Gas analyzer

Abstract

A gas analyzer includes: a light emitter that emits light; an analysis unit that analyzes a physical property of the gas to be measured based on an intensity of light emitted from the light emitter and transmitted through the gas to be measured; and the adjusting unit comprises a light-transmitting space, at least one closed container and a switching unit. The closed container allows light emitted from the light emitter to be transmitted through the conditioning gas and enter the analysis unit when arranged in the light-transmitting space and filled with the conditioning gas, and the switching unit is switchable between a first state in which the predetermined closed container is arranged in the light-transmitting space and a second state in which the predetermined closed container is not arranged in the light-transmitting space. A predetermined closed container is not arranged in the light-transmitting space and light emitted from the light emitter is allowed to enter the analysis unit.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Japanese Patent Application No. 2023-035013, filed on March 7, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a gas analyzer. Background Art

[0004] There is known a gas analyzer having a light emitter that emits light, an analyzing unit that analyzes physical properties of a gas to be measured based on the intensity of the light emitted from the light emitter and transmitted through the gas to be measured, and a regulating unit having a regulating gas reservoir for calibration (for example, see Patent Document 1 (PTL 1)). Figure 7 ).

[0005] Reference List

[0006] Patent Literature

[0007] PTL 1:JP 2019-191154 A Summary of the Invention

[0008] Technical issues

[0009] A gas analyzer such as that described above preferably has excellent convenience, speed, and safety in adjustments such as calibration and diagnosis.

[0010] Therefore, an object of the present disclosure is to provide a gas analyzer having excellent convenience, rapidity, and safety in adjustment.

[0011] Solution to the problem

[0012] One aspect of the present disclosure is as follows.

[0013] [1] A gas analyzer comprising:

[0014] a light emitter configured to emit light;

[0015] an analyzing unit configured to analyze a physical property of the gas to be measured based on the intensity of light emitted from the light emitter and transmitted through the gas to be measured; and

[0016] The regulating unit comprises a light-transmitting space, at least one closed container and a switching unit, wherein

[0017] The closed container, when arranged in the light-transmitting space and filled with a conditioning gas, allows light emitted from the light emitter to transmit through the conditioning gas and enter the analysis unit, and

[0018] The switching unit can switch between a first state in which a predetermined closed container is arranged in the light-transmitting space and a second state in which no predetermined closed container is arranged in the light-transmitting space and light emitted from the light emitter is allowed to enter the analyzing unit.

[0019] [2] The gas analyzer according to [1], wherein, in the second state, closed containers other than the predetermined closed container are arranged in the light-transmitting space.

[0020] [3] The gas analyzer according to [1], wherein in the second state, the closed container is not arranged in the light-transmitting space.

[0021] [4] The gas analyzer according to [1] or [2], wherein:

[0022] In the second state, closed containers other than the predetermined closed container are arranged in the light-transmitting space, and

[0023] The switching unit is switchable between a first state, a second state, and a third state. In the third state, no closed container is arranged in the light-transmitting space and light emitted from the light emitter is allowed to enter the analyzing unit.

[0024] [5] The gas analyzer according to any one of [1] to [4], wherein

[0025] The at least one closed container included in the regulating unit includes a plurality of closed containers, each closed container is filled with a regulating gas having a different concentration or a different composition, and

[0026] The switching unit is capable of selectively arranging each of the plurality of closed containers in the light-transmitting space.

[0027] [6] The gas analyzer according to [5], wherein the plurality of closed containers include a closed container filled with a range calibration gas for a predetermined gas component as a regulating gas, and a closed container filled with a zero calibration gas for a predetermined gas component as a regulating gas.

[0028] [7] A gas analyzer according to [5], wherein the plurality of closed containers include a closed container filled with a range calibration gas for a predetermined gas component as a regulating gas, a closed container filled with a zero calibration gas for a predetermined gas component as a regulating gas, and a closed container filled with a linearity test / verification gas for a predetermined gas component as a regulating gas.

[0029] [8] A gas analyzer according to any one of [1] to [7], wherein the at least one closed container includes a closed container filled with a light wavelength diagnostic gas component as a regulating gas, and the light wavelength diagnostic gas component is used as a reference for the light wavelength.

