KR200238966Y1 - Gas analysis machine - Google Patents

Abstract

The present invention relates to a gas analyzer for measuring and analyzing the exhaust gas of a vehicle.

The present invention is such that the first frame having a gas injection port and the first frame having a gas discharge port are screwed to both ends of the analysis tube, and then the first and second frames are printed circuit boards having a connector for circuit connection. (PCB) and the first and second sheet metal cover having screws and infrared sensors or detection sensors and lenses, respectively, with screws, thereby shielding external noise through the sheet metal cover, while uniformly and consistently emitting infrared radiation. It can maintain the exhaust gas measurement precisely, and prevent the vortex of the gas injected into the analysis tube while preventing the error of the analysis data due to the remaining gas.

In addition, the present invention allows the gas injection into the analysis tube to be kept constant so that the analysis of the gas is made precisely, while eliminating the use of a chopper and a motor that physically makes a frequency for chopping the exhaust gas as in the conventional art. Provided is a gas analyzer that allows for miniaturization of the analyzer.

Description

Gas analyzer {Gas analysis machine}

The present invention relates to a gas analyzer, and in particular, when the gas (car exhaust gas) is sucked into the gas analyzer, the wavelength of the infrared rays penetrating the gas analyzer is detected in a uniform and stable state so that the amount of gas can be accurately measured. A gas analyzer that allows measurement.

In general, a gas analyzer passes an automobile exhaust gas into an analysis tube emitting infrared light, so that the exhaust gas absorbs an inherent wavelength of infrared rays and measures the amount thereof.

As shown in FIG. 1, a conventional gas analyzer has a gas flow path formed by fixing an injection port 2 and a discharge port 3 through which gas is injected and discharged at both ends of the analysis tube 1 by welding. Lenses 4a and 4b were fixed to both ends of the analysis tube 1 with the lens fixture 4 to seal both ends of the analysis tube 1.

In addition, an infrared emitting unit 5 emitting infrared light is positioned outside the lens 4a on which the injection hole 2 is formed, and an analysis tube 1 is disposed on the outside of the lens 4b on which the discharge port 3 is formed. It has a structure in which the detection sensor 6 for detecting the infrared rays passing while the unique wavelength is absorbed from the injected gas.

In addition, conventional gas analyzers have used a chopper (7) attached to the motor (8), which physically makes a frequency for chopping the exhaust gas.

However, in the conventional gas analyzer, the gas injection hole 2 and the discharge hole 3 are fixed to the analysis tube 1 by welding, so that the inside of the analysis tube 1 becomes uneven from the welding while the infrared emission is uniform. Not only did not remain constant, and because of this, there was a problem that the measurement of the exhaust gas does not proceed precisely.

In addition, when gas is injected into the analysis tube 1 through the injection hole 2, the space A and B between the injection hole 2 or the discharge hole 3 and the lens 4a are as shown in FIG. 1. As the vortex is generated, the gas is not completely discharged through the discharge port 3, and a residual amount is generated. As a result, a closed end causing an error in the analytical data of the gas amount is followed.

In addition, in the related art, the gas injected into the analysis tube 1 through the injection hole 2 is circularly injected and then spreads when discharged to the outside through the discharge hole 3, thereby injecting the gas through the injection hole 2. This did not remain constant.

In addition, conventional gas analyzers do not provide a structure for shielding external noise, so that there are many factors that will cause a significant error in the gas analysis data.

In addition, conventionally, a chopper 7 that physically makes a frequency for chopping exhaust gas is attached to the motor 8, and the inlet 2 and the outlet 3 are welded to the analysis tube ( Fixed in 1) had difficulty in miniaturizing the gas analyzer.

Therefore, the present invention was devised to solve the above-described problems, and an object of the present invention is to screw the first frame having a gas injection port and the first frame having a gas discharge port to both ends of an analysis tube by a screw method. Then, the first and second frames are screwed together with the printed circuit board (PCB) having the connector for circuit connection and the first and second sheet metal cover having the infrared emitting means or the detection sensor and the lens, respectively, The cover shields external noise while keeping the emission of infrared rays uniform and constant so that the measurement of the exhaust gas can be precisely carried out, as well as preventing the vortex of the gas injected into the analyzer tube. The aim is to provide a gas analyzer that prevents errors in analytical data.

