JP6398373B2 - Air conditioner floor-mounted indoor unit - Google Patents

Air conditioner floor-mounted indoor unit Download PDF

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JP6398373B2
JP6398373B2 JP2014132727A JP2014132727A JP6398373B2 JP 6398373 B2 JP6398373 B2 JP 6398373B2 JP 2014132727 A JP2014132727 A JP 2014132727A JP 2014132727 A JP2014132727 A JP 2014132727A JP 6398373 B2 JP6398373 B2 JP 6398373B2
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refrigerant
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joint member
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JP2016011772A (en
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豪典 塩濱
豪典 塩濱
長谷川 隆
長谷川  隆
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Daikin Industries Ltd
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  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

Description

本発明は、空気調和機の床置式室内ユニットに関し、特に冷媒の漏洩対策に係る。     The present invention relates to a floor-mounted indoor unit of an air conditioner, and particularly relates to measures against refrigerant leakage.

従来より、室内の冷房や暖房を行う空気調和機が知られている。この種の空気調和機として、床面に設置される床置式の室内ユニットを有するものがある。     Conventionally, an air conditioner that performs indoor cooling or heating is known. As this kind of air conditioner, there is one having a floor-mounted indoor unit installed on the floor.

特許文献1に開示の床置式室内ユニットは、ケーシングの内部にドレンパン(仕切部)が配置される。ケーシングの内部では、ドレンパンの下側の空間にファンが収容され、ドレンパンの上側の空間に室内熱交換器が収容される。室内熱交換器は、連絡配管を介して冷媒回路に接続され、蒸発器又は凝縮器として機能する。     In the floor-mounted indoor unit disclosed in Patent Document 1, a drain pan (partition section) is disposed inside the casing. Inside the casing, the fan is accommodated in the space below the drain pan, and the indoor heat exchanger is accommodated in the space above the drain pan. The indoor heat exchanger is connected to the refrigerant circuit via a communication pipe and functions as an evaporator or a condenser.

この空気調和機では、ファンが作動することで、室内空気が下部空間、上部空間を順に流れ、室内熱交換器を通過する。空気調和機の冷房運転では、室内熱交換器が蒸発器として機能する。この結果、室内熱交換器では、冷媒が空気から吸熱して蒸発し、この空気が冷却される。空気調和機の暖房運転では、室内熱交換器が凝縮器として機能する。この結果、室内熱交換器では、冷媒が空気へ放熱して凝縮し、この空気が加熱される。     In this air conditioner, when the fan operates, room air flows through the lower space and the upper space in order, and passes through the indoor heat exchanger. In the cooling operation of the air conditioner, the indoor heat exchanger functions as an evaporator. As a result, in the indoor heat exchanger, the refrigerant absorbs heat from the air and evaporates, and the air is cooled. In the heating operation of the air conditioner, the indoor heat exchanger functions as a condenser. As a result, in the indoor heat exchanger, the refrigerant dissipates heat to the air and condenses, and the air is heated.

特開2011−94815号公報JP 2011-94815 A

上述したような空気調和機の床置式室内ユニットでは、室内熱交換器を有する室内配管のガス側端部や液側端部が、室外ユニットから配設される連絡配管と継手部材を介して連結される。配管の取り回しを考慮すると、この継手部材を室内ユニットのケーシング内に配置する構成が考えられる。これにより、継手部材がケーシングの外部へ露出させることなく、室内配管と連絡配管とを連結できる。     In the floor-mounted indoor unit of an air conditioner as described above, the gas-side end and the liquid-side end of an indoor pipe having an indoor heat exchanger are connected to a communication pipe disposed from the outdoor unit via a joint member. Is done. Considering the handling of the piping, a configuration in which the joint member is arranged in the casing of the indoor unit is conceivable. Thereby, indoor piping and connection piping can be connected, without exposing a joint member to the exterior of a casing.

一方、このようにケーシングの内部に継手部材を配置した構成において、万が一、継手部材から冷媒の漏洩が発生すると、この冷媒はケーシングの底部に徐々に溜まり込んでいく。この結果、ケーシングの底部では、冷媒の濃度が徐々に高くなっていく。ここで、冷媒回路に充填される冷媒として、例えばR32(HFC−32、ジフルオロメタン)等の可燃性の冷媒を用いた場合、濃縮された冷媒が発火するリスクが向上する。このため、ケーシングの底部で濃縮された冷媒が機外に漏れて何らかの機器等の着火源に曝されると、冷媒が発火してしまい、空気調和機の信頼性が損なわれるという問題が生じる。     On the other hand, in the configuration in which the joint member is arranged inside the casing as described above, if a refrigerant leaks from the joint member, the refrigerant gradually accumulates at the bottom of the casing. As a result, the concentration of the refrigerant gradually increases at the bottom of the casing. Here, when a flammable refrigerant such as R32 (HFC-32, difluoromethane) is used as the refrigerant filled in the refrigerant circuit, the risk of ignition of the concentrated refrigerant is improved. For this reason, if the refrigerant concentrated at the bottom of the casing leaks out of the machine and is exposed to an ignition source such as some equipment, the refrigerant ignites, and the reliability of the air conditioner is impaired. .

本発明は、かかる点に鑑みてなされたものであり、その目的は、継手部材から漏洩した冷媒がケーシングの底部に溜まり込んで濃縮されることを防止することである。     This invention is made | formed in view of this point, The objective is to prevent that the refrigerant | coolant which leaked from the coupling member accumulates in the bottom part of a casing, and is concentrated.

第1の発明は、空気調和装置の床置式室内ユニットを対象とし、ケーシング(40)と、上記ケーシング(40)の内部に収容され、可燃性の冷媒が流通する熱交換器(31)を有する室内配管(32)と、上記ケーシング(40)の内部に収容され、空気を搬送するファン(33)と、上記ケーシング(40)の内部に収容され、上記室内配管(32)の端部と、室外から配設される連絡配管(12,13)とを接続する少なくとも1つの継手部材(51,52)と、上記継手部材(51,52)から漏洩した冷媒を室外へ排出するための冷媒排出機構(60)とを備え、上記冷媒排出機構(60)は、上記継手部材(51,52)が収容される収容空間(62,82,97)を形成するカバー部材(61,81,95)と、上記カバー部材(61,81,95)の収容空間(62,82,97)と室外とを連通させる冷媒案内流路(71,91,96)とを有し、上記熱交換器(31)の下側に設置されるドレンパン(44)と、上記ドレンパン(44)に回収された凝縮水を上記ケーシング(40)の外部へ導くための排水管(44c)とを備え、上記冷媒案内流路(96)は、上記収容空間(97)と上記排水管(44c)とを連通させるように構成されることを特徴とする。なお、ここでいう「室外」は、室内の外部にある空間を意味し、例えば下水路等も含む意味である。 A first invention is directed to a floor-standing indoor unit of an air conditioner, and includes a casing (40) and a heat exchanger (31) accommodated in the casing (40) and through which a combustible refrigerant flows. An indoor pipe (32), a fan (33) housed in the casing (40) and carrying air, housed in the casing (40), and an end of the indoor pipe (32); At least one joint member (51, 52) that connects the communication pipes (12, 13) arranged from the outside, and refrigerant discharge for discharging the refrigerant leaking from the joint member (51, 52) to the outside A cover member (61, 81, 95) that forms an accommodation space (62, 82, 97) in which the joint member (51, 52) is accommodated. And a refrigerant guide channel (71, 91, 96) for communicating the accommodation space (62, 82, 97) of the cover member (61, 81, 95) with the outside A drain pan (44) installed under the heat exchanger (31), and a drain pipe (44c) for guiding the condensed water collected in the drain pan (44) to the outside of the casing (40). ), And the refrigerant guide channel (96) is configured to communicate the housing space (97) and the drain pipe (44c) . Here, “outdoor” means a space outside the room, and includes, for example, a sewer.

第1の発明では、熱交換器(31)を有する室内配管(32)が、継手部材(51,52)を介して連絡配管(12,13)と接続される。これにより、空気調和機の冷媒回路が構成される。床置式室内ユニットでは、ファン(33)が送風する空気と可燃性の冷媒とが熱交換器(31)で熱交換する。この結果、空気が冷却又は加熱され、室内の冷房や暖房が行われる。     In the first invention, the indoor pipe (32) having the heat exchanger (31) is connected to the connecting pipe (12, 13) via the joint member (51, 52). Thereby, the refrigerant circuit of an air conditioner is comprised. In the floor-standing indoor unit, the air blown by the fan (33) and the combustible refrigerant exchange heat with the heat exchanger (31). As a result, the air is cooled or heated, and indoor cooling or heating is performed.

本発明では、ケーシング(40)の内部に継手部材(51,52)が配置される。これより、継手部材(51,52)がケーシング(40)の外部に露出されることもない。一方、この継手部材(51,52)から冷媒が漏洩すると、冷媒排出機構(60)がこの冷媒を室外へ排出する。このため、継手部材(51,52)から漏洩した冷媒が、ケーシング(40)の底部に流れ落ちることを回避できる。     In the present invention, the joint members (51, 52) are arranged inside the casing (40). Thus, the joint member (51, 52) is not exposed to the outside of the casing (40). On the other hand, when the refrigerant leaks from the joint members (51, 52), the refrigerant discharge mechanism (60) discharges the refrigerant to the outside. For this reason, it can avoid that the refrigerant | coolant which leaked from the coupling member (51,52) flows down to the bottom part of a casing (40).

1及び第4の発明の冷媒排出機構(60)は、カバー部材(61,81,95)と冷媒案内流路(71,91,96)とを有している。カバー部材(61,81,95)は、継手部材(51,52)が収容される収容空間(62,82,97)を形成する。このため、継手部材(51,52)から漏洩した冷媒は、収容空間(62,82,97)に一時的に貯留される。冷媒案内流路(71,91,96)は、収容空間(62,82,97)と室外とを連通させる。このため、継手部材(51,52)での冷媒の漏洩に起因して収容空間(62,82,97)の内圧が上昇すると、収容空間(62,82,97)に溜まった冷媒が室外へと圧送される。 The refrigerant discharge mechanism (60) of the first and fourth inventions includes a cover member (61, 81, 95) and a refrigerant guide channel (71, 91, 96). The cover member (61, 81, 95) forms an accommodation space (62, 82, 97) in which the joint member (51, 52) is accommodated. For this reason, the refrigerant leaked from the joint member (51, 52) is temporarily stored in the accommodation space (62, 82, 97). The refrigerant guide channel (71, 91, 96) communicates the accommodation space (62, 82, 97) with the outside. For this reason, when the internal pressure of the storage space (62, 82, 97) rises due to the leakage of the refrigerant in the joint member (51, 52), the refrigerant accumulated in the storage space (62, 82, 97) goes outside. And pumped.


の発明では、熱交換器(31)の近傍で発生した凝縮水がドレンパン(44)に回収される。この凝縮水は、排水管(44c)を経由して室外(下水路を含む)へ排出される。継手部材(51,52)から冷媒が漏洩すると、この冷媒が収容空間(97)に貯留される。収容空間(97)の冷媒は、冷媒案内流路(96)を通じて排水管(44c)へ流出し、凝縮水と同様にして室外へ排出される。

In the first invention, the condensed water generated in the vicinity of the heat exchanger (31) is recovered in the drain pan (44). This condensed water is discharged out of the room (including the sewer) through the drain pipe (44c). When the refrigerant leaks from the joint members (51, 52), the refrigerant is stored in the accommodation space (97). The refrigerant in the storage space (97) flows out to the drain pipe (44c) through the refrigerant guide channel (96) and is discharged to the outside in the same manner as the condensed water.

