JPH04198672A - Electric expansion valve controller for multi-chamber type air-conditioning machine - Google Patents

Electric expansion valve controller for multi-chamber type air-conditioning machine

Info

Publication number
JPH04198672A
JPH04198672A JP2332529A JP33252990A JPH04198672A JP H04198672 A JPH04198672 A JP H04198672A JP 2332529 A JP2332529 A JP 2332529A JP 33252990 A JP33252990 A JP 33252990A JP H04198672 A JPH04198672 A JP H04198672A
Authority
JP
Japan
Prior art keywords
heat exchanger
indoor
expansion valve
electric expansion
detecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2332529A
Other languages
Japanese (ja)
Inventor
Morihiro Mizushima
水島 謹寛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Ecology Systems Co Ltd
Original Assignee
Matsushita Seiko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Seiko Co Ltd filed Critical Matsushita Seiko Co Ltd
Priority to JP2332529A priority Critical patent/JPH04198672A/en
Publication of JPH04198672A publication Critical patent/JPH04198672A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0232Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses
    • F25B2313/02323Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses during heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2513Expansion valves

Landscapes

  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE:To minimize heat loss by a method wherein the detecting value of a thermistor for detecting an indoor heat exchanger temperature for an indoor unit, whose operation is being stopped, is compared with a detecting value during operation in room heating operation to control the opening degree of an electric expansion valve coping with the indoor unit whose operation is being stopped. CONSTITUTION:The detecting values of indoor heat exchanger temperature detecting thermistors 24, 25 for indoor units 8, 9 being operated are compared with the detecting value of an indoor heat exchanger temperature detecting thermistor 26 for another indoor unit 10 whose operation is being stopped. According to this method, the condensing condition of refrigerant in the indoor heat exchanger 23 of the indoor unit 10 whose operation is being stopped is detected and when the condensed refrigerant is stagnated in the lower part of the indoor heat exchanger 23 and the detecting value of the indoor heat exchanger temperature detecting thermistor 26 has become a temperature lower than a given value, a signal is transmitted to an expansion valve opening degree determining device 20 through a signal wire 27 to open an electric expansion valve 7 slightly and conduct the condensed refrigerant to the side of an outdoor heat exchanger 4. Thereafter, when the detecting value has become a temperature higher than a given value, the electric expansion valve 7 is closed again perfectly.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、−台の室外ユニットに対し、複数の室内ユニ
ットを冷媒配管で接続した多室形空気調和機の電動膨脹
弁制御装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric expansion valve control device for a multi-room air conditioner in which a plurality of indoor units are connected to two outdoor units by refrigerant piping. .

