CN219694915U

CN219694915U - Temperature control box for optical cavity ring-down spectroscopy device

Info

Publication number: CN219694915U
Application number: CN202320887004.0U
Authority: CN
Inventors: 罗巍然; 马艳霞; 武利伟
Original assignee: Hebei Ziyue Machinery Equipment Co ltd
Current assignee: Hebei Ziyue Machinery Equipment Co ltd
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2023-09-15
Anticipated expiration: 2033-04-19

Abstract

The utility model relates to a temperature control box for an optical cavity ring-down spectroscopy device, which comprises an inner box body and a TEC air conditioner, wherein the inner box body is formed by enclosing an air conditioning plate, a guide plate, a drainage plate, a baffle plate, a top plate and a bottom plate, the inside of the inner box body is a closed cavity, and heat insulation material plates are adhered to one sides of the air conditioning plate, the guide plate, the drainage plate, the baffle plate, the top plate and the bottom plate facing the inner box body. The optical cavity ring-down spectroscopy device is arranged on the bottom plate in the inner box body, and gaps are formed among the optical cavity ring-down spectroscopy device, the air conditioning plate, the guide plate and the baffle plate, so that the influence of the external environment on the temperature in the cavity can be avoided, and the accuracy of data measured by the optical cavity ring-down spectroscopy device is improved. The TEC air conditioner is installed in the middle of the air conditioning plate in a penetrating way, and a radiating fin and a duct fan connected with the hot end of the semiconductor refrigerator are both positioned in the inner box body, so that constant-temperature air flow can flow in the inner box body in a rapid and circular manner and uniformly circulate in the constant-temperature chamber, and the temperature of the constant-temperature chamber is kept balanced and stable to the greatest extent.

Description

Temperature control box for optical cavity ring-down spectroscopy device

Technical Field

The utility model relates to the technical field of cavity ring-down spectroscopy, in particular to a temperature control box for a cavity ring-down spectroscopy device.

Background

Cavity ring-down spectroscopy (CRDS) technology, also known as laser Cavity ring-down absorption spectroscopy (CRLAS), is a very sensitive spectroscopic method that can be used to detect absolute optical extinction of a gaseous sample, including scattering and absorption of light. It has been widely used to detect the absorption of gaseous samples at specific wavelengths and to determine the mole fraction of the sample at the level of parts per trillion.

The cavity ring-down spectroscopy device has very high requirements on the ambient temperature, and small changes in temperature affect the stability of the cavity and the gas in the cavity, resulting in deviations in the measured spectral data, so that the cavity needs to be in a very stable and constant temperature environment. Meanwhile, since the reflector of the resonant cavity needs to have very high cleanliness, in order to prevent the vapor in the gas to be measured from condensing, the temperature of the cavity is generally controlled to be higher than the ambient temperature.

In the prior art, heating and refrigerating elements are mostly adopted to control the temperature of the resonant cavity, but the heating and refrigerating elements are directly connected with the resonant cavity, so that the temperature of the cavity is uneven; in addition, a mode of placing the resonant cavity in a box body and introducing a constant-temperature medium into the box body to control the temperature is adopted, but the circulation condition of the constant-temperature medium in the box is poor, the temperature in the box can be influenced by the external environment temperature, and the temperature of the resonant cavity is inevitably influenced less, so that the accuracy of the measured spectrum data is influenced.

Disclosure of Invention

In order to solve the problems, the utility model provides a temperature control box for an optical cavity ring-down spectroscopy device, which is made of a material with good thermal insulation property, so that the influence of the external environment temperature on the inside of an inner box body and the temperature of a resonant cavity is avoided; the inner box body is designed in a set shape, and the TEC air conditioner is adopted to enable the circulating medium to circularly flow in the inner box body, so that the air conditioner is prevented from being directly connected with a resonant cavity in the optical cavity ring-down spectroscopy device, the circulating medium flows along the inner box body in the set shape, the circulating flow of the circulating medium is uniform, the temperature of the inner box body is kept constant through the circulating medium, the problem of uneven temperature of the cavity of the resonant cavity is avoided, and the accuracy of the measured spectral data is improved.

