompressed and expanded by the valve 28, joined by the distributor 29 and flows into the outdoor heat exchanger 25. The refrigerant evaporates and evaporates in the outdoor heat exchanger 25 to absorb outdoor heat, and then flows into the compressor 23 again through the four-way valve 24.
【０００６】しかしながら、上記のような構成では、特
に、暖房運転時に一方の室内機を停止した場合、停止し
た側の膨張弁（液側）を全閉することで、停止側の室内
熱交換器に冷媒を溜める方式であるが、吐出ガスを直接
室内熱交換器内に入れているため、効率よく冷媒を溜め
ることが難しく、暖房能力の低下の原因となっていた。
また、上記のような多室形専用の空気調和機では、室内
機を増設できないという問題を有している。このため、
室外機と室内機が１対１のシングル型のスプリット型エ
アコンでも新たに室内機を増設できる空気調和機が望ま
れていた。However, in the above configuration, particularly when one of the indoor units is stopped during the heating operation, the expansion valve (liquid side) on the stopped side is fully closed, so that the indoor heat exchanger on the stopped side. However, since the discharged gas is directly introduced into the indoor heat exchanger, it is difficult to efficiently store the refrigerant, causing a decrease in the heating capacity.
In addition, the air conditioner dedicated to the multi-room type as described above has a problem that the number of indoor units cannot be increased. For this reason,
There has been a demand for an air conditioner that can newly add an indoor unit even with a single split type air conditioner in which the outdoor unit and the indoor unit are one-to-one.
【０００７】[0007]
【発明が解決しようとする課題】本発明においては、上
記問題点に鑑み、一台の室外機に室内機を新たに増設で
きる冷媒分配ユニットを備え、且つ、一方の室内機を停
止した場合、停止側の室内熱交換器に冷媒を溜めるレシ
ーバタンクとして使用し、冷媒量を最適にして効率良い
運転ができる多室形空気調和機を提供することを目的と
する。SUMMARY OF THE INVENTION In view of the above problems, in the present invention, when one outdoor unit is provided with a refrigerant distribution unit capable of newly adding an indoor unit and one of the indoor units is stopped, An object of the present invention is to provide a multi-room air conditioner that can be used as a receiver tank that stores refrigerant in a stop-side indoor heat exchanger and that can operate efficiently by optimizing the amount of refrigerant.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記課題を解
決するため、圧縮機と、四方弁と、室外熱交換器と、膨
張弁と、同膨張弁と前記四方弁に並列に、第一室内機を
構成する第一室内熱交換器と、第二室内機を構成する第
二室内熱交換器を接続して冷凍サイクルを形成してなる
多室形空気調和機において、前記膨張弁および前記四方
弁と、前記第一室内熱交換器および前記第二室内熱交換
器との間に冷媒分配ユニットを設け、同冷媒分配ユニッ
トに第一開閉弁、第二開閉弁、第三開閉弁および第四開
閉弁を配設し、前記膨張弁と前記第一室内熱交換器間に
前記第一開閉弁を接続するとともに、前記第一室内熱交
換器と前記四方弁間に前記第二開閉弁を接続し、前記膨
張弁と前記第二室内熱交換器間に前記第三開閉弁を接続
する一方、前記第二室内熱交換器と前記四方弁間に前記
第四開閉弁を接続し、前記第一開閉弁と前記第一室内熱
交換器との接続部と、前記第三開閉弁と前記第二室内熱
交換器との接続部間に、前記冷媒分配ユニット内に配設
されるバイパス管を設け、前記第一室内機および第二室
内機を冷房運転または暖房運転に、同時あるいは何れか
一方を運転するようにした構成となっている。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and a four-way valve. In a multi-room air conditioner that forms a refrigeration cycle by connecting a first indoor heat exchanger that constitutes one indoor unit and a second indoor heat exchanger that constitutes a second indoor unit, the expansion valve and A refrigerant distribution unit is provided between the four-way valve and the first indoor heat exchanger and the second indoor heat exchanger, and the refrigerant distribution unit includes a first on-off valve, a second on-off valve, a third on-off valve and A fourth on-off valve is provided, the first on-off valve is connected between the expansion valve and the first indoor heat exchanger, and the second on-off valve is provided between the first indoor heat exchanger and the four-way valve. While connecting the third on-off valve between the expansion valve and the second indoor heat exchanger, Connecting the fourth on-off valve between the indoor heat exchanger and the four-way valve, connecting the first on-off valve and the first indoor heat exchanger, the third on-off valve and the second indoor heat exchange A bypass pipe provided in the refrigerant distribution unit is provided between the connection unit to the cooling unit and the first indoor unit and the second indoor unit in the cooling operation or the heating operation, and the simultaneous operation or the one operation is performed. The configuration is as follows.
