Greenhouse gas analyzer

Abstract

The utility model discloses a greenhouse gas analyzer which comprises a box body, and a gas analysis device, a first temperature control module and a second temperature control module are arranged in the box body; the gas analysis device comprises a shell, a light source assembly, a detector assembly and a gas chamber pipe, through the arrangement of the first temperature control module and the second temperature control module, the temperature of the gas analysis device and the temperature of the detector assembly are controlled, the influence of the external environment temperature on the detector assembly is reduced, and the detection stability and the detection accuracy of the detector assembly are improved; therefore, the detection structure of the utility model is more accurate and stable.

Description

Technical Field

[0001] The utility model relates to the field of design and manufacture of gas detection instruments, and more specifically, to a greenhouse gas analyzer. Background Art

[0002] A greenhouse gas analyzer is an instrument used to detect greenhouse gases in the atmosphere, such as carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), etc. The core component of a greenhouse gas analyzer is an infrared gas analysis device, which uses the non-dispersive infrared (NDIR) detection principle to detect gas concentrations. This detection technology is greatly affected by temperature, and fluctuations in ambient temperature will affect detection accuracy. Therefore, if high-precision gas detection is to be achieved, it is necessary to control the temperature of the infrared gas analysis device to improve the detection accuracy of the platform.

[0003] In order to improve the detection accuracy of the platform, people will install a temperature control device on the greenhouse gas analyzer to reduce the temperature impact on the greenhouse gas analyzer and improve the accuracy of gas detection; but usually, the greenhouse gas analyzers currently on the market only have a temperature control device installed inside the gas analysis device, and the temperature control device can only perform heating work; when the ambient temperature outside the gas analysis device changes greatly, it will still affect the temperature inside the gas analysis device; at the same time, when the gas analysis device as a whole is in a high temperature environment, the temperature control device that can only perform heating work cannot perform a certain cooling control on the temperature inside the gas analysis device. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art and provides a greenhouse gas analyzer which has a simple structure, a reasonable design, is not susceptible to the influence of external temperature, and can stably control the temperature in the gas analysis device even in a high temperature environment.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0006] It comprises a box body, in which a gas analysis device, a first temperature control module and a second temperature control module are arranged;

[0007] The gas analysis device comprises a housing, a light source assembly, a detector assembly and a gas chamber tube, wherein the light source assembly comprises a light source mounting plate, a light source and a light source mounting seat; the gas chamber tube is provided with through holes penetrating both ends thereof, and a gas chamber is formed by the through holes;

[0008] The first temperature control module and the second temperature control module both include temperature control elements with heating function; the temperature control element of the first temperature control module and / or the temperature control element of the second temperature control module also has a cooling function; and then the temperature of the first space and the second space are controlled respectively by the first temperature control module and the second temperature control module.

[0009] Further, the first temperature control module also includes a radiator, a heat sink and a fan; the heat sink includes a first heat sink and a second heat sink; the radiator includes a first heat sink and a second heat sink, the first heat sink is connected to the first heat sink, and the second heat sink is connected to the second heat sink; the fan includes a first fan and a second fan, the first fan is arranged on the first heat sink, and the second fan is arranged on the second heat sink;

[0010] The first heat sink, the first radiator and the first fan are arranged in the box body; the second heat sink, the second radiator and the second fan are arranged outside the box body.

[0011] Furthermore, the box body and the shell body are both provided with an air inlet and an air outlet, the air inlet and the air outlet of the box body are respectively provided with a first air inlet joint and a first air outlet joint, and the air inlet and the air outlet of the shell body are respectively provided with a second air inlet joint and a second air outlet joint; the first air inlet joint is connected to the second air inlet joint by a pipeline, and the first air outlet joint is connected to the second air outlet joint by a pipeline; the two ends of the air chamber tube are respectively an air inlet end and an air outlet end, the air inlet end cooperates with and communicates with the second air inlet joint, and the air outlet end cooperates with and communicates with the second air outlet joint; the light source assembly is arranged at one end of the air chamber tube close to the air inlet end, and the detector assembly is arranged at one end of the air chamber tube close to the air outlet end;

[0012] A first connector is provided on the box body, and a second connector is provided on the shell body; the light source assembly, the detector assembly, the second temperature control module, the second connector, the first temperature control module and the temperature measurement module realize data transmission with the outside through the cooperation of the first connector, the second connector and the wiring harness.

[0013] Further, the light source mounting plate is mounted on the mounting bottom plate; the light source and the light source mounting seat are both mounted on the light source mounting plate and are located on the surface of the light source mounting plate facing the detector assembly; a light source mounting space is provided in the light source mounting seat, and when the light source mounting seat is mounted on the light source mounting plate, the light source is located in the light source mounting space; a first mounting opening and a first mounting opening communicating with the light source mounting space are respectively provided at both ends of the light source mounting seat, and the light source enters the light source mounting space through the first mounting opening; a lens is installed at the first mounting opening;

[0014] The detector assembly comprises a detector mounting plate, a detector and a detector mounting seat; the detector mounting plate is mounted on the mounting bottom plate; the detector and the detector mounting seat are both mounted on the detector mounting plate and are located on the surface of the detector mounting plate facing the light source assembly; a detector mounting space is provided in the detector mounting seat, and when the detector mounting seat is mounted on the detector mounting plate, the detector is located in the detector mounting space; a second mounting opening and a second mounting opening communicating with the detector mounting space are respectively provided at both ends of the detector mounting seat, and the detector enters the detector mounting space through the second mounting opening; a lens is installed at the second mounting opening;

[0015] The gas analysis device further comprises a first sealing installation sleeve and a second sealing installation sleeve, wherein a sealed inner space is provided in each of the first sealing installation sleeve and the second sealing installation sleeve, and a first installation opening, a second installation opening and a third installation opening are provided on the first sealing installation sleeve and the second sealing installation sleeve;

[0016] The first sealing installation sleeve is arranged on the light source installation seat and is located on the side of the light source installation seat facing the detector assembly; one end of the light source installation seat provided with the first installation opening enters the inner space of the first sealing installation sleeve through the first installation opening of the first sealing installation sleeve; the air inlet end of the air chamber tube enters the inner space of the first sealing installation sleeve through the second installation opening; the second air inlet joint enters the inner space of the first sealing installation sleeve through the third installation opening; a sealing ring is arranged at the place where the light source installation seat, the air chamber tube and the second air inlet joint enter the inner space;

[0017] The second sealing installation sleeve is arranged on the detector mounting seat and is located on the side of the detector mounting seat facing the light source assembly; one end of the detector mounting seat provided with the second installation opening enters the inner space of the second sealing installation sleeve through the first installation opening of the second sealing installation sleeve; the gas outlet end of the air chamber tube enters the inner space of the second sealing installation sleeve through the second installation opening; the second gas outlet joint enters the inner space of the second sealing installation sleeve through the third installation opening; a sealing ring is arranged at the place where the detector mounting seat, the air chamber tube and the second gas outlet joint enter the inner space;

[0018] The light source, air inlet, air chamber, air outlet and detector are in the same straight line;

[0019] The gas to be detected flows from the first air inlet connector to the second air inlet connector, then enters the inner space of the first sealing installation sleeve from the second air inlet connector, and then enters the air chamber tube of the air chamber tube from the inner space of the first sealing installation sleeve through the air inlet hole; the gas to be detected in the air chamber tube leaves the air chamber through the air outlet hole, enters the inner space of the second sealing installation sleeve, and is detected by the detector in the process; the gas after detection flows to the first air outlet connector through the second air outlet connector, and finally flows out of the equipment.

[0020] Furthermore, a temperature control system is provided; the temperature control system comprises an integrated circuit board, a power supply module, a power management module, a voltage reference module and a flow detection module; the power supply module is connected to the integrated circuit board and supplies power to the integrated circuit board; the integrated circuit board is connected to the power management module, the voltage reference module, the first temperature control module, the second temperature control module, the flow detection module and the temperature measurement module, the integrated circuit board supplies power to the power management module, the voltage reference module, the first temperature control module, the second temperature control module and the flow detection module, and the integrated circuit board controls the first temperature control module, the second temperature control module, the flow detection module and the temperature measurement module; the power management module is connected to the flow detection module and the first The temperature control module is connected and outputs an adjusted voltage to the flow detection module and the first temperature control module to meet different voltage requirements; the voltage reference module is connected to the flow detection module and the temperature measurement module, and provides a stable reference voltage to both of them; the first temperature control module includes a TEC refrigeration plate, and the first temperature control module adopts a TEC full-bridge drive circuit; the first temperature control module realizes heating or cooling of the TEC refrigeration plate by controlling the forward and reverse current of the TEC refrigeration plate; the second temperature control module includes a heating plate, and controls the heating plate to heat; the circuit is detected by the temperature measurement module, and the temperature value is obtained; the temperature of the first temperature control module and the second temperature control module is controlled by the obtained temperature value.

[0021] Beneficial effects:

[0022] In the utility model, the box body and the gas analysis device are respectively arranged in different spaces, and there is a gap between the outer wall of the gas analysis device and the inner wall of one of the spaces, so that there is a space separated from the gas analysis device and the outside, thereby reducing the influence of the external ambient temperature on the gas analysis device; at the same time, through the setting of the first temperature control module and the second temperature control module, the temperature of the first space where the gas analysis device is set and the second space where the detector assembly is set are controlled, reducing the influence of the external ambient temperature on the second space, so as to improve the detection stability and detection accuracy of the detector assembly in the second space; making the detection structure of the utility model more accurate and stable.

[0023] In the present invention, by setting the temperature measurement module, the temperature control effect and temperature control accuracy of the first temperature control module and the second temperature control module are further improved, so as to improve the detection stability of the gas analysis device.

[0024] In the utility model, the first temperature control module and the second temperature control module both include a temperature control element with a heating function, so that the utility model can be used in an environment with a low external temperature. When the external environment is low, the first temperature control module and the second temperature control module start the heating function, so that the detector component of the gas analysis device can perform detection work at a more appropriate temperature; at the same time, the temperature control element of the first temperature control module and / or the temperature control element of the second temperature control module also has a cooling function, so that the utility model can also be used in an environment with a high external temperature. When the external environment is low, the cooling function is started to reduce the temperature of the second space from being affected by the external high temperature environment temperature; even in a high temperature environment, the temperature inside the gas analysis device can be stably controlled.

[0025] In the utility model, the temperature control element of the first temperature control module adopts a TEC refrigeration plate, so that the first temperature control module has both heating and cooling functions. The TEC refrigeration plate can heat or cool the gas in the first space according to the detection requirements of the detector component, thereby reducing the influence of the temperature of the second space on the external ambient temperature; through the arrangement of the heat sink, the radiator and the fan, the TEC refrigeration plate can quickly dissipate heat when performing cooling work, so as to reduce the temperature of the first space, thereby reducing the influence of the external high temperature environment on the second space where the detector component is arranged.

[0026] In the utility model, the first fan can not only be used to quickly discharge the hot gas in the first space when the TEC refrigeration plate is cooling; it can also make the gas in the first space flow when the first fan rotates, so that the temperature in each place in the first space is more uniform, reducing the possibility of the second space being affected by the external high temperature environment.

[0027] In the utility model, the gas to be detected is sent into the second space for detection by the detector assembly through the setting of the first air inlet connector, the first air outlet connector, the second air inlet connector and the second air outlet connector, and then the gas that has completed the detection is discharged; wherein, the light source assembly is arranged at one end of the air chamber tube close to the air inlet end, and the detector assembly is arranged at one end of the air chamber tube close to the air outlet end, so that the detector assembly can quickly discharge the gas after completing the detection, thereby making the detection efficiency of the utility model higher.

[0028] In the utility model, different voltages are provided for the first temperature control module and the second temperature control module through the setting and coordination of the integrated circuit board, the power management module and the voltage reference module, so that the first temperature control module and the second temperature control module can heat or cool the first space and the second space according to the detection requirements of the detector component.

[0029] In the utility model, the integrated circuit board is connected to the flow detection module and the temperature measurement module, so that the utility model can assist the detector component in detecting gas data through the data of the gas flow detected by the flow detection module; and the gas flow detected by the flow detection module can assist the first temperature control module and the second temperature control module in heating and cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the entire utility model.

[0031] Figure 2 This is a structural diagram of the utility model after the first shell cover is removed.

[0032] Figure 3 for Figure 1 Horizontal section diagram.

[0033] Figure 4 for Figure 3 Structural diagram of the first temperature control module.

[0034] Figure 5 This is a structural diagram of the gas analysis device.

[0035] Figure 6 Structural diagram of the gas analysis device after removing the second housing cover.

[0036] Figure 7 for Figure 5 Horizontal section diagram.

[0037] Figure 8 This is a structural diagram of one side of the light source mount or detector mount.

[0038] Fig. 9 This is a structural diagram of the other side of the light source mount or detector mount.

[0039] Fig.10 This is a structural diagram of one side of the first sealing installation sleeve or the second sealing installation sleeve.

[0040] Fig.11 This is a structural diagram of the other side of the first sealing installation sleeve or the second sealing installation sleeve.

[0041] Fig.12 Schematic diagram of the temperature control system.

[0042] Fig.13 This is a circuit structure diagram of an integrated circuit board.

[0043] Fig.14 This is the circuit structure diagram of the power management module.

[0044] Fig.15 This is the circuit structure diagram of the voltage reference module.

[0045] Fig.16 This is the circuit structure diagram of the flow detection module.

[0046] Fig.17 for Fig.16 Circuit structure diagram of operational amplifier IC8.

[0047] Fig.18 for Fig.16 The circuit structure diagram of the PWM signal to analog signal converter IC10.

[0048] Fig.19 for Fig.16 Circuit structure diagram of sensor P11 in the middle.

[0049] Fig. 20 for Fig.16 Circuit structure diagram of transistor Q4, transistor Q5 and flow controller J11.

[0050] Fig.21 This is a circuit structure diagram of the first temperature control module.

[0051] Fig. 22 for Fig.21 Circuit structure diagram of the driving chip IC42 and the driving chip IC43.

[0052] Fig.23 for Fig.21 Circuit structure diagram of transistor Q27, transistor Q28, transistor Q29 and transistor Q30.

[0053] Fig.24 This is a circuit structure diagram of the second temperature control module.

[0054] Fig.25 2 is a circuit structure diagram of the first temperature measurement circuit.

[0055] Fig.26 2 is a circuit structure diagram of the second temperature measurement circuit.

[0056] Fig. 27 This is the circuit structure diagram of the third temperature measurement circuit.

[0057] Fig.28 4 is a circuit structure diagram of the fourth temperature measurement circuit.

[0058] Fig.29 It is the circuit structure diagram of the fifth temperature measurement circuit.

[0059] Fig.30 This is a conventional system control block diagram of a PID control program.

[0060] Fig.31 Flowchart for driving TEC operation.

[0061] Numbers in the figure:

[0062] 1. Box; 2. Gas analysis device; 3. First temperature control module; 4. Second temperature control module; 5. Light source assembly; 6. Detector assembly; 7. Gas chamber tube; 8. Temperature measurement module; 9. Temperature control element; 11. First space; 12. First shell; 13. First shell cover; 14. Notch; 15. First air inlet connector; 16. First air outlet connector; 17. First connector; 21. Second space; 22. Shell; 23. Second shell; 24. Second shell cover; 25. Second air inlet connector; 26. Second air outlet connector; 27. Second connector; 28. Mounting base; 31. First heat sink; 32. Second heat sink; 33. First radiator; 34. Second radiator; 35. First Fan; 36. Second fan; 51. Light source mounting plate; 52. Light source; 53. Light source mounting seat; 61. Detector mounting plate; 62. Detector; 63. Detector mounting seat; 71. Air inlet; 72. Air outlet; 73. Air chamber; 74. Air inlet; 75. Air outlet; 100. Lens; 201. First sealing mounting sleeve; 202. Second sealing mounting sleeve; 203. Inner space; 204. First mounting opening; 205. Second mounting opening; 206. Third mounting opening; 531. Light source mounting space; 532. First assembly opening; 533. First mounting opening; 631. Detector mounting space; 632. Second assembly opening; 633. Second mounting opening. DETAILED DESCRIPTION

[0063] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific descriptions of the present invention, and their purpose is to allow those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limiting the present invention.

[0064] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0065] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] Example:

[0067] like Figure 1-11 As shown, a temperature control device of a greenhouse gas analyzer comprises a box body 1 provided with a first space 11, a gas analysis device 2 arranged in the first space 11, a first temperature control module 3 and a second temperature control module 4; the gas analysis device 2 comprises a shell body 22 provided with a second space 21, a light source assembly 5, a detector assembly 6 and a gas chamber tube 7, and the light source assembly 5, the detector assembly 6 and the gas chamber tube 7 are all arranged in the second space 21; the first temperature control module 3 is arranged in the first space 11; the second temperature control module 4 is arranged in the second space 21; the outer wall of the gas analysis device 2 is connected to the first temperature control module 3; the second temperature control module 4 is connected to the second space 21; the outer wall of the gas analysis device 2 is connected to the second temperature control module 4 ... There is a gap between the inner walls of a space 11, so that there is a space separated from the gas analysis device 2 by the outside, thereby reducing the influence of the external ambient temperature on the gas analysis device 2; at the same time, through the setting of the first temperature control module 3 and the second temperature control module 4, the temperature of the first space 11 where the gas analysis device 2 is set and the second space 21 where the detector assembly 6 is set are respectively controlled, reducing the influence of the external ambient temperature on the second space 21, so as to improve the detection stability and detection accuracy of the detector assembly 6 in the second space 21; making the detection structure of the utility model more accurate and stable.

[0068] In this embodiment, the box body 1 includes a first shell 12 and a first shell cover 13. The top of the first shell 12 is provided with an opening, and the first shell cover 13 is detachably assembled at the opening; thereby facilitating the later maintenance and repair of the utility model; the first shell 12 and the first shell cover 13 surround and form a first space 11, and heat insulation cotton is provided on the inner walls of the first shell 12 and the first shell cover 13, thereby reducing the influence of the external temperature on the temperature in the first space 11.

[0069] In some other embodiments, the gas analysis device 2 is detachably disposed in the first space 11 , so that the utility model can replace the gas analysis device 2 or adjust the gas analysis device 2 according to needs.

[0070] In this embodiment, the shell 22 includes a second outer shell 23 and a second shell cover 24. The top of the second outer shell 23 is provided with an opening, and the second shell cover 24 is detachably assembled at the opening, so that people can adjust or maintain the light source assembly 5, the detector assembly 6 and the air chamber tube 7 at a later time; the second outer shell 23 and the second shell cover 24 surround to form a second space 21, and the inner walls of the second outer shell 23 and the second shell cover 24 are provided with heat insulation cotton, thereby reducing the influence of the temperature in the second space 21 on the external temperature.

[0071] In this embodiment, a temperature measuring module 8 is provided in the first space 11 and the second space 21; by providing the temperature measuring module 8, the temperature control effect and temperature control accuracy of the first temperature control module 3 and the second temperature control module 4 are further improved, so as to improve the detection stability and detection accuracy of the gas analysis device 2.

[0072] In the present invention, the first temperature control module 3 and the second temperature control module 4 both include a temperature control element 9 with a heating function; the temperature control element 9 of the first temperature control module 3 and / or the temperature control element 9 of the second temperature control module 4 also have a cooling function; and then the temperature of the first space 11 and the second space 21 are respectively controlled by the first temperature control module 3 and the second temperature control module 4; the first temperature control module 3 and the second temperature control module 4 both include a temperature control element 9 with a heating function, so that the present invention can be used in an environment with a low external temperature. When the external environment is low, the first temperature control module 3 and the second temperature control module 4 start the heating function, so that the detector assembly 6 of the gas analysis device 2 can perform detection work at a more appropriate temperature; at the same time, the temperature control element 9 of the first temperature control module 3 and / or the temperature control element 9 of the second temperature control module 4 also have a cooling function, so that the present invention can also be used in an environment with a high external temperature. When the external environment is low, the cooling function is started to reduce the temperature of the second space 21 from being affected by the external high temperature environment temperature; even in a high temperature environment, the temperature in the gas analysis device 2 can be stably controlled.