[0030] [9] The gas analyzer according to any one of [1] to [8], wherein

[0031] The switching unit includes at least one actuator capable of operating the light-transmitting space and at least one closed container, and

[0032] The switching unit can be switched between a first state and a second state by operation of at least one actuator.

[0033]

[10] The gas analyzer according to [4], wherein:

[0034] The switching unit includes at least one actuator capable of operating the light-transmitting space and at least one closed container, and

[0035] The switching unit can be switched among a first state, a second state, and a third state by operation of at least one actuator.

[0036]

[11] The gas analyzer according to any one of [5] to [8], wherein

[0037] The switching unit includes at least one actuator capable of operating the light-transmitting space and at least one closed container, and

[0038] The switching unit is capable of selectively arranging each of the plurality of closed containers in the light-transmitting space through operation of at least one actuator.

[0039]

[12] The gas analyzer according to any one of [9] to

[11] , wherein the operation of the actuator is rotation.

[0040]

[13] The gas analyzer according to

[12] , wherein

[0041] The actuator comprises a first gear unit,

[0042] The switching unit includes a rotation operation unit including a second gear unit configured to mesh with the first gear unit,

[0043] The actuator is rotated by the rotation of the rotation operation unit, and

[0044] The adjustment unit includes a cover configured to expose a portion of the rotation operation unit and to fully or partially cover the actuator.

[0045]

[14] The gas analyzer according to

[13] further includes a driving unit configured to rotationally drive the rotation operation unit.

[0046]

[15] The gas analyzer according to any one of [9] to

[11] , wherein the operation of the actuator is sliding.

[0047]

[16] The gas analyzer according to any one of [8] to

[15] , wherein

[0048] at least one closed container comprising a plurality of closed containers arranged side by side in the actuator, and

[0049] The operation of the actuator is performed so that the plurality of closed containers are moved in a direction in which the plurality of closed containers are arranged side by side.

[0050]

[17] The gas analyzer according to

[15] , wherein the at least one actuator includes a plurality of actuators capable of independently performing operations.

[0051]

[18] The gas analyzer according to any one of [9] to

[17] , wherein the closed container is detachably arranged in the actuator.

[0052]

[19] A gas analyzer according to

[18] , wherein the actuator includes an actuator body and at least one cover, the closed container can be detachably attached to the at least one cover, and by detachably attaching the cover to the actuator body, the closed container detachably attached to the cover is accommodated in the internal space of the actuator body.

[0053]

[20] The gas analyzer according to any one of [1] to

[19] , wherein the gas analyzer is an opposing gas analyzer in which the light emitter and the analysis unit are arranged on both sides of the gas to be measured.

[0054]

[21] A gas analyzer according to any one of [1] to

[19] , wherein the gas analyzer is a reflective gas analyzer, the reflective gas analyzer including a reflector configured to reflect light emitted from a light emitter and transmitted through the gas to be measured toward an analysis unit, and the light emitter and the analysis unit are arranged on the same side of the gas to be measured.

[0055]

[22] The gas analyzer according to

[21] , wherein:

[0056] The adjustment unit includes an adjustment reflector configured to reflect light and a reflection switching unit capable of switching between a reflection state and a non-reflection state, wherein the adjustment reflector is arranged in the light-transmitting space in the reflection state and the adjustment reflector is not arranged in the light-transmitting space in the non-reflection state.

[0057] In the reflection state, before the light enters the gas to be measured, the adjustment reflector in the first state reflects the light emitted from the light emitter and transmitted through the predetermined closed container, and allows the light to transmit through the predetermined closed container and enter the analysis unit, and

[0058] In the non-reflective state, the adjustable reflector in the second state allows light emitted from the light emitter to be reflected by the reflector and enter the analyzing unit.

[0059]

[23] The gas analyzer according to

[22] , wherein

[0060] The reflection switching unit includes a reflection actuator capable of operating the light-transmitting space and adjusting the reflector, and

[0061] The reflection switching unit can arrange the adjustment reflector in the light-transmitting space by operating the reflection actuator.

