JPH02140574A - Air conditioning apparatus - Google Patents

Air conditioning apparatus

Info

Publication number
JPH02140574A
JPH02140574A JP63292899A JP29289988A JPH02140574A JP H02140574 A JPH02140574 A JP H02140574A JP 63292899 A JP63292899 A JP 63292899A JP 29289988 A JP29289988 A JP 29289988A JP H02140574 A JPH02140574 A JP H02140574A
Authority
JP
Japan
Prior art keywords
refrigerant
valve
heat exchanger
unit
room
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
JP63292899A
Other languages
Japanese (ja)
Inventor
Kunimori Sekigami
邦衛 関上
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP63292899A priority Critical patent/JPH02140574A/en
Publication of JPH02140574A publication Critical patent/JPH02140574A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/221—Preventing leaks from developing

Landscapes

  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE:To reduce the leakage of refrigerant leaking from a leak point in a room unit into a residential room to a considerable small amount so as to avoid a changer to human life by a method wherein the refrigerant leakage from a room unit during cooling or heating operation is detected, and pump down operation is carried out to recover the refrigerant in the room unit to an outdoor unit. CONSTITUTION:When the refrigerant leaks from a refrigerant pipe joint of a room heat exchanger 7 or a refrigerant pressure reducing device 8 in a room unit 6, and flows into a room where the room unit 6 is installed, the leakage is detected by a refrigerant leakage detector 15, and an alarm 16 is put into action to notice the leakage. A controller 17 receives the signal from the detector 15 and issues a signal to shut a second valve 14 in case of cooling operation. In case of heating operation, a four-way valve 3 is switched as shown by dotted lines, and the second valve 14 is closed so that the refrigerant is connection pipes 9 and 12 between the room unit 6 and an outdoor unit 1 and pipes in the room unit 6 is recovered to the outdoor unit 1 and stored in an outdoor heat exchanger 4 and a liquid receiver 5, i.e. pump down operation takes place. Consequently, the leakage of refrigerant into a residential room is considerably small so that it may not cause a danger to human life.

Description

【発明の詳細な説明】 （イ）産業上の利用分野 本発明は室外ユニットと室内ユニットとを配管接続した
分離型の空気調和装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a separate air conditioner in which an outdoor unit and an indoor unit are connected by piping.

（ロ）従来の技術 空気調和機の冷媒管から冷媒ガスが漏れると人命に危険
を及ぼすため、冷媒漏れを検出して圧縮機の運転を停止
させると共に冷媒ガスの放出を自動的に２個の弁で遮断
するようにした装置が実公昭８０−３８８５８号公報で
提示されている。(b) Conventional technology If refrigerant gas leaks from the refrigerant pipes of an air conditioner, human life is at risk. Japanese Utility Model Publication No. 80-38858 discloses a device in which a valve is used to shut off the water.

（ハ）発明が解決しようとする課題 上記公報で提示の装置では２個の弁で遮断された冷媒管
内の冷媒が冷媒漏れ箇所から全て放出されるため、この
冷媒漏れが狭い居住室内で発生するとこの居住室内が酸
欠状態となり、人命に危険を及ぼす虞れがあった。(c) Problems to be Solved by the Invention In the device presented in the above publication, all the refrigerant in the refrigerant pipe that is shut off by two valves is released from the refrigerant leakage point, so if this refrigerant leakage occurs in a small living room, There was a lack of oxygen in the living room, posing a risk to human life.

本発明はかかる課題を解決した空気調和装置を提供する
ことを目的としたものである。An object of the present invention is to provide an air conditioner that solves these problems.

