Calibration wheel, gas analyzer with automatic calibration function, and method of use

Abstract

The application relates to the technical field of gas component detection, and more particularly to a calibration wheel, a gas analyzer with an automatic calibration function and a use method. In some embodiments of the application, the gas analyzer is integrated with the calibration wheel, the calibration of the gas analyzer can be completed in time through the control of the controller on the calibration wheel, the standard gas cylinder for storage is omitted, the occupation of the site is reduced, and the labor intensity is also reduced. In the application, the standard gas is sealed in the calibration wheel and can be repeatedly used, so that the environmental pollution caused by the discharge of the standard gas is reduced. In the application, the automatic calibration of the gas analyzer is realized through the configuration of the calibration wheel and the zero gas generator and the control of the controller.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas component detection, and more particularly to a calibration wheel, a gas analyzer with automatic calibration function and a use method. BACKGROUND

[0002] When infrared light irradiates gas molecules, if the vibration frequency of the group of the gas molecules is consistent with the frequency of the infrared light, the energy of the infrared light is transmitted to the gas molecules through the change of the molecular dipole moment, which is manifested as the group absorbing infrared light of a certain frequency to produce vibration transition. The infrared gas analyzer utilizes different gas molecules to selectively absorb infrared light of different wavelengths, and according to the infrared spectrum, the to-be-detected gas can be qualitatively and quantitatively analyzed. Before use and during operation, the gas analyzer needs to be calibrated regularly or irregularly, including zero calibration, full-scale calibration, and linear calibration, so as to keep the error of the instrument within the specified range.

[0003] In the prior art, a separate zero gas generator or a steel cylinder of zero gas (such as high-purity nitrogen or air without the to-be-detected component) needs to be provided for zero calibration. The standard gas with a concentration of (80-100) % F.S. (Full Scale, instrument full scale) is usually used for full-scale calibration, and a plurality of standard gases with different concentrations need to be provided for linear calibration. In the above zero calibration, full-scale calibration and linear calibration processes, a plurality of steel cylinders of standard gases with different concentrations need to be provided, which not only occupies the site but also has safety hazards. In addition, manual calibration that is not timely will affect the accuracy of detection. In the above manual calibration process, the standard gas in the steel cylinder needs to be manually filled into the gas analyzer, which not only increases the labor intensity but also causes environmental pollution due to the emission of the standard gas. SUMMARY

[0004] Therefore, the present application provides a calibration wheel, a gas analyzer with automatic calibration function and a use method to solve one or more technical problems in the prior art. The present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a calibration wheel of a gas analyzer, the calibration wheel comprising a wheel body, the wheel body being provided with:

[0006] a working cell, the working cell being open or sealed with zero gas filled therein;

[0007] a first calibration cell assembly, the first calibration cell assembly comprising at least two first calibration cells, and each of the first calibration cells being used to seal standard gas with the same concentration filled therein;

[0008] The wheel body is configured to, when the gas analyzer is in a calibration mode, sequentially enter at least two of the first calibration cells into the light path to obtain at least two first calibration values, compare the first calibration values, and if the difference between two of the first calibration values meets a preset condition, select one of the first calibration values for calibration of the gas analyzer; when the gas analyzer is in a detection mode, the working cell enters the light path to detect a to-be-detected gas.

[0009] In some embodiments, the calibration wheel further comprises:

[0010] a second calibration cell assembly comprising at least two second calibration cells, and each of the second calibration cells is configured to seal the same concentration of standard gas filled therein; the concentration of the standard gas filled in the second calibration cells is different from the concentration of the standard gas filled in the first calibration cells;

[0011] a third calibration cell assembly comprising at least two third calibration cells, and each of the third calibration cells is configured to seal the same concentration of standard gas filled therein; the concentration of the standard gas filled in the third calibration cells is different from the concentration of the standard gas filled in the first calibration cells and the concentration of the standard gas filled in the second calibration cells;

[0012] The wheel body is configured to, when the gas analyzer is in a calibration mode, sequentially enter at least two of the second calibration cells into the light path to obtain at least two second calibration values, compare the second calibration values, and if the difference between two of the second calibration values meets a preset condition, select one of the second calibration values for calibration of the gas analyzer; sequentially enter at least two of the third calibration cells into the light path to obtain at least two third calibration values, compare the third calibration values, and if the difference between two of the third calibration values meets a preset condition, select one of the third calibration values for calibration of the gas analyzer.

[0013] In some embodiments, the number of the first calibration cells, the second calibration cells, and the third calibration cells is two.

[0014] In some embodiments, the wheel body is provided with a mounting hole for connecting an output shaft of a motor, the motor drives rotation of the wheel body to make the working cell enter the light path, and the motor drives each of the first calibration cells, each of the second calibration cells, and each of the third calibration cells to enter the light path.

[0015] In some embodiments, the first calibration cell assembly, the second calibration cell assembly, and the third calibration cell assembly are sequentially distributed on the wheel body to facilitate comparison of the first calibration values, the second calibration values, and the third calibration values.

[0016] In a second aspect, embodiments of the present application provide a zero gas generator, which comprises a filler tube filled with a filler for removing a gas component to be measured in air;

[0017] The zero gas generator is connected with a flow meter, and the controller acquires a total flow of the flow meter, compares the total flow with a preset flow, and performs a reminding operation if the total flow is close to the preset flow; or

[0018] The controller is provided with a preset time, and the controller performs a reminding operation when the preset time is approached.

[0019] In some embodiments, the zero gas generator further comprises:

[0020] A shell, which is formed with a recess;

[0021] A plug-in part, which is detachably plugged into the recess, and comprises an upper baffle, a lower baffle, a front panel, a rear baffle, and a recess formed between the upper baffle, the lower baffle, the front panel, and the rear baffle;

[0022] The filler tube is detachably connected to the plug-in part and placed in the recess;

[0023] The shell, the plug-in part, and the filler tube are configured such that, when the plug-in part is plugged into the recess, the filler tube is plugged into the recess following the plug-in part, and the recess and the front panel are used to prevent the filler tube from being damaged by knocking; and when the plug-in part is pulled out of the recess, the filler tube is pulled out of the recess following the plug-in part, so as to facilitate replacement of the filler tube or replacement of the filler in the filler tube.

[0024] In a third aspect, embodiments of the present application provide a light guide tube, which is vacuumed or filled with a non-interfering gas, and comprises:

[0025] A cavity, an inner part of which is a light guide cavity wall;

[0026] A first lens, which is sealingly connected to one end of the cavity;

[0027] A second lens, which is sealingly connected to the other end of the cavity;

[0028] The light guide cavity wall is processed by polishing or coating to increase reflection of laser emitted by a laser and reduce loss of the laser.

[0029] The non-interfering gas is a gas that has no effect on detection accuracy or has an effect within an allowable range when the gas analyzer is used to detect a gas to be measured.

[0030] The light pipe is arranged at least between:

[0031] The laser and the detection chamber; or / and

[0032] The detection chamber and the calibration wheel; or / and

[0033] The calibration wheel and the detector.

