JPH0285647A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH0285647A JPH0285647A JP63235428A JP23542888A JPH0285647A JP H0285647 A JPH0285647 A JP H0285647A JP 63235428 A JP63235428 A JP 63235428A JP 23542888 A JP23542888 A JP 23542888A JP H0285647 A JPH0285647 A JP H0285647A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- temperature
- expansion valve
- indoor heat
- indoor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 239000003507 refrigerant Substances 0.000 claims abstract description 25
- 230000007423 decrease Effects 0.000 claims abstract description 6
- 238000004781 supercooling Methods 0.000 claims description 11
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000004378 air conditioning Methods 0.000 abstract description 4
- 238000013459 approach Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は分離型の空気−和機に関するものである。[Detailed description of the invention] <Industrial application field> The present invention relates to a separate type air conditioner.
く従来の技術〉
従来用いられている冷凍サイクルをもつこの種の空気調
和機とは、定出力コンプレッサの冷媒制御はキャピラリ
ーチューブ又は膨脹弁を採用していた（例えば、特公昭
６２−３７３０７号公報参照）。Conventional technology> This type of air conditioner with a refrigeration cycle that has been used conventionally uses a capillary tube or an expansion valve to control the refrigerant of a constant output compressor (for example, Japanese Patent Publication No. 37307/1983). reference).
〈発明が解決しようとする課題〉
しかしながら、この場合のキャピラリーチューブは制御
範囲が限られており、室内・外気温の各種条件に対応で
きず、他の制御との組Ｊｊ合せで制御していた。また、
この膨脹弁においては、過熱度のみの制御となり、より
きめ細かな制御は不可能であった。<Problem to be solved by the invention> However, the capillary tube in this case has a limited control range, cannot respond to various indoor and outdoor temperature conditions, and is controlled in combination with other controls. . Also,
In this expansion valve, only the degree of superheating was controlled, and more detailed control was not possible.
本発明は上記実情に鑑み、暖房の立上り特性の改善、冷
房の立上り特性の改善、配管長の変化に対しても冷媒制
御を可能とし、空調性の改善を図る空気調和機を提供す
ることを［１的と〔たものである。In view of the above-mentioned circumstances, it is an object of the present invention to provide an air conditioner that improves the heating start-up characteristics, improves the cooling start-up characteristics, and enables refrigerant control even with changes in piping length, thereby improving air conditioning performance. [It is one thing].
く課題を解決するだめの手段〉
本発明は、圧縮機と冷暖流路切換弁と室内熱交換器と電
気式膨脂弁と室外熱交換器とで冷凍サイクルを構成した
ヒートポンプ式空気調和機において、暖房運転時に室内
温度又は室内熱交換器の温度若しくは冷媒圧力が上昇す
るにつれて室内熱交換器の過冷却度が下がるように前記
電気式膨脂弁の弁開度を調整する制御手段を設けたもの
である。Means for Solving the Problems The present invention provides a heat pump air conditioner in which a refrigeration cycle is configured by a compressor, a cooling/heating flow path switching valve, an indoor heat exchanger, an electric fat expansion valve, and an outdoor heat exchanger. A control means is provided for adjusting the valve opening degree of the electric fat expansion valve so that the degree of subcooling of the indoor heat exchanger decreases as the indoor temperature, the temperature of the indoor heat exchanger, or the refrigerant pressure increases during heating operation. It is something.
また、圧縮機と室外熱交換器と電気式膨脂弁と室内熱交
換器とで冷凍サイクルを構成した空気調和機において、
冷房運転時に室外熱交換器の温度若しくは冷媒圧力が上
昇するにつれて室外熱交換器の過冷却度が下がるように
、前記電気式膨脂弁の弁開度を調節する制御手段を設け
たものである。In addition, in an air conditioner that has a refrigeration cycle composed of a compressor, an outdoor heat exchanger, an electric fat expansion valve, and an indoor heat exchanger,
A control means is provided for adjusting the valve opening degree of the electric fat expansion valve so that the degree of subcooling of the outdoor heat exchanger decreases as the temperature or refrigerant pressure of the outdoor heat exchanger increases during cooling operation. .