【０００９】また、前記第一室内機を冷房運転または暖
房運転し、前記第二室内機を停止した際、前記第三開閉
弁および第四開閉弁を閉じ、冷媒を前記バイパス管を経
由して前記第二室内熱交換器に流入させ、同二室内熱交
換器を冷媒のレシーバタンクとして使用し、冷媒回路内
の冷媒量を調節する構成となっている。Further, when the first indoor unit is operated for cooling or heating and the second indoor unit is stopped, the third opening and closing valve and the fourth opening and closing valve are closed, and the refrigerant passes through the bypass pipe. The second indoor heat exchanger flows into the second indoor heat exchanger, and the second indoor heat exchanger is used as a refrigerant receiver tank to regulate the amount of refrigerant in the refrigerant circuit.
【００１０】また、前記第二室内機を冷房運転または暖
房運転し、前記第一室内機を停止した際、前記第一開閉
弁および第二開閉弁を閉じ、冷媒を前記バイパス管を経
由して前記第一室内熱交換器に流入させ、同一室内熱交
換器を冷媒のレシーバタンクとして使用し、冷媒回路内
の冷媒量を調節する構成となっている。Further, when the second indoor unit is operated for cooling or heating and the first indoor unit is stopped, the first on-off valve and the second on-off valve are closed, and the refrigerant passes through the bypass pipe. The refrigerant flows into the first indoor heat exchanger, the same indoor heat exchanger is used as a refrigerant receiver tank, and the amount of refrigerant in the refrigerant circuit is adjusted.
【００１１】また、前記室内機の一方を冷房または暖房
運転し、他方を停止した際、停止側の室内熱交換器の温
度が所定値以上で、且つ所定値回数以上繰り返した場
合、前記停止側の室内熱交換器の冷媒の下流側の開閉弁
を開く構成となっている。When one of the indoor units is operated for cooling or heating and the other is stopped, and the temperature of the indoor heat exchanger on the stop side is equal to or higher than a predetermined value and is repeated a predetermined number of times or more, the stop side is stopped. The open / close valve on the downstream side of the refrigerant of the indoor heat exchanger is opened.
【００１２】また、前記バイパス管にキャピラリチュー
ブを用いた構成となっている。Further, the bypass pipe is configured to use a capillary tube.
【００１３】また、前記開閉弁に電磁弁を用いた構成と
なっている。[0013] Further, a solenoid valve is used as the on-off valve.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態を、添
付図面に基づいた実施例として説明する。図１は、本発
明による多室形空気調和機の冷媒回路の構成を示す図で
あり、図２は、各運転モードにおける各開閉弁の開閉制
御を示す図である。図において、１は室外機、2aおよび
2bは同時または何れか一方を任意に運転できる第一室内
機と、第二室内機である。３は冷媒を圧縮し高温高圧の
ガスにする圧縮機、４は冷媒の流れる方向を変えて冷房
運転と暖房運転等の切り換えを行う四方弁、５は冷房運
転時に凝縮器、暖房運転時に蒸発器として機能する室外
熱交換器、７は冷媒の流れを抑え減圧する膨張弁であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below as examples based on the attached drawings. FIG. 1 is a diagram illustrating a configuration of a refrigerant circuit of a multi-room air conditioner according to the present invention, and FIG. 2 is a diagram illustrating opening / closing control of each on-off valve in each operation mode. In the figure, 1 is an outdoor unit, 2a and
Reference numeral 2b denotes a first indoor unit and a second indoor unit that can be simultaneously or arbitrarily operated. Reference numeral 3 denotes a compressor that compresses the refrigerant into a high-temperature and high-pressure gas. 4 denotes a four-way valve that changes the direction of flow of the refrigerant to switch between a cooling operation and a heating operation. 5 denotes a condenser during the cooling operation and an evaporator during the heating operation. The outdoor heat exchanger 7 functioning as an expansion valve controls the flow of the refrigerant to reduce the pressure.