[0073] In this embodiment, the temperature control element 9 of the first temperature control module 3 adopts a TEC refrigeration sheet, so that the first temperature control module 3 has both heating and cooling functions. The TEC refrigeration sheet can heat or cool the gas in the first space 11 according to the detection requirements of the detector component 6, thereby reducing the influence of the temperature of the second space 21 on the external ambient temperature; the first temperature control module 3 also includes a radiator, a heat sink and a fan; the heat sink includes a first heat sink 31 and a second heat sink 32, and the first heat sink 31 and the second heat sink 32 are respectively arranged at both ends of the TEC refrigeration sheet; the radiator includes a first heat sink 33 and a second heat sink 34, the first heat sink 33 is connected to the first heat sink 31, and the second heat sink 34 is connected to the second heat sink 32; the fan includes a first fan 35 and a second The fan 36, the first fan 35 is arranged on the first radiator 33, and the second fan 36 is arranged on the second radiator 34; the TEC refrigeration sheet, the first heat sink 31, the first radiator 33 and the first fan 35 are arranged in the first space 11; the second heat sink 32, the second radiator 34 and the second fan 36 are arranged outside the box body 1 for heat dissipation; a notch 14 is arranged on the box body 1, and the TEC refrigeration sheet is arranged at the notch 14; the second heat sink 32 is in contact with the outer surface of the box body 1 and closes the notch 14; through the arrangement of the heat sink, the radiator and the fan, the TEC refrigeration sheet can quickly dissipate heat when performing cooling work, so as to reduce the temperature of the first space 11, thereby reducing the influence of the external high temperature environment on the second space 21 where the detector assembly 6 is arranged.

[0074] In this embodiment, the heat sink adopts a copper heat sink; copper is a metal material with high thermal conductivity, so the copper heat sink can quickly transfer heat to other parts of the heat sink, thereby effectively reducing the temperature of the equipment; at the same time, copper has good corrosion resistance and is not easy to rust or be affected by oxidation corrosion, thereby ensuring the long-term stability of the heat sink; and copper has good plasticity and processing properties, and can be processed into various complex shapes and structures, thereby meeting the needs of different equipment for heat sinks; copper is also a recyclable metal material, and the use of copper heat sinks is beneficial to environmental protection and sustainable development.

[0075] In this embodiment, the second radiator 34 adopts a wind tunnel radiator, and the second fan 36 is arranged at the heat dissipation outlet of the wind tunnel radiator; the wind tunnel radiator can significantly improve the heat dissipation efficiency and reduce the equipment temperature by optimizing the air flow path, increasing the heat dissipation area and air flow rate, thereby improving the cooling effect of the first temperature control module 3.

[0076] In the utility model, the first fan 35 can not only be used to quickly discharge the hot gas in the first space 11 when the TEC refrigeration plate is cooling; but also when the first fan 35 rotates, the gas in the first space 11 can flow, so that the temperature in each place in the first space 11 is more uniform, thereby reducing the possibility of the second space 21 being affected by the external high temperature environment.

[0077] In this embodiment, the temperature control element 9 of the second temperature control module 4 is a heating plate.

[0078] In this embodiment, the box body 1 and the shell body 22 are both provided with an air inlet and an air outlet, the air inlet and the air outlet of the box body 1 are respectively provided with a first air inlet connector 15 and a first air outlet connector 16, and the air inlet and the air outlet of the shell body 22 are respectively provided with a second air inlet connector 25 and a second air outlet connector 26; the first air inlet connector 15 is connected to the second air inlet connector 25 through a pipeline, and the first air outlet connector 16 is connected to the second air outlet connector 26 through a pipeline; the two ends of the air chamber tube 7 are respectively an air inlet end 71 and an air outlet end 72, the air inlet end 71 cooperates with and communicates with the second air inlet connector 25, and the air outlet end 72 cooperates with and communicates with the second air outlet connector 26; the light source component 5 is arranged at one end of the air chamber tube 7 close to the air inlet end 71, and the detector component 6 is arranged at one end of the air chamber tube 7 close to the air outlet end 72; the box body 1 is provided with a first connector 17, a second connector 27 is provided on the shell 22; the light source assembly 5, the detector assembly 6, the second temperature control module 4, the second connector 27, the first temperature control module 3 and the temperature measuring module 8 realize data transmission with the outside through the cooperation of the first connector 17, the second connector 27 and the wiring harness; the gas to be detected is sent into the second space 21 through the setting of the first air inlet connector 15, the first air outlet connector 16, the second air inlet connector 25 and the second air outlet connector 26, and then the gas that has completed the detection is discharged; wherein, the light source assembly 5 is arranged at one end of the air chamber tube 7 close to the air inlet end 71, and the detector assembly 6 is arranged at one end of the air chamber tube 7 close to the air outlet end 72, so that the detector assembly 6 can quickly discharge the gas after completing the detection, so that the detection efficiency of the utility model is higher.

[0079] In this embodiment, a mounting base plate 28 is provided in the second space 21; the light source assembly 5, the detector assembly 6 and the air chamber tube 7 are all arranged on the mounting base plate 28, and the light source assembly 5 and the detector assembly 6 are arranged at different ends of the mounting base plate 28; the air chamber tube 7 is cylindrical, and a through hole is provided in the air chamber tube 7 to penetrate both ends thereof, and an air chamber 73 is formed by the through hole; an air inlet hole 74 is provided at the air inlet end 71, and an air outlet hole 75 is provided at the air outlet end 72, and the air inlet hole 74 and the air outlet hole 75 are respectively located at both ends of the air chamber 73; the light source assembly 5 includes a light source mounting plate 51, a light source 52 and a light source mounting seat 53; the light source mounting plate 51 is assembled on the mounting base plate 28; the light source 52 and the light source mounting seat 53 are both assembled on the light source mounting The light source mounting seat 53 is provided with a light source mounting space 531, and when the light source mounting seat 53 is mounted on the light source mounting plate 51, the light source 52 is located in the light source mounting space 531; the two ends of the light source mounting seat 53 are respectively provided with a first assembly opening 532 and a first mounting opening 533 which are communicated with the light source mounting space 531, and the light source 52 enters the light source mounting space 531 through the first assembly opening 532; a lens 100 is installed at the first mounting opening 533; the detector assembly 6 includes a detector mounting plate 61, a detector 62 and a detector mounting seat 63; the detector mounting plate 61 is mounted on the mounting base plate 28; the detector 62 The detector mounting seat 63 and the detector mounting seat 63 are both mounted on the detector mounting plate 61 and are located on the surface of the detector mounting plate 61 facing the light source assembly 5; a detector mounting space 631 is provided in the detector mounting seat 63, and when the detector mounting seat 63 is mounted on the detector mounting plate 61, the detector 62 is located in the detector mounting space 631; the two ends of the detector mounting seat 63 are respectively provided with a second assembly opening 632 and a second assembly opening 633 which are communicated with the detector mounting space 631, and the detector 62 enters the detector mounting space 631 through the second assembly opening 632; a lens 100 is installed at the second installation opening 633; ​​the gas analysis device 2 also includes a first sealing mounting sleeve 201 and a second sealing mounting sleeve 202 , a sealed inner space 203 is provided in each of the first sealing installation sleeve 201 and the second sealing installation sleeve 202, and a first installation opening 204, a second installation opening 205 and a third installation opening 206 are provided on the first sealing installation sleeve 201 and the second sealing installation sleeve 202; the first sealing installation sleeve 201 is provided on the light source installation seat 53, and is located on the side of the light source installation seat 53 facing the detector assembly 6; one end of the first installation opening 533 provided on the light source installation seat 53 enters the inner space 203 of the first sealing installation sleeve 201 through the first installation opening 204 of the first sealing installation sleeve 201; the air inlet end 71 of the air chamber tube 7 enters the inner space 203 of the first sealing installation sleeve 201 through the second installation opening 205;The second air inlet connector 25 enters the inner space 203 of the first sealed mounting sleeve 201 through the third mounting opening 206; a sealing ring is provided at the place where the light source mounting seat 53, the air chamber tube 7 and the second air inlet connector 25 enter the inner space 203; the second sealed mounting sleeve 202 is provided on the detector mounting seat 63, and is located on the side of the detector mounting seat 63 facing the light source assembly 5; one end of the detector mounting seat 63 provided with a second mounting opening 633 enters the inner space 203 of the second sealed mounting sleeve 202 through the first mounting opening 204 of the second sealed mounting sleeve 202; the air outlet end 72 of the air chamber tube 7 enters the inner space 203 of the second sealed mounting sleeve 202 through the second mounting opening 205; the second air outlet connector 26 enters the inner space 203 of the second sealed mounting sleeve 202 through the third mounting opening 206; at the detector mounting seat 63, the air chamber tube 7 and the second air outlet connector A sealing ring is provided at the place where the first sealing installation sleeve 201 and the second sealing installation sleeve 202 enter the inner space 203; the sealing ring is provided to improve the sealing effect of the first sealing installation sleeve 201 and the second sealing installation sleeve 202; the light source 52, the air inlet hole 74, the air chamber 73, the air outlet hole 75 and the detector 62 are in the same straight line; the gas to be detected flows from the first air inlet joint 15 to the second air inlet joint 25, and then enters the inner space 203 of the first sealing installation sleeve 201 from the second air inlet joint 25, and then enters the air chamber tube 7 of the air chamber tube 7 from the inner space 203 of the first sealing installation sleeve 201 through the air inlet hole 74; the gas to be detected in the air chamber tube 7 leaves the air chamber 73 through the air outlet hole 75, enters the inner space 203 of the second sealing installation sleeve 202, and is detected by the detector 62 in the process; the gas after detection flows to the first air outlet joint 16 through the second air outlet joint 26, and finally flows out of the device. ;

[0080] Generally, the first sealing installation sleeve 201 and the second sealing installation sleeve 202 are made of rubber parts. After assembly, the first sealing installation sleeve 201 and the second sealing installation sleeve 202 wrap the light source mounting seat 53, the air chamber tube 7, the second air inlet connector 25, the detector mounting seat 63, the air chamber tube 7 and the second air outlet connector 26 entering the inner space 203; try to avoid the gas to be detected from being exposed from the first sealing installation sleeve 201 and the second sealing installation sleeve 202 to affect the accuracy of the detection.

[0081] like Figure 12-29As shown, the utility model is provided with a temperature control system; the temperature control system includes an integrated circuit board, a power supply module, a power management module, a voltage reference module and a flow detection module; the power supply module is connected to the integrated circuit board and supplies power to the integrated circuit board; the integrated circuit board is connected to the power management module, the voltage reference module, the first temperature control module, the second temperature control module, the flow detection module and the temperature measurement module, the integrated circuit board supplies power to the power management module, the voltage reference module, the first temperature control module, the second temperature control module and the flow detection module, and the integrated circuit board controls the first temperature control module, the second temperature control module, the flow detection module and the temperature measurement module; the power management module is connected to the flow detection module and the first A temperature control module is connected, and outputs an adjusted voltage to the flow detection module and the first temperature control module to meet different voltage requirements; the voltage reference module is connected to the flow detection module and the temperature measurement module, and provides a stable reference voltage to both of them; the first temperature control module includes a TEC refrigeration plate, and the first temperature control module adopts a TEC full-bridge drive circuit; the first temperature control module realizes heating or cooling of the TEC refrigeration plate by controlling the forward and reverse current of the TEC refrigeration plate; the second temperature control module includes a heating plate, and controls the heating plate to heat; the circuit is detected by the temperature measurement module, and the temperature value is obtained; the temperature of the first temperature control module and the second temperature control module is controlled by the obtained temperature value.

[0082] In the utility model, the integrated circuit board is connected to the flow detection module and the temperature measurement module, so that the utility model can assist the detector component in detecting gas data through the data of the gas flow detected by the flow detection module; and the gas flow detected by the flow detection module can assist the first temperature control module and the second temperature control module in heating and cooling.

[0083] In the utility model, the power supply module is connected to the No. 1 terminal of the integrated circuit board P12, the No. 5 terminal of the integrated circuit board P12 and the No. 9 terminal of the integrated circuit board P12, thereby supplying power to the integrated circuit board; the power supply module provides +24V power supply to the No. 1 terminal of the integrated circuit board P12, the power supply module provides +5V power supply to the No. 5 terminal of the integrated circuit board P12, and the power supply module provides +3.3V power supply to the No. 9 terminal of the integrated circuit board P12; the No. 2 terminal of the integrated circuit board P12 is connected to the power management module, the flow detection module, the first temperature control module and the second temperature control module; the No. 6 terminal of the integrated circuit board P12 is connected to the voltage reference module; the No. 10 terminal of the integrated circuit board P12 is connected to the second temperature control module; the No. 3 terminal, the No. 4 terminal, the No. 7 terminal, the No. 8 terminal, the No. 11 terminal and the No. 12 terminal of the integrated circuit board P12 are grounded, the No. 7 terminal and the No. 8 terminal of the integrated circuit board P12 are AGND, and the No. 11 terminal of the integrated circuit board P12 is connected to the ground. The No. 13 terminal and the No. 12 terminal of the integrated circuit board P12 are DGND; the No. 13 terminal of the integrated circuit board P12 is connected to the first temperature control module; the No. 14 terminal of the integrated circuit board P12 is connected to the second temperature control module; the No. 15 terminal of the integrated circuit board P12 is connected to the flow detection module; the No. 16 terminal of the integrated circuit board P12 is connected to the first temperature control module; the No. 17 terminal of the integrated circuit board P12 is connected to the flow detection module; the No. 18 terminal of the integrated circuit board P12 is connected to the flow detection module; the No. 19 terminal of the integrated circuit board P12 is connected to the flow detection module; the No. 20 terminal of the integrated circuit board P12 is connected to the flow detection module; the No. 22 terminal of the integrated circuit board P12 is connected to the temperature measurement module; the No. 23 terminal of the integrated circuit board P12 is connected to the temperature measurement module; the No. 24 terminal of the integrated circuit board P12 is connected to the temperature measurement module; the No. 25 terminal of the integrated circuit board P12 is connected to the temperature measurement module; the No. 26 terminal of the integrated circuit board P12 is connected to the temperature measurement module;

[0084] The power management module includes a voltage stabilizing chip IC44, a capacitor C99, a capacitor C100, a resistor R203, a resistor R204, a resistor R205 and a polarized capacitor C101;

[0085] End 1 of the voltage stabilizing chip IC44 is connected to one end of the resistor R203 and one end of the resistor R204, and the other end of the resistor R204 is connected to one end of the resistor R205; the other end of the resistor R205 is connected to one end of the capacitor C100 and is grounded; End 2 of the voltage stabilizing chip IC44 is connected to end 4 of the voltage stabilizing chip IC44, the other end of the resistor R203 and the other end of the capacitor C100, and is connected to the flow detection module and the first temperature control module; End 3 of the voltage stabilizing chip IC44 is connected to one end of the capacitor C99 and the positive electrode of the polar capacitor C101, and is connected to end 2 of the integrated circuit board P12; the other end of the capacitor C99 is connected to the negative electrode of the polar capacitor C101 and is grounded;

[0086] The voltage reference module includes a voltage reference chip IC15, a capacitor C41, a capacitor C42, a capacitor C43, a capacitor C44, a capacitor C45, a resistor R69, an inductor FB1 and a voltage stabilizing diode TVS6;

[0087] Terminal 1 of the voltage reference chip IC15 is connected to one end of the inductor FB1, one end of the capacitor C43 and one end of the capacitor C44, and is connected to the flow detection module and the temperature measurement module; the other end of the inductor FB1 is connected to one end of the capacitor C41 and one end of the capacitor C42, and is connected to terminal 6 of the integrated circuit board P12; the other end of the capacitor C41 is connected to the other end of the capacitor C42 and one end of the resistor R69, and is grounded; terminal 2 of the voltage reference chip IC15 is connected to one end of the capacitor C45 and one end of the voltage zener diode TVS6, and is connected to the temperature measurement module; terminal 3 of the voltage reference chip IC15 is connected to the other end of the capacitor C45, the other end of the voltage zener diode TVS6, the other end of the capacitor C43, the other end of the capacitor C44 and the other end of the resistor R69, and is connected to AGND of the integrated circuit board P12.

[0088] In the utility model, the flow detection module includes a flow controller J11, a connector P4, a sensor P9, a sensor P11, a capacitor C17, a capacitor C20, a capacitor C23, a polar capacitor C30, a capacitor C33, a polar capacitor C34, a capacitor C36, a capacitor C47, a resistor R26, a resistor R27, a resistor R30, a resistor R42, a resistor R49, a resistor R50, a resistor R51, a resistor R57, a resistor R58, a resistor R59, a resistor R66, a resistor R70, a resistor R71, a resistor R75, a resistor R78, a resistor R80, a resistor R83, a resistor R84, a resistor R113, a resistor R129, a transistor Q2, a field effect transistor Q3, a transistor Q4, a transistor Q5, an operational amplifier IC8, a PWM signal to analog signal converter IC10, an operational amplifier IC13, a voltage regulator diode TVS18, a voltage regulator diode Z3 and a voltage regulator diode Z8;

[0089] Terminal 1 of connector P4 is connected to one end of capacitor C17 and grounded; terminal 2 of connector P4 is connected to the other end of capacitor C17 and one end of resistor R129, and the other end of resistor R129 is connected to terminal 2 of voltage regulator chip IC44, terminal 4 of voltage regulator chip IC44, resistor R203 and capacitor C100; terminal 3 of connector P4 is connected to one end of resistor R27;

[0090] Terminal 1 of operational amplifier IC8 is connected to terminal 4 of operational amplifier IC8 and one end of resistor R26, the other end of resistor R26 is connected to one end of capacitor C20 and terminal 15 of integrated circuit board P12, and the other end of capacitor C20 is connected to AGND of integrated circuit board P12; terminal 2 of operational amplifier IC8 is connected to AGND of integrated circuit board P12; terminal 3 of operational amplifier IC8 is connected to the other end of resistor R27, one end of resistor R30 and one end of voltage zener diode Z8; the other end of resistor R30 is connected to the other end of voltage zener diode Z8 and to AGND of integrated circuit board P12; terminal 5 of operational amplifier IC8 is connected to terminal 1 of voltage reference chip IC15, inductor FB1, capacitor C43 and capacitor C44;

[0091] Terminal 3 of the PWM signal to analog signal converter IC10 is connected to one end of the resistor R51 and to terminal 19 of the integrated circuit board P12; the other end of the resistor R51 is connected to the AGND of the integrated circuit board P12; terminal 4 of the PWM signal to analog signal converter IC10 is connected to terminal 2 of the integrated circuit board P12; terminal 5 of the PWM signal to analog signal converter IC10 is connected to the AGND of the integrated circuit board P12; terminal 6 of the PWM signal to analog signal converter IC10 is connected to terminal 4 of the operational amplifier IC13 and capacitor C36 The PWM signal to analog signal converter IC10 is connected to one end of the resistor R59; the 7th terminal of the PWM signal to analog signal converter IC10 is connected to the positive electrode of the polarized capacitor C30, one end of the resistor R42, and the 1st terminal of the transistor Q2; the negative electrode of the polarized capacitor C30 is connected to the other end of the resistor R42, and is connected to the AGND of the integrated circuit board P12; the 8th terminal of the PWM signal to analog signal converter IC10 is connected to one end of the capacitor C23; the other end of the capacitor C23 is connected to the AGND of the integrated circuit board P12; the 1st terminal of the operational amplifier IC13 is connected to one end of the resistor R49 and the resistor One end of R50 is connected, and the other end of resistor R49 is connected to AGND of integrated circuit board P12; terminal 2 of operational amplifier IC13 is connected to AGND of integrated circuit board P12; terminal 3 of operational amplifier IC13 is connected to one end of resistor R58, the other end of resistor R59 and the other end of capacitor C36; terminal 5 of operational amplifier IC13 is connected to one end of capacitor C33 and to terminal 2 of integrated circuit board P12; the other end of capacitor C33 is connected to AGND of integrated circuit board P12; terminal 1 of sensor P9 is connected to resistor R11 3 is connected, and is connected to the 8th terminal of the flow controller J11; the other end of the resistor R113 is connected to one end of the voltage zener diode TVS18, the positive electrode of the polarized capacitor C34, one end of the resistor R57 and the other end of the resistor R58; the 2nd terminal of the sensor P9 is connected to the other end of the voltage zener diode TVS18 and the negative electrode of the polarized capacitor C34, and is connected to the AGND of the integrated circuit board P12; the 2nd terminal of the transistor Q2 is connected to the 2nd terminal of the integrated circuit board P12; the 3rd terminal of the transistor Q2 is connected to the other end of the resistor R50 and the other end of the resistor R57;

[0092] Terminal 1 of the sensor P11 is connected to one end of the resistor R66 and one end of the resistor R70, and is connected to terminal 2 of the flow controller J11; terminal 2 of the sensor P11 is connected to the other end of the resistor R70, one end of the capacitor C47 and one end of the voltage-stabilizing diode Z3, and is connected to AGND of the integrated circuit board P12; the other end of the resistor R66 is connected to the other end of the capacitor C47 and the other end of the voltage-stabilizing diode Z3, and is connected to terminal 20 of the integrated circuit board P12;

[0093] Terminal 1 of transistor Q4 is connected to one end of resistor R75 and one end of resistor R78, and the other end of resistor R75 is connected to terminal 17 of integrated circuit board P12; terminal 2 of transistor Q4 is connected to terminal G of field effect transistor Q3 and one end of resistor R71; terminal 3 of transistor Q4 is connected to the other end of resistor R78 and grounded;

[0094] The S end of the field effect transistor Q3 is connected to the other end of the resistor R71 and to the No. 2 end of the integrated circuit board P12; the D end of the field effect transistor Q3 is connected to one end of the resistor R80;

[0095] Terminal 1 of transistor Q5 is connected to one end of resistor R83 and one end of resistor R84, and the other end of resistor R83 is connected to terminal 18 of integrated circuit board P12; terminal 2 of transistor Q5 is connected to the other end of resistor R80 and terminal 4 of flow controller J11; terminal 3 of transistor Q5 is connected to the other end of resistor R84 and grounded;

[0096] Terminal 1 of the flow controller J11 is connected to AGND of the integrated circuit board P12; terminal 5 of the flow controller J11 is connected to terminal 2 of the integrated circuit board P12; terminal 9 of the flow controller J11 is grounded; terminal 10 of the flow controller J11 is connected to AGND of the integrated circuit board P12; terminal 14 of the flow controller J11 is grounded.