[0062]

[24] The gas analyzer according to

[23] , wherein the operation of the reflection actuator is rotation.

[0063]

[25] The gas analyzer according to

[24] , wherein

[0064] The reflective actuator comprises a reflective first gear unit,

[0065] The reflective switching unit includes a reflective rotation operation unit including a reflective second gear unit configured to mesh with the reflective first gear unit.

[0066] The reflection actuator rotates by reflecting the rotation of the rotation operation unit, and

[0067] The adjustment unit includes a reflective cover configured to expose a portion of the reflective rotation operation unit and fully or partially cover the reflective actuator.

[0068]

[26] The gas analyzer according to

[25] further includes a reflection driving unit configured to rotationally drive the reflection rotation operation unit.

[0069]

[27] The gas analyzer according to

[23] , wherein the operation of the reflection actuator is sliding.

[0070]

[28] A gas analyzer according to any one of

[22] to

[27] , wherein the adjustment unit includes a first layer portion having a closed container and a switching unit, a second layer portion having an adjustment reflector and a reflection switching unit, and a light-transmitting space spanning the first layer portion and the second layer portion.

[0071]

[29] The gas analyzer according to any one of [1] to

[28] , wherein the light emitter is a laser oscillator configured to emit laser light of a predetermined wavelength range as the light.

[0072]

[30] The gas analyzer according to any one of [1] to

[29] , wherein the analysis unit performs analysis by absorption spectroscopy.

[0073] Beneficial effects

[0074] According to the present disclosure, a gas analyzer having excellent convenience, rapidity, and safety in adjustment can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] In the attached figure:

[0076] Figure 1A is a front view partially showing a regulating unit in a gas analyzer according to an embodiment;

[0077] Figure 1B yes Figure 1A a rear view of the portion shown;

[0078] Figure 1C yes Figure 1A oblique projection of the portion shown;

[0079] Figure 2 This is a conceptual diagram of a relative gas analyzer;

[0080] Figure 3 This is a conceptual diagram of a reflection gas analyzer;

[0081] Figure 4A Is a Figure 1A A partial cross-sectional projection of the regulating unit of the portion shown;

[0082] Figure 4B yes Figure 4A oblique projection of the portion shown;

[0083] Figure 5A is an oblique projection diagram of another example of an adjustment unit;

[0084] Figure 5B is partially shown Figure 5A A projection of the regulating unit shown;

[0085] Figure 5CIt shows Figure 5A A projection of a cover of a switching unit in the regulating unit and a closed container attached to the cover is shown;

[0086] Figure 5D It shows Figure 5A A projection view of the cover of the switching unit in the regulating unit is shown;

[0087] Figure 6 is a schematic diagram showing the state of the relative gas analyzer when adjusting the measurement point;

[0088] Figure 7 is a schematic diagram showing the state of the reflection gas analyzer when adjusting the measurement point;

[0089] Figure 8 is a schematic diagram showing a state of the relative gas analyzer when adjustment is performed after being removed from a measurement point;

[0090] Figure 9 is a front view of another example of an adjustment unit;

[0091] Figure 10 is a front view of another example of an adjustment unit;

[0092] Figure 11A is a front view showing a first layer portion in another example of an adjustment unit;

[0093] Figure 11B is located in Figure 11A a front view of the second layer portion shown on the back side of the first layer portion;

[0094] Figure 11C is a schematic diagram showing a state of a gas analyzer having an adjustment unit during adjustment. Figure 11A The first layer portion shown and Figure 11B The second floor portion shown;

[0095] Figure 11D It shows Figure 11C A conceptual diagram of the gas analyzer during measurement is shown; and

[0096] Figure 11E It shows Figure 11C A conceptual diagram showing the gas analyzer during adjustment is shown. DETAILED DESCRIPTION

[0097] Embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.

