JP4391261B2 - Air conditioner - Google Patents

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JP4391261B2
JP4391261B2 JP2004030257A JP2004030257A JP4391261B2 JP 4391261 B2 JP4391261 B2 JP 4391261B2 JP 2004030257 A JP2004030257 A JP 2004030257A JP 2004030257 A JP2004030257 A JP 2004030257A JP 4391261 B2 JP4391261 B2 JP 4391261B2
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indoor unit
unit
heat exchanger
valve
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JP2005221167A (en
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雅史 冨田
英治 福島
和樹 岡田
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Mitsubishi Electric Corp
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Description

本発明は、空気調和装置に関し、特に室内機の熱交換器の開閉弁の開閉に関するものである。   The present invention relates to an air conditioner, and more particularly to opening and closing of an on-off valve of a heat exchanger of an indoor unit.

従来の空気調和装置は、例えば、１台の室外機と複数台の室内機からなり、これらは、圧縮機、四方弁、室外熱交換器、暖房用膨張弁、電磁弁、レシーバ、室内熱交換器及びインバータ制御可能な制御装置等から構成されている。そして、運転室内機の冷媒回路に設置された電磁弁を開、停止室内機の冷媒回路に設置された電磁弁を閉にすることで、運転室内機の台数を決定し、インバータ制御により圧縮機の運転周波数を制御し、運転中の室内機に流れる冷媒を適切な量にすることで、各室内機に適切な冷房運転及び暖房運転を行わせることができる。 A conventional air conditioner includes, for example, one outdoor unit and a plurality of indoor units. These include a compressor, a four-way valve, an outdoor heat exchanger, a heating expansion valve, a solenoid valve, a receiver, and an indoor heat exchange. And a control device capable of inverter control. Then, by opening the solenoid valve installed in the refrigerant circuit of the operating indoor unit and closing the solenoid valve installed in the refrigerant circuit of the stopped indoor unit, the number of operating indoor units is determined, and the compressor is controlled by inverter control. By controlling the operation frequency of this and making the amount of refrigerant flowing through the operating indoor unit to be an appropriate amount, it is possible to cause each indoor unit to perform appropriate cooling operation and heating operation.

上記のように構成された空気調和装置においては、運転室内機の数により循環冷媒量を決定し、冷房運転および暖房運転を行っている。そして、運転中の室内機の一部を停止させると、停止させた室内機の電磁弁は開いた状態になっているとみなされる。（例えば、特許文献１参照）。
特開昭６１−１１５４０号公報（２頁〜４頁、図１〜図３） In the air conditioner configured as described above, the amount of circulating refrigerant is determined based on the number of operating indoor units, and cooling operation and heating operation are performed. When a part of the operating indoor unit is stopped, the solenoid valve of the stopped indoor unit is considered to be in an open state. (For example, refer to Patent Document 1).
Japanese Patent Application Laid-Open No. 61-11540 (pages 2 to 4, FIGS. 1 to 3)

上記のように、従来の空気調和装置においては、運転中の室内機の一部を停止させると、停止させた室内機の電磁弁は開いた状態になっているとみなされるため、運転室内機に冷媒が流れるとともに、停止させた室内機にも冷媒は流れ、溜まり込んでしまう。この時、停止室内機に溜まり込んだ冷媒が室内の空気と熱交換を行うことで、室内機が凍結してしまうことや、停止室内機に冷媒が溜まり込むことによりインバータ制御であっても運転室内機内を循環する冷媒量が不足する場合が生じ、適切な冷房能力及び暖房能力が得られないことが生じた。
本発明はこのような問題を解決するためになされたもので、運転中の室内機が運転停止しても冷媒の溜まり込むことのない空気調和装置を提供することを目的とする。 As described above, in the conventional air conditioner, when a part of the operating indoor unit is stopped, it is considered that the solenoid valve of the stopped indoor unit is in an open state. As the refrigerant flows, the refrigerant also flows and accumulates in the stopped indoor unit. At this time, the refrigerant accumulated in the stopped indoor unit exchanges heat with the indoor air, so that the indoor unit freezes, or the refrigerant accumulates in the stopped indoor unit, so that the operation can be performed even in the inverter control. In some cases, the amount of refrigerant circulating in the indoor unit is insufficient, and appropriate cooling capacity and heating capacity cannot be obtained.
The present invention has been made to solve such a problem, and an object of the present invention is to provide an air conditioner in which refrigerant does not accumulate even when an operating indoor unit is stopped.