In addition, the present invention allows the gas injection into the analysis tube to be kept constant so that the analysis of the gas is made precisely, while eliminating the use of a chopper and a motor that physically makes a frequency for chopping the exhaust gas as in the conventional art. It is to provide a gas analyzer that allows the miniaturization of the analyzer.

1 is a cross-sectional view showing the structure of a conventional gas analyzer.

Figure 2 is a perspective view showing the structure of a gas analyzer as an embodiment of the present invention.

Figure 3 is a cross-sectional view showing the structure of a gas analyzer as an embodiment of the present invention.

* Explanation of symbols on the main parts of the drawings *

One ; Analyst 10; First frame

10a; Inlet 10b; First Euro Home

20; Second frame 20a; Outlet

20b; A second flow path groove 30; 1st sheet metal cover

31; A first printed circuit board 31a; First connector

32; First lens 33; Infrared ray emitting means

33a; First support 40; 2nd sheet metal cover

41; Second printed circuit board 41a; Second connector

42; Second lens 43; Detection sensor

43a; Second support 50; 1st O-ring

60; Second o-ring 70; Third frame

80; Fourth frame 90; Heating section

100; screw

Hereinafter, a preferred embodiment of the present invention based on the accompanying drawings.

2 is a perspective view showing the structure of a gas analyzer as an embodiment of the present invention, Figure 3 is a cross-sectional view showing the structure of a gas analyzer as an embodiment of the present invention.

As shown in Figs. 2 and 3, in a gas analyzer having an analysis tube 1 to measure exhaust gas of an automobile,

At both ends of the analysis tube 1, the first frame 10 having the inlet 10a and the second frame 20 having the outlet 20a are screwed together.

The third and fourth frames 70 and 80 are coupled to the first and second frames 10 and 20 by bolts 100, but the surfaces of the first and second frames 10 and 20 may be combined with each other. The first and second flow path grooves 10b and 20b which guide the injection or discharge of gas while the width thereof becomes wider so that their cross-sections have a thin rectangular shape equal to the diameters of the injection hole 10a and the discharge hole 20a, respectively. Form the

The first and second sheet metal covers 30 and 40 are coupled to the third and fourth frames 70 and 80 by screws 100 to shield external noise when measuring exhaust gas.

The first sheet metal cover 30 includes a first lens 32 having a first printed circuit board 31 having a first connector 31a for circuit connection and one end of the analysis tube 1, and a first lens 32. Infrared emitting means (33) is supported by the first support (33a) to emit infrared light into the analysis tube (1) through the lens 32,

The second sheet metal cover 40 has a second printed circuit board 41 having a second connector 41a for circuit connection, a second lens 42 sealing the other end of the analysis tube 1, and a gas passage. And a detection sensor 43 supported by the second support 43a to detect infrared rays emitted to the outside of the analysis tube 1 through the second lens 42 in a state where a unique wavelength is absorbed. have.

According to another aspect, a heating unit 90 may be formed on the circumferential surface of the second support 43a, which is generated during analysis of gas data through a gas analyzer by maintaining the detection sensor 43 at a constant temperature. This is to prevent a data detection error of the detection sensor 43 due to the temperature fluctuation.

Here, the infrared rays detected by the detection sensor 43 are transmitted to the analysis circuit (not shown) through the second connector 41a formed on the second printed circuit board 41 of the second sheet metal cover 40. As a result, the amount of gas can be accurately measured.

Hereinafter, reference numeral 50, which is not described, provides a sealing property when the first frame 10 and the third frame 70 or the second frame 20 and the fourth frame 80 are coupled through the screw 100, respectively. The first O-ring to

Unexplained reference numeral 60 denotes the first and second frames 10 and 20 and the analysis tube when the first and second frames 10 and 20 are screwed to both ends of the analysis tube 1. The second O-ring for providing the sealability of (1) is shown.

Referring to Figures 2 and 3 attached to the operation of one embodiment of the present invention configured as described above are as follows.

First, the first frame 10 having the injection port 10a and the second frame 20 having the discharge port 20a are respectively screwed together at both ends of the analysis tube 1 of the gas analyzer for measuring the exhaust gas of the vehicle. Let's do it.

Here, the first and second frames 10 and 20 and the analysis tube 1 are kept closed by the second O-ring 60.

Thereafter, the third and fourth frames 70 and 80 are coupled to the first and second frames 10 and 20 with screws 100, respectively, and the third and fourth frames 70 ( 80, the first and second sheet metal cover 30, 40 is coupled to each of the screws (100).