[0098] As shown in Figure 1 to Figure 4BAs shown, the gas analyzer 1 according to the embodiment includes: a light emitter 2 that emits light; an analyzing unit 4 that analyzes the physical properties of the gas 3 to be measured based on the intensity of the light emitted from the light emitter 2 and transmitted through the gas 3 to be measured; and a regulating unit 5 that includes a light-transmitting space 6, at least one closed container 7, and a switching unit 8. When the closed container 7 is arranged in the light-transmitting space 6 and filled with a regulating gas, the light emitted from the light emitter 2 is allowed to be transmitted through the regulating gas and enter the analyzing unit 4, and the switching unit 8 is capable of switching between a first state and a second state, wherein in the first state, the predetermined closed container 7 is arranged in the light-transmitting space 6, and in the second state, the predetermined closed container 7 is not arranged in the light-transmitting space 6 and allows the light emitted from the light emitter 2 to enter the analyzing unit 4.

[0099] According to the above configuration, the switching unit 8 is in the first state to allow adjustment (such as calibration and diagnosis) using the adjustment gas in the predetermined closed container 7, and the switching unit 8 is in the second state to allow adjustment different from the adjustment during the first state, or to allow measurement of the gas 3 to be measured. Therefore, by using the switching unit 8, the convenience, speed and safety of adjustment can be improved. In addition, according to the above configuration, the convenience, speed and safety of adjustment can also be improved by using the closed container 7 for adjustment. Therefore, according to the above configuration, a gas analyzer 1 with excellent convenience, speed and safety in adjustment can be realized. The physical properties of the gas 3 to be measured analyzed by the analysis unit 4 include, for example, the concentration or presence or absence of one or more gas components.

[0100] The following configuration may be adopted: in the second state, a closed container 7 other than the predetermined closed container 7 is arranged in the light-transmitting space 6. According to the above configuration, the switching unit 8 in the first state allows adjustment using the adjustment gas in the predetermined closed container 7, and the switching unit 8 in the second state allows adjustment different from the adjustment during the first state.

[0101] The following configuration can be employed: in the second state, no enclosed container 7 is disposed within the light-transmitting space 6. According to the above configuration, the switching unit 8 in the first state allows for adjustment using the regulated gas within the predetermined enclosed container 7, while the switching unit 8 in the second state allows for measurement of the gas to be measured 3. In this case, the following configuration can also be employed: in the second state, nothing is disposed within the light-transmitting space 6, i.e., in the second state, the light-transmitting space 6 is formed as a cavity.

[0102] The following configuration may be employed: in the second state, a closed container 7 other than the predetermined closed container 7 is arranged in the light-transmitting space 6, and the switching unit 8 is capable of switching between a first state, a second state, and a third state, in which no closed container 7 is arranged in the light-transmitting space 6 and light emitted from the light emitter 2 is allowed to enter the analyzing unit 4. According to the above configuration, the switching unit 8 in the first state allows adjustment using the adjustment gas in the predetermined closed container 7, the switching unit 8 in the second state allows adjustment different from the adjustment during the first state, and the switching unit 8 in the third state allows measurement of the gas 3 to be measured.

[0103] The at least one closed container 7 included in the adjustment unit 5 includes a plurality of closed containers 7, each of which is filled with an adjustment gas having a different concentration or composition, and the switching unit 8 is capable of selectively arranging each of the plurality of closed containers 7 in the light-transmitting space 6. According to the above configuration, a variety of adjustments can be easily performed by the switching unit 8.

[0104] The following configuration may be employed: the plurality of closed containers 7 include a closed container 7 filled with a span calibration gas for a predetermined gas component as a regulating gas, and a closed container 7 filled with a zero calibration gas for a predetermined gas component as a regulating gas. According to the above configuration, span calibration and zero calibration of the predetermined gas component can be easily performed by the switching unit 8. The span calibration gas is a gas containing a predetermined gas component at a predetermined concentration. The zero calibration gas is a gas (e.g., nitrogen) that does not substantially absorb light emitted from the light emitter 2.

[0105] The following configuration may be employed: the plurality of closed containers 7 include a closed container 7 filled with a span calibration gas for a predetermined gas component as a regulating gas, a closed container 7 filled with a zero calibration gas for a predetermined gas component as a regulating gas, and a closed container 7 filled with a linearity test / verification gas for a predetermined gas component as a regulating gas. According to the above configuration, span calibration and zero point calibration of the predetermined gas component, as well as linearity test / verification, can be easily performed by the switching unit 8. The linearity test / verification gas is a gas containing the predetermined gas component at a concentration approximately half that of the span calibration gas.

