JPH10115478A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH10115478A JPH10115478A JP8287391A JP28739196A JPH10115478A JP H10115478 A JPH10115478 A JP H10115478A JP 8287391 A JP8287391 A JP 8287391A JP 28739196 A JP28739196 A JP 28739196A JP H10115478 A JPH10115478 A JP H10115478A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- air conditioner
- leakage
- indoor unit
- leak
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気調和機に係り、
詳しくは、冷媒の漏洩を効果的かつ迅速に検出する技術
に関する。The present invention relates to an air conditioner,
More specifically, the present invention relates to a technology for effectively and quickly detecting leakage of a refrigerant.
【０００２】[0002]
【従来の技術】空気調和機では、施工時における冷媒配
管の接続不良や外力による配管フレア部の亀裂等に起因
して、室内空間に冷媒が漏洩することがある。通常、冷
媒としてはフロン等の人体に無害な物質が用いられる
が、冷媒が多量に流出した場合、空気調和性能の低下や
圧縮機の故障等が生じる。そこで、実公昭６０−３８８
５８号公報や特公平２−１４０５７３号公報等には、冷
媒の漏洩を冷媒漏洩センサにより検出し、警報器から警
報音を発生させたり、冷媒配管の管路に設けられた遮断
弁を閉鎖して冷媒の流出を止めるものが記載されてい
る。尚、冷媒は、その比重が空気より大きいことから、
漏洩時に室内の下部に溜まりやすい。そのため、上述し
た装置では、冷媒漏洩センサが壁面等の床面に近い部位
に設置されることが多い。2. Description of the Related Art In an air conditioner, refrigerant may leak into an indoor space due to poor connection of refrigerant piping during construction or cracks in a piping flare portion due to external force. Usually, a substance harmless to the human body such as chlorofluorocarbon is used as the refrigerant. However, if a large amount of the refrigerant flows out, the air conditioning performance will be reduced, and the compressor will fail. Therefore, the real public 60-388
In Japanese Patent Publication No. 58 and Japanese Patent Publication No. 2-140573, etc., refrigerant leakage is detected by a refrigerant leakage sensor, an alarm is generated from an alarm device, or a shut-off valve provided in a refrigerant pipe line is closed. A method for stopping the outflow of the refrigerant is described. Since the specific gravity of the refrigerant is greater than that of air,
When leaked, it tends to collect in the lower part of the room. Therefore, in the above-described apparatus, the refrigerant leakage sensor is often installed in a portion near a floor surface such as a wall surface.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上述した従
来の装置では、冷媒の漏洩が起こってもその検出に時間
が掛かり、多量の冷媒が流出することがあった。By the way, in the above-mentioned conventional apparatus, even if the leakage of the refrigerant occurs, it takes time to detect the leakage, and a large amount of the refrigerant may flow out.
【０００４】例えば、オフィスや店舗等には、室温の均
一化や省スペースを図るべく、天井埋込型の空気調和機
が多く用いられているが、この種の空気調和機では、室
内ユニットと冷媒漏洩センサとの間の距離が当然に大き
くなると共に、流出した冷媒が天井裏に溜まりやすい。
したがって、室内ユニットの配管接続部等から冷媒の漏
洩が起こっても、室内空間の形状や大きさ等によっては
冷媒漏洩センサに冷媒が到達し難く、漏洩検出が大幅に
遅れることになる。特に、多数の室内ユニットを備えた
パッケージエアコン等では、冷媒回路内に大量の冷媒が
封入されているため、漏洩検出の遅れによって多量の冷
媒が流出することになる。[0004] For example, in offices and stores, air conditioners of a ceiling-mounted type are often used in order to make room temperature uniform and save space. In this type of air conditioner, an indoor unit and an indoor unit are used. The distance from the refrigerant leak sensor naturally increases, and the refrigerant that has flowed out easily accumulates in the space above the ceiling.
Therefore, even if the refrigerant leaks from the pipe connection part of the indoor unit or the like, the refrigerant hardly reaches the refrigerant leak sensor depending on the shape and size of the indoor space, and the leak detection is greatly delayed. In particular, in a packaged air conditioner or the like provided with a large number of indoor units, a large amount of refrigerant is sealed in the refrigerant circuit, so that a large amount of refrigerant flows out due to a delay in leak detection.