[0097] In the utility model, the first temperature control module includes a driving chip IC42, a driving chip IC43, a cooling plate P2, a capacitor C1, a polar capacitor C91, a capacitor C92, a capacitor C93, a capacitor C94, a polar capacitor C96, a capacitor C97, a capacitor C98, a resistor R114, a resistor R188, a resistor R189, a resistor R190, a resistor R191, a resistor R192, a resistor R193, a resistor R194, a resistor R195, a resistor R196, a resistor R198, a resistor R199, a resistor R200, a resistor R201, a resistor R202, a resistor R206, a resistor R207, a resistor R208, a resistor R209, Resistor R210, resistor R211, resistor R212, resistor R213, resistor R214, resistor R215, resistor R216, resistor R217, Schottky diode D25, diode D26, Schottky diode D27, Schottky diode D28, diode D29, Schottky diode D30, diode D31, Schottky diode D32, Schottky diode D33, diode D34, field effect transistor Q23, field effect transistor Q24, field effect transistor Q25, field effect transistor Q26, transistor Q27, transistor Q28, transistor Q29, transistor Q30, light emitting diode LED6 and light emitting diode LED7;

[0098] Terminal 1 of the driving chip IC42 is connected to one end of the capacitor C1 and one end of the resistor R114, and is connected to terminal 2 of the voltage stabilizing chip IC44, terminal 4 of the voltage stabilizing chip IC44, resistor R203 and capacitor C100; terminal 2 of the driving chip IC42 is connected to terminal 2 of the transistor Q27 and one end of the resistor R188; terminal 3 of the driving chip IC42 is connected to terminal 2 of the transistor Q28 and one end of the resistor R196; terminal 4 of the driving chip IC42 is connected to the other end of the capacitor C1 and is grounded; terminal 5 of the driving chip IC42 is connected to one end of the resistor R192 and one end of the resistor R194; the driving chip IC4 The 6th terminal of 2 is connected to the negative electrode of the polarized capacitor C91, one end of the resistor R190, one end of the capacitor C92, the S terminal of the field effect transistor Q23, the D terminal of the field effect transistor Q24, one end of the Schottky diode D27, one end of the Schottky diode D28, one end of the light emitting diode LED7, one end of the resistor R216 and the 2nd terminal of the cooling plate P2; the 7th terminal of the driving chip IC42 is connected to one end of the resistor R189 and one end of the resistor R191; the 8th terminal of the driving chip IC42 is connected to one end of the Schottky diode D25 and the positive electrode of the polarized capacitor C91; the other end of the Schottky diode D25 is connected to the other end of the resistor R114;

[0099] The G end of the field effect transistor Q23 is connected to the other end of the capacitor C92, the other end of the resistor R190, the other end of the resistor R191 and one end of the diode D26, and the other end of the diode D26 is connected to the other end of the resistor R189; the D end of the field effect transistor Q23 is connected to the other end of the Schottky diode D27 and connected to the No. 2 end of the integrated circuit board P12;

[0100] The G end of the field effect transistor Q24 is connected to one end of the capacitor C93, one end of the resistor R193, one end of the diode D29 and the other end of the resistor R192, and the other end of the diode D29 is connected to the other end of the resistor R194; the S end of the field effect transistor Q24 is connected to the other end of the capacitor C93, the other end of the resistor R193 and the other end of the Schottky diode D28, and is grounded;

[0101] Terminal 1 of the driving chip IC43 is connected to one end of the capacitor C94 and one end of the resistor R195, and is connected to terminal 2 of the voltage stabilizing chip IC44, terminal 4 of the voltage stabilizing chip IC44, resistor R203 and capacitor C100; terminal 2 of the driving chip IC43 is connected to terminal 2 of the transistor Q29 and one end of the resistor R210; terminal 3 of the driving chip IC43 is connected to terminal 2 of the transistor Q30 and one end of the resistor R211; terminal 4 of the driving chip IC43 is connected to the other end of the capacitor C94 and is grounded; terminal 5 of the driving chip IC43 is connected to one end of the resistor R200 and one end of the resistor R202; the driving chip IC Terminal 6 of 43 is connected to the negative electrode of the polarized capacitor C96, one end of the resistor R198, one end of the capacitor C97, the S end of the field effect transistor Q25, the D end of the field effect transistor Q26, one end of the Schottky diode D32, one end of the Schottky diode D33, one end of the light emitting diode LED6, one end of the resistor R217 and the terminal 1 of the cooling plate P2; terminal 7 of the driving chip IC43 is connected to one end of the resistor R197 and one end of the resistor R199; terminal 8 of the driving chip IC43 is connected to one end of the Schottky diode D30 and the positive electrode of the polarized capacitor C96; the other end of the Schottky diode D30 is connected to the other end of the resistor R195;

[0102] The G end of the field effect transistor Q25 is connected to the other end of the capacitor C97, the other end of the resistor R198, the other end of the resistor R199 and one end of the diode D31, and the other end of the diode D31 is connected to the other end of the resistor R197; the D end of the field effect transistor Q25 is connected to the other end of the Schottky diode D32 and connected to the No. 2 end of the integrated circuit board P12;

[0103] The G end of the field effect transistor Q26 is connected to one end of the capacitor C98, one end of the resistor R201, one end of the diode D34 and the other end of the resistor R200, and the other end of the diode D34 is connected to the other end of the resistor R202; the S end of the field effect transistor Q26 is connected to the other end of the capacitor C98, the other end of the resistor R201 and the other end of the Schottky diode D33, and is grounded; the other end of the light emitting diode LED7 is connected to the other end of the resistor R217, and the other end of the resistor R216 is connected to the other end of the light emitting diode LED6;

[0104] Terminal 1 of transistor Q27 is connected to one end of resistor R206 and one end of resistor R208, and the other end of resistor R206 is connected to terminal 13 of integrated circuit board P12; the other end of resistor R188 is connected to terminal 2 of voltage regulator chip IC44, terminal 4 of voltage regulator chip IC44, resistor R203 and capacitor C100; terminal 3 of transistor Q27 is connected to the other end of resistor R208 and grounded;

[0105] Terminal 1 of transistor Q28 is connected to one end of resistor R207 and one end of resistor R209, and the other end of resistor R207 is connected to terminal 13 of integrated circuit board P12; the other end of resistor R196 is connected to terminal 2 of voltage regulator chip IC44, terminal 4 of voltage regulator chip IC44, resistor R203 and capacitor C100; terminal 3 of transistor Q28 is connected to the other end of resistor R209 and grounded;

[0106] Terminal 1 of transistor Q29 is connected to one end of resistor R212 and one end of resistor R214, and the other end of resistor R212 is connected to terminal 16 of integrated circuit board P12; the other end of resistor R210 is connected to terminal 2 of voltage regulator chip IC44, terminal 4 of voltage regulator chip IC44, resistor R203 and capacitor C100; terminal 3 of transistor Q29 is connected to the other end of resistor R214 and grounded;

[0107] Terminal 1 of transistor Q30 is connected to one end of resistor R213 and one end of resistor R215, and the other end of resistor R213 is connected to terminal 16 of integrated circuit board P12; the other end of resistor R211 is connected to terminal 2 of voltage regulator chip IC44, terminal 4 of voltage regulator chip IC44, resistor R203 and capacitor C100; terminal 3 of transistor Q30 is connected to the other end of resistor R215 and grounded.

[0108] In the present utility model, the second temperature control module includes a photocoupler IC2, a heating plate P1, a resistor R2, a resistor R3, a resistor R4, a resistor R9, a diode D2, a light emitting diode LED1 and a field effect tube Q1;

[0109] Terminal 1 of the photocoupler IC2 is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to terminal 10 of the integrated circuit board P12; terminal 2 of the photocoupler IC2 is connected to terminal 14 of the integrated circuit board P12; terminal 3 of the photocoupler IC2 is connected to one end of the resistor R3; terminal 4 of the photocoupler IC2 is connected to one end of the resistor R9 and terminal G of the field effect transistor Q1;

[0110] The D end of the field effect tube Q1 is connected to one end of the light emitting diode LED1, one end of the diode D2 and the No. 1 end of the heating plate P1; the S end of the field effect tube Q1 is connected to the other end of the resistor R9 and is grounded;

[0111] End 2 of the heating plate P1 is connected to the other end of the diode D2, the other end of the resistor R3 and one end of the resistor R4, and is connected to end 2 of the integrated circuit board P12; the other end of the resistor R4 is connected to the other end of the light-emitting diode LED1.

[0112] In the utility model, the temperature measurement module includes a first temperature measurement circuit, a second temperature measurement circuit, a third temperature measurement circuit, a fourth temperature measurement circuit and a fifth temperature measurement circuit; through the setting of each temperature measurement circuit, the first temperature control module and the second temperature control module can perform heating and cooling more accurately, thereby improving the detection accuracy of the utility model.

[0113] The first temperature measurement circuit includes a thermistor P6, a capacitor C9, a capacitor C12, a capacitor C15, a capacitor C16, a capacitor C19, a resistor R17, a resistor R20, a resistor R21, a resistor R23, a resistor R25, a resistor R29, a resistor R34, a resistor R35, an operational amplifier IC7 and a voltage stabilizing diode Z9;

[0114] End 1 of thermistor P6 is connected to one end of resistor R20 and one end of resistor R29; End 2 of thermistor P6 is connected to one end of resistor R34, and connected to AGND of integrated circuit board P12; the other end of resistor R34 is connected to one end of resistor R21 and one end of resistor R25; the other end of resistor R21 is connected to the other end of resistor R20, one end of capacitor C16 and one end of capacitor C15, and connected to end 2 of voltage reference chip IC15, capacitor C45 and voltage regulator diode TVS6; the other end of capacitor C16 is connected to the other end of capacitor C15, and connected to AGND of integrated circuit board P12;

[0115] Terminal 1 of the operational amplifier IC7 is connected to terminal 5 of the operational amplifier IC7, one end of the resistor R17 and one end of the capacitor C9; terminal 2 of the operational amplifier IC7 is connected to the other end of the resistor R17, the other end of the capacitor C9 and the other end of the resistor R25; terminal 3 of the operational amplifier IC7 is connected to the other end of the resistor R29 and one end of the resistor R35, and the other end of the resistor R35 is connected to terminal 2 of the voltage reference chip IC15, capacitor C45 and the voltage regulator diode TVS6; terminal 4 of the operational amplifier IC7 is connected to AGND of the integrated circuit board P12; terminal 6 of the operational amplifier IC7 is connected to the resistor R2 3, one end of capacitor C19 and one end of voltage zener diode Z9 are connected, and connected to terminal 26 of integrated circuit board P12; the other end of capacitor C19 is connected to AGND of integrated circuit board P12; the other end of voltage zener diode Z9 is connected to AGND of integrated circuit board P12; terminal 7 of operational amplifier IC7 is connected to the other end of resistor R23; terminal 8 of operational amplifier IC7 is connected to one end of capacitor C12, and connected to terminal 1 of voltage reference chip IC15, inductor FB1, capacitor C43 and capacitor C44; the other end of capacitor C12 is connected to AGND of integrated circuit board P12;

[0116] The second temperature measurement circuit includes a thermistor P8, a capacitor C22, a capacitor C25, a capacitor C28, a capacitor C29, a capacitor C32, a resistor R37, a resistor R40, a resistor R41, a resistor R44, a resistor R46, a resistor R48, a resistor R55, a resistor R56, an operational amplifier IC11 and a voltage stabilizing diode Z10;

[0117] End 1 of thermistor P8 is connected to one end of resistor R40 and one end of resistor R48; End 2 of thermistor P8 is connected to one end of resistor R55, and is connected to AGND of integrated circuit board P12; the other end of resistor R55 is connected to one end of resistor R41 and one end of resistor R46; the other end of resistor R41 is connected to the other end of resistor R40, one end of capacitor C29 and one end of capacitor C28, and is connected to end 2 of voltage reference chip IC15, capacitor C45 and voltage regulator diode TVS6; the other end of capacitor C29 is connected to the other end of capacitor C28, and is connected to AGND of integrated circuit board P12;

[0118] Terminal 1 of the operational amplifier IC11 is connected to terminal 5 of the operational amplifier IC11, one end of the resistor R37 and one end of the capacitor C22; terminal 2 of the operational amplifier IC11 is connected to the other end of the resistor R37, the other end of the capacitor C22 and the other end of the resistor R46; terminal 3 of the operational amplifier IC11 is connected to the other end of the resistor R48 and one end of the resistor R56, and the other end of the resistor R56 is connected to terminal 2 of the voltage reference chip IC15, capacitor C45 and voltage regulator diode TVS6; terminal 4 of the operational amplifier IC11 is connected to AGND of the integrated circuit board P12; terminal 6 of the operational amplifier IC11 is connected to the resistor One end of R44, one end of capacitor C32 and one end of Zener diode Z10 are connected, and connected to terminal 25 of integrated circuit board P12; the other end of capacitor C32 is connected to AGND of integrated circuit board P12; the other end of Zener diode Z10 is connected to AGND of integrated circuit board P12; terminal 7 of operational amplifier IC11 is connected to the other end of resistor R44; terminal 8 of operational amplifier IC11 is connected to one end of capacitor C25, and connected to terminal 1 of voltage reference chip IC15, inductor FB1, capacitor C43 and capacitor C44; the other end of capacitor C25 is connected to AGND of integrated circuit board P12;

[0119] The third temperature measurement circuit includes a thermistor P10, a capacitor C35, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C46, ​​a resistor R60, a resistor R61, a resistor R62, a resistor R63, a resistor R64, a resistor R65, a resistor R67, a resistor R68, an operational amplifier IC14 and a voltage stabilizing diode Z11;

[0120] End 1 of thermistor P10 is connected to one end of resistor R61 and one end of resistor R65; End 2 of thermistor P10 is connected to one end of resistor R67, and connected to AGND of integrated circuit board P12; the other end of resistor R67 is connected to one end of resistor R62 and one end of resistor R64; the other end of resistor R62 is connected to the other end of resistor R61, one end of capacitor C39 and one end of capacitor C38, and connected to end 2 of voltage reference chip IC15, capacitor C45 and voltage regulator diode TVS6; the other end of capacitor C39 is connected to the other end of capacitor C38, and connected to AGND of integrated circuit board P12;

[0121] Terminal 1 of the operational amplifier IC14 is connected to terminal 5 of the operational amplifier IC14, one end of the resistor R60 and one end of the capacitor C35; terminal 2 of the operational amplifier IC14 is connected to the other end of the resistor R60, the other end of the capacitor C35 and the other end of the resistor R64; terminal 3 of the operational amplifier IC14 is connected to the other end of the resistor R65 and one end of the resistor R68, and the other end of the resistor R68 is connected to terminal 2 of the voltage reference chip IC15, capacitor C45 and voltage regulator diode TVS6; terminal 4 of the operational amplifier IC14 is connected to AGND of the integrated circuit board P12; terminal 6 of the operational amplifier IC14 is connected to resistor One end of R63, one end of capacitor C46 and one end of Zener diode Z11 are connected, and connected to terminal 24 of integrated circuit board P12; the other end of capacitor C46 is connected to AGND of integrated circuit board P12; the other end of Zener diode Z11 is connected to AGND of integrated circuit board P12; terminal 7 of operational amplifier IC14 is connected to the other end of resistor R63; terminal 8 of operational amplifier IC14 is connected to one end of capacitor C37, and connected to terminal 1 of voltage reference chip IC15, inductor FB1, capacitor C43 and capacitor C44; the other end of capacitor C37 is connected to AGND of integrated circuit board P12;

[0122] The fourth temperature measurement circuit includes a thermistor P13, a capacitor C48, a capacitor C49, a capacitor C50, a capacitor C51, a capacitor C52, a resistor R72, a resistor R73, a resistor R74, a resistor R76, a resistor R77, a resistor R79, a resistor R81, a resistor R82, an operational amplifier IC17 and a voltage stabilizing diode Z13;

[0123] End 1 of thermistor P13 is connected to one end of resistor R73 and one end of resistor R79; End 2 of thermistor P13 is connected to one end of resistor R81, and is connected to AGND of integrated circuit board P12; the other end of resistor R81 is connected to one end of resistor R74 and one end of resistor R77; the other end of resistor R74 is connected to the other end of resistor R73, one end of capacitor C51 and one end of capacitor C50, and is connected to end 2 of voltage reference chip IC15, capacitor C45 and voltage regulator diode TVS6; the other end of capacitor C51 is connected to the other end of capacitor C50, and is connected to AGND of integrated circuit board P12;

[0124] Terminal 1 of the operational amplifier IC17 is connected to terminal 5 of the operational amplifier IC17, one end of the resistor R72 and one end of the capacitor C48; terminal 2 of the operational amplifier IC17 is connected to the other end of the resistor R72, the other end of the capacitor C48 and the other end of the resistor R77; terminal 3 of the operational amplifier IC17 is connected to the other end of the resistor R79 and one end of the resistor R82, and the other end of the resistor R82 is connected to terminal 2 of the voltage reference chip IC15, capacitor C45 and voltage regulator diode TVS6; terminal 4 of the operational amplifier IC17 is connected to AGND of the integrated circuit board P12; terminal 6 of the operational amplifier IC17 is connected to resistor One end of R76, one end of capacitor C52 and one end of Zener diode Z13 are connected, and connected to terminal 23 of integrated circuit board P12; the other end of capacitor C52 is connected to AGND of integrated circuit board P12; the other end of Zener diode Z13 is connected to AGND of integrated circuit board P12; terminal 7 of operational amplifier IC17 is connected to the other end of resistor R76; terminal 8 of operational amplifier IC17 is connected to one end of capacitor C49, and connected to terminal 1 of voltage reference chip IC15, inductor FB1, capacitor C43 and capacitor C44; the other end of capacitor C49 is connected to AGND of integrated circuit board P12;

[0125] The fifth temperature measurement circuit includes a resistance temperature detector P7, a capacitor C21, a capacitor C26, a capacitor C27, a capacitor C31, a capacitor C52, a resistor R36, a resistor R38, a resistor R39, a resistor R43, a resistor R45, a resistor R47, a resistor R53, a resistor R54, an operational amplifier IC41 and a voltage stabilizing diode Z12;

[0126] Terminal 1 of the resistance temperature detector P7 is connected to one end of the resistor R38 and one end of the resistor R47; Terminal 2 of the resistance temperature detector P7 is connected to one end of the resistor R53; Terminal 3 of the resistance temperature detector P7 is connected to AGND of the integrated circuit board P12; The other end of the resistor R53 is connected to one end of the resistor R39 and one end of the resistor R45; The other end of the resistor R39 is connected to the other end of the resistor R38, one end of the capacitor C27 and one end of the capacitor C26, and is connected to terminal 2 of the voltage reference chip IC15, the capacitor C45 and the voltage regulator diode TVS6; The other end of the capacitor C27 is connected to the other end of the capacitor C26, and is connected to AGND of the integrated circuit board P12;

[0127] Terminal 1 of the operational amplifier IC41 is connected to one end of the resistor R43, one end of the resistor R36 and one end of the capacitor C21; terminal 2 of the operational amplifier IC41 is connected to the AGND of the integrated circuit board P12; terminal 3 of the operational amplifier IC41 is connected to the other end of the resistor R47 and one end of the resistor R54, and the other end of the resistor R54 is connected to the AGND of the integrated circuit board P12; terminal 4 of the operational amplifier IC41 is connected to the other end of the capacitor C21, the other end of the resistor R36 and the other end of the resistor R45; terminal 5 of the operational amplifier IC41 is connected to terminal 1 of the voltage reference chip IC15, the inductor FB1, the capacitor C43 and the capacitor C44; the other end of the resistor R43 is connected to one end of the capacitor C31 and one end of the Zener diode Z12, and is connected to terminal 22 of the integrated circuit board P12; the other end of the capacitor C31 is connected to the AGND of the integrated circuit board P12, and the other end of the Zener diode Z12 is connected to the AGND of the integrated circuit board P12.

[0128] In this embodiment, sensor P9 is arranged in the second air inlet connector and sensor P11 is arranged in the second air outlet connector, so that the utility model can assist the detector component in detecting gas data through the data of the gas flow detected by the flow detection module; and the gas flow detected by the flow detection module can assist the first temperature control module and the second temperature control module in heating and cooling.

[0129] like Fig.30 , 31 As shown, in the present invention, the core process of temperature control is the PID control module. The current temperature value collected is compared with the target temperature, and the corresponding output is calculated by the PID control module algorithm; the specific formula is as follows:

[0130] OUT=Kp*Ek+Ki*SEk+Kd*(Ek-Ek_1)

[0131] Among them, Ek is the error between the current value and the target value; Ek_1 is the error value between the previous current value and the target value; SEk is the accumulated error; Kp is the proportional coefficient, Ki is the integral coefficient, and Kd is the differential coefficient.

[0132] According to the specific situation, by selecting appropriate Kp, Ki, Kd coefficient values, the value of the output y can be calculated.

[0133] The stability and accuracy of PID control depends on whether the Kp, Ki, and Kd coefficients are appropriate. Under different ambient temperatures, the heat exchange and heat conduction between the temperature control device and the environment are different, resulting in a decrease in the stability and accuracy of temperature control. Therefore, the ambient temperature is introduced into the control algorithm to automatically adjust the PID coefficient according to the ambient temperature, thereby ensuring the temperature control performance under different ambient temperatures. The specific steps are as follows:

[0134] S1 The applicable ambient temperature range of this temperature control device is 5℃ to 40℃, so the Kp, Ki and Kd coefficients of the temperature control device are adjusted at ambient temperatures of 5℃, 10℃, 15℃, 20℃, 25℃, 30℃, 35℃ and 40℃ respectively to obtain the corresponding coefficient list.

[0135] S2 uses the ambient temperature value (BT) as the independent variable and Kp, Ki, and Kd as the dependent variables to perform linear fitting, thereby obtaining the corresponding k and b values ​​in the one-variable first-order equation (y=kx+b), and the three coefficient fitting formulas can be obtained:

[0136] Kp=k_Kp*BT+b_Kp;

[0137] Ki=k_Ki*BT+b_Ki;

[0138] Kd=k_Kd*BT+b_Kd;

[0139] S3 substitutes the above three formulas into the calculation formula of the PID control module to complete the compensation calculation. The specific formula is as follows:

[0140] OUT=Kp*Ek+Ki*SEk+Kd*(Ek-Ek_1)

[0141] =(k_Kp*BT+b_Kp)*Ek+(k_Ki*BT+b_Ki)*SEk+(k_Kd*BT+b_Kd)*(Ek-Ek_1)

[0142] The quantity obtained through calculation is a digital quantity, which cannot be directly input into the driving circuit of TEC to directly drive TEC to work. Here, the microcontroller is used to adjust the power-on duty cycle of TEC in the form of PWM signal, so as to achieve the purpose of temperature control.

[0143] It is worth noting that other technical solutions of the utility model belong to the prior art, so they are not described in detail. The above is only the preferred implementation of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and modifications without departing from the concept of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A greenhouse gas analyzer, characterized in that: It comprises a box body, in which a gas analysis device, a first temperature control module and a second temperature control module are arranged; The gas analysis device comprises a housing, a light source assembly, a detector assembly and a gas chamber tube, wherein the light source assembly comprises a light source mounting plate, a light source and a light source mounting seat; the gas chamber tube is provided with through holes penetrating both ends thereof, and a gas chamber is formed by the through holes; The first temperature control module and the second temperature control module both include temperature control elements with heating function; the temperature control element of the first temperature control module and / or the temperature control element of the second temperature control module also has a cooling function; and then the temperature of the first space and the second space are controlled respectively by the first temperature control module and the second temperature control module.

2. A greenhouse gas analyzer according to claim 1, characterized in that: The first temperature control module further includes a radiator, a heat sink and a fan; the heat sink includes a first heat sink and a second heat sink; the radiator includes a first heat sink and a second heat sink, the first heat sink is connected to the first heat sink, and the second heat sink is connected to the second heat sink; the fan includes a first fan and a second fan, the first fan is arranged on the first heat sink, and the second fan is arranged on the second heat sink; The first heat sink, the first radiator and the first fan are arranged in the box body; the second heat sink, the second radiator and the second fan are arranged outside the box body.

3. A greenhouse gas analyzer according to claim 1, characterized in that: The box body and the shell body are both provided with an air inlet and an air outlet, the air inlet and the air outlet of the box body are respectively provided with a first air inlet joint and a first air outlet joint, and the air inlet and the air outlet of the shell body are respectively provided with a second air inlet joint and a second air outlet joint; the first air inlet joint is connected to the second air inlet joint by a pipeline, and the first air outlet joint is connected to the second air outlet joint by a pipeline; the two ends of the air chamber tube are respectively an air inlet end and an air outlet end, the air inlet end cooperates with and communicates with the second air inlet joint, and the air outlet end cooperates with and communicates with the second air outlet joint; the light source assembly is arranged at one end of the air chamber tube close to the air inlet end, and the detector assembly is arranged at one end of the air chamber tube close to the air outlet end; A first connector is provided on the box body, and a second connector is provided on the shell body; the light source assembly, the detector assembly, the second temperature control module, the second connector, the first temperature control module and the temperature measurement module realize data transmission with the outside through the cooperation of the first connector, the second connector and the wiring harness.

4. A greenhouse gas analyzer according to claim 3, characterized in that: The light source mounting plate is mounted on the mounting bottom plate; the light source and the light source mounting seat are both mounted on the light source mounting plate and are located on the surface of the light source mounting plate facing the detector assembly; a light source mounting space is provided in the light source mounting seat, and when the light source mounting seat is mounted on the light source mounting plate, the light source is located in the light source mounting space; a first mounting opening and a first mounting opening communicating with the light source mounting space are respectively provided at both ends of the light source mounting seat, and the light source enters the light source mounting space through the first mounting opening; a lens is installed at the first mounting opening; The detector assembly comprises a detector mounting plate, a detector and a detector mounting seat; the detector mounting plate is mounted on the mounting bottom plate; the detector and the detector mounting seat are both mounted on the detector mounting plate and are located on the surface of the detector mounting plate facing the light source assembly; a detector mounting space is provided in the detector mounting seat, and when the detector mounting seat is mounted on the detector mounting plate, the detector is located in the detector mounting space; a second mounting opening and a second mounting opening communicating with the detector mounting space are respectively provided at both ends of the detector mounting seat, and the detector enters the detector mounting space through the second mounting opening; a lens is installed at the second mounting opening; The gas analysis device further comprises a first sealing installation sleeve and a second sealing installation sleeve, wherein a sealed inner space is provided in each of the first sealing installation sleeve and the second sealing installation sleeve, and a first installation opening, a second installation opening and a third installation opening are provided on the first sealing installation sleeve and the second sealing installation sleeve; The first sealing mounting sleeve is arranged on the light source mounting seat and is located on a side of the light source mounting seat facing the detector assembly; One end of the light source mounting seat provided with the first mounting opening enters the inner space of the first sealing mounting sleeve through the first mounting opening of the first sealing mounting sleeve; The air inlet end of the air chamber tube enters the inner space of the first sealing installation sleeve through the second installation opening; the second air inlet connector enters the inner space of the first sealing installation sleeve through the third installation opening; a sealing ring is provided at the place where the light source mounting seat, the air chamber tube and the second air inlet connector enter the inner space; The second sealing installation sleeve is arranged on the detector installation seat and is located on the side of the detector installation seat facing the light source assembly; one end of the detector installation seat provided with the second installation opening enters the inner space of the second sealing installation sleeve through the first installation opening of the second sealing installation sleeve; The air outlet end of the air chamber tube enters the inner space of the second sealing installation sleeve through the second installation opening; The second air outlet connector enters the inner space of the second sealing mounting sleeve through the third mounting opening; a sealing ring is arranged at the detector mounting seat, the air chamber tube and the second air outlet connector entering the inner space; The light source, air inlet, air chamber, air outlet and detector are in the same straight line; The gas to be detected flows from the first air inlet connector to the second air inlet connector, then enters the inner space of the first sealing installation sleeve from the second air inlet connector, and then enters the air chamber tube of the air chamber tube from the inner space of the first sealing installation sleeve through the air inlet hole; the gas to be detected in the air chamber tube leaves the air chamber through the air outlet hole, enters the inner space of the second sealing installation sleeve, and is detected by the detector in the process; the gas after detection flows to the first air outlet connector through the second air outlet connector, and finally flows out of the equipment.

5. A greenhouse gas analyzer according to claim 1, characterized in that: A temperature control system is provided; the temperature control system comprises an integrated circuit board, a power supply module, a power management module, a voltage reference module and a flow detection module; the power supply module is connected to the integrated circuit board and supplies power to the integrated circuit board; the integrated circuit board is connected to the power management module, the voltage reference module, the first temperature control module, the second temperature control module, the flow detection module and the temperature measurement module, the integrated circuit board supplies power to the power management module, the voltage reference module, the first temperature control module, the second temperature control module and the flow detection module, and the integrated circuit board controls the first temperature control module, the second temperature control module, the flow detection module and the temperature measurement module; the power management module is connected to the flow detection module and the first temperature control module, and outputs an adjusted voltage to the flow detection module and the first temperature control module to meet different voltage requirements; the voltage reference module is connected to the flow detection module and the temperature measurement module, and provides a stable reference voltage to both of them; The first temperature control module includes a TEC cooling plate, and the first temperature control module adopts a TEC full-bridge driving circuit; the first temperature control module realizes heating or cooling of the TEC cooling plate by controlling the forward and reverse current of the TEC cooling plate; The second temperature control module includes a heating plate, and controls the heating plate to heat; The circuit is detected by the temperature measuring module to obtain the temperature value; and the temperature of the first temperature control module and the second temperature control module are controlled by the obtained temperature value.