[0034] The light pipe is straight or curved or bifurcated.

[0035] The light pipe is straight or curved or bifurcated.

[0036] In the fourth aspect, the embodiments of the present application provide a gas analyzer, which at least includes the technical solutions of the first aspect, the second aspect, or the third aspect.

[0037] In the fifth aspect, the embodiments of the present application provide a use method of a gas analyzer.

[0038] In some embodiments, when the gas analyzer is in a calibration mode, the method comprises:

[0039] The zero gas generator obtains air and processes to form zero gas;

[0040] After the zero gas enters the detection chamber, the calibration wheel rotates to make at least two first calibration cells enter the light path in sequence to obtain at least two first calibration values; wherein the wheel body of the calibration wheel is provided with a first calibration cell assembly, the first calibration cell assembly includes at least two first calibration cells, and each first calibration cell is used to seal the same concentration of standard gas filled therein; wherein the light path is the light emitted by the laser that sequentially passes through the detection chamber, the calibration wheel, and reaches the detector;

[0041] The first calibration values are compared, and if the difference between two of the first calibration values meets a preset condition, one of the first calibration values is selected for calibration of the gas analyzer.

[0042] In some embodiments, when the gas analyzer is in a detection mode, the method comprises: after the to-be-detected gas enters the detection chamber, the calibration wheel rotates to make a working cell enter the light path to detect the to-be-detected gas; wherein the working cell is arranged on the wheel body, and the working cell is open or sealed with zero gas filled therein.

[0043] In some embodiments, when the gas analyzer is in a zero setting mode, the method comprises: the zero gas generator obtains air and processes to form zero gas, and after the zero gas enters the detection chamber, the calibration wheel rotates to make a working cell enter the light path to set the gas analyzer to zero.

[0044] In some embodiments, when the gas analyzer is in the calibration mode, further comprising:

[0045] The calibration wheel rotation causes at least two second calibration cells to enter the light path in sequence to obtain at least two second calibration values; wherein the wheel body of the calibration wheel is provided with a second calibration cell assembly, the second calibration cell assembly comprises at least two second calibration cells, and each of the second calibration cells is used to seal the same concentration of standard gas filled therein, the concentration of the standard gas filled in the second calibration cell is different from the concentration of the standard gas filled in the first calibration cell;

[0046] The second calibration values are compared, and if the difference between two of the second calibration values meets a preset condition, one of the second calibration values is selected for the second calibration of the gas analyzer;

[0047] The calibration wheel rotation causes at least two third calibration cells to enter the light path in sequence to obtain at least two third calibration values; wherein the wheel body of the calibration wheel is provided with a third calibration cell assembly, the third calibration cell assembly comprises at least two third calibration cells, and each of the third calibration cells is used to seal the same concentration of standard gas filled therein, the concentration of the standard gas filled in the third calibration cell is different from the concentration of the standard gas filled in the first calibration cell and the concentration of the standard gas filled in the second calibration cell;

[0048] The third calibration values are compared, and if the difference between two of the third calibration values meets a preset condition, one of the third calibration values is selected for the third calibration of the gas analyzer.

[0049] The beneficial effects brought by some embodiments of the present application are: the gas analyzer is integrated with a calibration wheel, through the control of the controller on the calibration wheel, the calibration of the gas analyzer can be completed in time, the steel cylinder for storing standard gas is saved, the occupation of the site is reduced, and the labor intensity is also reduced. In the present application, the standard gas is sealed in the calibration wheel and can be reused, which reduces the environmental pollution caused by the emission of standard gas. In the present application, through the configuration of the calibration wheel, the zero gas generator and the control of the controller, the automatic calibration of the gas analyzer is realized.

[0050] In the present application, the light guide pipe can increase the reflection of the laser emitted by the laser and reduce or prevent the laser loss caused by the laser attenuation of the interference gas in the air, thereby improving the detection precision and accuracy of the gas analyzer.

[0051] It is to be understood that the details set forth herein do not limit the scope of the embodiments of the application to the preferred embodiments described. Rather, the scope of the embodiments of the application is defined by the appended claims. Other embodiments of the application will be apparent to those of ordinary skill in the art from the following detailed description when considered in conjunction with the accompanying drawings. It is to be understood that the above-referenced disclosure of the application along with subsequent disclosure provided by the description and drawings that follow, and the appended claims, are intended to define the scope of the application and that equivalents are within the scope of the application. BRIEF DESCRIPTION OF DRAWINGS

[0052] Some specific embodiments of the application will now be described in detail by way of example with reference to the drawings. The drawings are for purposes of illustration only and are not intended to limit the scope of the application. The same reference numerals in different drawings identify the same or similar components or parts throughout the text. It should be understood that the drawings are not necessarily to scale. In the drawings:

[0053] Figure 1 System configuration diagram of the gas analyzer of some embodiments of the application, in which the dashed lines represent electrical connections;

[0054] Figure 2 Structure diagram of the calibration wheel of some embodiments of the application;

[0055] Figure 3 Structure diagram of the zero gas generator of some embodiments of the application, in which the insertion of the insertion piece into the recess is shown;

[0056] Figure 4 Structure diagram of the zero gas generator of some embodiments of the application, in which the extraction of the insertion piece from the recess is shown;

[0057] Figure 5 Structure diagram of the light guide of some embodiments of the application, in which the shapes of three light guides are shown;

[0058] Figure 6 Arrangement diagram of the gas inlet and outlet of the light guide of some embodiments of the application, in which the arrangement of the gas inlet and outlet of three light guides is shown;

[0059] Figure 7 Flow chart of the method for using the gas analyzer of some embodiments of the application;

[0060] Figure 8 Flow chart of the method for using the gas analyzer of some other embodiments of the application;

[0061] Explanation of main element symbols:

[0062] 10-Calibration wheel; 11-First calibration pool assembly, 111-First calibration pool a, 112-First calibration pool b; 12-Second calibration pool assembly, 121-Second calibration pool a, 122-Second calibration pool b; 13-Third calibration pool assembly, 131-Third calibration pool a, 132-Third calibration pool b; 14-Working pool; 15-Mounting hole; 16-Wheel body;

[0063] 20-Zero gas generator, 21-Stuffing tube, 22-Housing; 23-Connector, 231-Upper baffle, 232-Lower baffle, 233-Front panel, 234-Rear baffle;

[0064] 30-Optical guide tube, 301-First optical guide tube, 302-Second optical guide tube, 303-Third optical guide tube; 31-First lens, 32-Second lens, 33-Cavity;

[0065] 100-Gas Analyzer. Detailed Implementation

[0066] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings, including many details of the embodiments of this application to aid understanding. The described embodiments are only possible technical implementations of this application and should be considered merely exemplary, not all possible implementations. Similarly, for clarity and conciseness, some descriptions of well-known functions and structures are omitted in the following description.

[0067] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects, not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate, and the objects distinguished by "first," "second," etc., are generally of the same class, not limited in number; for example, the first object can be one or more. In this application, "or / and," "and / or" indicates that the object is at least one of them, and "or" indicates that the object is one of them. "Above," "below," "front," "back," etc., are used to distinguish similar objects, not to describe a specific order or sequence. Figure 4 The coordinates shown are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a particular orientation, or to be constructed and operated in a particular orientation. The term "a plurality of" should be understood as two or more.

