JP3360575B2 - Refrigerant recovery method - Google Patents
Refrigerant recovery methodInfo
- Publication number
- JP3360575B2 JP3360575B2 JP21737697A JP21737697A JP3360575B2 JP 3360575 B2 JP3360575 B2 JP 3360575B2 JP 21737697 A JP21737697 A JP 21737697A JP 21737697 A JP21737697 A JP 21737697A JP 3360575 B2 JP3360575 B2 JP 3360575B2
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- oil
- additional
- circuit
- mineral oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/002—Collecting refrigerant from a cycle
Landscapes
- Lubricants (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、冷媒回収方法に
関する。TECHNICAL FIELD The present invention relates <br/> the refrigerant recovery how.
【０００２】[0002]
【従来の技術】たとえば、被代替冷媒としてのＨＣＦＣ
（ハイドロクロロフルオロカーボン）２２を使用してい
る冷凍機からＨＣＦＣ２２を回収して、代替冷媒として
のＨＦＣ（ハイドロフルオロカーボン）系冷媒に切替え
ようとするとき、室内機と室外機はＨＦＣ系冷媒に対応
した別の室内機と室外機に取り替える。2. Description of the Related Art For example, HCFC as a refrigerant to be replaced
When recovering HCFC 22 from a refrigerator using (hydrochlorofluorocarbon) 22 and switching to HFC (hydrofluorocarbon) -based refrigerant as an alternative refrigerant, the indoor unit and the outdoor unit are compatible with HFC-based refrigerant. Replace with another indoor unit and outdoor unit.
【０００３】一方、室内機と室外機とをつないでいる連
絡配管は再使用することが望まれている。特に、上記連
絡配管が長大になるビル内空気調和装置においては、配
管の取り外し、据え付けに多大な時間とコストを要する
ので、連絡配管が再使用が可能になるとコストメリット
が大きい。[0003] On the other hand, it is desired to reuse the communication pipe connecting the indoor unit and the outdoor unit. In particular, in a building air-conditioning apparatus in which the connecting pipe is long, a great deal of time and cost is required for removing and installing the pipe. Therefore, if the connecting pipe can be reused, there is a great cost advantage.
【０００４】[0004]
【発明が解決しようとする課題】ところが、被代替冷媒
ＨＣＦＣ２２と組み合わせて使用している鉱油が連絡配
管内に残留していると、この連絡配管にＨＦＣ系の代替
冷媒を注入したときに上記鉱油がスラッジやコンタミネ
ーションの原因になるという問題がある。However, if the mineral oil used in combination with the refrigerant to be replaced HCFC22 remains in the connecting pipe, when the HFC-based alternative refrigerant is injected into the connecting pipe, the above-mentioned mineral oil is used. Has the problem of causing sludge and contamination.
【０００５】そこで、この発明の目的は、被代替冷媒を
代替冷媒に置き換える際に、室内機と室外機とをつない
でいる連絡配管を再利用できるように、冷媒を回収でき
る冷媒回収方法を提供することにある。An object of the present invention, when replacing the alternative refrigerant alternative refrigerant, for reuse of communication pipe that connects the indoor unit and the outdoor unit, refrigerant recovery how that can be recovered refrigerant To provide.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、請求項１の発明の冷媒回収方法は、鉱油に対して相
溶性があり、かつ、代替冷媒と共に使用される合成油に
対して相溶性がある付加油を、ＨＣＦＣ等の被代替冷媒
が充填されている冷凍機の冷媒回路に入れて、鉱油と付
加油とＨＣＦＣ等の被代替冷媒とを上記冷媒回路内で混
ぜる工程を備えたことを特徴としている。In order to achieve the above object, the refrigerant recovery method according to the present invention is compatible with mineral oil and is compatible with synthetic oil used with an alternative refrigerant. Add soluble oils to substitute refrigerants such as HCFC
And a step of mixing the mineral oil, the additional oil, and the refrigerant to be replaced such as HCFC in the refrigerant circuit of the refrigerator, in which the refrigerant is filled .
【０００７】この請求項１の発明では、上記付加油を冷
媒回路に入れる。この付加油は被代替冷媒に混ざってい
る鉱油と溶け合うから、室外機と室内機とをつなぐ連絡
配管内に付着した鉱油を溶かすことができ、被代替冷媒
と共に鉱油を確実に回収できる。したがって、鉱油が連
絡配管内に残留することを防止できる。また、この付加
油は、上記連絡配管の両端に代替冷媒用の室外機と室内
機を接続して代替冷媒を入れたときに、この代替冷媒と
共に使用される合成油に溶けるから、この付加油自体が
スラッジやコンタミネーションを引き起こすこともな
い。したがって、この請求項１の発明によれば、被代替
冷媒を代替冷媒に置き換える際に、室内機と室外機とを
つないでいる連絡配管を再利用できるように、冷媒を回
収できる。According to the first aspect of the present invention, the additional oil is introduced into the refrigerant circuit. Since the additional oil dissolves in the mineral oil mixed with the refrigerant to be replaced, the mineral oil attached to the communication pipe connecting the outdoor unit and the indoor unit can be dissolved, and the mineral oil can be reliably recovered together with the refrigerant to be replaced. Therefore, it is possible to prevent the mineral oil from remaining in the communication pipe. Further, the additional oil is dissolved in the synthetic oil used together with the alternative refrigerant when the alternative refrigerant is inserted by connecting the outdoor unit and the indoor unit for the alternative refrigerant to both ends of the communication pipe, so that the additional oil is used. It does not itself cause sludge or contamination. Therefore, according to the first aspect of the present invention, the refrigerant can be recovered so that the communication pipe connecting the indoor unit and the outdoor unit can be reused when replacing the refrigerant to be replaced with the alternative refrigerant.
【０００８】また、請求項２の発明は、請求項１に記載
の冷媒回収方法において、上記付加油として鎖式炭化水
素系油を用いることを特徴としている。[0008] A second aspect of the present invention is the refrigerant recovery method according to the first aspect, wherein a chain hydrocarbon-based oil is used as the additional oil.
【０００９】この請求項２の発明によれば、鎖式炭化水
素系の付加油でもって、被代替冷媒に混ざっている鉱油
を溶かして、配管内への残留を無くし、鉱油を被代替冷
媒と共に確実に回収でき、鉱油に起因するスラッジやコ
ンタミネーションの発生を防止できる。しかも、この鎖
式炭化水素系の付加油は代替冷媒と一緒に使用される合
成油に溶けるから、付加油に起因するスラッジやコンタ
ミネーションを引き起こすこともない。したがって、請
求項２の発明によれば、スラッジやコンタミネーション
を引き起こすことなく、被代替冷媒を回収して被代替冷
媒を代替冷媒に置換でき、室内機と室外機とをつないで
いる連絡配管を再利用できる。According to the second aspect of the present invention, the mineral oil mixed with the refrigerant to be replaced is dissolved with the chain-type hydrocarbon-added oil so that the mineral oil remains in the piping, and the mineral oil is removed together with the refrigerant to be replaced. It can be reliably recovered, and the generation of sludge and contamination due to mineral oil can be prevented. In addition, since the chain hydrocarbon-based additional oil is soluble in the synthetic oil used together with the substitute refrigerant, sludge and contamination caused by the additional oil do not occur. Therefore, according to the invention of claim 2, without causing sludge and contamination, the refrigerant to be replaced can be recovered and replaced with the refrigerant to be replaced, and the communication pipe connecting the indoor unit and the outdoor unit can be provided. Can be reused.
【００１０】また、請求項３の発明は、請求項１に記載
の冷媒回収方法において、上記付加油としてアルキルベ
ンゼン油を用いることを特徴としている。The invention according to claim 3 is characterized in that, in the refrigerant recovery method according to claim 1, an alkylbenzene oil is used as the additional oil.
【００１１】この請求項３の発明では、アルキルベンゼ
ン油を冷媒回路への付加油として、冷媒回路内の鉱油を
溶かし、被代替冷媒と鉱油とを確実に回収でき、かつ、
このアルキルベンゼン油は代替冷媒と一緒に使用される
合成油に溶けるから、スラッジやコンタミネーションを
引き起こすこともない。したがって、請求項３の発明に
よれば、被代替冷媒を回収でき、室内機と室外機とをつ
ないでいる連絡配管を代替冷媒でもスラッジやコンタミ
ネーションを引き起こすことなく、再利用できる。According to the third aspect of the present invention, the mineral oil in the refrigerant circuit is dissolved by using the alkylbenzene oil as an additional oil for the refrigerant circuit, and the substitute refrigerant and the mineral oil can be reliably recovered, and
Since the alkylbenzene oil is soluble in the synthetic oil used together with the substitute refrigerant, it does not cause sludge or contamination. Therefore, according to the third aspect of the invention, the refrigerant to be replaced can be recovered, and the communication pipe connecting the indoor unit and the outdoor unit can be reused without causing sludge or contamination even with the replacement refrigerant.
【００１２】また、請求項４の発明は、請求項１乃至３
のいずれか１つに記載の冷媒回収方法において、上記付
加油を上記冷媒回路に入れてから、冷凍機を所定時間だ
け運転して、上記鉱油と付加油と冷媒とを上記冷媒回路
内で混ぜることを特徴としている。Further, the invention of claim 4 provides the invention according to claims 1 to 3
In the refrigerant recovery method according to any one of the above, after the additional oil is put into the refrigerant circuit, the refrigerator is operated for a predetermined time to mix the mineral oil, the additional oil, and the refrigerant in the refrigerant circuit. It is characterized by:
【００１３】この請求項４の発明では、冷凍機を所定時
間運転することによって、付加油と鉱油と冷媒を混ぜ合
わせ、付加油で鉱油を溶かして、鉱油を回収し易くでき
る。According to the fourth aspect of the present invention, by operating the refrigerator for a predetermined time, the additional oil, the mineral oil, and the refrigerant are mixed, and the mineral oil is dissolved with the additional oil, so that the mineral oil can be easily recovered.
【００１４】また、請求項５の発明は、請求項１乃至４
のいずれか１つに記載の冷媒回収方法において、上記冷
媒回路内の鉱油，付加油，冷媒を室外機または回収ボン
ベに回収することを特徴としている。Further, the invention of claim 5 provides the invention according to claims 1 to 4
In the refrigerant recovery method according to any one of the above, the mineral oil, the additional oil, and the refrigerant in the refrigerant circuit are recovered in an outdoor unit or a recovery cylinder.
【００１５】この請求項５の発明では、鉱油，付加油，
冷媒を室外機に回収する場合には、回収ボンベが不要に
なり、回収ボンベに回収する場合には回収後の運搬が容
易になる。According to the fifth aspect of the present invention, mineral oil, additional oil,
When the refrigerant is collected in the outdoor unit, the collection cylinder becomes unnecessary, and when the refrigerant is collected in the collection cylinder, transportation after the collection becomes easy.
【００１６】また、請求項６の発明の冷媒回収方法は、
少なくとも２つのポートを有する冷媒回収装置を用いる
冷媒回収方法であって、 ＨＣＦＣ等の被代替冷媒が充填
されている冷凍機の冷媒回路に、上記冷媒回収装置の上
記２つのポートをつなぎ、 鉱油に対して相溶性があり、
かつ、代替冷媒と共に使用される合成油に対して相溶性
がある付加油を、上記冷媒回収装置から上記冷媒回路に
入れ、 上記冷凍機を所定時間だけ運転して、冷媒回路の
ＨＣＦＣ等の被代替冷媒と鉱油と付加油とを混合し、 上
記冷媒回路内の鉱油，付加油，上記被代替冷媒を室外機
または回収ボンベに回収することを特徴としている。Further, the refrigerant recovery method of the invention according to claim 6 is as follows.
Use a refrigerant recovery device with at least two ports
Refrigerant recovery method, filled with alternative refrigerant such as HCFC
Above the refrigerant recovery device
Connect the two ports and are compatible with mineral oil,
And compatible with synthetic oils used with alternative refrigerants
The additional oil from the refrigerant recovery device to the refrigerant circuit
Placed, and operating the refrigerator for a predetermined time, the refrigerant circuit
Mixing the additional oil as the alternative refrigerant and mineral oils such as HCFC, upper
Mineral oil, additional oil, and the above-mentioned alternative refrigerant in the refrigerant circuit
Alternatively, they are collected in a collection cylinder .
【００１７】この請求項６の発明では、冷凍機の冷媒回
路の冷媒が冷媒回収装置を流通するように２つのポート
を冷媒回路に接続し、この冷媒回収装置から冷媒回路に
付加油を入れる。この付加油は、鉱油に対して相溶性が
あり、かつ、代替冷媒と共に使用される合成油に対して
相溶性がある油である。In the sixth aspect of the invention, two ports are connected to the refrigerant circuit so that the refrigerant in the refrigerant circuit of the refrigerator flows through the refrigerant recovery device, and additional oil is supplied from the refrigerant recovery device to the refrigerant circuit. This additional oil is an oil that is compatible with the mineral oil and is compatible with the synthetic oil used with the alternative refrigerant.
【００１８】このように、上記冷媒回収装置から上記付
加油を冷媒回路に注入し、冷媒回路に付加油を循環させ
ることによって、被代替冷媒に混合されている鉱油を上
記付加油に溶かして、室外機と室内機を接続している連
絡配管に鉱油が残らないように確実に回収できる。[0018] In this manner, the additional oil from the refrigerant recovery apparatus is injected into the refrigerant circuit, by circulating the additional oil to the refrigerant circuit, and dissolved mineral oil is mixed in the alternative refrigerants to the additional oil, Mineral oil can be reliably collected so that no mineral oil remains in the connecting pipe connecting the outdoor unit and the indoor unit.
【００１９】また、請求項７の発明は、請求項６に記載
の冷媒回収方法において、上記冷媒 回収装置は、３つの
ポートを有し、この３つのポートのうちの１つのポート
から、上記付加油を上記冷媒回路に入れることを特徴と
している。[0019] The invention of claim 7 is the refrigerant recovery method according to claim 6, the refrigerant recovery apparatus, have a three ports, one port of the three port
Therefore, the additional oil is introduced into the refrigerant circuit .
【００２０】この冷媒回収方法によれば、２つのポート
を冷媒回路に接続し、残りの１つのポートから上記付加
油を注入することによって、冷媒回路に上記付加油を入
れることができる。また、上記付加油で溶かした鉱油を
上記残りの１つのポートから回収できる。According to this refrigerant recovery method , the two ports are connected to the refrigerant circuit, and the additional oil is injected from the remaining one port, whereby the additional oil can be introduced into the refrigerant circuit. Further, the mineral oil dissolved in the additional oil can be recovered from the remaining one port.
【００２１】また、請求項８の発明は、請求項６または
７に記載の冷媒回収方法において、上記ポートの少なく
とも１つにバルブが取り付けられている冷媒回収装置を
使用することを特徴としている。According to an eighth aspect of the present invention, in the refrigerant recovery method according to the sixth or seventh aspect, there is provided a refrigerant recovery apparatus in which a valve is attached to at least one of the ports.
It is characterized by being used .
【００２２】この冷媒回収方法によれば、ポートの少な
くとも１つにバルブが取り付けられているから、冷媒回
収装置側のバルブ操作でもって、冷媒回収装置への付加
油の注入，冷媒回収装置から冷媒回路への付加油の注入
を制御できる。According to this refrigerant recovery method , since the valve is attached to at least one of the ports, the additional oil is injected into the refrigerant recovery device and the refrigerant is discharged from the refrigerant recovery device by operating the valve on the refrigerant recovery device side. The injection of additional oil into the circuit can be controlled.
【００２３】また、請求項９の発明は、請求項６乃至８
のいずれか１つに記載の冷媒回収方法において、上記冷
媒回収装置は、油溜まり部を備えていることを特徴とし
ている。The ninth aspect of the present invention relates to the sixth to eighth aspects.
In the refrigerant recovery method according to any one of the above,
The medium recovery device includes an oil reservoir.
【００２４】この請求項９の発明では、冷媒回収装置の
油溜まり部に付加油をあらかじめ貯めておき、冷媒回収
装置を冷媒回路に接続することで、油溜まり部から付加
油を冷媒回路に入れることができる。According to the ninth aspect of the present invention, the additional oil is stored in the oil reservoir of the refrigerant recovery device in advance, and the additional oil is introduced into the refrigerant circuit from the oil reservoir by connecting the refrigerant recovery device to the refrigerant circuit. be able to.
【００２５】[0025]
【発明の実施の形態】以下、この発明を図示の実施の形
態により詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
【００２６】図１に、冷凍機としての空気調和機４の室
外機１と室内機２が２本の連絡配管３と５で接続されて
いる様子を示す。上記連絡配管３と５は室外機１のバル
ブ６と７に接続されている。この空気調和機４の冷媒回
路には被代替冷媒としてのＨＣＦＣ２２（Ｒ２２）が充
填されている。また、このＨＣＦＣ２２は冷凍機油とし
ての鉱油との組み合わせで使用されている。この鉱油は
ＨＣＦＣ２２に対して相溶性を有している。FIG. 1 shows a state in which an outdoor unit 1 and an indoor unit 2 of an air conditioner 4 as a refrigerator are connected by two communication pipes 3 and 5. The communication pipes 3 and 5 are connected to valves 6 and 7 of the outdoor unit 1. The refrigerant circuit of the air conditioner 4 is filled with HCFC22 (R22) as a refrigerant to be replaced. The HCFC 22 is used in combination with a mineral oil as a refrigerating machine oil. This mineral oil has compatibility with HCFC22.
【００２７】そして、図２に、この発明の冷媒回収方法
の実施の形態で使用する冷媒回収装置を示す。この冷媒
回収装置２０は、略ボンベ形状の油溜まり部１０とこの
油溜まり部１０の両端から延びている管１１，１２を有
する。この管１１，１２がポートをなす。この管１１に
はバルブ１３が設けられ、管１２にはバルブ１４が設け
られている。また、上記油溜まり部１０の中央から３番
目の管１５が延びている。この管１５は、上記管１１，
１２が延びている方向と交差する方向に延びている。こ
の３番目の管１５にバルブ１７が設けられている。FIG. 2 shows a refrigerant recovery apparatus used in an embodiment of the refrigerant recovery method of the present invention. The refrigerant recovery device 20 includes a substantially cylinder-shaped oil reservoir 10 and tubes 11 and 12 extending from both ends of the oil reservoir 10. The tubes 11 and 12 form ports. The pipe 11 is provided with a valve 13, and the pipe 12 is provided with a valve 14. A third pipe 15 extends from the center of the oil reservoir 10. This tube 15 is the same as the tube 11,
12 extends in a direction intersecting the direction in which it extends. The third pipe 15 is provided with a valve 17.
【００２８】次に、上記冷媒回収装置２０を用いて、上
記空気調和機４のＨＣＦＣ系冷媒および鉱油を回収し
て、ＨＦＣ系の代替冷媒（例えば、Ｒ４１０ＡやＲ４０
７Ｃ）およびこのＨＦＣ系冷媒と組み合わせて用いる合
成油（エーテル油やエステル油）に置換する方法を説明
する。Next, the HCFC-based refrigerant and the mineral oil of the air conditioner 4 are recovered using the refrigerant recovery device 20, and the HFC-based alternative refrigerant (for example, R410A or R40A) is recovered.
7C) and a method of substituting with synthetic oil (ether oil or ester oil) used in combination with this HFC-based refrigerant.
【００２９】まず、図１の空気調和機４を約１０分間だ
けポンプダウン運転して、室外機１内に冷媒（Ｒ２２）
を移動させる。First, the air conditioner 4 of FIG. 1 is pumped down for only about 10 minutes, and the refrigerant (R22) is introduced into the outdoor unit 1.
To move.
【００３０】次に、図１に示す室外機１のバルブ６を閉
じ、バルブ６から連絡配管３を取り外し、連絡配管３の
一端３Ａを図２の冷媒回収装置２０のバルブ１４に接続
する。また、上記冷媒回収装置２０のバルブ１３に予め
接続した補助配管２５を上記室外機１のバルブ６に接続
する。Next, the valve 6 of the outdoor unit 1 shown in FIG. 1 is closed, the connecting pipe 3 is removed from the valve 6, and one end 3A of the connecting pipe 3 is connected to the valve 14 of the refrigerant recovery device 20 shown in FIG. Further, an auxiliary pipe 25 previously connected to the valve 13 of the refrigerant recovery device 20 is connected to the valve 6 of the outdoor unit 1.
【００３１】次に、上記冷媒回収装置２０のバルブ１３
と１４を開き、バルブ１７を開いて、このバルブ１７か
ら管１５を通して、アルキルベンゼン油を油溜まり部１
０に導入し、上記連絡配管３へ注入する。Next, the valve 13 of the refrigerant recovery device 20
And 14 are opened, the valve 17 is opened, and the alkylbenzene oil is supplied from the valve 17 to the oil reservoir 1 through the pipe 15.
0 and injected into the communication pipe 3.
【００３２】次に、上記空気調和機４を所定時間（通常
３０分から６０分）だけ運転して、上記アルキルベンゼ
ン油および冷媒Ｒ２２および鉱油を上記連絡配管３およ
び５を含む冷媒回路に循環させる。これにより、上記ア
ルキルベンゼン油と鉱油とＲ２２とを混ぜ合わせる。図
５に示すように、アルキルベンゼン油は鉱油に対して相
溶性があるから、上記連絡配管３，５の内面にコンタミ
ネーションとなって付着している鉱油を上記アルキルベ
ンゼン油に溶かすことができる。Next, the air conditioner 4 is operated for a predetermined time (usually 30 to 60 minutes) to circulate the alkylbenzene oil, the refrigerant R22 and the mineral oil through the refrigerant circuit including the connecting pipes 3 and 5. Thus, the alkylbenzene oil, the mineral oil, and R22 are mixed. As shown in FIG. 5, since the alkylbenzene oil is compatible with the mineral oil, the mineral oil adhering to the inner surfaces of the communication pipes 3 and 5 as a contamination can be dissolved in the alkylbenzene oil.
【００３３】また、図３に示すように、上記運転時間が
６０分を越すと、回収率の上昇が鈍化する一方、上記運
転時間が３０分以下になると回収率が急に低下する。As shown in FIG. 3, when the operation time exceeds 60 minutes, the recovery rate slows down, while when the operation time is 30 minutes or less, the recovery rate sharply decreases.
【００３４】また、上記付加油としてのアルキルベンゼ
ン油の量を上記鉱油の量よりも多く設定しておくことに
よって、アルキルベンゼン油で鉱油を充分に溶かすこと
ができ、連絡配管３，５内に鉱油が残留することを回避
できる。具体的には、図４に示すように、冷媒中に含ま
れる(鉱油＋アルキルベンゼン油)の量（重量％）を多く
する程、鉱油回収率を向上させることができる。Further, by setting the amount of the alkylbenzene oil as the additional oil larger than the amount of the mineral oil, the mineral oil can be sufficiently dissolved by the alkylbenzene oil. Residuals can be avoided. Specifically, as shown in FIG. 4, the greater the amount (% by weight) of (mineral oil + alkylbenzene oil) contained in the refrigerant, the more the mineral oil recovery rate can be improved.
【００３５】次に、再度、１０分間ほどポンプダウン運
転して、室外機１に冷媒Ｒ２２と鉱油とアルキルベンゼ
ン油とを移し、バルブ６と７を閉じ、バルブ６と７から
連絡配管３と５を取り外す。また、室内機２を連絡配管
３と５から取り外す。また、連絡配管３から冷媒回収装
置２０を取り外す。Next, the pump R is operated again for about 10 minutes to transfer the refrigerant R22, mineral oil and alkylbenzene oil to the outdoor unit 1, close the valves 6 and 7, and connect the connecting pipes 3 and 5 from the valves 6 and 7. Remove. Also, the indoor unit 2 is removed from the communication pipes 3 and 5. Further, the refrigerant recovery device 20 is removed from the communication pipe 3.
【００３６】ここで、上記連絡配管３および５内は上記
アルキルベンゼン油の流通によって、鉱油や他のコンタ
ミネーションが溶かされて洗い流されているので、次の
代替冷媒用の室外機，室内機に接続して、再利用するこ
とができる。Here, since the inside of the communication pipes 3 and 5 is washed away by dissolving the mineral oil and other contaminants by the flow of the alkylbenzene oil, the connection pipes are connected to the next outdoor unit and the indoor unit for the alternative refrigerant. And can be reused.
【００３７】また、上記連絡配管３および５内にアルキ
ルベンゼン油が残留していても、このアルキルベンゼン
油は、図５に示すように、代替冷媒としてのＨＦＣ系冷
媒と組み合わせて使用されるエーテル系油やエステル系
油に対して相溶性があるので、スラッジやコンタミネー
ションの原因にならない。Even if the alkylbenzene oil remains in the communication pipes 3 and 5, this alkylbenzene oil is used in combination with an HFC refrigerant as an alternative refrigerant as shown in FIG. It is compatible with oils and ester oils and does not cause sludge or contamination.
【００３８】したがって、連絡配管を再利用して配管取
換えコストを削減でき、特に、上記連絡配管が長大にな
るビル内空気調和機では、コストメリットが大きい。Therefore, the cost of replacing the pipes can be reduced by reusing the communication pipes, and the cost merit is particularly great in an in-building air conditioner in which the connection pipes are long.
【００３９】尚、上記実施の形態で使用した冷媒回収装
置２０は、３番目の管１５を有したが、この３番目の管
１５が無く、２つの管１１，１２だけを有していても良
い。この場合には、上記連絡配管３への接続前に予め油
溜まり部１０内にアルキルベンゼン油を入れておけば良
い。もっとも、上記３番目の管１５を有する場合には、
管１５から付加油としてのアルキルベンゼン油を所望の
量だけ注入できる利点がある。また、上記管１５から真
空引きを行なうことで、充填した油内に存在する気泡を
排出することができる利点がある。Although the refrigerant recovery device 20 used in the above embodiment has the third tube 15, even if the third tube 15 is not provided and only the two tubes 11 and 12 are provided. good. In this case, the alkylbenzene oil may be put in the oil reservoir 10 in advance before the connection to the connection pipe 3. However, when the above-mentioned third tube 15 is provided,
There is an advantage that a desired amount of alkylbenzene oil as an additional oil can be injected from the pipe 15. In addition, there is an advantage that by performing the evacuation from the pipe 15, air bubbles existing in the filled oil can be discharged.
【００４０】また、上記油溜まり部１０は無くてもよい
が、上記油溜まり部１０の存在により、上述のように予
め付加油を充填しておけるという利点の加え、上記油内
気泡を油溜まり部１０の上方に溜めて上記３番目の管１
５から排出しやすくなる。Although the oil reservoir 10 may be omitted, the presence of the oil reservoir 10 has the advantage that the additional oil can be filled in advance as described above. The third pipe 1 is stored above the part 10
5 makes it easier to discharge.
【００４１】また、上記実施の形態の冷媒回収方法で
は、付加油としてアルキルベンゼン油をもちいたが、付
加油として、パラフィン系炭化水素油等の他の鎖式炭化
水素系油を用いても良い。Further, in the refrigerant recovery method of the above embodiment, the alkylbenzene oil is used as the additional oil, but another chain hydrocarbon oil such as a paraffinic hydrocarbon oil may be used as the additional oil.
【００４２】また、上記実施の形態では、室外機１内に
（Ｒ２２＋鉱油＋アルキルベンゼン油）を回収したが、
冷媒回路に回収ポートを設けて、この回収ポートから回
収ボンベに回収してもよい。In the above embodiment, (R22 + mineral oil + alkylbenzene oil) was collected in the outdoor unit 1.
A collection port may be provided in the refrigerant circuit, and the refrigerant may be collected in the collection cylinder from the collection port.
【００４３】[0043]
【発明の効果】以上より明らかなように、請求項１の発
明の冷媒回収方法は、鉱油に対して相溶性があり、か
つ、代替冷媒と共に使用される合成油に対して相溶性が
ある付加油を、ＨＣＦＣ等の被代替冷媒が充填されてい
る冷凍機の冷媒回路に入れて、鉱油と付加油とＨＣＦＣ
等の被代替冷媒とを上記冷媒回路内で混ぜる工程を備え
た。As is clear from the above, the refrigerant recovery method of the present invention according to claim 1 is compatible with mineral oil and compatible with synthetic oil used together with the alternative refrigerant. Oil is filled with an alternative refrigerant such as HCFC.
Put in the refrigerant circuit of the refrigerator that, mineral oil and additional oil and HCFC
And the like in the refrigerant circuit.
【００４４】この請求項１の発明では、この付加油は被
代替冷媒に混ざっている鉱油と溶け合うから、室外機と
室内機とをつなぐ連絡配管内に付着した鉱油を溶かすこ
とができ、被代替冷媒と共に鉱油を確実に回収できる。
したがって、鉱油が連絡配管内に残留することを防止で
きる。また、この付加油は、代替冷媒と共に使用される
合成油に溶けるから、この付加油自体がスラッジやコン
タミネーションを引き起こすこともない。したがって、
被代替冷媒を代替冷媒に置き換える際に、室内機と室外
機とをつないでいる連絡配管を再利用できるように、冷
媒を回収できる。According to the first aspect of the present invention, since the additional oil dissolves in the mineral oil mixed with the refrigerant to be replaced, the mineral oil attached to the connecting pipe connecting the outdoor unit and the indoor unit can be dissolved, and Mineral oil can be reliably recovered together with the refrigerant.
Therefore, it is possible to prevent the mineral oil from remaining in the communication pipe. Further, since the additional oil is soluble in the synthetic oil used together with the substitute refrigerant, the additional oil itself does not cause sludge or contamination. Therefore,
When the refrigerant to be replaced is replaced with the substitute refrigerant, the refrigerant can be collected so that the communication pipe connecting the indoor unit and the outdoor unit can be reused.
【００４５】また、請求項２の発明によれば、鎖式炭化
水素系の付加油でもって、被代替冷媒に混ざっている鉱
油を溶かして、配管内への残留を無くし、鉱油を被代替
冷媒と共に確実に回収でき、鉱油に起因するスラッジや
コンタミネーションの発生を防止できる。しかも、この
鎖式炭化水素系の付加油は代替冷媒と一緒に使用される
合成油に溶けるから、付加油に起因するスラッジやコン
タミネーションを引き起こすこともない。したがって、
請求項２の発明によれば、被代替冷媒を回収して被代替
冷媒を代替冷媒に置換し、スラッジやコンタミネーショ
ンを引き起こすことなく、室内機と室外機とをつないで
いる連絡配管を再利用できる。According to the second aspect of the present invention, the mineral oil mixed with the refrigerant to be replaced is dissolved with the chain-type hydrocarbon-based additive oil to eliminate the residual oil in the piping, and the mineral oil is replaced with the refrigerant to be replaced. Together with the oil, and can reliably prevent sludge and contamination caused by mineral oil. In addition, since the chain hydrocarbon-based additional oil is soluble in the synthetic oil used together with the substitute refrigerant, sludge and contamination caused by the additional oil do not occur. Therefore,
According to the invention of claim 2, the replacement refrigerant is recovered, the replacement refrigerant is replaced with the replacement refrigerant, and the communication pipe connecting the indoor unit and the outdoor unit is reused without causing sludge or contamination. it can.
【００４６】また、請求項３の発明では、アルキルベン
ゼン油を冷媒回路への付加油として、冷媒回路内の鉱油
を溶かし、被代替冷媒と鉱油とを確実に回収でき、か
つ、このアルキルベンゼン油は代替冷媒と一緒に使用さ
れる合成油に溶けるから、スラッジやコンタミネーショ
ンを引き起こすこともない。したがって、被代替冷媒で
使用していた室内機と室外機とをつないでいる連絡配管
を代替冷媒でもスラッジやコンタミネーションを引き起
こすことなく、再利用できる。According to the third aspect of the present invention, the mineral oil in the refrigerant circuit is dissolved by using the alkylbenzene oil as an additional oil to the refrigerant circuit, and the refrigerant to be replaced and the mineral oil can be reliably recovered. Since it dissolves in the synthetic oil used together with the refrigerant, it does not cause sludge or contamination. Therefore, the communication pipe connecting the indoor unit and the outdoor unit, which has been used as the refrigerant to be replaced, can be reused without causing sludge and contamination even with the substitute refrigerant.
【００４７】また、請求項４の発明では、冷凍機を所定
時間運転することによって、付加油と鉱油と冷媒を混ぜ
合わせ、付加油で鉱油を溶かして、鉱油を回収し易くで
きる。In the invention of claim 4, by operating the refrigerator for a predetermined time, the additional oil, the mineral oil, and the refrigerant are mixed, and the mineral oil is dissolved with the additional oil, so that the mineral oil can be easily recovered.
【００４８】また、請求項５の発明は、請求項１乃至４
のいずれか１つに記載の冷媒回収方法において、上記冷
媒回路内の鉱油，付加油，冷媒を室外機または回収ボン
ベに回収する。鉱油，付加油，冷媒を室外機に回収する
場合には、回収ボンベが不要になり、回収ボンベに回収
する場合には回収後の運搬が容易になる。Further, the invention of claim 5 provides the invention according to claims 1 to 4
In the refrigerant recovery method according to any one of the above, the mineral oil, the additional oil, and the refrigerant in the refrigerant circuit are recovered in an outdoor unit or a recovery cylinder. When the mineral oil, additional oil, and refrigerant are collected in the outdoor unit, no collection cylinder is required, and when collected in the collection cylinder, transportation after collection is facilitated.
【００４９】また、請求項６の発明の冷媒回収方法で
は、冷凍機の冷媒回路の冷媒が冷媒回収装置を流通する
ように２つのポートを冷媒回路に接続し、この冷媒回収
装置から冷媒回路に付加油を入れることができる。この
付加油としては、鉱油に対して相溶性があり、かつ、代
替冷媒と共に使用される合成油に対して相溶性がある油
を用いる。この冷媒回収装置から上記付加油を冷媒回路
に注入し、冷媒回路に付加油を循環させることによっ
て、被代替冷媒に混合されている鉱油を上記付加油に溶
かして、室外機と室内機を接続している連絡配管に鉱油
が残らないように確実に回収できる。According to the refrigerant recovery method of the present invention, two ports are connected to the refrigerant circuit so that the refrigerant in the refrigerant circuit of the refrigerator flows through the refrigerant recovery device. Additional oil can be charged from the device to the refrigerant circuit. As the additional oil, an oil that is compatible with the mineral oil and that is compatible with the synthetic oil used together with the alternative refrigerant is used. By injecting the additional oil into the refrigerant circuit from the refrigerant recovery device and circulating the additional oil in the refrigerant circuit, the mineral oil mixed with the substitute refrigerant is dissolved in the additional oil and the outdoor unit and the indoor unit are connected. Mineral oil can be reliably collected so that it does not remain in the connecting pipe.
【００５０】また、請求項７の発明は、請求項６に記載
の冷媒回収方法において、上記冷媒回収装置は、３つの
ポートを有し、この３つのポートのうちの１つのポート
から、上記付加油を上記冷媒回路に入れる。この冷媒回
収方法によれば、２つのポートを冷媒回路に接続し、残
りの１つのポートから上記付加油を注入することによっ
て、冷媒回路に上記付加油を入れることができる。ま
た、上記付加油で溶かした鉱油を上記残りの１つのポー
トから回収できる。[0050] The invention of claim 7 is the refrigerant recovery method according to claim 6, the refrigerant recovery apparatus, have a three ports, one port of the three port
Then, the additional oil is put into the refrigerant circuit. According to this refrigerant recovery method , the two additional ports are connected to the refrigerant circuit, and the additional oil can be injected into the refrigerant circuit by injecting the additional oil from the remaining one port. Further, the mineral oil dissolved in the additional oil can be recovered from the remaining one port.
【００５１】また、請求項８の発明は、請求項６または
７に記載の冷媒回収方法において、上記ポートの少なく
とも１つにバルブが取り付けられている冷媒回収装置を
使用する。この冷媒回収方法によれば、ポートの少なく
とも１つにバルブが取り付けられているから、冷媒回収
装置側のバルブ操作でもって、冷媒回収装置への付加油
の注入，冷媒回収装置から冷媒回路への付加油の注入を
制御できる。[0051] The invention of claim 8 is the refrigerant recovery method according to claim 6 or 7, the refrigerant recovery apparatus to at least one valve of the port is attached
use. According to this refrigerant recovery method , since a valve is attached to at least one of the ports, the additional oil is injected into the refrigerant recovery device and the refrigerant recovery device is connected to the refrigerant circuit by operating the valve on the refrigerant recovery device side. Can control the injection of additional oil.
【００５２】また、請求項９の発明は、請求項６乃至８
のいずれか１つに記載の冷媒回収方法において、上記冷
媒回収装置は、油溜まり部を備えている。この油溜まり
部に付加油をあらかじめ貯めておき、冷媒回収装置を冷
媒回路に接続することで、油溜まり部から付加油を冷媒
回路に入れることができる。The ninth aspect of the present invention relates to the sixth to eighth aspects.
In the refrigerant recovery method according to any one of the above,
The medium recovery device includes an oil reservoir. By storing the additional oil in the oil reservoir in advance and connecting the refrigerant recovery device to the refrigerant circuit, the additional oil can be introduced into the refrigerant circuit from the oil reservoir.
【図１】 この発明の冷媒回収方法の実施の形態を説明
するために、空気調和機４の連絡配管と室外機と室内機
との接続を示す模式図である。[1] In order to explain the embodiment of the refrigerant recovery how of the present invention, is a schematic diagram showing the connection between the air conditioner 4 for connecting pipe and the outdoor unit and the indoor unit.
【図２】 この発明の冷媒回収方法の実施の形態で使用
する装置を示す模式図である。FIG. 2 is used in the embodiment of the refrigerant recovery method of the present invention.
FIG. 2 is a schematic diagram showing an apparatus for performing the method.
【図３】 上記冷媒回収方法の実施の形態において、付
加油付加後の空気調和機の運転時間と鉱油回収率との関
係を示す特性図である。FIG. 3 is a characteristic diagram showing a relationship between an operation time of an air conditioner after addition of an additional oil and a mineral oil recovery rate in the embodiment of the refrigerant recovery method.
【図４】 付加油量と鉱油回収率との関係を示す図であ
る。FIG. 4 is a diagram showing a relationship between an additional oil amount and a mineral oil recovery rate.
【図５】 代替冷媒（ＨＦＣ系冷媒），合成油（エーテ
ル系油，エステル系油），アルキルベンゼン油，鉱油，
被代替冷媒（ＨＣＦＣ系油）の相溶と非相溶の関係を示
す図である。FIG. 5: Alternative refrigerant (HFC-based refrigerant), synthetic oil (ether-based oil, ester-based oil), alkylbenzene oil, mineral oil,
It is a figure which shows the relationship of compatibility and immiscibility of a refrigerant to be replaced (HCFC type | system | group oil).
１…室外機、２…室内機、３，５…連絡配管、４…空気
調和機、６，７…バルブ、１０…油溜まり部、１１，１
２…管、１３，１４…バルブ、１５…管、１７…バル
ブ、２０…冷媒回収装置。DESCRIPTION OF SYMBOLS 1 ... Outdoor unit, 2 ... Indoor unit, 3,5 ... Connection piping, 4 ... Air conditioner, 6,7 ... Valve, 10 ... Oil pool part, 11,1
2 ... pipe, 13, 14 ... valve, 15 ... pipe, 17 ... valve, 20 ... refrigerant recovery device.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 45/00 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) F25B 45/00
Claims (9)
冷媒と共に使用される合成油に対して相溶性がある付加
油を、ＨＣＦＣ等の被代替冷媒が充填されている冷凍機
の冷媒回路に入れて、鉱油と付加油とＨＣＦＣ等の被代
替冷媒とを上記冷媒回路内で混ぜる工程を備えたことを
特徴とする冷媒回収方法。An additive oil compatible with mineral oil and compatible with synthetic oil used together with an alternative refrigerant is used as a refrigerant for a refrigerator filled with an alternative refrigerant such as HCFC. Put into the circuit and replace mineral oil, additional oil, HCFC, etc.
A method for recovering a refrigerant, comprising a step of mixing a replacement refrigerant in the refrigerant circuit.
て、上記付加油として鎖式炭化水素系油を用いることを
特徴とする冷媒回収方法。2. The refrigerant recovery method according to claim 1, wherein a chain hydrocarbon-based oil is used as the additional oil.
て、 上記付加油としてアルキルベンゼン油を用いることを特
徴とする冷媒回収方法。3. The refrigerant recovery method according to claim 1, wherein an alkylbenzene oil is used as the additional oil.
冷媒回収方法において、 上記付加油を上記冷媒回路に入れてから、冷凍機を所定
時間だけ運転して、上記鉱油と付加油と冷媒とを上記冷
媒回路内で混ぜることを特徴とする冷媒回収方法。4. The method for recovering refrigerant according to claim 1, wherein the additional oil is put into the refrigerant circuit, and then the refrigerator is operated for a predetermined time, so that the mineral oil and the additional oil are operated. And a refrigerant in the refrigerant circuit.
冷媒回収方法において、 上記冷媒回路内の鉱油，付加油，冷媒を室外機または回
収ボンベに回収することを特徴とする冷媒回収方法。5. The refrigerant recovery method according to claim 1, wherein the mineral oil, the additional oil, and the refrigerant in the refrigerant circuit are recovered in an outdoor unit or a recovery cylinder. Method.
収装置を用いる冷媒回収方法であって、 ＨＣＦＣ等の被代替冷媒が充填されている冷凍機の冷媒
回路に、上記冷媒回収装置の上記２つのポートをつな
ぎ、 鉱油に対して相溶性があり、かつ、代替冷媒と共に使用
される合成油に対して相溶性がある付加油を、上記冷媒
回収装置から上記冷媒回路に入れ、 上記冷凍機を所定時間だけ運転して、冷媒回路のＨＣＦ
Ｃ等の被代替冷媒と鉱油と付加油とを混合し、 上記冷媒回路内の鉱油，付加油，上記被代替冷媒を室外
機または回収ボンベに回収する ことを特徴とする冷媒回
収方法。6. A refrigerant circuit having at least two ports.
A refrigerant recovery method using a collecting device, wherein the refrigerant of a refrigerator filled with a refrigerant to be replaced such as HCFC
Connect the two ports of the refrigerant recovery device to the circuit.
Technique, there are compatible with mineral oils, and, used with the alternative refrigerant
The additional oil that is compatible with the synthetic oil
The refrigerant is put into the refrigerant circuit from the recovery device , the refrigerator is operated for a predetermined time, and the HCF of the refrigerant circuit is
C. A substitute refrigerant such as C, a mineral oil, and an additional oil are mixed, and the mineral oil, the additional oil, and the substitute refrigerant in the refrigerant circuit are outdoor.
A refrigerant collection method, wherein the refrigerant is collected in a machine or a collection cylinder .
て、上記冷媒回収装置は、 ３つのポートを有し、この３つの
ポートのうちの１つのポートから、上記付加油を上記冷
媒回路に入れることを特徴とする冷媒回収方法。Te refrigerant recovery method smell <br/> according to claim 7 claim 6, the refrigerant recovery apparatus, have a three-port, the three
From one of the ports, the additional oil is cooled
A refrigerant recovery method, wherein the refrigerant is put in a medium circuit .
において、 上記ポートの少なくとも１つにバルブが取り付けられて
いる冷媒回収装置を使用することを特徴とする冷媒回収
方法。8. The refrigerant recovery method according to claim 6, wherein a refrigerant recovery device having a valve attached to at least one of the ports is used .
冷媒回収方法において、上記冷媒回収装置は、 油溜まり部を備えていることを特
徴とする冷媒回収方法。9. The refrigerant recovery method according to any one of claims 6 to 8, the refrigerant recovery apparatus, a refrigerant recovery method which is characterized in that it comprises an oil reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21737697A JP3360575B2 (en) | 1997-08-12 | 1997-08-12 | Refrigerant recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21737697A JP3360575B2 (en) | 1997-08-12 | 1997-08-12 | Refrigerant recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1163743A JPH1163743A (en) | 1999-03-05 |
| JP3360575B2 true JP3360575B2 (en) | 2002-12-24 |
Family
ID=16703211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21737697A Expired - Fee Related JP3360575B2 (en) | 1997-08-12 | 1997-08-12 | Refrigerant recovery method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3360575B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11988426B2 (en) | 2018-09-28 | 2024-05-21 | Daikin Industries, Ltd. | Refrigerant charging method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4425488B2 (en) * | 2001-03-15 | 2010-03-03 | 三菱電機株式会社 | Refrigeration / air-conditioner construction method and information processing system |
| JP4517834B2 (en) * | 2004-12-02 | 2010-08-04 | 三菱電機株式会社 | How to use existing refrigerant piping |
| JP2010019550A (en) * | 2009-10-28 | 2010-01-28 | Mitsubishi Electric Corp | Method for installing freezer/air conditioner |
| EP4079831A4 (en) * | 2020-01-31 | 2023-06-28 | Daikin Industries, Ltd. | Method for replacing refrigerant in refrigeration device, refrigerator oil, and container |
-
1997
- 1997-08-12 JP JP21737697A patent/JP3360575B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11988426B2 (en) | 2018-09-28 | 2024-05-21 | Daikin Industries, Ltd. | Refrigerant charging method |
| US11994323B2 (en) | 2018-09-28 | 2024-05-28 | Daikin Industries, Ltd. | Refrigerant charging method, heat source unit, and renewed refrigeration cycle apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1163743A (en) | 1999-03-05 |
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