JP2001174111A - Flushing system for refrigeration cycle or the like - Google Patents
Flushing system for refrigeration cycle or the likeInfo
- Publication number
- JP2001174111A JP2001174111A JP36233799A JP36233799A JP2001174111A JP 2001174111 A JP2001174111 A JP 2001174111A JP 36233799 A JP36233799 A JP 36233799A JP 36233799 A JP36233799 A JP 36233799A JP 2001174111 A JP2001174111 A JP 2001174111A
- Authority
- JP
- Japan
- Prior art keywords
- cleaning agent
- heater
- cooler
- pipe
- refrigeration cycle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気調和機、冷蔵
庫、冷凍ショーケース、冷凍機等の冷凍サイクルの系内
を洗浄するのに好適な洗浄装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning apparatus suitable for cleaning the inside of a refrigeration cycle system such as an air conditioner, a refrigerator, a freezer showcase, and a refrigerator.
【０００２】[0002]
【従来の技術及びその課題】従来、この種冷凍サイクル
の系内にはＲ11、Ｒ12、Ｒ500 等の冷媒が充填されてい
たが、これら冷媒は特定フロンと総称され、オゾン層を
破壊する原因物質としてその製造が禁止され、近い将来
その使用を禁止することが予定されている。2. Description of the Related Art Conventionally, refrigerants such as R11, R12 and R500 have been filled in the system of this type of refrigeration cycle, but these refrigerants are collectively referred to as specific CFCs and are substances causing ozone layer destruction. Its production has been banned and its use is expected to be banned in the near future.
【０００３】そして、この特定フロンに代えてＨＦＣ
（ハイドロフルオロカーボン）系やＨＣＦＣ（ハイドロ
クロロフルオロカーボン）系等の環境に優しい代替冷媒
と総称される冷媒の使用が推奨されている。[0003] Instead of this specific CFC, HFC
It is recommended to use refrigerants generally referred to as environmentally friendly alternative refrigerants such as (hydrofluorocarbon) type and HCFC (hydrochlorofluorocarbon) type.
【０００４】しかし、この種冷凍サイクルには、その系
内に冷媒を循環させるために冷媒圧縮機が介装されてお
り、この冷媒圧縮機を潤滑するための冷凍機油が冷媒に
同伴されて冷凍サイクルの系内を循環している。However, in this type of refrigeration cycle, a refrigerant compressor is interposed to circulate the refrigerant in the system, and refrigeration oil for lubricating the refrigerant compressor is entrained by the refrigerant and refrigerated. Circulating in the cycle system.
【０００５】この冷凍機油は冷媒と相溶性が良いものが
選ばれるので、特定フロンを用いる場合にはスニソ油等
の鉱油系の冷凍機油が選ばれるが、代替冷媒を用いる場
合にはエステル、エーテル等の合成油からなる冷凍機油
が選ばれる。[0005] Since this refrigerating machine oil is selected to have good compatibility with the refrigerant, mineral oil type refrigerating machine oil such as suniso oil is selected when using specific freon. However, when using alternative refrigerant, ester or ether is used. Refrigeration oil composed of a synthetic oil such as
【０００６】既設の冷凍サイクルの系内から特定フロン
を排出して代替冷媒を充填したとき、冷凍サイクルの系
内に鉱油系の冷凍機油が僅かでも残留していると、この
鉱油系の冷凍機油は代替冷媒に対して相溶性がないの
で、冷凍サイクルの系内に介装されている冷媒圧縮機の
潤滑性能が損なわれたり、膨張弁やキャピラリチューブ
等が目詰まりするおそれがある。[0006] When a specific refrigerant is discharged from the existing refrigeration cycle system and an alternative refrigerant is charged, if any mineral oil-based refrigeration oil remains in the refrigeration cycle system, the mineral oil-based refrigeration oil is removed. Is not compatible with the alternative refrigerant, so that the lubrication performance of the refrigerant compressor interposed in the refrigeration cycle system may be impaired, or the expansion valve, the capillary tube, etc. may be clogged.
【０００７】そこで、既設の冷凍サイクルの系内から特
定フロンを排出した後、代替冷媒を充填するのに先立っ
て系内に残存する鉱油系の冷凍機油や異物を洗浄するた
めに冷凍サイクルの系内をＨＣＦＣ141bやＣＦＣ11等か
らなる液状の洗浄剤を循環させることが提案されたが、
洗浄に時間が掛かるのみならず使用済の洗浄剤を再生す
ることができず、また、使用済の洗浄剤を完全に回収す
ることが難しく、その一部が大気中に放出されるおそれ
があった。[0007] Therefore, after the specific chlorofluorocarbon is discharged from the existing refrigeration cycle system, the refrigeration cycle system is used to clean mineral oil refrigeration machine oil and foreign matter remaining in the system prior to filling with the alternative refrigerant. It has been proposed to circulate a liquid detergent composed of HCFC141b, CFC11, etc.
Not only does it take a long time to wash, but it is not possible to regenerate the used cleaning agent, and it is difficult to completely recover the used cleaning agent, and there is a risk that some of the cleaning agent will be released to the atmosphere. Was.
【０００８】[0008]
【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、その要旨とすると
ころは、タンク内に貯溜された液状の洗浄剤を冷凍サイ
クル等の被洗浄物に移送する供給管に不活性ガスの導入
管を接続するとともにこの導入管の接続部の後流側に加
熱器を介装し、かつ、上記被洗浄物を流過した洗浄剤を
上記タンクに戻す戻り管に再生ヒータとこの再生ヒータ
の後流側に冷却器を介装したことを特徴とする冷凍サイ
クル等の洗浄装置にある。DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of the present invention is that a liquid cleaning agent stored in a tank is covered by a refrigeration cycle or the like. An inert gas introduction pipe is connected to a supply pipe to be transferred to the article to be washed, and a heater is interposed on the downstream side of the connection section of the introduction pipe, and the cleaning agent that has flowed through the article to be washed is filled with the above-described cleaning agent. A cleaning device such as a refrigeration cycle is characterized in that a regenerative heater is provided in a return pipe returning to a tank and a cooler is interposed on a downstream side of the regenerative heater.
【０００９】他の特徴とするところは、上記再生ヒータ
及び冷却器に対して並列にこれらをバイパスするリター
ン回路を接続し、かつ、上記再生ヒータ及び冷却器を流
過する洗浄剤の流量を調節する手段を設けたことにあ
る。Another feature is that a return circuit for bypassing the regeneration heater and the cooler is connected in parallel to the regeneration heater and the cooler, and the flow rate of the cleaning agent flowing through the regeneration heater and the cooler is adjusted. That is, a means for performing the operation is provided.
【００１０】他の特徴とするところは、上記冷却器を流
過した洗浄剤を上記タンクをバイパスして上記供給管に
導入するバイパス回路を設けたことにある。Another feature is that a bypass circuit is provided for introducing the cleaning agent flowing through the cooler to the supply pipe by bypassing the tank.
【００１１】他の特徴とするところは、上記被洗浄物の
出口又は上記タンクの入口の戻り管に上記被洗浄物から
取り除けられた異物を捕捉するための第１のフィルタを
介装したことにある。Another feature is that a first filter for catching foreign matter removed from the object to be cleaned is interposed in an outlet of the object to be cleaned or a return pipe at an inlet of the tank. is there.
【００１２】更に他の特徴とするところは、上記冷却器
を流過した洗浄剤から分離された不活性ガスを大気に放
出するガス排出管に不活性ガス中に含まれる洗浄剤を捕
捉する第２のフィルタを介装したことにある。Still another feature is that the cleaning agent contained in the inert gas is captured by a gas discharge pipe for releasing an inert gas separated from the cleaning agent flowing through the cooler to the atmosphere. 2 filter is interposed.
【００１３】[0013]
【発明の実施形態】本発明の実施形態が図１示されてい
る。液状の洗浄剤を貯溜するタンク１は冷凍サイクル等
の被洗浄物２と供給管３及び戻り管４により接続されて
閉回路を構成している。FIG. 1 shows an embodiment of the present invention. A tank 1 for storing a liquid detergent is connected to an object 2 to be cleaned such as a refrigeration cycle by a supply pipe 3 and a return pipe 4 to form a closed circuit.
【００１４】供給管３には液ポンプ５、開閉弁６、加熱
器７が被洗浄物２に向かってこの順に介装されている。
そして、この供給管３の開閉弁６の後流側にはボンベ９
のガス管８が接続され、このガス管８の供給管３への接
続端の近傍には開閉弁31が介装されている。The supply pipe 3 is provided with a liquid pump 5, an on-off valve 6, and a heater 7 in this order toward the object 2 to be cleaned.
A cylinder 9 is provided downstream of the on-off valve 6 of the supply pipe 3.
The gas pipe 8 is connected, and an on-off valve 31 is interposed in the vicinity of the connection end of the gas pipe 8 to the supply pipe 3.
【００１５】戻り管４には第１のフィルタ10、再生ヒー
タ11、冷却器12がタンク１に向かってこの順に介装され
ている。そして、これら再生ヒータ11及び冷却器12に対
して並列にこれらをバイパスするリターン回路14が接続
されている。そして、リターン回路14の入口には開閉弁
28が介装され、再生ヒータ11の入口には流量制御弁29が
介装されている。A first filter 10, a regenerative heater 11, and a cooler 12 are provided in the return pipe 4 in this order toward the tank 1. A return circuit 14 that bypasses the regenerative heater 11 and the cooler 12 is connected in parallel to the regenerative heater 11 and the cooler 12. And an on-off valve is provided at the inlet of the return circuit 14.
A flow control valve 29 is provided at the inlet of the regeneration heater 11.
【００１６】再生ヒータ11の密閉容器11a 内にはスライ
ダック式ヒータ15が配設され、この密閉容器11a の底部
には冷凍機油の排油管16の基端が接続されている。A reslidable heater 15 is provided in a closed vessel 11a of the regenerative heater 11, and a bottom end of the closed vessel 11a is connected to a base end of a refrigerating machine oil drain pipe 16.
【００１７】この排油管16の基部には開閉弁18が介装さ
れ、その後流側には基端より上方に立ち上がるトラップ
17が形成されている。そして、このトラップ17の後流側
にはフィルタ19及び開閉弁20がこの順に介装され、排油
管16の先端は油タンク21内に開口している。An opening / closing valve 18 is interposed at the base of the oil drain pipe 16, and a trap rising upward from the base end is provided on the downstream side.
17 are formed. A filter 19 and an on-off valve 20 are interposed in this order on the downstream side of the trap 17, and the tip of the oil drain pipe 16 is opened into the oil tank 21.
【００１８】冷却器12の密閉容器12a 内には熱交換管12
b が配設され、この管外を冷却水が循環するようになっ
ている。冷却器12の後流側の戻り管４と液ポンプ５の上
流側の供給管３とはバイパス回路13によって接続され、
バイパス回路13の戻り管４への接続端の後流側には開閉
弁32が介装されている。A heat exchange tube 12 is provided in a closed vessel 12a of the cooler 12.
b is provided, and cooling water circulates outside this pipe. The return pipe 4 on the downstream side of the cooler 12 and the supply pipe 3 on the upstream side of the liquid pump 5 are connected by a bypass circuit 13,
An on-off valve 32 is interposed on the downstream side of the connection end of the bypass circuit 13 to the return pipe 4.
【００１９】バイパス回路13から分岐した排ガス管22に
は第２のフィルタ24が介装され、この排ガス管22の入口
には開閉弁23が改装され手いる。そして、排ガス管22の
接続部の後流側のバイパス回路13には開閉弁33が介装さ
れている。An exhaust gas pipe 22 branched from the bypass circuit 13 is provided with a second filter 24, and an opening / closing valve 23 is provided at the inlet of the exhaust gas pipe 22. An on-off valve 33 is provided in the bypass circuit 13 on the downstream side of the connection part of the exhaust gas pipe 22.
【００２０】洗浄装置の運転に先立って、冷凍サイクル
の系等の被洗浄物２に充填されている特定フロン及び鉱
油系の冷凍機油を排出する。そして、供給管３の先端を
継手25によって被洗浄物２の入口端に接続し、戻り管４
の先端を継手26によって被洗浄物２の出口端に接続す
る。Prior to the operation of the cleaning apparatus, the specific Freon and mineral oil-based refrigerating machine oil filled in the object to be cleaned 2 such as a refrigerating cycle system are discharged. Then, the leading end of the supply pipe 3 is connected to the inlet end of the article 2 to be cleaned by the joint 25, and the return pipe 4
Is connected to the outlet end of the article to be cleaned 2 by a joint 26.
【００２１】冬季等タンク１内の洗浄剤の温度が低い場
合には先ず予熱運転が実施される。この予熱運転におい
ては、液ポンプ５、加熱器７及び再生ヒータ11が作動せ
しめられるが、冷却器12には冷却水が循環しない。When the temperature of the cleaning agent in the tank 1 is low in winter or the like, a preheating operation is first performed. In this preheating operation, the liquid pump 5, the heater 7, and the regenerative heater 11 are operated, but the cooling water does not circulate in the cooler 12.
【００２２】液ポンプ５を駆動すると、タンク１内に貯
溜されている洗浄剤がフィルタ27を通って供給管３に入
り、液ポンプ５、開閉弁６を経て加熱器７に入り、この
加熱器７を流過する過程で加熱される。When the liquid pump 5 is driven, the cleaning agent stored in the tank 1 enters the supply pipe 3 through the filter 27, enters the heater 7 via the liquid pump 5 and the on-off valve 6, and enters the heater 7. 7 in the process of flowing.
【００２３】次いで、継手25、被洗浄物２、継手26を経
て戻り管４に入り、第１のフィルタ10、流量制御弁29を
経て再生ヒータ11に入る。この再生ヒータ11を流過する
過程で加熱された後、冷却器12の熱交換管12b を単に通
過して開閉弁33を経てバイパス回路13を通って供給管３
に入る。そして、液ポンプ５に吸入されて以後、上記を
繰り返す。Next, it enters the return pipe 4 via the joint 25, the article 2 to be cleaned and the joint 26, and enters the regeneration heater 11 via the first filter 10 and the flow control valve 29. After being heated in the process of flowing through the regenerative heater 11, it simply passes through the heat exchange pipe 12 b of the cooler 12, passes through the on-off valve 33, passes through the bypass circuit 13, and supplies the supply pipe 3.
to go into. Then, after being sucked into the liquid pump 5, the above is repeated.
【００２４】この予熱運転時には開閉弁31、28、18、2
0、32、23は閉とされ、開閉弁６、33及び流量制御弁29
が開とされる。この予熱運転を継続することによって洗
浄剤の温度が所定値に上昇したとき、予熱運転を終了す
る。なお、予熱運転時、再生ヒータ11及び加熱器７のい
ずれか一方のみを作動させることもできる。During the preheating operation, the on-off valves 31, 28, 18, 2
0, 32 and 23 are closed, and the on-off valves 6 and 33 and the flow control valve 29
Is opened. When the temperature of the cleaning agent rises to a predetermined value by continuing the preheating operation, the preheating operation ends. During the preheating operation, only one of the regeneration heater 11 and the heater 7 can be operated.
【００２５】予熱運転が終了したら、洗浄再生運転が実
施される。この洗浄再生運転時には液ポンプ５、再生ヒ
ータ11及び冷却器12が作動せしめられるが、加熱器７は
作動しない。After the completion of the preheating operation, a cleaning and regenerating operation is performed. During this cleaning and regenerating operation, the liquid pump 5, the regenerating heater 11 and the cooler 12 are operated, but the heater 7 is not operated.
【００２６】洗浄再生運転時、液ポンプ５を駆動する
と、タンク１内に貯溜されている洗浄剤がフィルタ27を
通って供給管３に吸入され、液ポンプ５により付勢され
た後、開閉弁６及び加熱器７を流過して継手25を経て被
洗浄物２に入る。In the cleaning regeneration operation, when the liquid pump 5 is driven, the cleaning agent stored in the tank 1 is sucked into the supply pipe 3 through the filter 27 and is urged by the liquid pump 5, and then opened and closed. After passing through the heater 6 and the heater 7, the cleaning object 2 is passed through the joint 25.
【００２７】この洗浄剤は被洗浄物２を流過する過程で
被洗浄物２を洗浄し、この内面に付着して残留している
鉱油系の冷凍機油及び加工油、機械油、金属粉、スケー
ル、スラッジ等からなる異物を溶融、除去する。The cleaning agent cleans the object 2 in the course of flowing through the object 2, and the mineral oil-based refrigerating machine oil and processing oil, machine oil, metal powder, Melts and removes foreign matter consisting of scale, sludge, etc.
【００２８】被洗浄物２を流過した洗浄剤及びこれに伴
われた冷凍機油及び異物は継手26を経て戻り管４に入
り、第１のフィルタ10を流過する過程で異物が捕捉され
ることによって除去される。The cleaning agent that has flowed through the article to be cleaned 2 and the refrigerating machine oil and foreign substances that accompany the cleaning agent enter the return pipe 4 via the joint 26 and are caught in the process of flowing through the first filter 10. Removed by
【００２９】第１のフィルタ10から流出した洗浄剤及び
これに伴われた冷凍機油は流量制御弁29を経て再生ヒー
タ11の密閉容器11a 内に入り、この密閉容器11a 内に一
時的に貯溜されている間にヒータ15によって加熱される
ことによって洗浄剤が蒸発気化し、冷凍機油は密閉容器
11a 内底部に溜まる。The cleaning agent flowing out of the first filter 10 and the refrigerating machine oil accompanying the cleaning agent enter the closed container 11a of the regeneration heater 11 via the flow control valve 29, and are temporarily stored in the closed container 11a. During this time, the cleaning agent is evaporated by being heated by the heater 15, and the refrigerating machine oil is
11a Collected on the inner bottom.
【００３０】再生ヒータ11から流出した洗浄剤は冷却器
12の熱交換管12b 内を流過する過程で管外の冷却水と熱
交換して冷却されることによって凝縮液化する。The cleaning agent flowing out of the regeneration heater 11 is
In the process of flowing through the inside of the 12 heat exchange tubes 12b, heat is exchanged with the cooling water outside the tubes and cooled to condense and liquefy.
【００３１】冷却器12の密閉容器12a の底部から流出し
た液状の洗浄剤は開閉弁32を経てタンク１内に戻る。こ
の洗浄再生運転時、開閉弁31、28、18、20、23、33は閉
とされるが、開閉弁６、32及び流量制御弁29は開とされ
ているThe liquid detergent flowing from the bottom of the closed vessel 12a of the cooler 12 returns to the tank 1 via the on-off valve 32. During the cleaning regeneration operation, the on-off valves 31, 28, 18, 20, 23, and 33 are closed, but the on-off valves 6, 32 and the flow control valve 29 are open.
【００３２】上記洗浄再生運転を継続することによって
再生ヒータ11の密閉容器11a 内底部に所定量の冷凍機油
が溜まった場合には開閉弁18及び20を開く。すると、密
閉容器11a 内の冷凍機油が排油管16に介装されたトラッ
プ17、開閉弁18を経てフィルタ19に入り、このフィルタ
19を流過する過程で冷凍機油中に含まれている異物が捕
捉除去される。そして、フィルタ19から流出した冷凍機
油は開閉弁20を経て油タンク21に入り、ここに貯溜され
る。冷凍機油の排出が終了すれば、開閉弁18及び20は閉
とされる。When a predetermined amount of refrigerating machine oil is accumulated in the inner bottom of the closed vessel 11a of the regenerative heater 11 by continuing the washing / regenerating operation, the on-off valves 18 and 20 are opened. Then, the refrigerating machine oil in the closed container 11a enters the filter 19 via the trap 17 and the opening / closing valve 18 interposed in the oil drain pipe 16, and this filter 19
In the process of flowing through 19, foreign substances contained in the refrigerating machine oil are captured and removed. Then, the refrigerating machine oil flowing out of the filter 19 enters the oil tank 21 via the on-off valve 20, and is stored therein. When the discharge of the refrigerating machine oil is completed, the on-off valves 18 and 20 are closed.
【００３３】この洗浄再生運転時、被洗浄物２から流出
した洗浄剤に含まれる加工油、機械油、金属粉、スケー
ル、スラッジ等からなる異物は第１のフィルタ１０によ
って捕捉されることにより除去され、また、洗浄剤に含
まれる冷凍機油は再生ヒータ11で洗浄剤が蒸発気化する
ことによって洗浄剤から確実に分離される。During the cleaning and regenerating operation, foreign substances such as processing oil, machine oil, metal powder, scale, and sludge contained in the cleaning agent flowing out of the cleaning object 2 are removed by being captured by the first filter 10. Further, the refrigerating machine oil contained in the cleaning agent is surely separated from the cleaning agent by the evaporation of the cleaning agent in the regeneration heater 11.
【００３４】再生ヒータ11及び冷却器12への負荷が能力
を越える場合には、流量制御弁29によってこれを流過す
る流量を絞ることにより再生ヒータ11及び冷却器12の能
力に適合する量とし、開閉弁28を開くことによって余剰
分を開閉弁28、リターン回路14を経てタンク１に戻せば
良い。When the load on the regenerative heater 11 and the cooler 12 exceeds the capacity, the flow rate of the gas flowing through the regenerative heater 11 and the cooler 12 is reduced by the flow control valve 29 so that the amount matches the capacity of the regenerative heater 11 and the cooler 12. By opening the on-off valve 28, the surplus may be returned to the tank 1 via the on-off valve 28 and the return circuit 14.
【００３５】上記洗浄再生運転によって被洗浄物２の系
内が洗浄されたとき、洗浄再生運転を止めて乾燥運転を
実施する。この乾燥運転においては、開閉弁31を開くこ
とによってボンベ９をガス管８、開閉弁31を介して供給
管３に連通させる。そして、加熱器７及び冷却器12を作
動させるが、液ポンプ５及び再生ヒータ11は作動させな
い。When the inside of the system of the article 2 to be cleaned is cleaned by the above-mentioned cleaning and regenerating operation, the cleaning and regenerating operation is stopped and the drying operation is performed. In this drying operation, the cylinder 9 is communicated with the supply pipe 3 via the gas pipe 8 and the on-off valve 31 by opening the on-off valve 31. Then, the heater 7 and the cooler 12 are operated, but the liquid pump 5 and the regeneration heater 11 are not operated.
【００３６】開閉弁31を開くと、ボンベ９内に貯溜され
ている高圧の液化窒素の一部が蒸発気化し、図示しない
圧力調整器で所定の圧力、例えば20kg／cm2に調整され
た後、ガス管８及び開閉弁３１経て供給管３内に流入す
る。When the on-off valve 31 is opened, part of the high-pressure liquefied nitrogen stored in the cylinder 9 evaporates and is adjusted to a predetermined pressure, for example, 20 kg / cm 2 by a pressure regulator (not shown). The gas flows into the supply pipe 3 through the gas pipe 8 and the on-off valve 31.
【００３７】この高圧の窒素ガスは加熱器７を流過する
過程で60℃〜80℃に加熱された後、継手25を経て被洗浄
物２に入り、この被洗浄物２を流過する過程で被洗浄物
２の系内に残留している洗浄剤を蒸発気化せしめる。The high-pressure nitrogen gas is heated to 60 ° C. to 80 ° C. in the course of flowing through the heater 7, enters the article to be cleaned 2 through the joint 25, and flows through the article to be cleaned 2. Then, the cleaning agent remaining in the system of the article to be cleaned 2 is evaporated and vaporized.
【００３８】被洗浄物２を流過した窒素ガス及びこれに
伴われたガス状の洗浄剤は継手26を経て戻り管４に入
り、第１のフィルタ10、流量制御弁29及び再生ヒータ11
を流過して冷却器12に入りその伝熱管12a を流過する過
程で管外の冷却水（約０℃）と熱交換して冷却されるこ
とによりガス状の洗浄剤が凝縮液化し、これによって窒
素ガスから分離される。The nitrogen gas flowing through the article to be cleaned 2 and the gaseous cleaning agent accompanying the nitrogen gas enter the return pipe 4 via the joint 26 and enter the first filter 10, the flow control valve 29 and the regeneration heater 11.
In the process of flowing into the cooler 12 and flowing through the heat transfer tube 12a, heat exchange with cooling water (approximately 0 ° C.) outside the tube causes the gas to be condensed and liquefied. Thereby, it is separated from the nitrogen gas.
【００３９】この窒素ガスはバイパス管13、ガス排出管
22、開閉弁23を経て第２のフィルタ24を流過し、この過
程で第２のフィルタ24に充填された活性炭により窒素ガ
スに伴われたガス状の洗浄剤が吸着されて除去されるの
で、窒素ガスのみが大気中に放出される。そして、窒素
ガスを分離した液状の洗浄剤は開閉弁32を経てタンク１
に戻る。The nitrogen gas is supplied to a bypass pipe 13 and a gas discharge pipe.
22, the gas passes through the second filter 24 via the on-off valve 23, and in this process, the gaseous cleaning agent accompanying the nitrogen gas is adsorbed and removed by the activated carbon filled in the second filter 24. , Only nitrogen gas is released into the atmosphere. Then, the liquid cleaning agent from which the nitrogen gas has been separated passes through the on-off valve 32 to the tank 1.
Return to
【００４０】この乾燥運転時、開閉弁31、23、32、流量
制御弁29は開とされるが、開閉弁６、28、18、20、33は
閉とされている。During this drying operation, the opening / closing valves 31, 23, 32 and the flow control valve 29 are opened, while the opening / closing valves 6, 28, 18, 20, 33 are closed.
【００４１】この乾燥運転によって被洗浄物２の内面に
付着して残留している洗浄剤は高温の窒素ガスで加熱さ
れることにより効果的に蒸発して窒素ガスに伴われて排
出され、かつ、冷却器12で冷却されて凝縮液化すること
によって窒素ガスから確実に分離されるので、タンク１
内には再生された洗浄剤のみが戻る。By the drying operation, the cleaning agent remaining on the inner surface of the article 2 to be cleaned is heated by the high-temperature nitrogen gas to be effectively evaporated and discharged with the nitrogen gas. Is cooled by the cooler 12 and condensed and liquefied, so that it is reliably separated from the nitrogen gas.
Inside, only the regenerated cleaning agent returns.
【００４２】洗浄剤は被洗浄物２の系内に付着残留して
いる鉱油系の冷凍機油及び異物を効果的に溶融して除去
することができるものであって、不燃性、低毒性、低腐
食性、安全性、速乾性に富み、オゾン層の破壊に関与せ
ず、かつ、地球温暖化係数が極めて小さいもの、例え
ば、代替冷媒の一種であるＨＦＣ43−10mee （トランス
１、２−ディクロロエチレン) とメタノールとの共沸混
合物からなるバートレルＳＭＴ（デュポン−三井フロロ
ケミカル社の商標）等が望ましい。The cleaning agent is capable of effectively melting and removing mineral oil-based refrigerating machine oil and foreign substances adhering and remaining in the system of the article 2 to be cleaned, and is nonflammable, low toxic, low in toxicity. Highly corrosive, safe, fast-drying, not involved in the destruction of the ozone layer, and having a very low global warming potential, such as HFC43-10mee (trans 1,2-dichloro Vertrel SMT (trademark of DuPont-Mitsui Fluorochemicals) comprising an azeotropic mixture of ethylene and methanol is desirable.
【００４３】図示の実施形態においては、ボンベ９内に
貯溜されている液化窒素をガス化させて所定の圧力に調
整した後、供給管３内に導入しているが、これに代えて
露点が−30℃以下のドライエアその他の不活性ガスを用
いることができる。In the illustrated embodiment, the liquefied nitrogen stored in the cylinder 9 is gasified and adjusted to a predetermined pressure, and then introduced into the supply pipe 3, but instead the dew point is changed. Dry air of -30 ° C or lower or other inert gas can be used.
【００４４】また、上記実施形態においては、スライダ
ック式ヒータを用いているが、再生ヒータ11及び加熱器
７は加熱量を任意に加減しうるものであれば如何なる形
式、構造のものであっても良い。In the above-described embodiment, the reslidable heater is used. However, the regenerative heater 11 and the heater 7 may be of any type and structure as long as the heating amount can be arbitrarily adjusted. good.
【００４５】また、冷却器12は水冷式冷却器を用いてい
るが、洗浄剤のガスを凝縮液化させうるものであれば、
任意の形式、構造のものを用いることができる。The water cooler 12 is a water-cooled cooler. However, if the cooler 12 can condense and liquefy the gas of the cleaning agent,
Any type and structure can be used.
【００４６】更に、上記実施形態においては、再生ヒー
タ11で洗浄剤と冷凍機油とを加熱することによって分離
しているが、再生ヒータ11の後流側に分離器を設けてこ
こで洗浄剤と冷凍機油を分離することができる。Further, in the above embodiment, the cleaning agent and the refrigerating machine oil are separated by heating with the regenerating heater 11, but a separator is provided downstream of the regenerating heater 11 so that the cleaning agent and the refrigerating machine oil are separated from each other. Refrigeration oil can be separated.
【００４７】更に、冷却器12でガス状の洗浄剤を冷却し
て凝縮液化させることによって不活性ガスを分離してい
るが、冷却器12の後流側に分離器を設けてここで液状の
洗浄剤から不活性ガスを分離することができる。Further, the inert gas is separated by cooling and condensing and liquefying the gaseous cleaning agent in the cooler 12, but a separator is provided on the downstream side of the cooler 12 so that the liquid gas is removed. Inert gas can be separated from the cleaning agent.
【００４８】更に、第１のフィルタ10は被洗浄物２の出
口の戻り管４に介装されているが、タンク１の入口の戻
り管４に介装することもできる。Further, the first filter 10 is interposed in the return pipe 4 at the outlet of the object 2 to be cleaned, but may be interposed in the return pipe 4 at the inlet of the tank 1.
【００４９】更に、被洗浄物２は冷凍サイクルの冷媒が
循環する全ての機器、配管であっても良いが、冷媒圧縮
機、モジュレータ、レシーバ、リザーブタンク、アキュ
ムレータ、膨張弁等の機器を予め取り外してこれに代わ
る接続配管を介して接続してなる配管系、または、これ
ら機器をバイパス管でバイパスさせるように接続してな
る配管系から構成することもできる。Further, the object to be cleaned 2 may be all devices and pipes in which the refrigerant of the refrigeration cycle circulates, but devices such as a refrigerant compressor, a modulator, a receiver, a reserve tank, an accumulator, an expansion valve and the like are removed in advance. Alternatively, it may be constituted by a piping system connected via a connecting pipe instead of this, or a piping system connected by bypassing these devices by a bypass pipe.
【００５０】[0050]
【発明の効果】本発明においては、洗浄再生運転時、被
洗浄物から流出した洗浄剤及び冷凍機油は再生ヒータで
加熱されることにより洗浄剤が蒸発するので、冷凍機油
を洗浄剤から効果的に分離できる。そして、再生ヒータ
から流出した洗浄剤のガスは冷却器で冷却されることに
より凝縮液化して再生されるので、タンク内の洗浄剤を
清浄な状態に維持できる。According to the present invention, during the cleaning and regenerating operation, the cleaning agent and the refrigerating machine oil flowing out of the object to be cleaned are heated by the regenerating heater to evaporate the cleaning agent, so that the refrigerating machine oil is effectively removed from the cleaning agent. Can be separated. Then, the cleaning agent gas flowing out of the regeneration heater is condensed and liquefied by being cooled by the cooler and is regenerated, so that the cleaning agent in the tank can be maintained in a clean state.
【００５１】更に、乾燥運転時、供給管に導入された不
活性ガスを加熱器で加熱した後、被洗浄物内を流過させ
るので、被洗浄物内に残留している洗浄剤を蒸発気化さ
せて効果的に除去することができる。そして、被洗浄物
から流出した洗浄剤は冷却器で冷却されることにより凝
縮液化して再生されので、タンク内の洗浄剤を清浄な状
態に維持できる。Further, during the drying operation, the inert gas introduced into the supply pipe is heated by the heater and then flows through the object to be cleaned, so that the cleaning agent remaining in the object to be cleaned is evaporated and vaporized. And can be effectively removed. Then, the cleaning agent flowing out of the object to be cleaned is condensed and liquefied by being cooled by the cooler and regenerated, so that the cleaning agent in the tank can be maintained in a clean state.
【００５２】再生ヒータ及び冷却器に対して並列にこれ
をバイパスするリターン回路を接続し、かつ、これら再
生ヒータ及び冷却器を流過する洗浄剤の流量を調整する
手段を設ければ、再生ヒータ及び冷却器の能力を十分に
発揮させることができるとともにこれらに過大な負荷を
掛けることがない。If a return circuit for bypassing the regeneration heater and the cooler is connected in parallel to the regeneration heater and the cooler, and a means for adjusting the flow rate of the cleaning agent flowing through the regeneration heater and the cooler is provided, the regeneration heater is provided. In addition, the capacity of the cooler can be sufficiently exhibited, and an excessive load is not applied to these.
【００５３】冷却器を流過した洗浄剤をタンクをバイパ
スして供給管に導入するバイパス回路を設ければ、この
バイパス回路を経て循環する洗浄剤を加熱器及び又は再
生ヒータで加熱して洗浄剤の温度を上昇させることがで
きるので、洗浄剤の洗浄能力を十分に発揮させることが
できる。If a bypass circuit is provided for introducing the cleaning agent flowing through the cooler to the supply pipe by bypassing the tank, the cleaning agent circulating through the bypass circuit is heated by a heater and / or a regeneration heater to perform cleaning. Since the temperature of the cleaning agent can be increased, the cleaning ability of the cleaning agent can be sufficiently exhibited.
【００５４】被洗浄物の出口又はタンクの入口の戻り管
に被洗浄物から取り除けられた異物を捕捉するための第
１のフィルタを介装すれば、この異物を第１のフィルタ
によって捕捉除去することができるので、異物がタンク
内に入るのを阻止できる。If a first filter for catching foreign matter removed from the article to be washed is interposed in the outlet of the article to be washed or the return pipe at the entrance of the tank, the foreign matter is captured and removed by the first filter. Therefore, foreign matter can be prevented from entering the tank.
【００５５】更に、冷却器を流過した洗浄剤から分離さ
れた不活性ガスを大気に放出するガス排出管に不活性ガ
ス中に含まれる洗浄剤を捕捉する第２のフィルタを介装
すれば、洗浄剤が不活性ガスに伴われて大気中に放出さ
れることがないので、地球環境を汚染することはないと
ともに作業場を常時清潔に維持することができる。Further, if a second filter for capturing the cleaning agent contained in the inert gas is interposed in a gas discharge pipe for releasing the inert gas separated from the cleaning agent flowing through the cooler to the atmosphere. Since the cleaning agent is not released into the atmosphere due to the inert gas, it does not pollute the global environment and can keep the work place clean at all times.
【図１】本発明の実施形態を示す系統図である。FIG. 1 is a system diagram showing an embodiment of the present invention.
【符号の説明】 １ タンク ２ 被洗浄物 ３ 供給管 ５ 液ポンプ ７ 加熱器 ４ 戻り管 10 第１のフィルタ 11 再生ヒータ 11a 密閉容器 15 ヒータ 12 冷却器 12a 密閉容器 12b 熱交換管 16 排油管 17 トラップ 19 フィルタ 21 油タンク 22 排ガス管 24 第２のフィルタ 25、26 継手 27 フィルタ 29 流量制御弁 ９ ボンベ ８ ガス管 13 バイパス回路 14 リターン回路 ６、18、20、23、28、31、32、33 開閉弁[Description of Signs] 1 Tank 2 Object to be cleaned 3 Supply pipe 5 Liquid pump 7 Heater 4 Return pipe 10 First filter 11 Regeneration heater 11a Closed vessel 15 Heater 12 Cooler 12a Closed vessel 12b Heat exchange pipe 16 Oil drain pipe 17 Trap 19 Filter 21 Oil tank 22 Exhaust gas pipe 24 Second filter 25, 26 Fitting 27 Filter 29 Flow control valve 9 Cylinder 8 Gas pipe 13 Bypass circuit 14 Return circuit 6, 18, 20, 23, 28, 31, 32, 33 On-off valve
Claims (5)
凍サイクル等の被洗浄物に移送する供給管に不活性ガス
の導入管を接続するとともにこの導入管の接続部の後流
側に加熱器を介装し、かつ、上記被洗浄物を流過した洗
浄剤を上記タンクに戻す戻り管に再生ヒータとこの再生
ヒータの後流側に冷却器を介装したことを特徴とする冷
凍サイクル等の洗浄装置。An inert gas introduction pipe is connected to a supply pipe for transferring a liquid cleaning agent stored in a tank to an object to be cleaned such as a refrigeration cycle, and a downstream side of a connection portion of the introduction pipe. A refrigerating heater having a heater interposed therebetween and a regenerative heater provided on a return pipe for returning the cleaning agent having passed the object to be washed back to the tank, and a cooler interposed on the downstream side of the regenerative heater. Cleaning equipment such as cycle.
にこれらをバイパスするリターン回路を接続し、かつ、
上記再生ヒータ及び冷却器を流過する洗浄剤の流量を調
節する手段を設けたことを特徴とする請求項１記載の冷
凍サイクル等の洗浄装置。2. A return circuit for bypassing the regenerative heater and the cooler is connected in parallel to the regenerative heater and the cooler, and
2. The cleaning apparatus for a refrigeration cycle or the like according to claim 1, further comprising means for adjusting a flow rate of the cleaning agent flowing through the regeneration heater and the cooler.
クをバイパスして上記供給管に導入するバイパス回路を
設けたことを特徴とする請求項１及び２記載の冷凍サイ
クル等の洗浄装置。3. A cleaning device for a refrigeration cycle or the like according to claim 1, further comprising a bypass circuit for introducing the cleaning agent flowing through the cooler into the supply pipe by bypassing the tank. .
口の戻り管に上記被洗浄物から取り除けられた異物を捕
捉するための第１のフィルタを介装したことを特徴とす
る請求項１ないし３記載の冷凍サイクルの洗浄装置。4. The apparatus according to claim 1, wherein a first filter for catching foreign matter removed from the object to be cleaned is interposed in an outlet of the object to be cleaned or a return pipe at an inlet of the tank. 4. The cleaning device for a refrigeration cycle according to any one of claims 3 to 3.
れた不活性ガスを大気に放出するガス排出管に不活性ガ
ス中に含まれる洗浄剤を捕捉する第２のフィルタを介装
したことを特徴とする請求項１ないし４記載の冷凍サイ
クルの洗浄装置。5. A second filter for trapping a cleaning agent contained in an inert gas is interposed in a gas discharge pipe for releasing an inert gas separated from the cleaning agent flowing through the cooler to the atmosphere. 5. The refrigeration cycle cleaning apparatus according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36233799A JP3354124B2 (en) | 1999-12-21 | 1999-12-21 | Cleaning equipment such as refrigeration cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36233799A JP3354124B2 (en) | 1999-12-21 | 1999-12-21 | Cleaning equipment such as refrigeration cycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001174111A true JP2001174111A (en) | 2001-06-29 |
| JP3354124B2 JP3354124B2 (en) | 2002-12-09 |
Family
ID=18476598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36233799A Expired - Fee Related JP3354124B2 (en) | 1999-12-21 | 1999-12-21 | Cleaning equipment such as refrigeration cycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3354124B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004059225A1 (en) * | 2002-12-26 | 2004-07-15 | Arçelik A.S. | Declogging device and declogging method |
| JP2010038511A (en) * | 2008-08-08 | 2010-02-18 | Hideaki Sodeyama | Cleaning method and cleaning device of refrigerant pipe |
-
1999
- 1999-12-21 JP JP36233799A patent/JP3354124B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004059225A1 (en) * | 2002-12-26 | 2004-07-15 | Arçelik A.S. | Declogging device and declogging method |
| US7707839B2 (en) | 2002-12-26 | 2010-05-04 | Gurol Altunan | Declogging device and declogging method |
| JP2010038511A (en) * | 2008-08-08 | 2010-02-18 | Hideaki Sodeyama | Cleaning method and cleaning device of refrigerant pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3354124B2 (en) | 2002-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7174742B2 (en) | Combined method and apparatus for recovering and reclaiming refrigerant, solvent flushing, and refrigerant recharging | |
| US6510698B2 (en) | Refrigeration system, and method of updating and operating the same | |
| US20060234896A1 (en) | Flushing for refrigeration system components | |
| WO1999013279A1 (en) | Apparatus and method for cleaning pipes of refrigerating unit | |
| JP2001116408A (en) | Cleaning device for refrigerating cycle | |
| JP3354124B2 (en) | Cleaning equipment such as refrigeration cycle | |
| JP3361771B2 (en) | Operation method of refrigeration cycle device | |
| JP3361765B2 (en) | Refrigeration cycle apparatus, method of forming the same, and outdoor unit of refrigeration cycle apparatus | |
| JP4391559B2 (en) | Refrigerant changing method of refrigerant circuit for refrigeration apparatus and refrigeration apparatus | |
| JP2001201215A (en) | Method and apparatus for removing refrigerating machine oil | |
| JP2593403B2 (en) | Cleaning equipment for refrigeration or cooling cycle | |
| JP2004270974A (en) | Method for changing refrigerant in refrigerant circuit for freezing and refrigerating device | |
| US6877337B2 (en) | Product for the cleaning of refrigeration installations, method and device for purging of the same | |
| JP4409075B2 (en) | Cleaning operation method of refrigeration cycle apparatus | |
| JP2001124420A (en) | Refrigerating and air-conditioning device and method of renewal of the same | |
| KR101999391B1 (en) | refrigerant pipe cleaning equipment and cleaning method using the same | |
| JP4176413B2 (en) | Operation method of refrigeration cycle apparatus | |
| JP3370959B2 (en) | Renewal method and operation method of refrigeration cycle device | |
| JPH04198676A (en) | Refrigerant system washing device | |
| JP4425457B2 (en) | Refrigeration cycle apparatus and operation method thereof | |
| JPH09303908A (en) | Cleaning device of freezing cycle pipe | |
| JP2008036595A (en) | Solvent washing apparatus provided with solvent recovery apparatus | |
| KR100401084B1 (en) | Thermal storage air conditioner | |
| JP4760119B2 (en) | Pipe cleaning method and refrigeration cycle apparatus | |
| JPH0875323A (en) | Refrigerating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |