JPH0484079A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH0484079A JPH0484079A JP2196321A JP19632190A JPH0484079A JP H0484079 A JPH0484079 A JP H0484079A JP 2196321 A JP2196321 A JP 2196321A JP 19632190 A JP19632190 A JP 19632190A JP H0484079 A JPH0484079 A JP H0484079A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- refrigerant
- indoor
- indoor unit
- heating
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 claims abstract description 88
- 239000003507 refrigerant Substances 0.000 claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims description 58
- 241000122133 Panicum mosaic virus Species 0.000 abstract description 6
- 238000004378 air conditioning Methods 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract 4
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的コ
（産業上の利用分野）
この発明は、複数の室内ユニットを有するマルチタイプ
の空気調和機に関する。DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Industrial Application Field) This invention relates to a multi-type air conditioner having a plurality of indoor units.
（従来の技術）
一般に、複数の室内ユニットを有するマルチタイプの空
気調和機としては、各室内ユニットにおいて冷房と暖房
の同時運転を可能とするものがある。−例を第７図に示
す。(Prior Art) Generally, as a multi-type air conditioner having a plurality of indoor units, there is one that allows simultaneous operation of cooling and heating in each indoor unit. - An example is shown in FIG.
Ａは室外ユニットで、この室外ユニットＡに冷媒切換ユ
ニットＢを介して複数の室内ユニットＣ１，Ｃ２，Ｃ３
が接続されている。A is an outdoor unit, and a plurality of indoor units C1, C2, C3 are connected to this outdoor unit A via a refrigerant switching unit B.
is connected.
まず、室外ユニットＡにおいて、１は能力可変圧縮機で
、この能力可変圧縮機１の吐出口に吐出管２が接続され
、吸入口に吸入管３が接続されている。First, in the outdoor unit A, 1 is a variable capacity compressor, a discharge pipe 2 is connected to a discharge port of the variable capacity compressor 1, and a suction pipe 3 is connected to a suction port.
吐出管２は、第１の吐出管２ａと第２の吐出管２ｂに分
岐されている。The discharge pipe 2 is branched into a first discharge pipe 2a and a second discharge pipe 2b.
吸入管３は、第１の吸入管３ａと第２の吸入管３ｂに分
岐されている。The suction pipe 3 is branched into a first suction pipe 3a and a second suction pipe 3b.
そして、吐出管２ａに二方弁４を介して室外熱交換器５
が接続され、その室外熱交換器５に暖房用膨張弁６と逆
止弁７の並列回路、リキッドタンク８、および液側管Ｗ
が順次接続されている。An outdoor heat exchanger 5 is connected to the discharge pipe 2a via a two-way valve 4.
is connected to the outdoor heat exchanger 5, a parallel circuit of a heating expansion valve 6 and a check valve 7, a liquid tank 8, and a liquid side pipe W.
are connected sequentially.
さらに、上記二方弁４と室外熱交換器５との接続部に、
三方弁９を介して上記吸入管３ａが接続されている。Furthermore, at the connection between the two-way valve 4 and the outdoor heat exchanger 5,
The suction pipe 3a is connected via a three-way valve 9.
上記液側管Ｗには、分岐ユニットＢにおける電子流量調
整弁（パルスモータバルブ；以下、ＰＭＶと略称する）
２１，３１，４１、および冷房用膨張弁２２．３２．４
２と逆止弁２３．３３゜４３の並列回路を介して、各室
内ユニットの室内熱交換器２４，３４．４４が接続され
ている。そして、室内熱交換器２４，３４．４４は、ガ
ス側管Ｇ １． Ｇ２ ＋ ０３ 、および分岐ユニッ
トＢにおける冷媒流れ方向切換用の二方弁２５．３５゜
４５を介し、上記吸入管３ｂに接続されている。The liquid side pipe W includes an electronic flow control valve (pulse motor valve; hereinafter abbreviated as PMV) in the branch unit B.
21, 31, 41, and cooling expansion valve 22.32.4
The indoor heat exchangers 24, 34, 44 of each indoor unit are connected to each other through a parallel circuit of the check valve 23, 33, 2 and the check valve 23, 33, 43. The indoor heat exchanger 24, 34.44 is connected to the gas side pipe G1. G2 + 03 and a two-way valve 25.35° 45 for switching the refrigerant flow direction in the branch unit B, and is connected to the suction pipe 3b.
さらに、室内熱交換器２４，３４．４４は、ガス側管Ｇ
ｌ 、 Ｇ２ 、 Ｇ３ 、および分岐ユニットＢに
おける冷媒流れ方向切換用の二方弁２６．３６゜４６を
介し、上記吐出管２ｂに接続されている。Furthermore, the indoor heat exchanger 24, 34.44 has a gas side pipe G
1, G2, G3, and a two-way valve 26.36°46 for switching the refrigerant flow direction in the branch unit B, and is connected to the discharge pipe 2b.
作用を説明する。Explain the action.
室内ユニットＣ８が冷房運転モード、室内ユニットＣ２
が冷房運転モード、室内ユニットＣ３が暖房運転モード
であるとする。そして、室内ユニットｃ１．Ｃ２の要求
する冷房能力の総和が室内ユニットＣ３の要求する暖房
能力より大きいとする。Indoor unit C8 is in cooling operation mode, indoor unit C2
It is assumed that C3 is in the cooling operation mode and the indoor unit C3 is in the heating operation mode. And indoor unit c1. Assume that the total cooling capacity required by C2 is greater than the heating capacity required by indoor unit C3.
この場合、冷房主運転モードが決定され、第７図に示す
ように、室外ユニッｌ−Ａの二方弁４が開き（白色表示
）、かつ二方弁９が閉じ（黒色表示）、室外熱交換器５
が吐出管２ａに接続される。In this case, the cooling main operation mode is determined, and as shown in FIG. Exchanger 5
is connected to the discharge pipe 2a.