The technical scheme adopted by the utility model is as follows: the utility model provides a control by temperature change case for optical cavity ring-down spectroscopy device, includes interior box and TEC air conditioner, interior box is enclosed by air conditioner board, guide plate, drainage board, baffling board, roof and bottom plate and is constructed, air conditioner board, guide plate, drainage board, baffling board, roof and bottom plate face all paste to one side in the interior box has the heat preservation material board.

The air conditioner plate and the baffle plate are oppositely arranged, the length of the air conditioner plate is smaller than that of the baffle plate, the two flow guide plates and the two flow guide plates are symmetrically connected to the two ends of the air conditioner plate and extend towards the direction close to the baffle plate, the connecting angles of the flow guide plates and the air conditioner plate are obtuse angles, the two flow guide plates are symmetrically connected to the two ends of the baffle plate, the connecting angles of the flow guide plates and the baffle plate are right angles, the other ends of the flow guide plates are connected with the other ends of the baffle plates on the same side, the top plate covers the upper sides of the air conditioner plate, the flow guide plates and the baffle plate, and the bottom plate covers the air conditioner plate, the flow guide plates, the baffle plate, the top plate and the bottom plate, and the inner box body enclosed by the bottom plate are sealed cavities. Therefore, the chamber has the functions of heat preservation and heat insulation.

The TEC air conditioner is mounted on the air conditioner plate, a through hole is formed in the middle of the air conditioner plate, the TEC air conditioner comprises a semiconductor refrigerator, a radiating fin and a bypass fan, the semiconductor refrigerator is embedded in the through hole and is provided with a cold end and a hot end, the hot end of the semiconductor refrigerator is located inside the inner box, the cold end of the semiconductor refrigerator is located outside the inner box, one side of the radiating fin is connected with the hot end of the semiconductor refrigerator, the other side of the radiating fin is fixedly connected with the bypass fan, the radiating fin and the bypass fan are located in the inner box, and other parts of the TEC air conditioner are located outside the inner box. The cooling fin is fixedly connected with the inner wall of the air conditioner plate, the air inlet port of the ducted fan faces the semiconductor refrigerator vertically, and the air outlet port of the ducted fan faces the baffle plate vertically.

The optical cavity ring-down spectroscopy device is arranged on a bottom plate in the inner box body, and gaps are arranged among the optical cavity ring-down spectroscopy device, the air conditioning plate, the guide plate, the drainage plate and the baffle plate.

The closed inner box body is formed by enclosing the air conditioning plate, the guide plate, the drainage plate, the baffle plate, the top plate and the bottom plate, the heat preservation and heat insulation function of the inner box body is increased through the heat preservation material plate, the inner part of the inner box body is kept constant temperature through the TEC air conditioner, the heat preservation material plate has good heat insulation, a constant temperature cavity in the inner box body is separated from the external environment, the influence of the external environment on the temperature in the cavity can be avoided, a constant temperature environment is provided for the optical cavity ring-down spectroscopy device, the influence of temperature change on the temperature of a resonant cavity is avoided, and the accuracy of data measured by the optical cavity ring-down spectroscopy device is improved.

Through the shape design of interior box, the position and the orientation of the air inlet port and the air outlet port of cooperation duct fan are favorable to interior box internal air current rapid cycle to flow, make constant temperature air current can circulate in whole constant temperature cavity fast evenly to make constant temperature cavity's temperature furthest keep balanced stable.

The air flow of the wind outlet of the duct fan blows out to the direction of the baffle plate, the baffle plate guides the air flow to flow from the middle to the two ends, the air flow after the flow division flows to the direction of the flow guiding plates at the two sides respectively, the air flow can turn and flow to the inner side of the constant temperature chamber at a certain deflection angle at the right angle connection part of the baffle plate and the flow guiding plates, and the air flow can further deflect and turn and flow to the direction of the inner side of the constant temperature chamber at the obtuse angle connection part of the flow guiding plates and the flow guiding plates, and the air flow is guided to flow to the air conditioner plate quickly along the direction of the flow guiding plates, so that the air flow can flow to the middle at the obtuse angle connection position of the flow guiding plates and the air conditioner plate more easily and quickly, and the air flow is guided to the heat led out by the upper culvert after entering the heat radiating fins, and is discharged through the duct fan again, and circulated. Therefore, the shape design of the inner box body is more favorable for the rapid circulation of the air flow in the inner box body, and the constant-temperature air flow can circularly flow in the whole constant-temperature chamber, so that the space temperature of the whole constant-temperature chamber is kept balanced and stable to the maximum extent.

