JP6503919B2 - Gas chromatograph - Google Patents

Description

  The present invention relates to a gas chromatograph apparatus, and more particularly to a gas chromatograph apparatus which accommodates a column inside an oven and regulates the temperature of the column.

  In the gas chromatograph apparatus, the sample gas is pushed by the carrier gas and introduced into the column from the inlet end of the column. Thus, the respective measurement substances contained in the sample gas are separated in the time axis direction while passing through the column, and reach the outlet end of the column. At this time, in order to allow the sample gas to pass through the column at a predetermined temperature, the column can be housed inside the oven to control the temperature inside the oven (for example, any temperature up to 450 ° C.) A tograph apparatus is used (see, for example, Patent Document 1).

  4 to 6 are views showing an example of a conventional gas chromatograph apparatus, FIG. 4 is an XY sectional view, FIG. 5 is a ZX sectional view, and FIG. 6 is a YZ sectional view. A direction horizontal to the ground is taken as an X direction, a direction horizontal to the ground and perpendicular to the X direction as a Y direction, and a direction perpendicular to the X direction and the Y direction as a Z direction.

  The gas chromatograph apparatus 101 includes a housing 120, an oven 10 disposed inside the housing 120, a first motor 40 that rotates a first spine 32, and a second motor 41 that rotates a second spine 33. A sample vaporization chamber (not shown) into which a sample is introduced, a detector (not shown), and a heater solid-state relay as a heater control circuit (hereinafter, "solid-state relay" is abbreviated as "SSR") And 50, a first motor SSR 51 which is a first motor control circuit, and a second motor SSR 52 which is a second motor control circuit.

The oven 10 is provided with a cube-shaped housing made of heat insulating upper and lower four walls 11 and a rear wall 12 and a front door 13 as a front wall. Further, inside the oven 10, a heater 14 having an output of about 1000 W for heating the air inside the oven 10, a column 31 through which the sample gas passes, and a first honey 32 are accommodated.
Then, a cylindrical through hole is formed in the back wall 12, the first shaft 34 is inserted through the through hole, and the first spine 32 inside the oven 10 and the first motor 40 outside the oven 10 are formed. Link.

The housing 120 is a rectangular plastic or metal vessel wall surrounded by the left side wall 21, the right side wall 22, the back side wall 23, the front side wall 24, the top side wall 25, and the bottom side wall 126; And four legs 26a. Moreover, in the inside of the housing | casing 120, the oven 10 opens a predetermined distance (space) in the apparatus wall right and left and back, and is accommodated.
At the front of the left side wall 21, slits (front opening) 21a of a plurality of long holes are formed, and at the front of the right side wall 22, slits (front opening) 22a of a plurality of long holes are formed. It is formed.

In the central portion of the back wall 23, a circular rear opening 23a having a diameter L (for example, 100 to 130 mm) is formed. In addition, a second hand 33 is disposed at a position 5 to 10 mm in front of the rear opening 23a.
At four corners of the bottom wall 126, cylindrical legs 26a are provided.

  In such a gas chromatograph apparatus 101, the heating power is supplied to the heater 14 by the heater SSR 50 to heat the air inside the oven 10, and the power is supplied to the first motor 40 by the first motor SSR 51. The interior of the oven 10 is brought to a uniform target temperature by rotating the horns 32 and circulating heated air.

  Also, by supplying electric power to the second motor 41 by the second motor SSR 52 to rotate the second spine 33, air is provided between the oven wall and the oven wall from the left and right slits (front openings) 21a and 22a. By passing the air from the front to the rear between the wall and the oven 10, and then discharging the air from the rear opening 23a, whereby the housing 120, the first motor 40, and the second motor 41 are And it is made to cool with air.

  By the way, in the gas chromatograph apparatus 101, when the heater SSR 50, the first motor SSR 51, and the second motor SSR 52 become high temperature, the electric conducting wires etc. deteriorate, so these are on the top wall 10a or side wall of the oven 10. They are provided through the heat radiation plates 160, 161 and 162, respectively (see FIG. 5).

The heat radiation plate 160 attached to the lower end portion of the heater SSR 50 is a metal plate, and is stretched from the upper surface wall 10 a of the oven 10 in the Z direction by a predetermined distance (for example, 10 cm).
The heat radiation plate 161 attached to the lower end portion of the first motor SSR 51 is a metal plate and is stretched from the upper surface wall 10 a of the oven 10 in the Z direction by a predetermined distance (for example, 10 cm).
The heat radiation plate 162 attached to the lower end portion of the second motor SSR 52 is a metal plate, and is stretched from the upper surface wall 10 a of the oven 10 in the Z direction by a predetermined distance (for example, 10 cm).

  Thus, the heat radiation plates 160 to 162 are cooled by the air flowing from the front to the rear between the wall and the oven 10, whereby the heater SSR 50, the first motor SSR 51, and the second motor SSR 52 The heat from the oven 10 is blocked to prevent temperature rise.

Unexamined-Japanese-Patent No. 10-19867

  However, in the gas chromatograph apparatus 101 as described above, although the heat radiation plates 160 to 162 are provided by the rise of the air warmed in the oven 10, the heater SSR 50, the first motor SSR 51, the first motor SSR 51 The two-motor SSR 52 may have a high temperature, and in particular, it has been considered dangerous that the heater SSR 50, which supplies high power, has a high temperature.

  In order to solve the above-mentioned subject, the present inventor examined the method of cooling SSR for heaters appropriately. Therefore, it has been found that since the air warmed by the oven rises, the heater SSR is provided not on the top wall of the oven but on the bottom wall of the housing. Furthermore, it has been found that the bottom wall is formed with an opening that allows air to flow upward.

That is, the gas chromatograph apparatus of the present invention comprises a case having a wall including a top wall, a bottom wall, a right side wall, a left side wall, a front wall and a back wall, and a leg portion provided on the bottom wall. It is disposed between the oven, which is disposed in the interior of the vessel wall and spaced apart from the vessel wall, the column, which is disposed in the interior of the oven, the first honey and heater, the vessel wall and the oven. A gas chromatograph apparatus comprising: a first motor for rotating the first spine; a heater control circuit for controlling the heater; and a first motor control circuit for controlling the first motor, the bottom wall including: A bottom opening is formed on the front side and the rear side, and the heater control circuit is mounted immediately above the bottom opening formed on the rear side of the bottom wall .

  According to the gas chromatograph apparatus of the present invention, the heater control circuit can be cooled effectively. In addition, the heat radiation plate for the heater control circuit becomes unnecessary, which leads to cost reduction.

(Means and effects for solving other problems)
In the above invention, the first motor control circuit may be attached to the bottom wall.
According to such a gas chromatograph apparatus of the present invention, the first motor control circuit can be cooled effectively. In addition, the heat radiation plate for the first motor control circuit becomes unnecessary, leading to cost reduction.

  In the above invention, the front opening may be formed in the front of the right side wall and the front of the left side wall, and the rear opening may be formed in the back wall. Good.

And in the above invention, a second motor arranged between the wall and the oven and a second motor for rotating the second blade, and a second motor control circuit for controlling the second motor The second motor control circuit may be attached to the bottom wall.
According to such a gas chromatograph apparatus of the present invention, by rotating the second honey, air is taken in between the oven wall and the oven through the opening on the front and the bottom, and this air is transferred between the oven wall and the oven Between the flow from the front to the back, the heater control circuit, the second motor control circuit, the housing, the first motor, and the second motor are cooled with air by discharging the air from the rear opening. Can.

  Furthermore, in the above invention, the heater control circuit, the first motor control circuit, and / or the second motor control circuit may be solid state relays or triacs.

An XY sectional view showing an example of a gas chromatograph device concerning the present invention. ZX sectional drawing similar to FIG. YZ sectional drawing similar to FIG. XY sectional drawing which shows an example of the conventional gas chromatograph apparatus. ZX sectional drawing similar to FIG. YZ sectional drawing similar to FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and it goes without saying that various aspects are included without departing from the spirit of the present invention.

  1 to 3 are views showing an example of a gas chromatograph apparatus according to the present invention, FIG. 1 is an XY sectional view, FIG. 2 is a ZX sectional view, and FIG. 3 is a YZ sectional view. The same reference numerals are given to the same components as the gas chromatograph apparatus 101 described above.

  The gas chromatograph apparatus 1 includes a housing 20, an oven 10 disposed inside the housing 20, a first motor 40 that rotates a first spine 32, and a second motor 41 that rotates a second spine 33. A sample vaporization chamber (not shown) into which a sample is introduced, a detector (not shown), a heater SSR 50 which is a heater control circuit, a first motor SSR 51 which is a first motor control circuit, and a second And a second motor SSR 52 that is a motor control circuit.

The housing 20 is a rectangular plastic or metal vessel wall surrounded by the left side wall 21, the right side wall 22, the back side wall 23, the front side wall 24, the top side wall 25, and the bottom side wall 26; And four legs 26a. Moreover, in the inside of the housing | casing 20, the oven 10 opens a predetermined distance (space) in the device wall and right and left and back, and is accommodated.
At the front of the left side wall 21, slits (front opening) 21a of a plurality of long holes are formed, and at the front of the right side wall 22, slits (front opening) 22a of a plurality of long holes are formed. It is formed.