[0068] According to a first aspect of this application, a calibration wheel 10 for a gas analyzer 100 is provided, the calibration wheel 10 including a wheel body 16, the wheel body 16 being provided with:

[0069] Working pool 14, wherein the working pool 14 is open or sealed and filled with zero gas;

[0070] The first calibration cell assembly 11 comprises at least two first calibration cells, and each of the first calibration cells is used to seal the same concentration of standard gas filled therein;

[0071] The wheel body 16 is configured to, when the gas analyzer 100 is in a calibration mode, sequentially enter the light path of at least two first calibration cells to obtain at least two first calibration values, compare each of the first calibration values, and if the difference between two of the first calibration values meets a preset condition, select one of the first calibration values for calibration of the gas analyzer 100; when the gas analyzer 100 is in a detection mode, the working cell 14 enters the light path to detect the to-be-detected gas. The to-be-detected gas includes a to-be-detected gas component and can also include other gas components.

[0072] In the present application, the working cell 14 is sealed with zero gas filled therein to improve the detection accuracy of the gas analyzer 100. In the present application, the calibration wheel 10 comprises the working cell 14 and the first calibration cell. The working cell 14 can be used for detection of the to-be-detected gas, and the first calibration cell can be used for calibration of the gas analyzer 100. Thus, the calibration wheel 10 of the present application no longer needs to manually fill zero gas and standard gas into the calibration wheel 10 during detection and calibration processes. Such a design reduces the labor intensity and labor cost required for operation and maintenance. The zero gas is sealed in the working cell 14, and the standard gas is sealed in the first calibration cell. The gas analyzer 100 does not need to frequently fill and discharge zero gas and standard gas during operation. The gas analyzer 100 can be controlled locally or remotely, thereby improving the automation level of the gas analyzer 100. The gas analyzer 100 does not need to frequently fill and discharge zero gas and standard gas during operation, thereby reducing the operation cost and reducing environmental pollution.

[0073] In the present application, at least two first calibration cells are provided to avoid distortion of the detection result caused by leakage of the standard gas in the first calibration cell. The first calibration cells arranged adjacently are filled with the same concentration of standard gas and are mutually compared and verified.

[0074] In some specific embodiments, the calibration wheel 10 is sold separately. The working cell 14 is filled with zero gas and is in a sealed state or is open to the environment. The first calibration cells are filled with the same concentration of standard gas and are in a sealed state.

[0075] The preset condition for the difference of the first calibration values may, in some embodiments, be, for example, that the difference of the first calibration values is within 2%. Of course, other preset conditions may also be set as required.

[0076] In some embodiments, the calibration wheel 10 further comprises:

[0077] The second calibration cell assembly 12 comprises at least two second calibration cells, and each of the second calibration cells is used to seal the same concentration of standard gas filled therein; the concentration of the standard gas filled in the second calibration cells is different from the concentration of the standard gas filled in the first calibration cells;

[0078] The third calibration cell assembly 13 comprises at least two third calibration cells, and each of the third calibration cells is used to seal the same concentration of standard gas filled therein; the concentration of the standard gas filled in the third calibration cells is different from the concentration of the standard gas filled in the first calibration cells and the concentration of the standard gas filled in the second calibration cells;

[0079] The wheel body 16 is configured such that, when the gas analyzer 100 is in the calibration mode, the at least two second calibration cells enter the light path in turn to obtain at least two second calibration values, the second calibration values are compared, and if the difference between two of the second calibration values meets the preset condition, one of the second calibration values is selected for calibration of the gas analyzer 100; the at least two third calibration cells enter the light path in turn to obtain at least two third calibration values, the third calibration values are compared, and if the difference between two of the third calibration values meets the preset condition, one of the third calibration values is selected for calibration of the gas analyzer 100. Through such a configuration, the linear calibration of the gas analyzer 100 is completed.

[0080] In the present application, when only one calibration cell assembly, such as the first calibration cell assembly 11 or the second calibration cell assembly 12 or the third calibration cell assembly 13, is provided, the gas analyzer 100 can be calibrated at a single point. When two or more calibration cell assemblies are provided, single-point calibration and multi-point calibration can be performed, and when the number of calibrations is three or more, it is also referred to as linear calibration. Of course, more calibration cell assemblies can also be provided as required for detection accuracy, for example, a fourth calibration cell assembly is provided, and similarly, the fourth calibration cell assembly comprises at least two fourth calibration cells, and each of the fourth calibration cells is used to seal the same concentration of standard gas filled therein. In some embodiments of the present application, if no different meanings are derived according to the technical solutions, the accuracy and the precision have the same meaning, indicating the closeness between the result and the true value. In the present application, the concentrations of the standard gas filled in the calibration cells of different calibration cell assemblies are different to achieve multi-point calibration.

[0081] Figure 2 A structural schematic diagram of the calibration wheel 10 for some embodiments of the present application is shown in FIG. 1. Some embodiments of the present application include a first calibration pool assembly 11, a second calibration pool assembly 12, a third calibration pool assembly 13, a working pool 14, and a mounting hole 15 disposed on a wheel body 16. Figure 2 As shown, the number of the first calibration pool, the second calibration pool, and the third calibration pool is two, respectively, which are the first calibration pool a111, the first calibration pool b112, the second calibration pool a121, the second calibration pool b122, the third calibration pool a131, and the third calibration pool b132. The first calibration pool assembly 11 is composed of the first calibration pool a111 and the first calibration pool b112, the second calibration pool assembly 12 is composed of the second calibration pool a121 and the second calibration pool b122, the third calibration pool assembly 13 is composed of the third calibration pool a131 and the third calibration pool b132, the working pool 14, and the mounting hole 15 disposed on the wheel body 16. In other embodiments, a larger number of first calibration pools or second calibration pools or third calibration pools can also be included, for example, the first calibration pool assembly 11 includes the first calibration pool a111, the first calibration pool b112, and a first calibration pool c. Thus, if the difference between the three first calibration values measured meets the preset condition, any first calibration value is selected for the calibration of the gas analyzer 100, or the first calibration value of the intermediate value can also be selected for the calibration of the gas analyzer 100 to further improve the detection accuracy of the gas analyzer 100.

[0082] In some embodiments of the present application, the first calibration pool assembly 11, the second calibration pool assembly 12, and the third calibration pool assembly 13 are arranged in the order of the first calibration pool assembly 11, the second calibration pool assembly 12, and the third calibration pool assembly 13 on the wheel body 16. Figure 2 In the embodiment shown, the mounting hole 15 is disposed at the center of the wheel body 16, and the mounting hole 15 is used to connect the output shaft of the motor. Under the control of the controller, the motor drives the wheel body 16 to rotate to make the working pool 14 enter the light path, and the motor drives each of the first calibration pool, each of the second calibration pool, and each of the third calibration pool to enter the light path.

[0083] In some embodiments of the present application, the first calibration pool assembly 11, the second calibration pool assembly 12, and the third calibration pool assembly 13 are arranged in the order of the first calibration pool assembly 11, the second calibration pool assembly 12, and the third calibration pool assembly 13 on the wheel body 16. Figure 2 In the embodiment shown, the first calibration pool assembly 11, the second calibration pool assembly 12, and the third calibration pool assembly 13 are arranged in the order of the first calibration pool assembly 11, the second calibration pool assembly 12, and the third calibration pool assembly 13 on the wheel body 16, which facilitates the comparison of each of the first calibration value, each of the second calibration value, and each of the third calibration value. Taking the first calibration pool assembly 11 as an example, after the first calibration pool a111 enters the light path to obtain a first calibration value, the calibration wheel 10 only needs to rotate a small angle to make the first calibration pool b112 enter the light path to obtain another first calibration value. Such a design can compare two first calibration values in time, and also reduces the power consumption required for the rotation of the calibration wheel 10 when single-point calibration is performed. Similarly, when the first calibration pool assembly 11 includes the first calibration pool a111, the first calibration pool b112, and a first calibration pool c, the first calibration pool a111, the first calibration pool b112, and the first calibration pool c are arranged adjacent to each other.

[0084] In some embodiments of the present application, the first calibration pool assembly 11, the second calibration pool assembly 12, and the third calibration pool assembly 13 are arranged in the order of the first calibration pool assembly 11, the second calibration pool assembly 12, and the third calibration pool assembly 13 on the wheel body 16. Figure 2In the embodiment shown, with the mounting hole 15 as the center, the first calibration pool a111, the first calibration pool b112, the second calibration pool a121, the second calibration pool b122, the third calibration pool a131, the third calibration pool b132, and the working pool 14 are arranged in a ring at equal intervals on the wheel body 16. In this way, the calibration wheel 10 rotates at the same angle each time, which makes it easier to simplify the control of the calibration wheel 10 and to facilitate the motor drive to drive the calibration wheel 10 at a fixed speed.

[0085] According to a second aspect of this application, a zero-gas generator 20 is provided. The zero-gas generator 20 includes a stuffing tube 21 filled with packing material, which is used to remove the target gas component from the air through adsorption, reaction, separation, or other methods. The zero-gas generator 20 is connected to a flow meter, and a controller acquires the total flow rate of the flow meter and compares it with a preset flow rate. If the total flow rate is close to the preset flow rate, an alert is triggered. For example, "close to" could mean the total flow rate reaches 90% or 95% of the preset flow rate.

[0086] exist Figure 1 In the illustrated embodiment, air passes through Figure 1 The air inlet shown enters the zero-gas generator 20, and after the components of the gas to be measured are removed by the stuffing tube 21, zero gas is formed. Removal methods may include adsorption, reaction, separation, etc. The zero-gas generator 20 is connected to a flow meter. The zero gas output from the zero-gas generator 20 flows through the flow meter, which detects the total flow rate of the zero gas. The controller obtains the total flow rate of the zero gas and compares it with a preset flow rate. If the total flow rate is close to the preset flow rate, an alert is triggered. In other embodiments, the flow meter is located in the air inlet pipe, i.e., the flow meter detects the total flow rate of the air, and the controller obtains the total flow rate of the air and compares it with a preset flow rate. If the total flow rate is close to the preset flow rate, an alert is triggered. For example, the total flow rate can be set according to the volume of air that the stuffing in the stuffing tube 21 can process into zero gas. Since the amount of stuffing in the stuffing tube 21 affects the volume of air processed into zero gas, different total flow rates can be set for stuffing tubes 21 containing different masses of stuffing. For example, the alert operation can be performed in... Figure 1 The display screen shows a reminder text and / or reminder image and / or reminder sound. After the packing is replaced or the packing tube 21 is replaced, the reminder text and / or reminder image and / or reminder sound disappear, and the total flow rate is recalculated after the packing is replaced.

[0087] In this way, whether the filler in the filler tube 21 is in the effective working time can be determined by detecting the total flow accumulated by the flow meter connected with the zero gas generator 20, and when the total flow accumulated value approaches the limit value of the zero gas generator 20, i.e., the preset flow, an alarm is given to prompt replacement. For example, the approach can be that the total flow reaches 90%, 95%, etc. of the preset flow.

[0088] It is considered that even when the gas analyzer 100 is not running, Figure 1 Although the air inlet is closed as shown, there is still a possibility that air contacts the filler, which causes the filler to gradually fail or reduce the service life. In some embodiments, the controller is provided with a preset time, and after the use time of the filler tube 21 approaches the preset time, the controller gives a prompt operation. The prompting manner and the measures taken are as described above. For example, the approach can be that the use time, i.e., the total time, reaches 90%, 95%, etc. of the preset time.

[0089] Figure 3 and Figure 4 The structure of the zero gas generator 20 of some embodiments of the present application is shown, and the zero gas generator 20 comprises:

[0090] a housing 22, wherein a recess is formed on the housing 22;

[0091] a plug-in part 23, which is detachably plugged into the recess, and comprises an upper baffle 231, a lower baffle 232, a front panel 233, a rear baffle 234, and a recess formed between the upper baffle 231, the lower baffle 232, the front panel 233, and the rear baffle 234;

[0092] the filler tube 21 is detachably connected to the plug-in part 23 and placed in the recess;

[0093] the housing 22, the plug-in part 23, and the filler tube 21 are arranged such that when the plug-in part 23 is plugged into the recess, the filler tube 21 is plugged into the recess following the plug-in part 23, and the recess and the front panel 233 are used to prevent the filler tube 21 from being damaged by knocking; and when the plug-in part 23 is pulled out of the recess, the filler tube 21 is pulled out of the recess following the plug-in part 23, so as to facilitate replacement of the filler tube 21 or replacement of the filler in the filler tube 21.

[0094] In the present application, the zero gas generator 20 is miniaturized, and the zero gas generator 20 is integrated into the gas analyzer 100 as a part of the gas analyzer 100, which realizes the automation of the calibration of the gas analyzer 100, and is conducive to improving the detection precision and accuracy of the gas analyzer and reducing the labor input.

[0095] The plug-in part 23 of the present application is in the form of a drawer as a whole with the groove formed on the shell 22, and the plug-in part 23 can be pulled out from the groove to avoid disassembling the zero gas generator 20, so that the filler tube 21 can be conveniently replaced or the filler in the filler tube 21 can be conveniently replaced. The plug-in part 23 can protect the filler tube 21 after being inserted into the groove to prevent the filler tube 21 from being damaged by collision.

[0096] For a single component of the to-be-detected gas, the zero gas generator 20 processes the single component of the to-be-detected gas to form zero gas. For example, the gas analyzer 100 detects A gas, and the zero gas generator 20 generates zero gas of the A gas: air passes through the filler tube 21 dedicated to the A gas component in the zero gas generator 20 from the air inlet to obtain zero gas without the A gas component. For a multi-component to-be-detected gas, the zero gas generator 20 processes the multi-component to-be-detected gas to form zero gas.