【００１５】6aおよび6bは冷房運転時に蒸発器、暖房運
転時に凝縮器として機能し、前記第一室内機2aおよび第
二室内機2bにそれぞれ搭載された第一室内熱交換器と第
二室内熱交換器である。6a and 6b function as an evaporator during the cooling operation and as a condenser during the heating operation. The first indoor heat exchanger and the second indoor heat exchanger mounted on the first indoor unit 2a and the second indoor unit 2b, respectively. It is an exchanger.
【００１６】８は前記室外機１と前記第一室内機2aおよ
び第二室内機2b間に設けられ、冷媒を分配する冷媒分配
ユニットである。同冷媒分配ユニット８には電磁弁から
なる第一開閉弁９、第二開閉弁10、第三開閉弁11および
第四開閉弁12が配設され、前記四方弁４および前記膨張
弁７に対し、前記第一室内熱交換器6aおよび前記第二室
内熱交換器とを、前記各開閉弁を介して並列接続する構
成となっている。A refrigerant distribution unit 8 is provided between the outdoor unit 1 and the first indoor unit 2a and the second indoor unit 2b and distributes refrigerant. The refrigerant distribution unit 8 is provided with a first opening / closing valve 9, a second opening / closing valve 10, a third opening / closing valve 11, and a fourth opening / closing valve 12, which are electromagnetic valves. The first indoor heat exchanger 6a and the second indoor heat exchanger are connected in parallel via the respective on-off valves.
【００１７】前記膨張弁７と前記第一室内熱交換器6aの
一方との間に前記第一開閉弁９を接続するとともに、前
記第一室内熱交換器6aの他方と前記四方弁４との間に前
記第二開閉弁10を接続し、前記膨張弁７と前記第二室内
熱交換器6bの一方との間に前記第三開閉弁11を接続する
一方、前記第二室内熱交換器6bの他方と前記四方弁４と
の間に前記第四開閉弁を接続し、前記第一開閉弁９と前
記第一室内熱交換器6aとの接続部ａと、前記第三開閉弁
11と前記第二室内熱交換器6bとの接続部ｂ間に、前記冷
媒分配ユニット８内に配設されるバイパス管13を設け、
冷凍サイクルを形成した構成となっている。このため、
室外機と室内機が１対１のシングル型のスプリット型エ
アコンでも新たに随時室内機を増設することが可能とな
る。The first on-off valve 9 is connected between the expansion valve 7 and one of the first indoor heat exchangers 6a, and the other of the first indoor heat exchanger 6a and the four-way valve 4 are connected to each other. The second open / close valve 10 is connected between the second indoor heat exchanger 6b and the third open / close valve 11 is connected between the expansion valve 7 and one of the second indoor heat exchangers 6b. The fourth open / close valve is connected between the other end of the fourth open / close valve and the four-way valve 4, a connection portion a between the first open / close valve 9 and the first indoor heat exchanger 6a, and the third open / close valve
Between the connecting portion b of the 11 and the second indoor heat exchanger 6b, provided a bypass pipe 13 disposed in the refrigerant distribution unit 8,
It has a configuration in which a refrigeration cycle is formed. For this reason,
Even with a single split type air conditioner having one outdoor unit and one indoor unit, it is possible to newly add an indoor unit as needed.
【００１８】上記構成において、冷媒回路の動作につい
て説明する。前記第一室内機2aおよび第二室内機2bと
が、冷房運転または暖房運転により同時に、且つ同一運
転モードで運転される場合、図２の制御図に示すよう
に、前記第一開閉弁９、第二開閉弁10、第三開閉弁11お
よび第四開閉弁12の全ての弁が開かれ、膨張弁７は絞り
制御される。冷房運転及び暖房運転の場合の冷媒の流れ
は従来例で示したものと同じである。In the above configuration, the operation of the refrigerant circuit will be described. When the first indoor unit 2a and the second indoor unit 2b are simultaneously operated by the cooling operation or the heating operation and in the same operation mode, as shown in the control diagram of FIG. All of the second on-off valve 10, the third on-off valve 11, and the fourth on-off valve 12 are opened, and the expansion valve 7 is throttle-controlled. The flow of the refrigerant in the cooling operation and the heating operation is the same as that shown in the conventional example.