6. A greenhouse gas analyzer according to claim 5, characterized in that: The power supply module is connected to terminal 1, terminal 5 and terminal 9 of the integrated circuit board P12, thereby supplying power to the integrated circuit board; the power supply module provides +24V power supply to terminal 1 of the integrated circuit board P12, the power supply module provides +5V power supply to terminal 5 of the integrated circuit board P12, and the power supply module provides +3.3V power supply to terminal 9 of the integrated circuit board P12; terminal 2 of the integrated circuit board P12 is connected to the power management module, the flow detection module, the first temperature control module and the second temperature control module; terminal 6 of the integrated circuit board P12 is connected to the voltage reference module; terminal 10 of the integrated circuit board P12 is connected to the second temperature control module; terminal 3, terminal 4, terminal 7, terminal 8, terminal 11 and terminal 12 of the integrated circuit board P12 are grounded, terminal 7 and terminal 8 of the integrated circuit board P12 are AGND, terminal 11 and terminal 12 of the integrated circuit board P12 are grounded, terminal 12 Terminal 2 is DGND; Terminal 13 of integrated circuit board P12 is connected to the first temperature control module; Terminal 14 of integrated circuit board P12 is connected to the second temperature control module; Terminal 15 of integrated circuit board P12 is connected to the flow detection module; Terminal 16 of integrated circuit board P12 is connected to the first temperature control module; Terminal 17 of integrated circuit board P12 is connected to the flow detection module; Terminal 18 of integrated circuit board P12 is connected to the flow detection module; Terminal 19 of integrated circuit board P12 is connected to the flow detection module; Terminal 20 of integrated circuit board P12 is connected to the flow detection module; Terminal 22 of integrated circuit board P12 is connected to the temperature measurement module; Terminal 23 of integrated circuit board P12 is connected to the temperature measurement module; Terminal 24 of integrated circuit board P12 is connected to the temperature measurement module; Terminal 25 of integrated circuit board P12 is connected to the temperature measurement module; Terminal 26 of integrated circuit board P12 is connected to the temperature measurement module.

7. A greenhouse gas analyzer according to claim 6, characterized in that: The first temperature control module includes a driving chip IC42, a driving chip IC43, a cooling plate P2, a capacitor C1, a polarized capacitor C91, a capacitor C92, a capacitor C93, a capacitor C94, a polarized capacitor C96, a capacitor C97, a capacitor C98, a resistor R114, a resistor R188, a resistor R189, a resistor R190, a resistor R191, a resistor R192, a resistor R193, a resistor R194, a resistor R195, a resistor R196, a resistor R198, a resistor R199, a resistor R200, a resistor R201, a resistor R202, a resistor R206, a resistor R207, a resistor R208, a resistor R209, and a resistor R210.

10. resistor R211, resistor R212, resistor R213, resistor R214, resistor R215, resistor R216, resistor R217, Schottky diode D25, diode D26, Schottky diode D27, Schottky diode D28, diode D29, Schottky diode D30, diode D31, Schottky diode D32, Schottky diode D33, diode D34, field effect transistor Q23, field effect transistor Q24, field effect transistor Q25, field effect transistor Q26, transistor Q27, transistor Q28, transistor Q29, transistor Q30, light emitting diode LED6, and light emitting diode LED7; Terminal 1 of the driving chip IC42 is connected to one end of the capacitor C1 and one end of the resistor R114, and is connected to terminal 2 of the voltage stabilizing chip IC44, terminal 4 of the voltage stabilizing chip IC44, resistor R203 and capacitor C100; terminal 2 of the driving chip IC42 is connected to terminal 2 of the transistor Q27 and one end of the resistor R188; terminal 3 of the driving chip IC42 is connected to terminal 2 of the transistor Q28 and one end of the resistor R196; terminal 4 of the driving chip IC42 is connected to the other end of the capacitor C1 and is grounded; terminal 5 of the driving chip IC42 is connected to one end of the resistor R192 and one end of the resistor R194; the driving chip IC4 The 6th terminal of 2 is connected to the negative electrode of the polarized capacitor C91, one end of the resistor R190, one end of the capacitor C92, the S terminal of the field effect transistor Q23, the D terminal of the field effect transistor Q24, one end of the Schottky diode D27, one end of the Schottky diode D28, one end of the light emitting diode LED7, one end of the resistor R216 and the 2nd terminal of the cooling plate P2; the 7th terminal of the driving chip IC42 is connected to one end of the resistor R189 and one end of the resistor R191; the 8th terminal of the driving chip IC42 is connected to one end of the Schottky diode D25 and the positive electrode of the polarized capacitor C91; the other end of the Schottky diode D25 is connected to the other end of the resistor R114; The G end of the field effect transistor Q23 is connected to the other end of the capacitor C92, the other end of the resistor R190, the other end of the resistor R191 and one end of the diode D26, and the other end of the diode D26 is connected to the other end of the resistor R189; the D end of the field effect transistor Q23 is connected to the other end of the Schottky diode D27 and connected to the No. 2 end of the integrated circuit board P12; The G end of the field effect transistor Q24 is connected to one end of the capacitor C93, one end of the resistor R193, one end of the diode D29 and the other end of the resistor R192, and the other end of the diode D29 is connected to the other end of the resistor R194; the S end of the field effect transistor Q24 is connected to the other end of the capacitor C93, the other end of the resistor R193 and the other end of the Schottky diode D28, and is grounded; Terminal 1 of the driving chip IC43 is connected to one end of the capacitor C94 and one end of the resistor R195, and is connected to terminal 2 of the voltage stabilizing chip IC44, terminal 4 of the voltage stabilizing chip IC44, resistor R203 and capacitor C100; terminal 2 of the driving chip IC43 is connected to terminal 2 of the transistor Q29 and one end of the resistor R210; terminal 3 of the driving chip IC43 is connected to terminal 2 of the transistor Q30 and one end of the resistor R211; terminal 4 of the driving chip IC43 is connected to the other end of the capacitor C94 and is grounded; terminal 5 of the driving chip IC43 is connected to one end of the resistor R200 and one end of the resistor R202; the driving chip IC Terminal 6 of 43 is connected to the negative electrode of the polarized capacitor C96, one end of the resistor R198, one end of the capacitor C97, the S end of the field effect transistor Q25, the D end of the field effect transistor Q26, one end of the Schottky diode D32, one end of the Schottky diode D33, one end of the light emitting diode LED6, one end of the resistor R217 and the terminal 1 of the cooling plate P2; terminal 7 of the driving chip IC43 is connected to one end of the resistor R197 and one end of the resistor R199; terminal 8 of the driving chip IC43 is connected to one end of the Schottky diode D30 and the positive electrode of the polarized capacitor C96; the other end of the Schottky diode D30 is connected to the other end of the resistor R195; The G end of the field effect transistor Q25 is connected to the other end of the capacitor C97, the other end of the resistor R198, the other end of the resistor R199 and one end of the diode D31, and the other end of the diode D31 is connected to the other end of the resistor R197; the D end of the field effect transistor Q25 is connected to the other end of the Schottky diode D32 and connected to the No. 2 end of the integrated circuit board P12; The G end of the field effect transistor Q26 is connected to one end of the capacitor C98, one end of the resistor R201, one end of the diode D34 and the other end of the resistor R200, and the other end of the diode D34 is connected to the other end of the resistor R202; the S end of the field effect transistor Q26 is connected to the other end of the capacitor C98, the other end of the resistor R201 and the other end of the Schottky diode D33, and is grounded; the other end of the light emitting diode LED7 is connected to the other end of the resistor R217, and the other end of the resistor R216 is connected to the other end of the light emitting diode LED6; Terminal 1 of transistor Q27 is connected to one end of resistor R206 and one end of resistor R208, and the other end of resistor R206 is connected to terminal 13 of integrated circuit board P12; the other end of resistor R188 is connected to terminal 2 of voltage regulator chip IC44, terminal 4 of voltage regulator chip IC44, resistor R203 and capacitor C100; terminal 3 of transistor Q27 is connected to the other end of resistor R208 and grounded; Terminal 1 of transistor Q28 is connected to one end of resistor R207 and one end of resistor R209, and the other end of resistor R207 is connected to terminal 13 of integrated circuit board P12; the other end of resistor R196 is connected to terminal 2 of voltage regulator chip IC44, terminal 4 of voltage regulator chip IC44, resistor R203 and capacitor C100; terminal 3 of transistor Q28 is connected to the other end of resistor R209 and grounded; Terminal 1 of transistor Q29 is connected to one end of resistor R212 and one end of resistor R214, and the other end of resistor R212 is connected to terminal 16 of integrated circuit board P12; the other end of resistor R210 is connected to terminal 2 of voltage regulator chip IC44, terminal 4 of voltage regulator chip IC44, resistor R203 and capacitor C100; terminal 3 of transistor Q29 is connected to the other end of resistor R214 and grounded; Terminal 1 of transistor Q30 is connected to one end of resistor R213 and one end of resistor R215, and the other end of resistor R213 is connected to terminal 16 of integrated circuit board P12; the other end of resistor R211 is connected to terminal 2 of voltage regulator chip IC44, terminal 4 of voltage regulator chip IC44, resistor R203 and capacitor C100; terminal 3 of transistor Q30 is connected to the other end of resistor R215 and grounded.

8. A greenhouse gas analyzer according to claim 6, characterized in that: The second temperature control module includes a photocoupler IC2, a heating plate P1, a resistor R2, a resistor R3, a resistor R4, a resistor R9, a diode D2, a light emitting diode LED1 and a field effect tube Q1; Terminal 1 of the photocoupler IC2 is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to terminal 10 of the integrated circuit board P12; terminal 2 of the photocoupler IC2 is connected to terminal 14 of the integrated circuit board P12; terminal 3 of the photocoupler IC2 is connected to one end of the resistor R3; terminal 4 of the photocoupler IC2 is connected to one end of the resistor R9 and terminal G of the field effect transistor Q1; The D end of the field effect tube Q1 is connected to one end of the light emitting diode LED1, one end of the diode D2 and the No. 1 end of the heating plate P1; the S end of the field effect tube Q1 is connected to the other end of the resistor R9 and is grounded; End 2 of the heating plate P1 is connected to the other end of the diode D2, the other end of the resistor R3 and one end of the resistor R4, and is connected to end 2 of the integrated circuit board P12; the other end of the resistor R4 is connected to the other end of the light-emitting diode LED1.

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