の発明は、第の発明において、上記継手部材(51,52)は、上記室内配管(32)の液側端部と液側の上記連絡配管(12)とを接続する液側継手部材(51)と、上記室内配管(32)のガス側端部とガス側の上記連絡配管(13)とを接続するガス側継手部材(52)とで構成され、上記冷媒排出機構(60)は、上記液側継手部材(51)と上記ガス側継手部材(52)とを収容する1つの収容空間(97)を形成する1つの上記カバー部材(95)と、該カバー部材(95)の収容空間(97)と上記排水管(44c)とを連通する1つの上記冷媒案内流路(96)とを有していることを特徴とする。 In a second aspect based on the first aspect , the joint member (51, 52) is a liquid side joint for connecting the liquid side end of the indoor pipe (32) and the liquid side connecting pipe (12). The refrigerant discharge mechanism (60) includes a member (51) and a gas side joint member (52) connecting the gas side end of the indoor pipe (32) and the gas side connecting pipe (13). The one cover member (95) forming one storage space (97) for storing the liquid side joint member (51) and the gas side joint member (52), and the cover member (95) It has one said refrigerant | coolant guide flow path (96) which connects an accommodation space (97) and the said drain pipe (44c), It is characterized by the above-mentioned.

の発明では、液側継手部材(51)とガス側継手部材(52)とが1つのカバー部材(95)の1つの収容空間(97)に収容される。液側継手部材(51)やガス側継手部材(52)から漏洩した冷媒は、この収容空間(97)に貯留され、1つの冷媒案内流路(96)を通じて排水管(44c)へ送られる。この冷媒は、凝縮水と同様にして室外へ排出される。 In the second invention, the liquid side joint member (51) and the gas side joint member (52) are accommodated in one accommodation space (97) of one cover member (95). The refrigerant leaking from the liquid side joint member (51) and the gas side joint member (52) is stored in the accommodation space (97) and sent to the drain pipe (44c) through one refrigerant guide channel (96). This refrigerant is discharged outside the room in the same manner as the condensed water.

の発明は、第又は第の発明において、上記冷媒案内流路(96)は、上記排水管(44c)と接続するとともに、上記冷媒案内流路(96)の流入端(96a)よりも低い位置に配置される接続部(96b)を有していることを特徴とする。 According to a third invention, in the first or second invention, the refrigerant guide channel (96) is connected to the drain pipe (44c), and an inflow end (96a) of the refrigerant guide channel (96). It has the connection part (96b) arrange | positioned in a lower position than this, It is characterized by the above-mentioned.

の発明では、冷媒案内流路(96)における排水管(44c)の接続部(96b)の高さが、冷媒案内流路(96)の流入端(96a)よりも低い位置にある。このため、ドレンパン(44)から排水管(44c)へ流出した凝縮水が、冷媒案内流路(96)を逆流して収容空間(97)へ流出してしまうことを回避できる。 In the third invention, the height of the connecting portion (96b) of the drain pipe (44c) in the refrigerant guide channel (96) is lower than the inflow end (96a) of the refrigerant guide channel (96). For this reason, it is possible to avoid the condensed water flowing out from the drain pan (44) to the drain pipe (44c) from flowing backward into the accommodating space (97) through the refrigerant guide channel (96).

第4の発明は、空気調和装置の床置式室内ユニットであって、ケーシング(40)と、上記ケーシング(40)の内部に収容され、可燃性の冷媒が流通する熱交換器(31)を有する室内配管(32)と、上記ケーシング(40)の内部に収容され、空気を搬送するファン(33)と、上記ケーシング(40)の内部に収容され、上記室内配管(32)の端部と、室外から配設される連絡配管(12,13)とを接続する少なくとも1つの継手部材(51,52)と、上記継手部材(51,52)から漏洩した冷媒を室外へ排出するための冷媒排出機構(60)とを備え、上記冷媒排出機構(60)は、上記継手部材(51,52)が収容される収容空間(62,82,97)を形成するカバー部材(61,81,95)と、上記カバー部材(61,81,95)の収容空間(62,82,97)と室外とを連通させる冷媒案内流路(71,91,96)とを有し、上記カバー部材(95)は、上記継手部材(51,52)を外部へ露出させる位置と、該継手部材(51,52)を囲むとともに前記収容空間(62,82)を形成する位置との間を筒軸方向に伸縮可能に構成される筒壁部(63,83)を有していることを特徴とする。 A fourth invention is a floor-standing indoor unit of an air conditioner, and includes a casing (40) and a heat exchanger (31) accommodated in the casing (40) and through which a combustible refrigerant flows. An indoor pipe (32), a fan (33) housed in the casing (40) and carrying air, housed in the casing (40), and an end of the indoor pipe (32); At least one joint member (51, 52) that connects the communication pipes (12, 13) arranged from the outside, and refrigerant discharge for discharging the refrigerant leaking from the joint member (51, 52) to the outside A cover member (61, 81, 95) that forms an accommodation space (62, 82, 97) in which the joint member (51, 52) is accommodated. And a refrigerant guide channel (71, 91, 96) for communicating the accommodation space (62, 82, 97) of the cover member (61, 81, 95) with the outside And, the cover member (95) includes a position exposing said coupling member (51, 52) to the outside, the position for forming the receiving space (62, 82) surrounds the該継hand member (51, 52) It has the cylinder wall part (63,83) comprised so that expansion-contraction in the cylinder axis direction is possible.

の発明では、カバー部材(61,81)に筒壁部(63,83)が設けられる。筒壁部(63,83)が筒軸方向に収縮すると、継手部材(51,52)がカバー部材(61,81)の外部へ露出される。この状態において、継手部材(51,52)による室内配管(32)の端部と連絡配管(12,13)との連結作業を容易に行うことができる。筒壁部(63,83)が筒軸方向に伸張すると、継手部材(51,52)がカバー部材(61,81)で覆われ、収容空間(62,82)が形成される。 In the fourth invention, the cylindrical member (63, 83) is provided on the cover member (61, 81). When the cylindrical wall portion (63, 83) contracts in the cylindrical axis direction, the joint member (51, 52) is exposed to the outside of the cover member (61, 81). In this state, it is possible to easily connect the end of the indoor pipe (32) and the connecting pipe (12, 13) by the joint member (51, 52). When the cylindrical wall portion (63, 83) extends in the cylindrical axis direction, the joint member (51, 52) is covered with the cover member (61, 81), and the accommodation space (62, 82) is formed.

第5の発明は、第4の発明において、上記連絡配管(12,13)の周囲を覆う筒状の断熱部材(34a,35a)を備え、記カバー部材(61,81)の端部(65,85)は、上記収容空間(62,82)を形成する位置において上記断熱部材(34a,35a)と固定されることを特徴とする。 Fifth invention, in the fourth aspect, a cylindrical insulating member (34a, 35a) covering the periphery of the connection pipe (12, 13) provided with a end portion of the upper Symbol cover member (61, 81) ( 65, 85) is fixed to the heat insulating member (34a, 35a) at a position where the accommodation space (62, 82) is formed.

の発明は、第1乃至5のいずれか1つの発明において、上記連絡配管(12,13)の周囲を覆う筒状の断熱部材(12a,13a)を備え、上記冷媒案内流路(71,91,96)は、上記連絡配管(12,13)と上記断熱部材(12a,13a)との間に形成される隙間流路(71,91)で構成されることを特徴とする。 A sixth invention includes the cylindrical heat insulating member (12a, 13a) covering the periphery of the communication pipe (12, 13) in any one of the first to fifth inventions, and the refrigerant guide channel ( 71, 91, 96) is characterized by comprising gap channels (71, 91) formed between the connecting pipe (12, 13) and the heat insulating member (12a, 13a).

の発明では、連絡配管(12,13)の周囲が断熱部材(12a,13a)で覆われることで、連絡配管(12,13)の内部を流れる冷媒の熱ロスを防止できる。連絡配管(12,13)と断熱部材(12a,13a)との間には、僅かな隙間が形成され、この隙間が冷媒案内流路(71,91,96)となる隙間流路(71,91)を構成する。つまり、収容空間(62,82)に溜まった冷媒は、室外へと配設される連絡配管(12,13)に沿うように隙間流路(71,91)を流れ、室外へ排出される。 In 6th invention, the heat | fever loss of the refrigerant | coolant which flows through the inside of a connection pipe (12,13) can be prevented because the circumference | surroundings of a connection pipe (12,13) are covered with a heat insulation member (12a, 13a). A slight gap is formed between the connecting pipe (12, 13) and the heat insulating member (12a, 13a), and this gap serves as a refrigerant guide channel (71, 91, 96). 91). That is, the refrigerant accumulated in the accommodation space (62, 82) flows through the gap channel (71, 91) along the connecting pipe (12, 13) disposed outside the room, and is discharged outside the room.

の発明は、第の発明において、上記継手部材(51,52)は、上記室内配管(32)の液側端部と液側の上記連絡配管(12)とを接続する液側継手部材(51)と、上記室内配管(32)のガス側端部とガス側の上記連絡配管(13)とを接続するガス側継手部材(52)とで構成され、上記断熱部材(12a,13a)は、液側の上記連絡配管(12)の周囲を覆う液側断熱部材(12a)と、ガス側の上記連絡配管(13)の周囲を覆うガス側断熱部材(13a)とで構成され、上記冷媒排出機構(60)は、上記液側継手部材(51)が収容される液側の上記収容空間(62)を形成する液側の上記カバー部材(61)と、上記ガス側継手部材(52)が収容されるガス側の収容空間(82)を形成するガス側の上記カバー部材(81)とを有し、上記冷媒案内流路(71,91,96)は、上記液側のカバー部材(61)の収容空間(62)と室外とを連通させるように、液側の上記連絡配管(12)と上記液側断熱部材(12a)との間に形成される液側の上記隙間流路(70)と、上記ガス側のカバー部材(81)の収容空間(82)と室外とを連通させるように、ガス側の上記連絡配管(13)と上記ガス側断熱部材(13a)との間に形成されるガス側の上記隙間流路(90)とで構成されることを特徴とする。 In a seventh aspect based on the sixth aspect , the joint member (51, 52) is a liquid side joint that connects the liquid side end of the indoor pipe (32) to the liquid side connecting pipe (12). A member (51) and a gas side joint member (52) connecting the gas side end of the indoor pipe (32) and the gas side connecting pipe (13), and the heat insulating members (12a, 13a ) Is composed of a liquid side heat insulating member (12a) covering the periphery of the liquid side communication pipe (12) and a gas side heat insulating member (13a) covering the gas side of the communication pipe (13). The refrigerant discharge mechanism (60) includes a liquid side cover member (61) that forms the liquid side housing space (62) in which the liquid side joint member (51) is housed, and the gas side joint member ( 52) and a gas-side cover member (81) forming a gas-side containing space (82) in which the refrigerant-side flow path (71, 91, 96) is formed. -The gap on the liquid side formed between the connecting pipe (12) on the liquid side and the heat insulating member (12a) so that the accommodation space (62) of the member (61) communicates with the outside. The communication pipe (13) on the gas side and the heat insulating member (13a) on the gas side so that the flow path (70) communicates with the housing space (82) of the gas side cover member (81) and the outside. And the gap channel (90) on the gas side formed between them.