【００１９】次に、前記第一室内機2aで冷房運転を行
い、前記第二室内機2bは停止させる場合について説明す
る。この状態においては、前記第一開閉弁９および前記
第二開閉弁10が開かれ、前記第三開閉弁11および前記第
四開閉弁が12閉じられ、膨張弁７は絞り制御される。前
記圧縮機３から吐出された高温高圧の冷媒は、図３の破
線矢印で示すように、前記四方弁４を通り前記室外熱交
換器５に至り、同室外熱交換器５で室外に熱を放出して
凝縮液化した後、前記膨張弁７の絞り制御により減圧膨
張され、前記前記第一開閉弁９を通り、前記第一室内機
2aの前記第一室内熱交換器6aに至り、同第一室内熱交換
器6aで蒸発気化して室内の熱を吸収した後、前記第二開
閉弁10を通り、前記四方弁４を経て前記圧縮機３に戻
る。Next, a case in which the first indoor unit 2a performs a cooling operation and the second indoor unit 2b is stopped will be described. In this state, the first on-off valve 9 and the second on-off valve 10 are opened, the third on-off valve 11 and the fourth on-off valve 12 are closed, and the expansion valve 7 is throttle-controlled. The high-temperature and high-pressure refrigerant discharged from the compressor 3 passes through the four-way valve 4 and reaches the outdoor heat exchanger 5 as shown by a dashed arrow in FIG. After being discharged and condensed and liquefied, the pressure is reduced and expanded by the throttle control of the expansion valve 7, passes through the first on-off valve 9, and passes through the first indoor unit.
After reaching the first indoor heat exchanger 6a of 2a, evaporating and absorbing the indoor heat in the first indoor heat exchanger 6a, it passes through the second on-off valve 10, passes through the four-way valve 4, and Return to the compressor 3.
【００２０】次に、前記第一室内機2aで暖房運転を行
い、前記第二室内機2bは停止させる場合について説明す
る。この状態においては、前記第一開閉弁９および前記
第二開閉弁10が開かれ、前記第三開閉弁11および前記第
四開閉弁が12閉じられ、膨張弁７は絞り制御される。前
記圧縮機３から吐出された高温高圧の冷媒は、図４の実
線矢印で示すように、前記四方弁４を通り前記第二開閉
弁10を経て、前記第一室内機2aの前記第一室内熱交換器
6aに至り、同第一室内熱交換器6aで室外に熱を放出して
凝縮液化した後、前記膨張弁７の絞り制御により減圧膨
張され、前記室外熱交換器５に至り、同室外熱交換器５
で蒸発気化して室外の熱を吸収した後、前記四方弁４を
通り前記圧縮機３に戻る。Next, a case where the first indoor unit 2a performs the heating operation and the second indoor unit 2b is stopped will be described. In this state, the first on-off valve 9 and the second on-off valve 10 are opened, the third on-off valve 11 and the fourth on-off valve 12 are closed, and the expansion valve 7 is throttle-controlled. The high-temperature and high-pressure refrigerant discharged from the compressor 3 passes through the four-way valve 4, passes through the second on-off valve 10, and passes through the first indoor unit 2 a of the first indoor unit 2 a, as indicated by solid arrows in FIG. 4. Heat exchanger
6a, the first indoor heat exchanger 6a releases heat to the outside of the room to condense and liquefy, and then is decompressed and expanded by the throttle control of the expansion valve 7, reaches the outdoor heat exchanger 5, and performs outdoor heat exchange. Vessel 5
After evaporating to absorb the outdoor heat, the refrigerant returns to the compressor 3 through the four-way valve 4.
【００２１】また、前記第一室内機2aを冷房運転または
暖房運転し、前記第二室内機2bを停止した際、前記第三
開閉弁11および第四開閉弁12を閉じ、冷媒を前記バイパ
ス管13を経由して前記第二室内熱交換器6bに流入させ、
同二室内熱交換器6bを冷媒のレシーバタンクとして使用
する構成とすることにより、冷媒回路内の冷媒量を効率
良く、最適になるよう調節することができる。When the first indoor unit 2a is operated for cooling or heating and the second indoor unit 2b is stopped, the third on-off valve 11 and the fourth on-off valve 12 are closed, and the refrigerant is supplied to the bypass pipe. Flowing into the second indoor heat exchanger 6b via 13;
By using the second indoor heat exchanger 6b as a refrigerant receiver tank, the amount of refrigerant in the refrigerant circuit can be adjusted efficiently and optimally.