[0106] The gas analyzer 1 includes a sealed container 7 filled with an optical wavelength diagnostic gas component as a regulating gas, the optical wavelength diagnostic gas component serving as a reference for the optical wavelength. According to the above configuration, a diagnosis of whether the wavelength of the laser light emitted from the light emitter 2 deviates from the reference can be easily performed by the switching unit 8. The peak wavelength of the optical wavelength diagnostic gas component is within the wavelength range of the laser light and is different from the peak wavelength of the component of the gas to be measured 3 included in the gas to be measured 3. The sealed container 7 filled with the optical wavelength diagnostic gas component can be arranged in the light-transmitting space 6, and in this state, the gas to be measured 3 can be measured while the wavelength of the laser light is adjusted to the reference by the optical wavelength diagnostic gas component.

[0107] The switching unit 8 includes at least one actuator 8a capable of operating the light-transmitting space 6 and the at least one closed container 7, and the switching unit 8 can switch between the aforementioned first state and the second state through the operation of the at least one actuator 8a. According to the above configuration, the convenience of the switching operation of the switching unit 8 can be improved.

[0108] The switching unit 8 includes at least one actuator 8a capable of operating the light-transmitting space 6 and the at least one closed container 7, and the switching unit 8 can switch between the aforementioned first state, second state, and third state through the operation of the at least one actuator 8a. According to the above configuration, the convenience of the switching operation of the switching unit 8 can be improved.

[0109] The switching unit 8 includes at least one actuator 8a capable of operating the light-transmitting space 6 and at least one closed container 7, and the switching unit 8 is capable of selectively placing each of the multiple closed containers 7 in the light-transmitting space 6 by operating the at least one actuator 8a. According to the above configuration, the convenience of the switching operation of the switching unit 8 can be improved.

[0110] The operation of the actuator 8a is rotation. According to the above configuration, the convenience of the switching operation of the switching unit 8 can be improved.

[0111] Actuator 8a includes a first gear unit 8a1, switching unit 8 includes a rotary operating unit 8b including a second gear unit 8b1 that meshes with first gear unit 8a1. Rotation of rotary operating unit 8b causes actuator 8a to rotate, and adjustment unit 5 includes a cover 9 that partially exposes rotary operating unit 8b and completely or partially covers actuator 8a. This configuration prevents foreign matter from entering light-transmitting space 6 of adjustment unit 5, thereby improving gas analysis accuracy. Furthermore, by manually operating rotary operating unit 8b, for example from outside cover 9, actuator 8a can be controlled and operated via rotary operating unit 8b.

[0112] A configuration including a drive unit that rotationally drives the rotation operation unit 8b may be adopted. According to the above configuration, the drive unit can operate the actuator 8a via the rotation operation unit 8b. For example, the drive unit is constituted by an actuator such as an electric motor.

[0113] like Figure 9 or Figure 10 As shown, the operation of the actuator 8a can be configured as sliding. According to the above configuration, the convenience of the switching operation of the switching unit 8 can be improved.

[0114] like Figures 1A to 1C As shown, multiple closed containers 7 are arranged side by side in the actuator 8a, and the operation of the actuator 8a is performed so that the multiple closed containers 7 move in the direction in which the multiple closed containers 7 are arranged side by side. According to the above configuration, the convenience of the switching operation of the switching unit 8 can be improved.

[0115] like Figure 9 As shown, the following configuration can be adopted: the operation of the actuator 8a is sliding, the plurality of closed containers 7 are arranged side by side in the actuator 8a, and the operation of the actuator 8a is performed so that the plurality of closed containers 7 move in the direction in which the plurality of closed containers 7 are arranged side by side. According to the above configuration, the convenience of the switching operation of the switching unit 8 can be improved.

[0116] like Figure 10 As shown, the following configuration can be adopted: the operation of the actuator 8a is sliding, and the plurality of actuators 8a can work independently. According to the above configuration, the convenience of the switching operation of the switching unit 8 can be improved.