の発明では、室内配管(32)の液側端部と液側連絡配管(12)とが液側継手部材(51)で接続され、液側連絡配管(12)の周囲が液側断熱部材(12a)で覆われる。これにより、液側連絡配管(12)を流れる冷媒の熱ロスを防止できる。液側継手部材(51)から冷媒が漏洩すると、この冷媒は液側カバー部材(61)の収容空間(62)に貯留される。液側カバー部材(61)の収容空間(62)に溜まった冷媒は、室外へと配設される液側連絡配管(12)に沿うように液側隙間流路(71)を流れ、室外へ排出される。 In the seventh invention, the liquid side end of the indoor pipe (32) and the liquid side connecting pipe (12) are connected by the liquid side joint member (51), and the liquid side connecting pipe (12) is surrounded by the liquid side heat insulation. Covered with member (12a). Thereby, the heat loss of the refrigerant | coolant which flows through a liquid side connection piping (12) can be prevented. When the refrigerant leaks from the liquid side joint member (51), the refrigerant is stored in the accommodation space (62) of the liquid side cover member (61). The refrigerant accumulated in the accommodation space (62) of the liquid side cover member (61) flows through the liquid side clearance channel (71) along the liquid side communication pipe (12) arranged outside the room, and goes to the outside. Discharged.

の発明では、室内配管(32)のガス側端部とガス側連絡配管(13)とがガス側継手部材(52)で接続され、ガス側連絡配管(13)の周囲がガス側断熱部材(13a)で覆われる。これにより、ガス側連絡配管(13)を流れる冷媒の熱ロスを防止できる。ガス側継手部材(52)から冷媒が漏洩すると、この冷媒はガス側カバー部材(81)の収容空間(82)に貯留される。ガス側カバー部材(81)の収容空間(82)に溜まった冷媒は、室外へと配設されるガス側連絡配管(13)に沿うようにガス側隙間流路(91)を流れ、室外へ排出される。 In the seventh invention, the gas side end of the indoor pipe (32) and the gas side connecting pipe (13) are connected by the gas side joint member (52), and the periphery of the gas side connecting pipe (13) is insulated by the gas side. Covered with member (13a). Thereby, the heat loss of the refrigerant | coolant which flows through a gas side connection piping (13) can be prevented. When the refrigerant leaks from the gas side joint member (52), the refrigerant is stored in the accommodation space (82) of the gas side cover member (81). The refrigerant accumulated in the accommodation space (82) of the gas side cover member (81) flows through the gas side clearance channel (91) along the gas side communication pipe (13) arranged outside the room, and goes outside. Discharged.

第1及び第4の発明によれば、継手部材(51,52)から漏洩した冷媒を室外へ排出することで、ケーシング(40)の底部に高濃度の冷媒が溜まってしまうことを確実に防止できる。この結果、この冷媒の発火を確実に防止でき、空気調和機の信頼性を向上できる。 According to the first and fourth inventions, the refrigerant leaked from the joint members (51, 52) is discharged to the outside, thereby reliably preventing high-concentration refrigerant from accumulating at the bottom of the casing (40). it can. As a result, ignition of this refrigerant can be reliably prevented, and the reliability of the air conditioner can be improved.

第1及び第4の発明によれば、継手部材(51,52)から漏洩した冷媒を収容空間(62,82,97)の内圧を利用して室外まで搬送でき、冷媒排出機構(60)の簡素化、低コスト化を図ることができる。 According to the first and fourth inventions, the refrigerant leaked from the joint member (51, 52) can be conveyed to the outside using the internal pressure of the accommodation space (62, 82, 97), and the refrigerant discharge mechanism (60) Simplification and cost reduction can be achieved.

の発明によれば、連絡配管(12,13)と断熱部材(12a,13a)との間の隙間流路(71,91)を利用することで、冷媒を排出するための配管等を別途用いることなく、漏洩した冷媒を確実に室外へ排出できる。 According to the sixth invention, by using the gap flow path (71, 91) between the connecting pipe (12, 13) and the heat insulating member (12a, 13a), the pipe for discharging the refrigerant, etc. Without using it separately, the leaked refrigerant can be reliably discharged outside the room.

の発明によれば、液側継手部材(51)から漏洩した冷媒を液側連絡配管(12)に沿うように圧送して室外へ排出できる。また、ガス側継手部材(52)から漏洩した冷媒をガス側連絡配管(13)に沿うように圧送して室外へ排出できる。各連絡配管(12,13)と各断熱部材(12a,13a)との間の各隙間流路(71,91)をそれぞれ利用することで、各継手部材(51,52)から漏洩する冷媒を排出するために別途2本の配管を用いる必要もない。 According to the seventh aspect , the refrigerant leaked from the liquid side joint member (51) can be pumped along the liquid side connecting pipe (12) and discharged outside the room. Further, the refrigerant leaked from the gas side joint member (52) can be pumped along the gas side connecting pipe (13) and discharged to the outside. By using each gap channel (71, 91) between each connecting pipe (12, 13) and each heat insulating member (12a, 13a), the refrigerant leaking from each joint member (51, 52) There is no need to use two separate pipes for discharging.

また、本発明によれば、液側継手部材(51)とガス側継手部材(52)とが異なるカバー部材(61,81)に収容されるため、各継手部材(51,52)を流れる液冷媒とガス冷媒とが熱交換することを防止できる。また、このようにカバー部材(61,81)を2つ用いることで、各カバー部材(61,81)の内部の収容空間(62,82)の容積が比較的小さくなる。この結果、冷媒の漏れに起因する収容空間(62,82)での内圧の上昇を促すことができ、収容空間(62,82)の冷媒を速やかに排出できる。     Further, according to the present invention, since the liquid side joint member (51) and the gas side joint member (52) are accommodated in different cover members (61, 81), the liquid flowing through each joint member (51, 52) It is possible to prevent heat exchange between the refrigerant and the gas refrigerant. Further, by using two cover members (61, 81) in this way, the volume of the accommodating space (62, 82) inside each cover member (61, 81) becomes relatively small. As a result, an increase in internal pressure in the accommodation space (62, 82) due to refrigerant leakage can be promoted, and the refrigerant in the accommodation space (62, 82) can be quickly discharged.

の発明によれば、継手部材(51,52)から漏洩した冷媒を排水管(44c)へ送ることで、この冷媒を凝縮水と同様にして室外へ排出できる。つまり、排水管(44c)は、凝縮水と冷媒の双方を排出する配管を兼ねているので、部品点数を削減できる。 According to the first invention, the refrigerant leaking from the joint members (51, 52) is sent to the drain pipe (44c), so that the refrigerant can be discharged to the outside in the same manner as the condensed water. That is, since the drain pipe (44c) also serves as a pipe for discharging both the condensed water and the refrigerant, the number of parts can be reduced.

の発明によれば、各継手部材(51,52)からそれぞれ漏洩した冷媒を1つのカバー部材(95)の収容空間(97)に貯留し、1つの冷媒案内流路(96)より室外へ排出するようにしたので、冷媒排出機構(60)の簡素化、低コスト化を図ることができる。 According to the second invention, the refrigerant leaked from each joint member (51, 52) is stored in the accommodation space (97) of one cover member (95), and is outdoors from one refrigerant guide channel (96). Therefore, the refrigerant discharge mechanism (60) can be simplified and the cost can be reduced.

の発明によれば、凝縮水が冷媒案内流路(96)を逆流して収容空間(97)に流出してしまうことを防止でき、収容空間(97)の冷媒を確実に室外へ排出できる。 According to the third aspect of the present invention, it is possible to prevent the condensed water from flowing backward into the refrigerant guide channel (96) and outflowing into the storage space (97), and reliably discharge the refrigerant in the storage space (97) to the outside. it can.

の発明によれば、カバー部材(61,81)の筒壁部(63,83)を収縮させることで、継手部材(51,52)の連結作業や取外し作業を容易に行うことができる。 According to the fourth aspect of the present invention, the connecting and removing operations of the joint members (51, 52) can be easily performed by contracting the cylindrical wall portions (63, 83) of the cover members (61, 81). .

図1は、実施形態に係る空気調和機の概略構成を示す配管系統図である。FIG. 1 is a piping system diagram illustrating a schematic configuration of an air conditioner according to an embodiment. 図2は、実施形態に係る空気調和機の床置式室内ユニットの正面図である。FIG. 2 is a front view of the floor-mounted indoor unit of the air conditioner according to the embodiment. 図3は、実施形態に係る空気調和機の床置式室内ユニットの内部構造を示す正面図である。FIG. 3 is a front view showing the internal structure of the floor-standing indoor unit of the air conditioner according to the embodiment. 図4は、実施形態に係る空気調和機の床置式室内ユニットの内部構造を示す側面図である。FIG. 4 is a side view showing the internal structure of the floor-standing indoor unit of the air conditioner according to the embodiment. 図5は、実施形態に係る冷媒排出機構を拡大した概略の構成図である。FIG. 5 is an enlarged schematic configuration diagram of the refrigerant discharge mechanism according to the embodiment. 図6は、実施形態に係る液側カバー部材の近傍を拡大した縦断面図であり、図6(A)は液側カバー部材が液側継手部材を外部へ露出させる第1位置に収縮した状態を示し、図6(B)は液側カバー部材が液側継手部材を覆う第2位置に伸張した状態を示している。FIG. 6 is an enlarged longitudinal sectional view of the vicinity of the liquid side cover member according to the embodiment, and FIG. 6A is a state in which the liquid side cover member is contracted to the first position where the liquid side joint member is exposed to the outside. FIG. 6B shows a state where the liquid side cover member extends to the second position covering the liquid side joint member. 図7は、実施形態に係るガス側カバー部材の近傍を拡大した縦断面図であり、図7(A)はガス側カバー部材がガス側継手部材を外部へ露出させる第1位置に収縮した状態を示し、図7(B)はガス側カバー部材がガス側継手部材を覆う第2位置に伸張した状態を示している。FIG. 7 is an enlarged longitudinal sectional view of the vicinity of the gas side cover member according to the embodiment, and FIG. 7A is a state in which the gas side cover member is contracted to the first position exposing the gas side joint member to the outside. FIG. 7B shows a state where the gas side cover member extends to the second position covering the gas side joint member. 図8は、変形例に係る冷媒排出機構を拡大した概略の構成図である。FIG. 8 is an enlarged schematic configuration diagram of the refrigerant discharge mechanism according to the modification.

以下、本発明の実施形態を図面に基づいて詳細に説明する。なお、以下の実施形態は、本質的に好ましい例示であって、本発明、その適用物、あるいはその用途の範囲を制限することを意図するものではない。     Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

〈空気調和機の全体構成〉
本発明に係る空気調和機(10)は、室内の冷房や暖房を行うように構成されている。図1に示すように、空気調和機(10)は、室外ユニット(20)と、室内ユニット(30)とを有し、これらのユニット(20,30)が2本の連絡配管(12,13)に接続されて構成される。これにより、空気調和機(10)には、冷媒が循環する冷媒回路(11)が構成される。冷媒回路(11)では、充填された冷媒が循環することで、蒸気圧縮式の冷凍サイクルが行われる。本実施形態の冷媒回路(11)には、可燃性の冷媒であるR32(ジフルオロメタン)が充填されている。
<Overall configuration of air conditioner>
The air conditioner (10) according to the present invention is configured to perform indoor cooling and heating. As shown in FIG. 1, the air conditioner (10) has an outdoor unit (20) and an indoor unit (30), and these units (20, 30) are connected to two connecting pipes (12, 13). ) And configured. Thereby, the air conditioner (10) is configured with a refrigerant circuit (11) through which the refrigerant circulates. In the refrigerant circuit (11), a vapor compression refrigeration cycle is performed by circulating the filled refrigerant. The refrigerant circuit (11) of this embodiment is filled with R32 (difluoromethane) which is a flammable refrigerant.

〔室外ユニット〕
室外ユニット(20)は、室外に設置されている。室外ユニット(20)は、各々、ケーシング(図示省略)に収容される、圧縮機(21)、室外熱交換器(22)、室外膨張弁(23)、四方切換弁(24)、及び室外ファン(25)を有している。
[Outdoor unit]
The outdoor unit (20) is installed outdoors. The outdoor unit (20) is housed in a casing (not shown), each of which includes a compressor (21), an outdoor heat exchanger (22), an outdoor expansion valve (23), a four-way switching valve (24), and an outdoor fan (25)

圧縮機(21)は、低圧の冷媒を吸入して圧縮し、圧縮した後の高圧冷媒を吐出するように構成される。室外熱交換器(22)は、その内部を流れる冷媒と、室外ファン(25)が搬送する室外空気とを熱交換させる。室外膨張弁(23)は、高圧の冷媒を低圧まで減圧する、例えば電子膨張弁で構成される。四方切換弁(24)は、圧縮機(21)の吐出部に繋がる第1ポートと、圧縮機(21)の吸入部に繋がる第2ポートと、室外熱交換器(22)のガス側端部に繋がる第3ポートと、ガス側連絡配管(13)に繋がる第4ポートとを有する。四方切換弁(24)は、第1ポートと第3ポートが連通し且つ第2ポートと第4ポートが連通する第1状態(図1の破線で示す状態)と、第1ポートと第4ポートが連通し且つ第2ポートと第3ポートが連通する第2状態(図1の実線で示す状態)とに切換可能に構成される。     The compressor (21) is configured to suck in and compress a low-pressure refrigerant and discharge the compressed high-pressure refrigerant. The outdoor heat exchanger (22) exchanges heat between the refrigerant flowing through the outdoor heat exchanger (22) and the outdoor air conveyed by the outdoor fan (25). The outdoor expansion valve (23) is configured by, for example, an electronic expansion valve that depressurizes high-pressure refrigerant to a low pressure. The four-way switching valve (24) has a first port connected to the discharge part of the compressor (21), a second port connected to the suction part of the compressor (21), and a gas side end of the outdoor heat exchanger (22). And a fourth port connected to the gas side communication pipe (13). The four-way switching valve (24) includes a first state (state indicated by a broken line in FIG. 1) in which the first port and the third port communicate and the second port and the fourth port communicate, and the first port and the fourth port. Can be switched to a second state (state indicated by a solid line in FIG. 1) in which the second port and the third port communicate with each other.

〔連絡配管〕
空気調和機(10)は、液側連絡配管(12)とガス側連絡配管(13)とを有している。液側連絡配管(12)の一端は、室外膨張弁(23)に繋がっている。液側連絡配管(12)の他端は、室内ユニット(30)の液側継手部材(51)に繋がっている。ガス側連絡配管(13)の一端は、四方切換弁(24)の第4ポートに繋がっている。ガス側連絡配管(13)の他端は、室内ユニット(30)のガス側継手部材(52)に繋がっている。
[Communication piping]
The air conditioner (10) has a liquid side connecting pipe (12) and a gas side connecting pipe (13). One end of the liquid side connection pipe (12) is connected to the outdoor expansion valve (23). The other end of the liquid side connecting pipe (12) is connected to the liquid side joint member (51) of the indoor unit (30). One end of the gas side communication pipe (13) is connected to the fourth port of the four-way switching valve (24). The other end of the gas side communication pipe (13) is connected to the gas side joint member (52) of the indoor unit (30).

液側連絡配管(12)の周囲は、筒状の液側断熱部材(12a)で覆われている。ガス側連絡配管(13)の周囲は、筒状のガス側断熱部材(13a)で覆われている。     The periphery of the liquid side connecting pipe (12) is covered with a cylindrical liquid side heat insulating member (12a). The periphery of the gas side communication pipe (13) is covered with a cylindrical gas side heat insulating member (13a).

〔室内ユニット〕
室内ユニット(30)は、室内の床面に設置される床置式の室内ユニットを構成している。室内ユニット(30)は、室内熱交換器(31)を有する室内配管(32)と、室内ファン(33)とを有している。室内熱交換器(31)は、その内部を流れる冷媒と、室内ファン(33)が搬送する室内空気とを熱交換させる。室内配管(32)のガス側端部は、ガス側継手部材(52)に繋がり、室内配管(32)の液側端部は、液側継手部材(51)に繋がっている。
[Indoor unit]
The indoor unit (30) constitutes a floor-standing indoor unit installed on the floor surface of the room. The indoor unit (30) has an indoor pipe (32) having an indoor heat exchanger (31) and an indoor fan (33). The indoor heat exchanger (31) exchanges heat between the refrigerant flowing through the indoor heat exchanger (31) and the indoor air conveyed by the indoor fan (33). The gas side end of the indoor pipe (32) is connected to the gas side joint member (52), and the liquid side end of the indoor pipe (32) is connected to the liquid side joint member (51).

〈室内ユニットの詳細な構成〉
室内ユニット(30)の構成について、図2〜図5を参照しながら更に詳細に説明する。
<Detailed configuration of indoor unit>
The configuration of the indoor unit (30) will be described in more detail with reference to FIGS.

〔ケーシング〕
室内ユニット(30)は、室内の床面に設置されるケーシング(40)を備えている。ケーシング(40)は、縦長の直方体状の箱形に形成され、例えば室内の壁面に沿うように配置される。ケーシング(40)は、その前側(図4における左側)に前面パネル(41)を有している。前面パネル(41)は、ケーシング(40)の本体に対して着脱可能に構成される。図3は、ケーシング(40)の本体から前面パネル(41)を取り外した状態を表している。
〔casing〕
The indoor unit (30) includes a casing (40) installed on the floor surface of the room. The casing (40) is formed in a vertically long rectangular parallelepiped box shape, and is disposed, for example, along an indoor wall surface. The casing (40) has a front panel (41) on the front side (left side in FIG. 4). The front panel (41) is configured to be detachable from the main body of the casing (40). FIG. 3 shows a state in which the front panel (41) is removed from the main body of the casing (40).

前面パネル(41)の下部(下側の略半分の部分)には、吸込グリル(42)が形成されている。吸込グリル(42)は、室内空気が吸い込まれる吸込部を構成している。前面パネル(41)の上部(ケーシング(40)の天板寄りの部分)には、吹出グリル(43)が形成されている。吹出グリル(43)は、室内熱交換器(31)を通過した空気が吹きだされる吹出部を構成している。     A suction grill (42) is formed in the lower part (substantially half of the lower part) of the front panel (41). The suction grill (42) constitutes a suction portion into which room air is sucked. A blow-out grill (43) is formed on the upper portion of the front panel (41) (the portion near the top plate of the casing (40)). The blow-out grill (43) constitutes a blow-out section through which the air that has passed through the indoor heat exchanger (31) is blown out.

〔ドレンパン〕
図3〜図5に示すように、ケーシング(40)の内部にはドレンパン(44)が設けられている。ドレンパン(44)は、室内熱交換器(31)の近傍で発生した凝縮水を回収する容器を構成している。ドレンパン(44)は、ケーシング(40)の高さ方向の中間部に配置される。ドレンパン(44)は、ケーシング(40)の内部を上下に区画する仕切部を構成している。
[Drain pan]
As shown in FIGS. 3 to 5, a drain pan (44) is provided inside the casing (40). The drain pan (44) constitutes a container that collects condensed water generated in the vicinity of the indoor heat exchanger (31). The drain pan (44) is disposed at an intermediate portion in the height direction of the casing (40). The drain pan (44) constitutes a partition that divides the interior of the casing (40) vertically.

図5に示すように、ドレンパン(44)の底壁部(44a)には、排水口(44b)が形成されている。排水口(44b)は、ドレンパン(44)の下側に配設される排水管(44c)と繋がっている。排水管(44c)は、下部空間(45)を下方に延び、ケーシング(40)を貫通して室外(室内を除く空間であって、例えば下水道も含む)まで配設される。     As shown in FIG. 5, the drain wall (44b) is formed in the bottom wall part (44a) of the drain pan (44). The drain port (44b) is connected to a drain pipe (44c) disposed below the drain pan (44). The drain pipe (44c) extends downward through the lower space (45), passes through the casing (40), and is disposed outside the room (a space excluding the room, including, for example, a sewer).

〔ケーシングの収容空間〕
ケーシング(40)の内部では、ドレンパン(44)の下側に下部空間(45)が形成され、ドレンパン(44)の上側に上部空間(46)が形成されている。下部空間(45)と上部空間(46)とは、中間空間(47)を介して互いに連通している。下部空間(45)の流入側は吸込グリル(42)の空気流路と連通し、上部空間(46)の流出側は吹出グリル(43)の空気流路と連通している。つまり、ケーシング(40)では、吸込グリル(42)、下部空間(45)、中間空間(47)、上部空間(46)、吹出グリル(43)の順に室内空気が流れる。
[Case housing space]
In the casing (40), a lower space (45) is formed below the drain pan (44), and an upper space (46) is formed above the drain pan (44). The lower space (45) and the upper space (46) communicate with each other via the intermediate space (47). The inflow side of the lower space (45) communicates with the air flow path of the suction grill (42), and the outflow side of the upper space (46) communicates with the air flow path of the blowout grill (43). That is, in the casing (40), room air flows in the order of the suction grill (42), the lower space (45), the intermediate space (47), the upper space (46), and the blowout grill (43).

〔室内ファン〕
室内ファン(33)は、下部空間(45)に配置されている。室内ファン(33)は、室内空気を搬送する、例えばシロッコファンで構成される。
[Indoor fan]
The indoor fan (33) is disposed in the lower space (45). The indoor fan (33) is configured by, for example, a sirocco fan that conveys indoor air.

〔室内配管〕
室内配管(32)は、ケーシング(40)の内部に収容されている。室内配管(32)は、室内熱交換器(31)と液配管(34)とガス配管(35)とを有している。
[Indoor piping]
The indoor pipe (32) is accommodated in the casing (40). The indoor pipe (32) has an indoor heat exchanger (31), a liquid pipe (34), and a gas pipe (35).

室内熱交換器(31)は、上部空間(46)において、ドレンパン(44)の上側に配置されている。室内熱交換器(31)は、その前面側が斜め上方を向くように傾斜して配置される(図4を参照)。室内熱交換器(31)のガス側端部には、ガス配管(35)が繋がり、室内熱交換器(31)の液側端部には、液配管(34)が繋がっている。液配管(34)及びガス配管(35)は、上部空間(46)と下部空間(45)とに亘って配設されている。     The indoor heat exchanger (31) is disposed above the drain pan (44) in the upper space (46). The indoor heat exchanger (31) is disposed so as to be inclined so that its front side faces obliquely upward (see FIG. 4). A gas pipe (35) is connected to the gas side end of the indoor heat exchanger (31), and a liquid pipe (34) is connected to the liquid side end of the indoor heat exchanger (31). The liquid pipe (34) and the gas pipe (35) are disposed over the upper space (46) and the lower space (45).

図5に示すように、液配管(34)の周囲には筒状の上部液側断熱部材(34a)が設けられ、ガス配管(35)の周囲には、上部ガス側断熱部材(35a)が設けられる。     As shown in FIG. 5, a cylindrical upper liquid side heat insulating member (34a) is provided around the liquid pipe (34), and an upper gas side heat insulating member (35a) is provided around the gas pipe (35). Provided.

〔連絡配管〕
ケーシング(40)の下部空間(45)には、上述した液側連絡配管(12)及びガス側連絡配管(13)の一部が配設されている。各連絡配管(12,13)は、ケーシング(40)の下部を貫通し、ケーシング(40)の側面に沿って上方へ延びている。また、液側連絡配管(12)の周囲には、上述した液側断熱部材(12a)が設けられ、ガス側連絡配管(13)の周囲には、上述したガス側断熱部材(13a)が設けられる。
[Communication piping]
In the lower space (45) of the casing (40), a part of the liquid side connecting pipe (12) and the gas side connecting pipe (13) are arranged. Each connecting pipe (12, 13) penetrates the lower part of the casing (40) and extends upward along the side surface of the casing (40). Further, the liquid side heat insulating member (12a) is provided around the liquid side connecting pipe (12), and the gas side heat insulating member (13a) is provided around the gas side connecting pipe (13). It is done.

〔継手部材〕
図5に示すように、本実施形態の下部空間(45)には、液側継手部材(51)とガス側継手部材(52)とが配置されている。液側継手部材(51)は、液配管(34)の端部(下端)と液側連絡配管(12)の端部(上端)とを連結している。ガス側継手部材(52)は、ガス配管(35)の端部(下端)とガス側連絡配管(13)の端部(上端)とを連結している。
(Fitting member)
As shown in FIG. 5, the liquid side joint member (51) and the gas side joint member (52) are arrange | positioned in the lower space (45) of this embodiment. The liquid side joint member (51) connects the end (lower end) of the liquid pipe (34) and the end (upper end) of the liquid side connecting pipe (12). The gas side joint member (52) connects the end (lower end) of the gas pipe (35) and the end (upper end) of the gas side connecting pipe (13).

各継手部材(2)は、ケーシング(40)の前面パネル(41)を取り外した状態において、ケーシング(40)の外部下側寄りに露出される位置にある。これにより、各継手部材(51,52)による配管の連結作業を容易に行うことができる。     Each joint member (2) is in a position exposed to the outside lower side of the casing (40) in a state where the front panel (41) of the casing (40) is removed. Thereby, the connection operation | work of piping by each joint member (51, 52) can be performed easily.

各継手部材(51,52)は、フレア継手で構成される。具体的に、液側継手部材(51)は、液配管(34)の端部に接続される本体部(51a)と、液側連絡配管(12)の端部に接続されるナット部(51b)とを有している。ガス側継手部材(52)は、ガス配管(35)の端部に接続される本体部(52a)と、液側連絡配管(12)の端部に接続されるナット部(52b)とを有している。各ナット部(51b,52b)を各本体部(51a,52a)に締め付けることで、各配管(34,35)と各連絡配管(12,13)とが接続される。     Each joint member (51, 52) is formed of a flare joint. Specifically, the liquid side joint member (51) includes a main body (51a) connected to the end of the liquid pipe (34) and a nut (51b) connected to the end of the liquid side connecting pipe (12). ). The gas side joint member (52) has a main body (52a) connected to the end of the gas pipe (35) and a nut (52b) connected to the end of the liquid side connecting pipe (12). doing. By tightening each nut part (51b, 52b) to each main body part (51a, 52a), each pipe (34, 35) and each connecting pipe (12, 13) are connected.

〔冷媒排出機構〕
本実施形態に係る冷媒排出機構(60)は、各継手部材(51,52)から漏洩した冷媒を室外へ排出するように構成されている。
[Refrigerant discharge mechanism]
The refrigerant discharge mechanism (60) according to the present embodiment is configured to discharge the refrigerant leaked from the joint members (51, 52) to the outside of the room.

〈冷媒排出機構の詳細な構成〉
冷媒排出機構(60)の詳細な構成について、図5〜図7を参照しながら詳細に説明する。
<Detailed configuration of refrigerant discharge mechanism>
The detailed configuration of the refrigerant discharge mechanism (60) will be described in detail with reference to FIGS.

冷媒排出機構(60)は、液側カバー部材(61)と、液側隙間流路(71)と、ガス側カバー部材(81)と、ガス側隙間流路(91)とを有している。液側カバー部材(61)及び液側隙間流路(71)は、液側継手部材(51)に対応し、ガス側カバー部材(81)とガス側隙間流路(91)は、ガス側継手部材(52)に対応している。     The refrigerant discharge mechanism (60) includes a liquid side cover member (61), a liquid side clearance channel (71), a gas side cover member (81), and a gas side clearance channel (91). . The liquid side cover member (61) and the liquid side clearance channel (71) correspond to the liquid side joint member (51), and the gas side cover member (81) and the gas side clearance channel (91) correspond to the gas side joint. Corresponds to member (52).

〔液側カバー部材及び液側隙間流路〕
液側カバー部材(61)は、略筒状に構成され、液側継手部材(51)を収容する液側収容空間(62)を形成するように構成される。液側カバー部材(61)は、蛇腹状の筒壁部(63)と、該筒壁部(63)の下端に形成される筒状の下側固定部(64)と、該筒壁部(63)の上端に形成される筒状の上側固定部(65)とを有している。
[Liquid side cover member and liquid side clearance channel]
The liquid side cover member (61) is formed in a substantially cylindrical shape, and is configured to form a liquid side accommodation space (62) for accommodating the liquid side joint member (51). The liquid side cover member (61) includes a bellows-shaped cylindrical wall portion (63), a cylindrical lower fixing portion (64) formed at the lower end of the cylindrical wall portion (63), and the cylindrical wall portion ( 63) and a cylindrical upper fixing part (65) formed at the upper end of the upper part.

図6に示すように、液側カバー部材(61)には、筒壁部(63)の下部内周面に連結する内壁部(66)が形成される。内壁部(66)は、円板状の環状壁部(66a)と、該環状壁部(66a)の内周縁部から下方に突出する筒状の縦壁部(66b)とで構成される。     As shown in FIG. 6, the liquid side cover member (61) is formed with an inner wall portion (66) connected to the lower inner peripheral surface of the cylindrical wall portion (63). The inner wall portion (66) includes a disc-shaped annular wall portion (66a) and a cylindrical vertical wall portion (66b) protruding downward from the inner peripheral edge portion of the annular wall portion (66a).

液側カバー部材(61)では、下側固定部(64)と縦壁部(66b)との間に、液側断熱部材(12a)の上端が挿通される筒状の空間が形成される。この空間に液側断熱部材(12a)を差し込んだ状態で、下側固定部(64)及び縦壁部(66b)を液側断熱部材(12a)に固定する(例えば接着、溶着、締め付け等)。これにより、液側カバー部材(61)の下端部が液側断熱部材(12a)に固定される。     In the liquid side cover member (61), a cylindrical space through which the upper end of the liquid side heat insulating member (12a) is inserted is formed between the lower fixing portion (64) and the vertical wall portion (66b). With the liquid side heat insulating member (12a) inserted in this space, the lower fixing portion (64) and the vertical wall portion (66b) are fixed to the liquid side heat insulating member (12a) (for example, adhesion, welding, tightening, etc.) . Thereby, the lower end part of the liquid side cover member (61) is fixed to the liquid side heat insulating member (12a).

液側カバー部材(61)では、筒壁部(63)が筒軸方向に伸縮可能に構成されている。筒壁部(63)が液側連絡配管(12)側に収縮した状態では、図6(A)に示すように、液側継手部材(51)が液側カバー部材(61)の外部へ露出される状態となる。これにより、液側継手部材(51)の本体部(51a)及びナット部(51b)を容易に連結することができる。     In the liquid side cover member (61), the cylinder wall part (63) is configured to be extendable and contractible in the cylinder axis direction. When the cylindrical wall part (63) is contracted to the liquid side connecting pipe (12) side, as shown in FIG. 6 (A), the liquid side joint member (51) is exposed to the outside of the liquid side cover member (61). It will be in a state to be. Thereby, the main-body part (51a) and nut part (51b) of a liquid side coupling member (51) can be connected easily.

液側継手部材(51)を連結した後には、図6(B)に示すように、液側カバー部材(61)の筒壁部(63)をガス側連絡配管(13)側に伸張させる。そして、液側カバー部材(61)の上側固定部(65)を上部液側断熱部材(34a)の周囲に固定する。液側カバー部材(61)の上側固定部(65)は、例えば環状の結束バンド等で上部液側断熱部材(34a)に締め付けて固定してもよいし、接着、溶着等により固定してもよい。     After connecting the liquid side joint member (51), as shown in FIG. 6B, the cylindrical wall portion (63) of the liquid side cover member (61) is extended to the gas side connecting pipe (13) side. Then, the upper fixing part (65) of the liquid side cover member (61) is fixed around the upper liquid side heat insulating member (34a). The upper fixing portion (65) of the liquid side cover member (61) may be fixed by being fastened to the upper liquid side heat insulating member (34a) with, for example, an annular binding band, or may be fixed by adhesion, welding, or the like. Good.

以上のようにして、液側カバー部材(61)の下側固定部(64)を液側断熱部材(12a)に固定し、液側カバー部材(61)の上側固定部(65)を上部液側断熱部材(34a)に固定することで、液側カバー部材(61)の内側に液側収容空間(62)を形成することができる。     As described above, the lower fixing part (64) of the liquid side cover member (61) is fixed to the liquid side heat insulating member (12a), and the upper fixing part (65) of the liquid side cover member (61) is fixed to the upper liquid. By fixing to the side heat insulating member (34a), the liquid side accommodation space (62) can be formed inside the liquid side cover member (61).

図6に示すように、液側断熱部材(12a)と液側連絡配管(12)との間には、筒状の僅かな隙間(液側隙間流路(71))が形成される。この液側隙間流路(71)は、室外まで配設される液側連絡配管(12)に沿うように室外へ続いている。つまり、液側隙間流路(71)は、液側収容空間(62)と室外とを連通する液側の冷媒案内流路を構成する。     As shown in FIG. 6, a small cylindrical gap (liquid-side gap flow path (71)) is formed between the liquid-side heat insulating member (12a) and the liquid-side connecting pipe (12). The liquid side clearance channel (71) continues to the outside along the liquid side connecting pipe (12) disposed to the outside. That is, the liquid side clearance channel (71) constitutes a liquid side refrigerant guide channel that allows the liquid side accommodation space (62) to communicate with the outside.

〔ガス側カバー部材及びガス側隙間流路〕
ガス側カバー部材(81)は、略筒状に構成され、ガス側継手部材(52)を収容するガス側収容空間(82)を形成するように構成される。液側カバー部材(61)は、蛇腹状の筒壁部(83)と、該筒壁部(83)の下端に形成される筒状の下側固定部(84)と、該筒壁部(83)の上端に形成される筒状の上側固定部(85)とを有している。
[Gas side cover member and gas side clearance channel]
The gas side cover member (81) is configured in a substantially cylindrical shape, and is configured to form a gas side accommodation space (82) that accommodates the gas side joint member (52). The liquid side cover member (61) includes a bellows-shaped cylindrical wall portion (83), a cylindrical lower fixing portion (84) formed at the lower end of the cylindrical wall portion (83), and the cylindrical wall portion ( 83) and a cylindrical upper fixing portion (85) formed at the upper end of the upper end of 83).

図7に示すように、ガス側カバー部材(81)には、筒壁部(83)の下部内周面に連結する内壁部(86)が形成される。内壁部(86)は、円板状の環状壁部(86a)と、該環状壁部(86a)の内周縁部から下方に突出する筒状の縦壁部(86b)とで構成される。     As shown in FIG. 7, the gas side cover member (81) is formed with an inner wall portion (86) connected to the lower inner peripheral surface of the cylindrical wall portion (83). The inner wall portion (86) includes a disk-shaped annular wall portion (86a) and a cylindrical vertical wall portion (86b) protruding downward from the inner peripheral edge portion of the annular wall portion (86a).

ガス側カバー部材(81)では、下側固定部(84)と縦壁部(86b)との間に、ガス側断熱部材(13a)の上端が挿通される筒状の空間が形成される。この空間にガス側断熱部材(13a)を差し込んだ状態で、下側固定部(84)及び縦壁部(86b)をガス側断熱部材(13a)に固定する(例えば接着、溶着、締め付け等)。これにより、ガス側カバー部材(81)の下端部がガス側断熱部材(13a)に固定される。     In the gas side cover member (81), a cylindrical space into which the upper end of the gas side heat insulating member (13a) is inserted is formed between the lower fixing portion (84) and the vertical wall portion (86b). With the gas side heat insulating member (13a) inserted into this space, the lower fixing portion (84) and the vertical wall portion (86b) are fixed to the gas side heat insulating member (13a) (for example, bonding, welding, tightening, etc.) . Thereby, the lower end part of a gas side cover member (81) is fixed to a gas side heat insulation member (13a).

ガス側カバー部材(81)では、筒壁部(83)が筒軸方向に伸縮可能に構成されている。筒壁部(83)がガス側連絡配管(13)側に収縮した状態では、図7(A)に示すように、ガス側継手部材(52)がガス側カバー部材(81)の外部へ露出される状態となる。これにより、ガス側継手部材(52)の本体部(52a)及びナット部(52b)を容易に連結することができる。     In the gas side cover member (81), the cylinder wall part (83) is configured to be extendable and contractible in the cylinder axis direction. When the cylindrical wall portion (83) is contracted to the gas side connecting pipe (13) side, the gas side joint member (52) is exposed to the outside of the gas side cover member (81) as shown in FIG. It will be in a state to be. Thereby, the main-body part (52a) and nut part (52b) of a gas side coupling member (52) can be connected easily.

ガス側継手部材(52)を連結した後には、図7(B)に示すように、ガス側カバー部材(81)の筒壁部(83)をガス側連絡配管(13)側に伸張させる。そして、ガス側カバー部材(81)の上側固定部(85)を上部ガス側断熱部材(35a)の周囲に固定する。ガス側カバー部材(81)の上側固定部(85)は、例えば環状の結束バンド等で上部ガス側断熱部材(35a)に締め付けて固定してもよいし、接着、溶着等により固定してもよい。     After connecting the gas side joint member (52), as shown in FIG. 7 (B), the cylindrical wall portion (83) of the gas side cover member (81) is extended toward the gas side connecting pipe (13). Then, the upper fixing part (85) of the gas side cover member (81) is fixed around the upper gas side heat insulating member (35a). The upper fixing portion (85) of the gas side cover member (81) may be fixed by being fastened to the upper gas side heat insulating member (35a) with an annular binding band or the like, or may be fixed by adhesion, welding or the like. Good.

以上のようにして、ガス側カバー部材(81)の下側固定部(84)をガス側断熱部材(13a)に固定し、上側固定部(85)を上部ガス側断熱部材(35a)に固定することで、ガス側カバー部材(81)の内側にガス側収容空間(82)を形成することができる。     As described above, the lower fixing portion (84) of the gas side cover member (81) is fixed to the gas side heat insulating member (13a), and the upper fixing portion (85) is fixed to the upper gas side heat insulating member (35a). Thus, the gas side accommodation space (82) can be formed inside the gas side cover member (81).

図7に示すように、ガス側断熱部材(13a)とガス側連絡配管(13)との間には、筒状の僅かな隙間(ガス側隙間流路(91))が形成される。このガス側隙間流路(91)は、室外まで配設されるガス側連絡配管(13)に沿うように室外へ続いている。つまり、ガス側隙間流路(91)は、ガス側収容空間(82)と室外とを連通する液側の冷媒案内流路を構成する。     As shown in FIG. 7, a small cylindrical gap (gas-side gap channel (91)) is formed between the gas-side heat insulating member (13a) and the gas-side connecting pipe (13). The gas side clearance channel (91) continues to the outside along the gas side connecting pipe (13) disposed to the outside. That is, the gas side clearance channel (91) constitutes a liquid side refrigerant guide channel that communicates the gas side accommodation space (82) with the outside.

−運転動作−
空気調和機(10)の運転動作について図1を参照しながら説明する。
-Driving action-
The operation of the air conditioner (10) will be described with reference to FIG.

〈冷房運転〉
冷房運転では、四方切換弁(24)が第1状態(図1の破線で示す状態)となり、圧縮機(21)、室外ファン(25)、室内ファン(33)が作動する。室外膨張弁(23)は所定開度に調節される。冷房運転では、圧縮機(21)で圧縮された冷媒が室外熱交換器(22)で凝縮し、室外膨張弁(23)で減圧される。減圧された冷媒は、液側連絡配管(12)、液配管(34)を順に流れ、室内熱交換器(31)を流れる。
<Cooling operation>
In the cooling operation, the four-way switching valve (24) is in the first state (the state indicated by the broken line in FIG. 1), and the compressor (21), the outdoor fan (25), and the indoor fan (33) are operated. The outdoor expansion valve (23) is adjusted to a predetermined opening. In the cooling operation, the refrigerant compressed by the compressor (21) is condensed by the outdoor heat exchanger (22), and the pressure is reduced by the outdoor expansion valve (23). The decompressed refrigerant flows through the liquid side connecting pipe (12) and the liquid pipe (34) in this order, and then flows through the indoor heat exchanger (31).

室内ユニット(30)では、室内空気が、吸込グリル(42)、下部空間(45)、中間空間(47)、上部空間(46)を順に流れ、室内熱交換器(31)を通過する。室内熱交換器(31)では、冷媒が室内空気から吸熱して蒸発する。この結果、室内空気が冷却される。室内熱交換器(31)で冷却された空気は、吹出グリル(43)を通じて室内へ供給される。     In the indoor unit (30), room air flows in order through the suction grille (42), the lower space (45), the intermediate space (47), and the upper space (46), and passes through the indoor heat exchanger (31). In the indoor heat exchanger (31), the refrigerant absorbs heat from the indoor air and evaporates. As a result, the room air is cooled. The air cooled by the indoor heat exchanger (31) is supplied into the room through the blowout grill (43).

室内熱交換器(31)で蒸発した冷媒は、ガス配管(35)、ガス側連絡配管(13)を順に流れ、圧縮機(21)に吸入され、再び圧縮される。     The refrigerant evaporated in the indoor heat exchanger (31) sequentially flows through the gas pipe (35) and the gas side connecting pipe (13), is sucked into the compressor (21), and is compressed again.

〈暖房運転〉
暖房運転では、四方切換弁(24)が第2状態(図1の実線で示す状態)となり、圧縮機(21)、室外ファン(25)、室内ファン(33)が作動する。室外膨張弁(23)は所定開度に調節される。暖房運転では、圧縮機(21)で圧縮された冷媒が、ガス側連絡配管(12)、ガス配管(35)を順に流れ、室内熱交換器(31)を流れる。
<Heating operation>
In the heating operation, the four-way selector valve (24) is in the second state (the state indicated by the solid line in FIG. 1), and the compressor (21), the outdoor fan (25), and the indoor fan (33) are operated. The outdoor expansion valve (23) is adjusted to a predetermined opening. In the heating operation, the refrigerant compressed by the compressor (21) sequentially flows through the gas side communication pipe (12) and the gas pipe (35), and then flows through the indoor heat exchanger (31).

室内ユニット(30)では、室内空気が、吸込グリル(42)、下部空間(45)、中間空間(47)、上部空間(46)を順に流れ、室内熱交換器(31)を通過する。室内熱交換器(31)では、冷媒が室内空気へ放熱して凝縮する。この結果、室内空気が加熱される。室内熱交換器(31)で加熱された空気は、吹出グリル(43)を通じて室内へ供給される。     In the indoor unit (30), room air flows in order through the suction grille (42), the lower space (45), the intermediate space (47), and the upper space (46), and passes through the indoor heat exchanger (31). In the indoor heat exchanger (31), the refrigerant dissipates heat to the indoor air and condenses. As a result, the room air is heated. The air heated by the indoor heat exchanger (31) is supplied into the room through the blowout grill (43).

室内熱交換器(31)で凝縮した冷媒は、液配管(34)、液側連絡配管(12)を順に流れ、室外膨張弁(23)で減圧される。減圧された冷媒は、室外熱交換器(22)で蒸発した後、圧縮機(21)に吸入され、再び圧縮される。     The refrigerant condensed in the indoor heat exchanger (31) flows in order through the liquid pipe (34) and the liquid side connecting pipe (12), and is decompressed by the outdoor expansion valve (23). The decompressed refrigerant evaporates in the outdoor heat exchanger (22), and then is sucked into the compressor (21) and compressed again.

〈冷媒排出機構の作用及び効果〉
上述したように、本実施形態の室内ユニット(30)では、ケーシング(40)の下部空間(45)に液側継手部材(51)及びガス側継手部材(52)が配置される。例えば空気調和機(10)の停止時において、各継手部材(51,52)から冷媒が漏洩し、この冷媒がケーシング(40)の底部に溜まり込んでいくと、この冷媒が濃縮される。R32は可燃性の冷媒であるため、このように濃度が高くなった冷媒がケーシング(40)の外部に漏れて何らかの着火源に曝されると、冷媒が発火してしまう虞がある。そこで、本実施形態の室内ユニット(30)には、ケーシング(40)の底部での冷媒の濃縮を防止するために、冷媒排出機構(60)を設けている。
<Operation and effect of refrigerant discharge mechanism>
As described above, in the indoor unit (30) of the present embodiment, the liquid side joint member (51) and the gas side joint member (52) are disposed in the lower space (45) of the casing (40). For example, when the air conditioner (10) is stopped, when the refrigerant leaks from the joint members (51, 52) and accumulates in the bottom of the casing (40), the refrigerant is concentrated. Since R32 is a flammable refrigerant, if the refrigerant having such a high concentration leaks outside the casing (40) and is exposed to some ignition source, the refrigerant may ignite. Therefore, the indoor unit (30) of the present embodiment is provided with a refrigerant discharge mechanism (60) in order to prevent the refrigerant from concentrating at the bottom of the casing (40).

具体的に、空気調和機(10)の停止時において、例えば液側継手部材(51)から冷媒が漏洩したとする。漏洩した冷媒は、液側カバー部材(61)の液側収容空間(62)に流出して貯留される。冷媒の漏洩に起因して液側収容空間(62)の内圧が上昇すると、液側収容空間(62)の冷媒は液側隙間流路(71)に流入し、液側連絡配管(12)に沿うように室外へと導かれる。これにより、液側継手部材(51)から漏洩した冷媒を速やかに室外へ排出でき、ケーシング(40)の底部に高濃度の冷媒が溜まり込むことを未然に回避できる。     Specifically, it is assumed that, for example, the refrigerant leaks from the liquid side joint member (51) when the air conditioner (10) is stopped. The leaked refrigerant flows out and is stored in the liquid side accommodation space (62) of the liquid side cover member (61). When the internal pressure of the liquid side accommodation space (62) rises due to the leakage of the refrigerant, the refrigerant in the liquid side accommodation space (62) flows into the liquid side clearance channel (71) and enters the liquid side communication pipe (12). It is led to the outside along the way. As a result, the refrigerant leaking from the liquid side joint member (51) can be quickly discharged to the outside of the room, and it is possible to avoid the high concentration refrigerant from accumulating at the bottom of the casing (40).

同様に、空気調和機(10)の停止時において、例えばガス側継手部材(52)から冷媒が漏洩したとする。漏洩した冷媒は、ガス側カバー部材(81)のガス側収容空間(82)に流出して貯留される。冷媒の漏洩に起因してガス側収容空間(82)の内圧が上昇すると、ガス側収容空間(82)の冷媒はガス側隙間流路(91)に流入し、ガス側連絡配管(13)に沿うように室外へと導かれる。これにより、ガス側継手部材(52)から漏洩した冷媒を速やかに室外へ排出でき、ケーシング(40)の底部に高濃度の冷媒が溜まり込むことを未然に回避できる。     Similarly, it is assumed that, for example, the refrigerant leaks from the gas side joint member (52) when the air conditioner (10) is stopped. The leaked refrigerant flows out and is stored in the gas-side accommodation space (82) of the gas-side cover member (81). When the internal pressure of the gas-side storage space (82) rises due to refrigerant leakage, the refrigerant in the gas-side storage space (82) flows into the gas-side clearance channel (91) and enters the gas-side connecting pipe (13). It is led to the outside along the way. As a result, the refrigerant leaking from the gas side joint member (52) can be quickly discharged to the outside of the room, and the high concentration refrigerant can be prevented from being accumulated at the bottom of the casing (40).

各カバー部材(61,81)では、該カバー部材(61,81)の下部に各隙間流路(71,91)が繋がっている。このため、例えば液側収容空間(62)に漏洩した液冷媒は、その自重によっても液側隙間流路(71)に流入し易くなる。また、例えばガス側収容空間(82)に漏洩したガス冷媒が凝縮して液冷媒となったとしても、この液冷媒は、その自重によってもガス側隙間流路(91)に流入し易くなる。加えて、本実施形態の冷媒(R32)は、ガス状態においても空気より比重が大きい。このため、ガス側収容空間(82)にR32からなるガス冷媒が漏洩した場合にも、このガス冷媒はガス側隙間流路(91)を通じて下方へ流れ易くなる。従って、本実施形態では、各収容空間(62,82)に流出した液冷媒やガス冷媒を速やかに室外へ排出できる。     In each cover member (61, 81), each clearance channel (71, 91) is connected to the lower part of the cover member (61, 81). For this reason, for example, the liquid refrigerant leaked into the liquid side accommodation space (62) easily flows into the liquid side gap flow path (71) due to its own weight. For example, even if the gas refrigerant leaked into the gas side accommodation space (82) condenses into a liquid refrigerant, the liquid refrigerant easily flows into the gas side gap channel (91) due to its own weight. In addition, the refrigerant (R32) of the present embodiment has a higher specific gravity than air even in a gas state. For this reason, even when the gas refrigerant composed of R32 leaks into the gas-side accommodation space (82), the gas refrigerant easily flows downward through the gas-side clearance channel (91). Therefore, in this embodiment, the liquid refrigerant and gas refrigerant which flowed out to each accommodation space (62, 82) can be quickly discharged outside the room.

また、本実施形態では、液側継手部材(51)を収容する液側カバー部材(61)と、ガス側継手部材(52)を収容するガス側カバー部材(81)とを1つずつ設けている。このため、液配管(34)や液側連絡配管(12)を流れる液冷媒と、ガス配管(35)やガス側連絡配管(13)を流れるガス冷媒とが互いに熱交換してしまうことを確実に防止できる。     Moreover, in this embodiment, the liquid side cover member (61) which accommodates the liquid side joint member (51) and the gas side cover member (81) which accommodates the gas side joint member (52) are provided one by one. Yes. Therefore, it is ensured that the liquid refrigerant flowing through the liquid pipe (34) and the liquid side connecting pipe (12) and the gas refrigerant flowing through the gas pipe (35) and the gas side connecting pipe (13) exchange heat with each other. Can be prevented.

また、各継手部材(51,52)に対応してそれぞれカバー部材(61,81)を設けることで、各収容空間(62,82)の容積を比較的小さくできる。これにより、収容空間(62,82)の内圧の上昇を促すことができ、収容空間(62,82)の冷媒を確実に上部空間(46)へ導くことができる。     In addition, by providing the cover members (61, 81) corresponding to the joint members (51, 52), the volume of the storage spaces (62, 82) can be made relatively small. Thereby, an increase in the internal pressure of the accommodation space (62, 82) can be promoted, and the refrigerant in the accommodation space (62, 82) can be reliably guided to the upper space (46).

《実施形態の変形例》
上記実施形態については、以下のような変形例の構成としてもよい。
<< Modification of Embodiment >>
About the said embodiment, it is good also as a structure of the following modifications.

図8に示す変形例は、上記実施形態と冷媒排出機構(60)の構成が異なっている。変形例の冷媒排出機構(60)は、1つのカバー部材(95)と1本の冷媒案内管(96)とを有している。カバー部材(95)は、縦長の中空箱形に形成される。カバー部材(95)は、液側継手部材(51)とガス側継手部材(52)との双方を収容する1つの収容空間(97)を有している。     The modification shown in FIG. 8 differs from the above embodiment in the configuration of the refrigerant discharge mechanism (60). The refrigerant discharge mechanism (60) of the modified example has one cover member (95) and one refrigerant guide tube (96). The cover member (95) is formed in a vertically long hollow box shape. The cover member (95) has one accommodation space (97) that accommodates both the liquid side joint member (51) and the gas side joint member (52).

冷媒案内管(96)は、収容空間(97)とドレンパン(44)に接続する排水管(44c)とを連通させる冷媒案内流路を構成している。冷媒案内管(96)の流入端(96a)は、カバー部材(95)の底壁部(95a)に接続し、収容空間(97)の内部に開口している。冷媒案内管(96)の流出端(96b)(接続部)は、排水管(44c)に接続している。図8に示すように、冷媒案内管(96)の流出端(96b)の下端の高さh1は、冷媒案内管(96)の流入端(96a)の高さh2よりも低い位置にある。     The refrigerant guide pipe (96) constitutes a refrigerant guide flow path that allows the accommodation space (97) and the drain pipe (44c) connected to the drain pan (44) to communicate with each other. The inflow end (96a) of the refrigerant guide tube (96) is connected to the bottom wall portion (95a) of the cover member (95) and opens into the accommodation space (97). The outflow end (96b) (connection portion) of the refrigerant guide pipe (96) is connected to the drain pipe (44c). As shown in FIG. 8, the height h1 of the lower end of the outflow end (96b) of the refrigerant guide tube (96) is lower than the height h2 of the inflow end (96a) of the refrigerant guide tube (96).

この変形例では、各継手部材(51,52)から漏洩した冷媒が、1つの収容空間(97)に貯留される。この収容空間(97)の内圧が上昇すると、冷媒は冷媒案内管(96)を通じて排水管(44c)へ導かれる。排水管(44c)に導かれた冷媒は、最終的に室外へ排出される。この結果、変形例においても、各継手部材(51,52)から漏洩した冷媒がケーシング(40)の底部に濃縮されて溜まってしまうことを回避でき、ひいては冷媒の発火を確実に回避できる。     In this modification, the refrigerant leaked from each joint member (51, 52) is stored in one accommodation space (97). When the internal pressure of the housing space (97) increases, the refrigerant is guided to the drain pipe (44c) through the refrigerant guide pipe (96). The refrigerant led to the drain pipe (44c) is finally discharged outside the room. As a result, also in the modified example, it is possible to avoid that the refrigerant leaked from each joint member (51, 52) is concentrated and accumulated at the bottom of the casing (40), and thus ignition of the refrigerant can be avoided reliably.

《その他の実施形態》
上記実施形態及び変形例については、以下の構成としてもよい。
<< Other Embodiments >>
About the said embodiment and modification, it is good also as the following structures.

上記変形例のカバー部材(95)を断熱性材料で構成してもよい。これにより、カバー部材(95)が各配管(12,13,34,35)の周囲を覆う断熱材を兼用し、各配管(12,13,34,35)を流れる冷媒の熱ロスを低減できる。     You may comprise the cover member (95) of the said modification with a heat insulating material. Thereby, the cover member (95) also serves as a heat insulating material that covers the periphery of each pipe (12, 13, 34, 35), and heat loss of the refrigerant flowing through each pipe (12, 13, 34, 35) can be reduced. .

上記変形例のカバー部材(95)において、上記実施形態に記載のような蛇腹構造の筒壁部(63,83)を採用してもよい。これにより、各継手部材(51,52)をカバー部材(95)の外部へ露出させ、各継手部材(51,52)の連結作業や取外し作業を容易に行うことができる。     In the cover member (95) of the modified example, a cylindrical wall portion (63, 83) having a bellows structure as described in the above embodiment may be employed. Thereby, each joint member (51, 52) can be exposed to the exterior of a cover member (95), and the connection operation | work and removal operation | work of each joint member (51, 52) can be performed easily.

上記変形例の冷媒排出機構(60)は、1つのカバー部材(95)の収容空間(97)に液側継手部材(51)とガス側継手部材(52)との双方を収容し、収容空間(97)を1本の冷媒案内管(96)を介して排水管(44c)と連通させるように構成されている(図8を参照)。しかしながら、冷媒排出機構(60)は、液側のカバー部材の収容空間に液側継手部材(51)を収容し、この液側のカバー部材の収容空間を冷媒案内管を介して排水管(44c)と連通させ、且つガス側のカバー部材の収容空間にガス側継手部材(52)を収容し、このガス側のカバー部材の収容空間を冷媒案内管を介して排水管(44c)に連通させるように構成されていてもよい。     The refrigerant discharge mechanism (60) of the modified example accommodates both the liquid side joint member (51) and the gas side joint member (52) in the accommodation space (97) of one cover member (95). (97) is configured to communicate with the drain pipe (44c) through one refrigerant guide pipe (96) (see FIG. 8). However, the refrigerant discharge mechanism (60) stores the liquid side joint member (51) in the storage space of the liquid side cover member, and the storage space of the liquid side cover member passes through the refrigerant guide pipe to the drain pipe (44c). ) And the gas side joint member (52) is accommodated in the accommodating space of the gas side cover member, and the accommodating space of the gas side cover member is communicated with the drain pipe (44c) via the refrigerant guide tube. It may be configured as follows.

また、冷媒回路(11)に充填される冷媒は、R32に限られず、可燃性の冷媒であれば他の冷媒を用いるようにしてもよい。     Moreover, the refrigerant | coolant with which a refrigerant circuit (11) is filled is not restricted to R32, As long as it is a combustible refrigerant | coolant, you may make it use another refrigerant | coolant.

上記実施形態では、下部空間(45)において、継手部材(51,52)が室内ファン(33)の前側に配置されている。しかしながら、継手部材(51,52)を室内ファン(33)の後側(裏側)に配置してもよい。また、継手部材(51,52)を中間空間(47)や上部空間(46)に配置してもよい。     In the above embodiment, the joint members (51, 52) are arranged on the front side of the indoor fan (33) in the lower space (45). However, the joint members (51, 52) may be disposed on the rear side (back side) of the indoor fan (33). Further, the joint members (51, 52) may be arranged in the intermediate space (47) or the upper space (46).

以上説明したように、本発明は、空気調和機の床置式室内ユニットについて有用である。     As described above, the present invention is useful for a floor-standing indoor unit of an air conditioner.