従来の技術 この種、多室形空気調和機は、複数の室内ユニットと接
続され、前記室内ユニットは、任意に居住者が運転した
り停止したりするところから、電動1脹弁制御は、きめ
細かに制御することが望ましい。こうした従来の多室形
空気調和機の電動膨脹弁制御装置は、第2図に示すよう
な回路構成となっていた。すなわち、室外ユニット1の
内部に圧縮機2.冷媒の旅路を切り換える四方弁3゜室
外熱交換器4.冷媒の絞り機構および冷媒流量制御用の
電動膨脹弁5.6.7を設けている。そして、前記圧縮
機2は、室内ユニット8,9.10の各室内ユニットか
らの運転命令により駆動し、圧縮機2より吐出した冷媒
は前記四方弁3を通り、冷房時は前記室外熱交換器4に
より、暖房時は前記室内ユニット8,9.10にて凝縮
され、前記電動膨駄弁5,6.7により減圧され、冷房
時は前記各室内ユニット8,9.10で蒸発作用として
熱交換され、暖房時は前記室外熱交換器4で蒸発作用と
して熱交換されて、圧縮機2に戻るというヒートポンプ
式冷凍サイクルを形成している。また、前記電動膨脹弁
5,6.7は各室内ユニット8,9.10に対応してお
り、各室内ユニット8.9.10はそれぞれ室温検知用
サーミスタ11.12.13と、室温設定用リモコン1
4゜15.16を備えている。例えば室内ユニット8.
9.10のうち、運転しようとする室内ユニット8,9
が、前記室温設定用リモコン14゜15からの運転命令
を受信した場合、室内ユニット8,9は運転命令受信後
、前記室tM設定用リモコン14.15の室温設定値と
前記室温検知用サーミスタ11.12との温度差を検知
し、室内ユニットより信号線17を介してインバータ部
18に送信し、前記インバータ部18は温度差データと
、室内ユニット8.9の能力ランクから圧縮機2の運転
周波数を決定すると同時に、信号1s、19を介して1
脹弁開度決定装置20に室内ユニット8.9の能力ラン
ク値と、圧縮機2の運転周波数を伝えることにより、前
記1紐弁開度決定装置f20は、前記室内ユニット8,
9に対応する前記電動膨脹弁5.6の開度を決定する。
2. Description of the Related Art This type of multi-room air conditioner is connected to a plurality of indoor units, and the indoor units can be started or stopped at will by a resident, so electric one-inflation valve control requires detailed control. It is desirable to control the Such a conventional electric expansion valve control device for a multi-room air conditioner has a circuit configuration as shown in FIG. That is, the compressor 2. is installed inside the outdoor unit 1. Four-way valve that switches the path of refrigerant 3° Outdoor heat exchanger 4. A refrigerant throttling mechanism and an electric expansion valve 5.6.7 for controlling the refrigerant flow rate are provided. The compressor 2 is driven by an operation command from each of the indoor units 8, 9, and 10, and the refrigerant discharged from the compressor 2 passes through the four-way valve 3, and during cooling, the refrigerant is transferred to the outdoor heat exchanger. 4, during heating, it is condensed in the indoor units 8, 9.10, and the pressure is reduced by the electric expansion valves 5, 6.7, and during cooling, heat is exchanged as evaporation in the indoor units 8, 9.10. During heating, heat is exchanged as evaporation in the outdoor heat exchanger 4 and returned to the compressor 2, forming a heat pump type refrigeration cycle. Further, the electric expansion valves 5, 6.7 correspond to each indoor unit 8, 9.10, and each indoor unit 8.9.10 has a thermistor 11, 12, 13 for detecting room temperature, and a thermistor for setting room temperature, respectively. Remote control 1
It is equipped with 4°15.16. For example, indoor unit 8.
9. Out of 10, indoor units 8 and 9 to be operated
However, when an operation command is received from the room temperature setting remote controller 14, 15, the indoor units 8, 9, after receiving the operation command, set the room temperature setting value of the room tM setting remote controller 14, 15 and the room temperature detection thermistor 11. .12 is detected and transmitted from the indoor unit to the inverter unit 18 via the signal line 17, and the inverter unit 18 operates the compressor 2 based on the temperature difference data and the capacity rank of the indoor unit 8.9. 1 via the signal 1s, 19 at the same time as determining the frequency.
By transmitting the capacity rank value of the indoor unit 8.9 and the operating frequency of the compressor 2 to the expansion valve opening determination device 20, the one-string valve opening determination device f20 determines the indoor unit 8,
The opening degree of the electric expansion valve 5.6 corresponding to point 9 is determined.

そして冷房時は運転停止している室内ユニット10の電
動膨紐弁7は完全に閉止するようにしており、暖房時は
運転停止している室内ユニット10の電動膨紐弁7を完
全に閉止してしまうと、室内ユニット8,9が暖房運転
をしていて、そのため圧縮機2が運転しているので、長
時間この状態を続けると、各室内ユニット8,9.10
に設けられた室内熱交換器21.22.23のうち室内
ユニット10の室内熱交換器23内に冷媒が凝縮してし
まい、実際の冷凍サイクル上で使用される冷媒量が不足
し、全体の冷凍サイクルのバランスが崩れて、暖房能力
が満足に出なくなったり、圧縮機2の吐出温度が高くな
って、圧縮機2の保護制御が動作し、室外ユニット1の
運転を停止してしまうため、室内熱交換器23内に冷媒
が凝縮しないように、電動膨脹弁7は若干間いた状態に
していた。
During cooling, the electric expansion string valve 7 of the indoor unit 10 that is out of operation is completely closed, and during heating, the electric expansion string valve 7 of the indoor unit 10 that is out of operation is completely closed. If this happens, the indoor units 8, 9 will be in heating operation, and the compressor 2 will be in operation, so if this state continues for a long time, each indoor unit 8, 9, 10
Among the indoor heat exchangers 21, 22, and 23 installed in If the balance of the refrigeration cycle collapses and the heating capacity is not satisfactory, or the discharge temperature of the compressor 2 becomes high, the protection control of the compressor 2 is activated and the operation of the outdoor unit 1 is stopped. In order to prevent refrigerant from condensing in the indoor heat exchanger 23, the electric expansion valve 7 was left open for a while.

発明が解決しようとする課題 このような従来の多室形空気調和機の電動膨駄弁制御装
置の構成では、暖房運転時、他の室内ユニットが暖房運
転をしているとき、運転停止している室内ユニットの熱
交換器には常に若干の高圧、高温の冷媒が流れており、
したがって1本来その部屋の暖房は不要であるのに、熱
交換器から熱をロスしてしまうという課題があった。
Problems to be Solved by the Invention In the configuration of such a conventional electric expansion valve control device for a multi-room air conditioner, during heating operation, when other indoor units are performing heating operation, operation is stopped. A small amount of high-pressure, high-temperature refrigerant always flows through the heat exchanger of the indoor unit.
Therefore, there was a problem in that heat was lost from the heat exchanger even though heating the room was originally not necessary.

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もので、暖房運転時、他
の室内ユニットが運転しているときに、停止している室
内ユニットでの熱ロスをできるだけ少なくすることので
きる多室形空気調和機の電動1脹弁制御装置を提供する
ことを目的とするものである。
Means for Solving the Problems The present invention solves the above problems, and aims to minimize heat loss in an indoor unit that is stopped while other indoor units are operating during heating operation. The object of the present invention is to provide an electric single-inflation valve control device for a multi-room air conditioner that can perform the following functions.

作   用 本発明の多室形空気調和機の電動1級弁制御装置は、上
記目的を達成するために、−台の室外ユニットに複数の
室内ユニットを接続し、前記各室内ユニットには、室内
熱交換器温度検知用サーミスタを備え、前記室外ユニッ
トには前記各室内ユニットに対応する数の電動膨脹弁を
設け、暖房運転時、運転停止している室内ユニットの前
記室内熱交換器温度検知用サーミスタの検出値と、運転
中の室内ユニットの室内熱交換器温度検知用サーミスタ
の検出値を比較することにより、運転停止している室内
ユニットの室内熱交換器内に冷媒が一定量以上凝縮する
と、電動膨騒井を若干間いて、凝縮した冷媒を室外熱交
換器側に流し、凝縮した冷媒が一定量以下になると再び
電動膨脹弁は完全閉止することとなる。
Function: In order to achieve the above object, the electric first-class valve control device for a multi-room air conditioner of the present invention connects a plurality of indoor units to one outdoor unit, and each indoor unit has an indoor A thermistor for detecting heat exchanger temperature is provided, and the outdoor unit is provided with a number of electric expansion valves corresponding to the indoor units, and during heating operation, the indoor heat exchanger temperature is detected for the indoor unit that is not in operation. By comparing the detected value of the thermistor with the detected value of the indoor heat exchanger temperature detection thermistor of the indoor unit that is in operation, it is possible to detect if a certain amount of refrigerant has condensed in the indoor heat exchanger of the indoor unit that is not operating. , the electric expansion well is opened for a short time to allow the condensed refrigerant to flow to the outdoor heat exchanger side, and when the condensed refrigerant reaches a certain amount or less, the electric expansion valve is completely closed again.

実施例 以下、本発明の一実施例を第1図にもとづいて説明する
。なお、従来例と同一部分については同一番号を付けて
詳細な説明は省略する。
EXAMPLE Hereinafter, an example of the present invention will be described based on FIG. Note that the same parts as in the conventional example are given the same numbers and detailed explanations are omitted.

図に示すように、電動膨脹弁5,6.7の制御に対して
、各室内ユニット8,9.10のそれぞれの室内熱交換
器21,22.23には、それぞれ室内熱交換器温度検
知用サーミスタ24..25゜26を備え、この室内熱
交換器温度検知用サーミスタ24.25.26で検知し
た温度を信号線27を介して、室外ユニット1の1脹弁
開度決定装置20に送信するように構成する。
As shown in the figure, each indoor heat exchanger 21, 22.23 of each indoor unit 8, 9.10 has an indoor heat exchanger temperature sensor for controlling the electric expansion valve 5, 6.7. Thermistor 24. .. 25° 26, and is configured to transmit the temperature detected by the indoor heat exchanger temperature detection thermistor 24, 25, 26 to the 1-inflation valve opening determination device 20 of the outdoor unit 1 via a signal line 27. do.

上記構成において、例えば、室内ユニット8゜9が暖房
運転をしており、室内ユニット10が運転停止している
場合、最初は室内ユニット100室内熱交換器23内の
冷媒はガス状態で、冷媒の温度は圧縮4112の吐出温
度と冷媒の飽和蒸気温度のほぼ中間の温度であるが、室
内熱交換器23で室内の空気と徐々に熱交換されて、冷
媒のWJIは凝縮温度(飽和蒸気温度)まで下がり、前
記室内熱交換器23内で凝縮され、凝縮された冷媒は室
内熱交換器23の下方に溜まって(る。また各室内熱交
換器21,22.23の圧力は圧縮機2の吐出圧力にほ
ぼ近い状態で等しく、したがって、凝縮した冷媒の温度
は飽和蒸気状態であれば、暖房運転をしている室内ユニ
ット8.9の室内熱交換器21.22内で凝縮している
ものと、運転停止している室内ユニット10の室内熱交
換器23内で凝縮しているものは等しくなるので、運転
している室内ユニット8,9の室内熱交換器温度検出用
サーミスタ24.25の検出値と運転停止している室内
ユニット10の室内熱交換器温度検出用サーミスタ26
の検出値を比較することにより、運転停止している室内
ユニット10の室内熱交換器23内の冷媒の凝縮状態を
検知し、凝縮した冷媒が室内熱交換器23の下方に溜ま
って、室内熱交換器温度検知用サーミスタ26の検出値
が一定以下の温度になると、信号線27を介して1脹弁
開度決定装置20に送信し、電動膨瓶弁7を若干間いて
、凝縮した冷媒を室外熱交換器4側に流し、室内熱交換
器温度検知用サーミスタ26の検出値が一定以上の温度
になると、再び電動膨脹弁7は完全閉止するようにして
いるのである。
In the above configuration, for example, when the indoor unit 89 is in heating operation and the indoor unit 10 is not operating, the refrigerant in the indoor heat exchanger 23 of the indoor unit 100 is initially in a gas state; The temperature is approximately halfway between the discharge temperature of the compression 4112 and the saturated vapor temperature of the refrigerant, but as the heat is gradually exchanged with the indoor air in the indoor heat exchanger 23, the WJI of the refrigerant reaches the condensation temperature (saturated vapor temperature) The refrigerant cools down to the temperature of the indoor heat exchanger 23 and is condensed in the indoor heat exchanger 23, and the condensed refrigerant accumulates below the indoor heat exchanger 23. If the temperature of the condensed refrigerant is in a saturated vapor state, it is almost equal to the discharge pressure, and therefore the temperature of the condensed refrigerant is the one condensed in the indoor heat exchanger 21.22 of the indoor unit 8.9 in heating operation. Since the amount condensed in the indoor heat exchanger 23 of the indoor unit 10 that is not in operation is equal to Detection value and indoor heat exchanger temperature detection thermistor 26 of the indoor unit 10 that is not operating
By comparing the detection values of When the detected value of the exchanger temperature detection thermistor 26 reaches a certain temperature or lower, it is transmitted to the expansion valve opening determination device 20 via the signal line 27, and the electric expansion valve 7 is slightly closed to discharge the condensed refrigerant. When the temperature detected by the indoor heat exchanger temperature detection thermistor 26 exceeds a certain level, the electric expansion valve 7 is completely closed again.

発明の効果 以上の実施例から明らかなように、本発明によれば暖房
運転時、運転停止している室内ユニットの室内熱交換器
温度検知用サーミスタの検出値と運転中の室内ユニット
の室内熱交換器温度検知用サーミスタの検出値を比較し
て、運転停止している室内ユニットに対応する前記電動
膨駄弁の開度を制御するようにしたので、通常は運転停
止している室内ユニットに対応する電動膨脹弁は完全に
閉仕することができ、したがって熱ロスを最小限にする
ことができるという効果を有する多室形空気調和機の電
動1騒弁制御装置を提供できる。
Effects of the Invention As is clear from the above embodiments, according to the present invention, during heating operation, the detected value of the indoor heat exchanger temperature detection thermistor of the indoor unit that is not in operation and the indoor heat of the indoor unit that is in operation are By comparing the detection value of the exchanger temperature detection thermistor, the opening degree of the electric expansion valve corresponding to the indoor unit that is out of operation is controlled, so it is compatible with the indoor unit that is normally out of operation. An electric expansion valve control device for a multi-room air conditioner can be provided, which has the effect of completely closing the electric expansion valve, thereby minimizing heat loss.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例による多室形空気調和機の電
動1脹弁制御装置の冷凍サイクル図、第2図は従来の多
室形空気調和機の電動1脹弁制御装置の冷凍サイクル図
である。 1・・・・・・室外ユニット、2・・・・・・圧縮機、
5,6゜7・・・・・・電動膨脹弁、8.9.10・・
・・・・室内ユニット、21,22.23・・・・・・
室内熱交換器、24゜25.26・・・・・・室内熱交
換器温度検出用サーミスタ。 代理人の氏名 弁理士小蝦治 明ほか2名t−’?Lユ
ニーノド 2−・−圧縮機゛
Fig. 1 is a refrigeration cycle diagram of an electric one-inflation valve control device for a multi-chamber air conditioner according to an embodiment of the present invention, and Fig. 2 is a refrigeration cycle diagram for a conventional electric one-inflation valve control device for a multi-chamber air conditioner. It is a cycle diagram. 1...Outdoor unit, 2...Compressor,
5,6゜7...Electric expansion valve, 8.9.10...
...Indoor unit, 21,22.23...
Indoor heat exchanger, 24°25.26... Indoor heat exchanger temperature detection thermistor. Name of agent: Patent attorney Akira Koebi and two others t-'? L unit node 2--compressor

Claims (1)

【特許請求の範囲】[Claims] 一台の室外ユニットに複数の室内ユニットを接続し、前
記各室内ユニットには、室内熱交換器温度検知用サーミ
スタを備え、前記室外ユニットには前記各室内ユニット
に対応する数の電動膨脹弁を設け、暖房運転時、運転停
止している室内ユニットの前記室内熱交換器温度検知用
サーミスタの検出値と、運転中の室内ユニットの室内熱
交換器温度検知用サーミスタの検出値と比較して、運転
停止している室内ユニットに対応する前記電動膨脹弁の
開度を制御するように構成した多室形空気調和機の電動
膨脹弁制御装置。
A plurality of indoor units are connected to one outdoor unit, each of the indoor units is equipped with a thermistor for detecting the indoor heat exchanger temperature, and the outdoor unit is equipped with a number of electric expansion valves corresponding to the number of indoor units. provided, and during heating operation, compare the detection value of the indoor heat exchanger temperature detection thermistor of the indoor unit that is not operating with the detection value of the indoor heat exchanger temperature detection thermistor of the indoor unit that is in operation, An electric expansion valve control device for a multi-room air conditioner configured to control the opening degree of the electric expansion valve corresponding to an indoor unit that is out of operation.
JP2332529A 1990-11-28 1990-11-28 Electric expansion valve controller for multi-chamber type air-conditioning machine Pending JPH04198672A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2332529A JPH04198672A (en) 1990-11-28 1990-11-28 Electric expansion valve controller for multi-chamber type air-conditioning machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2332529A JPH04198672A (en) 1990-11-28 1990-11-28 Electric expansion valve controller for multi-chamber type air-conditioning machine

Publications (1)

Publication Number Publication Date
JPH04198672A true JPH04198672A (en) 1992-07-20

Family

ID=18255940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2332529A Pending JPH04198672A (en) 1990-11-28 1990-11-28 Electric expansion valve controller for multi-chamber type air-conditioning machine

Country Status (1)

Country Link
JP (1) JPH04198672A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555492A3 (en) * 2004-01-19 2006-06-07 Lg Electronics Inc. Method for controlling multi-type air conditioner
JP2008196775A (en) * 2007-02-13 2008-08-28 Sharp Corp Air conditioner
CN106016536A (en) * 2016-06-07 2016-10-12 张安 Single-compression-cylinder air conditioner and control method for refrigerants thereof
EP3647680A4 (en) * 2017-08-02 2020-07-01 Qingdao Haier Air-Conditioning Electronic Co., Ltd Method and device for controlling expansion valve
CN113834180A (en) * 2021-10-19 2021-12-24 宁波奥克斯电气股份有限公司 Self-adaptive method, device and system for multi-split long-connected pipe output
CN114688698A (en) * 2022-03-28 2022-07-01 青岛海尔空调器有限总公司 Accurate control method and device for air conditioner and storage medium thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555492A3 (en) * 2004-01-19 2006-06-07 Lg Electronics Inc. Method for controlling multi-type air conditioner
US7131283B2 (en) 2004-01-19 2006-11-07 Lg Electronics Inc. Method for controlling multi-type air conditioner
JP2008196775A (en) * 2007-02-13 2008-08-28 Sharp Corp Air conditioner
CN106016536A (en) * 2016-06-07 2016-10-12 张安 Single-compression-cylinder air conditioner and control method for refrigerants thereof
CN106016536B (en) * 2016-06-07 2018-11-30 张安 The control method of the refrigerant of single compression cylinder air-conditioning
EP3647680A4 (en) * 2017-08-02 2020-07-01 Qingdao Haier Air-Conditioning Electronic Co., Ltd Method and device for controlling expansion valve
CN113834180A (en) * 2021-10-19 2021-12-24 宁波奥克斯电气股份有限公司 Self-adaptive method, device and system for multi-split long-connected pipe output
CN113834180B (en) * 2021-10-19 2022-07-08 宁波奥克斯电气股份有限公司 Self-adaptive method, device and system for multi-split long-connected pipe output
CN114688698A (en) * 2022-03-28 2022-07-01 青岛海尔空调器有限总公司 Accurate control method and device for air conditioner and storage medium thereof
CN114688698B (en) * 2022-03-28 2024-06-04 青岛海尔空调器有限总公司 Air conditioner accurate control method and device and storage medium thereof

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