WO2013038599A1 - Air conditioner - Google Patents

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Publication number
WO2013038599A1
WO2013038599A1 PCT/JP2012/005219 JP2012005219W WO2013038599A1 WO 2013038599 A1 WO2013038599 A1 WO 2013038599A1 JP 2012005219 W JP2012005219 W JP 2012005219W WO 2013038599 A1 WO2013038599 A1 WO 2013038599A1
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WIPO (PCT)
Prior art keywords
refrigerant
air conditioner
suction port
indoor unit
exhaust
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PCT/JP2012/005219
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French (fr)
Japanese (ja)
Inventor
川邉　義和
藤高　章
一彦 丸本
Original Assignee
パナソニック株式会社
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to JP2013533472A priority Critical patent/JP6016130B2/en
Priority to KR1020137023565A priority patent/KR20140064711A/en
Priority to CN201280010367.0A priority patent/CN103392102B/en
Publication of WO2013038599A1 publication Critical patent/WO2013038599A1/en

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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0041—Indoor units, e.g. fan coil units characterised by exhaustion of inside air from the room
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F25B2400/12—Inflammable refrigerants
    • 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

Definitions

  • the present invention relates to an air conditioner that forms a refrigeration and heat pump cycle using a refrigerant and performs air conditioning, and in particular, in an air conditioner that constitutes a cycle using a combustible refrigerant, leakage of the refrigerant is detected.
  • the present invention relates to a technique for exhausting air in an indoor unit.
  • HFC hydrofluorocarbons
  • HFO-1234yf Hydrofluoroolefin (hereinafter referred to as HFO) is attracting particular attention as an alternative refrigerant for HFC-134a, and its practical application to an air conditioner for automobiles is being promoted.
  • HFO-1234yf has a GWP (100 years) of 4, which is very small compared to HFC-134a GWP1430 and HFC-410A GWP2090 used in air conditioners and the like.
  • the characteristic that HFO-1234yf has a small GWP is attributed to the fact that it has a double bond between carbons and is easily decomposed.
  • HFCs having a relatively low GWP and usable as a refrigerant there are slightly flammable HFC-32 (GWP675), which accounts for 50% of HFC-410A, and weakly flammable HFC-152a (GWP124). Strongly flammable hydrocarbons also have excellent characteristics as refrigerants.
  • ammonia is used as a refrigerant.
  • Ammonia is not only flammable but also toxic, as with the above gases, and is therefore more difficult to handle than HFC-32. Therefore, in the air conditioner of Patent Document 1, a sensor for detecting leakage of the refrigerant is provided near the outlet of the indoor unit.
  • the air outlet damper When the leakage of the refrigerant is detected by the sensor, the air outlet damper is closed, while the air outlet damper is opened, and the indoor unit fan is rotated. Thereby, the air inside the indoor unit taken in from the intake port is sent to the exhaust port together with the leaked refrigerant by the rotation of the fan, and is exhausted outside the room.
  • An object of the present invention is to solve the above-described conventional problems, and in an air conditioner that uses a flammable refrigerant, the air conditioner has high exhaust efficiency of the leaked refrigerant, is small, and has excellent installation properties. Is to provide.
  • an air conditioner of the present invention is an air conditioner using a flammable refrigerant, and at least two or more refrigerants are added to an indoor unit arranged on the indoor side.
  • the exhaust means detects the concentration of the refrigerant in the indoor unit. High air is selectively sucked and exhausted to the outside.
  • the present invention it is possible to quickly detect leakage of the refrigerant and efficiently discharge the leaked refrigerant even with a small displacement, and it is possible to realize a small and excellent air conditioner.
  • FIG. 1 is a configuration diagram of an air conditioner according to an embodiment of the present invention.
  • the air conditioner of the present invention is an air conditioner that uses a flammable refrigerant, and the indoor unit disposed on the indoor side has at least two or more refrigerant detection means for detecting the refrigerant, and the indoor unit And exhaust means for exhausting the air inside the room to the outside, and when the refrigerant detection means detects the refrigerant, the exhaust means selectively sucks air having a high concentration of the refrigerant in the indoor unit to the outside. It is configured to exhaust. According to this configuration, it is possible to quickly detect the leakage of the refrigerant, efficiently exhaust the leaked refrigerant with a small displacement, and to realize a small-sized air conditioner with excellent installation properties.
  • the exhaust means includes a suction duct portion, an exhaust blower, and an exhaust duct, and the suction duct portion includes a suction port that sucks the leaked refrigerant, and a suction port drive device that moves the suction port; It is preferable that the suction port drive device is configured to move the suction port to a place near a place where the concentration of the refrigerant is high based on a detection result of the refrigerant detection means. . According to this configuration, with a simple configuration of one exhaust blower and one suction port driving device, it is possible to efficiently exhaust the leaked refrigerant with a small exhaust amount, and to provide a small and inexpensive air conditioner. it can.
  • the refrigerant detection means is disposed below the indoor unit. According to this structure, the leakage of the refrigerant heavier than air can be detected quickly, and an air conditioner having high safety can be provided.
  • the heat exchanger used in the indoor unit is a plate fin tube type heat exchanger, and the refrigerant detecting means is disposed at a portion where at least the tubes at both ends of the heat exchanger are exposed. It is preferable. According to this configuration, since the refrigerant detection means is arranged in a portion where the refrigerant is likely to leak and stay, it is possible to quickly detect the refrigerant leakage and to provide a highly safe air conditioner. can do.
  • the suction port driving device is configured to move the suction port substantially in parallel with a straight line connecting refrigerant detection means arranged at both ends of the heat exchanger.
  • the said suction inlet drive device can be comprised easily, and a small and cheap air conditioner can be provided.
  • FIG. 1 shows a configuration diagram of an air conditioner according to an embodiment of the present invention.
  • an indoor unit 100 of an air conditioner in the present embodiment includes an indoor fan 101 and a plate fin tube type indoor heat exchanger 102.
  • a gas side pipe 112 and a liquid side pipe 113 are connected to the indoor heat exchanger 102.