（ニ）課題を解決するための手段 本発明は圧縮機と室外熱交換器とを有する室外ユニット
と、室内熱交換器を有する室内ユニットとを配管接続し
た空気調和装置において、前記室内熱交換器と接続され
たガス管に第１の弁を、液管に第２の弁を設ける一方、
室内ユニットからの冷媒漏れを検出する検出手段と、こ
の検出手段からの信号で前記第２の弁を閉室させてポン
プダウン運転させた後に前記第１の弁を閉室させる制御
手段とを備えるようにしたものである。(d) Means for Solving the Problems The present invention provides an air conditioner in which an outdoor unit having a compressor and an outdoor heat exchanger and an indoor unit having an indoor heat exchanger are connected by piping. A first valve is provided in the gas pipe connected to the liquid pipe, and a second valve is provided in the liquid pipe,
A detection means for detecting refrigerant leakage from the indoor unit, and a control means for closing the second valve based on a signal from the detection means to cause pump down operation, and then closing the first valve. This is what I did.

又、圧縮機と室外熱交換器とを有する室外ユニットと、
室内熱交換器を有する室内ユニットとを配管接続し、前
記室外熱交換器と室内熱交換器とに圧縮機からの吐出冷
媒を可逆的に流して冷房サイクルと暖房サイクルを形成
する空気調和装置において、前記室内熱交換器と接続さ
れたガス管に第１の弁を、液管に第２の弁を設ける一方
、室内ユニットからの冷媒漏れを検出する検出手段と、
この検出手段からの信号で前記第２の弁を閉室させ且つ
暖房サイクルを冷房サイクルに切換えてポンプダウン運
転きせた後に前記第１の弁を閉室させる制御手段とを備
えるようにしたものである。Further, an outdoor unit having a compressor and an outdoor heat exchanger,
In an air conditioner in which an indoor unit having an indoor heat exchanger is connected by piping, and a refrigerant discharged from a compressor is reversibly flowed through the outdoor heat exchanger and the indoor heat exchanger to form a cooling cycle and a heating cycle. , a detection means for detecting refrigerant leakage from the indoor unit, while providing a first valve in the gas pipe connected to the indoor heat exchanger and a second valve in the liquid pipe;
The apparatus further includes a control means for closing the second valve in response to a signal from the detection means, switching the heating cycle to the cooling cycle, and causing the pump to perform a down-operation, and then closing the first valve.

（＊）作用 冷房又は暖房運転中に室内ユニットからの冷媒漏れを検
出すると、ポンプダウン運転が行なわれて室内ユニット
内の冷媒が室外ユニット内に回収されるため、居住室内
へ漏出する冷媒量は最小限に抑えられる。(*) If refrigerant leakage from the indoor unit is detected during cooling or heating operation, pump-down operation will be performed and the refrigerant in the indoor unit will be recovered into the outdoor unit, so the amount of refrigerant leaking into the living room will be reduced. Minimized.

（へ）実施例 本発明の一実施例を第１図に基づいて説明すると、（１
）は圧縮機（２）と四方弁（３）と室外熱交換器（４）
と受液器（５）とを有する室外ユニット、（６）は室内
熱交換器（７）と電気式膨張弁等の冷媒減圧器（８）と
を有する室内ユニットで、この室内熱交換器（７）とユ
ニット間配管（９）を介して接続されたガス管（１０）
に第１の弁（１１）を、他のユニット間配管（１２）を
介して接続された液管（１３）に第２の弁（１４）を設
けている。(f) Example One example of the present invention will be explained based on FIG.
) is the compressor (2), four-way valve (3), and outdoor heat exchanger (4)
and a liquid receiver (5), and (6) is an indoor unit that has an indoor heat exchanger (7) and a refrigerant pressure reducer (8) such as an electric expansion valve. 7) and the gas pipe (10) connected via the inter-unit pipe (9)
A first valve (11) is provided at the unit, and a second valve (14) is provided at a liquid pipe (13) connected via another inter-unit pipe (12).