本発明に係る空気調和装置は、圧縮機及び室外熱交換器を備えた室外機、及び該室外機に並列に接続され、それぞれ室内熱交換器を備えた複数の室内機を有し、また、室内機の室内熱交換器の前後の配管に開閉弁を設け、開閉弁を、室内機と室外機との配管接続部に設置した電磁弁キットに内蔵し、さらに、室内機は、複数の室内機が同時に運転可能であるとともに、少なくとも１つの室内機の運転停止時は、停止する室内機の出入り口に設けられた開閉弁を閉じ、圧縮機は、インバータ制御により能力可変のものであり、運転室内機の室内熱交換器の熱交換能力に応じて圧縮機の能力を可変とし、冷媒回路の絞り装置は室外機にあるものである。 An air conditioner according to the present invention includes an outdoor unit including a compressor and an outdoor heat exchanger, and a plurality of indoor units connected to the outdoor unit in parallel, each including an indoor heat exchanger. An open / close valve is provided in the pipe before and after the indoor heat exchanger of the indoor unit, and the open / close valve is built in the solenoid valve kit installed at the pipe connection part between the indoor unit and the outdoor unit. The machine can be operated at the same time, and when the operation of at least one indoor unit is stopped, the on- off valve provided at the inlet / outlet of the indoor unit to be stopped is closed , and the compressor has a variable capacity by inverter control. the capacity of the compressor is variable depending on the heat exchange capacity of the indoor heat exchanger of the indoor unit, the iris of the refrigerant circuit is shall near the outdoor unit.

本発明に係る空気調和装置においては、室内機が運転停止時は電磁弁を閉じるので、停止室内機に冷媒が溜まり込むことがなく、停止室内機の凍結や冷媒不足により、適切な冷房能力及び暖房能力が得られないということが防止できる。
また、圧縮機は、インバータ制御により能力可変のものであり、運転室内機の室内熱交換器の熱交換能力に応じて圧縮機の能力を可変としたので、運転中の室内機の台数にあった又は運転中の室内機の室内熱交換器の熱交換能力にあった量の冷媒を循環させ適切な冷房運転および暖房運転を行い、快適な室内温度を保つことができる。 In the air conditioner according to the present invention, since the indoor unit closes the solenoid valve when the operation is stopped, the refrigerant does not accumulate in the stopped indoor unit, and the appropriate cooling capacity and It is possible to prevent the heating capacity from being obtained.
In addition, the capacity of the compressor is variable by inverter control, and the capacity of the compressor is variable according to the heat exchange capacity of the indoor heat exchanger of the operating indoor unit. Alternatively, an appropriate cooling operation and heating operation can be performed by circulating an amount of refrigerant suitable for the heat exchange capability of the indoor heat exchanger of the operating indoor unit, and a comfortable indoor temperature can be maintained.

実施の形態１．
図１は、実施の形態１の空気調和装置の冷媒循環サイクルを示す概略図である。
図において、２台の室内機Ａ、Ｂは、それぞれ、室内熱交換器７ａ、７ｂを有し、室外機Ｃは、圧縮機１、四方弁２、室外熱交換器３、電子膨張弁４、レシーバ５、電子膨張弁６を有する。そして、１台の室外機Ｃに対して、２台の室内機Ａ、Ｂを並列に配管接続する。また、室外機Ｃと室内機Ａ、Ｂとの２箇所の配管接続部には、それぞれ、電磁弁キット１０、１１を配管接続する。即ち、室外機Ｃと室内機Ａ、Ｂとは、電磁弁キット１０または電磁弁キット１１を介して接続する。電磁弁キット１０、１１は、それぞれ、電磁弁８ａと８ｂ、９ａと９ｂを有し、これらの電磁弁は、室内機Ａ、Ｂのそれぞれの室内熱交換器７ａ、７ｂに、室内熱交換器７ａに電磁弁８ａと電磁弁９ａがつながり、また室内熱交換器７ｂに電磁弁８ｂと電磁弁９ｂがつながるように接続する。
また、制御装置が、室内機Ａ、Ｂの運転状態に応じて、これらの電磁弁８ａ、８ｂ、９ａ、９ｂの開閉を制御する。 Embodiment 1 FIG.
1 is a schematic diagram illustrating a refrigerant circulation cycle of the air-conditioning apparatus according to Embodiment 1. FIG.
In the figure, two indoor units A and B have indoor heat exchangers 7a and 7b, respectively, and the outdoor unit C includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an electronic expansion valve 4, It has a receiver 5 and an electronic expansion valve 6. Then, two indoor units A and B are connected in parallel to one outdoor unit C. In addition, the solenoid valve kits 10 and 11 are piped to two pipe connection portions of the outdoor unit C and the indoor units A and B, respectively. That is, the outdoor unit C and the indoor units A and B are connected via the electromagnetic valve kit 10 or the electromagnetic valve kit 11. The solenoid valve kits 10 and 11 have solenoid valves 8a and 8b and 9a and 9b, respectively. These solenoid valves are connected to the indoor heat exchangers 7a and 7b of the indoor units A and B, respectively. The solenoid valve 8a and the solenoid valve 9a are connected to 7a, and the solenoid valve 8b and the solenoid valve 9b are connected to the indoor heat exchanger 7b.
Further, the control device controls the opening / closing of the electromagnetic valves 8a, 8b, 9a, 9b in accordance with the operating state of the indoor units A, B.