[0097] The zero gas generator 20 of the present application realizes the life metering and reminding function: the filler life of the zero gas generator 20 is judged through monitoring the flow and statistics of the zero gas generator 20, and the filler is reminded to be replaced. Through analyzing the measurement results of the gas analyzer 100, the feedback of the zero gas quality can be obtained, and the maintenance and repair of the zero gas generator 20 are prompted.

[0098] In the present application, the zero gas generator 20 is built-in in the gas analyzer, so that the steel cylinder for supplying zero gas is no longer needed, which is helpful for the miniaturization of the gas analyzer. In some embodiments, the selected zero gas is nitrogen, for example, when the zero gas generator 20 fails to work, the nitrogen steel cylinder can be connected to the sample gas inlet for emergency use.

[0099] The light guide tube 30 of the present application will be described below.

[0100] At present, there are few transmission media for low-loss infrared light, especially for middle infrared light, and these transmission media have some limitations, for example, the wavelength range is narrow, and they are not suitable for bending, which limits the performance of the infrared spectrum gas analysis device. Moreover, due to the particularity of the middle infrared light source and the few types of middle infrared light guides, part of the light path of the instrument is exposed to the air. For example, when the to-be-detected gas components are CO2 / CO / SO2 / NO / H2O, etc., the influence of the air on the detection results is particularly serious.

[0101] Therefore, according to the third aspect of the present application, a light guide tube 30 is provided, and the light guide tube 30 is in a vacuum or filled with a non-interfering gas;

[0102] The light guide tube 30 is at least arranged between:

[0103] The laser and the detection gas chamber; or / and

[0104] The detection gas chamber and the calibration wheel 10; or / and

[0105] between the calibration wheel 10 and the detector.

[0106] In Figure 1 In the illustrated embodiment, the light pipe 30 is arranged between the laser and the detection chamber, between the detection chamber and the calibration wheel 10, and between the calibration wheel 10 and the detector. The laser light emitted by the laser passes through the first light pipe 301, the detection chamber, the second light pipe 302, the calibration wheel 10, and the third light pipe 303 in sequence before reaching the detector. In this way, the laser light is not exposed to air throughout the entire path, and is not affected by air, thereby avoiding the attenuation of the laser light caused by interfering gases in the air, and improving the detection accuracy of the gas analyzer 100. It will be appreciated that when the light pipe 30 is arranged between the laser and the detection chamber, or between the detection chamber and the calibration wheel 10, or between the calibration wheel 10 and the detector, the attenuation of the laser light caused by interfering gases in the air can be partially avoided.

[0107] The non-interfering gas can be a gas that has no effect or an effect within an allowable range on the detection accuracy when the gas analyzer 100 is used to detect the to-be-detected gas. The non-interfering gas can be a single component or a mixed component. In some embodiments, for example, the non-interfering gas does not contain the to-be-detected gas component. In some embodiments, the to-be-detected gas component is CO2, and the non-interfering gas does not contain CO2. In other embodiments, the non-interfering gas filled is high-purity nitrogen. In yet other embodiments, the non-interfering gas can be the zero gas generated by the zero gas generator 20. For example, the zero gas generator 20 can be in communication with the first light pipe 301, the second light pipe 302, and the third light pipe 303, respectively. The first light pipe 301, the second light pipe 302, and the third light pipe 303 can be provided with one gas inlet and one gas outlet, or the gas inlet and the gas outlet can be shared. In this way, when the zero gas enters the light pipe 30, the air in the light pipe 30 is pushed out. Based on the density relationship between the zero gas and the air, the gas inlet and the gas outlet can be arranged in the same direction or in opposite directions, so that the zero gas can more cleanly push the air out of the light pipe 30.

[0108] Figure 5For some embodiments of the application, a schematic diagram of the light guide tube 30 is shown, in which three shapes of the light guide tube 30 are shown, namely straight, curved, and bifurcated, and the arrows represent the propagation path of the laser. When the light guide tube 30 is curved, the direction of the laser emitted by the laser can be adjusted, so that the laser, the detection chamber, and the calibration wheel 10 can be flexibly arranged, which is beneficial to the miniaturization of the gas analyzer 100. Specifically, the light guide tube 30 includes a cavity 33, the cavity 33 is sealingly connected with a first mirror 31 and a second mirror 32 located at both ends of the cavity 33, and the inside of the cavity 33 is a light guide cavity wall. The light guide cavity wall is polished or coated to increase the reflection of the laser emitted by the laser and reduce the loss of the laser, which can also improve the detection accuracy of the gas analyzer 100. Specifically, the light guide tube 30 can increase the reflection of the laser emitted by the laser and reduce or prevent the laser loss caused by the laser attenuation of the interfering gas in the air, thereby improving the detection accuracy and accuracy of the gas analyzer 100. In some embodiments, the material of the cavity 33 can be a pressure-resistant material such as metal or quartz, which can prevent the light guide tube 30 from shrinking and deforming due to external atmospheric pressure when the inside of the light guide tube 30 is vacuum, or the light guide tube 30 from expanding and deforming due to the pressure of the non-interfering gas filled in the light guide tube 30 being greater than the atmospheric pressure.

[0109] The materials of the first mirror 31 and the second mirror 32 can be light-transmitting materials such as quartz, calcium fluoride, silicon, germanium, etc., which are designed according to the characteristic absorption wavelength of the gas component to be measured, for example, calcium fluoride has high light transmission for different wavelengths of laser. For different components of the gas to be measured, the light guide tube 30 with different materials of the first mirror 31 and the second mirror 32 can be replaced.

[0110] Figure 6 For some embodiments of the application, a schematic diagram of the gas inlet and gas outlet of the light guide tube 30 is shown, in which three arrangements of the gas inlet and gas outlet of the light guide tube 30 are shown. The first way is that a through hole is provided on the cavity 33 of the light guide tube 30, which integrates the functions of the gas inlet and gas outlet, that is, the gas inlet and outlet are both through the through hole. The second way is that a gas inlet and a gas outlet are provided on the cavity 33 of the light guide tube 30, and the gas inlet and the gas outlet can be arranged at different positions, for example, the gas inlet and the gas outlet are both arranged on the cavity 33 of the light guide tube 30. The third way is that a gas inlet and a gas outlet are provided on the cavity 33 of the light guide tube 30, and the gas inlet and the gas outlet are arranged at different positions, for example, the gas inlet is arranged on the cavity 33 of the light guide tube 30, and the gas outlet is arranged on the first mirror 31 or the second mirror 32. Figure 6The gas inlet and the gas outlet can be arranged on the same side of the cavity 33 or on different sides of the cavity 33 according to requirements. In the embodiment in which one gas inlet and one gas outlet are arranged, the gas inlet and the gas outlet should be as far away from each other as possible, so as to reduce the loss of the non-interfering gas due to the escape of the non-interfering gas from the gas outlet and facilitate the cleaner discharge of the air in the light guide tube 30. In some embodiments, the diameter of the gas inlet is greater than the diameter of the gas outlet, which increases the gas pressure of the gas flowing out of the gas outlet, reduces the air flowing back into the light guide tube 30 from the gas outlet, improves the purity of the non-interfering gas filled in the light guide tube 30, and further improves the detection accuracy of the gas analyzer 100. In the first mode and the second mode, a vacuum can be formed in the light guide tube 30 by means of air extraction. In the third mode, the light guide tube 30 is not provided with a gas inlet and a gas outlet, and the light guide tube 30 is filled with non-interfering gas, which can be achieved by sealingly connecting the first mirror 31, the second mirror 32, and the cavity 33 in a non-interfering gas environment. Figure 6 The light guide tube 30 shown in the middle is straight, and it can be understood that the light guide tube 30 can also be curved or branched, and the corresponding gas inlet and gas outlet arrangement modes can be adopted.