（１５）は室内ユニット（６）に設けられ、この室内ユ
ニットの冷媒管から居住室内へ冷媒ガスが漏れると冷媒
ガスを構成するハロゲン元素を検出するかもしくは酸欠
を検出する冷媒漏れ検出手段、（１６）はこの検出手段
と連動して警報を発する警報器、（１７）は室外ユニッ
ト（１）に設けられ、検出手段（１５）からの信号で第
２の弁（１４）を閉本させてポンプダウン運転させた後
に第１の弁（１１）を閉室させる制御手段である。(15) is a refrigerant leak detection means provided in the indoor unit (6), which detects a halogen element constituting the refrigerant gas or detects oxygen deficiency when refrigerant gas leaks from the refrigerant pipe of the indoor unit into the living room; (16) is an alarm that issues an alarm in conjunction with this detection means, and (17) is installed in the outdoor unit (1) and closes the second valve (14) with a signal from the detection means (15). This is a control means that closes the first valve (11) after the pump is brought into down-operation.

本発明装置は以上の如く構成されており、冷房運転時は
四方弁（３）を実線状態に設定すると共に第１の弁（１
１）と第２の弁（１４）とを開くことにより圧縮機（２
）から吐出された冷媒は四方弁（３）−室外熱交換器（
４）−受液器（５）−第２の弁（１４）−ユニット間配
管（１２）−冷媒減圧器（８）−室内熱交換器（７）−
ユニット間配管（９）−第１の弁（１１）−四方弁（３
）圧縮機（２）と循環し、室外熱交換器（４）が凝縮器
として、室内熱交換器（７）が蒸発器として作用して居
住室内が冷房される。The device of the present invention is constructed as described above, and during cooling operation, the four-way valve (3) is set to the solid line state, and the first valve (1) is set to the solid line state.
1) and the second valve (14).
) The refrigerant discharged from the four-way valve (3) - outdoor heat exchanger (
4) - Liquid receiver (5) - Second valve (14) - Inter-unit piping (12) - Refrigerant pressure reducer (8) - Indoor heat exchanger (7) -
Inter-unit piping (9) - first valve (11) - four-way valve (3
) The outdoor heat exchanger (4) acts as a condenser and the indoor heat exchanger (7) acts as an evaporator, thereby cooling the living room.

又、暖房運転時は四方弁（３）を破線状態に設定すると
共に第１の弁（１１）と第２の弁（１４）とを開くこと
により圧縮機（２）から吐出された冷媒は四方弁（３）
−第１の弁（１１）−ユニット間配管（９）−室内熱交
換器（７）−冷媒減圧器（８）−ユニット間配管（１２
）−第２の弁（１４）−受液器（５）−室外熱交換器（
４）−四方弁（３）−圧縮機（２）と循環し、室内熱交
換器（７）が凝縮器として、室外熱交換器（４）が蒸発
器として作用して居住室内が暖房される。In addition, during heating operation, the four-way valve (3) is set to the broken line state, and the first valve (11) and second valve (14) are opened, so that the refrigerant discharged from the compressor (2) flows in all directions. Valve (3)
- First valve (11) - Inter-unit piping (9) - Indoor heat exchanger (7) - Refrigerant pressure reducer (8) - Inter-unit piping (12)
) - Second valve (14) - Receiver (5) - Outdoor heat exchanger (
4)-Four-way valve (3)-compressor (2) circulates, the indoor heat exchanger (7) acts as a condenser, and the outdoor heat exchanger (4) acts as an evaporator, heating the living room. .

