JPH05141671A - Method for cleaning pump cistern and circulation type hot water circuit - Google Patents

Method for cleaning pump cistern and circulation type hot water circuit

Info

Publication number
JPH05141671A
JPH05141671A JP30637791A JP30637791A JPH05141671A JP H05141671 A JPH05141671 A JP H05141671A JP 30637791 A JP30637791 A JP 30637791A JP 30637791 A JP30637791 A JP 30637791A JP H05141671 A JPH05141671 A JP H05141671A
Authority
JP
Japan
Prior art keywords
hot water
pump
water circuit
pump system
circulation type
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.)
Withdrawn
Application number
JP30637791A
Other languages
Japanese (ja)
Inventor
Hideyuki Nakajima
秀之 中島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanden Corp
Original Assignee
Sanden Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanden Corp filed Critical Sanden Corp
Priority to JP30637791A priority Critical patent/JPH05141671A/en
Publication of JPH05141671A publication Critical patent/JPH05141671A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To facilitate cleaning within a circulation type hot water circuit by a method wherein non-freezing liquid stored in a liquid storing tank and fed out by a pump is filtered and a filter for trapping some irregular objects in the non-freezing liquid is installed in a main body of a pump cistern. CONSTITUTION:A pump cistern 1 is connected to a circulation type hot water circuit 10 in such a way as non-freezing liquid 6 discharged from a pump cistern 1 by a pump 5 circulates throughout the circulation type hot water circuit 10 and returns to the pump cistern 1 and then the non-freezing liquid 6 is circulated between the pump cistern 1 and the circulation type hot water circuit 10. In this case, since the pump cistern 1 is provided with a filter 4, some irregular objects such as flux or the like in the circulation type hot water circuit 10 are trapped by the filter 4. With such an arrangement, it is possible to perform easily a cleaning within the circulation type hot water circuit 10.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ポンプシスターン、及
びこのポンプシスターンを利用した循環式温水回路の洗
浄方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump system and a method for cleaning a circulating hot water circuit using the pump system.

【0002】[0002]

【従来の技術】温水暖房回路、温水式融雪回路等の循環
式温水回路は、図6に示すように、温水ボイラ11と、
循環ポンプ12と、放熱器13とを含んでいる。温水ボ
イラ11は、缶体20と、この缶体20内の不凍液を加
熱するバーナ21と、缶体20内でバーナ21により加
熱された不凍液の膨脹分を吸収する密閉膨脹タンク22
とで構成されている。缶体20には、給水口兼排水口3
0、安全弁31、流入管32、及び流出管33が備えら
れている。缶体20の流出管33は、循環ポンプ12の
吸入側に接続されている。循環ポンプ12の吐出側は、
放熱器13の流入側に接続されている。放熱器13の流
出側は、缶体20の流入管32に接続されている。
2. Description of the Related Art As shown in FIG. 6, a circulating hot water circuit such as a hot water heating circuit and a hot water snow melting circuit is provided with a hot water boiler 11.
It includes a circulation pump 12 and a radiator 13. The hot water boiler 11 includes a can body 20, a burner 21 that heats the antifreeze liquid in the can body 20, and a closed expansion tank 22 that absorbs the expansion of the antifreeze liquid heated by the burner 21 in the can body 20.
It consists of and. The can body 20 has a water supply port 3 and a drain port 3
0, a safety valve 31, an inflow pipe 32, and an outflow pipe 33 are provided. The outflow pipe 33 of the can body 20 is connected to the suction side of the circulation pump 12. The discharge side of the circulation pump 12 is
It is connected to the inflow side of the radiator 13. The outflow side of the radiator 13 is connected to the inflow pipe 32 of the can body 20.

【0003】循環式温水回路は、その設置場所にて、温
水ボイラ、循環ポンプ、放熱器等の据付が別々になさ
れ、そして、これら循環式温水回路の構成部品間の配管
を行うことにより構成される。この温水配管工事終了
後、ポンプシスターンから吐出された不凍液が循環式温
水回路内を一巡してポンプシスターンに戻るように、ポ
ンプシスターンが循環式温水回路に接続される。そし
て、ポンプシスターンと循環式温水回路との間で不凍液
を循環させて、循環式温水回路内に不凍液を充填する共
に、循環式温水回路内のエア抜きを行っている。
The circulating hot water circuit is constructed by separately installing hot water boilers, circulating pumps, radiators, etc. at the installation location, and by connecting piping between the components of these circulating hot water circuits. It After the completion of this hot water piping work, the pump systern is connected to the circulating hot water circuit so that the antifreeze liquid discharged from the pump systern makes a round in the circulating hot water circuit and returns to the pump systern. Then, the antifreeze liquid is circulated between the pump system turn and the circulating hot water circuit to fill the antifreeze liquid in the circulating hot water circuit, and at the same time, the air in the circulating hot water circuit is released.

【0004】このように、循環式温水回路内に不凍液を
循環させるポンプシスターンは、従来、ポンプシスター
ン本体と、このポンプシスターン本体内に配置された貯
液槽と、ポンプシスターン本体内に設けられ貯液槽に接
続されたポンプとを含んでいる。
As described above, the pump system which circulates the antifreeze liquid in the circulating hot water circuit has conventionally been provided with a pump system main body, a liquid storage tank disposed in the pump system main body, and a pump system provided in the pump system main body. And a pump connected to the liquid tank.

【0005】[0005]

【発明が解決しようとする課題】上述の温水配管工事終
了時、循環式温水回路内には、銅配管をろう付けする際
に使用するフラックスやごみ等の異物が残っている。こ
の為、不凍液を循環式温水回路内に充填する前に、循環
式温水回路内を洗浄する必要がある。しかしながら、実
際には、循環式温水回路内の洗浄は殆ど行われていな
い。この為、循環式温水回路内にフィルタを組み込み、
このフィルタで異物を捕捉する方法もある。しかしなが
ら、この場合、フィルタのメンテナンスを行うことがで
きず、フィルタが目詰まりする不都合が生じたり、一
方、フィルタの圧損が大きい為、循環ポンプを能力の大
きいものにしなければならず、この結果、消費電力の増
大や騒音の問題が生じた。
At the end of the hot water piping work described above, foreign substances such as flux and dust used for brazing copper piping remain in the circulating hot water circuit. Therefore, it is necessary to clean the inside of the circulating hot water circuit before filling the circulating hot water circuit with the antifreeze liquid. However, in practice, the cleaning of the circulating hot water circuit is hardly performed. Therefore, a filter is installed in the circulating hot water circuit,
There is also a method of capturing foreign matter with this filter. However, in this case, the maintenance of the filter cannot be performed, and the inconvenience may occur in which the filter is clogged. On the other hand, since the pressure loss of the filter is large, the circulation pump must have a large capacity. There were problems of increased power consumption and noise.

【0006】それ故、本発明の課題は、循環式温水回路
内の洗浄を容易に行うことができる装置及び循環式温水
回路内を容易に洗浄することができる方法を提供するこ
とにある。
Therefore, an object of the present invention is to provide an apparatus capable of easily cleaning the inside of the circulating hot water circuit and a method capable of easily cleaning the inside of the circulating hot water circuit.

【0007】[0007]

【課題を解決するための手段】本発明によれば、ポンプ
シスターン本体と、該ポンプシスターン本体内に配置さ
れた貯液槽と、上記ポンプシスターン本体内に設けられ
上記貯液槽に接続されたポンプとを含むポンプシスター
ンにおいて、上記貯液槽に貯えられ上記ポンプによって
送出される不凍液を濾過し、該不凍液中の異物を捕捉す
るフィルタを上記ポンプシスターン本体内に設けたこと
を特徴とするポンプシスターンが得られる。
According to the present invention, a pump system turn main body, a liquid storage tank disposed in the pump system turn main body, and a liquid storage tank provided in the pump system turn body are connected to the liquid storage tank. A pump system including a pump, characterized in that a filter for filtering the antifreeze liquid stored in the liquid storage tank and delivered by the pump and trapping foreign matter in the antifreeze liquid is provided in the pump system turn body. You get a cistern.

【0008】また、本発明によれば、請求項1記載のポ
ンプシスターンを循環式温水回路に接続して、上記ポン
プシスターンから吐出された不凍液が上記循環式温水回
路内を一巡して上記ポンプシスターンに戻る循環回路を
構成し、上記ポンプシスターンと上記循環式温水回路と
の間で不凍液を循環させ、この際に上記ポンプシスター
ンに備えられた上記フィルタにより上記循環式温水回路
内の異物を捕捉して上記循環式温水回路内を洗浄するこ
とを特徴とする循環式温水回路の洗浄方法が得られる。
Further, according to the present invention, the pump systern according to claim 1 is connected to a circulation type hot water circuit, and the antifreeze discharged from the pump systern makes one round in the circulation type hot water circuit to make the pump systern. A circulation circuit is configured to circulate the antifreeze liquid between the pump system turn and the circulation type hot water circuit, and at this time, the filter provided in the pump system turn captures foreign matter in the circulation type hot water circuit. The method for cleaning a circulating hot water circuit is characterized in that the inside of the circulating hot water circuit is cleaned.

【0009】[0009]

【作用】先ず、本発明のポンプシスターンから吐出され
た不凍液が循環式温水回路内を一巡してポンプシスター
ンに戻るように、ポンプシスターンを循環式温水回路に
接続する。次に、ポンプシスターンと循環式温水回路と
の間で不凍液を循環させる。この際、ポンプシスターン
には、フィルタが備えられているので、このフィルタに
より循環式温水回路内のフラックス等の異物が捕捉され
る。この結果、従来と全く同じ作業を行うだけで循環式
温水回路内が洗浄される。
First, the pump cistern is connected to the circulation hot water circuit so that the antifreeze liquid discharged from the pump cistern of the present invention makes a circuit in the circulation hot water circuit and returns to the pump cistern. Next, the antifreeze liquid is circulated between the pump system turn and the circulating hot water circuit. At this time, since the pump system turn is provided with a filter, foreign matter such as flux in the circulating hot water circuit is captured by the filter. As a result, the inside of the circulating hot water circuit is cleaned by performing exactly the same work as in the conventional case.

【0010】[0010]

【実施例】図1は本発明の一実施例によるポンプシスタ
ーンの使用状態を示す断面図である。
FIG. 1 is a sectional view showing a usage state of a pump system turn according to an embodiment of the present invention.

【0011】図1を参照して、ポンプシスターン1は、
ポンプシスターン本体2と、貯液槽3と、フィルタ4
と、ポンプ5とから成る。貯液槽3は、ポンプシスター
ン本体2の上部に配置されている。貯液槽3には、不凍
液6が貯えられる。フィルタ4は、ポンプシスターン本
体2の下部に配置され、その流入側は、ポンプシスター
ン本体2の底部に接続されている。フィルタ4は、着脱
可能に成っている。ポンプ5は、ポンプシスターン本体
2の下部に配置され、その吸入側は、フィルタ4の流出
側に接続され、その吐出側は、ポンプシスターン本体2
の側壁面から突出している。
Referring to FIG. 1, the pump systern 1 is
Pump system main body 2, liquid storage tank 3, filter 4
And a pump 5. The liquid storage tank 3 is arranged above the pump systern body 2. The antifreeze liquid 6 is stored in the liquid storage tank 3. The filter 4 is arranged in the lower portion of the pump system main body 2, and its inflow side is connected to the bottom of the pump system main body 2. The filter 4 is removable. The pump 5 is arranged below the pump system main body 2, its suction side is connected to the outflow side of the filter 4, and its discharge side is the pump system main body 2.
Protruding from the side wall surface.

【0012】循環式温水回路10は、温水ボイラ11
と、循環ポンプ12と、放熱器(図示せず)とを含んで
いる。温水ボイラ11は、缶体20と、この缶体20内
の不凍液を加熱するバーナ21と、缶体20内でバーナ
21により加熱された不凍液の膨脹分を吸収する密閉膨
脹タンク22とで構成されている。缶体20には、給水
口兼排水口30、安全弁31、流入管32、及び流出管
33が備えられている。流入管32には、圧力計34及
びバルブ35が取り付けられている。このバルブ35の
放熱器側部分には、捨てバルブ36が取り付けられてい
る。缶体20の流出管33は、循環ポンプ12の吸入側
に接続されている。循環ポンプ12の吐出側は、放熱器
の流入側に接続されている。放熱器の流出側は、缶体2
0の流入管32に取り付けられたバルブ35に接続され
ている。
The circulating hot water circuit 10 includes a hot water boiler 11
, A circulation pump 12, and a radiator (not shown). The hot water boiler 11 includes a can body 20, a burner 21 that heats the antifreeze liquid in the can body 20, and a closed expansion tank 22 that absorbs the expansion of the antifreeze liquid heated by the burner 21 in the can body 20. ing. The can body 20 is provided with a water supply / drainage port 30, a safety valve 31, an inflow pipe 32, and an outflow pipe 33. A pressure gauge 34 and a valve 35 are attached to the inflow pipe 32. A discard valve 36 is attached to the radiator side portion of the valve 35. The outflow pipe 33 of the can body 20 is connected to the suction side of the circulation pump 12. The discharge side of the circulation pump 12 is connected to the inflow side of the radiator. The outflow side of the radiator is the can body 2
0 is connected to a valve 35 attached to the inflow pipe 32.

【0013】本実施例の場合、ポンプシスターン1に備
えられたポンプ5の吐出側と、循環式温水回路10に備
えられた給水口兼排水口30とがパイプ40により接続
されている。また、捨てバルブ36にパイプ41の一端
が接続され、このパイプ41の他端が、貯液槽3に臨む
ようにしてポンプシスターン1に接続されている。これ
により、ポンプシスターン1から吐出された不凍液6が
循環式温水回路10内を一巡してポンプシスターン1に
戻る循環回路が構成されている。そして、ポンプシスタ
ーン1と循環式温水回路10との間で不凍液6を循環さ
せることにより、ポンプシスターン1に備えられたフィ
ルタ4によって循環式温水回路10内の異物が捕捉さ
れ、循環式温水回路10内が洗浄される。
In the case of the present embodiment, the discharge side of the pump 5 provided in the pump systern 1 and the water supply / drainage port 30 provided in the circulating hot water circuit 10 are connected by a pipe 40. Further, one end of a pipe 41 is connected to the discard valve 36, and the other end of the pipe 41 is connected to the pump system 1 so as to face the liquid storage tank 3. As a result, a circulation circuit is formed in which the antifreeze liquid 6 discharged from the pump system turn 1 makes one circuit in the circulating hot water circuit 10 and returns to the pump system turn 1. Then, by circulating the antifreeze liquid 6 between the pump system turn 1 and the circulation type hot water circuit 10, foreign matters in the circulation type hot water circuit 10 are captured by the filter 4 provided in the pump system turn 1, and the circulation type hot water circuit 10 The inside is washed.

【0014】図2は本発明の他の実施例によるポンプシ
スターンの断面図である。
FIG. 2 is a sectional view of a pump system turn according to another embodiment of the present invention.

【0015】図2を参照して、本実施例のポンプシスタ
ーン1も、ポンプシスターン本体2と、貯液槽3と、フ
ィルタ4と、ポンプ5とから成る。しかし、本実施例の
場合、フィルタ4は、貯液槽3内の上部に配置されてお
り、循環式温水回路から戻ってきた不凍液は、直接フィ
ルタ4に流入し、ここで異物が捕捉され、貯液槽3に貯
えられるように成っている。一方、ポンプ5の吸入側
は、直接、貯液槽3の底部に接続されている。これらの
部分以外は、図1に示す実施例と同じである。
Referring to FIG. 2, the pump system turn 1 of this embodiment also comprises a pump system turn body 2, a liquid storage tank 3, a filter 4, and a pump 5. However, in the case of the present embodiment, the filter 4 is arranged in the upper part of the liquid storage tank 3, and the antifreeze liquid returned from the circulating hot water circuit directly flows into the filter 4 where foreign matter is captured, It can be stored in the liquid storage tank 3. On the other hand, the suction side of the pump 5 is directly connected to the bottom of the liquid storage tank 3. Except for these portions, it is the same as the embodiment shown in FIG.

【0016】尚、ポンプシスターンと循環式温水回路の
接続方法は、図1に示すもの限られず、図3乃至図5に
示すように接続しても構わない。
The method of connecting the pump systern and the circulating hot water circuit is not limited to that shown in FIG. 1, but may be connected as shown in FIGS. 3 to 5.

【0017】図3に示す接続方法の場合、パイプ40
で、ポンプシスターン1に備えられたポンプ5の吐出側
と、循環式温水回路10の給水口兼排水口30とを接続
し、一方、パイプ41で、循環式温水回路10の安全弁
31とポンプシスターン1の貯液槽3とを接続してあ
る。
In the case of the connection method shown in FIG. 3, the pipe 40
Then, the discharge side of the pump 5 provided in the pump systern 1 is connected to the water supply port / drainage port 30 of the circulating hot water circuit 10, while the pipe 41 is used to connect the safety valve 31 of the circulating hot water circuit 10 and the pump systern. It is connected to the liquid storage tank 3 of No. 1.

【0018】図4に示す接続方法の場合、パイプ40
で、ポンプシスターン1に備えられたポンプ5の吐出側
と、循環式温水回路10に備えられた捨てバルブ36と
を接続し、一方、パイプ41で、循環式温水回路10の
安全弁31と、ポンプシスターン1の貯液槽3とを接続
してある。この場合、不凍液は、循環式温水回路10の
運転時の不凍液の流れと逆方向で循環式温水回路10内
を一巡する。
In the case of the connection method shown in FIG. 4, the pipe 40
Then, the discharge side of the pump 5 provided in the pump system 1 is connected to the discard valve 36 provided in the circulating hot water circuit 10, while the pipe 41 is used to connect the safety valve 31 of the circulating hot water circuit 10 and the pump. It is connected to the liquid storage tank 3 of the cistern 1. In this case, the antifreeze circulates in the circulating hot water circuit 10 in the opposite direction to the flow of the antifreeze when the circulating hot water circuit 10 is operating.

【0019】図5に示す接続方法の場合、循環式温水回
路10に備えられた循環ポンプ12の吐出側にバルブ3
7が取り付けられ、更に、バルブ37の放熱器側に捨て
バルブ38が接続されている。そして、パイプ40で、
ポンプシスターン1に備えられたポンプ5の吐出側と、
循環式温水回路10に備えられた捨てバルブ38とを接
続し、一方、パイプ41で、循環式温水回路10の安全
弁31と、ポンプシスターン1の貯液槽3とを接続して
ある。そして、バルブ37は閉で、捨てバルブ38は開
と成っている。
In the case of the connection method shown in FIG. 5, the valve 3 is provided on the discharge side of the circulation pump 12 provided in the circulation type hot water circuit 10.
7 is attached, and a discard valve 38 is connected to the radiator side of the valve 37. And with the pipe 40,
The discharge side of the pump 5 provided in the pump system turn 1,
The waste valve 38 provided in the circulating hot water circuit 10 is connected, while the pipe 41 connects the safety valve 31 of the circulating hot water circuit 10 and the liquid storage tank 3 of the pump system turn 1. The valve 37 is closed and the discard valve 38 is open.

【0020】[0020]

【発明の効果】本発明のポンプシスターンは、不凍液の
充填作業並びにエア抜き作業をする際に、循環式温水回
路内の異物を捕捉することができる。
The pump system according to the present invention is capable of capturing foreign matter in the circulating hot water circuit during the antifreeze liquid filling operation and the air bleeding operation.

【0021】また、本発明による循環式温水回路の洗浄
方法は、従来通りに、ポンプシスターンによって不凍液
の充填作業並びにエア抜き作業をするだけで、循環式温
水回路内を洗浄し、異物を捕捉することができる。
Further, in the method for cleaning the circulating hot water circuit according to the present invention, the inside of the circulating hot water circuit is cleaned and foreign matters are trapped by simply performing the filling operation of the antifreeze liquid and the air bleeding operation by the pump cistern in the conventional manner. be able to.

【図面の簡単な説明】[Brief description of drawings]

【図1】図1は本発明の一実施例によるポンプシスター
ンの使用状態を示す断面図である。
FIG. 1 is a sectional view showing a usage state of a pump system turn according to an embodiment of the present invention.

【図2】図2は本発明の他の実施例によるポンプシスタ
ーンの断面図である。
FIG. 2 is a sectional view of a pump system turn according to another embodiment of the present invention.

【図3】図3はポンプシスターンと循環式温水回路の第
1の接続状態を示す図である。
FIG. 3 is a diagram showing a first connection state between a pump system turn and a circulating hot water circuit.

【図4】図4はポンプシスターンと循環式温水回路の第
2の接続状態を示す図である。
FIG. 4 is a diagram showing a second connection state of a pump system turn and a circulating hot water circuit.

【図5】図5はポンプシスターンと循環式温水回路の第
3の接続状態を示す図である。
FIG. 5 is a diagram showing a third connection state of a pump system turn and a circulating hot water circuit.

【図6】循環式温水回路の一例の構成略図である。FIG. 6 is a schematic configuration diagram of an example of a circulating hot water circuit.

【符号の説明】[Explanation of symbols]

1 ポンプシスターン 2 ポンプシスターン本体 3 貯液槽 4 フィルタ 5 ポンプ 6 不凍液 10 循環式温水回路 1 Pump system turn 2 Pump system turn body 3 Storage tank 4 Filter 5 Pump 6 Antifreeze solution 10 Circulating hot water circuit

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ポンプシスターン本体と、該ポンプシス
ターン本体内に配置された貯液槽と、上記ポンプシスタ
ーン本体内に設けられ上記貯液槽に接続されたポンプと
を含むポンプシスターンにおいて、上記貯液槽に貯えら
れ上記ポンプによって送出される不凍液を濾過し、該不
凍液中の異物を捕捉するフィルタを上記ポンプシスター
ン本体内に設けたことを特徴とするポンプシスターン。
1. A pump system including a pump systern body, a liquid storage tank disposed in the pump system turn body, and a pump provided in the pump system turn body and connected to the liquid storage tank. A pump cistern, characterized in that a filter for filtering the antifreeze liquid stored in a liquid tank and delivered by the pump and trapping foreign matter in the antifreeze liquid is provided in the pump cistern body.
【請求項2】 請求項1記載のポンプシスターンを循環
式温水回路に接続して、上記ポンプシスターンから吐出
された不凍液が上記循環式温水回路内を一巡して上記ポ
ンプシスターンに戻る循環回路を構成し、上記ポンプシ
スターンと上記循環式温水回路との間で不凍液を循環さ
せ、この際に上記ポンプシスターンに備えられた上記フ
ィルタにより上記循環式温水回路内の異物を捕捉して上
記循環式温水回路内を洗浄することを特徴とする循環式
温水回路の洗浄方法。
2. A circulation circuit in which the pump system turn according to claim 1 is connected to a circulation type hot water circuit, and the antifreeze liquid discharged from the pump system turn goes around the circulation type hot water circuit and returns to the pump system turn. Then, the antifreeze liquid is circulated between the pump system turn and the circulating hot water circuit, and at this time, the filter provided in the pump system turn traps foreign matters in the circulating hot water circuit to capture the foreign matter. A method for cleaning a circulating hot water circuit, characterized by cleaning the inside.
JP30637791A 1991-11-21 1991-11-21 Method for cleaning pump cistern and circulation type hot water circuit Withdrawn JPH05141671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30637791A JPH05141671A (en) 1991-11-21 1991-11-21 Method for cleaning pump cistern and circulation type hot water circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30637791A JPH05141671A (en) 1991-11-21 1991-11-21 Method for cleaning pump cistern and circulation type hot water circuit

Publications (1)

Publication Number Publication Date
JPH05141671A true JPH05141671A (en) 1993-06-08

Family

ID=17956307

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30637791A Withdrawn JPH05141671A (en) 1991-11-21 1991-11-21 Method for cleaning pump cistern and circulation type hot water circuit

Country Status (1)

Country Link
JP (1) JPH05141671A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11313595B2 (en) 2017-07-27 2022-04-26 Mitsubishi Electric Corporation Air-conditioning system and method of sealing heat medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11313595B2 (en) 2017-07-27 2022-04-26 Mitsubishi Electric Corporation Air-conditioning system and method of sealing heat medium

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19990204