JP6138585B2 - Air conditioner - Google Patents
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- JP6138585B2 JP6138585B2 JP2013109470A JP2013109470A JP6138585B2 JP 6138585 B2 JP6138585 B2 JP 6138585B2 JP 2013109470 A JP2013109470 A JP 2013109470A JP 2013109470 A JP2013109470 A JP 2013109470A JP 6138585 B2 JP6138585 B2 JP 6138585B2
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Description
本発明は空気調和機の室内機について特に室内膨張弁の制御に技術に関する。 The present invention relates to a technique for controlling an indoor expansion valve, particularly for an indoor unit of an air conditioner.
本発明の従来技術として特許文献１に示すものがある。この特許文献１では、全開の開度で膨張弁がロックしたことを早期に判断するために、「冷凍サイクル装置Ｒは、圧縮機２６、凝縮器２７、膨張弁４４及び蒸発器１５を含む冷媒回路Ｒを備えたものであって、蒸発器１５における冷媒の過熱度の基づいて膨張弁４４の弁開度を制御する制御装置Ｃを備え、制御装置Ｃは、膨張弁４４の弁開度を全閉、若しくは、最小開度に制御している状態で、過熱度が所定の値より低く、且つ、一定時間その状態が継続した場合、膨張弁４４のロックと判断して所定の警報動作を実行する」と記載されている（要約参照）。 There exists a thing shown in patent document 1 as a prior art of this invention. In Patent Document 1, in order to determine at an early stage that the expansion valve is locked at the fully opened position, “refrigeration cycle apparatus R is a refrigerant including compressor 26, condenser 27, expansion valve 44, and evaporator 15. A circuit R is provided, and includes a control device C that controls the valve opening degree of the expansion valve 44 based on the degree of superheat of the refrigerant in the evaporator 15, and the control device C controls the valve opening degree of the expansion valve 44. If the degree of superheat is lower than a predetermined value and the state continues for a certain period of time while the valve is fully closed or controlled to the minimum opening, it is determined that the expansion valve 44 is locked and a predetermined alarm operation is performed. (See summary).
上記技術では膨張弁ロックしてしまった場合の対応についての技術であるが、膨張弁がロックしてしまうと空気調和機の制御が不可能になるので回避しすることが必要である。膨張弁のロックの原因の一つとして、きつく弁を閉めこんだ閉弁状態を保持したままにしておくと弁体が弁座に食いつき、ロック（固渋、固着とも言う）状態に至るというものがある。 In the above technique, the expansion valve is locked. However, if the expansion valve is locked, the air conditioner cannot be controlled, so it is necessary to avoid it. One of the causes of expansion valve locking is that if the valve is kept closed with the tight valve closed, the valve element will bite into the valve seat, leading to a locked (also known as solid, affixed) condition. There is.
そこで本発明では膨張弁のロックを抑制しつつ、冷媒の微少漏れによる結露水が室内機から吹出されることを抑制し、使用者に不快感を与えないようにすることを目的とする。 In view of the above, an object of the present invention is to prevent the condensed water from being blown out from the indoor unit while suppressing the lock of the expansion valve, so as not to cause discomfort to the user.
本願は上記課題を解決する手段を複数含んでいるが、その一例を挙げるならば、
「室内熱交換器、室内膨張弁、室内送風機をそれぞれ有する複数の室内機と、該複数の室内機と冷媒配管により接続され、圧縮機を備えた室外機と、を備えた空気調和機において、
冷房運転時において、
前記圧縮機が運転中である場合に、前記複数の室内機のうち停止中の室内機の室内膨張弁を全閉とし、
前記圧縮機が停止した場合に前記全閉とした室内機の室内膨張弁を所定の開度で開くように制御すること」を特徴とする。
The present application includes a plurality of means for solving the above problems.
In an air conditioner including a plurality of indoor units each having an indoor heat exchanger, an indoor expansion valve, and an indoor blower, and an outdoor unit that is connected to the plurality of indoor units by a refrigerant pipe and includes a compressor.