[0111] It should be noted that the embodiments in the first aspect, the second aspect, and the third aspect of the present application and the features in the embodiments can be combined with each other without conflict, and have corresponding technical effects.

[0112] According to the fourth aspect of the present application, a gas analyzer 100 is provided, which at least includes the technical solutions of one of the first aspect, the second aspect, and the third aspect.

[0113] Figure 1 The system configuration diagram of the gas analyzer 100 of some embodiments of the present application is shown, in which the dashed lines represent electrical connections. The controller is electrically connected with the flow meter, the sampling pump, the motor, the electromagnetic valve, the laser, and the detector, and controls the opening and closing of these components. The virtual keys of the opening and closing of these components can be displayed on the display screen connected with the controller. The zero gas generator 20 is sequentially connected with the flow meter, the sampling pump, the detection gas chamber (when the first end A and the second end B of the electromagnetic valve are communicated), and the sample gas outlet. The light guide tube 30 is arranged between the laser, the detection gas chamber, the calibration wheel 10, and the detector, and the motor drives the calibration wheel 10 to rotate under the control of the controller.

[0114] In the present application, the calibration wheel 10 comprises a working cell 14 and a first calibration cell, the working cell 14 can be used for detection of the to-be-tested gas and zero calibration of the gas analyzer, and the first calibration cell can be used for calibration of the to-be-tested gas by the gas analyzer 100. Thus, the calibration wheel 10 of the present application no longer needs manual filling of zero gas and standard gas in the detection and calibration processes, which reduces the labor intensity and labor cost required for operation and maintenance. The zero gas is sealed in the working cell 14 or exposed to the environment in an open manner, and the standard gas is sealed in the first calibration cell. The gas analyzer 100 does not need to be frequently filled with zero gas and standard gas during operation. The gas analyzer 100 can be controlled locally or remotely, which improves the automation level of the gas analyzer 100, and personnel do not need to be on site for calibration operation on a regular or irregular basis, which reduces the on-site work frequency of personnel. Since the sealed standard gas in the calibration wheel 10 of the present application can be fully used, the amount of standard gas is greatly reduced.

[0115] The plug 23 of the present application can be pulled out of the groove to facilitate replacement of the filler tube 21 or replacement of the filler in the filler tube 21; and the plug 23 can protect the filler tube 21 after being inserted into the groove, preventing the filler tube 21 from being damaged by impact.

[0116] The light guide tube 30 of the present application is arranged between the laser and the detection gas chamber, or / and between the detection gas chamber and the calibration wheel 10, or / and between the calibration wheel 10 and the detector, which can reduce or prevent laser attenuation caused by interference gases in the air, and improves the detection accuracy of the gas analyzer 100.

[0117] Based on the same concept, the fifth aspect of the present application provides a use method of the fourth aspect gas analyzer 100. The use method of the gas analyzer 100 also has the technical effects of the fourth aspect gas analyzer 100, which will not be described here.

[0118] In some embodiments, as shown in Figure 7 a use method of a gas analyzer 100 is provided, specifically a single-point calibration method 700. When the gas analyzer 100 is in a calibration mode, the single-point calibration method 700 comprises:

[0119] S701, the zero gas generator 20 obtains air and processes the air to form zero gas;

[0120] S702, after the zero gas enters the detection gas chamber, the calibration wheel 10 rotates to make at least two first calibration cells enter the light path in turn to obtain at least two first calibration values. Wherein, the first calibration cell assembly 11 is arranged on the wheel body 16 of the calibration wheel 10, the first calibration cell assembly 11 includes at least two first calibration cells, and each first calibration cell is used to seal the same concentration of standard gas filled therein; wherein, the light path can be the path of the light emitted by the laser which sequentially passes through the detection gas chamber, the calibration wheel 10 and reaches the detector.

[0121] S703, compare each first calibration value; if the difference between two first calibration values meets the preset condition, use one of the first calibration values for the calibration of the gas analyzer 100.

[0122] In some embodiments, as shown in Figure 8 Another method for using the gas analyzer 100 is provided, specifically a linear calibration method 800, when the gas analyzer 100 is in the calibration mode, the linear calibration method 800 includes:

[0123] S801, obtain at least two first calibration values of the first calibration cell assembly 11, if the difference between two first calibration values meets the preset condition, use one of the first calibration values for the first calibration of the gas analyzer 100, for details, refer to S701-S703.

[0124] S802, obtain at least two second calibration values of the second calibration cell assembly 12, if the difference between two second calibration values meets the preset condition, use one of the second calibration values for the second calibration of the gas analyzer 100. Specifically, the calibration wheel 10 rotates to make at least two second calibration cells enter the light path in turn to obtain at least two second calibration values; wherein, the second calibration cell assembly 12 is arranged on the wheel body 16, the second calibration cell assembly 12 includes at least two second calibration cells, and each second calibration cell is used to seal the same concentration of standard gas filled therein, the concentration of the standard gas filled in the second calibration cell is different from the concentration of the standard gas filled in the first calibration cell; compare each second calibration value; if the difference between two second calibration values meets the preset condition, use one of the second calibration values for the second calibration of the gas analyzer 100.

[0125] S803, obtaining at least two third calibration values of the third calibration cell assembly 13, if the difference between two third calibration values meets the preset condition, selecting one of the third calibration values to perform the third calibration of the gas analyzer 100. Specifically, the calibration wheel 10 rotates to make at least two third calibration cells enter the light path in turn to obtain at least two third calibration values; wherein the wheel body 16 of the calibration wheel 10 is provided with the third calibration cell assembly 13, the third calibration cell assembly 13 includes at least two third calibration cells, and each third calibration cell is used to seal the same concentration of standard gas filled therein, the concentration of the standard gas filled in the third calibration cell is different from the concentration of the standard gas filled in the first calibration cell and the concentration of the standard gas filled in the second calibration cell; comparing each third calibration value; if the difference between two third calibration values meets the preset condition, selecting one of the third calibration values to perform the third calibration of the gas analyzer 100.

[0126] In some embodiments, a method for using the gas analyzer 100 is provided, specifically a method for detecting a to-be-detected gas. When the gas analyzer 100 is in a detection mode, the method comprises: after the to-be-detected gas enters the detection gas chamber, the calibration wheel 10 rotates to make the working cell 14 enter the light path to perform detection of the to-be-detected gas; wherein the working cell 14 is arranged on the wheel body 16, and the working cell 14 is open or sealed with zero gas filled therein.