10 空気調和機
12 液側連絡配管(連絡配管)
12a 液側断熱部材(断熱部材)
13 ガス側連絡配管(連絡配管)
13a ガス側断熱部材(断熱部材)
30 室内ユニット(床置式室内ユニット)
31 室内熱交換器(熱交換器)
32 室内配管
33 室内ファン(ファン)
40 ケーシング
44 ドレンパン
51 液側継手部材(継手部材)
52 ガス側継手部材(継手部材)
60 冷媒排出機構
61 液側カバー部材(カバー部材)
62 液側収容空間
71 液側隙間流路
81 ガス側カバー部材(カバー部材)
82 ガス側収容空間
91 ガス側隙間流路
95 カバー部材
96 冷媒案内管(冷媒案内流路)
96a 流入端
96b 流出端(接続部)
97 収容空間
10 Air conditioner
12 Liquid side communication piping (Communication piping)
12a Liquid-side heat insulation member (heat insulation member)
13 Gas side communication piping (connection piping)
13a Gas side heat insulation member (heat insulation member)
30 indoor unit (floor indoor unit)
31 Indoor heat exchanger (heat exchanger)
32 Indoor piping
33 Indoor fans (fans)
40 casing
44 Drainpan
51 Liquid side joint members (joint members)
52 Gas side joint members (joint members)
60 Refrigerant discharge mechanism
61 Liquid side cover member (cover member)
62 Liquid side storage space
71 Liquid side clearance channel
81 Gas side cover member (cover member)
82 Gas side containment space
91 Gas side clearance channel
95 Cover material
96 Refrigerant guide tube (refrigerant guide channel)
96a Inlet end
96b Outflow end (connection)
97 Containment space

Claims (7)

空気調和装置の床置式室内ユニットであって、
ケーシング(40)と、
上記ケーシング(40)の内部に収容され、可燃性の冷媒が流通する熱交換器(31)を有する室内配管(32)と、
上記ケーシング(40)の内部に収容され、空気を搬送するファン(33)と、
上記ケーシング(40)の内部に収容され、上記室内配管(32)の端部と、室外から配設される連絡配管(12,13)とを接続する少なくとも1つの継手部材(51,52)と、
上記継手部材(51,52)から漏洩した冷媒を室外へ排出するための冷媒排出機構(60)とを備え
上記冷媒排出機構(60)は、上記継手部材(51,52)が収容される収容空間(62,82,97)を形成するカバー部材(61,81,95)と、上記カバー部材(61,81,95)の収容空間(62,82,97)と室外とを連通させる冷媒案内流路(71,91,96)とを有し、
上記熱交換器(31)の下側に設置されるドレンパン(44)と、
上記ドレンパン(44)に回収された凝縮水を上記ケーシング(40)の外部へ導くための排水管(44c)とを備え、
上記冷媒案内流路(96)は、上記収容空間(97)と上記排水管(44c)とを連通させるように構成される
ことを特徴とする床置式室内ユニット。
An air conditioner floor-standing indoor unit,
A casing (40),
An indoor pipe (32) having a heat exchanger (31) accommodated in the casing (40) and through which a combustible refrigerant flows;
A fan (33) accommodated in the casing (40) and carrying air;
At least one joint member (51, 52) housed in the casing (40) and connecting an end of the indoor pipe (32) and a connecting pipe (12, 13) disposed from the outside; ,
A refrigerant discharge mechanism (60) for discharging the refrigerant leaking from the joint member (51, 52) to the outside ,
The refrigerant discharge mechanism (60) includes a cover member (61, 81, 95) that forms an accommodation space (62, 82, 97) in which the joint member (51, 52) is accommodated, and the cover member (61, 81, 95), and a refrigerant guide channel (71, 91, 96) for communicating between the storage space (62, 82, 97) and the outside,
A drain pan (44) installed under the heat exchanger (31);
A drain pipe (44c) for guiding the condensed water collected in the drain pan (44) to the outside of the casing (40);
The floor-mounted indoor unit, wherein the refrigerant guide channel (96) is configured to communicate the housing space (97) and the drain pipe (44c) .
請求項において、
上記継手部材(51,52)は、上記室内配管(32)の液側端部と液側の上記連絡配管(12)とを接続する液側継手部材(51)と、上記室内配管(32)のガス側端部とガス側の上記連絡配管(13)とを接続するガス側継手部材(52)とで構成され、
上記冷媒排出機構(60)は、上記液側継手部材(51)と上記ガス側継手部材(52)とを収容する1つの収容空間(97)を形成する1つの上記カバー部材(95)と、該カバー部材(95)の収容空間(97)と上記排水管(44c)とを連通する1つの上記冷媒案内流路(96)とを有していることを特徴とする床置式室内ユニット。
In claim 1 ,
The joint member (51, 52) includes a liquid side joint member (51) connecting the liquid side end of the indoor pipe (32) and the liquid side connecting pipe (12), and the indoor pipe (32). A gas side joint member (52) that connects the gas side end of the gas and the communication pipe (13) on the gas side,
The refrigerant discharge mechanism (60) includes one cover member (95) that forms one storage space (97) for storing the liquid side joint member (51) and the gas side joint member (52); A floor-standing indoor unit comprising the refrigerant guide channel (96) that connects the housing space (97) of the cover member (95) and the drain pipe (44c).
請求項又はにおいて、
上記冷媒案内流路(96)は、上記排水管(44c)と接続するとともに、上記冷媒案内流路(96)の流入端(96a)よりも低い位置に配置される接続部(96b)を有している
ことを特徴とする床置式室内ユニット。
In claim 1 or 2 ,
The refrigerant guide channel (96) has a connection portion (96b) that is connected to the drain pipe (44c) and disposed at a position lower than the inflow end (96a) of the refrigerant guide channel (96). This is a floor-standing indoor unit.
空気調和装置の床置式室内ユニットであって、
ケーシング(40)と、
上記ケーシング(40)の内部に収容され、可燃性の冷媒が流通する熱交換器(31)を有する室内配管(32)と、
上記ケーシング(40)の内部に収容され、空気を搬送するファン(33)と、
上記ケーシング(40)の内部に収容され、上記室内配管(32)の端部と、室外から配設される連絡配管(12,13)とを接続する少なくとも1つの継手部材(51,52)と、
上記継手部材(51,52)から漏洩した冷媒を室外へ排出するための冷媒排出機構(60)とを備え、
上記冷媒排出機構(60)は、上記継手部材(51,52)が収容される収容空間(62,82,97)を形成するカバー部材(61,81,95)と、上記カバー部材(61,81,95)の収容空間(62,82,97)と室外とを連通させる冷媒案内流路(71,91,96)とを有し、
上記カバー部材(95)は、上記継手部材(51,52)を外部へ露出させる位置と、該継手部材(51,52)を囲むとともに前記収容空間(62,82)を形成する位置との間を筒軸方向に伸縮可能に構成される筒壁部(63,83)を有している
ことを特徴とする床置式室内ユニット。
An air conditioner floor-standing indoor unit,
A casing (40),
An indoor pipe (32) having a heat exchanger (31) accommodated in the casing (40) and through which a combustible refrigerant flows;
A fan (33) accommodated in the casing (40) and carrying air;
At least one joint member (51, 52) housed in the casing (40) and connecting an end of the indoor pipe (32) and a connecting pipe (12, 13) disposed from the outside; ,
A refrigerant discharge mechanism (60) for discharging the refrigerant leaking from the joint member (51, 52) to the outside,
The refrigerant discharge mechanism (60) includes a cover member (61, 81, 95) that forms an accommodation space (62, 82, 97) in which the joint member (51, 52) is accommodated, and the cover member (61, 81, 95), and a refrigerant guide channel (71, 91, 96) for communicating between the storage space (62, 82, 97) and the outside,
The cover member (95) is between a position where the joint member (51, 52) is exposed to the outside and a position which surrounds the joint member (51, 52 ) and forms the accommodating space (62, 82). The floor-mounted indoor unit is characterized by having a cylindrical wall portion (63, 83) configured to be extendable and contractible in the cylinder axis direction.
請求項4において、In claim 4,
上記連絡配管(12,13)の周囲を覆う筒状の断熱部材(34a,35a)を備え、A cylindrical heat insulating member (34a, 35a) covering the periphery of the communication pipe (12, 13) is provided,
上記カバー部材(61,81)の端部(65,85)は、上記収容空間(62,82)を形成する位置において上記断熱部材(34a,35a)と固定されるThe end portions (65, 85) of the cover member (61, 81) are fixed to the heat insulating member (34a, 35a) at a position where the housing space (62, 82) is formed.
ことを特徴とする床置式室内ユニット。A floor-standing indoor unit.
請求項1乃至5のいずれか1つにおいて、
上記連絡配管(12,13)の周囲を覆う筒状の断熱部材(12a,13a)を備え、
上記冷媒案内流路(71,91,96)は、上記連絡配管(12,13)と上記断熱部材(12a,13a)との間に形成される隙間流路(71,91)で構成される
ことを特徴とする床置式室内ユニット。
In any one of Claims 1 thru | or 5 ,
A cylindrical heat insulating member (12a, 13a) covering the periphery of the communication pipe (12, 13) is provided,
The refrigerant guide channel (71, 91, 96) includes a clearance channel (71, 91) formed between the communication pipe (12, 13) and the heat insulating member (12a, 13a). A floor-standing indoor unit.
請求項において、
上記継手部材(51,52)は、上記室内配管(32)の液側端部と液側の上記連絡配管(12)とを接続する液側継手部材(51)と、上記室内配管(32)のガス側端部とガス側の上記連絡配管(13)とを接続するガス側継手部材(52)とで構成され、
上記断熱部材(12a,13a)は、液側の上記連絡配管(12)の周囲を覆う液側断熱部材(12a)と、ガス側の上記連絡配管(13)の周囲を覆うガス側断熱部材(13a)とで構成され、
上記冷媒排出機構(60)は、
上記液側継手部材(51)が収容される液側の上記収容空間(62)を形成する液側の上記カバー部材(61)と、
上記ガス側継手部材(52)が収容されるガス側の収容空間(82)を形成するガス側の上記カバー部材(81)とを有し、
上記冷媒案内流路(71,91,96)は、
上記液側のカバー部材(61)の収容空間(62)と室外とを連通させるように、液側の上記連絡配管(12)と上記液側断熱部材(12a)との間に形成される液側の上記隙間流路(70)と、
上記ガス側のカバー部材(81)の収容空間(82)と室外とを連通させるように、ガス側の上記連絡配管(13)と上記ガス側断熱部材(13a)との間に形成されるガス側の上記隙間流路(90)とで構成される
ことを特徴とする床置式室内ユニット。
In claim 6 ,
The joint member (51, 52) includes a liquid side joint member (51) connecting the liquid side end of the indoor pipe (32) and the liquid side connecting pipe (12), and the indoor pipe (32). A gas side joint member (52) that connects the gas side end of the gas and the communication pipe (13) on the gas side,
The heat insulating member (12a, 13a) includes a liquid side heat insulating member (12a) covering the periphery of the liquid side connecting pipe (12) and a gas side heat insulating member (around the gas side connecting pipe (13)). 13a), and
The refrigerant discharge mechanism (60)
The liquid side cover member (61) forming the liquid side accommodation space (62) in which the liquid side joint member (51) is accommodated;
The gas side cover member (81) forming a gas side accommodation space (82) in which the gas side joint member (52) is accommodated, and
The refrigerant guide channel (71, 91, 96)
Liquid formed between the liquid-side connecting pipe (12) and the liquid-side heat insulating member (12a) so as to allow the accommodation space (62) of the liquid-side cover member (61) to communicate with the outside. The gap channel (70) on the side,
Gas formed between the gas-side connecting pipe (13) and the gas-side heat insulating member (13a) so that the accommodation space (82) of the gas-side cover member (81) communicates with the outside. A floor-standing indoor unit comprising the gap channel (90) on the side.
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