く作用〉
上記のような構成のために、暖房時の冷媒の流は圧縮機
から四方弁よりなる冷暖流路を介し室内熱交換器、電気
式膨脹弁、室外熱交換器へと流れる。この場合、室内熱
交換器の中間と出口にセンサーを取付けその温度差で過
冷却度を検知し、これに伴い電気式膨脂弁を、制御手段
をもって所定の動作線に従い制御し、室温が低い状態で
は過冷却を大きく取り暖房能力を増大させ、室温が設定
温度に接近するに従い過冷却度を小さくし暖房能力を減
少させる。また、室内、室外ユニット間の配管長の変化
に対しても室外熱交換器の中間と出口のセンサーとの温
度差（冷房運転時）で過冷却を検知し、電気式膨脂弁を
制御し所定の冷房能力を得るようにする。Due to the above-described configuration, the refrigerant flow during heating flows from the compressor to the indoor heat exchanger, the electric expansion valve, and the outdoor heat exchanger via a cooling/heating flow path consisting of a four-way valve. In this case, a sensor is installed between the middle and the outlet of the indoor heat exchanger to detect the degree of supercooling based on the temperature difference, and accordingly, the electric fat expansion valve is controlled by a control means according to a predetermined operating line, so that the room temperature is low. In this state, supercooling is increased to increase heating capacity, and as the room temperature approaches the set temperature, the degree of supercooling is reduced and heating capacity is reduced. In addition, when the pipe length changes between the indoor and outdoor units, supercooling is detected based on the temperature difference between the intermediate and outlet sensors of the outdoor heat exchanger (during cooling operation), and the electric fat expansion valve is controlled. Ensure that the specified cooling capacity is obtained.
また、暖房時の微風運転における吹田空気温度の高まり
に対しても、電気式膨脂弁の開度を大きくし前記温度を
適宜下げることもできる。Furthermore, in response to an increase in Suita air temperature during gentle wind operation during heating, the temperature can be appropriately lowered by increasing the opening degree of the electric fat expansion valve.
〈実施例〉
以下、本発明を実施例の図面に基ずいて説明すれば、次
の通りである。<Example> The present invention will be described below based on the drawings of the example.
第１図は冷暖房用空気調和機の冷媒回路図であり、１は
室外ユニットＡ内の冷媒の圧縮機で、この吐出管部に四
方弁となる冷暖流路切換弁２を接続し、該冷暖流路切換
弁２の一方に室内ユニットＢの室内熱交換器３を接続し
、この他端に電気式膨脂弁４を接続し、該電気式膨脂弁
４の他端を室外ユニットＡ側のキャピラリーチューブ５
を介し室外熱交換器６に接続し、この他端を前記冷暖流
路切換弁２の他方を経て気液分離器７に導き圧縮機１に
戻る循環路を形成するものである。８は室内ユニットＡ
に設けた制御手段で、該制御手段８には、室内熱交換器
３の中間に設けたセンサーＴ、と暖房時の出口のセンサ
ーＴ２及電気式膨脹弁４の出口のセンサーＴ町を接続す
ると共に、室外熱交換器６の中間に設けたセンサーＴ、
と入口のセンサーＴ４を接続しており、制御手段８から
発せられる制御信号により電気式膨脂弁４の弁開度が調
整される。FIG. 1 is a refrigerant circuit diagram of an air conditioner for air conditioning and heating. 1 is a refrigerant compressor in an outdoor unit A, and a cooling/heating flow path switching valve 2 serving as a four-way valve is connected to this discharge pipe section. The indoor heat exchanger 3 of the indoor unit B is connected to one end of the flow path switching valve 2, the electric fat expansion valve 4 is connected to the other end of the flow path switching valve 2, and the other end of the electric fat expansion valve 4 is connected to the outdoor unit A side. capillary tube 5
The other end is connected to the outdoor heat exchanger 6 via the cooling/heating flow path switching valve 2, and is led to the gas-liquid separator 7 to form a circulation path back to the compressor 1. 8 is indoor unit A
The control means 8 is connected to a sensor T provided in the middle of the indoor heat exchanger 3, a sensor T2 at the outlet during heating, and a sensor T2 at the outlet of the electric expansion valve 4. In addition, a sensor T provided in the middle of the outdoor heat exchanger 6,
and an inlet sensor T4, and the valve opening degree of the electric fat expansion valve 4 is adjusted by a control signal issued from the control means 8.
次にこの作用を説明すれば、先ず暖房時、圧縮機１にて
圧縮された高圧冷媒は、冷暖流路切換弁２から室内熱交
換器３に流れ、電気式膨脂弁４を経て室外側のキャピラ
リーチューブ５゜室外熱交換器６から前記冷暖流路切換
弁２の一方より気液分離器７を経て圧縮機１に戻り、前
記室内熱交換器３の冷媒凝縮熱で室内を暖めるものであ
る。Next, to explain this effect, first, during heating, the high-pressure refrigerant compressed by the compressor 1 flows from the cooling/heating flow path switching valve 2 to the indoor heat exchanger 3, passes through the electric fat expansion valve 4, and then goes to the outdoor side. The capillary tube 5° returns from the outdoor heat exchanger 6 to one side of the cooling/heating flow path switching valve 2 through the gas-liquid separator 7 to the compressor 1, and heats the room with the refrigerant condensation heat of the indoor heat exchanger 3. be.
ここにおいて、室温が低い状態では、過冷却を大きくと
り暖房能力を増大させ、室温が設定温度に接近するに従
い過冷却度を小さくし暖房能力を減少させねばならない
。このため、第４図に示すように、凝縮温度（凝縮圧力
又は室内温度でも良い）を室内熱交換器３の中間のセン
サーＴ１で検出して、このセンサーＴ１とセンサーＴ２
の温度差で過冷却度（ＴＩ ７２）を検知し、第３図
に示す過冷却制御動作図に従って電気式膨脂弁４を制御
手段８て制御する。かかる過冷却制御として、常連はＹ
、とＹ２の動作範囲内に納まるよう膨張弁４がコントロ
ールされるが、室温が設定値に近づいたらＹｌ。Here, when the room temperature is low, the heating capacity must be increased by increasing supercooling, and as the room temperature approaches the set temperature, the degree of supercooling must be reduced and the heating capacity must be reduced. Therefore, as shown in FIG. 4, the condensing temperature (condensing pressure or indoor temperature may be used) is detected by the sensor T1 located between the indoor heat exchanger 3 and the sensor T1 and the sensor T2.
The degree of supercooling (TI 72) is detected based on the temperature difference between , and the electric fat expansion valve 4 is controlled by the control means 8 according to the supercooling control operation diagram shown in FIG. As such supercooling control, Y
, and the expansion valve 4 is controlled to stay within the operating range of Y2, but when the room temperature approaches the set value, Yl.
Ｙ２からｙ、、ｙ４動作線に移し、このＹ３゜Ｙ４の移
動範囲内に納まるように膨張弁４がコントロールされる
と更に好ましい。It is more preferable that the expansion valve 4 is controlled so as to move from Y2 to y, y4 operation line and stay within the movement range of Y3°Y4.
一方、ユニット間配管９ａ、９ｂの長さが短く冷媒充填
量が充分にある場合は、冷房運転時に第４図の示すよう
に凝縮温度若しくは凝縮圧力を室外熱交換器６の中間の
センサーＴ３で検出してセンサーＴ４との温度差で過冷
却（Ｔ ３−Ｔ４）を検知し、第３図のＹ、、Ｙ２の動
作線（この場合、第３図の横軸は凝縮温度又は凝縮圧力
のみとなる）に従って電気式膨脹弁４を制御する。この
ようにすると冷房能力が増大する。但し、冷房時の冷媒
流れは、第１図において圧縮機１から冷暖流路切換弁２
を経て室外熱交換器６．キャピラリーチューブ５．電気
式膨脹弁４．室内熱交換器３を通り、前記冷暖流路切換
弁２．気液分離器７へと流れる。On the other hand, if the length of the inter-unit piping 9a, 9b is short and there is a sufficient amount of refrigerant charged, the condensing temperature or condensing pressure is measured by the sensor T3 located in the middle of the outdoor heat exchanger 6 as shown in FIG. 4 during cooling operation. The operating line of Y, Y2 in Fig. 3 (in this case, the horizontal axis in Fig. 3 is only the condensing temperature or condensing pressure). The electric expansion valve 4 is controlled according to the following. This increases the cooling capacity. However, the refrigerant flow during cooling is from the compressor 1 to the cooling/heating flow path switching valve 2 in Fig. 1.