かかる冷暖房運転中に室内ユニット（６）内の室内熱交
換器（７）や冷媒減圧器（８）の冷媒管接続箇所等から
冷媒ガスが漏れてこの室内ユニット（５ａ）が設置され
ている室内空間に放出されるとこれを冷媒漏れ検出手段
（１５）が検出して警報器（１６）が作動し冷媒漏れを
報知すると共に、この検出手段（１５）からの信号を入
力して制御手段（１７）から発せられる信号により、冷
房運転時には第２の弁（１４）が閉じ、暖房運転時には
四方弁（３）が実線状態に切り換わると共に第２の弁（
１４）が閉じ、ユニット間配管（１２）と室内ユニット
（６）内の配管とユニット間配管（９）内の冷媒を室外
ユニット（１）内に回収して室外熱交換器（４）及び受
液器（５）内に溜め込むポンプダウン運転が行なわれ、
この冷媒回収が終了すると圧縮機（２）が停止すると共
に第１の弁（１１）が閉じて冷媒が室外ユニット（１）
内に封じ込められる。この為、室内ユニット（６）が設
置された居住室内へ漏出する冷媒量は僅かであり、人命
に危険を及ぼす虞れはない。During this heating and cooling operation, refrigerant gas leaks from the refrigerant pipe connections of the indoor heat exchanger (7) and refrigerant pressure reducer (8) in the indoor unit (6), causing damage to the room where this indoor unit (5a) is installed. When released into the space, the refrigerant leakage detection means (15) detects it, activates the alarm (16), and notifies the refrigerant leakage, and inputs the signal from this detection means (15) to control the control means (15). 17), the second valve (14) is closed during cooling operation, and the four-way valve (3) is switched to the solid line state during heating operation, and the second valve (14) is closed during cooling operation.
14) is closed, and the refrigerant in the inter-unit piping (12), the piping in the indoor unit (6), and the inter-unit piping (9) is recovered into the outdoor unit (1), and the outdoor heat exchanger (4) and the refrigerant are collected in the outdoor unit (1). Pump down operation is performed to accumulate the liquid in the liquid container (5),
When this refrigerant recovery is completed, the compressor (2) is stopped, the first valve (11) is closed, and the refrigerant is transferred to the outdoor unit (1).
Contained within. Therefore, the amount of refrigerant leaking into the living room in which the indoor unit (6) is installed is small, and there is no risk of endangering human life.

第２図は本発明の他実施例であり、上記一実施例の室内
ユニット（６）の代わりに、室内熱交換器（７ａ）（７
ｂ）（７ｃ）と冷媒減圧器（８ａ）（８ｂ）（８ｃ）と
冷媒漏れ検出手段（１５ａ）（１５ｂバ１５ｃ）と警報
器（１６ａ）（１６ｂ）（１６ｃ）とを夫々有する複数
台の室内ユニット（６ａ）（６ｂ）（６ｃ）を設けた多
室型の空気調和装置を示したものである。各室内熱交換
器（７ａ）（７ｂ）（７ｃ）が蒸発器又は凝縮器として
作用して各居住室の全てが冷房又は暖房されている時に
、例えば室内ユニット（６ａ）から冷媒が漏出して冷媒
漏れ検出手段（１５ａ）が作動すると上記一実施例と同
様に警報器（ｔ６ａ）が作動すると共にポンプダウン運
転が行なわれて全室内ユニット（６ａ）（６ｂ）（６ｃ
）内の配管とユニット間配管（９）（１２）の冷媒が室
外ユニット（１）内に回収されるため、室内ユニット（
６ａ）が設置された狭い居住室内に他の室内ユニット（
６ｂ）（６ｃ）に内在している多量の冷媒ガスが放出し
てしまうことはなく、人命に危険を及ぼす虞れはない。FIG. 2 shows another embodiment of the present invention, in which an indoor heat exchanger (7a) (7
b) A plurality of units each having (7c), refrigerant pressure reducers (8a), (8b), (8c), refrigerant leak detection means (15a) (15b bar 15c), and alarm devices (16a), (16b), and (16c), respectively. This figure shows a multi-room air conditioner equipped with indoor units (6a), (6b), and (6c). When each indoor heat exchanger (7a) (7b) (7c) acts as an evaporator or condenser to cool or heat all of the living rooms, for example, refrigerant leaks from the indoor unit (6a). When the refrigerant leak detection means (15a) is activated, the alarm (t6a) is activated and the pump down operation is performed as in the above embodiment, and all indoor units (6a) (6b) (6c) are activated.
) and the inter-unit pipes (9) and (12) are collected in the outdoor unit (1), so the indoor unit (
6a) is installed in a small living room with other indoor units (
6b) A large amount of refrigerant gas contained in (6c) will not be released, and there is no danger to human life.