  • the gas side pipe 112 and the liquid side pipe 113 are connected to an outdoor unit (not shown) installed outside through a pipe hole 115 provided in the wall 114.
  • the outdoor unit includes a compressor (not shown), an outdoor heat exchanger (not shown), and the like.
  • HFO-1234yf is used as the refrigerant.
  • HFO-1234yf is a gas that has a low global warming potential (GWP) and has attracted attention as a next-generation refrigerant that replaces R134a and R410A.
  • GWP global warming potential
  • HFO-1234yf has slight flammability. For this reason, when HFO-1234yf leaks, there is a possibility of burning.
  • the air conditioner in the present embodiment includes at least two or more refrigerant detection means for detecting refrigerant leakage and an exhaust means for exhausting the air inside the indoor unit 100 to the outside in the indoor unit 100.
  • the exhaust means is configured to selectively suck in the air having a high refrigerant concentration in the indoor unit 100 and exhaust the air to the outside.
  • “at least two or more refrigerant detection means” are configured by the refrigerant detection sensors 103 to 105.
  • the “exhaust means” includes an exhaust blower 106, a suction duct 107, and an exhaust duct 110.
  • the suction duct 107 and the exhaust duct 110 are configured to be extendable and contracted, and one end of each is connected to the exhaust blower 106.
  • the exhaust blower 106 When any one or more of the refrigerant detection sensors 103 to 105 detect the leakage of the refrigerant, the exhaust blower 106 is driven.
  • the exhaust blower 106 sucks air inside the indoor unit 100 from the suction port 108 of the suction duct 107 as suction air 116 and discharges it from the exhaust duct 110 to the outside as exhaust 117. This greatly reduces the risk of HFO-1234yf burning.
  • the refrigerant detection sensors 103 to 105 for example, semiconductor type gas sensors can be used.
  • the refrigerant detection sensor 103 and the refrigerant detection sensor 105 are disposed at both ends of the indoor heat exchanger 102. More specifically, the refrigerant detection sensor 103 is disposed below the U-shaped tube side end of the indoor heat exchanger 102.
  • the refrigerant detection sensor 105 is disposed below the welding side end of the indoor heat exchanger 102.
  • the U-shaped tube side end and the welding side end are located at positions facing each other across the main body of the indoor heat exchanger 102.
  • the indoor heat exchanger 102 At both ends of the indoor heat exchanger 102, a refrigerant pipe (not shown) is exposed, condensation occurs on the surface of the refrigerant pipe, a hole is opened in the refrigerant pipe due to corrosion or the like, and the refrigerant is likely to leak. is there. Moreover, the both ends of the indoor heat exchanger 102 are places where the air blown by the indoor blower 101 is difficult to flow and the leaked refrigerant is likely to stay.
  • the refrigerant detection sensor 104 is disposed below the central portion of the indoor heat exchanger 102. Below the center part of the indoor heat exchanger 102 is a place where the refrigerant is easily detected when the refrigerant leaks from the heat exchange part of the indoor heat exchanger 102.
  • the suction duct 107 is provided with a suction port driving device 109 that moves the suction port 108.
  • the suction port drive device 109 is configured to move the suction port 108 along a straight line connecting the refrigerant detection sensor 103, the refrigerant detection sensor 104, and the refrigerant detection sensor 105.
  • the suction port 108, the suction port driving device 109, and the suction duct 107 constitute a “suction duct portion”.
  • the refrigerant detection sensors 103 to 105, the exhaust blower 106, and the suction port driving device 109 are electrically connected to the controller 111.
  • the controller 111 determines an appropriate position of the suction port 108 based on the output signals of the refrigerant detection sensors 103 to 105, controls the driving of the suction port driving device 109, and controls the driving of the exhaust blower 106.
  • the refrigerant detection sensors are provided at three locations, the refrigerant leakage can be detected more quickly than a conventional air conditioner provided with the refrigerant detection sensor only at one location. Can do.
  • the air conditioner it is possible to determine where in the indoor unit the refrigerant leaks based on the output signals of the refrigerant detection sensors 103 to 105. For example, when the output signal of the refrigerant detection sensor 104 is larger than the output signals of the refrigerant detection sensors 103 and 105, that is, the refrigerant concentration in the intake air 116 is much higher than the average refrigerant concentration inside the indoor unit 100. If it is high, it can be determined that the leakage point of the refrigerant is in the center of the indoor heat exchanger 102.
  • the suction port drive device 109 moves the suction port 108 to the vicinity of the refrigerant detection sensor 104, sucks the suction air 116 by the exhaust blower 106, and discharges it as the exhaust 117 through the exhaust duct 110.
  • the exhaust blower 106, the suction duct 107, and the exhaust duct 110 can be reduced in size, and as a result, the whole indoor unit 100 can be reduced in size and an air conditioner excellent in installation property can be realized.
  • the exhaust duct 110 can be guided to the outside through the piping hole 115 of the wall 114 together with the gas side piping 112 and the liquid side piping 113.
  • the need to provide piping holes can be eliminated.
  • the refrigerant detection sensors 103 to 105 are disposed below the indoor unit 100, the refrigerant leaks with a characteristic that it is heavier than air and moves downward. Can be detected.
  • coolant detection sensor 103 is arrange
  • the suction duct 107 is provided with the suction port drive device 109, and the suction port 108 is a straight line connecting the refrigerant detection sensor 103, the refrigerant detection sensor 104, and the refrigerant detection sensor 105. Therefore, the suction port 108 is quickly moved to the refrigerant leakage position estimated based on the output signals of the refrigerant detection sensors 103 to 105, and the air having the highest refrigerant concentration is quickly exhausted. Can do.
  • the suction port drive device 109 is provided in the suction duct 107 to move the suction port 108, but the present invention is not limited to this.
  • the suction duct 107 may be fixed, a plurality of dampers may be provided in the suction duct 107, and the suction position of the leaked refrigerant may be changed by controlling the opening and closing of the damper. With this configuration, the same effect as that of the air conditioner according to the present embodiment can be obtained.
  • moving the suction port 108 by the suction port driving device 109 can minimize the number of driving devices, and can finely control the moving position of the suction port 108, thereby improving exhaust efficiency. it can.