【００２２】また、前記第二室内機2bを冷房運転または
暖房運転し、前記第一室内機2aを停止した際、前記第一
開閉弁９および第二開閉弁10を閉じ、冷媒を前記バイパ
ス管13を経由して前記第一室内熱交換器6aに流入させ、
同一室内熱交換器6aを冷媒のレシーバタンクとして使用
する構成とすることにより、冷媒回路内の冷媒量を効率
良く、最適になるよう調節することができる。When the second indoor unit 2b is operated for cooling or heating and the first indoor unit 2a is stopped, the first opening / closing valve 9 and the second opening / closing valve 10 are closed, and the refrigerant passes through the bypass pipe. Flowing into the first indoor heat exchanger 6a via 13;
By using the same indoor heat exchanger 6a as a receiver tank for the refrigerant, the amount of the refrigerant in the refrigerant circuit can be adjusted efficiently and optimally.
【００２３】また、前記第一室内機2aまたは第二室内機
2bの一方を冷房または暖房運転し、他方を停止した際、
停止側の室内熱交換器の温度が所定値以上で、且つ所定
値回数以上繰り返した場合、前記停止側の室内熱交換器
の冷媒の下流側の開閉弁を開く構成とすることにより、
停止側の室内熱交換器の圧力の以上上昇の防止、即ち、
冷媒のシャットダウン防止制御を行うことができる。The first indoor unit 2a or the second indoor unit
When one of 2b is operated for cooling or heating and the other is stopped,
When the temperature of the indoor heat exchanger on the stop side is equal to or higher than a predetermined value, and is repeated a predetermined number of times or more, by opening the on-off valve on the downstream side of the refrigerant of the indoor heat exchanger on the stop side,
Prevention of the rise in the pressure of the indoor heat exchanger on the stop side, ie,
Refrigerant shutdown prevention control can be performed.
【００２４】また、前記バイパス管にキャピラリチュー
ブを用いた構成とすることにより、室内機の一方を停止
しレシーバタンクとして使用した時、停止側の室内熱交
換器へ冷媒を効果的に流入させることができる。Further, by using a capillary tube for the bypass pipe, when one of the indoor units is stopped and used as a receiver tank, the refrigerant can effectively flow into the stopped indoor heat exchanger. Can be.
【００２５】以上説明したように、室外機と室内機を開
閉弁を備えた冷媒分配ユニット８を介して接続すること
により、一台の室外機に室内機を新たに随時増設するこ
とができるため増設コストを低減することが可能とな
る。また、一方の室内機を停止した場合、停止側の室内
熱交換器に冷媒を溜めるレシーバタンクとして使用する
ことにより、冷媒回路内の冷媒量を最適にして効率良い
運転ができる多室形空気調和機となる。As described above, since the outdoor unit and the indoor unit are connected via the refrigerant distribution unit 8 having the on-off valve, the indoor unit can be newly added to one outdoor unit as needed. It is possible to reduce the extension cost. In addition, when one indoor unit is stopped, it is used as a receiver tank for storing refrigerant in the indoor heat exchanger on the stopped side, thereby optimizing the amount of refrigerant in the refrigerant circuit and operating efficiently. Machine.
【００２６】[0026]
【発明の効果】以上のように、本発明によると、室外機
と室内機を開閉弁を備えた冷媒分配ユニットを介して接
続することにより、一台の室外機に室内機を新たに随時
増設できるため増設コストを低減することが可能とな
る。また、一方の室内機を停止した場合、停止側の室内
熱交換器に冷媒を溜めるレシーバタンクとして使用する
ことにより、冷媒回路内の冷媒量を最適にして効率良い
運転ができる多室形空気調和機となる。As described above, according to the present invention, an outdoor unit and an indoor unit are connected via a refrigerant distribution unit having an on-off valve, so that an indoor unit can be newly added to one outdoor unit as needed. Because it is possible, it is possible to reduce the extension cost. Also, when one indoor unit is stopped, it is used as a receiver tank for storing the refrigerant in the indoor heat exchanger on the stopped side, thereby optimizing the amount of refrigerant in the refrigerant circuit for efficient operation. Machine.
【図１】本発明による多室形空気調和機の冷媒回路図で
ある。FIG. 1 is a refrigerant circuit diagram of a multi-room air conditioner according to the present invention.
【図２】本発明による多室形空気調和機の各運転モード
における開閉弁および各膨張弁の開閉および絞り制御を
示す図である。FIG. 2 is a diagram showing opening / closing and throttle control of an on-off valve and each expansion valve in each operation mode of the multi-room air conditioner according to the present invention.