分岐ユニットＢでは、ＰＭＶ２１，３１．４１が開くと
ともに（白色表示）、二方弁２５，３５゜４６が開き（
白色表示）、かつ二方弁２６，３６゜４５が閉じ（黒色
表示）、 室内ユニットＣ＋ ＋０２にそれぞれ連通の
ガス側管Ｇ１．Ｇ２が吸入管３ｂに接続され、室内ユニ
ットＣ１に連通のガス側管Ｇ３が吐出管２ｂに接続され
る。In branch unit B, PMV21, 31.41 opens (white display), and two-way valve 25, 35°46 opens (
(white display), and the two-way valves 26, 36° 45 are closed (black display), and the gas side pipes G1. G2 is connected to the suction pipe 3b, and a gas side pipe G3 communicating with the indoor unit C1 is connected to the discharge pipe 2b.
こうして、矢印の方向に冷媒が流れ、室外熱交換器５が
凝縮器、室内熱交換器２４．３４が蒸発器、室内熱交換
器４４が凝縮器として働く。In this way, the refrigerant flows in the direction of the arrow, the outdoor heat exchanger 5 acts as a condenser, the indoor heat exchangers 24 and 34 act as an evaporator, and the indoor heat exchanger 44 acts as a condenser.
この場合、冷房側室内ユニットＣＩ、Ｃ２の吸熱の一部
が暖房側室内ユニットＣ３の放熱として利用される。In this case, part of the heat absorbed by the cooling indoor units CI and C2 is used as heat radiation from the heating indoor unit C3.
室内ユニットＣ１が暖房運転モード、室内ユニットＣ２
が暖房運転モード、室内ユニットＣ１が冷房運転モード
であるとする。そして、室内ユニットＣ１，Ｃ２の要求
する暖房能力の総和が室内ユニッ）Ｃ３の要求する冷房
能力より大きいとする。Indoor unit C1 is in heating operation mode, indoor unit C2
It is assumed that the indoor unit C1 is in the heating operation mode and the indoor unit C1 is in the cooling operation mode. Assume that the sum of the heating capacities required by the indoor units C1 and C2 is greater than the cooling capacity required by the indoor unit C3.
この場合、暖房主運転モードが決定され、第８図に示す
ように、室外ユニットＡの二方弁９が開き（白色表示）
、かつ三方弁４が閉じ（黒色表示）、室外熱交換器５が
吸入管３ａに接続される。In this case, the heating main operation mode is determined, and the two-way valve 9 of the outdoor unit A opens (displayed in white) as shown in FIG.
, and the three-way valve 4 is closed (displayed in black), and the outdoor heat exchanger 5 is connected to the suction pipe 3a.
分岐ユニットＢでは、ＰＭＶ２１，３１．４１が開くと
ともに（白色表示）、二方弁４５，２６゜３６が開き（
白色表示）、かつ二方弁２５，３５゜４６が閉じ（黒色
表示）、 室内ユニットＣ３Ｃ２にそれぞれ連通のガス
側管ｃｙ、、ｃｙ２が吐出管２ｂに接続され、室内ユニ
ットＣ１に連通のガス側管Ｇ３が吸入管３ｂに接続され
る。In branch unit B, PMV21, 31.41 opens (white display), and two-way valves 45, 26°36 open (
(displayed in white), and the two-way valves 25 and 35° 46 are closed (displayed in black), and the gas side pipes cy, cy2 communicating with the indoor unit C3C2 are connected to the discharge pipe 2b, and the gas side pipes communicating with the indoor unit C1 are connected to the discharge pipe 2b. Pipe G3 is connected to suction pipe 3b.
こうして、矢印の方向に冷媒が流れ、室内熱交換器２４
．３４が凝縮器、室内熱交換器４４および室外熱交換器
５が蒸発器として働く。In this way, the refrigerant flows in the direction of the arrow, and the indoor heat exchanger 24
．． 34 serves as a condenser, and the indoor heat exchanger 44 and outdoor heat exchanger 5 serve as evaporators.
この場合、冷房側室内ユニットＣ３および室外熱交換器
５の吸熱が暖房側室内ユニットＣ，。In this case, the heat absorbed by the cooling-side indoor unit C3 and the outdoor heat exchanger 5 is absorbed by the heating-side indoor unit C,.
Ｃ２の放熱として利用される。It is used as heat radiation for C2.
また、全ての室内ユニットＣ１，Ｃ２、Ｃ３が冷房運転
モードの場合、冷房主運転モードが決定され、第９図に
示すように、室外ユニットＡの二方弁４が開き、かつ二
方弁９が閉じ、室外熱交換器５が吐出管２ａに接続され
る。Further, when all the indoor units C1, C2, and C3 are in the cooling operation mode, the cooling main operation mode is determined, and as shown in FIG. 9, the two-way valve 4 of the outdoor unit A is opened and the two-way valve 9 is closed, and the outdoor heat exchanger 5 is connected to the discharge pipe 2a.
分岐ユニットＢでは、ＰＭＶ２１，３１．４１が開くと
ともに、二方弁２５，３５．４５が開き、かつ二方弁２
６，３６．４６が閉じ、室内ユニ・ノドｃ＋ 、Ｃ２＋
Ｃ３にそれぞれ連通のガス側管Ｇ １ 、Ｇ２ ＊
０３が吸入管３ｂに接続される。In branch unit B, PMV21, 31.41 opens, two-way valve 25, 35.45 opens, and two-way valve 2
6, 36.46 closed, indoor uni-nod c+, C2+
Gas side pipes G 1 and G2, respectively communicating with C3 *
03 is connected to the suction pipe 3b.
こうして、矢印の方向に冷媒が流れ、室外熱交換器５が
凝縮器、室内熱交換器２４，３４．４４が蒸発器として
働く。In this way, the refrigerant flows in the direction of the arrow, and the outdoor heat exchanger 5 acts as a condenser, and the indoor heat exchangers 24, 34, and 44 act as evaporators.
この場合、室内ユニットＣ＋ 、Ｃ２、Ｃ３の吸熱が室
外熱交換器５で放出される。In this case, the heat absorbed by the indoor units C+, C2, and C3 is released by the outdoor heat exchanger 5.
［発明が解決しようとする課題］
ところで、上記の空気調和機では、全ての室内ユニット
ＣＩ、Ｃ２，Ｃ３が冷房の場合、吐出管２ｂ内の冷媒が
徐々に凝縮して液化し、それが吐出管２ｂに溜まり込ん
でしまう。[Problem to be Solved by the Invention] By the way, in the above air conditioner, when all the indoor units CI, C2, and C3 are used for cooling, the refrigerant in the discharge pipe 2b gradually condenses and liquefies, which is then discharged. It accumulates in the pipe 2b.
こうなると、冷媒循環量が不足し、十分な冷房能力が得
られなくなる。When this happens, the amount of refrigerant circulating becomes insufficient and sufficient cooling capacity cannot be obtained.
この発明は上記事情を考慮したもので、請求項１の空気
調和機および請求項２の空気調和機のいずれも、冷媒不
足を解消して十分な冷房能力を得ることができ、常に快
適空調を可能とすることを目的とする。This invention has been made in consideration of the above circumstances, and both the air conditioner according to claim 1 and the air conditioner according to claim 2 can solve the refrigerant shortage and obtain sufficient cooling capacity, and can always provide comfortable air conditioning. The purpose is to make it possible.
［発明の構成］
（課題を解決するための手段）
請求項１の空気調和機は、圧縮機および室外熱交換器を
有し前記圧縮機の吐出口に第１および第２の吐出管を接
続した室外ユニットと、それぞれが室内熱交換器を有し
冷房または暖房の要求を出す複数の室内ユニットと、こ
れら室内ユニットの要求する冷房能力の総和と暖房能力
の総和とを比較して冷房主運転モードまたは暖房主運転
モードを決定する手段と、冷房主運転モードの決定時、
前記第１の吐出管に前記室外熱交換器を接続し同室外熱
交換器を経た冷媒を冷房要求の室内ユニットを通して圧
縮機に戻すとともに、前記第２の吐出管に暖房要求の室
内ユニットを接続し同室内ユニットを経た冷媒を冷房要
求の室内ユニットへの冷媒の流れに合流させる手段と、
冷房主運転モードの決定時、全ての室内ユニットが冷房
の場合に同各室内ユニットに連通のガス側管と前記第２
の吐出管とを定期的に接続する手段と、暖房主運転モー
ドの決定時、前記第２の吐出管に暖房側室内ユニットを
接続し同室内ユニットを経た冷媒を前記室外熱交換器に
通して圧縮機に戻すとともに、暖房側室内ユニットを経
た冷媒の一部を冷房側室内ユニットに通して圧縮機に戻
す手段とを備える。[Structure of the Invention] (Means for Solving the Problems) An air conditioner according to claim 1 includes a compressor and an outdoor heat exchanger, and first and second discharge pipes are connected to a discharge port of the compressor. Main cooling operation is performed by comparing the total cooling capacity and total heating capacity required by the indoor units with multiple indoor units, each of which has an indoor heat exchanger, that requests cooling or heating. means for determining the mode or heating main operation mode, and when determining the cooling main operation mode;
The outdoor heat exchanger is connected to the first discharge pipe, and the refrigerant that has passed through the outdoor heat exchanger is returned to the compressor through the indoor unit requesting cooling, and the indoor unit requesting heating is connected to the second discharge pipe. means for causing the refrigerant that has passed through the same indoor unit to join the flow of refrigerant to the indoor unit that requests cooling;
When determining the cooling main operation mode, if all indoor units are in cooling mode, the gas side pipe communicating with each indoor unit and the second
means for periodically connecting a heating side indoor unit to the second discharge pipe and passing the refrigerant that has passed through the indoor unit to the outdoor heat exchanger when determining the heating main operation mode; It also includes means for returning a part of the refrigerant that has passed through the heating indoor unit to the cooling indoor unit and returning it to the compressor.
請求項２の空気調和機は、圧縮機および室外熱交換器を
有し前記圧縮機の吐出口に第１および第２の吐出管を接
続した室外ユニットと、それぞれが室内熱交換器を有し
冷房または暖房の要求を出す複数の室内ユニットと、こ
れら室内ユニットの要求する冷房能力の総和と暖房能力
の総和とを比較して冷房主運転モードまたは暖房主運転
モードを決定する手段と、冷房主運転モードの決定時、
前記第１の吐出管に前記室外熱交換器を接続し同室外熱
交換器を経た冷媒を冷房要求の室内ユニットを通して圧
縮機に戻すとともに、前記第２の吐出管に暖房要求の室
内ユニットを接続し同室内ユニットを経た冷媒を冷房要
求の室内ユニットへの冷媒の流れに合流させる手段と、
暖房主運転モードの決定時、前記第２の吐出管に暖房側
室内ユニットを接続し同室内ユニットを経た冷媒を前記
室外熱交換器に通して圧縮機に戻すとともに、暖房側室
内ユニットを経た冷媒の一部を冷房側室内ユニットに通
して圧縮機に戻す手段と、前記各室内ユニットに連通の
ガス側管と前記第２の吐出管との間に設けたバイパスと
、このバイパスに設けた二方弁と、冷房主運転モードの
決定時、全ての室内ユニットが冷房の場合に前記二方弁
を定期的に開く手段とを備える。An air conditioner according to a second aspect of the present invention includes an outdoor unit having a compressor and an outdoor heat exchanger and having first and second discharge pipes connected to a discharge port of the compressor, and each having an indoor heat exchanger. A means for determining a cooling main operation mode or a heating main operation mode by comparing a plurality of indoor units that issue cooling or heating requests, and the total cooling capacity and the total heating capacity requested by these indoor units; When determining the driving mode,
The outdoor heat exchanger is connected to the first discharge pipe, and the refrigerant that has passed through the outdoor heat exchanger is returned to the compressor through the indoor unit requesting cooling, and the indoor unit requesting heating is connected to the second discharge pipe. means for causing the refrigerant that has passed through the same indoor unit to join the flow of refrigerant to the indoor unit that requests cooling;
When the heating main operation mode is determined, a heating indoor unit is connected to the second discharge pipe, and the refrigerant that has passed through the indoor unit is passed through the outdoor heat exchanger and returned to the compressor, and the refrigerant that has passed through the heating indoor unit is means for passing a part of the gas through the cooling indoor unit and returning it to the compressor; a bypass provided between the gas side pipe communicating with each of the indoor units and the second discharge pipe; A two-way valve, and means for periodically opening the two-way valve when all indoor units are in cooling mode when a cooling main operation mode is determined.
