JPH10115478A - Air conditioner - Google Patents

Air conditioner

Info

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
refrigerant leakage
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
Application number
JP8287391A
Other languages
Japanese (ja)
Inventor
Takao Shiina
Yasuo Tajima
孝夫 椎名
保男 田島
Original Assignee
Sanyo Electric Co Ltd
三洋電機株式会社
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 Sanyo Electric Co Ltd, 三洋電機株式会社 filed Critical Sanyo Electric Co Ltd
Priority to JP8287391A priority Critical patent/JPH10115478A/en
Publication of JPH10115478A publication Critical patent/JPH10115478A/en
Application status is Granted legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32Responding to malfunctions or emergencies
    • F24F11/36Responding to malfunctions or emergencies to leakage of heat-exchange fluid

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which enables detecting leakage of refrigerant quickly and surely. SOLUTION: On a side of a body 21 a refrigerant leakage sensor 41 is placed close to the part of connection between refrigerant-connecting pipes 31, 33 and refrigerant piping 35, 37. The refrigerant leakage sensor 41 detects a fall of oxygen concentration below a specific value and thereupon outputs a leakage detection signal to a controller of an indoor unit 1. The input of the leakage detection signal makes the controller blow an alarm in an alarming device, thus while issuing a warning on the leakage of refrigerant to the user on the one hand, the operation of the air conditioner is stopped.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は空気調和機に係り、 The present invention relates to relates to an air conditioner,
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。 More particularly, to effectively and rapidly detect a technique for refrigerant leakage.

【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。 BACKGROUND OF THE INVENTION air conditioner, due to the cracks in the pipe flare by poor connection or an external force of a refrigerant pipe at the time of construction, there may be a refrigerant to the indoor space leaks. 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。 Usually harmless materials are used in the human body, such as Freon as a refrigerant, when the refrigerant has a large amount of outflow, failure or the like and a decrease in the compressor of the air conditioner performance is caused. そこで、実公昭60−388 Therefore, Japanese Utility Model 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。 The 58 and JP fair 2-140573 Patent Publication, the refrigerant leakage is detected by refrigerant leakage sensor, closed or generating an alarm sound from the alarm device, the shut-off valve provided in the conduit of the refrigerant pipe which stops the flow of refrigerant Te is described. 尚、冷媒は、その比重が空気より大きいことから、 It is to be noted that the refrigerant, since its specific gravity is greater than air,
漏洩時に室内の下部に溜まりやすい。 Easy to accumulate in the lower part of the room at the time of leakage. 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。 Therefore, in the apparatus described above, it is often refrigerant leakage sensor is installed at a site close to the floor surface such as a wall.

【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。 [SUMMARY OF THE INVENTION Incidentally, in the conventional device described above, it takes time to the detection take place is refrigerant leakage, there is a large amount of refrigerant flows 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。 [0004] For example, in the office or store or the like, in order made uniform and space of room temperature, but a ceiling-embedded air conditioner is widely used, in this type of air conditioner, an indoor unit with the distance between the refrigerant leakage sensor becomes naturally large, leaked refrigerant tends accumulate on the ceiling.
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。 Therefore, even if it occurs piping leakage of the refrigerant from the connection portion or the like of the indoor unit, depending on the shape and size of the indoor space hardly reach the refrigerant to the refrigerant leakage sensor, the leak detection will be delayed considerably. 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。 In particular, the package in the air conditioner with multiple indoor units, because it is enclosed a large amount of refrigerant in the refrigerant circuit, so that a large amount of refrigerant flows out due to a delay of leak detection.

【0005】一方、空気調和機の冷媒としては、近年、 On the other hand, as the refrigerant of the air conditioner, in recent years,
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。 In order to suppress the destruction of the ozone layer, alternative refrigerant have been proposed for R12 and R22. 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 These substitute fluorocarbons, HFC-based fluorocarbons (R32 containing no chlorine atom and 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。 25, R134a) and is the main mixed refrigerant mixed in various mixing ratios, hydrocarbons and carbon dioxide such as other ammonia and propane are also cited as candidates. 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。 However, in the conventional refrigerant leakage sensor, are mostly those which react to a single refrigerant, when the type of the refrigerant is different can not perform leak detection. 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。 Therefore, the need to set the refrigerant leakage sensor wide corresponding to the type of refrigerant, if you change the refrigerant used in the air conditioner for some reason, the exchange of refrigerant leakage sensor is also required.

【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。 [0006] The present invention has been made in view of the above circumstances, it is to provide an air conditioner so as to leak detection of refrigerant performed quickly and reliably.