  • HFO-1234yf is used as the refrigerant, but the present invention is not limited to this.
  • HFO-1234ze or other HFO may be used as the refrigerant.
  • a mixed refrigerant containing HFO such as HFO-1234yf or HFO-1234ze, a single refrigerant such as HFC-32 or HFC-152a, a mixed refrigerant, or a hydrocarbon refrigerant may be used as the refrigerant. Even in this case, the same effect as the air conditioner according to the present embodiment can be obtained.
  • the present invention can increase the exhaust efficiency of the leaked refrigerant and can achieve downsizing and improve installation, so that it is not limited to an air conditioner, but a separate type showcase, refrigerator, heat pump type hot water It can be widely applied to vessels.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

In this air conditioner, which uses a flammable refrigerant, an indoor unit (100) disposed indoors is provided with the following: at least two refrigerant-detecting means (103, 105) that detect refrigerant; and an exhaust blower (106) whereby air inside the indoor unit (100) is vented outdoors. If a refrigerant-detecting means (103 or 105) detects refrigerant, the exhaust blower (106) selectively takes in high-refrigerant-concentration air in the indoor unit (100) and vents said air outdoors. This design makes it possible to efficiently vent leaked refrigerant with a small exhaust volume, allowing an air conditioner that has a small form factor and is easy to install.

Description

空気調和機Air conditioner
　本発明は、冷媒を用いて冷凍、ヒートポンプサイクルを構成し、冷暖房をおこなう空気調和機に関するものであり、特に、可燃性の冷媒を用いてサイクルを構成する空気調和機において、冷媒の漏洩を検知して、室内機内の空気を排気する技術に関するものである。 The present invention relates to an air conditioner that forms a refrigeration and heat pump cycle using a refrigerant and performs air conditioning, and in particular, in an air conditioner that constitutes a cycle using a combustible refrigerant, leakage of the refrigerant is detected. The present invention relates to a technique for exhausting air in an indoor unit.
　近年、地球温暖化が大きな問題となり、温暖化係数（以下、ＧＷＰという）の低い冷媒を使用しようという動きが顕著になっている。そこで、従来冷媒として使用されているハイドロフルオロカーボン（以下、ＨＦＣという）の代替冷媒として、自然冷媒や、炭素間に２重結合を有するハイドロフルオロオレフィンなどの冷媒が注目されている。 In recent years, global warming has become a major problem, and the movement to use a refrigerant with a low global warming potential (hereinafter referred to as GWP) has become prominent. Accordingly, natural refrigerants and refrigerants such as hydrofluoroolefins having a double bond between carbons have attracted attention as alternative refrigerants for hydrofluorocarbons (hereinafter referred to as HFC) that have been used as conventional refrigerants.
　ハイドロフルオロオレフィン（以下、ＨＦＯという）は、ＨＦＣ－１３４ａの代替冷媒として特に注目されており、自動車用エアコンディショナーへの実用化が推進されている。ＨＦＯ－１２３４ｙｆのＧＷＰ（１００年）は４であり、ＨＦＣ－１３４ａのＧＷＰ１４３０、エアコンなどで使用されているＨＦＣ-４１０ＡのＧＷＰ２０９０に比べてきわめて小さい。このＨＦＯ－１２３４ｙｆのＧＷＰが小さいという特性は、炭素間に２重結合を有し、分解し易いことに起因している。 Hydrofluoroolefin (hereinafter referred to as HFO) is attracting particular attention as an alternative refrigerant for HFC-134a, and its practical application to an air conditioner for automobiles is being promoted. HFO-1234yf has a GWP (100 years) of 4, which is very small compared to HFC-134a GWP1430 and HFC-410A GWP2090 used in air conditioners and the like. The characteristic that HFO-1234yf has a small GWP is attributed to the fact that it has a double bond between carbons and is easily decomposed.
　また、比較的ＧＷＰが低く冷媒として使用できるＨＦＣとしては、ＨＦＣ－４１０Ａの５０％を占める微燃性のＨＦＣ－３２（ＧＷＰ６７５）や、弱燃性のＨＦＣ－１５２ａ（ＧＷＰ１２４）などがある。また、強燃性の炭化水素も冷媒として優れた特性を有している。 Further, as HFCs having a relatively low GWP and usable as a refrigerant, there are slightly flammable HFC-32 (GWP675), which accounts for 50% of HFC-410A, and weakly flammable HFC-152a (GWP124). Strongly flammable hydrocarbons also have excellent characteristics as refrigerants.
　しかしながら、これらのガスはいずれも可燃性を有しているため、使用に当たっては、その取り扱いに十分な注意が必要である。可燃性のガスを安全に取り扱うように構成された従来の空気調和機の一つして、特許文献１に記載された空気調和機がある。 However, since these gases are all flammable, sufficient care must be taken when handling them. As one of conventional air conditioners configured to handle flammable gas safely, there is an air conditioner described in Patent Document 1.
　特許文献１に記載された空気調和機においては、冷媒としてアンモニアを使用する。アンモニアは、前記各ガスと同様に可燃性を有する一方で毒性も有するので、ＨＦＣ－３２などと比べるとさらに取り扱いは難しい。そこで、特許文献１の空気調和機においては、室内機の吹出し口付近に冷媒の漏洩を検知するセンサが設けられている。 In the air conditioner described in Patent Document 1, ammonia is used as a refrigerant. Ammonia is not only flammable but also toxic, as with the above gases, and is therefore more difficult to handle than HFC-32. Therefore, in the air conditioner of Patent Document 1, a sensor for detecting leakage of the refrigerant is provided near the outlet of the indoor unit.
　センサにより冷媒の漏洩が検知されると、吹出し口のダンパが閉じられる一方で、排気口のダンパが開けられ、室内機のファンが回転される。これにより、取込み口から取り込まれた室内機の内部の空気が、ファンの回転によって、漏洩した冷媒と共に排気口へ送られ室外に排気される。 When the leakage of the refrigerant is detected by the sensor, the air outlet damper is closed, while the air outlet damper is opened, and the indoor unit fan is rotated. Thereby, the air inside the indoor unit taken in from the intake port is sent to the exhaust port together with the leaked refrigerant by the rotation of the fan, and is exhausted outside the room.