As a further limitation to the technical scheme, the length ratio of the baffle plate to the air conditioner plate is 2.5-3, and the length ratio of the baffle plate to the drainage plate is 4-5. The cavity ring-down spectroscopy device includes a fiber laser, a fiber collimator, a resonant cavity, a laser detector, etc., and these structures in the cavity ring-down spectroscopy device are disclosed in the prior art and are also relatively conventional components in the common cavity ring-down spectroscopy device, so that detailed description of the specific connection structure thereof is omitted herein. The length direction of the resonant cavity is parallel to the baffle plate, the middle part of the resonant cavity is aligned with the center position of the air outlet port of the ducted fan, and the axis of the resonant cavity is aligned with the middle parts of the drainage plates at two ends.

In the technical scheme, the inner box body can accommodate all components such as the optical fiber laser, the optical fiber collimator, the resonant cavity, the laser detector and the like in the optical cavity ring-down spectroscopy device, and because the parts connected with the resonant cavity have heating and heat absorbing phenomena, the resonant cavity is in a constant temperature environment, other components which possibly influence the temperature of the resonant cavity are also in the constant temperature environment, and under the influence of the circulating flow of constant temperature airflow, the influence of the heat absorbing and heating conditions of the other components on the temperature of the resonant cavity can be furthest reduced, and the accuracy of the measured spectral data can be further improved. The ducted fan is arranged at the middle part of the closed cavity, so that the hot air output by the air outlet port is guided in the directions of the baffle plate, the drainage plate, the guide plate and the air conditioner plate after striking against the baffle plate, and two parts of vortex symmetrical with the center line of the baffle plate are formed, so that the air flow circulation in the closed cavity is more uniform, and the overall temperature is more stable and constant.

As a further limitation of the above technical solution, the obtuse angle between the deflector and the air conditioning plate is 150 ° -170 °.

When the obtuse angle between the guide plate and the air conditioning plate is 150-170 degrees, the obtuse angle between the guide plate and the guide plate is 100-120 degrees, so that the constant temperature air flow is more convenient to deflect in the flowing process of the constant temperature chamber, the constant temperature air is more convenient to form rapid circulation in the chamber, circulation dead angles are not easy to occur, and the temperature of each position in the chamber is more uniform.

As a further limitation to the above technical scheme, a sealing ring is disposed at the connection position of the TEC air conditioner and the through hole of the air conditioning plate.

As a further limitation to the above technical scheme, the TEC air conditioner is electrically connected with a TEC air conditioner driving controller, and the TEC air conditioner driving controller is electrically connected with a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is installed on the resonant cavity of the optical cavity ring-down spectroscopy device, and the second temperature sensor is installed on the cooling fin.

TEC is the English abbreviation of semiconductor refrigerator, is totally called Thermo Electric Cooler, and TEC air conditioner adopts semiconductor refrigeration, and temperature control is accurate, and the temperature change response is fast, is applicable to the equipment that is sensitive to the temperature, or battery compartment, is particularly useful for this device. The TEC air conditioner driving controller outputs electric power, namely changing current, to the TEC air conditioner, so that the temperature rising or temperature lowering action of the TEC air conditioner is controlled. The TEC air conditioner, the TEC air conditioner driving controller and the temperature sensor are arranged, so that the temperature in the inner box body is kept constant to the greatest extent. The optional size of the TEC air conditioner is S1-AA-0100-D024-30, the TEC air conditioner driving controller operates in a PID self-tuning mode, the temperature control precision is high, the control mode is programmable control, various parameters and various monitoring quantities can be conveniently set on an upper computer, the TEC air conditioner has high reliability and stability, can normally operate without faults within the average time of 5000 hours, and further ensures that the optical cavity ring-down spectroscopy device can measure more accurate data.

As a further limitation to the above technical solution, the first temperature sensor and the second temperature sensor are PT100 thermal resistance temperature sensors.