（作用）
請求項１の空気調和機では、室内ユニットの全てが冷房
の場合、各室内ユニットに連通のガス側管と第２の吐出
管とが定期的に接続する。この接続時、第２の吐出管内
の冷媒が圧縮機に吸入される。(Function) In the air conditioner according to the first aspect, when all the indoor units are for cooling, the gas side pipe and the second discharge pipe communicating with each indoor unit are periodically connected. At the time of this connection, the refrigerant in the second discharge pipe is sucked into the compressor.
請求項２の空気調和機では、室内ユニットの全てが冷房
の場合、各室内ユニットに連通のガス側管と第２の吐出
管とがバイパスを介して定期的に導通する。この導通時
、第２の吐出管内の冷媒が圧縮機に吸入される。In the air conditioner according to the second aspect of the invention, when all of the indoor units are used for cooling, the gas side pipe and the second discharge pipe communicating with each indoor unit are periodically communicated via the bypass. During this conduction, the refrigerant in the second discharge pipe is sucked into the compressor.
（実施例）
以下、この発明の第１実施例について図面を参照して説
明する。この第１実施例は、請求項１の空気調和機に対
応する。なお、図面において第７図と同一部分には同一
符号を付し、その詳細な説明は省略する。(Example) Hereinafter, a first example of the present invention will be described with reference to the drawings. This first embodiment corresponds to the air conditioner of claim 1. In the drawings, the same parts as in FIG. 7 are designated by the same reference numerals, and detailed explanation thereof will be omitted.
冷凍サイクルの構成を第２図に示すか、これは従来と同
じである。The configuration of the refrigeration cycle is shown in FIG. 2, and is the same as the conventional one.
制御回路を第１図に示す。The control circuit is shown in FIG.
室外ユニットＡは、マイクロコンピュータおよびその周
辺回路からなる室外制御部５０を備える。The outdoor unit A includes an outdoor control section 50 consisting of a microcomputer and its peripheral circuits.
この室外制御部５０に、インバータ回路５１および二方
弁４，９を接続する。An inverter circuit 51 and two-way valves 4 and 9 are connected to this outdoor control section 50.
インバータ回路５１は、交流電源５２の電圧を整流し、
それを室外制御部５０の指令に応じた所定周波数（およ
びレベル）の交流電圧に変換し、圧縮機モータＩＭに駆
動電力として供給するものである。The inverter circuit 51 rectifies the voltage of the AC power supply 52,
This is converted into an alternating current voltage of a predetermined frequency (and level) according to a command from the outdoor control unit 50, and is supplied to the compressor motor IM as driving power.
分岐ユニットＢは、マイクロコンピュータおよびその周
辺回路からなるマルチ制御部６０を備える。このマルチ
制御部６０に、ＰＭＶ２１，３１゜４１および二方弁２
５，３５，４５．２６，３６゜４６を接続する。Branch unit B includes a multi-control unit 60 consisting of a microcomputer and its peripheral circuits. This multi-control unit 60 includes PMVs 21, 31° 41 and two-way valve 2.
Connect 5, 35, 45.26, 36°46.
室内ユニットＣＩ ＊ Ｃ２＋ ０３は、それぞれ
マイクロコンピュータおよびその周辺回路からなる室内
制御部７０を備える。これら室内制御部７０に、リモー
トコントロール式の運転操作部（以下、リモコンと略称
する）７１および室内温度センサ７２を接続する。Each of the indoor units CI*C2+ 03 includes an indoor control section 70 consisting of a microcomputer and its peripheral circuits. A remote control operation unit (hereinafter referred to as a remote control) 71 and an indoor temperature sensor 72 are connected to the indoor control unit 70 .
そして、室内制御部７０は、次の機能手段を備えている
。The indoor control unit 70 includes the following functional means.
■リモコン７１の操作に基づく冷房運転モードの要求ま
たは暖房運転モードの要求をマルチ制御部６０に送る手
段。(2) Means for sending a request for a cooling operation mode or a request for a heating operation mode to the multi-control unit 60 based on the operation of the remote controller 71.
■リモコン７１で設定される室内温度と室内温度センサ
７２の検知温度との差を要求冷房能力（冷房運転モード
時）または要求暖房能力（暖房運転モード時）としてマ
ルチ制御部６０に送る手段。(2) Means for sending the difference between the indoor temperature set by the remote controller 71 and the temperature detected by the indoor temperature sensor 72 to the multi-control unit 60 as the required cooling capacity (in the cooling operation mode) or the required heating capacity (in the heating operation mode).
また、マルチ制御部６０、室外制御部５０、各ＰＭＶ、
および各二方弁により、次の機能手段を構成している。In addition, the multi-control unit 60, the outdoor control unit 50, each PMV,
The two-way valves constitute the following functional means:
■室内ユニットＣ１ｒ Ｃ２、ｃ、のいずれかから要
求される冷房能力の総和が同じく要求される暖房能力の
総和より大きいとき、冷房主運転モードを決定する手段
。■ Means for determining the cooling main operation mode when the sum of the cooling capacities requested from either indoor unit C1r or C2 or c is greater than the sum of the heating capacities also requested.
■冷房主運転モードを決定したとき、吐出管２ａに室外
熱交換器５を接続し、その室外熱交換器５を経た冷媒を
冷房側の室内ユニットに通して圧縮機１に戻す手段。(2) A means for connecting the outdoor heat exchanger 5 to the discharge pipe 2a and passing the refrigerant that has passed through the outdoor heat exchanger 5 through the indoor unit on the cooling side and returning it to the compressor 1 when the cooling main operation mode is determined.
■冷房主運転モードを決定したとき、吐出管２ｂに暖房
側の室内ユニットを接続し、その室内ユニットを経た冷
媒を冷房側の室内ユニットへの冷媒の流れに合流させる
手段。(2) When the cooling main operation mode is determined, means for connecting a heating indoor unit to the discharge pipe 2b and causing the refrigerant that has passed through that indoor unit to join the flow of refrigerant to the cooling indoor unit.
■冷房主運転モードを決定したとき、要求冷房能力の総
和に応じて圧縮機１の運転周波数（インバータ回路５１
の出力周波数）を制御する手段。■When the cooling main operation mode is determined, the operating frequency of the compressor 1 (inverter circuit 51
means to control the output frequency).