尚、上記再実施例において、冷暖房用の空気調和装置を
例に説明したが、冷房専用の空気調和装置でも本発明を
適用できる。又、第２の弁（１４）は室外熱交換器（４
）カら室内熱交換器（７）　、　＜７ｇ）＜７ｂ）（７
ｃ）に至る液管（１３）の何処でも良く、又、冷媒減圧
器＜８）　、　（８ａ）（８ｂ）＜８ｃ）である電気式
膨張弁を第２の弁（１４）として兼用しても良い。In the above embodiment, an air conditioner for heating and cooling is used as an example, but the present invention can also be applied to an air conditioner exclusively for cooling. Further, the second valve (14) is connected to the outdoor heat exchanger (4).
) indoor heat exchanger (7), <7g) <7b) (7
Any part of the liquid pipe (13) leading to c) may be used, and an electric expansion valve such as a refrigerant pressure reducer <8), (8a) (8b) <8c) may also be used as the second valve (14). Also good.

又、冷媒漏れ検出手段（１５）（１５ｇ）（１５ｂ）（
１５ｃ）としては上記実施例の如くハロゲン元素や酸欠
を検出する代わりに冷媒減圧器（８）（８ａ）（８ｂ）
（８ｃ）テある電気式膨張弁を全開しても冷媒過熱度を
とれない状態を検出するようにしても良い。Also, refrigerant leak detection means (15) (15g) (15b) (
As for 15c), instead of detecting halogen elements and oxygen deficiency as in the above embodiment, a refrigerant pressure reducer (8) (8a) (8b) is used.
(8c) A state in which the refrigerant cannot be superheated even if a certain electric expansion valve is fully opened may be detected.

（ト）発明の効果 本発明によれば、冷房又は暖房運転中に室内ユニットか
ら冷媒が漏れるとこの冷媒漏れを検出してポンプダウン
運転を行なって室内ユニット内の冷媒を室外ユニット内
に回収するようにしたので、室内ユニットの冷媒漏れ箇
所から居住室内へ漏出する冷媒は僅かな量に抑えられ、
人命に危険を及ぼすのを防止することができる。(G) Effects of the Invention According to the present invention, when refrigerant leaks from the indoor unit during cooling or heating operation, this refrigerant leak is detected and pump-down operation is performed to recover the refrigerant in the indoor unit into the outdoor unit. As a result, the amount of refrigerant leaking into the living room from the refrigerant leak point of the indoor unit is suppressed to a small amount.
It is possible to prevent danger to human life.

【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を示す空気調和装置の冷媒回
路図、第２図は本発明の他実施例を示す空気調和装置の
冷媒回路図である。 （１）・・・室外ユニット、　（２）・・・圧縮機、　
（４）・・・室外熱交換器、　（６）（６ａ）（６ｂ）
（６ｃ）−室内ユニット、　（７）（７ａ）（７ｂ）（
７ｃ）−室内熱交換器、　（８）（８ａ）（８ｂ）（８
ｃ）＝・冷媒減圧器、　（１０）・・・ガス管、　（１
１）・・・第１の弁、　（１３）・・・液管、　（１４
）・・・第２の弁、　（１５）（１５ａ）（１５ｂ）（
１５ｃ）・・・検出手段、　（１７）・・・制御手段。 第 図FIG. 1 is a refrigerant circuit diagram of an air conditioner showing one embodiment of the present invention, and FIG. 2 is a refrigerant circuit diagram of an air conditioner showing another embodiment of the invention. (1)...Outdoor unit, (2)...Compressor,
(4)...Outdoor heat exchanger, (6) (6a) (6b)
(6c) - Indoor unit, (7) (7a) (7b) (
7c) - Indoor heat exchanger, (8) (8a) (8b) (8
c) = Refrigerant pressure reducer, (10) Gas pipe, (1
1)...First valve, (13)...Liquid pipe, (14
)...Second valve, (15)(15a)(15b)(
15c)...detection means, (17)...control means. Diagram

Claims (2)