【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、 In order to solve the above problems SUMMARY OF THE INVENTION In the invention of claim 1, in an air conditioner including an indoor unit which houses an indoor heat exchanger and the blower fan and the like,
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。 We suggest that provided refrigerant leakage detecting means for detecting a refrigerant leak in the indoor unit.

【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 this invention, regardless of the mounting position of the indoor unit, the refrigerant leak is easily detected by the refrigerant leakage detecting means.

【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。 [0009] The refrigerant in the invention of claim 2, to detect the in the air conditioner including an indoor unit which houses an indoor heat exchanger and a blower fan or the like, refrigerant pipe connecting portion near the refrigerant leakage in the said indoor unit It suggests that provided the leakage detection means.

【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 from the connecting portion of the refrigerant pipe in the indoor unit is leaked, the refrigerant leakage is promptly detected by the refrigerant leakage 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 invention of claim 3, in the air conditioner including an indoor unit which houses an indoor heat exchanger and the blower fan or the like, for detecting the refrigerant leakage in the vicinity of the refrigerant pipes connected to the indoor unit Suggest that provided refrigerant leakage detecting means.

【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 this invention, when the refrigerant from cracks generated in the refrigerant pipe near the indoor unit or the like is leaked, the refrigerant leakage is promptly detected by the refrigerant leakage detecting means.

【0013】また、請求項4の発明では、請求項1〜3 [0013] In the invention of claim 4, claims 1 to 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。 The air conditioner according proposes what the refrigerant leakage detecting 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, to lower the oxygen concentration with the leakage of the refrigerant, irrespective of the type of refrigerant used, it is possible to leak detection of the refrigerant.

【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。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of an air conditioner according to the present invention in detail with reference to the accompanying 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。 [0016] Figure 1 is a partial cross-sectional side view showing a mounting state of the indoor unit in the present embodiment, FIG. 2 is a cross-sectional view showing the internal structure of the indoor unit. 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。 As shown in these drawings, the indoor unit 1 is a ceiling embedded type disposed in the ceiling space, a unit body 7 which is & fixed suspended via a bolt 5 suspended on the building ceiling surface 3, is attached to the unit body 7 has a decorative panel 15 for 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。 The unit main body 9, the body 21 is a steel casing, the indoor heat exchanger 23 is bent substantially square, which is located inside the body 21, located inside the indoor heat exchanger 23 Electric It consists blower fan 27 and the like driven by a motor 25. 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 indoor heat exchanger 23 has a pair of coolant connecting tube 31 and 33 is formed, refrigerant pipes 35, 37 from the outdoor unit (not shown) to these refrigerant connection pipes 31 and 33 are connected.

【0018】ボディ21の側面には、冷媒接続管31, [0018] The side surface of the body 21, the refrigerant connection pipe 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。 The connecting portion near the 33 and the refrigerant pipes 35 and 37, refrigerant leakage sensor 41 is installed. 冷媒漏洩センサ41 Refrigerant leakage sensor 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。 The oxygen concentration (in the present embodiment, 18%) a predetermined value to detect that it is now less, and outputs the leakage detection signal to the controller of the indoor unit 1, not shown.

【0019】以下、本実施形態の作用を述べる。 [0019] Hereinafter, describing the operation of the present embodiment.

【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。 [0020] or a connection failure of the refrigerant pipe 35, 37 at the time of construction, if the cracks of the pipe flare portion by an external force occurs, refrigerant leakage from the connection site between the refrigerant connection pipe 31 and 33 and the refrigerant pipe 35, 37 to. 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。 Then, the oxygen concentration of the moiety by diffusing refrigerant in the air leakage site near relatively lowered, which is immediately detected by the refrigerant leakage sensor 41, the leakage 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。 [0021] leak detection signal is input, the controller, with notify the refrigerant leakage to the user by blowing an alarm sound through the warning device, to stop the operation of the air conditioner. 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。 Thus, it is possible to perform shutdown or similar refrigerant circuit before the large amount of refrigerant flows out, failure of the reduction and the compressor of the air conditioner performance can be able to prevent. 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。 Incidentally, if provided an electromagnetic shut-off valve or the like to the refrigerant pipe 35, 37, when the leakage of refrigerant is detected, it can immediately stop the outflow of refrigerant.