■冷房主運転モードを決定したとき、全ての室内ユニッ
トＣ１，Ｃ２，Ｃ３が冷房の場合に二方弁２６，３６．
４６を定期的たとえばタイマカウントに基づく所定時間
ごとに一定時間だけ開き、室内ユニットＣ１，Ｃ２，Ｃ
３に連通のガス側管ｃ１＋ Ｇ２ ＋ ０３と吐出管
２ｂとを接続する手段。■When the cooling main operation mode is determined, if all the indoor units C1, C2, C3 are in the cooling mode, the two-way valves 26, 36.
46 is opened for a certain period of time periodically, for example, at predetermined intervals based on a timer count, and the indoor units C1, C2, C
Means for connecting the gas side pipe c1+G2+03 communicating with the discharge pipe 2b to the gas side pipe c1+G2+03.
■室内ユニットＣ１，ｃ２．ｃ３のいずれかから要求さ
れる暖房能力の総和が同じく要求される冷房能力の総和
より大きいとき、暖房主運転モードを決定する手段。■Indoor units C1, c2. Means for determining the heating main operation mode when the sum of heating capacities requested from any of c3 is larger than the sum of cooling capacities also requested.
■暖房主運転モードを決定したとき、吐出管２ｂに暖房
側の室内ユニットを接続し、その室内ユニットを経た冷
媒を室外熱交換器５に通して圧縮機１に戻す手段。■Means for connecting a heating-side indoor unit to the discharge pipe 2b and passing the refrigerant that has passed through the indoor unit through the outdoor heat exchanger 5 and returning it to the compressor 1 when the heating main operation mode is determined.
■暖房主運転モードを決定したとき、暖房側の室内ユニ
ットを経た冷媒の一部を冷房側の室内ユニットに通して
圧縮機１に戻す手段。■Means for returning part of the refrigerant that has passed through the indoor unit on the heating side to the indoor unit on the cooling side to the compressor 1 when the heating main operation mode is determined.
■暖房主運転モードを決定したとき、暖房主運転モード
を決定したとき、要求暖房能力の総和に応じて圧縮機１
の運転周波数（インバータ回路５１の出力周波数）を制
御する手段。■When the heating main operation mode is determined, when the heating main operation mode is determined, the compressor 1
means for controlling the operating frequency (output frequency of the inverter circuit 51).
次に、上記の構成において第３図を参照しながら作用を
説明する。Next, the operation of the above configuration will be explained with reference to FIG. 3.
全ての室内ユニットｃ＋ 、Ｃ２、Ｃ３が冷房の場合、
冷房主運転モードか決定され、室外ユニットＡにおいて
二方弁４が開き、かつ三方弁９が閉じ、室外熱交換器５
が吐出管２ａに接続される（第７因と同じ）。If all indoor units c+, C2, and C3 are air conditioners,
The cooling main operation mode is determined, the two-way valve 4 opens in the outdoor unit A, the three-way valve 9 closes, and the outdoor heat exchanger 5
is connected to the discharge pipe 2a (same as the seventh factor).
分岐ユニットＢでは、ＰＭＶ２１，３１．４１が開くと
ともに、二方弁２５，３５．４５および二方弁２６，３
６．４６が開き、室内ユニットＣＩ、Ｃ２，Ｃ３にそれ
ぞれ連通のガス側配管ｃｒ、 ＋ ｃｙ２．Ｇ３が圧縮
機１の吸入管３ｂに接続される。In branch unit B, PMV21, 31.41 opens and two-way valves 25, 35.45 and two-way valves 26, 3 open.
6.46 is opened, and the gas side pipes cr, + cy2. are connected to the indoor units CI, C2, and C3, respectively. G3 is connected to the suction pipe 3b of the compressor 1.
こうして、矢印の方向に冷媒が流れ、室外熱交換器５が
凝縮器、室内熱交換器２４，３４．４４が蒸発器として
働く。In this way, the refrigerant flows in the direction of the arrow, and the outdoor heat exchanger 5 acts as a condenser, and the indoor heat exchangers 24, 34, and 44 act as evaporators.
すなわち、室内ユニットＣ，，Ｃ２，Ｃ，の吸熱が室外
熱交換器５で放出される。That is, the heat absorbed by the indoor units C, , C2, and C is released by the outdoor heat exchanger 5.
この場合、運転開始と同時にタイムカウントを行なって
おり、所定時間ｔが経過すると、第２図に示すように二
方弁２６，３６．４６を一定時間だけ開く。In this case, a time count is performed at the same time as the start of operation, and when a predetermined time t has elapsed, the two-way valves 26, 36, and 46 are opened for a predetermined time as shown in FIG.
二方弁２６，３６．４６が開くと、ガス側管Ｇ１．Ｇ２
．Ｇ３と吐出管２ｂとが接続される。When the two-way valves 26, 36 and 46 open, the gas side pipe G1. G2
．． G3 and discharge pipe 2b are connected.
この接続に際し、吐出管２ｂに溜まっていた冷媒が二方
弁２６．３６．４６ガス側管ｃ、、ｃｙ２゜Ｇ３、およ
び二方弁２５，３５．４５を通って吸入管３ｂに流入し
、圧縮機１に回収される。At the time of this connection, the refrigerant accumulated in the discharge pipe 2b flows into the suction pipe 3b through the two-way valves 26, 36, 46, the gas side pipes c, cy2°G3, and the two-way valves 25, 35, 45, It is recovered by the compressor 1.
したがって、吐出管２ｂに冷媒が溜まり込むことがなく
、必要な冷媒循環量を確保することができる。これによ
り、室内ユニットＣＩ ＊ Ｃ２＋０３において十分
な冷房能力を得ることができ、常に快適空調が可能であ
る。Therefore, the refrigerant does not accumulate in the discharge pipe 2b, and the necessary amount of refrigerant circulation can be ensured. As a result, sufficient cooling capacity can be obtained in the indoor unit CI*C2+03, and comfortable air conditioning is always possible.
この発明の第２実施例を第４図に示す。この第２実施例
は、請求項２の空気調和機に対応する。A second embodiment of the invention is shown in FIG. This second embodiment corresponds to the air conditioner of claim 2.