　なお、特許文献１の空気調和機では、吸排気を室内機のファンで行っているが、特許文献２に記載された空気調和機のように、室内機のファンとは別のファンで排気を行うものもある。 In the air conditioner of Patent Document 1, intake and exhaust are performed by the fan of the indoor unit. However, as in the air conditioner described in Patent Document 2, exhaust is performed by a fan different from the fan of the indoor unit. Some things to do.
特許第３２９１４０７号公報Japanese Patent No. 3291407 特開平９－３２４９２８号公報JP-A-9-324928
　前記従来の空気調和機では、冷媒の漏洩を検知するセンサが吹出し口付近に１つ設けられているだけであるので、例えば、冷媒の漏洩箇所が熱交換器の両端部の風が抜けないところで発生した場合には、冷媒の漏洩の検知に時間がかかる。 In the conventional air conditioner, only one sensor for detecting refrigerant leakage is provided in the vicinity of the outlet, so that, for example, where the refrigerant leaks from where the wind at both ends of the heat exchanger does not escape. When it occurs, it takes time to detect refrigerant leakage.
　また、従来の空気調和機では、室内機のファンが室内機の内部の空気を選択することなく排気するため、十分な排気量を得るには、排気口の面積を大きくする必要がある。このため、装置自身が占有するスペースが大きくなると共に、設置工事も大掛かりになる。 Also, in the conventional air conditioner, since the fan of the indoor unit exhausts without selecting the air inside the indoor unit, it is necessary to increase the area of the exhaust port in order to obtain a sufficient exhaust amount. For this reason, the space occupied by the apparatus itself becomes large and the installation work becomes large.
　本発明の目的は、前記従来の課題を解決することにあって、可燃性を有する冷媒を使用する空気調和機において、漏洩した冷媒の排気効率が高く、小型で設置性に優れた空気調和機を提供することにある。 An object of the present invention is to solve the above-described conventional problems, and in an air conditioner that uses a flammable refrigerant, the air conditioner has high exhaust efficiency of the leaked refrigerant, is small, and has excellent installation properties. Is to provide.
　前記従来の課題を解決するために、本発明の空気調和機は、可燃性を有する冷媒を使用する空気調和機であって、室内側に配置される室内機に、少なくとも２つ以上の冷媒を検知する冷媒検知手段と、前記室内機の内部の空気を室外へ排気する排気手段とを備え、前記冷媒検知手段が前記冷媒を検知したとき、前記排気手段が前記室内機の前記冷媒の濃度の高い空気を選択的に吸い込んで室外へ排気するように構成されている。 In order to solve the above-mentioned conventional problems, an air conditioner of the present invention is an air conditioner using a flammable refrigerant, and at least two or more refrigerants are added to an indoor unit arranged on the indoor side. A refrigerant detecting means for detecting; and an exhaust means for exhausting the air inside the indoor unit to the outside. When the refrigerant detecting means detects the refrigerant, the exhaust means detects the concentration of the refrigerant in the indoor unit. High air is selectively sucked and exhausted to the outside.
　本発明によれば、前記冷媒の漏洩を素早く検知して、漏洩した前記冷媒を少ない排気量でも効率よく排気することができ、小型で設置性に優れた空気調和機を実現することができる。 According to the present invention, it is possible to quickly detect leakage of the refrigerant and efficiently discharge the leaked refrigerant even with a small displacement, and it is possible to realize a small and excellent air conditioner.
　本発明のこれらと他の目的と特徴は、添付された図面についての好ましい実施形態に関連した次の記述から明らかになる。この図面においては、
図１は、本発明の実施形態における空気調和機の構成図である。 These and other objects and features of the invention will become apparent from the following description taken in conjunction with the preferred embodiments with reference to the accompanying drawings. In this drawing,
FIG. 1 is a configuration diagram of an air conditioner according to an embodiment of the present invention.
　本発明の空気調和機は、可燃性を有する冷媒を使用する空気調和機であって、室内側に配置される室内機に、冷媒を検知する少なくとも２つ以上の冷媒検知手段と、前記室内機の内部の空気を室外へ排気する排気手段とを備え、前記冷媒検知手段が前記冷媒を検知したとき、前記排気手段が前記室内機の前記冷媒の濃度の高い空気を選択的に吸い込んで室外へ排気するように構成されている。この構成によれば、前記冷媒の漏洩を素早く検知して、漏洩した前記冷媒を少ない排気量でも効率よく排気することができ、小型で設置性に優れた空気調和機を実現することができる。 The air conditioner of the present invention is an air conditioner that uses a flammable refrigerant, and the indoor unit disposed on the indoor side has at least two or more refrigerant detection means for detecting the refrigerant, and the indoor unit And exhaust means for exhausting the air inside the room to the outside, and when the refrigerant detection means detects the refrigerant, the exhaust means selectively sucks air having a high concentration of the refrigerant in the indoor unit to the outside. It is configured to exhaust. According to this configuration, it is possible to quickly detect the leakage of the refrigerant, efficiently exhaust the leaked refrigerant with a small displacement, and to realize a small-sized air conditioner with excellent installation properties.
　なお、前記排気手段は、吸引ダクト部と、排気ブロワーと、排気ダクトとを備え、前記吸引ダクト部は、漏洩した冷媒を吸引する吸込口と、前記吸込口を移動させる吸込口駆動装置と、伸縮可能な吸引ダクトとを備え、前記吸込口駆動装置は、前記冷媒検知手段の検知結果に基づいて、前記冷媒の濃度が高い場所近くまで前記吸込口を移動させるように構成されることが好ましい。この構成によれば排気ブロワー１つと、前記吸込口駆動装置１つの簡単な構成で、漏洩した冷媒を少ない排気量でも効率よく排気することができ、小型で安価な空気調和機を提供することができる。 The exhaust means includes a suction duct portion, an exhaust blower, and an exhaust duct, and the suction duct portion includes a suction port that sucks the leaked refrigerant, and a suction port drive device that moves the suction port; It is preferable that the suction port drive device is configured to move the suction port to a place near a place where the concentration of the refrigerant is high based on a detection result of the refrigerant detection means. . According to this configuration, with a simple configuration of one exhaust blower and one suction port driving device, it is possible to efficiently exhaust the leaked refrigerant with a small exhaust amount, and to provide a small and inexpensive air conditioner. it can.