[0117] like Figures 5A to 5D As shown, the following configuration can be adopted: the closed container 7 is detachably arranged in the actuator 8a. According to the above configuration, by attaching and detaching the closed container 7, various types of adjustments can be performed as needed.

[0118] like Figures 5A to 5D As shown, the following configuration may be employed: the actuator 8a includes an actuator body 10 and at least one cover 11, the closed container 7 can be detachably attached to the cover 11, and by detachably attaching the cover 11 to the actuator body 10, the closed container 7 detachably attached to the cover 11 is accommodated in the internal space of the actuator body 10. According to the above configuration, the convenience of attaching and detaching the closed container 7 can be improved.

[0119] like Figure 5A As shown, the cover 9 may be configured to include a window 9c through which the lid 11 may pass. According to the above configuration, the convenience of attaching and detaching the closed container 7 may be improved.

[0120] like Figure 4AAs shown, the actuator 8a may be configured to include a retainer 12 that hooks the cover 9 to provide resistance to movement each time switching is performed by the switching unit 8. According to the above configuration, the convenience of the switching operation of the switching unit 8 can be improved.

[0121] like Figure 4A As shown, the retainer 12 can be composed of a plurality of holes 12a. The cover 9 can include a cover body 9a, a sliding member 9b having a convex curved tip surface and slidably arranged in the hole provided in the cover body 9a, and a spring, wherein the sliding member 9b has a convex curved tip surface and is slidably arranged in the hole provided in the cover body 9a, and the spring pushes the sliding member 9b toward the inside of the cover 9. Each time switching is performed by the switching unit 8, the tip surface of the sliding member 9b can be configured to selectively enter the plurality of holes 12a serving as the retainer 12. According to the above configuration, the structure of the retainer 12 can be simplified.

[0122] like Figure 2 or Figure 6 As shown, the gas analyzer 1 can be configured as an opposing gas analyzer 1, wherein the light emitter 2 and the analysis unit 4 are arranged on opposite sides of the gas to be measured 3. According to the above configuration, the structure of the gas analyzer 1 can be simplified.

[0123] In the case where the gas analyzer 1 is a relative gas analyzer 1, such as Figure 6 As shown, the adjustment can be performed with the gas analyzer 1 arranged at a position for measuring the gas 3 to be measured, or as shown in FIG. Figure 8 As shown, the adjustment may be performed with the gas analyzer 1 arranged at a position other than the position for measuring the gas 3 to be measured.

[0124] like Figure 3 or Figure 7 As shown, the gas analyzer 1 can be configured as a reflective gas analyzer 1, which includes a reflector 13 that reflects light emitted from the light emitter 2 and transmitted through the gas to be measured 3 toward the analysis unit 4, and the light emitter 2 and the analysis unit 4 can be arranged on the same side of the gas to be measured 3. According to the above configuration, the structure of the gas analyzer 1 can be simplified.

[0125] In case the gas analyzer 1 is a reflective gas analyzer 1, as Figure 7 As shown, the adjustment may be performed with the gas analyzer 1 arranged at a position for measuring the gas 3 to be measured, or may be performed with the gas analyzer 1 arranged at a position other than the position for measuring the gas 3 to be measured.

[0126] like Figures 11A to 11EAs shown, the following configuration can be employed: the adjustment unit 5 includes an adjustment reflector 14 that reflects light and a reflection switching unit 15 that can switch between a reflective state and a non-reflective state. In the reflective state, the adjustment reflector 14 is disposed in the light-transmitting space 6; in the non-reflective state, the adjustment reflector 14 is not disposed in the light-transmitting space 6. In the reflective state, the adjustment reflector 14, in a first state, reflects light emitted from the light emitter 2 and transmitted through the predetermined enclosed container 7 before the light enters the measured gas 3, allowing the light to pass through the predetermined enclosed container 7 and enter the analysis unit 4. In the non-reflective state, the adjustment reflector 14, in a second state, allows the light emitted from the light emitter 2 to be reflected by the reflector 13 and enter the analysis unit 4. With this configuration, the influence of the measured gas 3 on the adjustment can be suppressed by switching the reflection switching unit 15 to the reflective state, thereby improving adjustment accuracy. Measurements can be performed by switching the reflection switching unit 15 to the non-reflective state. Therefore, with this configuration, the adjustment accuracy and ease of adjustment of the gas analyzer 1, which is a reflection gas analyzer 1, can be improved.

[0127] like Figure 11B As shown, the following configuration can be adopted: the reflection switching unit 15 includes a reflection actuator 15a, which can operate the light-transmitting space 6 and the adjustment reflector 14, and the reflection switching unit 15 can arrange the adjustment reflector 14 in the light-transmitting space 6 through the operation of the reflection actuator 15a. According to the above configuration, the convenience of the switching operation of the reflection switching unit 15 can be improved.

[0128] like Figure 11B As shown, the operation of the reflection actuator 15a can be configured to rotate. According to the above configuration, the convenience of the switching operation of the reflection switching unit 15 can be improved.

[0129] like Figure 11B As shown, the following configuration can be employed: the reflective actuator 15a includes a reflective first gear unit 15a1; the reflective switching unit 15 includes a reflective rotational operating unit 15b, which includes a reflective second gear unit 15b1 meshing with the reflective first gear unit 15a1; the reflective actuator 15a rotates by rotation of the reflective rotational operating unit 15b; and the adjustment unit 5 includes a reflective cover that exposes a portion of the reflective rotational operating unit 15b and completely or partially covers the reflective actuator 15a. According to the above configuration, the reflective cover can prevent foreign matter from entering the light-transmitting space 6 of the adjustment unit 5, thereby improving the accuracy of gas analysis. Furthermore, by manually operating the reflective rotational operating unit 15b, for example from outside the reflective cover, the reflective actuator 15a can be controlled via the reflective rotational operating unit 15b, thereby causing the reflective actuator 15a to operate.

[0130] A configuration including a reflection drive unit that rotationally drives the reflection rotation operation unit 15b may be adopted. According to the above configuration, the reflection drive unit can operate the reflection actuator 15a via the reflection rotation operation unit 15b.

[0131] The operation of the reflection actuator 15a may be configured as sliding. According to the above configuration as well, the convenience of the switching operation of the reflection switching unit 15 can be improved.

[0132] like Figures 11A to 11C As shown, the following configuration can be adopted: the adjustment unit 5 includes a first layer portion 16 having a closed container 7 and a switching unit 8, a second layer portion 17 having an adjustment reflector 14 and a reflection switching unit 15, and a light-transmitting space 6 spanning the first layer portion 16 and the second layer portion 17. According to the above configuration, the structure of the adjustment unit 5 having the adjustment reflector 14 and the reflection switching unit 15 can be simplified.

[0133] The light emitter 2 may be configured as a laser oscillator that emits laser light within a predetermined wavelength range as light. According to the above configuration, the accuracy of gas analysis can be improved.

[0134] The analysis unit 4 may be configured to perform analysis by absorption spectroscopy. According to the above configuration, the accuracy of gas analysis can be improved.

[0135] The gas analyzer 1 can be configured to perform on-site analysis in a factory on a process gas or the like as the gas to be measured 3. According to the above configuration, the operation of the factory can be made more efficient.

[0136] The present disclosure is not limited to the above-described embodiments, and may be modified in various ways without departing from the scope of the present disclosure.

[0137] Therefore, various modifications can be made, as long as the gas analyzer 1 includes a light emitter 2 configured to emit light, an analysis unit 3 configured to analyze the physical properties of the gas to be measured 3 based on the intensity of light emitted from the light emitter 2 and transmitted through the gas to be measured 3, and an adjustment unit 5 including a light-transmitting space 6, at least one closed container 7 and a switching unit 8, wherein the closed container 7 allows the light emitted from the light emitter 2 to transmit through the adjusted gas and enter the analysis unit 4 when it is arranged in the light-transmitting space 6 and filled with adjusted gas, and the switching unit 8 is capable of switching between a first state in which a predetermined closed container 7 is arranged in the light-transmitting space 6 and a second state in which the predetermined closed container 7 is not arranged in the light-transmitting space 6 and allows the light emitted from the light emitter 2 to enter the analysis unit 4.