ここでは、分岐ユニットＢにおいて、室内ユニットＣ１
，Ｃ２、Ｃ３にそれぞれ連通のガス側配管Ｇ １ ｒ
Ｇ２ 、Ｃ３と吐出管２ｂとの間に、バイパス９０を設
け、そのバイパス９０に二方弁８０およびキャピラリチ
ューブ８１，８２．８３を設ける。Here, in the branch unit B, the indoor unit C1
, gas side piping G 1 r communicating with C2 and C3, respectively.
A bypass 90 is provided between G2, C3 and the discharge pipe 2b, and the bypass 90 is provided with a two-way valve 80 and capillary tubes 81, 82, 83.
さらに、第５図に示すように、マルチ制御部６０に上記
二方弁８０を接続する。Furthermore, as shown in FIG. 5, the two-way valve 80 is connected to the multi-control unit 60.
そして、マルチ制御部６０、室外制御部５０、各ＰＭＶ
、および各三方弁により、次の機能手段を構成している
。Then, the multi-control unit 60, the outdoor control unit 50, each PMV
, and each three-way valve constitute the following functional means.
■室内ユニッｈｃ、、ｃ２．Ｃ３のいずれかから要求さ
れる冷房能力の総和が同じく要求される暖房能力の総和
より大きいとき、冷房主運転モードを決定する手段。■Indoor unit hc,,c2. Means for determining the cooling main operation mode when the sum of cooling capacities requested from any of C3 is larger than the sum of heating capacities also requested.
■冷房主運転モードを決定したとき、吐出管２ａに室外
熱交換器５を接続し、その室外熱交換器５を経た冷媒を
冷房側の室内ユニットに通して圧縮機１に戻す手段。(2) A means for connecting the outdoor heat exchanger 5 to the discharge pipe 2a and passing the refrigerant that has passed through the outdoor heat exchanger 5 through the indoor unit on the cooling side and returning it to the compressor 1 when the cooling main operation mode is determined.
■冷房主運転モードを決定したとき、吐出管２ｂに暖房
側の室内ユニットを接続し、その室内ユニットを経た冷
媒を冷房側の室内ユニ・ソトへの冷媒の流れに合流させ
る手段。■Means for connecting the indoor unit on the heating side to the discharge pipe 2b when the cooling main operation mode is determined, and causing the refrigerant that has passed through the indoor unit to join the flow of refrigerant to the indoor unit on the cooling side.
■冷房主運転モードを決定したとき、要求冷房能力の総
和に応じて圧縮機１の運転周波数（インバータ回路５１
の出力周波数）を制御する手段。■When the cooling main operation mode is determined, the operating frequency of the compressor 1 (inverter circuit 51
means to control the output frequency).
■冷房主運転モードを決定したとき、全ての室内ユニッ
トＣ１，ｃ２．Ｃ３が冷房の場合１こ二方弁８０を定期
的たとえばタイマカウントに基づく所定時間ごとに一定
時間だけ開く手段。■When the cooling main operation mode is determined, all indoor units C1, c2. When C3 is for cooling, means for opening the two-way valve 80 periodically, for example, for a predetermined period of time based on a timer count.
■室内ユニットＣ１，Ｃ２，Ｃ３のいずれかから要求さ
れる暖房能力の総和か同じく要求される冷房能力の総和
より大きいとき、暖房主運転モードを決定する手段。(2) Means for determining the heating main operation mode when the sum of the heating capacities requested from any of the indoor units C1, C2, and C3 is greater than the sum of the cooling capacities also requested.
■暖房主運転モードを決定したとき、吐出管２ｂに暖房
側の室内ユニットを接続し、その室内ユニットを経た冷
媒を室外熱交換器５：こ通して圧縮機１に戻す手段。■When the heating main operation mode is determined, the indoor unit on the heating side is connected to the discharge pipe 2b, and the refrigerant that has passed through the indoor unit is returned to the compressor 1 through the outdoor heat exchanger 5.
■暖房主運転モードを決定したとき、暖房側の室内ユニ
ットを経た冷媒の一部を冷房側の室内ユニットに通して
圧縮機１に戻す手段。■Means for returning part of the refrigerant that has passed through the indoor unit on the heating side to the indoor unit on the cooling side to the compressor 1 when the heating main operation mode is determined.
■暖房主運転モードを決定したとき、暖房主運転モード
を決定したとき、要求暖房能力の総和に応じて圧縮機１
の運転周波数（インノく一夕日路５１の出力周波数）を
制御する手段。■When the heating main operation mode is determined, when the heating main operation mode is determined, the compressor 1
Means for controlling the operating frequency (output frequency of Inno Kuichi Yuhiji 51).
その他の構成については第１実施例と同じである。The other configurations are the same as in the first embodiment.
第６図のフローチャートを参照しながら作用を説明する
。The operation will be explained with reference to the flowchart in FIG.
全ての室内ユニットＣ１，Ｃ２、Ｃ３が冷房の場合、冷
房主運転モードが決定され、室外ユニ・ソトＡにおいて
二方弁４が開き、かつ二方弁９か閉じ、室外熱交換器５
が吐出管２ａに接続される。When all the indoor units C1, C2, and C3 are in the cooling mode, the cooling main operation mode is determined, the two-way valve 4 opens in the outdoor uni-soto A, the two-way valve 9 closes, and the outdoor heat exchanger 5
is connected to the discharge pipe 2a.
分岐ユニットＢては、ＰＭＶ２１，３１．４１が開くと
ともに、二方弁２５，３５．４５および二方弁２６．３
６．４６が開き、室内ユニ・ソトｃ、、Ｃ２，Ｃ３にそ
れぞれ連通のガス側配管Ｇ１ 、Ｇ２ ｒ ０３が圧縮
機１の吸入管３ｂに接続される。In branch unit B, PMV21, 31.41 opens and two-way valves 25, 35.45 and two-way valve 26.3 open.
6.46 is opened, and the gas side pipes G1 and G2 r03 communicating with the indoor uni-soto c, , C2, and C3, respectively, are connected to the suction pipe 3b of the compressor 1.
こうして、矢印の方向に冷媒が流れ、室外熱交換器５が
凝縮器、室内熱交換器２４，３４．４４が蒸発器として
働く。In this way, the refrigerant flows in the direction of the arrow, and the outdoor heat exchanger 5 acts as a condenser, and the indoor heat exchangers 24, 34, and 44 act as evaporators.