【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。 [0022] Thus, in the present embodiment, due to the provision of the refrigerant leakage sensor of the oxygen concentration detection type connection sites near the refrigerant pipe in the indoor unit 1, it can be quickly detect leakage of the refrigerant from the connecting portion together becomes was able to perform a leakage detection 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、 [0023] Although the end of the description of specific embodiments above,
本発明は上述した実施形態に限定されるものではない。 The present invention is not limited to the embodiments described above.
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。 For example, in the above embodiment, the present invention is applied to an air conditioner having a ceiling of the indoor unit may be applied to an air conditioner including an indoor unit such as a ceiling suspension type and floor-type. 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 refrigerant leakage sensor or the like near and indoor unit body of the refrigerant pipes may be attached to the portion other than the body side of the indoor unit.

【0024】 [0024]

【発明の効果】以上説明したように、本発明によれば、 As described in the foregoing, according to the present invention,
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。 In an air conditioner including an indoor unit which houses an indoor heat exchanger and the blower fan or the like, because you provided a refrigerant leakage detecting means for detecting the refrigerant leakage in the indoor unit and the refrigerant pipe, regardless of the mounting position of the indoor unit , leakage of the refrigerant is quickly detected by the refrigerant leakage detecting means, that such a large amount of refrigerant flows out is prevented. 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。 Moreover, that where the refrigerant leakage detecting means and an oxygen concentration sensor, since it is possible to detect leaks regardless of the type of refrigerant, it is not necessary to set the refrigerant leakage sensor wide corresponding to the type of refrigerant.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【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。 1 is a partial cross-sectional side view showing the mounted state of the 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。 2 is a cross-sectional view showing the internal structure of the indoor unit.

【符号の説明】 DESCRIPTION OF SYMBOLS

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 1 indoor unit 21 body 31, 33 the refrigerant connection pipe 35, 37 a refrigerant pipe 41 refrigerant leakage sensor

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 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ことを特徴とする空気調和機。 1. A air conditioner including an indoor unit which houses an indoor heat exchanger and a blower fan or the like, an air conditioner which is characterized in that a refrigerant leakage detecting means for detecting a refrigerant leak in the indoor unit .
  2. 【請求項2】 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ことを特徴とする空気調和機。 2. A air conditioner including an indoor unit which houses an indoor heat exchanger and the blower fan or the like, providing the refrigerant leakage detecting means for detecting a refrigerant leak in the vicinity of the refrigerant pipe connecting portion of the indoor unit air conditioner according to claim.
  3. 【請求項3】 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ことを特徴とする空気調和機。 3. A air conditioner including an indoor unit which houses an indoor heat exchanger and a blower fan or the like, provided with the refrigerant leakage detecting means for detecting a refrigerant leak in the vicinity of the refrigerant pipes connected to the indoor unit air conditioner, characterized in that.
  4. 【請求項4】 前記冷媒漏洩検出手段が酸素濃度センサ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. characterized in that the refrigerant leakage detecting means is an oxygen concentration sensor, the air conditioner of claim 1, wherein.
JP8287391A 1996-10-09 1996-10-09 Air conditioner Granted JPH10115478A (en)

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

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP8287391A Granted JPH10115478A (en) 1996-10-09 1996-10-09 Air conditioner

Country Status (1)

Country Link
JP (1) JPH10115478A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1083392A2 (en) * 1999-09-07 2001-03-14 Matsushita Electric Industrial Co., Ltd. Ventilation system
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
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

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1083392A3 (en) * 1999-09-07 2002-10-02 Matsushita Electric Industrial Co., Ltd. Ventilation system
EP1083392A2 (en) * 1999-09-07 2001-03-14 Matsushita Electric Industrial Co., Ltd. Ventilation system
JP2011202831A (en) * 2010-03-25 2011-10-13 Hitachi Appliances Inc Remote controller, indoor unit and air conditioner
GB2504036B (en) * 2011-05-23 2018-02-21 Mitsubishi Electric Corp Air-conditioning apparatus
WO2012160598A1 (en) * 2011-05-23 2012-11-29 三菱電機株式会社 Air conditioner
GB2504036A (en) * 2011-05-23 2014-01-15 Mitsubishi Electric Corp Air conditioner
US9933205B2 (en) 2011-05-23 2018-04-03 Mitsubishi Electric Corporation Air-conditioning apparatus
US20130278121A1 (en) * 2012-04-24 2013-10-24 Fujitsu Limited Rack device, rack system, and housing structure
US9500388B2 (en) * 2012-04-24 2016-11-22 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
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
EP3264000A4 (en) * 2015-03-26 2018-11-07 Mitsubishi Electric Corporation Indoor unit for air conditioner

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