Environmental test box

Abstract

The invention relates to the technical field of test boxes, in particular to an environmental test box which comprises a mechanical chamber provided with a driving module and a power module, the mechanical chamber is isolated from outside air, a first fan, a first heat exchanger and a second heat exchanger are arranged in the mechanical chamber, and the driving module is located between the first heat exchanger and the second heat exchanger. The second heat exchanger is located between the driving module and the power module; under the action of the first fan, airflow in the mechanical chamber enters the first fan from the air inlet end of the first fan, then sequentially passes through the first heat exchanger, the driving module, the second heat exchanger and the power module from the air outlet end of the first fan and then flows back to the air inlet end of the first fan, and circulation is conducted in this way. When the environment test box is used, heat generated by working of the power module and the driving module is taken away by cooling media (circulating cooling water) of the first heat exchanger and the second heat exchanger, graded cooling of the driving module and the power module is achieved, and meanwhile external dust is prevented from invading a machine room.

Description

Technical Field

[0001] This invention relates to the field of test chamber technology, and in particular to an environmental test chamber. Background Technology

[0002] Currently, an existing patent (publication number: CN218502080U) describes an air-cooled high and low temperature test chamber, comprising a mechanical chamber, a power distribution cabinet, and a test chamber body. The mechanical chamber houses a refrigeration unit for providing cooling air. Finned condensers are located at the bottom of the test chamber body and the top of the mechanical chamber. An inward-facing axial flow fan is located at the bottom of the test chamber body, and an outward-facing axial flow fan is located at the top of the mechanical chamber. Ventilation openings are provided on all four sides of the bottom and the top of the air-cooled high and low temperature test chamber, with the top ventilation opening located directly above the mechanical chamber. This air-cooled high and low temperature test chamber forms a circulating heat dissipation channel at the bottom of the equipment and in the area of ​​the mechanical chamber. The axial flow fan and finned condenser within the channel create a highly efficient air-cooled heat dissipation system, improving the equipment's heat dissipation effect and effectively dissipating the large amount of heat generated during the operation of the refrigeration unit in the mechanical chamber. This helps improve the working environment temperature inside the mechanical chamber and ensures the stability of the refrigeration unit's operation.

[0003] Although the existing test chambers can effectively dissipate the large amount of heat generated inside the machine chamber during use, the use of air cooling mode requires a large amount of heat exchange with the outside air, which causes dust from the outside air to enter the machine chamber. Over long-term use, this will affect the operation of the equipment inside the machine chamber, thereby affecting the service life and stability of the environmental test chamber. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide an environmental test chamber that solves the technical problem that the mechanical chamber of the existing test chamber uses air cooling mode for cooling, which requires a large amount of heat exchange with the outside air, resulting in dust in the outside air entering the mechanical chamber.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An environmental test chamber includes a mechanical chamber equipped with a drive module and a power module. The mechanical chamber is isolated from the outside air. A first fan, a first heat exchanger, and a second heat exchanger are disposed within the mechanical chamber. The drive module is located between the first heat exchanger and the second heat exchanger, and the second heat exchanger is located between the drive module and the power module. Under the action of the first fan, the airflow in the mechanical chamber enters the first fan from its inlet, then flows from the outlet of the first fan through the first heat exchanger, the drive module, the second heat exchanger, and the power module in sequence, and then flows back to the inlet of the first fan, thus circulating in this manner.

[0006] Furthermore, the environmental test chamber of the present invention also includes a test chamber body, which is located on one side of the machine room. The test chamber body contains a test chamber, and the test chamber body is also equipped with a second fan and a third heat exchanger. The third heat exchanger is located on one side of the test chamber. Under the action of the second fan, the airflow in the test chamber body enters the second fan from the air inlet end of the second fan, then flows from the air outlet end of the second fan through the test chamber and the third heat exchanger in sequence, and then flows back to the air inlet end of the second fan, thus circulating.

[0007] Furthermore, the top edge of the third heat exchanger is flush with the top edge of the test chamber, and the top edge of the third heat exchanger, the top edge of the test chamber, and the top wall of the test chamber form a first air duct. The first air duct is connected to the air inlet of the second fan. The side wall of the third heat exchanger facing away from the test chamber and the side wall of the test chamber form a second air duct. The second air duct is connected to the first air duct to form an L-shaped air duct.

[0008] Furthermore, a heater is installed on the top of the test chamber to regulate the temperature of the airflow entering the second fan.

[0009] Furthermore, the top of the test chamber is provided with an air inlet and an air outlet, both of which are connected to an L-shaped air duct. A first control valve is provided in the air inlet to control the airflow rate entering the L-shaped air duct from the outside. A second control valve is provided in the air outlet to control the airflow rate discharging from the test chamber to the outside.

[0010] Furthermore, a first guide plate is also provided inside the test chamber. The first guide plate and the side of the test chamber facing away from the third heat exchanger form a first guide channel, which is used to guide the airflow discharged from the outlet of the second fan into the test chamber.

[0011] Furthermore, a second guide plate is provided in the mechanical chamber, and a second guide channel is formed between the second guide plate and the first heat exchanger for guiding the airflow discharged from the outlet of the first fan into the first heat exchanger.

[0012] Furthermore, a partition is also provided in the machine room. The partition is located on top of the first heat exchanger, the drive module, the second heat exchanger, and the power module. The partition and the top wall of the machine room form a third air duct. The power module and one side wall of the machine room form a fourth air duct. The fourth air duct is perpendicular to the third air duct. The partition has a connecting part that connects the third air duct and the fourth air duct.

[0013] Furthermore, a temperature detector is also installed in the machine room to monitor the temperature inside the machine room in real time.

[0014] Furthermore, a humidity transmitter is also installed in the machine room to monitor the humidity inside the machine room in real time.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In use, the environmental test chamber of this invention isolates the mechanical chamber from the outside air, and a closed airflow circulation path driven by a first fan is set within the mechanical chamber. The airflow sequentially passes through the first heat exchanger, the drive module, the second heat exchanger, and the power module, before returning to the first fan. Thus, the heat generated by the power module is exchanged with the first heat exchanger and then carried away by its cooling medium (circulating cooling water). Similarly, the heat generated by the drive module is exchanged with the second heat exchanger and then carried away by its cooling medium (circulating cooling water). This achieves staged cooling of the drive module and the power module, ensuring that the temperature within the mechanical chamber remains within the normal operating temperature range and enhancing the heat dissipation capacity of the environmental test chamber under high-power load conditions. Therefore, the environmental test chamber of this invention, without relying on external ventilation, can isolate the mechanical chamber from the outside air using a water-cooling mode, thereby preventing external dust from entering the mechanical chamber and ensuring the long-term operational stability of the environmental test chamber. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of the environmental test chamber according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the mechanical room according to an embodiment of the present invention; Figure 3 This is a top view of the environmental test chamber of the present invention.

[0017] Numbers in the attached drawings: 1. Test chamber; 10. Third heat exchanger; 11. Heater; 12. Air inlet; 120. First control valve; 13. Exhaust outlet; 130. Second control valve; 14. First guide plate; 15. First guide channel; 16. First air duct; 17. Second air duct; 18. Second fan; 19. Test chamber; 2. Mechanical room; 20. First fan; 21. First heat exchanger; 22. Second heat exchanger; 23. Drive module; 24. Power module; 25. Second guide plate; 26. Second guide channel; 27. Third air duct; 28. Fourth air duct; 29. ​​Partition; 3. Power distribution cabinet; 30. Industrial control computer; 4. Temperature detector; 5. Humidity transmitter; 6. Outer shell; 60. Connecting port; 7. Airflow chamber. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Additionally, it should be noted that in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Please refer to Figure 1-3 This invention provides an environmental test chamber, comprising a test chamber body 1, a mechanical chamber 2, and a power distribution cabinet 3. The test chamber body 1, the mechanical chamber 2, and the power distribution cabinet 3 are fixed to the outer shell 6 of the environmental test chamber. The test chamber body 1 is fixed to the front side of the mechanical chamber 2, and the power distribution cabinet 3 is fixed to the right side of the mechanical chamber 2 and the test chamber body 1. The test chamber body 1 contains a test chamber 19 for testing samples. The mechanical chamber 2 contains a drive module 23 and a power module 24. The power module 24 supplies power to the drive module 23, which serves as the drive system for the moving parts within the environmental test chamber. The power distribution cabinet 3 contains an industrial control computer 30, and the drive module 23 is controlled by the industrial control computer 30.

[0022] It should be noted that the power module 24 and the drive module 23 are both commonly used structures in environmental test chambers and belong to existing technology. Therefore, the power module 24 and the drive module 23 will not be described in detail here.

[0023] Reference Figure 2 The machine room 2 is isolated from the outside air. Inside the machine room 2 are a first fan 20, a first heat exchanger 21, and a second heat exchanger 22. A drive module 23 is located between the first heat exchanger 21 and the second heat exchanger 22, and the second heat exchanger 22 is located between the drive module 23 and the power module 24. Under the action of the first fan 20, the airflow in the machine room 2 enters the first fan 20 from its inlet, then flows sequentially from the outlet of the first fan 20 through the first heat exchanger 21, the drive module 23, the second heat exchanger 22, and the power module 24, finally returning to the inlet of the first fan 20, thus creating a cycle. Understandably, because the mechanical chamber 2 is isolated from the outside air, under the closed airflow circulation path driven by the first fan 20, the airflow passes sequentially through the first heat exchanger 21, the drive module 23, the second heat exchanger 22, and the power module 24, and then flows back to the first fan 20. In this way, the heat generated by the power module 24 is exchanged with the first heat exchanger 21 and then carried away by the cooling medium (circulating cooling water) of the first heat exchanger 21. The heat generated by the drive module 23 is exchanged with the second heat exchanger 22 and then carried away by the cooling medium (circulating cooling water) of the second heat exchanger 22. This achieves staged cooling of the drive module 23 and the power module 24, ensuring that the temperature inside the mechanical chamber 2 is within the normal operating temperature range and enhancing the heat dissipation capacity of the environmental test chamber under high-power load conditions.

[0024] In summary, the environmental test chamber of the present invention can isolate the heat exchange between the mechanical chamber 2 and the outside air by using water cooling mode without relying on external ventilation, thereby preventing external dust from entering the mechanical chamber 2 and ensuring the long-term operational stability of the environmental test chamber.

[0025] It should be noted that the isolation of the machine room 2 from the outside air means that the machine room 2 adopts a completely sealed structure.

[0026] In addition, by rationally arranging the spatial relationship between the heat source (drive module 23, power module 24) and the heat exchange unit (first heat exchanger 21, second heat exchanger 22), the orderly transfer and discharge of heat can be achieved, thereby ensuring the temperature stability and operational reliability of drive module 23 and power module 24 under high heat load while preventing external pollution intrusion; at the same time, it does not rely on external air heat exchange, avoiding risks such as dust accumulation and moisture condensation, and is suitable for application testing scenarios such as semiconductor integrated circuit aging and power module accelerated life test.

[0027] Reference Figure 1The test chamber 1 is equipped with a second fan 18 and a third heat exchanger 10, with the third heat exchanger 10 located on the left side of the test chamber 19. Under the action of the second fan 18, the airflow within the test chamber 1 enters the second fan 18 from its inlet, then flows sequentially through the test chamber 19 and the third heat exchanger 10 from its outlet, finally returning to the inlet of the second fan 18, thus circulating in a cycle. It can be understood that in the closed-loop airflow circulation path driven by the second fan 18, the airflow sequentially passes through the test chamber 19 and the second heat exchanger 22, finally returning to the second fan 18. In this way, the heat generated by the tested sample is exchanged with the third heat exchanger 10 and then carried away by the cooling medium (circulating cooling water) of the third heat exchanger 10, ensuring that the airflow must pass through the third heat exchanger 10 before returning to the second fan 18 after completing the heat exchange with the tested sample, thereby improving heat exchange efficiency. That is... In this embodiment, the test chamber 19 can be cooled by water to ensure that the temperature inside the test chamber 19 is within the normal operating range.

[0028] It is worth noting that since the test chamber 1 is set up independently of the mechanical chamber 2 and its internal airflow can operate in a completely closed loop, the dust, acidic gases or volatile organic compounds generated during the test will not enter the mechanical chamber 2, effectively avoiding problems such as insulation degradation, increased contact resistance and reduced heat dissipation efficiency of the drive module 23 and power module 24 caused by contamination.

[0029] The top edge of the third heat exchanger 10 is flush with the top edge of the test chamber 19. The top edge of the third heat exchanger 10, the top edge of the test chamber 19, and the top wall inside the test chamber 1 form a first air duct 16. The first air duct 16 is connected to the air inlet of the second fan 18. The side wall of the third heat exchanger 10 facing away from the test chamber 19 (the left side wall of the third heat exchanger 10) and the left side wall inside the test chamber 1 form a second air duct 17. The second air duct 17 is connected to the first air duct 16 to form an L-shaped air duct. It can be understood that, driven by the second fan 18, the airflow in the test chamber 1 absorbs heat through the test chamber 19 and releases heat through the third heat exchanger 10 (the heat of the hot airflow is carried away by the circulating cooling water in the third heat exchanger 10). The heat-attenuated airflow enters the second air duct 17, and then enters the air inlet of the second fan 18 through the first air duct 16. Because the third heat exchanger 10 is flush with the top edge of the test chamber 19, it ensures that there are no steps in the first air duct 16, which is conducive to guiding the waste heat airflow dispersed above the test chamber 19 to the inlet direction of the second fan 18. In addition, because the first air duct 16 is directly connected to the air inlet of the second fan 18, it effectively shortens the air duct distance and reduces the friction resistance of the airflow.

[0030] A first guide plate 14 is also fixed inside the test chamber 1. The first guide plate 14 and the side of the test chamber 19 facing away from the third heat exchanger 10 (the right side of the test chamber 19) form a first guide channel 15. The first guide channel 15 is used to guide the airflow discharged from the outlet of the second fan 18 into the test chamber 19. That is to say, the setting of the first guide channel 15 is directly related to the flow direction of the airflow from the outlet of the second fan 18: when the second fan 18 is working, the high-speed airflow discharged from the outlet of the second fan 18 does not directly impact the near-end wall of the test chamber 19 or short-circuit back to the inlet of the second fan 18. Instead, it is forcibly constrained by the first guide plate 14 and guided into the first guide channel 15, which avoids the airflow from being turbulent and impacting at the inlet of the test chamber 19, so that the airflow can participate in the heat exchange in the test chamber 19 more evenly.

[0031] Reference Figure 1 A heater 11 is installed on the top of the test chamber 19 to regulate the temperature of the airflow entering the second fan 18. As an application scenario, when the environmental test chamber is in a low-temperature condition (e.g., 25 ℃) or needs to be heated rapidly (e.g., from 25 ℃ to 90 ℃), the industrial control computer 30 outputs a signal to drive the heater 11 to start based on the deviation between the measured temperature of the test chamber 19 and the set value. The heater 11 directionally heats the airflow flowing through the test chamber 19 in the top space. The heated airflow is then drawn into the test chamber 19 by the second fan 18 and pressurized. After heat exchange with the sample being tested, some of the heat is carried away by the cooling medium of the third heat exchanger 10, and the remaining heat continues to accumulate, causing the temperature of the test chamber 19 to rise according to the preset value. In addition, since the heating point of the airflow is located on the airflow loop and is close to the air inlet of the second fan 18, the heated airflow can participate in heat exchange without long-distance transportation.

[0032] The test chamber 19 employs a water-cooling mode for cooling. The heater 11 targets the airflow that passes through the first air duct 16 but has not yet entered the inlet of the second fan 18. This airflow has completed a full cycle before entering the second fan 18: starting from the outlet of the second fan 18 → the first guide channel 15 → flowing through the test chamber 19 (for heat exchange) → flowing through the third heat exchanger 10 (for cooling) → the second air duct 17 → the first air duct 16 → finally reaching the top space of the test chamber 19. In this area, it is heated by both radiation and convection from the heater 11 before entering the inlet of the second fan 18, completing the temperature compensation. Therefore, the heater 11 does not heat the static air inside the test chamber 19, but rather works in conjunction with the third heat exchanger 10 to ensure that a unit volume of airflow carries heat into the next cycle, thereby achieving a rapid and stable increase in the overall temperature field within the test chamber 19 and achieving precise temperature control.

[0033] The components installed in laboratory 19 for real-time monitoring of its environmental data are conventional existing technology in the field of existing environmental test chambers and will not be described here.

[0034] In addition, the top of the test chamber 1 is provided with an air inlet 12 and an air outlet 13. Of course, the top of the outer shell 6 is provided with a connecting port 60 that communicates with the air inlet 12 and the air outlet 13. Both the air inlet 12 and the air outlet 13 are connected to the L-shaped air duct. The air inlet 12 is provided with a first control valve 120, which is an electric proportional regulating valve controlled by the industrial control computer 30, used to control the airflow rate entering the L-shaped air duct from the outside. The air outlet is provided with a second control valve 130, which is also an electric proportional regulating valve controlled by the industrial control computer 30, used to control the airflow rate discharged from the test chamber 1 to the outside. Therefore, the test chamber 19 in this embodiment can also be cooled using air cooling mode. In air cooling mode, the valves of the first control valve 120 and the second control valve 130 are open, and the airflow enters from the air inlet 12 into the first air duct 16 → the second fan 18 → the first guide channel 15 → the test chamber 19 → the third heat exchanger 10 → the second air duct 17 → the exhaust port 13. Of course, when the test chamber 19 performs water cooling mode, the valves of the first control valve 120 and the second control valve 130 are closed, so that the airflow circulates in a closed loop within the test chamber 1.

[0035] In summary, the test chamber 19 can switch between water cooling and air cooling modes according to the actual working conditions. It should be noted that an airflow chamber 7 is formed between the inner wall of the outer shell 6 and the outer wall of the test chamber 1, which is connected to the mechanical chamber 2. The heat generated by the second fan 18 is dissipated in the airflow chamber 7. Under the action of the first fan 20, the hot airflow in the airflow chamber 7 enters the mechanical chamber 2, and then passes through the first heat exchanger 23 and the second heat exchanger 24 in sequence for heat exchange, thereby removing the heat generated by the second fan 18.

[0036] Reference Figure 2 A second guide plate 25 is fixed inside the machine chamber 2, and a second guide channel 26 is formed between the second guide plate 25 and the first heat exchanger 21. This channel is used to guide the airflow discharged from the outlet of the first fan 20 into the first heat exchanger 21. In other words, the arrangement of the second guide channel 26 is directly related to the flow direction of the airflow from the outlet of the first fan 20: when the first fan 20 is working, the high-speed airflow discharged from the outlet of the first fan 20 does not directly impact the near-end wall of the machine chamber 2 or short-circuit back to the inlet of the first fan 20. Instead, it is forcibly constrained by the second guide plate 25 and guided into the second guide channel 26, preventing turbulent impact at the inlet of the machine chamber 2 and allowing the airflow to participate more evenly in the heat exchange within the machine chamber 2.

[0037] With the machine room 2 completely sealed and without external air exchange, a highly efficient forced airflow path can be formed solely through the interaction between the second guide plate 25 and the first heat exchanger 21. Because the second guide plate 25 imposes spatial constraints on the airflow at the outlet of the first fan 20, the airflow, which is prone to diffusion and deflection, is stably guided to the first heat exchanger 21, thereby improving the heat exchange efficiency per unit airflow. Furthermore, because the airflow is effectively concentrated and utilized, ineffective circulation and energy dissipation are reduced. Under the same fan power, the heat load carrying capacity of the first heat exchanger 21 is improved, indirectly reducing the temperature rise of the drive module 23 under high load conditions.

[0038] In addition, a partition 29 is fixed inside the machine room 2. The partition 29 is located on top of the first heat exchanger 21, the drive module 23, the second heat exchanger 22, and the power module 24. The partition 29 and the top wall of the machine room 2 form a third air duct 27, and the power module 24 and one side wall of the machine room 2 form a fourth air duct 28. The fourth air duct 28 is perpendicular to the third air duct 27. The partition 29 has a connecting part that connects the third air duct 27 and the fourth air duct 28. Specifically, under the premise of sealed operation of the machine room 2, the hot air that originally rises disorderly and tends to accumulate at the top corner is efficiently collected by the third air duct 27, introduced into the fourth air duct 28 through the connecting part, and then guided to the air inlet of the first fan 20 along the side wall, completing a closed-loop circulation. In summary, this structure optimizes the airflow path in the top space of the mechanical room 2 without adding an extra fan or changing the main circulation path, and improves the balance and reliability of the coordinated heat dissipation of multiple heat-generating components. It is suitable for heat dissipation scenarios of high-power drive module 23 and power module 24.

[0039] Of course, the machine room 2 is also equipped with a temperature detector 4 and a humidity transmitter 5 (humidity sensor). The temperature detector 4 is controlled by the industrial control computer 30 and is used to monitor the temperature in the machine room 2 in real time; the humidity transmitter 5 is controlled by the industrial control computer 30 and is used to monitor the humidity in the machine room 2 in real time. That is to say, by monitoring the environmental data in the machine room 2 in real time through the temperature detector 4 and the humidity transmitter 5, the industrial control computer 30 can adaptively adjust the inlet water flow of the first heat exchanger 21 and the second heat exchanger 22, which is conducive to maintaining the temperature balance in the machine room 2.

[0040] The first heat exchanger 21 and the second heat exchanger 22 have the same structure. The inlet water flow of the first heat exchanger 21 and the second heat exchanger 22 can be adjusted by electric regulating valves on their respective inlet water pipes. For example, the industrial control computer 30 can control the valve opening of the electric regulating valves on the inlet water pipes of the first heat exchanger 21 and the second heat exchanger 22 by real-time feedback of environmental data in the machine room 2 from the temperature detector 4 and the humidity transmitter 5.

[0041] It should be noted that the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 10 are all existing structures and will not be described here.

[0042] In conclusion: 1. The mechanical chamber 2 of the environmental test chamber of the present invention uses a water-cooled mode to isolate the heat exchange between the drive chamber and the outside air. Under the action of the first fan 20, the heat of the drive chamber is transferred through the first heat exchanger 21 and the second heat exchanger 22. The heat is carried away by the cooling circulating water inside the first heat exchanger 21 and the second heat exchanger 22, ensuring that the temperature inside the drive chamber is within the normal operating temperature range. At the same time, the temperature is precisely controlled by adjusting the opening of the electric regulating valve on the water inlet pipe of the first heat exchanger 21 and the second heat exchanger 22.

[0043] 2. Water-cooled mode of test chamber 19: Under the action of the second fan 18, the heat in the test chamber 19 is exchanged through the third heat exchanger 10. The heat is carried away by the cooling circulating water in the third heat exchanger 10. At the same time, the temperature is precisely controlled by the opening of the electric regulating valve on the water inlet pipe of the heater 11 and the third heat exchanger 10.

[0044] 3. Air-cooled mode of test chamber 19: Under the action of the second fan 18, the heat in the test chamber 19 is exchanged with the outside through the air inlet 12 and the air outlet 13. The temperature is precisely controlled by the automatic adjustment of the opening of the first control valve 120 and the second control valve 130 in coordination with the heater 11.

[0045] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An environmental test chamber, comprising a mechanical chamber equipped with a drive module and a power module, characterized in that, The machine room is isolated from the outside air. The machine room is equipped with a first fan, a first heat exchanger, and a second heat exchanger. The drive module is located between the first heat exchanger and the second heat exchanger, and the second heat exchanger is located between the drive module and the power module. Under the action of the first fan, the airflow in the machine room enters the first fan from the air inlet end of the first fan, and then flows from the air outlet end of the first fan through the first heat exchanger, the drive module, the second heat exchanger, and the power module in sequence, and then flows back to the air inlet end of the first fan, thus circulating.

2. An environmental test chamber according to claim 1, characterized in that, It also includes a test chamber located on one side of the machine room. The test chamber contains a test chamber, and the test chamber also contains a second fan and a third heat exchanger, with the third heat exchanger located on one side of the test chamber. Under the action of the second fan, the airflow in the test chamber enters the second fan from the inlet end of the second fan, then flows from the outlet end of the second fan through the test chamber and the third heat exchanger in sequence, and then flows back to the inlet end of the second fan, thus circulating in this way.

3. An environmental test chamber according to claim 2, characterized in that, The top edge of the third heat exchanger is flush with the top edge of the test chamber. The top edge of the third heat exchanger, the top edge of the test chamber, and the top wall of the test chamber form a first air duct. The first air duct is connected to the air inlet of the second fan. The side wall of the third heat exchanger facing away from the test chamber and the side wall of the test chamber form a second air duct. The second air duct is connected to the first air duct to form an L-shaped air duct.

4. An environmental test chamber according to claim 3, characterized in that, A heater is installed at the top of the test chamber to regulate the temperature of the airflow entering the second fan.

5. An environmental test chamber according to claim 3, characterized in that, The top of the test chamber is provided with an air inlet and an air outlet, both of which are connected to an L-shaped air duct. A first control valve is provided in the air inlet to control the airflow rate entering the L-shaped air duct from the outside. A second control valve is provided in the air outlet to control the airflow rate discharging from the test chamber to the outside.

6. An environmental test chamber according to claim 2, characterized in that, The test chamber is also equipped with a first guide plate, which forms a first guide channel with the side of the test chamber facing away from the third heat exchanger, for guiding the airflow discharged from the outlet of the second fan into the test chamber.

7. An environmental test chamber according to claim 1, characterized in that, The mechanical chamber is provided with a second guide plate, and a second guide channel is formed between the second guide plate and the first heat exchanger for guiding the airflow discharged from the outlet of the first fan into the first heat exchanger.

8. An environmental test chamber according to claim 1, characterized in that, The mechanical chamber is also equipped with a partition, which is located on top of the first heat exchanger, the drive module, the second heat exchanger, and the power module. The partition and the top wall of the mechanical chamber form a third air duct, and the power module and one side wall of the mechanical chamber form a fourth air duct. The fourth air duct is perpendicular to the third air duct. The partition has a connecting part that connects the third air duct and the fourth air duct.

9. An environmental test chamber according to claim 1, characterized in that, The machine room is also equipped with a temperature detector for real-time monitoring of the temperature inside the machine room.

10. An environmental test chamber according to claim 1, characterized in that, A humidity transmitter is also installed in the machine room to monitor the humidity inside the machine room in real time.

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