【０００５】一方、空気調和機の冷媒としては、近年、
オゾン層の破壊を抑制するべく、Ｒ１２やＲ２２に対す
る代替冷媒が提案されている。これら代替フロンとして
は、塩素原子を含まないＨＦＣ系フロン（Ｒ３２やＲ１
２５、Ｒ１３４ａ）を種々の混合比で混合した混合冷媒
が主であり、その他にアンモニアやプロパン等の炭化水
素や二酸化炭素等も候補として挙げられている。ところ
が、従来の冷媒漏洩センサでは、単一の冷媒に反応する
ものが殆どであり、冷媒の種類が異なった場合には漏洩
検出が行えない。そのため、冷媒の種類に対応する多種
の冷媒漏洩センサを設定する必要があると共に、何らか
の理由で空気調和機の使用冷媒を変更した場合、冷媒漏
洩センサの交換も必要となる。On the other hand, as a refrigerant for an air conditioner,
In order to suppress the destruction of the ozone layer, alternative refrigerants for R12 and R22 have been proposed. As these alternative CFCs, HFC-based CFCs containing no chlorine atom (R32 and R1
25, R134a) at various mixing ratios, and hydrocarbons such as ammonia and propane, carbon dioxide and the like are also listed as candidates. However, most of the conventional refrigerant leak sensors react to a single refrigerant, and leak detection cannot be performed if the type of the refrigerant is different. Therefore, it is necessary to set various types of refrigerant leakage sensors corresponding to the types of refrigerant, and when the refrigerant used in the air conditioner is changed for some reason, it is necessary to replace the refrigerant leakage sensor.
【０００６】本発明は、上記状況に鑑みなされたもの
で、冷媒の漏洩検出を迅速かつ確実に行えるようにした
空気調和機を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an air conditioner capable of quickly and reliably detecting leakage of a refrigerant.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に、請求項１の発明では、室内熱交換器や送風ファン等
を収納した室内ユニットを有する空気調和機において、
前記室内ユニットに冷媒の漏洩を検出する冷媒漏洩検出
手段を設けたものを提案する。In order to solve the above-mentioned problems, according to the present invention, there is provided an air conditioner having an indoor unit containing an indoor heat exchanger, a blower fan, and the like.
It is proposed that the indoor unit is provided with a refrigerant leakage detecting means for detecting refrigerant leakage.
【０００８】この発明によれば、室内ユニットの取付位
置に拘わらず、漏洩した冷媒が冷媒漏洩検出手段により
検出されやすくなる。According to the present invention, the leaked refrigerant is easily detected by the refrigerant leak detecting means regardless of the position where the indoor unit is mounted.
【０００９】また、請求項２の発明では、室内熱交換器
や送風ファン等を収納した室内ユニットを有する空気調
和機において、前記室内ユニットの冷媒配管接続部の近
傍に冷媒の漏洩を検出する冷媒漏洩検出手段を設けたも
のを提案する。According to a second aspect of the present invention, in an air conditioner having an indoor unit accommodating an indoor heat exchanger, a blower fan, and the like, a refrigerant for detecting leakage of refrigerant near a refrigerant pipe connection portion of the indoor unit. A device provided with leak detection means is proposed.
【００１０】この発明によれば、室内ユニットにおいて
冷媒配管の接続部から冷媒が漏洩した場合、漏洩した冷
媒が冷媒漏洩検出手段により迅速に検出される。According to the present invention, when the refrigerant leaks from the connection portion of the refrigerant pipe in the indoor unit, the leaked refrigerant is quickly detected by the refrigerant leak detecting means.
【００１１】また、請求項３の発明では、室内熱交換器
や送風ファン等を収納した室内ユニットを有する空気調
和機において、前記室内ユニットに接続される冷媒配管
の近傍に冷媒の漏洩を検出する冷媒漏洩検出手段を設け
たものを提案する。[0011] In the air conditioner having an indoor unit accommodating an indoor heat exchanger, a blower fan and the like, the present invention detects leakage of refrigerant near a refrigerant pipe connected to the indoor unit. A device provided with a refrigerant leak detecting means is proposed.