Claims

1. A gas analyzer comprising: a light emitter configured to emit light; an analyzing unit configured to analyze a physical property of the gas to be measured based on the intensity of light emitted from the light emitter and transmitted through the gas to be measured; as well as The regulating unit comprises a light-transmitting space, at least one closed container and a switching unit, wherein The closed container, when arranged in the light-transmitting space and filled with a conditioning gas, allows light emitted from the light emitter to transmit through the conditioning gas and enter the analysis unit, and The switching unit is capable of switching between a first state in which a predetermined closed container is arranged in the light-transmitting space and a second state in which the predetermined closed container is not arranged in the light-transmitting space and light emitted from the light emitter is allowed to enter the analyzing unit.

2. The gas analyzer according to claim 1, wherein In the second state, closed containers other than the predetermined closed container are arranged in the light-transmitting space.

3. The gas analyzer according to claim 1, wherein: In the second state, the closed container is not arranged in the light-transmitting space.

4. The gas analyzer according to claim 1, wherein: In the second state, the closed container other than the predetermined closed container is arranged in the light-transmitting space, and The switching unit is switchable among the first state, the second state, and a third state in which the closed container is not arranged in the light-transmitting space and light emitted from the light emitter is allowed to enter the analyzing unit.

5. The gas analyzer according to claim 1, wherein The at least one closed container included in the regulating unit includes a plurality of closed containers, each of which is filled with a regulating gas having a different concentration or a different composition, and The switching unit is capable of selectively arranging each of the plurality of closed containers in the light-transmitting space. The gas analyzer according to claim 5 , wherein: The plurality of closed containers include a closed container filled with a span calibration gas for a predetermined gas component as the adjustment gas, and a closed container filled with a zero calibration gas for the predetermined gas component as the adjustment gas.

7. The gas analyzer according to claim 5, wherein: The multiple closed containers include a closed container filled with a range calibration gas for a predetermined gas component as the regulating gas, a closed container filled with a zero calibration gas for the predetermined gas component as the regulating gas, and a closed container filled with a linearity test / verification gas for the predetermined gas component as the regulating gas.

8. The gas analyzer according to claim 1, wherein The at least one closed container includes a closed container filled with an optical wavelength diagnostic gas component as a regulating gas, the optical wavelength diagnostic gas component serving as a reference for the optical wavelength.

9. The gas analyzer according to claim 1, wherein: The switching unit includes at least one actuator capable of operating the light-transmitting space and the at least one closed container, and The switching unit is capable of switching between the first state and the second state by operation of the at least one actuator.

10. The gas analyzer according to claim 4, wherein: The switching unit includes at least one actuator capable of operating the light-transmitting space and the at least one closed container, and The switching unit is capable of switching between the first state, the second state, and the third state by operation of the at least one actuator.

11. The gas analyzer according to claim 5, wherein: The switching unit includes at least one actuator capable of operating the light-transmitting space and the at least one closed container, and The switching unit is capable of selectively arranging each of the plurality of closed containers in the light-transmitting space through operation of the at least one actuator.

12. The gas analyzer according to any one of claims 9 to 11, wherein: The operation of the actuator is rotation.

13. The gas analyzer according to any one of claims 9 to 11, wherein: The operation of the actuator is sliding.

14. The gas analyzer according to claim 1, wherein The gas analyzer is a reflection gas analyzer including a reflector configured to reflect light emitted from the light emitter and transmitted through the gas to be measured toward the analysis unit, and the light emitter and the analysis unit are arranged on the same side of the gas to be measured.

15. The gas analyzer according to claim 14, wherein The adjustment unit includes an adjustment reflector configured to reflect light and a reflection switching unit capable of switching between a reflection state and a non-reflection state, wherein the adjustment reflector is arranged in the light-transmitting space in the reflection state and the non-reflection state is not arranged in the light-transmitting space. In the reflective state, before the light enters the gas to be measured, the adjustable reflector in the first state reflects the light emitted from the light emitter and transmitted through the predetermined closed container, and allows the light to transmit through the predetermined closed container and enter the analysis unit, and In the non-reflective state, the adjustable reflector in the second state allows light emitted from the light emitter to be reflected by the reflector and enter the analyzing unit.

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