すなわち、室内ユニットｃ、、Ｃ２，Ｃ３の吸熱が室外
熱交換器５で放出される。That is, the heat absorbed by the indoor units c, , C2, and C3 is released by the outdoor heat exchanger 5.
この場合、運転開始と同時にタイムカウントを行なりで
おり、所定時間ｔが経過すると、第４図に示すように二
方弁８０を一定時間だけ開く。In this case, a time count is performed at the same time as the start of operation, and when a predetermined time t has elapsed, the two-way valve 80 is opened for a predetermined time as shown in FIG.
二方弁８０が開くと、ガス側管Ｇ ｌ ｒ ０２ ＊０
３と吐出管２ｂとがバイパス９０を介して導通する
この導通に際し、吐出管２ｂに溜まっていた冷媒がバイ
パス９０、二方弁８０、ガス側管Ｇ１゜Ｇ２ 、 Ｇ３
、および二方弁２５，３５．４５を通って吸入管３ｂ
に流入し、圧縮機１に回収される。When the two-way valve 80 opens, the gas side pipe G l r 02 *0
3 and the discharge pipe 2b are connected to each other via the bypass 90. During this communication, the refrigerant accumulated in the discharge pipe 2b is transferred to the bypass 90, the two-way valve 80, and the gas side pipes G1, G2, and G3.
, and the suction pipe 3b through the two-way valve 25, 35.45.
and is collected by the compressor 1.
したがって、吐出管２ｂに冷媒が溜まり込むことがなく
、必要な冷媒循環量を確保することができる。これによ
り、室内ユニットＣＩ ＋ Ｃ２＋Ｃ３において十分
な冷房能力を得ることができ、常に快適空調が可能であ
る。Therefore, the refrigerant does not accumulate in the discharge pipe 2b, and the necessary amount of refrigerant circulation can be ensured. As a result, sufficient cooling capacity can be obtained in the indoor units CI+C2+C3, and comfortable air conditioning is always possible.
なお、上記実施例では、室内ユニットが３台の場合を例
に説明したが、その台数に限定はない。In addition, although the said Example demonstrated the case where there were three indoor units as an example, there is no limitation to the number.
［発明の効果］
以上述べたようにこの発明によれば、
請求項１の空気調和機は、室内ユニットの全てが冷房の
場合、各室内ユニットに連通のガス側管と第２の吐出管
とを定期的に接続する構成としたので、冷媒不足を解消
して十分な冷房能力を得ることができ、常に快適空調が
可能となる。[Effects of the Invention] As described above, according to the present invention, the air conditioner of claim 1 has a gas side pipe and a second discharge pipe communicating with each indoor unit when all of the indoor units are for cooling. Since the system is configured to connect regularly, it is possible to eliminate refrigerant shortages and obtain sufficient cooling capacity, ensuring comfortable air conditioning at all times.
請求項２の空気調和機は、室内ユニットの全てが冷房の
場合、各室内ユニットに連通のガス側管と第２の吐出管
とがバイパスを介して定期的に導通する構成としたので
、冷媒不足を解消して十分な冷房能力を得ることができ
、常に快適空調が可能となる。In the air conditioner according to claim 2, when all of the indoor units are used for cooling, the gas side pipe and the second discharge pipe communicating with each indoor unit are periodically connected to each other via a bypass, so that the refrigerant It is possible to eliminate the shortage and obtain sufficient cooling capacity, allowing comfortable air conditioning at all times.
第１図はこの発明の第１実施例の制御回路の構成を示す
図、第２図は同実施例の冷凍サイクルの構成および冷媒
の流れを示す図、第３図は同実施例の作用を説明するた
めのフローチャート、第４図はこの発明の第２実施例の
冷凍サイクルの構成を示す図、第５図は同実施例の制御
回路の構成を示す図、第６図は同実施例の作用を説明す
るためのフローチャート、第７図ないし第９図はそれぞ
れ従来の空気調和機の冷凍サイクルの構成および冷媒の
流れを示す図である。
Ａ・・・室外ユニット、Ｂ・・・分岐ユニット、Ｃ１゜
Ｃ２，Ｃ３・・・室内ユニット、Ｗ・・・液側管、Ｇ１
Ｇ２．Ｇ３・・・ガス側管、１・・・圧縮機、２ａ・・
・第１の吐出管、２ｂ・・・第２の吐出管、３ａ・・・
第１の吸入管、３ｂ・・・第２の吸入管、５・・・室外
熱交換器、２１．３１．４１・・・ＰＭＶ、２４，３４
．４４・・・室内熱交換器、５０・・・室外制御部、６
０・・・マルチ制御部、７０・・・室内制御部。FIG. 1 is a diagram showing the configuration of a control circuit according to a first embodiment of the present invention, FIG. 2 is a diagram showing the configuration of a refrigeration cycle and the flow of refrigerant in the same embodiment, and FIG. 3 is a diagram showing the operation of the same embodiment. Flowchart for explanation; FIG. 4 is a diagram showing the configuration of the refrigeration cycle of the second embodiment of the present invention; FIG. 5 is a diagram showing the configuration of the control circuit of the second embodiment; FIG. Flowcharts for explaining the operation, and FIGS. 7 to 9 are diagrams showing the configuration of the refrigeration cycle of a conventional air conditioner and the flow of refrigerant, respectively. A...Outdoor unit, B...Branch unit, C1゜C2, C3...Indoor unit, W...Liquid side pipe, G1
G2. G3...Gas side pipe, 1...Compressor, 2a...
・First discharge pipe, 2b...Second discharge pipe, 3a...
First suction pipe, 3b... Second suction pipe, 5... Outdoor heat exchanger, 21.31.41... PMV, 24,34
．． 44... Indoor heat exchanger, 50... Outdoor control unit, 6
0...Multi control unit, 70...Indoor control unit.