【００１２】この発明によれば、室内ユニットの近傍等
において冷媒配管に生じた亀裂等から冷媒が漏洩した場
合、漏洩した冷媒が冷媒漏洩検出手段により迅速に検出
される。According to the present invention, when the refrigerant leaks from a crack or the like generated in the refrigerant pipe near the indoor unit or the like, the leaked refrigerant is quickly detected by the refrigerant leak detecting means.
【００１３】また、請求項４の発明では、請求項１〜３
記載の空気調和機において、前記冷媒漏洩検出手段が酸
素濃度センサであるものを提案する。Further, in the invention of claim 4, claims 1 to 3 are provided.
In the air conditioner described above, it is proposed that the refrigerant leak detection means is an oxygen concentration sensor.
【００１４】この発明によれば、冷媒の漏洩に伴って酸
素濃度が低下するため、使用冷媒の種類に拘わらず、冷
媒の漏洩検出が可能となる。According to the present invention, since the oxygen concentration decreases with the leakage of the refrigerant, the leakage of the refrigerant can be detected regardless of the type of the refrigerant used.
【００１５】[0015]
【発明の実施の形態】以下、本発明に係る空気調和機の
一実施形態を図面に基づき詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an air conditioner according to the present invention will be described in detail with reference to the drawings.
【００１６】図１は、本実施形態における室内ユニット
の取付状態を示す部分断面側面図であり、図２は室内ユ
ニットの内部構造を示した横断面図である。これらの図
に示したように、室内ユニット１は、天井空間に配設さ
れる天井埋込型であり、建屋天井面３に吊ボルト５を介
して吊り下げ・固定されるユニット本体７と、ユニット
本体７に取り付けられて天井板９に密着する化粧パネル
１５とからなっている。FIG. 1 is a partial cross-sectional side view showing an attached state of an indoor unit in this embodiment, and FIG. 2 is a transverse cross-sectional view showing an internal structure of the indoor unit. As shown in these figures, the indoor unit 1 is a ceiling embedded type disposed in a ceiling space, and a unit main body 7 suspended and fixed to a building ceiling surface 3 via suspension bolts 5, The decorative panel 15 is attached to the unit body 7 and is in close contact with the ceiling plate 9.
【００１７】ユニット本体９は、鋼板製の筐体であるボ
ディ２１、ボディ２１の内側に配置された略正方形に折
り曲げられた室内熱交換器２３、室内熱交換器２３の内
側に位置して電動モータ２５により駆動される送風ファ
ン２７等からなっている。室内熱交換器２３には一対の
冷媒接続管３１，３３が形成されており、これら冷媒接
続管３１，３３に図示しない室外ユニットからの冷媒配
管３５，３７が接続している。The unit body 9 includes a body 21 which is a housing made of a steel plate, an indoor heat exchanger 23 which is disposed inside the body 21 and is bent into a substantially square shape, and which is located inside the indoor heat exchanger 23 and is electrically driven. It comprises a blower fan 27 driven by a motor 25 and the like. The indoor heat exchanger 23 is formed with a pair of refrigerant connection pipes 31 and 33, and refrigerant pipes 35 and 37 from an outdoor unit (not shown) are connected to the refrigerant connection pipes 31 and 33.
【００１８】ボディ２１の側面には、冷媒接続管３１，
３３と冷媒配管３５，３７との接続部位近傍に、冷媒漏
洩センサ４１が設置されている。冷媒漏洩センサ４１
は、酸素濃度が所定の値（本実施形態では、１８％）以
下となったことを検出し、図示しない室内ユニット１の
コントローラに漏洩検出信号を出力する。On the side surface of the body 21, refrigerant connection tubes 31,
A refrigerant leak sensor 41 is provided near the connection between the refrigerant pipe 33 and the refrigerant pipes 35 and 37. Refrigerant leak sensor 41
Detects that the oxygen concentration has become equal to or lower than a predetermined value (18% in this embodiment), and outputs a leak detection signal to a controller of the indoor unit 1 (not shown).
【００１９】以下、本実施形態の作用を述べる。Hereinafter, the operation of the present embodiment will be described.
【００２０】施工時における冷媒配管３５，３７の接続
不良があったり、外力による配管フレア部の亀裂が生じ
た場合、冷媒接続管３１，３３と冷媒配管３５，３７と
の接続部位から冷媒が漏洩する。すると、漏洩部位近傍
の空気中に冷媒が拡散することにより該部の酸素濃度が
相対的に低下し、これが冷媒漏洩センサ４１により直ち
に検出されて、コントローラに漏洩検出信号が出力され
る。If the refrigerant pipes 35, 37 are improperly connected at the time of construction, or if the pipe flare is cracked by an external force, the refrigerant leaks from the connection portion between the refrigerant connection pipes 31, 33 and the refrigerant pipes 35, 37. I do. Then, the refrigerant diffuses into the air in the vicinity of the leak site, whereby the oxygen concentration in the portion relatively decreases. This is immediately detected by the refrigerant leak sensor 41, and a leak detection signal is output to the controller.
【００２１】漏洩検出信号が入力すると、コントローラ
は、警報装置を介して警報音を吹鳴させてユーザに冷媒
の漏洩を知らしめると共に、空気調和機の運転を中止さ
せる。これにより、多量の冷媒が流出する前に冷媒回路
の遮断等を行うことが可能となり、空気調和性能の低下
や圧縮機の故障等が防止できるようになる。尚、冷媒配
管３５，３７に電磁式遮断弁等を設けておけば、冷媒の
漏洩が検出された時点で、直ちに冷媒の流出を止めるこ
とができる。When the leak detection signal is input, the controller emits an alarm sound through an alarm device to notify the user of the leakage of the refrigerant and stop the operation of the air conditioner. This makes it possible to shut off the refrigerant circuit or the like before a large amount of refrigerant flows out, thereby preventing a decrease in air conditioning performance, a failure of the compressor, and the like. If an electromagnetic shutoff valve or the like is provided in the refrigerant pipes 35 and 37, the outflow of the refrigerant can be stopped immediately when leakage of the refrigerant is detected.
【００２２】このように、本実施形態では、室内ユニッ
ト１における冷媒配管の接続部位近傍に酸素濃度検出型
の冷媒漏洩センサを設けたため、接続部位からの冷媒の
漏洩を迅速に検出することが可能になると共に、冷媒の
種類に拘わらず漏洩検出が行えるようになった。As described above, in the present embodiment, since the refrigerant leak sensor of the oxygen concentration detection type is provided near the connection portion of the refrigerant pipe in the indoor unit 1, it is possible to quickly detect the leakage of the refrigerant from the connection portion. And leak detection can be performed regardless of the type of refrigerant.
【００２３】以上で具体的実施形態の説明を終えるが、
本発明は上述した実施形態に限定されるものではない。
例えば、上記実施形態では本発明を天井埋込型の室内ユ
ニットを有する空気調和機に適用したが、天井吊型や床
置型等の室内ユニットを有する空気調和機に適用しても
よい。また、冷媒漏洩センサは、冷媒配管の近傍や室内
ユニット本体内等、室内ユニットのボディ側面以外の部
位に取り付けるようにしてもよい。The description of the specific embodiment has been completed.
The present invention is not limited to the embodiments described above.
For example, in the above embodiment, the present invention is applied to an air conditioner having an indoor unit of a ceiling embedded type, but may be applied to an air conditioner having an indoor unit of a ceiling suspension type, a floor type, or the like. Further, the refrigerant leakage sensor may be attached to a portion other than the body side surface of the indoor unit, such as near the refrigerant pipe or in the indoor unit main body.
【００２４】[0024]
【発明の効果】以上説明したように、本発明によれば、
室内熱交換器や送風ファン等を収納した室内ユニットを
有する空気調和機において、室内ユニットや冷媒配管に
冷媒の漏洩を検出する冷媒漏洩検出手段を設けるように
したため、室内ユニットの取付位置に拘わらず、冷媒の
漏洩が冷媒漏洩検出手段により迅速に検出され、多量の
冷媒が流出すること等が防止される。また、冷媒漏洩検
出手段を酸素濃度センサとしたものでは、冷媒の種類に
拘わらず漏洩の検出が可能となるため、冷媒の種類に対
応する多種の冷媒漏洩センサを設定する必要がなくな
る。As described above, according to the present invention,
In an air conditioner having an indoor unit accommodating an indoor heat exchanger, a blower fan, and the like, the indoor unit and the refrigerant pipe are provided with a refrigerant leak detection unit that detects leakage of the refrigerant, regardless of the mounting position of the indoor unit. In addition, the leakage of the refrigerant is quickly detected by the refrigerant leakage detection means, and a large amount of refrigerant is prevented from flowing out. Further, when the refrigerant leak detecting means is an oxygen concentration sensor, it is possible to detect the leak irrespective of the type of the refrigerant, so that it is not necessary to set various kinds of refrigerant leak sensors corresponding to the type of the refrigerant.