　また、前記冷媒検知手段は、室内機内の下方に配置されることが好ましい。この構成によれば、空気よりも重い冷媒の漏洩を素早く検知することができ、高い安全性を有する空気調和機を提供することができる。 Further, it is preferable that the refrigerant detection means is disposed below the indoor unit. According to this structure, the leakage of the refrigerant heavier than air can be detected quickly, and an air conditioner having high safety can be provided.
　また、前記室内機に用いられる熱交換器は、プレートフィンチューブ型の熱交換器であって、前記冷媒検知手段は、少なくとも前記熱交換器の両端部のチューブが露出している部分に配置されることが好ましい。この構成によれば、前記冷媒の漏洩及び滞留の可能性が高い部分に前記冷媒検知手段を配置するので、前記冷媒の漏洩を素早く検知することができ、高い安全性を有する空気調和機を提供することができる。 The heat exchanger used in the indoor unit is a plate fin tube type heat exchanger, and the refrigerant detecting means is disposed at a portion where at least the tubes at both ends of the heat exchanger are exposed. It is preferable. According to this configuration, since the refrigerant detection means is arranged in a portion where the refrigerant is likely to leak and stay, it is possible to quickly detect the refrigerant leakage and to provide a highly safe air conditioner. can do.
　また、前記吸込口駆動装置は、前記吸込口を、前記熱交換器の両端部に配置された冷媒検知手段同士を結ぶ直線と概略平行に移動させるように構成されることが好ましい。この構成によれば、前記吸込口駆動装置を簡単に構成することができ、小型で安価な空気調和機を提供することができる。 Further, it is preferable that the suction port driving device is configured to move the suction port substantially in parallel with a straight line connecting refrigerant detection means arranged at both ends of the heat exchanger. According to this structure, the said suction inlet drive device can be comprised easily, and a small and cheap air conditioner can be provided.
　以下、本発明の実施形態について、図面を参照しながら説明する。なお、この実施形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.
　（実施形態）
　図１は、本発明の実施形態における空気調和機の構成図を示すものである。 (Embodiment)
FIG. 1 shows a configuration diagram of an air conditioner according to an embodiment of the present invention.
　図１に示すように、本実施形態における空気調和機の室内機１００は、室内送風機１０１と、プレートフィンチューブ型の室内熱交換器１０２とを備えている。室内熱交換器１０２には、ガス側配管１１２と液側配管１１３とが接続されている。ガス側配管１１２と液側配管１１３とは、壁１１４に設けられた配管穴１１５を通じて、室外に設置された室外機（図示せず）と接続されている。室外機は、圧縮機（図示せず）や室外熱交換器（図示せず）などを備えている。 As shown in FIG. 1, an indoor unit 100 of an air conditioner in the present embodiment includes an indoor fan 101 and a plate fin tube type indoor heat exchanger 102. A gas side pipe 112 and a liquid side pipe 113 are connected to the indoor heat exchanger 102. The gas side pipe 112 and the liquid side pipe 113 are connected to an outdoor unit (not shown) installed outside through a pipe hole 115 provided in the wall 114. The outdoor unit includes a compressor (not shown), an outdoor heat exchanger (not shown), and the like.
　本実施形態における空気調和機では、冷媒として、ＨＦＯ－１２３４ｙｆを使用する。ＨＦＯ－１２３４ｙｆは、温暖化係数（ＧＷＰ）が小さく、Ｒ１３４ａやＲ４１０Ａに代わる次世代冷媒として注目をされているガスである。ＨＦＯ－１２３４ｙｆは、微燃性を有している。このため、ＨＦＯ－１２３４ｙｆが漏洩した場合、燃焼する可能性が有る。 In the air conditioner in this embodiment, HFO-1234yf is used as the refrigerant. HFO-1234yf is a gas that has a low global warming potential (GWP) and has attracted attention as a next-generation refrigerant that replaces R134a and R410A. HFO-1234yf has slight flammability. For this reason, when HFO-1234yf leaks, there is a possibility of burning.
　そこで、本実施形態における空気調和機は、室内機１００内に、冷媒の漏洩を検知する少なくとも２つ以上の冷媒検知手段と、室内機１００の内部の空気を室外へ排気する排気手段とを備え、冷媒検知手段が冷媒を検知したとき、排気手段が室内機１００の冷媒の濃度の高い空気を選択的に吸い込んで室外へ排気するように構成されている。 Therefore, the air conditioner in the present embodiment includes at least two or more refrigerant detection means for detecting refrigerant leakage and an exhaust means for exhausting the air inside the indoor unit 100 to the outside in the indoor unit 100. When the refrigerant detection means detects the refrigerant, the exhaust means is configured to selectively suck in the air having a high refrigerant concentration in the indoor unit 100 and exhaust the air to the outside.
　本実施形態において「少なくとも２つ以上の冷媒検知手段」は、冷媒検知センサ１０３～１０５により構成されている。また、本実施形態において「排気手段」は、排気ブロワー１０６と、吸引ダクト１０７と、排気ダクト１１０とにより構成されている。吸引ダクト１０７と排気ダクト１１０は、伸縮自在に構成され、それぞれ一端部が排気ブロワー１０６に接続されている。 In the present embodiment, “at least two or more refrigerant detection means” are configured by the refrigerant detection sensors 103 to 105. In the present embodiment, the “exhaust means” includes an exhaust blower 106, a suction duct 107, and an exhaust duct 110. The suction duct 107 and the exhaust duct 110 are configured to be extendable and contracted, and one end of each is connected to the exhaust blower 106.
