High-precision constant temperature control system

Abstract

The invention relates to a high-precision constant-temperature control system, and relates to the field of temperature control systems, the high-precision constant-temperature control system comprises a building assembly, a cooling assembly, a gas flow driving assembly and N temperature rise adjusting assemblies, and a gas backflow channel communicated with an air outlet and an air return opening of a laboratory is formed in the building assembly; the cooling assembly, the gas flow driving assembly and the multiple temperature rise adjusting assemblies are all connected to the gas backflow channel in series, the gas flow driving assembly can drive gas to flow in the gas backflow channel, the cooling assembly can cool the gas to Ta, and the N temperature rise adjusting assemblies can adjust the gas temperature from Ta to T and T1lt; t. The method has the advantages that the temperature is reduced to the low temperature Ta and then increased to the specified temperature T, temperature changes can be controlled more finely, overshoot and fluctuation are reduced, and therefore the effect of higher temperature control accuracy is achieved.

Description

Technical Field

[0001] The present application relates to the field of temperature control systems, and in particular to a high-precision constant temperature control system. Background Art

[0002] Constant temperature laboratories, also often called environmental control laboratories, are mainly used to maintain a stable temperature and humidity environment to meet the needs of various experiments and tests. The development of the laboratory constant temperature equipment industry is driven by the growing demand for thermostats in scientific research, education and industrial upgrading.

[0003] In the temperature control system of the existing constant temperature laboratory, the temperature adjustment module acts directly on the return air system, adjusts the temperature of the return air to the specified temperature T, and then passes it into the laboratory again to achieve the constant temperature of the laboratory. However, directly adjusting the return air to the specified temperature T requires the temperature adjustment rate of the temperature adjustment module to be too fast, resulting in temperature overshoot or fluctuation, which in turn leads to poor accuracy of temperature control in the laboratory. Summary of the invention

[0004] In order to improve the problem of directly adjusting the return air to a specified temperature, which causes temperature overshoot or fluctuation, and further leads to poor accuracy of temperature control in the laboratory, the present application provides a high-precision constant temperature control system.

[0005] The high-precision constant temperature control system provided in this application adopts the following technical solution: A high-precision constant temperature control system, comprising a building component, a cooling component, a gas flow drive component, and N temperature adjustment components. A gas reflux channel connected to the air outlet and return air outlet of a laboratory is formed inside the building component. The cooling component, the gas flow drive component, and a plurality of temperature adjustment components are connected in series to the gas reflux channel. The gas flow drive component can drive the gas to flow in the gas reflux channel. The cooling component can cool the gas to Ta. The N temperature adjustment components can adjust the gas temperature from Ta to T, T1 <T。

[0006] By adopting the above technical solution, when the temperature in the laboratory is controlled, the gas flow driving component sucks the air in the laboratory into the gas return channel through the return air port, the temperature of the gas is reduced to Ta by the cooling component, and the cooled gas is then passed through N temperature increasing regulating components to raise the temperature of the gas to T, and then enters the laboratory through the air outlet to achieve constant temperature control of the laboratory. The present application first reduces the temperature to a low temperature Ta and then increases it to a specified temperature T, which can more finely control temperature changes, reduce overshoot and fluctuations, and thus achieve higher temperature control accuracy.

[0007] In a specific possible implementation scheme, the cooling component includes a cooling disk group and a cooling water circulation system. The cooling disk group is arranged in the gas reflux channel and is connected to the building component. The air in the gas reflux channel can flow through the cooling disk group to adjust the temperature of the gas to Ta. The cooling water circulation system is connected to the cooling disk group to provide cooling water for the cooling disk group.

[0008] By adopting the above technical solution, the heat exchange between the cooling water flowing in the cooling disk group and the gas is utilized to cool down the reflux gas in the gas reflux channel.

[0009] In a specific feasible implementation scheme, the cooling disk group includes a plurality of heat exchange disks, and each of the heat exchange disks is arranged at intervals along the vertical direction in the gas reflux channel, a gas channel for gas circulation is formed between two adjacent heat exchange disks, a heat exchange cavity for cooling water flow is formed inside the heat exchange disk, and a water inlet and a water outlet connected to the heat exchange cavity are provided on the heat exchange disk, the water inlet is connected to the cooling water circulation system through a water inlet pipe so that the cooling water can flow into the heat exchange cavity, and the water outlet is connected to the cooling water circulation system through a water outlet pipe so that the water after heat exchange in the heat exchange cavity can flow back to the cooling water circulation system.