During cooling operation,
When the compressor is in operation, the indoor expansion valve of the stopped indoor unit among the plurality of indoor units is fully closed,
When the compressor is stopped, the indoor expansion valve of the indoor unit that is fully closed is controlled to open at a predetermined opening degree. "
本発明によれば、膨張弁のロックを抑制しつつ、冷媒の微少漏れによる結露水が室内機から吹出されることを抑制し、使用者に不快感を与えないようにすることができる。
上記した以外の課題、構成及び効果は、以下の実施形態の説明により明らかにされる。
ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the dew condensation water by the slight leak of a refrigerant | coolant blows off from an indoor unit, suppressing a lock of an expansion valve, and can make a user uncomfortable.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.
以下、実施例について、図面を用いて説明する。 Examples will be described below with reference to the drawings.
本発明の実施例を図１〜５にて説明する。
図１にマルチ型の空気調和機の冷凍サイクル系統図を示す。室外機に室内機３１、室内機３２が接続されている。図１では簡易的に２台のみの記載だが、室内機３、室内機４と複数台接続されていても良い。冷房運転時の場合、冷凍サイクルの冷媒の流れは、室外機の圧縮機１で高圧・高温に圧縮された冷媒は四方弁２を通過し室外熱交換器３で液冷媒に凝縮される。
An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a refrigeration cycle diagram of a multi-type air conditioner. An indoor unit 31 and an indoor unit 32 are connected to the outdoor unit. Although only two units are simply illustrated in FIG. 1, a plurality of indoor units 3 and 4 may be connected. In the cooling operation, the refrigerant flow in the refrigeration cycle is compressed into high pressure and high temperature by the compressor 1 of the outdoor unit, passes through the four-way valve 2, and is condensed into liquid refrigerant by the outdoor heat exchanger 3.
これが室外減圧装置４、受液器５を通り室外機を出て、液配管６、液管接続キット７を経由して、室内機３１と室内機３２に流れる。室内機内部では室内膨張弁８−１および８−２により低圧に膨張され、室内熱交換器９−１および９−２でガス冷媒に蒸発される。ガス管接続キット１０を経由してガス配管１１にて再び室外機に戻りこれを循環する。マルチ型の空気調和機の場合、室内機３１と室内機３２は各々個別に制御される。例えば室内機３１を空気調和機使用者が運転停止させた場合でも、保護制御により運転が禁止されている条件以外では室内壁２は運転することが可能である。このように圧縮機１を起点とする冷媒の循環は継続されることとなり停止させた室内機３１にも冷媒が流れ込んでくる虞がある。そこで本実施例の空気調和機においては、停止した室内機３１の室内膨張弁８−１は基本的には全閉し室内熱交換器９−１に流れないように制御する。この室内膨張弁８の制御方法については後に詳述する。 This leaves the outdoor unit through the outdoor decompression device 4 and the liquid receiver 5, and flows to the indoor unit 31 and the indoor unit 32 via the liquid pipe 6 and the liquid pipe connection kit 7. Inside the indoor unit, it is expanded to a low pressure by the indoor expansion valves 8-1 and 8-2 and evaporated to a gas refrigerant by the indoor heat exchangers 9-1 and 9-2. The gas pipe 11 is returned to the outdoor unit via the gas pipe connection kit 10 and then circulated. In the case of a multi-type air conditioner, the indoor unit 31 and the indoor unit 32 are individually controlled. For example, even when the air conditioner user stops the operation of the indoor unit 31, the indoor wall 2 can be operated except for the conditions where the operation is prohibited by the protection control. Thus, the circulation of the refrigerant starting from the compressor 1 is continued, and the refrigerant may flow into the stopped indoor unit 31. Therefore, in the air conditioner of the present embodiment, the indoor expansion valve 8-1 of the stopped indoor unit 31 is basically fully closed and controlled so as not to flow to the indoor heat exchanger 9-1. The method for controlling the indoor expansion valve 8 will be described in detail later.