　冷媒検知センサ１０３～１０５のいずれか１つ以上が冷媒の漏洩を検知したとき、排気ブロワー１０６が駆動される。排気ブロワー１０６は、吸引ダクト１０７の吸込口１０８から、室内機１００の内部の空気を吸込空気１１６として吸い込んで、排気ダクト１１０から室外へ排気１１７として排出する。これにより、ＨＦＯ－１２３４ｙｆが燃焼する危険性が大幅に低減される。 When any one or more of the refrigerant detection sensors 103 to 105 detect the leakage of the refrigerant, the exhaust blower 106 is driven. The exhaust blower 106 sucks air inside the indoor unit 100 from the suction port 108 of the suction duct 107 as suction air 116 and discharges it from the exhaust duct 110 to the outside as exhaust 117. This greatly reduces the risk of HFO-1234yf burning.
　冷媒検知センサ１０３～１０５としては、例えば、半導体型のガスセンサを用いることができる。冷媒検知センサ１０３と冷媒検知センサ１０５とは、室内熱交換器１０２の両端部に配置されている。より具体的には、冷媒検知センサ１０３は、室内熱交換器１０２のＵ字管側端部の下方に配置されている。冷媒検知センサ１０５は、室内熱交換器１０２の溶接側端部の下方に配置されている。Ｕ字管側端部と溶接側端部とは、室内熱交換器１０２の本体を挟んで対向する位置に位置する。 As the refrigerant detection sensors 103 to 105, for example, semiconductor type gas sensors can be used. The refrigerant detection sensor 103 and the refrigerant detection sensor 105 are disposed at both ends of the indoor heat exchanger 102. More specifically, the refrigerant detection sensor 103 is disposed below the U-shaped tube side end of the indoor heat exchanger 102. The refrigerant detection sensor 105 is disposed below the welding side end of the indoor heat exchanger 102. The U-shaped tube side end and the welding side end are located at positions facing each other across the main body of the indoor heat exchanger 102.
　室内熱交換器１０２の両端部は、冷媒管（図示せず）が露出し、冷媒管表面に結露を生じて、腐食などにより冷媒管に穴が開いて冷媒が漏洩する可能性が高い場所である。また、室内熱交換器１０２の両端部は、室内送風機１０１による風が流れにくく、漏洩した冷媒が滞留し易い場所である。 At both ends of the indoor heat exchanger 102, a refrigerant pipe (not shown) is exposed, condensation occurs on the surface of the refrigerant pipe, a hole is opened in the refrigerant pipe due to corrosion or the like, and the refrigerant is likely to leak. is there. Moreover, the both ends of the indoor heat exchanger 102 are places where the air blown by the indoor blower 101 is difficult to flow and the leaked refrigerant is likely to stay.
　冷媒検知センサ１０４は、室内熱交換器１０２の中央部の下方に配置されている。室内熱交換器１０２の中央部の下方は、室内熱交換器１０２の熱交換部から冷媒が漏洩した場合に、当該冷媒を検知し易い場所である。 The refrigerant detection sensor 104 is disposed below the central portion of the indoor heat exchanger 102. Below the center part of the indoor heat exchanger 102 is a place where the refrigerant is easily detected when the refrigerant leaks from the heat exchange part of the indoor heat exchanger 102.
　また、図１に示すように、吸引ダクト１０７には、吸込口１０８を移動させる吸込口駆動装置１０９が設けられている。吸込口駆動装置１０９は、冷媒検知センサ１０３と冷媒検知センサ１０４と冷媒検知センサ１０５とを結ぶ直線に沿って吸込口１０８を移動させるように構成されている。なお、本実施形態においては、吸込口１０８と、吸込口駆動装置１０９と、吸引ダクト１０７とにより、「吸引ダクト部」が構成されている。 As shown in FIG. 1, the suction duct 107 is provided with a suction port driving device 109 that moves the suction port 108. The suction port drive device 109 is configured to move the suction port 108 along a straight line connecting the refrigerant detection sensor 103, the refrigerant detection sensor 104, and the refrigerant detection sensor 105. In the present embodiment, the suction port 108, the suction port driving device 109, and the suction duct 107 constitute a “suction duct portion”.
　冷媒検知センサ１０３～１０５、排気ブロワー１０６、及び吸込口駆動装置１０９は、コントローラ１１１に電気的に接続されている。コントローラ１１１は、冷媒検知センサ１０３～１０５の出力信号に基づいて、吸込口１０８の適切な位置を判断し、吸込口駆動装置１０９の駆動を制御すると共に、排気ブロワー１０６の駆動を制御する。 The refrigerant detection sensors 103 to 105, the exhaust blower 106, and the suction port driving device 109 are electrically connected to the controller 111. The controller 111 determines an appropriate position of the suction port 108 based on the output signals of the refrigerant detection sensors 103 to 105, controls the driving of the suction port driving device 109, and controls the driving of the exhaust blower 106.
　本実施形態にかかる空気調和機によれば、冷媒検知センサを３箇所に設けているので、冷媒検知センサを１箇所にだけ設ける従来の空気調和機に比べて、冷媒の漏洩を素早く検知することができる。 According to the air conditioner according to the present embodiment, since the refrigerant detection sensors are provided at three locations, the refrigerant leakage can be detected more quickly than a conventional air conditioner provided with the refrigerant detection sensor only at one location. Can do.
　また、本実施形態にかかる空気調和機によれば、冷媒検知センサ１０３～１０５の出力信号に基づいて、冷媒が室内機のどの辺りで漏洩しているかを判断することもできる。例えば、冷媒検知センサ１０４の出力信号が冷媒検知センサ１０３，１０５の出力信号に比べて突出して大きい場合、すなわち、吸込空気１１６中の冷媒濃度が室内機１００の内部の平均の冷媒濃度よりもはるかに高い場合、冷媒の漏洩箇所が室内熱交換器１０２の中央部であると判断することができる。 In addition, according to the air conditioner according to the present embodiment, it is possible to determine where in the indoor unit the refrigerant leaks based on the output signals of the refrigerant detection sensors 103 to 105. For example, when the output signal of the refrigerant detection sensor 104 is larger than the output signals of the refrigerant detection sensors 103 and 105, that is, the refrigerant concentration in the intake air 116 is much higher than the average refrigerant concentration inside the indoor unit 100. If it is high, it can be determined that the leakage point of the refrigerant is in the center of the indoor heat exchanger 102.