このような冷凍サイクルの動作を説明する。
冷房運転時は、図１の点線矢印に示すように冷媒が流れる。圧縮機１で圧縮されたガス冷媒が四方弁２を通り、室外熱交換器３に入る。室外熱交換器３でガス冷媒は外気と熱交換されて液冷媒になり電子膨張弁４に入る。電子膨張弁４に入った冷媒は減圧されニ相冷媒となりレシーバ５に入る。ニ相冷媒はレシーバ５を通過し、電子膨張弁６を通りさらに減圧される。そして、室外機Ｃと室内機Ａ、Ｂの間に設置された電磁弁キット１０内にある電磁弁８ａ、電磁弁８ｂを通り、それぞれ、室内機Ａ、室内機Ｂに冷媒は流れて行く。室内機Ａ、室内機Ｂに流れた冷媒は、それぞれ、室内熱交換器７ａ、室内熱交換器７ｂにいたる。室内熱交換器７ａ、室内熱交換器７ｂで、それぞれ、室内の空気と熱交換を行うことで蒸発し、それぞれ、電磁弁キット１１内に設置された電磁弁９ａ、電磁弁９ｂを通り、ガス冷媒は再び室外機Ｃに入り、圧縮機１で冷媒は再び圧縮される。 The operation of such a refrigeration cycle will be described.
During the cooling operation, the refrigerant flows as shown by the dotted arrows in FIG. The gas refrigerant compressed by the compressor 1 passes through the four-way valve 2 and enters the outdoor heat exchanger 3. In the outdoor heat exchanger 3, the gas refrigerant exchanges heat with the outside air to become a liquid refrigerant and enters the electronic expansion valve 4. The refrigerant that has entered the electronic expansion valve 4 is reduced in pressure to become a two-phase refrigerant and enters the receiver 5. The two-phase refrigerant passes through the receiver 5, passes through the electronic expansion valve 6, and is further decompressed. Then, the refrigerant flows into the indoor unit A and the indoor unit B through the electromagnetic valve 8a and the electromagnetic valve 8b in the electromagnetic valve kit 10 installed between the outdoor unit C and the indoor units A and B, respectively. The refrigerant that has flowed into the indoor unit A and the indoor unit B reaches the indoor heat exchanger 7a and the indoor heat exchanger 7b, respectively. Each of the indoor heat exchanger 7a and the indoor heat exchanger 7b evaporates by exchanging heat with indoor air, and passes through the electromagnetic valve 9a and the electromagnetic valve 9b installed in the electromagnetic valve kit 11, respectively. The refrigerant again enters the outdoor unit C, and the refrigerant is compressed again by the compressor 1.

次に、暖房運転について説明を行う。冷房運転と同様に圧縮機１により圧縮されたガス冷媒は四方弁２によって冷房運転の逆方向に流れる（図１の実線に示す）。そして電磁弁キット１１内の電磁弁９ａ、９ｂを通り、室内熱交換器７ａ、７ｂで熱交換され液冷媒となり電磁弁キット１０内の電磁弁８ａ、８ｂを通過し、室外機Ｃに入る。そして、電子膨張弁６により減圧されニ相冷媒となり、レシーバ５、電子膨張弁４を通過して室外熱交換器３により外気と熱交換が行われガス冷媒となり再び圧縮機１により圧縮される。   Next, the heating operation will be described. As in the cooling operation, the gas refrigerant compressed by the compressor 1 flows in the reverse direction of the cooling operation by the four-way valve 2 (shown by a solid line in FIG. 1). Then, it passes through the electromagnetic valves 9a and 9b in the electromagnetic valve kit 11, passes through the electromagnetic valves 8a and 8b in the electromagnetic valve kit 10 through heat exchange in the indoor heat exchangers 7a and 7b, and enters the outdoor unit C. The pressure is reduced by the electronic expansion valve 6 to become a two-phase refrigerant, passes through the receiver 5 and the electronic expansion valve 4, exchanges heat with the outside air by the outdoor heat exchanger 3, becomes a gas refrigerant, and is compressed again by the compressor 1.

これらの冷房運転、暖房運転において、室内機Ａの運転を停止する場合は、室内機Ａの前後の電磁サーキット１０の電磁弁８ａ及び電磁サーキット１１の電磁弁９ａを制御装置の制御により、開いた状態から閉じる。また、室内機Ｂの運転を停止する場合も、同様に室内機Ｂの前後の電磁サーキット１０の電磁弁８ｂ及び電磁サーキット１１の電磁弁９ｂを制御装置の制御により、開いた状態から閉じる。このように、室内機Ａ、Ｂの運転を停止する場合は、前後の電磁弁を閉じるので、室内機Ａ、Ｂ（熱交換器７ａ、７ｂ）に冷媒が溜まり込むことを防止できる。即ち、複数の室内機（室内機Ａ、Ｂ）を同時に運転中に、停止する室内機（室内機Ａ又は室内機Ｂ）の前後の電磁弁は閉じるので、電磁弁を開としたままのように、停止室内機（室内機Ａ又は室内機Ｂ）にも冷媒が流れ、溜まり込んでしまうことがなく、また、室内機（室内機Ａ又は室内機Ｂ）が凍結してしまうこともない。
また、制御装置により、運転停止の室内機の前後の電磁弁（即ち、室内機の室内熱交換器の前後の配管に設けた電磁弁）を閉じることにより、１台の室外機１に複数台の室内機Ａ、Ｂを持つ空気調和装置においても各室内機を個別に運転することが可能になる。 In the cooling operation and the heating operation, when stopping the operation of the indoor unit A, the electromagnetic valve 8a of the electromagnetic circuit 10 before and after the indoor unit A and the electromagnetic valve 9a of the electromagnetic circuit 11 are opened by the control of the control device. Close from state. Similarly, when the operation of the indoor unit B is stopped, the electromagnetic valve 8b of the electromagnetic circuit 10 and the electromagnetic valve 9b of the electromagnetic circuit 11 before and after the indoor unit B are closed from the opened state by the control of the control device. Thus, when stopping the operation of the indoor units A and B, the front and rear solenoid valves are closed, so that the refrigerant can be prevented from being accumulated in the indoor units A and B (heat exchangers 7a and 7b). That is, while the plurality of indoor units (indoor units A and B) are simultaneously operated, the solenoid valves before and after the indoor unit to be stopped (indoor unit A or indoor unit B) are closed, so that the solenoid valves remain open. In addition, the refrigerant does not flow and accumulate in the stopped indoor unit (indoor unit A or indoor unit B), and the indoor unit (indoor unit A or indoor unit B) does not freeze.
Further, the control device closes the solenoid valves before and after the shutdown indoor unit (that is, the solenoid valves provided in the pipes before and after the indoor heat exchanger of the indoor unit), so that a plurality of units are provided in one outdoor unit 1. In the air conditioner having the indoor units A and B, each indoor unit can be operated individually.

また、圧縮機１をインバータ制御により能力可変の圧縮機とし、制御装置により圧縮機１の周波数を制御することで運転中の室内機Ａ、Ｂの台数にあった又は運転中の室内機Ａ、Ｂの室内熱交換器７ａ、７ｂの熱交換能力にあった量の冷媒を循環させ適切な冷房運転および暖房運転を行い、快適な室内温度を保つことができる。   Further, the compressor 1 is a variable capacity compressor by inverter control, and the control unit controls the frequency of the compressor 1 to match the number of indoor units A and B in operation or the indoor unit A in operation. It is possible to maintain a comfortable indoor temperature by circulating an amount of refrigerant suitable for the heat exchange capacity of the indoor heat exchangers 7a and 7b of B and performing appropriate cooling and heating operations.