【特許請求の範囲】[Claims] （１）圧縮機と室外熱交換器とを有する室外ユニットと
、室内熱交換器を有する室内ユニットとを配管接続した
空気調和装置において、前記室内熱交換器と接続された
ガス管に第１の弁を、液管に第２の弁を設ける一方、室
内ユニットからの冷媒漏れを検出する検出手段と、この
検出手段からの信号で前記第２の弁を閉塞させてポンプ
ダウン運転させた後に前記第１の弁を閉塞させる制御手
段とを備えたことを特徴とする空気調和装置。(1) In an air conditioner in which an outdoor unit having a compressor and an outdoor heat exchanger and an indoor unit having an indoor heat exchanger are connected by piping, a gas pipe connected to the indoor heat exchanger has a first The valve is provided with a second valve in the liquid pipe, a detection means for detecting refrigerant leakage from the indoor unit, and a signal from the detection means to close the second valve and cause the pump to operate in a down state. An air conditioner comprising: a control means for closing the first valve. （２）圧縮機と室外熱交換器とを有する室外ユニットと
、室内熱交換器を有する室内ユニットとを配管接続し、
前記室外熱交換器と室内熱交換器とに圧縮機からの吐出
冷媒を可逆的に流して冷房サイクルと暖房サイクルを形
成する空気調和装置において、前記室内熱交換器と接続
されたガス管に第１の弁を、液管に第２の弁を設ける一
方、室内ユニットからの冷媒漏れを検出する検出手段と
、この検出手段からの信号で前記第２の弁を閉塞させ且
つ暖房サイクルを冷房サイクルに切換えてポンプダウン
運転させた後に前記第１の弁を閉塞させる制御手段とを
備えたことを特徴とする空気調和装置。(2) Piping connects an outdoor unit having a compressor and an outdoor heat exchanger and an indoor unit having an indoor heat exchanger,
In the air conditioner in which refrigerant discharged from a compressor flows reversibly through the outdoor heat exchanger and the indoor heat exchanger to form a cooling cycle and a heating cycle, a gas pipe connected to the indoor heat exchanger has a gas pipe connected to the indoor heat exchanger. A detection means for detecting refrigerant leakage from the indoor unit is provided, and a signal from the detection means closes the second valve and switches the heating cycle to the cooling cycle. and control means for closing the first valve after the pump is switched to the pump down state.
JP63292899A 1988-11-18 1988-11-18 Air conditioning apparatus Pending JPH02140574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63292899A JPH02140574A (en) 1988-11-18 1988-11-18 Air conditioning apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63292899A JPH02140574A (en) 1988-11-18 1988-11-18 Air conditioning apparatus

Publications (1)

Publication Number Publication Date
JPH02140574A true JPH02140574A (en) 1990-05-30

Family

ID=17787835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63292899A Pending JPH02140574A (en) 1988-11-18 1988-11-18 Air conditioning apparatus

Country Status (1)

Country Link
JP (1) JPH02140574A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH074796A (en) * 1993-06-18 1995-01-10 Mitsubishi Electric Corp Air-conditioning equipment
EP0936417A3 (en) * 1998-02-13 2002-07-10 Matsushita Electric Industrial Co., Ltd. Refrigerant leakage warning device
US7178347B2 (en) * 2000-04-28 2007-02-20 Daikin Industries, Ltd. Method for refrigerant and oil collecting operation and refrigerant and oil collection controller
US7832430B2 (en) 2006-05-25 2010-11-16 Rolls-Royce Plc Loss reduction apparatus
JP2015105808A (en) * 2013-12-02 2015-06-08 日立アプライアンス株式会社 Air conditioner
WO2016017643A1 (en) * 2014-07-28 2016-02-04 三菱電機株式会社 Air conditioner
JP2016223640A (en) * 2015-05-27 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 Refrigerating air conditioner
WO2017010007A1 (en) * 2015-07-16 2017-01-19 三菱電機株式会社 Air conditioner
WO2018003096A1 (en) * 2016-06-30 2018-01-04 三菱電機株式会社 Air-conditioning device
JPWO2018078729A1 (en) * 2016-10-25 2019-09-05 三菱電機株式会社 Refrigeration cycle equipment
CN110848875A (en) * 2018-08-21 2020-02-28 奥克斯空调股份有限公司 Refrigerant leakage detection method and air conditioner
CN110940046A (en) * 2018-09-21 2020-03-31 奥克斯空调股份有限公司 Refrigerant leakage detection method and air conditioner
EP3647684A1 (en) * 2018-10-31 2020-05-06 Vaillant GmbH Safety zone of the condenser
US11041666B2 (en) * 2016-10-17 2021-06-22 Daikin Industries, Ltd. Refrigeration apparatus
WO2021234857A1 (en) 2020-05-20 2021-11-25 ダイキン工業株式会社 Refrigeration cycle device
US11441820B2 (en) 2018-09-06 2022-09-13 Carrier Corporation Refrigerant leak detection system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01300170A (en) * 1988-05-25 1989-12-04 Daikin Ind Ltd Air conditioner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01300170A (en) * 1988-05-25 1989-12-04 Daikin Ind Ltd Air conditioner