Then, the first and second flow path grooves 10b and 20b formed in the first and second frames 10 and 20, respectively, have a thin rectangular cross section whose diameter is equal to the diameter of the injection hole 10a and the discharge hole 20a. It has a shape to guide the injection or discharge of the gas.

Here, the first and second frames 10 and 20 and the third and fourth frames 70 and 80 are sealed by the first O-ring 50.

At this time, the first sheet metal cover 30 has a first lens 32 for sealing one end of the first printed circuit board 31 and the analysis tube 1 having the first connector 31a for circuit connection, and The infrared emitting means 33 supported by the first support 33a is formed to emit infrared rays into the analysis tube 1 through the first lens 32.

In addition, the second sheet metal cover 40 has a second printed circuit board 41 having a second connector 41a for circuit connection and a second lens 42 sealing the other end of the analysis tube 1, When the detection sensor 43 supported by the second support 43a is formed to detect infrared rays emitted to the outside of the analysis tube 1 through the second lens 42 in a state in which a unique wavelength is absorbed from the gas. The assembly of the gas analyzer for measuring the exhaust gas is completed.

Therefore, when the gas is injected into the analysis tube 1 through the injection port 10a of the gas analyzer assembled as described above, the injected gas has a thin rectangular shape such as the diameter of the injection port 10a and the discharge port 20a. The flow is guided through the first and second flow path grooves 10b and 20b formed without vortex.

At this time, when the gas is injected and discharged to the discharge port (10b) through the injection port (10a), the infrared ray emitted from the infrared emission sensor 33 through the first lens 32 inside the analysis tube (1) Incoming bar,

The infrared rays are input to the detection sensor 43 through the second lens 42 in a state where a unique wavelength is absorbed from the gas flowing in the analysis tube 1.

Therefore, the detection sensor 43 detects the amount of infrared rays emitted to the outside of the analysis tube 1 through the second lens 42 in a state where a unique wavelength is absorbed from the gas, and then detects the detected information in a second state. It is transmitted to the analysis circuit (not shown) through the second connector (41a) formed on the second printed circuit board 41 of the sheet metal cover 40,

In the analysis circuit, accurate analysis data on the exhaust gas of the vehicle can be obtained.

On the other hand, when the heating unit 90 is formed on the circumferential surface of the second support 43a supporting the detection sensor 43, the heating unit 90 maintains the detection sensor 43 at a constant temperature By doing so, it is possible to prevent the detection error of data due to the temperature fluctuation of the detection sensor 43.

As described above, the present invention shields the external noise through the sheet metal cover, and maintains the emission of infrared rays uniformly and uniformly so that the measurement of the exhaust gas can be precisely performed, and injected into the analysis tube. While preventing the vortex of the gas while preventing the error of the analysis data due to the remaining gas, and also ensures that the gas injection into the analysis tube is kept constant so that the analysis of the gas is made precisely, while chopping the exhaust gas as in the prior art This makes it possible to miniaturize the gas analyzer by eliminating the use of choppers and motors that physically produce frequency for the purpose.

The present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (2)

In the gas analyzer having an analysis tube to measure the exhaust gas of the vehicle, At both ends of the analysis tube, the first frame having an inlet and the second frame having an outlet are screwed together. The third and fourth frames are coupled to the first and second frames by bolts, and the widths of the first and second frames are gradually increased so that the cross-sectional areas of the first and second frames have a thin rectangular shape equal to the diameter of the inlet and outlet. Forming first and second flow path grooves for guiding injection or discharge of the Screwing the first and second sheet metal cover to the third and fourth frame to shield the external noise when measuring the exhaust gas, respectively, The first sheet metal cover has a first printed circuit board having a first connector for circuit connection, a first lens sealing one end of the analysis tube, and a first support to emit infrared rays into the analysis tube through the first lens. Forming an infrared emitting means supported by The second sheet metal cover includes a second printed circuit board having a second connector for circuit connection, a second lens for sealing the other end of the analysis tube, and an analysis tube through the second lens in a state in which a unique wavelength is absorbed from the gas. A gas analyzer comprising a detection sensor supported by a second support to detect infrared rays emitted to the outside of the apparatus. The gas analyzer of claim 1, wherein a heating unit is formed on a circumferential surface of the second support to prevent a detection error of data due to temperature fluctuation by maintaining a detection sensor at a constant temperature.