JPH0884923A - Vapor heating apparatus - Google Patents
Vapor heating apparatusInfo
- Publication number
- JPH0884923A JPH0884923A JP24700094A JP24700094A JPH0884923A JP H0884923 A JPH0884923 A JP H0884923A JP 24700094 A JP24700094 A JP 24700094A JP 24700094 A JP24700094 A JP 24700094A JP H0884923 A JPH0884923 A JP H0884923A
- Authority
- JP
- Japan
- Prior art keywords
- condensate
- heating
- valve
- steam
- supply pipe
- 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.)
- Pending
Links
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は熱交換器内の被加熱物を
蒸気で加熱するものに関し、特にその加熱温度が100
度C程度の比較的低温の場合に適した蒸気加熱装置に関
する。具体的には重合反応等に用いられる各種反応釜や
食品の蒸溜装置、濃縮装置、あるいは殺菌装置等の蒸気
加熱に用いるものである。これらの場合の被加熱物は、
少しの温度上昇によって熱損傷を生じてしまう場合が多
く、加熱温度を精度良く維持する必要がある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to heating an object to be heated in a heat exchanger with steam, and particularly, the heating temperature thereof is 100.
The present invention relates to a steam heating device suitable for a relatively low temperature of about C. Specifically, it is used for steam heating of various reaction kettles used for polymerization reaction, food distilling devices, concentrating devices, sterilizing devices, and the like. The object to be heated in these cases is
In most cases, a slight temperature rise causes thermal damage, and it is necessary to maintain the heating temperature with high accuracy.
【0002】[0002]
【従来の技術】従来の蒸気加熱装置は例えば図3に示す
ようなものが用いられていた。これは、熱交換器として
の反応釜1を加熱するもので、反応釜1の外周に加熱部
としてのジャケット部2を形成して加熱用の蒸気供給管
3を接続すると共に、加熱により生じた復水を排出する
復水回収装置4を接続したもので、蒸気供給管3から比
較的低圧力すなわち低温度の蒸気をジャケット部2へ供
給することにより、反応釜1内の被加熱物を加熱するも
のである。ジャケット部2内へ供給された蒸気が加熱に
より凝縮してジャケット部2内を大気圧以下程度の低圧
力状態に維持することにより、100度Cあるいは10
0度C以下の比較的低温度で加熱することができるもの
である。2. Description of the Related Art For example, a conventional steam heating device as shown in FIG. 3 has been used. This is for heating the reaction kettle 1 as a heat exchanger. The jacket 2 as a heating part is formed on the outer periphery of the reaction kettle 1 to connect the steam supply pipe 3 for heating, and is generated by heating. A condensate recovery device 4 for discharging condensate is connected to the steam supply pipe 3 to supply steam having a relatively low pressure, that is, a low temperature, to the jacket portion 2 to heat an object to be heated in the reaction vessel 1. To do. The steam supplied into the jacket portion 2 is condensed by heating to maintain the inside of the jacket portion 2 at a low pressure below atmospheric pressure.
It can be heated at a relatively low temperature of 0 ° C. or less.
【0003】復水回収装置4は例えば実開昭50−14
7228号公報に示されているようなもので、復水の流
入口5と還元口6を有すると共に、高圧操作流体の導入
口7と循環口8とを有するケ―シング9内に図示しない
水位と共に浮上降下するフロ―トを配置し、高圧操作流
体の導入口7を開閉する給気弁と、高圧操作流体の循環
口8を開閉する排気弁をフロ―トに連結し、復水の流入
口5と還元口6に配置した逆止弁10,11との協働作
用により、ケ―シング9内が低水位の場合に復水の流入
口5と高圧操作流体の循環口8を開いて復水を導入し、
ケ―シング9内が高水位になると復水の還元口6と高圧
操作流体の導入口7を開いて高圧操作流体をケ―シング
9内に導入し復水を所定の回収先12へ圧送するもので
ある。The condensate water recovery device 4 is, for example, the actual development of Shokai 50-14.
No. 7228, a water level (not shown) is provided in a casing 9 having a condensate inlet port 5 and a reducing port 6 and a high pressure operating fluid inlet port 7 and a circulation port 8. A float that floats and descends together is arranged, and an air supply valve that opens and closes the inlet 7 for the high-pressure operating fluid and an exhaust valve that opens and closes the circulation port 8 for the high-pressure operating fluid are connected to the float so that the flow of the condensate flows. When the inside of the casing 9 has a low water level, the condensate inlet 5 and the high-pressure operating fluid circulation port 8 are opened by the cooperation of the inlet 5 and the check valves 10 and 11 arranged at the return port 6. Introduced condensate,
When the inside of the casing 9 reaches a high water level, the condensate return port 6 and the high-pressure operating fluid inlet 7 are opened to introduce the high-pressure operating fluid into the casing 9 to pump the condensate to a predetermined recovery destination 12. It is a thing.
【0004】[0004]
【発明が解決しようとする課題】上記従来の蒸気加熱装
置では、加熱温度を精度良く維持することができない問
題、特に加熱の初期段階で温度を精度良く調節すること
ができない問題があった。これは、加熱初期においては
ジャケット部2内に多量の空気が残存しておりほぼ大気
圧状態であると共に、供給した加熱用の蒸気が凝縮しに
くくジャケット部2内が所定の低圧力状態とならず10
0度C以下の蒸気温度に調節することができないためで
ある。The conventional steam heating device described above has a problem that the heating temperature cannot be accurately maintained, and in particular, the temperature cannot be accurately adjusted in the initial stage of heating. This is because in the initial stage of heating, a large amount of air remains in the jacket portion 2 and it is in an almost atmospheric pressure state, and the supplied heating vapor is difficult to condense and the inside of the jacket portion 2 is in a predetermined low pressure state. No 10
This is because the steam temperature cannot be adjusted to 0 ° C or lower.
【0005】供給した蒸気で残存している空気を追い出
すこともできるが、追い出すためには時間を要して時間
遅れを生じるために精度良く温度を調節することができ
ないのである。Although the remaining air can be expelled by the supplied steam, it takes time to expel it and a time delay occurs, so that the temperature cannot be accurately adjusted.
【0006】従って本発明の技術的課題は、時間遅れを
生じることなく、精度良く加熱温度を調節することので
きる蒸気加熱装置を得ることである。Therefore, a technical object of the present invention is to obtain a steam heating apparatus capable of accurately adjusting the heating temperature without causing a time delay.
【0007】[0007]
【課題を解決するための手段】上記の技術的課題を解決
するために講じた本発明の技術的手段は、熱交換器に加
熱部を形成して加熱用の蒸気供給管を接続すると共に、
加熱により生じた復水を排出する復水回収装置を接続し
たものにおいて、復水回収装置に所定量の流体を供給す
る流体供給管を接続すると共に、復水の還元口を弁手段
を介して熱交換器の加熱部と接続したものである。The technical means of the present invention taken to solve the above technical problems is to form a heating part in a heat exchanger to connect a steam supply pipe for heating, and
In the case where a condensate recovery device for discharging condensate generated by heating is connected, a fluid supply pipe for supplying a predetermined amount of fluid to the condensate recovery device is connected, and a condensate return port is provided through a valve means. It is connected to the heating part of the heat exchanger.
【0008】[0008]
【作用】上記の技術的手段の作用は下記の通りである。
復水回収装置に流体供給管を接続すると共に、復水の還
元口を加熱部と接続したことにより、加熱初期に流体供
給管から復水回収装置へ流体を供給して所定の高水位に
なると流体は還元口から加熱部へ圧送されて加熱部内に
残存している空気が圧送された流体と置換され系外に排
除される。空気と置換して充満した流体は復水回収装置
に流下して所定の回収先へ圧送される。空気が排除され
流体も圧送された、又は圧送されつつある加熱部内へ所
定温度の加熱用蒸気を供給することにより、100度C
以下の温度であっても所定の温度の蒸気でもって被加熱
物を加熱することができる。The operation of the above technical means is as follows.
By connecting the fluid supply pipe to the condensate recovery device and connecting the return port of the condensate to the heating part, when the fluid is supplied from the fluid supply pipe to the condensate recovery device at the beginning of heating, a predetermined high water level is reached. The fluid is pressure-fed from the reducing port to the heating unit, and the air remaining in the heating unit is replaced with the pressure-fed fluid and is removed from the system. The fluid that has been replaced with air and filled up flows down into the condensate water recovery device and is pressure-fed to a predetermined recovery destination. By supplying the heating steam of a predetermined temperature into the heating section where the air is removed and the fluid is or is being pumped,
It is possible to heat the object to be heated with steam having a predetermined temperature or the following temperature.
【0009】[0009]
【実施例】上記の技術的手段の具体例を示す実施例を説
明する(図1及び図2参照)。本実施例においても従来
例と同様に熱交換器として反応釜15を用いた例を示
す。反応釜15の外周にジャケット部16を形成して蒸
気供給管17を接続すると共に、ジャケット部16の下
部と復水回収装置20とを管路19を介して接続して蒸
気加熱装置を構成する。EXAMPLE An example showing a concrete example of the above technical means will be described (see FIGS. 1 and 2). Also in this embodiment, an example in which the reaction kettle 15 is used as a heat exchanger is shown as in the conventional example. A jacket portion 16 is formed on the outer periphery of the reaction vessel 15 to connect a steam supply pipe 17, and a lower portion of the jacket portion 16 and a condensate recovery device 20 are connected via a pipe line 19 to form a steam heating device. .
【0010】蒸気供給管17は圧力調節弁21と開閉弁
22を介してジャケット部16と接続すると共に、管路
23を介して復水回収装置20の高圧操作流体の導入口
38と接続する。ジャケット部16の上部には、内部の
空気が置換しやすいようにジャケット部16の外部方向
へのみ空気を流下する逆止弁25及び開閉弁18を取り
付ける。但し、蒸気供給管17等を介して空気を外部へ
流下させることができる場合は逆止弁25及び開閉弁1
8は必ずしも必要ではない。The steam supply pipe 17 is connected to the jacket portion 16 via the pressure control valve 21 and the opening / closing valve 22, and is also connected to the high pressure operating fluid inlet port 38 of the condensate recovery device 20 via the pipe line 23. A check valve 25 and an opening / closing valve 18 are attached to the upper portion of the jacket portion 16 so that the air in the inside can be easily replaced. However, when air can be made to flow outside through the steam supply pipe 17 or the like, the check valve 25 and the opening / closing valve 1
8 is not always necessary.
【0011】ジャケット部16の下部と復水回収装置2
0の復水流入口34とを管路19によりバルブ26と逆
止弁27を介して接続する。逆止弁27はジャケット部
16から復水回収装置20方向のみの流体の通過を許容
するもので、逆方向の流体の通過は許容しないものであ
る。復水回収装置20の復水還元口35にも逆止弁28
を介して復水圧送管路29を取り付ける。この逆止弁2
8は復水回収装置20から外部方向へのみ流体を通過さ
せるものである。復水圧送管路29を分岐して弁手段4
0と管路41により復水還元口35をジャケット部16
の下部と接続する。一方、復水流入口34に逆止弁42
と開閉弁43とを介して流体供給管44を接続する。流
体供給管44は必ずしも復水流入口34に接続する必要
はなく、復水回収装置20の任意箇所に接続することが
できる。The lower part of the jacket portion 16 and the condensate recovery device 2
The condensate water inlet 34 of 0 is connected to the valve 26 via the valve 19 and the check valve 27. The check valve 27 allows passage of the fluid from the jacket portion 16 only in the direction of the condensate recovery device 20, but does not permit passage of the fluid in the opposite direction. The check valve 28 is also provided at the condensate return port 35 of the condensate recovery device 20.
The condensate pressure feed line 29 is attached via. This check valve 2
The numeral 8 allows the fluid to pass only from the condensate recovery device 20 to the outside. The condensate pressure feeding pipe line 29 is branched and the valve means 4 is provided.
0 and the pipe 41 to connect the condensate return port 35 to the jacket portion 16
Connect with the bottom of. On the other hand, a check valve 42 is provided at the condensate inlet 34.
The fluid supply pipe 44 is connected via the open / close valve 43. The fluid supply pipe 44 does not necessarily need to be connected to the condensate water inlet 34, but can be connected to any place of the condensate water recovery device 20.
【0012】復水回収装置20の詳細を図2に示す。本
体31に蓋体32を図示しないボルトで取り付けて内部
に復水溜り室33を形成する。本体31の上部に復水溜
り室33に連通する復水の流入口34を形成し、同じく
下部には復水を回収先へ還元する還元口35を形成す
る。蓋体32に高圧操作流体としての蒸気管路23と接
続する導入口38と、この導入口38の奥側に図示しな
い高圧操作流体循環口39を形成する。導入口38は給
気弁50を介して復水溜り室33に連通し、循環口39
は給気弁50の奥側にほぼ平行に配置した図示しない排
気弁51を介して復水溜り室33と連通する。給気弁5
0と排気弁51はスライド棒53と結合していることに
より、スライド棒53が上方へ変位すると給気弁50が
開弁して排気弁51が閉弁し、スライド棒53が下方へ
変位すると給気弁50が閉弁して排気弁51が開弁する
構成のものである。スライド棒53の両側側方にはスラ
イド棒53の上下動を支持する複数のスライドリング5
5を設ける。The details of the condensate recovery system 20 are shown in FIG. A lid 32 is attached to the main body 31 with a bolt (not shown) to form a condensate storage chamber 33 inside. A condensate inlet 34 communicating with the condensate reservoir chamber 33 is formed in the upper part of the main body 31, and a return port 35 for returning the condensate to a recovery destination is formed in the lower part. An inlet port 38 connected to the vapor pipe line 23 as a high-pressure operating fluid is formed in the lid 32, and a high-pressure operating fluid circulation port 39 (not shown) is formed on the inner side of the inlet port 38. The inlet port 38 communicates with the condensate reservoir chamber 33 via the air supply valve 50, and the circulation port 39
Communicates with the condensate reservoir chamber 33 via an exhaust valve 51 (not shown) arranged substantially parallel to the back side of the air supply valve 50. Air supply valve 5
0 and the exhaust valve 51 are connected to the slide rod 53, so that when the slide rod 53 is displaced upward, the air supply valve 50 is opened and the exhaust valve 51 is closed, and when the slide rod 53 is displaced downward. The intake valve 50 is closed and the exhaust valve 51 is opened. A plurality of slide rings 5 for supporting the vertical movement of the slide rod 53 are provided on both sides of the slide rod 53.
5 is provided.
【0013】復水溜り室33内にその水位と共に浮上降
下する密閉フロ―ト56を収容する。フロ―ト56には
レバ―57を取り付け、レバ―57に連結部材58と弁
体60の弁棒59をピン結合する。レバ―57はピン6
1を中心にしてフロ―ト56の浮上降下と共に回転す
る。レバ―57の端部にピン63を介して補助レバ―6
4を連設する。補助レバ―64の他端部は蓋体32に取
り付けたピン65により回動自在に取り付ける。連結部
材58の一端はピン62によりスライド棒53と結合
し、他端はピン66により補助レバ―64と結合する。
連結部材58の中央部には圧縮状態のコイルバネ67を
配置する。In the condensate reservoir chamber 33, a closed float 56 that floats and descends with the water level is housed. A lever 57 is attached to the float 56, and the connecting member 58 and the valve rod 59 of the valve body 60 are pin-connected to the lever 57. Lever 57 has pin 6
Rotate around 1 as the float 56 floats and descends. Auxiliary lever 6 via pin 63 at the end of lever 57
4 in series. The other end of the auxiliary lever 64 is rotatably attached by a pin 65 attached to the lid 32. One end of the connecting member 58 is connected to the slide rod 53 by a pin 62, and the other end is connected to the auxiliary lever 64 by a pin 66.
A compressed coil spring 67 is arranged at the center of the connecting member 58.
【0014】ジャケット部16内の水や復水は管路19
とバルブ26と逆止弁27を通過して復水溜り室33内
へ流下する。復水溜り室33内に復水が溜るとフロ―ト
56が上昇し、レバ―57がピン61を中心に回転す
る。この場合ピン66は下方向へ変位してコイルバネ6
7は更に圧縮される。ピン66が更に下方へ変位してピ
ン62の位置よりもわずかに下に位置するとコイルバネ
67の圧縮力がピン62に作用して、スライド棒53を
一気に上方へ押し上げる。スライド棒53が上方に位置
すると給気弁50が開弁して高圧操作流体としての蒸気
管路23から高圧蒸気が復水溜り室33内に流入すると
共に、給気弁50の奥側に平行に設けた排気弁51が閉
弁して高圧蒸気の排出を防ぐことにより、復水溜り室3
3内の復水は還元口35と逆止弁28と管路29を経て
復水回収先へ圧送される。The water or condensate in the jacket 16 is supplied to the conduit 19
And passes through the valve 26 and the check valve 27 and flows down into the condensate pool chamber 33. When the condensed water is accumulated in the condensed water chamber 33, the float 56 rises and the lever 57 rotates about the pin 61. In this case, the pin 66 is displaced downward to move the coil spring 6
7 is further compressed. When the pin 66 is further displaced downward and positioned slightly below the position of the pin 62, the compression force of the coil spring 67 acts on the pin 62 and pushes up the slide rod 53 at once. When the slide rod 53 is located above, the air supply valve 50 is opened, high-pressure steam flows into the condensate reservoir chamber 33 from the steam pipe 23 as a high-pressure operating fluid, and is parallel to the inner side of the air supply valve 50. The exhaust valve 51 provided in the valve is closed to prevent discharge of high-pressure steam, and
Condensate in 3 is pressure-fed to the condensate recovery destination through the return port 35, the check valve 28, and the pipe 29.
【0015】復水が回収されて復水溜り室33内の水位
が低下すると図2に示すようにフロ―ト56が降下し、
給気弁50が閉弁すると共に排気弁51が開弁して復水
溜り室33内の高圧蒸気を外部へ排出する。復水溜り室
33内の蒸気圧力が低下すると流入口34を介して再び
復水が復水溜り室33内へ流下してくる。この場合弁体
60が上昇して通路を閉じていることにより、復水が還
元口35から排出されることはない。When the condensate is recovered and the water level in the condensate reservoir chamber 33 drops, the float 56 descends as shown in FIG.
The air supply valve 50 is closed and the exhaust valve 51 is opened to discharge the high pressure steam in the condensate reservoir chamber 33 to the outside. When the vapor pressure in the condensate sump chamber 33 decreases, the condensate flows down into the condensate sump chamber 33 again through the inflow port 34. In this case, since the valve body 60 is raised to close the passage, the condensed water is not discharged from the return port 35.
【0016】図1において反応釜15内の被加熱物を加
熱する場合、まず開閉弁18,43,45と弁手段40
を開弁しその他の弁は閉弁して、復水回収装置20内へ
流体供給管44から水等の流体を供給する。水が供給さ
れフロ―ト56が上昇して所定の高水位になると、復水
回収装置20内の流体は還元口35から逆止弁28と弁
手段40と管路41を経てジャケット部16へ供給され
る。ジャケット部16へ流体が供給されることによりジ
ャケット部16内に残存していた空気は逆止弁25と開
閉弁18を通って外部へ排除される。復水回収装置20
の1回だけの作動ではジャケット部16内の空気を充分
に排除できない場合は、復水回収装置20への流体の供
給と還元口35からの圧送を必要回数繰り返すことによ
り、ジャケット部16内の空気を確実に排除することが
できる。空気が排除されると弁18,40,43を閉弁
し弁26を開弁することにより、ジャケット部16内の
水は逆止弁27を経て復水回収装置20内へ自然流下す
る。空気の排除されたジャケット部16内へ、圧力調節
弁21を介して所定圧力すなわち温度の加熱蒸気を供給
することにより、反応釜15は所定温度の蒸気でもって
加熱される。例えば圧力調節弁21から60度Cの蒸気
を供給すると反応釜15はほぼ60度Cで加熱される。In FIG. 1, when heating the object to be heated in the reaction vessel 15, first the on-off valves 18, 43 and 45 and the valve means 40.
Is opened and the other valves are closed, and a fluid such as water is supplied from the fluid supply pipe 44 into the condensate water recovery apparatus 20. When water is supplied and the float 56 rises to a predetermined high water level, the fluid in the condensate water recovery device 20 flows from the return port 35 to the jacket portion 16 via the check valve 28, the valve means 40 and the pipe line 41. Supplied. By supplying the fluid to the jacket portion 16, the air remaining in the jacket portion 16 is removed to the outside through the check valve 25 and the opening / closing valve 18. Condensate recovery device 20
If the air in the jacket portion 16 cannot be sufficiently removed by only one operation of, the supply of the fluid to the condensate water recovery device 20 and the pressure feed from the reducing port 35 are repeated a necessary number of times to remove the air inside the jacket portion 16. Air can be reliably excluded. When the air is removed, the valves 18, 40, 43 are closed and the valve 26 is opened, so that the water in the jacket portion 16 naturally flows into the condensate water recovery device 20 through the check valve 27. By supplying the heating steam having a predetermined pressure, that is, a temperature through the pressure control valve 21 into the jacket portion 16 from which air is removed, the reaction vessel 15 is heated with the steam having a predetermined temperature. For example, when steam of 60 ° C. is supplied from the pressure control valve 21, the reaction kettle 15 is heated at about 60 ° C.
【0017】反応釜15を加熱した蒸気は凝縮して復水
となることにより、ジャケット部16内は初期の圧力状
態に維持される。一方凝縮した復水は、管路19を通っ
て復水回収装置20内へ流下して、上記した作動の繰り
返しにより復水回収先へ圧送される。The steam that has heated the reaction kettle 15 is condensed into condensed water, so that the inside of the jacket 16 is maintained at the initial pressure state. On the other hand, the condensed condensate flows down into the condensate recovery device 20 through the conduit 19 and is pressure-fed to the condensate recovery destination by repeating the above-described operation.
【0018】[0018]
【発明の効果】上記の様に本発明によれば、復水回収装
置に流体供給管を接続すると共に、復水の還元口を加熱
部と接続して加熱部内の残存空気を速やかに排除して、
所定温度の蒸気を供給することにより、被加熱物を時間
遅れなく且つ温度精度良く加熱することができる。As described above, according to the present invention, the fluid supply pipe is connected to the condensate recovery device, and the reducing port of the condensate is connected to the heating part to quickly remove the residual air in the heating part. hand,
By supplying the steam of a predetermined temperature, the object to be heated can be heated with good temperature accuracy without time delay.
【図1】本発明の蒸気加熱装置の実施例の構成図であ
る。FIG. 1 is a configuration diagram of an embodiment of a steam heating device of the present invention.
【図2】本発明の蒸気加熱装置に用いた復水回収装置の
断面図である。FIG. 2 is a sectional view of a condensate recovery device used in the steam heating device of the present invention.
【図3】蒸気加熱装置の従来例を示す構成図である。FIG. 3 is a configuration diagram showing a conventional example of a steam heating device.
15 反応釜 16 ジャケット部 17 蒸気供給管 20 復水回収装置 21 圧力調節弁 35 復水還元口 40 弁手段 41 管路 44 流体供給管 15 Reactor 16 Jacket part 17 Steam supply pipe 20 Condensate recovery device 21 Pressure control valve 35 Condensate reduction port 40 Valve means 41 Pipeline 44 Fluid supply pipe
Claims (1)
気供給管を接続すると共に、加熱により生じた復水を排
出する復水回収装置を接続したものにおいて、復水回収
装置に所定量の流体を供給する流体供給管を接続すると
共に、復水の還元口を弁手段を介して熱交換器の加熱部
と接続したことを特徴とする蒸気加熱装置。1. A condensate recovery device comprising a heat exchanger formed with a heating part and connected with a steam supply pipe for heating, and a condensate recovery device for discharging condensate generated by heating. A steam heating device characterized in that a fluid supply pipe for supplying a predetermined amount of fluid is connected, and a return port for condensate is connected to a heating part of a heat exchanger via valve means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24700094A JPH0884923A (en) | 1994-09-14 | 1994-09-14 | Vapor heating apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24700094A JPH0884923A (en) | 1994-09-14 | 1994-09-14 | Vapor heating apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0884923A true JPH0884923A (en) | 1996-04-02 |
Family
ID=17156891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24700094A Pending JPH0884923A (en) | 1994-09-14 | 1994-09-14 | Vapor heating apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0884923A (en) |
-
1994
- 1994-09-14 JP JP24700094A patent/JPH0884923A/en active Pending
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