【図１】本発明に係る室内ユニットの取付状態を示した
部分断面側面図である。FIG. 1 is a partial sectional side view showing an attached state of an indoor unit according to the present invention.
【図２】同室内ユニットの内部構造を示した横断面図で
ある。FIG. 2 is a cross-sectional view showing the internal structure of the indoor unit.
１ 室内ユニット ２１ ボディ ３１，３３ 冷媒接続管 ３５，３７ 冷媒配管 ４１ 冷媒漏洩センサ DESCRIPTION OF SYMBOLS 1 Indoor unit 21 Body 31, 33 Refrigerant connection pipe 35, 37 Refrigerant pipe 41 Refrigerant leak sensor
Claims (4)
室内ユニットを有する空気調和機において、 前記室内ユニットに冷媒の漏洩を検出する冷媒漏洩検出
手段を設けたことを特徴とする空気調和機。1. An air conditioner having an indoor unit containing an indoor heat exchanger, a blower fan and the like, wherein the indoor unit is provided with a refrigerant leak detecting means for detecting a refrigerant leak. .
室内ユニットを有する空気調和機において、 前記室内ユニットの冷媒配管接続部の近傍に冷媒の漏洩
を検出する冷媒漏洩検出手段を設けたことを特徴とする
空気調和機。2. An air conditioner having an indoor unit accommodating an indoor heat exchanger, a blower fan and the like, wherein refrigerant leak detection means for detecting leakage of refrigerant is provided near a refrigerant pipe connection portion of the indoor unit. An air conditioner characterized by the following.
室内ユニットを有する空気調和機において、 前記室内ユニットに接続される冷媒配管の近傍に冷媒の
漏洩を検出する冷媒漏洩検出手段を設けたことを特徴と
する空気調和機。3. An air conditioner having an indoor unit accommodating an indoor heat exchanger, a blower fan, and the like, wherein refrigerant leak detection means for detecting leakage of refrigerant is provided near a refrigerant pipe connected to the indoor unit. An air conditioner characterized by that:
であることを特徴とする、請求項１〜３記載の空気調和
機。4. The air conditioner according to claim 1, wherein said refrigerant leakage detecting means is an oxygen concentration sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8287391A JPH10115478A (en) | 1996-10-09 | 1996-10-09 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8287391A JPH10115478A (en) | 1996-10-09 | 1996-10-09 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10115478A true JPH10115478A (en) | 1998-05-06 |
Family
ID=17716747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8287391A Pending JPH10115478A (en) | 1996-10-09 | 1996-10-09 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10115478A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1083392A2 (en) * | 1999-09-07 | 2001-03-14 | Matsushita Electric Industrial Co., Ltd. | Ventilation system |
| JP2002098346A (en) * | 2000-09-26 | 2002-04-05 | Daikin Ind Ltd | Indoor machine for air conditioner |
| JP2011202831A (en) * | 2010-03-25 | 2011-10-13 | Hitachi Appliances Inc | Remote controller, indoor unit and air conditioner |
| WO2012160598A1 (en) * | 2011-05-23 | 2012-11-29 | 三菱電機株式会社 | Air conditioner |
| US20130278121A1 (en) * | 2012-04-24 | 2013-10-24 | Fujitsu Limited | Rack device, rack system, and housing structure |
| JP2014081160A (en) * | 2012-10-17 | 2014-05-08 | Hitachi Appliances Inc | Air conditioner |
| JP2015230136A (en) * | 2014-06-05 | 2015-12-21 | 日立アプライアンス株式会社 | Air conditioner |
| JP2016188758A (en) * | 2014-11-18 | 2016-11-04 | 三菱電機株式会社 | Air conditioner and cooling medium quantity setting method for the same |
| JP2016223650A (en) * | 2015-05-28 | 2016-12-28 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド | Air conditioner and display control method for air conditioner |
| EP3214386A4 (en) * | 2014-10-31 | 2018-07-25 | Daikin Industries, Ltd. | Air-conditioner indoor unit |