[0127] In some embodiments, a method for using the gas analyzer 100 is provided, specifically a method for detecting a to-be-detected gas. When the gas analyzer 100 is in a detection mode, the method comprises: after the to-be-detected gas enters the detection gas chamber, the calibration wheel 10 rotates to make the working cell 14 enter the light path to perform detection of the to-be-detected gas; wherein the working cell 14 is arranged on the wheel body 16, and the working cell 14 is open or sealed with zero gas filled therein.

[0128] The method for using the gas analyzer 100 shown in Figure 1 and Figure 2 is described in detail below. Figure 1 and Figure 2 .

[0129] When the controller controls the gas analyzer 100 to be in a detection mode:

[0130] The controller controls the first end A and the third end C of the electromagnetic valve to be in communication, and the second end B is in a disconnected state. The to-be-detected gas enters the detection gas chamber from the sample gas inlet and is discharged from the sample gas outlet after subsequent detection is completed.

[0131] The controller controls the motor to rotate, and the motor drives the calibration wheel 10 to rotate to make the light path pass through the working cell 14.

[0132] The controller controls the laser to emit laser light, and the laser light sequentially passes through the first light guide pipe 301, the detection gas chamber, the second light guide pipe 302, the working pool 14 of the calibration wheel 10, and the third light guide pipe 303 to reach the detector. The detector converts the optical signal into an electrical signal. The controller processes the electrical signal to form a detection result. The detection result is displayed on the display screen, and the concentration detection of the gas component in the to-be-detected gas is completed.

[0133] When the controller controls the gas analyzer 100 to be in the zero calibration mode:

[0134] The controller controls the electromagnetic valve to be in the communication state between the first end A and the second end B, and the third end C is in the open state. The controller controls the sampling pump to draw air. The air enters the zero gas generator 20 through the air inlet to form zero gas. The zero gas enters the detection gas chamber and is discharged from the sample gas outlet after the subsequent zero calibration is completed.

[0135] The controller controls the motor to rotate, and the motor drives the calibration wheel 10 to rotate to make the light path pass through the working pool 14.

[0136] The controller controls the laser to emit laser light, and the laser light sequentially passes through the first light guide pipe 301, the detection gas chamber, the second light guide pipe 302, the working pool 14 of the calibration wheel 10, and the third light guide pipe 303 to reach the detector. The detector converts the optical signal into an electrical signal. The controller processes the electrical signal to form a detection result. The detection result is displayed on the display screen, and the concentration detection of the gas component in the to-be-detected gas is completed.

[0137] According to the result of the zero gas concentration detection, the zero point of the gas analyzer 100 is calibrated.

[0138] When the controller controls the gas analyzer 100 to be in the full calibration or linear calibration mode:

[0139] The controller controls the electromagnetic valve to be in the communication state between the first end A and the second end B, and the third end C is in the open state. The controller controls the sampling pump to draw air. The air enters the zero gas generator 20 through the air inlet to form zero gas. The zero gas enters the detection gas chamber and is discharged from the sample gas outlet after the subsequent full calibration or linear calibration is completed.

[0140] The controller controls the motor to rotate, and the motor drives the calibration wheel 10 to rotate to make the light path pass through the first calibration pool a111.

[0141] The controller controls the laser to emit laser light, and the laser light sequentially passes through the first light guide pipe 301, the detection gas chamber, the second light guide pipe 302, the working pool 14 of the calibration wheel 10, and the third light guide pipe 303 to reach the detector. The detector converts the optical signal into an electrical signal. The controller processes the electrical signal to form a detection result. The detection result is displayed on the display screen, and the concentration detection of the gas component in the to-be-detected gas is completed.

[0142] The controller controls the motor to rotate, and the motor drives the calibration wheel 10 to rotate so that the light path passes through the first calibration cell b112.

[0143] The controller controls the laser to emit laser light, and the laser light sequentially passes through the first light guide pipe 301, the detection chamber, the second light guide pipe 302, the first calibration cell b112 of the calibration wheel 10, and the third light guide pipe 303, and then reaches the detector. The detector converts the light signal into an electrical signal, and the controller built-in element processes the electrical signal to form a detection result, i.e., a first calibration value. The detection result is displayed on the display screen, and the concentration detection of the standard gas in the first calibration cell b112 is completed.

[0144] The controller compares the two first calibration values. If the difference between the two first calibration values meets the preset condition, it is determined that the first calibration cell a111 and the first calibration cell b112 do not leak. One of the first calibration values is selected for the calibration of the gas analyzer 100, and after the calibration, single-point calibration is completed.

[0145] Similarly, the above process can complete the single-point calibration of the second calibration cell assembly 12 and the single-point calibration of the third calibration cell assembly 13, and form the linear calibration of the gas analyzer 100. According to the concentration of the standard gas filled, any single-point calibration formed at the above can be the full-scale calibration of the gas analyzer 100.

[0146] Thus far, the embodiments of the present application have been described in detail with reference to the accompanying drawings. It should be noted that the implementation manners not shown or described in the drawings or the main text are known to those skilled in the art, and are not described in detail. It should be understood that, in order to simplify the present application and help understand one or more of the aspects, in the above description of the exemplary embodiments of the present application, the features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosure should not be interpreted as reflecting the intention that the claimed present application requires more features than those explicitly recorded in each claim.

[0147] The above description is only for some embodiments of the present application and the explanation of the technical principles used, and does not limit the present application in any form. Those skilled in the art should understand that the disclosure range involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the above disclosure concept. For example, the technical solutions formed by mutually replacing the above features and the technical features disclosed in the present application (but not limited to) having similar functions are also within the protection scope of the present application.

Claims

1. A calibration wheel (10) for a gas analyzer (100), characterized in that The calibration wheel (10) comprises a wheel body (16) provided with: a working pool (14) which is open or sealed with zero gas filled therein; a first calibration pool assembly (11) comprising at least two first calibration pools, each of which is used to seal the same concentration of standard gas filled therein; a second calibration pool assembly (12) comprising at least two second calibration pools, each of which is used to seal the same concentration of standard gas filled therein; the concentration of standard gas filled in the second calibration pool is different from that filled in the first calibration pool; a third calibration pool assembly (13) comprising at least two third calibration pools, each of which is used to seal the same concentration of standard gas filled therein; the concentration of standard gas filled in the third calibration pool is different from that filled in the first calibration pool and that filled in the second calibration pool; When the gas analyzer (100) is in a calibration mode, the wheel body (16) is arranged such that the at least two first calibration pools enter the light path in turn to obtain at least two first calibration values, the first calibration values are compared, if the difference between two of the first calibration values meets a preset condition, one of the first calibration values is selected for calibration of the gas analyzer (100); the at least two second calibration pools enter the light path in turn to obtain at least two second calibration values, the second calibration values are compared, if the difference between two of the second calibration values meets the preset condition, one of the second calibration values is selected for calibration of the gas analyzer (100); the at least two third calibration pools enter the light path in turn to obtain at least two third calibration values, the third calibration values are compared, if the difference between two of the third calibration values meets the preset condition, one of the third calibration values is selected for calibration of the gas analyzer (100); when the gas analyzer (100) is in a detection mode, the working pool (14) enters the light path for detection of the to-be-detected gas.