[0010] By adopting the above technical solution, the cooling water circulation system uses the water inlet pipe to pass the cooling water into the heat exchange cavity in the heat exchange disk. The air exchanges heat with the heat exchange disk and the cooling water through the gas channel. The cooling water after heat exchange flows into the cooling water circulation system through the water outlet pipe to circulate the cooling water. The heat exchange disk is used to cool the gas in layers, thereby increasing the heat exchange area between the gas and the heat exchange disk, thereby improving the efficiency of gas heat exchange.

[0011] In a specific possible implementation manner, the front end of the upper heat exchange disk extends beyond the front end of the lower heat exchange disk in the opposite direction of the airflow, so that the connecting line of the two side ends of several heat exchange disks forms a parallelogram.

[0012] By adopting the above technical solution and utilizing the parallelogram design at the end of the heat exchange disk, the heat exchange range of the cooling disk group along the gas flow direction can be increased, thereby extending the gas heat exchange time. While ensuring that the cooling temperature remains unchanged, the amount of cooling water used can be reduced, achieving an energy-saving effect.

[0013] In a specific feasible implementation scheme, a water retaining portion is fixedly provided on the top of the heat exchanger plate, and the water retaining portion and the building assembly form a water collecting trough, and a drain outlet is formed at the tail of the heat exchanger plate. Condensate in the water collecting trough on the upper heat exchanger plate can flow along the drain outlet into the water collecting trough on the lower heat exchanger plate.

[0014] By adopting the above technical solution, when the cooling water cools the gas, condensation will occur on the heat exchange plate, and then the condensation will fall into the water collecting tank below, so that the condensation will be collected. When the condensation falls, it will be affected by the gas flow and deflected in the direction of the gas flow. The parallelogram design of the heat exchange plate can increase the collection area of ​​the water collecting tank for the condensation, thereby improving the convenience of collecting the condensation.

[0015] In a specific feasible implementation scheme, a drainage box is provided on the building component, and the drainage box is arranged at the tail of the heat exchange disk at the lowest point. The middle of the drainage box is bent to form a bent portion. The drainage box is provided with a water collection port and a drain port on both sides of the bent portion. The drain port is located outside the building component. Condensation water on the heat exchange disk can flow into the drainage box through the water collection port. The drainage box is filled with a sealed water body at the bent portion so as to separate the interior of the drainage box into a water inlet chamber and a drainage chamber isolated from each other. The water collection port is communicated with the water inlet chamber, and the drain port is communicated with the drainage chamber.

[0016] By adopting the above technical solution, condensed water is discharged from the drain port at the tail end of the heat exchanger disc and enters the drain box through the water collecting port, thereby increasing the amount of sealed water in the drain box. The increased amount of water is then discharged through the drain port, thereby achieving the discharge of condensed water while ensuring the sealing of the gas reflux channel, thereby facilitating the discharge of condensed water.

[0017] In a specific embodiment, the gas flow driving component includes a fan, which is connected in series to the gas return channel to drive the gas to circulate in the gas return channel and the laboratory.

[0018] By adopting the above technical solution and utilizing the operation of the fan, the flow of gas in the gas reflux channel is achieved.

[0019] In a specific possible implementation scheme, N of the temperature increase regulating components are arranged downstream of the gas flow driving component, and each of the temperature increase regulating components can increase the temperature of the gas by an amplitude of ΔT, and Ta+N*ΔT=T.

[0020] By adopting the above technical solution, multiple temperature increase and adjustment components can evenly increase the temperature of the gas, reducing the temperature control and adjustment process, which helps to improve the accuracy and efficiency of temperature control, and can also reduce temperature fluctuations and improve the stability of the temperature control system.

[0021] In a specific possible implementation mode, the temperature rise adjustment component includes a plurality of electric heating plates, and the plurality of electric heating plates are arranged in the gas reflux channel, and a heating channel for gas flow is formed between two adjacent electric heating plates.

[0022] By adopting the above technical solution, the temperature of the gas is increased by energizing the electric heating plate to generate heat.

[0023] In a specific feasible implementation scheme, the building component is provided with a gas supply port connected to the gas reflux channel, the gas supply port is located upstream of the cooling component, and a dust removal module is provided in the gas reflux channel, the dust removal module is located between the gas supply port and the cooling component.