In the central portion of the back wall 23, a circular rear opening 23a having a diameter L (for example, 100 to 130 mm) is formed. In addition, a second hand 33 is disposed at a position 5 to 10 mm in front of the rear opening 23a.
At the four corners of the bottom wall 26, cylindrical legs 26a are provided, and a plurality of elongated slots (bottom openings) 26b are formed.

  The heat radiation plate 60 attached to the lower end portion of the heater SSR 50 is a metal plate-like body, and is drawn from the bottom wall 26 in the Z direction by a predetermined distance (for example, 2 cm). That is, the heater SSR 50 is not attached to the oven 10 and provided below the oven 10.

  The heat radiation plate 61 attached to the lower end portion of the first motor SSR 51 is a metal plate-like body, and extends from the bottom wall 26 in the Z direction by a predetermined distance (for example, 4 cm). That is, the first motor SSR 51 is not attached to the oven 10 and provided below the oven 10.

  The heat radiation plate 62 attached to the lower end portion of the second motor SSR 52 is a metal plate-like body, and extends from the bottom wall 26 in the Z direction by a predetermined distance (for example, 4 cm). That is, the second motor SSR 52 is not attached to the oven 10 and is provided on the lower side of the oven 10.

  In such a gas chromatograph apparatus 1, the heating power is supplied to the heater 14 by the heater SSR 50 to heat the air inside the oven 10, and the power is supplied to the first motor 40 by the first motor SSR 51. The interior of the oven 10 is brought to a uniform target temperature by rotating the horns 32 and circulating heated air.

  Also, by supplying electric power to the second motor 41 by the second motor SSR 52 to rotate the second spine 33, air is provided between the oven wall and the oven wall from the left and right slits (front openings) 21a and 22a. The air flows from the front to the rear between the wall and the oven 10, and air is taken in from the slit (bottom opening) 26b between the wall and the oven 10, After flowing from the lower side to the upper side between the wall and the oven 10, the entire inside of the housing 20 is cooled with air by discharging the air from the rear opening 23a.

  As described above, according to the gas chromatograph device 1 of the present invention, the heater SSR 50, the first motor SSR 51, and the second motor SSR 52 can be effectively cooled.

Other Embodiments
(1) In the gas chromatograph apparatus 1 described above, the heater SSR 50, the first motor SSR 51, and the second motor SSR 52 are provided on the bottom wall 26 via the heat radiation plates 60 to 62. It may be provided directly on the bottom wall without the heat radiation plate.

(2) In the gas chromatograph apparatus 1 described above, the configuration has been described in which the heater SSR 50, the first motor SSR 51, and the second motor SSR 52 are provided, but instead, the heater triac and the first motor triac are provided. The second motor triac may be provided.

  The present invention can be utilized for a gas chromatograph apparatus.

DESCRIPTION OF SYMBOLS 1 gas chromatograph apparatus 10 oven 14 heater 20 housing | casing 21 left side wall 22 right side wall 23 back wall 24 front wall 25 top wall 26 bottom wall 26a leg 26b slit (bottom opening)
31 column 32 first fly 40 first motor 50 heater SSR (heater control circuit)
51 First Motor SSR (First Motor Control Circuit)
52 Second Motor SSR (Second Motor Control Circuit)

Claims (5)

A housing having a vessel wall comprising a top wall, a bottom wall, a right side wall, a left side wall, a front wall and a back wall, and a leg provided on the bottom wall;
An oven disposed in the interior of the vessel wall with a space between the vessel wall and the oven;
A column disposed inside the oven, a first honey and a heater;
A first motor disposed between the wall and the oven to rotate the first honey;
A heater control circuit that controls the heater;
And a first motor control circuit for controlling the first motor.
In the bottom wall, bottom openings are formed on the front and rear sides ,
The gas chromatograph apparatus, wherein the heater control circuit is mounted directly on a bottom opening formed on the rear side of the bottom wall .   The gas chromatograph apparatus according to claim 1, wherein the first motor control circuit is attached to the bottom wall.   A front opening is formed in the front of the right side wall and a front of the left side wall, and a rear opening is formed in the back wall. The gas chromatograph apparatus as described in 2. A second honey arranged between the wall and the oven and a second motor for rotating the second honey;
And a second motor control circuit for controlling the second motor,
The gas chromatograph device according to claim 3, wherein the second motor control circuit is attached to the bottom wall.   5. The heater control circuit, the first motor control circuit, and / or the second motor control circuit is a solid state relay or a triac according to any one of claims 1 to 4. Gas chromatograph device.

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