2. The calibration wheel (10) according to claim 1, wherein: the number of the first calibration pools, the second calibration pools and the third calibration pools is two.

3. The calibration wheel (10) according to claim 1, wherein: the wheel body (16) is provided with a mounting hole (15) at the center, the mounting hole (15) is used to connect the output shaft of a motor, the motor drives the wheel body (16) to rotate to make the working pool (14) enter the light path, and the motor drives each of the first calibration pools, each of the second calibration pools and each of the third calibration pools to enter the light path.

4. The calibration wheel (10) according to claim 3, wherein: The first calibration pool assembly (11), the second calibration pool assembly (12), and the third calibration pool assembly (13) are sequentially distributed on the wheel body (16) to facilitate comparison of the first calibration values, the second calibration values, and the third calibration values.

5. A gas analyzer (100) with automatic calibration function, characterized in that, The gas analyzer (100) comprises a zero gas generator (20), a flow meter, a controller, and the calibration wheel (10) according to any one of claims 1-4, wherein: The zero gas generator (20) comprises a filler tube (21) filled with a filler for removing the gas component to be measured in the air; The zero gas generator (20) is connected with a flow meter, and the controller acquires a total flow of the flow meter, compares a preset flow with the total flow, and performs a reminding operation if the total flow is close to the preset flow; or The controller is provided with a preset time, and the controller performs a reminding operation when the preset time is approached; The zero gas generator (20) further comprises a shell (22) with a groove formed thereon; A plug-in part (23) is detachably plugged into the groove, and the plug-in part (23) comprises an upper baffle (231), a lower baffle (232), a front panel (233), a rear baffle (234), and a recess formed between the upper baffle (231), the lower baffle (232), the front panel (233), and the rear baffle (234); the filler tube (21) is detachably connected to the plug-in part (23) and placed in the recess; The shell (22), the plug-in part (23), and the filler tube (21) are arranged such that, when the plug-in part (23) is plugged into the groove, the filler tube (21) is plugged into the groove following the plug-in part (23), and the groove and the front panel (233) are used to prevent the filler tube (21) from being damaged by knocking; when the plug-in part (23) is pulled out of the groove, the filler tube (21) is pulled out of the groove following the plug-in part (23) to facilitate replacement of the filler tube (21) or replacement of the filler in the filler tube (21).

6. The gas analyzer (100) according to claim 5, characterized in that The gas analyzer (100) further comprises a laser, a detection gas chamber, a detector, and further comprises: A light guide tube (30) is in a vacuum or filled with a non-interfering gas; The light guide tube (30) is arranged at least between: The laser and the detection gas chamber; or / and The detection gas chamber and the calibration wheel (10); or / and The calibration wheel (10) and the detector.

7. A method of using a gas analyzer (100), characterized by, When the gas analyzer (100) is in a calibration mode, it comprises: The zero gas generator (20) obtains air and processes to form zero gas, the zero gas generator (20) includes a filler pipe (21) filled with filler for removing the gas components to be measured in the air; the zero gas generator (20) is connected with a flow meter, the controller obtains the total flow of the flow meter, compares the total flow with the preset flow, and if the total flow is close to the preset flow, the controller performs a reminding operation; or the controller is provided with a preset time, and when the preset time is approached, the controller performs a reminding operation; the zero gas generator (20) further comprises: a shell (22) formed with a recess; a plug-in part (23) detachably plugged into the recess, the plug-in part (23) comprising an upper baffle (231), a lower baffle (232), a front panel (233), a rear baffle (234) and a recess formed between the upper baffle (231), the lower baffle (232), the front panel (233) and the rear baffle (234); the filler pipe (21) is detachably connected to the plug-in part (23) and placed in the recess; the shell (22), the plug-in part (23) and the filler pipe (21) are arranged such that when the plug-in part (23) is plugged into the recess, the filler pipe (21) is plugged into the recess following the plug-in part (23), and the recess and the front panel (233) are used to prevent the filler pipe (21) from being damaged by knocking; when the plug-in part (23) is pulled out of the recess, the filler pipe (21) is pulled out of the recess following the plug-in part (23), so as to facilitate replacement of the filler pipe (21) or replacement of the filler in the filler pipe (21); After the zero gas enters the detection gas chamber, the calibration wheel (10) rotates to make at least two first calibration cells enter the light path in turn to obtain at least two first calibration values; wherein the wheel body (16) of the calibration wheel (10) is provided with a first calibration cell assembly (11), the first calibration cell assembly (11) comprises at least two first calibration cells, and each first calibration cell is used to seal the same concentration of standard gas filled therein; the calibration wheel (10) rotates to make at least two second calibration cells enter the light path in turn to obtain at least two second calibration values; wherein the wheel body (16) is provided with a second calibration cell assembly (12), the second calibration cell assembly (12) comprises at least two second calibration cells, and each second calibration cell is used to seal the same concentration of standard gas filled therein, and the concentration of the standard gas filled in the second calibration cell is different from the concentration of the standard gas filled in the first calibration cell; the calibration wheel (10) rotates to make at least two third calibration cells enter the light path in turn to obtain at least two third calibration values; wherein the wheel body (16) of the calibration wheel (10) is provided with a third calibration cell assembly (13), the third calibration cell assembly (13) comprises at least two third calibration cells, and each third calibration cell is used to seal the same concentration of standard gas filled therein, and the concentration of the standard gas filled in the third calibration cell is different from the concentration of the standard gas filled in the first calibration cell and the concentration of the standard gas filled in the second calibration cell; wherein the light path is the light emitted by the laser which passes through the detection gas chamber, the calibration wheel (10) and reaches the detector in turn; The first calibration values are compared; if the difference between two of the first calibration values meets the preset condition, one of the first calibration values is selected for calibration of the gas analyzer (100); the second calibration values are compared; if the difference between two of the second calibration values meets the preset condition, one of the second calibration values is selected for second calibration of the gas analyzer (100); the third calibration values are compared; if the difference between two of the third calibration values meets the preset condition, one of the third calibration values is selected for third calibration of the gas analyzer (100).

8. The method of use of claim 7, wherein, When the gas analyzer (100) is in the detection mode, it comprises: after the to-be-detected gas enters the detection gas chamber, the calibration wheel (10) rotates to make the working cell (14) enter the light path to detect the to-be-detected gas; wherein the working cell (14) is arranged on the wheel body (16), and the working cell (14) is in an open shape or is sealed with zero gas filled therein; When the gas analyzer (100) is in the zero setting mode, it comprises: the zero gas generator (20) obtains air and processes to form zero gas, after the zero gas enters the detection gas chamber, the calibration wheel (10) rotates to make the working cell (14) enter the light path to set zero for the gas analyzer (100).

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