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH074796A (en) * 1993-06-18 1995-01-10 Mitsubishi Electric Corp Air-conditioning equipment
EP0936417A3 (en) * 1998-02-13 2002-07-10 Matsushita Electric Industrial Co., Ltd. Refrigerant leakage warning device
US7178347B2 (en) * 2000-04-28 2007-02-20 Daikin Industries, Ltd. Method for refrigerant and oil collecting operation and refrigerant and oil collection controller
US7832430B2 (en) 2006-05-25 2010-11-16 Rolls-Royce Plc Loss reduction apparatus
JP2015105808A (en) * 2013-12-02 2015-06-08 日立アプライアンス株式会社 Air conditioner
WO2016017643A1 (en) * 2014-07-28 2016-02-04 三菱電機株式会社 Air conditioner
JPWO2016017643A1 (en) * 2014-07-28 2017-04-27 三菱電機株式会社 Air conditioner
US10451306B2 (en) 2014-07-28 2019-10-22 Mitsubishi Electric Corporation Air-conditioning apparatus
JP2016223640A (en) * 2015-05-27 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 Refrigerating air conditioner
WO2017010007A1 (en) * 2015-07-16 2017-01-19 三菱電機株式会社 Air conditioner
GB2564995A (en) * 2016-06-30 2019-01-30 Mitsubishi Electric Corp Air-conditioning device
JPWO2018003096A1 (en) * 2016-06-30 2019-02-14 三菱電機株式会社 Air conditioner
WO2018003096A1 (en) * 2016-06-30 2018-01-04 三菱電機株式会社 Air-conditioning device
GB2564995B (en) * 2016-06-30 2021-04-28 Mitsubishi Electric Corp Air-conditioning apparatus
US11041666B2 (en) * 2016-10-17 2021-06-22 Daikin Industries, Ltd. Refrigeration apparatus
JPWO2018078729A1 (en) * 2016-10-25 2019-09-05 三菱電機株式会社 Refrigeration cycle equipment
US11002467B2 (en) 2016-10-25 2021-05-11 Mitsubishi Electric Corporation Refrigeration cycle apparatus
CN110848875A (en) * 2018-08-21 2020-02-28 奥克斯空调股份有限公司 Refrigerant leakage detection method and air conditioner
CN110848875B (en) * 2018-08-21 2021-05-18 奥克斯空调股份有限公司 Refrigerant leakage detection method and air conditioner
US11441820B2 (en) 2018-09-06 2022-09-13 Carrier Corporation Refrigerant leak detection system
CN110940046A (en) * 2018-09-21 2020-03-31 奥克斯空调股份有限公司 Refrigerant leakage detection method and air conditioner
EP3647684A1 (en) * 2018-10-31 2020-05-06 Vaillant GmbH Safety zone of the condenser
WO2021234857A1 (en) 2020-05-20 2021-11-25 ダイキン工業株式会社 Refrigeration cycle device

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