As a further limitation to the technical scheme, an outer box body is further covered outside the inner box body, the TEC air conditioner and the TEC air conditioner driving controller are all located inside the outer box body, control and regulation equipment used for guaranteeing operation of the optical cavity ring-down spectroscopy device, the TEC air conditioner and the TEC air conditioner driving controller is further installed in the outer box body, and the TEC air conditioner driving controller and the control and regulation equipment are all located outside the inner box body. The control and regulation equipment comprises a main board, a power supply, a mass flow controller, a laser temperature controller, a piezoelectric ceramic driver, an interface board and the like, wherein the main board is used for uniformly controlling all equipment in the outer box body, the power supply is used for providing electric energy for all equipment in the outer box body, the mass flow controller is used for precisely and quantitatively controlling the flow of gas to be tested, the laser temperature controller is used for precisely controlling the internal working temperature of the fiber laser, the piezoelectric ceramic driver is used for driving the piezoelectric ceramic action installed at the end part of the resonant cavity, so that the optical path length in the resonant cavity is regulated in a periodical change mode, and the interface board is used for providing a connection interface for all equipment in the outer box body to be communicated with the outside. The devices arranged outside the inner box body are heat release devices when working, and are arranged outside the inner box body, so that the influence of heat dissipation of the devices on the constant temperature environment inside the inner box body and the temperature of the optical cavity ring-down spectroscopy device can be avoided.

In the technical scheme, the inner box body can be arranged at intervals with the inner wall of the outer box body, and can also be attached to a side wall of a certain side of the outer box body, and the arrangement of the outer box body enables the constant temperature chamber in the inner box body to be further isolated from the external environment, so that the accuracy of data measured by the optical cavity ring-down spectroscopy device is further improved; temperature control elements (such as heating and refrigerating elements, detectors and the like) required for maintaining a constant temperature environment in the inner box body are all arranged in the outer box body and form integral equipment together with the inner box body.

As a further limitation to the technical scheme, the heat insulation material plate is made of polyphenyl heat insulation material, and the thickness of the heat insulation material plate is not less than 20mm.

As a further limitation to the above technical scheme, the environmental temperature of the closed chamber in the inner box body is stabilized at 40±0.01 ℃.

By adopting the technology, the utility model has the advantages that: the closed inner box body is arranged to hold the cavity ring-down spectroscopy device, so that a constant-temperature environment is provided for the cavity ring-down spectroscopy device, and the problem of uneven cavity temperature caused by direct connection of heating and refrigerating elements with the resonant cavity is solved; the sealed inner box body has good thermal insulation property, and avoids the influence of the external environment temperature on the temperature of the resonant cavity in the inner box body; in addition, the container is designed in a specific shape, so that the internal air flow of the container is easier to quickly and uniformly circulate, the temperature of the resonant cavity is more stable, and the accuracy of the measured spectrum data is improved.

Drawings

FIG. 1 is a schematic view of the internal overall structure of the present utility model;

FIG. 2 is a schematic diagram of the internal overall structure of the present utility model;

in the figure: 101-an air conditioning panel; 102-a deflector; 103-drainage plate; 104-baffles; 201-a fiber laser; 202-a fiber collimator; 203-a resonant cavity; 204-a laser detector; 3-a heat insulation material plate; 4-TEC air conditioner; 401-heat sink; 402-ducted fans; 5-TEC air conditioner driving controller; 6-a first temperature sensor; 7-a second temperature sensor; 8-an outer box body; 9-a main board; 10-power supply; 11-mass flow controller; 12-a piezoelectric ceramic actuator; 13-interface board.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings and specific examples.

As shown in fig. 1, the temperature control box for the optical cavity ring-down spectroscopy device comprises an inner box body and a TEC air conditioner 4, wherein the inner box body is formed by enclosing an air conditioning plate 101, a guide plate 102, a guide plate 103, a baffle plate 104, a top plate and a bottom plate, one sides of the air conditioning plate 101, the guide plate 102, the guide plate 103, the baffle plate 104, the top plate and the bottom plate, which face the inner box body, are respectively stuck with a heat insulation material plate 3, the heat insulation material plate 3 is made of polyphenyl heat insulation materials, the thickness of the heat insulation material plate is not less than 20mm, and the heat insulation material plate increases the heat insulation function of the inner box body.

Wherein the air conditioner plate 101 and the baffle plate 104 are oppositely arranged, and the length of the air conditioner plate 101 is smaller than the length of the baffle plate 104. The opposite arrangement means that the air conditioning plate 101 and the baffle plate 104 are arranged in parallel in the length direction, are arranged at intervals in the thickness direction, and the perpendicular bisecting planes of the two plate surfaces are mutually overlapped. The two flow guide plates 103 and 102 are symmetrically connected to two ends of the air conditioner plate 101, and extend towards the direction close to the baffle plate 104, and the connection angles of the flow guide plates 102 and the air conditioner plate 101 are obtuse angles. The two flow guiding plates 103 are symmetrically connected to the two ends of the baffle plate 104, the connection angles of the flow guiding plates 103 and the baffle plate 104 are right angles, and the other ends of the flow guiding plates 103 are connected with the other ends of the flow guiding plates 102 on the same side. The roof covers in the upside of air conditioning board 101, guide plate 102, drainage board 103 and baffling board 104, and the bottom plate covers in the downside of air conditioning board 101, guide plate 102, drainage board 103 and baffling board 104, and the interior box inside that air conditioning board, guide plate, drainage board, baffling board, roof and bottom plate enclose is airtight cavity. The environment temperature of the closed chamber is stabilized at 40+/-0.01 ℃, and a stable constant temperature space is provided for the cavity ring-down spectroscopy device arranged in the closed chamber.

The optical cavity ring-down spectroscopy device is arranged on a bottom plate in the inner box body, and a gap is arranged among the optical cavity ring-down spectroscopy device, the air conditioning plate 101, the flow guide plate 102, the flow guide plate 103 and the flow baffle 104. The cavity ring-down spectroscopy device comprises a fiber laser 201, a fiber collimator 202, a resonant cavity 203, a laser detector 204 and the like, wherein the length direction of the resonant cavity 203 is parallel to the baffle plate 104, and the axis of the resonant cavity 203 is aligned with the middle parts of the drainage plates 103 at the two ends. The optical cavity ring-down spectroscopy apparatus including the optical fiber laser 201, the optical fiber collimator 202, the resonant cavity 203, and the laser detector 204 are disclosed in the prior art, and the optical fiber laser 201, the optical fiber collimator 202, the resonant cavity 203, and the laser detector 204 are also more conventional components of the common optical cavity ring-down spectroscopy apparatus, so the detailed description of the specific connection structure thereof will not be provided herein.

In this embodiment, the ratio of the length of the baffle 104 to the length of the air conditioning plate 101 is 2.5-3; the length ratio of the baffle plate 104 to the drainage plate 103 is 4-5; the obtuse angle between the baffle 102 and the air conditioning plate 101 is 150 ° -170 °. The inner box body manufactured by referring to the size proportion and the angle has the best air flow circulation flow effect of the inner space.

The TEC air conditioner 4 is arranged on the air conditioning plate 101, a through hole is formed in the middle of the air conditioning plate 101, the TEC air conditioner 4 comprises a semiconductor refrigerator, a radiating fin 401, a ducted fan 402 and the like, the semiconductor refrigerator is embedded in the through hole, the semiconductor refrigerator is provided with a hot end and a cold end, the hot end is positioned in the inner box, the cold end is positioned outside the inner box, one side of the radiating fin 401 is connected with the hot end of the semiconductor refrigerator, and the other side of the radiating fin is fixedly connected with the ducted fan 402. The cooling fin 401 and the ducted fan 402 are both positioned in the inner box body, and other parts of the TEC air conditioner 4 are both positioned outside the inner box body. The cooling fin 401 is fixedly connected with the inner wall of the air conditioner plate 101, the air inlet port of the ducted fan 402 faces the semiconductor refrigerator vertically, the air outlet port of the ducted fan 402 faces the baffle plate 104 vertically, and the middle part of the resonant cavity 203 is aligned with the center position of the air outlet port of the ducted fan 402.

In this embodiment, a sealing ring is disposed at the connection position of the TEC air conditioner 4 and the through hole of the air conditioning plate 101, so as to improve the tightness of the inner chamber of the inner box.

In this embodiment, the TEC air conditioner 4 is electrically connected with a TEC air conditioner driving controller 5, the TEC air conditioner driving controller 5 is located outside the inner box, the TEC air conditioner driving controller 5 is electrically connected with a first temperature sensor 6 and a second temperature sensor 7, the first temperature sensor 6 is installed on the optical cavity ring-down spectroscopy device, and the second temperature sensor 7 is installed on the heat sink 401. Specifically, the first temperature sensor 6 and the second temperature sensor 7 are PT100 thermal resistance temperature sensors.

In this embodiment, the outer portion of the inner box is covered with an outer box 8, the inner box, the TEC air conditioner 4 and the TEC air conditioner driving controller 5 are all located inside the outer box 8, and a control and regulation device for guaranteeing the operation of the optical cavity ring-down spectroscopy device, the TEC air conditioner 4 and the TEC air conditioner driving controller 5 is further installed in the outer box 8 and located outside the inner box. The control and regulation equipment comprises a main board 9, a power supply 10, a mass flow controller 11, a laser temperature controller, a piezoelectric ceramic driver 12, an interface board 13 and the like, wherein the main board 9 is used for uniformly controlling all equipment in the outer box 8, the power supply 10 is used for providing electric energy for all equipment in the outer box 8, the mass flow controller 11 is used for precisely and quantitatively controlling the flow of gas to be measured, the laser temperature controller is used for precisely controlling the internal working temperature of the fiber laser 201, the piezoelectric ceramic driver 12 is used for driving piezoelectric ceramic arranged at the end part of the resonant cavity 203 to act so as to regulate the optical path length in the resonant cavity 203 in a periodical change manner, and the interface board 13 is used for providing a connection interface for all equipment in the outer box 8 to be communicated with the outside. The devices arranged outside the inner box body are heat release devices when working, and are arranged outside the inner box body, so that the influence of heat dissipation of the devices on the constant temperature environment inside the inner box body and the temperature of the optical cavity ring-down spectroscopy device can be avoided.

Working principle: when the air conditioner is used, the air conditioner plate 101, the guide plate 102, the guide plate 103, the baffle plate 104, the top plate and the bottom plate form the closed inner box body, the heat insulation function of the inner box body is increased through the heat insulation material plate 3, the heat insulation material plate 3 has good heat insulation property, the constant-temperature chamber in the inner box body is separated from the external environment, and the influence of the external environment on the temperature in the chamber can be avoided. The TEC air conditioner 4 is arranged to keep the inside of the inner box constant in temperature, so that a constant-temperature environment is provided for the cavity ring-down spectroscopy device, the influence of temperature change on the temperature of the resonant cavity 203 is avoided, and the accuracy of data measured by the cavity ring-down spectroscopy device is improved.

Through the shape design of interior box, the position and the orientation of the air inlet port and the air outlet port of cooperation ducted fan 402 are favorable to interior box internal air current rapid cycle to flow, make the constant temperature air current can circulate in whole constant temperature cavity fast evenly to make the temperature of constant temperature cavity furthest keep balanced stable.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should substitute or change the technical solution according to the technical concept of the present utility model, to cover the scope of the present utility model.

Claims

1. A temperature control box for an optical cavity ring-down spectroscopy device, characterized in that: the heat-insulating box comprises an inner box body and a TEC air conditioner (4), wherein the inner box body is formed by enclosing an air conditioning plate (101), a guide plate (102), a guide plate (103), a baffle plate (104), a top plate and a bottom plate, and heat-insulating material plates (3) are adhered to one sides of the air conditioning plate (101), the guide plate (102), the guide plate (103), the baffle plate (104), the top plate and the bottom plate facing the inner box body;

the air conditioner is characterized in that the air conditioner plates (101) and the baffle plates (104) are oppositely arranged, the length of the air conditioner plates (101) is smaller than that of the baffle plates (104), two guide plates (103) and two guide plates (102) are respectively arranged, the two guide plates (102) are symmetrically connected to the two ends of the air conditioner plates (101) and extend towards the direction close to the baffle plates (104), the connection angles of the guide plates (102) and the air conditioner plates (101) are obtuse angles, the two guide plates (103) are symmetrically connected to the two ends of the baffle plates (104), the connection angles of the guide plates (103) and the baffle plates (104) are right angles, the other ends of the guide plates (103) are connected with the other ends of the guide plates (102) on the same side, and the top plate covers the upper sides of the air conditioner plates (101), the guide plates (102), the guide plates (103) and the baffle plates (104), and the lower sides of the guide plates (102) are covered by the bottom plate (101);