また、室外機Ｃと室内機Ａ、Ｂの間に電磁弁キット１０、１１を接続するため、既存の空気調和装置にも設置することができる。さらに、複数の電磁弁を電磁弁キット１０、１１内にまとめて内蔵させるので、電磁弁の設置が容易となる。   Moreover, since the solenoid valve kits 10 and 11 are connected between the outdoor unit C and the indoor units A and B, they can be installed in an existing air conditioner. Furthermore, since a plurality of solenoid valves are integrated in the solenoid valve kits 10 and 11, installation of the solenoid valves is facilitated.

本発明の実施の形態では、１台の室外機Ｃに対して、２台の室内機Ａ、Ｂを接続しているが、これに限らず、１台の室外機Ｃに対して、１台の室内機または３台以上の室内機を接続し、室内機の前後に電磁弁を設置してもよく、効果も同様である。
また、電磁弁は、電磁サーキット１０、１１としてまとめなくても、電磁弁８ａ、８ｂ及び電磁弁９ａ、９ｂを、それぞれ、室外機Ｃと室内機Ａ、Ｂとの間の配管接続部に接続しても、停止室内機への冷媒の溜まり込みは防止でき、また、既存の空気調和装置にも設置することができる。 In the embodiment of the present invention, two indoor units A and B are connected to one outdoor unit C. However, the present invention is not limited to this, and one outdoor unit C is connected to one outdoor unit C. The indoor unit or three or more indoor units may be connected, and electromagnetic valves may be installed before and after the indoor unit, and the effect is the same.
Further, even if the electromagnetic valves are not combined as the electromagnetic circuits 10 and 11, the electromagnetic valves 8a and 8b and the electromagnetic valves 9a and 9b are connected to the pipe connection portions between the outdoor unit C and the indoor units A and B, respectively. Even so, accumulation of the refrigerant in the stop indoor unit can be prevented, and it can also be installed in an existing air conditioner.

本実施の形態の空気調和装置は、圧縮機１及び室外熱交換器３を備えた室外機Ｃ、及び該室外機Ｃに接続され、室内熱交換器７ａ、（７ｂ）を備えた１台の室内機Ａ（Ｂ）を有し、また、室内機Ａ（Ｂ）の室内熱交換器７ａ、（７ｂ）の前後の配管に開閉弁８ａ、９ａ（８ｂ、９ｂ）を設け、さらに、室内機Ａ（Ｂ）は、運転停止時は、開閉弁８ａ、９ａ（８ｂ、９ｂ）を閉じるようにしてもよく、このようにすれば、１台の室内機Ａ（Ｂ）の場合も、室内機Ａ（Ｂ）停止時に冷媒が溜まり込むことがなく、停止室内機Ａ（Ｂ）の凍結や冷媒不足により、適切な冷房能力及び暖房能力が得られないということが防止できる。   The air conditioner of the present embodiment is connected to the outdoor unit C including the compressor 1 and the outdoor heat exchanger 3, and one outdoor unit connected to the outdoor unit C and including the indoor heat exchangers 7a and (7b). The indoor unit A (B) is provided, and on-off valves 8a and 9a (8b and 9b) are provided on the pipes before and after the indoor heat exchangers 7a and (7b) of the indoor unit A (B). A (B) may close the on-off valves 8a, 9a (8b, 9b) when the operation is stopped. In this way, even in the case of one indoor unit A (B), the indoor unit The refrigerant does not accumulate when A (B) is stopped, and it is possible to prevent appropriate cooling and heating capabilities from being obtained due to freezing of the stop indoor unit A (B) or lack of refrigerant.

また、本実施の形態の空気調和装置は、開閉弁８ａ、９ａ、８ｂ、９ｂを、室内機Ａ、Ｂと室外機Ｃとの配管接続部に設置したので、既存の空気調和装置にも設置することができる。   In the air conditioner of the present embodiment, the on-off valves 8a, 9a, 8b, and 9b are installed in the pipe connection portion between the indoor units A and B and the outdoor unit C, and therefore installed in the existing air conditioner. can do.

また、本実施の形態の空気調和装置は、開閉弁８ａ、９ａ、８ｂ、９ｂを、室内機Ａ、Ｂと室外機Ｃとの配管接続部に設置した電磁弁キット１０、１１に内蔵したので、既存の空気調和装置に容易に設置できる。。   In the air conditioner of the present embodiment, the on-off valves 8a, 9a, 8b, and 9b are built in the electromagnetic valve kits 10 and 11 that are installed at the pipe connection between the indoor units A and B and the outdoor unit C. It can be easily installed in existing air conditioners. .

また、本実施の形態の空気調和装置は、圧縮機１はインバータ制御により能力可変のものであり、運転室内機Ａ、Ｂの室内熱交換器７ａ、７ｂの熱交換能力に応じて圧縮機１の能力を可変としたので、空気調和装置の出力が運転室内熱交換器７ａ、７ｂの熱交換能力に応じたものとなり、圧縮機能力を過剰とすることがない。   Further, in the air conditioner of the present embodiment, the compressor 1 has a variable capacity by inverter control, and the compressor 1 according to the heat exchange capacity of the indoor heat exchangers 7a and 7b of the operating indoor units A and B. Since the capacity of the air conditioner is made variable, the output of the air conditioner corresponds to the heat exchange capacity of the cab heat exchangers 7a and 7b, and the compression function force is not excessive.

実施の形態２．
図２は、実施の形態２の空気調和装置の冷媒循環サイクルを示す概略図である。
本実施の形態においては、室内機Ａ内で、室内熱交換器７ａの前後の配管に電磁弁１２ａ、１３ａを設置し、また、室内機Ｂ内で、室内熱交換器７ｂの前後の配管に電磁弁１２ｂ、１３ｂを設置する。その他の構成は、実施の形態１と同様である。また、制御装置による電磁弁の開閉制御及びそれによる効果も同様である。
電磁弁８ａ、８ｂ、９ａ、９ｂを室内機Ａ、Ｂ内に設けることにより、室内機の冷凍サイクルへの増設、取り外し、交換が電磁弁付きの室内機として行うことができ容易となる。即ち、室内機ごとの取付け、取外しが容易となる。 Embodiment 2. FIG.
FIG. 2 is a schematic diagram illustrating a refrigerant circulation cycle of the air-conditioning apparatus according to Embodiment 2.
In the present embodiment, electromagnetic valves 12a and 13a are installed in the indoor unit A in the piping before and after the indoor heat exchanger 7a, and in the indoor unit B, in the piping before and after the indoor heat exchanger 7b. Solenoid valves 12b and 13b are installed. Other configurations are the same as those in the first embodiment. The same applies to the opening / closing control of the solenoid valve by the control device and the effect thereof.
By providing the electromagnetic valves 8a, 8b, 9a, and 9b in the indoor units A and B, expansion, removal, and replacement of the indoor units with respect to the refrigeration cycle can be easily performed as an indoor unit with a solenoid valve. That is, attachment and removal for each indoor unit are facilitated.

実施の形態１、２において、電磁弁８ａ、８ｂ、９ａ、９ｂの代りに公知の開閉弁を使用してもよい。要するに、制御装置の制御で配管に冷媒を流したり、流れを止めることができるものであればよく、同様の効果が得られる。
また、室内機Ａ、Ｂ内の室内熱交換器７ａ、７ｂは、図１、２に示すように１台とは限らず、複数台を直列又は並列に接続したものでもよい。その場合の室内機Ａ、Ｂ停止時に閉じる開閉弁は、複数台の全てが冷凍サイクル回路から遮断するものとする。
また、室外機Ｃの室外熱交換器３も、図１、２に示すように１台とは限らず、複数台を直列又は並列に接続したものでもよい。 In the first and second embodiments, a known on-off valve may be used instead of the electromagnetic valves 8a, 8b, 9a, 9b. In short, any refrigerant can be used as long as the refrigerant can flow through the pipe or can be stopped by the control of the control device, and the same effect can be obtained.
In addition, the indoor heat exchangers 7a and 7b in the indoor units A and B are not limited to one as shown in FIGS. 1 and 2, but may be a plurality of units connected in series or in parallel. In this case, all of the on-off valves that are closed when the indoor units A and B are stopped are cut off from the refrigeration cycle circuit.
Moreover, the outdoor heat exchanger 3 of the outdoor unit C is not limited to one as shown in FIGS. 1 and 2, and a plurality of the outdoor heat exchangers 3 may be connected in series or in parallel.

本発明の空気調和装置は、部屋の空調用に利用される。   The air conditioning apparatus of the present invention is used for air conditioning in a room.

本発明の実施の形態１の空気調和装置の冷媒循環サイクルを示す概略図である。It is the schematic which shows the refrigerant | coolant circulation cycle of the air conditioning apparatus of Embodiment 1 of this invention. 本発明の実施の形態２の空気調和装置の冷媒循環サイクルを示す概略図である。It is the schematic which shows the refrigerant | coolant circulation cycle of the air conditioning apparatus of Embodiment 2 of this invention.

符号の説明Explanation of symbols

１ 圧縮機、３ 室外熱交換器、７ａ、７ｂ 室内熱交換器、８ａ、８ｂ、９ａ、９ｂ 開閉弁、１０、１１ 電磁弁キット、Ａ、Ｂ 室内機、Ｃ 室外機。
DESCRIPTION OF SYMBOLS 1 Compressor, 3 Outdoor heat exchanger, 7a, 7b Indoor heat exchanger, 8a, 8b, 9a, 9b On-off valve, 10, 11 Solenoid valve kit, A, B indoor unit, C Outdoor unit.

Claims (2)

圧縮機及び室外熱交換器を備えた室外機、及び該室外機に並列に接続され、それぞれ室内熱交換器を備えた複数の室内機を有し、
また、前記室内機の前記室内熱交換器の前後の配管に開閉弁を設け、
前記開閉弁を、前記室内機と前記室外機との配管接続部に設置した電磁弁キットに内蔵し、
さらに、前記室内機は、複数の室内機が同時に運転可能であるとともに、少なくとも１つの室内機の運転停止時は、停止する室内機の出入り口に設けられた開閉弁を閉じ、前記圧縮機は、インバータ制御により能力可変のものであり、運転室内機の室内熱交換器の熱交換能力に応じて前記圧縮機の能力を可変とし、冷媒回路の絞り装置は室外機にあることを特徴とする空気調和装置。 An outdoor unit provided with a compressor and an outdoor heat exchanger, and a plurality of indoor units connected to the outdoor unit in parallel, each having an indoor heat exchanger;
In addition, an open / close valve is provided in the pipe before and after the indoor heat exchanger of the indoor unit,
The on-off valve is built in a solenoid valve kit installed at a pipe connection between the indoor unit and the outdoor unit,
Further, the indoor unit is capable of simultaneously operating a plurality of indoor units, and when the operation of at least one indoor unit is stopped, an on- off valve provided at an entrance / exit of the indoor unit to be stopped is closed , and the compressor is is of variable capacity by inverter control, the ability of the compressor is variable depending on the heat exchange capacity of the indoor heat exchanger operating indoor unit, the iris of the refrigerant circuit is characterized by outdoor unit near Rukoto Air conditioner. 圧縮機及び室外熱交換器を備えた室外機、及び該室外機に接続され、室内熱交換器を備えた１台の室内機を有し、
また、前記室内機の前記室内熱交換器の前後の配管に開閉弁を設け、
前記開閉弁を、前記室内機と前記室外機との配管接続部に設置した電磁弁キットに内蔵し、
さらに、前記室内機の運転停止時は、前記室内機の出入り口に設けられた開閉弁を閉じ、前記圧縮機は、インバータ制御により能力可変のものであり、運転室内機の室内熱交換器の熱交換能力に応じて前記圧縮機の能力を可変とし、冷媒回路の絞り装置は室外機にあることを特徴とする空気調和装置。 An outdoor unit provided with a compressor and an outdoor heat exchanger, and one indoor unit connected to the outdoor unit and provided with an indoor heat exchanger;
In addition, an open / close valve is provided in the pipe before and after the indoor heat exchanger of the indoor unit,
The on-off valve is built in a solenoid valve kit installed at a pipe connection between the indoor unit and the outdoor unit,
Further, when the operation of the indoor unit is stopped, the on- off valve provided at the entrance / exit of the indoor unit is closed , and the compressor has variable capacity by inverter control, and the heat of the indoor heat exchanger of the operating indoor unit the ability of the compressor in accordance with the exchange capability is variable, the iris of the refrigerant circuit is an air conditioner, wherein the outdoor unit near Rukoto.
JP2004030257A 2004-02-06 2004-02-06 Air conditioner Expired - Fee Related JP4391261B2 (en)

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