[0024] By adopting the above technical solution, the gas supply port is used to supplement the gas in the gas reflux channel to ensure sufficient gas, and then the gas is filtered through the dust removal module to reduce the dust content in the gas, thereby improving the cleanliness of the air in the laboratory.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. When controlling the temperature in the laboratory, the gas flow driving component sucks the air in the laboratory into the gas return channel through the return air port, and the temperature of the gas is reduced to Ta by the cooling component. The cooled gas then passes through N temperature increasing regulating components to raise the temperature of the gas to T, and then enters the laboratory through the air outlet to achieve constant temperature control of the laboratory. This application first reduces the temperature to a low temperature Ta and then raises it to a specified temperature T, which can more finely control temperature changes, reduce overshoot and fluctuations, and thus achieve higher temperature control accuracy; 2. The parallelogram design at the end of the heat exchange plate can increase the heat exchange range of the cooling plate group along the gas flow direction, thereby extending the gas heat exchange time. While ensuring that the cooling temperature remains unchanged, the amount of cooling water can be reduced to achieve energy-saving effects; 3. Multiple temperature adjustment components evenly heat the gas, reducing the temperature control adjustment process, helping to improve the accuracy and efficiency of temperature control, and can also reduce temperature fluctuations and improve the stability of the temperature control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a high-precision constant temperature control system according to an embodiment of the present application.

[0027] Figure 2 It is an exploded view used to show the gas recirculation channel.

[0028] Figure 3 is along Figure 1 Section view along line AA.

[0029] Figure 4 yes Figure 3 Enlarged view of part B in the middle.

[0030] Figure 5 It is a schematic diagram used to show the structure of the cooling assembly.

[0031] Figure 6 is along Figure 5 Sectional view along the CC line.

[0032] Description of reference numerals: 1. building assembly; 11. frame; 12. partition; 13. gas reflux channel; 14. air supply port; 15. dust removal module; 2. cooling assembly; 21. cooling disk assembly; 211. heat exchange disk; 212. gas channel; 213. heat exchange cavity; 214. water inlet; 215. water outlet; 216. water retaining part; 217. water collecting tank; 218. water outlet; 22. cooling water circulation system; 221. water inlet pipe; 2 22. Cooling water supply pipeline; 224. Cooling water return pipeline; 225. Water outlet pipe; 23. Installation frame; 3. Gas flow drive component; 31. Fan; 4. Temperature regulation component; 41. Electric heating plate; 42. Heating channel; 5. Laboratory; 51. Air outlet; 52. Return air outlet; 6. Drain box; 61. Bending part; 62. Water collection port; 63. Drain outlet; 64. Sealed water body; 65. Water inlet chamber; 66. Drain chamber. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] The embodiment of the present application discloses a high-precision constant temperature control system.

[0035] Reference Figure 1 , Figure 2 A high-precision constant temperature control system includes a building component 1, a cooling component 2, a gas flow driving component 3, and N temperature adjustment components 4. There are two sets of constant temperature control systems in this embodiment, and the two sets of constant temperature control systems are symmetrically arranged on both sides of the laboratory 5. The building component 1 includes a frame 11 and a partition 12. The frame 11 is installed on the outer wall of the laboratory 5. Multiple partitions 12 are installed on the frame 11 to form multiple square compartments. The multiple square compartments are interconnected to form a gas reflux channel 13. One end of the gas reflux channel 13 is connected to the air outlet 51 at the top of the laboratory 5, and the other end is connected to the return air port 52 at the bottom of the laboratory 5, so that the gas is blown into the laboratory 5 from the air outlet 51 at the top of the laboratory 5, and enters the gas reflux channel 13 from the return air port 52 at the bottom of the laboratory 5. The cooling component 2, the gas flow driving component 3 and the multiple temperature adjustment components 4 are all connected in series on the gas reflux channel 13. The gas flow driving component 3 drives the gas to flow in the gas reflux channel 13, forming a circulation flow of the gas in the gas reflux channel 13 and the laboratory 5. The cooling component 2 can cool the gas to Ta, and the N temperature adjustment components 4 can adjust the gas temperature from Ta (°C) to T (°C), and T1 <T。

[0036] When controlling the temperature in the laboratory 5, the gas flow driving component 3 sucks the air in the laboratory 5 into the gas return channel 13 through the return air port 52. The temperature of the gas is reduced to Ta by the cooling component 2. The cooled gas then passes through N temperature increasing regulating components 4 to increase the gas temperature to T, and then enters the laboratory 5 through the air outlet 51 to achieve constant temperature control of the laboratory 5. The present application first reduces the temperature to a low temperature Ta and then increases the temperature to a specified temperature T. This can more finely control temperature changes, reduce overshoot and fluctuations, and thus achieve higher temperature control accuracy.

[0037] Reference Figure 2 , Figure 3 The partition 12 in the building component 1 is covered with a soundproof board, which can reduce the noise caused by the gas flow and reduce the intensity of the noise in the laboratory 5. The partition 12 of the building component 1 is provided with a gas supply port 14, which is located upstream of the cooling component 2, and a sealing member matched with the gas supply port 14 is provided on the partition 12. The gas supply port 14 is used to supplement the gas in the gas reflux channel 13 to ensure sufficient gas. The building component 1 is provided with a dust removal module 15 in the gas reflux channel 13. The dust removal module 15 in this embodiment is a cartridge dust collector. The dust removal module 15 is arranged between the cooling component 2 and the gas supply port 14, so that the gas in the gas reflux channel 13 and the gas supplied from the gas supply port 14 are dedusted by the dust collector, reducing the dust content in the gas and improving the cleanliness of the air in the laboratory 5.

[0038] Reference Figure 4 , Figure 5 and Figure 6 The cooling assembly 2 in this embodiment includes a cooling disk group 21 and a cooling water circulation system 22. The cooling disk group 21 in this embodiment includes a plurality of heat exchange disks 211. The building assembly 1 is provided with a mounting frame 23 for being placed in the gas reflux channel 13. The heat exchange disks 211 are arranged in the mounting frame 23 at intervals along the vertical direction. The heat exchange disks 211 are arranged in parallel, and a gas channel 212 for gas circulation is formed between two adjacent heat exchange disks 211. A heat exchange chamber 213 for cooling water to flow is formed inside the heat exchange disk 211. A water inlet 214 and a water outlet 215 connected to the heat exchange chamber 213 are provided on the heat exchange disk 211. The water inlet 214 and the water outlet 215 are located at both ends of the heat exchange disk 211. Each water inlet 214 is connected to a cooling water supply pipe 222 in the cooling water circulation system 22 through a water inlet pipe 221, so that cooling water can flow into the heat exchange chamber 213. Each water outlet 215 is connected to a cooling water return pipe 224 in the cooling water circulation system 22 through a water outlet pipe 225, so that the water after heat exchange in the heat exchange chamber 213 flows back to the cooling water circulation system 22. The cooling water after heat exchange in the cooling water circulation system 22 is cooled by the radiator and flows back to the cooling water return pipe 224 again.

[0039] Reference Figure 4 , Figure 5 and Figure 6 The front end of the heat exchange disk 211 from top to bottom extends to the front end of the heat exchange disk 211 below in the opposite direction of the airflow, so that the connecting line of the ends of the two sides of the heat exchange disks 211 forms a parallelogram. The extended length of the heat exchange disk 211 can be designed according to the needs. The parallelogram design of the ends of the heat exchange disk 211 can increase the heat exchange range of the cooling disk group 21 along the gas flow direction, thereby extending the gas heat exchange time. Under the condition of ensuring that the cooling temperature remains unchanged, the amount of cooling water can be reduced to achieve energy saving effect.

[0040] When the gas in the gas reflux channel 13 passes through the heat exchange disk 211, it is divided into multiple layers and enters the gas channel 212. The gas exchanges heat with the heat exchange disk 211 and the cooling water. The cooling water after heat exchange flows into the cooling water circulation system 22 through the outlet pipe 225 to circulate the cooling water. The heat exchange disk 211 is used to cool the gas in layers to increase the heat exchange area between the gas and the heat exchange disk 211, thereby improving the efficiency of gas heat exchange. The temperature of the gas after cooling through the cooling disk group 21 is Ta. A temperature sensor is provided at the end outlet of the cooling disk group 21 of the gas reflux channel 13 to detect the temperature of the gas.

[0041] Reference Figure 4 , Figure 5 The front end of the top wall of the heat exchange disk 211 is provided with a water retaining portion 216. The water retaining portion 216 and the partition 12 in the building component 1 form a water collecting tank 217 on the top wall of the heat exchange disk 211, and a water outlet 218 is formed at the tail of the water collecting tank 217. The condensed water in the water collecting tank 217 on the upper heat exchange disk 211 can flow along the water outlet 218 to the water collecting tank 217 on the lower heat exchange disk 211. The building component 1 is provided with a drainage box 6 below the gas reflux channel 13. The middle of the drainage box 6 is bent to form a bending portion 61, so that the drainage box 6 is V-shaped. The drainage box 6 is provided with a water collecting port 62 and a drainage port 63 on both sides of the bending portion 61. The water collecting port 62 is inserted into the gas reflux channel 13 and is located below the water outlet 218 of the heat exchange disk 211 at the lowest position. The condensed water in the water collecting tank 217 flows through the water outlet 218 to the water collecting port 62. The drain outlet 63 is located outside the building assembly 1 , and the drain box 6 is filled with a sealed water body 64 at the bent portion 61 , dividing the interior of the drain box 6 into a water inlet chamber 65 and a drainage chamber 66 that are isolated from each other, the water collection port 62 is connected to the water inlet chamber 65 , and the drain outlet 63 is connected to the drainage chamber 66 .

[0042] When the cooling water cools the gas, it will condense on the heat exchange plate 211, and then the condensed water will fall into the water collection tank 217 below to collect the condensed water. When the condensed water falls, it will be affected by the gas flow and deflected in the direction of the gas flow. The parallelogram design of the heat exchange plate 211 can increase the collection area of ​​the water collection tank 217 for the condensed water, and improve the convenience of collecting the condensed water. The condensed water is discharged from the water outlet 218 at the tail of the heat exchange plate 211, and enters the drainage box 6 through the water collection port 62, so that the amount of the sealed water body 64 in the drainage box 6 increases, and then the increased water is discharged through the drainage port 63, so that the condensed water is discharged while ensuring the sealing of the gas reflux channel 13, which is convenient for the discharge of the condensed water.

[0043] Reference Figure 3 The gas flow driving component 3 in this embodiment includes a fan 31, which is connected in series to the gas reflux channel 13 to drive the gas to circulate in the gas reflux channel 13 and the laboratory 5.

[0044] Reference Figure 3 In this embodiment, N=3 is taken as an example, that is, three temperature-raising adjustment components 4 are located between the fan 31 and the air outlet 51, and each temperature-raising adjustment component 4 raises the temperature of the gas by ΔT, and Ta+N*ΔT=T. Multiple temperature-raising adjustment components 4 raise the temperature of the gas uniformly, reducing the temperature control adjustment process, helping to improve the accuracy and efficiency of temperature control, and can also reduce temperature fluctuations and improve the stability of the temperature control system.

[0045] Reference Figure 3 Each temperature regulating component 4 includes a plurality of electric heating plates 41, and the plurality of electric heating plates 41 are arranged in the gas reflux channel 13, and a heating channel 42 for gas flow is formed between two adjacent electric heating plates 41. When the gas flows through the heating channel 42, the electric heating plate 41 heats the gas, and the temperature of the gas is conveniently controlled by electric heating. In order to facilitate the control of the temperature of each temperature regulating component 4 after post-heating, a temperature sensor is provided at the end of each temperature regulating component 4 to facilitate timely monitoring of the temperature of the gas. The gas reflux channel 13 is provided with an arc guide plate at the corner of the fan 31 and the air outlet 51 to reduce the sound of the airflow hitting the partition 12 and reduce the noise of the laboratory 5.

[0046] The implementation principle of a high-precision constant temperature control system in an embodiment of the present application is as follows: when controlling the temperature in the laboratory 5, the fan 31 draws the air in the laboratory 5 into the gas return channel 13 through the return air port 52, and the gas exchanges heat with the cooling water through the air flow channel, and the temperature is reduced to Ta. The cooled gas then passes through three temperature increase adjustment components 4 to increase the gas temperature to T, and then enters the laboratory 5 through the air outlet 51 to achieve constant temperature control of the laboratory 5. The present application first reduces the temperature to a low temperature Ta and then increases the temperature to a specified temperature T, which can more finely control temperature changes, reduce overshoot and fluctuations, and thus achieve higher temperature control accuracy.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision constant temperature control system, characterized in that: The invention comprises a building component (1), a cooling component (2), a gas flow driving component (3), and N temperature regulating components (4); a gas reflux channel (13) connected to an air outlet (51) and an air return port (52) of a laboratory (5) is formed inside the building component (1); the cooling component (2), the gas flow driving component (3), and the plurality of temperature regulating components (4) are all connected in series to the gas reflux channel (13); the gas flow driving component (3) can drive the gas to flow in the gas reflux channel (13); the cooling component (2) can cool the gas to Ta; the N temperature regulating components (4) can regulate the gas temperature from Ta to T, T1 <T。 2. The high-precision constant temperature control system according to claim 1, characterized in that: The cooling component (2) comprises a cooling disk group (21) and a cooling water circulation system (22); the cooling disk group (21) is arranged in the gas reflux channel (13) and is connected to the building component (1); the air in the gas reflux channel (13) can flow through the cooling disk group (21) so as to adjust the temperature of the gas to Ta; the cooling water circulation system (22) is connected to the cooling disk group (21) so as to provide cooling water for the cooling disk group (21).

3. The high-precision constant temperature control system according to claim 2, characterized in that: The cooling disk group (21) comprises a plurality of heat exchange disks (211), wherein each of the heat exchange disks (211) is arranged in a vertically spaced manner in the gas reflux channel (13), and a gas channel (212) for gas circulation is formed between two adjacent heat exchange disks (211). A heat exchange cavity (213) for cooling water to flow is formed inside the heat exchange disk (211). A water inlet (214) and a water outlet (215) which are in communication with the heat exchange cavity (213) are provided on the heat exchange disk (211). The water inlet (214) is connected to the cooling water circulation system (22) via a water inlet pipe (221) so that the cooling water can flow into the heat exchange cavity (213). The water outlet (215) is connected to the cooling water circulation system (22) via a water outlet pipe (225) so that the water after heat exchange in the heat exchange cavity (213) can flow back to the cooling water circulation system (22).

4. The high-precision constant temperature control system according to claim 3, characterized in that: The front end of the upper heat exchange disk (211) extends beyond the front end of the lower heat exchange disk (211) in the opposite direction of the airflow, so that the connecting line of the two side ends of a plurality of the heat exchange disks (211) forms a parallelogram.

5. The high-precision constant temperature control system according to claim 4, characterized in that: A water retaining portion (216) is fixedly provided on the top of the heat exchange disk (211), the water retaining portion (216) and the building assembly (1) enclose a water collecting trough (217), and a water droplet (218) is formed at the tail of the heat exchange disk (211), and condensed water in the water collecting trough (217) on the upper heat exchange disk (211) can flow along the water droplet (218) into the water collecting trough (217) on the lower heat exchange disk (211).

6. The high-precision constant temperature control system according to claim 5, characterized in that: The building component (1) is provided with a drainage box (6), the drainage box (6) being arranged at the tail of the heat exchange disk (211) at the lowest point, the middle of the drainage box (6) being bent to form a bent portion (61), the drainage box (6) being provided with a water collection port (62) and a drainage port (63) on both sides of the bent portion (61), the drainage port (63) being located outside the building component (1), the condensed water on the heat exchange disk (211) being able to flow into the drainage box (6) through the water collection port (62), the drainage box (6) being filled with a sealed water body (64) at the bent portion (61) so as to separate the interior of the drainage box (6) into a water inlet chamber (65) and a drainage chamber (66) which are isolated from each other, the water collection port (62) being connected to the water inlet chamber (65), and the drainage port (63) being connected to the drainage chamber (66).

7. The high-precision constant temperature control system according to claim 1, characterized in that: The gas flow driving component (3) comprises a fan (31), and the fan (31) is connected in series to the gas reflux channel (13) so as to be able to drive the gas to circulate in the gas reflux channel (13) and the laboratory (5).

8. The high-precision constant temperature control system according to claim 1, characterized in that: The N temperature increasing adjustment components (4) are all arranged downstream of the gas flow driving component (3), and each temperature increasing adjustment component (4) is capable of increasing the temperature of the gas by an amplitude of ΔT, and Ta+N*ΔT=T.

9. The high-precision constant temperature control system according to claim 8, characterized in that: The temperature rise regulating component (4) comprises a plurality of electric heating plates (41), wherein the plurality of electric heating plates (41) are arranged in the gas reflux channel (13), and a heating channel (42) for gas flow is formed between two adjacent electric heating plates (41).

10. The high-precision constant temperature control system according to claim 1, characterized in that: The building component (1) is provided with a gas supply port (14) connected to the gas return channel (13), and the gas supply port (14) is located upstream of the cooling component (2). A dust removal module (15) is provided in the gas return channel (13), and the dust removal module (15) is located between the gas supply port (14) and the cooling component (2).

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