図２には壁掛け型の室内機（３１、３２）の外観を示す。室内機（３１、３２）の中には室内熱交換器９、室内膨張弁８、室内送風機１４を配置し、室内送風機１４は送風機用モータ１５へ接続されている。室内膨張弁８、送風機用モータ１５は室内機の運転を制御する制御装置１６により制御される。送風機用モータ１５によって室内送風機１４が回転し室内空気は空気吸込口１７より吸い込まれ、室内熱交換器９を通過して空気吹出口１８より吹出される。 FIG. 2 shows the appearance of the wall-mounted indoor unit (31, 32). The indoor heat exchanger 9, the indoor expansion valve 8, and the indoor blower 14 are disposed in the indoor units (31, 32), and the indoor blower 14 is connected to the blower motor 15. The indoor expansion valve 8 and the blower motor 15 are controlled by a control device 16 that controls the operation of the indoor unit. The indoor blower 14 is rotated by the blower motor 15, and the room air is sucked in from the air suction port 17, passes through the indoor heat exchanger 9, and is blown out from the air outlet 18.
本実施例の空気調和機の室内機（３１、３２）は図２に示すように、壁に取り付けられる壁掛け型の室内機である。壁掛け型の室内機（３１、３２）では室内熱交換器９の伝熱面積を確保しつつ製品コンパクト化を実現させるために室内送風機１４を取り囲むように室内熱交換器９を配置している。また空気の流れに関しては熱交換器の下流側に室内送風機１４が位置している。すなわち、複数の室内機（３１、３２）はそれぞれ室内熱交換器９を通った後に室内送風機１４を介して室内に空調した空気を送風する。 As shown in FIG. 2, the indoor units (31, 32) of the air conditioner of the present embodiment are wall-mounted indoor units that are attached to a wall. In the wall-mounted indoor units (31, 32), the indoor heat exchanger 9 is disposed so as to surround the indoor blower 14 in order to realize a compact product while ensuring the heat transfer area of the indoor heat exchanger 9. Regarding the air flow, the indoor blower 14 is located downstream of the heat exchanger. That is, the plurality of indoor units (31, 32) blow air conditioned into the room via the indoor blower 14 after passing through the indoor heat exchanger 9, respectively.
図１のマルチ型の空気調和機は前述したとおり、冷房運転時に、室内機３１が停止していても室内機３２が冷房運転をすることができる。すなわち室外機の圧縮機１が運転している場合には室内機３１が停止していても冷媒配管を冷媒が循環している。このとき停止している室内機３１の室内膨張弁８−１が微開の状態であると冷媒が室内熱交換器９−１に流れ込んだ場合、微少冷媒により室内熱交換器９−１は徐々に冷却される。 As described above, the multi-type air conditioner of FIG. 1 can perform the cooling operation of the indoor unit 32 even when the indoor unit 31 is stopped during the cooling operation. That is, when the compressor 1 of the outdoor unit is operating, the refrigerant circulates through the refrigerant pipe even if the indoor unit 31 is stopped. At this time, if the indoor expansion valve 8-1 of the indoor unit 31 that is stopped is in a slightly open state, when the refrigerant flows into the indoor heat exchanger 9-1, the indoor heat exchanger 9-1 is gradually moved by the minute refrigerant. To be cooled.