6. Through the outdoor heat exchanger. Capillary tube5. Electric expansion valve 4. Passing through the indoor heat exchanger 3, the heating/cooling flow path switching valve 2. It flows to the gas-liquid separator 7.
この冷房運転時の制御は、第２図に示す冷房専用の空気
調和機にも適用できる。この場合の空気１調和機は、室
外ユニットＡに圧縮機１から室外熱交換器６．電気式膨
脹弁４を接続し、該電気式膨脹弁４に室内ユニットＢの
キャピラリーチューブ５．室内熱交換器３を接続し、更
にこの先に前記室外ユニットＡの気液分離器７から圧縮
機１に戻る循環路を構成し、冷媒は圧縮機１から室外熱
交換器６．電気式膨脹弁４．キャピラリーチューブ５．
室内熱交換器３へと流れる。This control during cooling operation can also be applied to the cooling-only air conditioner shown in FIG. In this case, the air conditioner 1 connects the outdoor unit A with the compressor 1 and the outdoor heat exchanger 6. Connect the electric expansion valve 4 to the capillary tube 5 of the indoor unit B. The indoor heat exchanger 3 is connected, and further a circulation path is formed which returns from the gas-liquid separator 7 of the outdoor unit A to the compressor 1, and the refrigerant is passed from the compressor 1 to the outdoor heat exchanger 6. Electric expansion valve 4. Capillary tube5.
It flows to the indoor heat exchanger 3.
また、配管長の変化に対して冷房制御を可能とする。先
ず予めユニット内に冷媒を多めにチャージし長配管時も
現地で追加チャージをさせないとき、その冷媒チャージ
を極力少なくするためには、配管内の冷媒状態を液がス
ニ相流とする必要がある。しかし、配管内の圧力を低圧
とすると長配管の場合圧力損失の影響が大きい。It also enables cooling control with respect to changes in pipe length. First of all, if you charge a large amount of refrigerant in the unit in advance and do not require additional charging on-site even when using long piping, in order to minimize the refrigerant charge, the refrigerant state in the piping must be in a monophase flow. . However, if the pressure inside the piping is kept low, the effect of pressure loss will be large in the case of long piping.
この場合、室外ユニットＡ、室内ユニッｌ−Ｂの両方に
絞り機構を設け、その内生なくとも一方に電気式膨脹弁
４を利用してユニット間配管内を中間圧力とし、長配管
時にも圧力損失を極力少なくし、しかも現地での冷媒追
加チャージを不要とする。このようにユニット配管内の
圧力を電気式膨脹弁４でコントロールし適切な中間圧力
とする。このときは、室内側又は室外側のユニオン部の
パイプ温度（センサーＴ、）を検知しそれを圧力換算し
て電気式膨脹弁４を調節する。In this case, a throttling mechanism is provided in both the outdoor unit A and the indoor unit I-B, and an electric expansion valve 4 is used in at least one of them to maintain an intermediate pressure in the piping between the units, even when the piping is long. It minimizes losses and eliminates the need for additional refrigerant charging on site. In this way, the pressure inside the unit piping is controlled by the electric expansion valve 4 to maintain an appropriate intermediate pressure. At this time, the pipe temperature (sensor T) of the union section on the indoor side or the outdoor side is detected, converted into pressure, and the electric expansion valve 4 is adjusted.