　この場合、図１に示すように、吸込口駆動装置１０９により吸込口１０８を冷媒検知センサ１０４の近傍に移動させ、排気ブロワー１０６により吸込空気１１６を吸い込んで排気ダクト１１０を通じて室外へ排気１１７として排出させることで、少ない排気量でも効率よく漏洩した冷媒を室外へ排出することができる。これにより、排気ブロワー１０６、吸引ダクト１０７、及び排気ダクト１１０を小型化することができ、その結果、室内機１００全体を小型化して設置性の優れた空気調和機を実現することができる。また、排気ダクト１１０を小型化することにより、排気ダクト１１０を、ガス側配管１１２及び液側配管１１３と一緒に壁１１４の配管穴１１５を通じて室外へ導くことができるので、排気ダクト１１０の専用の配管穴を設ける必要性を無くすことができる。 In this case, as shown in FIG. 1, the suction port drive device 109 moves the suction port 108 to the vicinity of the refrigerant detection sensor 104, sucks the suction air 116 by the exhaust blower 106, and discharges it as the exhaust 117 through the exhaust duct 110. By doing so, it is possible to efficiently discharge the leaked refrigerant to the outside even with a small exhaust amount. Thereby, the exhaust blower 106, the suction duct 107, and the exhaust duct 110 can be reduced in size, and as a result, the whole indoor unit 100 can be reduced in size and an air conditioner excellent in installation property can be realized. Further, by reducing the size of the exhaust duct 110, the exhaust duct 110 can be guided to the outside through the piping hole 115 of the wall 114 together with the gas side piping 112 and the liquid side piping 113. The need to provide piping holes can be eliminated.
　また、本実施形態にかかる空気調和機によれば、冷媒検知センサ１０３～１０５を室内機１００内の下方に配置しているので、空気よりも重く下方に移動する特性を有する冷媒の漏洩を素早く検知することができる。 Further, according to the air conditioner according to the present embodiment, since the refrigerant detection sensors 103 to 105 are disposed below the indoor unit 100, the refrigerant leaks with a characteristic that it is heavier than air and moves downward. Can be detected.
　また、本実施形態にかかる空気調和機によれば、冷媒検知センサ１０３を室内熱交換器１０２のＵ字管側端部の下方に配置し、冷媒検知センサ１０５を室内熱交換器１０２の溶接側端部の下方に配置しているので、冷媒の漏洩を素早く検知することができる。 Moreover, according to the air conditioner concerning this embodiment, the refrigerant | coolant detection sensor 103 is arrange | positioned under the U-shaped pipe side edge part of the indoor heat exchanger 102, and the refrigerant | coolant detection sensor 105 is the welding side of the indoor heat exchanger 102. Since it arrange | positions under the edge part, the leakage of a refrigerant | coolant can be detected rapidly.
　なお、室内熱交換器１０２のＵ字管側端部及び溶接側端部の下方は、前述したように、冷媒が漏洩する可能性が高く、室内送風機１０１による風が流れにくく、漏洩した冷媒が滞留し易い場所である。このため、当該位置から離れた位置にのみ冷媒検知センサを設けた場合には、当該冷媒検知センサが前記位置から漏洩した冷媒を検知したときには既に、かなりの冷媒が漏洩してしまっている可能性がある。 In addition, as described above, there is a high possibility that the refrigerant leaks below the U-tube side end and the welding side end of the indoor heat exchanger 102, and the air blown by the indoor blower 101 is difficult to flow. It is a place where it is easy to stay. For this reason, when the refrigerant detection sensor is provided only at a position away from the position, there is a possibility that a considerable amount of refrigerant has already leaked when the refrigerant detection sensor detects the refrigerant leaked from the position. There is.
　また、本実施形態にかかる空気調和機によれば、吸引ダクト１０７に吸込口駆動装置１０９が設けられ、吸込口１０８が冷媒検知センサ１０３と冷媒検知センサ１０４と冷媒検知センサ１０５とを結ぶ直線に沿って移動するように構成されているので、冷媒検知センサ１０３～１０５の出力信号に基づいて推定した冷媒の漏洩位置に吸込口１０８を素早く移動させ、最も冷媒濃度の高い空気を素早く排気することができる。 Further, according to the air conditioner according to the present embodiment, the suction duct 107 is provided with the suction port drive device 109, and the suction port 108 is a straight line connecting the refrigerant detection sensor 103, the refrigerant detection sensor 104, and the refrigerant detection sensor 105. Therefore, the suction port 108 is quickly moved to the refrigerant leakage position estimated based on the output signals of the refrigerant detection sensors 103 to 105, and the air having the highest refrigerant concentration is quickly exhausted. Can do.
　なお、本発明は前記実施形態に限定されるものではなく、その他種々の態様で実施できる。例えば、前記では、吸引ダクト１０７に吸込口駆動装置１０９を設けて吸込口１０８を移動させるようにしたが、本発明はこれに限定されない。例えば、吸引ダクト１０７を固定し、当該吸引ダクト１０７に複数のダンパを設け、当該ダンパの開閉を制御することで、漏洩した冷媒の吸込み位置を変えるように構成してもよい。この構成によって、本実施形態にかかる空気調和機と同様の効果を得ることができる。なお、吸込口駆動装置１０９により吸込口１０８を移動させるほうが、駆動装置の数を最小に抑えることができ、また、吸込口１０８の移動位置の制御をきめ細かく行えるので、排気効率を良くすることができる。 In addition, this invention is not limited to the said embodiment, It can implement in another various aspect. For example, in the above description, the suction port drive device 109 is provided in the suction duct 107 to move the suction port 108, but the present invention is not limited to this. For example, the suction duct 107 may be fixed, a plurality of dampers may be provided in the suction duct 107, and the suction position of the leaked refrigerant may be changed by controlling the opening and closing of the damper. With this configuration, the same effect as that of the air conditioner according to the present embodiment can be obtained. In addition, moving the suction port 108 by the suction port driving device 109 can minimize the number of driving devices, and can finely control the moving position of the suction port 108, thereby improving exhaust efficiency. it can.