【図３】本発明による多室形空気調和機の一台のみ冷房
運転時の冷媒回路図である。FIG. 3 is a refrigerant circuit diagram when only one of the multi-room air conditioners according to the present invention is in a cooling operation.
【図４】本発明による多室形空気調和機の一台のみ暖房
運転時の冷媒回路図である。FIG. 4 is a refrigerant circuit diagram in a heating operation of only one of the multi-room air conditioners according to the present invention.
【図５】従来例による多室形空気調和機の冷媒回路図で
ある。FIG. 5 is a refrigerant circuit diagram of a conventional multi-room air conditioner.
１ 室外機 2a 第一室内機 2b 第二室内機 ３ 圧縮機 ４ 四方弁 ５ 室外熱交換器 6a 第一室内熱交換器 6b 第二室内熱交換器 ７ 膨張弁 ８ 冷媒分配ユニット ９ 第一開閉弁（電磁弁） 10 第二開閉弁（電磁弁） 11 第三開閉弁（電磁弁） 12 第四膨張弁 13 バイパス管 REFERENCE SIGNS LIST 1 outdoor unit 2a first indoor unit 2b second indoor unit 3 compressor 4 four-way valve 5 outdoor heat exchanger 6a first indoor heat exchanger 6b second indoor heat exchanger 7 expansion valve 8 refrigerant distribution unit 9 first on-off valve (Solenoid valve) 10 Second on-off valve (Solenoid valve) 11 Third on-off valve (Solenoid valve) 12 Fourth expansion valve 13 Bypass pipe
Claims (6)
膨張弁と、同膨張弁と前記四方弁に並列に、第一室内機
を構成する第一室内熱交換器と、第二室内機を構成する
第二室内熱交換器を接続して冷凍サイクルを形成してな
る多室形空気調和機において、 前記膨張弁および前記四方弁と、前記第一室内熱交換器
および前記第二室内熱交換器との間に、第一開閉弁、第
二開閉弁、第三開閉弁および第四開閉弁を備えた冷媒分
配ユニットを設け、前記膨張弁と前記第一室内熱交換器
間に前記第一開閉弁を接続するとともに、前記第一室内
熱交換器と前記四方弁間に前記第二開閉弁を接続し、前
記膨張弁と前記第二室内熱交換器間に前記第三開閉弁を
接続する一方、前記第二室内熱交換器と前記四方弁間に
前記第四開閉弁を接続し、前記冷媒分配ユニット内に、
前記第一開閉弁と前記第一室内熱交換器との接続部と、
前記第三開閉弁と前記第二室内熱交換器との接続部間と
を結ぶバイパス管を設け、前記第一室内機および第二室
内機を冷房運転または暖房運転に、同時あるいは何れか
一方を運転するようにしてなることを特徴とする多室形
空気調和機。1. A compressor, a four-way valve, an outdoor heat exchanger,
Expansion valve, in parallel with the expansion valve and the four-way valve, a first indoor heat exchanger constituting a first indoor unit, and a second indoor heat exchanger constituting a second indoor unit is connected to form a refrigeration cycle. In the multi-chamber air conditioner formed, between the expansion valve and the four-way valve, the first indoor heat exchanger and the second indoor heat exchanger, a first on-off valve, a second on-off valve A refrigerant distribution unit including a third on-off valve and a fourth on-off valve is provided, and the first on-off valve is connected between the expansion valve and the first indoor heat exchanger, and the first indoor heat exchanger and Connecting the second on-off valve between the four-way valves, while connecting the third on-off valve between the expansion valve and the second indoor heat exchanger, while between the second indoor heat exchanger and the four-way valve Connecting the fourth on-off valve, in the refrigerant distribution unit,
A connection portion between the first on-off valve and the first indoor heat exchanger,
Providing a bypass pipe connecting between the third on-off valve and the connection portion of the second indoor heat exchanger, the cooling operation or the heating operation of the first indoor unit and the second indoor unit at the same time or one of them A multi-room air conditioner characterized by being driven.