the TEC air conditioner (4) is installed on the air conditioner plate (101), a through hole is formed in the middle of the air conditioner plate (101), the TEC air conditioner (4) comprises a semiconductor refrigerator, a radiating fin (401) and a ducted fan (402), the semiconductor refrigerator is embedded in the through hole, one side of the radiating fin (401) is connected with the hot end of the semiconductor refrigerator, the other side of the radiating fin is fixedly connected with the ducted fan (402), the radiating fin (401) and the ducted fan (402) are both positioned in the inner box body, the radiating fin (401) is fixedly connected with the inner wall of the air conditioner plate (101), an air inlet port of the ducted fan (402) faces towards the semiconductor refrigerator vertically, and an air outlet port of the ducted fan (402) faces towards the baffle plate (104) vertically;

the optical cavity ring-down spectroscopy device is arranged on a bottom plate in the inner box body, and gaps are formed among the optical cavity ring-down spectroscopy device, the air conditioning plate (101), the guide plate (102), the guide plate (103) and the baffle plate (104).

2. A temperature-controlled enclosure for an optical cavity ring-down spectroscopy device as defined in claim 1, wherein: the length ratio of the baffle plate (104) to the air conditioner plate (101) is 2.5-3, the length ratio of the baffle plate (104) to the drainage plate (103) is 4-5, the cavity ring-down spectroscopy device comprises a fiber laser (201), a fiber collimator (202), a resonant cavity (203) and a laser detector (204), the length direction of the resonant cavity (203) is parallel to the baffle plate (104), and the middle part of the resonant cavity (203) is aligned with the center position of an air outlet port of the ducted fan (402).

3. A temperature-controlled enclosure for an optical cavity ring-down spectroscopy device as defined in claim 2, wherein: the obtuse angle between the guide plate (102) and the air conditioning plate (101) is 150-170 degrees.

4. A temperature-controlled enclosure for an optical cavity ring-down spectroscopy device as defined in claim 1, wherein: and a sealing ring is arranged at the joint of the TEC air conditioner (4) and the through hole of the air conditioning plate (101).

5. A temperature-controlled enclosure for an optical cavity ring-down spectroscopy device as defined in claim 4, wherein: the TEC air conditioner (4) is electrically connected with a TEC air conditioner driving controller (5), the TEC air conditioner driving controller (5) is electrically connected with a first temperature sensor (6) and a second temperature sensor (7), the first temperature sensor (6) is installed on the optical cavity ring-down spectroscopy device, and the second temperature sensor (7) is installed on the radiating fin (401).

6. A temperature-controlled enclosure for an optical cavity ring-down spectroscopy device as defined in claim 5, wherein: and the first temperature sensor (6) and the second temperature sensor (7) are PT100 thermal resistance temperature sensors.

7. A temperature-controlled enclosure for an optical cavity ring-down spectroscopy device as defined in claim 5, wherein: the utility model discloses a light cavity ring-down spectroscopy device, TEC air conditioner drive controller, including inner box, outer box (8) are equipped with in the outer cover of inner box, TEC air conditioner (4) and TEC air conditioner drive controller (5) all are located inside outer box (8), still install in outer box (8) and be used for the guarantee the light cavity ring-down spectroscopy device TEC air conditioner (4) reaches TEC air conditioner drive controller (5) operation's control governing equipment, TEC air conditioner drive controller (5) with control governing equipment all is located the inner box is outside.

8. A temperature-controlled enclosure for a cavity ring-down spectroscopy apparatus according to any one of claims 1-3, wherein: the heat insulation material plate (3) is made of polyphenyl heat insulation material, and the thickness of the heat insulation material plate (3) is not less than 20mm.

9. A temperature-controlled enclosure for a cavity ring-down spectroscopy apparatus according to any one of claims 1-3, wherein: the environmental temperature of the closed cavity in the inner box body is stabilized at 40+/-0.01 ℃.