　また、前記では、冷媒としてＨＦＯ－１２３４ｙｆを使用したが、本発明はこれに限定されない。例えば、ＨＦＯ－１２３４ｚｅやその他のＨＦＯを冷媒として使用してもよい。また、ＨＦＯ－１２３４ｙｆ又はＨＦＯ－１２３４ｚｅなどのＨＦＯを含む混合冷媒、ＨＦＣ－３２やＨＦＣ－１５２ａなどの単一冷媒及び混合冷媒、炭化水素冷媒を冷媒として使用してもよい。この場合でも、本実施形態にかかる空気調和機と同様の効果を得ることができる。 In the above, HFO-1234yf is used as the refrigerant, but the present invention is not limited to this. For example, HFO-1234ze or other HFO may be used as the refrigerant. Further, a mixed refrigerant containing HFO such as HFO-1234yf or HFO-1234ze, a single refrigerant such as HFC-32 or HFC-152a, a mixed refrigerant, or a hydrocarbon refrigerant may be used as the refrigerant. Even in this case, the same effect as the air conditioner according to the present embodiment can be obtained.
　本発明は、添付図面を参照しながら好ましい実施の形態に関連して充分に記載されているが、この技術に熟練した人々にとっては種々の変形や修正は明白である。そのような変形や修正は、添付した請求の範囲による本発明の範囲から外れない限りにおいて、その中に含まれると理解されるべきである。 Although the present invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Such changes and modifications are to be understood as being included therein, so long as they do not depart from the scope of the present invention according to the appended claims.
　本発明は、漏洩した冷媒の排気効率を高くするとともに、小型化を実現し設置性を向上させることができるので、空気調和機に限らず、セパレート型のショーケースや冷凍機、ヒートポンプ式の温水器などにも広く適用することができる。 The present invention can increase the exhaust efficiency of the leaked refrigerant and can achieve downsizing and improve installation, so that it is not limited to an air conditioner, but a separate type showcase, refrigerator, heat pump type hot water It can be widely applied to vessels.
　１００　室内機
　１０１　室内送風機
　１０２　室内熱交換器
　１０３、１０４、１０５　冷媒検知センサ（冷媒検知手段）
　１０６　排気ブロワー（排気手段）
　１０７　吸引ダクト（排気手段、吸引ダクト部）
　１０８　吸込口（吸引ダクト部）
　１０９　吸込口駆動装置（吸引ダクト部）
　１１０　排気ダクト（排気手段）
　１１１　コントローラ
　１１２　ガス側配管
　１１３　液側配管
　１１４　壁
　１１５　配管穴
　１１６　吸込空気
　１１７　排気 DESCRIPTION OF SYMBOLS 100 Indoor unit 101 Indoor fan 102 Indoor heat exchanger 103, 104, 105 Refrigerant detection sensor (refrigerant detection means)
106 Exhaust blower (exhaust means)
107 Suction duct (exhaust means, suction duct)
108 Suction port (suction duct)
109 Suction port drive (suction duct)
110 Exhaust duct (exhaust means)
111 Controller 112 Gas side piping 113 Liquid side piping 114 Wall 115 Piping hole 116 Intake air 117 Exhaust

Claims (5)

  1. 可燃性を有する冷媒を使用する空気調和機であって、室内側に配置される室内機に、冷媒を検知する少なくとも２つ以上の冷媒検知手段と、前記室内機の内部の空気を室外へ排気する排気手段とを備え、前記冷媒検知手段が前記冷媒を検知したとき、前記排気手段が前記室内機の前記冷媒の濃度の高い空気を選択的に吸い込んで室外へ排気する、空気調和機。 An air conditioner that uses a flammable refrigerant, wherein the indoor unit arranged on the indoor side has at least two or more refrigerant detection means for detecting the refrigerant, and exhausts the air inside the indoor unit to the outside. An air conditioner, wherein when the refrigerant detecting means detects the refrigerant, the exhaust means selectively sucks air having a high concentration of the refrigerant in the indoor unit and exhausts it to the outside.
  2. 前記排気手段は、吸引ダクト部と、排気ブロワーと、排気ダクトとを備え、前記吸引ダクト部は、漏洩した冷媒を吸引する吸込口と、前記吸込口を移動させる吸込口駆動装置と、伸縮可能な吸引ダクトとを備え、前記吸込口駆動装置は、前記冷媒検知手段の検知結果に基づいて、前記冷媒の濃度が高い場所近くまで前記吸込口を移動させる、請求項１に記載の空気調和機。 The exhaust means includes a suction duct portion, an exhaust blower, and an exhaust duct, and the suction duct portion is extendable and retractable with a suction port that sucks the leaked refrigerant, and a suction port drive device that moves the suction port. The air conditioner according to claim 1, further comprising: a suction duct, wherein the suction port drive device moves the suction port to a location near a location where the concentration of the refrigerant is high based on a detection result of the refrigerant detection means. .
  3. 前記冷媒検知手段は、前記室内機内の下方に配置されている、請求項１又は２に記載の空気調和機。 The air conditioner according to claim 1 or 2, wherein the refrigerant detection means is disposed below the indoor unit.
  4. 前記室内機に用いられる熱交換器は、プレートフィンチューブ型の熱交換器であって、前記冷媒検知手段は、少なくとも前記熱交換器の両端部のチューブが露出している部分に配置されている、請求項３に記載の空気調和機。 The heat exchanger used for the indoor unit is a plate fin tube type heat exchanger, and the refrigerant detecting means is disposed at a portion where the tubes at both ends of the heat exchanger are exposed. The air conditioner according to claim 3.
  5. 前記吸込口駆動装置は、前記吸込口を、前記熱交換器の両端部に配置された冷媒検知手段同士を結ぶ直線と概略平行に移動させる、請求項４に記載の空気調和機。 5. The air conditioner according to claim 4, wherein the suction port driving device moves the suction port substantially parallel to a straight line connecting refrigerant detection means arranged at both ends of the heat exchanger.
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