Claims (2)
出口に第１および第２の吐出管を接続した室外ユニット
と、それぞれが室内熱交換器を有し冷房または暖房の要
求を出す複数の室内ユニットと、これら室内ユニットの
要求する冷房能力の総和と暖房能力の総和とを比較して
冷房主運転モードまたは暖房主運転モードを決定する手
段と、冷房主運転モードの決定時、前記第１の吐出管に
前記室外熱交換器を接続し同室外熱交換器を経た冷媒を
冷房要求の室内ユニットを通して圧縮機に戻すとともに
、前記第２の吐出管に暖房要求の室内ユニットを接続し
同室内ユニットを経た冷媒を冷房要求の室内ユニットへ
の冷媒の流れに合流させる手段と、冷房主運転モードの
決定時、全ての室内ユニットが冷房の場合に同各室内ユ
ニットに連通のガス側管と前記第２の吐出管とを定期的
に接続する手段と、暖房主運転モードの決定時、前記第
２の吐出管に暖房側室内ユニットを接続し同室内ユニッ
トを経た冷媒を前記室外熱交換器に通して圧縮機に戻す
とともに、暖房側室内ユニットを経た冷媒の一部を冷房
側室内ユニットに通して圧縮機に戻す手段とを具備した
ことを特徴とする空気調和機。(1) An outdoor unit that has a compressor and an outdoor heat exchanger and has first and second discharge pipes connected to the discharge port of the compressor, and an outdoor unit that each has an indoor heat exchanger and handles cooling or heating requests. means for determining a cooling main operation mode or a heating main operation mode by comparing a plurality of indoor units, and a total cooling capacity and a heating capacity required by these indoor units, and determining the cooling main operation mode; The outdoor heat exchanger is connected to the first discharge pipe, and the refrigerant that has passed through the outdoor heat exchanger is returned to the compressor through the indoor unit requesting cooling, and the indoor unit requesting heating is connected to the second discharge pipe. and a means for merging the refrigerant that has passed through the same indoor unit with the flow of refrigerant to the indoor unit requesting cooling, and a gas side that communicates with each indoor unit when all indoor units are in cooling mode when determining the cooling main operation mode. means for periodically connecting the pipe and the second discharge pipe; and a heating side indoor unit is connected to the second discharge pipe when the heating main operation mode is determined, and the refrigerant passing through the indoor unit is transferred to the outdoor heat. An air conditioner characterized by comprising means for passing the refrigerant through an exchanger and returning it to the compressor, and also passing a part of the refrigerant that has passed through the heating side indoor unit through the cooling side indoor unit and returning it to the compressor.
出口に第１および第２の吐出管を接続した室外ユニット
と、それぞれが室内熱交換器を有し冷房または暖房の要
求を出す複数の室内ユニットと、これら室内ユニットの
要求する冷房能力の総和と暖房能力の総和とを比較して
冷房主運転モードまたは暖房主運転モードを決定する手
段と、冷房主運転モードの決定時、前記第１の吐出管に
前記室外熱交換器を接続し同室外熱交換器を経た冷媒を
冷房要求の室内ユニットを通して圧縮機に戻すとともに
、前記第２の吐出管に暖房要求の室内ユニットを接続し
同室内ユニットを経た冷媒を冷房要求の室内ユニットへ
の冷媒の流れに合流させる手段と、暖房主運転モードの
決定時、前記第２の吐出管に暖房側室内ユニットを接続
し同室内ユニットを経た冷媒を前記室外熱交換器に通し
て圧縮機に戻すとともに、暖房側室内ユニットを経た冷
媒の一部を冷房側室内ユニットに通して圧縮機に戻す手
段と、前記各室内ユニットに連通のガス側管と前記第２
の吐出管との間に設けたバイパスと、このバイパスに設
けた二方弁と、冷房主運転モードの決定時、全ての室内
ユニットが冷房の場合に前記二方弁を定期的に開く手段
とを具備したことを特徴とする空気調和機。(2) An outdoor unit that has a compressor and an outdoor heat exchanger and has first and second discharge pipes connected to the discharge port of the compressor, and an outdoor unit that has an indoor heat exchanger and handles cooling or heating requests. means for determining a cooling main operation mode or a heating main operation mode by comparing a plurality of indoor units, and a total cooling capacity and a heating capacity required by these indoor units, and determining the cooling main operation mode; The outdoor heat exchanger is connected to the first discharge pipe, and the refrigerant that has passed through the outdoor heat exchanger is returned to the compressor through the indoor unit requesting cooling, and the indoor unit requesting heating is connected to the second discharge pipe. means for merging the refrigerant that has passed through the same indoor unit with the flow of refrigerant to the indoor unit requesting cooling; and a means for connecting the heating-side indoor unit to the second discharge pipe to connect the same indoor unit when determining the heating main operation mode. means for passing the refrigerant that has passed through the outdoor heat exchanger and returning it to the compressor, and passing a portion of the refrigerant that has passed through the heating indoor unit to the cooling indoor unit and returning it to the compressor; and a gas communicating with each of the indoor units. side pipe and said second
a two-way valve provided on the bypass, and a means for periodically opening the two-way valve when all indoor units are in cooling mode when a cooling main operation mode is determined. An air conditioner characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2196321A JP2874976B2 (en) | 1990-07-26 | 1990-07-26 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2196321A JP2874976B2 (en) | 1990-07-26 | 1990-07-26 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0484079A true JPH0484079A (en) | 1992-03-17 |
| JP2874976B2 JP2874976B2 (en) | 1999-03-24 |
Family
ID=16355877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2196321A Expired - Fee Related JP2874976B2 (en) | 1990-07-26 | 1990-07-26 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2874976B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759008A (en) * | 2018-06-12 | 2018-11-06 | 广东美的暖通设备有限公司 | Control method, device and the air-conditioning with it of air-conditioning |
-
1990
- 1990-07-26 JP JP2196321A patent/JP2874976B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759008A (en) * | 2018-06-12 | 2018-11-06 | 广东美的暖通设备有限公司 | Control method, device and the air-conditioning with it of air-conditioning |
| CN108759008B (en) * | 2018-06-12 | 2020-09-04 | 广东美的暖通设备有限公司 | Control method and device of air conditioner and air conditioner with control device |
| US11333379B2 (en) | 2018-06-12 | 2022-05-17 | Hefei Midea Heating & Ventilating Equipment Co., Ltd. | Air conditioner controlling method and apparatus and air conditioner having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2874976B2 (en) | 1999-03-24 |
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