転し、前記第二室内機を停止した際、前記第三開閉弁お
よび第四開閉弁を閉じ、冷媒を前記バイパス管を経由し
て前記第二室内熱交換器に流入させ、同二室内熱交換器
を冷媒のレシーバタンクとして使用し、冷媒回路内の冷
媒量を調節してなることを特徴とする請求項１に記載の
多室形空気調和機。2. The cooling operation or the heating operation of the first indoor unit, and when the second indoor unit is stopped, the third on-off valve and the fourth on-off valve are closed, and the refrigerant passes through the bypass pipe. 2. The multi-chamber according to claim 1, wherein the refrigerant flows into the second indoor heat exchanger, the second indoor heat exchanger is used as a refrigerant receiver tank, and the amount of refrigerant in the refrigerant circuit is adjusted. 3. Type air conditioner.
転し、前記第一室内機を停止した際、前記第一開閉弁お
よび第二開閉弁を閉じ、冷媒を前記バイパス管を経由し
て前記第一室内熱交換器に流入させ、同一室内熱交換器
を冷媒のレシーバタンクとして使用し、冷媒回路内の冷
媒量を調節してなることを特徴とする請求項１に記載の
多室形空気調和機。3. A cooling operation or a heating operation of the second indoor unit, and when the first indoor unit is stopped, the first on-off valve and the second on-off valve are closed, and the refrigerant passes through the bypass pipe. 2. The multi-chamber type according to claim 1, wherein the refrigerant flows into the first indoor heat exchanger, uses the same indoor heat exchanger as a refrigerant receiver tank, and adjusts the amount of refrigerant in the refrigerant circuit. 3. Air conditioner.
し、他方を停止した際、停止側の室内熱交換器の温度が
所定値以上で、且つ所定値回数以上繰り返した場合、前
記停止側の室内熱交換器の冷媒の下流側の開閉弁を開い
てなることを特徴とする請求項１に記載の多室形空気調
和機。4. When one of the indoor units is operated for cooling or heating and the other is stopped, and the temperature of the indoor heat exchanger on the stop side is equal to or higher than a predetermined value and is repeated a predetermined number of times or more, the stop side is stopped. 2. The multi-room air conditioner according to claim 1, wherein the on-off valve on the downstream side of the refrigerant of the indoor heat exchanger is opened.
用いてなることを特徴とする請求項１に記載の多室形空
気調和機。5. The multi-room air conditioner according to claim 1, wherein a capillary tube is used for the bypass pipe.
を特徴とする請求項１に記載の多室形空気調和機。6. The multi-room air conditioner according to claim 1, wherein an electromagnetic valve is used for each of said on-off valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36076099A JP2001174090A (en) | 1999-12-20 | 1999-12-20 | Multiple-chamber air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36076099A JP2001174090A (en) | 1999-12-20 | 1999-12-20 | Multiple-chamber air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001174090A true JP2001174090A (en) | 2001-06-29 |
Family
ID=18470807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36076099A Pending JP2001174090A (en) | 1999-12-20 | 1999-12-20 | Multiple-chamber air-conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001174090A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018049722A1 (en) * | 2016-09-19 | 2018-03-22 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and switching control method for operating mode of indoor units thereof |
| CN111706959A (en) * | 2020-06-15 | 2020-09-25 | 青岛海尔空调器有限总公司 | Electronic expansion valve fault detection method and device for multi-split air conditioner and air conditioner |
| WO2020261411A1 (en) * | 2019-06-26 | 2020-12-30 | 三菱電機株式会社 | Air conditioner |
| CN116358182A (en) * | 2023-02-28 | 2023-06-30 | 珠海格力电器股份有限公司 | Cold and warm combined supply system and control method |
-
1999
- 1999-12-20 JP JP36076099A patent/JP2001174090A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018049722A1 (en) * | 2016-09-19 | 2018-03-22 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and switching control method for operating mode of indoor units thereof |
| WO2020261411A1 (en) * | 2019-06-26 | 2020-12-30 | 三菱電機株式会社 | Air conditioner |
| CN111706959A (en) * | 2020-06-15 | 2020-09-25 | 青岛海尔空调器有限总公司 | Electronic expansion valve fault detection method and device for multi-split air conditioner and air conditioner |
| WO2021223778A1 (en) * | 2020-06-15 | 2021-11-11 | 青岛海尔空调器有限总公司 | Electronic expansion valve failure detection method and device for multi-split air conditioner, and air conditioner |
| CN116358182A (en) * | 2023-02-28 | 2023-06-30 | 珠海格力电器股份有限公司 | Cold and warm combined supply system and control method |
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