この停止している室内機３１の室内送風機１４は停止していて空気の流れは無いが、室内送風機１４を取り囲むように配置された室内熱交換器９−１が冷却されるので、その輻射熱で室内送風機１４も冷却される。すると室内送風機１４の周囲の空気に含まれる水分が凝縮され結露水となって室内送風機１４の表面に付着する。この状態で室内機３１の運転を再開すると、室内送風機１４が回転することで、その表面に付着した結露水は空気吹出口１８より室内機外に排出されてしまう。 Although the indoor blower 14 of the stopped indoor unit 31 is stopped and there is no air flow, the indoor heat exchanger 9-1 disposed so as to surround the indoor blower 14 is cooled. The indoor blower 14 is also cooled. Then, moisture contained in the air around the indoor blower 14 is condensed and becomes condensed water and adheres to the surface of the indoor blower 14. When the operation of the indoor unit 31 is resumed in this state, the indoor blower 14 rotates, and the condensed water adhering to the surface is discharged from the air blower outlet 18 to the outside of the indoor unit.
図２に示すような壁掛け型の室内機においては特に、冷房運転の場合、冷媒が室内熱交換器９を通過すると室内熱交換器９は冷たくなり、室内送風機１４も冷やされることになるため、上記した結露水の排出の虞がある。このように結露水が空気吹出口２８より飛び出し、これにより使用者に不快感を与える虞があった。 Especially in the wall-mounted indoor unit as shown in FIG. 2, in the cooling operation, when the refrigerant passes through the indoor heat exchanger 9, the indoor heat exchanger 9 becomes cold and the indoor blower 14 is also cooled. There is a risk of the above-mentioned condensation water being discharged. As described above, the condensed water jumps out from the air outlet 28, which may cause discomfort to the user.
図３では室内膨張弁８の簡略断面図を示す。冷媒入口２２から冷媒出口２３に流れる場合、膨張弁モータ１９によってニードル弁２０を上下させ、弁座２１との隙間量を変化させることによって冷媒流量を調節する。冷媒を流さないようにするためには完全に閉弁させるようにニードル弁２０を弁座２１に押し付けるようにする。 FIG. 3 shows a simplified cross-sectional view of the indoor expansion valve 8. When the refrigerant flows from the refrigerant inlet 22 to the refrigerant outlet 23, the needle valve 20 is moved up and down by the expansion valve motor 19, and the amount of the gap with the valve seat 21 is changed to adjust the refrigerant flow rate. In order to prevent the refrigerant from flowing, the needle valve 20 is pressed against the valve seat 21 so as to be completely closed.
しかしながらこの状態が長く続くと温度変化等で、ニードル弁２０が弁座２１に食い付いてしまい、開弁させようと膨張弁モータ１９によってニードル弁２０を上方向に駆動させても動かなくなってしまうことがある。これをロック状態または固渋、固着と呼び、本来の冷媒流量調整が不可となり空気調和機の故障を招く虞が生じる。 However, if this state continues for a long time, the needle valve 20 bites into the valve seat 21 due to a temperature change or the like, and even if the needle valve 20 is driven upward by the expansion valve motor 19 to open the valve, the needle valve 20 does not move. Sometimes. This is called a locked state, solid astringency, and sticking, and the original refrigerant flow rate adjustment becomes impossible, which may cause a failure of the air conditioner.
ここで上記した微少冷媒の流れで室内送風機１４の表面に結露水が付着することを抑制するためには室内膨張弁８を全閉することが必要であるが、一方で図３で記述したように、閉弁状態が長く続くと室内膨張弁８の信頼性を損なうことにもなりかねない。 The indoor expansion valve 8 needs to be fully closed in order to suppress the condensation water from adhering to the surface of the indoor blower 14 due to the flow of the minute refrigerant described above. However, as described in FIG. In addition, if the valve closing state continues for a long time, the reliability of the indoor expansion valve 8 may be impaired.
この相反する事象を解決するために本発明者等は、室内膨張弁８に関して図４に示す制御を考案するに至ったものである。室内機（３１、３２）が運転している場合には室内機（３１、３２）および室外機の各種検知温度や圧力等による情報で室内膨張弁（８−１、８−２）の開度を決定する。ここで室内機３１が停止したとすると、室外機の圧縮機１が運転しているかどうかの情報を入手して、もし圧縮機１が運転している場合には停止した室内機３１の室内熱交換器９−１に冷媒が流れ込まないように室内膨張弁８−１を全閉とする。このとき圧縮機１が停止している場合には冷媒の流れは無いため室内膨張弁８−１のロックを避ける目的で室内膨張弁８−１の開度を微開に設定する。 In order to solve this contradictory phenomenon, the inventors have devised the control shown in FIG. 4 for the indoor expansion valve 8. When the indoor unit (31, 32) is in operation, the opening degree of the indoor expansion valve (8-1, 8-2) based on information based on various detected temperatures and pressures of the indoor unit (31, 32) and the outdoor unit To decide. If the indoor unit 31 is stopped here, information on whether or not the compressor 1 of the outdoor unit is operating is obtained, and if the compressor 1 is operating, the indoor heat of the stopped indoor unit 31 is acquired. The indoor expansion valve 8-1 is fully closed so that the refrigerant does not flow into the exchanger 9-1. At this time, when the compressor 1 is stopped, there is no refrigerant flow, so that the opening of the indoor expansion valve 8-1 is set to be slightly open in order to avoid locking the indoor expansion valve 8-1.
圧縮機１の運転状態が変わった場合にはその都度、室内膨張弁８の開度設定を変更する。すなわち、圧縮機１が運転開始すれば、停止した室内機３１の室内膨張弁８−１の開度は全閉とし、圧縮機１の運転が停止すれば停止した室内機３１の室内膨張弁８−１の開度を微開とするように制御する。このように室内膨張弁８の全閉時間を極力、減少させることで室内膨張弁８がロックする虞を抑制させることができる。 Whenever the operating state of the compressor 1 changes, the opening degree setting of the indoor expansion valve 8 is changed. That is, when the compressor 1 starts operation, the opening of the indoor expansion valve 8-1 of the stopped indoor unit 31 is fully closed, and when the operation of the compressor 1 stops, the indoor expansion valve 8 of the stopped indoor unit 31 is stopped. The opening of -1 is controlled to be slightly opened. Thus, the possibility that the indoor expansion valve 8 is locked can be suppressed by reducing the fully closed time of the indoor expansion valve 8 as much as possible.
以上に説明したように本実施例の空気調和機は、室内熱交換器９、室内膨張弁８、室内送風機１４をそれぞれ有する複数の室内機（３１、３２）と、複数の室内機（３１、３２）と冷媒配管（６、１１）により接続され、圧縮機１を備えた室外機と、を備えたことを前提としている。そして冷房運転時において、圧縮機１が運転中である場合に、複数の室内機（３１、３２）のうち停止中の室内機３１の室内膨張弁８−１を全閉とする。さらに圧縮機１が停止した場合に全閉とした室内機３１の室内膨張弁８−１を所定の開度（微開）で開くように制御するものである。 As described above, the air conditioner of the present embodiment includes a plurality of indoor units (31, 32) each having the indoor heat exchanger 9, the indoor expansion valve 8, and the indoor blower 14, and a plurality of indoor units (31, 31). 32) and the refrigerant pipe (6, 11), and an outdoor unit provided with the compressor 1 is assumed to be provided. During the cooling operation, when the compressor 1 is in operation, the indoor expansion valve 8-1 of the stopped indoor unit 31 among the plurality of indoor units (31, 32) is fully closed. Further, when the compressor 1 is stopped, the indoor expansion valve 8-1 of the indoor unit 31 that is fully closed is controlled to open at a predetermined opening (slightly opened).
なお、圧縮機１が停止した場合には、複数の室内機（３１、３２）の全ての室内膨張弁８を所定の開度（微開）で開くように制御することが望ましい。これにより複数の室内機（３１、３２）の全てにおいて室内膨張弁８のロックを防止することが可能となる。 In addition, when the compressor 1 stops, it is desirable to control so that all the indoor expansion valves 8 of the plurality of indoor units (31, 32) are opened at a predetermined opening (slightly opened). This makes it possible to prevent the indoor expansion valve 8 from being locked in all of the plurality of indoor units (31, 32).
図５に天井埋込型のカセットタイプと言われる４方向に空気を吹き出すタイプの室内機の構造を示す。送風機用モータ２４によって回転する送風機２５を取り巻くように室内熱交換器２６は配置され、送風機の下には風路を形成するためのベルマウス２９および制御機器を内蔵する電気品箱３０をベルマウスの一部を配置する。空気吸込口２７から吸い込まれた空気は送風機２５を通り、室内熱交換器２６を通過後、空気吹出口２８より室内機機外に排出される。 FIG. 5 shows the structure of an indoor unit that blows air in four directions, which is called a ceiling-embedded cassette type. An indoor heat exchanger 26 is arranged so as to surround a blower 25 that is rotated by a blower motor 24, and a bell mouth 29 for forming an air passage and an electrical component box 30 incorporating a control device are placed under the bell mouth. Place a part of. The air sucked from the air suction port 27 passes through the blower 25, passes through the indoor heat exchanger 26, and is then discharged from the air blower outlet 28 to the outside of the indoor unit.
図５の室内機が停止している状態で室内膨張弁が微開の状態となると、冷媒が室内熱交換器２６に流れるため、室内熱交換器２６によって送風機２５、ベルマウス２６、電気品箱３０が冷却される。するとこれらの部品の表面に結露水が付着し、この状態が長く継続されると結露水の量が多くなり空気吸込口２７より落下に至る。このため、このような４方向への吹出すタイプの室内機においても本実施例では圧縮機が運転状態では膨張弁を全閉にすることで冷媒の流入を止めるため、結露水の落下を防ぐことが可能となる。 When the indoor expansion valve is slightly opened while the indoor unit in FIG. 5 is stopped, the refrigerant flows into the indoor heat exchanger 26. Therefore, the indoor heat exchanger 26 causes the blower 25, the bell mouth 26, and the electrical component box. 30 is cooled. Then, condensed water adheres to the surfaces of these components, and when this state continues for a long time, the amount of condensed water increases and falls from the air suction port 27. For this reason, even in such an indoor unit that blows out in four directions, in the present embodiment, when the compressor is in an operating state, the expansion valve is fully closed to stop the inflow of refrigerant, thus preventing the condensation water from falling. It becomes possible.
１・・・・・圧縮機
２・・・・・四方弁
３・・・・・室外熱交換器
４・・・・・室外減圧装置
５・・・・・受液器
６・・・・・液配管
７・・・・・液管接続キット
８・・・・・室内膨張弁
９・・・・・室内熱交換器
１０・・・・・ガス管接続キット
１１・・・・・ガス配管
１４・・・・・室内送風機
１５・・・・・送風機用モータ
１６・・・・・制御装置
１７・・・・・空気吸込口
１８・・・・・空気吹出口
１９・・・・・膨張弁モータ
２０・・・・・ニードル弁
２１・・・・・弁座
２２・・・・・冷媒入口
２３・・・・・冷媒出口
２４・・・・・送風機用モータ
２５・・・・・送風機
２６・・・・・室内熱交換器
２７・・・・・空気吸込口
２８・・・・・空気吹出口
２９・・・・・ベルマウス
３０・・・・・電気品箱
３１、３２・・室内機
DESCRIPTION OF SYMBOLS 1 ... Compressor 2 ... Four-way valve 3 ... Outdoor heat exchanger 4 ... Outdoor decompression device 5 ... Liquid receiver 6 ... Liquid piping 7 ... Liquid pipe connection kit 8 ... Indoor expansion valve 9 ... Indoor heat exchanger 10 ... Gas pipe connection kit 11 ... Gas pipe 14・ ・ ・ ・ ・ Indoor blower 15 ... Blower motor 16 ... Control device 17 ... Air inlet 18 ... Air outlet 19 ... Expansion valve Motor 20 ... Needle valve 21 ... Valve seat 22 ... Refrigerant inlet 23 ... Refrigerant outlet 24 ... Blower motor 25 ... Blower 26・ ・ ・ ・ ・ Indoor heat exchanger 27 …… Air inlet 28 …… Air outlet 29 …… Belmouth 30… Electric box 3 1, 32 ... Indoor unit
Claims (4)
冷房運転時において、
前記圧縮機が運転中である場合に、前記複数の室内機のうち停止中の室内機の室内膨張弁を全閉とし、
前記圧縮機が停止した場合に前記全閉とした室内機の室内膨張弁を所定の開度で開くように制御することを特徴とする空気調和機。 In an air conditioner including a plurality of indoor units each having an indoor heat exchanger, an indoor expansion valve, and an indoor fan, and an outdoor unit connected to the plurality of indoor units by a refrigerant pipe and including a compressor,
During cooling operation,
When the compressor is in operation, the indoor expansion valve of the stopped indoor unit among the plurality of indoor units is fully closed,
An air conditioner that controls to open an indoor expansion valve of the indoor unit that is fully closed at a predetermined opening when the compressor is stopped.
冷房運転時において、
前記圧縮機が停止した場合に、前記複数の室内機の全ての室内膨張弁を所定の開度で開くように制御することを特徴とする空気調和機。 In the air conditioner according to claim 1,
During cooling operation,
An air conditioner that controls to open all the indoor expansion valves of the plurality of indoor units at a predetermined opening when the compressor is stopped.
前記複数の室内機は壁に取り付けられる壁掛け型の室内機であることを特徴とする空気調和機。 In the air conditioner according to claim 1,
The air conditioner characterized in that the plurality of indoor units are wall-mounted indoor units attached to a wall.
前記複数の室内機はそれぞれ前記室内熱交換器を通った後に前記室内送風機を介して室内に空気を送風する室内機であることを特徴とする空気調和機。 In the air conditioner according to claim 1,
Each of the plurality of indoor units is an indoor unit that blows air into the room through the indoor blower after passing through the indoor heat exchanger.
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| CN109945431A (en) * | 2019-03-20 | 2019-06-28 | 珠海格力电器股份有限公司 | Temperature adjusting method, device and system and air conditioner |
| CN111094876A (en) * | 2017-08-29 | 2020-05-01 | 东芝开利株式会社 | Multi-connected air conditioning system and indoor unit |
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| CN106871419B (en) * | 2017-02-13 | 2019-08-30 | 广东美的暖通设备有限公司 | Fan coil units and its condensation prevention control method and device |
| JP7519176B2 (en) * | 2019-09-12 | 2024-07-19 | ダイキン工業株式会社 | Air Conditioning System |
| JP7457966B2 (en) * | 2020-02-20 | 2024-03-29 | パナソニックＩｐマネジメント株式会社 | air conditioner |
| CN114279043B (en) * | 2021-12-08 | 2022-11-25 | 珠海格力电器股份有限公司 | Refrigerant shortage processing method and device, multi-split air conditioner and storage medium |
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| JPH08123554A (en) * | 1994-10-24 | 1996-05-17 | Matsushita Seiko Co Ltd | Controller for flow rate valve |
| JP2009041831A (en) * | 2007-08-08 | 2009-02-26 | Panasonic Corp | Multi-room type air conditioner |
| JP5017214B2 (en) * | 2008-08-25 | 2012-09-05 | 日立アプライアンス株式会社 | Air conditioner and control method thereof |
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| CN111094876A (en) * | 2017-08-29 | 2020-05-01 | 东芝开利株式会社 | Multi-connected air conditioning system and indoor unit |
| CN109945431A (en) * | 2019-03-20 | 2019-06-28 | 珠海格力电器股份有限公司 | Temperature adjusting method, device and system and air conditioner |
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