| EP3264000A4 (en) * | 2015-03-26 | 2018-11-07 | Mitsubishi Electric Corporation | Indoor unit for air conditioner |
| CN110173814A (en) * | 2019-05-31 | 2019-08-27 | 广东美的制冷设备有限公司 | Air conditioner and the secondary refrigerant leakage detection method of air conditioner, device |
| CN110173815A (en) * | 2019-05-31 | 2019-08-27 | 广东美的制冷设备有限公司 | The control method of air conditioner and air conditioner, device |
| JP2020134033A (en) * | 2019-02-20 | 2020-08-31 | パナソニックＩｐマネジメント株式会社 | Indoor unit |
-
1996
- 1996-10-09 JP JP8287391A patent/JPH10115478A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1083392A2 (en) * | 1999-09-07 | 2001-03-14 | Matsushita Electric Industrial Co., Ltd. | Ventilation system |
| EP1083392A3 (en) * | 1999-09-07 | 2002-10-02 | Matsushita Electric Industrial Co., Ltd. | Ventilation system |
| JP2002098346A (en) * | 2000-09-26 | 2002-04-05 | Daikin Ind Ltd | Indoor machine for air conditioner |
| JP2011202831A (en) * | 2010-03-25 | 2011-10-13 | Hitachi Appliances Inc | Remote controller, indoor unit and air conditioner |
| WO2012160598A1 (en) * | 2011-05-23 | 2012-11-29 | 三菱電機株式会社 | Air conditioner |
| US9933205B2 (en) | 2011-05-23 | 2018-04-03 | Mitsubishi Electric Corporation | Air-conditioning apparatus |
| GB2504036A (en) * | 2011-05-23 | 2014-01-15 | Mitsubishi Electric Corp | Air conditioner |
| GB2504036B (en) * | 2011-05-23 | 2018-02-21 | Mitsubishi Electric Corp | Air-conditioning apparatus |
| US9500388B2 (en) * | 2012-04-24 | 2016-11-22 | Fujitsu Limited | Rack device, rack system, and housing structure |
| US20130278121A1 (en) * | 2012-04-24 | 2013-10-24 | Fujitsu Limited | Rack device, rack system, and housing structure |
| US9664410B2 (en) | 2012-04-24 | 2017-05-30 | Fujitsu Limited | Rack device, rack system, and housing structure |
| JP2014081160A (en) * | 2012-10-17 | 2014-05-08 | Hitachi Appliances Inc | Air conditioner |
| JP2015230136A (en) * | 2014-06-05 | 2015-12-21 | 日立アプライアンス株式会社 | Air conditioner |
| EP3214386A4 (en) * | 2014-10-31 | 2018-07-25 | Daikin Industries, Ltd. | Air-conditioner indoor unit |
| US10753631B2 (en) | 2014-10-31 | 2020-08-25 | Daikin Industries, Ltd. | Air-conditioner indoor unit |
| JP2016188758A (en) * | 2014-11-18 | 2016-11-04 | 三菱電機株式会社 | Air conditioner and cooling medium quantity setting method for the same |
| JP2019039666A (en) * | 2014-11-18 | 2019-03-14 | 三菱電機株式会社 | Air conditioner |
| US11262097B2 (en) | 2014-11-18 | 2022-03-01 | Mitsubishi Electric Corporation | Method for setting the refrigerant charge amount in an air-conditioning apparatus |
| EP3264000A4 (en) * | 2015-03-26 | 2018-11-07 | Mitsubishi Electric Corporation | Indoor unit for air conditioner |
| JP2016223650A (en) * | 2015-05-28 | 2016-12-28 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド | Air conditioner and display control method for air conditioner |
| JP2020134033A (en) * | 2019-02-20 | 2020-08-31 | パナソニックＩｐマネジメント株式会社 | Indoor unit |
| CN110173814A (en) * | 2019-05-31 | 2019-08-27 | 广东美的制冷设备有限公司 | Air conditioner and the secondary refrigerant leakage detection method of air conditioner, device |
| CN110173815A (en) * | 2019-05-31 | 2019-08-27 | 广东美的制冷设备有限公司 | The control method of air conditioner and air conditioner, device |
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