更に、空調性については、暖房時、弱風運転すると吹出
空気温度が高くなり上昇気流となって暖気が床まで届か
ず、部屋の温度分布が悪くなる。また、その暖気が直接
吸い込まれてエアーショートとなり各種の障害を引き起
こす原因となる。このことは、第５図の冷房、暖房運転
開始のフローチャートでも分かる。同図中ｔ１は冷気ド
ラフトを感じさせない吹出し空気温度で、１．の饋は風
量の大小によって変えておく。Furthermore, regarding air conditioning, if the room is operated with low wind during heating, the temperature of the blown air will be high, creating an upward airflow that will prevent the warm air from reaching the floor, resulting in poor temperature distribution in the room. Moreover, the warm air is directly sucked in, causing an air short and causing various problems. This can also be seen in the flowchart of FIG. 5 for starting cooling and heating operations. In the figure, t1 is the temperature of the blown air at which no cold air draft is felt; 1. Change the amount of air flow depending on the amount of airflow.
また、ｔ２は暖気の所定の位置まで達するに必要な最大
の吐出し温度で、該ｔ２は風量の大小によって変えてお
くものである。Further, t2 is the maximum discharge temperature necessary for the warm air to reach a predetermined position, and t2 is changed depending on the magnitude of the air volume.
〈発明の効果〉
上述のように本発明の空気調和機は、暖房運転時には室
内温度又は室内熱交換器の温度若しくは冷媒圧力が上昇
するにつれて室内熱交換器の過冷却度か下がるように、
また、冷房運転時には室外熱交換器の温度若しくは冷媒
圧力が上昇するにつれて室外熱交換器の過冷却度がドが
るように制御手段で電気式膨脹弁の弁開度を調節するよ
うにしたことにより、暖房能力及び冷房能力を増大させ
暖房立上り特性及び冷房立上り特性を向上させることが
できる。<Effects of the Invention> As described above, in the air conditioner of the present invention, during heating operation, as the indoor temperature or the temperature or refrigerant pressure of the indoor heat exchanger increases, the degree of subcooling of the indoor heat exchanger decreases.
Further, during cooling operation, the valve opening degree of the electric expansion valve is adjusted by the control means so that the degree of subcooling of the outdoor heat exchanger decreases as the temperature or refrigerant pressure of the outdoor heat exchanger increases. As a result, heating capacity and cooling capacity can be increased, and heating start-up characteristics and cooling start-up characteristics can be improved.
図面は本発明の実施例を示すもので、第１図は冷暖用空
気調和機の冷媒回路図、第２図は冷房専用空気調和機の
冷媒回路図、第３図は過冷却制御の動作図、第４図は同
フローチャート、第５図は冷房、暖房運転のフローチャ
ートである。
１・・・圧縮機、２・・・冷暖流路切換弁、３・・・室
内熱交換器、４・・・電気式膨脹弁、５・・・キャピラ
リーチューブ、６・・・室外熱交換器、７・・・気液分
離器、８・・・制御手段、Ｔ＋ 、Ｔ２ 、Ｔｓ 、Ｔ
５・・・センサー。
第１図
第２図
第３図
室温又は凝縮温度（冷媒圧力）
第４ 図
第５図The drawings show an embodiment of the present invention, and Fig. 1 is a refrigerant circuit diagram of an air conditioner for cooling and heating, Fig. 2 is a refrigerant circuit diagram of an air conditioner exclusively for cooling, and Fig. 3 is an operation diagram of supercooling control. , FIG. 4 is a flowchart of the same, and FIG. 5 is a flowchart of cooling and heating operations. 1...Compressor, 2...Cooling/heating flow path switching valve, 3...Indoor heat exchanger, 4...Electric expansion valve, 5...Capillary tube, 6...Outdoor heat exchanger , 7... Gas-liquid separator, 8... Control means, T+, T2, Ts, T
5...Sensor. Figure 1 Figure 2 Figure 3 Room temperature or condensing temperature (refrigerant pressure) Figure 4 Figure 5
Claims (1)
脹弁と室外熱交換器とで冷凍サイクルを構成したヒート
ポンプ式空気調和機において、暖房運転時に室内温度又
は室内熱交換器の温度若しくは冷媒圧力が上昇するにつ
れて室内熱交換器の過冷却度が下がるように前記電気式
膨脹弁の弁開度を調整する制御手段を設けたことを特徴
とする空気調和機。 ２、圧縮機と室外熱交換器と電気式膨脹弁と室内熱交換
器とで冷凍サイクルを構成した空気調和機において、冷
房運転時に室外熱交換器の温度若しくは冷媒圧力が上昇
するにつれて室外熱交換器の過冷却度が下がるように前
記電気式膨脹弁の弁開度を調節する制御手段を設けたこ
とを特徴とする空気調和機。[Scope of Claims] 1. In a heat pump air conditioner in which a refrigeration cycle is configured by a compressor, a cooling/heating flow path switching valve, an indoor heat exchanger, an electric expansion valve, and an outdoor heat exchanger, the indoor temperature is adjusted during heating operation. Alternatively, an air conditioner comprising a control means for adjusting the valve opening of the electric expansion valve so that the degree of subcooling of the indoor heat exchanger decreases as the temperature or refrigerant pressure of the indoor heat exchanger increases. Machine. 2. In an air conditioner that has a refrigeration cycle composed of a compressor, an outdoor heat exchanger, an electric expansion valve, and an indoor heat exchanger, outdoor heat exchange occurs as the temperature or refrigerant pressure of the outdoor heat exchanger increases during cooling operation. An air conditioner comprising: a control means for adjusting the opening degree of the electric expansion valve so as to reduce the degree of supercooling of the air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63235428A JP2692894B2 (en) | 1988-09-20 | 1988-09-20 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63235428A JP2692894B2 (en) | 1988-09-20 | 1988-09-20 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0285647A true JPH0285647A (en) | 1990-03-27 |
| JP2692894B2 JP2692894B2 (en) | 1997-12-17 |
Family
ID=16985964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63235428A Expired - Fee Related JP2692894B2 (en) | 1988-09-20 | 1988-09-20 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2692894B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06137690A (en) * | 1992-10-26 | 1994-05-20 | Hitachi Ltd | Air conditioner |
| KR100413307B1 (en) * | 1995-12-29 | 2004-02-14 | 산요덴키가부시키가이샤 | Air Conditioner |
| JP2010048494A (en) * | 2008-08-22 | 2010-03-04 | Toshiba Carrier Corp | Air conditioner |
| JP2018077037A (en) * | 2016-10-25 | 2018-05-17 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Air conditioner |
| WO2020110213A1 (en) * | 2018-11-28 | 2020-06-04 | 三菱電機株式会社 | Air-conditioner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142358A (en) * | 1983-02-03 | 1984-08-15 | 株式会社デンソー | Refrigerator |
| JPS61145258U (en) * | 1985-02-28 | 1986-09-08 |
-
1988
- 1988-09-20 JP JP63235428A patent/JP2692894B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142358A (en) * | 1983-02-03 | 1984-08-15 | 株式会社デンソー | Refrigerator |
| JPS61145258U (en) * | 1985-02-28 | 1986-09-08 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06137690A (en) * | 1992-10-26 | 1994-05-20 | Hitachi Ltd | Air conditioner |
| KR100413307B1 (en) * | 1995-12-29 | 2004-02-14 | 산요덴키가부시키가이샤 | Air Conditioner |
| JP2010048494A (en) * | 2008-08-22 | 2010-03-04 | Toshiba Carrier Corp | Air conditioner |
| JP2018077037A (en) * | 2016-10-25 | 2018-05-17 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Air conditioner |
| WO2020110213A1 (en) * | 2018-11-28 | 2020-06-04 | 三菱電機株式会社 | Air-conditioner |
| JPWO2020110213A1 (en) * | 2018-11-28 | 2021-09-02 | 三菱電機株式会社 | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2692894B2 (en) | 1997-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |