JP3424324B2 - Gas chromatograph oven - Google Patents
Gas chromatograph ovenInfo
- Publication number
- JP3424324B2 JP3424324B2 JP11869694A JP11869694A JP3424324B2 JP 3424324 B2 JP3424324 B2 JP 3424324B2 JP 11869694 A JP11869694 A JP 11869694A JP 11869694 A JP11869694 A JP 11869694A JP 3424324 B2 JP3424324 B2 JP 3424324B2
- Authority
- JP
- Japan
- Prior art keywords
- oven
- fan
- gas chromatograph
- heater
- space
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/30—Control of physical parameters of the fluid carrier of temperature
- G01N2030/3084—Control of physical parameters of the fluid carrier of temperature ovens
Landscapes
- Furnace Details (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は一定の温度あるいは所定
の温度プログラムで変化する温度条件の下で分析を行う
ガスクロマトグラフに関し、特にカラムを収容した温度
調節可能なオーブンに関するものである。
【０００２】
【従来の技術】従来のガスクロマトグラフ用オーブンに
おいては、空気の流れを考慮して側壁から一定間隔離れ
た方形の仕切り板で、オーブン空間をヒータ及びファン
が配置される空間とカラムが配置される空間とに間仕切
っている（米国特許第４，１８１，６１３号明細書参
照）。
【０００３】
【発明が解決しようとする課題】しかし、従来のガスク
ロマトグラフ用オーブンにあっては、ファンの回転によ
ってヒータ周辺の空気が攪拌回転されるが、仕切り板に
よって邪魔されながらカラム周辺へその渦流が伝えられ
るため、オーブン内の空気の攪拌効率が悪く、オーブン
冷却時の冷却速度も遅かった。
【０００４】本発明は、オーブン内の空気の攪拌効率が
よいガスクロマトグラフ用オーブンを提供することを目
的としている。
【０００５】
【課題を解決するための手段】上記目的を達成するため
に、本発明のガスクロマトグラフ用オーブンにおいて
は、オーブン空間をヒータ及びファンが配置される空間
とカラムが配置される空間とに間仕切る仕切り板の形状
を、ファン軸と同心の中穴を有する略円状としたもので
ある。
【０００６】仕切り板のドーナツ形状としては、ファン
軸と同心円の真円形状のものが該当することは勿論であ
るが、側壁から一定間隔離れた正方形の四隅を斜めに切
り落とした八角形状のもの、その他多角形状のものが含
まれる。
【０００７】
【作用】上記のように構成されたガスクロマトグラフ用
オーブンでは、ファンの回転によってヒータ周辺の空気
が回転しながら仕切り板の回りからスムースにカラムが
配置されるオーブン空間へ押し出される。
【０００８】
【実施例】以下、本発明のガスクロマトグラフ用オーブ
ンについて図面を参照して説明するに、オーブン１０
は、カラム１１（図３参照）を収容することのできる大
きさの外函１２と、その内部に設けられたヒータ１３及
びファン１４からなる。外函１２の前面にはカラム１１
をオーブン内に装入するための扉１５が設けられ、それ
に対向する後部壁１６の内側にはファン１４が配置さ
れ、同後部壁１６の外側にはファンモータ１７が固定さ
れる。ヒータ１３はファン１４の外周側に配置される。
なお、ファン１４の羽形状は、前方及び放射方向に送風
するように設定されている。
【０００９】オーブン空間は、ヒータ１３から発せられ
る赤外線がカラム１１に直接当たらないように、ヒータ
１３及びファン１４が配置される空間とカラム１１が配
置される空間とに仕切り板２３によって間仕切られる。
仕切り板２３はファンモータ１７の軸２２と同心円のド
ーナツ形状であるが、特に、実施例のものは正方形の四
隅を斜めに切り落とした八角形状である。
【００１０】外函１２及び扉１５はいずれもステンレス
製の表板及び裏板の間に断熱材を挟んだ厚壁で形成され
ており、外函１２の側面（扉１５と後部壁１６とを接続
する周囲の４面）壁には表裏とも開口は設けられていな
い。外函１２の後部壁１６は図３（ｂ）に示すように、
その裏板１６１に中央のファンモータ１７の軸２２を中
心としてファン１４の先端の回転軌跡よりも内側の部分
に吸気用内部開口３０（図２参照）が設けられており、
また１つのコーナに排気用内部開口３１（図２及び図３
（ａ）参照）が設けられている。さらに後部壁１６の表
板１６２には、排気用開口３１と同じ位置に排気用外部
開口３２（図２及び図３（ａ）参照）が設けられてお
り、排気用外部開口３２のすぐ下に吸気用外部開口３３
（図３（ｂ）参照）が設けられている。排気用内部開口
３１と排気用外部開口３２は同じ位置にあるためストレ
ートに連結され、その周囲に断熱材１６３が設けられる
が、吸気用外部開口３３と吸気用内部開口３０は内外で
位置が異なるため、両者は後部壁１６内部に形成された
連通路（ダクト）３４を通して連通される。従って、後
部壁１６において断熱材１６３は、排気用内外開口３
１、３１及びこのダクト３４を除いた部分に充填され
る。排気用外部開口３２及び吸気用外部開口３３にはそ
れぞれ蓋３６、３７が設けられ、ステッピングモータ３
８（図２参照）により開度の調節が可能である。
【００１１】このオーブン１０によりカラム１１を加熱
するにあたっては、ヒータ１３に通電し、ファン１４を
回転することによって、ヒータ周辺の温度の高い空気が
回転しながら仕切り板２３の回りからカラム１１が設け
られた空間へ供給され、攪拌される。温度調節は、ヒー
タ１３への通電量と共に吸気通路及び排気通路３６、３
７の開度を調節することにより行われる。
【００１２】一方、オーブン１０の内部を冷却する場合
には、吸気通路及び排気通路３６、３７を全開としてフ
ァン１４を回転させる。ファン１４の羽形状は前方及び
放射方向に送風するように設定されているので、ファン
１４の後方中心部の気圧は低下し、周辺部の気圧が高く
なる。これにより、外部の低温の空気が中心側の吸気通
路３３、３４、３０から吸入されると共に、内部の高温
の空気が周辺部の排気通路３１、３２から速やかに排出
される。
【００１３】
【発明の効果】本発明は、以上説明したように構成され
ているので、オーブン空間内の攪拌効率が上がり、所定
温度への制御応答性がよくなると共に、オーブン冷却時
の冷却速度を上昇させることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas chromatograph for performing an analysis under a constant temperature or a temperature condition which changes according to a predetermined temperature program, and more particularly to a temperature control apparatus containing a column. Regarding possible ovens. 2. Description of the Related Art In a conventional gas chromatograph oven, a rectangular partition plate spaced apart from a side wall by a predetermined distance in consideration of the flow of air is used to divide the oven space into a space in which a heater and a fan are arranged and a column. And a space to be arranged (see U.S. Pat. No. 4,181,613). [0003] However, in the conventional gas chromatograph oven, the air around the heater is agitated and rotated by the rotation of the fan. Since the vortex was transmitted, the efficiency of stirring the air in the oven was poor, and the cooling rate at the time of cooling the oven was also slow. [0004] It is an object of the present invention to provide an oven for a gas chromatograph having a high efficiency of stirring air in the oven. [0005] In order to achieve the above object, in a gas chromatograph oven of the present invention, the oven space is divided into a space in which a heater and a fan are arranged and a space in which a column is arranged. The partitioning plate has a substantially circular shape having a central hole concentric with the fan shaft. As the donut shape of the partition plate, it is needless to say that a true circular shape concentric with the fan shaft is applicable, but an octagonal shape obtained by diagonally cutting off four corners of a square at a predetermined interval from the side wall, Other polygonal shapes are also included. In the gas chromatograph oven configured as described above, the air around the heater is pushed out from around the partition plate into the oven space where the columns are smoothly arranged while rotating around the heater by the rotation of the fan. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas chromatograph oven of the present invention will be described below with reference to the drawings.
Is composed of an outer box 12 having a size capable of accommodating the column 11 (see FIG. 3), and a heater 13 and a fan 14 provided therein. Column 11 on the front of outer box 12
A door 15 is provided for charging the inside of the oven, a fan 14 is disposed inside a rear wall 16 facing the door 15, and a fan motor 17 is fixed outside the rear wall 16. The heater 13 is arranged on the outer peripheral side of the fan 14.
The wing shape of the fan 14 is set so as to blow air forward and radially. The oven space is partitioned by a partition plate 23 into a space in which the heater 13 and the fan 14 are arranged and a space in which the column 11 is arranged so that infrared rays emitted from the heater 13 do not directly hit the column 11.
The partition plate 23 has a donut shape concentric with the shaft 22 of the fan motor 17, and in particular, the partition plate 23 in the embodiment has an octagonal shape in which four corners of a square are cut off obliquely. Each of the outer box 12 and the door 15 is formed of a thick wall in which a heat insulating material is sandwiched between a front plate and a back plate made of stainless steel, and a side surface of the outer box 12 (connecting the door 15 and the rear wall 16). There are no openings on the front and back sides of the four surrounding walls). The rear wall 16 of the outer box 12 is, as shown in FIG.
The back plate 161 is provided with an intake internal opening 30 (see FIG. 2) at a portion inside the rotation locus of the tip of the fan 14 about the shaft 22 of the center fan motor 17.
Also, one corner has an internal exhaust opening 31 (FIGS. 2 and 3).
(See (a)). Further, the front plate 162 of the rear wall 16 is provided with an exhaust opening 32 (see FIGS. 2 and 3A) at the same position as the exhaust opening 31, and is provided immediately below the exhaust opening 32. External opening 33 for intake
(See FIG. 3B). Since the exhaust inner opening 31 and the exhaust outer opening 32 are located at the same position, they are connected straight, and a heat insulating material 163 is provided therearound. Therefore, both are communicated through a communication passage (duct) 34 formed inside the rear wall 16. Therefore, the heat insulating material 163 in the rear wall 16 is formed by the inner and outer openings 3 for exhaust.
1, 31 and the portion excluding this duct 34 are filled. A lid 36 and a lid 37 are provided in the external opening 32 for exhaust and the external opening 33 for intake, respectively.
8 (see FIG. 2) allows the opening degree to be adjusted. When the column 11 is heated by the oven 10, the heater 11 is energized and the fan 14 is rotated, so that the high-temperature air around the heater rotates and the column 11 is provided from around the partition plate 23. It is supplied to the designated space and stirred. The temperature is adjusted by controlling the amount of electricity supplied to the heater 13 and the intake and exhaust passages 36, 3
7 by adjusting the opening degree. On the other hand, when cooling the inside of the oven 10, the fan 14 is rotated with the intake and exhaust passages 36 and 37 fully opened. Since the wing shape of the fan 14 is set so as to blow air forward and in the radial direction, the air pressure in the central portion behind the fan 14 decreases, and the air pressure in the peripheral portion increases. Thus, the external low-temperature air is sucked in from the central intake passages 33, 34, and 30, and the internal high-temperature air is quickly discharged from the peripheral exhaust passages 31 and 32. According to the present invention, as described above, the stirring efficiency in the oven space is increased, the control response to a predetermined temperature is improved, and the cooling rate at the time of cooling the oven is reduced. Can be raised.
【図面の簡単な説明】
【図１】本発明実施例のオーブンの一部透視斜視図であ
る。
【図２】本発明実施例のオーブンの背面図である。
【図３】本発明実施例のオーブンの上部断面図（ａ）及
び下部断面図（ｂ）である。
【符号の説明】
１０…オーブン １２…外函
１３…ヒータ １４…ファン
１６…後部壁 １７…ファンモー
タ
２２…ファンモータ軸 ２３…仕切り板BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially transparent perspective view of an oven according to an embodiment of the present invention. FIG. 2 is a rear view of the oven according to the embodiment of the present invention. FIG. 3 is an upper sectional view (a) and a lower sectional view (b) of an oven according to an embodiment of the present invention. [Description of Signs] 10 ... Oven 12 ... Outer box 13 ... Heater 14 ... Fan 16 ... Rear wall 17 ... Fan motor 22 ... Fan motor shaft 23 ... Partition plate
Claims (1)
ラムをヒータ及びファンにより均熱加熱するオーブンに
おいて、 オーブン空間を前記ヒータ及びファンが配置される空間
とカラムが配置される空間とに間仕切る仕切り板を設け
ると共に、同仕切り板を前記ファン軸と同心円の中穴を
有する略円状としたことを特徴とするガスクロマトグラ
フ用オーブン。(57) [Claim 1] In an oven for uniformly heating a column of a gas chromatograph housed therein by a heater and a fan, an oven space is provided with a space and a column in which the heater and the fan are arranged. A gas chromatograph oven characterized in that a partition plate is provided in a space provided with the fan shaft and the partition plate is formed in a substantially circular shape having a concentric hole with the fan shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11869694A JP3424324B2 (en) | 1994-05-31 | 1994-05-31 | Gas chromatograph oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11869694A JP3424324B2 (en) | 1994-05-31 | 1994-05-31 | Gas chromatograph oven |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07325074A JPH07325074A (en) | 1995-12-12 |
| JP3424324B2 true JP3424324B2 (en) | 2003-07-07 |
Family
ID=14742901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11869694A Expired - Fee Related JP3424324B2 (en) | 1994-05-31 | 1994-05-31 | Gas chromatograph oven |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3424324B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579696A (en) * | 2020-06-17 | 2020-08-25 | 台州市创导科学仪器有限公司 | Miniature chromatographic column box |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181613A (en) * | 1977-04-08 | 1980-01-01 | Hewlett-Packard Company | Venting method for a chromatograph oven |
| JPS5968259U (en) * | 1982-10-30 | 1984-05-09 | 株式会社島津製作所 | Chromatograph constant temperature device |
-
1994
- 1994-05-31 JP JP11869694A patent/JP3424324B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07325074A (en) | 1995-12-12 |
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